CN215333384U - Pump cover structure suitable for high-pressure cleaning piston pump - Google Patents

Abstract

The utility model provides a pump cover structure suitable for a high-pressure cleaning piston pump, which comprises a pump cover, wherein a pump inlet and a pump outlet respectively extend from two sides of the pump cover, the pump inlet and the pump outlet are coaxially arranged, a bulge structure which is vertically arranged with the pump inlet and the pump outlet is arranged between the pump inlet and the pump outlet, a first accommodating chamber is arranged inside the bulge structure and is used for installing an overflow valve assembly, through the design of the chamber inside the pump cover, the utility model fully utilizes the inner space of the pump cover, optimizes a connecting structure, reduces the appearance size of the pump cover, has a compact structure, provides a new structure for the miniaturization process of equipment, is beneficial to the popularization and the use of application scenes with limited installation space, and simultaneously, the pump cover has excellent mechanical load capacity by arranging an annular structure outside the pump cover and integrally adopting an integrated forming or welding mode, the working stability of the equipment is improved.

Description

Pump cover structure suitable for high-pressure cleaning piston pump

Technical Field

The utility model relates to the technical field of piston pumps, in particular to a pump cover structure suitable for a high-pressure cleaning piston pump.

Background

The piston pump is also called as an electric reciprocating pump, is structurally divided into a single cylinder and a plurality of cylinders, is characterized by high lift, is suitable for conveying oil emulsion without solid particles at normal temperature and the like, and can convey corrosive liquid if an overflowing part is made of stainless steel. In addition, high-temperature tar, slime, high-concentration mortar, high-viscosity liquid and the like can be conveyed according to different structural materials.

The prior art piston pump has a plurality of pump chambers, into which pistons are respectively inserted, the pistons are driven by a swash plate to reciprocate to periodically change the volumes of the pump chambers, and liquid is sucked into the pump chambers and is output to outlets to generate pressure along with the movement of plungers by a connecting supply line which is provided at an inlet and a water inlet valve and a water outlet valve which communicate with the pump chambers, and the outlets.

The piston pump generates huge mechanical load during operation and closing process, so that an overflow valve is generally arranged in a high-pressure area to unload harmful pressure so as to protect the piston pump from being damaged by the harmful pressure, and meanwhile, a switch control functional part is arranged to realize shutdown of a switch gun, particularly an outlet channel and a pump cover behind a water outlet valve.

Patent document CN 104053907B discloses a piston pump (10) for a high-pressure cleaning device, which has a plurality of pump chambers (20) into which reciprocating pistons (22) are respectively inserted, and which are respectively in flow connection with a suction inlet (14) via a suction valve (24) and in flow connection with a pressure outlet (16) via a pressure valve (26), wherein the suction valve (24) includes a suction valve closing body (28) which can be sealingly abutted against a suction valve seat (30), and wherein the pressure valve (26) includes a pressure valve closing body (48) which can be sealingly abutted against a pressure valve seat (52), wherein the pressure valve seat (52) and the suction valve seat (30) have different radial distances from a pump longitudinal axis (64), but the design of the pump is not compact, the volume is large.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a pump cover structure suitable for a high-pressure cleaning piston pump.

The pump cover structure suitable for the high-pressure cleaning piston pump comprises a pump cover, wherein a pump inlet and a pump outlet are respectively extended from two sides of the pump cover, and the pump inlet and the pump outlet are coaxially arranged;

the pump comprises a pump inlet and a pump outlet, and is characterized in that a bulge structure which is perpendicular to the pump inlet and the pump outlet is arranged between the pump inlet and the pump outlet, a first accommodating chamber is arranged inside the bulge structure, and the first accommodating chamber is used for installing an overflow valve assembly.

Preferably, the outside of pump cover is provided with annular muscle structure just annular muscle structure respectively with pump inlet, pump export, uplift structural connection.

Preferably, the pump cover is provided with a bypass pipeline for connecting the outlet of the pump and the first accommodating chamber, and the bypass pipeline is matched with the overflow valve assembly to realize the pressure relief of fluid in the outlet of the pump.

