Arc-suppression and pressure-relief device for switchgear

Abstract

The present invention discloses an arc ignition pressure relief device for a switch cabinet, which includes a pressure relief frame installed on the top of the switch cabinet, as well as a pressure relief cover plate, a reinforcing member, a pressure relief top plate, and a pressure relief inner plate; the pressure relief frame is provided with a vertical pressure relief channel; one side of the pressure relief cover plate is pivotally connected to the pressure relief frame by a hinge, and the other side is connected to the pressure relief frame by a nylon bolt; the pressure relief cover plate is provided with a plurality of first through holes; the reinforcing members are arranged side by side in the horizontal direction, and their ends are fixedly connected to the inner side wall of the pressure relief frame; both sides of the pressure relief top plate are respectively fixedly connected to the upper ends of adjacent reinforcing members; the pressure relief top plate is provided with a plurality of second through holes; a plurality of pressure relief inner plates are arranged layer by layer in the vertical direction between adjacent reinforcing members or between the reinforcing member and the inner side wall of the pressure relief frame; the pressure relief inner plate is provided with a third through hole, and the third through holes of two adjacent pressure relief inner plates up and down are arranged in a staggered manner. The present invention can achieve the pressure relief function during arc ignition in the switch cabinet and ensure the safety of personnel and equipment.

Description

Technical Field

[0001] The present invention relates to the field of electrical technology, and particularly to an arc - discharging pressure - relief device for a switchgear cabinet. Background Art

[0002] A switchgear cabinet is an electrical device. The external lines of the switchgear cabinet first enter the main control switch inside the cabinet, and then enter the sub - control switches. Each branch is set as required: common ones such as meters, automatic controls, motor magnetic switches, various AC contactors, etc.; some also have high - voltage and low - voltage switchgear cabinets with high - voltage busbars, such as in power plants; some also have low - frequency load shedding to protect the main equipment. The main function of the switchgear cabinet is to switch, control, and protect electrical equipment during the processes of power generation, power transmission, power distribution, and power conversion in the power system.

[0003] In a switchgear cabinet, internal - fault arc - burning accidents rarely occur, but they cannot be completely avoided. Once they occur, the fault arc can form high pressure and high temperature in a very short time, causing great harm to people and equipment. For this reason, relevant documents have put forward clear requirements: "Each high - voltage compartment of the switchgear cabinet should be equipped with a pressure - relief frame or a pressure - release device." Most of the existing switchgear cabinet bodies use flat - type pressure - relief covers, which cannot meet this requirement. Summary of the Invention

[0004] The purpose of the present invention is to provide an arc - discharging pressure - relief device for a switchgear cabinet to achieve the pressure - relief function during arc - burning in the switchgear cabinet, so as to ensure the safety of personnel and equipment.

[0005] To achieve the above - mentioned purpose, the solution of the present invention is as follows:

[0006] An arc - discharging pressure - relief device for a switchgear cabinet includes a pressure - relief frame installed on the top of the switchgear cabinet, as well as a pressure - relief cover plate, a strengthening member, a pressure - relief top plate, and a pressure - relief inner plate; the pressure - relief frame is provided with a vertical pressure - relief channel; one side of the pressure - relief cover plate is pivotally connected to the pressure - relief frame using a hinge, and the other side is connected to the pressure - relief frame using a nylon bolt; the pressure - relief cover plate is provided with a number of first through - holes; the strengthening members are arranged side by side in the horizontal direction, and their ends are fixedly connected to the inner side wall of the pressure - relief frame; both sides of the pressure - relief top plate are respectively fixedly connected to the upper ends of adjacent strengthening members; the pressure - relief top plate is provided with a number of second through - holes; a number of pressure - relief inner plates are arranged layer by layer in the vertical direction between adjacent strengthening members or between the strengthening member and the inner side wall of the pressure - relief frame; the pressure - relief inner plate is provided with a third through - hole, and the third through - holes of two adjacent pressure - relief inner plates up and down are arranged in a staggered manner.

