CN106870815B - Balance type direct-acting water attack relief valve - Google Patents
Balance type direct-acting water attack relief valve Download PDFInfo
- Publication number
- CN106870815B CN106870815B CN201710159051.2A CN201710159051A CN106870815B CN 106870815 B CN106870815 B CN 106870815B CN 201710159051 A CN201710159051 A CN 201710159051A CN 106870815 B CN106870815 B CN 106870815B
- Authority
- CN
- China
- Prior art keywords
- valve
- spring
- cylinder
- piston
- cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Classifications
-
- 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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a balanced direct-acting water hammer relief valve, wherein a sleeve (3) is arranged on a valve seat (2) in a valve body (1), the sleeve (3) is positioned through a valve cover (9), an overflowing hole for communicating an inlet end (1.1) with an outlet end (1.2) is formed in the side wall of the sleeve (3) close to one end of the valve seat (2), an adjusting cylinder (4) which is sealed corresponding to the inlet end (1.1) of the valve body (1) is arranged in the sleeve (3), the adjusting cylinder (4) is communicated or cut off the inlet end (1.1) and the outlet end (1.2) when moving up and down, a piston cylinder (7) is arranged on the inner side of the valve cover (9) close to the valve body (1), a piston (6) is arranged in the piston cylinder (7), the adjusting cylinder (4) is connected with the piston (6) through the valve rod (5), one end of a communicating pipe (8) is connected with the valve rod (5), and the other end of the communicating pipe extends out of the valve cover (9) and is connected with a buffer device. The invention has the advantages of being capable of adapting to the working conditions of large caliber and high pressure, being capable of being rapidly opened in real time when water hammer occurs, being capable of stably, controllably and slowly closing after pressure relief is finished, and being capable of ensuring safe and effective operation of a pipe network system.
Description
Technical Field
The invention relates to a valve, in particular to a water hammer direct-acting relief valve with a balance sleeve structure.
Background
In the operation of a pipe network system, particularly a long-distance pipe network system, the risk of water hammer caused by sudden change of pressure in a pipeline exists, the water hammer has destructive power on pipe network equipment, and the propagation speed is high and is close to the propagation speed of sound waves in water. In the prior art, a valve for pipe network water hammer protection mostly adopts a pilot type structural form of a main valve and a pilot valve, and the pilot valve drives the main valve to move backwards during operation, so that the main valve is opened, drained and depressurized, the real-time immediate opening cannot be realized, and the water hammer damage risk exists. The spring direct action type is adopted, the operation is sensitive, the reaction is rapid, but the spring is directly acted on the valve plate, the valve is only suitable for the working conditions of low pressure and small caliber, when the system pressure is high and the valve caliber is large, a plurality of robust springs are needed, the structure is heavy, the multi-spring linkage is poor in adjustability, and the valve can hardly be produced when the caliber is larger.
Disclosure of Invention
The invention aims to solve the technical problem of providing a balanced direct-acting water hammer relief valve which can adapt to the working conditions of large caliber and high pressure, can quickly react in real time when water hammer occurs, has sensitive action and ensures the safe and effective operation of a pipe network system.
In order to solve the technical problem, the balance type direct-acting water hammer relief valve provided by the invention comprises a valve body and a valve cover, wherein a valve seat is arranged between an inlet end and an outlet end of the valve body, a sleeve is arranged on the valve seat in the valve body and is positioned through the valve cover, an overflowing hole for communicating the inlet end and the outlet end is formed in the side wall of one end, close to the valve seat, of the sleeve, an adjusting cylinder which is sealed corresponding to the inlet end of the valve body is arranged in the sleeve, the adjusting cylinder is communicated or cut off with the overflowing hole to communicate or cut off the inlet end and the outlet end when moving up and down, a piston cylinder is arranged on the inner side of the valve cover close to the valve body, a piston is arranged in the piston cylinder, the adjusting cylinder is connected with the piston through a valve rod, one end of a communicating pipe is connected with the valve rod, and the other end of the communicating pipe penetrates through the valve cover and extends out of the outer side of the valve cover to be connected with a buffer device.
And an indicating rod penetrating through the buffer device is arranged at the top end of the communicating pipe.
