A dust-proof inspection door

Abstract

This utility model relates to the field of maintenance door technology and discloses a dust-proof maintenance door, including a flange-type door frame. The flange-type door frame has an outer maintenance opening and an inner maintenance opening on both sides. An outer door, which can be opened and closed and seals with the outer maintenance opening, is hinged to the outer side of the flange-type door frame. An inner door, adapted to the inner maintenance opening, is located at the inner maintenance opening position. A connecting unit is provided between the outer door and the inner door. When the outer door is opened or closed, it drives the inner door to move. In this utility model, when the outer door is closed, the inner door moves through the cooperation of a first connecting rod and a second connecting rod, closing the inner door at the inner maintenance opening position, thus sealing the inner maintenance opening and preventing dust from scattering at the flange neck of the maintenance door. When the outer door is opened for equipment maintenance later, no dust will scatter out, thereby reducing dust pollution to the external environment and improving the comfort and safety of maintenance personnel when using this maintenance door.

Description

Technical Field

[0001] This utility model relates to the field of inspection door technology, specifically an anti-dust inspection door. Background Technology

[0002] Inspection doors, as an important component of industrial equipment, pipelines, and enclosures, are mainly used for routine maintenance, inspection, and replacement of internal parts. In industries such as power, chemical, metallurgy, and machinery, the operating environment of equipment often contains large amounts of dust, particles, or corrosive gases.

[0003] Dust collectors are commonly used in engineering projects as waste gas treatment equipment. The maintenance doors of these devices often protrude from the equipment housing in the form of flanges. This results in a small gap inside the housing, allowing dust to accumulate at the flange neck of the maintenance opening. Over time, when the maintenance door is opened for internal inspection and maintenance, a large amount of dust may spill out from here, causing additional pollution. Therefore, there is an urgent need in this field to improve the maintenance doors to overcome the shortcomings of the existing technology. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a dust-proof maintenance door, which reduces dust pollution to the external environment and improves the comfort and safety of maintenance personnel when performing maintenance through the door.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dust-proof maintenance door, including a flange-type door frame, with an outer maintenance opening and an inner maintenance opening on both sides of the flange-type door frame, an outer door that can be opened and closed and is sealed with the outer maintenance opening is hinged to the outer side of the flange-type door frame, an inner door adapted to the inner maintenance opening is provided at the position of the inner maintenance opening, and a connecting unit is provided between the outer door and the inner door, so that the inner door moves when the outer door is opened and closed.

[0006] Preferably, the connecting unit includes a plurality of first connecting rods and second connecting rods, the first connecting rods being connected to the outer door, the second connecting rods being connected to the inner door, and the opposite ends of the first connecting rods and the second connecting rods being connected.

[0007] Preferably, the opposite ends of the first connecting rod and the second connecting rod are fixedly connected in a non-detachable manner, one end of the first connecting rod is fixedly connected to one side of the outer door in a non-detachable manner, and one end of the second connecting rod is fixedly connected to one side of the inner door in a non-detachable manner.

[0008] Preferably, the opposite ends of the first connecting rod and the second connecting rod are detachably fixedly connected, one end of the first connecting rod is detachably fixedly connected to one side of the outer door, and one end of the second connecting rod is detachably fixedly connected to one side of the inner door.

[0009] Preferably, the outer door has several first connecting holes threaded to the end of the first connecting rod on one side, and a first limiting nut is threaded to the side of the first connecting rod. The inner door has several second connecting holes threaded to the end of the second connecting rod on one side, and a second limiting nut is threaded to the side of the second connecting rod.

[0010] Preferably, a connecting sleeve is threaded between the opposing end sides of the first connecting rod and the second connecting rod, and a limiting unit for limiting the movement of the first connecting rod and the second connecting rod is provided inside the connecting sleeve.

[0011] Preferably, the limiting unit includes several tight-fitting limiting blocks disposed inside the connecting sleeve. The tight-fitting limiting blocks are adapted to the sides of the first connecting rod and the second connecting rod. Several movable grooves adapted to the tight-fitting limiting blocks are opened on the inner side wall of the connecting sleeve. An adjusting bolt is threaded through the outside of the connecting sleeve and has one end rotatably connected to one side of the tight-fitting limiting block. A third limiting nut is threadedly connected to the side of the adjusting bolt.

