CN112161068B - Stop valve adopting perchloroethylene - Google Patents
Stop valve adopting perchloroethylene Download PDFInfo
- Publication number
- CN112161068B CN112161068B CN202011044959.7A CN202011044959A CN112161068B CN 112161068 B CN112161068 B CN 112161068B CN 202011044959 A CN202011044959 A CN 202011044959A CN 112161068 B CN112161068 B CN 112161068B
- Authority
- CN
- China
- Prior art keywords
- valve
- valve rod
- rod
- fixedly connected
- perchloroethylene
- 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
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 210000004907 gland Anatomy 0.000 claims abstract description 22
- 238000003825 pressing Methods 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 11
- -1 Polytetrafluoroethylene Polymers 0.000 description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 description 9
- 239000012530 fluid Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 4
- 230000004927 fusion Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 229940045860 white wax Drugs 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
- 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
- F16K1/02—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 with screw-spindle
-
- 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
- F16K1/48—Attaching valve members to screw-spindles
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a stop valve adopting perchloroethylene, which comprises the following components: the valve comprises a valve body, a valve rod nut, a valve rod and a valve core, wherein the valve rod nut is fixedly connected to the outer side of the center of the top of the valve body through threads, the valve rod is movably connected to the inner side of the center of the valve body through clamping, a gland is fixedly connected to the outer wall of the bottom of the valve rod through threads, and the valve core is fixedly connected between the bottom of the gland and the outer wall of the valve rod through the clamping.
Description
Technical Field
The invention relates to the technical field of stop valves, in particular to a stop valve adopting perchloroethylene.
Background
The shut-off valve is also called a shut-off valve, and belongs to a forced sealing type valve, so that when the valve is closed, pressure must be applied to the valve clack so as to force the sealing surface not to leak. When a medium enters the valve from the lower part of the valve clack, the resistance which needs to be overcome by the operation force is the friction force of the valve rod and the filler and the thrust generated by the pressure of the medium, and the force for closing the valve is larger than the force for opening the valve, so that the diameter of the valve rod is larger, otherwise, the valve rod is in a bending fault. The connection mode is divided into three types: flange connection, screw thread connection and welding connection. Polytetrafluoroethylene, commonly known as "plastic king", is a high molecular polymer prepared by polymerizing tetrafluoroethylene as a monomer. White wax, semitransparent, heat-resistant and cold-resistant, and can be used for a long time at-180-260 ℃. The polytetrafluoroethylene valve has the characteristics of acid resistance, alkali resistance and resistance to various organic solvents.
1. When polytetrafluoroethylene is used for manufacturing a valve in the prior art, particularly when the polytetrafluoroethylene stop valve is used, the bending resistance of the valve rod is weak, and in the use process of the polytetrafluoroethylene stop valve, the valve rod is easy to bend and deform under the action of a water hammer impacted by water flow, so that the stop valve is easy to leak.
2. When polytetrafluoroethylene is used for manufacturing a valve in the prior art, particularly when a stop valve is used, the valve core is not firmly connected with a valve rod, and the valve is easy to fall off, so that the valve is invalid.
Disclosure of Invention
The present invention is directed to a shut-off valve employing perchloroethylene to solve the problems set forth in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a shut-off valve employing perchloroethylene comprising: valve body, valve rod nut, valve rod and case, valve body top central authorities outside is through threaded fixedly connected with valve rod nut the inside valve rod that is connected with through joint activity in valve body central authorities, and valve rod bottom outer wall is through threaded fixedly connected with gland, through joint fixedly connected with case between gland bottom and the valve rod outer wall, valve body top inner wall is located the valve rod outside and through butt fusion fixedly connected with deflector.
