A production device for high-strength plastic-steel composite pipe

Abstract

The present invention discloses a high-strength plastic-steel composite pipe and a production device thereof, comprising a composite pipe body, the composite pipe body is composed of an inner pipe located inside and a wall pipe covered outside the composite pipe, the outer circle of the wall pipe is provided with a plurality of ridges, the inner part of the ridges is provided with steel strips, the outer part of the ridges is provided with an outer pipe, the production device of the high-strength plastic-steel composite pipe comprises a production device body and a plurality of forming molds arranged inside the composite pipe, the forming mold comprises a mold body, the semicircular opening of the mold body corresponds to the outline of the wall pipe, the rectangular opening edge of the mold body is affixed with a sealing frame pad, the surface of the sealing frame pad facing away from the mold body is pressed with a sealing plate, the sealing plate is provided with a plurality of heating devices, the heating devices are electrically connected to a power supply seat, and the edges of the sealing frame pad and the sealing plate are provided with through holes. The high-strength plastic-steel composite pipe and the production device thereof have the advantages of excellent performance and low production cost, and are suitable for general promotion and use.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic-steel composite pipes, and in particular relates to a high-strength plastic-steel composite pipe and a production device thereof. Background Art

[0002] The steel-plastic composite pipe is mainly based on polyethylene pipe, with high adhesion, anti-corrosion, food-grade hygienic polyethylene powder coating or epoxy resin coating on the outside. It is a water supply pipe made through pre-treatment, preheating, internal coating, leveling and post-treatment processes.

[0003] Existing steel-plastic composite pipes are usually single-layer structures with general strength and are more prone to damage during use. The most common situation is that the outside of the pipe is directly impacted and causes damage to the pipe. In addition, during the manufacturing process of existing plastic-steel pipes, it is often necessary to extrude corrugations on the outside to increase the overall structural strength. However, the heat source that promotes thermoplastic deformation is too far away from the pipe, and a single manufacturing requires a long heating time, resulting in unnecessary energy waste. Summary of the invention

[0004] The object of the present invention is to provide a high-strength plastic-steel composite pipe and a production device thereof to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-strength plastic-steel composite pipe, comprising a composite pipe body, wherein the composite pipe body is composed of an inner pipe located inside and a wall pipe covering the outside thereof, the outer circle of the wall pipe is provided with a plurality of ridges, the inside of the ridges are provided with steel belts, an outer pipe is provided outside the ridges, the contact portion between the inner pipe and the wall pipe is welded, the contact portion between the ridges and the outer pipe is welded, one end of the inner pipe is provided with a pipe accommodating portion, the other end of the inner pipe is provided with a pipe insertion portion, and the outer diameter of the pipe insertion portion corresponds to the inner diameter of the pipe accommodating portion.

[0006] A production device for high-strength plastic-steel composite pipes, comprising a production device body and a plurality of forming molds arranged inside the production device body, wherein the forming mold comprises a mold body, a sealing frame gasket is attached to the rectangular opening edge of the mold body, a sealing plate is pressed on the surface of the sealing frame gasket facing away from the mold body, and a plurality of heating devices are arranged on the sealing plate, and the heating devices are electrically connected to a power supply seat;

[0007] The heating device comprises a rod shell and an electric heating rod located inside the rod shell. The inner space of the rod shell is closed by an insulating cover, and the insulating cover has a conductive cover plate built in.

[0008] Preferably, the edges of the sealing frame gasket and the sealing plate are provided with through holes, the through holes in the edges of the sealing frame gasket and the sealing plate are provided with plate screws, and the plate screws are screwed into the threaded holes on the edges of the rectangular opening of the mold body.

[0009] Preferably, the rod shell is a test tube-like structure with one end open, the outer circle of the open end of the rod shell is provided with a shell end thread, the outer circle of the middle part of the rod shell is provided with a shell external thread, and the outer circle of the rod shell between the shell end thread and the shell external thread is provided with a shell shoulder.

