Anti-misoperation mechanical interlocking device of high-voltage switch equipment cabinet and high-voltage switch equipment cabinet

Abstract

The invention discloses a high-voltage switch equipment cabinet anti-misoperation mechanical interlocking device and a high-voltage switch equipment cabinet, the high-voltage switch equipment cabinet anti-misoperation mechanical interlocking device comprises a main loop switch device and a standby loop switch device which are arranged in a cabinet body and connected in parallel, the main loop switch device comprises a circuit breaker and an isolation switch, and the standby loop switch device comprises a load switch. The circuit breaker isolation interlocking mechanism is arranged between the circuit breaker and the isolation switch, and the grounding limiting locking mechanism and the load isolation locking limiting grounding mechanism are arranged between the isolation switch and the load switch. A double-loop structure with one main loop and one standby loop is adopted, the main loop adopts the circuit breaker and the disconnecting switch and is responsible for main electric energy transmission tasks, the standby loop adopts the load switch design, and it is ensured that when the main loop cannot work due to faults, the main loop can be rapidly and seamlessly switched to the standby loop. And a plurality of groups of electrical mechanical interlocking devices are designed between the main circuit breaker and the standby load switch, so that the safety of operation and the convenience of maintenance are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a mechanical interlocking device for preventing misoperation of a high-voltage switchgear cabinet and a high-voltage switchgear cabinet. Background Art

[0002] Photovoltaic power generation is a clean, renewable new energy form, and its application is becoming more and more widespread. However, the power generation of photovoltaic power stations is directly affected by the intensity of sunlight, which leads to frequent switching operations every day to control the input and output of electric energy. When dealing with such high-frequency operations, existing switchgear often has the following problems: First, the single-circuit design, once the main circuit fails, it is easy to cause the entire system to be paralyzed, affecting the continuity and stability of power supply; second, when the dual-circuit design is carried out, the mechanical interlocking between the circuits in the switchgear cannot be achieved, and there is a lack of anti-misoperation. If the equipment is powered off or powered on, if the operation is improper, it is very easy to cause live opening and closing operations, and the safety and reliability are low. Summary of the invention

[0003] In order to solve the technical problems mentioned in the background technology, the present invention provides a mechanical interlocking device for preventing misoperation of a high-voltage switchgear cabinet and a high-voltage switchgear cabinet.

[0004] The present invention adopts the following technical scheme, a mechanical interlocking device for preventing misoperation of a high-voltage switchgear cabinet, comprising a main circuit switchgear and a backup circuit switchgear arranged in parallel with each other in the cabinet; the main circuit switchgear comprises a circuit breaker and a disconnector connected in series with each other through a copper busbar; the backup circuit switchgear comprises a load switch; it is characterized in that it comprises a circuit breaker isolation interlocking mechanism arranged between the circuit breaker and the disconnector, a grounding limit locking mechanism arranged between the disconnector and the load switch, and a load isolation locking limit grounding mechanism.

[0005] Furthermore, the circuit breaker isolation interlocking mechanism comprises an isolation locking shaft end crank arm linked with the isolation opening and closing operating shaft; the upper end of the isolation locking shaft end crank arm is axially connected to the end of the connecting rod; the other end of the connecting rod is axially connected to the circuit breaker closing locking rotating plate; the rotation point located at the top of the circuit breaker closing locking rotating plate is rotatably connected to the circuit breaker closing locking bracket; the circuit breaker closing locking bracket is installed and fixed on one side of the circuit breaker operating mechanism; a first limit baffle is arranged on the top of the circuit breaker closing locking rotating plate; the first limit baffle is used to limit the closing button rod of the circuit breaker operating mechanism from pressing the closing button when the isolation opening and closing operating shaft rotates to the closing position; It also includes a locking isolation bracket installed on the other side of the circuit breaker operating mechanism; the outer side of the locking isolation bracket is slidably connected to the locking isolation transmission plate, and a Y-axis direction reset spring is connected between the two; the bottom of the locking isolation transmission plate is connected to a locking isolation baffle; the locking isolation transmission plate is used to link with the rotating crank arm of the circuit breaker operating mechanism; when the rotating crank arm rotates downward, it pushes the locking isolation transmission plate to slide downward along the locking isolation bracket so that the locking isolation baffle blocks the isolation opening and closing operating shaft.

