Circuit breaker tripping mechanism of mining vacuum power distribution device

Abstract

A circuit breaker tripping mechanism of a mining vacuum power distribution device comprises a pull rod, a shaft sleeve seat is sleeved in the middle of the pull rod, the shaft sleeve seat is fixedly installed on the side wall of an inner cavity of a power distribution box body, one end of the pull rod penetrates out of the power distribution box body and is fixedly provided with a handle plate, and the other end of the pull rod is connected with one end of a connecting rod through a first pin. The other end of the connecting rod is connected with the upper end of a rotating connecting rod through a second pin, the lower end of the rotating connecting rod is provided with a bending pressing plate, and the middle of the rotating connecting rod is rotatably connected with a supporting column which is fixedly installed on the side wall of the inner cavity of the distribution box body. And the lower surface of the bending pressing plate is movably contacted with a circuit breaker tripping pressing plate on the side surface of the circuit breaker. According to the utility model, the defects in the prior art are overcome, the pull rod type tripping structure is adopted, and the handle plate can be directly arranged on the front surface of the distribution box body, so that the front surface tripping operation of the circuit breaker can be realized, the tripping operation is more convenient and faster, and the side surface space is effectively saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power equipment technical field, concretely relates to a mine vacuum distribution device circuit breaker tripping mechanism. BACKGROUND

[0002] The explosion-proof and intrinsically safe high-voltage vacuum distribution cabinet is suitable for the underground environment containing methane and gas. In the existing vacuum distribution cabinet, the tripping mechanism is generally located outside the shell, and the tripping mode of the circuit breaker usually adopts a single side knob type tripping mode, that is, the knob extends the pressing plate, and the tripping is realized by pressing. However, this operation mode is generally on the side of the distribution box body, and the operation is not convenient. If the distribution device is connected in series, the conventional tripping mechanism also needs to leave a certain side space, which leads to that part of the side space is not utilized. SUMMARY

[0003] In view of the defects of the prior art, the utility model provides a mine vacuum distribution device circuit breaker tripping mechanism, which overcomes the defects of the prior art, is reasonable in design, adopts a pull rod type tripping structure, can directly set a handle plate on the front of the distribution box body, realizes front tripping operation of the circuit breaker, makes the tripping operation more convenient and fast, and effectively saves the side space.

[0004] To achieve the above purpose, the utility model realizes the following technical scheme:

[0005] A mine vacuum distribution device circuit breaker tripping mechanism, comprising a pull rod, a shaft sleeve seat is sleeved in the middle of the pull rod, the shaft sleeve seat is fixedly installed on the inner cavity side wall of the distribution box body, one end of the pull rod penetrates out of the distribution box body and is fixedly installed with a handle plate, the other end of the pull rod is connected with one end of a connecting rod through a first pin, the other end of the connecting rod is connected with the upper end of a rotating connecting rod through a second pin, the lower end of the rotating connecting rod is provided with a bent pressing plate, a support is rotatably connected in the middle of the rotating connecting rod, and the support is fixedly installed on the inner cavity side wall of the distribution box body.

[0006] The lower surface of the bent pressing plate is in movable contact with the circuit breaker tripping pressing plate on the side of the circuit breaker.

[0007] Preferably, a pull spring mounting hole is formed on the surface of the rotating connecting rod, the pull spring mounting hole is located between the support and the second pin, one end of a pull spring connected on the pull spring mounting hole, the other end of the pull spring is installed with a pull spring support, the pull spring support is fixedly installed on the inner cavity side wall of the distribution box body, and the position of the pull spring support is located on the side of the rotating connecting rod away from the pull rod.

[0008] Preferably, the pull rod is externally sleeved with a limiting spring, and the pull rod is fixedly installed with a supporting pin shaft at one end close to the first pin, one end of the limiting spring abuts against the supporting pin shaft, and the other end of the limiting spring abuts against the shaft sleeve seat.

[0009] Preferably, the pull rod is externally sleeved with a copper shaft sleeve at one end close to the handle plate, and the copper shaft sleeve is fixedly embedded on the surface of the distribution box body.

