A ground switch interlocking inspection tool for switch cabinet

Abstract

The application discloses a grounding switch interlocking inspection tool for a switch cabinet, which comprises a mechanism shell, two clamping bent plates, an unhooking assembly and a guide rod. A main shaft is movably arranged in the mechanism shell, one end of the main shaft penetrates through a compression spring, the mechanism shell is connected with a knob handle, the other end of the main shaft is connected with a fixed connecting plate, the two ends of the fixed connecting plate are respectively connected with the clamping bent plates through movable connecting plates, and the movable connecting plates are rotatably connected with the clamping bent plates and the fixed connecting plate. The guide rod is arranged in the mechanism shell, the unhooking assembly is connected to the bottom of the mechanism shell, and a protrusion is arranged on the main shaft and movably arranged in a cavity in the axial direction. A plurality of limiting grooves corresponding to the protrusion are arranged in the through hole in the circumferential direction. The protrusion is located in the limiting groove or separated from the limiting groove through axial movement of the main shaft, the unhooking assembly is inserted into the switch cabinet to make the rear interlocking trip, the knob handle is pulled and rotated, and the two clamping bent plates are driven to approach each other to form a locking state or move away from each other to form an unlocking state.

Description

Technical Field

[0001] This invention relates to the field of switchgear inspection technology, and specifically to a grounding switch interlocking inspection tool for switchgear. Background Technology

[0002] The current inspection method for switchgear is as follows: one person holds a screwdriver or other round bar and inserts it into the cabinet or presses against the lower rear door to release the rear interlock, and must maintain the current state; another person holds the operating handle in front of the cabinet and switches the grounding switch on and off to complete the inspection process.

[0003] Therefore, the current switchgear inspection work requires two people to complete, which results in low personnel utilization and low work efficiency. Furthermore, with the increase in labor costs, the inspection cost has also increased significantly. Summary of the Invention

[0004] To address the problem of low efficiency in existing switchgear testing, the present invention aims to provide a grounding switch interlock testing tool for switchgear. By inserting the unhooking component into the back of the switchgear, the rear interlock is released. Then, by pulling and rotating the knob handle, two clamping plates can be moved closer together to clamp the switchgear into a locked state or moved further apart to unlock and maintain the lock. The operation is simple and convenient, and only one person is needed to complete the switchgear inspection.

[0005] To achieve the above objectives, the present invention provides a grounding switch interlocking test tool for switchgear, comprising a mechanism housing, two clamping plates, a release assembly, and a guide rod.

[0006] The mechanism housing has a cavity inside, and a main shaft is installed in the cavity. One end of the main shaft passes through a compression spring. The mechanism housing is connected to a knob handle. The other end of the main shaft is threadedly connected to a fixed connecting plate. Both ends of the fixed connecting plate are connected to a clamping bending plate through movable connecting plates. The movable connecting plate is axially movable and circumferentially rotatable to both the clamping bending plate and the fixed connecting plate.

[0007] The mechanism housing has two clamping plates with coaxial through holes. A guide rod passes through the through holes of the two clamping plates in the mechanism housing. The unhooking assembly is threaded to the bottom of the mechanism housing.

[0008] The main shaft is provided with a protrusion, and the through hole is provided with a plurality of limiting grooves corresponding to the protrusion in the circumferential direction. The main shaft is axially movable in the cavity. The main shaft can move axially to make the protrusion be in or out of the limiting groove. When the protrusion is in the limiting groove, the main shaft cannot rotate circumferentially. When the protrusion is out of the limiting groove, the main shaft can rotate circumferentially.

[0009] By inserting the release assembly into the back of the switchgear, the rear interlock is released. Then, by pulling the knob handle upward, the main shaft can be driven to move axially upward against the spring force, causing the protrusion to move from the limiting groove to the outside. At this time, by rotating the knob handle in both directions, the main shaft, fixed connecting plate, and movable connecting plate can be driven to rotate in sequence. The two movable connecting plates pull the two clamping plates closer to each other and clamp the switchgear to form a locked state or further apart to form an unlocked state. By releasing the pulling force on the knob handle, the elastic restoring force of the spring drives the main shaft to move axially downward and causes the protrusion to move into the limiting groove. At this time, the main shaft cannot rotate circumferentially, and the two clamping plates can remain in the locked or unlocked state.

