CN108612882B - Dual-check diaphragm check valve - Google Patents
Dual-check diaphragm check valve Download PDFInfo
- Publication number
- CN108612882B CN108612882B CN201810635915.8A CN201810635915A CN108612882B CN 108612882 B CN108612882 B CN 108612882B CN 201810635915 A CN201810635915 A CN 201810635915A CN 108612882 B CN108612882 B CN 108612882B
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- diaphragm
- valve body
- valve
- oil
- check
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- 230000009977 dual effect Effects 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims description 36
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000013016 damping Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 description 22
- 239000007788 liquid Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
- F16K15/066—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring with a plurality of valve members
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
- F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
-
- 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
- F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The utility model provides a diaphragm check valve of dual check relates to the check valve field, includes the inside valve body that is equipped with the funnel-shaped fill opening of lower extreme, installs at the inside diaphragm subassembly of fill opening to and install the lower extreme cover at the valve body lower extreme, the axis of fill opening coincides with the axis of valve body, fill opening bottom is equipped with the step face, step face perpendicular to valve body axis, be equipped with the cylindricality face between the side connection of step face and fill opening, diaphragm upper end structure of diaphragm subassembly is the cylinder, and the lower extreme structure is the round platform, the cylinder structural part of diaphragm is located the cylindricality face, the round platform part of diaphragm is located the inclined plane of fill opening. According to the invention, the cylindrical surface is arranged at the upper end of the diaphragm, and the step surface is arranged at the inner end of the bucket opening, so that the contact area between the diaphragm and the valve cavity of the bucket opening is increased, the upper end of the diaphragm and the valve cavity form a plunger type space at one end, and oil backflow is avoided.
Description
Technical Field
The invention relates to the field of check valves, in particular to a double-check diaphragm check valve.
Background
The check valve is a valve which can automatically open and close the valve clack by means of the flow of oil, and is used for preventing the oil from flowing backwards, and is also called a check valve, a one-way valve, a reverse flow valve and a back pressure valve. The check valve is an automatic valve and has the main functions of preventing oil from flowing backwards, preventing the reverse rotation of the pump and the driving motor and discharging the oil from the container.
The traditional check valve adopts ball valve check more, to some high pipelines of oil pressure, the phenomenon of oil return is difficult to appear to the check effect, and to other diaphragm check valves, because the diaphragm is continuous with the valve pocket inside only to fight the shape side, leads to the diaphragm to be little with the contact surface of valve pocket, and when the oil pressure is too big, the phenomenon of leaking appears easily in the check in-process, influences the check effect.
Disclosure of Invention
The invention aims to solve the problems that the contact area between a diaphragm assembly of a diaphragm check valve and the interior of a valve cavity is small, and oil return phenomenon is easy to occur when the oil pressure is too high.
The utility model provides a dual non return's diaphragm check valve, includes the inside valve body that is equipped with the funnel-shaped fill mouth of lower extreme, installs at the inside diaphragm subassembly of fill mouth to and install the lower extreme at the valve body lower extreme, the axis of fill mouth coincides with the axis of valve body, fill mouth bottom is equipped with the step face, step face perpendicular to valve body axis, be equipped with the cylindricality face between the side connection of step face and fill mouth, the diaphragm upper end structure of diaphragm subassembly is the cylinder, and the lower extreme structure is the round platform, the cylinder structure part of diaphragm is located the cylindricality face, the round platform part of diaphragm is located the inclined plane of fill mouth.
Furthermore, a guide surface is arranged between the step surface and the hollow pipeline connection inside the valve body, a base plate is arranged at the upper end of the diaphragm assembly, and the diameter of the base plate is the same as that of the guide surface.
Further, the lower end of the diaphragm assembly is connected with a first pressure spring, an annular protruding block is arranged in the hollow structure of the inner part of the lower end cover, and the other end of the first pressure spring is arranged on the upper surface of the annular protruding block.
Further, the lower end of the annular convex block is of a concave spherical structure, the steel ball is arranged in the concave spherical structure at the lower end of the annular convex block, the lower end of the steel ball is connected with a second pressure spring, the lower end of the inner part of the lower end cover is connected with a fixing seat with a through hole through threads, and the other end of the second pressure spring is connected with the upper surface of the fixing seat.
