CN105587949A - Non-return valve capable of preventing leakage - Google Patents
Non-return valve capable of preventing leakage Download PDFInfo
- Publication number
- CN105587949A CN105587949A CN201610159415.2A CN201610159415A CN105587949A CN 105587949 A CN105587949 A CN 105587949A CN 201610159415 A CN201610159415 A CN 201610159415A CN 105587949 A CN105587949 A CN 105587949A
- Authority
- CN
- China
- Prior art keywords
- valve body
- seal
- joint
- valves
- check
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 230000002265 prevention Effects 0.000 claims description 17
- 230000006978 adaptation Effects 0.000 claims description 4
- 210000000476 body water Anatomy 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 230000037431 insertion Effects 0.000 abstract 4
- 238000003780 insertion Methods 0.000 abstract 4
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 8
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
- F16L19/0218—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means comprising only sealing rings
-
- 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
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0206—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the collar not being integral with the pipe
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention belongs to the technical field of valves, in particular to a non-return valve capable of preventing leakage. The non-return valve comprises a valve body and a valve element, wherein the valve element is positioned in the valve body; the non-return valve comprises joints which are connected to a pipeline; the two ends of the valve body are provided with insertion slots; the insertion slots are adaptive to the joints; the joints are inserted into the insertion slots; the two ends of the valve body are provided with sealing part grooves; the sealing part grooves are positioned in the bottoms of the insertion slots; a sealing part is arranged between each valve body and each joint; the sealing parts are arranged in the sealing part grooves; the valve body is in planar connection to the sealing parts; the lower end surface of each joint is in contact with the upper end surface of each sealing part, and a chamber is formed between the corresponding lower end surface and the corresponding upper end surface; and the height of each sealing part is greater than the depth of each sealing part groove. The non-return valve is good in sealing effect, and capable of effectively preventing leakage.
Description
Technical field
The invention belongs to valve technology field, be specifically related to a kind of check-valves of Leakage prevention.
Background technology
Check-valves refers to and relies on medium itself to flow and automatic open and close flap, is used for preventing the valve that medium flows backwards, and claims again non-return valve, check valve, reflux valve and counterbalance valve. Check-valves belongs to a kind of automatic valve, and its Main Function is to prevent that medium from flowing backwards, preventing the reversion of pump and drive motor, and the releasing of vessel media.
Connection sealing between current one way stop peturn valve and bellmouth normally realizes by sealing ring, and common have rectangular seal, O-ring seals etc., but still has the possibility of leakage.
Summary of the invention
The present invention is directed to the problems referred to above, a kind of check-valves of Leakage prevention is provided.
The technical solution used in the present invention is as follows: a kind of check-valves of Leakage prevention, comprise valve body, spool, described spool is positioned at valve body, described check-valves comprises joint, described joint is connected on pipeline, described valve body two ends are provided with slot, described slot and described joint adaptation, described joint inserts in slot, described valve body two ends are provided with seal groove, described seal groove is positioned at slot bottom, between described valve body and joint, be provided with seal, described seal is located in seal groove, described valve body is that plane is connected with described seal, the lower surface of described joint and the upper surface of seal contacts and the two between form chamber, described chamber is the space for seal distortion, the height of described seal is greater than the degree of depth of described seal groove.
The lower surface of described joint is inclined-plane, and the upper surface of described seal is plane, between the lower surface of described joint and the upper surface of described seal, has oblique angle.
Outside, described valve body two ends is equipped with screw thread, and described joint is connected with valve body by nut.
One end of described valve body is inlet segment, the other end is water exit end, it between described inlet segment and water exit end, is interlude, described valve body water exit end is provided with spool holder, described spool fixed seating is between described valve body and joint, described seal is enclosed within outside described spool holder, described spool holder is provided with 1 the first through hole and 1 or 1 the second above through hole, described spool comprises valve core rod and valve core head, described valve core rod is through the first through hole, described valve core rod and the first through hole are matched in clearance, and described spool relatively spool holder moves up and down.
Described spool holder and valve body are split.
Described valve core head comprises upper position-arresting flap and lower position-arresting flap, and described lower position-arresting flap and described valve inleting water section are matched in clearance, between described upper position-arresting flap and lower position-arresting flap, are provided with sealing ring, and described sealing ring external diameter is greater than described valve inleting water section internal diameter.
