A quick opening mechanism for a rail vacuum circuit breaker

Abstract

The application relates to the technical field of vacuum circuit breakers, and discloses a quick opening mechanism for a rail vacuum circuit breaker, which comprises a mechanism box, an arc extinguishing chamber is fixedly installed at the top of the mechanism box, a same rotating rod is rotatably installed on the front inner wall and the rear inner wall of the mechanism box, a flap is rotatably installed on the rotating rod, a control module is arranged on the inner wall of the top of the mechanism box, a capacitor energy storage unit is arranged on the inner wall of the bottom of the mechanism box, the capacitor energy storage unit is electrically connected with the control module, and an electromagnetic mechanism is arranged between the mechanism box and the flap; and a static contact rod is arranged on the inner wall of the top of the arc extinguishing chamber. The application has the following advantages and effects: the barrier mechanism is arranged, a physical barrier is formed between the static contact and the dynamic contact after the baffle extends, the insulation strength after opening can be enhanced, arc reignition or accidental contact of the dynamic contact and the static contact caused by external factors such as vibration can be effectively prevented, and the stable and reliable opening state can be ensured.

Description

Technical Field

[0001] This application relates to the field of vacuum circuit breaker technology, and in particular to a fast tripping mechanism for a track vacuum circuit breaker. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. Circuit breakers are classified into high-voltage circuit breakers and low-voltage circuit breakers according to their application range. The boundary between high and low voltage is somewhat blurred; generally, circuit breakers above 3kV are referred to as high-voltage electrical appliances.

[0003] In practical use, it has been found that the insulation design of the existing tripping mechanism relies solely on the vacuum insulation of the arc-extinguishing chamber itself, without setting an additional insulation reinforcement structure for the contact gap after tripping. When there are changes in humidity or dust accumulation in the track environment, the insulation performance of the contact gap is easily affected, which increases the risk of breakdown. Therefore, we propose a fast tripping mechanism for track vacuum circuit breakers to solve the above problems. Utility Model Content

[0004] The purpose of this application is to address the shortcomings of existing technologies, such as the lack of additional insulation reinforcement structures for the contact gap after tripping, which makes the insulation performance of the contact gap susceptible to changes in humidity or dust accumulation in the track environment, increasing the risk of breakdown. Therefore, this application proposes a fast tripping mechanism for a track vacuum circuit breaker.

[0005] The above-mentioned technical objective of this application is achieved through the following technical solution: a fast tripping mechanism for a track vacuum circuit breaker, comprising a mechanism box, an arc-extinguishing chamber fixedly installed on the top of the mechanism box, a rotating rod rotatably installed on the front inner wall and the rear inner wall of the mechanism box, a rocker arm rotatably installed on the rotating rod, a control module provided on the top inner wall of the mechanism box, a capacitor energy storage unit provided on the bottom inner wall of the mechanism box, the capacitor energy storage unit being electrically connected to the control module, an electromagnetic mechanism provided between the mechanism box and the rocker arm; a stationary contact rod provided on the top inner wall of the arc-extinguishing chamber, a stationary contact at the bottom end of the stationary contact rod, a moving contact rod slidably installed on the bottom inner wall of the arc-extinguishing chamber, the bottom end of the moving contact rod extending into the mechanism box, a moving contact at the top end of the moving contact rod, functional boxes fixedly installed on both inner walls of the arc-extinguishing chamber, a rotating shaft rotatably installed on the rear inner wall of the functional box, the front end of the rotating shaft extending to the outside of the functional box, a T-shaped plate fixedly sleeved on the moving contact rod, a gear mechanism provided between the T-shaped plate and the rotating shaft, and a baffle mechanism provided inside the functional box.

[0006] A further configuration of this application is as follows: the electromagnetic mechanism includes an electromagnetic repulsion coil and a metal repulsion disk. An electromagnetic repulsion coil is provided on the inner wall of the bottom of the mechanism box. The electromagnetic repulsion coil is located on the right side of the capacitor energy storage unit. The electromagnetic repulsion coil is electrically connected to the capacitor energy storage unit. A metal repulsion disk is provided on the right side of the bottom of the rocker. The electromagnetic repulsion coil and the metal repulsion disk are compatible.

