CN-122015090-A - Underwater oxyacetylene flame preheating integrated welding gun device

CN122015090ACN 122015090 ACN122015090 ACN 122015090ACN-122015090-A

Abstract

The invention relates to the technical field of underwater welding, and provides an underwater oxy-acetylene flame preheating integrated welding gun device which solves the technical problems that an existing preheating device of underwater welding equipment is difficult to effectively preheat, has complex operation and poor simplicity in the using process and poor using flexibility. The invention can ensure the quality, the welding efficiency and the stability of the welding seam, is suitable for various underwater operation environments, and can provide reliable welding performance in deep sea, high-pressure water areas and special underwater maintenance environments.

Inventors

GUO NING
Bi Shifan
ZHANG XIN
ZHANG CHUANG
ZHANG ZIHANG
LUO WENXUE
HUANG HAO
Chen haotian
FU YUNLONG

Assignees

青岛哈尔滨工业大学(威海)研究院

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (7)

1. The underwater oxyacetylene flame preheating integrated welding gun device is characterized by comprising a shell, an end cover, a wire feeding welding gun and an oxyacetylene flame gun, wherein the end cover is connected with the lower end of the shell, the wire feeding welding gun and the oxyacetylene flame gun are respectively connected with the shell, and the wire feeding welding gun and the oxyacetylene flame gun are arranged in parallel; The wire feeding welding gun comprises a wire feeding channel and a gun head, wherein the gun head is connected with the wire feeding channel, the end part of the gun head is provided with a wire guide nozzle, the lower part of the wire feeding channel penetrates through the end cover, and a sealing piece is arranged at the joint of the lower part of the wire feeding channel and the end cover; The oxygen acetylene flame gun comprises an oxygen gas pipe, an acetylene gas pipe, an oxygen gun pipe, an acetylene gun pipe, a sealing joint and a nozzle, wherein the oxygen gun pipe and the acetylene gun pipe are respectively and fixedly connected in a shell, the oxygen gun pipe and the acetylene gun pipe are longitudinally arranged side by side, the oxygen gas pipe is connected with the upper end of the oxygen gun pipe through the sealing joint, the acetylene gas pipe is connected with the upper end of the acetylene gun pipe through the sealing joint, the nozzle is connected with an end cover, a sealing piece is arranged at the joint of the nozzle and the end cover, the lower ends of the oxygen gun pipe and the acetylene gun pipe are respectively connected with the nozzle, the nozzle is provided with a first input channel, a second input channel and an output channel, the outlet of the first input channel is communicated with the output channel, the outlet of the second input channel is communicated with the output channel, the lower end of the oxygen gun pipe is connected with the inlet of the first input channel of the nozzle, and the lower end of the acetylene gun pipe is connected with the inlet of the second input channel of the nozzle. The nozzle is disposed adjacent to the gun head.
2. The underwater oxyacetylene flame preheating integrated welding gun device according to claim 1, wherein a water stop valve is connected to the lower portion of the oxygen gun barrel, and a water stop valve is connected to the lower portion of the acetylene gun barrel.
3. The underwater oxyacetylene flame preheating integrated welding gun device according to claim 1 or 2, wherein an included angle alpha of an axis of the gun head relative to a normal line of a surface of a workpiece to be welded is 30-45 degrees, and an included angle beta of an axis of the nozzle relative to the normal line of the surface of the workpiece to be welded is 20-35 degrees.
4. The underwater oxyacetylene flame preheating integrated welding gun device according to claim 3, wherein the distance L between the nozzle and the end part of the welding gun head is 10-25 mm.
5. The underwater oxyacetylene flame preheating integrated welding gun device according to claim 1, wherein a sealing piece arranged at the joint of the lower part of the wire feeding channel and the end cover is a sealing ring.
6. The underwater oxyacetylene flame preheating integrated welding gun device according to claim 1, wherein a sealing piece at the joint of the nozzle and the end cover is a sealing ring.
7. The underwater oxy-acetylene flame preheating integrated welding gun device according to claim 1, further comprising a mounting clamping seat connected with the upper end of the housing.

Description

Underwater oxyacetylene flame preheating integrated welding gun device Technical Field The invention relates to the technical field of underwater welding, in particular to an underwater oxyacetylene flame preheating integrated welding gun device. Background With the continuous development of the underwater welding technology, the underwater welding is widely applied to the fields of ocean engineering, ship repair, deep sea pipeline maintenance and the like. However, due to the special environment under water, the water cooling effect negatively affects the welding quality, water is a strong cooling medium, resulting in a rapid dissipation of heat. In order to reduce the negative impact of the water cooling effect on the weld quality, those skilled in the art take some measures, such as arc heating, but the arc heat source has difficulty in effectively heating the weld joint area, resulting in insufficient heat input during welding, too fast weld joint cooling, and easy generation of cracks, air holes and welding defects. For another example, refer to the patent of CN210334835U, which discloses a three-layer drain cover system, including a preheating system, to make the welding space be in a low pressure or dry area, and to control the welding conditions, and the key point is to integrate the functions of draining, exhausting and preheating, and to construct a more complete field weld zone environment, wherein the preheating device has a complex structure, and the preheating device needs to be installed separately in the preparation stage before welding, and the installation process has complicated operation, so that the preheating device has no simplicity in realizing the preheating function. In addition, the preheating device has poor flexibility in use and insufficient adaptability to different welding scenes. Disclosure of Invention The application aims to solve the technical problems that the preheating device of the existing underwater welding equipment is difficult to effectively preheat, has complex operation and poor convenience in the using process and poor use flexibility, and provides the underwater oxyacetylene flame preheating integrated welding gun device which can effectively preheat, is convenient to operate and improves the welding quality. The application provides an underwater oxyacetylene flame preheating integrated welding gun device which comprises a shell, an end cover, a wire feeding welding gun and an oxyacetylene flame gun, wherein the end cover is connected with the lower end of the shell; The wire feeding welding gun comprises a wire feeding channel and a gun head, wherein the gun head is connected with the wire feeding channel, the end part of the gun head is provided with a wire guide nozzle, the lower part of the wire feeding channel penetrates through the end cover, and a sealing element is arranged at the joint of the lower part of the wire feeding channel and the end cover; The oxygen acetylene flame gun comprises an oxygen gas pipe, an acetylene gas pipe, an oxygen gun pipe, an acetylene gun pipe, a sealing joint and a nozzle, wherein the oxygen gun pipe and the acetylene gun pipe are respectively and fixedly connected in a shell, the oxygen gun pipe and the acetylene gun pipe are longitudinally arranged side by side, the oxygen gas pipe is connected with the upper end of the oxygen gun pipe through the sealing joint, the acetylene gas pipe is connected with the upper end of the acetylene gun pipe through the sealing joint, the nozzle is connected with an end cover, a sealing piece is arranged at the joint of the nozzle and the end cover, the lower ends of the oxygen gun pipe and the acetylene gun pipe are respectively connected with the nozzle, the nozzle is provided with a first input channel, a second input channel and an output channel, the outlet of the first input channel is communicated with the output channel, the outlet of the second input channel is communicated with the output channel, the lower end of the oxygen gun pipe is connected with the inlet of the first input channel of the nozzle, the lower end of the acetylene gun pipe is connected with the inlet of the second input channel of the nozzle, and the nozzle is adjacently arranged with the gun head. Preferably, the lower part of the oxygen gun tube is connected with a water stop valve, and the lower part of the acetylene gun tube is connected with a water stop valve. Preferably, the included angle alpha of the axis of the gun head relative to the normal of the surface of the workpiece to be welded is 30-45 degrees, and the included angle beta of the axis of the nozzle relative to the normal of the surface of the workpiece to be welded is 20-35 degrees. Preferably, the distance L between the nozzle and the end part of the welding gun head is 10-25 mm. Preferably, the sealing element arranged at the joint of the lower part of the wire feeding channel and the end cover is a sealing ring. Preferably, the seal