CN111917023A - Pneumatic power-off, power-transmission and dust-removal device for distribution box - Google Patents

Abstract

The invention relates to a pneumatic cut-off and dedusting device for a distribution box. Its technical scheme is: the outer side of the electric key is connected to the electric key control cylinder through the connecting rod, the electric key control cylinder is connected to the control reversing air valve through the closed gas pipeline, and the control reversing air valve is connected to the air through the remote gas transmission line. The compressor air storage tank, and the remote gas transmission pipeline is provided with a cut-off valve, the air compressor air storage tank is connected to the air compressor, and the control reversing air valve is pressed by the air compressor to realize the switch of the electric key; The lower side of the main body of the electric box is provided with a dust removal pipe, and the dust removal pipe is provided with a solenoid valve, which is connected to the air compressor air storage tank. The beneficial effects are as follows: the present invention uses gas as the driving force, which can avoid or reduce the interference of the electromagnetic field to human physiology, and the induction circuit composed of the coil and the rectifier is opened by the dust attracting capacitor, the gas circuit, and the automatic induction and dust removal become possible, avoiding the It avoids the physical harm caused by manual operation of dust removal.

Description

Pneumatic disconnection and dust removal device for distribution box

technical field

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

Background technique

Electricity is the driving force of modern industry. In the process of power transmission, high voltage becomes low voltage is a common situation encountered by the power sector. At present, the operation of changing high voltage into low voltage on the distribution box is mostly manual operation. The process is, a Operation, more than two people to monitor, this is an important safety measure written into the operating procedures, otherwise it is not allowed to operate, so the operation is not only troublesome, but also the operator will be affected by electromagnetic interference and affect people's physical and mental health , therefore, we invented a device for pneumatically disconnecting electricity.

In addition, the wiring box also involves the problem of dust prevention: First, it is to prevent some exposed components in the cabinet from being covered by dust. If it is covered by dust and then absorbs moisture in the air, some exposed components will be corroded. A long time may lead to the reduction of insulation, short circuit, grounding and other faults, and may even lead to the danger of electric shock; 2. Excessive dust coverage will lead to excessive electrostatic current in the case of humid air, which will also cause damage during operation. The danger of electric shock, and the excessive dust coverage will have a corrosive effect on the components of the box, which will greatly shorten the service life of the components. The existing dust-proofing generally adopts electrostatic dusting. Electrostatic precipitator is a dust collection method that uses an electrostatic field to ionize the gas so that the dust particles are charged and adsorbed on the electrode. In the strong electric field, the 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, through technological innovation in recent years, there are also ways of using negative plates to collect dust. In the past, it was often used in coal-fueled factories and power stations to collect coal ash and dust in flue gas. Note: When the power distribution cabinet is energized, the dust removal operation needs to be carried out by a professional electrician.

The Chinese patent document publication number is 109999600A, and the patent name is "a dust removal device for a distribution box", which includes a box body, a support column and a transducer; the box body is provided with a first installation bin and a second installation bin; the second installation A first placement bin and a second placement bin are arranged in the bin; a dust collection box and a first air extraction device are arranged in the second placement bin; A filter bag is arranged in the collection box; the first air extraction device is respectively connected to the first installation bin and the second placement bin; the first placement bin is provided with a second air extraction device and an air dust removal assembly; the air outlet end of the second air extraction device The air inlet ends of the air dedusting components are respectively connected; the air outlet ends of the air dedusting components are respectively connected to the first installation bin; the supporting column is arranged on the box body, and the supporting column is provided with a hollow bin; the hollow bins are all provided with lifting devices; The telescopic ends are respectively connected to the walking wheels. The patented technology uses ultrasonic vibration components to cooperate with air to remove dust. This operation requires the power distribution box to be powered off, instead of being charged for dust removal, which affects the power supply.

The Chinese patent document publication number is 107800045A, and the patent name is "A dust removal device for a distribution box", which includes an insulating frame arranged on the air outlet of the distribution box; a metal mesh that can be shaken and a static electricity connected to the metal mesh are arranged in the insulating frame. generator; the insulating frame has four side walls, and a spring is connected between each side wall and the metal mesh; one side wall of the insulating frame is provided with an electromagnet for adsorbing the metal mesh; the electromagnet Connected to the same electrical circuit as the electrostatic generator. Compared with the prior art, the basic solution has a simple structure and is easy to use. The dust in the distribution box is cleaned through the metal mesh, and the circuit board is not touched during the cleaning process, which can effectively prevent the circuit board from malfunctioning due to manual cleaning. . This solution uses an electrostatic generator, which uses an electrostatic field to ionize the gas so that the dust particles are charged and adsorbed on the electrode.

SUMMARY OF THE INVENTION

The purpose of the present invention is to aim at the above-mentioned defects existing in the prior art, to provide a pneumatic power cut-off and dust removal device for a distribution box. Operators, improve the safety factor; on the other hand, in order to reduce the labor intensity of electricians, and reduce the impact of electromagnetic interference on people's physical and mental health, a dust removal device is added to realize the dust cleaning function.

