A switch cabinet grounding switch interlocking device and method

Abstract

The application belongs to the technical field of grounding switches, and particularly relates to a switch cabinet grounding switch interlocking device. The device comprises a cabinet body, a mounting frame fixedly arranged in the cabinet body, a plurality of insulating columns uniformly and fixedly arranged on the mounting frame, and a wiring board fixedly connected to the insulating columns. One end of the wiring board is connected to a disconnecting switch through an electric wire, and the other end of the wiring board is movably connected to a knife switch mechanism, which is connected to a grounding wire through an electric wire. An interlocking mechanism is slidably connected to one side of the cabinet body, and a cabinet door is hingedly connected to the cabinet body. The device can quickly realize the interlocking on-off of the grounding switch by opening or closing the cabinet door, and can realize the quick on-off of the grounding switch without being affected by the interlocking mechanism. The device can limit and fix the cabinet door when the cabinet door is opened, and can avoid the problem of untimely connection of the grounding switch when the cabinet door is opened. In addition, the device can avoid the problem of cabinet door jamming.

Description

Technical Field

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

[0002] A grounding switch in a switchgear cabinet is a safety switching device used in power distribution systems. Its main function is to safely and reliably ground electrical equipment during maintenance. This switch connects the electrical equipment to the earth after the power supply is disconnected, ensuring protection against accidental voltage during maintenance, reducing the risk of electric shock, and providing a safe discharge path for the equipment. Grounding switches in switchgear cabinets must ensure safe and reliable operation. They play a crucial role in the maintenance and troubleshooting of power systems, helping to ensure the safety of operators and the normal operation of equipment.

[0003] Chinese Patent Application No. 202411200557.X discloses an interlocking system for a grounding switch in an electrical cabinet. The system includes an electrical cabinet with a grounding switch inside. Ejection mechanisms are located on both sides of the grounding switch. A locking mechanism is fixedly connected to the inner surface of the cabinet door. The copper rod of the grounding switch is rotatably connected to the cabinet body. This interlocking system, with its ejection mechanism, reduces the risk of operators coming into contact with potential hazards, especially in emergency shutdowns or maintenance situations. It allows for quick remote control of the door opening, improving personnel safety. It also simplifies the operation process, eliminating the need for manual opening, making it particularly suitable for large or heavy electrical cabinet doors and reducing manual labor. The locking mechanism prevents direct contact with the cabinet body, improving operator safety, overall equipment reliability and lifespan, and enabling rapid door locking, saving time and increasing operational efficiency.

[0004] The typical setup of grounding switch interlocking devices in switchgear requires switching the grounding switch on and off first, and then opening and closing the cabinet door. This operation is cumbersome, and the order may sometimes be forgotten during operation, which is not conducive to operation. At the same time, some interlocking devices have complex linkage designs that make it impossible to manually control the grounding switch individually. This can lead to problems such as the inability to control the grounding switch in emergencies due to interlock device failures. Furthermore, improving the stability of grounding switch connection operations is also one of the key research focuses. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a grounding switch interlocking device for switchgear. This invention allows for rapid interlocking of the grounding switch by opening or closing the cabinet door, improving operational convenience. Furthermore, in emergency situations, it enables rapid grounding switch operation without opening or closing the cabinet door, unaffected by the interlocking mechanism, thus facilitating emergency response. This invention not only limits and fixes the cabinet door when it is open, maintaining a continuous connection, but also prevents the grounding switch from failing to connect promptly when the door is opened. It also avoids the problem of the cabinet door jamming. This invention comprehensively improves the connection stability of the grounding switch during device operation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A grounding switch interlocking device for a switchgear includes a cabinet. An installation frame is fixedly mounted inside the cabinet, and multiple insulating posts are evenly fixedly mounted on the installation frame. A terminal block is fixedly connected to each insulating post. One end of the terminal block is connected to a disconnecting switch via a wire, and the other end of the terminal block is movably connected to a knife switch mechanism, which is connected to a grounding wire via a wire. An interlocking mechanism is slidably connected to one side of the cabinet's interior. A cabinet door is hinged to the cabinet, and the interlocking mechanism movably abuts against the cabinet door.

[0008] Furthermore, a support frame is fixedly provided on one side of the mounting frame, and the insulating column is fixedly installed on the support frame; multiple mounting slots are fixedly provided on the other side of the mounting frame, and the mounting slots correspond one-to-one with the insulating columns;

[0009] The knife switch mechanism includes a conductive rod, on which multiple knife switches are uniformly fixedly connected. One end of the conductive rod is connected to a grounding wire. One end of the knife switch is provided with a connection slot. A long strip terminal is fixedly provided at the bottom of one end of the terminal block. The long strip terminal corresponds one-to-one with the connection slot.

