Opening locking device for sulfur hexafluoride arc extinguishing load switch

Abstract

The utility model relates to an opening locking device for a sulfur hexafluoride arc extinguishing load switch, which comprises a locking box, a locking rod, an operation assembly and a locking piece are arranged in the locking box, the locking rod penetrates through the locking box in a sliding manner, the locking rod comprises a locking end, the locking end penetrates out of the locking box to be used for blocking an operation handle, and the locking piece is used for locking the operation handle. The operation assembly is used for driving the locking rod to slide so as to control the locking end to stretch out to block the operation handle or to return to the locking box to relieve blocking of the operation handle, and the locking piece is used for locking the locking rod. The anti-mistaken-touch effect is achieved through a mechanical structure, and the anti-mistaken-touch effect is more stable. The blocking state of the locking rod is relatively locked through the locking piece, so that the locking rod is kept in the blocking state, and the possibility that the locking rod slides under the influence of external factors is reduced.

Description

Technical Field

[0001] The present application relates to the field of load switches, and in particular to a trip locking device for a sulfur hexafluoride arc-extinguishing load switch. Background Art

[0002] Sulfur hexafluoride arc-quenching load switches are widely used in various power systems, particularly where high reliability and long life are required. They feature a simple structure and are easy to operate. Sulfur hexafluoride load switches are typically used in combination with fuses to handle the normal operating and overload currents of transformers, as well as the switching of transfer currents.

[0003] Existing sulfur hexafluoride arc-extinguishing load switches require regular maintenance and repair. If someone accidentally touches the operating handle while the maintenance personnel are performing maintenance on the line, it will cause losses to the user and pose a personal safety threat to the offline maintenance personnel. Utility Model Content

[0004] In order to prevent personnel from accidentally touching the operating handle during maintenance, the present application provides a trip locking device for a sulfur hexafluoride arc-extinguishing load switch.

[0005] The present application provides a trip locking device for a sulfur hexafluoride arc-extinguishing load switch, which adopts the following technical solution:

[0006] A trip locking device for a sulfur hexafluoride arc-extinguishing load switch includes a locking box, in which a locking rod, an operating assembly and a locking piece are provided. The locking rod slides through the locking box, and the locking rod includes a locking end, which passes through the locking box to block the operating handle. The operating assembly is used to drive the locking rod to slide to control the locking end to extend out to block the operating handle or retract into the locking box to release the blockage of the operating handle. The locking piece is used to lock the locking rod.

[0007] By adopting this technical solution, the operating assembly drives the locking rod out of the locking box to block the operating handle, preventing accidental touch of the operating handle during line maintenance. This mechanical structure achieves a more stable anti-touch effect. The locking member relatively locks the blocking state of the locking rod, keeping it in the blocked state and reducing the possibility of the locking rod slipping under external factors.

[0008] Optionally, it includes an interlocking plate, which is rotatably arranged in the locking box. The interlocking plate includes a locking rod transmission part and an operating component transmission part. The locking rod transmission part rotates to drive the locking rod to slide. The operating component is slidably arranged on the locking box, and the operating component slides to drive the operating component transmission part to rotate.

[0009] By adopting the technical scheme, the movement direction of the operating assembly is converted into the movement direction of the locking rod through the interlocking plate, so that the layout of the operating assembly is more convenient, thereby facilitating the operation of the operator.

[0010] Optionally, a first slot is formed on the locking rod transmission part, a transmission rod is arranged on the locking rod, the first slot is used for inserting and sliding the transmission rod, a second slot is formed on the operating assembly transmission part, and the operating assembly comprises a transmission end, and the second slot is used for inserting and sliding the transmission end.

[0011] By adopting the technical scheme, the offset generated by the conversion between the linear movement and the rotation can be filled by forming the slot, the linear movement of the locking rod and the operating assembly is ensured, the stability of the mechanism is improved, and the structure is simple and convenient to process.

[0012] Optionally, the locking piece comprises a locking spring plate arranged in the locking box, the locking spring plate is arranged in a curved manner, the convex arc surface of the locking spring plate faces the interlocking plate, and the two ends of the curved locking spring plate are respectively used for abutting against the interlocking plate in the blocked operating handle state or the interlocking plate in the unblocked operating handle state.

