Special opening pinch plate with load sensor for circuit breaker

Abstract

A special opening pinch plate with a load sensor for a circuit breaker comprises a main body and a sensor, the main body is provided with a first segmentation thin groove and a fixing hole, the main body is segmented into a stress area and a strain area by the first segmentation thin groove, the stress area is adjacent to the strain area, the fixing hole is arranged in the strain area, and the sensor is arranged in the fixing hole. The stress area is used for being connected with a closing maintaining shaft in the circuit breaker mechanism in an abutting mode, and the stress area slightly deforms towards the strain area when stressed. According to the utility model, the main body is divided into a stress area and a strain area by the first dividing thin groove; when the circuit breaker acts, the closing maintaining shaft abuts against the stress area, and force is effectively transmitted to the strain area in a concentrated mode through the thin groove. The strain area is stressed and deformed to generate a micro-strain signal, the sensor senses the signal to obtain buckling force information, the buckling force can be accurately detected in real time by measuring the micro-strain, whether the buckling force is normal or not can be judged in time, early warning or fault prevention is conducted in advance, and operation safety and reliability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a special opening buckle plate for circuit breakers with a load sensor. Background Art

[0002] The opening and closing of high-voltage circuit breakers rely on the operating mechanism to provide a large amount of power, and most of them adopt an energy storage + tripping structure. When closing, the energy is stored electrically or manually, the closing spring is stretched, and the potential energy is stored by the tripping mechanism. After pressing the closing button (or the coil is energized to push the button), the snap-on parts are gently pushed open to release the potential energy to close the circuit, and at the same time, the opening spring is driven to store energy and is buckled by the opening tripping mechanism. The opening operation is similar to the closing operation, and the opening snap-on parts can be gently pushed open.

[0003] However, the disconnecting parts are subjected to large stress for a long time, and improper relay force will cause the operating mechanism to open incorrectly, close incorrectly, refuse to open, or refuse to close. If the relay force is insufficient, it is easy to trip due to vibration, and the circuit breaker cannot be maintained after closing and opens; if the relay force is too large, the coil cannot trip when it is actuated, resulting in refusal to open or close. In addition, some existing online monitoring products for circuit breaker mechanisms use angle and linear sensors to monitor the movement process, which has the following defects: it can only be monitored when the mechanism is in action, and the circuit breaker cannot be opened or closed when it is energized or in hot standby, and monitoring requires power outage; and the monitoring data is limited to movement parameters such as speed and time, and it is impossible to monitor the relay force parameters during action.

[0004] In summary, in order to solve the fault monitoring problem related to the relay force of the opening brake connection components, it is necessary to optimize the existing mechanism to achieve real-time monitoring of the opening brake connection components. Utility Model Content

[0005] The utility model aims to provide a circuit breaker special opening buckle plate with a load sensor, which solves the problem that the above-mentioned opening buckle plate cannot monitor the buckle relay force in real time.

[0006] To achieve the above-mentioned purpose, the utility model provides a circuit breaker special disconnecting buckle plate with a load sensor, including a main body and a sensor, the main body is provided with a first dividing groove and a fixing hole, the first dividing groove divides the main body into a force-bearing zone and a strain zone, the force-bearing zone is adjacent to the strain zone, the fixing hole is arranged in the strain zone, the sensor is arranged in the fixing hole, the force-bearing zone is used to be connected to the closing holding shaft in the circuit breaker mechanism, and the force-bearing zone will be slightly deformed toward the strain zone when subjected to force.

[0007] Preferably, the main body is further provided with a second dividing groove, which is vertically arranged to the first dividing groove and isolated from each other.

[0008] Preferably, the sensor is a resistance strain gauge sensor.

[0009] Preferably, the second dividing groove extends to a position adjacent to the fixing hole.

[0010] Preferably, the main body further comprises a third dividing groove, and the third dividing groove is vertically arranged with respect to one end of the second dividing groove close to the fixing hole and the two are connected with each other.

[0011] Preferably, the main body is also provided with a wiring groove and a wire outlet hole, one end of the wiring groove is connected to the fixing hole, and the other end is connected to the wire outlet hole, the wiring groove is used to place the sensor transmission line, and the wire outlet hole is used to place the sensor outlet cable.

[0012] Preferably, the main body is provided with a rotating shaft hole and an extension block, the rotating shaft hole is used to fix the rotating shaft in the circuit breaker mechanism, and the extension block is used to be fixedly connected to the opening latch in the circuit breaker mechanism.

[0013] Beneficial effects of the utility model:

[0014] The first dividing groove of the utility model divides the main body into a stress zone and a strain zone. When the circuit breaker is actuated, the closing holding shaft presses against the stress zone, and the force is effectively and centrally transmitted to the strain zone through the groove to avoid dispersion loss. The stress deformation of the strain zone generates a micro-strain signal, and the sensor senses the signal to obtain the relay force information. By measuring the micro-strain, the relay force can be accurately detected in real time, and it can be judged whether it is normal in time, and early warning or prevention of faults can be given, thereby improving operational safety and reliability. In addition, the way the sensor is embedded in the fixing hole can protect the sensor from damage by external factors, and can also provide positioning for installation to ensure accurate measurement of the relay force. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the main body of the utility model.