The structure of the buffer device is as follows: the outer side of the valve cover is provided with a spring cylinder, a spring seat, a spring cover and a spring arranged between the spring seat and the spring cover are arranged in the spring cylinder, the spring seat is arranged on a communicating pipe penetrating through the valve cover, the top end of the spring cylinder is provided with an adjusting solenoid, the adjusting solenoid penetrates through one end of the spring cylinder to be in contact with the spring cover, and the other end of the spring cylinder is exposed out of the spring cylinder and is provided with a locking nut.
The side wall of the communicating pipe is provided with a first vent hole at the end close to the piston, a second vent hole at the end close to the spring cover, and the cavity a above the piston is communicated with the cavity b above the spring seat in the spring cylinder through the communicating pipe and the first vent hole and the second vent hole which are arranged on the communicating pipe.
And a sealing ring is arranged between the spring seat and the inner wall of the spring cylinder.
The cavity c above the valve cover and below the spring seat is connected with a one-way valve through a third air vent arranged at the end, close to the valve cover, of the spring cylinder and is connected with a regulating valve needle valve through a fourth air vent, and the cavity b above the spring seat is communicated with the atmosphere through a fifth air vent arranged at the upper part of the spring cylinder.
The overflowing hole is a V-shaped overflowing hole.
The inlet end of the valve body is set to be an inverted cone-shaped flow channel with an included angle of R, so that the inner diameter of the sleeve is larger than the nominal size of the valve.
The adjusting cylinder, the piston cylinder and the spring cylinder are all positioned on the same central axis of the valve body middle cavity.
The valve body adopts an angle type or is designed into a straight-through type.
According to the balance type direct-acting water hammer relief valve adopting the technical scheme, the piston drives the adjusting cylinder to open and close, the piston directly contacts with a medium towards the valve body side, the upper part of the piston is communicated with the atmosphere through the communicating pipe and the upper cavity of the spring cylinder, the spring directly acts on the piston through the communicating pipe, namely, the pressure of the spring is directly compared with the pressure of the medium through the piston, the spring force can be set through the adjusting solenoid, once the pressure exceeds the set value of the spring, the piston pushes the spring seat to move upwards through the communicating pipe, the spring is rapidly compressed, the check valve connected with the cavity c below the spring seat is opened, air is rapidly sucked into the cavity c, the piston simultaneously drives the adjusting cylinder to synchronously move upwards and open, and the valve acts rapidly and sensitively. After pressure relief is completed, the spring pushes the spring seat and the adjusting cylinder to move downwards, the one-way valve connected with the cavity c below the spring seat is closed, air is discharged slowly in a controllable mode through the adjusting needle valve, the valve is closed slowly, and valve closing water hammer is prevented from being generated by the valve closing water hammer.
The cylindrical regulating cylinder is used as the opening and closing part, the cylindrical regulating cylinder has no blind plate thrust, small running resistance and small opening and closing moment, and the valve can be driven to act by adopting smaller piston area and spring force.
The thrust of the spring can be adjusted by rotating the adjusting solenoid through the spring cover, and the adjusting solenoid is locked by the locking nut after reaching a set value.
The top end of the communicating pipe is provided with an indicating rod which penetrates through the adjusting solenoid, and the indicating rod is used for displaying the opening degree of the valve.
Meanwhile, the V-shaped overflowing hole in the sleeve enables the opening degree of the valve to be in a linear relation with the flow, so that the flow of the valve in the opening and closing operation is stable, and the frequency jump phenomenon of the pressure release valve is avoided.
The inlet end of the valve body is provided with the inverted cone-shaped flow channel with the included angle of R, so that the flow channel of the middle cavity is enlarged, the flow area of the whole flow channel can be achieved by the adjusting cylinder under the condition of small movement amount and small compression amount of the spring, the adjustable range of the pressure relief value of the valve can be effectively increased, and the service life of the spring is prolonged.
In conclusion, the balance type direct-acting water hammer relief valve can adapt to the working conditions of large caliber and high pressure, can be quickly opened in real time when water hammer happens, can be stably, controllably and slowly closed after pressure relief is finished, is sensitive in action and adjustable in action pressure, and can guarantee safe and effective operation of a pipe network system.
Drawings
Fig. 1 is a schematic structural view of a balanced direct-acting water hammer relief valve.
