A circuit breaker spring detection pressure sensor mounting structure and method

Abstract

This invention relates to the field of power equipment testing technology, specifically providing an installation structure and method for a pressure sensor used in circuit breaker spring testing. The structure includes an inner spring cylinder and an outer spring cylinder. The inner spring cylinder is axially slidably disposed within the outer spring cylinder. The circuit breaker spring is installed within the inner spring cylinder. An adjustment cavity is provided between the bottom of the inner spring cylinder and the bottom of the outer spring cylinder, and the volume of the adjustment cavity is adapted to the thickness of the pressure sensor to accommodate pressure sensors of different thicknesses. This eliminates the need to modify the original circuit breaker structure, solves the problem of pressure sensor installation interference in compact spaces, and avoids changes to the core stress area of ​​the circuit breaker spring after installation. This ensures the normal locking and opening / closing speeds of the spring operating mechanism and prevents equipment malfunction due to the installation of the pressure sensor.

Description

Technical Field

[0001] This invention relates to the field of power equipment testing technology, and in particular to a pressure sensor mounting structure and method for testing circuit breaker springs. Background Technology

[0002] High-voltage circuit breakers, as core equipment ensuring power supply security in power systems, directly affect the stable operation of the power grid through the reliability of their opening and closing actions. The spring-operated mechanism of the circuit breaker is a key actuating component for achieving opening and closing operations. The mechanical properties of the helical circuit breaker spring (such as pressure, stiffness, and deformation) are crucial factors determining the operating mechanism's accuracy, response speed, and service life. Therefore, accurate and stable detection of the pressure parameters of the circuit breaker spring is an important means of assessing the spring's condition, predicting equipment failures, and ensuring the long-term reliable operation of the circuit breaker.

[0003] Currently, pressure sensors are the core components for circuit breaker spring pressure detection, and their detection accuracy and installation stability directly affect the circuit breaker spring performance evaluation results. However, in practical applications, the installation and use of pressure sensors face multiple technical challenges: On the one hand, the spring sleeves of mainstream equipment such as GIS circuit breakers are integrated and compact designs with extremely limited internal space, and no installation position for pressure sensors is reserved during the design phase. If conventional installation methods are used, the size of the pressure sensor is prone to spatial interference with the spring sleeve, and may even change the preload length of the circuit breaker spring, resulting in the operating mechanism failing to lock properly or abnormal opening and closing speeds. On the other hand, the large length-to-diameter ratio of the spiral circuit breaker spring makes it difficult to achieve absolutely vertical compression during compression due to factors such as material uniformity and installation coaxiality. It is prone to lateral bending, causing the pressure sensor to bear eccentric loads. Uneven pressure distribution leads to excessive local pressure, which not only causes measurement inaccuracies but also accelerates the wear of the pressure sensor. Furthermore, the helical structure of the spiral circuit breaker spring determines that its end face will generate torsional motion during compression or elongation. This torsion will cause tangential friction between the end face of the circuit breaker spring and the pressure sensor, which will cause measurement errors due to torsional interference, as well as wear on the surface of the pressure sensor and even torque damage, further affecting the reliability of detection and the service life of the pressure sensor. Summary of the Invention

[0004] Therefore, it is necessary to provide a pressure sensor installation structure and method for circuit breaker spring testing, addressing the problems of insufficient accuracy, poor stability, and frequent pressure sensor replacement in current circuit breaker spring pressure testing methods.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A mounting structure for a pressure sensor used in circuit breaker spring detection includes:

[0007] The spring has an outer cylinder and an inner cylinder, with the inner cylinder axially slidingly disposed inside the outer cylinder. A circuit breaker spring is connected inside the inner cylinder. An adjustment cavity is provided between the bottom of the inner cylinder and the bottom of the outer cylinder, and a pressure sensor is contained within the adjustment cavity. The volume of the adjustment cavity is adapted to the thickness of the pressure sensor.

[0008] Furthermore, the bottom of the inner spring cylinder is provided with a receiving groove, and the bottom of the outer spring cylinder is axially slidably provided with an abutment plate, the space between the abutment plate and the receiving groove forming the adjustment cavity.

[0009] Furthermore, a threaded sleeve is coaxially and fixedly provided at the bottom of the abutment plate, and the threaded sleeve is threadedly connected to the bottom of the spring outer cylinder.

[0010] Furthermore, the pressure sensor is provided with a rotating component, which is configured to drive the pressure sensor to rotate around its own axis when the circuit breaker spring extends or shortens.

[0011] Furthermore, the rotating assembly includes a first unidirectional rotating component and a second unidirectional rotating component, the first unidirectional rotating component and the second unidirectional rotating component rotate in opposite directions, the upper end face of the first unidirectional rotating component is connected to the receiving groove, the lower end face of the first unidirectional rotating component is connected to the upper end face of the pressure sensor, the upper end face of the second unidirectional rotating component is connected to the lower end face of the pressure sensor, and the lower end face of the second unidirectional rotating component is connected to the abutment plate.

[0012] Furthermore, both the first and second unidirectional rotating components are composed of a thrust bearing and a unidirectional rotating disk, with the thrust bearing sleeved on the outer periphery of the unidirectional rotating disk.

