JPH0160718B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double-pipe rotary joint, and more particularly to a double-pipe rotary joint that can be used in a core metal device for manufacturing resin pipes.

One method for manufacturing resin pipes is to wrap a resin-impregnated fiber band around a cylindrical metal core and then harden it.
That is, once the winding is completed, the resin is cured by heating the core metal while rotating it in a furnace. However, since this resin usually generates heat during gelation during curing, there are problems in that the resin is likely to change in quality due to temperature rise and pinholes are likely to occur due to gasification of the resin. Therefore, it is conceivable to prevent the temperature rise by forming the core metal into a jacket shape and passing cooling water through the jacket. However, in this case, the water supply route and the drainage route are separate, but the core metal that rotates,
There is a problem in that the core metal must be properly connected to the water supply and drainage equipment, and when the connection between the core metal and the water supply and drainage equipment is disconnected after curing is completed, the cooling water remaining in the core metal flows into the furnace. The problem is that it must be prevented from leaking.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a double-pipe rotary joint that functions reliably as a rotary joint having two mutually independent water passages, and that can prevent water from flowing out when the joint is disconnected. The purpose is to

In order to achieve this object, the present invention includes a fixing block to which a first tube and a second tube are fixed together, a fixing block rotatably supported by the fixing block, communicating with the first tube, and a lid. a lid-like main body side inner cylinder having a water inlet penetrated through a wall near the main body side; rotatably supported by the fixed block concentrically with the main body side inner cylinder; and communicating with the second pipe; a main body side outer cylinder capable of forming an annular opening with the main body side inner cylinder; and a main body side outer cylinder that is externally fitted into the main body side inner cylinder so as to be slidable in the axial direction, and a back side inside the main body side outer cylinder. and a slide valve capable of closing both the opening and the water inlet in a sealed state by being biased toward the opening from the joint body, the end surface of which can abut against the slide valve in a sealed state, and , by insertion into the opening,
a header-side inner cylinder that can open both the opening and the water inlet against the biasing force acting on the slide valve and communicate with the main body-side inner cylinder via the water inlet, and a header-side inner cylinder that is concentric with the header-side inner cylinder a header-side outer cylinder that is arranged, is connected to the main body-side outer cylinder in a sealed state as the header-side inner cylinder is inserted into the opening, and is capable of communicating with the main body-side outer cylinder through the opening; A connection header having a connection header is provided.

Therefore, the first water passage can be configured by the first pipe, the main body side inner cylinder, and the header side inner cylinder, and the second water passage can be configured by the second pipe, the main body side outer cylinder, and the header side outer cylinder. Since the main body inner cylinder and main body outer cylinder are rotatably supported by a fixed block, it can function reliably as a rotary joint, and the joint body and connecting header can When the connection is released, the slide valve can prevent water from flowing out of the joint body.

An embodiment of the present invention will be described below. FIG. 1 shows an example of a core metal for manufacturing resin pipes. Reference numeral 1 denotes a core metal main body having a double cylindrical jacket structure, and journals 2 and 3 are concentrically attached inside both ends of the core metal body. Projections 4 from the core body 1 are formed on both journals 2 and 3, and these projections 4 are rotatably supported by rollers or the like, so that the core body 1
It is possible to wrap the resin-impregnated fiber band while rotating.

To explain the jacket structure of the core body 1, the core body 1 has a double cylinder structure having an inner cylinder 6 and an outer cylinder 7, and is divided into a plurality of jacket chambers 9 in the axial direction by a partition wall 8. Each jacket chamber 9 has a water supply port 10 and a drain port 11. Further, within the core body 1, a water supply pipe 12 and a drain pipe 13 to each jacket chamber 9 are supported by a support member 14. 15 is a water supply pipe 12 and each water supply port 10
16 is a continuous water supply hose, and 16 is each drain port 1
A drain hose from 1 is connected to a drain pipe 13 via a valve 17. The water supply pipe 12 and the drain pipe 13 are communicated with a joint body 18 of the double pipe rotary joint according to the present invention installed in the journal 3, and a connection header (described later) from outside the figure is connected to the joint body 18. By doing so, water can be passed into each jacket chamber 9 while rotating the core body 1.