[0010] A pair of ear plates are symmetrically extended from one end of the mounting slot, and each ear plate on the mounting slot is rotatably connected to a rotating rod; the knife switch is fixedly connected to the rotating rod at one end away from the connecting slot.

[0011] Furthermore, one end of the mounting slot is rotatably connected to a first rotating shaft, and the two ends of the first rotating shaft are fixedly provided with first limiting discs; multiple sets of positioning plates are fixedly connected to the rotating rod, and the knife switch is located between a corresponding set of positioning plates; a second rotating shaft is rotatably connected to each set of positioning plates; and a second limiting disc is fixedly provided at both ends of the second rotating shaft.

[0012] An auxiliary spring is also provided on the mounting groove. Rotating blocks are fixed at both ends of the auxiliary spring, and the rotating blocks at both ends of the auxiliary spring are rotatably connected to the first rotating shaft and the second rotating shaft, respectively.

[0013] Furthermore, the cabinet has rotating holes on both sides, and the two ends of the rotating rod pass through the corresponding rotating holes and are rotatably connected to the rotating holes; the two ends of the rotating rod are fixedly provided with limiting blocks, which limit the rotation rod.

[0014] Furthermore, the interlocking mechanism includes a transmission plate, on which two slide rods are fixedly connected. Two sliding holes are opened through one side of the cabinet. The slide rods pass through the corresponding sliding holes, and the ends of the two slide rods are fixedly connected to a push plate. A return spring is sleeved on the slide rod, and the two ends of the return spring are fixedly connected to the cabinet and the transmission plate, respectively.

[0015] The push plate has a second threaded opening, and a locking rod is provided on the second threaded opening. The locking rod includes a rod body, which has threads and is screwed to the second threaded opening. A knob is fixedly provided at one end of the rod body, and a locking strip is fixedly provided at the other end of the rod body. A second through hole is provided on one side of the cabinet, and a long groove is provided on the second through hole. The shape of the long groove is the same as that of the locking strip.

[0016] Furthermore, one end of the transmission plate is provided with a threaded hole, and the rotating rod located on one side of the mounting bracket is provided with an external thread, and the threaded hole and the external thread are threadedly connected.

[0017] Furthermore, a limiting mechanism is installed on the transmission plate at the end away from the threaded hole. The limiting mechanism includes a limiting plate, and two second sliding rods are fixedly connected to one side of the limiting plate. A slot is opened at the end of the transmission plate away from the threaded hole, and a stop block is fixedly installed on the slot. A through hole is opened on the stop block, and a second sliding hole is opened at the bottom of the slot. The second sliding rod passes through the through hole of the stop block and is slidably connected to the second sliding hole. A second return spring is sleeved on the second sliding rod located between the bottom of the slot and the stop block. The two ends of the second return spring are fixedly connected to the second sliding rod and the stop block, respectively.

[0018] Furthermore, a second sliding groove is provided on each of the transmission plates located on both sides of the groove. A third sliding rod is fixedly provided on the second sliding groove. Two sliders are slidably connected to the third sliding rod. The two sliders are fixedly connected to a triangular limiting plate. A third return spring is sleeved on the third sliding rod. The two ends of the third return spring are fixedly connected to the slider and the second sliding groove, respectively.

[0019] A toggle plate is fixedly installed on the cabinet door, and the toggle plate is perpendicular to the cabinet door. When the cabinet door is closed, the end of the limit plate abuts against the toggle plate, and at this time the connecting slot of the knife switch is disconnected from the elongated terminal. When the cabinet door is opened, the toggle plate is engaged between the transmission plate and the limit plate, and at this time the connecting slot of the knife switch is inserted into the elongated terminal.

[0020] Furthermore, a control panel is installed on the cabinet door.

[0021] This invention also claims a method for operating the above-mentioned switchgear grounding switch interlocking device, comprising the following steps:

[0022] S1. When the cabinet door is opened, the actuating plate turns, and the end of the actuating plate first acts on the triangular limit plate, and then quickly moves the transmission plate, causing the slide rod to slide on the sliding hole; the displacement of the transmission plate drives the rotating rod to rotate, thereby quickly connecting the knife switch's connecting slot with the long strip terminal. At this time, the actuating plate passes over the triangular limit plate and is locked between the transmission plate and the limit plate.

[0023] S2. When the cabinet door is closed, the toggle plate turns in the opposite direction. It first presses against the triangular limit plate to compress the third reset spring. When the toggle plate passes the triangular limit plate, both the triangular limit plate and the limit plate reset. At this time, under the reset action of the reset spring, the transmission plate moves in the opposite direction, which in turn drives the rotating rod to rotate in the opposite direction, causing the knife switch connection slot to disconnect from the long strip terminal.

