A high-voltage switchgear with a shutter device

Abstract

The utility model belongs to high -voltage distribution cabinet valve mechanism technical field, concretely relates to a valve device of high -voltage distribution cabinet, including high -voltage distribution cabinet body and the static contact of installing in high -voltage distribution cabinet body inner wall, the inner wall of high -voltage distribution cabinet body is connected with the upper guide plate, one side of upper guide plate is connected with the upper movable baffle, the utility model discloses when taking out in high -voltage distribution cabinet body in circuit breaker, personnel pull the pull rod on the surface of locking block through the tool at this time, the linkage block is moved in the inside of fixed plate at this time, the guide block of upper movable baffle and lower movable baffle two ends is along fixed plate sliding at this time, the upper movable baffle and lower movable baffle limit the shelter of static contact at this time, when the upper movable baffle and lower movable baffle completely shelter static contact at this time, the plugboard is embedded in the locking slot of fixed plate one side place at this time, thereby the stability of convenient movable upper movable baffle and lower movable baffle is improved, and the effect of static contact protection is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of high-voltage distribution cabinet door mechanism, specifically relating to a door device for a high-voltage distribution cabinet. Background Technology

[0002] The valve mechanism of a high-voltage switchgear is a crucial component of metal-enclosed switchgear and control equipment. It mainly consists of a valve plate and a drive mechanism, and is used in air-insulated withdrawable switchgear. The valve has two switchable positions: one position allows the contacts of removable components or the moving contacts of a disconnecting switch to engage with the fixed contacts; the other position becomes part of the housing or partition, shielding the fixed contacts and preventing accidental contact with high-voltage live parts.

[0003] Taking a common crank-arm valve mechanism as an example: When the trolley moves from the test position to the working position, the trolley wheels press down on the crank arm, causing it to rotate clockwise around the fulcrum. Driven by this rotation, the lower pull plate moves downwards, and the lower valve rotates counterclockwise around the fulcrum. Simultaneously, the upper pull plate is also pulled downwards by the lower pull plate, causing the upper valve to rotate clockwise around the fulcrum. The upper and lower valves gradually open to their final positions.

[0004] Specifically, in the daily operation and maintenance of high-voltage switchgear, the reliability of the valve mechanism, as a core protective component ensuring operator safety and isolating energized areas, is crucial. Currently, the crank-arm valve mechanism has become the mainstream choice for air-insulated withdrawable switchgear due to its simple structure and low manufacturing cost. This mechanism uses mechanical transmission principles, utilizing the contact between the wheels and the crank arm during the trolley's movement to drive the upper and lower valve plates to open and close. However, this traditional design, after long-term, high-frequency use, has revealed significant structural defects. From a mechanical perspective, the crank arm, as the force transmission hub, must withstand the alternating load generated by the downward pressure of the wheels each time the trolley is pushed forward or withdrawn. Simultaneously, it forms a multi-axis hinged structure with components such as the pull rod and pull plate, leading to continuous friction and wear between the pin and the hole wall, resulting in increased transmission clearance. This accumulated clearance not only reduces the synchronicity of valve opening / closing, causing blind spots in the protection during contact exposure, but may also cause valve jamming malfunctions. Utility Model Content

[0005] The purpose of this invention is to provide a valve device for a high-voltage switchgear, aiming to solve the significant structural defects exposed in traditional designs after long-term, high-frequency use. From a mechanical principle perspective, the crank arm, as a force transmission hub, must withstand the alternating load generated by the downward pressure of the wheels each time the handcart is pushed forward or retracted. Simultaneously, it forms a multi-axis hinged structure with components such as the pull rod and pull plate, resulting in continuous friction and wear between the pin and the hole wall, thus increasing the transmission clearance. This accumulated clearance not only reduces the synchronicity of the valve's opening / closing, causing a blind spot during contact exposure, but may also lead to valve jamming malfunctions.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a door device for a high-voltage distribution cabinet, comprising a high-voltage distribution cabinet body and an electrostatic contact installed on the inner wall of the high-voltage distribution cabinet body, wherein an upper guide plate is connected to the inner wall of the high-voltage distribution cabinet body, an upper movable baffle is connected to one side of the upper guide plate, a lower guide plate is connected to the bottom end of the upper guide plate, a lower movable baffle is connected to one side of the lower guide plate, guide blocks are connected to both ends of the upper movable baffle, and a linkage block is connected to one side of the guide block;

