Grounding protection device for parameter test of power transmission line of low-voltage cabinet
By using a rotating shaft and a grinding device to remove paint, dust, and rust from the cabinet surface in the low-voltage switchgear transmission line parameter testing grounding protection device, the problem of poor grounding protection effect of low-voltage switchgear was solved, and more efficient grounding connection and safety testing were achieved.
Patent Information
- Application Number
- CN202422880962.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-26
AI Technical Summary
The insulating varnish layer, dust, and rust on the surface of the low-voltage switchgear affect the grounding protection effect, resulting in poor test safety.
A grounding protection device for testing transmission line parameters of a low-voltage switchgear was designed, comprising a sealing cover, a rotating shaft, a grinding device, and a grounding wire. The rotating shaft drives the grinding device to grind the surface of the switchgear, removing paint, dust, and rust, thereby improving the quality of the grounding connection.
By grinding away surface obstructions, the effectiveness of grounding protection and testing safety are improved. The operation is simple and convenient.
Smart Images
Figure CN223552866U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of low-voltage switchgear testing and grounding protection technology, specifically a low-voltage switchgear transmission line parameter testing and grounding protection device. Background Technology
[0002] Low-voltage switchgear plays a crucial role in power distribution. It effectively transmits electrical energy from the grid to various power terminals, meeting diverse power needs. Furthermore, as a power collection and distribution center, it rationally distributes input power signals to equipment requiring power, achieving efficient energy allocation. For safety, the switchgear is equipped with protective devices such as fuses, air switches, and residual current devices (RCDs), which can promptly cut off power in case of abnormal current, protecting personnel and equipment. When testing the switchgear's parameters, to prevent accidental energization due to circuit problems, a temporary grounding protection device needs to be added. Generally, grounding is achieved by connecting a wire to the ground wire on the switchgear surface. However, the switchgear surface usually has an insulating varnish layer, resulting in poor performance from directly connected wires. Additionally, residual dust and rust on the cabinet surface can also negatively impact grounding protection, affecting the safety of the test. Utility Model Content
[0003] (a) Technical problems to be solved
[0004] To address the shortcomings of existing technologies, this utility model provides a grounding protection device for testing parameters of low-voltage switchgear transmission lines. It solves the problems that the surface of the switchgear usually has a layer of insulating paint, which leads to poor performance of directly connected wires. Furthermore, the surface of the switchgear is also prone to residual dust and rust, which can also result in poor grounding protection and affect the safety of the test.
[0005] (II) Technical Solution
[0006] To achieve the above objectives, this utility model provides the following technical solution: a grounding protection device for testing parameters of a low-voltage switchgear transmission line, comprising a sealing cover, an adsorption ring for adsorbing and fixing the bottom of the sealing cover to the cabinet body, a rotating shaft rotatably mounted on the top of the sealing cover via a bearing, the bottom end of the rotating shaft penetrating the sealing cover and extending into the interior of the sealing cover, a grinding device for grinding the surface of the cabinet body to improve the grounding conductor effect mounted on the bottom end of the rotating shaft, an anti-detachment cap mounted on the top of the rotating shaft, a limiting sleeve sleeved on the outer side of the rotating shaft, a return spring mounted on the top of the anti-detachment cap, the top end of the return spring being installed on the inner wall of the top of the limiting sleeve, a pressing handle rotatably mounted on the top of the limiting sleeve via a one-way bearing, a connecting bearing mounted on the outer wall of the rotating shaft above the sealing cover, a grounding wire mounted on the movable end of the outer wall of the connecting bearing, the end of the grounding wire away from the connecting bearing being divided into two wire ends, each wire end being equipped with a wiring terminal and a wiring clamp for wiring.
[0007] Preferably, the grinding device includes a mounting base, a radial groove, a slide block, a support base, a grinding disc, a support ball, a positioning post, an elastic pull rope, an outer connecting cover, a grounding contact ring, and a downward pressure spring. The mounting base is installed at the bottom end of the rotating shaft. The radial groove is formed at the bottom of the mounting base. The slide block is slidably engaged inside the radial groove. The support base is installed at the bottom of the slide block. The grinding disc is installed at the bottom of the support base. The support ball is installed at the top of the support base and located on the right side of the slide block. The positioning post is installed at the center of the bottom of the mounting base. The elastic pull rope is installed on the outer wall of the positioning post. The end of the elastic pull rope away from the positioning post is installed on the left side wall of the support base. The outer connecting cover is movably engaged on the outside of the mounting base. The grounding contact ring is installed at the bottom of the outer connecting cover. The downward pressure spring is sleeved on the outside of the rotating shaft. The bottom end of the downward pressure spring is installed on the top of the outer connecting cover. The top end of the downward pressure spring is installed on the outer wall of the rotating shaft.