[0024] S3. When controlling the grounding switch without opening the cabinet door, push the push plate to displace the transmission plate and drive the rotating rod to rotate, so that the connection slot of the knife switch can be inserted into the long strip terminal. Then rotate the knob to make the locking strip misalign with the long slot. Finally, release the push plate to make the locking strip abut against the cabinet. When it is necessary to disconnect the connection slot of the knife switch from the long strip terminal, rotate the knob to release the locking strip from the abutment limit. Then, under the reset action of the reset spring, the connection slot of the knife switch is disconnected from the long strip terminal.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) This invention, through the cooperation of the knife switch mechanism and the interlocking mechanism, enables the grounding switch to be quickly switched on and off by opening or closing the cabinet door, thereby improving operational convenience. Furthermore, in emergency situations, the grounding switch can be quickly switched on and off without opening or closing the cabinet door, unaffected by the interlocking mechanism, thus enabling emergency handling. Specifically, when the cabinet door is opened, the actuating plate rotates to move the transmission plate, causing the slide rod to slide on the sliding hole. Due to the threaded connection between the threaded hole and the external thread, the displacement of the transmission plate can drive the rotating rod to rotate, thereby connecting the knife switch's connecting slot to the elongated terminal to achieve grounding switch connection. When the cabinet door is closed, the actuating plate rotates in the opposite direction. At this time, under the reset action of the return spring, the transmission rod... The moving plate moves in the opposite direction, causing the rotating rod to rotate in the opposite direction, thus disconnecting the connection slot of the knife switch from the elongated terminal and disconnecting the grounding switch. Furthermore, in an emergency, without opening or closing the cabinet door, first push the push plate to move the transmission plate and rotate the rotating rod, allowing the connection slot of the knife switch to engage with the elongated terminal. Then rotate the knob to misalign the locking strip with the slot. Finally, release the push plate, and the locking strip is locked against the cabinet by the reset spring. When it is necessary to disconnect the connection slot of the knife switch from the elongated terminal, rotate the knob to release the locking strip from its limit position, and then the connection slot of the knife switch is disconnected from the elongated terminal by the reset spring, thus achieving emergency handling.

[0027] (2) Through the structural design of the limiting mechanism, this invention can limit and fix the cabinet door when it is opened, thus facilitating the maintenance of a connected state; at the same time, it can also assist in quickly connecting the connection slot of the knife switch with the elongated terminal, thereby avoiding the problem of the grounding switch not connecting in time when the cabinet door is opened; and it also avoids the problem of the cabinet door jamming. Specifically, when the cabinet door is opened, the end of the actuating plate first acts on the triangular limiting plate. Due to the limiting and blocking effect of the triangular limiting plate, the actuating plate quickly moves the transmission plate in advance, thereby quickly causing the knife switch to... The connecting slot is plugged into the long strip terminal to avoid the problem of the grounding switch not connecting in time when the cabinet door is opened; at the same time, after the cabinet door is opened, the actuating plate is engaged between the transmission plate and the limiting plate. The abutment of the actuating plate and the clamping action of the limiting plate and the transmission plate limit and fix the cabinet door, thus facilitating the maintenance of the connection state; at the same time, through the cooperation of the triangular limiting plate and the third return spring, the cabinet door can drive the triangular limiting plate to compress the third return spring to move when it is closed, thereby preventing the cabinet door from being blocked by the limiting mechanism and causing it to jam when closed.

[0028] (3) By connecting the knife switch with the long strip terminal, the connection slot of the knife switch can be connected to the long strip terminal within a large range under the length setting of the long strip terminal, thus ensuring the continuity and fault tolerance; avoiding the problem of unstable grounding switch connection caused by the rebound when the limit mechanism and the toggle plate abut against each other when the cabinet door is opened and closed; and also avoiding the problem of unstable grounding switch connection caused by different applied forces when manually controlling the push plate and locking rod, thus comprehensively improving the connection stability of the grounding switch during device operation. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a grounding switch interlocking device for a switchgear according to the present invention;

[0030] Figure 2 This is a schematic diagram of the distributed structure of a grounding switch interlocking device for a switchgear according to the present invention;

[0031] Figure 3 This is a partial structural diagram of a grounding switch interlocking device for a switchgear according to the present invention. Figure 1 ;

[0032] Figure 4 This is a partial structural diagram of a grounding switch interlocking device for a switchgear according to the present invention. Figure 1 ;

[0033] Figure 5 This is a schematic diagram of a partially distributed structure of a grounding switch interlocking device for a switchgear according to the present invention. Figure 2 ;

[0034] Figure 6 This is a partial structural diagram of a grounding switch interlocking device for a switchgear according to the present invention. Figure 2 ;

[0035] Figure 7 This is a schematic diagram of a partially distributed structure of a grounding switch interlocking device for a switchgear according to the present invention. Figure 3 ;

[0036] Figure 8 This is a schematic diagram of a partially distributed structure of a grounding switch interlocking device for a switchgear according to the present invention. Figure 4 .

