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CN-122026241-A - High protection type high-voltage switch cabinet

CN122026241ACN 122026241 ACN122026241 ACN 122026241ACN-122026241-A

Abstract

The invention relates to the technical field of high-voltage switch cabinets, in particular to a high-protection type high-voltage switch cabinet which comprises a cabinet body, wherein a radiating hole is formed in the cabinet body, and the high-voltage switch cabinet further comprises a dustproof mechanism, a first working state and a second working state, wherein the dustproof mechanism is arranged at the radiating hole and is in a normally-closed dustproof state, and the second working state is driven to enable the pressure release area of the radiating hole to be increased. The invention converts high pressure generated by faults in the cabinet into stable mechanical power, and the power drives the dustproof mechanism to act through the linkage mechanism, namely, the inner connecting rod firstly pulls the filter screen to shrink to primarily enlarge the pressure relief area, and then the outer connecting rod pushes the baffle to turn inwards to realize thorough maximization of the pressure relief area. Meanwhile, the dust on the filter screen is automatically removed in the pressure release process. The problem that the cabinet body bursts due to unsmooth pressure relief in the prior art is solved, and integration of efficient pressure relief, high-level protection and automatic maintenance is realized.

Inventors

  • LI HUI
  • FENG REN
  • LI YAN
  • LI CHUCHU
  • WANG RUIXIAN
  • ZHANG JIAYANG

Assignees

  • 陕西龙源佳泰电器设备有限公司

Dates

Publication Date
20260512
Application Date
20260330

Claims (10)

  1. 1. The utility model provides a high protection type high tension switchgear, includes the cabinet body (1), be equipped with louvre (2) on the cabinet body (1), its characterized in that still includes: the dustproof mechanism (3) is arranged at the radiating hole (2), and the dustproof mechanism (3) is provided with a first working state for enabling the radiating hole (2) to be in a normally closed dustproof state and a second working state for enabling the pressure release area of the radiating hole (2) to be increased under driving; The air pressure sensing mechanism (4) is arranged on the cabinet body (1) and is communicated with the interior of the cabinet body (1), and the air pressure sensing mechanism (4) is used for responding to the rising of the pressure in the cabinet body (1) and outputting mechanical power; The linkage mechanism is connected between the air pressure sensing mechanism (4) and the dustproof mechanism (3) and used for transmitting the mechanical power to the dustproof mechanism (3) to drive the dustproof mechanism to switch from the first working state to the second working state.
  2. 2. A high protection type high voltage switchgear according to claim 1, characterized in that the dust-proof mechanism (3) comprises: The baffle plate (302) is rotationally connected to the cabinet body (1) through a first rotating shaft assembly and is used for opening and closing the radiating holes (2); The filter screen component is movably arranged on the baffle plate (302); the linkage mechanism comprises a first driving assembly and a second driving assembly, wherein the first driving assembly is connected with the filter screen assembly and used for driving the filter screen assembly to move relative to the baffle plate (302) to primarily increase the pressure relief area, and the second driving assembly is connected with the first rotating shaft assembly and used for driving the baffle plate (302) to rotate to further increase the pressure relief area.
  3. 3. A high protection type high voltage switchgear according to claim 2, characterized in that the air pressure sensing mechanism (4) comprises: The air pipe (401) is fixed on the cabinet body (1), a containing cavity is arranged in the air pipe, the containing cavity is divided into a first cavity and a second cavity through an orifice (402), and the first cavity is communicated with the inside of the cabinet body; An inner piston rod (404) which is arranged in the first cavity in a sliding way and is driven by the pressure in the cabinet body; An outer piston rod (406) slidably disposed within the second chamber; Damping medium filled in the cavity; Wherein sliding of the inner piston rod (404) drives the outer piston rod (406) to delay sliding through damping action of a damping medium and an orifice (402).
  4. 4. A high protection type high voltage switch cabinet according to claim 3, wherein the first driving assembly comprises an inner connecting rod (405) in driving connection with an inner piston rod (404), the inner connecting rod (405) being connected with a filter screen assembly; The second driving assembly comprises an outer connecting rod (407) in transmission connection with an outer piston rod (406), and the outer connecting rod (407) is connected with the first rotating shaft assembly.
  5. 5. The high protection high voltage switchgear of claim 2 wherein the screen assembly comprises: A slide (307) slidably mounted within the baffle (302); The filter screen (303) is connected with the sliding seat (307) through an elastic reset mechanism, so that the filter screen (303) has a tendency of moving towards the inner side of the cabinet body; wherein the slide (307) is connected with the linkage mechanism.
  6. 6. The high protection type high voltage switch cabinet according to claim 5, further comprising a cleaning assembly, wherein the cleaning assembly comprises a cleaning brush (310) arranged on the baffle plate (302), and when the filter screen assembly is driven to move, the filter screen (303) and the cleaning brush (310) move relatively to realize cleaning.
  7. 7. The high protection high voltage switchgear of claim 6 wherein the cleaning assembly further comprises a vibration generating mechanism comprising: a rack (311) provided on the slider (307); at least one gear transmission unit arranged on the baffle plate (302) and positioned on the movement path of the rack (311), wherein the gear transmission unit comprises a gear (313) and a knocking hammer (314) coaxially arranged with the gear (313); wherein the movement of the slide (307) drives the striking hammer (314) to store energy through the engagement of the rack (311) and the gear (313) and releases energy to strike the filter screen (303) when disengaged.
  8. 8. The high-protection high-voltage switch cabinet according to claim 7, wherein the gear transmission unit further comprises a limit release mechanism, the limit release mechanism comprises a stop block (315) arranged on the knocking hammer (314) and a limit block (317) for limiting the stop block (315), and the engagement of the rack (311) and the gear (313) drives the stop block (315) to overcome the resistance of the limit block (317) and overcome the limit of the limit block to release the knocking hammer (314).
  9. 9. A high protection type high voltage switchgear according to claim 8, characterized in that the toothing of the gear wheel (313) is arranged intermittently over part of its circumference.
  10. 10. The high protection type high voltage switch cabinet according to claim 2, wherein the first rotating shaft assembly comprises a rotating disc (305) fixedly connected with a baffle plate (302), and the second driving assembly is hinged with the non-center of the rotating disc (305).

