High-precision dynamic response sensor for opening and closing time of circuit breaker

Abstract

The invention relates to the technical field of power grid monitoring, in particular to a high-precision circuit breaker opening and closing time dynamic response sensor which is used for an opening / closing coil and comprises an upper shell, a base, a Hall element, a wiring port, a transmission module, sliding discs and a cover plate. The two sliding discs are arranged on the upper shell and located on the rear side and the front side of the upper shell respectively, the cover plate comprises plate bodies and a sliding strip, the two plate bodies are connected to the rear side and the front side of the upper shell respectively and located on the upper side and the left side of the wire hole, the sliding strip is connected to the plate body on the left side, and the thickness of the side, close to the upper shell, of the sliding strip is larger than that of the side, away from the upper shell, of the sliding strip; according to the invention, the wire rod is clamped and straightened before opening and closing and is released after opening and closing, so that the wire rod is completely straightened when the sensor monitors the opening and closing time of the circuit breaker, and the purpose of improving the monitoring precision of the sensor is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid monitoring, and in particular to a high-precision circuit breaker opening and closing time dynamic response sensor. Background Art

[0002] With the development of a series of technologies such as PLC control, the power grid is developing in the direction of intelligence. Remote monitoring is a major feature of the smart grid. Through the cooperation of various components and circuits, real-time monitoring of various data is realized to ensure the stable operation of equipment and the normal operation of the power grid. For example, for the monitoring of the opening and closing time of the circuit breaker, the measurement principle is: first determine the starting time and the ending time of the opening and closing, and then calculate the opening or closing time by the difference between the ending time and the starting time; the end time is determined when the normally open or normally closed auxiliary contact circuit of the circuit breaker is turned on. Usually, the auxiliary contact circuit serves as the control or status circuit of the main contact, and the internal current is weak. Therefore, the current can be directly connected to the pins of the chip after circuit shaping; the presence of current in the opening and closing coil is determined as the start time. The starting moment of the opening and closing coil needs to control the action of the trigger rod inside the coil through its own electromagnetic effect. Therefore, there is a large current inside the opening and closing coil. Therefore, it is necessary to use indirect monitoring to determine the starting moment of the opening and closing. The common method is to use the sensor to dynamically respond to the current inside the opening and closing coil to feedback the starting moment. For example, a Hall sensor is used. The Hall sensor itself is connected to an independent power supply. The wire of the opening and closing coil passes through the Hall element of the Hall sensor. Then, when the current passes through the opening and closing coil, the Hall element will also generate a weak current of 0 to 100 mA. This weak current is converted into a 0 to 3V voltage signal after measuring the resistor and input into the chip. The chip calculates the difference between the starting moment and the end moment to obtain the accurate opening and closing time of the circuit breaker.

[0003] Hall sensors used for monitoring the opening and closing time of circuit breakers usually avoid encapsulating wires inside the Hall element. This can avoid multiple wiring to reduce the loss of opening and closing coil current, and can also improve the installation flexibility of the Hall sensor to facilitate installation and maintenance operations. However, this also causes the position of the wire passing through the Hall element to be unstable, and the vibration caused by the current will cause the wire to shake, thereby affecting the accuracy of the Hall sensor monitoring, especially when monitoring circuit breakers used in large switch cabinets, the accuracy of the Hall sensor will be further reduced. In order to avoid the shaking of the wire inside the Hall element and to improve the accuracy of the Hall sensor, the existing technology usually sets brackets at the entry and exit ends of the wire to fix the position of the wire inside the Hall element, so that the wire remains stable in the vibration environment caused by large current.

