Interlocking mechanism for high-voltage cable chamber door of environment-friendly gas cabinet

Abstract

The utility model discloses an interlocking mechanism for a high-voltage cable chamber door of an environment-friendly gas cabinet, and relates to the technical field of interlocking of environment-friendly gas cabinets. The interlocking device comprises a grounding switch operating shaft, an interlocking transmission plate, an interlocking rod and an interlocking lock catch, the interlocking lock catch is matched with a lower door hanging lock catch with a semicircular opening at the top of the lower door plate of the high-voltage cable chamber door; a baffle plate is vertically arranged at the rear part of the interlocking transmission plate; a cam propped against the baffle plate is arranged on the grounding switch operation shaft; compared with flexible connection interlocking, the interlocking device is better in stability, smoother in action and high in durability; the operation handle is matched with the end portion of the grounding switch operation shaft to rotate, lifting of the corresponding interlocking rod is achieved, opening and closing of the lower door plate are achieved, and compared with an existing hard connection interlocking mechanism, the structure is simpler, and control is easier and more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental protection gas cabinet interlocking, in particular to an interlocking mechanism for a high-voltage cable room door of an environmental protection gas cabinet. Background Art

[0002] Environmental gas cabinet is a kind of equipment that uses environmental gas as insulating medium, which is designed to reduce the impact on the environment and improve safety. This equipment is widely used in power systems, especially in places where high insulation and low maintenance are required. The design and manufacture of environmental gas cabinets follow strict environmental standards to ensure that they will not cause harm to the environment and human health during operation.

[0003] For environmental protection gas cabinets, the lower door interlock is an important part of the five-protection interlock. The interlock is a safety mechanism for controlling the switch of the cabinet door. It is mainly used to prevent the staff from operating the cabinet door without cutting off the power supply or stopping the equipment in the cabinet, causing dangerous accidents such as electric shock and explosion. During operation, the interlock device will lock the cabinet door and will not unlock it until all relevant operation steps are completed and confirmed, ensuring the safe operation of the equipment. Existing technologies include soft interlock and hard interlock. The soft interlock is specifically composed of a wire rope, a hose, a slider and a locking rod, which has poor protection against misoperation and low stability. The interlocking mechanism and the gas filling cabinet disclosed in CN116580984A are specifically designed by designing a new gas filling cabinet and adding a complex structure consisting of a locking part and two linkage parts in the gas filling cabinet; another example is the interlocking mechanism of the switch cabinet grounding switch and the cable room door disclosed in CN103093984B, which is also relatively complex in structure and is not closely combined with the existing ordinary environmental protection gas cabinet structure such as SF6; therefore, the present technical solution proposes an interlocking mechanism for the high-voltage cable room door of the environmental protection gas cabinet that is simple in structure and combined with the existing ordinary environmental protection gas cabinet structure. Utility Model Content

[0004] The utility model provides an interlocking mechanism for a high-voltage cable room door of an environmentally friendly gas cabinet, which solves the above problems.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses an interlocking mechanism for a high-voltage cable room door of an environmental gas cabinet, which is arranged at the bottom of a circuit breaker cabinet of the environmental gas cabinet and directly above the high-voltage cable room door. The interlocking mechanism comprises an earthing switch operating shaft coaxially connected to a deflection block on a spring reset mechanism, an interlocking transmission plate installed at the ends of two positioning rods for upper and lower limit positions, an interlocking rod vertically fixedly installed at the bottom of the interlocking transmission plate, and an interlocking lock buckle of a double-ring structure arranged at the bottom end of the interlocking rod;

[0007] The interlocking lock is matched with the lower door padlock of the semicircular opening on the top of the lower door plate of the high-voltage cable room door; a baffle is vertically arranged at the rear of the interlocking transmission plate, and a cam that contacts the baffle is installed on the operating shaft of the grounding switch.

[0008] Furthermore, the surface of the interlocking transmission plate is provided with two oval-shaped limiting holes in the upper direction of movement, the positioning rod passes through the oval-shaped limiting holes and limiting convex rings are provided at the front and back, so that the interlocking transmission plate can be lifted and lowered under the rotation of the cam.

[0009] Furthermore, the grounding switch operating shaft passes through a through hole on the surface of the interlocking transmission plate, and a rotating operating joint matching with an operating handle is provided at the end of the grounding switch operating shaft, and a flip cover is provided on the front panel of the grounding switch operating shaft.

[0010] Furthermore, the spring return mechanism is installed on the inner wall of the environmental protection gas cabinet using a fixed rod, and includes a mounting block with an arc-shaped groove installed on the operating shaft of the grounding switch and another operating shaft, a crank connection assembly connected to the two mounting blocks and limited by the arc-shaped groove, and a compression spring assembly with a telescopic sleeve rod and a compression spring hingedly installed between the two mounting blocks.

