CN2800009Y - Bivalve type hydraulic balancing and slowly closing check valve - Google Patents
Bivalve type hydraulic balancing and slowly closing check valve Download PDFInfo
- Publication number
- CN2800009Y CN2800009Y CN 200420023339 CN200420023339U CN2800009Y CN 2800009 Y CN2800009 Y CN 2800009Y CN 200420023339 CN200420023339 CN 200420023339 CN 200420023339 U CN200420023339 U CN 200420023339U CN 2800009 Y CN2800009 Y CN 2800009Y
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- hydraulic cylinder
- butterfly plate
- valve body
- valve
- damping device
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Abstract
The utility model provides a double-clack type hydraulic balancing and slow closing check valve which comprises a valve body device, a double-clack butterfly plate device and a hydraulic cylinder damping device, wherein the valve body device comprises a front half valve body, a back half valve body and a valve seat; the double-clack butterfly plate device is positioned in the front half valve body, and comprises a right butterfly plate, a left butterfly plate, a fixing long shaft and a clamping short shaft; the hydraulic cylinder damping device is detachably connected to and arranged at the left, the right and the back sides of the back half valve body, and comprises a hydraulic cylinder device and a hydraulic damping device; the hydraulic cylinder device comprises a plunger piston, a hydraulic cylinder and a compression spring; the hydraulic damping device comprises an air bag type energy accumulator, a retaining valve and a dispensing flow valve which are orderly connected. The hydraulic cylinder damping device of the double-clack type hydraulic balancing and slow closing check valve provided by the utility model is not influenced by media, and has functions in the rated operating range which comprises a low-voltage running point so as to cause the butterfly plates of the valve to achieve two-stage closing of fast and slow; in addition, the damping device is convenient to overhaul and has small impact.
Description
Technical field
The utility model relates to the control valve unit in a kind of pipe-line system, specifically, relates to a kind of medium counter flow that prevents and closes and produce the bivalve formula hydro-cushion buffer valve of excessive water hammer.
Background technique
Disclose a kind of bivalve formula oil pressure buffer valve at China patent ZL95210746.5, it comprises: valve body, bivalve valve plate, and composition such as oil hydraulic cylinder damping device.Divide two stages to close, the phase I is pressed on the piston that is in extended position fast by the torsion spring on refluence water and the valve plate, closes major part, only stays the fraction open degree.The second stage arrear is slowly closed by the oil hydraulic cylinder damping device, to avoid the excessive water hammer of closing.Above-mentioned buffer valve shortcoming is: the power that piston stretches out oil cylinder converts the oil pressure that equates with pressure medium to from the pressure of working medium, when safety check at low pressure operation, be generally less than when equaling 0.18Mpa, the oil pressure that produces is not enough to overcome the resistance that piston stretches out oil cylinder, thereby makes the oil hydraulic cylinder damping device inoperative.During low pressure, the oil hydraulic cylinder damping device is inoperative, is unallowed, and this is because safety check in running, can not guarantee not occur the low pressure operation point.Another shortcoming is that oil hydraulic cylinder is arranged in the all-in-one-piece valve body, and whether oil hydraulic cylinder leakage of oil, piston move to be obstructed all can not discover, and mounting or dismounting are inconvenience also.In addition, when valve plate closes soon, can send bigger Strike note.
Summary of the invention
A kind of bivalve formula hydro-cushion buffer valve that the utility model provides, its cylinder damping device is not subjected to the influence of medium working pressure, comprise that in nominal working range the low pressure operation point can both work, making in the valve butterfly plate reach two stages of speed closes, in addition, this damping device maintenance is convenient, clashes into little.
