JPH1137322A - Five-way switch valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a five-way switch valve which can be easily operated, is small-size and light-weight, and can provide high productivity. SOLUTION: A principal part of a five-way switch valve 10 has a structure where a three-way valve 21 and two two-way valves 25a, 25b are mounted on a water passage 13 extending in the axial direction, and comprising an intake port 14, a pair of filter connection ports 16a, 16b, and a pair of outlet port/drain port 18, 19 arranged in series, and the total five-way switch valve is formed by assembling a link type interlocking mechanism 35 for communicating the three-way valve 21 and the two-way valves 25a, 25b in a predetermined manner by the rotating operation of a single operation handle 31 for switching two modes, that is, 'flow suitable for filtering' and 'flow suitable for back wash', in the principal part. Whereby the small-size and light-weight simple structure of high productivity can be obtained, and the specific passages can be switched by the operation of the valve only by the rotating operation of the single operation handle 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a five-way switch used to switch the flow of water, for example, to feed raw water to a filter, or to feed raw water from a reverse direction to wash a filter medium of the filter. About the valve.

[0002]

2. Description of the Related Art As equipment for purifying water such as well water,
Filters are known. Filters filter raw water such as well water with a filter medium to obtain purified water, but after a certain period of use,
There is a problem that the filter medium is clogged and the filtering effect is reduced.

[0003] Therefore, the filter is provided with a backwashing function by flowing raw water in a direction opposite to the flow of water at the time of filtration to remove deposits attached to the filter medium (washing the filter medium). Has been done.

In order to selectively use the filtering function and the backwashing function, a switching valve is connected to the inlet / outlet of the filter, and the switching operation of the switching valve makes the flow path of the filter forward or reverse. Is adopted.

[0005] By the way, in order to exhibit the backwashing function, the switching valve itself is connected to various external connection ports necessary for obtaining purified water from the filter, that is, an intake port for taking in raw water and a filter. / A pair of filter connection ports for connection to the outlet, a drain port for discharging treated water after filtration, and a drain for draining water after washing (backwashing) of the filter You need a mouth.

Therefore, a five-way switching valve having five external connection ports is usually used for switching between the "filtration function" and the "backwashing function". And, using this five-way switching valve,
The raw water from the intake port is selectively guided to one of a pair of superficial connection ports connected to the inlet / outlet of the filter, and further, the raw water is switched by selecting one of the water outlet and the drain. The flow of water is switched between "when filtering" and "when backwashing the filter medium".

Specifically, conventionally, a five-way switching valve used in such a filter has a combination of one manual three-way valve, two manual two-way valves, and various piping members. , The valve device is configured so as to obtain a desired flow path switching, that is, a “flow of raw water suitable for filtration” and a “flow of raw water suitable for backwashing”, and each of the three-way valve and the two-way valve is configured. , The filter function and the backwash function were switched.

In the five-way switching valve, a single valve mechanism for obtaining "flow of raw water suitable for filtration" and "flow of raw water suitable for backwashing" is incorporated in a single valve box. Using the valve device,
Switching between the "filtration function" and the "backwashing function" has also been performed by simply operating a single valve mechanism.

[0009]

As with other equipment, the five-way switching valve is required to be easy to operate, have high productivity, and be small and lightweight. However, since the former five-way switching valve has a manual structure in which the three-way valve and the two-way valve must be individually operated, the valve operation for switching the flow path is troublesome.

[0010] In addition, the five-way switching valve has to be laid out with piping members around the three-way valve and the two-way valve, so that it tends to be structurally complicated and the productivity is low.
In addition, the layout of the piping members increases the size of the entire five-way switching valve and also tends to increase the weight burden.

Since the latter five-way switching valve operates a single valve mechanism, the operability is good, but each part of the single valve mechanism and five external parts are provided inside a single valve box. Due to the necessity of combining with the connection port, the water passage connecting the valve mechanism and each external connection port tends to have a complicated shape due to the structure, and the structure of the valve box is likely to be considerably complicated. Can be Therefore, productivity is very low.

