CN115568127A

CN115568127A - Positive pressure type explosion-proof control cabinet

Info

Publication number: CN115568127A
Application number: CN202210930968.9A
Authority: CN
Inventors: 陆超; 陆天禹
Original assignee: Qidong Explosion Proof Electric Appliance Co ltd
Current assignee: Qidong Explosion Proof Electric Appliance Co ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2023-01-03

Abstract

The invention discloses a positive pressure type explosion-proof control cabinet, which relates to the field of control cabinets and comprises a cabinet body, wherein a partition plate is fixedly arranged inside the cabinet body, the cabinet body is divided into a fire extinguishing chamber and an installation chamber through the partition plate, an air bag filled with carbon dioxide is filled inside the fire extinguishing chamber, an extrusion mechanism is arranged inside the fire extinguishing chamber, a plurality of through holes which are uniformly distributed are formed in the upper end of the partition plate, a shell is fixedly arranged on the left inner side wall of the installation chamber, a trigger mechanism is arranged inside the shell, the upper end of a rotating rod in the trigger mechanism penetrates through the partition plate through a first bearing and extends into the fire extinguishing chamber, the upper end of the rotating rod is in transmission connection with a bidirectional threaded rod in the extrusion mechanism through a gear pair, and a cutting-off mechanism is further arranged on the left inner side wall of the cabinet body. The fire extinguisher can automatically extinguish fire when a circuit and an electrical element in the cabinet body are on fire, and can cut off the circuit when the fire is large and cannot be extinguished, so that the fire is prevented from spreading, the property loss is reduced, and the fire extinguisher is convenient for people to use.

Description

Positive pressure type explosion-proof control cabinet

Technical Field

The invention belongs to the technical field of control cabinets, and particularly relates to a positive pressure type explosion-proof control cabinet.

Background

The control cabinet is formed by assembling switch equipment, measuring instruments, protective electrical equipment and auxiliary equipment in a closed or semi-closed metal cabinet or on a screen according to the requirements of electrical wiring, the arrangement of the control cabinet meets the requirements of normal operation of an electric power system, the control cabinet is convenient to overhaul, the safety of people and surrounding equipment is not endangered, a circuit can be switched on or switched off by a manual or automatic switch in normal operation, the circuit is switched off or an alarm is given by the protective electrical equipment in fault or abnormal operation, various parameters in operation can be displayed by the measuring instruments, certain electrical parameters can be adjusted, and the control cabinet can prompt or send signals deviating from the normal working state and is commonly used in various power generation, distribution and transformation substations.

At present, the positive pressure type switch board is when using, because the internal work electrical components is more, internal circuit and electrical components all can produce the heat at the during operation, thereby lead to the switch board in the temperature higher, especially when hot day gas, the inside high temperature of switch board leads to controlling internal circuit and electrical components burning damage easily, and lack the mechanism of in time putting out a fire in the switch board, thereby it is serious to lead to the switch board to burn out, stretch along the circuit even, seriously influence the power supply, cause great loss of property, consequently, provide a positive pressure type explosion-proof switch board.