[0013] Furthermore, the outer periphery of the thrust bearing is an arc-shaped surface along the axial direction, and the outer periphery of the pressure sensor transitions with the curved surface of the outer periphery of the thrust bearing.

[0014] Furthermore, a transmission rod is connected to the lower end face of the pressure sensor. The transmission rod is coaxially arranged and fixedly connected to the pressure sensor, and a pointer is provided on the transmission rod.

[0015] Furthermore, the inner wall of the spring cylinder includes multiple elastic bars, each of which is elastic. The inner circumference of each elastic bar slides against the circuit breaker spring, and the upper end of each elastic bar is provided with a flange.

[0016] The present invention also provides a method for installing a pressure sensor for detecting circuit breaker springs, comprising the following steps:

[0017] Step S1: First, install the pressure sensor in the adjustment cavity, and adjust the size of the cavity to match the thickness of the pressure sensor.

[0018] Step S2: Subsequently, the operator operates the circuit breaker normally. The circuit breaker spring will be compressed or reset. During the compression or reset of the circuit breaker spring, the inner cylinder of the spring drives the pressure sensor to rotate.

[0019] Step S3: The operator observes the pointer rotation angle. If the pointer rotation angle is less than the preset value, the operator manually drives the transmission rod to rotate.

[0020] The beneficial effects of this invention are:

[0021] This invention addresses the issue of pressure sensor installation interference in compact spaces by setting up an adjustment cavity with a volume adapted to the thickness of the pressure sensor. This allows for the adaptation of pressure sensors of different thicknesses without altering the original circuit breaker structure. The adjustment cavity design avoids the core stress area of ​​the circuit breaker spring, ensuring that the original preload length of the spring remains unchanged after installation. This guarantees the normal locking and opening / closing speeds of the spring operating mechanism and prevents equipment malfunctions caused by the installation of a pressure sensor.

[0022] This invention incorporates a rotating component on the pressure sensor. This component causes the pressure sensor to rotate a certain angle in the same direction each time the circuit breaker spring is compressed and reset. This allows different areas of the pressure sensor to share the load in turn, preventing a single area from bearing eccentric pressure for extended periods. This reduces localized wear and damage caused by excessive pressure, significantly extending the lifespan of the pressure sensor. Furthermore, the rotating component simultaneously counteracts the end-face torsional force during the extension and retraction of the circuit breaker spring, preventing tangential friction between the pressure sensor and the circuit breaker spring. This reduces friction interference with measurement accuracy and prevents torque damage to the pressure sensor, ensuring the stability of the detection data.

[0023] This invention sets the outer periphery of the thrust bearing as an arc-shaped surface, which transitions to the outer curved surface of the pressure sensor. When the spring bends to the side, there will be no hard contact between the receiving groove and the pressure sensor, avoiding additional friction that could affect pressure detection and ensuring that the pressure sensor always accurately collects the axial pressure data of the spring. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the mounting structure of a pressure sensor for detecting a circuit breaker spring according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the mounting structure of a pressure sensor for detecting a circuit breaker spring according to an embodiment of the present invention from another angle.

[0026] Figure 3 for Figure 2 A partial enlarged view of part X of the pressure sensor mounting structure for circuit breaker spring detection provided in one embodiment;

[0027] Figure 4 for Figure 1 A front view of a pressure sensor mounting structure for circuit breaker spring detection provided in one embodiment;

[0028] Figure 5 for Figure 4 A cross-sectional view along AA of the pressure sensor mounting structure for circuit breaker spring detection provided in one embodiment;

[0029] Figure 6 for Figure 5 A partially enlarged view of the Y-section of the pressure sensor mounting structure for circuit breaker spring detection provided in one embodiment;

[0030] Figure 7 A schematic diagram of a circuit breaker spring structure provided in an embodiment of the present invention, showing the mounting structure of a pressure sensor for circuit breaker spring detection.

[0031] Figure 8 This is a schematic diagram of the inner cylinder structure of the pressure sensor mounting structure for circuit breaker spring detection provided in an embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the abutment plate structure of the pressure sensor mounting structure for circuit breaker spring detection provided in an embodiment of the present invention;

[0033] Figure 10 A schematic diagram of the thrust bearing structure of the pressure sensor mounting structure for circuit breaker spring detection provided in an embodiment of the present invention;

[0034] Figure 11 A cross-sectional isometric view of the unidirectional rotating disk portion of the pressure sensor mounting structure for circuit breaker spring detection provided in an embodiment of the present invention.

[0035] Figure 12 An exploded view of a unidirectional rotating disk of a pressure sensor mounting structure for circuit breaker spring detection provided in an embodiment of the present invention.

[0036] in:

[0037] 100. Outer spring cylinder; 110. Inner spring cylinder; 111. Receiving groove; 112. Spring bar; 113. Flange; 120. Circuit breaker spring; 130. Guide rod; 140. Abutment plate; 150. Threaded sleeve; 151. Threaded channel; 152. Nut; 160. Transmission rod; 161. Pointer; 170. Connecting plate; 180. Connecting wire;

[0038] 200, Pressure sensor; 201, Connecting hole; 210, Thrust bearing; 211, Thrust ring; 212, Rolling frame; 220, One-way rotating disk; 230, Rotating frame; 231, Rolling groove; 232, Ball; 233, Spring; 240, Rotating ring; 250, Connecting post; 260, Limiting post. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0040] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] The following reference Figures 1-12 This invention describes a mounting structure for a pressure sensor used for detecting springs in circuit breakers.