Preferably, the valve body further comprises: the valve comprises a water inlet, an expansion chamber, a threaded sealing ring and a weight hole, wherein the water inlet is formed in one side of the valve body, the water outlet is formed in one side, far away from the water inlet, of the valve body, the expansion chamber is formed in one side of the upper half of the valve body, the center of the top of the valve body is located outside the valve rod and is fixedly connected with the threaded sealing ring through clamping, and the weight hole is formed in the outer side of the lower half of the valve body.
Preferably, the guide plate further comprises: the O-shaped ring is fixedly connected with the guide plate in a clamping manner, and the guide plate is positioned at the outer side of the valve rod and used for sealing between the guide plate and the valve rod.
Preferably, the valve stem further comprises: the valve rod comprises a hand wheel, a step rod and a limiting block, wherein the step rod is machined at one end of the bottom of the valve rod, the limiting block is machined below the step rod at the bottom of the valve rod, the hand wheel is fixedly connected to one end of the top of the valve rod through a clamping connection, the valve rod is convenient to rotate through the hand wheel, and the valve core is convenient to connect and fix through the cooperation of the step rod and the limiting block.
Preferably, the gland further comprises: the valve core is characterized by comprising a pressing sleeve and a pressing plate, wherein the outer wall of the bottom of the pressing cover is fixedly connected with the pressing sleeve through threads, the pressing plate is fixedly connected with the pressing plate through a clamping connection and is used for connecting the valve rod with the pressing plate through the pressing sleeve, and the valve core is prevented from being separated.
Preferably, the valve core further comprises: the step groove is formed in the center of the inner portion of the valve core, and the valve core is convenient to connect with the valve rod.
Preferably, the center of the inside of the pressing sleeve is provided with a cross groove, and the pressing plate is clamped above the cross groove obtained by the pressing sleeve and is used for clamping the valve core.
Preferably, the contour of the inner wall of the lower half part of the cross groove of the pressing sleeve is matched with the contour of the outer wall of the upper half part of the valve core, so that the valve core can be clamped firmly.
Preferably, the gland, the pressure sleeve, the pressure plate and the valve rod are in transition fit, so that the gland and parts thereof are driven to rotate together in the rotation process of the valve rod, the valve core also rotates along with the rotation, and the valve core is opened and closed smoothly.
Preferably, the center inside the valve rod nut is rotationally connected with the valve rod through threads and used for lifting and descending the valve rod to drive the valve core to lift and descend so as to complete opening and closing of the stop valve.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the invention, when the stop valve adopting full polytetrafluoroethylene is used, fluid enters the stop valve through the water inlet, the stop valve is closed through the seal between the valve core and the valve body, when the stop valve needs to be opened, the valve rod is rotated through the hand wheel, the valve rod rises under the screw thread action of the valve rod nut and the screw thread seal ring, the valve rod drives the valve core and the gland assembly to rise together, the valve core rotates along with the valve rod in the rising process, so that the valve core is slowly separated from the valve body, the kinetic energy of the fluid is reduced to pressure potential energy, and meanwhile, when the fluid enters the upper half part of the valve body, the impact energy of the fluid is eliminated through the buffering of the expansion chamber, the occurrence of water hammer is reduced, meanwhile, the bending of the valve rod is effectively avoided through the guiding and correcting of the guide plate in the rising or falling process of the valve rod, the bending resistance of the valve rod is greatly increased, and the internal leakage of the valve body is prevented.
2. According to the invention, through the gland, the pressure sleeve and the pressure plate, when the stop valve adopting the full polytetrafluoroethylene is used, the gland, the pressure sleeve, the pressure plate and the valve rod are in transition fit, so that the gland and parts thereof are driven to rotate together in the rotation process of the valve rod, the valve core is enabled to rotate along with the rotation, the opening and closing stroke of the valve core is increased, the tension between the valve core and the valve rod is reduced, and the valve core is prevented from being separated.
