CN218123243U

CN218123243U - Mechanical driving mechanism of dry type vacuum on-load tap-changer

Info

Publication number: CN218123243U
Application number: CN202222116347.5U
Authority: CN
Inventors: 王兆鑫; 王广帅; 王玲玲
Original assignee: Shandong Yijin Electric Co ltd
Current assignee: Shandong Yijin Electric Co ltd
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2022-12-23
Anticipated expiration: 2032-08-11

Abstract

The utility model discloses a mechanical driving mechanism of a dry vacuum on-load tap-changer, which comprises a base and a balance wheel, wherein the bottom of the base is provided with a driving device, the driving device is connected with a rocker and a rocker in a transmission way, an energy storage mechanism is arranged between the rocker and the balance wheel, a limiter is arranged between the rocker and the balance wheel, a buffer block is arranged on a switching output shaft, a damper is fixedly arranged on the base, and the damper corresponds to the buffer block in position; the energy storage mechanism consisting of the first spring and the second spring can gradually store energy under the power input of the driving device, and the balance wheel can instantly, stably and accurately switch the contacts when the limiter is separated from the balance wheel; through the arrangement of the buffer block and the damper, the balance wheel can buffer the process from quick rotation to stop, and the service life is prolonged; the signal device and the digital arrangement on the signal device can display the gear of the tap changer, and the control and management are convenient.

Description

Mechanical driving mechanism of dry type vacuum on-load tap-changer

Technical Field

The utility model relates to an on-load tap-changer technical field, specific theory especially relates to a dry-type vacuum has on-load tap-changer's mechanical drive mechanism.

Background

The on-load tap-changer is a switching device for providing constant voltage for a transformer when the load changes, and the basic principle is to realize the switching among taps in the winding of the transformer under the condition of ensuring that the load current is not interrupted, thereby changing the number of turns of the winding, namely the voltage ratio of the transformer and finally realizing the purpose of voltage regulation; the vacuum on-load tap changer mainly realizes arc extinguishing by a vacuum tube, so that burning corrosion of a contact in the vacuum tube can be reduced to the minimum. Two vacuum tubes connected in series with a vacuum on-load tap-changer in the prior art are fixed on a vacuum tube mounting plate, a central rotating shaft drives a cam disc to rotate, the cam disc transmits motion to a roller moving close to the edge of the cam disc, so that the roller moves on a convex track of the cam disc, a switch shaft moves up and down through a radial rod, and the opening and closing states of the vacuum tubes are changed; the cam disc, the track, the roller and the radial rod in the existing equipment are all made of metal materials, in order to solve the problem of insulation between stages or between phases of the on-load tap-changer, the switch shaft is made of insulating materials, but the characteristics of the materials of the insulating materials enable the strength and the anti-wear resistance of the switch shaft to be lower, the problems that the insulating switch shaft is deformed (waist-shaped) due to force action in the process of switching the switch, an insert falls off due to thread abrasion of the insulating switch shaft and the like can be caused for a long time, and when the contact opening of the vacuum tube contact is adjusted, the vacuum on-load tap-changer can only adjust the opening of the contact by moving the fixed vacuum tube and is not easy to operate.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mechanical drive mechanism of dry-type vacuum on-load tap-changer to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a mechanical driving mechanism of a dry type vacuum on-load tap-changer comprises a base, wherein a driving device is installed at the bottom of the base, a first gear is installed on an output shaft of the driving device, the first gear is in meshing transmission connection with a second gear, the second gear is installed on the base, a transmission rod is fixedly installed on the second gear, a rocker is hinged to the tail end of the transmission rod, the other end of the rocker is hinged to the middle lower part of a rocker, the bottom end of the rocker is rotatably arranged on the base through a fixed shaft, and a driving lever is fixedly installed on the rocker below a hinged point of the rocker and the rocker;

a switching output shaft is arranged at the upper part of the base, a balance wheel is installed on the switching output shaft, a connecting rod is installed on the balance wheel, the end part of the connecting rod is connected with a first spring and a second spring, the other end of the first spring is connected to the upper end of the rocker arm, and the other end of the second spring is connected to the middle lower part of the rocker arm;

a first limiter and a second limiter are arranged below the balance wheel, a spring is connected between the first limiter and the second limiter to enable the first limiter and the second limiter to tend to approach towards the center of the balance wheel, and the deflector rod is arranged between one ends of the first limiter and the second limiter far away from the balance wheel;

the base is further rotatably provided with a third gear and a signal device, the third gear is in meshing transmission with the first gear, the signal device comprises a grooved pulley, and a grooved pulley shifting block for driving the signal device to rotate is arranged on the third gear.

