Mechanical locking device of high-voltage switch cabinet

Abstract

The utility model relates to the technical field of high-voltage switch cabinets, and discloses a mechanical locking device of a high-voltage switch cabinet, which comprises a switch cabinet and a cabinet door, and a locking mechanism is arranged on the cabinet door. A first rotating rod is rotated through a hand wheel to enable a driving gear to rotate, so that two driven gears rotate, a toothed plate can drive a sliding clamping plate to move along a sliding rail, a cabinet door can be unlocked when the sliding clamping plate is moved to be separated from a clamping groove, and when the cabinet door is closed, the hand wheel is reversely rotated to enable the cabinet door to be closed. The two sliding clamping plates are reset and clamped with the clamping grooves again, the locking strength is high, and operation is easy, convenient and fast; the clamping rod is separated from the lock hole by pulling the pull ring, the pull ring is pulled to the position of the limiting bolt, the limiting bolt penetrates through the pull ring and is inserted into the limiting hole to lock the clamping rod, when the cabinet door is closed, locking is relieved by pulling out the limiting bolt, the clamping rod is automatically clamped with the lock hole under the action of the spring, and locking and fixing of the first rotating rod are achieved. And sliding rotation caused by mistakenly touching the hand wheel is prevented.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage switchgear technology, specifically a mechanical interlocking device for high-voltage switchgear. Background Technology

[0002] High-voltage switchgear refers to the switchgear used in power systems for power generation, transmission, distribution, energy conversion and consumption, which plays a role in switching, control or protection. When high-voltage switchgear is closed, a mechanical interlocking device for high-voltage switchgear is required.

[0003] Chinese patent provides a locking device for switchgear, publication number CN217444249U, which includes a switchgear body and a locking assembly. The switchgear body is hinged to a cabinet door. The switchgear body has a first mounting groove and a second mounting groove adjacent to each other on the side near the cabinet door. The locking assembly is installed in the first mounting groove. The cabinet door has a plug-in block on the side near the second mounting groove. The locking assembly includes a housing, an electromagnet electrically connected to the power supply terminal of the switchgear, an L-shaped baffle, an armature, and a return spring.

[0004] The above-mentioned device has the advantages of simple structure and automatic interlocking. However, the use of an electromagnet structure increases energy consumption and has low linkage, resulting in a single function. Therefore, it is necessary to provide a mechanical interlocking device for high-voltage switchgear. Utility Model Content

[0005] The purpose of this utility model is to provide a mechanical interlocking device for high-voltage switchgear, so as to solve the problems of increased energy consumption and limited functionality of existing devices.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a mechanical interlocking device for a high-voltage switchgear, comprising a switchgear and a cabinet door, wherein an interlocking mechanism is provided on the cabinet door; the interlocking mechanism includes a first rotating rod rotatably disposed through the cabinet door, one end of which is fixedly provided with a driving gear; two second rotating rods rotatably disposed on the inner side of the cabinet door, each second rotating rod being fixedly provided with a driven gear meshing with the driving gear; a slide rail is fixedly disposed on the inner side of the cabinet door, and a sliding plate is slidably connected within the slide rail; the sliding... A toothed plate that meshes with the driven gear is fixedly installed on the card plate. A slot for engaging with the sliding card plate is provided inside the switch cabinet. A handwheel is fixedly installed at the other end of the first rotating rod. A lock hole is provided on the first rotating rod. A fixed cylinder is fixedly installed on the outside of the cabinet door. A movable cavity is provided inside the fixed cylinder. A moving block is slidably connected inside the movable cavity. A locking rod that matches the lock hole is fixedly installed on one side of the moving block. A guide rod is fixedly installed on the other side of the moving block. A spring is sleeved on the guide rod and fixedly installed between the movable cavity and the moving block.

[0007] Preferably, sliders are fixedly provided on both sides of the sliding plate, and a limit groove is provided on the slide rail, with the sliders slidably connected to the limit groove.

