CN220323452U - Side-expansion temperature rise tool for ring main unit test and ring main unit equipment - Google Patents
Side-expansion temperature rise tool for ring main unit test and ring main unit equipment Download PDFInfo
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- CN220323452U CN220323452U CN202321835375.0U CN202321835375U CN220323452U CN 220323452 U CN220323452 U CN 220323452U CN 202321835375 U CN202321835375 U CN 202321835375U CN 220323452 U CN220323452 U CN 220323452U
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- copper bar
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- 238000012360 testing method Methods 0.000 title claims abstract description 52
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 98
- 229910052802 copper Inorganic materials 0.000 claims abstract description 98
- 239000010949 copper Substances 0.000 claims abstract description 98
- 230000007704 transition Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract description 3
- 230000005684 electric field Effects 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a side-expansion temperature rise tool for ring main unit test and ring main unit equipment, comprising at least one tool side-expansion sleeve, a side-expansion connecting piece, a copper bar and a short-circuit bar; at least one tooling side expansion sleeve is arranged on the gas tank of the ring main unit; the side expansion connecting piece is arranged between the gas tank of the ring main unit and the tooling side expansion sleeve; one end of the copper bar is connected with at least one tooling side expansion sleeve, and the other end of the copper bar is connected with the short circuit bar. The technical scheme of this application utilizes current frock side to expand sleeve pipe, side to expand connecting piece and copper bar preparation temporary temperature rise frock, can carry out the temperature rise test through this temperature rise frock. Therefore, on one hand, the sleeve can be utilized in a temperature rise test, and on the other hand, the conventional ring main unit can be subjected to a temporary temperature rise test through a temperature rise tool, so that the temperature rise test is simpler.
Description
Technical Field
The utility model relates to the technical field of ring main unit temperature rise, in particular to a side-expansion temperature rise tool for ring main unit test and ring main unit equipment.
Background
In order to improve the power supply reliability, a user can obtain power from two directions, and a power supply network is generally connected into a ring shape. This power supply mode is simply referred to as ring network power supply. In power distribution systems of industrial and mining enterprises, residential communities, ports, high-rise buildings and the like, a high-voltage loop is usually controlled by a load switch or a vacuum contactor and is provided with high-voltage fuse protection. The system is usually powered by a ring network, and the used high-voltage switch cabinet is commonly and customarily called a ring main unit. The ring main unit is characterized in that a group of high-voltage switch equipment is arranged in the copper metal cabinet body or is made into an assembled interval ring main power supply unit, and the ring main unit has the advantages of simple structure, small volume, low price, capability of improving power supply parameters and performance, power supply safety and the like.
When the ring main unit is put into use, various tests need to be carried out, wherein the temperature rise test is an important test in electric products and is also an important index. The over-high temperature rise of the parts can change the physical and chemical properties of the material, reduce the mechanical properties and the electrical properties, and finally cause the working failure of the electrical products and even serious accidents. Therefore, strict regulations are imposed on the temperature rise values of all the components in the ring main unit. The existing ring main unit product has a plurality of side-expanded sleeves, but part of the sleeves are less in use, and the sleeves with less use are not provided with special tools for temperature rise tests.
Disclosure of Invention
In view of the above problems, the application provides a side-expansion temperature rise tool for ring main unit test and ring main unit equipment, which are used for solving the technical problems that the types of side-expansion sleeves are more, but the use amount of part of sleeves is less, and the sleeves with less use amount are not provided with special tools for temperature rise test.
In order to achieve the above object, in a first aspect, the present inventors provide a side-expansion temperature rise tooling for ring main unit test, which comprises at least one tooling side-expansion sleeve, a side-expansion connecting piece, a copper bar and a shorting bar; at least one tooling side expansion sleeve is arranged on the gas tank of the ring main unit; the side expansion connecting piece is arranged between the gas tank of the ring main unit and the tooling side expansion sleeve; one end of the copper bar is connected with at least one tooling side expansion sleeve, and the other end of the copper bar is connected with the short circuit bar.
Compared with the prior art, the technical scheme of the application utilizes the existing tooling side-expansion sleeve, side-expansion connecting pieces and copper bars to manufacture temporary temperature rise tooling, and can carry out temperature rise tests through the temperature rise tooling. Therefore, on one hand, the sleeve can be utilized in a temperature rise test, and on the other hand, the conventional ring main unit can be subjected to a temporary temperature rise test through a temperature rise tool, so that the temperature rise test is simpler.
