Temporary grounding device of high-voltage switch cabinet

Abstract

The utility model relates to the technical field of switch cabinet inspection and maintenance auxiliary tools, in particular to a temporary grounding device for a high-voltage switch cabinet, which comprises a moving contact matched with the switch cabinet in shape, the moving contact is mounted on a mounting sleeve, an insulating rod, an insulating sleeve and an insulating handle are sequentially arranged below the mounting sleeve, and a connecting point is arranged on the mounting sleeve. One end of the cable is connected with the connection point, the other end of the cable is provided with a jointing clamp, and the jointing clamp is connected to an on-site bottom line or a grounding end. According to the temporary grounding device for the high-voltage switch cabinet provided by the utility model, the moving contact matched with the static contact of the switch cabinet in shape is arranged, so that the moving contact can be stably connected with the static contact in the high-voltage switch cabinet, and connection looseness in the working process is prevented; and an insulating rod, an insulating sleeve and an insulating handle are arranged below the mounting sleeve, so that the device is convenient to move and use, the risk of electric shock in the use process is reduced, and the safety in the reconstruction and extension project of the switch cabinet is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of switch cabinet inspection and maintenance auxiliary tools, in particular to a temporary grounding device for a high-voltage switch cabinet. Background Art

[0002] With the improvement of daily electricity facilities, the number of renovation and expansion projects for small substations in various counties and districts is increasing. In the projects, it is necessary to add new switch cabinets to the high-voltage room of the small substation and incorporate them into the busbar. In order to ensure construction safety, after a power outage and before construction, it is necessary to open the busbar compartment on the top of the cabinet, remove the insulating sheath and conduct an electrical test, and the safety measure of installing a grounding wire must be completed. In the existing technology, the commonly used grounding method is to directly connect the grounding wire to the static contact to achieve device grounding. Due to the structural problems of the existing grounding wire, it cannot be firmly and reliably fixed on the static contact, resulting in low work safety during the switch cabinet renovation project. Therefore, in response to the above shortcomings, a temporary grounding device for high-voltage switch cabinets is proposed. Summary of the Invention

[0003] The purpose of the utility model is to provide a temporary grounding device for a high-voltage switch cabinet, so as to overcome the defect in the prior art that the existing grounding wire structure cannot be firmly and reliably fixed on the static contact, resulting in low working safety during the switch cabinet renovation project.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a temporary grounding device for a high-voltage switch cabinet, comprising:

[0005] An insulating rod, wherein a mounting sleeve is provided at the upper end of the insulating rod, a moving contact is provided at the top end of the mounting sleeve, and the shape of the moving contact matches the static contact in the high-voltage switchgear; a connection point is provided on the mounting sleeve, the connection point is connected to the cable, one end of the cable is connected to the connection point, and the other end is provided with a wiring clamp; an insulating sleeve is provided at the bottom end of the insulating rod, and an insulating handle is provided below the insulating sleeve; the insulating rod, insulating sleeve and insulating handle are made of insulating material, and the mounting sleeve is made of conductive material.

[0006] Preferably, the moving contact is a plum blossom contact, which is composed of a plurality of vertical contact pieces in a circumferential array, and a plurality of annular spring rings are sleeved on the outer side of the plum blossom contact.

[0007] Preferably, the cable is detachably connected to the mounting sleeve and the wiring clamp.

[0008] Preferably, mounting pieces are provided at both ends of the cable, the mounting piece at the top end of the cable is connected to the mounting sleeve, and the mounting piece at the end end is connected to the wiring clamp.

[0009] Preferably, the insulating sleeve is fixedly connected to the insulating handle, and the moving contact, the mounting sleeve, the insulating rod and the insulating sleeve are detachably connected.

[0010] Preferably, the wiring clamp includes a U-shaped main body, a clamping plate is provided on one side of the main body, a threaded rod is provided below the clamping plate and passes through the side of the main body, a tightening nut is provided at the end of the threaded rod, and the connecting piece at the end of the cable is provided with a mounting hole corresponding to the threaded rod.

