阅读说明：本技术 配电箱用气动断送电与除尘装置及方法 (Pneumatic power-off and power-on and dust-removal device and method for distribution box ) 是由 程强 徐丽 何瑞 孙文波 杜海涛 于 2019-08-16 设计创作，主要内容包括：本发明涉及一种配电箱用气动断送电与除尘装置及方法。其技术方案是：电键的外侧通过连接杆连接到电键控制气缸,所述电键控制气缸通过闭合气管线和连接到控制换向气阀,所述控制换向气阀通过远程输气管线连接到空压机储气罐,且远程输气管线上设有截止阀,所述空压机储气罐连接空气压缩机,通过空气压缩机对控制换向气阀进行打压实现电键的开关；所述配电箱主体的下侧设有除尘管,除尘管上设有电磁阀,并连接到空压机储气罐。有益效果是：本发明以气体为动力,可以避免或减少了电磁场对人的生理的干扰,通过尘埃吸引电容、气电路开启线圈和整流器组成的感应电路,使自动感应并除尘成为了可能,避免了人工操作除尘带来的身体的伤害。(The invention relates to a pneumatic power-off and power-on and dust-removal device and method for a distribution box. The technical scheme is as follows: the outer side of the key is connected to a key control cylinder through a connecting rod, the key control cylinder is connected to a control reversing air valve through a closed air pipeline, the control reversing air valve is connected to an air compressor air storage tank through a remote air pipeline, a stop valve is arranged on the remote air pipeline, the air compressor air storage tank is connected with an air compressor, and the control reversing air valve is pressed through the air compressor to realize the on-off of the key; the downside of block terminal main part is equipped with the dust removal pipe, is equipped with the solenoid valve on the dust removal pipe to be connected to the air compressor machine gas holder. The beneficial effects are that: the invention takes gas as power, can avoid or reduce the interference of electromagnetic field to human physiology, and the dust attracting capacitor, the gas circuit start the induction circuit composed of the coil and the rectifier, so that the automatic induction and dust removal become possible, and the harm to human body caused by manual operation dust removal is avoided.)

1. The utility model provides a block terminal is with pneumatic disconnected power transmission and dust collector, characterized by: comprises a distribution box main body (1), a high-voltage service wire (2), a key (3), a key control cylinder (6), a control reversing air valve (8), a remote air transmission pipeline (9), a reversing handle (12), an external starting interface (13), an air compressor air storage tank (14), an air compressor (15), a pressure relay (18), a first stop valve (19 a), a second stop valve (19 b), an electromagnetic valve (20), a dust removal pipe (21), a power binding post (22), a power supply binding post (23), a key fixing plate (24), a power contact (25), a fixing bolt (26), a relay (27), a fuse (28) and a transformer (29), wherein the high-voltage service wire (2) is connected to the power binding post (22) in the inner cavity of the distribution box main body (1) and is fixed on the inner wall of the distribution box main body (1) through the key fixing plate (24) and an insulating block (32, a power contact (25) is arranged on the outer side of the power binding post (22), a corresponding power supply binding post (23) is arranged on the lower side of the power binding post (22), a power supply contact (34) is arranged on the outer side of the power supply binding post (23), the power supply binding post (23) is connected with a relay (27) and a transformer (29) through a fuse (28), the transformer (29) outputs a low-voltage working power supply (5), and a dust removal induction control device is arranged on the distribution box main body (1); the power contact (25) and the power supply contact (34) are matched with a key (3), the outer side of the key (3) is connected to a key control cylinder (6) through a connecting rod, the key control cylinder (6) is connected to a control reversing air valve (8) through a closed air pipeline (10), the control reversing air valve (8) is connected to an air compressor air storage tank (14) through a remote air pipeline (9), a first stop valve (19 a) and a second stop valve (19 b) are arranged on the remote air pipeline (9), the air compressor air storage tank (14) is connected with an air compressor (15), and the control reversing air valve (8) is pressurized through the air compressor (15) to realize the on-off of the key (3); the downside of switch board main part (1) is equipped with dust removal pipe (21), is equipped with solenoid valve (20) on dust removal pipe (21) to be connected to air compressor machine gas holder (14) to under dust removal induction control device's control, air compressor (15) carry switch board main part (1) with compressed gas through dust removal pipe (21), remove dust to switch board main part (1) inner chamber.