Preferably, the driving device comprises a motor base, a driving motor and a screw rod, the motor base is fixedly installed on the base through the screw rod, the driving motor is fixedly installed on the motor base, and an output shaft of the motor base is connected with the first gear.

Preferably, a buffer block is installed on the switching output shaft, dampers are fixedly installed on the base on two sides of the switching output shaft, and the dampers correspond to the swing limit positions of the buffer block in position.

Preferably, a travel switch is fixedly mounted on the base below the switching output shaft.

Preferably, the rotating shaft of the first gear is connected with a selection output shaft.

Has the beneficial effects that: compared with the prior art, the beneficial effects of the utility model are that: the energy storage mechanism consisting of the first spring and the second spring can gradually store energy under the power input of the driving device, and the balance wheel can instantly, stably and accurately switch the contacts when the limiter is separated from the balance wheel; through the arrangement of the buffer block and the damper, the balance wheel can buffer the process from quick rotation to stop, and the service life is prolonged; the signal device and the digital arrangement on the signal device can display the gear of the tap changer, and the control and management are convenient.

Drawings

Fig. 1 is a schematic view of the overall structure of the mechanical driving mechanism of the dry vacuum on-load tap-changer according to the present invention.

In the drawings: 1-base, 2-motor base, 3-driving motor, 4-screw, 5-first gear, 6-second gear, 7-transmission rod, 8-rocker, 9-rocker, 10-fixed shaft, 11-deflector rod, 12-first limiter, 13-second limiter, 14-switching output shaft, 15-balance wheel, 16-connecting rod, 17-first spring, 18-second spring, 19-buffer block, 20-damper, 21-travel switch, 22-selection output shaft, 23-third gear, 24-signal device.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.

Examples

Referring to the attached drawings, in an embodiment of the present invention, a mechanical driving mechanism of a dry vacuum on-load tap changer includes a base 1, a driving device is installed at the bottom of the base 1, a first gear 5 is installed on an output shaft of the driving device, the first gear 5 is engaged and connected with a second gear 6, the second gear 6 is installed on the base 1, a transmission rod 7 is fixedly installed on the second gear 6, a rocker 8 is hinged to the end of the transmission rod 7, the other end of the rocker 8 is hinged to the middle lower portion of a rocker 9, the bottom end of the rocker 9 is rotatably installed on the base 1 through a fixed shaft 10, and a shift lever 11 is fixedly installed on the rocker 9 below the hinge point of the rocker 8 and the rocker 9;

a switching output shaft 14 is arranged at the upper part of the base 1, a balance 15 is installed on the switching output shaft 14, a connecting rod 16 is installed on the balance 15, a first spring 17 and a second spring 18 are connected to the end part of the connecting rod 16, the other end of the first spring 17 is connected to the upper end of the rocker arm 9, and the other end of the second spring 18 is connected to the middle lower part of the rocker arm 9;

a first stopper 12 and a second stopper 13 are arranged below the balance wheel 15, a spring is connected between the first stopper 12 and the second stopper 13, so that the first stopper 12 and the second stopper 13 both tend to approach the center of the balance wheel 15, and the shift lever 11 is arranged between one ends of the first stopper 12 and the second stopper 13 far away from the balance wheel 15;

the base 1 is further rotatably provided with a third gear 23 and a signal device 24, the third gear 23 is in meshing transmission with the first gear 5, the signal device 24 comprises a grooved pulley, and the third gear 23 is provided with a grooved pulley shifting block for driving the signal device 24 to rotate.

Further, the driving device comprises a motor base 2, a driving motor 3 and a screw rod 4, the motor base 2 is fixedly installed on the base 1 through the screw rod 4, the driving motor 3 is fixedly installed on the motor base 2, and an output shaft of the motor base 2 is connected with the first gear 5.

Furthermore, a buffer block 19 is installed on the switching output shaft 14, dampers 20 are fixedly installed on the base 1 on two sides of the switching output shaft 14, and the dampers 20 correspond to the swing limit positions of the buffer block 19 in position.

Further, a travel switch 21 is fixedly mounted on the base 1 below the switching output shaft 14.

Further, a selection output shaft 22 is connected to a rotating shaft of the first gear 5.

