CN116387063A - Switching device for explosion-proof electrical equipment - Google Patents

Abstract

The invention relates to the technical field of explosion-proof electrical equipment, and discloses a switching device for explosion-proof electrical equipment, which comprises a sealed protective box body, wherein a body is arranged in the protective box body, a first switching component and a second switching component are respectively arranged at the right end and the upper end of the body, an operation component and a pressure relief component are respectively arranged at the right side and the upper side of the protective box body, and the first switching component is matched with the operation component for use, and the second switching component is matched with the pressure relief component for use; the switch assembly is a touch plate A arranged on the right side of the body and a touch plate B in contact fit with the touch plate A, and the inner bottom end of the protective box body is fixedly connected with a bracket. According to the invention, the first touch plate b is contacted with the first touch plate a by adjusting the distance between the second magnet and the first magnet which are in magnetic repulsion fit, and the body is arranged in the protective box body, so that explosion accidents caused by electric sparks caused by misoperation can be avoided, and in addition, the position of the first magnet relative to the first magnet is maintained through the moving part, so that the operation is simple and convenient.

Description

Switching device for explosion-proof electrical equipment

Technical Field

The invention relates to the technical field of explosion-proof electrical equipment, in particular to a switching device for explosion-proof electrical equipment.

Background

The explosion-proof electrical equipment is applied to dangerous places or flammable and explosive places such as coal mine holes due to the structural specificity of the explosion-proof electrical equipment, coal mine dust is inevitably scattered in the mine holes in the coal mining process, but when a switch of the explosion-proof electrical equipment is operated improperly, electric sparks can be generated to detonate flammable and explosive air in the mine holes, in addition, safety pressure relief space is not available when explosion occurs in the switch, when a switch shell leaks due to high-voltage damage, the flammable and explosive air in the mine holes can be detonated similarly, the danger coefficient is high, and the use safety is low.

To this end, we propose a switching device for explosion-proof electrical equipment to solve the above-mentioned problems.

Disclosure of Invention

The present invention is intended to provide a switching device for explosion-proof electrical equipment to solve the problems set forth in the background art.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the switch device for the explosion-proof electrical equipment comprises a sealed protective box body, wherein a body is arranged in the protective box body, a first switch component and a second switch component are respectively arranged at the right end and the upper end of the body, an operation component and a pressure release component are respectively arranged at the right side and the upper side of the protective box body, and the first switch component is matched with the operation component for use, and the second switch component is matched with the pressure release component for use; the switch assembly I is arranged on the right side of the body and is in contact with the touch plate A and matched with the touch plate A, the inner bottom end of the protective box body is fixedly connected with a bracket, a horizontal rod is horizontally arranged in the bracket in a penetrating mode, one end of the horizontal rod is fixedly connected with the touch plate A, the other end of the horizontal rod is fixedly connected with a magnet I, a spring I made of a non-magnetic material is sleeved outside the horizontal rod, and two ends of the spring I are fixedly connected with the bracket and the magnet I respectively; the operation assembly comprises two mounting plates fixedly connected to the right side of the protection box body, a sliding groove and a fixed groove are sequentially formed in one side, opposite to the two mounting plates, of the two mounting plates, a fixed toothed plate is fixedly connected to the inner wall of the fixed groove, a magnet II in repulsive fit with the magnet I is arranged between the two mounting plates, and a moving part is connected to the right side of the magnet II; the second switch component comprises a second touch plate a arranged at the upper end of the body and a second touch plate b which can be in contact fit with the second touch plate a, and an elastic stop block is hinged at one side of the second touch plate a and one side of the second touch plate b at the upper end of the body; the pressure release subassembly is including inlaying the pressure release pipe of establishing in the protection box upper end, pressure release pipe lower extreme is sealed, the upper end is open, the upper end fixedly connected with slide bar of touch panel second b, the upper end of slide bar runs through pressure release pipe and fixedly connected with piston, and piston and the airtight sliding connection of pressure release pipe, the slide bar overcoat is equipped with the spring III, and the both ends of spring III respectively with piston, pressure release pipe inner bottom fixed connection, a plurality of relief holes first have been seted up to the lower extreme of pressure release pipe, the pressure release groove second of L type structure has been seted up to the lower extreme symmetry of piston, pressure release groove first that can communicate, U type structure with pressure release groove second has been seted up to the pressure release pipe inner wall.

