CN112536732A - Tool for plugging interface of closed container - Google Patents
Tool for plugging interface of closed container Download PDFInfo
- Publication number
- CN112536732A CN112536732A CN202011448271.5A CN202011448271A CN112536732A CN 112536732 A CN112536732 A CN 112536732A CN 202011448271 A CN202011448271 A CN 202011448271A CN 112536732 A CN112536732 A CN 112536732A
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- Prior art keywords
- tool
- interface
- tool body
- sealing
- closed container
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- 238000007789 sealing Methods 0.000 claims abstract description 79
- 238000003825 pressing Methods 0.000 claims abstract description 48
- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 239000003566 sealing material Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 229920000126 latex Polymers 0.000 claims description 3
- 239000004816 latex Substances 0.000 claims description 3
- 239000005060 rubber Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 238000004140 cleaning Methods 0.000 abstract description 9
- 230000000149 penetrating effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 3
- 238000005488 sandblasting Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention relates to a tool for plugging the mouth of a closed container, comprising: a tool body including left and right ends spaced apart in an axial direction; a transmission member axially penetrating the tool body; the pressing component is arranged outside the left end of the tool main body and is connected with the left end of the transmission component; the control component is arranged outside the right end of the tool main body and is connected with the right end of the transmission component; a sealing member provided between the tool body and the pressing member; wherein the manipulation member is capable of being manipulated such that the pressure application member axially compresses the sealing member, the sealing member radially expands and seals the interface. The tool provided by the invention can solve the problems of high rejection rate and poor sealing performance of the existing tool, the rejection rate of the tool is reduced, the tool can be suitable for interfaces with different sizes, the risk of damaging the interfaces of the closed container after the content is leaked is reduced, and the labor cost and the time cost caused by cleaning the interfaces of the closed container are reduced.
Description
Technical Field
The invention belongs to the technical field of pipeline accessories, and particularly relates to a tool for plugging a connector of a closed container.
Background
In the production process of the closed container, a tool is required to seal the interface of the closed container, and the tool for sealing the interface of the closed container in the prior art mainly comprises a hard tool main body and a sealing part which is arranged at the end part of the tool main body and is made of elastic sealing materials. When the tool body is inserted into the interface, the sealing part can be compressed by the inner wall of the interface and elastically deforms so as to be in interference fit with the inner wall of the interface, however, the tool for plugging the interface of the closed container has higher requirements on the machining precision of the tool, the sealing effect of the sealing part on the interface is limited, and the phenomenon of leakage at the interface of the closed container occurs at the moment, so that the rejection rate of the tool is increased, the risk of damaging the interface of the closed container after the content of the closed container leaks is increased, or the labor cost and the time cost caused by cleaning the interface of the closed container are increased.
For example, in order to improve the surface performance of the inner wall of the closed container, the closed container represented by a water tank liner of a water heater is usually subjected to sand blasting treatment in the manufacturing process, a tool is required to be used for plugging the interface of the closed container in the process, once the sealing performance of the tool is slightly insufficient, gravel possibly enters the inner side of the interface of the closed container and abrades the interface of the closed container, so that an operator has to blow sand to the interface to clean the interface of the closed container, and the labor cost and the time cost of the process of producing the closed container are increased.
Disclosure of Invention
In order to solve all or part of the problems, the invention aims to provide a tool for plugging an interface of a closed container, which is used for solving the problems of high rejection rate and poor sealing performance of the existing tool, so that the rejection rate of the tool is reduced, the tool can be suitable for interfaces with different sizes in a certain range, the risk of damaging the interface of the closed container after the content leaks is reduced, and the labor cost and the time cost caused by cleaning the interface of the closed container are reduced.
The invention provides a tool for plugging an interface of a closed container, which comprises: a tool body including left and right ends spaced apart in an axial direction; a transmission member axially extending through the tool body and having left and right ends; the pressing component is arranged outside the left end of the tool main body and is connected with the left end of the transmission component; the control component is arranged outside the right end of the tool main body and is connected with the right end of the transmission component; a sealing member which is provided between the tool body and the pressing member and is made of an elastic sealing material; wherein the manipulation member is configured to be manipulated to drive the pressing member closer to the tool body via the transmission member such that the pressing member can axially compress the sealing member with the aid of the tool body, thereby enabling the sealing member to radially expand and seal within the interface.