The present invention provides a pneumatic power-disconnection and dust-removing device for a distribution box. ), control reversing air valve (8), remote air transmission line (9), reversing handle (12), external starting interface (13), air compressor air storage tank (14), air compressor (15) , pressure relay (18), first cut-off valve (19a), second cut-off valve (19b), solenoid valve (20), dust removal pipe (21), power terminal (22), power supply terminal (23), electric key The fixing plate (24), the power contact (25), the fixing bolt (26), the relay (27), the fuse (28), the transformer (29), and the high-voltage household line (2) are connected to the main body of the distribution box (1). ) The power terminal (22) in the inner cavity is fixed on the inner wall of the main body (1) of the distribution box through the key fixing plate (24) and the insulating block (32). The outer side of the power terminal (22) is provided with a power contact At point (25), the lower side of the power terminal (22) is provided with a corresponding power supply terminal (23), the outer side of the power supply terminal (23) is provided with a power supply contact (34), and the power supply terminal (23) is blown by fusing The device (28) is connected to the relay (27) and the transformer (29), the transformer (29) outputs a low-voltage working power supply (5), and a dust removal induction control device is installed on the main body (1) of the distribution box; The point (25) and the power supply contact (34) cooperate with the electric key (3), the outer side of the electric key (3) is connected to the electric key control cylinder (6) through the connecting rod, and the electric key control cylinder (6) is controlled by closing the gas line (10) and connected to the control reversing air valve (8), the control reversing air valve (8) is connected to the air compressor air storage tank (14) through the remote air transmission line (9), and the remote air transmission line (9) is provided with a first cut-off valve (19a) and a second cut-off valve (19b), the air compressor air storage tank (14) is connected to the air compressor (15), and the air compressor (15) controls the The reversing air valve (8) is pressed to realize the switch of the electric key (3). , and is connected to the air compressor air storage tank (14), and under the control of the dust removal induction control device, the air compressor (15) delivers the compressed gas to the main body of the distribution box (1) through the dust removal pipe (21). Dust removal is carried out in the inner cavity of the main body (1) of the distribution box.

Preferably, the above-mentioned electric key (3) comprises an upper contact of the electric key (3.1), a lower contact of the electric key (3.2), a bridge connector (3.3), a switch execution block (3.4), and the bridge connector (3.3) The upper end of the electric key is fixed with the upper contact (3.1), and the lower end is fixed with the lower contact of the electric key (3.2). 3) The connecting block (35) on the outer side is connected and fixed, and the air cylinder (6) is controlled by the electric key to drive the connecting block (35) to move up and down, which drives the bridge connector (3.3) to move up and down, thereby making the contact (3.1) on the electric key. Insert the power contact (25) and the power supply contact (34) with the lower contact of the electric key (3.2) to form a power-on circuit, or remove the power contact (25) and the power supply contact (34) to form a power-off state.

Preferably, the above-mentioned upper contact (3.1) of the electric key is a convex structure, the lower part is a contact increasing surface (3.5), the power contact (25) is in the shape of a groove, and the upper contact (3.1) of the electric key is connected with the power The contacts (25) cooperate with each other to realize; the lower contact (3.2) of the electric key is a convex structure, the lower part is the contact increase surface (3.5), the power supply contact (34) is in the shape of a groove, and the lower contact of the electric key is in the shape of a groove. The point (3.2) cooperates with the power supply contact (34).

Preferably, the above-mentioned electric key control cylinder (6) comprises a cylinder main body (6.1), a lower piston (6.2) and an upper cover body (6.3), a connecting rod is provided in the inner cavity of the cylinder main body (6.1), and the bottom of the connecting rod is provided with a connecting rod. The lower piston (6.2) is sleeved with a power-off safety spring (7) on the outside of the connecting rod. The connecting rod passes upward through the upper cover (6.3) and is connected to the connecting block (35) on the outside of the electric key (3), and is on the cylinder body. Connect the closing gas line (10) at the bottom of (6.1), and connect the disconnecting electrical line (11) at the top of the cylinder body (6.1).

Preferably, the inner cavity of the connecting block (35) is longitudinally provided with multiple sets of side-by-side connecting rod fixing holes, and the outer wall of the connecting block (35) is laterally provided with a plurality of through outer holes; the connecting rod is axially provided with a plurality of holes Through the inner hole, after the connecting rod is inserted into the connecting rod fixing hole, the fixing pin is inserted into the through inner hole along the through outer hole to realize locking.

Preferably, the above-mentioned dust removal induction control device comprises a solenoid valve (20), a needle valve opening coil (20.3), a gas path opening armature (20.4), a gas path opening coil (20.5), a dust attracting capacitor (20.6), a rectifier (20.7) , the input end of the rectifier (20.7) is connected to the low-voltage working power supply (5), and the output end is connected to the air circuit opening coil (20.5), the air circuit opening coil (20.5) is connected to the dust attracting capacitor (20.6), the rectifier ( 20.7), the air circuit opening coil (20.5) and the dust attracting capacitor (20.6) form the air circuit opening circuit; the air circuit opening coil (20.5) is installed on one side of the air circuit opening armature (20.4), and the air circuit opening One end of the opening armature (20.4) is connected to the low-voltage working power supply (5), and the other end is connected to the low-voltage working power supply (5) through the needle valve opening coil (20.3), and one side of the needle valve opening coil (20.3) is provided with a solenoid valve ( 20).

