JPH08312832A - Branch valve - Google Patents

Abstract

PURPOSE: To switch and drain liquid by the temperature of liquid by sensing the temperature of liquid by a branch part which is arranged together with a first leading pipe connecting part, and switching liquid taken into the first leading pipe connecting part into either one of second or third leading pipe connecting part which are led out from the branch part. CONSTITUTION: A branch part 2 arranged on the end part of a first leading pipe connecting part 1 is constituted by caps 3, 4 connected to first, second, and third leading pipe connecting parts 1, 5, 6. A shielding plate 9 is arranged, which is constituted by a shielding surface 7 on which end parts of the second and third leading pipe connecting parts 5, 6 are slid on the inner part thereof, and a projection piece 8 on the opposing surface thereof. In the shielding plate 9, a shape memory alloy spring 10 for pushing the projection piece 8 and a bias spring 16 are formed, and they are built in a cap 4 so as to slide the end part of the second and third leading pipe connecting parts 5, 6 and close one way by the shielding surface. By the temperature of liquid which flows in the first leading pipe connecting part 1, selection is carried out whether the shape of the shape memory alloy spring 10 arranged on the branch part 2 is returned into a shape before deformation, or it is deformed by the force of the bias spring 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch valve, and more particularly to a branch valve for switching a liquid that has been conducted through a conduit to a conduit selected from two depending on the temperature of the liquid to conduct the water. is there.

[0002]

2. Description of the Related Art As a conventional technique, there is a so-called mixing valve which switches or mixes hot water and water and introduces them into one water pipe. In this method, a water conduit and a hot water conduit are connected to a valve, and the valve is adjusted to mix water and hot water and guide the mixed water to the mixing conduit. However, there was no branch valve that switched the liquid flowing through the conduit to the water distribution pipe selected from the two depending on the temperature of the liquid to conduct the water. On the other hand, in order to prevent freezing of piping such as water heaters, we considered a piping configuration that circulates hot water at a temperature that does not freeze inside the piping, but it is just the opposite of the mixing valve, that is, the liquid that has conducted through the conduit is the liquid It is necessary to have a branch valve that can be switched depending on the temperature, and we considered a branch valve to be used for it.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a branch valve in which a liquid that has been conducted through a conduit is switched to one of two water conduits depending on the temperature of the liquid to conduct water. It is in.

[0004]

According to the present invention for achieving the above object, a first conduit connecting portion for conducting a liquid, a branch portion attached to the first conduit connecting portion, and a branch portion are provided. It is composed of second and third conduit connection parts to be led out, the branch part senses the temperature of the liquid, and the liquid introduced into the first conduit connection part is passed through the second conduit connection part or the third conduit connection part. It is a branch valve characterized by switching between passing through. More preferably, the second and third conduit connection parts are led out from the branch part in the same direction, and the first conduit connection part is led out from the branch part in the opposite direction to the second and third conduit connection parts. At the same time, the shape memory alloy spring and the bias spring are branched from each other through the shield plate binding either one of the second and third conduit connection parts in the branch part and the projecting piece protruding from the shield plate. It is characterized in that it is attached so as to press into the inside of the section. More preferably, the second and third conduit connecting portions lead out in opposite directions from the branch portion, and the first conduit connecting portion leads out from the branch portion in a direction orthogonal to the second and third conduit connecting portions. , A shielding plate for binding either one of the second and third conduit connection parts in the branch part, and a shield wall for the shape memory alloy spring and the bias spring, the adjusting wall being provided in the branch part and in the branch part. The feature is that they are attached so as to push each other. More preferably, the second and third
Of the second conduit connection part of the second conduit connection part in the branch part in the same direction as the fulcrum, the first conduit connection part of the second conduit connection part in the opposite direction from the branch part. 2. A branch valve according to claim 1, wherein a shield plate that binds one side and both faces of the shield plate are installed so as to be pressed against each other by a shape memory alloy spring and a bias spring by inner walls of the branch part.