[0007] By adopting the above technical solution and by setting up an electromagnetic mechanism, the capacitor energy storage unit releases a strong current to the electromagnetic repulsion coil. The electromagnetic repulsion coil instantly generates a strong magnetic field, which generates an upward electromagnetic repulsion force on the metal repulsion disk at the bottom of the rocker, pushing the rocker to rotate rapidly clockwise around the rotating rod.

[0008] A further feature of this application is that a rotating seat is fixedly installed at the bottom end of the moving contact rod, and the rotating seat is rotatably connected to the left end of the rocker.

[0009] By adopting the above technical solution and by setting a rotating seat, the rocker can drive the moving contact rod to slide down the inner wall of the bottom of the arc-extinguishing chamber, so that the moving contact and the stationary contact can be quickly separated. This can achieve the purpose of quickly cutting off the fault circuit, isolating the fault, and preventing the fault from expanding and affecting the safe operation of the track circuit.

[0010] A further feature of this application is that the gear mechanism includes a rack plate and a gear, with rack plates fixedly installed at both ends of the T-shaped plate, and a gear fixedly sleeved at the front end of the rotating shaft, wherein the rack plate and the corresponding gear are adapted to each other.

[0011] By adopting the above technical solution and by setting a gear mechanism, the moving contact rod can drive the rotating shaft to rotate, thereby achieving the purpose of driving the eccentric wheel to rotate synchronously.

[0012] A further feature of this application is that the partition mechanism includes a push plate and a baffle. The same push plate is slidably installed on the inner wall of the top and the inner wall of the bottom of the functional box. A baffle is fixedly installed on the inner side of the push plate, and the other end of the baffle extends to the outer side of the functional box.

[0013] By adopting the above technical solution and setting up a baffle mechanism, the baffles in the two functional boxes extend out to form a physical barrier between the stationary contact and the moving contact. This can enhance the insulation strength after the circuit breaker is opened, effectively prevent the arc from reigniting or the moving and stationary contacts from accidentally contacting each other due to external factors such as vibration, and ensure the stable and reliable opening state.

[0014] A further feature of this application is that an eccentric wheel is fixedly sleeved on the rotating shaft, the eccentric wheel is located inside the functional box, and the eccentric wheel is adapted to the push plate.

[0015] By adopting the above technical solution and by setting an eccentric wheel, the eccentric wheel can push the push plate to move inward, thereby achieving the purpose of moving the baffle out of the function box.

[0016] A further feature of this application is that a first spring is fixedly installed on the top right side of the rocker, and the top end of the first spring is fixedly connected to the inner wall of the top of the mechanism box.

[0017] By adopting the above technical solution, and by setting a first spring, the first spring can drive the rocker to reset through the rebound force, thereby achieving the purpose of driving the moving contact rod to reset upward through the rotating seat.

[0018] A further feature of this application is that a second spring is fixedly installed on the inner side of the push plate, and the other end of the second spring is fixedly connected to the inner wall of the function box near the stationary contact rod.

[0019] By adopting the above technical solution, and by setting a second spring, the second spring can drive the push plate and the baffle to reset through the rebound force.

