CN112614729B

CN112614729B - Quick-tripping high-voltage circuit breaker for automatic fluid supplement of fire early warning system

Info

Publication number: CN112614729B
Application number: CN202110023072.8A
Authority: CN
Inventors: 吴旭; 李朱锋; 倪树新; 张爱国; 谢新甜; 施天驰; 严桂凤
Original assignee: Nantong Haochuang Intelligent Technology Co ltd; Nantong Institute of Technology
Current assignee: Nantong Haochuang Intelligent Technology Co ltd; Nantong Institute of Technology
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2022-03-08
Anticipated expiration: 2041-01-08
Also published as: CN112614729A

Abstract

The invention discloses a fast tripping high-voltage circuit breaker of a fire early warning system for automatically supplementing fluid, which relates to the field of high-voltage electric transmission, and comprises a cable, an arc extinguish chamber, a metal connecting cylinder, a hollow insulating column and a grounding outer box which are fixedly connected from top to bottom, wherein the cable penetrates through the arc extinguish chamber from left to right, the arc extinguish chamber is filled with high-voltage fluid and is provided with an interruption component, a fixed contact and a bridging contact, the fixed contact is arranged on the cable, and the bridging contact is bridged between the two fixed contacts.

Description

Quick-tripping high-voltage circuit breaker for automatic fluid supplement of fire early warning system

Technical Field

The invention relates to the field of high-voltage power transmission, in particular to a quick-tripping high-voltage circuit breaker for automatically supplementing fluid for a fire early warning system.

Background

High-voltage power transmission cables are generally arranged at high places, disconnection is inconvenient, high-voltage circuit breakers are dangerous, and workers cannot directly touch the high-voltage power transmission cables for operation. Therefore, the opening and closing operation of the circuit breaker is generally performed from a remote place by a link transmission mechanism.

And the link transmission mechanism can generate certain blocking force when the high-voltage circuit breaker trips, so that the tripping of the high-voltage circuit breaker is delayed.

Disclosure of Invention

The invention aims to provide a quick-tripping high-voltage circuit breaker of a fire early warning system for automatically supplementing fluid, which does not need to actuate most of linkage devices when tripping, only needs the uppermost part of the linkage devices, namely a connecting piston and a three-way valve actuating rod, to smoothly trip and trip, and can keep other parts static during the interval and even move in the opposite direction without preventing the high-speed tripping, and the reaction is quick and sensitive.

And after tripping and tripping, the fluid pressure operator can automatically control the automatic adjustment state of the whole linkage device, so that the high-voltage circuit breaker can be automatically switched on by simple operation after obstacles are eliminated conveniently.

When the circuit breaker is tripped each time, a small amount of high-pressure fluid can be lost in the arc extinguish chamber and the high-pressure chamber, and the high-pressure fluid can be automatically supplemented by arranging the high-pressure fluid supplement pipe and the fluid automatic valve, so that the air pressure in the arc extinguish chamber and the high-pressure chamber is always kept in a rated range.

The present device therefore eliminates the need for most of the mass of the linkage mechanism when tripped and eliminates the need to transmit stress waves over long distances between the opposite ends of the linkage to effect tripping, reduces reaction time, increases trip speed, and can automatically replenish after fluid loss.

A high-voltage circuit breaker capable of achieving rapid tripping and automatically supplementing fluid for a fire early warning system comprises a cable, an arc extinguish chamber, a metal connecting cylinder, a hollow insulating column and a grounding outer box, wherein the arc extinguish chamber, the metal connecting cylinder, the hollow insulating column and the grounding outer box are fixedly connected in sequence from top to bottom;

the interruption assembly comprises a fluid motor, a motor connecting pipe, a three-way valve and an outer exhaust pipe, the fluid motor comprises a motor cylinder body and a motor piston which is connected in the motor cylinder body in a sliding mode, the bottom of the motor piston is further connected with the motor cylinder body through a motor spring, the motor piston is fixedly connected with a bridging contact through a piston rod, the upper space of the upper portion of the motor piston in the motor cylinder body is connected with the three-way valve through the motor connecting pipe, the lower portion of the motor cylinder body is communicated with the atmosphere through a motor exhaust pipe, one of the other two openings of the three-way valve is directly communicated with the interior of the arc extinguishing chamber, and the other opening of the three-way valve is communicated with the atmosphere through the outer exhaust pipe;

the metal connecting cylinder is internally provided with a releasable coupler which is connected with a three-way valve actuating rod for switching the three-way valve, the releasable coupler is also connected with a fluid pressure operator through a connecting rod device, the connecting rod device is positioned in the hollow insulating column, and the fluid pressure operator is arranged in the grounding outer box.

