Pressure relief protection structure of switch cabinet

Abstract

The utility model provides a pressure relief protection structure of a switch cabinet, which belongs to the technical field of pressure relief of the switch cabinet and comprises a cabinet door, a pressure relief mechanism is mounted on the front surface of the cabinet door, two connecting hinges are mounted on one side of the cabinet door, two limiting blocks are mounted on the back surface of the cabinet door, buffer mechanisms are slidably connected to the surfaces of the limiting blocks, and the buffer mechanisms are slidably connected to the surfaces of the limiting blocks. According to the scheme, a gap is formed between the protection plate and the cabinet door, heat dissipation can be conducted on the switch cabinet when the pressure relief protection structure is normally used, then hot air is discharged through the pressure relief mechanism, and when hydraulic pressure is generated, the pressure relief protection structure is not prone to falling off. A large amount of gas is discharged through the pressure relief mechanism and exerts acting force on the protection plate, so that the gap between the protection plate and the cabinet door is increased, meanwhile, holes can be increased by adjusting the positions of the pressure relief plate and the barrier plate, pressure relief is accelerated, and a dustproof net can prevent dust from entering the switch cabinet.

Description

Technical Field

[0001] The utility model belongs to the technical field of switch cabinet pressure relief, and in particular relates to a switch cabinet pressure relief protection structure. Background Art

[0002] During the operation of the switch cabinet, due to insulation aging, human operating errors, switch cabinet design defects, etc., a short circuit fault may occur in the primary circuit, generating a short-circuit current of tens of thousands of amperes. This short-circuit current will instantly generate high-temperature and high-pressure gas. Since the cabinet body is relatively narrow, if the faulty airflow cannot be effectively released in a short time, it will cause the switch cabinet to explode, causing serious damage to adjacent switch cabinets and personnel, and causing major safety accidents.

[0003] The existing public application number is CN201420338964.2, and the public name is a switch cabinet pressure relief protection structure, a switch cabinet door, and a switch cabinet. One of the switch cabinet pressure relief protection structures includes a protective plate movably arranged on the inner side of the heat dissipation port on the switch cabinet, the protective plate has a pressure relief blocking position for moving toward the heat dissipation port to a set position to block the heat dissipation port, and also has a heat dissipation opening position for moving away from the heat dissipation port to open the heat dissipation port, and an elastic member is provided between the protective plate and the cabinet wall of the switch cabinet to apply a force to the protective plate to move toward the heat dissipation opening position, and the elastic member has a set stiffness for being deformed under the action of the protective plate when the switch cabinet is depressurized so that the protective plate moves to the pressure relief blocking position.

[0004] Although when the above-mentioned protective structure operates normally, the protective plate is open and the heat dissipation airflow can pass normally; when the switch cabinet is depressurized, the protective plate overcomes the force of the elastic part and moves to the pressure relief blocking position to block the heat dissipation port, thereby preventing the fault airflow from ejecting from the heat dissipation port and ensuring the safety of the operator, the above-mentioned protective structure cannot seal the switch cabinet in time after the pressure is relieved, and needs to be replaced before it can be put into operation again, which is very inconvenient. During this period, dust will easily enter the switch cabinet and contaminate the high-voltage conductor, affecting the internal insulation strength and increasing short-circuit faults. Utility Model Content

[0005] The utility model aims to provide a switch cabinet pressure relief protection structure, aiming to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A switch cabinet pressure relief protection structure comprises: a cabinet door, a pressure relief mechanism is installed on the front surface of the cabinet door, two connecting hinges are installed on one side of the cabinet door, two limit blocks are installed on the back of the cabinet door, a buffer mechanism is slidably connected to the surface of the limit block, a protective plate is provided on the inner side of the buffer mechanism, a dust net is provided between the protective plate and the pressure relief mechanism, the pressure relief mechanism comprises a mounting frame installed on the front face of the cabinet door, a pressure relief plate is provided on the surface of the mounting frame, and a blocking plate is provided on the outer side of the pressure relief plate.