Disclosure of Invention

Aiming at the situation and overcoming the defects of the prior art, the invention provides a positive pressure type explosion-proof control cabinet, which effectively solves the problems that the temperature in the control cabinet is higher, especially in hot weather, the internal temperature of the control cabinet is too high, so that the internal control circuit and the electric appliance are easy to burn and damage due to the fact that the internal working electric appliance elements are more, and a mechanism for timely extinguishing fire is lacked in the control cabinet, so that the control cabinet is seriously burned, the power supply is seriously influenced, and the great property loss is caused when the conventional positive pressure type control cabinet is used.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a positive pressure type explosion-proof control cabinet, includes the cabinet body, the fixed baffle that is provided with in inside of the cabinet body, the cabinet body divide into chamber and the installation cavity of putting out a fire through the baffle, the inside packing in chamber of putting out a fire has the gasbag that is full of carbon dioxide, and the inside in chamber of just putting out a fire is provided with extrusion mechanism, a plurality of evenly distributed's through-hole is seted up to the upper end of baffle, the fixed casing that is provided with of left inside wall of installation cavity, the inside of casing is provided with trigger mechanism, the bull stick upper end among the trigger mechanism passes the baffle through first bearing and extends to in the chamber of putting out a fire, and the upper end of bull stick is connected through the two-way threaded rod transmission among gear pair and the extrusion mechanism, still be provided with shutdown mechanism on the left inside wall of the cabinet body, the cutting knife among the shutdown mechanism is located the inlet top of the cabinet body, the front side opening department in chamber of putting out a fire is provided with the closing plate, the upside of closing plate is connected through the upper side wall front end rotation of first hinge and the cabinet body, the front side opening department of closing plate is provided with the cabinet door, the right side of cabinet door is connected through second hinge rotation baffle, the front side opening department of hinge connection of right side of cabinet door, there is through the hinge connection.

Preferably, the trigger mechanism comprises a push plate, a push rod, a thread cutter, a first rope, a worm, a torsion spring, a worm wheel and a rotating rod, the lower end of the rotating rod penetrates through the upper side wall of the casing through a second bearing and is rotatably connected with the casing, the lower end of the rotating rod is fixedly connected with the worm wheel, the worm wheel is transversely arranged in the casing, the left end and the right end of the worm are rotatably connected with the left side wall of the cabinet and the right side wall of the casing through third bearings respectively, the worm is meshed with the worm wheel and is connected with the worm, the worm is fixedly sleeved with a winding wheel, the torsion spring is sleeved on the worm and is positioned on the right side of the winding wheel, the two ends of the torsion spring are rotatably connected with the right side wall of the casing through winding wheels respectively, the upper end of the first rope is fixedly connected with the winding wheel, the push rod is transversely arranged inside the casing, a round opening for sliding of the push plate is formed in the left side of the casing, the push plate is slidably arranged in the round opening and is fixedly connected with the right end of the push rod, a strip-shaped opening for sliding insertion of the push rod is formed in the upper side of the push rod wall, a strip-shaped socket is arranged on one side of the push rod wall, and the lower end of the first rope penetrates through the strip-shaped socket, and is detachably connected with the strip-shaped socket, and is connected with the strip-shaped socket of the strip-shaped cutter, and is detachably connected with the strip-shaped socket.

Preferably, the extrusion mechanism includes two stripper plates and two-way threaded rod, two the equal vertical setting of stripper plate is in the inside and the slidable setting in the chamber of putting out a fire, two-way threaded rod transversely sets up in the inside in chamber of putting out a fire, and the pole wall both ends of two-way threaded rod respectively with two stripper plate threaded connection, the both ends of two-way threaded rod all rotate with the left and right sides in chamber of putting out a fire respectively through the fourth bearing and are connected.

Preferably, a plurality of evenly distributed pointed cones are fixedly connected to two opposite sides of the two extrusion plates.

Preferably, the middle part of the upper side of the partition board is provided with a guide groove which is transversely arranged, two guide wheels are arranged in the guide groove in a rolling manner, and the upper ends of the supports of the two guide wheels are respectively fixedly connected with the middle parts of the lower sides of the two extrusion plates.

Preferably, the right end of the worm extends to the outside of the shell and is fixedly connected with a hand wheel.

Preferably, the lower inside wall of casing is fixed and is provided with first ring, the lower extreme fixedly connected with first couple of first rope, first couple articulates each other with first ring.

Preferably, the gear pair comprises a first bevel gear and a second bevel gear, the first bevel gear is fixedly connected with the upper end of the rotating rod, the second bevel gear is fixedly sleeved with the left end of the rod wall of the bidirectional threaded rod, and the first bevel gear is in meshed connection with the second bevel gear.

