Shell connection structure of power supply or distribution equipment

Abstract

The invention provides a shell connecting structure of power supply or power distribution equipment, and belongs to the technical field of power supply or power distribution equipment. The shell connecting structure of the power supply or power distribution equipment comprises an insulating part and a first shell and a second shell which are arranged on the two sides of the insulating part, the first shell is provided with a first flange, the second shell is provided with a second flange, the first flange is connected with a first connecting conductor, and the second flange is connected with a second connecting conductor. And an overvoltage protection device is arranged between the first connecting conductor and the second connecting conductor, is in an insulating state when the voltage difference between the two ends is lower than a set value, and is in a conducting state when the voltage difference is higher than the set value. The overvoltage protection device is arranged between the first shell and the second shell, so that when the voltage difference between the first shell and the second shell is large, the overvoltage protection device can be conducted to release voltage, and an insulating part is prevented from being broken down and damaged.

Description

Technical Field

[0001] This invention belongs to the field of power supply or distribution equipment technology, and in particular relates to a housing connection structure for power supply or distribution equipment. Background Technology

[0002] GIS refers to gas-insulated metal-enclosed switchgear. GIS is generally connected to transformers through GIS bushings-overhead lines-transformer bushings. However, this method is greatly affected by the surrounding environment and requires a large space. Therefore, more and more dedicated connection devices are used to directly connect GIS and transformers.

[0003] For example, Chinese invention patent application CN106129824A, published on November 16, 2016, discloses a direct connection device for a three-phase common-enclosure GIS busbar and a transformer. This direct connection device includes a transformer base plate, disc insulators, and a direct connection housing located between the transformer base plate and the disc insulators. An oil-gas bushing is installed on the transformer base plate, located within the direct connection housing. A busbar conductor is installed between the oil-gas bushing and the disc insulators. The side of the disc insulator furthest from the housing is connected to the GIS housing.

[0004] Disc insulators serve as isolation and insulation between the direct-connection device and the GIS (Gas Insulation System). Sealing structures are installed between the disc insulator and the flanges of both the direct-connection housing and the GIS housing to prevent leakage of internal insulating gas. Furthermore, the bolts connecting the direct-connection housing, disc insulator, and GIS housing, and penetrating all three, are also insulated to prevent conductive contact between the direct-connection housing and the GIS housing. During use, a significant instantaneous voltage difference may occur between the GIS housing and the direct-connection housing, making the disc insulator susceptible to breakdown and damage. The same issues exist when using other insulating components, such as basin insulators, to connect the housings of different power supply or distribution equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a housing connection structure for power supply or distribution equipment, so as to solve the technical problem that when there is a large voltage difference between the housings of two different power supply or distribution equipment, the insulation between them is easily broken down and damaged.

[0006] To achieve the above objectives, the technical solution for the housing connection structure of power supply or distribution equipment provided by the present invention is as follows:

[0007] A housing connection structure for power supply or distribution equipment includes an insulating component and a first housing and a second housing disposed on both sides of the insulating component. The first housing has a first flange, and the second housing has a second flange. A first connecting conductor is connected to the first flange, and a second connecting conductor is connected to the second flange. An overvoltage protection device is provided between the first connecting conductor and the second connecting conductor to be in an insulating state when the voltage difference between the two ends is lower than a set value and to be in a conducting state when it is higher than the set value.

[0008] As a further improvement, the first flange is provided with a first threaded connector for connecting to and pressing the first connecting conductor, one of the first threaded connector and the first flange being provided with an external thread and the other with an internal thread; the second flange is provided with a second threaded connector for connecting to and pressing the second connecting conductor, one of the second threaded connector and the second flange being provided with an external thread and the other with an internal thread.

[0009] As a further improvement, blind holes with internal threads are formed on the side walls of the first flange and the second flange away from the insulating component. The first threaded connector is a first mounting bolt that connects to the blind hole on the first flange, and the second threaded connector is a second mounting bolt that connects to the blind hole on the second flange. A first mounting hole for the first mounting bolt to pass through is formed on the first connecting conductor, and a second mounting hole for the second mounting bolt to pass through is formed on the second connecting conductor.

[0010] As a further improvement, the first flange, the second flange, and the insulating component are respectively provided with circumferentially arranged connection holes, and connection bolt assemblies are provided in the connection holes. Blind holes are located between two adjacent connection holes.

