Automatic exhaust type flame arrester for positive pressure cabinet

Abstract

The utility model relates to an automatic exhaust type flame arrester for a positive pressure cabinet, which comprises a square elbow, a conical body, a gravity ball, a flame arresting net and a pressing block, L-shaped rods are mounted on the outer surfaces of the two sides of the conical body, a mounting plate is mounted at the upper ends of the two L-shaped rods, an electric push rod is mounted on the upper surface of the mounting plate, and a cover plate is connected to the end part of the telescopic end of the electric push rod. A motor is installed in the cover plate, a brush plate is installed at the end of an output shaft of the motor, and bristles are arranged on the lower surface of the brush plate. A draught fan is installed on the upper surface of the installation plate, the suction end of the draught fan is connected with a corrugated pipe, and the end of the corrugated pipe is connected with the cover plate. The cover plate covers the upper surface of the pressing block for sealing, the motor is started to drive the brush plate to rotate, dust on the surface of the fire-retardant net can be swept away, the swept-away dust can be sucked away through the suction effect of the draught fan, and therefore the purpose of cleaning the dust on the surface of the fire-retardant net is achieved, the fire-retardant net does not need to be disassembled, and normal and stable operation of the positive pressure cabinet is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of positive pressure cabinets, and particularly relates to an automatic exhaust type flame arrester for a positive pressure cabinet. Background Technique

[0002] A positive pressure cabinet is a cabinet or box used to protect electronic devices from the external environment. Its working principle is to prevent dust, dirt, water vapor, etc. in the external air from entering the cabinet interior by internal pressurization, thereby protecting the devices inside the cabinet from damage by these pollutants. A flame arrester is usually installed on the outer side of the positive pressure cabinet to ensure the safety of the cabinet interior environment.

[0003] Chinese Patent with the publication number CN211410783U discloses an automatic exhaust type flame arrester for a positive pressure cabinet. The flame arrester uses a fireproof net to achieve the function of fire prevention and exhaust, and uses a gravity ball and a conical static pressure cavity of a conical body to achieve the functions of pressure stabilization and automatic exhaust, enabling the positive pressure cabinet to automatically exhaust safely, ensuring that the positive pressure cabinet can effectively replace and exhaust gas during positive pressure operation, and effectively achieving the functions of fire prevention and automatic pressure relief and exhaust during normal operation exhaust, ensuring the internal pressure stabilization of the positive pressure cabinet.

[0004] However, in the above patent, dust is likely to adhere to the surface of the fireproof net. The accumulation of dust may reduce the effective area of the mesh holes, thereby reducing the ability to block flames and hot gases, increasing the fire risk, and the accumulation of dust will also hinder the normal flow of gas, resulting in poor exhaust. This may cause the gas pressure inside the positive pressure cabinet to be unable to be effectively regulated, thereby affecting the positive pressure state and gas discharge effect inside the cabinet, and increasing the risk of equipment failure. However, if the fireproof net needs to be cleaned in the above patent, it needs to be removed. During this process, the positive pressure cabinet loses the protection of the fireproof net, presenting a certain safety hazard. Content of the Utility Model

[0005] The purpose of the utility model is to provide an automatic exhaust type flame arrester for a positive pressure cabinet that can clean the fireproof net without removing it.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows.

[0007] An automatic exhaust type flame arrester for a positive pressure cabinet includes a right-angle elbow, a conical body, a gravity ball, a fireproof net, and a pressing block. L-shaped rods are installed on the outer surfaces of both sides of the conical body. An installation plate is jointly installed at the upper ends of the two L-shaped rods. An electric push rod is installed on the upper surface of the installation plate. The end of the telescopic end of the electric push rod is connected to a cover plate. A motor is installed inside the cover plate. A brush plate is installed at the end of the output shaft of the motor. Brush bristles are arranged on the lower surface of the brush plate. A blower is installed on the upper surface of the installation plate. The suction end of the blower is connected to a corrugated pipe, and the end of the corrugated pipe is connected to the cover plate.

