JPS6145253Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an anti-freeze valve that automatically discharges water in water heaters and pipes when the water is at freezing temperature in cold regions to prevent accidents such as bursting. It is.

Conventionally, various types of anti-freeze valves have been used in water heaters, etc. to prevent piping from bursting due to freezing of water, but these conventional valves Considering accuracy, ease of use, etc., none of the above methods can be said to be sufficient, and countermeasures have been desired.

In addition, this antifreeze valve also uses an adjustment screw equipped with a nozzle to adjust the opening and closing timing of the valve, and after adjustment, adhesive or sealing resin tape is used to secure the valve in place.

However, in the case of the former method, the adhesive cannot be applied after adjustment due to the structure, and adjustment must be performed after applying the adhesive. For this reason,
It may harden during adjustment, making it impossible to obtain reliable valve opening/closing timing. Furthermore, once set, it cannot be readjusted.

In the latter case, the tape winding process takes time and is inefficient. This also applies to the former.

The present invention aims to solve these conventional problems and to make it possible to easily adjust the timing of opening and closing the valve.

In order to achieve this purpose, in this invention,
An outer frame housing is provided with a water inlet and a water outlet, and a waterway is provided between the inlet and the water outlet, and a threaded portion provided on the wall on the outlet side of the inlet of the outer frame housing is provided with a screw thread. an adjusting screw that is connected to the valve body and has a nozzle; a valve body that is disposed within the outer frame housing and opens and closes the opening of the nozzle; and a valve body that is connected to the valve body via a connecting member and faces the opening of the nozzle. An airtight chamber is formed by fixing an elastic diaphragm placed on the diaphragm and the periphery of the elastic diaphragm to the periphery of a dish-shaped outer frame. Equipped with a sealed chamber unit containing warm substances,
The thread pitch of the adjustment screw is different from the thread pitch of the threaded portion.

With this configuration, when the outside temperature reaches around 0 to 5 degrees Celsius, the valve body is automatically moved to open and close, draining the water in the pipes and preventing accidents such as bursting due to freezing. .

Furthermore, since the adjusting screws are screwed into the threaded portions at different pitches, the adjusting screws can be fixed without using adhesive or sealing resin tape, making adjustment easy. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings of FIGS. 1 and 2.

In the figure, 1 is an outer frame body, and this outer frame body 1 is provided with an inlet 1a and an outlet 1b for water, and a ring 2 is attached to the cylindrical portion having the inlet 1a. A device mounting bracket 3 is provided in the frame casing 1 and is held in place so as not to come off.

Reference numeral 4 denotes an adjustment screw having a nozzle 4a for regulating the amount of water flowing inside the outer frame body 1, which is screwed into the wall surface between the inlet 1a and the outlet 1b of the outer frame body 1, The inlet 1a and the outlet 1b communicate with each other via a nozzle 4a.

A seal ring 5 seals the outer frame body 1 and the adjusting screw 4.

6 is a dish-shaped outer frame which together with the outer frame body 1 constitutes an outer frame case; 7 is an elastic diaphragm; It is fixed to the outer frame 6 by soldering using ring-shaped solder or the like. A sealed chamber is formed by the outer frame 6 and the elastic diaphragm 7, and a temperature-sensitive substance 8 such as freon, which undergoes a rapid volume change at a temperature of about 0 to 5°C, is sealed in this sealed chamber. A closed room unit is constructed by: Further, in this sealed chamber unit, the elastic diaphragm 7 is connected to the nozzle 4 of the adjustment screw 4.
It is attached to the outer frame body 1 so as to face the opening a.

Reference numeral 9 denotes a connecting rod whose one end is fixed approximately at the center of the elastic diaphragm 7, and the other end of this connecting rod 9 is fitted with a rubber valve 10 for opening and closing the opening of the nozzle 4a of the adjusting screw 4. is provided with an annular collar 9a. Further, the rubber valve 10 has the adjustment screw 4
The nozzle 4a is crimped onto and released from the nozzle 4a, and has a cap shape consisting of a head 10a that regulates drainage, and an annular peripheral portion 10b integrally formed at the end of the head 10a.