2. The pneumatic power-off, power-on and dust-removal device for the distribution box of claim 1, which is characterized in that: the key (3) include key upper contact (3.1), key lower contact (3.2), bridge type connector (3.3), switch execution block (3.4), fixed key upper contact (3.1) in the upper end of bridge type connector (3.3), fixed key lower contact (3.2) of lower extreme, the outside of bridge type connector (3.3) is equipped with switch execution block (3.4), and switch execution block (3.4) is connected fixedly with connecting block (35) in the outside of key (3), and drives connecting block (35) through key control cylinder (6) and move from top to bottom, drives bridge type connector (3.3) and moves from top to bottom, and then makes key upper contact (3.1) and key lower contact (3.2) insert power contact (25) and power supply contact (34) and form the circular telegram, perhaps shifts out power contact (25) and power supply contact (34) and forms the outage state.

3. The pneumatic power-off, power-on and dust-removal device for the distribution box of claim 2, which is characterized in that: the upper contact (3.1) of the key is of a convex structure, the lower part of the upper contact is a contact increasing surface (3.5), the power contact (25) is of a groove shape, and the upper contact (3.1) of the key and the power contact (25) are matched with each other; the lower contact (3.2) of the key is of a convex structure, the lower part of the lower contact is a contact increasing contact surface (3.5), the power supply contact (34) is of a groove shape, and the lower contact (3.2) of the key and the power supply contact (34) are matched with each other.

4. The pneumatic power-off, power-on and dust-removal device for the distribution box of claim 1, which is characterized in that: key control cylinder (6) are including cylinder main part (6.1), lower piston (6.2) and last lid (6.3), inner chamber in cylinder main part (6.1) is equipped with the connecting rod, the bottom of connecting rod is equipped with down piston (6.2), it has outage safety spring (7) to overlap in the connecting rod outside, the connecting rod upwards passes connecting block (35) that last lid (6.3) are connected to the outside of key (3), and connect closed trachea line (10) in the bottom of cylinder main part (6.1), connect outage trachea line (11) at the top of cylinder main part (6.1).

5. The pneumatic power-off, power-on and dust-removal device for the distribution box of claim 4, which is characterized in that: a plurality of groups of connecting rod fixing holes which are arranged side by side are longitudinally arranged in the inner cavity of the connecting block (35), and a plurality of penetrating outer holes are transversely arranged on the outer wall of the connecting block (35); the connecting rod axial is equipped with a plurality of holes that run through, inserts the connecting rod fixed orifices back at the connecting rod, inserts through the hole along running through the outer hole through the fixed pin and realizes the locking.

6. The pneumatic power-off, power-on and dust-removal device for the distribution box of claim 1, which is characterized in that: the dust removal induction control device comprises an electromagnetic valve (20), a needle valve opening coil (20.3), a gas circuit opening armature (20.4), a gas circuit opening coil (20.5), a dust attraction capacitor (20.6) and a rectifier (20.7), wherein the input end of the rectifier (20.7) is connected to a low-voltage working power supply (5), the output end of the rectifier is connected to the gas circuit opening coil (20.5), the gas circuit opening coil (20.5) is connected with the dust attraction capacitor (20.6), and a gas circuit opening circuit is formed by the rectifier (20.7), the gas circuit opening coil (20.5) and the dust attraction capacitor (20.6); coil (20.5) are opened to the gas circuit and are installed in one side that armature (20.4) were opened to the gas circuit, just the one end that armature (20.4) were opened to the gas circuit is connected to low pressure working power supply (5), and the other end opens coil (20.3) through the needle valve and is connected to low pressure working power supply (5), and one side that coil (20.3) were opened to the needle valve is equipped with solenoid valve (20).

7. the pneumatic power-off, power-on and dust-removal device for the distribution box of claim 6, which is characterized in that: the electromagnetic valve (20) comprises an electromagnetic dust removal valve body (20.1) and an electromagnetic dust removal needle valve (20.2), the electromagnetic dust removal needle valve (20.2) is installed in the inner cavity of the electromagnetic dust removal valve body (20.1), the air inlet end of the electromagnetic dust removal valve body (20.1) is connected with a remote air pipeline (9), and the air outlet end of the electromagnetic dust removal valve body is connected into the distribution box main body (1) through a dust removal pipe (21); after the electromagnetic dust removal needle valve (20.2) is opened, compressed gas of the remote gas transmission pipeline (9) is sprayed into the distribution box main body (1) through the dust removal pipe (21) to remove dust.

8. the pneumatic power-off, power-on and dust-removal device for the distribution box of claim 1, which is characterized in that: the remote gas transmission pipeline (9) is provided with an externally-matched starting interface (13) and is arranged between the control reversing gas valve (8) and the first stop valve (19 a).

9. The pneumatic power-off, transmission and dust removal device for the distribution box of claim 8, which is characterized in that: the external starting interface (13) is connected with a manual gas compression device, the manual gas compression device comprises a gas exchange connector (a), a sealing cylinder sleeve (b), a sealing piston (c), a work applying screw rod (d), a force applying nut (e), a connecting lock cap (f), a fixing screw (g), a connecting pin (h), a check pin (i), a transition nut (j) and a hand wheel (k), one end of the sealing cylinder sleeve (b) is movably connected with the gas exchange connector (a), the other end of the sealing cylinder sleeve is connected with the force applying nut (e) through the check pin (i), and a vent nozzle is arranged in the center of the gas exchange connector (a) and movably connected with the external starting interface (13); the center of the force application nut (e) is provided with a work applying screw rod (d), the outer end of the work applying screw rod (d) is provided with a hand wheel (k), the inner end of the work applying screw rod (d) is connected with the sealing piston (c) through a connecting lock cap (f) and a connecting pin (h), the work applying screw rod (d) is driven to rotate along the force application nut (e) through rotating the hand wheel (k), the front and back movement of the work applying screw rod (d) is achieved, and the sealing piston (c) is driven to move forwards or backwards.

10. A method for using the pneumatic power-off, power-on and dust-removing device for the distribution box according to any one of claims 1 to 9, which is characterized in that: the method comprises the following steps:

firstly, after the whole equipment is connected and a high-voltage service wire (2) is powered on, a first stop valve (19 a) and a second stop valve (19 b) are closed, so that P → A of a control reversing air valve (8) is conducted, an external starting interface (13) is started, and gas with set pressure is injected into a system, at the moment, the P → A of the control reversing air valve (8) is conducted, so that under the action of a key control cylinder (6), a connecting block (35) drives an upper key contact and a lower key contact to move upwards, the upper key contact is contacted with a power contact (25), and the lower key contact is contacted with a power supply contact (34), so that a bus circuit is connected; at the moment, the connecting rod and the lower piston (6.2) in the cylinder (6) are controlled to move upwards by a key, so that the power-off safety spring (7) is in an extrusion energy storage state;

after the whole system is in a connected working state, the pressure relay (18) is connected to enable the air compressor (15) to work, compressed air is stored in an air storage tank (14) of the air compressor, when the pressure reaches a set value, the pressure relay (18) is disconnected to enable the air compressor (15) to stop working, at the moment, a first stop valve (19 a) and a second stop valve (19 b) can be opened, one path of the compressed air in the air storage tank (14) of the air compressor is communicated to a dust removal pipe (21) and an electromagnetic valve through a remote air transmission pipe (9), and the other path of the compressed air is communicated to a control reversing air valve (8) to replace gas with the set pressure of an externally-matched starting interface (13), so that the whole system is in a normal working state;

when the circuit of the distribution box needs to be cut off, an operator operates a reversing handle (12) on a control reversing air valve (8) to enable the working state of the control reversing air valve (8) to be in a P → B conduction state, compressed air in an air compressor air storage tank (14) reversely pushes a lower piston through the upper part of an electric key control cylinder (6), meanwhile, under the action of a power-off safety spring (7), the lower piston moves downwards, air of the lower piston is conducted along A → O of the control reversing air valve (8) to discharge the air, so that a connecting rod is driven to move downwards, an upper contact of an electric key and a lower contact of the electric key move downwards, and the main circuit is disconnected;

