A circuit breaker mechanical characteristic debugging device and a circuit breaker debugging method

Abstract

The embodiment of the application discloses a kind of circuit breaker mechanical characteristic debugging device and circuit breaker debugging method, the circuit breaker mechanical characteristic debugging device provided in the embodiment of the application includes circuit breaker body, electric jack, force sensor, control circuit, circuit breaker inner spring adjusting assembly and circuit breaker outer spring adjusting assembly, during debugging process to circuit breaker body, first loosen inner nut, after inner nut hangs loose, spring adjusting flange plate stops applying pressure to inner spring, then one end of electric jack is against spring flange plate, the other end is against external crossbeam, when electric jack elongates, the pressure that inner spring suffers increases, and the ejection speed of inner spring is calculated, when the ejection speed of inner spring meets use demand, inner nut is tightened again by circuit breaker inner spring adjusting assembly, to fix the position of spring flange plate, to fix the compression stroke of inner spring, and realize adjusting circuit breaker speed, so that the breaking speed of circuit breaker meets use demand.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of switch electrical equipment, in particular to a circuit breaker mechanical characteristic debugging device and a circuit breaker debugging method. BACKGROUND

[0002] The existing circuit breaker will be loose after a period of work under the long-term action of the spring, which will directly affect the circuit breaker speed, cause the fast cutting fault, the arc time extension and other problems, and further cause the circuit breaker component damage, and finally reduce the equipment service life.

[0003] Therefore, the circuit breaker opening and closing spring adjusting nut needs to be maintained regularly, and the adjusting nut is adjusted to the appropriate position by using a tool. However, the mechanical characteristics of the current circuit breaker are not suitable for common nut adjusting tools, the existing tool wrench is not convenient to twist the opening and closing spring adjusting nut inside the circuit breaker, and there is no special debugging device. At the same time, due to the large spring force, the adjusting nut inside the circuit breaker is hidden in the cylinder, and the existing adjusting nut tool is not concentric, and it is difficult to exert force. Therefore, during the operation and maintenance of the circuit breaker, the adjustment of the adjusting spring inside and outside the circuit breaker has always been a thorny problem. The traditional adjustment method often has many inconveniences, resulting in low adjustment work efficiency and difficult to guarantee the accuracy. SUMMARY

[0004] The present application aims to at least solve one of the problems in the prior art or related art.

[0005] To this end, the first aspect of the present application provides a circuit breaker mechanical characteristic debugging device.

[0006] The second aspect of the present application provides a circuit breaker debugging method.

[0007] Therefore, according to the first aspect of the present application, a circuit breaker mechanical characteristic debugging device is provided, which comprises: a circuit breaker body, the circuit breaker body comprises an inner spring, an outer spring, a spring flange, an adjusting screw rod, an inner nut and an outer nut;

[0008] The circuit breaker body realizes energy storage by compressing the inner spring, the spring flange is arranged at the compression end of the inner spring, the spring flange is provided with positioning holes on both sides, the adjusting screw rod passes through the positioning holes of the spring flange, the inner nut is threadedly connected to the adjusting screw rod and the inner nut is arranged on the side away from the inner spring;

[0009] The electric jack is arranged at one end of the spring flange, and the other end of the electric jack is arranged at the outer beam, and the compression amount of the inner spring is adjusted by adjusting the extension amount of the electric jack.

[0010] a force sensor disposed between the electric jack and an external beam for monitoring the pressure of the inner spring;

[0011] a control circuit electrically connected to the circuit breaker body, the force sensor and the electric jack, the control circuit monitoring the rebound speed of the inner spring by reading the data of the force sensor and the extension and contraction of the electric jack;

[0012] a circuit breaker inner spring adjusting assembly for adjusting the inner nut;

[0013] a circuit breaker outer spring adjusting assembly for adjusting the outer nut.

[0014] In an embodiment, the control circuit comprises:

[0015] a motor drive circuit for driving the lifting and lowering of the electric jack, the motor drive circuit driving the motor of the electric jack to rotate in a forward direction, and the electric jack is lifted, the motor drive circuit driving the motor of the electric jack to rotate in a reverse direction, and the electric jack is lowered;

[0016] a pressure conversion module for converting the pressure analog signal of the force sensor into a digital signal;

[0017] a remote weighing data acquisition circuit for reading the pressure value collected in the pressure conversion module in real time.

[0018] In an embodiment, the control circuit further comprises:

[0019] a single-chip microcomputer electrically connected to the remote weighing data acquisition circuit, the single-chip microcomputer reading the spring compression stroke, the pressure value and calculating the rebound speed of the inner spring through the remote weighing data acquisition circuit, the single-chip microcomputer being electrically connected to the motor drive circuit, the single-chip microcomputer sending a pulse width modulation signal to the motor drive circuit, and the motor drive circuit controlling the motor of the circuit breaker jack according to the pulse width modulation signal output by the single-chip microcomputer.

[0020] In an embodiment, the control circuit further comprises:

[0021] a liquid crystal display electrically connected to the single-chip microcomputer.

[0022] In an embodiment, the control circuit further comprises:

[0023] a power failure saving circuit for saving the compression stroke down pressure size of the inner spring and the disconnection speed parameter;

[0024] The single-chip microcomputer is electrically connected to the power failure saving circuit and transmits the parameters to be saved to the power failure saving circuit through integrated circuit bus communication.

[0025] In a feasible implementation, the control circuit further comprises:

[0026] A power supply circuit electrically connected to the remote weighing data acquisition circuit, the motor driving circuit, the liquid crystal display, the electric jack, the force sensor, the pressure conversion module, and the power failure saving circuit, for converting 220V power supply voltage into direct current voltage required by each part of the circuit.

[0027] In a feasible implementation, the inner spring adjusting assembly of the circuit breaker comprises:

[0028] An adjusting wrench head with a one-sided open hexagonal groove that fits the outer contour of the inner nut;

[0029] A torque wrench connected to one end of the adjusting wrench head.

[0030] In a feasible implementation, the inner spring adjusting assembly of the circuit breaker further comprises:

[0031] A supporting plate provided on the adjusting wrench head, the supporting plate having a coaxial circular groove with the hexagonal groove of the adjusting wrench head, the diameter of the circular groove being greater than the diameter of the adjusting screw and less than the diameter of the outer circle of the inner nut, and the supporting plate having an opening on the same side as the adjusting wrench head, the opening having the same width as the diameter of the circular groove.

[0032] In a feasible implementation, the outer spring adjusting assembly of the circuit breaker comprises:

[0033] A sleeve having a torque opening at one end, the inner groove of the torque opening fitting the outer nut, and the other end of the sleeve being a first connecting end;

[0034] A first extension rod having one end detachably connected to the first connecting end of the sleeve;

[0035] A second extension rod having one end detachably connected to the other end of the first extension rod;

[0036] An electric torque wrench having a second connecting end, the electric torque wrench being used to drive the sleeve, and the electric torque wrench being electrically connected to a torque meter.

[0037] The sleeve, the first extension rod, the second extension rod, and the electric torque wrench are coaxially arranged.

[0038] According to a second aspect of the embodiment of the present application, a circuit breaker debugging method is provided, which is applied to the circuit breaker mechanical characteristic debugging device described above, and comprises the following steps:

[0039] According to the required breaking speed of the circuit breaker body, the required compression stroke of the inner spring is determined.

[0040] According to the required breaking speed of the circuit breaker body, the rebound speed of the inner spring is determined.

[0041] The inner nut is loosened by the circuit breaker inner spring adjusting assembly.

[0042] The inner spring is compressed by the electric jack.

[0043] The compression stroke and the pressure of the inner spring are read by the force sensor and the control circuit.

[0044] According to the compression stroke and the pressure of the inner spring, the rebound speed of the inner spring is calculated based on the relationship between the compression stroke, the pressure, and the rebound speed of the inner spring.

[0045] The compression amount of the inner spring by the electric jack is adjusted until the rebound speed of the inner spring meets the use requirement.

[0046] The inner nut is tightened by the circuit breaker inner spring adjusting assembly.

[0047] Compared with the prior art, the present application has at least the following beneficial effects: Since the breaking speed of the circuit breaker generally needs milliseconds or even tens of milliseconds, the speed is very fast, and in the working process of the circuit breaker, the compression range of the inner spring has a crucial influence on the reaction time. The force sensor can accurately measure the force applied by the electric jack to the inner spring in real time. Based on the measurement data, the compression amount of the inner spring can be finely adjusted. This accurate adjustment method can realize accurate adjustment of the reaction time of the circuit breaker, improve the response performance of the circuit breaker body under different working conditions, further enhance the reliability and stability of the circuit breaker in the power system, and better protect the safe operation of the power system. The technical solution fundamentally solves the problem of circuit breaker debugging, and through innovative design and technical means, an effective solution to the above-mentioned problem of adjusting the spring of the circuit breaker is developed. BRIEF DESCRIPTION OF DRAWINGS

[0048] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to be limiting in

[0049] Figure 1 Schematic circuit diagram of the control circuit of an embodiment provided by the present application;

[0050] Figure 2 Structural block diagram of the circuit breaker body of an embodiment provided by the present application;

[0051] Figure 3 Structural exploded view of the in-circuit breaker spring adjustment assembly of an embodiment provided by the present application;

[0052] Figure 4 Axonometric structural view of the in-circuit breaker spring adjustment assembly of an embodiment provided by the present application;

[0053] Figure 5 Front view block diagram of the in-circuit breaker spring adjustment assembly of an embodiment provided by the present application;

[0054] Figure 6 Schematic adjustment view of the in-circuit breaker spring adjustment assembly of an embodiment provided by the present application;

[0055] Figure 7 Structural exploded view of the out-circuit breaker spring adjustment assembly of an embodiment provided by the present application.

[0056] Wherein, Figures 1-7 The correspondence between the reference signs and the component names in the accompanying drawings is as follows:

[0057] 100, circuit breaker body; 200, electric jack; 300, force sensor; 400, control circuit; 500, in-circuit breaker spring adjustment assembly; 600, out-circuit breaker spring adjustment assembly;

[0058] 110, in-spring; 120, spring flange; 130, adjusting screw; 140, in-nut;

[0059] 410, motor driving circuit; 420, pressure conversion module; 430, remote weighing data acquisition circuit; 440, single-chip microcomputer; 450, liquid crystal display screen; 460, power failure saving circuit;

[0060] 510, adjustment wrench head; 520, torque wrench; 530, supporting plate;

[0061] 610. Socket; 620. First extension rod; 630. Second extension rod; 640. Electric torque wrench. Detailed Implementation

[0062] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0063] like Figures 1-7 As shown, a circuit breaker mechanical characteristic adjustment device is proposed according to a first aspect of the embodiments of this application, comprising: a circuit breaker body 100, the circuit breaker body 100 including an inner spring 110, an outer spring, a spring flange 120, an adjusting screw 130, an inner nut 140, and an outer nut; the circuit breaker body 100 stores energy by compressing the inner spring 110, the spring flange 120 is disposed at the compression end of the inner spring 110, positioning holes are respectively provided on both sides of the spring flange 120, the adjusting screw 130 passes through the positioning holes of the spring flange 120, the inner nut 140 is threadedly connected to the adjusting screw 130 and is disposed on the side away from the inner spring 110; an electric jack 200, one end of the electric jack 200 abutting against the spring flange 120, the electric jack 200... The other end of the top jack 200 abuts against the outer crossbeam, and the compression of the inner spring 110 is adjusted by adjusting the extension and retraction of the electric jack 200; a force sensor 300 is disposed between the electric jack 200 and the outer crossbeam to monitor the pressure of the inner spring 110; a control circuit 400 is electrically connected to the circuit breaker body 100, the force sensor 300, and the electric jack 200, and the control circuit 400 monitors the rebound speed of the inner spring 110 by reading the data from the force sensor 300 and the extension and retraction of the electric jack 200; an inner spring adjustment assembly 500 is used to adjust the inner nut 140; and an outer spring adjustment assembly 600 is used to adjust the outer nut.

[0064] The circuit breaker mechanical property debugging device provided by the embodiment of the application comprises a circuit breaker body 100, an electric jack 200, a force sensor 300, a control circuit 400, a circuit breaker inner spring adjusting assembly 500 and a circuit breaker outer spring adjusting assembly 600. In the process of debugging the circuit breaker body 100, first, the inner nut 140 is loosened, and after the inner nut 140 is loosened, the spring adjusting flange plate stops applying pressure to the inner spring 110. Then, one end of the electric jack 200 abuts against the spring flange plate 120, and the other end of the electric jack 200 abuts against the outer cross beam. When the electric jack 200 is elongated, the pressure borne by the inner spring 110 increases, and the compression stroke of the inner spring 110 is greater. According to the pressure borne by the inner spring 110 and the compression stroke, the ejection speed of the inner spring 110 is calculated. When the ejection speed of the inner spring 110 meets the use requirement, the inner nut 140 is tightened again through the circuit breaker inner spring adjusting assembly 500, so that the position of the spring flange plate 120 is fixed, the compression stroke of the inner spring 110 is fixed, and the speed of the circuit breaker is adjusted, so that the breaking speed of the circuit breaker meets the use requirement.

[0065] Since the breaking speed of the circuit breaker generally needs to be in milliseconds or even tens of milliseconds, the speed is very fast. In the working process of the circuit breaker, the compression range of the inner spring 110 has a crucial influence on the reaction time. The force sensor 300 can be used to accurately measure the force applied by the electric jack 200 to the inner spring 110 in real time. Based on the measurement data, the compression range of the inner spring 110 can be finely adjusted. This accurate adjustment method can realize accurate adjustment of the reaction time of the circuit breaker, improve the response performance of the circuit breaker body 100 under different working conditions, further enhance the reliability and stability of the circuit breaker in the power system, and better protect the safe operation of the power system. The technical solution fundamentally solves the problem of circuit breaker debugging. Through innovative design and technical means, an effective solution to the above-mentioned problem of adjusting the spring of the circuit breaker is developed.

[0066] As shown in Figures 1-7 The control circuit 400 comprises a motor driving circuit 410, a pressure conversion module 420 and a remote weighing data acquisition circuit 430. The motor driving circuit 410 is used to drive the lifting and lowering of the electric jack 200. When the motor driving circuit drives the motor of the electric jack 200 to rotate forward, the electric jack 200 is lifted. When the motor driving circuit drives the motor of the electric jack 200 to rotate reversely, the electric jack 200 is lowered. The pressure conversion module 420 is used to convert the pressure analog signal of the force sensor 300 into a digital signal. The remote weighing data acquisition circuit 430 is used to read the pressure value collected in the pressure conversion module 420 in real time.

[0067] In the technical solution, the control circuit 400 mainly uses the characteristics of the spring to control the breaking speed of the circuit breaker body 100. Since the breaking speed of the circuit breaker is generally required to be several milliseconds to tens of milliseconds, the speed needs to be very fast, and the control circuit 400 is used to control the rebound speed of the control inner spring 110.

[0068] The motor driving circuit 410 is used to drive the lifting and lowering of the electric jack 200, and the electric jack 200 is used to control the inner spring 110. The greater the compression stroke of the electric jack 200, the greater the elasticity of the inner spring 110, and the faster the breaking speed of the circuit breaker.

[0069] The pressure conversion module 420 is powered by AC 220V, and is electrically connected to the single-chip microcomputer 440 and the force sensor 300.

[0070] The pressure conversion module 420 is connected to the single-chip microcomputer 440 through the remote weighing data acquisition circuit 430 (also referred to as the RS485 circuit).

[0071] The outer spring pressure of the circuit breaker body 100 can be adjusted through the circuit breaker outer spring adjustment assembly 600.

[0072] As shown in Figures 1-7 The control circuit 400 further comprises a single-chip microcomputer 440, which is electrically connected to the remote weighing data acquisition circuit 430. The single-chip microcomputer 440 reads the spring compression stroke and pressure size calculated by the pressure conversion module 420 through the remote weighing data acquisition circuit 430, and calculates the rebound speed of the inner spring 110. The single-chip microcomputer 440 is electrically connected to the motor driving circuit 410, and is used to send a pulse width modulation signal to the motor driving circuit 410. The motor driving circuit 410 controls the motor of the circuit breaker jack according to the pulse width modulation signal output by the single-chip microcomputer 440.

[0073] In the technical solution, the single-chip microcomputer 440 serves as a control center, and is responsible for data reading of the pressure conversion module 420, algorithm calculation, logic control, motor control, man-machine interactive control, etc. in the circuit breaker mechanical characteristic debugging device. The single-chip microcomputer 440 reads the spring pressure size calculated by the pressure conversion module 420 through RS485, and then calculates the spring rebound speed according to the spring compression stroke and the pressure size by using the relationship among the spring compression stroke, the pressure size and the rebound speed, so as to indirectly obtain the breaking speed of the circuit breaker. The single-chip microcomputer 440 outputs two pulse width modulation signals (hereinafter referred to as PWM signals) to the motor driving circuit 410, so as to indirectly control the electric jack 200. When the PWM signal is given in the forward direction and no PWM signal is given in the reverse direction, the motor of the electric jack 200 rotates in the forward direction, and vice versa. If the speed of the motor needs to be controlled, the duty cycle of the PWM signal is used to achieve the control. The higher the duty cycle, the faster the motor rotates.

[0074] As shown in Figures 1-7 , the control circuit 400 further comprises a liquid crystal display screen 450, which is electrically connected to the single-chip microcomputer 440.

[0075] In the technical solution, the control circuit 400 further comprises the liquid crystal display screen 450. In the embodiment, the display screen uses the HMI serial display screen of TAO ZHI CHI, and the liquid crystal display screen 450 is self-driven. The single-chip microcomputer 440 is used for serial communication. First, the control display interface is designed in the matched host computer design software, and then the interface is downloaded to the liquid crystal display screen 450. Finally, the single-chip microcomputer 440 can control the liquid crystal display screen 450 through serial communication, including parameter display and button control.

[0076] As shown in Figures 1-7 , the control circuit 400 further comprises a power failure saving circuit 460, which is used for saving the compression stroke pressure size and the breaking speed parameters of the internal spring 110. The single-chip microcomputer 440 is electrically connected to the power failure saving circuit 460, and transmits the parameters to be saved to the power failure saving circuit 460 through integrated circuit bus communication.

[0077] In the technical solution, the main function of the power failure saving circuit 460 is to save necessary parameters, such as the force size of a spring compression stroke and the breaking speed. The single-chip microcomputer 440 sends the parameters to be saved to the power failure saving circuit 460 through integrated circuit bus communication (also referred to as I2C communication). After receiving the command and the parameters, the power failure saving circuit 460 performs corresponding data saving operation. Each time the device is started, the single-chip microcomputer 440 will read the parameters saved before the last power failure during initialization.

[0078] As shown in Figures 1-7As shown, the control circuit 400 further comprises a power supply circuit electrically connected to the remote weighing data acquisition circuit 430, the motor driving circuit 410, the liquid crystal display 450, the electric jack 200, the force sensor 300, the pressure conversion module 420, and the power failure storage circuit 460, and the power supply circuit is used to convert 220V power supply voltage into DC voltage required by each part of the circuit.

[0079] In the embodiment, the device uses AC 220V power supply, and the power supply circuit mainly converts AC 220V into DC voltage required by each part of the circuit, for example, the electric jack 200 requires DC 12V, the RS485 circuit, the single-chip microcomputer 440, and the power failure storage circuit 460 require DC 3.3V, and the liquid crystal display 450 requires DC 5V.

[0080] As shown in the figure, Figures 1-7 The breaker inner spring adjusting assembly 500 comprises an adjusting wrench head 510, which is provided with a one-side open hexagonal groove body matching the outer contour of the inner nut 140; and a torque wrench 520, one end of which is connected to the adjusting wrench head 510.

[0081] In the technical scheme, for the breaker inner spring adjusting assembly 500, the adjusting wrench head 510 is one-side open and matches the inner nut 140, and in the embodiment, the outer contour of the inner nut 140 is hexagonal, and the adjusting wrench head 510 can accurately clamp the nut.

[0082] In the technical scheme, the cooperation of the breaker inner spring adjusting assembly 500 and the electric jack 200 can realize more accurate adjustment. The electric jack 200 can provide stable thrust according to actual needs, and in combination with the feedback of the force sensor 300 (mentioned in the iterative upgrading direction), the accurate control of the spring compression amount can be realized, further improving the accuracy of spring adjustment and ensuring the stability of the breaker performance.

[0083] As shown in the figure, Figures 1-7 The breaker inner spring adjusting assembly 500 further comprises a supporting plate 530, which is arranged on the adjusting wrench head 510, and the supporting plate 530 is coaxially provided with a circular groove body in the hexagonal groove body of the adjusting wrench head 510, the diameter of the circular groove body is greater than the diameter of the adjusting screw 130 and less than the diameter of the circumscribed circle of the inner nut 140, and the supporting plate 530 is provided with an opening on the same side of the adjusting wrench head 510, and the opening has the same width as the diameter of the circular groove body.

[0084] In the technical scheme, the design of the supporting plate 530 supporting the inner nut 140 and the adjusting screw 130 ensures the stability of the nut and the screw during the adjustment process.

[0085] As shown in Figures 1-7 The circuit breaker outer spring adjusting assembly 600 includes a sleeve 610, one end of the sleeve 610 is provided with a torque port, the inner groove of the torque port is matched with the outer nut, and the other end of the sleeve 610 is a first connecting end; a first extension rod 620, one end of the first extension rod 620 is detachably connected to the first connecting end of the sleeve 610; a second extension rod 630, one end of the second extension rod 630 is detachably connected to the other end of the first extension rod 610; an electric torque wrench 640, one end of the electric torque wrench 640 is a second connecting end, the electric torque wrench 640 is used to drive the sleeve 610, and the electric torque wrench 640 is electrically connected to a torque instrument; and the sleeve 610, the first extension rod 620, the second extension rod 630 and the electric torque wrench 640 are coaxially arranged.

[0086] In the technical scheme, for the circuit breaker outer spring adjusting assembly 600, the specially designed sleeve 610 and the first extension rod 620 and the second extension rod 630 are matched with the electric torque wrench 520, so that the operation of the outer spring adjusting nut outer nut can be more conveniently performed. The operator no longer needs to search for a suitable force point, and can directly use the tool to quickly adjust, thereby shortening the adjustment time and improving the work efficiency compared with the existing tool.

[0087] Meanwhile, the structural design of the external sleeve 610 wrench ensures that the force transmission is more stable and uniform during the adjustment process, reduces the adjustment error caused by tool shaking or different centers, makes the nut adjustment more accurate, and further ensures the accurate control of the mechanical characteristics such as the circuit breaker opening and closing speed.

[0088] Meanwhile, the electric torque wrench 640 is electrically connected to a torque instrument, when the torque of the electric torque wrench 640 reaches the set torque value of the torque instrument, the electric torque wrench 640 stops running, and through the setting, the pressure of the outer spring can be controlled.

[0089] As shown in Figures 1-7 According to a second aspect of the present application, a circuit breaker debugging method is provided, which is applied to the circuit breaker mechanical characteristic debugging device in any one of the above aspects, and includes the following steps:

[0090] Determining the required breaking speed of the circuit breaker body 100 according to the use requirement;

[0091] Determining the rebound speed of the inner spring 110 according to the required breaking speed of the circuit breaker body 100;

[0092] Loosening the inner nut 140 through the circuit breaker inner spring adjusting assembly 500;

[0093] The inner spring 110 is compressed by the electric jack 200;

[0094] The compression stroke and pressure of the inner spring 110 are read by the force sensor 300 and the control circuit 400;

[0095] The rebound speed of the inner spring 110 is calculated according to the compression stroke and pressure of the inner spring 110 through the relationship between the compression stroke, pressure and rebound speed of the inner spring 110;

[0096] The compression amount of the inner spring 110 by the electric jack 200 is adjusted until the rebound speed of the inner spring 110 meets the use requirement;

[0097] The inner nut 140 is screwed by the breaker inner spring adjusting assembly 500.

