Auxiliary operation device for insulation resistance megger

Abstract

Provided is an insulation resistance megger auxiliary operation device. Due to the fact that the stable rotating speed needs about 120 revolutions per minute, manual operation is tired due to the speed, stable operation cannot be kept for a long time, and meanwhile whether the rotating speed is stabilized at about 120 revolutions per minute or not cannot be known. The device comprises a speed regulating box (1), the speed regulating box is internally connected with a driving shaft (18) and a driven shaft (19) through bearings, a driving gear (17) is fixed on the driving shaft, a driven gear (20) is fixed on the driven shaft, a chuck (7) is fixed at the end part of the driven shaft, and a notch (12) is formed in the chuck; a rotary speed measuring sensor (4) is fixed on the speed regulating box and is over against the driven shaft; and supporting rods (6) are respectively fixed at two ends of the speed regulating box, penetrate through supporting lugs (9) at two sides of the insulation resistance megger (5) and then are fixed through fixing nuts (10). The auxiliary device is used for auxiliary operation of the insulation resistance megger.

Description

Technical Field

[0001] The utility model relates to an auxiliary operation device for an insulation resistance megger. Background Technique

[0002] An insulation resistance megger, also known as a megohmmeter, is mainly used to measure the insulation resistance of electrical equipment. After the circuit is connected during measurement, it is necessary to rotate the generator crank of the megger in a clockwise direction so that the voltage generated by the generator rotor can be used for measurement. The speed of the crank should be slow at first and then fast. When the speed reaches a certain value, the speed should be kept basically uniform. Generally, the speed of an ordinary megger is about 120 r / min. When the speed of the megger generator is basically stable, the pointer on the dial also stabilizes. At this time, the value indicated by the pointer is the measured insulation resistance value. During operation, the operation of the crank of the insulation resistance megger is carried out manually. Since a stable speed of about 120 revolutions per minute is required, such a speed will cause manual operation to be very tiring, unable to maintain stable operation for a long time, and at the same time unable to know whether the speed is stable at about 120 r / min. Content of the Utility Model

[0003] The purpose of the utility model is to provide an auxiliary operation device for an insulation resistance megger, which solves the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model is realized through the following technical solutions:

[0005] An auxiliary operation device for an insulation resistance megger, which comprises a speed regulation box. Inside the speed regulation box, the driving shaft and the driven shaft are connected by bearings. A driving gear is fixed on the driving shaft, and a driven gear is fixed on the driven shaft. A chuck is fixed at the end of the driven shaft, and the chuck has a notch;

[0006] A rotation speed measuring sensor is fixed on the speed regulation box, and the rotation speed measuring sensor faces the driven shaft;

[0007] Support rods are respectively fixed at both ends of the speed regulation box. The support rods pass through the support ears on both sides of the insulation resistance megger and are fixed by fixing nuts.

[0008] For the auxiliary operation device for an insulation resistance megger, two support feet are fixed at the bottom of the speed regulation box.

[0009] For the auxiliary operation device for an insulation resistance megger, the support feet include a fixed pipe and a screw rod fixed at the bottom of the speed regulation box. A support pad is fixed at the bottom of the screw rod, and the screw rod is threadedly connected with the fixed pipe.

[0010] For the auxiliary operation device for an insulation resistance megger, the end of the driving shaft is fixed to an operation handle. Beneficial Effects

[0011] 1. The utility model can reduce the speed when turning the megohmmeter through the auxiliary operating device. The tooth number ratio of the driving gear to the driven gear is 4:1. In this way, when the crank needs to rotate at a speed of 120 r / min, the manual operation of the operating handle only needs 30 r / min, greatly reducing the rotation speed and ensuring the stability of manual operation.

[0012] 2. The utility model is provided with a rotary speed measuring sensor, which can monitor the rotation speed of the driven shaft, so that the rotation speed of the driven shaft can be observed in real time, and the rotation speed of the operating handle can be adjusted in real time to make the rotation speed of the crank stable at about 120 r / min. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the front view of the utility model;

[0014] Figure 2 is the rear view of the utility model;

[0015] Figure 3 is the top view of the utility model;

[0016] Figure 4 is Figure 3 the sectional view taken along line A-A of

[0017] Figure 5 is Figure 1 the sectional view taken along line C-C of

[0018] Figure 6 is the front view of the utility model when in use;

[0019] Figure 7 is the side view of the utility model when in use;

[0020] Figure 8 is the top view of the utility model when in use;

