A ring main unit with circuit breaker and cable compartment door five-prevention interlock

Abstract

The utility model relates to a kind of ring main unit of circuit breaker and cable room door five-prevention interlock, including cabinet, cable room and cable room door, cable room is set in the side of cabinet, cable room door is set on cable room, isolation mechanism and circuit breaker mechanism are set in cabinet from top to bottom, interlock mechanism is linkedly arranged between isolation mechanism, circuit breaker mechanism and cable room door, interlock mechanism includes first interlock component, second interlock component and third interlock component, the both ends of first interlock component are respectively connected with the grounding switch operating shaft of isolation mechanism and cable room door, the both ends of second interlock component are respectively connected with the state indicating shaft of circuit breaker mechanism and cable room door, the first end of third interlock component can be abutted with cable room door, and the second end is used to open or close the operating hole of grounding switch operating shaft when cable room door is closed or opened.The utility model realizes that interlock transmission is not limited by distance and direction, and improve the reliability of interlock.

Description

Technical Field

[0001] This utility model relates to the field of ring main unit technology, and in particular to a ring main unit with a five-proof interlock between the circuit breaker and the cable compartment door. Background Technology

[0002] In power transmission and transformation systems, ring main units are very important electrical equipment. Once a misoperation occurs, it can cause equipment damage or even power system failure. It has been proven that simply relying on regulations to constrain human behavior is often insufficient to prevent misoperation accidents. Therefore, regulations require ring main units to have complete and reliable "five-proof" functions to ensure the safe operation of personnel and the power grid.

[0003] Five-proof interlocking is an important safety measure for high-voltage ring main units, ensuring operational and personal safety. It is an important power distribution equipment device in the power system. In traditional ring main units, the cable compartment is located below the mechanism compartment, and the vertical distance between the mechanism compartment and the cable compartment door is small, and they are configured on the same plane. It is easy to achieve five-proof interlocking between the circuit breaker mechanism and the cable compartment by using interlocking rods. However, when the circuit breaker mechanism and the cable compartment door are far apart and not on the same plane, the traditional interlocking scheme cannot achieve the function of five-proof interlocking.

[0004] The invention disclosed in CN114974954A is a switch cabinet with an interlocking mechanism, including a mounting panel, a grounding switch operating gate, a disconnecting switch operating gate, a circuit breaker operating gate, and a lower cabinet door. It also includes a locking device, a first limiting mechanism, and a second limiting mechanism. When the first limiting mechanism is in the first working position, it limits the grounding switch operating gate and the locking device to restrict the opening of the lower cabinet door. When the first limiting mechanism is in the second working position, it limits the locking device to restrict the opening of the lower cabinet door. When the first limiting mechanism is in the third working position, it limits the disconnecting switch operating gate and the circuit breaker operating gate. The second limiting mechanism is used to limit the disconnecting switch operating gate. Although the interlocking between the grounding switch operating gate, the disconnecting switch operating gate, the circuit breaker operating gate, and the locking device is achieved, it can only meet the usage conditions where the cable compartment door is located below the device. The interlocking transmission is limited by distance and direction, making it difficult to meet the cable compartment door arrangement requirements in various scenarios. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing a ring main unit with a five-proof interlock between the circuit breaker and the cable compartment door, which realizes that the interlocking transmission is not limited by distance and direction, thereby improving the reliability of the interlocking function.

[0006] To achieve the above objectives, this utility model provides a system comprising a cabinet, a cable compartment, and a cable compartment door. The cable compartment is located on the side of the cabinet, and the cable compartment door is openable and closable on the cable compartment. An isolation mechanism and a circuit breaker mechanism are arranged from top to bottom inside the cabinet. An interlocking mechanism is linked between the isolation mechanism, the circuit breaker mechanism, and the cable compartment door. The interlocking mechanism includes a first interlocking component, a second interlocking component, and a third interlocking component. The first end of the first interlocking component is connected to the grounding switch operating shaft of the isolation mechanism, and the second end is engaged with the cable compartment door. The first end of the second interlocking component is connected to the status indicator shaft of the circuit breaker mechanism, and the second end is engaged with the cable compartment door. The first end of the third interlocking component can abut against the cable compartment door, and the second end is used to open the operating hole of the grounding switch operating shaft when the cable compartment door is closed, and to close the operating hole of the grounding switch operating shaft when the cable compartment door is open.

[0007] In this invention, by setting a first interlocking component between the grounding switch operating shaft of the isolation mechanism and the cable compartment door, and a second interlocking component between the status indicator shaft of the circuit breaker mechanism and the cable compartment door, the cable compartment door is locked when the grounding switch operating shaft and / or the circuit breaker is in the open state, i.e., the cable compartment door cannot be opened, thus preventing operators from accidentally opening the cable compartment door and eliminating safety hazards. By setting a third interlocking component, when the cable compartment door is open, the operating hole of the grounding switch operating shaft is automatically blocked, preventing the grounding switch operating shaft from operating, reducing the safety hazards caused by accidental operation of the grounding switch operating shaft when the cable compartment door is opened. By setting the first, second, and third interlocking components, the interlocking of the grounding switch operating shaft, the status indicator shaft, and the cable compartment door is not limited by space and distance, and the installation positions of the cable compartment and the cable compartment door can be reasonably arranged on the side of the cabinet, achieving a three-dimensional interlocking effect.

