Intelligent circuit breaker mechanical fault prediction device

Abstract

An intelligent breaker mechanical fault prediction device disclosed by the present invention comprises an intelligent breaker body, the inner side wall of the intelligent breaker body is fixedly connected with a mechanical locking device through a screw, the power input end of the mechanical locking device is provided with a reset switch, and the power output end of the mechanical locking device is provided with a moving contact. A protective electromagnetic release, a rapid arc extinguishing device and an inner partition plate are fixedly connected to the position, close to the lower portion of the mechanical locking device, of the inner side wall of the intelligent circuit breaker body through screws; the tuning fork is directly contacted with the impact head linked with the moving contact, so that the moving contact can be directly detected, the problem of inaccurate signal acquisition information caused by the weakening or loss influence of a traditional vibration signal can be avoided while the breaking of the circuit by the moving contact is not influenced, and the protection effect of the intelligent circuit breaker body on electrical equipment is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit breaker mechanical fault prediction, and in particular relates to an intelligent circuit breaker mechanical fault prediction device. Background Art

[0002] A circuit breaker is a reset switch device that can close, carry and disconnect current under normal circuit conditions and can close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The boundary between high and low voltage is relatively vague. Generally, those above 3kV are called high-voltage electrical appliances. The intelligent circuit breaker mechanism is located on the front of the circuit breaker. The mechanism adopts a five-link free release mechanism and is designed in an energy storage form. During the use of the intelligent circuit breaker, the mechanism is always in the pre-energy storage position. As long as the circuit breaker receives a closing command, the circuit breaker can be closed instantly, which is completed by the pre-energy storage release button or closing electromagnet. At present, the intelligent circuit breaker mechanism lacks the corresponding mechanical failure to predict the mechanical failure inside the intelligent circuit breaker, which makes it easy for the circuit breaker to fail and cause subsequent equipment operation damage.

[0003] An existing technical solution for predicting mechanical failure of a circuit breaker discloses a vibration monitoring device for mechanical failure of a high-voltage circuit breaker, comprising a power supply module, a signal acquisition module, a signal conditioning module, an external storage module, a control module, an A / D conversion module, and a fault alarm module. The power supply module is respectively connected to the signal acquisition module, the control module, the A / D conversion module, and the fault alarm module. The input end of the signal acquisition module is connected to the high-voltage circuit breaker. The signal acquisition module is used to collect the vibration signal of the high-voltage circuit breaker. The output end of the signal acquisition module is connected to the signal conditioning module. The signal conditioning module is connected to the control module via the A / D conversion module. The control module is respectively connected to the external storage module and the fault alarm module.

[0004] The existing technology usually determines whether there is a mechanical fault by analyzing the vibration signal in the circuit breaker to achieve the purpose of monitoring. However, the vibration signal in the circuit breaker is unstable. Due to the existence of other components in the circuit breaker, the vibration will be detected after multiple transmissions. There is a loss in the transmission path, and the loss is uncontrollable. This leads to errors in the vibration signal, and it is not possible to intuitively and accurately monitor whether there is a mechanical fault in the circuit breaker. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an intelligent circuit breaker mechanical fault prediction device in view of the deficiencies in the above-mentioned prior art, so as to solve the technical problem that there is currently a lack of corresponding mechanical fault prediction for the internal mechanical fault of an intelligent circuit breaker.

[0006] The present invention adopts the following technical solutions: An intelligent circuit breaker mechanical fault prediction device comprises an intelligent circuit breaker body, an inner side wall of the intelligent circuit breaker body is fixedly connected with a mechanical locking device, a power input end of the mechanical locking device is provided with a reset switch, and a power output end of the mechanical locking device is provided with a moving contact; A short-circuit protection electromagnetic release, a rapid arc extinguishing device and an inner partition are respectively fixedly connected at a position below the mechanical locking device on the inner side wall of the intelligent circuit breaker body. The inner partition is located between the short-circuit protection electromagnetic release and the rapid arc extinguishing device. A fixed contact is arranged on the top of the inner partition. An overload protection bimetallic strip is provided on the inner side wall of the intelligent circuit breaker body at a position close to the upper side of the mechanical locking device, and a terminal is embedded on the corresponding side outer wall of the intelligent circuit breaker body; An integrally formed first linkage rod is arranged on an outer wall of one side of the moving contact, and an impact head is arranged on an end of the first linkage rod away from the moving contact; A first sealing cover is fixedly connected to an outer wall of one side of the intelligent circuit breaker body near the outer side of the impact head, a tuning fork is fixedly connected to an inner wall of one side of the first sealing cover near the upper side of the impact head, and a sound sensor is embedded in the top of the first sealing cover.