As one embodiment of the utility model, the side-expansion temperature rise tooling for the ring main unit test further comprises a tooling mounting plate, and the tooling side-expansion sleeve is mounted on the air box of the ring main unit through the tooling mounting plate. Therefore, the tooling side expansion sleeve is connected with the tooling mounting plate, so that the mounting, dismounting and maintenance work of the temperature rise tooling are facilitated.
As one embodiment of the utility model, the tooling side expansion sleeve is mounted on the tooling mounting plate by bolts or welding studs. Thus, the tooling side expansion sleeve is conveniently arranged on the tooling mounting plate.
As one implementation mode of the utility model, the side expansion connecting piece is fixed between the air box of the ring main unit and the tooling side expansion sleeve through bolts. Therefore, the side expansion connecting piece is firmly arranged between the gas tank of the ring main unit and the tooling side expansion sleeve through the bolt, so that the side expansion connecting piece is more firmly installed.
As one implementation mode of the utility model, two ends of the copper bar are respectively connected with the tooling side expansion sleeve and the shorting bar through fasteners. Therefore, the two ends of the copper bar are conveniently and respectively arranged on the tooling side expansion sleeve and the short circuit bar through the fastener.
As an embodiment of the present utility model, the copper bars include at least one first copper bar and at least one second copper bar, one first copper bar or one second copper bar corresponds to one tooling side expansion pipe, and the at least one second copper bar and the at least one first copper bar face each other. Thus, according to the specific use scenario, different numbers of first copper bars and second copper bars can be set.
As one embodiment of the utility model, the copper bar comprises a sleeve connecting part and a short connecting part which are connected with each other, wherein the sleeve connecting part and the short connecting part are mutually perpendicular, so that the outline of the copper bar is L-shaped. Therefore, the profile of the copper bar is L-shaped, so that the two ends of the copper bar are more conveniently connected with the tooling side expansion sleeve and the short circuit bar respectively.
As one embodiment of the utility model, the arc transition is made at the junction of the sleeve connection and the short connection. Therefore, the electric field distribution uniformity near the copper bar is improved, and the local concentration of the electric field is avoided.
As one embodiment of the present utility model, the copper bar includes two first copper bars and one second copper bar, the two first copper bars being adjacently arranged. Therefore, through electric field simulation analysis and experiments, the uniformity of the electric field of the copper bar is improved through the arrangement of the copper bar, and the numerical value of the electric field strength is smaller, so that the copper bar has good dielectric withstand capacity, and the withstand voltage of the ring main unit can be improved.
To achieve the above objective, in a second aspect, the present utility model provides a ring main unit device, including a ring main unit and a side-expansion temperature-rising tool for ring main unit test provided by the present utility model, where the ring main unit includes an air box, and the side-expansion temperature-rising tool for ring main unit test is installed on the air box.
Compared with the prior art, the technical scheme of the application utilizes the existing tooling side-expansion sleeve, side-expansion connecting pieces and copper bars to manufacture temporary temperature rise tooling, and can carry out temperature rise tests through the temperature rise tooling. Therefore, on one hand, the sleeve can be utilized in a temperature rise test, and on the other hand, the conventional ring main unit can be subjected to a temporary temperature rise test through a temperature rise tool, so that the temperature rise test is simpler.
The foregoing summary is merely an overview of the present application, and is provided to enable one of ordinary skill in the art to make more clear the present application and to be practiced according to the teachings of the present application and to make more readily understood the above-described and other objects, features and advantages of the present application, as well as by reference to the following detailed description and accompanying drawings.
Drawings
The drawings are only for purposes of illustrating the principles, implementations, applications, features, and effects of the present application and are not to be construed as limiting the application.
In the drawings of the specification:
fig. 1 is a schematic structural diagram of a ring main unit device according to an embodiment of the present application;
FIG. 2 is a schematic view of a tooling-side diffuser sleeve according to one embodiment of the present disclosure disposed between an air box and the tooling-side diffuser sleeve;
fig. 3 is a schematic structural diagram of a side expansion removing connecting piece of a side expansion temperature rise tooling for ring main unit test according to an embodiment of the present application;
FIG. 4 is an enlarged view of A in FIG. 3;
fig. 5 is a schematic structural diagram of a copper bar according to an embodiment of the present application.
