JP2003269630A - Six-way switching valve and filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a six-way switching valve which smoothly switches among water cleaning operation, backward washing operation and washing operation with one valve unit. <P>SOLUTION: The six-way switching valve is provided with a valve casing 21, a first to a sixth external connection port 51 to 56, a first to a fifth flow passage 81 to 86, a first to third rotary type valve elements 29, 33, 47 and electric motors 77, 79 switching a first to a third valve element 29, 33, 47 to the predetermined modes, and has compact switching functions. The six-way switching valve is mounted to the filter at a raw water supply port and a processing water outlet and the smooth switching among the normal water cleaning operation, backward washing operation by raw water and washing operation is made with the only one valve unit by switching each valve element 29, 33, 47 according to the switching modes having the raw water flow in from the first external connection port. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a six-way switching valve used by connecting to a filter, for example, and a filtering device having the six-way switching valve.

[0002]

2. Description of the Related Art In general, impurities such as iron dissolved in well water are removed by injecting a sodium hypochlorite solution into the well water to oxidize the iron contained in the well water. ) Is filtered with a filter to separate and remove iron contained in well water.

[0003] In a domestic iron removal filter, a particulate filter material is housed in a cylindrical container having a vertical shape, and well water (raw water) is supplied from the upper surface of the filter material layer to obtain a filter material. Well water is passing through the layer. Then, while the well water passes through the filter material, the contained iron content is filtered and separated and removed.

[0004]

By the way, the filter material of the filter is clogged as the purified water progresses.

Therefore, as a countermeasure against this, conventionally, a structure for storing purified water is adopted, and when the filter material is clogged, the accumulated treated water is caused to flow into the filter,
A backwash operation was performed to wash away iron etc. from the filter material.

However, in such a structure for performing the backwashing operation, it is necessary to provide a valve device at the raw water inlet or treated water outlet of the filter to form a switching system, and it is costly to use many valve devices. Burden is imposed.

Moreover, after finishing the backwashing operation, a part of the pipe is contaminated with dirty backwashing water or touching the dirty backwashing water. ,
A drain valve was separately provided on the water supply side, and immediately after restarting the water purification operation, the drain valve was operated to drain dirty water (cleaning). Therefore, until the purified water can be used, the operation of many valve devices at distant points is forced, so that there is a problem that the purified water operation, the backwash operation, and the cleaning operation cannot be smoothly switched.

Therefore, the present invention provides a six-way switching valve and a filtering device which enable a smooth switching operation between a water purification operation, a backwash operation using raw water, and a cleaning operation using a water purification operation with a single valve device. To do.

[0009]

In order to achieve the above object, the invention according to claims 1 and 4 provides a valve box, a first to a sixth external connection ports, and a first to a fifth aspect. By adopting a six-way switching valve having a compact switching function, the flow path, the first to third valve bodies, and a switching means for switching the first to third valve bodies to a predetermined mode are provided. Two
The external connection port of is set to the raw water supply port of the filter, the fourth external connection port is set to the treated water outlet of the filter, and the raw water is introduced from the first external connection port. Therefore, by switching each valve element, only one valve device
It is possible to smoothly switch between normal water purification operation, backwash operation using raw water, and cleaning operation using water purification operation.

Especially in the backwashing operation, since the same raw water as in the purified water operation is used instead of the backwashing with the treated water, a facility for storing the treated water is unnecessary, and the washing operation is partially changed by switching during the purified water operation. Since it is only done, the cost is cheaper than the case where the treated water is used for backwashing operation.

According to the second aspect of the present invention, all the first to third valve bodies are valve valves so that the flow passage can be switched with a light operating force while ensuring the sealing performance during the water purification operation or during the stoppage. The first valve body and the third valve body, which are rotatably fitted in the chamber in a non-contact state, have a spherical stopper valve that moves on the inner surface of the valve chamber to follow the valve body. The valve chamber that accommodates the first valve body has a structure in which an opening that is closed by the stopper valve when the first valve body is positioned at the first switching position is used. By using the structure in which the opening that is closed by the stopper valve when the third valve body is positioned at the fifth switching position is formed, the sliding resistance due to the rotation of the valve body is suppressed and the inner and outer seals of the valve box are required. The positive pressure applied to the stopper valve is used to ensure a reliable seal at the required location.

According to a third aspect of the present invention, the first valve body and the second valve body, which are in a predetermined phase, are coaxially connected to each other by a shaft member so that each mode can be automatically switched. In addition, a switching structure using a first electric motor that rotates the connected valve body and a second electric motor that rotates the third valve body is adopted.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described based on a first embodiment shown in FIGS.

1 to 3 show a filter device for a well used in, for example, ordinary households, and 1 in the figure is a filter constituting the filter device, for example, a filter for removing iron.

