CN-121994608-A - Pressure vessel connecting pipe welding pressure-resistant test plugging tool

CN121994608ACN 121994608 ACN121994608 ACN 121994608ACN-121994608-A

Abstract

The invention discloses a pressure-proof test plugging tool for welding a pressure vessel connecting pipe, which comprises a plug, a connecting pipe support, a fixed ring, a first connecting block and a second connecting block, wherein the connecting pipe support is sleeved outside the fixed ring and coaxially arranged, the outer surface of the connecting pipe support can be abutted against the inner wall of the pressure vessel, the first connecting block and the second connecting block are positioned between the fixed ring and the connecting pipe support and are respectively positioned on two sides of the fixed ring, the two ends of the first connecting block and the second connecting block are respectively connected with the fixed ring and the connecting pipe support, the outer surface of the connecting pipe support can be abutted against the inner side surface of the pressure vessel connecting pipe, the plug is used for plugging a connecting pipe port of the pressure vessel, and the first connecting block and the second connecting block are positioned on the same diameter.

Inventors

WANG GANG
JIANG GUOYAN
LIANG HUA
WANG JING
ZHENG HUAN
CHEN YAOMAO
LEI JIAWEI
LIU JUN

Assignees

东方电气(广州)重型机器有限公司

Dates

Publication Date: 20260508
Application Date: 20260213

Claims (10)

1. The pressure vessel connecting pipe welding pressure-resistant test plugging tool is characterized by comprising a plug, a connecting pipe support, a fixed ring, a first connecting block and a second connecting block, wherein the connecting pipe support is sleeved on the outer side of the fixed ring and coaxially arranged, the outer surface of the connecting pipe support can be abutted to the inner wall of a pressure vessel, the first connecting block and the second connecting block are positioned between the fixed ring and the connecting pipe support and are respectively positioned on two sides of the fixed ring, two ends of the first connecting block and two ends of the second connecting block are respectively connected with the fixed ring and the connecting pipe support, the outer surface of the connecting pipe support can be abutted to the inner side surface of the connecting pipe of the pressure vessel, the plug is used for plugging a connecting pipe port of the pressure vessel, and the first connecting block and the second connecting block are positioned on the same diameter.
2. The pressure vessel connecting pipe welding pressure-resistant test plugging tool of claim 1, wherein the connecting pipe support comprises a first support semi-ring and a second support semi-ring which are butted and have approximately circular radial sections, and one ends of the first connecting block and the second connecting block, which are far away from the fixing ring, are tapered and can be respectively inserted between two ends of the first support semi-ring and the second support semi-ring.
3. The pressure vessel connecting pipe welding pressure-resistant test plugging tool according to claim 2, wherein conical half holes are formed in two ends of the first support half ring and the second support half ring, two adjacent conical half holes can be butted to form conical holes, two conical holes are formed when the first support half ring and the second support half ring are butted, and the first connecting block and the second connecting block can be inserted into the two conical holes respectively.
4. The pressure vessel connecting pipe welding pressure-resistant test plugging tool according to claim 3, wherein the first connecting block and the second connecting block are identical in structure and are conical bolts, the fixing ring is cylindrical, two coaxial threaded holes are formed in the wall of the fixing ring, the axes of the two threaded holes are located on the same diameter of the fixing ring, and one end of the first connecting block is provided with external threads matched with the threaded holes.
5. The pressure vessel connecting pipe welding pressure test plugging tool according to claim 4, wherein the first support semi-ring and the second support semi-ring are identical in structure, and at least one through hole is formed in the first support semi-ring.
6. The pressure vessel connecting pipe welding pressure test plugging tool according to claim 5, wherein the axial length of the connecting pipe support is greater than that of the fixing ring.
7. The pressure vessel connecting pipe welding pressure-resistant test plugging tool of claim 6, wherein the plug is hollow and communicated with the pressure vessel connecting pipe, one end of the plug is plugged, and the other end of the plug is provided with an opening and is matched and butted with a pipe orifice of the pressure vessel connecting pipe.
8. The pressure vessel connecting pipe welding pressure-resistant test plugging tool according to claim 2, wherein the plug is convexly provided with an annular bulge on the end face of the opening end, the outer diameter of the annular bulge is matched with the inner diameter of the pressure vessel connecting pipe, and the annular bulge can be inserted into the pressure vessel connecting pipe and contacted or clung to the inner wall of the pressure vessel connecting pipe.
9. The pressure vessel connecting pipe welding pressure test plugging tool according to claim 8, wherein the inner diameter of the plug is smaller than the inner diameter of the pressure vessel connecting pipe, and the inner diameter of the annular bulge is equal to the inner diameter of the plug.
10. The pressure vessel connecting pipe welding pressure-resistant test plugging tool of claim 8, wherein a notch is formed in the outer side edge of one end, close to the plug, of the connecting pipe support, and the annular protrusion can fill the notch.

Description

Pressure vessel connecting pipe welding pressure-resistant test plugging tool Technical Field The invention belongs to the technical field of deformation prevention of pipe fittings, and particularly relates to a plugging tool for a pressure vessel connecting pipe welding pressure-resistant test. Background Currently, pressure vessels are essential core equipment in many industries such as energy, chemical industry, aerospace, medical treatment, food and the like, and pressure tests are required before the pressure vessels are manufactured and put into use so as to verify the integrity and the pressure strength of pressure boundaries and ensure that the vessels can safely and reliably operate under preset conditions. When pressure vessel withstand tests are performed, welded tooling is often used as an effective means for temporarily plugging a connection tube. The plugging tool is welded on the axial allowance of the end part of the connecting pipe, after the test is finished, the axial allowance of the connecting pipe is cut off, and then a groove is processed on the end surface of the connecting pipe so as to be in butt welding with a system pipeline. Welding type shutoff frock is widely used with its sufficient intensity and reliable sealing performance, especially in the occasion that some structural condition restrictions can't use mechanical seal, can only use welding type shutoff frock. However, the welding operation of the end part of the connecting pipe is often accompanied with the problem of welding deformation of the pipe orifice, the deformed pipe orifice is generally elliptical, the roundness of the connecting pipe orifice is out of tolerance, the butt joint and welding of the connecting pipe and a system pipeline are affected, the size of the connecting pipe orifice is often caused to exceed the tolerance range, the butt joint precision of the connecting pipe of the pressure vessel and the system pipeline is affected, and particularly in the scene of higher butt joint assembly precision requirement, the treatment difficulty and the repair cost are both obviously increased. Therefore, a new technology is needed to solve the problem that welding deformation is easy to occur when the pressure vessel orifice welding and plugging tool in the prior art. Disclosure of Invention In order to solve the problems in the prior art, the invention provides the plugging tool for the pressure-resistant test of welding the connecting pipe of the pressure vessel, which has a simple structure, and is not easy to cause welding deformation of the pipe orifice in the process of the plugging tool for the pressure-resistant test of welding the pipe orifice when the connecting pipe of the pressure vessel is subjected to the pressure-resistant test. The invention adopts the following technical scheme: The utility model provides a pressure vessel takeover welding withstand voltage test shutoff frock, includes end cap, solid fixed ring, takeover support, first connecting block and second connecting block, the takeover support suit is in gu fixed ring outside and coaxial setting, takeover support surface can with pressure vessel inner wall butt, first connecting block with the second connecting block is located gu fixed ring with take over support between and be located respectively gu fixed ring's both sides, first connecting block the both ends of second connecting block all with gu fixed ring, takeover support connection respectively, take over support surface can with pressure vessel takeover medial surface butt, the end cap is used for shutoff pressure vessel takeover port, first connecting block the second connecting block is located same diameter. As a further improvement of the technical scheme of the invention, the connecting pipe support comprises a first support semi-ring and a second support semi-ring which are in an approximate circular shape in radial section after being in butt joint, and one ends of the first connecting block and the second connecting block, which are far away from the fixing ring, are both conical and can be respectively inserted between two ends of the first support semi-ring and the second support semi-ring. As a further improvement of the technical scheme of the invention, two ends of the first support semi-ring and the second support semi-ring are respectively provided with a conical semi-hole, two adjacent conical semi-holes can be butted to form conical holes, two conical holes are formed when the first support semi-ring is butted with the second support semi-ring, and the first connecting block and the second connecting block can be respectively inserted into the two conical holes. As a further improvement of the technical scheme of the invention, the first connecting block and the second connecting block have the same structure and are conical bolts, two coaxial threaded holes are formed in the wall of the fixed ring, the axes of the two threaded holes are positioned on the same