Preferably, the fluid pressure operator includes a cylinder, an automatic valve, a compressed air supply pipe, a solenoid, a closing control latch, and a lost motion coupler, a cylinder piston is slidably connected in the cylinder, a cylinder portion on a left side of the cylinder piston is directly communicated with the atmosphere, a cylinder right space on a right side of the cylinder piston is connected with the automatic valve through a cylinder intake pipe, and the compressed air supply pipe is also connected with the automatic valve.

Preferably, the automatic valve is fixedly connected to the rotary disc, a connecting piece is fixedly connected to the outer ring of the rotary disc, the left side and the right side of the connecting piece are respectively connected with the tension spring and the solenoid, a sliding switch and a starting switch which are connected in parallel are further arranged between a positive terminal and a negative terminal of the solenoid, the solenoid is matched with a closing control latch, the closing control latch is connected with the inner wall of the grounding outer box through the control latch spring, a control latch coil is arranged on the closing control latch, and the control latch coil is connected with a closing control circuit.

Preferably, the connecting rod device comprises a first horizontal rod, a second horizontal rod, an idle rotation connector, a crank and an operating rod, wherein the crank is rotatably connected to the inner wall of the grounding outer box through a fixed pivot, the lower arm end and the upper arm end of the crank are respectively rotatably connected with the second horizontal rod and the operating rod, the second horizontal rod is connected with the first horizontal rod through the idle rotation connector, the idle rotation connector further comprises a retainer and a connecting piston which is slidably connected in the retainer, a connecting compression spring is connected between the right side wall of the connecting piston and the retainer, the second horizontal rod is fixedly connected with the connecting piston, the first horizontal rod is fixedly connected with the retainer, and a protrusion is arranged on the second horizontal rod.

Preferably, the releasable coupler includes a movable cylinder, a connecting piston, a piston latch, and a tubular guide member, the connecting piston is slidably connected in the movable cylinder, and the connecting piston is fixedly connected to an actuating rod of a three-way valve, the movable cylinder is slidably connected in the tubular guide member, and a lower end wall of the movable cylinder is connected to the operating rod, the piston latch is fixedly connected to the movable cylinder and used for latching the connecting piston, a stopper for preventing the connecting piston from being detached is provided in the movable cylinder, the high-pressure fluid replenishing pipe is communicated with a lower space of the tubular guide member, and a fluid automatic valve is provided on the high-pressure fluid replenishing pipe, a pull-back spring and a valve core are provided in the fluid automatic valve, the valve core is slidably connected in the fluid automatic valve, and a lower end of the valve core is connected to the fluid automatic valve through the pull-back spring, and a fluid through hole is provided on an inclined side wall of the valve core.

Preferably, the piston latch comprises a latch insertion rod, a latch shell and a metal disc, the latch insertion rod penetrates through the latch shell and is in sliding connection with the latch shell, the right end of the latch insertion rod is fixedly connected with the metal disc, an insertion rod shoulder is arranged on the latch insertion rod, an insertion rod spring is sleeved on the latch insertion rod between the right side wall of the insertion rod shoulder and the latch shell, a piston latch coil is further arranged on the latch shell, and a latch insertion hole matched with the latch insertion rod is formed in the connecting piston.

Preferably, be equipped with sealed high-pressure chamber in the metal connecting cylinder, be full of in the high-pressure chamber with the arc extinguishing chamber in the same high-pressure fluid, the coupler of can releasing is located high-pressure chamber, the latter half of tubulose guide passes through guide through-hole and high-pressure chamber intercommunication, the first half of tubulose guide is equipped with ordinary pressure chamber, ordinary pressure chamber is through outer pipeline and atmosphere intercommunication, the space of connecting the piston below in the activity jar is activity jar ordinary pressure space, activity jar ordinary pressure space and ordinary pressure chamber intercommunication, the junction of tubulose guide and activity jar is equipped with ordinary pressure chamber ring seal spare, the junction of connecting piston and activity jar is equipped with ordinary pressure space ring seal spare.

Preferably, both ends fixedly connected with left terminal bush and right terminal bush about the explosion chamber, the cable pass left terminal bush and right terminal bush and with the two fixed connection, the action bars adopts insulating material to make.

Preferably, an actuating rod shoulder is arranged on the three-way valve actuating rod, the actuating rod shoulder is arranged in the arc extinguishing chamber, and an actuating rod spring is further connected between the actuating rod shoulder and a bottom plate of the arc extinguishing chamber.

Preferably, a control circuit switch is arranged on the closed control circuit.