The filter 1 is composed of, for example, a vertical cylindrical tank. The cylindrical tank has a cylindrical body 3a whose lower part is closed and whose upper end is open, and this body 3a.
And an end plate 3b formed in a dish shape or a spherical shape that closes the upper end of the. The upper end of the body portion 3a and the open end of the end plate 3b are removably fastened to each other using an annular flange 4 attached to the outer peripheral portion of each open end. In addition, 5 is a gasket member sandwiched between the flanges 4 and 4, 6 is a bolt for fastening the flanges together, and 7 is a leg for vertically installing the entire tank.

In the body portion 3a, a particulate filter material 9 is provided between a point near the opening and a collecting chamber 8 formed at the bottom.
(For example, filter sand) is stored. In addition, collection room 8
A filter 10 having an upper surface closed is embedded immediately above the filter 10 to form a two-stage filtration structure with a filter material 9 and a filter 10.

An inflow chamber 11 is formed between the end plate 3b and the upper surface of the filter material layer facing the end plate 3b. An inflow pipe 12 is housed in the inflow chamber 11. The inflow pipe 12 is a pedestal 1 installed on the peripheral wall on the opening side of the body 3a.
The horizontal pipe 14a extends from 3 to the center of the body 3a, and the vertical pipe 14b rises from the end of the horizontal pipe 14a to near the center of the inner surface of the end plate 3b. And horizontal piping 1
An end of 4a is connected to an inflow port 15 (corresponding to a raw water supply port) formed in the pedestal 13. The end of the vertical pipe 14b faces the inner surface of the end plate 3b and forms the outlet 16.

Further, the pedestal 13 is formed with an outlet 17 (corresponding to a treated water outlet) on the lower side in parallel with the inlet 15.
The outflow port 17 has an outflow pipe 18 that goes into the body portion 3a.
Is connected. The outflow pipe 18 extends downward through the filter medium 9, and its tip is connected to the collection chamber 8 through the filter 10.

The pedestal 13 of the filter 1 is provided with a hexagonal switching valve 20.
Is installed so that water purification operation, backwash operation, and cleaning operation can be switched.

FIG. 4 shows the schematic structure of the six-way switching valve 20, FIG. 5 shows the overall appearance of the six-way switching valve 20, FIG. 6 shows the same internal structure, and FIG. Similarly, a front view and a side view are shown, and FIG. 8 shows a sectional view.

The structure of the six-way switching valve 20 will be described. Reference numeral 21 in the drawing denotes a cast valve box. Valve box 21
Is composed of three valve box parts 21a to 21c.
Of these, the valve box part 21a is a part that is assembled to the inflow port 15,
The valve box portion 21b is a portion that is assembled to the outlet 17, and the valve box portion 21b
Reference character c is a portion that is assembled to the valve box portion 21b.

As shown in FIGS. 5 to 8, the valve box portion 21a has a bottomed cylindrical shape with a bottom formed in the upper portion and an opening formed in the lower portion.

The valve box portion 21b has a ring-shaped groove 2 on the upper side.
5 is formed, and has a body portion 26 in which a bottomed cylindrical space that opens downward is formed. Body 26
A partition plate 27 is screwed to the upper part of the so as to close the opening of the groove 25. A lid 28 is screwed to the lower portion of the main body 26 so as to close a cylindrical space having a bottom, and a cylindrical valve chamber 29 is formed inside. The upper part of the valve box part 21b and the lower part of the valve box part 21a are concentrically fastened in series by flange coupling so that the partition plate 27 closes the opening of the valve box part 21a. A cylindrical valve chamber 30 is formed inside.

A valve shaft 31 (corresponding to a shaft member) extending in the axial direction is housed in the center of the valve chamber 30.
The upper end portion of the valve shaft 31 is rotatably fitted in the boss portion 32 protruding from the upper portion of the valve box portion 21a, and the lower end portion thereof is
It penetrates through the partition plate 27 and is rotatably fitted in a boss portion 25 a formed by a peripheral wall on the inner peripheral side of the groove portion 25. The valve shaft 31 includes a valve body 33 (first
Equivalent to the valve body). As the valve element 33, a block that is housed in a part of the valve chamber 30, for example, a substantially fan-shaped block having a narrow central side and a wide outer peripheral side is used. The valve element 33 is finished in a shape that fits a gap with the valve chamber 30, that is, a shape in which a slight gap is secured between the inner surface (outer peripheral surface, upper and lower surfaces) of the valve chamber 30. The structure is such that the inside of the valve chamber 30 can be rotated while keeping non-contact with the wall surface of the valve chamber 30 with 31 as a fulcrum. Further, on the lower surface of the valve body 33,
A cylindrical hole 34 extending in the axial direction is formed. A stopper valve, for example, a spherical valve body 35 formed of a spherical member is movably accommodated in the hole 34. The spherical valve body 35 is a coil-shaped spring member 3 housed in a hole 34.
4a has a structure in which it is biased toward the opening side, that is, the partition plate 27 side, and follows the movement of the valve element 33,
It can be moved (displaced) along the lower surface of the.