[0008] Optionally, the first interlocking assembly includes a crank arm, a sliding plate, a first pull rope, a first locking hook, and a first locking buckle. The crank arm is mounted on the grounding switch operating shaft, the sliding plate is slidably mounted on the isolation mechanism, the side of the crank arm can movably abut against the sliding plate, the bottom of the sliding plate is connected to the first end of the first pull rope, the first locking buckle is fixedly mounted inside the opening of the cable compartment door, the first locking hook is rotatably mounted on the inner wall of the cable compartment and can be hooked with the first locking buckle, the second end of the first pull rope is connected to the first locking hook, and a first return spring is provided on the first locking hook.

[0009] In this invention, the movable contact between the crank arm and the sliding plate transforms the rotational motion of the grounding switch operating shaft and the crank arm into the lateral movement of the sliding plate, thereby achieving the tensioning effect of the first pull rope, which in turn acts on the first locking hook and the first locking buckle. The first pull rope serves as a transmission component, ensuring that the linkage between the grounding switch operating shaft and the first locking hook is not limited by distance or direction, thus meeting the installation layout requirements of the cable compartment at different locations on the cabinet.

[0010] Optionally, the first interlocking assembly further includes a second return spring and two mounting shafts. The slide plate has two elongated holes, and the inner ends of the two mounting shafts pass through the two elongated holes one by one and are connected to the isolation mechanism. One end of the second return spring is connected to one of the mounting shafts, and the other end is connected to the slide plate.

[0011] When the grounding switch is operated to open, the crank arm abuts against and drives the sliding plate to move. The second reset spring is compressed and shortened, the first pull rope is tightened, the second end of the first pull rope pulls the first locking hook to rotate and lock the first lock buckle, and the first reset spring retracts.

[0012] When the grounding switch operating shaft is closed, the crank arm rotates in the reverse direction, the second reset spring resets and drives the sliding plate to move in the reverse direction, the first pull rope loosens, the first reset spring resets and drives the first locking hook to rotate in the reverse direction and releases the lock from the first latch.

[0013] In this invention, two mounting shafts serve to mount the slide plate, and the cooperation between the two mounting shafts and two elongated holes guides the slide plate. Setting the number of mounting shafts to two ensures the stability of the slide plate during lateral movement. The second return spring allows the slide plate to return to its original position by restoring its elastic deformation when it is no longer subjected to the clamping force of the crank arm.

[0014] Optionally, the first interlocking assembly further includes a first port, a first bracket, a second port, and a first mounting base. The first bracket is fixedly mounted on the isolation mechanism, the first port is mounted on the first bracket, the first mounting base is fixedly mounted on the side wall of the cable compartment, and the second port is mounted on the first mounting base. The first pull rope includes a steel wire rope and a wear-resistant layer covering the steel wire rope. The two ends of the wear-resistant layer of the first pull rope are fixedly connected to the first port and the second port, respectively. The two ends of the steel wire rope of the first pull rope extend from the wear-resistant layer and are respectively connected to the sliding plate and the first locking hook.

[0015] In this invention, the first and second openings are used to fix the wear-resistant layer of the first pull rope. When the first pull rope is tightened, the wear-resistant layer of the first pull rope remains fixed in position with the first and second openings. The steel wire rope of the first pull rope can move relative to the wear-resistant layer along the length direction, thereby achieving the tightening effect on the first locking hook.

[0016] Optionally, the second interlocking assembly includes a crank, a second pull rope, a second locking hook, and a second latch. The crank is mounted on the status indicator shaft, the second latch is fixedly mounted inside the opening of the cable compartment door, the second locking hook is rotatably mounted on the inner wall of the cable compartment and can be engaged with the second latch, the first end of the second pull rope is connected to the end of the crank away from the status indicator shaft, the second end of the second pull rope is connected to the second locking hook, and a third return spring is provided on the second locking hook.

[0017] In this invention, because the crank is connected to the status indicator shaft, when the circuit breaker is tripped, the crank rotates counterclockwise synchronously with the status indicator shaft. The first end of the second pull rope is tightened, and the second end of the second pull rope tightens the second locking hook, causing it to hook onto the second latch. The second pull rope acts as a linkage transmission component, ensuring that the linkage between the status indicator shaft and the second locking hook is not limited by distance or direction. Furthermore, because both the first and second latches are installed on the cable compartment door, the cable compartment door will be locked and cannot be opened when at least one of the grounding switch operating shaft or the status indicator shaft is in the tripped state, reducing safety hazards.

[0018] Optionally, the second interlocking assembly further includes a third port, a fourth port, and a second mounting base. The third port is fixedly disposed inside the cabinet, the second mounting base is fixedly disposed on the side wall of the cable compartment, the fourth port is mounted on the second mounting base, the two ends of the outer wear-resistant layer of the second pull rope are respectively connected to the third port and the fourth port, and the inner steel wire rope of the second pull rope extends out from both ends of the wear-resistant layer and is respectively connected to the crank and the second locking hook.

