JPS61236972A - Diverting device of flow path - Google Patents

Abstract

PURPOSE:To prevent the damage of machinery and apparatus and diminish pressure fluctuation in a flow path system in diverting the flow path by causing the pressure of output flowing through one of two output flow paths to open or close the other output flow path, and thereby preventing the simultaneous closing of both the flow paths and therefore the occurrence of water hammering. CONSTITUTION:A flow path composing body 1 is provided with an inlet path 2 and two output flow paths 3, 4. One flow path 3 of two output flow paths 3, 4 is opened or closed by a valve body 10 formed on a plunger 11 driven by an electromagnetic coil. Output fluid pressure is led into the flow out pipe 18 of the output flow path 3 through a signal path 7, and actuates a diaphragm valve 12 to open or close the other output flow path 4. When the one output flow path 3 is kept open, the said fluid pressure closes the diaphragm valve 12.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a flow path switching device used in housing equipment such as hot water supply and space heating, and fluid application equipment such as sprinklers and cleaning equipment.

2. Description of the Related Art A conventional flow path switching device of this type has two solenoid valves arranged in parallel, or two solenoid coils disposed on a single valve body 25 and disposed at 26.27' as shown in FIG. Set up and electromagnetic carp each separately?
28 and 29, and switching control of flow paths 30 and 31 was performed.

The problem that the invention attempts to solve.

However, with the above configuration, water hammer may occur due to unbalance during switching control, such as simultaneous closing of solenoid valves, which may damage the equipment or make the operating state unstable. In addition, there are other problems, such as two solenoid valves and their control circuits, and a specially designed valve device, resulting in high costs.

The present invention solves these conventional problems, and even if the two flow paths are replaced, pressure fluctuations in the flow path system can be reduced.
The purpose is to ensure flow path switching and to allow common use with conventional dual solenoid valves.

Means for solving the problem - A first output flow path and a second output flow path whose inflow side serves as a valve seat, and an inflow path are provided in a flow path structure, and further arranged in the flow path structure. A driving means for driving a valve body that opens and closes a valve seat in the first output flow path, a diaphragm valve that opens and closes a valve seat in the second output flow path, and a pressure chamber that generates operating pressure for the diaphragm valve. and a signal path forming body forming a signal path for guiding the outlet pressure of the first output flow path into the pressure chamber.

Operation According to the above configuration, when the valve body of the first output passage is opened by the external driving means, the fluid entering from the inflow passage flows into the first output passage. On the other hand, in the second output flow path, the pressure downstream of the valve in the first output flow path is guided to the pressure chamber via the signal path, acts on the diaphragm valve, and becomes closed.

Next, when the valve body of the first output flow path is closed by the external driving means,
The fluid that has flowed in from the inlet channel does not flow into the first output channel.

On the other hand, in the second output flow path, the pressure downstream of the valve in the first output flow path disappears and the pressure in the pressure chamber also decreases, so the diaphragm valve is opened by the fluid pressure in the inflow path. As a result, the fluid that has entered the inflow channel flows to the second output channel. As described above, two flow paths can be switched with one valve body that is opened and closed by an external drive means.

Furthermore, by removing the diaphragm valve and installing the same driving means as the first output flow path, it is possible to convert the flow path switching device into a conventional two-way electromagnetic valve flow path switching device.

EXAMPLE Hereinafter, an example of the flow path switching device of the present invention will be described based on FIGS. 1 to 4.

Reference numeral 1 denotes a flow path structure in which an inflow path 2, a first output path 3, and a second output path 4 are arranged in a planar manner. Similarly, the outlet 6 forms a valve seat 7 on the inflow side of the second output passage 4, and an outlet 8 on the outflow side. 9 is a driving means, and a valve body 10 is fixed to a plunger 11. A diaphragm valve 12 is opened and closed by the internal pressure of the pressure chamber 13. Reference numeral 14 denotes a signal path forming body, one end of which is a signal inlet 16 that communicates with the outflow port 6 of the first output flow path 3; the other end of which is a signal outflow port 16 that communicates with the pressure chamber 13, and a signal path 17.
, and an outflow pipe 18 that communicates with the outflow port 6 of the first output flow path 3 and guides the flow to the outside. Reference numeral 19 denotes a spring for biasing the plunger 11 and a spring for biasing the 20-piece diaphragm valve 12.