Preferably, shutdown mechanism includes cutting off cutter, montant, diaphragm, first spring, fixed plate and second rope, the vertical setting of cutting off cutter is in service entrance right side top, and the upper end and the montant fixed connection of cutting off cutter, the upper end and the second rope fixed connection of montant, the round hole has been seted up to the lower lateral wall of casing, the fixed plate is located the inside of casing and is located the upside of push rod, and the left inside wall fixed connection of fixed plate and the cabinet body, the upper end of second rope passes round hole and bar mouth in proper order and can dismantle with the fixed plate and be connected, the second rope is located the left side of first rope, the diaphragm is located the top of cutting off cutter and with the left inside wall fixed connection of the cabinet body, and the diaphragm passes through guiding hole and montant sliding connection, first spring housing is established on the montant, and the upper and lower both ends of first spring respectively with cutting off cutter and diaphragm fixed connection.

Preferably, the downside fixedly connected with second ring of fixed plate, the upper end fixed connection second couple of second rope, the second couple articulates with the second ring, the pole wall of push rod is fixed to be cup jointed the plectane, the fixed second spring that is provided with between the left side wall of plectane and the cabinet body, the second spring is established with the push rod movable sleeve, the inside of socket is provided with the one-way breather valve.

The invention has the technical effects and advantages that:

1. when the cable breaker is used, when a fire phenomenon occurs on a circuit or an electrical element inside a cabinet body and the internal temperature of an installation cavity is too high, the gas inside the installation cavity expands sharply, so that the push plate is pushed to move towards the inside of the shell, the push plate drives the push rod and the cable cutter to move towards the left side, the cable cutter cuts a first cable firstly, the reel loses pulling force at the moment, a torsion spring is arranged to apply torsional force to the cable reel, the reel drives the worm to rotate, the worm rotates to drive the worm gear to rotate, the worm gear drives the rotating rod to rotate, the rotating rod drives the bidirectional threaded rod to rotate through the gear pair, the bidirectional threaded rod rotates to drive the two extrusion plates to move relatively, so that an air bag in the fire extinguishing cavity can be broken, after the air bag is broken, carbon dioxide overflows and enters the installation cavity through a through hole in the partition plate, the carbon dioxide concentration in the installation cavity is improved, fire extinguishment of the circuit and the electrical element is achieved, when fire extinguishment is completed, the temperature inside the cabinet body stops rising, the push rod and the cable cutter stops driving the push rod and the cable cutter to move towards the left side, so that the cable cutter can rapidly cuts a cable cutter, the cable cutter can prevent the cable cutter from being damaged by the cable cutter, and the cable cutter can be used for preventing the cable from being used for people from being damaged.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

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

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

FIG. 3 is a schematic view of the internal structure of the housing of the present invention;

FIG. 4 is a schematic top view of the push rod of the present invention;

FIG. 5 is a schematic view showing a connection structure of two squeeze plates and a partition plate according to the present invention;

FIG. 6 is a schematic perspective view of the extrusion plate of the present invention;

FIG. 7 is a schematic perspective view of the separator of the present invention;

FIG. 8 is an enlarged view of portion A of FIG. 2 according to the present invention;

FIG. 9 is an enlarged view of portion B of FIG. 2 according to the present invention;

fig. 10 is a top view of the worm gear and worm of the present invention.

In the figure: 1. a cabinet body; 2. a partition plate; 3. an air bag; 4. a housing; 5. a rotating rod; 6. a bidirectional threaded rod; 7. a cutting knife; 8. a sealing plate; 9. a cabinet door; 10. pushing the plate; 11. a push rod; 12. a thread cutter; 13. a first rope; 14. a worm; 15. a torsion spring; 16. a worm gear; 17. a reel; 18. a pressing plate; 19. a pointed cone; 20. a guide wheel; 21. a hand wheel; 22. a first circular ring; 23. a first hook; 24. a first bevel gear; 25. a second bevel gear; 26. a vertical rod; 27. a transverse plate; 28. a first spring; 29. a fixing plate; 30. a second rope; 31. a second circular ring; 32. a second hook; 33. a circular plate; 34. a second spring; 35. a one-way vent valve; 36. and a baffle plate.

