CN210296225U

CN210296225U - Self-locking mechanism of vacuum switch

Info

Publication number: CN210296225U
Application number: CN201922438088.6U
Authority: CN
Inventors: 王明
Original assignee: ANHUI YUTENG VACUUM ELECTRICAL CO LTD
Current assignee: ANHUI YUTENG VACUUM ELECTRICAL CO LTD
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-04-10
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a self-locking mechanism of a vacuum switch, which is used in a flexible direct-current extra-high voltage power transmission system and comprises a pure iron plate; a base plate; a pillar; the fixing seat comprises a guide hole penetrating along the vertical direction and a mounting hole which is arranged on the side surface, extends towards the direction of the inner wall of the guide hole and penetrates through the inner wall of the guide hole; the upper end of the transmission shaft sequentially penetrates through the guide hole and the pure iron plate upwards, the lower end of the transmission shaft is positioned between the pure iron plate and the base, the transmission shaft comprises a guide section which is sleeved in the guide hole and can reciprocate up and down along the guide hole, and the transmission shaft is movably matched with the pure iron plate and can reciprocate up and down along the guide hole; the limiting groove extends along the circumferential direction of the guide section; the first elastic piece is arranged in the mounting hole; the limiting ball is arranged in the mounting hole and is positioned between the first elastic piece and the guide section; the lower end of the mounting piece is fixed with the upper surface of the bottom plate, and the upper end of the mounting piece extends upwards; a limiting member; the second elastic piece is arranged between the lower end face of the transmission shaft and the limiting piece. The device can accelerate the response speed of opening and closing and reduce the cost.

Description

Self-locking mechanism of vacuum switch

Technical Field

The utility model relates to a vacuum switch's controlgear among flexible direct current extra-high voltage converter valve control power transmission system, concretely relates to vacuum switch's self-locking mechanism.

Background

The flexible direct current extra-high voltage converter valve control is a solid-state switch formed by power electronic devices, and the direct current has no zero crossing, so the existing alternating current vacuum circuit breaker can not be applied for switching on and switching off. At present, in a flexible direct-current extra-high voltage converter valve power transmission system, an improved vacuum switch is adopted, a magnetic mechanism is adopted to maintain the vacuum switch during opening and closing, the excitation time is long, the response speed is low during switching of opening and closing states, a permanent magnet is needed for the magnetic mechanism, and the product cost is high.

Therefore, how to shorten the switch response time and reduce the product cost becomes an urgent technical problem to be solved.

Disclosure of Invention

An object of the utility model is to provide a vacuum switch's self-locking mechanism can accelerate divide-shut brake response speed and reduce cost.

The utility model is used for realize the technical scheme as follows of above-mentioned purpose:

a self-locking mechanism of a vacuum switch, the vacuum switch is used in a flexible direct current extra-high voltage transmission system, and comprises:

a pure iron plate;

a base plate;

the upper end of the strut is fixed with the pure iron plate, and the lower end of the strut is fixed with the bottom plate;

the fixing seat is fixed on the lower surface of the pure iron plate and comprises a guide hole penetrating along the vertical direction and a mounting hole which is arranged on the side surface of the fixing seat, extends towards the direction of the inner wall of the guide hole and penetrates through the inner wall of the guide hole;

the upper end of the transmission shaft sequentially penetrates through the guide hole and the pure iron plate upwards and extends out, the lower end of the transmission shaft is positioned between the pure iron plate and the base, the transmission shaft comprises a guide section which is sleeved in the guide hole and can move up and down along the guide hole in a reciprocating manner, and the guide section is movably matched with the pure iron plate and can move up and down in a reciprocating manner along the guide hole;

the limiting groove is arranged on the guide section and extends along the circumferential direction of the guide section;

the first elastic piece is arranged in the mounting hole;

the limiting ball is arranged in the mounting hole and is positioned between the first elastic piece and the guide section;

the lower end of the mounting piece is fixed with the upper surface of the bottom plate, and the upper end of the mounting piece extends upwards and points to the end surface of the lower end of the transmission shaft;

a limiting member arranged on the mounting member;

and the second elastic piece is arranged between the lower end face of the transmission shaft and the limiting piece.

The first elastic piece is a pressure spring.

The second elastic part is a top spring sleeved outside the mounting part.

The guide section is provided with a boss at the periphery of the end facing the base.