[0013] By adopting the technical scheme, the curved locking spring plate not only can keep the locking rod in the initial state, but also can keep the locking rod in the blocked state, the movement of the locking rod is limited without completely locking the locking rod, the operator only needs to exert a little force to change the state of the locking rod, the operation is convenient, the locking spring plate is convenient to process, and the production cost is reduced.

[0014] Optionally, the operating assembly comprises a pull rod and a pull ring, the pull rod extends away from the interlocking plate, and the pull ring is arranged on the end of the pull rod extending out of the locking box.

[0015] By adopting the technical scheme, the operator drives the pull rod to move by pulling the pull ring, the operation is convenient, the pull rod and the pull ring are simple in structure and convenient to process.

[0016] Optionally, a limiting piece is arranged on the locking rod, and the limiting piece is used for abutting against the inner wall of the locking box to limit the movement stroke of the locking rod.

[0017] By adopting the technical scheme, the limiting piece limits the movement of the locking rod, so that the locking rod is prevented from moving excessively and coming out of the locking box.

[0018] Optionally, a controller is arranged in the locking box, a contact block and a contact spring plate are arranged on the side wall of the controller, the movable end of the contact spring plate is used for abutting against the locking rod, the locking rod is used for driving the contact spring plate to move, so that the contact spring plate abuts against and electrically connects with the contact block.

[0019] By adopting the technical scheme, the contact spring and the contact block are driven to realize electrical connection by the movement of the locking rod, the locking signal is turned on, and the controller closes the function of electrically controlling the opening and closing of the switch, so that the functions of manually and electrically controlling the opening and closing of the switch are both closed, and the reliability and safety of the switch maintenance operation are ensured.

[0020] Optionally, the locking member comprises a locking plate, the locking plate is rotationally arranged on the outer wall of the locking box, the locking plate is provided with a plug rod, and the pull rod is provided with a plug hole for inserting the plug rod.

[0021] By adopting the technical scheme, when the locking rod is in the blocking state, the plug rod on the locking plate is inserted into the plug hole to lock the blocking state of the locking rod, preventing the locking rod from being changed by mistake.

[0022] Optionally, a fixed plate is rotationally arranged on the outer wall of the locking box, the rotation surface of the fixed plate is perpendicular to the rotation surface of the locking plate, and the fixed plate is used for abutting and clamping the locking plate.

[0023] By adopting the technical scheme, the initial state of the locking plate is locked by the fixed plate to prevent the locking plate from interfering with the pull rod during sliding, and the locking plate is unlocked by rotating the fixed plate after the pull rod is pulled into place, which is convenient to operate and has a simple structure and is convenient to process.

[0024] Optionally, a guide rail is arranged on the inner wall of the locking box, and the operation assembly is slidingly arranged on the guide rail.

[0025] By adopting the technical scheme, the movement of the operation assembly is guided and limited by the guide rail, and the stability of the movement of the operation assembly is further improved.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The mechanical structure realizes the effect of preventing accidental touch, which is more stable. The locking member relatively locks the blocking state of the locking rod, so that the locking rod remains in the blocking state, and the possibility of sliding of the locking rod under the influence of external factors is reduced.

[0028] 2. The curved locking spring not only keeps the locking rod in the initial state, but also keeps the locking rod in the blocking state. Under the premise of limiting the movement of the locking rod, the locking rod is not completely locked, and the operator only needs to exert a little force to change the state of the locking rod, which is convenient to operate, the locking spring is convenient to process, and the production cost is reduced.

[0029] 3. The functions of manually and electrically controlling the opening and closing of the switch are both closed, and the reliability and safety of the switch maintenance operation are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic diagram of embodiment 1 of the present application.

[0031] Figure 2 is an assembly schematic diagram of the locking rod, interlocking plate and operating assembly in embodiment 1 of the present application.

[0032] Figure 3 is a structural schematic diagram of embodiment 2 of the present application.

[0033] Figure 4 is an enlarged view of A in Figure 3

[0034] Figure 5 is a right view of embodiment 2 of the present application when the locking rod is in the blocking state.

