Well lid structure of water leakage prevention telecommunication well

Abstract

The utility model belongs to the technical field of telecommunication well equipment, and discloses a water leakage prevention telecommunication well lid structure. The well lid structure of the telecommunication well comprises a well lid, the well lid comprises a well lid body and a first protruding part arranged on the periphery of the well lid body, and the other end of the first protruding part extends in the direction close to a well mouth of the telecommunication well; the central axis of the well seat coincides with the central axis of the well lid; comprising a well base body and a second protruding part arranged on the periphery of the well base body, and the other end of the second protruding part extends in the direction close to the well lid. When the well lid is installed on the well base, at least part of the first protruding part and at least part of the second protruding part stretch into the opposite part. According to the well lid structure, due to the fact that the first protruding part and the second protruding part are arranged in the mode that the first protruding part and the second protruding part are mutually nested and stretch in, installation between the well lid and the well base is more reliable, meanwhile, a closed channel used for preventing rainwater from flowing to a well opening is formed, and the overall water leakage prevention performance of the well lid structure is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of telecommunication well equipment, and specifically relates to a leak-proof telecommunication well cover structure. Background Art

[0002] A telecommunication well is an underground facility used for connecting, branching, turning, etc. of underground communication lines. Leakage accidents of telecommunication wells occur frequently, which may not only cause damage to communication equipment, affect communication quality, accelerate the corrosion and aging of telecommunication wells, and shorten their service life. More importantly, the leakage will also make the inside of the telecommunication well humid, increase the risk of electric shock, and pose a safety hazard to maintenance personnel. In the existing design methods of telecommunication well covers, most rely only on the gravity of the cover itself to be in close contact with the well seat to achieve the closure of the telecommunication well opening. However, the actual anti-leakage effect of this method is very limited. In case of heavy rain or local water accumulation, this design cannot well prevent rainwater from entering the telecommunication well opening.

[0003] Therefore, there is an urgent need to provide a leak-proof telecommunication well cover structure that can effectively prevent rainwater from entering the telecommunication well opening to overcome the above problems.

[0004] In view of this, this application is specifically proposed. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiency of unreliable anti-leakage performance of the existing telecommunication well covers, and provide a leak-proof telecommunication well cover structure.

[0006] To solve the above technical problems, the basic concept of the technical solution adopted by the utility model is: a leak-proof telecommunication well cover structure, covering the telecommunication well opening, includes:

[0007] A well cover, the well cover includes a well cover body and a first protruding portion provided on the periphery of the well cover body. One end of the first protruding portion away from the well cover body extends along a direction parallel to the central axis of the well cover body in the vertical direction and towards the direction close to the telecommunication well opening;

[0008] A well seat, the well seat covers and connects to the telecommunication well opening. In the vertical direction, the central axis of the well seat coincides with that of the well cover; the well seat includes a well seat body and a second protruding portion provided on the periphery of the well seat body. One end of the second protruding portion away from the well seat body extends along a direction parallel to the central axis of the well seat in the vertical direction and towards the direction close to the well cover; in the projection along the direction parallel to the central axis of the well seat in the vertical direction, the second protruding portion partially coincides with the first protruding portion;

[0009] When the manhole cover is installed on the manhole seat, at least a part of the first convex part and the second convex part extends into the other component respectively.

[0010] According to an embodiment of the present utility model, in a cross-section perpendicular to the extending direction of the first convex part, the cross-section of the first convex part is in an inverted "U" shape.

[0011] The first convex part includes:

[0012] A top frame, one end of the top frame is obliquely connected to the manhole cover body, and the other end of the top frame extends towards the direction close to the manhole seat.

[0013] A first inner frame, one end of the first inner frame is connected to one end of the top frame close to the manhole cover body, and the other end of the first inner frame extends along the central axis of the manhole cover body in the vertical direction and towards the direction close to the second convex part.

[0014] A first outer frame, the first outer frame is arranged in parallel with the first inner frame, one end of the first outer frame is connected to the other end of the top frame, and the extending end of the first outer frame is flush with the extending end of the first inner frame in the horizontal height.

[0015] According to an embodiment of the present utility model, in a cross-section perpendicular to the extending direction of the second convex part, the cross-section of the second convex part is in a "mountain" shape.