The invention has the advantages that: when tripping, most of the linkage devices do not need to be actuated, only the uppermost part of the linkage devices, namely the connecting piston and the three-way valve actuating rod, is needed, the tripping can be smoothly tripped, and other parts can be kept static during the interval and even move in the opposite direction, so that the high-speed tripping is not prevented, and the response is quick and sensitive.

Through simple switch circuit control, adopt mechanical system transmission, can the remote control circuit breaker break-make, not only convenient operation is simple, and is reliable and stable moreover.

Drawings

FIG. 1 is a schematic view of the external appearance of the apparatus of the present invention;

FIG. 2 is a schematic diagram of the structural state of the breaker of the device of the present invention during closing;

FIG. 3 is a schematic structural state diagram of the initial stage of the circuit breaker trip of the device of the present invention;

fig. 4 is a schematic structural state diagram of a trip stabilization phase of the circuit breaker of the device;

FIG. 5 is a schematic view of the automatic valve closing fluid flow of the apparatus of the present invention;

FIG. 6 is a schematic view of the open position of the automatic fluid valve of the apparatus of the present invention;

12, an arc extinguishing chamber, 13, a left terminal bushing, 14, a right terminal bushing, 15, a cable, 16, an interruption component, 17, a fixed contact, 18, a bridging contact, 20, a fluid motor, 21, a motor cylinder, 22, a motor piston, 23, a motor exhaust pipe, 24, a piston rod, 25, a motor spring, 26, a cylinder upper space, 27, a three-way valve, 28, a motor connecting pipe, 29, an outer exhaust pipe, 30, a hollow insulating column, 32, a fluid pressure operator, 33, a grounding outer box, 35, a link device, 36, an operating rod, 37, a fluid automatic valve, 38, a high-pressure fluid supplementing pipe, 40, a cylinder, 41, a cylinder piston, 43, a cylinder right space, 45, an automatic valve, 47, a compressed air supply pipe, 48, a cylinder, 49, a rotary disc, 49a, a tension spring, 50, a solenoid, 52, a positive terminal, 53, a negative terminal, 55. a slide switch 57, a closing control latch 57, a control latch 57a, a control latch spring 58, a start switch 59, a control latch coil 59a, a closing control circuit 59b, a control circuit switch 60, a first horizontal rod 61, a second horizontal rod 62, a lost motion coupler 63, a holder 64, a coupling piston 65, a coupling compression spring 67, a left end wall 70, a crank 71, a fixed pivot 72, a lower arm end 74, an upper arm end 75, a release coupler 76, a three-way valve actuating lever 80, a movable cylinder 81, a lower end wall 83, a connecting piston 85, a piston latch 86, a latch insertion hole 87, a latch housing 88, a high pressure chamber 89, a stopper 90, a metal connecting cylinder 92, a tubular guide 94, a normal pressure chamber 95, an external connection pipe 96, a movable cylinder normal pressure space 97, a guide through hole, 98. atmospheric cavity ring seal 99, atmospheric space ring seal 100, actuator rod spring 102, actuator rod shoulder 104, boss 110, plunger spring 112, plunger shoulder 113, latch plunger 114, piston latch coil 116, metal disk 121, pullback spring 122, valve spool 123, fluid through hole.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 6, a fast-tripping high-voltage circuit breaker for automatically supplementing fluid for a fire early warning system comprises a cable 15, and further comprises an arc extinguish chamber 12, a metal connecting cylinder 90, a hollow insulating column 30 and a grounding outer box 33 which are fixedly connected from top to bottom, wherein the cable 15 passes through the arc extinguish chamber 12 from left to right, the arc extinguish chamber 12 is filled with high-voltage fluid, and is provided with an interruption assembly 16, a fixed contact 17 and a bridging contact 18, the fixed contact 17 is arranged on the cable 15, and the bridging contact 18 is bridged between the two fixed contacts 17; the high pressure fluid can also play a role in arc extinction in addition to providing high air pressure.

The interrupting assembly 16 comprises a fluid motor 20, a motor connecting pipe 28, a three-way valve 27 and an outer exhaust pipe 29, wherein the fluid motor 20 comprises a motor cylinder 21 and a motor piston 22 slidably connected in the motor cylinder 21, the bottom of the motor piston 22 is also connected with the motor cylinder 21 through a motor spring 25, the motor piston 22 is fixedly connected with the bridging contact 18 through a piston rod 24, an upper cylinder space 26 at the upper part of the motor piston 22 in the motor cylinder 21 is connected with the three-way valve 27 through the motor connecting pipe 28, the lower part of the motor cylinder 21 is communicated with the atmosphere through a motor exhaust pipe 23, one of the other two ports of the three-way valve 27 is directly communicated with the inside of the arc extinguish chamber 12, and the other port of the three-way valve 27 is communicated with the atmosphere through the outer exhaust pipe 29;

a releasable coupling 75 is provided in the metallic connector cylinder 90, the releasable coupling 75 being connected to a three-way valve actuating lever 76 for switching the three-way valve 27, and the releasable coupling 75 being further connected to a fluid pressure operator 32 through a linkage 35, the linkage 35 being located within the hollow insulating cylinder 30, the fluid pressure operator 32 being provided within the grounded outer box 33.

