CN220382573U - Sleeve for switchgear and switchgear - Google Patents
Sleeve for switchgear and switchgear Download PDFInfo
- Publication number
- CN220382573U CN220382573U CN202321843790.0U CN202321843790U CN220382573U CN 220382573 U CN220382573 U CN 220382573U CN 202321843790 U CN202321843790 U CN 202321843790U CN 220382573 U CN220382573 U CN 220382573U
- Authority
- CN
- China
- Prior art keywords
- box body
- sleeve
- positioning
- switchgear
- insulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000012212 insulator Substances 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims description 39
- 230000009286 beneficial effect Effects 0.000 abstract description 17
- 230000006872 improvement Effects 0.000 description 17
- 238000009434 installation Methods 0.000 description 10
- 230000005684 electric field Effects 0.000 description 6
- 230000002265 prevention Effects 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Switch Cases, Indication, And Locking (AREA)
Abstract
The utility model provides a sleeve for a switch device and the switch device, and belongs to the field of switch devices. The casing for the switchgear comprises an insulator and a conducting rod, wherein an electric element is embedded in the insulator, an insert electrically connected with the electric element is embedded in the insulator, the insulator comprises an extending part which penetrates through a switchgear box body to extend into the switchgear, and a positioning block which is used for being inserted into a positioning hole on the switchgear box body and is matched with the positioning hole in a positioning mode is arranged on the insulator. The switch equipment comprises a box body and a sleeve arranged on the box body, wherein the box body is provided with a perforation through which an extending part of an insulator of the sleeve penetrates to extend into the box body, the sleeve is the sleeve for the switch equipment, and the box body is provided with a positioning hole for inserting a positioning block of the sleeve and being matched with the positioning block in a positioning way. The utility model utilizes the matching of the positioning block on the sleeve for the switch equipment and the positioning hole on the box body, thereby being beneficial to improving the assembly efficiency.
Description
Technical Field
The utility model belongs to the technical field of switching equipment, and particularly relates to a sleeve for switching equipment and switching equipment.
Background
The bushing serves in the switchgear to insulate and to connect the main circuit conductor inside the switchgear to the cable. Partial discharge often occurs at the bushing, and the partial discharge seriously damages insulation. The sleeve is formed by epoxy pouring, air bubbles, air gaps and the like are mixed in the epoxy during pouring, electric charge accumulation is formed during high-voltage passing, electric field concentration is caused, electric charge is led into the ground through the shielding net in the prior art, and electric field concentration is reduced.
For example, the patent of CN211719500U discloses a bushing for reducing partial discharge of ZW20 switch, the bushing passes through the box and the current transformer, the bushing comprises a bushing jacket, an insulating member is arranged in the bushing jacket, a sealing ring is arranged in the insulating member, a shielding net is arranged in the insulating member, the shielding net is connected with a grounding wire, a secondary outlet is arranged on the insulating member, and the grounding wire passes out from the secondary outlet.
The shielding net of the technical scheme is grounded through the lead, so that the problem of electric field concentration in the shielding net is avoided. The grounding wire is generally connected with the box body so as to ground the shielding net, and in order to improve the connection reliability of the grounding wire and the box body, manufacturers also open holes in the box body so as to lead the grounding wire into the box body and connect the grounding wire with the box body. In addition, the sensor for detecting the voltage of the incoming and outgoing lines, which is arranged in the sleeve, is also connected with a wire, and the wire is connected into the box body.
In addition, in the prior art, the problem that the sleeve cannot be accurately positioned exists in the process of mounting, because the sleeve is a revolving body, the revolving body can rotate during assembly, the assembly angles of the terminals of the batch products are inconsistent, and an operator is required to adjust the sleeve according to experience, so that the assembly efficiency is affected. In addition, in order to facilitate wiring, the secondary outlet in the technical scheme needs to be positioned in the circumferential direction, and the problem that positioning is difficult is also caused.
Disclosure of Invention
The utility model aims to provide a sleeve for switch equipment, which solves the technical problem that the sleeve cannot be accurately positioned in the prior art.
Another object of the present utility model is to provide a switchgear to solve the above technical problems.
In order to achieve the above object, the technical scheme of the bushing for switchgear provided by the utility model is as follows:
the casing pipe for the switch equipment comprises an insulator and a conducting rod, wherein an electric element is embedded in the insulator, an insert electrically connected with the electric element is embedded in the insulator, the insulator comprises an extending part which penetrates through a switch equipment box body to extend into the switch equipment, and a positioning block which is used for being inserted into a positioning hole on the switch equipment box body and is matched with the positioning hole in a positioning mode is arranged on the insulator.
