Explosion-proof box with pressure relief function

Abstract

The utility model discloses an explosion-proof box with a pressure relief function, which comprises a box body, a pressure relief main body is arranged at the top of the box body, and a first pressure relief channel, a second pressure relief channel and a third pressure relief channel are arranged in the pressure relief main body. A first blocking and buffering through hole is formed in the upper portion of the first pressure relief channel and the upper portion of the second pressure relief channel, a second blocking and buffering through hole is formed in the lower portion of the second pressure relief channel and the lower portion of the third pressure relief channel, a guiding part expanding outwards is arranged at an inlet of the first pressure relief channel, and a plurality of first pressure relief plates are arranged on the third pressure relief channel from top to bottom. Through the multiple U-shaped pressure relief channels, the travel path distance of high-pressure gas is greatly increased, the travel path speed of the high-pressure gas is reduced, through the staggered pressure relief holes, the travel path distance and speed of the high-pressure gas are further increased, damage of shock waves to the surrounding environment is reduced, and the product has the advantage of having the pressure relief function.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of explosion -proof box, especially with a pressure relief function's explosion -proof box. BACKGROUND

[0002] The explosion -proof box body is a kind of special box structure, has enough mechanical strength, both can withstand the explosion pressure generated by the internal mixed gas flow or flammable explosive substance is detonated, also can prevent the internal explosion flame and high-temperature gas flow after the intermixing of explosion clearance ignites the explosive mixture around the shell. Therefore, it is often used to separate the device that can produce spark or electric arc from the outside explosive gas flow environment, so that electrical equipment can be safely applied in explosive hazardous environment.

[0003] When improper operation, electrostatic discharge, material instability and external fire invasion and other reasons cause sparks, high temperature or mechanical impact in the explosion -proof box body, explosion may occur inside the box. Extremely high impact pressure wave will be generated in the explosion moment, if the high pressure cannot be released in a very short time, the time of pressure action will be lengthened, and the damage to the box is more serious, which can directly lead to the rupture of the box, once the box is broken, the explosion and high pressure in the box will be ejected, increase the harm to the surrounding environment and personnel, therefore, the applicant has made beneficial design, found the method to solve the above problems, the technical scheme to be introduced below is generated in this background. SUMMARY

[0004] The utility model discloses a kind of explosion -proof boxes with pressure relief function, which is to overcome the deficiency of the design of the above-mentioned traditional explosion -proof box.

[0005] An explosion -proof box with pressure relief function, comprising a box body, a pressure relief body is arranged on the top of the box body, characterized in that: a first pressure relief channel, a second pressure relief channel and a third pressure relief channel are arranged in the pressure relief body, a first blocking and buffering hole is arranged above the first pressure relief channel and the second pressure relief channel, a second blocking and buffering hole is arranged below the second pressure relief channel and the third pressure relief channel, a guide part extending outward is arranged at the inlet of the first pressure relief channel, a plurality of first pressure relief plates are arranged in the third pressure relief channel from top to bottom, a second pressure relief plate is arranged between every two first pressure relief plates, the first pressure relief plates and the second pressure relief plates are provided with a plurality of pressure relief holes and are arranged alternately.

[0006] Preferably, the pressure relief body is provided with a baffle abutting against the top of the box body, and a protective sleeve is arranged at each corner of the baffle, and a cavity is arranged in the protective sleeve.

[0007] Preferably, the upper side of the pressure relief body is provided with a liftable dustproof plate, four corners of the dustproof plate are provided with guide rods, the guide rods pass through the box body and the baffle, the ends of the guide rods are provided with stop rings and are slidingly arranged in cavities, the stop rings are provided with springs and abut against the baffle, so that the dustproof plate tightly abuts against the top of the box body.

[0008] Preferably, the first pressure relief plate and the second pressure relief plate are provided with a cushion block.