[0007] Preferably, a second linkage rod is provided on the outer wall on the other side of the moving contact, an extrusion head is provided on the end of the second linkage rod away from the moving contact, and a dynamic docking column is provided on the top of the extrusion head; A second sealing cover is fixedly connected to the outer wall of one side of the intelligent circuit breaker body near the outer side of the extrusion head, an arc-shaped seat is fixedly connected to the inner top of the second sealing cover, a pressure sensor is arranged on the top of the arc-shaped seat, a spring is arranged at the bottom of the pressure sensor, and a static docking column is arranged at the bottom end of the spring.

[0008] Preferably, a controller and a wireless signal transceiver are fixedly connected to an outer wall on one side of the second sealing cover by bolts, and the controller is located above the wireless signal transceiver.

[0009] Preferably, the sound sensor, the pressure sensor and the wireless signal receiver are all electrically connected to the controller.

[0010] Preferably, the dynamic docking column and the static docking column are matched and arranged, and the movement trajectory of the static docking column in the arc seat is the same as the movement trajectory of the dynamic contact.

[0011] Preferably, a through slot is provided on an outer wall of one side of the intelligent circuit breaker body adjacent to the first sealing cover at an outer position close to the reset switch, and the reset switch protrudes from the intelligent circuit breaker body.

[0012] Preferably, a first through slot is provided on an outer wall of one side of the intelligent circuit breaker body near the outer side of the first linkage rod, the impact head is located inside the first sealing cover, and the cross section of the first through slot is arc-shaped.

[0013] Preferably, a second through slot is provided on the outer wall of the other side of the intelligent circuit breaker body near the outer side of the second linkage rod, the extrusion head is located inside the second sealing cover, and the cross section of the second through slot is arc-shaped.

[0014] Preferably, the impact head moves synchronously with the motion trajectory of the moving contact, and the impact head strikes the tuning fork during the movement.

[0015] Preferably, the moving contact can be precisely docked with the fixed contact under the drive of the mechanical locking device.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: An intelligent circuit breaker mechanical fault prediction device, through an extrusion head linked with a moving contact, makes the moving contact directly hit a tuning fork in the rebound process under the action of pre-storage energy, compares the sound information emitted by the tuning fork after vibration, controls the change of monitoring sound to monitor the change of the rebound potential energy of the moving contact, thereby judging whether a mechanical fault will occur in the subsequent use of the mechanical locking device, and achieving the purpose of prediction, by using the tuning fork to directly contact the impact head linked with the moving contact, the moving contact can be directly detected, which does not affect the circuit breaking of the moving contact, and can also avoid the problem of inaccurate signal acquisition information caused by the weakening or loss of traditional vibration signals, thereby ensuring the protective effect of the intelligent circuit breaker body on electrical equipment; through the extrusion head linked with the moving contact, the moving contact is squeezed by the static docking column in the rebound process under the action of pre-storage energy, and the rebound potential energy of the moving contact is judged by detecting the change of the pressure value of the static docking column, thereby providing another way for predicting the mechanical fault of the intelligent circuit breaker, and the double monitoring prediction can ensure the accuracy of the prediction, and reduce the influence of the intelligent circuit breaker body itself and the outside on the mechanical fault prediction.

[0017] Furthermore, the extrusion force exerted on the static docking column is detected by a pressure sensor, and the mechanical rebound force of the moving contact is determined by using the change in the pressure value, thereby achieving dual detection of vibration sound and extrusion pressure.

