Indoor vacuum circuit breaker with positioning pin

Abstract

The utility model discloses an indoor vacuum circuit breaker with a positioning pin. The indoor vacuum circuit breaker comprises a cabinet body and a circuit breaker handcart, a positioning pin is fixed at the front end of the bottom plate of the circuit breaker handcart; a limiting sliding block is fixed to the rear portion of the bottom of the bottom plate, and limiting protruding blocks protrude from the two sides of the bottom of the limiting sliding block. A handcart cavity into which a circuit breaker handcart is inserted is formed in the cabinet body, the bottom of the handcart cavity is fixedly provided with a slide way matched with the limiting slide block, and the two sides of the bottom of the slide way are concave inwards to form limiting slide grooves matched with the limiting convex blocks; and a limiting insertion hole matched with the positioning pin is formed in the handcart cavity. According to the utility model, the forward inclination and left-right offset of the circuit breaker handcart caused by the stress problem when the moving contact and the static contact of the handcart are contacted can be inhibited, so that the conditions of climbing of the handcart and poor matching concentricity of the moving contact and the static contact are eliminated.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to an indoor vacuum circuit breaker with a positioning pin. Background Art

[0002] The front center trolley is rotated clockwise into the working position through the push screw in the middle of the chassis to make the moving and static contacts engage and connect, and is rotated counterclockwise through the push screw in the middle of the chassis to separate the moving and static contacts. During the pushing process of the circuit breaker trolley, it moves on the rollers of the chassis.

[0003] However, when the circuit breaker trolley is swung out, the chassis trolley has a backward pulling force, and the plum blossom contact and the static contact have a forward friction force when they cooperate, and the two forces are not in the same horizontal plane. Due to the 0.7mm gap between the chassis trolley roller and the shell trolley room guide rail, the circuit breaker frame body has upward activity space. At the moment when the circuit breaker plum blossom contact and the static contact are separated, the circuit breaker frame falls back due to its own gravity, causing the chassis trolley and the guide rail to hit the sound, and the vibration causes the valve plate and the valve mechanism to resonate and make abnormal noises; since the chassis is the center and a single screw drives the trolley to push and push out, it is difficult to ensure the force balance when the left and right drive plates are in contact with the curtain plate. During the trolley's pushing and pushing operation, it is easy to tilt left and right, reducing the concentricity of the moving and static contacts. Figure 1 shown. Utility Model Content

[0004] In order to solve the above technical problems, the utility model proposes an indoor vacuum circuit breaker with a positioning pin.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] An indoor vacuum circuit breaker with a locating pin comprises a cabinet and a circuit breaker trolley; a locating pin is fixed to the front end of the bottom plate of the circuit breaker trolley; a limit slider is fixed to the rear position of the bottom of the bottom plate, and limit bumps are raised on both sides of the bottom of the limit slider; a trolley cavity for inserting the circuit breaker trolley is formed in the cabinet, a slideway that cooperates with the limit slider is fixedly installed at the bottom of the trolley cavity, and both sides of the bottom of the slideway are concave to form a limit slide groove that cooperates with the limit bumps; a limit socket that cooperates with the locating pin is formed inside the trolley cavity.

[0007] As a further improvement, positioning pins are fixed on both the left and right sides of the front end of the circuit breaker trolley.

[0008] As a further improvement, limit sliders are fixed on both left and right sides of the rear position of the bottom of the circuit breaker trolley.

[0009] As a further improvement, the limit slider is located in the position range of 2 / 3-3 / 4 of the rear end of the circuit breaker trolley from the front box.

[0010] As a further improvement, the limiting slider and the limiting protrusion form an inverted T-shaped structure or a dovetail structure as a whole; the slideway and the limiting slide groove are an inverted T-shaped groove or a dovetail groove as a whole.

[0011] As a further improvement, the front end of the positioning pin is tapered.

[0012] As a further improvement, the positioning pin is threadedly connected to the base plate, and notches are formed on both sides of the middle of the positioning pin.

[0013] As a further improvement, two induction blocks are installed on the circuit breaker trolley, and two proximity switches corresponding to the induction blocks are installed in the trolley cavity.

[0014] The beneficial effects of the present invention are:

[0015] 1. Suppress the forward tilt and left and right deviation of the circuit breaker trolley due to force problems when the trolley's moving and static contacts come into contact, thereby eliminating the trolley climbing and poor concentricity of the moving and static contacts.

[0016] 2. Ensure that the circuit breaker trolley is pushed into place through dual proximity switches, and prevent the problem of uncertainty about whether the trolley is out of place or the proximity switch is damaged after a single proximity switch is inaccurately detected or damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0018] Figure 1 The force state diagram of the existing trolley when it is pulled out;

[0019] Figure 2 A schematic diagram of the overall structure of the utility model;

[0020] Figure 3 Schematic diagram of the bottom structure of the base plate;

[0021] Figure 4 Schematic diagram of the side structure of the base plate;

[0022] Figure 5 Schematic diagram of the slide structure. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and examples. Specific implementation method 1

[0025] The L-shaped folding structure, a cell packaging structure of the present invention, will be described in detail below with reference to the accompanying drawings.