The beneficial effects are that: the technical scheme is a further improvement on the prior art. When the switch device is installed, the positioning block can be inserted into the positioning hole on the corresponding switch device box body to perform angle positioning on the sleeve for the switch device, and compared with the prior art, the angle position of the sleeve for the switch device is not required to be manually adjusted by an operator, so that the installation efficiency is effectively improved. Meanwhile, the inserts on the positioning blocks can be positioned, so that wiring operation is facilitated.
As a further improvement, the insert is arranged in the positioning block.
The beneficial effects are that: when the sleeve pipe for switchgear is positioned by utilizing the matching of the positioning block and the positioning hole, the insert is also sent into the box body of the switchgear, and the insert can be used for connecting wires.
As a further improvement, the insulator comprises a flange which is arranged outside the switchgear and is fit with the outer surface of the switchgear box body, the edge of the flange is partially protruded to form a positioning protrusion, and the positioning block is positioned at the positioning protrusion.
The beneficial effects are that: because the positioning block cannot be directly seen by an operator when the sleeve for the switch equipment is installed, the positioning block is difficult to align with the positioning hole on the box body by the operator. According to the technical scheme, an operator can determine the position of the positioning block according to the positioning protrusion, so that the installation efficiency of the sleeve for the switch equipment is further improved.
As a further improvement, the flange is provided with a seal ring mounting groove on a side surface for facing the outer surface of the case.
The beneficial effects are that: the sealing ring can be arranged in the sealing ring mounting groove so as to facilitate sealing between the sleeve for the switch equipment and the switch equipment, and the functions of dust prevention, water prevention and air leakage prevention are achieved.
As a further improvement, the seal ring mounting groove covers to the positioning protrusion, and the positioning block is located inside the seal ring mounting groove.
The beneficial effects are that: because the positioning block is in positioning fit with the positioning hole, the positioning block is arranged in the sealing ring mounting groove, and air leakage at the positioning hole can be effectively prevented.
As a further improvement, a ring groove for inserting the electric element in the switchgear is provided between the end portion and the projecting portion of the conductive rod, and an elastic sealing sleeve for filling a gap between the electric element and an inner wall of the ring groove is provided in the ring groove.
The beneficial effects are that: the elastic sealing sleeve can fill the gap between the inner wall of the mounting cavity and the electric element, eliminates charge accumulation caused by the air gap, and further avoids partial discharge and insulation damage and equipment damage caused by the partial discharge.
As a further improvement, the electrical element is a shielding mesh.
The beneficial effects are that: the shielding net can avoid electric field concentration and effectively prevent partial discharge at the sleeve for the switch equipment.
In order to achieve the above purpose, the technical scheme of the switch device provided by the utility model is as follows:
the switch equipment comprises a box body and a sleeve pipe arranged on the box body, wherein an extending part of an insulator for the sleeve pipe is arranged on the box body and penetrates through a perforation formed in the box body so as to extend into the box body, the sleeve pipe comprises the insulator and a conducting rod, an electric element is embedded in the insulator, an insert electrically connected with the electric element is embedded in the insulator, the insulator comprises an extending part which penetrates through the box body of the switch equipment so as to extend into the switch equipment, a positioning block which is used for being inserted into a positioning hole on the box body of the switch equipment and is matched with the positioning hole in a positioning mode is arranged on the insulator, and a positioning hole which is used for the insertion of the sleeve pipe and is matched with the positioning hole in a positioning mode is formed in the box body.
The beneficial effects are that: the technical scheme is a further improvement on the prior art. When the switch device is installed, the positioning block can be inserted into the positioning hole on the box body to perform angle positioning on the sleeve for the switch device, so that the sleeve for the switch device can keep the same angle after being installed on the box body. Meanwhile, the inserts on the positioning blocks can be positioned, so that wiring operation is facilitated.
As a further improvement, the insert is arranged in the positioning block.
The beneficial effects are that: when the sleeve pipe for switchgear is positioned by utilizing the matching of the positioning block and the positioning hole, the insert is also sent into the box body of the switchgear, and the insert can be used for connecting wires.
As a further improvement, the insulator comprises a flange which is arranged outside the switchgear and is fit with the outer surface of the switchgear box body, the edge of the flange is partially protruded to form a positioning protrusion, and the positioning block is positioned at the positioning protrusion.