In addition, since a single valve mechanism performs various switching operations, a structure for rationally performing the switching operation and a structure for compensating for the load on the seal are required, and the number of parts tends to increase. Therefore, the size and weight cannot be reduced.

Therefore, there is a demand for a five-way switching valve capable of realizing the various points described above. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a five-way switching valve which is simple in valve operation, excellent in miniaturization and weight reduction, and which can provide high productivity. Is to do.

[0014]

In order to achieve the above object, a five-way switching valve according to claim 1 is provided with a valve box in which a water passage extending in an axial direction is formed, and a valve housing in the center of the water passage in the axial direction. First
Are formed, a pair of second connection ports are formed on both sides sandwiching the first connection port, and a pair of third connection ports are formed on the fourth connection port on both ends of the water passage. Five external connection ports arranged in series along the water passage, and a three-way valve for selectively switching between the first connection port and water passage portions on both sides sandwiching the connection port in the axial center of the water passage. A valve mechanism having a two-way valve for opening and closing the water passage portion between the water passage portion between the second connection port and the third connection port, and a single operation handle. And an interlocking mechanism for simultaneously switching the three-way valve and each of the two-way valves in conjunction with the turning operation of the operation handle, and switching each part of the water passage to a predetermined flow direction according to the turning operation of the operation handle. A three-way valve and a two-way valve are installed in a water passage with a simple shape by adopting a valve structure with While realizing a simple productivity excellent valve structure of that is that the realized switching simple valving.

That is, according to the five-way switching valve of the first aspect, the main part is a shaft in which the first connection port, the pair of second connection ports, and the pair of third connection ports are simply formed in series. It is a structure in which only a three-way valve and two two-way valves are installed in a water passage extending in the direction.

That is, the main part of the five-way switching valve has a simple valve structure excellent in miniaturization and weight reduction, and has a structure excellent in productivity. The operating part of the five-way valve switching valve has a structure in which, when a single operating handle is operated, the three-way valve and each two-way valve switch the flow of each part of the water passage in a predetermined flow direction. The required valve operation is simple.

As a result, it is possible to realize a five-way switching valve which is small and lightweight, improves productivity, and simplifies valve operation. In order to provide a switching valve suitable for switching between the "filtration function" and the "backwashing function" of the filter in addition to the above-mentioned purpose, the water supply device according to claim 2 has a first connection port for supplying raw water. An intake port for intake, a pair of second connection ports as a filter connection port connected to the inlet / outlet of the filter, and a pair of third connection ports for discharging treated water after the filtration process. A water outlet and a drain for draining backwashed water, and an interlocking mechanism, when the operation handle is turned to one side, between the water intake and the second connection port connected to the inlet of the filter. When the operation handle is rotated to the other side, the communication between the water intake port and the second connection port connected to the outlet of the filter is made, and the second port connected to the drain port and the inlet of the filter. In such a manner as to communicate with the connection port.

[0018] The water supply device according to claim 3 has the above object,
In order to make switching operation more reliable with a simpler and smaller footprint, the interlocking mechanism of the operation unit is located outside the valve box and the center is fixed to the stem of the three-way valve. And an arm member having both ends formed to extend toward each two-way valve, and an arm member disposed outside the valve box, one end of which is fixed to the stem of each two-way valve, and the other end of which is provided at each end of the arm member. A link mechanism having a lever member pivotally supported so as to be displaceable in the arm direction is provided, and an operation handle of the operation unit is formed of a single lever member formed in a part of the link mechanism.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on a first embodiment shown in FIGS. FIG. 3 shows a schematic configuration of a filtration system for purifying raw water such as well water and supplying it to the water supply. In the figure, reference numeral 1 denotes a water supply device constituted by a pump for pumping raw water such as well water, and 2 denotes a case, for example. 3 is a filter in which a filter medium 4 is accommodated inside and a case 5 has an inlet 5 and an outlet 6 on the outer surface of the case.

