Self-tightening well lid

Abstract

The utility model relates to a self-tightening well lid which comprises a well lid body and a well lid base matched with the well lid body. The well lid base comprises a main ring wall and a movable ring wall located on the inner side of the main ring wall. The four movable ring walls are evenly distributed on the inner side of the main ring wall, each movable ring wall is in an arc sheet shape, and the movable ring walls and the main ring wall are of a concentric circle structure. A spring is arranged between the main ring wall and the movable ring wall; the self-tightening well lid has the advantages that the structure is simple, and the tightness between the well lid and the well lid seat can be automatically adjusted.

Description

Technical Field

[0001] The utility model relates to a self-tightening manhole cover. Background Art

[0002] The manhole cover is an important product in municipal engineering. It is the main connection port for connecting underground sewers. Manhole covers are divided into various types, such as: manhole covers for rainwater wells, cable wells, sewer wells, etc.; the current manhole covers are all equipped with a manhole cover seat. The manhole cover and the manhole cover seat are matched during production. Then the manhole cover seat is fixed on the ground first, and then the manhole cover is placed on the corresponding manhole cover seat. The manhole cover can be opened and moved, while the manhole cover seat is generally fixed; there are tolerances in the production process of any product, because the existing equipment cannot achieve zero tolerance, so even the matching manhole cover seats have tolerances. Although the manhole cover and the manhole cover seat should be over-matched, the use environment of the manhole cover is exposed to the sun and rain, and many manhole covers will be crushed. In this way, a larger gap will appear between the manhole cover and the manhole cover seat during use, and the manhole cover seat cannot provide a ring-fixing effect for the manhole cover, causing the manhole cover to flip up and down, which is not conducive to the flatness of the ground and the protective effect of the manhole cover. Utility Model Content

[0003] The utility model mainly solves the technical problems existing in the prior art, thereby providing a self-tightening manhole cover which has a simple structure and can automatically adjust the tightness between the manhole cover and the manhole cover seat.

[0004] The above technical problems of the utility model are mainly solved by the following technical solutions:

[0005] The utility model discloses a self-tightening manhole cover, comprising a manhole cover and a matching manhole cover seat; the manhole cover seat comprises a main circle wall and a movable circle wall located on the inner side of the main circle wall; the movable circle walls have a total of 4 pieces, which are evenly distributed on the inner side of the main circle wall, and the movable circle walls are in the shape of arc sheets and are concentric circle structures with the main circle wall; a spring is arranged between the main circle wall and the movable circle wall.

[0006] Preferably, spring columns are evenly arranged on the inner side wall of the main circle wall for sleeve-mounting the spring, so that one end of the spring can be fixed and the other end of the spring is connected to the movable circle wall.

[0007] Preferably, the bottom end of the main circle wall has a circle base extending outward.

[0008] Preferably, a plurality of uniformly arranged reinforcing ribs are provided between the ring base and the main ring wall.

[0009] Preferably, a supporting bottom ring extending inwardly is also provided at the bottom end of the main circle wall for supporting the manhole cover.

[0010] Preferably, a plurality of guide holes are evenly arranged on the support bottom ring.

[0011] Preferably, a plurality of guide posts corresponding to the guide holes are provided at the bottom of the movable ring wall.

[0012] The beneficial effects of the utility model are:

[0013] Four arc-shaped movable ring walls that are concentric with the main ring wall are arranged inside the main ring wall. In this way, when a gap appears between the manhole cover and the manhole cover seat, the movable ring wall can automatically move inward and press against the manhole cover under the action of the spring, ensuring the transition fit between the manhole cover and the manhole cover seat. The overall structure is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be 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 paying creative work.

[0015] Figure 1 , 2 4 is a schematic diagram of the structure of the utility model;

[0016] Figure 3 , 5 It is a partially enlarged schematic diagram of the utility model.

[0017] In the figure: 1-manhole cover seat, 2-manhole cover, 1.1-circle base, 1.2-reinforcement ribs, 1.3-main circle wall, 1.4-movable circle wall, 1.5-support bottom circle, 1.6-spring column, 1.7-spring, 1.8-guide hole, 1.9-guide column DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] like Figure 1-5As shown, a self-tightening manhole cover includes a manhole cover 2 and a matching manhole cover seat 1. When the manhole covers are produced, they are all matched with the manhole cover seats. Some manhole covers and the manhole cover seats have a place to connect the rotating shaft, so that the manhole covers have a specified opening direction. There are also places where there is no direct connection between the manhole covers and the manhole cover seats, but the manhole cover and the manhole cover seat need to be matched. When installing the manhole cover, the manhole cover seat and the road surface need to be fixed and installed by cement, and then the manhole cover can be placed on the corresponding manhole cover seat; the existing manhole covers and manhole cover seats are fixed structures; the manhole cover seat 1 includes a main circle wall 1.3 and a movable circle wall 1.4 located on the inner side of the main circle wall 1.3; the movable circle wall 1.4 has a total of 4 pieces, evenly distributed on the inner side of the main circle wall 1.3, and the movable circle wall 1.4 is in the shape of an arc sheet, and is a concentric circle structure with the main circle wall 1.3; a spring 1.7 is arranged between the main circle wall 1.3 and the movable circle wall 1.4.

