High-voltage power distribution cabinet capable of automatically releasing voltage

Abstract

The utility model discloses a high-voltage power distribution cabinet capable of automatically releasing pressure, and relates to the technical field of high-voltage power distribution cabinets. Comprising a cabinet body, a first high-voltage chamber, a second high-voltage chamber and a third high-voltage chamber are sequentially arranged in the cabinet body from bottom to top, and hollow partition plates are arranged among the first high-voltage chamber, the second high-voltage chamber and the third high-voltage chamber. According to the high-voltage power distribution cabinet capable of automatically releasing the pressure, when an arc fault occurs in the cabinet, the air pressure in the high-pressure chamber is increased, and the left half pressure release plate and the right half pressure release plate are jacked open to be in an open state under the influence of expanded high-temperature and high-pressure gas, so that the high-pressure gas is allowed to be released outwards; the left half pressure relief plate and the right half pressure relief plate can be automatically closed under the action of the tension spring, repeated use can be achieved, consumables are saved, meanwhile, the adjacent high-voltage chambers are separated by the hollow partition plates, air buffer strips are arranged in the high-voltage chambers, the high-voltage chambers can be prevented from being penetrated and melted by fault arcs, and certain mechanical and thermal protection capacity is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage power distribution cabinets, in particular to a high-voltage power distribution cabinet with automatic pressure relief. Background Art

[0002] The high-voltage distribution cabinet is a very important part of the power system. It plays the role of regulating current and protecting electrical equipment. It is an indispensable part of the power system. The main function of the high-voltage distribution cabinet is to control and distribute electricity. In the power system, the high-voltage distribution cabinet is responsible for converting high-voltage power into electrical energy suitable for low-voltage equipment. At the same time, by distributing power, it realizes control of various parts of the power system. This control capability is very important. It can ensure the safe operation of the power system and protect power equipment from power fluctuations and power overloads.

[0003] During the operation of the high-voltage distribution cabinet, when a short circuit fault occurs in the primary circuit due to short circuit, insulation aging, or improper human operation, high-temperature and high-pressure gas will be generated instantly under high short-circuit current. In order to prevent the high-pressure gas from exploding and injuring people, a pressure relief port is generally provided on the high-voltage distribution cabinet body, and a pressure relief plate is provided on the pressure relief port. The general installation of the pressure relief plate is fixed at one end with a steel screw and the other end with a plastic screw.

[0004] When an arc occurs inside the switch cabinet, the air pressure in the high-voltage compartment increases. Since the cabinet door is tightly closed and reliably sealed, the high-pressure gas will break through the pressure release plate and be released. The pressure relief plate of this structure is disposable and needs to be repaired after use, which is wasteful and cumbersome to maintain. Utility Model Content

[0005] The utility model provides a high-voltage power distribution cabinet with automatic pressure relief to solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic pressure relief high-voltage power distribution cabinet, comprising a cabinet body, wherein a first high-voltage chamber, a second high-voltage chamber and a third high-voltage chamber are sequentially arranged inside the cabinet body from bottom to top, and hollow partitions are arranged between the first high-voltage chamber, the second high-voltage chamber and the third high-voltage chamber, and cabinet doors are installed on the front sides of the first high-voltage chamber, the second high-voltage chamber and the third high-voltage chamber through hinges, and pressure relief components are installed on the outer walls of the first high-voltage chamber, the second high-voltage chamber and the third high-voltage chamber, and the pressure relief components are mutually connected with the first high-voltage chamber, the second high-voltage chamber and the third high-voltage chamber respectively;

[0007] The pressure release assembly includes a steel trough body, a rotating shaft, a left half pressure relief plate, a right half pressure relief plate and a tension spring. Pads are provided on the left and right inner walls of the steel trough body. The rotating shaft is installed in the middle of the steel trough body. One end of the left half pressure relief plate and the right half pressure relief plate are respectively hinged on the rotating shaft. One end of the tension spring is respectively clamped on the left half pressure relief plate and the right half pressure relief plate, and the other end of the tension spring is clamped on the steel trough body.