[0010] Furthermore, the housing cover is a rectangular box shape with one end open and the other end closed. The housing cover has a cavity inside, and connecting plates are symmetrically and vertically arranged on both sides of the open end for connecting with the unhooking assembly. The closed end of the housing cover has a through hole, and several limiting grooves are arranged around the through hole in sequence.

[0011] Furthermore, the main shaft is composed of a first cylindrical segment, a second cylindrical segment, and a third cylindrical segment that are coaxially distributed and connected in sequence, with the diameters of the first cylindrical segment, the second cylindrical segment, and the third cylindrical segment increasing sequentially.

[0012] The surface of the first cylindrical section is provided with external threads for threaded connection with the knob handle;

[0013] The second cylindrical section is symmetrically provided with two protrusions corresponding to the limiting groove. When the protrusions are inserted into the limiting groove, the main shaft cannot rotate in the circumferential direction. By pulling the knob handle, the protrusions are disengaged from the limiting groove, and the main shaft can rotate in the circumferential direction at this time.

[0014] The compression spring is sleeved on the second cylindrical section and is engaged between the protrusion and the third cylindrical section;

[0015] The third cylindrical segment has a threaded hole at the end furthest from the second cylindrical segment.

[0016] Furthermore, the fixed connecting plate has an opening in the middle, and connecting holes for connecting with the movable connecting plate are provided on both sides of the opening. The fixed connecting plate is sleeved and clamped on the spindle through the opening. The bottom of the spindle has a threaded hole. Bolts are passed through the opening on the fixed connecting plate in sequence and threadedly connected to the threaded hole of the spindle to fix the fixed connecting plate on the spindle.

[0017] Furthermore, the movable connecting plate is provided with a first mounting hole for connecting with the fixed connecting plate and a second mounting hole for connecting with the clamping bending plate. A second connecting plate is provided on the inward side of the clamping bending plate, and a third mounting hole is provided on the second connecting plate. One end of the movable connecting plate is coaxially arranged with the connecting hole of the fixed connecting plate through the first mounting hole, and the other end of the movable connecting plate is coaxially arranged with the third mounting hole on the second connecting plate of the clamping bending plate through the second mounting hole. A bushing is movably inserted into the first mounting hole, the connecting hole, the second mounting hole, and the third mounting hole, and a bolt is inserted into the bushing and connected with a nut to restrict one end of the movable connecting plate to the fixed connecting plate and the other end of the movable connecting plate to the clamping bending plate on the bushing.

[0018] Furthermore, the guide rod passes through the through hole on the housing cover, and grooves are provided at both ends of the guide rod. A retaining spring is placed in the groove, which is used to restrict the axial movement of the guide rod in the through hole.

[0019] Furthermore, the top of the clamping bent plate extends vertically toward the mechanism cover to form a first guide plate and a second guide plate, and both the first guide plate and the second guide plate are provided with long moving holes;

[0020] The closed end of the mechanism cover is provided with a second guide hole and a third guide hole corresponding to the first guide plate and the second guide plate.

[0021] A second bushing is installed in the long moving hole on the first guide plate and in the second guide hole, as well as in the long moving hole on the second guide hole and in the third guide hole. The second bushing can move along the long moving hole. The two ends of the second bushing are respectively threaded with a second bolt and a second nut to restrict the axial movement of the first guide plate and the second guide plate.

[0022] Furthermore, the unhooking assembly includes a base plate, a first connector, and a second connector;

[0023] The base plate is provided with connecting holes on both sides, and the base plate is threadedly connected to the connecting plate on the mechanism cover.

[0024] The base plate has an opening in the middle. The first connector is placed on the top of the base plate and is fixed by fasteners passing through the base plate in sequence. The second connector is placed in the opening and is fixed by fasteners passing through the first connector in sequence. The second connector can be inserted into the back of the switch cabinet to release the rear interlock.