[0018] Furthermore, the problem of misalignment of the static docking column and the dynamic docking column under gradual extrusion is avoided, thereby ensuring stability during docking and extrusion.

[0019] Furthermore, the cross section of the first through groove is arc-shaped, and the first through groove is provided to enable the first linkage rod to move smoothly, thereby preventing the movement of the first linkage rod from being blocked.

[0020] Furthermore, the cross section of the second through groove is arc-shaped, and the second through groove can be provided to enable the second linkage rod to move smoothly, thereby avoiding obstruction in the movement of the second linkage rod.

[0021] In summary, the present invention can ensure the protective effect of the intelligent circuit breaker body on electrical equipment.

[0022] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings to be used in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the matching structure of the intelligent circuit breaker body and the second sealing cover of the present invention; Figure 3 It is a schematic diagram of the matching structure of the intelligent circuit breaker body and the first sealing cover of the present invention; Figure 4 It is a schematic diagram of the structure of the first sealing cover of the present invention; Figure 5 It is a schematic diagram of the structure of the second sealing cover of the present invention; Figure 6 It is a schematic diagram of the local structure of the moving contact of the present invention; Figure 7 It is a cross-sectional view of the arc seat of the present invention; Figure 8 For the present invention Figure 1 Enlarged view of point A in .

[0025] Among them: 1. Intelligent circuit breaker body; 2. Mechanical locking device; 3. Reset switch; 4. Moving contact; 5. Short-circuit protection electromagnetic release; 6. Rapid arc extinguishing device; 7. Inner partition; 8. Overload protection bimetallic strip; 9. Terminal; 10. First linkage rod; 11. Impact head; 12. Second linkage rod; 13. Extrusion head; 14. Moving docking column; 15. First through groove; 16. First sealing cover; 17. Tuning fork; 18. Sound sensor; 19. Second through groove; 20. Second sealing cover; 21. Arc seat; 22. Pressure sensor; 23. Spring; 24. Static docking column; 25. Controller; 26. Wireless signal receiver; 27. Fixed contact. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "one side", "one end", "one side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0030] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0031] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0032] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0033] The present invention provides an intelligent circuit breaker mechanical fault prediction device, wherein a mechanical locking device is fixedly connected to the inner side wall of the intelligent circuit breaker body by screws, a reset switch is arranged at the power input end of the mechanical locking device, and a moving contact is arranged at the power output end of the mechanical locking device, and a protective electromagnetic release, a rapid arc extinguishing device and an inner partition are fixedly connected to the inner side wall of the intelligent circuit breaker body at a position below the mechanical locking device by screws; the moving contact can be directly detected by directly contacting an impact head linked to the moving contact by a tuning fork, which does not affect the breaking of the circuit by the moving contact and can also avoid the problem of inaccurate signal acquisition information caused by the weakening or loss of traditional vibration signals, thereby ensuring the protective effect of the intelligent circuit breaker body on electrical equipment.

