Pressure relief device of switch cabinet

Abstract

The utility model discloses a pressure relief device of a switch cabinet, and relates to the technical field of switch cabinets. The pressure relief device comprises a pressure relief cover, a pressure relief rotating piece, a one-way limiting piece, a buffer cylinder and a positioning piece, the pressure relief rotating piece is rotationally installed in the pressure relief cover and comprises a rotating rod and a pressure relief plate, and the left end and the right end of the rotating rod are rotationally connected with the interior of the pressure relief cover. According to the utility model, the pressure relief plate and the rotating rod rotate along the axial direction, when the pressure of the switch cabinet is relieved, high-pressure airflow passes through the pressure relief through groove and needs to continuously push the rotating rod and the pressure relief plate to rotate, so that part of impact is absorbed, the impact of the high-pressure airflow to the outside is reduced, and damage to other objects is avoided; and the stirring plate stirs in the buffer solution to improve the resistance, so that the impact of the high-pressure air flow penetrating through the pressure relief through groove is further absorbed, the buffer solution can continuously provide the resistance in the rotating process of the stirring plate, and the situation that the buffer part is damaged cannot occur.

Description

TECHNICAL FIELD

[0001] The utility model relates to a switch cabinet technical field, concretely relates to a switch cabinet pressure relief device. BACKGROUND

[0002] The switch cabinet is a kind of electrical equipment, based on the electrical property of switch cabinet, it can generate a large amount of heat when working, heat can be discharged through heat dissipation hole under normal working condition, but if short circuit or other faults occur, high-temperature and high-pressure gas is generated under short-circuit current, and expands in the inside of switch cabinet, so pressure relief channel is arranged on the surface of switch cabinet to relieve pressure, high-pressure gas will flush away the pressure relief plate that is not firmly installed, and pressure is released to the outside.

[0003] The Chinese patent with publication number CN220233829U discloses a high-voltage switch cabinet pressure relief device, which comprises a switch cabinet body, a pressure relief cavity is formed in the inside of the switch cabinet body, and a mouth rim is fixedly connected to the outside of the switch cabinet body, further comprising: a shielding mechanism fixedly connected to the upper end of the switch cabinet body; and an auxiliary supporting mechanism fixedly connected to the top of the shielding mechanism.

[0004] For the disclosed technology, the spring damping component is used to buffer the pressure relief plate, but the impact of high-pressure gas is high, which can easily cause the spring to break or be damaged, resulting in the loss of the buffering effect, and the homing effect of the pressure relief plate cannot be achieved, so there are some defects in use. UTILITY MODEL CONTENTS

[0005] To solve the above problems, the utility model provides a switch cabinet pressure relief device to solve the problem that the spring damping component for buffering the pressure relief plate bears limited impact and the spring breaks or is damaged.

[0006] The utility model discloses in order to realize above-mentioned purpose specifically adopts following technical scheme: a switch cabinet pressure relief device, including pressure relief cover, pressure relief rotating part, one-way limiting piece, buffer cylinder and positioning piece, the inside rotation of pressure relief cover Install pressure relief rotating part, and pressure relief rotating part includes the rotation bar and pressure relief plate, and the left and right ends of rotation bar are rotationally connected with the inside of pressure relief cover, and the surface of rotation bar is fixedly installed with pressure relief plate, and the rotating end of one-way limiting piece is fixedly installed on the surface of rotation bar, and the limiting end of one-way limiting piece is arranged in the inside of pressure relief cover, and buffer cylinder is fixedly installed in the inside of pressure relief cover, and the both ends of rotation bar are inserted into the inside of buffer cylinder, and the inside of buffer cylinder is filled with buffer liquid, and the inside bottom of pressure relief cover is equipped with positioning piece, and the limiting end of positioning piece is attached to the edge of pressure relief plate.

[0007] The surface of the pressure relief cover is provided with a pressure relief slot, a rotating groove and a sliding groove. The pressure relief slot penetrates the pressure relief cover in the front-rear direction. The two groups of rotating grooves are located on the left and right sides of the pressure relief slot. The sliding groove is provided at the bottom of the pressure relief slot. The positioning piece is arranged at the sliding groove.