[0008] Preferably, the outer wall of the rotating shaft is provided with a threaded ring, and the inner wall of the bottom end of the limiting sleeve is provided with a matching threaded groove.
[0009] Preferably, both the outer and inner surfaces of the connecting bearing are coated with a thin layer of conductive metal to improve conductivity.
[0010] Preferably, the grinding disc is made of a wire mesh.
[0011] Preferably, the top right side of the support base is formed by an inclined surface, and the bottom inner side of the grounding contact ring is formed by an inclined surface, with the highest point of the bottom inclined surface of the grounding contact ring being higher than the lowest point of the top inclined surface of the support base.
[0012] Compared with the prior art, this utility model provides a grounding protection device for testing parameters of low-voltage switchgear transmission lines, which has the following beneficial effects:
[0013] 1. This low-voltage switchgear transmission line parameter testing grounding protection device, through the cooperation of a rotating shaft, a limit sleeve, and a handle, converts the pressing force on the handle into a rotational force that drives the rotating shaft to rotate. The rotating shaft then drives a grinding device to rotate and grind the contact surface. This grinding removes paint, dust, and rust from the contact surface of the grounding connection, improving the quality of subsequent grounding and enhancing the protection effect.
[0014] 2. This low-voltage switchgear transmission line parameter testing grounding protection device, when the rotating shaft drives the grinding device to rotate, the support base moves outward under the action of centrifugal force and pulls the elastic rope to undergo elastic deformation. The support base moves to the lower side of the grounding contact ring, and pushes the grounding contact ring upward. At the same time, the support base drives the grinding disc to move to the lower side of the grounding contact ring to rotate and grind the cabinet surface below the grounding contact ring. After the grinding is completed, the grinding device stops rotating, and the elastic rope pulls the support base inward to retract to its original position. The lower spring presses the outer connecting cover and the grounding contact ring downward to contact the ground surface. The grinding position of the grinding disc is controlled by the centrifugal force of rotation. The operation is simple, and the grinding and automatic bonding connection can be completed in one step. It is convenient to use. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0017] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle.
[0018] The components are as follows: 1. Sealing cover; 2. Adsorption ring; 3. Rotating shaft; 31. Anti-detachment cap; 4. Limiting sleeve; 41. Return spring; 5. Handle; 6. Grinding device; 61. Mounting base; 62. Radial groove; 63. Slide seat; 64. Support base; 65. Grinding disc; 66. Support ball; 67. Positioning post; 68. Elastic pull rope; 69. External connecting clip cover; 70. Grounding contact ring; 71. Downward pressure spring; 7. Connecting bearing; 8. Grounding wire; 81. Terminal block; 82. Terminal clamp. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figure 1-3 This utility model provides a grounding protection device for testing transmission line parameters in a low-voltage switchgear, comprising a sealing cover 1, an adsorption ring 2 for adsorbing and fixing to the cabinet body at the bottom of the sealing cover 1, a rotating shaft 3 rotatably mounted on the top of the sealing cover 1 via a bearing, the bottom end of the rotating shaft 3 penetrating the sealing cover 1 and extending into the interior of the sealing cover 1, a grinding device 6 for grinding the surface of the cabinet body to improve the grounding conductor effect at the bottom end of the rotating shaft 3, an anti-detachment cap 31 mounted on the top of the rotating shaft 3, a limiting sleeve 4 sleeved on the outer side of the rotating shaft 3, a return spring 41 mounted on the top of the anti-detachment cap 31, the top end of the return spring 41 being installed on the top inner wall of the limiting sleeve 4, and a pressing device rotatably mounted on the top of the limiting sleeve 4 via a one-way bearing. The grip handle 5 is equipped with a one-way bearing to prevent the limiting sleeve 4 from rotating when the grip handle 5 is pressed down. The limiting sleeve 4 drives the rotating shaft 3 to rotate through the thread. When the grip handle 5 is pressed, the return spring 41 restores its deformation and pushes the limiting sleeve 4 to move upward and rotate. The outer surface of the grip handle 5 is covered with a rubber sleeve to prevent electric shock when the hand is holding the grip handle 5 during installation, thus improving safety. A connecting bearing 7 is installed on the outer wall of the rotating shaft 3 above the sealing cover 1. A grounding wire 8 is installed on the movable end of the outer wall of the connecting bearing 7. The end of the grounding wire 8 away from the connecting bearing 7 is divided into two wire ends, and the two wire ends are respectively equipped with a terminal block 81 and a wire clamp 82 for wiring.