[0010] The utility model provides a kind of mine vacuum distribution device circuit breaker tripping mechanism.It has the following beneficial effects: by pulling handle plate, thereby driving pull rod moves along axial direction to the outside of distribution box body, in turn can be driven by connecting rod transmission effect;To pull the upper end of rotating connecting rod and move to the outside of distribution box body;Therefore can be by lever principle, to make rotating connecting rod with pillar as center of rotation;In turn can drive the downward pressing of the bending pressing plate of rotating connecting rod lower end to circuit breaker trip pressing plate, to make circuit breaker trip pressing plate trip, to realize the operation of circuit breaker tripping opening. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme in the utility model or prior art, the following will be a brief introduction to the drawings needed to be used in prior art description.

[0012] Fig. 1 The structural schematic diagram of the utility model;

[0013] Fig. 2 The structural schematic diagram of the utility model after installation;

[0014] Fig. 3 The structural schematic diagram of the utility model cooperating with circuit breaker;

[0015] Explanation of reference numerals in the drawings:

[0016] 1, pull rod;2, shaft sleeve seat;3, distribution box body;4, handle plate;5, first pin;6, connecting rod;7, second pin;8, rotating connecting rod;9, bending pressing plate;10, pillar;11, tension spring mounting hole;12, tension spring;13, tension spring pillar;14, limiting spring;15, supporting pin shaft;16, copper shaft sleeve;17, circuit breaker;18, circuit breaker trip pressing plate. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantage of the utility model more clear, the following will be combined with the drawings in the utility model, to clearly and completely describe the technical scheme in the utility model.

[0018] Example 1, as Figs. 1-3 As shown, a tripping mechanism for a mine vacuum power distribution device includes a pull rod 1, with a bushing seat 2 sleeved in the middle of the pull rod 1. The bushing seat 2 is fixedly installed on the inner cavity side wall of the distribution box 3. One end of the pull rod 1 extends out of the distribution box 3 and is fixedly installed with a handle plate 4. The other end of the pull rod 1 is rotatably connected to one end of a connecting rod 6 through a first pin 5. The other end of the connecting rod 6 is rotatably connected to the upper end of a rotating connecting rod 8 through a second pin 7. A bending pressure plate 9 is provided at the lower end of the rotating connecting rod 8. A support column 10 is rotatably connected in the middle of the rotating connecting rod 8. The support column 10 is fixedly installed on the inner cavity side wall of the distribution box 3.

[0019] The lower surface of the bent pressure plate 9 is in active contact with the circuit breaker trip pressure plate 18 on the side of the circuit breaker 17.

[0020] Working principle:

[0021] When the circuit breaker 17 inside the distribution box 3 is in the closed state, the circuit breaker tripping plate 18 is in a horizontal position. When it is necessary to trip the circuit breaker 17, by pulling the handle plate 4, the pull rod 1 is moved axially outward from the distribution box 3, which in turn moves one end of the connecting rod 6 at the end of the pull rod 1 outward from the distribution box 3. Then, the other end of the connecting rod 6 can be used to pull the upper end of the rotating connecting rod 8 outward from the distribution box 3. Since the rotating connecting rod 8 is rotatably connected to the inner wall of the distribution box 3 through the support column 10, the lever principle can be used to make the rotating connecting rod 8 rotate around the support column 10. This can then drive the bent pressure plate 9 at the lower end of the rotating connecting rod 8 to rotate downward, pressing the circuit breaker tripping plate 18. After reaching a certain pressure, the circuit breaker tripping plate 18 will trip, thus realizing the tripping operation of the circuit breaker 17.

[0022] Furthermore, in this utility model, by adopting a pull rod-type tripping structure, the handle plate 4 can be directly set on the front of the distribution box 3, thereby enabling the circuit breaker 17 to be tripped from the front, making the tripping operation more convenient and quick, and effectively saving side space.

[0023] In embodiment two, as a further preferred embodiment one, a tension spring mounting hole 11 is provided on the surface of the rotating connecting rod 8. The tension spring mounting hole 11 is located between the support column 10 and the second pin 7. One end of the tension spring 12 is connected to the tension spring mounting hole 11, and a tension spring support column 13 is installed on the other end of the tension spring 12. The tension spring support column 13 is fixedly installed on the inner cavity side wall of the distribution box 3, and the position of the tension spring support column 13 is located on the side of the rotating connecting rod 8 away from the pull rod 1.