[0006] Further, the grounding restriction locking mechanism includes a grounding locking mounting frame; one end of the grounding locking mounting frame is mounted on the isolating switch operating mechanism, and the other end is mounted on the load switch operating mechanism; the grounding locking mounting frame is horizontally slidably connected to the grounding locking transmission plate, and the first X-axis direction reset spring is connected between the two; the grounding locking transmission plate is provided with a locking isolation baffle plate at one end near the isolating opening and closing operating shaft; the grounding locking transmission plate is provided with a locking load baffle plate at one end near the load switch opening and closing operating shaft; the isolation grounding operating shaft of the isolating switch operating mechanism and the load grounding operating shaft of the load switch operating mechanism are axially connected to the grounding locking crank arm; the grounding locking crank arm is linked with the end of the grounding locking transmission plate; when either the isolation grounding operating shaft or the load grounding operating shaft is rotated to the grounding closing position, the grounding locking crank arm horizontally pushes the grounding locking transmission plate to the locking isolation baffle plate and the locking load baffle plate to respectively block the isolation opening and closing operating shaft and the load switch opening and closing operating shaft, so that the isolating switch operating mechanism and the load switch operating mechanism cannot perform opening and closing operations.

[0007] Furthermore, a second limit baffle is arranged in the middle of the grounding locking transmission plate; a handle baffle is arranged below the second limit baffle; a plurality of cable compartment door locking rods are arranged in sequence at the bottom of the handle baffle; and the cable compartment door locking rod is connected to the hole at the top of the cable compartment door at the bottom of the cabinet.

[0008] Furthermore, a locking slide is arranged at the bottom of the isolating switch operating mechanism and the load switch operating mechanism; the locking slide is connected by a reset spring in the Z-axis direction; the locking slide is arranged on the rear side of the cable compartment door locking rod; when the cable compartment door locking rod is lifted along with the handle baffle, the locking slide moves forward to the bottom of the cable compartment door locking rod under the push of the reset spring in the Z-axis direction to limit the downward movement of the cable compartment door locking rod; when the handle baffle is lifted to the maximum height, the isolating opening and closing operating shaft, the isolating grounding operating shaft and the load switch opening and closing operating shaft, and the load grounding operating shaft can be blocked.

[0009] Furthermore, the load isolation locking limiting grounding mechanism includes a load isolation locking bracket; one end of the load isolation locking bracket is installed on the isolating switch operating mechanism, and the other end is installed on the load switch operating mechanism; the load isolation locking bracket is located below the grounding locking mounting frame; the load isolation locking bracket is horizontally slidably connected to the load isolation locking grounding baffle, and a second X-axis direction reset spring is installed between the two; third limit baffles are arranged on the left and right ends of the load isolation locking grounding baffle, and the third limit baffles are respectively close to the isolation mechanism opening and closing indication shaft and the load mechanism opening and closing indication shaft; the isolation mechanism opening and closing indication shaft is connected to the isolation mechanism opening and closing crank arm; the load mechanism opening and closing indication shaft is connected to the load mechanism opening and closing crank arm; when the isolation mechanism opening and closing indication shaft or the load mechanism opening and closing indication shaft rotates to the closing indication, the isolation mechanism opening and closing crank arm or the load mechanism opening and closing crank arm rotates and pushes the load isolation locking grounding baffle to slide horizontally to block the isolation grounding operating shaft and the load grounding operating shaft.

[0010] The present invention also provides a high-voltage switchgear cabinet, comprising the cabinet body; an intelligent control instrument room is arranged on the top of the cabinet body; an operation panel and a cable compartment panel are arranged on the front of the cabinet body; an operating mechanism room and a closed air chamber are arranged in sequence at the upper end of the cabinet body; a cable compartment is arranged at the lower end of the cabinet body; an incoming bushing is arranged at the upper end of the operating mechanism room; an outgoing bushing is arranged at the lower end of the operating mechanism room; the above-mentioned high-voltage switchgear cabinet anti-misoperation mechanical interlocking device is arranged in the operating mechanism room; the main circuit switchgear and the standby circuit switchgear in the anti-misoperation mechanical interlocking device of the high-voltage switchgear cabinet are respectively connected to the incoming bushing and the outgoing bushing through a first copper busbar and a second copper busbar.

[0011] Compared with the prior art, the mechanical interlocking device for preventing misoperation of the high-voltage switchgear cabinet designed in the present invention adopts a dual-circuit structure of one main and one standby. The main circuit adopts a circuit breaker and an isolating switch design, which is responsible for the main power transmission task. The standby circuit adopts a load switch design and is connected in parallel with the main circuit, ensuring that when the main circuit cannot work due to a fault, it can be quickly and seamlessly switched to the standby circuit to ensure uninterrupted power supply. Multiple sets of electrical and mechanical interlocking devices are designed between the main circuit breaker and the standby load switch to ensure that at any time, when one of the main circuits in the main and standby circuits is in the closed state, the main and standby circuits cannot be grounded to avoid short circuits caused by misoperation; on the contrary, when any of the grounding switches of the main circuit breaker and the grounding switch of the standby load switch are operated for grounding and closing maintenance, the main and standby switches cannot be opened and closed, which is convenient for safe isolation during on-site maintenance and protects the safety of maintenance personnel, thereby realizing mechanical interlocking between the circuits, effectively preventing misoperation, and improving safety and reliability.

[0012] The high-voltage switchgear cabinet designed in the present invention not only realizes the automatic control of high-frequency breaking, but also significantly improves the reliability and safety of the switchgear through the one-main-one-standby circuit design and the main-standby circuit electrical and mechanical interlocking device design. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the mechanical interlocking device for preventing misoperation of a high-voltage switchgear cabinet of the present invention; Figure 2 It is a schematic diagram of the overall structure of the circuit breaker isolation interlocking mechanism of the present invention; Figure 3 The schematic diagram of the use state of the isolation interlocking mechanism of the circuit breaker of the present invention is shown in FIG. Figure 1 ; Figure 4 The schematic diagram of the use state of the isolation interlocking mechanism of the circuit breaker of the present invention is shown in FIG. Figure 2 ; Figure 5 It is a schematic diagram of the overall structure of the grounding limit locking mechanism in the present invention; Figure 6 It is a diagram of the use state of the ground limit locking mechanism in the present invention; Figure 7 It is a schematic diagram of the overall structure of the load isolation locking and limiting grounding mechanism in the present invention; Figure 8 It is a use state diagram of the load isolation locking limit grounding mechanism in the present invention; Fig. 9 It is a schematic diagram of the positional relationship between the grounding restriction locking mechanism and the load isolation locking restriction grounding mechanism in the present invention; Fig.10 It is a front schematic diagram of the installation positions of the main circuit switchgear and the standby circuit switchgear in the high-voltage switchgear cabinet of the present invention; Fig.11 It is a schematic diagram of the back side of the installation position of the main circuit switchgear and the standby circuit switchgear in the high-voltage switchgear cabinet of the present invention; Fig.12 It is a front view of the high-voltage switchgear cabinet of the present invention; Fig.13 It is a side view of the high-voltage switchgear cabinet of the present invention.

[0014] in: 1-circuit breaker isolation interlocking mechanism, 2-grounding limit locking mechanism, 3-load isolation locking limit grounding mechanism, 4-operation panel, 5-cable compartment, 6-operation mechanism room, 7-enclosed gas chamber, 8-inlet bushing, 9-outlet bushing, 10-cabinet, 11-circuit breaker, 12-isolating switch, 13-load switch, 14-intelligent control instrument room, 1-1-Y-axis direction return spring, 1-2-first limit baffle, 1-3-locking isolation transmission plate, 1-4-locking isolation bracket, 1-5-circuit breaker closing locking bracket, 1-6-circuit breaker closing locking rotating plate, 1-7-locking isolation baffle, 1-8-connecting rod, 1-9-isolation locking shaft end turning arm; 2-1-second limit baffle, 2-2-ground locking crank arm, 2-3-ground locking mounting frame, 2-4-ground locking transmission plate, 2-5-locking isolation baffle, 2-6-locking load baffle, 2-7-handle baffle, 2-8-cable compartment door locking rod, 2-9-locking slide, 2-10-first X-axis direction return spring, 3-1- load isolation locking bracket, 3-2- load isolation locking grounding baffle, 3-3- isolation mechanism opening and closing crank arm, 3-4- second X-axis direction reset spring, 3-5- load mechanism opening and closing crank arm, 11-1-circuit breaker operating mechanism, 11-2-rotating crank arm, 12-1-isolating switch operating mechanism, 12-2-isolating opening and closing operating shaft, 12-3-isolating grounding operating shaft, 12-4-isolating mechanism opening and closing indicating shaft, 13-1-load switch operating mechanism, 13-2-load switch opening and closing operating axis, 13-3-load grounding operating axis, 13-4-load mechanism opening and closing indication axis. DETAILED DESCRIPTION

[0015] In order to facilitate those skilled in the art to understand the technical solution of the present invention, further description will be given below with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0016] In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of embodiments of the present invention. However, it is apparent that one or more embodiments may be implemented without these specific details. In addition, in the following description, descriptions of known structures and techniques are omitted to avoid unnecessary confusion of concepts of the present invention. like Figure 1 , 10As shown in Figures 1 and 11, the mechanical interlocking device for preventing misoperation of a high-voltage switchgear cabinet designed by the present invention comprises a main circuit switchgear and a standby circuit switchgear which are arranged in parallel in the cabinet 10. The main circuit switchgear comprises a circuit breaker 11 and a disconnector 12 which are connected in series through a copper busbar, and the standby circuit switchgear comprises a load switch 13. It also comprises a circuit breaker isolation interlocking mechanism 1 arranged between the circuit breaker 11 and the disconnector 12, a grounding restriction locking mechanism 2 arranged between the disconnector 12 and the load switch 13, and a load isolation locking restriction grounding mechanism 3, thereby realizing the state interlocking and preventing misoperation of the main and standby circuit mechanical operation opening and closing operating mechanisms, ensuring the stability and reliability of the transmission and distribution lines and the personal and property safety of the operation and maintenance operations.

