An explosion-proof high-voltage vacuum switch linkage device with a built-in locking mechanism

Abstract

The application relates to a linkage device of an explosion-proof high-voltage vacuum switch with a built-in locking mechanism, which comprises an explosion-proof cabinet and a circuit breaker core, the explosion-proof cabinet is internally provided with a static contact, the circuit breaker core is slidably arranged in the explosion-proof cabinet, the circuit breaker core is provided with a moving contact opposite to the static contact, the linkage device comprises a driving rod, a main rod, a sliding rod and a rotating disc, the explosion-proof cabinet is provided with a door cabinet plate for opening the explosion-proof cabinet and a fixed plate adjacent to the door cabinet plate, the main rod and the sliding rod are arranged in the explosion-proof cabinet and are parallel to the door cabinet plate, the driving rod is arranged on the explosion-proof cabinet and is perpendicular to the door cabinet plate, the driving rod drives the main rod to rotate, the driving rod has a switch output end for driving the circuit breaker core to slide and forming the contact between the static contact and the moving contact, the rotating disc is arranged on the main rod and synchronously rotates with the main rod, the sliding rod is arranged in parallel with the main rod and abuts against the rotating disc, the rotating disc is provided with a protrusion and forms the sliding of the sliding rod, and the other side of the sliding rod relative to the rotating disc is provided with a cabinet door locking end, the cabinet door locking end forms the fixation between the door cabinet plate and the fixed plate.

Description

Technical Field

[0001] This invention relates to an explosion-proof high-voltage vacuum switch linkage device, specifically to an explosion-proof high-voltage vacuum switch linkage device with a built-in locking mechanism. Background Technology

[0002] High-voltage vacuum switches, as key power control equipment, are widely used in industrial fields such as mining, petroleum, and chemical industries where there are explosive hazardous environments. Their core function is to safely connect, carry, and disconnect circuit current. To ensure the explosion-proof performance of the switch body and the safety of operators, they are usually installed in specially designed explosion-proof switch cabinets.

[0003] In existing technologies, the operation of high-voltage vacuum switches and the opening and closing of the cabinet doors are usually two independent systems. Operators drive the switch through external mechanisms, while the cabinet doors are locked by independent mechanical locks. This separate design poses significant safety hazards: after closing the switch, operators may fail to lock the cabinet door due to negligence, leaving the cabinet door open while the switch is energized. This creates conditions for accidental contact or unauthorized access, which can easily lead to serious electric shock accidents. In addition, during equipment maintenance, current safety measures mostly rely on procedures such as "tag and lock". If personnel do not strictly follow these procedures or the cabinet doors are not effectively locked, there is a risk of the equipment being accidentally energized during maintenance, which could be extremely dangerous.

[0004] To address this issue, the industry has attempted some improvements, such as using electrical interlocks by installing microswitches on the cabinet door to cut off the operating power when the door is opened. However, the reliability of such solutions highly depends on the integrity of the control circuit itself, and there is a risk of failure due to malicious or unintentional bypassing. Another common approach is to set up mechanical warning signs, but this still relies on the self-discipline of personnel and cannot provide mandatory physical constraints. In summary, the existing technology lacks a rigid linkage device that can automatically and reliably physically lock the switch cabinet door while driving the switch to close. There is an urgent need for a design that ensures the cabinet door cannot be opened at all when the switch is energized, thereby fundamentally eliminating the possibility of personnel coming into contact with energized parts. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an explosion-proof high-voltage vacuum switch linkage device with a built-in locking mechanism.

