CN209026376U - A kind of heat-proof polythene electric melting pipe fittings - Google Patents

Abstract

The utility model provides a kind of heat-proof polythene electric melting pipe fittings, it include: main pipe body, the resistance wire for being wrapped in the main pipe body inner surface, the binding post being fixed in the electrode hole that the main pipe body opens up, the binding post is hollow tubular structure, the resistance wire is contained in the binding post, and the electrode hole inner wall is by squeezing the fixed resistance wire of the binding post.The heat-proof polythene electric melting pipe fittings are prevented from causing the pipe fitting welding loosely because connecting loosening or can not be welded by binding post and the embedded connection of resistance wire, therefore, the beneficial effect which has the connection of resistance wire and binding post more reliable.

Description

A kind of heat-proof polythene electric melting pipe fittings

Technical field

The utility model relates to pipeline field, especially a kind of heat-proof polythene electric melting pipe fittings.

Background technique

Polyethylene (PE) electric melting pipe fittings and all existing more mature design of polypropylene (PP-R) electric melting pipe fittings at present.More than Two kinds of electric melting pipe fittings are the design production that pipe fitting is completed by using following manner: the internal diameter of idiosome passes through lathe process and pipe Material outer diameter matches, and is provided with groove on electric melting pipe fittings idiosome inner wall, resistance wire is pressed into groove by lathe, electric melting pipe fittings two Head offers electrode hole, and resistance wire is connected after passing through electrode hole by copper electrode tip compression；Wherein it is furnished with the pipe fitting area of resistance wire Domain is welding area, is cooling zone outside the welding area；Polyethylene (PE) electric melting pipe fittings and polypropylene (PP-R) electric melting pipe fittings There is respective heating design scheme, heat-proof polythene (PE-RT) electric melting pipe fittings indiscriminately imitate PE electric melting pipe fittings or PP-R when designing The design parameter of electric melting pipe fittings, the PE-RT electric melting pipe fittings quality stability produced is poor, will cause material spray (including electricity Pole hole material spray) or the problems such as not prison welding, there are some potential safety problemss.

Referring to Figure 1,2, notification number discloses electric melting pipe fittings for the Chinese utility model patent of CN203836469U and includes If a hollow main pipe body 1, several terminals 2 in the main pipe body 1, several binding posts 3 in terminals 2, Dry resistance wire 4, binding post 3 include the extension end 31 being connected with each other and an installation end 32, and resistance wire 4 is pierced by terminals 2, then will Binding post 3, which is pressed into terminals 2, connects 32 surface of installation end and 4 surface of resistance wire, and the top loop of installation end 32 is equipped with Several anti-pull-off protrusions 34, and the angle of the lower surface of each anti-pull-off protrusion 34 and the outer surface of installation end 32 is obtuse angle, peace It fills and is equipped with a positive stop lug boss 35 between end 32 and extension end 31.The lower surface of each anti-pull-off protrusion 34 and the outer surface of installation end 32 Angle be obtuse angle, convenient for the installation of binding post 3.A positive stop lug boss 35 is equipped between installation end 32 and extension end 31, for preventing Only it is excessive to be inserted into main pipe body 1 for binding post 3, and for preventing the welder interface connecting with electric melting pipe fittings insertion binding post excessive. The distance of the center of through-hole 33 to the bottom of installation end 32 is 5mm.

A clear opening is equipped in each terminals 2, the diameter of installation end 32 is equal to the diameter of the clear opening, and binding post 3 blocks Tightly in the clear opening.That is, binding post 3 and the clear opening are interference fits.The protrusion of anti-pull-off protrusion 34 Height is 1mm.Since main pipe body 1 is polyethylene (PE) material, binding post 3 is metal material, therefore anti-pull-off protrusion 34 cannot be too high, is otherwise difficult to fill in the clear opening, can not be too short, and otherwise cannot play prevents binding post 3 by need not That wants pulls up the effect to fall off.The height of projection of positive stop lug boss 35 is 1.5mm.So to be better protected from binding post 3 in institute It states and is inserted through head in clear opening.

Electric melting pipe fittings often having in the transportational process that produces and construct contacts loosening or wiring between resistance wire and binding post Column connect with main pipe body loosening the problem of occur, thus make electric melting pipe fittings electrical performance even fail, lead to pipe fitting welding The problem of loosely or can not welding generation, seriously affects the welding quality of pipe-line system, and in pipe fitting welding, material spray is easy to take out of Binding post.

Utility model content

In order to overcome the above problem, more reliable heat-proof polythene electricity is connected the purpose of this utility model is to provide a kind of Fusion tube part.

In order to achieve the above-mentioned advantages, the utility model provides heat-proof polythene electric melting pipe fittings, including main pipe body, it is wrapped in the pipe The resistance wire of part body inner surface, the binding post being fixed in the electrode hole that the main pipe body opens up, the binding post are hollow Tubular structure, the resistance wire is contained in the binding post, and the electrode hole inner wall is fixed by squeezing the binding post The resistance wire.

In one embodiment of the utility model, stop collar, the stop collar and the pipe fitting are equipped in the middle part of the binding post Body outer surface fitting.

In one embodiment of the utility model, the main pipe body outer surface is equipped with the shield being set in outside the binding post Pipe.

In one embodiment of the utility model, the binding post, which offers, a plurality of extends to binding post from binding post lower end The deformation joint at middle part.

In one embodiment of the utility model, the binding post lower outer diameter is greater than the outer diameter in the middle part of the binding post, There is transition shoulder, the transition shoulder is for being engaged in the electrode hole middle part between in the middle part of the binding post lower part and the binding post Wall.

In one embodiment of the utility model, the binding post lower end is equipped with the gradually smaller insertion guidance in section Face.

In one embodiment of the utility model, the main pipe body is equipped with peep hole.

In one embodiment of the utility model, the binding post is made of copper.

In one embodiment of the utility model, the quantity of the electrode hole is a pair.

In one embodiment of the utility model, a pair of electrode hole is located at the one or both ends of the main pipe body.

In the utility model, the heat-proof polythene electric melting pipe fittings by binding post and the embedded connection of resistance wire, prevent because Connection loosens and causes the pipe fitting welding loosely or can not weld, and therefore, which has the company of resistance wire and binding post Connect more reliable beneficial effect.

Detailed description of the invention

Fig. 1 show the structural schematic diagram of the electric melting pipe fittings of the prior art.

Fig. 2 show the structural schematic diagram of the binding post of Fig. 1.

Fig. 3 show the structural schematic diagram of the heat-proof polythene electric melting pipe fittings of the utility model first embodiment.

Fig. 4 show the partial enlarged view at the heat-proof polythene electric melting pipe fittings A of Fig. 3.

Fig. 5 show the exploded enlarged drawing at the heat-proof polythene electric melting pipe fittings A of Fig. 3.

Fig. 6 show the structural schematic diagram of the binding post of the heat-proof polythene electric melting pipe fittings of Fig. 3.

Specific embodiment

Further to illustrate that the utility model is the technical means and efficacy reaching predetermined purpose of utility model and being taken, Below in conjunction with attached drawing and preferred embodiment, to according to the utility model proposes specific embodiment, structure, feature and its effect, Detailed description is as follows.

Fig. 3 is referred to, the heat-proof polythene electric melting pipe fittings of the first embodiment of the utility model include: main pipe body 1, twine The binding post 3 for being wound on the resistance wire 2 of 1 inner surface of main pipe body, being fixed in the electrode hole 11 that the main pipe body 1 opens up.

Fig. 4, Fig. 5 are referred to, 1 outer surface of main pipe body is equipped with the pillar 12 being set in outside binding post 3.Pillar 12 is for protecting Shield binding post 3 connects the plug of welding machine simultaneously.Main pipe body 1 is equipped with peep hole 13.Whether peep hole 13 is complete for observing welding At and welding after the completion of welding quality.Main pipe body 1 has the one or more interfaces 14 connecting with tubing electric smelting.Pipe fitting The densely arranged region of the resistance wire 2 of 1 inner surface of main body is welding area 15.

Fig. 6 is referred to, binding post 3 is hollow tubular structure, and resistance wire 2 is contained in binding post 3,11 inner wall of electrode hole By squeezing 3 fixed resistance silk 2 of binding post.The quantity of electrode hole 11 is a pair.A pair of electrodes hole 11 is located at the one of main pipe body 1 End or both ends.

Stop collar 31 is equipped in the middle part of binding post 3, which is bonded with 1 outer surface of main pipe body.Binding post 3 offers The a plurality of deformation joint 32 that 3 middle part of binding post is extended to from 3 lower end of binding post.Deformation joint 32 is for making binding post 3 in electrode hole 11 Extruding under deform and with the embedded connection of resistance wire 2.When the connection type can prevent electrode hole 11 to be heated soften so as to cause Binding post 3 falls off.Binding post 3 is made of copper.

3 lower outer diameter of binding post is greater than the outer diameter at 3 middle part of binding post, and 3 lower part of binding post and binding post have between 3 middle part Transition shoulder 33, the transition shoulder 33 is for being engaged 11 middle part inner wall of electrode hole.

3 lower end of binding post is equipped with the gradually smaller insertion guide surface 34 in section.Guide surface 34 is cambered surface, guide surface 34 For facilitating binding post 3 to connect with pillar 12.

The construction process of the electric melting pipe fittings are as follows:

1, it measures and is marked on tubing with marking pen the depth for being inserted into the main pipe body 1 or welding area 15 and pay attention to tubing End face is sectioned perpendicular to axis.

2, before welding that the oxide layer of tubing welding area is fully erased.

3, tubing and the welding surface of the main pipe body 1 must be clean, dry.

4, interface 1 is inserted at tubing welding end and is contained in the welding area 15 of main pipe body 1, the main pipe body 1 is necessary It is connect under stress-free conditions with tubing.

5, it will be electrically connected in the pillar 12 of the plug access main pipe body 1 of welding machine and with binding post 3, accurately input the electric smelting The weld time demarcated on pipe fitting and cooling time.

6, after preparation is ready, welding machine can show welding parameter, after fully validated, then start welding machine and start welding, melt Welding machine can prompt welding procedure to terminate after connecing, and judge whether welding is completed finally by peep hole 13.

After the defined time is cooling, this welding quality is judged by peep hole 13.

In the utility model, which is prevented by binding post 3 and the embedded connection of resistance wire 2 It is loosened because connecting and causes the pipe fitting welding loosely or can not weld.

In the utility model, which crosses 11 middle part of step 33 and electrode hole by binding post 3 The occlusion of inner wall, electrode hole 11 is caused binding post 3 to fall off by thermal softening when preventing from heating.

Therefore, the beneficial effect which has the connection of resistance wire 2 and binding post 3 more reliable Fruit.

More than, it is only the preferred embodiment of the utility model, limit in any form not is made to the utility model System, although the utility model has been disclosed with preferred embodiment as above, is not intended to limit the utility model, any to be familiar with sheet Technical professional is not departing within the scope of technical solutions of the utility model, when the technology contents work using the disclosure above A little change or it is modified to the equivalent embodiment of equivalent variations out, but all without departing from the content of the technical scheme of the utility model, according to According to the technical essence of the utility model any simple modification, equivalent variations and modification to the above embodiments, still fall within In the range of technical solutions of the utility model.

Claims (10)

1. a kind of heat-proof polythene electric melting pipe fittings, including main pipe body, the resistance wire for being wrapped in the main pipe body inner surface, fixation Binding post in the electrode hole that the main pipe body opens up, which is characterized in that the binding post is hollow tubular structure, described Resistance wire is contained in the binding post, and the electrode hole inner wall is by squeezing the fixed resistance wire of the binding post.

2. heat-proof polythene electric melting pipe fittings according to claim 1, which is characterized in that be equipped with limit in the middle part of the binding post Ring, the stop collar are bonded with the main pipe body outer surface.

3. heat-proof polythene electric melting pipe fittings according to claim 2, which is characterized in that the main pipe body outer surface is equipped with The pillar being set in outside the binding post.

4. heat-proof polythene electric melting pipe fittings according to claim 3, which is characterized in that the binding post offer it is a plurality of from Binding post lower end extends to the deformation joint in the middle part of binding post.

5. heat-proof polythene electric melting pipe fittings according to claim 4, which is characterized in that the binding post lower outer diameter is greater than There is transition shoulder, which uses between in the middle part of outer diameter in the middle part of the binding post, the binding post lower part and the binding post The inner wall in the middle part of the occlusion electrode hole.

6. heat-proof polythene electric melting pipe fittings according to claim 5, which is characterized in that the binding post lower end is equipped with The gradually smaller insertion guide surface in section.

7. heat-proof polythene electric melting pipe fittings according to claim 1, which is characterized in that the main pipe body is equipped with observation Hole.

8. heat-proof polythene electric melting pipe fittings according to claim 1, which is characterized in that the binding post is made of copper.

9. heat-proof polythene electric melting pipe fittings described in any one of -8 according to claim 1, which is characterized in that the electrode hole Quantity be a pair.

10. heat-proof polythene electric melting pipe fittings according to claim 9, which is characterized in that a pair of electrode hole is located at institute State the one or both ends of main pipe body.