A valve shaft 37 (corresponding to a shaft member) extending in the axial direction is housed in the center of the valve chamber 29.
An upper end portion of the valve shaft 37 is rotatably fitted in a boss portion 25a at an upper portion of the valve box portion 21b, and a lower end portion is rotatably fitted in a boss portion 28a formed on the lid body 28. In the boss portion 25a, the upper end portion of the valve shaft 37 and the lower end portion of the valve shaft 31 are coaxial with each other by a fitting portion 38 formed by a joint portion, for example, a concave groove and a protruding piece portion fitted therein. It is combined. Like the valve body 33, the valve shaft 37 has a substantially fan-shaped rubber-made valve body 39 (corresponding to a second valve body).
Is attached. This valve body 39 is also similar to the valve body 33 in the valve chamber 2
9 and a shape that fits a clearance, that is, a shape that allows a slight clearance to be secured between the inner surface (outer peripheral surface, upper and lower surfaces) of the valve chamber 29. That is, the valve body 39 also has a structure in which the inside of the valve chamber 29 can be rotated while keeping the valve shaft 37 as a fulcrum and not in contact with the wall surface of the valve chamber 29. The valve body 39 has no stopper valve.

The valve box portion 21c has a bottomed cylindrical main body portion 40 having a bottom formed in the upper portion and an opening formed in the lower portion. A lid 41 is screwed to the lower end of the main body 40 so as to close the cylindrical space with a bottom, and a cylindrical valve chamber 43 is formed inside. The side portion of the valve box portion 21c and the side portion of the valve box 21b are connected to each other by connecting the mouth body portions 44 formed on each side portion, specifically, by flange coupling between the end portions of the mouth body portion 44. It is fastened so as to be connected in parallel.
The inner cavity of each mouth portion 44 is open to the peripheral wall surface of the valve chamber 30 and the peripheral wall surface of the valve chamber 43, and allows the adjacent valve chambers 30 and 43 to communicate with each other.

A valve shaft 45 extending in the axial direction is housed in the center of the valve chamber 43. An upper end portion of the valve shaft 45 is rotatably fitted in a boss portion 46 protruding from an upper portion of the valve box portion 21c, and a lower end portion thereof is a boss portion 41a formed in the lid 41 (illustrated in FIG. 7A). ) Rotatably fit inside. The valve shaft 37 is provided with a rubber member valve body 47 (corresponding to a third valve body) having a substantially fan-like shape similar to the valve body 33. Like the valve element 33, the valve element 47 also has a valve chamber 29.
And a shape that fits a gap, that is, a shape in which a slight gap is secured between the inner surface (outer peripheral surface, upper and lower surfaces) of the valve chamber 43, and the wall surface of the valve chamber 29 with the valve shaft 45 as a fulcrum. The structure is such that the inside of the valve chamber 43 can be rotated while maintaining non-contact. On the lower surface of the valve body 47, similarly to the valve body 33, a stopper valve structure, specifically, a cylindrical hole 48 and a spherical valve body 49 (stopper valve) movably accommodated in the hole 48, A coil-shaped spring member 50 for urging the spherical valve body 35 is built in.

As shown in FIGS. 5 and 6, six external connection ports 51 to 56 are formed on the outer surfaces of the respective valve box parts 21a to 21c. The external connection port 51 is for inflowing raw water, and the connection port 51 has a cylindrical connection from a side portion of the valve box portion 21a, specifically, a side portion substantially orthogonal to the column direction of the valve box portions 21a to 21c. A structure in which the mouth 60 is projected is used. The tip of the connection port body 60 is a screw hole into which a raw water inflow side device (a pipe member connected to the raw water inflow device or the like) is attached. Further, the base end portion is open to the peripheral wall surface of the valve chamber 30 so that raw water can be guided from the tip of the connection port body 60 into the valve chamber 30.

The external connection port 52 is used for connecting the inlet port of the filter 1, and the connection port 52 has a cylindrical connection port from the side of the valve box portion 21a opposite to the connection port body 60. A structure in which the body 61 is projected is used. Then, at the tip of this connection port body 61, the inflow port 15 of the pedestal 13 and the flange part 62 for mounting are attached.
Is formed, and the base end portion opens to the peripheral wall surface of the valve chamber 30. That is, the connection port body 61 communicates with the connection port body 60 through the valve chamber 30. Thereby, as shown in FIG. 4, a flow path 81 connecting the external connection port 51 and the external connection port 52.
(Corresponding to the first flow path) is formed.