[0025] The grounding switch interlocking test tool for switchgear provided by this invention releases the rear interlock by inserting the unhooking component into the back of the switchgear. Then, by pulling and rotating the knob handle, two clamping plates can be moved closer to each other to clamp the switchgear into a locked state or moved further apart to unlock and maintain the lock. The operation is simple and convenient, and only one person is needed to complete the switchgear inspection. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] Figure 1 A schematic diagram of the overall structure of the grounding switch interlocking test tool for switchgear provided by the present invention;

[0028] Figure 2 A first-view exploded structural diagram of the grounding switch interlocking test tool for switchgear provided by the present invention;

[0029] Figure 3 A second-view exploded structural diagram of the grounding switch interlocking test tool for switchgear provided by the present invention;

[0030] Figure 4 A schematic diagram of the main shaft in the grounding switch interlocking test tool for switchgear provided by the present invention;

[0031] Figure 5 A schematic diagram of the mechanism housing in the grounding switch interlocking test tool for switchgear provided by the present invention;

[0032] Figure 6 A schematic diagram of the through hole on the mechanism cover of the grounding switch interlocking test tool for switchgear provided by the present invention;

[0033] Figure 7 A side sectional view of the main shaft, compression spring, and knob handle connected to the mechanism housing in the grounding switch interlocking inspection tool for switchgear provided by the present invention.

[0034] Figure 8 A schematic diagram of the unhooking component in the grounding switch interlocking test tool for switchgear provided by the present invention.

[0035] Illustration:

[0036] Bushing 10, bolt 20, nut 30, second bushing 40, second bolt 50, second nut 60;

[0037] Mechanism housing 100, clamping bend plate 200, disengagement assembly 300, guide rod 400;

[0038] Connecting plate 101, through hole 102, limiting groove 102a, second guide hole 103, third guide hole 104, cavity 110, main shaft 120, first cylindrical section 121, second cylindrical section 122, protrusion 122a, third cylindrical section 123, compression spring 130, knob handle 140, fixed connecting plate 150, opening 151, connecting hole 152, movable connecting plate 160, first mounting hole 161, second mounting hole 162, second connecting plate 210, first guide plate 220, long moving hole 221, second guide plate 230, third mounting hole 211, groove 410, retaining spring 420. Detailed Implementation

[0039] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0040] See Figures 1-3 The diagram shown is a structural schematic of the grounding switch interlocking test tool for switchgear provided by the present invention.

[0041] As shown in the figure, the grounding switch interlocking test tool for switchgear provided by the present invention includes four components: a mechanism housing 100, two clamping bent plates 200, a release assembly 300, and a guide rod 400.

[0042] The mechanism housing 100 has a cavity 110 inside, and a main shaft 120 is installed in the cavity 110. The mechanism housing 100 has a through hole 102 that allows the main shaft 120 to pass through. One end of the main shaft 120 passes through a compression spring 130. The through hole 102 on the mechanism housing 100 is connected to a knob handle 140. The other end of the main shaft 120 is threadedly connected to a fixed connecting plate 150. Both ends of the fixed connecting plate 150 are connected to a clamping bent plate 200 through movable connecting plates 160. The movable connecting plate 160 is axially movable and circumferentially rotatable to both the clamping bent plate 200 and the fixed connecting plate 150.

[0043] The mechanism cover 100 and the two clamping bent plates 200 are both provided with through holes on the same axis. The guide rod 400 passes through the through holes of the mechanism cover 100 and the two clamping bent plates 200. The unhooking assembly 300 is threadedly connected to the bottom of the mechanism cover 100.

[0044] The main shaft 120 is provided with a protrusion 122a, and the through hole 102 is provided with a plurality of limiting grooves 102a corresponding to the protrusion 122a in the circumferential direction. The main shaft 120 is axially movable in the cavity 110. The main shaft 120 can move axially so that the protrusion 122a is located in or out of the limiting groove 102a. When the protrusion 122a is located in the limiting groove 102a, the main shaft 120 cannot rotate circumferentially. When the protrusion 122a is out of the limiting groove 102a, the main shaft 120 can rotate circumferentially.