Preferably, the above solenoid 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), and the electromagnetic dust removal valve The inlet end of the valve body (20.1) is connected to the remote gas transmission pipeline (9), and the outlet end is connected to the main body (1) of the distribution box through the dust removal pipe (21); after the electromagnetic dust removal needle valve (20.2) is opened, the remote The compressed gas of the gas transmission line (9) is sprayed into the main body (1) of the distribution box through the dust removal pipe (21) for dust removal.

Preferably, the above-mentioned remote gas transmission line (9) is provided with an external starting interface (13), which is installed between the control reversing gas valve (8) and the first shut-off valve (19a).

Preferably, the above-mentioned external starting interface (13) is connected to a manual gas compression device, and the manual gas compression device includes a gas exchange joint (a), a sealed cylinder liner (b), a sealed piston (c), and a power screw (d) , applying force nut (e), connecting lock cap (f), fixing screw (g), connecting pin (h), locking pin (i), transition nut (j) and hand wheel (k), described in One end of the sealed cylinder liner (b) is flexibly connected to the gas exchange joint (a), and the other end is connected to the force nut (e) through the locking pin (i), and the center of the gas exchange joint (a) is provided with a vent nozzle , and is movably connected with the external starting interface (13); the center of the force nut (e) is provided with a work screw (d), and the outer end of the work screw (d) is provided with a hand wheel (k ), the inner end is connected with the sealing piston (c) through the connecting lock cap (f) and the connecting pin (h), and the power screw (d) is rotated along the force nut (e) by rotating the handwheel (k), Realize the forward and backward movement of the power screw (d), and drive the sealing piston (c) to move forward or backward.

A method of using a pneumatic cut-off and dedusting device for a power distribution box mentioned in the present invention includes the following steps:

1. After the entire equipment is connected, when the high-pressure household line (2) is powered on, close the first shut-off valve (19a) and the second shut-off valve (19b), so that the P→ A is turned on, and the external starting port (13) is activated to inject the gas of the set pressure into the system. At this time, since the P→A of the control reversing gas valve (8) is turned on, the key control cylinder ( Under the action of 6), the connecting block (35) drives the upper contact of the electric key and the lower contact of the electric key to go up, so that the upper contact of the electric key contacts the power contact (25), and the lower contact of the electric key contacts the power supply contact (34), Connect the main line; at this time, the key controls the connecting rod and the lower piston (6.2) in the cylinder (6) to move up, so that the power-off safety spring (7) is in a state of extruding and accumulating energy;

2. When the whole system is in the working state of being turned on, the pressure relay (18) is turned on to make the air compressor (15) work, and the compressed air is stored in the air compressor air storage tank (14). When the value is set, the pressure relay (18) will be disconnected, so that the air compressor (15) will stop working. At this time, the first stop valve (19a) and the second stop valve (19b) can be opened, and the air compressor can store air. The compressed air in the tank (14) is connected to the dust removal pipe (21) and the solenoid valve through the remote gas transmission line (9), and the other way is connected to the control reversing air valve (8) to replace the external starting interface (13). Set the pressure of the gas, so that the whole system is in normal working condition;

3. When the circuit of the distribution box needs to be cut off, the operator manipulates the reversing handle (12) on the control reversing air valve (8), so that the working state of the control reversing air valve (8) is in the P→B conduction state state, the compressed gas in the air storage tank (14) of the air compressor controls the upper part of the cylinder (6) to push the lower piston reversely through the key, and at the same time, under the action of the power-off safety spring (7), the lower piston moves down, The gas is conducted along the A→O of the control reversing gas valve (8), and the gas is exhausted, thereby driving the connecting rod to move down, so that the upper contact of the electric key and the lower contact of the electric key go down, so that the bus line is disconnected;

When it needs to be closed again, operate the reversing handle (12) to make the P→A of the control reversing air valve (8) conduct, and the compressed gas in the air compressor air storage tank (14) controls the cylinder (6) through the electric key. The lower part pushes the lower piston forward, and at the same time squeezes the power-off safety spring (7) to store energy, the connecting rod drives the connecting block (35) upward, so that the upper contact of the electric key contacts the power contact (25), and the lower contact of the electric key touches the power contact (25). point contact with the power supply contact (34), so that the bus line is connected again;

4. When the pressure in the air compressor air storage tank (14) changes, the entire system will maintain the relative pressure balance of the entire system through the opening of the air compressor (15) under the action of the air valve (17);

