High-voltage switch cabinet interlocking device and operation method thereof

Abstract

The invention 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 labor cost and the raw material cost are reduced.

Description

Technical Field

[0001] The present invention specifically relates to a high-voltage switch cabinet interlocking device and an operating method thereof. Background Art

[0002] High-voltage switchgear refers to electrical products used in power systems with voltage levels ranging from 3.6kV to 550kV. It mainly includes high-voltage disconnectors and earthing switches, high-voltage load switches, high-voltage automatic reclosing and sectionalizers, high-voltage operating mechanisms, high-voltage explosion-proof distribution devices and other categories. The switchgear has functions such as overhead incoming and outgoing lines, cable incoming and outgoing lines, and busbar connection. It is widely used in power plants, substations, petrochemicals, metallurgical steel rolling, light industry and textiles, factories and mines, residential areas, high-rise buildings and other places.

[0003] In order to ensure the safety and reliability of operation, the high-voltage switchgear also has "five protection" functions, namely preventing closing the switch with load, preventing closing the switch with grounding wire, preventing accidentally entering the energized interval, preventing closing the grounding wire with power on, and preventing pulling the knife switch with load.

[0004] At present, the high-voltage switchgear transmits the circuit breaker opening and closing status between the isolation mechanism and the circuit breaker mechanism through a self-made sheet metal part plus a spring mechanism, thereby implementing a five-protection mechanical interlock. This interlocking method is backward and has many disadvantages. It is troublesome for users to operate on the spot. The interlocking method requires two-handed operation. One hand must continuously press down the interlocking mechanism to unlock the isolation switch operating mechanism, and the other hand can operate the isolation switch to open and close. The mechanical structure is complex and the stability during operation is also low. In addition, the complex structure will lead to cumbersome sheet metal processing in the workshop, which consumes a lot of time and manpower, and the cost of raw materials is high, which increases the production cost of the enterprise. Summary of the invention

[0005] The first technical problem to be solved by the present invention is the problem that the existing five-protection mechanical interlocking structure of the high-voltage switch cabinet mentioned in the background technology is complex and has high production cost.

[0006] The second technical problem to be solved by the present invention is the problem that the existing five-protection mechanical interlocking structure of the high-voltage switch cabinet mentioned in the background technology is complex and requires two-handed operation, which is inconvenient to use.

[0007] In order to solve the first technical problem mentioned above, a high-voltage switch cabinet interlocking device is proposed; it is realized by the following technical scheme: a high-voltage switch cabinet interlocking device comprises a high-voltage switch cabinet, a disconnector and a circuit breaker, the disconnector and the circuit breaker are arranged in the high-voltage switch cabinet, characterized in that: it also comprises an isolating switch interlocking mechanism and a cable room door interlocking mechanism, the isolating switch interlocking mechanism is arranged on the disconnector and is movably connected with the circuit breaker, the isolating switch interlocking mechanism can be controllably raised under the action of the circuit breaker to limit the opening and closing of the disconnector, the cable room door interlocking mechanism is arranged at the circuit breaker and is movably connected with the disconnector, the cable room door interlocking mechanism automatically releases the interlocking of the cable room door in the high-voltage switch cabinet after the disconnector is grounded, and the cable room door can be opened by single-handed operation.

[0008] Preferably, the interlocking mechanism of the isolating switch includes an isolating operation baffle and a circuit breaker interlocking slide. The circuit breaker interlocking slide is movably arranged on the circuit breaker. One end of the isolating operation baffle is movably arranged on the isolating switch, and the other end is connected to the circuit breaker interlocking slide. The circuit breaker interlocking slide rises under the action of the circuit breaker to limit the opening and closing of the isolating switch. The setting of the isolating operation baffle makes it possible for the operating hole to be blocked by the isolating operation baffle when the circuit breaker is closed, and the isolating switch cannot be operated to be grounded, thereby preventing the isolating switch from being closed with the grounding wire.

[0009] Preferably, a first baffle and a second baffle are arranged on the left and right sides of the isolation operation baffle plate, and the first baffle and the second baffle block the isolation operation shaft and the grounding operation shaft on the isolation switch after the isolation operation baffle plate rises. The first baffle and the second baffle block the operation hole of the isolation switch when the circuit breaker is closed, making it impossible to operate the isolation switch to be grounded, thereby preventing the circuit breaker from being closed with the grounding wire.

[0010] Preferably, a first limit plate is provided on one side below the circuit breaker interlocking slide, and the first limit plate limits the cable room door interlocking mechanism before the circuit breaker interlocking slide rises to prevent the cable room door in the high-voltage switch cabinet from opening before grounding. Such a setting ensures that the cable room door can only be opened after the isolating switch is in the grounded state.