[0045] By inserting the release assembly 300 into the back of the switch cabinet, the rear interlock is released. Then, by pulling the knob handle 140 upward, the main shaft 120 can be driven to move axially upward against the elastic force of the compression spring 130, and the protrusion 122a can be moved from the limiting groove 102a to the outside. At this time, by rotating the knob handle 140 in both directions, the main shaft 120, the fixed connecting plate 130, and the movable connecting plate 140 can be driven to rotate in sequence. The two movable connecting plates 140 respectively pull the two clamping bent plates 200 closer to each other and clamp the switch cabinet to form a locked state or to move away from each other to form an unlocked state. By releasing the pulling force on the knob handle 140, the elastic restoring force of the compression spring 130 drives the main shaft 120 to move axially downward and the protrusion 122a to move into the limiting groove 102a. At this time, the main shaft 120 cannot rotate circumferentially, and the two clamping bent plates 200 can maintain the locked state or the unlocked state.

[0046] Specifically, such as Figure 5 The housing cover 100 is a rectangular box shape with one end open and the other end closed. The housing cover 100 has a cavity 110 inside. Connecting plates 101 are symmetrically and vertically arranged on both sides of the open end for connecting with the unhooking assembly 300.

[0047] The closed end of the housing cover 100 is provided with a through hole 102, which is connected to the cavity 110 and allows the main shaft 120 to pass through. The through hole 102 is provided with a number of limiting grooves 102a in sequence around its circumference.

[0048] In conjunction with, such as Figure 4 The main shaft 120 is composed of a first cylindrical segment 121, a second cylindrical segment 122, and a third cylindrical segment 123 that are coaxially distributed and connected in sequence, and the diameters of the first cylindrical segment 121, the second cylindrical segment 122, and the third cylindrical segment 123 increase sequentially.

[0049] The surface of the first cylindrical section 121 is provided with external threads for threaded connection with the knob handle 140;

[0050] Two protrusions 122a are symmetrically arranged on the second cylindrical section 122, corresponding to the limiting groove 102a. When the protrusions 122a are inserted into the limiting groove 102a, the main shaft 120 cannot rotate in the circumferential direction. By pulling the knob handle 140, the protrusions 122a are disengaged from the limiting groove 102a, and the main shaft 120 can rotate in the circumferential direction.

[0051] The compression spring 130 is sleeved on the second cylindrical section 122 and is locked between the protrusion 122a and the third cylindrical section 123;

[0052] The third cylindrical segment 123 has a threaded hole at the end away from the second cylindrical segment 122.

[0053] Furthermore, the diameter of the knob handle 140 is larger than that of the through hole 102, and the contact between the knob handle 140 and the through hole 102 can limit the movement of the spindle 120 toward the disengagement assembly 300.

[0054] The spindle 120, with this structure, mates with the housing cover 100. The spindle 120 is located in the cavity 110. The spindle 120 passes through the through hole 102, allowing the first cylindrical section 121 to be threadedly connected to the knob handle 140. In the stationary state, due to the elasticity of the compression spring 130, the protrusion 122a on the spindle 120 is recessed into the limiting groove 102a on the housing cover 100. Simultaneously, due to the obstruction of the knob handle 140, the elasticity of the compression spring 130 is restrained, causing the spindle 120 to... When the tool is in a stationary state, pull the knob handle 140 upward to pull the spindle 120 and overcome the elasticity of the upper compression spring 130, so that the protrusion 122a of the spindle 120 disengages from the limiting groove 120a on the mechanism housing 100. After the knob handle 140 is rotated to the position, release the knob handle 140. Due to the elasticity of the compression spring 130, the protrusion 122a on the spindle 120 will fall back into the limiting groove 102a on the mechanism housing 100, and the mechanism returns to a stationary state.

[0055] Furthermore, the fixed connecting plate 150 has an opening 151 in the middle, and connecting holes 152 on both sides of the opening 151 for connecting with the movable connecting plate 160. The fixed connecting plate 150 is sleeved and clamped on the third cylindrical section 123 of the spindle 120 through the opening 151. Bolts are passed through the opening 151 on the fixed connecting plate 150 and threadedly connected to the threaded holes of the third cylindrical section 123 to fix the fixed connecting plate 150 on the spindle 120.