Reference numeral 11 denotes a skirt-like rubber plate inserted into the head 10a of the rubber valve 10, and the rubber plate 11 is connected to the peripheral edge 10b of the rubber valve 10 and the inner surface of the outer frame body 1 in which the adjustment screw 4 is disposed. The peripheral edge portion is in close contact with the inner surface of the outer frame body 1.

Reference numeral 12 denotes a fixing fitting for fixing the sealed room unit within the outer frame housing body 1, and 13 a metal plate made of a metal with good thermal conductivity such as aluminum that also serves as a name plate. It is in contact with 6,
This is to efficiently transmit outside temperature.

In the above configuration, when the adjusting screw 4 and the head 10a of the rubber valve 10 are installed in a state where they are in proper contact with each other, the connecting rod 9 is caused to bend due to the elastic diaphragm 7 at room temperature.
The rubber valve 10 is pressed against the opening of the nozzle 4a through the nozzle 4a, and the water in the inlet 1a of the outer frame body 1 is stopped by the nozzle 4a.

Then, when the outside air temperature drops to around the freezing temperature of water, that is, below 5°C, the temperature-sensitive substance 8 that causes a volume change, such as freon, contracts in volume, and the deflection of the elastic diaphragm 7 changes, causing the adjustment screw to 4 and the rubber valve 10, water in the water heater or pipes flows out due to water pressure, and accidents such as bursting due to freezing of water can be prevented.

By the way, in the antifreeze valve according to the present invention, the second
As shown in the figure, the thread pitch of the adjustment screw 4 and the threaded part of the threaded part provided on the wall surface on the outlet side of the inlet port 1a of the outer frame main body 1 to which it is screwed are slightly (0.05
mm). With this, when you start screwing in, the screws are lightly screwed together, but once you tighten them to a certain extent, the ridges of the screws collide with each other, making it impossible to turn unless you apply a considerable amount of force. Therefore, by setting the length of each screw appropriately, the screws can be screwed in with a constant force, and the position can be securely fixed.

As described above, according to the antifreeze valve of the present invention, the following effects can be obtained.

(1) The position of the adjustment screw can be reliably fixed in the outer frame casing without using any other additives.

(2) Also, readjustment can be easily performed after the position is fixed.

(3) Possible to adjust position with constant torque.

(4) It is easy to work with.

(5) There is no increase in processing costs for parts.

(6) Since adhesives, sealing tapes, etc. are not used, the price can be reduced.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the structure of an antifreeze valve according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the main parts of the antifreeze valve. 1...Outer frame body, 1a...Inflow port, 1b...
...Discharge port, 4...Adjustment screw, 4a...Nozzle, 6
... Outer frame, 7 ... Elastic diaphragm, 8 ... Temperature-sensitive substance, 9
...Connection rod (connection member), 10...Rubber valve (valve body).

Claims (1)

[Scope of utility model registration request] An outer frame housing is provided with a water inlet and a water outlet, and a waterway is provided between the inlet and the water outlet, and a threaded portion provided on the wall on the outlet side of the inlet of the outer frame housing is provided with a screw thread. an adjusting screw that is connected to the valve body and has a nozzle; a valve body that is disposed within the outer frame housing and opens and closes the opening of the nozzle; and a valve body that is connected to the valve body via a connecting member and faces the opening of the nozzle. An airtight chamber is formed by fixing an elastic diaphragm placed on the diaphragm and the periphery of the elastic diaphragm to the periphery of a dish-shaped outer frame. 1. An anti-freeze valve comprising: a sealed chamber unit configured by enclosing a hot substance, and wherein the thread pitch of the adjusting screw and the thread pitch of the threaded portion are different.