Force measuring device for opening and closing coil

Abstract

The utility model discloses a force measuring device for an opening-closing coil. The utility model aims to solve the problems that the prior art cannot be suitable for mechanical force measurement of opening and closing coils of various specifications and dimensions, and the mechanical force measurement precision is not high. According to the technical scheme, the device comprises a base, an opening and closing coil fixer and a force transducer, the opening and closing coil fixer and the force transducer are mounted on the base, and the device is characterized in that the opening and closing coil fixer adopts cross-shaped flat tongs of which the clamping position can be adjusted and changed front and back and left and right, and the force transducer is mounted on a mounting frame fixed on the base; a long nail groove extending in the vertical direction is formed in the side face, facing the cross-shaped flat tongs, of the installation frame, and a screw on the rear side of the force transducer penetrates through the long nail groove and then is matched with a nut located on the inner side of the installation frame for locking and fixing.

Description

Technical Field

[0001] The utility model relates to a component performance testing device for a high-voltage circuit breaker of a switch cabinet, in particular to a device for measuring the force of opening and closing coils. Background Technique

[0002] With the expansion of power demand, people's requirements for the reliability of working devices in the power system are also getting higher and higher. As an important electrical component in the power system, the high-voltage circuit breaker of the switch cabinet plays a role in controlling and protecting the circuit, and its operation reliability directly affects the power supply reliability. The opening and closing coils are the core components of the electric opening and closing part in the high-voltage circuit breaker. In the high-voltage circuit breaker, by using the electromagnetic effect after the coil is energized, electrical energy is converted into mechanical energy, so that the moving iron core of the opening and closing coil impacts the operating mechanism of the circuit breaker to achieve the purpose of driving the circuit breaker to open and close. Due to factors such as the shape and size, wire diameter, and power of the opening and closing coils, the impact forces output by the opening and closing coils at different strokes are also different. During the use of the opening and closing coils, the service life may also be affected by the environment, resulting in a decline in the performance of the opening and closing coils, and causing the operating mechanism of the circuit breaker to fail to be driven. Therefore, it is crucial to detect the impact force of the opening and closing coils, which can verify whether the selection matches the operating mechanism of the high-voltage circuit breaker, and can also verify whether the failure of the high-voltage circuit breaker to trip is caused by the decline in the performance of the coils.

[0003] A portable device for measuring the mechanical force of opening and closing coils disclosed in Chinese Patent No. CN208443976U has a structure including a base. A power supply fixing part, a force measuring device, and an opening and closing coil fixing part are provided on the base. The force measuring device is fixedly connected to the base, and the opening and closing coil fixing part is fixedly connected to the base; the surface area of the opening and closing coil fixing part is adjustable, and the opening and closing coil is fixed on the opening and closing coil fixing part. The detection end of the force measuring device is located in the moving direction of the push rod in the opening and closing coil; the power supply fixing part is used for fixedly placing the power supply for supplying power to the opening and closing coil, and the power supply fixing part is located on the side of the opening and closing coil fixing part away from the force measuring device; there are two power supply fixing parts, one of the power supply fixing parts is located on the side of the opening and closing coil fixing part away from the force measuring device; the other power supply fixing part is located on the side of the force measuring device away from the opening and closing coil fixing part. The disadvantages of this solution are: first, the clamping position and clamping width of the fixing part of the opening and closing coil cannot be adjusted, so it can only be used to measure the mechanical force of one specification and size of the opening and closing coil, and cannot be used to measure the mechanical force of various specifications and sizes of the opening and closing coils, with poor versatility; second, the height of the force measuring device cannot be adjusted, so it is difficult for the moving iron core of the opening and closing coil to align with the impact center of the force measuring device, affecting the accuracy of the mechanical force measurement. Summary of the Invention

[0004] In order to overcome the problems existing in the prior art, such as being unable to be applicable to closing and opening coils of various specifications and sizes for mechanical force measurement, with poor versatility, and it is difficult for the moving iron core of the closing and opening coil to align with the impact center of the force measuring device, which affects the accuracy of mechanical force measurement, the purpose of the present utility model is to provide an improved closing and opening coil force measuring device that can overcome the defects of the prior art.

[0005] The technical solution adopted by the present utility model to solve its technical problems is: a closing and opening coil force measuring device, including a base and a closing and opening coil holder and a force measuring sensor installed on the base, characterized in that: the closing and opening coil holder adopts a cross flat-jaw vice with adjustable clamping positions in the front-back, left-right directions, the force measuring sensor is installed on a mounting bracket fixed to the base, a long nail groove extending in the up-down direction is provided on the side of the mounting bracket facing the cross flat-jaw vice, and the force measuring sensor is locked and fixed by a screw at its rear passing through the long nail groove and cooperating with a nut inside the mounting bracket.

