A high-voltage switchgear with an interlocking device

Abstract

The present invention discloses a high-voltage power distribution cabinet with an interlocking device, comprising a cabinet body and a power switch arranged in the cabinet body. A driving assembly is provided on the top of the cabinet body, and the driving assembly drives the cabinet door to be opened. The pull rope drives the control block and the transmission block to move downward. When the transmission block contacts the proximity switch, the proximity switch controls the power switch to cut off the power through a microcontroller. The opening and closing of the cabinet door can synchronously control the power switch. Opening the cabinet door cuts off the power supply to the electrical cabinet, thereby ensuring the safety of maintenance personnel during maintenance and avoiding the risk of electric shock caused by irregular maintenance or misoperation.

Description

Technical Field

[0001] The present invention relates to the field of high-voltage power distribution cabinets, and in particular to a high-voltage power distribution cabinet with an interlocking device. Background Art

[0002] High-voltage distribution cabinets are distribution equipment used for power distribution, control, metering, and cable connection in power supply systems. The voltage level is generally between 3.6KV and 550KV. Due to the high voltage and difficulty in maintenance of high-voltage distribution cabinets, the problem of high-voltage distribution cabinet power inspection has been a problem that has plagued power safety production for many years. The maintenance process has the following safety risks: (1) The existing fully enclosed five-protection switch cabinets cannot meet the requirements of the safety regulations of "testing the power first, then hanging the grounding wire". Because when performing power outage work, it is necessary to verify that the equipment has no voltage before closing the grounding switch. However, according to the normal operation method of the fully enclosed switch cabinet, it is impossible to use a portable high-voltage tester to test the equipment. Forcibly unlocking and opening the switch cabinet door for power testing poses a greater safety hazard; (2) During regular maintenance, the high-voltage power supply must be cut off first, and then the high-voltage distribution cabinet door is opened. However, during actual maintenance operations, because the keys are managed by the maintenance personnel themselves, it is easy to make irregular operations, that is, opening the cabinet door for maintenance without cutting off the high-voltage power supply. (3) For the convenience of work, the keys of most high-voltage distribution cabinets are universal. One key can open the door locks of multiple distribution cabinets, and the power supplies of multiple distribution cabinets are connected. When two or more maintenance personnel are simultaneously carrying out maintenance work on the high-voltage distribution cabinet, if one person is doing maintenance and the other person has finished maintenance and connected the high-voltage power supply, it will cause an electric shock accident. (4) When emergency maintenance is required, violent dismantling of the fully enclosed switch cabinet will damage the electrical cables in the distribution cabinet, and the arc flash of the high-voltage power supply that is not disconnected in time will not only burn the eyes, but also easily cause leakage and electric shock accidents. The violent dismantling will cause the cabinet to vibrate violently, which will cause small parts in the high-voltage distribution cabinet to fall, affecting the safety and reliability of the distribution cabinet's power use.

[0003] Safety is the foundation of power production, and prevention is the key to ensuring safe production. In current power production safety work, electric shock accidents and misoperation accidents remain the two major factors threatening safe production. Therefore, it is urgent to continuously improve and enhance existing power facilities to prevent electric shock and misoperation accidents. Summary of the Invention

[0004] The present invention provides a high-voltage distribution cabinet with an interlocking device, which aims to solve the problem that the high voltage of the high-voltage distribution cabinet may cause electric shock risks due to improper maintenance or misoperation by personnel.

[0005] The present invention relates to a high-voltage power distribution cabinet with an interlocking device, comprising a cabinet body and a power switch arranged in the cabinet body, a low-voltage power switch being connected to the outside of the cabinet body, a double-opening cabinet door being symmetrically provided on one side of the cabinet body, a driving assembly being provided on the top of the cabinet body, a control frame being provided at the connection between the cabinet door and the cabinet body, an opening being provided on the lower side of the control frame, and a pressure sensor being provided in the opening; a control block being slidingly provided on one side of the upper part of the opening on the control frame, one end of the control block being connected to the bottom of the cabinet door by a pull rope, and the other end being connected to one end of a connecting rod, and the other end of the connecting rod being connected to a transmission block, the transmission block and the top of the cabinet body being connected by a second elastic member, and an electric telescopic rod being provided in the transmission block; a proximity switch being provided on the top of the control frame; a positioning assembly being provided on the control block, the positioning assembly comprising a first elastic member, and a hemispherical protrusion being provided on the first elastic member near the opening and adapted to the inside of the opening; the pressure sensor, the proximity switch and the low-voltage power switch being electrically connected to the input end of a microcontroller respectively, and the output end of the microcontroller being electrically connected to the indicator light, the electric telescopic rod, the power switch and the driving assembly.