Preferably, the pump cover and the annular rib structure are welded or integrally formed.

Preferably, one end of the ridge structure is a first diameter end and is connected with the annular rib structure, the ridge structure is a first diameter end and passes through the annular rib structure and extends to the outside of the annular rib structure, and the second diameter is larger than the first diameter.

Preferably, the cross-sectional area of the water inlet end of the pump outlet is smaller than the cross-sectional area of the water outlet end.

Preferably, a plurality of limiting edges extend from the bottom of the pump cover along the circumferential direction, and the limiting edges are used for positioning when the pump cover is connected with other equipment.

Preferably, the pump inlet and the pump outlet are respectively provided with an integrally formed flat structure along the circumferential direction, and the cross section of the flat structure is rectangular.

Preferably, the long edges of the two sides of the rectangle are respectively provided with an arc-shaped structure matched with the pump inlet or the pump outlet.

Preferably, the pump cover is provided with connecting through holes which are uniformly or non-uniformly arranged along the circumferential direction of the annular rib structure, and the connecting through holes are provided with reinforcing plate ribs along the circumferential direction.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, through the design of the inner cavity of the pump cover, the inner space of the pump cover is fully utilized, the connection structure is optimized, the appearance size of the pump cover is reduced, the structure is compact, a new structure is provided for the miniaturization process of equipment, and the popularization and the use of an application scene with limited installation space are facilitated.

2. According to the utility model, the pump cover is provided with the annular structure outside and integrally formed or welded, so that the pump cover has better mechanical load capacity and the working stability of the equipment is improved.

3. According to the utility model, the pump inlet and the pump outlet are coaxially arranged, the overflow valve assembly is respectively and vertically arranged with the pump inlet and the pump outlet, the pressure relief function of the water outlet valve is realized by the minimum internal space through the matching of the valve rod and the valve seat in the overflow valve assembly, the structure is compact, the design is novel, compared with the prior art, less materials are used under the condition of the same load capacity, and meanwhile, the pressure relief can be rapidly carried out through the overflow valve assembly when the pump outlet is shut down, the structure is compact, and the practicability is strong.

Drawings

Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic perspective view of a pump cover according to the present invention;

FIG. 2 is a schematic view of the interior of the pump cover according to the present invention;

FIG. 3 is a schematic side view of a pump cover according to the present invention;

FIG. 4 is a schematic sectional view of the piston pump according to the present invention;

FIG. 5 is a schematic view of the construction of the valve seat of the present invention;

FIG. 6 is a schematic illustration of the relief valve assembly in a closed condition;

FIG. 7 is a schematic view of the relief valve assembly in an open position.

The figures show that:

pump cover 1 water seal holding body 28

Pump cavity 2 piston ring seal 29

Piston ring 3 bulging structure 30

Cylinder 4 and cylinder sealing member 31

Bracket 5 plunger 32

Pump inlet 6 return spring 33

Spring 7 shim 34

8 jump ring 35 of overflow mouth body

Overflow valve seat 9 plane bearing 36

Pump outlet 10 swashplate 37

Valve seat 11 connecting rod 38

First bearing 39 of first accommodation chamber 12

Seal packing 40 of bypass pipeline 13

Reinforcing plate rib 14 driving shaft 41

First O-ring 15 safety shield housing 42

Second bearing 43 of second O-ring 16

Third O-ring 17 oil storage space seal 44

Fourth O-ring 18 stop edge 45

Valve stem 19 first bolt 51

Fifth O-ring 20 second bolt 52

Rubber ring 21 relief valve assembly 70

Longitudinal axis 80 of suction valve 22

Annular rib structure 90 of suction valve stem 23

Suction valve stem spring 24 valve seat through hole 111

Relief passage 112 of pressure valve 25

Pilot rib position 113 of pressure valve spring 26

Water seal 27 limiting table 191

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the utility model. All falling within the scope of the present invention.

