High-protection shifting fork operating mechanism for explosion-proof box panel

Abstract

The utility model discloses a high-protection explosion-proof box panel shifting fork operating mechanism, which relates to the explosion-proof electrical field and comprises a box body panel, a miniature circuit breaker, a copper sleeve, a shifting fork rotating shaft, a shifting fork pulling handle and limiting units, and the limiting units are clamped on the shifting fork rotating shaft and located at two ends of the copper sleeve. And the axial movement of the shifting fork rotating shaft in the copper sleeve is limited. The shifting fork rotating shaft is fixedly clamped to the specific position of the copper sleeve through the arranged limiting units, and the two limiting units make close contact with the two ends of the copper sleeve respectively, so that the shifting fork rotating shaft cannot axially move under blocking of the two limiting units, axial position deviation of the shifting fork rotating shaft during rotation is prevented, and the service life of the shifting fork rotating shaft is prolonged. Therefore, the opening and closing operation of the circuit breaker is ensured.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof electrical systems, and in particular to a highly protective explosion-proof box panel shift fork operating mechanism. Background Technology

[0002] In electrical circuits, circuit breakers are commonly used components, their function being to control the opening and closing of circuits. In industries prone to explosion, such as coal mining, paint and ink production, timber processing, shipbuilding and wastewater treatment, and oil and gas extraction, circuit breakers are often sealed in explosion-proof distribution boxes. The purpose of the explosion-proof distribution box is to prevent the circuit breaker from coming into contact with air and causing an explosion; it also provides excellent protection for the circuit breaker and extends its service life. However, in actual use, when it is necessary to control the opening and closing of the circuit breaker, the explosion-proof distribution box must be opened. The drawback of this operation is that opening the explosion-proof distribution box, in a relatively dangerous explosive environment, could cause an explosion if the circuit breaker generates sparks, posing a safety hazard. Moreover, opening the explosion-proof distribution box exposes the circuit breaker, allowing it to come into contact with air, which affects the service life of the explosion-proof switch.

[0003] Existing technology, such as the one disclosed in CN203774102U, is an operating mechanism for an explosion-proof distribution box circuit breaker, which includes a rotating shaft, a dial plate, and a dial shaft. One side of the dial plate is connected to one end of the rotating shaft, and the other side of the dial plate is connected to the dial shaft.

[0004] The existing publication number CN209001408 U discloses a panel mounting mechanism for a miniature circuit breaker in an explosion-proof distribution box, which includes a mounting panel, an operating handle, a rotating shaft sleeve, a drive fork frame, and a rotating shaft.

[0005] In existing technologies, the dial shaft is generally directly connected to the housing panel via a sleeve or tube. Under long-term rotational use, the dial shaft may move along its own axis, causing the dial position to shift, which in turn affects the operation of the circuit breaker. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a highly protective explosion-proof box panel shift fork operating mechanism to solve the problems existing in the background art.

[0007] This utility model provides the following technical solution: a high-protection explosion-proof box panel toggle fork operating mechanism, comprising:

[0008] A copper sleeve is fitted onto the housing panel and is interference-fitted with the housing panel.

[0009] The shift fork pivot is rotatably mounted on the copper sleeve and placed on the housing panel through the copper sleeve;

[0010] The shift fork handle is connected to one end of the shift fork shaft and is located inside the explosion-proof box, corresponding to the handle of the miniature circuit breaker.

[0011] A limiting unit is disposed on the shift fork shaft and located at both ends of the copper sleeve, and is used to limit the axial movement of the shift fork shaft within the copper sleeve.

[0012] Beneficial effects: The set limit unit fixes the shift fork shaft in a specific position on the copper sleeve, and the two limit units are in close contact with the two ends of the copper sleeve, so that the shift fork shaft cannot move axially under the obstruction of the two limit units, preventing the shift fork shaft from shifting position during rotation, thereby ensuring the operation of the shift fork lever for opening and closing the circuit breaker.

[0013] Preferably, the limiting unit is a snap ring.

[0014] Preferably, there are two retaining rings, which are respectively engaged with the fork shaft and located at both ends of the copper sleeve.

[0015] Preferably, it also includes a handle, which is detachably connected to the other end of the shift fork shaft.

[0016] Preferably, the copper sleeve has an explosion-proof mating surface between itself and the housing panel and the shift fork shaft.

[0017] The aforementioned technical means are used to prevent the spread of explosion flames or explosion products inside the enclosure to the external environment.

[0018] Preferably, it also includes a sealing ring placed between the copper sleeve and the shift fork shaft.

[0019] By employing the aforementioned technical means, the sealing between the copper sleeve and the shift fork shaft is increased, thereby improving the explosion-proof effect.

[0020] Preferably, the sealing ring has an "O" shaped structure. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the shift fork operating mechanism of this utility model.

[0022] The attached diagram is labeled as follows: 1. Shift fork handle; 2. Shift fork pivot; 3. Snap ring; 4. Copper sleeve; 5. Shift handle; 6. Sealing ring; 7. Explosion-proof mating surface; 8. Enclosure panel; 9. Miniature circuit breaker. Detailed Implementation

[0023] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0024] This invention provides a highly protective explosion-proof box panel lever fork operating mechanism.

[0025] Example 1: A high-protection explosion-proof box panel shift fork operating mechanism, such as... Figure 1 As shown, it includes a shift fork handle 1, a shift fork pivot 2, a limit unit, a copper sleeve 4, a shift handle 5, and a sealing ring 6.