A five-way switching valve 10 having five external connection ports is connected between the discharge section 1a of the water supply device 1 and the input / output ports 5 and 6 of the filter 2. By switching the five-way switching valve 10, a mode in which the raw water from the water supply device 1 is filtered by the filter medium 4 of the filter 2 and a mode in which the raw water is
The process is switched to a mode for removing the deposits adhering to the filter, that is, a mode for backwashing the filter medium 4.

FIGS. 1A, 1B and 2 show the structure of a five-way switching valve 10 which is a main part of the present invention. Here, FIG. 1A is a plan sectional view of the five-way switching valve 6,
FIG. 2B is a plan view, FIG. 2C is a vertical sectional view, and FIG. 2 is a side sectional view.

The five-way switching valve 10 will be described with reference to the drawings. In the drawings, reference numeral 11 denotes a cylindrical valve box. Valve box 11
Is formed, for example, by connecting a plurality of tubular parts 12a and 12b in series so as to be separable, and forms a water passage 13 extending linearly in the interior along the axial direction.

In the water passage 13, five external connection ports are arranged in series along the water passage 13. More specifically, short cylindrical connection ports 14, 15 a, 15 are respectively provided on the axial center of the valve box 11 and on both sides of the valve body 11 sandwiching the center.
b is formed. In addition, short cylindrical connection ports 17a and 17b are respectively connected to both ends of the valve box 11, for example, both ends so as to be splittable. Then, at a connection port body 14 located at the center in the axial direction of the water passage 13, an intake port 14 for taking in raw water.
a (corresponding to the first connection port), and the connection port bodies 15a and 15b in the water passage portions on both sides of the water intake port 14a,
A pair of filter connection ports 16a, 16b connected to the filter 2
(Corresponding to a pair of second connection ports) was formed, and backwashing with the water discharge port 18 for discharging the treated water after the filtration process was completed at the connection port bodies 17a and 17b at both ends of the water passage 14. A drain port 19 for draining water (each of which corresponds to a third connection port) is formed.

Note that the water intake 14a is provided for easy piping.
The filters are arranged so as to face in opposite directions to the filter connection ports 16a and 16b. Then, among these external connection ports, the water intake port 14a is connected to the discharge section 1a of the water supply device 1, the filter connection ports 16a and 16b are connected to the inlet 5 and the outlet 6 of the filter 2, and the water outlet 18 is connected. The equipment of the equipment that uses the filtered water, for example, is connected to a faucet (not shown), and the remaining outlet 19 is connected to, for example, a drainage equipment (not shown).

In the water passage 13, a valve mechanism 20 for switching between the "filtration function" and the "backwashing function" of the filter 2 is housed. In this valve mechanism 20, a three-way valve 21 is accommodated in the center of the water passage 13 in the axial direction, and between the filter connection ports 16a, 16b and the water intake port 18 / the drain port 19 at equal intervals from the three-way valve 21. The structure which accommodates the two-way valves 25a and 25b respectively is adopted.

Specifically, the three-way valve 21 includes the cylindrical part 1
Using the divisible structure of 2a, 12b, the intake 14
A spherical seat 22 is assembled on the inner surface of the water passage 13 where the water passage 13 intersects with the water passage 13, and an L-shaped (substantially 90 °) switching passage 23 a is formed in the spherical seat 22. A structure is adopted that incorporates only the main components that are rotatably assembled in the direction of the water passage.

