JPS5836240B2 - Corrosion-resistant ring pushing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for pushing a corrosion-resistant ring that is attached to a branch hole when a branch pipe is installed in a cast iron pipe of a water main door.

For the purpose of suppressing rust on the circumferential surface of a branch hole drilled in a water main, there is a known method for fitting a corrosion-proof ring made of a soft non-corrosive material such as copper or lead into the branch hole, but conventional methods have been used exclusively for this purpose. Since a pushing device has not been developed, as shown in Fig. 1, a punching machine A is used to attach a pushing rod to the end of the shaft B, and the outer cylinder 2 is rotated to lower the shaft opening. A corrosion-resistant ring fitted into the branch hole of the main pipe was pushed into the hole, but with a screw-type drilling machine, it took time and effort to lower the shaft end to the branch hole, and the outer tube Since the corrosion-resistant ring is lowered by screwing, it is extremely difficult to tell by feel whether the flange of the corrosion-resistant ring is firmly in contact with the opening surface of the branch hole, and it is not possible to determine the proper insertion state. The following shortcomings were observed.

In view of these circumstances, the present invention aims to provide a corrosion-resistant ring pushing machine that is composed of an outer cylinder and a hollow shaft fitted into the outer cylinder so as to be able to move up and down, maintains a balance with water pressure, and can be easily pushed in by hand. It is something to do.

Hereinafter, the structure of the present invention will be described in more detail based on one embodiment. In Figs. 2 and 3, 1 is an existing water main made of cast iron pipes, and 2 is pre-installed at a main branch branch. The saddle water distribution faucet 3 is a branch hole newly drilled into the main pipe 1 via the water distribution faucet 2 mentioned above.

Further, 4 is a pusher connected to the upright hole 2' of the water faucet 2, 5 is an outer cylinder having an attachment 7 attached to the lower end via a socket 6, and 8 is the socket 6 and the upper end of the outer cylinder. It is a hollow shaft that is inserted into the outer cylinder 5 through a socket 6', and the inside of the outer cylinder 5 is partitioned into an upper chamber a and a lower chamber b by a flange 9 provided around the middle part. through hole 10
The inside of the shaft is made to communicate with the upper chamber a by making a hole therein.

Reference numeral 11 designates a push-in rod fixed to the lower end of the hollow shaft 8. Inside the push rod, an upper end communicates with the hollow shaft 8 and a water passage hole 12 having one to several openings in the peripheral wall is bored, while the tip The circumferential wall has a constant tapered surface, and a stopper 13 made of, for example, a ball and a spring is installed therein, and 14 is a corrosion-resistant ring that is fitted onto the push-in rod 11 and whose lower end is supported by the stopper 13.

In the figure, 8' indicates a handle of the hollow shaft 8, 15 indicates an exhaust port of the lower chamber b penetrated through the socket 6, and 16 indicates a packing.

In the pushing machine of the present invention having the above configuration, when fitting the corrosion-resistant ring 14 into the branch hole 3 of the main pipe 1, first the corrosion-resistant ring 14 is attached to the pushing rod 11 using the stopper 13. After connecting and fixing the pusher main body to the upright hole 2' of the water distribution faucet 2 via the attachment 7, open the water distribution faucet 2 and push the handle 8' of the hollow shaft 8 by hand to release the inside of the main pipe 1. The water enters the hollow shaft 8 through the water passage hole 12 of the push rod 11, and further flows into the upper chamber a of the outer cylinder 5 through the through hole 10 and presses the 7 langes 9. At the same time as the balance against the water pressure applied to the end face of the rod 11 is maintained, the air in the lower chamber b is pushed out from the exhaust port 15 as the flange descends.
The hollow shaft 8 can be easily lowered until the flange of the corrosion-proof ring 14 fitted on the tip of the push rod is engaged with the opening surface of the branch hole 3.

In this case, the operator can reliably grasp whether the corrosion-resistant ring 14 is in close contact with the inner circumferential surface of the branch hole 3 by feeling it through the handle 8', compared to a conventional screw-type drilling machine. Therefore, the corrosion-resistant ring can be properly inserted into the branch hole.

After that, if an impact is applied to the handle 8' from the above-mentioned state, or a load is applied with a pressure pump or a jack, the push rod 11 will be further lowered, and at the same time, its base will move outward from the lower end of the corrosion-resistant ring 14. Since the corrosion-resistant ring 14 is pressed down, the branch hole 3
This is something that will definitely be fixed.

(See Figure 3) As described above, the pushing machine of the present invention has the following features:
By allowing water to pass through the hollow shaft and the upper chamber of the outer cylinder through the push rod, and maintaining a balance with the main water pressure acting on the push rod,
Since it can be easily pushed in by hand, it not only saves the hassle of conventional screwing, but also allows the corrosion-resistant ring to be installed securely. It also has various excellent features such as being lightweight and compact, making it convenient to carry. It is something that

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of the center showing a conventional method using a boring machine, Fig. 2 is a partially cutaway front view showing the corrosion-resistant ring pushing machine of the present invention, and Fig. 3 is a view showing its use. FIG. 3 is a vertical cross-sectional view of the center showing the state. In addition, in the figure 1...Water main, 2...Diversion faucet, 3...Branch hole, 4...Pushing machine, 5
...Outer tube, 6...Socket, 7...
...Attachment, 8...Hollow shaft, 9...
...Flange, 10...Through hole, 11...
... Push rod, 12 ... Water hole, 13 ...
... Stopper, 14... Corrosion-resistant ring.

Claims (1)

[Scope of Claims] 1. A hollow shaft is fitted into an outer shell whose lower end can be freely screwed into an upright hole of a water distribution faucet so that it can be raised and lowered, and a flange provided around the hollow shaft is used to raise and lower the inside of the outer cylinder. The hollow shaft is divided into a chamber and a lower chamber, and the inner space of the hollow shaft communicates with the upper chamber through a through hole, and the lower end thereof is provided with a water passage hole that communicates with the inner space of the shaft, and the tip portion A corrosion-resistant ring pushing machine, characterized in that a pushing rod having a peripheral wall with a constant tapered surface is installed, and a corrosion-resistant ring can be inserted from the lower end of the pushing rod via a stopper. 2. The corrosion-resistant ring pushing machine according to claim 1, wherein the stopper is constituted by a removable ball provided at the lower end of the pushing rod.