CN111146758A

CN111146758A - Tripping mechanism and surge protector adopting same

Info

Publication number: CN111146758A
Application number: CN202010091694.XA
Authority: CN
Inventors: 孙巍巍
Original assignee: Tianjin C Power Technology Co ltd
Current assignee: Tianjin C Power Technology Co ltd
Priority date: 2020-01-24
Filing date: 2020-01-24
Publication date: 2020-05-12

Abstract

The invention provides a tripping mechanism and a surge protector adopting the tripping mechanism, wherein a first driving mechanism is arranged on a guide bracket and comprises a turning plate, the turning plate is hinged with the guide bracket, a movable contact piece is in transmission connection with the turning plate, and the turning plate is in transmission connection with a tripping piece; the surge protector comprises at least one tripping mechanism, a lightning protection element, a signal detection device and a micro control unit, wherein the tripping mechanism is connected in series with a circuit where the lightning protection element is located. The tripping mechanism in the scheme of the invention has simple and reliable structure and quick response, obviously improves the sensitivity, reliability and stability of switching-on and tripping actions, can repeatedly switch-on and trip, improves the use efficiency, has a manual tripping function, simultaneously meets the requirements of no tripping when lightning current or surge current impact occurs, quick and accurate tripping when power frequency current, short-circuit current or overload current occurs, improves the reliability and safety of a surge protector, prolongs the service life and ensures the safety of a low-voltage distribution line.

Description

Tripping mechanism and surge protector adopting same

Technical Field

The invention belongs to the technical field of low-voltage power distribution, and particularly relates to a tripping mechanism and a surge protector adopting the tripping mechanism.

Background

Surge Protector (SPD) is a device used for surge protection of power and signal devices, and is an indispensable device in low-voltage power distribution systems.

At present, in a low-voltage distribution environment, a voltage-limiting surge protector is most commonly used, and a piezoresistor with the advantages of quick response, low residual voltage, high impact resistance and the like is used as a lightning protection element. However, the characteristics of the piezoresistor have the defects of easy deterioration, unstable deterioration state, discontinuous resistance value change and the like, so that the piezoresistor is deteriorated after multiple lightning strokes or surge impacts, and generates leakage current and heat at the same time; or when power frequency short-circuit current appears in the circuit, the piezoresistor is conducted to generate heat, so that fire and other dangers are caused.

Firstly, a thermal tripping device based on the principle that low-temperature solder meets high-temperature melting is installed at a pin of a piezoresistor, when the piezoresistor generates heat, the temperature is transmitted to a low-temperature welding point, the solder melts to enable a tripping mechanism connected with the welding point to act, and then a piezoresistor channel is broken to enable a circuit to be separated from danger; and secondly, a circuit protection device (such as a circuit breaker or a fuse) is connected in series on a path where the surge protector is positioned, and when short-circuit current occurs in the path, the circuit protection device acts to cut off the path, so that the line is separated from danger.

However, the prior art has the following defects: first, in the first mode, the operation of the thermal trip device is based on the response of the low-temperature solder to temperature, the low-temperature solder is susceptible to the environment, and the melting point of the low-temperature solder is unstable; and the phenomenon that the tripping mechanism cannot be disengaged due to the adhesion of welding fluxes and wire drawing can occur under the constraint of a welding process; meanwhile, after the low-temperature solder of the thermal tripping device is fused, the surge protector can not be used any more, and the surge protector needs to be welded or replaced again and cannot be used repeatedly; next, in the second aspect, taking a circuit breaker as an example, the circuit breaker needs to satisfy a requirement that the circuit breaker does not operate immediately when the impact of the lightning current or the surge current (kA class, duration μ s class) comes, and operates immediately when the impact of the lightning current or the surge current (a class, duration ms class) comes. Because the contact mechanism inside the circuit breaker is repelled by Lorentz force when strong surge current flows, the requirement is difficult to meet; in addition, because the deterioration state of the piezoresistor is unstable, the short-circuit current in the line is different from several amperes to several hundred amperes, and the circuit protection device is difficult to accurately and timely act when any short-circuit current value passes through, so that the reliability and the safety of the surge protector are lower.

Therefore, in order to solve the above problems, it is necessary to provide a tripping mechanism and a surge protector using the tripping mechanism, which simultaneously meet the requirements of no tripping when lightning current or surge current impact occurs, and quick and accurate tripping when power frequency current, short circuit current or overload current occurs.

Disclosure of Invention

The invention aims to provide a tripping mechanism and a surge protector adopting the same, which solve the problems in the prior art, have simple and reliable structure and quick response, remarkably improve the sensitivity, reliability and stability of switching-on and tripping actions, can repeatedly switch-on and trip, improve the use efficiency, have a manual tripping function, simultaneously meet the requirements of no tripping when lightning current or surge current impact occurs and quick and accurate tripping when power frequency current, short-circuit current or overload current occurs, improve the reliability, safety and service life of the surge protector, ensure the safety of a low-voltage distribution line, avoid adopting a thermal tripping device or additionally adding a circuit protection device (such as a circuit breaker or a fuse) and reduce the use cost of a user.

In order to achieve the above object, an embodiment of the present invention provides a trip mechanism, which is characterized in that the trip mechanism includes a first driving mechanism, a guide bracket, a movable contact element and a trip element, the first driving mechanism is arranged on the guide bracket, the first driving mechanism includes a turning plate, the turning plate is hinged with the guide bracket, and the movable contact element is in transmission connection with the turning plate;

the take-off part comprises a hook part, a first trigger part, a third trigger part and a rotating shaft part, the rotating shaft part is connected with a first supporting rod, a second supporting rod and the third trigger part, the hook part is arranged at the tail end of the first supporting rod, and the first trigger part is arranged at the tail end of the second supporting rod;

the guide bracket is provided with a rotating shaft, the tripping piece is hinged with the guide bracket through the rotating shaft part and the rotating shaft which are matched, and the tripping piece is in transmission connection with the turning plate through the first triggering part (402); the tripping part is in transmission connection with a second driving mechanism through the third triggering part;

the movable contact piece is internally provided with a ring hanging piece and a reset elastic piece, and the hook part is movably connected with the ring hanging piece in a contact manner to realize closing and tripping.

Furthermore, the first driving mechanism further comprises a driver and a clamping shaft, the driver is in driving connection with the turning plate, the driver drives the turning plate to rotate, the clamping shaft is arranged on the guide support, and the turning plate is movably clamped on the clamping shaft.

Further, the turnover plate comprises a rotating part, a transmission part, a guide part and a pushing part which are sequentially connected, the movable contact part is movably connected with the transmission part in a contact manner, the rotating part is rotatably clamped on the clamping shaft, the guide part is movably connected with the guide support, the pushing part is in transmission connection with the release part, and the release part rotates along with the rotation of the pushing part.

Further, the first trigger part is in contact connection with the pushing part of the turning plate;

the second driving mechanism comprises a driving arm and a short-circuit protection mechanism which are connected, and the driving arm is in contact connection with the third triggering part.

Further, the guide support the rotating shaft is sleeved with a torsion spring piece, and one end of the torsion spring piece is fixed with the release piece.

Furthermore, the movable contact piece comprises a button and an ejector rod, a ring hanging piece is arranged in the button, the ring hanging piece is provided with a slotted part, the hook hanging part is matched with the slotted part of the ring hanging piece, a reset elastic piece is arranged in the button, the button is connected with the ejector rod, and the ejector rod is movably connected with the turning plate in a contact manner;

further, the driver is at least one of an electromagnetic coil, an electric push rod, a hydraulic rod and a pneumatic rod.

Further, first actuating mechanism still includes guide block and direction dop, the guide block has guide way and articulated shaft, the direction dop set up in on the guide bracket and wear to locate in the guide way, the guide part of turning over the board through the articulated shaft with the guide block hinge joint.

Further, the tripping part further comprises a second triggering part, the second triggering part is arranged between the rotating shaft part and the hook part, and the second triggering part is connected with a manual tripping button through a connecting rod and used for manual tripping operation.

Further, the second trigger part is sleeved with an insulating piece.

Further, the first trigger part is provided with a trigger surface matched with the pushing part.

Furthermore, the hook part is provided with a hanging surface matched with the slotted part.

Further, the direction of the torsion spring force is clockwise.

Further, the elastic restoring member is at least one of a coil spring, an elastic column, a torsion spring and a leaf spring.

A surge protector comprises at least one tripping mechanism.

The lightning protection device comprises a tripping device, a signal detection device and a micro control unit, wherein the tripping device comprises at least one piezoresistor, the tripping device is connected in series with a circuit where the lightning protection device is located, the signal detection device and the short-circuit protection device are sequentially sleeved on the circuit where the lightning protection device is located, the micro control unit is respectively connected with the signal detection device and a driver of the tripping device and is used for receiving a current signal sensed by the signal detection device and controlling the driver to act to drive the turning plate to rotate when the current magnitude and the duration of the current signal are detected to exceed a set current threshold and a set time threshold simultaneously, the pushing part rotates along with the rotation of the turning plate to push the first triggering part of the tripping device so as to enable the tripping device to rotate to trip a hook part of the tripping device from the hanging ring device, disconnecting the line;

the short-circuit protection mechanism drives the driving arm to act to trigger the third trigger part by the aid of short-circuit current of the line, so that the tripping part rotates to trip the hook part and the hanging ring part of the tripping part, the line is disconnected, and the line is in danger.

Further, the surge protector also comprises a communication interface connected with the micro control unit and used for being in communication connection with external equipment.

The tripping mechanism has the specific working processes that the initial state is that the hook part of the tripping piece and the slotted part of the ring hanging piece are in a tripping state, the line is in a disconnecting state, when the button is pressed down, the ejector rod presses down the transmission part of the turnover plate, meanwhile, the ring hanging piece moves downwards, the tripping piece enables the hook part of the tripping piece to be hooked with the slotted part of the downward-moving ring hanging piece under the action of clockwise force of the torsion spring piece, and after the button is released, the hook part of the tripping piece and the slotted part of the ring hanging piece are further firmly hooked under the rebound action of the reset elastic piece, so that the line is conducted, the switching-on is realized, the operation is convenient and fast, and the reliability and the stability are high;

the tripping operation process is that the driver acts to drive the turning plate to rotate clockwise, the pushing part rotates along with the rotation of the turning plate to push the first triggering part of the tripping part, and then the tripping part rotates anticlockwise to enable the hook part of the tripping part to be tripped from the hanging ring part, so that a circuit is disconnected and the circuit is separated from danger; the tripping mechanism has simple and reliable structure and quick response, obviously improves the sensitivity, reliability and stability of switching-on and tripping actions, can repeatedly switch-on and trip, and improves the use efficiency;

the tripping piece is also provided with a second triggering part which triggers the second triggering part to enable the tripping piece to rotate anticlockwise so that the hook part and the hanging ring piece are tripped, the circuit is disconnected, the circuit is separated from danger, and the manual tripping function is realized.

