Interlocking device for vacuum circuit breaker

Abstract

The utility model relates to the technical field of power equipment, and discloses an interlocking device for a vacuum circuit breaker, which comprises a base, a device body is fixedly connected outside the base, a plurality of isolating switches are fixedly connected at the top of the device body, a plurality of grounding switches are fixedly connected at the bottom of the device body, and the grounding switches are fixedly connected at the bottom of the device body. The outer part of the base is fixedly connected with a wiring terminal, the inner part of the base is fixedly connected with a self-locking mechanism, and the outer part of the base is fixedly connected with a plurality of anti-loosening mechanisms; the self-locking mechanism comprises a driving rod, the exterior of the driving rod is rotationally connected to the interior of the base, and a plurality of trigger plates are fixedly connected to the exterior of the driving rod. According to the utility model, by rotating the spring bolt, the driven rod drives the trigger plate to move, and by cooperating with the pawl driven by the tension spring, when the grounding switch is switched on in place, the pawl is clamped into the tooth groove of the ratchet wheel to realize self-locking, false switching-off is prevented, and the safety of grounding operation is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to power equipment technical field especially relates to a interlocking device for vacuum circuit breaker. BACKGROUND

[0002] In high voltage distribution room, prevent circuit breaker from misoperation earthing switch, avoid short circuit accident, in transformer substation, ensure that the circuit breaker trolley is in test position and can close, prevent plugging with load, in the switch cabinet of wind power photovoltaic power station, interlocking device restricts that cabinet door can open only in the circuit breaker break state, guarantees the maintenance safety.

[0003] The interlocking device part in prior art adopts mechanical structure, restricts the operation of relevant components according to the break and closing state of circuit breaker by means of connecting rod, lock catch and other components, prevents misoperation, and the structure is simple but the assembly precision is high, and the reliability is easily affected by wear, when the circuit breaker is in a specific position or state, the electromagnetic element is powered on or powered off, controls the opening and closing of lock, realizes operation interlock, and the response speed is fast.

[0004] But in the specific use process, the earthing switch cannot be self-locked after closing, is easily misoperated to cause electric shock risk due to vibration, causes equipment burnout due to misoperation leading to earthing failure, has no idle protection when reverse operation, and is easily closed with load, which greatly weakens the earthing operation safety, increases the hidden danger of accident, and the above problems are solved by the interlocking device for vacuum circuit breaker. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides an interlocking device for vacuum circuit breaker, which aims at improving the problem that part of interlocking devices in prior art cannot realize self-locking of earthing switch after closing.

[0006] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0007] An interlocking device for vacuum circuit breaker, including the base, the outside fixed connection of base has the device body, the top of device body is fixedly connected with a plurality of disconnecting switches, the bottom of device body is fixedly connected with a plurality of earthing switches, the outside fixed connection of base has wiring terminal, the inside fixed connection of base has self-locking mechanism, the outside fixed connection of base has a plurality of anti-loosening mechanisms;

[0008] The self-locking mechanism comprises a driving rod, the outer part of the driving rod is rotationally connected to the inner part of the base, the outer part of the driving rod is fixedly connected with a plurality of trigger plates, the inner part of the base is rotationally connected with a driven rod, the outer part of the driving rod is fixedly connected with a transmission assembly, the outer right side of the driving rod is fixedly connected with a ratchet wheel, the inner part of the base is fixedly connected with a support plate, the outer part of the support plate is rotationally connected with a pawl, the outer part of the pawl is fixedly connected with a follower rod, and the outer part of the pawl is provided with a tension spring;

[0009] As a further description of the above technical solution:

[0010] The transmission assembly comprises a driving wheel, the outer part of the driving wheel is fixedly connected to the outer part of the driving rod, and the outer part of the driving wheel is sleeved with a belt.

[0011] As a further description of the above technical solution:

[0012] The outer part of the driven rod is fixedly connected with a driven wheel, the outer right side of the driven rod is fixedly connected with a lock tongue, and the outer part of the driven wheel is rotationally connected to the inner part of the base.

[0013] As a further description of the above technical solution:

[0014] The anti-loosening mechanism comprises a fixed shaft, the outer part of the fixed shaft is fixed to the outer part of the base, and the inner part of the fixed shaft is fixedly connected with a connecting rod.

