Circuit breaker and switching-on and switching-off operation work adjusting method thereof

Abstract

The invention relates to a circuit breaker and a switching-on and switching-off operation power adjusting method thereof. The circuit breaker comprises a main crank arm, an opening chain, a closing lock catch device and a spring operating mechanism. The main crank arm is connected with the opening chain, and the closing lock catch device is in unlocking connection with the main crank arm. The spring operating mechanism comprises an energy storage spring, an operating power adjusting mechanism and a pressure sensor, the energy storage spring is compressed under the traction of the opening chain, and when the main crank arm is in an unlocking state, the energy storage spring can rebound and pull the opening chain so as to drive the output shaft to rotate to a theoretical opening position. The pressure sensor is connected with the energy storage spring and used for monitoring the pressure value of the energy storage spring in real time, and the operation work adjusting mechanism is connected with the energy storage spring and used for adjusting the pressure value of the energy storage spring. The operating power adjusting mechanism of the circuit breaker can timely adjust the compression amount of the energy storage spring according to the pressure value, so that the energy storage spring can be always maintained within the preset pressure range, and the opening and closing phase selection precision of the circuit breaker is improved.

Description

Technical Field

[0001] The present application relates to the technical field of high-voltage switchgear, and in particular to a circuit breaker and a method for adjusting the opening and closing operation work thereof. Background Art

[0002] Phase-selective circuit breakers generally use the power provided by the energy storage spring of the spring operating mechanism to complete the opening and closing phase selection operation of the circuit breaker. Due to its low cost, it is widely used in high-voltage switchgear. For high-voltage switchgear, the opening and closing operation stability of the spring operating mechanism is crucial.

[0003] However, the phase-selective circuit breaker in the related art is affected by many factors such as the energy storage level of the mechanism, transmission status, control voltage, ambient temperature or the number of opening and closing operations, and the opening and closing operation stability of the spring operating mechanism of the phase-selective circuit breaker is relatively low, resulting in a decrease in the opening and closing phase selection accuracy. Summary of the invention

[0004] Based on this, it is necessary to provide a circuit breaker and a method for adjusting its opening and closing operation power to address the problem that the opening and closing operation stability of the spring operating mechanism of the phase-selective circuit breaker in the related technology is low, resulting in reduced opening and closing phase selection accuracy.

[0005] In one aspect, the present application provides a circuit breaker, comprising:

[0006] Main crutches;

[0007] A breaking chain, the main crank arm is connected to the breaking chain;

[0008] A closing lock device, wherein the closing lock device is unlockably connected to the main crank arm, and the main crank arm can be pulled by the opening chain to drive the output shaft of the main crank arm to rotate when the main crank arm is unlocked by the closing lock device;

[0009] A spring operating mechanism, wherein the spring operating mechanism comprises an energy storage spring, an operating work adjustment mechanism and a pressure sensor, wherein the energy storage spring is connected to the opening chain and is compressed under the traction of the opening chain, and when the main crank arm is unlocked by the closing lock device, the energy storage spring can rebound and pull the opening chain to drive the output shaft to rotate to a theoretical opening position, the pressure sensor is connected to the energy storage spring and is used to monitor the pressure value of the energy storage spring in real time, and the operating work adjustment mechanism is connected to the energy storage spring and is used to adjust the pressure value of the energy storage spring.

[0010] When the above-mentioned circuit breaker is in use, the operating work adjustment mechanism can timely adjust the compression amount of the energy storage spring according to the pressure value of the energy storage spring monitored in real time by the pressure sensor, so that the energy storage spring can always be maintained within the preset pressure range, and then meet the tension requirement of the main crank arm being pulled by the opening chain to open the switch, thereby improving the phase selection accuracy of the circuit breaker. Specifically, when the main crank arm is locked by the closing lock device and remains stationary, a preset pressure range can be set for the pressure sensor, and the pressure sensor monitors the actual pressure value of the energy storage spring in real time and compares it with the above-mentioned preset pressure range. If the actual pressure value exceeds the preset pressure range, the operating work adjustment mechanism can timely adjust the pressure value of the energy storage spring, and the actual pressure value of the pressure sensor is always maintained within the preset pressure range, and then the tension of the opening chain is always maintained within the preset pressure range, so that the rotational force requirement of the main crank arm is met during the next opening operation, and the phase selection accuracy of the opening and closing is improved.