[0011] Preferably, the cable room door interlocking mechanism comprises an isolating and grounding operation connecting plate and a circuit breaker connecting assembly, wherein one end of the isolating and grounding operation connecting plate is arranged on the isolating switch, and the other end is connected to the circuit breaker connecting assembly, wherein the circuit breaker connecting assembly is arranged on the circuit breaker, and the circuit breaker connecting assembly is connected to the cable room door through a hard interlocking rod of the cable room door. After the isolating switch is grounded, the circuit breaker connecting assembly automatically rises to drive the hard interlocking rod of the cable room door to move upward to open the cable room door. The arrangement of the cable room door interlocking mechanism facilitates the movement of the hard interlocking rod of the cable room door to open the cable room door. The cable room door is easy to use and can be operated with one hand, avoiding the operation with both hands.

[0012] Preferably, an L-shaped connecting plate is provided on the isolating grounding operation connecting plate, and the L-shaped connecting plate is movably arranged on the isolating switch through a reset spring, and the upper end of the L-shaped connecting plate contacts the grounding operation shaft swing arm on the grounding operation shaft in the isolating switch. After the L-shaped connecting plate is released from contact with the grounding operation shaft swing arm, the isolating grounding operation connecting plate moves upward under the action of the reset spring. The setting of the reset spring enables the reset spring to drive the cable room door interlocking mechanism to move after the isolating switch is grounded, thereby facilitating the opening of the cable room door and being easy to use.

[0013] Preferably, the circuit breaker connection assembly includes a circuit breaker interlock plate and a circuit breaker interlock baffle, wherein the circuit breaker interlock plate is movably arranged on the circuit breaker and one end is connected to the isolation grounding operation connection plate, the circuit breaker interlock plate moves as the isolation grounding operation connection plate moves, one end of the circuit breaker interlock baffle is hinged on the circuit breaker interlock plate, and the circuit breaker interlock baffle rotates along the hinge when the circuit breaker interlock plate moves up, and the circuit breaker connection assembly is arranged so that the cable room door can be opened only after the isolation operation baffle moves and the operation hole of the isolation switch is blocked, thereby improving safety.

[0014] Preferably, a second limit plate is provided on one side of the circuit breaker interlock baffle, and the second limit plate cooperates with the first limit plate on the circuit breaker interlock slide to prevent the circuit breaker interlock baffle from rotating. The circuit breaker interlock baffle can only rotate after the circuit breaker interlock slide moves up. Such an arrangement enables the isolation operation baffle to block the operating hole of the isolation switch when the cable room door is opened. At this time, the isolation switch cannot be grounded, preventing the circuit breaker from being closed with the grounding wire.

[0015] Preferably, a limit foot is provided at the lower end of the circuit breaker interlock plate, and the limit foot cooperates with the opening button in the circuit breaker. When the cable room door is opened, the circuit breaker cannot be opened. The setting of the limit foot improves safety and prevents the equipment from being powered on when the cable room door is in the open state.