The mounting piece is provided with an external thread, the limiting piece is provided with a through hole, the inner wall of the through hole is provided with an internal thread, and the mounting piece and the limiting piece are screwed together; or the mounting part and the limiting part are integrally manufactured, and the lower end of the mounting part is screwed with the nut fixed on the upper surface of the bottom plate.

The inner diameter of the through hole for the transmission shaft to pass through is smaller than the outer diameter of the guide section.

The guide section is in sliding fit with the guide hole.

The adjusting piece is screwed with the mounting hole from the hole opening of the mounting hole on the side surface of the fixed seat.

The utility model has the advantages that:

the utility model discloses when being applied to the vacuum switch who is arranged in flexible direct current special high voltage transmission system, the utility model discloses a transmission shaft upper end is connected with this vacuum switch's moving contact, and vacuum switch's actuating mechanism drive transmission shaft reciprocates along the guiding hole. When the vacuum switch separating brake, this vacuum switch's actuating mechanism drive transmission shaft moves down, the utility model discloses with the transmission shaft locking, can guarantee that this vacuum switch reliably keeps the separating brake state, during the combined floodgate, the utility model discloses a second elastic component extends the lower extreme terminal surface that withstands the transmission shaft, can guarantee the utility model discloses the moving contact reliably keeps in contact with the static contact, prevents that the moving contact from the malfunction, guarantees the reliability of branch, combined floodgate. The utility model discloses its simple structure of self-locking mechanism, dependable performance are stable, have used the mechanics principle in a flexible way to reach the utility model discloses the function that separating brake auto-lock and combined floodgate kept. Keep for traditional magnetic force, the utility model discloses need not excitation time and permanent magnet, can accelerate divide-shut brake response speed and reduce cost.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the fixing base of the present invention.

Detailed Description

The following examples are given to illustrate the invention and it is necessary to point out here that the following examples are only given for the purpose of further illustration of the invention and are not to be construed as limiting the scope of the invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The description in the present application relating to "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Fig. 1-2 illustrate an embodiment of a self-locking mechanism of a vacuum switch, among many embodiments of the present invention. The vacuum switch is used in a flexible direct-current extra-high voltage power transmission system, and the self-locking mechanism of the vacuum switch comprises a pure iron plate 1, a bottom plate 2, a support column 3, a fixed seat 4, a transmission shaft 5, a first elastic piece 6, a limiting ball 7, an installation piece 8, a limiting piece 9 and a second elastic piece 10.

The pure iron plate 1 and the bottom plate 2 may be, but not limited to, a flat plate structure.

The upper end of the pillar 3 is fixed with the pure iron plate 1, and the lower end thereof is fixed with the bottom plate 2. The support 3 is used for fixedly connecting the pure iron plate 1 with the bottom plate 2. The number of the pillars 3 is 4, and the pillars are distributed in a quadrilateral shape. It will be appreciated that the number of struts 3 is not a particular value, but may be other numbers according to practical requirements. When the utility model is arranged according to the mode shown in figure 1, the support column 3 plays a supporting role.

The fixing base 4 is fixed on the lower surface of the pure iron plate 1, and includes a guide hole 41 penetrating along the vertical direction thereof and a mounting hole 42 provided on the side surface thereof to extend toward the inner wall of the guide hole 41 and penetrating through the inner wall of the guide hole 41.

The upper end of the transmission shaft 5 sequentially penetrates through the guide hole 41 and the pure iron plate 1 upwards and extends out, the lower end of the transmission shaft is positioned between the pure iron plate 1 and the base 4, the transmission shaft comprises a guide section 51 which is sleeved in the guide hole 41 and can reciprocate up and down along the guide hole 41, and the guide section is movably matched with the pure iron plate 1 and can reciprocate up and down along the guide hole 41. The guide section 51 preferably has a sliding fit with the guide hole 41. The drive shaft 5 may be a cylindrical stepped shaft.

The stopper groove 52 is provided in the guide section 51, and extends circumferentially along the guide section 51. The retainer grooves 52 preferably extend circumferentially along the guide section 51 in end-to-end communication.

The first elastic member 6 is disposed in the mounting hole 42. The first elastic member 6 may be, but is not limited to, a compression spring.

The limiting ball 7 is a spherical structure and is disposed in the mounting hole 42 and between the first elastic member 6 and the guiding section 51. The stop ball 7 may be, but is not limited to, a steel ball.