[0098] In the present application, the terms "first", "second", "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, "connecting" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0099] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0100] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0101] The above merely describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A circuit breaker mechanical characteristic tuning device, characterized by, The circuit breaker body comprises an inner spring, an outer spring, a spring flange, an adjusting screw, an inner nut and an outer nut. The circuit breaker body stores energy by compressing the inner spring, the spring flange is arranged at the compression end of the inner spring, both sides of the spring flange are respectively provided with positioning holes, the adjusting screw passes through the positioning holes of the spring flange, the inner nut is threadedly connected to the adjusting screw and is arranged on the side away from the inner spring. The electric jack is abutted at one end to the spring flange and at the other end to an external cross beam, the compression amount of the inner spring is adjusted by adjusting the extension and retraction amount of the electric jack. A force sensor is arranged between the electric jack and the external cross beam for monitoring the pressure of the inner spring. A control circuit is electrically connected to the circuit breaker body, the force sensor and the electric jack, the control circuit monitors the rebound speed of the inner spring by reading the data of the force sensor and the extension and retraction amount of the electric jack. A circuit breaker inner spring adjusting assembly is arranged for adjusting the inner nut. A circuit breaker outer spring adjusting assembly is arranged for adjusting the outer nut. The control circuit comprises: A motor driving circuit is arranged for driving the electric jack to rise and fall, the motor driving circuit drives the motor of the electric jack to rotate forward, and the electric jack rises, the motor driving circuit drives the motor of the electric jack to rotate reversely, and the electric jack falls. A pressure conversion module is arranged for converting the pressure analog signal of the force sensor into a digital signal. A remote weighing data acquisition circuit is arranged for reading the pressure value collected in the pressure conversion module in real time. The circuit breaker inner spring adjusting assembly comprises: An adjusting wrench head is provided with a one-side-opened hexagonal groove, and the hexagonal groove is matched with the outer contour of the inner nut. A torque wrench is connected at one end to the adjusting wrench head. The circuit breaker inner spring adjusting assembly further comprises: A supporting plate is arranged on the adjusting wrench head, a circular groove is coaxially arranged in the adjusting wrench head hexagonal groove, the diameter of the circular groove is greater than the diameter of the adjusting screw and less than the diameter of the outer tangent circle of the inner nut, and an opening is arranged on the same side of the adjusting wrench head and the supporting plate, and the width of the opening is the same as the diameter of the circular groove. The circuit breaker outer spring adjusting assembly comprises: A sleeve is provided at one end with a torque opening, the inner groove of the torque opening is matched with the outer nut, and the other end of the sleeve is a first connecting end. A first extension rod is detachably connected at one end to the first connecting end of the sleeve. A second extension rod is detachably connected at one end to the other end of the first extension rod. ​ The electric torque wrench has a second connecting end at one end thereof, is used to drive the sleeve, and is electrically connected to a torque instrument. The sleeve, the first extension rod, the second extension rod, and the electric torque wrench are coaxially arranged.

2. The circuit breaker mechanical characteristic tuning device of claim 1, wherein, The control circuit further comprises: The single-chip microcomputer is electrically connected to the remote weighing data acquisition circuit, reads the spring compression stroke and the pressure size calculated by the pressure conversion module, and calculates the spring rebound speed, is electrically connected to the motor driving circuit, and is used to send a pulse width modulation signal to the motor driving circuit.

3. The circuit breaker mechanical characteristic tuning device of claim 2, wherein, The control circuit further comprises: The liquid crystal display screen is electrically connected to the single-chip microcomputer.

4. The circuit breaker mechanical characteristic tuning device of claim 3, wherein, The control circuit further comprises: The power failure saving circuit is used to save the spring compression stroke and the pressure size and the opening speed parameters. The single-chip microcomputer is electrically connected to the power failure saving circuit and transmits the parameters to be saved to the power failure saving circuit through an integrated circuit bus communication.

5. The circuit breaker mechanical characteristic tuning device of claim 4, wherein, The control circuit further comprises: The power supply circuit is electrically connected to the remote weighing data acquisition circuit, the motor driving circuit, the liquid crystal display screen, the electric jack, the force sensor, the pressure conversion module, and the power failure saving circuit, and is used to convert a 220V power supply voltage into a direct current voltage required by each part of the circuit.

6. A circuit breaker commissioning method, characterized by, The application is applied to the circuit breaker mechanical property debugging device in any one of claims 1-5, and comprises: According to the use requirement, the opening speed required by the circuit breaker body is determined; According to the opening speed required by the circuit breaker body, the spring rebound speed is determined; The inner nut is loosened through the circuit breaker inner spring adjusting assembly; The inner spring is compressed through the electric jack; The compression stroke and the pressure size of the inner spring are read through the force sensor and the control circuit; According to the compression stroke and the pressure size of the inner spring, the spring rebound speed is calculated through the relationship between the compression stroke, the pressure size, and the rebound speed of the inner spring; The compression amount of the inner spring by the electric jack is adjusted until the spring rebound speed meets the use requirement; The inner nut is tightened through the circuit breaker inner spring adjusting assembly.

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