[0016] In order to solve the above second technical problem, the present invention also proposes an operating method of a high-voltage switch cabinet interlocking device, which is characterized by comprising the following steps: S1. Press the opening button on the circuit breaker; S2. Rotate the isolation operating shaft on the isolation switch, the grounding operating shaft on the isolation switch rotates automatically, and the grounding operating shaft swing arm on the grounding operating shaft rotates to release the limit of the L-shaped connecting plate in the cable room door interlocking mechanism; S3. Press the closing button on the circuit breaker, the circuit breaker shaft rotates, driving the circuit breaker swing arm arranged thereon to rotate, the circuit breaker swing arm and the circuit breaker interlocking slide plate on the isolating switch interlocking mechanism move, and at the same time drive the isolating operation baffle plate to move, and the baffle plates on the isolating operation baffle plate respectively block the isolating operation shaft and the grounding operation shaft on the isolating switch to prevent misoperation; S4. After the circuit breaker interlocking slide moves up, the first limit plate on the circuit breaker interlocking slide releases the limit from the second limit plate on the circuit breaker interlocking baffle, and the isolation grounding operation connecting plate moves up under the action of the reset spring, driving the circuit breaker connection assembly to move up as a whole, and then driving the hard interlocking rod of the cable room door connected to the circuit breaker connection assembly to move up, releasing the coordination between the cable room door and the high-voltage switch cabinet; S5. Pull the cable room door outward to remove it from the high-voltage switch cabinet.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The technical solution of the present invention utilizes the isolating switch interlocking mechanism and the cable room door interlocking mechanism to cooperate with the isolating switch and the circuit breaker in the high-voltage switch cabinet to control the opening and closing of the circuit breaker, and utilizes the mutual interlocking between the isolating switch interlocking mechanism and the cable room door interlocking mechanism to realize the interlocking of the cabinet cable room door, which is convenient to use. The isolation switch interlocking mechanism and the cable room door interlocking mechanism have a simple structure, high stability, and a small number of self-made sheet metal parts, which reduces the cumbersome processing procedures of sheet metal parts in the workshop, reduces labor costs and raw material costs, and improves the economic benefits of the enterprise. In addition, the simple structure also reduces the risk of failure caused by complex structures, ensuring the reliable operation of the environmental protection cabinet. It can be operated with one hand and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional schematic diagram of the present invention Figure 1 (including high voltage switchgear); Figure 2 A three-dimensional schematic diagram of the present invention Figure 2 (excluding high-voltage switchgear); Figure 3 It is a three-dimensional schematic diagram of the isolating switch mechanism; Figure 4 This is the exploded diagram of the isolating switch mechanism; Figure 5 It is a three-dimensional schematic diagram of the interlocking mechanism of the cable room door; Figure 6 This is the exploded diagram of the cable room door interlocking mechanism; Figure 7 It is a three-dimensional schematic diagram of the circuit breaker connection components; Figure 8 Exploded view of circuit breaker connection assembly; Fig. 9This is a three-dimensional schematic diagram of the cable room door after opening for this application; Fig.10 This is the main view of the cable room door after opening for this application; Fig.11 for Fig.10 Enlarged view of point A in the middle; Description of the accompanying drawings: 1-high-voltage switch cabinet, 11-cable room door, 12-U-shaped fixing card, 13-cable room 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 limit card, 34-circuit breaker shaft, 35-circuit breaker swing arm, 4-isolating switch interlocking mechanism, 41-isolating operation baffle, 42-circuit breaker interlocking slide, 43-first baffle, 44-second baffle, 45-guide hole, 4 6-slide plate, 47-first limit plate, 5-cable room door interlocking mechanism, 51-isolation grounding operation connecting plate, 52-L-shaped connecting plate, 53-Z-shaped mounting card, 54-reset spring mounting hole, 55-reset spring fixing rod, 56-reset spring, 6-circuit breaker connection assembly, 61-circuit breaker interlocking plate, 62-circuit breaker interlocking baffle, 63-limiting foot, 64-circuit breaker operation interlocking guide plate, 65-travel switch contact plate, 66-cable room door electrical interlock, 67-travel switch, 68-guide card, 69-second limit plate. DETAILED DESCRIPTION

[0019] The following will be combined with the attached embodiment of the present invention Figure 1-11 , the technical solutions in the embodiments of the present invention are described in detail. Example

[0020] like Figure 1 , 2 As shown in 10, a high-voltage switch cabinet interlocking device includes a high-voltage switch cabinet 1, a disconnector 2, a circuit breaker 3, a disconnector interlocking mechanism 4 and a cable room 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 room door interlocking mechanism 5 is installed on the circuit breaker 3. The cable room door interlocking mechanism 5 automatically releases the interlocking of the cable room door 11 in the high-voltage switch cabinet 1 after the disconnector 2 is grounded, and the cable room door 11 can be opened by one hand.

[0021] The main function of the circuit breaker 3 is to cut off and connect the load circuit. The main function of the isolating switch 2 is to isolate the power supply to ensure the safety of the maintenance work and provide an obvious disconnection point to ensure the personal safety of the maintenance personnel. The isolating switch 2 and the circuit breaker 3 are existing devices and can be used directly. In this implementation, the preferred circuit breaker 3 is the existing model RSF-12 / CB-M equipment circuit breaker, and the isolating switch 2 is preferably the existing model C1M-1 / 3 equipment load switch.

[0022] The main function of the isolating switch interlocking mechanism 4 is that when the circuit breaker is closed, the operating hole of the isolating switch 2 is blocked by the isolating operation baffle 41 in the isolating switch interlocking mechanism 4, and the isolating switch 2 cannot be operated to ground, preventing the circuit breaker from being closed with the grounding wire. At the same time, the isolating switch interlocking mechanism 4 can also cooperate with the circuit breaker connection assembly 6 in the cable room door interlocking mechanism 5, so that the cable room door interlocking mechanism 5 can be operated to open the cable room door 11 only when the isolating switch 2 is in the grounded state and cannot be operated.

