JPH09209419A - Branch saddle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a packing loaded section of a saddle hold elastic force to increase press-contacted force to the packing and to promote sealing efficiency. SOLUTION: One saddle 11 loading a packing is formed of an elastically deformable hard plastic, and the base section 11b of a corporation cock mounting section 11a is expanded inward to reduce the diameter. By the constitution, the base section 11b is elastically deformed outward and press-contacted to a fluid pipe firmly when both saddles 11 and 6 are fastened to the fluid pipe. By this constitution, the packing is always pushed to promote sealing efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch saddle device used when a branch pipe is attached to a fluid pipe such as water supply or sewer.

[0002]

2. Description of the Related Art A conventional branch saddle device of this type is known, for example, as shown in FIG.

In this conventional branch saddle device, a pair of upper and lower saddles in the shape of a half cylinder are fastened by bolts 3 and nuts 4 to the outer peripheral surface of a water main 2 having a branch hole 1 formed in the upper portion. 5, 6 and a water faucet 8 screwed into a female screw hole 7 formed on the water faucet mounting part 5a on the upper part of the upper saddle 5 and coaxial with the branch hole 1, and a water main at the water faucet mounting part 5a. In the annular recess 9 at the opening on the pipe 2 side, there is a packing 10 mounted so as to surround the periphery of the branch hole 1.

[0004]

The upper and lower saddles 5 and 6 of the branch saddle device as described above are usually formed of ductile cast iron or stainless steel. Since the saddle made of such a material has a poor elastic force, if the pressure contact force of the packing 10 is deteriorated due to deterioration over time, its sealing property is impaired, and water leakage or tap water contamination is caused.

Further, in the water main 2 made of ductile cast iron,
When the saddles 5 and 6 made of stainless steel are attached, a potential difference may be generated and the contact surfaces of the two may be corroded. When this corrosion occurs in the mounting portion of the packing 10, the sealing performance of the packing 10 is impaired. Further, when the contact surfaces of the saddles 5 and 6 are deteriorated in adhesion due to corrosion or the like, when the saddles 5 and 6 and the water faucet 8 are shaken, the saddles 5 and 6 are rotated in the circumferential direction and the packing 10 is displaced. There is also a risk that the sealing effect will be lost due to the above.

The present invention has been made in view of the above-mentioned problems, and by making the packing mounting portion of the saddle have an elastic force, the pressure contact force of the packing is increased and corrosion is generated in the packing mounting portion. It is an object of the present invention to provide a saddle branching device that is capable of preventing and significantly improving the sealing property.

[0007]

In order to achieve the above-mentioned object, the present invention provides a branch hole bored in the fluid pipe in any of the divided saddles which are fastened to the outer peripheral surface of the fluid pipe. Between the fluid pipe and the saddle is provided with a water faucet mounting portion which can communicate with each other, and a sealing member mounted between the opening of the water faucet mounting portion on the fluid pipe side and the periphery of the branch hole in the fluid pipe. In the branch saddle device adapted to maintain the sealing property of, by forming at least the vicinity of the water faucet mounting portion of the saddle with a plastic elastically deformable in the radial direction, and bulging the portion inward. The inner diameter of the fluid pipe is reduced when it is not fastened to the fluid pipe.

It is preferable that the divided saddle having the water faucet mounting portion is integrally formed of plastic, and the base of the water faucet mounting portion is made thin and bulges inward.

The water faucet mounting portion is made of plastic and is fitted into the mounting hole of the saddle body, and the flange portion connected to the opening on the fluid pipe side of the water faucet mounting portion is provided with a seal member. It is preferable that it can be bent in the diameter reducing direction in a mounted state so as to be able to contact the inner surface of the saddle body.

The plastic is preferably glass fiber reinforced plastic or carbon fiber reinforced plastic.

According to the present invention, with the above-mentioned structure, when the saddle is fastened to the fluid pipe, the portion which is inwardly expanded and reduced in diameter is elastically deformed in the outward direction (eccentric direction). Press strongly against the fluid pipe. As a result, the seal member is constantly pressed, and the sealability is improved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The same members as those in the above-mentioned conventional example will be described with the same reference numerals.

FIG. 1 and FIG. 2 show a first embodiment of the present invention, showing the states before and after mounting on the water main 2, respectively.

In FIG. 1, the lower saddle 6 is made of ductile cast iron or stainless steel as in the conventional case. The upper saddle 11 is made of glass fiber reinforced plastic (FRP) or carbon fiber reinforced plastic (CFR).
P) and the like, and the base portion 11 of the water faucet mounting portion 11a
b is thin-walled and bulges inward to slightly reduce the inner diameter of that portion.

As shown in FIG. 2, upper and lower saddles 11 and 6 are provided.
The ring-shaped recess 9 formed in the upper saddle 11 with the packing 10
When the upper saddle 11 is attached and fastened to the water mains 2 with the bolts 3 and the nuts 4, the upper saddle 11 corresponds to the faucet mounting portion 11a.
The base portion 11b of (1) is elastically deformed in the outward direction (eccentric direction) so that the base portion 11b comes into close contact with the water main 2. At this time, the base 11b
Is strongly pressed against the water mains 2 in an attempt to restore downward, so that even if the pressure contact force of the packing 10 decreases due to deterioration over time, the packing 10 will always be pressed, and therefore its sealing property will be improved. There is no risk that the water will be damaged and water leakage will occur.