Example 1:

the utility model provides a pump cover structure suitable for a high-pressure cleaning piston pump, which comprises a pump cover 1, wherein a pump inlet 6 and a pump outlet 10 extend from two sides of the pump cover 1 respectively, the pump inlet 6 and the pump outlet 10 are coaxially arranged, a bump structure 30 which is perpendicular to the pump inlet 6 and the pump outlet 10 is arranged between the pump inlet 6 and the pump outlet 10, the size of the pump is greatly reduced through the arrangement of the structure, the arrangement of equipment is facilitated when the installation scene is limited, and the application range is wide. The interior of the boss structure 30 is provided with a first receiving chamber 12, and the first receiving chamber 12 is used for mounting a relief valve assembly 70. In a preferred embodiment, the cross-sectional area of the water inlet end of the pump outlet 10 is smaller than the cross-sectional area of the water outlet end.

Specifically, the outside of pump cover 1 is provided with annular muscle structure 90 just annular muscle structure 90 respectively with pump inlet 6, pump export 10, uplift structure 30 are connected, pump cover 1 and annular muscle structure 90 are welding or integrated into one piece, preferably adopt integrated into one piece, and integrated into one piece can greatly increased the bearing strength of pump cover.

Further, one end of the raised structure 30 is a first diameter end and is connected to the annular rib structure 90, the raised structure 30 is a first diameter end and passes through the annular rib structure 90 and extends to the outside of the annular rib structure 90, so that the raised structure is structurally matched with the relief valve assembly 70, wherein the second diameter is larger than the first diameter.

Specifically, a bypass pipeline 13 for connecting the pump outlet 10 and the first accommodating chamber 12 is arranged on the pump cover 1, and the bypass pipeline 13 is matched with the overflow valve assembly 70 to realize pressure relief of fluid in the pump outlet 10.

Specifically, a plurality of limiting edges 45 extend from the bottom of the pump cover 1 along the circumferential direction, and the limiting edges 45 are used for positioning when the pump cover 1 is connected with other equipment, so that the alignment procedure in the installation process is reduced, and the assembly efficiency can be improved.

Specifically, pump inlet 6, pump export 10 are provided with integrated into one piece's flat column structure respectively along circumference, the cross section of flat column structure is the rectangle, in a preferred example, be provided with respectively on the long limit of rectangle both sides with pump inlet 6 or pump export 10 assorted arc structure, flat column structure has both increased bearing strength, makes the appearance of pump cover not have convex structure again, makes the overall structure of pump cover compact.

Specifically, the pump cover 1 is provided with connecting through holes which are uniformly or non-uniformly arranged along the circumferential direction of the annular rib structure 90, and the connecting through holes are provided with reinforcing plate ribs 14 along the circumferential direction, so that the strength of the pump cover when the pump cover is connected with other parts is greatly enhanced. In a preferred embodiment, the pump cover 1 includes an upper cover and a lower cover, the upper cover and the lower cover are matched and fixedly connected through a plurality of first bolts 51, and a connecting through hole on the pump cover 1 is fixedly connected with the pump cavity 2 through a second bolt 52.

Specifically, the relief valve assembly 70 includes a valve rod 19 and a valve seat 11 that is fittingly sleeved on the valve rod 19, the valve seat 11 is provided with a valve seat through hole 111 that is circumferentially arranged and an overflow passage 112 that is circumferentially arranged along an inner wall of an end portion, as shown in fig. 2 and 5, the pump outlet 10 is connected with the valve seat through hole 111 through a bypass pipeline 13 that is provided on the pump cover 1, the relief valve assembly 70 can be switched between an open state and a closed state, and in a process from the closed state to the open state, fluid in the pump outlet 10 passes through the bypass pipeline 13 and the valve seat through hole 111 in sequence to drive the valve rod 19 to move toward the relief valve seat 9 relative to the valve seat 11. In the open state, as shown in fig. 2, 5, and 7, the valve seat through hole 111 is communicated with the first accommodation chamber 12 through the clearance between the valve rod 19 and the valve seat 11 and the overflow passage 112 in this order, and in the closed state, as shown in fig. 2, 5, and 6, the valve rod 19 is in sealing contact with the valve seat 11, the passage between the valve seat through hole 111 and the overflow passage 112 is blocked by the valve rod 19, and the valve seat through hole 111 is not communicated with the first accommodation chamber 12.