[0017] like Figure 2-4 As shown, in this embodiment, the circuit breaker isolation interlocking mechanism 1 realizes the safety and anti-misoperation function between the circuit breaker and the isolating switch operating mechanism 12-1, that is, the isolating switch operating mechanism 12-1 can only perform the next closing operation of the circuit breaker operating mechanism 11-1 after the isolation closing operation; otherwise, the closing operation of the circuit breaker operating mechanism 11-1 cannot be performed. After the closing operation of the circuit breaker operating mechanism 11-1 is completed, the opening and closing operations of the isolating switch operating mechanism 12-1 can no longer be performed. This device realizes the safety and reliability of the live anti-misoperation of the switchgear.

[0018] In specific implementation, the circuit breaker isolation interlocking mechanism 1 includes an isolation locking shaft end crank arm 1-9 linked to the isolation opening and closing operating shaft 12-2, the upper end of the isolation locking shaft end crank arm 1-9 is axially connected to the end of the connecting rod 1-8, and the other end of the connecting rod 1-8 is axially connected to the circuit breaker closing locking turn plate 1-6. The rotation point located at the top of the circuit breaker closing locking turn plate 1-6 is rotatably connected to the circuit breaker closing locking bracket 1-5. The circuit breaker closing locking bracket 1-5 is installed and fixed on one side of the circuit breaker operating mechanism 11-1, and a first limit baffle 1-2 is arranged on the top of the circuit breaker closing locking turn plate 1-6. The first limit baffle 1-2 is used to limit the closing button rod of the circuit breaker operating mechanism 11-1 from pressing the closing button when the isolation opening and closing operating shaft 12-2 rotates to the opening position. At this time, the circuit breaker closing button cannot be pressed down to close the circuit breaker. On the contrary, when the isolating and closing operating shaft 12-2 is rotated to the closing position, the first limit baffle 1-2 of the circuit breaker closing lock rotating plate 1-6 is rotated out from the tail of the closing button rod of the circuit breaker operating mechanism 11-1. At this time, the circuit breaker can be closed only by pressing the circuit breaker closing button.

[0019] In a specific implementation, the circuit breaker isolation interlocking mechanism 1 also includes a locking isolation bracket 1-4 installed on the other side of the circuit breaker operating mechanism 11-1. The outer side of the locking isolation bracket 1-4 is slidably connected to the locking isolation transmission plate 1-3, and a Y-axis direction reset spring 1-1 is connected between the two. The bottom of the locking isolation transmission plate 1-3 is connected to a locking isolation baffle 1-7. The locking isolation transmission plate 1-3 is used to link with the rotating crank arm 11-2 of the circuit breaker operating mechanism 11-1. When the rotating crank arm 11-2 rotates downward, it pushes the locking isolation transmission plate 1-3 to slide downward along the locking isolation bracket 1-4 so that the locking isolation baffle 1-7 blocks the isolation opening and closing operating shaft 12-2. In specific implementation, after the circuit breaker operating mechanism 11-1 performs the closing operation, the locking isolation bracket 1-4 is pushed down and slid by the rotating crank arm 11-2 of the circuit breaker operating mechanism 11-1, and the locking isolation baffle 1-7 connected to its lower end is pushed down to block the isolation opening and closing operating shaft 12-2, thereby achieving the situation that the disconnector operating mechanism 12-1 cannot be operated after the circuit breaker operating mechanism 11-1 is closed; on the contrary, when the circuit breaker operating mechanism 11-1 is in the opening position, the locking isolation transmission plate 1-3 is pulled up and slid by the Y-axis direction return spring 1-1 installed between it and the locking isolation bracket 1-4, thereby driving the locking isolation baffle 1-7 to slide up, and opening the isolation opening and closing operating shaft 12-2, at which time the disconnector operating mechanism 12-1 can perform the opening and closing operations.

[0020] like Figure 5-6 As shown, the grounding limit locking mechanism 2 realizes the safety and anti-misoperation function of power outage maintenance of the main and standby circuits. That is, when power outage maintenance is required, either the main circuit disconnect switch operating mechanism 12-1 or the standby load switch operating mechanism 13-1 is grounded and closed. The main circuit disconnect opening and closing operating shaft 12-2 and the standby circuit load switch opening and closing operating shaft 13-2 are blocked and limited to make them inoperable. At the same time, the cable compartment door locking rod handle can be lifted, and the cable compartment door can be opened for maintenance, thereby further realizing the safety and reliability of the grounding maintenance of the switchgear.

[0021] In a specific implementation, the grounding limit locking mechanism 2 includes a grounding locking mounting frame 2-3, one end of which is mounted on the isolating switch operating mechanism 12-1, and the other end is mounted on the load switch operating mechanism 13-1. The grounding locking mounting frame 2-3 is horizontally slidably connected to the grounding locking transmission plate 2-4, and the first X-axis direction reset spring 2-10 is connected between the two. In a specific implementation, the first X-axis direction reset spring 2-10 ensures that the reset position of the grounding locking transmission plate 2-4 is always in a horizontal right position when it is not subjected to external thrust. A locking isolation baffle 2-5 is provided at one end of the grounding locking transmission plate 2-4 close to the isolating opening and closing operating shaft 12-2, and a locking load baffle 2-6 is provided at one end of the grounding locking transmission plate 2-4 close to the load switch opening and closing operating shaft 13-2. When the grounding locking transmission plate 2-4 is in the reset state, the isolation opening and closing operation shaft 12-2 and the load switch opening and closing operation shaft 13-2 are not blocked by the locking isolation baffle 2-5 and the locking load baffle 2-6, that is, at this time, any operating mechanism can be opened and closed. The isolation grounding operation shaft 12-3 of the isolation switch operating mechanism 12-1 and the load grounding operation shaft 13-3 of the load switch operating mechanism 13-1 are connected to the grounding locking crank arm 2-2, and the grounding locking crank arm 2-2 is linked to the end of the grounding locking transmission plate 2-4. When either the isolation grounding operating shaft 12-3 or the load grounding operating shaft 13-3 is rotated to the grounding closing position, the grounding locking arm 2-2 rotates with the operating shaft to the horizontal position and pushes the grounding locking transmission plate 2-4 to lock the isolation baffle 2-5 and the load baffle 2-6 to respectively block the isolation opening and closing operating shaft 12-2 and the load switch opening and closing operating shaft 13-2, so that the main circuit isolation switch operating mechanism 12-1 and the standby circuit load switch operating mechanism 13-1 cannot perform opening and closing operations.

[0022] In addition, in this embodiment, a second limit baffle 2-1 is provided in the middle of the grounding locking transmission plate 2-4, a handle baffle 2-7 is provided below the second limit baffle 2-1, and a plurality of cable compartment door locking rods 2-8 are sequentially provided at the bottom of the handle baffle 2-7, and the cable compartment door locking rods 2-8 are connected to the opening at the top of the cable compartment door 5 at the bottom of the cabinet 10. When the grounding locking transmission plate 2-4 is in the right push grounding position, the handle baffle 2-7 is given way, so that the handle baffle 2-7 can be lifted up a certain distance until the cable compartment door locking rod 2-8 connected thereto is pulled out from the opening at the upper edge of the cable compartment door 5, and at this time, the cable compartment door 5 can be removed.

[0023] like Figure 5-6As shown, a locking slide 2-9 is provided at the bottom of the isolating switch operating mechanism 12-1 and the load switch operating mechanism 13-1, and the locking slide 2-9 is connected by a Z-axis direction return spring, and the locking slide 2-9 is provided at the rear side of the cable compartment door locking rod 2-8. When the cable compartment door locking rod 2-8 is lifted up along with the handle baffle 2-7, the locking slide 2-9 is pushed forward to the bottom of the cable compartment door locking rod 2-8 by the Z-axis direction return spring to limit the cable compartment door locking rod 2-8 from sliding down. When the handle baffle 2-7 is lifted up to the maximum height, the isolating opening and closing operating shaft 12-2, the isolating grounding operating shaft 12-3 and the load switch opening and closing operating shaft 13-2, and the load grounding operating shaft 13-3 can be shielded, so that the isolating switch operating mechanism 12-1 and the load switch operating mechanism 13-1 cannot perform any opening and closing operations. On the contrary, when the door of the cable compartment 5 is correctly installed, the door pushes the locking slide 2-9 backward until the cable compartment door locking rod 2-8 falls into the opening corresponding to the door of the cable compartment 5, and the handle baffle 2-7 connected thereto also falls and no longer blocks all operating axes of the isolating switch operating mechanism 12-1 and the load switch operating mechanism 13-1, and then the operating mechanism that is already in the grounding closing position is rotated to the grounding opening position, and the corresponding grounding locking crank arm 2-2 rotates accordingly, and the grounding locking transmission plate 2-4 is now slid and reset under the action of the reset spring 2-10 in the first X-axis direction, and the second limit baffle 2-1 in the middle limits the handle baffle 2-7 again, so that it cannot be lifted up, so that the cable compartment 5 door cannot be opened after the grounding opening.

[0024] like Figure 7-9 As shown, the load isolation locking and limiting grounding mechanism 3 realizes the safety and anti-misoperation function of the isolation closing operation and the load closing operation locking grounding operation of the isolation switch operating mechanism 12-1 of the main circuit and the load switch operating mechanism 13-1 in the standby circuit. That is, when the isolation switch operating mechanism 12-1 of the main circuit is closed or the load switch operating mechanism 13-1 is closed, it is impossible to perform grounding opening and closing operations on either mechanism, thereby preventing short circuit of the transmission and distribution lines and the personal and property safety of operators and maintenance personnel. That is, after the isolation opening and closing operation shaft 12-2 of the isolation switch operating mechanism 12-1 or the load switch opening and closing operation shaft 13-2 of the load switch operating mechanism 13-1 is closed, the grounding operation shafts of both are blocked, so that they cannot perform grounding opening and closing operations.

[0025] In specific implementation, the load isolation locking limit grounding mechanism 3 is located as a whole below the handle baffle 2-7, and includes a load isolation locking bracket 3-1, one end of which is mounted on the isolating switch operating mechanism 12-1, and the other end is mounted on the load switch operating mechanism 13-1. The load isolation locking bracket 3-1 is located below the grounding locking mounting frame 2-3, and the load isolation locking grounding baffle 3-2 is horizontally slidably connected to the load isolation locking bracket 3-1, and a second X-axis direction reset spring 3-4 is installed between the two, so that the load isolation locking grounding baffle 3-2 is reset to the horizontal right. The third limit baffles are arranged at the left and right ends of the load isolation locking grounding baffle 3-2, and the third limit baffles are respectively close to the isolation mechanism opening and closing indication shaft 12-4 and the load mechanism opening and closing indication shaft 13-4, the upper axis of the isolation mechanism opening and closing indication shaft 12-4 is connected to the isolation mechanism opening and closing crank arm 3-3, and the upper axis of the load mechanism opening and closing indication shaft 13-4 is connected to the load mechanism opening and closing crank arm 3-5. When the load isolation locking grounding baffle 3-2 is in the reset state, the isolation grounding operating shaft 12-3 and the load switch 13-3 are not blocked by it, and the operating handle can be inserted to perform grounding opening and closing operations on the operating mechanism. When the isolation mechanism opening and closing indication shaft 12-4 or the load mechanism opening and closing indication shaft 13-4 rotates to the closing indication, the isolation mechanism opening and closing crank arm 3-3 or the load mechanism opening and closing crank arm 3-5 rotates and pushes the load isolation locking grounding baffle 3-2 to slide horizontally to block the isolation grounding operating shaft 12-3 and the load grounding operating shaft 13-3, so that after the switch operating mechanism of the main circuit or the standby circuit is closed, its grounding operating shaft cannot perform grounding opening and closing operations.

[0026] In summary, the mechanical interlocking device for preventing misoperation of the high-voltage switchgear cabinet designed by the present invention adopts a dual-circuit structure of one main and one standby. The main circuit is designed with a circuit breaker and an isolating switch, which is responsible for the main power transmission task. The standby circuit is designed with a load switch and is connected in parallel with the main circuit, ensuring that when the main circuit cannot work due to a fault, it can be quickly and seamlessly switched to the standby circuit to ensure uninterrupted power supply. Multiple sets of electrical and mechanical interlocking devices are designed between the main circuit breaker and the standby load switch to ensure that at any time, when one of the main circuits in the main and standby circuits is in a closed state, the main and standby circuits cannot be grounded to avoid short circuits caused by misoperation; on the contrary, when any of the grounding switches of the main circuit breaker and the grounding switch of the standby load switch are operated for grounding and closing maintenance, the main and standby switches cannot be opened and closed, which is convenient for safe isolation during on-site maintenance and protects the safety of maintenance personnel, thereby realizing mechanical interlocking between the circuits, effectively preventing misoperation, and improving safety and reliability.

[0027] like Figure 12-13As shown, the present invention also provides a high-voltage switchgear cabinet, including a cabinet 10, an intelligent control instrument room 14 is arranged on the top of the cabinet 10, an operation panel 4 and a cable compartment panel are arranged on the front of the cabinet 10, and an operating mechanism room 6 and a closed air chamber 7 are arranged in sequence near the upper end of the cabinet 10. A cable compartment 5 is arranged near the lower end of the cabinet 10, an incoming bushing 8 is arranged at the upper end of the operating mechanism room 6, and an outgoing bushing 9 is arranged at the lower end of the operating mechanism room 6. The high-voltage switchgear cabinet anti-misoperation mechanical interlocking device according to any one of claims 1 to 6 is arranged in the operating mechanism room 6, and the main circuit switchgear and the standby circuit switchgear in the anti-misoperation mechanical interlocking device of the high-voltage switchgear cabinet are connected to the incoming bushing 8 and the outgoing bushing 9 through the first copper busbar and the second copper busbar, respectively.

[0028] During the specific implementation, the intelligent control instrument room 14 mainly performs intelligent monitoring, uploading, remote control, and intelligent processing of the equipment's upstream power, equipment operating status, and equipment operating environment. The programmed control logic operates and monitors the main circuit breaker and standby load switch, and satisfies the interlocking relationship between the main and standby circuits, ensuring the reliable operation of the equipment and the safety of the operation and maintenance personnel.

[0029] The high-voltage switchgear cabinet designed by the present invention not only realizes the automatic control of high-frequency disconnection, but also significantly improves the reliability and safety of the switchgear through the design of one main and one standby circuit and the design of the main and standby circuit electrical and mechanical interlocking device. The dual-circuit parallel optimization design of the shared input and output lines improves the performance while realizing the miniaturization of the equipment, reducing the production cost and installation space requirements. At the same time, the dual-circuit design improves the overall utilization of the system and reduces the energy waste caused by equipment failure.

[0030] The above embodiments are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A mechanical interlocking device for preventing misoperation of a high-voltage switchgear cabinet, comprising a main circuit switchgear and a backup circuit switchgear arranged in parallel in a cabinet body (10); the main circuit switchgear comprises a circuit breaker (11) and an isolating switch (12) connected in series via a copper busbar; the backup circuit switchgear comprises a load switch (13); characterized in that: The invention comprises a circuit breaker isolation interlocking mechanism (1) arranged between the circuit breaker (11) and the isolating switch (12), a grounding limiting locking mechanism (2) arranged between the isolating switch (12) and the load switch (13), and a load isolation locking limiting grounding mechanism (3).

2. The mechanical interlocking device for preventing misoperation of a high-voltage switchgear cabinet according to claim 1 is characterized in that: The circuit breaker isolation interlocking mechanism (1) comprises an isolation locking shaft end crank arm (1-9) linked to an isolation opening and closing operating shaft (12-2); the upper end of the isolation locking shaft end crank arm (1-9) is axially connected to the end of a connecting rod (1-8); the other end of the connecting rod (1-8) is axially connected to a circuit breaker closing locking rotating plate (1-6); a rotation point located at the top of the circuit breaker closing locking rotating plate (1-6) is rotatably connected to a circuit breaker closing locking bracket (1-5); the circuit breaker closing locking bracket (1-5) is fixedly mounted on one side of the circuit breaker operating mechanism (11-1); a first limit baffle (1-2) is arranged at the top of the circuit breaker closing locking rotating plate (1-6); the first limit baffle (1-2) is used to limit the closing button rod of the circuit breaker operating mechanism (11-1) from being pressed to close when the isolation opening and closing operating shaft (12-2) is rotated to the opening position; It also includes a locking isolation bracket (1-4) installed on the other side of the circuit breaker operating mechanism (11-1); the locking isolation bracket (1-4) is slidably connected to the locking isolation transmission plate (1-3) on the outside, and a Y-axis direction return spring (1-1) is connected between the two; the bottom of the locking isolation transmission plate (1-3) is connected to the locking isolation baffle (1-7); the locking isolation transmission plate (1-3) is used to be linked with the rotating crank arm (11-2) of the circuit breaker operating mechanism (11-1); when the rotating crank arm (11-2) rotates downward, it pushes the locking isolation transmission plate (1-3) to slide downward along the locking isolation bracket (1-4) so ​​that the locking isolation baffle (1-7) blocks the isolation opening and closing operating shaft (12-2).

3. The mechanical interlocking device for preventing misoperation of a high-voltage switchgear cabinet according to claim 2 is characterized in that: The grounding restriction locking mechanism (2) comprises a grounding locking mounting frame (2-3); one end of the grounding locking mounting frame (2-3) is mounted on the isolating switch operating mechanism (12-1), and the other end is mounted on the load switch operating mechanism (13-1); the grounding locking transmission plate (2-4) is horizontally slidably connected to the grounding locking mounting frame (2-3), and a first X-axis direction return spring (2-10) is connected between the two; a locking isolation baffle (2-5) is provided at one end of the grounding locking transmission plate (2-4) close to the isolating opening and closing operating shaft (12-2); a locking load baffle (2-6) is provided at one end of the grounding locking transmission plate (2-4) close to the load switch opening and closing operating shaft (13-2); the isolating grounding of the isolating switch operating mechanism (12-1) is provided on the grounding locking transmission plate (2-4). The operating shaft (12-3) and the upper shaft of the load grounding operating shaft (13-3) of the load switch operating mechanism (13-1) are connected to the grounding locking crank arm (2-2); the grounding locking crank arm (2-2) is linked with the end of the grounding locking transmission plate (2-4); when either the isolated grounding operating shaft (12-3) or the load grounding operating shaft (13-3) is rotated to the grounding closing position, the grounding locking crank arm (2-2) horizontally pushes the grounding locking transmission plate (2-4) to lock the isolated baffle plate (2-5) and the load baffle plate (2-6) to respectively block the isolated opening and closing operating shaft (12-2) and the load switch opening and closing operating shaft (13-2), so that the isolated switch operating mechanism (12-1) and the load switch operating mechanism (13-1) cannot perform opening and closing operations.

4. The mechanical interlocking device for preventing misoperation of a high-voltage switchgear cabinet according to claim 3 is characterized in that: A second limit baffle (2-1) is arranged in the middle of the grounding locking transmission plate (2-4); a handle baffle (2-7) is arranged below the second limit baffle (2-1); a plurality of cable compartment door locking rods (2-8) are arranged in sequence at the bottom of the handle baffle (2-7); the cable compartment door locking rods (2-8) are connected to an opening at the top of the compartment door of the cable compartment (5) at the bottom of the cabinet (10).

5. The mechanical interlocking device for preventing misoperation of a high-voltage switchgear cabinet according to claim 4 is characterized in that: A locking slide (2-9) is arranged at the bottom of the isolating switch operating mechanism (12-1) and the load switch operating mechanism (13-1); the locking slide (2-9) is connected via a Z-axis direction return spring; the locking slide (2-9) is arranged at the rear side of the cable compartment door locking rod (2-8); when the cable compartment door locking rod (2-8) is lifted up along with the handle baffle (2-7), the locking slide (2-9) is pushed forward to the bottom of the cable compartment door locking rod (2-8) by the Z-axis direction return spring to limit the cable compartment door locking rod (2-8) from sliding down; when the handle baffle (2-7) is lifted up to the maximum height, the isolating opening and closing operating shaft (12-2), the isolating grounding operating shaft (12-3) and the load switch opening and closing operating shaft (13-2), and the load grounding operating shaft (13-3) can be shielded.

6. The mechanical interlocking device for preventing misoperation of a high-voltage switchgear cabinet according to claim 5 is characterized in that: The load isolation locking limit grounding mechanism (3) comprises a load isolation locking bracket (3-1); one end of the load isolation locking bracket (3-1) is mounted on the isolating switch operating mechanism (12-1), and the other end is mounted on the load switch operating mechanism (13-1); the load isolation locking bracket (3-1) is located below the grounding locking mounting frame (2-3); the load isolation locking bracket (3-1) is horizontally slidably connected to the load isolation locking grounding baffle (3-2), and a second X-axis direction reset spring (3-4) is installed between the two; third limit baffles are arranged at the left and right ends of the load isolation locking grounding baffle (3-2), and the third limit baffles are respectively close to the isolation The isolation mechanism opening and closing indication shaft (12-4) and the load mechanism opening and closing indication shaft (13-4) are connected to the isolation mechanism opening and closing indication shaft (12-4) via an upper shaft connected to the isolation mechanism opening and closing indication shaft (3-3); the load mechanism opening and closing indication shaft (13-4) via an upper shaft connected to the load mechanism opening and closing indication shaft (3-5); when the isolation mechanism opening and closing indication shaft (12-4) or the load mechanism opening and closing indication shaft (13-4) rotates to indicate closing, the isolation mechanism opening and closing indication shaft (3-3) or the load mechanism opening and closing indication shaft (3-5) rotates and pushes the load isolation locking grounding baffle (3-2) to slide horizontally to shield the isolation grounding operation shaft (12-3) and the load grounding operation shaft (13-3).

7. A high voltage switchgear cabinet, characterized in that: The invention comprises a cabinet (10); an intelligent control instrument room (1) is arranged on the top of the cabinet (10); an operation panel (4) and a cable compartment panel are arranged on the front of the cabinet (10); an operating mechanism room (6) and a closed air room (7) are arranged in sequence at the upper end of the cabinet (10); a cable compartment (5) is arranged at the lower end of the cabinet (10); an incoming bushing (8) is arranged at the upper end of the operating mechanism room (6); an outgoing bushing (9) is arranged at the lower end of the operating mechanism room (6); a high-voltage switchgear cabinet anti-misoperation mechanical interlocking device according to any one of claims 1 to 6 is arranged in the operating mechanism room (6); a main circuit switchgear and a standby circuit switchgear in the high-voltage switchgear cabinet anti-misoperation mechanical interlocking device are connected to the incoming bushing (8) and the outgoing bushing (9) respectively through a first copper busbar and a second copper busbar.

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