CN105537846A - Welding fixing clamp suitable for pressure container tube sections - Google Patents

Abstract

The invention discloses a welding fixing clamp suitable for pressure container tube sections. The welding fixing clamp comprises a fixed end outer ring, a fixed end inner ring, a movable end outer ring and a movable end inner ring. The fixed end inner ring is provided with a fixed end wheel plate. The movable end inner ring is provided with a movable end wheel plate. An axial adjusting rod is fixed to the fixed end inner ring, a guide tube is arranged in the center of the movable end inner ring, and multiple fixed end outer ring adjusting bolts, fixed end inner ring adjusting bolts, movable end outer ring adjusting bolts and movable end inner ring adjusting bolts are arranged on the fixed end outer ring, the fixed end inner ring, the movable end outer ring and the movable end inner ring respectively. Pressure container tubes are placed between the inner rings and the outer rings, the adjusting bolts are used for fixing the pressure container tubes, the welding fixing clamp is used for butt joint welding of transverse and annular weld joints of pressure containers of different diameters and different thicknesses, replaces a traditional spot welding method for pre-welding fixing, and is simple in structure, rapid and efficient, welding deformation of the transverse annular weld joints of the pressure containers in the welding process can be effectively avoided, and the welding efficiency and quality of the pressure containers are improved.

Description

A Welding Fixture Applicable to Pressure Vessel Barrel Section

technical field

The invention relates to a welding fixing fixture suitable for a pressure vessel cylinder section, which belongs to the field of welding.

Background technique

Due to the special working environment of the pressure vessel, the welding quality is extremely strict. Usually, the pressure vessel cylinder section is usually fixed by spot welding before welding when welding in the transverse and circular directions. It is difficult to adjust the reserved gap of the weld. During the welding process, due to the uneven heating process, the weld seam of the cylinder joint is often misaligned. At the same time, it is difficult to ensure the cylindricity of the cylinder joint due to the shrinkage and deformation of the weld seam after welding, which brings great trouble to the subsequent processing and affects the efficiency. Especially for some special materials with low hardness, the weld gap and post-weld deformation must be strictly controlled in the welding process to meet the further welding and installation of the barrel joint.

The general circular welding seam welding fixture is mostly designed to only be suitable for a ring structure with one diameter, but due to the different diameters of different pressure vessel models, it cannot meet the welding requirements of different diameters of the cylindrical joint shape, and at the same time, the pressure vessel cylindrical joint is in the circular structure. Before the weld seam welding, the transverse weld seam welding needs to be carried out. It is difficult for the general annular weld seam fixing fixture to meet the welding clamping requirements of these two kinds of weld seams at the same time, and it is difficult to meet the current flexible processing requirements.

Contents of the invention

Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a welding fixture suitable for pressure vessel barrel joints, which is suitable for butt welding of pressure vessels with different diameters and thicknesses in the horizontal and annular welds, and can accurately control Weld seam gap, to solve the problems of difficult positioning of weldments during welding and post-weld deformation.

Technical solution: In order to solve the above technical problems, a welding fixing fixture suitable for pressure vessel barrel joints according to the present invention includes a fixed end outer ring, a fixed end inner ring, a movable end outer ring and a movable end inner ring, and the fixed end The inner ring is provided with a fixed end wheel plate for supporting the fixed end inner ring, the movable end inner ring is provided with a movable end wheel plate for supporting the movable end inner ring, and the fixed end inner ring is fixed with an axial adjustment rod, so The center of the inner ring of the movable end is provided with a limitable guide cylinder that can move along the axial adjustment rod, and there are several fixed end rings on the outer ring of the fixed end, the inner ring of the fixed end, the outer ring of the movable end and the inner ring of the movable end. The adjusting bolts of the outer ring, the adjusting bolts of the inner ring at the fixed end, the adjusting bolts of the outer ring at the movable end, and the adjusting bolts of the inner ring at the movable end; The heads of the adjustment bolts and the inner ring adjustment bolts at the movable end are correspondingly and oppositely distributed.

Preferably, several fan-shaped grooves are evenly distributed on the fixed-end wheel plate and the movable-end wheel plate, and the adjusting bolts of the fixed-end inner ring and the movable-end inner ring adjusting bolts are located in the fan-shaped grooves.

Preferably, the axial adjustment rod is a screw rod, and the inner wall of the guide cylinder is provided with threads.

Preferably, the axial adjustment rod is a smooth rod, and the guide cylinder is provided with a locking device for locking the smooth rod.

Preferably, the locking device is a locking bolt, and the locking bolt is screwed into the guide cylinder to compress the axial adjustment rod.

Beneficial effects: the welding fixing fixture suitable for the pressure vessel cylinder section of the present invention places the pressure vessel cylinder between the inner ring and the outer ring, and uses adjusting bolts to fix the pressure vessel cylinder, and is used for pressures of different diameters and thicknesses. The container is welded horizontally with the circular seam, replacing the traditional spot welding method for fixing before welding. The gap between the weld seams can be accurately controlled by rotating the cylinder joint in reverse to prevent problems such as displacement and post-weld deformation of the cylinder joint during the welding process. Simple, fast and efficient, it can effectively prevent the welding deformation of the horizontal and circular welds of the pressure vessel during the welding process, and improve the welding efficiency and welding quality of the pressure vessel.

Description of drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of butt welding of girth weld of the present invention.

Fig. 3 is a schematic diagram of butt welding of transverse seam according to the present invention.

In the figure: 1-fixed end outer ring; 2-fixed end outer ring adjusting bolt; 3-fixed end inner ring adjusting bolt; 4-fixed end inner ring; 5-axial adjusting screw; 6-axial adjusting nut; 7 -Adjusting bolt of the outer ring of movable end; 8-Outer ring of movable end; 9-Adjusting bolt of inner ring of movable end; 10-Inner ring of movable end; 11-Wheel plate of fixed end; 12-Wheel plate of movable end; ; 14 - Transverse welds.

detailed description

As shown in Fig. 1 to Fig. 3, a welding fixing fixture suitable for a pressure vessel cylinder section according to the present invention includes a fixed end outer ring 1, a fixed end inner ring 4, a movable end outer ring 8 and a movable end inner ring 10, The fixed end inner ring 4 is provided with a fixed end wheel plate 11 for supporting the fixed end inner ring 4, and the movable end inner ring 10 is provided with a movable end wheel plate 12 for supporting the movable end inner ring 10. The inner ring 4 is fixed with an axial adjustment rod 5, and the center of the movable end inner ring 10 is provided with a position-limiting guide cylinder 6 that moves along the axial adjustment rod 5. The fixed end outer ring 1, the fixed end inner ring 4, The outer ring 8 of the movable end and the inner ring 10 of the movable end are respectively provided with nine uniformly distributed fixed-end outer-ring adjusting bolts 2, fixed-end inner-ring adjusting bolts 3, movable-end outer-ring adjusting bolts 7 and movable-end inner-ring adjusting bolts 9. The head of the fixed end outer ring adjusting bolt 2 and the fixed end inner ring adjusting bolt 3 are oppositely distributed, and the heads of the movable end outer ring adjusting bolt 7 and the movable end inner ring adjusting bolt 9 are correspondingly oppositely distributed.

In the invention, the fixed end wheel plate 11 and the movable end wheel plate 12 are evenly distributed with six fan-shaped grooves, the fixed end inner ring adjusting bolt 3 and the movable end inner ring adjusting bolt 9 are located in the fan-shaped groove, and the fan-shaped groove The central angle is 20°.

In the invention, the structure of the axial adjustment rod 5 can be a screw, and the inner wall of the guide cylinder 6 is provided with threads. The axial adjustment rod 5 can also be a smooth rod, and the guide cylinder 6 is provided with a locking device for locking the smooth rod. The locking device is a locking bolt, and the locking bolt is screwed into the guide cylinder 6 to compress the axial adjustment. pole 5.

When the transverse weld 14 is required, install the fixed end inner ring 4 on the inner side of the end of the pressure vessel barrel, put the fixed end outer ring 1 on the outer side, turn the fixed end outer ring adjusting bolt 2 and the fixed end inner ring to adjust Bolt 3, fix one end of the pressure vessel barrel section, fix the movable end outer ring 8 and the movable end inner ring 10 at the other end of the pressure vessel barrel section in the same way, and then transverse welding can be performed. When the circular weld 13 needs to be welded, install the fixed end inner ring 4 on the inner side of the end of the pressure vessel barrel, put the fixed end outer ring 1 on the outside, and screw the fixed end outer ring adjusting bolt 2 and the fixed end inner ring The adjusting bolt 3 is used to fix one end of the cylinder section of the pressure vessel, and the outer ring 8 of the movable end and the inner ring 10 of the movable end are installed at the end of the cylinder section of the other pressure vessel. By adjusting the adjusting bolt 7 of the outer ring of the movable end and the inner ring adjusting bolt of the movable end 9 Fix the pressure vessel barrel joints, move the two pressure vessel barrel joints, weld the two pressure vessel barrel joints through the annular weld 13, the two pressure vessel barrel joints will not be displaced during the welding process, and the welding quality is high.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (5)

1. A welding fixture suitable for pressure vessel barrel joints, characterized in that it includes a fixed end outer ring, a fixed end inner ring, a movable end outer ring and a movable end inner ring, and the fixed end inner ring is provided with a fixed end The wheel plate is used to support the inner ring at the fixed end. The inner ring at the movable end is provided with a wheel plate at the movable end to support the inner ring at the movable end. The inner ring at the fixed end is fixed with an axial adjustment rod. The center of the inner ring at the movable end There is a position-limiting guide cylinder that can move along the axial adjustment rod. There are several fixed-end outer ring adjusting bolts and fixed-end outer rings on the fixed-end outer ring, fixed-end inner ring, movable-end outer ring and movable-end inner ring The adjusting bolts of the inner ring at the end, the adjusting bolts of the outer ring at the movable end and the adjusting bolts of the inner ring at the movable end, the adjusting bolts of the outer ring at the fixed end and the adjusting bolts of the inner ring at the fixed end correspond to the opposite distribution, the adjusting bolts of the outer ring at the movable end and the inner ring at the movable end The head of the ring adjustment bolt corresponds to the opposite distribution. 2. The welding fixing fixture suitable for pressure vessel barrel joints according to claim 1, characterized in that: several fan-shaped grooves are evenly distributed on the fixed end wheel plate and the movable end wheel plate, and the inner ring of the fixed end adjusts the bolts and the adjusting bolt of the inner ring of the movable end are located in the fan-shaped groove. 3. The welding fixing fixture suitable for the cylinder section of the pressure vessel according to claim 2, characterized in that: the axial adjustment rod is a screw rod, and the inner wall of the guide cylinder is provided with threads. 4. The welding fixture suitable for pressure vessel barrel joints according to claim 2, characterized in that: the axial adjustment rod is a smooth rod, and the guide cylinder is provided with a locking device for locking the smooth rod. 5. The welding fixing fixture suitable for pressure vessel barrel joints according to claim 4, characterized in that: the locking device is a locking bolt, and the locking bolt is screwed into the guide cylinder to compress the axial adjustment rod.