Reference numerals referred to in the above drawings are explained as follows:
100. ring main unit equipment;
1. side-expansion temperature rise tooling for ring main unit test;
11. tooling side-expanding sleeve;
12. a side spread connector;
121. a conductive member;
122. an insulating member;
13. a copper bar;
131. a first copper bar;
132. a second copper bar;
133. a sleeve connecting part;
134. a short connection part;
14. shorting bars;
15. a tool mounting plate;
2. an air box;
a. a first direction.
Detailed Description
In order to describe the possible application scenarios, technical principles, practical embodiments, and the like of the present application in detail, the following description is made with reference to the specific embodiments and the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples and are not intended to limit the scope of protection of the present application.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of the phrase "in various places in the specification are not necessarily all referring to the same embodiment, nor are they particularly limited to independence or relevance from other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in the embodiments may be combined in any manner to form a corresponding implementable technical solution.
Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application pertains; the use of related terms herein is for the description of specific embodiments only and is not intended to limit the present application.
In the description of the present application, the term "and/or" is a representation for describing a logical relationship between objects, which means that there may be three relationships, e.g., a and/or B, representing: there are three cases, a, B, and both a and B. In addition, the character "/" herein generally indicates that the front-to-back associated object is an "or" logical relationship.
In this application, terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual number, order, or sequence of such entities or operations.
Without further limitation, the use of the terms "comprising," "including," "having," or other like terms in this application is intended to cover a non-exclusive inclusion, such that a process, method, or article of manufacture that comprises a list of elements does not include additional elements but may include other elements not expressly listed or inherent to such process, method, or article of manufacture.
As in the understanding of the "examination guideline," the expressions "greater than", "less than", "exceeding", and the like are understood to exclude the present number in this application; the expressions "above", "below", "within" and the like are understood to include this number. Furthermore, in the description of the embodiments of the present application, the meaning of "a plurality of" is two or more (including two), and similarly, the expression "a plurality of" is also to be understood as such, for example, "a plurality of groups", "a plurality of" and the like, unless specifically defined otherwise.
In the description of the embodiments of the present application, spatially relative terms such as "center," "longitudinal," "transverse," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," etc., are used herein as terms of orientation or positional relationship based on the specific embodiments or figures, and are merely for convenience of description of the specific embodiments of the present application or ease of understanding of the reader, and do not indicate or imply that the devices or components referred to must have a particular position, a particular orientation, or be configured or operated in a particular orientation, and therefore are not to be construed as limiting of the embodiments of the present application.
Unless specifically stated or limited otherwise, in the description of the embodiments of the present application, the terms "mounted," "connected," "affixed," "disposed," and the like are to be construed broadly. For example, the "connection" may be a fixed connection, a detachable connection, or an integral arrangement; the device can be mechanically connected, electrically connected and communicated; it can be directly connected or indirectly connected through an intermediate medium; which may be a communication between two elements or an interaction between two elements. The specific meanings of the above terms in the embodiments of the present application can be understood by those skilled in the art to which the present application pertains according to the specific circumstances.
The ring main unit needs to be subjected to temperature rise test before being put into use, the existing ring main unit products have a plurality of side-expanded sleeves, but part of the sleeves are less in use, and the sleeves with less use are not used for the temperature rise test. The applicant found that the above problems produced a temporary temperature rise tooling through existing tooling side-expansion bushings, side-expansion connectors and copper bars.
According to some embodiments of the present application, referring to fig. 1, the present embodiment relates to a ring main unit device 100, including a ring main unit and a side-expanding temperature-rising tool 1 for ring main unit test, the ring main unit includes an air box 2, and the side-expanding temperature-rising tool 1 for ring main unit test is installed on the air box 2.
The ring main unit is a group of electric equipment (high-voltage switch equipment) which is arranged in a metal or nonmetal insulating cabinet body or is made into an assembled interval ring power supply unit. The looped netowrk cabinet includes gas tank 2 and experimental with side temperature rise frock 1 that expands of looped netowrk cabinet, as shown in fig. 1, installs the experimental with side temperature rise frock 1 that expands of looped netowrk cabinet in one side of gas tank 2.
The technical scheme of this application utilizes current frock side to expand sleeve pipe 11, side to expand connecting piece 12 and copper bar 13 preparation temporary temperature rise frock, can carry out the temperature rise test through this temperature rise frock. Therefore, on one hand, the sleeve can be utilized in a temperature rise test, and on the other hand, the conventional ring main unit can be subjected to a temporary temperature rise test through a temperature rise tool, so that the temperature rise test is simpler.
