A high-safety power distribution cabinet with automatic pressure relief function

Abstract

The utility model relates to the technical field of power distribution equipment, specifically a high-safety power distribution cabinet with automatic pressure relief function, including: a cabinet body, a pressure relief device is provided on the top of the cabinet body, and a protective cover is provided on the top of the pressure relief device; the pressure relief device includes a fixed plate and a pressure relief plate, and the fixed plate and the pressure relief plate are connected by a locking assembly; an unlocking assembly is provided in the fixed plate, and the unlocking assembly can release the lock of the locking assembly. The utility model utilizes the connection between the lock tongue and the bypass groove to limit the rotation of the pressure relief plate, and utilizes the elastic force of the locking spring to prevent the lock tongue from moving under normal pressure. By arranging an unlocking assembly in the bypass groove, the unlocking piston is driven by high-pressure gas to move toward the side opening of the bypass groove, thereby driving the lock tongue to separate from the bypass groove, and then the pressure relief plate is driven by high-pressure gas to rotate upward, and the high-pressure gas is discharged from the opening of the pressure relief plate to achieve automatic pressure relief. During the pressure relief process, the pressure relief plate will not be deformed and can be reused, thereby reducing the cost of use and maintenance.

Description

Technical Field

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

[0002] The power distribution cabinet is a device for concentrating, switching and distributing electric energy. It is the final equipment of the power distribution system. Large electrical equipment can be placed inside it. It is generally used as a power distribution equipment with medium capacity load. During the operation of the power distribution cabinet, a short circuit fault may occur due to short circuit, insulation aging, human operation error and other reasons. At this time, a short-circuit current of tens of thousands of amperes will be generated in the power distribution cabinet, and high-temperature and high-pressure gas will be generated instantly. If the high-temperature and high-pressure gas cannot be effectively released in a very short time, it will cause the power distribution cabinet to explode, damage the adjacent power distribution cabinets, and may also endanger people's safety.

[0003] In the prior art, the power distribution cabinet is generally provided with a pressure relief channel on the top or back. Each functional room is provided with an independent pressure relief channel. A rectangular metal plate is provided on the outside of the top of the pressure relief channel. One side of the metal plate is fixed with metal screws, and the other side is fixed with nylon screws. When a fault arc occurs, the temperature inside the power distribution cabinet rises rapidly, the top plate is deformed, and the nylon screws are broken, or the nylon screws melt due to the high temperature, and one side of the top plate is pushed open by the high-temperature and high-pressure gas to achieve pressure relief. However, after the pressure relief is completed, the top plate is scrapped and needs to be replaced. The use and maintenance costs are increased. At the same time, there is a risk of the top plate flying out. Utility Model Content

[0004] In order to make up for the above deficiencies, the utility model provides a high-safety power distribution cabinet with an automatic pressure relief function.

[0005] The technical solution of the utility model is:

[0006] A high-safety power distribution cabinet with automatic pressure relief function, comprising:

[0007] A cabinet body, wherein various power distribution equipment is installed in the cabinet body, a plurality of pressure relief devices are arranged above the cabinet body through a top frame, a plurality of reinforcing beams are arranged in the top frame, and the reinforcing beams divide the interior of the top frame into a plurality of spaces, and each pressure relief device corresponds to a space;

[0008] The pressure relief device comprises a fixed plate, a pressure relief plate is rotatably mounted in the center of the fixed plate by rotating a cover plate, a bypass groove is provided on one side of the fixed plate close to the locking assembly, the bypass groove has three openings, the head of the pressure relief plate is fixedly connected to the side opening of the bypass groove through the locking assembly, and an unlocking assembly is provided in the bypass groove;

[0009] The locking assembly comprises a locking tongue, and the locking tongue is connected with the bypass groove to realize the locking of the rotating cover plate;

[0010] The unlocking assembly includes an unlocking piston, which is slidably mounted in the bypass groove and is used to push the lock tongue out of the bypass groove to release the connection between the two;

[0011] A protective cover is provided above the pressure relief device, and through holes are provided on the top and back of the protective cover. The protective cover is used to prevent the pressure relief plate from flying out and limit the discharge direction of the high-pressure gas.