[0012] Preferably, one side of the inner door is in close contact with the outside of the inner inspection port, and a snap-fit ​​protrusion that snaps into the inner inspection port is fixedly connected to one side of the inner door.

[0013] Preferably, the inner door is provided with a first elastic sealing strip on the side near the inner access port, and the outer door is provided with a second elastic sealing strip that is adapted to the outer access port.

[0014] To address the shortcomings of existing technologies, this utility model provides a dust-proof maintenance door, overcoming the deficiencies of the prior art. The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, when the outer door is closed, the inner door is moved by the cooperation of the first connecting rod and the second connecting rod. The inner door closes at the inner inspection port position, sealing the inner inspection port and preventing dust from falling at the flange neck of the inspection door. When the outer door is opened for maintenance of the equipment later, no dust falls out, thereby reducing dust pollution to the external environment and improving the comfort and safety of maintenance personnel when performing maintenance through the inspection door.

[0016] 2. In this utility model, by setting a snap-fit ​​protrusion to snap into the inner inspection port, the dust accumulation effect at the inner inspection port position is improved, and the inner door is prevented from falling down for a long time. The first sealing strip and the second sealing strip are set to improve the sealing effect between the flange-type door frame and the inner and outer doors.

[0017] 3. In this utility model, the distance between the inner door and the outer door can be adjusted by rotating the connecting sleeve, the first connecting rod or the second connecting rod, and the position of the inner door can be adjusted to ensure the long-term sealing effect of the inner inspection port.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a structural schematic diagram of the entire utility model from another side view;

[0022] Figure 3 This is a schematic diagram of the overall vertical cross-section of the present invention;

[0023] Figure 4 This is a schematic diagram of the overall horizontal cross-section of the present invention;

[0024] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle;

[0025] Figure 6 for Figure 4 Enlarged structural diagram at point B;

[0026] Figure 7 for Figure 5 Enlarged structural diagram at point C.

[0027] In the diagram: 1. Flange-type door frame; 2. Outer door; 3. Inner door; 4. Connecting unit; 5. First connecting rod; 6. Second connecting rod; 7. First connecting hole; 8. Second connecting hole; 9. First limiting nut; 10. Second limiting nut; 11. Connecting sleeve; 12. Moving groove; 13. Tightly abutting limiting block; 14. Adjusting bolt; 15. Third limiting nut; 16. Snap-fit ​​protrusion; 17. First sealing strip; 18. Second sealing strip; 20. External inspection port; 21. Internal inspection port. Detailed Implementation

[0028] 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.

[0029] Example 1

[0030] Please see Figures 1-7 A dust-proof maintenance door includes a flange-type door frame 1. The flange-type door frame 1 has an outer maintenance opening 20 and an inner maintenance opening 21 on both sides. The outer door 2, which can be opened and closed and is sealed to the outer maintenance opening 20, is hinged to the outer side of the flange-type door frame 1. An inner door 3, adapted to the inner maintenance opening 21, is located at the inner maintenance opening 21. A connecting unit 4 is provided between the outer door 2 and the inner door 3. When the outer door 2 opens and closes, it drives the inner door 3 to move. The connecting unit 4 includes several first connecting rods 5 and second connecting rods 6. The first connecting rods 5 are connected to the outer door 2, and the second connecting rods 6 are connected to the inner door 3. The ends of the first connecting rods 5 and the second connecting rods 6 are connected to each other.

[0031] In this embodiment, the maintenance door is fixedly installed on the side of the equipment (such as a dust collector) via a mounting flange on the side of the flange-type door frame 1. A locking device (existing known technology, not shown in the figure) is provided between the flange-type door frame 1 and the outer door 2. When the outer door 2 is closed, the outer door 2 moves the inner door 3 through the cooperation of the first connecting rod 5 and the second connecting rod 6. The inner door 3 closes at the inner inspection port 21, sealing the inner inspection port 21 and preventing dust from falling onto the flange neck of the maintenance door. When the outer door 2 is opened for maintenance of the equipment later, no dust falls out, thereby reducing dust pollution to the external environment and improving the comfort and safety of maintenance personnel when performing maintenance through the maintenance door.