[0023] The main function of the cable room door interlock mechanism 5 is to open the cable room door 11 after the disconnector 2 is in the grounding state. The structure is simple and easy to use.

[0024] like Figure 2 , 3 As shown in Figures 4 and 9, the isolating switch interlocking mechanism 4 includes an isolating operation baffle plate 41 and a circuit breaker interlocking slide plate 42. The isolating operation baffle plate 41 and the circuit breaker interlocking slide plate 42 are connected by screws. The isolating operation baffle plate 41 is installed on the outer side surface of the isolating switch 2, and the opening and closing and grounding knife operating holes on the isolating switch 2 are blocked by the up and down movement of the circuit breaker interlocking slide plate 42.

[0025] The isolation operation baffle plate 41 is an "F"-shaped metal sheet made of stainless steel as a whole. In order to facilitate the installation of the isolation operation baffle plate 41, an oblong hole is opened on the horizontal plate of the isolation operation baffle plate 41 perpendicular to the horizontal plate. This oblong hole is named as a guide hole 45. A corresponding guide screw is fixed on the isolating switch 2, and the guide screw can cooperate with the guide hole 45. The circuit breaker interlocking slide plate 42 is installed on the isolating switch 2 through the guide hole 45. Moving the circuit breaker interlocking slide plate 42 up and down can drive the isolation operation baffle plate 41 to move up and down along the guide hole 45.

[0026] After the disconnector 2 is grounded, in order to prevent misoperation of the disconnector 2, there are two rectangular baffles on the left and right of the horizontal plate at the upper end of the disconnector operation baffle plate 41. The baffle on the left is named the second baffle plate 44, and the baffle on the right is named the first baffle plate 43. The first baffle plate 43 corresponds to the disconnector operation shaft 21 on the disconnector 2, and the second baffle plate 44 corresponds to the grounding operation shaft 22 on the disconnector 2. When the disconnector 2 is grounded, the disconnector operation baffle plate 41 moves up along the disconnector 2 under the action of the circuit breaker interlocking slide plate 42, blocking the disconnector operation shaft 21 and the grounding operation shaft 22, thereby completing the shielding of the separation and closing and grounding knife operation holes on the disconnector 2, and preventing misoperation of the disconnector 2 after grounding.

[0027] Definition: In this 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 upward, and the direction from the high-voltage switch cabinet 1 to the ground is downward, and the cable room door 11 is arranged at the bottom of the high-voltage switch cabinet 1.

[0028] The circuit breaker interlocking slide plate 42 is a metal sheet with a rectangular cross-section made of stainless steel. The upper end of the circuit breaker interlocking slide plate 42 is connected to the isolation operation baffle plate 41 by screws. In order to facilitate the installation of the circuit breaker interlocking slide plate 42, two oblong holes are opened on the circuit breaker interlocking slide plate 42 perpendicular to the circuit breaker interlocking slide plate 42. These oblong holes are named guide holes 45. Two guide screws are also fixed on the circuit breaker 3. The guide screws cooperate with the guide holes 45, so that the circuit breaker interlocking slide plate 42 moves along the guide holes 45 when it moves up and down, thereby realizing the fixation of the circuit breaker interlocking slide plate 42.

[0029] In order to facilitate the control of 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, and this rectangular plate is named a 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 on the circuit breaker 3. The circuit breaker swing arm 35 is a metal cam. When the disconnector 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 circuit breaker interlocking slide plate 42 to move upward as a whole, thereby covering the opening and closing and grounding knife operating holes on the disconnector 2, and preventing misoperation of the disconnector 2 after grounding.

[0030] In order to facilitate the falling and resetting of the circuit breaker interlocking slide 42, a spring is hung on the inner side of the circuit breaker interlocking slide 42, one end of the spring is hung on the inner side of the circuit breaker interlocking slide 42, and the other end is hung on the circuit breaker 3. When the circuit breaker interlocking slide 42 moves up, the spring is compressed. When the circuit breaker swing arm 35 releases the contact with it, the circuit breaker interlocking slide 42 is reset and moved down under the action of the spring.

[0031] In order to facilitate the cooperation between the isolation switch interlocking mechanism 4 and the cable room door interlocking mechanism 5, so that the cable room door interlocking mechanism 5 can move up to open the cable room door 11 only after the isolation switch interlocking mechanism 4 moves up, a rectangular plate is bent inward on the side of the circuit breaker interlocking slide plate 42 in the isolation switch interlocking mechanism 4, and this rectangular plate is named the first limit plate 47. The first limit plate 47 cooperates with the cable room door interlocking mechanism 5. Only when the isolation switch interlocking mechanism 4 moves up and the cooperation between the first limit plate 47 and the cable room door interlocking mechanism 5 is released, the cable room door interlocking mechanism 5 can move up to open the cable room door 11, thereby ensuring construction safety.

