A pressure relief protection mechanism and switch cabinet

Abstract

The present invention discloses a pressure relief protection mechanism and a switch cabinet. The pressure relief protection mechanism comprises a group of first pressure relief protection devices and two groups of second pressure relief protection devices arranged on the top plate of the switch cabinet. When the pressure in the switch cabinet is not particularly large, only the first pressure relief protection device plays a pressure relief role, the internal high air pressure pushes the movable plate outward, and the gas is released from the first pressure relief port. When the position detection device detects that the movable plate is pushed to the middle position of the first pressure relief port or to the outer end, the locking plate of the locking mechanism rotates, and the pressure relief plate can be pushed open at any time, and the first pressure relief protection device and the second pressure relief protection device play a pressure relief protection role at the same time. When the position detection device detects that the movable plate returns to the inner half of the first pressure relief port, the locking plate of the locking mechanism rotates, and the pressure relief plate is locked.

Description

Technical Field

[0001] The present invention relates to the technical field of switch cabinets, and in particular to a pressure relief protection mechanism and a switch cabinet. Background Art

[0002] The switch cabinet is an electrical equipment. The components in the switch cabinet mainly include circuit breakers, disconnectors, load switches, operating mechanisms, mutual inductors and various protective devices. The main function of the switch cabinet is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and power conversion in the power system. In the operation of the switch cabinet, internal fault arc accidents often occur due to insulation aging, misoperation, foreign matter and overvoltage. The arc combustion releases huge energy in a short time, causing the gas inside the cabinet to expand and the pressure to increase suddenly, which can cause the cabinet to burst under strong pressure and even cause a fire. The existing switch cabinet is provided with a pressure relief plate. When the short circuit inside the switch cabinet generates high-temperature and high-pressure gas, the pressure relief plate pops open and releases the high-temperature and high-pressure gas into the switch cabinet to prevent the switch cabinet from bursting. The pressure relief plate is fixed with a metal screw at one end and a nylon screw at the other end. When the strength of the nylon bolt is too high, the pressure relief plate cannot be opened immediately, which easily causes pressure accumulation and has a greater impact on the cabinet. Summary of the invention

[0003] The purpose of the present invention is to provide a pressure relief protection mechanism and a switch cabinet to address the deficiencies of the prior art.

[0004] The technical solution of the present invention to solve the above problem is: a pressure relief protection mechanism, comprising a set of first pressure relief protection devices and two sets of second pressure relief protection devices arranged on the top plate of the switch cabinet;

[0005] The first pressure relief protection device comprises a T-shaped pressure relief cover connected to the top plate by bolts, a T-shaped pressure relief channel is arranged in the T-shaped pressure relief cover, a first pressure relief window connected to the T-shaped pressure relief channel is arranged on the top plate, two movable plates are arranged in the T-shaped pressure relief channel, the inner end surface of the movable plate is arranged in contact with the sealing plate when the movable plate is at the innermost end, the sealing plate is a rectangular frame arranged in the T-shaped pressure relief channel, a sealing ring is arranged on the inner end surface of the movable plate, the two movable plates are respectively slidably connected to the two ends of the T-shaped pressure relief channel through a sliding connection mechanism, and the lower walls at the two ends of the T-shaped pressure relief channel are respectively provided with a first pressure relief port; a reset plate is fixedly provided in the middle of the upper wall of the T-shaped pressure relief channel, and the reset plate is connected to the movable plates at the two ends through a reset telescopic device;

[0006] The second pressure relief protection device includes a rectangular pressure relief cover connected to the top plate by bolts, two pressure relief plates respectively hingedly connected to the top plate, and a locking mechanism. A second pressure relief window is provided on the top plate below each pressure relief plate, a partition is provided between the two second pressure relief windows, the two pressure relief plates are symmetrically installed about the partition, and the locking mechanism is rotatably installed on the partition.

[0007] Furthermore, the sliding connection mechanism includes four sliding tracks, four pulleys connected to the outer end surface of the movable plate, the four sliding tracks are respectively arranged at both ends of the upper wall and the lower wall of the T-shaped pressure relief channel, and the four pulleys are respectively slidably arranged in the four sliding tracks, wherein the two sliding tracks on the lower wall of the T-shaped pressure relief channel are respectively arranged at both ends of the first pressure relief port.