Further, in a preferred embodiment, the overflow channels 112 are uniformly arranged along the inner wall of the valve seat 11 at intervals in the circumferential direction, a guide rib position 113 is formed between every two adjacent overflow channels 112, and a plurality of overflow channels 112 are arranged along the circumferential direction, so that the pressure relief efficiency is improved, and meanwhile, the valve rod 19 is ensured to be displaced along the axial direction by the plurality of guide rib positions 113 arranged along the circumferential direction.

Specifically, as shown in fig. 1 and 2, the relief valve assembly 70 includes a spring 7, an overflow port body 8 and an overflow port valve seat 9, the overflow port valve seat 9 is installed inside the pump cover 1, one end of the overflow port body 8 passes through the overflow port valve seat 9 and is connected with the valve rod 19, the other end of the overflow port body 8 is movably matched with the overflow port valve seat 9, the valve rod 19 extends out of a limiting table 191 along the circumferential direction, the spring 7 is sleeved on the valve rod 19 and is arranged between the limiting table 191 and the overflow port valve seat 9, and when the valve rod 19 moves, the spring 7 can be compressed and shortened under the pushing of the limiting table 191. It should be noted that the spring 7 is always in a compressed state, and thus there is always a spring force pressing the valve rod 19.

Further, the valve rod 19 is in threaded connection with the overflow port body 8, in a preferred example, an internal threaded hole is formed in the end portion of the valve rod 19, and the end portion of the overflow port body 8 is installed in the internal threaded hole in a matching mode through an external thread.

Specifically, the pump cover 1 is internally provided with a limiting through hole, the valve rod 19 penetrates through the limiting through hole and the limiting through hole can limit the movement stroke of the valve rod 19 towards the overflow port valve seat 9, so that the phenomenon that the circumferential sealing element of the valve rod 19 fails due to the overlarge movement stroke of the valve rod 19, so that fluid is blown into other parts through a gap between the valve rod 19 and the valve seat 11 to influence the normal operation of equipment is prevented.

It should be noted that, when the pressure relief valve is installed, the pretightening force of the spring 7 is adjusted according to the predetermined pressure relief pressure, the adjusting case of the pretightening force of the spring 7 is realized by adjusting the distance between the overflow port valve seat 9 and the limiting table 191, the shorter the distance is, the larger the initial elastic force of the spring 7 is, and the larger the pressure required when the pump outlet 10 is relieved.

Specifically, the valve rod 19 is provided with a first annular groove and a second annular groove which are arranged at intervals along the circumferential direction, a first sealing element and a second sealing element are respectively arranged in the first annular groove and the second annular groove, the first sealing element and the second sealing element are respectively arranged on two sides of the valve seat through hole 111, and the sealing fit between the valve rod 19 and the valve seat 11 is realized through the first sealing element and the second sealing element. The valve seat 11 is circumferentially provided with third annular grooves and fourth annular grooves which are arranged at intervals, third sealing elements and fourth sealing elements are respectively arranged in the third annular grooves and the fourth annular grooves, the third sealing elements and the fourth sealing elements are respectively arranged on two sides of the valve seat through hole 111, and the third sealing elements and the fourth sealing elements are used for realizing sealing fit between the valve seat 11 and the pump cover 1. The other end of the overflow port body 8 is in sliding fit with the overflow port valve seat 9, as shown in fig. 1, the overflow port body 8 is matched with the conical opening of the overflow port valve seat 9 through a set conical surface, and when the overflow valve assembly 70 is in a closed state, the conical surface on the overflow port body 8 is in sealing fit with the conical opening of the overflow port valve seat 9; when the spill valve assembly 70 is in the open state, the pump outlet 10 is relieved of pressure via the bypass line 13, at which point the conical surface on the spill port body 8 moves away from the conical mouth of the spill port valve seat 9 to form a gap-arranged structure, at which point sealing is achieved solely by the sliding contact surfaces of the spill port body 8 and the spill port valve seat 9. In a preferred embodiment, the end of the overflow outlet body 8 in contact with the overflow outlet valve seat 9 is circumferentially lined with a plastic material, such as polypropylene or an outer rubber lining layer, along the circumference of the overflow outlet body 8.

