Intelligent pressure sensing device for circuit breaker

Abstract

The invention relates to an intelligent pressure sensing device for a circuit breaker, and the device can achieve the regular detection of an opening spring, timely discovers the fault and failure of the opening spring, avoids the opening failure of the circuit breaker caused by the failure of the opening spring, is not liable to cause the damage to a circuit detection worker, and especially, is not liable to cause the damage to the circuit detection worker. A relatively sealed environment is formed in the space where the pressure sensor is located, so that the influence of a magnetic field formed by high voltage of the circuit breaker on detection of the pressure sensor is avoided, normal detection of the pressure sensor is not easily influenced, the pressure sensor is not easily influenced by high voltage and high current, inaccurate data detected by the pressure sensor is not easily caused, and the detection accuracy of the circuit breaker is improved. And meanwhile, the control mainboard sends the same data to the processing terminal while sending the detection result to the mobile terminal through the Internet of Things module, and the processing terminal stores and arranges the data, so that electric power maintenance personnel can conveniently carry out maintenance and detection.

Description

Technical Field

[0001] This invention relates to an intelligent pressure sensing device for circuit breakers, and more particularly to an intelligent pressure sensing device for circuit breakers. Background Technology

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions and close, carry, and interrupt current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electrical energy, infrequently start asynchronous motors, and protect power lines and motors. When they experience serious overloads, short circuits, or undervoltage faults, they can automatically disconnect the circuit. Their function is equivalent to a combination of a fuse switch and over / under-temperature relays. Moreover, after interrupting the fault current, it generally does not require replacement of parts. Currently, it has been widely used.

[0003] During the use of circuit breakers, to ensure smooth opening and closing, the opening and closing springs need to be periodically inspected. The traditional approach is to install a pressure sensor at each spring to detect their force. However, due to the special nature of circuit breakers—high-voltage, high-current products—and the sensors being electronic devices, they are susceptible to the effects of high voltage and current, leading to inaccurate data or even sensor failure. This makes it impossible to accurately determine whether the circuit breaker has successfully completed the opening and closing operations, potentially causing misjudgments of the circuit breaker's status. If someone attempts to operate the circuit breaker at this time, it may still be in the closed state, i.e., energized, posing a safety hazard. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an intelligent pressure sensing device for circuit breakers.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An intelligent pressure sensing device for circuit breakers includes a detection tube with a fixed plate fixedly connected to its opening. A pair of fiber grooves are carved into the inner wall of the detection tube. A matching push plate is slidably connected inside the detection tube. The push plate includes a detection plate, and a pair of limiting lugs matching the fiber grooves are fixedly connected to its side wall. A pair of electric push rods are fixedly connected to the fixed plate and located inside the detection tube. A pressure sensor is fixedly connected to the end of each electric push rod away from the fixed plate and contacts the push plate. A positioning rod is inserted into the push plate and passes through it. A tripping spring is sleeved on the outer side of the positioning rod, and one end of the tripping spring is fixedly connected to the push plate. This device allows for the detection of the tripping spring, enabling timely detection of faults and failures, preventing circuit breaker tripping failures due to spring failure, and minimizing the risk of injury to circuit testing personnel.

[0006] The fiber chute is fixedly connected to a dustproof curtain that matches its own size. The dustproof curtain consists of two sets of dustproof rubber strips, and the ends of the two sets of dustproof rubber strips that are far apart from each other are fixedly connected to the opposite side walls of the fiber chute. The dustproof curtain can prevent external debris from entering the fiber chute, thus preventing it from affecting the normal sliding of the push plate and the normal detection of the pressure sensor.

[0007] The dustproof rubber strip is fixedly connected to a dustproof fiber cluster at one end away from the side wall of the fiber chute. This allows the push plate to easily break the dustproof rubber strip without affecting the overall sealing of the dustproof curtain, and does not easily affect the normal sliding of the limiting ear block in the fiber chute, nor does it affect the normal detection of the pressure sensor.