The fluid pressure operator 32 includes a cylinder 40 to which a cylinder piston 41 is slidably connected in the cylinder 40, an automatic valve 45, a compressed air supply pipe 47, a solenoid 50, a close control latch 57, and a lost motion coupling 62, the cylinder 40 on the left side of the cylinder piston 41 being directly communicated with the atmosphere, a cylinder right space 43 on the right side of the cylinder piston 41 being connected to the automatic valve 45 through a cylinder intake pipe 48, and the compressed air supply pipe 47 also being connected to the automatic valve 45.

The automatic valve 45 is fixedly connected to the rotary disc 49, a connecting piece is fixedly connected to the outer ring of the rotary disc 49, the left side and the right side of the connecting piece are respectively connected with the tension spring 49a and the solenoid 50, a sliding switch 55 and a starting switch 58 which are connected in parallel are further arranged between a positive terminal 52 and a negative terminal 53 of the solenoid 50, the solenoid 50 is provided with a closing control latch 57 in a matching way, the closing control latch 57 is connected with the inner wall of the grounding outer box 33 through a control latch spring 57a, a control latch coil 59 is arranged on the closing control latch 57, and the control latch coil 59 is connected with a closing control circuit 59 a.

The connecting rod device 35 comprises a first horizontal rod 60, a second horizontal rod 61, an idle rotation coupler 62, a crank 70 and an operating rod 36, wherein the crank 70 is rotatably connected to the inner wall of the grounding outer box 33 through a fixed pivot 71, a lower arm end 72 and an upper arm end 74 of the crank 70 are respectively rotatably connected with the second horizontal rod 61 and the operating rod 36, the second horizontal rod 61 is connected with the first horizontal rod 60 through the idle rotation coupler 62, the idle rotation coupler 62 further comprises a holder 63 and a coupling piston 64 slidably connected in the holder 63, a coupling compression spring 65 is connected between the right side wall of the coupling piston 64 and the holder 63, the second horizontal rod 61 is fixedly connected with the coupling piston 64, the first horizontal rod 60 is fixedly connected with the holder 63, and a protrusion 104 is arranged on the second horizontal rod 61.

The releasable coupling 75 includes a movable cylinder 80, a connecting piston 83, a piston latch 85, and a tubular guide 92, the connecting piston 83 is slidably connected in the movable cylinder 80, and the connecting piston 83 is fixedly connected to the three-way valve actuating lever 76, the movable cylinder 80 is slidably connected in the tubular guide 92, and the lower end wall 81 of the movable cylinder 80 is connected to the operating lever 36, the piston latch 85 is fixedly connected to the movable cylinder 80 and locks the connecting piston 83, a stopper 89 for preventing the connecting piston 83 from being disengaged is provided in the movable cylinder 80, the high-pressure fluid replenishing pipe 38 is communicated with a space below the tubular guide 92, and the high-pressure fluid replenishing pipe 38 is provided with a fluid automatic valve 37, a pull-back spring 121 and a spool 122 are provided in the fluid automatic valve 37, the spool 122 is slidably connected in the fluid automatic valve 37, and the lower end thereof is connected to the fluid automatic valve 37 through the pull-back spring 121, the inclined side wall of the valve core 122 is provided with a fluid through hole 123.

The plunger latch 85 comprises a latch insertion rod 113, a latch housing 87 and a metal disc 116, the latch insertion rod 113 penetrates through the latch housing 87 and is in sliding connection with the latch housing 87, the right end of the latch insertion rod 113 is fixedly connected with the metal disc 116, an insertion rod shoulder 112 is arranged on the latch insertion rod 113, an insertion rod spring 110 is sleeved on the latch insertion rod 113 between the right side wall of the insertion rod shoulder 112 and the latch housing 87, a plunger latch coil 114 is further arranged on the latch housing 87, and a latch insertion hole 86 matched with the latch insertion rod 113 is arranged on the connecting plunger 83.

