JP2000027245A - Snap tap with saddle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a snap tap with a saddle capable of preventing electrolytic corrosion between dissimilar metals by ensuring insulation of a joint between a bolt and a nut with which the flange and the saddle of the snap tap are joined to each other. SOLUTION: A snap tap 8 is fixed to a saddle 2 covered with an insulating coating 5 with a bolt 9. In this case, the flange 11 of the snap tap 8 is superposed on a saddle supporting portion 6 having an through-hole 29 larger in diameter than the screw portion 9a of the bolt 9 and the snap tap 8 and the saddle 2 are fixed together with an insulating material 14 interposed between the bolt 9 or the nut 31 on the saddle 2 side and the saddle 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water tap with a saddle for branching from a main pipe of a water supply pipe to a water supply branch pipe.

[0002]

2. Description of the Related Art Usually, when branching a water supply main pipe from a water main, a water tap is attached to a branch position of the water main with a saddle, and then a water tap is attached to a water tap with a piercing tool fixed to a mounting hole of the water tap. The branching operation is completed by inserting the anticorrosive sleeve into this hole, covering the mounting opening, and opening the water stop mechanism of the water tap.

[0003] The method of connecting the water faucet and the saddle includes:
There are a flange type and a screw type, and in the case of the former flange type, a flange of a water faucet formed of a material such as bronze or stainless steel and a support portion of a cast iron saddle are overlapped, and this flange portion is Sandwiched with bolts or nuts,
Or, it is connected by screwing, on the other hand, the outer peripheral surface of the saddle is coated with a resin powder to prevent electrical conduction at the contact surface between the water faucet and the saddle, and to prevent dissimilar metal in this part Electric corrosion is prevented.

[0004]

However, for example, a water faucet made of bronze and a saddle made of cast iron are sandwiched between stainless steel bolts, or a stainless steel bolt is screwed into a saddle made of cast iron to form a water faucet. Since the flange and the saddle are fixed, the dissimilar metals at the site joined by bolts are electrically conductive, and the potential difference between the dissimilar metals causes
There is a possibility that a base metal having a low potential may be corroded. Therefore, there has been a strong demand for the development of a technique for eliminating electrical conduction at a bolt portion due to flange connection.

The present invention has been developed in view of the above-mentioned demands, and an object thereof is to surely insulate a joint portion of a bolt and a nut connecting a flange of a water faucet with a saddle and a saddle. Accordingly, it is an object of the present invention to provide a water faucet with a saddle that prevents electrical corrosion between dissimilar metals.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a water bottle having a water faucet fixed to a saddle coated with an insulating film by means of bolts, the diameter of which is larger than the threaded portion of the bolt. This is a water faucet with a saddle in which a flange of a water faucet is superimposed on a saddle supporting portion having a through hole, and a water faucet and a saddle are fixed with an insulator interposed between a saddle-side bolt or nut and the saddle.

This insulator may be a sleeve made of synthetic resin, or a hole on the flange side of the water tap may be a through hole, and a bolt passes through both through holes and the water tap and the saddle are fixed with bolts and nuts. You may do it.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a water tap with a saddle according to the present invention will be specifically described with reference to FIGS.
1 and 2, a cast iron main pipe for water supply (main pipe for water supply) 1
The saddle 2 and the band 3 are fixed with the bolts and nuts 4 at the diverging positions. The saddle 2 and the band 3 are each provided with an insulating coating film 5 of resin powder on an outer peripheral surface formed of a cast iron material.

On the upper surface of the saddle 2, a rectangular saddle support 6 is provided.
And a water faucet attachment port 7 is formed at the center of the saddle support portion 6. In the saddle supporting portion 6, four through holes 10 having a diameter larger than the outer diameter of the screw portion 9a of the bolt 9 for connecting the water faucet 8 are formed at equal intervals in this example.

In FIG. 2, a rectangular flange 11 formed below the water faucet 8 is mounted on the upper surface of the saddle support portion 6 so as to be superposed on the inner peripheral side of the saddle support portion 6 in which the through hole 10 is formed. A bolt 9 with a hexagonal hole is inserted from the formed counterbore portion 12 side into the through hole 10 in a non-contact state, and the screw portion 9 a of the bolt 9 is screwed and fixed to the female screw 11 a of the flange 11.

In this case, the outer periphery of the screw portion 9a of the bolt 9 and the inner peripheral surface of the through hole 10 are not in contact with each other, and the bolt 9 having the washer 13 and the saddle support portion 6, as shown in FIG. The saddle 2 and the bolt 9 are electrically insulated from the inner peripheral side of the saddle 2 with a resin sleeve-shaped insulator 14 having an insertion hole 14a interposed therebetween.

The insulator may be a resin insulator 15 having a cylindrical portion 15a as shown in FIG. 5 in addition to the embodiment of the insulator 14 shown in FIG. Insulation can be performed simultaneously between the inner peripheral surface of the hole 10 and the outer peripheral surface of the bolt 9. In addition, this insulator may be an insulator such as a flat ring-shaped insulating ring or a split ring-shaped insulating ring, and these insulators are appropriately selected and implemented.

