Self-locking well lid

Abstract

The circle center of a well ring, the circle center of a well cover plate and the circle center of a bottom well ring are overlapped, a well hole is formed in the well ring, a plurality of claw holes are evenly distributed in the periphery of the well hole, the claw holes are communicated with the well hole, the well cover plate is embedded in the well hole, a plurality of claws are evenly distributed in the periphery of the well cover plate, the shapes of the claws are matched with those of the claw holes, and through holes are symmetrically formed in the well cover plate. A bottom walling crib is fixedly arranged on the bottom face of the walling crib, the inner diameter of the bottom walling crib is smaller than the diameter of the well hole, and the outer diameter of the bottom walling crib is larger than the diameter of the well hole. The manhole cover plate and the manhole ring are matched, the bottom manhole ring is connected to the lower portion of the manhole ring through the welding technology and serves as a support of the manhole cover plate, the manhole cover plate and the manhole ring form self-locking through the four square claws with the inclination angle being 30 degrees, and when large and heavy vehicles pass through the manhole cover, vertical jumping of the manhole cover plate can be effectively limited, and the manhole cover is prevented from being pressed and damaged; and the actual safety environment requirement for carrying large and heavy vehicles such as steel billets and ore raw materials in a metallurgical industry plant area is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of production technology in the water supply industry, and particularly relates to a self-locking manhole cover. Background Art

[0002] Manhole covers are used to cover roads, wells, and other spaces to prevent people or objects from falling. They are divided into various types depending on the application environment, such as metal manhole covers, high-strength fiber cement concrete manhole covers, and resin manhole covers. In actual applications, appropriate manhole covers are selected according to different road conditions. However, on roads where large and heavy vehicles frequently pass, the manhole covers have a low degree of compatibility, and specially customized manhole covers are expensive. Traditional manhole covers often have broken hinges and shifted covers. Replacing damaged manhole covers requires a lot of time and effort, and repairs are difficult and inefficient. Utility Model Content

[0003] The purpose of the utility model is to provide a self-locking manhole cover to solve the problems of high cost of custom-made manhole covers, cumbersome replacement and difficult repair of traditional manhole covers.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A self-locking manhole cover comprises a manhole ring, a manhole cover plate and a bottom manhole ring, wherein the centers of the manhole ring, the manhole cover plate and the bottom manhole ring overlap, a well hole is arranged inside the manhole ring, a plurality of claw holes are evenly distributed around the outer circumference of the well hole, the claw holes are connected to the well hole, the manhole cover plate is embedded in the well hole, a plurality of claws are evenly distributed around the outer circumference of the manhole cover plate, the shape of the claws matches the claw holes, through holes are symmetrically arranged on the manhole cover plate, the bottom manhole ring is fixedly arranged on the bottom surface of the manhole ring, the inner diameter of the bottom manhole ring is smaller than the diameter of the well hole, and the outer diameter of the bottom manhole ring is larger than the diameter of the well hole.

[0006] In order to further realize the present invention, there are four claw holes and claws, which are distributed in a cross shape. The claw holes are inclined grooves, and the angle between the side walls of the inclined grooves and the bottom surface of the well ring is 30°.

[0007] In order to further realize the present invention, the claw is square, the end face of the claw is a parallelogram, and the shape of the claw hole matches the shape of the claw.

[0008] In order to further realize the present invention, the angle between the side surface and the bottom surface of the claw is 30°.

[0009] In order to further realize the present utility model, the diameter of the manhole cover is 700 mm and the thickness is 20 mm.

[0010] In order to further realize the present invention, the diameter of the through hole is 50 mm.

[0011] In order to further realize the present invention, the well ring is a square with a side length of 1200 mm and a thickness of 20 mm, and the diameter of the well hole is 700 mm.

[0012] In order to further realize the present invention, the bottom well ring is in the shape of a circular ring, and the outer diameter of the bottom well ring is 800 mm and the inner diameter is 650 mm.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model matches the manhole cover plate and the manhole ring. The bottom manhole ring is connected to the bottom of the manhole ring through a welding process. As a support for the manhole cover plate, the manhole cover plate is self-locked with the manhole ring through four square claws with an inclined angle of 30°. When large and heavy vehicles pass through, the up and down jumping of the manhole cover plate can be effectively limited and the manhole cover can be prevented from being crushed and damaged, meeting the actual safety environment requirements of large and heavy vehicles carrying steel billets, ore raw materials, etc. in the metallurgical industry plant area.

