RU2481933C1 - Tube welding machine drive - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to welding and may be used in tube butt welding at main pipelines. Swing levers are mounted at three-arm case and coupled with spider. Drive rollers are arranged at said levers. Machine drive is composed of feared motors, at least, one of them being provided with displacement transducer and brake. Hydraulic cylinder barrel is rigidly coupled with three-arm case to accommodate piston to make rod chamber communicated with accumulator and hydraulic system and piston chamber communicated with hydraulic system. Rod is coupled by sleeve with aforesaid spider.

EFFECT: decreased weight and sizes, higher reliability and efficiency.

6 dwg

Description

List of documents cited in the search report: SU 818788, 04/07/1981; SU 938488, 11/30/1983; RU 2323073 C1, 04/27/2008.

The invention relates to equipment for welding ring joints of pipes in the construction of pipelines and stationary welding conditions.

Known devices that use the movement of the machine for welding pipes.

These devices are taken as analogues. See the patent for the invention "Machine for flash butt welding of pipes", see USSR patent for invention No. 818788, publ. Bull. No. 18 dated 04/07/1981, application No. 2625038 / 25-27 dated 05/04/1978, V23K 11/04.

The machine consists of a welding head, a compartment with hydraulic equipment, a pump station, a pump station drive and a machine moving mechanism in a welded pipe, a moving reducer and a moving mechanism.

The invention is known "Machine for flash butt welding of pipes" No. 938488, publ. 11/30/1983, application No. 2767079 / 25-27 of 05/22/1979, V23K 11/04, V23K 31/02.

The machine comprises a device with a tube clamping mechanism, a puller, a fusion and precipitation drive, and a self-centering device located in the housing with support and drive rollers and a spring mechanism for driving the drive rollers to the pipe, rigidly connected to the rod of the power cylinder. The self-centering device is equipped with three three-arm levers, the rolling axes of which are uniformly distributed around the circumference of the housing, a drive roller of a self-centering device is installed on one of the arms of each lever, a support roller of a self-centering device is mounted on the other, the rod of the power cylinder is equipped with a disk rigidly fixed to it and pivotally connected to it the third shoulder of each three-arm lever.

The disadvantage of these devices is the presence of separately mounted on the machine for welding pipes of the drives of the movement mechanism and the gear of the movement mechanism. This disadvantage does not allow to achieve the technical result of the invention, which consists in reducing the overall dimensions of the machine for welding pipes.

The invention is known "Reflow welding unit, welding head and moving mechanism for it", see RF patent for the invention No. 2323073, publ. Bull. No. 12 dated April 27, 2008, application No. 2007119194/02 dated May 24, 2007, V23K 11/04, V23K 101/06. This invention is taken as the closest analogue - the prototype.

The installation includes a control station, a rod and a welding machine. The machine consists of a two-speed transfer case, a movement mechanism for moving the machine inside the pipe, pump station, scraper and welding head. The movement mechanism is made in the form of a three-beam support, on which two paired and combined in one welded gear case, drive from a two-speed transfer case, are pivotally mounted on the cheeks evenly around the circumference. The welding head is connected through a two-speed transfer case and a pump station with a movement mechanism and contains a central hollow pipe, a welding transformer, clamping and draft carts, two-part levers, steel and conductive plates. Clamping and draft carts are slidable along the axis of the central hollow pipe. Two-part levers are located evenly around the circumference of the hollow pipe on each of the trolleys of clamping and draft and pivotally connected to each other. Steel and conductive plates are mounted on levers and connected by flexible tires to the welding transformer.

The disadvantages of this installation are:

- the presence of a two-speed transfer case. The limitation on the smoothness of movement and the provision of various speeds of movement of the machine for welding pipes

- the presence of the left side of the pumping station with electric motors placed there (electric displacement motor and cruising speed electric motor). A significant increase in the overall dimensions and weight of the pipe welding machine;

- the presence of springs for emergency preload reducers to the welded pipe. Springs lose their rigidity and do not provide emergency clamp.

These disadvantages do not allow to achieve the technical result of the invention.

The objective of the invention is as follows:

- providing the possibility of stepless setting any speed of movement of the machine for welding pipes when moving in the pipeline;

- reducing the overall dimensions and mass of the movement mechanism of the machine for welding pipes;

- improving the reliability of the machine for flash butt welding of pipes.

The technical result of the invention are as follows:

- the ability to continuously set any movement speed when moving in the pipe machine for welding pipes;

- reducing the overall dimensions of the machine for welding pipes;

- improving the reliability of the machine for welding pipes.

The set of essential features of the claimed mechanism for moving the machine for welding pipes does not follow explicitly from the studied prior art, has significant differences from the considered analogues. Therefore, the applicant believes that the claimed movement mechanism of the pipe welding machine meets the criterion of "novelty" and has an inventive step.

The invention is illustrated by drawings, which show an example implementation of the claimed system.

List of drawings

Figure 1 - movement of the machine for welding pipes, hereinafter referred to as the "movement mechanism", front view.

Figure 2 is a view A (left view of the movement mechanism).

Figure 3 - view B (right side view of the movement mechanism).

Figure 4 - section bb (section along the vertical plane of the movement mechanism).

Figure 5 - section GG (section along the planes of two gear motors).

In Fig.6 - section DD (section along the planes of two rolling levers).

The positions in the figures indicate: three-beam housing - 1; rolling lever - 2; gear motor - 3; lead roller - 4; cylinder - 5; sleeve - 6; stock - 7; sleeve - 8; crosspiece - 9; axis - 10; gear motor with displacement sensor and brake - 11; axis - 12; axis - 13; pipe - 14; pipe - 15; piston - 16; battery - 17; stock cavity - E; piston cavity - J.

The movement mechanism consists of a three-beam housing 1 (Fig. 1), on which rolling levers 2 (Fig. 1) are mounted through the axis 12 (Fig. 1). The rolling levers 2 are mounted using axles 13 (Fig. 5), gear motors 3 (Fig. 1), a gear motor with a displacement sensor and a brake - 11 (Fig. 1) and drive rollers 4 (Fig. 1). The sleeve 6 (figure 4) of the cylinder 5 (figure 4) is rigidly connected to the three-beam housing 1 (figure 4), and the rod 7 (figure 4) passes through the sleeve 8 (figure 4) in the three-beam case 1 and is rigidly connected with a cross 9 (figure 4). The crosspiece 9 (figure 5) is connected through the axis 10 (figure 5) with the levers 2 (figure 5). The rod cavity E (Fig. 5), formed by the piston 16 (Fig. 5), of the cylinder 5 is connected through a pipe 14 (Fig. 5) to the accumulator 17 (Fig. 5) and a hydraulic system (not shown). The piston cavity G (FIG. 5) formed by the piston 16 (FIG. 5) of the cylinder 5 is connected through a pipe 15 (FIG. 5) to a hydraulic system (not shown).

The movement mechanism works as follows.

Before starting the machine for pipe welding, pressure is supplied from the hydraulic system to the piston cavity Ж of cylinder 5. In this case, the rod 7 and piston 16, together with the crosspiece 9, move to the left side (relative to FIG. 5), and the rolling lever 2 rotates on the axes 12 and drives the drive rollers away from the walls of the pipeline 4. After that, the pipe welding machine is brought into the pipeline so that the drive rollers of the movement mechanism enter the pipeline. Then pressure is supplied from the hydraulic system to the rod cavity E of the cylinder 5 and the rod 7 and the piston 16 are moved together with the cross 9 to the right (relative to FIG. 5), and the rolling lever 2 is rotated on the axes 12 and engages the drive rollers 4 with the inner plane of the pipeline . The sleeve 8 is designed for uniform breeding of the drive rollers 4, the rod 7 slides along it when moving. After that, an electric signal is supplied to the gearmotors 3 and the gearmotor with a displacement sensor and a brake 11 and the machine makes a working stroke to the weld point, while smoothly accelerating and braking, and the displacement sensor in a geared motor with a displacement sensor and brake 11 allows guaranteed to install the machine for welding pipes in the required position.

This achieves a technical result that is not in the prototype, the ability to continuously set any movement speed when moving in the pipe of the pipe welding machine, the overall dimensions are reduced, and the reliability of the pipe welding machine is increased.

Thus, the above information indicates the possibility of using the invention in the form as described in the claims using the known and proposed tools described above in the application. Therefore, the claimed invention meets the requirement of "industrially applicable under applicable law". According to the invention, the design and technological documentation of the machine for flash butt welding of pipes is developed. A prototype is manufactured and tested. Tests gave a positive result.

Claims (1)

The movement mechanism of a pipe welding machine, comprising a three-beam housing, rolling levers mounted on it, connected to a cross on which drive rollers are mounted, as well as a movement drive and a hydraulic system connected to the hydraulic cylinder, characterized in that the movement drive is made in the form of a motor gearboxes, at least one of which is equipped with a displacement sensor and a brake, while the sleeve of the hydraulic cylinder is rigidly connected to the three-beam housing, in which the piston is placed with the formation of the rod polo a joint connected to the accumulator and the hydraulic system, and a piston cavity connected to the hydraulic system, and the rod is rigidly connected to the cross by means of a sleeve.

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