[0006] Preferably, the driving assembly includes a driving motor fixedly connected to the top of one side of the cabinet body, and the output end of the driving motor is provided with a driving threaded rod, which consists of four sections of threaded rods of equal length. The center position of the driving threaded rod is fixed to the top of the cabinet body through a threaded rod fixing block, and the thread directions of the two sections of threaded rods on the same side of the threaded rod fixing block are opposite; the bottom of the driving threaded rod is symmetrically arranged with the threaded rod fixing block as the center, and the push-pull assemblies on both sides include a first slider and a second slider symmetrically arranged, and the first slider and the second slider slide horizontally on the two sections of threaded rods with opposite thread directions respectively, the bottom of the first slider is rotatably connected to one end of the first support rod, and the bottom of the second slider is rotatably connected to one end of the second support rod, and the other ends of the first support rod and the second support rod are hinged to each other, and the hinge is connected to the top of the cabinet door through a foldable connecting rod.

[0007] Preferably, a guide wheel is provided inside the cabinet below the control frame, the guide wheel abuts against the pull rope, and the cabinet door is hinged to the cabinet.

[0008] Preferably, the foldable connecting rod is a four-bar connecting rod structure.

[0009] Preferably, the first elastic member and the second elastic member are both springs, and the springs always maintain a preload force.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. The high-voltage distribution cabinet provided by the present invention has an interlocking device. A driving assembly is provided on the top of the cabinet body. The driving assembly drives the cabinet door to open, and the pull rope drives the control block and the transmission block to move downward. When the transmission block contacts the proximity switch, the proximity switch controls the power switch to cut off the power through the microcontroller. The opening and closing of the cabinet door can synchronously control the power switch. Opening the cabinet door cuts off the power supply to the electrical cabinet, ensuring the safety of maintenance personnel during maintenance and avoiding the risk of electric shock caused by irregular maintenance or misoperation.

[0012] 2. The present invention provides a high-voltage power distribution cabinet with an interlocking device. The hemispherical protrusion of the positioning assembly on the transmission block enters the opening and contacts the pressure sensor. When the pressure sensor detects pressure, the indicator light is controlled by the microcontroller to light up, clearly feeding back the power outage of the power distribution cabinet to the operator. At the same time, the pressure sensor feeds back the signal to the microcontroller, and the microcontroller controls the electric telescopic rod to pop out, which again makes it convenient for people to clearly understand the power outage status of the electrical cabinet. The dual display fully guarantees the safety of electricity use.

[0013] 3. The high-voltage power distribution cabinet with an interlocking device provided by the present invention utilizes a driving motor to drive the threaded rod to rotate, and the driving threaded rod drives the first slider and the second slider to move in opposite directions. The first slider and the second slider then drive the first support rod and the second support rod to move. At the same time, the force at the hinge of the first support rod and the second support rod is transmitted to the foldable connecting rod, and the foldable connecting rod is straightened to open the cabinet door. The foldable connecting rod can also support and fix the cabinet door during the maintenance process, thereby ensuring the stability of the cabinet door during maintenance.

[0014] 4. The high-voltage distribution cabinet with an interlocking device provided by the present invention has a low-voltage power supply that feeds back the opening and closing signal to the microcontroller. The microcontroller controls the rotation of the drive motor and starts the power switch. The cabinet door is automatically opened by the drive motor, avoiding the risk of electric shock or arc exposure when personnel manually open the cabinet door. It is safe and convenient. Moreover, the low-voltage power supply can be a low-voltage battery pack or an external temporary DC power supply. In case of emergency power outage, the high-voltage distribution cabinet door can also be opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the internal structure of a high-voltage power distribution cabinet with an interlocking device according to the present invention;

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is a schematic diagram of the cabinet top structure of the present invention;

[0018] Figure 4 It is a schematic diagram of the transmission block structure of the present invention;

[0019] Figure 5 A circuit connection diagram of the present invention;

[0020] In the figure: 1-cabinet, 2-power switch, 3-cabinet door, 4-control frame, 5-control block, 6-pull rope, 7-guide wheel, 8-positioning assembly, 9-first elastic member, 10-hemispherical protrusion, 11-opening, 12-pressure sensor, 13-indicator light, 14-connecting rod, 15-transmission block, 16-proximity switch, 17-second elastic member, 18-electric telescopic rod, 19-drive motor, 20-first slider, 21-drive threaded rod, 22-first support rod, 23-second support rod, 24-threaded rod fixing block, 25-second slider, 26-foldable connecting rod. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings:

