JPS59121816A - Tightening device of wiring - Google Patents

Abstract

PURPOSE:To keep the uniform pressure applied to a wiring so as to make the wiring being in close contact with the inside surface of a cylinder by applying fluid pressure upon a hose wound on outer surface of the cylinder thereby pressing an adjacent cover plate externally in radial direction to tighten the wiring wound inside of the cylinder in radial direction. CONSTITUTION:A conpresser 14 is actuated to supply air pressure to a hose 11 thereby expanding the hose 11 and a cover plate is pressed externally in radial direction and the cover plate 19 presses the wiring 7 against inside surface of a cylinder 8. On the wiring 7 and inside surface of the cylinder 8, insulating substances coated with adhesive are wound so that this adhesive flows out by heating and hardens by heating. Namely, to select the heating temperature and the air pressure for the hose 11 according to the properties of the adhesive properly enables to obtain the tightening force suitable for the properties of the adhesive and required by the device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a winding tightening device for tightening a winding wound on the inner surface of a cylindrical body, such as a superconducting coil.

[Technical background of the invention]

As shown in Fig. 1, this type of winding tightening device consists of a cylindrical body 2 with screws 1 formed at both ends, and a cylindrical body 2 with multiple stages axially and at intervals circumferentially on the outer peripheral surface of the cylindrical body 2. A large number of tightening devices 3 arranged side by side, and a backing plate 4 having an overall cylindrical shape, which is divided into a number corresponding to the number of tightening devices 3 arranged in the circumferential direction and connected to each of the tightening devices, It has clamping plates 6a and 6b attached to the end of the cylindrical body 2 via screws 5, and the clamping plate 6a is removed from the cylindrical body 8 with the winding 7 wound on the inner surface. Insert the tightening plate 6a
are tightened in the axial direction by attaching them via the screws 5, and the caul plate 4 is pressed against the winding 7 by means of a tightening device 3, for example a hydraulic or pneumatic cylinder, to perform radial tightening, and then the winding is tightened. An adhesive (not shown) provided on the inner surface of the cylindrical body 8 is made to heat cure an insulator (not shown) coated with IC.

[Problems with background technology]

However, in the above-mentioned type of winding tightening device, the structure of the tightening device is complicated, and a large number of tightening devices must be arranged on the circumference of the cylindrical body and in the axial direction. It is difficult to apply pressure uniformly in the axial direction, and therefore it is difficult to bring the windings into complete contact with the cylindrical body.

[Purpose of the invention]

The present invention was made in view of the above points, and it maintains a uniform pressing force on the winding, ensures complete adhesion of the winding to the inner surface of the cylindrical body, and reduces assembly man-hours during manufacturing. It is an object of the present invention to provide a winding tightening device that can reduce manufacturing costs.

[Summary of the invention]

It is an object of the present invention to apply fluid pressure to a hose wound on the outside surface of a cylindrical body to inflate the hose and press a caul plate adjacent to the hose radially outward. This is achieved by a winding delivery device that pressurizes the wire toward the inner surface, tightens the winding in the radial direction, and fixes the winding in close contact with the inner surface of the cylindrical body.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 3, the code 10 is 20 to 10 from the inner diameter of the winding 7.
It is a cylindrical body with a small diameter of 0φ, and on the outer peripheral surface of this cylindrical body 10, there is a hose 11 having high pressure and heat resistance, which is made by impregnating a tube made of glass fiber with ethylene propylene rubber and filling the mth hole. It is wound into a spiral shape. One end of the hose 11 is closed, and a valve 12 is provided at the other end.
vacuum pump 13 and compressor 14 in parallel via
is connected.

On the other hand, a fixing plate 16 of a tightening device 15 is fixed to one end side of the cylindrical body 10, and this fixing plate 16 is attached to the end surface of the cylindrical body 8 with the winding 7 wound thereon via a port 17. It is ready to be installed.

That is, a cylindrical body 10 is erected at the center of the fixed plate 16, and this cylindrical body 10 is arranged concentrically with the cylindrical body 8, and an annular space 18 is defined between the wound hose 11 and the winding 7. has been completed. In the annular space 8, there are four cylindrical bodies.
A backing plate 19, 19, . . . divided into eight equal parts is inserted.

On the other hand, a movable plate of the tightening device 15 is arranged on the other edge side of the cylindrical body lO, and this movable plate has a bellows 21,
It is supported by a flange 22 via 21.

