Novel nodular cast iron jacking pipe

Abstract

The utility model discloses a novel nodular cast iron jacking pipe, which belongs to the technical field of nodular cast iron pipes and comprises a jacking pipe body with a spigot and a socket respectively arranged at two ends, and a concrete layer is arranged on the outer wall of the jacking pipe body between the spigot and the socket. The jack end of the jacking pipe body is sleeved with a pushing flange and an operation cavity which is located on one side of the pushing flange, arranged in the circumferential direction of the jacking pipe body and communicated with the external environment, and when the two jacking pipes are in socket connection, the pushing flange of one jacking pipe is connected with the socket end of the other jacking pipe through a plurality of bolts in the operation cavity of the other jacking pipe. According to the utility model, the integrity and the safety of a pipeline system can be improved, sedimentation can be effectively prevented, and a pipe fitting interface is prevented from falling off.

Description

Technical Field

[0001] The utility model belongs to the technical field of ductile iron pipes, and in particular relates to a novel ductile iron top pipe. Background Art

[0002] Usually, the construction method of ductile iron pipes generally requires excavation of the road surface or construction site, and then laying and landfilling the pipes. However, excavation of the site will damage existing infrastructure, such as roads, sidewalks and green belts, and requires a lot of manpower and material resources, which not only increases additional economic costs but also affects the safety of surrounding buildings and underground pipelines. In order to solve the above problems, pipe jacking construction technology came into being.

[0003] Pipe jacking construction is a technology that can use a jacking device to push ductile iron pipes underground section by section without digging ditches. Since two adjacent ductile iron pipes are connected by sockets and spigots at both ends of their pipe bodies, that is, the spigot of one pipe is inserted into the socket of the adjacent pipe to connect the end to the end, during the construction or use of ductile iron pipes, it is easy to cause pipe settlement due to factors such as soil conditions, hydrogeological conditions, construction technology, and pipe quality. Settlement may affect the integrity of the pipeline system, flow efficiency, and safety of underground infrastructure, and may even cause the pipeline interface to fall off, resulting in a large amount of leakage of the medium in the pipeline, causing serious damage to surrounding buildings and facilities. Therefore, a new type of ductile iron pipe jacking that can improve the integrity of the pipeline system, effectively prevent settlement, and prevent the pipe interface from falling off is now needed. Utility Model Content

[0004] The utility model aims to provide a novel ductile iron jacking pipe, which can improve the integrity of the pipeline system, effectively prevent pipeline settlement, prevent the jacking pipe interfaces connected to each other by sockets from falling off, and improve the safety of the entire pipeline system.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A novel ductile iron jacking pipe comprises a jacking pipe body with a spigot and a socket respectively provided at both ends, a concrete layer is provided on the outer wall of the jacking pipe body between the spigot and the socket, a jacking flange is provided on the spigot end of the jacking pipe body, and an operating cavity is provided on one side of the jacking flange and is arranged along the circumference of the jacking pipe body and communicated with the external environment, when two jacking pipes are connected by spigot and socket, the jacking flange of one of the jacking pipes is connected to the socket end of the other jacking pipe by a plurality of bolts in the operating cavity of the jacking pipe.

[0007] A further improvement of the technical solution of the utility model is that the operating cavity is an annular cavity arranged along the circumference of the top pipe body, a plurality of bolts are evenly spaced and arranged in the annular cavity, and the outer edge of the annular cavity is an open operating inlet.

[0008] A further improvement of the technical solution of the utility model is that the operating cavity comprises a plurality of square cavities evenly spaced along the circumference of the top pipe body, a plurality of bolts are respectively placed in the corresponding square cavities, and the outer side of the square cavity is an open operating entrance.

[0009] A further improvement of the technical solution of the utility model is that threaded holes adapted to a plurality of bolts are respectively provided on the end faces of the socket end of the jacking flange and the jacking pipe body, and the bolts are locking bolts.

[0010] A further improvement of the technical solution of the utility model is that a concrete layer is filled between the socket end of the jacking pipe body and the jacking flange and a steel mesh is arranged inside the concrete layer.

[0011] A further improvement of the technical solution of the utility model is that a groove is arranged along the circumference of the inner wall of the socket end of the jacking pipe body, and when two jacking pipes are connected by socket, a T-shaped socket rubber ring is arranged in the groove.

[0012] Due to the adoption of the above technical solution, the technical progress achieved by the utility model is: it can improve the integrity of the pipeline system, effectively prevent pipeline settlement, prevent the top pipe interfaces connected to each other by sockets from falling off, and improve the safety of the entire pipeline system.

[0013] The utility model adopts bolts to connect the socket ends of two socket-connected jacking pipes with the jacking flange, so that the pipeline interface is more firm, the integrity of the entire pipeline system is improved, and the settlement of the jacking pipe can be effectively prevented.

[0014] The operating cavity communicated with the external environment adopted by the utility model can provide installation space for the bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a ductile iron jacking pipe according to Embodiment 1 of the present utility model;

[0016] Figure 2 Schematic diagram of cross section A of a ductile iron top pipe according to Embodiment 1 of the present utility model;

[0017] Among them, 1. concrete layer, 2. steel mesh, 3. jacking pipe body, 4. T-shaped socket rubber ring, 5. bolts, 6. jacking flange, 7. square cavity. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the embodiments:

[0019] Example 1

[0020] like Figure 1 and Figure 2As shown, this embodiment provides a new type of ductile iron jacking pipe, including a jacking pipe body 3 with a socket and a bell respectively provided at both ends, and a concrete layer 1 is provided on the outer wall of the jacking pipe body 3 between the socket and the bell, and the "between" referred to here refers to the position layout between the concrete layer 1 and the socket and the bell, rather than being in close contact with the bell and the socket. The socket end of the jacking pipe body 3 is provided with a jacking flange 6 and an operating cavity, and the jacking flange is sleeved on the jacking pipe body 3 by welding and fixing, and the operating cavity is located on one side of the jacking flange 6 and is arranged along the circumference of the jacking pipe body 3. When two jacking pipes are connected by socket, the jacking flange 6 of one of the jacking pipes can be connected to the bell end of the other jacking pipe by a plurality of bolts 5 in the operating cavity of one of the jacking pipes, thereby improving the integrity between the two jacking pipes and the firmness of the pipeline interface, and the operating cavity is connected to the external environment, providing an operating space for installing the bolts 5. The concrete layer 1 is filled between the socket end of the jacking pipe body 3 and the jacking flange 6 located at the socket end, and a steel mesh 2 is arranged inside it. An operating cavity is set between the jacking flange 6 and the concrete layer 1.

[0021] The push flange 6 and the socket end face of the jacking pipe body 3 are respectively provided with threaded holes adapted to a plurality of bolts 5. The threaded holes on the push flange 6 are through holes, and the threaded holes on the socket end face are blind holes. The bolts 5 can be locking bolts. The socket end of the jacking pipe body 3 is provided with a groove along the circumference of its inner wall. When the two jacking pipes are connected by socket, a T-shaped socket rubber ring 4 is provided in the groove to facilitate the sealing between the pipe interfaces.

[0022] The operation cavity is composed of a plurality of square cavities 7, which are evenly spaced along the circumference of the jacking pipe body 3, and a plurality of bolts 5 are respectively placed in the corresponding square cavities 7, and the outside of the square cavity 7 is an open operation entrance, where the "outside" refers to the direction perpendicular to the outer wall of the jacking pipe body 3. When two jacking pipes are connected by socket, the tools held by the operator can enter the square cavity 7 through the open operation entrance outside the square cavity 7 and install the bolts 5. The bolts 5 are threadedly connected with the jacking flange 6 and the threaded holes opened on the end face of the socket end of the jacking pipe body 3 in the square cavity 7, thereby improving the firmness of the adjacent jacking pipe interface and effectively preventing the jacking pipe from settling.

[0023] Example 2

[0024] The novel ductile iron jacking pipe provided in this embodiment has the same structure of components and connection relationships between components except for the operation chamber, except that:

[0025] The operation cavity is an annular cavity arranged along the circumference of the jacking pipe body 3, and a plurality of bolts 5 are evenly spaced in the annular cavity, and the outer edge of the annular cavity is an open operation entrance. When two jacking pipes are connected by socket, the tool held by the operator can enter the annular cavity through the open operation entrance on the outer edge of the annular cavity to install the bolts 5, and the bolts 5 are threadedly connected with the jacking flange 6 and the threaded holes opened on the end face of the socket end of the jacking pipe body 3 in the annular cavity.

[0026] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A novel ductile iron jacking pipe, comprising a jacking pipe body (3) with a spigot and a socket at both ends, characterized in that: The outer wall of the jacking pipe body (3) is provided with a concrete layer (1) between the spigot and the socket, the spigot end of the jacking pipe body (3) is sleeved with a jacking flange (6) and an operating cavity located on one side of the jacking flange (6) and arranged along the circumference of the jacking pipe body (3) and communicated with the external environment. When two jacking pipes are connected by spigot and socket, the jacking flange (6) of one jacking pipe is connected to the socket end of the other jacking pipe by a plurality of bolts (5) in the operating cavity.

2. A novel ductile iron jacking pipe according to claim 1, characterized in that: The operation cavity is an annular cavity arranged along the circumference of the top pipe body (3), a plurality of bolts (5) are evenly spaced and arranged in the annular cavity, and the outer edge of the annular cavity is an open operation inlet.

3. A novel ductile iron jacking pipe according to claim 1, characterized in that: The operation cavity comprises a plurality of square cavities (7) arranged at even intervals along the circumference of the top pipe body (3); a plurality of bolts (5) are respectively placed in corresponding square cavities (7); and the outer side of the square cavity (7) is an open operation entrance.

4. A novel ductile iron jacking pipe according to any one of claims 2 or 3, characterized in that: The push flange (6) and the socket end surface of the push pipe body (3) are respectively provided with threaded holes adapted to a plurality of bolts (5), and the bolts (5) are locking bolts.

5. The novel ductile iron jacking pipe according to claim 1 is characterized in that: The concrete layer (1) is filled between the socket end of the jacking pipe body (3) and the jacking flange (6), and a steel mesh (2) is arranged inside the concrete layer.

6. A novel ductile iron jacking pipe according to any one of claims 1 to 3, characterized in that: The socket end of the jack pipe body (3) is provided with a groove along the circumference of its inner wall. When two jack pipes are connected by socket connection, a T-shaped socket rubber ring (4) is provided in the groove.

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