Interlocking device of high-voltage switch cabinet

Abstract

The utility model discloses a high-voltage switch cabinet interlocking device which comprises a high-voltage switch cabinet, an isolating switch, a circuit breaker, an isolating switch interlocking mechanism and a cable chamber door interlocking mechanism, the isolating switch and the circuit breaker are arranged in the high-voltage switch cabinet, and the isolating switch interlocking mechanism is arranged on the isolating switch. The disconnecting switch interlocking mechanism controllably ascends under the action of the circuit breaker to limit opening and closing of the disconnecting switch, the cable chamber door interlocking mechanism is arranged at the position of the circuit breaker, the cable chamber door interlocking mechanism automatically relieves interlocking of a cable chamber door after the disconnecting switch is grounded, and the cable chamber door can be opened with one hand. The interlocking device has the advantages that the disconnecting switch interlocking mechanism and the cable chamber door interlocking mechanism are matched with the disconnecting switch and the circuit breaker to control opening and closing of the circuit breaker, the cable chamber door is interlocked through mutual interlocking between the disconnecting switch interlocking mechanism and the cable chamber door interlocking mechanism, the structure is simple, stability is high, the number of self-made sheet metal parts is small, machining procedures are reduced, and cost is reduced. And the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a high voltage switch cabinet interlocking device. BACKGROUND

[0002] The high voltage switch cabinet is an electric appliance used in the power system, and its voltage level is between 3.6kV and 550kV. It mainly includes high voltage disconnector and grounding switch, high voltage load switch, high voltage automatic reclosing and sectionalizer, high voltage operating mechanism, high voltage explosion-proof distribution device, etc. The switch cabinet has the functions of overhead incoming and outgoing line, cable incoming and outgoing line, bus tie, etc. and is widely used in power plants, substations, petroleum and chemical industry, metallurgy and steel rolling, light industry and textile, factory and mine enterprises, residential areas, high-rise buildings, etc.

[0003] In order to ensure the safety and reliability of operation, the high voltage switch cabinet also has the "five prevention" function, i.e. preventing closing with load, preventing closing with grounding wire, preventing mistakenly entering the live interval, preventing closing with grounding wire with load, and preventing closing with load and pulling the knife switch.

[0004] At present, the high voltage switch cabinet transmits the opening and closing state of the circuit breaker through the self-made sheet metal part plus spring mechanism between the isolation mechanism and the circuit breaker mechanism, so as to realize the five-prevention mechanical interlocking. This interlocking mode has many drawbacks. The user has to operate on site, and the interlocking mode needs to be operated with both hands. One hand has to continuously press the interlocking mechanism to unlock the disconnector operating mechanism, and the other hand can only operate the disconnector opening and closing. The mechanical structure is complex, and the stability is low during operation. Moreover, the complex structure will lead to complicated sheet metal processing in the workshop, consume a lot of time and manpower, and increase the cost of raw materials and production cost of enterprises. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is the complex five-prevention mechanical interlocking structure of the existing high voltage switch cabinet and the high production cost mentioned in the background.

[0006] In order to solve the above technical problem, a high voltage switch cabinet interlocking device is provided. The technical scheme is as follows: a high voltage switch cabinet interlocking device, comprising a high voltage switch cabinet, a disconnector and a circuit breaker, the disconnector and the circuit breaker being arranged in the high voltage switch cabinet, characterized in that: it further comprises a disconnector interlocking mechanism and a cable chamber door interlocking mechanism, the disconnector interlocking mechanism being arranged on the disconnector and being movably connected with the circuit breaker, the disconnector interlocking mechanism being controllably lifted under the action of the circuit breaker to limit the opening and closing of the disconnector, the cable chamber door interlocking mechanism being arranged at the circuit breaker and being movably connected with the disconnector, the cable chamber door interlocking mechanism being automatically unlocked for the cable chamber door in the high voltage switch cabinet after the disconnector is grounded, and the cable chamber door can be opened by single-handed operation.

[0007] The utility model discloses an improved technical scheme, and the isolating switch interlocking mechanism includes the isolation operation empty baffle and the circuit breaker interlocking slide plate, the circuit breaker interlocking slide plate is movably arranged on the circuit breaker, and one end of the isolation operation empty baffle is movably arranged on the isolating switch, and the other end is connected with the circuit breaker interlocking slide plate, the circuit breaker interlocking slide plate is lifted under the action of the circuit breaker and is limited to the isolating switch opening and closing, and the setting of the isolation operation empty baffle makes the operating hole be blocked by the isolation operation empty baffle when the circuit breaker closing, and the isolating switch grounding cannot be operated, preventing the closing with the grounding wire.

