CN112984258A - Electric hot melting pipe fitting and manufacturing process - Google Patents
Electric hot melting pipe fitting and manufacturing process Download PDFInfo
- Publication number
- CN112984258A CN112984258A CN202110455385.0A CN202110455385A CN112984258A CN 112984258 A CN112984258 A CN 112984258A CN 202110455385 A CN202110455385 A CN 202110455385A CN 112984258 A CN112984258 A CN 112984258A
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- Prior art keywords
- pipe
- layer
- steel
- polyethylene
- pipe fitting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/02—Welded joints; Adhesive joints
- F16L47/03—Welded joints with an electrical resistance incorporated in the joint
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
- B29D23/003—Pipe joints, e.g. straight joints
- B29D23/005—Pipe joints, e.g. straight joints provided with electrical wiring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses an electrothermal welding pipe fitting and a manufacturing process, wherein a pipe blank comprises an inner layer PE pipe, an outer steel wrapping piece, a polyethylene outer layer and a resistance wire, wherein the outer steel wrapping piece is wrapped outside the inner layer PE pipe, the polyethylene outer layer is wrapped outside the outer steel wrapping piece, and the resistance wire is arranged on the inner wall of the inner layer PE pipe; the manufacturing steps are as follows: extruding an inner layer PE pipe, processing by a first vacuum sizing forming unit and cooling; step two: wrapping an outer steel wrapping part outside the inner layer PE pipe, and then extruding a polyethylene outer layer by a polyethylene outer layer extruder; processing and cooling the mixture by a second vacuum sizing forming unit; step three: laying resistance wires on the inner wall of the tube blank semi-finished product to manufacture an electrothermal fusion tube, and finally packaging and warehousing; according to the invention, the steel-coated part is arranged on the middle layer of the pipe blank of the pipe fitting, so that the bearing capacity of the pipe fitting is enhanced, and the problem of pipe fitting stability reduction in the construction connection of the steel wire mesh framework reinforced polyethylene composite pipe and the high-pressure pipe connecting pipe fitting in the current market is solved.
Description
Technical Field
The invention relates to the technical field of electric hot-melting pipe fittings, in particular to an electric hot-melting pipe fitting and a manufacturing process thereof.
Background
The electric melting pipe fitting is a connecting pipe fitting which is connected with a connected piece by melting the connected piece through the temperature generated by current. At present, the material of a common electric hot-melt pipe fitting is plastic, and the electric hot-melt pipe fitting connects plastic pipelines to form a long pipeline.
The connection pipe fitting of the steel wire mesh framework reinforced polyethylene composite pipe in the current market is a common electric hot melting pipe fitting, and has the following problems:
1. the electric hot melting pipe fitting needs to be heated and hot melted when the pipe is connected, the strength of the pipe fitting is influenced after hot melting, the quality and the pressure bearing capacity of the pipe fitting are reduced, and the pipe fitting becomes a weak point of a pipeline system.
2. The common electric hot-melt pipe fitting has limited pressure-bearing capacity, the maximum pressure-bearing capacity is 1.6Mpa, and the electric hot-melt pipe fitting has defects in the application field of high-pressure steel wire mesh framework reinforced polyethylene composite pipes.
Therefore, how to provide an electrothermal welding pipe fitting with high pressure-bearing capacity and a manufacturing process thereof are problems to be solved urgently by the technical personnel in the field.
Disclosure of Invention
Accordingly, the present invention is directed to an electrothermal welding tube and a manufacturing process thereof, which at least solve one of the problems set forth in the background art.
In order to realize the scheme, the invention adopts the following technical scheme:
an electric hot-melting pipe fitting comprises an inner layer PE pipe, an outer steel wrapping piece, a polyethylene outer layer and a resistance wire, wherein the outer steel wrapping piece wraps the inner layer PE pipe, the polyethylene outer layer wraps the outer steel wrapping piece, and the resistance wire is arranged on the inner wall of the inner layer PE pipe.