When the switch needs to be switched on again, the reversing handle (12) is operated to enable the P → A of the reversing air valve (8) to be conducted, compressed air in an air storage tank (14) of the air compressor controls the lower part of the air cylinder (6) to push a lower piston in a forward direction through a key, meanwhile, the outage safety spring (7) is extruded to enable the piston to store energy, the connecting rod drives the connecting block (35) to move upwards, the upper contact of the key is enabled to be in contact with the power contact (25), and the lower contact of the key is enabled to be in contact with the power supply contact (34), so that;

Fourthly, when the pressure in the air storage tank (14) of the air compressor changes, the whole system can maintain the relative balance of the pressure of the whole system through the opening of the air compressor (15) under the action of the air valve (17);

fifthly, the dust attraction capacitor (20.6) is arranged on one side of the distribution box main body (1), a large amount of dust is attracted on the dust attraction capacitor (20.6) through the rectification function of the rectifier (20.7), when the dust concentration in the air around the distribution box main body (1) is high, an air-electricity opening circuit formed by the rectifier (20.7), the air circuit opening coil (20.5) and the dust attraction capacitor (20.6) can form a passage, when the passage is formed, the air circuit opening coil (20.5) attracts the air circuit to open the armature (20.4), the needle valve opening coil (20.3) generates a magnetic field to attract the electromagnetic dust removal needle valve (20.2) to be opened, and the dust removal pipe (21) sprays compressed gas into the inner cavity of the distribution box main body to remove dust;

When the dust concentration is reduced, an air-electricity opening circuit consisting of the rectifier (20.7), the air-circuit opening coil (20.5) and the dust suction capacitor (20.6) is broken, the electromagnetic dust removal needle valve (20.2) is closed, and compressed air of the dust removal pipe (21) is disconnected to maintain the working state.

Technical Field

the invention relates to a distribution box for electric power and a method thereof, in particular to a pneumatic power-off and power-transmission and dust-removal device and a method thereof for the distribution box.

Background

The electric power is the power of modern industry, in the transmission process of electric power, the condition that high voltage becomes low voltage is the condition that power department often meets, at present, the operation of changing high voltage to low voltage on the block terminal is mostly manual operation, its process is, an operation, more than two people monitor, this is the important safety measure who writes into the operating instructions, otherwise is not allowed to operate, like this, the operation is not only troublesome, and the operating personnel still can receive electromagnetic interference and influence people's physical and mental health, therefore, we invented the device of pneumatic outage power transmission.

in addition, the wiring box also involves the problem of dust protection: firstly, in order to prevent the components exposed in the cabinet from being not covered by dust, if the components are covered by the dust and then absorb moisture in the air, the components exposed in part are corroded, and faults such as insulation degree reduction, short circuit, grounding and the like can be caused for a long time, and even the danger of electric shock can be caused; and secondly, due to excessive dust covering, the electrostatic current is too high under the condition of air humidity, so that the danger of electric shock during operation is avoided, the box components are corroded by the excessive dust covering, and the service life of the components is greatly shortened. The existing dust prevention generally adopts electrostatic dust collection. Electrostatic dust collection is a dust collection method in which an electrostatic field is used to ionize gas so that dust particles are electrically adsorbed to an electrode. In a strong electric field, air molecules are ionized into positive ions and electrons, and the electrons encounter dust particles in the process of running to the positive electrode, so that the dust particles are negatively charged and adsorbed to the positive electrode to be collected. Of course, in recent years, there is a method of collecting dust by using a negative plate, by technological innovation. In the past, the method is commonly used in factories and power stations which take coal as fuel, and the coal ash and dust in flue gas are collected. Note that: under the electrified condition of the power distribution cabinet, the dust removal operation needs to be carried out by professional electricians.

chinese patent publication No. 109999600A, entitled "dust removing device for distribution box", comprises a box body, a support column and a transducer; a first mounting bin and a second mounting bin are arranged in the box body; a first placing bin and a second placing bin are arranged in the second mounting bin; a dust collecting box and a first air extractor are arranged in the second placing bin; the dust collecting box is provided with a second exhaust hole and a first air inlet hole, and a filter bag is arranged in the dust collecting box; the first air exhaust device is respectively communicated with the first installation bin and the second placing bin; a second air extracting device and an air dust removing component are arranged in the first placing bin; the air outlet end of the second air extractor is respectively connected with the air inlet end of the air dedusting assembly; the air outlet ends of the air dust removal assemblies are respectively communicated with the first mounting bins; the supporting column is arranged on the box body and provided with a hollow bin; lifting devices are arranged in the hollow bins; the telescopic ends of the lifting device are respectively connected with the walking wheels. This patent technique is through ultrasonic wave vibrations components and parts, and the air fit removes dust, and this operation needs the block terminal to have a power failure the operation, does not remove dust at electrified, has influenced the supply of electric power.