[0008] It can be seen that by covering the upper surface of the pressing block with the cover plate for sealing, at this time, the bristles of the brush plate are in contact with the flame arrester net. By starting the motor to drive the brush plate to rotate, the dust on the surface of the flame arrester net can be cleaned, and through the suction effect of the fan, the swept dust can be sucked away, so as to achieve the purpose of cleaning the dust on the surface of the flame arrester net, and there is no need to remove the flame arrester net, ensuring the normal and stable operation of the positive pressure cabinet.

[0009] Furthermore, shells are installed on the outer surfaces of both sides of the conical body. First through grooves are opened on the inner walls of both sides of the conical body. The first through grooves communicate with the shells. Second through grooves are opened on the outer surface of the shell, and the second through grooves correspond to the first through grooves. A stop block is arranged inside the shell. A guide rod is connected to the lower surface of the stop block, and the end of the guide rod penetrates to the outside of the shell.

[0010] After the cover plate covers the upper surface of the pressing block, in order to avoid the suction of the fan affecting the pressure inside the positive pressure cabinet, the guide rod can be pulled to drive the stop block to move downward. At this time, the second through groove communicates with the first through groove, so that external air can enter the conical body, completing the adsorption of dust by the fan and avoiding the influence on the pressure inside the positive pressure cabinet.

[0011] Furthermore, a spring is installed on the outer surface of the L-shaped rod. The end of the spring is connected to a top plate, and the end of the guide rod is connected to the top plate.

[0012] During normal use, the spring can continuously apply an upward thrust to the guide rod, so that the stop block can always be in the position of blocking the second through groove and the first through groove.

[0013] Furthermore, L-shaped pressing rods are installed on the outer surfaces of both sides of the cover plate, and the two L-shaped pressing rods correspond to the two top plates respectively.

[0014] When the electric push rod drives the cover plate to descend, the cover plate will drive the L-shaped pressing rod to squeeze the top plate, so that the stop block moves downward, making the second through groove communicate with the first through groove. When the cleaning of the flame arrester net is completed, the electric push rod drives the cover plate to rise. At this time, the L-shaped pressing rod is separated from the top plate, and the compressed spring releases its elastic force, which can push the stop block upward again to block the second through groove and the first through groove.

[0015] Furthermore, a sliding groove is opened on the outer surface of the L-shaped rod. A slider is arranged inside the sliding groove, and the slider is connected to the L-shaped pressing rod.

[0016] Through the arrangement of the sliding groove and the slider, the stability of the L-shaped pressing rod and the cover plate during lifting and lowering can be improved, and the situation of tilting can be avoided.

[0017] Furthermore, a telescopic rod is installed on the outer surface of the L-shaped rod. The end of the telescopic rod is connected to the top plate, and the spring is sleeved on the outer surface of the telescopic rod.

[0018] By setting the telescopic rod, a limiting effect can be provided for the spring, avoiding the situation of bending deformation, and improving its service performance and lifespan.

[0019] Furthermore, a rubber pad is provided on the lower surface of the cover plate.

[0020] By setting the rubber pad, the sealing performance between the cover plate and the pressing block can be improved, thus reducing the situation of air leakage and enhancing the dust adsorption effect.

[0021] Furthermore, a dust collection cloth bag is detachably connected to the end of the output end of the fan.

[0022] By setting the dust collection cloth bag, the adsorbed dust can be collected to avoid environmental pollution. Description of the Drawings

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0024] Figure 2 is a partial cross-sectional structural schematic diagram of the present utility model;

[0025] Figure 3 is Figure 2 an enlarged schematic diagram of A in

[0026] Figure 4 is a partial cross-sectional structural schematic diagram of the conical body in the present utility model;

[0027] Figure 5 is a structural schematic diagram of the installation method of the present utility model.

[0028] In the figure: 100, right-angle elbow; 101, conical body; 102, gravity ball; 103, flame arrester net; 104, pressing block; 105, L-shaped rod; 106, mounting plate; 107, electric push rod; 108, cover plate; 109, motor; 110, brush plate; 111, fan; 112, bellows; 200, housing; 201, first through groove; 202, second through groove; 203, stop block; 204, guide rod; 300, spring; 301, top plate; 400, L-shaped pressing rod; 500, chute; 501, slider; 600, telescopic rod; 700, rubber pad; 800, dust collection cloth bag. Detailed Embodiments

[0029] The following describes the present utility model in detail with reference to the accompanying drawings.

