Interlock mechanism for switch cabinet

Abstract

The utility model discloses switchgear interlocking mechanism belongs to switchgear technical field, include: support, set up in the inner wall of cable chamber, rotationally arranged with the pivot on the support, static contact and the movable contact are linked with support and pivot respectively, the cabinet door is detachably installed in the outside of cable chamber, and the cable chamber is equipped with interlocking component, is used for driving pivot rotation and cooperates locking cabinet door, and the movable contact can be realized rotation of static contact and reaches the opening and closing function of static contact through interlocking component, and the reliability is high and the cost is low, when the staff overhauls maintenance, through interlocking component unblocking cabinet door makes movable contact and static contact connection and closes simultaneously, guarantees the stability of movable contact and static contact contact, also greatly prevents the phenomenon of earthing switch accidental opening, and the protection effect of staff is good, also can better protection electrical equipment, and the safety performance is high.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, and more specifically, to a switchgear interlocking mechanism. Background Technology

[0002] A switchgear is an electrical device used for power generation, transmission, distribution, and energy conversion. Its main functions are to switch, control, protect, and monitor circuits in a power system. It typically consists of auxiliary equipment such as circuit breakers, disconnect switches, load switches, grounding switches, current transformers, voltage transformers, and relay protection devices.

[0003] Among them, the grounding switch in the cable compartment of the switchgear is a device used to connect electrical equipment or lines to the ground. The grounding switch usually includes a moving contact connected to the power system and a stationary contact that is fixed and connected to the ground. The grounding switch is closed and opened by moving the moving contact.

[0004] When opening the cabinet door for inspection or maintenance: the grounding switch must be closed; during normal operation or preparation for energization: the grounding switch must be open to ensure personal safety. Currently, the interlocking between the cabinet door and the grounding switch outside the cable room is usually achieved using mechanical locks or program locks. However, program locks are more complex, costly, and prone to failure; while current mechanical locks have complex structures and poor interlocking reliability. When the cabinet door is opened for inspection and maintenance, the moving contact of the grounding switch is not stable and is prone to accidental tripping, which poses a serious threat to personal and equipment safety.

[0005] Therefore, it is necessary to provide a switchgear interlocking mechanism to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this utility model is to provide a switch cabinet interlocking mechanism to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A switchgear interlocking mechanism is installed in the cable compartment of the cabinet. The cable compartment is equipped with a connection switch, which includes multiple moving contacts and multiple stationary contacts, including:

[0009] A bracket is installed on the inner wall of the cable compartment, and a rotating shaft is rotatably mounted on the bracket. The stationary contact and the moving contact are respectively connected to the bracket and the rotating shaft.

[0010] The cabinet door is detachably installed outside the cable tray, and the cable tray is equipped with an interlocking component for driving the rotating shaft to rotate and locking the cabinet door.

[0011] Furthermore, the interlocking component includes:

[0012] A coupling is rotatably mounted on the inner wall of the cable chamber. A worm gear is mounted on the coupling, and a worm wheel that meshes with the worm gear is mounted on the rotating shaft.

[0013] A locking component, located at the outer end of the coupling, is used to lock the cabinet door.

[0014] Furthermore, the locking component includes:

[0015] A mounting block is provided at one end of the coupling extending to the cable outlet, and a locking block is provided on the mounting block;

[0016] The cabinet door is provided with a clearance groove that is adapted to the mounting block and the locking block.

[0017] Furthermore, both the cabinet door and the outer wall of the cable tray are provided with fixing holes, and the locking block is threaded with fastening bolts that are compatible with the fixing holes.

[0018] Furthermore, an elastic element is hinged to the moving contact, and the other end of the elastic element is hinged to the bracket.

[0019] Furthermore, the inner wall of the cable compartment is also provided with a support rod, a connecting rod is rotatably mounted on the support rod, a limiting block is provided at the outer end of the connecting rod, and an L-shaped baffle is provided on the inner wall of the cabinet door at the position corresponding to the limiting block;

[0020] A linkage component, located in the cable chamber, is used to drive the connecting rod to rotate synchronously when the rotating shaft rotates.