[0019] In this invention, the third and fourth openings are used to fix the wear-resistant layer of the second pull rope. When the second pull rope is tightened, the wear-resistant layer of the second pull rope remains fixed in position with the third and fourth openings. The steel wire rope of the second pull rope can move relative to the wear-resistant layer along the length direction, thereby achieving the tightening effect on the second locking hook.

[0020] Optionally, the third interlocking assembly includes a baffle, an elastic support, a vertical rod, a third pull rope, a pressure plate, and a fourth return spring. The elastic support is fixedly mounted on the isolation mechanism. The upper end of the vertical rod is connected to the elastic support. The baffle is fixedly mounted on the side of the vertical rod and can block or open the operating hole of the grounding switch operating shaft. The pressure plate is rotatably mounted on the inner wall of the cable chamber. The outer end of the pressure plate abuts against the inner wall of the cable chamber door. The two ends of the fourth return spring are respectively connected to the pressure plate and the inner wall of the cable chamber. The first end of the third pull rope is connected to the lower end of the vertical rod, and the second end of the third pull rope is connected to the pressure plate.

[0021] When the cable compartment door is closed, the pressure plate is compressed inward, the third pull rope is tightened, the fourth reset spring is compressed, the vertical rod moves downward due to the tightening of the third pull rope, the elastic support is compressed, the baffle moves downward out of the operating hole of the grounding switch operating shaft, and the operating hole of the grounding switch operating shaft can be operated.

[0022] When the cable compartment door is opened, the fourth reset spring resets and drives the pressure plate to spring outward, the third pull rope loosens, the vertical rod moves upward due to the reset of the elastic support, the baffle moves upward and blocks the operating hole of the grounding switch operating shaft, and the operating hole of the grounding switch operating shaft cannot be operated.

[0023] Optionally, the third interlocking assembly further includes a fifth port, a second bracket, and a sixth port. The second bracket is fixedly installed inside the cabinet. The fifth port is installed on the second bracket, and the sixth port is installed on the first mounting base. The two ends of the outer wear-resistant layer of the third pull rope are respectively connected to the fifth port and the sixth port. The inner steel wire rope of the third pull rope extends out from both ends of the wear-resistant layer and is respectively connected to the vertical rod and the pressure plate.

[0024] In this invention, the fifth and sixth ports are used to fix the wear-resistant layer of the third pull rope. When the cable compartment door is closed, the steel wire rope of the third pull rope is tightened, and the wear-resistant layer of the third pull rope remains fixed in position with the fifth and sixth ports. The steel wire rope of the third pull rope can move relative to the wear-resistant layer along the length direction, thereby pulling the vertical rod and the baffle down to release the blockage of the operating hole of the grounding switch operating shaft.

[0025] Optionally, a roller is rotatably mounted on the end of the pressure plate that abuts against the cable compartment door, and the roller can roll on the inner wall of the cable compartment door when the cable compartment door is opened or closed.

[0026] In this invention, by installing rollers at the outer end of the pressure plate, the opening and closing of the cable compartment door and the extension and retraction of the pressure plate are made smoother.

[0027] Optionally, the cable compartment is located on the rear side of the cabinet.

[0028] In this utility model, the cable compartment is located on the rear side of the cabinet to facilitate operation by opening the cable compartment door and to meet the layout requirements of high-voltage ring main units in specific locations.

[0029] Beneficial effects:

[0030] This invention provides a first interlocking component between the grounding switch operating shaft of the isolation mechanism and the cable compartment door, and a second interlocking component between the status indicator shaft of the circuit breaker mechanism and the cable compartment door. This ensures that the cable compartment door is locked when the grounding switch operating shaft and / or the circuit breaker is in the open state, preventing the cable compartment door from being opened and eliminating safety hazards caused by operators accidentally opening the door. Furthermore, a third interlocking component automatically blocks the operating hole of the grounding switch operating shaft when the cable compartment door is open, preventing the grounding switch operating shaft from operating and reducing safety hazards caused by accidental operation of the grounding switch operating shaft when the cable compartment door is opened. By using the first, second, and third interlocking components, the interlocking of the grounding switch operating shaft, status indicator shaft, and cable compartment door is not limited by space or distance, allowing for a reasonable layout of the cable compartment and cable compartment door installation positions on the side of the cabinet, achieving a three-dimensional interlocking effect. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a ring main unit with a five-proof interlock between a circuit breaker and a cable compartment door, as disclosed in this utility model.

[0033] Figure 2 This is a side view of a ring main unit with a five-proof interlock between a circuit breaker and a cable compartment door, as disclosed in this utility model.

[0034] Figure 3 This is a schematic diagram of the internal structure of the cabinet disclosed in this utility model;

[0035] Figure 4 This is a schematic diagram of the internal structure of the cable housing disclosed in this utility model.