[0008] The one-way limiting piece comprises a ratchet wheel and a stop pawl, the ratchet wheel is fixedly sleeved on the surface of the rotating rod, the stop pawl is rotatably installed on the inner wall of the pressure relief cover, a torsion spring is arranged at the connecting position of the stop pawl and the pressure relief cover, and a stop block is fixedly installed on the inner wall of the pressure relief cover and abuts against one side of the stop pawl.

[0009] The pressure relief rotating piece further comprises a plurality of groups of push plates, the push plates are fixedly installed on the left and right ends of the rotating rod, the plurality of groups of push plates are arranged in a circular array on the surface of the rotating rod, and the push plates are located in the interior of the buffer cylinder.

[0010] The positioning piece comprises a baffle and a spring, the baffle is L-shaped, the baffle is slidably installed on the inner bottom of the pressure relief cover, a slide rod is fixedly installed on the bottom of the baffle, the slide rod is slidably connected with the pressure relief cover, the bottom of the baffle is fixedly connected with the spring, the free end of the spring is connected with the inner wall of the pressure relief cover, and a magnetic block is embeddedly installed on the front side of the baffle.

[0011] The positioning piece further comprises a rotating shaft, a transmission wheel, a clamping plate and a push plate, a connecting plate is fixedly installed on the bottom of the baffle, the two ends of the rotating shaft are rotatably connected with the connecting plate, the transmission wheel is fixedly sleeved on the surface of the rotating shaft, the clamping plate is slidably installed on the bottom of the baffle, clamping teeth are fixedly installed on the bottom of the clamping plate and are in meshing connection with the transmission wheel, the clamping plate is slidably connected with the inner wall of the pressure relief cover, the push plate is fixedly installed on the surface of the rotating shaft, a groove is formed in the front side of the baffle, and the push plate abuts against the inner wall of the groove.

[0012] The utility model discloses the beneficial effect is as follows:

[0013] The utility model discloses a relief plate and rotating rod rotate along its axial direction, when the switch cabinet relief pressure, high pressure airflow passes through the relief through slot and needs constantly to push the rotating rod, relief plate and rotate, thereby absorbing part impact, alleviate high pressure airflow to the impact of outside world, avoid causing other articles to be damaged, through the rotating rod drive push plate rotates in the interior of buffer cylinder, and push plate stirs in buffer solution, improves resistance, thereby further needs high pressure airflow to pass through the impact of relief through slot, and buffer solution can provide resistance constantly in the process of push plate rotation, and the buffer component will not appear the condition of being damaged, through the abutment of the limiting end of positioning piece and relief plate, when relief plate rotates, the limiting end of positioning piece is pushed by relief plate, thereby descending and contracting, avoid the collision of relief plate and the limiting end of positioning piece of subsequent rotation. ACCURACY OF DRAWINGS

[0014] Figure 1 It is the three -dimensional structure schematic diagram of the utility model discloses;

[0015] Figure 2 It is the rear view schematic diagram of the utility model discloses;

[0016] Figure 3is a first partial sectional view schematic diagram of the utility model;

[0017] Figure 4 is Figure 3 A part enlarged schematic diagram of

[0018] Figure 5 is a second partial sectional view schematic diagram of the utility model;

[0019] Figure 6 is a third partial sectional view schematic diagram of the utility model.

[0020] Sign: 1, pressure relief cover, 2, pressure relief rotating part, 201, rotating rod, 202, pressure relief plate, 203, push plate, 3, one-way limiting part, 301, ratchet, 302, stop pawl, 4, buffer cylinder, 5, positioning part, 501, baffle, 502, spring, 503, rotating shaft, 504, transmission wheel, 505, clamping plate, 506, push plate. Specific implementation

[0021] The utility model will be further explained in combination with specific embodiment, however, people skilled in the art should understand, the detailed description given in combination with the drawings here is to explain better, the structure of the utility model must exceed the limited these embodiments, and for some equivalent alternative or common means, this paper will not make detailed description, but still belongs to the protection scope of the application.

[0022] Figures 1-6 is the best embodiment of the utility model, the following will be combined with the drawings Figure 1 - attachment Figure 6 The utility model will be further explained.