[0015] The utility model is simple to manufacture, easy to replace, low in cost and high in cost performance. It is suitable for roads where large vehicles and heavy-loaded vehicles frequently pass through. It can be used as a valve manhole cover for water supply and drainage network, a metering manhole cover, etc. in specific environments such as in metallurgical industry factories where large and heavy vehicles carrying steel billets, ore raw materials, etc. pass through. It prevents the manhole cover from being damaged by pressure, and solves the problems of high cost of customized manhole covers, cumbersome replacement and difficult repair of traditional manhole covers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 for Figure 1 AA section view in;

[0018] Figure 3 This is a structural diagram of the well cover in the utility model;

[0019] Figure 4 for Figure 3 BB cross-sectional view in;

[0020] Figure 5 This is a schematic diagram of the structure of the well ring in the utility model;

[0021] Figure 6 for Figure 5 CC section view in;

[0022] Figure 7 This is a schematic structural diagram of the bottom well ring in the utility model;

[0023] Figure 8 for Figure 7 Middle DD section view;

[0024] The meanings of the accompanying figures are as follows: 1. well ring; 2. well cover; 3. bottom well ring; 4. well hole; 5. claw hole; 6. claw; 7. through hole. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1-8 As shown, a self-locking manhole cover is characterized in that it includes a manhole ring 1, a manhole cover plate 2 and a bottom manhole ring 3. The centers of the manhole ring 1, the manhole cover plate 2 and the bottom manhole ring 3 overlap. The manhole ring 1 is a square with a side length of 1200 mm and a thickness of 20 mm. A well hole 4 is arranged inside the manhole ring 1 with a diameter of 700 mm. Four claw holes 5 are arranged in a cross shape on the outer periphery of the well hole 4. The claw holes 5 are connected to the well hole 4. The manhole cover plate 2 is embedded in the well hole 4. The diameter of the manhole cover plate 2 is 700 mm and the thickness is 20 mm. The outer periphery of the manhole cover plate 2 is 100 mm. Four claws 6 are arranged in a cross shape around the periphery to cooperate with the claw hole 5. The claws 6 are square, and the end faces of the claws 6 are parallelograms. The shape of the claws 6 cooperates with the claw holes 5. The angle between the side and bottom surfaces of the claws 6 is 30°. The through holes 7 are symmetrically arranged on the manhole cover 2. The diameter of the through holes 7 is 50 mm. The bottom surface of the well ring 1 is fixedly provided with a bottom well ring 3. The bottom well ring 3 is a circular ring. The outer diameter of the bottom well ring 3 is 800 mm and the inner diameter is 650 mm. The inner diameter of the bottom well ring 3 is smaller than the diameter of the well hole 4, and the outer diameter of the bottom well ring 3 is larger than the diameter of the well hole 4.

Claims

1. A self-locking manhole cover, characterized by: The invention comprises a well ring (1), a well cover plate (2) and a bottom well ring (3), wherein the centers of the well ring (1), the well cover plate (2) and the bottom well ring (3) overlap, a well hole (4) is arranged inside the well ring (1), a plurality of claw holes (5) are evenly distributed on the outer circumference of the well hole (4), the claw holes (5) are connected with the well hole (4), the well cover plate (2) is embedded in the well hole (4), a plurality of claws (6) are evenly distributed on the outer circumference of the well cover plate (2), the shape of the claws (6) matches the claw holes (5), through holes (7) are symmetrically arranged on the well cover plate (2), the bottom well ring (3) is fixedly arranged on the bottom surface of the well ring (1), the inner diameter of the bottom well ring (3) is smaller than the diameter of the well hole (4), and the outer diameter of the bottom well ring (3) is larger than the diameter of the well hole (4).

2. The self-locking manhole cover according to claim 1, characterized in that: There are four claw holes (5) and four claws (6) distributed in a cross shape. The claw holes (5) are inclined grooves, and the angle between the side wall of the inclined groove and the bottom surface of the well ring (1) is 30 degrees.

3. The self-locking manhole cover according to claim 1 or 2, characterized in that: The claw (6) is square, the end face of the claw (6) is a parallelogram, and the shape of the claw hole (5) matches the shape of the claw (6).

4. The self-locking manhole cover according to claim 3, characterized in that: The angle between the side surface and the bottom surface of the claw (6) is 30°.

5. The self-locking manhole cover according to claim 4, characterized in that: The manhole cover plate (2) has a diameter of 700 mm and a thickness of 20 mm.

6. The self-locking manhole cover according to claim 5, characterized in that: The diameter of the through hole (7) is 50 mm.

7. The self-locking manhole cover according to claim 6, characterized in that: The well ring (1) is a square, with a side length of 1200 mm and a thickness of 20 mm. The diameter of the well hole (4) is 700 mm.

8. The self-locking manhole cover according to claim 7, characterized in that: The bottom well ring (3) is in the shape of a ring, and the outer diameter of the bottom well ring (3) is 800 mm and the inner diameter is 650 mm.

Images