[0021] Furthermore, the linkage component includes:

[0022] A first bevel gear is disposed on the rotating shaft, and a second bevel gear that meshes with the first bevel gear is provided at the inner end of the connecting rod.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] In this solution, when maintenance or repair is required, the interlocking component is operated to release the lock on the cabinet door. Simultaneously, the interlocking component drives the rotating shaft to rotate, causing multiple moving contacts to rotate and eventually contact the stationary contact to close the circuit, forming a ground. The cabinet door can then be opened for maintenance and repair. This solution achieves the opening and closing function of the stationary contact by rotating the moving contact through the interlocking component, resulting in high reliability and low cost. When personnel are performing maintenance, unlocking the cabinet door through the interlocking component simultaneously connects the moving and stationary contacts, ensuring the stability of the contact between them and greatly preventing accidental tripping of the grounding switch. This provides good protection for personnel and electrical equipment, offering high safety performance and strong practicality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the external structure of the cabinet of this utility model;

[0026] Figure 2 for Figure 1 Enlarged structural diagram at point A in the diagram;

[0027] Figure 3 This is a schematic diagram of the internal structure of the cable compartment after the cabinet door is removed, according to this utility model.

[0028] Figure 4 for Figure 3 A structural diagram from the other side of the diagram;

[0029] Figure 5 This is a partial structural diagram of the indoor grounding switch for cables according to this utility model;

[0030] Figure 6 This is a view of the back of the cabinet door and a schematic diagram of a partial structure of the cable tray inside the room.

[0031] Explanation of the labels in the diagram:

[0032] 1. Cabinet; 2. Cable compartment; 3. Switch connection; 31. Moving contact; 32. Stationary contact; 4. Bracket; 5. Shaft; 6. Elastic element; 7. Cabinet door; 8. Interlocking components; 81. Coupling; 82. Worm gear; 83. Worm wheel; 84. Locking assembly; 841. Mounting block; 842. Locking block; 9. Clearance groove; 10. Fixing hole; 11. Fastening bolt; 12. Support rod; 13. Connecting rod; 14. Limit block; 15. L-shaped baffle; 16. Linkage assembly; 161. First bevel gear; 162. Second bevel gear. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figure 1-6 The switchgear interlocking mechanism is installed in the cable compartment 2 of the cabinet 1. The cable compartment 2 is equipped with a switch 3. The switch 3 includes multiple moving contacts 31 and multiple stationary contacts 32, including:

[0035] The bracket 4 is installed on the inner wall of the cable chamber 2. A rotating shaft 5 is rotatably installed on the bracket 4. The stationary contact 32 and the moving contact 31 are respectively connected to the bracket 4 and the rotating shaft 5.

[0036] Cabinet door 7 is detachably installed outside cable compartment 2. Cable compartment 2 is equipped with interlocking component 8, which is used to drive the rotating shaft 5 to rotate and lock cabinet door 7.

[0037] When cabinet door 7 needs to be opened for inspection or maintenance, after power is cut off and tested, the interlocking component 8 needs to be operated to release the lock on cabinet door 7. Interlocking component 8 will simultaneously drive the rotating shaft 5 to rotate. At this time, the rotation of the rotating shaft 5 will drive multiple moving contacts 31 to rotate. When cabinet door 7 is unlocked, the moving contact 31 connected to switch 3 rotates from a vertical state to a horizontal state. Finally, the moving contact 31 contacts and connects with the stationary contact 32, that is, the grounding switch 3 closes, forming a ground. Figure 5 The cabinet door 7 can now be opened, allowing staff to perform maintenance and repair operations.

[0038] The interlocking component 8 in this solution is simple and convenient to operate. The rotation of the moving contact 31 through the interlocking component 8 achieves the opening and closing function with the stationary contact 32. It has high reliability and low cost. When the staff is performing maintenance in the cable compartment 2, the interlocking component 8 can keep the moving contact 31 and the stationary contact 32 in contact, preventing the moving contact 31 and the stationary contact 32 from separating. This ensures the stability of the contact connection between the moving contact 31 and the stationary contact 32, greatly preventing the grounding switch 3 from tripping unexpectedly. It has a good protection effect for the staff and can also better protect electrical equipment. It has high safety performance and strong practicality.

[0039] After subsequent inspection and maintenance are completed, the cabinet door 7 is installed and locked by the interlocking component 8. At the same time, the interlocking component 8 drives the rotating shaft 5 and multiple moving contacts 31 to rotate, so that the moving contacts 31 turn from the horizontal state back to the vertical state, causing the moving contacts 31 to disengage from the stationary contact 32 to form a trip, and the switch 3 is in the open state. After power is applied, the switch cabinet can be used normally.

[0040] For preferred options, please refer to [link / reference]. Figure 1-6 The interlocking component 8 includes:

[0041] The coupling 81 is rotatably mounted on the inner wall of the cable chamber 2. The coupling 81 is equipped with a worm gear 82, and the rotating shaft 5 is equipped with a worm wheel 83 that meshes with the worm gear 82.

[0042] Locking component 84 is located at the outer end of coupling 81 and is used to lock cabinet door 7.