Embodiments of the present invention also provide a surge protector employing a trip mechanism, including at least one trip mechanism as in the previous embodiments.

The surge protector further comprises a lightning protection element, a signal detection device and a Micro Control Unit (MCU), wherein the lightning protection element comprises at least one piezoresistor, the tripping mechanism is connected in series with a circuit where the lightning protection element is located, the signal detection device and the short-circuit protection mechanism are sleeved on the circuit where the lightning protection element is located, the micro control Unit is respectively connected with the signal detection device and a driver of the tripping mechanism and is used for receiving a current signal sensed by the signal detection device, and when the current magnitude and duration of the detected current signal exceed a set current threshold and a set time threshold simultaneously, the driver is controlled to act to drive the turning plate to rotate, the pushing part rotates along with the rotation of the turning plate to push the first triggering part of the tripping part, so that the tripping part rotates to trip from the hook part and the hanging ring part, the circuit is disconnected, and the circuit is separated from danger; the micro control unit determines the current type according to the current size and duration, and the current type does not trip when the current type is determined to be lightning current or surge current impact, and the current type does not trip when the current type is determined to be power frequency current, short circuit current or overload current, so that the requirements of not tripping when the lightning current or surge current impact occurs and rapidly and accurately tripping when the power frequency current, short circuit current or overload current occurs are met.

Furthermore, the surge protector also comprises a communication interface connected with the micro control unit, is used for being in communication connection with external equipment, can be connected with the external equipment such as the intelligent concentrator, the monitoring host and the like, and is used for local and/or remote monitoring and management.

The tripping mechanism and the surge protector adopting the tripping mechanism have the advantages that: the problem that prior art exists can be solved, overall structure is simple reliable, and the response is fast, show the sensitivity that improves combined floodgate and dropout action, reliability and stability, and can repeat combined floodgate and dropout, improve the availability factor, manual dropout function also has, satisfy simultaneously and not detain when lightning current or surge current rush appear, when power frequency current appears, the requirement of quick accurate dropout when short-circuit current or overcurrent, it is dangerous that the broken-off line makes the circuit break away from, improve surge protector's reliability, security and life, ensure the safety of low pressure distribution lines, and needn't adopt thermal tripping device again or additionally increase circuit protection device again (like circuit breaker or fuse), user's use cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a trip mechanism provided in embodiment 1 of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1;

fig. 3 is a schematic perspective view of a trip mechanism according to embodiment 1 of the present invention;

fig. 4 is a schematic perspective view of a trip mechanism according to embodiment 2 of the present invention;

fig. 5 is a schematic partial cross-sectional view of a trip mechanism provided in embodiment 3 of the present invention;

fig. 6 is a schematic perspective view of a trip mechanism according to embodiment 3 of the present invention;

fig. 7 is a schematic perspective view of a trip mechanism according to embodiment 4 of the present invention;

fig. 8 is a schematic partial cross-sectional view of a trip mechanism provided in embodiment 5 of the present invention;

fig. 9 is a schematic perspective view of a trip mechanism according to embodiment 5 of the present invention;

fig. 10 is a schematic partial cross-sectional view of a trip mechanism provided in embodiment 6 of the present invention;

fig. 11 is a schematic perspective view of a trip mechanism according to embodiment 6 of the present invention;

fig. 12 is a schematic structural diagram of a surge protector employing a trip mechanism according to embodiment 7 of the present invention;

fig. 13 is a block diagram of a surge protector employing a trip mechanism according to embodiment 8 of the present invention;

fig. 14 is a schematic structural diagram of a surge protector employing a trip mechanism according to embodiment 8 of the present invention, after the housing is removed;

fig. 15 is a schematic structural diagram of a trip mechanism of a surge protector employing the trip mechanism according to embodiment 8 of the present invention;

fig. 16 is a block diagram of a surge protector employing a trip mechanism according to embodiment 9 of the present invention.

In the drawings: 1. a first drive mechanism; 101. a tripping mechanism; 102. a driver; 103. clamping a shaft; 104. a guide block; 105. a guide groove; 106. a guide chuck; 107. turning over a plate; 108. a guide portion; 109. a rotating part; 110. a transmission section; 111. a pushing part; 112. hinging a shaft; 2. a guide bracket; 201. a rotating shaft; 202. a torsion spring member; 3. a movable contact member; 301. a button; 302. hanging ring pieces; 303. grooving part; 304. a restoring elastic member; 305. a top rod; 4. releasing the fastener; 401. a hook portion; 402. a first trigger section; 403. a rotating shaft part; 404. a second trigger section; 405. a third trigger section; 5. a lightning protection element; 6. a signal detection device; 7. a micro control unit; 8. a communication interface; 9. line, 10, surge protector; 11. a manual trip button; 12. a connecting rod; 13. a second drive mechanism; 131. a drive arm; 132. short-circuit protection mechanism.