[0016] The second convex part includes:

[0017] A bottom frame, one end of the bottom frame is connected to the manhole seat body, the bottom frame is arranged in parallel with the manhole seat body, and the end of the bottom frame far from the manhole seat body extends towards the direction close to the central axis of the manhole seat in the vertical direction.

[0018] A second inner frame, the second inner frame is vertically connected to the end of the bottom frame far from the manhole seat body, and the other end of the second inner frame extends towards the direction close to the first convex part.

[0019] A second middle frame, the second middle frame is arranged in parallel with the second inner frame, the second middle frame is arranged on the side of the bottom frame where the second inner frame is arranged, and the extending end of the second middle frame is lower than the horizontal height where the extending end of the second inner frame is located.

[0020] A second outer frame, the second outer frame is arranged on the end of the bottom frame close to the manhole seat body, the second outer frame is arranged in parallel with the second middle frame; the second outer frame, the second middle frame and the second inner frame are arranged in sequence.

[0021] When the manhole cover is installed on the manhole seat, the first outer frame is inserted into the outer gap formed between the second outer frame and the second middle frame, and the first inner frame is inserted into the inner gap formed between the second inner frame and the second middle frame.

[0022] According to an embodiment of the present invention, wherein the extended end of the second middle frame abuts against one side of the top frame close to the manhole seat, and the extended end of the second inner frame abuts against one side of the manhole cover body close to the manhole seat;

[0023] Sealing strips are provided on the extended ends of the second middle frame and the second inner frame.

[0024] According to an embodiment of the present invention, wherein the first outer frame is inserted into the outer gap formed between the second outer frame and the second middle frame to form a first U-shaped groove that is unilaterally communicated with the outside atmosphere.

[0025] According to an embodiment of the present invention, wherein the first inner frame is inserted into the inner gap formed between the second inner frame and the second middle frame to form a completely enclosed second U-shaped groove.

[0026] According to an embodiment of the present invention, wherein the manhole seat further includes: a vertical frame, one end of the vertical frame is connected to one end of the manhole seat body away from the second convex portion, and the other end of the vertical frame extends in a direction away from the second convex portion.

[0027] According to an embodiment of the present invention, wherein an avoidance groove is provided on one side of the manhole cover body away from the manhole seat, and a lifting ring for opening or closing the manhole cover by grasping is provided in the avoidance groove.

[0028] According to an embodiment of the present invention, wherein a connecting portion is provided in the avoidance groove;

[0029] The lifting ring is rotatably connected to the manhole cover through the connecting portion.

[0030] After adopting the above technical solutions, the present invention has the following beneficial effects compared with the prior art:

[0031] 1) In the present invention, through the nested arrangement of the first convex portion and the second convex portion, not only makes the installation between the manhole cover and the manhole seat more reliable, but also forms a closed channel for preventing rainwater from flowing to the wellhead, improving the overall waterproof performance of the manhole cover structure;

[0032] 2) In the present utility model, by providing a sealing strip at the abutting position of the two protruding parts, a sealed space that is not communicated with the outside atmosphere is formed, which plays a role in preventing external rainwater from entering the well opening through the two protruding parts, and further improves the overall water leakage prevention performance of the manhole cover structure;

[0033] 3) In the present utility model, by storing a sealant in the second U-shaped groove, a more stringent blocking space is formed, so that the telecommunication well is not communicated with the outside atmosphere, improving the overall water leakage prevention performance of the manhole cover structure, and further playing a role in preventing rainwater from entering the telecommunication well.

[0034] The following further describes in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. Description of the Drawings

[0035] The accompanying drawings, as a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. Obviously, the accompanying drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0036] Figure 1 is the overall structural schematic diagram of the telecommunication well manhole cover structure in the embodiment of the present utility model;

[0037] Figure 2 is the structural schematic diagram of the component disassembly and assembly process of the telecommunication well manhole cover structure in the embodiment of the present utility model;

[0038] Figure 3 is the structural schematic diagram of the well seat in the embodiment of the present utility model;

[0039] Figure 4 is the structural sectional view of the well seat in the embodiment of the present utility model.

[0040] Description of the main elements in the figures:

[0041] 1. Manhole cover; 11. Manhole cover body; 12. First protruding part; 13. Top frame; 14. First inner frame; 15. First outer frame; 16. Avoidance groove; 17. Suspension ring; 18. Connecting component; 2. Well seat; 21. Well seat body; 22. Second protruding part; 23. Bottom frame; 24. Second inner frame; 25. Second middle frame; 26. Second outer frame; 27. Vertical frame; 3. Sealing strip.

