CN111853291A - One-way valve - Google Patents
One-way valve Download PDFInfo
- Publication number
- CN111853291A CN111853291A CN201910333229.XA CN201910333229A CN111853291A CN 111853291 A CN111853291 A CN 111853291A CN 201910333229 A CN201910333229 A CN 201910333229A CN 111853291 A CN111853291 A CN 111853291A
- Authority
- CN
- China
- Prior art keywords
- wall
- wall portion
- valve body
- filter assembly
- valve
- 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
- 238000001914 filtration Methods 0.000 claims description 21
- 239000000306 component Substances 0.000 claims description 9
- 238000001746 injection moulding Methods 0.000 claims description 3
- 239000008358 core component Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 3
- 230000000149 penetrating effect Effects 0.000 claims 2
- 230000000717 retained effect Effects 0.000 claims 2
- 239000012535 impurity Substances 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 5
- 238000004378 air conditioning Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006073 displacement reaction Methods 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/04—Plug, tap, or cock filters filtering elements mounted in or on a faucet
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
A check valve comprises a valve body and a valve core assembly, and is characterized by further comprising a filter assembly, wherein the filter assembly is arranged in the valve body, the valve body further comprises a first cavity and a second cavity, the first cavity is positioned in the area of one side of the filter assembly, the second cavity is positioned in the area of the other side of the filter assembly, the check valve further comprises a first interface and a second interface, one part of the first cavity is communicated with the first interface, one part of the second cavity is communicated with the second interface, the filter assembly comprises a framework and a filter screen, the filter screen is fixed with the framework or is of an integral structure, meshes of the filter screen are communicated with the first cavity and the second cavity, the check valve further comprises a spring, one end of the spring is abutted against the framework, the other end of the spring is abutted against the valve core assembly, impurities can be filtered by the check valve, the filter screen is integrated with a spring support of the check valve, and the, the installation is also more convenient.
Description
Technical Field
The invention relates to the field of fluid control, in particular to a one-way valve.
Background
In an air conditioning system, in order to influence the system operation by impurities in a flow path, a filter screen is generally arranged in a liquid storage device and used for filtering impurities in the air conditioning system, but in some air conditioning systems, the liquid storage device is removed for the purposes of saving assembly space or reducing weight, and generally a pipeline needs to be modified, and the filter screen is arranged in the pipeline.
Disclosure of Invention
Provides a one-way valve, which comprises a valve body and a valve core component and is characterized by also comprising a filtering component, the filter assembly is arranged in the valve body, the valve body further comprises a first cavity and a second cavity, the first cavity is positioned in the area of one side of the filter assembly, the second cavity is positioned in the area of the other side of the filter assembly, the one-way valve further comprises a first port and a second port, a portion of the first chamber is in communication with the first port, a portion of the second chamber is in communication with the second port, the filtering component comprises a framework and a filtering net, the filtering net is fixed with the framework or the framework and the filtering net are of an integral structure, the meshes of the filter screen are communicated with the first cavity and the second cavity, the one-way valve also comprises a spring, one end of the spring is abutted to the framework, and the other end of the spring is abutted to the valve core assembly.
Above-mentioned technical scheme is located the valve body with filtering component, and filtering component and valve body cooperation set up, and filtering component includes skeleton and filter screen, and the filter screen is fixed with the skeleton or skeleton and filter screen structure as an organic whole, and the check valve still includes the spring, the one end and the skeleton butt of spring, the other end and the case subassembly butt of spring. This check valve can filter impurity, and is integrated with the spring support piece of filter screen and check valve moreover, can reduce the quantity of spare part, and the installation is also comparatively convenient.
Drawings
FIG. 1 is a schematic cross-sectional view of a check valve according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the check valve of FIG. 1 taken along A-A;
FIG. 3 is a schematic view of a filter assembly in another embodiment;
FIG. 4 is a schematic view, partly in section, of a one-way valve according to a second embodiment;
FIG. 5 is a schematic view, partly in section, of a check valve in a third embodiment;
FIG. 6 is a perspective, partially cross-sectional, schematic view of the check valve of FIG. 5;
fig. 7 is a partial cross-sectional schematic view of a check valve in a fourth embodiment.
Detailed Description
The following description of the embodiments refers to the accompanying drawings. Referring to fig. 1, a check valve 100 includes a valve body 1, a filter assembly 2, and a valve core assembly 3, the filter assembly 2 is disposed in the valve body 1, the filter assembly 2 is disposed in cooperation with the valve body 1, the filter assembly 2 and the valve body 1 can be fixedly disposed, and the filter assembly 2 and the valve body 1 can also be disposed in a limiting manner. The valve body 1 further comprises a first chamber 11 and a second chamber 12, the first chamber 11 being located in the area of one side of the filter assembly 2, the second chamber 12 being located in the area of the other side of the filter assembly 2. The check valve 100 further includes a first port 10 and a second port 20, a portion of the first chamber 11 is communicated with the first port 10, and a portion of the second chamber 12 is communicated with the second port 20. Filter assembly 2 includes a skeleton 24 and a filter screen 25, and filter assembly 2 includes a plurality of meshes 21, and meshes 21 of filter screen 25 communicate first chamber 11 with second chamber 12.
When the check valve is turned on, the second port 20 is a fluid inlet, and the first port 10 is a fluid outlet. The fluid medium flowing into the second chamber 12 from the second port 20 can be filtered by the filter assembly 2, then enters the first chamber 11, and finally flows out of the check valve 100 from the first port 10, and the filter assembly is integrated in a valve body of the check valve, so that the installation flexibility is increased, and the space of an air conditioning system can be relatively reduced.
The check valve 100 further comprises a spring 9, one end of the spring 9 abuts against the framework 24, and the other end of the spring 9 abuts against the valve core assembly 3.
This check valve 100 can filter impurity, and is integrated with the spring support piece of filter screen and check valve moreover, can reduce the quantity of spare part, and the installation is also comparatively convenient.
Referring to fig. 2, the frame 24 includes a first wall portion 26 located at an outer side, a second wall portion 27 located at a middle portion, and a connecting portion 28 connecting the first wall portion 26 and the second wall portion 27, and a distance is maintained between the first wall portion 26 and the second wall portion 27. A portion of the filter screen 25 is located between the first wall portion 26 and the second wall portion 27, which can relatively increase the strength of the filter assembly. In this embodiment, the framework includes three connecting portions 28, and connecting portions 28 evenly distributed between first wall portion 26 and second wall portion 27 to further increase the stability and the intensity of filter plate assembly, also can increase the intensity of filter screen. It should be noted here that the first wall portion and the second wall portion may also be absent in the filter assembly, i.e. the thickness of the filter web is the same as the thickness of the framework, and the first wall portion and the second wall portion may be absent.
The filter assembly 2 comprises a through-going hole 23, which through-going hole 23 is located in the middle of the second wall portion 27 and runs through the skeleton 24. The valve core assembly 3 comprises a valve core shaft 32, the valve core shaft 32 penetrates through the through hole 23, and the outer wall of the valve core shaft 32 and the inner wall corresponding to the through hole 23 are limited and matched in a sliding mode. Specifically, the spool shaft 32 at least includes a first outer side wall 321 and a second outer side wall 322, the side wall of the through hole 23 at least includes a first inner side wall 231 and a second inner side wall 232, the first outer side wall 321 is disposed in a position-limited manner and in sliding fit with the first inner side wall 231, and the second outer side wall 322 is disposed in a position-limited manner and in sliding fit with the second inner side wall 232, so that the filter assembly is disposed in a position-limited manner with respect to the spool shaft, the possibility of circumferential rotation of the spool shaft and the filter assembly can be relatively reduced, and the working stability of the check valve. The distance between the outer side wall of the valve core shaft 32 and the inner side wall of the through hole 23 is 0.1mm-0.15mm, and in the range, the valve core shaft can slide in the through hole, and the possibility of impurities passing through the valve core shaft and the through hole can be reduced.
The spring 9 is sleeved on the valve plug shaft 32, and one end of the spring 9 abuts against the second wall portion 27 and/or the connecting portion 28.
Referring to fig. 1 and 3, in the present embodiment, the first wall 26 of the framework 24 is sealed with the inner wall of the valve body 1, so that the possibility that the working medium flows out without being filtered by the filter assembly is relatively reduced. The mesh number of the filter screen 25 is 80-100 meshes, and within the range, the filter precision of the filter assembly 2 can be ensured, and the flow resistance requirement of the one-way valve 100 can be met. The frame 24 and the filter screen 25 may be made of metal or plastic. The filter screen 25 is fixed with the framework 24 or the framework 24 and the filter screen 25 are in an integral structure, when one of the framework 24 and the filter screen 25 is made of plastic, the framework 24 and the filter screen 25 are in an integral structure formed by injection molding by taking the filter screen as an insert; when the framework 24 and the filter screen 25 are made of metal, the framework 24 and the filter screen 25 can be fixed by welding.
In the present embodiment, the filter unit 2 has a plate-like structure, the inner wall of the valve body 1 includes a first inner wall portion 15 and a second inner wall portion 16, and the diameter of the first inner wall portion 15 is larger than the diameter of the second inner wall portion 16. The valve body 1 further comprises a limiting portion 17, and the limiting portion 17 is located between the first inner wall portion 15 and the second inner wall portion 16. The check valve 100 further includes a limiting member 4, the limiting member 4 is located in the valve body 1, an outer wall of the limiting member 4 is in interference fit with the first inner wall portion 15, and the filtering assembly 2 is limited between the limiting portion 17 and the limiting member 4, so that the filtering assembly 2 and the valve body 1 are limited. In this embodiment, the limiting member is a cylinder structure, the outer wall of the cylinder is in interference fit with the inner wall of the valve body, and of course, other manners such as threaded connection may be fixed to the valve body, and the limiting member may be a part that can limit the filtering assembly. In the present embodiment, the filter assembly 2 not only has a function of filtering impurities, but also can limit the valve core assembly 3, and can limit the displacement of the valve core assembly 3.
Referring to fig. 4, in the second embodiment, the valve body 101 includes a limit protrusion 18, and the limit protrusion 18 protrudes from the inner wall of the valve body 101. The check valve 100 further comprises a limiting piece 4, the limiting piece 4 is located in the valve body 101, the outer wall of the limiting piece 4 is in interference fit with the inner wall of the valve body 101, and the filtering component 2 is limited between the limiting convex portion 18 and the limiting piece 4, so that the filtering component and the valve body are limited.
Referring to fig. 5-6, in the third embodiment, the filter assembly 2 is a plate-shaped structure, the inner wall of the valve body 102 includes a first inner wall portion 150 and a second inner wall portion 160, the diameter of the first inner wall portion 150 is greater than the diameter of the second inner wall portion 160, the valve body 102 further includes a limiting portion 170, the limiting portion 170 is located between the first inner wall portion 150 and the second inner wall portion 160, the valve body 102 further includes a groove portion 180, the groove portion 180 is recessed from the first inner wall portion 150, the check valve 100 further includes a limiting member 40, the limiting member 40 is partially located in the groove portion 180, and the filter assembly 2 is limited between the limiting portion 170 and the limiting member 40, so that the filter assembly 2 and the valve body 102 are limited. The limiting member 40 in this embodiment may be a snap spring, a buckle, or the like, and has a simple structure and is convenient to mount and dismount.
Certainly also can be according to actual conditions, set up the valve body and include spacing convex part, spacing convex part is from the protruding setting of the inner wall of valve body, and the filter assembly is spacing between spacing convex part and locating part for the spacing setting of filter assembly and valve body.
Referring to fig. 7, in the fourth embodiment, the filter assembly 2 is a plate-shaped structure, the valve body 103 includes a groove portion 180, the groove portion 180 is recessed from an inner wall of the valve body 103, the filter assembly 2 is at least partially located in the groove portion 180, and the filter assembly 2 is limited between two side walls of the groove portion 180, so that the filter assembly 2 and the valve body 103 are limited. In the embodiment, the filter assembly does not need an additional limiting part to limit the filter assembly, so that the number of parts is relatively reduced.
According to actual conditions, the valve body can be arranged to comprise a limiting convex part, the limiting convex part is arranged in a protruding mode from the inner side wall of the valve body, and the framework is limited between the limiting convex part and the limiting part, so that the filtering assembly and the valve body are limited.
The filter assembly is integrated in the valve body of the one-way valve, the filter assembly has various structures, and a medium can be filtered by the filter assembly as long as the limit installation of the filter assembly and the valve body can be met. The filter assembly is integrated in the valve body of the one-way valve, and the space occupation of the air conditioning system can be relatively reduced compared with the mode that the filter assembly is integrated in a pipeline.
Finally, it should be noted that: therefore, although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that various changes and modifications can be made by the inventor without departing from the scope of the invention, and all such changes and modifications are intended to be included within the scope of the appended claims.
Claims (10)
1. A one-way valve comprises a valve body and a valve core component, and is characterized by also comprising a filtering component, the filter assembly is arranged in the valve body, the valve body further comprises a first cavity and a second cavity, the first cavity is positioned in the area of one side of the filter assembly, the second cavity is positioned in the area of the other side of the filter assembly, the one-way valve further comprises a first port and a second port, a portion of the first chamber is in communication with the first port, a portion of the second chamber is in communication with the second port, the filtering component comprises a framework and a filtering net, the filtering net is fixed with the framework or the framework and the filtering net are of an integral structure, the meshes of the filter screen are communicated with the first cavity and the second cavity, the one-way valve also comprises a spring, one end of the spring is abutted to the framework, and the other end of the spring is abutted to the valve core assembly.
2. The check valve according to claim 1, wherein the frame includes a first wall portion located at an outer side, a second wall portion located at a middle portion, and a connecting portion connecting the first wall portion and the second wall portion, a distance is maintained between the first wall portion and the second wall portion, a portion of the filter screen is located between the first wall portion and the second wall portion, the filter assembly includes a through hole located at a middle portion of the second wall portion and penetrating through the frame, the valve core assembly includes a valve core shaft passing through the through hole, an outer wall of the valve core shaft and an inner wall corresponding to the through hole are in a limiting arrangement and in a sliding fit, the spring is sleeved on the valve core shaft, and one end of the spring abuts against the second wall portion and/or the connecting portion.
3. The check valve of claim 2, wherein the spool shaft includes at least a first outer sidewall and a second outer sidewall, the sidewalls of the through hole include at least a first inner sidewall and a second inner sidewall, the first outer sidewall is disposed in a position-limited manner with respect to the first inner sidewall, and the second outer sidewall is disposed in a position-limited manner with respect to the second inner sidewall.
4. The check valve according to any one of claims 1 to 3, wherein the frame and the filter screen are an integral structure formed by injection molding with the filter screen as an insert, the first wall portion of the frame and the inner wall of the valve body are arranged in a sealing manner, and the mesh number of the filter screen is 80 to 100 meshes; or the framework and the filter screen are fixed by welding, the first wall part of the framework and the inner wall of the valve body are arranged in a sealing way, and the mesh number of the filter screen is 80-100 meshes.
5. The check valve according to any one of claims 1 to 4, wherein the filter assembly has a plate-like structure, the inner wall of the valve body includes a first inner wall portion and a second inner wall portion, the diameter of the first inner wall portion is greater than the diameter of the second inner wall portion, the valve body further includes a limiting portion, the limiting portion is located between the first inner wall portion and the second inner wall portion, the check valve further includes a limiting member, the limiting member is located in the valve body, the outer wall of the limiting member is in interference fit with the first inner wall portion, and the filter assembly is limited between the limiting portion and the limiting member.
6. The check valve of any one of claims 1-4, wherein the filter assembly is a plate-like structure, the inner wall of the valve body includes a first inner wall portion and a second inner wall portion, the first inner wall portion has a diameter greater than the second inner wall portion, the valve body further includes a limiting portion located between the first inner wall portion and the second inner wall portion, the valve body further includes a groove portion recessed from the first inner wall portion, the check valve further includes a retaining member located partially within the groove portion, and the filter assembly is retained between the limiting portion and the retaining member.
7. The check valve of any of claims 1-4, wherein the filter assembly is a plate-like structure, the valve body includes a convex limiting portion protruding from an inner wall of the valve body, the valve body further includes a recessed portion recessed from the inner wall of the valve body, the check valve further includes a retaining member partially disposed in the recessed portion, and the filter assembly is retained between the convex limiting portion and the retaining member.
8. The check valve according to any one of claims 1 to 4, wherein the filter assembly has a plate-shaped structure, the valve body includes a limit protrusion protruding from an inner wall of the valve body, the check valve further includes a limit member located in the valve body, an outer wall of the limit member is in interference fit with the inner wall of the valve body, and the filter assembly is limited between the limit protrusion and the limit member.
9. The check valve of any of claims 1-4, wherein the filter assembly is a plate-like structure, the valve body includes a recessed portion recessed from an inner wall of the valve body, the filter assembly is at least partially positioned within the recessed portion, and the filter assembly is captured between two sidewalls of the recessed portion.
10. The check valve according to claim 1, wherein the frame includes a first wall portion located at an outer side, a second wall portion located at a middle portion, and a connecting portion connecting the first wall portion and the second wall portion, a distance is maintained between the first wall portion and the second wall portion, a portion of the filter screen is located between the first wall portion and the second wall portion, the filter assembly includes a through hole located at a middle portion of the second wall portion and penetrating through the frame, the valve core assembly includes a valve core shaft passing through the through hole, an outer wall of the valve core shaft and an inner wall corresponding to the through hole are in a limited arrangement and in a sliding fit, the spring is sleeved on the valve core shaft, and one end of the spring abuts against the second wall portion and/or the connecting portion;
the valve core shaft at least comprises a first outer side wall and a second outer side wall, the side wall of the through hole at least comprises a first inner side wall and a second inner side wall, the first outer side wall and the first inner side wall are arranged in a limiting mode, and the second outer side wall and the second inner side wall are arranged in a limiting mode;
the distance range between the outer side wall of the valve core shaft and the inner side wall of the through hole is 0.1mm-0.15 mm;
The framework and the filter screen are of an integrated structure formed by injection molding by taking the filter screen as an insert, the first wall part of the framework and the inner wall of the valve body are arranged in a sealing manner, and the mesh number of the filter screen is 80-100 meshes;
the connecting parts are uniformly distributed between the first wall part and the second wall part;
the filter assembly is of a plate-shaped structure, the inner wall of the valve body comprises a first inner wall portion and a second inner wall portion, the diameter of the first inner wall portion is larger than that of the second inner wall portion, the valve body further comprises a limiting portion, the limiting portion is located between the first inner wall portion and the second inner wall portion, the valve body further comprises a groove portion, the groove portion is arranged in a recessed mode in the first inner wall portion, the one-way valve further comprises a limiting part, the limiting part is located in the groove portion, and the filter assembly is limited between the limiting part and the limiting part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910333229.XA CN111853291A (en) | 2019-04-24 | 2019-04-24 | One-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910333229.XA CN111853291A (en) | 2019-04-24 | 2019-04-24 | One-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111853291A true CN111853291A (en) | 2020-10-30 |
Family
ID=72952077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910333229.XA Pending CN111853291A (en) | 2019-04-24 | 2019-04-24 | One-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111853291A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112999743A (en) * | 2021-03-22 | 2021-06-22 | 四川省分析测试服务中心 | High-pressure filter valve |
| CN115518454A (en) * | 2022-08-08 | 2022-12-27 | 黄山艾肯机械制造有限公司 | Main shaft center goes out water system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201963964U (en) * | 2011-01-25 | 2011-09-07 | 浙江通用阀门有限公司 | Check valve |
| CN105090569A (en) * | 2015-07-13 | 2015-11-25 | 珠海格力电器股份有限公司 | Check valve structure and air conditioner |
| CN204942642U (en) * | 2015-07-15 | 2016-01-06 | 浙江万通管业有限公司 | A kind of safety valve for water heater |
| CN206592591U (en) * | 2017-02-09 | 2017-10-27 | 东莞市长原喷雾技术有限公司 | A kind of low pressure leakage-preventing check valve |
| CN206972989U (en) * | 2017-07-01 | 2018-02-06 | 高振芬 | A kind of drainage pipeline anti-backflow device |
| CN207634749U (en) * | 2017-10-18 | 2018-07-20 | 浙江搏正铜业有限公司 | A kind of check-valves |
| CN208670160U (en) * | 2018-06-29 | 2019-03-29 | 浙江三花汽车零部件有限公司 | A kind of check valve |
-
2019
- 2019-04-24 CN CN201910333229.XA patent/CN111853291A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201963964U (en) * | 2011-01-25 | 2011-09-07 | 浙江通用阀门有限公司 | Check valve |
| CN105090569A (en) * | 2015-07-13 | 2015-11-25 | 珠海格力电器股份有限公司 | Check valve structure and air conditioner |
| CN204942642U (en) * | 2015-07-15 | 2016-01-06 | 浙江万通管业有限公司 | A kind of safety valve for water heater |
| CN206592591U (en) * | 2017-02-09 | 2017-10-27 | 东莞市长原喷雾技术有限公司 | A kind of low pressure leakage-preventing check valve |
| CN206972989U (en) * | 2017-07-01 | 2018-02-06 | 高振芬 | A kind of drainage pipeline anti-backflow device |
| CN207634749U (en) * | 2017-10-18 | 2018-07-20 | 浙江搏正铜业有限公司 | A kind of check-valves |
| CN208670160U (en) * | 2018-06-29 | 2019-03-29 | 浙江三花汽车零部件有限公司 | A kind of check valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112999743A (en) * | 2021-03-22 | 2021-06-22 | 四川省分析测试服务中心 | High-pressure filter valve |
| CN112999743B (en) * | 2021-03-22 | 2022-08-23 | 四川省分析测试服务中心 | High-pressure filter valve |
| CN115518454A (en) * | 2022-08-08 | 2022-12-27 | 黄山艾肯机械制造有限公司 | Main shaft center goes out water system |
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