JPH0680358B2 - Flow path switching device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow path switching device used for housing equipment such as hot water supply and heating, and fluid application equipment such as a sprinkler and a cleaning equipment.

2. Description of the Related Art Conventionally, in this type of flow path switching device, two electromagnetic valves are arranged side by side, or two electromagnetic coils 102 are arranged on a single valve body 101 as shown in FIG. The electromagnetic coil 102 is controlled to switch the flow path 103.

Problems to be Solved by the Invention However, in the above-described configuration, unbalance during switching control, for example, water hammer may occur due to simultaneous closing of solenoid valves, damage to equipment, and instability of operating state may occur. To do. Further, there are problems that the solenoid valve and its control circuit are provided in two sets, and the valve device is designed exclusively, resulting in high cost.

The present invention solves the above-mentioned conventional problems, and the pressure fluctuation of the flow path system is small even if two flow paths are switched,
The purpose is to reliably switch the flow paths and to share it with the conventional dual solenoid valve.

Means for Solving the Problems First flow passage, first valve seat, first valve downstream chamber, first flow passage communicating with first outflow passage, second flow passage, second valve seat, second valve Downstream chamber,
A valve body that opens and closes the first valve seat is provided in a flow path switching device body that includes a second flow path that communicates with a second outflow path and a signal path that derives the pressure of the first valve downstream chamber. Drive means for driving, a pressure receiving chamber constituting body for forming a pressure receiving chamber for introducing pressure from the signal path, and a diaphragm valve for opening and closing the second valve seat by the internal pressure of the pressure receiving chamber are arranged. .

The present invention has the above-described configuration, and when the first flow path opens the valve body of the first valve seat by the driving means, the fluid that has entered from the first inflow path passes through the first valve seat and the first valve downstream chamber to the first flow path. 1 Flow to the outflow path. On the other hand, in the second flow path, the pressure in the first valve downstream chamber is guided to the pressure receiving chamber via the signal path and acts on the diaphragm valve, and the second valve seat is closed.

Next, when the valve means of the first valve seat is closed by the driving means, the flow of the first flow path is stopped. On the other hand, in the second flow passage, the pressure in the first valve downstream chamber decreases and the internal pressure in the pressure receiving chamber also decreases, so the diaphragm valve is pushed open by the fluid pressure in the second inflow passage and opened. As a result, the fluid entering from the second inflow passage is
It flows through the second valve downstream chamber to the second outflow passage.

As described above, with one valve element opened and closed by the drive means,
Two channels can be switched.

Further, by removing the pressure-receiving chamber structure, closing the signal path, and disposing the same drive means provided in the first flow path, it is possible to change to a conventional dual electromagnetic switching device.

Embodiment An embodiment of the flow path switching device of the present invention will be described below with reference to FIGS. 1 to 6.

Reference numeral 1 is a flow path switching device body in which a first flow path 2 and a second flow path 3 are arranged in a plane, and the first flow path 2 is a first inflow path 4
The first valve seat 5, the first valve downstream chamber 6 and the first outflow passage 7 communicate with each other. On the other hand, the second flow path 3 is also the first flow path 2
Similarly to the second inflow passage 8, the second valve seat 9, the second valve downstream chamber
10 and the second outflow passage 11 are configured to communicate with each other. The flow path switching device main body 1 is further provided with a signal path 12 for guiding the pressure in the first valve downstream chamber 6 to the outside between the first flow path 2 and the second flow path 3. 13 is a drive means, and the valve body 14 is a plunger.
It is opened and closed with the first valve seat 5 by 15. Reference numeral 16 is a diaphragm valve, which opens and closes with the second valve seat 9 by the internal pressure of the pressure receiving chamber 18 formed by the pressure receiving chamber constituting body 17. The signal path 12 has one end provided in the first valve downstream chamber 6 and the other end provided in the pressure receiving chamber 18. 19 is a spring for urging the plunger 15, 20 is a spring for urging the diaphragm valve 16, and 21 is an electromagnetic coil. In this embodiment, the first
The flow path 2 and the second flow path 3 have the same shape. Also, the valve body
The 14 and the diaphragm valve 16 are also the same.

In the above structure, when the electromagnetic coil 21 of the driving means 13 is energized, the plunger 15 is pressed upward against the spring 19 and the valve body 14 is opened. As a result, as shown in FIG. 3, the flow that has flowed in through the first inflow passage 2 passes through the first valve seat 5 and the first valve downstream chamber 6 and flows through the first outflow passage 7 to the outside. On the other hand, the fluid pressure in the first valve downstream chamber 6 is transmitted to the pressure receiving chamber 18 through the signal path 12 and presses the diaphragm valve 16. As a result, the second valve seat 9 is closed and the flow to the second flow path 3 is stopped.