[0008] Furthermore, the resetting and telescopic device comprises a telescopic rod and a resetting spring sleeved on the outside of the telescopic rod, and both ends of the telescopic rod and both ends of the resetting spring are fixedly connected to the movable plate and the resetting plate.

[0009] Furthermore, the locking mechanism includes a locking plate rotatably connected to the center of the partition through a rotating shaft, a driven gear coaxially connected to the rotating shaft, a driving electric push rod fixed on the partition, and a driving rack connected to the telescopic end of the driving electric push rod and meshing with the driven gear.

[0010] Furthermore, the cross-section of the locking plate is an isosceles trapezoid.

[0011] Furthermore, the pressure relief protection mechanism also includes a controller, and the first pressure relief protection device also includes two groups of position detection devices, the two groups of position detection devices are connected to the controller, and the locking mechanism is controlled by the controller.

[0012] Furthermore, two groups of position detection devices are respectively arranged at both ends of the T-shaped pressure relief channel, and each group of position detection devices includes a transmitting unit fixedly connected to the center of the inner end surface of the movable plate, and a receiving unit fixedly connected to the upper wall of the T-shaped pressure relief channel, and the receiving unit is arranged directly above the center of the first pressure relief port.

[0013] Furthermore, two groups of second pressure relief protection devices are respectively arranged on both sides of the first pressure relief protection device.

[0014] A switch cabinet comprises a cabinet body, wherein the pressure relief protection mechanism is arranged on the top plate of the cabinet body.

[0015] The present invention has the beneficial effects:

[0016] The present invention provides a pressure relief protection mechanism and a switch cabinet. When the pressure inside the switch cabinet is not particularly large, only the first pressure relief protection device plays a pressure relief role, the internal high air pressure pushes the movable plate outward, and the gas is released from the first pressure relief port; when the position detection device detects that the movable plate is pushed to the middle position of the first pressure relief port or to the outer end, the locking plate of the locking mechanism rotates, and the pressure relief plate can be pushed open at any time, and the first pressure relief protection device and the second pressure relief protection device play a pressure relief protection role at the same time; when the position detection device detects that the movable plate returns to the inner half of the first pressure relief port, the locking plate of the locking mechanism rotates, and the pressure relief plate is locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the pressure relief protection mechanism;

[0018] Figure 2 is a structural schematic diagram of a first pressure relief protection device;

[0019] Figure 3 is a structural schematic diagram of a second pressure relief protection device;

[0020] Figure 4 It is a structural schematic diagram of the upper wall of the T-type pressure relief cover;

[0021] Figure 5 is a structural schematic diagram of a locking mechanism;

[0022] Figure 6 is the electrical schematic diagram of the controller;

[0023] In the figure: 1-top plate, 2-first pressure relief protection device, 3-second pressure relief protection device, 4-T-type pressure relief cover, 5-T-type pressure relief channel, 6-first pressure relief window, 7-movable plate, 8-sealing plate, 9-sealing ring, 10-first pressure relief port, 11-reset plate, 12-rectangular pressure relief cover, 13-pressure relief plate, 14-second pressure relief window, 15-partition, 16-sliding track, 17-pulley, 18-telescopic rod, 19-reset spring, 20-locking plate, 21-rotating shaft, 22-driven gear, 23-driving electric push rod, 24-driving rack, 25-controller, 26-transmitting unit, 27-receiving unit. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0025] like Figure 1 As shown, a switch cabinet comprises a cabinet body, wherein a pressure relief protection mechanism is provided on a top plate 1 of the cabinet body, and the pressure relief protection mechanism comprises a group of first pressure relief protection devices 2 and two groups of second pressure relief protection devices 3 arranged on the top plate 1 of the switch cabinet; the two groups of second pressure relief protection devices 3 are respectively arranged on both sides of the first pressure relief protection device 2;