[0008] The utility model discloses an improved technical scheme, and the first baffle and the second baffle are arranged on the left and right of the isolation operation empty baffle, the first baffle and the second baffle are blocked at the isolation operation shaft and the grounding operation shaft of the isolating switch after the isolation operation empty baffle is lifted, and the first baffle and the second baffle make the first baffle and the second baffle can block the operating hole of the isolating switch when the circuit breaker closing, and the isolating switch grounding cannot be operated, preventing the closing with the grounding wire.

[0009] The utility model discloses an improved technical scheme, and the first limiting plate is arranged on one side below the circuit breaker interlocking slide plate, the first limiting plate is limited to the cable chamber door interlocking mechanism before the circuit breaker interlocking slide plate is lifted, prevents the cable chamber door of high voltage switch cabinet opening before grounding, and such setting makes the cable chamber door can be operated to open only after the isolating switch is in the grounding state.

[0010] The utility model discloses an improved technical scheme, and the cable chamber door interlocking mechanism includes the isolation grounding operation connecting plate and the circuit breaker connecting component, one end of the isolation grounding operation connecting plate is arranged on the isolating switch, and the other end is connected with the circuit breaker connecting component, the circuit breaker connecting component is arranged on the circuit breaker, and the circuit breaker connecting component is connected with the cable chamber door through the cable chamber door hard interlocking lever, after the isolating switch grounding, the circuit breaker connecting component is automatically lifted and drives the cable chamber door hard interlocking lever to move and opens the cable chamber door, and the setting of the cable chamber door interlocking mechanism facilitates the movement of the cable chamber door hard interlocking lever and opens the cable chamber door, is convenient to use, and single hand can operate, avoids the operation of both hands.

[0011] The utility model discloses an improved technical scheme, and the L-shaped connecting plate is arranged on the isolation grounding operation connecting plate, the L-shaped connecting plate is movably arranged on the isolating switch through the reset spring, and the upper end of the L-shaped connecting plate is in contact with the grounding operation shaft swing arm on the grounding operation shaft in the isolating switch, after the L-shaped connecting plate and the grounding operation shaft swing arm are out of contact, the isolation grounding operation connecting plate is lifted under the action of the reset spring, and the setting of the reset spring makes the reset spring can drive the cable chamber door interlocking mechanism to move after the isolating switch grounding, and the opening of the cable chamber door is facilitated, and it is convenient to use.

[0012] The circuit breaker connecting assembly comprises a circuit breaker interlocking plate and a circuit breaker interlocking baffle, the circuit breaker interlocking plate is movably arranged on the circuit breaker and is connected with the isolation ground operation connecting plate at one end, the circuit breaker interlocking plate moves along with the isolation ground operation connecting plate, the circuit breaker interlocking baffle is hingedly connected to the circuit breaker interlocking plate at one end, the circuit breaker interlocking baffle rotates along the hinge when the circuit breaker interlocking plate moves upwards, and the circuit breaker connecting assembly is arranged so that the isolation operation empty baffle moves and the operating hole of the isolating switch is shielded before the cable chamber door can be opened, thereby improving safety.

[0013] The second limiting plate is arranged on one side of the circuit breaker interlocking baffle, cooperates with the first limiting plate on the circuit breaker interlocking slide plate, and prevents the circuit breaker interlocking baffle from rotating, so that the isolation operation empty baffle can shield the operating hole of the isolating switch when the cable chamber door is opened, and the isolating switch cannot be operated at this time, thereby preventing the closing of the ground wire.

[0014] The limiting foot is arranged at the lower end of the circuit breaker interlocking plate, cooperates with the circuit breaker tripping button, and prevents the circuit breaker from tripping when the cable chamber door is opened, thereby improving safety and preventing the equipment from being powered on when the cable chamber door is in the open state.

[0015] The utility model has the beneficial effects compared with prior art:

[0016] The technical scheme of the utility model cooperates the isolating switch interlocking mechanism and the cable chamber door interlocking mechanism with the isolating switch and the circuit breaker in the high-voltage switch cabinet, controls the tripping and closing of the circuit breaker, cooperates the isolating switch interlocking mechanism and the cable chamber door interlocking mechanism, realizes the interlocking of the cabinet cable chamber door, and is convenient to use.