[0008] Furthermore, heat dissipation holes are provided on the side walls of the first high-voltage chamber, the second high-voltage chamber and the third high-voltage chamber, and the heat dissipation holes are located on the left and right sides of the first high-voltage chamber, the second high-voltage chamber and the third high-voltage chamber.

[0009] Furthermore, a control instrument is embedded on the cabinet door of the first high-voltage chamber, and explosion-proof glass windows are installed on the cabinet doors of the second high-voltage chamber and the third high-voltage chamber.

[0010] Furthermore, a handle lock is installed on the cabinet door, and is locked to the first high-voltage chamber, the second high-voltage chamber and the third high-voltage chamber through the handle lock.

[0011] Furthermore, the pressure release components of the first high-pressure chamber and the second high-pressure chamber are arranged on the rear walls thereof, and the pressure release component of the third high-pressure chamber is arranged on the top thereof.

[0012] Furthermore, one end of the left half pressure relief plate and the right half pressure relief plate are both provided with an axial hole, and the rotating shaft is inserted into the axial hole.

[0013] Compared with the prior art, the utility model provides a high-voltage power distribution cabinet with automatic pressure relief, which has the following beneficial effects:

[0014] When an arc fault occurs in the high-voltage distribution cabinet with automatic pressure relief, the air pressure in the high-voltage chamber increases. Under the influence of the expanding high-temperature and high-pressure gas, the left and right half pressure relief plates will be pushed open and in an open state, allowing the high-pressure gas to be released outward. When the pressure in the high-voltage chamber is lower than the external pressure, the left and right half pressure relief plates will automatically close under the action of the tension spring, and can be used repeatedly to save consumables. At the same time, adjacent high-voltage chambers are separated by hollow partitions with air buffer zones inside to prevent the high-voltage chambers from being penetrated and melted by the fault arc, and have certain mechanical and thermal protection capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the cabinet of the utility model being opened;

[0017] Figure 3 It is a side view of the utility model;

[0018] Figure 4 It is a cross-sectional view of the pressure release assembly of the utility model.

[0019] In the figure: 1. cabinet body; 2. first high-pressure chamber; 3. second high-pressure chamber; 4. third high-pressure chamber; 5. hollow partition; 6. cabinet door; 7. pressure release assembly; 71. steel trough body; 72. rotating shaft; 73. left half pressure relief plate; 74. right half pressure relief plate; 75. tension spring; 76. pad; 77. shaft hole; 8. heat dissipation hole; 9. control instrument; 10. explosion-proof glass window; 11. handle lock. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 4 The utility model discloses an automatic pressure relief high-voltage power distribution cabinet, comprising a cabinet body 1, wherein the cabinet body 1 is provided with a first high-voltage chamber 2, a second high-voltage chamber 3 and a third high-voltage chamber 4 in sequence from bottom to top, and a hollow partition 5 is provided between the first high-voltage chamber 2, the second high-voltage chamber 3 and the third high-voltage chamber 4, and the front sides of the first high-voltage chamber 2, the second high-voltage chamber 3 and the third high-voltage chamber 4 are all provided with cabinet doors 6 by hinges, and the outer walls of the first high-voltage chamber 2, the second high-voltage chamber 3 and the third high-voltage chamber 4 are all provided with pressure relief components 7, and the pressure relief components 7 are respectively connected to the first high-voltage chamber 2, the second high-voltage chamber 3 and the third high-voltage chamber 4. The third high-pressure chambers 4 are interconnected. When an arc fault occurs in the cabinet, the air pressure in the high-pressure chamber increases. Under the influence of the expanding high-temperature and high-pressure gas, the left half pressure relief plate 73 and the right half pressure relief plate 74 will be pushed open to allow the high-pressure gas to be released outward. When the pressure in the high-pressure chamber is lower than the external pressure, the left half pressure relief plate 73 and the right half pressure relief plate 74 will automatically close under the action of the tension spring 75, and can be used repeatedly to save consumables. At the same time, the adjacent high-pressure chambers are separated by a hollow partition 5, and there is an air buffer zone inside, which can prevent the high-pressure chamber from being penetrated and melted by the fault arc, and has certain mechanical and thermal protection capabilities;

