CN210322605U

CN210322605U - Hydraulic tool

Info

Publication number: CN210322605U
Application number: CN201920735315.9U
Authority: CN
Inventors: 张恩泽; 沈国斌; 强宏理; 姜顺明
Original assignee: MHPS Dongfang Boiler Co Ltd
Current assignee: MHPS Dongfang Boiler Co Ltd
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2020-04-14
Anticipated expiration: 2029-05-21

Abstract

The utility model relates to a water pressure frock. The utility model discloses a connecting rod to the connecting piece that has inside cavity that connecting rod both ends are fixed in to the mode of dismantling, with the connecting piece with the built-in cavity's that has that is connected with outside water pressure device sealing member that has of mode fixed connection, sealing member is fixed in the outside end opposite with the connecting rod on the connecting piece, and built-in cavity is linked together with inside cavity, and inside cavity has at least one outside apopore of intercommunication connecting piece. The utility model provides a prior art be difficult to the orificial technical problem of shutoff sealing connection pipe under the condition that the inboard pipeline section of mouth of pipe is shorter, the mouth of pipe outer wall does not set up the dog, provide a water pressure frock that is used for exhaust-heat boiler heating surface tube panel. The utility model has the advantages of simple structure, safety, reliability and convenient use.

Description

Hydraulic tool

Technical Field

The utility model relates to a water pressure frock especially relates to a water pressure frock that is used for exhaust-heat boiler heating surface tube panel, belongs to power station boiler equipment and makes the field.

Background

The tube panels (see figure 1) of the heating surfaces of the waste heat boiler are required to be subjected to hydraulic pressure tests according to the regulations before being connected with other tube panels. When a hydraulic pressure test is carried out, pipe orifices at two ends of a connecting pipe 801 of the heating surface tube panel are required to be sealed and plugged, and at least one pipe orifice at one end is connected with external hydraulic pressure equipment through a hydraulic pressure tool. The hydraulic tool for plugging and connecting the pipe orifice generally comprises an internal expansion plug (shown in figure 2) and a large pipe hydraulic tool (shown in figure 3). As can be seen from fig. 2, when the internal expansion plug is used, the internal expansion plug is fixed on the pipe orifice of the connecting pipe 801 by the expansion cylinder 901 expanding with the inner wall of the pipe orifice, and the mandrel 902 and the sealing element 903 are inserted into a deeper position (usually about 100mm away from the pipe orifice) in the pipe orifice, so that when the internal expansion plug is used, the length of the pipe section inside the pipe orifice needs to be more than 100mm, and the pipe section does not have other pipe orifices so as to ensure the expansion cylinder 901 expanding with the pipe orifice firmly and the effective sealing of the sealing element 903 against the pipe orifice; as can be seen from the attached figure 3, when the large pipe hydraulic tool is used, the large pipe hydraulic tool is connected with the pipe orifice of the connecting pipe 801 in a flange connection mode, the sealing element 703 blocks the sealed pipe orifice, and the upper flange 701 and the lower flange 702 are connected and fixed with the pipe orifice through the stop block 802 arranged on the outer wall of the pipe orifice. And the heated surface tube 803 of the waste heat boiler heated surface tube panel is located close to the tube opening positions at the two ends of the connecting tube 801, so that the conditions that the tube section at the inner side of the tube opening of the connecting tube 801 is short (less than 100 mm) and the outer wall of the tube opening can not be provided with a stop block are very common.

Disclosure of Invention

The utility model discloses mainly solving the technical problem that the water pressure frock is difficult to form sealed fixed connection with the connecting pipe mouth of pipe of exhaust-heat boiler heating surface tube panel under the condition that the inboard pipeline section of mouth of pipe is shorter, the mouth of pipe outer wall does not set up the dog that prior art exists, providing one kind can form sealed fixed connection's the water pressure frock that is used for exhaust-heat boiler heating surface tube panel with the connecting pipe mouth of pipe under the condition that the inboard pipeline section of mouth of pipe is shorter, the mouth of pipe outer wall of mouth of pipe does not set up the dog.

The utility model discloses to above-mentioned technical problem mainly can solve through following technical scheme: the utility model discloses a connecting rod to the connecting piece that has inside cavity that connecting rod both ends are fixed in to the mode of dismantling, with the connecting piece with the built-in cavity's that has that is connected with outside water pressure device sealing member that has of mode fixed connection, sealing member is fixed in the outside end opposite with the connecting rod on the connecting piece, and built-in cavity is linked together with inside cavity, and inside cavity has at least one outside apopore of intercommunication connecting piece.

Preferably, the sealing component comprises a screw rod connected with the connecting piece in a threaded manner, a positioning piece, a baffle, an elastic sealing piece, a cover plate and a locking piece are sleeved on the screw rod along the connecting piece in sequence, and the built-in cavity is an axial through hole penetrating through the screw rod.

Preferably, the cover plate has a circular truncated cone protruding toward the elastic seal member, the circular truncated cone having a diameter corresponding to the diameter of the baffle plate, and the elastic seal member is formed by laminating a plurality of rubber circular plates having a diameter corresponding to the diameter of the baffle plate.

