CN113873848A

CN113873848A - Explosion-proof sealing device based on PLC control

Info

Publication number: CN113873848A
Application number: CN202111181455.4A
Authority: CN
Inventors: 莫廷斌; 许杰; 张琳; 黄旭东
Original assignee: Zhejiang Jieweikai Filtration Technology Co ltd
Current assignee: Zhejiang Jieweikai Filtration Technology Co ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2021-12-31

Abstract

The invention relates to the technical field of sealing, and discloses an explosion-proof sealing device based on PLC control, which comprises an explosion-proof box body, a first door plate and a second door plate, wherein a heat dissipation mechanism is arranged in the explosion-proof box body, and a door opening mechanism is arranged in the second door plate; the heat dissipation mechanism comprises a motor II, a short rotating shaft II, a gear I, a rotating column, a bent rod, a supporting plate, a sliding plate, a fan plate, a through pipe II, a gear II, a rotating rod and a connecting rod; the door opening mechanism comprises a long pressing plate, a sliding rod, a first piston pad, a first spring, a second piston pad, an ejector rod, an arc-shaped top plate, a clamping block and a second spring, the heat generated by the long-time operation of the PLC main body in the explosion-proof box body can be discharged to the outside of the explosion-proof box body through the gas flow under the combined action of the mechanisms, the internal temperature of the explosion-proof box body is enabled to be suitable all the time, the normal operation of the PLC main body is prevented from being influenced by the overhigh internal temperature of the explosion-proof box body, and the normal service life of the PLC main body is ensured.

Description

Explosion-proof sealing device based on PLC control

Technical Field

The invention relates to the technical field of sealing, in particular to an explosion-proof sealing device based on PLC control.

Background

The PLC system is a real-time system, different from a personal computer. In a traditional motor control system mainly based on a relay, the whole system almost needs to be manufactured again when the design is changed, which wastes time and labor; in order to improve the disadvantages, the U.S. DEC first published in 1969 as a Programmable Controller (Programmable Controller); the PLC is called (Programmable Logic Controller) at the beginning of its publication, and the first purpose is to replace the relay to execute the sequential control of the relay Logic and other functions such as timing or counting, so it is also called the sequence Controller, its structure is like a microcomputer, so it can be called the microcomputer Programmable Controller (MCPC), until 1976, the american society for manufacturing electrical machines formally gives the name Programmable Controller, i.e. the Programmable Controller, PC, since the Personal Computer (Personal Computer) is very popular at present and is often used with the Programmable Controller, in order to distinguish the two, it is generally called the PLC to be used separately; the variety of PLC controllers on the surface is various and varies according to different manufacturers and applicable places, but each brand can be divided into large, medium and small according to the complexity of a machine set; ordinary factories and schools usually use small-sized PLCs, wherein the Japanese series F series and the Chinese series A series are popular with Chinese people; the PLC device can also be used in some flammable and explosive places generally, so the PLC device can be arranged in an explosion-proof sealing box, but the existing explosion-proof sealing box has poor heat dissipation effect and can possibly cause the service life of the PLC device to be reduced.

Disclosure of Invention

The invention aims to provide an explosion-proof sealing device based on PLC control, which solves the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an explosion-proof sealing device based on PLC control comprises an explosion-proof box body, a first door plate and a second door plate, wherein a heat dissipation mechanism is arranged inside the explosion-proof box body, and a door opening mechanism is arranged inside the second door plate;

the heat dissipation mechanism comprises a motor II, a short rotating shaft II, a gear I, a rotating column, a bent rod, a supporting plate, a sliding plate, a fan plate, a through pipe II, a gear II, a rotating rod and a connecting rod;

the door opening mechanism comprises a long pressing plate, a sliding rod, a first piston pad, a first spring, a second piston pad, an ejector rod, an arc-shaped top plate, a clamping block and a second spring.