Preferably, the protective box body comprises a box body with an opening at one side and a box cover which is arranged at the opening in a sealing way.

Preferably, the first touch plate a, the first touch plate b, the second touch plate a and the second touch plate b are connected in series through wires.

Preferably, the moving part comprises a moving box fixedly connected with a magnet II, the upper end and the lower end of the moving box are symmetrically and fixedly connected with sliding plates, the sliding plates are in sliding connection with sliding grooves, a gear I is rotationally connected in the moving box by using a shaft, one side of the gear I is symmetrically hinged with two connecting rods, the other ends of the connecting rods are hinged with straight rods, the other ends of the straight rods are fixedly connected with moving toothed plates capable of being meshed with fixed toothed plates, the moving toothed plates penetrate through the moving box and are arranged by the sliding plates, the upper ends of the gear I are meshed with operation toothed plates, the operation toothed plates penetrate through the moving box, a spring II and a pressing plate are fixedly connected to the inner end and the outer end of each operation toothed plate, and the other ends of the springs II are fixedly connected with the inner wall of the moving box.

Preferably, the pressure release subassembly still includes the driven pinion rack of fixed connection in the piston upper end, the pressure release subassembly is including being equipped with the fire prevention piece of being connected with driven pinion rack, the fire prevention piece includes the nitrogen gas source case of fixed connection on the pressure release pipe outer wall, the lower extreme intercommunication of nitrogen gas source case has the intake pipe, intake pipe and protection box intercommunication, install the ball valve in the intake pipe, the ball valve level sets up and has the valve rod, the valve rod runs through the pressure release pipe and rotates with pressure release pipe inner wall to be connected, coaxial fixedly connected with of valve rod and driven pinion rack meshed gear two.

Preferably, the pressure release assembly further comprises a fixed plate fixedly connected to the inner wall of the pressure release pipe, a plurality of second pressure release holes are formed in the fixed plate, a pressing switch is mounted at the lower end of the fixed plate, and the pressing switch is electrically connected with the buzzer through a power supply device to form an alarm circuit.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the first touch plate b is contacted with the first touch plate a by adjusting the distance between the second magnet and the first magnet which are in magnetic repulsion fit, and the body is arranged in the protective box body, so that explosion accidents caused by electric sparks caused by misoperation can be avoided, and in addition, the position of the first magnet relative to the first magnet is maintained through the moving part, so that the operation is simple and convenient.

In the invention, once the body is in fault and temperature rise, the touch plate B is separated from the touch plate A, the pressure relief groove B is communicated with the pressure relief groove A for pressure relief, the protection box body is prevented from being damaged, the ball valve is opened, liquid nitrogen in the nitrogen source box enters the protection box body through the air inlet pipe under the pressure of the liquid nitrogen, oxygen in the protection box body is pressed out, the fire condition is avoided, the driven toothed plate is lifted to be in contact with the pressing switch, the alarm circuit is connected, and then the buzzer is normally operated, so that a technician is reminded of paying attention to the situation so as to perform inspection and maintenance in time.

Drawings

Fig. 1 is a structural sectional view showing a front view of a switching device for explosion-proof electrical equipment according to the present invention;

FIG. 2 is an enlarged schematic diagram of the first and second switch assemblies in FIG. 1;

FIG. 3 is an enlarged schematic view of the operating assembly of FIG. 1;

fig. 4 is a sectional view showing a side view of a moving member of a switchgear for an explosion-proof electric apparatus according to the present invention;

fig. 5 is a schematic structural diagram of the pressure relief assembly of fig. 1.

