CN109555929B - Electric melting bent pipe fitting and rear wire laying process thereof - Google Patents
Electric melting bent pipe fitting and rear wire laying process thereof Download PDFInfo
- Publication number
- CN109555929B CN109555929B CN201710880511.0A CN201710880511A CN109555929B CN 109555929 B CN109555929 B CN 109555929B CN 201710880511 A CN201710880511 A CN 201710880511A CN 109555929 B CN109555929 B CN 109555929B
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- cutter
- heating wire
- wire
- electric heating
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
The invention discloses an electric melting bent pipe fitting, which comprises a bent pipe fitting, a first electric heating wire ring and a second electric heating wire ring, wherein the first electric heating wire ring and the second electric heating wire ring are embedded in inner pipe walls at two ends of the bent pipe fitting and are mutually connected through a bridging electric heating wire, and the first electric heating wire ring, the second electric heating wire ring and the bridging electric heating wire are continuously arranged by one electric heating wire.
Description
Technical Field
The invention relates to the field of plastic pipe fittings, in particular to an electric melting bent pipe fitting and a wire laying process thereof.
Background
The PE electric melting pipe fittings are divided into bare wire exposed electric melting pipe fittings, plastic covered electric melting pipe fittings and rear wire laying electric melting pipe fittings, the three processes have advantages, the electric melting interfaces of the bare wire electric melting pipe fittings which are welded under the same conditions have better peel strength and welding operation fault tolerance than the electric melting pipe fittings produced by other processes, the connection of the plastic covered electric melting pipe fittings on the steel wire mesh framework PE pipe has unique advantages, the rear wire laying electric heating wire electric melting pipe fittings are formed by turning and then inserting wires of injection molding pipe blanks, so the former two production processes cannot be achieved in size precision, wherein a cutter for processing the rear wire laying of the electric melting pipe fittings and an operation process for carrying out the rear wire laying of the electric melting pipe fittings by using the cutter are disclosed in a Chinese patent with the application number of CN201610224262.5 named as the cutter for carrying out the exposed rear wire laying of the pipe fittings.
To back cloth silk electric smelting pipe fitting, need set up electrically conductive terminal at the tip of pipe fitting for switch on with the heating wire in the pipe fitting, and then when realizing the circular telegram, the heating wire generates heat then to pipe fitting electric fusion welding. When the wire is distributed later in the bent pipe, the existing technology firstly distributes the wire at one end of the bent pipe, then reserves a section of electric heating wire towards the inner end of the bent pipe, distributes the wire at the other end of the bent pipe, reserves a section of electric heating wire towards the inner end of the bent pipe, and finally twists the electric heating wires at the two ends together to realize the conduction of the electric heating wires at the two ends of the bent pipe.
However, by adopting the above mode, when the electric heating wire is electrified to be subjected to electric fusion welding, the bent pipe fitting is easy to fuse the twisted electric heating wire, and the problem that the pipe fittings can not be welded due to the fusion of the electric heating wire frequently occurs in the use process.
Disclosure of Invention
A first object of the present invention is to provide an electric fused pipe bender in which an internal heating wire is not easily fused.
To achieve the first object, the following technical means are adopted: an electric smelting pipe bending fitting, includes pipe bending fitting and inlays first electric heating wire circle and the second electric heating wire circle of pipe wall in pipe bending fitting both ends, first electric heating wire circle and second electric heating wire circle are interconnected through the bridging heating wire, and first electric heating wire circle, second electric heating wire circle and bridging heating wire are set up by a heating wire in succession.
The method is further optimized as follows: the two ends of the elbow fitting are respectively provided with a circle of valve cavity gear rings on the inner pipe wall close to the corner, a yielding groove is arranged between the valve cavity gear rings and the inner pipe wall, and a bridging electric heating wire connecting the first electric heating wire ring and the second electric heating wire ring penetrates through the yielding groove.
The method is further optimized as follows: the abdicating groove is positioned at one end of the inner side of the bend of the bent pipe fitting.
A second object of the present invention is to provide a process for manufacturing an electric melting elbow fitting, in which an internal heating wire is not easily melted.