[0011] Preferably, a protruding screw is provided on the connection point, and a mounting hole corresponding to the position of the screw is provided on the connecting piece at the top of the cable.

[0012] The utility model provides a temporary grounding device for high-voltage switch cabinet, which has the following beneficial effects:

[0013] The temporary grounding device for a high-voltage switch cabinet provided by the utility model is capable of stably connecting with the static contact in the high-voltage switch cabinet by providing a movable contact that matches the shape of the static contact of the switch cabinet, thereby preventing the connection from loosening during operation; by providing an insulating rod, an insulating sleeve and an insulating handle under the installation sleeve, the movement and use of the device are facilitated, the risk of electric shock during use is reduced, and the safety in switch cabinet renovation and expansion projects is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the structural diagram of the temporary grounding device for high-voltage switchgear.

[0015] Legend:

[0016] 1. Contact piece; 2. Moving contact; 3. Spring ring; 4. Mounting sleeve; 5. Connection point; 6. Cable; 7. Insulating rod; 8. Insulating sleeve; 9. Insulating handle; 10. Terminal clamp. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] like Figure 1 As shown, the utility model provides a temporary grounding device for a high-voltage switch cabinet, comprising:

[0019] An insulating rod 7 is provided with a mounting sleeve 4 at its top, and a movable contact 2 is provided at its top. The mounting sleeve 4 is made of a conductive material, typically steel. The shape of the movable contact 2 matches the static contact of the high-voltage switchgear. Due to this shape fit, installation can be completed by simply aligning the movable contact 2 with the static contact of the switchgear during operation. After installation, the movable contact 2 and the static contact fit tightly together. In subsequent operation, by installing a grounding component on the movable contact 2, the static contact can be stably and safely grounded through the movable contact 2, thereby improving the safety of the device.

[0020] The movable contact 2 is typically a plum blossom contact, formed by a circumferential array of vertical contact blades 1. A plurality of spring rings 3, formed by connecting springs end-to-end, are positioned over the plum blossom contact. While the size of the plum blossom contact remains constant, the maximum stable current it can withstand increases as the number of contact blades 1 increases. The spring rings 3 utilize their elasticity to constrain the contact blades 1, securing their position and improving the stability of the device. Plum blossom contacts of common sizes are generally available for purchase.

[0021] It should be noted that the movable contact 2 and the mounting sleeve 4 are detachably connected. In actual operation, the movable contact 2 can be replaced with a matching model according to the model of the static contact in the target switch cabinet. The movable contact 2 and the mounting sleeve 4 are connected by threads. When disassembling or installing, the movable contact 2 can be replaced by simply rotating it. No structural changes are required to the movable contact 2, and the normal operation of the movable contact 2 is not affected.

[0022] In the present invention, a mounting point 5 is provided on the mounting sleeve 4, which is used to connect with the grounding component to form a grounding circuit. When the moving contact 2 and the static contact are installed together, since the mounting sleeve 4 is made of conductive material, the charge of the static contact in the switch cabinet will be introduced into the moving contact 2, and then along the mounting sleeve 4 and the connection point 5 along the grounding component into the earth, thereby realizing the grounding work of the static contact in the high-voltage switch cabinet and improving the working stability of the expansion project of the high-voltage switch cabinet.

[0023] The grounding component includes a cable 6, one end of which is mounted on the connection point 5 and the other end is grounded. This allows the power drawn from the static contact by the mounting sleeve 4 and the moving contact 2 to be directed to the ground, thereby grounding the static contact. The cable 6 is detachably connected to the mounting point 5. When work is completed or cable 6 needs to be replaced, it can be removed and replaced with a new cable 6 or one that meets the operating conditions of the new switchgear. This improves the practicality of the device and reduces the difficulty and workload of maintenance work, thereby enhancing the practicality of the device.