The beneficial effects are that: because the positioning block cannot be directly seen by an operator when the sleeve for the switch equipment is installed, the positioning block is difficult to align with the positioning hole on the box body by the operator. According to the technical scheme, an operator can determine the position of the positioning block according to the positioning protrusion, so that the installation efficiency of the sleeve for the switch equipment is further improved.
As a further improvement, the flange is provided with a seal ring mounting groove on a side surface for facing the outer surface of the case.
The beneficial effects are that: the sealing ring can be arranged in the sealing ring mounting groove so as to facilitate sealing between the sleeve for the switch equipment and the switch equipment, and the functions of dust prevention, water prevention and air leakage prevention are achieved.
As a further improvement, the seal ring mounting groove covers to the positioning protrusion, and the positioning block is located inside the seal ring mounting groove.
The beneficial effects are that: because the positioning block is in positioning fit with the positioning hole, the positioning block is arranged in the sealing ring mounting groove, and air leakage at the positioning hole can be effectively prevented.
As a further improvement, a ring groove for inserting the electric element in the switchgear is provided between the end portion and the projecting portion of the conductive rod, and an elastic sealing sleeve for filling a gap between the electric element and an inner wall of the ring groove is provided in the ring groove.
The beneficial effects are that: the elastic sealing sleeve can fill the gap between the inner wall of the mounting cavity and the electric element, eliminates charge accumulation caused by the air gap, and further avoids partial discharge and insulation damage and equipment damage caused by the partial discharge.
As a further improvement, the electrical element is a shielding mesh.
The beneficial effects are that: the shielding net can avoid electric field concentration and effectively prevent partial discharge at the sleeve for the switch equipment.
As a further improvement, a turning edge turned towards the inside of the box body is arranged at the hole opening of the perforation, and a sealing ring is arranged between the turning edge and the extending part.
The beneficial effects are that: the sealing ring can play the effect of preventing perforation department gas leakage.
As a further improvement, a fixing stud for fixing the sleeve is arranged on the outer side surface of the box body.
The beneficial effects are that: after the sleeve is assembled, the nut on the fixing stud is screwed down, so that the sleeve can be fixed on the box body, and the operation is convenient. In addition, the mounting mode does not need to be provided with holes in the box body, so that the sealing performance of the box body is effectively prevented from being poor due to the holes.
Drawings
Fig. 1 is a schematic structural view of a sectional view of embodiment 1 of a switchgear in the present utility model;
FIG. 2 is a schematic illustration of the relative positions of the perforations, locating holes and flange fixing studs of embodiment 1 of the switchgear of the present utility model;
fig. 3 is a schematic structural view of a bushing for switchgear of embodiment 1 of the switchgear in the present utility model;
fig. 4 is a schematic structural view of a flange of embodiment 1 of the switchgear in the present utility model.
Reference numerals illustrate:
1. a case; 2. sealing the polar post; 21. a connection end; 22. a conductive connection; 3. an insulator; 4. a conductive rod; 5. a mounting cavity; 6. an elastic sealing sleeve; 7. a flange; 8. fixing a stud; 9. a positioning block; 10. an insert; 11. positioning the bulge; 12. a shielding net; 13. perforating; 14. positioning holes; 15. a mounting groove; 16. a first seal ring; 17. a second seal ring; 18. and (3) a flange.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
The present utility model is described in further detail below with reference to examples.
Specific embodiment 1 of the switching device provided by the utility model:
in the embodiment, the box body is provided with the positioning hole, the sleeve for the switch equipment is provided with the positioning block which is in plug-in fit with the positioning hole, and the lead connected with the electric element in the sleeve is led out from the positioning block, so that the positioning block can play a role in positioning and fool-proofing, can serve as a conductive leading-out channel, and is convenient to lead the lead into the box body.
Referring to fig. 1, the switchgear includes a case 1 and a sleeve mounted on the case 1, and a solid-sealed pole 2 is provided in the case 1.
The sleeve comprises an insulator 3 and a conducting rod 4 arranged in the insulator 3, wherein one end of the insulator 3 is an extending part which is inserted into the box body 1 during installation, an installation cavity 5 is formed in the end wall of the extending part of the insulator 3, one end of the conducting rod 4 is arranged in the installation cavity 5 and is flush with one end of the insulator 3 which is inserted into the box body 1, and an annular groove for inserting the solid sealing pole 2 in the switch equipment is arranged between the installation cavity 5 and the conducting rod 4.