In the figure: the device comprises a protection box body 1, a switch component 1, a touch plate 21, a touch plate 22, a support 23, a horizontal rod 24, a magnet 25, a spring 26, an operation component 3, a mounting plate 31, a sliding groove 32, a fixing groove 33, a fixing toothed plate 34, a moving part 35, a moving box 351, a sliding plate 352, a gear 353, a connecting rod 354, a straight rod 355, a toothed plate 356, a toothed plate 357, a spring 358, a pressing plate 359, a magnet 36, a switch component 4, a touch plate 41, a touch plate 42, a elastic stop block 43, a pressure relief component 5, a pressure relief pipe 51, a pressure relief hole 511, a pressure relief groove 512, a sliding rod 52, a piston 53, a pressure relief groove 531, a spring 54, a driven toothed plate 55, a fixed plate 56, a pressure relief hole 561, a fireproof part 57, an air inlet pipe 571, a nitrogen source box 572, a ball valve 574, a valve stem 575, a gear 575 and a pressure switch 58.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

Referring to fig. 1 to 5, a switching device for explosion-proof electrical equipment includes a sealed protection case 1, the protection case 1 including a case body having an opening at one side and a case cover sealingly installed at the opening, and a technician can open the case cover to inspect and repair a body in the protection case 1.

The protection box body 1 is internally provided with a body, the right end and the upper end of the body are respectively provided with a first switch component 2 and a second switch component 4, the right side and the upper side of the protection box body 1 are respectively provided with an operation component 3 and a pressure relief component 5, the first switch component 2 is matched with the operation component 3, the second switch component 4 is matched with the pressure relief component 5, and in addition, the first switch component 2 and the second switch component 4 jointly act on the opening or closing of the switch device. Namely, a first touch plate a21, a first touch plate b22, a second touch plate a41 and a second touch plate b42 are connected in series through wires.

Specifically, the first switch assembly 2 is arranged on the right side of the body, the first touch plate a21 is in contact fit with the first touch plate a21, the support 23 is fixedly connected to the inner bottom end of the protective box 1, the horizontal rod 24 is horizontally arranged in the support 23 in a penetrating mode, one end of the horizontal rod 24 is fixedly connected with the first touch plate b22, the other end of the horizontal rod 24 is fixedly connected with the first magnet 25, the first spring 26 made of a nonmagnetic material is sleeved outside the horizontal rod 24, the nonmagnetic material is prevented from affecting the magnetic field, two ends of the first spring 26 are fixedly connected with the support 23 and the first magnet 25 respectively, and the first touch plate b22 is separated from the first touch plate a21 under the elastic resistance of the first spring 26. The protective box body 1 is made of non-magnetic materials, so that magnetic field interference is avoided, and meanwhile, the shell of the explosion-proof electrical equipment is made of magnetic shielding materials and cannot be influenced by magnetic fields.

Specifically, the operation assembly 3 includes two mounting plates 31 fixedly connected to the right side of the protection box 1, a sliding groove 32 and a fixed groove 33 are sequentially formed on opposite sides of the two mounting plates 31, a fixed toothed plate 34 is fixedly connected to the inner wall of the fixed groove 33, a magnet two 36 in repulsive fit with the magnet one 25 is arranged between the two mounting plates 31, that is, the magnetic pole directions of the magnet one 25 and the magnet two 36 are opposite, and a moving part 35 is connected to the right side of the magnet two 36 by the two mounting plates 31;

more specifically, the moving member 35 includes a moving case 351 fixedly connected with the second magnet 36, the upper and lower ends of the moving case 351 are symmetrically and fixedly connected with a sliding plate 352, the sliding plate 352 is slidably connected with the sliding groove 32, the sliding plate 352 is made to slide in a limited manner, a first gear 353 is rotatably connected in the moving case 351 by using a shaft, one side of the first gear 353 is symmetrically hinged with two connecting rods 354, the other end of each connecting rod 354 is hinged with a straight rod 355, the other end of the straight rod 355 is fixedly connected with a moving toothed plate 356 capable of being meshed with the fixed toothed plate 34, the moving toothed plate 356 is arranged to penetrate through the moving case 351 and the sliding plate 352, and the first gear 353 rotates to drive the two straight rods 355 and the moving toothed plate 356 to move relatively through the connecting rods 354.