Further, since the upper saddle 11 is made of plastic, there is no risk of corrosion, and the sealability is impaired by this, and the adhesion to the water mains 2 is reduced, so that the saddles 11 and 6 are circumferentially arranged. There is no possibility that the packing 10 will be displaced and the packing 10 will be displaced.

Further, when an external force such as a vibration is applied to the water faucet 8 or the like attached to the upper saddle 11, the base 11b is slightly elastically deformed and absorbs the force, so that the saddles 11 and 6 are positioned. It is possible to prevent deviation.

FIG. 3 shows a second embodiment of the present invention. In this embodiment, the upper saddle 11 is composed of two members, a saddle body 12 and a water faucet mounting portion 13, and the water faucet mounting portion 13 is provided.
Is fitted into a mounting hole 12a at the center of the upper portion of the saddle body 12. The saddle body 12 is made of ductile cast iron or stainless steel, and the water faucet mounting portion 13 is made of glass fiber reinforced plastic or carbon fiber reinforced plastic.

The locking flange portion 13a at the lower portion of the water faucet mounting portion 13 is bent into a substantially arcuate arcuate shape to be reduced in diameter, and is closely packed in an annular recess 12b formed on the inner surface of the saddle body 12. It is designed to be fitted.

When the saddle 11 of this embodiment is fastened to the main water pipe 2, the outer peripheral portion of the engaging flange portion 13a is forcibly elastically deformed upward as shown in FIG. It will be in pressure contact with. Therefore, as in the first embodiment, even if the pressure contact force of the packing 10 mounted in the annular recess 9 is reduced, the sealing performance is not impaired.

FIG. 5 shows a third embodiment of the present invention. In this embodiment, the locking flange portion 13a of the water faucet mounting portion 13 similar to that of the second embodiment is reduced in diameter in a substantially horizontal arc shape, and when it is fastened to the water mains 2, the locking flange portion is secured. The inner peripheral portion of 13a is elastically deformed upward so as to come into pressure contact with the water mains 2. Also in this embodiment, the same operational effects as those of the above-mentioned embodiment can be obtained.

The present invention is not limited to the above embodiment.

For example, in the second and third embodiments described above,
The saddle body 12 may also be formed of glass fiber reinforced plastic or carbon fiber reinforced plastic.

[0024]

According to the present invention, the following effects can be obtained.

(A) When the saddle is fastened to the fluid pipe, the inwardly bulged portion is elastically deformed outward and strongly comes into pressure contact with the fluid pipe. Even if the value is decreased, the high sealing property is maintained and the fluid can be prevented from leaking.

(B) Further, when an external force such as a vibration acts on the water faucet mounting portion, it is slightly deformed and absorbs the force, so that the saddle may be displaced with respect to the fluid pipe. Absent.

(C) According to the second aspect of the invention, the contact portion between the saddle on which the seal member is mounted and the fluid pipe is prevented from corroding due to a potential difference or the like, so that the sealing performance is improved. There is no fear of being damaged, and it also reduces the weight of the saddle.

(D) According to the third aspect of the present invention, it is possible to mount various water faucet having different caliber and the like only by changing the design of only the water faucet mounting portion.

(E) According to the invention described in claim 4, since the saddle has a mechanical strength comparable to that of ordinary ductile cast iron, there is no fear of damage even when buried in the soil. .

[0030]

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a first embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing the same at the time of fastening to a water main.

FIG. 3 is a partially cutaway front view of an upper saddle showing a second embodiment of the present invention.

FIG. 4 is a partially cutaway front view of the same when it is fastened to a water main.

FIG. 5 is a partially cutaway front view of an upper saddle showing a third embodiment of the present invention.

FIG. 6 is a partially cutaway front view of a conventional branch saddle device.

[Explanation of symbols]

 1 Branch Hole 2 Water Main Pipe (Fluid Pipe) 3 Bolt 4 Nut 5 Upper Saddle 6 Lower Saddle 7 Female Threaded Hole 8 Water Stopper 9 Annular Recess 10 Packing (Seal Member) 11 Saddle Body 11a Water Stopper Attachment 11b Base 12 Top Saddle 12a Mounting hole 12b Annular recess 13 Water faucet mounting part 13a Locking flange part

Claims (4)

[Claims] 1. A water faucet mounting portion, which is capable of communicating with a branch hole formed in the fluid pipe, is provided in one of the divided saddles fastened to the outer peripheral surface of the fluid pipe, and the water diversion is provided. A branch saddle device configured to maintain a sealing property between a fluid pipe and a saddle by a seal member mounted between an opening on the fluid pipe side of a plug mounting portion and a periphery of a branch hole in the fluid pipe, wherein the saddle At least near the water faucet mounting part is formed of a plastic that can be elastically deformed in the radial direction, and the part is bulged inward so that the inner diameter is reduced when it is not fastened to the fluid pipe. A branch saddle device characterized in that 2. The divided saddle having a water faucet mounting portion is integrally formed of plastic, and the base of the water faucet mounting portion is made thin to bulge inward. Branch saddle device described. 3. The sealing member is formed by forming the water faucet mounting portion from plastic, fitting the mounting hole of the saddle body, and connecting the flange portion connected to the opening on the fluid pipe side of the water faucet mounting portion. The branch saddle device according to claim 1 or 2, wherein the branch saddle device is bent in a diameter-reducing direction in a mounted state so that it can be brought into contact with an inner surface of the saddle body. 4. The branch saddle device according to claim 1, wherein the plastic is glass fiber reinforced plastic or carbon fiber reinforced plastic.