Drawings
FIG. 1 is a schematic cross-sectional view of the overall front view of the present invention;
FIG. 2 is a schematic diagram of the overall front view structure of the present invention;
FIG. 3 is a schematic cross-sectional view of the front view of the valve body of the present invention;
FIG. 4 is a schematic front cross-sectional view of a valve stem connection of the present invention;
FIG. 5 is an enlarged schematic view in front cross-section of the valve core connecting structure of the present invention.
In the figure: 1-a valve body; 101-a water inlet; 102-an expansion chamber; 103-a threaded sealing ring; 104-a water outlet; 105-weight ports; 2-a valve stem nut; 3-guide plates; 301-O-shaped ring; 4-a valve rod; 401-a hand wheel; 402-step bar; 403-limiting blocks; 5-capping; 501-pressing the sleeve; 502-pressing plates; 6-valve core; 601-step groove.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-5, the present invention provides a technical solution: a shut-off valve employing perchloroethylene comprising: valve body 1, valve rod nut 2, valve rod 4 and case 6, valve body 1 top central authorities outside is connected with valve rod nut 2 through screw thread fixedly, and valve body 1 central authorities inside is movably connected with valve rod 4 through the joint, and valve rod 4 bottom outer wall is through screw thread fixedly connected with gland 5, is fixedly connected with case 6 through the joint between gland 5 bottom and the valve rod 4 outer wall, and valve body 1 top inner wall is located the valve rod 4 outside and is fixedly connected with deflector 3 through the butt fusion.
The valve body 1 further includes: the water inlet 101, expansion chamber 102, screw thread sealing washer 103 and weight hole 105, water inlet 101 has been seted up to valve body 1 one side, and water outlet 104 has been seted up to valve body 1 side of keeping away from water inlet 101, and expansion chamber 102 has been seted up to valve body 1 upper half one side inside, and valve body 1 top central authorities are located the valve rod 4 outside and pass through joint fixedly connected with screw thread sealing washer 103, and weight hole 105 has been seted up to valve body 1 lower half one side outside, and deflector 3 still includes: the O-shaped ring 301 is fixedly connected with the O-shaped ring 301 by clamping the outer side of the valve rod 4 at the center of the guide plate 3, and is used for sealing between the guide plate 3 and the valve rod 4.
The valve stem 4 further includes: hand wheel 401, ladder pole 402 and stopper 403, valve rod 4 bottom one end has ladder pole 402 through the machining, and valve rod 4 bottom is located ladder pole 402 below and has stopper 403 through the machining, and valve rod 4 top one end is through joint fixedly connected with hand wheel 401, is convenient for the rotation of valve rod 4 through hand wheel 401, is convenient for the connection and the fixed of case 6 through the cooperation of ladder pole 402 and stopper 402, and gland 5 still includes: pressure cover 501 and clamp plate 502, gland 5 bottom outer wall is through screw thread fixedly connected with pressure cover 501, and pressure cover 501 is inside to be located case 6 top and is passed through joint fixedly connected with clamp plate 502 for be connected valve rod 4 and case 6 through pressure cover 501 and clamp plate 502, prevent that case 6 from breaking away from, case 6 still includes: the step groove 601 is formed in the center of the inner part of the valve core 6, and the step groove 601 is formed in the center of the inner part of the valve core 6, so that the valve core 6 is conveniently connected with the valve rod 4.
The cross groove is formed in the center of the inside of the pressing sleeve 501, the pressing plate 502 is clamped on the pressing sleeve 501 to obtain the upper portion of the cross groove, the clamping connection of the valve core 6 is achieved, the inner wall outline of the lower half portion of the cross groove of the pressing sleeve 501 is matched with the outer wall outline of the upper half portion of the valve core 6, the valve core 6 is clamped firmly, the pressing cover 5, the pressing sleeve 501, the pressing plate 502 and the valve rod 4 are in transition fit, the pressing cover 5 and parts thereof are driven to rotate together in the rotation process of the valve rod 4, the valve core 6 is enabled to rotate along with the rotation, the center of the inside of the valve rod nut 2 is connected with the valve rod 4 through threads in a rotating mode, and the pressing sleeve is used for lifting and descending of the valve rod 4 to drive the valve core 6 to lift and descend to complete opening and closing of the stop valve.