5. Set the dust attracting capacitor (20.6) on one side of the main body of the distribution box (1), through the rectification effect of the rectifier (20.7), the dust attracting capacitor (20.6) attracts a lot of dust, when the main body of the distribution box attracts a lot of dust (1) When the dust concentration in the surrounding air is high, the gas-electric opening circuit composed of the rectifier (20.7), the gas circuit opening coil (20.5), and the dust attracting capacitor (20.6) will form a passage. The circuit opening coil (20.5) attracts the gas circuit to open the armature (20.4), so that the needle valve opening coil (20.3) generates a magnetic field to attract the electromagnetic dust removal needle valve (20.2) to open, and the dust removal pipe (21) sprays compressed gas into the main body of the distribution box Cavity for dust removal;

When the dust concentration is reduced, the gas-electric opening circuit composed of the rectifier (20.7), the gas circuit opening coil (20.5), and the dust attracting capacitor (20.6) will form an open circuit, and the electromagnetic dust removal needle valve (20.2) will be closed. 21) The compressed gas is disconnected to maintain the working state.

The beneficial effects of the present invention are as follows: the present invention uses gas as the power and uses the mechanical structure to complete the action of manual operation. Since the gas (gas source) can be transported over a long distance, it can avoid or reduce the interference of the electromagnetic field to human physiology, and at the same time , the dust will automatically discharge the high voltage, which will lead to static electricity, fire and other hazards. Therefore, the induction circuit composed of the coil and the rectifier is opened by the dust attracting capacitor, the gas circuit, and the automatic induction and dust removal are possible, avoiding the manual operation of dust removal. bodily harm;

In a word, the operation of the system of the present invention is completely reliable. ①Because it is far away from the high-voltage power supply, it avoids the damage of the electromagnetic field to the operators and guardians; ②The power failure of the system is due to the installation of electric keys to control the cylinder, the power-off safety spring and the control reversing gas. valve, so the whole power-off system is safe; in addition, the system of the present invention can automatically sense and remove dust, which reduces the labor intensity of workers. more reliable and secure.

Description of drawings

Accompanying drawing 1 is the structural representation of the present invention;

Accompanying drawing 2 is the A-A sectional view that the bus line is connected in Fig. 1;

Accompanying drawing 3 is the A-A sectional view that the bus line is disconnected in Fig. 1;

Accompanying drawing 4 is the partial enlarged view of electric key and power contact and power supply contact;

Accompanying drawing 5 is the side view of electric key and power contact and power supply contact;

Accompanying drawing 6 is the top view of electric key and power contact and power supply contact;

Accompanying drawing 7 is the top view of the second embodiment of electric key and power contact and power supply contact;

Accompanying drawing 8 is the top view of connecting block;

Accompanying drawing 9 is the circuit diagram of dust removal induction control device;

Accompanying drawing 10 is the structural representation of gas manual compression device;

Accompanying drawing 11 is the partial enlarged view of electric key control cylinder;

12 is an A-A sectional view of another structure in which the bus line is connected in FIG. 1;

In the above picture: main body of distribution box 1, high-voltage household line 2, electric key 3, working indicator light 4, low-voltage working power supply 5, electric key control cylinder 6, power-off safety spring 7, control reversing gas valve 8, remote gas transmission Pipeline 9, closed gas pipeline 10, disconnected electrical pipeline 11, reversing handle 12, external starting interface 13, air compressor air storage tank 14, air compressor 15, pressure gauge 16, safety valve 17, pressure relay 18, First stop valve 19a, second stop valve 19b, solenoid valve 20, dust removal pipe 21, power terminal 22, power supply terminal 23, key fixing plate 24, power contact 25, fixing bolt 26, relay 27, fuse 28 , transformer 29, power supply transformer 30, working transformer 31, insulating block 32, rubber elastic block 33, power supply contact 34, connection block 35;

Electric key upper contact 3.1, electric key lower contact 3.2, bridge connector 3.3, switch execution block 3.4, contact extension surface 3.5, connecting screw hole 3.6, cylinder main body 6.1, lower piston 6.2 and upper cover body 6.3, connection block Main body 35.1, side fixing plate 35.2, fixing screw hole 35.3, connecting rod fixing hole 35.4, through outer hole 35.5, through inner hole 35.6.

