Holding mechanism of switchgear

Abstract

The utility model belongs to the technical field of circuit breakers, and particularly relates to a holding mechanism of switch equipment, which comprises a lock rod, a support block and a holding plate, the lock rod is movably arranged on a circuit breaker and a cable chamber in the vertical direction, and the support block is movably arranged in the cable chamber in the horizontal direction. Under the action of the elastic piece, the retaining plate moves towards the outside of the cable chamber and stops at the bottom of the lock rod which is separated from the lock hole, the retaining plate is connected with the lock rod and is movably arranged on the circuit breaker in the vertical direction, and an arc-shaped limiting groove for a crank arm lock plate of the circuit breaker to enter and exit is formed in the bottom of the retaining plate; the crank arm locking plate is separated from the arc-shaped limiting groove to relieve limitation on the retaining plate, a receding groove and a limiting block formed in a notch of the receding groove are formed in the top of the retaining plate, and when the locking rod moves to the upper limit position, an opening button plate of the circuit breaker enters the receding groove and is limited by the limiting block and cannot be started. The technical problem that a cable chamber cabinet door in the prior art is not provided with a corresponding mechanism to be matched with a circuit breaker to ensure safety is solved.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, and in particular relates to a holding mechanism for a switchgear. Background Technology

[0002] Circuit breakers, disconnectors, and cable compartments are all installed in a connected manner. When the cable compartment door needs to be opened, the disconnector must be in the grounded position, and the circuit breaker must be in the closed position. Simultaneously, it must be ensured that the circuit breaker cannot leave the closed position and trip before the cable compartment door is closed again after being opened. For safety, the circuit breaker must be in the closed position before the cable compartment door is opened, and it must not leave the closed position before the cable compartment door is closed again after being opened. However, existing technology lacks corresponding safety features. Summary of the Invention

[0003] To address the technical problem in the prior art where cable compartment doors lack corresponding mechanisms to cooperate with circuit breakers to ensure safety, this application proposes a holding mechanism for switchgear, which solves the aforementioned technical problem.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] This utility model provides a holding mechanism for a switchgear, assembled between a circuit breaker and a cable compartment, comprising: a locking rod, which is vertically movably disposed on the circuit breaker and the cable compartment; the locking rod, in its lower limit position, inserts into the keyhole of the cable compartment door latch to lock the cable compartment door; and in its upper limit position, the locking rod disengages from the keyhole of the cable compartment door latch; and a support block, which is horizontally movably disposed within the cable compartment and, under the action of an elastic element, moves toward the outside of the cable compartment and rests against the bottom of the locking rod that has disengaged from the keyhole, so that when the cable compartment door closes again... Before closing, the locking rod is always in the upper limit position; a retaining plate is connected to the locking rod and is movably disposed on the circuit breaker in the vertical direction. The bottom of the retaining plate has an arc-shaped limiting groove for the crank arm locking plate of the circuit breaker to enter and exit. When the circuit breaker is in the closed state, the crank arm locking plate disengages from the arc-shaped limiting groove to release the restriction on the retaining plate. The top of the retaining plate has a clearance groove and a limiting block formed at the opening of the clearance groove. When the locking rod moves to the upper limit position, the circuit breaker's trip button plate enters the clearance groove and is restricted by the limiting block and cannot be activated.

[0006] Furthermore, the cable compartment is equipped with a lock box for mounting the support block. One side of the lock box is open, and the open side is the same as the open side of the cable compartment. Horizontally extending limiting guide grooves are provided on the two side plates of the lock box to cooperate with the two guide blades on the support block.

[0007] Furthermore, a vertically extending force-bearing plate is formed on the support block, and a horizontally arranged movable rod is connected to the first surface of the force-bearing plate. The movable rod is movably disposed on the lock box, and an elastic element is sleeved on the movable rod. The elastic element is clamped between the force-bearing plate and the back plate of the lock box, so as to push the support block toward the opening surface of the lock box in a natural state. At the same time, when the cable compartment cabinet door is closed again, the latch of the cable compartment cabinet door pushes the support block back by pushing the second surface of the force-bearing plate, releasing the support of the locking rod.

[0008] Furthermore, a locking pin is formed on the crank arm locking plate that engages with the arc-shaped limiting groove.

[0009] Furthermore, a locking block is formed on the top of the retaining plate. When the locking rod moves to the upper limit position, the locking block presses against the micro switch of the circuit breaker to disconnect the electronic control circuit available when the circuit breaker is tripped.

