JPH0332604Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an antifreeze device that prevents water in water supply pipes, such as water supply pipes, from freezing and damaging the pipes.

"Prior Art" Conventionally, as shown in Japanese Utility Model Application Publication No. 58-129964, a cylinder is connected and fixed to a water supply pipe through a branch pipe, and one end of a valve body that is slidably inserted into the cylinder is connected to the branch pipe side. The valve body is installed in a protruding manner, and the water pressure inside the water supply pipe causes the valve body to come into contact with the inner end surface of the cylinder so that it can move toward and away from the cylinder, and the valve body is opened by the volumetric expansion effect when the water in the freezing chamber inside the cylinder turns into ice. There is now a technology that prevents the water in the water pipes from freezing by releasing the water inside the water pipes to the outside.

"Problems to be Solved by the Invention" Since the above-mentioned conventional technology does not use a heat-sensitive medium other than water, there is no need to adjust the temperature of an on-off valve, and water discharge loss due to uneven temperature control can be reduced.
It can be easily used in high-temperature or high-pressure water pipes, and it can obtain stable opening and closing operations with almost no changes in water pressure in the water pipe, and uses the water pressure in the water pipe to perform proper valve closing action. Moreover, since the only moving part is the valve body, it has the advantage of being simple and highly durable.

However, the above-mentioned conventional technology does not form a drainage passage inside the valve body to control communication between the inside of the water supply pipe and the outside through the opening and closing operations of the valve body. Since a freezing chamber that operates to open the valve body is not formed between the inner circumferential surface of the cylinder and the outer circumferential surface of the valve body, after ice is formed in the freezing chamber and the valve body is opened, the outside temperature will decrease. Due to the rise in temperature, the valve remains open until the ice in the freezing chamber melts, and in cold weather, the valve body operates continuously for a long time, making it difficult to save wastewater flowing out through the valve body. In addition to being extremely uneconomical, the valve body cannot be opened and closed in accordance with changes in the water temperature in the water supply pipe, and the opening and closing functions of the valve body cannot be easily improved.

"Means for Solving the Problems" However, the present invention fixes a cylinder to the water supply pipe via a branch pipe, and inserts a valve body into the cylinder so as to be able to slide freely. is fixed, and a return spring is provided to make the end face of one side of the valve body protrude into the branch pipe and come into contact with the valve seat, and a drainage passage is provided in which one end side is closed by the valve seat and the other end side is opened to the outside. A freezing chamber is formed inside the valve body and between the inner peripheral surface of the cylinder and the outer peripheral surface of the valve body, and the valve body is opened by the volume expansion action when water turns into ice. It is something to do.

``Function'' Therefore, when the valve body opens, the water in the water supply pipe flows out from the drainage passage inside the valve body, so that when the water in the water supply pipe is used, the water is drained from the warm water buried in the soil on the upstream side. Water moves through the drainage passage, and the warm water melts the ice in the freezing chamber and closes the valve body, saving waste water flowing out through the valve body even in cold weather, making it more efficient than before. In addition to being economical to use, water from the water supply pipe moves through the valve body with the freezing chamber formed on its outer periphery, so the water temperature within the water supply pipe is almost unaffected by changes in outside temperature. The valve body can be opened and closed appropriately by following the
This makes it easier to improve the opening/closing function of the valve body compared to conventional valves.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. Fig. 1 is a front explanatory view, and Fig. 2 is a side explanatory view.
Connect the branch pipe 2.

As shown in FIGS. 3 and 4, heat exchange fins 3
A cylindrical cylinder 4 with ... integrally formed on the outer peripheral surface
The threaded part 6 on the upper end side of the cylinder 4 is screwed into the branch saddle part 5 provided downward on the lower surface side of the branch pipe 2 using a nut part 7, and the cylinder 4 with its lower end opened is attached to the branch saddle part 5 provided downward on the lower surface side of the branch pipe 2. Fix it by hanging it.

Further, a valve body 8 is slidably inserted into the cylinder 4 from the lower end side, a lid body 9 is screwed and fixed to the lower end of the cylinder 4, and the valve body 8 is inserted and supported inside the cylinder 4, and the water drain hole is A spring seat 11 with a spring 10 formed at the center is screwed onto the lid 9, and a return spring 12 that pushes up and supports the valve body 8 is attached to the spring seat 1.
1, and the upper end of the valve body 8 is projected into the branch pipe 2 by moving the valve body 8 upward by the force of a return spring 12.

Further, a pedestal 13 integrally formed within the branch pipe 2
A valve seat 14 is screwed and fixed to the valve seat 14, a valve seat packing 15 is fixed to the valve seat 14, and the upper end of the valve body 8 is brought into contact with the valve seat packing 15.
a drainage passage 16 whose upper end is closed by a drain hole 10 and whose lower end is opened to communicate with the outside through the drain hole 10;
is formed at the central axis position inside the valve body 8, and when the valve body 8 opens, water in the water supply pipe 1 passes through the inside of the valve body 8 via the drainage passage 16, and the water drain hole 10 to the outside.