[0032] like Figure 2 , 5 As shown in Figures , 6, 7, 8 and 11, the cable room 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 disconnector 2, and the other end is connected to the circuit breaker connecting assembly 6. The circuit breaker connecting assembly 6 is connected to the cable room door 11 through the cable room door hard interlocking rod 13.

[0033] 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.

[0034] The main function of the circuit breaker connection assembly 6 is to control the opening of the cable room door 11. The up and down movement of the circuit breaker connection assembly 6 can drive the cable room door 11 to move up and down, thereby controlling the opening and closing of the cable room door 11. The circuit breaker connection assembly 6 is provided with a second limit plate 69, and the second limit plate 69 can cooperate with the first limit plate 47 to limit the up and down movement of the isolation grounding operation connection plate 51, thereby further limiting the opening and closing of the cable room door 11.

[0035] The isolation grounding operation connecting plate 51 is a stainless steel metal plate with an "L"-shaped cross section. One end of the isolation grounding operation connecting plate 51 is installed on the disconnector 2, and the other end is connected to the circuit breaker connecting assembly 6 by screws.

[0036] In order to facilitate the installation and fixation of the isolation grounding operation connecting plate 51 on the isolating switch 2, a "Z"-shaped card formed by bending a stainless steel metal plate is fixed on the isolating switch 2 by screws. This card is named Z-shaped mounting card 53. Circular mounting holes are opened on two parallel vertical plates of the Z-shaped mounting card 53. The shorter vertical plate of the Z-shaped mounting card 53 is fixed to the isolating switch 2 by screws.

[0037] On the other vertical plate of the Z-shaped mounting card 53, a "U"-shaped card formed by bending a stainless steel metal plate is fixed by screws, and this card is named a reset spring mounting card 54. A circular reset spring fixing rod 55 is inserted between the two parallel horizontal plates of the reset spring mounting card 54, and a reset spring 56 is arranged on the outer sleeve of the reset spring fixing rod 55. Pulling the reset spring fixing rod 55 downward can drive the reset spring 56 to compress.

[0038] An L-shaped connecting plate 52 is installed on the outside of the reset spring mounting card 54. The horizontal plate of the L-shaped connecting plate 52 is connected to the reset spring fixing rod 55, and the vertical plate of the L-shaped connecting plate 52 is connected to the isolation grounding operation connecting plate 51. When the L-shaped connecting plate 52 is pressed down, the reset spring fixing rod 55 and the isolation grounding operation connecting plate 51 will drop accordingly, and at this time the reset spring 56 is compressed.

[0039] Regarding the installation position of the Z-shaped mounting card 53, the Z-shaped mounting card 53 is installed below the grounding operating shaft 22 on the isolating switch 2. In order to facilitate the control of the descent of the isolated grounding operating connecting plate 51, a grounding operating shaft swing arm 23 is installed on the grounding operating shaft 22. The grounding operating shaft swing arm 23 is a cam. When the grounding operating shaft 22 rotates, it will correspondingly rotate synchronously with the grounding operating shaft swing arm 23. Through the contact between the grounding operating shaft swing arm 23 and the L-shaped connecting plate 52, the isolation grounding operating connecting plate 51 is controlled to descend.

[0040] like Figure 6 , 7 As shown in FIGS. 8 and 11 , the circuit breaker connection assembly 6 includes a circuit breaker interlocking plate 61 and a circuit breaker interlocking baffle 62, wherein the circuit breaker interlocking plate 61 is slidably mounted on the circuit breaker 3, and 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 hard interlocking rod 13 of the cable room door to move upward, thereby opening the cable room door 11. 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 moving upward due to erroneous operation.

[0041] The circuit breaker interlocking plate 61 is a special-shaped plate stamped from a stainless steel sheet. Two giant metal plates are folded outward at the upper end of the circuit breaker interlocking plate 61. One end of the isolation grounding operation connecting plate 51 is connected to one of the metal plates by screws, and one end of the cable room door hard interlocking rod 13 is fixed to the other metal plate by screws.

[0042] In order to facilitate the installation of the circuit breaker interlocking plate 61, a mounting plate is fixed to the circuit breaker 3 with screws. The circuit breaker interlocking plate 61 is connected to the mounting plate through a guide card 68. At the same time, an oblong guide hole 45 is correspondingly opened on the circuit breaker interlocking plate 61, and the circuit breaker interlocking plate 61 can move up and down along the guide hole 45.