Referring to fig. 2, an elastic sealing sleeve 6 is fixedly arranged on the inner wall of the installation cavity 5, and the inner wall of the installation cavity 5 and the inner wall of the elastic sealing sleeve 6 are conical surfaces. In this embodiment, the elastic sealing sleeve 6 is a silicone rubber sleeve, which has strong elastic deformation capability and strong sealing effect, and in other embodiments, elastic materials such as rubber and silica gel can be used. The solid sealing pole 2 is provided with a connecting end 21 which can be inserted into the annular groove, a conductive connecting piece 22 is arranged in the connecting end 21, and a connecting hole which can be in plug-in fit with the conductive rod 4 is formed in the center of the conductive connecting piece 22. After the connection end 21 of the solid-sealed pole 2 is inserted into the ring groove, the conductive rod 4 can be simultaneously inserted into the connection hole of the conductive connecting piece 22 to form electrical connection.
Meanwhile, the connecting end 21 of the solid-sealed polar pole 2 can extrude the elastic sealing sleeve 6, so that the elastic sealing sleeve 6 fully fills a gap between the inner wall of the mounting cavity 5 and the connecting end 21 of the solid-sealed polar pole 2, an air gap is avoided, local charge accumulation is eliminated, and dielectric breakdown caused by partial discharge is prevented.
The insulator 3 is integrally formed with a flange 7, the flange 7 is sleeved with a flange 18 with a mounting hole, the flange 18 is structurally shown in fig. 4, a fixing stud 8 is fixedly arranged on the outer side wall of the box body 1, the fixing stud 8 can be inserted into the corresponding mounting hole, and a fixing nut on the flange fixing stud is screwed, so that the insulator 3 can be fixedly mounted on the box body 1. One side of the flange 7 is a matching end face abutting against the outer side wall of the box body 1, a positioning block 9 with a kidney-shaped structure is formed on the matching end face, and an insert 10 is integrally cast in the positioning block 9. In this embodiment, the insert 10 is a cap-shaped body made of copper, and one end of the opening of the insert 10 is flush with the surface of the positioning block 9. The edge of the flange 7 is convex to form a positioning protrusion 11, and the positioning block 9 is positioned at the positioning protrusion 11. An electrical element is integrally cast in the insulator 3, in this embodiment, the electrical element is a shielding net 12 for preventing local electric field concentration, and the shielding net 12 is electrically connected with the insert 10 through a wire.
A through hole 13 for inserting the insertion part of the sleeve and a positioning hole 14 for matching with the positioning block 9 are formed on one side wall of the case 1, and the positioning hole 14 is located above the through hole 13, see fig. 3.
The fitting end face of the flange 7 is provided with a sealing ring mounting groove 15 which extends along the edge contour near the edge, the positioning block 9 is positioned on the inner side of the sealing ring mounting groove 15, a first sealing ring 16 is arranged in the sealing ring mounting groove 15, and the root of the flange 7 is provided with a second sealing ring 17 sleeved on the insulator 3. After the insulator 3 is mounted on the case 1, the second seal ring 17 abuts against the opening of the through hole 13, and the first seal ring 16 abuts against the outer side wall of the case 1. The opening of the perforation 13 is bent towards the inner side of the box body to form an arc-shaped turning edge, the second sealing ring 17 is abutted against the turning edge, the sealing effect is effectively improved, and the second sealing ring 17 is not easy to damage.
Specific embodiment 2 of the switching device provided by the utility model:
the present embodiment provides another form of electrical element, which differs from embodiment 1 mainly in that in the present embodiment, the electrical element is a sensor for measuring the voltage on the conductive rod, in particular a ring capacitor. In this embodiment, the lead is led out through the insert, and the lead is directly led into the box body by using the positioning hole, so that a separate hole is not required to be formed in the box body.
In other embodiments, the sensor and the shielding net may be disposed in the insulator at the same time, and two inserts are disposed in the positioning block and electrically connected to the sensor and the shielding net, respectively.
Specific embodiment 3 of the switching device provided by the utility model:
the present embodiment provides another form of insert, which is different from embodiment 1 mainly in that in this embodiment, the electrical element is connected with a connection wire, one end of the connection wire is buried in the insulator, and the other end of the connection wire is led out from the end of the positioning block, so that the free end of the connection wire is directly located in the case. The connecting wires in this embodiment constitute the insert.
Specific embodiment 4 of the switching device provided by the utility model:
the present embodiment provides another installation form of the insert, which is different from embodiment 1 only in that the insert is not disposed on the positioning block, and the casing is separately provided with an opening for the wire connected to the insert to be inserted into the casing.