[0036] Figure label:

[0037] 1. Cabinet; 2. Cable compartment; 3. Cable compartment door; 4. Isolation mechanism; 41. Grounding switch operating shaft; 5. Circuit breaker mechanism; 51. Status indicator shaft; 6. First interlocking assembly; 61. Crank arm; 62. Slide plate; 63. First pull rope; 64. First locking hook; 65. First locking buckle; 66. First return spring; 67. Second return spring; 68. Mounting shaft; 69. Long slot; 610. First port; 611. First bracket; 612. Second port; 6 13. First mounting base; 7. Second interlocking assembly; 71. Crank; 72. Second pull rope; 73. Second locking hook; 74. Second locking buckle; 75. Third return spring; 76. Third port; 77. Fourth port; 78. Second mounting base; 8. Third interlocking assembly; 81. Baffle; 82. Elastic support; 83. Vertical rod; 84. Third pull rope; 85. Pressure plate; 86. Fourth return spring; 87. Fifth port; 88. Second bracket; 89. Sixth port.

[0038] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0041] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] See Figures 1 to 3According to an embodiment of the present invention, a ring main unit with a circuit breaker and cable compartment door interlocking for five protections includes a cabinet body 1, a cable compartment 2, and a cable compartment door 3. The cable compartment 2 is located on the side of the cabinet body 1, and the cable compartment door 3 is openable and closable on the cable compartment 2. An isolation mechanism 4 and a circuit breaker mechanism 5 are arranged from top to bottom inside the cabinet body 1. An interlocking mechanism is linked between the isolation mechanism 4, the circuit breaker mechanism 5, and the cable compartment door 3. The interlocking mechanism includes a first interlocking component 6, a second interlocking component 7, and a third interlocking component 8. The first end of the interlocking component 6 is connected to the grounding switch operating shaft 41 of the isolation mechanism 4, and the second end is engaged with the cable compartment door 3. The first end of the second interlocking component 7 is connected to the status indicator shaft 51 of the circuit breaker mechanism 5, and the second end is engaged with the cable compartment door 3. The first end of the third interlocking component 8 can abut against the cable compartment door 3, and the second end is used to open the operating hole of the grounding switch operating shaft 41 when the cable compartment door 3 is closed, and to close the operating hole of the grounding switch operating shaft 41 when the cable compartment door 3 is open.

[0043] In this invention, by setting a first interlocking component 6 between the grounding switch operating shaft 41 of the isolation mechanism 4 and the cable compartment door 3, and setting a second interlocking component 7 between the status indicator shaft 51 of the circuit breaker mechanism 5 and the cable compartment door 3, the cable compartment door 3 is locked when the grounding switch operating shaft 41 and / or the circuit breaker is in the open state, i.e., the cable compartment door 3 cannot be opened, thus preventing operators from accidentally opening the cable compartment door 3 and eliminating safety hazards. By setting a third interlocking component 8, when the cable compartment door 3 is in the open state, the operating hole of the grounding switch operating shaft 41 is automatically blocked, making the grounding switch operating shaft 41 inoperable, reducing the safety hazards caused by accidental operation of the grounding switch operating shaft 41 when the cable compartment door 3 is opened. By setting the first interlocking component 6, the second interlocking component 7 and the third interlocking component 8, the interlocking of the grounding switch operating shaft 41, the status indicator shaft 51 and the cable compartment door 3 is not limited by space and distance, and the installation positions of the cable compartment 2 and the cable compartment door 3 can be reasonably arranged on the side of the cabinet 1, realizing a three-dimensional interlocking effect.

[0044] Specifically, an observation hole is provided at the outer end of the corresponding status indicator shaft 51 on the cabinet 1. An indicator disk is fixedly connected to the outer end of the status indicator shaft 51. Opening and closing indicators are provided on the circumference of the indicator disk. When the circuit breaker is operated to open or close, the corresponding indicator on the indicator disk can be rotated to the observation hole, and the operator can intuitively view the status of the circuit breaker through the observation hole.

[0045] See Figure 3 and Figure 4In some embodiments of this utility model, the first interlocking assembly 6 includes a crank arm 61, a sliding plate 62, a first pull rope 63, a first locking hook 64, and a first locking buckle 65. The crank arm 61 is mounted on the grounding switch operating shaft 41, the sliding plate 62 is slidably mounted on the isolation mechanism 4, the side of the crank arm 61 can movably abut against the sliding plate 62, the bottom of the sliding plate 62 is connected to the first end of the first pull rope 63, the first locking buckle 65 is fixedly mounted inside the opening of the cable chamber door 3, the first locking hook 64 is rotatably mounted on the inner wall of the cable chamber 2 and can be hooked with the first locking buckle 65, the second end of the first pull rope 63 is connected to the first locking hook 64, and a first return spring 66 is provided on the first locking hook 64.

[0046] In this utility model, the movable contact between the crank arm 61 and the sliding plate 62 transforms the rotational motion of the grounding switch operating shaft 41 and the crank arm 61 into the lateral movement of the sliding plate 62, thereby achieving the tensioning effect of the first pull rope 63, which in turn acts on the first locking hook 64 and the first locking buckle 65. The first pull rope 63 serves as a transmission component, ensuring that the linkage between the grounding switch operating shaft 41 and the first locking hook 64 is not limited by distance or direction, thus meeting the installation layout requirements of the cable compartment 2 at different positions on the cabinet 1.