[0011] As a further improvement, one of the first connecting conductor and the second connecting conductor is a support connecting conductor for supporting the overvoltage protection device, and the other is an adjusting connecting conductor for adapting to the height of the overvoltage protection device after bending.

[0012] As a further improvement, the supporting connecting conductor is a flat plate structure.

[0013] As a further improvement, the overvoltage protection device is provided with an adjusting screw at one end connected to the adjusting connecting conductor. The adjusting connecting conductor has an adjusting opening for the adjusting screw to pass through. At least two adjusting nuts are threaded onto the adjusting screw, and there are adjusting nuts on both sides of the adjusting connecting conductor, so as to clamp the adjusting connecting conductor with the adjusting nuts.

[0014] As a further improvement, the supporting connecting conductor and the adjusting connecting conductor are made of the same material, and the thickness of the supporting connecting conductor is 1.5-3 times that of the adjusting connecting conductor.

[0015] As a further improvement, the overvoltage protection device and the first and second connecting conductors connected thereto constitute an overvoltage protection assembly, and at least two sets of the overvoltage protection assembly are provided.

[0016] As a further improvement, the overvoltage protection device is a surge arrester.

[0017] The beneficial effects are as follows: The housing connection structure of the power supply or distribution equipment provided by this invention is an improvement over the prior art. This housing connection structure incorporates an overvoltage protection device between the first and second housings. When a large instantaneous voltage difference occurs between the first and second housings and this voltage difference exceeds the set value for the overvoltage protection device to activate, the overvoltage protection device will activate, thereby rapidly releasing the pressure and preventing the insulation components from being broken down and damaged, thus protecting the insulation components. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of one embodiment of the housing connection structure of the power supply or distribution equipment in this invention;

[0019] Figure 2 This is a schematic diagram of the structure of the second flange in one embodiment of the housing connection structure of the power supply or distribution equipment in this invention;

[0020] Figure 3 for Figure 2 A sectional view along the middle edge BB;

[0021] Figure 4 for Figure 2 Sectional view along the middle AA;

[0022] Figure 5 for Figure 1 A magnified view of a section at point C;

[0023] Figure 6 This is a schematic diagram of the structure after removing the bus conductor in one embodiment of the housing connection structure of the power supply or distribution equipment in this invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Transformer base plate; 2. Basin insulator; 3. Transition flange; 4. Lower housing; 5. Bellows; 51. Main body; 52. Upper flange body; 53. Lower flange body; 54. Tie rod; 55. Locking nut; 56. Fastening nut; 57. Spherical washer; 58. Conical washer; 6. Upper housing; 7. First flange; 8. Second flange; 9. Connecting hole; 10. Connecting bolt; 11. Connecting nut; 12. Flat washer; 13. Spring washer ; 14. Insulating material; 15. First connecting conductor; 16. Second connecting conductor; 17. Surge arrester; 18. Blind hole; 19. First mounting bolt; 20. Transformer bushing; 21. Electrical connector; 22. Upper conductor; 23. Middle conductor; 24. Lower conductor; 25. Shielding conductor; 26. Hand hole; 27. Cover plate; 28. GIS housing; 29. ​​Shielding cover; 30. Second mounting bolt; 31. Adjusting screw; 32. Adjusting nut. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the embodiments.

[0027] To address the problems existing in the prior art, the basic concept of this invention is to install an overvoltage protection device between the first housing and the second housing, so that when the voltage difference between the first housing and the second housing is large, the overvoltage protection device can conduct and release pressure, preventing the insulating components from being broken down and damaged.

[0028] Specific embodiments of the housing connection structure of the power supply or distribution equipment provided by the present invention:

[0029] See appendix Figure 1 The housing connection structure of the power supply or distribution equipment includes an insulating component and a first housing and a second housing disposed on both sides of the insulating component. The second housing is the GIS housing 28, and the first housing is the housing of the direct connection device between the GIS and the transformer, i.e., the direct connection housing. The direct connection device between the GIS and the transformer also includes a transformer base plate 1, and the direct connection housing is disposed between the transformer base plate 1 and the insulating component.

[0030] In this embodiment, the insulating component is a basin-type insulator 2. In other embodiments, the insulating component may also be a disc-type insulator.

