JPH0618089Y2 - Anti-freezing device - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention relates to an antifreezing device having a spring member which is used in various equipment pipes such as water pipes and instantaneous water heaters, and which deforms in response to changes in the outside temperature. is there.

2. Description of the Related Art Conventionally, various equipment pipes such as a water supply system and a water heater are wound with a heat insulating material or drained to remove water, thereby coping with freezing. However, these methods have drawbacks in that they require special processing on the device side, require a large amount of cost, and require special operations. Therefore,
There has been proposed a freeze prevention device that does not require special processing on the device side and can automatically prevent freeze with a simple structure. This antifreezing device uses an alloy actuating member called a so-called shape memory alloy, in which the material is restored to its shape before deformation when a temperature change is given by heating after deforming the material, A specific example will be described with reference to FIG. The antifreezing device (1) shown in the same figure has a horizontal tubular portion (5a) connected to the water pipe (2) and a vertical tubular portion that is connected to the central portion in the longitudinal direction of the horizontal tubular portion (5a) and projects downward. A main body (5) formed from (5b) and a T-shaped cylinder, a cap (7) having a drainage port (7a) attached to the lower end of the horizontal tubular part (5a), and a drainage port (7a). It is composed of a valve (8) that opens and closes, an actuating spring (9) made of a shape memory alloy for actuating the valve (8), a bias spring (10) of the valve (8), etc. Water in the tubular portion (5a) enters the vertical tubular portion (5b) through the communication hole (11) and is discharged to the outside from the water draining port (7a) of the cap (7).

The knob (6a) of the safety valve (6) has a horizontal tubular portion (5a).
By operating this knob (6a) provided outside, the effective opening area of the communication hole (11) is adjusted, and the amount of drainage from the drain port (7a) is adjusted.

As shown in FIG. 12 and FIG. 13, the antifreezing device (1) is installed in the pipe of the water supply or the instantaneous water heater (12), and when the water temperature becomes close to the freezing temperature, the operation spring (9) is activated. It expands and opens the valve (8) by pushing it up against the biasing force of the bias spring (10), draining it from the drainage port (7a), and shrinking when the water temperature rises, the biasing force of the bias spring (10). Allows the valve (8) to close. [Japanese Patent Publication No. 60-14820] Problems to be Solved by the Invention By the way, in the antifreezing device (1), the safety valve (6) has a communication hole (from the knob (6a) outside the horizontal tubular part (5a) to the communication hole ( Toward 11), it crosses the horizontal tubular part (5a) in the direction perpendicular to the flow direction of water. Therefore, the flow in the water pipe (2) is significantly obstructed by the safety valve (6). Further, the actuating spring (9) expands in response to the temperature change of the water accumulated in the vertical tubular portion (5b), whereby the valve (8) is extended.
Push up. However, in reality, there is a difference between the temperature of the water flowing in the water pipe (2) and the temperature of the water in the vertical tube portion (5b), so that the water pipe ( There was a risk that the other parts of 2) would freeze. in this way,
With the water temperature sensing method, it was difficult to detect water temperature changes sensitively.

On the other hand, a spring member made of a shape memory alloy for opening the valve is used as an outside air temperature sensing method.
No. 16865, No. 59-147965, and the like.

However, since these valves are installed directly against the high pressure part of the water pipe, they may cause malfunctions, and in the case of malfunctions, there is no means to prevent this. There is a problem in terms of sex.

Means for Solving the Problems The present invention has been proposed in view of the above problems, and is a shunt that is inserted in the middle of a piping path of equipment piping and allows the fluid to flow out from the side of the main body in a finely adjustable amount. And a valve body that is detachably attached to the lower part of the valve body and blocks the outflow passage from the valve body, and is urged by the first spring member in the valve opening direction. , A piston body biased in the valve closing direction by a second spring member made of a shape memory alloy is slidably built in, and has a water drainage port at the lowermost end, and always communicates with the outside air through this water drainage port. In an antifreezing device provided with a valve box in which a second spring member is arranged in a chamber, a valve seat of the shunt is formed in the valve body so as to be orthogonal to a pipe passage of equipment piping, and the valve body is also provided. Is formed in the valve box downstream of the valve seat so as to be orthogonal to the valve seat. The operating valve installed in (1) is arranged in the low pressure chamber position which is displaced from the main flow (high pressure) of the piping path of the equipment piping via the outflow path from the diversion plug and the valve body.