The using process comprises the following steps:

when the swing mechanism is used, the driving motor 3 is connected with the first gear 5 through a shaft key, the first gear 5 is connected with the selection output shaft 22, the first gear 5 drives the second gear 6 through gear meshing, the transmission rod 7 is riveted on the second gear 6, the transmission rod 7 drives the rocker 8, and the rocker 8 drives the rocker arm 9 to swing through the fixed shaft 10. The rocker arm 9 is provided with a first spring 17, a second spring 18, a shifting rod 11 and the like, the rocker arm 9 drives the first spring 17 and the second spring 18 to stretch gradually and drives the shifting rod 11 to shift the first stopper 12 and the second stopper 13 gradually, when the first spring 17 and the second spring 18 are set to reach the highest stretching point, one of the first stopper 12 and the second stopper 13 is disengaged from the position switch, and under the action of the tensile force of the first spring 17 and the second spring 18, the rocker arm 9 swings rapidly, so that the balance wheel 15 and the switching output shaft 14 are driven to rotate rapidly to a preset angle position. And then the first limiting stopper 12 and the second limiting stopper 13 are clamped into the balance wheel 15 clamping groove again to limit the positions of the balance wheel 15 and the switching output shaft 14.

During the rapid swing of the switching output shaft 14, the buffer block 19 impacts the damper 20, so that the switching output shaft 14 smoothly rotates to a predetermined angle.

When the first gear 5 drives the second gear 6, the first gear 5 also drives the third gear 23 to rotate, and the third gear 23 is provided with a sheave shifting block device which drives a sheave of the signal device 24 to rotate, so as to complete primary gear shifting.

In the process, the energy storage mechanism consisting of the first spring and the second spring can gradually store energy under the power input of the driving device, and the balance wheel can instantly, stably and accurately switch the contact when the limiter is separated from the balance wheel; through the arrangement of the buffer block and the damper, the balance wheel can buffer the process from quick rotation to stop, and the service life is prolonged; the signal device and the number arranged on the signal device can display the gear of the tap changer, so that the control and management are convenient; the application has the advantages of simple structure, strong practicability and simple operation and is worth popularizing.

The above are only the preferred embodiments of the present invention, and it should be noted that, for those skilled in the art, without departing from the concept of the present invention, a plurality of modifications and improvements can be made, which should also be considered as the protection scope of the present invention, and these will not affect the effect of the present invention and the practicability of the patent.

Claims

1. A mechanical driving mechanism of a dry type vacuum on-load tap-changer is characterized in that: the automatic transmission mechanism comprises a base (1), wherein a driving device is installed at the bottom of the base (1), a first gear (5) is installed on an output shaft of the driving device, the first gear (5) is connected with a second gear (6) in a meshing transmission mode, the second gear (6) is installed on the base (1), a transmission rod (7) is fixedly installed on the second gear (6), a rocker (8) is hinged to the tail end of the transmission rod (7), the other end of the rocker (8) is hinged to the middle lower portion of a rocker (9), the bottom end of the rocker (9) is rotatably arranged on the base (1) through a fixing shaft (10), and a shifting lever (11) is fixedly installed below the hinged point of the rocker (8) and the rocker (9) on the rocker (9);

a switching output shaft (14) is arranged at the upper part of the base (1), a balance wheel (15) is installed on the switching output shaft (14), a connecting rod (16) is installed on the balance wheel (15), a first spring (17) and a second spring (18) are connected to the end part of the connecting rod (16), the other end of the first spring (17) is connected to the upper end of the rocker arm (9), and the other end of the second spring (18) is connected to the middle lower part of the rocker arm (9);

a first stopper (12) and a second stopper (13) are arranged below the balance wheel (15), a spring is connected between the first stopper (12) and the second stopper (13) to enable the first stopper (12) and the second stopper (13) to tend to approach the center of the balance wheel (15), and the shift lever (11) is arranged between one ends, far away from the balance wheel (15), of the first stopper (12) and the second stopper (13);

the base (1) is further rotatably provided with a third gear (23) and a signal device (24), the third gear (23) is in meshing transmission with the first gear (5), the signal device (24) comprises a grooved pulley, and a grooved pulley shifting block for driving the signal device (24) to rotate is arranged on the third gear (23).

2. A mechanical drive mechanism for a dry vacuum on-load tap changer according to claim 1, characterized by: the driving device comprises a motor base (2), a driving motor (3) and a screw (4), the motor base (2) is fixedly installed on the base (1) through the screw (4), the driving motor (3) is fixedly installed on the motor base (2), and an output shaft of the motor base (2) is connected with the first gear (5).

3. A mechanical drive mechanism for a dry vacuum on-load tap changer according to claim 1, characterized by: the switch output shaft (14) is provided with a buffer block (19), dampers (20) are fixedly arranged on the base (1) on two sides of the switch output shaft (14), and the dampers (20) correspond to the swing limit positions of the buffer block (19) in position.

4. A mechanical drive mechanism for a dry vacuum on-load tap changer according to claim 1, characterized by: a travel switch (21) is fixedly arranged on the base (1) below the switching output shaft (14).

5. A mechanical drive mechanism for a dry vacuum on-load tap changer according to claim 1, characterized by: the rotating shaft of the first gear (5) is connected with a selective output shaft (22).