[0026] like Figure 2 , 4As shown, the first pressure relief protection device 2 includes a T-shaped pressure relief cover 4 connected to the top plate 1 by bolts, a T-shaped pressure relief channel 5 is provided in the T-shaped pressure relief cover 4, a first pressure relief window 6 connected to the T-shaped pressure relief channel 5 is provided on the top plate 1, two movable plates 7 are provided in the T-shaped pressure relief channel 5, and the inner end surface of the movable plate 7 is arranged in contact with the sealing plate 8 when the movable plate 7 is at the innermost end. The sealing plate 8 is a rectangular frame arranged in the T-shaped pressure relief channel 5, and a sealing ring 9 is provided on the inner end surface of the movable plate 7. The two movable plates 7 are slidably connected to the two ends of the T-shaped pressure relief channel 5 through a sliding connection mechanism, and the lower walls at the two ends of the T-shaped pressure relief channel 5 are respectively provided with a first pressure relief port 10; the sliding connection mechanism includes four sliding rails 16, four pulleys 17 connected to the outer end surface of the movable plate 7, four sliding tracks 16 are respectively arranged at both ends of the upper wall and the lower wall of the T-shaped pressure relief channel 5, and the four pulleys 17 are respectively slidably arranged in the four sliding tracks 16, wherein the two sliding tracks 16 on the lower wall of the T-shaped pressure relief channel 5 are respectively arranged at both ends of the first pressure relief port 10, and a reset plate 11 is fixedly arranged in the middle of the upper wall of the T-shaped pressure relief channel 5, and the reset plate 11 is connected to the movable plates 7 at both ends through a reset telescopic device, and the reset telescopic device includes a telescopic rod 18 and a reset spring 19 sleeved on the outside of the telescopic rod 18, and the two ends of the telescopic rod 18 and the two ends of the reset spring 19 are fixedly connected to the movable plate 7 and the reset plate 11;

[0027] like Figure 3 , 5 As shown, the second pressure relief protection device 3 includes a rectangular pressure relief cover 12 connected to the top plate 1 by bolts, two pressure relief plates 13 respectively hingedly connected to the top plate 1, and a locking mechanism, a second pressure relief window 14 is provided on the top plate 1 below each pressure relief plate 13, a partition 15 is provided between the two second pressure relief windows 14, the two pressure relief plates 13 are symmetrically installed about the partition 15, and the locking mechanism is rotatably installed on the partition 15, and the locking mechanism includes a locking plate 20 rotatably connected to the center of the partition 15 through a rotating shaft 21, a driven gear 22 coaxially connected to the rotating shaft 21, a driving electric push rod 23 fixed on the partition 15, and a driving rack 24 connected to the telescopic end of the driving electric push rod 23 and meshing with the driven gear 22, and the cross section of the locking plate 20 is an isosceles trapezoid;

[0028] like Figure 6As shown, the pressure relief protection mechanism also includes a controller 25, which is arranged outside and can be installed on a wall or placed on the ground. Two sets of position detection devices and two driving electric push rods 23 are respectively connected to the controller 25. The first pressure relief protection device 2 also includes two sets of position detection devices, which are respectively arranged at both ends of the T-shaped pressure relief channel 5. Each set of position detection devices includes a transmitting unit 26 fixedly connected to the center of the inner end surface of the movable plate 7, and a receiving unit 27 fixedly connected to the upper wall of the T-shaped pressure relief channel 5. The receiving unit 27 is arranged directly above the center of the first pressure relief port 10.

[0029] The working principle of the present invention is as follows: when the pressure in the switch cabinet is not particularly high, only the first pressure relief protection device 2 plays a role in pressure relief, the internal high pressure pushes the movable plate 7 outward, and the gas is released from the first pressure relief port 10; when the position detection device detects that the movable plate 7 is pushed to the middle position of the first pressure relief port 10 or the outer end, the locking plate of the locking mechanism rotates, and the pressure relief plate 13 can be pushed open at any time, and the first pressure relief protection device 2 and the second pressure relief protection device 3 play a role in pressure relief protection at the same time; when the position detection device detects that the movable plate 7 returns to the inner half of the first pressure relief port 10, the locking plate of the locking mechanism rotates, and the pressure relief plate 13 is locked;