In FIGS. 1 and 2, reference numeral 16 denotes a resin-made annular insulating cover mounted on the lower surface of an annular holder (body cap) 18 of a water stopping mechanism 17. When drilling the perforation hole 19 of the main pipe 1 with a perforator (not shown), electric conduction is prevented when cutting powder or the like coming out of the perforation hole 19 is charged into the lower surface space of the annular holder 18. This is to prevent electrical corrosion at this site.

In the water stop mechanism 17, a ball 20 having a three-way port 20a is rotatably provided inside the water faucet 8 via a stem 21. Further, the water faucet 8 is provided with a piercing tool. A branch port 24 having a mounting port 22 and a joint 23 is provided. In the figure, 25 is a ball seat, 26 is an anticorrosion sleeve, 27 is a gasket, and 28 is a cap.

Next, the operation of the above embodiment will be described.
When the flange 11 of the water faucet 8 is superimposed on the saddle support portion 6 and connected with the bolt 9, since the outer peripheral surface of the saddle 2 is coated with an insulating coating film 5 such as resin powder, the flange 11 and the saddle support portion are provided. 6 is insulated from the outer peripheral surface without electrical conduction, and the screw portion 9a of the bolt 9 is inserted into the through hole 10 of the saddle support portion 6 in a non-contact state.
Bolt 9 and saddle 2 are insulated by insulator 14 or insulator 15. Therefore, for example, even if there is a potential difference due to dissimilar metals between the cast iron saddle 2, the stainless steel water tap 8 and the stainless steel bolt 9, the bolt 9 and the saddle 2 and the saddle 2 and the flange 11 Are reliably insulated from each other, and there is no possibility that electrical corrosion occurs.

In this case, the material of the dissimilar metal of each member is not limited to the above-mentioned materials, but can be applied to various dissimilar metal materials.

FIGS. 6 and 7 are partial sectional views showing another embodiment in which the support portion 6 of the saddle 2 and the flange 11 of the water faucet 8 are connected. In FIGS. 6 and 7, the hole on the flange 11 side of the water faucet 8 is also a through hole 29, and the through hole 29 is the same as the through hole 10, and the screw portion 3 of the bolt 30 is provided.
The diameter of the bolt 30 is formed larger than the outer diameter of 0a, so that the screw portion 30a of the bolt 30 and the inner peripheral surface of the through hole 29 are not in contact with each other.

FIG. 6 shows an example in which the bolt 30 is inserted from the counterbore portion 12 side and fixed by a nut 31. FIG. 7 shows an example in which the bolt 30 is inserted from the flange 11 side and fixed by the nut 31. In this case, too, the insulator 14 or the insulator 15
To prevent electrical corrosion by preventing electrical continuity. In the example shown in FIGS. 6 and 7, for example, a stainless steel bolt 30 is used to connect the dissimilar metal between the bronze or stainless steel water faucet 8 and the cast iron saddle 2.
It is suitable when it is fixed with a nut 31.

[0019]

As is apparent from the above description, according to the present invention, the connecting portion of the bolt and nut for connecting the flange of the water tap and the saddle can be reliably insulated. It has excellent effects such as being able to reliably prevent electrical corrosion between dissimilar metals with the saddle.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a water tap with a saddle in the present invention.

FIG. 2 is a partially cutaway partial cross-sectional view showing a bolt connection part of FIG. 1;

FIG. 3 is a plan view of FIG. 1;

FIG. 4 is a cross-sectional view showing an example of an insulator according to the present invention.

FIG. 5 is a sectional view showing another example of the insulator according to the present invention.

FIG. 6 is a partial cross-sectional view showing another example of the connection state of the flange of the water faucet and the saddle in the present invention.

FIG. 7 is a partial cross-sectional view showing another example of the connection state of the flange and the saddle of the water faucet according to the present invention.

[Explanation of symbols]

 2 Saddle 5 Insulation coating 6 Saddle support part 8 Water faucet 9 Bolt 9a Screw part 10 Through hole 11 Flange 14, 15 Insulator 29 Through hole 30 Bolt 30a Screw part 31 Nut

Claims (3)

[Claims] 1. A water faucet is fixed to a saddle provided with an insulating coating with bolts, and a water faucet flange is superimposed on a saddle support portion having a through-hole larger in diameter than a screw portion of the bolt. A water tap with a saddle, wherein the water tap and the saddle are fixed with an insulator interposed between the bolt or nut on the saddle side and the saddle. 2. The water tap with a saddle according to claim 1, wherein the insulator is a sleeve made of synthetic resin. 3. The hole on the flange side of the water tap is also a through hole,
3. The water tap with a saddle according to claim 1 or 2, wherein the bolt penetrates both through holes and the water tap and the saddle are fixed with bolts and nuts.