Upturning cabinet door structure of low-voltage room of inflatable ring main unit

Abstract

The utility model discloses a low-voltage chamber upturning cabinet door structure of an inflatable ring main unit, which belongs to the technical field of power equipment and comprises a cabinet frame, a reinforcing cross beam is arranged above an opening in the front of the cabinet frame and hinged with the upper side of a cabinet door through a hinge component, and ear plates are arranged on two sides of the back of the cabinet door. The two sides of the inner top face of the cabinet frame are provided with hanging lugs right opposite to the lug plates in position, and the hanging lugs are connected with the lug plates through multi-stage joints. According to the structure, the upturning cabinet door is adopted, compared with a traditional side opening type structure, 60% of lateral space occupation can be reduced, 30-degree, 60-degree and 90-degree three-stage positioning can be carried out on the cabinet door through the multi-stage joints, three modes of rapid overhaul, instrument operation and full-open maintenance are achieved, the cabinet door can be prevented from falling suddenly, and the structure has the advantages of being convenient, efficient and safe.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically to the upturnable cabinet door structure of the low-voltage compartment of an inflatable ring main unit. Background Technology

[0002] Gas-insulated ring main units (RMMs) are switchgear that uses gas as the insulating medium and are widely used in power distribution systems for the distribution, control, and protection of electrical energy. Their core feature is the sealing of high-voltage components (such as circuit breakers, disconnectors, and load switches) within a gas chamber filled with insulating gas, significantly improving the equipment's insulation performance and reliability. Existing RMMs often use side-opening doors in the low-voltage compartment, achieved through side hinges. This structure requires rotating the door outwards by more than 90° to open, occupying operating space on both sides. In confined power distribution rooms, this can easily interfere with adjacent equipment, requiring maintenance personnel to operate sideways, making tool access extremely inconvenient. Furthermore, traditional doors lack effective positioning when opened at large angles, posing a safety hazard due to gravity-induced swinging. A new structure is needed to address these issues. Utility Model Content

[0003] To address the aforementioned issues, this utility model proposes a low-voltage compartment flip-up cabinet door structure for an inflatable ring main unit, comprising a cabinet frame, a reinforcing beam above the opening on the front of the cabinet frame, the reinforcing beam being hinged to the upper side of the cabinet door via a hinge assembly, ear plates on both sides of the reverse side of the cabinet door, and drooping ears on both sides of the inner top surface of the cabinet frame, which are directly opposite the ear plates, and the drooping ears are connected to the ear plates via multi-stage joints.

[0004] Furthermore, the multi-stage joint includes straight strips, with four straight strips hinged end to end by rivets. The head of the first straight strip is hinged to the ear, and the tail of the last straight strip is hinged to the ear plate.

[0005] Furthermore, the hinge assembly includes pin cylinders, several of which are welded to the reinforcing beam and the upper side of the cabinet door, with the welding points between each pin cylinder fitting together, and the pin passing through the gaps between the pin cylinders.

[0006] Furthermore, the front opening side of the cabinet frame is provided with an outward-turned sealing flange, which matches the edge of the cabinet door.

[0007] Furthermore, the cabinet frame has several pre-drilled mounting holes, and the cabinet frames are connected together to form a whole. The cabinet door has a pre-drilled window, and mounting screw holes are arranged around the pre-drilled window.

[0008] The beneficial effects of this utility model are as follows: This utility model adopts an upward-opening cabinet door, which can reduce the lateral space occupation by 60% compared with the traditional side-opening structure, avoid interference with adjacent equipment, and can achieve three-level positioning of the cabinet door at 30°, 60° and 90° through multi-level joints (the maximum flip angle can reach 120°), realizing three modes of quick inspection, instrument operation and full-open maintenance. It is not only conducive to the loading and unloading of tools, but also prevents the cabinet door from falling suddenly. It has the characteristics of convenience, efficiency and safety, and greatly improves human-machine efficiency. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the oblique structure of this utility model;

[0010] Figure 2 This is a front view structural diagram of the present utility model;

[0011] Figure 3 This is a side view of the structure of this utility model;

[0012] Figure 4 This is a side view of the multi-angle door opening of this utility model.