The lower end of the mounting part 8 is fixed with the upper surface of the bottom plate 2, and the upper end extends upwards and points to the lower end face of the transmission shaft 5. The mount 8 can prevent the downward movement of the drive shaft 5 from exceeding the allowable range.

The limiting member 9 is provided to the mounting member.

The second elastic element 10 is disposed between the lower end surface of the transmission shaft 5 and the limiting element. The second elastic member 10 may be, but is not limited to, a top spring sleeved outside the mounting member 8.

In some embodiments, the inner diameter of the through hole of the pure iron plate 1 for the transmission shaft 5 to pass through is smaller than the outer diameter of the guide section 51 to prevent the transmission shaft 5 from moving upward beyond the allowable range.

In some embodiments, the guide section 51 has a boss 53 on the outer periphery of the end facing the base 5, and the boss 53 limits the upward movement stroke of the transmission shaft 5 so as to prevent the second elastic member 10 from being located too far upward and damaging the movable contact and/or the fixed contact of the vacuum switch.

In some embodiments, the mounting member 8 and the limiting member 9 are integrally formed, the lower end of the mounting member 8 is screwed with the nut 11 fixed on the upper surface of the base plate 2, the mounting member 8 is rotated to conveniently adjust the torque of the second elastic member 10, and the height of the upper end surface of the mounting member 8 relative to the upper surface of the base plate 5 can be adjusted to adjust the stroke of the downward movement of the transmission shaft 5. Or, installed part 8 has the external screw thread, and locating part 9 has the through-hole, and the through-hole inner wall has the internal thread, and installed part 8 closes with locating part 9 soon, and rotatory locating part 9 can conveniently adjust the second elastic component 10 moment size.

In some embodiments, the utility model discloses still include regulating part 12, regulating part 12 is located the drill way and the mounting hole 42 of fixing base 4 side from mounting hole 42 and closes soon, and first elastic component 6 moment size can be adjusted to rotatory regulating part 12 to adjust the pressure of spacing ball 7 to spacing groove 52, and then adjust the size of self-locking power.

The utility model discloses when being applied to the vacuum switch who is arranged in flexible direct current special high voltage transmission system, the utility model discloses a 5 upper ends of transmission shaft are connected with this vacuum switch's moving contact (not shown in the figure), and vacuum switch's actuating mechanism (not shown in the figure) drive transmission shaft 5 reciprocates along guiding hole 41. When the vacuum switch is opened, the driving mechanism of the vacuum switch applies a downward acting force to the transmission shaft 5, and the acting force overcomes the second elastic element 10 to apply an upward jacking force to the transmission shaft 5, so that the transmission shaft 5 is driven to move downwards. The limiting ball 7 is pressed on the side surface of the transmission shaft 5 under the elastic action of the first elastic piece 6, the limiting ball 7 and the side surface of the transmission shaft 5 jointly form a rolling pair, and in the downward movement process of the transmission shaft 5, the transmission shaft 5 moves downward to drive the limiting ball 7 to rotate in the mounting hole 42 under the action of friction force. With the continuous downward movement of the transmission shaft 5, the limiting groove 52 and the hole opening of the mounting hole 42 on the inner wall of the guide hole 41 are gradually aligned in opposite directions, in the process, the limiting ball 7 gradually moves from the side wall of the transmission shaft 5 to the limiting groove 52 under the elastic action of the first elastic piece 6 until the limiting ball 7 partially enters the limiting groove 52 and cannot move to the bottom surface of the limiting groove 52 any more, at the moment, the limiting ball 7 partially is located in the limiting groove 52, the rest of the limiting ball 7 is located in the mounting hole 42, the limiting ball 7, the limiting groove 52 and the mounting hole 42 are mutually matched to lock the transmission shaft 5 and cannot freely move up and down, the vacuum switch is guaranteed to be reliably kept in a brake-separating state, and the brake-separating self-locking function of the vacuum switch.