[0008] The dustproof fiber clusters are made of highly elastic fibers, and adjacent dustproof fiber clusters are intertwined and interwoven with each other. The intertwined dustproof fiber clusters form multiple sealed spaces, which can effectively isolate the electromagnetic field generated by the high voltage inside the circuit breaker, reduce the influence of the electromagnetic field generated by the circuit breaker on the pressure sensor, and make it easy to ensure the normal detection of the pressure sensor. The dustproof fiber clusters made of elastic fibers will quickly recover after the external force is removed, so the dustproof fiber clusters are not easily deformed and failed due to the back and forth movement of the limiting lugs in the fiber groove.

[0009] An elastic post is inserted into the dustproof strip, and one end of the elastic post is fixedly connected to the side wall of the fiber groove. The elastic post can effectively increase the strength of the dustproof strip, making it less likely to break along the root under the action of the limiting lug.

[0010] The elastic column sidewall is fixedly connected with reinforcing fibers, which are intersected and embedded in the dustproof strip. The reinforcing fibers can effectively increase the strength of the dustproof strip, making it less prone to surface cracking or breakage.

[0011] A wear-resistant ring is connected between the push plate and the positioning rod, and the wear-resistant ring is fixedly connected to the push plate. Both the wear-resistant ring and the positioning rod are made of hard rubber and have a smooth surface. The presence of the wear-resistant ring can effectively reduce the wear between the push plate and the positioning rod, making it less likely for the push plate to move during the detection process. The positioning rod and wear-resistant ring made of hard rubber can effectively isolate the electromagnetic field formed by the high voltage inside the circuit breaker, reduce the influence of the electromagnetic field formed by the circuit breaker on the pressure sensor, and easily ensure the normal detection of the pressure sensor.

[0012] A smart pressure sensing device for circuit breakers includes a pressure sensor connected to a control motherboard, which is connected to an Internet of Things (IoT) module. The IoT module is connected to a mobile terminal. The control motherboard is embedded in a fixed plate and can send the pressure sensor's detection results to the mobile terminal via the IoT module, facilitating quick testing of the trip spring by the user. The IoT module is also connected to a processing terminal. Simultaneously, the control motherboard sends the detection results to the mobile terminal via the IoT module, and simultaneously sends the same data to the processing terminal for storage and processing, facilitating maintenance and testing by power maintenance personnel.

[0013] A signal connection line is fixedly connected between the fixed plate and the pressure sensor, and one end of the signal connection line passes through the fixed plate and connects to the control main board embedded in the fixed plate. The pressure sensor and the control main board are connected by wire to avoid the influence of external magnetic fields on the signal transmission between the pressure sensor and the control main board.

[0014] A set of limit buckles is fixedly connected to the electric push rod, and the signal connection wires pass through the limit buckles in sequence. The limit buckles can prevent the signal connection wires from becoming tangled and avoid affecting the normal movement of the electric push rod.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: This invention enables regular inspection of the trip spring, allowing for timely detection of faults and failures. This prevents circuit breaker tripping failures caused by trip spring malfunctions and minimizes the risk of injury to circuit testing personnel. Specifically, the relatively sealed environment within the pressure sensor's space prevents the magnetic field generated by the circuit breaker's high voltage from affecting the pressure sensor's detection. This reduces the impact on the pressure sensor's normal operation, making it less susceptible to high voltage and high current, thus reducing the likelihood of inaccurate data and pressure sensor failure. Furthermore, while the control board sends the detection results to the mobile terminal via the IoT module, it also sends the same data to the processing terminal for storage and processing, facilitating maintenance and inspection by power maintenance personnel. Attached Figure Description