The Chinese patent document publication No. 107800045A, the patent name of which is 'a dust removal device for distribution boxes', comprises an insulating frame arranged on an air blowing port of the distribution box; a metal net capable of shaking and an electrostatic generator connected with the metal net are arranged in the insulating frame; the insulating frame is provided with four side walls, and a spring is connected between each side wall and the metal mesh; an electromagnet for adsorbing the metal mesh is arranged on one side wall of the insulating frame; the electromagnet and the static generator are connected to the same electric loop. Compared with the prior art, this basic scheme simple structure, convenient to use clears up the dust in the block terminal through the metal mesh, can not touch the circuit board among the clearance process, can prevent effectively that the circuit board from leading to the trouble because artifical clearance. The scheme adopts an electrostatic generator, and the dust collection method is that the electrostatic generator ionizes gas by using an electrostatic field so as to enable dust particles to be adsorbed on an electrode in an electrified way.

disclosure of Invention

the invention aims to provide a pneumatic power-off and power-on and dust-removal device and method for a distribution box, aiming at the defects in the prior art, on one hand, the device for pneumatic power-off and power-on is designed, the power-off and power-on of the distribution box can be controlled remotely, operators are reduced, and the safety coefficient is improved; on the other hand, in order to reduce the labor intensity of electricians and reduce the influence on physical and psychological health of people caused by electromagnetic interference, a dust removal device is added, and the dust cleaning function is realized.

the invention provides a pneumatic power-off, power transmission and dust removal device for a distribution box, which adopts the technical scheme that: comprises a distribution box main body (1), a high-voltage service wire (2), a key (3), a key control cylinder (6), a control reversing air valve (8), a remote air transmission pipeline (9), a reversing handle (12), an external starting interface (13), an air compressor air storage tank (14), an air compressor (15), a pressure relay (18), a first stop valve (19 a), a second stop valve (19 b), an electromagnetic valve (20), a dust removal pipe (21), a power binding post (22), a power supply binding post (23), a key fixing plate (24), a power contact (25), a fixing bolt (26), a relay (27), a fuse (28) and a transformer (29), wherein the high-voltage service wire (2) is connected to the power binding post (22) in the inner cavity of the distribution box main body (1) and is fixed on the inner wall of the distribution box main body (1) through the key fixing plate (24) and an insulating block (32, a power contact (25) is arranged on the outer side of the power binding post (22), a corresponding power supply binding post (23) is arranged on the lower side of the power binding post (22), a power supply contact (34) is arranged on the outer side of the power supply binding post (23), the power supply binding post (23) is connected with a relay (27) and a transformer (29) through a fuse (28), the transformer (29) outputs a low-voltage working power supply (5), and a dust removal induction control device is arranged on the distribution box main body (1); the power contact (25) and the power supply contact (34) are matched with a key (3), the outer side of the key (3) is connected to a key control cylinder (6) through a connecting rod, the key control cylinder (6) is connected to a control reversing air valve (8) through a closed air pipeline (10), the control reversing air valve (8) is connected to an air compressor air storage tank (14) through a remote air pipeline (9), a first stop valve (19 a) and a second stop valve (19 b) are arranged on the remote air pipeline (9), the air compressor air storage tank (14) is connected with an air compressor (15), and the control reversing air valve (8) is pressurized through the air compressor (15) to realize the on-off of the key (3); the downside of switch board main part (1) is equipped with dust removal pipe (21), is equipped with solenoid valve (20) on dust removal pipe (21) to be connected to air compressor machine gas holder (14) to under dust removal induction control device's control, air compressor (15) carry switch board main part (1) with compressed gas through dust removal pipe (21), remove dust to switch board main part (1) inner chamber.

