An adaptive mechanical tripping device for a draw-out circuit breaker

Abstract

An adaptive mechanical tripping device for a trolley circuit breaker of the present invention includes a housing, a power supply and a control terminal are arranged inside the housing, an adsorption device is arranged at one end of the housing, and the adsorption device can be adsorbed on the surface of the circuit breaker to be tripped; an electric push rod, the electric push rod is slidably connected inside the housing, and its telescopic rod can extend out of the housing to push the tripping button to be tripped; a pressure sensor, the pressure sensor is fixedly connected inside the housing, and the tail end of the electric push rod abuts against the pressure detection surface of the pressure sensor; the control terminal is electrically connected to the power supply, and the pressure sensor and the electric push rod are both electrically connected to the control terminal.

Description

Technical Field

[0001] The present invention relates to the field of power equipment, and particularly relates to a self - adaptive mechanical tripping device for a draw - out circuit breaker. Background Art

[0002] A draw - out circuit breaker is an important power equipment for distributing electric energy in a substation. Whether it can operate normally for outage and restoration is related to the normal power consumption of enterprises and residents. At present, in the substation, draw - out circuit breakers often have problems such as coil burnout, loose wiring, and misalignment of related contacts, resulting in the failure of the tripping circuit to conduct normally and causing a tripping failure.

[0003] There are two ways to trip a circuit breaker. One is circuit tripping, and the other is mechanical tripping by pressing the tripping button on the circuit breaker panel. When the circuit tripping is abnormal, only mechanical tripping can be used. However, since the circuit breaker is energized during operation, for a 10KV high - voltage line, mechanical tripping has a certain risk (once there is a leakage of the electrode, it is easy to cause life - threatening). To prevent personal accidents, according to the relevant requirements of power operation operating procedures and power equipment safety control, equipment maintenance personnel are prohibited from performing circuit breaker tripping and closing operations on the draw - out circuit breaker panel. Therefore, when a running draw - out circuit breaker has a tripping failure such as a control circuit disconnection, it is often necessary to transfer the load, stop the bus, or disconnect the upstream power supply, and then manually operate the mechanical tripping button on the draw - out circuit breaker panel to achieve mechanical tripping of the draw - out circuit breaker. This method expands the power outage range and seriously affects the production and living electricity consumption of enterprises and residents. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a self - adaptive mechanical tripping device for a draw - out circuit breaker, which can pre - install the tripping device at the tripping button of the draw - out circuit breaker, align the telescopic rod of the electric push rod with the tripping button. Once manual power - off is required, the tripping device can be directly started, avoiding the danger of direct manual tripping by operators.

[0005] The present invention is realized through the following technical solutions:

[0006] A self - adaptive mechanical tripping device for a draw - out circuit breaker includes,

[0007] A housing, in which a power supply and a control terminal are provided. One end of the housing is provided with an adsorption device, and the adsorption device can adsorb on the surface of the circuit breaker to be tripped;

[0008] An electric push rod, which is slidably connected in the housing, and its telescopic rod can extend out of the housing to push the tripping button;

[0009] A pressure sensor, which is fixedly connected in the housing, and the tail end of the electric push rod abuts against the pressure detection surface of the pressure sensor;

[0010] The control end is electrically connected to the power supply, and the pressure sensor and the electric push rod are both electrically connected to the control end.

[0011] Further, a bushing is further included. The outer wall of the bushing is fixedly connected to the inside of the housing, and the sleeve wall of the electric push rod passes through the bushing and is slidably connected thereto.

[0012] Further, the adsorption device is a neodymium iron boron circular magnet, which is fixedly connected to the housing through a connecting column, and the electric push rod is coaxially arranged with the adsorption device.

[0013] Further, a limit ring is provided on the outer wall of the sleeve of the electric push rod. The position of the limit ring is fixedly connected to the electric push rod in an adjustable manner. When the opening device is not working, the end surface of the limit ring away from the pressure sensor abuts against the limit stop column inside the housing, and the tail end of the electric push rod abuts against the pressure detection surface of the pressure sensor.