[0034] See also Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 8The present invention discloses an intelligent circuit breaker mechanical fault prediction device, comprising an intelligent circuit breaker body 1, a mechanical locking device 2 is fixedly connected to the inner side wall of the intelligent circuit breaker body 1 by screws, and a reset switch 3 is arranged at the power input end of the mechanical locking device 2; a through groove is provided on the outer wall of the intelligent circuit breaker body 1 adjacent to the first sealing cover 16 at the outer position close to the reset switch 3, and the reset switch 3 protrudes from the intelligent circuit breaker body 1. The reset switch 3 protruding from the intelligent circuit breaker body 1 is convenient for controlling the opening of the intelligent circuit breaker body 1, so that the reset switch 3 is manually pushed upward after the circuit breaker body 1 is disconnected, so that the intelligent circuit breaker body 1 has circuit protection again, and the machine A moving contact 4 is provided at the power output end of the mechanical locking device 2. A short-circuit protection electromagnetic release 5, a rapid arc extinguishing device 6 and an inner partition 7 are fixedly connected by screws at a position below the mechanical locking device 2 on the inner side wall of the intelligent circuit breaker body 1. The inner partition 7 is located between the short-circuit protection electromagnetic release 5 and the rapid arc extinguishing device 6. A fixed contact 27 is provided on the top of the inner partition 7. The moving contact 4 can be precisely docked with the fixed contact 27 under the drive of the mechanical locking device 2. After the moving contact 4 and the fixed contact 27 are precisely docked, a circuit is formed. An overload protection bimetallic strip 8 is provided at a position above the side of the inner side wall of the intelligent circuit breaker body 1 near the mechanical locking device 2, and an outer side of the intelligent circuit breaker body 1 is provided. A terminal 9 is embedded in the wall, a first linkage rod 10 is integrally formed on the outer wall of one side of the moving contact 4, and a striking head 11 is integrally formed on the end of the first linkage rod 10 away from the moving contact 4. A first sealing cover 16 is fixedly connected to the outer position of the striking head 11 on the outer wall of one side of the intelligent circuit breaker body 1 by screws, and a tuning fork 17 is fixedly connected to the upper side position of the striking head 11 on the inner wall of one side of the first sealing cover 16 by screws. The vibration of the tuning fork 17 is used to detect the impact force of the striking head 11, so as to judge the rebound force of the moving contact 4 connected to the striking head 11, and then judge the mechanical performance, so as to avoid the poor reset ability of the moving contact 4 caused by the degradation of the performance of the moving contact 4 due to long-term use. The ringing circuit is short-circuited instantly, and the impact head 11 moves synchronously with the movement trajectory of the moving contact 4, and the impact head 11 hits the tuning fork 17 during the movement. A sound sensor 18 is embedded and fixed on the top of the first sealing cover 16. The sound sensor 18 can detect the sound emitted by the tuning fork 17, and the collected sound information is used for comparison to judge the mechanical properties of the moving contact 4. A first through groove 15 is opened on the outer wall of one side of the intelligent circuit breaker body 1 near the outer side of the first linkage rod 10, and the impact head 11 is located inside the first sealing cover 16. The cross-section of the first through groove 15 is arc-shaped. The setting of the first through groove 15 allows the first linkage rod 10 to move smoothly, thereby avoiding obstruction to the movement of the first linkage rod 10.

[0035] During operation, the prior art usually determines whether there is a mechanical fault by monitoring the vibration signal in the circuit breaker, thereby achieving the purpose of monitoring. However, the vibration signal in the circuit breaker is unstable. Due to the presence of other components in the circuit breaker, the vibration will be detected after multiple transmissions. There is a loss in the transmission path, and this loss is uncontrollable. This leads to errors in the vibration signal, and it is not possible to intuitively and accurately monitor whether there is a mechanical fault in the circuit breaker. The present technical solution can solve the above problems. The specific working method is as follows: The first sealing cover 16 is fixedly mounted on the outer wall of the intelligent circuit breaker body 1. At this time, the impact head 11 is located at the lower side of the tuning fork 17. When a circuit abnormality occurs, the short-circuit protection electromagnetic release 5 performs a decoupling operation. The moving contact 4 on the mechanical locking device 2 quickly tilts upward and rebounds under the action of pre-storage energy. The moving contact 4 and the fixed contact 27 are separated, and the circuit is disconnected. During the movement of the moving contact 4, the first linkage rod 10 on the moving contact 4 moves synchronously, and the impact head 11 at one end of the first linkage rod 10 also moves synchronously. The impact head 11 hits the tuning fork 17 during the movement. After the tuning fork 17 is hit, it vibrates and makes a sound. The sound sensor 18 collects the sound. The collected sound information is sent to the remote end through the wireless signal receiver 26, and the collected sound information is compared using the memory, identification comparator and other structures provided at the remote end. When the collected sound information changes (becomes weaker), it means that the rebound potential energy of the moving contact 4 has deteriorated, and the mechanical locking device 2 is prone to mechanical failure in the future, causing the intelligent circuit breaker body 1 to lose its short-circuit breaking ability, thereby easily causing damage to electrical equipment. The tuning fork 17 directly contacts the impact head 11 linked to the moving contact 4, and can directly detect the moving contact 4, which does not affect the breaking of the circuit by the moving contact 4, and can also avoid the problem of inaccurate signal collection information caused by the weakening of the traditional vibration signal.

