JP2001289385A - Saddle snap tap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a saddle snap tap to be erected on a saddle via a flange by mounting a ball valve element at a lower opening of a snap tap body, having the snap tap body kept lower for permitting embedding in small depth and preventing corrosion due to the contact of a dissimilar metal. SOLUTION: An annular tightening member for supporting a ball valve element via a pair of ball sheets in the snap tap body is threaded to be fitted inside the opening, with a lower end collar portion of the annular tightening member, on which an O-ring is placed, not to contact the lower edge of the lower opening of the snap tap body. A resin insulating plate is laid between the flange of the lower part of the snap tap body and a fitting hole of the saddle. Besides, a resin insulating washer is laid between a bolt and a nut for tightening and fixing the saddle to a band.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saddle water tap for taking out a branch pipe from a water main pipe or the like buried underground. This is related to a saddle water faucet that is configured to be attached to the saddle via a hole. Is to be prevented.

[0002]

2. Description of the Related Art Conventionally, saddle taps have been widely used as a method of branching off from a water main or the like buried underground without interruption. The conventional water faucet body generally has a structure in which a ball-type valve body is fitted from above, and this is assembled to the saddle from above, so the overall height has increased and the buried depth has been reduced to a recent construction method. Had the problem of being unsuitable.

[0003] Further, in the conventional configuration, the saddle portion and the water separation portion are often screwed or flanged, but in any case, dissimilar metals come into contact with each other, which causes electrolytic corrosion. There was also a problem that would.

One of the solutions to such a problem is, for example, a saddle water faucet as disclosed in Japanese Patent Application Laid-Open No. 10-306895. The saddle water faucet disclosed herein has a flange provided at a lower portion of the water faucet body fixed to a support surface formed on the saddle via a plurality of bolts, and a saddle member inside the water faucet body. A water stop mechanism with an independent structure is provided. In this water stop mechanism, a ball (valve element) having a three-way port is rotatably provided via a stem. One ball seat is mounted, and the other ball seat is mounted on an upper step portion of an annular holding member screwed through a water inlet of a water faucet body via a seal ring.

[0005] With this configuration, it is possible to prevent water contact of the saddle portion by the conventional flange joining, to stabilize the water stopping performance, and to reduce the height to the branch port. Met.

[0006]

However, the threaded structure of the water port of the water faucet main body and the annular holder has a screwed lower end of the water faucet main body in order to prevent the annular holder from being overtightened. Adopts a structure that makes contact with the lower end flange of the annular holder,
The annular holding portion to be tightened from below is prevented from advancing further. A seal ring is provided so as to be surrounded by the two.

Therefore, structurally, the entire height is increased only at a portion where the lower end of the water faucet main body and the lower end flange of the annular holder abut, and the overall height of the water faucet is desired to be reduced as much as possible. Was not enough to meet the demand. Further, since the annular holder is prevented from moving forward at a fixed distance, there is a disadvantage that the height of the ball seat with respect to the ball valve body cannot be sufficiently adjusted, and the fine adjustment of the sealing property with respect to the seal ring cannot be performed.

Furthermore, the presence of such a contact portion requires precision in the working dimensions of the portion, which has been a factor that increases the manufacturing cost.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a saddle component in which a ball-type valve body is mounted from a lower opening of a water faucet body and stands upright on a saddle via a flange. In the faucet, an annular fastening member that supports a ball-type valve body via a pair of ball seats inside a water faucet main body, and a lower end flange portion of the annular fastening member on which an O-ring is placed is a lower end of the opening. A means of screwing so as to fit into the inside of the opening without contacting the edge was adopted.

With this configuration, the height of the entire saddle faucet can be kept low, and it is possible to cope with a recent construction method of reducing the burial depth.

Further, in the saddle faucet, a means of interposing a resin insulating plate between the flange at the lower part of the faucet main body and the fitting hole of the saddle is adopted.

The resin insulating plate makes it possible to completely insulate the saddle from the main body of the water faucet, thereby reliably preventing electrolytic corrosion caused by contact between different kinds of metals.

Further, a means of interposing a resin insulating washer between bolts and nuts for fastening and fixing the saddle and the band is employed.

Such an insulating washer interrupts the electrical connection between the saddle and the band to prevent the occurrence of electrolytic corrosion.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a saddle tap according to the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a perspective view showing the entire saddle tap according to the present invention, FIG. 2 is a partially cutaway sectional view thereof, and FIG.
FIG. 3 is an enlarged sectional view of a water stop mechanism.

In the drawing, reference numeral 1 denotes a semi-circular saddle having a flat mounting portion 1a on which a water faucet body described below can be erected, and a center of the mounting portion 1a to be described later. Hole 1b into which the lower edge of the water faucet main body and the resin insulating plate are recessed
And an accommodation hole 1c for accommodating the saddle packing is formed on the back side thereof in communication with the fitting hole 1b. Reference numeral 2 denotes a saddle packing having a water passage hole 2a formed at the center thereof, the lower end surface of which is formed in a substantially curved shape so as to be in close contact with the outer peripheral surface of a water supply main pipe (not shown). Reference numeral 3 denotes a semicircular band for holding the water supply main pipe together with the saddle 1, and a flange 3a provided on the left and right of the band and a flange 1d provided on the left and right of the saddle 1 are fastened and fixed by bolts and nuts 4. It is. Reference numeral 4a is an insulating washer made of resin. Since the electrical connection between the saddle and the band can be cut off by the insulating washer, it is effective in preventing electrical corrosion at the portion.