[0022] The pressure release assembly 7 includes a steel tank body 71, a rotating shaft 72, a left half pressure relief plate 73, a right half pressure relief plate 74 and a tension spring 75. The inner walls of the left and right sides of the steel tank body 71 are provided with pads 76. The rotating shaft 72 is installed in the middle of the steel tank body 71. One end of the left half pressure relief plate 73 and the right half pressure relief plate 74 are respectively hinged on the rotating shaft 72. One end of the tension spring 75 is respectively clamped on the left half pressure relief plate 73 and the right half pressure relief plate 74, and the other end of the tension spring 75 is clamped on the steel tank body 71.

[0023] Specifically, heat dissipation holes 8 are provided on the side walls of the first high-voltage chamber 2 , the second high-voltage chamber 3 and the third high-voltage chamber 4 , and the heat dissipation holes 8 are located on the left and right sides of the first high-voltage chamber 2 , the second high-voltage chamber 3 and the third high-voltage chamber 4 .

[0024] In this embodiment, the electrical equipment generates heat during operation, and the heat dissipation holes 8 are provided to help discharge the heat.

[0025] Specifically, a control instrument 9 is embedded on the cabinet door 6 of the first high-voltage chamber 2 , and explosion-proof glass windows 10 are installed on the cabinet doors 6 of the second high-voltage chamber 3 and the third high-voltage chamber 4 .

[0026] In this embodiment, the control instrument 9 refers to electrical instrument equipment used to monitor, control and protect the distribution system. Their main functions are to monitor electrical parameters in real time, control the operating status of electrical equipment, and perform remote centralized monitoring and control of the distribution system, such as PLC controllers, voltage, current, frequency meters, electric energy meters, etc.

[0027] Specifically, a handle lock 11 is installed on the cabinet door 6 , and is locked to the first high-voltage chamber 2 , the second high-voltage chamber 3 and the third high-voltage chamber 4 through the handle lock 11 .

[0028] In this embodiment, the handle lock 11 can effectively protect the safety of the power distribution cabinet and prevent criminals from picking the lock or destroying it.

[0029] Specifically, the pressure release assembly 7 of the first high-pressure chamber 2 and the second high-pressure chamber 3 is arranged on the rear wall thereof, and the pressure release assembly 7 of the third high-pressure chamber 4 is arranged on the top thereof.

[0030] In this embodiment, when an arc fault occurs in the cabinet, the air pressure in the high-pressure chamber increases, and the left half pressure relief plate 73 and the right half pressure relief plate 74 are pushed open to allow the high-pressure gas to be released outward.

[0031] Specifically, one end of the left half pressure relief plate 73 and the right half pressure relief plate 74 are both provided with an axis hole 77 , and the rotating shaft 72 is inserted into the axis hole 77 .

[0032] In this embodiment, one end of the left half pressure relief plate 73 and the right half pressure relief plate 74 are hinged in the steel tank body 71 through the rotating shaft 72, and the steel tank body 71 is closed during normal operation.

[0033] During use, when an arc fault occurs in the cabinet, the air pressure in the high-pressure chamber increases, and under the influence of the expanding high-temperature and high-pressure gas, the left half pressure relief plate 73 and the right half pressure relief plate 74 will be pushed open and in an open state, allowing the high-pressure gas to be released outward. When the pressure in the high-pressure chamber is lower than the external pressure, the left half pressure relief plate 73 and the right half pressure relief plate 74 will automatically close under the action of the tension spring 75, and can be used repeatedly to save consumables. At the same time, adjacent high-pressure chambers are separated by a hollow partition plate 5, and there is an air buffer zone inside, which can prevent the high-pressure chamber from being penetrated and melted by the fault arc, and has certain mechanical and thermal protection capabilities.