[0004] The existing technology prevents the wire from shaking inside the Hall element by fixing it. Although this method promotes the improvement of the accuracy of the Hall sensor in monitoring the opening and closing time of the circuit breaker, it still has certain limitations: when fixing the wire with a bracket, in order to avoid the harm of cold shrinkage, the wire cannot be completely straightened, that is, at the beginning of fixing, the wire still has room for movement, that is, the wire will still shake slightly, and as the temperature rises (room temperature plus the heat generated by the operation of related equipment), the above-mentioned wire shaking phenomenon will become more obvious, which will still lead to a decrease in the monitoring accuracy of the Hall sensor.

[0005] Therefore, a high-precision circuit breaker opening and closing time dynamic response sensor is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-precision circuit breaker opening and closing time dynamic response sensor, which solves the problem that the wire inside the sensor cannot be fully straightened, and the straightness of the wire further decreases with increasing temperature, causing the wire to shake, thereby reducing the sensor monitoring accuracy. By clamping and straightening the wire before opening and closing, and releasing the wire after opening and closing, the wire is fully straightened when the sensor monitors the circuit breaker opening and closing time, thereby improving the sensor monitoring accuracy.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A high-precision circuit breaker opening and closing time dynamic response sensor, used for an opening / closing coil, comprises an upper shell, a base, a Hall element, and a wiring port. The upper shell has a wire hole, the Hall element is mounted inside the upper shell, and the Hall element is coaxial with the wire hole. The sensor also comprises a transmission module, a sliding plate, and a cover plate. The transmission module passes through the upper shell, and the two sliding plates are slidably connected to the base, and the two sliding plates are respectively located on the rear and front sides of the upper shell. The cover plate comprises a plate body and a slide bar. The two plate bodies are respectively connected to the rear and front sides of the upper shell, and the plate body is located above and to the left of the wire hole. The slide bar is connected to the plate body on the left side, and the thickness of the slide bar near the upper shell is greater than the thickness of the slide bar away from the upper shell.

[0009] The two sliding plates are driven by the transmission module to move in opposite directions or towards each other at the same time. The two sliding plates moving in opposite directions are pushed by the thicker side of the slide bar to release the opening / closing coil, and the two sliding plates moving in opposite directions are separated from the slide bar and clamp the opening / closing coil.

[0010] Preferably, the sliding plate is provided with a sliding cavity along the front-back direction, the sliding cavity passes through the sliding plate, and a thread is arranged inside the sliding cavity, the transmission module comprises a lead screw, a driven tooth, a driving tooth and a motor, the lead screw passes through the upper shell and meshes with the threads in the two sliding cavities (71), and the threads on both sides of the lead screw have opposite rotation directions, the driven tooth is installed in the middle of the lead screw, and the driven tooth is located inside the upper shell, the driving tooth meshes with the driven tooth, and the output shaft of the motor is inserted into the driving tooth;

[0011] In the above scheme, driven by the motor, the lead screw drives the two sliding plates to move toward or away from each other simultaneously through its two sections of thread rotating in opposite directions, so that the wire of the opening and closing coil in the wire hole is relaxed or straightened. In the naturally relaxed state, the life of the wire can be effectively extended. In the straightened state, the wire will not shake, thereby improving the accuracy of the Hall sensor in monitoring the opening and closing time of the circuit breaker.

[0012] Preferably, the sliding plate is provided with a clamping claw, and each sliding plate has two clamping claws, and the clamping claws slide in the up-down direction on the sliding plate, and a spring is provided between the clamping claw and the sliding plate, and the clamping claws are in contact with the slide bar when the sliding plates move toward each other;

[0013] In the above scheme, two clamping jaws that slide up and down are provided, which has at least the following effects: 1) the wire of the opening / closing coil naturally droops due to its own gravity, so the wire is usually bent downward. Therefore, the clamping jaws are arranged up and down, so that the clamping jaws can gradually straighten the wire as they slide along the sliding plate and gradually tighten, so as to prevent the wire from instantly changing from a relaxed state to a straightened state, thereby preventing the wire from breaking due to instantaneous large stress; 2) it can clamp the wire of the opening / closing coil with different cross-sectional shapes, such as wire with a rectangular cross-sectional shape.