Be equipped with sealed high-pressure chamber 88 in the metallic connector cylinder 90, be full of in the high-pressure chamber 88 with explosion chamber 12 the same high-pressure fluid, coupler 75 can release is located high-pressure chamber 88, the latter half of tubulose guide 92 passes through guide through-hole 97 and high-pressure chamber 88 intercommunication, the first half of tubulose guide 92 is equipped with ordinary pressure chamber 94, ordinary pressure chamber 94 is through outer connecting tube 95 and atmosphere intercommunication, the space of connecting piston 83 below in the activity jar 80 is activity jar ordinary pressure space 96, activity jar ordinary pressure space 96 and ordinary pressure chamber 94 intercommunication, tubulose guide 92 is equipped with ordinary pressure chamber ring seal 98 with the junction of activity jar 80, the junction of connecting piston 83 and activity jar 80 is equipped with ordinary pressure space ring seal 99.

Both ends fixedly connected with left terminal bush 13 and right terminal bush 14 about explosion chamber 12, cable 15 passes left terminal bush 13 and right terminal bush 14 and with the two fixed connection, action bars 36 adopts insulating material to make.

The three-way valve actuating lever 76 is provided with an actuating lever shoulder 102, the actuating lever shoulder 102 being provided in the arc chute 12, and an actuating lever spring 100 being connected between the actuating lever shoulder 102 and the bottom plate of the arc chute 12.

The closing control circuit 59a is provided with a control circuit switch 59 b.

The specific implementation mode and principle are as follows:

as shown in fig. 2, in a normal operating state, when the high-voltage circuit breaker needs to be tripped due to a fault, the instantaneous current of the piston latch coil 114 is increased, the acting force of a large magnetic field on the metal plate 116 is increased instantaneously, and the acting force is greater than the elastic force of the plunger spring 110, so that the metal plate 116 drives the latch plunger 113 to move rightwards, and the latch plunger 113 is disengaged from the connecting piston 83;

since the space above the connecting piston 83 is open to the high pressure chamber 88 and the atmospheric space 96 of the movable cylinder below the connecting piston 83 is open to the atmosphere, the connecting piston 83 will move rapidly downward and the movable cylinder 80 will move upward a small distance under the influence of the atmospheric pressure. The connecting piston 83 moves downward, that is, carries the three-way valve actuating lever 76 downward. Accordingly, the three-way valve 27 is switched, the motor connecting pipe 28 is directly connected to the arc-extinguishing chamber 12, and the high-pressure fluid in the arc-extinguishing chamber 12 enters the upper space 26 of the motor cylinder 21 through the motor connecting pipe 28, and the motor piston 22 slides downward by the pneumatic pressure because the space of the motor cylinder 21 below the motor piston 22 is directly connected to the atmosphere. The motor piston 22 slides downwards, namely the piston rod 24 carries the bridging contact 18 to slide downwards, so that the bridging contact 18 is separated from the fixed contact 17, and quick automatic tripping is realized.

During this time, other parts will remain stationary and even some parts will move a small distance in the opposite direction without preventing such high speed tripping. The specific action process is as follows:

as shown in fig. 3, when the connecting piston 83 moves downward rapidly and the movable cylinder 80 moves upward a small distance, the movable cylinder 80 moves upward, the second horizontal rod 61 moves rightward a small distance by the operation rod 36 and the crank 70, and the protrusion 104 on the second horizontal rod 61 moves rightward and pushes up the slide switch 55, so that the conduction between the positive terminal 52 and the negative terminal 53 is realized, and the solenoid 50 is energized. The solenoid 50, which is energized, moves rightward, bringing about the clockwise rotation of the rotary disk 49, and the automatic valve 45 rotates clockwise to communicate the compressed air supply pipe 47 with the cylinder air intake pipe 48. In the process, the second horizontal rod 61 moves to the right, and does not carry the first horizontal rod 60 with it, because the coupling piston 64 in the lost motion coupling 62 has a certain stroke.

After the trip is completed, the entire linkage requires the re-establishment of the linkage relationship piston latch 85 to re-latch the connecting piston 83, thereby facilitating the subsequent remote switching of the circuit breaker by the fluid pressure operator 32 through the linkage 35. The specific action process is as follows:

as shown in fig. 4, after the compressed air supply pipe 47 and the cylinder air inlet pipe 48 are communicated, the compressed air supply pipe 47 delivers high-pressure air into the cylinder right space 43 in the cylinder 40, and drives the cylinder piston 41 to move left, the cylinder piston 41 moves left and drives the operating rod 36 to move downwards through the first horizontal rod 60, the idle joint 62, the second horizontal rod 61 and the crank 70, and the operating rod 36 moves downwards to drag the movable cylinder 80 to move downwards (it should be specifically mentioned that, in the case of tripping, the connecting piston 83 only moves downwards by a predetermined distance and then keeps stable). This distance is controlled by actuator lever shoulder 102, because of actuator lever shoulder 102 and actuator lever spring 100, three-way valve actuator lever 76 is jammed after moving down a certain distance, movable cylinder 80 moves down with piston latch 85 thereon until, after the circuit breaker trip is completed, piston latch coil 114 is de-energized and latch rod 113 is re-inserted into latch receptacle 86 on connecting piston 83, so latch rod 113 is reset by rod spring 110, and the left end of latch rod 113 and connecting piston 83 are provided with corresponding chamfers.

