Method and equipment for underwater welding of sacrificial anode based on friction stud welding

A friction stud welding, sacrificial anode technology, applied in welding equipment, non-electric welding equipment, metal processing equipment and other directions, can solve the problems of moving to shore or under waterless conditions, and difficult underwater welding methods, and achieve good quality, Quick separation and less damage

CN104308355AInactive Publication Date: 2015-01-28BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
4 Cites 7 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-01-28
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method and equipment for underwater welding of a sacrificial anode based on friction stud welding, which are mainly used for replacement and maintenance of submarine pipelines and underwater structures of ocean engineering. The underwater welding of the sacrificial anode based on friction stud welding can be completed by a submariner or an ROV (remote operated vehicle). The friction welding is the fixed-phase welding type, and the influence on the welding process by the environment pressure is relatively small. In addition, when a deeper water area cannot be reached by the common submarine method, the welding at the water area with depth of several hundreds of meters to several thousands of meters can be performed by the ROV. The method has the advantages that the operation cost is relatively lower, the operation is simple, and a welding joint with high quality can be obtained.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to an underwater welding method, in particular to a sacrificial anode underwater welding method and equipment based on friction stud welding. Background technique

[0002] With the development of my country's offshore oil industry, some offshore pipelines and underwater structures have a longer service life, and the sacrificial anodes installed on them need to be replaced or installed, because the pipelines or structures cannot be moved to the shore or in anhydrous conditions Welding is carried out underwater, and with the increase of the water depth of underwater structures in my country, there are certain difficulties in ordinary underwater welding methods. Therefore, this patent proposes a sacrificial anode underwater welding method and equipment based on friction stud welding, mainly for offshore oil Replacement and maintenance of sacrificial anodes of submarine pipelines and underwater structures in industry. The device can be...

Examples

Embodiment Construction

[0018] The present invention is based on the underwater welding method of the sacrificial anode of friction stud welding, adopts friction heat generation mode to weld the workpiece to be welded underwater, and adopts the mode of friction stud welding to directly sacrifice the underwater structure in the water environment The anode assembly is welded, and the method includes the following steps:

[0019] Step 1, positioning and installing the sacrificial anode assembly on the welding equipment on land or on the ship deck;

[0020] Step 2, using lifting equipment to lower and fix the anode assembly and welding equipment on the underwater structure to be welded;

[0021] Step 3, welding the anode assembly;

[0022] Step four, release the anode assembly and recover the welding equipment.

[0023] like figure 2 As shown, the sacrificial anode underwater welding equipment based on friction stud welding of the present invention mainly consists of a positioning locking magnet 1, a...