[0008] As a preferred solution of the utility model, the pressure relief mechanism also includes a threaded rod rotatably connected to one side of the inner wall of the mounting frame and a servo motor installed on one side of the top of the mounting frame, and the output shaft of the servo motor is fixedly connected to one end of the threaded rod, and the surface of the threaded rod is threadedly connected to two internal thread blocks, and one side of the internal thread block is fixedly connected to the blocking plate, and the pressure relief plate is adapted to the blocking plate.

[0009] As a preferred solution of the utility model, a guide rod is installed on the other side of the inner wall of the pressure relief plate, and two guide blocks are slidably connected to the surface of the guide rod, and the guide blocks are fixedly connected to the surface of the other side of the blocking plate.

[0010] As a preferred solution of the utility model, the buffer mechanism includes a buffer frame arranged on the surface of the cabinet door, spring telescopic rods are installed on both sides of the inner wall of the buffer frame, a surface moving rod is installed at one end of the inner side of the spring telescopic rod, the surface of the moving rod is rotatably connected with a connecting piece, the other end of the connecting piece is provided with a connecting plate, and the protective plate is fixedly connected to the surface of the connecting plate.

[0011] As a preferred solution of the utility model, a first limiting groove is opened on the surface of both sides of the buffer frame, and the moving rod is slidably connected to the surface of the first limiting groove, and a second limiting groove is opened on the upper surface of the buffer frame, and the connecting piece is slidably connected to the surface of the second limiting groove.

[0012] As a preferred solution of the utility model, the inner wall of the limit block is L-shaped, and the inner wall of the limit block is adapted to the buffer frame.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] In this solution, there is a gap between the protective plate and the cabinet door. The pressure relief protection structure can dissipate heat for the switch cabinet during normal use, and then the hot air is discharged through the pressure relief mechanism. During hydraulic pressure, a large amount of gas discharged through the pressure relief mechanism will exert force on the protective plate, thereby increasing the gap between the protective plate and the cabinet door. At the same time, adjusting the position of the pressure relief plate and the blocking plate can increase the gap, thereby accelerating the pressure relief, and the dust net will prevent dust from entering the interior of the switch cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0016] In the attached picture:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model from a first perspective;

[0018] Figure 2 It is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0019] Figure 3 The utility model structure Figure 2 A magnified view of the local structure at center A;

[0020] Figure 4 It is an exploded diagram of the pressure relief mechanism in the structure of the utility model;

[0021] Figure 5 It is an exploded view of a local structure in the structure of the utility model.

[0022] In the figure: 1. cabinet door; 2. pressure relief mechanism; 201. pressure relief plate; 202. mounting frame; 203. threaded rod; 204. internal thread block; 205. blocking plate; 206. servo motor; 207. guide rod; 208. guide block; 3. connecting hinge; 4. limit block; 5. buffer mechanism; 501. buffer frame; 502. spring telescopic rod; 503. moving rod; 504. connecting piece; 505. connecting plate; 506. first limit slide groove; 507. second limit slide groove; 6. protective plate; 7. dust net. DETAILED DESCRIPTION

[0023] 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.

[0024] Example

[0025] See also Figure 1-5 , the technical solution provided by this embodiment is as follows:

[0026] A switch cabinet pressure relief protection structure comprises: a cabinet door 1, a pressure relief mechanism 2 is installed on the front surface of the cabinet door 1, two connecting hinges 3 are installed on one side of the cabinet door 1, two limit blocks 4 are installed on the back of the cabinet door 1, a buffer mechanism 5 is slidably connected to the surface of the limit block 4, a protective plate 6 is provided on the inner side of the buffer mechanism 5, a dustproof net 7 is provided between the protective plate 6 and the pressure relief mechanism 2, the pressure relief mechanism 2 comprises a mounting frame 202 mounted on the front of the cabinet door 1, a pressure relief plate 201 is provided on the surface of the mounting frame 202, a blocking plate 205 is provided on the outer side of the pressure relief plate 201, and a gap is formed between the protective plate 6 and the cabinet door 1. The pressure relief protection structure can dissipate heat for the switch cabinet during normal use, and then the hot air is discharged through the pressure relief mechanism 2. During hydraulic pressure, a large amount of gas discharged through the pressure relief mechanism 2 will exert a force on the protective plate 6, thereby increasing the gap between the protective plate 6 and the cabinet door 1. At the same time, adjusting the positions of the pressure relief plate 201 and the blocking plate 205 can increase the gap, thereby accelerating the pressure relief, and the dustproof net 7 will prevent dust from entering the interior of the switch cabinet.

