CN104315164B - There is the stop valve of several functions - Google Patents
There is the stop valve of several functions Download PDFInfo
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- CN104315164B CN104315164B CN201410493351.0A CN201410493351A CN104315164B CN 104315164 B CN104315164 B CN 104315164B CN 201410493351 A CN201410493351 A CN 201410493351A CN 104315164 B CN104315164 B CN 104315164B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K13/00—Other constructional types of cut-off apparatus; Arrangements for cutting-off
- F16K13/02—Other constructional types of cut-off apparatus; Arrangements for cutting-off with both sealing faces shaped as small segments of a cylinder and the moving member pivotally mounted
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a kind of stop valve with several functions, valve body is a four-way valve body communicated up and down, it is characterised in that: upper through hole is provided with check-valves and the flow control valve of backflow preventer, lower through-hole is provided with stop valve；Partition wall it is provided with between inlet opening and apopore, not connected；It also is provided with partition wall between upper through hole and lower through-hole, partition wall central authorities are provided with limbers, aperture it is drilled with in the middle part of limbers, the upper and lower end of limbers is respectively provided with annular sword limit, valve seat respectively as backflow preventer check-valves and stop valve, the side of valve body also has side opening, and side opening is communicated with limbers by aperture, is provided with the mechanism of detection backflow preventer return valve function in described side opening。The invention solves the deficiency existing for single valve of prior art, develop a kind of stop valve with several functions stop valve, flow valve and backflow preventer three being combined into one。
Description
Technical field
The present invention relates to a kind of stop valve, especially relate to the stop valve of one kind of multiple functions。
Background technology
Generally, lead on the lateral of user at water supply line, except air relief valve and water meter are installed, stop valve, flow valve and backflow preventer to be also installed, owing to valve kind is more, it is desirable to there is bigger installing space, bring bigger workload to again installation and maintenance, and add investment, also add the hidden danger that joint leaks。
Summary of the invention
The present invention mainly solves the deficiency existing for single valve of prior art, thus developing the stop valve of a kind of several functions stop valve, flow valve and backflow preventer three being combined into one；
Other purpose of the present invention is: have the whether normal function with measurement hydraulic pressure of detection backflow preventer performance。
The above-mentioned technical problem of the present invention is addressed mainly by following technical proposals: a kind of stop valve with several functions, valve body is a four-way valve body communicated up and down, inlet opening and apopore are positioned on same level axis, upper through hole and lower through-hole are positioned on same vertical axis, it is characterised in that:
Upper through hole is provided with check-valves and the flow control valve of backflow preventer；
Lower through-hole is provided with stop valve；
Partition wall one it is provided with between inlet opening and apopore；
Being provided with partition wall two between upper through hole and lower through-hole, described partition wall two central authorities are provided with limbers, are drilled with aperture in the middle part of limbers；
The upper and lower end of limbers is respectively provided with annular sword limit, respectively as the valve seat of backflow preventer check-valves and stop valve；
One arc inclined hole connection apopore is arranged at the bottom of upper through hole；
The side of valve body also has side opening, and side opening is communicated with limbers by aperture, is provided with the mechanism of detection backflow preventer return valve function in described side opening；The axis of the axis of side opening and upper lower through-hole intersects vertically, and at grade。
Technical scheme can also be perfect further:
As preferably, the check-valves of backflow preventer and flow control valve contain upper valve rod, fairlead, gland, locking nut, back-up ring, spool, spring, sealing gasket one；
Above through hole is cylinder barrel, and the inner hole of cylinder on described upper through hole top and fairlead are outer round and smooth joins, and is prevented medium from leaking by O-ring seals two, and cylinder barrel cylindrical is provided with external screw thread, screws with the female thread of gland, overlaps on the upper surface being pressed on cylinder barrel in order to being directed to；