[0020] The inner side wall of the main circle wall 1.3 is evenly provided with spring columns 1.6 for sleeve-mounting the spring 1.7, so that one end of the spring 1.7 can be fixed, and the other end of the spring 1.7 is connected to the movable circle wall 1.4.

[0021] The bottom end of the main circle wall 1.3 is provided with a circle base 1.1 extending outwards, which is used for supporting the manhole cover seat 1 when it is fixed on the road surface.

[0022] A plurality of uniformly arranged reinforcing ribs 1.2 are arranged between the ring base 1.1 and the main ring wall 1.3 to provide the main ring wall 1.3 with a supporting force and increase the strength of the main ring wall 1.3.

[0023] The bottom end of the main circle wall 1.3 is also provided with a supporting bottom circle 1.5 extending inwardly for supporting the manhole cover 2. In simple terms, the manhole cover 2 is placed in the main circle wall 1.3 and is supported by the supporting bottom circle 1.5.

[0024] The support bottom ring 1.5 is evenly provided with a plurality of guide holes 1.8.

[0025] The bottom of the movable ring wall 1.4 is provided with a plurality of guide posts 1.9 corresponding to the guide holes 1.8; specifically, one end of the guide post 1.9 is fixed to the bottom of the movable ring wall 1.4. The other end passes through the guide hole 1.8, so that the guide post 1.9 can only move within the guide hole 1.8, that is, to give the movable ring wall 1.4 a movable direction; since the manhole cover seat 1 and the manhole cover 2 are matched during production, the diameter of the manhole cover 2 and the diameter of the manhole cover seat 1 should be over-matched, but there are tolerances in production, and the manhole cover 2 will be worn out by the sun and rain during use. Once the manhole cover 2 and the manhole cover seat 1 become clearance-matched, the manhole cover 2 is easy to deviate and become a shaking manhole cover. , and the design of the spring 1.7 between the movable ring wall 1.4 and the main ring wall 1.3 can automatically adjust the movement. If the manhole cover 2 is worn (the material of the manhole cover is wear-resistant, so even if the wear is very small), after the clearance fit between the manhole cover seat 1 and the manhole cover seat 1 is formed, the movable ring wall 1.4 will automatically press inward, so that the manhole cover 2 can be tightened. If the manhole cover 2 is in transition fit with the manhole cover seat 1, the weight of the manhole cover 2 can completely make the movable ring wall 1.4 pressed against the inner side of the main ring wall 1.3;

[0026] In addition, the movable ring wall 1.4 can only move within the guide hole 1.8, and the guide hole 1.8 is located on the support bottom ring 1.5, so even if the movable ring wall 1.4 is not tightly attached to the inner side of the main ring wall 1.3, there is also a support bottom ring 1.5 at the bottom of the gap between them, which can prevent debris from entering the sewer through the gap between the movable ring wall 1.4 and the main ring wall 1.3; and the movable ring wall 1.4 is not only restricted and fixed by the guide column 1.9 and the guide hole 1.8, but also supported and fastened by the manhole cover 2 on the inside, so the movable ring wall 1.4 will not move at will.

[0027] The beneficial effects of the utility model are:

[0028] Four arc-shaped movable ring walls that are concentric with the main ring wall are arranged inside the main ring wall. In this way, when a gap appears between the manhole cover and the manhole cover seat, the movable ring wall can automatically move inward and press against the manhole cover under the action of the spring, ensuring the transition fit between the manhole cover and the manhole cover seat. The overall structure is simple.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A self-tightening manhole cover, characterized in that: The invention comprises a manhole cover (2) and a matching manhole cover seat (1); the manhole cover seat (1) comprises a main circle wall (1.3) and a movable circle wall (1.4) located inside the main circle wall (1.3); the movable circle walls (1.4) are four in total and are evenly distributed inside the main circle wall (1.3); the movable circle walls (1.4) are in the shape of circular arc sheets and are concentric with the main circle wall (1.3); a spring (1.7) is provided between the main circle wall (1.3) and the movable circle wall (1.4).

2. A self-tightening manhole cover according to claim 1, characterized in that: Spring columns (1.6) are evenly arranged on the inner side wall of the main circle wall (1.3) for sleeve-mounting the spring (1.7), so that one end of the spring (1.7) can be fixed, and the other end of the spring (1.7) is connected to the movable circle wall (1.4).

3. A self-tightening manhole cover according to claim 2, characterized in that: The bottom end of the main circle wall (1.3) is provided with a circle base (1.1) extending outwards.

4. A self-tightening manhole cover according to claim 3, characterized in that: More than two uniformly arranged reinforcing ribs (1.2) are arranged between the ring base (1.1) and the main ring wall (1.3).

5. The self-tightening manhole cover according to claim 2, characterized in that: The bottom end of the main circle wall (1.3) is also provided with a supporting bottom circle (1.5) extending inwards for supporting the manhole cover (2).

6. A self-tightening manhole cover according to claim 5, characterized in that: The support bottom ring (1.5) is evenly provided with a plurality of guide holes (1.8).

7. The self-tightening manhole cover according to claim 2, characterized in that: A plurality of guide posts (1.9) corresponding to the guide holes (1.8) are arranged at the bottom of the movable ring wall (1.4).

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