[0056] The fixed connecting plate 150 and the movable connecting plate 160 are connected in this configuration. The movable connecting plate 160 is provided with a first mounting hole 161 for connecting with the fixed connecting plate 150 and a second mounting hole 162 for connecting with the clamping bent plate 200. A second connecting plate 210 is provided on the inward side of the clamping bent plate 200, and a third mounting hole 211 is provided on the second connecting plate 210. One end of the movable connecting plate 160 is coaxially arranged with the connecting hole 152 of the fixed connecting plate 150 through the first mounting hole 161, thus enabling the movable connection. The other end of 160 is coaxially arranged with the third mounting hole 211 on the second connecting plate 210 on the clamping bending plate 200 through the second mounting hole 162. A bushing 10 is movably inserted through the first mounting hole 161 and the connecting hole 152, as well as the second mounting hole 162 and the third mounting hole 211. A bolt 20 is inserted through the bushing 10 and connected with a nut 30 to restrict one end of the movable connection 160 and the fixed connecting plate 150, and the other end of the movable connecting plate 160 and the clamping bending plate 200 to the bushing 10 to prevent them from falling off.

[0057] The guide rod 400 passes through the through hole on the housing cover 100. The guide rod 400 has grooves 410 at both ends, and a retaining spring 420 is installed in the groove. The retaining spring 420 is used to restrict the axial movement of the guide rod 400 in the through hole.

[0058] Furthermore, in order to improve the reliability of the clamping bent plate 200 when it moves, the top of the clamping bent plate 200 extends vertically toward the mechanism cover 100 to form a first guide plate 220 and a second guide plate 230. Both the first guide plate 220 and the second guide plate 230 are provided with long moving holes 221.

[0059] The closed end of the mechanism cover 100 is provided with a second guide hole 103 and a third guide hole 104 corresponding to the first guide plate 220 and the second guide plate 230.

[0060] Second bushings 40 are provided in the elongated moving hole 221 on the first guide plate 220 and in the second guide hole 103, as well as in the elongated moving hole 221 on the second guide hole 120 and in the third guide hole 104. The second bushings 40 can move along the elongated moving hole 221. The two ends of the second bushings 40 are respectively threadedly engaged by the second bolts 50 and the second nuts 60 to restrict the axial movement of the first guide plate 220 and the second guide plate 230.

[0061] like Figure 8 The unhooking assembly 300 includes a base plate 310, a first connector 320, and a second connector 330;

[0062] The base plate 310 has connecting holes on both sides, and the base plate 310 is threadedly connected to the connecting plate 101 on the mechanism cover 100.

[0063] The base plate 310 has an opening in the middle. The first connector 320 is placed on the top of the base plate 310 and is fixed by fasteners passing through the base plate 310 in sequence. The second connector 330 is placed in the opening and is fixed by fasteners passing through the first connector 320 in sequence.

[0064] The function of the release assembly 300 is to cooperate with the rear interlock of the switchgear to release the rear interlock. The base plate 310 is used to connect the first connector 320 and the second connector 330. The second connector 330 is a standard matching part for the rear interlock on the switchgear at present. The second connector 330 can be inserted into the rear of the switchgear to release the rear interlock. It is mainly used to check the reliability of the rear interlock on the switchgear and whether it meets the requirements.

[0065] Then, through the cooperation of the knob handle 140, the main shaft 120 and the two clamping plates 200, the clamping plates 200 can be locked or unlocked with the switch cabinet, so that no personnel need to operate it behind the cabinet.

[0066] The following examples illustrate the working process of this invention in a specific application. It should be noted that the content described here is only a specific application example of this solution and does not constitute a limitation on this solution.

[0067] The inspection begins by inserting the second connector 330 on the release assembly 300 into the rear of the switchgear cabinet to release the rear interlock and fix it to the rear of the switchgear cabinet to ensure that the rear interlock is maintained.