Further, the valve body structure is T-shaped, the hollow structures in the left support rod and the right support rod at the upper end of the T-shaped of the valve body are communicated with the hollow structures in the main support rod of the valve body, the valve core is fixed in the main support rod of the valve body along the central axis direction of the main support rod through threaded connection, damping small holes are formed in the valve core, the damping small holes are communicated with the hollow structures in the support rods of the valve body, an oil testing valve cavity is formed in the port of the right support rod, and the oil testing valve core is installed in the oil testing valve cavity in a threaded connection mode.
Further, a sealing gasket is arranged at the joint of the valve body and the lower end cover, and the sealing gasket ring is sleeved at the lower end of the valve body.
Further, the junction of the internal hollow structure of the oil testing valve cavity and the valve body is provided with a funnel-shaped inclined plane, the front end of the oil testing valve core is provided with a conical head, the surface of the conical head is embedded with a rubber layer, the outer surface of the conical head is connected to the inclined plane of the oil testing valve cavity, and the rear end of the conical head of the oil testing valve core is provided with an oil outlet loop along the central axis direction of the oil testing valve.
A double-check diaphragm check valve, which works in the following principle:
The oil has the valve body upper end to get into the check valve, and the oil passes through the diaphragm subassembly, promotes the steel ball motion, and the oil can flow from the valve body inside this moment, and when the oil pressure of bottom end cover bottom was higher than the inside oil pressure of valve body, the inside second pressure spring of bottom end cover upwards promoted the steel ball, realizes first heavy check effect, because diaphragm subassembly lower extreme installs second pressure spring, diaphragm subassembly upward movement realizes the heavy check effect of second in the fill mouth department of valve body lower extreme under the effect of second pressure spring, simple structure, and backflow prevention effect is good.
The beneficial effects of the invention are as follows:
according to the invention, the cylindrical surface is arranged at the upper end of the diaphragm, and the step surface is arranged at the inner end of the bucket opening, so that the contact area between the diaphragm and the valve cavity of the bucket opening is increased, the upper end of the diaphragm and the valve cavity form a plunger type space at one end, and oil backflow is avoided.
The side surface of the hollow structure in the lower end cover is provided with the annular protruding blocks, the lower end cover is divided into two pieces to form a diaphragm cavity and a ball valve groove respectively, a double check effect is formed through the ball valve and the diaphragm assembly, the check effect on oil liquid is good, and the phenomenon is avoided.
The valve core is installed to the valve body upper end, and the inside each hollow structure that is equipped with damping aperture intercommunication valve body of valve core, and the damping aperture can realize controlling the effect of pressure current limiting, prevents that the high pressure of valve body side from influencing first pressure spring and second pressure spring's result of use, and the case adopts threaded connection with the valve body, conveniently clears up the greasy dirt of valve body inside.
The sealing gasket is arranged at the joint of the valve body and the lower end cover, so that the tightness of the device is improved, and the leakage is prevented.
The valve body structure is set to the T font, installs the oil testing valve in the right branch pole department of its T font structure, when needs detect fluid, conveniently detects.
The rubber layer is inlaid on the contact surface between the front end of the oil testing valve and the valve body, so that the tightness is improved, and oil leakage is prevented when the oil testing valve is closed.
The invention has simple structure and is convenient for popularization.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a diagram of the structure of the oil test valve core of the present invention;
FIG. 3 is an enlarged schematic view of portion A of FIG. 1 in accordance with the present invention;
In the figure: 1. a valve body; 2. a diaphragm assembly; 3. a lower end cap; 12. a bucket opening; 13. a step surface; 14. a cylindrical surface; 15. a hollow pipe; 16. a guide surface; 17. a first pressure spring; 18. an annular bump; 21. a membrane; 22. a backing plate; 31. steel balls; 32. a second pressure spring; 33. a fixing seat; 101. a left strut; 102. a right strut; 103. a main support rod; 104. a valve core; 105. damping pinholes; 106. an oil testing valve chamber; 107. a sealing gasket; 108. an oil testing valve core; 201. a conical head; 202. a rubber layer; 203. and (5) an oil outlet loop.
Detailed Description
The technical means, the creation characteristics, the achievement of the purpose and the effect of the present invention achieved are easy to understand, and the present invention is further described below with reference to the specific drawings.