The upper end of the first gear 353 is meshed with an operation toothed plate 357, the operation toothed plate 357 penetrates through the movable box 351, the inner end and the outer end of the operation toothed plate 357 are respectively fixedly connected with a second spring 358 and a pressing plate 359, the other end of the second spring 358 is fixedly connected with the inner wall of the movable box 351, the horizontal movement of the operation toothed plate 357 is converted into the rotation of the first gear 353, the rotation range is limited, and on the premise that movement interference cannot occur, the second spring 358 can reset the operation toothed plate 357.

Specifically, the second switch assembly 4 includes a second touch plate a41 disposed at an upper end of the body and a second touch plate b42 capable of being in contact with the second touch plate a41, and an elastic stop block 43 is hinged at one side of the second touch plate a41 and the second touch plate b42 at an upper end of the body, the elastic stop block 43 is elastically hinged with the body, and after the slide rod 52 stops limiting the elastic stop block 43, the elastic stop block 43 resets to pair the second touch plate b42.

Specifically, the pressure release assembly 5 includes a pressure release pipe 51 embedded at the upper end of the protective case 1, the lower end of the pressure release pipe 51 is closed, the upper end is open, the upper end extends to be communicated with the safe atmosphere for pressure release, the upper end of the second touch plate b42 is fixedly connected with a slide bar 52, the upper end of the slide bar 52 penetrates through the pressure release pipe 51 and is fixedly connected with a piston 53, the piston 53 is in airtight sliding connection with the pressure release pipe 51, a third spring 54 is sleeved outside the slide bar 52, two ends of the third spring 54 are respectively fixedly connected with the piston 53 and the inner bottom wall of the pressure release pipe 51, the third spring 54 can enable the piston 53 to reset, a first pressure release hole 511 is formed in the lower end of the pressure release pipe 51, a second pressure release groove 531 of an L-shaped structure is symmetrically formed in the lower end of the piston 53, the inner wall of the pressure release pipe 51 is provided with a first pressure release groove 512 which can be communicated with the second pressure release groove 531 and is of a U-shaped structure, and the piston 53 rises to enable the second pressure release groove 531 to be communicated with the first pressure release groove 512.

Specifically, the pressure release subassembly 5 still includes fixed connection at the driven pinion rack 55 of piston 53 upper end, pressure release subassembly 5 is including being equipped with the fire prevention piece 57 of being connected with driven pinion rack 55, more specifically, fire prevention piece 57 includes nitrogen source case 572 of fixed connection on the pressure release pipe 51 outer wall, be provided with liquid nitrogen in the nitrogen source case 572, the lower extreme intercommunication of nitrogen source case 572 has intake pipe 571, intake pipe 571 and protection box 1 intercommunication, install ball valve 573 in the intake pipe 571, ball valve 573 level sets up and has valve rod 574, ball valve 573 is the closed state under the normal condition, can open ball valve 573 after valve rod 574 rotates in order to release nitrogen gas, valve rod 574 runs through pressure release pipe 51 and rotates with pressure release pipe 51 inner wall and be connected, coaxial fixedly connected with of valve rod 574 is with the gear two 575 of driven pinion rack 55 meshing, utilize the meshing of driven pinion rack 55 and gear two 575 to drive valve rod 574 rotation.

Specifically, the pressure release assembly 5 further comprises a fixed plate 56 fixedly connected to the inner wall of the pressure release pipe 51, a plurality of second pressure release holes 561 are formed in the fixed plate 56, the second pressure release holes 561 are used for pressure release, the lower end of the fixed plate 56 is provided with a push switch 58, the push switch 58 is electrically connected with a buzzer through a power supply device to form an alarm circuit, the driven toothed plate 55 is contacted with the push switch 58 to be communicated with the alarm circuit, and the buzzer works to remind technicians of checking and maintaining in time.