For achieving the above object, the utility model provides a kind of bivalve formula hydro-cushion buffer valve, and it comprises valve means, bivalve butterfly plate device and oil hydraulic cylinder damping device;
Described valve means comprises preceding half valve body, later half valve body and valve seat, and preceding half valve body and later half valve body combine with releasable connection by being vertical mating face with axis, and valve seat is between preceding half valve body and later half valve body;
Described bivalve butterfly plate device is arranged in preceding half valve body, comprises right butterfly plate, left butterfly plate, fixedly major axis, clamping minor axis;
Described right butterfly plate and left butterfly plate are the door hinge state and are positioned fixedly on the major axis, and can rotate in 90 ° of scopes;
Described clamping minor axis is parallel to fixedly major axis, when the bivalve butterfly plate is opened, can prevent that it from swinging on one side, simultaneously can guarantee the reliability that right butterfly plate and left butterfly plate are closed by medium counter flow, after right butterfly plate and left butterfly plate are opened, this minor axis of clamping makes right butterfly plate and left butterfly plate and valve axis be 30 ° of angle states;
Described right butterfly plate and left butterfly plate also include the rubber collision block respectively, described rubber collision block is disconnectable, and be installed in respectively on the position of the plunger collision in right butterfly plate, left butterfly plate and the described oil hydraulic cylinder damping device, can reduce Strike note, also reduce the contact stress of plunger;
Described oil hydraulic cylinder damping device is arranged on the left and right outside of later half valve body with releasable connection, and it comprises hydraulic cylinder device and hydraulic damping device;
Described hydraulic cylinder device comprises plunger, oil hydraulic cylinder and pressure spring; One end of described pressure spring is connected with the inner bottom part of oil hydraulic cylinder; Described plunger connects the other end of pressure spring; This pressure spring is used to overcome the frictional force that plunger stretches out oil hydraulic cylinder;
Scribble color sign on the described plunger;
Described oil hydraulic cylinder is with the diameter plunger piston fluid pressure cylinder;
Whether described oil hydraulic cylinder also comprises a watch window, can observe the plunger that scribbles color sign at any time by this watch window, normal to judge that plunger moves;
Described hydraulic damping device comprises air-bag type accumulator, one-way valve and the adjustment stream valve that connects successively; Hydraulic oil enters the non-external part of plunger by one-way valve, and the hydraulic oil of non-external part flow back in the air-bag type accumulator by adjusting the stream valve;
The import of described air-bag type accumulator connects preceding half valve body.
A kind of bivalve formula hydro-cushion buffer valve that the utility model provides, plunger two ends in its oil hydraulic cylinder damping device are subjected to identical pressure, pressure spring on the plunger is used to overcome the frictional force that plunger stretches out oil cylinder, under the effect of balance pressure and pressure spring power, this kind device could not be subjected to the influence of medium working pressure, as long as in the rated working pressure scope, move, comprise the low pressure operation point, described device can make safety check follow procedure realization two stages of speed close, thereby reaches elimination or reduce water hammer.In addition, the oil hydraulic cylinder damping device is arranged on the left and right outside of later half valve body with releasable connection, wherein has peep hole on the oil hydraulic cylinder, and the rubber collision block is housed on the butterfly plate.Adopt after the said structure, under user mode, mounting or dismounting and maintenance are convenient, and Strike note is little.
Description of drawings
Fig. 1 is the structural representation of a kind of bivalve formula hydro-cushion buffer valve of providing of the utility model.
Fig. 2 is the structural representation of the oil hydraulic cylinder damping device of a kind of bivalve formula hydro-cushion buffer valve of providing of the utility model.
Embodiment
Followingly specify a kind of preferred forms of the present utility model according to Fig. 1, Fig. 2:
The utility model provides a kind of bivalve formula hydro-cushion buffer valve, and it comprises valve means, bivalve butterfly plate device and oil hydraulic cylinder damping device;
Described valve means comprises preceding half valve body 11, later half valve body 12 and valve seat 13, described preceding half valve body 11 and later half valve body 12 are by combining with releasable connection with mating face that axis is vertical place, and described valve seat 13 is between preceding half valve body 11 and later half valve body 12;
Described bivalve butterfly plate device is arranged in preceding half valve body 11, and it comprises right butterfly plate 21, left butterfly plate 22, fixedly major axis 23, clamping minor axis 24;
Described right butterfly plate 21 and left butterfly plate 22 are the door hinge state and are positioned fixedly on the major axis 23, and can rotate in 90 ° of scopes;