The external connection port 53 is for drainage, and the connection port 5
For 3, a structure is used in which a tubular connection port body 63 is projected from a side portion of the side portion of the valve box portion 21b forming the outer wall of the groove portion 25. The tip of the connection port body 64 is a screw hole into which the drainage pipe 64 (only shown in FIGS. 1 and 2) is attached. Further, the base end portion communicates with the groove space, and further communicates with a valve hole 66 formed in a plate surface portion of the partition plate 27 forming a locus through which the spherical valve body 35 of the valve body 33 passes. That is,
The connection port body 63 communicates with the valve chamber 30. Due to the communication with the lower surface of the valve chamber 30, as shown in FIG.
And a flow path 83 connecting the middle of the flow path 81 (corresponding to a third flow path)
Is formed.

The external connection port 54 is for connecting the outlet port of the filter 1. The connection port 54 is provided with a cylindrical connection port body 68 from the side portion forming the peripheral wall of the valve chamber 29 of the valve box portion 21b. A protruding structure is used. The connection port body 68 projects in the same direction as the previous connection port body 61 for connecting the inflow port. Further, a flange portion 69 that is assembled with the outlet 17 of the pedestal 13 is formed at the tip of the connection port body 68. Further, the base end portion of the connection port body 68 is open to the peripheral wall surface of the valve chamber 29.

The external connection port 55 is for the outflow of treated water, and the connection port 55 has a structure in which a cylindrical connection port body 70 is projected from the side portion of the valve box portion 21c. Then, a connection portion to which equipment on the water supply side (water supply pipe or the like) is attached, for example, a screw joint 71 (shown in FIGS. 7 and 8) is attached to the tip of the connection port body 70. The base end portion is open to the peripheral wall surface of the valve chamber 43. Thereby, as shown in FIG. 4, a flow path 82 (corresponding to a second flow path) connecting the external connection port 55 and the external connection port 54 is formed through the valve chamber 29 and the valve chamber 43.

On the other hand, the connection port body 60 for inflowing raw water is formed with a branch port body 60a which is divided into a valve box portion 21b from the middle thereof as shown in FIGS. 4, 5 and 7.
The tip portion of the branch port body 60a is attached to the side portion of the valve box portion 21b in the same direction as the connection port body 60. Then, the tip is opened to the peripheral wall surface of the valve chamber 30. As a result, the passage 7 for guiding the raw water to the valve chamber 30 as shown in FIG.
Forming 2. As shown in FIG. 4, the passage 72 forms a flow passage 84 that connects the external connection port 51 and the upstream side portion of the flow passage 82.

The external connection port 56 is for drainage, and the connection port 5
6 has a structure in which a tubular connection port body 73 is projected from a lid body 41 which is a lower portion of the valve chamber 43. The tip of the connection port 73 is a screw hole to which the drainage pipe 64 is attached. Further, the base end portion communicates with a valve hole 75 formed in a plate surface portion forming a locus through which the spherical valve body 49 of the valve body 47 passes.
With this communication structure, as shown in FIG. 4, a flow path 85 connecting the external connection port 56 and the downstream side portion of the flow path 82 is formed.

On the other hand, the valve body 33 in the flow passage portion where the flow passage 81 and the flow passage 83 intersect with each other is associated with each opening position that opens in the valve chamber 30, and as shown in FIG. A switching position A for communicating the flow passage 81 and blocking the flow passage 83 in the posture, and the flow passage 83 and the external connection port 52 in the vertical posture in which, for example, 90 ° phase is established as shown in FIG. 4B. And a switching position B for connecting the flow path 82 and blocking the flow path 82 are set. That is, when the valve element 33 is rotated to each switching position, the flow passage 81 and the flow passage 83 are switched. Further, the valve hole 6 forming the inlet of the flow path 83
6 has a structure in which when the valve body 33 reaches the switching position A, the spherical valve body 35 built in the valve body 33 closes the valve body 33.
The pressure of the fluid applied to 5 is used to prevent the fluid from leaking to the outside.

As shown in FIG. 4A, the valve body 39 in the flow path portion where the flow path 82 and the flow path 84 intersect is associated with each opening position in the valve chamber 29, for example, in a vertical posture. At this time, the switching position C for connecting the flow path 82 and blocking the flow path 84, for example, as shown in FIG.
When in the horizontal orientation with 0 ° phase, the flow path 84 and the external connection port 5
A switching position D is set so as to communicate with No. 4 and block the flow path 84. That is, when the valve element 39 is rotated to each switching position, the switching between the flow passage 82 and the flow passage 84 is performed.