[0018] Figure 3 It is a partial display diagram of the position of the utility model in the circuit breaker mechanism.

[0019] In the figure: main body 1; first dividing groove 11; fixing hole 12; force-bearing area 13; strain area 14; second dividing groove 15; third dividing groove 16; wiring groove 17; outlet hole 18; shaft hole 19; extension block 10; sensor 2. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0021] like Figure 1 , Figure 2 As shown, a circuit breaker special opening plate with a load sensor 2 includes a main body 1 and a sensor 2. The main body 1 is provided with a first dividing groove 11 and a fixing hole 12. The first dividing groove 11 divides the main body 1 into a force-bearing area 13 and a strain area 14. The force-bearing area 13 is adjacent to the strain area 14. The fixing hole 12 is arranged in the strain area 14. The sensor is arranged in the fixing hole 12. The force-bearing area 13 is used to abut against the closing holding shaft in the circuit breaker mechanism. The force-bearing area 13 will slightly deform toward the strain area 14 when it is stressed. The utility model can divide the main body 1 into two sensing areas: the force-bearing area 13 and the strain area 14 through the first dividing groove 11. During the operation of the circuit breaker, when the closing holding shaft abuts against the force-bearing area 13 of the opening plate, the closing holding shaft will squeeze the force-bearing area 13 due to the action force. Under the transmission of force, the strain area 14 will deform due to the force. The fine groove ensures that the force-bearing area 13 can be more concentrated and effectively transmitted to the strain area 14 after being subjected to the extrusion force, avoiding excessive dispersion and loss of force during the transmission process. The deformation of the strain area 14 will generate a micro-strain signal, and the sensor can keenly sense this micro-strain signal. Based on the micro-strain signal sensed by the sensor, the buckle relay information between the force-bearing area 13 and the closing holding shaft can be obtained. Because the magnitude of the buckle relay force is directly related to the degree of deformation of the strain area 14, by accurately measuring the micro-strain of the strain area 14, the real-time and accurate detection of the buckle relay force can be achieved, and then it can be timely discovered whether the buckle relay force is in the normal range, so as to give early warning or take measures to avoid the occurrence of these faults, greatly improving the safety and reliability of the high-voltage circuit breaker operation. In addition, by embedding the sensor 2 through the fixing hole 12, the sensor 2 can be protected to prevent the sensor 2 from being damaged by external factors (friction, collision, etc.), and at the same time, it can also provide a clear positioning for the installation of the sensor 2, which is conducive to high-quality installation after the accurate calculation of the position of the sensor 2, ensuring that the sensor 2 can accurately measure the buckle relay force.

[0022] Specifically, the sensor 2 of the utility model is a resistance strain gauge sensor 2. In practical applications, the resistance strain gauge sensor has high precision and a wide measurement range, which ensures that during the operation of the circuit breaker, the buckle relay information between the force area 13 and the closing holding shaft can be accurately obtained, providing accurate data support for the stable operation of the entire system; and it can ensure that under the frequent opening and closing operations of the circuit breaker, there will be no inaccurate measurements or failures due to the passage of time or the increase in the number of operations, thereby ensuring the long-term effectiveness of the entire circuit breaker monitoring system. In addition, the resistance strain gauge sensor 2 has a simple structure, small size, and light weight. The present application uses the resistance strain gauge sensor 2, which does not require a complicated installation procedure and additional space requirements, does not impose an additional burden on the overall structure of the opening buckle plate, does not affect the normal operation of the circuit breaker, and is conducive to the miniaturized design of the entire circuit breaker device. The resistance strain gauge sensor of the utility model is designed in full bridge according to the Wheatstone bridge law.

[0023] Furthermore, the main body 1 is provided with a second dividing groove 15, which is arranged perpendicular to the first dividing groove 11 and the two are isolated from each other. The utility model further changes the force structure of the force-bearing zone 13 through the second dividing groove 15. The first dividing groove 11 divides the main body 1 into the force-bearing zone 13 and the strain zone 14, and the second dividing groove 15, on this basis, enables the force-bearing zone 13 to be connected to the strain zone 14 only at one end, forming a "cantilever" structure. When subjected to force, the point of action and support of the force is at the end connected to the strain zone 14, which can make the force-bearing zone 13 deform under a smaller force, effectively reducing the force that causes the force zone 13 to deform.

[0024] Furthermore, the second segmented groove 15 of the utility model extends to the vicinity of the fixing hole 12, which can optimize the force transmission path. When the force-bearing area 13 is subjected to extrusion force, the force can be transmitted to the strain area 14 more directly and efficiently along the second segmented groove 15, and then transmitted to the sensor 2 near the fixing hole 12. In this way, the loss and dispersion of force in the transmission process can be reduced, and the sensor 2 can more accurately sense the slight deformation of the force-bearing area 13, thereby improving the measurement accuracy of parameters such as the buckle relay force.