To achieve the second object, the following technical means are adopted: the utility model provides a back cloth silk technology of electric smelting elbow fitting, includes heating wire and cutter, the cutter is including the threading portion that is used for passing the heating wire, be used for carrying out grooved fluting portion and be used for impressing the line ball portion in elbow fitting wire casing to the pipe fitting inner tube wall in the elbow fitting, includes following step:
1) clamping, namely, installing a pipe bending piece and a cutter on a lathe, and penetrating one end of an electric heating wire into a threading part of the cutter to enable the end part of the electric heating wire to correspond to a wire pressing part;
2) distributing wires for the first time, wherein the slotting part of the cutter is aligned to the inner wall of one end of the bent pipe fitting, the lathe drives the bent pipe fitting to rotate, meanwhile, the cutter moves inwards towards the axial direction of the bent pipe fitting, and the wire pressing part behind the slotting part presses the heating wires into the wire grooves while the slotting part at the front end of the cutter opens the wire grooves on the inner wall of the bent pipe fitting;
3) withdrawing the cutter and cutting the wires, stopping the first wire distribution after the electric heating wires are distributed into one end of the bent pipe fitting to form a first electric heating wire ring, withdrawing the cutter from the bent pipe fitting and cutting off the electric heating wires, and meeting the requirement that the length of a reserved electric heating wire connected with the first electric heating wire ring is more than or equal to the sum of the lengths of the bridging electric heating wire and the second electric heating wire ring;
4) clamping again, namely enabling the end part of the reserved heating wire to penetrate through a yielding groove in the bent pipe fitting and penetrate out of the bent pipe fitting from the other end of the bent pipe fitting, reversely clamping the bent pipe fitting on a lathe to enable the other end of the bent pipe fitting to face a cutter, penetrating the reserved heating wire into a threading part on the cutter and controlling the cutter to stretch into the bent pipe fitting;
5) distributing wires for the second time, wherein the slotting part of the cutter is aligned to the inner wall of the bent pipe fitting, the lathe drives the bent pipe fitting to rotate, meanwhile, the cutter moves outwards in the axial direction of the bent pipe fitting, the wire pressing part behind the slotting part presses the rest of the heating wires into the wire grooves while the slotting part at the front end of the cutter opens the wire grooves in the inner wall of the bent pipe fitting, and a second heating wire ring is formed at the other end of the bent pipe fitting;
6) and stopping and retracting the cutter.
The method is further optimized as follows: the slotting part of the cutter comprises a slotting cutter head, the line pressing part comprises a pressing wheel, a threading cavity capable of penetrating a heating wire is further arranged between the slotting cutter head and the pressing wheel, the inlet of the threading cavity is located at one end of the knife back of the cutter, the outlet of the threading cavity is located at one end of the slotting cutter head, and the outlet of the threading cavity is located between the slotting cutter head and the pressing wheel.
Compared with the prior art, the invention has the advantages that: after the wire arrangement process is adopted, even if the pipe bending piece is adopted, the internal heating wires can be continuously arranged, and compared with the problem that two sections of heating wire rings in the existing pipe bending piece are easily fused by twisting, the invention has the advantages that the heating wires in the pipe bending piece are continuously and completely arranged, and the probability of fusing the heating wires after being electrified is greatly reduced.
Drawings
Fig. 1 is an overall external schematic view of an electrofusion elbow fitting in the present embodiment;
fig. 2 is a schematic half-section internal view of the electrofusion bent pipe member in the present embodiment (without heating wire);
fig. 3 is a schematic half-section internal view of the electrofusion bent pipe member in the present embodiment (with a hot wire);
fig. 4 is a threading pattern of the heating wire in the bent pipe member after the completion of the first coil in the present embodiment;
FIG. 5 is a schematic diagram of a twist connection between two coils in a prior art elbow;
fig. 6 and 7 are schematic axial views of the cutter in the present embodiment.
In the figure, 1, a bent pipe fitting; 11. a first wire slot; 12. a second wire slot; 2. a conductive binding post; 31. a first electric heating wire coil; 32. a second electric heating wire coil; 321. reserving an electric heating wire; 33. bridging the heating wires; 34. a twist joint; 4. a valve cavity gear ring; 41. a yielding groove; 5. a cutter; 6. grooving cutter heads; 7. a pinch roller; 71. knurling; 81. a threading cavity inlet; 82. and a threading cavity outlet.
Detailed Description
The invention will be further described by means of specific embodiments, which are given by way of illustration only and are not intended to limit the scope of the invention.
Examples
The electric melting elbow fitting 1, firstly refer to fig. 1, is an overall appearance diagram of the electric melting elbow fitting 1, wherein two ends of the elbow fitting 1 are respectively provided with an electric conduction binding post 2, and refer to fig. 2 and 3 continuously, two ends of the elbow fitting 1 are respectively provided with a first wire groove 11 and a second wire groove 12 for embedding a first electric heating wire coil 31 and a second electric heating wire coil 32, both ends of the elbow fitting 1 are provided with a valve cavity shift ring 4 near a corner, a relief groove 41 is arranged between the valve cavity shift ring 4 and a pipe wall to facilitate a bridging electric heating wire 33 connecting the first wire groove 11 and the second wire groove 12 to pass through, and the first electric heating wire, the bridging electric heating wire 33 and the second electric heating wire are all arranged through one continuous heating wire, and the relief groove 41 is arranged on one side of a curved inner side wall of the elbow fitting 1, thereby reducing the arrangement length of the bridging electric heating wire 33.
Compared with the prior art electric melting bent pipe fitting 1, see fig. 5, which is a schematic diagram of the arrangement of the heating wires inside the prior art bent pipe fitting 1, the reserved sections of the first heating wire coil 31 and the second heating wire coil 32 are butted with each other in a manner of a twisted joint 34, and the non-whole heating wires are arranged continuously, and in this arrangement, after power is turned on, the resistance of the twisted joint 34 is large, and the heating wires are easily fused.
Referring to fig. 6-7, a cutting tool 5 used in the wire laying process for the elbow fitting 1 comprises a grooving tool bit and a pressing wheel 7, a threading cavity capable of passing through a heating wire is further arranged between the grooving tool bit and the pressing wheel 7, an inlet 81 of the threading cavity is arranged at one end of a back of the cutting tool 5, an outlet 82 of the threading cavity is arranged at one end of the grooving tool bit, an outlet 82 of the threading cavity is arranged between the grooving tool bit and the pressing wheel 7, and in order to reduce the possibility of slippage between the pressing wheel 7 and the heating wire, knurling 71 is further arranged on a wheel surface of the pressing wheel 7.
With reference to the attached figures 2-4, the post wire laying process for processing the electric melting elbow fitting 1 with the built-in continuous electric heating wire comprises the following steps:
1) clamping, namely, loading the pipe bending part 1 and the cutter 5 on a lathe, and penetrating one end of the electric heating wire into a threading part of the cutter 5 to enable the end part of the electric heating wire to correspond to the wire pressing part;
2) distributing wires for the first time, wherein the slotting part of the cutter 5 is aligned to the inner wall of one end of the bent pipe fitting 1, the lathe drives the bent pipe fitting 1 to rotate, meanwhile, the cutter 5 moves inwards towards the axial direction of the bent pipe fitting 1, and the wire pressing part behind the slotting part presses the heating wires into the wire grooves at the same time when the slotting part at the front end of the cutter 5 opens the wire grooves on the inner wall of the bent pipe fitting 1;
3) withdrawing the cutter and cutting the wire, stopping the first wire distribution after the first electric heating wire ring 31 is formed by distributing the electric heating wire into one end of the elbow pipe fitting 1, withdrawing the cutter 5 from the elbow pipe fitting 1 and cutting off the electric heating wire, and meeting the requirement that the length of the reserved electric heating wire 321 connected with the first electric heating wire ring 31 is more than or equal to the sum of the lengths of the bridging electric heating wire 33 and the second electric heating wire ring 32;
4) clamping again, the end part of the reserved heating wire penetrates through the abdicating groove 41 in the elbow fitting 1 and penetrates out of the elbow fitting 1 from the other end, reversely clamping the elbow fitting 1 on the lathe to enable the other end of the elbow fitting 1 to face the cutter 5, penetrating the reserved heating wire 321 on the cutter 5 into the threading part and controlling the cutter 5 to stretch into the elbow fitting 1;
5) the second time cloth silk, the inner wall of elbow fitting 1 is aimed at to the fluting portion of cutter 5, and lathe drive elbow fitting 1 rotates, and cutter 5 moves outwards towards elbow fitting 1 axial simultaneously, in the slot portion of 5 front ends of cutter opens out the wire casing to elbow fitting 1 inner wall, is in the line ball portion at fluting portion rear and impresses the wire casing with remaining heating wire simultaneously, forms second heating wire circle 32 at the other end of elbow fitting 1:
6) and stopping and retracting the cutter.
Comparative example
Taking 100 electric fuse elements 1 of the present invention and 100 electric fuse elements 1 of the prior art as examples, 12 heating wires inside the electric fuse elements 1 of the prior art are fused at the portions of the twisted joints 34 within a period of 3 minutes of energization, whereas none of the electric fuse elements 1 of the present invention are fused, and a difference in time for processing a single electric fuse element 1 is not more than 10 seconds.
The table shows that the quality of the electric melting pipe fitting is greatly improved on the basis of hardly reducing the processing efficiency of a single electric melting pipe fitting.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (2)
1. The post wire distribution process of the electric melting bent pipe fitting comprises an electric heating wire and a cutter (5), wherein the cutter (5) comprises a wire penetrating part for penetrating the electric heating wire, a slotting part for slotting the inner wall of the bent pipe fitting (1) and a wire pressing part for pressing the electric heating wire into a wire slot of the bent pipe fitting (1), and the post wire distribution process comprises the following steps of:
1) clamping, namely, loading the pipe bending part (1) and a cutter (5) on a lathe, and penetrating one end of the electric heating wire into a threading part of the cutter (5) to enable the end part of the electric heating wire to correspond to the wire pressing part;
2) distributing wires for the first time, aligning the slotting part of the cutter (5) to the inner wall of one end of the elbow piece (1), driving the elbow piece (1) to rotate by a lathe, simultaneously moving the cutter (5) inwards towards the axial direction of the elbow piece (1), and pressing the electric heating wires into the wire grooves by the wire pressing part behind the slotting part while slotting the inner wall of the elbow piece (1) by the slotting part at the front end of the cutter (5);
3) withdrawing the cutter and cutting the wires, stopping the first wire distribution after a first electric heating wire ring (31) is formed at one end of the electric heating wire distributed into the bent pipe fitting (1), withdrawing the cutter (5) from the bent pipe fitting (1) and cutting off the electric heating wire, and meeting the requirement that the length of a reserved electric heating wire connected with the first electric heating wire ring (31) is more than or equal to the sum of the lengths of the bridging electric heating wire (33) and the second electric heating wire ring (32);
4) clamping again, enabling the end part of the reserved heating wire to penetrate through a yielding groove (41) in the bent pipe fitting (1) and penetrate out of the bent pipe fitting (1) from the other end, reversely clamping the bent pipe fitting (1) on a lathe to enable the other end of the bent pipe fitting (1) to face a cutter (5), penetrating the reserved heating wire into a threading part on the cutter (5) and controlling the cutter (5) to stretch into the bent pipe fitting (1);
5) distributing wires for the second time, wherein the slotting part of the cutter (5) is aligned to the inner wall of the elbow piece (1), the lathe drives the elbow piece (1) to rotate, meanwhile, the cutter (5) moves outwards in the axial direction of the elbow piece (1), when the slotting part at the front end of the cutter (5) opens a wire slot on the inner wall of the elbow piece (1), the wire pressing part behind the slotting part presses the rest of the heating wires into the wire slot, and a second heating wire ring (32) is formed at the other end of the elbow piece (1);
6) and stopping and retracting the cutter.
2. The post wire distribution process of the electrofusion bent tube fitting according to claim 1, characterized in that the grooving part of the cutter (5) comprises a grooving cutter head, the wire pressing part comprises a press wheel (7), a threading cavity capable of passing through the electric heating wire is further arranged between the grooving cutter head and the press wheel (7), an inlet (81) of the threading cavity is located at one end of the back of the cutter (5), an outlet (82) of the threading cavity is located at one end of the grooving cutter head, and the outlet (82) of the threading cavity is located between the grooving cutter head and the press wheel (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710880511.0A CN109555929B (en) | 2017-09-26 | 2017-09-26 | Electric melting bent pipe fitting and rear wire laying process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710880511.0A CN109555929B (en) | 2017-09-26 | 2017-09-26 | Electric melting bent pipe fitting and rear wire laying process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109555929A CN109555929A (en) | 2019-04-02 |
| CN109555929B true CN109555929B (en) | 2021-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710880511.0A Expired - Fee Related CN109555929B (en) | 2017-09-26 | 2017-09-26 | Electric melting bent pipe fitting and rear wire laying process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109555929B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2194749A (en) * | 1986-09-09 | 1988-03-16 | Du Pont | Method of manufacturing heat-weldable thermoplastic fittings |
| IT1291331B1 (en) * | 1997-05-09 | 1999-01-07 | Nupi S P A | CONNECTION WITH THERMOELECTRIC ADHESION |
| CN1164885C (en) * | 2001-10-26 | 2004-09-01 | 甘国工 | Silane crosslinked polyethylene pipe connecting pipe with electrothermal wire |
| CN202432166U (en) * | 2011-12-28 | 2012-09-12 | 宁波市宇华电器有限公司 | Combined large-caliber fused elbow pipe fitting |
| CN202647034U (en) * | 2012-06-01 | 2013-01-02 | 宁波市宇华电器有限公司 | Polythene electric melt pipe fitting |
| CN104061396B (en) * | 2014-05-08 | 2016-06-08 | 浙江庆发管业科技有限公司 | A kind of rear cloth wire form PE electric-melting flange and production technology thereof continuously |
| CN203927216U (en) * | 2014-05-08 | 2014-11-05 | 浙江庆发管业科技有限公司 | A kind of rear cloth silk electric smelting saddle type bypass |
| CN204852746U (en) * | 2015-06-15 | 2015-12-09 | 宁波市宇华电器有限公司 | Heavy -calibre electric smelting elbow pipe fitting |
| CN206429795U (en) * | 2016-12-20 | 2017-08-22 | 上海乔治费歇尔亚大塑料管件制品有限公司 | Electric heating melting bend pipe tools |
| CN206445232U (en) * | 2017-01-09 | 2017-08-29 | 宁波恒元精工管阀科技有限公司 | A kind of cutter for exposed rear cloth silk |
-
2017
- 2017-09-26 CN CN201710880511.0A patent/CN109555929B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN109555929A (en) | 2019-04-02 |
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Granted publication date: 20210105 Termination date: 20210926 |