The valve body 47 in the flow passage portion where the flow passage 82 and the flow passage 85 intersect is associated with each opening position that opens in the valve chamber 43, and is in the vertical posture as shown in FIG. 4A. , A switching position E that allows the flow path 82 to flow while blocking the flow path 85, for example, 9 as shown in FIGS. 4 (b) and 4 (c).
A switching position F is set so that the flow path 82 and the flow path 85 are communicated with each other and the flow path 82 is blocked in the horizontal posture in which the phase is 0 °. That is, when the valve body 47 is rotated to each switching position, the flow path 82 and the flow path 85 are switched. Further, the valve hole 75 that forms the inlet of the flow path 85 is
When 7 reaches the switching position E, the spherical valve body 4 built in the valve body 47
The structure is closed by 9, and the pressure of the fluid applied to the spherical valve body 49 is used to prevent the fluid from leaking to the outside.

At the end of the boss portion 32 of the valve box portion 21a, an electric motor 77 is installed as shown in FIG. Reference numeral 32a denotes a motor mounting flange portion formed at the end of the boss portion 32. And the electric motor 7
The output shaft 7 is connected to the upper end portion of the valve shaft 32 in the boss portion 31 via a joint portion, for example, the concave-convex fitting portion 32a, and makes the two valve bodies 33, 39 in phase cooperate with each other. While being able to rotate.

An electric motor 79 is installed at the end of the boss portion 46 of the valve box portion 21c. Reference numeral 46a denotes a motor mounting flange formed at the end of the boss 46. The output shaft of the electric motor 79 is connected to the boss portion 4
It is connected to the upper end portion of the valve shaft 45 in 6 via a joint portion, for example, a concave-convex fitting portion 45a, so that the valve body 47 can be rotated.

The external connection port 52 of the six-way switching valve 20 matches the inflow port 15 of the filter 1, and the outflow port 1 of the filter 1
7 so that the external connection port 54 is aligned with the flange portion 6
2, 69 are attached to the pedestal 13 of the filter 1.

By switching the six-way switching valve 20 by rotating the electric motors 77 and 79, it is possible to switch between the purified water operation mode, the backwash operation mode using raw water, and the cleaning operation mode utilizing the purified water operation. (Switching means). Specifically, in the water purification operation mode (first switching mode), as shown in FIG. 4A, the valve element 33 is in the switching position A, the valve element 39 is in the switching position C, and the valve element 47 is in the switching position E. In the backwash operation mode (second switching mode), the valve element 33 is switched to the switching position B, the valve element 39 is switched to the switching position D and the valve element 47, as shown in FIG. 4B. Is formed by switching to the switching position F, and the cleaning operation mode (third switching mode) is the valve body 3 as shown in FIG.
3 is a switching position A, the valve element 39 is a switching position C, and the valve element 47 is a switching position F.

The filter 1 has electric motors 77, 79.
The control unit 86 for automatically switching each mode from the control of 1. is installed, and when the water purification operation is normally performed and the filter material 9 is clogged more than a predetermined amount, it is switched to the backwash operation for a predetermined time. After the lapse of time, when the backwashing operation is completed, the washing operation is started, and when the washing operation elapses for a predetermined time, switching control for returning to the water purification operation is performed.

That is, when water is purified by the filter 1, the water supply pump (not shown) is operated to turn the raw water into the external connection port 51 of the six-way switching valve 20 as shown in FIG. Supply well water.

Here, the six-way switching valve 20 is driven by valves by the electric motors 77, 79 in accordance with an instruction from the control unit 86, and as shown in FIG.
7 is switched to the clean water operation mode A. That is, the valve element 33 is rotated to the switching position A, and the valve element 39 is moved to the switching position C.
The valve body 47 is rotated to the switching position E. At this time, the valve holes 66 and 75 on the drainage side are closed by the spherical valve bodies 35 and 49, and further, the spherical valve bodies 35 and 49 are further provided.
Spherical valve bodies 35, 4 due to pressure (positive pressure) applied from above
Since 9 is pressed against the opening edges of the valve holes 66 and 67, high sealing performance is ensured.

Then, the well water flows through the flow passage 81 and the valve chamber 3.
0 from the external connection port 52 through the inlet pipe 1 of the filter 1
Introduced in 2. Then, the well water flows out from the outlet 16 of the inflow pipe 12.

As a result, the well water flows into the upper surface of the filter material layer as shown in FIG. 1 (a). The inflowing well water permeates each part of the filter medium 9 and further the filter 1
During the passage of 0, the contained iron is filtered (removal of iron). The treated water that has been filtered is returned to the external connection port 54 of the six-way switching valve 20 via the collection chamber 8 and the outflow pipe 18. Then, this treated water flows into the flow path 82 and the valve chambers 29 and 4.
3 through the outside of the hexagonal switching valve, that is, from the external connection port 55 to the water supply pipe (not shown) of the water supply facility (water supply side).