[0017] The isolating switch interlocking mechanism and the cable chamber door interlocking mechanism have simple structure, high stability, few self-made sheet metal parts, reduced complicated sheet metal part processing procedures in the workshop, reduced labor cost and raw material cost, improved economic benefit of enterprises, reduced fault risk caused by complex structure, ensured reliable operation of the environmental protection cabinet, and can be operated by one hand, and is convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model is a three-dimensional schematic Figure 1 (including high-voltage switch cabinet);

[0019] Figure 2 The utility model is a three-dimensional schematic Figure 2 (not including high-voltage switch cabinet);

[0020] Figure 3 is a sectional view of the isolating switch mechanism;

[0021] Figure 4 is an exploded view of the isolating switch mechanism;

[0022] Figure 5 is a sectional view of the cable chamber door interlocking mechanism;

[0023] Figure 6 is an exploded view of the cable chamber door interlocking mechanism;

[0024] Figure 7 is a sectional view of the circuit breaker connecting assembly;

[0025] Figure 8 is an exploded view of the circuit breaker connecting assembly;

[0026] Figure 9 is a sectional view of the cable chamber door after being opened according to the present application;

[0027] Figure 10 is a front view of the cable chamber door after being opened according to the present application;

[0028] Figure 11 is Figure 10 is an enlarged view of A in FIG. 5;

[0029] BRIEF DESCRIPTION OF THE DRAWINGS: 1 - high voltage switch cabinet, 11 - cable chamber door, 12 - U-shaped fixing clamp, 13 - cable chamber door hard interlocking rod, 2 - isolating switch, 21 - isolating operation shaft, 22 - grounding operation shaft, 23 - grounding operation shaft swing arm, 3 - circuit breaker, 31 - opening button, 32 - closing button, 33 - L-shaped limiting clamp, 34 - circuit breaker rotating shaft, 35 - circuit breaker swing arm, 4 - isolating switch interlocking mechanism, 41 - isolating operation empty stop plate, 42 - circuit breaker interlocking slide plate, 43 - first stop piece, 44 - second stop piece, 45 - guide hole, 46 - slide plate supporting plate, 47 - first limiting plate, 5 - cable chamber door interlocking mechanism, 51 - isolating and grounding operation connecting plate, 52 - L-shaped connecting plate, 53 - Z-shaped mounting clamp, 54 - reset spring mounting hole, 55 - reset spring fixing rod, 56 - reset spring, 6 - circuit breaker connecting assembly, 61 - circuit breaker interlocking plate, 62 - circuit breaker interlocking stop plate, 63 - limiting foot, 64 - circuit breaker operation interlocking guide plate, 65 - travel switch contact plate, 66 - cable chamber door electrical interlocking, 67 - travel switch, 68 - guide clamp, 69 - second limiting plate. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described in detail below with reference to the accompanying drawings. Figures 1-11 The technical solutions in the embodiments of the present application will be described in detail below with reference to the accompanying drawings. EMBODIMENT

[0031] AsFigure 1 、 2 and 10, a high-voltage switch cabinet interlocking device, comprising a high-voltage switch cabinet 1, a disconnector 2, a circuit breaker 3, a disconnector interlocking mechanism 4 and a cable chamber door interlocking mechanism 5, wherein the disconnector 2 and the circuit breaker 3 are installed in the high-voltage switch cabinet 1, the disconnector interlocking mechanism 4 is installed on the disconnector 2, and the cable chamber door interlocking mechanism 5 is installed on the circuit breaker 3; the cable chamber door interlocking mechanism 5 automatically releases the interlocking of the cable chamber door 11 in the high-voltage switch cabinet 1 after the disconnector 2 is grounded, and the cable chamber door 11 can be opened by single-handed operation.

[0032] The main function of the circuit breaker 3 is to cut off and connect the load circuit, and the main function of the disconnector 2 is to isolate the power supply, ensure the safety of the maintenance work, and provide an obvious disconnection point to protect the personal safety of the maintenance personnel; the disconnector 2 and the circuit breaker 3 are existing devices and can be directly used, and the circuit breaker 3 is preferably a full-insulated medium-voltage switch device circuit breaker gas tank of the existing model KN-V-12 / 630-20, and the disconnector 2 is preferably a full-insulated medium-voltage switch device load switch gas tank of the existing model KN-C-12 / 630-20.