[0030] As Figures 1-5As shown in the figure, an automatic exhaust type flame arrester for a positive pressure cabinet includes a right-angle elbow 100, a conical body 101, a gravity ball 102, a flame arrestor net 103 and a pressing block 104. L-shaped rods 105 are installed on the outer surfaces of both sides of the conical body 101. An installation plate 106 is jointly installed at the upper ends of the two L-shaped rods 105. An electric push rod 107 is installed on the upper surface of the installation plate 106. The end of the telescopic end of the electric push rod 107 is connected to a cover plate 108. A motor 109 is installed inside the cover plate 108. The end of the output shaft of the motor 109 is installed with a brush plate 110. The lower surface of the brush plate 110 is provided with bristles. A blower 111 is installed on the upper surface of the installation plate 106. The suction end of the blower 111 is connected to a corrugated pipe 112. The end of the corrugated pipe 112 is connected to the cover plate 108.

[0031] When it is necessary to clean the dust on the surface of the flame arrestor net 103, the electric push rod 107 can be started. The electric push rod 107 drives the cover plate 108 to descend and cover the upper surface of the pressing block 104 for sealing. At this time, the bristles of the brush plate 110 are in contact with the flame arrestor net 103. Then the motor 109 is started. The output shaft of the motor 109 drives the brush plate 110 to rotate, so that the bristles can sweep away the dust on the surface of the flame arrestor net 103. And the suction force of the blower 111 acts inside the cover plate 108 through the corrugated pipe 112. Therefore, the swept dust can be sucked away, so as to achieve the purpose of cleaning the dust on the surface of the flame arrestor net 103, and there is no need to remove the flame arrestor net 103, ensuring the normal and stable operation of the positive pressure cabinet. It should be noted that the installation methods and working principles of components such as the right-angle elbow 100, the conical body 101 and the gravity ball 102 are the same as those in the comparative patent, so they will not be elaborated here.

[0032] Specifically, shells 200 are installed on the outer surfaces of both sides of the conical body 101. First through grooves 201 are opened on the inner walls of both sides of the conical body 101. The first through grooves 201 communicate with the shells 200. Second through grooves 202 are opened on the outer surfaces of the shells 200, and the second through grooves 202 correspond to the first through grooves 201. A stop block 203 is arranged inside the shell 200. The lower surface of the stop block 203 is connected with a guide rod 204. The end of the guide rod 204 penetrates to the outside of the shell 200. After the cover plate 108 covers the upper surface of the pressing block 104, in order to avoid the suction force of the blower 111 affecting the pressure inside the positive pressure cabinet, the guide rod 204 can be pulled to drive the stop block 203 to move downward. At this time, the second through grooves 202 communicate with the first through grooves 201. Therefore, external air can enter the conical body 101, completing the adsorption of dust by the blower 111 and avoiding the influence on the pressure inside the positive pressure cabinet.

[0033] Specifically, a spring 300 is installed on the outer surface of the L-shaped rod 105. One end of the spring 300 is connected to a top plate 301, and the end of the guide rod 204 is connected to the top plate 301. During normal use, the spring 300 can continuously apply an upward thrust to the guide rod 204, so that the stop block 203 can always be in a position where it blocks the second through groove 202 and the first through groove 201.

[0034] Specifically, L-shaped pressing rods 400 are installed on the outer surfaces of both sides of the cover plate 108. The two L-shaped pressing rods 400 respectively correspond to the two top plates 301. When the electric push rod 107 drives the cover plate 108 to descend, the cover plate 108 will drive the L-shaped pressing rods 400 to squeeze the top plates 301, so that the stop block 203 moves downward, and the second through groove 202 communicates with the first through groove 201. When the fireproof net 103 is cleaned, the electric push rod 107 drives the cover plate 108 to rise. At this time, the L-shaped pressing rods 400 are separated from the top plates 301, and the compressed spring 300 releases its elastic force, which can push the stop block 203 upward again to block the second through groove 202 and the first through groove 201.

[0035] Specifically, a sliding groove 500 is formed on the outer surface of the L-shaped rod 105. A slider 501 is arranged inside the sliding groove 500, and the slider 501 is connected to the L-shaped pressing rod 400. Through the arrangement of the sliding groove 500 and the slider 501, the stability of the L-shaped pressing rod 400 and the cover plate 108 during lifting and lowering can be improved, and the situation of tilting can be avoided.