Detailed Description

The trip mechanism and the surge protector using the trip mechanism according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

A tripping mechanism comprises a first driving mechanism 1, a guide bracket 2, a movable contact piece 3 and a tripping piece 4, wherein the first driving mechanism 1 is erected on the guide bracket 2, the first driving mechanism 1 comprises a turning plate 107, the turning plate 107 is hinged with the guide bracket 2, and the movable contact piece 3 is in transmission connection with the turning plate 107;

the trip unit 4 comprises a hook part 401, a first trigger part 402, a third trigger part 405 and a rotating shaft part 403, the rotating shaft part 403 is connected with a first supporting rod, a second supporting rod and the third trigger part 405, the hook part 401 is arranged at the tail end of the first supporting rod, and the first trigger part 402 is arranged at the tail end of the second supporting rod;

a rotating shaft 201 is arranged on the guide support 2, the release piece 4 is hinged with the guide support 2 through the rotating shaft part 403 and the rotating shaft 201 which are matched, and the release piece 4 is in transmission connection with the turning plate 107 through a first triggering part 402; the release fastener 4 is in transmission connection with the second driving mechanism 13 through a third triggering part 405;

a ring hanging piece 302 and a reset elastic piece 304 are arranged in the movable contact piece 3, and a hook part 401 is movably connected with the ring hanging piece 302 in a contact manner to realize closing and releasing.

The first driving mechanism 1 further comprises a driver 102 and a clamping shaft 103, the driver 102 is in driving connection with the turning plate 107, the driver 102 drives the turning plate 107 to rotate, the clamping shaft 103 is arranged on the guide support 2, and the turning plate 107 is movably clamped on the clamping shaft 103.

The flap 107 comprises a rotating part 109, a transmission part 110, a guide part 108 and a pushing part 111 which are connected in sequence, the movable contact element 3 is movably contacted and connected with the transmission part 110, the rotating part 109 is rotatably clamped on the clamping shaft 103, the guide part 108 is movably connected with the guide bracket 2, the pushing part 111 is in transmission connection with the release element 4, and the release element 4 rotates along with the rotation of the pushing part 111.

The first trigger part 402 is in contact connection with the pushing part 111 of the flap 107;

the second driving mechanism 13 includes a driving arm 131 and a short-circuit protection mechanism 132 connected to each other, and the driving arm 131 is connected to the third trigger 405 in contact therewith. Short-circuit protection mechanism 132 includes quiet iron core, move iron core and torsional spring, quiet iron core, it is articulated that the iron core moves through the fixed axis, the torsional spring sets up quiet iron core, move in the iron core and overlap and put on the fixed axis, actuating arm 131 supports through the torsional spring and puts on moving the iron core, set up the pivot on the actuating arm 131, short-circuit protection mechanism 132 adopts current products, when the circuit of locating passes through short-circuit current, it upwards presses close to quiet iron core to move the iron core to move, actuating arm 131 one end is along quiet iron core upward movement, actuating arm 131 revolute axle counter-clockwise turning, the other end downward movement of actuating arm 131 triggers third trigger part 405, and then realize short-circuit protection mechanism 132 drive actuating arm 131, actuating arm 131 action triggers third trigger part 405, make take off 4 rotation and make its couple portion 401 and link piece 302 dropout, the circuit is broken off.

A torsion spring element 202 is sleeved on a rotating shaft 201 of the guide bracket 2, and one end of the torsion spring element 202 is fixed with the release piece 4.

The movable contact piece 3 comprises a button 301 and a push rod 305, a ring hanging piece 302 is arranged in the button 301, the ring hanging piece 302 is provided with a slotted part 303, a hook part 401 is matched with the slotted part 303 of the ring hanging piece 302, a reset elastic piece 304 is arranged in the button 301, the button 301 is connected with the push rod 305, and the push rod 305 is movably connected with the turnover plate 107 in a contact way;

the driver 102 is at least one of an electromagnetic coil, an electric push rod, a hydraulic rod and a pneumatic rod.

The first driving mechanism 1 further comprises a guide block 104 and a guide chuck 106, the guide block 104 is provided with a guide groove 105 and a hinge shaft 112, the guide chuck 106 is arranged on the guide bracket 2 and penetrates through the guide groove 105, and the guide part 108 of the turning plate 107 is hinged with the guide block 104 through the hinge shaft 112.

The tripping part 4 further comprises a second triggering part 404, the second triggering part 404 is arranged between the rotating shaft part 403 and the hook part 401, the tripping part rotates anticlockwise to enable the hook part to be tripped from the hanging ring part, a circuit is disconnected, the circuit is enabled to be separated from danger, and the manual tripping function is achieved.

The first trigger part 402 is provided with a trigger surface which cooperates with the pushing part 111.

The hook portion 401 has a hook surface that is engaged with the slot portion 303.

The direction of the force of the torsion spring member 202 is clockwise.

The return elastic member 304 is at least one of a coil spring, an elastic cylinder, a torsion spring, and a leaf spring.

A surge protector includes at least one trip mechanism.