Further, the transmission component is a central pull rod, so that the sealing component can be sleeved on the central pull rod between the tool main body and the pressing component.
Further, a thread structure is arranged at the left end of the central pull rod, and the pressing component is a nut screwed on the thread structure.
Further, the control component comprises a rocker component which is hinged on the right end of the transmission component and can rotate between a first stop position and a second stop position, the rocker component can be controlled and can rotate back and forth between the first stop position and the second stop position, so that the transmission component is driven by the rocker component to do back and forth axial movement in the tool main body, and further the relative distance between the pressing component and the tool main body is changed to implement axial compression and axial release of the sealing component.
Further, when the rocker member is in the first rest position, it is coaxial with the central pull rod, and the relative distance between the pressing member and the tool body reaches the maximum value, and when the rocker member is in the second rest position, it is perpendicular to the central pull rod, and the relative distance between the pressing member and the tool body reaches the minimum value.
Further, the elastic sealing material is rubber, silica gel or latex.
Further, the sealing part is of a hollow circular ring structure.
Further, the outer diameter of the sealing component before being compressed by the pressing component and the tool body is smaller than or equal to the inner diameter of the interface.
Further, the tool further comprises a positioning flange arranged on the peripheral wall of the tool main body, and the positioning flange can abut against the port of the interface and limit the insertion depth of the port when the tool main body, the pressing component and the sealing component are jointly inserted into the interface.
Further, the interface includes the interface body and establishes screw thread structure and reducing flange on the internal perisporium of interface body, wherein, reducing flange is closer to the inner chamber of airtight container than screw thread structure, makes when the location flange supports and leans on the port department of interface, sealing member is in reducing flange and can be here compressed by pressing member and tool main part jointly and seal the interface.
According to the technical scheme, the tool for plugging the interface of the closed container, provided by the invention, is additionally provided with the transmission component which penetrates through the tool body along the axial direction, the pressing component which is arranged outside the left end of the tool body and is connected with the left end of the transmission component, and the control component which is arranged outside the sealing component and the right end of the tool body and is connected with the right end of the transmission component, on the basis of the prior art, and the sealing component is arranged between the tool body and the pressing component. When the outer diameter of the tool is smaller than the diameter of the inner wall of the interface or the pressing force of the sealing part on the inner wall of the interface is insufficient, the tool allows an operator to control the control part and drive the pressing part to be close to the tool body by means of the transmission part, so that the pressing part can axially compress the sealing part under the assistance of the tool body, the sealing part is radially expanded, the sealing effect of the sealing part on the inner wall of the interface is improved, the application range of the tool is expanded, the rejection rate of the tool is reduced, the risk that the interface of the sealed container is damaged after the leakage of the content is reduced, and meanwhile, the labor cost and the time cost caused by cleaning the interface of the sealed container are. In addition, the tool provided by the invention has the advantages that the control component is arranged at the right end of the tool main body, so that the control component is prevented from being interfered by a port of the closed container or other components of the tool when being controlled, an operator is allowed to rotate the control component without hindrance, and the radial dimension of the sealing component is adjusted. Therefore, the tool for plugging the interface of the closed container can solve the problems of small application range, high rejection rate and poor sealing performance of the existing tool, so that the rejection rate of the tool is reduced, the tool can be suitable for the interfaces with different sizes in a certain range, the risk of damaging the interface of the closed container after the content leaks is reduced, and the labor cost and the time cost caused by cleaning the interface of the closed container are reduced.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the figure:
FIG. 1 is a schematic structural diagram of a tool for plugging a port of a closed container according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the tool in an in-use condition of the embodiment of the present invention with the rocker member in a first rest position;
FIG. 3 is a cross-sectional view of the tool in an in-use condition of the embodiment of the present invention with the rocker member in a second rest position.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
Fig. 1 is a schematic structural diagram of a tool for plugging a port of a closed container according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the tool in an in-use condition of the embodiment of the present invention with the rocker member in a first rest position. As shown in fig. 1 and 2, the tool 100 of the present embodiment is primarily used to seal off the interface of a containment vessel, preferably but not limited to a water heater tank liner. The tool 100 mainly includes a tool body 1, a transmission member 2, a pressing member 3, an operation member 4, and a sealing member 5. Wherein the tool body 1 comprises a left end and a right end spaced apart in the axial direction. The transmission member 2 penetrates the tool body 1 in the axial direction and has left and right ends. The pressing member 3 is provided outside the left end of the tool body 1 and connected to the left end of the transmission member 2. The manipulation member 4 is disposed outside the right end of the tool body 1 and connected to the right end of the transmission member 2. The seal member 5 is provided between the tool body 1 and the pressing member 3 and is made of an elastic seal material. Wherein the handling member 4 is configured to be handled to drive the pressing member 3 close to the tool body 1 by means of the transmission member 2, such that the pressing member 3 can axially compress the sealing member 5 with the aid of the tool body 1, thereby enabling the sealing member 5 to radially expand and seal within the interface 200.