[0043] Specifically, when maintenance is required, rotating the locking component 84 will drive the coupling 81 to rotate. When the coupling 81 rotates, it will drive the worm gear 82 to rotate, which in turn will drive the worm wheel 83 and the rotating shaft 5 to rotate. The rotating shaft 5 will then drive multiple moving contacts 31 to rotate, causing the moving contacts 31 to rotate from a vertical state to a horizontal state. Finally, the moving contacts 31 will make contact with the stationary contacts 32, and the grounding switch 3 will close. At this time, the cabinet door 7 will also be released from the locking component 84, and the cabinet door 7 can be removed for maintenance.

[0044] Furthermore, since the worm gear 82 and worm wheel 83 are self-locking structures, the worm wheel 83 and the rotating shaft 5 can only be driven to rotate by the rotation of the coupling 81, and the reverse is not possible. That is, the rotating shaft 5 cannot rotate on its own. This makes the contact connection between the moving contact 31 and the stationary contact 32 on the rotating shaft 5 more stable, preventing the moving contact 31 from disengaging from the stationary contact 32 and causing accidental tripping. This better protects the staff and electrical equipment, and ensures high safety.

[0045] In this embodiment, preferably, please refer to 1-3 and Figure 6 The locking component 84 includes:

[0046] Mounting block 841 is located at one end of coupling 81 extending to cable chamber 2, and locking block 842 is provided on mounting block 841;

[0047] The cabinet door 7 is provided with a clearance groove 9 that is compatible with the mounting block 841 and the locking block 842.

[0048] Specifically, during normal operation, the locking block 842 is in a horizontal state. At this time, the locking block 842 will block the cabinet door 7, thus locking the cabinet door 7 and preventing it from being moved. This avoids opening the cabinet door 7 without closing the grounding switch 3, thereby improving personal safety protection.

[0049] During maintenance, rotating the mounting block 841 and locking block 842 causes the locking block 842 to turn vertically. At this point, the moving contact 31 and the stationary contact 32 connect to form a closed circuit. Figure 2-5 As shown, at this time, the locking block 842 corresponds to the clearance groove 9 of the cabinet door 7. After moving the cabinet door 7, the locking block 842 will pass through the clearance groove 9. That is, the cabinet door 7 is not blocked and locked by the locking block 842. Only after the locking block 842 rotates and the grounding switch 3 is closed can the cabinet door 7 be moved for inspection and maintenance, which greatly protects personal safety and equipment safety.

[0050] In this embodiment, preferably, please refer to [reference needed]. Figure 2-4 Fixing holes 10 are provided on the outer walls of cabinet door 7 and cable compartment 2, and fastening bolts 11 that are compatible with fixing holes 10 are threaded onto locking block 842.

[0051] With this design, during normal operation, the locking block 842 is in a horizontal state. By tightening the fastening bolt 11, it can be inserted into the fixing hole 10 on the cabinet door 7, thus limiting and fixing the locking block 842. When maintenance is required, the locking block 842 is in a vertical state. After the cabinet door 7 is removed, the fastening bolt 11 can be tightened to insert it into the fixing hole 10 on the outer wall of the cable compartment 2, thus limiting and fixing the locking block 842.

[0052] In summary, tightening bolt 11 can further stabilize the locking block 842, preventing accidental rotation of the locking block 842 and coupling 81 in case of accidental contact or collision, and better ensuring the stability of the subsequent closing / opening of the grounding switch 3.

[0053] Furthermore, an elastic element 6 is hinged to the moving contact 31, and the other end of the elastic element 6 is hinged to the bracket 4. The elastic element 6 in this application can be a spring.

[0054] With this design, when the moving contact 31 rotates to contact or separate from the stationary contact 32, the elastic element 6 can improve the contact effect of the moving contact 31 and provide partial buffering for the rotation of the moving contact 31, which can slow down the change in position of the moving contact 31, better protect the moving contact 31, and improve its service life.

[0055] For preferred options, please refer to [link / reference]. Figure 4-6 The inner wall of the cable compartment 2 is also provided with a support rod 12, and a connecting rod 13 is rotatably provided on the support rod 12. A limit block 14 is provided at the outer end of the connecting rod 13, and an L-shaped baffle 15 is provided at the corresponding limit block 14 position on the inner wall of the cabinet door 7.

[0056] The linkage component 16 is located in the cable chamber 2 and is used to drive the connecting rod 13 to rotate synchronously when the rotating shaft 5 rotates.