The working principle of the invention is as follows:

satisfy normal switch and prevent the condition that maloperation leads to the electric spark, specifically:

the contact plate II a41 and the contact plate II b42 are contacted and matched under the elastic force of the spring III 54 in a normal state, when the contact plate I is in a closed state, the contact plate II b22 is separated from the contact plate I a21 under the elastic resistance of the spring I26, and the distance between the magnet I25 and the magnet II 36 is the largest;

when the movable rack is required to be opened, the operation toothed plate 357 is pushed by the pressing plate 359, the spring II 358 is compressed, the gear 353 is driven to rotate under the meshing condition, the gear 353 drives the movable toothed plate 356 to be separated from the fixed toothed plate 34 through the connecting rod 354, the movable box 351 and the magnet II 36 are pushed towards the direction close to the magnet I25, the contact plate B22 is driven to be in contact fit with the contact plate A21 under the action of magnetic repulsive force of the magnet II 36 and the magnet I25, the pressing plate 359 is released, and the movable toothed plate 356 is meshed with the fixed toothed plate 34 again under the elasticity of the spring II 358, so that the position of the magnet II 36 relative to the magnet I25 is maintained.

Can increase, the pressure release fills nitrogen in order to prevent to produce explosion and fire to take place at the body because of the atmospheric pressure in the protective housing 1 of trouble intensification, sealed, before producing the fire, improve the safety in utilization, and is specific:

when the body is in fault and temperature rise, the air temperature of the protective box body 1 is raised, the air pressure is increased to lift the piston 53 upwards, the piston 53 drives the second contact plate b42 to lift up through the sliding rod 52 to be separated from the second contact plate a41, so that the switching device is in a closed state, the elastic stop block 43 blocks the second contact plate a41 under elastic force, subsequent contact and matching are prevented, and enough time for checking and maintenance is provided; second, the piston 53 rises to the second pressure relief groove 531 to communicate with the first pressure relief groove 512 for pressure relief, so as to avoid the damage of the protective box 1; thirdly, the piston 53 drives the driven toothed plate 55 to ascend, the driven toothed plate 55 drives the valve rod 574 to rotate through the second meshing gear 575 so as to open the ball valve 573, liquid nitrogen in the nitrogen source box 572 enters the protective box 1 through the air inlet pipe 571 under the self pressure, and oxygen in the protective box 1 is extruded, so that fire is avoided; fourth, the driven toothed plate 55 rises to contact the push switch 58, and the alarm circuit is turned on to make the buzzer work normally, so that the technician is reminded to pay attention to the inspection and maintenance in time.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (6)

1. A switching device for an explosion-proof electrical apparatus, characterized by: the protective box comprises a sealed protective box body (1), wherein a body is arranged in the protective box body (1), a first switch component (2) and a second switch component (4) are respectively arranged at the right end and the upper end of the body, an operation component (3) and a pressure release component (5) are respectively arranged at the right side and the upper side of the protective box body (1), the first switch component (2) is matched with the operation component (3), and the second switch component (4) is matched with the pressure release component (5);

the switch assembly I (2) is arranged on a touch plate I a (21) on the right side of the body and a touch plate I b (22) in contact fit with the touch plate I a (21), a support (23) is fixedly connected to the inner bottom end of the protective box body (1), a horizontal rod (24) is horizontally arranged in the support (23) in a penetrating mode, one end of the horizontal rod (24) is fixedly connected with the touch plate I b (22), the other end of the horizontal rod (24) is fixedly connected with a magnet I (25), a spring I (26) made of a non-magnetic material is sleeved outside the horizontal rod (24), and two ends of the spring I (26) are fixedly connected with the support (23) and the magnet I (25) respectively;

the operation assembly (3) comprises two mounting plates (31) fixedly connected to the right side of the protection box body (1), a sliding groove (32) and a fixing groove (33) are sequentially formed in one side, opposite to the mounting plates (31), a fixing toothed plate (34) is fixedly connected to the inner wall of the fixing groove (33), a magnet II (36) in repulsive fit with the magnet I (25) is arranged between the two mounting plates (31), and a moving part (35) is connected to the right side of the magnet II (36) through the two mounting plates (31);