Described guiding is cased with the trapezoidal endoporus of single order, and the bigger endoporus on top is corresponding to upper valve rod stage casing outer round and smooth joins, and is prevented medium from leaking by O-ring seals one, and bottom is female thread, screws with the external screw thread of hypomere in upper valve rod；When upper valve rod rotates, upper valve rod can move up and down simultaneously；
The center of upper valve rod has one in order to measure the slightness hole of hydraulic pressure, and there is a screw upper end of slightness hole, and fixes handwheel one with bolt one, packing ring one；The middle epimere of upper valve rod is provided with external screw thread, screws with the female thread of locking nut, in order to lock the position of upper valve rod after flow valve regulating flow；In upper valve rod, the external screw thread root of hypomere is provided with to limit upper valve rod and moves upward the ring washer of position；The cylinder of upper valve rod hypomere axostylus axostyle is sliding with the blind hole of spool joins；Root in spool blind hole is provided with two radial holes, in order to prevent spool from producing gas-tight phenomenon when moving。
The profile of described spool is inverted T-shaped, and lower plane is provided with a cannelure, is provided with sealing gasket one in groove, as the flap of backflow preventer check-valves, is provided with spring between upper end and the lower surface of fairlead of the outer omoplate of spool。
As preferably, described sealing gasket one and sealing gasket two are fixed in cannelure with screw one, packing ring three and screw two, packing ring four respectively。
As preferably, described stop valve includes sealing gasket two, pressing plate, O-ring seals three, bottom flange, lower valve rod, O-ring seals four, packing ring two, bolt two, handwheel two, screw two, packing ring four；
The external screw thread of bottom flange female thread corresponding with lower through-hole screws, and is pressed on the lower surface of lower through-hole, O-ring seals three prevent medium from leaking；After installation, the axis of bottom flange is consistent with the axis of upper and lower through hole；Bottom flange has a stairstepping endoporus, and endoporus and the external diameter of lower valve rod hypomere that lower section is bigger are slided and joined, O-ring seals four prevent medium from leaking, be arranged over screw, screw with the external screw thread in lower valve rod stage casing。
Described lower valve rod is a multidiameter, and equipped with pressing plate on the axostylus axostyle of its upper end, the upper plane of pressing plate is provided with an annular groove, is provided with the sealing gasket two flap as stop valve in groove；The lower end of lower valve rod is fixed with handwheel two, and when rotating handwheel two, lower valve rod can drive sealing gasket three to move up and down, and opens or closes stop valve。
As preferably, corresponding conical valve seat and O-ring seals five in adjustment screw, side opening are contained in the mechanism of detection backflow preventer return valve function；
Female thread and the concentric taper hole as valve seat it is provided with in side opening；
Regulating screw one end and be provided with handwheel, the external screw thread in bar portion is adaptive with the female thread of side opening, and the other end car regulating screw has frustum, and described frustum is adaptive with the taper hole of side opening, and frustum is provided with O-ring seals five；The center regulating screw is drilled with blind hole, and diametric(al) is drilled with two radial holes two, and blind hole communicates with radial hole two；
After installation, the axis regulating screw is consistent with the axis of side opening。
The method have the benefit that
The invention solves the deficiency existing for single valve of prior art, develop a kind of stop valve with several functions stop valve, flow valve and backflow preventer three being combined into one；And also there is the whether normal function with measurement hydraulic pressure of detection backflow preventer performance。Both save investment and also save installing space, easy to maintenance。
Accompanying drawing explanation
Accompanying drawing 1 is a kind of front longitudinal sectional view of the present invention；
Accompanying drawing 2 is the side longitudinal sectional view of Fig. 1。
Description of reference numerals: 1, bolt one, 2, packing ring one, 3, handwheel one, 4, upper valve rod, 5, locking nut, 6, gland, 7, O-ring seals one, 8, O-ring seals two, 9, fairlead, 10, back-up ring, 11, spool, 12, spring, 13, sealing gasket one, 14, sealing gasket two, 15, pressing plate, 16, valve body, 17, O-ring seals three, 18, bottom flange, 19, lower valve rod, 20, O-ring seals four, 21, packing ring two, 22, bolt two, 23, handwheel two, 24, screw one, 25, packing ring three, 26, screw two, 27, packing ring four；28, O-ring seals five, 29, regulate screw；