Described valve body interlude internal diameter is greater than valve inleting water section internal diameter, and described valve body interlude and valve inleting water section are chamfered transition, and described upper position-arresting flap diameter is greater than described valve inleting water section internal diameter.
Valve core rod is provided with spring, spring top clamping upper position-arresting flap, and the other end holds out against spool holder.
Described spool is provided with the first spring limiting platform above upper position-arresting flap, and described spool holder is connected one end and is provided with the second spring limiting platform with spring, and described both ends of the spring is enclosed within respectively on the first spring limiting platform and the second spring limiting platform.
Described valve body outside is provided with annular groove.
Beneficial effect of the present invention is as follows: seal is under the extruding up and down of valve body and joint, seal extends to horizontal direction, produce sealing effect, between seal and valve body for plane is connected, can make to be connected between seal and valve body tightr, reduce the delay of liquid. The lower surface of described joint and the upper surface of seal contacts and the two between form chamber, described chamber is the space for seal distortion, can make joint better to seal squeezing effect, allow the scalability of seal realize better, make sealing effectiveness better, prevent that seal from having slip because pressure is too little. Realize the object of check-valves Leakage prevention.
Brief description of the drawings
Fig. 1 is the sectional structure chart of loose-joint non-return valve.
Fig. 2 is the sectional structure chart of valve body.
Fig. 3 is the top view of spool holder.
Fig. 4 is A-A profile in Fig. 3.
Fig. 5,6 is the joint of two kinds of different pipelines of adaptation.
Fig. 7 is valve core structure figure.
Fig. 8 is the sectional structure chart of nut.
Fig. 9 is the top view of nut.
In figure, 1. valve body, 101. inlet segments, 102. interludes, 103. water exit ends, 104. slots, 105. seal groove, 106. annular grooves, 2. spool, 201. valve core rods, 202. upper position-arresting flaps, 203. lower position-arresting flaps, 204. first spring limiting platforms, 3. joint, 301. inclined-planes, 4. nut, 5. spool holder, 501. first through holes, 502. second through holes, 503. second spring limiting platforms, 6. spring, 7. seal, 8. sealing ring.
Specific embodiment
Be a kind of specific embodiment of the present invention below, by reference to the accompanying drawings, the present invention can be described better, wherein said upper-lower position is consistent with accompanying drawing.
A kind of check-valves of Leakage prevention, comprise valve body 1, spool 2, described spool 2 is positioned at valve body 1, described check-valves comprises joint 3, described joint 3 is connected on pipeline, described valve body 1 two ends are provided with slot 104, described slot 104 and described joint 3 adaptations, described joint 3 inserts in slot 104, described valve body 1 two ends are provided with seal groove 105, described seal groove 105 is positioned at slot 104 bottoms, between described valve body 1 and joint 3, be provided with seal 7, described seal 7 is located in seal groove 105, the cross section of described seal 7 is square, described seal 7 upper and lower surfaces are plane, described valve body 1 and described seal 7 are connected for plane, the lower surface of described joint 3 is inclined-plane 301, there is the oblique angle of 5 degree the upper surface of the lower surface of described joint 3 and described seal 7, between the upper surface of the lower surface of described joint 3 and described seal 7, form chamber, described chamber is the deformation space while supplying the deformation of seal pressurized, the height of described seal 7 is greater than the degree of depth of described seal groove 105, when under the extruding up and down of seal at valve body and joint, seal can fill seal groove completely. seal extends to horizontal direction, produce sealing effect, between seal and valve body for plane is connected, can make to be connected between seal and valve body tightr, minimizing liquid delay. the lower surface of joint is inclined-plane, and the deformation space while having for the deformation of seal pressurized between the upper surface of seal, can make joint better to seal squeezing effect, allow seal scalability realize better, make the sealing effectiveness of seal better, also can prevent that seal from having slip because pressure is too little. realize the object of check-valves Leakage prevention.
The lower surface of its center tap can be also sphere or other nonplanar structure, or the upper surface of seal is nonplanar, and the lower surface of joint is plane, between the upper surface of seal and the lower surface of joint, can form the cavity for seal deformation space, but quad seal part is more common comparatively speaking, can reduce costs, more easily process with respect to other nonplanar structure and the lower surface of joint is inclined-plane.