the second switch assembly (4) comprises a second touch plate a (41) arranged at the upper end of the body and a second touch plate b (42) which can be in contact fit with the second touch plate a (41), and an elastic stop block (43) is hinged at one side of the second touch plate a (41) and one side of the second touch plate b (42) at the upper end of the body;

the pressure relief assembly (5) comprises a pressure relief pipe (51) embedded at the upper end of the protective box body (1), the lower end of the pressure relief pipe (51) is closed, the upper end of the pressure relief pipe (51) is open, the upper end of the touch plate B (42) is fixedly connected with a slide rod (52), the upper end of the slide rod (52) penetrates through the pressure relief pipe (51) and is fixedly connected with a piston (53), the piston (53) is in airtight sliding connection with the pressure relief pipe (51), a spring III (54) is sleeved outside the slide rod (52), the two ends of the spring III (54) are fixedly connected with the piston (53) and the inner bottom wall of the pressure relief pipe (51) respectively, a plurality of pressure relief holes I (511) are formed in the lower end of the pressure relief pipe (51), and pressure relief grooves II (531) of an L-shaped structure are symmetrically formed in the lower end of the piston (53), and pressure relief grooves I (512) of a U-shaped structure are formed in the inner wall of the pressure relief pipe (51).

2. A switching device for explosion-proof electrical equipment according to claim 1, wherein: the protective box body (1) comprises a box body with an opening at one side and a box cover which is arranged at the opening in a sealing way.

3. A switching device for explosion-proof electrical equipment according to claim 1, wherein: the first touch plate a (21), the first touch plate b (22), the second touch plate a (41) and the second touch plate b (42) are connected in series through wires.

4. A switching device for explosion-proof electrical equipment according to claim 1, wherein: the movable part (35) comprises a movable box (351) fixedly connected with a magnet II (36), the upper end and the lower end of the movable box (351) are symmetrically and fixedly connected with a sliding plate (352), the sliding plate (352) is in sliding connection with a sliding groove (32), a first gear (353) is rotatably connected in the movable box (351) through a shaft, one side of the first gear (353) is symmetrically hinged with two connecting rods (354), the other end of each connecting rod (354) is hinged with a straight rod (355), the other end of the straight rod (355) is fixedly connected with a movable toothed plate (356) which can be meshed with a fixed toothed plate (34), the movable toothed plate (356) is communicated with the movable box (351) and the sliding plate (352), an operation toothed plate (357) is meshed with the upper end of the first gear (353), two springs (358) and a pressing plate (359) are fixedly connected to the inner end and the outer end of the operation toothed plate (357) respectively, and the other end of each spring II (358) is fixedly connected with the inner wall of the movable box (351).

5. A switching device for explosion-proof electrical equipment according to claim 1, wherein: the pressure relief assembly (5) further comprises a driven toothed plate (55) fixedly connected to the upper end of the piston (53), the pressure relief assembly (5) comprises a fireproof piece (57) connected with the driven toothed plate (55), the fireproof piece (57) comprises a nitrogen source box (572) fixedly connected to the outer wall of the pressure relief pipe (51), the lower end of the nitrogen source box (572) is communicated with an air inlet pipe (571), the air inlet pipe (571) is communicated with the protective box body (1), a ball valve (573) is arranged in the air inlet pipe (571), the ball valve (573) is horizontally arranged and provided with a valve rod (574), the valve rod (574) penetrates the pressure relief pipe (51) and is connected with the inner wall of the pressure relief pipe (51) in a rotating mode, and the valve rod (574) is fixedly connected with a gear II (575) meshed with the driven toothed plate (55) in a coaxial mode.

6. A switching device for explosion-proof electrical equipment according to claim 5, wherein: the pressure relief assembly (5) further comprises a fixed plate (56) fixedly connected to the inner wall of the pressure relief pipe (51), a plurality of pressure relief holes II (561) are formed in the fixed plate (56), a pressing switch (58) is arranged at the lower end of the fixed plate (56), and the pressing switch (58) is electrically connected with the buzzer through a power supply device to form an alarm circuit.

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