CN213243774U

CN213243774U - Low-voltage motor rotor-drawing auxiliary device

Info

Publication number: CN213243774U
Application number: CN202021999979.5U
Authority: CN
Inventors: 高现伟; 迟洪祥; 秦日兵; 赵承胜
Original assignee: China Power Hua Yuan Nuclear Power Engineering & Technology Co ltd
Current assignee: China Power Hua Yuan Nuclear Power Engineering & Technology Co ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-05-18
Anticipated expiration: 2030-09-14

Abstract

The utility model relates to a low-voltage motor takes out rotor auxiliary device, including base, lifting support, backup pad and gyro wheel, lifting support's lower extreme is connected at the base upside, the downside in the backup pad is connected to lifting support's upper end, the gyro wheel sets up two, all connects the upside in the backup pad, blocks fixed rotor when two gyro wheels are used for taking out the rotor. Compared with the prior art, the utility model discloses device simple structure, steadiness are strong, and convenient to use has fast, accurate rotor of taking out, avoids the manpower hand to lift personnel that lead to be injured, equipment damage, reduces advantages such as the individual radiation dose that receives in nuclear area.

Description

Low-voltage motor rotor-drawing auxiliary device

Technical Field

The utility model belongs to the technical field of the maintenance of nuclear power plant, especially, relate to a low-voltage motor takes out rotor auxiliary device.

Background

At present, in a nuclear power station, motors are widely used, particularly low-voltage motors are numerous, and numerous low-voltage motors bring numerous maintenance works. Although the low-voltage motor is not as heavy as the high-voltage motor, the weight is generally between 150KG and 300KG, the weight of a rotor of the motor is generally between 50KG and 150KG, the weight is too troublesome to use lifting and hoisting, resources are too wasted by using lifting and hoisting, if only using manpower to pump the rotor, two persons work, and the heavy weight easily causes injury to the personnel; although the weight is uniformly shared by two or more persons, the low-voltage motor rotor pumping operation is difficult to operate in a traditional mode, but is easily damaged and low in efficiency.

Chinese patent CN211405794U discloses a special tool for drawing a rotor of a variable-diameter motor, which is used for solving the problem that the same tool in the prior art can only draw the core of the rotor with the same shaft diameter, but can not draw the core of the rotors with various shaft diameters.

Chinese patent CN211321155U discloses a portable tool for on-site rotor extraction for nuclear power plant motors. Two X-shaped bearing diagonal are all fixed with two shape of division portal screw thread, the top screw thread of two shape of division portals is fixed with same crossbeam, be equipped with the pulley between two shape of division portals, the pulley is hung there is the U-shaped mounting bracket, U-shaped mounting bracket movable sleeve is established on the crossbeam, equal screw thread is fixed with the fixed plate on the both sides inner wall of U-shaped mounting bracket, one side that one fixed plate in two fixed plates is close to another fixed plate is rotated and is installed two wheels that roll, the top slidable mounting of wheel and crossbeam rolls, one side that another fixed plate is close to a fixed plate is rotated and is installed two first gears, two first gears all with the top slidable mounting of crossbeam, be equipped with same second gear of installing in another fixed plate one side of rotating between two first.

Chinese patent CN210867447U discloses a large-scale motor rotor drawing device, which comprises a base, wherein the bottom end of the base is rotatably provided with a roller, a jack is fixed above the base, the top end of the jack is fixed with a support column, and the support column is provided with an expansion assembly for expanding in a key groove; the expansion assembly comprises a circular ring connected to the support column in a sliding manner, a support rod hinged to the circular ring, a support bulge fixed to the support column and an elastic piece fixedly connected between the support column and the support rod, the support rod is symmetrically arranged on two sides of the circular ring, and the support bulge is located above the circular ring; the support column is provided with a moving part for controlling the circular ring to lift. The utility model discloses have can expand tightly in the keyway on the rotor, the effect of stability when promoting to remove.

