JPH0658473A - Pipe joint - Google Patents

Abstract

PURPOSE:To dispense with any bolt clamping work by inserting each end of pipes to be connected into a sleeve pipe for butting, pressing a sheet of corrugated packing installed on a pipe outer circumferential surface from the front and the rear, and making this packing stuck fast to the pipe and the sleeve pipe, in a simplified joint for a water pipe. CONSTITUTION:Two pipes 1, 2 are inserted into a sleeve pipe 3 from both ends, and these ends are butted with each other. Each packing deformation keeping stopper 9 is locked to both ends of this sleeve pipe 3 by means of welding (13) for packing deformation stopper fixation. Each slide type packing deformation keeping ring 6 fixed by means of welding (12) for clawing ring fixation is externally installed in both ends of these pipes 1 and 2. In addition, each ring stopper 10 is locked to the pipes 1, 2 by means of locking welding (11). In succession, each corrugated packing 4 is installed in space between two packing rings 6 and 7, and these pipes 1, 2 are thrust in till the stopper 10 is engaged with a claw 5, and the packing 4 is pressed from the front and the rear for deformation, thus it is stuck fast to the pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water pipe simple joint.

[0002]

2. Description of the Related Art Conventionally, main pipes for water distribution pipes are welded every several meters by joints or welding and buried underground.
Japanese Unexamined Patent Publication No. 59-73693 discloses a water shutoff device in which a pivot is provided in the central portion of an upper and lower split type so that it can be opened and closed in the front-rear direction. At the same time, the packing material can be effectively pressed even at the welded portion.

Japanese Utility Model Laid-Open No. 57-67185 discloses that
Ideal for connecting rigid pipes such as cast iron pipes and soft pipes such as synthetic resin pipes, steel pipes, etc., it has an excellent sealing effect with regard to the structure of the joint part that is easy to manufacture and easy to connect, and it can be used for internal fluid pressure. On the other hand, the pipe joint has a self-sealing effect and is free from deterioration of packing.

[0004]

As described above, Japanese Patent Laid-Open No. 59-73693, which is a conventional technique, can be opened and closed by providing hinges around the upper and lower semi-circular plates constituting the left and right pressing plates. In this water shut-off device, two sets of packing holding plates are opposed to each other on the left and right, and packing is installed between the packing holding plates facing each other. Since it is a packing pressing method and requires bolt tightening work, it takes time for construction. Further, also in Japanese Utility Model Laid-Open No. 57-67185, similarly to the above, the bolt tightening work is required and the construction takes time.

[0005]

[Means for Solving the Problems] As a result of the inventors' diligent efforts to solve the above-mentioned problems, as a result, welding and bolting work at the time of construction are not necessary, and the stopper is pushed until it hits the claw. The purpose of this is to propose a joint that is extremely easy to construct because it can provide waterproofness. The gist of the invention is as follows: (1) The ends of the two pipes to be connected are inserted into the sheath pipes and abutted against each other, and the corrugated packing provided on the outer peripheral surface of the pipes is pressed from the front and the back. A pipe joint characterized in that the packing is brought into close contact with a pipe and a sheath pipe to obtain a waterproof property. (2) In the joint structure using the corrugated packing described in (1), by providing a stopper to hold the deformation of the packing, welding at the time of construction and bolt tightening work are not required at all, and the stopper is attached to the claw. This is a pipe joint characterized in that water proofing can be obtained simply by pushing in the pipe.

The present invention will be described in detail below with reference to the drawings. FIG. 1 is an overall sectional view of a pipe joint according to the present invention. In FIG. 1, in order to connect the main pipes 1 and 2, the ends of the two main pipes are inserted into the sheath pipe 3 and butted.
In this case, the packing deformation holding stoppers 9 are fixed to both ends of the sheath tube 3 by the packing deformation holding stopper fixing welding 13. On the other hand, at both ends of the main pipes 1 and 2, the hooking ring 5 is welded by the hooking ring fixing welding 12.
The slide-type packing deformation holding ring 6 to which is fixed is externally mounted. The ring stopper 10 is fixed to the main pipe by the ring stopper fixing welding 11.
The movement of the packing deformation holding ring 6 in the pipe length direction is suppressed.

Next, the packing 4 is mounted between the packing deformation holding ring 6 of the main pipes 1 and 2 and the packing pushing ring 7. As a result, it is possible to prevent the packing from coming out of the gap between the main pipe 2 and the packing pushing ring 8 when the main pipe is pushed, and to make the gap between the main pipe 2 and the packing pushing ring 8 rough. Further, by fixing the packing pushing ring 8 to the sheath pipe 3 by the ring fixing welding 14, the movement of the slide type packing pushing ring 7 which is mounted on the tip ends of the main pipes 1 and 2 in the pipe length direction is prevented. Hold down. In this state, the main pipes 1 and 2 are inserted into the sheath pipe 3, and the packing deformation holding stopper 9
Push in the main pipe until it hangs on the nail ring 5. Once the stopper is hooked on the pawl, the amount of deformation of the packing does not change even if the main pipe moves, so that water stopping performance is always ensured. That is, the seal between the pipe walls of the main pipe and the sheath pipe is held by the repulsive force of the packing.

As described above, since the waterproof property is secured only by pushing the main pipe until the stopper hits the claw, the welding and bolting work at the time of construction are not required at all, and the construction is extremely easy. In addition, by providing a gap between the main pipe, the sheath pipe and the ring, it is possible to improve flexibility and reduce the accuracy of main pipe insertion during construction. FIG. 2 is a sectional view showing a packing shape in a pressed state. As shown in Fig. 2, this packing has a water blocking mechanism that pushes out a corrugated packing from the left and right to bend the packing in the vertical direction and obtain a water blocking effect by closely contacting the main pipe and the sheath pipe. is there.

[0009]

As described above, the pipe joint according to the present invention does not require welding or bolting work at the time of construction as in the conventional construction, the construction is extremely easy, and even if the main pipe moves. Since the amount of deformation of the packing does not change, it is possible to always ensure stable water stoppage. Further, by providing a gap between the main pipe and the sheath pipe and ring, flexibility is improved, and at the same time, the main insertion accuracy during construction can be relaxed, which is an extremely excellent effect. Is played.

[Brief description of drawings]

FIG. 1 is an overall sectional view of a pipe joint according to the present invention.

FIG. 2 is a sectional view showing a packing shape in a pressed state.

[Explanation of symbols]

 1, 2 Main pipe 3 Sheath pipe 4 Corrugated packing 5 Claw hooking ring 6 Packing deformation holding ring 7 Packing pressing ring (sliding type) 8 Packing pressing ring (fixed type) 9 Packing deformation holding stopper 10 Ring stopper 11 Welding for fixing ring stopper 12 Welding for fixing ring for hook 13 Welding for fixing packing deformation holding stopper 14 Welding for ring fixing

Claims (2)

[Claims] 1. The end portions of two pipes to be connected are inserted into a sheath pipe and abutted against each other, and a corrugated packing provided on the outer peripheral surface of the pipe is pressed from the front and the rear to thereby bring the packing into the sheath pipe. A pipe joint that is tightly adhered to and obtains waterproofness. 2. The joint structure using the corrugated packing according to claim 1, wherein a stopper is provided for holding the deformation of the packing, so that welding and bolting work at the time of construction are not required at all, and the stopper is a nail. A pipe joint characterized in that water resistance is obtained simply by pushing the pipe in until it hangs.