Description

High protection type high-voltage switch cabinet Technical Field The invention relates to the technical field of high-voltage switch cabinets, in particular to a high-protection type high-voltage switch cabinet. Background The high-voltage switch cabinet is used as a key device for controlling, protecting, measuring and distributing electric energy in an electric power system, and the safe and stable operation of the high-voltage switch cabinet is important. However, when a fault such as a short circuit occurs in the inside of the cabinet, an arc having an extremely high temperature is generated. The tremendous energy released by the arc in the instant causes the air in the cabinet to expand rapidly by heating, resulting in a sudden rise in internal pressure, creating a high pressure environment. The high-pressure environment can bring serious potential safety hazards, firstly, the excessive pressure can directly lead to deformation or even bursting of a cabinet body of the switch cabinet to cause permanent damage to equipment, secondly, electrical elements (such as insulating materials, relay contacts and the like) in the cabinet can be damaged under high-pressure impact to cause functional failure, and most importantly, the high-pressure environment directly threatens the personal safety of operation and maintenance personnel. To alleviate this problem, the prior art has generally employed pressure relief devices, such as pressure relief covers or membranes, on the switchgear that open to release high pressure gas when the internal pressure exceeds a set value. In addition, many designs double the heat dissipation holes as pressure relief channels for simplifying the structure and maintaining the tightness of the cabinet. The heat dissipation holes play a role in heat dissipation in daily operation, dust prevention and insect prevention are achieved by additionally installing the filter screen or the shutter, and the protection level and the service life of the equipment under severe environments are improved. However, the integrated design has the obvious defects that the opening area of the heat dissipation holes is small, the filter screen or the shutter increases ventilation resistance, and when arc faults and sudden pressure rise occur in the cabinet, the gas outflow speed is far lower than the pressure propagation and accumulation speed, so that pressure relief is not smooth. The high-pressure gas can not be discharged rapidly, so that the pressure in the cabinet is accumulated in a very short time to form an excessively high peak value, the mechanical strength limit of the cabinet plate, the door lock and the hinge is easily exceeded, uncontrollable deformation or tearing of the cabinet is caused, and the pressure is not released orderly, so that the equipment damage risk and the safety accident probability are increased. Therefore, a high-protection type high-voltage switch cabinet is proposed to solve the above-mentioned problems. Disclosure of Invention The invention aims to provide a high-protection type high-voltage switch cabinet, which solves the problem of unsmooth pressure relief caused by insufficient pressure relief area of a radiating hole when the high-voltage switch cabinet in the prior art fails. The quick and orderly pressure relief is realized, so that the cabinet structure and the personnel safety are effectively protected. In order to achieve the above purpose, the invention provides the following technical scheme that the high-protection type high-voltage switch cabinet comprises a cabinet body, wherein the cabinet body is provided with a heat dissipation hole, and the high-protection type high-voltage switch cabinet further comprises: The dustproof mechanism is arranged at the radiating hole and is provided with a first working state which enables the radiating hole to be in a normally closed dustproof state and a second working state which enables the pressure relief area of the radiating hole to be increased under driving; the air pressure sensing mechanism is arranged on the cabinet body and communicated with the interior of the cabinet body, and is used for responding to the rising of the pressure in the interior of the cabinet body and outputting mechanical power; And the linkage mechanism is connected between the air pressure sensing mechanism and the dustproof mechanism and is used for transmitting the mechanical power to the dustproof mechanism and driving the dustproof mechanism to switch from the first working state to the second working state. Further, the dust prevention mechanism includes: The baffle is rotationally connected to the cabinet body through a first rotating shaft assembly and used for opening and closing the radiating holes; the filter screen component is movably arranged on the baffle; The linkage mechanism comprises a first driving assembly and a second driving assembly, wherein the first driving assembly is connected with the filter screen assembly