[0014] Further, a threaded through hole is provided in the radial direction of the limit ring, and the tightening bolt is threadedly connected to the threaded through hole and then abuts against the outer wall of the sleeve of the electric push rod.

[0015] Further, an axially arranged limit rod is fixedly connected to the end surface of the limit ring away from the pressure sensor. The limit stop column is provided with a limit hole having the same diameter as the limit rod in the axial direction. The length of the limit rod is less than the depth of the limit hole, and the limit rod is inserted into the limit hole.

[0016] Further, a switch is fixedly connected to the outer wall of the housing, and the switch is electrically connected between the power supply and the control end.

[0017] Further, the control end is also signal-connected to a remote controller.

[0018] The beneficial effects of the present invention are as follows;

[0019] I. The present invention is provided with a housing, and an adsorption device is arranged at one end of the housing, so that the whole device can be adsorbed on the surface of the circuit breaker in the open position. By aligning the telescopic rod of the electric push rod arranged in the housing with the opening button, and controlling the telescopic rod of the electric push rod to extend through the control end. When the end of the telescopic rod abuts against the opening button, the reaction force of the opening button acts on the electric push rod. Since the electric push rod is slidably connected to the housing, the end of the electric push rod presses the pressure sensor, and the pressure sensor transmits the force condition to the control end. Since there is a catch inside the opening button, a relatively large force is required to unhook the catch, and little force is required after tripping. Then the pressure sensor transmits the force condition of the electric push rod to the control end, and the control end detects the force condition. Once it detects that the pressure suddenly decreases, it stops the telescopic rod of the electric push rod from advancing and controls it to retract to its original position. This can prevent the telescopic rod from extending too far into the button and damaging the button, and is applicable to handcart circuit breakers of different brands and adapts to different opening buttons (the pressing depths of opening buttons of different brands are inconsistent).

[0020] II. The present invention fixes the position of the electric push rod by slidably connecting the electric push rod to the bushing through the bushing, avoiding displacement and affecting the use effect.

[0021] III. The adsorption device of the present invention is set as a neodymium iron boron circular magnet, which has strong magnetism to ensure that the opening device is adsorbed on the iron door of the circuit breaker in the open position, and is not easy to displace, which is simple and practical.

[0022] IV. The present invention effectively fixes the electric push rod through the cooperation of the limit ring and the limit stop post, avoiding unnecessary displacement.

[0023] V. The present invention can easily adjust the installation position of the limit ring according to needs by setting a tightening bolt on the limit ring.

[0024] VI. The present invention can effectively prevent the electric push rod from rotating through the cooperation of the limit hole and the limit rod.

[0025] VII. The present invention can conveniently control the entire circuit by setting a switch, and at the same time prevent accidents from occurring and being unable to be controlled.

[0026] VIII. The present invention can be conveniently remotely controlled at a distance by setting a remote controller to be wirelessly connected to the control end. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the internal structure of the present invention.

[0028] Figure 2 It is a schematic diagram of the front structure.

[0029] Figure 3 Schematic diagram of the connection structure of the present invention. Specific implementation mode

[0030] The present invention will be introduced in detail below with reference to the accompanying drawings.

[0031] Implementation mode:

[0032] As Figures 1 to 3 , this implementation mode provides an adaptive mechanical tripping device for a handcart circuit breaker, including

[0033] A housing 10, in which a power supply 40 and a control terminal 50 are provided. One end of the housing 10 is provided with an adsorption device 101, and the adsorption device 101 can be adsorbed on the surface of the circuit breaker to be tripped;

[0034] An electric push rod 20, which is slidably connected in the housing 10, and its telescopic rod can extend out of the housing 10 to push the button to be tripped;

[0035] A pressure sensor 30, which is fixedly connected in the housing 10, and the tail end of the electric push rod 20 abuts against the pressure detection surface of the pressure sensor 30;

[0036] The control terminal 50 is electrically connected to the power supply 40, and the pressure sensor 30 and the electric push rod 20 are both electrically connected to the control terminal 50.