Fig. 2 is a schematic view of the sleeve structure.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
Referring to fig. 1 and 2, a balanced direct-acting water hammer relief valve, a valve body 1 is of an angle type or a straight-through type, a valve seat 2 is arranged between an inlet end 1.1 and an outlet end 1.2 of the valve body 1, a sleeve 3 is arranged on the valve seat 2 through a flange hole in the valve body 1, the sleeve 3 is positioned through a valve cover 9 arranged on a flange in the valve body, the inlet end 1.1 and the outlet end 1.2 of the valve body 1 are communicated through a V-shaped overflowing hole 3.1 arranged on the side wall of one end, close to the valve seat 2, of the sleeve 3, an adjusting cylinder 4 sealed corresponding to the inlet end 1.1 of the valve body 1 is arranged in the sleeve 3, the adjusting cylinder 4 is a cylindrical component communicated up and down, the V-shaped overflowing hole 3.1 on the sleeve 3 can be communicated or cut off to communicate or cut off the inlet end 1.1 and the outlet end 1.2 of the valve body 1 when the adjusting cylinder 4 moves up and down, a piston cylinder 7 is arranged on the inner side of the valve cover 9 close to the valve body 1, a piston 6 is arranged in a piston cylinder 7, a sealing ring 19 is arranged between the piston 6 and the piston cylinder 7, an adjusting cylinder 4 is connected with the piston 6 through a valve rod 5, one end of a communicating pipe 8 is connected with the valve rod 5, the other end of the communicating pipe passes through a valve cover 9 and extends out of the outer side of the valve cover 9, a spring cylinder 17 is arranged on the outer side of the valve cover 9, the adjusting cylinder 4, the piston cylinder 7 and the spring cylinder 17 are all located on the same central axis of a middle cavity of the valve body 1, a spring seat 11, a spring cover 14 and a spring 12 installed between the spring seat 11 and the spring cover 14 are arranged in the spring cylinder 17, the spring seat 11 is installed on the communicating pipe 8 which passes through the valve cover 9, an adjusting solenoid 15 is arranged at the top end of the spring cylinder 17, the adjusting solenoid 15 passes through one end of the spring cylinder 17 and is in contact with the spring cover 14, and the other end of the adjusting solenoid 15 is exposed out of the spring cylinder 17 and is provided with a locking nut 16.
The inlet end 1.1 of the valve body 1 is arranged to be an inverted cone-shaped flow channel with an included angle R, so that the inner diameter of the sleeve 3 is larger than the nominal size of the valve, and the valve can realize the full flow channel area under a smaller opening degree.
The thrust of the spring 12 can be adjusted by rotating the adjusting screw 15 through the spring cover 14, and the position of the adjusting screw 15 is locked by the locking nut 16 after the set value is reached.
An indicating rod 13 penetrating through an adjusting solenoid 15 is installed at the top end of the communicating pipe 8, and the indicating rod 13 is used for displaying the opening degree of the valve.
The side wall of the communicating pipe 8 is provided with a first vent hole 8.1 near the end of the piston 6 and a second vent hole 8.2 near the end of the indicating rod 13, and the cavity a above the piston 6 is communicated with the cavity b above the spring seat 11 in the spring cylinder 17 through the communicating pipe 8 and the first vent hole 8.1 and the second vent hole 8.2 arranged on the communicating pipe.
In the spring cylinder 17, a sealing ring is arranged between the spring seat 11 and the inner wall of the spring cylinder 17, a cavity c above the valve cover 9 and below the spring seat 11 is connected with a one-way valve 10 through a third vent hole 17.2 formed in the spring cylinder 17 close to the end of the valve cover 9 and is connected with a regulating valve needle valve 18 through a fourth vent hole 17.3, and a cavity b above the spring seat 11 is communicated with the atmosphere through a fifth vent hole 17.1 in the upper part of the spring cylinder 17.
Referring to fig. 1 and 2, the working principle of the present invention is:
firstly, the thrust of the spring 12 is set through the adjusting solenoid 15 according to the requirement of working conditions, and when the thrust of the medium at the inlet end 1.1 of the valve body 1 on the piston 6 is smaller than the set value of the spring 12, the valve is in a closed state.
