Industrial electrical access door

Abstract

An industrial electrical maintenance door relates to the door technical field, one side of the manhole pipe base is hinged with one side of the flange cover, the other side of the manhole pipe base is connected with the other side of the flange cover through the locking mechanism, the glass cover plate is fixedly and sealingly arranged at the middle position of the flange cover through the cover plate fixing seat, the inner side of the flange cover and the outer side of the manhole pipe base are provided with corresponding annular sealing grooves, at least two sealing grooves are arranged, sealing rings are respectively arranged in the sealing grooves, the outer side of the manhole pipe base is provided with an air extraction groove between the positions corresponding to the annular sealing grooves, the inner side of the air extraction groove is provided with an air extraction hole leading to the outside of the manhole pipe base, and the outer end of the air extraction hole is fixedly provided with an air extraction pipe head.The utility model discloses at least two independent sealing rings are arranged, and the air extraction groove and the air extraction hole located between the sealing rings are combined, a unique double-sealing and vacuum enhancement system is formed, air between the two sealing rings is extracted through the air extraction pipe head, a negative pressure area is formed, and therefore the overall sealing effect is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of door technology, specifically an industrial electrical maintenance door. Background Technology

[0002] In industries such as power, chemical, and energy, access doors (also known as manholes) are typically installed on electrical equipment cabinets, reaction vessels, or pipelines to facilitate internal inspection, maintenance, and repair work. These access doors must have excellent sealing performance to prevent leakage of internal media (such as insulating gases, dust, corrosive gases, or pressure) and ensure normal equipment operation and production safety.

[0003] Currently, most common industrial access doors employ a single sealing ring or sealing ring structure. A locking mechanism presses the door cover firmly against the door seat, causing the sealing ring to elastically deform and achieve a seal. However, this single-seal structure has significant limitations: First, after long-term use, the sealing material inevitably ages, wears, or undergoes permanent deformation, leading to a decrease in sealing effectiveness; second, when there are pressure or temperature fluctuations inside the equipment, the pressure-bearing capacity of a single sealing interface is limited, making leakage prone to occur; third, once the sealing ring fails, the access door immediately loses its sealing function, lacking safety redundancy and potentially causing serious safety accidents or production interruptions.

[0004] In addition, for some applications with extremely high sealing requirements (such as SF6 electrical equipment maintenance doors), although more complex sealing structures or higher performance sealing materials are used, there are often problems such as complex structure, high cost or inconvenient maintenance, making it difficult to ensure reliability while taking into account economy and convenience. Utility Model Content

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide an industrial electrical maintenance door, which solves the problems of complex sealing structure, high cost or inconvenient maintenance, and difficulty in ensuring reliability while taking into account economy and convenience.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] An industrial electrical maintenance door, characterized in that it includes a flange cover, a manhole seat, and a glass cover plate. One side of the manhole seat is hinged to one side of the flange cover, and the other side of the manhole seat is connected to the other side of the flange cover via a locking mechanism. The glass cover plate is fixedly and sealed in the middle position of the flange cover via a cover plate fixing seat. The inner side of the flange cover and the outer side of the manhole seat are provided with corresponding annular sealing grooves. At least two sealing grooves are provided, and sealing rings are respectively provided in the sealing grooves. An air extraction groove is provided on the outer side of the manhole seat at the position between the annular sealing grooves. An air extraction hole leading to the outside of the manhole seat is provided on the inner side of the air extraction groove, and an air extraction pipe head is fixedly provided at the outer end of the air extraction hole.

[0008] In a preferred embodiment, one side of the flange cover and the manhole seat are respectively fixedly provided with interlocking ear plates, and the ear plates are provided with hinged rotating shafts.

[0009] In a preferred embodiment, the locking mechanism includes a fixed plate fixedly mounted on one side of the manhole seat, a U-shaped groove plate fixedly mounted on the flange cover at a position corresponding to the top plate of the pipe, a screw hinged to the fixed plate, an adjusting nut threadedly connected to the screw, an elastic washer mounted on the inner side of the adjusting nut and outside the screw, and the screw corresponding to the position of the U-shaped groove of the U-shaped groove plate.

[0010] In a preferred embodiment, the glass cover has two layers.

[0011] In a preferred embodiment, the inner side of the manhole seat is provided with uniformly arranged fixing holes.

[0012] In a preferred embodiment, the outer side of the adjusting nut is provided with anti-slip threads.

[0013] In a preferred embodiment, a handle is fixedly provided on the outer side of the flange cover.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes at least two independent sealing rings, combined with an extraction groove and extraction port located between them, to form a unique double-seal and vacuum-enhanced system. This design allows air to be extracted from between the two sealing rings through the extraction pipe head after the door is closed, creating a negative pressure zone, thereby significantly enhancing the overall sealing effect, effectively preventing media leakage, and achieving double protection. The glass cover plate installed in the middle of the flange provides a direct observation window, allowing for inspection of the equipment's internal condition without opening the door, improving operational safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the locking mechanism of this utility model;

[0018] Figure 3 This is a schematic diagram of the outer structure of the manhole tube seat of this utility model;

[0019] Figure 4 This is a schematic diagram of the inner structure of the flange cover of this utility model;

[0020] In the diagram: 1—Flange cover; 2—Manhole seat; 3—Glass cover; 4—Locking mechanism; 5—Cover plate fixing seat; 6—Annular sealing groove; 7—Ring; 8—Evacuation groove; 9—Evacuation hole; 10—Evacuation pipe head; 11—Ear plate; 12—Rotating shaft; 13—Fixing plate; 14—U-shaped groove plate; 15—Screw; 16—Adjusting nut; 17—Elastic washer; 18—Fixed mounting hole; 19—Handle; 20—Anti-slip thread. Detailed Implementation

[0021] The technical solution of this application will be further described in detail below with reference to specific embodiments.