[0007] A strengthening beam for locking the nylon bolt is arranged inside the pressure - relief frame.

[0008] The pressure relief cover plate is provided with a second folding edge for installing a hinge, and the hinge is fixedly connected to the second folding edge by at least two points.

[0009] The reinforcing member includes a first horizontal plate, a first inclined plate and a second horizontal plate. The upper and lower sides of the first inclined plate are integrally connected to the near sides of the first horizontal plate and the second horizontal plate respectively. A plurality of fourth through holes are provided on the first inclined plate, and the fourth through holes of two adjacent reinforcing members on the left and right are arranged in a staggered manner. A first mounting hole for assembling the pressure relief top plate is provided on the first horizontal plate.

[0010] The pressure relief top plate is designed to be symmetric about the left and right, and includes two third horizontal plates and two second inclined plates. The upper sides of the two second inclined plates are integrally connected, and the lower sides of the two second inclined plates are integrally connected to the two third horizontal plates respectively. The second through hole is provided on the second inclined plate. The third horizontal plate is fixedly connected to the first horizontal plate.

[0011] The third horizontal plate is fixedly connected to the first horizontal plate by welding.

[0012] One side of the pressure relief inner plate is provided with a third folding edge, and a second mounting hole is provided on the third folding edge. The third folding edge is locked to the fourth through hole or the inner side wall of the pressure relief frame by a bolt passing through the second mounting hole.

[0013] The pressure relief device further includes a diversion frame; the diversion frame covers the upper part of the pressure relief frame, and is provided with a horizontal diversion channel.

[0014] The diversion frame is installed by splicing a plurality of plate members, and a plurality of reinforcing ribs are provided on the surface of the diversion frame.

[0015] After adopting the above technical solutions, in the present invention, by arranging a reinforcing member in the pressure relief channel, the reinforcing member is not easily burned out during the pressure relief process, ensuring the strength and stability of the pressure relief frame; the pressure relief inner plate adopts a staggered hole design, which can allow high-temperature and high-pressure gas to flow crosswise between the pressure relief inner plates, repeatedly consuming the carried energy to achieve the pressure relief effect; both sides of the pressure relief cover plate are installed on the pressure relief frame by hinges and nylon bolts respectively. When the arc ignition intensity is too large, the nylon bolts break to open the pressure relief cover plate, which can not only ensure the safety of the equipment in the switch cabinet, but also ensure that the pressure relief cover plate is not blown away to ensure the safety of personnel. Description of the Drawings

[0016] Figure 1 is a three-dimensional view of a specific embodiment of the present invention;

[0017] Figure 2 is a top view of a specific embodiment of the present invention; [[ID=3%]]

[0018] Figure 3 is a cross-sectional view of a specific embodiment of the present invention;

[0019] Figure 4 Is the perspective view of the pressure relief cover plate in the specific embodiment of the present invention;

[0020] Figure 5 Is the perspective view of the reinforcement member in the specific embodiment of the present invention;

[0021] Figure 6 Is the perspective view of the pressure relief top plate in the specific embodiment of the present invention;

[0022] Figure 7 Is the perspective view of the pressure relief inner plate in the specific embodiment of the present invention;

[0023] Figure 8 Is the schematic diagram of the use of the specific embodiment of the present invention installed on the switch cabinet;

[0024] Figure 9 Is the perspective view of the diversion frame in the specific embodiment of the present invention;

[0025] Figure 10 Is the side view of the specific embodiment of the present invention installed on the switch cabinet;

[0026] Explanation of the reference numerals in the drawings:

[0027] 1 ---- Pressure relief frame; 11 --- Pressure relief channel; 12 --- First folded edge;

[0028] 13 --- Reinforcing beam; 2 ---- Pressure relief cover plate; 21 --- First through hole;