The lightning protection device comprises a lightning protection element 5, a signal detection device 6 and a micro control unit 7, wherein the lightning protection element 5 comprises at least one piezoresistor, a tripping mechanism is connected in series with a circuit where the lightning protection element 5 is located, the signal detection device 6 and a short-circuit protection mechanism 132 are sleeved on the circuit where the lightning protection element 5 is located, the micro control unit 7 is respectively connected with the signal detection device 6 and a driver 102 of the tripping mechanism and is used for receiving a current signal sensed by the signal detection device 6, and when the current magnitude and the duration of the detected current signal exceed a set current threshold and a set time threshold simultaneously, the driver 102 is controlled to act to drive the turning plate 107 to rotate, the pushing part 111 rotates along with the rotation of the turning plate 107 to push the first triggering part 402 of the tripping element 4, so that the tripping element 4 rotates to trip a hook part 401 of the tripping element from a;

when the short-circuit current flows through the line, the driving arm 131 of the short-circuit protection mechanism 132 operates to trigger the third trigger part 405, so that the tripping part 4 rotates to trip the hook part 401 from the hanging ring part 302, and the line is disconnected, so that the line is in danger.

The second triggering part 404 is connected with the manual tripping button 11 through the connecting rod 12, when manual tripping or debugging of a tripping mechanism is needed, the second triggering part 404 is triggered through the connecting rod 12 by manually pulling the tripping button 12 downwards, the tripping part 4 rotates anticlockwise to be released from the slotting part 303 of the hanging ring piece 302, the tripping mechanism 101 is separated, the tripping mechanism 101 is disconnected from the lightning protection element 5, the effect of manually tripping a disconnected circuit is realized, and the reliability is improved.

The surge protector also comprises a communication interface 8 connected with the micro control unit 7 for communication connection with external equipment.

Example 1

Fig. 1 is a schematic structural diagram of a trip mechanism provided in embodiment 1 of the present invention; FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1; fig. 3 is a schematic perspective view of a trip mechanism according to embodiment 1 of the present invention;

the second driving mechanism 13 includes a driving arm 131 and a short-circuit protection mechanism 132 connected to each other, and the driving arm 131 is connected to the third trigger 405 in contact therewith. The short-circuit protection mechanism 132 comprises a static iron core, a movable iron core and a torsion spring, the short-circuit protection mechanism 132 drives the driving arm 131 when a line passes through a short-circuit current, the driving arm 131 acts to trigger the third trigger part 405, the tripping part 4 rotates to enable the hook part 401 to be tripped from the hanging ring part 302, the line is disconnected, and the line is separated from danger.

The specific working process of the tripping mechanism is that the initial state is that the hook part 401 of the tripping element 4 and the hanging ring element 302 are in a tripping state, the circuit is in a disconnecting state, when the movable contact element 3 is pressed down, the movable contact element 3 presses down the turning plate 107, the hanging ring element 302 moves downwards at the same time, the turning plate 107 is in transmission connection with the tripping element 4, the tripping element 4 rotates clockwise, the hook part 401 of the tripping element 4 is hooked with the slotted part 303 of the downwards-moving hanging ring element 302, after the movable contact element 3 is released, the hanging ring element 302 of the movable contact element 3 moves upwards under the resilience action of the reset elastic element 304, the hook part 401 of the tripping element 4 is further firmly hooked with the hanging ring element 302, the circuit is conducted, the switching-on is realized, the operation is convenient and rapid, and the reliability and the stability are high; the tripping operation process is that the first driving mechanism 1 acts to drive the turning plate 107 to rotate clockwise, the turning plate 107 rotates to push the tripping piece 4 to move, and then the tripping piece 4 rotates anticlockwise to trip the hook part 401 and the hanging ring piece 302, so as to disconnect a line and break the line away from danger.

When the line passes through the short-circuit current, the driving arm 131 of the short-circuit protection mechanism 132 acts to trigger the third trigger part 405, so that the tripping part 4 rotates to trip the hook part 401 from the hanging ring part 302, and the line is disconnected, so that the line is in danger.

Example 2

besides the technical scheme of the embodiment 1, the method also comprises the following technical scheme:

the first driving mechanism 1 further comprises a driver 102 and a clamping shaft 103, the driver 102 is arranged on the guide support 2, the driver 102 is in driving connection with the turning plate 107, the driver 102 drives the turning plate 107 to rotate, the clamping shaft 103 is arranged on the guide support 2, and the turning plate 107 is movably clamped on the clamping shaft 103.

The specific working process of the tripping mechanism is that the initial state is that the hook part 401 of the tripping element 4 and the hanging ring element 302 are in a tripping state, the line is in a disconnecting state, when the movable contact element 3 is pressed down, the movable contact element 3 presses down the turning plate 107 and simultaneously the hanging ring element 302 moves downwards, the turning plate 107 is movably clamped on the clamping shaft 103, the turning plate 107 rotates anticlockwise, the turning plate 107 is in transmission connection with the tripping element 4, the tripping element 4 rotates clockwise, the hook part 401 of the tripping element 4 is hooked with the downward moving hanging ring element 302, after the movable contact element 3 is released, the hanging ring element 302 of the movable contact element 3 moves upwards under the resilience action of the resetting elastic element 304, the hook part 401 of the tripping element 4 is further firmly hooked with the hanging ring element 302, the line is conducted, the switching-on is realized, the operation is convenient and fast, and the reliability and the stability are high; the tripping operation process is that the driver 102 acts to drive the turning plate 107 to rotate clockwise, the turning plate 107 rotates to push the tripping piece 4 to move, and then the tripping piece 4 rotates anticlockwise to trip the hook part 401 and the hanging ring piece 302, so as to break the line and break the line away from danger.