Next, the double pipe rotary joint according to the present invention is shown in FIG.
This will be explained in detail based on FIG. FIG. 2 shows the joint body 18 in detail. Here, 1
9 is a fixed block attached to the mounting plate 20 in the journal 3, and includes the above-mentioned drain pipe 13 as the first pipe and the above-mentioned water supply pipe 12 as the second pipe.
Both are fixed. Inside the fixed block 19, a main body inner cylinder 22 is rotatably supported via a bearing 21, and this main body inner cylinder 22 is communicated with the drain pipe 13. On the other hand, 23 is a main body side outer cylinder arranged concentrically with the main body side inner cylinder 22,
This main body side outer cylinder 23 is also rotatably supported by the fixed block 19 via a bearing 24. 25 and 26 are oil supply pipes to each bearing 21 and 24. According to such a configuration, the outer cylinder 23
An annular space 27 is formed between the inner cylinder 22 and the inner cylinder 22, and this annular space 27 is communicated with the water supply pipe 12 via a communication passage 28 in the fixed block 19. A fixing member 29 fixes the inner tube 22 and the outer tube 23 to each other so that they can rotate together, and has radial ribs 30 at appropriate positions in the circumferential direction.

An annular opening 31 is formed between the tips of the main body side outer cylinder 23 and the main body side inner cylinder 22, and the main body side inner cylinder 2
The tip of 2 is closed with a lid part 32. Furthermore, a plurality of water holes 33 are penetrated in the wall portion of the inner cylinder 22 in the vicinity of the lid portion 32 in the circumferential direction. Reference numeral 34 denotes a slide valve that is fitted onto the inner cylinder 22 on the distal side of the fixing member 29 so as to be slidable in the axial direction, and has a cylinder part 35 and a flange part 36. The member 29 is biased toward the opening 31 by a spring 37 that is engaged with the rib 30 of the member 29 . The collar portion 36 of the slide valve 34 is connected to the spring 3
The valve seat 38 provided on the inner surface of the distal end of the outer cylinder 23 is brought into contact with the urging force 7, and the opening 31 can be closed in a sealed state. In addition, the brim portion 36
When the valve seat 38 comes into contact with the valve seat 38, the cylindrical portion 35 is configured to be able to close the water inlet 33 as well. 39,4
0 is a sealing material that seals between the cylindrical portion 35 and the water inlet 33, and the sealing material 40 also has a sealing function when closing the opening 31 with the flange portion 36.

FIG. 3 shows the connection header 41 connected to the joint body 18 in detail. Here, 42 is a header-side inner cylinder whose end face 44 can come into contact with a valve seat 43 made of an annular plate provided on the collar 36 of the slide valve 34 in a sealed state, and communicates with a header-side drain pipe 45. . Further, 46 is a header side outer cylinder arranged concentrically with the header side inner cylinder 42, and the main body side outer cylinder 2.
Due to the effect of a sealing material 47 provided on the outer periphery of the main body side outer cylinder 23, the main body side outer cylinder 23 can be fitted onto the outer cylinder 23 in a sealed state. This header side outer cylinder 46 communicates with a header side water supply pipe 48.

49 is a clamp device for holding the connection header 41 on the joint body 18, and is a clamp cylinder having an engaging pawl 51 that is reciprocated in the axial direction by the cylinder body 50 and pivoted around the axis. It is provided at an appropriate position in the circumferential direction on the outer surface of the tip portion of the header side outer cylinder 46. As shown in FIG. 2, when the header side outer cylinder 46 is fitted onto the main body side outer cylinder 23, the engaging claw 51
The connecting header 41 is held in the joint body 18 by engaging with the engagement stepped portion 52 of the main body side outer cylinder 23 .

The connecting header 41 is configured to be pressed against the joint body 8 by the action of a cylinder device (not shown). In FIG. 8, reference numeral 53 designates an operating rod of the cylinder device, which is connected to the connecting header 41 via a spherical bearing 54 and a centering spring 55. Therefore, even if there is some misalignment between the connection header 41 and the joint body 18, this can be absorbed.

