Gear tooth-shaped socket steel pipe

Abstract

The utility model relates to a gear-tooth-shaped socket steel pipe which comprises a socket steel pipe body, an annular boss is arranged on the side wall of the tail end of the socket steel pipe body, a plurality of tooth-shaped grooves are formed in the annular boss in the annular direction, a tooth-shaped supporting table is arranged between every two tooth-shaped grooves, machining difficulty is small, and the ring stiffness of the socket steel pipe is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline processing, and particularly relates to a gear-shaped socket steel pipe. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Socket connection refers to a connection method that combines two steel pipes using socket-type fittings.

[0004] The inventors discovered the following technical problems:

[0005] (1) Conventional butt welding connection is difficult to process: At present, the most common connection method for large-diameter steel pipes in large-scale water conservancy projects is butt welding. However, the welding connection method is too difficult to construct and requires a high level of skill from the welder. In addition, welding of steel pipes will damage the anti-corrosion layer on the inner wall, which can easily cause rust and leakage at the joints, greatly reducing the service life of the pipeline. In addition, the construction efficiency is low and quality defects are very likely to occur during the welding process.

[0006] (2) Low annular stiffness of the socket pipe: Due to the settlement of the pipe's own gravity, the pipe socket will be deformed by the pressure of the covering soil, which will cause compression fatigue damage to the rubber ring inside the socket and affect the sealing performance of the socket rubber ring. Utility Model Content

[0007] The utility model provides a gear-toothed socket steel pipe, comprising a socket steel pipe, a socket steel pipe is arranged on the side wall of the end of the socket steel pipe, a plurality of tooth-shaped grooves are arranged in the circumferential direction on the annular boss, a tooth-shaped support platform is arranged between every two tooth-shaped grooves, and the socket steel pipe is connected to the iron pipe through the tooth-shaped support platform.

[0008] The toothed groove is opened toward the center of the annular boss.

[0009] The bottom of the toothed groove is provided with a first transition arc surface.

[0010] A second transition cambered surface is provided on the top of the toothed support platform.

[0011] The annular boss is hollow.

[0012] The annular boss is connected to the outer wall of the socket steel pipe through a rounded corner.

[0013] The annular boss is vertically arranged on the outer wall of the inserted steel pipe.

[0014] The cross section of the annular boss presents a triangular structure.

[0015] The annular boss and the socket steel pipe have the same wall thickness.

[0016] The cross section of the iron pipe is rectangular.

[0017] Beneficial effects of one or more of the above technical solutions:

[0018] (1) The present invention improves the original socket support platform, reducing the difficulty of socket processing; the support platform provided at the socket not only plays a supporting role but also has the function of a positioning platform, and can also serve as an identification line when the socket is inserted.

[0019] (2) When large-diameter socket-and-spigot steel pipes and iron pipes are connected using a socket-and-spigot connection, this structure can greatly increase the overall ring stiffness under the same wall thickness, preventing the socket from being deformed under the pressure of the overburden and affecting the sealing performance of the rubber ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation on this application.

[0021] Figure 1 This is a structural diagram of the gear-shaped socket steel pipe of Example 1.

[0022] Figure 2 This is a schematic diagram of the connection between the socket steel pipe and the iron pipe of the gear-shaped socket steel pipe in Example 1.

[0023] In the figure, 1 is a socket steel pipe; 2 is an annular boss; 3 is a toothed groove; 4 is a toothed support platform; 5 is a first transition arc surface; 6 is a second transition arc surface; 7 is a fillet; and 8 is an iron pipe. DETAILED DESCRIPTION

[0024] The specific implementation of this embodiment is described below with reference to the accompanying drawings.

[0025] Example 1:

[0026] Reference Figure 1 The embodiment of the present application provides a toothed socket steel pipe, including a socket steel pipe 1, a socket steel pipe 1 is provided on the side wall of the end of the socket steel pipe 1, and a plurality of tooth-shaped grooves 3 are provided on the annular boss 2 along the circumferential direction. In this embodiment, six tooth-shaped grooves 3 are selected, and a tooth-shaped support platform 4 is provided between every two tooth-shaped grooves 3. The six tooth-shaped grooves 3 and the six tooth-shaped support platforms 4 together constitute a tooth-shaped support platform 4 in the shape of a hexagonal gear tooth. The socket steel pipe 1 is connected to the iron pipe 8 through the tooth-shaped support platform, wherein the iron pipe 8 is an existing ductile iron pipe 8.

[0027] By analyzing the relationship between the diameter and wall thickness of the ductile iron pipe 8 and the socket steel pipe 1 and the ring stiffness calculation, it is found that for the same type of ductile iron pipe 8 and socket steel pipe 1 in large-diameter pipes, the wall thickness of the ductile iron pipe 8 is about 1.4-1.6 times the wall thickness of the steel pipe; by analyzing and understanding the ring stiffness of pipes of various structures, the use of hexagonal gear tooth shape can greatly improve the ring stiffness of the steel pipe.

[0028] Reference Figure 1 The toothed grooves 3 are opened toward the center of the annular boss 2. The evenly arranged toothed grooves 3 are corresponding to the toothed support platforms 4. The toothed support platforms 4 protruding outward provide annular rigidity, while the toothed grooves 3 recessed inward can make the force more uniform and avoid stress concentration.

[0029] Reference Figure 1 A first transition arc surface 5 is provided at the bottom of the tooth-shaped groove 3, and a second transition arc surface 6 is provided at the top of the tooth-shaped support platform. When the height change occurs in the structure of the annular boss 2, the first transition arc surface 5 provided at the bottom of the tooth-shaped groove 3 and the second transition arc surface 6 provided at the top of the tooth-shaped support platform can avoid the occurrence of stress concentration.

[0030] Reference Figure 2 The annular boss 2 is hollow, and the annular boss 2 is set as an outward convex structure to provide a certain rigidity for the socket of the socket steel pipe 1. At the same time, the internal hollow setting saves materials and reduces the overall weight of the socket steel pipe 1.

[0031] Reference Figure 2 The annular boss 2 is connected to the outer wall of the socket steel pipe 1 through the fillet 7. The setting of the fillet 7 reduces the stress concentration at the connection between the annular boss 2 and the socket steel pipe 1.

[0032] Reference Figure 2 The annular boss 2 is vertically arranged on the outer wall of the inserted steel pipe. The vertical arrangement of the annular boss 2 can provide the maximum supporting force to the toothed support platform 4 to ensure the annular convexity.

[0033] Reference Figure 2 The cross section of the annular boss 2 presents a triangular structure, wherein the triangular structure can provide a higher supporting force.

[0034] Reference Figure 2 The wall thickness of the annular boss 2 and the socket steel pipe 1 is the same. The same wall thickness reduces the difficulty of processing. At the same time, the connection between the annular boss 2 and the socket steel pipe 1 can have a smooth transition to ensure uniform force.

[0035] Reference Figure 2 The cross section of the iron pipe 8 is rectangular, and the rectangular setting of the iron pipe 8 provides a connection space with the socket steel pipe 1.

[0036] Although the above describes the specific implementation methods of the present invention in conjunction with the accompanying drawings, it does not limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or variations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present invention.

Claims

1. A toothed socket steel pipe, characterized in that: It comprises a socket steel pipe, the side wall of the end of the socket steel pipe is provided with an annular boss, a plurality of tooth-shaped grooves are provided in the annular direction on the annular boss, a tooth-shaped support platform is provided between every two tooth-shaped grooves, and the socket steel pipe is connected to the iron pipe through the tooth-shaped support platform.

2. The toothed socket steel pipe according to claim 1, characterized in that: The toothed groove is opened toward the center of the annular boss.

3. The toothed socket steel pipe according to claim 1, characterized in that: The bottom of the toothed groove is provided with a first transition cambered surface.

4. The toothed socket steel pipe according to claim 1, characterized in that: The top end of the toothed support platform is provided with a second transition arc surface.

5. The toothed socket steel pipe according to claim 1, characterized in that: The annular boss is hollow.

6. The toothed socket steel pipe according to claim 1, characterized in that: The annular boss is connected to the outer wall of the socket steel pipe through a fillet.

7. The toothed socket steel pipe according to claim 1, characterized in that: The annular boss is vertically arranged on the outer wall of the inserted steel pipe.

8. The toothed socket steel pipe according to claim 1, characterized in that: The cross section of the annular boss presents a triangular structure.

9. The toothed socket steel pipe according to claim 1, characterized in that: The annular boss and the socket steel pipe have the same wall thickness.

10. The toothed socket steel pipe according to claim 1, characterized in that: The cross section of the iron pipe is rectangular.

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