[0022] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0023] like Figures 1-4 As shown,

[0024] An industrial electrical maintenance door includes a flange cover 1, a manhole seat 2, and a glass cover 3. One side of the manhole seat 2 is hinged to one side of the flange cover 1, and the other side of the manhole seat 2 is connected to the other side of the flange cover 1 via a locking mechanism 4. The glass cover 3 is fixedly and sealed in the middle position of the flange cover 1 via a cover fixing seat 5. At least two corresponding annular sealing grooves 6 are provided on the inner side of the flange cover 1 and the outer side of the manhole seat 2. Each sealing groove 6 contains a sealing ring 7. An air extraction groove 8 is provided on the outer side of the manhole seat 2 corresponding to the position between the annular sealing grooves 6. An air extraction hole 9 leading to the outside of the manhole seat 2 is provided on the inner side of the air extraction groove 8. An air extraction pipe head 10 is fixedly installed at the outer end of the air extraction hole 9. The main function of this invention is to form an openable and closable passage door, and to ensure airtightness by setting multiple layers of sealing rings 7. The air extraction groove 8 and the air extraction hole 9 located between the sealing rings 7 allow for vacuuming after closing, thereby further enhancing the sealing effect of the two sealing rings 7 and achieving double protection. The glass cover 3 is installed via the cover mounting bracket 5, providing an observation window. The entire door is locked via the locking mechanism 4.

[0025] The flange cover 1 and the manhole seat 2 are respectively fixedly provided with interlocking ear plates 11 on one side, and the ear plates 11 are provided with hinged rotating shafts 12. Through the cooperation of the ear plates 11 and the rotating shafts 12, the flange cover 1 can be hinged to the manhole seat 2, so that the opening and closing of the door is smooth and directional.

[0026] The locking mechanism 4 includes a fixing plate 13 fixedly mounted on one side of the manhole pipe seat 2, and a U-shaped groove plate 14 fixedly mounted on one side of the flange cover 1 corresponding to the position of the pipe top plate. A screw 15 is hinged to the fixing plate 13, and an adjusting nut 16 is threadedly connected to the screw 15. An elastic washer 17 is provided inside the adjusting nut 16 and outside the screw 15, with the screw 15 corresponding to the position of the U-shaped groove of the U-shaped groove plate 14. By rotating the adjusting nut 16, the door is securely locked. The function of the elastic washer 17 is to provide cushioning and maintain a stable preload during locking, preventing loosening.

[0027] The glass cover 3 has two layers. This improves the safety and reliability of the observation window, for example, it can temporarily maintain a seal even if one layer is damaged, and it also provides better thermal and sound insulation performance.

[0028] The manhole base 2 has evenly spaced mounting holes 18 on its inner side. The entire manhole base 2 can be fixedly installed onto external equipment or containers through the mounting holes 18, serving as a reference fixing component for the access door.

[0029] The outer side of the adjusting nut 16 is provided with anti-slip threads 20. This increases the friction when manually rotating the adjusting nut 16, preventing slippage and making it easier and more precise for the operator to tighten or loosen it.

[0030] A handle 19 is fixedly installed on the outer side of the flange cover 1. This provides the operator with a point of force to facilitate opening, closing, or moving the flange cover 1.

[0031] The preferred embodiments of this application have been described in detail above, but this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. An industrial electrical maintenance door, characterized in that, The device includes a flange cover (1), a manhole seat (2), and a glass cover plate (3). One side of the manhole seat (2) is hinged to one side of the flange cover (1), and the other side of the manhole seat (2) is connected to the other side of the flange cover (1) through a locking mechanism (4). The glass cover plate (3) is fixedly and sealed in the middle position of the flange cover (1) through a cover plate fixing seat (5). The inner side of the flange cover (1) and the outer side of the manhole seat (2) are provided with corresponding annular sealing grooves (6). There are at least two sealing grooves (6), and each sealing groove (6) is provided with a ring (7). The outer side of the manhole seat (2) is provided with an air extraction groove (8) corresponding to the position between the annular sealing grooves (6). The inner side of the air extraction groove (8) is provided with an air extraction hole (9) leading to the outside of the manhole seat (2). An air extraction pipe head (10) is fixedly provided at the outer end of the air extraction hole (9).

2. The industrial electrical maintenance door according to claim 1, characterized in that: The flange cover (1) and the manhole seat (2) are respectively fixedly provided with interlocking ear plates (11) on one side, and the ear plates (11) are provided with hinged rotating shafts (12).

3. An industrial electrical maintenance door according to claim 1, characterized in that: The locking mechanism (4) includes a fixing plate (13) fixedly installed on one side of the manhole pipe seat (2), a U-shaped groove plate (14) fixedly installed on one side of the flange cover (1) and corresponding to the position of the pipe top plate, a screw (15) hinged on the fixing plate (13), an adjusting nut (16) threadedly connected to the screw (15), an elastic washer (17) installed on the inner side of the adjusting nut (16) and located outside the screw (15), and the screw (15) corresponds to the position of the U-shaped groove of the U-shaped groove plate (14).

4. An industrial electrical maintenance door according to claim 1, characterized in that: The glass cover plate (3) has two layers.

5. An industrial electrical maintenance door according to claim 1, characterized in that: The manhole seat (2) is provided with fixed mounting holes (18) evenly arranged on the inner side.

6. An industrial electrical maintenance door according to claim 3, characterized in that: The adjusting nut (16) is provided with anti-slip threads (20) on the outside.

7. An industrial electrical maintenance door according to claim 1, characterized in that: A handle (19) is fixedly provided on the outer side of the flange cover (1).

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