It is assumed that the water purification operation is continued and the filter medium 9 is clogged.

Then, the controller 86 switches the water purification operation mode to the backwash operation mode. As a result, the valve elements 33, 39, 47 are rotated by the valve drive of the electric motors 77, 79 to the point 90 ° in phase as shown in FIG. 4B. Specifically, the valve element 33 is switched to the switching position B, the valve element 39 is switched to the switching position D, and the valve element 47 is switched to the switching position F.

Then, as shown in FIGS. 2 and 4 (b), the well water (raw water) flowing in from the external connection port 51 is
Without going to the external connection port 2, it is led out from the external connection port 54 to the outflow pipe 18 through the flow path 84, the valve chamber 29, and the upstream side portion of the flow path 82.

As a result, the well water is guided to the collecting chamber 8 at the bottom of the filter 1 and flows from the filter 10 into the excess material layer. When this well water passes through the filter medium layer, the filter medium 9 is stirred to wash away impurities such as iron adhering to the filter medium 9.

The well water that has become dirty water due to the impurities flows into the inflow pipe 12 from the outlet 16 and is returned from the inflow port 15 to the external connection port 52. Then, this sewage becomes the flow path 8
1. Pass through the valve chamber 30 and the passage 83 from the valve hole 66,
It is discharged from the external connection port 53 to the drainage pipe 64. Thereby, the backwash operation using raw water is performed.

If it is assumed that the clogging of the filter 1 has been eliminated after a lapse of a predetermined time, then the control section 86 instructs to switch to the cleaning operation mode. Then, Fig. 4
As shown in (c), the switching position of the valve element 47 does not change, and only the valve elements 33 and 39 return to the same 90 ° phase-shifted point by the drive of the electric motor 77. Specifically, the valve element 33 is switched to the switching position A, and the valve element 39 is switched to the switching position C.

As a result, the well water (raw water) supplied to the external connection port 51 as shown in FIGS. 3 and 4 (c).
Is discharged from the external connection port 52 through the flow path 81 and the valve chamber 30 through the inflow port 15 and the inflow pipe 12 to the upper surface of the filter material layer. As a result, the well water, which is the raw water, passes through the filter medium 9 while washing away impurities adhering to the inner surface of the flow path, the inner surface of the valve chamber, the surface of the valve body, and the like during backwashing. This well water is returned to the external connection port 54 of the hexagonal switching valve 20 through the collection chamber 8 and the outflow pipe 18, and the impurities adhering to the inner surface of the outflow pipe 18 at the time of back washing are washed away. Subsequently, the well water flows through the flow path 82 to the flow path 85 through the valve hole 75,
Impurities attached to the upstream portion of the flow path 82, the inner surface of the valve chamber, the surface of the valve body, etc. are washed away during the reverse cleaning. The well water containing this dirt is discharged from the external connection port 56 to the drainage pipe 64.
By this cleaning operation, the sewage produced after the back cleaning is not sent to the water supply side.

When this cleaning operation continues for a predetermined time, the controller 8
6 determines that the dirt due to the backwashing has been eliminated, and the electric motor 79 rotates the valve body 47 to the switching position E.
And it returns to the water purification operation mode shown by Fig.4 (a). As a result, the clean water operation is restarted and the purified well water is supplied to the water supply facility.

As described above, the six-way switching valve 20 has the valve box 21.
External connection ports 51-56, flow paths 81-86, valve body 3
3, 39, 47, the valve body 33, 39, 47 by providing a switching structure for switching to a predetermined mode, the function of switching between normal water purification operation, backwash operation with raw water, cleaning operation using water purification operation is compact Therefore, it is possible to smoothly switch each operation with one compact valve device. Moreover, since only one valve device is required, the cost burden is small. In addition, the filtering device can easily ensure the switching function only by combining the filter 1 with the hexagonal switching valve 20. In particular, the backwash operation of the filtration device uses the same raw water as in the clean water operation, not the backwash with treated water.
No equipment is required to store the treated water, and because the cleaning operation only partially changes the switching during the clean water operation, the cost is lower than when using the treated water for backwash operation.

Further, the valve bodies 33, 39, 47 have a valve structure in which the valve bodies 33, 39, 47 are rotationally displaced while not in contact with the wall surface of the valve chamber. Among them, the valve bodies 33, 47 including switching of external drainage have a spherical valve body 35. , 49 is built in, and the valve holes 66, 75 at the switching position of the external drainage are closed by the spherical valve bodies 35, 49. Therefore, the hexagonal switching valve 20 has each valve body 33, 39, 47.
The sliding resistance associated with the rotation of the valve box is small, and the valve holes 66 and 67 at the locations where the inner and outer seals of the valve box 21 are required are
The positive pressure applied to the spherical valve bodies 35, 49 is utilized to ensure a reliable seal. That is, it is possible to realize the six-way switching valve 20 for a filter that can switch the flow paths with a light operating force while ensuring the sealing performance during the clean water operation and during stoppage, and that achieves both reliability and operability.