[0047] See Figure 3 In some embodiments of this utility model, the first interlocking assembly 6 further includes a second return spring 67 and two mounting shafts 68. The slide plate 62 has two elongated holes 69. The inner ends of the two mounting shafts 68 pass through the two elongated holes 69 one to one and are connected to the isolation mechanism 4. One end of the second return spring 67 is connected to one of the mounting shafts 68, and the other end is connected to the slide plate 62.

[0048] When the grounding switch operating shaft 41 is operated to open, the crank arm 61 abuts against and drives the sliding plate 62 to move, the second reset spring 67 is compressed and shortened, the first pull rope 63 is tightened, the second end of the first pull rope 63 pulls the first locking hook 64 to rotate and lock the first locking buckle 65, and the first reset spring 66 retracts.

[0049] When the grounding switch operating shaft 41 is closed, the crank arm 61 rotates in the reverse direction, the second reset spring 67 resets and drives the slide plate 62 to move in the reverse direction, the first pull rope 63 loosens, the first reset spring 66 resets and drives the first locking hook 64 to rotate in the reverse direction and releases the lock from the first latch 65.

[0050] In this invention, two mounting shafts 68 serve to mount the slide plate 62, and the cooperation between the two mounting shafts 68 and the two elongated holes 69 guides the slide plate 62. Setting the number of mounting shafts 68 to two ensures the stability of the slide plate 62 during lateral movement. The second return spring 67 allows the slide plate 62 to return to its original position by restoring its elastic deformation when it is no longer subjected to the clamping force of the crank arm 61.

[0051] See Figure 3 and Figure 4 In some embodiments of this utility model, the first interlocking assembly 6 further includes a first port 610, a first bracket 611, a second port 612, and a first mounting base 613. The first bracket 611 is fixedly mounted on the isolation mechanism 4. The first port 610 is mounted on the first bracket 611. The first mounting base 613 is fixedly mounted on the side wall of the cable chamber 2. The second port 612 is mounted on the first mounting base 613. The first pull rope 63 includes a steel wire rope and a wear-resistant layer covering the steel wire rope. The two ends of the wear-resistant layer of the first pull rope 63 are fixedly connected to the first port 610 and the second port 612, respectively. The two ends of the steel wire rope of the first pull rope 63 extend from the wear-resistant layer and are connected to the sliding plate 62 and the first locking hook 64, respectively.

[0052] In this invention, the first port 610 and the second port 612 are used to fix the wear-resistant layer of the first pull rope 63. When the first pull rope 63 is tightened, the wear-resistant layer of the first pull rope 63 remains fixed in position with the first port 610 and the second port 612. The steel wire rope of the first pull rope 63 can move relative to the wear-resistant layer along the length direction, thereby achieving the tightening effect on the first locking hook 64.

[0053] See Figure 3 and Figure 4 In some embodiments of this utility model, the second interlocking assembly 7 includes a crank 71, a second pull rope 72, a second locking hook 73, and a second latch 74. The crank 71 is mounted on the status indicator shaft 51. The second latch 74 is fixedly mounted inside the opening of the cable chamber door 3. The second locking hook 73 is rotatably mounted on the inner wall of the cable chamber 2 and can be hooked with the second latch 74. The first end of the second pull rope 72 is connected to the end of the crank 71 away from the status indicator shaft 51. The second end of the second pull rope 72 is connected to the second locking hook 73. A third return spring 75 is provided on the second locking hook 73.

[0054] In this invention, since the crank 71 is connected to the status indicator shaft 51, when the circuit breaker is tripped, the crank 71 can rotate counterclockwise synchronously with the status indicator shaft 51. The first end of the second pull rope 72 is tightened, and the second end of the second pull rope 72 can tighten the second locking hook 73, causing it to hook onto the second locking buckle 74. The second pull rope 72 acts as a linkage transmission component, ensuring that the linkage between the status indicator shaft 51 and the second locking hook 73 is not limited by distance or direction. Furthermore, since the cable compartment door 3 is equipped with both the first locking buckle 65 and the second locking buckle 74, the cable compartment door 3 will be locked and cannot be opened when at least one of the grounding switch operating shaft 41 and the status indicator shaft 51 is in the tripped state, reducing safety hazards.

[0055] See Figure 3 and Figure 4 In some embodiments of this utility model, the second interlocking assembly 7 further includes a third port 76, a fourth port 77, and a second mounting base 78. The third port 76 is fixedly disposed inside the cabinet 1, the second mounting base 78 is fixedly disposed on the side wall of the cable compartment 2, the fourth port 77 is mounted on the second mounting base 78, the two ends of the outer wear-resistant layer of the second pull rope 72 are respectively connected to the third port 76 and the fourth port 77, and the inner steel wire rope of the second pull rope 72 extends out of the two ends of the wear-resistant layer and is respectively connected to the crank 71 and the second locking hook 73.

[0056] In this invention, the third port 76 and the fourth port 77 are used to fix the wear-resistant layer of the second pull rope 72. When the second pull rope 72 is tightened, the wear-resistant layer of the second pull rope 72 remains fixed in position with the third port 76 and the fourth port 77. The steel wire rope of the second pull rope 72 can move relative to the wear-resistant layer along the length direction, thereby achieving the tightening effect on the second locking hook 73.