[0023] A switchgear pressure relief device, including pressure relief cover 1, pressure relief rotating part 2, one-way limiting part 3, buffer cylinder 4 and positioning part 5, the inside rotation of pressure relief cover 1 is installed with pressure relief rotating part 2, and pressure relief rotating part 2 includes rotating rod 201 and pressure relief plate 202, and the left and right ends of rotating rod 201 are rotationally connected with the inside of pressure relief cover 1, and the surface of rotating rod 201 is fixedly installed with pressure relief plate 202, the number of pressure relief plate 202 is three groups, and three groups of pressure relief plate 202 are arranged in circular array on the surface of rotating rod 201, and the rotating end of one-way limiting part 3 is fixedly installed on the surface of rotating rod 201, and the limiting end of one-way limiting part 3 is arranged in the inside of pressure relief cover 1, and buffer cylinder 4 is fixedly installed in the inside of pressure relief cover 1, and both ends of rotating rod 201 are inserted into the inside of buffer cylinder 4, and the inside of buffer cylinder 4 is filled with buffer solution, and the inside bottom of pressure relief cover 1 is provided with positioning part 5, and the limiting end of positioning part 5 is attached to the edge of pressure relief plate 202;

[0024] Specifically, the inlet and outlet of the pressure relief cover 1 are closed by the pressure relief plate 202, the impact is buffered during the pressure relief of the switch cabinet by the rotating rod 201 and the pressure relief plate 202, the rotating direction of the rotating rod 201 is limited by the one-way limiting piece 3, the rotation of the rotating rod 201 is buffered by the buffer cylinder 4 to absorb the pressure relief impact, the pressure relief plate 202 is adsorbed and fixed by the positioning piece 5, and the positioning piece 5 is moved away after the pressure relief plate 202 rotates, so as to avoid collision with the pressure relief plate 202.

[0025] The surface of the pressure relief cover 1 is provided with a pressure relief channel, a rotating groove and a sliding groove. The pressure relief channel penetrates through the pressure relief cover 1 in the front-rear direction. The pressure relief plate 202 is attached to the inner wall of the pressure relief channel. The rotating groove is in two groups, and the two groups of rotating grooves are located on the left and right sides of the pressure relief channel. The rotating rod 201 penetrates through the inside of the pressure relief channel and the rotating groove. The one-way limiting piece 3 and the buffer cylinder 4 are arranged in the inside of the rotating groove. The sliding groove is arranged at the bottom of the pressure relief channel. The positioning piece 5 is arranged at the sliding groove.

[0026] Specifically, the high-pressure gas of the switch cabinet is discharged to the outside through the pressure relief channel. The buffer cylinder 4 is filled with buffer liquid through the rotating groove. The positioning piece 5 can be moved downward and shrunk into the channel to avoid collision with the positioning piece 5 when the pressure relief plate 202 rotates.

[0027] The one-way limiting piece 3 includes a ratchet wheel 301 and a stop pawl 302. The ratchet wheel 301 is fixedly installed on the surface of the rotating rod 201. The stop pawl 302 is rotatably installed on the inner wall of the pressure relief cover 1. The connection between the stop pawl 302 and the pressure relief cover 1 is provided with a torsion spring. The inner wall of the pressure relief cover 1 is fixedly installed with a stop block. The stop block is attached to one side of the stop pawl 302.

[0028] Specifically, the stop pawl 302 blocks the ratchet wheel 301 to limit the rotating direction of the ratchet wheel 301, thereby unidirectionally limiting the rotation of the pressure relief rotating piece 2. The torsion spring makes the stop pawl 302 attach to the surface of the ratchet wheel 301. The stop block blocks the stop pawl 302, thereby realizing the function of one-way limiting.

[0029] The pressure relief rotating piece 2 further includes a push plate 203. The push plate 203 is fixedly installed on the left and right ends of the rotating rod 201. The number of push plates 203 is multiple, and the multiple push plates 203 are arranged in a circular array on the surface of the rotating rod 201. The push plate 203 is located in the inside of the buffer cylinder 4.