Detailed Description

The invention provides a positive pressure type explosion-proof control cabinet as shown in figures 1-10, which comprises a cabinet body 1, wherein a partition plate 2 is fixedly arranged inside the cabinet body 1, the cabinet body 1 is divided into a fire extinguishing chamber and an installation chamber through the partition plate 2, an air bag 3 filled with carbon dioxide is filled inside the fire extinguishing chamber, an extrusion mechanism is arranged inside the fire extinguishing chamber, a plurality of uniformly distributed through holes are formed in the upper end of the partition plate 2, a shell 4 is fixedly arranged on the left inner side wall of the installation chamber, a trigger mechanism is arranged inside the shell 4, the upper end of a rotating rod 5 in the trigger mechanism penetrates through the partition plate 2 through a first bearing and extends into the fire extinguishing chamber, the upper end of the rotating rod 5 is in transmission connection with a bidirectional threaded rod 6 in the extrusion mechanism through a gear pair, a cutting mechanism is further arranged on the left inner side wall of the cabinet body 1, a cutting knife 7 in the cutting mechanism is positioned above a wire inlet of the cabinet body 1, a sealing plate 8 is arranged at the front opening of the fire extinguishing chamber, the upper side of the sealing plate 8 is in rotation connection with the front end of the upper side wall of the cabinet body 1 through a first hinge, a right side opening of the cabinet body is connected with a baffle plate 36 at the front end of the front wall of the cabinet body through a second hinge.

As shown in fig. 2-4, the triggering mechanism includes a push plate 10, a push rod 11, a thread cutter 12, a first rope 13, a worm 14, a torsion spring 15, a worm wheel 16 and a rotating rod 5, the lower end of the rotating rod 5 passes through the upper side wall of the housing 4 through a second bearing and is rotatably connected with the housing 4, the lower end of the rotating rod 5 is fixedly connected with the worm wheel 16, the worm wheel 16 is transversely arranged in the housing 4, the left end and the right end of the worm 14 are respectively rotatably connected with the left side wall of the cabinet 1 and the right side wall of the housing 4 through a third bearing, the worm 14 is engaged with the worm wheel 16, a reel 17 is fixedly sleeved on the worm 14, the torsion spring 15 is sleeved on the worm 14 and is positioned at the right side of the reel 17, and torsion spring 15's both ends rotate with the right side wall of reel 17 with casing 4 respectively and are connected, the upper end and the reel 17 fixed connection of first rope 13, push rod 11 transversely sets up the inside of casing 4, can supply the gliding round mouth of push pedal 10 has been seted up in the left side of casing 4, push pedal 10 slides and sets up in the round mouth and with the right-hand member fixed connection of push rod 11, can supply push rod 11 slip male socket to seted up by the left side wall of the cabinet body 1, the bar mouth has been seted up to one side that push pedal 10 is close to push rod 11 pole wall upside, the lower extreme of first rope 13 passes the bar mouth and can dismantle with the lower side wall of casing 4 and be connected, secant sword 12 is fixed to be set up in the bar mouth and is located the right side of first rope 13.

As shown in fig. 2, the extrusion mechanism includes two stripper plates 18 and two-way threaded rod 6, and two stripper plates 18 all vertical settings are in the inside and the slidable setting in the chamber of putting out a fire, and two-way threaded rod 6 transversely sets up in the inside in the chamber of putting out a fire, and two-way threaded rod 6's pole wall both ends respectively with two stripper plates 18 threaded connection, the both ends of two-way threaded rod 6 all through the fourth bearing respectively with put out a fire the left and right sides in chamber and rotate and be connected.

As shown in fig. 2, 5 and 6, a plurality of evenly distributed pointed cones 19 are fixedly connected to opposite sides of the two pressing plates 18, so that the airbag 3 can be punctured more easily when the two pressing plates 18 move relatively.