[0014] Preferably, the slide bar includes a release section and a buffer section, the release section and the buffer section are respectively close to and far away from the upper shell, the length of the release section in the vertical direction is greater than the maximum length of the wire of the opening / closing coil in the vertical direction, and the length of the buffer section in the vertical direction gradually decreases in the direction away from the upper shell;

[0015] In the above scheme, when the two sliding discs move toward each other, the release section pushes the two jaws apart, and through its own length in the vertical direction, makes the minimum distance between the two jaws greater than the maximum length of the wire of the opening / closing coil in the vertical direction, thereby releasing the clamping of the jaws on the wire, so that the wire remains in a natural state; the buffer section gradually tightens the two sliding discs when they move away from each other, so as to gradually straighten the wire while moving away from each other.

[0016] Preferably, the cover plate further comprises a wire-passing plate, the wire-passing plate is connected to one end of the plate body away from the upper shell, and a through hole is opened on the wire-passing plate, and the through hole is coaxially arranged with the wire hole;

[0017] In the above scheme, the through hole is set to support the wire of the opening / closing coil passing through the wire hole, so that the wire is as straight as possible in the natural state, which not only makes the transition of the wire between the relaxed state and the straight state smoother, but also reduces the stroke of the sliding plate movement, thereby reducing the energy consumption of the motor, thereby making the sensor more energy-efficient.

[0018] Preferably, the two through holes are both configured as tapered hole structures, and the major diameters of the two through holes are oriented in the same direction, and the direction of the major diameter of the through holes is opposite to the direction of the wiring port relative to the upper shell;

[0019] In the above scheme, the large-diameter end of the through-hole facilitates the insertion of the wire of the opening / closing coil; and the direction of the wiring port relative to the upper shell is opposite to the direction of the large diameter of the through-hole, which is for the convenience of subsequent wiring: the wire usually enters from the rear side of the sensor and exits from the front side of the sensor, and the side opposite to the large diameter of the through-hole is the exit side. Arranging the wiring port on the exit side makes installation and maintenance operations more convenient.

[0020] Preferably, the length of the sliding cavity along the front-to-back direction is greater than the length of the single-section thread of the screw along the front-to-back direction, so as to prevent dust accumulation on the screw thread after long-term work, thereby ensuring smooth movement of the sliding disk and improving the stability of the sensor operation.

[0021] Preferably, both ends of the sliding cavity are configured as tapered structures, and the large diameter end of the tapered structure of the sliding cavity is on the outside;

[0022] In the above scheme, the conical structure of the sliding cavity not only facilitates the assembly between the sliding disk and the screw, but also avoids the contact between the non-threaded part of the sliding cavity and the non-threaded part of the screw, thereby avoiding friction between the two to reduce the energy consumption of the motor, and avoiding the sliding cavity from bringing the dust accumulated on the non-threaded part of the screw into the threaded part, thereby making the movement of the sliding disk smoother.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention drives two sliding plates to move toward or away from each other simultaneously through a lead screw. The sliding plates clamp the wire during the movement away from each other to straighten the wire before the circuit breaker opens or closes, thereby preventing the wire from shaking during the sensor monitoring the opening and closing time, thereby ensuring the accuracy of the sensor; the sliding plates release the wire during the movement toward each other, allowing the wire to return to a naturally relaxed state, thereby extending the effective life of the wire and improving the stability of the sensor.

[0025] 2. The present invention provides two clamping jaws on the sliding disk to clamp or release the wire by moving the two clamping jaws closer or farther away from each other, and the clamping jaws are arranged in the up and down directions. On the one hand, the clamping jaws can clamp wires with different cross-sectional shapes to improve the applicability of the sensor. On the other hand, the clamping jaws are moved closer or farther away by cooperating with the release section and the buffer section through the up and down sliding clamping jaws. In the process of the sliding disk moving away from each other, the buffer section is used to gradually straighten the wire to avoid the wire from instantly changing from a relaxed state to a straightened state, thereby avoiding deformation or breakage of the wire due to instantaneous large stress, thereby eliminating the influence of the change in wire shape on the sensor accuracy.