Further, in a preferred embodiment, the first sealing element, the second sealing element, the third sealing element and the fourth sealing element are respectively a fourth O-ring 18, a fifth O-ring 20, a second O-ring 16 and a third O-ring 17.

Specifically, the overflow valve seat 9 is provided with a fifth annular groove along the circumferential direction, and a sixth sealing member is arranged in the fifth annular groove. The sixth sealing element preferably adopts a first O-shaped ring 15, and the first O-shaped ring 15 is used for realizing the sealing connection between the overflow port valve seat 9 and the inner wall of the pump cover 1.

Example 2:

this embodiment is a preferred embodiment of embodiment 1.

The high-pressure cleaning piston pump adopting the pump cover structure in the embodiment is shown in fig. 1-7 and comprises a pump cover 1, a pump cavity 2, a piston ring 3, an oil cylinder 4 and an overflow valve assembly 70, wherein one end of the pump cavity 2 is connected with the pump cover 1, a pump cavity sealing element is arranged between the pump cover 1 and the pump cavity 2, the pump cavity sealing element preferably adopts a rubber ring 21, the other end of the pump cavity 2 is connected with the oil cylinder 4 through the piston ring 3, a piston ring sealing element 29 is arranged between the pump cavity 2 and the piston ring 3, an oil cylinder sealing element 31 is arranged between the piston ring 3 and the oil cylinder 4, and the piston ring sealing element 29 and the oil cylinder sealing element 31 preferably adopt rubber sealing elements. The two sides of the pump cover 1 are respectively connected with a pump inlet 6 and a pump outlet 10, the pump cover 1 is circumferentially provided with an annular rib structure 90, a first accommodating chamber 12 is arranged inside the pump cover 1, the overflow valve assembly 70 penetrates through the first accommodating chamber 12, and the pump cover 1 is provided with a bypass pipeline 13 connected with the first accommodating chamber 12 and used for pressure relief of the pump outlet 10; the pump cavity 2 is arranged in an annular structure and is internally provided with one or more plunger cavities, the tops of the plunger cavities are respectively provided with a suction valve 22 and a pressure valve 25, the plunger cavities are connected with a pump inlet 6 through the suction valve 22, the plunger cavities are connected with a pump outlet 10 through the pressure valve 25, the piston rings 3 are internally provided with plunger assemblies, the oil cylinder 4 is internally provided with a transmission assembly, and under the driving of the transmission assembly and the plunger assemblies, plungers 32 of the plunger assemblies can reciprocate in the plunger cavities, so that the suction valve 22 can be driven to suck fluid in the pump inlet 6 into the plunger cavities, and the fluid in the plunger cavities can be conveyed to the pump outlet 10 through the pressure valve 25.

Further, the suction valve 22 includes a suction valve rod 23 and a suction valve rod spring 24 sleeved on the suction valve rod 23, when the plunger 32 moves downwards to form negative pressure in the plunger cavity, the suction valve rod 23 overcomes the elastic force of the suction valve rod spring 24 to make the fluid in the pump inlet 6 flow into the plunger cavity, and after the pressure in the plunger cavity is balanced with the pressure of the fluid in the pump inlet 6, the suction valve rod 23 returns under the elastic force of the suction valve rod spring 24. The end of the pressure valve 25 facing the pump outlet 10 is fitted with a pressure valve spring 26, and when the fluid pressure in the plunger chamber rises above the pressure valve spring 26, the fluid pushes the pressure valve 25 towards the pressure valve spring 26, and the pressure valve spring 26 compresses and shortens to flow the fluid from the plunger chamber to the pump outlet 10.