As shown in fig. 5 and 7, a guide groove is transversely formed in the middle of the upper side of the partition board 2, two guide wheels 20 are arranged inside the guide groove in a rolling manner, the upper ends of the brackets of the two guide wheels 20 are fixedly connected with the middle of the lower side of the two extrusion plates 18 respectively, the two extrusion plates 18 can be more stably moved through the two guide wheels 20 and the guide groove, and the friction force between the two extrusion plates 18 and the partition board 2 is reduced.

As shown in fig. 2 and 3, the right end of the worm 14 extends to the outside of the housing 4 and is fixedly connected with a hand wheel 21, so that a person can rotate the hand wheel 21 to drive the worm 14 to rotate in the opposite direction, and thus the two squeezing plates 18 move in the opposite direction and store energy for the torsion spring 15.

As shown in fig. 3, a first ring 22 is fixedly arranged on the lower inner side wall of the housing 4, a first hook 23 is fixedly connected to the lower end of the first rope 13, and the first hook 23 is hooked with the first ring 22, so that the lower end of the first rope 13 is pulled conveniently and is convenient for subsequent connection and use.

As shown in fig. 8, the gear pair includes a first bevel gear 24 and a second bevel gear 25, the first bevel gear 24 is fixedly connected with the upper end of the rotating rod 5, the second bevel gear 25 is fixedly sleeved with the left end of the rod wall of the bidirectional threaded rod 6, and the first bevel gear 24 is meshed with the second bevel gear 25, so that the rotating rod 5 can drive the bidirectional threaded rod 6 to rotate when rotating.

As shown in fig. 2, fig. 3 and fig. 9, the cutting mechanism includes a cutting knife 7, a vertical rod 26, a horizontal plate 27, a first spring 28, a fixing plate 29 and a second rope 30, the cutting knife 7 is vertically disposed above the right side of the wire inlet, and the upper end of the cutting knife 7 is fixedly connected to the vertical rod 26, the upper end of the vertical rod 26 is fixedly connected to the second rope 30, a circular hole is formed in the lower side wall of the casing 4, the fixing plate 29 is located inside the casing 4 and above the push rod 11, and the fixing plate 29 is fixedly connected to the left inner side wall of the cabinet 1, the upper end of the second rope 30 sequentially passes through the circular hole and the strip-shaped opening and is detachably connected to the fixing plate 29, the second rope 30 is located on the left side of the first rope 13, the horizontal plate 27 is located above the cutting knife 7 and fixedly connected to the left inner side wall of the cabinet 1, and the horizontal plate 27 is slidably connected to the vertical rod 26 through a guide hole, the first spring 28 is sleeved on the vertical rod 26, and the upper and lower ends of the first spring 28 are respectively fixedly connected to the cutting knife 7 and the horizontal plate 27.

As shown in fig. 3, a second ring 31 is fixedly connected to the lower side of the fixing plate 29, a second hook 32 is fixedly connected to the upper end of the second rope 30, the second hook 32 is hooked to the second ring 31, the upper end of the second rope 30 can be pulled and is convenient to connect and mount, a circular plate 33 is fixedly sleeved on the rod wall of the push rod 11, a second spring 34 is fixedly arranged between the circular plate 33 and the left side wall of the cabinet 1, the second spring 34 is movably sleeved on the push rod 11, the circular plate 33 can be elastically supported by the second spring 34, the push rod 11 is prevented from freely moving to the left side to cause the thread cutter 12 to cut off the first rope 13 and the second rope 30, and a one-way vent valve 35 is arranged inside the socket to prevent external air from entering the mounting cavity.