[0031] The direct-connected housing includes a transition flange 3, a lower housing 4, a bellows 5, and an upper housing 6 arranged sequentially from the transformer base plate 1 to the insulating components.

[0032] See appendix Figure 2 and attached Figure 3 Both the GIS housing 28 and the upper housing 6 have flanges for connecting to the insulating components, wherein the flange of the upper housing 6 is the first flange 7 and the flange of the GIS housing 28 is the second flange 8.

[0033] The first flange 7 and the second flange 8 are located on opposite sides of the basin insulator 2, specifically, the first flange 7 is located on the lower side of the basin insulator 2, and the second flange 8 is located on the upper side of the basin insulator 2. Connecting holes 9 are circumferentially arranged at corresponding positions on the first flange 7, the second flange 8, and the basin insulator 2. Connecting bolt assemblies are installed within the connecting holes 9 to connect the first flange 7, the second flange 8, and the basin insulator 2. The connecting bolt assembly includes a connecting screw 10 passing through the connecting hole 9, connecting nuts 11 threaded to both ends of the connecting screw 10, and flat washers 12 and spring washers 13 fitted onto the connecting screw 10. Insulating material 14 is provided within the connecting hole 9 of the second flange 8, between the second flange 8 and the corresponding flat washer 12, and between the second flange 8 and the basin insulator 2 to prevent the connecting screw 10 from establishing a connection between the GIS housing 28 and the upper housing 6. A sealing structure is also provided between the first flange 7 and the pot insulator 2, and between the second flange 8 and the pot insulator 2, to prevent leakage of insulating gas in the GIS and direct connection device.

[0034] See appendix Figure 2 and attached Figure 4 Two first connecting conductors 15 are connected to the first flange 7, and two second connecting conductors 16 are connected to the second flange 8. An overvoltage protection device, specifically a surge arrester 17, is installed between each of the corresponding first connecting conductors 15 and second connecting conductors 16. This surge arrester has the characteristic of being in an insulating state when the voltage difference between its two ends is below a set value and in a conducting state when it is above the set value. The size of the surge arrester 17 varies depending on the set conduction voltage. In other embodiments, the overvoltage protection device can also be an overvoltage protector. After the overvoltage protection device is installed, if a large instantaneous voltage difference occurs between the GIS housing 28 and the directly connected housing, and this voltage difference exceeds the set value for the overvoltage protection device to conduct, the overvoltage protection device will conduct, thereby quickly releasing the pressure and preventing the insulation components from being broken down and damaged. The overvoltage protection device and the connected first connecting conductors 15 and second connecting conductors 16 constitute an overvoltage protection assembly. Two sets of the overvoltage protection assembly are provided, mainly to ensure that if one set fails, the other set can continue to operate. In other embodiments, the number of overvoltage protection assemblies can also be one set, or three or four sets.

[0035] Both ends of the surge arrester 17 are provided with screws. Both ends of the first connecting conductor 15 and the second connecting conductor 16 in the length direction are provided with openings. One of the openings is used to fit onto the screw of the surge arrester 17. Then, the surge arrester 17 can be fixedly connected to the first connecting conductor 15 and the second connecting conductor 16 by using a nut.

[0036] The first flange 7 is provided with a first threaded connector for connecting to and pressing the first connecting conductor 15. One of the first threaded connector and the first flange 7 has an external thread, and the other has an internal thread. The second flange 8 is provided with a second threaded connector for connecting to and pressing the second connecting conductor 16. One of the second threaded connector and the second flange 8 has an external thread, and the other has an internal thread. Specifically, blind holes 18 are provided on the side walls of both the first flange 7 and the second flange 8 away from the basin insulator 2. Internal threads are formed within the blind holes 18. The first threaded connector is a first mounting bolt 19 that connects to the blind hole 18 on the first flange 7, and the second threaded connector is a second mounting bolt 30 that connects to the blind hole 18 on the second flange 8. The first connecting conductor 15 has a first mounting hole through which the first mounting bolt 19 passes, and the second connecting conductor 16 has a second mounting hole through which the second mounting bolt 30 passes.