[0005]

According to the above configuration of the present invention, the switching of whether to guide the liquid to the second conduit connection portion or the third conduit connection portion depending on the temperature of the liquid flowing into the first conduit connection portion, A shield plate sandwiched by a shape memory alloy spring and a bias spring in the branch portion senses the temperature of the liquid flowing from the first conduit connection portion by the shape memory alloy spring, and the temperature of the hot water is equal to or higher than a certain value. The shape memory alloy spring then returns to its pre-deformation shape so that the shield plate closes the second conduit connection and releases the third conduit connection, allowing the liquid flowing into the first conduit connection to be removed first. 3 to the conduit connection portion.
On the other hand, if the temperature of the liquid flowing from the inside of the first conduit connection portion is equal to or lower than a certain value, the shape memory alloy spring loses its deforming force, and the force of the bias spring blocks the third conduit connection portion by the shield plate. The second conduit connection part is released to guide the liquid flowing into the first conduit connection part to the second conduit connection part.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an embodiment of the present invention.
A branch 2 is provided at the end of the first conduit connection 1. The branch portion 2 is a cap A3 connected to the first conduit connection portion 1.
And a cap B connecting the second and third conduit connection parts 5 and 6
4, a shield surface 7 that slides the end portions of the second and third conduit connection portions inside thereof, and a convex piece 8 that is convexly provided on a surface that is not a sliding side surface of the shield surface. A plate 9 is provided, and the shielding plate 9 presses the projecting pieces 8 against each other so that the shielding surface of the shielding plate slides on the ends of the second and third conduit connection portions and closes one of them. The shape memory alloy spring 10 and the bias spring 16 are incorporated between the caps B. As a mechanism of operation, whether the liquid flowing into the first conduit connection portion 1 returns to the shape before deformation of the shape memory alloy spring provided in the branch portion 2 or is deformed by the force of the bias spring depending on its temperature. It is a choice. The operating temperature range of the memory alloy spring is preferably 35 ° C to 100 ° C. FIG. 2 shows a second embodiment of the invention of the present application. This is an improvement in the structure of the branch part 2. That is, by improving the cross-section of the shield plate 9 from a substantially T-shape to a substantially H-shape, the assemblability is improved, and the cap B on the second conduit connection portion side and the third conduit connection portion side where the shielding surface of the shield plate contacts. Resin material with sliding effect on inner surface 1
1 (for example, a material having good slidability such as polyacetal) is attached. Next, FIG. 3 shows a third embodiment of the present invention. Cylindrical branch 2 with one end closed
And the side walls of the bifurcating part of the tubular part are displaced from each other so that the second and third conduit connecting parts 5 and 6 are led out in opposite directions, and the first conduit connecting part 1 is located at the open end of the tubular branch part. It is provided. A shield plate 9 for conducting the liquid in the first conduit by selecting either the second conduit connection part or the third conduit connection part is provided in the branch part, and the shield plate and the closed surface of the branch part are provided. The shape memory alloy spring 10 is provided between the shield plate and the stop ring 12 provided on the opening end side of the branch portion. Next, FIG. 4 shows a fourth embodiment of the present invention. A branch 2 is provided at the end of the first conduit connection 1. The branch portion 2 includes a cap A3 that is connected to the first conduit connecting portion and is connected to the first conduit connecting portion 2, and the second and third conduit connecting portions 5,
It is composed of the cap B4 attached to 6 and the second
The shield plate 20 is rotatably attached to the end portion of the third conduit connecting portion and the end portion of the third conduit connection portion as fulcrums, and the bias spring 16 is provided between one surface of the shield plate and the inner surface of the cap B, and the other shield plate. The shape memory alloy spring 10 is provided between the surface of the above and the cap B. Next, an example in which this branch valve is incorporated is shown in FIG. Figure 5
Shows an antifreezing system for the conduit connected to the solar water heater 13 when it is installed. Conventionally, an antifreezing heater is wound around the conduit, but since the solar water heater is generally installed on the roof, the conduit 21 is long and the antifreezing heater used for the antifreezing of the pipe is about 800 watts. It has a drawback that it is required, the running cost is high, and it is difficult to construct because it is wound around the pipe. Instead, the branch valve 22 of the present invention is
Installed near the solar water heater on the water supply side, the heater 14
The present invention is to devise a system in which low-temperature hot water heated to 0 W is circulated to a circulation path 23 provided in a part of the water supply side conduit to prevent water in the piping from freezing. The system shown in FIG.
The low-temperature hot water heated by the heater 14 via the check valve 2
In this system, the water in the pipe of the water supply side conduit 25 is prevented from freezing by passing through the conduit 15 to the high temperature side of the branch valve and then to the circulation path 23 to prevent freezing. When the hot water heated by the heater 14 circulates and reaches the branch valve 23, the branch valve switches to the high temperature side in which water flows during freeze prevention,
The low-temperature hot water circulates through the circulation path to the conduit 15. When the cock 24 on the water supply side is opened and the hot water stored in the solar water heater 13 is pushed out by the water pressure on the water supply side, the water temperature on the water supply side decreases, and as a result, the branch valve switches to the low temperature side and the hot water supply side is connected to the inside of the solar water heater. This is to derive hot water. The branch valve of the present invention is not limited to the above embodiment.