The stem 23b (portion defining the direction of rotation of the valve body 23) implanted in the valve body 23 is
If the stem 23b is turned (90 degrees) to the water outlet side or the water outlet side by slidably penetrating the peripheral wall of the valve box 11 and protruding out of the valve box, the L-shaped switching path 23a is formed. It moves around the axis of the stem 23b. This L
Using the rotation (90 degrees) of the U-shaped switching path 23a to the water outlet side or the water outlet side, the water intake 14a and each water passage on both sides of the water intake 14a, specifically, the water intake 14a. The chamber portion 13a formed between the three-way valve 21 and the two-way valve 25a or the chamber portion 13b formed between the three-way valve 21 and the two-way valve 25b is selectively communicated. .

Both of the two-way valves 25a and 25b utilize the splittable structure of the connection ports 17a and 17b.
Filter connection ports 16a, 16b, each water outlet 18, drain port 1
9 are provided on the inner surface of the water passage 13 between the spherical seats 26, respectively.
And a spherical valve body 27 in which an I-shaped switching path 27a is formed in each spherical seat 26 is rotatably mounted in the direction of a water passage. .

The stem 27b (portion defining the direction of rotation of the valve body 27) implanted in the valve body 27 is
The stem 23b slidably penetrates the peripheral wall of the valve box 11 and
It protrudes out of the valve box in the same direction as (three-way valve 21).
By rotating (90 degrees) the stem 27b to the water outlet side or the drain port side, the I-shaped switching path 27a moves around the axis of the stem 27b, and
The water passages between the a, 16b and the water outlet 18 and the drain 19 are "open" or "closed".

The three-way valve 21 and the two-way valves 25a, 25
An operation unit 30 for operating b is assembled. The operation unit 30 includes a single operation handle 31 and a three-way valve 21 and a two-way valve 25 in conjunction with a rotation operation of the operation handle 31.
A structure is adopted in which the inside of the water passage 13 is switched between "flow of raw water suitable for filtration" and "flow of raw water suitable for backwashing" by combining with an interlocking mechanism 35 for simultaneously performing the switching operation of a and 25b.

That is, the interlocking mechanism 35 includes the stem 23
An arm member, for example, a central portion of an arm 36 formed in a substantially T-shape is fixed to an end (projecting end) of the b (three-way valve 21), and a lever member is attached to each stem 27b (two-way valve 25a, 25b). For example, a band-shaped arm 37 formed in an approximately I shape
Arm 3 that fixes one end of
A link type is used in which the both ends of each arm 6 and the other end of each arm 37 are pivotally displaceable in the arm direction.

More specifically, the arm 36 is
The center of a is fixed to the stem 23b, and both ends of the short portion 36a extend in a direction following the intermediate position of the switching path 23a, that is, a direction extending between both open ends of the switching path 23a.
And the short part 36 which goes to the two-way valve 25a, 25b side
a, for example, a pin member 39 projecting upward.
(Engaging member) is attached.

The other end of each arm 37 attached to each stem 27b extends inward (in the direction toward the central three-way valve 21) along the direction following the neutral position of the switching path 27a. I have. On the plate surface part that forms these other ends,
An elongated hole 40 extending in the arm direction is formed.

Pin members 39 at both ends of the arm 36 are slidably inserted into the elongated holes 40 of the arms 37, and the arms 36 and 37 can be displaced and rotated in the arm direction. It is movably supported.

A link mechanism 38 for switching the three-way valve 21 and the two-way valves 25a, 25b simultaneously and in a predetermined manner is constituted by the connection structure of the arms 36, 37. More specifically, the link mechanism 38 includes a three-way valve 21 in the chamber 13a.
Is selected, the two-way valve 25a is closed and the two-way valve 25b is opened, and from this state, the three-way valve 21 is switched to the side for selecting the chamber 13b. 1B, the angle formed between the arm 36 and the arm 37 is reduced by sliding and rotating the pin member 39 with respect to the long hole 40, and the angle becomes zero.
(Straight), and then increase in the opposite direction as shown in FIG.
The two-way valve 25a is configured to open and the two-way valve 25b is closed.