[0011] In one embodiment, the operating work adjustment mechanism includes a driver, a transmission worm and a turbine, the driver is drivingly connected to the transmission worm, the transmission worm is transmission-connected to the turbine, the turbine is transmission-connected to the pressure sensor along the compression direction of the energy storage spring, and the pressure sensor can move back and forth under the threaded drive of the turbine to adjust the compression amount of the energy storage spring.

[0012] In one embodiment, the turbine includes a first transmission section and a second transmission section along its rotation axis direction, the first transmission section is connected to the transmission worm along its circumferential outer wall, the pressure sensor is sleeved on the second transmission section and is threadedly connected to the inner wall of the second transmission section, when the first transmission section is driven by the worm to rotate forward and reverse, the second transmission section can drive the pressure sensor to move back and forth along the compression direction of the energy storage spring.

[0013] In one embodiment, the first transmission section and the second transmission section are in a stage shape, and the second transmission section has an abutment end surface, and the abutment end surface can abut against the pressure sensor along the compression direction of the energy storage spring to limit the movement of the pressure sensor.

[0014] In one of the embodiments, the spring operating mechanism further includes a positioning sleeve, the pressure sensor is embedded in the positioning sleeve, and the circumferential side surfaces of the pressure sensor around the compression direction of the energy storage spring are polyhedral, and each side surface is in contact with the inner wall of the positioning sleeve.

[0015] In one of the embodiments, the spring operating mechanism further includes an upper bearing and a lower bearing, wherein the upper bearing and the lower bearing are respectively abutted against two sides of the turbine along the compression direction of the energy storage spring, and the upper bearing and the lower bearing are clamped on the positioning sleeve.

[0016] In one embodiment, the pressure sensor is sleeve-shaped and has a central opening, the opening chain passes through the central opening and is connected to one end of the energy storage spring away from the pressure sensor, one end of the pressure sensor abuts against the other end of the energy storage spring along the compression direction of the energy storage spring, and the other end is movably connected to the operating work adjustment mechanism.

[0017] In one embodiment, the circuit breaker further includes a stroke angle output sensor, a mechanical characteristic monitoring device and a fault warning terminal, the stroke angle output sensor is connected to the energy storage spring and is used to monitor the actual speed-time mechanical characteristics of the energy storage spring, the mechanical characteristic monitoring device is used to set a preset speed-time mechanical characteristic range of the energy storage spring, the mechanical characteristic monitoring device is connected to the fault warning terminal signal, when the actual speed-time mechanical characteristic exceeds the preset speed-time mechanical characteristic range, the mechanical characteristic monitoring device sends an adjustment signal to the fault warning terminal, so that the fault warning terminal sends an adjustment instruction to the operating work adjustment mechanism, and the operating work adjustment mechanism adjusts the pressure value of the energy storage spring until the actual speed-time mechanical characteristic falls within the preset speed-time mechanical characteristic range.

[0018] On the other hand, the present application also provides a method for adjusting the opening and closing operation work, which is applied to the above-mentioned circuit breaker and includes the following steps:

[0019] Setting a preset pressure range to a pressure sensor;

[0020] The pressure sensor monitors the actual pressure value of the energy storage spring;

[0021] If the actual pressure value exceeds the preset pressure range, the operating work adjustment mechanism adjusts the pressure value of the energy storage spring so that the actual pressure value of the pressure sensor is always maintained within the preset pressure range.

[0022] In the above-mentioned method for adjusting the operating work of opening and closing, the operating work adjustment mechanism can timely adjust the compression amount of the energy storage spring according to the pressure value of the energy storage spring monitored in real time by the pressure sensor, so that the energy storage spring can always be maintained within the preset pressure range, thereby meeting the tension requirement of the main crank arm being pulled by the opening zipper to open the switch, thereby improving the opening and closing phase selection accuracy of the circuit breaker.