[0037] The attached figures are labeled as follows:

[0038] Cabinet body - 100; Cabinet door - 110; Control panel - 120; Rotating hole - 130; Sliding hole - 140; Second through hole - 150; Long slot - 151; Actuating plate - 160; Mounting bracket - 200; Support bracket - 210; Mounting slot - 220; Ear plate - 230; Insulating column - 300; Knife switch mechanism - 400; Conductive rod - 410; Knife switch - 420; Connecting slot - 421; Rotating rod - 430; External thread - 431; Limiting block - 432; Positioning plate - 440; Second rotating shaft - 450; Second limiting plate - 451; First rotating shaft - 460; First limiting plate - 461; Auxiliary spring - 47 0; Terminal block-500; Long strip terminal-510; Interlocking mechanism-600; Transmission plate-610; Threaded hole-611; Second slide groove-612; Slot opening-613; Stop block-614; Second sliding hole-615; Slide rod-620; Return spring-630; Push plate-640; Second threaded opening-641; Locking rod-700; Rod body-710; Thread-711; Locking strip-720; Knob-730; Limiting mechanism-800; Limiting plate-810; Second slide rod-820; Second return spring-830; Triangular limit plate-840; Slider-850; Third return spring-860. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0040] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0041] Example

[0042] like Figures 1 to 8 As shown, a grounding switch interlocking device for a switchgear includes a cabinet 100. An installation frame 200 is fixedly installed inside the cabinet 100. Multiple insulating posts 300 are evenly fixedly installed on the installation frame 200, and a terminal block 500 is fixedly connected to each insulating post 300. One end of the terminal block 500 is connected to a disconnecting switch via a wire, and the other end of the terminal block 500 is movably connected to a knife switch mechanism 400, which is connected to a grounding wire via a wire. An interlocking mechanism 600 is slidably connected to one side of the cabinet 100, and a cabinet door 110 is hinged to the cabinet 100. The interlocking mechanism 600 movably abuts against the cabinet door 110.

[0043] This invention, through the cooperation of the knife switch mechanism 400 and the interlocking mechanism 600, enables the grounding switch to be quickly switched on and off by opening or closing the cabinet door 110, thereby improving operational convenience. At the same time, in emergency situations, the grounding switch can be quickly switched on and off without opening or closing the cabinet door 110, without being affected by the interlocking mechanism 600, thus enabling emergency handling. The knife switch mechanism 400 and the interlocking mechanism 600 will be described in detail later.

[0044] Furthermore, a support frame 210 is fixedly provided on one side of the mounting frame 200, and the insulating column 300 is fixedly installed on the support frame 210; a plurality of mounting slots 220 are fixedly provided on the other side of the mounting frame 200, and the mounting slots 220 correspond one-to-one with the insulating column 300;

[0045] The knife switch mechanism 400 includes a conductive rod 410, on which multiple knife switches 420 are uniformly fixedly connected. One end of the conductive rod 410 is connected to a grounding wire. One end of the knife switch 420 is provided with a connection slot 421. One end of the terminal block 500 is fixedly provided with a long strip terminal 510 at its bottom. The long strip terminal 510 corresponds one-to-one with the connection slot 421.

[0046] A pair of ear plates 230 are symmetrically extended from one end of the mounting groove 220, and each ear plate 230 on the mounting groove 220 is rotatably connected to a rotating rod 430; the knife switch 420 is fixedly connected to the rotating rod 430 at one end away from the connecting groove 421.

[0047] It is worth noting that the principle of the grounding switch of the present invention is that when one end of the conductive rod 410 is connected to the grounding wire and one end of the terminal block 500 is connected to the disconnecting switch through the wire, the rotation of the knife switch 420 is controlled to make the connection slot 421 of the knife switch 420 and the elongated terminal 510 open and close, thereby realizing the opening and closing of the grounding switch. This will not be described in detail here.

[0048] Furthermore, one end of the mounting groove 220 is rotatably connected to a first rotating shaft 460, and both ends of the first rotating shaft 460 are fixedly provided with first limiting discs 461; multiple sets of positioning plates 440 are fixedly connected to the rotating rod 430, and the knife switch 420 is located between a corresponding set of positioning plates 440; a second rotating shaft 450 is rotatably connected to each set of positioning plates 440; and both ends of the second rotating shaft 450 are fixedly provided with second limiting discs 451.