preferably, the key (3) comprises a key upper contact (3.1), a key lower contact (3.2), a bridge connector (3.3) and a switch execution block (3.4), the upper end of the bridge connector (3.3) is fixed with the key upper contact (3.1), the lower end of the bridge connector is fixed with the key lower contact (3.2), the switch execution block (3.4) is arranged on the outer side of the bridge connector (3.3), the switch execution block (3.4) is fixedly connected with a connecting block (35) on the outer side of the key (3), the key control cylinder (6) drives the connecting block (35) to move up and down to drive the bridge connector (3.3) to move up and down, and then the key upper contact (3.1) and the key lower contact (3.2) are inserted into the power contact (25) and the power supply contact (34) to form a power supply circuit, or the power contact (25) and the power supply contact (34) are moved out to form a power supply circuit.

Preferably, the upper contact (3.1) of the key is of a convex structure, the lower part of the upper contact is a contact increasing surface (3.5), the power contact (25) is of a groove shape, and the upper contact (3.1) of the key and the power contact (25) are matched with each other; the lower contact (3.2) of the key is of a convex structure, the lower part of the lower contact is a contact increasing contact surface (3.5), the power supply contact (34) is of a groove shape, and the lower contact (3.2) of the key and the power supply contact (34) are matched with each other.

preferably, above-mentioned key control cylinder (6) includes cylinder main part (6.1), piston (6.2) and upper cover body (6.3) down, inner chamber at cylinder main part (6.1) is equipped with the connecting rod, the bottom of connecting rod is equipped with piston (6.2) down, it has outage safety spring (7) to overlap in the connecting rod outside, the connecting rod upwards passes upper cover body (6.3) and is connected to connecting block (35) in the outside of key (3), and connect closed trachea line (10) in the bottom of cylinder main part (6.1), connect outage trachea line (11) at the top of cylinder main part (6.1).

Preferably, a plurality of groups of connecting rod fixing holes arranged side by side are longitudinally arranged in the inner cavity of the connecting block (35), and a plurality of penetrating outer holes are transversely arranged on the outer wall of the connecting block (35); the connecting rod axial is equipped with a plurality of holes that run through, inserts the connecting rod fixed orifices back at the connecting rod, inserts through the hole along running through the outer hole through the fixed pin and realizes the locking.

Preferably, the dedusting induction control device comprises an electromagnetic valve (20), a needle valve opening coil (20.3), a gas circuit opening armature (20.4), a gas circuit opening coil (20.5), a dust attraction capacitor (20.6) and a rectifier (20.7), wherein the input end of the rectifier (20.7) is connected to the low-voltage working power supply (5), the output end of the rectifier is connected to the gas circuit opening coil (20.5), the gas circuit opening coil (20.5) is connected to the dust attraction capacitor (20.6), and the rectifier (20.7), the gas circuit opening coil (20.5) and the dust attraction capacitor (20.6) form a gas circuit opening circuit; coil (20.5) are opened to the gas circuit and are installed in one side that armature (20.4) were opened to the gas circuit, just the one end that armature (20.4) were opened to the gas circuit is connected to low pressure working power supply (5), and the other end opens coil (20.3) through the needle valve and is connected to low pressure working power supply (5), and one side that coil (20.3) were opened to the needle valve is equipped with solenoid valve (20).

preferably, the electromagnetic valve (20) comprises an electromagnetic dust removal valve body (20.1) and an electromagnetic dust removal needle valve (20.2), the electromagnetic dust removal needle valve (20.2) is installed in the inner cavity of the electromagnetic dust removal valve body (20.1), the air inlet end of the electromagnetic dust removal valve body (20.1) is connected with the remote air pipeline (9), and the air outlet end is connected into the distribution box main body (1) through a dust removal pipe (21); after the electromagnetic dust removal needle valve (20.2) is opened, compressed gas of the remote gas transmission pipeline (9) is sprayed into the distribution box main body (1) through the dust removal pipe (21) to remove dust.