[0021] Furthermore, the grinding device 6 includes a mounting base 61, a radial groove 62, a slide block 63, a support base 64, a grinding disc 65, a support ball 66, a positioning post 67, an elastic pull rope 68, an outer connecting cover 69, a grounding contact ring 70, and a downward pressure spring 71. The mounting base 61 is installed at the bottom of the rotating shaft 3. The radial groove 62 is formed at the bottom of the mounting base 61. The slide block 63 is slidably engaged inside the radial groove 62. The support base 64 is installed at the bottom of the slide block 63. The grinding disc 65 is installed at the bottom of the support base 64. The support ball 66 is installed on the top of the support base 64 and located on the right side of the slide block 63. The positioning post 67 and... The mounting base 61 is installed at its bottom center position. The elastic pull rope 68 is installed on the outer wall of the positioning stake 67. The end of the elastic pull rope 68 away from the positioning stake 67 is installed on the left side wall of the support base 64. The outer connecting cover 69 is movably snapped onto the outside of the mounting base 61. The grounding contact ring 70 is installed at the bottom of the outer connecting cover 69. The pressure spring 71 is sleeved on the outside of the rotating shaft 3. The bottom end of the pressure spring 71 is installed on the top of the outer connecting cover 69. The top end of the pressure spring 71 is installed on the outer wall of the rotating shaft 3. The grounding connection position on the surface of the cabinet is polished by the polishing device 6 to improve the grounding quality and ensure safety during testing.
[0022] Furthermore, the outer wall of the rotating shaft 3 is provided with a threaded ring, and the inner wall of the bottom end of the limiting sleeve 4 is provided with a matching threaded groove. By pressing the grip handle 5, the limiting sleeve 4 is driven to move downward. The limiting sleeve 4 drives the rotating shaft 3 to rotate through the threaded engagement, and the rotating shaft 3 drives the grinding device 6 to perform rotational grinding work.
[0023] Furthermore, both the outer and inner surfaces of the connecting bearing 7 are coated with a thin layer of conductive metal to improve conductivity, thereby enhancing the conductivity between the inner and outer surfaces of the connecting bearing 7. After the grinding device 6 completes the grinding, the grounding contact ring 70 contacts the surface of the low-voltage cabinet. Through the cooperation of the grounding contact ring 70, the outer connecting clip 69, the mounting base 61, the rotating shaft 3, and the connecting bearing 7, the low-voltage cabinet is electrically connected to the grounding wire 8. Then, it is directly connected to the ground wire through the wiring terminal 81 or the wiring clamp 82, thereby achieving grounding protection for the low-voltage cabinet and improving the safety during subsequent testing.
[0024] Furthermore, the grinding disc 65 is made of woven wire mesh. By rotating the grinding disc 65, the grounding connection position on the surface of the low-voltage switchgear is grounded and cleaned, thereby improving the conductivity during connection.
[0025] Furthermore, the top right side of the support base 64 is provided with an inclined surface, and the bottom inner side of the grounding contact ring 70 is provided with an inclined surface. The highest point of the inclined surface at the bottom of the grounding contact ring 70 is higher than the lowest point of the inclined surface at the top of the support base 64. When the support base 64 moves outward, the inclined surface at the top of the support base 64 contacts the inclined surface at the bottom of the grounding contact ring 70, pushing the grounding contact ring 70 upward. Then, the support base 64 drives the grinding disc 65 to move below the grounding contact ring 70 to grind and clean the position where the grounding contact ring 70 contacts the surface of the low-voltage cabinet.
[0026] In use, first connect the terminal block 81 or the clamp 82 to the ground busbar. Then, attach the device to the surface of the low-voltage cabinet using the suction ring 2. Next, hold the handle 5 and press it down. The handle 5 presses down on the limiting sleeve 4, which moves downward along the outside of the rotating shaft 3. The limiting sleeve 4 compresses the return spring 41. At the same time, the rotating shaft 3 rotates under the constraint of the thread. The rotating shaft 3 drives the mounting base 61 to rotate, which in turn drives the slide 63 to rotate. The slide 63 drives the support base 64 and the grinding disc 65 to rotate. The centrifugal force generated by the rotation drives the slide 63 to slide outward along the radial groove 62. As the slide 63 moves outward, the elastic rope 68 is stretched and deformed. The slide 63 moves outward, causing the support base 64 to move outward. When the support base 64 moves to the bottom of the grounding contact ring 70, it pushes the grounding contact ring 70 upward. The bottom inclined surface is supported above the support ball 66. The grounding contact ring 70 drives the outer connecting cover 69 to move upward and compress the downward spring 71. At the same time, the support seat 64 drives the grinding disc 65 to move to the bottom of the grounding contact ring 70. The grinding disc 65 grinds the surface of the low-voltage cabinet below the grounding contact ring 70. After grinding, the repeated pressing of the grip handle 5 stops, the slide 63 stops rotating, and the elastic pull rope 68 restores its deformation and pulls the support seat 64 and the grinding disc 65 to move inward, so that the support seat 64 releases its support for the grounding contact ring 70. The downward spring 71 restores its deformation and presses the outer connecting cover 69, causing the grounding contact ring 70 to move downward, so that the grounding contact ring 70 contacts the grounded surface of the low-voltage cabinet. Through the cooperation of the grounding contact ring 70, the outer connecting cover 69, the mounting seat 61, the rotating shaft 3 and the connecting bearing 7, the low-voltage cabinet is electrically connected to the grounding wire 8, thereby completing the grounding protection work.