[0037] Blind holes 18 on the first flange 7 and the second flange 8 are located between two adjacent connecting holes 9. During the machining of the connecting holes 9, the blind holes 18 can be machined simultaneously to improve machining efficiency and reduce costs. Using the blind holes 18 on the first flange 7 and the second flange 8 to connect the first mounting bolt 19 and the second mounting bolt 30 to install the first connecting conductor 15 and the second connecting conductor 16 facilitates the assembly and disassembly of the first connecting conductor 15 and the second connecting conductor 16, making it easier to replace the surge arrester 17 after damage. It also prevents damage to the insulation and sealing structure between the first flange 7 and the basin insulator 2, and between the second flange 8 and the basin insulator 2, eliminating the need for redesigning and testing the insulation and sealing structure. This effectively reduces costs and facilitates the modification of existing power supply or distribution equipment housings.

[0038] One of the first connecting conductor 15 and the second connecting conductor 16 is a supporting connecting conductor for supporting the overvoltage protection device, and the other is an adjusting connecting conductor for adapting to the height of the overvoltage protection device after bending. Specifically, the first connecting conductor 15 is a supporting connecting conductor, and the second connecting conductor 16 is an adjusting connecting conductor.

[0039] The supporting conductor needs to provide support for the surge arrester 17, so it needs to have sufficient strength; while the adjusting conductor needs to be adapted to different models of surge arresters 17, so it needs to have less strength to facilitate bending by operators. When the supporting conductor and the adjusting conductor are made of the same material, in order to ensure the above two points and save materials, the thickness of the supporting conductor is 1.5-3 times the thickness of the adjusting conductor.

[0040] In this embodiment, both the first connecting conductor 15 and the second connecting conductor 16 are made of aluminum plate. The thickness of the first connecting conductor 15 is preferably 5 mm, and the thickness of the second connecting conductor 16 is preferably in the range of 2-3 mm. Because the first connecting conductor 15 is thicker, it is more difficult to bend and process. In this embodiment, the first connecting conductor 15 has a flat structure to reduce processing and lower costs. In other embodiments, the first connecting conductor 15 can also be bent into the required shape as needed. The second connecting conductor 16 can be bent into a Z-shape or other shapes as needed. In other embodiments, the first connecting conductor 15 can be made of steel plate, and the second connecting conductor 16 can be made of easily bendable copper plate. In this embodiment, the materials of the first connecting conductor 15 and the second connecting conductor 16 are different, and their specific thicknesses are set according to actual needs.

[0041] The screw at one end of the surge arrester 17 that connects to the adjusting connecting conductor is an adjusting screw 31. Two adjusting nuts 32 are installed on the adjusting screw 31. An opening on the adjusting connecting conductor allows the adjusting screw 31 to pass through. The two adjusting nuts 32 clamp and secure the adjusting connecting conductor. During assembly, if the adjusting connecting conductor cannot be accurately assembled with the surge arrester 17 even after bending, the positions of the two adjusting nuts 32 can be changed, thereby altering the connection position between the adjusting connecting conductor and the adjusting screw 31, ensuring accurate assembly of the adjusting connecting conductor and the surge arrester 17.

[0042] During installation, the first connecting conductor 15 can be fixed to the first flange 7 first, then the surge arrester 17 can be installed on the first connecting conductor 15, and finally the second connecting conductor 16 can be connected to the surge arrester 17 and the second flange 8. After the surge arrester 17 is connected to the first connecting conductor 15, the first connecting conductor 15 can support the surge arrester 17, making it convenient for operators to adjust the shape of the second connecting conductor 16 according to the distance from the upper end of the surge arrester 17 to the upper end of the second flange 8, and to install the second connecting conductor 16 from above, thus improving the ease of operation. In other embodiments, the second connecting conductor 16 can also be a supporting connecting conductor, and the first connecting conductor 15 can be an adjusting connecting conductor, in which case the supporting connecting conductor is located above the adjusting connecting conductor.

[0043] Due to the transformer's heavy weight, fine-tuning is difficult after hoisting, inevitably leading to assembly errors with the direct-connection device. The bellows 5, with its excellent deformability, can be used to eliminate these assembly errors. See Appendix. Figure 1The bellows 5 includes a main pipe body 51, an upper flange body 52 and a lower flange body 53 located at the upper and lower ends of the main pipe body 51, and a tie rod 54. The upper flange body 52 has a threaded hole, and the upper end of the tie rod 54 is threaded into the threaded hole. To prevent the tie rod 54 from loosening, an anti-loosening nut 55 is also threaded onto the upper end of the tie rod 54. The lower flange body 53 has a through hole, and the lower end of the tie rod 54 passes through the through hole and has a clearance fit with the through hole. Two fastening nuts 56 are also threaded onto the lower end of the tie rod 54. The fastening nuts 56 are located on the upper and lower sides of the lower flange body 53, respectively, and a washer assembly is provided between the fastening nuts 56 and the lower flange body 53.

[0044] When there is an assembly error in the height direction of the transformer, the axial length of the bellows 5 can be adjusted to eliminate the error. When there is an assembly error in the horizontal direction of the transformer, the lower flange 53 can be moved horizontally relative to the upper flange 52 to eliminate the error. During this process, the gap between the tie rod 54 and the through hole allows the lower flange 53 to move horizontally relative to the upper flange 52 to a certain extent. When there is a misalignment assembly error in the transformer, the lower flange 53 can be misaligned relative to the upper flange 52 by a certain angle to eliminate the error.

[0045] See appendix Figure 5 The gasket assembly includes a spherical washer 57 and a conical washer 58. The spherical washer 57 has an outer spherical surface, and the conical washer 58 has an inner conical surface. The outer spherical surface of the spherical washer 57 mates with the inner conical surface of the conical washer 58. When the spherical washer 57 is deflected relative to the conical washer 58 by a certain angle, it can still maintain stable contact. Therefore, even when the lower flange body 53 is deflected relative to the upper flange body 52 by a certain angle, it can still ensure the good fixing effect of the tie rod 54.

[0046] A transformer bushing 20 is provided on the transformer base plate 1. The transformer bushing 20 is located inside the direct-connection shell. Both the transformer bushing 20 and the basin insulator 2 are provided with electrical connectors 21. A bus conductor is provided between the two electrical connectors 21. The two ends of the bus conductor are respectively plugged into the corresponding electrical connectors 21.

[0047] The positions of the busbar conductors correspond to the positions of the upper housing 6. The busbar conductors include an upper conductor 22, an intermediate conductor 23, and a lower conductor 24 arranged sequentially from top to bottom. An operating groove is provided on the outer peripheral wall of the intermediate conductor 23. Bolts passing through the intermediate conductor 23 and connecting it to the upper conductor 22 and the lower conductor 24 are provided on both the upper and lower side walls of the operating groove. The operating groove allows operators to easily install and remove the intermediate conductor 23. A handhole 26 is provided on the upper housing 6, and a cover plate 27 for sealing the handhole 26 is installed at the handhole 26 by bolts. See Appendix. Figure 6When the bus conductor needs to be removed for maintenance, the cover plate 27 can be removed, then the intermediate conductor 23 can be removed, and finally the intermediate conductor 23, the upper conductor 22, and the lower conductor 24 can be removed in sequence. Finally, the shielding cover 29 can be installed on the electrical connector 21 to fully isolate the transformer from the GIS.

[0048] Because the intermediate conductor 23 has an operating slot, it is highly susceptible to discharge during use. To prevent discharge at the intermediate conductor 23, a shielding conductor 25 is installed inside the operating slot of the intermediate conductor 23 in this embodiment. After the intermediate conductor 23, upper conductor 22, and lower conductor 24 are installed, the shielding conductor 25 is installed inside the operating slot using bolts. The shielding conductor 25 fills the operating slot, preventing discharge.

[0049] In this embodiment, aligning the busbar conductor with the upper housing 6 facilitates the installation and removal of the busbar using the handhole 26 on the upper housing 6. Furthermore, since the radial dimension of the busbar conductor is smaller than the radial dimension of the transformer bushing 20, the radial dimension of the upper housing 6 can be reduced.

[0050] In the above embodiments, the first connecting conductor and the second connecting conductor are used as the supporting connecting conductor and the adjusting connecting conductor, respectively, to facilitate the assembly of the surge arrester. In other embodiments, both the first and second connecting conductors can be supporting connecting conductors. In this embodiment, the screws at both ends of the surge arrester can be processed to be longer to accommodate different spacings between the first and second connecting conductors. Alternatively, both the first and second connecting conductors can be adjusting connecting conductors. In this embodiment, a separate support bracket can be provided for the surge arrester.