The tool 100 of the embodiment of the invention allows an operator to operate the operation component 4 and drive the pressing component 3 to be close to the tool body 1 by the transmission component 2 when the outer diameter of the tool 100 is smaller than the diameter of the inner wall of the interface 200 or the pressing force of the sealing component 5 to the inner wall of the interface is insufficient, so that the pressing component 3 can axially compress the sealing component 5 with the help of the tool body 1, and further the sealing component 5 radially expands, thereby improving the sealing effect of the sealing component 5 to the inner wall of the interface, expanding the application range of the tool, reducing the rejection rate of the tool, reducing the risk of damaging the interface of the sealed container after the leakage of the content, and simultaneously reducing labor cost and time cost caused by cleaning the interface of the sealed container. And because the tool provided by the invention arranges the control component at the right end of the tool body, the interference of the control component 4 by the interface of the closed container or other components of the tool when being controlled is avoided, thereby allowing an operator to rotate the control component 4 without hindrance and adjusting the radial dimension of the sealing component 5.
When the closed container is selected to be a container needing sand blasting, such as a water tank liner of a water heater, the tool 100 disclosed by the embodiment of the invention allows an operator to operate and control the control component to ensure that the sealing component 5 can firmly and reliably seal the interface, so that the risk that gravel enters the inner side of the interface of the closed container and abrades the interface of the closed container due to insufficient sealing performance of the tool can be greatly reduced, the frequency of sand blasting treatment on the interface for cleaning the interface of the closed container by the operator is obviously reduced, and the manual cost and the time cost are avoided. Therefore, the tool for plugging the interface of the closed container can solve the problems of small application range, high rejection rate and poor sealing performance of the existing tool, so that the rejection rate of the tool is reduced, the tool can be suitable for the interfaces with different sizes in a certain range, the risk of damaging the interface of the closed container after the content leaks is reduced, and the labor cost and the time cost caused by cleaning the interface of the closed container are reduced.
In this embodiment, the transmission member 2 is a center pull rod, so that the sealing member 5 can be fitted over the center pull rod between the tool body 1 and the pressing member 3. The central pull rod can be selected from a solid straight rod or a hollow straight pipe with a circular cross section, and is preferably a hollow straight pipe with material saving. Preferably, a screw structure 21 is provided on the left end of the center rod, and the pressing member 3 is a nut screwed on the screw structure 21, which enables the center rod and the pressing structure to be firmly and reliably connected by means of the screw structure 21, and also allows an operator to conveniently and quickly replace the sealing member 5 by unscrewing the nut when the sealing member 5 is damaged.
As shown in fig. 2 and 3, in the present embodiment, the operating member 4 includes a rocker member hinged on the right end of the transmission member 2 and capable of rotating between a first stop position and a second stop position, and the rocker member can be operated and can perform reciprocating rotation between the first stop position and the second stop position, so that the transmission member 2 is driven by the rocker member to perform reciprocating axial movement in the tool body 1, and further, the relative distance between the pressing member 3 and the tool body 1 is changed to implement axial compression and axial release of the sealing member 5. When the rocker member is operated to switch from the first stop position to the second stop position, the rocker member can drive the central pull rod to move close to the tool body 1, so that the nut is also close to the tool body 1 and can axially compress the sealing member 5 with the aid of the tool body 1, and further the sealing member 5 can radially expand and seal the interface 200. When the rocker member is operated to switch from the second stop position to the first stop position, the rocker member can drive the central pull rod to move away from the tool body 1, so that the nut is also away from the tool body 1 and can axially release the sealing member 5 with the aid of the tool body 1, and further the sealing member 5 can radially contract with the aid of the elastic restoring force of the nut and release the sealing of the inner wall of the interface, so that the tool 100 can be taken out of the interface 200.