[0025] Furthermore, the main body 1 of the present application further includes a third segmented groove 16, which is vertically arranged at one end of the second segmented groove 15 near the fixing hole 12 and the two are connected to each other. When the force-bearing area 13 is acted upon by an external force, the force is transmitted along the segmented groove. The presence of the third segmented groove 16 enables the force to have a clearer conduction direction when it reaches the part of the second segmented groove 15 near the fixing hole 12 in the strain area 14, further guiding the force to converge near the fixing hole 12, which helps to improve the sensor 2's efficiency in sensing force.

[0026] The main body 1 is also provided with a wiring groove 17 and a wire outlet hole 18. One end of the wiring groove 17 is connected to the fixing hole 12, and the other end is connected to the wire outlet hole. The wiring groove 17 is used to place the transmission line of the sensor 2, and the wire outlet hole 18 is used to place the outlet cable of the sensor 2. The wiring groove 17 of the utility model can play a certain protective role on the cable, prevent the cable from being physically damaged and corroded by the outside world, and extend the service life of the cable. In addition, through the cooperation of the wiring groove 17 and the wire outlet hole 18, the cable can be fixed in a specific position to prevent the cable from loosening and shifting due to shaking, vibration and other reasons during the operation of the equipment, thereby affecting the normal operation of the sensor 2. In addition, the gap in the wiring groove 17 can also be sealed with silicone to further fix the cable.

[0027] See also Figure 2 , Figure 3 The main body 1 of the present application is provided with a shaft hole 19 and an extension block 10, and the shaft hole 19 is used to fix the shaft in the circuit breaker mechanism ( Figure 3 The extension block 10 is used to connect with the opening latch (indicated by the arrow A in the middle) in the circuit breaker mechanism. Figure 3 The utility model is fixedly connected with the rotating shaft through the rotating shaft hole 19, and the rotating shaft in the circuit breaker tripping mechanism is used to provide a torque for rotation, and the tripping buckle plate needs to be against the tripping holding shaft and maintain a balanced state. Therefore, when the tripping is driven manually or by electromagnetic induction, the tripping buckle plate is separated from the tripping holding shaft and rotates under the action of the rotating shaft, and then the output end of the tripping mechanism is driven to achieve the tripping. The extension block 10 is used to be fixedly connected with the tripping catch in the circuit breaker mechanism, and the tripping catch is firmly installed on the main body 1, so that the tripping catch can play its due role in the circuit breaker mechanism, and at the same time, the connection strength and overall structural strength between the main body 1 and the tripping catch are enhanced to a certain extent, ensuring the stability of the tripping mechanism, so that the circuit breaker mechanism can maintain structural stability and reliability when subjected to a large tripping force or other external forces, and prevent circuit breaker failure caused by looseness or damage of the connection parts.

[0028] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A circuit breaker special opening plate with a load sensor, characterized in that: The invention comprises a main body (1) and a sensor (2), wherein the main body (1) is provided with a first dividing groove (11) and a fixing hole (12), wherein the first dividing groove (11) divides the main body (1) into a force-bearing area (13) and a strain area (14), wherein the force-bearing area (13) is adjacent to the strain area (14), the fixing hole (12) is arranged in the strain area (14), and the sensor (2) is arranged in the fixing hole (12), wherein the force-bearing area (13) is used to abut against a closing holding shaft in a circuit breaker mechanism, and the force on the force-bearing area (13) will cause a micro-deformation exceeding that of the strain area (14).

2. A circuit breaker special opening plate with a load sensor as claimed in claim 1, characterized in that: The sensor (2) is a resistance strain gauge sensor.

3. A circuit breaker special opening plate with a load sensor as claimed in claim 1, characterized in that: The main body (1) is also provided with a second dividing groove (15), the second dividing groove (15) being arranged vertically with the first dividing groove (11) and being isolated from each other.

4. A circuit breaker special opening plate with a load sensor as claimed in claim 3, characterized in that: The second dividing groove (15) extends to a position adjacent to the fixing hole (12).

5. A circuit breaker special opening plate with a load sensor as claimed in claim 4, characterized in that: The main body (1) further comprises a third dividing groove (16), wherein the third dividing groove (16) and the second dividing groove (15) are arranged perpendicularly to one end thereof close to the fixing hole (12), and the two are connected to each other.

6. A circuit breaker special opening plate with a load sensor as claimed in claim 1, characterized in that: The main body (1) is also provided with a wiring groove (17) and a wire outlet hole (18); one end of the wiring groove (17) is connected to the fixing hole (12), and the other end is connected to the wire outlet hole (18); the wiring groove (17) is used to place the transmission line of the sensor (2), and the wire outlet hole (18) is used to place the outlet cable of the sensor (2).

7. A circuit breaker special opening plate with a load sensor as claimed in claim 1, characterized in that: The main body (1) is provided with a rotating shaft hole (19) and an extension block (10); the rotating shaft hole (19) is used to fix the rotating shaft in the circuit breaker mechanism; and the extension block (10) is used to be fixedly connected to a tripping latch in the circuit breaker mechanism.

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