Specific embodiment 5 of the switching device provided by the utility model:
this embodiment provides another mounting form of the flange, which differs from embodiment 1 only in that the flange is circular in configuration and has no local protrusions.
Specific embodiment 6 of the switching device provided by the utility model:
the present embodiment provides another structural form of the flange, which differs from embodiment 1 only in that the side surface of the flange in the present embodiment is not provided with a seal ring mounting groove.
Embodiment 7 of the switching device provided by the utility model:
the present embodiment provides another structural form of the flange, which is different from embodiment 1 only in that the seal ring mounting groove in this embodiment has a circular structure, and the positioning block is located outside the seal ring mounting groove.
Specific embodiment 8 of the switching device provided by the utility model:
the present embodiment provides another structural form of the perforated orifice, which is different from embodiment 1 only in that no turning edge is provided at the perforated orifice in the present embodiment, and the second seal ring is directly contacted with the perforated orifice.
Specific embodiment 9 of the switching device provided by the utility model:
the present embodiment provides another connection form of the sleeve and the case, which is different from embodiment 1 only in that the flange and the case are directly perforated in the present embodiment, and the flange and the case are connected by bolts.
The utility model provides a concrete embodiment of a bushing for a switch device, which comprises the following steps:
the sleeve for a switchgear is any one of embodiments 1 to 9 of the switchgear of the present utility model, and will not be described herein.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The casing for the switch equipment comprises an insulator (3) and a conducting rod (4), wherein an electric element is embedded in the insulator (3), an insert (10) electrically connected with the electric element is embedded in the insulator (3), the insulator (3) comprises an extending part which penetrates through a switch equipment box body (1) to extend into the switch equipment, and the casing is characterized in that a positioning block (9) which is used for being inserted into a positioning hole (14) in the switch equipment box body (1) and matched with the positioning hole (14) in a positioning mode is arranged on the insulator (3).
2. A bushing for a switchgear according to claim 1, characterized in that the insert (10) is arranged in a positioning block (9).
3. A bushing for a switchgear according to claim 1 or 2, characterized in that the insulator (3) comprises a flange (7) for being arranged outside the switchgear and being in abutment with the outer surface of the switchgear housing (1), the edge of the flange (7) being locally convex forming a positioning protrusion (11), the positioning block (9) being located at the positioning protrusion (11).
4. A bushing for a switchgear according to claim 3, characterized in that the flange (7) is provided with a sealing ring mounting groove (15) on the side for facing the outer surface of the casing (1).
5. A bushing for a switchgear according to claim 4, characterized in that the sealing ring mounting groove (15) is covered to the positioning projection (11), and the positioning block (9) is located inside the sealing ring mounting groove (15).
6. A bushing for a switchgear according to claim 1 or 2, characterized in that a ring groove for inserting an electrical component in the switchgear is provided between the end of the conductive rod (4) and the projecting portion, and that an elastic sealing sleeve (6) for filling the gap between the electrical component and the inner wall of the ring groove is provided in the ring groove.
7. A bushing for a switchgear according to claim 1 or 2, characterized in that the electrical element is a shielding net (12).
8. The switchgear comprises a box body (1) and a sleeve arranged on the box body (1), wherein an extending part of an insulator (3) for the sleeve is arranged on the box body (1) and penetrates through a perforation (13) for extending into the box body (1), and the switchgear is characterized in that the sleeve is a sleeve for the switchgear according to any one of claims 1-7, and a positioning hole (14) for inserting a positioning block (9) of the sleeve and being matched with the positioning block (9) in a positioning way is arranged on the box body (1).
9. Switching device according to claim 8, characterized in that the opening of the perforation (13) is provided with a turned-over edge turned over inwards towards the casing (1), between which turned-over edge and the extension a sealing ring is provided.
10. A switching device according to claim 8, characterized in that the outer side of the housing (1) is provided with a fixing stud (8) for fixing the bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321843790.0U CN220382573U (en) | 2023-07-13 | 2023-07-13 | Sleeve for switchgear and switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321843790.0U CN220382573U (en) | 2023-07-13 | 2023-07-13 | Sleeve for switchgear and switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220382573U true CN220382573U (en) | 2024-01-23 |
Family
ID=89569225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321843790.0U Active CN220382573U (en) | 2023-07-13 | 2023-07-13 | Sleeve for switchgear and switchgear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220382573U (en) |
-
2023
- 2023-07-13 CN CN202321843790.0U patent/CN220382573U/en active Active
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