[0035] Reference sign explanation: 1, locking box; 11, guide rail; 2, locking rod; 21, locking end; 22, transmission rod; 23, limiting piece; 3, operating assembly; 31, transmission end; 32, pull rod; 321, insertion hole; 33, pull ring; 4, locking piece; 41, locking spring piece; 42, lock plate; 421, insertion rod; 5, interlocking plate; 51, locking rod transmission part; 511, first slot; 52, operating assembly transmission part; 521, second slot; 6, controller; 61, contact block; 62, contact spring piece; 7, fixed plate; 8, mounting plate. DETAILED DESCRIPTION

[0036] The following will be described in detail in combination with the accompanying Figures 1-5 The present application will be further described in detail.

[0037] Embodiment 1:

[0038] Embodiment 1 of the present application discloses a breaking and locking device for a sulfur hexafluoride arc-extinguishing load switch. Referring to Figure 1 , comprising a locking box 1, the locking box 1 is fixedly installed on the side wall of the sulfur hexafluoride arc-extinguishing load switch through a bolt assembly, and the locking box 1 is installed with a locking rod 2, an operating assembly 3, a locking piece 4 and an interlocking plate 5. Two opposite side walls of the locking box 1 are provided with through holes, the locking rod 2 penetrates through the locking box 1 and slides in the two through holes, the end of the locking rod 2 sliding out of the locking box 1 serves as a locking end 21, when the locking rod 2 is in an initial state, the locking end 21 avoids the operation handle, so that the locking end 21 is partially retracted in the locking box 1, which is an unlocking state, when the locking rod 2 is in a blocking state, the locking end 21 extends out of the locking box 1 by a longer distance and is located on the movement stroke of the operation handle, so as to resist the operation handle to block the movement of the operation handle, which is a blocking state.

[0039] Referring to Figure 1 ​A transmission rod 22 and a limit piece 23 are fixedly mounted on the locking rod 2. In this embodiment, the extension direction of the transmission rod 22 is perpendicular to the sliding direction of the locking rod 2, and the transmission rod 22 extends in the direction of the sliding axis away from the locking rod 2. The transmission rod 22 can be fixed on the locking rod 2 by a bolt, and the limit piece 23 is sleeved and fixed on the locking rod 2. A through hole and a threaded hole are respectively provided on the limit piece 23 and the locking rod 2. The transmission rod 22 passes through the through hole through the limit piece 23 and is then tightened and fixed to the locking rod 2 through the threaded hole, and the end of the transmission rod 2 passes through the locking rod 2 and cooperates with the interlocking plate 5 for transmission.

[0040] Reference Figure 2 The interlocking plate 5 is rotatably mounted on the inner wall of the locking box 1. The interlocking plate 5 includes a locking rod transmission portion 51 and an operating assembly transmission portion 52, which are located on either side of the interlocking plate 5's rotation axis. The locking rod transmission portion 51 defines a first strip-shaped hole 511, which allows the end of the transmission rod 22 to pass through the locking rod 2 and slide therein. The operating assembly transmission portion 52 defines a second strip-shaped hole 521, which engages with the operating assembly 3 in a transmission manner. Both the first strip-shaped hole 511 and the second strip-shaped hole 521 extend in a direction pointing toward the interlocking plate 5's rotation axis.

[0041] Reference Figure 1 and Figure 2 The operating assembly 3 is slidably mounted on the locking box 1. The operating assembly 3 includes a transmission end 31, a pull rod 32, and a pull ring 33. The pull rod 32 extends and slides in a direction perpendicular to the movement direction of the locking rod 2. The pull rod 32 extends from the inside of the locking box 1 through the side wall of the locking box 1 to the outside of the locking box 1. The transmission end 31 and the pull ring 33 are respectively provided at both ends of the pull rod 32. The transmission end 31 is fixed to the pull rod 32 and is located inside the locking box 1. The transmission end 31 extends in a direction perpendicular to the extension direction of the pull rod 32. The transmission end 31 is inserted into the second strip hole 521 and slides within the second strip hole 521. A through hole is opened on the bottom wall of the locking box 1 for the pull rod 32 to pass through and extend out. The pull ring 33 is integrally formed on the end of the pull rod 32 that passes through the locking box 1.