[0032] Example 2

[0033] Please see Figure 2 , Figure 3 and Figure 6 This embodiment includes the above embodiment, and further includes: the opposite ends of the first connecting rod 5 and the second connecting rod 6 are fixedly connected in a non-detachable manner; one end of the first connecting rod 5 is fixedly connected to one side of the outer door 2 in a non-detachable manner; one end of the second connecting rod 6 is fixedly connected to one side of the inner door 3 in a non-detachable manner; one side of the inner door 3 is tightly attached to the outside of the inner inspection port 21; one side of the inner door 3 is fixedly connected to a snap-fit ​​protrusion 16 that snaps into the inner inspection port 21; the side of the inner door 3 near the inner inspection port 21 is provided with an elastic first sealing strip 17; and the side of the outer door 2 is provided with an elastic second sealing strip 18 that is adapted to the outer inspection port 20.

[0034] The specific implementation method in this embodiment is as follows: In this embodiment, the outer door 2, the first connecting rod 5, the second connecting rod 6, and the inner door 3 are fixedly connected by welding, which has a high stability effect and extends the service life of the inspection door. The snap-fit ​​protrusion 16 snaps into the inner inspection port 21, which not only improves the dust accumulation effect at the inner inspection port 21, but also prevents the inner door 3 from falling down for a long time. The first sealing strip 17 and the second sealing strip 18 are set to improve the sealing effect between the flange door frame 1 and the inner door 3 and the outer door 2.

[0035] Example 3

[0036] Please see Figure 5 and Figure 7 This embodiment includes all the above embodiments, and further includes: the opposing ends of the first connecting rod 5 and the second connecting rod 6 are detachably fixedly connected; one end of the first connecting rod 5 is detachably fixedly connected to one side of the outer door 2; one end of the second connecting rod 6 is detachably fixedly connected to one side of the inner door 3; a plurality of first connecting holes 7 are provided on one side of the outer door 2, which are threadedly connected to the ends of the first connecting rod 5; a first limiting nut 9 is threadedly connected to the side of the first connecting rod 5; a plurality of second connecting holes 8 are provided on one side of the inner door 3, which are threadedly connected to the ends of the second connecting rod 6; a second limiting nut 10 is threadedly connected to the side of the second connecting rod 6; the first connecting rod 5... A connecting sleeve 11 is threaded between the opposing ends of the connecting rod 5 and the second connecting rod 6. The connecting sleeve 11 is provided with a limiting unit for limiting the first connecting rod 5 and the second connecting rod 6. The limiting unit includes several tight-fitting limiting blocks 13 provided in the connecting sleeve 11. The tight-fitting limiting blocks 13 are adapted to the sides of the first connecting rod 5 and the second connecting rod 6. Several moving grooves 12 adapted to the tight-fitting limiting blocks 13 are opened on the inner side wall of the connecting sleeve 11. An adjusting bolt 14 is threaded through the outside of the connecting sleeve 11 and has one end rotatably connected to one side of the tight-fitting limiting block 13. A third limiting nut 15 is threadedly connected to the side of the adjusting bolt 14.

[0037] The specific implementation method in this embodiment is as follows: In this embodiment, the first connecting rod 5 is threadedly connected to the first connecting hole 7, and the second connecting rod 6 is threadedly connected to the second connecting hole 8, which facilitates the later replacement of the inner door 3. During installation, one end of the first connecting rod 5 is threadedly connected to the position of the first connecting hole 7, and the first limiting nut 9 is locked. The connecting sleeve 11 is threadedly connected to the side of the first connecting rod 5, and one end of the second connecting rod 6 is threadedly connected to the position of the second connecting hole 8, and the second limiting nut 10 is locked. The connecting sleeve 11 is rotated in the opposite direction, and the two ends of the connecting sleeve 11 are threadedly connected to the ends of the first connecting rod 5 and the second connecting rod 6, respectively. By rotating the connecting sleeve 11, the first connecting... Rod 5 or the second connecting rod 6 can adjust the distance between the inner door 3 and the outer door 2. As the function of the inspection door seal decreases, the position of the inner door 3 can be adjusted to ensure the long-term sealing effect of the inner inspection port 21. Then, by rotating the adjusting bolt 14, the adjusting bolt 14 drives the tight-fitting limit block 13 to move in the moving groove 12. Several tight-fitting limit blocks 13 are tightly pressed against the sides of the first connecting rod 5 and the second connecting rod 6. The third limit nut 15 is locked to limit and fix the position between the connecting sleeve 11, the first connecting rod 5 and the second connecting rod 6. Since the distance between the inner door 3 and the outer door 2 can be adjusted and assembled, the applicability of the device is improved.