The working principle of the invention is as follows: when the fire extinguishing cabinet is used, when the temperature inside the installation cavity is too high due to the fire phenomenon of a circuit or an electrical element inside the cabinet body 1, the gas inside the installation cavity is expanded sharply, so that the push plate 10 is pushed to move towards the inside of the shell 4, the push plate 10 drives the push rod 11 and the line cutting knife 12 to move towards the left side, the line cutting knife 12 cuts off the first rope 13 at first, the reel 17 loses the pulling force, the winding wheel 17 is exerted with the torsion force through the arranged torsion spring 15, the winding wheel 17 drives the worm 14 to rotate, the worm 14 rotates to drive the worm wheel 16 to rotate, the worm wheel 16 drives the rotary rod 5 to rotate, the rotary rod 5 drives the two-way threaded rod 6 to rotate through the gear pair, the two-way threaded rod 6 rotates to drive the two extrusion plates 18 to move relatively, so that the air bag 3 in the fire extinguishing cavity can be crushed, and after the air bag 3 is crushed, wherein carbon dioxide overflows and gets into the installation cavity through the through-hole on the baffle 2, thereby improve the carbon dioxide concentration in the installation cavity, the realization is put out a fire to circuit and electrical components, and when putting out a fire and accomplish, the internal portion temperature of cabinet 1 stops to rise, push pedal 10 stops to drive push rod 11 and secant sword 12 and remove to the left side, if unable completion is put out a fire, the inside temperature of installation cavity continues to rise, push pedal 10 continues to drive push rod 11 and secant sword 12 and removes to the left side, secant sword 12 cuts off second rope 30, the pulling force is gone out to montant 26 mistake, exert elasticity through first spring 28 to secant sword 7, make the quick downstream of secant sword 7, cutting off sword 7 can cut off the circuit of inlet wire department, avoid the intensity of a fire to stretch, reduce loss of property, and is convenient for people to use.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a positive pressure type explosion-proof control cabinet, includes the cabinet body (1), its characterized in that: the fixed baffle (2) that is provided with in inside of the cabinet body (1), the cabinet body (1) divide into chamber and the installation cavity of putting out a fire through baffle (2), the inside packing in chamber of putting out a fire has gasbag (3) that are full of carbon dioxide, and the inside in chamber of just putting out a fire is provided with extrusion mechanism, a plurality of evenly distributed's through-hole has been seted up to the upper end of baffle (2), the fixed casing (4) that is provided with in left side inside wall of installation cavity, the inside of casing (4) is provided with trigger mechanism, bull stick (5) upper end in the trigger mechanism passes baffle (2) through first bearing and extends to the chamber of putting out a fire, and the upper end of bull stick (5) is connected through gear pair and two-way threaded rod (6) transmission in the extrusion mechanism, still be provided with shutdown mechanism on the left side inside wall of the cabinet body (1), shutdown knife (7) in the shutdown mechanism are located the inlet top of the cabinet body (1), the front side opening department in chamber of putting out a fire is provided with closing plate (8), the upside of closing plate (8) is connected through the upside of first hinge and cabinet body (1) upside front end rotation, the cabinet door front side opening department is provided with second side opening (9), the right side opening baffle (9) is connected with the casing (9), and the baffle (9) front side opening of cabinet door (9) front side opening connection of hinge (9) is connected with the hinge.

2. The positive pressure type explosion-proof control cabinet according to claim 1, wherein: trigger mechanism includes push pedal (10), push rod (11), secant sword (12), first rope (13), worm (14), torque spring (15), worm wheel (16) and bull stick (5), the lower extreme of bull stick (5) passes the last lateral wall of casing (4) through the second bearing and rotates with casing (4) and be connected, and the lower extreme and worm wheel (16) fixed connection of bull stick (5), worm wheel (16) transversely set up in casing (4), and both ends all rotate with the left side wall of the cabinet body (1) and the right side wall of casing (4) through the third bearing respectively about worm (14) and be connected, worm (14) are connected with worm wheel (16) meshing, the fixed cover of worm (14) has connect reel (17), torque spring (15) go up and be located the right side of reel (17), and the both ends of torque spring (15) respectively with reel (17) and the right side wall rotation of casing (4) be connected, the upper end and the fixed cover of first rope (13) are connected the fixed cover of reel (17) and are seted up the right-hand member (11) of reel (4) and slide in push pedal (11) and the casing (11) and slide the right-hand member (10) and set up and supply the casing (11), the socket that can supply push rod (11) slip male is seted up to the left side wall of the cabinet body (1), the bar mouth has been seted up to one side that push rod (11) pole wall upside is close to push pedal (10), the lower extreme of first rope (13) passes the bar mouth and can dismantle with the lower lateral wall of casing (4) and be connected, fixed the setting in the bar mouth of secant sword (12) is located the right side of first rope (13).