[0027] Specifically, the pressure relief mechanism 2 also includes a threaded rod 203 rotatably connected to one side of the inner wall of the mounting frame 202 and a servo motor 206 installed on one side of the top of the mounting frame 202, and the output shaft of the servo motor 206 is fixedly connected to one end of the threaded rod 203, and the surface of the threaded rod 203 is threadedly connected to two internal thread blocks 204, and one side of the internal thread block 204 is fixedly connected to the blocking plate 205, and the pressure relief plate 201 is adapted to the blocking plate 205.

[0028] In a specific embodiment of the present invention, when the servo motor 206 is started, its output shaft drives the mounting frame 202 to rotate, and the rotation of the mounting frame 202 drives the internal thread block 204 and the blocking plate 205 to move, and the pressure relief plate 201 and the blocking plate 205 will be misaligned.

[0029] Specifically, a guide rod 207 is installed on the other side of the inner wall of the pressure relief plate 201 , and two guide blocks 208 are slidably connected to the surface of the guide rod 207 , and the guide blocks 208 are fixedly connected to the surface of the other side of the blocking plate 205 .

[0030] In a specific embodiment of the present invention, the blocking plate 205 moves while driving the guide block 208 to move on the surface of the guide rod 207, thereby increasing the stability of the blocking plate 205 when moving.

[0031] Specifically, the buffer mechanism 5 includes a buffer frame 501 arranged on the surface of the cabinet door 1, and spring telescopic rods 502 are installed on both sides of the inner wall of the buffer frame 501, and a surface moving rod 503 at one end of the inner side of the spring telescopic rod 502, and the surface of the moving rod 503 is rotatably connected with a connecting member 504, and the other end of the connecting member 504 is provided with a connecting plate 505, and the protective plate 6 is fixedly connected to the surface of the connecting plate 505, and the surfaces of both sides of the buffer frame 501 are provided with a first limiting slide groove 506, and the moving rod 503 is slidably connected to the surface of the first limiting slide groove 506, and the upper surface of the buffer frame 501 is provided with a second limiting slide groove 507, and the connecting member 504 is slidably connected to the surface of the second limiting slide groove 507.

[0032] In a specific embodiment of the present invention, the connecting plate 505 will generate an outward force under the action of the protective plate 6. At this time, the connecting plate 505 drives the connecting member 504 to move on the surface of the second limiting slide groove 507 and pulls the moving rod 503. At this time, the moving rod 503 moves on the surface of the first limiting slide groove 506 and pulls the spring telescopic rod 502 to charge it. After the force disappears, the protective plate 6 will be reset under the action of the spring telescopic rod 502.

[0033] Specifically, the inner wall of the limiting block 4 is L-shaped, and the inner wall of the limiting block 4 is adapted to the buffer frame 501 .

[0034] In a specific embodiment of the present utility model, the buffer frame 501 can be limited by the shape of the limiting block 4, and the buffer mechanism 5 can be easily disassembled.