Referring to fig. 2 to 3, the embodiment further relates to a side-expansion temperature rise tooling 1 for ring main unit test, which comprises at least one tooling side-expansion sleeve 11, a side-expansion connecting piece 12, a copper bar 13 and a shorting bar 14; at least one tooling side expansion sleeve 11 is arranged on the gas tank 2 of the ring main unit; the side expansion connecting piece 12 is arranged between the gas tank 2 of the ring main unit and the tooling side expansion sleeve 11; one end of the copper bar 13 is connected with at least one tooling side expansion sleeve 11, and the other end of the copper bar 13 is connected with the short circuit bar 14.
The side-spread connecting member 12 includes a conductive member 121, and the conductive member 121 plays a conductive role. In some embodiments, the side-spreading connection 12 further comprises an insulating member 122, the insulating member 122 serving as an insulation, the insulating member 122 being arranged between the conductive member 121 and the tooling side-spreading sleeve 11.
The technical scheme of this application utilizes current frock side to expand sleeve pipe 11, side to expand connecting piece 12 and copper bar 13 preparation temporary temperature rise frock, can carry out the temperature rise test through this temperature rise frock. Therefore, on one hand, the sleeve can be utilized in a temperature rise test, and on the other hand, the conventional ring main unit can be subjected to a temporary temperature rise test through a temperature rise tool, so that the temperature rise test is simpler.
According to some embodiments of the present application, optionally, as shown in fig. 1 and 3, the side-expansion temperature-rising tool 1 for ring main unit test further includes a tool mounting plate 15, and the tool side-expansion sleeve 11 is mounted on the gas tank 2 of the ring main unit through the tool mounting plate 15. In this way, the tooling side expansion sleeve 11 is supported by the tooling mounting plate 15, so that the installation, the disassembly and the maintenance work of the temperature rise tooling are facilitated.
According to some embodiments of the present application, the tooling side extension tube 11 is optionally mounted on the tooling mounting plate 15 by bolts or weld studs. In this way, the tooling side expansion sleeve 11 is conveniently mounted on the tooling mounting plate 15. In some embodiments, the tooling side diffuser sleeve 11 may also be welded to the tooling mounting plate 15.
According to some embodiments of the present application, optionally, the side expansion joint 12 is fixed between the gas box 2 of the ring main unit and the tooling side expansion sleeve 11 by bolts. In this way, the side expansion connecting piece 12 is firmly arranged between the gas tank 2 of the ring main unit and the tooling side expansion sleeve 11 through the bolts, so that the side expansion connecting piece 12 is more firmly installed.
According to some embodiments of the present application, optionally, as shown in fig. 3 and 4, two ends of the copper bar 13 are respectively connected with the tooling side expansion sleeve 11 and the shorting bar 14 through fasteners. Therefore, the two ends of the copper bar 13 are conveniently and respectively arranged on the tooling side expansion sleeve 11 and the shorting bar 14 through the fasteners. In some embodiments, two ends of the copper bar 13 may also be welded to the tooling side extension pipe 11 and the shorting bar 14, respectively.
According to some embodiments of the present application, optionally, as shown in fig. 3, the copper bar 13 includes at least one first copper bar 131 and at least one second copper bar 132, where one first copper bar 131 or one second copper bar 132 corresponds to one tooling-side expansion pipe 11, and the at least one second copper bar 132 and the at least one first copper bar 131 face each other.
One first copper bar 131 or one second copper bar 132 corresponds to one tooling-side expansion pipe 11, for example: when the copper bar 13 includes two first copper bars 131 and one second copper bar 132, three tooling side expansion tubes 11 are required. In some embodiments, in order to enable connection of both the first copper bar 131 and the second copper bar 132 with the shorting bar 14, the shorting bar 14 is disposed to extend along the first direction a. In other embodiments, different numbers of first copper bars 131 and second copper bars 132 may be provided according to specific usage scenarios.
According to some embodiments of the present application, optionally, as shown in fig. 5, the copper bar 13 includes a sleeve connection portion 133 and a shorting connection portion 134 that are connected to each other, where the sleeve connection portion 133 and the shorting connection portion 134 are perpendicular to each other, so that the profile of the copper bar 13 is L-shaped. Wherein, sleeve connection portion 133 is connected with frock side expansion pipe 11, and short circuit connecting portion 134 is connected with short circuit row 14. In some embodiments, the copper bar 13 is integrally formed. Therefore, the profile of the copper bar 13 is L-shaped, so that two ends of the copper bar 13 are more conveniently connected with the tooling side expansion sleeve 11 and the short circuit bar 14 respectively.