[0038] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 according to the specific circumstances.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dustproof access door, comprising a flange type door frame (1), the flange type door frame (1) is respectively provided with an outer access opening (20) and an inner access opening (21) on both sides, characterized in that, The flange-type door frame (1) has an outer door (2) that can be opened and closed and is sealed with the outer inspection port (20) on the outside. An inner door (3) that is adapted to it is provided at the position of the inner inspection port (21). A connecting unit (4) is provided between the outer door (2) and the inner door (3). When the outer door (2) is opened and closed, it drives the inner door (3) to move.

2. A dust-accumulation inspection door according to claim 1, wherein The connecting unit (4) includes several first connecting rods (5) and second connecting rods (6). The first connecting rods (5) are connected to the outer door (2), and the second connecting rods (6) are connected to the inner door (3). The first connecting rods (5) and the second connecting rods (6) are connected at opposite ends.

3. The dust-proof inspection door according to claim 1, characterized in that, The first connecting rod (5) and the second connecting rod (6) are fixedly connected at opposite ends. One end of the first connecting rod (5) is fixedly connected to one side of the outer door (2), and one end of the second connecting rod (6) is fixedly connected to one side of the inner door (3).

4. The dust-proof inspection door according to claim 1, characterized in that, The first connecting rod (5) and the second connecting rod (6) are detachably fixed at their opposite ends. One end of the first connecting rod (5) is detachably fixed to one side of the outer door (2), and one end of the second connecting rod (6) is detachably fixed to one side of the inner door (3).

5. A dust-proof inspection door according to claim 4, characterized in that, The outer door (2) has several first connecting holes (7) threaded to the end of the first connecting rod (5) on one side, and a first limiting nut (9) threaded to the side of the first connecting rod (5). The inner door (3) has several second connecting holes (8) threaded to the end of the second connecting rod (6) on one side, and a second limiting nut (10) threaded to the side of the second connecting rod (6).

6. A dust-proof inspection door according to claim 5, characterized in that, A connecting sleeve (11) is threaded between the opposing end sides of the first connecting rod (5) and the second connecting rod (6), and the connecting sleeve (11) is provided with a limiting unit for limiting the first connecting rod (5) and the second connecting rod (6).

7. A dust-proof inspection door according to claim 6, characterized in that, The limiting unit includes several tight-fitting limiting blocks (13) disposed in the connecting sleeve (11). The tight-fitting limiting blocks (13) are adapted to the sides of the first connecting rod (5) and the second connecting rod (6). Several moving grooves (12) adapted to the tight-fitting limiting blocks (13) are opened on the inner side wall of the connecting sleeve (11). An adjusting bolt (14) with one end rotatably connected to one side of the tight-fitting limiting block (13) is threaded through the outside of the connecting sleeve (11). A third limiting nut (15) is threadedly connected to the side of the adjusting bolt (14).

8. A dust-proof inspection door according to claim 1, characterized in that, The inner door (3) is tightly attached to the outside of the inner inspection port (21) on one side, and a snap-fit ​​protrusion (16) is fixedly connected to the inner door (3) on one side, which snaps into the inner inspection port (21).

9. A dust-proof inspection door according to claim 1, characterized in that, The inner door (3) is provided with a first elastic sealing strip (17) on the side near the inner access port (21), and the outer door (2) is provided with a second elastic sealing strip (18) that is adapted to the outer access port (20).

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