Example 3

Fig. 5 is a schematic partial cross-sectional view of a trip mechanism provided in embodiment 3 of the present invention; fig. 6 is a schematic perspective view of a trip mechanism according to embodiment 3 of the present invention;

The specific working process of the tripping mechanism is that the initial state is that the hook part 401 of the tripping element 4 and the hanging ring element 302 are in a tripping state, the line is in a disconnection state, when the movable contact element 3 is pressed down, the push rod 305 presses down the transmission part 110 of the turning plate 107, meanwhile, the hanging ring element 302 moves downwards, the hook part 401 of the tripping element 4 is hooked with the downwards-moving hanging ring element 302, after the contact element 3 is released and started, the hook part 401 of the tripping element 4 is further firmly hooked with the hanging ring element 302 under the resilience action of the reset elastic element 304, the line is conducted, the closing is realized, the operation is convenient and fast, and the reliability and the stability are high; the tripping operation process is that the driver 102 acts to drive the turning plate 107 to rotate clockwise, the pushing part 111 rotates along with the rotation of the turning plate 107 to push the tripping part 4, so that the tripping part 4 rotates anticlockwise to trip the hook part 401 from the hanging ring piece 302, and a circuit is disconnected, so that the circuit is disconnected from danger.

Example 4

besides the technical scheme of any one of embodiments 1-3, the method also comprises the following technical scheme:

a torsion spring element 202 is sleeved on a rotating shaft 201 of the guide bracket 2, and one end of the torsion spring element 202 is fixed with the release piece 4. The direction of the force of the torsion spring member 202 is clockwise.

The initial state is that the hook part 401 of the release 4 and the hanging ring piece 302 are in a releasing state, the circuit is in a disconnecting state, when the movable contact 3 is pressed down, the push rod 305 presses down the transmission part 110 of the turning plate 107, the hanging ring piece 302 moves downwards, and the hook part 401 of the release 4 is hooked with the downwards moving hanging ring piece 302 under the action of the clockwise force of the torsion spring 202.

Example 5

Fig. 8 is a schematic partial cross-sectional view of a trip mechanism provided in embodiment 5 of the present invention; fig. 9 is a schematic perspective view of a trip mechanism according to embodiment 5 of the present invention;

besides the technical scheme of the embodiment 4, the method also comprises the following technical scheme:

The first driving mechanism 1 further comprises a guide block 104 and a guide chuck 106, the guide block 104 is provided with a guide groove 105 and a hinge shaft 112, the guide chuck 106 is arranged on the guide bracket 2 and penetrates through the guide groove 105, and a guide part 108 of the turning plate 107 is hinged with the guide block 104 through the hinge shaft 112, so that the turning plate 107 rotates along the direction of the guide groove 105 and the direction of the guide chuck 106.

Example 6

Fig. 10 is a schematic partial cross-sectional view of a trip mechanism provided in embodiment 6 of the present invention; fig. 11 is a schematic perspective view of a trip mechanism according to embodiment 6 of the present invention;

the tripping mechanism comprises a first driving mechanism 1, a guide bracket 2, a movable contact piece 3 and a tripping piece 4; the first driving mechanism 1 comprises a driver 102, a clamping shaft 103 and a turning plate 107, wherein the clamping shaft 103 is arranged on the guide bracket 2, the turning plate 107 is provided with a guide part 108, a rotating part 109, a transmission part 110 and a pushing part 111, the rotating part 109 is clamped on the clamping shaft 103, the driver 102 is in driving connection with the turning plate 107, the driver 102 drives the turning plate 107 to rotate, and the pushing part 111 rotates along with the rotation of the turning plate 107;

the guide bracket 2 is provided with a rotating shaft 201 and a torsion spring element 202, and the torsion spring element 202 is sleeved on the rotating shaft 201;

the movable contact piece 3 comprises a button 301 and a push rod 305, a ring hanging piece 302 is arranged in the button 301, the ring hanging piece 302 is provided with a slotted part 303, a reset elastic piece 304 is arranged in the button 301, the push rod 305 is connected with the lower part of the button 301, and the push rod 305 corresponds to the transmission part 110 of the turning plate 107; the release member 4 comprises a hook part 401, a first trigger part 402 and a rotating shaft part 403, the rotating shaft part 403 is connected with the guide bracket 2 through the rotating shaft 201, the hook part 401 corresponds to the slotted part 303 of the hanging ring member 302, and the first trigger part 402 corresponds to the pushing part 111 of the turning plate 107.

The first driving mechanism 1 further comprises a guide block 104 and a guide chuck 106, the guide block 104 is provided with a guide groove 105 and a hinge shaft 112, the guide part 108 of the turning plate 107 is hinged with the guide block 104 through the hinge shaft 112, and the guide chuck 106 is arranged on the guide bracket 2 and penetrates through the guide groove 105, so that the turning plate 107 rotates along the directions of the guide groove 105 and the guide chuck 106.

The tripping part 4 further comprises a second triggering part 404 for manual operation, and the second triggering part 404 is manually pulled downwards to realize the function of manually tripping and disconnecting the circuit, so that the reliability is increased.