[0020] The beneficial effects of this application are:

[0021] (1) Through the cooperation of the capacitor energy storage unit, electromagnetic repulsion coil, metal repulsion disk, rocker and rotating seat, when the track circuit detects a short circuit fault or receives a trip command, the control module immediately starts the trip program, triggers the capacitor energy storage unit to release a strong current to the electromagnetic repulsion coil, the electromagnetic repulsion coil instantly generates a strong magnetic field, generates an upward electromagnetic repulsion force on the metal repulsion disk at the bottom of the rocker, pushes the rocker to rotate rapidly clockwise around the rotating rod, and drives the moving contact rod to slide downward through the rotating seat, so that the moving contact and the stationary contact can be quickly separated, which can achieve the purpose of quickly cutting off the fault circuit, isolating the fault, and avoiding the fault from expanding and affecting the safe operation of the track circuit;

[0022] (2) Through the cooperation of T-plate, rack plate, gear, eccentric wheel, push plate and baffle, when the moving contact rod moves downward, it can drive the eccentric wheel to rotate, which can push the baffle to extend out of the function box. After the baffles in the two function boxes extend out, they form a physical barrier between the stationary contact and the moving contact, which can enhance the insulation strength after the circuit breaker is opened, effectively prevent the arc from reigniting or the moving and stationary contacts from accidentally contacting each other due to external factors such as vibration, and ensure the stable and reliable opening state. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural schematic diagram of a fast tripping mechanism for a track vacuum circuit breaker according to this application;

[0025] Figure 2 This is a schematic diagram of the internal structure of the mechanism box of a fast tripping mechanism for a track vacuum circuit breaker according to this application;

[0026] Figure 3 This is a schematic diagram of the internal structure of the arc-extinguishing chamber of a fast tripping mechanism for a track vacuum circuit breaker according to this application;

[0027] Figure 4 This is a schematic diagram of the internal structure of the functional box of a fast tripping mechanism for a track vacuum circuit breaker according to this application.

[0028] In the diagram: 1. Mechanism box; 2. Arc extinguishing chamber; 201. Stationary contact rod; 202. Moving contact rod; 203. Stationary contact; 204. Moving contact; 3. Control module; 4. Rotating rod; 401. Rocker; 402. Rotating seat; 403. First spring; 5. Capacitor energy storage unit; 501. Electromagnetic repulsion coil; 502. Metal repulsion disk; 6. Function box; 601. Rotating shaft; 602. Eccentric wheel; 7. T-shaped plate; 701. Rack plate; 702. Gear; 8. Push plate; 801. Baffle; 802. Second spring. Detailed Implementation

[0029] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] See Figures 1-4 This application provides a fast tripping mechanism for a track vacuum circuit breaker, including a mechanism box 1. An arc-extinguishing chamber 2 is fixedly installed on the top of the mechanism box 1. The same rotating rod 4 is rotatably installed on the front and rear inner walls of the mechanism box 1. A rocker arm 401 is rotatably installed on the rotating rod 4. A control module 3 is provided on the top inner wall of the mechanism box 1. A capacitor energy storage unit 5 is provided on the bottom inner wall of the mechanism box 1. The capacitor energy storage unit 5 is electrically connected to the control module 3. An electromagnetic mechanism is provided between the mechanism box 1 and the rocker arm 401. A stationary contact rod 201 is provided on the top inner wall of the arc-extinguishing chamber 2. A stationary contact 203 is provided at the bottom end of the stationary contact rod 201. A movable contact rod 202 is slidably installed on the inner wall of the bottom of the arc-extinguishing chamber 2. The bottom end of the movable contact rod 202 extends into the mechanism box 1. A movable contact 204 is provided at the top end of the movable contact rod 202. Functional boxes 6 are fixedly installed on both inner walls of the arc-extinguishing chamber 2. A rotating shaft 601 is rotatably installed on the inner wall of the rear side of the functional box 6. The front end of the rotating shaft 601 extends to the outside of the functional box 6. A T-shaped plate 7 is fixedly sleeved on the movable contact rod 202. A gear mechanism is provided between the T-shaped plate 7 and the rotating shaft 601. A baffle mechanism is provided inside the functional box 6.

[0031] Specifically, the electromagnetic mechanism includes an electromagnetic repulsion coil 501 and a metal repulsion disk 502. The electromagnetic repulsion coil 501 is provided on the inner wall of the bottom of the mechanism box 1. The electromagnetic repulsion coil 501 is located on the right side of the capacitor energy storage unit 5 and is electrically connected to the capacitor energy storage unit 5. The metal repulsion disk 502 is provided on the right side of the bottom of the rocker 401. The electromagnetic repulsion coil 501 and the metal repulsion disk 502 are compatible.