A, inlet opening, B, apopore, G, limbers, H1, upper through hole, H2, lower through-hole, H3, side opening, W1, partition wall one, W2, partition wall two；
A, arc inclined hole, b, slightness hole, C, aperture, d, radial hole one, e, blind hole, f, radial hole two。
Detailed description of the invention
By the examples below, and in conjunction with accompanying drawing, technical scheme is described in further detail。
Embodiment:
Stop valve as shown in Figure 1, 2, valve body 16 is that a four-way valve body communicated up and down, inlet opening A and apopore B are positioned on same level axis, and upper through hole H1 and lower through-hole H2 is positioned on same vertical axis, and two axial lines intersects vertically and in the same plane。The outer end of inlet opening A and apopore B is provided with female thread (or external screw thread or flange) and is connected with inlet channel and outlet conduit respectively, and holes does not directly communicate, and centre has partition wall one W1 to be separated by；Being provided with partition wall two W2 between upper through hole H1 and lower through-hole H2, central authorities are provided with limbers G, and the axis of limbers G is consistent with the axis of upper and lower through hole, and middle part is drilled with aperture C；The upper and lower side of limbers G is respectively provided with annular sword limit, respectively as the valve seat of backflow preventer check-valves and stop valve；The bottom of upper through hole H1 has an arc inclined hole a to connect apopore B；The side of valve body 16 also has side opening H3, is communicated with limbers G by aperture C, and the axis of the axis of side opening H3 and upper lower through-hole H1, H2 intersects vertically, and at grade。
The check-valves of backflow preventer and flow control valve are arranged in through hole H1, are made up of parts such as bolt 1, packing ring 1, handwheel 1, upper valve rod 4, locking nut 5, gland 6, O-ring seals 1, O-ring seals 28, fairlead 9, back-up ring 10, spool 11, spring 12, sealing gasket 1, screw 1 and packing rings 3 25。The inner hole of cylinder on upper through hole H1 top is round and smooth with outside fairlead 9 joins, and is prevented medium from leaking by O-ring seals 28；The female thread of the external screw thread on cylinder barrel cylindrical and gland 6 screws, and is pressed on the upper surface of cylinder barrel in order to be directed to set 9。After installation, the axis of fairlead is consistent with the axis of upper lower through-hole H1, H2；Guiding is cased with the trapezoidal endoporus of single order, the bigger endoporus on top is corresponding to upper valve rod 4 stage casing outer round and smooth joins, and prevented medium from leaking by O-ring seals 1, bottom is female thread, screw with the external screw thread of hypomere in upper valve rod 4, therefore, when rotation handwheel 1 makes upper valve rod 4 rotate, upper valve rod 4 can move up and down simultaneously。
After installation, the axis of upper valve rod 4 is consistent with the axis of upper lower through-hole H1, H2, and there is an elongated hole b at its center, and there is a screw upper end of hole b, in order to measure hydraulic pressure, and fixes handwheel 1 with bolt 1, packing ring 1, and packing ring 1 can prevent leaked water；The middle epimere external screw thread of upper valve rod 4 and the female thread of locking nut 5 screw, in order to lock the position of upper valve rod 4 after flow valve regulating flow；The root of upper valve rod 4 lower end axostylus axostyle is provided with ring washer 10, in order to limit the position that upper valve rod 4 moves upward；The cylindrical of axostylus axostyle is sliding with the blind hole of spool 11 joins。
The profile of spool 11 is inverted T-shaped, and lower plane is provided with a cannelure, is provided with sealing gasket 2 13 in groove, as the flap of backflow preventer check-valves, and is fixed in cannelure with screw 1, packing ring 3 25；Root in spool 11 blind hole is provided with two radial hole d, in order to prevent spool 11 from producing gas-tight phenomenon when moving。
It is provided with spring 12 between the upper end and the lower surface of fairlead 9 of the outer omoplate of spool 11, spring 12 has certain pretightning force after mounting, therefore, when not water flowing, sealing gasket 1 is close on the annular sword limit above the G of limbers all the time, and for avoiding excessive flow resistance loss, pretightning force is unsuitable excessive, as long as ensureing that when medium flows backwards, check-valves can cut out rapidly and seal reliably, it is recommended that the pressure of opening of check-valves is 0.01 ± 0.002MPa。