[0026] 3. The present invention sets a wire passing plate on the outer side of the sliding plate, and supports the wires through the through holes on the wire passing plate, so that the wires can be as straight as possible in a natural state, thereby making the process of clamping and straightening the wires smoother, thereby shortening the time required for straightening the wires before opening or closing the switch, thereby improving the monitoring efficiency of the sensor, and shortening the movement stroke of the sliding plate, thereby reducing the energy consumption of the motor, thereby improving the energy saving of the sensor; and through the coordination of the tapered structure on the through hole and the installation position of the wiring port, the whole line operation is simplified, making the installation and maintenance of the sensor more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall isometric structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall internal cross-section isometric structure of the present invention;

[0029] Figure 3 For the present invention Figure 2 A magnified schematic diagram of part A;

[0030] Figure 4 A schematic diagram of the positions of the through holes and wiring ports of the present invention;

[0031] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of parts B and C;

[0032] Figure 6 For the present invention Figure 2 The enlarged schematic diagram of part D in the middle;

[0033] Figure 7 This is a schematic diagram of the sliding discs facing each other in the present invention;

[0034] Figure 8 It is a schematic diagram of the sliding disks facing each other in the present invention.

[0035] In the figure: 1. opening / closing coil; 2. upper shell; 21. wire hole; 3. base; 4. Hall element; 5. wiring port; 6. transmission module; 61. lead screw; 62. driven gear; 63. driving gear; 64. motor; 7. slide plate; 71. sliding cavity; 72. clamping claw; 73. spring; 8. cover plate; 81. plate body; 82. slide bar; 821. release section; 822. buffer section; 83. wire plate; 831. through hole. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0037] See also Figures 1 to 8 The present invention provides a high-precision circuit breaker opening and closing time dynamic response sensor, the technical solution is as follows:

[0038] A high-precision circuit breaker opening and closing time dynamic response sensor, used for opening / closing coil 1, includes an upper shell 2, a base 3, a Hall element 4, a wiring port 5, a transmission module 6, a sliding plate 7 and a cover plate 8. The upper shell 2 is designed to be split front and back. After the internal components are assembled, the front and rear parts of the upper shell 2 are connected by bolts. The upper shell 2 has a wiring hole 21; the base 3 is installed at the bottom of the upper shell 2. To ensure the flatness of the bottom surface of the base 3 and improve the stability of the sensor fixation, thereby improving the accuracy of the sensor, the base 3 does not move with the upper shell 2. The Hall element 4 is fixedly mounted inside the upper shell 2 in a variety of fixing methods, such as gluing or clamping. The Hall element 4 is coaxial with the wire hole 21, so that the shell wraps the Hall element 4 evenly, thereby avoiding affecting the monitoring accuracy of the sensor. The wiring port 5 is arranged on the outer surface of the upper shell 2, and the wiring port 5 is electrically connected to the Hall element 4 and the transmission module 6. , outputs the servo information of the transmission module 6 and the voltage signal of the Hall element 4 outward, and transmits current to the Hall element 4 and the transmission module 6 inward; the transmission module 6 passes through the upper shell 2, and the two sliding plates 7 are slidably connected to the base 3, and the two sliding plates 7 are respectively located on the rear and front sides of the upper shell 2, and the cover 8 includes a plate body 81 and a slide bar 82. The two plate bodies 81 are respectively connected to the rear and front sides of the upper shell 2, and the plate body 81 is located on the upper side and left side of the wire hole 21. The upper part of the plate body 81 can prevent dust from directly entering the wire hole 21, and can also prevent The wire of the opening / closing coil 1 below is dust-free, thereby preventing the wire from bringing the dust into the wire hole 21. This keeps the wire hole 21 clean in many ways to ensure the accuracy of the sensor's monitoring of the circuit breaker's opening and closing time. To prevent a large amount of dust from accumulating above the cover 8 and affecting the heat dissipation of the sensor, the upper part of the plate 81 can have a certain slope to allow the dust on the plate 81 to fall naturally. The slide bar 82 is connected to the left side of the plate 81, and the thickness of the slide bar 82 close to the upper shell 2 is greater than the thickness of the slide bar 82 away from the upper shell 2.