[0006] To achieve the above objectives, the present invention provides the following technical solution: It includes an explosion-proof cabinet and a circuit breaker mechanism. A stationary contact is installed inside the explosion-proof cabinet. The circuit breaker mechanism is slidably installed inside the explosion-proof cabinet and has a moving contact opposite to the stationary contact. The system includes a drive rod, a main rod, a sliding rod, and a turntable. The explosion-proof cabinet has a door panel for opening the cabinet and a fixed plate adjacent to the door panel. The main rod and the sliding rod are installed inside the explosion-proof cabinet and parallel to the door panel. The drive rod is installed on the explosion-proof cabinet and perpendicular to the door panel. The drive rod drives the main rod to rotate. The drive rod has a switch output end for driving the circuit breaker mechanism to slide and forming contact between the stationary and moving contacts. The turntable is installed on the main rod and rotates synchronously with it. The sliding rod is parallel to the main rod and abuts against the turntable. The turntable has a protrusion that forms the sliding of the sliding rod. The other side of the sliding rod opposite the turntable has a cabinet door locking end, which fixes the door panel to the fixed plate.

[0007] By adopting the above technical solution, when the drive rod is rotated, the drive main rod rotates synchronously, and the turntable on the main rod rotates accordingly. The protrusion on the turntable pushes the sliding rod to slide in a direction parallel to the door panel. The door locking end of the sliding rod locks the door panel to the fixed plate. At the same time, the switch output end of the drive rod drives the circuit breaker mechanism to slide, so that the moving contact and the stationary contact come into contact or separate. This realizes the forced linkage between switch operation and door locking, ensuring that the door is automatically physically locked when the switch is closed. This fundamentally prevents the problem of the door not being locked due to operator negligence, eliminates the risk of accidental contact or unauthorized access to live parts, and improves explosion-proof safety.

[0008] The invention is further configured to include a worm gear, a worm portion on the drive rod located inside the explosion-proof cabinet, the worm gear being disposed on the main rod and driving the main rod to rotate, and the worm gear meshing with the worm portion to form the drive rod driving the main rod.

[0009] By adopting the above technical solution, when the drive rod rotates, the worm gear drives the worm wheel, thereby driving the main rod to rotate, and then driving the entire linkage mechanism; a worm gear transmission mechanism is introduced, which uses its self-locking characteristics to prevent the main rod from reversing, ensuring the stability of the cabinet door lock state after the switch is closed. Even if subjected to external vibration or misoperation, the lock will not be accidentally released, thus enhancing the reliability and safety of the device.

[0010] The present invention is further configured such that the drive rod has a drive end located outside the explosion-proof cabinet.

[0011] By adopting the above technical solution, operators can drive the entire linkage device directly from the external operating end without opening the cabinet door, realizing opening and closing operations and cabinet door locking; it simplifies the operation process, reduces the opportunity for operators to be exposed to dangerous environments, and avoids the safety hazards that may be introduced by frequent opening of the cabinet door, which complies with the safety specifications of explosion-proof equipment and improves the convenience of operation and overall safety.

[0012] The invention is further configured such that: the protrusions are arc-shaped and distributed along the outer periphery of the turntable, there are two protrusions, a smooth section is provided between the protrusions, the sliding rod abuts against the protrusions or the smooth section and constitutes the sliding of the sliding rod, and also includes a compression spring, the compression spring is provided on the sliding rod and drives the sliding rod to abut against the turntable.

[0013] By adopting the above technical solution, when the turntable rotates, the protrusion pushes the sliding rod to slide, while the smooth section allows the sliding rod to return to its original position under the action of the spring, ensuring that the sliding rod always keeps in contact with the turntable and achieves smooth reciprocating motion. Through the reasonable layout of the protrusion and smooth section and the pressure of the spring, the smoothness and reliability of the sliding rod's movement are guaranteed, avoiding jamming or dislocation, making the cabinet door locking action more precise and durable, and improving the mechanical stability of the linkage device.

[0014] The invention is further configured to include a lead screw and a sliding carriage. The lead screw is installed inside the explosion-proof cabinet and rotates synchronously with the switch output terminal. The sliding carriage is installed inside the explosion-proof cabinet. A slider is installed at the bottom of the sliding carriage and the slider meshes with the lead screw. The lead screw drives the sliding carriage. The circuit breaker mechanism is installed inside the sliding carriage.