[0007] A fixing plate is connected to the surface of the linkage block. A limit post is connected to the inner wall of the opening of the fixing plate. A sliding block is connected to one side of the linkage block. An adjusting plate is connected to the bottom outer side of the sliding block. A locking block is connected to the surface of the sliding block near the adjusting plate. A pull rod is movably connected to the surface of the locking block. A linkage plate is connected to one end of the pull rod. A linkage spring is connected to one side of the linkage plate. A plug plate is connected to the other side of the linkage plate.

[0008] To improve the stability of movement, the upper movable baffle and the guide block are preferably integrated into a single structure, and the upper movable baffle and the upper guide plate are connected in a sliding manner through the guide block.

[0009] In order to ensure that the upper movable baffle can move, as a preferred embodiment of the door device of the high voltage distribution cabinet of this utility model, the surface size of the linkage block is adapted to the inner wall size of the fixed plate, and the limiting post passes through the opening on the surface of the linkage block and is connected to the inner wall of the opening of the upper guide plate.

[0010] To facilitate the positioning and protection of the electrostatic contact, the preferred door device of the high-voltage distribution cabinet of this utility model has a surface size larger than that of the electrostatic contact, and both the upper and lower movable baffles are made of PVC material.

[0011] To facilitate the protection of electrostatic contacts, the locking block of the high-voltage distribution cabinet of this utility model is preferably provided in two sets, and the two sets of locking blocks are symmetrically distributed about the center line of the upper movable baffle.

[0012] To facilitate the vertical adjustment of the upper movable baffle, in a preferred embodiment of the high-voltage distribution cabinet door device of this utility model, one end of the linkage spring relative to the linkage plate is connected to the inner wall of the locking block, and the linkage spring and the linkage plate form an elastic telescopic structure.

[0013] To facilitate the stable installation of the upper movable baffle, as a preferred embodiment of the door device of the high-voltage distribution cabinet of this utility model, the fixed plate has a locking slot on the side near the insert plate. After the insert plate passes through the locking block and the sliding block, it forms a fitting structure with the locking slot on the side of the fixed plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention allows for the removal of the circuit breaker from the high-voltage distribution cabinet. When the circuit breaker is removed, a person uses a tool to pull the lever on the surface of the locking block. This moves the linkage block inside the fixed plate, causing the guide blocks at both ends of the upper and lower movable baffles to slide along the fixed plate. The upper and lower movable baffles then limit and block the electrostatic contacts. When the upper and lower movable baffles completely block the electrostatic contacts, the insert plate engages with the locking slot on one side of the fixed plate. This improves the stability of the movement of the upper and lower movable baffles and enhances the protection of the electrostatic contacts. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall assembly structure of the valve mechanism of this utility model.

[0018] Figure 2 This is a schematic diagram of the installation structure of the upper movable baffle of this utility model.

[0019] Figure 3 This is a schematic diagram of the locking block connection structure of this utility model.

[0020] Figure 4 This is an exploded view of the upper movable baffle of this utility model.

[0021] Figure 5 This is a schematic diagram of the linkage plate connection structure of this utility model.

