Switch cabinet local maintenance anti-electric shock handcart

Abstract

The utility model relates to a switch cabinet technical field especially relates to a switch cabinet local overhauling anti-electric shock handcart, be equipped with traction component and insulation protection component in this handcart, the bottom of traction component is connected with the screw rod of screw rod drive mechanism installed in switch cabinet, insulation protection component includes mounting bracket, insulation baffle, plugging strip and locking assembly, the shape of mounting bracket is "L" type, its bottom surface fixed mounting is in traction component, insulation baffle is detachably installed in the upper portion or lower portion of mounting bracket, the first end of plugging strip is fixedly installed in the middle part of mounting bracket, and the second end of plugging strip stretches out from mounting bracket, the first end of locking assembly is detachably installed in the bottom of mounting bracket, in this way, when traction component is located in the working position, the second end of plugging strip forms the physical isolation barrier between the static contact box of busbar side and line side, and forms the insulation barrier outside the isolation baffle through insulation baffle, thereby making the safety cabinet not in the full stop state also can overhaul.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, and in particular to a switchgear partial maintenance anti-electric shock handcart. Background Technology

[0002] High-voltage switchgear is a key piece of equipment in power systems used for power distribution, equipment protection, and operation control. Based on the installation method of its main circuit components, it can be divided into two types: fixed type and truck type. Truck-type switchgear achieves rapid isolation and maintenance of the equipment by moving a truck. The principle is that the truck moves along guide rails inside the switchgear via rollers mounted on its bottom, and precise positioning of the truck is achieved by a screw drive mechanism mounted on the switchgear. Specifically, the screw of the screw drive mechanism is mounted on the switchgear via bearings and extends to the operating hole on the switchgear panel. The drive nut of the truck chassis is threadedly connected to the screw of the drive mechanism. During operation, the operating handle is inserted into the operating hole on the switchgear panel to connect with the screw drive, thereby driving the screw to rotate. The rotating drive nut moves linearly along the lead screw, thereby driving the entire handcart to move between the working position and the isolation position. When the handcart enters the working position, the two fixed blocks on the handcart chassis press the corresponding rocker arm linkage mechanism on the switchgear, thereby opening the isolation baffles on the stationary contact boxes on the bus side and line side of the switchgear, respectively, so that the moving contact on the handcart can reliably connect with the stationary contact in the stationary contact box on the bus side and line side. When the handcart exits to the isolation position, the moving contact on the handcart separates from the stationary contact in the stationary contact box, and the two fixed blocks on the handcart chassis separate from the rocker arm linkage mechanism on the switchgear. The rocker arm linkage mechanism is activated by the reset mechanism (such as a spring), driving the isolation baffles on the stationary contact boxes on the bus side and line side to close automatically.

[0003] When performing maintenance work inside the switchgear, if it is necessary to open the isolation baffle on the busbar side or line side of the stationary contact box to inspect, clean, or replace parts inside the stationary contact box, according to the relevant safety requirements of the substation, it must be ensured that both the busbar side and line side stationary contact boxes of the switchgear are de-energized, that is, the switchgear must be in a completely shut-down state. This is because if only the busbar side or line side stationary contact box of the switchgear is de-energized, there will be the following safety hazards: 1. Although the isolation baffle itself is made of insulating materials such as epoxy resin, there are inevitably gaps between it and the switchgear cabinet. In addition, the space inside the cabinet is narrow. When operators perform maintenance operations such as tightening bolts, measuring dimensions, and cleaning dust at close range, they are very likely to accidentally insert or drop metal tools into the vicinity of the energized stationary contact box area due to operational errors, resulting in electric shock or arc explosion; 2. The isolation baffle will age under the long-term influence of strong electric fields, partial discharge, mechanical stress, and environmental temperature and humidity. This leads to a decrease in insulation strength. If the static contact box is energized, there is a risk that the aging isolation baffle will be broken down by high voltage, causing the static contact box area under maintenance to become accidentally energized, endangering the safety of operators. However, requiring the complete shutdown of the switchgear for only partial maintenance will have the following negative impacts: 1. Expanding the power outage area: Putting the switchgear in a complete shutdown state for the maintenance of the bus or line side equipment of the switchgear will force the operation of switchgear or power supply circuits that do not need to be shut down, and even the upstream power supply or downstream loads associated with them, to be interrupted, causing unnecessary large-scale power outages; 2. Increasing the risk of power grid operation: Expanding the power outage area will weaken the integrity of the power grid structure and reduce the reliability and stability of power supply, especially during peak load periods or weak links in the power grid, which can easily trigger cascading failures; 3. Economic losses: Unnecessary power outages cause load losses that directly affect the normal production, life and business activities of users, and may cause huge economic losses or even social impacts for important users such as hospitals, factories and data centers. Utility Model Content

[0004] In view of this, it is necessary to provide a switchgear partial maintenance electric shock protection handcart that allows maintenance of the stationary contact boxes on the bus or line side of the switchgear without having to shut down the switchgear completely, thereby reducing the negative impact of a complete switchgear shutdown.