[0042] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but are not used to limit the scope of the present utility model.

[0044] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0045] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] As Figures 1 to 4 shown, a leak-proof telecommunications well cover structure according to the present utility model is covered on the opening of the telecommunications well. The telecommunications well cover structure includes:

[0047] A well cover 1, which includes a well cover body 11 and a first protrusion 12 provided on the periphery of the well cover body 11. One end of the first protrusion 12 away from the well cover body 11 extends along a central axis parallel to the well cover body 11 in the vertical direction and towards the direction close to the opening of the telecommunications well.

[0048] A well seat 2, which covers and connects to the opening of the telecommunications well. In the vertical direction, the central axis of the well seat 2 coincides with that of the well cover 1. The well seat 2 includes a well seat body 21 and a second protrusion 22 provided on the periphery of the well seat body 21. One end of the second protrusion 22 away from the well seat body 21 extends along a central axis parallel to the well seat 2 in the vertical direction and towards the direction close to the well cover 1. In the projection along the central axis direction of the well seat 2 in the vertical direction, the second protrusion 22 partially coincides with the first protrusion 12.

[0049] When the well cover 1 is installed on the well seat 2, both the first protrusion 12 and the second protrusion 22 at least partially extend into the other component.

[0050] In the present utility model, through the arrangement that the first convex portion 12 and the second convex portion 22 are nested and inserted into each other, while making the installation between the manhole cover 1 and the manhole seat 2 more reliable, a closed channel that prevents rainwater from flowing to the wellhead is formed, further improving the overall water leakage prevention performance of the manhole cover structure.

[0051] In a specific implementation manner of this embodiment, the manhole cover body 11 is a cubic structural member. Correspondingly, the first convex portion 12 is a frame-shaped structural member arranged around the manhole cover body 11.

[0052] In another specific implementation manner of this embodiment, the manhole cover body 11 is a disc-shaped structural member (not shown in the figure). Correspondingly, the first convex portion 12 is an annular structural member arranged around the manhole cover body 11.

[0053] In a specific implementation manner of this embodiment, the manhole seat body 21 is a cubic structural member. Correspondingly, the second convex portion 22 is a frame-shaped structural member arranged around the manhole seat body 21.

[0054] In another specific implementation manner of this embodiment, the manhole seat body 21 is a disc-shaped structural member (not shown in the figure). Correspondingly, the second convex portion 22 is an annular structural member arranged around the manhole seat body 21.

[0055] Please refer to the attached Figure 2 and the attached Figure 4 , in a specific implementation manner of this embodiment, in a cross-section along the extension direction perpendicular to the first convex portion 12, the cross-section of the first convex portion 12 is an inverted "U" shape;

[0056] The first convex portion 12 includes:

[0057] A top frame 13, one end of the top frame 13 is obliquely connected to the manhole cover body 11, and the other end of the top frame 13 extends towards the direction close to the manhole seat 2;

[0058] A first inner frame 14, one end of the first inner frame 14 is connected to one end of the top frame 13 close to the manhole cover body 11, and the other end of the first inner frame 14 extends along the central axis of the manhole cover body 11 in the vertical direction and towards the direction close to the second convex portion 22;

[0059] A first outer frame 15, the first outer frame 15 is arranged in parallel with the first inner frame 14, one end of the first outer frame 15 is connected to the other end of the top frame 13, and the extending end of the first outer frame 15 is flush with the extending end of the first inner frame 14 in the horizontal height.

[0060] In a specific implementation manner of this embodiment, the thicknesses of the first inner frame 14 and the first outer frame 15 of the first protrusion 12 are 20 mm (referring to the widths of the first inner frame 14 and the first outer frame 15 shown under the sectional view attachment Figure 4 angle).

[0061] Please refer to attachment Figure 2 to attachment Figure 4 . In a specific implementation manner of this embodiment, in the cross-section along the direction perpendicular to the extension direction of the second protrusion 22, the cross-section of the second protrusion 22 is in a "mountain" shape;

[0062] The second protrusion 22 includes:

[0063] A bottom frame 23, one end of the bottom frame 23 is connected to the manhole seat body 21, the bottom frame 23 is arranged parallel to the manhole seat body 21, and the end of the bottom frame 23 away from the manhole seat body 21 extends in the direction towards the central axis of the manhole 2 in the vertical direction;

[0064] A second inner frame 24, the second inner frame 24 is vertically connected to the end of the bottom frame 23 away from the manhole seat body 21, and the other end of the second inner frame 24 extends in the direction towards the first protrusion 12;

[0065] A second middle frame 25, the second middle frame 25 is arranged parallel to the second inner frame 24, the second middle frame 25 is arranged on the side of the bottom frame 23 where the second inner frame 24 is provided, and the extending end of the second middle frame 25 is lower than the horizontal height where the extending end of the second inner frame 24 is located;

[0066] A second outer frame 26, the second outer frame 26 is arranged on the end of the bottom frame 23 close to the manhole seat body 21, the second outer frame 26 is arranged parallel to the second middle frame 25; the second outer frame 26, the second middle frame 25, and the second inner frame 24 are arranged in sequence;

[0067] When the manhole cover 1 is installed on the manhole seat 2, the first outer frame 15 is inserted into the outer gap formed between the second outer frame 26 and the second middle frame 25, and the first inner frame 14 is inserted into the inner gap formed between the second inner frame 24 and the second middle frame 25.

[0068] In a specific implementation manner of this embodiment, the thicknesses of the second inner frame 24, the second middle frame 25, and the second outer frame 26 of the second protrusion 22 are 20 mm (referring to the widths of the second inner frame 24, the second middle frame 25, and the second outer frame 26 shown under the sectional view attachment Figure 4 angle).

[0069] In a specific implementation manner of this embodiment, the inclination angle of the upper plane and / or the lower plane of the top frame 13 with respect to the horizontal line is equal to the inclination angle of the plane where the extension end of the second inner frame 24 is located and / or the plane where the extension end of the second middle frame 25 is located and / or the plane where the extension end of the second outer frame 26 is located with respect to the horizontal line.

[0070] In a specific implementation manner of this embodiment, the extension end of the second outer frame 26 is lower than the horizontal height where the extension end of the second middle frame 25 is located.

[0071] Please refer to the attached Figure 1 and the attached Figure 4 , in a specific implementation manner of this embodiment, the extension end of the second middle frame 25 abuts against one side of the top frame 13 close to the well seat 2, and the extension end of the second inner frame 24 abuts against one side of the manhole cover body 11 close to the well seat 2;

[0072] Sealing strips 3 are provided on the extension ends of the second middle frame 25 and the second inner frame 24.

[0073] In the present utility model, by providing the sealing strip 3, a sealed space not communicating with the outside atmosphere is formed, which plays a role in preventing external rainwater from entering the well opening through the two convex portions, and further improves the overall water leakage prevention performance of the manhole cover structure.

[0074] In another specific implementation manner of this embodiment, sealing strips are provided at the positions of the top frame 13 corresponding to the second middle frame 25 and at the positions of the manhole cover body 11 corresponding to the second inner frame 24.

[0075] In another specific implementation manner of this embodiment, sealing strips are provided at the positions of the top frame 13 corresponding to the second middle frame 25 and at the positions of the manhole cover body 11 corresponding to the second inner frame 24, and sealing strips 3 are also provided on the extension ends of the second middle frame 25 and the second inner frame 24.

[0076] In a specific implementation manner of this embodiment, the sealing strip 3 is a structural member made of rubber.

[0077] In a specific implementation manner of this embodiment, the sizes of the well seat 2 and the manhole cover 1 are designed and manufactured according to actual design requirements.

[0078] In a specific implementation manner of this embodiment, the sealing strip 3 is a rubber strip-shaped structural member with a thickness of 15 mm.

[0079] Please refer to the attached Figure 1 to the attached Figure 4, in a specific implementation manner of this embodiment, the first outer frame 15 is inserted into the outer gap formed between the second outer frame 26 and the second middle frame 25 to form a first U-shaped groove that is unilaterally communicated with the outside atmosphere.

[0080] When it rains outside, part of the rainwater flows into the first U-shaped groove through the gap between the second outer frame 26 and the first outer frame 15. When the rainwater in the first U-shaped groove reaches a certain level, due to the obstruction of the air in the first U-shaped groove (based on the principle that gas cannot be compressed under normal conditions), more rainwater is blocked from entering, thereby realizing the anti-leakage function of the manhole cover structure.

[0081] Please refer to the appendix Figure 1 to the appendix Figure 4 , in a specific implementation manner of this embodiment, the first inner frame 14 is inserted into the inner gap formed between the second inner frame 24 and the second middle frame 25 to form a fully enclosed second U-shaped groove.

[0082] In a specific implementation manner of this embodiment, a liquid sealant is placed in the inner gap formed between the second inner frame 24 and the second middle frame 25. When the first inner frame 14 is inserted into the inner gap, the sealant fills the formed second U-shaped groove. The second U-shaped groove is in an overpressure state (slightly higher than the outside atmospheric pressure) or a constant pressure state (not communicated with the outside atmosphere).

[0083] In the present utility model, the second U-shaped groove formed by assembly forms a sealing partition on the passage, further preventing outside rainwater from entering the telecommunication well; even after the sealing strip is worn due to the long-term opening and closing of the manhole cover 1, the solution of storing the sealant will also play a role in further preventing rainwater from entering the telecommunication well.

[0084] In a specific implementation manner of this embodiment, the sealant can be a liquid material that does not corrode the well seat 2 and the manhole cover 1.

[0085] In a specific implementation manner of this embodiment, the manhole cover 1 and the well seat 2 are made of resin material.

[0086] Please refer to the appendix Figure 2 and the appendix Figure 4 , in a specific implementation manner of this embodiment, the well seat 2 further includes: a vertical frame 27, one end of the vertical frame 27 is connected to the end of the well seat body 21 away from the second protrusion 22, and the other end of the vertical frame 27 extends in a direction away from the second protrusion 22.

[0087] When the telecommunication well manhole cover structure is installed on the telecommunication well opening, the vertical frame 27 is buried underground.

[0088] In the present utility model, by providing the vertical frame 27, a bent structure is formed between the vertical frame 27 and the well seat body 21, ensuring the reliability of the connection between the telecommunications well cover structure and the telecommunications well opening.

[0089] In a specific implementation manner of this embodiment, the well seat body 21 and the vertical frame 27 are connected to the vertical and side surfaces of the telecommunications well opening by bolts / screws.

[0090] Please refer to the attached Figure 1 and the attached Figure 2 , in a specific implementation manner of this embodiment, an avoidance groove 16 is provided on the side of the well cover body 11 away from the well seat 2, and a lifting ring 17 for opening or closing the well cover 1 by grasping is provided in the avoidance groove 16.

[0091] Please refer to the attached Figure 1 , in a specific implementation manner of this embodiment, a connecting member 18 is provided in the avoidance groove 16;

[0092] The lifting ring 17 is rotatably connected to the well cover 1 through the connecting member 18.

[0093] In the present utility model, by providing the lifting ring, it is more convenient to open and close the well cover 1.

[0094] In a specific implementation manner of this embodiment, the lifting ring 17, the avoidance groove 16 and the connecting member 18 are all structural members made of resin material.

[0095] Please refer to the attached Figure 1 , in a specific implementation manner of this embodiment, two relatively arranged avoidance grooves 16 are provided, and the lifting ring 17 and the connecting member 18 are correspondingly arranged in the avoidance grooves 16.

[0096] By applying a leak-proof telecommunications well cover structure provided by the present utility model, not only can the entry of external rainwater into the telecommunications well be effectively avoided, but also the convenience of opening and closing the well cover can be improved.

[0097] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present utility model, can make some changes or modifications by using the technical content prompted above into equivalent embodiments of equivalent changes. The implementation schemes in the above embodiments can also be further combined or replaced, but as long as the content does not depart from the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A leak-proof telecommunications well cover structure is installed on the opening of a telecommunications well. It is characterized in that, The structure of the telecommunications well cover includes: A well cover (1), which includes a well cover body (11) and a first convex portion (12) provided on the periphery of the well cover body (11). One end of the first convex portion (12) away from the well cover body (11) extends along a central axis parallel to the well cover body (11) in the vertical direction and towards the direction close to the opening of the telecommunications well. A well seat (2), which covers and is connected to the opening of the telecommunications well. In the vertical direction, the central axis of the well seat (2) coincides with that of the well cover (1). The well seat (2) includes a well seat body (21) and a second convex portion (22) provided on the periphery of the well seat body (21). One end of the second convex portion (22) away from the well seat body (21) extends along a central axis parallel to the well seat (2) in the vertical direction and towards the direction close to the well cover (1). In the projection along the direction of the central axis of the well seat (2) in the vertical direction, the second convex portion (22) partially coincides with the first convex portion (12). When the well cover (1) is installed on the well seat (2), both the first convex portion (12) and the second convex portion (22) at least partially extend into the other component.

2. The structure of a leak-proof telecommunications well cover according to claim 1, characterized in that, In a cross-section perpendicular to the extending direction of the first convex portion (12), the cross-section of the first convex portion (12) is in an inverted "U" shape. The first convex portion (12) includes: A top frame (13), one end of which is obliquely connected to the well cover body (11), and the other end of the top frame (13) extends towards the direction close to the well seat (2). A first inner frame (14), one end of which is connected to the end of the top frame (13) close to the well cover body (11), and the other end of the first inner frame (14) extends along a central axis parallel to the well cover body (11) in the vertical direction and towards the direction close to the second convex portion (22). A first outer frame (15), which is arranged parallel to the first inner frame (14). One end of the first outer frame (15) is connected to the other end of the top frame (13), and the extending end of the first outer frame (15) is flush with the extending end of the first inner frame (14) in the horizontal height.

3. The structure of a leak-proof telecommunications well cover according to claim 2, characterized in that, In a cross-section perpendicular to the extending direction of the second convex portion (22), the cross-section of the second convex portion (22) is in a "mountain" shape. The second convex portion (22) includes: A bottom frame (23), one end of which is connected to the well seat body (21), the bottom frame (23) is arranged parallel to the well seat body (21), and the end of the bottom frame (23) away from the well seat body (21) extends towards the direction close to the central axis of the well seat (2) in the vertical direction. A second inner frame (24), the second inner frame (24) is vertically connected to one end of the bottom frame (23) away from the well seat body (21), and the other end of the second inner frame (24) extends towards the direction close to the first convex part (12); A second middle frame (25), the second middle frame (25) is arranged in parallel with the second inner frame (24), the second middle frame (25) is arranged on the side of the bottom frame (23) where the second inner frame (24) is arranged, and the extension end of the second middle frame (25) is lower than the horizontal height where the extension end of the second inner frame (24) is located; A second outer frame (26), the second outer frame (26) is arranged on one end of the bottom frame (23) close to the well seat body (21), the second outer frame (26) is arranged in parallel with the second middle frame (25); the second outer frame (26), the second middle frame (25), and the second inner frame (24) are arranged in sequence; When the manhole cover (1) is installed on the well seat (2), the first outer frame (15) is inserted into the outer gap formed between the second outer frame (26) and the second middle frame (25), and the first inner frame (14) is inserted into the inner gap formed between the second inner frame (24) and the second middle frame (25).

4. The structure of a leak-proof telecommunications well cover according to claim 3, characterized in that, The extension end of the second middle frame (25) abuts against one side of the top frame (13) close to the well seat (2), and the extension end of the second inner frame (24) abuts against one side of the manhole cover body (11) close to the well seat (2); Sealing strips are arranged on the extension ends of the second middle frame (25) and the second inner frame (24).

5. The structure of a leak-proof telecommunications well cover according to claim 3, characterized in that, The first outer frame (15) is inserted into the outer gap formed between the second outer frame (26) and the second middle frame (25) to form a first U-shaped groove that is unilaterally communicated with the outside atmosphere.

6. A leak-proof telecommunications well cover structure according to any one of claims 3 to 5, characterized in that, The first inner frame (14) is inserted into the inner gap formed between the second inner frame (24) and the second middle frame (25) to form a fully enclosed second U-shaped groove.

7. The structure of a leak-proof telecommunications well cover according to claim 6, characterized in that, The well seat (2) further includes: a vertical frame (27), one end of the vertical frame (27) is connected to one end of the well seat body (21) away from the second convex part (22), and the other end of the vertical frame (27) extends towards the direction away from the second convex part (22).

8. The structure of a leak-proof telecommunications well cover according to claim 6, characterized in that, An avoidance groove (16) is arranged on one side of the manhole cover body (11) away from the well seat (2), and a lifting ring (17) for opening or closing the manhole cover (1) by grasping is arranged in the avoidance groove (16).

9. The structure of a leak-proof telecommunications well cover according to claim 8, characterized in that, A connecting member (18) is arranged in the avoidance groove (16); The lifting ring (17) is rotatably connected to the manhole cover (1) through the connecting member (18).

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