The devices disclosed in the above patents are also applicable to the rotor for low-voltage motors, but they are either too bulky, occupy a large space, or are complex in construction.

SUMMERY OF THE UTILITY MODEL

To the actual problem of taking out the rotor difficulty among the low-voltage motor dismouting process, the utility model provides a rotor auxiliary device is taken out to self-control low-voltage motor, the utility model discloses a make things convenient for manpower dismouting rotor except being used for low-voltage motor to take out the rotor, also can be applied to nuclear power scene and other places.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a low-voltage motor takes out rotor auxiliary device, including base, lifting support, backup pad and gyro wheel, lifting support's lower extreme is connected at the base upside, the downside in the backup pad is connected to lifting support's upper end, the gyro wheel sets up two, all connects the upside in the backup pad, blocks fixed rotor when two gyro wheels are used for taking out the rotor.

The utility model discloses an in the embodiment, the universal wheel is installed to the base downside, the quantity of universal wheel is four, is located base downside four corners department. The universal wheel can be a common high-quality universal wheel in the market, and good structural performance and bearing performance of the device are ensured.

In one embodiment of the present invention, the lower side of the support plate is connected to the upper end of the lifting bracket through a rotation pin.

In one embodiment of the present invention, the upper side of the base is connected to the lower end of the lifting bracket through a rotation pin.

The utility model discloses an in an embodiment, lifting support includes two sections and cuts the fork crane, cuts through two pivots between the fork crane and connects for two sections, is provided with the screw rod between two pivots, the screw rod simultaneously with two pivot threaded connection, realize the adjustment of distance between two pivots through rotating the screw rod, and then realize the lift of backup pad to the height of adjustment backup pad and gyro wheel plays the effect of fixed stay simultaneously. The two sections of scissor type lifting frames can rotate 180 degrees through a structure connected through two rotating shafts.

The screw rod simultaneously with two pivot threaded connection, realize the adjustment of distance between two pivots through rotating the screw rod for conventional technological means, only need can realize through setting up the screw thread direction on the screw rod.

Still provide another kind of lifting support's structure, cut the fork crane including two sections, cut two sections and connect through two pivots between the fork crane, all seted up the through-hole in two pivots, the screw rod passes the through-hole of two pivots, the screw rod both ends use the nut to adjust, through the horizontal distance of adjusting two nuts, the adjustment of distance between two present pivots, and then make lifting support contract and open, and then realize the lift of backup pad.

In another embodiment of the present invention, the lifting support can be an electric lifting support.

In an embodiment of the present invention, the roller is a cylindrical structure, and is connected to the two supporting seats through a middle rotating shaft, and the supporting seats are connected to the upper side of the supporting plate.

The utility model discloses an in the embodiment, two parallel guide rails are seted up to the backup pad upside, supporting seat sliding connection realizes the regulation of distance between two gyro wheels through the slip of supporting seat on the guide rail to adapt to different rotor thicknesses.

The utility model discloses an in the embodiment, offer on the supporting seat and be used for fixing the through-hole on the guide rail with the supporting seat, after the distance adjustment is accomplished between two gyro wheels, utilize the screw to pass the through-hole and realize fixing between supporting seat and the guide rail to two firm gyro wheels.

The utility model discloses in, two parallel intervals of gyro wheel set up.

In one embodiment of the present invention, the roller is a metal wheel. The base and the supporting plate are made of stainless steel plates, and the lifting support is made of stainless steel materials with stable structures. The device is integrally made of stainless steel and has excellent mechanical properties.

When the device is used, correctly pack false shaft into rotor one end, place this device false shaft one end, two this devices are placed to the rotor other end, adjust the height of this device backup pad as required, after the device jack-up rotor gently, notice the gap between stator winding and rotor, prevent to damage stator winding, carry out the rotor axial and take out, adopt the manpower to promote the utility model discloses a device, after the false shaft of equivalent length is exposed to one end, is supported by another device, then accomplishes after two devices support and takes out the rotor, adjusts the height again and transfers, accomplishes and takes out the whole processes of rotor.