In the above process, after the solenoid 50 moves to the right for a certain distance, the closing control latch 57 will fall under the action of the control latch spring 57a to block the solenoid 50, and prevent the solenoid 50 from being reset, because in the above process, the second horizontal rod 61 will move to the left, so that the slide switch 55 will slide down, and the positive terminal 52 and the negative terminal 53 will be disconnected, and the solenoid 50 will be powered off.

After the fault is eliminated, when reclosing is needed, only the control circuit switch 59b needs to be closed. Closing the control circuit switch 59b to enable the closing control circuit 59a to be conducted, controlling the latch coil 59 to be electrified, closing the control latch to move upwards to release the solenoid 50, resetting the solenoid 50 under the action of the tension spring 49a, enabling the automatic valve 45 to rotate anticlockwise, disconnecting the compressed air supply pipe 47 from the air cylinder inlet pipe 48, and enabling the air cylinder inlet pipe 48 to be directly communicated with the atmosphere, namely driving the air pressure on two sides of the air cylinder piston 41 to be consistent and not stressed any more.

The cylinder piston 41 is not stressed any more, that is, the moving cylinder 80 is not receiving a downward pulling force, therefore, under the action of the actuating rod spring 100, the actuating rod shoulder 102 carries the three-way valve actuating rod 76 to reset, and further the three-way valve 27 is switched to reset, so that the motor connecting pipe 28 is communicated with the atmosphere through the outer exhaust pipe 29, that is, the air pressures on the upper side and the lower side of the motor piston 22 are normal air pressures, so that the motor piston 22 is not stressed any more, and therefore, under the action of the motor spring 25, the motor piston 22 resets, the bridging contact 18 and the fixed contact 17 are reconnected through the piston rod 24, and the circuit breaker is switched on.

If the circuit breaker needs to be actively disconnected, the starting switch 58 is only needed to be turned on, the starting switch 58 is turned on, the positive terminal 52 and the negative terminal 53 are conducted, the solenoid 50 is electrified, and the position of the automatic valve 45 is changed to enable the compressed air supply pipe 47 to be communicated with the air cylinder air inlet pipe 48; the cylinder piston 41 is caused to move left, so that the operating rod 36 is driven to move downwards through the first horizontal rod 60, the idle rotation coupler 62, the second horizontal rod 61 and the crank 70, the operating rod 36 moves downwards to drag the movable cylinder 80 to move downwards (in the process, the piston latch 85 is always locked on the connecting piston 83), the two move synchronously, so that the three-way valve actuating rod 76 moves downwards to switch the state of the three-way valve 27, the fluid motor 20 is started to work, the bridging contact 18 and the fixed contact 17 are disconnected, and the circuit breaker is disconnected.

As can be seen from the above process, each time the circuit breaker trips and actively opens, a small amount of high-pressure fluid may be lost in the arc extinguish chamber 12 and the high-pressure chamber 88, the high-pressure fluid replenishing pipe 38 is arranged to replenish the high-pressure fluid, in order to avoid the backflow of the high-pressure fluid in the arc extinguish chamber 12 and the high-pressure chamber 88 caused by the pressure fluctuation in the high-pressure fluid replenishing pipe 38 from leaking from the high-pressure fluid replenishing pipe 38, the fluid automatic valve 37 is arranged, when the pressure in the arc extinguish chamber 12 and the high-pressure chamber 88 is greater than the pressure in the high-pressure fluid replenishing pipe 38, the valve core 122 is subjected to the downward gas pressure and the pulling force of the downward pull-back spring 121, so that the valve core 122 is tightly attached to the inner wall of the fluid automatic valve 37, the fluid through hole 123 is blocked, the high-pressure fluid replenishing pipe 38 is blocked, and when a certain amount of high-pressure fluid is lost in the arc extinguish chamber 12 and the high-pressure chamber 88, the pressure fluid replenishing pipe 38 is greater than the pressure in the arc extinguish chamber 12 and the high-pressure chamber 88, and after the pressure difference is greater than the pulling force of the pullback spring 121, the valve core 122 is lifted upwards to expose the fluid through hole 123, the pressurized fluid replenishing pipe 38 inflates the high-pressure chamber 88, and after the pressure on the two sides is equalized again due to inflation, the valve core 122 blocks the high-pressure fluid replenishing pipe 38 again under the action of the pulling force of the pullback spring 121, so that the air pressure in the arc extinguish chamber 12 and the high-pressure chamber 88 is always kept within a rated range.