Detailed ways

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

Embodiment 1, with reference to the accompanying drawings 1-3, the present invention refers to a pneumatic disconnection and dedusting device for a distribution box. Electric key control air cylinder 6, control reversing air valve 8, remote air transmission line 9, reversing handle 12, external starting interface 13, air compressor air storage tank 14, air compressor 15, pressure relay 18, first stop valve 19a, second cut-off valve 19b, solenoid valve 20, dust removal pipe 21, power terminal 22, power supply terminal 23, key fixing plate 24, power contact 25, fixing bolt 26, relay 27, fuse 28, transformer 29, The high-voltage household line 2 is connected to the power terminal 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 the insulating block 32. The outside of the power terminal 22 is provided with power Contact 25, the lower side of the power terminal 22 is provided with a corresponding power supply terminal 23, the outer side of the power supply terminal 23 is provided with a power supply contact 34, the power supply terminal 23 is connected to the relay 27 and the transformer 29 through the fuse 28, and the transformer 29 The low-voltage working power supply 5 is output, and the inner cavity of the main body 1 of the distribution box is provided with a dust removal induction control device; the power contact 25 and the power supply contact 34 are matched with the electric key 3, and the outer side of the electric key 3 is provided with a connection block 35, the lower side of the connecting block 35 is connected to the electric key control cylinder 6 through the connecting rod, and the electric key control cylinder 6 is connected to the control reversing air valve 8 by closing the gas line 10 and the control reversing air valve 8 is transmitted through the remote control valve 8. The air line 9 is connected to the air compressor air storage tank 14, and the remote gas transmission line 9 is provided with a first cut-off valve 19a and a second cut-off valve 19b, the air compressor air storage tank 14 is connected to the air compressor 15, through The air compressor 15 presses the control reversing air valve 8 to realize the switch of the electric key 3; the lower side of the distribution box main body 1 is provided with a dust removal pipe 21, and the dust removal pipe 21 is provided with a solenoid valve 20, which is connected to the air compressor Under the control of the dust removal induction control device, the air compressor 15 transports the compressed gas to the main body 1 of the distribution box through the dust removal pipe 21, and dedusts the inner cavity of the main body 1 of the distribution box.

4-6, the electric key 3 of the present invention includes an upper contact of the electric key 3.1, a lower contact of the electric key 3.2, a bridge connector 3.3, and a switch execution block 3.4. The upper end of the bridge connector 3.3 fixes the upper contact of the electric key 3.1, the lower end of the fixed electric key lower contact 3.2, the outer side of the bridge connector 3.3 is provided with a switch execution block 3.4, the switch execution block 3.4 is movably connected and fixed with the connection block 35 on the outer side of the electric key 3, and is driven by the electric key control cylinder 6 The connecting block 35 moves up and down to drive the bridge connector 3.3 to move up and down, so that the upper contact 3.1 of the electric key and the lower contact 3.2 of the electric key are inserted into the power contact 25 and the power supply contact 34 to form a power-on circuit, or the power contact 25 and the power supply are removed. Contacts 34 form a de-energized state.

Among them, the upper contact 3.1 of the electric key is a convex structure, the lower part is the contact increasing surface 3.5, the power contact 25 is in the shape of a groove, and the upper contact 3.1 of the electric key and the power contact 25 cooperate with each other to realize; the The lower contact 3.2 of the electric key is a convex structure, the lower part is the contact increasing surface 3.5, the power supply contact 34 is in the shape of a groove, and the lower contact 3.2 of the electric key and the power supply contact 34 cooperate with each other.

Referring to FIG. 11, the electric key control cylinder 6 of the present invention includes a cylinder main body 6.1, a lower piston 6.2 and an upper cover body 6.3, a connecting rod is arranged in the inner cavity of the cylinder main body 6.1, and a lower piston 6.2 is arranged at the bottom of the connecting rod. The outer side of the rod is sleeved with a power-off safety spring 7. The connecting rod passes upward through the upper cover body 6.3 and is connected to the connection block 35 on the outer side of the key 3, and is connected to the bottom of the cylinder body 6.1. The closed gas line 10 is connected to the top of the cylinder body 6.1. Disconnect electrical line 11.

Referring to FIG. 8 , the connection block 35 of the present invention includes a connection block body 35.1 and a side fixing plate 35.2. The side fixing plate 35.2 is provided with two sets of fixing screw holes 35.3 for connecting with the switch execution block 3.4 outside the electric key. The block main body 35.1 is longitudinally provided with multiple sets of side-by-side connecting rod fixing holes 35.4, and the outer wall of the connecting block 35 is laterally provided with a plurality of through outer holes 35.5; the connecting rod is axially provided with a plurality of through holes 35.6. After the connecting rod is inserted into the fixing hole, locking is achieved by inserting the fixing pin into the through hole 35.6 along the through outer hole 35.5.

Referring to FIG. 9, the dust removal induction control device of the present invention includes a solenoid valve 20, a needle valve opening coil 20.3, a gas path opening armature 20.4, a gas path opening coil 20.5, a dust attracting capacitor 20.6, and a rectifier 20.7. The input end of the rectifier 20.7 Connected to the low-voltage working power supply 5, the output end is connected to the air circuit opening coil 20.5, the air circuit opening coil 20.5 is connected to the dust attracting capacitor 20.6, the dust attracting capacitor 20.6 is placed in the inner cavity of the distribution box, the rectifier 20.7, the air circuit opening coil 20.5 and the dust attracting capacitor 20.6 to form a gas path opening circuit; the gas path opening coil 20.5 is installed on one side of the gas path opening armature 20.4, and one end of the gas path opening armature 20.4 is connected to the low-voltage working power supply 5, and the other end is connected to the low-voltage working power supply 5 through a needle The valve opening coil 20.3 is connected to the low-voltage working power supply 5, and a solenoid valve 20 is provided on one side of the needle valve opening coil 20.3.