When the circuit passes through the short-circuit current, the driving arm 131 acts to trigger the third trigger part 405, so that the tripping part 4 rotates to trip the hook part 401 from the hanging ring part 302, and the circuit is disconnected, so that the circuit is disconnected from danger.

The first triggering portion 402 has a triggering surface that is engaged with the pushing portion 111, and may be a plane, an inclined surface, an arc surface, or any combination thereof.

The hook portion 401 has a hook surface that is engaged with the slot portion 303, and may be a plane, an inclined surface, an arc surface, or any combination thereof.

The direction of the force of the torsion spring member 202 is clockwise.

The specific working process of the tripping mechanism is that the initial state is that the hook part 401 of the tripping element 4 and the slotted part 303 of the hanging ring element 302 are in a tripping state, the circuit is in a disconnection state, when the button 301 is pressed, the push rod 305 presses the transmission part 110 of the turning plate 107, the hanging ring element 302 moves downwards at the same time, the tripping element 4 enables the hook part 401 to be hooked with the slotted part 303 of the downwards-moving hanging ring element 302 under the action of the clockwise force of the torsion spring element 202, at this time, after the button 301 is released, under the rebound action of the reset elastic element 304, the hook part 401 of the tripping element 4 and the slotted part 303 of the hanging ring element 302 are further firmly hooked, the circuit is conducted, the closing is realized, the operation is convenient and rapid, and the reliability and the stability are high;

the tripping operation process is that the driver 102 acts to drive the turning plate 107 to rotate clockwise, the pushing part 111 rotates along with the rotation of the turning plate 107 to push the first triggering part 402 of the tripping part 4, so that the tripping part 4 rotates anticlockwise to enable the hook part 401 to trip from the hanging ring piece 302, a circuit is disconnected, and the circuit is separated from danger;

The tripping mechanism has simple and reliable structure and quick response, obviously improves the sensitivity, reliability and stability of closing and tripping actions, is convenient to operate, can repeatedly close and trip, improves the use efficiency, is also provided with a second triggering part for triggering the second triggering part to enable the tripping part to rotate anticlockwise so as to enable the hook part to trip from the hanging ring part, breaks a circuit, breaks the circuit, realizes the manual tripping function, and does not need to adopt a thermal tripping device or additionally add a circuit protection device.

Example 7

a surge protector employing a trip mechanism includes at least one trip mechanism as in previous embodiments 1-6.

Example 8

Fig. 13 is a junction of a surge protector employing a trip mechanism according to embodiment 8 of the present invention

besides the technical proposal of the embodiment 7, the method also comprises the following technical proposal:

the surge protector adopting the tripping mechanism further comprises a lightning protection element 5, a signal detection device 6 and a micro control unit 7, wherein the lightning protection element 5 comprises at least one piezoresistor, the tripping mechanism 101 is connected in series with a circuit where the lightning protection element 5 is located, the signal detection device 9 adopts a current transformer, the signal detection device 6 and the short-circuit protection mechanism 132 are sleeved on the circuit where the lightning protection element 5 is located, the micro control unit 7 is respectively connected with the signal detection device 6 and a driver 102 of the tripping mechanism and is used for receiving a current signal sensed by the signal detection device 6, and when the current magnitude and duration of the detected current signal exceed a set current threshold and a set time threshold at the same time, the driver 102 is controlled to act to drive the turning plate 107 to rotate, the pushing part 111 rotates along with the rotation of the turning plate 107 to push the first triggering part 402 of the tripping part 4 to rotate, so that the hooking part 401 of the tripping part 4 is tripped from, disconnecting the line to make the line break away from danger; the micro control unit determines the current type according to the current size and duration, and the current type does not trip when the current type is determined to be lightning current or surge current impact, and the current type does not trip when the current type is determined to be power frequency current, short circuit current or overload current, so that the requirements of not tripping when the lightning current or surge current impact occurs and rapidly and accurately tripping when the power frequency current, short circuit current or overload current occurs are met.

The signal detection device can adopt one or more of a temperature sensor, a current transformer and a magnetic field sensor.

Example 9

Fig. 16 is a block diagram of a surge protector employing a trip mechanism according to embodiment 9 of the present invention;

besides the technical proposal of the embodiment 9, the method also comprises the following technical proposal:

the surge protector also comprises a communication interface 8 connected with the micro control unit 7, which is used for being in communication connection with external equipment, can be connected with external equipment such as an intelligent concentrator, a monitoring host and the like, and is used for local and/or remote monitoring and management, and the intelligent concentrator can adopt products capable of realizing data acquisition, processing, uploading and issuing.

