CN201796789U

CN201796789U - Limit device for manual control mechanism of off-circuit tap-changer

Info

Publication number: CN201796789U
Application number: CN201020552547XU
Authority: CN
Inventors: 史伟峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-30
Filing date: 2010-09-30
Publication date: 2011-04-13
Anticipated expiration: 2020-09-30

Abstract

The utility model relates to a limit device for a manual control mechanism of an off-circuit tap-changer, which comprises a box body connected with a handle, and an output shaft with a transmission component, wherein the output shaft is connected with a limit component, and the limit component is of a concave wheel which is in key connection with the output shaft; a pressure plate is fixed by a screw on the box body, the two ends of a limit shaft with a spring respectively penetrate through the pressure plate and the box body and are matched with a first limit piece and a last limit piece which are fixed on a limit wheel, and the concave wheel, and the limit shaft with the spring is arranged on the box body. The limit device has few parts, the shape of the parts is simple, and the parts are easy to process and assemble; the two limit pieces are directly fixed on the back surface of the limit wheel, and the limit wheel is directly matched with a gearwheel of the original control mechanism and does not occupy space; therefore, the limit devices has compact structure and small volume, and is especially suitable for preventing equipment damage accidents caused by over-range running due to the improper gear shift of the off-circuit tap-changer, thereby improving the reliability and safety of equipment.

Description

Off circuit tap changer manual control mechanism limit stopping means

Technical field

The utility model relates to the safety guard in a kind of manual control mechanism, particularly a kind of off circuit tap changer manual control mechanism limit stopping means.

Background technology

In the power transmission and transformation field, off circuit tap changer is being extensive use of as the control appliance of power transformer, as strip-shape tap switch and cage type tapping switch, respectively by moving horizontally and rotatablely moving, control moving contact and fixed contact being connected differently, thereby change the transformer coil number of turn, play the effect of regulation voltage.

Patent No. 200920013699.X " strip-like non-excitation tapping switch operating device ", what provide only is that the longitudinal fluting shift slot is set on handwheel, cooperates with shift slot by dog screw, and the adversary takes turns the gear shift location, can effectively prevent the sliding retaining of sub-connecting switch of transformer phenomenon, make accurate positioning reliable.

The patent No. 200720069794.2 " mechanical stop limiter of shunting switch selector ", the stopping means that provides, comprise the boss of sheave central authorities and roller and be arranged on position-arresting disk on the pedestal, pull out groove on the position-arresting disk by rotating shaft, respectively there is a braking bayonet socket at the position-arresting disk two ends, adaptive with the roller on the sheave, this constitutional detail is more, the complicated difficult processing of part shape, and stopping means will rotate two Zhou Shicai at pulley and work, and speed is slow.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of off circuit tap changer manual control mechanism limit stopping means is provided, be used to prevent that the shunting switch gearshift is improper, and the device damage accident that super scope operation is caused, thereby the reliability and the fail safe that improve equipment.

The technical scheme in the invention for solving the above technical problem is: off circuit tap changer manual control mechanism limit stopping means, comprise the output shaft that is connected with handle, band transmission component on the box body, be connected with limit assembly on the output shaft, recessed take turns of described limit assembly for being connected with the output axle key, also be screwed pressing plate on the described box body, be installed in the two ends of the limit shaft that has spring on the box body, pass head, last banking stop and recessed wheel the fixing on pressing plate and box body and the position-limited wheel respectively and cooperate.

Compared with prior art, advantage of the present utility model is: this limit stopping means by the banking stop on the position-limited wheel, be installed in install on pressing plate, limit shaft, spring and the output shaft on the cassette holder recessed and take turns and cooperate institute to constitute, its part is few, simple, the easy processing of part shape, easily assembling, two banking stops directly are fixedly mounted on the back side of position-limited wheel, and position-limited wheel directly share the gear wheel of former operating mechanism, do not take the useful space, therefore its compact conformation, volume are little, and output shaft whenever turns around and all can touch the screw that is used to place banking stop on the position-limited wheel.

Description of drawings

Fig. 1, the utility model user mode reference diagram (be installed in the manual control mechanism, take away loam cake and display part).

The rearview of Fig. 2, Fig. 1 (transmission component of manual control mechanism is taken away base plate).

Fig. 3, recessed structural representation of taking turns.

The A-A view of Fig. 4, Fig. 1 (spacing state).

The A-A view of Fig. 5, Fig. 1 (non-spacing state).

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is further described.

The shape of first, last banking stop 10,13, size are the same, and for there is the rectangular block of through hole the centre, upper surface through hole and edge all are circular arc.

Be connected with position-limited wheel 1 with key on the spacing wheel shaft of box body 4 one ends, position-limited wheel is the gear wheel in the former manual control mechanism, and promptly position-limited wheel share former gear wheel.