[0043] A pressure sensor mounting structure for circuit breaker spring detection is disclosed, suitable for pressure detection of circuit breaker spring 120. In the prior art, a spring outer cylinder 100 is provided on the outer periphery of the circuit breaker spring 120, and an axially sliding guide rod 130 is provided at the upper end of the spring outer cylinder 100. One end of the guide rod 130 is connected to the spring operating mechanism of the circuit breaker body (not shown in the figure), and the other end of the guide rod 130 is connected to the circuit breaker spring 120. A connecting lug is provided at the lower end of the spring outer cylinder 100, and the spring outer cylinder 100 is connected to the circuit breaker body through the connecting lug. When the operator manipulates the spring operating mechanism to control the circuit breaker to turn on or off, the guide rod 130 will move axially to compress or stretch the circuit breaker spring 120. When performing pressure tests on the circuit breaker spring 120 during circuit breaker operation, a pressure sensor 200 needs to be installed inside the spring outer cylinder 100. The pressure sensor 200 is used to detect the pressure of the circuit breaker spring 120 during operation, thereby determining the operating condition of the circuit breaker spring 120. However, when installing the pressure sensor 200, since the spring outer cylinder 100 of mainstream equipment such as circuit breakers is an integrated and compact design with extremely limited internal space, and no installation position for the pressure sensor 200 was reserved during the design phase, if a conventional installation method is adopted, the size of the pressure sensor 200 is prone to spatial interference with the circuit breaker spring 120, or even change the preload length of the circuit breaker spring 120, causing the spring operating mechanism to fail to lock properly or the opening and closing speed to be abnormal, and at the same time affecting the detection results of the pressure sensor 200.

[0044] Based on this, the present invention provides an inner spring cylinder 110 inside the outer spring cylinder 100. The inner spring cylinder 110 is axially slidably disposed inside the outer spring cylinder 100. The circuit breaker spring 120 is located inside the inner spring cylinder 110. The lower end of the circuit breaker spring 120 is fixedly connected inside the inner spring cylinder 110. An adjustment cavity is formed between the bottom of the inner spring cylinder 110 and the bottom of the outer spring cylinder 100. The adjustment cavity contains a pressure sensor 200. When the operator pushes or pulls the guide rod 130 axially through the spring operating mechanism, the circuit breaker spring 120 deforms, thereby causing the pressure sensor 200 in the adjustment cavity at the bottom of the inner spring cylinder 110 to be subjected to pressure. At this time, the pressure sensor 200 can reflect the pressure value of the circuit breaker spring 120, thereby knowing the usage status of the circuit breaker spring 120 and judging whether the working condition of the circuit breaker spring 120 is normal. If the volume of the regulating cavity is small and the thickness of the pressure sensor 200 is large, the circuit breaker spring 120 will be partially compressed, which will affect the detection result of the pressure sensor 200. Therefore, the volume of the regulating cavity in this invention is adapted to the thickness of the pressure sensor 200. That is, when the thickness of the pressure sensor 200 is larger, the volume of the regulating cavity is larger; when the thickness of the pressure sensor 200 is smaller, the volume of the regulating cavity is smaller, thereby accommodating pressure sensors 200 of different sizes.

[0045] It should be noted that adjusting the volume of the cavity does not affect the preload length of the circuit breaker spring 120, ensuring the circuit breaker operates normally and that the pressure sensor 200 can accurately detect the pressure data of the circuit breaker spring 120 during use.

[0046] It should also be noted that the axial sliding arrangement of the inner spring cylinder 110 in this embodiment allows the circuit breaker spring 120 to transmit force to the pressure sensor 200 during normal operation. Specifically, the bottom of the inner spring cylinder 110 in this embodiment is provided with a receiving groove 111, and the bottom of the outer spring cylinder 100 is axially slidably provided with an abutment plate 140. The space between the abutment plate 140 and the receiving groove 111 forms the aforementioned adjustment cavity. When the abutment plate 140 moves axially, the volume of the adjustment cavity can be changed, such as... Figure 5 and Figure 6 As shown, when the abutment plate 140 moves axially upward, the space between the abutment plate 140 and the receiving groove 111 decreases, thereby reducing the volume of the adjusting cavity; when the abutment plate 140 moves axially downward, the space between the abutment plate 140 and the receiving groove 111 increases, thereby increasing the volume of the adjusting cavity. Therefore, the volume of the adjusting cavity can be changed according to the size of the pressure sensor 200 to accommodate pressure sensors 200 of different sizes. The greater the downward distance of the abutment plate 140, the larger the volume of the adjusting cavity, allowing for the installation of a thicker pressure sensor 200; the greater the upward distance of the abutment plate 140, the smaller the volume of the adjusting cavity. Since the receiving groove 111 at the bottom of the spring inner cylinder 110 bulges upward, and the bottom end of the circuit breaker spring 120 passes through the outer periphery of the receiving groove 111, the setting of the receiving groove 111 does not affect the preload length of the circuit breaker spring 120, nor does it affect the detection result of the pressure sensor 200.