[0026] like Figure 2-5The indoor vacuum circuit breaker with a positioning pin shown in the figure includes a cabinet 1, a trolley cavity 11, a circuit breaker trolley 2, a bottom plate 21, a positioning pin 3, a limiting slider 4, a limiting protrusion 41, a slide 5, a limiting slide groove 51, a sensor block 6, and a proximity switch 7.

[0027] Among them, positioning pins 3 are fixed on both sides of the front end of the bottom plate 21 of the circuit breaker trolley 2, and limiting sliders 4 are fixed on both sides of the bottom; limiting protrusions 41 are raised at both ends of the bottom of the limiting slider 4 to form an inverted T-shaped structure. The corresponding bottom of the trolley cavity 11 is fixed with a slide 5, and the two sides of the bottom of the slide 5 are concave to form a limiting slide groove 51, so that its cross-section forms an inverted T-shaped structure. When the circuit breaker trolley 2 is pushed into the trolley cavity 11, the limiting protrusions 41 and the limiting protrusions 41 are inserted into the slide 5 and the limiting slide groove 51. Furthermore, the rear end of the slide 5 forms a trumpet-shaped entrance for easy guidance. When the circuit breaker trolley 2 is pushed into place, the positioning pin 3 is inserted into the corresponding limiting socket set in the trolley cavity 11.

[0028] When the circuit breaker trolley 2 needs to be pulled out, the chassis screw rod is pulled backward, and the circuit breaker trolley 2 is subjected to the pull of the plum blossom contact and the static contact from above, and the pull of the positioning pin 3 from below, so that the upper and lower forces are relatively balanced and it is not easy to turn over. At the same time, the cooperation between the limit protrusion 41 and the limit slide 51 further prevents the tendency of turning over, so that when the trolley is pulled out, there will be no sound of collision between the chassis and the guide rail, and no resonance and abnormal sound of the valve plate and the valve mechanism caused by vibration. Among them, the limit slider 4 is located in the position range of 2 / 3-3 / 4 of the rear end of the circuit breaker trolley 2 from the front box.

[0029] The front end of the positioning pin 3 is tapered, and the positioning pin 3 is detachably connected to the base plate 21 through a thread. Notches 31 are formed on both sides of the middle of the positioning pin 3 to facilitate the insertion of a wrench to tighten or loosen it.

[0030] In order to prevent a single proximity switch from being accidentally touched or being damaged and unable to confirm whether the trolley is not pushed into place or the proximity switch is faulty, two sensor blocks 6 are installed on the circuit breaker trolley 2, and two proximity switches 7 corresponding to the sensor blocks 6 are installed in the trolley cavity 11.

[0031] When pushing the trolley in this way, the trolley can only be confirmed to be pushed into place when both proximity switches have signals. If only one proximity switch has a signal, it means that the proximity switch has been accidentally touched or the proximity switch without a signal is faulty. At this time, push the trolley again until two signals appear. If there is always only one signal, it means that the proximity switch without a signal is faulty.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. An indoor vacuum circuit breaker with a positioning pin, comprising a cabinet (1) and a circuit breaker trolley (2); characterized in that: A positioning pin (3) is fixed to the front end of the bottom plate (21) of the circuit breaker trolley (2); a limiting slider (4) is fixed to the rear position of the bottom of the bottom plate (21), and limiting bumps (41) are raised on both sides of the bottom of the limiting slider (4); a trolley cavity (11) for inserting the circuit breaker trolley (2) is formed in the cabinet (1), a slideway (5) that cooperates with the limiting slider (4) is fixedly installed at the bottom of the trolley cavity (11), and both sides of the bottom of the slideway (5) are concave to form limiting slots (51) that cooperate with the limiting bumps (41); a limiting socket that cooperates with the positioning pin (3) is formed inside the trolley cavity (11).

2. The indoor vacuum circuit breaker with a positioning pin according to claim 1, characterized in that: Positioning pins (3) are fixed on both left and right sides of the front end of the circuit breaker trolley (2).

3. The indoor vacuum circuit breaker with a positioning pin according to claim 1, characterized in that: Limiting slide blocks (4) are fixed on both left and right sides of the rear portion of the bottom of the circuit breaker trolley (2).

4. The indoor vacuum circuit breaker with a positioning pin according to claim 3, characterized in that: The limiting slide block (4) is located within a position range of 2 / 3-3 / 4 from the front end to the rear end of the circuit breaker trolley (2).

5. The indoor vacuum circuit breaker with a positioning pin according to claim 1, characterized in that: The limiting sliding block (4) and the limiting protrusion (41) are integrally formed into an inverted T-shaped structure or a dovetail structure; the slideway (5) and the limiting sliding groove (51) are integrally formed into an inverted T-shaped groove or a dovetail groove.

6. The indoor vacuum circuit breaker with a positioning pin according to claim 1, wherein: The front end of the positioning pin (3) is tapered.

7. The indoor vacuum circuit breaker with a positioning pin according to claim 1, wherein: The positioning pin (3) is threadedly connected to the bottom plate (21), and notches (31) are formed on both sides of the middle of the positioning pin (3).

8. The indoor vacuum circuit breaker with a positioning pin according to any one of claims 1 to 7, characterized in that: Two induction blocks (6) are installed on the circuit breaker trolley (2), and two proximity switches (7) corresponding to the induction blocks (6) are installed on the trolley cavity (11).

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