On the contrary, when the energization of the electromagnetic coil 21 of the driving means 13 is stopped, the plunger 15 is pressed downward by the urging force of the spring 19 and its own weight, and the first flow path 2 is closed by the valve body 14. As a result, as shown in FIG. 4, the second inflow passage 3
The flow coming in from pushes up the diaphragm valve 16 and
It flows through the valve seat 9 and the second valve downstream chamber 10 and flows to the outside through the second outflow passage 11. In this case, since the first valve seat 5 is closed, the fluid pressure in the first valve downstream chamber 6 decreases, and therefore the internal pressure in the pressure receiving chamber 18 also decreases, and the diaphragm valve 16 flows in from the second inflow passage 3. It is easily pushed up by the fluid pressure.

Next, as shown in FIG. 5, the pressure receiving chamber constructing body 17 is removed,
As in the case of the first flow path 2, the drive means 22 is attached and the signal path 12
Close up. The operation in this configuration is such that when the electromagnetic coil 21 of the driving means 13 is energized, the valve body 14 is opened, and the flow flowing in from the first inflow passage 4 passes through the first valve seat 5 and the first valve downstream chamber 6. It flows to the outside through the first outflow passage 7. On the contrary, when the driving means 13 is stopped and the driving means 22 is energized, the valve body 14 is closed, the diaphragm valve 16 is opened, and the flow flowing in from the second inflow passage 8 is the second valve seat 9 and the second valve downstream. 2nd outflow part 11
Flows to the outside via. That is, the same operation as that of the conventional flow path switching device is performed.

According to this embodiment, since the first flow path 2 and the second flow path 3 have the same shape and the valve body 14 and the diaphragm valve 16 have the same shape, the cost of the molding die can be reduced.

Next, another embodiment of the present invention will be described with reference to FIG. 6 is different from the above embodiment in that the pressure receiving chamber constituting body 23 and the driving means 24 are integrally formed, the valve body 25 is fixed to the plunger 26 of the driving means 24, and the signal path 27 flows. It is configured on the upper surface of the route switching device body 1. According to this structure, the signal path 27 is located on the upper surface of the flow path switching device main body 1, so that the processing is facilitated. For example, in the case of resin molding, the signal path 27 can be formed by simply pulling out the mold. or,
Since the dimensional restrictions of the signal path 27 are reduced, the signal path 27 can be configured to be large, and clogging due to water stain or the like can be prevented.

Effects of the Invention As described above, according to the flow path switching device of the present invention, the following effects are obtained.

(1) The drive means can be switched between two directions, and the flow path switching device can be made compact and at the same time the cost can be reduced.

(2) The other diaphragm valve is opened and closed by opening and closing the valve body by the driving means. Therefore, the two flow paths are not completely closed, water hammer is prevented from occurring, and damage to the pressure supply source such as a pump can be prevented.

(3) By changing the pressure receiving chamber structure to drive means,
Since it can also be used as a conventional double solenoid valve, it has a wide range of applications and can be easily replaced with a conventional solenoid valve.

[Brief description of drawings]

FIG. 1 is a sectional view of a flow path switching device according to a first embodiment of the present invention, FIGS. 2 (a) and 2 (b) are side sectional views of the flow path switching device, and FIG. FIG. 4 is a sectional view showing an operating state when the valve is opened by the drive means of the apparatus, FIG. 4 is a sectional view showing an operating state when the valve is closed by the drive means of the flow path switching device, and FIG. 6 is a cross-sectional view showing the path switching device, FIG. 6 is a cross-sectional view of the flow path switching device in the second embodiment, FIG. 7 (a),
(B) is sectional drawing of the conventional flow-path switching apparatus. 1 ... Flow path switching device main body, 2 ... First flow path, 3 ... Second
Flow path, 4 ... First inflow path, 5 ... Second valve seat, 6 ... First
Valve downstream chamber, 7 ... first outflow passage, 8 ... second inflow passage, 9 ...
… Second valve seat, 10 …… Second valve downstream chamber, 11 …… Second outflow passage,
12 ... Signal path, 13 ... Driving means, 14 ... Valve element, 16 ... Diaphragm valve, 17 ... Pressure receiving chamber structure, 18 ... Pressure receiving chamber.

Claims (1)

[Claims] 1. A first flow passage communicating with a first inflow passage, a first valve seat, a first valve downstream chamber, and a first outflow passage, a second inflow passage, a second valve seat, a second valve downstream chamber, In the first flow path of the flow path switching device body that forms a second flow path that communicates with the second outflow path, a valve body that abuts the first valve seat and drive means that drives the valve body, A diaphragm valve that abuts the second valve seat and a pressure receiving chamber that operates the diaphragm valve are provided in the second flow path, and a signal path that derives the pressure of the first valve downstream chamber flows in the pressure receiving chamber. Flow path switching device provided in the main body.