[0009] Preferably, the first pressure relief channel, the first pressure relief channel and the second pressure relief channel, the second pressure relief channel and the second pressure relief channel and the third pressure relief channel form a U shape. Beneficial effects

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] When the box body is exploded, high-pressure gas enters the first pressure relief channel through the guide part, when the high-pressure gas passes through the first pressure relief hole, the bending structure prolongs the running distance of the high-pressure gas, and then reduces the running speed of the high-pressure gas, which is the first speed reduction; when the high-pressure gas enters the second pressure relief channel and passes through the second pressure relief hole, the speed of the high-pressure gas is further reduced, which is the second speed reduction; when the high-pressure gas enters the third pressure relief channel and passes through the pressure relief holes arranged in a staggered manner, the running distance and speed of the high-pressure gas are further prolonged, which is the third speed reduction; through the above-mentioned design of reducing the speed of the high-pressure gas for multiple times, the high-pressure gas in the box body is slowly released, the damage of the shock wave to the surrounding environment is reduced, and the product has the advantage of pressure relief function. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a sectional structure diagram of the explosion-proof box with the pressure relief function of the utility model Figure 1 ;

[0013] Figure 2 It is a sectional structure diagram of the explosion-proof box with the pressure relief function of the utility model Figure 1 ;

[0014] Figure 3 It is a sectional structure diagram of the explosion-proof box with the pressure relief function of the utility model Figure 2 ;

[0015] Figure 4 It is a sectional structure diagram of the explosion-proof box with the pressure relief function of the utility model Figure 3 ;

[0016] Figure 5 It is an exploded view of the explosion-proof box with the pressure relief function of the utility model.

[0017] The correspondence between the reference signs and the component names in the drawings is as follows:

[0018] Reference sign: 1, box body; 2, pressure relief main body; 3, first pressure relief plate; 4, second pressure relief plate; 5, pressure relief hole; 6, protective sleeve; 7, dustproof plate; 8, cushion block; 21, first pressure relief channel; 22, second pressure relief channel; 23, third pressure relief channel; 24, first resistance and delay through hole; 25, second resistance and delay through hole; 26, guide part; 27, baffle; 61, cavity; 71, guide rod; 72, baffle ring; 73, spring. DETAILED DESCRIPTION

[0019] The technical solutions of the utility model will be described below in conjunction with the embodiments, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0020] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms such as 'up', 'down', 'left', 'right' in the utility model is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0021] In the embodiments of the utility model, 'and / or' is only a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. In addition, the character ' / ' in this paper generally represents that the front and rear associated objects are a kind of 'or' relationship.

[0022] Reference Example Figures 1 to 5The application discloses an explosion-proof box with a pressure relief function, which comprises a box body 1, wherein the top of the box body 1 is provided with a pressure relief main body 2, the pressure relief main body 2 is internally provided with a first pressure relief channel 21, a second pressure relief channel 22 and a third pressure relief channel 23, the first pressure relief channel 21 and the upper portion of the second pressure relief channel 22 are provided with a first resistance and buffering through hole 24, the second pressure relief channel 22 and the lower portion of the third pressure relief channel 23 are provided with a second resistance and buffering through hole 25, the inlet of the first pressure relief channel 21 is provided with an outwardly expanding guide part 26, the third pressure relief channel 23 is provided with a plurality of first pressure relief plates 3 from top to bottom, a second pressure relief plate 4 is arranged between every two first pressure relief plates 3, the first pressure relief plate 3 and the second pressure relief plate 4 are provided with a plurality of pressure relief holes 5 and are arranged in a staggered mode, when explosion occurs in the box body 1, high-pressure gas enters the first pressure relief channel 21 quickly through the guide part 26, when the high-pressure gas passes through the first resistance and buffering through hole 24, the bending structure prolongs the running distance of the high-pressure gas, thereby reducing the running speed of the high-pressure gas, which is the first speed reduction; when the high-pressure gas enters the second pressure relief channel 22 and passes through the second resistance and buffering through hole 25, the speed of the high-pressure gas is further reduced, which is the second speed reduction; when the high-pressure gas enters the third pressure relief channel 23 and passes through the pressure relief holes 5 arranged in a staggered mode, the running distance and speed of the high-pressure gas are further prolonged, which is the third speed reduction, through the above-mentioned design of reducing the speed of the high-pressure gas for multiple times, the high-pressure gas in the box body 1 is slowly released, and the damage of the shock wave to the surrounding environment is reduced.

[0023] It is worth mentioning that the pressure relief main body 2 is provided with a baffle 27 and abuts against the top of the box body 1, the four corners of the baffle 27 are provided with protective sleeve pipes 6, the protective sleeve pipes 6 are internally provided with cavities 61, a plurality of fastening screws are arranged on the baffle 27, the pressure relief main body 2 is connected and fixed with the box body 1, the protective sleeve pipes 6 prevent the impact pressure wave from impacting and damaging the spring 73 and the guide rod 71, thereby protecting the spring 73 and the guide rod 71.