[0012] Preferably, a limiting plate is provided below the joint between the fixed plate and the pressure relief plate, and the limiting plate is used for sealing the joint between the fixed plate and the pressure relief plate.

[0013] Preferably, a rotation limit plate is provided below the pressure relief plate, the rotation limit plate is fan-shaped, and the rotation limit plate is used to limit the upward rotation angle of the pressure relief plate.

[0014] Preferably, a plurality of locking holes are provided on the side of the pressure relief plate away from the rotating cover plate, and a limiting groove is provided above the locking holes.

[0015] Preferably, the lock tongue is slidably installed in the lock hole, an unlocking stud is provided above the tail of the lock tongue, the unlocking stud passes through the limiting groove, and a locking spring is provided at the tail end of the lock tongue, and the locking spring is located in the lock hole.

[0016] Preferably, the unlocking assembly further includes a return spring, which is fixedly installed in the bypass groove and located behind the unlocking piston.

[0017] Preferably, a pressure relief channel is provided through the unlocking piston, and the pressure relief channel is L-shaped.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model utilizes the connection between the lock tongue and the bypass groove to limit the rotation of the pressure relief plate, and utilizes the elastic force of the locking spring to prevent the lock tongue from moving under normal pressure. By arranging an unlocking assembly in the bypass groove, the unlocking piston is driven by high-pressure gas to move toward the side opening of the bypass groove, thereby driving the lock tongue to separate from the bypass groove, and then the high-pressure gas is used to drive the pressure relief plate to rotate upward, and the high-pressure gas is discharged from the opening of the pressure relief plate to achieve automatic pressure relief. During the pressure relief process, the pressure relief plate will not be deformed and can be reused, thereby reducing the use and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the power distribution cabinet in the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the pressure relief device in the utility model;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the pressure relief device in the utility model in a closed state;

[0024] Figure 5 It is a schematic cross-sectional structure diagram of the pressure relief device in the utility model in an open state.

[0025] The meaning of each number in the figure is:

[0026] 1. Cabinet body; 11. Shell; 12. Cabinet door; 13. Column; 14. Top frame; 15. Reinforcement beam;

[0027] 2. Pressure relief device; 21. Fixed plate; 22. Bypass groove; 23. Rotating cover plate; 24. Pressure relief plate; 25. Limiting plate; 26. Rotating limiting plate; 27. Lock hole; 28. Limiting groove;

[0028] 3. Locking assembly; 31. Lock tongue; 32. Unlocking stud; 33. Locking spring;

[0029] 4. Unlocking assembly; 41. Return spring; 42. Unlocking piston; 43. Pressure relief channel;

[0030] 5. Protective cover. DETAILED DESCRIPTION

[0031] 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.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] Embodiment 1:

[0034] See also Figure 1-5 The utility model describes the above technical solution in detail through the following embodiments:

[0035] A high - security power distribution cabinet with an automatic pressure - relief function, comprising:

[0036] A cabinet body 1, in which various power distribution devices are installed. Above the cabinet body 1, several pressure - relief devices 2 are provided through a top frame 14. Several reinforcing beams 15 are arranged in the top frame 14. The reinforcing beams 15 divide the interior of the top frame 14 into several spaces, and each pressure - relief device 2 corresponds to one space.

[0037] The top frame 14 and the reinforcing beams 15 are fixedly connected by metal screws, and the position of the reinforcing beams 15 can be adjusted.

[0038] The cabinet body 1 further includes columns 13. An outer shell 11 is welded to the outside of the columns 13. A cabinet door 12 is rotatably installed at the front - side opening of the outer shell 11 through a hinge.

[0039] The space inside the outer shell 11 is used to install power distribution devices, and the cabinet door 12 is used to seal the cabinet body 1. The top frame 14 is fixedly installed at the top of the columns 13 by screws or welding.

[0040] The pressure - relief device 2 includes a fixing plate 21. A pressure - relief plate 24 is rotatably installed at the center of the fixing plate 21 through a rotating cover plate 23. A bypass groove 22 is provided on one side of the fixing plate 21 close to the locking assembly 3. The bypass groove 22 has three openings. The head of the pressure - relief plate 24 is fixedly connected to the side opening of the bypass groove 22 through the locking assembly 3. An unlocking assembly 4 is arranged in the bypass groove 22.