3. The positive pressure type explosion-proof control cabinet according to claim 2, wherein: extrusion mechanism includes two stripper plates (18) and two-way threaded rod (6), two but the equal vertical setting of stripper plate (18) is in the inside in chamber of putting out a fire and the setting of sliding, two-way threaded rod (6) transversely set up in the inside in chamber of putting out a fire, and the pole wall both ends of two-way threaded rod (6) respectively with two stripper plates (18) threaded connection, the both ends of two-way threaded rod (6) all rotate with the left and right sides in chamber of putting out a fire respectively through the fourth bearing and are connected.

4. A positive pressure type explosion-proof control cabinet according to claim 3, wherein: the two opposite sides of the two extrusion plates (18) are fixedly connected with a plurality of evenly distributed pointed cones (19).

5. The positive pressure type explosion-proof control cabinet according to claim 4, wherein: the middle part of the upper side of the partition board (2) is provided with a guide groove which is transversely arranged, two guide wheels (20) are arranged in the guide groove in a rolling mode, and the upper ends of the supports of the two guide wheels (20) are fixedly connected with the middle parts of the lower sides of the two extrusion plates (18) respectively.

6. The positive pressure type explosion-proof control cabinet according to claim 5, wherein: the right end of the worm (14) extends to the outside of the shell (4) and is fixedly connected with a hand wheel (21).

7. The positive pressure type explosion-proof control cabinet according to claim 6, wherein: the lower inner side wall of the shell (4) is fixedly provided with a first circular ring (22), the lower end of the first rope (13) is fixedly connected with a first hook (23), and the first hook (23) is hooked with the first circular ring (22).

8. The positive pressure type explosion-proof control cabinet according to claim 7, wherein: the gear pair comprises a first bevel gear (24) and a second bevel gear (25), the first bevel gear (24) is fixedly connected with the upper end of the rotating rod (5), the second bevel gear (25) is fixedly sleeved with the left end of the rod wall of the bidirectional threaded rod (6), and the first bevel gear (24) is meshed with the second bevel gear (25).

9. The positive pressure type explosion-proof control cabinet according to claim 8, wherein: cutting off mechanism includes cutting off cutter (7), montant (26), diaphragm (27), first spring (28), fixed plate (29) and second rope (30), cutting off cutter (7) are vertical to be set up in service entrance right side top, and the upper end and montant (26) fixed connection of cutting off cutter (7), the upper end and second rope (30) fixed connection of montant (26), the round hole has been seted up to the lower lateral wall of casing (4), fixed plate (29) are located the inside of casing (4) and are located the upside of push rod (11), and fixed plate (29) and the left inside wall fixed connection of the cabinet body (1), the upper end of second rope (30) passes round hole and bar mouth in proper order and can dismantle with fixed plate (29) and be connected, second rope (30) are located the left side of first rope (13), diaphragm (27) are located the top of cutting off cutter (7) and the left side fixed connection with the inside wall (1), and diaphragm (27) pass through guiding hole and montant (26) sliding connection, first spring (28) upper and lower both ends (28) fixed connection are established respectively on first cutter (7).

10. The positive pressure type explosion-proof control cabinet according to claim 9, wherein: the downside fixedly connected with second ring (31) of fixed plate (29), upper end fixed connection second couple (32) of second rope (30), second couple (32) articulate with second ring (31), the pole wall of push rod (11) is fixed to be cup jointed plectane (33), fixed second spring (34) that is provided with between the left side wall of plectane (33) and the cabinet body (1), second spring (34) are established with push rod (11) movable sleeve, the inside of socket is provided with one-way ventilation valve (35).