JPH04282083A - Water piping switching device for water purifying system - Google Patents

Abstract

PURPOSE:To improve the operability with the simple structure by forming an upstream side feed passage, a downstream side feed passage, an upstream side water purifying passage, a downstream side water purifying passage and a drain passage in the circumferential direction of a body, and connecting the respective passages by rotation of a valve body to form a water purifying passage, a reverse washing passage and a washing passage selectively. CONSTITUTION:When the valve body 13 of a change-over valve 11 is placed in a filtration rotating position, an upstream side feed passage 120 and a downstream side feed passage 121 are communicated with each other, and an upstream side water purifying passage 122 and a downstream side water purifying passage 123 are communicated with each other, so that water flows in the passages 120 121 122 123 as shown in the drawing to form a water purifying passage A. In the reverse washing rotating position, the upstream side feed passage 120 is communicated with the upstream side water purifying passage 122, and the downstream side feed passage 121 is communicated with a drain passage 124 so as to form a reverse washing passage B. In a washing rotating position, the upstream side feed passage 120 is communicated with the downstream side feed passage 121, and the upstream side water purifying passage 122 is communicated with the drain passage 124, so that water flows in the passages 120 121 122 124 to form a washing passage C.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water pipe switching device for a water purification system that filters water using a filter and sends the water to houses, etc.

0002

2. Description of the Related Art There is a small-sized water purification system that filters water from a well or water tank using a filter and sends the water to a house or the like, and this water purification system may be constructed as shown in FIG. 13, for example. In this water purification system, a five-way valve 100 placed on the supply side and a three-way valve 101 placed on the water supply side are operated to the filtration side to form a filtration flow path A, thereby forming a filtration flow path A.
2, water is supplied from a well or a water tank to a filter 104 via a pipe 103, and the water filtered through the sand 105 and filter 106 of this filter 104 is sent to a house via a pipe 107. The water supply and water supply during normal filtration operation of this water purification system are shown by white arrows.

By the way, because this filtration action causes dirt and mud to clog the sand 105 of the filter 104, the five-way valve 100 and the three-way valve 101 are switched to the backwash side to form a backwash flow path B. By supplying water, dirt and mud adhering to the sand 105 of the filter 104 are washed away and discharged from the drain pipe 108. Furthermore, after this backwashing, it is necessary to clean,
The five-way valve 100 and the three-way valve 101 are switched to the cleaning side to form a cleaning channel C, and water is flowed through the cleaning channel C to clean the filter 1.
The sand 105 of No. 04 is washed and discharged from the drain pipe 109. When this cleaning is completed, the five-way valve 100 and the three-way valve 1 are connected again.
01 to the filtration side to form a filtration channel A, whereby water is pumped from the well or water tank to the pipe 1 by driving the pump 102.
03 to the filter 104, and this filter 10
The water filtered through the sand 105 and filter 106 in step 4 is transferred to pipe 1.
Water is sent to houses etc. via 07.

0004

[Problems to be Solved by the Invention] As described above, in a small water purification system that supplies water to a house, filtration, backwashing, and washing operations are performed, but these operations are performed by a five-way valve located on the supply side. It is necessary to operate each of the three-way valves disposed on the cleaning side, and switching operations are troublesome.

[0005] In addition, special piping is required to form the cleaning flow path in addition to the filtration flow path and the backwash flow path, and two valves, a five-way valve and a three-way valve, are provided, making the piping structure difficult. It is complicated and requires a large number of parts, and is not particularly suitable for use in small-sized water purification systems.

The present invention was developed in view of the above circumstances, and has a simple and compact valve structure.Furthermore, filtration, backwashing, and washing can be selectively switched by valve operation, and the piping structure is simple.
The purpose of the present invention is to provide a water pipe switching device for a water purification system that also improves operability.

[0007]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the water pipe switching device for a water purification system of the present invention provides a water purification system that filters water with a filter and sends water through filtration, backwashing, and cleaning. The switching valve has a main body and a valve body rotatably provided on the main body, and the main body has an upstream side that communicates with a supply pipe that supplies water. A supply passage, a downstream supply passage that communicates with the supply pipe connected to the upstream side of the filter, an upstream water purification passage that communicates with the water purification pipe connected to the downstream side of the filter, and a water purification pipe that conveys water. A downstream purified water passage that communicates with the drain pipe and a drainage passage that communicates with the drainage pipe are formed in the valve body, and the valve body communicates with the upstream supply passage and the downstream supply passage at the filtration rotation position, and the upstream purified water passage communicates with the downstream supply passage. The passage communicates with the downstream water purification passage, the upstream supply passage and the upstream water purification passage communicate with each other at the backwash rotation position, and the downstream supply passage and the drainage passage communicate with each other, and the upstream supply passage communicates with the drainage passage at the washing rotation position. The present invention is characterized in that a switching communication passage is formed that communicates the side supply passage with the downstream supply passage and also communicates the upstream water purification passage with the drainage passage.