[0042] Reference Figure 1 The locking member 4 includes a locking spring 41, one end of which is fixed to the inner wall of the locking box 1 by a bolt assembly, and the other end is a movable end. The locking spring 41 is curved, with the convex arc surface of the locking spring 41 facing the interlocking plate 5. Both ends of the convex arc surface of the locking spring 41 are designed to interfere with the operating assembly transmission portion 52 of the interlocking plate 5, thereby controlling the interlocking plate 5 to control the locking end 21 to be in the blocked state or the unlocked state.

[0043] Reference Figure 1The installation plate 8 is fixedly installed on the inner wall surface of the locking box 1 through a bolt assembly, the controller 6 is fixedly installed on the installation plate 8 through a bolt assembly, the contact block 61 and the contact spring 62 are fixedly installed on the side wall of the controller 6, one end of the contact spring 62 is fixed on the side wall of the controller 6, and the other end is a movable end, the movable end of the contact spring 62 abuts against the transmission rod 22 on the locking rod 2, that is, abuts against the bolt head, and when the locking rod 2 slides towards the blocking state, the contact spring 62 is driven to move, so that the contact spring 62 abuts against and electrically connects with the contact block 61.

[0044] The implementation principle of the embodiment 1 of the application is as follows: when the line is maintained, the SF6 arc-extinguishing load switch is in the open state, the operator overcomes the elastic force of the locking spring 41 to pull the pull ring 33 away from the locking rod 2, drives the pull rod 32 and the transmission end 31 to move, further drives the interlocking plate 5 to rotate, further drives the locking rod 2 to move towards the locking end 21, the locking end 21 extends out of the locking box 1 by a long distance, until the limiting piece 23 abuts against the inner wall surface of the locking box 1, the locking rod 2 stops moving, at this time, the locking spring 41 restores to the original state and abuts against the interlocking plate 5 to limit the rotation of the interlocking plate 5. While the locking rod 2 slides, the contact spring 62 is bent and deformed by the transmission rod 22, the contact spring 62 abuts against the contact block 61 to realize electrical connection, the locking signal is turned on, and the controller 6 closes the function of electrically controlling the opening and closing of the switch. When the maintenance is completed, the operator overcomes the elastic force of the locking spring 41 to push the pull ring 33 towards the locking rod 2, drives the pull rod 32 and the transmission end 31 to move, further drives the interlocking plate 5 to rotate, further drives the locking rod 2 to move away from the locking end 21, and the locking end 21 is retracted, at this time, the contact spring 62 is separated from the contact block 61, and the operator can operate the handle manually or in an electrically controlled manner to close the switch.

[0045] Embodiment 2

[0046] With reference to Figure 3 Different from the embodiment 1, the guiding rail 11 is fixedly installed on the inner wall surface of the locking box 1 in the embodiment, the guiding rail 11 extends along the movement direction of the operation assembly 3, and the transmission end 31 is inserted into the guiding rail 11 and slides along the guiding rail 11.

[0047] With reference to Figure 3 With Figure 4The locking member 4 further comprises a locking plate 42, which is pivotally mounted on the bottom wall of the locking box 1, and the rotation axis of the locking plate 42 is parallel to the movement direction of the locking rod 2, i.e. the rotation surface of the locking plate 42 is perpendicular to the bottom wall of the locking box 1, and a plug rod 421 is fixedly mounted on the side wall of the locking plate 42. A plug hole 321 is formed on the pull rod 32, which is a strip-shaped hole, and the plug hole 321 is for the plug rod 421 to be inserted into. The bottom wall of the locking box 1, to which the locking plate 42 is connected, is further pivotally mounted with a fixing plate 7, and the rotation axis of the fixing plate 7 is parallel to the length direction of the pull rod 32, i.e. the rotation direction of the fixing plate 7 is parallel to the bottom wall of the locking box 1, and the side wall of the fixing plate 7 is used to abut against the side wall of the locking plate 42 to fix the locking plate 42.

[0048] With reference to Figure 5 When the circuit is maintained, the SF6 arc extinguishing load switch is in an open state, and the operator pulls the pull ring 33 away from the locking rod 2, drives the pull rod 32 to move, and then drives the locking rod 2 to move. At this time, the operator rotates the fixing plate 7 to make the side wall of the fixing plate 7 disengage from the side wall of the locking plate 42, and the locking plate 42 is unlocked, and the locking plate 42 is rotated until the plug rod 421 is inserted into the plug hole 321 to lock the operating assembly 3.