[0057] With this design, during normal operation, the interlocking component 8 will lock the cabinet door 7, and at the same time, the limiting block 14 on the connecting rod 13 will be locked inside the L-shaped baffle 15 of the cabinet door 7. Thus, the limiting block 14 can further lock the cabinet door 7, improve the locking effect of the cabinet door 7, and thus improve safety.

[0058] When maintenance is performed, the interlocking component 8 releases the lock on the cabinet door 7, causing the rotating shaft 5 to rotate. This rotation of the shaft 5, via the linkage component 16, drives the connecting rod 13 to rotate synchronously. The rotation of the connecting rod 13 then drives the limit block 14 to rotate, ultimately causing the limit block 14 to rotate out of the L-shaped baffle 15. Figure 6 In the state shown, the limit block 14 is no longer stuck in the L-shaped baffle 15, and the cabinet door 7 can be moved away, which also releases the lock of the limit block 14.

[0059] In addition, during subsequent maintenance and repair, if the interlocking component 8 fails due to prolonged use and the rotating shaft 5 does not rotate, meaning the grounding switch 3 is not closed and the rotating shaft 5 does not rotate, then the limit block 14 will remain stuck in the L-shaped baffle 15, and the cabinet door 7 will still be unable to move out. This will serve as a safety measure to prevent the cabinet door 7 from being opened and causing danger.

[0060] In this embodiment, preferably, please refer to [reference needed]. Figure 4 and Figure 6 The linkage component 16 includes:

[0061] The first bevel gear 161 is mounted on the rotating shaft 5, and the inner end of the connecting rod 13 is provided with a second bevel gear 162 that meshes with the first bevel gear 161.

[0062] Specifically, when the rotating shaft 5 rotates, it will drive the first bevel gear 161 to rotate, and the first bevel gear 161 will drive the second bevel gear 162 and the connecting rod 13 to rotate, and the connecting rod 13 will drive the limit block 14 to rotate.

[0063] It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various modifications or changes based on them. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0064] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0065] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A switch cabinet interlocking mechanism, installed in the cable compartment (2) of the cabinet (1), wherein the cable compartment (2) is provided with a connecting switch (3), the connecting switch (3) comprising a plurality of moving contacts (31) and a plurality of stationary contacts (32), characterized in that, include: A bracket (4) is disposed on the inner wall of the cable chamber (2). A rotating shaft (5) is rotatably disposed on the bracket (4). The stationary contact (32) and the moving contact (31) are respectively connected to the bracket (4) and the rotating shaft (5). The cabinet door (7) is detachably installed outside the cable chamber (2). The cable chamber (2) is provided with an interlocking component (8) for driving the rotating shaft (5) to rotate and lock the cabinet door (7).

2. The switchgear interlocking mechanism according to claim 1, characterized in that, The interlocking component (8) includes: The coupling (81) is rotatably mounted on the inner wall of the cable chamber (2). A worm gear (82) is mounted on the coupling (81), and a worm wheel (83) meshing with the worm gear (82) is mounted on the rotating shaft (5). A locking component (84) is located at the outer end of the coupling (81) and is used to lock the cabinet door (7).

3. The switchgear interlocking mechanism according to claim 2, characterized in that, The locking component (84) includes: Mounting block (841) is provided at one end of the coupling (81) extending to the outside of the cable chamber (2), and a locking block (842) is provided on the mounting block (841). The cabinet door (7) is provided with a clearance groove (9) that is compatible with the mounting block (841) and the locking block (842).

4. The switchgear interlocking mechanism according to claim 3, characterized in that, Fixing holes (10) are provided on the outer walls of the cabinet door (7) and the cable chamber (2), and fastening bolts (11) that are compatible with the fixing holes (10) are threaded onto the locking block (842).

5. The switchgear interlocking mechanism according to claim 1, characterized in that, An elastic element (6) is hinged to the moving contact (31), and the other end of the elastic element (6) is hinged to the bracket (4).

6. The switchgear interlocking mechanism according to claim 1, characterized in that, The inner wall of the cable compartment (2) is also provided with a support rod (12), and a connecting rod (13) is rotatably provided on the support rod (12). A limiting block (14) is provided at the outer end of the connecting rod (13), and an L-shaped baffle (15) is provided at the corresponding position of the limiting block (14) on the inner wall of the cabinet door (7). The linkage component (16) is located in the cable chamber (2) and is used to drive the connecting rod (13) to rotate synchronously when the rotating shaft (5) rotates.

7. The switchgear interlocking mechanism according to claim 6, characterized in that, The linkage component (16) includes: The first bevel gear (161) is mounted on the rotating shaft (5), and the inner end of the connecting rod (13) is provided with a second bevel gear (162) that meshes with the first bevel gear (161).

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