[0047] More specifically, in order to enable the abutment plate 140 to move along its own axis, a threaded sleeve 150 is coaxially and fixedly connected to the bottom of the abutment plate 140. The threaded sleeve 150 is threadedly connected to the bottom of the spring outer cylinder 100. When the threaded sleeve 150 rotates around its own axis, it can move along its own axis, thereby adjusting the position of the abutment plate 140 to change the space between the abutment plate 140 and the receiving groove 111.

[0048] It should be noted that, in this embodiment, the bottom of the spring outer cylinder 100 is provided with a threaded channel 151, the threaded sleeve 150 at the bottom of the abutment plate 140 is threadedly connected to the threaded channel 151, and a nut 152 is also threadedly connected to the threaded sleeve 150. After the operator adjusts the position of the abutment plate 140 according to the thickness of the pressure sensor 200, the nut 152 is tightened so that the nut 152 abuts against the edge of the threaded channel 151, thereby fixing the position of the threaded sleeve 150. In other words, the position of the abutment plate 140 is fixed to ensure the structural stability during the testing process.

[0049] It should be noted that the circuit breaker spring 120, with its large length-to-diameter ratio, is difficult to achieve absolutely vertical compression during compression due to factors such as material uniformity and installation coaxiality. It is prone to lateral bending, causing the pressure sensor 200 to bear eccentric loads. Uneven pressure distribution leads to excessive local pressure, which not only causes measurement inaccuracies but also accelerates the wear and tear of the pressure sensor 200. Furthermore, the helical structure of the circuit breaker spring 120 means that its end face will generate torsional motion during compression or elongation. This torsion will cause tangential friction between the end face of the circuit breaker spring 120 and the pressure sensor 200. This torsional force will cause measurement errors, wear on the surface of the pressure sensor 200, and even torque damage, further affecting the reliability of detection and the service life of the pressure sensor 200.

[0050] Therefore, the present invention provides a rotating component on the pressure sensor 200. The rotating component is configured to drive the pressure sensor 200 to rotate when the circuit breaker spring 120 extends or shortens, thereby continuously adjusting the position of the pressure sensor 200. When the circuit breaker spring 120 bends laterally, it will apply a large pressure to a local area of ​​the pressure sensor 200. If the position of the pressure sensor 200 is not changed for a long time, the measurement accuracy of the pressure sensor 200 will decrease. Therefore, each time the circuit breaker spring 120 extends or shortens, the pressure sensor 200 will rotate by a certain angle, allowing different stress areas of the pressure sensor 200 to share the load in turn, avoiding a single area from bearing concentrated pressure for a long time, and effectively extending the service life of the pressure sensor 200.

[0051] Specifically, the rotating assembly in this embodiment includes a first one-way rotating component and a second one-way rotating component. The upper end face of the first one-way rotating component is connected to the receiving groove 111, and the lower end face of the first one-way rotating component is connected to the upper end face of the pressure sensor 200. The upper end face of the second one-way rotating component is connected to the lower end face of the pressure sensor 200, and the lower end face of the second one-way rotating component is connected to the abutment plate 140. The first one-way rotating component and the second one-way rotating component allow the pressure sensor 200 to rotate in opposite directions. When the circuit breaker spring 120 is compressed and drives the inner spring cylinder 110 to rotate, the receiving groove 111 drives the pressure sensor 200 to rotate through the first one-way rotating component. At this time, the second one-way rotating component rotates relative to the pressure sensor 200. When the circuit breaker spring 120 is reset, the second one-way rotating component restricts the rotation of the pressure sensor 200. At this time, the first one-way rotating component rotates relative to the pressure sensor 200. Each time the circuit breaker spring 120 is compressed and reset once, it will rotate in the same direction by a certain angle.

[0052] In one embodiment of the present invention, the upper end of the circuit breaker spring 120 is fixed to the guide rod 130, and the lower end of the circuit breaker spring 120 is connected to the lower end of the spring inner cylinder 110. When the circuit breaker spring 120 is compressed, since the upper end cannot rotate around its own axis, the lower end can drive the spring inner cylinder 110 to rotate. Furthermore, the circuit breaker spring 120 is a left-handed spring (viewed from one end of the circuit breaker spring 120, the coil spirals upwards in a counter-clockwise direction). When the circuit breaker spring 120 is compressed, in... Figure 6 Looking from top to bottom, the spring rotates clockwise. Since the receiving groove 111 on the inner spring cylinder 110 is connected to the upper end face of the first one-way rotating member, and a first one-way rotating member that can only rotate counterclockwise and a second one-way rotating member that can only rotate clockwise are used, the first one-way rotating member cannot rotate clockwise, and the second one-way rotating member cannot rotate counterclockwise. When the inner spring cylinder 110 rotates clockwise, it drives the pressure sensor 200 to rotate clockwise synchronously through the first one-way rotating member that can only rotate counterclockwise. The second one-way rotating member does not affect the rotation of the pressure sensor 200. When the left-hand circuit breaker spring 120 resets, it drives the inner spring cylinder 110 to rotate counterclockwise to reset. Since the second one-way rotating member can only rotate clockwise, it restricts the counterclockwise rotation of the pressure sensor 200. At this time, the first one-way rotating member is allowed to rotate counterclockwise, so it does not affect the counterclockwise rotation of the inner spring cylinder 110. Every time the left-hand circuit breaker spring 120 is compressed and reset, the pressure sensor 200 will rotate a certain angle clockwise.