[0005] This utility model provides a handcart for partial maintenance of switchgear to prevent electric shock, including a traction component and an insulating protection component. The bottom of the traction component can be threadedly connected to the lead screw of a lead screw transmission mechanism installed inside the switchgear, so as to move to the working position or the isolation position under the drive of the lead screw transmission mechanism. The insulating protection component includes a mounting frame, an insulating partition, a sealing strip, and a locking assembly. The mounting frame is L-shaped, and its bottom surface is fixedly mounted on the traction component. The insulating partition is detachably mounted on the upper or lower part of the side of the mounting frame, and is used to protect the busbar side or isolation position of the switchgear when the traction component moves to the working position. The outer surface of the isolation baffle on the line side is covered; the first end of the sealing strip is fixedly installed in the middle of the mounting frame, and the second end of the sealing strip extends from the mounting frame, so as to extend between the busbar side and the line side stationary contact box of the switchgear when the traction component moves to the working position, forming a physical isolation barrier that separates the busbar side stationary contact box and the line side stationary contact box; the first end of the locking component is detachably installed at the bottom of the mounting frame, so as to press the rocker arm linkage mechanism corresponding to the isolation baffle on the busbar side or the line side of the switchgear when the traction component moves to the working position, thereby opening the isolation baffle on the busbar side or the line side of the switchgear.

[0006] Preferably, the traction component includes a traction frame and at least four traction pulleys. Each traction pulley is rotatably mounted on the traction frame and symmetrically distributed on both sides of the traction frame. The outer edge of each traction pulley is rotatably mounted on the guide rail of the switchgear so that the traction frame can slide along the guide rail of the switchgear.

[0007] Preferably, the traction frame has a drive hole, which is threadedly connected to the lead screw of the switch cabinet's lead screw transmission mechanism, so that the traction frame can slide along the guide rail of the switch cabinet under the drive of the lead screw transmission mechanism.

[0008] Preferably, the top of the mounting frame is provided with a first arc-shaped groove for engaging with the top of the insulating partition when the insulating partition is installed on the upper part of the mounting frame; the bottom of the mounting frame is provided with a second arc-shaped groove for engaging with the bottom of the insulating partition when the insulating partition is installed on the lower part of the mounting frame.

[0009] Preferably, the mounting bracket has a first locking groove and a second locking groove symmetrically opened on both sides with the sealing strip as the axis of symmetry, and the first locking groove is located above the second locking groove.

[0010] Preferably, the second end of the locking assembly extends detachably into the first locking groove or the second locking groove and engages with the lower or upper end of the insulating partition in the installation position to lock the insulating partition onto the mounting bracket.

[0011] Preferably, the locking assembly includes two first locking members and two first striking blocks. The first end of each first locking member is detachably mounted on the bottom of the mounting frame, and the second end is detachably inserted into the first locking groove for engaging with the bottom of the insulating partition when the insulating partition is mounted on the upper part of the mounting frame, thereby locking the insulating partition on the mounting frame. Each first striking block is fixedly mounted on the side of the first end of a first locking member for pressing the corresponding rocker arm linkage mechanism on the switchgear when the traction member moves to the working position, thereby opening the isolation baffle on the line side of the switchgear.

[0012] Preferably, the locking assembly includes two second locking members and two second striking blocks. The first end of each second locking member is detachably mounted on the bottom of the mounting frame, and the second end is detachably inserted into the second locking groove for engaging with the upper part of the insulating partition when the insulating partition is installed on the lower part of the mounting frame, thereby locking the insulating partition on the mounting frame. Each second striking block is fixedly mounted on the side of the first end of a second locking member for pressing the corresponding rocker arm linkage mechanism on the switchgear when the traction member moves to the working position, thereby opening the isolation baffle on the busbar side of the switchgear.

