Linkage mechanism of gas-insulated metal-enclosed switchgear

Abstract

The utility model belongs to the technical field of circuit breakers, and particularly relates to a linkage mechanism of a gas-insulated metal-enclosed switchgear, which comprises two groups of linkage devices and a unique key, each linkage device comprises a baffle plate, a program lock and a lock plate, the baffle plate can shield a switch socket of an isolating switch, and the program lock is arranged on the lock plate. The program lock is vertically arranged on the disconnecting switch, the program lock is matched with the key, the lock plate is arranged on the disconnecting switch to do linear motion in the horizontal direction, a lock groove is formed in the lock plate, the lock groove extends in the horizontal direction, and a lock cylinder of the program lock can be inserted into the lock groove to move. One section of the lock groove is a wide groove section through which the lock ring can pass, and the other section of the lock groove is a thin groove section through which the lock ring cannot pass. The technical problem that in the prior art, no safety setting is provided to ensure that disconnecting switches in two lines are not in a closed state at the same time is solved.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, and in particular relates to a linkage mechanism for a gas-insulated metal-enclosed switchgear. Background Technology

[0002] Disconnect switches integrate a grounding position into traditional two-position disconnect switches, while three-position disconnect switches have three working positions: closed, grounded, and intermediate isolation. For two disconnect switches on two lines in the same area, they cannot be in the closed state simultaneously. However, existing technology lacks a design to ensure that disconnect switches on two lines cannot be in the closed state at the same time. Summary of the Invention

[0003] To address the technical problem of the lack of safety features in existing technologies to ensure that disconnecting switches on two lines are not simultaneously in the closed state, this application proposes a linkage mechanism for gas-insulated metal-enclosed 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 linkage mechanism for a gas-insulated metal-enclosed switchgear, assembled on two sets of disconnecting switches. It includes linkage devices respectively installed on the corresponding disconnecting switches and a unique key for opening the linkage devices. The linkage device includes: a baffle that can block the switch socket of the disconnecting switch; the baffle is configured on the disconnecting switch and moves horizontally in a linear motion to switch between a locked position blocking the switch socket and a non-locked position not blocking the switch socket; and a program lock vertically configured on the disconnecting switch, paired with the key. The key cannot be pulled out of the program lock if and only if the lock cylinder of the program lock extends upwards. The upper end of the lock cylinder is provided with a locking ring with an outwardly expanding diameter. When the lock cylinder extends downwards, it blocks the baffle, preventing the baffle from switching to the unlocked position. Simultaneously, the baffle in the unlocked position blocks the downward movement path of the lock cylinder, causing the lock cylinder to extend upwards. The lock plate is mounted on the disconnect switch and moves horizontally. The lock plate has a horizontally extending lock groove into which the lock cylinder of the program lock can be inserted. One section of the lock groove is a wide groove through which the lock ring can pass, and the other section is a narrow groove through which the lock ring cannot pass. The lock plate is driven by the disconnect switch. When the disconnect switch is closed, the narrow groove aligns with the lock cylinder of the program lock; when the disconnect switch is open, the wide groove aligns with the lock cylinder of the program lock.

[0006] Furthermore, an operation window is provided on the baffle, which faces the switch socket of the disconnect switch when the baffle is in the unlocked position.

[0007] Furthermore, a blocking member that extends upward as a whole after multiple bends is formed on one end of the baffle near the program lock, so that the baffle is limited by the downward-extending lock cylinder of the program lock. At the same time, the blocking member blocks the downward movement path of the lock cylinder, so that the lock cylinder is in an upward-extending state.

[0008] Furthermore, a push rod is fixedly connected to one of the rotating shafts of the disconnecting switch. The force-bearing end of the push rod is fixedly connected to one of the rotating shafts of the disconnecting switch, and the pushing end of the push rod is hinged to the locking plate. The hinge hole where the locking plate and the push rod are hinged is a vertically extending oblong hole.

[0009] Based on the above technical solution, the technical effects that this utility model can achieve are as follows:

[0010] The linkage mechanism of this utility model for a gas-insulated metal-enclosed switchgear includes two sets of linkage devices and a single key. Each set of linkage devices is mounted on a corresponding disconnecting switch. In the initial state, the key is inserted into the program lock of the first set of linkage devices, and the disconnecting switch corresponding to the first set of linkage devices is in the closed state. The lock cylinder of the program lock of the first set of linkage devices is inserted upward into the lock groove on the lock plate, and the lock ring on the lock cylinder is limited by the narrow section of the lock groove, preventing the lock cylinder from falling back into the program lock and extending downward to the blocking baffle. The baffle can be moved to switch between the locked and unlocked positions, allowing the first set of disconnecting switches to switch from the closed state to other non-closed states. When the disconnector switches from the closed to the open state, the wide slot of the locking plate moves above the program lock and aligns with the program lock cylinder. At this time, ensure the baffle is in the locked position; otherwise, the baffle will block the downward movement of the lock cylinder and interfere with its descent. Turn the key, and the locking ring of the program lock cylinder passes down through the wide slot and disengages from the locking plate. As the program lock cylinder falls, it extends downward to block the baffle, keeping it in the locked position. The switch socket of the first disconnector cannot be operated, and the disconnector cannot be switched to the closed state. At this time, the only key can be removed from the first disconnector. Correspondingly, given the two disconnectors in the two lines in the same area... The two disconnect switches cannot be in the closed state simultaneously. Initially, the second set of disconnect switches must be in the open state, and there is no key on the second set of disconnect switches. Since the key cannot be removed from the program lock only when the lock cylinder of the program lock extends upward, the lock cylinder of the program lock on the second set of disconnect switches must be extending downward to block the baffle, and the baffle is in the locked position. At this time, insert the only key into the program lock of the second set and turn the key. The lock cylinder of the program lock moves upward and inserts into the wide groove of the lock groove in the open state. This means that the lock cylinder blocking the baffle is released from the restriction of the baffle. At this time, the baffle can be switched to the unlocked position. By operating the switch socket of the disconnect switch, the second set of disconnect switches can be switched off. When switched to the closed state, the locking plate moves horizontally, aligning the narrow groove of the locking plate with the lock cylinder of the program lock. The locking ring on the lock cylinder cannot pass through the narrow groove and retract, so the only key cannot be removed and must remain on the second set of disconnecting switches. At this time, the state of the second set of disconnecting switches is equivalent to the initial state of the first set of disconnecting switches. In summary, for two sets of disconnecting switches equipped with the linkage mechanism of the gas-insulated metal-enclosed switchgear of this utility model, no matter how it is operated, it is impossible to make both sets of disconnecting switches in the closed state at the same time. This solves the technical problem in the prior art that there is no safety setting to ensure that the disconnecting switches in the two lines are not in the closed state at the same time. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of one of the linkage devices of the linkage mechanism of the gas-insulated metal-enclosed switchgear of this utility model.

[0012] Figure 2 This is a schematic diagram from another perspective of one of the linkage devices in the linkage mechanism of the gas-insulated metal-enclosed switchgear of this utility model.

[0013] Wherein: a-disconnect switch, a1-switch socket, a2-push rod; 1-baffle, 11-operation window, 12-blocking component; 2-program lock, 21-lock cylinder, 22-lock ring; 3-lock plate, 31-lock groove, 311-wide groove section, 312-narrow groove section, 32-slender hole. Detailed Implementation

[0014] 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.

[0015] like Figure 1-2As shown, this utility model provides a linkage mechanism for a gas-insulated metal-enclosed switchgear, assembled on two sets of disconnecting switches a. It includes linkage devices installed on the corresponding disconnecting switches a and a unique key for opening the linkage devices. The linkage devices include a baffle 1, a program lock 2, and a locking plate 3. The baffle 1 can block the switch socket a1 of the disconnecting switch a. The baffle 1 is configured on the disconnecting switch a to move horizontally in a linear motion, switching between the locked position of blocking the switch socket a1 and the unlocked position of not blocking the switch socket a1. The program lock 2 is vertically configured on the disconnecting switch a and is paired with the key. The key cannot be pulled out of the program lock 2 if and only if the lock cylinder 21 of the program lock 2 extends upwards. That is, the unique key can only be pulled out when the lock cylinder 21 of the program lock 2 is extended downwards to its limit position. Initially, when the lock cylinder 21 of the program lock 2 is in the upper limit position, the lock cylinder 21 is slightly... The slightly downward protrusion does not block the baffle 1. The upper end of the lock cylinder 21 is equipped with a locking ring 22 with an outwardly expanding diameter. When the lock cylinder 21 of the program lock 2 extends downward, it blocks the baffle 1, preventing the baffle 1 from switching into the non-locked position. At the same time, the baffle 1 in the non-locked position blocks the downward movement path of the lock cylinder 21, causing the lock cylinder 21 to be in an upward-extending state. The lock plate 3 is configured on the disconnecting switch a to make horizontal linear movement. The lock plate 3 has a horizontally extending lock groove 31 that can be inserted into by the lock cylinder 21 of the program lock 2. One section of the lock groove 31 is a wide groove section 311 through which the locking ring 22 can pass, and the other section of the lock groove 31 is a narrow groove section 312 through which the locking ring 22 cannot pass. The lock plate 3 is driven by the disconnecting switch a. When the disconnecting switch a is in the closed state, the narrow groove section 312 is aligned with the lock cylinder 21 of the program lock 2. When the disconnecting switch a is in the open state, the wide groove section 311 is aligned with the lock cylinder 21 of the program lock 2.