[0039] The two sliding plates 7 are driven by the transmission module 6 to move in opposite directions or towards each other at the same time. The two sliding plates 7 moving in opposite directions are pushed by the thicker side of the slide bar 82 to release the opening / closing coil 1, and the two sliding plates 7 moving in opposite directions are separated from the slide bar 82 and clamp the opening / closing coil 1.

[0040] As an embodiment of the present invention, refer to Figure 1 and Figure 2The sliding plate 7 is provided with a sliding cavity 71 along the front-to-back direction. The sliding cavity 71 passes through the sliding plate 7, and a thread is arranged inside the sliding cavity 71. The transmission module 6 includes a screw 61, a driven tooth 62, an active tooth 63 and a motor 64. The screw 61 passes through the upper shell 2 and engages with the threads in the two sliding cavities 71. The screw 61 is mounted inside the upper shell 2 through a pair of bearings to realize its own rotation inside the upper shell 2. The rotation directions of the threads on both sides of the screw 61 are opposite. This method makes the rotation directions of the threads in the sliding cavities 71 of the two sliding plates 7 the same, and makes the rotation directions of the threads at both ends of the screw 61 opposite. This is to standardize the parts of the sensor and make the production process of the two sliding plates 7 consistent. , and make them consistent with the installation relationship of the lead screw 61, thereby facilitating the manufacturing and assembly process of the sensor; the threads on both sides of the lead screw 61 are respectively engaged with the threads in the two sliding cavities 71, and the driven teeth 62 are installed in the middle of the lead screw 61, and the driven teeth 62 are located inside the upper shell 2, and the transmission module 6 is placed inside the upper shell 2, providing a dust-free environment for the operation of the transmission module 6, thereby extending the life of the sensor and making the sensor operation more stable; the driving teeth 63 are engaged with the driven teeth 62, and the output shaft of the motor 64 is inserted into the driving teeth 63. The motor 64 is a micro servo motor that can display real-time torque, and then the degree of straightening of the wire is judged by the torque of the motor 64;

[0041] Before the circuit breaker opens or closes, the motor 64 rotates forward to drive the two sliding plates 7 to move in opposite directions through the lead screw 61. During the movement of the sliding plates 7 in opposite directions, the wire of the opening / closing coil 1 that is drooping is straightened. As the movement in opposite directions progresses, the stress of the wire gradually increases. Accordingly, the resistance to the movement of the sliding plates 7 also gradually increases, thereby increasing the torque of the motor 64. When the torque of the motor 64 increases to the rated value, it means that the wire is fully straightened. At this time, the motor 64 stops rotating forward and then performs the opening or closing action. After the circuit breaker opens or closes, the motor 64 reverses to drive the two sliding plates 7 to move in opposite directions through the lead screw 61, so that the sliding plates 7 return to the origin.

