JPH0317098Y2 - - Google Patents

Description

[Detailed explanation of the invention] In cold regions such as Hokkaido, drain valves were devised to prevent tap water from freezing during the winter. However, as the number of hot water supply facilities increased, torii-shaped piping began to be used, and as a result, freezing began to occur.

What is Torii-type piping?As shown in Figure 1, water supply pipe 1
is connected to a drain valve 3 having a drain valve 2, and the drain valve 3 is connected to a drain valve 3 having a drain valve 2.
The faucet 7 is reached through a riser pipe 4, a horizontal pipe 5, and a downpipe 6 connected to the faucet 7, and the horizontal pipe 5 is located at a higher position than the faucet 7.
In this case, if the pressure inside the pipe was lower than atmospheric pressure, drainage would not be sufficient, which could lead to freezing. To solve this problem, it was devised to provide an intake valve somewhere in the pipe to eliminate the negative pressure inside the pipe. However, intake valves have both advantages and disadvantages, and some structures allow water to remain in some parts of the intake valve, so a perfect intake valve has not yet been devised.
In view of the above-mentioned prior art, it is an object of the present invention to provide an intake valve that can easily thaw even if it freezes.

In order to achieve the above object, the present invention has the following configuration. A more detailed explanation will be given below with reference to an embodiment shown in the accompanying drawings.

8 in the figure is a safety valve, which includes a screw part 9 and a cap 1.
0, and a T-shaped through hole 11 is bored in the screw portion 9. 12 is a circular bushing,
Threads are cut on both the inside and the outer periphery, and the internal female screw threads into the threaded portion 9 of the safety valve 8. 13 is a stopper for the threaded portion 9. Reference numeral 14 denotes a main body, which is composed of a circular tubular portion 15 and a flange portion 16, and has an air chamber R inside. It is intended to be able to be provided and screwed onto the bushing 12. A screw is carved on the outside of the circular tubular part 15, and a step 17 is provided at the lower part of the inside to make it protrude. 18 is a cylindrical valve seat, the inner diameter of which is largest at the lower part forming a chamber 20,
The inner diameter of the upper part 22 is the smallest, and the inner diameter of the upper part 22 is intermediate, so that a step 23 is provided from the upper part 22 to the central part. 34 is the lower body of the valve seat. The outer periphery of the valve seat 18 is the circular tubular portion 1 of the main body 14.
Its outer diameter is larger at the top to fit the inner diameter of 5.
The bottom part is slightly smaller. 24 is a notch on the lower edge. The umbrella-shaped valve A consists of an umbrella-shaped part 25 and a columnar part 26. The umbrella-shaped part 25 is made of a flexible material and has an umbrella-shaped shape, but the outer edge of the top part has a protrusion 2 over the entire circumference.
7, and its diameter is slightly larger than the inner diameter of the central portion 21 of the valve seat 18. The columnar part 26 has its base buried in the umbrella-shaped part 25, and 27 is a spring, and 28 is a spring.
is a spring receiver, and the spring 27 is provided between the step 23 and the spring receiver 28. 29, 30, 31, 32
Both are O-rings. 33 is a color.

Although the above is similar to the known product, the new feature of the product of the present invention is the tube body 35.

The tube body 35 is made of a material with high thermal conductivity, and has several tanzaku-shaped tongues 36 at a constant pitch at its lower part, which are screwed into the lower body 34.
When installing the product of the present invention, it is installed so that the tongue piece 36 protrudes into the branch pipe of the water supply.

By using the product of this invention, even if the water adhering to the lower part of the umbrella valve A and the lower body 34 freezes due to surface tension, the water from the water supply pipe 1 can be removed by operating the handle of the drain valve. When the water is introduced into the riser pipe 4 and horizontal pipe 5, and the faucet 7 is opened to start water supply,
Even when the water pressure is low or the flow rate is low, the tongue piece 36 is located in the flow of water, so the heat due to the water temperature is transferred to the tongue piece 36, the pipe body 35, the lower body 34, and the umbrella valve A. The above-mentioned frozen portion is quickly thawed.

Since the present invention has the above configuration, it has the effect of easily and quickly thawing even when frozen.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing torii-type piping, Figure 2 is a front sectional view of the previous design, Figure 3 is a front sectional view showing the intake state of the previous design, and Figure 4 is the installation of the previous design. Fig. 5 is a front sectional view showing the case where the previous device is installed on a horizontal pipe;
FIG. 6 is a front sectional view of the product of the present invention, and FIG. 7 is a partially cutaway perspective view of the tube body.

Claims (1)

[Scope of utility model registration request] A through hole is provided at the top, an air chamber that communicates with the through hole is provided in the center, and a valve seat that communicates with this,
In an intake valve that is opened and closed by an umbrella-shaped valve that moves up and down depending on pressure changes in a branch pipe, a tube body 35 made of a material with high thermal conductivity and having several tongues 36 is attached to the lower body 34 of the valve seat 18. An intake valve which is preferably formed by screwing together and having a tongue piece 36 protruding into a water supply branch pipe.