In this embodiment, when the rocker member is in the first rest position, coaxial with the central pull rod, the relative distance of the pressing member 3 from the tool body 1 is at a maximum and the outer diameter of the sealing member 5 is at a minimum. When the rocker member is in the second rest position, it is perpendicular to the central pull rod, the relative distance between the pressing member 3 and the tool body 1 reaches a minimum value, and the outer diameter of the sealing member 5 reaches a maximum value. To enable the tool 100 to function as described above, the rocker member preferably further comprises a rod portion and a U-shaped block disposed on the left end of the rod portion, the open end of the U-shaped block being adapted to receive the end of the center link and being hinged thereto by a screw. The screw is preferably a hexagon screw so as to reduce the risk that the screw and the U-shaped block slide relatively to influence the pressing effect. This facilitates the operator to easily adjust the radial dimension of the seal member 5 and seal the interface 200 by means of a labor-saving rocker member structure, and also facilitates the operator to intuitively determine the amount of radial expansion of the seal member 5 by means of the angle between the rocker member and the center tie.
In this embodiment, the elastic sealing material is rubber, silicone rubber, or latex, and preferably silicone rubber having excellent weather resistance and low-temperature resistance. The shape of the sealing member 5 may be selected according to the shape of the inner wall of the interface 200, but a hollow circular ring structure is preferred, which allows the sealing member 5 to easily expand radially when compressed axially by the tool body 1 and the pressing member 3, and helps to ensure that the sealing member 5 expands equally in each radial direction, thereby further improving the stability of the sealing of the interface 200 by the tool 100. Preferably, the outer diameter of the sealing member 5 before being compressed by the pressing member 3 and the tool body 1 is smaller than or equal to the inner diameter of the interface 200, which enables the sealing member 5 to be disengaged from the inner wall of the interface 200 when the tool body 1 and the pressing member release the sealing member 5, thereby facilitating the tool 100 with the rocker member in the second resting position to be smoothly taken out of the interface 200.
In the present embodiment, preferably, the tool body 1 is a cylinder, and the tool 100 further includes a positioning flange 6 provided on the outer peripheral wall of the tool body 1, wherein the positioning flange 6 is capable of abutting against the port of the interface 200 and limiting the insertion depth thereof when the tool body 1, the pressing member 3 and the sealing member 5 are collectively inserted into the interface 200. To avoid over or under insertion of the tool 100. Preferably, the interface 200 comprises an interface body and a thread structure and a reducing flange 201 arranged on the inner peripheral wall of the interface body, wherein the reducing flange is closer to the inner cavity of the closed container than the thread structure, so that when the positioning flange 6 abuts against the port opening of the interface 200, the sealing part 5 is positioned in the reducing flange 201 and can be compressed by the pressing part 3 and the tool main body 1 together to seal the interface 200, and the structure is commonly found in the water tank liner of the water heater. When the tool 100 of the embodiment of the invention is used in the water heater tank liner, the risk that the thread structure on the inner peripheral wall of the interface body of the water heater tank liner is damaged by leaked contents can be effectively reduced, and the service life of the water heater tank liner can be prolonged. The method of use of the tool 100 of the present invention is described next: first, the tool 100 is inserted into the mouthpiece 200 of the closed container, and the positioning flange 6 provided on the outer peripheral wall of the tool body 1 abuts against the port of the mouthpiece 200 and limits the insertion depth thereof, so that the sealing member 5 is located within the reduced diameter flange 201, with the rocker member in the first rest position. The rocker member is manipulated and switched from the first stop position to the second stop position, so that the rocker member drives the nut through the central pull rod to move close to the tool body 1, so that the nut can axially compress the sealing member 5 with the aid of the tool body 1, and further the sealing member 5 can radially expand, and the sealing member 5 is located in the reducing flange 201, so that the sealing member 5 can be compressed by the nut and the tool body 1 together to seal the interface 200. When the tool 100 needs to be taken down, the rocker part is switched from the second stop position to the first stop position, the rocker part can drive the nut to move away from the tool body 1 through the central pull rod, so that the nut can axially release the sealing part 5 under the assistance of the tool body 1, further the sealing part 5 can radially contract with the help of the elastic restoring force of the nut, and the sealing part 5 is separated from the reducing flange 201 of the interface 200, so that the tool 100 can be taken out of the interface 200 conveniently.