Compared with the prior art, the utility model discloses device simple structure, steadiness are strong, and convenient to use has fast, accurate rotor of taking out, avoids the manpower hand to lift personnel that lead to be injured, equipment damage, reduces advantages such as the individual radiation dose that receives in nuclear area. Specifically, the following advantages are provided:

1) the operation is convenient, and the operation is easy to master:

the special device has a clear and simple structure, and related personnel such as motor maintenance and the like can master the use method through simple introduction.

2) The personal injury risk is low, and safety factor is high:

compared with the manual method of using a steel pipe as a dummy shaft to lift the rotor and then take out the rotor, the device is safer to use, and the three-point supporting mode is adopted, so that two points are guaranteed to support the rotor at every moment, the supporting points are firm and reliable, and the device is supported by a large-area base and can bear heavier pressure. Therefore, the working process is safer when the device is used reasonably, and the injury risk of personnel is greatly reduced.

3) The dip coating surface of the gap between the winding stator and the rotor can be effectively protected:

when the rotor is drawn out by manpower, because a plurality of people are needed for matching, and the body and the rotor are only connected through hands and a dummy shaft, but not rigidly connected, the horizontal drawing out in the true sense is difficult to achieve. The stator and rotor gap is very narrow. This presents the possibility of damaging the painted surface at the gap when the rotor is manually extracted. And use the utility model discloses a level in the true sense can be accomplished and take out, has effectively protected the varnished cloth face.

4) The application range is wider:

the device can be manufactured according to the size requirements of the on-site manhole cover plate and the bolt hole, has wide applicability, can be used for dismounting the manhole cover and can also be used for adjusting the parallelism and concentricity of a large-diameter valve and a pipeline flange.

Drawings

Fig. 1 is a schematic structural diagram of a rotor extraction auxiliary device of a low-voltage motor in embodiment 1.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Examples

Referring to fig. 1, the embodiment provides a low-voltage motor takes out rotor auxiliary device, including base 1, lifting support 2, backup pad 3 and gyro wheel 4, the lower extreme of lifting support 2 is connected at base 1 upside, the downside at backup pad 3 is connected to the upper end of lifting support 2, gyro wheel 4 sets up two, all connects the upside at backup pad 3, blocks fixed rotor when two gyro wheels 4 are used for taking out the rotor.

In this embodiment, universal wheels 11 are installed to base 1 downside, the quantity of universal wheels 11 is four, is located base 1 downside four corners department. The universal wheel can be a common high-quality universal wheel in the market, and good structural performance and bearing performance of the device are ensured.

In this embodiment, the lower side of the supporting plate 3 is connected with the upper end of the lifting bracket 2 through a rotating pin. The upper side of the base 1 is connected with the lower end of the lifting bracket 2 through a rotating pin.

In this embodiment, lifting support 2 includes that two sections are cut the fork crane, cuts through two pivot connections between the fork crane for two sections, is provided with screw rod 21 between two pivots, screw rod 21 simultaneously with two pivot threaded connection, realize the adjustment of distance between two pivots through rotating screw rod 21, and then realize the lift of backup pad 3 to the height of adjustment backup pad 3 and gyro wheel 4 plays the effect of fixed stay simultaneously. The two sections of scissor type lifting frames can rotate 180 degrees through a structure connected through two rotating shafts. The screw rod 21 is connected with two pivot screw threads simultaneously, realizes the adjustment of distance between two pivots for conventional technical means through rotating screw rod 21, only needs can realize through setting up the screw thread direction on the screw rod 21.

In this embodiment, still provide another kind of lifting support 2's structure, including two sections scissors fork cranes, cut two sections and connect through two pivots between the fork crane, all seted up the through-hole in two pivots, screw rod 21 passes the through-hole of two pivots, screw rod 21 both ends use the nut to adjust, through the horizontal distance of adjusting two nuts, the adjustment of distance between two present pivots, and then make lifting support contract and open, and then realize the lift of backup pad 3.