[0043] The guide card 68 is a "U"-shaped metal card, and a rectangular protrusion protrudes outward from the end of the two parallel rectangular plates of the guide card 68. The two protrusions are respectively inserted into the guide holes 45 on the circuit breaker interlocking plate 61, and the guide card 68 is connected to the mounting plate by screws, thereby completing the connection between the circuit breaker interlocking plate 61 and the mounting plate. At the same time, the setting of the guide card 68 enables the circuit breaker interlocking plate 61 to move up and down along the guide hole 45 after connection.

[0044] After the cable room door 11 is opened, in order to prevent the circuit breaker 3 from opening, a limit foot 63 is provided at the lower end of the circuit breaker interlock plate 61, and the limit foot 63 corresponds to the position of the L-shaped limit card 33 corresponding to the opening button 31 on the circuit breaker 3. When the cable room door 11 is opened and the circuit breaker interlock plate 61 moves up, the limit foot 63 limits the L-shaped limit card 33. At this time, the opening button 31 is inoperable, thereby ensuring the safety of the construction workers.

[0045] The circuit breaker interlock baffle 62 is a fan-shaped metal plate made of stainless steel sheet metal. The circuit breaker interlock baffle 62 is hinged on the guide card 68 by screws. The circuit breaker interlock baffle 62 can rotate freely along the hinge. When the circuit breaker 3 is not grounded, in order to prevent the circuit breaker connection assembly 6 from moving up to open the cable chamber door 11, a rectangular plate is bent perpendicular to the circuit breaker interlock baffle 62 on the left side of the circuit breaker interlock baffle 62. This rectangular plate is named the second limit plate 69. The second limit plate 69 can cooperate with the first limit plate 47 on the circuit breaker interlock slide plate 42 to limit. When the circuit breaker interlock slide plate 42 is not moved up, the circuit breaker connection assembly 6 cannot move up before the second limit plate 69 and the first limit plate 47 limit, and the cable chamber door 11 cannot be opened at this time, thereby ensuring the safety of the operator.

[0046] An oblong guide plate is hinged on the circuit breaker interlock baffle 62 and the circuit breaker interlock plate 61, and this guide plate is named as the circuit breaker operation interlock guide plate 64. One end of the circuit breaker operation interlock guide plate 64 is hinged at a lower position on the circuit breaker interlock baffle 62, and the other end is hinged on the circuit breaker interlock plate 61. When the circuit breaker interlock plate 61 moves up and the isolation switch interlocking mechanism 4 is already in an upward state, the circuit breaker interlock baffle 62 rotates along the hinge, and at the same time drives the circuit breaker operation interlock guide plate 64 to rotate. The circuit breaker operation interlock guide plate 64 moves upward against the circuit breaker interlock plate 61, thereby driving the cable room door 11 to move up, thereby opening the cable room door 11.

[0047] In order to prevent the cable room door 11 from being operated incorrectly and to ensure the safety of the operators, the circuit breaker 3 can be electrically closed only after the cable room door 11 is closed. In order to ensure that the circuit breaker 3 is electrically closed only after the cable room door 11 is correctly closed, an "L"-shaped stainless steel metal plate is fixed to the circuit breaker 3 with screws, and this metal plate is named the cable room door electrical interlock 66. A travel switch 67 is fixed to the horizontal plate of the cable room door electrical interlock 66 with screws. A rectangular metal plate is arranged on the circuit breaker interlock plate 61 corresponding to the travel switch 67, and this metal plate is named the travel switch contact plate 65. When the circuit breaker interlock plate 61 moves downward and the cable room door 11 is correctly closed, the travel switch contact plate 65 contacts the travel switch 67, and the circuit breaker 3 can be electrically closed at this time.

[0048] Regarding the upward movement and downward movement of the cable room door interlocking mechanism 5: in a normal state, the cable room door interlocking mechanism 5 is located at the end point of the downward movement, at which time the cable room door 11 is in a closed state. The upward movement of the cable room door interlocking mechanism 5 is achieved by the force of the reset spring 56 on the L-shaped connecting plate 52, and the reset spring 56 is used to bounce the isolation grounding operation connecting plate 51 upward. Since the isolation grounding operation connecting plate 51 is connected to the circuit breaker interlocking plate 61, the circuit breaker interlocking plate 61 is driven to move upward; When the cable room door interlocking mechanism 5 moves downward, the grounding operating shaft 22 needs to rotate, thereby driving the grounding operating shaft swing arm 23 to rotate. When the grounding operating shaft swing arm 23 rotates, it will apply pressure to the L-shaped connecting plate 52, driving the isolated grounding operating connecting plate 51 to move downward. At this time, the reset spring 56 is compressed and stored.

