CN-121972778-A - Suspension type tube sheet welding machine head

CN121972778ACN 121972778 ACN121972778 ACN 121972778ACN-121972778-A

Abstract

The application relates to a suspension type tube plate welding machine head which comprises a machine head main body, wherein one end of the machine head main body is provided with a welding torch, a welding torch adjusting mechanism, a wire feeding mechanism and a central positioning shaft, at least two supporting rod assemblies capable of being unfolded radially are arranged around the machine head main body, one end of the integrated box body is connected with the other end of the machine head main body, a lifting appliance is fixed at the top of the integrated box body, a central tube is arranged in the integrated box body in an axial penetrating mode, the central positioning shaft is connected with one end of the central tube through a tightening sleeve assembly, a sliding ring assembly is arranged in the integrated box body and is coaxially sleeved on the periphery of the central tube, and a water-gas sharing flow passage surrounding the sliding ring assembly is further arranged in the integrated box body. The modular design and the highly integrated box body enable the whole machine to be compact in structure and light in weight remarkably, the quick suspension, flexible movement and accurate positioning can be realized through the top lifting appliance, and the adaptability to multi-position welding and narrow space operation of large-scale workpieces is greatly enhanced.

Inventors

LI MIN
WANG XINLEI
WANG HUI
XU JIAJUN
CHEN CHUNMENG

Assignees

江汉大学

Dates

Publication Date: 20260505
Application Date: 20260311

Claims (10)

1. A suspension tube sheet welding head, comprising: The welding torch comprises a machine head main body, wherein one end of the machine head main body is provided with a welding torch, a welding torch adjusting mechanism, a wire feeding mechanism and a central positioning shaft, and at least two supporting rod assemblies capable of being unfolded radially are arranged around the machine head main body; The integrated box body is characterized in that one end of the integrated box body is connected with the other end of the machine head main body, a lifting appliance is fixed at the top of the integrated box body, and a central tube is axially arranged in the integrated box body in a penetrating manner; The central positioning shaft is connected with one end of the central tube through the expansion sleeve assembly; A slip ring assembly is arranged in the integrated box body, and the slip ring assembly is coaxially sleeved on the periphery of the central tube; And a water-air shared runner surrounding the slip ring assembly is also arranged in the integrated box body.
2. The suspension tube sheet welding head as claimed in claim 1, wherein the head body includes a rotary insulating disk, the center positioning shaft is disposed at a center position of the rotary insulating disk, the welding torch is disposed at one side of the center positioning shaft and connected to the rotary insulating disk through a torch adjusting mechanism, and the wire feeding mechanism is disposed at the other side of the center positioning shaft and connected to the rotary insulating disk.
3. The suspended tube sheet welding head as claimed in claim 1, wherein the expansion sleeve assembly comprises an expansion sleeve pull rod, one end of the expansion sleeve pull rod extends into the central positioning shaft and the central tube, the other end of the expansion sleeve pull rod is connected with an expansion sleeve shaft, the expansion sleeve shaft is sequentially sleeved with an expansion sleeve nut, an expansion sleeve and an expansion sleeve ejector rod, and one end of the expansion sleeve ejector rod is sleeved in the central positioning shaft.
4. The suspended tube sheet welding head as set forth in claim 3, wherein the other end of the center tube is further provided with a locking assembly comprising a water sealing flange, the water sealing flange is sleeved with the center tube, a front end center tube is sleeved in the water sealing flange, one end of the front end center tube is connected with a tension sleeve pull rod, the other end of the front end center tube is connected with a locking cylinder installed at the other end of the integrated box, and waterway joints are arranged on the center tube and the front end center tube.
5. The head of claim 4, wherein the center tube is further provided with a distance adjustment assembly comprising a connection flange disposed at an outer periphery of one end of the center tube, the connection flange being connected to the knob mechanism by a connection rod passing through the slip ring assembly.
6. The suspended tube sheet welding machine head as claimed in claim 1, wherein the integrated box body comprises a housing, a rotating bracket bottom plate and a rotating bracket upper plate are sequentially connected to the housing near the main body end of the machine head, a rotating bracket middle plate is sleeved on the peripheries of the rotating bracket bottom plate and the rotating bracket upper plate, the support rod assembly is arranged on the rotating bracket middle plate, an insulating cover plate is arranged in the housing, the interior of the housing is divided into a front cavity and a rear cavity by the insulating cover plate, the slip ring assembly is positioned in the front cavity, and a pipe joint communicated with the water-gas sharing flow passage is arranged on the side wall of the rear cavity and the insulating cover plate.
7. The suspended tube sheet welding head as claimed in claim 6, wherein the slip ring assembly comprises an inner slip ring, the inner slip ring is fixed on the outer circumference of the central tube, the outer circumference of the inner slip ring is sequentially sleeved with a slip ring rear cover, a conductive ring and a slip ring gland near the end of the insulating cover plate, the other end of the inner slip ring is sleeved with an outer slip ring rotationally connected with the inner slip ring, an annular gap is formed between the outer slip ring and the inner slip ring, and the water-gas sharing flow passage is at least partially formed by the annular gap.
8. The suspension tube sheet welding head as claimed in claim 7, further comprising a stepper motor mounted in the rear cavity, an output shaft of the stepper motor being mounted with a pinion gear through a speed reducer, the pinion gear being engaged with a large gear, the large gear being sleeved with an outer periphery of the slip ring outer ring through an insulating liner.
9. The suspended tube sheet welding head as claimed in claim 8, wherein a carbon brush head is provided in the front cavity, and a weak current ring is provided at the other end of the rotary insulating disc, and a brush of the carbon brush head is held in sliding contact with the weak current ring when the head body is connected with the integrated box.
10. The suspension tube sheet welding head as claimed in claim 9, wherein a strong electrical connection board is further provided in the front cavity, the strong electrical connection board being electrically connected to the conductive ring, the conductive ring being electrically connected to the slip ring inner ring of the slip ring assembly.

Description

Suspension type tube sheet welding machine head Technical Field The application relates to the technical field of tube plate welding, in particular to a suspension type tube plate welding machine head. Background In the manufacture of large pressure vessels (e.g., heat exchangers, boilers), tube sheet and tube end welding is a critical process. The traditional manual welding has the problems of unstable quality, low efficiency and high dependence on the skill of workers. Most of the existing automatic welding equipment is a fixed gantry special machine, so that the automatic welding equipment is huge in size and difficult to move, and is difficult to meet flexible production requirements of tube plates with different specifications, field installation and the like. Although the mobility of part of suspension type equipment is improved, the defects of heavy structure, low integration level of systems (water, gas and electricity), insufficient welding torch adjusting precision, lack of effective weld joint tracking function and the like are generally existed. The welding process still needs a large amount of manual intervention, and consistency, reliability and high efficiency of the multi-weld quality of the large tube plate are difficult to ensure. Therefore, there is a need to develop a suspension type welding solution that is compact, accurate in positioning, high in automation degree and easy to move. Disclosure of Invention Based on the above, it is necessary to provide a suspension type tube plate welding machine head, so as to overcome the defects of heavy and inconvenient movement, poor positioning accuracy of a welding gun, low automation level and difficult integration of multiple systems of the existing equipment. A suspension tube sheet welding head comprising: The welding torch comprises a machine head main body, wherein one end of the machine head main body is provided with a welding torch, a welding torch adjusting mechanism, a wire feeding mechanism and a central positioning shaft, and at least two supporting rod assemblies capable of being unfolded radially are arranged around the machine head main body; The integrated box body is characterized in that one end of the integrated box body is connected with the other end of the machine head main body, a lifting appliance is fixed at the top of the integrated box body, and a central tube is axially arranged in the integrated box body in a penetrating manner; The central positioning shaft is connected with one end of the central tube through the expansion sleeve assembly; A slip ring assembly is arranged in the integrated box body, and the slip ring assembly is coaxially sleeved on the periphery of the central tube; And a water-air shared runner surrounding the slip ring assembly is also arranged in the integrated box body. As one preferable mode of the suspension type tube plate welding machine head, the machine head main body comprises a rotary insulating circular plate, the central positioning shaft is arranged at the central position of the rotary insulating circular plate, the welding torch is arranged at one side of the central positioning shaft and is connected with the rotary insulating circular plate through the welding torch adjusting mechanism, and the wire feeding mechanism is arranged at the other side of the central positioning shaft and is connected with the rotary insulating circular plate. As one preferable mode of the suspension type tube plate welding machine head, the expansion sleeve component comprises an expansion sleeve pull rod, one end of the expansion sleeve pull rod extends into the central positioning shaft and the central tube, the other end of the expansion sleeve pull rod is connected with an expansion sleeve shaft, the expansion sleeve shaft is sequentially sleeved with an expansion sleeve nut, an expansion sleeve and an expansion sleeve ejector rod, and one end of the expansion sleeve ejector rod is sleeved in the central positioning shaft. As one preferable mode of the suspension type tube plate welding machine head, the other end of the central tube is further provided with a locking component which comprises a water seal flange, the water seal flange is sleeved with the central tube, a front end central tube is sleeved in the water seal flange, one end of the front end central tube is connected with an expanding sleeve pull rod, the other end of the front end central tube is connected with a locking cylinder arranged at the other end of the integrated box body, and waterway joints are arranged on the central tube and the front end central tube. As one preferable mode of the suspension type tube plate welding machine head, the central tube is further provided with a distance adjusting assembly which comprises a connecting flange, the connecting flange is arranged on the periphery of one end of the central tube, and the connecting flange is connected with the knob mechanism through a connecting rod penetrating t