CN204405036U - A kind of high precision switch over travel measurement mechanism - Google Patents

Abstract

A high-precision switch stroke measurement device, including a stroke sensor, a level calibrator and a calibrator support plate, the stroke sensor is vertically fixed on one side of the switch under test, and its measuring pull rod is connected to the switch under test through a horizontal measuring connecting rod. The moving contact is connected, the calibrator supporting plate is fixed on the side wall of the stroke sensor and is perpendicular to the axis of the stroke sensor, and the horizontal calibrating instrument is placed on the calibrating instrument supporting plate. The utility model combines the stroke sensor and the level calibrator together, and uses the level calibrator to adjust the axial direction of the stroke sensor during the measurement process so that it is kept perpendicular to the horizontal plane, thus ensuring the measurement accuracy of the switch stroke and effectively preventing Misjudgments by surveyors about the health of circuit breakers.

Description

A high-precision switch stroke measuring device

technical field

The utility model relates to a device capable of accurately measuring the switch stroke of a circuit breaker, which belongs to the technical field of switches.

Background technique

The switching speed is an important data to judge the operating status of the circuit breaker. If the speed is too high, it will cause mechanical damage to the switch, and if the speed is too small, it will cause arcing. At present, the switching speed is calculated by using the switching travel and switching time measured by the external sensor, and the switching travel is generally measured by using the vertical travel sensor shown in Figure 1, and the travel sensor is fixed vertically during the measurement , the measuring rod is connected with the circuit breaker under test through the measuring connecting rod. The disadvantage of this kind of measuring device is that the axis of the sensor cannot be guaranteed to be perpendicular to the horizontal plane during measurement. If the axis of the sensor is not perpendicular to the horizontal plane, the measurement structure will be larger than the actual value, and the switching speed calculated from this will also increase. It may cause the measurement personnel to misjudgment the operating status of the circuit breaker, make the circuit breaker that does not meet the standard operate in the power grid, and pose a threat to the safe operation of the power grid. In addition, during the switching operation, the measuring connecting rod 3 will inevitably swing, causing the sensor measuring rod 2 to swing accordingly, seriously affecting the service life of the travel sensor.

Utility model content

The purpose of the utility model is to provide a high-precision switch stroke measuring device for the drawbacks of the prior art, so that the measuring personnel can accurately judge the operating condition of the circuit breaker.

Problem described in the utility model is realized with following technical scheme:

A high-precision switch stroke measurement device, which includes a stroke sensor, a level calibrator and a calibrator support plate, the stroke sensor is vertically fixed on one side of the switch to be tested, and its measuring pull rod is connected to the tested switch through a horizontal measuring connecting rod. The moving contact of the measuring switch is connected, the calibrator supporting plate is fixed on the side wall of the stroke sensor and is perpendicular to the axis of the stroke sensor, and the horizontal calibrating instrument is placed on the calibrating instrument supporting plate.

The above-mentioned high-precision switch stroke measurement device also includes a guide cylinder and a guide column in the composition. The guide cylinder is fixed directly above the stroke sensor and is coaxial with the measuring rod of the stroke sensor. The guide column is located in the guide cylinder and is aligned with the guide column. The cylinder is slidingly fitted, and its lower end is fixedly connected with the measuring connecting rod.

In the above-mentioned high-precision switch stroke measuring device, the bottom surface of the level calibrator is inlaid with a magnet corresponding to the upper plane of the calibrator supporting plate.

The utility model combines the stroke sensor and the level calibrator together, and uses the level calibrator to adjust the axial direction of the stroke sensor during the measurement process so that it is kept perpendicular to the horizontal plane, thus ensuring the measurement accuracy of the switch stroke and effectively preventing Misjudgments by surveyors about the health of circuit breakers. The guide cylinder and the guide column can effectively prevent the sensor measuring rod from swinging and prolong the service life of the sensor.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is a measurement schematic diagram of a traditional switch travel measuring device;

Fig. 2 is a structural representation of the utility model;

Fig. 3 is the state of the utility model after the switch action.

The labels in the figure are: 1. stroke sensor, 2. measuring rod, 3. measuring connecting rod, 4. level calibrator, 5. calibrator support plate, 6. guide cylinder, 7. guide column, a. switch Measure the position of the connecting rod before the action, b. Measure the position of the connecting rod after the switch operates.

Detailed ways

Referring to Fig. 2, the utility model is mainly made of stroke sensor 1, level calibrator 4, calibrator supporting plate 5.

Production process:

1. Weld a calibrator support plate 5 on the side wall of the stroke sensor 1, and the calibrator support plate 5 is perpendicular to the axis of the stroke sensor 1.

2. Place the level calibrator 4 on the calibrator support plate 5 and fix it firmly.

Functions and features of the level calibrator:

(1) Adjust the inclination angle of the horizontal X-axis and Y-axis to about 0° to ensure the accuracy of the test data.

(2) High precision, resolution up to 0.02°.

(3) Rechargeable, run for 40 hours after charging.

(4) Easy to install, the bottom is magnetic, and can be adsorbed on the calibrator support plate 5.

(5) The alarm value can be set, and the alarm can be issued when the angle meets the test requirements.

apply effects

Adjusting the installation position of the stroke sensor through the level calibrator can make the stroke sensor perpendicular to the horizontal plane, thereby improving the accuracy of the switch characteristic test and providing an important guarantee for the stable operation of the equipment. It provides a reliable basis for condition-based maintenance and ensures the stable operation of the power grid.

Claims (3)

1. A high-precision switch stroke measurement device, characterized in that the device includes a stroke sensor (1), a level calibrator (4) and a calibrator support plate (5), and the stroke sensor (1) is vertically It is fixed on one side of the switch under test, and its measuring rod (2) is connected with the moving contact of the switch under test through the horizontal measuring connecting rod (3), and the calibrator support plate (5) is fixed on the stroke sensor (1) On the side wall and perpendicular to the axis of the stroke sensor (1), the horizontal calibrator (4) is placed on the calibrator support plate (5). 2. A high-precision switch stroke measurement device according to claim 1, characterized in that the composition also includes a guide cylinder (6) and a guide column (7), and the guide cylinder (6) is fixed on the stroke sensor ( 1) and coaxial with the measuring rod (2) of the travel sensor (1), the guide column (7) is located in the guide cylinder (6) and slides with the guide cylinder (6), and its lower end is connected with the measuring connection The rod (3) is fixedly connected. 3. A high-precision switch stroke measuring device according to claim 1 or 2, characterized in that the bottom surface of the level calibrator (4) is inlaid with the upper plane of the calibrator support plate (5) corresponding magnets.