Special cable compartment mechanical interlocking device for gas insulated switchgear

Abstract

The invention discloses a special cable compartment mechanical interlocking device for a gas insulated switchgear, which comprises an interlocking box, a supporting plate I is welded on the bottom wall of the interlocking box, a supporting plate II is welded on the outer side wall of the interlocking box, an unlocking shaft mechanism is mounted at the lower part of the interlocking box, and a reverse locking shaft mechanism is mounted at the upper part of the interlocking box. An unlocking plate mechanism is installed between the unlocking shaft mechanism and the anti-locking shaft mechanism, and a lock shaft is installed in the center of the bottom wall of the interlocking box. The mechanical interlocking device is reasonable in structural design, can realize mechanical interlocking among three stations, a circuit breaker and a cable compartment door plate, has the characteristics of pure mechanical performance, low installation cost, convenience in installation and the like, and is suitable for popularization and application.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical interlocking devices, and in particular to a mechanical interlocking device for a cable compartment dedicated to an inflatable cabinet. Background Art

[0002] With the continuous advancement of science and technology, human beings have higher and higher requirements for power distribution products. Energy saving, intelligence, maintenance-free, high reliability and low cost have become the development direction of switchgear. In this context, inflatable cabinets have become one of the main development directions. When the existing inflatable cabinet is in the third position and the circuit breaker is not in the grounding position, the cable compartment door can be opened, resulting in a series of safety problems caused by the lack of a high-reliability mechanical interlocking device.

[0003] Currently, the existing inflatable cabinets mostly use electrical interlocks or program locks in the cable compartment. The electrical interlock requires a separate power supply circuit and is independent of other electrical circuits. Although it is easier to achieve the interlocking reaction between the cable compartment and the three-station and circuit breaker, after the electrical interlock circuit is powered off, the interlocking relationship between the cable compartment and the three-station and circuit breaker will become invalid, resulting in uninformed operation, thereby causing safety accidents. The program lock has high installation and design costs and is difficult to debug. Improper use may cause program instability or deadlock.

[0004] To this end, the present invention proposes a mechanical interlocking device for a cable compartment dedicated to an inflatable cabinet. Summary of the invention

[0005] The purpose of the present invention is to provide a mechanical interlocking device for a cable compartment dedicated to an inflatable cabinet, so as to overcome the technical problems existing in the prior art.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention provides the following technical solutions:

[0007] A mechanical interlocking device for a cable compartment dedicated to an inflatable cabinet comprises an interlocking box, a bottom wall of the interlocking box is welded with a first support plate, an outer side wall of the interlocking box is welded with a second support plate, an unlocking shaft mechanism is installed at the lower part of the interlocking box, an anti-locking shaft mechanism is installed at the upper part of the interlocking box, an unlocking plate mechanism is installed between the unlocking shaft mechanism and the anti-locking shaft mechanism, and a locking shaft is installed at the center of the bottom wall of the interlocking box.

[0008] Preferably, in a mechanical interlocking device for a cable compartment dedicated to an inflatable cabinet, the unlocking shaft mechanism includes an unlocking shaft passing through an interlocking box and a support plate, one end of the unlocking shaft is fixedly connected to an unlocking handle, the other end of the unlocking shaft is connected to a crank arm, a baffle is connected to the middle of the outer wall of the unlocking shaft, two torsion springs and a sleeve are installed between the crank arm and the interlocking box, and two screws are installed on the crank arm.

[0009] Preferably, in a mechanical interlocking device for a cable compartment dedicated to an inflatable cabinet, the anti-locking shaft mechanism includes a square shaft passing through an interlocking box, the circular end of the square shaft is fixedly connected with a bent plate 2, a screw 1 is installed on the upper part of the bent plate 2, and an open retaining ring is installed in the limit groove of the square shaft.

[0010] Preferably, in a mechanical interlocking device for a cable compartment dedicated to an inflatable cabinet, the unlocking plate mechanism includes a bent plate one fixedly connected to an unlocking shaft, a shaft is installed in the bent plate one, a shift plate and a torsion spring one are connected to the outer wall of the shaft, and an elastic cylindrical pin is installed on the shift plate.

[0011] Preferably, in a mechanical interlocking device for a cable compartment dedicated to an inflatable cabinet, the interlocking box is formed by bending a steel plate, an unlocking shaft mounting hole is provided at the lower portion of the side wall of the interlocking box, a square shaft mounting hole is provided at the upper portion of the side wall of the interlocking box, and bolts are installed on the outer side wall of the interlocking box, and two bolts are provided and are located on the upper and lower sides of the crank arm.

[0012] Preferably, in a mechanical interlocking device for a cable compartment of an inflatable cabinet, a return spring is sleeved on the outside of the square shaft, one end of the return spring is fixedly connected to the inner wall of the interlocking box, and both ends of the return spring and the torsion spring are connected with flat washers.

[0013] Preferably, in a mechanical interlocking device for a cable compartment dedicated to an inflatable cabinet, a lock shaft is installed at the bottom center of the interlocking box, a reset spring 2 is sleeved on the outside of the lock shaft, a cotter pin is installed at the circular end of the lock shaft, and a screw 3 is installed at the square end of the lock shaft.

[0014] Preferably, in a mechanical interlocking device for a cable compartment dedicated to an inflatable cabinet, a bent plate three is welded to the outer wall of the support plate one, a bent plate four is welded to the top of the interlocking box, and hexagonal nuts are welded to the horizontal portion of the bent plate three and the vertical portion of the bent plate four.

[0015] Preferably, in a mechanical interlocking device for a cable compartment of an inflatable cabinet, a cable compartment door panel is detachably mounted between the second support plate and the unlocking handle.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention adopts an integrated design, which consists of an interlocking box, an unlocking shaft mechanism, an anti-locking shaft mechanism, an unlocking plate mechanism, a locking shaft and other components. It can form a complete interlocking device, and can realize mechanical interlocking between three workstations, circuit breakers and cable compartment door panels. It has the characteristics of pure mechanical performance, low installation cost, and convenient installation, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a front structural schematic diagram of the present invention;

[0021] Figure 3 It is a side view structural schematic diagram of the present invention;

[0022] Figure 4 This is a front view of the cable compartment door panel installed in the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the square shaft in the present invention;

[0024] Figure 6 It is a structural schematic diagram of the unlocking shaft in the present invention;

[0025] Figure 7 It is a structural schematic diagram of the unlocking plate mechanism in the present invention;

[0026] Figure 8 It is a schematic diagram of the side structure of the cable compartment door panel in the present invention.

[0027] In the figure: 1. interlock box; 2. unlocking shaft; 3. unlocking handle; 4. crank arm; 5. baffle; 6. sleeve; 7. bent plate 1; 8. dial plate; 9. shaft; 10. torsion spring 1; 11. elastic cylindrical pin; 12. lock shaft; 13. support plate 1; 14. square shaft; 15. bent plate 2; 16. screw 1; 17. open retaining ring; 18. flat washer; 19. bent plate 3; 20. bent plate 4; 21. hexagonal nut; 22. reset spring 1; 23. open pin; 24. support plate 2; 25. cable compartment door; 26. bolt; 27. torsion spring 2; 28. reset spring 2; 29. ​​screw 2; 30. screw 3. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-8As shown, this embodiment is a mechanical interlocking device for a cable compartment dedicated to an inflatable cabinet, comprising an interlocking box 1, a bottom wall of the interlocking box 1 is welded with a support plate 13, an outer side wall of the interlocking box 1 is welded with a support plate 24, an unlocking shaft mechanism is installed at the lower part of the interlocking box 1, an anti-locking shaft mechanism is installed at the upper part of the interlocking box 1, an unlocking plate mechanism is installed between the unlocking shaft mechanism and the anti-locking shaft mechanism, and a locking shaft 12 is installed at the center of the bottom wall of the interlocking box 1.

[0030] The unlocking shaft mechanism includes an unlocking shaft 2 that passes through the interlocking box 1 and the support plate 24, one end of the unlocking shaft 2 is fixedly connected to an unlocking handle 3, the other end of the unlocking shaft 2 is connected to a crank arm 4, the unlocking handle 3 and the crank arm 4 rotate at the same angle, a baffle 5 is connected to the middle of the outer wall of the unlocking shaft 2, a torsion spring 27 and a sleeve 6 are installed between the crank arm 4 and the interlocking box 1, so that the unlocking shaft 2 can reset itself, and a screw 29 is installed on the crank arm 4.

[0031] The anti-locking shaft mechanism includes a square shaft 14 that passes through the interlocking box 1 , and a second bent plate 15 is fixedly connected to the circular end of the square shaft 14 . A screw 16 is installed on the upper part of the second bent plate 15 . An open retaining ring 17 is installed in the limiting groove of the square shaft 14 .