[0049] An auxiliary spring 470 is also provided on the mounting groove 220. Rotating blocks are fixed at both ends of the auxiliary spring 470, and the rotating blocks at both ends of the auxiliary spring 470 are rotatably connected to the first rotating shaft 460 and the second rotating shaft 450, respectively.

[0050] It is worth noting that the auxiliary spring 470 assists in the rotation of the knife switch 420, thereby achieving rapid connection. Specifically, when the knife switch 420 is open, the auxiliary spring 470 abuts against the positioning plate 440; when the knife switch 420 rotates to perform the connection operation, the spring 470 deflects, thereby assisting the knife switch 420 to rotate rapidly through the elastic force of the spring 470, thus achieving rapid connection operation. This will not be described in detail here.

[0051] Furthermore, the cabinet 100 has rotating holes 130 on both sides, and the two ends of the rotating rod 430 pass through the corresponding rotating holes 130 and are rotatably connected to the rotating holes 130; the two ends of the rotating rod 430 are fixedly provided with limiting blocks 432, which limit the rotating rod 430.

[0052] The limiting block 432 limits the rotating rod 430 to rotate between the two rotating holes 130 of the cabinet 100.

[0053] Furthermore, the interlocking mechanism 600 includes a transmission plate 610, on which two slide rods 620 are fixedly connected. Two sliding holes 140 are formed through one side of the cabinet 100. The slide rods 620 pass through the corresponding sliding holes 140, and the ends of the two slide rods 620 are fixedly connected to a push plate 640. A return spring 630 is sleeved on the slide rod 620, and the two ends of the return spring 630 are fixedly connected to the cabinet 100 and the transmission plate 610, respectively.

[0054] The push plate 640 has a second threaded opening 641, and a locking rod 700 is provided on the second threaded opening 641. The locking rod 700 includes a rod body 710, which has a thread 711 and is screwed to the second threaded opening 641. A knob 730 is fixedly provided at one end of the rod body 710, and a locking strip 720 is fixedly provided at the other end of the rod body 710. A second through hole 150 is provided on one side of the cabinet 100, and a long groove 151 is provided through the second through hole 150. The long groove 151 has the same shape as the locking strip 720.

[0055] Furthermore, one end of the transmission plate 610 is provided with a threaded hole 611, and the rotating rod 430 located on one side of the mounting bracket 200 is provided with an external thread 431, and the threaded hole 611 and the external thread 431 are threadedly connected.

[0056] It is worth noting that when the slide rod 620 slides on the sliding hole 140, due to the threaded connection between the threaded hole 611 and the external thread 431, the displacement of the transmission plate 610 can drive the rotating rod 430 to rotate, thereby causing the connection slot 421 of the knife switch 420 to disconnect from the long strip terminal 510 to realize the on / off operation of the grounding switch. The method of making the slide rod 620 slide will be described in detail later.

[0057] Furthermore, a limiting mechanism 800 is installed on the end of the transmission plate 610 away from the threaded hole 611. The limiting mechanism 800 includes a limiting plate 810, and two second sliding rods 820 are fixedly connected to one side of the limiting plate 810. A slot 613 is opened at the end of the transmission plate 610 away from the threaded hole 611. A stop block 614 is fixedly installed on the slot 613. A through hole is opened on the stop block 614. A second sliding hole 615 is opened at the bottom of the slot 613. The second sliding rod 820 passes through the through hole of the stop block 614 and is slidably connected to the second sliding hole 615. A second return spring 830 is sleeved on the second sliding rod 820 located between the bottom of the slot 613 and the stop block 614. The two ends of the second return spring 830 are fixedly connected to the second sliding rod 820 and the stop block 614, respectively.

[0058] It is worth noting that the present invention can allow the limiting plate 810 to enter the slot 613 by sliding the second slide bar 820, thereby avoiding the problem of the limiting plate 810 obstructing the cabinet door 110 from closing properly.

[0059] Furthermore, a second slide groove 612 is provided on each of the transmission plates 610 located on both sides of the slot 613. A third slide rod is fixedly provided on the second slide groove 612. Two sliders 850 are slidably connected to the third slide rod. The two sliders 850 are fixedly connected to a triangular limiting plate 840. A third return spring 860 is sleeved on the third slide rod. The two ends of the third return spring 860 are fixedly connected to the sliders 850 and the second slide groove 612, respectively.

[0060] A toggle plate 160 is fixedly provided on the cabinet door 110, and the toggle plate 160 is perpendicular to the cabinet door 110. When the cabinet door 110 is closed, the end of the limiting plate 810 abuts against the toggle plate 160, and at this time the connecting slot 421 of the knife switch 420 is disconnected from the elongated terminal 510. When the cabinet door is opened, the toggle plate 160 is engaged between the transmission plate 610 and the limiting plate 810, and at this time the connecting slot 421 of the knife switch 420 is inserted into the elongated terminal 510.