[0033] The main function of the disconnector interlocking mechanism 4 is that when the circuit breaker is closed, the operation hole of the disconnector 2 is blocked by the isolation operation blocking plate 41 in the disconnector interlocking mechanism 4, so that the disconnector 2 cannot be operated to be grounded, thereby preventing the circuit breaker from being closed with the grounding wire, and the disconnector interlocking mechanism 4 can also cooperate with the circuit breaker connecting assembly 6 in the cable chamber door interlocking mechanism 5, so that only when the disconnector 2 is in the grounded state and cannot be operated, the cable chamber door interlocking mechanism 5 can be operated to open the cable chamber door 11.

[0034] The main function of the cable chamber door interlocking mechanism 5 is to open the cable chamber door 11 after the disconnector 2 is in the grounded state, and the structure is simple and convenient to use.

[0035] As shown in Figure 2 、 3 , 4 and 9, the disconnector interlocking mechanism 4 comprises an isolation operation blocking plate 41 and a circuit breaker interlocking sliding plate 42, the isolation operation blocking plate 41 and the circuit breaker interlocking sliding plate 42 are connected by screws, the isolation operation blocking plate 41 is installed on the outer side of the disconnector 2, and the circuit breaker interlocking sliding plate 42 is moved up and down to block the on-off and grounding knife operation hole on the disconnector 2.

[0036] The isolation operation empty baffle 41 is an "F" shaped metal sheet made of stainless steel. In order to facilitate the installation of the isolation operation empty baffle 41, a long circular hole is vertically formed on the horizontal plate of the isolation operation empty baffle 41, which is named as a guide hole 45. A guide screw is fixed on the disconnecting switch 2 corresponding to the guide hole 45. The circuit breaker interlocking slide plate 42 is installed on the disconnecting switch 2 through the guide hole 45. The up and down movement of the circuit breaker interlocking slide plate 42 can drive the isolation operation empty baffle 41 to move up and down along the guide hole 45.

[0037] After the grounding of the disconnecting switch 2, in order to prevent the misoperation of the disconnecting switch 2, a rectangular baffle is arranged on the horizontal plate at the upper end of the isolation operation empty baffle 41. The left baffle is named as a second baffle 44, and the right baffle is named as a first baffle 43. The first baffle 43 corresponds to the isolation operation shaft 21 of the disconnecting switch 2, and the second baffle 44 corresponds to the grounding operation shaft 22 of the disconnecting switch 2. After the grounding of the disconnecting switch 2, the isolation operation empty baffle 41 moves up along the disconnecting switch 2 under the action of the circuit breaker interlocking slide plate 42, and shields the isolation operation shaft 21 and the grounding operation shaft 22, thereby completing the shielding of the on-off operation hole of the disconnecting switch 2 and preventing the misoperation of the disconnecting switch 2 after grounding.

[0038] Definition: In the embodiment, the ground is taken as the reference, the high-voltage switch cabinet 1 is placed on the ground, the direction from the ground to the high-voltage switch cabinet 1 is taken as the upward direction, and the direction from the high-voltage switch cabinet 1 to the ground is taken as the downward direction. The cable chamber door 11 is arranged below the high-voltage switch cabinet 1.

[0039] The circuit breaker interlocking slide plate 42 is a rectangular metal sheet made of stainless steel. The upper end of the circuit breaker interlocking slide plate 42 is connected to the isolation operation empty baffle 41 through a screw. In order to facilitate the installation of the circuit breaker interlocking slide plate 42, two long circular holes are vertically formed on the circuit breaker interlocking slide plate 42, which are named as guide holes 45. Two guide screws are also fixed on the circuit breaker 3 corresponding to the guide holes 45. The guide screws are matched with the guide holes 45, so that the circuit breaker interlocking slide plate 42 moves along the guide holes 45 when moving up and down, and the circuit breaker interlocking slide plate 42 is fixed.

[0040] In order to facilitate the upward movement of the circuit breaker interlocking slide plate 42, a rectangular plate is bent inward at the lower end of the circuit breaker interlocking slide plate 42, which is named as the slide plate support plate 46. The slide plate support plate 46 corresponds to the position of the circuit breaker swing arm 35 on the circuit breaker shaft 34 of the circuit breaker 3. The circuit breaker swing arm 35 is a metal cam. When the disconnecting switch 2 is grounded, the circuit breaker shaft 34 rotates, and the circuit breaker swing arm 35 rotates with the circuit breaker shaft 34. The circuit breaker swing arm 35 contacts the slide plate support plate 46, driving the entire circuit breaker interlocking slide plate 42 to move upward, thereby achieving the shielding of the disconnecting switch 2 and the ground knife operation hole, preventing misoperation on the disconnecting switch 2 after grounding.