[0042] As an embodiment of the present invention, refer to Figure 3 , a clamping claw 72 is installed on the sliding plate 7, and the number of clamping claws 72 on each sliding plate 7 is two, and the clamping claw 72 slides in the up and down direction on the sliding plate 7, and a spring 73 is installed between the clamping claw 72 and the sliding plate 7. When the sliding plates 7 move toward each other, the clamping claw 72 fits the slide bar 82;

[0043] In this method, the contact portion between the clamp 72 and the wire of the opening / closing coil 1 is designed to be a hemispherical structure, and the hemispherical structure is made of elastic material, so that the contact area with the wire is continuously increased when the clamp 72 is pressed down by the elastic force of the spring 73, thereby increasing the friction between the clamp 72 and the wire, thereby avoiding slipping when the clamp 72 pulls the wire, so that the sensor can operate stably and efficiently; in addition, the clamp 72 needs to be circumferentially positioned when sliding along the sliding plate 7 to avoid the contact portion of the clamp 72 and the slide bar 82 from being offset. For this purpose, in this method, an axial support rod is provided on the clamp 72, and the axial support rod is always inserted into the sliding plate 7 during the sliding process of the clamp 72 to ensure that the clamp 72 does not rotate circumferentially.

[0044] As an embodiment of the present invention, refer to Figure 3 The slider 82 includes a release section 821 and a buffer section 822. The release section 821 and the buffer section 822 are respectively close to and away from the upper shell 2. The length of the release section 821 in the vertical direction is greater than the maximum length of the wire of the opening / closing coil 1 in the vertical direction. The length of the buffer section 822 in the vertical direction gradually decreases in the direction away from the upper shell 2.

[0045] The larger the wire diameter of the opening / closing coil 1, the longer the length of the release section 821 in the vertical direction should be. However, if the length of the release section 821 in the vertical direction is set too large, it will cause greater resistance to the movement of the sliding plate 7, thereby increasing the energy consumption of the motor 64. Therefore, different slide bars 82 should be used for wires with different wire diameters, so the slide bar 82 and the cover plate 8 should be simply detachably connected, such as threaded connection or clamping. In addition, in this method, the slide bar 82 is used in conjunction with the spring 73 to control the sliding of the clamp 72 in the vertical direction, so that both ends of the clamp 72 can be subjected to force, thereby making the movement of the clamp 72 more stable. In addition, a track can be opened on the left side of the cover plate 8 to control the sliding of the clamp 72, but this method is slightly insufficient in the movement stability of the clamp 72.

[0046] As an embodiment of the present invention, refer to Figure 4 and Figure 5 The cover plate 8 also includes a wire-passing plate 83, which is connected to the end of the plate body 81 away from the upper shell 2, and a through hole 831 is opened on the wire-passing plate 83. The through hole 831 is coaxially arranged with the wire hole 21. The two through holes 831 are both configured as a tapered hole structure, and the major diameters of the two through holes 831 are in the same direction. The direction of the major diameter of the through hole 831 is opposite to the direction of the wiring port 5 relative to the upper shell 2;

[0047] When installing the sensor, the rear side of the upper shell 2 is facing the inside of the electrical box, that is, the large diameter end of the through hole 831 is facing backward, and the wiring port 5 is set on the front side of the upper shell 2, so that the wire of the opening / closing coil 1 is passed through the rear side of the upper shell 2 and out from the front side of the upper shell 2, so as to unify the wiring and line arrangement with the wiring port 5 on the front side of the upper shell 2; the shape of the through hole 831 can be set according to the cross-sectional shape of the wire of the opening / closing coil 1. In this method, taking the circular cross-sectional wire as an example, the shape of the through hole is set to be circular; the plate body 81 and the wire plate 83 can be manufactured as a whole by injection molding (when using plastic material) or sheet metal (when using metal material), and then the slide bar 82 suitable for the wire is installed on the plate body 81.

[0048] As an embodiment of the present invention, refer to Figure 6 The length of the sliding cavity 71 along the front-to-back direction is greater than the length of the single-section thread of the screw 61 along the front-to-back direction. Both ends of the sliding cavity 71 are set to a conical structure, and the large-diameter end of the conical structure of the sliding cavity 71 is on the outside; in this method, the two ends of the sliding cavity 71 are set to a conical structure. In addition, the two sides of the threaded section of the screw 61 are reduced in diameter to achieve a similar effect.