Described valve body 1 outside, two ends is equipped with screw thread, and described joint 3 is connected with valve body 1 by nut 4. By jiont treatment on pipeline, can be by modes such as welding, again the valve body that assembles inner body is connected with joint, can realize check-valves by rotary nut simply installs, also be conducive to dismounting, so in use, easily check spool, change seal or directly change check-valves, realize the easy object of maintenance. By rotary nut, also can make joint be connected with valve body tightr, stronger to the squeezing effect of seal, the sealing effectiveness of enhanced leaktightness part.
One end of described valve body is inlet segment 101, the other end is water exit end 103, between described inlet segment 101 and water exit end 103, it is interlude 102, described valve body water exit end 103 is provided with spool holder 5, described spool holder 5 is between described valve body 1 and joint 3, described seal 7 is enclosed within outside described spool holder 5, described spool holder 5 is provided with 501 and 1 of 1 the first through hole or 1 the second above through hole 502, described spool 2 comprises valve core rod 201 and valve core head, described valve core rod 201 is through the first through hole 501, described valve core rod 201 and the first through hole 501 are matched in clearance, described spool 2 relatively spool holder 5 moves up and down. the glide direction of spool can be subject to the restriction of spool holder and move along equidirectional, makes spool return rapid. fluid passes through by the second through hole. described spool holder 5 is split with valve body 1, with respect to one, be conducive to like this installation, maintenance and change parts.
Described valve core head comprises upper position-arresting flap 202 and lower position-arresting flap 203, described lower position-arresting flap 203 is matched in clearance with described valve inleting water section 101, between described upper position-arresting flap 202 and lower position-arresting flap 203, be provided with sealing ring 8, described sealing ring 8 external diameters are greater than described valve inleting water section 101 internal diameters. In the process sliding up and down at spool, open and close with making check-valves coordinating of valve body by lower position-arresting flap and sealing ring.
Described valve body interlude 102 internal diameters are greater than valve inleting water section 101 internal diameters, and described valve body interlude 102 is chamfered transition with valve inleting water section 101, and described upper position-arresting flap 202 diameters are greater than described valve inleting water section 101 internal diameters. The fluid pressure that can prevent adverse current is crossed senior general's spool and is directly released valve body. The diameter of interlude is larger, and when fluid enters interlude from inlet segment, flow velocity slows down, and reduces the infringement to spool.
Valve core rod is provided with spring 6, and spring 6 holds out against upper position-arresting flap 202, and the other end holds out against spool holder 5. Spool adopts spring reset, makes to open and close rapidly.
Described spool 2 is provided with the first spring limiting platform 204 above upper position-arresting flap 202, described spool holder 5 is connected one end and is provided with the second spring limiting platform 503 with spring 6, described both ends of the spring is enclosed within respectively on the first spring limiting platform 204 and the second spring limiting platform 503.
Fluid flows from below to up, and fluid has thrust upwards to valve core head, and in the time that thrust is greater than the thrust of spring, check-valves is in folding condition. When fluid flows from top to down, fluid has downward thrust to valve core head, and spring also has downward thrust to valve core head, makes sealing ring and valve body produce sealing effectiveness, stops fluid to flow, and realizes the effect of non-return.
Described valve body outside is provided with annular groove 106. Can there is anti-skidding effect, be convenient to install.
Wherein, valve body, spool, spring, spool holder, joint, nut are stainless steel and make. Sealing ring is that ethylene propylene diene rubber is made, and ethylene propylene diene rubber has good weatherability, ozone resistance, resistance to water and chemical resistance.
The foregoing is only a kind of embodiment of the present invention, be not used for limiting the scope of the invention; Protection scope of the present invention is limited by the claim in claims, and every equivalence variation and amendment of doing according to invention, all within the protection domain of patent of the present invention.
Claims (10)
1. the check-valves of a Leakage prevention, comprise valve body (1), spool (2), described spool (2) is positioned at valve body (1), it is characterized in that: described check-valves comprises joint (3), described joint (3) is connected on pipeline, described valve body (1) two ends are provided with slot (104), described slot (104) and described joint (3) adaptation, described joint (3) inserts in slot (104), described valve body (1) two ends are provided with seal groove (105), described seal groove (105) is positioned at slot (104) bottom, between described valve body (1) and joint (3), be provided with seal (7), described seal (7) is located in seal groove (105), described valve body (1) and described seal (7) are connected for plane, the upper surface of the lower surface of described joint (3) and seal (7) contact and the two between form chamber, the height of described seal (7) is greater than the degree of depth of described seal groove (105).
