CN211423670U

CN211423670U - A binding post and PE electric smelting pipe fitting for PE electric smelting pipe fitting

Info

Publication number: CN211423670U
Application number: CN201922311746.5U
Authority: CN
Inventors: 王志伟; 吴志峰; 娄玉川; 丁永跃; 徐兴同
Original assignee: Shanghai George Fischer Chinaust Plastics Fittings Corp ltd
Current assignee: Shanghai George Fischer Chinaust Plastics Fittings Corp ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-09-04
Anticipated expiration: 2029-12-20

Abstract

The application discloses a binding post and PE electric smelting pipe fitting for PE electric smelting pipe fitting relates to bury ground polyethylene pipeline for pipeline. Binding post adopts the punching press of copper alloy board to form, and binding post includes: hollow cylinder, linkage segment and rectangle base. After the wiring terminal is meshed and fastened with the resistance wire, the whole body is injected into the body of the PE electric melting pipe fitting. The wiring terminal is formed by stamping copper alloy, so that the copper resource is greatly saved while the performance is guaranteed, the cost is reduced, and the processing efficiency is improved. Adopt constitute hollow specific structure by hollow cylinder, linkage segment and rectangular base and wholly mould plastics into PE electric smelting pipe fitting body after fastening with the resistance wire interlock, effectively avoided because the poor contact that the interference is not enough leads to causes PE electric smelting pipe fitting welding failure problem, effectively improved the electrical properties of PE electric smelting pipe fitting, greatly guaranteed the safety in utilization of PE electric smelting pipe fitting.

Description

A binding post and PE electric smelting pipe fitting for PE electric smelting pipe fitting

Technical Field

The application relates to a Polyethylene (PE) pipeline for a buried pipeline, in particular to a connecting terminal for a PE electric melting pipe fitting and the PE electric melting pipe fitting.

Background

The PE pipeline for the buried pipeline comprises a PE pipe and a buried pipeline connecting piece. The buried pipeline connecting piece comprises a PE electric melting pipe fitting. The PE electric melting pipe fitting is a PE pipe fitting with a resistance wire embedded inside. PE electric smelting pipe fitting includes PE main part, embedded resistance wire and the binding post in PE main part inner wall department. The PE pipe fitting is provided with two connecting ports at positions close to the end portions, a connecting terminal is arranged in each connecting port, and the connecting terminals are connected with the resistance wires. During welding, after two sections of PE pipes to be welded are inserted into the same PE electric melting pipe fitting from two directions, an electric melting welding machine is used for electrifying a resistance wire embedded in the PE electric melting pipe fitting through a wiring terminal, so that the inner surface of the PE electric melting pipe fitting and the outer surface of the adjacent PE pipe fitting are heated and melted, after the melted part is cooled, the PE electric melting pipe fitting and the two sections of PE pipes form a whole, and therefore the connection of the two sections of PE pipes is completed.

The wiring terminal is a key connecting piece of the electric fusion welding machine for electrically heating the PE electric fusion pipe fitting. Current binding post is the entity terminal of making with the bar copper, and upper portion is solid cylinder and is used for connecting outside electric fusion welding machine, and the lower part is bamboo joint formula base or protruding solid base for use interference pressure equipment mode to connect in the PE main part, initial positioning when having the pore to be used for winding the resistance wire on the base.

In the prior art, the wiring terminal is made of solid copper metal, so that the problem of high cost exists. The mode that binding post and heating wire link to each other or twine the back and press together with the interference mode, or the mechanical mode of pressing flat again in the heating wire patchhole after the drilling, above-mentioned connected mode all has the interference not enough, often can cause contact failure when the circular telegram because pressure variation, and then causes the welding failure.

SUMMERY OF THE UTILITY MODEL

It is an object of the present application to overcome the above problems or to at least partially solve or mitigate the above problems.

According to an aspect of the application, a binding post for PE electric smelting pipe fitting is provided for connect the circular telegram with the embedded resistance wire of PE electric smelting pipe fitting with outside electric fusion welding machine, binding post adopts the punching press of copper alloy board to form, binding post includes:

the outer diameter of the hollow cylinder is of a standard size and is used for being connected with an external electric fusion welding machine, a PE material inlet is formed in the wall surface of the hollow cylinder, and the interior of the hollow cylinder is filled with PE materials;

the connecting section is positioned in the middle, is formed by downwards extending a local arc-shaped wall on the bottom surface of the hollow cylinder and is used for connecting the hollow cylinder and the rectangular base; and

the rectangular base is positioned at the lower part, the connecting section extends downwards to form a first section, the first section is bent towards the opposite end direction of the corresponding connecting section in the hollow cylinder to form a second section, the second section is bent upwards to form a third section, the fourth section is bent towards the connecting section direction, and finally the rectangular base which is through from left to right is formed;

and after the wiring terminal and the resistance wire are occluded and fastened, the whole body of the PE electric melting pipe fitting is injected.

Optionally, two symmetrical protrusions are arranged on two sides of the first section of the rectangular base and used for injection molding positioning, and the protrusion direction of each protrusion is perpendicular to the axis of the elongated slot.

Optionally, the outer diameter of the hollow cylinder is Φ 4mm or Φ 4.7 mm.

Optionally, the width of the elongate slot is about 0.75 times the outer diameter of the resistance wire.

Optionally, the copper alloy plate has a thickness of 0.3mm to 0.8 mm.

According to another aspect of the application, a PE electric smelting pipe fitting is provided, including PE body, PE endotheca, resistance wire and binding post, wherein, the slotted hole has in the PE endotheca, is used for the holding binding post's rectangular base and rather than interference fit, the outer wall department of PE endotheca is equipped with the multichannel annular, is used for the winding to fix the resistance wire.

The utility model provides a binding post and PE electric smelting pipe fitting for PE electric smelting pipe fitting because binding post adopts the manufacturing approach that the copper alloy punching press formed, when guaranteeing the performance, has greatly saved the copper resource, and the cost is reduced and machining efficiency has been improved. This application adopts and constitutes hollow specific structure and resistance wire interlock fastening back by hollow cylinder, linkage segment and rectangular base and wholly moulds plastics into PE electric smelting pipe fitting body, adopts integrative the replacement mechanical assembly mode of moulding plastics promptly, has effectively avoided because the poor PE electric smelting pipe fitting welding failure problem that causes of contact that the interference is not enough, has improved the electrical properties of PE electric smelting pipe fitting, has greatly guaranteed the safety in utilization of PE electric smelting pipe fitting. Therefore, the electrical property of the PE electric melting pipe fitting can be improved while the cost is reduced.

The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic front view of a terminal for PE electrofusion pipe fittings according to one embodiment of the present application;

fig. 2 is a schematic left side view of the terminal shown in fig. 1;

fig. 3 is a schematic structural view at a lug of a PE electrofusion pipe fitting according to another embodiment of the present application.

The symbols in the drawings represent the following meanings:

1 PE electric melting pipe fittings, wherein the electric melting pipe fittings are arranged on the pipe fittings,

10 connecting terminals, 20 resistance wires, 30 PE inner sleeves, 31 slotted holes, 32 annular grooves, 40 PE bodies,

11 hollow cylinder, 111 PE material inlet,

12 is connected with the segment, and the segment is,

13 rectangular base, 131 first section, 132 second section, 133 third section, 134 fourth section, 135 elongated slot, 136 protrusion.

Detailed Description

Fig. 1 is a schematic front view of a terminal for PE electrofusion pipe fittings according to one embodiment of the present application. Fig. 2 is a schematic left side view of the connection terminal shown in fig. 1. Fig. 3 is a schematic structural view at a lug of a PE electrofusion pipe fitting according to another embodiment of the present application.

As shown in fig. 1 and also referring to fig. 2 to 3, the present embodiment provides a terminal 10 for a PE electrofusion pipe fitting, which is used for connecting and electrifying an external electrofusion welding machine and a resistance wire 20 (see fig. 3) embedded in a PE electrofusion pipe fitting 1 (see fig. 3). The wiring terminal 10 is formed by stamping a copper alloy plate, and the thickness of the copper alloy plate is preferably 0.3mm-0.8 mm. The connection terminal 10 includes: a hollow cylinder 11, a connecting section 12 and a rectangular base 13. The hollow cylinder 11 is located at an upper portion, and an outer diameter of the hollow cylinder 11 is a standard size for connection with an external electric fusion welding machine. The outer diameter of the hollow cylinder 11 is phi 4mm or phi 4.7 mm. The wall surface of the hollow cylinder 11 is provided with a PE material inlet 111 for the molten PE material to enter during injection molding, and the hollow cylinder 11 is filled with the PE material. The connecting section 12 is located in the middle and formed by extending a part of arc-shaped wall of the bottom surface of the hollow cylinder 11 downwards and is used for connecting the hollow cylinder 11 and the rectangular base 13. The rectangular base 13 is located at the lower part, the connecting section 12 extends downwards to form a first section 131, and bends towards the opposite end direction of the corresponding connecting section 12 in the hollow cylinder 11 to form a second section 132, then bends upwards to form a third section 133, and then bends towards the connecting section 12 to form a fourth section 134, and finally the rectangular base 13 which is through from left to right is formed. A long and thin groove 135 penetrating through the front surface and the rear surface of the third segment 133 is arranged in the third segment 133 of the rectangular base 13 in a direction parallel to the axis of the connecting terminal 10, and is used for enabling the resistance wire 20 to be embedded and form firm occlusion. After the connecting terminal 10 and the resistance wire 20 are occluded and fastened, the PE electric melting pipe fitting 1 is integrally injected into the body of the PE electric melting pipe fitting.

Referring to fig. 3, the resistance wire 20 is first wound and fixed at the ring groove 32 of the PE inner sleeve 30, then the connection terminal 10 is installed in the slot hole 31 of the PE inner sleeve 30 in an interference fit manner, and then one end of the resistance wire is embedded into the elongated groove 135 of the rectangular base 13 of the connection terminal 10 and is engaged and fastened. And then the assembled connecting terminal 10, the resistance wire and the PE inner sleeve 30 are placed into a die and processed into a complete PE electric melting pipe fitting 1 through an injection molding machine. In the PE electric melting pipe fitting 1, the hollow parts of the hollow cylinders 11 on the inner part, the outer part, the inner part, the outer part and the upper part of the rectangular base 13 of the connecting terminal 10 are all wrapped with PE materials, and the PE materials play a role in supporting, protecting and connecting and form an organic whole with the PE body 40.

This application is used for binding post 10 of PE electric smelting pipe fitting 1, because binding post 10 adopts the manufacturing approach that the copper alloy punching press formed, when guaranteeing the performance, has greatly saved the copper resource, and the cost is reduced and machining efficiency has been improved. Adopt by hollow cylinder 11, linkage segment 12 and rectangular base 13 constitute hollow specific structure and resistance wire 20 interlock fastening back whole mould plastics and go into PE body 40, this application adopts integrative the replacement mechanical assembly mode of moulding plastics, has effectively avoided the poor welding failure problem of PE electric smelting pipe fitting 1 that leads to because the interference is not enough, has improved PE electric smelting pipe fitting 1's electrical property, has greatly guaranteed PE electric smelting pipe fitting 1's safety in utilization. Therefore, the electrical performance of the PE electric melting pipe fitting 1 can be improved while the cost is reduced.

Further, as shown in fig. 1, referring to fig. 2, two symmetrical protrusions 136 are disposed on two sides of the first section 131 of the rectangular base 13 for injection positioning, and a protrusion direction of each protrusion 136 is perpendicular to an axis of the elongated slot 135.

Further, as shown in fig. 1, and also in fig. 2, the width of the elongated slot 135 is about 0.75 times the outer diameter of the resistance wire 20, so as to ensure that the connection terminal 10 is embedded in the resistance wire 20 and thus is firmly connected.

As shown in fig. 3, the present embodiment further provides a PE electrofusion pipe fitting 1, which includes a PE body 40, a PE inner sleeve 30, a resistance wire 20, and the connection terminal 10 in the above embodiments. The PE inner sleeve 30 is provided with a slotted hole 31 for accommodating the rectangular base 13 of the wiring terminal 10 and in interference fit with the rectangular base 13, and the outer wall of the PE inner sleeve 30 is provided with a plurality of annular grooves 32 for winding and fixing the resistance wire 20.

The PE electrofusion tube member 1 of the present application includes the terminal 10 in the above-described embodiment, and therefore also has all of its advantages. In the application, because the wiring terminal 10 adopts a manufacturing mode formed by stamping copper alloy, the copper resource is greatly saved while the performance is ensured, the cost is reduced, and the processing efficiency is improved. Adopt by hollow cylinder 11, linkage segment 12 and rectangular base 13 constitute hollow specific structure and resistance wire 20 interlock fastening back whole mould plastics and go into PE body 40, this application adopts integrative the replacement mechanical assembly mode of moulding plastics, has effectively avoided the poor welding failure problem of PE electric smelting pipe fitting 1 that leads to because the interference is not enough, has improved PE electric smelting pipe fitting 1's electrical property, has greatly guaranteed PE electric smelting pipe fitting 1's safety in utilization. Therefore, the electrical performance of the PE electric melting pipe fitting 1 can be improved while the cost is reduced. Therefore, the electrical performance of the PE electric melting pipe fitting 1 can be improved while the cost is reduced.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a binding post for PE electric smelting pipe fitting for connect the circular telegram with the embedded resistance wire of PE electric smelting pipe fitting with outside electric fusion welding machine, its characterized in that, binding post (10) adopt the punching press of copper alloy board to form, binding post (10) include:

the hollow cylinder (11) is positioned at the upper part, the outer diameter of the hollow cylinder (11) is of a standard size and is used for being connected with an external electric fusion welding machine, a PE material inlet (111) is formed in the wall surface of the hollow cylinder (11), and the interior of the hollow cylinder (11) is filled with PE materials;

the connecting section (12) is positioned in the middle, is formed by downwards extending a local arc-shaped wall of the bottom surface of the hollow cylinder (11), and is used for connecting the hollow cylinder (11) and the rectangular base (13); and

the rectangular base (13) is positioned at the lower part, the connecting section (12) extends downwards to form a first section (131), the first section is bent towards the opposite end direction of the corresponding connecting section (12) in the hollow cylinder to form a second section (132), the second section is bent upwards to form a third section (133), the fourth section is bent towards the connecting section (12) to form a fourth section (134), and finally the rectangular base (13) which is through from left to right is formed;

and after the wiring terminal (10) and the resistance wire are occluded and fastened, the whole body is injected into the body of the PE electric melting pipe fitting.

2. A terminal according to claim 1, wherein the rectangular base (13) has two symmetrical protrusions (136) on both sides of the first section (131) for injection molding positioning, and the protrusion direction of each protrusion (136) is perpendicular to the axis of the elongated slot (135).

3. A terminal according to claim 1, wherein the outer diameter of the hollow cylinder is Φ 4mm or Φ 4.7 mm.

4. A terminal according to claim 1, wherein the width of the elongate slot (135) is about 0.75 times the outer diameter of the resistance wire.

5. A terminal according to any one of claims 1 to 4, wherein the copper alloy plate has a thickness of 0.3mm to 0.8 mm.

6. A PE electric melting pipe fitting is characterized by comprising a PE body (40), a PE inner sleeve (30), a resistance wire (20) and the connecting terminal (10) according to any one of claims 1 to 5, wherein a slotted hole (31) is formed in the PE inner sleeve (30) and used for accommodating the rectangular base (13) of the connecting terminal (10) and in interference fit with the rectangular base, and a plurality of annular grooves (32) are formed in the outer wall of the PE inner sleeve (30) and used for winding and fixing the resistance wire (20).