[0013] The aforementioned switchgear partial maintenance anti-electric shock handcart is equipped with a traction component and an insulation protection component. The bottom of the traction component can be threadedly connected to the lead screw of the lead screw drive mechanism installed inside the switchgear, so as to move to the working position or isolation position under the drive of the lead screw drive mechanism. The insulation protection component includes a mounting bracket, an insulating partition, a sealing strip, and a locking assembly. The mounting bracket is L-shaped, and its bottom surface is fixedly installed on the traction component. The insulating partition is detachably installed on the upper or lower part of the mounting bracket, and is used to protect the busbar side or line side of the switchgear through the insulating partition when the traction component moves to the working position. An isolation baffle provides shielding; the first end of a sealing strip is fixedly installed in the middle of the mounting frame, and the second end of the sealing strip extends from the mounting frame. When the traction component moves to the working position, it extends between the busbar side and the line side stationary contact box of the switchgear to form a physical isolation barrier that separates the busbar side stationary contact box and the line side stationary contact box; the first end of the interlocking assembly is detachably installed at the bottom of the mounting frame. When the traction component moves to the working position, it presses the rocker arm linkage mechanism corresponding to the isolation baffle on the busbar side or the line side of the switchgear, thereby opening the isolation baffle on the busbar side or the line side of the switchgear.

[0014] Thus, when inspecting the stationary contact box on the busbar side of the switchgear, the insulating partition is installed on the lower part of the side of the mounting bracket. When the traction component moves to the working position under the drive of the screw drive mechanism, the first end of the interlocking component presses against the rocker arm linkage mechanism corresponding to the isolation baffle on the busbar side inside the switchgear, causing the isolation baffle on the busbar side to open. The second end of the sealing strip extends into the space between the stationary contact box on the busbar side and the stationary contact box on the line side, forming a physical isolation barrier, thereby preventing metal tools held by the operator from entering through the line. The gaps in the roadside isolation barrier allow it to extend into or fall into the stationary contact box on the line side. Simultaneously, an insulating partition covers the outer surface of the line-side isolation barrier, forming an additional insulating barrier. Even if the line-side isolation barrier is punctured by high voltage, the insulating partition effectively blocks the discharge path, preventing accidental energization of the stationary contact box on the busbar side, thus preventing electric shock accidents. When inspecting the stationary contact box on the line side of the switchgear, the insulating partition is installed on the upper part of the side of the mounting bracket. When the traction component moves to the working position under the drive of the screw transmission mechanism, the first end of the locking component presses against the rocker arm linkage mechanism corresponding to the isolation baffle on the line side inside the switchgear, causing the isolation baffle on the line side to open. The second end of the sealing strip extends into the stationary contact box on the line side and the stationary contact box on the busbar side to form a physical isolation barrier, thereby preventing metal tools held by the operator from being inserted into or falling into the stationary contact box on the busbar side through the gap of the isolation baffle on the busbar side. At the same time, the insulating partition covers the outer surface of the isolation baffle on the busbar side, forming an additional insulating barrier on the isolation baffle. Even if the isolation baffle on the busbar side is broken down by high voltage, the insulating partition can effectively block the discharge channel and prevent the stationary contact box on the line side from being accidentally energized, thereby preventing electric shock accidents. Therefore, when the switchgear partial maintenance anti-electric shock handcart provided by this utility model is used to maintain the stationary contact box on the busbar side or line side of the switchgear, it is not necessary to put the switchgear in a completely stopped state, thereby reducing the negative impact of the switchgear being completely stopped. Attached Figure Description

[0015] Figure 1 This is a side view of the switchgear partial maintenance electric shock protection handcart of this application.

[0016] Figure 2 This is a rear view of the switchgear partial maintenance electric shock protection handcart of this application.

[0017] Figure 3 This is a side view of the insulating protective component of this application.

[0018] Figure 4 This is a rear view of the insulating protective component of this application.

[0019] Figure 5 This is a side view of the insulating protective member when the insulating partition of this application is installed on the upper part.

[0020] Figure 6 This is a rear view of the insulating protective component when the insulating partition of this application is installed on the upper part.

[0021] Figure 7 This is a side view of the insulating protective member when the insulating partition of this application is installed at the bottom.

[0022] Figure 8 This is a rear view of the insulating protective member when the insulating partition of this application is installed at the bottom.