[0016] The technical solution of the present invention will be further described below with reference to the accompanying drawings: Appendix Figure 1 An exploded view of the main structure of the circuit breaker pressure sensing device; Appendix Figure 2 This is a front sectional view of the circuit breaker pressure sensing device in standby mode. Appendix Figure 3 This is a front sectional view of the circuit breaker pressure sensing device during testing. Appendix Figure 4 For the appendix Figure 3 Schematic diagram of the structure at point A; Appendix Figure 5 This is a partial structural diagram of the dust curtain; Appendix Figure 6 This is a front sectional view of the dustproof rubber strip; Appendix Figure 7 Schematic diagram of the circuit breaker pressure sensing device The components include: 1. Detection tube; 2. Fixing plate; 3. Limiting slide groove; 4. Push plate; 401. Detection plate; 402. Limiting lug; 5. Dustproof curtain; 501. Dustproof rubber strip; 502. Dustproof fiber cluster; 503. Elastic column; 504. Reinforcing fiber; 6. Electric push rod; 7. Pressure sensor; 8. Positioning rod; 9. Opening spring; 10. Wear-resistant ring; 11. Limit buckle; 12. Signal connection line; 13. Control motherboard; 14. Internet of Things module; 15. Processing terminal; 16. Mobile terminal. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] As attached Figure 1-2The present invention discloses an intelligent pressure sensing device for a circuit breaker, comprising a detection tube 1, one end of which is fixedly connected to the circuit breaker body. A fixing plate 2 is fixedly connected to the opening of the detection tube 1, and the fixing plate 2 is located at the end of the detection tube 1 away from the circuit breaker body. A pair of fiber grooves 3 are carved into the inner wall of the detection tube 1. A push plate 4 matching itself is slidably connected inside the detection tube 1. The push plate 4 includes a detection plate 401. A pair of limiting lugs 402 matching the fiber grooves 3 are fixedly connected to the side wall of the detection plate 401. The push plate 4 achieves limited sliding within the detection tube 1 through the cooperation of the limiting lugs 402 and the fiber grooves 3. The fixing plate 2 is fixed with... A pair of electric push rods 6 are connected, and the electric push rods 6 are located inside the detection tube 1. A pressure sensor 7 is fixedly connected to the end of the electric push rod 6 away from the fixed plate 2, and the pressure sensor 7 is in contact with the push plate 4. A positioning rod 8 is inserted into the push plate 4 and passes through the push plate 4. A tripping spring 9 is sleeved on the outside of the positioning rod 8. One end of the tripping spring 9 is fixedly connected to the push plate 4, and the ends of the positioning rod 8 and the tripping spring 9 away from the push plate 4 are respectively connected to the circuit breaker body. This allows for the detection of the tripping spring 9, timely detection of faults and failures of the tripping spring 9, and avoidance of circuit breaker tripping failure caused by the failure of the tripping spring 9, thus minimizing the risk of injury to circuit testing personnel.

[0019] Please see Figure 1-6A dustproof curtain 5, matching its own design, is fixedly connected to the opening of the fiber chute 3. The dustproof curtain 5 consists of two sets of dustproof rubber strips 501, with the ends of the two sets of dustproof rubber strips 501 respectively fixedly connected to the opposite sidewalls of the fiber chute 3. The dustproof curtain 5 prevents external debris from entering the fiber chute 3, thus minimizing its impact on the normal sliding of the push plate 4 and the normal detection of the pressure sensor 7. A dustproof fiber cluster 502 is fixedly connected to the end of the dustproof rubber strip 501 away from the sidewall of the fiber chute 3. This allows the push plate 4 to easily break through the dustproof rubber strip 501 without affecting the normal sliding of the limiting ear block 402 within the fiber chute 3 and the normal detection of the pressure sensor 7. The dustproof fiber cluster 502 is made of highly elastic fiber. Furthermore, adjacent dustproof fiber clusters 502 are intertwined and interwoven, forming multiple sealed spaces that effectively isolate the electromagnetic field generated by the high voltage inside the circuit breaker, reducing the impact of the electromagnetic field on the pressure sensor 7 and ensuring its normal detection. The dustproof fiber clusters 502, made of elastic fibers, quickly recover after external force is removed, preventing deformation and failure due to the back-and-forth movement of the limiting lugs 402 within the fiber groove 3. An elastic post 503 is inserted into the dustproof strip 501, with one end fixedly connected to the side wall of the fiber groove 3. The elastic post 503 effectively increases the strength of the dustproof strip 501, preventing it from breaking along its root under the action of the limiting lugs 402. A reinforcing fiber 504 is fixedly connected to the side wall, and the reinforcing fiber 504 is intersected and embedded in the dustproof strip 501. The reinforcing fiber 504 can effectively increase the strength of the dustproof strip 501, making the dustproof strip 501 less prone to surface cracking or breakage. A wear-resistant ring 10 is connected between the push plate 4 and the positioning rod 8, and the wear-resistant ring 10 is fixedly connected to the push plate 4. Both the wear-resistant ring 10 and the positioning rod 8 are made of hard rubber and the surface is polished smooth. The presence of the wear-resistant ring 10 can effectively reduce the wear between the push plate 4 and the positioning rod 8, making the push plate 4 less prone to movement during detection. The positioning rod 8 and the wear-resistant ring 10, made of hard rubber, can effectively isolate the electromagnetic field formed by the high voltage inside the circuit breaker, reduce the influence of the electromagnetic field formed by the circuit breaker on the pressure sensor 7, and easily ensure the normal detection of the pressure sensor 7.