[0008] Preferably, the locking rod slides through the movable cavity and engages with the lock hole, the guide rod slides through the movable cavity and is fixedly connected to the limit block, and a pull ring is fixedly provided on the limit block.

[0009] Preferably, a first fixing block and a second fixing block are fixedly provided on the outer side of the cabinet door. A limit bolt is slidably provided on the first fixing block, and a limit hole is provided on the second fixing block for insertion into the limit bolt.

[0010] Preferably, the switch cabinet is equipped with electrical equipment, a rain cover is fixedly installed on the switch cabinet, and a viewing window is provided on the cabinet door. The rain cover can prevent rainwater from entering the switch cabinet, and the viewing window can facilitate the operator to observe the electrical equipment.

[0011] Preferably, ventilation openings are provided at both ends of the switch cabinet, and dustproof nets are fixedly installed inside the ventilation openings. The ventilation openings provide heat dissipation for the switch cabinet, and the dustproof nets prevent external dust from entering the switch cabinet.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1) This high-voltage switchgear mechanical interlocking device rotates the first rotating rod by turning the handwheel, causing the driving gear to rotate. This allows the two driven gears meshing with the driving gear to rotate synchronously in opposite directions. As a result, the toothed plate meshing with the driven gears can drive the sliding plate to move along the slide rail. When the sliding plate is moved out of the slot, the cabinet door can be unlocked. When the cabinet door is closed, the handwheel is turned in the opposite direction, causing the two sliding plates to reset and re-engage with the slot. The device has high interlocking strength and is easy and convenient to operate.

[0014] 2) The mechanical interlocking device of this high-voltage switchgear, by pulling the pull ring, causes the guide rod to move through the moving block and drive the locking rod to disengage from the lock hole, thereby releasing the first rotating rod from the locked state. When the pull ring is pulled to the limit bolt, the limit bolt passes through the pull ring and is inserted into the limit hole, so that the locking rod can be locked. When the cabinet door is closed, the lock on the pull ring is released by pulling out the limit bolt, so that the locking rod can automatically engage with the lock hole under the spring's rebound action, thereby achieving the locking and fixing of the first rotating rod and preventing accidental contact with the handwheel that would cause slippage. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a mechanical interlocking device for a high-voltage switchgear according to an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the switch cabinet in an embodiment of this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the locking mechanism in an embodiment of the present utility model;

[0018] Figure 4 As an embodiment of this utility model Figure 3 Enlarged view of the structure at point A in the middle;

[0019] Figure 5 This is a cross-sectional view of the fixed cylinder in an embodiment of this utility model.

[0020] In the diagram: 1. Switch cabinet; 2. Electrical equipment; 3. Cabinet door; 4. Viewing window; 5. Rain cover; 6. Ventilation opening; 7. Dustproof net; 8. Locking mechanism; 801. First rotating rod; 802. Driving gear; 803. Second rotating rod; 804. Driven gear; 805. Slide rail; 806. Sliding plate; 807. Sliding block; 808. Limiting groove; 809. Tooth plate; 810. Slot; 811. Handwheel; 812. Lock hole; 813. Fixed cylinder; 814. Movable cavity; 815. Moving block; 816. Locking rod; 817. Guide rod; 818. Spring; 819. Limiting block; 820. Pull ring; 821. First fixed block; 822. Limiting bolt; 823. Second fixed block; 824. Limiting hole. Detailed Implementation

[0021] 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.

[0022] Combination Figures 1-5 A mechanical interlocking device for a high-voltage switchgear includes a switchgear 1 and a cabinet door 3. Electrical equipment 2 is installed inside the switchgear 1. A rain cover 5 is fixedly installed on the switchgear 1. A viewing window 4 is opened on the cabinet door 3. Ventilation openings 6 are opened at both ends of the switchgear 1. A dustproof net 7 is fixedly installed inside the ventilation opening 6. An interlocking mechanism 8 is installed on the cabinet door 3.

[0023] See Figures 2-4Furthermore, the locking mechanism 8 includes a first rotating rod 801 that is rotatably mounted through the cabinet door 3. One end of the first rotating rod 801 is fixedly mounted with a drive gear 802. Two second rotating rods 803 are rotatably mounted on the inner side of the cabinet door 3. A driven gear 804 that meshes with the drive gear 802 is fixedly mounted on the second rotating rod 803. A slide rail 805 is fixedly mounted on the inner side of the cabinet door 3. A sliding plate 806 is slidably connected inside the slide rail 805. A toothed plate 809 that meshes with the driven gear 804 is fixedly mounted on the sliding plate 806. A slot 810 that engages with the sliding plate 806 is provided inside the switch cabinet 1. Slider blocks 807 are fixedly mounted on both sides of the sliding plate 806. A limit groove 808 is provided on the slide rail 805. The slider 807 is slidably connected to the limit groove 808.

[0024] Specifically, by rotating the first lever 801 through the handwheel 811, the driving gear 802 is rotated, causing the two driven gears 804 meshing with the driving gear 802 to rotate synchronously in opposite directions. This allows the toothed plate 809 meshing with the driven gears 804 to drive the sliding plate 806 to move along the slide rail 805. When the sliding plate 806 is moved to disengage from the slot 810, the cabinet door 3 can be unlocked. When the cabinet door 3 is closed, the handwheel 811 is rotated in the opposite direction, causing the two sliding plates 806 to reset and re-engage with the slot 810. The locking strength is high and the operation is simple and convenient.

[0025] See Figure 5 Furthermore, a handwheel 811 is fixedly installed at the other end of the first rotating rod 801. A lock hole 812 is provided on the first rotating rod 801. A fixed cylinder 813 is fixedly installed on the outside of the cabinet door 3. A movable cavity 814 is provided inside the fixed cylinder 813. A moving block 815 is slidably connected inside the movable cavity 814. A locking rod 816 adapted to the lock hole 812 is fixedly installed on one side of the moving block 815. A guide rod 817 is fixedly installed on the other side of the moving block 815. A locking rod 816 fixedly installed in the movable cavity 814 is sleeved on the guide rod 817. The spring 818 between 4 and the moving block 815, the locking rod 816 slides through the movable cavity 814 and engages with the lock hole 812, the guide rod 817 slides through the movable cavity 814 and is fixedly connected to the limit block 819, the limit block 819 is fixedly provided with a pull ring 820, the outer side of the cabinet door 3 is fixedly provided with a first fixing block 821 and a second fixing block 823, the first fixing block 821 is slidably provided with a limit bolt 822, and the second fixing block 823 is provided with a limit hole 824 that is inserted into the limit bolt 822.

[0026] Specifically, by pulling the pull ring 820, the guide rod 817 drives the locking rod 816 to disengage from the lock hole 812 via the moving block 815, thereby releasing the first rotating rod 801 from its locked state. When the pull ring 820 is pulled to the limit bolt 822, the limit bolt 822 passes through the pull ring 820 and is inserted into the limit hole 824, so that the locking rod 816 can be locked. When the cabinet door 3 is closed, the lock on the pull ring 820 is released by pulling out the limit bolt 822, so that the locking rod 816 can automatically engage with the lock hole 812 under the rebound action of the spring 818, thereby achieving the locking and fixing of the first rotating rod 801 and preventing accidental contact with the handwheel 811 that would cause it to slip.

