Well lid for well mouth, well lid assembly structure and hoisting equipment

Abstract

The utility model discloses a well lid for well mouth, well lid assembly structure and hoisting equipment, which comprises a body with an accommodating cavity, an air passage is fixedly arranged in the accommodating cavity, and the accommodating cavity is communicated with the bottom and / or the side wall of the body through the air passage; and a positioning structure for preventing the body from falling into a wellhead is fixedly arranged on the body. During assembly, the body extends into a well mouth, the positioning structure makes contact with the end face of the well mouth to prevent the well lid from falling off, and then the containing cavity of the well lid is filled with filler such as cement / asphalt. Therefore, on one hand, the quality of the well lid is greatly improved, and noise caused by well lid jumping is avoided; on the other hand, the structural strength and rigidity of the well lid are enhanced, and the well lid is not prone to deformation and cracking.

Description

Technical Field

[0001] The utility model relates to the technical field of manhole covers, in particular to a manhole cover for a wellhead, a manhole cover assembly structure and a hoisting device. Background Art

[0002] Manhole covers are used to cover the openings of roads or homes to prevent people or objects from falling. At present, most of the inspection wells on the main lanes of urban roads use flat ductile iron manhole covers. On the one hand, when vehicles pass through the manhole covers quickly, the manhole covers bounce and make a "clang" noise. On the other hand, the manhole covers are not rigid enough and are prone to deformation and cracking after long-term use. Utility Model Content

[0003] In view of the deficiencies in the prior art, the first purpose of the utility model is to provide a manhole cover for a wellhead, which optimizes the structure of the manhole cover, enhances the rigidity and strength of the manhole cover, and makes it less likely to deform and less likely to jump and generate noise.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A manhole cover for a wellhead comprises a body with a cavity, wherein an air passage is fixedly arranged in the cavity, and the air passage connects the cavity with the bottom and / or side wall of the body; and a positioning structure is fixedly arranged on the body to prevent it from falling into the wellhead.

[0006] Compared with the prior art, the bracket has the following beneficial effects:

[0007] During assembly, the main body is extended into the wellhead, and the positioning structure contacts the end face of the wellhead to prevent the manhole cover from falling. Then, cement / asphalt and other fillers are filled into the cavity of the manhole cover. In this way, on the one hand, the quality of the manhole cover is greatly increased, and the noise caused by the manhole cover jumping is avoided; on the other hand, the structural strength and rigidity of the manhole cover itself are enhanced, making it less likely to deform and crack. In addition, on the one hand, the airway plays a role in removing the gas in the wellhead during the process of the main body moving down along the wellhead, which facilitates the downward movement of the main body; on the other hand, the outer wall of the airway, as a skeleton, can increase the contact area with the filler, further strengthening the structural strength of the manhole cover.

[0008] As a preferred solution, the annular side wall of the body has a taper.

[0009] As a preferred solution, a lifting ear is fixedly provided in the cavity.

[0010] As a preferred solution, at least two of the air passages and the lifting ears are provided, and the air passages and the lifting ears are distributed in a ring around the center line of the body.

[0011] As a preferred solution, the top of the body is provided with a flange away from its center line to form the positioning structure.

[0012] The second object of the present utility model is to provide a manhole cover assembly structure for a wellhead, including any one of the above-mentioned manhole cover assembly structures for a wellhead, wherein the body extends into the wellhead, and the bottom end surface of the positioning structure abuts against the top end surface of the wellhead; and there is a filler in the cavity.

[0013] Preferably, the filler includes cement / asphalt.

[0014] The third object of the present utility model is to provide a hoisting device having any one of the above-mentioned manhole covers for a wellhead. Description of the Drawings

[0015] Figure 1 is a schematic structural view of the manhole cover;

[0016] Figure 2 is a schematic assembly structural view of the manhole cover and the wellhead;

[0017] Figure 3 is Figure 2 a sectional view of.

[0018] In the above-mentioned drawings:

[0019] 1, manhole cover; 2, body; 3, positioning structure; 4, cavity; 5, air duct; 6, lifting lug; 7, wellhead. Detailed Embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; the structures described in various embodiments can be freely combined without conflict in terms of structure or principle.

[0021] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. 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.

[0022] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] The following is a description of some embodiments of the present invention in conjunction with the accompanying drawings:

[0024] The utility model provides a manhole cover for a wellhead and an assembly structure of the manhole cover and the wellhead, such as Figure 1 As shown, the manhole cover 1 itself includes a body 2 with a cavity 4, and a positioning structure 3 is fixed on the body 2 to prevent it from falling into the wellhead 7; exemplarily, the middle part of the body 2 is recessed downward to form the cavity 4, the outer wall of the body 2 is cylindrical, and the top of the body 2 is provided with a flange away from its center line to form the positioning structure 3. In this way, the structure of the body 2 is simple and easy to form. An airway 5 is also fixed in the cavity 4, and the airway 5 connects the cavity 4 with the bottom and / or side wall of the body 2; exemplarily, the airway 5 includes a hollow tubular structure, and the bottom of the airway 5 passes through the bottom end of the body 2 and is connected to the wellhead 7.

[0025] like Figure 2 and Figure 3 As shown, during assembly, the main body 2 is extended into the wellhead 7, and the bottom end surface of the positioning structure 3 contacts the top end surface of the wellhead 7 to prevent the manhole cover 1 from falling, and then the cavity 4 of the manhole cover 1 is filled with fillers such as cement / asphalt. In this way, on the one hand, the quality of the manhole cover 1 is greatly increased, and the noise caused by the jumping of the manhole cover 1 is avoided; on the other hand, the structural strength and rigidity of the manhole cover 1 itself are enhanced, making it less likely to deform and crack. In addition, on the one hand, the air duct 5 plays a role in removing the gas in the wellhead 7 during the process of the main body 2 moving down along the wellhead 7, which facilitates the downward movement of the main body 2; on the other hand, the outer wall of the air duct 5 as a skeleton can increase the contact area with the filler, further strengthening the structural strength of the manhole cover 1.

[0026] As a preferred solution, the filler includes cement / asphalt; the material is easy to obtain and the cost is reduced.

[0027] As a preferred solution, the height of the airway 5 and the lifting lug 6 is designed to be flush with the height of the positioning structure 3. Since the manhole cover 1 itself is a sunken structure, after the manhole cover 1 is assembled, its top surface is smooth and flat and is well hidden on the ground.

[0028] As a preferred solution,Figure 3 As shown, in order to facilitate the assembly of the manhole cover 1 into the wellhead 7 or the removal from the wellhead 7, the annular side wall of the body 2 is designed to have a taper; specifically, the outer wall of the body 2 is designed as a frustum-shaped structure with a larger upper part and a smaller lower part.

[0029] As a preferred solution, as Figure 1 and Figure 2 shown, a lifting lug 6 is fixedly provided in the cavity 4. By hooking the hook of a lifting device (such as a crane or a lever bracket) onto the lifting lug 6, the lifting of the manhole cover 1 can be conveniently realized.

[0030] Furthermore, there are at least two air channels 5 and lifting lugs 6, and the air channels 5 and the lifting lugs 6 are annularly distributed around the center line of the body 2. In this way, the manhole cover 1 is stably lifted and prevented from falling off; in addition, the multiple air channels 5 and lifting lugs 6 play the role of a skeleton, enhancing the stiffness and strength of the wellhead 7.

[0031] Furthermore, the tops of the lifting lugs 6 and the air channels 5 are designed to be flush with the manhole cover 1, making the end face of the manhole cover 1 smooth.

[0032] The present utility model also proposes a lifting device having any one of the above manhole covers for a wellhead. Exemplarily, the lifting device includes a bracket and a lever. The lever is supported by the bracket on the ground, and the middle part of the lever is hinged to the bracket; one end of the lever is connected with a hook through a steel wire rope. When lifting, the hook hooks onto the lifting lug 6, and an external force drives the end of the lever away from the manhole cover 1 to swing downward, so that the lever can lift the manhole cover 1.

Claims

1. A manhole cover for a wellhead, characterized in that: The invention comprises a body (2) having a cavity (4), wherein an air passage (5) is fixedly arranged in the cavity (4), and the air passage (5) connects the cavity (4) with the bottom and / or side wall of the body (2); and a positioning structure (3) is fixedly arranged on the body (2) to prevent the body (2) from falling into a wellhead (7).

2. A manhole cover for a wellhead according to claim 1, characterized in that: The annular side wall of the body (2) has a taper.

3. A manhole cover for a wellhead according to claim 2, characterized in that: A lifting ear (6) is fixedly provided in the cavity (4).

4. A manhole cover for a wellhead according to claim 3, characterized in that: At least two of the air passages (5) and the lifting ears (6) are provided, and the air passages (5) and the lifting ears (6) are distributed in a ring shape around the center line of the body (2).

5. A manhole cover for a wellhead according to any one of claims 1 to 4, characterized in that: The top of the body (2) is provided with a flange away from the center line thereof to form the positioning structure (3).

6. A manhole cover assembly structure for a wellhead, characterized in that: It comprises a manhole cover for a wellhead as claimed in any one of claims 1 to 5, wherein the main body (2) extends into the wellhead (7), the bottom end surface of the positioning structure (3) abuts against the top end surface of the wellhead (7); and the cavity (4) has a filler.

7. A manhole cover assembly structure for a wellhead according to claim 6, characterized in that: Fill includes cement / asphalt.

8. A lifting device, characterized in that: Used for hoisting a manhole cover for a wellhead as described in any one of claims 1 to 5.

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