[0061] When the cabinet door 110 is opened, the actuating plate 160 rotates to actuate the transmission plate 610, causing the slide rod 620 to slide on the sliding hole 140. Due to the threaded connection between the threaded hole 611 and the external thread 431, the displacement of the transmission plate 610 can drive the rotating rod 430 to rotate, thereby connecting the connecting slot 421 of the knife switch 420 with the elongated terminal 510 to achieve grounding switch connection. When the cabinet door 110 is closed, the actuating plate 160 rotates in the opposite direction. At this time, under the reset action of the return spring 630, the transmission plate 610 is displaced in the opposite direction, thereby driving the rotating rod 430 to rotate in the opposite direction, disconnecting the connecting slot 421 of the knife switch 420 from the elongated terminal 510 to achieve grounding switch disconnection. Furthermore, in emergency situations, without entering... When the cabinet door 110 is opened, the push plate 640 is first pushed, causing the transmission plate 610 to shift and drive the rotating rod 430 to rotate, thereby connecting the connecting slot 421 of the knife switch 420 with the elongated terminal 510. Then, the knob 730 is rotated to misalign the locking elongated bar 720 with the long slot 151. Finally, the push plate 640 is released, and the locking elongated bar 720 is locked against the cabinet 100 under the reset action of the return spring 630. When it is necessary to disconnect the connecting slot 421 of the knife switch 420 from the elongated terminal 510, the locking elongated bar 720 is released from the abutment limit by rotating the knob 730, and then the connecting slot 421 of the knife switch 420 is disconnected from the elongated terminal 510 under the reset action of the return spring 630, thereby realizing emergency handling.

[0062] Furthermore, a control panel 120 is installed on the cabinet door 110. Controlling the switchgear via the control panel 120 is existing technology and will not be described in detail here.

[0063] A method for operating the above-mentioned switchgear grounding switch interlocking device includes the following steps:

[0064] S1. When the cabinet door 110 is opened, the actuating plate 160 turns. The end of the actuating plate 160 first acts on the triangular limiting plate 840, and then quickly moves the transmission plate 610, causing the slide rod 620 to slide on the sliding hole 140. The displacement of the transmission plate 610 drives the rotating rod 430 to rotate, thereby quickly connecting the connecting slot 421 of the knife switch 420 to the long strip terminal 510. At this time, the actuating plate 160 passes over the triangular limiting plate 840 and is locked between the transmission plate 610 and the limiting plate 810.

[0065] S2. When the cabinet door 110 is closed, the toggle plate 160 turns in the opposite direction. First, it presses against the triangular limit plate 840 to compress the third reset spring 860. After the toggle plate 160 passes the triangular limit plate 840, both the triangular limit plate 840 and the limit plate 810 are reset. At this time, under the reset action of the reset spring 630, the transmission plate 610 is displaced in the opposite direction, which in turn drives the rotating rod 430 to rotate in the opposite direction, so that the connecting slot 421 of the knife switch 420 is disconnected from the long strip terminal 510.

[0066] S3. When the cabinet door 110 is not opened to control the grounding switch, push the push plate 640 to displace the transmission plate 610 and drive the rotating rod 430 to rotate, thereby connecting the connection slot 421 of the knife switch 420 with the elongated terminal 510. Then rotate the knob 730 to make the locking elongated bar 720 misaligned with the long slot 151. Finally, release the push plate 640, and under the reset action of the return spring 630, the locking elongated bar 720 is locked against the cabinet 100. When it is necessary to disconnect the connection slot 421 of the knife switch 420 from the elongated terminal 510, rotate the knob 730 to release the locking elongated bar 720 from the abutment limit, and then under the reset action of the return spring 630, the connection slot 421 of the knife switch 420 is disconnected from the elongated terminal 510.

