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Tubular electric heater

An electric heater and tubular technology, which is applied in the field of tubular electric heaters, can solve problems such as inability to produce, and achieve the effects of fast heating, stable thermal curing quality, and simple structure

Active Publication Date: 2013-07-24
泰州华东绝缘材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the shortage that the heating device matched with the existing pultrusion equipment cannot produce specifications above φ130mm, and proposes a tubular electric heater with simple structure, easy matching, low energy consumption, quick, uniform and reliable heating

Method used

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  • Tubular electric heater
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Effect test

Embodiment 1

[0016] figure 1 The tubular electric heater shown is used in the production of epoxy-based pultruded mandrels, and it includes a tube body 1 , a tube joint 2 , a sheath tube 3 , a heating tube 4 and a sensor 5 . The pipe body 1 is the main component of the present invention. The component is in the shape of a thick-walled circular tube, and its outer wall is composed of a truncated cone and a cylinder. One end of the body is threaded with the pipe joint to form a positioning installation. The cross-section of the pipe body 1 is provided with an axial through hole 1.1 in the center. The non-alkali glass fiber and a part of the prepared glue enter the mold cavity through the axial through hole 1.1, and the other part of the glue enters the mold cavity along the outer wall of the pipe body 1. In order to ensure that the rubber material and alkali-free glass fiber enter the mold cavity after isothermal heating, the present invention embeds heating tubes 4 at equal intervals and c...

Embodiment 2

[0018] This embodiment is used for the production of epoxy-based pultrusion mandrels with a diameter of φ250mm. Because the product specification is larger than that of embodiment 1, the consumption of rubber and alkali-free glass fiber is more, although the structure of the tubular electric heater used is the same as that of the embodiment 1, but the main technical parameters have been adjusted. For example, the diameter of the axial through hole 1.1 built in the tube body 1 is increased to φ50 mm, the taper of the truncated cone is 1:4, and the tube body 1 is embedded with eight 1500w heating tubes 4. The tubular electric heater under this configuration is the same as The application effect of embodiment 1 is similar, and the energy consumption is only 1 / 30 of the prior art, so the application of the present invention has good economic and social benefits.

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Abstract

The invention discloses a tubular electric heater which comprises a pipe body, a pipe connector, protective sleeves, heating pipes and sensors. The outer wall of the pipe body is composed of a truncated cone and a cylinder. A small end face of the truncated cone is towards a fiber guiding-in opening. One end of the cylinder is in threaded connection with the pipe connector to form locating mounting. An axial through hole is formed in the middle of the cross section of the pipe body. 4-8 heating pipes are embedded around the axial through hole coaxially at equal distance in the wall of a pipe. Free ends of the heating pipes are placed at one cylindrical end of the pipe body and are provided with the protective sleeves. One sensor is embedded coaxially on the pipe wall between any two adjacent heating pipes. The tubular electric heater is simple in structure, low in energy consumption and quick and even in heating, temperature difference of rubber materials guided into a mould cavity and alkali-free glass fibers does not exist, and an inner layer and an outer layer can be solidified synchronously. The tubular electric heater is very suitable for production of epoxy group pultrusion mandrils from phi 160 m to phi 250 m.

Description

technical field [0001] The invention relates to a heater, especially a tubular electric heater, which is used for heating rubber and non-alkali glass fiber for producing epoxy-based pultrusion mandrels. Background technique [0002] Epoxy-based pultrusion mandrel is a kind of composite insulating material. In addition to excellent insulating properties, this material also has the characteristics of high strength, heat resistance, cold resistance, mildew resistance, moisture resistance, and impact resistance. It is widely used in power devices. Applications. With the development of the power industry and the continuous improvement of the grid voltage level, higher requirements are put forward for the quality index of the supporting epoxy-based pultrusion mandrel, and the specifications demanded in the market are also increasing. Epoxy-based pultruded rods are made of epoxy resin, alkali-free fibers, catalysts and other raw materials. During production, the compounded rubber ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/48
Inventor 黄剑锋夏友军夏友民葛广满
Owner 泰州华东绝缘材料有限公司
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