Of course, it is specified that the switching of these two-way valves 25a and 25b is performed within the switching range of the three-way valve 21, that is, the rotation range of up to 90 degrees. The operation handle 31 is a part of the link mechanism 38, for example, the arm 36.
Is formed of a lever-like long portion 36b (corresponding to a lever member) projecting toward the side of the valve box 11 from the short portion 36a.

Then, by turning the longitudinal portion 36b to the right (the other side), the inlet 5 of the filter 2 is selected and the water intake 18 is selected at the same time, so that the raw water from the water supply device 1 is supplied. The flow path is switched to the flow path in the forward direction with respect to the filter 2, and the outlet 6 of the filter 2 is selected at the same time as the outlet 6 of the filter 2 is selected by rotating the longitudinal portion 36 b to the left (one side). As a result, the flow path is switched to the flow path in which the raw water from the water supply device 1 flows in the opposite direction to the filter 2.

That is, to obtain purified water in the filtration system, the operation handle 31 is rotated counterclockwise (rightward) (90) as shown in FIG.
Degree).

Then, the rotational displacement of the operation handle 31 is transmitted to the valve element 23 of the three-way valve 21 via the arm 36 and the stem 23b, and as shown in FIG. The switching path 23a allows communication between the water intake port 14a and the filter connection port 16a (the inlet 5 of the filter 2) on the inlet side.

The rotational displacement of the operating handle 31 is simultaneously performed by the pin member 3 from both ends of the short portion 36a of the arm 36.
9, transmitted to the stem 27b of each of the two-way valves 25a and 25b through the arm 37, and as shown in FIG. 5A, the two-way valve 25a on the water outlet side is "opened" and the two-way valve on the water outlet side is opened. Valve 25b
Is switched to “closed”.

Then, the water outlet 18 communicates with the outlet-side filter connection port 16b (the outlet 6 of the filter 2), and the drain port 19
The flow path from to the inlet 5 of the filter 2 is blocked. By switching the three-way valve 21 and the two-way valves 25a and 25b, the combination of the communicating part and the blocking part in the cylindrical water passage 13 causes the “flow path suitable for raw water filtration”, that is, FIG. As shown in (1), a forward flow path is formed from the water intake 14a to the water outlet 18 via the inlet 5 and the outlet 6 of the filter 2.

Thus, the raw water from the water supply device 1 taken in from the water inlet 14a is guided to the inlet 5 of the filter 2, and is guided to the outside of the five-way switching valve 10, that is, to the filter medium 4 of the filter 2. . Then, purified water (filtration treated water) obtained by passing through the filter medium 4 returns from the outlet 6 of the filter 2 to the inside of the five-way switching valve 10 again, and from the water outlet 18 to a faucet (not shown).
Led to.

During use in the “filtration mode”, the filter medium 4
When the filter medium 4 is backwashed in order to eliminate the clogging, the operation handle 31 is rotated clockwise (leftward) on the opposite side (90) as shown in FIGS.
Degree).

Then, as described above, the rotational displacement of the operation handle 31 causes the arm 36 and the stem 23 to move.
b to the valve element 23 of the three-way valve 21,
As shown in (a), (c) and FIG. 5 (b), the L-shaped switching path 23a of the valve body 23 allows the intake port 14a and the filter connection port 16b on the outlet side (the outlet 6 of the filter 2). And communicate with each other.

Also, as described above, the operation handle 31
Of the two-way valve 2 from both ends of the short portion 36a of the arm 36 via the pin member 39 and the arm 37 at the same time.
5a, 25b, and transmitted to the stem 27b.
As shown in (c) and FIG. 5 (b), the two-way valve 25a on the water outlet side is "closed" and the two-way valve 25b on the water outlet side is "open".
Is switched.