[0032] Specifically, a rotating seat 402 is fixedly installed at the bottom of the movable contact rod 202, and the rotating seat 402 is rotatably connected to the left end of the rocker 401.

[0033] Specifically, the gear mechanism includes a rack plate 701 and a gear 702. The rack plate 701 is fixedly installed at both ends of the T-shaped plate 7, and the gear 702 is fixedly sleeved at the front end of the rotating shaft 601. The rack plate 701 and the corresponding gear 702 are adapted to each other.

[0034] Specifically, the partition mechanism includes a push plate 8 and a baffle 801. The same push plate 8 is slidably installed on the inner wall of the top and the inner wall of the bottom of the function box 6. A baffle 801 is fixedly installed on the inner side of the push plate 8, and the other end of the baffle 801 extends to the outer side of the function box 6.

[0035] Specifically, an eccentric wheel 602 is fixedly sleeved on the rotating shaft 601. The eccentric wheel 602 is located inside the function box 6 and is adapted to the push plate 8.

[0036] Specifically, a first spring 403 is fixedly installed on the top right side of the rocker 401, and the top of the first spring 403 is fixedly connected to the inner wall of the top of the mechanism box 1.

[0037] Specifically, a second spring 802 is fixedly installed on the inner side of the push plate 8, and the other end of the second spring 802 is fixedly connected to the inner wall of the function box 6 near the stationary contact rod 201.

[0038] In this application, when the track circuit detects a short circuit fault or receives a tripping command, the control module 3 immediately initiates the tripping procedure, triggering the capacitor energy storage unit 5 to release a strong current to the electromagnetic repulsion coil 501. The electromagnetic repulsion coil 501 instantly generates a strong magnetic field, producing an upward electromagnetic repulsion force on the metal repulsion disk 502 at the bottom of the rocker 401, pushing the rocker 401 to rotate rapidly clockwise around the rotating rod 4. Through the rotating seat 402, the moving contact rod 202 slides downward along the bottom inner wall of the arc-extinguishing chamber 2, causing the moving contact 204 to quickly separate from the stationary contact 203. This achieves the purpose of quickly cutting off the fault circuit, isolating the fault, and preventing the fault from expanding and affecting the safe operation of the track circuit. During the downward movement of the moving contact rod 202, the T-shaped plate 7 fixed on its outer side moves downward synchronously. The rack plates 701 at both ends of the T-shaped plate 7 mesh with the gears 702 on the outer side of the function box 6, driving the rotating shaft 601 to rotate. The eccentric wheel 602 on the rotating shaft 601 rotates with it and squeezes the push plate. 8. The push plate 8 overcomes the tension of the second spring 802 and slides inward, thereby pushing the baffle 801 out of the function box 6. After the baffles 801 in the two function boxes 6 extend out, they form a physical barrier between the stationary contact 203 and the moving contact 204, which can enhance the insulation strength after the circuit breaker is opened, effectively prevent the arc from reigniting or the moving and stationary contacts from accidentally contacting each other due to external factors such as vibration, and ensure the stable and reliable opening state. When the fault is eliminated, the capacitor energy storage unit 5 no longer releases strong current to the electromagnetic repulsion coil 501, the electromagnetic repulsion disappears, and under the action of the reset force of the first spring 403, the rocker plate 401 rotates counterclockwise, driving the moving contact rod 202 and the T-shaped plate 7 to move up and reset. The rack plate 701 and the gear 702 drive in the opposite direction to reset the rotating shaft 601 and the eccentric wheel 602. Under the action of the tension of the second spring 802, the push plate 8 drives the baffle 801 to retract into the function box 6, and the entire mechanism returns to the initial standby state, waiting for the next opening command.