[0057] See Figure 3 and Figure 4 In some embodiments of this utility model, the third interlocking assembly 8 includes a baffle 81, an elastic support 82, a vertical rod 83, a third pull rope 84, a pressure plate 85, and a fourth reset spring 86. The elastic support 82 is fixedly mounted on the isolation mechanism 4. The upper end of the vertical rod 83 is connected to the elastic support 82. The baffle 81 is fixedly mounted on the side of the vertical rod 83 and can block or open the operating hole of the grounding switch operating shaft 41. The pressure plate 85 is rotatably mounted on the inner wall of the cable chamber 2. The outer end of the pressure plate 85 abuts against the inner wall of the cable chamber door 3. The two ends of the fourth reset spring 86 are respectively connected to the pressure plate 85 and the inner wall of the cable chamber 2. The first end of the third pull rope 84 is connected to the lower end of the vertical rod 83, and the second end of the third pull rope 84 is connected to the pressure plate 85.

[0058] When the cable compartment door 3 is closed, the pressure plate 85 is compressed inward, the third pull rope 84 is tightened, the fourth reset spring 86 is compressed, the vertical rod 83 moves downward due to the tightening of the third pull rope 84, the elastic support 82 is compressed, and the baffle 81 moves downward out of the operating hole of the grounding switch operating shaft 41, making the operating hole of the grounding switch operating shaft 41 operable.

[0059] When the cable compartment door 3 is opened, the fourth reset spring 86 resets and drives the pressure plate 85 to spring outward, the third pull rope 84 loosens, the vertical rod 83 moves upward due to the reset of the elastic support 82, the baffle 81 moves upward and blocks the operating hole of the grounding switch operating shaft 41, and the operating hole of the grounding switch operating shaft 41 cannot be operated.

[0060] See Figure 3 and Figure 4 In some embodiments of this utility model, the third interlocking assembly 8 further includes a fifth port 87, a second bracket 88, and a sixth port 89. The second bracket 88 is fixedly installed inside the cabinet 1. The fifth port 87 is installed on the second bracket 88. The sixth port 89 is installed on the first mounting base 613. The two ends of the outer wear-resistant layer of the third pull rope 84 are respectively connected to the fifth port 87 and the sixth port 89. The inner steel wire rope of the third pull rope 84 extends out of the two ends of the wear-resistant layer and is respectively connected to the vertical rod 83 and the pressure plate 85.

[0061] In this utility model, the fifth port 87 and the sixth port 89 are used to fix the wear-resistant layer of the third pull rope 84. When the cable chamber door 3 is closed, the steel wire rope of the third pull rope 84 is tightened, and the wear-resistant layer of the third pull rope 84 is fixed in position with the fifth port 87 and the sixth port 89. The steel wire rope of the third pull rope 84 can move relative to the wear-resistant layer along the length direction, thereby pulling the vertical rod 83 and the baffle 81 down to release the blockage of the operating hole of the grounding switch operating shaft 41.

[0062] Specifically, the first pull rope 63, the second pull rope 72, and the third pull rope 84 are all flexible pull ropes. The outer wear-resistant layer is made of polytetrafluoroethylene, and the inner steel wire rope is made of stainless steel. The minimum bending radius is 50mm to ensure that the inner steel wire rope can transmit power normally.

[0063] In some embodiments of this utility model, a roller is rotatably mounted on the end of the pressure plate 85 that abuts against the cable chamber door 3. When the cable chamber door 3 is opened or closed, the roller can roll on the inner wall of the cable chamber door 3.

[0064] In this utility model, by installing rollers at the outer end of the pressure plate 85, the opening and closing of the cable compartment door 3 and the extension and retraction of the pressure plate 85 are made smoother.

[0065] See Figure 1 and Figure 2 In some embodiments of this utility model, the cable compartment 2 is located on the rear side of the cabinet 1.

[0066] In this utility model, the cable compartment 2 is located on the rear side of the cabinet 1 to facilitate operation by opening the cable compartment door 3 and to meet the layout requirements of the high-voltage ring main unit in a specific location.

[0067] When this utility model is in operation, if the cable compartment door 3 is closed: the inner wall of the cable compartment door 3 is pressed against the roller of the pressure plate 85, the fourth return spring 86 is compressed, the steel wire rope of the third pull rope 84 is tightened, the vertical rod 83 and the baffle 81 move downward under the action of the third pull rope 84, the elastic support 82 is compressed and stores elastic deformation, and the baffle 81 can be pulled downward from the position of the operating hole of the grounding switch operating shaft 41. At this time, the operator can operate the grounding switch operating shaft 41 to open the circuit. When the grounding switch operating shaft 41 is opened, the crank arm 61 rotates counterclockwise, and the sliding plate 62 is pressed against by the crank arm 61 and the mounting shaft 68. Under the guidance of the first pull rope 63, the cable chamber door 3 moves to the left. The second return spring 67 is compressed and shortened, and the steel wire rope of the first pull rope 63 is tightened. The first locking hook 64 hooks the first locking buckle 65 under the tension of the first pull rope 63. The first return spring 66 retracts, and the cable chamber door 3 cannot be opened due to the locking of the first locking hook 64. When the operator operates the status indicator shaft 51 to open the circuit breaker, the crank 71 rotates counterclockwise, and the steel wire rope of the second pull rope 72 is tightened. The second locking hook 73 hooks the second locking buckle 74 under the tension of the second pull rope 72. The third return spring 75 retracts, and the cable chamber door 3 is simultaneously locked by the first hook lock and the second hook lock and cannot be opened.