[0015] As a further description of the above technical solution:

[0016] The outer part of the connecting rod is fixedly connected with a plurality of taper locking sleeves, and the outer part of the taper locking sleeve is fixedly connected with a plurality of fixed bolts.

[0017] As a further description of the above technical solution:

[0018] The outer left side of the fixed bolt is fixedly connected with a plurality of spring washers, and the outer part of the connecting rod is fixedly connected with a plurality of connecting rings.

[0019] As a further description of the above technical solution:

[0020] The outer part of the connecting ring is fixedly connected with a connecting plate, the outer part of the connecting plate is fixedly connected with an adapter plate, and the outer part of the adapter plate is fixedly connected with an isolation knife.

[0021] As a further description of the above technical solution:

[0022] One end of the tension spring is fixedly connected to the outer part of the support plate, and the other end of the tension spring is fixedly connected to the outer part of the pawl.

[0023] The utility model has the advantages of the following:

[0024] 1. In the utility model, through the rotation lock tongue, the driven rod drives the trigger plate to move, and the ratchet pawl driven by the tension spring is matched, when the grounding switch is closed in place, the ratchet pawl is clamped into the ratchet tooth groove to realize self-locking, preventing misoperation, when the switch is opened, the ratchet pawl is rotated, only then the ratchet pawl can be released, when the reverse operation, the ratchet wheel idles, avoiding closing under load, and the safety of grounding operation is strengthened.

[0025] 2. In the utility model, the conical surface locking sleeve is fixedly connected outside the fixed shaft, so that the conical surface locking sleeve drives the fixed bolt to move, and the fixed bolt drives the spring washer to move, the conical surface cooperation generates radial holding force, the spring washer provides continuous axial pre-tightening, prevents connection loosening caused by long-term vibration, adapts to multi-shaft diameter wear resistance, does not need to be regularly tightened, and the interlocking reliability is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A three-dimensional schematic view of the interlocking device for the vacuum circuit breaker is provided for the utility model;

[0027] Figure 2 A structure schematic view of the grounding switch of the interlocking device for the vacuum circuit breaker is provided for the utility model;

[0028] Figure 3 A structure schematic view of the connecting rod of the interlocking device for the vacuum circuit breaker is provided for the utility model;

[0029] Figure 4 A Figure 2 Enlarged view of A in the figure;

[0030] Figure 5 A Figure 3 Enlarged view of B in the figure.

[0031] Legend:

[0032] 1, base; 2, device body; 3, disconnecting switch; 4, grounding switch; 5, wiring terminal; 6, driving rod; 7, trigger plate; 8, driven rod; 9, driving wheel; 10, belt; 11, driven wheel; 12, lock tongue; 13, ratchet wheel; 14, support plate; 15, ratchet pawl; 16, follow-up rod; 17, tension spring; 18, fixed shaft; 19, connecting rod; 20, conical surface locking sleeve; 21, fixed bolt; 22, spring washer; 23, connecting ring; 24, connecting plate; 25, link plate; 26, isolation knife. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0034] With reference to Figure 1 , Figure 2 and Figure 4 , the present application provides an embodiment: an interlocking device for a vacuum circuit breaker, comprising a base 1, the upper surface of the base 1 has a raised rib, which enhances the stability of the overall structure and provides a mounting platform for the device body 2 and various components above, the outer part of the base 1 is fixedly connected with the device body 2, the top of the device body 2 is fixedly connected with a plurality of disconnectors 3, the disconnectors 3 are evenly distributed along the top of the device body 2, and the on-off state of the switch can be changed when rotating, the bottom of the device body 2 is fixedly connected with a plurality of grounding switches 4, the grounding switches 4 are flat and in the form of a sheet, arranged at the edge of the bottom of the device body 2, and the outer part of the base 1 is fixedly connected with a wiring terminal 5;

[0035] The wiring terminal 5 is arranged along the side of the base 1, the end of the wire can be fixed in the screw hole by a bolt, realizing the connection of the circuit, the inner part of the base 1 is fixedly connected with a self-locking mechanism, the outer part of the base 1 is fixedly connected with a plurality of anti-loosening mechanisms, the self-locking mechanism comprises a driving rod 6, the outer part of the driving rod 6 is rotatably connected in the inner part of the base 1, the outer part of the driving rod 6 is fixedly connected with a plurality of trigger plates 7, when the driving rod 6 rotates, the trigger plates 7 rotate accordingly, the inner part of the base 1 is rotatably connected with a driven rod 8, the outer part of the driving rod 6 is fixedly connected with a transmission assembly, the outer right side of the driving rod 6 is fixedly connected with a ratchet wheel 13, the ratchet wheel 13 is in the form of a circular wheel, the edge is provided with evenly distributed teeth, one side of the teeth is a vertical surface, and the other side is an inclined surface, which rotates synchronously with the driving rod 6, and the inner part of the base 1 is fixedly connected with a support plate 14;