Example 1
On the basis of fig. 1, as shown in fig. 3; the utility model provides a dual non return's diaphragm check valve, including the inside valve body 1 that is equipped with funnel-shaped fill opening 12 of lower extreme, install at the inside diaphragm subassembly 2 of fill opening 12, and install the lower extreme 3 at valve body 1 lower extreme, the axis coincidence of fill opening 12 and the axis of valve body 1, fill opening 12 bottom is equipped with step face 13, step face 13 perpendicular to valve body 1 axis, be equipped with cylindricality face 14 between step face 13 and fill opening 12's side connection, diaphragm 21 upper end structure of diaphragm subassembly 2 is the cylinder, the lower extreme structure is the round platform, the cylinder structure part of diaphragm 21 is located cylindricality face 14, the round platform part of diaphragm 21 is located the inclined plane of fill opening 12.
A guide surface 16 is arranged between the step surface 13 and the hollow pipeline 15 in the valve body 1, a backing plate 22 is arranged at the upper end of the diaphragm assembly 2, and the diameter of the backing plate 22 is the same as that of the guide surface 16. The contact area between the diaphragm assembly and the valve cavity is increased, backflow is prevented, the diaphragm is protected, and the diaphragm is prevented from being damaged due to overhigh oil pressure.
As shown in fig. 1; the lower end of the diaphragm assembly 2 is connected with a first pressure spring 17, an annular protruding block 18 is arranged in the hollow structure of the lower end cover 3, and the other end of the first pressure spring 17 is arranged on the upper surface of the annular protruding block 18. The diaphragm component is pushed to be closed, and the phenomenon that the diaphragm component is not closed due to the fact that the oil pressure difference between the lower end cover and the front end and the rear end of the valve body is not large is avoided.
The lower end of the annular convex block 18 is of a concave spherical structure, the steel ball 31 is arranged in the concave spherical structure at the lower end of the annular convex block 18, the lower end of the steel ball 31 is connected with the second pressure spring 32, the lower end of the inner part of the lower end cover 3 is connected with the fixing seat 33 with a through hole through threads, and the other end of the second pressure spring 32 is connected with the upper surface of the fixing seat 33. The ball valve and the diaphragm assembly form a double check effect, the check effect on oil is good, and phenomena are avoided.
The joint of the valve body 1 and the lower end cover 3 is provided with a sealing gasket 107, and the sealing gasket 107 is sleeved at the lower end of the valve body 1. The tightness is improved, and oil leakage is prevented when the oil testing valve is closed.
A double-check diaphragm check valve, which works in the following principle:
The oil has the valve body upper end to get into the check valve, and the oil passes through the diaphragm subassembly, promotes the steel ball motion, and the oil can flow from the valve body inside this moment, and when the oil pressure of bottom end cover bottom was higher than the inside oil pressure of valve body, the inside second pressure spring of bottom end cover upwards promoted the steel ball, realizes first heavy check effect, because diaphragm subassembly lower extreme installs second pressure spring, diaphragm subassembly upward movement realizes the heavy check effect of second in the fill mouth department of valve body lower extreme under the effect of second pressure spring, simple structure, and backflow prevention effect is good.
Example 2
On the basis of fig. 1, as shown in fig. 3; the utility model provides a dual non return's diaphragm check valve, including the inside valve body 1 that is equipped with funnel-shaped fill opening 12 of lower extreme, install at the inside diaphragm subassembly 2 of fill opening 12, and install the lower extreme 3 at valve body 1 lower extreme, the axis coincidence of fill opening 12 and the axis of valve body 1, fill opening 12 bottom is equipped with step face 13, step face 13 perpendicular to valve body 1 axis, be equipped with cylindricality face 14 between step face 13 and fill opening 12's side connection, diaphragm 21 upper end structure of diaphragm subassembly 2 is the cylinder, the lower extreme structure is the round platform, the cylinder structure part of diaphragm 21 is located cylindricality face 14, the round platform part of diaphragm 21 is located the inclined plane of fill opening 12.
A guide surface 16 is arranged between the step surface 13 and the hollow pipeline 15 in the valve body 1, a backing plate 22 is arranged at the upper end of the diaphragm assembly 2, and the diameter of the backing plate 22 is the same as that of the guide surface 16. The contact area between the diaphragm assembly and the valve cavity is increased, backflow is prevented, the diaphragm is protected, and the diaphragm is prevented from being damaged due to overhigh oil pressure.