Preferably, the second motor is fixedly arranged at the bottom end of the inner wall of the explosion-proof box body, one end of the second short rotating shaft is fixedly arranged at the output end of the second motor, the first gear is fixedly sleeved on the outer wall of the second short rotating shaft, the rotating column is fixedly arranged at the top end of the first gear close to the edge, one end of the connecting rod is rotatably connected with the rotating column through the first bearing, the other end of the connecting rod is rotatably connected with the outer wall of the bent rod through the second bearing, the supporting plate is fixedly arranged at one end of the bent rod, the sliding plate is fixedly arranged at the bottom end of the supporting plate and is slidably connected with a plate groove arranged at the bottom end of the inner wall of the explosion-proof box body, the fan plate is fixedly arranged at the other end of the bent rod, the second through pipe is communicated with one side of the explosion-proof box body, the partition net is fixedly arranged on the inner wall of the second through the first bearing, so that one end of the connecting rod can rotate on the outer wall of the rotating column when doing circular motion, thereby guarantee the normal removal of connecting rod, through setting up the backup pad, make the area of contact of knee and explosion-proof box inner wall bottom increase to the knee is more stable when reciprocating motion about doing, through setting up the screen, prevents that external dust from getting into in the explosion-proof box, thereby influences the normal operating of PLC main part, and guarantees that external and the inside gas of explosion-proof box can circulate.

Preferably, the second gear is meshed with the first gear, the second gear is fixedly sleeved on the outer wall of the rotating rod, one end of the rotating rod is rotatably connected with the bottom end of the inner wall of the explosion-proof box body through a third bearing, and the first gear is meshed with the second gear to realize transmission between the first gear and the second gear, so that the second gear rotates to drive the sector plate on the other side of the explosion-proof box body to move, and the air circulation between the interior of the explosion-proof box body and the outside is increased.

Preferably, the long pressing plate is fixedly arranged at one end of the sliding rod, the other end of the sliding rod penetrates through the outer wall of the door plate and extends into an air cavity formed in the second door plate, one end of the spring is fixedly arranged on one side of the long pressing plate, the other end of the spring is fixedly arranged on the outer wall of the second door plate, and the first spring is arranged, so that the long pressing plate can be reset under the action of the first spring after the long pressing plate is used, and further use is facilitated next time.

Preferably, the first piston pad is fixedly installed at the other end of the sliding rod, the first piston pad is in sliding connection with an air cavity formed in the second door panel, the second piston pad is fixedly installed at one end of the ejector rod, the second piston pad is in sliding connection with the air cavity formed in the second door panel, and the first piston pad and the second piston pad are arranged to enable the air cavity formed in the first door panel to slide to generate air extrusion, so that the second piston pad can be driven to move, and the arc-shaped top plate is driven to move.

Preferably, the other end of the ejector rod penetrates through the inner wall of an air cavity formed in the second door panel and extends into a clamping groove formed in one end of the second door panel, the arc-shaped top plate is fixedly installed at the other end of the ejector rod, one end of the spring is fixedly installed on the inner wall of a block groove formed in one end of the first door panel, the fixture block is fixedly installed at the other end of the spring, the fixture block is slidably connected with the block groove formed in one end of the first door panel, the arc-shaped top plate is arranged to enable the stress of the fixture block to be more comprehensive, the jacking effect of the arc-shaped top plate is better, the fixture block can be inserted into the clamping groove formed in one end of the second door panel under the action of the spring II through the arrangement of the spring II, and therefore the first door panel and the second door panel are sealed and fixed.

Preferably, the inner wall of the explosion-proof box body is fixedly provided with a supporting plate, one side of the supporting plate is fixedly provided with a return spring, one end of the return spring is fixedly arranged on one side of a door plate II, the door plate I is hinged on one side of the explosion-proof box body, the door plate II is hinged on the other side of the explosion-proof box body, and the door plate II can be automatically opened under the action of the return spring by arranging the return spring without manually pulling the door plate by personnel.

Preferably, explosion-proof box top intercommunication is provided with siphunculus one, fixed mounting has logical rack on the siphunculus one inner wall, logical rack top fixed mounting has the partition box, the inside motor that is provided with of partition box, motor output end fixed mounting has short pivot one, fixed mounting has the fan on the short pivot outer wall, the inside PLC main part that is provided with of explosion-proof box through setting up the fan, produces downwards when making the fan rotate and bloies, directly bloies to the PLC main part, carries out the forced air cooling to the PLC main part and handles, further reduces the heat that the PLC main part produced, improves the cooling effect to explosion-proof box inside.

