CN114439965A - Ball valve sealing structure for thermal management module - Google Patents
Ball valve sealing structure for thermal management module Download PDFInfo
- Publication number
- CN114439965A CN114439965A CN202111622668.6A CN202111622668A CN114439965A CN 114439965 A CN114439965 A CN 114439965A CN 202111622668 A CN202111622668 A CN 202111622668A CN 114439965 A CN114439965 A CN 114439965A
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- Prior art keywords
- sealing
- ball valve
- management module
- thermal management
- injection molding
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- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 94
- 238000001746 injection moulding Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 10
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 claims abstract description 7
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 7
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000000243 solution Substances 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0668—Single packings
-
- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0657—Particular coverings or materials
-
- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0689—Packings between housing and plug
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention relates to a ball valve sealing structure for a thermal management module, which comprises a thermal management module shell and a ball valve, wherein sealing elements are arranged between the ball valve and corresponding flow passages on the thermal management module shell, and the sealing elements are fixedly arranged in positioning grooves on the thermal management module shell. The sealing element is integrally formed by injection molding of an injection molding grade ETFE material, and compared with the traditional ball valve sealing assembly, the sealing element is simpler in structure, easy to assemble and particularly suitable for application occasions with limited space layout; the integrated injection molding process is adopted, so that the number of parts is reduced, the system tolerance of the assembly is reduced, and the sealing reliability is higher; the sealing element designed and developed by the material has stable performance index, and good sample experimental data sealing performance (the sealing leakage index of the ball valve is less than or equal to 300ml/min @20kpa), and meets the sealing performance requirement of the heat management valve body.
Description
Technical Field
The present invention relates to a thermal management module used in a cooling system mounted on an internal combustion engine, a new energy vehicle, a fuel cell, or the like, and particularly relates to a ball valve sealing structure for a thermal management module.
Background
The existing thermal management module generally adopts a structure as shown in fig. 1, a sealing component is composed of an EPDM rubber elastic body, a resin support ring (PPS commonly used) and a resin sealing ring (PVDF or PTFE commonly used), in order to facilitate product assembly, a shell A of the thermal management module assembly and pipeline shells B and C must be made into split structures, symmetrical installation positioning grooves are processed on the pipeline shells to position the ball valve sealing component, complex tools are required to be added for sealing component assembly and subsequent ball valve main body assembly, and the structure mainly has the following limitations: 1. the product space layout needs to be larger, so that a TMM (thermal management module) assembly shell and a pipeline shell can be conveniently made into a split structure, a fastener and a sealing element are connected between the newly-added shells, and a special tool needs to be added for product assembly to realize positioning assistance; 2. under the same sealing effect, the number of parts is increased due to the combination of the three-piece sealing parts and the newly added sealing parts and connecting parts between the shells, the development cost and the process assembly cost of the parts are correspondingly increased, and the cost optimization of the TMM assembly is not facilitated; 3. the sealing ring of the existing heat management module on the market can only achieve the leakage rate of the opening of the sealing ball valve being less than or equal to 1000ml/min @20kpa, and the latest leakage rate required by a customer being less than or equal to 500ml/min @20 kpa.
Disclosure of Invention
In order to solve the problems, the invention provides a ball valve sealing structure for a thermal management module, which overcomes the restriction condition of spatial layout, simplifies the structural layout, reduces the number of parts and reduces the development cost on the premise of ensuring effective sealing between a ball valve sealing element and a valve body.
The technical scheme adopted by the invention is as follows: the utility model provides a ball valve seal structure for thermal management module, includes thermal management module casing and installs the ball valve in thermal management module casing which characterized in that: sealing elements are arranged between the ball valve and corresponding flow passages on the thermal management module shell, and the sealing elements are fixedly arranged in positioning grooves on the thermal management module shell; the sealing element is integrally formed by injection molding of an injection molding grade ETFE material.
Preferably, the sealing element comprises a mounting part, a compression part and a sealing part, two sides of the mounting part are clamped in the positioning groove, and the middle part of the mounting part is provided with a through hole communicated with the flow channel; the sealing part is tightly attached to the spherical surface of the ball valve, and the compression part is arranged between the installation part and the sealing part.
Furthermore, the compression part is sunken towards the inner side of the flow passage in an arc manner.
Further, the wall thickness of the compressed part is 0.6mm or more.
Furthermore, the compression amount of the sealing element is more than or equal to 0.5mm, and the sealing pressure difference is less than or equal to 500 kpa.
Furthermore, the leakage amount is less than or equal to 500ml/min @20 kpa.
Further, the diameter of the ball valve is 60 mm.
