Assembly welding tool device and method commonly used for large curved surface end sockets of pressure containers

A pressure vessel and curved surface technology, applied in the field of pressure vessel head manufacturing, can solve the problems of difficulty in ensuring the dimensional accuracy of the head, affecting the aesthetics of the surface of the head, and increasing the labor intensity of workers, so as to ensure accuracy, facilitate positioning and adjustment. , The effect of preventing welding deformation

Active Publication Date: 2014-06-18
哈尔滨市黎明锅炉容器封头有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only causes a serious waste of materials, but also increases the labor intensity of workers. In addition, it is difficult to ensure the dimensional accuracy of the head by welding the ring, and it also affects the aesthetics of the head surface after cutting.

Method used

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  • Assembly welding tool device and method commonly used for large curved surface end sockets of pressure containers
  • Assembly welding tool device and method commonly used for large curved surface end sockets of pressure containers
  • Assembly welding tool device and method commonly used for large curved surface end sockets of pressure containers

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Experimental program
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Effect test

Embodiment 1

[0042] At first this inventive device is used for the manufacture of hemispherical head, and when using, the inventive device is placed in the workshop, and is used for the manufacture of the head on the deasphalting tower of 400,000 tons / year catalytic oil slurry supercritical extraction unit, this The thickness of the upper head is δ=42min, and the hemispherical head with a radius R=2000mm is made of Q345R. Since the Q345R material tends to be hardened in the heat-affected zone during welding, it is easy to form a quenched structure—martensite, which makes it nearly The hardness of the seam area increases and the plasticity decreases, which will easily lead to cracks after welding. Therefore, ensuring a reasonable tooling and welding process is the key to welding manufacturing. When manufacturing the head, first place eight curved heads on the device one by one, and then place them on the device. Put the balls on the top of all melon petals and assemble them, rotate the manua...

Embodiment 2

[0044] The semi-ellipsoidal head is an important part of the deasphalting tower of the 400,000 tons / year catalytic oil slurry supercritical extraction device. Compared with the hemispherical head, the welding curve is more complicated when the ellipsoidal head is manufactured, so the deformation is more serious. The patented device of the present invention is placed in the working workshop. The lower head of the deasphalting tower is manufactured. The thickness of the lower head is δ=42 (38) mm, and the semi-ellipsoidal head with radius R=2000mm. The material used is Q345R , because Q345R material welding is prone to hardening tendency in heat-affected zone, it is easy to form quenched structure-martensite, which increases the hardness of the near-seam area and reduces the plasticity, which is easy to cause cracks after welding. Therefore, it is necessary to ensure reasonable tooling and welding process The key to welding the lower head is to manufacture the head by first placi...

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Abstract

The invention relates to an assembly welding tool device and method commonly used for large curved surface end sockets of pressure containers. The assembly welding tool device comprises a supporting base plate, a ball screw, grouped rolling bearings, a movement air cylinder, external locating blocks, internal locating blocks, a manual rocker and a graduated scale, wherein the ball screw and an executive component drive most of the external locating blocks and most of the internal locating blocks to move along guide rails of the supporting base plate so as to carry out integrated locating clamping fixation on the curved surface end sockets. According to the assembly welding tool device and method commonly used for the large curved surface end sockets of the pressure containers, in the manufacturing process of the pressure containers, tool locating of the large end sockets can be achieved, welding deformation is prevented, the curved surface end sockets are placed on the assembly welding tool device to be clamped in an assembly locating mode, spot fixation is carried out on weld joints, and then welding operation is carried out on the internal weld joints and the external weld joints; after welding is accomplished, the curved surface end sockets are naturally cooled to have the normal temperature, postwelding is carried out on the curved surface end sockets, stress relieving is carried out on the curved surface end sockets, labor intensity of workers is reduced, the production and manufacturing cycle of products is shortened, and the production cost is reduced.

Description

technical field [0001] The patent of the present invention relates to the technical field of pressure vessel head manufacturing, in particular to a large-scale head welded by blocks such as melon petals. The head can effectively solve the radial deformation caused by the welding of the thin plate and thick plate melon petal head, which will seriously affect the out-of-roundness dimension deviation of the welded head. Background technique [0002] In the manufacture of large pressure vessels, the manufacture of the head is limited by the material and pressing equipment, and it is difficult to form it as a whole. A feasible method is to combine multiple melon petals or a larger spherical segment and multiple arc-shaped petals by welding. The melon petals and balls are formed by cold stamping first, then the grooves are prefabricated, and finally assembled and welded on the welding carcass. Due to the large size of the head, it is difficult to control the welding deformation,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K37/04B23K31/02C21D1/30C21D9/50
CPCB23K31/02B23K37/0426C21D1/30C21D9/50
Inventor 李晓泉闫业良申赛刚邹华
Owner 哈尔滨市黎明锅炉容器封头有限公司
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