[0023] Figure 9 This is a side view of the switchgear partial maintenance anti-electric shock handcart of this application installed inside the switchgear.

[0024] In the diagram: 10, anti-electric shock handcart for partial maintenance of switchgear; 20, traction component; 21, traction frame; 22, traction pulley; 23, drive hole; 30, insulation protection component; 31, mounting bracket; 32, insulation partition; 33, sealing strip; 34, first arc-shaped slide groove; 35, second arc-shaped slide groove; 36, first locking groove; 37, second locking groove; 38, locking assembly; 381, first locking piece; 382, ​​first striking block; 383, second locking piece; 384, second striking block. Detailed Implementation

[0025] The technical solutions and effects of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0026] Please refer to Figure 1 This utility model provides a switchgear partial maintenance electric shock prevention handcart 10, including a traction component 20 and an insulation protection component 30. The bottom of the traction component 20 can be threadedly connected to the lead screw of the lead screw transmission mechanism inside the switchgear, so as to move to the working position or the isolation position under the drive of the lead screw transmission mechanism. The insulation protection component 30 includes a mounting frame 31, an insulating partition 32, a sealing strip 33, and a locking assembly 38. The mounting frame 31 is L-shaped, and its bottom surface is fixedly mounted on the traction component 20. The insulating partition 32 is detachably mounted on the upper or lower part of the side of the mounting frame 31, and is used to open the partition when the traction component 20 moves to the working position. The outer surface of the isolation baffle on the busbar side or line side of the switchgear is covered; the first end of the sealing strip 33 is fixedly installed in the middle of the mounting frame 31, and the second end extends from the mounting frame 31. When the traction member 20 moves to the working position, it extends between the stationary contact box on the busbar side and the stationary contact box on the line side of the switchgear to form a physical isolation barrier that separates the stationary contact box on the busbar side and the stationary contact box on the line side; the first end of the locking assembly 38 is detachably installed at the bottom of the mounting frame 31. When the traction member 20 moves to the working position, it presses the rocker arm linkage mechanism corresponding to the isolation baffle on the busbar side or line side of the switchgear, so that the isolation baffle on the busbar side or line side of the switchgear opens.

[0027] Thus, when inspecting the stationary contact box on the busbar side of the switchgear, the insulating partition 32 is installed at the lower part of the mounting bracket 31 and locked by the locking assembly 38. When the traction component 20 moves to the working position under the drive of the screw drive mechanism, the first end of the locking assembly 38 presses the rocker arm linkage mechanism corresponding to the isolation baffle on the busbar side inside the switchgear, causing the isolation baffle on the busbar side to open; the second end of the sealing strip 33 extends into the space between the stationary contact box on the busbar side and the stationary contact box on the line side to form a physical isolation barrier, thereby preventing operators from accessing the switchgear. Handheld metal tools can be inserted into or dropped into the stationary contact box on the line side through gaps in the isolation baffle. Simultaneously, the insulating partition 32 forms an additional insulating barrier on the outer surface of the isolation baffle on the line side. Even if the isolation baffle on the line side is punctured by high voltage, the insulating partition 32 can effectively block the discharge path, preventing the stationary contact box on the busbar side from accidentally becoming energized, thus preventing electric shock accidents. When inspecting the stationary contact box on the line side of the switchgear, the insulating partition 32 is installed on the upper part of the mounting bracket 31. The locking assembly 38 locks the device in place. When the traction component 20 moves to the working position under the drive of the screw drive mechanism, the first end of the locking assembly 38 presses against the rocker arm linkage mechanism corresponding to the isolation baffle on the line side inside the switch cabinet, causing the isolation baffle on the line side to open. The second end of the sealing strip 33 extends into the stationary contact box on the line side and the stationary contact box on the busbar side to form a physical isolation barrier, thereby preventing metal tools held by the operator from being inserted into or falling into the stationary contact box on the busbar side through the gap in the isolation baffle on the busbar side. At the same time, the insulation barrier... Plate 32 shields the outer surface of the isolation baffle on the busbar side, forming an additional insulating barrier on the isolation baffle. Even if the isolation baffle on the busbar side is broken down by high voltage, the insulating baffle 32 can effectively block the discharge path and prevent the stationary contact box on the line side from being accidentally energized, thereby preventing electric shock accidents. Therefore, when the switchgear partial maintenance anti-electric shock handcart 10 provided by this utility model is used to maintain the stationary contact box on the busbar side or line side of the switchgear, it is not necessary to put the switchgear in a completely stopped state, thereby reducing the negative impact caused by the complete shutdown of the switchgear.