[0011] Furthermore, a long notch is provided on the back of the lower door panel, which is engaged with the protrusion on the front of the hanging block of the high-voltage cable room door.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] (1) This technical solution adopts hard-connected components such as the lower door padlock, interlock lock, interlock rod, interlock transmission plate, and earthing switch operating shaft. Compared with the soft-connected interlock, it has better stability, smoother operation, and stronger durability;

[0014] (2) The technical solution is specifically configured such that a cam on the operating shaft of the grounding switch is in contact with a baffle on the interlocking transmission plate. The operating handle is rotated in coordination with the end of the operating shaft of the grounding switch to realize the lifting and lowering of the corresponding interlocking rod, thereby opening and closing the lower door panel. Compared with the existing hard-connected interlocking mechanism, the structure is simpler and the operation is simpler and more convenient.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic structural diagram of an interlocking mechanism for a high-voltage cable room door of an environmentally friendly gas cabinet installed in the environmentally friendly gas cabinet according to the utility model;

[0018] Figure 2 for Figure 1 The schematic diagram of the structure after removing the front panel;

[0019] Figure 3 for Figure 2 The main view of the structure;

[0020] Figure 4 for Figure 3 A partial enlarged view of position A in the middle;

[0021] Figure 5 This is a structural schematic diagram of the interlocking mechanism for the high-voltage cable room door of an environmental gas cabinet and the lower door panel in accordance with the technical solution;

[0022] Figure 6 for Figure 5 A magnified view of the local position of the middle interlocking mechanism;

[0023] Figure 7 for Figure 6 A schematic diagram of the structure in which the operating shaft of the earthing switch with a cam cooperates with the baffle;

[0024] Figure 8 It is a schematic diagram of the structure of an interlocking rod with an interlocking lock buckle;

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1-lower door panel, 102-lower door padlock buckle, 103-interlocking lock buckle, 104-interlocking rod, 105-interlocking transmission plate, 1051-positioning rod, 1052-ovular limiting hole, 1053-through hole, 1054-baffle, 106-earthing switch operating shaft, 1061-flip cover, 107-cam, 108-long notch, 2-crank connecting assembly, 3-compression spring assembly, 5-fixing rod, 6-hook block. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that terms such as "end", "bottom", "vertical", "rear", "vertical", "front and back" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] See also Figure 1-8 As shown, the utility model is an interlocking mechanism for the high-voltage cable room door of an environmental gas cabinet, which is arranged below the circuit breaker cabinet of the environmental gas cabinet and directly above the high-voltage cable room door. This specific embodiment is applied to SF6 ordinary environmental gas cabinets to replace the existing soft interlock. The interlocking mechanism includes an earthing switch operating shaft 106 coaxially connected to the deflection block on the spring reset mechanism, an interlocking transmission plate 105 installed at the ends of two positioning rods 1051 for upper and lower limit, an interlocking rod 104 vertically fixedly installed at the bottom of the interlocking transmission plate 105, and an interlocking lock buckle 103 of a double ring structure arranged at the bottom end of the interlocking rod 104; the spring reset mechanism is specifically shown in Figure 5 As shown;

[0030] The interlocking lock 103 cooperates with the lower door padlock 102 of the semicircular opening on the top of the lower door panel 1 of the high-voltage cable room door; a baffle 1054 is vertically provided at the rear of the interlocking transmission plate 105, and a cam 107 that conflicts with the baffle 1054 is installed on the grounding switch operating shaft 106.

[0031] Among them, the surface of the interlocking transmission plate 105 is provided with two oval-shaped limiting holes 1052 in the upper direction of movement, the positioning rod 1051 passes through the oval-shaped limiting holes 1052 and is provided with limiting convex rings at the front and back, so that the interlocking transmission plate 105 can be raised and lowered under the rotation of the cam 107.

[0032] Among them, the grounding switch operating shaft 106 passes through the through hole 1053 on the surface of the interlocking transmission plate 105, and the end of the grounding switch operating shaft 106 is provided with a rotating operating joint that matches the operating handle. The grounding switch operating shaft 106 is located on the front panel and is provided with a flip cover 1061. When operating, the operating handle is inserted into the rotating operating joint by opening the flip cover 1061 to engage with the rotating operating joint and perform a rotating action; the corresponding groove at the front end of the operating handle is based on the structure of the corresponding rotating operating joint and is adaptively selected. The specific shape is not limited by this technical solution, such as a hexagonal shape.