As shown in fig. 1; the lower end of the diaphragm assembly 2 is connected with a first pressure spring 17, an annular protruding block 18 is arranged in the hollow structure of the lower end cover 3, and the other end of the first pressure spring 17 is arranged on the upper surface of the annular protruding block 18. The diaphragm component is pushed to be closed, and the phenomenon that the diaphragm component is not closed due to the fact that the oil pressure difference between the lower end cover and the front end and the rear end of the valve body is not large is avoided.
The lower end of the annular convex block 18 is of a concave spherical structure, the steel ball 31 is arranged in the concave spherical structure at the lower end of the annular convex block 18, the lower end of the steel ball 31 is connected with the second pressure spring 32, the lower end of the inner part of the lower end cover 3 is connected with the fixing seat 33 with a through hole through threads, and the other end of the second pressure spring 32 is connected with the upper surface of the fixing seat 33. The ball valve and the diaphragm assembly form a double check effect, the check effect on oil is good, and phenomena are avoided.
The joint of the valve body 1 and the lower end cover 3 is provided with a sealing gasket 107, and the sealing gasket 107 is sleeved at the lower end of the valve body 1. The tightness is improved, and oil leakage is prevented when the oil testing valve is closed.
A double-check diaphragm check valve, which works in the following principle:
The oil has the valve body upper end to get into the check valve, and the oil passes through the diaphragm subassembly, promotes the steel ball motion, and the oil can flow from the valve body inside this moment, and when the oil pressure of bottom end cover bottom was higher than the inside oil pressure of valve body, the inside second pressure spring of bottom end cover upwards promoted the steel ball, realizes first heavy check effect, because diaphragm subassembly lower extreme installs second pressure spring, diaphragm subassembly upward movement realizes the heavy check effect of second in the fill mouth department of valve body lower extreme under the effect of second pressure spring, simple structure, and backflow prevention effect is good.
On the basis of fig. 1, as shown in fig. 2; the valve body 1 is of a T-shaped structure, the hollow structures in the left support rod 101 and the right support rod 102 at the upper end of the T-shaped structure of the valve body 1 are communicated with the hollow structure in the main support rod 103 of the valve body 1, the valve core 104 is fixed in the main support rod 103 of the valve body 1 along the central axis direction of the main support rod 103 through threaded connection, a damping small hole 105 is formed in the valve core 104, the damping small hole 105 is communicated with the hollow structures in the support rods of the valve body 1, an oil testing valve cavity 106 is formed in the port of the right support rod 102, and the oil testing valve core 108 is installed in the oil testing valve cavity 106 in a threaded connection mode. The damping small hole can play a role in controlling oil pressure, and the performance of the diaphragm assembly is prevented from being influenced by the fact that the oil pressure of the oil inlet is too high.
The junction of the oil testing valve cavity 106 and the hollow structure inside the valve body 1 is provided with a funnel-shaped inclined plane, the front end of the oil testing valve core 108 is provided with a conical head 201, the surface of the conical head 201 is embedded with a rubber layer 202, the outer surface of the conical head 201 is connected to the inclined plane of the oil testing valve cavity 106, and the rear end of the conical head 201 of the oil testing valve 108 is provided with an oil outlet loop 203 along the central axis direction of the oil testing valve core 108.
When the oil liquid is required to be checked, the rubber layer embedded at the front end of the oil testing valve is separated from the valve body by screwing the oil testing valve, and the oil liquid flows out through the oil outlet loop inside the oil testing valve.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides a dual non return's diaphragm check valve, includes valve body (1) that the lower extreme inside was equipped with funnel-shaped fill opening (12), installs diaphragm subassembly (2) inside fill opening (12) to and install bottom end cover (3) at valve body (1) lower extreme, its characterized in that: the central axis of the bucket opening (12) coincides with the central axis of the valve body (1), a step surface (13) is arranged on the bucket opening (12), the step surface (13) is perpendicular to the central axis of the valve body (1), a cylindrical surface (14) is arranged between the step surface (13) and the side surface connection of the bucket opening (12), the upper end structure of a diaphragm (21) of the diaphragm assembly (2) is a cylinder, the lower end structure is a round table, the cylindrical structure part of the diaphragm (21) is positioned on the cylindrical surface (14), and the round table part of the diaphragm (21) is positioned on the inclined surface of the bucket opening (12);
The valve body (1) is of a T-shaped structure, a hollow structure in the left support rod (101) and the right support rod (102) at the upper end of the T-shaped structure of the valve body (1) is communicated with a hollow structure in the main support rod (103) of the valve body (1), a valve core (104) is fixed in the main support rod (103) of the valve body (1) along the axis direction of the main support rod (103) through threaded connection, a damping small hole (105) is formed in the valve core (104), the damping small hole (105) is communicated with the hollow structure in each support rod of the valve body (1), an oil testing valve cavity (106) is formed in the port of the left support rod (101), and an oil testing valve core (108) is installed in the oil testing valve cavity (106) in a threaded connection mode;
a sealing gasket (107) is arranged at the joint of the valve body (1) and the lower end cover (3), and the sealing gasket (107) is sleeved at the lower end of the valve body (1) in a ring mode;
The oil testing valve is characterized in that a funnel-shaped inclined surface is arranged at the joint of the oil testing valve cavity (106) and the inner hollow structure of the valve body (1), a conical head (201) is arranged at the front end of the oil testing valve core (108), a rubber layer (202) is embedded on the surface of the conical head (201), the outer surface of the conical head (201) is connected to the inclined surface of the oil testing valve cavity (106), and an oil outlet loop (203) is arranged at the rear end of the conical head (201) of the oil testing valve core (108) along the central axis direction of the oil testing valve core (108).