[0015] By adopting the above technical solution, the switch output end of the drive rod drives the lead screw to rotate synchronously. The lead screw engages with the slider at the bottom of the sliding trolley, thereby driving the sliding trolley and the circuit breaker core on it to slide within the explosion-proof cabinet, completing the contact or separation of the contacts. The lead screw transmission converts the rotary motion into precise linear motion, ensuring the smooth and controllable movement of the circuit breaker core, making the connection between the moving and stationary contacts reliable, reducing the risk of arcing or poor contact. At the same time, the entire structure is compact and suitable for the limited space inside the explosion-proof cabinet, improving the accuracy and lifespan of the switch operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a plan view of the main rod, sliding rod, and related components of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the turntable of the present invention;

[0019] Figure 4 This is a schematic diagram of the main rod, sliding rod, and related components of the present invention.

[0020] In the diagram: 1. Explosion-proof cabinet; 11. Cabinet door panel; 12. Fixing plate; 2. Circuit breaker mechanism; 21. Stationary contact; 22. Moving contact; 3. Drive rod; 31. Switch output terminal; 32. Worm gear section; 33. Drive end; 4. Main rod; 41. Worm gear; 5. Sliding rod; 51. Cabinet door locking end; 6. Turntable; 61. Protrusion; 62. Smooth section; 7. Compression spring; 8. Lead screw; 9. Sliding carriage; 91. Slider. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] like Figure 1-4As shown, this invention discloses an explosion-proof high-voltage vacuum switch linkage device with a built-in locking mechanism, including an explosion-proof cabinet 1 and a circuit breaker mechanism 2. A stationary contact 21 is installed inside the explosion-proof cabinet 1. The circuit breaker mechanism 2 is slidably installed inside the explosion-proof cabinet 1 and has a moving contact 22 opposite to the stationary contact 21. The device includes a drive rod 3, a main rod 4, a sliding rod 5, and a turntable 6. The explosion-proof cabinet 1 has a door panel 11 for opening the cabinet 1 and adjacent to the door panel 11. The fixed plate 12, main rod 4, and sliding rod 5 are installed inside the explosion-proof cabinet 1 and are parallel to the door panel 11. The drive rod 3 is installed on the explosion-proof cabinet 1 and is perpendicular to the door panel 11. The drive rod 3 drives the main rod 4 to rotate. The drive rod 3 has a switch output terminal 31 for driving the circuit breaker core 2 to slide and forming contact between the stationary contact 21 and the moving contact 22. The turntable 6 is installed on the main rod 4 and rotates synchronously with the main rod 4. The sliding rod 5 is installed parallel to the main rod 4 and is parallel to the turntable. The turntable 6 has a protrusion 61 that forms the sliding mechanism of the sliding rod 5. The sliding rod 5 has a cabinet door locking end 51 on the other side of the turntable 6. The cabinet door locking end 51 fixes the cabinet door panel 11 to the fixed plate 12. When the drive rod 3 is rotated, the drive main rod 4 rotates synchronously, and the turntable 6 on the main rod 4 rotates accordingly. The protrusion 61 on the turntable 6 pushes the sliding rod 5 to slide in a direction parallel to the cabinet door panel 11. The cabinet door locking end 51 of the sliding rod 5 locks the cabinet door panel 11 to the fixed plate 12. At the same time, the switch output end 31 of the drive rod 3 drives the circuit breaker core 2 to slide, so that the moving contact 22 contacts or separates from the stationary contact 21. This realizes the forced linkage between the switch operation and the cabinet door locking, ensuring that the cabinet door is automatically physically locked when the switch is closed. This fundamentally prevents the problem of the cabinet door not being locked due to operator negligence, eliminates the risk of accidental contact or unauthorized access to live parts, and improves explosion-proof safety.