[0020] Please see Figure 7A smart pressure sensing device for circuit breakers includes a pressure sensor 7 connected to a control motherboard 13, which in turn is connected to an Internet of Things (IoT) module 14. The IoT module 14 is connected to a mobile terminal 16. The control motherboard 13 is embedded within a fixed plate 2. The control motherboard 13 can send the detection results from the pressure sensor 7 to the mobile terminal 16 via the IoT module 14, facilitating quick testing of the trip spring 9 by the user. The IoT module 14 is connected to a processing terminal 15. Simultaneously, the control motherboard 13 sends the detection results to the mobile terminal 16 via the IoT module 14, and the same data is also sent to the processing terminal 15 for storage and processing, facilitating maintenance and testing by power maintenance personnel.

[0021] Please see Figure 3-4 A signal connection line 12 is fixedly connected between the fixed plate 2 and the pressure sensor 7. One end of the signal connection line 12 passes through the fixed plate 2 and connects to the control main board 13 embedded in the fixed plate 2. The pressure sensor 7 and the control main board 13 are connected by wire to avoid the influence of external magnetic fields on the signal transmission between the pressure sensor 7 and the control main board 13. A set of limit buckles 11 is fixedly connected to the electric push rod 6, and the signal connection line 12 passes through the limit buckles 11 in sequence. The limit buckles 11 can prevent the signal connection line 12 from being scattered and avoid the signal connection line 12 from being tangled together, so as not to affect the normal movement of the electric push rod 6.

[0022] A smart pressure sensing device for circuit breakers, in its standby state, please refer to... Figure 2 At this point, the pressure sensor 7 is only in contact with the push plate 4, and the spring force of the opening spring 9 on the push plate 4 is the preset amount. However, during detection, the electric push rod 6 pushes the pressure sensor 7, causing the push plate 4 to move within the fiber groove 3. Figure 3 In the state shown above, the deformation of the opening spring 9 is fixed, that is, the change in the elastic force of the opening spring 9 is fixed. Figure 2 The preset amount of the trip spring 9 and Figures 2 to 3 The sum of the elastic forces generated by the deformation of the trip spring 9 during the process is the expected value. When the result detected by the pressure sensor 7 meets the above expected value, the trip spring 9 is in a normal state. When the result detected by the pressure sensor 7 does not meet the above expected value, the trip spring 9 is in a failed state. It is necessary to contact maintenance personnel for maintenance and repair through the processing terminal 15 connected to the control main board 13. In particular, the above detection needs to be performed multiple times and the average value is taken. The expected value should also be within the expected value range. When the average value of multiple detection results is within the expected value range, but multiple data are outside the expected value range, it is also necessary to contact maintenance personnel for maintenance and repair through the processing terminal 15 connected to the control main board 13.

[0023] This solution enables regular inspection of the trip spring 9, allowing for timely detection of faults and failures in the trip spring 9. This prevents circuit breaker tripping failures caused by the failure of the trip spring 9, minimizing the risk of injury to circuit testing personnel. In particular, a relatively sealed environment is created within the space where the pressure sensor 7 is located, preventing the magnetic field generated by the high voltage of the circuit breaker from affecting the detection of the pressure sensor 7 and minimizing the impact on its normal operation. Simultaneously, while the control motherboard 13 sends the detection results to the mobile terminal 16 via the IoT module 14, it also sends the same data to the processing terminal 15 for storage and processing, facilitating maintenance and inspection by power maintenance personnel.