[0007]

As described above, it is possible to provide the branch valve in which the liquid that has been conducted through the conduit is switched to one of the two conduits depending on the temperature of the liquid and drained.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention.

FIG. 2 is a second embodiment of the present invention.

FIG. 3 is a third embodiment of the present invention.

FIG. 4 is a fourth embodiment of the present invention.

FIG. 5 shows an example in which the branch valve of the present invention is incorporated.

[Explanation of symbols]

 1 1st conduit connection part 2 Branch part 3 Cap A 4 Cap B 5 2nd conduit connection part 6 3rd conduit connection part 7 Shielding surface 8 Convex piece 9 Shielding plate 10 Shape memory alloy spring 11 Resin material 12 Stop ring 13 Solar Water Heater 14 Heating Section 15 Water Flow Tube for Freezing Prevention 16 Bias Spring

Claims (4)

[Claims] 1. A first conduit connection for conducting liquid,
It is composed of a branch part provided adjacent to the first conduit connection part, and second and third conduit connection parts led out from the branch part. The branch part senses the temperature of the liquid, and is connected to the first conduit connection part. A branch valve, wherein the taken-in liquid is passed through by switching the liquid to either the second conduit connection portion or the third conduit connection portion. 2. A second and a third conduit connection part lead out in the same direction from the branch part, and a first conduit connection part leads out in the opposite direction from the branch part to the second and third conduit connection parts. At the same time, the shape memory alloy spring and the bias spring are branched from each other through the shield plate binding either one of the second and third conduit connection parts in the branch part and the projecting piece protruding from the shield plate. The first feature is that they are attached to each other so as to be pressed against each other.
A branch valve according to the claims. 3. The second and third conduit connecting parts lead out in opposite directions from the branch part, and the first conduit connecting part draws out from the branch part in a direction perpendicular to the second and third conduit connecting parts. With
A shield plate for closing one of the second and third conduit connection parts in the branch part, and a shield plate for the shape memory alloy spring and the bias spring, which are mutually in phase, of the wall of the branch part and the adjusting wall provided in the branch part. The branch valve according to claim 1, wherein the branch valve is mounted so as to press each other. 4. The second and third conduit connecting portions lead out in the same direction from the branch portion, the first conduit connecting portion leads in the opposite direction from the branch portion, and the second and third conduit portions extend in the branch portion. A shield plate that closes one of the conduit connection parts with one end as a fulcrum, and both surfaces of the shield plate are incorporated so that the shape memory alloy spring and the bias spring press each other on the inner wall of the branch part. The branch valve according to claim 1.