A freezing chamber 17 is formed by the inner circumferential surface of the intermediate portion of the cylinder 4 provided with the fins 3 and the outer circumferential surface of the valve body 8 opposing thereto, and an O-ring packing 18 is provided on the lower end side of the freezing chamber 17. In addition to sealing the lower end side, an initial freezing passage 19 is formed by the inner circumferential surface of the cylinder 4 and the outer circumferential surface of the valve body 8 at the upper end side of the freezing chamber 17, and the initial freezing passage 19 and the filter 2 provided on the upper end side are formed.
The freezing chamber 17 is communicated with the inside of the water pipe 1 through the initial freezing passage 19, and the freezing chamber 17 is filled with water from the water supply pipe 1 through the initial freezing passage 19. The water in the freezing chamber 19 is first solidified, and then the water in the large-capacity freezing chamber 17 is solidified, and the volume expansion effect when the water in the freezing chamber 17 turns into ice pushes down the valve body 8 to open it. are doing.

Further, a coil-shaped heat transfer accelerator 21 is provided inside the freezing chamber 15 to accelerate the solidification or thawing time of water inside the freezing chamber 15, and to retain water in the freezing chamber 15 without reducing the heat transfer area. It is designed to reduce the amount of heat.

This embodiment is constructed as described above, and includes water supply pipes such as general water supply pipes, water supply and drainage pipes for solar water heaters, boiler pipes and water heater pipes, and water tank and cooling tower pipes.
As shown in Fig. 1, the cylinder 4 and the valve body 8 are disposed via the branch pipe 2, and as the outside temperature drops, the water in the initial freezing passage 19 first solidifies, and then the water in the freezing chamber 17 solidifies. At this time, the valve element 8 is pushed down and opened by the volumetric expansion effect when the water in the freezing chamber 17 turns into ice. Furthermore, since the initial freezing passage 19 is disposed above the freezing chamber 17, the amount of volumetric expansion of water can be obtained more reliably as the stroke of the valve body 8.

Further, as the valve body 8 opens, water in the water supply pipe 1 flows into the drain passage 16 through the gap formed between the valve body 8 and the valve seat packing 15, and the water is transferred to the drain passage 16 and the water drain hole. 10 to the outside of the lower end of the cylinder 4 to prevent the inside of the water supply pipe 1 from freezing.

In addition, the water in the water supply pipe 1 is used, and as the warm water from the pipe buried in the soil on the upstream side moves within the water supply pipe 1, the warm water in the water supply pipe 1 is transferred to the valve body 8. When the water flows out from the central drainage passage 16, the ice in the freezing chamber 17 is melted by the heat of the warm water, and the valve body 8 is closed by the force of the return spring 12. When the water temperature in the water supply pipe 1 rises, the valve body 8 is closed even when the outside temperature is low, without being affected by changes in the outside temperature, and the water supply pipe 1 is closed when the water is not in use. The valve body 8 opens when the internal water temperature decreases and the outside temperature is low.

"Effect of the invention" As is clear from the above embodiments, the present invention fixes the cylinder 4 to the water supply pipe 1 via the branch pipe 2,
The valve body 8 is slidably inserted into the cylinder 4, while the valve seat 14 is fixed inside the branch pipe 2.
A return spring 12 is provided whose one end surface protrudes into the branch pipe 2 and comes into contact with the valve seat 14, and a drainage passage 16 is provided whose one end is closed by the valve seat 14 and whose other end is opened to the outside. Formed inside the valve body 8,
Furthermore, a freezing chamber 17 is formed between the inner circumferential surface of the cylinder 4 and the outer circumferential surface of the valve body 8, and the valve body 8 is opened by the volumetric expansion effect when water turns into ice. As the water in the water supply pipe 1 flows out from the drainage passage 16 inside the valve body 8 due to the opening operation of 16, the warm water melts the ice in the freezing chamber 17 and closes the valve body 8. This saves waste water flowing out through the valve body 8 even in cold weather, making it easier than before. It can be used economically, and since the water from the water supply pipe 1 moves inside the valve body 8 which has the freezing chamber 17 formed on its outer periphery, the water supply pipe 1 is almost unaffected by changes in the outside temperature. The valve body 8 can be opened and closed appropriately by following the changes in the water temperature inside the valve body, and has practical effects such as being able to easily improve the opening and closing function of the valve body 8 compared to the conventional method. It is.

[Brief explanation of the drawing]

FIG. 1 is an explanatory front view showing an embodiment of the present invention;
2 is an explanatory side view, FIG. 3 is an AA view of the previous figure, and FIG. 4 is an exploded explanatory view. 1... Water supply piping, 2... Branch pipe, 4... Cylinder, 8... Valve body, 12... Return spring, 14...
... Valve seat, 16... Drain passage, 17... Freezing chamber.

Claims (1)

[Scope of utility model registration request] Fix the cylinder to the water pipe via a branch pipe,
While a valve body is slidably inserted into the cylinder,
A valve seat is fixed in the branch pipe, and a return spring is provided to cause one end of the valve body to protrude into the branch pipe and come into contact with the valve seat, and one end is closed by the valve seat and the other end is closed to the outside. A drainage passage is formed inside the valve body, and a freezing chamber is formed between the inner circumferential surface of the cylinder and the outer circumferential surface of the valve body, and the valve body is opened by volume expansion when water turns into ice. An anti-freezing device characterized by forming.