Preferably, the remote gas pipeline (9) is provided with an externally-matched starting interface (13) and is arranged between the control reversing valve (8) and the first stop valve (19 a).

preferably, the externally-matched starting interface (13) is connected with a manual gas compression device, the manual gas compression device comprises a gas exchange joint (a), a sealing cylinder sleeve (b), a sealing piston (c), a work-doing screw (d), a force-applying nut (e), a connecting lock cap (f), a fixing screw (g), a connecting pin (h), a check pin (i), a transition nut (j) and a hand wheel (k), one end of the sealing cylinder sleeve (b) is movably connected with the gas exchange joint (a), the other end of the sealing cylinder sleeve is connected with the force-applying nut (e) through the check pin (i), and a vent nozzle is arranged in the center of the gas exchange joint (a) and movably connected with the externally-matched starting interface (13); the center of the force application nut (e) is provided with a work applying screw rod (d), the outer end of the work applying screw rod (d) is provided with a hand wheel (k), the inner end of the work applying screw rod (d) is connected with the sealing piston (c) through a connecting lock cap (f) and a connecting pin (h), the work applying screw rod (d) is driven to rotate along the force application nut (e) through rotating the hand wheel (k), the front and back movement of the work applying screw rod (d) is achieved, and the sealing piston (c) is driven to move forwards or backwards.

The invention provides a using method of a pneumatic power-off, power-transmission and dust-removal device for a distribution box, which comprises the following steps:

Firstly, after the whole equipment is connected and a high-voltage service wire (2) is powered on, a first stop valve (19 a) and a second stop valve (19 b) are closed, so that P → A of a control reversing air valve (8) is conducted, an external starting interface (13) is started, and gas with set pressure is injected into a system, at the moment, the P → A of the control reversing air valve (8) is conducted, so that under the action of a key control cylinder (6), a connecting block (35) drives an upper key contact and a lower key contact to move upwards, the upper key contact is contacted with a power contact (25), and the lower key contact is contacted with a power supply contact (34), so that a bus circuit is connected; at the moment, the connecting rod and the lower piston (6.2) in the cylinder (6) are controlled to move upwards by a key, so that the power-off safety spring (7) is in an extrusion energy storage state;

After the whole system is in a connected working state, the pressure relay (18) is connected to enable the air compressor (15) to work, compressed air is stored in an air storage tank (14) of the air compressor, when the pressure reaches a set value, the pressure relay (18) is disconnected to enable the air compressor (15) to stop working, at the moment, a first stop valve (19 a) and a second stop valve (19 b) can be opened, one path of the compressed air in the air storage tank (14) of the air compressor is communicated to a dust removal pipe (21) and an electromagnetic valve through a remote air transmission pipe (9), and the other path of the compressed air is communicated to a control reversing air valve (8) to replace gas with the set pressure of an externally-matched starting interface (13), so that the whole system is in a normal working state;

When the circuit of the distribution box needs to be cut off, an operator operates a reversing handle (12) on a control reversing air valve (8) to enable the working state of the control reversing air valve (8) to be in a P → B conduction state, compressed air in an air compressor air storage tank (14) reversely pushes a lower piston through the upper part of an electric key control cylinder (6), meanwhile, under the action of a power-off safety spring (7), the lower piston moves downwards, air of the lower piston is conducted along A → O of the control reversing air valve (8) to discharge the air, so that a connecting rod is driven to move downwards, an upper contact of an electric key and a lower contact of the electric key move downwards, and the main circuit is disconnected;

When the switch needs to be switched on again, the reversing handle (12) is operated to enable the P → A of the reversing air valve (8) to be conducted, compressed air in an air storage tank (14) of the air compressor controls the lower part of the air cylinder (6) to push a lower piston in a forward direction through a key, meanwhile, the outage safety spring (7) is extruded to enable the piston to store energy, the connecting rod drives the connecting block (35) to move upwards, the upper contact of the key is enabled to be in contact with the power contact (25), and the lower contact of the key is enabled to be in contact with the power supply contact (34), so that;

fourthly, when the pressure in the air storage tank (14) of the air compressor changes, the whole system can maintain the relative balance of the pressure of the whole system through the opening of the air compressor (15) under the action of the air valve (17);