Preferably, the above solenoid valve 20 includes 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, and the intake end of the electromagnetic dust removal valve body 20.1 is connected to a remote input The gas outlet is connected to the main body 1 of the distribution box through the dust removal pipe 21; after the electromagnetic dust removal needle valve 20.2 is opened, the compressed gas of the remote gas transmission line 9 is sprayed into the main body 1 of the distribution box through the dust removal pipe 21. Dust off.

Preferably, the above-mentioned remote gas transmission line 9 is provided with an external starting interface 13, which is installed between the control reversing gas valve 8 and the first shut-off valve 19a.

The using method of the present invention is as follows:

1. After the whole equipment is connected, when the high-voltage inlet line 2 is powered on, the first shut-off valve 19a and the second shut-off valve 19b are closed, so that the P→A of the control reversing gas valve 8 is turned on, and the external distribution valve is activated. Start the interface 13 and inject the gas with the set pressure into the system. At this time, since the P→A of the control reversing gas valve 8 is turned on, under the action of the electric key control cylinder 6, the connecting block 35 drives the contact on the electric key. Go up with the lower contact of the electric key, so that the upper contact of the electric key contacts the power contact 25, and the lower contact of the electric key contacts the power supply contact 34, so that the bus line is connected; at this time, the electric key controls the connecting rod and the lower piston in the cylinder 6 6.2 Move up, so that the power-off safety spring 7 is in a state of extruding and accumulating energy;

2. When the whole system is in the working state of being turned on, the pressure relay 18 is turned on to make the air compressor 15 work, and the compressed air is stored in the air compressor air storage tank 14. When the pressure reaches the set value, the pressure relay 18 will be disconnected to stop the air compressor 15 from working. At this time, the first shut-off valve 19a and the second shut-off valve 19b can be opened, and the compressed air in the air compressor air storage tank 14 is connected all the way through the remote gas transmission line 9. To the dust removal pipe 21 and the solenoid valve, the other way is connected to the control reversing gas valve 8 to replace the gas with the set pressure of the external starting interface 13, so that the whole system is in a normal working state;

3. When the circuit of the distribution box needs to be cut off, the operator manipulates the reversing handle 12 on the control reversing air valve 8, so that the working state of the control reversing air valve 8 is in the P→B conduction state, and the air compressor stores The compressed gas in the gas tank 14 pushes the lower piston reversely through the upper part of the electric key control cylinder 6, and at the same time, under the action of the power-off safety spring 7, the lower piston moves down, and the gas in the lower piston passes along the control reversing valve 8. A→O is turned on and the gas is exhausted, thereby driving the connecting rod to move down, so that the upper contact of the electric key and the lower contact of the electric key go down, so that the bus line is disconnected;

When it is necessary to close the switch again, operate the reversing handle 12 to make the P→A of the control reversing air valve 8 conduct, and the compressed gas in the air compressor air storage tank 14 controls the lower part of the air cylinder 6 to push the lower piston through the electric key. At the same time, the power-off safety spring 7 is squeezed to store energy, and the connecting rod drives the connecting block 35 upward, so that the upper contact of the electric key contacts the power contact 25, and the lower contact of the electric key contacts the power supply contact 34, so that the bus line is connected again. ;

4. When the pressure in the air compressor air storage tank 14 changes, the entire system will maintain the relative pressure balance of the entire system through the opening of the air compressor 15 under the action of the air valve 17;

5. Set the dust attracting capacitor 20.6 in the inner cavity of the main body 1 of the distribution box, through the rectification effect of the rectifier 20.7, the dust attracting capacitor 20.6 attracts a large amount of dust. When the dust in the air in the inner cavity of the main body 1 of the distribution box is When the concentration is high, the gas-electric opening circuit composed of the rectifier 20.7, the gas circuit opening coil 20.5, and the dust attracting capacitor 20.6 will form a passage. The coil 20.3 generates a magnetic field to attract the electromagnetic dust removal needle valve 20.2 to open, and the dust removal pipe 21 sprays the compressed gas into the inner cavity of the main body of the distribution box for dust removal;

When the dust concentration is reduced, the gas-electric opening circuit composed of the rectifier 20.7, the gas circuit opening coil 20.5, and the dust attracting capacitor 20.6 will form an open circuit, and the electromagnetic dust removal needle valve 20.2 will be closed, so that the compressed gas of the dust removal pipe 21 is disconnected and the operation is maintained. state.

Embodiment 2, another situation that the present invention encounters is:

Referring to FIG. 10, when the air compressor air storage tank 14 or the air compressor 15 fails, the manual gas compression device can be connected through the external starting interface 13, and the manual gas compression device includes a gas exchange joint a, a sealed cylinder liner b , sealing piston c, working screw d, force nut e, connecting lock cap f, fixing screw g, connecting pin h, locking pin i, transition nut j and hand wheel k, the sealing cylinder liner b One end is movably connected to the gas exchange joint a, the other end is connected to the force nut e through the locking pin i, the center of the gas exchange joint a is provided with a vent nozzle, and is movably connected with the external start interface 13; the force application The center of the nut e is provided with a working lead screw d, the outer end of the working lead screw d is provided with a hand wheel k, and the inner end is connected with the sealing piston c through the connecting lock cap f and the connecting pin h, and is driven by rotating the hand wheel k. The power screw d rotates along the force nut e to realize the front and rear movement of the power screw d, and drives the sealing piston c to advance or retreat. The external start port 13 enters the control reversing gas valve 8. When the sealing piston c retreats, the one-way valve located at the gas exchange joint a is opened, and the external gas enters the sealing piston c to realize the replenishment of gas. Connection or disconnection of the line.