In the above configuration, when the electromagnetic coil of the external drive means 9 is energized, the plunger 11 is pressed upward against the spring 19 and the valve body 10 is opened.

As a result, as shown in FIG.
The water flows through the outflow pipe 18 to the outside.

On the other hand, the downstream pressure of the valve seat portion 5 of the first output channel 3 is transmitted to the pressure chamber 13 through the signal inlet 15, the signal path 17, and the signal outlet 16, and presses the diaphragm valve 12. As a result, the flow path is closed and the flow to the second output flow path 3 is stopped.

Conversely, when the electromagnetic coil of the external drive means 9 is de-energized, the plunger 11 is pressed downward by the biasing force of the spring 19 and its own weight, and is closed by the flow path valve body 10. As a result, as shown in FIG. 4, the flow flowing in from the inflow path 2 pushes up the diaphragm valve 12, passes through the valve seat 7, and flows to the outside from the output port 8 of the second output flow path 4. In this case, since the valve seat portion 5 of the first output flow path 3 is closed, the fluid pressure in the pressure chamber 1a decreases, and the diaphragm valve 12
It is easily pushed up by the fluid pressure flowing in from the inflow path 2.

Next, as shown in FIG. 5, the diaphragm valve 12 and the pressure chamber 13 constituent frames are removed, and the driving means 21, valve body 22, and plunger 23 are installed in the same way as on the first output flow path a side, and the signal flow The channel forming body 14 is removed and the outflow channel 24 is installed. In operation in this configuration, when the electromagnetic coil I of the external driving means 9 is energized, the valve body 10 is opened, and the flow flowing in from the inflow path 2 flows out through the first output flow path 13. Conversely, when the driving means 9 is de-energized and the driving means 21 is energized, the valve body 10 is closed, the valve body 2a is opened, and the flow that has flowed in from the inflow path 2 flows out from the second output flow path 4. . Furthermore, when both the driving means 9 and the driving means 210 are energized, the valve body 10 and the valve body 23 are opened at the same time, and the flow flowing in from the inflow passage 2 flows into both the first output passage 3 and the second output passage 4. leaks to the outside. That is, it performs the same function as a conventional flow path switching valve.

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

(1) Two types of flow path switching devices can be created by sharing the flow path structure and driving means, resulting in low cost.

(2) In a flow path switching valve using a diaphragm valve, the diaphragm valve is opened and closed by the pressure generated when a valve body having a driving means is opened and closed. Therefore, simultaneous complete closure of the branch channels does not occur, water hammer can be prevented, and equipment inserted into the piping system can be prevented from being damaged.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a flow path switching device according to an embodiment of the present invention, Fig. 2 is a bottom view of the flow path structure of the same flow path switching device, and Fig. 3 is an operation by a driving means when the valve is closed. A sectional view showing the state, FIG. 4 shows the operating state when the valve is closed by the driving means. FIG. 6 is a sectional view of a two-driving means flow path switching device, and FIG. 6 is a sectional view of a conventional flow path switching device. 1... Channel structure, 2... Inflow channel, 3
...First outflow path, 4...Second outflow path,
5, 7... Valve seat portion, 9... Drive means,
10...Valve body, 12...Diaphragm valve, 13...Pressure chamber, 17...Signal path, 18...Outflow pipe. Name of agent: Patent attorney Toshio Nakao and one other person
--', Liaoyu Figure 1 1-6 □ 3-11 1st exit, Power Responsibility List Niu-11 2nd exit, Litou Figure 3 Figure 4

Claims (1)

[Claims] A first output flow path and a second output flow path whose inflow side is a valve seat portion, and an inflow path are provided in a flow path structure, and further drive a valve body that abuts the valve seat portion of the first output flow path. a driving means, a diaphragm valve that comes into contact with the valve seat of the second output flow path and is operated by the internal pressure of a pressure chamber into which the pressure of the first output flow path is introduced, and an output port pressure of the first output flow path; A flow path switching device including an outflow pipe forming a signal path leading to the pressure chamber.