[0053] In one embodiment of the present invention, the circuit breaker spring 120 is a right-hand coil spring (viewed from one end of the circuit breaker spring 120, the coil spirals upwards in a clockwise direction), and when the circuit breaker spring 120 is compressed, Figure 6 Looking from top to bottom, the spring rotates counterclockwise. Since the receiving groove 111 on the inner spring cylinder 110 is connected to the upper end face of the first one-way rotating member, and a first one-way rotating member that can only rotate clockwise and a second one-way rotating member that can only rotate counterclockwise are used, the first one-way rotating member cannot rotate counterclockwise, and the second one-way rotating member cannot rotate clockwise. When the inner spring cylinder 110 rotates counterclockwise, it drives the pressure sensor 200 to rotate counterclockwise synchronously through the first one-way rotating member that can only rotate clockwise. The second one-way rotating member does not affect the rotation of the pressure sensor 200. When the right-hand circuit breaker spring 120 resets, it drives the inner spring cylinder 110 to rotate clockwise to reset. Since the second one-way rotating member can only rotate counterclockwise, it restricts the clockwise rotation of the pressure sensor 200. At this time, the first one-way rotating member is allowed to rotate clockwise, so it does not affect the clockwise rotation of the inner spring cylinder 110. Every time the right-hand circuit breaker spring 120 is compressed and reset, the pressure sensor 200 will rotate counterclockwise by a certain angle.

[0054] It should be noted that, in other embodiments of the present invention, the left-hand circuit breaker spring 120 may also be equipped with a first unidirectional rotating member that can only rotate clockwise and a second unidirectional rotating member that can only rotate counterclockwise, so that when the left-hand circuit breaker spring 120 is reset, it drives the pressure sensor 200 to rotate synchronously, while when it is compressed, the pressure sensor 200 does not rotate synchronously; the right-hand circuit breaker spring 120 may also be equipped with a first unidirectional rotating member that can only rotate counterclockwise and a second unidirectional rotating member that can only rotate clockwise, so that when the right-hand circuit breaker spring 120 is reset, it drives the pressure sensor 200 to rotate synchronously, while when it is compressed, the pressure sensor 200 does not rotate synchronously.

[0055] In a further embodiment, both the first and second unidirectional rotating components of the present invention are composed of a thrust bearing 210 and a unidirectional rotating disk 220. The thrust bearing 210 is sleeved on the outer periphery of the unidirectional rotating disk 220, and the structure of the thrust bearing 210 is as follows: Figure 10 As shown, the thrust bearing 210 is existing technology. The thrust bearing 210 consists of two upper and lower thrust rings 211 and a middle rolling frame 212. The one-way rotating disk 220 includes a rotating frame 230 and a rotating ring 240. Multiple rolling grooves 231 are evenly distributed circumferentially on the upper surface of the rotating frame 230. The rolling grooves 231 are arc-shaped, and the depth varies at different positions within a single rolling groove 231, specifically becoming deeper or shallower circumferentially. The rolling grooves 231 are filled with balls 232 and spring pieces 233. The spring pieces 233 are located at the deeper end of the rolling groove 231, while the balls 232 are located near the shallower end. The rotating ring 240 is rotatably connected to the upper surface of the rotating frame 230 and rolls in contact with the balls 232. If... As the depth of the rolling groove 231 gradually decreases in the clockwise direction, the rotating ring 240 can only rotate counterclockwise around its own axis. When the rotating ring 240 rotates clockwise around its own axis, it will cause the ball 232 to roll towards the shallower end within the rolling groove 231. Since the rotating ring 240 is restricted to the rotating frame 230 and cannot move axially, the rotating ring 240 cannot rotate clockwise. When the rotating ring 240 rotates counterclockwise, it will push the ball 232 to compress the spring 233 and move towards the deeper end. At this time, the ball 232 does not hinder the counterclockwise rotation of the rotating ring 240. Similarly, if the rotating ring 240 can only rotate clockwise around its own axis, it is only necessary to gradually decrease the depth of the rolling groove 231 in the counterclockwise direction. This will not be elaborated further here.

[0056] It should be noted that, in this embodiment, multiple connecting posts 250 are vertically and fixedly arranged on the upper surface of the rotating ring 240. The multiple connecting posts 250 are axially slidably inserted into the receiving groove 111 of the inner spring cylinder 110. A connecting hole 201 is opened on the top of the inner cavity of the receiving groove 111. The connecting posts 250 are inserted into the connecting hole 201, thereby connecting the rotating ring 240 with the top of the inner cavity of the receiving groove 111, ensuring that the inner spring cylinder 110 drives the rotating ring 240 to rotate synchronously. Multiple connecting posts 250 are also vertically and fixedly arranged on the lower surface of the rotating frame 230. A connecting hole 201 is opened on both the upper and lower surfaces of the pressure sensor 200. The multiple connecting posts 250 are axially slidably inserted into the connecting hole 201 on the upper surface of the pressure sensor 200. The connecting post 250 on the rotating ring 240 of the lower one-way rotating disk 220 is axially slidably inserted into the abutment disk 140, and the connecting post 250 on the rotating frame 230 of the lower one-way rotating disk 220 is axially slidably inserted into the lower end face of the pressure sensor 200. The setting of the one-way rotating disk 220 enables the pressure sensor 200 to rotate a certain angle when the circuit breaker spring 120 extends and retracts.