Embodiment 3, the difference between the present invention and embodiment 1 is:

There is a switch execution block 3.4 on the outside of the bridge connector 3.3 on the side of the electric key. The switch execution block 3.4 is directly connected and fixed with the connecting rod of the electric key control cylinder 6. The electric key control cylinder 6 drives the connecting block 35 to move up and down, and drives the bridge connection body. 3.3 Move up and down, so that the upper contact 3.1 of the electric key and the lower contact 3.2 of the electric key are inserted into the power contact 25 and the power supply contact 34 to form a power-on circuit, or the power contact 25 and the power supply contact 34 are removed to form a power-off state.

The switch execution block 3.4 here is provided with a plurality of connection screw holes 3.6, so that the electric key control cylinder 6 can be installed according to the position of the distribution box, and directly connected to the corresponding connection screw holes 3.6 according to the position, so there is no need to install the connection block 35 .

Embodiment 4, the difference between the present invention and Embodiment 1 is: referring to FIG. 12 , the connecting block 35 is provided with multiple sets of screw holes, and the connecting rod and the connecting block are fixed by threaded connection, so that there is no need to open a through hole on the connecting rod. There is no need to open a through hole in the horizontal direction of the connecting block 35, which makes the manufacture more convenient and the use more reliable.

Embodiment 5, the difference between the present invention and embodiment 1 is:

The dust attracting capacitor 20.6 is arranged on one side of the main body of the distribution box 1, and through the rectification effect of the rectifier 20.7, the dust attracting capacitor 20.6 attracts a large amount of dust. When the dust concentration in the air around the main body 1 of the distribution box is high When the rectifier 20.7, the gas circuit opening coil 20.5, and the dust attracting capacitor 20.6 are formed, the gas-electric opening circuit will form a passageway. The magnetic field attracts the electromagnetic dust removal needle valve 20.2 to open, and the dust removal pipe 21 sprays the compressed gas into the inner cavity of the main body of the distribution box for dust removal;

When the dust concentration is reduced, the gas-electric open circuit composed of the rectifier 20.7, the gas circuit open coil 20.5, and the dust attracting capacitor 20.6 will form an open circuit, and the electromagnetic dust removal needle valve 20.2 will be closed, so that the compressed gas of the dust removal pipe 21 is disconnected, and the dust removal is completed. , and then continue to maintain the monitoring state. Although the solution is to place the dust attracting capacitor 20.6 outside the distribution box, it can also realize the dust removal control of the distribution box and reduce the damage of a large amount of dust to the electronic components in the distribution box.

The above are only some preferred embodiments of the present invention, and any person skilled in the art may use the technical solutions described above to modify or modify them into equivalent technical solutions. Therefore, any simple modifications or equivalent replacements made according to the technical solutions of the present invention fall within the protection scope of the present invention.

Claims (5)

