Framework composite pipe with plastic-injected steel at end part

Abstract

The utility model discloses an end part injection molding steel framework composite pipe, which comprises a plastic pipe body, a reinforced steel framework, a flange and a flange framework, the reinforced steel framework is pre-embedded in the inner wall of the plastic pipe body, one end or two ends of the outer circle of the plastic pipe body are provided with end part injection molding pieces, and the flange framework is embedded in the reinforced steel framework. The flange framework is arranged in the end injection molding part and connected with the reinforced steel framework, the flange is arranged on the end injection molding part in a sleeving mode, a conical face is arranged at the end, away from the corresponding end of the plastic pipe body, of the end injection molding part, and a conical hole corresponding to the conical face is formed in the flange. By means of the mode, according to the end injection molding steel framework composite pipe, the flange framework connected with the reinforcing steel framework is used for reinforcing the end injection molding piece, and therefore the fixing effect and the tensile property of the flange are improved.

Description

Technical Field

[0001] The utility model relates to the field of composite pipes, in particular to an end-injection steel skeleton composite pipe. Background Art

[0002] Plastic composite pipes are usually connected by electric heat fusion or flange connection. Electric heat fusion is to insert the ends of two sections of plastic pipes into the electric heat fusion sleeve and then heat them with electricity to achieve electric heat fusion connection. The sealing is relatively good, but it is necessary to add electric heat fusion sleeves, which has certain requirements for the construction environment, and the tensile strength of electric heat fusion sleeves is poor. The operation of flange connection is relatively convenient. The flange can be installed at the end of the plastic composite pipe before leaving the factory, and the two sections of plastic composite pipe can be connected on site using flanges and screws.

[0003] Flanges are divided into plastic flanges and steel flanges. In order to improve the structural strength, steel flanges can be used. In fact, plastic flanges and steel flanges are usually fixed at the ends of plastic composite pipes by electric hot melting. The invention patent application with application number 2005101044756 discloses a mining pipe welded with electric heating wire. Electric heating wires are arranged on the inner wall of the flange support, and the fixing is achieved after electric heating. The tensile effect of this flange electric hot melting fixing method is similar to the tensile effect of the electric melting sleeve connection. It cannot be used for pipelines with high tensile performance requirements and needs to be improved. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide an end-injection steel skeleton composite pipe to improve the construction convenience and tensile performance.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide an end-injection-molded steel skeleton composite pipe, including: a plastic pipe body, a reinforced steel skeleton, a flange and a flange skeleton, the reinforced steel skeleton is pre-buried in the inner wall of the plastic pipe body, one or both ends of the outer circle of the plastic pipe body are provided with an end injection molded part, the flange skeleton is arranged in the end injection molded part and connected to the reinforced steel skeleton, the flange is sleeved on the end injection molded part, the end of the end injection molded part away from the corresponding end of the plastic pipe body is provided with a conical surface, and the flange is provided with a conical hole corresponding to the conical surface.

[0006] In a preferred embodiment of the present invention, a flange stopper is provided on the plastic pipe body, and the flange stopper is located on a side of the flange away from a corresponding end of the plastic pipe body.

[0007] In a preferred embodiment of the utility model, the flange stopper is made of an electric hot melt tape, which is wound around the outer circle of the plastic pipe body and fixed by electric hot melt welding after power is turned on.

[0008] In a preferred embodiment of the utility model, the electric hot melt tape is wrapped around the outer circumference of the plastic pipe body by 330° to 350°.

[0009] In a preferred embodiment of the utility model, the reinforced steel frame is a punched thin-walled steel plate argon arc straight seam welded frame or a plasma spiral welded mesh steel frame, and the flange is a steel flange.

[0010] In a preferred embodiment of the present invention, the plastic pipe body is a polyethylene pipe.

[0011] In a preferred embodiment of the present invention, the flange frame includes a conical cover, which is arranged on the reinforced steel frame and is concentric with the conical surface.

[0012] In a preferred embodiment of the utility model, the flange skeleton also includes a cylinder and an annular piece, the small hole end of the conical cover is welded and fixed to the reinforced steel skeleton, the large hole end of the conical cover points to the corresponding end of the reinforced steel skeleton, the cylinder is concentrically arranged at the large hole end of the conical cover, and the annular piece is concentrically arranged at the end or inner side of the cylinder.

[0013] In a preferred embodiment of the present invention, the conical cover, the cylinder and the ring piece adopt an integrated steel structure, and the inner hole of the ring piece is welded and fixed to the reinforced steel frame.

[0014] In a preferred embodiment of the utility model, through holes are arranged at intervals on the conical cover, the cylinder and the ring sheet.

[0015] The beneficial effects of the utility model are as follows: the utility model points out an end-injection steel skeleton composite pipe, which utilizes the tapered surface on the end injection molded part to cooperate with the tapered hole in the flange to position the flange, and utilizes the flange skeleton connected to the reinforced steel skeleton in the end injection molded part to reinforce the end injection molded part, thereby improving the fixing effect and tensile performance of the flange, avoiding the problem of separation of the flange and the plastic pipe body during use, and is suitable for splicing pipelines with high requirements for tensile performance, and is convenient for construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 This is a structural schematic diagram of a preferred embodiment of an end-injection steel skeleton composite pipe of the utility model;

[0018] Figure 2 yes Figure 1 Schematic diagram of the structure of the plastic pipe body, reinforced steel frame and flange frame. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 and Figure 2 , the utility model embodiment includes:

[0021] like Figure 1 The end injection steel skeleton composite pipe shown includes: a plastic pipe body 1, a reinforced steel skeleton 2, a flange 4 and a flange skeleton 7. The reinforced steel skeleton 2 is pre-buried in the inner wall of the plastic pipe body 1. In this embodiment, the plastic pipe body 1 adopts a polyethylene pipe, which is corrosion-resistant and impact-resistant, and has good electric hot-melt connection. The reinforced steel skeleton 2 adopts a punched thin-walled steel plate argon arc straight seam welding skeleton or a plasma spiral welded mesh steel skeleton, and has a porous structure, which can not only increase the bonding effect and structural strength with the plastic pipe body 1, but also reduce the dead weight.

[0022] An end injection molded part 8 is disposed at one or both ends of the outer circle of the plastic pipe body 1, and a flange frame 7 is disposed in the end injection molded part 8 and connected to the reinforced steel frame 2, such as Figure 1 As shown, the end injection molded part 8 adopts an annular structure. After the flange frame 7 and the reinforced steel frame 2 are welded and fixed, the end injection molded part 8 is injected to wrap the flange frame 7 and the reinforced steel frame 2.

[0023] The flange 4 is sleeved on the end injection molded part 8. The end of the end injection molded part 8 facing away from the corresponding end of the plastic pipe body 1 is provided with a tapered surface 6. The flange 4 is provided with a tapered hole 5 corresponding to the tapered surface 6, which fits tightly. The flange 4 is positioned by utilizing the cooperation between the tapered surface 6 and the tapered hole 5, and the uniformity of force is ensured.

[0024] In this embodiment, the flange 4 is made of steel and has high structural strength. When the flange 4 is pulled, the pulling force is transmitted to the flange frame 7, and then transmitted to the reinforced steel frame 2 through the flange frame 7, thereby reducing the force on the plastic pipe body 1 and greatly improving the tensile strength of the structure.

[0025] like Figure 2As shown, part of the plastic is removed from the outer end of the plastic pipe body 1, exposing a section of the reinforced steel frame 2 for welding and fixing the flange frame 7. The flange frame 7 includes a conical cover 71, which is sleeved on the reinforced steel frame 2 and is concentric with the conical surface 6 to improve the uniformity of force. The small hole end of the conical cover 71 is welded and fixed to the reinforced steel frame 2, and the structure is firm.

[0026] In order to further improve the structural strength of the flange frame 7, in this embodiment, the flange frame 7 also includes a cylinder 72 and a ring piece 73. The large hole end of the conical cover 71 points to the corresponding end of the reinforced steel frame 2. The cylinder 72 is concentrically arranged at the large hole end of the conical cover 71, and the ring piece 73 is concentrically arranged at the end or inner side of the cylinder 72. Figure 2 As shown, the inner hole of the ring piece 73 is welded and fixed to the reinforced steel frame 2 to support the cylinder 72, thereby improving the structural stability of the flange frame 7 on the reinforced steel frame 2.

[0027] In this embodiment, the conical cover 71, the cylinder 72 and the ring piece 73 adopt an integrated steel structure with high structural strength. Through holes are arranged at intervals on the conical cover 71, the cylinder 72 and the ring piece 73, which is conducive to reducing the dead weight. The through holes are conducive to the flow of molten plastic when the end injection molding 8 is injected, ensuring the compactness of the injection molding of the end injection molding 8.

[0028] In order to limit the flange 4, a flange limiter 3 is provided on the plastic pipe body 1. The flange limiter 3 is located on the side of the flange 4 away from the corresponding end of the plastic pipe body 1 to prevent the flange 4 from sliding away from the end of the plastic pipe body 1 and improve stability.

[0029] In this embodiment, the flange stopper 3 is made of electric hot melt tape, which is wrapped around the outer circumference of the plastic pipe body 1 and fixed by electric hot melt welding after power is turned on, which is convenient for construction. The electric hot melt tape is wrapped around the outer circumference of the plastic pipe body 1 at 330° to 350°, which is convenient for construction, and the gap is densely filled with molten polyethylene material, with beautiful structure and high stability.

[0030] In summary, the end-injection steel skeleton composite pipe pointed out in the utility model realizes the fixation of the flange on the plastic pipe body, improves the structural stability and tensile performance, and facilitates the on-site pipeline connection construction.

[0031] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An end-injection steel skeleton composite pipe, comprising: A plastic tube body and a reinforced steel frame, wherein the reinforced steel frame is embedded in the inner wall of the plastic tube body, and is characterized in that it also includes a flange and a flange frame, wherein one or both ends of the outer circle of the plastic tube body are provided with an end injection molded part, the flange frame is arranged in the end injection molded part and connected to the reinforced steel frame, the flange is sleeved on the end injection molded part, and a conical surface is arranged at the end of the end injection molded part away from the corresponding end of the plastic tube body, and a conical hole corresponding to the conical surface is arranged in the flange.

2. The end-injection steel skeleton composite pipe according to claim 1, characterized in that: The plastic pipe body is provided with a flange stopper, and the flange stopper is located at a side of the flange away from the corresponding end of the plastic pipe body.

3. The end-injection steel skeleton composite pipe according to claim 2, characterized in that: The flange stopper is made of an electric hot melt tape, which is wound around the outer circle of the plastic pipe body and fixed by electric hot melt welding after power is turned on.

4. The end-injection steel skeleton composite pipe according to claim 3 is characterized in that: The electric hot melt tape is wound around the outer circumference of the plastic pipe body at an angle of 330° to 350°.

5. The end-injection steel skeleton composite pipe according to claim 1, characterized in that: The reinforced steel frame is made of a punched thin-walled steel plate argon arc straight seam welded frame or a plasma spiral welded mesh steel frame, and the flange is made of steel.

6. The end-injection steel skeleton composite pipe according to claim 1, characterized in that: The plastic pipe body is a polyethylene pipe.

7. The end-injection steel skeleton composite pipe according to claim 1, characterized in that: The flange frame comprises a conical cover which is arranged on the reinforced steel frame and is concentric with the conical surface.

8. The end-injection steel skeleton composite pipe according to claim 7, characterized in that: The flange frame also includes a cylinder and an annular piece. The small hole end of the conical cover is welded and fixed to the reinforced steel frame, and the large hole end of the conical cover points to the corresponding end of the reinforced steel frame. The cylinder is concentrically arranged at the large hole end of the conical cover, and the annular piece is concentrically arranged at the end or inner side of the cylinder.

9. The end-injection steel skeleton composite pipe according to claim 8, characterized in that: The conical cover, the cylinder and the ring piece adopt an integrated steel structure, and the inner hole of the ring piece is welded and fixed to the reinforced steel frame.

10. The end-injection steel skeleton composite pipe according to claim 8, characterized in that: Through holes are arranged at intervals on the conical cover, the cylinder and the ring sheet.

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