[0041] The fixing plate 21 is fixedly installed on the top surface of the top frame 14 by metal screws. The reinforcing beam 15 is located below the junction of two adjacent fixing plates 21 and is fixedly connected to the fixing plate 21 by metal screws.

[0042] A square through - hole is provided at the center of the fixing plate 21. The pressure - relief plate 24 is located in the central through - hole of the fixing plate 21. The tail part of the pressure - relief plate 24 is a cylinder, and the head part of the pressure - relief plate 24 is a square metal plate. There are two rotating cover plates 23. The two rotating cover plates 23 are fixedly installed on the top and bottom surfaces of the fixing plate 21 and clamp the tail part of the pressure - relief plate 24. The pressure - relief plate 24 can rotate up and down under the clamping of the two rotating cover plates 23 by using the cylinder at the tail.

[0043] A limiting plate 25 is provided below the joint of the fixing plate 21 and the pressure - relief plate 24.

[0044] The limiting plate 25 is in an inverted - U shape and is welded below the fixing plate 21. The limiting plate 25 is used for sealing the joint of the fixing plate 21 and the pressure - relief plate 24. At the same time, the limiting plate 25 can prevent the pressure - relief plate 24 from rotating downwards.

[0045] A rotating limiting plate 26 is welded below the pressure - relief plate 24. The rotating limiting plate 26 is in a fan - shape and is used to limit the upward rotation angle of the pressure - relief plate 24.

[0046] When the pressure relief plate 24 rotates upward, the rotation limit plate 26 will rotate upward with the pressure relief plate 24 until the bottom of the rotation limit plate 26 abuts against the limit plate 25, thereby stopping the rotation, and then stopping the rotation of the pressure relief plate 24, thereby limiting the rotation angle of the pressure relief plate 24. At the same time, the rotation limit plate 26 can limit the high-pressure gas from being discharged from both sides of the pressure relief plate 24.

[0047] A plurality of locking holes 27 are provided on a side of the pressure relief plate 24 away from the rotating cover plate 23 , and a limiting groove 28 is provided above the locking holes 27 .

[0048] The locking hole 27 is a circular hole, and the limiting groove 28 is a waist-shaped hole. The width of the limiting groove 28 is smaller than the inner diameter of the locking hole 27.

[0049] The locking assembly 3 includes a locking tongue 31, which is connected to the bypass groove 22 to lock the rotating cover plate 23. The locking tongue 31 is slidably installed in the lock hole 27, and an unlocking stud 32 is threadedly installed on the upper end of the lock tongue 31. The unlocking stud 32 passes through the limiting groove 28. A locking spring 33 is clamped and installed at the rear end of the lock tongue 31, and the locking spring 33 is located in the lock hole 27.

[0050] The tail end of the locking spring 33 abuts against the inner end surface of the lock hole 27, and the elastic force of the locking spring 33 drives the lock tongue 31 to slide outside the lock hole 27, while the unlocking stud 32 can prevent the lock tongue 31 from completely sliding out. Under normal pressure, the lock tongue 31 is inserted into the bypass groove 22, which can prevent the pressure relief plate 24 from rotating upward, and cooperates with the limit plate 25 to limit the rotation of the pressure relief plate 24. At the same time, the elastic force of the locking spring 33 can prevent the lock tongue 31 from accidentally sliding out of the bypass groove 22.

[0051] Applying a force toward the locking spring 33 to the unlocking stud 32 can drive the locking tongue 31 to slide in the direction of the locking spring 33, compressing the locking spring 33. When the unlocking stud 32 slides to the rear end of the limiting groove 28, the locking tongue 31 is completely received in the lock hole 27.

[0052] The unlocking assembly 4 includes an unlocking piston 42 , which is slidably installed in the bypass groove 22 . The unlocking piston 42 is used to push the locking tongue 31 out of the bypass groove 22 to release the connection between the two.