Then, the drain port 19 communicates with the filter connection port 16a (the inlet 5 of the filter 2) on the inlet side, and the water outlet 18
The flow path from to the outlet 6 of the filter 2 is shut off. By switching the three-way valve 21 and the two-way valves 25a and 25b, the combination of the communicating part and the blocking part in the cylindrical water passage 13 causes the "flow path suitable for backwashing", that is, FIG.
A flow path in the opposite direction is formed from the water intake 14a as shown in (b), through the outlet 6 and the inlet 5 of the filter 2, to the drain 19.

As a result, the raw water from the water supply device 1 taken in from the water intake 14a is guided to the outlet 6 of the filter 2, and is guided to the outside of the five-way switching valve 10, that is, to the filter medium 4 of the filter 2. . Then, the water from which the deposits attached to the filter medium 4 have been removed is returned from the inlet 5 of the filter 2 to the five-way switching valve 1 again.
After returning to 0, the water is drained to the outside through the drain 19.

As described above, the five-way switching valve 10 in which the three-way valve 21 and the two-way valves 25a and 25b are installed in series with the water passage 13 having a simple shape, and these valves are operated by the single operation handle 30. It can be seen that a predetermined switching operation is performed.

That is, the required switching operation can be realized by the simple five-way switching valve 10. Therefore, it is possible to provide the five-way switching valve 10 which is small and lightweight. Moreover, the main part of the five-way switching valve 10 includes a three-way valve 21 and a two-way valve 25 in the water passage 13.
The five-way switching valve 10 has a high productivity because it has a simple structure in which the number of parts is reduced, that is, a and 25b are installed in series.

In particular, since existing mass-produced valve parts can be used as they are for the parts of the five-way switching valve 10, this leads to high productivity. Of course, this high productivity is due to the fact that a special sealing structure is not required.

In addition, since the three-way valve 21 and the two-way valves 25a and 25b are simultaneously operated by the single operation handle 30, the valve operation is simple and excellent in operability.
In particular, the five-way switching valve 10 has a “filtration function” and a “backwash function”.
Each connection port is determined for each application so as to correspond to the function switching between the three-way valve 21 and the communication position of the three-way valve 21 and the open / close position of the two-way valves 25a and 25b are linked by the interlocking mechanism 35. A switching valve suitable for switching between the "filtration function" and the "backwash function" can be realized.

In addition, the three-way valve 21 and the two-way valves 25a, 25
Since the link mechanism 38 is used as the interlocking mechanism 35 for coordinating the movement of b and the link mechanism 38 is operated by the longitudinal portion 36b which is a single lever member, the valve operation is simple.

Further, since the link mechanism 38 is of a bending type in which the arm 36 serving as an arm member and the arm 37 serving as a lever member are combined, the occupied area is small, and the main part of the five-way switching valve 10 is small. It does not impair the conversion. In addition, a highly reliable switching operation can be ensured.

FIGS. 6A and 6B show a second embodiment of the present invention. In the present embodiment, as the interlocking mechanism 35, instead of the link mechanism 38, a gear mechanism 4 combining various gears is used.
An example in which 0 is adopted is shown.

Specifically, the interlocking mechanism 35 includes the three-way valve 2
For example, a large-diameter spur gear 41 having a lever member 41a is assembled to one stem 23b, and the two-way valves 25a, 25b
A structure in which, for example, a small-diameter fan-shaped gear 42 that meshes with the spur gear 41 is assembled to the stem 27b of the lever member 41b, and by rotating the lever member 41a in the left-right direction (rotation on one side / other side), As in the first embodiment, the three-way valve 21 and the two-way valves 25a and 25b can be operated.

With such an interlocking mechanism 35, the same effect as in the first embodiment can be obtained. However, FIG.
In (b), the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

Although the present invention is applied to the five-way switching valve for switching between the "filtration function" and the "backwashing function", the invention is not limited to this, and the five-way switching valve used for switching the flow path for other uses can be used. May be applied to valves.