[0013] The reference numerals in the attached drawings are explained as follows: 1. Cabinet frame; 101. Reinforcing beam; 102. Lug; 103. Sealing flange; 104. Reserved mounting hole; 2. Cabinet door; 201. Ear plate; 202. Edge band; 203. Reserved window; 3. Straight strip; 4. Pin cylinder; 5. Pin. Detailed Implementation

[0014] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] like Figures 1 to 4 As shown, the low-voltage compartment of the inflatable ring main unit has a flip-up door structure, including a frame 1. The frame 1 has several pre-drilled mounting holes 104 for installing various high-voltage components. The frames 1 are connected in series to form a single unit. A reinforcing beam 101 is located above the front opening of the frame 1. The reinforcing beam 101 is hinged to the upper side of the door 2 via a hinge assembly. The hinge assembly includes pin cylinders 4. Several pin cylinders 4 are welded to the reinforcing beam 101 and the upper side of the door 2, with welding points between each pin cylinder 4 engaging. Pins 5 pass through the spaces between the pin cylinders 4. An outwardly flared sealing flange 103 is located on the side of the front opening of the frame 1. The sealing flange 103 engages with the reverse side edge 202 of the door 2. The door 2 has a pre-drilled window 203, with mounting screw holes around the perimeter for fixing the window assembly.

[0018] In this embodiment, ear plates 201 are provided on both sides of the reverse side of the cabinet door 2, and drooping ears 102 are provided on both sides of the inner top surface of the cabinet frame 1, which are directly opposite the positions of the ear plates 201. The drooping ears 102 are connected to the ear plates 201 through multi-level joints. The multi-level joints include straight strips 3. Four straight strips 3 are hinged end to end by rivets. The head of the first straight strip 3 is hinged to the drooping ear 102, and the tail of the last straight strip 3 is hinged to the ear plate 201. The tightness at each hinge point can be adjusted as needed.

[0019] The working principle of this utility model is as follows:

[0020] High-voltage components are installed into the cabinet frame 1 through the pre-drilled mounting holes 104. Detection window assemblies are installed at the pre-drilled windows 203 through the mounting screw holes. The cabinet door 2 is then closed for sealing, and insulating gas is injected into the cabinet. For quick maintenance, the cabinet door 2 is rotated to a 30° position; for instrument operation, it is rotated to a 60° position; and for full-open maintenance, it is rotated to over 90°. When the cabinet door 2 is open, the multi-stage joints on both sides provide positioning and support, allowing lightweight tools to be placed on the horizontally positioned door 2 for easy access. This invention achieves three opening modes through multi-stage joints, facilitating tool access and preventing the cabinet door 2 from suddenly falling. It is convenient, efficient, and safe, greatly improving human-machine efficiency.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A flip-up cabinet door structure for the low-voltage compartment of an inflatable ring main unit, comprising a cabinet frame (1), characterized in that: The cabinet frame (1) has a reinforcing beam (101) above the front opening. The reinforcing beam (101) is hinged to the upper side of the cabinet door (2) through a hinge assembly. The cabinet door (2) has ear plates (201) on both sides of the reverse side. The cabinet frame (1) has drooping ears (102) on both sides of the inner top surface that are directly opposite the ear plates (201). The drooping ears (102) are connected to the ear plates (201) through multi-level joints.

2. The low-voltage compartment flip-up cabinet door structure of the inflatable ring main unit according to claim 1, characterized in that: The multi-level joint includes a straight strip (3), four straight strips (3) are hinged together end to end by rivets, the head of the first straight strip (3) is hinged to the ear (102), and the tail of the last straight strip (3) is hinged to the ear plate (201).

3. The low-voltage compartment flip-up cabinet door structure of the inflatable ring main unit according to claim 1, characterized in that: The hinge assembly includes a pin cylinder (4), and several pin cylinders (4) are respectively welded to the upper side of the reinforcing beam (101) and the cabinet door (2). The welding points between each pin cylinder (4) are matched, and the pin (5) passes through each pin cylinder (4).

4. The low-voltage compartment flip-up cabinet door structure of the inflatable ring main unit according to claim 1, characterized in that: The cabinet frame (1) has an outward-turned sealing flange (103) on the side of the front opening, and the sealing flange (103) cooperates with the back edge (202) of the cabinet door (2).

5. The low-voltage compartment flip-up cabinet door structure of the inflatable ring main unit according to claim 1, characterized in that: The cabinet frame (1) has several reserved installation holes (104) on its frame. Each cabinet frame (1) is connected in series to form a whole. The cabinet door (2) has a reserved window (203) and the reserved window (203) is surrounded by installation screw holes.

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