Action According to the above means, when the outside air temperature becomes near the freezing temperature,
By the second spring member, the actuating valve is opened, and the water in the equipment pipeline can be flowed at a flow rate adjusted by the diversion valve to prevent freezing.

On the other hand, if the outside air temperature is recovered to a temperature at which it does not freeze, the second spring member can close the operating valve to prevent unnecessary water leakage.

Also, since the operating valve is located in the low pressure chamber position shifted from the main flow (high pressure) of the equipment piping line via the outflow passage from the diversion plug and valve body, high pressure water should act directly. It is possible to prevent malfunction.

Furthermore, the shunt is a means for adjusting the amount of drainage at the time of freezing prevention and also as a means for preventing useless water leakage even if the second spring member is damaged and the operating valve remains open. Become.

Embodiment An embodiment of the antifreezing device according to the present invention will be described with reference to FIGS. 1 to 11. In the antifreezing device (21) shown in FIGS. 1 to 3, (22) is a valve body which is inserted in the middle of the pipe passage of various equipment pipes such as water pipes and instantaneous water heaters, and has a cylindrical shape. A protrusion (22b) whose inside communicates with the main pipe (22d) is provided on the side of the main body (22a) of the main body (22a), and the protrusion (22b) is equipped with a diversion plug (23). A communication hole (22c) communicating downward is formed in a part of the inside. The said shunt (23)
Is a rubberized kelep (23a) that closes the outlet of the main pipe (22d).
And a stopper with rubber (23a), which is screwed into the protrusion (22b) and is movable in the horizontal direction. The opening end of the protrusion (22b) is packed with a packing receiver. (24) and a triangular packing (25) are used to hermetically seal with a nut (26). Therefore, by rotating the stopper rod (23b) from the state where the front end surface of the rubber-equipped kelep (23a) is brought into contact with and blocked by the outlet of the main pipe (22d), the outlet and the rubber-equipped kelep (23a) are rotated. ), A fluid flowing through the main pipe (22d) is caused to flow downward from the clearance through the communication hole (22c). (27) is a valve seat head that is airtightly fitted to the lower part of the valve body (22) and fixed by a set screw (28), and which has a flow passage (27a) communicating with the communication hole (22c) inside. It is laid vertically.

(29) is a valve box, and the flow path (27
a) a working valve (30) for closing the lower part, a piston body (31) which is integrated with the working valve (30) and slides vertically in the valve box (29), a valve seat head (27) A first spring member (33) that is interposed between the piston bodies (31) and biases the piston bodies (31) downward via a spring seat (32), and the piston body (31) and the lowermost end of the valve box. And a second spring member (34) made of a shape memory alloy such as Cu-Zn-Al system, which is interposed between the water drainage ports (29a) and biases the piston body (31) upward. There is. Therefore, at room temperature, the upward biasing force of the second spring member (34) outweighs the downward biasing force of the first spring member (33), so that the piston body (31) is pushed upward. Operating valve (3
0) closes the flow path (27a) of the valve seat head (27). When the outside air temperature approaches the freezing temperature of water, the second spring member (3
4) shortens, the piston body (31) slides downward, and the operating valve (30) opens the flow path (27a). The piston body (3
As shown in FIG. 3, in 1), the flow paths (31a) (31b) (31c) are formed at three equally distributed positions, and the operation valve (3
(0) slides downward, causing the main body (2) of the valve body (22) to
2d) through the communication hole (22c), the flow path (27a) of the valve seat head (27), and the flow paths (31a) (31) of the piston body (31).
b) The outflow passage from (31c) through the inside of the valve box (29) to the drainage port (29a) at the lowermost end is opened. In this way, when the temperature approaches the freezing temperature, water is discharged from the water pipe through the drain port (29a). Therefore,
Freezing does not occur because water will flow in the water pipe. The amount of wastewater discharged from the drainage port (29a) is determined by the shunt (23).
Fine-tuned by Further, as described above, by forming the entire device as a separated structure, the assembling property is improved, the internal parts can be easily replaced and adjusted, and the durability is improved, which is very advantageous in terms of cost. Become.