Stop valve is arranged in the lower through-hole H2 of valve body 16, is made up of parts such as sealing gasket 2 14, pressing plate 15, O-ring seals 4 20, O-ring seals 3 17, bottom flange 18, lower valve rod 19, O-ring seals 4 20, packing ring 2 21, bolt 2 22, handwheel 2 23, screw 2 26, packing rings 4 27。The external screw thread of bottom flange 18 female thread corresponding with lower through-hole H2 screws, and is pressed on the lower surface of lower through-hole H2, O-ring seals 3 17 prevent medium from leaking；After installation, the axis of bottom flange 18 is consistent with the axis of upper and lower through hole H1, H2；Bottom flange 18 has a stairstepping endoporus, and endoporus and the external diameter of lower valve rod 19 hypomere that lower section is bigger are slided and joined, O-ring seals 4 20 prevent medium from leaking, and the external screw thread in the screw of top and lower valve rod 19 stage casing screws。
Lower valve rod 19 is a multidiameter, and equipped with pressing plate 15 on the axostylus axostyle of its upper end, the upper plane of pressing plate 15 is provided with an annular groove, is provided with sealing gasket 2 14 in groove, as the flap of stop valve；Pressing plate 15 is fixed on the axostylus axostyle of lower valve rod 19 by screw 2 26, packing ring 4 27, and is fixed in the groove of pressing plate 15 by sealing gasket 2 14；The lower end of lower valve rod 19 is fixed with handwheel 2 23, and when rotating handwheel 2 23, lower valve rod 19 can drive sealing gasket 2 14 to move up and down, and opens or closes stop valve。
The mechanism of detection backflow preventer return valve function is arranged in the side opening H3 of valve body 16, is formed by regulating the corresponding part such as conical valve seat and O-ring seals 5 28 in screw 29, side opening H3。Being provided with female thread and the concentric taper hole as valve seat in side opening H3, female thread and the external screw thread regulating screw 29 stage casing screw。Having rolled straight burr on the cylindrical of the handwheel of adjustment screw 29 one end, other end car has frustum, frustum to be provided with O-ring seals 5 28, and frustum tapering is consistent with side opening H3 internal taper hole tapering。The center regulating screw 29 is drilled with blind hole e, and diametric(al) is drilled with two radial hole f, and hole e and f communicates。After installation, the axis regulating screw 29 is consistent with the axis of side opening H3。
The functional analysis of the present invention:
1, in normal water supply situation, stop valve is in fully open position, now, the press water P1 of water inlet overcomes the pressure of spring 12, by spool upwards jack-up, valve port is opened, and water flows out from apopore B through inlet opening A, lower through-hole H2, limbers G, upper through hole H1, arc inclined hole a, downstream supplies water。
2, in water supply process, if owing to cut off the water supply suddenly or the reason such as upstream line maintenance, causing import hydraulic pressure is negative pressure, or outlet hydraulic pressure is when significantly increasing to over import hydraulic pressure suddenly, valve port is closed rapidly by sealing gasket 1 under the promotion of spring 12, it is therefore prevented that downstream filthy water or noxious substance pollute cleaning water source。
When 3, regulating flow, first should be fully open by stop valve, then locking nut 5 is unclamped, rotate handwheel 1, due to moving up and down of upper valve rod 4, change the distance △ between upper valve rod 4 lower surface and spool 11 blind hole bottom surface, thus change the aperture of valve port, namely change flow, regulate after meeting the requirements, then locking nut 5 is locked。
It should be noted that adjusted flow is maximum stream flow, if in use require once in a while relatively low discharge time, it is possible to turn down stop valve aperture realize。
4, when to measure hydraulic pressure, it is first shut off stop valve, then the bolt 1 at upper valve rod 4 top and packing ring 1 is unloaded, load onto Pressure gauge, be again turned on stop valve water flowing, hydraulic pressure value can be recorded。
5, when to test the return valve function as backflow preventer whether under normal time, first stop valve is closed, then adjustment screw 29 is slowly exited, if check valve seal is damaged, or sealing valve port place blocked by foreign material, so the water in downstream can pass through limbers G, aperture C, side opening H3, radial hole two f, continuously outflows from the blind hole e regulating screw 29。Owing to inspection method is very simple, do not need again any instrument, therefore can check at any time, find that whether the function of check-valves is normal in time。