[0024] It also includes a worm gear 41. The drive rod 3 is provided with a worm part 32 and the worm part 32 is located inside the explosion-proof cabinet 1. The worm gear 41 is set on the main rod 4 and drives the main rod 4 to rotate. The worm gear 41 and the worm part 32 mesh together to form the drive rod 3 to drive the main rod 4. When the drive rod 3 rotates, the worm part 32 drives the worm gear 41, thereby driving the main rod 4 to rotate, and then driving the entire linkage mechanism. The worm gear 41 worm transmission mechanism is introduced, and its self-locking characteristic prevents the main rod 4 from reversing, ensuring the stability of the cabinet door lock state after the switch is closed. Even if it is subjected to external vibration or misoperation, the lock will not be accidentally released, which enhances the reliability and safety of the device.

[0025] The drive rod 3 has a drive end 33 located outside the explosion-proof cabinet 1. Operators can drive the entire linkage device directly from the outside by operating the drive end 33 without opening the cabinet door, realizing the opening and closing operation and cabinet door locking. This simplifies the operation process, reduces the opportunity for operators to be exposed to dangerous environments, and avoids the safety hazards that may be introduced by frequently opening the cabinet door. It complies with the safety specifications of explosion-proof equipment and improves the convenience of operation and overall safety.

[0026] The protrusions 61 are arc-shaped and distributed along the outer periphery of the turntable 6. There are two protrusions 61, and a smooth section 62 is provided between the protrusions 61. The sliding rod 5 abuts against the protrusions 61 or the smooth section 62 to form the sliding of the sliding rod 5. It also includes a compression spring 7, which is set on the sliding rod 5 and drives the sliding rod 5 to abut against the turntable 6. When the turntable 6 rotates, the protrusions 61 push the sliding rod 5 to slide, while the smooth section 62 allows the sliding rod 5 to return to its original position under the action of the spring, ensuring that the sliding rod 5 always keeps in contact with the turntable 6 and achieves smooth reciprocating motion. Through the reasonable layout of the protrusions 61 and the smooth section 62 and the compression of the spring, the smoothness and reliability of the movement of the sliding rod 5 are guaranteed, avoiding jamming or dislocation, making the cabinet door locking action more precise and durable, and improving the mechanical stability of the linkage device.

[0027] It also includes a lead screw 8 and a sliding carriage 9. The lead screw 8 is installed inside the explosion-proof cabinet 1 and rotates synchronously with the switch output terminal 31. The sliding carriage 9 is installed inside the explosion-proof cabinet 1, and a slider is provided at the bottom of the sliding carriage 9, which meshes with the lead screw 8. The lead screw 8 drives the sliding carriage 9. The circuit breaker core 2 is installed inside the sliding carriage 9. The switch output terminal 31 of the drive rod 3 drives the lead screw 8 to rotate synchronously. The lead screw 8 meshes with the slider at the bottom of the sliding carriage 9, thereby driving the sliding carriage 9 and the circuit breaker core 2 on it to slide inside the explosion-proof cabinet 1 to complete the contact or separation. The rotational motion is converted into precise linear motion by the transmission of the lead screw 8, ensuring the smooth and controllable movement of the circuit breaker core 2, making the connection between the moving and stationary contacts 21 reliable, reducing the risk of arcing or poor contact. At the same time, the whole structure is compact and suitable for the limited space inside the explosion-proof cabinet 1, improving the accuracy and lifespan of the switch operation.

[0028] Working process: The operator rotates the drive rod 3 from outside the explosion-proof cabinet 1. The drive rod 3 meshes with and drives the worm gear 41 through its worm section 32, thereby driving the main rod 4 and the turntable 6 fixed on it to rotate synchronously. During the rotation, the arc-shaped protrusions 61 distributed on the outer periphery of the turntable 6 push the sliding rod 5 that is opposed to it to slide parallel. The cabinet door locking end 51 of the sliding rod 5 then physically locks the cabinet door 11 to the adjacent fixed plate 12. At the same time, the switch output end 31 of the drive rod 3 drives the lead screw 8 to rotate synchronously. The sliding carriage 9 that meshes with the lead screw 8 drives the circuit breaker core 2 to slide smoothly inside the explosion-proof cabinet 1, so that the moving contact 22 and the stationary contact 21 can reliably contact or separate, completing the closing or opening operation of the switch.