[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A grounding protection device for testing parameters of a low-voltage switchgear transmission line, comprising a sealing cover (1), characterized in that: The bottom of the sealing cover (1) is equipped with an adsorption ring (2) for adsorption and fixation with the cabinet. The top of the sealing cover (1) is rotatably mounted with a rotating shaft (3) via a bearing. The bottom end of the rotating shaft (3) passes through the sealing cover (1) and extends into the interior of the sealing cover (1). The bottom end of the rotating shaft (3) is equipped with a polishing device (6) for polishing the surface of the cabinet to improve the grounding wire effect. The top end of the rotating shaft (3) is equipped with an anti-detachment cap (31). The outer side of the rotating shaft (3) is sleeved with a limiting sleeve (4). The top end of the anti-detachment cap (31) is equipped with a... A reset spring (41) is installed at its top end on the inner wall of the top of the limiting sleeve (4). A grip (5) for pressing is rotatably installed at the top end of the limiting sleeve (4) via a one-way bearing. A connecting bearing (7) is installed on the outer wall of the rotating shaft (3) above the sealing cover (1). A grounding wire (8) is installed at the movable end of the outer wall of the connecting bearing (7). The end of the grounding wire (8) away from the connecting bearing (7) is divided into two wire ends. A terminal block (81) and a wire clamp (82) for wiring are respectively installed at the two wire ends.
2. The low-voltage switchgear transmission line parameter testing grounding protection device according to claim 1, characterized in that: The grinding device (6) includes a mounting base (61), a radial groove (62), a slide (63), a support base (64), a grinding disc (65), a support ball (66), a positioning post (67), an elastic pull rope (68), an outer connecting cover (69), a grounding contact ring (70), and a downward pressure spring (71). The mounting base (61) is installed at the bottom end of the rotating shaft (3). The radial groove (62) is formed at the bottom of the mounting base (61). The slide (63) is slidably engaged inside the radial groove (62). The support base (64) is installed at the bottom of the slide (63). The grinding disc (65) is installed at the bottom of the support base (64). The support ball (66) is installed on the support base (61). 64) The top is located on the right side of the slide (63). The positioning stake (67) is installed at the bottom center of the mounting base (61). The elastic pull rope (68) is installed on the outer wall of the positioning stake (67). The end of the elastic pull rope (68) away from the positioning stake (67) is installed on the left side wall of the support base (64). The outer connecting cover (69) is movably snapped onto the outside of the mounting base (61). The grounding contact ring (70) is installed at the bottom of the outer connecting cover (69). The downward pressure spring (71) is sleeved on the outside of the rotating shaft (3). The bottom end of the downward pressure spring (71) is installed on the top of the outer connecting cover (69). The top end of the downward pressure spring (71) is installed on the outer wall of the rotating shaft (3).
3. The low-voltage switchgear transmission line parameter testing grounding protection device according to claim 1, characterized in that: The outer wall of the rotating shaft (3) is provided with a threaded ring, and the inner wall of the bottom end of the limiting sleeve (4) is provided with a matching threaded groove.
4. The low-voltage switchgear transmission line parameter testing grounding protection device according to claim 1, characterized in that: The outer and inner surfaces of the connecting bearing (7) are coated with a thin layer of conductive metal to improve conductivity.
5. A grounding protection device for testing low-voltage switchgear transmission line parameters according to claim 2, characterized in that: The grinding disc (65) is made of woven wire mesh.
6. A grounding protection device for testing low-voltage switchgear transmission line parameters according to claim 2, characterized in that: The top right side of the support base (64) is provided with an inclined surface, and the bottom inner side of the grounding contact ring (70) is provided with an inclined surface. The highest point of the bottom inclined surface of the grounding contact ring (70) is higher than the lowest point of the top inclined surface of the support base (64).