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Preheating and after-heating device for welding

A heating device and heating tube technology, applied in auxiliary devices, welding equipment, auxiliary welding equipment, etc., can solve problems such as inconvenient operation, and achieve the effects of convenient heating length, energy saving, and uniform flame

Inactive Publication Date: 2019-02-15
ANHUI SPECIAL EQUIP INSPECTION INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of inconvenient operation of the existing welding preheating and post-heating devices, the present invention provides a welding pre-heating and post-heating device

Method used

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  • Preheating and after-heating device for welding
  • Preheating and after-heating device for welding
  • Preheating and after-heating device for welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a heating device after welding preheating includes a gas source tank 1, the combustion gas in the gas source tank 1 can be combustible gases such as liquefied petroleum gas, propane or ethane, and the output end of the gas source tank 1 is connected with a foldable Bend the heating tube 8, the material of the bendable heating tube 8 can be iron, steel, etc., in order to facilitate the operator to bend the bendable heating tube 8, the bendable heating tube 8 of this embodiment adopts a stainless steel hose, On the one hand, the stainless steel hose is easier to deform, and is more resistant to bending and high temperature; through the bendable heating tube 8, the operator can adjust the bending rate of the heating tube according to the curvature of the base material 9 to be welded, which has higher versatility.

[0034] The bendable heating tube 8 of this embodiment is provided with a number of air outlet holes 6 uniformly distributed in the ho...

Embodiment 2

[0036] Such as figure 1 As shown, a welding preheating and afterheating device of this embodiment includes a gas source tank 1 and a buffer tank 2 connected by a pressure tube 3, and a bendable heating tube 8 is connected to the output end of the buffer tank 2, which can be A number of air outlet holes 6 uniformly distributed in the transverse direction are opened on the bent heating tube 8 , and a control valve 7 is arranged on the air outlet holes 6 , and the end of the bendable heating tube 8 away from the gas source tank 1 is closed.

[0037] It should be noted that, in other embodiments, multiple gas source tanks 1 can be provided, and multiple gas source tanks 1 are connected to one buffer tank 2, and can be opened together to supply gas to the buffer tank 2 and the bendable heating tube 8 , it should be noted that it is sufficient to adjust the air pressure of each air source tank 1 to ensure that it is within the pressure range of the buffer tank 2 . It is also possib...

Embodiment 3

[0042] A kind of welding preheating post-heating device of this embodiment, in order to facilitate the portability of the whole device and facilitate operators to carry out high-altitude operations, the welding pre-heating post-heating device includes a 35.5L liquefied petroleum gas tank connected by a pressure-bearing pipe 3 and 4.7L buffer tank 2, if it is the welding of large-scale equipment on the ground, a larger size gas source tank 1 and buffer tank 2 can be used. The output end of the buffer tank 2 is connected to the bendable heating tube 8, and the bendable heating tube 8 There are 7 to 10 air outlets 6 on the top, except for the first 3 or 4 air outlets 6 close to the air source tank 1, the other air outlets 6 are connected to the control valve 7, and the bendable heating tube 8 is far away from the air source. Tank 1 is closed at one end. Not all of the air outlets 6 in this embodiment are provided with control valves 7, because preheating starts before welding, an...

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Abstract

The invention discloses a preheating and after-heating device for welding, and belongs to the field of welding equipment. The preheating and after-heating device for welding comprises a gas source tank, a bendable heating pipe is connected to the gas source tank, a plurality of gas outlet holes which are transversely and evenly distributed are formed in the bendable heating pipe, a control valve is arranged on each gas outlet hole, and the end, far away from the gas source tank, of the bendable heating pipe is closed. According to the preheating and after-heating device for welding, the bending curvature of the bendable heating pipe can be adjusted according to the curvature of to-be-welded base metal, and the universality is higher; the control valves are arranged at the gas outlet holes,therefore, opening and closing of the gas outlet holes can be controlled by the control valves, the control valves are sequentially opened along with increasing of the welding seam length, the heating length can be conveniently controlled, and meanwhile energy sources can be better saved; and in addition, a buffer tank is connected between the gas source tank and the bendable heating pipe, gas inthe buffer tank can be used for achieving supplementing when burning gas in the gas source tank is about to be used up, gas sources can be supplemented to the gas source tank in time, the working efficiency is significantly improved, and a flame is more stable and more uniform, so that the preheating effect is better.

Description

technical field [0001] The invention belongs to the field of welding equipment, and in particular relates to a welding preheating and postheating device. Background technique [0002] When the base metal to be welded exceeds a certain thickness, in order to ensure the welding quality and prevent defects such as cracks and incomplete penetration in the weld, it is usually necessary to preheat and post-heat treat the base metal during the welding process. Heat and post-heat treatment equipment and methods have always been a difficult problem for engineers and technicians. [0003] In the existing preheating and post-heating process, the local heating method of electric heaters is usually used for pre-weld preheating and post-weld heat treatment in the welding process. In this heating method, a strip heater is wrapped on the steel plate to be welded , to cover the weld seam, and during the preheating process, more water vapor will be generated, which is difficult to remove in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K37/00
CPCB23K37/00
Inventor 洪勇史红兵王恩和胡孔友杨明王建明王仁涛
Owner ANHUI SPECIAL EQUIP INSPECTION INST
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