[0024] It should be noted that the cable 6 and the connection point 5 are connected by connecting bolts. The connection point 5 is composed of several connecting bolts welded to the mounting sleeve 4 and perpendicular to the mounting sleeve 4. The top of the cable 6 is a connecting plate made of metal. The connecting plate is provided with a connecting hole corresponding to the position of the connecting bolt. After aligning the connecting hole with the connecting bolt, the connecting bolt is inserted into the connecting hole, and a nut is installed on the connecting bolt. The nut is tightened to cooperate with the connection point to clamp the connecting plate to complete the connection between the connecting sleeve 4 and the cable 6.

[0025] like Figure 1 As shown, in order to improve the grounding effect and stability of the cable 6, one end of the cable 6 is connected to the connection point 5, and the other end is provided with a wiring clamp 10. The opening of the wiring clamp 10 can be adjusted. During operation, the wiring clamp 10 is connected to the cable 6 and clamped on the grounding end or ground wire on site to achieve grounding of the device. At the same time, the opening of the wiring clamp 10 is reduced to improve the stability of the grounding of the device and prevent the grounding end from falling off during operation, resulting in failure of the grounding work.

[0026] The terminal clamp 10 comprises a U-shaped body with a clamping plate on one side. Below the clamping plate is a threaded rod extending through the side of the body, with an adjustment nut at the end. Rotating the adjustment nut, the threads act to move the rod up and down, thereby controlling the clamping plate's upward and downward movement. As the rod moves upward, the clamping plate and the side of the body gradually approach each other until they close. The grounding terminal or ground wire at the site is placed between the clamping plate and the side of the body, and the adjustment nut is adjusted to clamp the ground wire or terminal. This not only grounds the device but also improves its stability and prevents it from falling off during operation, leading to grounding failure.

[0027] It's important to note that the connection between cable 6 and terminal clamp 10 is typically similar to that of mounting sleeve 4. Cable 6 is equipped with a connecting piece at each end: the top piece connects to mounting sleeve 4, and the end piece connects to terminal clamp 10. Terminal clamp 10 is equipped with threaded studs in several directions, and the connecting piece at the end of cable 6 has corresponding connection holes. After inserting the threaded studs into the connection holes at the end of cable 6, a nut is installed on the threaded studs to tighten the cable 6 end, completing the connection between cable 6 and terminal clamp 10. If cable 6 or terminal clamp 10 is damaged, the nut can be removed to replace or repair the cable 6 or terminal clamp 10.

[0028] In the present invention, the insulating rod 7 and the mounting sleeve 4 are detachably connected and made of an insulating material. During operation, by replacing the insulating rod 7 with different lengths, the device can be adapted to high-voltage switchgear of varying sizes, thereby improving the device's applicability. To enhance the device's structural strength, the movable contact 2 and the mounting sleeve 4 can be fixedly connected, such as by welding. In actual operation, the user only needs to select the appropriate movable contact 2 size and insulating rod 7 length for direct assembly.

[0029] The bottom end of the insulating rod 7 is provided with a circumferentially raised insulating sleeve 8, and an insulating handle is provided below the insulating sleeve 8. The insulating sleeve 8, insulating handle 9, and insulating rod 7 are generally made of the same insulating material. The insulating handle 9 serves as the holding portion of the device, and the operator adjusts the position and direction of the device by lifting the insulating handle 9 during operation. Since the insulating rod 7, insulating sleeve 8, and insulating handle 9 are all made of insulating materials, the electricity on the static contact of the switch cabinet will not be transferred to the insulating handle, and the operator can operate with confidence. The insulating sleeve 8 and insulating handle 9 are fixedly connected, and the insulating sleeve 8 and insulating rod 9 are detachably connected.

[0030] To prevent damage to the insulating rod 7 from repeated assembly and disassembly, the insulating rod 7 and mounting sleeve 4 are typically not removed after work is complete, but remain connected for storage. During operation, the insulating sleeve 8 and insulating handle 9 are connected to the insulating rod 7, maintaining good insulation and improving safety, preventing electric shock accidents. Furthermore, if a small amount of liquid is present on the insulating rod 7, it will drip directly along the circumferentially raised insulating sleeve 8, avoiding contact with the insulating handle 9, further enhancing device safety.