[0021] Figure 9 is Figure 8 the sectional view taken along line B-B of

[0022] In the figure: 1. Speed regulation box; 2. Operating handle; 3. Control box; 4. Rotary speed measuring sensor; 5. Insulation resistance megohmmeter; 6. Support rod; 7. Chuck; 8. Crank; 9. Support ear; 10. Fixed nut; 11. Support foot; 12. Notch; 13. Fixed pipe; 14. Support pad; 15. Screw rod; 16. Threaded end; 17. Driving gear; 18. Driving shaft; 19. Driven shaft; 20. Driven gear. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0023] Please refer to Figures 1 to 5, An insulation resistance megohmmeter auxiliary operation device, which comprises a speed regulation box 1. Inside the speed regulation box, the driving shaft 18 and the driven shaft 19 are connected by bearings. A driving gear 17 is fixed on the driving shaft, and a driven gear 20 is fixed on the driven shaft. The driving gear meshes with the driven gear, and the tooth number ratio of the driving gear to the driven gear is 4:1. A chuck 7 is fixed at the end of the driven shaft, and the chuck has a notch 12;

[0024] A rotary speed measurement sensor 4 is fixed on the speed regulation box. The rotary speed measurement sensor faces the driven shaft. The rotary speed measurement sensor selects a photoelectric rotary optical axis speed measurement sensor. A reflective sticker 21 is pasted on the driven shaft. A control box is fixed on the top of the speed regulation box. The control box is a speed indicator, and the two are a supporting structure. And a power supply is set to provide electrical energy support for the speed indicator and the rotary speed measurement sensor. This circuit structure and speed measurement principle are both prior arts. This device only applies the photoelectric rotary optical axis speed measurement sensor and its supporting speed indicator here for speed measurement. The speed measurement can be displayed on the speed indicator in real time and can be observed;

[0025] Support rods 6 are respectively fixed at both ends of the speed regulation box. The ends of the support rods have threaded ends 16. The support rods pass through the support ears 9 on both sides of the insulation resistance megohmmeter 5 and are fixed by fixing nuts 10.

[0026] Two feet 11 are fixed at the bottom of the speed regulation box.

[0027] The feet include a fixed tube 13 fixed at the bottom of the speed regulation box and a screw rod 15. A support pad 14 is fixed at the bottom of the screw rod. The screw rod is threadedly connected with the fixed tube.

[0028] The end of the driving shaft is fixed to the operation handle 2.

[0029] Working principle: When in use, refer to the figure Figures 6 - 9 , During operation, turn the operation handle. At this time, the driving gear rotates. The driving gear meshes with the driven gear, causing the driven gear to rotate. The driven gear and the chuck are both fixed on the driven shaft. In this way, the chuck will drive the crank to rotate, realizing the rocking. During the rocking process, the rotary speed measurement sensor will measure the rotation speed of the driven shaft in real time, that is, the speed of the crank. Since the tooth number ratio of the driving gear to the driven gear is 4:1, when the crank needs a rotation speed of 120 r / min, manual operation of the operation handle only requires 30 r / min, greatly reducing the rotation speed and ensuring the stability of manual operation. At the same time, the rotation speed of the driven shaft is displayed on the speed indicator in real time. Observe whether the displayed rotation speed on it is about 120 r / min, so as to adjust the rotation speed of the operation handle in real time.

[0030] When initially fixing the device to the insulation resistance megger, first turn the handle end of the crank to the lowest position so that its notch passes through the handle end. Thread a fixing nut onto each support rod first. At the same time, the support rod will pass through the lug at the corresponding position of the insulation resistance megger, and then thread on another fixing nut. After the device is in place, turn the two fixing nuts to clamp the lug. At this time, adjust each support foot so that its support pad rests on the tabletop, and then the test operation can be carried out.

Claims

1. An insulating resistance megohmmeter auxiliary operation device, characterized in that: It consists of a speed regulating box. Inside the speed regulating box, the driving shaft and the driven shaft are connected by bearings. A driving gear is fixed on the driving shaft, and a driven gear is fixed on the driven shaft. A chuck is fixed at the end of the driven shaft, and the chuck has a notch. A rotational speed measuring sensor is fixed on the speed regulating box, and the rotational speed measuring sensor faces the driven shaft. Support rods are respectively fixed at both ends of the speed regulating box. The support rods pass through the support ears on both sides of the insulation resistance megger and are fixed by fixing nuts.

2. The auxiliary operating device for an insulation resistance megohmmeter according to claim 1, wherein: Two feet are fixed at the bottom of the speed regulating box.

3. An auxiliary operating device for an insulation resistance megger according to claim 2, characterized in that: The feet include a fixed pipe and a screw rod fixed at the bottom of the speed regulating box. A support pad is fixed at the bottom of the screw rod, and the screw rod is threadedly connected with the fixed pipe.

4. An auxiliary operation device for an insulation resistance megger according to claim 3, characterized in that: The end of the driving shaft is fixed to an operating handle.

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