The invention provides an explosion-proof sealing device based on PLC control. This explosion-proof sealing device based on PLC control possesses following beneficial effect:

(1) the explosion-proof sealing device based on PLC control can enable the through pipe II to generate gas flow under the combined action of the motor II, the short rotating shaft II, the gear I, the rotating column, the bent rod, the supporting plate, the sliding plate, the fan plate, the through pipe II, the gear II, the rotating rod and the connecting rod, and increase the circulation of the inside of the explosion-proof box body and outside air, so that heat generated by the long-time operation of the PLC main body in the explosion-proof box body is discharged to the outside of the explosion-proof box body through the gas flow, the temperature in the explosion-proof box body is always proper, the PLC main body is prevented from influencing normal operation due to overhigh temperature in the explosion-proof box body, and the normal service life of the PLC main body is ensured;

(2) the explosion-proof sealing device based on PLC control can facilitate personnel to enter the explosion-proof box body under the combined action of the long pressing plate, the sliding rod, the piston pad I, the spring I, the piston pad II, the ejector rod, the arc-shaped top plate, the clamping block and the spring II, so that the PLC main body can be maintained and operated;

(3) this explosion-proof sealing device based on PLC control through compartment, motor one, short pivot one, fan, under the combined action that leads to rack, siphunculus one, can directly blow to the PLC main part, carries out the forced air cooling to the PLC main part and handles, further reduces the heat that the PLC main part produced, improves the cooling effect to explosion-proof box inside, prevents that PLC main part high temperature from leading to the internals to damage, unable normal use.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional front view of the present invention;

FIG. 3 is a schematic cross-sectional view of a front door panel according to the present invention;

FIG. 4 is a top view partially in section and schematically illustrating the structure of the present invention;

FIG. 5 is a schematic top view, partially cross-sectional structural view of a second door panel of the present invention;

FIG. 6 is a schematic top view of the gear of the present invention;

FIG. 7 is an enlarged view of the portion A of FIG. 3 according to the present invention.

In the figure: 1. the explosion-proof box body 2, the PLC main body 3, the heat dissipation mechanism 4, the door opening mechanism 5, the door plate I6, the door plate II 7, the partition net 8, the partition box 9, the motor I10, the short rotating shaft I11, the fan 12, the net rack 13, the through pipe I14, the resisting plate 15, the reset spring 301, the motor II 302, the short rotating shaft II 303, the gear I304, the rotating column 305, the bent rod 306, the supporting plate 307, the sliding plate 308, the fan plate 309, the through pipe II 310, the gear II 311, the rotating rod 312, the connecting rod 401, the long pressing plate 402, the sliding rod 403, the piston pad I404, the spring I405, the piston pad II 406, the ejector rod 407, the arc-shaped top plate 408, the fixture block 409 and the spring II.

Detailed Description

As shown in fig. 1 to 7, the present invention provides a technical solution: an explosion-proof sealing device based on PLC control comprises an explosion-proof box body 1, a first door plate 5 and a second door plate 6, wherein the top end of the explosion-proof box body 1 is communicated with a first through pipe 1, a through net frame 12 is fixedly arranged on the inner wall of the first through pipe 1, a partition box 8 is fixedly arranged at the top end of the through net frame 12, a first motor 9 is arranged inside the partition box 8, a first short rotating shaft 10 is fixedly arranged at the output end of the first motor 9, a fan 11 is fixedly arranged on the outer wall of the first short rotating shaft 10, a PLC main body 2 is arranged inside the explosion-proof box body 1, the fan 11 is arranged to blow downwards when rotating and directly blow towards the PLC main body 2, the PLC main body 2 is subjected to air cooling treatment, the heat generated by the PLC main body 2 is further reduced, the cooling effect on the inside of the explosion-proof box body 1 is improved, and under the combined action of the partition box 8, the first motor 9, the first short rotating shaft 10, the fan 11, the through net frame 12 and the first through pipe 13, the explosion-proof box body 1 can be directly blown against the PLC main body 2, the PLC main body 2 is subjected to air cooling treatment, the heat generated by the PLC main body 2 is further reduced, the cooling effect on the interior of the explosion-proof box body 1 is improved, the damage to internal parts caused by the overhigh temperature of the PLC main body 2 is prevented, the explosion-proof box body cannot be normally used, the heat dissipation mechanism 3 is arranged in the explosion-proof box body 1, and the door opening mechanism 4 is arranged in the door plate II 6;