[0010] Preferably, the internal space of the rod shell is composed of a shell main cavity and a shell end cavity, the internal spaces of the shell main cavity and the shell end cavity are interconnected and their axis lines coincide, an inner thread is machined on the inner wall of the shell end cavity, and a shell wall opening is drilled on the inner wall of the shell end cavity.

[0011] Preferably, an insulating ring is provided inside the shell wall opening, and a conductive shaft with through holes at both ends is provided inside the insulating ring, and the through holes at both ends of the conductive shaft radially penetrate the conductive shaft.

[0012] Preferably, a rod shoulder is provided at the end of the electric heating rod, and a first conductive sheet and a second conductive sheet are provided inside the rod shoulder. The outline of the first conductive sheet is block-shaped, and the outline of the second conductive sheet is L-shaped. A hexagonal groove is also provided inside the rod shoulder. The first conductive sheet is electrically connected to its adjacent conductive shaft through a wire, and the threaded portion of the insulating cover is engaged with the shell end thread. A conductive cover plate is provided in the cavity of the insulating cover facing away from the rod shell, and a conductive screw is provided inside the conductive cover plate to penetrate the conductive cover plate and the insulating cover, and the conductive screw is screwed into the threaded hole in the second conductive sheet.

[0013] Preferably, two of the heating devices are regarded as a group, and the heating devices in the same group are connected in series via a wire, and the wire is fixed in a through hole in the conductive shaft extending out of the electric heating rod.

[0014] Preferably, the power supply seat is provided with two elastic contact pieces, and the contact pieces are in contact with the conductive cover plate of the adjacent heating device.

[0015] Preferably, the connection gap between the electric heating rod and the rod shell is filled with thermal conductive silicone grease, and the interior of the mold body is filled with silicone oil.

[0016] The technical effects and advantages of the present invention are as follows: the composite pipe body composed of the inner pipe and the wall pipe has good deformation strength, and the outer wall pipe adopts a multi-layer structure with good bending performance, and plays a role in protecting the inner pipe, and the structure of the ridges and the steel belt has a buffering effect on the impact of the outside, thereby protecting the inner pipe, and when the composite pipe body is bent, the inner bend of the wall pipe will cause the ridges to overlap and suppress the bending, which can prevent the inner pipe from being damaged by excessive bending;

[0017] Silicone oil is directly built into the mold body and heated by a heating device. Since the silicone oil as a heat source is close to the workpiece, a faster heating effect can be obtained, thereby accelerating the processing speed of the composite pipe body. Since the heating speed is faster, the time required is reduced, which indirectly reduces energy consumption and workpiece costs. The heating device as a heating element can be disassembled as a whole to inject oil into the mold body, and the insulating cover can be selectively removed to repair the internal electric heating rod, making daily use and maintenance easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the main structure of the composite pipe of the present invention;

[0020] Figure 3 It is a schematic diagram of the forming mold structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the forming die in a cut-away state of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the heating device of the present invention in a cutaway state;

[0023] Figure 6 It is a schematic structural diagram of a conductive cover plate of a heating device of the present invention in a cut-away state;

[0024] Figure 7 It is a schematic diagram of the structure of the heating device of the present invention in a separated state;

[0025] Figure 8 This is a schematic diagram of the cross-section structure of the rod shell of the present invention;

[0026] Fig. 9 It is a schematic diagram of the structure of the electric heating rod of the present invention.

[0027] In the figure: 1. composite pipe body; 101. inner pipe; 1011. pipe receiving portion; 1012. pipe inserting portion; 102. wall pipe; 1021. ridge; 1022. steel belt; 103. outer pipe; 2. forming die; 201. die body; 202. sealing frame gasket; 203. sealing plate; 204. plate screw; 205. heating device; 2051. rod shell; 2051A. shell main cavity; 2051B. shell end cavity; 2051C. shell external thread; 2051D , shell shoulder; 2051E, shell end thread; 2051F, shell internal thread; 2051G, shell wall opening; 2052, electric heating rod; 2052A, rod shoulder; 2052B, first conductive sheet; 2052C, second conductive sheet; 2052D, hexagonal groove; 2053, insulating cover; 2054, conductive cover; 2055, conductive screw; 2056, insulating ring; 2057, conductive shaft; 206, power supply socket; 206A, contact sheet; 3, main body of the production device. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] refer to Figure 1-Figure 2 A high-strength plastic-steel composite pipe comprises a composite pipe body 1, which is composed of an inner pipe 101 located inside and a wall pipe 102 covered outside. The outer circle of the wall pipe 102 is provided with a plurality of ridges 1021, and the ridges 1021 are provided with steel strips 1022 inside. The outer side of the ridges 1021 is provided with an outer pipe 103. The contact part between the inner pipe 101 and the wall pipe 102 is welded, and the contact part between the ridges 1021 and the outer pipe (103) is welded. The materials used for the inner pipe 101 and the wall pipe 102 are slightly different. The inner pipe 101 is made of a more flexible material, and the wall pipe 102 is made of a harder material. Due to the contour characteristics of the wall pipe 102, even if it is made of a harder material, its bending performance will not be excessively affected. One end of the inner pipe 101 is provided with a pipe accommodating portion 1011, and the other end of the inner pipe 101 is provided with a pipe inserting portion 1012. The outer diameter of the pipe inserting portion 1012 corresponds to the inner diameter of the pipe accommodating portion 1011.

[0030] refer to Figure 1 and Figure 3-Figure 6A production device for high-strength plastic-steel composite pipes includes a production device body 3 and a plurality of forming molds 2 arranged inside the production device body 3, wherein the forming mold 2 includes a mold body 201, a sealing frame gasket 202 is attached to the rectangular opening edge of the mold body 201, a sealing plate 203 is pressed on the surface of the sealing frame gasket 202 facing away from the mold body 201, and a plurality of heating devices 205 are arranged on the sealing plate 203, the heating device 205 is electrically connected to a power supply seat 206, the heating device 205 includes a rod shell 2051 and an electric heating rod 2052 located inside the rod shell 2051, the internal space of the rod shell 2051 is closed by an insulating cover 2053, and the insulating cover 2053 has a built-in conductive cover plate 2054.

[0031] refer to Figure 6-Figure 7 The edges of the sealing frame gasket 202 and the sealing plate 203 are provided with through holes, and the through holes in the edges of the sealing frame gasket 202 and the sealing plate 203 are provided with plate screws 204, which are screwed into the threaded holes on the edges of the rectangular opening of the mold body 201.

[0032] refer to Figure 6-Figure 8 The rod shell 2051 is a test tube-like structure with one end open. The outer circle of the open end of the rod shell 2051 is provided with a shell end thread 2051E, the outer circle of the middle part of the rod shell 2051 is provided with a shell external thread 2051C, and the outer circle of the rod shell 2051 between the shell end thread 2051E and the shell external thread 2051C is provided with a shell shoulder 2051D. The internal space of the rod shell 2051 is composed of a shell main cavity 2051A and a shell end cavity 2051B. The internal spaces of 2051A and the shell end cavity 2051B are interconnected and their axial center lines coincide. An internal shell thread 2051F is machined on the inner wall of the shell end cavity 2051B. A shell wall opening 2051G is also drilled on the inner wall of the shell end cavity 2051B. An insulating ring 2056 is provided inside the shell wall opening 2051G. A conductive shaft 2057 with through holes at both ends is provided inside the insulating ring 2056. The through holes at both ends of the conductive shaft 2057 radially penetrate it.

[0033] refer to Figure 4-Figure 8The end of the electric heating rod 2052 is provided with a rod shoulder 2052A, and a first conductive sheet 2052B and a second conductive sheet 2052C are provided inside the rod shoulder 2052A. The outline of the first conductive sheet 2052B is block-shaped, and the outline of the second conductive sheet 2052C is L-shaped. A hexagonal groove 2052D is also provided inside the rod shoulder 2052A, and the hexagonal groove 2052D is used to screw in an inner hexagonal wrench, so as to realize the wrench installation and removal of the electric heating rod 2052. The first conductive sheet 2052B is electrically connected to the conductive shaft 2057 adjacent to it through a wire, and the threaded portion of the insulating cover 2053 is connected to the insulating cover 2053. The shell end thread 2051E is engaged, and a conductive cover plate 2054 is provided in the cavity of the insulating cover 2053 facing away from the rod shell 2051. A conductive screw 2055 is provided inside the conductive cover plate 2054 to penetrate the conductive cover plate 2054 and the insulating cover 2053. The conductive screw 2055 is screwed into the threaded hole in the second conductive sheet 2052C. The two heating devices 205 are regarded as a group, and the heating devices 205 in the same group are connected in series through a wire, and the wire is fixed in a through hole in the conductive shaft 2057 extending out of the electric heating rod 2052. The conductive cover plate 2054 is made of copper, because it contacts smoothly with the contact sheet 206A.

[0034] refer to Figure 4-Figure 5 The power supply seat 206 is provided with two elastic contacts 206A, which are in contact with the conductive cover plate 2054 of the adjacent heating device 205. The contacts 206A complete the power supply of the heating device 205. The connection gap between the electric heating rod 2052 and the rod shell 2051 is filled with thermal grease, and the inside of the mold body 201 is filled with silicone oil, which can also be replaced by other liquid and insulating thermal conductive media.

[0035] Working principle: the high-strength plastic-steel composite pipe and its production device, the composite pipe body 1 composed of the inner pipe 101 and the wall pipe 102 has good deformation strength. Since the outer wall pipe 102 adopts a corrugated structure, it has good bending performance and plays a role in protecting the inner pipe 101. The corrugated structure has a buffering effect on the impact of the outside world, thereby protecting the inner pipe 101. When the composite pipe body 1 is bent, the inner bend of the wall pipe 102 will be superimposed on each other to inhibit bending, which can prevent the inner pipe 101 from being damaged by excessive bending.

[0036] Silicone oil is directly built into the mold body 201, and the silicone oil is heated by the heating device 205. Since the silicone oil as a heat source is close to the workpiece, a relatively fast heating effect can be obtained, thereby accelerating the processing speed of the composite pipe body 1. Since the heating speed is faster, the required time is reduced, which indirectly plays a role in reducing energy consumption and workpiece costs. The heating device 205 as a heating element can be disassembled as a whole to inject oil into the mold body 201, and the insulating cover 2054 can also be selectively removed to repair the internal electric heating rod 2052, making daily use and maintenance easier;

[0037] The inner tube 101, the wall tube 102 and the outer tube 103 are all prefabricated tubes. A production device for a high-strength plastic-steel composite tube is used to complete the combination of the inner tube 101 and the wall tube 102. The ridges in the inner cavity of the mold body 201 will be embedded in the gaps between the ridges 1021. As the temperature of the mold body 201 increases, the inner tube 101 and the mold body 201 will be welded together, which also plays a role in shaping the ridges 1021.

[0038] The above description is only a preferred specific implementation manner of the invention, but the protection scope of the invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the invention according to the technical scheme and inventive concept of the invention, which should be covered by the protection scope of the invention.

Claims

1. A production device for high-strength plastic-steel composite pipes, characterized in that: The production device comprises a main body (3) and a plurality of forming dies (2) arranged inside the main body (3), wherein the forming dies (2) comprise a die body (201), a sealing frame gasket (202) is attached to the edge of a rectangular opening of the die body (201), a sealing plate (203) is pressed on the surface of the sealing frame gasket (202) facing away from the die body (201), a plurality of heating devices (205) are arranged on the sealing plate (203), and the heating devices (205) are electrically connected to a power supply seat (206); The heating device (205) comprises a rod shell (2051) and an electric heating rod (2052) located inside the rod shell, the internal space of the rod shell (2051) is closed by an insulating cover (2053), and the insulating cover (2053) has a built-in conductive cover plate (2054); The edges of the sealing frame gasket (202) and the sealing plate (203) are provided with through holes, the through holes in the edges of the sealing frame gasket (202) and the sealing plate (203) are provided with plate screws (204), and the plate screws (204) are screwed into threaded holes at the edges of the rectangular openings of the mold body (201); The rod shell (2051) is a test tube-like structure with one end open; a shell end thread (2051E) is formed on the outer circle of the open end of the rod shell (2051); a shell external thread (2051C) is formed on the outer circle of the middle part of the rod shell (2051); and a shell shoulder (2051D) is formed on the outer circle of the rod shell (2051) between the shell end thread (2051E) and the shell external thread (2051C); The connection gap between the electric heating rod (2052) and the rod shell (2051) is filled with thermal conductive silicone grease, and the interior of the mold body (201) is filled with silicone oil; The high-strength plastic-steel composite pipe comprises a composite pipe body (1), wherein the composite pipe body (1) is composed of an inner pipe (101) located inside and a wall pipe (102) covering the outer portion thereof, the outer circumference of the wall pipe (102) is provided with a plurality of ridges (1021), the inner portions of the ridges (1021) are each provided with a steel strip (1022), the outer portion of the ridges (1021) is provided with an outer pipe (103), the contact portion between the inner pipe (101) and the wall pipe (102) is welded, the contact portion between the ridges (1021) and the outer pipe (103) is welded, one end of the inner pipe (101) is provided with a pipe receiving portion (1011), the other end of the inner pipe (101) is provided with a pipe inserting portion (1012), the outer diameter of the pipe inserting portion (1012) corresponds to the inner diameter of the pipe receiving portion (1011); The production device for the high-strength plastic-steel composite pipe is used to complete the combination of the inner pipe (101) and the wall pipe (102), and the ridges in the inner cavity of the mold body (201) will be embedded in the gaps between the ridges (1021).

2. The production device of a high-strength plastic-steel composite pipe according to claim 1 is characterized in that: The internal space of the rod shell (2051) is composed of a shell main cavity (2051A) and a shell end cavity (2051B); the internal spaces of the shell main cavity (2051A) and the shell end cavity (2051B) are interconnected and their axis lines coincide with each other; an internal shell thread (2051F) is machined on the inner wall of the shell end cavity (2051B); and a shell wall opening (2051G) is drilled on the inner wall of the shell end cavity (2051B).

3. The production device of a high-strength plastic-steel composite pipe according to claim 2 is characterized in that: An insulating ring (2056) is provided inside the shell wall opening (2051G), and a conductive shaft (2057) with through holes at both ends is provided inside the insulating ring (2056), wherein the through holes at both ends of the conductive shaft (2057) penetrate the conductive shaft (2057) radially.

4. The production device of a high-strength plastic-steel composite pipe according to claim 3 is characterized in that: The end of the electric heating rod (2052) is provided with a rod shoulder (2052A), and a first conductive sheet (2052B) and a second conductive sheet (2052C) are provided inside the rod shoulder (2052A). The first conductive sheet (2052B) has a block-shaped outline, and the second conductive sheet (2052C) has an L-shaped outline. A hexagonal groove (2052D) is also provided inside the rod shoulder (2052A). The first conductive sheet (2052B) is connected to an adjacent conductive sheet via a wire. The conductive shaft (2057) is electrically connected, the threaded portion of the insulating cover (2053) engages with the shell end thread (2051E), a conductive cover plate (2054) is provided in the cavity of the insulating cover (2053) facing away from the rod shell (2051), a conductive screw (2055) is provided inside the conductive cover plate (2054) and penetrates the conductive cover plate and the insulating cover (2053), and the conductive screw (2055) is screwed into the threaded hole in the second conductive sheet (2052C).

5. The production device of a high-strength plastic-steel composite pipe according to claim 1 is characterized in that: Two of the heating devices (205) are considered as a group, and the heating devices (205) in the same group are connected in series via a wire, and the wire is fixed in a through hole in a conductive shaft (2057) extending out of the electric heating rod (2052).

6. The production device of a high-strength plastic-steel composite pipe according to claim 1 is characterized in that: The power supply seat (206) is provided with two elastic contact pieces (206A), and the contact pieces (206A) are in contact with the conductive cover plate (2054) of the adjacent heating device (205).

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