[0029] 22 --- Second folded edge; 3 ---- Reinforcement member; 31 --- First horizontal plate;

[0030] 32 --- First inclined plate; 33 --- Second horizontal plate; 34 --- Fourth through hole;

[0031] 35 --- First mounting hole; 4 ---- Pressure relief top plate; 41 --- Second through hole;

[0032] 42 --- Third horizontal plate; 43 --- Second inclined plate; 5 ---- Pressure relief inner plate;

[0033] 51 --- Third through hole; 52 --- Third folded edge; 53 --- Second mounting hole;

[0034] 6 ---- Diversion frame; 61 --- Diversion channel; 62 --- Reinforcing rib. Detailed implementation manners

[0035] In order to further explain the technical solution of the present invention, the present invention will be elaborated in detail below through specific embodiments. [[ID=<>

[0036] The present invention relates to an arc-suppression pressure-relief device for a switchgear cabinet, which comprises a pressure-relief frame 1 installed on the top of the switchgear cabinet, a pressure-relief cover plate 2, a reinforcing member 3, a pressure-relief top plate 4 and a pressure-relief inner plate 5;

[0037] The pressure-relief frame 1 is provided with a vertical pressure-relief channel 11;

[0038] One side of the pressure-relief cover plate 2 is pivotally connected to the pressure-relief frame 1 by a hinge, and the other side is connected to the pressure-relief frame 1 by a nylon bolt; the pressure-relief cover plate 2 is provided with a plurality of first through holes 21;

[0039] The reinforcing members 3 are arranged side by side in the horizontal direction, and the ends thereof are fixedly connected to the inner side wall of the pressure-relief frame 1;

[0040] Both sides of the pressure-relief top plate 4 are fixedly connected to the upper ends of adjacent reinforcing members 3; the pressure-relief top plate 4 is provided with a plurality of second through holes 41;

[0041] A plurality of pressure-relief inner plates 5 are arranged layer by layer in the vertical direction between adjacent reinforcing members 3 or between the reinforcing member 3 and the inner side wall of the pressure-relief frame 1; the pressure-relief inner plate 5 is provided with a third through hole 51, and the third through holes 51 of two adjacent pressure-relief inner plates 5 in the up-and-down direction are arranged in a staggered manner.

[0042] Reference Figures 1 to 10 as shown, shows a specific embodiment of the present invention.

[0043] The above-mentioned pressure-relief frame 1 comprises four pressure-relief side plates enclosing a cuboid shape, and the pressure-relief channel 11 is formed between the pressure-relief side plates. The lower ends of the pressure-relief side plates are all provided with a first folded edge 12. When installing the present invention, the pressure-relief frame 1 can be fixedly connected to the top of the switchgear cabinet by bolts passing through the folded edge.

[0044] According to the different positions where the pressure-relief frame 1 is fitted (such as the circuit breaker chamber, the busbar chamber, the cable chamber, etc.), the number of the pressure-relief cover plates 2 fitted on the pressure-relief frame 1 is different (generally one or two). When the number of the pressure-relief cover plates 2 is two, the far sides of the two pressure-relief cover plates 2 are pivotally connected to the pressure-relief frame 1 by hinges, and the near sides of the two pressure-relief cover plates 2 are connected together by nylon bolts.

[0045] Further, a reinforcing beam 13 is arranged inside the pressure-relief frame 1, and the pressure-relief cover plate 2 is connected to the reinforcing beam 13 by a nylon bolt to improve the installation strength of the pressure-relief cover plate 2.

[0046] The above-mentioned pressure-relief cover plate 2 is provided with a second folded edge 22 for installing a hinge, and the hinge is fixedly connected to the second folded edge 22 through at least two points.

[0047] The above-mentioned hinge is processed by a forging machine to improve the strength of the hinge and ensure that the pressure-relief cover plate 2 will not break away from the pressure-relief frame 1 during pressure relief to avoid flying of materials.