Fifthly, the dust attraction capacitor (20.6) is arranged on one side of the distribution box main body (1), a large amount of dust is attracted on the dust attraction capacitor (20.6) through the rectification function of the rectifier (20.7), when the dust concentration in the air around the distribution box main body (1) is high, an air-electricity opening circuit formed by the rectifier (20.7), the air circuit opening coil (20.5) and the dust attraction capacitor (20.6) can form a passage, when the passage is formed, the air circuit opening coil (20.5) attracts the air circuit to open the armature (20.4), the needle valve opening coil (20.3) generates a magnetic field to attract the electromagnetic dust removal needle valve (20.2) to be opened, and the dust removal pipe (21) sprays compressed gas into the inner cavity of the distribution box main body to remove dust;

when the dust concentration is reduced, an air-electricity opening circuit consisting of the rectifier (20.7), the air-circuit opening coil (20.5) and the dust suction capacitor (20.6) is broken, the electromagnetic dust removal needle valve (20.2) is closed, and compressed air of the dust removal pipe (21) is disconnected to maintain the working state.

the invention has the beneficial effects that: the invention takes gas as power, and utilizes a mechanical structure to finish the action of manual operation, and the gas (gas source) can be remotely conveyed, so that the interference of an electromagnetic field to the physiology of people can be avoided or reduced, and meanwhile, dust can automatically discharge high voltage to cause the hazards of static electricity, fire and the like, so that an induction circuit consisting of a coil and a rectifier is opened through a dust attraction capacitor and a gas circuit, the automatic induction and dust removal become possible, and the physical damage caused by manual operation dust removal is avoided;

In a word, the system of the invention is completely reliable in operation, firstly, the system is far away from a high-voltage power supply, so that the damage of an electromagnetic field to operators and guardians is avoided; the system is powered off, and the whole power transmission and outage system is safe due to the arrangement of the key control cylinder, the power outage safety spring and the control reversing air valve; in addition, the system of the invention can automatically sense and remove dust, thereby reducing the labor intensity of workers, and the dust removal effect of the whole system is more reliable and safer because the dust removal is mechanically automatic and set.

Drawings

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

FIG. 2 is a cross-sectional view A-A of the bus circuit of FIG. 1;

FIG. 3 is a cross-sectional view A-A of the bus of FIG. 1, broken away;

FIG. 4 is an enlarged view of a portion of the key and power supply contacts;

FIG. 5 is a side view of the key and power supply contacts;

FIG. 6 is a top view of the key and power supply contacts;

FIG. 7 is a top plan view of a second embodiment of the key and power supply contacts;

FIG. 8 is a top view of the connector block;

FIG. 9 is a circuit diagram of the dust removal sensing control apparatus;

FIG. 10 is a schematic view of the structure of a manual gas compressing device;

FIG. 11 is an enlarged fragmentary view of the key controlled cylinder;

FIG. 12 is a cross-sectional view A-A of an alternative configuration of the bus access of FIG. 1;

In the upper diagram: the power distribution box comprises a distribution box main body 1, a high-voltage service wire 2, a key 3, a work indicator lamp 4, a low-voltage work power supply 5, a key control cylinder 6, a power-off safety spring 7, a control reversing air valve 8, a remote air pipeline 9, a closed air pipeline 10, a power-off air pipeline 11, a reversing handle 12, an external starting interface 13, an air compressor air storage tank 14, an air compressor 15, a pressure gauge 16, a safety valve 17, a pressure relay 18, a first stop valve 19a, a second stop valve 19b, an electromagnetic valve 20, a dust removal pipe 21, a power wiring terminal 22, a power supply wiring terminal 23, a key fixing plate 24, a power contact 25, a fixing bolt 26, a relay 27, a fuse 28, a transformer 29, a power supply mutual inductor 30, a work mutual inductor 31, an insulating block 32, a rubber elastic block 33;

The key comprises a key upper contact 3.1, a key lower contact 3.2, a bridge type connecting body 3.3, a switch execution block 3.4, a contact increasing contact surface 3.5, a connecting screw hole 3.6, a cylinder main body 6.1, a lower piston 6.2, an upper cover body 6.3, a connecting block main body 35.1, a side fixing plate 35.2, a fixing screw hole 35.3, a connecting rod fixing hole 35.4, a through outer hole 35.5 and a through inner hole 35.6.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.