[0026] A copper sleeve 4 is horizontally inserted into the enclosure panel 8 of the explosion-proof box and is interference-fitted with the enclosure panel 8. The shift fork shaft 2 is rotatably mounted on the copper sleeve 4 and rests on the enclosure panel 8 through the copper sleeve 4. A miniature circuit breaker 9 is also installed inside the explosion-proof box. One end of the shift fork shaft 2 extends into the explosion-proof box and is located at the handle position of the miniature circuit breaker 9. The shift fork lever 1 is connected to one end of the shift fork shaft 2 and is located inside the explosion-proof box corresponding to the handle of the miniature circuit breaker 9. The lever handle 5 is detachably connected to the other end of the shift fork shaft 2.

[0027] The limiting unit is engaged with the shift fork shaft 2 and located at both ends of the copper sleeve 4 to restrict the axial movement of the shift fork shaft 2 within the copper sleeve 4. The limiting unit here is a retaining spring, and there are two retaining springs 3, which are engaged with the shift fork shaft 2 and located at both ends of the copper sleeve 4.

[0028] The fork shaft 2 is locked in a specific position on the copper sleeve 4 by the setting limit unit, and the two limit units are in close contact with the two ends of the copper sleeve 4 respectively, so that the fork shaft 2 cannot move axially under the obstruction of the two limit units, preventing the fork shaft 2 from shifting position when rotating, thereby ensuring the operation of the fork lever for opening and closing the circuit breaker.

[0029] In this embodiment, an explosion-proof joint surface 7 is formed between the copper sleeve 4 and the box panel 8, and an explosion-proof joint surface 7 is also formed between the copper sleeve 4 and the shift fork shaft 2, preventing the explosion flame or explosion products inside the box from spreading to the external environment of the box.

[0030] In this embodiment, the sealing ring 6 is placed between the copper sleeve 4 and the shift fork shaft 2, and the sealing ring 6 has an "O" shaped structure, which increases the sealing between the copper sleeve 4 and the shift fork shaft 2, thereby improving the explosion-proof effect.

[0031] Usage process: By rotating the lever 5, the lever shaft 2 is driven to rotate, which in turn drives the lever handle 1 to move up and down, thereby causing the lever handle 1 to drive the circuit breaker handle to move, so as to control the circuit breaker to close. After the circuit breaker trips, the circuit breaker handle drives the lever handle 1 to move, so that the lever 5 is reset.

[0032] Example 2: A high-protection explosion-proof box panel shift fork operating mechanism includes a shift fork handle 1, a shift fork shaft 2, a limiting unit, a copper sleeve 4, a shift handle 5, and a sealing ring 6. The main difference from Example 1 is that the limiting unit here is a fixing ring. The fixing ring is snapped or welded to the shift fork shaft 2 and located at both ends of the copper sleeve 4, used to restrict the axial movement of the shift fork shaft 2 within the copper sleeve 4.

[0033] Example 3: A high-protection explosion-proof box panel shift fork operating mechanism, including a shift fork handle 1, a shift fork shaft 2, a limiting unit, a copper sleeve 4, a shift handle 5, and a sealing ring 6. The main difference from Example 1 is that the limiting unit here is a retaining ring, which is snapped or welded to the shift fork shaft 2 and located at both ends of the copper sleeve 4, used to restrict the axial movement of the shift fork shaft 2 within the copper sleeve 4.

[0034] Example 4: A high-protection explosion-proof box panel shift fork operating mechanism, including a shift fork handle 1, a shift fork shaft 2, a limiting unit, a copper sleeve 4, a shift handle 5, and a sealing ring 6. The main difference from Example 1 is that the limiting unit here is a screw, threadedly connected to the shift fork shaft 2, with the nut protruding from the surface of the shaft 2 and located at both ends of the copper sleeve 4, used to restrict the axial movement of the shift fork shaft 2 within the copper sleeve 4.

[0035] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0036] The above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present utility model should be included in the protection scope recorded in the claims.

Claims

1. A high-guarded, explosion-proof, box panel shift fork operating mechanism characterized by, The utility model relates to a kind of microcircuit breaker handle, including: Copper bushing (4) is assembled on the box panel (8), and is on box panel (8) interference fit; Shifting fork pivot (2) is rotatably installed on the copper bushing (4), and is placed on the box panel (8) by copper bushing (4); Shifting fork handle (1) is connected to one end of the shifting fork pivot (2), and is located inside the explosion-proof box and the handle of microcircuit breaker (9) correspondingly; Limiting unit is arranged on the shifting fork pivot (2), and is located at both ends of the copper bushing (4), for limiting the axial movement of shifting fork pivot (2) in copper bushing (4).

2. A high-guarded, explosion-proof, box panel shift fork operating mechanism as defined in claim 1, characterized in that: The limiting unit is a snap spring (3).

3. A high-guarded, explosion-proof, box panel shift fork operating mechanism as defined in claim 2, wherein: The number of the snap spring (3) is two, and the two snap springs (3) are respectively clamped on the shifting fork pivot (2) and located at both ends of the copper bushing (4).

4. A high-guarded, explosion-proof, box panel shift fork operating mechanism according to any one of claims 1-3, characterized in that: It also includes a handle (5), which is detachably connected to the other end of the shifting fork pivot (2).

5. A high containment explosion-proof box panel dial fork operating mechanism as defined in claim 4 wherein: The copper bushing (4) forms an explosion-proof joint surface (7) with the box panel (8) and the shifting fork pivot (2).

6. A high containment explosion-proof box panel dial fork operating mechanism as claimed in claim 5, characterized in that: It also includes a sealing ring (6) between the copper bushing (4) and the shifting fork pivot (2).

7. A high containment explosion-proof box panel dial fork operating mechanism as defined in claim 6 wherein: The sealing ring (6) is of "O" structure.

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