Reference numeral 5 denotes a main body of a water tap installed on the saddle 1, and a ball type valve element 7 is rotatably fitted in a water tap housing 6 having a horizontal T-shaped water diversion path and having an opening 6a on the lower surface. The water channel is opened and closed by the water stop mechanism. The water stop mechanism of the water faucet main body includes a ball seat 8, a ball valve 7, and a ball seat 9 from below through an opening 6 a on the lower surface of the faucet housing 6.
And an annular fastening member 10 having a water hole 10b at the center is screwed into the inside of the opening 6a via an O-ring 11, and the O-ring 11 is placed. The flange 10a at the lower end of the annular fastening member 10 does not come into contact with the lower end edge of the opening 6a of the plug housing 6, but is fitted inside the opening 6a. This allows the annular fastening member 10 to move forward and backward regardless of the lower end of the opening. In addition,
Reference numeral 12 denotes an operating handle (not shown) of the ball type valve element 7.
This is a stem that controls the opening and closing of the valve by attaching a valve.

The main body 5 of the water faucet is made of a ring-shaped insulating plate 1 made of resin.
3, the lower end of the opening 6 a of the tap housing 6 is recessed into the fitting hole 1 b of the saddle 1, and the four corners of the flange 5 a provided at the lower part of the water faucet main body 5 are tightened with bolts 14 to mount the saddle 1. 1a. Accordingly, the water faucet main body 5 and the saddle 1 are completely electrically insulated by the resin insulating plate 13,
There is no possibility that electrolytic corrosion will occur in this part. In addition, saddle 1
Corrosion can be completely prevented without coming into contact with running water. Reference numeral 14a denotes an insulating washer made of resin, which is effective for completely insulating the water faucet main body 5 from the saddle 1.

Reference numeral 15 denotes a mounting port for mounting a piercing tool or an insertion tool, and performs operations such as piercing a water main through the portion and inserting an anticorrosive sleeve. 16 is this mounting port 1
5 is a cap for covering the cover 5.

The saddle water faucet of the above embodiment is capable of advancing and retracting the ball seat 9 so that the lower end flange 10a of the annular fastening member 10 does not abut on the lower end edge of the opening 6a of the faucet housing 6. As a result, the operating torque of the valve and the water stopping performance can be finely adjusted, and the sealing performance of the O-ring 11 can be adjusted by tightening or the like, thereby eliminating the risk of water leakage.

Further, since the annular fastening member 10 is fitted into the opening 6a, the height of the water faucet as a whole can be reduced by that much, and the construction method in which the burial depth is reduced is adopted. In addition, durability against external force is increased, and vibration of a large vehicle or the like running on the ground is not propagated to the saddle faucet to cause the saddle to shift or cause an accident such as water leakage.

Further, since the water faucet main body 5 and the saddle 1 are completely insulated by the resin insulating plate 13, electrolytic corrosion due to contact of dissimilar metals does not occur. Further, since the saddle and the band are also electrically disconnected by the insulating washer 4a, there is no possibility of electrolytic corrosion.

[0023]

As described above, in the saddle water tap according to the present invention, the annular fastening member for supporting the ball type valve body via the pair of ball seats is provided inside the water tap main body by the O-ring. Is screwed so that the lower end flange portion of the annular tightening member on which is mounted does not come into contact with the lower end edge of the opening and is fitted inside the opening, so that the overall height can be reduced as much as possible. In the required saddle tap, the height to the branch opening can be kept lower than before, and it is possible to prevent the saddle from shifting or twisting due to external force even with a construction method with a small burial depth. The effect can be expected.

Further, since the degree of freedom of the tightening of the annular tightening member is increased, fine adjustment of the sealing property of the portion can be performed, and the accident such as water leakage can be surely prevented.

Further, since an annular resin insulating plate is interposed between the flange at the lower part of the water faucet main body and the insertion hole of the saddle to completely insulate them, electrolytic corrosion does not occur, and the product does not suffer from electrolytic corrosion. The service life and durability of the device have been remarkably improved. Similarly, since the saddle and the band are also insulated by the insulating washer, electrolytic corrosion does not occur from the portion.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a saddle tap according to the present invention.

FIG. 2 is a partially cutaway sectional view of the saddle tap of FIG. 1;

FIG. 3 is an enlarged cross-sectional view of a water stop mechanism of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Saddle 1a Mounting part 1b Fitting hole 2 Saddle packing 3 Band 4 Bolt / Nut 4a Insulation washer 5 Water faucet main body 5a Flange 6 Plug housing 6a Opening 7 Ball type valve element 8 Ball seat 9 Ball seat 10 Ring fastening member 11 O-ring 13 Resin insulating plate 14 Bolt

Continued on the front page F term (reference) 3H019 CA03 CA06 3H051 AA07 BB10 CC11 CC14 CC15 CC16 FF02 3H054 AA03 BB02 BB03 BB16 CA03 CB18 CB35 CC03 CD14 CE01 CE02 DD08 DD10 GG02

Claims (3)

[Claims] In a saddle water faucet, a ball-type valve body is mounted from a lower opening of a water faucet body and is erected on a saddle via a flange, a pair of ball seats are provided inside the water faucet body. The annular fastening member supporting the ball type valve element is screwed so that the lower end flange of the annular fastening member on which the O-ring is placed does not come into contact with the lower edge of the opening and fits inside the opening. A saddle faucet characterized by being worn. 2. The saddle water tap according to claim 1, wherein a resin insulating plate is interposed between the flange at the lower part of the water tap main body and the insertion hole of the saddle. 3. The saddle tap according to claim 1, further comprising a resin washer interposed between bolts and nuts for fastening and fixing the saddle and the band.