[0010] Based on the above technical solution, the technical effects that this utility model can achieve are as follows:

[0011] The retaining mechanism of this utility model requires that before the locking rod releases the cable compartment cabinet door, the crank arm locking plate of the circuit breaker must be in the closed position. Otherwise, the crank arm locking plate in the open position is engaged in the arc-shaped limiting groove, and the crank arm locking plate will block the upward path of the retaining plate, preventing the locking rod connected to the retaining plate from disengaging from the lock eye of the cable compartment cabinet door latch, thus preventing the cable compartment cabinet door from unlocking. On the other hand, after the cable compartment cabinet door is unlocked, the locking rod is in the upper limit position, which means the retaining plate connected to the locking rod is in the upper limit position, and the mechanical opening button plate enters the clearance groove and is limited. The limit block blocks the opening rotation path of the circuit breaker button, preventing the button from rotating and the circuit breaker from entering the opening state. Simultaneously, to ensure the holding plate is in the upper limit position, a support block is installed in the cable compartment. When the cable compartment door is opened, the support block moves to the bottom of the locking rod under the action of the elastic element, supporting the locking rod and preventing it from falling. This keeps the holding plate in the upper limit position, ensuring construction safety and solving the technical problem in existing technologies where the cable compartment door lacks a corresponding mechanism to cooperate with the circuit breaker for safety. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the holding mechanism of the switchgear of this utility model, where the holding plate is in the lower limit position and the crank arm locking plate is in the closed state.

[0013] Figure 2 This is a schematic diagram of the support block of the holding mechanism of the switching device of this utility model.

[0014] Wherein: a-circuit breaker, a1-crank arm locking plate, a11-locking pin, a2-opening button plate, a3-micro switch; b-cable compartment, b1-locking buckle, b2-lock box, b3-limiting guide groove, b4-back plate; 1-locking rod; 2-support block, 21-guide blade, 22-force-bearing plate, 23-moving rod; 3-holding plate, 31-arc-shaped limit groove, 32-yield groove, 33-limiting block, 34-locking block. Detailed Implementation

[0015] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0016] like Figure 1-2 As shown, this utility model provides a holding mechanism for a switchgear, assembled between the door of a circuit breaker a and the door of a cable compartment b. It includes a locking rod 1, a support block 2, and a holding plate 3. The locking rod 1 is vertically movably mounted on the circuit breaker a and the cable compartment b. When the locking rod 1 is in its lower limit position, it inserts into the keyhole of the cable compartment b door latch b1 to lock the cable compartment b door. When the locking rod 1 is in its upper limit position, it disengages from the keyhole of the cable compartment b door latch b1, allowing the cable compartment b door to be opened. The support block 2 is horizontally movably mounted inside the cable compartment b and, under the action of an elastic element, moves outwards from the cable compartment b and stops at the bottom of the locking rod 1, which has disengaged from the keyhole, preventing the locking rod 1 from falling. This ensures that the locking rod 1 remains in its upper limit position until the cable compartment b door closes again. The holding plate 3 and the locking rod 1... The retaining plate 3 is connected to and vertically movable on the circuit breaker a. The retaining plate 3 can be limited on the circuit breaker a by the cooperation of the guide groove and the limit nut. The locking rod 1 has multiple connection points with the retaining plate 3, and the locking rod 1 also has multiple bends. The bottom of the retaining plate 3 forms an arc-shaped limit groove 31 for the crank arm locking plate a1 of the circuit breaker a to enter and exit. The lower end of the arc-shaped limit groove 31 is open. When the crank arm locking plate a1 of the circuit breaker a is in the closed state, it disengages from the arc-shaped limit groove 31 to release the restriction on the retaining plate 3. The top of the retaining plate 3 forms a relief groove 32 and a limit block 33 formed in the groove opening of the relief groove 32. The upper end of the relief groove 32 is open to form a groove. When the locking rod 1 moves to the upper limit position, the mechanical trip button plate a2 of the circuit breaker a enters the relief groove 32 and is restricted by the limit block 33 and cannot be activated.

[0017] In a specific embodiment of this utility model, a lock box b2 for assembling the support block 2 is arranged inside the cable chamber b. One side of the lock box b2 is open, and the open side is the same as the open side of the cable chamber b. Horizontally extending limiting guide grooves b3 are provided on the two side plates of the lock box b2 to cooperate with the two guide blades 21 on the support block 2. The cooperation between the guide blades 21 and the guide groove realizes the assembly of the support block 2 in the lock box b2, which can both guide the support block 2 and determine the extreme position of the support block 2. One of the extreme positions is that the support block 2 is exactly supported at the bottom of the lock rod 1.

[0018] Furthermore, a vertically extending force-bearing plate 22 is formed on the support block 2. A horizontally arranged movable rod 23 is connected to the first surface of the force-bearing plate 22. The movable rod 23 is movably disposed on the lock box b2 and passes through the back plate b4 of the lock box b2. An elastic element is sleeved on the movable rod 23. The elastic element is a spring sleeved on the movable rod 23. The elastic element is clamped between the force-bearing plate 22 and the back plate b4 of the lock box b2 so that the support block 2 is pushed toward the opening surface of the lock box b2 in a natural state. At the same time, when the cable compartment b cabinet door is closed again, the latch b1 of the cable compartment b cabinet door pushes the support block 2 back by pushing the second surface of the force-bearing plate 22, releasing the support of the locking rod 1.

[0019] In a specific embodiment of this utility model, a locking pin a11 is formed on the crank arm locking plate a1, which fits into the arc-shaped limiting groove 31. As the crank arm locking plate a1 rotates, the locking pin a11 moves in and out of the arc-shaped limiting groove 31.

[0020] In a preferred embodiment of the present invention, a locking block 34 is also formed on the top of the retaining plate 3. When the locking rod 1 moves to the upper limit position, the locking block 34 presses against the micro switch a3 of the circuit breaker a to disconnect the electronic control circuit available when the circuit breaker a is tripped, thereby preventing the circuit breaker a from being tripped by electrical control and further improving safety.

[0021] It should be understood that the specific embodiments described above are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A holding mechanism for a switchgear, assembled between a circuit breaker (a) and a cable compartment (b), characterized in that, include: A locking rod (1) is movably disposed on the circuit breaker (a) and the cable compartment (b) in the vertical direction. When the locking rod (1) is in the lower limit position, it is inserted into the keyhole of the cable compartment (b) cabinet door latch (b1) to lock the cable compartment (b) cabinet door. When the locking rod (1) is in the upper limit position, it is disengaged from the keyhole of the cable compartment (b) cabinet door latch (b1). Support block (2), which is movably disposed in the cable chamber (b) in the horizontal direction, and moves toward the outside of the cable chamber (b) under the action of the elastic element and stops at the bottom of the lock bar (1) that has disengaged from the keyhole, so that the lock bar (1) is always in the upper limit position before the cable chamber (b) cabinet door is closed again; A retaining plate (3) is connected to the locking rod (1) and is movably disposed on the circuit breaker (a) in the vertical direction. The bottom of the retaining plate (3) has an arc-shaped limiting groove (31) for the crank arm locking plate (a1) of the circuit breaker (a) to enter and exit. When the crank arm locking plate (a1) of the circuit breaker (a) is in the closed state, it disengages from the arc-shaped limiting groove (31) to release the restriction on the retaining plate (3). The top of the retaining plate (3) has a clearance groove (32) and a limiting block (33) formed at the opening of the clearance groove (32). When the locking rod (1) moves to the upper limit position, the trip button plate (a2) of the circuit breaker (a) enters the clearance groove (32) and is restricted by the limiting block (33) and cannot be started.

2. The holding mechanism of the switching device according to claim 1, characterized in that, The cable compartment (b) is equipped with a lock box (b2) for mounting the support block (2). One side of the lock box (b2) is open, and the opening side is the same as the opening side of the cable compartment (b). The two side plates of the lock box (b2) are provided with horizontally extending limiting guide grooves (b3) to cooperate with the two guide blades (21) on the support block (2).

3. The holding mechanism of the switching device according to claim 2, characterized in that, A vertically extending force-bearing plate (22) is formed on the support block (2). A horizontally arranged movable rod (23) is connected to the first surface of the force-bearing plate (22). The movable rod (23) is movably disposed on the lock box (b2), and an elastic element is sleeved on the movable rod (23). The elastic element is clamped between the force-bearing plate (22) and the back plate (b4) of the lock box (b2) so that the support block (2) is pushed toward the opening surface of the lock box (b2) in its natural state. At the same time, when the cable compartment (b) cabinet door is closed again, the latch (b1) of the cable compartment (b) cabinet door pushes the support block (2) back by pushing the second surface of the force-bearing plate (22), releasing the support of the locking rod (1).

4. The holding mechanism of the switching device according to claim 1, characterized in that, A locking pin (a11) is formed on the crank arm locking plate (a1) and fits into the arc-shaped limiting groove (31).

5. The holding mechanism of the switching device according to claim 1, characterized in that, The top of the retaining plate (3) is also formed with a locking block (34). When the locking rod (1) moves to the upper limit position, the locking block (34) presses against the micro switch (a3) ​​of the circuit breaker (a) to disconnect the electronic control circuit available when the circuit breaker (a) is tripped.

Images