[0049] The operation method of the high-voltage switchgear interlocking device specifically includes the following steps: S1, press the opening button 31 on the circuit breaker 3; S2, the isolation operation shaft 21 on the isolation switch 2 is rotated, the grounding operation shaft 22 on the isolation switch 2 rotates automatically, and the grounding operation shaft swing arm 23 on the grounding operation shaft 22 rotates, and the limit of the L-shaped connecting plate 52 in the cable room door interlocking mechanism 5 is released. At this time, the isolation grounding operation connecting plate 51 is in a state of being able to move upward under the action of the reset spring 56, but the isolation grounding operation connecting plate 51 cannot be moved upward under the limiting action of the second limiting plate 69 in the circuit breaker interlocking baffle 62 and the first limiting plate 47 in the circuit breaker interlocking slide plate 42; S3. Press the closing button 32 on the circuit breaker 3, the circuit breaker shaft 34 rotates automatically, driving the circuit breaker swing arm 35 arranged thereon to rotate, the circuit breaker swing arm 35 contacts the slide plate support plate 46 on the circuit breaker interlocking slide plate 42, and moves upward against the circuit breaker interlocking slide plate 42, while driving the isolation operation baffle plate 41 to move, and the baffle plates on the isolation operation baffle plate 41 respectively block the isolation operation shaft 21 and the grounding operation shaft 22 on the disconnector 2 to prevent misoperation; S4. After the circuit breaker interlocking slide plate 42 moves upward, the first limit plate 47 on the circuit breaker interlocking slide plate 42 releases the limit from the second limit plate 69 on the circuit breaker interlocking baffle 62, and the isolation grounding operation connecting plate 51 automatically moves upward under the action of the reset spring 56, driving the circuit breaker connecting assembly 6 to move upward as a whole, and then driving the cable room door hard interlocking rod 13 connected to the circuit breaker connecting assembly 6 to move upward, releasing the cable room door 11 from the high-voltage switch cabinet 1; S5. Pull the cable room door 11 outward to remove the cable room door 11 from the high-voltage switch cabinet 1.

[0050] The advantages of this embodiment are as follows: the structure is simple, and the interlocking of the cable room door 11 in the high-voltage switch cabinet 1 can be completed by utilizing the existing isolating switch 2 and circuit breaker 3 as well as the isolating switch interlocking mechanism 4, the cable room door interlocking mechanism 5 and the circuit breaker connecting assembly 6. It can be controlled by one hand and is easy to operate. In addition, the isolating switch interlocking mechanism 4, the cable room door interlocking mechanism 5 and the circuit breaker connecting assembly 6 have a simple structure and high stability, and a small number of self-made sheet metal parts, which reduces the cumbersome processing procedures of sheet metal parts in the workshop, reduces the labor cost and raw material cost, improves the economic benefits of the enterprise, and the simple structure also reduces the risk of failure caused by the complex structure, ensuring the reliable operation of the environmental protection cabinet and easy use.

[0051] The above embodiments are only for illustrating the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims

1. A high-voltage switch cabinet interlocking device, comprising a high-voltage switch cabinet (1), an isolating switch (2) and a circuit breaker (3), wherein the isolating switch (2) and the circuit breaker (3) are arranged in the high-voltage switch cabinet (1), characterized in that: The invention also comprises an isolating switch interlocking mechanism (4) and a cable room door interlocking mechanism (5), wherein the isolating switch interlocking mechanism (4) is arranged on the isolating switch (2) and is movably connected to the circuit breaker (3), and the isolating switch interlocking mechanism (4) is controllably raised under the action of the circuit breaker (3) to restrict the opening and closing of the isolating switch (2), and the cable room door interlocking mechanism (5) is arranged at the circuit breaker (3) and is movably connected to the isolating switch (2), and the cable room door interlocking mechanism (5) automatically releases the interlocking of the cable room door (11) in the high-voltage switch cabinet (1) after the isolating switch (2) is grounded, so that the cable room door (11) can be opened by single-hand operation.

2. The high-voltage switchgear interlocking device according to claim 1 is characterized in that: The isolating switch interlocking mechanism (4) comprises an isolating operation baffle plate (41) and a circuit breaker interlocking slide plate (42); the circuit breaker interlocking slide plate (42) is movably arranged on the circuit breaker (3); one end of the isolating operation baffle plate (41) is movably arranged on the isolating switch (2), and the other end is connected to the circuit breaker interlocking slide plate (42); the circuit breaker interlocking slide plate (42) rises 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 is characterized in that: A first baffle (43) and a second baffle (44) are arranged on the left and right of the isolation operation baffle plate (41); the first baffle plate (43) and the second baffle plate (44) block the isolation operation shaft (21) and the grounding operation shaft (22) on the isolation switch (2) after the isolation operation baffle plate (41) rises.