Described clamping minor axis 24 is parallel to fixedly major axis 23, when bivalve butterfly plate 21 and 22 is opened, can prevent that it from swinging on one side, simultaneously can guarantee the reliability that right butterfly plate 21 and left butterfly plate 22 are closed by medium counter flow, after right butterfly plate 21 and left butterfly plate 22 are opened, this minor axis 24 of clamping makes right butterfly plate 21 and left butterfly plate 22 be 30 ° of angle states with valve axis;
Described right butterfly plate 21 and left butterfly plate 22 also include rubber collision block 221 (211) and torsion spring 222 (212) respectively, described rubber collision block 221 (211) is disconnectable, and be installed in respectively on the position of plunger 311 collisions in right butterfly plate 21, left butterfly plate 22 and the described oil hydraulic cylinder damping device, can reduce Strike note, also reduce the contact stress of plunger 311;
Described oil hydraulic cylinder damping device 3 usefulness releasable connections are arranged on the left and right outside of later half valve body 12, and it comprises hydraulic cylinder device and hydraulic damping device;
Described hydraulic cylinder device comprises plunger 311, oil hydraulic cylinder 312 and pressure spring 313; One end of described pressure spring 313 is connected with the inner bottom part of oil hydraulic cylinder 312; Described plunger 311 connects the other end of pressure spring 313; This pressure spring 313 is used to overcome the frictional force that plunger 311 stretches out oil hydraulic cylinder 312;
Scribble color sign on the described plunger 311;
Described oil hydraulic cylinder 312 is with the diameter plunger piston fluid pressure cylinder;
Whether described oil hydraulic cylinder 312 also comprises a watch window 3121, can observe the plunger 311 that scribbles color sign at any time by this watch window 3121, normal to judge that plunger 311 moves;
Described hydraulic damping device comprises air-bag type accumulator 3211, the one-way valve 3221 that connects successively and the stream valve 3222 of adjusting;
The import of described air-bag type accumulator 3211 connects preceding half valve body 11;
Hydraulic oil in the air-bag type accumulator 3211 enters the non-external part of plunger 311 by one-way valve 3221, and plunger 311 non-external part hydraulic oil flow back in the air-bag type accumulator 3211 by adjusting stream valve 3222.
According to Fig. 1, the plunger 311 in the left end oil hydraulic cylinder damping device is in the state of stretching out, the left butterfly plate 22 that the jail, top will be closed.Plunger 311 is in stressed closed condition in the oil hydraulic cylinder damping device of right-hand member.
According to Fig. 2, the air-bag type accumulator 3211 in the oil hydraulic cylinder damping device, as liquid pressure transducer, accumulator 3211 imports connect preceding half valve body 11, and the pressure of Qu Chuing can think to be equal to or greater than the pressure that plunger 311 external parts bear working medium here.After the pressure that plunger 311 external parts bear working medium enters air-bag type accumulator 3211, but the liquid that is full of to its lower end by rubbery air pocket 3212 synchronous drivings oil also enters into plunger 311 non-external parts through one-way valve 3221, thereby makes plunger 311 two ends be subjected to identical pressure.The pressure spring 313 of plunger 311 non-external parts is used to overcome the frictional force that plunger 311 stretches out oil hydraulic cylinder 312.The stressing conditions at plunger 311 two ends, satisfying under the above-mentioned condition, above-mentioned device can not be subjected to the influence of medium working pressure, as long as be operated in the interior operation of the rated working pressure scope of safety check, be included in the low pressure operation point, the oil hydraulic cylinder damping device can both work.When right butterfly plate 21 and left butterfly plate 22 stressed closing, when being pressed in plunger 311 external parts, the hydraulic oil of non-external part is back in the air-bag type accumulator 3211 through adjustment stream valve 3222.
A kind of bivalve formula hydro-cushion buffer valve that the utility model provides carries out work by following working method:
Safety check is installed on the pump discharge pipeline, and right butterfly plate 21 and left butterfly plate 22 are in usually by sealing state, to prevent medium counter flow.By pipeline medium pressure right butterfly plate 21 and left butterfly plate 22 are opened, when opening, the hydraulic oil of air-bag type accumulator 3211 bottoms enters the non-external part of plunger 311 by one-way valve 3221, under the effect of balance pressure and pressure spring 313, makes plunger 311 be in the state of stretching out.
When water pump stops suddenly, under torsion spring 212 (222) on right butterfly plate 21 and the left butterfly plate 22 and the acting in conjunction of refluence water, right butterfly plate 21 and left butterfly plate 22 fast automatic closing, but because plunger 311 is in the release location, right butterfly plate 21 and left butterfly plate 22 can not Close Alls, also surplus about about 25% unlatching cross sections are passed through water, have weakened water hammer pressure; Right butterfly plate 21 and left butterfly plate 22 are pressed in plunger 311 ends; plunger 311 non-external part hydraulic oil can only flow back in the air-bag type accumulator 3211 by adjustment stream valve 3222; right butterfly plate 21 and left butterfly plate 22 are closed slowly; eliminate or the minimizing water hammer protection pipeline and the effect that prevents the water pump reversing thereby reach.