[0037] Specifically, in this device, an electric push rod 20 is coaxially installed inside a cylindrical housing 10 (made of insulating material), and a power supply 40 and a control terminal 50 are provided. The electric push rod 20 is controlled through the control terminal 50, and its telescopic rod extends out of the housing 10 to push the opening button. In order to enable the electric push rod 20 to retract immediately after the opening operation is achieved, the electric push rod 20 is slidably connected to the housing 10. At the same time, a pressure sensor 30 is provided at the tail end of the electric push rod 20, and the tail end of the electric push rod 20 abuts against the pressure detection surface of the pressure sensor 30. The operation of the electric push rod 20 is divided into three stages. In the first stage, the telescopic rod of the electric push rod 20 extends out and does not touch the opening button. At this time, the electric push rod 20 does not squeeze the pressure sensor 30, and the value transmitted by the pressure sensor 30 to the control terminal 50 remains unchanged. The control terminal 50 controls the operation of the electric push rod 20, and its telescopic rod continues to extend. In the second stage, the end of the telescopic rod of the electric push rod 20 abuts against the opening button. When the telescopic rod pushes the opening button, the electric push rod 20 squeezes the pressure sensor 30, and the pressure received by the pressure sensor 30 gradually increases (mainly because the force required to press the opening button becomes larger before tripping). When the control terminal 50 compares and finds that the pressure transmitted by the pressure sensor 30 increases, the electric push rod 20 continues to operate. In the third stage, the opening button trips. At this time, the force on the telescopic rod of the electric push rod 20 suddenly decreases (the pressure pressing the opening button decreases, and the pressing force of the opening button suddenly decreases after tripping). After the control terminal 50 detects the signal change of the pressure sensor 30, the control terminal 50 controls the telescopic rod of the electric push rod 20 to retract by comparing the signals of the electric push rod 20, so as to avoid damaging the opening button. In this way, the opening device can adapt to different opening buttons without adjustment and can be used directly.

[0038] Further, to facilitate the sliding of the electric push rod 20 inside the housing 10, the opening device further includes a bushing 60. The outer wall of the bushing 60 is fixedly connected to the inside of the housing 10, and the sleeve wall of the electric push rod 20 passes through the bushing 60 and is slidably connected thereto. At the same time, to facilitate sliding, balls can be provided on the inner wall of the bushing 60.

[0039] Further, since the opening circuit breaker has an iron door with a relatively large iron content, the adsorption device 101 can be set as a neodymium iron boron circular magnet and fixedly connected to the housing 10 through three connecting columns. The electric push rod 20 and the adsorption device 101 are coaxially arranged.

[0040] To ensure that the electric push rod 20 can maintain a stable position inside the housing 10, a limit ring 201 is provided on the outer wall of the sleeve of the electric push rod 20. The position of the limit ring 201 is adjustably fixedly connected to the electric push rod 20. When the opening device is not working, the end face of the limit ring 201 away from the pressure sensor 30 abuts against the limit stop post 102 inside the housing 10, and the tail end of the electric push rod 20 abuts against the pressure detection surface of the pressure sensor 30.

[0041] To facilitate the adjustment of the installation position of the limit ring 201, the limit ring 201 is provided with a threaded through hole in the radial direction, and the tightening bolt 202 is threadedly connected to the threaded through hole and then presses against the outer wall of the sleeve of the electric push rod 20.