In this embodiment, the roller 4 is a cylindrical structure and is connected to two supporting seats 41 through a middle rotating shaft, and the supporting seats 41 are connected to the upper side of the supporting plate 3.

In this embodiment, two parallel guide rails may be further disposed on the upper side of the supporting plate 3, the supporting seat 41 is slidably connected to the guide rails, and the distance between the two rollers 4 is adjusted by sliding the supporting seat 41 on the guide rails to adapt to the thickness of different rotors. The support base 41 is provided with a through hole for fixing the support base 41 on the guide rail, and after the distance between the two rollers 4 is adjusted, the screws penetrate through the through hole to fix the support base 41 and the guide rail, so that the two rollers are stabilized.

In this embodiment, the two rollers 4 are disposed in parallel at intervals. The roller 4 is a metal wheel. The base 1 and the supporting plate 3 are made of stainless steel plates, and the lifting support 2 is made of stainless steel materials with stable structures. The device is integrally made of stainless steel and has excellent mechanical properties.

The device of this embodiment is verified, and is respond well in the maintenance process of regional low-voltage motor of Shandong Haiyang nuclear power station 1# machine and BOP.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. The utility model provides a low-voltage motor takes out rotor auxiliary device, its characterized in that, includes base (1), lifting support (2), backup pad (3) and gyro wheel (4), the lower extreme of lifting support (2) is connected at base (1) upside, the downside in backup pad (3) is connected to the upper end of lifting support (2), gyro wheel (4) set up two, all connect the upside in backup pad (3), block fixed rotor when two gyro wheels (4) are used for taking out the rotor.

2. A low-voltage motor rotor extraction auxiliary device according to claim 1, characterized in that universal wheels (11) are mounted on the lower side of the base (1).

3. Low-voltage motor rotor extraction auxiliary device according to claim 1, characterized in that the underside of the support plate (3) is connected to the upper end of the lifting bracket (2) by means of a pivot pin.

4. The low-voltage motor rotor pumping auxiliary device as claimed in claim 1, wherein the upper side of the base (1) is connected with the lower end of the lifting bracket (2) through a rotating pin.

5. The low-voltage motor rotor extraction auxiliary device is characterized in that the lifting support (2) comprises two sections of scissor type lifting frames, the two sections of scissor type lifting frames are connected through two rotating shafts, a screw rod (21) is arranged between the two rotating shafts, the screw rod (21) is in threaded connection with the two rotating shafts at the same time, and the adjustment of the distance between the two rotating shafts is realized by rotating the screw rod (21), so that the lifting of the support plate (3) is realized.

6. Low-voltage motor rotor extraction auxiliary device according to claim 1, characterized in that the lifting bracket (2) is selected from a motorized lifting bracket.

7. An auxiliary device for rotor extraction of a low-voltage motor as claimed in claim 1, characterized in that said roller (4) is of cylindrical configuration and is connected to two support blocks (41) by means of an intermediate rotating shaft, said support blocks (41) being connected to the upper side of the support plate (3).

8. The low-voltage motor rotor pulling auxiliary device is characterized in that two parallel guide rails are arranged on the upper side of the support plate (3), the support seat (41) is connected to the guide rails in a sliding mode, and the distance between the two rollers (4) is adjusted through the sliding of the support seat (41) on the guide rails so as to adapt to different rotor thicknesses.

9. The auxiliary device for pulling out the rotor of the low-voltage motor according to claim 8, wherein the supporting seat (41) is provided with a through hole for fixing the supporting seat (41) on the guide rail, and when the distance between the two rollers (4) is adjusted, the fixing between the supporting seat (41) and the guide rail is realized by using a screw to pass through the through hole so as to stabilize the two rollers.

10. A low-voltage motor rotor extraction auxiliary device according to claim 1, characterized in that the two rollers (4) are arranged in parallel and spaced apart.