[0051] In the above embodiments, the blind hole is placed between two adjacent connecting holes to facilitate processing. In other embodiments, the blind hole can also be processed closer to the edge of the first or second flange.

[0052] In the above embodiments, blind holes and mounting bolts are used to fix the first and second connecting conductors to facilitate processing and assembly, and to prevent damage to the original insulation and sealing structure. In other embodiments, blind holes may not be provided; instead, studs are fixed to the first and second flanges. During assembly, the mounting holes on the first and second connecting conductors are fitted onto the corresponding studs, and nuts are installed on the studs to fix the first and second connecting conductors. In this embodiment, the studs have external threads, and the nuts constitute a threaded connection.

[0053] In the above embodiments, the first connecting conductor and the second connecting conductor are detachably connected to the first flange and the second flange, respectively, to facilitate assembly and subsequent maintenance and replacement. In other embodiments, the first connecting conductor and the second connecting conductor can also be welded and fixed to the first flange and the second flange, respectively.

[0054] In other embodiments of the housing connection structure of power supply or distribution equipment, the first housing and the second housing may also be housings of other power supply or distribution equipment, which will not be elaborated here.

[0055] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A housing connection structure for power supply or distribution equipment, comprising an insulating member and a first housing and a second housing disposed on both sides of the insulating member, the first housing having a first flange and the second housing having a second flange, characterized in that, A first connecting conductor is connected to the first flange, and a second connecting conductor is connected to the second flange. An overvoltage protection device is provided between the first connecting conductor and the second connecting conductor to be in an insulating state when the voltage difference between the two ends is lower than a set value and to be in a conducting state when it is higher than the set value.

2. The housing connection structure of the power supply or distribution equipment according to claim 1, characterized in that, The first flange is provided with a first threaded connector for connecting to and pressing the first connecting conductor. One of the first threaded connector and the first flange is provided with an external thread, and the other is provided with an internal thread. The second flange is provided with a second threaded connector for connecting to and pressing the second connecting conductor. One of the second threaded connector and the second flange is provided with an external thread, and the other is provided with an internal thread.

3. The housing connection structure of the power supply or distribution equipment according to claim 2, characterized in that, Both the first flange and the second flange have blind holes with internal threads on the side wall away from the insulating component. The first threaded connector is a first mounting bolt that connects to the blind hole on the first flange, and the second threaded connector is a second mounting bolt that connects to the blind hole on the second flange. The first connecting conductor has a first mounting hole for the first mounting bolt to pass through, and the second connecting conductor has a second mounting hole for the second mounting bolt to pass through.

4. The housing connection structure of the power supply or distribution equipment according to claim 3, characterized in that, The first flange, the second flange, and the insulating component are provided with corresponding circumferentially arranged connection holes, and connection bolt assemblies are provided in the connection holes. Blind holes are located between two adjacent connection holes.

5. The housing connection structure of the power supply or distribution equipment according to any one of claims 1-4, characterized in that, One of the first connecting conductor and the second connecting conductor is a support connecting conductor for supporting the overvoltage protection device, and the other is an adjusting connecting conductor for adapting to the height of the overvoltage protection device after bending.

6. The housing connection structure of the power supply or distribution equipment according to claim 5, characterized in that, The supporting connecting conductor is a flat plate structure.

7. The housing connection structure of the power supply or distribution equipment according to claim 5, characterized in that, The overvoltage protection device has an adjusting screw at one end connected to the adjusting connecting conductor. The adjusting connecting conductor has an adjusting opening for the adjusting screw to pass through. At least two adjusting nuts are threaded onto the adjusting screw, and there are adjusting nuts on both sides of the adjusting connecting conductor, so as to clamp the adjusting connecting conductor with the adjusting nuts.

8. The housing connection structure of the power supply or distribution equipment according to claim 5, characterized in that, The supporting connecting conductor and the adjusting connecting conductor are made of the same material, and the thickness of the supporting connecting conductor is 1.5-3 times that of the adjusting connecting conductor.

9. The housing connection structure of the power supply or distribution equipment according to any one of claims 1-4, characterized in that, An overvoltage protection device and its connected first and second connecting conductors constitute an overvoltage protection assembly, and at least two sets of the overvoltage protection assembly are provided.

10. The housing connection structure of the power supply or distribution equipment according to any one of claims 1-4, characterized in that, The overvoltage protection device is a surge arrester.

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