[0023] In one embodiment, the circuit breaker further includes a travel angle output sensor, a mechanical characteristic monitoring device and a fault warning terminal, and the method for adjusting the opening and closing operation work further includes the following steps before setting the preset pressure range for the pressure sensor:

[0024] Setting a preset speed-time mechanical characteristic range of the energy storage spring to the mechanical characteristic monitoring device;

[0025] The mechanical characteristic monitoring device monitors the actual speed-time mechanical characteristic of the energy storage spring;

[0026] If the actual speed-time mechanical characteristics exceed the preset speed-time mechanical characteristics range, the mechanical characteristics monitoring device sends an adjustment signal to the fault warning terminal, so that the fault warning terminal sends an adjustment instruction to the operating work adjustment mechanism, and the operating work adjustment mechanism adjusts the pressure value of the energy storage spring until the actual speed-time mechanical characteristics fall within the preset speed-time mechanical characteristics range. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic structural diagram of a circuit breaker in a closed state in an embodiment of the present application.

[0028] FIG. 2 is a schematic structural diagram of the circuit breaker shown in FIG. 1 in an open state.

[0029] FIG. 3 is a schematic structural diagram of a spring operation work adjustment device for a circuit breaker in another embodiment.

[0030] FIG. 4 is an exploded view of the operating work adjustment device shown in FIG. 3 .

[0031] FIG5 is a flow chart of a method for adjusting the power of opening and closing operations in an embodiment of the present application.

[0032] Description of Figure Numbers

[0033] 100, main crank arm; 110, output shaft; 200, opening chain; 300, closing lock device; 400, spring operating mechanism; 410, energy storage spring; 420, operating work adjustment mechanism; 421, driver; 4211, output gear; 422, transmission worm; 4221, sub-gear; 423, turbine; 4231, first transmission section; 4231a, abutment end face; 4232, second transmission section; 430, pressure sensor; 440, positioning sleeve; 450, upper bearing; 460, lower bearing; 500, opening buffer; 600, first tensioning wheel; 700, second tensioning wheel. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0036] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0038] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0040] At present, in the phase-selective circuit breaker product industry, if the phase selection accuracy of the phase-selective circuit breaker is low, it is easy to cause excessive closing inrush current, resulting in equipment damage, protection action, DC shutdown and other events, which seriously threatens the safe and stable operation of the power grid system. Considering that the spring operating mechanism of the existing phase-selective circuit breaker is affected by factors such as energy storage medium fatigue, ambient temperature changes, the length of the action interval time, and changes in the product lubrication state, resulting in reduced opening and closing accuracy of the phase-selective circuit breaker, the present application provides a circuit breaker that helps to improve the opening and closing phase selection accuracy.

[0041] Specifically, please refer to Figures 1 and 2. Figure 1 shows a schematic diagram of the structure of the circuit breaker in an embodiment of the present application in a closed state. Figure 2 shows a schematic diagram of the structure of the circuit breaker shown in Figure 1 in an open state. The circuit breaker provided in an embodiment of the present application includes a main crank arm 100, an open chain 200, a closing lock device 300 and a spring operating mechanism 400. Among them, the main crank arm 100 is connected to the open chain 200, and the closing lock device 300 is unlockably connected to the main crank arm 100. The main crank arm 100 can be pulled by the open chain 200 to drive the output shaft 110 of the main crank arm 100 to rotate when it is unlocked by the closing lock device 300, so as to realize the operation of the circuit breaker from closing to opening. Furthermore, the spring operating mechanism 400 includes an energy storage spring 410, an operating work adjustment mechanism 420 and a pressure sensor 430. The energy storage spring 410 is connected to the opening chain 200 and is compressed under the traction of the opening chain 200. When the main crank arm 100 is unlocked by the closing lock device 300, the energy storage spring 410 can rebound and pull the opening chain 200 to drive the output shaft 110 to rotate to the theoretical opening position. The pressure sensor 430 is connected to the energy storage spring 410 and is used to monitor the pressure value of the energy storage spring 410 in real time. The operating work adjustment mechanism 420 is connected to the energy storage spring 410 and is used to adjust the pressure value of the energy storage spring 410.