Preferably, in the above one of the electrofusion pipe fittings, the steel-clad member is hollow cylindrical.
Preferably, in the above electric hot-melting pipe, the steel-clad member is uniformly provided with chamfers.
Preferably, in the above electric hot-melt pipe, a glue layer is disposed between the steel-clad member and the polyethylene outer layer.
Preferably, in the above electric hot-melt pipe, the adhesive layer is a hot-melt adhesive layer.
Preferably, in the above electrothermal welding pipe fitting, the resistance wires are provided in a plurality, and each resistance wire is arranged on the inner wall of the inner PE pipe in a ring belt shape.
Preferably, in the above electric hot-melt pipe, the inner wall of the steel-clad part is closely attached to the outer wall of the inner PE pipe.
A manufacturing process of an electric hot melting pipe fitting comprises the following steps:
feeding a PE raw material into an inner layer PE pipe extruder, extruding an inner layer PE pipe into an inner layer PE pipe mould, processing by a first vacuum sizing forming unit, cooling, and cutting into inner layer PE pipes with fixed length by traction;
step two: wrapping the outer steel wrapping part outside the inner PE pipe prepared in the step one, then placing the inner PE pipe wrapping the outer steel wrapping part in a composite co-extrusion vacuum mold, feeding a PE raw material into a polyethylene outer layer extruder, extruding the polyethylene outer layer into the composite co-extrusion vacuum mold, and forming a polyethylene outer layer on the outer wall of the outer steel wrapping part; then the tube blank is processed by a second vacuum sizing forming unit, and after cooling, the tube blank is cut into a tube blank semi-finished product with a fixed length by traction;
step three: and (5) laying resistance wires on the inner wall of the tube blank semi-finished product in the step two, manufacturing an electric hot-melting tube, and finally packaging and warehousing.
Preferably, in the above manufacturing process of the electric hot-melt pipe fitting, in the second step, when the outer steel member is wrapped outside the inner PE pipe, the inner PE pipe and the outer steel member are in clearance fit in the earlier stage, and then the outer steel member is subjected to diameter reduction treatment, so that the inner wall of the outer steel member is tightly attached to the outer wall of the inner PE pipe.
Preferably, in the above manufacturing process of the electric hot melt pipe, in the second step, when the outer polyethylene layer is extruded by the outer polyethylene layer extruder, the hot melt adhesive is extruded by the hot melt adhesive extruder, and a hot melt adhesive layer is formed between the outer steel wrapping member and the outer polyethylene layer.
When the electric melting pipe fitting is used for connecting a pipe, a connecting section is arranged at the connecting end of the pipe, the connecting section of the pipe is inserted into a welding area where resistance wires are arranged on the electric melting pipe fitting, and then the resistance wires are electrified to carry out hot melting connection on the pipe and the pipe fitting.
According to the technical scheme, compared with the prior art, the invention discloses the electric hot-melting pipe fitting and the manufacturing process, the outer steel wrapping part is arranged on the middle layer of the pipe blank of the pipe fitting and used for enhancing the pressure bearing capacity of the pipe fitting, and the problem that the stability of the pipe fitting is reduced in the construction and connection process of the steel wire mesh framework reinforced polyethylene composite pipe and the high-pressure pipe connecting pipe fitting in the current market is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a cross-sectional view of an electrothermal welding tube according to the present invention;
FIG. 2 is an enlarged view of a portion of an electric hot-melt pipe according to the present invention;
FIG. 3 is a flow chart of an electrothermal welding pipe manufacturing process;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses an electrothermal fusion pipe fitting which comprises an inner layer PE pipe 1, an outer coating steel part 2, a polyethylene outer layer 3 and a resistance wire 4, wherein the outer coating steel part 2 is coated outside the inner layer PE pipe 1, the polyethylene outer layer 3 is coated outside the outer coating steel part 2, and the resistance wire 4 is arranged on the inner wall of the inner layer PE pipe 1.
In order to further optimize the technical scheme, the steel cladding member 2 is in a hollow cylindrical shape.
In order to further optimize the technical scheme, chamfers are uniformly arranged on the steel wrapping part 2.
In order to further optimize the technical scheme, a glue layer 5 is arranged between the steel wrapping part 2 and the polyethylene outer layer 3.
In order to further optimize the above technical solution, the glue layer 5 is a hot melt glue layer.
In order to further optimize the technical scheme, the resistance wires 4 are arranged in a plurality of numbers, and each resistance wire 4 is arranged on the inner wall of the inner layer PE pipe 1 in an annular belt shape.
In order to further optimize the technical scheme, the inner wall of the steel-coated part 2 is tightly attached to the outer wall of the inner PE pipe 1.
A manufacturing process of an electric hot melting pipe fitting comprises the following steps:
feeding a PE raw material into an inner layer PE pipe extruder 6, extruding an inner layer PE pipe into an inner layer PE pipe mould 7, processing by a first vacuum sizing forming unit 8, cooling, and cutting into inner layer PE pipes 1 with fixed length by traction;
step two: wrapping the outer-wrapping steel member 2 outside the inner-layer PE pipe 1 prepared in the step one through a pipe-turning frame 9, then placing the inner-layer PE pipe 1 wrapping the outer-wrapping steel member 2 in a composite co-extrusion vacuum mold 10, feeding PE raw materials into a polyethylene outer-layer extruder 11, extruding a polyethylene outer layer 3 into the composite co-extrusion vacuum mold 10, and forming the polyethylene outer layer 3 on the outer wall of the outer-wrapping steel member 2; then the tube blank is processed by a second vacuum sizing forming unit 19, and after cooling, the tube blank is cut into a tube blank semi-finished product 12 with a fixed length by traction;
step three: and (5) laying resistance wires 4 on the inner wall of the tube blank semi-finished product in the step two, manufacturing an electric hot-melting tube, and finally packaging and warehousing.
In order to further optimize the technical scheme, in the second step, when the outer steel wrapping part 2 is wrapped outside the inner layer PE pipe 1, the inner layer PE pipe 1 and the outer steel wrapping part 2 are in clearance fit in the early stage, and then the outer steel wrapping part 2 is subjected to diameter reduction treatment, so that the inner wall of the outer steel wrapping part 2 is tightly attached to the outer wall of the inner layer PE pipe 1.
In order to further optimize the technical scheme, in the second step, when the outer polyethylene layer 3 is extruded by the outer polyethylene layer extruder 11, hot melt adhesive is extruded by the hot melt adhesive extruder 13, and the hot melt adhesive layer 5 is formed between the outer package steel part 2 and the outer polyethylene layer 3.
When the electric melting pipe fitting is used for connecting a pipe, a connecting section 15 is arranged at the connecting end of the pipe 14, the connecting section 15 of the pipe 14 is inserted into a welding area of a resistance wire 4 arranged on the electric melting pipe fitting, then the resistance wire 4 is electrified, and the pipe 14 and the pipe 16 are connected in a hot melting mode.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The electric hot-melting pipe fitting is characterized by comprising an inner layer PE pipe, an outer layer steel part, an outer polyethylene layer and a resistance wire, wherein the outer layer steel part is wrapped outside the inner layer PE pipe, the outer polyethylene layer is wrapped outside the outer layer steel part, and the resistance wire is arranged on the inner wall of the inner layer PE pipe.
2. An electrofusion tube as claimed in claim 1, characterised in that the steel surround is hollow cylindrical.
3. An electrothermal welding pipe according to claim 1, wherein the steel cladding member is uniformly provided with chamfers.
4. An electrothermal welding pipe according to claim 1, wherein a glue layer is provided between the steel cladding and the polyethylene outer layer.
5. An electrothermal fuse tube according to claim 4, wherein the adhesive layer is a hot melt adhesive layer.
6. The electrothermal welding pipe fitting of claim 1, wherein the resistance wires are provided in a plurality, and each resistance wire is arranged on the inner wall of the inner PE pipe in a ring belt shape.
7. The electrofusion tube assembly of claim 1 wherein the inner wall of the steel surround is in intimate contact with the outer wall of the inner PE tube.
8. The manufacturing process of the electric hot melting pipe fitting is characterized by comprising the following steps of:
feeding a PE raw material into an inner layer PE pipe extruder, extruding an inner layer PE pipe into an inner layer PE pipe mould, processing by a first vacuum sizing forming unit, cooling, and cutting into inner layer PE pipes with fixed length by traction;
step two: wrapping the outer steel wrapping part outside the inner PE pipe prepared in the step one, then placing the inner PE pipe wrapping the outer steel wrapping part in a composite co-extrusion vacuum mold, feeding a PE raw material into a polyethylene outer layer extruder, extruding the polyethylene outer layer into the composite co-extrusion vacuum mold, and forming a polyethylene outer layer on the outer wall of the outer steel wrapping part; then the tube blank is processed by a second vacuum sizing forming unit, and after cooling, the tube blank is cut into a tube blank semi-finished product with a fixed length by traction;
step three: and (5) laying resistance wires on the inner wall of the tube blank semi-finished product in the step two, manufacturing an electric hot-melting tube, and finally packaging and warehousing.
9. The manufacturing process of the electrothermal welding pipe fitting according to claim 8, wherein in the second step, when the outer steel member is wrapped outside the inner layer PE pipe, the inner layer PE pipe is in clearance fit with the outer steel member in the early stage, and then the outer steel member is subjected to diameter reduction treatment, so that the inner wall of the outer steel member is tightly attached to the outer wall of the inner layer PE pipe.
10. The manufacturing process of an electrothermal welding pipe fitting according to claim 8, wherein in the second step, when the polyethylene outer layer extruder extrudes the polyethylene outer layer, the hot melt adhesive is extruded by the hot melt adhesive extruder, and a hot melt adhesive layer is formed between the outer steel wrapping member and the polyethylene outer layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110455385.0A CN112984258A (en) | 2021-04-26 | 2021-04-26 | Electric hot melting pipe fitting and manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110455385.0A CN112984258A (en) | 2021-04-26 | 2021-04-26 | Electric hot melting pipe fitting and manufacturing process |
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| Publication Number | Publication Date |
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| CN112984258A true CN112984258A (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110455385.0A Pending CN112984258A (en) | 2021-04-26 | 2021-04-26 | Electric hot melting pipe fitting and manufacturing process |
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| Country | Link |
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| CN (1) | CN112984258A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113580588A (en) * | 2021-08-10 | 2021-11-02 | 安徽杰蓝特新材料有限公司 | Processing technology of extrusion type RTP composite pressure pipe fitting |
| CN114526382A (en) * | 2022-03-01 | 2022-05-24 | 四川信固科技有限公司 | Enhanced electric hot-melting pipe fitting and preparation method thereof |
| CN117601456A (en) * | 2024-01-22 | 2024-02-27 | 四川省宜宾普什建材有限责任公司 | Processing technology of large-caliber electric melting type plastic pipe fitting |
-
2021
- 2021-04-26 CN CN202110455385.0A patent/CN112984258A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113580588A (en) * | 2021-08-10 | 2021-11-02 | 安徽杰蓝特新材料有限公司 | Processing technology of extrusion type RTP composite pressure pipe fitting |
| CN114526382A (en) * | 2022-03-01 | 2022-05-24 | 四川信固科技有限公司 | Enhanced electric hot-melting pipe fitting and preparation method thereof |
| CN117601456A (en) * | 2024-01-22 | 2024-02-27 | 四川省宜宾普什建材有限责任公司 | Processing technology of large-caliber electric melting type plastic pipe fitting |
| CN117601456B (en) * | 2024-01-22 | 2024-03-26 | 四川省宜宾普什建材有限责任公司 | Processing technology of large-caliber electric melting type plastic pipe fitting |
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