[0041] In order to facilitate the downward reset of the circuit breaker interlocking slide plate 42, a spring is hung on the inner side of the circuit breaker interlocking slide plate 42. One end of the spring is hung on the inner side of the circuit breaker interlocking slide plate 42, and the other end is hung on the circuit breaker 3. When the circuit breaker interlocking slide plate 42 moves upward, the spring is compressed under force. When the circuit breaker swing arm 35 is removed from contact, the circuit breaker interlocking slide plate 42 resets and moves downward under the action of the spring.

[0042] In order to facilitate the cooperation between the disconnecting switch interlocking mechanism 4 and the cable chamber door interlocking mechanism 5, so that the cable chamber door interlocking mechanism 5 can only move upward to open the cable chamber door 11 after the disconnecting switch interlocking mechanism 4 moves upward, a rectangular plate is bent inward on the side of the circuit breaker interlocking slide plate 42 in the disconnecting switch interlocking mechanism 4, which is named as the first limiting plate 47. The first limiting plate 47 cooperates with the cable chamber door interlocking mechanism 5. Only when the disconnecting switch interlocking mechanism 4 moves upward and the cooperation between the first limiting plate 47 and the cable chamber door interlocking mechanism 5 is removed, the cable chamber door interlocking mechanism 5 can move upward to open the cable chamber door 11, ensuring safety during construction.

[0043] As shown in Figure 2 , 5 , 6, 7, 8 and 11, the cable chamber door interlocking mechanism 5 includes an isolation grounding operation connecting plate 51 and a circuit breaker connecting assembly 6. One end of the isolation grounding operation connecting plate 51 is arranged on the disconnecting switch 2, and the other end is connected with the circuit breaker connecting assembly 6. The circuit breaker connecting assembly 6 is connected with the cable chamber door 11 through the cable chamber door hard interlocking rod 13.

[0044] The main function of the isolation grounding operation connecting plate 51 is to drive the circuit breaker connecting assembly 6 to move up and down.

[0045] The main function of the circuit breaker connecting assembly 6 is to control the opening of the cable chamber door 11. The upward and downward movement of the circuit breaker connecting assembly 6 can drive the cable chamber door 11 to move up and down, thereby controlling the opening and closing of the cable chamber door 11. The circuit breaker connecting assembly 6 is provided with a second limiting plate 69, which can cooperate with the first limiting plate 47, thereby limiting the upward and downward movement of the isolation grounding operation connecting plate 51, and further limiting the opening and closing of the cable chamber door 11.

[0046] The isolation ground operation connecting plate 51 is a stainless steel plate with "L" cross section, one end of which is installed on the disconnector 2, and the other end is connected to the circuit breaker connecting assembly 6 through a screw.

[0047] In order to facilitate the installation and fixation of the isolation ground operation connecting plate 51 on the disconnector 2, a "Z" shaped card made of a stainless steel plate is fixed on the disconnector 2 by a screw, which is named as Z-shaped installation card 53, and a circular mounting hole is formed on the two parallel vertical plates of the Z-shaped installation card 53, and the shorter vertical plate of the Z-shaped installation card 53 is fixed on the disconnector 2 by a screw.

[0048] On the other vertical plate of the Z-shaped installation card 53, a "U" shaped card made of a stainless steel plate is fixed by a screw, which is named as reset spring installation card 54, and a circular reset spring fixing rod 55 is inserted between the two parallel horizontal plates of the reset spring installation card 54, and a reset spring 56 is sleeved on the reset spring fixing rod 55, and the reset spring 56 is compressed by pulling down the reset spring fixing rod 55.

[0049] On the outside of the reset spring installation card 54, an L-shaped connecting plate 52 is installed, the horizontal plate of the L-shaped connecting plate 52 is connected with the reset spring fixing rod 55, and the vertical plate of the L-shaped connecting plate 52 is connected with the isolation ground operation connecting plate 51, when the L-shaped connecting plate 52 is pressed down, the reset spring fixing rod 55 and the isolation ground operation connecting plate 51 will correspondingly drop, and at this time the reset spring 56 is compressed under force.