[0030] Specifically, the push plate 203 stirs in the inside of the buffer cylinder 4, so that the buffer liquid of the buffer cylinder 4 applies resistance to the push plate 203.

[0031] The positioning piece 5 comprises a baffle 501 and a spring 502, the baffle 501 is L-shaped, the baffle 501 is slidingly installed at the inner bottom of the pressure relief cover 1, a slide rod is fixedly installed at the bottom of the baffle 501, the slide rod is slidingly and telescopically arranged with the pressure relief cover 1, the spring 502 is fixedly connected to the bottom of the baffle 501, the free end of the spring 502 is connected to the inner wall of the pressure relief cover 1, a magnetic block is embeddedly installed at the front side of the baffle 501, and the magnetic block is correspondingly arranged with the pressure relief plate 202.

[0032] Specifically, the baffle 501 is attached to the rear side of the pressure relief plate 202 to block the rear rotation of the pressure relief plate 202, the magnetic block of the baffle 501 is used to adsorb and fix the pressure relief plate 202, and the spring 502 and the slide rod are used to apply a downward pulling force to the baffle 501.

[0033] The positioning piece 5 further comprises a rotating shaft 503, a transmission wheel 504, a clamping plate 505 and a push plate 506, the bottom of the baffle 501 is fixedly installed with a connecting plate, the two ends of the rotating shaft 503 are rotationally connected with the connecting plate, the transmission wheel 504 is fixedly and sleevedly installed on the surface of the rotating shaft 503, the clamping plate 505 is slidingly installed at the bottom of the baffle 501, clamping teeth are fixedly installed at the bottom of the clamping plate 505, the clamping teeth are meshingly and connectingly arranged with the transmission wheel 504, the clamping plate 505 is slidingly and telescopically arranged with the inner wall of the pressure relief cover 1, the push plate 506 is fixedly installed on the surface of the rotating shaft 503, the push plate 506 is correspondingly arranged with the pressure relief plate 202, a groove is formed at the front side of the baffle 501, and the push plate 506 is attached to the inner wall of the groove.

[0034] Specifically, the push plate 506 is attached to the pressure relief plate 202, so that the push plate 506 slides in the groove when the pressure relief plate 202 rotates, the rotating shaft 503 drives the transmission wheel 504 to rotate, and the transmission wheel 504 drives the clamping plate 505 to slide at the bottom of the baffle 501.

[0035] In summary: the utility model discloses when using, the staff installs to the surface of switch cabinet with pressure relief cover 1, and the electric element that can appear the problem of failure in switch cabinet is aligned with pressure relief groove, if short circuit or other failure appears, under the short circuit current, high temperature high pressure gas is produced in the moment, expands in the inside of switch cabinet, and gas contacts pressure relief plate 202, because the back side of baffle 501 is attached to pressure relief plate 202, and ratchet wheel 301 and stop jaw 302 are opposite to the one-way location of rotating rod 201, make that pressure relief rotating part 2 can only rotate in one direction, and gas pushes pressure relief plate 202 to make it separate from the magnetic block of baffle 501, and pressure relief plate 202 pushes push plate 506 to make rotating shaft 503 rotate, and rotating shaft 503 drives transmission wheel 504 to rotate, and transmission wheel 504 pushes clamping plate 505 to slide forward, make that clamping plate 505 separates from the inner wall of pressure relief cover 1, and the location of baffle 501 is released, and baffle 501 is slid down by spring 502, and baffle 501 is slid into the sliding slot inside pressure relief cover 1, avoid the collision between pressure relief plate 202 and baffle 501, when gas is discharged outward, pressure relief plate 202 and rotating rod 201 need to be continuously pushed to rotate, and part of impact is absorbed, and rotating rod 201 drives push plate 203 to rotate in the inside of buffer cylinder 4, and buffer liquid in buffer cylinder 4 is stirred, and buffer liquid continuously applies resistance to rotating rotating rod 201, further absorbs part of impact, and the effect of sufficient buffering is achieved, and the influence of high pressure gas on external objects is reduced, and after pressure relief is completed, pressure relief plate 202 can be rotated to reset it, and baffle 501 and push plate 506 are reset, make that clamping plate 505 is inserted into the inner wall of pressure relief cover 1, and baffle 501 is fixed.