[0032] The unlocking plate mechanism includes a bent plate 7 fixedly connected to the unlocking shaft 2, a shaft 9 is installed in the bent plate 7, the outer wall of the shaft 9 is connected to a paddle plate 8 and a torsion spring 10, an elastic cylindrical pin 11 is installed on the paddle plate 8, the paddle plate 8 has a certain rotation and reset ability, and the elastic cylindrical pin 11 is installed on the paddle plate 8 to achieve the purpose of limiting the torsion spring 10.

[0033] The interlock box 1 is formed by bending a steel plate, an unlocking shaft mounting hole is provided at the lower portion of the side wall of the interlock box 1, and a square shaft mounting hole is provided at the upper portion of the side wall of the interlock box 1 to ensure that the unlocking shaft 2 and the square shaft 14 move smoothly and without stagnation during operation. Bolts 26 are installed on the outer side wall of the interlock box 1, and two bolts 26 are provided and located on the upper and lower sides of the crank arm 4. The bolts 26 are installed to limit the torsion spring 27.

[0034] The outer sleeve of the square shaft 14 is provided with a return spring 1 22 , one end of the return spring 22 is fixedly connected to the inner wall of the interlock box 1 , and the ends of the return spring 1 22 and the torsion spring 27 are both connected with flat washers 18 .

[0035] A lock shaft 12 is installed at the bottom center of the interlock box 1, and a return spring 28 is sleeved on the outside of the lock shaft 12. A cotter pin 23 is installed at the circular end of the lock shaft 12 to limit the position of the lock shaft 12, and a screw 30 is installed at the square end of the lock shaft 12.

[0036] A bent plate 3 19 is welded to the outer wall of the support plate 13 , a bent plate 4 20 is welded to the top of the interlocking box 1 , and hexagonal nuts 21 are welded to the horizontal portion of the bent plate 3 19 and the vertical portion of the bent plate 4 20 .

[0037] A cable compartment door panel 25 is detachably mounted between the second support panel 24 and the unlocking handle 3 .

[0038] The specific implementation of this embodiment is as follows:

[0039] In this embodiment, the circuit breaker connecting soft shaft is connected to screw No. 29, the three-station grounding connecting soft shaft is connected to screw No. 30, and the interlocking device is in the locked state, and the cable compartment door panel 25 is in the closed state: when the three-station is not in the grounding state, the three-station grounding soft shaft has no force on screw No. 30, and the lock shaft 12 locks the unlocking shaft device under the elastic force of the reset spring No. 28, wherein the baffle 5 in the unlocking shaft mechanism will be blocked by the lock shaft 12 so that the unlocking shaft device cannot reach the unlocking position; when the circuit breaker is in the open state, the circuit breaker connecting soft shaft is stressed, and at the same time, the circuit breaker connecting soft shaft is connected to screw No. 29, which will cause screw No. 29 to be stressed, lock the unlocking shaft device, and make the unlocking shaft device unable to rotate;

[0040] When the interlocking device is unlocked: the third station is in the grounding state and the circuit breaker is in the closed position; the third station grounding connection soft shaft will cause the screw three 30 to be stressed, pulling the lock shaft 12, and the reset spring two 28 will be elastically deformed and compressed; the circuit breaker connection soft shaft is not subjected to force, and the unlocking screw two 29; at this time, the unlocking shaft device rotates in the unlocking position according to the rotation direction under the action of manpower, and the torsion spring two 27 is elastically deformed. The dial plate 8 will rotate with the unlocking shaft 2 through the action of the torsion spring one 10 and the bent plate one 7 to lock the unlocking shaft mechanism at a certain angle, and the cable compartment door panel 25 will be removed;

[0041] When the cable compartment door plate 25 is removed, the anti-locking shaft mechanism moves the square shaft 14 outward in a straight line under the elastic force of the reset spring 22; during the straight line movement of the square shaft 14, the dial plate 8 in the unlocking plate mechanism will slide into the movement groove on the square shaft 14, and the square shaft 14 will finally stop moving by the outer opening retaining ring 17 of the interlocking box 1, and the screw 16 will lock the circuit breaker in the open position through the connected flexible shaft, so that the circuit breaker cannot be opened;

[0042] During the installation of the cable compartment door panel 25, the square shaft 14 is subjected to force, causing the reset spring 1 22 to undergo elastic deformation and be compressed. The unlocking plate mechanism will follow the movement groove trajectory on the square shaft 14 to avoid the restriction of the square shaft 14, and the elastic force released by the torsion spring 2 27 will drive the unlocking shaft mechanism to reset, and finally lock the cable compartment door panel 25.