In such a configuration, when manufacturing the resin tube 56, the core body 1 is slowly rotated,
A resin-impregnated fiber band is spirally wound around it. When the winding is completed, the core body 1 is carried into a furnace and is slowly rotated to harden the resin.

Here, when the connection header 41 is pressed against the joint body 18, the header side inner cylinder 42
The end face 44 of the slide valve 34 contacts the valve seat 43 of the slide valve 34 in a sealed state, and the header side inner cylinder 42
This means that the slide valve 34 is pushed to the rear side against the urging force of. As a result, the opening 31 and the water inlet 3
3 are both opened, and the header side inner cylinder 42 connects to the drain pipe 13 through the water inlet 33 and the main body side inner cylinder 22.
will be communicated to. Further, the header side outer cylinder 46 is fitted onto the main body side outer cylinder 23 in a sealed state, and is passed through the water supply pipe 12 via the opening 31, the annular space 27 in the main body side outer cylinder 23, and the communication passage 28. Then, the clamp device 49 operates, and the connection header 41 connects to the joint body 18.
will be reliably maintained.

The above operation allows cooling water to flow into the jacket chamber 9 of the rotating core body 1, effectively preventing a harmful temperature rise due to heat generated by the resin during curing.

Once the resin pipe 56 has hardened, the clamp device 49
Release the operation and attach the connecting header 41 to the joint body 18.
extract from. Then, the slide valve 34 is moved by the spring 37.
The valve seat 38 is brought into contact with the valve seat 38 again by the urging force of the opening 3.
1 and the water inlet 33 are closed. Therefore,
The jacket chamber 9 of the core body 1 and the water supply and drainage pipes 12, 1
Even if cooling water remains in the core body 3, it can be prevented from flowing into the furnace or the like, and the core body 1 with the resin pipe 56 can be carried out without any trouble. Another core body 1 is carried into the furnace, and cooling water is passed through it in the same manner as above.

In addition, in the above embodiment, the case where the double pipe type rotary joint according to the present invention is applied to a core metal device for manufacturing resin pipes has been explained, but the present double pipe type rotary joint can also be applied to other appropriate devices. be.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a cross-sectional view of the core body to which the joint body is attached, FIG. 2 is a detailed cross-sectional view of the joint body, and FIG. 3 is a detailed cross-sectional view of the connecting header. It is. 1... Core metal body, 12... Water supply pipe (second pipe),
13... Drain pipe (first pipe), 18... Joint body,
19... Fixed block, 21, 24... Bearing, 22... Body side inner cylinder, 23... Body side outer cylinder,
31...Opening, 32...Lid, 33...Water port,
34...Slide valve, 35...Cylinder part, 36...Brim part, 37...Spring, 38...Valve seat, 42...Header side inner cylinder, 43...Valve seat, 44...End face, 46
... Header side outer cylinder, 49 ... Clamp device, 56
...Resin pipe.

Claims (1)

[Claims] 1 A fixed block to which a first pipe and a second pipe are both fixed; a water inlet that is rotatably supported by the fixed block, communicates with the first pipe, and has a water inlet passing through a wall near the lid; a lid-shaped body-side inner cylinder, which is rotatably supported by the fixed block concentrically with the body-side inner cylinder;
a main body side outer cylinder that communicates with the pipe and is capable of forming an annular opening with the main body side inner cylinder; A joint body having a slide valve capable of closing both the opening and the water inlet in a sealed state by being biased toward the opening from the back side of the side outer cylinder, and an end face of the joint body is in a sealed state with the slide valve. By inserting it into the opening, it is possible to open both the opening and the water inlet against the biasing force used for the slide valve, and it is also possible to communicate with the inner cylinder on the main body side through the water inlet. a header-side inner cylinder arranged concentrically with the header-side inner cylinder, and connected to the main body-side outer cylinder in a sealed state as the header-side inner cylinder is inserted into the opening;
A double-pipe rotary joint characterized in that a connecting header is provided which has a header-side outer cylinder that can communicate with the main body-side outer cylinder through the opening.