[0006] The cross flat-jaw vice in the above technical solution may be composed of a vice base fixed to the base, a hand-operated front-back adjustment driving mechanism arranged on the vice base, a front-back sliding seat slidably matched with the vice base and drivingly cooperating with the hand-operated front-back adjustment driving mechanism, a hand-operated left-right adjustment driving mechanism arranged on the front-back sliding seat, a left-right sliding seat slidably matched with the front-back sliding seat and drivingly cooperating with the hand-operated left-right adjustment driving mechanism, and a clamping mechanism fixed to the left-right sliding seat. The hand-operated front-back adjustment driving mechanism and the hand-operated left-right adjustment driving mechanism may both adopt a screw-nut mechanism. The clamping mechanism is composed of a clamping seat, a fixed clamping block fixedly arranged on the clamping seat, a movable clamping block slidably matched with the clamping seat, and a control screw for manually controlling the movement of the movable clamping block. The clamping mouth of the cross flat-jaw vice is formed by the fixed clamping block and the movable clamping block.

[0007] A sensor data converter may be provided on the base below the force measuring sensor in the above technical solution.

[0008] The closing and opening coil force measuring device in the above technical solution may include a closing and opening coil control circuit and a sensor data display circuit provided outside the base. The control output end of the closing and opening coil control circuit is connected to the power supply end of the tested closing and opening coil, and the signal output end of the force measuring sensor is connected to the signal input end of the sensor data display circuit through the sensor data converter.

[0009] The beneficial effects of the present utility model are as follows: Since the closing and opening coil fixer adopts a cross flat-jaw pliers with a clamping position that can be adjusted in the front-back, left-right directions, closing and opening coils of different specifications and sizes can be clamped on the jaws of the cross flat-jaw pliers. Moreover, the front end of the moving iron core of the closing and opening coil can be adjusted to the position of the perpendicular bisector of the impact surface of the force measuring sensor, and the distance between the front end of the moving iron core of the closing and opening coil and the impact surface of the force measuring sensor can be adjusted to fully meet the specific requirements of different specifications of closing and opening coils. Therefore, this force measuring device can ideally be applied to mechanical force measurement of closing and opening coils of various different specifications and sizes. Since the force measuring sensor is installed on a mounting bracket fixed to the base, and a long nail groove extending in the up-down direction is provided on the side surface of the mounting bracket facing the cross flat-jaw pliers, the force measuring sensor is locked and fixed by a screw at its rear passing through the long nail groove and cooperating with a nut inside the mounting bracket. Therefore, when the front end of the moving iron core of the closing and opening coil has been adjusted to the position of the perpendicular bisector of the impact surface of the force measuring sensor, the height position of the force measuring sensor can be conveniently adjusted, which can ensure that the moving iron cores of all closing and opening coils are aligned with the center position of the impact surface of the force measuring sensor, effectively improving the accuracy of mechanical force measurement.

[0010] The following further describes the present utility model in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of an embodiment of the present utility model.

[0012] Figure 2 is Figure 1 a top view schematic diagram of

[0013] In the figure: 1, base; 2, force measuring sensor; 3, cross flat-jaw pliers; 4, mounting bracket; 5, side surface; 6, long nail groove; 7, screw; 8, nut; 9, pliers base; 10, hand-operated front-back adjustment drive mechanism; 11, front-back sliding seat; 12, hand-operated left-right adjustment drive mechanism; 13, left-right sliding seat; 14, clamping mechanism; 15, clamping seat; 16, fixed jaw block; 17, movable jaw block; 18, control screw; 19, sensor data converter; 20, closing and opening coil; 21, front end of moving iron core. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] Refer to Figures 1 - 2, this make-and-break coil force measuring device includes a base 1 and a make-and-break coil holder and a force measuring sensor 2 installed on the base 1. Its characteristics are: the make-and-break coil holder uses a cross flat-jaw pliers 3 with adjustable clamping positions in the front-back, left-right directions. The force measuring sensor 2 is installed on a mounting bracket 4 fixed to the base 1. On the side 5 of the mounting bracket 4 facing the cross flat-jaw pliers 3, there is a long nail slot 6 extending in the up-down direction. The force measuring sensor 3 is locked and fixed by a screw 7 at its rear passing through the long nail slot 6 and cooperating with a nut 8 inside the mounting bracket 4.