[0024] Therefore, when the circuit breaker 17 is tripped, the connecting rod 6 and the upper end of the rotating connecting rod 8 are moved outwardly from the distribution box 3 by the pull rod 1, and the tension spring 12 is stretched. When the tripping operation of the circuit breaker 17 is completed, the pull handle plate 4 can be directly released, and the rotating connecting rod 8 can be quickly returned to the initial position by the elastic tension of the tension spring 12, thereby effectively preventing the problem of not being able to close the switch due to the forgetting of the reset operation. Moreover, since the bending pressing plate 9 and the circuit breaker tripping pressing plate 18 are in a separated contact mode, the other operations of the circuit breaker 17 are not affected.

[0025] In the third embodiment, as a further preferred solution of the first embodiment, the outer surface of the pull rod 1 is sleeved with a limiting spring 14, and a supporting pin shaft 15 is fixedly installed at one end of the pull rod 1 close to the first pin 5, one end of the limiting spring 14 abuts against the supporting pin shaft 15, and the other end of the limiting spring 14 abuts against the shaft sleeve seat 2. The displacement distance of the pull rod 1 can be limited by the limiting spring 14, and when the pull handle plate 4 is pulled excessively, the limiting spring 14 can abut against the side surface of the shaft sleeve seat 2, thereby achieving the buffering and limiting effect by the limiting spring 14. Thus, the problem of damage to the entire circuit breaker tripping mechanism due to excessive pulling of the pull handle plate 4 can be effectively avoided.

[0026] In the fourth embodiment, as a further preferred solution of the first embodiment, a copper shaft sleeve 16 is sleeved on the outer surface of one end of the pull rod 1 close to the pull handle plate 4, and the copper shaft sleeve 16 is fixedly embedded on the surface of the distribution box 3. The smoothness of the horizontal movement of the pull rod 1 can be effectively ensured by the positioning effect of the copper shaft sleeve 16 and the shaft sleeve seat 2. Moreover, the explosion-proof performance of the distribution box 3 can also be effectively ensured by the copper shaft sleeve 16.

[0027] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A tripping mechanism for a circuit breaker in a mine vacuum power distribution device, characterized in that: Includes a pull rod (1), with a bushing seat (2) sleeved in the middle of the pull rod (1). The bushing seat (2) is fixedly installed on the inner cavity side wall of the distribution box (3). One end of the pull rod (1) extends out of the distribution box (3) and is fixedly installed with a handle plate (4). The other end of the pull rod (1) is connected to one end of a connecting rod (6) through a first pin (5). The other end of the connecting rod (6) is connected to the upper end of a rotating connecting rod (8) through a second pin (7). A bending pressure plate (9) is provided at the lower end of the rotating connecting rod (8). A support column (10) is rotatably connected in the middle of the rotating connecting rod (8). The support column (10) is fixedly installed on the inner cavity side wall of the distribution box (3). The lower surface of the bending pressure plate (9) is in active contact with the circuit breaker tripping pressure plate (18) on the side of the circuit breaker (17).

2. The tripping mechanism of a mine vacuum power distribution device circuit breaker according to claim 1, characterized in that: The rotating connecting rod (8) has a tension spring mounting hole (11) on its surface. The tension spring mounting hole (11) is located between the support column (10) and the second pin (7). One end of the tension spring (12) is connected to the tension spring mounting hole (11). The other end of the tension spring (12) is equipped with a tension spring support column (13). The tension spring support column (13) is fixedly installed on the inner cavity side wall of the distribution box (3). The position of the tension spring support column (13) is located on the side of the rotating connecting rod (8) away from the pull rod (1).

3. The tripping mechanism of a mine vacuum power distribution device circuit breaker according to claim 1, characterized in that: A limiting spring (14) is sleeved on the outer surface of the pull rod (1). A support pin (15) is fixedly installed at one end of the pull rod (1) near the first pin (5). One end of the limiting spring (14) abuts against the support pin (15), and the other end of the limiting spring (14) abuts against the bushing seat (2).

4. The tripping mechanism of a mine vacuum power distribution device circuit breaker according to claim 1, characterized in that: A copper bushing (16) is fitted onto the outer surface of the end of the pull rod (1) near the handle plate (4), and the copper bushing (16) is fixedly embedded in the surface of the distribution box (3).

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