[0024] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformations or substitutions fall within the scope of protection of the present invention.

Claims

1. A smart pressure sensing device for a circuit breaker, comprising a detection tube (1), wherein a fixing plate (2) is fixedly connected to the opening of the detection tube (1), characterized in that: The inner wall of the detection tube (1) is chiseled with a pair of fiber grooves (3). A push plate (4) matching itself is slidably connected inside the detection tube (1). The push plate (4) includes a detection plate (401). A pair of limiting lugs (402) matching the fiber grooves (3) are fixedly connected to the side wall of the detection plate (401). A pair of electric push rods (6) are fixedly connected to the fixed plate (2). The electric push rods (6) are located inside the detection tube (1). A pressure sensor (7) is fixedly connected to the end of the electric push rod (6) away from the fixed plate (2). The pressure sensor (7) is in contact with the push plate (4). A positioning rod (8) is inserted into the push plate (4). The positioning rod (8) passes through the push plate (4). A gate spring (9) is sleeved on the outside of the positioning rod (8). One end of the gate spring (9) is fixedly connected to the push plate (4).

2. The intelligent pressure sensing device for a circuit breaker according to claim 1, characterized in that: The fiber chute (3) is fixedly connected to a dustproof curtain (5) that matches it. The dustproof curtain (5) consists of two sets of dustproof rubber strips (501), and the ends of the two sets of dustproof rubber strips (501) that are far apart from each other are fixedly connected to the opposite sidewalls of the fiber chute (3).

3. The intelligent pressure sensing device for a circuit breaker according to claim 2, characterized in that: The dustproof strip (501) is fixed with a dustproof fiber cluster (502) at one end away from the side wall of the fiber groove (3).

4. The intelligent pressure sensing device for a circuit breaker according to claim 3, characterized in that: The dustproof fiber clusters (502) are made of highly elastic fibers, and adjacent dustproof fiber clusters (502) are intertwined and connected together, forming multiple sealed spaces between the intertwined dustproof fiber clusters (502).

5. The intelligent pressure sensing device for a circuit breaker according to claim 2, characterized in that: An elastic column (503) is inserted into the dustproof strip (501), and one end of the elastic column (503) is fixedly connected to the side wall of the fiber groove (3).

6. The intelligent pressure sensing device for a circuit breaker according to claim 5, characterized in that: The sidewall of the elastic column (503) is fixedly connected with reinforcing fibers (504), and the reinforcing fibers (504) are intersected and embedded in the dustproof strip (501).

7. The intelligent pressure sensing device for a circuit breaker according to claim 1, characterized in that: A wear-resistant ring (10) is connected between the push plate (4) and the positioning rod (8), and the wear-resistant ring (10) is fixedly connected to the push plate (4). Both the wear-resistant ring (10) and the positioning rod (8) are made of hard rubber and have smooth surfaces.

8. The intelligent pressure sensing device for a circuit breaker according to claim 1, characterized in that: The pressure sensor (7) is connected to the control motherboard (13), the control motherboard (13) is connected to the Internet of Things (IoT) module (14), the IoT module (14) is connected to the mobile terminal (16), the control motherboard (13) is embedded in the fixed plate (2), and the IoT module (14) is connected to the processing terminal (15).

9. The intelligent pressure sensing device for a circuit breaker according to claim 1, characterized in that: A signal connection line (12) is fixedly connected between the fixed plate (2) and the pressure sensor (7), and one end of the signal connection line (12) passes through the fixed plate (2) and is connected to the control main board (13) embedded in the fixed plate (2).

10. The intelligent pressure sensing device for a circuit breaker according to claim 1, characterized in that: A set of limit buckles (11) are fixedly connected to the electric push rod (6), and the signal connection line (12) passes through the limit buckles (11) in sequence.

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