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Forming device for seamless outer protective tube for high-density polyethylene prefabricated directly-buried elbow and forming technology thereof

A high-density polyethylene, prefabricated direct-buried technology, applied in the field of outer protection pipe bending processing, can solve the problems of short service life and low structural strength, and achieve the effect of long service life and high overall structural strength

Pending Publication Date: 2018-01-12
HEBEI HAOTIAN THERMOELECTRICITY EQUIP GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a high-density polyethylene prefabricated direct-buried elbow seamless outer protective tube forming device and its forming process to solve the problems of low strength and service life of the outer protective tube elbow heat-melt welding structure existing in the prior art short question

Method used

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  • Forming device for seamless outer protective tube for high-density polyethylene prefabricated directly-buried elbow and forming technology thereof
  • Forming device for seamless outer protective tube for high-density polyethylene prefabricated directly-buried elbow and forming technology thereof
  • Forming device for seamless outer protective tube for high-density polyethylene prefabricated directly-buried elbow and forming technology thereof

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Embodiment Construction

[0021] Such as figure 1 , figure 2 , image 3 with Figure 4 As shown, a high-density polyethylene prefabricated direct-buried elbow seamless outer protective tube forming device consists of an elbow pushing machine 1, a controller 2, several heating plates, a cooling air pipe 7, a polytetrafluoro plate tube 8, Track 9, electric stretch bending machine 10 and pipe bending fixture 11, heating sheet includes preheating heating sheet 3, pipe top heating sheet 4, inner arc heating sheet 5 and outer arc heating sheet 6, polytetrafluoro plate tube 8 is arranged on At the outlet end of the bent pipe pushing machine 1, the cooling air pipe 7 is installed on the outside of the PTFE plate tube 8, and the inner side of the annular body 71 of the cooling air pipe 7 is provided with a number of air holes 72, and the track 9 is arranged on the outlet side of the bent pipe pushing machine 1. Electric stretch bending machine 10 is made up of rail car 101, reduction motor 102, pinion disc ...

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Abstract

The invention discloses a forming device for a seamless outer protective tube for a high-density polyethylene prefabricated directly-buried elbow and a forming technology thereof. The forming device is composed of an elbow pushing machine, a controller, a plurality of heating sheets, a cooling air tube, a polytetrafluoroethylene plate tube, a rail, an electric bending machine and an elbow clamp, and preheating sheets, a tube top heating sheet, inner arc heating sheets and outer arc heating sheets are connected to a preheating region, a tube top heating region, an inner arc heating region and an outer arc heating region of a tube body respectively; the cooling air tube is arranged on the outer side of the polytetrafluoroethylene plate tube, and a plurality of air holes are formed in the inner side of the annular pipe body of the cooling air pipe; and the electric bending machine is composed of a rail car, a gear motor, a small gear disc, a large gear disc, a rotating shaft and a clamping sleeve, and the elbow clamp is arranged on the clamping sleeve. One-time stewing and traction forming can be carried out on a straight tube of the outer protective tube, eno weld joint exists on thesurface of an elbow product, the overall structural strength is high, the service life is long, and the device is suitable for being used for machining the elbows of the outer protective tube elbowswith various tube diameters.

Description

technical field [0001] The invention relates to the technical field of outer protective pipe bend processing, in particular to a seamless outer protective pipe forming device for high-density polyethylene prefabricated direct-buried elbows and a forming process thereof. Background technique [0002] The outer protective tube is widely used in thermal pipelines, and has the characteristics of high mechanical strength, impact resistance, environmental stress cracking resistance, corrosion resistance, low temperature resistance, easy welding, simple construction, strict sealing without leakage, and long service life. The processing of PE outer protective pipe bends has always been a key research topic in the industry. The current PE outer protective pipe bends are all processed by hot-melt welding. There are welds on the surface of the welded PE outer protective bends, and the overall structural strength How to realize the integral forming of PE outer protective pipe elbow has ...

Claims

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Application Information

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IPC IPC(8): B29C53/08B29C53/84B29K23/00
Inventor 郑中胜韩荆建张国玉朱景通高义杨苏同猛仉松青
Owner HEBEI HAOTIAN THERMOELECTRICITY EQUIP GRP CO LTD
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