[0042] Specifically, the output shaft 110 may be, but is not limited to, connected to a high-voltage switch product, so that the opening and closing operations of the high-voltage switch product can be realized.

[0043] When the above-mentioned circuit breaker is in use, the operating power adjustment mechanism 420 can timely adjust the compression amount of the energy storage spring 410 according to the pressure value of the energy storage spring 410 monitored in real time by the pressure sensor 430, so that the energy storage spring 410 can always be maintained within the preset pressure range, thereby meeting the tension requirement of the main crank arm 100 being pulled by the opening zipper to open the circuit, thereby improving the opening and closing phase selection accuracy of the circuit breaker.

[0044] More specifically, when the above-mentioned circuit breaker is in use, when the main crank arm 100 is locked by the closing lock device 300 and remains stationary, a preset pressure range can be set for the pressure sensor 430. The pressure sensor 430 monitors the actual pressure value of the energy storage spring 410 in real time and compares it with the above-mentioned preset pressure range. If the actual pressure value exceeds the preset pressure range, the operating work adjustment mechanism 420 can adjust the pressure value of the energy storage spring 410 in time, and the actual pressure value of the pressure sensor 430 is always maintained within the preset pressure range, that is, the tension on the opening chain 200 is always maintained within the preset pressure range, so that at the next opening operation, the rotational force requirement of the main crank arm 100 is met, thereby improving the accuracy of the opening and closing phase selection.

[0045] Preferably, the circuit breaker may, but is not limited to, further include a tripping buffer 500, which is connected to the main crank arm 100 and is used to buffer and limit the rotation of the main crank arm 100, so that during the tripping operation, it can be ensured that the circuit breaker is opened to the theoretical tripping position.

[0046] Optionally, the circuit breaker may, but is not limited to, further include a first tensioning wheel 600 and a second tensioning wheel 700 , wherein the first tensioning wheel 600 and the second tensioning wheel 700 are arranged at an interval and are in tension with the opening chain 200 .

[0047] Preferably, the first tensioning wheel 600 is arranged on the side close to the main crank arm 100, and is used to adjust the extension direction of the upstream section of the opening chain 200, so that the extension direction of the upstream section of the opening chain 200 and the movement direction of the connection point between the main crank arm 100 and the opening chain 200 are roughly in the same direction.

[0048] Specifically, as shown in FIG1 , when the main crank arm 100 is pulled by the opening chain 200 and rotates clockwise, the moving direction of the connection point between the main crank arm 100 and the opening chain 200 is approximately toward the lower left, and the extension direction of the upstream section of the opening chain 200 is also approximately toward the lower left under the restriction of the first tensioning wheel 600, which helps to improve the smoothness of the opening chain 200 pulling the main crank arm 100 to rotate. In addition, making the extension direction of the upstream section of the opening chain 200 and the moving direction of the connection point between the main crank arm 100 and the opening chain 200 approximately in the same direction helps to reduce the component force of the upstream section of the opening chain 200 in other directions, and then helps to improve the sensing accuracy of the pressure sensor 430.

[0049] The second tensioning wheel 700 is arranged on a side close to the spring operating mechanism 400, and is used to adjust the extension direction of the downstream section of the opening chain 200, so that the extension direction of the downstream section of the opening chain 200 is consistent with the compression direction of the energy storage spring 410. Specifically, as shown in FIG1, through the arrangement of the second tensioning wheel 700, the energy storage spring 410 can be adjusted in angle according to actual design requirements, and in each adjustment, the downstream section of the opening chain 200 can be adjusted to the extension direction consistent with the compression direction of the energy storage spring 410 under the restriction of the second tensioning wheel 700, thereby improving the flexibility of the structural arrangement.

[0050] In addition, the provision of the first tensioning wheel 600 and the second tensioning wheel 700 can keep the opening chain 200 in a tensioned state at all times. At the same time, in conjunction with the real-time pressure monitoring function of the pressure sensor 430 and the real-time adjustment function of the operating power adjustment mechanism 420, the opening chain 200 can obtain sufficient tensioning force to pull the main crank arm 100, and at the next opening operation, the rotational traction force requirement of the main crank arm 100 can be met, thereby improving the phase selection accuracy of opening and closing.

[0051] Optionally, the pressure sensor 430 can be, but is not limited to, implemented such that one end of the pressure sensor 430 is in contact with the energy storage spring 410 along the compression direction of the energy storage spring 410, and the other end is movably connected to the operating work adjustment mechanism 420. The operating work adjustment mechanism 420 can drive the pressure sensor 430 to move back and forth along the compression direction of the energy storage spring 410, thereby achieving pressure value adjustment of the energy storage spring 410, and the structure is simple and reliable.

[0052] Preferably, the pressure sensor 430 can be, but is not limited to, implemented in a sleeve shape with a central opening, and the opening chain 200 passes through the central opening of the pressure sensor 430 and is connected to the end of the energy storage spring 410 away from the pressure sensor 430, which helps to optimize the structural layout and improve the compactness of the structure.

[0053] Optionally, in combination with what is shown in FIG3 , the operating power adjustment mechanism 420 may include, but is not limited to, a driver 421, a transmission worm 422 and a turbine 423; the driver 421 is drivingly connected to the transmission worm 422, the transmission worm 422 is transmission-connected to the turbine 423, and the turbine 423 is transmission-connected to the pressure sensor 430 along the compression direction of the energy storage spring 410. Thus, driven by the driving force of the driver 421, the pressure sensor 430 can move back and forth under the threaded transmission of the turbine 423 to adjust the compression amount of the energy storage spring 410, and the adjustment structure is simple and reliable.

[0054] Optionally, the driver 421 may be, but is not limited to, implemented as an energy storage motor, which has an output gear 4211, which is in driving connection with the transmission worm 422, and the energy storage motor drives the output gear 4211 to rotate, thereby driving the transmission worm 422 to rotate. Optionally, the transmission worm 422 has a sub-gear 4221 which is coaxially arranged and meshes with the output gear 4211 for transmission, which helps to improve the transmission accuracy.

[0055] Preferably, as shown in FIG. 4 , the turbine 423 includes a first transmission section 4231 and a second transmission section 4232 along its rotation axis direction, the first transmission section 4231 is transmission-connected to the transmission worm 422 along its circumferential outer wall, the pressure sensor 430 is sleeved on the second transmission section 4232 and is threadedly connected to the inner wall of the second transmission section 4232, and when the first transmission section 4231 is driven by the worm to rotate forward and reverse, the second transmission section 4232 can drive the pressure sensor 430 to move back and forth along the compression direction of the energy storage spring 410. The above transmission process is precise and reliable, which improves the working reliability of the circuit breaker.

[0056] Preferably, the first transmission section 4231 and the second transmission section 4232 can be but are not limited to being implemented in a stage shape, and the first transmission section 4231 has an abutment end face 4231a, which can abut against the pressure sensor 430 along the compression direction of the energy storage spring 410 to limit the movement of the pressure sensor 430.

[0057] More preferably, the spring operating mechanism 400 also includes a positioning sleeve 440, and the pressure sensor 430 is embedded in the positioning sleeve 440, and the circumferential side surfaces of the pressure sensor 430 around the compression direction of the energy storage spring 410 are polyhedral, and each side surface is in contact with the inner wall of the positioning sleeve 440, thereby limiting the rotation of the pressure sensor 430 around the compression direction of the energy storage spring 410, and then the pressure sensor 430 can only move back and forth along the compression direction of the energy storage spring 410, thereby improving the movement stability of the pressure sensor 430 and improving the axial sensing accuracy of the pressure sensor 430.

[0058] Preferably, the spring operating mechanism 400 also includes an upper bearing 450 and a lower bearing 460, and the upper bearing 450 and the lower bearing 460 are respectively abutted against the two sides of the turbine 423 along the compression direction of the energy storage spring 410, and the upper bearing 450 and the lower bearing 460 are clamped in the positioning sleeve 440, so that the turbine 423 can be clamped in the positioning sleeve 440, and axial positioning is provided for the turbine 423 along the compression direction of the energy storage spring 410, thereby improving the rotation stability of the turbine 423.

[0059] More preferably, the upper bearing 450 and the lower bearing 460 abut against both sides of the first transmission section 4231 of the turbine 423 along the compression direction of the energy storage spring 410 . It can be understood that at this time, the abutting end face 4231a abutting against the pressure sensor 430 is configured as one side end face of the upper bearing 450 .

[0060] Optionally, the circuit breaker also includes a stroke angle output sensor, a mechanical characteristic monitoring device and a fault warning terminal. The stroke angle output sensor is connected to the energy storage spring 410 and is used to monitor the actual speed-time mechanical characteristics of the energy storage spring 410. The mechanical characteristic monitoring device is used to set a preset speed-time mechanical characteristic range of the energy storage spring 410. The mechanical characteristic monitoring device is connected to the fault warning terminal signal. When the actual speed-time mechanical characteristics exceed the preset speed-time mechanical characteristic range, the mechanical characteristic monitoring device sends an adjustment signal to the fault warning terminal, so that the fault warning terminal sends an adjustment instruction to the operating work adjustment mechanism 420. The operating work adjustment mechanism 420 adjusts the pressure value of the energy storage spring 410 until the actual speed-time mechanical characteristics fall within the preset speed-time mechanical characteristic range. In this way, the operating work compensation adjustment of the energy storage spring 410 is achieved, thereby improving the opening and closing accuracy of the circuit breaker.

[0061] Specifically, the speed-time mechanical characteristic reflects the travel condition of the main crank arm 100 during the rotation process. Further, in other embodiments, the monitoring process of the mechanical characteristic monitoring device can also be implemented, but not limited to, to determine whether the travel curve of the rotation speed-time relationship of the main crank arm 100 falls within the preset speed-time relationship threshold range. When the travel curve does not fall within the preset speed-time relationship threshold range, the mechanical characteristic monitoring device automatically calculates the operating work compensation value of the energy storage spring 410 to send an adjustment signal to the fault warning terminal, so that the fault warning terminal sends an adjustment instruction to the operating work adjustment mechanism 420, and the operating work adjustment mechanism 420 performs compensation adjustment on the energy storage spring 410 according to the above operating work compensation value.

[0062] On the other hand, in combination with FIG. 5 , the present application further provides a method for adjusting the opening and closing operation work, which is applied to the above-mentioned circuit breaker and includes the following steps:

[0063] S400, setting a preset pressure range for the pressure sensor 430;

[0064] S500, the pressure sensor 430 monitors the actual pressure value of the energy storage spring 410;

[0065] S600: If the actual pressure value exceeds the preset pressure range, the operating power adjustment mechanism 420 adjusts the pressure value of the energy storage spring 410 so that the actual pressure value of the pressure sensor 430 is always maintained within the preset pressure range.

[0066] In the above-mentioned method for adjusting the operating work of opening and closing switches, the operating work adjustment mechanism 420 can timely adjust the compression amount of the energy storage spring 410 according to the pressure value of the energy storage spring 410 monitored in real time by the pressure sensor 430, so that the energy storage spring 410 can always be maintained within the preset pressure range, thereby meeting the tension requirement of the main crank arm 100 being pulled by the opening zipper to open the switch, thereby improving the opening and closing phase selection accuracy of the circuit breaker.

[0067] In some embodiments, the method for adjusting the closing and opening operation work further includes the following steps before setting the preset pressure range for the pressure sensor 430:

[0068] S100, setting a preset speed-time mechanical characteristic range of the energy storage spring 410 to the mechanical characteristic monitoring device;

[0069] S200, the mechanical characteristic monitoring device monitors the actual speed-time mechanical characteristic of the energy storage spring 410;

[0070] S300. If the actual speed-time mechanical characteristic exceeds the preset speed-time mechanical characteristic range, the mechanical characteristic monitoring device sends an adjustment signal to the fault warning terminal, so that the fault warning terminal sends an adjustment instruction to the operating work adjustment mechanism 420, and the operating work adjustment mechanism 420 adjusts the pressure value of the energy storage spring 410 until the actual speed-time mechanical characteristic falls within the preset speed-time mechanical characteristic range.