[0036] Specifically, a telescopic rod 600 is installed on the outer surface of the L-shaped rod 105. One end of the telescopic rod 600 is connected to the top plate 301, and the spring 300 is sleeved on the outer surface of the telescopic rod 600. Through the arrangement of the telescopic rod 600, a limiting effect can be provided for the spring 300, avoiding the situation of its bending deformation, and improving its service performance and lifespan.

[0037] Specifically, a rubber pad 700 is arranged on the lower surface of the cover plate 108. Through the arrangement of the rubber pad 700, the sealing performance between the cover plate 108 and the pressing block 104 can be improved, thus reducing the situation of air leakage and improving the dust adsorption effect.

[0038] Specifically, a dust collection cloth bag 800 is detachably connected to the end of the output end of the fan 111. Through the arrangement of the dust collection cloth bag 800, the adsorbed dust can be collected to avoid polluting the environment.

[0039] The above is a detailed description of the present utility model in combination with specific embodiments. It cannot be determined that the specific implementation modes of the present utility model are only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several equivalent substitutions or obvious modifications are made, and the performance or use is the same, all of which should be regarded as belonging to the patent protection scope determined by the claims submitted for the present utility model.

Claims

1. An automatic exhaust type flame arrester for a positive pressure cabinet, comprising a right angle elbow (100), a cone (101), a gravity ball (102), a flame arrester net (103) and a pressing block (104), characterized in that: L-shaped rods (105) are installed on both sides of the outer surface of the cone (101); a mounting plate (106) is installed on the upper ends of the two L-shaped rods (105); an electric push rod (107) is installed on the upper surface of the mounting plate (106); the end of the telescopic end of the electric push rod (107) is connected to a cover plate (108); a motor (109) is installed inside the cover plate (108); a brush plate (110) is installed on the end of the output shaft of the motor (109); and bristles are provided on the lower surface of the brush plate (110); A fan (111) is installed on the upper surface of the mounting plate (106); a suction end of the fan (111) is connected to a bellows (112); and an end of the bellows (112) is connected to the cover plate (108).

2. The automatic exhaust type flame arrester for a positive pressure cabinet according to claim 1, characterized in that: A shell (200) is installed on both outer surfaces of the conical body (101), and first through grooves (201) are provided on both inner walls of the conical body (101), the first through grooves (201) are communicated with the shell (200), and a second through groove (202) is provided on the outer surface of the shell (200), and the second through groove (202) corresponds to the first through groove (201), and a stopper (203) is provided inside the shell (200), and a guide rod (204) is connected to the lower surface of the stopper (203), and the end of the guide rod (204) passes through the outer side of the shell (200).

3. The automatic exhaust type flame arrester for a positive pressure cabinet according to claim 2, characterized in that: A spring (300) is installed on the outer surface of the L-shaped rod (105), an end of the spring (300) is connected to a top plate (301), and an end of the guide rod (204) is connected to the top plate (301).

4. The automatic exhaust type flame arrester for a positive pressure cabinet according to claim 3, characterized in that: L-shaped pressure rods (400) are installed on both side outer surfaces of the cover plate (108), and the two L-shaped pressure rods (400) correspond to the two top plates (301) respectively.

5. The automatic exhaust type flame arrester for a positive pressure cabinet according to claim 4, characterized in that: The outer surface of the L-shaped rod (105) is provided with a sliding groove (500), a sliding block (501) is arranged inside the sliding groove (500), and the sliding block (501) is connected to the L-shaped pressure rod (400).

6. The automatic exhaust type flame arrester for a positive pressure cabinet according to claim 5, characterized in that: A telescopic rod (600) is installed on the outer surface of the L-shaped rod (105), an end of the telescopic rod (600) is connected to the top plate (301), and the spring (300) is sleeved on the outer surface of the telescopic rod (600).

7. The automatic exhaust type flame arrester for a positive pressure cabinet according to claim 1, characterized in that: A rubber pad (700) is provided on the lower surface of the cover plate (108).

8. The automatic exhaust type flame arrester for a positive pressure cabinet according to claim 1, characterized in that: The end of the output end of the fan (111) is detachably connected to a dust collecting bag (800).

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