[0057] It should also be noted that, such as Figure 12 As shown, in this embodiment, the outer periphery of the rotating ring 240 is provided with an annular groove, and multiple limiting posts 260 are evenly arranged on the inner periphery of the rotating frame 230. The multiple limiting posts 260 are located in the annular groove, thereby restricting the axial movement of the rotating ring 240. The rotating ring 240 can only rotate around its own axis.

[0058] In a further embodiment, the outer peripheries of the two thrust bearings 210 are axially curved surfaces, and the outer periphery of the pressure sensor 200 transitions with the curved surface of the outer periphery of the thrust bearings 210. This avoids the pressure sensor 200 being squeezed by the receiving groove 111 when the circuit breaker spring 120 bends laterally. Figure 6 As shown, when the middle part of the circuit breaker spring 120 bends to the left, the pressure on the left and right sides of the bottom of the circuit breaker spring 120 will be different. If there is no arc surface, the inner wall of the receiving groove 111 will abut against the outer periphery of the pressure sensor 200, causing friction between the inner wall of the receiving groove 111 and the outer periphery of the pressure sensor 200, which will affect the pressure detection of the circuit breaker spring 120. Specifically, it will cause the pressure value detected by the pressure sensor 200 to be smaller. When an arc surface is provided, there is a certain gap between the inner wall of the receiving groove 111 and the outer periphery of the pressure sensor 200, so that when the inner cylinder 110 of the spring is tilted, the inner wall of its receiving groove 111 will hardly contact the outer periphery of the pressure sensor 200, thereby avoiding affecting the detection accuracy of the pressure sensor 200.

[0059] It should be noted that in this embodiment, the center of the arc-shaped surface on the outer periphery of the pressure sensor 200 coincides with the center of the inclined inner spring cylinder 110, thereby avoiding contact between the inner wall of the receiving groove 111 and the outer periphery of the pressure sensor 200.

[0060] In a further embodiment, a transmission rod 160 is provided on the lower end face of the pressure sensor 200 of the present invention. The transmission rod 160 is coaxial and fixedly disposed on the lower end face of the pressure sensor 200. When the pressure sensor 200 rotates, it will drive the transmission rod 160 to rotate synchronously. The outer circumference of the transmission rod 160 is rotatably connected to the threaded sleeve 150. A pointer 161 is provided on one end of the transmission rod 160 that extends out of the threaded sleeve 150. When the transmission rod 160 rotates, it can drive the pointer 161 to rotate synchronously. The setting of the pointer 161 allows the operator to clearly observe the rotation angle of the pressure sensor 200.

[0061] It should be noted that, in order to make the transmission rod 160 rotate synchronously with the pressure sensor 200, the upper end face of the transmission rod 160 in this embodiment is coaxially and fixedly provided with a connecting plate 170. The connecting plate 170 has multiple connecting holes 201, which allow the connecting post 250 on the unidirectional rotating disk 220 to pass through, thereby making the connecting plate 170 rotate synchronously with the pressure sensor 200, which in turn makes the transmission rod 160 on the connecting plate 170 rotate synchronously with the pressure sensor 200.

[0062] Specifically, in this embodiment, the transmission rod 160 is hollow inside, allowing the connection line 180 of the pressure sensor 200 to pass through. The electrical connection end of the connection line 180 can be connected by magnetic adsorption or rotation to prevent the connection line 180 from twisting. Furthermore, a wireless receiver (not shown in the figure) and a transmitter (not shown in the figure) are provided inside the end of the transmission rod 160 that extends out of the threaded sleeve 150 to facilitate the transmission of the pressure sensor 200 signal.

[0063] In a further embodiment, to enable the operator to determine whether the circuit breaker spring 120 is tilted, the side wall of the inner spring cylinder 110 in this embodiment includes multiple elastic strips 112. The multiple elastic strips 112 surround and form the side wall of the inner spring cylinder 110, and the lower ends of the multiple elastic strips 112 are fixedly connected together. The upper ends of the multiple elastic strips 112 are independent of each other, and each of the multiple elastic strips 112 is elastic. The inner circumference of the multiple elastic strips 112 slides against the outer circumference of the circuit breaker spring 120. If the circuit breaker spring 120 is tilted... When the circuit breaker spring 120 bends, it will push one or more of the multiple spring bars 112, causing the multiple spring bars 112 to undergo elastic deformation. In this embodiment, the upper end of the multiple spring bars 112 is provided with a flange 113. When the spring bar 112 deforms, the flange 113 at its upper end will move radially outward along the inner cylinder 110 of the spring. The operator can determine whether the circuit breaker spring 120 has bends by observing the position of the flange 113, and can also know the direction of the bend of the circuit breaker spring 120.