[0068] At this point, pulling the knob handle 140 outward will drive the main shaft 120, which in turn drives the fixed connecting plate 150 fixed to the main shaft 120, compressing the spring 130 and pulling it out by about 3mm. At this point, the protrusion 120a on the main shaft 120 will disengage from the limiting groove 102a and expose the mechanism cover 110, achieving circumferential rotation. Then, rotating the knob handle 140 clockwise will drive the main shaft 120 to rotate, causing the fixed connecting plate 150 to rotate, pulling the two movable connecting plates 160, and pulling the two clamping bent plates 200 inward. Clamp and continue to rotate the knob handle 140 clockwise until the clamping plate 200 locks with the switch cabinet. Then release the knob handle 140. Under the action of the compression spring 130, the protrusion 120a on the main shaft 120 enters the limiting groove 102a and is located inside the mechanism cover 110. The compression spring 130 returns to its original position, and the knob handle 140 and the main shaft 120 are circumferentially locked. This inspection tool is self-locking on the switch cabinet to ensure the maintenance of the rear interlocking trip state. At this time, the grounding switch inspection work can be carried out on the switch cabinet.

[0069] After the inspection is completed, pull the knob handle 140 outward to drive the main shaft 120, which in turn drives the fixed connecting plate 150 fixed to the main shaft 120, compressing the spring 130. Pull out about 3mm. At this time, the protrusion 120a on the main shaft 120 is exposed in the mechanism cover 110, allowing circumferential rotation. Rotate the knob handle 140 counterclockwise to drive the main shaft 120 to rotate, which in turn drives the fixed connecting plate 150 to rotate, pushing the two movable connecting plates 160 and pushing the two clamping bent plates 200 outward. Continue to rotate the knob handle 140 counterclockwise until the two clamping bent plates 200 are released from the switch cabinet. Release the knob handle 140. Under the action of the spring 130, the protrusion 120a on the main shaft 120 is inserted into the mechanism cover 110, the spring 130 returns to its original position, and the knob handle 140 and the main shaft 120 are circumferentially locked. At this time, this inspection tool can be removed from the switch cabinet.

[0070] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A ground switch interlocking verification tool for a switchgear, characterized by, The mechanism shell cover is internally provided with a cavity, the cavity is provided with a main shaft, one end of the main shaft penetrates through a compression spring, the mechanism shell cover is connected with a knob handle, the other end of the main shaft is threadedly connected with a fixed connecting plate, the two ends of the fixed connecting plate are respectively connected with clamping bent plates through movable connecting plates, the movable connecting plates are axially movable and circumferentially rotatable with the clamping bent plates and the fixed connecting plate. The mechanism shell cover is internally provided with a cavity, the cavity is provided with a main shaft, one end of the main shaft penetrates through a compression spring, the mechanism shell cover is connected with a knob handle, the other end of the main shaft is threadedly connected with a fixed connecting plate, the two ends of the fixed connecting plate are respectively connected with clamping bent plates through movable connecting plates, the movable connecting plates are axially movable and circumferentially rotatable with the clamping bent plates and the fixed connecting plate. The mechanism shell cover is internally provided with a cavity, the cavity is provided with a main shaft, one end of the main shaft penetrates through a compression spring, the mechanism shell cover is connected with a knob handle, the other end of the main shaft is threadedly connected with a fixed connecting plate, the two ends of the fixed connecting plate are respectively connected with clamping bent plates through movable connecting plates, the movable connecting plates are axially movable and circumferentially rotatable with the clamping bent plates and the fixed connecting plate. The main shaft is axially movable in the cavity, the main shaft can be axially moved to make the protrusion located in the limiting slot or separated from the limiting slot, when the protrusion is located in the limiting slot, the main shaft is circumferentially immovable, when the protrusion is separated from the limiting slot, the main shaft is circumferentially movable. The mechanism shell cover is internally provided with a cavity, the cavity is provided with a main shaft, one end of the main shaft penetrates through a compression spring, the mechanism shell cover is connected with a knob handle, the other end of the main shaft is threadedly connected with a fixed connecting plate, the two ends of the fixed connecting plate are respectively connected with clamping bent plates through movable connecting plates, the movable connecting plates are axially movable and circumferentially rotatable with the clamping bent plates and the fixed connecting plate.

2. The grounding switch interlocking verification tool for a switchgear according to claim 1, characterized by, The mechanism shell cover is internally provided with a cavity, the cavity is provided with a main shaft, one end of the main shaft penetrates through a compression spring, the mechanism shell cover is connected with a knob handle, the other end of the main shaft is threadedly connected with a fixed connecting plate, the two ends of the fixed connecting plate are respectively connected with clamping bent plates through movable connecting plates, the movable connecting plates are axially movable and circumferentially rotatable with the clamping bent plates and the fixed connecting plate.

3. The grounding switch interlocking verification tool for a switchgear according to claim 1, characterized by, The mechanism shell cover is internally provided with a cavity, the cavity is provided with a main shaft, one end of the main shaft penetrates through a compression spring, the mechanism shell cover is connected with a knob handle, the other end of the main shaft is threadedly connected with a fixed connecting plate, the two ends of the fixed connecting plate are respectively connected with clamping bent plates through movable connecting plates, the movable connecting plates are axially movable and circumferentially rotatable with the clamping bent plates and the fixed connecting plate. The mechanism shell cover is internally provided with a cavity, the cavity is provided with a main shaft, one end of the main shaft penetrates through a compression spring, the mechanism shell cover is connected with a knob handle, the other end of the main shaft is threadedly connected with a fixed connecting plate, the two ends of the fixed connecting plate are respectively connected with clamping bent plates through movable connecting plates, the movable connecting plates are axially movable and circumferentially rotatable with the clamping bent plates and the fixed connecting plate. The mechanism shell cover is internally provided with a cavity, the cavity is provided with a main shaft, one end of the main shaft penetrates through a compression spring, the mechanism shell cover is connected with a knob handle, the other end of the main shaft is threadedly connected with a fixed connecting plate, the two ends of the fixed connecting plate are respectively connected with clamping bent plates through movable connecting plates, the movable connecting plates are axially movable and circumferentially rotatable with the clamping bent plates and the fixed connecting plate. ​ ​ 4. The grounding switch interlocking verification tool for a switchgear according to claim 1, characterized by, ​ 5. The grounding switch interlocking verification tool for a switchgear according to claim 1, characterized by, The movable connecting plate is provided with a first mounting hole for connecting with the fixed connecting plate and a second mounting hole for connecting with the clamping bent plate. The clamping bent plate is provided with a second connecting plate on the inward side. The second connecting plate is provided with a third mounting hole. One end of the movable connecting plate is coaxially arranged with the connecting hole of the fixed connecting plate through the first mounting hole. The other end of the movable connecting plate is coaxially arranged with the third mounting hole of the second connecting plate of the clamping bent plate through the second mounting hole. The first mounting hole and the connecting hole and the second mounting hole and the third mounting hole are movably provided with shaft sleeves. Bolts are arranged in the shaft sleeves and connected with nuts to limit the one end of the movable connecting plate with the fixed connecting plate and the other end of the movable connecting plate with the clamping bent plate in the shaft sleeves.

6. The grounding switch interlocking verification tool for a switchgear according to claim 1, characterized by, The guide rod is arranged in the through hole of the mechanism shell cover. The guide rod is provided with a groove at both ends. The groove is provided with a clamping spring. The clamping spring is used to limit the axial movement of the guide rod in the through hole.

7. The grounding switch interlocking verification tool for a switchgear according to claim 1, characterized by, The clamping bent plate is vertically extended to form a first guide plate and a second guide plate at the top thereof. The first guide plate and the second guide plate are provided with long moving holes. The mechanism shell cover is provided with a second guide hole and a third guide hole corresponding to the first guide plate and the second guide plate at the closed end thereof. The long moving holes of the first guide plate and the second guide hole and the long moving holes of the second guide hole and the third guide hole are provided with second shaft sleeves. The second shaft sleeves can move along the long moving holes. The second shaft sleeves are threadedly connected with second bolts and second nuts at both ends to limit the axial movement of the first guide plate and the second guide plate.

8. The grounding switch interlocking verification tool for a switchgear according to claim 2, characterized by, The unhooking assembly comprises a bottom plate, a first connecting piece and a second connecting piece. The bottom plate is provided with connecting holes at both sides. The bottom plate is threadedly connected with the connecting plate of the mechanism shell cover. The bottom plate is provided with an opening in the middle. The first connecting piece is arranged on the top of the bottom plate and is fixed with the bottom plate through fasteners. The second connecting piece is arranged in the opening and is fixed with the first connecting piece through fasteners. The second connecting piece can be inserted into the back of the switch cabinet to release the back interlocking trip.

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