[0024] It is worth mentioning that the upper portion of the pressure relief main body 2 is provided with a liftable dustproof plate 7, the four corners of the dustproof plate 7 are provided with guide rods 71 and pass through the box body 1 and the baffle 27, the tail ends of the guide rods 71 are provided with stop rings 72 and are arranged in a sliding mode in the cavities 61, the stop rings 72 are provided with springs 73 and abut against the baffle 27, so that the dustproof plate 7 is tightly abutted against the top of the box body 1, when the high-pressure gas after speed reduction impacts the dustproof plate 7, the high-pressure gas is bent and runs in an irregular direction around, thereby further buffering the release speed of the impact pressure wave and pushing the dustproof plate 7 to move upwards, the spring 73 is extruded by the stop ring 72 and stores energy, when the pressure relief is completed, the spring 73 releases the elastic force and tightly presses the dustproof plate 7 on the top of the third pressure relief channel 23, so that the dustproof plate 7 prevents the dust from blocking the pressure relief holes 5.

[0025] It is worth mentioning that the first pressure relief plate 3 and the second pressure relief plate 4 are provided with a spacer 8, the spacer 8 keeps the distance of the running of the high-pressure gas between the first pressure relief plate 3 and the second pressure relief plate 4.

[0026] It is worth mentioning that the first pressure relief channel 21 and the first resistance and delay through hole 24, the second pressure relief channel 22 and the second resistance and delay through hole 25, and the third pressure relief channel 23 constitute a U-shaped structure. When the high-pressure gas passes through the curved channel of the U-shaped structure, due to the inertial effect, the high-pressure gas on the outside of the curved channel is subjected to the action of centrifugal force, causing the high-pressure gas to move outward, while the inside is subjected to the action of centripetal force. This uneven pressure distribution can cause the high-pressure gas to generate vortex and rotation at the curved part, thereby increasing the resistance of the gas.

[0027] The above design scheme can realize the product with the pressure relief function.

[0028] The above content is further detailed in combination with the specific embodiments of the utility model, and cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, which should be regarded as belonging to the protection range determined by the claims submitted by the utility model.

Claims

1. An explosion-proof box with pressure relief function, comprising a box body (1), a pressure relief main body (2) is arranged on the top of the box body (1), characterized in that: The pressure relief body (2) is internally provided with a first pressure relief channel (21), a second pressure relief channel (22) and a third pressure relief channel (23), the first pressure relief channel (21) and the second pressure relief channel (22) are provided with a first blocking and buffering through hole (24) at the top, the second pressure relief channel (22) and the third pressure relief channel (23) are provided with a second blocking and buffering through hole (25) at the bottom, the inlet of the first pressure relief channel (21) is provided with an outwardly expanding guide part (26), the third pressure relief channel (23) is provided with a plurality of first pressure relief plates (3) from top to bottom, and a second pressure relief plate (4) is arranged between every two first pressure relief plates (3), the first pressure relief plate (3) and the second pressure relief plate (4) are provided with a plurality of pressure relief holes (5) and are arranged alternately.

2. The explosion-proof box with pressure relief function according to claim 1, characterized in that: The pressure relief body (2) is provided with a baffle (27) and abuts against the top of the box body (1), the four corners of the baffle (27) are provided with a protective sleeve (6), and the protective sleeve (6) is internally provided with a cavity (61).

3. The explosion-proof box with pressure relief function according to claim 2, characterized in that: The top of the pressure relief body (2) is provided with a liftable dustproof plate (7), the four corners of the dustproof plate (7) are provided with a guide rod (71) and pass through the box body (1) and the baffle (27), the end of the guide rod (71) is provided with a blocking ring (72) and is slidingly arranged in the cavity (61), the blocking ring (72) is provided with a spring (73) and abuts against the baffle (27), so that the dustproof plate (7) is tightly abutted against the top of the box body (1).

4. The explosion-proof box with pressure relief function according to claim 1, characterized in that: The first pressure relief plate (3) and the second pressure relief plate (4) are provided with a cushion block (8).

5. The explosion-proof box with pressure relief function according to claim 1, characterized in that: The first pressure relief channel (21), the first blocking and buffering through hole (24), the second pressure relief channel (22), the second blocking and buffering through hole (25) and the third pressure relief channel (23) form a U shape.

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