Claims

1. A fast tripping mechanism for a track vacuum circuit breaker, characterized in that, The system includes a mechanism box (1), an arc-extinguishing chamber (2) is fixedly installed on the top of the mechanism box (1), the same rotating rod (4) is rotatably installed on the front inner wall and the rear inner wall of the mechanism box (1), a rocker (401) is rotatably installed on the rotating rod (4), a control module (3) is provided on the top inner wall of the mechanism box (1), a capacitor energy storage unit (5) is provided on the bottom inner wall of the mechanism box (1), the capacitor energy storage unit (5) is electrically connected to the control module (3), and an electromagnetic mechanism is provided between the mechanism box (1) and the rocker (401). A stationary contact rod (201) is provided on the top inner wall of the arc-extinguishing chamber (2), and a stationary contact (203) is provided at the bottom end of the stationary contact rod (201). A movable contact rod (202) is slidably installed on the bottom inner wall of the arc-extinguishing chamber (2), and the bottom end of the movable contact rod (202) extends into the mechanism box (1). A movable contact (204) is provided at the top end of the movable contact rod (202). Functional boxes (6) are fixedly installed on both sides of the inner wall of the arc-extinguishing chamber (2). A rotating shaft (601) is rotatably installed on the rear inner wall of the functional box (6). The front end of the rotating shaft (601) extends to the outside of the functional box (6). A T-shaped plate (7) is fixedly sleeved on the movable contact rod (202). A gear mechanism is provided between the T-shaped plate (7) and the rotating shaft (601). A baffle mechanism is provided inside the functional box (6).

2. The fast tripping mechanism for a track vacuum circuit breaker according to claim 1, characterized in that: The electromagnetic mechanism includes an electromagnetic repulsion coil (501) and a metal repulsion disk (502). The electromagnetic repulsion coil (501) is provided on the inner wall of the bottom of the mechanism box (1). The electromagnetic repulsion coil (501) is located on the right side of the capacitor energy storage unit (5). The electromagnetic repulsion coil (501) is electrically connected to the capacitor energy storage unit (5). The metal repulsion disk (502) is provided on the right side of the bottom of the rocker (401). The electromagnetic repulsion coil (501) and the metal repulsion disk (502) are compatible.

3. The fast tripping mechanism for a track vacuum circuit breaker according to claim 1, characterized in that: The bottom end of the movable contact rod (202) is fixedly installed with a rotating seat (402), and the rotating seat (402) is rotatably connected to the left end of the rocker (401).

4. The fast tripping mechanism for a track vacuum circuit breaker according to claim 1, characterized in that: The gear mechanism includes a rack plate (701) and a gear (702). The rack plate (7) is fixedly installed at both ends. The gear (702) is fixedly sleeved at the front end of the rotating shaft (601). The rack plate (701) and the corresponding gear (702) are adapted to each other.

5. A fast tripping mechanism for a track vacuum circuit breaker according to claim 1, characterized in that: The partition mechanism includes a push plate (8) and a baffle (801). The same push plate (8) is slidably installed on the inner wall of the top and the inner wall of the bottom of the functional box (6). The baffle (801) is fixedly installed on the inner side of the push plate (8). The other end of the baffle (801) extends to the outside of the functional box (6).

6. A fast tripping mechanism for a track vacuum circuit breaker according to claim 1, characterized in that: An eccentric wheel (602) is fixedly sleeved on the rotating shaft (601). The eccentric wheel (602) is located inside the function box (6) and is adapted to the push plate (8).

7. A fast tripping mechanism for a track vacuum circuit breaker according to claim 3, characterized in that: A first spring (403) is fixedly installed on the top right side of the rocker (401), and the top end of the first spring (403) is fixedly connected to the top inner wall of the mechanism box (1).

8. A fast tripping mechanism for a track vacuum circuit breaker according to claim 5, characterized in that: A second spring (802) is fixedly installed on the inner side of the push plate (8), and the other end of the second spring (802) is fixedly connected to the inner wall of the function box (6) near the stationary contact rod (201).

Images