[0064] It should be noted that in this embodiment, there is a gap between the outer spring cylinder 100 and the inner spring cylinder 110, thereby allowing the elastic bar 112 of the inner spring cylinder 110 to deform.

[0065] It is understandable that when the operator observes the movement of the flange 113 of the spring bar 112, it indicates that the circuit breaker spring 120 has bent laterally. The operator observes the pointer 161 on the transmission rod 160. The pointer 161 will rotate a certain angle when the circuit breaker spring 120 extends or shortens. This means that when the circuit breaker spring 120 extends or shortens, it will drive the pressure sensor 200 to rotate, thereby making the pressure sensor 200 evenly stressed. If the angle of rotation of the pointer 161 is small (for example, the degree of extension or contraction of the circuit breaker spring 120 is small, the angle of rotation of the pointer 161 is small), the operator can manually rotate the transmission rod 160, so that the transmission rod 160 drives the pressure sensor 200 to rotate through the connecting plate 170, thereby increasing the rotation angle of the pressure sensor 200. This allows the area of ​​the pressure sensor 200 that originally bore the eccentric load to be removed from the high-pressure state in time, so that different stress areas take turns to share the load, avoiding component fatigue or damage caused by long-term concentrated pressure in a single area, and significantly extending the service life of the pressure sensor 200.

[0066] The specific installation process of the pressure sensor mounting structure for circuit breaker spring detection provided by the present invention will be described in conjunction with the above embodiments:

[0067] Install:

[0068] First, install the pressure sensor 200 on the abutment plate 140 and install two one-way rotating discs 220. Then, install the inner spring cylinder 110 into the outer spring cylinder 100. The top of the inner spring cylinder 110's receiving groove 111 is connected to the one-way rotating disc 220 above. Finally, rotate the threaded sleeve 150. The threaded sleeve 150 is used to adjust the space between the abutment plate 140 and the receiving groove 111 so that the installation of the pressure sensor 200 does not affect the preload length of the circuit breaker spring 120. This ensures that the preload length of the circuit breaker spring 120 after the pressure sensor 200 is installed is the same as the preload length of the circuit breaker spring 120 before the pressure sensor 200 is installed, thus not affecting the normal use of the circuit breaker spring 120.

[0069] When the operator normally switches the circuit breaker, the circuit breaker spring 120 will extend and retract. Since the upper end of the circuit breaker spring 120 is fixedly connected to the guide rod 130, and the guide rod 130 cannot rotate around its own axis, when the circuit breaker spring 120 is compressed, the lower end will drive the inner spring cylinder 110 to rotate around its own axis. Since the upper and lower end faces of the pressure sensor 200 are both provided with one-way rotating disks 220, and the rotation directions of the one-way rotating disks 220 are opposite, when the inner spring cylinder 110 rotates in one direction, it will drive the pressure sensor 200 to rotate synchronously. When the inner spring cylinder 110 rotates in the opposite direction, the pressure sensor 200 does not rotate. This achieves the function of making the pressure sensor 200 rotate a certain angle with each extension and retraction of the circuit breaker spring 120, avoiding the pressure sensor 200 being subjected to localized force and increasing the service life of the pressure sensor 200.

[0070] If the flange 113 of the inner wall spring strip 112 of one or more circuit breaker springs 120 moves radially outward along the inner spring cylinder 110, it indicates that the circuit breaker spring 120 is bending. Since the outer periphery of the pressure sensor 200 and the outer periphery of the two unidirectional rotating disks 220 are both arc-shaped surfaces, the receiving groove 111 of the inner spring cylinder 110 is tilted relative to the pressure sensor 200, and the inner wall of the receiving groove 111 does not contact the outer periphery of the pressure sensor 200, thereby reducing the impact on the pressure sensor 200. The operator can record the data of the bending phenomenon, and these data can be removed when calculating the average value later, thereby improving the pressure detection accuracy of the circuit breaker spring 120.

[0071] If the angle of rotation of pointer 161 is found to be small, the transmission rod 160 is manually rotated. The transmission rod 160 drives the pressure sensor 200 to rotate through the connecting plate 170, thereby increasing the rotation angle of the pressure sensor 200. This allows the area of ​​the pressure sensor 200 that was originally bearing the eccentric load to be removed from the high pressure state in time, so that different stress areas can share the load in turn. This avoids component fatigue or damage caused by long-term concentrated pressure in a single area, and significantly extends the service life of the pressure sensor 200.

[0072] The present invention also provides a method for installing a pressure sensor for detecting circuit breaker springs, comprising the following steps:

[0073] Step S1: First, install the pressure sensor 200 in the adjustment cavity, and make sure the size of the adjustment cavity matches the thickness of the pressure sensor 200.

[0074] The adjustment cavity is adjusted by rotating the threaded sleeve 150. The space between the receiving groove 111 and the abutment plate 140 is the adjustment cavity. When the threaded sleeve 150 rotates, it adjusts the space between the abutment plate 140 and the receiving groove 111, so that the space between the receiving groove 111 and the abutment plate 140 can accommodate the pressure sensor 200 and ensure that the preload length of the circuit breaker spring 120 is within the normal operating range. In other words, the installation of the pressure sensor 200 will not affect the preload length of the circuit breaker spring 120, and thus will not affect the normal operation of the circuit breaker.