[0028] Reduce grid operation risks and minimize unnecessary load losses.

[0029] Please refer to Figure 1 Furthermore, the traction component 20 includes a traction frame 21 and at least four traction pulleys 22. Each traction pulley 22 is rotatably mounted on the traction frame 21 and symmetrically distributed on both sides of the traction frame 21. The outer edge of each traction pulley 22 is rotatably mounted on the guide rail of the switchgear so that the traction frame 21 can slide along the guide rail of the switchgear.

[0030] Please refer to Figure 2Furthermore, the traction frame 21 has a drive hole 23, which is threadedly connected to the lead screw of the lead screw transmission mechanism of the switch cabinet, so that the traction frame 21 can slide along the guide rail of the switch cabinet under the drive of the lead screw transmission mechanism.

[0031] Please refer to Figure 3 and Figure 4 Furthermore, the top of the mounting bracket 31 is provided with a first arc-shaped groove 34, which is used to engage with the top of the insulating partition 32 when the insulating partition 32 is installed on the upper part of the mounting bracket 31; the bottom of the mounting bracket 31 is provided with a second arc-shaped groove 35, which is used to engage with the bottom of the insulating partition 32 when the insulating partition 32 is installed on the lower part of the mounting bracket 31.

[0032] Please refer to Figure 3 Furthermore, the mounting bracket 31 has a first locking groove 36 and a second locking groove 37 symmetrically opened on both sides with the sealing strip 33 as the axis of symmetry, and the first locking groove 36 is located above the second locking groove 37.

[0033] Furthermore, the second end of the locking assembly 38 is detachably inserted into the first locking groove 36 or the second locking groove 37 and engages with the lower or upper end of the insulating partition 32 in the installation position to lock the insulating partition 32 onto the mounting frame. Specifically, since the first arc-shaped slide groove 34 or the second arc-shaped slide groove 35 can only engage with the top or bottom of the insulating partition 32, in order to lock the insulating partition 32 onto the mounting frame 31, the second end of the locking assembly 38 is inserted into the first locking groove 36 or the second locking groove 37, so that the second end of the locking assembly 38 engages with the bottom or top of the insulating partition 32, thereby locking the insulating partition 32 onto the mounting frame 31.

[0034] Please refer to Figure 5 and Figure 6 When the stationary contact box on the line side of the switchgear is inspected and maintained, the interlocking assembly 38 includes two first locking members 381 and two first striking blocks 382. The first end of each first locking member 381 is detachably installed at the bottom of the mounting frame 31, and the second end is detachably inserted into the first locking groove 36. It is used to engage with the bottom of the insulating partition 32 when the insulating partition 32 is installed on the upper part of the mounting frame 31, thereby locking the insulating partition 32 on the mounting frame 31. Each first striking block 382 is fixedly installed on the side of the first end of a first locking member 381. It is used to press the corresponding rocker arm linkage mechanism on the switchgear when the traction member 20 moves to the working position, so as to open the isolation baffle on the line side of the switchgear.

[0035] Please refer to Figure 7 and Figure 8When the stationary contact box on the busbar side of the switchgear is inspected and maintained, the interlocking assembly 38 includes two second locking members 383 and two second striking blocks 384. The first end of each second locking member 383 is detachably installed at the bottom of the mounting frame 31, and the second end is detachably inserted into the second locking groove 37. It is used to engage with the upper part of the insulating partition 32 when the insulating partition 32 is installed at the lower part of the mounting frame 31, thereby locking the insulating partition 32 on the mounting frame 31. Each second striking block 384 is fixedly installed on the side of the first end of a second locking member 383. It is used to press the corresponding rocker arm linkage mechanism on the switchgear when the traction member 20 moves to the working position, so as to open the isolation baffle on the busbar side of the switchgear.

[0036] Please refer to Figure 5 and Figure 7 In this embodiment, the first end of the first locking member 381 and the first end of the second locking member 383 are provided with mounting holes, and the two sides of the bottom of the mounting bracket 31 are provided with fixing holes. Each mounting hole and the corresponding fixing hole are connected by bolts so that the first end of the first locking member 381 or the first end of the second locking member 383 can be detachably installed on the bottom of the mounting bracket 31.