the heat dissipation mechanism 3 comprises a second motor 301, a second short rotating shaft 302, a first gear 303, a rotating column 304, a bent rod 305, a support plate 306, a sliding plate 307, a fan plate 308, a through pipe two 309, a second gear 310, a rotating rod 311 and a connecting rod 312, wherein the second motor 301 is fixedly arranged at the bottom end of the inner wall of the explosion-proof box body 1, one end of the second short rotating shaft 302 is fixedly arranged at the output end of the second motor 301, the first gear 303 is fixedly sleeved on the outer wall of the second short rotating shaft 302, the rotating column 304 is fixedly arranged at the top end close to the edge of the first gear 303, one end of the connecting rod 312 is rotatably connected with the rotating column 304 through the first bearing, the other end of the connecting rod 312 is rotatably connected with the outer wall of the bent rod 305 through the second bearing, the support plate 306 is fixedly arranged at one end of the bent rod 305, the sliding plate 307 is fixedly arranged at the bottom end of the support plate 306, the sliding plate 307 is slidably connected with a plate groove arranged at the bottom end of the inner wall of the explosion-proof box body 1, the fan plate 308 is fixedly arranged at the other end of the bent rod 305, the through pipe two 309 is communicated with one side of the explosion-proof box body 1, the inner wall of the through pipe II 309 is fixedly provided with a separation net 7, one end of a connecting rod 312 can rotate on the outer wall of a rotary column 304 when doing circular motion by arranging a bearing I, so that the normal movement of the connecting rod 312 is ensured, the contact area between a bent rod 305 and the bottom end of the inner wall of the explosion-proof box body 1 is increased by arranging a supporting plate 306, so that the bent rod 305 is more stable when doing left-right reciprocating movement, the separation net 7 is arranged, external dust is prevented from entering the explosion-proof box body 1, so that the normal operation of the PLC main body 2 is influenced, and the gas inside the explosion-proof box body 1 is ensured to be circulated outside, a gear II 310 is meshed with a gear I303, the gear II 310 is fixedly sleeved on the outer wall of the rotary rod 311, one end of the rotary rod 311 is rotatably connected with the bottom end of the inner wall of the explosion-proof box body 1 by a bearing III, and the gear I303 is meshed with the gear II 310, so that the transmission between the gear I303 and the gear II 310 is realized, the second gear 310 rotates to drive the fan plate on the other side of the explosion-proof box body 1 to move, air circulation between the inside of the explosion-proof box body 1 and the outside is increased, gas can flow in the second through pipe 309 under the combined action of the second motor 301, the second short rotating shaft 302, the first gear 303, the rotating column 304, the bent rod 305, the supporting plate 306, the sliding plate 307, the fan plate 308, the second through pipe 309, the second gear 310, the rotating rod 311 and the connecting rod 312, and the circulation between the inside of the explosion-proof box body 1 and the outside air is increased, so that heat generated by long-time operation of the PLC main body 2 in the explosion-proof box body 1 is exhausted to the outside of the explosion-proof box body 1 through the gas flow, the temperature in the explosion-proof box body 1 is always appropriate, the normal operation of the PLC main body 2 due to overhigh temperature in the explosion-proof box body 1 is prevented, and the normal service life of the PLC main body 2 is ensured;

the door opening mechanism 4 comprises a long press plate 401, a slide rod 402, a piston pad I403, a spring I404, a piston pad II 405, a push rod 406, an arc-shaped top plate 407, a fixture block 408 and a spring II 409, wherein the long press plate 401 is fixedly arranged at one end of the slide rod 402, the other end of the slide rod 402 penetrates through the outer wall of the door panel II 6 and extends into an air cavity formed in the door panel II 6, one end of the spring I404 is fixedly arranged at one side of the long press plate 401, the other end of the spring I404 is fixedly arranged on the outer wall of the door panel II 6, the long press plate 401 can reset under the action of the spring I404 after being used, so that the next time continuous use is facilitated, the piston pad I403 is fixedly arranged at the other end of the slide rod 402, the piston pad I403 is in sliding connection with the air cavity formed in the door panel II 6, the piston pad II 405 is fixedly arranged at one end of the push rod 406, and the piston pad II 405 is in sliding connection with the air cavity formed in the door panel II 6, through the arrangement of the first piston pad 403 and the second piston pad 405, the air cavity formed in the second door panel 6 by the first piston pad 403 slides to generate air extrusion, so that the second piston pad 405 can be driven to move, the arc-shaped top plate 407 is driven to move, the other end of the ejector rod 406 penetrates through the inner wall of the air cavity formed in the second door panel 6 and extends into the clamping groove formed in one end of the second door panel 6, the arc-shaped top plate 407 is fixedly arranged at the other end of the ejector rod 406, one end of the second spring 409 is fixedly arranged on the inner wall of the block groove formed in one end of the first door panel 5, the clamping block 408 is fixedly arranged at the other end of the second spring 409, the clamping block 408 is in sliding connection with the block groove formed in one end of the first door panel 5, through the arrangement of the arc-shaped top plate 407, the stress of the arc-shaped top plate 407 on the clamping block 408 is more comprehensive, so that the jacking effect of the arc-shaped top plate 407 is better, through the arrangement of the second spring 409, the clamping block 408 can be inserted into the clamping groove 408 formed in one end of the second spring 409, thereby realizing the sealing fixation between the door plate I5 and the door plate II 6, the inner wall of the explosion-proof box body 1 is fixedly provided with the abutting plate 14, one side of the abutting plate 14 is fixedly provided with the reset spring 15, one end of the reset spring 15 is fixedly arranged at one side of the door plate II 6, the door plate I5 is hinged at one side of the explosion-proof box body 1, the door plate II 6 is hinged at the other side of the explosion-proof box body 1, the door plate II 6 can realize the automatic opening under the action of the reset spring by arranging the reset spring 15, the door plate can be conveniently accessed into the explosion-proof box body 1 by personnel under the combined action of the long press plate 401, the slide rod 402, the piston cushion I403, the spring I404, the piston cushion II 405, the ejector rod 406, the arc-shaped top plate 407, the fixture block 408 and the spring II 409, the maintenance and the operation of the PLC main body 2 can be conveniently carried out, when the personnel have things which are inconvenient, the personnel do not need to manually pull the door plate, the personnel can open the door plate by pressing the long press plate 401, the labor is saved, the structure is simple, the operation is easy, and the practicability is strong.