Based on the above, the invention does not need to actuate most of the linkage devices when tripping, only needs the uppermost part of the linkage device, namely the connecting piston and the three-way valve actuating rod, to smoothly trip and trip, and the other parts can be kept static during the interval and even move in the opposite direction without preventing the high-speed tripping, and the reaction is quick and sensitive.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims

1. A high-voltage circuit breaker of quick tripping of automatic supplementary fluid of fire early warning system, including the cable (15), characterized by, still include the explosion chamber (12), metal connecting cylinder (90), hollow insulating column (30) and grounded outer box (33) that from top to bottom fixedly connect in proper order, the said cable (15) passes the explosion chamber (12) from left to right, the said explosion chamber (12) is full of the high-pressure fluid, and it has break assembly (16), fixed contact (17) and bridging contact (18), the said fixed contact (17) is set up on cable (15), the said bridging contact (18) is bridged between two fixed contacts (17);

the interruption assembly (16) comprises a fluid motor (20), a motor connecting pipe (28), a three-way valve (27) and an outer exhaust pipe (29), the fluid motor (20) comprises a motor cylinder (21) and a motor piston (22) which is connected in a sliding way in the motor cylinder (21), and the bottom of the motor piston (22) is also connected with the motor cylinder body (21) through a motor spring (25), the motor piston (22) is fixedly connected with the bridging contact (18) through a piston rod (24), the upper space (26) of the upper part of the motor piston (22) in the motor cylinder body (21) is connected with a three-way valve (27) through a motor connecting pipe (28), the lower part of the motor cylinder body (21) is communicated with the atmosphere through a motor exhaust pipe (23), one of the other two ports of the three-way valve (27) is directly communicated with the interior of the arc extinguish chamber (12), and the other port of the three-way valve is communicated with the atmosphere through an outer exhaust pipe (29);

the metal connecting cylinder (90) is internally provided with a releasable coupler (75), the releasable coupler (75) is connected with a three-way valve actuating rod (76) for switching a three-way valve (27), the releasable coupler (75) is further connected with a fluid pressure operator (32) through a connecting rod device (35), the connecting rod device (35) is positioned in a hollow insulating column (30), a high-pressure fluid supplementing pipe (38) is further arranged in the hollow insulating column (30), the high-pressure fluid supplementing pipe (38) is communicated with the metal connecting cylinder (90), the metal connecting cylinder (90) is also filled with high-pressure fluid, the metal connecting cylinder (90) is communicated with an arc extinguish chamber (12), and the fluid pressure operator (32) is arranged in a grounding outer box (33).

2. A fast tripping high voltage circuit breaker with automatic fluid replenishment for a fire warning system according to claim 1, wherein: the fluid pressure operator (32) comprises a cylinder (40), an automatic valve (45), a compressed air supply pipe (47), a solenoid (50), a closing control latch (57) and a lost motion coupler (62), wherein a cylinder piston (41) is connected in the cylinder (40) in a sliding mode, the part, on the left side of the cylinder piston (41), of the cylinder (40) is directly communicated with the atmosphere, a cylinder right space (43) on the right side of the cylinder piston (41) is connected with the automatic valve (45) through a cylinder air inlet pipe (48), and the compressed air supply pipe (47) is also connected with the automatic valve (45).

3. A fast tripping high voltage circuit breaker with automatic fluid replenishment for a fire warning system according to claim 2, characterized in that: the automatic valve (45) is fixedly connected to the rotary disc (49), a connecting piece is fixedly connected to the outer ring of the rotary disc (49), the left side and the right side of the connecting piece are respectively connected with the tension spring (49 a) and the solenoid (50), a sliding switch (55) and a starting switch (58) which are connected in parallel are further arranged between the positive terminal (52) and the negative terminal (53) of the solenoid (50), the solenoid (50) is provided with a closing control latch (57) in a matching mode, the closing control latch (57) is connected with the inner wall of the grounding outer box (33) through the control latch spring (57 a), a control latch coil (59) is arranged on the closing control latch (57), and the control latch coil (59) is connected with a closing control circuit (59 a).