[0068] When the grounding switch operating shaft 41 is closed, the crank arm 61 rotates in the reverse direction, the second return spring 67 drives the slide plate 62 to move in the reverse direction, the steel wire rope of the first pull rope 63 loosens, and the first return spring 66 drives the first locking hook 64 to rotate in the reverse direction and release its lock with the first latch 65. When the operating status indicator shaft 51 is closed, the crank 71 rotates clockwise, the steel wire rope of the second pull rope 72 loosens, and the third return spring 75 drives the second locking hook 73 to rotate in the reverse direction and release its lock with the second latch 74. That is, the cable compartment door 3 is no longer subject to the lock of the first locking hook 64 and the first latch 65. Locked by the second locking hook 73, the fourth return spring 86 restores its deformation and pushes the cable compartment door 3 outward to open. At this time, since the cable compartment door 3 is in the open state, the third steel wire rope is relaxed, and the vertical rod 83 and the baffle 81 are no longer tensioned by the third steel wire rope. Moreover, since the elastic support 82 can release its elastic deformation, the vertical rod 83 moves upward under the action of the elastic support 82, which drives the baffle 81 to move upward and block the operating hole of the grounding switch operating shaft 41. This makes it impossible for the grounding switch operating shaft 41 to be operated when the cable compartment door 3 is in the open state, reducing safety hazards.

[0069] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A ring main unit with a five-proof interlock between the circuit breaker and the cable compartment door, characterized in that, The system includes a cabinet (1), a cable compartment (2), and a cable compartment door (3). The cable compartment (2) is located on the side of the cabinet (1), and the cable compartment door (3) is located on the cable compartment (2). An isolation mechanism (4) and a circuit breaker mechanism (5) are arranged from top to bottom inside the cabinet (1). An interlocking mechanism is provided between the isolation mechanism (4), the circuit breaker mechanism (5), and the cable compartment door (3). The interlocking mechanism includes a first interlocking component (6), a second interlocking component (7), and a third interlocking component (8). The first end of the first pull rope (63) of the first interlocking component (6) is connected to the grounding switch operating shaft (41) of the isolation mechanism (4), and the second end is hooked to the cable compartment door (3). The first end of the second pull rope (72) of the second interlocking assembly (7) is connected to the status indicator shaft (51) of the circuit breaker mechanism (5), and the second end is connected to the cable compartment door (3). The first end of the third pull rope (84) of the third interlocking assembly (8) can be pressed against the cable compartment door (3), and the second end is used to open the operation hole of the grounding switch operation shaft (41) when the cable compartment door (3) is closed, and to close the operation hole of the grounding switch operation shaft (41) when the cable compartment door (3) is open. The circuit breaker mechanism (5) and the cable compartment door (3) are far apart and not on the same plane. The first pull rope (63), the second pull rope (72) and the third pull rope (84) are all flexible pull ropes.

2. The ring main unit with five-proof interlocking between the circuit breaker and the cable compartment door according to claim 1, characterized in that, The first interlocking assembly (6) includes a crank arm (61), a sliding plate (62), a first pull rope (63), a first locking hook (64), and a first locking buckle (65). The crank arm (61) is mounted on the grounding switch operating shaft (41). The sliding plate (62) is slidably mounted on the isolation mechanism (4). The side of the crank arm (61) can move and abut against the sliding plate (62). The bottom of the sliding plate (62) is connected to the first end of the first pull rope (63). The first locking buckle (65) is fixedly mounted inside the opening of the cable chamber door (3). The first locking hook (64) is rotatably mounted on the inner wall of the cable chamber (2) and can be hooked with the first locking buckle (65). The second end of the first pull rope (63) is connected to the first locking hook (64). A first return spring (66) is provided on the first locking hook (64).

3. A ring main unit with five-proof interlocking between circuit breaker and cable compartment door as described in claim 2, characterized in that, The first interlocking assembly (6) also includes a second return spring (67) and two mounting shafts (68). The slide plate (62) has two elongated holes (69). The inner ends of the two mounting shafts (68) pass through the two elongated holes (69) one by one and are connected to the isolation mechanism (4). One end of the second return spring (67) is connected to one of the mounting shafts (68), and the other end is connected to the slide plate (62). When the grounding switch operating shaft (41) is operated to open, the crank arm (61) abuts against and drives the sliding plate (62) to move, the second reset spring (67) is compressed and shortened, the first pull rope (63) is tightened, the second end of the first pull rope (63) pulls the first locking hook (64) to rotate and lock the first lock buckle (65), and the first reset spring (66) contracts. When the grounding switch operating shaft (41) is closed, the crank arm (61) rotates in the opposite direction, the second reset spring (67) resets and drives the slide plate (62) to move in the opposite direction, the first pull rope (63) loosens, the first reset spring (66) resets and drives the first locking hook (64) to rotate in the opposite direction and releases the lock with the first latch (65).