[0008]

[Operation] In the water pipe switching device for the water purification system of the present invention, when the valve body is placed in the filtration rotation position, the upstream supply passage and the downstream supply passage of the main body communicate with each other, and the upstream and downstream water purification passages communicate with each other. communicate with each other to form a purified water flow path. Further, when the valve body is placed in the backwash rotation position, the upstream supply passage and the upstream clean water passage of the main body communicate with each other, and the downstream supply passage and the drainage passage communicate with each other to form a backwash passage. Further, when the valve body is placed in the cleaning rotation position, the upstream supply passage and the downstream supply passage of the main body communicate with each other, and the upstream purified water passage and the drainage passage communicate with each other to form a cleaning passage.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 is an overall schematic diagram of the water purification system.
FIG. 2 is a schematic diagram of the water pipe switching device of this water purification system.

As shown in FIG. 1, in the water purification system, water from a well or a water tank is sequentially supplied from a sand filter 2 to a carbon filter 3 arranged in parallel by a pump 1 and filtered.
This filtered water is sent to the house 4, where the filtered water is used for cooking water 5, washing water 6, bath water 7, etc. A water pipe switching device 10 is attached to the sand filter 2, and the water pipe switching device 10 can selectively switch between filtration, backwashing, and washing.

The switching valve 11 of this water pipe switching device 10 is as follows:
As shown in FIG. 2, it has a main body 12 and a valve body 13 rotatably provided on the main body 12, and the valve body 12 is rotated by operating an operating lever 14. This operating lever 14 is shown in Figure 2.
In this figure, the water purification system is in the filtration rotation position, and the water supply and water supply during normal filtration operation of this water purification system are shown by white arrows.

As shown in FIG. 2, the main body 12 of the switching valve 11 includes a supply pipe 15 connected to the pump 1, a supply pipe 16 connected to the upstream side of the sand filter 2, and a supply pipe 16 connected to the upstream side of the sand filter 2. Water purification pipe 17 connected to the downstream side, water purification pipe 1 for water supply
8 and drainage pipe 19 are connected, and when the operating lever 14 is operated and the valve body 13 is rotated to place the valve body 13 in the filtration rotation position, a purified water flow path A is formed, and when the valve body 13 is placed in the backwash rotation position, the water purification flow path A is formed. A backwash flow path B is formed, and a wash flow path C is formed when the valve body 13 is placed in the wash rotation position.

[0013] In this way, when the water purification channel A is formed by operating the switching valve 11, the water supplied to the upstream side of the sand filter 2 is filtered through the sand 8 and then through the ceramic filter 9 to be purified. . In addition, when the backwash flow path B is formed by operating the switching valve 11, water is supplied to the downstream side of the sand filter 2 and flows back through the ceramic filter 9 and the sand 8 in that order, so that there is no dirt stuck in the sand 8. The mud floats up and is discharged from the drainage pipe 19. Furthermore, when the cleaning channel C is formed by operating the switching valve 11, the water supplied to the upstream side of the sand filter 2 passes through the sand 8 and then the ceramic filter 9, and after cleaning these, the water is discharged from the drainage pipe 19. It is discharged.

Next, the switching valve of this water pipe switching device will be explained. Figure 3 is a plan view of the switching valve of the water piping switching device in the filtration state, Figure 4 is a partially cutaway cross-sectional view of the switching valve of the water piping switching device in the filtration state, and Figure 5 is the valve body in the filtration state. FIG. 6 is an exploded perspective view of the switching valve of the water piping switching device in a filtering state.

The main body 12 of the switching valve 11 includes a supply pipe 15.
an upstream supply passage 120 communicating with the sand filter 2, a downstream supply passage 121 communicating with the supply pipe 16 connected to the upstream side of the sand filter 2, and a water purification pipe 1 connected to the downstream side of the sand filter 2.
7, a downstream water purification passage 123 that communicates with the water purification pipe 18, and a drainage passage 124 that communicates with the drainage pipe 19.

