CN102773652A - Automatic centering fixing device for welding of long round pipe - Google Patents

Abstract

The invention discloses an automatic centering and fixing device for long round pipe welding. The current devices generally need to be fixed manually, and the welding can only be realized after multiple measurements and adjustments. The positioning accuracy is low, and it is time-consuming and laborious. The locking rod of the present invention is composed of several conical sections in the same direction, the concentric sleeve has positioning holes, and each conical section on the corresponding locking rod has at least three through grooves in the circumferential direction. All have arc-shaped elastic metal sheets that bulge outward. The hydraulic cylinder is equipped with a hydraulic cylinder fixing sleeve. The hydraulic cylinder fixing sleeve is threaded with the inner wall of the locking rod. The hydraulic cylinder piston rod is fixed on the piston rod fixing plate. Positioning bolts are installed in the circumferential direction, each positioning bolt is equipped with a copper sleeve and placed in the chute of the locking rod, and each positioning bolt is screwed and fixed on the positioning hole of the concentric sleeve. The present invention can automatically realize high-precision positioning without multiple measurements and adjustments, eliminates the steps of spot welding and fixing, and directly performs welding, saving time and effort.

Description

Automatic centering and fixing device for long round pipe welding

technical field

The invention relates to a device for automatically centering and fixing two sections of round pipes, in particular to quickly and automatically center and fix two sections of round pipes with the same inner diameter, so that the two sections of round pipes can be welded conveniently.

Background technique

The various pipelines on the ship are called the "blood vessels" of the ship. As the main path for the power transmission of the ship, transporting steam, gas, water and oil, etc., it plays a very important role in the ship. When the ship manufacturing process requires Centering welding is performed on a large number of pipelines. When welding two sections of round pipes with different diameters together, the two sections of round pipes need to be spatially positioned to center the two sections of pipes before welding.

At present, most of the methods for spatial positioning before welding two sections of round pipes are manual fixing. Although manual fixing can also be used to achieve the centering of the two sections of circular pipes, it takes multiple measurements and adjustments to achieve welding, and the positioning accuracy is low, time-consuming and labor-intensive.

The above problems can be avoided by adopting the long round tube welding automatic centering fixture. Chinese patent CN 201012445Y discloses a circular pipe welding locator. The patent uses an elastic locking sleeve to lock the inner wall of the circular pipe, and a release nut is provided to offset the end face of the circular pipe. The release nut must be placed outside the circular pipe and tightened by hand. , not applicable to welding centering of two long pipes.

Contents of the invention

The invention provides an automatic centering and fixing device for long round pipe welding. Use this long round pipe welding automatic centering fixture to center two sections of round pipes. It is suitable for longer lengths of round pipes with the same inner diameter. It is automatically centered and fixed by hydraulic power. It has high positioning accuracy, is convenient and quick, and saves time and effort.

The technical solution adopted by the present invention to solve its technical problems is:

Long round pipe welding automatic centering fixing device, including locking rod, concentric sleeve, elastic locking sleeve, steel ball, piston rod fixing plate, fixing bolt, copper sleeve, fixing nut, hydraulic cylinder fixing sleeve and hydraulic cylinder. The locking rod is composed of several conical sections in the same direction, one end of which is a hollow cylinder with a chute, the inner wall is processed with threads, and the other end is a circumferential rib. The concentric sleeve has a The positioning hole, the concentric sleeve corresponding to each tapered section on the locking rod has at least three through grooves in the circumferential direction, and there are steel balls in each through groove, the number of elastic locking sleeves and the tapered sections on the locking rod Equal, the elastic locking sleeve is axially fixed on the same side of the through groove on the concentric sleeve, and the section of the elastic locking sleeve corresponding to the through groove has arc-shaped elastic metal sheets that bulge outward, and the steel balls are respectively It is offset against the corresponding tapered section of the locking rod and the elastic metal sheet of the elastic locking sleeve, and the elastic metal sheet is offset against the inner walls of the first round tube and the second round tube. The hydraulic cylinder is equipped with a hydraulic cylinder fixing sleeve, and the hydraulic cylinder fixing sleeve Cooperate with the thread on the inner wall of the locking rod, the piston rod of the hydraulic cylinder is fixed on the piston rod fixing plate through the fixing nut, and four positioning bolts are installed on the circumference of the piston rod fixing plate, each positioning bolt is equipped with a copper sleeve and placed on the In the chute, each positioning bolt is tightened and fixed on the positioning hole of the concentric sleeve, and the hydraulic cylinder is connected with the external power source.

The hydraulic cylinder is a single-acting spring return hydraulic cylinder.

The beneficial effects of the present invention are: the present invention can be directly placed in the long pipe, compared with the positioning and centering of artificial round pipes, it can automatically realize high-precision positioning without multiple measurements and adjustments, and avoids the steps of spot welding and fixing , direct welding, saving time and effort.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is an enlarged cross-sectional view along line A-A of Fig. 1 .

Detailed ways

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1 and Figure 2, the automatic centering and fixing device for long round pipe welding includes locking rod 6, concentric sleeve 5, elastic locking sleeve 3, steel ball 2, piston rod fixing plate 8, fixing bolt 9, copper sleeve 10. Fixing nut 19, hydraulic cylinder fixing sleeve 15 and hydraulic cylinder 14. The locking rod 6 is composed of several conical sections in the same direction, one end of which is a hollow cylinder and has a slide groove 18, the inner wall is processed with a thread 12, and the other end is a circumferential rib 20, and the concentric sleeve 5 is opposite There are positioning holes 11 on the chute 18, and each tapered section on the concentric sleeve 5 corresponding to the locking rod 6 has at least three through grooves 7 in the circumferential direction. There are steel balls 2 in each through groove 7, and the elastic lock The tight sleeve 3 is equal to the number of tapered sections on the locking rod 6, and the elastic locking sleeve 3 is axially fixed on the same side of the through groove 7 on the concentric sleeve 5, and the elastic locking sleeve 3 corresponding to the through groove 7 There are arc-shaped elastic metal sheets 4 protruding outward, and the steel balls 2 are respectively offset against the corresponding tapered section of the locking rod 6 and the elastic metal sheets 4 of the elastic locking sleeve 3, and the elastic metal sheets 4 are in contact with the round tube. One 1 is offset against the inner wall of round pipe two 16, and a hydraulic cylinder fixing sleeve 15 is installed on the hydraulic cylinder 14, and the hydraulic cylinder 14 is fixed on the thread 12 on the inner wall of the locking rod 6, and the hydraulic cylinder piston rod 17 passes through the fixing nut 19 Fixed on the piston rod fixing plate 8, four positioning bolts 9 are installed on the circumference of the piston rod fixing plate 8, each positioning bolt 9 is equipped with a copper sleeve 10 and placed in the chute 18 of the locking rod 6, each positioning bolt 9 Screw and fix on the positioning hole 11 of the concentric sleeve 5, and the hydraulic cylinder 14 is connected with the external power source 13. Hydraulic cylinder 14 adopts single-acting spring reset hydraulic cylinder.

When working, first put the long round pipe welding automatic centering fixture between the round pipe 1 and the round pipe 2 16 to be welded, open the external power source 13 to make the hydraulic cylinder 14 move to the right, and the hydraulic cylinder piston rod 17 to move to the right When moving, the locking rod 6 is driven to move to the right, and the tapered section of the locking rod 6 forces the steel ball 2 to spread the elastic metal sheet 4 of the elastic locking sleeve 3 outwards so as to resist the circular tube one 1 and the circular tube two 16 The inner wall forces the first round pipe 1 and the second round pipe 16 to be centered and concentric, and then welded. After the welding is completed, the power source 14 is removed, and the hydraulic cylinder 15 resets automatically, and the present invention is taken out from the pipeline.

Claims (2)

1. oval pipe welding automatic centering fixture; Comprise check lock lever (6), concentric locking collar (5), elasticity lock sleeve (3), steel ball (2), piston rod fixed head (8), set bolt (9), copper sheathing (10), hold-down nut (19), hydraulic cylinder fixed cover (15) and hydraulic cylinder (14); It is characterized in that: described check lock lever (6) is made up of some conical sections in the same way; The one of which end is hollow cylinder and has chute (18); Inwall is processed with screw thread (12), and the other end is circumferential rib (20), and described concentric locking collar (5) is with respect to locating hole (11) is arranged on the chute (18); Each conical section on the corresponding check lock lever of concentric locking collar (5) (6) is circumferentially having three grooves (7) at least; Steel ball (2) is arranged in each groove (7), and elasticity lock sleeve (3) equates that with conical section quantity on the check lock lever (6) elasticity lock sleeve (3) is axially fixed on groove (7) homonymy on the concentric locking collar (5); On that section elasticity lock sleeve (3) the outwards resilient blade (4) of protuberance of arc is arranged all accordingly with groove (7); Described steel ball (2) offsets with the resilient blade (4) of corresponding conical section of check lock lever (6) and elasticity lock sleeve (3) respectively, and resilient blade (4) offsets with pipe one (1) and pipe two (16) inwalls, and hydraulic cylinder fixed cover (15) is installed on the described hydraulic cylinder (14); Hydraulic cylinder fixed cover (15) cooperates with check lock lever (6) inner thread; Hydraulic cylinder piston rod (17) is fixed on the piston rod fixed head (8) through hold-down nut (19), and piston rod fixed head (8) is circumferentially installed four bolts (9), and each bolt (9) is equipped with copper sheathing (10) and places chute (18) lining of check lock lever (6); Each bolt (9) is tightened on the locating hole (11) of concentric locking collar (5), and hydraulic cylinder (14) joins with external power supply (13).

2. oval pipe welding automatic centering fixture according to claim 1, it is characterized in that: described hydraulic cylinder (14) is a single-acting spring reset hydraulic cylinder.

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