[0016] In a specific embodiment of this utility model, an operation window 11 is provided on the baffle 1. When the baffle 1 is in the non-locked position, the operation window 11 is directly opposite the switch socket a1 of the disconnecting switch a. At this time, the operator can use a tool to pass through the operation window 11 to connect to the switch socket a1 to realize the state switching of the disconnecting switch a.

[0017] In one specific embodiment of this utility model, a blocking member 12 that extends upward as a whole after being bent twice is formed on the end of the baffle 1 near the program lock 2, so that the baffle 1 is limited by the lock cylinder 21 extending downward from the program lock 2. At the same time, the blocking member 12 blocks the downward movement path of the lock cylinder 21, so that the lock cylinder 21 is in an upward extending state.

[0018] In one specific embodiment of this utility model, a push rod a2 is fixedly connected to a rotating shaft of the disconnect switch a. The force-receiving end of the push rod a2 is fixedly connected to a rotating shaft of the disconnect switch a. The pushing end of the push rod a2 is hinged to the locking plate 3. The hinge hole where the locking plate 3 and the push rod a2 are hinged is a vertically extending waist-shaped hole 32.

[0019] 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 linkage mechanism for a gas-insulated, metal-enclosed switchgear, assembled on two sets of disconnecting switches (a), characterized in that, This includes linkage devices respectively installed on the corresponding disconnect switches (a) and a unique key for opening the linkage devices, the linkage devices comprising: A baffle (1) is provided, which can block the switch socket (a1) of the disconnecting switch (a). The baffle (1) is configured to move horizontally in a straight line on the disconnecting switch (a) to switch between the locked position of blocking the switch socket (a1) and the unlocked position of not blocking the switch socket (a1). A program lock (2) is vertically mounted on an isolating switch (a). The program lock (2) is paired with the key. The key cannot be pulled out of the program lock (2) if and only if the lock cylinder (21) of the program lock (2) extends upward. The upper end of the lock cylinder (21) is provided with a lock ring (22) with an outwardly expanding diameter. When the lock cylinder (21) of the program lock (2) extends downward, it blocks the baffle (1) so that the baffle (1) cannot switch into the non-locked position. At the same time, the baffle (1) in the non-locked position blocks the path of the lock cylinder (21) moving downward, so that the lock cylinder (21) is in the state of extending upward. A locking plate (3) is configured on a disconnecting switch (a) and moves in a horizontal linear motion. The locking plate (3) has a horizontally extending locking groove (31) into which the lock cylinder (21) of the program lock (2) can be inserted. One section of the locking groove (31) is a wide groove (311) through which the locking ring (22) can pass, and the other section of the locking groove (31) is a narrow groove (312) through which the locking ring (22) cannot pass. The locking plate (3) is driven by the disconnecting switch (a). When the disconnecting switch (a) is in the closed state, the narrow groove (312) is aligned with the lock cylinder (21) of the program lock (2). When the disconnecting switch (a) is in the open state, the wide groove (311) is aligned with the lock cylinder (21) of the program lock (2).

2. The linkage mechanism of the gas-insulated metal-enclosed switchgear according to claim 1, characterized in that, An operation window (11) is provided on the baffle (1), and the operation window (11) is directly opposite the switch socket (a1) of the isolating switch (a) when the baffle (1) is in the non-locked position.

3. The linkage mechanism of the gas-insulated metal-enclosed switchgear according to claim 1, characterized in that, The baffle (1) has a blocking member (12) that extends upward after multiple bends at one end near the program lock (2), so that the baffle (1) is limited by the lock cylinder (21) extending downward from the program lock (2). At the same time, the blocking member (12) blocks the downward movement path of the lock cylinder (21), so that the lock cylinder (21) is in an upward extending state.

4. The linkage mechanism of the gas-insulated metal-enclosed switchgear according to claim 1, characterized in that, A push rod (a2) is fixedly connected to a rotating shaft in the disconnector switch (a). The force-bearing end of the push rod (a2) is fixedly connected to a rotating shaft in the disconnector switch (a). The pushing end of the push rod (a2) is hinged to the locking plate (3). The hinge hole of the locking plate (3) and the push rod (a2) is a vertically extending waist-shaped hole (32).

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