1. A pneumatic power cut-off and dust removal device for a distribution box, characterized in that it comprises a distribution box main body (1), a high-voltage household line (2), an electric key (3), an electric key control cylinder (6), a control switch To the air valve (8), the remote air pipeline (9), the reversing handle (12), the external starting interface (13), the air compressor air storage tank (14), the air compressor (15), the pressure relay ( 18), the first stop valve (19a), the second stop valve (19b), the solenoid valve (20), the dust removal pipe (21), the power terminal (22), the power supply terminal (23), the electric key fixing plate (24) ), power contacts (25), fixing bolts (26), relays (27), fuses (28), transformers (29), and the high-voltage household line (2) is connected to the inner cavity of the main body of the distribution box (1). The power terminal (22) is fixed on the inner wall of the main body (1) of the power distribution box through the electric key fixing plate (24) and the insulating block (32), and a power contact (25) is provided on the outside of the power terminal (22). , the lower side of the power terminal (22) is provided with a corresponding power supply terminal (23), the outer side of the power supply terminal (23) is provided with a power supply contact (34), and the power supply terminal (23) passes through the fuse (28) A relay (27) and a transformer (29) are connected, the transformer (29) outputs a low-voltage working power supply (5), and a dust-removing induction control device is installed on the main body (1) of the distribution box; the power contact (25) And the power supply contact (34) is matched with the electric key (3), the outer side of the electric key (3) is connected to the electric key control cylinder (6) through the connecting rod, and the electric key control cylinder (6) is closed by closing the gas line (10) and Connected to the control reversing air valve (8), the control reversing air valve (8) is connected to the air compressor air storage tank (14) through the remote air transmission line (9), and the remote air transmission line (9) A first cut-off valve (19a) and a second cut-off valve (19b) are provided, the air compressor air storage tank (14) is connected to the air compressor (15), and the reversing air valve is controlled by the air compressor (15). (8) Pressing to realize the switch of the electric key (3); a dust removal pipe (21) is provided on the lower side of the main body of the distribution box (1), and a solenoid valve (20) is provided on the dust removal pipe (21), and is connected to The air compressor air storage tank (14), and under the control of the dust removal induction control device, the air compressor (15) delivers the compressed gas to the distribution box main body (1) through the dust removal pipe (21). (1) Dust removal in the inner cavity; The electric key (3) includes an upper contact of the electric key (3.1), a lower contact of the electric key (3.2), a bridge-type connector (3.3), and a switch execution block (3.4). The upper end of the bridge-type connector (3.3) The upper contact of the electric key (3.1) is fixed, the lower end of the electric key is fixed to the lower contact (3.2), the outer side of the bridge connector (3.3) is provided with a switch execution block (3.4), the switch execution block (3.4) and the electric key (3) The connecting block (35) on the outer side of the electric key is connected and fixed, and the air cylinder (6) is controlled by the electric key to drive the connecting block (35) to move up and down, which drives the bridge connector (3.3) to move up and down, so that the upper contact (3.1) of the electric key and the electric key are moved up and down. The lower contact (3.2) is inserted into the power contact (25) and the power supply contact (34) to form a power-on circuit, or is moved out of the power contact (25) and the power supply contact (34) to form a power-off state; The dust removal induction control device includes a solenoid valve (20), a needle valve opening coil (20.3), a gas path opening armature (20.4), a gas path opening coil (20.5), a dust attracting capacitor (20.6), and a rectifier (20.7), so the The input end of the rectifier (20.7) is connected to the low-voltage working power supply (5), and the output end is connected to the air circuit opening coil (20.5), and the air circuit opening coil (20.5) is connected to the dust attracting capacitor (20.6), the rectifier (20.7) , the gas path opening coil (20.5) and the dust attracting capacitor (20.6) form a gas path opening circuit; the gas path opening coil (20.5) is installed on one side of the gas path opening armature (20.4), and the gas path opening armature One end of (20.4) is connected to the low-voltage working power supply (5), and the other end is connected to the low-voltage working power supply (5) through the needle valve opening coil (20.3), and one side of the needle valve opening coil (20.3) is provided with a solenoid valve (20) . 2. The pneumatic cut-off and dedusting device for power distribution box according to claim 1, characterized in that: the electromagnetic valve (20) comprises an electromagnetic dedusting valve body (20.1) and an electromagnetic dedusting needle valve (20.2), and the electromagnetic dedusting The needle valve (20.2) is installed in the inner cavity of the electromagnetic dust removal valve body (20.1), and the inlet end of the electromagnetic dust removal valve body (20.1) is connected to the remote gas transmission pipeline (9), and the air outlet end is connected to the dust removal pipe (21) to the Inside the main body (1) of the distribution box; after the electromagnetic dust removal needle valve (20.2) is opened, the compressed gas of the remote gas transmission line (9) is sprayed into the main body (1) of the distribution box through the dust removal pipe (21) for dust removal. 3. The pneumatic power-disconnection and dust-removing device for a distribution box according to claim 1, characterized in that: the remote gas transmission line (9) is provided with an external starting interface (13), and is installed in the control reversing Between the air valve (8) and the first shut-off valve (19a). 4. The pneumatic power-disconnection and dust-removing device for a distribution box according to claim 3, characterized in that: the external starting interface (13) is connected to a manual gas compression device, and the manual gas compression device comprises a gas exchange joint ( a), sealed cylinder liner (b), sealed piston (c), working screw (d), force nut (e), connecting lock cap (f), fixing screw (g), connecting pin (h), Anti-loosening pin (i), transition nut (j) and hand wheel (k), one end of the sealed cylinder liner (b) is flexibly connected to the gas exchange joint (a), and the other end is connected by the anti-loosening pin (i). The force nut (e), the center of the gas exchange joint (a) is provided with a vent nozzle, and is movably connected with the external starting interface (13); the center of the force nut (e) is provided with a work wire Rod (d), the outer end of the power screw (d) is provided with a hand wheel (k), and the inner end is connected with the sealing piston (c) through the connecting lock cap (f) and the connecting pin (h), and by rotating the hand The wheel (k) drives the power screw (d) to rotate along the force-applying nut (e) to realize the forward and backward movement of the power screw (d), and drives the sealing piston (c) to advance or retreat. 5. The pneumatic disconnection and dedusting device for power distribution box according to claim 1, characterized in that: the upper contact (3.1) of the electric key is a convex-shaped structure, and the lower part is a contact increasing surface (3.5), The power contact (25) is in the shape of a groove, and the upper contact (3.1) of the electric key and the power contact (25) cooperate with each other to realize; the lower contact (3.2) of the electric key is a convex structure, and the lower part is a contact The point-increasing contact surface (3.5), the power supply contact (34) is in the shape of a groove, and the lower contact (3.2) of the electric key and the power supply contact (34) cooperate with each other.

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