The flange 22 is attached to the end surface of the cylindrical body 8 via studs 23 and nuts 24.

Next, the effect will be explained.

First, as shown in FIG. 3, with the air removed from the hose 11, a cylindrical body 8 with the winding 7 wound around the inner surface of the cylindrical body 10 is prepared.
and fix the fixing plate 16 to the cylindrical body 8 via bolts 17.

Next, an annular space 18 formed between the winding 7 and the hose 11
Then, the backing plate 19 is inserted from the open end side so as to form a cylindrical shape as a whole. Then, a movable plate 20 is placed so as to be in contact with the end face of this backing plate 19, a flange 22 is inserted into a stud 23 via a bellows 21, and a nut 24 is screwed onto the stud 23 to make the movable plate 20 movable. The plate 20 is attached to the cylindrical body 8.

This completes the preparation, and the assembly is placed in a drying chamber (not shown), the whole is heated, and the compressor 14 is operated to supply air at a pressure of about 1 to 3 kg/d to the hose 11. supply Then, the hose 11 swells as shown in FIG. 4, and the caul plate 19 is pressed radially outward, so that the caul plate 19 presses the winding 7 against the inner surface of the cylindrical body 8. Since an insulator coated with an adhesive (not shown) is wound around the inner surfaces of the winding 7 and the cylindrical body 8, the adhesive flows out by heating and is cured by heating. That is, by appropriately selecting the heating temperature and air pressure to the hose 11 according to the characteristics of the adhesive, it is possible to obtain a tightening force that matches the characteristics of the adhesive and is required by the device.

When the temperature of the winding 7 reaches the specified temperature, the compressor 14 is further operated to increase the pressure to the hose 11 to maintain the specified pressure, and at the same time, the bellows 2 Increase the pressure of winding 7
Apply a specified axial pressure to the That is, the pressure of the hose 11 and the bellows 21 can be varied according to the temperature change of the winding 7. For example, until the temperature of the winding 7 reaches 100°C, the pressure of the hose 11 and the bellows 21 is kept between the specified level and
When the pressure reaches 100° C., the pressure of the hose 11 and the bellows 21 is alternately increased to tighten the winding in both the axial and radial directions. Then, each time the temperature of the winding increases by 10℃, repeat tightening in the axial and radial directions several times, gradually increasing the tightening pressure, and when the temperature of the winding reaches the specified temperature, tighten the hose and bellows. Apply specified pressure. By heating and curing the adhesive under this condition, the winding 7 is tightly fixed to the inner surface of the cylindrical body 8.

FIG. 5 shows another embodiment of the present invention. In this embodiment, the means for tightening the winding 7 in the axial direction is an annular shape having a protrusion that touches the side surface of the winding 7. Piece 31
This is done using a device having a tightening jig 32 that comes into contact with this annular piece 31, and a hydraulic cylinder device connected through a coupling shaft 331C of this tightening jig 32, and the annular piece is tightened by the operation of the hydraulic cylinder device. Move up and down,
Tighten the winding 7 in the axial direction.

In the above example, air was used as the pressurizing medium for the hose, but hydrogen gas, argon gas, water,
Of course, the same effect can be obtained by using oil.

〔Effect of the invention〕

As described above, according to the present invention, since the winding can be brought into close contact with the inner surface of the cylindrical body with uniform force, it is possible to manufacture an inner winding with good heat transfer, and it is possible to manufacture the inner winding with good heat transfer. The structure is simpler than that, and the labor required for installation is reduced.
Effects such as being able to obtain an inner winding with low manufacturing cost are achieved.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional winding tightening device, Fig. 2 is a sectional view taken along the line H-H in Fig. 1, and Fig. 3 is a state in which the hose of the winding tightening device according to the present invention is shrunk. 4 is a sectional view showing the hose of the winding tightening device in an inflated state, and FIG. 5 is a diagram showing another embodiment of the industrial water invention. 7...Winding , 8... Cylindrical body, 1o... Cylindrical body, 1
DESCRIPTION OF SYMBOLS 1... Hose, 16... Fixed plate, 18... Annular space, 19... Back plate, 20... Movable plate. tl Figure L2 Figure East 3 Concave 4 Figure L5 Lower 0

Claims (1)

[Claims] A cylindrical body with a hose made of heat-resistant material wound around its outer circumferential surface, a backing plate placed on the outer surface of the hose, and a cylindrical body connected to the hose to apply fluid pressure inside the hose so as to tighten the line in the radial direction. A winding tightening device characterized by: