Dedicated pressure relief channel high-voltage switch cabinet for arcing

Abstract

The utility model relates to the technical field of switch cabinets, and discloses a pressure relief channel high-voltage switch cabinet special for arcing, which comprises a bottom plate arranged on a cabinet body, a pressure relief cavity I, a pressure relief cavity II, a pressure relief cover plate I and a pressure relief cover plate II, wherein the pressure relief cavity I and the pressure relief cavity II are arranged on the bottom plate, and the pressure relief cover plate I and the pressure relief cover plate II are correspondingly hinged to the pressure relief cavity I and the pressure relief cavity II. Pressure relief assemblies are arranged in the first pressure relief cavity and the second pressure relief cavity correspondingly, the pressure relief assemblies in the first pressure relief cavity are arranged in a bilateral symmetry mode, each pressure relief assembly comprises a plurality of flow division bent plates which are sequentially connected through bolts, pressure buffering assemblies are arranged in the flow division bent plates, and each pressure buffering assembly comprises a buffering plate arranged in the corresponding flow division bent plate; guide rods are arranged on the front portion and the rear portion of the upper portion of the buffer plate and movably sleeved with reset springs. According to the scheme, arcing can be extinguished quickly, and the pressure relief effect is good; and through the arrangement of the pressure buffering assembly, the impact acting force can be relieved, the damage degree of arcing to the outside is reduced, and the safety of the switch cabinet is further guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, specifically a high-voltage switchgear with a dedicated pressure relief channel for arcing. Background Technology

[0002] Switchgear, as an electrical device, is mainly used for opening, closing, controlling, and protecting electrical equipment during power generation, transmission, distribution, and energy conversion in power systems. If an internal short circuit or other arcing fault occurs during switchgear operation and the generated gases and molten material cannot be discharged in time, it can easily cause harm to on-site operators. Especially under short-circuit currents of tens of thousands of amperes, high-temperature and high-pressure gases are instantly generated. If these gases cannot be effectively released within a very short time in the confined space of the switchgear, it can cause the switchgear to explode, damaging adjacent switchgear and potentially injuring personnel. This not only results in huge losses of equipment and property but also causes personal injury and a series of indirect losses.

[0003] When an electric arc is generated, the instantaneous impact force can damage the mechanism's frame and components. Simultaneously, if the internal gas is not released in time, the internal pressure can increase rapidly, potentially leading to explosions and other accidents, posing a significant safety hazard. To address this, we propose a high-voltage switchgear with a dedicated pressure relief channel for arcing. Utility Model Content

[0004] The purpose of this utility model is to provide a high-voltage switchgear with a dedicated arc-induced pressure relief channel to solve the problem mentioned in the background art that the existing arc-induced pressure relief structure can damage the frame and components of the mechanism when an electric arc is generated, and the internal gas cannot be released in time, which can cause the internal pressure to increase sharply and cause accidents such as explosions, posing a great safety hazard.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-voltage switchgear for arc-induced pressure relief channels, comprising a base plate mounted on the cabinet body, a pressure relief chamber one and a pressure relief chamber two mounted on the base plate, and pressure relief cover plates one and two hinged to the pressure relief chamber one and pressure relief cover plates two respectively. Nylon bolts are provided on the side of the pressure relief cover plates one and two away from the hinge. Pressure relief components are provided inside both the pressure relief chamber one and the pressure relief chamber two. The pressure relief components inside the pressure relief chamber one are symmetrically arranged left and right. A lower support plate and an upper support plate are provided above the pressure relief components. A reinforcing member is provided between the lower support plate and the upper support plate. U-shaped guide plates with upward openings are provided on both the left and right sides of the upper support plate. The U-shaped guide plates are located below the pressure relief cover plates one and two.

[0006] The pressure relief assembly includes multiple diversion bends connected in sequence by bolts. Multiple strip grooves for heat dissipation are provided on the outer side of the diversion bends. Threaded holes for connection are provided on the top of the diversion bends. Guide holes are provided on the outer side of adjacent threaded holes. Pressure relief components are provided inside the diversion bends.

[0007] The pressure relief assembly includes a buffer plate located inside the diversion bend plate. Guide rods are provided on both the front and rear sides of the buffer plate. A return spring is movably sleeved on the guide rod. The return spring is located above the buffer plate. A limit block is connected to the outside of the buffer plate by a limit bolt. The limit block is engaged in the corresponding strip groove.

[0008] Preferably, the base plate is provided with through grooves corresponding to the positions of pressure relief chamber one and pressure relief chamber two, and the base plate and pressure relief chamber one and pressure relief chamber two are fixedly installed.

[0009] Preferably, both the U-shaped guide plate and the upper support plate have connecting holes with collinear centers.

[0010] Preferably, the U-shaped guide plate is located directly below the nylon bolt on the corresponding side.

[0011] Preferably, the cross-section of the reinforcing member is a U-shape with the opening facing downwards, and the reinforcing member and the cabinet are fixedly installed.

[0012] Preferably, the inner ends of adjacent diversion bends are spaced apart, and the openings of the diversion bends face downwards.

[0013] Preferably, the width of the buffer plate is less than the effective inner distance of the diversion bend plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This type of high-voltage switchgear with a dedicated pressure relief channel for arcing uses a pressure relief component inside the pressure relief channel. The pressure relief component consists of multiple diversion bends stacked into a tower shape. The diversion bends can quickly divert the high-temperature gas inside the cabinet. During the diversion process, the gas passes through the diversion bends, which can cut the arc and help extinguish the arc quickly. It has a good pressure relief effect and high stability.

[0016] 2. This type of high-voltage switchgear with a dedicated arc-induced pressure relief channel utilizes a pressure-reducing component. When an electric arc is generated, the instantaneous impact force causes the buffer plate to move upwards within the shunt bend, compressing the return spring. On one hand, this buffers the impact force, reducing the external jet force and effectively ensuring the safety of the switchgear. On the other hand, by compressing the return spring 73 through the buffer plate, the damage caused by the arc impact force to the mechanism frame and components can be effectively reduced, further ensuring the effectiveness of the pressure relief channel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of a half-section of the present invention;

[0019] Figure 3 For the present utility model Figure 2 Enlarged schematic diagram at point M;

[0020] Figure 4 This is a schematic diagram of the pressure relief component of this utility model;

[0021] Figure 5 This is a schematic diagram of the flow diversion bending plate structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the stacked state of the diversion bending plates of this utility model;

[0023] Figure 7 This is a schematic diagram showing the connection between the diversion bend and the pressure relief component of this utility model;

[0024] Figure 8 This is a schematic diagram of the pressure-relieving component structure of this utility model.

[0025] In the diagram: 1. Base plate; 2. Pressure relief chamber one; 3. Pressure relief cover plate one; 4. Pressure relief chamber two; 5. Nylon bolt; 6. Pressure relief assembly; 61. Diverter bend; 611. Strip groove; 612. Threaded hole; 62. Lower support plate; 63. Reinforcing member; 64. Upper support plate; 65. U-shaped guide plate; 66. Connecting hole; 67. Guide hole; 7. Pressure relief assembly; 71. Buffer plate; 72. Guide rod; 73. Return spring; 74. Limiting block; 75. Limiting bolt; 8. Pressure relief cover plate two. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example: Please refer to Figure 1-8This utility model provides a technical solution: a high-voltage switchgear with a dedicated pressure relief channel for arcing, comprising a base plate 1 mounted on the cabinet, a pressure relief chamber 2 and a pressure relief chamber 4 mounted on the base plate 1, and pressure relief cover plates 3 and 8 connected to the pressure relief chambers 2 and 4 respectively by hinges. The base plate 1 has through grooves corresponding to the positions of the pressure relief chambers 2 and 4, and the base plate 1 and the pressure relief chambers 2 and 4 are all fixedly installed. Nylon bolts 5 are provided on the side of the pressure relief cover plates 3 and 8 away from the hinges. Under high temperatures, the nylon bolts 5 can break, thereby facilitating the opening of the pressure relief cover plates 3 and 8 to achieve arcing pressure relief.

[0028] Please see Figure 1 and Figure 2 Both pressure relief chamber 1 (2) and pressure relief chamber 2 (4) are equipped with pressure relief components 6. The pressure relief components 6 inside pressure relief chamber 1 (2) are symmetrically arranged on the left and right sides. A lower support plate 62 and an upper support plate 64 are provided above the pressure relief components 6. A reinforcing member 63 is provided between the lower support plate 62 and the upper support plate 64. The reinforcing member 63 has a U-shaped cross-section with the opening facing downwards, and it is fixedly installed to the cabinet. The reinforcement member 63, the lower support plate 62, and the upper support plate 64 increase the strength of the pressure relief channel.

[0029] Furthermore, U-shaped guide plates 65 with upward openings are provided on both sides of the upper support plate 64, and the U-shaped guide plates 65 are located below the first pressure relief cover plate 3 and the second pressure relief cover plate 8. Both the U-shaped guide plates 65 and the upper support plate 64 have collinear connecting holes 66. The U-shaped guide plates 65 are located directly below the corresponding nylon bolts 5. When an electric arc is generated, the generated gas flows upward through the connecting holes 66. At this time, the generated gas is directly facing the nylon bolts 5, facilitating rapid breakage of the nylon bolts 5, allowing the first pressure relief cover plate 3 and the second pressure relief cover plate 8 to open quickly for pressure relief operation.

[0030] Please see Figure 2 , Figure 5 and Figure 6 The pressure relief assembly 6 includes multiple diversion bends 61 connected sequentially by bolts. Adjacent diversion bends 61 are spaced apart at their corresponding inner ends, and their openings face downwards. The multiple diversion bends 61 are stacked into a tower shape. Multiple heat dissipation grooves 611 are provided on the outer side of each diversion bend 61, facilitating rapid gas discharge. Threaded holes 612 are provided above each diversion bend 61, and guide holes 67 are provided on the outer side of adjacent threaded holes 612. A pressure-reducing assembly 7 is installed inside each diversion bend 61. When an electric arc is generated, the instantaneous impact force causes the pressure-reducing assembly 7 to move upwards, buffering the impact force, reducing external damage, and not affecting gas discharge.

[0031] Please see Figure 3 , Figure 7 and Figure 8 The pressure-relief assembly 7 includes a buffer plate 71, the width of which is less than the effective inner distance of the diversion bend 61. The buffer plate 71 is located inside the diversion bend 61, and guide rods 72 are provided at both the front and rear of the buffer plate 71. A return spring 73 is movably sleeved on each guide rod 72, positioned above the buffer plate 71. Initially, the buffer plate 71 is positioned below the inner cavity of the diversion bend 61 by the action of the return spring 73. A limit block 74 is connected to the outer side of the buffer plate 71 via a limit bolt 75, and the limit block 74 engages with the corresponding slot 611. The limit block 74 guides the movement of the buffer plate 71 within the diversion bend 61; and the limit block 74 is fixed to the buffer plate 71 by bolts, facilitating the fixation of the entire pressure-relief assembly 7 to the diversion bend 61. When an electric arc is generated, the instantaneous impact force causes the buffer plate 71 to move upward inside the diversion bend plate 61, squeezing the return spring 73. On the one hand, this buffers the impact force, reduces the force of the impact on the outside, and effectively ensures the safety of the switchgear. On the other hand, by squeezing the return spring 73 through the buffer plate 71, the damage caused by the electric arc impact force to the mechanism frame and components can be effectively reduced, further ensuring the effectiveness of the pressure relief channel.

[0032] Working principle: In this type of high-voltage switchgear with a dedicated arc-relieving pressure channel, when an electric arc is generated, the instantaneous impact force propels the arc-relieving gas into pressure relief chambers 1-2 and 2-4 through the opening on the base plate 1. Figure 4 As shown in the state distribution, when gas enters the interior of the diversion bend 61 through the opening, the impact force causes the buffer plate 71 to move upward inside the diversion bend 61, squeezing the return spring 73. On the one hand, this buffers the impact force, reduces the impact force on the outside, and effectively ensures the safety of the switchgear. On the other hand, by squeezing the return spring 73 through the buffer plate 71, the damage caused by the electric arc impact force to the mechanism frame and components can be effectively reduced.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An arc-furnace dedicated pressure relief channel high-voltage switchgear, comprising a bottom plate (1) arranged on a cabinet body, a pressure relief cavity I (2) arranged on the bottom plate (1), a pressure relief cavity II (4), and a pressure relief cover plate I (3) and a pressure relief cover plate II (8) corresponding to the hinge connection between the pressure relief cavity I (2) and the pressure relief cavity II (4), wherein the pressure relief cover plate I (3) and the pressure relief cover plate II (8) are provided with nylon bolts (5) away from the hinged side, characterized in that: The pressure relief cavity one (2) and the pressure relief cavity two (4) are internally provided with pressure relief assemblies (6), the pressure relief assemblies (6) in the pressure relief cavity one (2) are symmetrically arranged left and right, the pressure relief assemblies (6) are provided with lower supporting plates (62) and upper supporting plates (64) above, the lower supporting plates (62) and the upper supporting plates (64) are provided with reinforcing pieces (63) therebetween, the upper supporting plates (64) are provided with U-shaped guide plates (65) with openings upward on the left and right sides, and the U-shaped guide plates (65) are arranged below the pressure relief cover plate one (3) and the pressure relief cover plate two (8); ​ The pressure relief assembly (6) comprises a plurality of shunt bent plates (61) connected in sequence by bolts, the shunt bent plates (61) are provided with a plurality of strip-shaped grooves (611) for heat dissipation on the outer sides, the shunt bent plates (61) are provided with connected threaded holes (612) above, the outer sides of adjacent threaded holes (612) are provided with guide holes (67), and the shunt bent plates (61) are internally provided with pressure relief assemblies (7); The pressure relief assembly (7) comprises a buffer plate (71), the buffer plate (71) is arranged in the shunt bent plate (61), the buffer plate (71) is provided with guide rods (72) forward and rearward above, the guide rods (72) are movably sleeved with return springs (73) above, the return springs (73) are arranged above the buffer plate (71), the buffer plate (71) is connected with a limiting block (74) by a limiting bolt (75) on the outer side, and the limiting block (74) is clamped in the corresponding strip-shaped groove (611).

2. The arc-furnace dedicated pressure relief channel high-voltage switchgear according to claim 1, characterized in that: The bottom plate (1) is provided with through grooves corresponding to the positions of the pressure relief cavity one (2) and the pressure relief cavity two (4), and the bottom plate (1) and the pressure relief cavity one (2) and the pressure relief cavity two (4) are fixedly installed.

3. The arc-furnace dedicated pressure relief channel high-voltage switchgear according to claim 1, characterized in that: The U-shaped guide plates (65) and the upper supporting plates (64) are all provided with central and collinear communication holes (66).

4. The arc-furnace dedicated pressure relief channel high-voltage switchgear according to claim 1, characterized in that: The U-shaped guide plates (65) are arranged directly below the corresponding nylon bolts (5) on the sides.

5. The arc-furnace dedicated pressure relief channel high-voltage switchgear according to claim 1, characterized in that: The reinforcing piece (63) is in the shape of a U-shaped with an opening downward in section, and the reinforcing piece (63) is fixedly installed with the cabinet body.

6. The arc-furnace dedicated pressure relief channel high-voltage switchgear according to claim 1, characterized in that: Adjacent shunt bent plates (61) are arranged at intervals corresponding to the inner ends, and the shunt bent plates (61) have openings downward.

7. The arc-furnace dedicated pressure relief channel high-voltage switchgear according to claim 1, characterized in that: The width of the buffer plate (71) is less than the effective distance of the inner side of the shunt bent plate (61).

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