[0049] Working Principle: The present invention allows the wire of the opening / closing coil 1 in the wire hole 21 to remain in two states: straightened and relaxed. Before the circuit breaker performs an opening or closing operation, the sliding discs 7 clamp the wire and move in opposite directions to keep the wire straight, thereby preventing the wire from shaking during the process of the sensor detecting the circuit breaker opening and closing time, thereby ensuring the sensor's monitoring accuracy. After the opening or closing operation is completed, the sliding discs 7 release the wire and move in opposite directions to keep the wire relaxed, thereby preventing damage to the wire caused by prolonged tension. This not only extends the wire life and improves the sensor stability, but also prevents the impact of wire deformation on the sensor's monitoring accuracy.

[0050] Specifically, in order to make the sliding plates 7 move in opposite directions or towards each other, a motor 64, a lead screw 61, a driven tooth 62 and a driving tooth 63 are arranged inside the upper shell 2, and the lead screw 61 is driven by the motor 64 to rotate, and threads with opposite rotation directions are arranged on the front and rear sides of the lead screw 61. Therefore, when the lead screw 61 rotates, the two sliding plates 7 respectively engaged with the two sections of the thread are driven to move in opposite directions or towards each other;

[0051] In order to make the slide plates 7 clamp the wire when moving in opposite directions and release the wire when moving in opposite directions, a slide bar 82 is provided on the left side of the cover plate 8, so that when the slide plates 7 move in opposite directions, the release section 821 of the slide plates 7 pushes the upper and lower clamping jaws 72 open to release the clamping jaws 72 from the wire (refer to FIG. Figure 8 When the sliding plate 7 moves in opposite directions, the two clamping jaws 72 are gradually brought closer by the buffer section 822 of the sliding plate 7 to gradually clamp the wire and gradually straighten the wire that droops due to its own weight in the process (refer to Figure 7 );

[0052] In order to make the wire in the wire hole 21 as straight as possible in a relaxed state, so that the movement of the slide plate 7 is smoother, thereby improving the monitoring efficiency of the sensor, and making the movement of the slide plate 7 shorter, thereby improving the energy efficiency of the sensor; a wire plate 83 is provided at the end of the cover plate 8 away from the upper shell 2, and a through hole 831 is provided on the wire plate 83 to provide support for the wire of the opening / closing coil 1 passing through the hole, so that the wire is as straight as possible in a natural state. The tapered structure of the through hole 831 cooperates with the position of the wiring port 5 to make installation and maintenance operations more convenient;

[0053] In order to optimize the wiring process of the sensor and make the installation and maintenance of the sensor more convenient, the two through holes 831 are set as a tapered hole structure with the major diameter facing the same direction, and the major diameter of the through hole 831 is oriented in the opposite direction to the wiring port 5 relative to the upper shell 2. Therefore, the large diameter end of the through hole 831 facilitates the insertion of the wire of the opening / closing coil 1. The wire usually enters from the rear side of the sensor and exits from the front side of the sensor. The side opposite to the major diameter of the through hole 831 is the exit side. The wiring port 5 is also arranged on the exit side, so that subsequent wiring can be carried out on the same side, making the installation and maintenance of the sensor more convenient.

[0054] The cam 71 is provided with a screw thread 61 on the front and rear ends of the cam 71 so that the cam 71 is in the form of a circle, and the cam 71 is provided with a screw thread 61 on the front and rear ends of the cam 71 so that the cam 71 is in the form of a circle.