[0036] The outer part of the support plate 14 is rotatably connected with a pawl 15, which is a sheet structure, one end of which is connected with the support plate 14 through a shaft and can rotate around the shaft, the other end of which is pointed and can be matched with the toothed protrusion of the ratchet wheel 13 to clamp the ratchet wheel 13 and prevent it from reversing, the outer part of the pawl 15 is fixedly connected with a follower rod 16, the outer part of the pawl 15 is provided with a tension spring 17, the transmission assembly includes a driving wheel 9, the outer part of the driving wheel 9 is fixedly connected with the outer part of the driving rod 6, the outer part of the driving wheel 9 is sleeved with a belt 10, the belt 10 is an annular structure, is sleeved in the annular groove of the driving wheel 9 and the driven wheel 11, when the driving wheel 9 rotates, the belt 10 moves synchronously to drive the driven wheel 11 to rotate synchronously, the outer part of the driven rod 8 is fixedly connected with the driven wheel 11, the outer right side of the driven rod 8 is fixedly connected with a lock tongue 12, the outer part of the driven wheel 11 is rotatably connected with the inner part of the base 1;

[0037] With reference to Figure 1 、 Figure 3 and Figure 5 , the anti-loose mechanism includes a fixed shaft 18, the outer part of the fixed shaft 18 is fixedly connected with the outer part of the base 1, the inner part of the fixed shaft 18 is fixedly connected with a connecting rod 19, the connecting rod 19 is a cylindrical rod structure, passes through the center hole of the fixed shaft 18, and extends out of the outer part of the fixed shaft 18 at both ends, a plurality of annular protrusions are arranged on the shaft body for mounting a conical locking sleeve 20 and a connecting ring 23, the outer part of the connecting rod 19 is fixedly connected with a plurality of conical locking sleeves 20, the conical locking sleeve 20 is a circular ring structure, the inner ring is matched with the annular protrusion of the connecting rod 19, the outer ring is conical, the conical inclination angles are uniform, the conical locking sleeve 20 is sleeved at the position close to the fixed shaft 18 of the connecting rod 19 and can move axially with the tightening of the fixed bolt 21, the outer part of the conical locking sleeve 20 is fixedly connected with a plurality of fixed bolts 21, the outer left side of the fixed bolt 21 is fixedly connected with a plurality of spring washers 22;

[0038] The spring washer 22 is a circular ring structure, the cross section is wavy, is sleeved on the threaded section of the fixed bolt 21, is located between the head of the fixed bolt 21 and the conical locking sleeve 20, and is in a slightly compressed state in a natural state, can generate a rebound tension when the fixed bolt 21 is loose, the outer part of the connecting rod 19 is fixedly connected with a plurality of connecting rings 23, the outer part of the connecting ring 23 is fixedly connected with a connecting plate 24, the outer part of the connecting plate 24 is fixedly connected with a link plate 25, the link plate 25 is a rectangular plate structure, is connected perpendicularly with the connecting plate 24, a mounting hole matched with the isolation knife 26 is arranged on the plate body, can swing synchronously with the movement of the connecting plate 24, the outer part of the link plate 25 is fixedly connected with the isolation knife 26, the isolation knife 26 is a flat sheet structure, one end of which is connected with the mounting hole of the link plate 25, the other end of which is blade-shaped and can rotate around the link plate 25, can contact or separate from the contact of the isolation switch 3 when rotating, one end of the tension spring 17 is fixedly connected with the outer part of the support plate 14, the other end of the tension spring 17 is fixedly connected with the outer part of the pawl 15.