2. the check-valves of Leakage prevention according to claim 1, it is characterized in that: the lower surface of described joint (3) is inclined-plane (301), the upper surface of described seal (7) is plane, between the lower surface of described joint (3) and the upper surface of described seal (7), has oblique angle.
3. the check-valves of Leakage prevention according to claim 1, is characterized in that: described valve body (1) outside, two ends is equipped with screw thread, and described joint (3) is connected with valve body (1) by nut (4).
4. the check-valves of Leakage prevention according to claim 1, it is characterized in that: one end of described valve body is inlet segment (101), the other end is water exit end (103), between described inlet segment (101) and water exit end (103), be interlude (102), described valve body water exit end (103) is provided with spool holder (5), described spool holder (5) is positioned between described valve body (1) and joint (3), described seal (7) is enclosed within outside described spool holder (5), described spool holder (5) is provided with 1 the first through hole (501) and 1 or 1 above the second through hole (502), described spool (2) comprises valve core rod (201) and valve core head, described valve core rod (201) is through the first through hole (501), described valve core rod (201) is matched in clearance with the first through hole (501), described spool (2) relatively spool holder (5) moves up and down.
5. the check-valves of Leakage prevention according to claim 4, is characterized in that: described spool holder (5) is split with valve body (1).
6. the check-valves of Leakage prevention according to claim 4, it is characterized in that: described valve core head comprises upper position-arresting flap (202) and lower position-arresting flap (203), described lower position-arresting flap (203) is matched in clearance with described valve inleting water section (101), between described upper position-arresting flap (202) and lower position-arresting flap (203), be provided with sealing ring (8), described sealing ring (8) external diameter is greater than described valve inleting water section (101) internal diameter.
7. the check-valves of Leakage prevention according to claim 6, it is characterized in that: described valve body interlude (102) internal diameter is greater than valve inleting water section (101) internal diameter, described valve body interlude (102) is chamfered transition with valve inleting water section (101), and described upper position-arresting flap (202) diameter is greater than described valve inleting water section (101) internal diameter.
8. the check-valves of Leakage prevention according to claim 6, is characterized in that: valve core rod is provided with spring (6), and spring (6) holds out against upper position-arresting flap (202), and the other end holds out against spool holder (5).
9. the check-valves of Leakage prevention according to claim 8, it is characterized in that: described spool (2) is provided with the first spring limiting platform (204) in upper position-arresting flap (202) top, described spool holder (5) is connected one end and is provided with the second spring limiting platform (503) with spring (6), described both ends of the spring is enclosed within respectively on the first spring limiting platform (204) and the second spring limiting platform (503).
10. the check-valves of Leakage prevention according to claim 1, is characterized in that: described valve body outside is provided with annular groove (106).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610159415.2A CN105587949A (en) | 2016-03-21 | 2016-03-21 | Non-return valve capable of preventing leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610159415.2A CN105587949A (en) | 2016-03-21 | 2016-03-21 | Non-return valve capable of preventing leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105587949A true CN105587949A (en) | 2016-05-18 |
Family
ID=55927745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610159415.2A Pending CN105587949A (en) | 2016-03-21 | 2016-03-21 | Non-return valve capable of preventing leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105587949A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591544A (en) * | 2018-07-17 | 2018-09-28 | 阜宁县中洲阀门有限公司 | A kind of forged steel check-valves |