4. A ring main unit with five-proof interlocking between circuit breaker and cable compartment door as described in claim 2, characterized in that, The first interlocking assembly (6) further includes a first port (610), a first bracket (611), a second port (612), and a first mounting base (613). The first bracket (611) is fixedly mounted on the isolation mechanism (4). The first port (610) is mounted on the first bracket (611). The first mounting base (613) is fixedly mounted on the side wall of the cable chamber (2). The second port (612) is mounted on the first mounting base (613). The first pull rope (63) includes a steel wire rope and a wear-resistant layer covering the steel wire rope. The two ends of the wear-resistant layer of the first pull rope (63) are fixedly connected to the first port (610) and the second port (612) respectively. The two ends of the steel wire rope of the first pull rope (63) extend from the wear-resistant layer and are connected to the slide plate (62) and the first locking hook (64) respectively.

5. A ring main unit with five-proof interlocking between circuit breaker and cable compartment door as described in claim 1, characterized in that, The second interlocking assembly (7) includes a crank (71), a second pull rope (72), a second locking hook (73), and a second latch (74). The crank (71) is mounted on the status indicator shaft (51). The second latch (74) is fixedly mounted inside the opening of the cable chamber door (3). The second locking hook (73) is rotatably mounted on the inner wall of the cable chamber (2) and can be hooked with the second latch (74). The first end of the second pull rope (72) is connected to the end of the crank (71) away from the status indicator shaft (51). The second end of the second pull rope (72) is connected to the second locking hook (73). A third return spring (75) is provided on the second locking hook (73).

6. A ring main unit with five-proof interlocking between circuit breaker and cable compartment door as described in claim 5, characterized in that, The second interlocking assembly (7) further includes a third port (76), a fourth port (77), and a second mounting base (78). The third port (76) is fixedly installed inside the cabinet (1), and the second mounting base (78) is fixedly installed on the side wall of the cable compartment (2). The fourth port (77) is installed on the second mounting base (78). The two ends of the outer wear-resistant layer of the second pull rope (72) are connected to the third port (76) and the fourth port (77) respectively. The inner steel wire rope of the second pull rope (72) extends out from the two ends of the wear-resistant layer and is connected to the crank (71) and the second locking hook (73) respectively.

7. A ring main unit with five-proof interlocking between circuit breaker and cable compartment door according to claim 4, characterized in that, The third interlocking assembly (8) includes a baffle (81), an elastic support (82), a vertical rod (83), a third pull rope (84), a pressure plate (85), and a fourth reset spring (86). The elastic support (82) is fixedly mounted on the isolation mechanism (4). The upper end of the vertical rod (83) is connected to the elastic support (82). The baffle (81) is fixedly mounted on the side of the vertical rod (83) and can block or open the operating hole of the grounding switch operating shaft (41). The pressure plate (85) is rotatably mounted on the inner wall of the cable chamber (2). The outer end of the pressure plate (85) abuts against the inner wall of the cable chamber door (3). The two ends of the fourth reset spring (86) are respectively connected to the pressure plate (85) and the inner wall of the cable chamber (2). The first end of the third pull rope (84) is connected to the lower end of the vertical rod (83), and the second end of the third pull rope (84) is connected to the pressure plate (85). When the cable compartment door (3) is closed, the pressure plate (85) is compressed inward, the third pull rope (84) is tightened, the fourth reset spring (86) is compressed, the vertical rod (83) moves downward due to the tightening of the third pull rope (84), the elastic support (82) is compressed, and the baffle (81) moves downward out of the operating hole of the grounding switch operating shaft (41), making the operating hole of the grounding switch operating shaft (41) operable. When the cable compartment door (3) is opened, the fourth reset spring (86) resets and drives the pressure plate (85) to spring outward, the third pull rope (84) loosens, the vertical rod (83) moves upward due to the reset of the elastic support (82), the baffle (81) moves upward and blocks the operating hole of the grounding switch operating shaft (41), and the operating hole of the grounding switch operating shaft (41) cannot be operated.

8. A ring main unit with five-proof interlocking between circuit breaker and cable compartment door according to claim 7, characterized in that, The third interlocking assembly (8) further includes a fifth port (87), a second bracket (88), and a sixth port (89). The second bracket (88) is fixedly installed inside the cabinet (1). The fifth port (87) is installed on the second bracket (88). The sixth port (89) is installed on the first mounting base (613). The two ends of the outer wear-resistant layer of the third pull rope (84) are respectively connected to the fifth port (87) and the sixth port (89). The inner steel wire rope of the third pull rope (84) extends out of the two ends of the wear-resistant layer and is respectively connected to the vertical rod (83) and the pressure plate (85).

9. A ring main unit with five-proof interlocking between circuit breaker and cable compartment door according to claim 7, characterized in that, The end of the pressure plate (85) that abuts against the cable chamber door (3) is rotatably equipped with a roller. When the cable chamber door (3) is opened or closed, the roller can roll on the inner wall of the cable chamber door (3).

10. A ring main unit with five-proof interlocking between circuit breaker and cable compartment door according to any one of claims 1 to 9, characterized in that, The cable compartment (2) is located on the rear side of the cabinet (1).

Images