[0042] To prevent the electric push rod 20 from rotating axially in the housing, a limit rod 2011 arranged axially is fixedly connected to the end face of the limit ring 201 away from the pressure sensor 30. The limit stop column 102 is provided with a limit hole 1021 having the same diameter as the limit rod 2011 in the axial direction. The length of the limit rod 2011 is less than the depth of the limit hole 1021, and the limit rod 2011 is inserted into the limit hole 1021.

[0043] To facilitate timely power cut-off, a switch 102 is fixedly connected to the outer wall of the housing 10, and the switch 102 is electrically connected between the power supply 40 and the control end 50. To facilitate remote control over a long distance, the control end 50 is also signal-connected to a remote controller 60. Among them, the power supply 40 can use a 12V lithium battery, the control end 50 can use a 51 single-chip microcomputer and is connected to corresponding control devices (such as a solid-state switch, a wireless signal receiver, etc.) through a PCB board. The electric push rod 20 can use a TA-01-20 pen-type micro electric push rod, and the pressure sensor 30 can use an FA128 pressure sensor.

[0044] The circuit connection method in this embodiment and the program writing in the controller are conventional technologies in the relevant field, and this embodiment does not make any beneficial improvements to them, so no more repetitive elaboration will be made here.

[0045] The above is an embodiment of the present invention. Therefore, all equivalent changes or decorations made according to the structure, features, and principles described in the scope of the application of the present invention are included in the scope of the present invention.

Claims

1. An adaptive mechanical tripping device for a trolley circuit breaker, characterized in that, Comprising a housing (10), within which there is provided a power source (40) and a control terminal (50). One end of the housing (10) is provided with an adsorption device (101), and the adsorption device (101) can be adsorbed on the surface of the circuit breaker to be tripped. An electric push rod (20) is slidably connected within the housing (10), and its telescopic rod can extend out of the housing (10) to push the tripping button. A pressure sensor (30) is fixedly connected within the housing (10), and the tail end of the electric push rod (20) abuts against the pressure detection surface of the pressure sensor (30). The control terminal (50) is electrically connected to the power source (40), and both the pressure sensor (30) and the electric push rod (20) are electrically connected to the control terminal (50). It further includes a bushing (60), the outer wall of the bushing (60) is fixedly connected within the housing (10), the sleeve wall of the electric push rod (20) passes through the bushing (60) and is slidably connected thereto. A limit ring (201) is provided on the outer wall of the sleeve of the electric push rod (20), and the position of the limit ring (201) is adjustably fixedly connected to the electric push rod (20). When the tripping device is not working, the end surface of the limit ring (201) away from the pressure sensor (30) abuts against the limit stop post (102) within the housing (10), and the tail end of the electric push rod (20) abuts against the pressure detection surface of the pressure sensor (30). An axially arranged limit rod (2011) is fixedly connected to the end surface of the limit ring (201) away from the pressure sensor (30). The limit stop post (102) is axially provided with a limit hole (1021) having the same diameter as the limit rod (2011), and the length of the limit rod (2011) is less than the depth of the limit hole (1021). The limit rod (2011) is inserted into the limit hole (1021).

2. The self - adaptive mechanical tripping device for a trolley circuit breaker according to claim 1, characterized in that: The adsorption device (101) is a neodymium iron boron circular magnet, fixedly connected to the housing (10) through a connecting column, and the electric push rod (20) is coaxially arranged with the adsorption device (101).

3. The self - adaptive mechanical opening device for a trolley circuit breaker according to claim 1, characterized in that: The limit ring (201) is provided with a threaded through hole in the radial direction, and a tightening bolt (202) is threadedly connected to the threaded through hole and then abuts against the outer wall of the sleeve of the electric push rod (20).

4. The adaptive mechanical tripping device for a trolley circuit breaker according to claim 1, characterized in that: A switch is fixedly connected to the outer wall of the housing (10), and the switch is electrically connected between the power source (40) and the control terminal (50).

5. The adaptive mechanical opening device for a trolley circuit breaker according to claim 1, wherein: The control terminal (50) is also signal-connected to a remote controller.

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