[0048] The above-mentioned reinforcing member 3 includes a first horizontal plate 31, a first inclined plate 32 and a second horizontal plate 33. The upper and lower sides of the first inclined plate 32 are integrally connected to the near sides of the first horizontal plate 31 and the second horizontal plate 33 respectively; a plurality of fourth through holes 34 are provided on the first inclined plate 32, and the fourth through holes 34 between two adjacent reinforcing members 3 on the left and right are arranged in a staggered manner; a first installation hole 35 for assembling the pressure relief top plate 4 is provided on the first horizontal plate 31. By arranging the staggered fourth through holes 34 on the first inclined plate 32 of the reinforcing member 3, the internal consumption of high-temperature and high-pressure gas can be further increased.

[0049] In some embodiments of the pressure relief top plate 4, the above-mentioned pressure relief top plate 4 is designed to be symmetric about the left and right, and includes two third horizontal plates 42 and two second inclined plates 43. The upper sides of the two second inclined plates 43 are integrally connected, and the lower sides of the two second inclined plates 43 are integrally connected to the two third horizontal plates 42 respectively; the above-mentioned second through hole 41 is provided on the second inclined plate 43; the third horizontal plate 42 is fixedly connected to the first horizontal plate 31. Since the pressure relief top plate 4 includes the obliquely arranged second inclined plates 43, the second through holes 41 are also obliquely arranged. When the high-temperature and high-pressure gas continues to flow upward after passing through the pressure relief inner plate 5 and passes through the second inclined plates 43, it needs to change direction, that is, part of the energy will be further consumed.

[0050] Further, the above-mentioned third horizontal plate 42 is fixedly connected to the first horizontal plate 31 by welding to ensure the connection strength.

[0051] In some embodiments of the pressure relief inner plate 5, a third folded edge 52 is provided on one side of the pressure relief inner plate 5, a second installation hole 53 is provided on the third folded edge 52, and the third folded edge 52 is locked to the inner side wall of the fourth through hole 34 or the pressure relief frame 1 by using bolts to pass through the second installation hole 53. Then, a part of the fourth through hole 34 serves as the installation place for fixing the pressure relief inner plate 5, and a part is used for guiding and consuming energy.

[0052] The present invention further includes a Figure 9 shown diversion frame 6. The diversion frame 6 is arranged above the pressure relief frame 1 and is provided with a horizontal diversion channel 61. Through the diversion frame 6, the generated high-temperature and high-pressure gas can be led to the outside of the room, avoiding the breathing accidents of the staff caused by the unqualified indoor air quality.

[0053] Further, the diversion frame 6 is installed by splicing a plurality of plate members, which is convenient for installation in the substation, and a plurality of reinforcing ribs 62 are provided on the surface of the diversion frame 6 to ensure the stability of the overall structure.

[0054] Refer to Figure 8 and Figure 10As shown, when the present invention is actually used, the pressure relief frame 1 is first installed on the top of the switch cabinet, then the diversion frame 6 is installed on the top of the switch cabinet to cover the pressure relief frame 1, and then the diversion channel 61 of the diversion frame 6 is connected to the outside or the gas recovery device according to the indoor layout. The present invention is applicable to both DC switch cabinets and AC switch cabinets.

[0055] Through the above solution, in the present invention, the reinforcing member 3 is arranged in the pressure relief channel 11. The reinforcing member 3 is not easily burned out during the pressure relief process, ensuring the strength and stability of the pressure relief frame 1; the pressure relief inner plate 5 adopts a staggered hole design, which allows the high-temperature and high-pressure gas to flow crosswise between the pressure relief inner plates 5, repeatedly consuming the carried energy to achieve the pressure relief effect; both sides of the pressure relief cover plate 2 are installed on the pressure relief frame 1 by hinges and nylon bolts. When the arc ignition intensity is too high, the nylon bolts break to open the pressure relief cover plate 2, which can not only ensure the safety of the equipment in the switch cabinet but also ensure that the pressure relief cover plate 2 is not blown away to ensure the safety of personnel.