The cylindrical portion 12a of the main body 12 has an upstream supply passage 120, an upstream purified water passage 122, and a downstream purified water passage 1.
23 inner ports 120a, 122a, 123a are opened, respectively, and these outer ports 120b, 122b are opened.
, 123b are open in the same direction, which facilitates piping arrangement and piping work.

The cylindrical portion 12a of the main body 12 has a stepped portion 1 inside.
2b is formed, into which the packing 20 is inserted. The protrusion 20a of the packing 20 engages with the recess 12c of the stepped portion 12b to prevent rotation. Packing 20
A large-diameter hole 21 is formed in the shaft portion of the shaft, and two small-diameter holes 22 are formed around the large-diameter hole 21. Port 121a
The small-diameter hole portion 22 further communicates with the bottom port 124a of the drainage passage 124, and further communicates with the downstream supply passage 1.
The outer port 121b of No. 21 opens toward the valve axis, and the outer port 124b of the drainage passage 124 opens toward the downstream water purification passage 123.
It opens in the same direction adjacent to the outer port 123b.

The main body 12 includes a rotation switching valve portion 13 of a valve body 13.
a is rotatably provided via an O-ring 23, and a cover 25 is inserted through the shaft portion 13b of this valve body 13 via an O-ring 24, and is fastened and fixed to the valve body 13 with screws 26. An O-ring 27 is provided between the valve body 13 and the cover 25. Further, a spring 29 is provided between the cover 25 and a plate 28 applied to the rotation switching valve portion 13a, and urges the rotation switching valve portion 13a toward the packing. The operating lever 14 is engaged with the end of the shaft portion 13b of the valve body 13 that protrudes from the cover 25, and the washer 30
, 31 and are tightened and fixed with bolts 32, and the valve body 13 is rotated by the operation lever 14.

In FIG. 3, the operating lever 14 is in the filtration operating position S.
1, and at this time, it is in contact with the stopper 60 and positioned, and is in the filtration state. When the operating lever 14 is moved in the direction of the arrow and operated to the backwashing operation position S2, the backwashing state is entered, and at this time, the stopper 61 is contacted and positioned. When the operating lever 14 is moved in the direction of the arrow and operated to a cleaning operation position S3 between the two, the cleaning state is entered.

The rotation switching valve portion 13a of the valve body 13 has a partition wall 1.
3c defines a first switching communication passage 130 and a second switching communication passage 131, and this first switching communication passage 130 is connected to the bottom port 13.
0a, 130b and a side port 130c, and the second switching communication path 131 has a bottom port 131a and a side port 13
1b, and by rotating this valve body 13, it is possible to selectively switch between filtration, backwashing, and cleaning.

Next, the operation of this water pipe switching device will be explained based on FIGS. 7 to 12. Figure 7 is a sectional view of the switching valve in the filtration rotation position, Figure 8 is a diagram showing the filtration flow path in the filtration rotation position of Figure 7, and Figure 9 is a sectional view of the switching valve in the backwash rotation position. , FIG. 10 is a diagram showing the backwash flow path at the backwash rotation position in FIG. 9, FIG. 11 is a sectional view with the switching valve in the cleaning rotation position, and FIG. 12 is a diagram showing the cleaning flow at the cleaning rotation position in FIG. FIG.

As shown in FIGS. 7 and 8, when the valve body 13 is operated to the filtration rotation position, the inner port 12 of the main body 12
0a and the side port 130c of the rotation switching valve section 13a communicate with each other, and at the same time, the bottom port 130a of the rotation switching valve section 13a and the bottom port 121a of the main body 12 communicate with each other. Main body 12 via passage 130
An upstream supply passage 120 and a downstream supply passage 121 communicate with each other. In addition, the inner ports 122a and 123 of the main body 12
a communicates with the side port 131a of the rotary switching valve portion 13a, and the upstream purified water passage 122 and downstream purified water passage 123 of the main body 12 communicate with each other via the second switching communication passage 131, and the purified water flow path A is formed.

Further, as shown in FIGS. 9 and 10, when the valve body 13 is operated to the backwash rotation position, the inner ports 120a, 122a of the main body 12 and the side port 131b of the rotation switching valve portion 13a communicate with each other. Now, the upstream supply passage 120 and the downstream purified water passage 122 of the main body 12 are communicated with each other via the second switching communication passage 131 of the rotation switching valve portion 13a. At the same time, the bottom port 121a of the main body 12 and the bottom port 130a of the rotation switching valve part 13a communicate with each other, and further, the bottom port 130b and the bottom port 124a communicate with each other.
The downstream supply passage 1 of the main body 12 via the switching communication passage 130
21 and the drainage passage 124 are communicated with each other to form a backwash passage B.