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision circuit breaker opening and closing time dynamic response sensor, used for an opening / closing coil (1), comprising an upper shell (2), a base (3), a Hall element (4) and a wiring port (5), wherein the upper shell (2) is provided with a wire hole (21), the Hall element (4) is installed inside the upper shell (2), and the Hall element (4) is coaxial with the wire hole (21), and is characterized in that: It also includes a transmission module (6), a sliding plate (7) and a cover plate (8), wherein the transmission module (6) passes through the upper shell (2), the two sliding plates (7) are slidably connected to the base (3), and the two sliding plates (7) are respectively located on the rear side and the front side of the upper shell (2), the cover plate (8) includes a plate body (81) and a slide bar (82), the two plate bodies (81) are respectively connected to the rear side and the front side of the upper shell (2), and the plate body (81) is located on the upper side and the left side of the wire hole (21), the slide bar (82) is connected to the plate body (81) on the left side, and the thickness of the slide bar (82) close to the upper shell (2) is greater than the thickness of the slide bar (82) away from the upper shell (2); The two sliding plates (7) are driven by the transmission module (6) to move in opposite directions or in opposite directions at the same time. The two sliding plates (7) moving in opposite directions are pushed by the thicker side of the slide bar (82) to release the opening / closing coil (1). The two sliding plates (7) moving in opposite directions are separated from the slide bar (82) and clamp the opening / closing coil (1).

2. A high-precision circuit breaker opening and closing time dynamic response sensor according to claim 1, characterized in that: The sliding plate (7) is provided with a sliding cavity (71) along the front-back direction, the sliding cavity (71) passes through the sliding plate (7), and a thread is arranged inside the sliding cavity (71). The transmission module (6) comprises a lead screw (61), a driven tooth (62), a driving tooth (63) and a motor (64). The lead screw (61) passes through the upper shell (2) and meshes with the threads in the two sliding cavities (71), and the threads on both sides of the lead screw (61) have opposite rotation directions. The driven tooth (62) is installed in the middle of the lead screw (61), and the driven tooth (62) is located inside the upper shell (2). The driving tooth (63) meshes with the driven tooth (62), and the output shaft of the motor (64) is inserted into the driving tooth (63).

3. A high-precision circuit breaker opening and closing time dynamic response sensor according to claim 2, characterized in that: A clamping claw (72) is installed on the sliding disk (7), and the number of the clamping claws (72) on each sliding disk (7) is two, and the clamping claws (72) slide in the up and down directions on the sliding disk (7). A spring (73) is installed between the clamping claw (72) and the sliding disk (7), and when the sliding disk (7) moves toward each other, the clamping claw (72) fits the slide bar (82).

4. A high-precision circuit breaker opening and closing time dynamic response sensor according to claim 3, characterized in that: The slide bar (82) comprises a release section (821) and a buffer section (822), wherein the release section (821) and the buffer section (822) are respectively close to and far away from the upper shell (2), the length of the release section (821) in the vertical direction is greater than the maximum length of the wire of the opening / closing coil (1) in the vertical direction, and the length of the buffer section (822) in the vertical direction gradually decreases in a direction away from the upper shell (2).

5. The high-precision circuit breaker opening and closing time dynamic response sensor according to claim 1, characterized in that: The cover plate (8) further comprises a wire-passing plate (83), the wire-passing plate (83) being connected to one end of the plate body (81) away from the upper shell (2), and a through hole (831) being provided on the wire-passing plate (83), the through hole (831) being coaxially arranged with the wire hole (21).

6. A high-precision circuit breaker opening and closing time dynamic response sensor according to claim 5, characterized in that: The two through holes (831) are both configured as tapered hole structures, and the major diameters of the two through holes (831) are oriented in the same direction, and the direction of the major diameters of the through holes (831) is opposite to the direction of the wiring port (5) relative to the upper shell (2).

7. The high-precision circuit breaker opening and closing time dynamic response sensor according to claim 2, characterized in that: The length of the sliding cavity (71) along the front-to-back direction is greater than the length of a single-segment thread of the lead screw (61) along the front-to-back direction.

8. The high-precision circuit breaker opening and closing time dynamic response sensor according to claim 7, characterized in that: Both ends of the sliding cavity (71) are configured as tapered structures, and the large-diameter end of the tapered structure of the sliding cavity (71) is on the outside.

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