Opening a valve: when the thrust of the medium at the inlet end 1.1 of the valve body 1 acting on the piston 6 is greater than the set value of the spring 12, the medium pushes the piston 6 to move upwards, the piston 6 pushes the communicating pipe 8 to move upwards, the communicating pipe 8 pushes the spring seat 11 to compress the spring 12, the air in the upper cavity a of the piston 6 enters the upper cavity b of the spring seat 11 through the communicating pipe 8 and the first vent hole 8.1 and the second vent hole 8.2 thereof and is discharged to the atmosphere through the fifth vent hole 17.1 at the upper part of the spring cylinder 17, the lower cavity c of the spring seat 11 sucks the air through the one-way valve 10 connected with the third vent hole 17.2, meanwhile, the piston 6 drives the adjusting cylinder 4 to move upwards through the valve rod 5, the adjusting cylinder 4 moves upwards to leave the V-shaped vent hole 3.1 on the sleeve 3 to communicate the inlet end 1.1 and the outlet end 1.2 of the valve body 1, the valve is opened, and the medium flows into the outlet end 1.2 through the V-shaped vent hole 3 on the sleeve 3, so as to realize the drainage and pressure reduction.
Closing the valve: when the medium pressure of the inlet end 1.1 of the valve body 1 is reduced, the thrust force acting on the piston 6 is smaller than the set value of the spring 12, the spring 12 pushes the communicating pipe 8 to move downwards through the spring seat 11, the one-way valve 10 communicated with the lower cavity C of the spring seat 11 through the third vent hole 17.2 is closed, air in the cavity C can only be discharged controllably through the adjusting needle valve 18 connected with the communicating pipe through the fourth vent hole 17.3, meanwhile, the communicating pipe 8 pushes the piston 6, the piston 6 drives the adjusting cylinder 4 to move downwards through the valve rod 5, and the adjusting cylinder 4 moves downwards to cut off the V-shaped vent hole 3.1 on the sleeve 3 to cut off the inlet end 1.1 and the outlet end 1.2 of the valve body 1, so that the valve can be closed controllably.
Referring to fig. 1 and 2, the adjusting cylinder 4, the piston cylinder 7 and the spring cylinder 17 are all located on the same central axis of the cavity of the valve body 1, the piston 6 in the piston cylinder 7 drives the adjusting cylinder 4 to open and close through the valve rod 5, the piston 6 is connected with the spring seat 11 through the connecting pipe 8, so that the thrust of the spring 12 on the spring seat 11 can be directly compared with the medium pressure through the piston 6, once the pressure exceeds the set value of the spring 12, the piston 6 pushes the spring seat 11 to move upwards through the communicating pipe 8, the spring 12 is rapidly compressed, the piston 6 drives the adjusting cylinder 4 to move upwards synchronously to open the valve, and the valve action is rapid and sensitive. After pressure relief is finished, the spring 12 pushes the spring seat 11 and the adjusting cylinder 4 to move downwards, an outward adjusting needle valve 18 is arranged in a cavity c below the spring seat 11, air in the cavity c can be discharged slowly in a controllable mode, slow closing of the valve is achieved, and valve closing water hammer is prevented from being generated. The invention has the advantages of being capable of adapting to the working conditions of large caliber and high pressure, being capable of being rapidly opened in real time when water hammer occurs, being capable of stably, controllably and slowly closing after pressure relief is finished, and being capable of ensuring safe and effective operation of a pipe network system.