Furthermore, as shown in FIGS. 11 and 12,
When the valve body 13 is operated to the cleaning rotation position, the inner port 120a of the main body 12 and the side port 1 of the rotation switching valve part 13a
30c is in communication, and at the same time, the bottom port 130a of the rotation switching valve part 13a and the bottom port 121a of the main body 12 are in communication,
With this, the upstream supply passage 120 and the downstream supply passage 121 of the main body 12 communicate with each other via the first switching communication passage 130 of the rotation switching valve portion 13a. In addition, the inner port 12 of the main body 12
2a communicates with the side port 131b of the rotation switching valve section 13a, and the bottom port 131a of the rotation switching valve section 13a communicates with the main body 1.
This communicates the upstream water purification passage 122 and the drainage passage 124 of the main body 12 via the second switching communication passage 131, thereby forming a cleaning passage C.

[0025]

Effects of the Invention As described above, the water piping switching device of the present invention is equipped with a switching valve that can selectively switch between filtration, backwashing, and cleaning. The side supply passage and the downstream supply passage communicate with each other, and the upstream purified water passage and the downstream purified water passage communicate with each other to form a purified water passage, and when the valve body is placed in the backwash rotation position, the upstream supply of the main body The passage and the upstream water purification passage communicate with each other, and the downstream supply passage and the drainage passage communicate with each other to form a backwash passage, and when the valve body is in the cleaning rotation position, the upstream supply passage and the downstream side of the main body communicate with each other. It has a simple and compact valve structure in which the supply passage communicates with the upstream purified water passage and the drainage passage to form a cleaning passage, and filtration, backwashing, and cleaning can be selectively switched by valve operation. This simplifies the piping structure and improves operability.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic diagram of a water purification system.

FIG. 2 is a schematic diagram of a water pipe switching device of a water purification system.

FIG. 3 is a plan view of the switching valve of the water pipe switching device in a filtering state.

FIG. 4 is a cross-sectional view of the switching valve of the water piping switching device in a partially broken filtration state.

FIG. 5 is a sectional view of the valve body in a filtering state.

FIG. 6 is an exploded perspective view of the switching valve of the water piping switching device in a filtering state.

FIG. 7 is a cross-sectional view of the switching valve in the filtration rotation position.

FIG. 8 is a diagram showing the filtration channel at the filtration rotation position in FIG. 7;

FIG. 9 is a cross-sectional view of the switching valve in the backwash rotation position.

FIG. 10 is a diagram showing the backwash flow path at the backwash rotation position of FIG. 9;

FIG. 11 is a cross-sectional view of the switching valve in the cleaning rotation position.

FIG. 12 is a diagram showing the cleaning flow path at the cleaning rotation position of FIG. 11;

FIG. 13 is a schematic diagram of a water pipe switching device of a conventional water purification system.

[Explanation of symbols]

2　Sand filter machine 10 Water piping switching device 11 Switching valve 12 Main body 13 Valve body 14 Operation lever 120 Upstream supply passage 121 Downstream supply passage 122 Upstream water purification passage 123 Downstream water purification passage 124 Drain passage 130 First switching communication path 131 Second switching communication path A　Water purification channel B Backwash flow path C Cleaning channel

Claims (1)

[Claims] [Claim 1] A water purification system that filters water with a filter and sends water is equipped with a switching valve that can selectively switch between filtration, backwashing, and washing, and this switching valve can be rotated between the main body and the main body. The main body has an upstream supply passage communicating with a supply pipe that supplies water, and a downstream supply passage communicating with a supply pipe connected to the upstream side of the filter. An upstream water purification passage communicating with the water purification piping connected to the downstream side of the filter, a downstream water purification passage communicating with the water purification piping for water supply, and a drainage passage communicating with the drainage piping are formed, and the valve body The upstream supply passage and the downstream supply passage communicate with each other at the filtration rotation position, and the upstream water purification passage and the downstream water purification passage communicate with each other, and the upstream supply passage and the upstream side communicate with each other at the backwash rotation position. The water purification passage communicates with the downstream supply passage and the drainage passage, and at the cleaning rotation position, the upstream supply passage and the downstream supply passage communicate with each other, and the upstream water purification passage and the drainage passage communicate with each other. A water piping switching device for a water purification system, characterized in that a switching communication path is formed.