[0039] Working principle: by rotating the servo rod 16 is unlocked, while rotating the main rod 6, disconnect switch 3 change on-off state, trigger the main rod 6 around the shaft inside the base 1 rotation, so that the trigger plate 7 with the main rod 6 synchronous rotation, the main rod 6 drive the right side of the ratchet 13 rotation, pawl 15 around the support plate 14 shaft rotation, tension spring 17 is lengthened, in turn, under the action of tension reset, pawl 15 card into the next tooth slot, the main rod 6 rotation, the main wheel 9 synchronous rotation, belt 10 along the main wheel 9 and the driven wheel 11 annular groove movement, drive the driven wheel 11 and the driven rod 8 rotation;

[0040] By tightening the fixed shaft 18 remains fixed, when the external vibration occurs, so that the taper locking sleeve 20 along the connecting rod 19 annular convex axial movement, spring washer 22 is further compressed, so that the connecting ring 23 with the connecting rod 19 fixed, the connecting plate 24 with it, the adapter plate 25 with the connecting plate 24 to keep the position, in turn, so that the isolation knife 26 around the mounting hole of the adapter plate 25 rotation, blade-shaped end with the contact of the disconnect switch 3 or separate, so as to prevent long-term vibration caused by the connection loose, guarantee interlock reliable.

[0041] Finally, it should be noted that: the above only for the preferred embodiments of the present application have, and not for limiting the present application, although the foregoing detailed description of the present application has been made with reference to the foregoing embodiments, for the skilled in the art, it can still be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. An interlocking device for vacuum circuit breakers comprising a base (1), characterized in that: The outside of the base (1) is fixedly connected with the device body (2), the top of the device body (2) is fixedly connected with a plurality of disconnecting switches (3), the bottom of the device body (2) is fixedly connected with a plurality of grounding switches (4), the outside of the base (1) is fixedly connected with a wiring terminal (5), the inside of the base (1) is fixedly connected with a self-locking mechanism, and the outside of the base (1) is fixedly connected with a plurality of anti-loosening mechanisms. The self-locking mechanism comprises a driving rod (6), the outside of the driving rod (6) is rotatably connected in the inside of the base (1), a plurality of trigger plates (7) are fixedly connected to the outside of the driving rod (6), a driven rod (8) is rotatably connected in the inside of the base (1), a transmission assembly is fixedly connected to the outside of the driving rod (6), a ratchet wheel (13) is fixedly connected to the right side of the outside of the driving rod (6), a supporting plate (14) is fixedly connected in the inside of the base (1), a ratchet pawl (15) is rotatably connected to the outside of the supporting plate (14), a follower rod (16) is fixedly connected to the outside of the ratchet pawl (15), and a tension spring (17) is arranged on the outside of the ratchet pawl (15).

2. An interlocking device for vacuum circuit breakers as claimed in claim 1, wherein: The transmission assembly comprises a driving wheel (9), the outside of the driving wheel (9) is fixedly connected to the outside of the driving rod (6), and the outside of the driving wheel (9) is sleeved with a belt (10).

3. An interlock device for a vacuum circuit breaker according to claim 2, characterized in that: The outside of the driven rod (8) is fixedly connected with a driven wheel (11), the right side of the outside of the driven rod (8) is fixedly connected with a lock tongue (12), and the outside of the driven wheel (11) is rotatably connected in the inside of the base (1).

4. An interlock device for a vacuum circuit breaker according to claim 3, characterized in that: The anti-loosening mechanism comprises a fixed shaft (18), the outside of the fixed shaft (18) is fixed to the outside of the base (1), and the inside of the fixed shaft (18) is fixedly connected with a connecting rod (19).

5. An interlock device for a vacuum circuit breaker according to claim 4, characterized in that: The outside of the connecting rod (19) is fixedly connected with a plurality of conical surface locking sleeves (20), and the outside of the conical surface locking sleeve (20) is fixedly connected with a plurality of fixed bolts (21).

6. An interlock device for a vacuum circuit breaker according to claim 5, characterized in that: The outside left side of the fixed bolt (21) is fixedly connected with a plurality of spring washers (22), and the outside of the connecting rod (19) is fixedly connected with a plurality of connecting rings (23).

7. An interlock device for a vacuum circuit breaker according to claim 6, characterized in that: The outside of the connecting ring (23) is fixedly connected with a connecting plate (24), the outside of the connecting plate (24) is fixedly connected with a linking plate (25), the outside of the linking plate (25) is fixedly connected with an isolation knife (26).

8. An interlocking device for vacuum circuit breakers as claimed in claim 1, wherein: One end of the tension spring (17) is fixedly connected to the outside of the supporting plate (14), and the other end of the tension spring (17) is fixedly connected to the outside of the ratchet pawl (15).

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