4. The high-voltage switch cabinet interlocking device according to claim 2 is characterized in that: A first limit plate (47) is provided on one side below the circuit breaker interlocking slide plate (42), and the first limit plate (47) limits the cable chamber door interlocking mechanism (5) before the circuit breaker interlocking slide plate (42) rises, thereby preventing the cable chamber door (11) in the high-voltage switch cabinet (1) from opening before grounding.

5. The high-voltage switchgear interlocking device according to claim 1 is characterized in that: The cable room door interlock mechanism (5) comprises an isolation grounding operation connection plate (51) and a circuit breaker connection assembly (6); one end of the isolation grounding operation connection plate (51) is arranged on the disconnector (2), and the other end is connected to the circuit breaker connection assembly (6); the circuit breaker connection assembly (6) is arranged on the circuit breaker (3); the circuit breaker connection assembly (6) is connected to the cable room door (11) via a cable room door hard interlock rod (13); after the disconnector (2) is grounded, the circuit breaker connection assembly (6) automatically rises to drive the cable room door hard interlock rod (13) to move upward to open the cable room door (11).

6. The high-voltage switchgear interlocking device according to claim 5 is characterized in that: An L-shaped connecting plate (52) is arranged on the isolation grounding operation connecting plate (51). The L-shaped connecting plate (52) is movably arranged on the isolation switch (2) via a return spring (56). The upper end of the L-shaped connecting plate (52) contacts the grounding operation shaft swing arm (35) on the grounding operation shaft (22) in the isolation switch (2). After the L-shaped connecting plate (52) is released from contact with the grounding operation shaft swing arm (35), the isolation grounding operation connecting plate (51) moves upward under the action of the return spring (56).

7. The high-voltage switch cabinet interlocking device according to claim 5 is characterized in that: The circuit breaker connection 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 one end of the circuit breaker interlocking plate (61) is connected to the isolation grounding operation connection plate (51); the circuit breaker interlocking plate (61) moves as the isolation grounding operation connection plate (51) moves; one end of the circuit breaker interlocking baffle (62) is hinged on the circuit breaker interlocking plate (61); when the circuit breaker interlocking plate (61) moves upward, the circuit breaker interlocking baffle (62) rotates along the hinge.

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

9. The high-voltage switchgear interlocking device according to claim 7 is characterized in that: A limit foot (63) is provided at the lower end of the circuit breaker interlock plate (61), and the limit foot (63) cooperates with a trip button (31) in the circuit breaker (3). When the cable chamber door (11) is opened, the circuit breaker (3) cannot be tripped.

10. A method for operating a high-voltage switchgear interlocking device according to any one of claims 1 to 9, characterized in that The following steps are involved: S1. Press the opening button (31) on the circuit breaker (3); S2, rotating the isolating operation shaft (21) on the isolating switch (2), the grounding operation shaft (22) on the isolating switch (2) automatically rotates, the grounding operation shaft swing arm (23) on the grounding operation shaft (22) rotates, and the limit of the L-shaped connecting plate (52) in the cable room door interlocking mechanism (5) is released; S3. Pressing the closing button (32) on the circuit breaker (3) causes the circuit breaker shaft (34) to rotate, driving the circuit breaker swing arm (35) disposed thereon to rotate, causing the circuit breaker swing arm (35) and the circuit breaker interlocking slide plate (42) on the isolating switch interlocking mechanism (4) to move, and at the same time driving the isolating operation baffle plate (41) to move, and the baffle plates on the isolating operation baffle plate (41) respectively shield the isolating operation shaft (21) and the grounding operation shaft (22) on the isolating switch (2) to prevent misoperation; S4, after the circuit breaker interlocking slide plate (42) moves upward, the first limit plate (47) on the circuit breaker interlocking slide plate (42) releases the limit from the second limit plate (69) on the circuit breaker interlocking baffle plate (62), and the isolation grounding operation connecting plate (51) moves upward under the action of the reset spring (56), driving the circuit breaker connecting assembly (6) to move upward as a whole, thereby driving the cable room door hard interlocking rod (13) connected to the circuit breaker connecting assembly (6) to move upward, and releasing the cable room door (11) from the high-voltage switch cabinet (1); S5. Pull the cable compartment door (11) outward to remove the cable compartment door (11) from the high-voltage switch cabinet (1).

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