[0075] Step S2: Subsequently, the operator operates the circuit breaker switch normally. The circuit breaker spring 120 will be compressed or reset. During the compression or reset of the circuit breaker spring 120, the inner cylinder 110 of the spring drives the pressure sensor 200 to rotate.

[0076] When the operator normally operates the circuit breaker switch, the circuit breaker spring 120 will be compressed or reset. Since the upper end of the circuit breaker spring 120 is connected to the guide rod 130, and the guide rod 130 cannot rotate around its own axis, the lower end of the circuit breaker spring 120 will rotate around its own axis during the extension and retraction process. The lower end of the circuit breaker spring 120 is connected to the inner spring cylinder 110. When the lower end of the circuit breaker spring 120 rotates, it drives the inner spring cylinder 110 to rotate synchronously. The top end of the receiving groove 111 of the inner spring cylinder 110 is connected to the pressure sensor 200. Two one-way rotating disks 220 are respectively provided on the upper and lower end faces of the pressure sensor 200. The two one-way rotating disks 220 are allowed to rotate in opposite directions, so that the pressure sensor 200 can only rotate in one direction, ensuring that the pressure sensor 200 is subjected to uniform force.

[0077] Step S3: The operator observes the rotation angle of pointer 161. If the rotation angle of pointer 161 is less than the preset value, the operator manually drives the transmission rod 160 to rotate.

[0078] If the operator finds that the rotation angle of the pointer 161 is less than the preset value (the preset value is the minimum angle threshold for manually adjusting the rotation of the pressure sensor 200), the operator can manually (using a wrench or other equipment) drive the transmission rod 160 to rotate, thereby driving the pressure sensor 200 to rotate, thus increasing the rotation angle of the pressure sensor 200. This allows the area of ​​the pressure sensor 200 that was originally bearing the eccentric load to be removed from the high pressure state in time, so that different stress areas can share the load in turn, avoiding component fatigue or damage caused by long-term concentrated pressure in a single area, and significantly extending the service life of the pressure sensor 200.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A pressure sensor mounting structure for a circuit breaker spring detection, characterized by, include: The spring has an outer cylinder and an inner cylinder, the inner cylinder being axially slidably disposed inside the outer cylinder, a circuit breaker spring being connected inside the inner cylinder, and an adjustment cavity being provided between the bottom of the inner cylinder and the bottom of the outer cylinder, the adjustment cavity containing a pressure sensor, the volume of the adjustment cavity being adapted to the thickness of the pressure sensor. The bottom of the inner spring cylinder is provided with a receiving groove, and the bottom of the outer spring cylinder is axially slidably provided with an abutment plate. The space between the abutment plate and the receiving groove forms the adjustment cavity. The pressure sensor is provided with a rotating component, which is configured to drive the pressure sensor to rotate around its own axis when the circuit breaker spring extends or shortens. The rotating assembly includes a first unidirectional rotating component and a second unidirectional rotating component. The first unidirectional rotating component and the second unidirectional rotating component rotate in opposite directions. The upper end face of the first unidirectional rotating component is connected to the receiving groove, the lower end face of the first unidirectional rotating component is connected to the upper end face of the pressure sensor, the upper end face of the second unidirectional rotating component is connected to the lower end face of the pressure sensor, and the lower end face of the second unidirectional rotating component is connected to the abutment plate. Both the first and second one-way rotating components are composed of a thrust bearing and a one-way rotating disk, with the thrust bearing sleeved on the outer periphery of the one-way rotating disk; The outer periphery of the thrust bearing is an arc-shaped surface along the axial direction, and the outer periphery of the pressure sensor transitions to the curved surface of the outer periphery of the thrust bearing; A transmission rod is connected to the lower end face of the pressure sensor. The transmission rod is coaxially arranged and fixedly connected to the pressure sensor, and a pointer is provided on the transmission rod.

2. The pressure sensor mounting structure for a circuit breaker spring inspection according to claim 1, characterized by The bottom of the abutment plate is coaxially and fixedly provided with a threaded sleeve, which is threadedly connected to the bottom of the spring outer cylinder.

3. The pressure sensor mounting structure for a circuit breaker spring inspection according to claim 1, characterized by The inner wall of the spring cylinder includes multiple elastic bars, each of which is elastic. The inner circumference of each elastic bar slides against the circuit breaker spring, and the upper end of each elastic bar is provided with a flange.

4. A pressure sensor mounting method for a circuit breaker spring detection, adapted to the pressure sensor mounting structure for a circuit breaker spring detection according to any one of claims 1 to 3, characterized by, Includes the following steps: Step S1: First, install the pressure sensor in the adjustment cavity, and adjust the size of the cavity to match the thickness of the pressure sensor. Step S2: Subsequently, the operator operates the circuit breaker normally. The circuit breaker spring will be compressed or reset. During the compression or reset of the circuit breaker spring, the inner cylinder of the spring drives the pressure sensor to rotate. Step S3: The operator observes the pointer rotation angle. If the pointer rotation angle is less than the preset value, the operator manually drives the transmission rod to rotate.

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