SU1127671A1 - Pipe expansion device - Google Patents

Abstract

A DEVICE FOR DISTRIBUTING PIPES in a tube sheet containing a power cylinder with a rod, on which a spacer assembly with a conical sleeve and an insert is mounted, dispensing an elastic sleeve and a cone, in order to expand its technological capabilities by enabling the distribution of pipes with welded a seam, it is provided with an axially mounted movement on the shaft of the power cylinder, a sleeve with an annular collar disposed between the distributing sleeve and the insert, the latter nen in form of an elastic sleeve fixed with respect to the sliding sleeve. yu od

Description

,one . ; The invention relates to mechanical engineering and can be used in the manufacture of heat exchangers, in particular air heaters for steam boilers. A device for dispensing pipes in a tube plate is known, which contains, consequently, hydrocyline p, which interacts with each other, hydrocillin p, thrust bushing and spacing unit C13. The main disadvantage of this device is the poor quality of the connection, due to the fact that dispensing is performed only on a cone, It is also known a device for dispensing pipes comprising a fittingro. The fixed and movable pistons placed between the pistons and the elastic bushing, the ends of the pistons are made conical, the device is equipped with washers placed between the sleeve and the pistons and split jaws 2J. This tool does not have a distribution at the inlet section of the pipe. The main disadvantage of the known device, as well as of all systems with rigid mechanical locking and the accompanying mechanical locking of the mechanical extension of the split rigid elements, such as rings with a cut, split sleeves, is poor quality. In the process of distribution, the rigid elements must simultaneously press against the inner surface of the pipe and at the same time move along the axis. As a result, if no jamming occurs, then there is a loss in axial force due to friction and, consequently, in the radial action of the elastic element pipe. Therefore, the impact on the pipe becomes unstable and unstable. The distribution with the use of mechanical welded pipes is particularly unacceptable, since in some cases the distribution itself is excluded for welds on the weld. In addition, mechanical elements such as crackers, split rings do not eliminate the gap, but convert the annular gap into the slot at the cut, into which it flows out at HIGH pressure and at low pressure; snacks are elastic material of the splice sleeve. The aim of the invention is to expand the technological capabilities of the device by allowing the distribution of pipes with a welded seam. The goal is achieved by the fact that a device containing a power cylinder with a rod, on which a spacer assembly with a conical sleeve and liner is mounted, a distribution sleeve, an elastic sleeve and a cone, is fitted with a sleeve installed with axial displacement on the rod of the power cylinder. between the distributor, the sleeve and the insert, the latter being made in the form of an elastic sleeve fixed relative to the movable sleeve. Fig. 1 schematically shows a device for local distribution of pipes in a tube grid before dispensing} in Fig. 2 - the same, after dispensing. A device for dispensing pipes 1 in the tube sheet 2 of the heat exchanger comprises successively mounted. The power cylinder 3, on the rod 4 of which there are taper bushing 5 connected with it by thread with lock nut 6, movable bushing with collar 7, in the ring slot of which there is fixed an insert in the form of polyurethane bushing 8, distributing bushing 9 and cone 10. Device works as follows. After inserting the tool into the pipe until it stops in the cone 10, the pressure in the power cylinder 3 is supplied to the left cavity. As a result of the oncoming movement of the tapered sleeve 5 and sleeve 8, the latter diverges and presses with a certain force to the pipe 1. Upon further movement of the rod 4, the conical sleeve abuts against the end of the movable sleeve, thereby creating a radial force on the sleeve 8 and starting the distribution of pipe 1 the account of the axial movement of the movable sleeve with the collar 7 towards the rigidly pressed cone 10 at the end of the pipe 1. This axial displacement causes a reciprocating compensator than the force-coupling; due to internal elastic forces and friction against the pipe wall of the sleeve 8, mounted on the movable sleeve by means of an annular groove.

After dispensing, the fluid pressure is supplied to the other cavity of the ram.

By applying oppositely directed forces through the rod 4 and the movable sleeve 7, the conical sleeve 5 is removed from the sleeve 8. The tool is released

1127671. . t

out of the pipe and ready to repeat

cycle.

one

The proposed device in comparison with the known has great technological capabilities, as it provides, and the distribution of pipes with welded pvvom.

Claims (1)

DEVICE FOR DISTRIBUTION OF PIPES in a tube sheet, comprising a power cylinder with a rod, on which a spacer assembly with a conical sleeve and liner is mounted, distributing an elastic sleeve and cone, which is characterized in that, in order to expand its technological capabilities by providing the possibility of distributing pipes with a welded seam, it is equipped with installed with the possibility of movement in the axial direction. a cylinder with a collar located between the distributing sleeve and the liner, the latter being made in the form of an elastic sleeve fixed relative to the movable sleeve. , Fig1 1127671 2