[0036] See also Figure 2 , Figure 5 , Figure 6 and Figure 8, including a moving contact 4, a second linkage rod 12 is integrally formed on the outer wall of the other side of the moving contact 4, an extrusion head 13 is integrally formed on the end of the second linkage rod 12 away from the moving contact 4, and a dynamic docking column 14 is arranged on the top of the extrusion head 13, and a second sealing cover 20 is fixedly connected to the outer position of the extrusion head 13 on the outer wall of one side of the intelligent circuit breaker body 1 by screws, and a controller 25 and a wireless signal receiver 26 are fixedly connected to the outer wall of one side of the second sealing cover 20 by bolts, and the controller 25 is located above the wireless signal receiver 26, and the sound sensor 18, the pressure sensor 22 and the wireless signal receiver 26 are all electrically connected to the controller 25, and the inner top of the second sealing cover 20 is fixedly connected to the arc seat 21 by screws, and the inner top of the arc seat 21 is provided with a pressure sensor 22, and the static docking column 2 is detected by the pressure sensor 22 4 is subjected to the extrusion pressure, and the change of the pressure value is used to judge the mechanical rebound force of the moving contact 4, so as to realize the dual detection of vibration sound and extrusion pressure. A spring 23 is arranged at the bottom of the pressure sensor 22, and a static docking column 24 is arranged at the bottom end of the spring 23. The dynamic docking column 14 and the static docking column 24 match each other. The movement trajectory of the static docking column 24 in the arc seat 21 is the same as the movement trajectory of the moving contact 4, so as to avoid the problem of misalignment between the static docking column 24 and the dynamic docking column 14 under gradual extrusion, and ensure the stability during docking and extrusion. A second through groove 19 is provided on the outer wall of the other side of the intelligent circuit breaker body 1 at the outer position close to the second linkage rod 12, and the extrusion head 13 is located inside the second sealing cover 20. The cross section of the second through groove 19 is arc-shaped. The second through groove 19 can make the second linkage rod 12 move smoothly and avoid the movement of the second linkage rod 12 being blocked.

[0037] During operation, the prior art usually determines whether there is a mechanical fault by monitoring the vibration signal in the circuit breaker, thereby achieving the purpose of monitoring. However, the vibration signal in the circuit breaker is unstable. Due to the presence of other components in the circuit breaker, the vibration will be detected after multiple transmissions. There is a loss in the transmission path, and this loss is uncontrollable. This leads to errors in the vibration signal, and it is not possible to intuitively and accurately monitor whether there is a mechanical fault in the circuit breaker. The present technical solution can solve the above problems. The specific working method is as follows: The second sealing cover 20 is fixedly mounted on the outer side wall of the intelligent circuit breaker body 1. At this time, the extrusion head 13 is located at the side and lower side of the static docking column 24. When a circuit abnormality occurs, the short-circuit protection electromagnetic release 5 performs a decoupling operation. The moving contact 4 on the mechanical locking device 2 quickly tilts upward and rebounds under the action of pre-storage energy. The moving contact 4 and the fixed contact 27 are separated, and the circuit is disconnected. During the movement of the moving contact 4, the second linkage rod 12 on the moving contact 4 moves synchronously, and the extrusion head 13 at one end of the second linkage rod 12 also moves synchronously. During the movement, the extrusion head 13 drives the moving docking column 14 to contact the static docking column 24. After the static docking column 24 is impacted, The arc seat 21 moves internally, and the static docking column 24 squeezes the spring 23. The spring 23 is compressed. The spring 23 squeezes the pressure sensor 22 under the action of the elastic deformation force. The pressure sensor 22 detects the pressure value, and the collected pressure information is sent to the remote end through the wireless signal receiver 26. The storage device, identification comparator and other structures provided at the remote end are used to compare the collected pressure information. When the collected pressure information changes (becomes smaller), it means that the rebound potential energy of the moving contact 4 becomes worse, and the mechanical locking device 2 is prone to mechanical failure later, resulting in the intelligent circuit breaker body 1 losing the ability to break the short circuit, which is easy to cause damage to the electrical equipment.