Compared with the prior art, the tripping mechanism has simple and reliable structure and quick response, obviously improves the sensitivity, reliability and stability of switching-on and tripping actions, can repeatedly switch-on and trip, improves the use efficiency, has a manual tripping function, simultaneously meets the requirements of no tripping when lightning current or surge current impact occurs and quick and accurate tripping when power frequency current, short-circuit current or overload current occurs, breaks a circuit to break the circuit to cause the circuit to break away from danger, improves the reliability, the safety and the service life of the surge protector, ensures the safety of a low-voltage distribution circuit, does not need to adopt a thermal tripping device or additionally add a circuit protection device (such as a circuit breaker or a fuse), and reduces the use cost of a user.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A tripping mechanism is characterized by comprising a first driving mechanism (1), a guide support (2), a movable contact piece (3) and a tripping piece (4), wherein the first driving mechanism (1) is erected on the guide support (2), the first driving mechanism (1) comprises a turning plate (107), the turning plate (107) is hinged with the guide support (2), and the movable contact piece (3) is in transmission connection with the turning plate (107);

the fastening releasing piece (4) comprises a hook part (401), a first triggering part (402), a third triggering part (405) and a rotating shaft part (403), the rotating shaft part (403) is connected with a first supporting rod, a second supporting rod and the third triggering part (405), the hook part (401) is arranged at the tail end of the first supporting rod, and the first triggering part (402) is arranged at the tail end of the second supporting rod;

a rotating shaft (201) is arranged on the guide support (2), the release piece (4) is hinged with the guide support (2) through the rotating shaft part (403) and the rotating shaft (201) which are matched, and the release piece (4) is in transmission connection with the turning plate (107) through the first trigger part (402); the tripping part (4) is in transmission connection with a second driving mechanism (13) through the third triggering part (405);

a ring hanging piece (302) and a reset elastic piece (304) are arranged in the movable contact piece (3), and the hook hanging part (401) is movably connected with the ring hanging piece (302) in a contact manner to realize closing and tripping.

2. The trip mechanism according to claim 1, wherein the first driving mechanism (1) further comprises a driver (102) and a clamping shaft (103), the driver (102) is in driving connection with the turning plate (107), the driver (102) drives the turning plate (107) to rotate, the clamping shaft (103) is arranged on the guide bracket (2), and the turning plate (107) is movably clamped on the clamping shaft (103).

3. The trip mechanism according to claim 2, wherein the flap (107) comprises a rotating part (109), a transmission part (110), a guide part (108) and a pushing part (111) which are connected in sequence, the movable contact element (3) is movably connected with the transmission part (110) in a contact manner, the rotating part (109) is movably clamped on the clamping shaft (103), the guide part (108) is movably connected with the guide bracket (2), the pushing part (111) is connected with the tripping element (4) in a transmission manner, and the tripping element (4) rotates along with the rotation of the pushing part (111).

4. Trip mechanism according to claim 3, characterized in that the first trigger part (402) is in contact connection with the push part (111) of the flap (107);

the second driving mechanism (13) comprises a driving arm (131) and a short-circuit protection mechanism (132), wherein the driving arm (131) is connected with the third trigger part (405) in a contact mode.

5. The trip mechanism according to claim 1, 2, 3 or 4, characterized in that a torsion spring element (202) is sleeved on the rotating shaft (201) of the guide bracket (2), and one end of the torsion spring element (202) is fixed with the trip unit (4).

6. The tripping mechanism according to claim 1, 2, 3 or 4, wherein the movable contact piece (3) comprises a button (301) and a push rod (305), a loop hanging piece (302) is arranged in the button (301), the loop hanging piece (302) is provided with a slotted part (303), the hook hanging part (401) is matched with the slotted part (303) of the loop hanging piece (302), a reset elastic piece (304) is arranged in the button (301), the button (301) is connected with the push rod (305), and the push rod (305) is movably connected with the turning plate (107) in a contact manner.

7. Trip mechanism according to claim 3, characterized in that the first drive mechanism (1) further comprises a guide block (104) and a guide chuck (106), the guide block (104) having a guide slot (105) and a hinge shaft (112), the guide chuck (106) being arranged on the guide bracket (2) and penetrating in the guide slot (105), the guide portion (108) of the flap (107) being hinged to the guide block (104) via the hinge shaft (112).

8. The trip mechanism according to claim 4, wherein the trip unit (4) further comprises a second triggering portion (404), the second triggering portion (404) is disposed between the rotating shaft portion (403) and the hook portion (401), and the second triggering portion (404) is connected to the manual trip button (11) through a connecting rod (12) for manual trip operation.

9. A surge protector, characterized in that it comprises at least one trip mechanism (101) according to any of claims 1-8.

10. The surge protector of claim 9, further comprising a signal detection device (6), a lightning protection element (5) and a micro control unit (7), wherein the lightning protection element (5) comprises at least one voltage dependent resistor, the trip mechanism (101) is connected in series to a line on which the lightning protection element (5) is located, the signal detection device (6) and the short-circuit protection mechanism (132) are sequentially sleeved on the line on which the lightning protection element (5) is located, the micro control unit (7) is respectively connected to the signal detection device (6) and the driver 102 of the trip mechanism (101) and is configured to receive a current signal sensed by the signal detection device (6) and control the driver (102) to operate to drive the turning plate (107) to rotate when the current magnitude and duration of the current signal exceed a set current threshold and a set time threshold simultaneously, the pushing part (111) rotates along with the rotation of the turning plate (107) to push the first triggering part (402) of the tripping part (4) to rotate, so that the tripping part (4) rotates to enable the hook part (401) to be tripped from the ring hanging part (302), a circuit is disconnected, and the circuit is separated from danger;

when a circuit passes through short-circuit current, the short-circuit protection mechanism (132) drives the driving arm (131), the driving arm (131) acts to trigger the third trigger part (405), so that the tripping part (4) rotates to enable the hook part (401) to be tripped with the ring hanging part (302), the circuit is disconnected, and the circuit is disconnected from danger.