[0050] Regarding the installation position of the Z-shaped installation card 53, the Z-shaped installation card 53 is installed below the ground operation shaft 22 of the disconnector 2, in order to facilitate the control of the descent of the isolation ground operation connecting plate 51, a ground operation shaft swing arm 23 is installed on the ground operation shaft 22, which is a cam, when the ground operation shaft 22 rotates, it will correspondingly rotate with the ground operation shaft swing arm 23, through the contact between the ground operation shaft swing arm 23 and the L-shaped connecting plate 52, the descent of the isolation ground operation connecting plate 51 is controlled.

[0051] As shown in Figure 6 , 7 , 8 and 11, the circuit breaker connecting assembly 6 includes a circuit breaker interlocking plate 61 and a circuit breaker interlocking baffle 62, wherein the circuit breaker interlocking plate 61 is slidingly installed on the circuit breaker 3, the circuit breaker interlocking baffle 62 is hinged on the circuit breaker interlocking plate 61, the upward movement of the circuit breaker interlocking plate 61 can drive the cable chamber door hard interlocking rod 13 to move upward, thereby opening the cable chamber door 11, and the circuit breaker interlocking baffle 62 can limit the upward movement of the circuit breaker interlocking plate 61 to prevent the circuit breaker interlocking plate 61 from being mistakenly operated to move upward.

[0052] The circuit breaker interlocking plate 61 is a special-shaped plate punched from a stainless steel sheet. Two large metal plates are folded outward at the upper end of the circuit breaker interlocking plate 61. One end of the isolation ground operating connecting plate 51 is connected to one of the metal plates by a screw, and one end of the cable chamber door hard interlocking rod 13 is fixed to the other metal plate by a screw.

[0053] In order to facilitate the installation of the circuit breaker interlocking plate 61, a mounting plate is fixed to the circuit breaker 3 by a screw. The circuit breaker interlocking plate 61 is connected to the mounting plate through a guide card 68. A long circular guide hole 45 is formed in the circuit breaker interlocking plate 61. The circuit breaker interlocking plate 61 can move up and down along the guide hole 45.

[0054] The guide card 68 is a "U"-shaped metal card. A rectangular protrusion is protruded outward from each end of the two parallel rectangular plates of the guide card 68. The two protrusions are respectively inserted into the guide hole 45 of the circuit breaker interlocking plate 61. The guide card 68 is connected to the mounting plate by a screw, thereby completing the connection between the circuit breaker interlocking plate 61 and the mounting plate. The guide card 68 allows the connected circuit breaker interlocking plate 61 to move up and down along the guide hole 45.

[0055] After the cable chamber door 11 is opened, in order to prevent the circuit breaker 3 from being tripped, a limiting foot 63 is arranged at the lower end of the circuit breaker interlocking plate 61. The limiting foot 63 corresponds to the position of the L-shaped limiting card 33 corresponding to the tripping button 31 of the circuit breaker 3. When the cable chamber door 11 is opened and the circuit breaker interlocking plate 61 moves upward, the limiting foot 63 limits the L-shaped limiting card 33. At this time, the tripping button 31 cannot be operated, ensuring the safety of the construction personnel.

[0056] The circuit breaker interlocking baffle 62 is a fan-shaped metal plate made of a stainless steel sheet. The circuit breaker interlocking baffle 62 is hingedly connected to the guide card 68 by a screw. The circuit breaker interlocking baffle 62 can freely rotate along the hinge. When the circuit breaker 3 is not grounded, in order to prevent the circuit breaker connecting assembly 6 from moving upward to open the cable chamber door 11, a rectangular plate is bent perpendicularly to the circuit breaker interlocking baffle 62 at the left side of the circuit breaker interlocking baffle 62. This rectangular plate is named as a second limiting plate 69. The second limiting plate 69 can cooperate with the first limiting plate 47 on the circuit breaker interlocking slide plate 42 to limit. When the circuit breaker interlocking slide plate 42 does not move upward, the circuit breaker connecting assembly 6 cannot move upward under the limiting of the second limiting plate 69 and the first limiting plate 47. At this time, the cable chamber door 11 cannot be opened, ensuring the safety of the operating personnel.