[0037] In this embodiment, by setting two types of locking components 38, incorrect installation of the locking components 38 can be effectively prevented. Specifically, the second end of the first locking member 381 and the second end of the second locking member 383 are at different heights. This design ensures that the second end of the first locking member 381 can only be inserted into the first locking groove 36 to lock the insulating partition 32 installed on the upper part of the mounting frame 31; the second end of the second locking member 383 can only be inserted into the second locking groove 37 to lock the insulating partition 32 installed on the lower part of the mounting frame 31. This exclusive matching in physical structure fundamentally avoids operators from incorrectly installing the locking components 38, ensuring that the installation position of the insulating partition 32 strictly corresponds to the isolation baffle to be opened, effectively guaranteeing the safety and reliability of maintenance operations.

[0038] Example 1: Usage of the switchgear partial maintenance anti-electric shock handcart 10 Taking the busbar side stationary contact box of the switchgear as an example 1. De-energize the stationary contact box on the busbar side of the switchgear to be inspected, and remove the original trolley from the switchgear cabinet. 2. Extend the insulating partition 32 into the lower part of the mounting frame 31 at an angle from the side of the mounting frame 31 facing away from the isolation baffle, so that its bottom is engaged in the second arc-shaped groove 35 at the bottom of the mounting frame 31; 3. The first ends of the two second locking members 383 are detachably installed to the bottom of the mounting bracket 31 by bolts, and the second ends of the two second locking members 383 are respectively inserted into the second locking grooves 37 on both sides of the mounting bracket 31, so that the second ends of the second locking members 383 are engaged with the upper part of the insulating partition 32, and are firmly locked to the lower part of the mounting bracket 31. 4. Position the switch cabinet partial maintenance anti-electric shock handcart 10 in front of the switch cabinet, ensuring that the traction pulleys 22 on both sides of the traction frame 21 are aligned with the starting position of the preset guide rail inside the switch cabinet. At the same time, make the drive hole 23 on the traction frame 21 connected to the screw thread of the screw transmission mechanism installed inside the switch cabinet. 5. Insert the operating handle into the operating hole of the switch cabinet panel and connect it to the screw drive of the screw transmission mechanism installed inside the switch cabinet; 6. Rotate the crank handle in the predetermined direction to make the lead screw rotate, which will drive the traction frame 21, which is threadedly connected to the lead screw, to move along the lead screw to the working position; 7. During the movement, the second impact block 384 contacts and continuously presses the rocker arm linkage mechanism that is linked with the isolation baffle on the busbar side, causing the isolation baffle on the busbar side to open; 8. When the traction frame 21 moves to the working position, the second end of the sealing strip 33 extends into the gap between the busbar-side stationary contact box and the line-side stationary contact box, forming a physical isolation barrier; at this time, the busbar-side isolation baffle has been opened; the sealing strip 33 physically isolates the energized line-side area to prevent tools from accidentally entering; the insulating baffle 32 provides additional insulation protection for the line-side isolation baffle to prevent the risk of high-voltage breakdown due to aging; enabling personnel to perform maintenance on the busbar-side stationary contact box of the switchgear while the line-side stationary contact box of the switchgear remains energized.

[0039] 9. After the maintenance is completed, shake the crank handle in the opposite direction to the predetermined direction to rotate the lead screw, which will drive the traction frame 21, which is threadedly connected to the lead screw, to move along the lead screw to the isolation position; 10. During the movement, the blocking strip 33 exits from the gap between the stationary contact box on the busbar side and the stationary contact box on the line side, and the second impact block 384 separates from the rocker arm linkage mechanism that is linked with the isolation baffle on the busbar side. The isolation baffle on the busbar side automatically closes under the reset action of the rocker arm linkage mechanism. 11. After the handcart has been completely returned to the isolation position, proceed with the subsequent operations.