According to some embodiments of the present application, optionally, as shown in fig. 5, the connection of the sleeve connection 133 and the shorting connection 134 may be rounded. Thus, the uniformity of electric field distribution near the copper bar 13 is improved, and local concentration of electric field is avoided.
According to some embodiments of the present application, optionally, as shown in fig. 3, the copper bar 13 includes two first copper bars 131 and one second copper bar 132, and the two first copper bars 131 are adjacently arranged. In some embodiments, the second copper bar 132 may be disposed in the middle, and the two first copper bars 131 may be disposed at two sides of the second copper bar 132. In other embodiments, the second copper bar 132 and one of the first copper bars 131 may be disposed in the same direction, and the other first copper bar 131 may be disposed in the opposite direction. Therefore, through electric field simulation analysis and experiments, the arrangement of the copper bars 13 improves the uniformity of the electric field of the copper bars 13, and the value of the electric field strength is smaller, so that the copper bars 13 have good dielectric withstand capability, and the withstand voltage of the ring main unit can be improved.
Those skilled in the art will appreciate that while some embodiments herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the present application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. The side expansion temperature rise tooling for the ring main unit test is characterized by comprising at least one tooling side expansion sleeve, a side expansion connecting piece, a copper bar and a short circuit bar;
at least one tooling side expansion sleeve is arranged on an air box of the ring main unit;
the side expansion connecting piece is arranged between the gas tank of the ring main unit and the tooling side expansion sleeve;
one end of the copper bar is connected with at least one tooling side expansion sleeve, and the other end of the copper bar is connected with the short circuit bar.
2. The side-expansion temperature-rise tooling for the ring main unit test according to claim 1, wherein the side-expansion temperature-rise tooling for the ring main unit test further comprises a tooling mounting plate, and the tooling side-expansion sleeve is mounted on an air box of the ring main unit through the tooling mounting plate.
3. The side-expansion temperature-rise tooling for ring main unit test according to claim 2, wherein the tooling side-expansion sleeve is mounted on a tooling mounting plate through bolts or welding studs.
4. The side-expansion temperature-rising tool for ring main unit test according to claim 1, wherein the side-expansion connecting piece is fixed between an air box of the ring main unit and a tool side-expansion sleeve through bolts.
5. The side-expansion temperature-rising tool for ring main unit test according to claim 1, wherein two ends of the copper bar are connected with the tool side-expansion sleeve and the shorting bar through fasteners respectively.
6. The side-expansion temperature rise tooling for ring main unit testing according to claim 1, wherein the copper bars comprise at least one first copper bar and at least one second copper bar, one first copper bar or one second copper bar corresponds to one tooling side-expansion sleeve, and at least one second copper bar and at least one first copper bar face each other.
7. The side-expansion temperature-rising tool for ring main unit test according to claim 6, wherein the copper bar comprises a sleeve connecting portion and a short-circuit connecting portion which are connected with each other, and the sleeve connecting portion is perpendicular to the short-circuit connecting portion, so that the profile of the copper bar is L-shaped.
8. The side-expansion temperature-rise tooling for ring main unit test according to claim 7, wherein the connection part of the sleeve connection part and the short connection part is in arc transition.
9. The side-expansion temperature rise tooling for ring main unit test according to claim 6, wherein the copper bars comprise two first copper bars and one second copper bar, and the two first copper bars are adjacently arranged.
10. The utility model provides a looped netowrk cabinet equipment, its characterized in that includes looped netowrk cabinet and the experimental side temperature rise frock of using of looped netowrk cabinet of any one of claims 1 to 9, the looped netowrk cabinet includes the gas tank, the experimental side temperature rise frock of using of looped netowrk cabinet is installed on the gas tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321835375.0U CN220323452U (en) | 2023-07-13 | 2023-07-13 | Side-expansion temperature rise tool for ring main unit test and ring main unit equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321835375.0U CN220323452U (en) | 2023-07-13 | 2023-07-13 | Side-expansion temperature rise tool for ring main unit test and ring main unit equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220323452U true CN220323452U (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321835375.0U Active CN220323452U (en) | 2023-07-13 | 2023-07-13 | Side-expansion temperature rise tool for ring main unit test and ring main unit equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220323452U (en) |
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2023
- 2023-07-13 CN CN202321835375.0U patent/CN220323452U/en active Active
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