4. A fast tripping high voltage circuit breaker with automatic fluid replenishment of a fire warning system according to claim 2 or 3, characterized in that: the connecting rod device (35) comprises a first horizontal rod (60), a second horizontal rod (61), an idle rotation connector (62), a crank (70) and an operating rod (36), the crank (70) is rotatably connected to the inner wall of the grounding outer box (33) through a fixed pivot (71), a lower arm end (72) and an upper arm end (74) of the crank (70) are respectively rotatably connected with the second horizontal rod (61) and the operating rod (36), the second horizontal rod (61) is connected with the first horizontal rod (60) through the idle rotation connector (62), the idle rotation connector (62) further comprises a retainer (63) and a connecting piston (64) which is slidably connected in the retainer (63), a connecting compression spring (65) is connected between the right side wall of the connecting piston (64) and the retainer (63), the second horizontal rod (61) is fixedly connected with the connecting piston (64), and the first horizontal rod (60) is fixedly connected with the retainer (63), the second horizontal rod (61) is provided with a bulge (104).

5. A fire early warning system automatic fluid replenishment fast trip high voltage circuit breaker according to claim 4 wherein: the releasable coupler (75) comprises a movable cylinder (80), a connecting piston (83), a piston latch (85) and a tubular guide part (92), the connecting piston (83) is connected in the movable cylinder (80) in a sliding manner, the connecting piston (83) is fixedly connected with a three-way valve actuating rod (76), the movable cylinder (80) is connected in the tubular guide part (92) in a sliding manner, a lower end wall (81) of the movable cylinder (80) is connected with an operating rod (36), the piston latch (85) is fixedly connected with the movable cylinder (80) and used for locking the connecting piston (83), a stopper (89) for preventing the connecting piston (83) from being separated is arranged in the movable cylinder (80), the high-pressure fluid supplementing pipe (38) is communicated with the lower space of the tubular guide part (92), a fluid automatic valve (37) is arranged on the high-pressure fluid supplementing pipe (38), a pullback spring (121) and a valve core (122) are arranged in the fluid automatic valve (37), the valve core (122) is connected in the fluid automatic valve (37) in a sliding mode, the lower end of the valve core is connected with the fluid automatic valve (37) through a pull-back spring (121), and a fluid through hole (123) is formed in the inclined side wall of the valve core (122).

6. A fire early warning system automatic fluid replenishment fast trip high voltage circuit breaker according to claim 5, wherein: piston latch (85) is including latch inserted bar (113), latch casing (87) and metal disc (116), latch inserted bar (113) pass latch casing (87) and sliding connection with it, its right-hand member and metal disc (116) fixed connection, be equipped with inserted bar shoulder (112) on latch inserted bar (113), the cover is equipped with inserted bar spring (110) on latch inserted bar (113) between inserted bar shoulder (112) right side wall and latch casing (87), still be equipped with piston latch coil (114) on latch casing (87), be equipped with on connecting piston (83) with latch inserted bar (113) matched with latch jack (86).

7. A fire early warning system automatic fluid replenishment fast trip high voltage circuit breaker according to claim 5, wherein: a sealed high-pressure chamber (88) is arranged in the metal connecting cylinder (90), the high-pressure chamber (88) is filled with high-pressure fluid which is the same as that in the arc extinguish chamber (12), the releasable coupling (75) being located in the high pressure chamber (88), the lower half of the tubular guide (92) communicating with the high pressure chamber (88) through a guide through hole (97), the upper half of the tubular guide (92) is provided with a non-pressurized chamber (94), the atmospheric pressure chamber (94) is communicated with the atmosphere through an external connecting pipeline (95), the space below the piston (83) connected in the movable cylinder (80) is a movable cylinder atmospheric pressure space (96), the movable cylinder atmospheric pressure space (96) is communicated with the atmospheric pressure chamber (94), a normal pressure cavity ring sealing element (98) is arranged at the joint of the tubular guide part (92) and the movable cylinder (80), and a normal-pressure space ring sealing piece (99) is arranged at the joint of the connecting piston (83) and the movable cylinder (80).

8. A fire early warning system automatic fluid replenishment fast trip high voltage circuit breaker according to claim 4 wherein: both ends fixedly connected with left terminal bush (13) and right terminal bush (14) about explosion chamber (12), cable (15) pass left terminal bush (13) and right terminal bush (14) and with the two fixed connection, action bars (36) adopt insulating material to make.

9. A fast tripping high voltage circuit breaker with automatic fluid replenishment for a fire warning system according to claim 1, wherein: an actuating rod shoulder (102) is arranged on the three-way valve actuating rod (76), the actuating rod shoulder (102) is arranged in the arc extinguish chamber (12), and an actuating rod spring (100) is connected between the actuating rod shoulder (102) and a bottom plate of the arc extinguish chamber (12).

10. A fast tripping high voltage circuit breaker with automatic fluid replenishment for a fire warning system according to claim 3, wherein: and a control circuit switch (59 b) is arranged on the closing control circuit (59 a).