[0038] The working principle of an intelligent circuit breaker mechanical fault prediction device of the present invention is as follows: The first sealing cover 16 is fixedly mounted on the outer wall of the intelligent circuit breaker body 1. At this time, the impact head 11 is located below the tuning fork 17. When a circuit abnormality occurs, the short-circuit protection electromagnetic release 5 performs a decoupling operation. The moving contact 4 on the mechanical locking device 2 quickly tilts upward and rebounds under the action of pre-storage energy. The moving contact 4 and the fixed contact 27 are separated, and the circuit is disconnected. During the movement of the moving contact 4, the first linkage rod 10 on the moving contact 4 moves synchronously, and the impact head 11 at one end of the first linkage rod 10 also moves synchronously. The impact head 11 hits the tuning fork 17 during the movement. After the tuning fork 17 is hit, it vibrates and makes a sound, and the sound sensor 18 collects the sound. The second sealing cover 20 is fixedly mounted on the outer wall of the intelligent circuit breaker body 1. At this time, the extrusion head 13 is located at the lower side of the static docking column 24. When a circuit abnormality occurs, the short-circuit protection electromagnetic release 5 performs a decoupling operation. The moving contact 4 on the mechanical locking device 2 quickly tilts upward and rebounds under the action of pre-storage energy. The moving contact 4 and the fixed contact 27 are separated, and the circuit is disconnected. During the movement of the moving contact 4, the second linkage rod 12 on the moving contact 4 moves synchronously, and the extrusion head 13 at one end of the second linkage rod 12 also moves synchronously. During the movement, the extrusion head 13 drives the moving docking column 14 to contact the static docking column 24. After the static docking column 24 is impacted, it moves inside the arc seat 21. The static docking column 24 squeezes the spring 23, and the spring 23 is compressed. The spring 23 squeezes the pressure sensor 22 under the action of the elastic deformation force, and the pressure sensor 22 detects the pressure value. The collected sound information and pressure information are sent to the remote end through the wireless signal receiver 26, and the collected sound information and pressure information are compared and contrasted by using the memory, identification comparator and other structures arranged at the remote end. When the collected sound information changes (becomes weaker) and the pressure information changes (becomes smaller), it means that the rebound potential energy of the moving contact 4 has deteriorated, and the mechanical locking device 2 is prone to mechanical failure in the future, causing the intelligent circuit breaker body 1 to lose the ability to break the short circuit, which is easy to cause damage to the electrical equipment. The tuning fork 17 directly contacts the impact head 11 linked to the moving contact 4, and directly detects the moving contact 4, which does not affect the breaking of the circuit by the moving contact 4, and can also avoid the problem of inaccurate signal collection information caused by the weakening of the traditional vibration signal.

[0039] In summary, the intelligent circuit breaker mechanical fault prediction device of the present invention utilizes a tuning fork to directly contact an impact head linked to a moving contact, so as to directly detect the moving contact without affecting the breaking of the circuit by the moving contact. At the same time, it can also avoid the problem of inaccurate signal acquisition information caused by the weakening or loss of traditional vibration signals.