When the explosion-proof sealing device based on PLC control is used, a second motor 301 is started, the second motor 301 drives a second short rotating shaft 302 to rotate, the second short rotating shaft 302 drives a first gear 303 to rotate, the first gear 303 drives a rotating column 304 to do circular motion, the rotating column 304 drives one end of a connecting rod 312 to do circular motion, the other end of the connecting rod 302 drives a bent rod 305 to do reciprocating motion left and right, the bent rod 305 drives a fan plate 308 to do reciprocating motion left and right, the first gear 303 also drives a second gear 310 to rotate, the second gear 310 drives the fan plate on the other side of an explosion-proof box body 1 to do reciprocating motion left and right, when the fan plate 308 does reciprocating motion left and right, gas flow is generated in a through pipe two 309, the circulation between the inside of the explosion-proof box body 1 and outside air is increased, therefore, heat generated by long-time operation of a PLC main body 2 in the explosion-proof box body 1 is discharged to the outside of the explosion-proof box body 1 through the gas flow, and further, the temperature in the explosion-proof box body 1 is always appropriate, the normal operation of the PLC main body 2 is prevented from being influenced by the overhigh internal temperature of the explosion-proof box body 1, and the normal service life of the PLC main body 2 is ensured; pressing the long pressing plate 401, the long pressing plate 401 drives the sliding rod 402 to move, the sliding rod 402 drives the piston pad 403 to slide in an air cavity formed in the door panel II 6, when the piston pad 403 slides, air in the air cavity formed in the door panel II 6 is extruded to the piston pad II 405, the piston pad II 405 slides in the air cavity formed in the door panel II 6, the piston pad II 405 drives the ejector rod 406 to move, the ejector rod 406 drives the arc-shaped top plate 407 to move, the arc-shaped top plate 407 pushes the fixture block 408 out of a clamping groove formed in one end of the door panel II 6 when moving, so that the door panel I5 and the door panel II 6 are not sealed and fixed any more, at the moment, the reset springs 15 on the two sides of the explosion-proof box body 1 elastically push the door panel I5 and the door panel II 6, so that the door panel I5 and the door panel II 6 are opened, further, a person can conveniently enter the explosion-proof box body 1 to maintain and operate the PLC main body 2, when something in the hand of the person is inconvenient, the door plate can be opened only by pressing the long pressing plate 401, so that the labor is saved, the structure is simple, the operation is easy, and the practicability is high; starting motor 9, motor 9 drive a short pivot 10 and rotate, and a short pivot 10 drives fan 11 and rotates, and fan 11 produces downwards when rotating and bloies, directly blows to PLC main part 2, carries out the forced air cooling to PLC main part 2 and handles, further reduces the heat that PLC main part 2 produced, improves the cooling effect to 1 inside of explosion-proof box, prevents that 2 high temperatures of PLC main part from leading to the internals to damage, unable normal use.