Working principle: when the stop valve adopting full polytetrafluoroethylene is used, fluid enters the stop valve through the water inlet, the stop valve is closed through the seal between the valve core 6 and the valve body 1, when the stop valve needs to be opened, the valve rod 4 is rotated through the hand wheel 401, under the threaded action of the valve rod nut 2 and the threaded sealing ring 103, the valve rod 4 rises, the valve rod 4 drives the valve core 6 and the gland 5 to rise together, the valve core 6 rotates along with the valve rod 4 in the rising process, the valve core 6 is slowly separated from the valve body 1, the kinetic energy of the fluid is reduced to pressure potential energy, meanwhile, when the fluid enters the upper half part of the valve body 1, the impact energy of the fluid is eliminated through the buffer of the expansion chamber 102, the occurrence of water hammer is reduced, simultaneously, the bending of the valve rod 4 is effectively avoided in the rising or falling process of the valve rod 4, the bending resistance of the valve rod 4 is greatly increased, the internal leakage is prevented from being generated in the valve body 1, the valve core 6 is driven to rotate along with the valve rod 4 through the gland 5, the pressure sleeve 501 and the pressure plate 502, the valve rod 4 is in transition fit, the valve core 4 is driven to rotate in the rotating process, the valve core 6 and the valve core 6 is also prevented from being opened and closed, the valve core 6 is opened and closed, and closed together with the valve core 6 is prevented from being opened.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A shut-off valve employing perchloroethylene comprising:
A valve body (1);
A valve stem nut (2);
A valve stem (4);
a valve core (6),
The valve body (1) is characterized in that a valve rod nut (2) is fixedly connected to the outer side of the center of the top of the valve body (1) through threads, a valve rod (4) is movably connected to the inner side of the center of the valve body (1) through clamping, a gland (5) is fixedly connected to the outer wall of the bottom of the valve rod (4) through threads, a valve core (6) is fixedly connected between the bottom of the gland (5) and the outer wall of the valve rod (4) through clamping, and a guide plate (3) is fixedly connected to the inner wall of the top of the valve body (1) outside the valve rod (4) through welding;
The valve body (1) further comprises:
a water inlet (101);
An expansion chamber (102);
a threaded seal ring (103);
A weight port (105),
The novel valve is characterized in that a water inlet (101) is formed in one side of the valve body (1), a water outlet (104) is formed in one side, far away from the water inlet (101), of the valve body (1), an expansion chamber (102) is formed in one side of the upper half of the valve body (1), a threaded sealing ring (103) is fixedly connected to the center of the top of the valve body (1) outside the valve rod (4) through clamping, and a weight balancing hole (105) is formed in the outer side of the lower half of the valve body (1).
2. A shut-off valve employing perchloroethylene according to claim 1, wherein: the guide plate (3) further comprises: the O-shaped ring (301), the center of the guide plate (3) is positioned outside the valve rod (4) and is fixedly connected with the O-shaped ring (301) through clamping.
3. A shut-off valve employing perchloroethylene according to claim 1, wherein: the valve stem (4) further comprises:
A hand wheel (401);
A step bar (402);
A limiting block (403),
The novel valve rod comprises a valve rod body and is characterized in that a stepped rod (402) is machined at one end of the bottom of the valve rod body (4), a limiting block (403) is machined below the stepped rod (402) at the bottom of the valve rod body, and a hand wheel (401) is fixedly connected to one end of the top of the valve rod body (4) through clamping.
4. A shut-off valve employing perchloroethylene according to claim 1, wherein: the gland (5) further comprises:
a press sleeve (501);
a pressing plate (502),
The outer wall of the bottom of the gland (5) is fixedly connected with a pressure sleeve (501) through threads, and a pressure plate (502) is fixedly connected to the inside of the pressure sleeve (501) above the valve core (6) through clamping.