Claims

1. An explosion-proof high-voltage vacuum switch linkage device with a built-in interlocking mechanism, comprising an explosion-proof cabinet (1) and a circuit breaker core (2), wherein a stationary contact (21) is provided inside the explosion-proof cabinet (1), the circuit breaker core (2) is slidably disposed inside the explosion-proof cabinet (1), and the circuit breaker core (2) is provided with a moving contact (22) opposite to the stationary contact (21), characterized in that: Including a drive rod (3), a main rod (4), a sliding rod (5), and a turntable (6), the explosion-proof cabinet (1) has a door panel (11) for opening the explosion-proof cabinet (1) and a fixed plate (12) adjacent to the door panel (11). The main rod (4) and the sliding rod (5) are set inside the explosion-proof cabinet (1) and are parallel to the door panel (11). The drive rod (3) is set on the explosion-proof cabinet (1) and is perpendicular to the door panel (11). The drive rod (3) drives the main rod (4) to rotate. The drive rod (3) has a function for driving the circuit breaker mechanism (2). The switch output terminal (31) is slid and forms a contact between the stationary contact (21) and the moving contact (22). The turntable (6) is set on the main rod (4) and rotates synchronously with the main rod (4). The sliding rod (5) is set parallel to the main rod (4) and abuts against the turntable (6). The turntable (6) has a protrusion (61) that forms the sliding of the sliding rod (5). The other side of the sliding rod (5) relative to the turntable (6) has a cabinet door locking end (51). The cabinet door locking end (51) forms the fixing of the cabinet panel (11) and the fixed plate (12).

2. The explosion-proof high-voltage vacuum switch linkage device with built-in locking mechanism according to claim 1, characterized in that: It also includes a worm gear (41), a worm part (32) is provided on the drive rod (3) and the worm part (32) is located inside the explosion-proof cabinet (1), the worm gear (41) is provided on the main rod (4) and drives the main rod (4) to rotate, the worm gear (41) and the worm part (32) mesh together and form the drive rod (3) to drive the main rod (4).

3. The explosion-proof high-voltage vacuum switch linkage device with built-in locking mechanism according to claim 1, characterized in that: The drive rod (3) has a drive end (33) located outside the explosion-proof cabinet (1).

4. The explosion-proof high-voltage vacuum switch linkage device with built-in locking mechanism according to claim 1, characterized in that: The protrusions (61) are arc-shaped and distributed along the outer periphery of the turntable (6). There are two protrusions (61), and a smooth section (62) is provided between the protrusions (61). The sliding rod (5) abuts against the protrusions (61) or the smooth section (62) and constitutes the sliding of the sliding rod (5).

5. The explosion-proof high-voltage vacuum switch linkage device with built-in locking mechanism according to claim 1, characterized in that: It also includes a pressure spring (7), which is mounted on the sliding rod (5) and drives the sliding rod (5) to abut against the turntable (6).

6. The explosion-proof high-voltage vacuum switch linkage device with built-in locking mechanism according to claim 1, characterized in that: It also includes a lead screw (8) and a sliding carriage (9). The lead screw (8) is installed inside the explosion-proof cabinet (1) and rotates synchronously with the switch output terminal (31). The sliding carriage (9) is installed inside the explosion-proof cabinet (1). A slider is installed at the bottom of the sliding carriage (9) and the slider meshes with the lead screw (8). The lead screw (8) drives the sliding carriage (9). The circuit breaker mechanism (2) is installed inside the sliding carriage (9).

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