[0067] This invention, through the structural design of the limiting mechanism 800, not only limits and fixes the cabinet door 110 when it is opened, thus facilitating the maintenance of a connected state, but also assists in quickly connecting the connection slot 421 of the knife switch 420 to the elongated terminal 510, thereby avoiding the problem of delayed grounding switch connection when the cabinet door 110 is opened; and also prevents the cabinet door 110 from jamming. Specifically, when the cabinet door 110 is opened, the end of the actuating plate 160 first acts on the triangular limiting plate 840. Due to the limiting obstruction of the triangular limiting plate 840, the actuating plate 160 quickly actuates the transmission plate 610 in advance, thereby quickly connecting the connection slot 421 of the knife switch 420 to the elongated terminal 510. 1. It is connected to the elongated terminal 510 to avoid the problem of the grounding switch not being connected in time when the cabinet door 110 is opened; at the same time, after the cabinet door 110 is opened, the actuating plate 160 is engaged between the transmission plate 610 and the limiting plate 810. Under the action of the actuating plate 160 and the clamping action of the limiting plate 810 and the transmission plate 610, the cabinet door 110 is limited and fixed, thus facilitating the maintenance of the connected state; at the same time, through the cooperation of the triangular limiting plate 840 and the third return spring 860, the cabinet door 110 can drive the triangular limiting plate 840 to compress the third return spring 860 to move when it is closed, thereby preventing the cabinet door 110 from being blocked by the limiting mechanism 800 when it is closed and causing it to jam.

[0068] This invention utilizes the connection slot 421 of the knife switch 420 and the elongated terminal 510 for connection and cooperation. Given the length of the elongated terminal 510, the connection slot 421 of the knife switch 420 can connect to the elongated terminal 510 over a wide range, thus ensuring connectivity and fault tolerance. It avoids the problem of unstable grounding switch connection caused by the reset rebound when the limit mechanism 800 abuts against the toggle plate 160 during cabinet door 110 opening and closing. It also avoids the problem of unstable grounding switch connection due to different applied forces when manually controlling the push plate 640 and locking rod 700, comprehensively improving the connection stability of the grounding switch during device operation.

[0069] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A grounding switch interlocking device for a switchgear, characterized in that, The system includes a cabinet (100), inside which a mounting frame (200) is fixedly installed. Multiple insulating posts (300) are evenly fixedly installed on the mounting frame (200), and a terminal block (500) is fixedly connected to the insulating posts (300). One end of the terminal block (500) is connected to a disconnect switch via a wire, and the other end of the terminal block (500) is movably connected to a knife switch mechanism (400). The knife switch mechanism (400) is connected to a grounding wire via a wire. An interlocking mechanism (600) is slidably connected to one side of the inside of the cabinet (100), and a cabinet door (110) is hinged to the cabinet (100). The interlocking mechanism (600) and the cabinet door (110) are movably abutted against each other. A support frame (210) is fixedly provided on one side of the mounting frame (200), and the insulating column (300) is fixedly installed on the support frame (210); a plurality of mounting slots (220) are fixedly provided on the other side of the mounting frame (200), and the mounting slots (220) correspond one-to-one with the insulating column (300); The knife switch mechanism (400) includes a conductive rod (410), on which multiple knife switches (420) are uniformly fixedly connected. One end of the conductive rod (410) is connected to a grounding wire. One end of the knife switch (420) is provided with a connection slot (421). One end of the terminal block (500) is fixedly provided with a long strip terminal (510), and the long strip terminal (510) corresponds one-to-one with the connection slot (421). A pair of ear plates (230) are symmetrically extended from one end of the mounting slot (220), and each ear plate (230) on the mounting slot (220) is rotatably connected to a rotating rod (430); the knife switch (420) is fixedly connected to the rotating rod (430) at one end away from the connecting slot (421); The interlocking mechanism (600) includes a transmission plate (610), on which two slide rods (620) are fixedly connected. Two sliding holes (140) are opened through one side of the cabinet (100). The slide rods (620) pass through the corresponding sliding holes (140), and the ends of the two slide rods (620) are fixedly connected to a push plate (640). A return spring (630) is sleeved on the slide rod (620), and the two ends of the return spring (630) are fixedly connected to the cabinet (100) and the transmission plate (610) respectively. The push plate (640) has a second threaded opening (641) through it, and a locking rod (700) is provided on the second threaded opening (641). The locking rod (700) includes a rod body (710), and the rod body (710) has a thread (711) and is screwed to the second threaded opening (641). A knob (730) is fixedly provided at one end of the rod body (710), and a locking strip (720) is fixedly provided at the other end of the rod body (710). A second through hole (150) is provided through one side of the cabinet (100), and a long groove (151) is provided through the second through hole (150). The long groove (151) has the same shape as the locking strip (720). One end of the transmission plate (610) is provided with a threaded hole (611), and the rotating rod (430) located on one side of the mounting bracket (200) is provided with an external thread (431). The threaded hole (611) and the external thread (431) are threadedly connected.