[0035] Working principle: there is a gap between the protective plate 6 and the cabinet door 1. The pressure relief protection structure can dissipate heat for the switch cabinet during normal use, and then the hot air is discharged through the pressure relief mechanism 2. During hydraulic pressure, a large amount of gas is discharged through the pressure relief mechanism 2, which will exert a force on the protective plate 6. The connecting plate 505 will generate an outward force under the action of the protective plate 6. At this time, the connecting plate 505 drives the connecting member 504 to move on the surface of the second limiting slide groove 507 and pulls the moving rod 503. At this time, the moving rod 503 moves on the surface of the first limiting slide groove 506 and pulls the spring telescopic rod 502 to charge it. After the force disappears, the spring telescopic rod 502 will be used to move the connecting member 504. The protective plate 6 is reset to increase the gap between the protective plate 6 and the cabinet door 1, and the servo motor 206 is started at the same time. The output shaft of the servo motor 206 drives the mounting frame 202 to rotate, and the rotation of the mounting frame 202 drives the internal thread block 204 and the blocking plate 205 to move. At this time, the pressure relief plate 201 and the blocking plate 205 will be misaligned, thereby accelerating the pressure relief. When the blocking plate 205 moves, it drives the guide block 208 to move on the surface of the guide rod 207, thereby increasing the stability of the blocking plate 205 when moving, and the dustproof net 7 will prevent dust from entering the interior of the switch cabinet. At the same time, the buffer frame 501 can be moved on the surface of the limit block 4, thereby realizing the disassembly of the buffer frame 501.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A switch cabinet pressure relief protection structure, characterized in that: include: A cabinet door (1), wherein a pressure relief mechanism (2) is installed on the front surface of the cabinet door (1), two connecting hinges (3) are installed on one side of the cabinet door (1), two limit blocks (4) are installed on the back of the cabinet door (1), a buffer mechanism (5) is slidably connected to the surface of the limit block (4), a protective plate (6) is provided on the inner side of the buffer mechanism (5), and a dustproof net (7) is provided between the protective plate (6) and the pressure relief mechanism (2); The pressure relief mechanism (2) comprises a mounting frame (202) mounted on the front of the cabinet door (1); a pressure relief plate (201) is provided on the surface of the mounting frame (202); and a blocking plate (205) is provided on the outer side of the pressure relief plate (201).

2. A switch cabinet pressure relief protection structure according to claim 1, characterized in that: The pressure relief mechanism (2) further comprises a threaded rod (203) rotatably connected to one side of the inner wall of the installation frame (202) and a servo motor (206) installed on one side of the top of the installation frame (202), wherein the output shaft of the servo motor (206) is fixedly connected to one end of the threaded rod (203), two internal thread blocks (204) are threadedly connected to the surface of the threaded rod (203), and one side of the internal thread block (204) is fixedly connected to the blocking plate (205), and the pressure relief plate (201) is adapted to the blocking plate (205).

3. A switch cabinet pressure relief protection structure according to claim 2, characterized in that: A guide rod (207) is installed on the other side of the inner wall of the pressure relief plate (201), and two guide blocks (208) are slidably connected to the surface of the guide rod (207), and the guide blocks (208) are fixedly connected to the surface of the other side of the blocking plate (205).

4. A switch cabinet pressure relief protection structure according to claim 1, characterized in that: The buffer mechanism (5) comprises a buffer frame (501) arranged on the surface of the cabinet door (1), spring telescopic rods (502) are installed on both sides of the inner wall of the buffer frame (501), a surface movable rod (503) is provided at one end of the inner side of the spring telescopic rod (502), the surface of the movable rod (503) is rotatably connected to a connecting piece (504), the other end of the connecting piece (504) is provided with a connecting plate (505), and the protective plate (6) is fixedly connected to the surface of the connecting plate (505).

5. A switch cabinet pressure relief protection structure according to claim 4, characterized in that: The surfaces on both sides of the buffer frame (501) are provided with first limiting sliding grooves (506), and the moving rod (503) is slidably connected to the surface of the first limiting sliding groove (506); the upper surface of the buffer frame (501) is provided with second limiting sliding grooves (507), and the connecting member (504) is slidably connected to the surface of the second limiting sliding groove (507).

6. A switch cabinet pressure relief protection structure according to claim 4, characterized in that: The inner wall of the limit block (4) is L-shaped, and the inner wall of the limit block (4) is adapted to the buffer frame (501).

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