[0027] In actual operation, when it is necessary to open the cabinet door 3 of switch cabinet 1, firstly, by pulling the pull ring 820, the guide rod 817 drives the locking rod 816 to disengage from the lock hole 812 through the moving block 815, so that the first rotating rod 801 is unlocked. When the pull ring 820 is pulled to the limit bolt 822, the limit bolt 822 passes through the pull ring 820 and is inserted into the limit hole 824, so that the locking rod 816 can be locked. By rotating the first rotating rod 801 through the handwheel 811, the driving gear 802 is rotated, so that the two driven gears 804 meshed with the driving gear 802 can rotate synchronously in opposite directions, so that the toothed plate 809 meshed with the driven gear 804 can drive the sliding plate 806 to move along the slide rail 805. When the sliding plate 806 is moved to disengage from the slot 810, the cabinet door 3 can be unlocked, so that the cabinet door 3 can be opened to operate the electrical equipment 2.

[0028] When the cabinet door 3 is closed, the handwheel 811 is rotated in the reverse direction, causing the two sliding plates 806 to reset and re-engage with the slot 810. At this time, the locking hole 812 on the first rotating rod 801 is reset. By pulling out the limit bolt 822, the locking of the pull ring 820 is released, allowing the locking rod 816 to automatically engage with the locking hole 812 under the rebound action of the spring 818, thereby locking and fixing the first rotating rod 801 and preventing accidental contact with the handwheel 811 that could cause slippage.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanical interlocking device for a high-voltage switchgear, comprising a switchgear (1) and a cabinet door (3), characterized in that: The cabinet door (3) is equipped with a locking mechanism (8); The locking mechanism (8) includes a first rotating rod (801) that is rotatably mounted through the cabinet door (3). One end of the first rotating rod (801) is fixedly mounted with a drive gear (802). Two second rotating rods (803) are rotatably mounted on the inner side of the cabinet door (3). A driven gear (804) that meshes with the drive gear (802) is fixedly mounted on the second rotating rod (803). A slide rail (805) is fixedly mounted on the inner side of the cabinet door (3). A sliding plate (806) is slidably connected in the slide rail (805). A toothed plate (809) that meshes with the driven gear (804) is fixedly mounted on the sliding plate (806). A slot (810) that engages with the sliding plate (806) is opened in the switch cabinet (1). A handwheel (811) is fixedly installed at the other end of the first rotating rod (801). A lock hole (812) is opened on the first rotating rod (801). A fixed cylinder (813) is fixedly installed on the outside of the cabinet door (3). A movable cavity (814) is opened inside the fixed cylinder (813). A movable block (815) is slidably connected inside the movable cavity (814). A locking rod (816) adapted to the lock hole (812) is fixedly installed on one side of the movable block (815). A guide rod (817) is fixedly installed on the other side of the movable block (815). A spring (818) is sleeved on the guide rod (817) and fixedly installed between the movable cavity (814) and the movable block (815).

2. The mechanical interlocking device for a high-voltage switchgear according to claim 1, characterized in that: Both sides of the sliding plate (806) are fixedly provided with sliders (807), and the slide rail (805) is provided with a limiting groove (808). The sliders (807) are slidably connected to the limiting grooves (808).

3. The mechanical interlocking device for a high-voltage switchgear according to claim 1, characterized in that: The locking rod (816) slides through the movable cavity (814) and engages with the locking hole (812). The guide rod (817) slides through the movable cavity (814) and is fixedly connected to the limiting block (819). A pull ring (820) is fixedly provided on the limiting block (819).

4. A mechanical interlocking device for a high-voltage switchgear according to claim 3, characterized in that: The cabinet door (3) is fixedly provided with a first fixing block (821) and a second fixing block (823). A limit bolt (822) is slidably provided on the first fixing block (821), and a limit hole (824) is provided on the second fixing block (823) for insertion into the limit bolt (822).

5. A mechanical interlocking device for a high-voltage switchgear according to claim 1, characterized in that: Electrical equipment (2) is installed inside the switch cabinet (1). A rain cover (5) is fixedly installed on the switch cabinet (1). A viewing window (4) is opened on the cabinet door (3).

6. A mechanical interlocking device for a high-voltage switchgear according to claim 1, characterized in that: Ventilation openings (6) are provided at both ends of the switch cabinet (1), and a dustproof net (7) is fixedly installed inside the ventilation opening (6).

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