[0031] It should be noted that the insulating handle 9 is a telescopic structure. The insulating handle 9 includes several sleeves of different diameters, which are arranged concentrically and arranged outward in order from small to large diameter. Between two adjacent sleeves, the bottom end of the inner sleeve and the top end of the outer sleeve are provided with a matching step structure and an interference fit. When the inner sleeve moves upward to the top end, it will not separate from the outer sleeve and can maintain the extended state through the interference fit between the two. The top end of the innermost sleeve is connected to the bottom end of the insulating sleeve 8. During operation, the length of the insulating handle can be adjusted by stretching the position of each sleeve.

[0032] Combine Figure 1 The following describes in detail the steps of the temporary grounding device of the high-voltage switchgear when it is working:

[0033] Step 1: Select the appropriate moving contact and insulating rod according to the on-site working environment, and connect the insulating rod to the mounting sleeve under the moving contact.

[0034] Step 2: Connect the insulating sleeve and insulating handle to the bottom end of the insulating rod and adjust the length of the insulating handle.

[0035] Step 3: Connect both ends of the cable to the wiring clamp and the installation sleeve respectively, and connect the wiring clamp to the bottom line or ground terminal at the work site.

[0036] Step 4: Align the moving contact with the static contact in the target switch cabinet and insert it. At this point, the moving contact and the static contact are installed and tightly matched, forming a complete grounding circuit. The power on the static contact can be directed to the earth through the moving contact, mounting sleeve, cable and terminal clamp in sequence, thus completing the grounding process.

[0037] Step 5: Carry out the renovation and expansion work on the switch cabinet according to the predetermined plan, and recycle the equipment after the work is completed.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A temporary grounding device for a high-voltage switch cabinet, characterized in that: include: An insulating rod (7), wherein the upper end of the insulating rod (7) is provided with a mounting sleeve (4), the top end of the mounting sleeve (4) is provided with a moving contact (2), the shape of the moving contact (2) being matched with the static contact in the high-voltage switch cabinet; a connection point (5) is provided on the mounting sleeve (4), the connection point (5) is connected to the cable (6), one end of the cable (6) is connected to the connection point (5), and the other end is provided with a wiring clamp (10); an insulating sleeve (8) is provided at the bottom end of the insulating rod (7), and an insulating handle (9) is provided below the insulating sleeve (8); the insulating rod (7), the insulating sleeve (8) and the insulating handle (9) are made of insulating material, and the mounting sleeve (4) is made of conductive material; the insulating sleeve (8) is circumferentially protruding on the surface of the insulating rod (7); the wiring clamp (10) includes a U-shaped main body, a clamping plate is provided on one side of the main body, a threaded rod is provided below the clamping plate and passes through the side of the main body, a tightening nut is provided at the end of the threaded rod, and a connecting piece at the end of the cable (6) is provided with a mounting hole corresponding to the threaded rod.

2. The temporary grounding device for high-voltage switchgear according to claim 1, characterized in that: The moving contact (2) is a plum blossom contact, which is composed of a plurality of vertical contact pieces (1) in a circumferential array, and a plurality of annular spring rings (3) are sleeved on the outer side of the plum blossom contact.

3. The temporary grounding device for high-voltage switchgear according to claim 1, characterized in that: The cable (6) is detachably connected to the mounting sleeve (4) and the wiring clamp (10).

4. The temporary grounding device for high-voltage switchgear according to claim 2, characterized in that: Both ends of the cable (6) are provided with mounting pieces, respectively. The mounting piece at the top end of the cable (6) is connected to the mounting sleeve (4), and the mounting piece at the end end is connected to the wiring clamp (10).

5. The temporary grounding device for high-voltage switchgear according to claim 1, characterized in that: The insulating sleeve (8) and the insulating handle (9) are fixedly connected, and the moving contact (2), the mounting sleeve (4), the insulating rod (7) and the insulating sleeve (8) are detachably connected.

6. The temporary grounding device for high-voltage switchgear according to claim 4, characterized in that: A protruding screw is provided on the connection point (5), and a mounting hole corresponding to the position of the screw is provided on the connection piece at the top end of the cable (6).

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