[0036] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms, and any skilled person in the art can change or modify the equivalent embodiment with the disclosed technical content. However, any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model without departing from the technical scheme of the utility model still belongs to the protection scope of the utility model technical scheme.

Claims

1. A pressure relief device for a switchgear, characterized in that, The pressure relief cover (1), pressure relief rotating component (2), one-way limiting component (3), buffer cylinder (4) and positioning component (5) are included. The pressure relief rotating component (2) is rotatably installed inside the pressure relief cover (1). The pressure relief rotating component (2) includes a rotating rod (201) and a pressure relief plate (202). The left and right ends of the rotating rod (201) are rotatably connected to the pressure relief cover (1) inside. The pressure relief plate (202) is fixedly installed on the surface of the rotating rod (201). The rotating end of the one-way limiting component (3) is fixedly installed on the surface of the rotating rod (201). The limiting end of the one-way limiting component (3) is set inside the pressure relief cover (1). The buffer cylinder (4) is fixedly installed inside the pressure relief cover (1). The two ends of the rotating rod (201) are inserted into the inside of the buffer cylinder (4). The inside of the buffer cylinder (4) is filled with buffer solution. The positioning component (5) is provided at the bottom of the inner side of the pressure relief cover (1). The limiting end of the positioning component (5) is attached to the edge of the pressure relief plate (202).

2. The switchgear pressure relief device according to claim 1, characterized in that, The surface of the pressure relief cover (1) is provided with a pressure relief groove, a rotating groove and a sliding groove. The pressure relief groove runs through the pressure relief cover (1) in the front-to-back direction. There are two sets of rotating grooves, and the two sets of rotating grooves are located on the left and right sides of the pressure relief groove. The sliding groove is opened at the bottom of the pressure relief groove, and the positioning element (5) is set at the sliding groove.

3. The switchgear pressure relief device according to claim 1, characterized in that, The one-way limiting component (3) includes a ratchet (301) and a stop pawl (302). The ratchet (301) is fixedly mounted on the surface of the rotating rod (201), and the stop pawl (302) is rotatably mounted on the inner wall of the pressure relief cover (1). A torsion spring is provided at the connection between the stop pawl (302) and the pressure relief cover (1), and a stop block is fixedly mounted on the inner wall of the pressure relief cover (1). The stop block fits against one side of the stop pawl (302).

4. A switchgear pressure relief device according to claim 1, characterized in that, The pressure relief rotating component (2) also includes a lever (203), which is fixedly installed on the left and right ends of the rotating rod (201). There are multiple sets of levers (203), and the multiple sets of levers (203) are arranged in a circular array on the surface of the rotating rod (201). The levers (203) are located inside the buffer cylinder (4).

5. A switchgear pressure relief device according to claim 1, characterized in that, The positioning component (5) includes a baffle (501) and a spring (502). The baffle (501) is L-shaped and is slidably installed on the bottom inner side of the pressure relief cover (1). A sliding rod is fixedly installed on the bottom of the baffle (501). The sliding rod is slidably inserted into the pressure relief cover (1). A spring (502) is fixedly connected to the bottom of the baffle (501). The free end of the spring (502) is connected to the inner wall of the pressure relief cover (1). A magnetic block is embedded in the front side of the baffle (501).

6. A switchgear pressure relief device according to claim 5, characterized in that, The positioning component (5) also includes a rotating shaft (503), a transmission wheel (504), a clamping plate (505), and a push plate (506). A connecting plate is fixedly installed at the bottom of the baffle (501). The two ends of the rotating shaft (503) are rotatably connected to the connecting plate. The transmission wheel (504) is fixedly installed on the surface of the rotating shaft (503). The clamping plate (505) is slidably installed at the bottom of the baffle (501). The clamping plate (505) has a clamping tooth fixedly installed at the bottom, and the clamping tooth is meshed with the transmission wheel (504). The clamping plate (505) is slidably inserted into the inner wall of the pressure relief cover (1). The push plate (506) is fixedly installed on the surface of the rotating shaft (503). A groove is opened on the front side of the baffle (501), and the push plate (506) fits against the inner wall of the groove.

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