[0040] Taking the maintenance of the stationary contact box on the line side of the switchgear as an example The operation steps are the same as those for the busbar side of the switchgear, except that the insulating partition 32 is installed on the upper part of the side of the mounting bracket 31, and its top is inserted into the first arc-shaped sliding groove 34 on the top of the mounting bracket 31; a locking assembly 38 consisting of a first locking member 381 and a first striking block 382 is used. The first ends of the two first locking members 381 are detachably installed to the bottom of the mounting bracket 31 by bolts, and their second ends are respectively inserted into the first locking grooves 36 on both sides of the mounting bracket 31 and engaged with the bottom of the insulating partition 32; the first striking block 382 contacts and squeezes the rocker arm linkage mechanism linked with the isolation baffle on the line side during movement, so that the isolation baffle on the line side is opened.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A switchgear trolley for partial maintenance to prevent electric shock, characterized in that, The switchgear includes a traction component and an insulation protection component. The bottom of the traction component can be threadedly connected to the lead screw of a lead screw drive mechanism installed inside the switchgear, so as to move to the working position or the isolation position under the drive of the lead screw drive mechanism. The insulation protection component includes a mounting frame, an insulating partition, a sealing strip, and a locking assembly. The mounting frame is L-shaped, and its bottom surface is fixedly mounted on the traction component. The insulating partition is detachably mounted on the upper or lower part of the side of the mounting frame, and is used to block the outer surface of the isolation baffle on the busbar side or line side of the switchgear when the traction component moves to the working position. The sealing strip is used for shielding; the first end of the sealing strip is fixedly installed in the middle of the mounting frame, and the second end of the sealing strip extends from the mounting frame. When the traction component moves to the working position, it extends between the busbar side and the line side stationary contact box of the switchgear to form a physical isolation barrier that separates the busbar side stationary contact box and the line side stationary contact box; the first end of the locking component is detachably installed at the bottom of the mounting frame. When the traction component moves to the working position, it presses the rocker arm linkage mechanism corresponding to the isolation baffle on the busbar side or the line side of the switchgear, so that the isolation baffle on the busbar side or the line side of the switchgear opens.

2. The switchgear partial maintenance anti-electric shock handcart as described in claim 1, characterized in that, The traction component includes a traction frame and at least four traction pulleys. Each traction pulley is rotatably mounted on the traction frame and symmetrically distributed on both sides of the traction frame. The outer edge of each traction pulley is rotatably mounted on the guide rail of the switchgear so that the traction frame can slide along the guide rail of the switchgear.

3. The switchgear partial maintenance anti-electric shock handcart as described in claim 2, characterized in that, The traction frame has a drive hole, which is threadedly connected to the lead screw of the switch cabinet's lead screw transmission mechanism, so that the traction frame can slide along the guide rail of the switch cabinet under the drive of the lead screw transmission mechanism.

4. The switchgear partial maintenance anti-electric shock handcart as described in claim 3, characterized in that, The top of the mounting frame is provided with a first arc-shaped groove for engaging with the top of the insulating partition when the insulating partition is installed on the upper part of the mounting frame; the bottom of the mounting frame is provided with a second arc-shaped groove for engaging with the bottom of the insulating partition when the insulating partition is installed on the lower part of the mounting frame.

5. The switchgear partial maintenance anti-electric shock handcart as described in claim 4, characterized in that, The mounting bracket has a first locking groove and a second locking groove symmetrically opened on both sides with the sealing strip as the axis of symmetry, and the first locking groove is located above the second locking groove.

6. The switchgear partial maintenance anti-electric shock handcart as described in claim 5, characterized in that, The second end of the locking assembly extends detachably into the first or second locking groove and engages with the lower or upper end of the insulating partition in the installation position to lock the insulating partition onto the mounting bracket.

7. The switchgear partial maintenance anti-electric shock handcart as described in claim 6, characterized in that, The locking assembly includes two first locking members and two first striking blocks. The first end of each first locking member is detachably mounted on the bottom of the mounting frame, and the second end is detachably inserted into the first locking groove. This is used to engage with the bottom of the insulating partition when the insulating partition is installed on the upper part of the mounting frame, thereby locking the insulating partition on the mounting frame. Each first striking block is fixedly mounted on the side of the first end of a first locking member. This is used to press the corresponding rocker arm linkage mechanism on the switchgear when the traction member moves to the working position, thereby opening the isolation baffle on the line side of the switchgear.

8. The switchgear partial maintenance anti-electric shock handcart as described in claim 6, characterized in that, The locking assembly includes two second locking members and two second striking blocks. The first end of each second locking member is detachably mounted on the bottom of the mounting frame, and the second end is detachably inserted into the second locking groove. This is used to engage with the upper part of the insulating partition when the insulating partition is installed on the lower part of the mounting frame, thereby locking the insulating partition on the mounting frame. Each second striking block is fixedly mounted on the side of the first end of a second locking member. This is used to press the corresponding rocker arm linkage mechanism on the switchgear when the traction member moves to the working position, thereby opening the isolation baffle on the busbar side of the switchgear.

Images