[0058]

As described above, according to the first aspect of the present invention, a simple structure for mounting a three-way valve or a two-way valve on a water passage having a simple shape, and furthermore, the rotation of a single operation handle. With the structure in which the three-way valve and each two-way valve are simultaneously switched by the operation, it is possible to provide a five-way switching valve that is simple in valve operation, is excellent in miniaturization and weight reduction, and further provides high productivity.

According to the invention described in claim 2, according to claim 1
In addition to the effects described above, a switching valve suitable for switching between the “filtration function” and the “backwash function” of the filter can be provided. According to the third aspect of the present invention, in addition to the effects of the first and second aspects, there is an effect that a highly reliable switching operation can be performed with a simpler structure having a small occupied area. Play.

[Brief description of the drawings]

FIG. 1 is a view for explaining a structure of a five-way switching valve according to a first embodiment of the present invention.

FIG. 2 is a side sectional view taken along line A-A in FIG. 1 (c).

FIG. 3 is a diagram showing a state in which a filtration system to which the five-way switching valve is applied is switched to a flow suitable for filtration.

FIG. 4 shows a filtration system using a five-way switching valve.
The figure shown with the state at the time of switching to the flow suitable for backwashing.

FIG. 5A is a view for explaining a flow path formed when a five-way switching valve is switched to a flow suitable for filtration.
(B) is a figure for explaining a channel formed when the flow is switched to a flow suitable for backwashing.

FIG. 6 is a view for explaining the structure of a five-way switching valve according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Five-way switching valve 11 ... Valve box 13 ... Water passage 14 ... Intake port (1st connection port) 16a, 16b ... Filter connection port (a pair of 2nd connection port) 18, 19 ... Water outlet, drainage Port (a pair of third connection ports) 20: Valve mechanism 21: Three-way valve 25a, 25b: Two-way valve 30: Operating part 31: Operating handle 35: Interlocking mechanism 36: T-shaped arm (arm member) 36b: Longitudinal Part (lever member) 37 ... I-shaped arm (lever member) 38 ... Link mechanism.

Claims (3)

[Claims] 1. A valve box in which a water passage extending in the axial direction is formed, and a first connection port is formed in the center of the water passage in the axial direction, and a pair of opposite sides sandwiching the first connection port are provided. A second connection port is formed, five external connection ports arranged in series along the water passage in which a pair of third connection ports are formed at both ends of the water passage, and at an axial center of the water passage. Has a three-way valve for selectively switching between the first connection port and water passage portions on both sides of the connection port, and a water passage portion between the second connection port and the third connection port. A valve mechanism configured to have a two-way valve for opening and closing the water passage portion, a three-way valve having a single operation handle, and interlocking with the rotation of the operation handle. An interlocking mechanism for simultaneously switching the two-way valve. An operation unit for switching each part of the water channel to a predetermined flow direction. 2. The first connection port is a water intake port for taking in raw water; the pair of second connection ports is a filter connection port connected to an inlet / outlet of a filter; Are a water outlet for discharging the treated water after the filtration process and a water outlet for discharging the water after the backwashing, and the interlocking mechanism rotates the operation handle to one side. And a communication between the water inlet and a second connection port connected to an outlet of the filter, and a communication between the water intake port and a second connection port connected to an inlet of the filter. When the operation handle is rotated to the other side, the communication between the water intake port and the second connection port connected to the outlet of the filter is established, and the drain port is connected to the inlet of the filter. 2. The communication device according to claim 1, wherein the communication port is configured to communicate with the second connection port. 5. The five-way switching valve according to 1. 3. The arm member, wherein the interlocking mechanism is disposed outside the valve box, a central portion is fixed to a stem of the three-way valve, and both end portions are formed to extend to the respective two-way valves. A link mechanism having a lever member disposed outside the valve box and having one end fixed to the stem of each of the two-way valves and the other end pivotally supported at each end of the arm member so as to be displaceable in the arm direction. The five-way switching valve according to claim 1 or 2, wherein the operation handle is formed of a single lever member formed in a part of the link mechanism.