6, there is stop valve function, except stop valve structure of the present invention, still can adopt the stop valve of other structure。
Claims (5)
1. a stop valve with several functions, valve body (16) is a four-way valve body communicated up and down, inlet opening (A) and apopore (B) are positioned on same level axis, and upper through hole (H1) and lower through-hole (H2) are positioned on same vertical axis, it is characterised in that:
Upper through hole (H1) is provided with check-valves and the flow control valve of backflow preventer；
Lower through-hole (H2) is provided with stop valve；
Partition wall one (W1) it is provided with between inlet opening (A) and apopore (B)；
Being provided with partition wall two (W2) between upper through hole (H1) and lower through-hole (H2), described partition wall two central authorities are provided with limbers (G),
Middle part, limbers (G) is drilled with aperture (c)；
The upper and lower end of limbers (G) is respectively provided with annular sword limit, respectively as the valve seat of backflow preventer check-valves and stop valve；
The bottom of upper through hole (H1) has arc inclined hole (a) to connect apopore (B)；
The side of valve body (16) also has side opening (H3), and side opening is communicated with limbers (G) by aperture (c), described side opening
(H3) mechanism of detection backflow preventer return valve function it is provided with in；The axis of the axis of side opening (H3) and upper lower through-hole (H1, H2) intersects vertically, and at grade。
2. the stop valve with several functions according to claim 1, it is characterised in that:
The check-valves of backflow preventer and flow control valve contain upper valve rod (4), fairlead (9), gland (6), locking nut (5), back-up ring (10), spool (11), spring (12), sealing gasket one (13)；
Above through hole (H1) is cylinder barrel, the inner hole of cylinder on described upper through hole (H1) top is joined with fairlead (9) is round and smooth outward, and prevented medium from leaking by O-ring seals two (8), cylinder barrel cylindrical is provided with external screw thread, screw with the female thread of gland (6), be pressed on the upper surface of cylinder barrel in order to be directed to set (9)；
Described fairlead (9) has a stairstepping endoporus, and the bigger endoporus on top is corresponding to upper valve rod (4) stage casing outer round and smooth joins, and is prevented medium from leaking by O-ring seals one (7)；Bottom is female thread, screws with the external screw thread of hypomere in upper valve rod (4), and when upper valve rod (4) rotates, upper valve rod (4) can move up and down simultaneously；
The center of upper valve rod (4) has one in order to measure the slightness hole (b) of hydraulic pressure, and there is a screw upper end of slightness hole (b), and fixes handwheel one (3) with bolt one (1), packing ring one (2)；The middle epimere of upper valve rod (4) is provided with external screw thread, screws with the female thread of locking nut (5), in order to lock the position of upper valve rod (4) after Flow-rate adjustment valve regulation flow；In upper valve rod (4), the external screw thread root of hypomere is provided with to limit the back-up ring (10) of the position that upper valve rod (4) moves upward；The cylinder of upper valve rod (4) hypomere axostylus axostyle is sliding with the blind hole of spool (11) joins；Root in spool (11) blind hole is provided with two radial holes (d), in order to prevent spool (11) from producing gas-tight phenomenon time mobile；
The profile of described spool (11) is inverted T-shaped, lower plane is provided with a cannelure, it is provided with sealing gasket one (13) in groove, as the flap of backflow preventer check-valves, between the lower surface of the upper end of spool (11) outer omoplate and fairlead (9), is provided with spring (12)。
3. the stop valve with several functions according to claim 2, it is characterised in that:
Sealing gasket one (13) and sealing gasket two (14) are fixed in cannelure with screw one (24), packing ring three (25) and screw two (26), packing ring four (27) respectively。
4. the stop valve with several functions according to claim 1 and 2, it is characterised in that:
Described stop valve includes sealing gasket two (14), pressing plate (15), O-ring seals three (17), bottom flange (18), lower valve rod (19), O-ring seals four (20), packing ring two (21), bolt two (22), handwheel two (23), screw two (26), packing ring four (27)；