[0034] To sum up, in the automatic pressure relief high-voltage distribution cabinet, when an arc fault occurs in the cabinet, the air pressure in the high-voltage chamber increases, and under the influence of the expanding high-temperature and high-pressure gas, the left half pressure relief plate 73 and the right half pressure relief plate 74 will be pushed open and in an open state, allowing the high-pressure gas to be released outward, and when the pressure in the high-voltage chamber is lower than the external pressure, the left half pressure relief plate 73 and the right half pressure relief plate 74 will automatically close under the action of the tension spring 75, and can be used repeatedly, saving consumables. At the same time, adjacent high-voltage chambers are separated by a hollow partition plate 5, and there is an air buffer zone inside, which can prevent the high-voltage chamber from being penetrated and melted by the fault arc, and has certain mechanical and thermal protection capabilities.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-voltage power distribution cabinet with automatic pressure relief, comprising a cabinet body (1), characterized in that: The cabinet body (1) is provided with a first high-pressure chamber (2), a second high-pressure chamber (3) and a third high-pressure chamber (4) in sequence from bottom to top, and a hollow partition (5) is provided between the first high-pressure chamber (2), the second high-pressure chamber (3) and the third high-pressure chamber (4), and cabinet doors (6) are installed on the front sides of the first high-pressure chamber (2), the second high-pressure chamber (3) and the third high-pressure chamber (4) through hinges, and pressure release components (7) are installed on the outer walls of the first high-pressure chamber (2), the second high-pressure chamber (3) and the third high-pressure chamber (4), and the pressure release components (7) are mutually connected with the first high-pressure chamber (2), the second high-pressure chamber (3) and the third high-pressure chamber (4) respectively; The pressure release assembly (7) comprises a steel tank body (71), a rotating shaft (72), a left half pressure relief plate (73), a right half pressure relief plate (74) and a tension spring (75). The inner walls on both sides of the steel tank body (71) are provided with cushion blocks (76). The rotating shaft (72) is installed in the middle of the steel tank body (71). One end of the left half pressure relief plate (73) and the right half pressure relief plate (74) are respectively hinged on the rotating shaft (72). One end of the tension spring (75) is respectively clamped on the left half pressure relief plate (73) and the right half pressure relief plate (74), and the other end of the tension spring (75) is clamped on the steel tank body (71).

2. The high-voltage power distribution cabinet with automatic pressure relief according to claim 1 is characterized in that: Heat dissipation holes (8) are provided on the side walls of the first high-pressure chamber (2), the second high-pressure chamber (3) and the third high-pressure chamber (4), and the heat dissipation holes (8) are located on the left and right sides of the first high-pressure chamber (2), the second high-pressure chamber (3) and the third high-pressure chamber (4).

3. The high-voltage power distribution cabinet with automatic pressure relief according to claim 1 is characterized in that: A control instrument (9) is embedded on the cabinet door (6) of the first high-voltage chamber (2), and explosion-proof glass windows (10) are installed on the cabinet doors (6) of the second high-voltage chamber (3) and the third high-voltage chamber (4).

4. The high-voltage power distribution cabinet with automatic pressure relief according to claim 1 is characterized in that: The cabinet door (6) is provided with a handle lock (11), and is locked to the first high-pressure chamber (2), the second high-pressure chamber (3) and the third high-pressure chamber (4) through the handle lock (11).

5. The high-voltage power distribution cabinet with automatic pressure relief according to claim 1 is characterized in that: The pressure release components (7) of the first high-pressure chamber (2) and the second high-pressure chamber (3) are arranged on the rear walls of the two chambers, and the pressure release component (7) of the third high-pressure chamber (4) is arranged on the top thereof.

6. The high-voltage power distribution cabinet with automatic pressure relief according to claim 1, characterized in that: One end of the left half pressure relief plate (73) and the right half pressure relief plate (74) are both provided with an axis hole (77), and the rotating shaft (72) is inserted into the axis hole (77).

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