[0015] In addition, the cross flat-jaw pliers 3 consists of a pliers base 9 fixed to the base 1, a hand-operated front-back adjustment drive mechanism 10 arranged on the pliers base 9, a front-back sliding seat 11 slidably fitted on the pliers base 9 and drivingly cooperating with the hand-operated front-back adjustment drive mechanism 10, a hand-operated left-right adjustment drive mechanism 12 arranged on the front-back sliding seat 11, a left-right sliding seat 13 slidably fitted on the front-back sliding seat 11 and drivingly cooperating with the hand-operated left-right adjustment drive mechanism 12, and a clamping mechanism 14 fixed to the left-right sliding seat 13. The hand-operated front-back adjustment drive mechanism 10 and the hand-operated left-right adjustment drive mechanism 13 both adopt screw-nut mechanisms. The clamping mechanism 14 consists of a clamp seat 15, a fixed clamping block 16 fixedly arranged on the clamp seat 14, a movable clamping block 17 slidably fitted on the clamp seat 15, and a control screw 18 for manually controlling the movement of the movable clamping block 17. The clamping mouth of the cross flat-jaw pliers is formed by the fixed clamping block 16 and the movable clamping block 17.

[0016] Below the force measuring sensor 2 on the base 1, there is a sensor data converter 19.

[0017] The make-and-break coil force measuring device further includes a make-and-break coil control circuit (not shown) and a sensor data display circuit (not shown) arranged outside the base 1. The control output end of the make-and-break coil control circuit is connected to the power supply end of the tested make-and-break coil. The signal output end of the force measuring sensor 2 is connected to the signal input end of the sensor data display circuit through the sensor data converter 19.

[0018] During measurement, rotate the control screw 18 to place a make-and-break coil 20 as Figure 2is clamped on the jaws between the fixed jaw block 16 and the movable jaw block 17; rotate the hand-operated left-right adjustment drive mechanism 12 to align the front end 21 of the moving iron core of the closing and opening coil 20 with the perpendicular bisector position of the impact surface of the force measuring sensor 2; rotate the hand-operated front-back adjustment drive mechanism 10 to adjust the distance between the front end 21 of the moving iron core of the closing and opening coil 20 and the impact surface of the force measuring sensor 2 to a set distance; then loosen the nut 8, move the force measuring sensor 2 up and down to make the midpoint of the impact surface of the force measuring sensor 2 align with the front end 21 of the moving iron core of the closing and opening coil 20, and then lock the nut 8, so that the mechanical force measurement of the closing and opening coil 20 can be carried out; the mechanical force measurement controls the front end 21 of the moving iron core of the closing and opening coil 20 to impact the impact surface of the force measuring sensor 2 through an externally provided closing and opening coil control circuit, and reads the mechanical force data of the impact through an externally provided sensor data display circuit.

Claims

1. A closing coil force measuring device, comprising a base and a closing coil holder and a force measuring sensor mounted on the base, characterized in that: The closing and opening coil holder adopts a cross flat-nose pliers whose clamping position can be adjusted forward, backward, left and right. The force sensor is installed on a mounting frame fixed to the base. The mounting frame is provided with a long nail groove extending in the up and down directions on the side facing the cross flat-nose pliers. The force sensor is locked and fixed by the screw on its rear side passing through the long nail groove and cooperating with the nut on the inner side of the mounting frame.

2. The closing and opening coil force measuring device according to claim 1 is characterized in that: The cross flat-nose pliers are composed of a pliers seat fixed on the base, a hand-cranked front and rear adjustment drive mechanism arranged on the pliers seat, a front and rear slide that slides on the pliers seat and is driven by the hand-cranked front and rear adjustment drive mechanism, a hand-cranked left and right adjustment drive mechanism arranged on the front and rear slide, a left and right slide that slides on the front and rear slide and is driven by the hand-cranked left and right adjustment drive mechanism, and a clamping mechanism fixed on the left and right slide. The hand-cranked front and rear adjustment drive mechanism and the hand-cranked left and right adjustment drive mechanism both adopt a screw-nut mechanism. The clamping mechanism is composed of a clamping seat and a fixed clamping block fixed on the clamping seat, a movable clamping block that slides on the clamping seat, and a control screw that manually controls the movement of the movable clamping block. The fixed clamping block and the movable clamping block constitute the clamping jaws of the cross flat-nose pliers.

3. The closing and opening coil force measuring device according to claim 1 or 2, characterized in that: A sensor data converter is provided on the base below the force sensor.

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