Preferably, the positioning piece and the locking piece are in threaded connection with the screw rod, and the connecting piece is in threaded connection with the connecting rod.

Therefore, the utility model discloses rational in infrastructure has following advantage:

the utility model is provided with two groups of sealing parts which are connected through a connecting rod, the two groups of sealing parts are respectively used for plugging and sealing the pipe orifices at two ends of a connecting pipe on a tube panel of a heating surface of the waste heat boiler, the connecting rod is equivalent to the connecting pipe in length and is inserted into the connecting pipe, and the sealing parts are fixed on the pipe orifices of the connecting pipe by the connecting rod; the sealing part is provided with a built-in cavity for water inlet in a hydrostatic test, the built-in cavity is communicated with the internal cavity on the connecting piece, and water from an external hydrostatic device enters the internal cavity through the built-in cavity and then is guided into the connecting pipe through the water outlet hole.

As the preferred scheme of the utility model, the sealing part comprises a screw rod of which the inner side end is connected with the connecting piece and the outer side end is connected with the external hydraulic device, and water from the external hydraulic device is guided into the connecting pipe through an axial through hole penetrating through the screw rod and a water outlet hole on the connecting piece during the hydraulic test;

a positioning piece, a baffle, an elastic sealing piece, a cover plate and a locking piece are sequentially sleeved on the upper edge of the screw rod outwards along the connecting piece; the positioning piece is used for positioning the baffle and the elastic sealing piece, and the positioning piece can adopt a nut matched with the screw rod; the diameters of the baffle and the elastic sealing piece are matched with the inner diameter of the pipe orifice of the connecting pipe on the tube panel of the heating surface of the waste heat boiler and are used for plugging the sealing pipe orifice; the cover plate is used for sealing the pipe orifice and is locked and fixed through the locking part, the elastic sealing part is clamped with the baffle through the cover plate to play a sealing role, and the locking part can adopt a nut matched with the screw rod.

During a hydrostatic test, the screw rod is fixed at two ends of the connecting rod through the connecting piece respectively, the connecting rod penetrates into the connecting pipe, the baffle plate and the elastic sealing piece which are sleeved on the screw rod are respectively blocked at pipe orifices at two ends of the connecting pipe, the cover plate which is sleeved on the screw rod is respectively covered on the pipe orifices at two ends of the connecting pipe and is locked and fixed through the locking piece, and the two groups of sealing parts are in sealing fixed connection with the pipe orifices at two ends of the connecting pipe; the outer side end of the screw is connected with an external water pressure device, and water from the external water pressure device enters the connecting pipe through the axial through hole on the screw and the water outlet hole on the connecting piece; when the water pressure rises, the axial pressure acting on the baffle is borne by the connecting rod.

As a preferred scheme of the utility model, the cover plate is provided with a protruding round platform, when the cover plate covers the pipe orifice of the connecting pipe, the round platform extends into the pipe orifice to clamp the elastic sealing element, and under the condition that the outer diameter of the round platform is equivalent to the inner diameter of the connecting pipe, the round platform is matched with the pipe orifice to prevent the cover plate from generating circumferential displacement at the pipe orifice; the elastic sealing element is formed by overlapping a plurality of rubber circular plates, and the thickness of the elastic sealing element can be adjusted by increasing or decreasing the rubber circular plates so as to adapt to the length of the pipe section at the inner side of the pipe opening.

As the preferred scheme of the utility model, the positioning piece and the locking piece are in threaded connection with the screw rod, the structure of the sealing part can be simplified, and the manufacturing cost can be reduced; the connecting piece is in threaded connection with the end part of the connecting rod, and the total length of the connecting rod after being connected with the connecting piece can be adjusted within the length range limited by the connecting threads.

Therefore, the utility model provides a water pressure frock be difficult to form sealed fixed connection's technical problem with the connecting pipe mouth of pipe under the condition that the inboard pipeline section of mouth of pipe is shorter, the mouth of pipe outer wall does not set up the dog, provide a water pressure frock that is used for exhaust-heat boiler heating surface tube panel. The utility model has the advantages of simple structure, safety, reliability and convenient use.

Drawings

FIG. 1 is a schematic view of a tube panel of a heating surface of a waste heat boiler;

FIG. 2 is a schematic structural view of an internal expansion plug;

FIG. 3 is a schematic structural view of a large pipe hydraulic tool;

fig. 4 is a schematic structural diagram of a preferred embodiment of the present invention;

fig. 5 is an assembly view of the preferred embodiment of the present invention shown in fig. 4;

fig. 6 is a schematic view of the usage status of the preferred embodiment of the present invention shown in fig. 4.