In particular, in a preferred embodiment, the piston ring 3 has three circular plunger chambers which are held in the correct position with the pump chamber 2 by means of a water seal holder 28 and which support a water seal 27, the annular wall of the pump chamber 2 supporting the water seal holder 28 and surrounding the water seal 27, the water seal 27 sealingly abutting against the plunger 32 with a sealing lip.

Specifically, as shown in fig. 1, the plunger assembly includes a return spring 33, a washer 34 and a circlip 35, one end of the plunger 32 extends into the plunger cavity, the other end of the plunger 32 is provided with a clamp spring 35, the return spring 33 is sleeved on the plunger 32, one end of the return spring is connected with the clamp spring 35 through a gasket 34, the other end of the return spring 33 is connected with the piston ring 3, the transmission assembly comprises a plane bearing 36, a swash plate 37, a connecting rod 38 and a driving shaft 41, one end of the driving shaft 41 extends into the cylinder 4 and is connected to the swash plate 37 by a connecting rod 38, the flat bearing 36 is fitted over the swash plate 37, the other end of the drive shaft 41 extends to the outside of the cylinder 4, the swash plate 37 is arranged obliquely with respect to the radial direction of the plunger 32, when the driving shaft 41 drives the swash plate 37 to rotate, the swash plate 37 is movably matched with the plunger 32.

Each plunger 32 is held by the force of a return spring 33 against a flat bearing 36 on a swash plate 37, the swash plate 37 being rotatably supported on the cylinder 4 about the longitudinal axis 80 of the pump, so that the pistons 32 can be moved back and forth in the axial direction of the longitudinal axis 80 of the pump by the rotary movement of the swash plate 37, and the volume of the plunger chambers can be changed periodically.

Further, the driving shaft 41 is sequentially sleeved with a first bearing 39, a driving shaft gear and a second bearing 43 along the circumferential direction, the power mechanism is provided with a power gear, the power gear is meshed with the driving shaft gear in a matching manner, the driving shaft 41 can be driven to rotate when the power mechanism rotates, the first bearing 39 is installed inside the oil cylinder 4, and the second bearing 43 is installed on the support 5. In a preferred embodiment, the power mechanism is a motor, and a sealing chamber is further arranged between the driving shaft 41 and the oil cylinder 4, and the sealing chamber is preferably filled with a sealing packing 40.

Specifically, support 5 plays the effect of support on the one hand, also provides radiating space for driving shaft gear, power gear simultaneously, and the bottom of hydro-cylinder 4 is installed on support 5 and form the oil storage space, and the oil storage space adds suitable amount of lubricating oil for gear drive heat dissipation lubrication, is provided with oil storage space sealing member 44 between hydro-cylinder 4 and the support 5. In a preferred embodiment, a safety shield 42 is provided outside the oil storage space.

Specifically, the piston ring 3 is provided with a spring support mechanism and extends into the cylinder 4 to be movably matched with one side of the upper surface of the swash plate 37, and the plunger 32 is movably matched with the other side of the upper surface of the swash plate 37.

The working principle of the high-pressure cleaning piston pump is as follows:

when the piston pump works, the motor rotates to drive the power gear to rotate, and then the drive shaft gear can drive the drive shaft 41 to rotate, the swash plate 37 is driven to rotate around the longitudinal axis 80 of the pump, the piston 32 can reciprocate in the axial direction of the longitudinal axis 80 of the pump through the rotating motion of the swash plate 37, when the piston 32 moves downwards, a negative pressure space is formed at the top of the plunger cavity, the suction valve rod 23 overcomes the elastic force of the suction valve rod spring 24 to be opened, and then fluid in the pump inlet 6 flows into the plunger cavity, and after the pressure in the plunger cavity is balanced with the fluid pressure in the pump inlet 6, the suction valve rod 23 returns under the elastic force of the suction valve rod spring 24. One end of the pressure valve 25 facing the pump outlet 10 is sleeved with a pressure valve spring 26, when the fluid pressure in the plunger cavity rises to be larger than the elastic force of the pressure valve spring 26, the fluid pushes the pressure valve 25 to move towards the pressure valve spring 26, the pressure valve spring 26 is compressed and shortened to further enable the fluid to flow from the plunger cavity to the pump outlet 10, after a spray gun connected with the pump outlet is closed, the motor stops working, the pressure of the fluid in the pump outlet 10 rises instantly, the pressure in the pump inlet 6 is reduced, therefore, the pressure of the pump outlet 10 and the pressure in the pump inlet 6 form a pressure difference, the fluid in the pump outlet 10 pushes the valve rod 19 to move towards the overflow valve seat 9 through the bypass pipeline 13 and the valve seat through hole 111, further, the passage of the valve seat through hole 111 flowing to the first accommodating space 12 is opened, and the fluid enters the first accommodating space 12 and the pump inlet 6 from the valve seat through hole 111 through the overflow passage 112 in sequence, the pressure at the outlet 10 of the pump is reduced, and the pressure relief function after the gun is shut down is realized.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the utility model. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (10)

1. A pump cover structure suitable for a high-pressure cleaning piston pump is characterized by comprising a pump cover (1), wherein a pump inlet (6) and a pump outlet (10) extend from two sides of the pump cover (1) respectively, and the pump inlet (6) and the pump outlet (10) are coaxially arranged;

a bump structure (30) which is perpendicular to the pump inlet (6) and the pump outlet (10) is arranged between the pump inlet (6) and the pump outlet (10), a first accommodating chamber (12) is arranged inside the bump structure (30), and the first accommodating chamber (12) is used for installing an overflow valve assembly (70).

2. A pump cover structure suitable for a high-pressure cleaning piston pump according to claim 1, characterized in that an annular rib structure (90) is arranged on the outside of the pump cover (1) and the annular rib structure (90) is connected with the pump inlet (6), the pump outlet (10) and the bump structure (30) respectively.

3. A pump cover structure suitable for a high-pressure clean piston pump according to claim 1, characterized in that a bypass pipeline (13) connecting the pump outlet (10) and the first accommodating chamber (12) is arranged on the pump cover (1), and the bypass pipeline (13) is matched with the overflow valve assembly (70) to realize the pressure relief of fluid inside the pump outlet (10).

4. A pump cover structure suitable for a high pressure cleaning piston pump according to claim 2, characterized in that the pump cover (1) and the annular rib structure (90) are welded or integrally formed.

5. A pump cover structure suitable for a high pressure cleaning piston pump according to claim 2, characterized in that one end of the ridge structure (30) is a first diameter end and connects the annular rib structure (90), the ridge structure (30) is a first diameter end and passes through the annular rib structure (90) and extends to the outside of the annular rib structure (90), wherein the second diameter is larger than the first diameter.

6. A pump cover construction suitable for a high pressure cleaning piston pump according to claim 1, characterized in that the cross-sectional area of the water inlet end of the pump outlet (10) is smaller than the cross-sectional area of the water outlet end.

7. A pump cover structure suitable for a high-pressure clean piston pump according to claim 1, characterized in that a plurality of limit edges (45) extend from the bottom of the pump cover (1) along the circumferential direction, and the limit edges (45) are used for positioning the pump cover (1) when being connected with other equipment.

8. A pump cover structure suitable for a high-pressure cleaning piston pump according to claim 1, characterized in that the pump inlet (6) and the pump outlet (10) are respectively provided with an integrally formed flat structure along the circumferential direction, and the cross section of the flat structure is rectangular.

9. A pump cover structure suitable for a high-pressure cleaning piston pump according to claim 8, characterized in that the long sides of the rectangle are respectively provided with an arc-shaped structure matched with the pump inlet (6) or the pump outlet (10).

10. A pump cover structure suitable for a high-pressure cleaning piston pump according to claim 1, characterized in that the pump cover (1) is provided with connecting through holes uniformly or non-uniformly arranged along the circumferential direction of the annular rib structure (90), and the connecting through holes are provided with reinforcing plate ribs (14) along the circumferential direction.

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