Further, by utilizing this advantage, in the switching structure of the hexagonal switching valve 20, the valve bodies 33 and 39 are connected to each other by the valve shaft 3.
Since a structure in which the valve shafts 31 and 37 are connected coaxially by 1 and 37 and the valve shafts 31 and 37 are driven by the electric motor 77 and a structure in which the valve body 47 is driven by the electric motor 79 are used, the cost is small and the motor is small in size. Using, you can automatically switch each mode.

FIG. 9 shows a second embodiment of the present invention.

This embodiment is a modification of the first embodiment, and instead of the electric motors 77 and 79, each handle member 9 is used.
By attaching 0 and 91, it is possible to manually switch between the water purification operation mode, the backwash operation mode, and the washing operation mode. Of course, each valve element 33, 39, 4
Since a valve body structure capable of rotating while maintaining a non-contact state is used for 7, a smooth operation can be performed with a small force. However, in FIG. 9, the first described above
The same parts as those of the embodiment are denoted by the same reference numerals and the description thereof is omitted.

The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the hexagonal switching valve is applied to the switching of the flow path of the filtering device, but the present invention is not limited to this and may be used when switching other flow paths. Of course, you may apply to filters other than an iron removal filter. Also, the shape and structure of each part of the hexagonal switching valve are not specified in each embodiment. of course,
The combination of the three valve bodies is not limited to the combined use of the two-story structure and the one-story structure, but may be another structure.

[0061]

As described above, the first and fourth aspects are provided.
According to the present invention, one valve device can smoothly switch three operations such as a normal water purification operation, a backwash operation with raw water, and a cleaning operation using the water purification operation. In particular, the backwash operation is not a backwash with treated water, but an operation that uses the same raw water as in the purified water operation, so there is no need for equipment to store the treated water, and the washing operation is the same as in the purified water operation. Since only part of the path switching is changed, the cost is cheaper than the flow path switching structure when using the treated water for backwashing operation.

According to the second aspect of the present invention, the flow passage can be switched with a light operating force while securing the sealing property during the water purification operation and during the stoppage.

According to the third aspect of the present invention, the water purification operation mode, the backwash operation mode of raw water, and the water purification operation mode can be automatically switched.

[Brief description of drawings]

FIG. 1A is a cross-sectional view showing a filtering device with a six-way switching valve according to a first embodiment of the present invention together with a flow of water during a water purification operation in the filtering device. (B) is a side view of the filtration device with the same six-way switching valve.

FIG. 2 is a cross-sectional view showing the flow of water during the backwash operation in the filtration device.

FIG. 3 is a cross-sectional view showing the flow of water during a washing operation in the filtration device.

FIG. 4A is a cross-sectional view schematically showing the flow of water in the water purification operation of the hexagonal switching valve. FIG. 6B is a sectional view schematically showing the flow of water during the backwashing operation. FIG. 6C is a sectional view schematically showing the flow of water during the washing operation.

FIG. 5 is a perspective view showing the external appearance of the entire six-way switching valve.

FIG. 6 is a perspective view showing a flow passage switching structure inside the hexagonal switching valve.

FIG. 7A is a front view of a six-way switching valve. (B) is a side view of the same six-way switching valve.

FIG. 8 is a side sectional view of the same six-way switching valve.

FIG. 9 is a cross-sectional view showing a six-way switching valve according to a second embodiment of the present invention.

[Explanation of symbols]

1 ... Filter 15 ... Inlet (raw water supply port) 17 Outlet (treated water outlet) 20 ... Hexagonal switching valve 21 ... Valve box 29, 30, 43 ... Valve chamber 33, 39, 47 ... Valve body 35, 49 ... Spherical valve body (stopper valve) 51-56 ... External connection port 66, 75 ... Valve hole (opening) 77, 79 ... Electric motor 81-86 ... flow path 90, 91 ... Handle member.