[0057] A long circular guide plate is hinged on the circuit breaker interlocking baffle 62 and the circuit breaker interlocking plate 61, which is named as circuit breaker operation interlocking guide plate 64. One end of the circuit breaker operation interlocking guide plate 64 is hinged on the circuit breaker interlocking baffle 62 at a lower position, and the other end is hinged on the circuit breaker interlocking plate 61. When the circuit breaker interlocking plate 61 moves upward and the disconnecting switch interlocking mechanism 4 is in the upward moving state, the circuit breaker interlocking baffle 62 rotates along the hinge, and at the same time, the circuit breaker operation interlocking guide plate 64 is rotated. The circuit breaker operation interlocking guide plate 64 moves upward against the circuit breaker interlocking plate 61, and in turn drives the cable chamber door 11 to move upward to open the cable chamber door 11.

[0058] In order to prevent the cable chamber door 11 from being misoperated and to ensure the safety of the operator, the circuit breaker 3 can be electrically closed only after the cable chamber door 11 is closed. In order to ensure that the circuit breaker 3 is electrically closed only after the cable chamber door 11 is correctly closed, a "L" shaped stainless steel plate is fixed on the circuit breaker 3 by screws, which is named as cable chamber door electrical interlocking 66. A travel switch 67 is fixed on the horizontal plate of the cable chamber door electrical interlocking 66 by screws. A rectangular metal plate is provided on the circuit breaker interlocking plate 61 corresponding to the travel switch 67, which is named as travel switch contact plate 65. When the circuit breaker interlocking plate 61 moves downward and the cable chamber door 11 is correctly closed, the travel switch contact plate 65 contacts with the travel switch 67, and at this time, the circuit breaker 3 can be electrically closed.

[0059] Regarding the upward and downward process of the cable chamber door interlocking mechanism 5: under normal conditions, the cable chamber door interlocking mechanism 5 is at the end point of downward movement, at this time, the cable chamber door 11 is in the closed state. The upward movement of the cable chamber door interlocking mechanism 5 is realized by the action force of the reset spring 56 on the L-shaped connecting plate 52, and the upward movement of the isolation grounding operation connecting plate 51 is realized by the reset spring 56. Since the isolation grounding operation connecting plate 51 is connected with the circuit breaker interlocking plate 61, the circuit breaker interlocking plate 61 is driven to move upward.

[0060] When the cable chamber door interlocking mechanism 5 moves downward, the grounding operation shaft 22 needs to be rotated, and in turn, the grounding operation shaft swing arm 23 is rotated. When the grounding operation shaft swing arm 23 is rotated, pressure is applied to the L-shaped connecting plate 52, and the isolation grounding operation connecting plate 51 is driven to move downward. At this time, the reset spring 56 is compressed under force.

[0061] Advantages of the embodiment: simple structure, the cable chamber door 11 in the high-voltage switch cabinet 1 can be interlocked by using the existing isolating switch 2 and circuit breaker 3 and the cooperation of the isolating switch interlocking mechanism 4, the cable chamber door interlocking mechanism 5 and the circuit breaker connecting assembly 6, one hand can control, convenient operation, in addition, the isolating switch interlocking mechanism 4, the cable chamber door interlocking mechanism 5 and the circuit breaker connecting assembly 6 are simple in structure, high in stability, small in number of self-made sheet metal parts, reduce the complicated machining process of sheet metal parts in the workshop, reduce the labor cost and the raw material cost, improve the economic benefit of the enterprise, the simple structure also reduces the fault risk caused by the complex structure, ensures the reliable operation of the environmental protection cabinet, and is convenient to use.

[0062] The above embodiments only illustrate the technical idea of the present application, and cannot limit the protection scope of the present application. Any modification made on the basis of the technical scheme according to the technical idea of the present application falls within the protection scope of the present application.

Claims

1. A high-voltage switchgear interlocking device, comprising a high-voltage switchgear (1), a disconnector (2) and a circuit breaker (3), the disconnector (2) and the circuit breaker (3) being arranged in the high-voltage switchgear (1), characterized in that: The high-voltage switch cabinet (1) further comprises an isolating switch interlocking mechanism (4) and a cable chamber door interlocking mechanism (5), the isolating switch interlocking mechanism (4) is arranged on the isolating switch (2) and is movably connected with the circuit breaker (3), the isolating switch interlocking mechanism (4) is controlled to rise under the action of the circuit breaker (3) to limit the opening and closing of the isolating switch (2), the cable chamber door interlocking mechanism (5) is arranged at the circuit breaker (3) and is movably connected with the isolating switch (2), the cable chamber door interlocking mechanism (5) is automatically released from the interlocking of the cable chamber door (11) in the high-voltage switch cabinet (1) after the isolating switch (2) is grounded, and the cable chamber door (11) can be opened by single-handed operation.