[0056] The above embodiments and diagrams do not limit the product form and style of the present invention. Any appropriate changes or modifications made by those of ordinary skill in the technical field to which the present invention pertains shall be regarded as not departing from the patent scope of the present invention.

Claims

1. An arc-suppression pressure-relief device for a switchgear cabinet, characterized in that: It includes a pressure-relief frame installed on the top of the switchgear cabinet, a pressure-relief cover plate, a reinforcing member, a pressure-relief top plate and a pressure-relief inner plate; The pressure-relief frame is provided with a vertical pressure-relief channel; One side of the pressure-relief cover plate is pivotally connected to the pressure-relief frame by a hinge, and the other side is connected to the pressure-relief frame by a nylon bolt; the pressure-relief cover plate is provided with a number of first through holes; The reinforcing members are arranged side by side in the horizontal direction, and the lower ends thereof are fixedly connected to the inner side wall of the pressure-relief frame; Both sides of the pressure-relief top plate are respectively fixedly connected to the upper ends of adjacent reinforcing members; the pressure-relief top plate is provided with a number of second through holes; A number of pressure-relief inner plates are arranged layer by layer in the vertical direction between adjacent reinforcing members and between the reinforcing member and the inner side wall of the pressure-relief frame; the pressure-relief inner plate is provided with a third through hole, and the third through holes of two adjacent upper and lower pressure-relief inner plates are arranged in a staggered manner.

2. The arc-suppression pressure-relief device for a switchgear cabinet according to claim 1, characterized in that: A reinforcing beam for locking the nylon bolt is arranged in the pressure-relief frame.

3. The arc-suppression pressure-relief device for a switchgear cabinet according to claim 1, characterized in that: The pressure-relief cover plate is provided with a second folding edge for installing a hinge, and the hinge is fixedly connected to the second folding edge through at least two points.

4. The arc-suppression pressure-relief device for a switchgear cabinet according to claim 1, characterized in that: The reinforcing member includes a first horizontal plate, a first inclined plate and a second horizontal plate. The upper and lower sides of the first inclined plate are integrally connected to the near sides of the first horizontal plate and the second horizontal plate respectively; a number of fourth through holes are arranged on the first inclined plate, and the fourth through holes of two adjacent left and right reinforcing members are arranged in a staggered manner; a first installation hole for assembling the pressure-relief top plate is arranged on the first horizontal plate.

5. The arc-suppression pressure-relief device for a switchgear cabinet according to claim 4, characterized in that: The pressure-relief top plate is designed to be left-right symmetric, and includes two third horizontal plates and two second inclined plates. The upper sides of the two second inclined plates are integrally connected, and the lower sides of the two second inclined plates are respectively integrally connected to the two third horizontal plates; the second through holes are arranged on the second inclined plates; the third horizontal plates are fixedly connected to the first horizontal plates.

6. The arc-suppression pressure-relief device for a switchgear cabinet according to claim 5, characterized in that: The third horizontal plate is fixedly connected to the first horizontal plate by welding.

7. The arc-suppression pressure-relief device for a switchgear cabinet according to claim 4, characterized in that: One side of the pressure-relief inner plate is provided with a third folding edge, and a second installation hole is arranged on the third folding edge. The third folding edge is locked to the fourth through hole or the inner side wall of the pressure-relief frame by a bolt passing through the second installation hole.

8. The arc-suppression pressure-relief device for a switchgear cabinet according to any one of claims 1 to 7, characterized in that: It further includes a diversion frame; the diversion frame covers the upper part of the pressure-relief frame, and is provided with a horizontal diversion channel.

9. The arc-suppression pressure-relief device for a switchgear cabinet according to claim 8, characterized in that: The diversion frame is installed by splicing a number of plate members, and a number of reinforcing ribs are provided on the surface of the diversion frame.

Images