When the switch is switched on, the driving mechanism of the vacuum switch applies an upward acting force to the transmission shaft 5 and the second elastic element 10 applies an upward jacking force to the transmission shaft 5, the transmission shaft 5 moves upwards, when the transmission shaft 5 just starts to move upwards, the limiting ball 7 is subjected to the acting force of the side wall opening edge of the limiting groove 52, one component of the acting force is directed to the first elastic element 6, the component overcomes the acting force of the first elastic element 6 on the limiting ball 7 to push the limiting ball 7 to move towards the direction far away from the transmission shaft 5 along the mounting hole 42, the limiting ball 7 moves gradually towards the direction far away from the transmission shaft 5 along the mounting hole 42 along with the continuous upward movement of the transmission shaft 5, the first elastic element 6 is gradually compressed, and the self-locking is released after the limiting ball 7 is completely separated from the limiting groove 52. The transmission shaft 5 continues to move upwards again, the limiting ball 7 is pressed on the side face of the transmission shaft 5 under the elastic action of the first elastic piece 6, the limiting ball 7 and the side face of the transmission shaft 5 jointly form a rolling pair, in the upward movement process of the transmission shaft 5, under the action of friction force, the transmission shaft 5 moves upwards to drive the limiting ball 7 to rotate in the mounting hole 42, and after the transmission shaft 5 moves upwards to the place, the second elastic piece 10 extends upwards to prop against the transmission shaft 5, so that the vacuum switch is guaranteed to be reliably kept in a switch-on state, and the function of keeping the vacuum switch in a switch-on state is achieved. The second elastic member 10 may also serve to cushion the downward movement of the driving shaft 5.

It should be noted that the various features described in the foregoing embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not describe every possible combination.

The present invention has been described in detail with reference to the embodiments, which are illustrative rather than restrictive, and variations and modifications may be effected without departing from the general inventive concept within the scope thereof.

Claims

1. The utility model provides a self-locking mechanism of vacuum switch, vacuum switch are arranged in flexible direct current extra-high voltage transmission system, its characterized in that includes:

a pure iron plate (1);

a base plate (2);

the upper end of the strut (3) is fixed with the pure iron plate (1), and the lower end of the strut is fixed with the bottom plate (2);

the fixing seat (4) is fixed on the lower surface of the pure iron plate (1) and comprises a guide hole (41) which penetrates through the fixing seat along the vertical direction and a mounting hole (42) which is arranged on the side surface of the fixing seat, extends towards the inner wall direction of the guide hole (41) and penetrates through the inner wall of the guide hole (41);

the upper end of the transmission shaft (5) sequentially penetrates through the guide hole (41) and the pure iron plate (1) upwards and extends out, the lower end of the transmission shaft is positioned between the pure iron plate (1) and the base, the transmission shaft comprises a guide section (51) which is sleeved in the guide hole (41) and can move up and down along the guide hole (41), and the guide section is movably matched with the pure iron plate (1) and can move up and down along the guide hole (41);

a stopper groove (52) provided in the guide section (51) and extending in the circumferential direction of the guide section (51);

a first elastic member (6) disposed in the mounting hole (42);

the limiting ball (7) is arranged in the mounting hole (42) and is positioned between the first elastic piece (6) and the guide section (51);

the lower end of the mounting piece (8) is fixed with the upper surface of the bottom plate (2), and the upper end of the mounting piece extends upwards and points to the end surface of the lower end of the transmission shaft (5);

a stopper (9) provided to the mounting member (8);

and the second elastic piece (10) is arranged between the lower end face of the transmission shaft (5) and the limiting piece (9).

2. Self-locking mechanism according to claim 1, characterized in that the first elastic element (6) is a compression spring.

3. Self-locking mechanism according to claim 1, wherein the second resilient member (10) is a spring fitted around the mounting member (8).

4. Self-locking mechanism according to claim 1, characterized in that the guide section (51) has a projection (53) on its periphery towards the base end.

5. The self-locking mechanism of claim 1, wherein the mounting member (8) has an external thread, the limiting member (9) has a through hole, the inner wall of the through hole has an internal thread, and the mounting member (8) is screwed with the limiting member (9); or the mounting piece (8) and the limiting piece (9) are integrally manufactured, and the lower end of the mounting piece (8) is screwed with a nut (11) fixed on the upper surface of the bottom plate (2).

6. The self-locking mechanism according to claim 1, wherein the inner diameter of the through hole of the pure iron plate (1) for the transmission shaft (5) to pass through is smaller than the outer diameter of the guide section (51).

7. Self-locking mechanism according to claim 1, wherein the guide section (51) is a sliding fit with the guide hole (41).

8. The self-locking mechanism according to any one of claims 1 to 7, further comprising an adjusting member (12), wherein the adjusting member (12) is screwed with the mounting hole (42) from an opening of the mounting hole (42) located on the side surface of the fixed seat (4).