[0049] The above are the preferred embodiments of the present application, and are not used to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A trip locking device for a sulfur hexafluoride arc-extinguishing load switch, characterized by: The utility model provides a locking box, which comprises a locking box (1), a locking rod (2), an operating assembly (3) and a locking piece (4) arranged in the locking box (1), the locking rod (2) is slidably arranged in the locking box (1), the locking rod (2) comprises a locking end (21), the locking end (21) is arranged outside the locking box (1) and used for blocking an operating handle, the operating assembly (3) is used for driving the locking rod (2) to slide, so that the locking end (21) is extended to block the operating handle or is retracted into the locking box (1) to unblock the operating handle, and the locking piece (4) is used for locking the locking rod (2).

2. The opening blocking device for a SF6 arc-extinguishing load switch according to claim 1, characterized in that: The utility model provides a locking box, which comprises a locking box (1), a locking rod (2), an operating assembly (3) and a locking piece (4) arranged in the locking box (1), the locking rod (2) is slidably arranged in the locking box (1), the locking rod (2) comprises a locking end (21), the locking end (21) is arranged outside the locking box (1) and used for blocking an operating handle, the operating assembly (3) is used for driving the locking rod (2) to slide, so that the locking end (21) is extended to block the operating handle or is retracted into the locking box (1) to unblock the operating handle, and the locking piece (4) is used for locking the locking rod (2).

3. The opening blocking device for a SF6 arc-extinguishing load switch according to claim 2, characterized in that: The locking rod driving part (51) is provided with a first slot (511), the locking rod (2) is provided with a driving rod (22), the first slot (511) is used for inserting and sliding the driving rod (22), the operating assembly driving part (52) is provided with a second slot (521), and the operating assembly (3) comprises a driving end (31); the second slot (521) is used for inserting and sliding the driving end (31).

4. The opening blocking device for a SF6 arc-extinguishing load break switch according to claim 2, characterized in that: The locking piece (4) comprises a locking spring (41) arranged in the locking box (1), the locking spring (41) is arranged in a bent mode, the convex arc surface of the locking spring (41) faces the interlocking plate (5), and the two ends of the bent locking spring (41) are respectively used for abutting against the interlocking plate (5) in the blocking operating handle state or the interlocking plate (5) in the unblocking operating handle state.

5. The opening blocking device for a SF6 arc-extinguishing load break switch according to claim 2, characterized in that: The operating assembly (3) comprises a pull rod (32) and a pull ring (33), the pull rod (32) extends away from the interlocking plate (5), and the pull ring (33) is arranged on the end of the pull rod (32) extending out of the locking box (1).

6. The opening blocking device for a SF6 arc-extinguishing load break switch according to claim 1, characterized in that: The locking rod (2) is provided with a limiting piece (23), the limiting piece (23) is used for abutting against the inner wall of the locking box (1) to limit the movement stroke of the locking rod (2).

7. The opening blocking device for a SF6 arc-hushing load break switch according to claim 1, characterized in that: The locking box (1) is provided with a controller (6), the side wall of the controller (6) is provided with a contact block (61) and a contact spring (62), the movable end of the contact spring (62) is used for abutting against the locking rod (2), the locking rod (2) is used for driving the contact spring (62) to move, so that the contact spring (62) abuts against the contact block (61) and is electrically connected.

8. The opening blocking device for a SF6 arc-extinguishing load switch according to claim 5, characterized by: The locking piece (4) comprises a lock plate (42), the lock plate (42) is arranged on the outer wall of the locking box (1) in a rotating mode, the lock plate (42) is provided with an insertion rod (421), the pull rod (32) is provided with an insertion hole (321), and the insertion hole (321) is used for inserting the insertion rod (421).

9. The opening blocking device for a SF6 arc-extinguishing load switch according to claim 8, characterized in that: The fixed plate (7) is arranged on the outer wall of the locking box (1) and rotates, the rotating surface of the fixed plate (7) is perpendicular to the rotating surface of the lock plate (42), and the fixed plate (7) is used for abutting and clamping with the lock plate (42).

10. The opening blocking device for a SF6 arc-extinguishing load break switch according to claim 2, characterized in that: The inner wall of the locking box (1) is provided with a guide rail (11), and the operation assembly (3) is slidingly arranged on the guide rail (11).

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