[0033] Among them, Figure 5As shown, the spring return mechanism is installed on the inner wall of the environmental protection gas cabinet using a fixed rod 5, including a mounting block with an arc-shaped groove installed on the grounding switch operating shaft 106 and another operating shaft, a crank connection component 2 connected to the two mounting blocks and limited by the arc-shaped groove, and a compression spring component 3 with a telescopic sleeve rod and a compression spring hingedly installed between the two mounting blocks.

[0034] Among them, a long groove 108 is provided on the back of the lower door panel 1, which cooperates with the protrusion on the front of the hanging block 6 of the high-voltage cable room door, so that after the interlocking rod 105 rises, the lower door panel 1 can be lifted up, so that the interlocking lock 103 and the corresponding semi-circular lower door pad lock 102 are disengaged, thereby removing the lower door panel 1.

[0035] The working mode of this technical solution is as follows:

[0036] When the grounding switch of the lower isolation zone of the upper circuit breaker is used, when the grounding switch is in the closed state, the lower door panel 1 closes the lower door padlock 102, buckles the interlocking fastener 103, and drives the interlocking rod 104 to move vertically downward. At this time, the grounding switch operating shaft 106 is unlocked, and the grounding switch can be opened and closed by the operating handle. When the grounding switch is in the open state, the transmission shaft of the mechanism itself drives the cam 107 in the interlocking component to press down and support the upper end of the interlocking rod 104. At this time, the lower door panel 1 cannot be opened, and the grounding switch operating shaft 106 When the earthing switch is in the unlocked state, the transmission shaft of the mechanism itself drives the cam 107 in the interlocking assembly to move upward. At this time, the lower door panel 1 is slightly moved upward and pulled outward, and the lower door padlock buckle 102 is disengaged from the interlocking lock buckle 103. The interlocking rod 104 is reset and moved upward by the spring reset mechanism. At this time, the earthing switch operating shaft 106 is locked and the operating handle cannot be inserted. The interlocking mechanism for the high-voltage cable room door of an environmentally friendly gas cabinet according to the technical solution is simple in structure, good in stability, smooth in movement, stable in stroke and good in durability.

[0037] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An interlocking mechanism for a high-voltage cable room door of an environmental gas cabinet, arranged below the circuit breaker cabinet of the environmental gas cabinet and directly above the high-voltage cable room door, characterized in that: The interlocking mechanism comprises an earthing switch operating shaft (106) coaxially connected to a deflection block on a spring reset mechanism, an interlocking transmission plate (105) installed at the ends of two positioning rods (1051) for upper and lower limit, an interlocking rod (104) vertically fixedly installed at the bottom of the interlocking transmission plate (105), and an interlocking lock buckle (103) of a double ring structure arranged at the bottom end of the interlocking rod (104); The interlocking lock catch (103) cooperates with the lower door padlock catch (102) of the semicircular opening at the top of the lower door plate (1) of the high-voltage cable room door; a baffle (1054) is vertically provided at the rear of the interlocking transmission plate (105), and a cam (107) that contacts the baffle (1054) is installed on the grounding switch operating shaft (106).

2. The interlocking mechanism for the high-voltage cable room door of an environmental gas cabinet according to claim 1 is characterized in that: The surface of the interlocking transmission plate (105) is provided with two oval-shaped limiting holes (1052) in the upper direction of movement, and the positioning rod (1051) passes through the oval-shaped limiting holes (1052) and is provided with limiting convex rings at the front and back, so that the interlocking transmission plate (105) can be lifted and lowered under the rotation of the cam (107).

3. The interlocking mechanism for the high-voltage cable room door of an environmental gas cabinet according to claim 1 is characterized in that: The grounding switch operating shaft (106) passes through a through hole (1053) on the surface of the interlocking transmission plate (105), and a rotating operating joint matching with an operating handle is provided at the end of the grounding switch operating shaft (106), and a flip cover (1061) is provided on the front panel of the grounding switch operating shaft (106).

4. The interlocking mechanism for the high-voltage cable room door of an environmental gas cabinet according to claim 1 is characterized in that: The spring return mechanism is installed on the inner wall of the environmental protection gas cabinet using a fixed rod (5), and comprises a mounting block with an arc-shaped notch mounted on the operating shaft (106) of the earthing switch and another operating shaft, a crank connection component (2) connected to the two mounting blocks and limited in the arc-shaped notch, and a compression spring component (3) hingedly installed between the two mounting blocks and having a telescopic sleeve rod and a compression spring.

5. The interlocking mechanism for the high-voltage cable room door of an environmental gas cabinet according to claim 1 is characterized in that: The back of the lower door plate (1) is provided with a long notch (108) which is engaged with the protrusion at the front of the hanging block (6) of the high-voltage cable room door.

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