[0022] In the diagram: 1. High-voltage distribution cabinet; 101. Fixing plate; 2. Static contact; 3. Upper guide plate; 4. Upper movable baffle; 5. Lower guide plate; 6. Lower movable baffle; 7. Guide block; 8. Linkage block; 9. Limiting post; 10. Sliding block; 11. Adjusting plate; 12. Locking block; 13. Pull rod; 14. Linkage plate; 15. Linkage spring; 16. Insert plate; 17. Locking slot. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 The present invention provides the following technical solution: a door device for a high-voltage distribution cabinet, comprising a high-voltage distribution cabinet body 1 and an electrostatic contact 2 installed on the inner wall of the high-voltage distribution cabinet body 1, an upper guide plate 3 connected to the inner wall of the high-voltage distribution cabinet body 1, an upper movable baffle 4 connected to one side of the upper guide plate 3, a lower guide plate 5 connected to the bottom end of the upper guide plate 3, a lower movable baffle 6 connected to one side of the lower guide plate 5, guide blocks 7 connected to both ends of the upper movable baffle 4, and a linkage block 8 connected to one side of the guide block 7;

[0025] A fixing plate 101 is connected to the surface of the linkage block 8. A limit post 9 is connected to the inner wall of the opening of the fixing plate 101. A sliding block 10 is connected to one side of the linkage block 8. An adjusting plate 11 is connected to the bottom outer side of the sliding block 10. A locking block 12 is connected to the surface of the sliding block 10 near the adjusting plate 11. A pull rod 13 is movably connected to the surface of the locking block 12. A linkage plate 14 is connected to one end of the pull rod 13. A linkage spring 15 is connected to one side of the linkage plate 14. A plug plate 16 is connected to the other side of the linkage plate 14.

[0026] Preferably, the upper movable baffle 4 and the guide block 7 are an integral structure, and the upper movable baffle 4 and the upper guide plate 3 are connected by the guide block 7 to form a sliding connection structure. In actual use, the stability of the movement of the upper movable baffle 4 is ensured by sliding the guide block 7 at one end of the upper movable baffle 4 along the opening on one side of the upper guide plate 3.

[0027] Preferably, the surface dimensions of the linkage block 8 are adapted to the inner wall dimensions of the fixed plate 101, and the limiting post 9 penetrates the opening on the surface of the linkage block 8 and connects to the inner wall of the opening of the upper guide plate 3. In actual use, when the linkage block 8 slides along the limiting post 9, the movement stability of the upper movable baffle 4 and the lower movable baffle 6 is ensured, while ensuring that the upper movable baffle 4 and the lower movable baffle 6 limit the protection of the electrostatic contact 2. At this time, the use of the linkage block 8 and the guide block 7 improves the movement effect of the upper movable baffle 4 and the lower movable baffle 6, and improves the convenience of movement.

[0028] Preferably, the surface dimensions of the upper movable baffle 4 and the lower movable baffle 6 are larger than the surface dimensions of the electrostatic contact 2, and both the upper movable baffle 4 and the lower movable baffle 6 are made of PVC. In practical use, the use of the upper movable baffle 4 and the lower movable baffle 6 facilitates the protection of the electrostatic contact 2.

[0029] Preferably, two sets of locking blocks 12 are provided, and the two sets of locking blocks 12 are symmetrically distributed about the midline of the upper movable baffle 4. In actual use, the locking blocks 12 facilitate the fixing of the moved upper movable baffle 4 and lower movable baffle 6, thereby facilitating the protection of the electrostatic contact 2.

[0030] Preferably, one end of the linkage spring 15 relative to the linkage plate 14 is connected to the inner wall of the locking block 12, and the linkage spring 15 and the linkage plate 14 form an elastic telescopic structure. In actual use, when the pull rod 13 is pulled, the linkage plate 14 is driven to squeeze the linkage spring 15, which facilitates the adjustment of the upper movable baffle 4 and the lower movable baffle 6.

[0031] Preferably, a locking slot 17 is provided on the side of the fixed plate 101 near the insert plate 16. After the insert plate 16 passes through the locking block 12 and the sliding block 10, it forms a fitting structure with the locking slot 17 on one side of the fixed plate 101. In actual use, by sliding the sliding block 10 on one side of the fixed plate 101, the upper movable baffle 4 and the lower movable baffle 6 can be adjusted synchronously. Then, under the rebound force of the linkage spring 15, the insert plate 16 is driven to fit into the locking slot 17, thereby facilitating the stable installation of the upper movable baffle 4 and the lower movable baffle 6.

[0032] The working principle of this utility model in specific use is as follows: First, when the circuit breaker is removed from the high-voltage distribution cabinet 1, the personnel use tools to pull the pull rod 13 on the surface of the locking block 12. At this time, the linkage block 8 moves inside the fixed plate 101, which drives the guide blocks 7 at both ends of the upper movable baffle 4 and the lower movable baffle 6 to slide along the fixed plate 101. At this time, the linkage block 8 slides along the limiting post 9. At this time, the upper movable baffle 4 and the lower movable baffle 6 limit and block the electrostatic contact 2. When the upper movable baffle 4 and the lower movable baffle 6 completely block the electrostatic contact 2, the linkage spring 15 rebounds and drives the insert plate 16 to engage with the locking slot 17 on one side of the fixed plate 101. This facilitates the stability of the movement of the upper movable baffle 4 and the lower movable baffle 6 and improves the protection effect of the electrostatic contact 2.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A valve device for a high-voltage distribution cabinet, comprising a high-voltage distribution cabinet body (1) and an electrostatic contact (2) installed on the inner wall of the high-voltage distribution cabinet body (1), characterized in that: The inner wall of the high-voltage distribution cabinet (1) is connected to an upper guide plate (3), one side of the upper guide plate (3) is connected to an upper movable baffle (4), the bottom end of the upper guide plate (3) is connected to a lower guide plate (5), one side of the lower guide plate (5) is connected to a lower movable baffle (6), both ends of the upper movable baffle (4) are connected to guide blocks (7), and one side of the guide block (7) is connected to a linkage block (8). A fixing plate (101) is connected to the surface of the linkage block (8). A limit post (9) is connected to the inner wall of the opening of the fixing plate (101). A sliding block (10) is connected to one side of the linkage block (8). An adjusting plate (11) is connected to the bottom outer side of the sliding block (10). A locking block (12) is connected to the surface of the sliding block (10) near the adjusting plate (11). A pull rod (13) is movably connected to the surface of the locking block (12). A linkage plate (14) is connected to one end of the pull rod (13). A linkage spring (15) is connected to one side of the linkage plate (14). A plug plate (16) is connected to the other side of the linkage plate (14).

2. The valve device of a high-voltage distribution cabinet according to claim 1, characterized in that: The upper movable baffle (4) and the guide block (7) are an integral structure, and the upper movable baffle (4) and the upper guide plate (3) form a sliding connection structure through the guide block (7).

3. The door device of a high-voltage distribution cabinet according to claim 1, characterized in that: The surface dimensions of the linkage block (8) are adapted to the inner wall dimensions of the fixing plate (101), and the limiting post (9) penetrates the opening on the surface of the linkage block (8) and is connected to the inner wall of the opening of the upper guide plate (3).

4. The door device of a high-voltage distribution cabinet according to claim 1, characterized in that: The surface dimensions of the upper movable baffle (4) and the lower movable baffle (6) are larger than the surface dimensions of the electrostatic contact (2), and both the upper movable baffle (4) and the lower movable baffle (6) are made of PVC.

5. The door device of a high-voltage distribution cabinet according to claim 1, characterized in that: The locking blocks (12) are provided in two sets, and the two sets of locking blocks (12) are symmetrically distributed about the midline of the upper movable baffle (4).

6. The valve device of a high-voltage distribution cabinet according to claim 1, characterized in that: The linkage spring (15) is connected to the inner wall of the locking block (12) at one end relative to the linkage plate (14), and the linkage spring (15) and the linkage plate (14) form an elastic telescopic structure.

7. The door device of a high-voltage distribution cabinet according to claim 1, characterized in that: The fixing plate (101) has a locking slot (17) on the side near the insert plate (16). After the insert plate (16) passes through the locking block (12) and the sliding block (10), it forms a fitting structure with the locking slot (17) on the side of the fixing plate (101).

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