Description of reference numerals: 1-a connecting rod; 2-a connector; 21-water outlet; 22-an internal cavity; 3-a sealing member; 31-a screw; 32-a baffle; 33-cover plate; 331-a circular truncated cone; 34-an elastomeric seal; 35-a positioning member; 36-a retaining member; 37-built-in cavity; 701-an upper flange; 702-a lower flange; 703-a seal; 801-connecting pipe; 802-a stop; 803-heated surface tube; 901-expanding a cylinder; 902-a mandrel; 903-sealing element.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example 1: as shown in the attached drawings 1, 4, 5 and 6, the utility model comprises a connecting rod 1, connecting pieces 2 fixed at two ends of the connecting rod 1, and a sealing part 3 fixedly connected with the connecting rod 1 through the connecting pieces 2, wherein the sealing part 3 is provided with a built-in cavity 37 connected with an external water pressure device, and the connecting piece 2 is provided with an internal cavity 22 and a water outlet 21;

the connecting piece 2 is respectively connected with the connecting rod 1 and the screw rod 31 in a threaded manner, and the internal cavity 22 and the water outlet hole 21 are positioned between the connecting rod 1 and the screw rod 31;

the sealing component 3 comprises a screw 31, a positioning part 35, a baffle 32, an elastic sealing part 34, a cover plate 33 and a locking part 36 which are sleeved on the screw 31 along the connecting part 2 in sequence, wherein external threads are arranged at two ends of the screw 31, the positioning part 35 and the locking part 36 adopt nuts matched with the external threads on the screw 31, an internal cavity 37 is an axial through hole which penetrates through the screw 31 and is communicated with the internal cavity 22, and the baffle 32 is a circular plate with the diameter equivalent to the inner diameter of the connecting pipe 801;

the cover plate 33 has a protruding boss 331 on the side facing the elastic seal 34, and the boss 331 has a diameter corresponding to that of the baffle 32;

the elastic seal 34 is formed by laminating rubber disks having a diameter corresponding to that of the baffle 32.

When the utility model is used, the connecting rod 1 with the length adapted is selected according to the length of the connecting pipe 801, the connecting pieces 2 are respectively arranged at the two ends of the connecting rod 1, the total length after the connection is adjusted by rotating the connecting pieces 2, the positioning piece 35, the baffle 32 and the elastic sealing piece 34 are sequentially arranged on the screw rod 31, and then the inner side end of the screw rod 31 close to the positioning piece 35 is in threaded connection with the connecting piece 2; inserting the connecting rod 1 and the screw 31 which are connected into a whole into the connecting pipe 801, and adjusting the positions of the baffle 32 and the elastic sealing element 34 on the screw 31 by rotating the positioning piece 35 to enable the baffle 32 and the elastic sealing element 34 to be positioned in the pipe orifice of the connecting pipe 801 and outside the pipe orifice of the heated surface pipe 803; a cover plate 33 and a locking piece 36 are arranged on a screw rod 31, the screw rod 31 is exposed out of the outer side end of a connecting pipe 801 and is connected with an external water pressure device, water from the external water pressure device enters the connecting pipe 801 through an axial through hole and a water outlet hole 21 in the screw rod 31, when the pipe screen of the heating surface of the waste heat boiler is full of water, the cover plate 33 is pushed to enable a circular truncated cone 331 to be embedded into the pipe orifice of the connecting pipe 801 to clamp an elastic sealing element 34, then the cover plate 33 is locked through the locking piece 36, and when the cover plates 33 on the pipe orifices at two ends of the connecting pipe.

Of course, the drawings and examples are only for the purpose of illustrating and explaining the present invention and should not be taken as unduly limiting the invention. All the technical solutions obtained by making equivalent adjustments and changes according to the present invention fall within the protection scope of the present invention.

Claims

1. The utility model provides a water pressure frock which characterized in that: the water-saving device comprises a connecting rod (1), connecting pieces (2) which are fixed at two ends of the connecting rod (1) in a detachable mode and are provided with inner cavities (22), sealing parts (3) which are fixedly connected with the connecting pieces (2) in a detachable mode and are provided with built-in cavities (37) connected with an external water pressure device, the sealing parts (3) are fixed at the outer side ends of the connecting pieces (2) opposite to the connecting rod (1), the built-in cavities (37) are communicated with the inner cavities (22), and at least one water outlet hole (21) communicated with the outside of the connecting pieces (2) is formed in the inner cavities (22).

2. The hydraulic tool according to claim 1, wherein: sealing member (3) include with screw rod (31) that connecting piece (2) are connected with the spiro union mode, follow connecting piece (2) are outwards overlapped in proper order and are located setting element (35), baffle (32), elastic sealing spare (34), apron (33), retaining member (36) of screw rod (31), built-in cavity (37) is for running through the axial through-hole of screw rod (31).

3. The hydraulic tool according to claim 2, wherein: the cover plate (33) is provided with a circular truncated cone (331) protruding towards one side of the elastic sealing piece (34), the diameter of the circular truncated cone (331) is equal to that of the baffle (32), and the elastic sealing piece (34) is formed by overlapping a plurality of rubber circular plates with the diameter equal to that of the baffle (32).

4. A hydraulic tool according to claim 2 or 3, characterized in that: setting element (35) and retaining member (36) with screw rod (31) adopt threaded connection, connecting piece (2) with connecting rod (1) adopts threaded connection.