Claims

1. The utility model provides an explosion-proof sealing device based on PLC control, includes explosion-proof box (1), door plant one (5), door plant two (6), its characterized in that: a heat dissipation mechanism (3) is arranged inside the explosion-proof box body (1), and a door opening mechanism (4) is arranged inside the second door panel (6);

the heat dissipation mechanism (3) comprises a second motor (301), a second short rotating shaft (302), a first gear (303), a rotating column (304), a bent rod (305), a supporting plate (306), a sliding plate (307), a fan plate (308), a second through pipe (309), a second gear (310), a rotating rod (311) and a connecting rod (312);

the door opening mechanism (4) comprises a long pressing plate (401), a sliding rod (402), a piston pad I (403), a spring I (404), a piston pad II (405), a push rod (406), an arc-shaped top plate (407), a clamping block (408) and a spring II (409).

2. The explosion-proof sealing device based on PLC control of claim 1, characterized in that: the motor II (301) is fixedly installed at the bottom end of the inner wall of the explosion-proof box body (1), one end of the short rotating shaft II (302) is fixedly installed at the output end of the motor II (301), the gear I (303) is fixedly sleeved on the outer wall of the short rotating shaft II (302), the rotary column (304) is fixedly installed at the top end of the gear I (303) close to the edge, one end of the connecting rod (312) is rotatably connected with the rotary column (304) through the bearing I, the other end of the connecting rod (312) is rotatably connected with the outer wall of the bent rod (305) through the bearing II, the supporting plate (306) is fixedly installed at one end of the bent rod (305), the sliding plate (307) is fixedly installed at the bottom end of the supporting plate (306), the sliding plate groove sliding connection is formed between the sliding plate (307) and the bottom end of the inner wall of the explosion-proof box body (1), the fan plate (308) is fixedly installed at the other end of the bent rod (305), the through pipe II (309) is communicated with one side of the explosion-proof box body (1), and a separation net (7) is fixedly arranged on the inner wall of the through pipe II (309).

3. The explosion-proof sealing device based on PLC control of claim 1, characterized in that: the second gear (310) is meshed with the first gear (303), the second gear (310) is fixedly sleeved on the outer wall of the rotating rod (311), and one end of the rotating rod (311) is rotatably connected with the bottom end of the inner wall of the explosion-proof box body (1) through a third bearing.

4. The explosion-proof sealing device based on PLC control of claim 2, characterized in that: the long pressing plate (401) is fixedly installed at one end of the sliding rod (402), the other end of the sliding rod (402) penetrates through the outer wall of the second door panel (6) and extends into an air cavity formed in the second door panel (6), one end of the first spring (404) is fixedly installed on one side of the long pressing plate (401), and the other end of the first spring (404) is fixedly installed on the outer wall of the second door panel (6).

5. The explosion-proof sealing device based on PLC control of claim 1, characterized in that: the first piston pad (403) is fixedly arranged at the other end of the sliding rod (402), the first piston pad (403) is in sliding connection with an air cavity formed in the second door panel (6), the second piston pad (405) is fixedly arranged at one end of the ejector rod (406), and the second piston pad (405) is in sliding connection with the air cavity formed in the second door panel (6).

6. The explosion-proof sealing device based on PLC control of claim 1, characterized in that: the other end of the ejector rod (406) penetrates through the inner wall of an air cavity formed in the second door panel (6) and extends into a clamping groove formed in one end of the second door panel (6), the arc-shaped top plate (407) is fixedly installed at the other end of the ejector rod (406), one end of the second spring (409) is fixedly installed on the inner wall of a block groove formed in one end of the first door panel (5), the clamping block (408) is fixedly installed at the other end of the second spring (409), and the clamping block (408) is in sliding connection with the block groove formed in one end of the first door panel (5).

7. The explosion-proof sealing device based on PLC control of claim 1, characterized in that: the explosion-proof box is characterized in that a supporting plate (14) is fixedly mounted on the inner wall of the explosion-proof box body (1), a reset spring (15) is fixedly mounted on one side of the supporting plate (14), one end of the reset spring (15) is fixedly mounted on one side of a second door plate (6), the first door plate (5) is hinged to one side of the explosion-proof box body (1), and the second door plate (6) is hinged to the other side of the explosion-proof box body (1).

8. The explosion-proof sealing device based on PLC control of claim 1, characterized in that: explosion-proof box (1) top intercommunication is provided with siphunculus (1), fixed mounting has logical rack (12) on siphunculus (1) inner wall, logical rack (12) top fixed mounting has compartment (8), inside motor (9) that is provided with of compartment (8), motor (9) output end fixed mounting has short pivot (10), fixed mounting has fan (11) on short pivot (10) outer wall, explosion-proof box (1) inside is provided with PLC main part (2).