2. The dual check diaphragm check valve of claim 1, wherein: the guide surface (16) is arranged between the step surface (13) and the hollow pipeline (15) in the valve body (1), the upper end of the diaphragm assembly (2) is provided with a base plate (22), and the diameter of the base plate (22) is the same as that of the guide surface (16).
3. The dual check diaphragm check valve of claim 2, wherein: the lower end of the diaphragm assembly (2) is connected with a first pressure spring (17), an annular lug (18) is arranged in the hollow structure of the inner part of the lower end cover (3), and the other end of the first pressure spring (17) is arranged on the upper surface of the annular lug (18).
4. A dual check diaphragm check valve according to claim 3, wherein: the lower end of the annular convex block (18) is of a concave spherical structure, a steel ball (31) is arranged in the concave spherical structure at the lower end of the annular convex block (18), the lower end of the steel ball (31) is connected with a second pressure spring (32), the lower end of the inner part of the lower end cover (3) is connected with a fixing seat (33) with a through hole through threads, and the other end of the second pressure spring (32) is connected with the upper surface of the fixing seat (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810635915.8A CN108612882B (en) | 2018-06-20 | 2018-06-20 | Dual-check diaphragm check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810635915.8A CN108612882B (en) | 2018-06-20 | 2018-06-20 | Dual-check diaphragm check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108612882A CN108612882A (en) | 2018-10-02 |
| CN108612882B true CN108612882B (en) | 2024-05-24 |
Family
ID=63665487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810635915.8A Active CN108612882B (en) | 2018-06-20 | 2018-06-20 | Dual-check diaphragm check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108612882B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209295B (en) * | 2018-11-02 | 2023-11-24 | 天津诚泽畅石油技术有限公司 | Underground production and backwashing dual-function valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2289103Y (en) * | 1996-11-21 | 1998-08-26 | 郑晓晋 | Plunger type check valve |
| US6009902A (en) * | 1997-11-12 | 2000-01-04 | Westinghouse Air Brake Company | Dual valve fitting for enabling quick measurement of pressure |
| CN102207215A (en) * | 2010-12-23 | 2011-10-05 | 厦门松霖科技有限公司 | Water-saving non-return valve |
| CN208734951U (en) * | 2018-06-20 | 2019-04-12 | 安徽力威精工机械有限公司 | A kind of diaphragm check-valves of dual non-return |
-
2018
- 2018-06-20 CN CN201810635915.8A patent/CN108612882B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2289103Y (en) * | 1996-11-21 | 1998-08-26 | 郑晓晋 | Plunger type check valve |
| US6009902A (en) * | 1997-11-12 | 2000-01-04 | Westinghouse Air Brake Company | Dual valve fitting for enabling quick measurement of pressure |
| CN102207215A (en) * | 2010-12-23 | 2011-10-05 | 厦门松霖科技有限公司 | Water-saving non-return valve |
| CN208734951U (en) * | 2018-06-20 | 2019-04-12 | 安徽力威精工机械有限公司 | A kind of diaphragm check-valves of dual non-return |
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| Publication number | Publication date |
|---|---|
| CN108612882A (en) | 2018-10-02 |
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