2. The high voltage switchgear interlocking device according to claim 1, characterized in that: The isolating switch interlocking mechanism (4) comprises an isolating operation empty baffle (41) and a circuit breaker interlocking sliding plate (42), the circuit breaker interlocking sliding plate (42) is movably arranged on the circuit breaker (3), one end of the isolating operation empty baffle (41) is movably arranged on the isolating switch (2), and the other end is connected with the circuit breaker interlocking sliding plate (42), and the circuit breaker interlocking sliding plate (42) is controlled to rise under the action of the circuit breaker (3) to limit the opening and closing of the isolating switch (2).

3. The high voltage switchgear interlocking device according to claim 2, characterized in that: First and second baffle plates (43) and (44) are arranged on the left and right of the isolating operation empty baffle (41), and the first and second baffle plates (43) and (44) are arranged at the isolating operation shaft (21) and the grounding operation shaft (22) of the isolating switch (2) after the isolating operation empty baffle (41) rises.

4. The high voltage switchgear interlocking device according to claim 2, characterized in that: A first limiting plate (47) is arranged on one side below the circuit breaker interlocking sliding plate (42), the first limiting plate (47) limits the cable chamber door interlocking mechanism (5) before the circuit breaker interlocking sliding plate (42) rises, and the cable chamber door (11) in the high-voltage switch cabinet (1) is prevented from being opened before grounding.

5. The high voltage switchgear interlocking device according to claim 1, characterized in that: The cable chamber door interlocking mechanism (5) comprises an isolating grounding operation connecting plate (51) and a circuit breaker connecting assembly (6), one end of the isolating grounding operation connecting plate (51) is arranged on the isolating switch (2), the other end is connected with the circuit breaker connecting assembly (6), the circuit breaker connecting assembly (6) is arranged on the circuit breaker (3), the circuit breaker connecting assembly (6) is connected with the cable chamber door (11) through a cable chamber door hard interlocking rod (13), and after the isolating switch (2) is grounded, the circuit breaker connecting assembly (6) is automatically raised to drive the cable chamber door hard interlocking rod (13) to move upwards to open the cable chamber door (11).

6. The high voltage switchgear interlocking device according to claim 5, characterized in that: An L-shaped connecting plate (52) is arranged on the isolating grounding operation connecting plate (51), the L-shaped connecting plate (52) is movably arranged on the isolating switch (2) through a reset spring (56), the upper end of the L-shaped connecting plate (52) is in contact with a grounding operation shaft swing arm (35) on the grounding operation shaft (22) of the isolating switch (2), and after the L-shaped connecting plate (52) is out of contact with the grounding operation shaft swing arm (35), the isolating grounding operation connecting plate (51) moves upwards under the action of the reset spring (56).

7. The high voltage switchgear interlocking device according to claim 5, characterized in that: The circuit breaker connecting assembly (6) comprises a circuit breaker interlocking plate (61) and a circuit breaker interlocking baffle (62), the circuit breaker interlocking plate (61) is movably arranged on the circuit breaker (3) and connected with the isolation ground operating connecting plate (51) at one end, the circuit breaker interlocking plate (61) moves along with the isolation ground operating connecting plate (51), the circuit breaker interlocking baffle (62) is hingedly connected with the circuit breaker interlocking plate (61) at one end, and the circuit breaker interlocking baffle (62) rotates along the hinge when the circuit breaker interlocking plate (61) moves upwards.

8. The high voltage switchgear interlocking device according to claim 7, characterized in that: A second limiting plate (69) is arranged on one side of the circuit breaker interlocking baffle (62), the second limiting plate (69) cooperates with the first limiting plate (47) on the circuit breaker interlocking slide plate (42), and the circuit breaker interlocking baffle (62) is prevented from rotating, and the circuit breaker interlocking baffle (62) can rotate only after the circuit breaker interlocking slide plate (42) moves upwards.

9. The high voltage switchgear interlocking device according to claim 7, characterized in that: A limiting foot (63) is arranged at the lower end of the circuit breaker interlocking plate (61), the limiting foot (63) cooperates with the disconnecting button (31) in the circuit breaker (3), and the circuit breaker (3) cannot be disconnected when the cable chamber door (11) is opened.

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