Claims (6)
1. The utility model provides a balanced type direct action type water hammer relief valve, includes valve body (1) and valve gap (9), entrance point (1.1) and exit end (1.2) of valve body (1) between be equipped with disk seat (2), characterized by: the valve comprises a valve body (1), a valve seat (2) and a sleeve (3) are arranged on the valve seat (2) in the valve body (1), the sleeve (3) is positioned through a valve cover (9), the side wall, close to one end of the valve seat (2), of the sleeve (3) is provided with an overflowing hole for communicating the inlet end (1.1) with the outlet end (1.2), the sleeve (3) is internally provided with an adjusting cylinder (4) which is sealed corresponding to the inlet end (1.1) of the valve body (1), the adjusting cylinder (4) is communicated or cut off by the overflowing hole to communicate or cut off the inlet end (1.1) and the outlet end (1.2) when moving up and down, a piston cylinder (7) is arranged on the inner side, close to the valve body (1), of the valve cover (9), a piston (6) is arranged in the piston cylinder (7), the adjusting cylinder (4) is connected with the piston (6) through a valve rod (5), one end of a communicating pipe (8) is connected with the valve rod (5), and the other end of the valve cover (9) extends out of the outer side of the valve cover (9) to the outside of a buffer device;
the structure of the buffer device is as follows: a spring cylinder (17) is arranged on the outer side of the valve cover (9), a spring seat (11), a spring cover (14) and a spring (12) arranged between the spring seat (11) and the spring cover (14) are arranged in the spring cylinder (17), the spring seat (11) is arranged on a communicating pipe (8) penetrating through the valve cover (9), an adjusting solenoid (15) is arranged at the top end of the spring cylinder (17), the adjusting solenoid (15) penetrates through one end of the spring cylinder (17) to be in contact with the spring cover (14), and the other end of the adjusting solenoid is exposed out of the spring cylinder (17) and is provided with a locking nut (16);
an indication rod (13) penetrating through the buffer device is arranged at the top end of the communicating pipe (8); the indicating rod (13) passes through the adjusting screw tube (15);
a first vent hole (8.1) is formed in the side wall of the communicating pipe (8) and close to the end of the piston (6), a second vent hole (8.2) is formed in the end of the side wall of the communicating pipe (8) and close to the spring cover (14), and the cavity a above the piston (6) is communicated with the cavity b above the spring seat (11) in the spring cylinder (17) through the communicating pipe (8) and the first vent hole (8.1) and the second vent hole (8.2) formed in the communicating pipe;
the cavity c below the spring seat (11) is communicated with the atmosphere through a third vent hole (17.2) formed in the end of the valve cover (9) and connected with a one-way valve (10) and a regulating valve needle valve (18) through a fourth vent hole (17.3) by the spring cylinder (17), and the cavity b above the spring seat (11) is communicated with the atmosphere through a fifth vent hole (17.1) in the upper part of the spring cylinder (17).
2. The balanced, direct-acting, water hammer relief valve of claim 1, wherein: and a sealing ring is arranged between the spring seat (11) and the inner wall of the spring cylinder (17).
3. The balanced direct-acting water hammer relief valve according to claim 1 or 2, wherein: the overflowing hole is a V-shaped overflowing hole (3.1).
4. The balanced direct-acting water hammer relief valve according to claim 1 or 2, wherein: the inlet end (1.1) of the valve body (1) is arranged into an inverted cone-shaped flow channel with an included angle of R, so that the inner diameter of the sleeve (3) is larger than the nominal size of the valve.
5. The balanced, direct-acting, water hammer relief valve according to claim 1 or 2, wherein: the adjusting cylinder (4), the piston cylinder (7) and the spring cylinder (17) are all positioned on the same central axis of the middle cavity of the valve body (1).
6. The balanced direct-acting water hammer relief valve according to claim 1 or 2, wherein: the valve body (1) adopts an angle type or is designed into a straight-through type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710159051.2A CN106870815B (en) | 2017-03-17 | 2017-03-17 | Balance type direct-acting water attack relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710159051.2A CN106870815B (en) | 2017-03-17 | 2017-03-17 | Balance type direct-acting water attack relief valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106870815A CN106870815A (en) | 2017-06-20 |
| CN106870815B true CN106870815B (en) | 2022-12-20 |
Family