5. A shut-off valve employing perchloroethylene according to claim 1, wherein:
the valve cartridge (6) further comprises: the step groove (601) is formed in the center of the inner portion of the valve core (6).
6. A shut-off valve for use with perchloroethylene as defined in claim 4, wherein: the center of the inside of the pressing sleeve (501) is provided with a cross groove, and the pressing plate (502) is clamped above the cross groove obtained by the pressing sleeve (501).
7. A shut-off valve for use with perchloroethylene as defined in claim 4, wherein: the contour of the inner wall of the lower half part of the cross groove of the pressing sleeve (501) is matched with the contour of the outer wall of the upper half part of the valve core (6).
8. A shut-off valve for use with perchloroethylene as defined in claim 4, wherein: the gland (5), the pressure sleeve (501), the pressure plate (502) and the valve rod (4) are in transition fit.
9. A shut-off valve employing perchloroethylene according to claim 1, wherein: the center inside the valve rod nut (2) is rotationally connected with the valve rod (4) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011044959.7A CN112161068B (en) | 2020-09-29 | 2020-09-29 | Stop valve adopting perchloroethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011044959.7A CN112161068B (en) | 2020-09-29 | 2020-09-29 | Stop valve adopting perchloroethylene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112161068A CN112161068A (en) | 2021-01-01 |
| CN112161068B true CN112161068B (en) | 2024-04-19 |
Family
ID=73862117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011044959.7A Active CN112161068B (en) | 2020-09-29 | 2020-09-29 | Stop valve adopting perchloroethylene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112161068B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898782A (en) * | 2021-10-12 | 2022-01-07 | 精工阀门集团有限公司 | Valve rod positioning and guiding device of oxygen stop valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2076626U (en) * | 1990-06-20 | 1991-05-08 | 林乃凯 | Full-plastic reinforced stop valve |
| CN101225885A (en) * | 2007-01-17 | 2008-07-23 | 江苏明江阀业有限公司 | Fluoroplastics whole lining stop valve special for alkali-chloride |
| CN105090542A (en) * | 2015-09-16 | 2015-11-25 | 上海沪东造船阀门有限公司 | Ultralow-temperature stainless steel welding type stop valve for liquefied natural gas ship |
| CN205026112U (en) * | 2015-09-30 | 2016-02-10 | 山东益都阀门集团股份有限公司 | Marine stop valve |
| CN207921432U (en) * | 2018-01-26 | 2018-09-28 | 江苏宝瑞创流体科技有限公司 | Multi-functional reusable shut-off valve |
| CN208123456U (en) * | 2018-04-10 | 2018-11-20 | 盐城申宇科技服务有限公司 | A kind of shut-off valve with protection mechanism |
-
2020
- 2020-09-29 CN CN202011044959.7A patent/CN112161068B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2076626U (en) * | 1990-06-20 | 1991-05-08 | 林乃凯 | Full-plastic reinforced stop valve |
| CN101225885A (en) * | 2007-01-17 | 2008-07-23 | 江苏明江阀业有限公司 | Fluoroplastics whole lining stop valve special for alkali-chloride |
| CN105090542A (en) * | 2015-09-16 | 2015-11-25 | 上海沪东造船阀门有限公司 | Ultralow-temperature stainless steel welding type stop valve for liquefied natural gas ship |
| CN205026112U (en) * | 2015-09-30 | 2016-02-10 | 山东益都阀门集团股份有限公司 | Marine stop valve |
| CN207921432U (en) * | 2018-01-26 | 2018-09-28 | 江苏宝瑞创流体科技有限公司 | Multi-functional reusable shut-off valve |
| CN208123456U (en) * | 2018-04-10 | 2018-11-20 | 盐城申宇科技服务有限公司 | A kind of shut-off valve with protection mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112161068A (en) | 2021-01-01 |
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