[0043] After the unlocking shaft mechanism is reset, the screw 16 is not subjected to the force of the reset spring 1 22 to unlock the flexible shaft connected to the screw 16, and the circuit breaker and the three-station can operate normally. After the three-station is grounded, the lock shaft 12 will lock the unlocking mechanism under the elastic force of the reset spring 28.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0045] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A mechanical interlocking device for a cable compartment of an inflatable cabinet, comprising an interlocking box (1), characterized in that: The bottom wall of the interlock box (1) is welded with a support plate 1 (13), the outer side wall of the interlock box (1) is welded with a support plate 2 (24), the lower part of the interlock box (1) is installed with an unlocking shaft mechanism, the upper part of the interlock box (1) is installed with an anti-locking shaft mechanism, an unlocking plate mechanism is installed between the unlocking shaft mechanism and the anti-locking shaft mechanism, and a locking shaft (12) is installed at the center of the bottom wall of the interlock box (1).

2. A mechanical interlocking device for a cable compartment of an inflatable cabinet according to claim 1, characterized in that: The unlocking shaft mechanism comprises an unlocking shaft (2) penetrating the interlocking box (1) and the support plate (24); one end of the unlocking shaft (2) is fixedly connected to an unlocking handle (3); the other end of the unlocking shaft (2) is connected to a crank arm (4); a baffle (5) is connected to the middle of the outer wall of the unlocking shaft (2); two torsion springs (27) and a sleeve (6) are installed between the crank arm (4) and the interlocking box (1); and two screws (29) are installed on the crank arm (4).

3. A mechanical interlocking device for a cable compartment of an inflatable cabinet according to claim 2, characterized in that: The anti-locking shaft mechanism comprises a square shaft (14) penetrating the interlocking box (1), the circular end of the square shaft (14) is fixedly connected with a bent plate 2 (15), a screw 1 (16) is installed on the upper part of the bent plate 2 (15), and an open retaining ring (17) is installed in the limiting groove of the square shaft (14).

4. A mechanical interlocking device for a cable compartment of an inflatable cabinet according to claim 1, characterized in that: The unlocking plate mechanism comprises a bent plate (7) fixedly connected to the unlocking shaft (2), a shaft (9) being installed in the bent plate (7), a shifting plate (8) and a torsion spring (10) being connected to the outer wall of the shaft (9), and an elastic cylindrical pin (11) being installed on the shifting plate (8).

5. The mechanical interlocking device for a cable compartment of an inflatable cabinet according to claim 2 is characterized in that: The interlock box (1) is formed by bending a steel plate, an unlocking shaft mounting hole is provided at the lower portion of the side wall of the interlock box (1), a square shaft mounting hole is provided at the upper portion of the side wall of the interlock box (1), and bolts (26) are installed on the outer side wall of the interlock box (1), two bolts (26) are provided and are located on the upper and lower sides of the crank arm (4).

6. A mechanical interlocking device for a cable compartment of an inflatable cabinet according to claim 3, characterized in that: The outer sleeve of the square shaft (14) is provided with a return spring (22), one end of which is fixedly connected to the inner wall of the interlocking box (1), and the ends of the return spring (22) and the torsion spring (27) are both connected with flat washers (18).

7. The mechanical interlocking device for a cable compartment of an inflatable cabinet according to claim 1 is characterized in that: A lock shaft (12) is installed at the bottom center of the interlock box (1), and a second return spring (28) is sleeved on the outside of the lock shaft (12). A cotter pin (23) is installed at the circular end of the lock shaft (12), and a third screw (30) is installed at the square end of the lock shaft (12).

8. The mechanical interlocking device for a cable compartment of an inflatable cabinet according to claim 1 is characterized in that: The outer wall of the support plate one (13) is welded with a bent plate three (19), the top of the interlocking box (1) is welded with a bent plate four (20), and the horizontal part of the bent plate three (19) and the vertical part of the bent plate four (20) are both welded with hexagonal nuts (21).

9. The mechanical interlocking device for a cable compartment of an inflatable cabinet according to claim 1 is characterized in that: A cable compartment door panel (25) is detachably mounted between the second support panel (24) and the unlocking handle (3).

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