[0071] Specifically, the circuit breaker of the present application can monitor the pressure change of the energy storage spring 410 through the mechanical characteristic monitoring device according to intelligent technologies such as the opening and closing spring pressure sensor monitoring and the stroke sensor monitoring, and then obtain the actual speed-time mechanical characteristic parameters of the energy storage spring 410, and compare and calculate with the preset speed-time mechanical characteristic range to obtain the dynamic pressure compensation value of the energy storage spring 410, and then perform the opening and closing pressure compensation of the energy storage spring 410 through the operating work adjustment mechanism 420, so as to ensure the stability of the opening and closing speed and time of the circuit breaker and improve the phase selection and closing accuracy of the phase selection circuit breaker.

[0072] It should be noted that, in this embodiment, the priority of steps S100-S300 is greater than the priority of steps S400-S600, and the operating power adjustment mechanism 420 prioritizes the actual speed-time rotation characteristics of the main crank arm 100 and makes corresponding adjustments, so that the actual speed-time rotation characteristics fall within the preset speed-time rotation characteristics range. The priority of steps S100-S300 is greater than the priority of steps S400-S600, so that the circuit breaker prioritizes the opening accuracy judgment according to the real-time speed-time mechanical characteristics of the energy storage spring 410 during the dynamic process of the opening operation, so that the monitoring is more accurate.

[0073] Specifically, steps S100-S300 enable the circuit breaker to meet the dynamic rotational force requirements of the main crank arm 100 during the opening operation, thereby improving the opening accuracy of the circuit breaker, helping to reduce the fluctuation effect of the load resistance change of the circuit breaker on the opening and closing time and speed, and improving the adjustment stability of the spring operating mechanism 400 on the main crank arm 100 under dynamic conditions, thereby improving the opening and closing phase selection accuracy of the circuit breaker; steps S400-S600 compare the actual pressure value of the energy storage spring 410 with the preset pressure range when the circuit breaker remains in the closed state, thereby meeting the rotational force requirements of the main crank arm 100 under static conditions, allowing the opening chain 200 to obtain sufficient tension to pull the main crank arm 100, and allowing the rotational traction force requirements of the main crank arm 100 to be met during the next opening operation, thereby improving the opening and closing phase selection accuracy.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0075] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A circuit breaker, characterized in that: The circuit breaker comprises: Main crutches; A breaking chain, the main crank arm is connected to the breaking chain; A closing lock device, wherein the closing lock device is unlockably connected to the main crank arm, and the main crank arm can be pulled by the opening chain to drive the output shaft of the main crank arm to rotate when the main crank arm is unlocked by the closing lock device; A spring operating mechanism, wherein the spring operating mechanism comprises an energy storage spring, an operating work adjustment mechanism and a pressure sensor, wherein the energy storage spring is connected to the opening chain and is compressed under the traction of the opening chain, and when the main crank arm is unlocked by the closing lock device, the energy storage spring can rebound and pull the opening chain to drive the output shaft to rotate to a theoretical opening position, the pressure sensor is connected to the energy storage spring and is used to monitor the pressure value of the energy storage spring in real time, and the operating work adjustment mechanism is connected to the energy storage spring and is used to adjust the pressure value of the energy storage spring.

2. The circuit breaker according to claim 1, characterized in that: The operating work adjustment mechanism includes a driver, a transmission worm and a turbine. The driver is drivingly connected to the transmission worm, the transmission worm is transmission-connected to the turbine, the turbine is transmission-connected to the pressure sensor along the compression direction of the energy storage spring, and the pressure sensor can move back and forth under the threaded drive of the turbine to adjust the compression amount of the energy storage spring.