2. The grounding switch interlocking device for a switchgear according to claim 1, characterized in that, One end of the mounting groove (220) is rotatably connected to a first rotating shaft (460), and the two ends of the first rotating shaft (460) are fixedly provided with first limiting discs (461); multiple sets of positioning plates (440) are fixedly connected to the rotating rod (430), and the knife switch (420) is located between the corresponding sets of positioning plates (440); a second rotating shaft (450) is rotatably connected to each set of positioning plates (440); the two ends of the second rotating shaft (450) are fixedly provided with second limiting discs (451). An auxiliary spring (470) is also provided on the mounting groove (220). Rotating blocks are fixed at both ends of the auxiliary spring (470). The rotating blocks at both ends of the auxiliary spring (470) are rotatably connected to the first rotating shaft (460) and the second rotating shaft (450) respectively.

3. The grounding switch interlocking device for a switchgear according to claim 1, characterized in that, The cabinet (100) has rotating holes (130) on both sides. The two ends of the rotating rod (430) pass through the corresponding rotating holes (130) and are rotatably connected to the rotating holes (130). The two ends of the rotating rod (430) are fixedly provided with limiting blocks (432), which limit the rotating rod (430).

4. The grounding switch interlocking device for a switchgear according to claim 1, characterized in that, A limiting mechanism (800) is installed at one end of the transmission plate (610) away from the threaded hole (611). The limiting mechanism (800) includes a limiting plate (810), and two second slide rods (820) are fixedly connected to one side of the limiting plate (810). A slot (613) is opened at one end of the transmission plate (610) away from the threaded hole (611), and a stop block (614) is fixedly provided on the slot (613). A through hole is provided, and a second sliding hole (615) is provided at the bottom of the slot (613); the second slide rod (820) passes through the through hole of the stop block (614) and is slidably connected with the second sliding hole (615); a second return spring (830) is sleeved on the second slide rod (820) located between the bottom of the slot (613) and the stop block (614), and the two ends of the second return spring (830) are fixedly connected to the second slide rod (820) and the stop block (614) respectively.

5. The grounding switch interlocking device for a switchgear according to claim 4, characterized in that, A second slide groove (612) is provided on both sides of the transmission plate (610) located in the slot (613). A third slide rod is fixedly provided on the second slide groove (612). Two sliders (850) are slidably connected on the third slide rod. The two sliders (850) are fixedly connected to a triangular limiting plate (840). A third return spring (860) is sleeved on the third slide rod. The two ends of the third return spring (860) are fixedly connected to the slider (850) and the second slide groove (612) respectively. A toggle plate (160) is fixedly provided on the cabinet door (110), and the toggle plate (160) is perpendicular to the cabinet door (110). When the cabinet door (110) is closed, the end of the limit plate (810) abuts against the toggle plate (160), and at this time the connecting slot (421) of the knife switch (420) is disconnected from the long strip terminal (510). When the cabinet door is opened, the toggle plate (160) is engaged between the transmission plate (610) and the limit plate (810), and at this time the connecting slot (421) of the knife switch (420) is inserted into the long strip terminal (510).

6. The grounding switch interlocking device for a switchgear according to claim 1, characterized in that, A control panel (120) is installed on the cabinet door (110).

7. A method for operating a switchgear grounding switch interlocking device according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1. When the cabinet door (110) is opened, the actuating plate (160) turns. The end of the actuating plate (160) first acts on the triangular limiting plate (840), and then quickly moves the transmission plate (610), so that the slide rod (620) slides on the sliding hole (140). The displacement of the transmission plate (610) drives the rotating rod (430) to rotate, so that the connecting slot (421) of the knife switch (420) is quickly inserted into the long strip terminal (510). At this time, the actuating plate (160) passes over the triangular limiting plate (840) and is locked between the transmission plate (610) and the limiting plate (810). S2. When the cabinet door (110) is closed, the toggle plate (160) turns in the opposite direction. First, it presses against the triangular limit plate (840) to compress the third reset spring (860). When the toggle plate (160) passes the triangular limit plate (840), both the triangular limit plate (840) and the limit plate (810) are reset. At this time, under the reset action of the reset spring (630), the transmission plate (610) is displaced in the opposite direction, which in turn drives the rotating rod (430) to rotate in the opposite direction, so that the connecting slot (421) of the knife switch (420) is disconnected from the long strip terminal (510). S3. When the cabinet door (110) is not opened to control the grounding switch, push the push plate (640) to displace the transmission plate (610) and drive the rotating rod (430) to rotate, so that the connection slot (421) of the knife switch (420) is inserted into the long strip terminal (510). Then rotate the knob (730) to make the locking strip (720) misaligned with the long slot (151). Finally, release the push plate (640) and the locking strip (720) is locked on the cabinet (100) under the reset action of the reset spring (630). When it is necessary to disconnect the connection slot (421) of the knife switch (420) from the long strip terminal (510), rotate the knob (730) to release the locking strip (720) from the abutment limit, and then the connection slot (421) of the knife switch (420) is disconnected from the long strip terminal (510) under the reset action of the reset spring (630).

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