Slowly close the time of section, can adjust by adjustment stream valve 3222, this time can be adjustable second to 5-15 from zero.
A kind of bivalve formula hydro-cushion buffer valve that the utility model provides, plunger two ends in its oil hydraulic cylinder damping device are subjected to identical pressure, pressure spring on the plunger is used to overcome the frictional force that plunger stretches out oil cylinder, under the effect of balance pressure and pressure spring power, this kind device could not be subjected to the influence of medium working pressure, as long as in the rated working pressure scope, move, comprise the low pressure operation point, described device can make safety check follow procedure realization two stages of speed close, thereby reaches elimination or reduce water hammer.In addition, the oil hydraulic cylinder damping device is arranged on the left and right outside of later half valve body with releasable connection, and peep hole is arranged on the oil hydraulic cylinder, and the rubber collision block is arranged on the butterfly plate.Adopt after the said structure, mounting or dismounting and maintenance are convenient, and Strike note is little.
Claims (4)
1, a kind of bivalve formula hydro-cushion buffer valve comprises valve means, bivalve butterfly plate device and oil hydraulic cylinder damping device; It is characterized in that,
Described valve means comprises preceding half valve body (11), later half valve body (12) and valve seat (13);
Described preceding half valve body (11) and later half valve body (12) combine with releasable connection by being vertical mating face with axis, and described valve seat (13) is arranged between preceding half valve body (11) and the later half valve body (12);
Described bivalve butterfly plate device is arranged in preceding half valve body (11), and it comprises right butterfly plate (21), left butterfly plate (22), fixing major axis (23); Described right butterfly plate (21) and left butterfly plate (22) are installed in fixedly on the major axis (23);
Also be respectively arranged with disconnectable rubber collision block (211) on described right butterfly plate (21) and the left butterfly plate (22);
Described oil hydraulic cylinder damping device (3) is separately positioned on the left and right outside of later half valve body (12) with releasable connection, and it comprises hydraulic cylinder device and hydraulic damping device;
Described hydraulic cylinder device comprises plunger (311) and oil hydraulic cylinder (312); Front end of this plunger (311) and corresponding rubber collision block (211) collision;
Described hydraulic damping device comprises air-bag type accumulator (3211), one-way valve (3221) and adjusts stream valve (3222).
2, bivalve formula hydro-cushion buffer valve as claimed in claim 1 is characterized in that described oil hydraulic cylinder (312) is with the diameter plunger piston fluid pressure cylinder.
3, bivalve formula hydro-cushion buffer valve as claimed in claim 1 is characterized in that described oil hydraulic cylinder (312) also comprises a watch window (3121).
4, bivalve formula hydro-cushion buffer valve as claimed in claim 1 is characterized in that, described hydraulic cylinder device also comprises one can overcome the pressure spring (313) that plunger (311) stretches out the frictional force of oil hydraulic cylinder (312); The one end is connected with the inner bottom part of oil hydraulic cylinder (312); The other end connects described plunger (311).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420023339 CN2800009Y (en) | 2004-06-02 | 2004-06-02 | Bivalve type hydraulic balancing and slowly closing check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420023339 CN2800009Y (en) | 2004-06-02 | 2004-06-02 | Bivalve type hydraulic balancing and slowly closing check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2800009Y true CN2800009Y (en) | 2006-07-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420023339 Expired - Fee Related CN2800009Y (en) | 2004-06-02 | 2004-06-02 | Bivalve type hydraulic balancing and slowly closing check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2800009Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103282715A (en) * | 2010-12-06 | 2013-09-04 | Mib意大利股份公司 | Control valve for separable connection unit for flexible pipes. |
| CN115342211A (en) * | 2021-05-13 | 2022-11-15 | 中核苏阀科技实业股份有限公司 | Micro-resistance slow-closing swing check valve with energy accumulator |
-
2004
- 2004-06-02 CN CN 200420023339 patent/CN2800009Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103282715A (en) * | 2010-12-06 | 2013-09-04 | Mib意大利股份公司 | Control valve for separable connection unit for flexible pipes. |
| CN103282715B (en) * | 2010-12-06 | 2015-04-01 | Mib意大利股份公司 | Control valve for separable connection unit for flexible pipes. |
| CN115342211A (en) * | 2021-05-13 | 2022-11-15 | 中核苏阀科技实业股份有限公司 | Micro-resistance slow-closing swing check valve with energy accumulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060726 |