There is a uniform n screw 2 at the edge of position-limited wheel 1, according to the needs of capacity and conversion gear optional be used in 1～7 8 or 9 or n make the gear of first and last, as: at this moment can be respectively with first or the 8th screw 2 place first, that last banking stop 10,13 be placed on the back position of position-limited wheel 1, and with screw with screw 2 places on the back side first, that last banking stop 10,13 is fixed on position-limited wheel 1.

Recessedly take turns 8 for annular, be connected with key on the centre position of output shaft 9, recessed wheel outer surface has the groove of circular arc at 1/2～1/4 place of girth.

Be connected with handle 5 by worm gear, worm screw on the output shaft 9, be transferred to engaging tooth 3 by gear-driven assembly 7 on the output shaft, drive position-limited wheel 1 by engaging tooth 3 and rotate.

Limit shaft 11 is that ladder is cylindrical, is with spring 12 on cascaded surface, and its lower end is a sphere shape.

On 4 cross sections of the box body below the position-limited wheel 1, shoulder hole is arranged, and pressing plate 6 is fixed on the upper surface of box body 4 one ends with screw.

The through hole on pressing plate 6 and the box body 4 is passed at the two ends of limit shaft 11 respectively, extends to outside pressing plate and the box body.

Needs according to transformer capacity and actual gearshift, last banking stop 13 and first banking stop 10 can be installed in the screw 2 of any position of position-limited wheel, first banking stop 10 is to use when big gear is shifted to little gear direction, and last banking stop 13 is to use when little gear is shifted to big gear direction.

As if screw 2 places that first banking stop 10 are screwed in position-limited wheel first gear positions, end banking stop 13 is fixed on the position of the 8th gear, at this moment turning handle 5 output shafts 9 contrary or clockwise direction rotations, drive simultaneously with output shaft 9 is fixed together and recessedly take turns 8 and rotate, position-limited wheel rotates by the speed of design under meshing gear 3 drives, when first banking stop 10 is run on the top of limit shaft 11, because the rotation of output shaft 9, driving position-limited wheel 1 by the gear-driven assembly on the output shaft 7 simultaneously rotates, when limit shaft 11 turns to arcwall face over against first banking stop 10 intermediate throughholes places, just insert in the first banking stop, give 1 one resistances of position-limited wheel, thereby make it can not be rotated further the purpose that reaches self-locking again, as shown in Figure 4.

Another mistake clockwise turning handle 5, make it rotate an angle, output shaft drives recessed the wheel and also rotates an angle to recessed groove location of taking turns simultaneously, makes the recessed 8 pairs of limit shaft non-resistances of taking turns, and at this moment limit shaft 11 is under the effect of spring 12 power, a distance just moves up, just insert in the recessed circular groove of taking turns on 8 upper end of limit shaft, and simultaneously the end of limit shaft 11 is also decorporated from the through hole of first banking stop, at this moment output shaft, recessedly take turns, position-limited wheel non-resistance all, but operate as normal again, as shown in Figure 5.

In like manner, if at output shaft, recessedly take turns, in the rotation of position-limited wheel, when limit shaft 11 is run into the locational last banking stop 13 of position-limited wheel the 8th retaining, just carry out the self-locking of end limits position, whole process is the same not to be described in detail (figure draws).

Claims

1. off circuit tap changer manual control mechanism limit stopping means, comprise and be connected with handle (5) on the box body (4), the output shaft (9) of band transmission component (7), output shaft is connected with limit assembly on (9), it is characterized in that recessed take turns (8) of described limit assembly for being connected with output shaft (9) key, also be screwed pressing plate (6) on the described box body (4), be installed in the two ends of the limit shaft (11) that has spring (12) on the box body (4), pass pressing plate (6) and box body (4) respectively and go up fixing head with position-limited wheel (1), end banking stop (10,13) and recessed wheel the (8) cooperate.

2. off circuit tap changer manual control according to claim 1 mechanism limit stopping means, it is characterized in that described recessed wheel the (8) is annular, be connected with key on the centre position of output shaft (9), recessed wheel outer surface has the groove of circular arc at 1/2～1/4 place of girth.

3. off circuit tap changer manual control according to claim 1 mechanism limit stopping means, it is characterized in that described output shaft (9) upward is connected with handle (5) by worm gear, worm screw, be transferred to engaging tooth (3) by gear-driven assembly (7) on the output shaft, drive position-limited wheel (1) by engaging tooth (3) and rotate.

4. off circuit tap changer manual control according to claim 1 mechanism limit stopping means, it is characterized in that described limit shaft (11) is cylindrical for ladder, on cascaded surface, be with spring (12), its lower end is a sphere shape, the through hole on pressing plate (6) and the box body (4) is passed at its two ends respectively, extends to outside pressing plate and the box body.

5. off circuit tap changer manual control according to claim 1 mechanism limit stopping means, the shape, the size that it is characterized in that described head, last banking stop (10,13) are the same, for there is the rectangular block of through hole the centre, upper surface through hole and edge all are circular arc.