The external screw thread of bottom flange (18) female thread corresponding with lower through-hole (H2) screws, and is pressed on the lower surface of lower through-hole (H2), O-ring seals three (17) prevent medium from leaking；After installation, the axis of bottom flange (18) is consistent with the axis of upper and lower through hole (H1, H2)；Bottom flange (18) has a stairstepping endoporus, and endoporus and the external diameter of lower valve rod (19) hypomere that lower section is bigger are slided and joined, O-ring seals four (20) prevent medium from leaking, be arranged over screw, screw with the external screw thread in lower valve rod (19) stage casing；
Described lower valve rod (19) is a multidiameter, and equipped with pressing plate (15) on the axostylus axostyle of its upper end, the upper plane of pressing plate (15) is provided with an annular groove, is provided with the sealing gasket two (14) flap as stop valve in groove；And sealing gasket two (14) is fixed in the groove of pressing plate (15)；The lower end of lower valve rod (19) is fixed with handwheel two (23), and when rotating handwheel two (23), lower valve rod (19) can drive sealing gasket two (14) to move up and down, and opens or closes stop valve。
5. the stop valve with several functions according to claim 1 and 2, it is characterised in that:
Corresponding conical valve seat and O-ring seals five (28) in adjustment screw (29), side opening (H3) are contained in the mechanism of detection backflow preventer return valve function；
Female thread and the concentric taper hole as valve seat it is provided with in side opening (H3)；
Regulating screw (29) one end and be provided with handwheel, the external screw thread in shank of screw portion is adaptive with the female thread of side opening (H3), and the other end car regulating screw has frustum, and described frustum is adaptive with the taper hole of side opening (H3), and frustum is provided with O-ring seals five (28)；The center regulating screw (29) is drilled with blind hole (e), and diametric(al) is drilled with two radial holes two (f), and described blind hole communicates with radial hole two；
After installation, the axis regulating screw (29) is consistent with the axis of side opening (H3)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410493351.0A CN104315164B (en) | 2014-09-24 | 2014-09-24 | There is the stop valve of several functions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410493351.0A CN104315164B (en) | 2014-09-24 | 2014-09-24 | There is the stop valve of several functions |
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| Publication Number | Publication Date |
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| CN104315164A CN104315164A (en) | 2015-01-28 |
| CN104315164B true CN104315164B (en) | 2016-06-22 |
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| CN201410493351.0A Active CN104315164B (en) | 2014-09-24 | 2014-09-24 | There is the stop valve of several functions |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134971A (en) * | 2015-09-28 | 2015-12-09 | 苏州洛特兰新材料科技有限公司 | Check valve for ammonia |
| CN105736816A (en) * | 2016-03-19 | 2016-07-06 | 许月进 | Control valve of water feeding pipeline of hydraulic water well drilling rig |
| CN110206893B (en) * | 2019-06-10 | 2020-12-22 | 浙江卡博铜业有限公司 | Stop valve convenient to adjust |
| DE102020113290A1 (en) * | 2020-05-15 | 2021-11-18 | A. u. K. Müller GmbH & Co KG. | Valve with a backflow preventer |
| CN112032368B (en) * | 2020-09-01 | 2022-06-03 | 超达阀门集团股份有限公司 | Anti-seize lifting check valve |
| CN114210281B (en) * | 2022-01-29 | 2024-09-17 | 无锡恒诚硅业有限公司 | Slurry reaction tank waste heat recovery system |
| CN115370760B (en) * | 2022-10-21 | 2022-12-20 | 胜利阀门有限公司 | Bivalve cuts check valve |
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|---|---|---|---|---|
| US3906991A (en) * | 1972-11-09 | 1975-09-23 | Beringer Hydraulik Gmbh | Hydraulic lowering check valve |
| CN2869474Y (en) * | 2005-05-22 | 2007-02-14 | 陈国平 | Multifunctional valve |
| CN2869473Y (en) * | 2005-05-22 | 2007-02-14 | 陈国平 | Multifunctional valve |
| CN203784325U (en) * | 2014-04-19 | 2014-08-20 | 郑珊红 | Multifunctional adjusting stop valve |
| CN204114182U (en) * | 2014-09-24 | 2015-01-21 | 杭州春江阀门有限公司 | There is the stop valve of several functions |
-
2014
- 2014-09-24 CN CN201410493351.0A patent/CN104315164B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3906991A (en) * | 1972-11-09 | 1975-09-23 | Beringer Hydraulik Gmbh | Hydraulic lowering check valve |
| CN2869474Y (en) * | 2005-05-22 | 2007-02-14 | 陈国平 | Multifunctional valve |
| CN2869473Y (en) * | 2005-05-22 | 2007-02-14 | 陈国平 | Multifunctional valve |
| CN203784325U (en) * | 2014-04-19 | 2014-08-20 | 郑珊红 | Multifunctional adjusting stop valve |
| CN204114182U (en) * | 2014-09-24 | 2015-01-21 | 杭州春江阀门有限公司 | There is the stop valve of several functions |
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| Publication number | Publication date |
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| CN104315164A (en) | 2015-01-28 |
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