In summary, the tool 100 according to the embodiment of the present invention can solve the problems of small application range, high rejection rate and poor sealing performance of the existing tool, thereby reducing the rejection rate of the tool, enabling the tool to be applicable to interfaces of different sizes within a certain range, being helpful to reduce the risk of damaging the interfaces of the sealed container after the contents are leaked, and reducing labor cost and time cost caused by cleaning the interfaces of the sealed container.
In the description of the present application, it is to be understood that the terms "center," "left," "right," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the positional or orientational relationships indicated in the drawings for the purposes of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A tool for plugging the mouth of a closed container, comprising:
a tool body including left and right ends spaced apart in an axial direction;
a transmission member axially extending through the tool body and having left and right ends;
the pressing component is arranged outside the left end of the tool main body and is connected with the left end of the transmission component;
the control component is arranged outside the right end of the tool main body and is connected with the right end of the transmission component;
a sealing member which is provided between the tool body and the pressing member and is made of an elastic sealing material;
wherein the manipulation member is configured to be manipulated to drive the pressing member closer to the tool body via the transmission member such that the pressing member can axially compress the sealing member with the aid of the tool body, thereby enabling the sealing member to radially expand and seal within the interface.
2. The tool of claim 1, wherein the transmission member is a center pull rod such that the sealing member can be sleeved over the center pull rod between the tool body and the pressure applying member.
3. The tool of claim 2, wherein a threaded structure is provided on the left end of the center tie rod, and the pressing member is a nut screwed on the threaded structure.
4. The tool of claim 2, wherein the actuation member includes a rocker member hinged to the right end of the transmission member and rotatable between a first rest position and a second rest position, the rocker member being operable and reciprocally rotatable between the first and second rest positions to cause the transmission member to be driven by the same for reciprocal axial movement in the tool body to vary the relative distance of the pressing member to the tool body to effect axial compression and axial release of the sealing member.
5. A tool according to claim 4, wherein the rocker member is coaxial with the central pull rod when in the first rest position, the relative distance of the pressure applying member from the tool body being at a maximum, and wherein the rocker member is perpendicular to the central pull rod when in the second rest position, the relative distance of the pressure applying member from the tool body being at a minimum.
6. The tool of any one of claims 1 to 5, wherein the resilient sealing material is rubber, silicone or latex.
7. A tool according to any one of claims 1 to 5, wherein the sealing member is of hollow annular configuration.
8. The tool of claim 7, wherein an outer diameter of the sealing member before being compressed by the pressing member and the tool body is equal to or less than an inner diameter of the interface.
9. The tool of any one of claims 1 to 5, further comprising a positioning flange provided on an outer peripheral wall of the tool body, the positioning flange being capable of abutting against and limiting an insertion depth of the port of the interface when the tool body, the pressing member and the sealing member are co-inserted into the interface.
10. The tool of claim 9, wherein the interface comprises an interface body and a thread structure and a reduced diameter flange provided on an inner peripheral wall of the interface body, wherein the reduced diameter flange is closer to the inner cavity of the closed container than the thread structure, such that when the positioning flange abuts against the port of the interface, the sealing member is within the reduced diameter flange and can be compressed there by the pressing member and the tool body together to seal the interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011448271.5A CN112536732A (en) | 2020-12-09 | 2020-12-09 | Tool for plugging interface of closed container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011448271.5A CN112536732A (en) | 2020-12-09 | 2020-12-09 | Tool for plugging interface of closed container |
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| CN112536732A true CN112536732A (en) | 2021-03-23 |
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|---|---|---|---|
| CN202011448271.5A Pending CN112536732A (en) | 2020-12-09 | 2020-12-09 | Tool for plugging interface of closed container |
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