The beneficial effects obtained by the invention are as follows: the sealing element is integrally formed by injection molding of an injection molding grade ETFE material, and compared with the traditional ball valve sealing assembly, the sealing element is simpler in structure, easy to assemble and particularly suitable for application occasions with limited space layout; the integrated injection molding process is adopted, so that the number of parts is reduced, the system tolerance of the assembly is reduced, and the sealing reliability is higher; the sealing element is integrally formed by injection molding of an injection-grade ETFE material, has certain elasticity and structural strength due to the arrangement of structural wall thickness, is in interference fit with the spherical surface of the ball valve body, and forms interactive pressure between the matched spherical surfaces, so that the opening and closing adjustment and sealing functions of the ball valve are realized; the material is an injection molding grade ETFE material, has balanced mechanical properties, tear resistance, tensile resistance, impact resistance, long expansion service life, good heat resistance and chemical resistance, good molding flowability, softness, elasticity, wear resistance, self-lubricating property and low surface friction coefficient, and the sealing element designed and developed by the material has stable performance indexes and good sealing property of sample experimental data (the sealing leakage index of the ball valve is less than or equal to 300ml/min @20kpa), thereby meeting the sealing performance requirement of a heat management valve body.
Drawings
FIG. 1 is a schematic diagram of a ball valve and seal assembly of a prior art thermal management module;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of the seal configuration;
FIG. 4 is a schematic view of the seal and ball valve mating;
FIGS. 5-7 are schematic illustrations of the installation of the thermal management module housing, ball valve and seal;
reference numerals: 1. a thermal management module housing; 11. positioning a groove; 2. a ball valve; 3. a seal member; 31. an installation part; 32. a compression section; 33. a sealing part; 4. an upper housing; 10. a rubber elastomer; 20. a resin support ring; 30. a resin seal ring.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the conventional thermal management module includes a thermal management module assembly housing a, a sealing assembly, a pipeline housing B and a pipeline housing C, wherein the sealing assembly is composed of an EPDM rubber elastomer, a resin support ring (PPS in common use) and a resin seal ring (PVDF or PTFE in common use), in order to facilitate product assembly, the thermal management module assembly housing a, the pipeline housing B and the pipeline housing C must be made into a split structure, and symmetrical installation positioning grooves are processed on the pipeline housing to position the ball valve sealing assembly, and the assembly of the sealing assembly and the subsequent assembly of the ball valve main body need to add complicated tools to implement, which mainly has the following limitations: 1. the product space layout needs to be larger, so that a TMM (thermal management module) assembly shell and a pipeline shell can be conveniently made into a split structure, a fastener and a sealing element are connected between the newly-added shells, and a special tool needs to be added for product assembly to realize positioning assistance; 2. under the same sealing effect, the number of parts is increased by the combination of the three-piece sealing element and the newly added sealing element and connecting element between the shells, the development cost and the process assembly cost of the parts are correspondingly increased, and the cost optimization of the TMM assembly is not facilitated.
At present, the latest leakage required by a customer is less than or equal to 500ml/min @20kpa, but the sealing ring of the existing heat management module on the market can only achieve the leakage of the opening of the sealing ball valve which is less than or equal to 1000ml/min @20kpa, and cannot meet the requirement of the customer.
As shown in fig. 2-4, the invention provides a ball valve sealing structure for a thermal management module, which comprises a thermal management module housing 1 and a ball valve 2 installed in the thermal management module housing, wherein sealing elements 3 are respectively arranged between the ball valve 2 and corresponding flow passages on the thermal management module housing 1, and the sealing elements 3 are fixedly installed in positioning grooves 11 on the thermal management module housing 1; sealing member 3 and 2 sphere interference fits realization sealings of valve body to realize each passageway flow control on the thermal management module casing 1 through the rotation angle of adjusting 2 valve bodies of rotatory ball valve. In the embodiment, the sealing element 3 is integrally formed by injection molding of an injection molding grade ETFE material, and compared with a traditional three-piece sealing assembly, the sealing element is simpler in structure, easy to assemble and particularly suitable for application occasions with limited space layout; and the integrated injection molding sealing element is adopted, so that the number of parts is reduced, the system tolerance of the assembly is reduced, and the sealing reliability is higher.
In one embodiment, the sealing member 3 comprises a mounting part 31, a compression part 32 and a sealing part 33, wherein two sides of the mounting part 31 are clamped in the positioning groove 11, and the middle part is provided with a through hole communicated with the flow channel; the sealing part 33 is of a trumpet-shaped structure, and an opening is tightly attached to the spherical surface of the ball valve 2 to keep sealing; the compression part 32 is arranged between the mounting part 31 and the sealing part 33, the whole sealing element 3 has certain elasticity and structural strength through the structure of the compression part 32, and the compression amount of the assembled sealing element 3 is more than or equal to 0.5 mm.