| CN113301763A (en) * | 2020-06-23 | 2021-08-24 | 阿里巴巴集团控股有限公司 | Liquid cooling rack, data center and edge calculation node |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB677685A (en) * | 1950-08-15 | 1952-08-20 | Well Equipment Mfg Corp | Improvements in or relating to a seal ring or gasket of resilient material for use in a pipe coupling |
| DE2921465A1 (en) * | 1979-05-26 | 1981-01-29 | Seppelfricke Geb Gmbh | Water meter outlet and stop valve screw connection - has collar on stop ledge, and valve cone shaft near disc seal |
| DE29805665U1 (en) * | 1998-03-24 | 1998-06-10 | Kieselmann GmbH, 75438 Knittlingen | Pipe fitting |
| CN1196461A (en) * | 1997-04-02 | 1998-10-21 | 卡明斯发动机公司 | High-pressure sealable connector for pressure sensor |
| CN101275733A (en) * | 2008-05-06 | 2008-10-01 | 黄建聪 | Clip convex type pipeline joint component |
| CN201218371Y (en) * | 2008-05-13 | 2009-04-08 | 王俊忠 | Seal fitting assembly for automobile chassis |
| CN101922574A (en) * | 2010-07-30 | 2010-12-22 | 溧阳市四方不锈钢制品有限公司 | Abacterial check valve |
| CN103090062A (en) * | 2013-01-31 | 2013-05-08 | 马友朝 | One-way valve |
| CN204942637U (en) * | 2015-08-25 | 2016-01-06 | 台州建业阀门有限公司 | A kind of non-return loose joint ball valve |
| CN205424177U (en) * | 2016-03-21 | 2016-08-03 | 温州天悦流体设备科技有限公司 | Prevent check valve of leakage |
-
2016
- 2016-03-21 CN CN201610159415.2A patent/CN105587949A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB677685A (en) * | 1950-08-15 | 1952-08-20 | Well Equipment Mfg Corp | Improvements in or relating to a seal ring or gasket of resilient material for use in a pipe coupling |
| DE2921465A1 (en) * | 1979-05-26 | 1981-01-29 | Seppelfricke Geb Gmbh | Water meter outlet and stop valve screw connection - has collar on stop ledge, and valve cone shaft near disc seal |
| CN1196461A (en) * | 1997-04-02 | 1998-10-21 | 卡明斯发动机公司 | High-pressure sealable connector for pressure sensor |
| DE29805665U1 (en) * | 1998-03-24 | 1998-06-10 | Kieselmann GmbH, 75438 Knittlingen | Pipe fitting |
| CN101275733A (en) * | 2008-05-06 | 2008-10-01 | 黄建聪 | Clip convex type pipeline joint component |
| CN201218371Y (en) * | 2008-05-13 | 2009-04-08 | 王俊忠 | Seal fitting assembly for automobile chassis |
| CN101922574A (en) * | 2010-07-30 | 2010-12-22 | 溧阳市四方不锈钢制品有限公司 | Abacterial check valve |
| CN103090062A (en) * | 2013-01-31 | 2013-05-08 | 马友朝 | One-way valve |
| CN204942637U (en) * | 2015-08-25 | 2016-01-06 | 台州建业阀门有限公司 | A kind of non-return loose joint ball valve |
| CN205424177U (en) * | 2016-03-21 | 2016-08-03 | 温州天悦流体设备科技有限公司 | Prevent check valve of leakage |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591544A (en) * | 2018-07-17 | 2018-09-28 | 阜宁县中洲阀门有限公司 | A kind of forged steel check-valves |
| CN108591544B (en) * | 2018-07-17 | 2023-09-19 | 江苏应流机械制造有限责任公司 | Forged steel check valve |
| CN113301763A (en) * | 2020-06-23 | 2021-08-24 | 阿里巴巴集团控股有限公司 | Liquid cooling rack, data center and edge calculation node |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9163737B2 (en) | Check valve for use with pumps controlled by variable frequency drives | |
| CN102162532B (en) | Low-temperature high pressure balancing plug valve | |
| US20170108131A1 (en) | Check valve | |
| CA2901751A1 (en) | Main valve with internal rigid structure | |
| CN206398137U (en) | A kind of check valve assembly | |
| CN208503573U (en) | A kind of boxing formula solid forging lift check valve | |
| CN105587949A (en) | Non-return valve capable of preventing leakage | |
| CN205155182U (en) | By dual -purpose valve of non return | |
| CN201487322U (en) | Check valve with valve plate slow closure function | |
| CN202402718U (en) | Check valve for pipeline | |
| RU104618U1 (en) | REVERSE THREE-POSITION VALVE | |
| CN205424177U (en) | Prevent check valve of leakage | |
| US7201188B2 (en) | Fluted reciprocating ball valve | |
| US11287057B2 (en) | Y-globe valve assembly with integrated pressure relief passageway | |
| CN203892634U (en) | Spherical check valve | |
| CN207470791U (en) | A kind of Double-clack stop valve | |
| CN207796188U (en) | A kind of flap check-valves | |
| CN104913069A (en) | Flow-adjustable valve | |
| CN215928399U (en) | A globe valve with semi-inserted disc | |
| CN104390019A (en) | Stop valve | |
| CN204083388U (en) | Safety check | |
| CN204729687U (en) | Lifting check valve | |
| CN210661401U (en) | Multi-valve seat valve device for gas pipeline | |
| CN106246927A (en) | The valve member of improved structure | |
| RU65598U1 (en) | REVERSE REVERSE VALVE |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160518 |
|
| RJ01 | Rejection of invention patent application after publication |