ID=59172373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710159051.2A Active CN106870815B (en) | 2017-03-17 | 2017-03-17 | Balance type direct-acting water attack relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106870815B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488469A (en) * | 2018-05-17 | 2018-09-04 | 南通东方船用设备制造有限公司 | Single-acting spring reset pressure balance type pneumatic actuator |
| CN108468856A (en) * | 2018-05-18 | 2018-08-31 | 南通东方船用设备制造有限公司 | Single-acting air spring pneumatic actuator |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB809531A (en) * | 1954-11-05 | 1959-02-25 | English Electric Co Ltd | Improvements in and relating to constant mass flow air valves |
| CN201339738Y (en) * | 2008-11-07 | 2009-11-04 | 湖南湘天源阀门制造有限公司 | Hydraulic control membrane type pressure regulator with high step-down ratio |
| CN101709799A (en) * | 2009-11-30 | 2010-05-19 | 湖南泵阀制造有限公司 | Multifunctional sleeve type energy dissipation valve |
| CN202203418U (en) * | 2011-09-14 | 2012-04-25 | 刘工勤 | Opening and closing valve with balance piston |
| CN202431993U (en) * | 2012-02-04 | 2012-09-12 | 浙江科海仪表有限公司 | Self-operated sleeve adjusting valve |
| CN103047457A (en) * | 2012-12-19 | 2013-04-17 | 武汉大禹阀门股份有限公司 | Water hammer discharge valve |
| CN203431207U (en) * | 2013-09-09 | 2014-02-12 | 大英县大科机械设备制造有限公司 | Bidirectional balancing program control valve |
| WO2014094599A1 (en) * | 2012-12-19 | 2014-06-26 | 武汉大禹阀门股份有限公司 | Water hammer discharge valve |
| CN203784387U (en) * | 2014-04-23 | 2014-08-20 | 刘工勤 | Micro-force switch valve with stop function |
| CN206545734U (en) * | 2017-03-17 | 2017-10-10 | 湖南泵阀制造有限公司 | Balanced type Direct Action Type water attack release valve |
-
2017
- 2017-03-17 CN CN201710159051.2A patent/CN106870815B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB809531A (en) * | 1954-11-05 | 1959-02-25 | English Electric Co Ltd | Improvements in and relating to constant mass flow air valves |
| CN201339738Y (en) * | 2008-11-07 | 2009-11-04 | 湖南湘天源阀门制造有限公司 | Hydraulic control membrane type pressure regulator with high step-down ratio |
| CN101709799A (en) * | 2009-11-30 | 2010-05-19 | 湖南泵阀制造有限公司 | Multifunctional sleeve type energy dissipation valve |
| CN202203418U (en) * | 2011-09-14 | 2012-04-25 | 刘工勤 | Opening and closing valve with balance piston |
| CN202431993U (en) * | 2012-02-04 | 2012-09-12 | 浙江科海仪表有限公司 | Self-operated sleeve adjusting valve |
| CN103047457A (en) * | 2012-12-19 | 2013-04-17 | 武汉大禹阀门股份有限公司 | Water hammer discharge valve |
| WO2014094599A1 (en) * | 2012-12-19 | 2014-06-26 | 武汉大禹阀门股份有限公司 | Water hammer discharge valve |
| CN203431207U (en) * | 2013-09-09 | 2014-02-12 | 大英县大科机械设备制造有限公司 | Bidirectional balancing program control valve |
| CN203784387U (en) * | 2014-04-23 | 2014-08-20 | 刘工勤 | Micro-force switch valve with stop function |
| CN206545734U (en) * | 2017-03-17 | 2017-10-10 | 湖南泵阀制造有限公司 | Balanced type Direct Action Type water attack release valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106870815A (en) | 2017-06-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110645389B (en) | Pilot operated safety valve | |
| CN108708999B (en) | Low-pressure pilot-operated safety valve | |
| CN111981169B (en) | Pilot operated safety valve for urban gas | |
| CN111981168A (en) | Pilot operated safety valve | |
| CN109973694B (en) | Explosion tube cut-off valve | |
| CN106870815B (en) | Balance type direct-acting water attack relief valve | |
| CN208252839U (en) | Check-valves | |
| CN202790736U (en) | Plunger type safety valve | |
| CN206708536U (en) | Compact Direct Action Type water attack release valve | |
| CN205315784U (en) | Waterproof hammer butterfly check valve of mechanical type | |
| CN114688264A (en) | Electromagnetic gas emergency cut-off valve capable of being opened under pressure | |
| CN110725959B (en) | Multifunctional Butterfly Valve for Steam Turbine | |
| CN208281515U (en) | A kind of buffer butterfly valve with multistage adjustable damping device | |
| CN204592328U (en) | The micro-pump control valve that blocks water of a kind of swash plate | |
| CN210950060U (en) | Ultrahigh pressure hydraulic safety valve | |
| CN202074045U (en) | Diaphragm-type quick-opening mud-discharging valve | |
| CN215908482U (en) | Marine hydraulic damping formula water hammer subducts valve | |
| CN201007292Y (en) | Large flow electro-hydraulic control valve | |
| CN210949914U (en) | Multifunctional butterfly valve for steam turbine | |
| CN209540133U (en) | A kind of double membrane configurations hold pressure pressure release control pilot valve | |
| CN110043703B (en) | Design method of piston type pilot water hammer relief valve | |
| CN201764046U (en) | Self-operated flat safety stop valve with damping device | |
| CN218236275U (en) | water hammer relief valve | |
| CN214305408U (en) | Stacked three-way pilot control pressure reducing valve | |
| CN212960042U (en) | Pilot valve structure of pilot operated safety valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |