SU1496873A1 - Arrangement for expanding pipes in the holes of tube plate - Google Patents

Abstract

The invention relates to the processing of metals by pressure and can be used to fasten pipes in open tube sheets. The purpose of the invention is to reduce energy consumption for distribution of pipes and increase the reliability of the device. The device for dispensing pipes comprises a power cylinder 1 with a piston 2 connected to a spacer cone (K) 3. The distributing elastic element 6 and the supporting washers 7 and the nut 8 that restrict it are mounted on a mandrel 4 connected rigidly to the cylinder 1. In the guide mandrels 4, made in the form of through radial holes, pushers (T) 5 are placed with the possibility of radial movement. On the one hand, they rest on the conical surface of the short-circuit, and on the opposite side, they mate with the distributing elastic element 6. When the piston 2 moves, it acts on T 5, the radial forces of which are perceived by the elastic element 6 and are transmitted as radial distributing forces to the pipe 9 Due to the fact that in the process of distribution, the ends of the elastic element 6 do not move towards one another, the annular section of pipe being subjected to distribution is equal to the securing section, which reduces the energy consumption for distribution. 2 Il.

Description

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The invention relates to the processing of metals by pressure and can be used to secure pipes in the openings of tube sheets,

The purpose of the invention is to reduce energy consumption for distribution of pipes and increase the reliability of the device.

In Fig.1 shows a device for radar pipes, a longitudinal section; figure 2 - section aa in figure 1.

The device for dispensing pipes comprises a power cylinder 1 connected to a piston 2 of a cylinder, an expansion cone 3. A mandrel 4 is rigidly connected to the cylinder 1 of the cylinder. The mandrel 4 is made with radial through holes evenly spaced around each other. pusher 5. Pushers 5 are fixed in guide holes with the possibility of radial movement under the action of the distance cone. 3 and on the opposite side of the mating with the distributing elastic element 6, which is a spacer sleeve made of polyurethane and placed on the outer surface of the mandrel 4. The spacer sleeve 6 is fixed at the ends with support washers 7 and a nut 8. The device is inserted into the pipe 9 tube grate 10.. ,

The device works as follows.

The piston 2 moves to the right, the support cone 3, moving together with the piston 2, acts with its conical surface on the pushers 5, which begin to move radially in the guide holes of the mandrel 4. The radial forces of the cave 5 are perceived by the elastic element 6 and transmitted in the form of radial distributing forces to the pipe 9

When the piston 2 moves to the left after distribution, the radial forces of the pusher 5 are removed from the elastic element 6:. The elastic element 6, under the action of internal elastic forces, restores the original shape, displacing

pushers 5 inwards to the initial position, after which the device is ready to reproduce the process.

Due to the fact that the distributing inelastic element 6 with the support washers 7 and the nut 8 is fixed on the mandrel 4 connected to the cylinder, the ends of the elastic element 6 do not move towards each other during dispensing, the ring section of the pipe subjected to distribution is equal to the securing section, which reduces power consumption for distribution and increase in the period between repairs of the device.

This also contributes to the creation of distributing forces by means of radial forces from the pushers 5 placed in the radial guide mandrels 4 and interacting with the conical surface of the spacer cone 3 and the elastic element 6.

Claims (1)

Invention Formula A device for distributing pipes in the holes of the tube plate, comprising a ram and an associated mechanism for transferring force to a distributing elastic sleeve, as well as a fixing unit for an elastic sleeve in the form of bearing washers and nuts, THAT, in order to reduce energy consumption for distribution of pipes and to increase the reliability of the device, it is equipped with a hollow mandrel rigidly connected with a power cylinder with uniformly arranged circumferentially through radiating holes, the dispensing elastic sleeve is mounted on the mandrel The radial bores, the fixing unit of the elastic bushing are mounted on the mandrel, and the force transfer mechanism from the cylinder to the elastic bushing is made in the form of an expansion cone mounted on the stem of the power cylinder and the followers mounted in the radial holes of the mandrel with the possibility of radial displacement . r- / f Phases l