Next, the antifreezing device (21 ') shown in FIGS. 4 and 5 will be described below. The difference from the anti-freezing device (21) is that it is in the shunt (23 ') of the valve body (22') and the stopper rod (23b ') is screwed airtightly through the O-ring (35). That improves the airtightness. The antifreezing device (21 ″) shown in FIGS. 6 and 7 is the antifreezing device (2
It is a modification of 1 ') and the body (22a ") of the valve body (22")
The male thread is engraved on the to make it attachable to and detached from pipes etc. by screwing, which improves the mountability. The antifreezing device (22) shown in FIGS.
This corresponds to the antifreezing device (21 ') shown without the valve seat head (27) and nut (26'), and by doing so, downsizing of the entire device is realized and assemblability is improved. . Anti-freezing device (22 ') shown in FIGS. 10 and 11
The valve seat head (27) of the antifreezing device (21) shown in FIG. 1 and FIG.
′) Stopper bar (23b ′) on the other end to handle (36)
Since the flow path is opened and closed by the human hand and the outflow rate can be finely adjusted by human hands without using a tool such as a screwdriver, the operability is remarkably improved. Further, the shape of the valve body (22) in the above embodiment can be changed in design depending on the shape and size of the counterpart device to which the antifreezing device is attached and the piping. For example, both outlets are female sockets. May be.

The antifreezing device in the above embodiment can be used for water supply and drainage pipes of factories, petroleum boilers, hot water boilers, flush toilets and the like.

Effect of the Invention According to the anti-freezing device of the present invention, a mechanism that can be easily attached between a water pipe and a device that uses water, such as a faucet or a water heater.

Since it has a mechanism that can be manufactured in advance at another place such as a factory, product accuracy and quality are stable.

A shunt that adjusts the amount of drainage from the drainage port in the drainage mechanism, an operating valve that opens and closes the drainage port, and a second shape memory alloy that senses a change in outside air temperature and operates the operating valve in the closing direction.
The antifreezing device is composed of a combination of the spring member and the first spring member that normally biases the operating valve in the opening direction.

The mechanism is such that the operation valve of the water drain port and the stopper rod of the diversion valve that adjusts the amount of drainage are arranged at positions that do not obstruct the piping flow path.

The second spring member made of a shape memory alloy that opens and closes the actuating valve by detecting a change in the outside air temperature can be removed and replaced from the shunt that adjusts the drainage amount for draining water.

By making the actuating valve circular and made of rubber, the sealing performance can be stabilized, the sealing surface accuracy is not so required, and the actuating valve can be easily replaced.

The drainage outlet position can be freely set at 360 °.

Since the position of the water drain port is provided at the position of the low pressure chamber that is deviated from the main stream (high pressure), the difference in the opening / closing force of the valve is small. Further, the second spring member made of shape memory alloy, which is the outside air temperature sensor, can be made smaller.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of an antifreezing device according to the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is A of FIG.
-A line arrow view, FIG. 4 and FIG. 5, FIG. 6 and FIG.
FIG. 8 and FIG. 9, FIG. 10 and FIG. 11 are respectively a front sectional view and a side view showing another embodiment of the antifreezing device. 12 and 13 are schematic views showing a usage example of the conventional antifreezing device, and FIG. 14 is a front sectional view of the conventional antifreezing device. (21) (21 ') (21 ") (21) (21') ... anti-freezing device, (22) (22 ') (22") (22) (22') ... valve body, (23) (23 ′) (23 ′)… Shunt, (29) (29 ′)… Valve box, (30) (30 ′)… Operating valve, (31) (31 ′)… Piston body, (33)… First Spring member, (34) ... Second spring member.

Claims (1)

[Scope of utility model registration request] 1. A valve body, which is provided in the middle of a pipeline of an equipment pipe and has a diversion plug for allowing a fluid to be finely adjusted from the side of a main body, and is detachably attached below the valve body.
An operating valve that closes the outflow passage from the valve body is integrated, and is urged in the valve opening direction by the first spring member and is urged in the valve closing direction by the second spring member made of a shape memory alloy. Freezing prevention with a built-in slidable piston body, a water drainage port at the lowermost end, and a valve box in which a second spring member is arranged in a chamber that is in constant communication with the outside air through this water drainage port In the device, the valve seat of the diversion valve is formed in the valve body so as to be orthogonal to the pipe passage of the equipment pipe, and the outflow passage from the valve body is orthogonal to the valve seat downstream of the valve seat. And the operating valve installed in the valve box is arranged in a low-pressure chamber position displaced from the main stream (high pressure) of the pipeline of the equipment pipe via the outlet pipe from the diversion plug and the valve body. Anti-freezing device.