In the present embodiment, the compression portion 32 is depressed toward the inner side of the flow passage in an arc shape, and the wall thickness is gradually reduced, and the minimum wall thickness of the compression portion 32 is 0.6 mm.
In the embodiment, the diameter of the sealing element 3 matched with the ball valve 2 is 60mm, the sealing pressure difference is within 500kpa, and the actual measurement performance of the sample can reach 300ml/min @20 kpa.
As shown in fig. 5-7, the sealing member 3 of the present invention is integrally formed by injection molding, first, the sealing member 3 is pressed into the positioning groove 11 of the thermal management module housing 1; then, assembling and pressing the ball valve 2 until the center of the ball valve coincides with the center of the spherical surface of the sealing element 3, and completely attaching the spherical surface of the sealing element 3 to the spherical surface of the valve body 2; finally, the upper shell 4 is covered, and then the fixed installation can be completed.
The foregoing shows and describes the general principles and principal structural features of the present invention. The present invention is not limited to the above examples, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Here, it should be noted that the description of the above technical solutions is exemplary, the present specification may be embodied in different forms, and should not be construed as being limited to the technical solutions set forth herein. Rather, these descriptions are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solution of the present invention is limited only by the scope of the claims.
The shapes, sizes, ratios, angles, and numbers disclosed to describe aspects of the specification and claims are examples only, and thus, the specification and claims are not limited to the details shown. In the following description, when a detailed description of related known functions or configurations is determined to unnecessarily obscure the focus of the present specification and claims, the detailed description will be omitted.
Where the terms "comprising", "having" and "including" are used in this specification, there may be another part or parts unless otherwise stated, and the terms used may generally be in the singular but may also be in the plural.
It should be noted that although the terms "first," "second," "top," "bottom," "side," "other," "end," "other end," and the like may be used and used in this specification to describe various components, these components and parts should not be limited by these terms. These terms are only used to distinguish one element or section from another element or section. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, with the top and bottom elements being interchangeable or switchable with one another, where appropriate, without departing from the scope of the present description; the components at one end and the other end may be of the same or different properties to each other.
In describing positional relationships, for example, when positional sequences are described as being "on.. above", "over.. below", "below", and "next", unless such words or terms are used as "exactly" or "directly", they may include cases where there is no contact or contact therebetween. If a first element is referred to as being "on" a second element, that does not mean that the first element must be above the second element in the figures. The upper and lower portions of the component will change depending on the angle of view and the orientation. Thus, in the drawings or in actual construction, if a first element is referred to as being "on" a second element, it can be said that the first element is "under" the second element and the first element is "over" the second element. In describing temporal relationships, unless "exactly" or "directly" is used, the description of "after", "subsequently", and "before" may include instances where there is no discontinuity between steps. The features of the various embodiments of the present invention may be partially or fully combined or spliced with each other and performed in a variety of different configurations as will be well understood by those skilled in the art. Embodiments of the invention may be performed independently of each other or may be performed together in an interdependent relationship.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the above-described embodiments, but that many variations are possible. Any simple modification, equivalent change and modification made to the above embodiments in accordance with the technical spirit of the present invention should be considered to be within the scope of the present invention.
Claims (7)
1. The utility model provides a ball valve seal structure for thermal management module, includes thermal management module casing and installs the ball valve in thermal management module casing which characterized in that: sealing elements are arranged between the ball valve and corresponding flow passages on the thermal management module shell, and the sealing elements are fixedly arranged in positioning grooves on the thermal management module shell; the sealing element is integrally formed by injection molding of an injection molding grade ETFE material.
2. The ball valve sealing structure for a thermal management module according to claim 1, wherein: the sealing element comprises a mounting part, a compression part and a sealing part, wherein two sides of the mounting part are clamped in the positioning groove, and the middle part of the mounting part is provided with a through hole communicated with the flow channel; the sealing part is tightly attached to the spherical surface of the ball valve, and the compression part is arranged between the installation part and the sealing part.
3. The ball valve sealing structure for a thermal management module according to claim 2, wherein: the compression part is sunken towards the inner side of the flow passage.
4. A ball valve sealing structure for a thermal management module according to claim 3, wherein: the wall thickness of the compression part is more than or equal to 0.6 mm.
5. The ball valve seal structure for a thermal management module of claim 1, wherein: the compression amount of the sealing element is more than or equal to 0.5mm, and the sealing pressure difference is less than or equal to 500 kpa.
6. The ball valve sealing structure for a thermal management module according to claim 1, wherein: the leakage is less than or equal to 500ml/min @20 kpa.
7. The ball valve sealing structure for a thermal management module according to claim 1, wherein: the diameter of the ball valve is 60 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111622668.6A CN114439965A (en) | 2021-12-28 | 2021-12-28 | Ball valve sealing structure for thermal management module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111622668.6A CN114439965A (en) | 2021-12-28 | 2021-12-28 | Ball valve sealing structure for thermal management module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114439965A true CN114439965A (en) | 2022-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111622668.6A Pending CN114439965A (en) | 2021-12-28 | 2021-12-28 | Ball valve sealing structure for thermal management module |
Country Status (1)
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| CN (1) | CN114439965A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3522930A (en) * | 1967-05-30 | 1970-08-04 | Richards & Co B C | Rotary ball valve and seal therefor |
| GB8315269D0 (en) * | 1983-06-03 | 1983-07-06 | Nh Eng Ltd | Ball valve seals |
| CN201764002U (en) * | 2010-09-19 | 2011-03-16 | 浙江超达阀门股份有限公司 | Metal hard sealing ball valve |
| CN102032357A (en) * | 2010-12-14 | 2011-04-27 | 江苏江华阀业有限公司 | Non-leakage fully-lined ball valve |
| CN205446795U (en) * | 2016-04-12 | 2016-08-10 | 浙江精杰实业有限公司 | Ball valve structure that metal is sealed firmly |
| CN207093833U (en) * | 2017-08-17 | 2018-03-13 | 上海飞龙新能源汽车部件有限公司 | A kind of dynamic sealing mechanism for ball valve |
| CN208107206U (en) * | 2018-03-29 | 2018-11-16 | 昌奇(上海)仪器仪表有限公司 | A kind of enhanced more back seal ball valve sealing structures of segmentation structure |
| WO2020138073A1 (en) * | 2018-12-25 | 2020-07-02 | Ntn株式会社 | Flow control valve seal and flow control valve device |
| CN211174315U (en) * | 2019-11-25 | 2020-08-04 | 东风富士汤姆森调温器有限公司 | Water temperature control equipment for engine |
| CN212297704U (en) * | 2020-04-22 | 2021-01-05 | 宁波市仪表阀门厂 | High-reliability ball valve sealing structure |
| CN213628979U (en) * | 2020-09-07 | 2021-07-06 | 中山铁王流体控制设备有限公司 | Ball valve |
-
2021
- 2021-12-28 CN CN202111622668.6A patent/CN114439965A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3522930A (en) * | 1967-05-30 | 1970-08-04 | Richards & Co B C | Rotary ball valve and seal therefor |
| GB8315269D0 (en) * | 1983-06-03 | 1983-07-06 | Nh Eng Ltd | Ball valve seals |
| CN201764002U (en) * | 2010-09-19 | 2011-03-16 | 浙江超达阀门股份有限公司 | Metal hard sealing ball valve |
| CN102032357A (en) * | 2010-12-14 | 2011-04-27 | 江苏江华阀业有限公司 | Non-leakage fully-lined ball valve |
| CN205446795U (en) * | 2016-04-12 | 2016-08-10 | 浙江精杰实业有限公司 | Ball valve structure that metal is sealed firmly |
| CN207093833U (en) * | 2017-08-17 | 2018-03-13 | 上海飞龙新能源汽车部件有限公司 | A kind of dynamic sealing mechanism for ball valve |
| CN208107206U (en) * | 2018-03-29 | 2018-11-16 | 昌奇(上海)仪器仪表有限公司 | A kind of enhanced more back seal ball valve sealing structures of segmentation structure |
| WO2020138073A1 (en) * | 2018-12-25 | 2020-07-02 | Ntn株式会社 | Flow control valve seal and flow control valve device |
| CN211174315U (en) * | 2019-11-25 | 2020-08-04 | 东风富士汤姆森调温器有限公司 | Water temperature control equipment for engine |
| CN212297704U (en) * | 2020-04-22 | 2021-01-05 | 宁波市仪表阀门厂 | High-reliability ball valve sealing structure |
| CN213628979U (en) * | 2020-09-07 | 2021-07-06 | 中山铁王流体控制设备有限公司 | Ball valve |
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Effective date of registration: 20240129 Address after: No. 51 Fengshu Second Road, Wuhan Economic and Technological Development Zone, Wuhan City, Hubei Province, 430056 Applicant after: DONGFENG FUJI THOMSON THERMOSTAT Co.,Ltd. Country or region after: China Applicant after: DONGFENG MOTOR PARTS AND COMPONENTS GROUP Co.,Ltd. Address before: 430056 No.51, fengshuer Road, Wuhan Economic and Technological Development Zone, Hubei Province Applicant before: DONGFENG FUJI THOMSON THERMOSTAT Co.,Ltd. Country or region before: China |
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