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3H067 AA12 AA33 BB02 BB08 BB14                       CC32 CC44 CC46 DD03 DD13                       DD32 EA14 EC04 FF17 GG13                       GG29

Claims (4)

[Claims] 1. A valve box having first to sixth external connection ports, and a fluid is supplied to the first external connection ports; and a first external connection port formed in the valve box. The second
A first flow path that connects the external connection port of the fourth external connection port and the fourth external connection port formed in the valve box.
The fluid connecting to the external connection port of the
A second flow path flowing toward the external connection port of the first valve, the second external flow path formed in the valve box, and the third external connection port of the first channel.
A third flow path connecting to the middle of the flow path of the first flow path, the third external flow path formed in the valve box, and the first external connection port and the second flow path.
A fourth flow path connecting the upstream side portion of the flow path of the second flow path, and the sixth external connection port and the second flow path formed in the valve box.
A fifth flow path that connects the downstream side portion of the flow path and a flow path portion where the first flow path and the third flow path intersect, and that connects the first flow path to each other. A rotatable first type switchable between a first switching position and a second switching position for communicating the third flow path with the second external connection port.
And a third switching position which is arranged in a flow passage portion where the second flow passage and the fourth flow passage intersect with each other, and which connects the second flow passage, and the fourth flow passage. And a rotation-type second switchable over a fourth switching position for communicating the above-mentioned fourth external connection port with each other.
A valve body, a fifth switching position which is arranged in a flow passage portion where the second flow passage and the fifth flow passage intersect, and which allows the second flow passage to communicate with each other, and the second flow passage. And a sixth switching position that allows the fifth flow path to communicate with each other, a rotatable third valve body, the first to third valve bodies, and the first valve. The body is in a first switching position, the second valve body is in a third switching position, the third is
In the first switching mode in which the valve body is in the fifth switching position, the first valve body is in the second switching position, the second valve body is in the fourth switching position, and the third valve is A second switching mode in which the body is in a sixth switching position, the first valve body is in a first switching position, the second valve body is in a third switching position, and the third valve body is in a third switching position. 6. A six-way switching valve, comprising switching means for pivotably switching to a third switching mode which is a switching position of 6. 2. The first to third valve bodies are rotatably housed in the valve chamber in a non-contact state, and the first to third of these
The valve body and the third valve body each include a spherical stopper valve that moves on the inner surface of the valve chamber following the valve body, and the valve chamber in which the first valve body is housed has the third stopper valve. Communicating with the flow path, first
Is formed in the valve chamber in which the stopper valve closes when the valve body is positioned at the first switching position, and the valve chamber in which the third valve body is housed communicates with the fifth flow path. 5th valve
The six-way switching valve according to claim 1, wherein an opening that is blocked by the stopper valve when positioned at the switching position is formed. 3. The switching means coaxially connects the first valve body and the second valve body, which are in a predetermined phase, with each other by a shaft member and rotates the connected valve body. A first electric motor and a second electric motor for rotating the third valve body
6. The six-way switching valve according to claim 1 or 2, wherein the six-way switching valve is configured by including the electric motor. 4. A filter having a raw water supply port and a treated water outlet from which treated water after filtering the raw water with a filter medium is discharged, and a raw water supply port and a treated water outlet of this filter. A filter device having a six-way switching valve, wherein the six-way switching valve is a first external connection port to which raw water is supplied, a second external connection port connected to the raw water supply port, and drainage. Third external connection port of
A valve box having a fourth external connection port connected to the treated water outlet and a sixth external connection port for drainage; and the first external connection port and the second external port formed in the valve box.
A first flow path that connects the external connection port of the fourth external connection port and the fourth external connection port formed in the valve box.
A second flow path connecting the external connection port of the first external connection port and the third external connection port formed in the valve box.
A third flow path connecting to the middle of the flow path of the first flow path, the third external flow path formed in the valve box, and the first external connection port and the second flow path.
A fourth flow path connecting the upstream side portion of the flow path of the second flow path, and the sixth external connection port and the second flow path formed in the valve box.
A fifth flow path that connects the downstream side portion of the flow path and a flow path portion where the first flow path and the third flow path intersect, and that connects the first flow path to each other. A rotatable first type switchable between a first switching position and a second switching position for communicating the third flow path with the second external connection port.
And a third switching position which is arranged in a flow passage portion where the second flow passage and the fourth flow passage intersect with each other, and which connects the second flow passage, and the fourth flow passage. And a rotation-type second switchable over a fourth switching position for communicating the above-mentioned fourth external connection port with each other.
And a fifth switching position, which is disposed in a flow passage portion where the second flow passage and the fifth flow passage intersect with each other, for communicating the second flow passage, and the second flow passage. And a sixth switching position that allows the fifth flow path to communicate with each other, a rotatable third valve body, the first to third valve bodies, and the first valve. The body is in a first switching position, the second valve body is in a third switching position, the third is
Of the water purification operation mode in which the valve body is in the fifth switching position, the first valve body is in the second switching position, the second valve body is in the fourth switching position, and the third valve body is in the third switching body. A backwash operation mode that is a sixth switching position, the first valve body is in a first switching position,
It is characterized in that the second valve body is provided with a switching means for pivotably switching to a third switching position and a cleaning operation mode in which the third valve body is in a sixth switching position. Filtration device.