[0053] When high-temperature and high-pressure gas is generated in the cabinet 1, the limit plate 25 seals the joint between the fixed plate 21 and the pressure relief plate 24. The high-temperature and high-pressure gas enters from the bottom opening of the bypass groove 22, driving the unlocking piston 42 to move toward the lock tongue 31, thereby driving the lock tongue 31 to move toward the lock hole 27 until the lock tongue 31 is separated from the bypass groove 22, and then the high-temperature and high-pressure gas can drive the pressure relief plate 24 to rotate upward, and then the high-temperature and high-pressure gas can be quickly discharged from the square through hole in the center of the fixed plate 21.

[0054] The unlocking assembly 4 further includes a return spring 41 , which is clamped and installed in the bypass groove 22 and is located behind the unlocking piston 42 .

[0055] The elastic force of the return spring 41 can prevent the unlocking piston 42 from blocking the opening below the bypass groove 22 , thereby facilitating the high-temperature and high-pressure gas to enter the bypass groove 22 .

[0056] A pressure relief passage 43 is formed through the unlocking piston 42 , and the pressure relief passage 43 is L-shaped.

[0057] When the high-temperature and high-pressure gas drives the unlocking piston 42 to move toward the locking tongue 31, the return spring 41 is stretched. When the unlocking piston 42 completely pushes the locking tongue 31 out of the bypass groove 22, the upper opening of the pressure relief channel 43 is aligned with the upper opening of the bypass groove 22. At this time, the high-temperature and high-pressure gas in the bypass groove 22 enters the upper opening of the bypass groove 22 through the pressure relief channel 43 and is then discharged to the outside. The pressure in the bypass groove 22 is reduced. At this time, the elastic force of the return spring 41 can prevent the unlocking piston 42 from being pushed out of the bypass groove 22.

[0058] A protective cover 5 is provided above the pressure relief device 2 , and through holes are provided on the top and back of the protective cover 5 .

[0059] The protective cover 5 is fixedly mounted on the top surface of the fixing plate 21 by metal screws. The protective cover 5 is used to prevent the pressure relief plate 24 from flying out and to limit the discharge direction of the high pressure gas.

[0060] Working principle:

[0061] When a short circuit fault occurs inside the cabinet 1, a large amount of high-temperature and high-pressure gas is generated. At this time, the limit plate 25 seals the joint between the fixed plate 21 and the pressure relief plate 24. The high-temperature and high-pressure gas can only enter from the bottom opening of the bypass groove 22. The pressure at the rear of the bypass groove 22 increases, and the high-temperature and high-pressure gas drives the unlocking piston 42 to move toward the lock tongue 31, thereby driving the lock tongue 31 to move toward the lock hole 27 until the lock tongue 31 is separated from the bypass groove 22.

[0062] When the locking tongue 31 is completely pushed out of the bypass groove 22, the upper opening of the pressure relief channel 43 is aligned with the upper opening of the bypass groove 22. At this time, the high-temperature and high-pressure gas in the bypass groove 22 enters the upper opening of the bypass groove 22 through the pressure relief channel 43 and is then discharged to the outside. The pressure in the bypass groove 22 is reduced. At this time, the elastic force of the return spring 41 can prevent the unlocking piston 42 from being pushed out of the bypass groove 22.

[0063] Since the bypass groove 22 is relatively small, the pressure cannot be completely discharged. At this time, the high-temperature and high-pressure gas can drive the pressure relief plate 24 to rotate upward, and then the high-temperature and high-pressure gas can be quickly discharged from the square through hole in the center of the fixed plate 21, enter the protective cover 5, and then be discharged from the through holes on the top and back of the protective cover 5. This can avoid causing damage to the staff in front of the cabinet 1.

[0064] When the pressure relief plate 24 rotates upward, the rotation limit plate 26 will rotate upward with the pressure relief plate 24 until the bottom of the rotation limit plate 26 abuts against the limit plate 25, thereby stopping the rotation, and then stopping the rotation of the pressure relief plate 24, thereby limiting the rotation angle of the pressure relief plate 24. At the same time, the rotation limit plate 26 can limit the high-pressure gas from being discharged from both sides of the pressure relief plate 24.