[0022] like Figure 1-5As shown, the present invention is a high-voltage power distribution cabinet with an interlocking device, including a cabinet body 1 and a power switch 2 arranged in the cabinet body 1, a low-voltage power switch is connected to the outside of the cabinet body 1, a double-opening cabinet door 3 is symmetrically provided on one side of the cabinet body 1, and a driving assembly is provided on the top of the cabinet body 1. The driving assembly includes a driving motor 19 fixed to the top of one side of the cabinet body 1, and a driving threaded rod 21 is provided at the output end of the driving motor 19. The driving threaded rod 21 is composed of four sections of threaded rods of equal length. The center position of the driving threaded rod 21 is fixed to the top of the cabinet body 1 by a threaded rod fixing block 24. The thread directions of the two sections of threaded rods on the same side of the threaded rod fixing block 24 are opposite; the bottom of the driving threaded rod 21 is centered on the threaded rod fixing block 24. The push-pull components are symmetrically arranged, and the push-pull components on both sides include a symmetrically arranged first slider 20 and a second slider 25. The first slider 20 and the second slider 25 slide horizontally on two threaded rods with opposite thread directions respectively. The bottom of the first slider 20 is rotatably connected to one end of the first support rod 22, and the bottom of the second slider 25 is rotatably connected to one end of the second support rod 23. The other ends of the first support rod 22 and the second support rod 23 are hinged to each other, and the hinge is connected to the top of the cabinet door 3 through a foldable connecting rod 26. The foldable connecting rod 26 is a four-bar structure; the drive motor 19 is electrically connected to the output end of the microcontroller, and the input end of the microcontroller is electrically connected to the low-voltage power supply provided on the outside of the cabinet body 1. A control frame 4 is provided at the hinge between the cabinet door 3 and the cabinet body 1, and an opening 11 is provided on the lower side of the control frame 4, and a pressure sensor 12 is provided in the opening 11; a control block 5 is slidably provided on one side of the upper part of the opening 11 on the control frame 4, one end of the control block 5 is connected to the bottom of the cabinet door 3 through a pull rope 6, and the other end is connected to one end of the connecting rod 14, and the other end of the connecting rod 14 is connected to the transmission block 15, and the transmission block 15 is connected to the top of the cabinet body 1 through a spring, and the spring always maintains a preload, and an electric telescopic rod 18 is provided in the transmission block 15; a guide wheel 7 is provided on the inner side of the cabinet body 1 below the control frame 4, and the guide wheel 7 abuts against the pull rope 6; a proximity switch 16 is provided on the top of the control frame 4; a positioning assembly 8 is provided on the control block 5, and the positioning assembly 8 includes a spring, which always maintains a preload, and a hemispherical protrusion 10 that is adapted to the inside of the opening 11 is provided on the side of the spring close to the opening 11. The pressure sensor 12 , the proximity switch 16 , and the low-voltage power switch are electrically connected to the input end of the microcontroller respectively, and the output end of the microcontroller is electrically connected to the indicator light 13 , the electric telescopic rod 18 , the power switch 2 , and the drive motor 19 .

[0023] When inspecting the high-voltage distribution cabinet, the maintenance personnel start the 12V low-voltage power switch on the outside of the cabinet 1 (the 12V low-voltage power supply on the outside of the cabinet is a low-voltage battery pack or an external temporary DC power supply, all of which are prior art and are not shown in detail in the text). After receiving the signal, the microcontroller controls the drive motor 19 to rotate, and the drive threaded rod 21 rotates under the drive of the drive motor 19. The first slider 20 and the second slider 25 move toward the middle of the drive threaded rod 21 at the same time. At the same time, the force at the hinge of the first support rod 22 and the second support rod 23 is transmitted to the foldable connecting rod 26, and the foldable connecting rod 26 extends. The cabinet door 3 is opened directly. When the cabinet door 3 is opened, the pull cord 6 is forced to drive the control block 5 to slide downward until the cabinet door 3 is fully opened. The hemispherical protrusion 10 on the positioning assembly 8 receives the preload force of the spring and pushes the hemispherical protrusion 10 into the opening 11, triggering the pressure sensor 12 at the same time. When the pressure sensor 12 detects pressure, it controls the indicator light 13 to light up through the microcontroller, clearly feeding back the power outage status of the distribution cabinet to the operator. At the same time, the electric telescopic rod 18 is popped out under the control of the microcontroller, making it easier for people to know the power outage status of the electrical cabinet. The dual display fully guarantees the safety of electricity use. After the inspection is completed, the maintenance personnel activate the 12V low-voltage power switch on the outside of the cabinet body 1. After the drive motor 19 is energized, it drives the threaded rod 21 to rotate in the opposite direction, causing the control block 5 to slide upward and the hemispherical protrusion 10 to slide out. When the pressure sensor 12 detects the disappearance of pressure, it controls the indicator light 13 to go out through the microcontroller. At the same time, the electric telescopic rod 18 retracts, and the foldable connecting rod 26 folds and closes the cabinet door 3 to its initial position, completing the inspection of the high-voltage distribution cabinet.

Claims

1. A high-voltage power distribution cabinet with an interlocking device, comprising a cabinet body (1) and a 12V power switch (2) arranged in the cabinet body (1), the outer side of the cabinet body (1) is connected to a 12V low-voltage power supply, the 12V low-voltage power supply is a low-voltage battery pack or an external temporary DC power supply, a double-opening cabinet door (3) is symmetrically provided on one side of the cabinet body (1), and a drive component is provided on the top of the cabinet body (1), characterized in that: A control frame (4) is provided at the connection between the cabinet door (3) and the cabinet body (1), and an opening (11) is provided on the lower side of the control frame (4), and a pressure sensor (12) is provided in the opening (11); a control block (5) is slidably provided on one side of the upper part of the opening (11) of the control frame (4), one end of the control block (5) is connected to the bottom of the cabinet door (3) through a pull rope (6), and the other end is connected to one end of a connecting rod (14), and the other end of the connecting rod (14) is connected to a transmission block (15), and the transmission block (15) is connected to the top of the cabinet body (1) through a second elastic member (17), and an electric telescopic rod (18) is provided in the transmission block (15); a proximity switch (16) is provided on the top of the control frame (4); a positioning assembly (8) is provided on the control block (5), and the positioning assembly (8) includes a first elastic member (9) A hemispherical protrusion (10) adapted to the inside of the opening (11) is provided on the first elastic member (9) on one side close to the opening (11); the first elastic member (9) and the second elastic member (17) are both springs, and the springs always maintain a preload; the pressure sensor (12), the proximity switch (16), and the low-voltage power switch are electrically connected to the input end of the microcontroller, respectively; the output end of the microcontroller is electrically connected to the indicator light (13), the electric telescopic rod (18), the power switch (2), and the drive component; when the pressure sensor (12) detects pressure, the electric telescopic rod (18) is controlled by the microcontroller to pop out and the indicator light (13) is turned on; when the pressure sensor (12) detects that the pressure disappears, the electric telescopic rod (18) is controlled by the microcontroller to retract and the indicator light (13) is turned off.

2. A high-voltage distribution cabinet with an interlocking device according to claim 1, characterized in that: The driving assembly comprises a driving motor (19) fixed to the top of one side of the cabinet (1), and a driving threaded rod (21) is provided at the output end of the driving motor (19). The driving threaded rod (21) is composed of four sections of threaded rods of equal length. The center position of the driving threaded rod (21) is fixed to the top of the cabinet (1) through a threaded rod fixing block (24). The thread directions of the two sections of threaded rods on the same side of the threaded rod fixing block (24) are opposite. The bottom of the driving threaded rod (21) is symmetrically provided with a push-pull assembly with the threaded rod fixing block (24) as the center. The side push-pull assembly comprises a first slider (20) and a second slider (25) which are symmetrically arranged. The first slider (20) and the second slider (25) slide horizontally on two threaded rods with opposite thread directions. The bottom of the first slider (20) is rotatably connected to one end of the first support rod (22). The bottom of the second slider (25) is rotatably connected to one end of the second support rod (23). The other ends of the first support rod (22) and the second support rod (23) are hinged to each other. The hinge is connected to the top of the cabinet door (3) through a foldable connecting rod (26).

3. A high-voltage distribution cabinet with an interlocking device according to claim 1, characterized in that: A guide wheel (7) is provided on the inner side of the cabinet body (1) below the control frame (4), the guide wheel (7) abuts against the pull rope (6), and the cabinet door (3) is hinged to the cabinet body (1).

4. A high-voltage distribution cabinet with an interlocking device according to claim 2, characterized in that: The foldable connecting rod (26) is a four-link structure.

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