[0040] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. An intelligent circuit breaker mechanical fault prediction device, characterized in that: It comprises an intelligent circuit breaker body (1), the inner side wall of the intelligent circuit breaker body (1) is fixedly connected with a mechanical locking device (2), a power input end of the mechanical locking device (2) is provided with a reset switch (3), and a power output end of the mechanical locking device (2) is provided with a moving contact (4); A short-circuit protection electromagnetic release (5), a rapid arc extinguishing device (6) and an inner partition (7) are respectively fixedly connected at a position below the mechanical locking device (2) on the inner side wall of the intelligent circuit breaker body (1); the inner partition (7) is located between the short-circuit protection electromagnetic release (5) and the rapid arc extinguishing device (6); and a fixed contact (27) is provided on the top of the inner partition (7); An overload protection bimetallic strip (8) is provided on the inner side wall of the intelligent circuit breaker body (1) at a position above the side close to the mechanical locking device (2), and a terminal (9) is embedded on the corresponding side outer wall of the intelligent circuit breaker body (1); An integrally formed first linkage rod (10) is provided on an outer wall of one side of the moving contact (4), and an impact head (11) is provided on an end of the first linkage rod (10) away from the moving contact (4); A first sealing cover (16) is fixedly connected to an outer wall of one side of the intelligent circuit breaker body (1) near the outer side of the impact head (11), a tuning fork (17) is fixedly connected to an inner wall of one side of the first sealing cover (16) near the upper side of the impact head (11), and a sound sensor (18) is embedded in the top of the first sealing cover (16).

2. The intelligent circuit breaker mechanical failure prediction device according to claim 1, characterized in that: A second linkage rod (12) is provided on the outer wall of the other side of the moving contact (4), an extrusion head (13) is provided on the end of the second linkage rod (12) away from the moving contact (4), and a moving docking column (14) is provided on the top of the extrusion head (13); A second sealing cover (20) is fixedly connected to an outer wall of one side of the intelligent circuit breaker body (1) at an outer position close to the extrusion head (13); an arc-shaped seat (21) is fixedly connected to the inner top of the second sealing cover (20); a pressure sensor (22) is arranged at the top of the arc-shaped seat (21); a spring (23) is arranged at the bottom of the pressure sensor (22); and a static docking column (24) is arranged at the bottom end of the spring (23).

3. The intelligent circuit breaker mechanical failure prediction device according to claim 2, characterized in that: A controller (25) and a wireless signal transceiver (26) are fixedly connected to an outer wall on one side of the second sealing cover (20) by means of bolts, and the controller (25) is located above the wireless signal transceiver (26).

4. The intelligent circuit breaker mechanical failure prediction device according to claim 3, characterized in that: The sound sensor (18), the pressure sensor (22) and the wireless signal receiver (26) are all electrically connected to the controller (25).

5. The intelligent circuit breaker mechanical failure prediction device according to claim 2, characterized in that: The dynamic docking column (14) and the static docking column (24) are matched and arranged, and the motion trajectory of the static docking column (24) on the arc seat (21) is the same as the motion trajectory of the dynamic contact (4).

6. The intelligent circuit breaker mechanical failure prediction device according to claim 1, characterized in that: A through slot is provided on an outer wall of one side of the intelligent circuit breaker body (1) adjacent to the first sealing cover (16) at a position close to the outer side of the reset switch (3), and the reset switch (3) protrudes from the intelligent circuit breaker body (1).

7. The intelligent circuit breaker mechanical failure prediction device according to claim 6, characterized in that: A first through slot (15) is provided on an outer wall of one side of the intelligent circuit breaker body (1) near the outer side of the first linkage rod (10); the impact head (11) is located inside the first sealing cover (16); and the cross section of the first through slot (15) is arc-shaped.

8. The intelligent circuit breaker mechanical failure prediction device according to claim 6, characterized in that: A second through slot (19) is provided on the outer wall of the other side of the intelligent circuit breaker body (1) near the outer side of the second linkage rod (12); the extrusion head (13) is located inside the second sealing cover (20); and the cross section of the second through slot (19) is arc-shaped.

9. The intelligent circuit breaker mechanical failure prediction device according to claim 1, characterized in that: The impact head (11) moves synchronously with the movement trajectory of the moving contact (4), and the impact head (11) strikes the tuning fork (17) during the movement.

10. The intelligent circuit breaker mechanical failure prediction device according to claim 1, characterized in that: The moving contact (4) is precisely docked with the fixed contact (27) under the drive of the mechanical locking device (2).

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