[0065] After the pressure relief is completed, the unlocking piston 42 returns to its original position under the elastic force of the return spring 41. After eliminating the short circuit fault, the protective cover 5 is removed.

[0066] Applying a force toward the locking spring 33 to the unlocking stud 32 can drive the locking tongue 31 to slide in the direction of the locking spring 33, compressing the locking spring 33. When the unlocking stud 32 slides to the rear end of the limiting groove 28, the locking tongue 31 is completely received in the lock hole 27.

[0067] Then the pressure relief plate 24 is rotated downward until the bottom surface of the pressure relief plate 24 abuts against the limiting plate 25 .

[0068] The force applied to the unlocking stud 32 is released, and the elastic force of the locking spring 33 drives the locking tongue 31 to slide outside the locking hole 27. The locking tongue 31 is inserted into the bypass groove 22, and cooperates with the limiting plate 25 to limit the rotation of the pressure relief plate 24.

[0069] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-safety power distribution cabinet with automatic pressure relief function, characterized in that: include: A cabinet (1), wherein various power distribution equipment is installed in the cabinet (1), a plurality of pressure relief devices (2) are arranged above the cabinet (1) through a top frame (14), a plurality of reinforcing beams (15) are arranged in the top frame (14), and the reinforcing beams (15) divide the interior of the top frame (14) into a plurality of spaces, each pressure relief device (2) corresponding to one space; The pressure relief device (2) comprises a fixed plate (21), a pressure relief plate (24) is rotatably mounted at the center of the fixed plate (21) via a rotating cover plate (23), a bypass groove (22) is provided on one side of the fixed plate (21) close to the locking component (3), the bypass groove (22) has three openings, the head of the pressure relief plate (24) is fixedly connected to the side opening of the bypass groove (22) via the locking component (3), and an unlocking component (4) is provided in the bypass groove (22); The locking assembly (3) comprises a locking tongue (31), and the locking tongue (31) is connected to the bypass groove (22) to achieve locking of the rotating cover plate (23); The unlocking assembly (4) comprises an unlocking piston (42), wherein the unlocking piston (42) is slidably mounted in the bypass groove (22), and the unlocking piston (42) is used to push the locking tongue (31) out of the bypass groove (22) to release the connection between the two; A protective cover (5) is provided above the pressure relief device (2), and through holes are provided on the top and back of the protective cover (5). The protective cover (5) is used to prevent the pressure relief plate (24) from flying out and to limit the discharge direction of the high-pressure gas.

2. A high-safety power distribution cabinet with automatic pressure relief function as claimed in claim 1, characterized in that: A limiting plate (25) is provided below the joint between the fixing plate (21) and the pressure relief plate (24), and the limiting plate (25) is used for sealing the joint between the fixing plate (21) and the pressure relief plate (24).

3. A high-safety power distribution cabinet with automatic pressure relief function as claimed in claim 2, characterized in that: A rotation limit plate (26) is provided below the pressure relief plate (24). The rotation limit plate (26) is fan-shaped and is used to limit the angle at which the pressure relief plate (24) rotates upward.

4. A high-safety power distribution cabinet with automatic pressure relief function as claimed in claim 3, characterized in that: A plurality of locking holes (27) are provided on a side of the pressure relief plate (24) away from the rotating cover plate (23), and a limiting groove (28) is provided above the locking holes (27).

5. A high-safety power distribution cabinet with automatic pressure relief function as claimed in claim 4, characterized in that: The lock tongue (31) is slidably mounted in the lock hole (27); an unlocking stud (32) is provided above the rear end of the lock tongue (31); the unlocking stud (32) passes through the limiting groove (28); a locking spring (33) is provided at the rear end of the lock tongue (31); and the locking spring (33) is located in the lock hole (27).

6. A high-safety power distribution cabinet with automatic pressure relief function as claimed in claim 1, characterized in that: The unlocking assembly (4) further comprises a return spring (41), wherein the return spring (41) is fixedly installed in the bypass groove (22) and is located behind the unlocking piston (42).

7. A high-safety power distribution cabinet with automatic pressure relief function as claimed in claim 6, characterized in that: A pressure relief passage (43) is provided through the unlocking piston (42), and the pressure relief passage (43) is L-shaped.

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