[0030] The two groups of position detection units respectively control the operation of one of the driving electric push rods 23. When only one side of the position detection device detects that the movable plate 7 is pushed to the middle position or the outer end of the first pressure relief port 10, only one second pressure relief protection device 3 is activated. If both sides detect it at the same time, the two second pressure relief protection devices 3 are activated and opened at the same time.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A pressure relief protection mechanism, characterized in that: The invention comprises a first pressure relief protection device (2) and two second pressure relief protection devices (3) arranged on a top plate (1) of a switch cabinet; the first pressure relief protection device (2) comprises a T-shaped pressure relief cover (4) connected to the top plate (1) by bolts; a T-shaped pressure relief channel (5) is arranged inside the T-shaped pressure relief cover (4); a first pressure relief window (6) connected to the T-shaped pressure relief channel (5) is arranged on the top plate (1); two movable plates (7) are arranged inside the T-shaped pressure relief channel (5); when the movable plate (7) is at the innermost end, the inner end surface of the movable plate (7) is arranged in contact with a sealing plate (8); the sealing plate (8) is a rectangular frame arranged in the T-shaped pressure relief channel (5); a sealing ring (9) is arranged on the inner end surface of the movable plate (7); the two movable plates (7) are respectively slidably connected to the T-shaped pressure relief channel (5) by a sliding connection mechanism. At both ends of the channel (5), first pressure relief ports (10) are respectively provided on the lower walls of the two ends of the T-shaped pressure relief channel (5); a reset plate (11) is fixedly provided in the middle of the upper wall of the T-shaped pressure relief channel (5), and the reset plate (11) is connected to the movable plates (7) at both ends through reset telescopic devices; the second pressure relief protection device (3) comprises a rectangular pressure relief cover (12) connected to the top plate (1) by bolts, two pressure relief plates (13) respectively hingedly connected to the top plate (1), and a locking mechanism, a second pressure relief window (14) is provided on the top plate (1) below each pressure relief plate (13), a partition (15) is provided between the two second pressure relief windows (14), the two pressure relief plates (13) are symmetrically installed about the partition (15), and the locking mechanism is rotatably installed on the partition (15); The sliding connection mechanism comprises four sliding rails (16) connected to four pulleys (17) on the outer end surface of the movable plate (7), the four sliding rails (16) are respectively arranged at both ends of the upper wall and the lower wall of the T-shaped pressure relief channel (5), and the four pulleys (17) are respectively slidably arranged in the four sliding rails (16), wherein the two sliding rails (16) on the lower wall of the T-shaped pressure relief channel (5) are respectively arranged at both ends of the first pressure relief port (10); The resetting and telescopic device comprises a telescopic rod (18) and a resetting spring (19) sleeved on the outside of the telescopic rod (18); two ends of the telescopic rod (18) and two ends of the resetting spring (19) are fixedly connected to the movable plate (7) and the resetting plate (11); The locking mechanism comprises a locking plate (20) rotatably connected to the center of the partition (15) via a rotating shaft (21), a driven gear (22) coaxially connected to the rotating shaft (21), a driving electric push rod (23) fixed to the partition (15), and a driving rack (24) connected to the telescopic end of the driving electric push rod (23) and meshing with the driven gear (22); the cross section of the locking plate (20) is an isosceles trapezoid.

2. A pressure relief protection mechanism according to claim 1, characterized in that: The pressure relief protection mechanism also includes a controller (25), and the first pressure relief protection device (2) also includes two sets of position detection devices, the two sets of position detection devices are connected to the controller (25), and the locking mechanism is controlled by the controller (25).

3. A pressure relief protection mechanism according to claim 1, characterized in that: Two sets of position detection devices are respectively arranged at both ends of the T-shaped pressure relief channel (5), and each set of position detection devices includes a transmitting unit (26) fixedly connected to the center of the inner end surface of the movable plate (7), and a receiving unit (27) fixedly connected to the upper wall of the T-shaped pressure relief channel (5), and the receiving unit (27) is arranged directly above the center of the first pressure relief port (10).

4. A pressure relief protection mechanism according to claim 1, characterized in that: Two groups of second pressure relief protection devices (3) are respectively arranged on both sides of the first pressure relief protection device (2).

5. A switch cabinet, characterized in that: It comprises a cabinet body, and a pressure relief protection mechanism as described in any one of claims 1 to 4 is arranged on a top plate (1) of the cabinet body.

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