3. The circuit breaker according to claim 2, characterized in that: The turbine includes a first transmission section and a second transmission section along its rotation axis direction. The first transmission section is connected to the transmission worm along its circumferential outer wall. The pressure sensor is sleeved on the second transmission section and threadedly connected to the inner wall of the second transmission section. When the first transmission section is driven by the worm to rotate forward and reverse, the second transmission section can drive the pressure sensor to move back and forth along the compression direction of the energy storage spring.

4. The circuit breaker according to claim 3, characterized in that: The first transmission section and the second transmission section are in a stage shape. The second transmission section has an abutting end surface. The abutting end surface can abut against the pressure sensor along the compression direction of the energy storage spring to limit the movement of the pressure sensor.

5. The circuit breaker according to claim 2, characterized in that: The spring operating mechanism also includes a positioning sleeve, the pressure sensor is embedded in the positioning sleeve, and the circumferential side surfaces of the pressure sensor around the compression direction of the energy storage spring are polyhedral, and each side surface is in contact with the inner wall of the positioning sleeve.

6. The circuit breaker according to claim 5, characterized in that: The spring operating mechanism further comprises an upper bearing and a lower bearing, wherein the upper bearing and the lower bearing are respectively abutted against two sides of the turbine along the compression direction of the energy storage spring, and the upper bearing and the lower bearing are clamped on the positioning sleeve.

7. The circuit breaker according to claim 1, characterized in that: The pressure sensor is sleeve-shaped and has a central opening. The opening chain passes through the central opening and is connected to one end of the energy storage spring away from the pressure sensor. One end of the pressure sensor abuts against the other end of the energy storage spring along the compression direction of the energy storage spring, and the other end is movably connected to the operating work adjustment mechanism.

8. The circuit breaker according to any one of claims 1 to 7, characterized in that: The circuit breaker also includes a stroke angle output sensor, a mechanical characteristic monitoring device and a fault warning terminal. The stroke angle output sensor is connected to the energy storage spring and is used to monitor the actual speed-time mechanical characteristic of the energy storage spring. The mechanical characteristic monitoring device is used to set a preset speed-time mechanical characteristic range of the energy storage spring. The mechanical characteristic monitoring device is connected to the fault warning terminal signal. When the actual speed-time mechanical characteristic exceeds the preset speed-time mechanical characteristic range, the mechanical characteristic monitoring device sends an adjustment signal to the fault warning terminal, so that the fault warning terminal sends an adjustment instruction to the operating work adjustment mechanism, and the operating work adjustment mechanism adjusts the pressure value of the energy storage spring until the actual speed-time mechanical characteristic falls within the preset speed-time mechanical characteristic range.

9. A method for adjusting the opening and closing operation work, applied to the circuit breaker according to any one of claims 1 to 8, characterized in that: The steps include: Setting a preset pressure range to a pressure sensor; The pressure sensor monitors the actual pressure value of the energy storage spring; If the actual pressure value exceeds the preset pressure range, the operating work adjustment mechanism adjusts the pressure value of the energy storage spring so that the actual pressure value of the pressure sensor is always maintained within the preset pressure range.

10. The method for adjusting the opening and closing operation work according to claim 9, characterized in that: The circuit breaker further includes a travel angle output sensor, a mechanical characteristic monitoring device and a fault warning terminal. The method for adjusting the opening and closing operation work also includes the following steps before setting a preset pressure range for the pressure sensor: Setting a preset speed-time mechanical characteristic range of the energy storage spring to the mechanical characteristic monitoring device; The mechanical characteristic monitoring device monitors the actual speed-time mechanical characteristic of the energy storage spring; If the actual speed-time mechanical characteristics exceed the preset speed-time mechanical characteristics range, the mechanical characteristics monitoring device sends an adjustment signal to the fault warning terminal, so that the fault warning terminal sends an adjustment instruction to the operating work adjustment mechanism, and the operating work adjustment mechanism adjusts the pressure value of the energy storage spring until the actual speed-time mechanical characteristics fall within the preset speed-time mechanical characteristics range.

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