JP3144518B2 - Contaminant removal device in running water pipe - Google Patents

Abstract

PURPOSE:To efficiently perform the backwashing work of a filter member and to dispense with the opening and closing operation of an opening and closing valve due to a worker. CONSTITUTION:Impurities are caught by a filter member 4 and the clogging of the filter member 4 is gradually advanced. When pressure difference of a predetermined value or more is generated between the upstream and downstream sides of an impurity removing device before long by the clogging of the filter member 4, this pressure difference is detected by a backwashing device to open an opening and closing valve 22 to start backwashing work. When the clogging of the filter member 4 is eliminated by backwashing and the pressure difference between the upstream and downstream sides of the impurity removing device becomes a predetermined value or less, this state is detected by the backwashing control device to close the opening and closing valve 22 to complete backwashing work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing impurities contained in running water flowing through a water pipe.

[0002]

2. Description of the Related Art Generally, in a flowing water pipe, for example, a ductile cast iron pipe or the like, a mortar lining is provided on an inner surface of the pipe to prevent rust, so that the quality of water supplied to each household is guaranteed. However, in order to take out the branch pipe from the upstream side of the water pipe as needed, the water pipe is drilled, and further the water pipe is cut. In these construction processes, metal powder is generated, and furthermore, a metal portion is exposed during drilling and cutting of the flowing water pipe, and rust is generated in this part, so there was a problem that these metal powder and rust powder flow in the flowing water pipe. . In addition, most of the drilling and piping work is performed underground, and sand or the like may enter the running water pipe, making it difficult to ensure water quality.

Therefore, the applicant of the present invention has applied for a foreign matter removing apparatus for automatically cleaning a filter member prior to the present application, and this apparatus penetrates a case covering a part of a flowing water pipe by a rotating partition plate. The discharge chamber is provided with an on-off valve that allows water to flow into the atmosphere.The filter member is fixed in the through chamber, and the rotating partition plate is insulated from the filter member. The plate is fixed, the backwashing room is constituted by the filter member, the rotating partitioning plate and the separator, and the backwashing room and the discharge chamber communicate with each other through a hole, and the rotating partitioning plate is rotated by opening the on-off valve. This is a contaminant removal device in which a rotation drive device for causing the rotation is formed.

[0004] This contaminant removal device not only removes contaminants in running water by a filter member, but also opens and closes the on-off valve when clogging occurs in the filter member to such an extent that the flow of flowing water in the water pipe is hindered. The valve has a very advantageous effect of backwashing the filter member by utilizing the static pressure in the water pipe, removing contaminants from the filter member and discharging the same to the outside.

[0005]

However, it is difficult to directly check the condition of clogging of the filter member from the outside in the conventional foreign matter removing device, and therefore, every fixed period of use, Alternatively, it is necessary to open the on-off valve and backwash the filter member each time the water pressure drops on the final user side. Therefore, such a backwash operation is not only inefficient, but also involves a problem that the operator has to open and close the on-off valve each time, which is very troublesome.

[0006] The present invention has been made in view of such problems, automatically opening and closing the on-off valve according to the condition of clogging of the filter member, the flow in the opening of the closing valve
Another object of the present invention is to efficiently perform backwashing of a filter member by effectively using the power of flowing water .

[0007]

In order to achieve the above object, the apparatus for removing impurities in a water pipe according to the present invention is characterized in that a case covering a part of the water pipe is divided into a through chamber and a discharge chamber by a rotary partition plate. Sectioning, providing an on-off valve that allows water to flow out to the atmosphere in the discharge chamber, and a filter member fixed in the penetration chamber,
Further, the rotating partition plate is fixed with a separator inscribed in the filter member, and the filter member, the rotary partition plate and the separating plate constitute a backwashing room, and a foreign matter removing device, wherein the upstream side of the foreign matter removing device is provided. When the pressure difference on the downstream side exceeds a predetermined value, the on-off valve is opened, and when the pressure difference becomes equal to or less than the predetermined value, a backwash control device for closing the on-off valve is provided.
In the hole communicating with the
It is characterized in that a rotary drive device comprising a nozzle to be turned is provided .

[0008]

The contaminants mixed in the flowing water in the water pipe are captured by the filter member, whereby the filter member is gradually clogged. Eventually, when a pressure difference of a predetermined value or more is generated between the upstream side and the downstream side of the foreign matter removing device due to clogging of the filter member, the backwash control device detects this and opens the on-off valve . From backwash room to discharge room
When running water is generated, the running water is discharged through a nozzle.
Will be, to rotate the rotary partition plate in this force, backwash operation Ru is started. When the clogging of the filter member is eliminated by the backwash and the pressure difference between the upstream side and the downstream side of the contaminant removal device becomes a predetermined value or less, the backwash control device detects this and closes the on-off valve. And end the backwashing operation.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a water pipe as a running water pipe, and a substantially cylindrical case 2 is fitted to the water pipe 1 in a watertight manner. Fixed. The axis of the substantially cylindrical case 2 extends substantially perpendicularly to the axis of the water pipe 1 and coincides with the through chamber 3 formed in the water pipe 1 by a drilling means such as a drill.
A cylindrical filter member 4 that is attached to the penetration chamber 3 so as to block flowing water in the water pipe 1 and catches foreign substances caused by the flowing water in the water pipe 1 is arranged.

The filter member 4 is formed in a mesh shape, and has a hole 5 on its front face for receiving flowing water and foreign substances. On the periphery of the lower end of the cylindrical filter member 4, an annular bearing frame 8 for supporting a rotating partition plate 7 of the backwashing chamber 6, which will be described later, is mounted. As shown in FIG. 2, the filter member 4
Is fixedly held between an annular holding member 9 fixed to the inner wall of the disk and a disk-shaped holding member 11 pressed by the lid 10. The holding member 11 has a seal member 12 on the outer peripheral surface thereof.
The case 2 is hermetically sealed while being inserted into the case 2.

A spindle 14 is provided in the filter member 4.
Are separated by a boss 15 attached to the spindle 14 and are integrally connected to each other by a boss portion 15 having a center angle α. The rotary partition plate 7 attached to the portion 15 is disposed rotatably concentrically with respect to the filter member 4. In this case, the two separators 16 have substantially the same height as the filter member 4.

The separating plate 16 and the rotating partition plate 7 integrally connected to each other by the boss portion 15 are separated from each other by the filter member 4.
The backwashing chamber 6 having a fan-shaped cross section with a central angle α is formed between the two separators 16 and the inner peripheral surface of the filter member 4.

The backwashing chamber 6 is closed at the upper end by a holding member 11, but has a discharge hole 18 provided in the rotary partition plate 7 and a nozzle 13 attached to the discharge hole 18 at the lower end. The discharge chamber 19 communicates with the discharge chamber 19 of the case 2 through a discharge pipe 21 connected to the case bottom wall 20 and an on-off valve 22 interposed in the discharge pipe 21.
Thus, it can be freely opened to the outside (mainly the atmosphere). In this case, the nozzle 13 is fixedly mounted in a state where its jetting direction is directed to the tangential direction of the rotation orbit circle of the rotary partition plate 7, and the discharge chamber 19 of the case 2 includes the rotary partition plate 7 and the holding member 9. Thereby, it is completely separated from the running water area other than the backwashing chamber 6.

The spindle 14 is supported at its lower end by a bearing recess 20a of the case bottom wall 20.
The upper end portion penetrates the holding member 11 and the lid 10. Therefore, the spindle 14, and thus the separator 16 and the rotating partition plate 7, can be arbitrarily rotated via the upper end of the spindle 14 protruding from the lid 10.

The seal piece 17 shown in FIG. 1 is for separating the inflow side and the outflow side of the filter member 4 from each other.
It is in contact with the outer peripheral surface of the filter member 4 over its entire height.

A pinion 24 is fixed to a valve operating shaft 23 of the on-off valve 22. The pinion 24 is formed integrally with a piston rod 26 of a hydraulic actuator 25 which forms a part of a backwash control device. It is in mesh with the rack 27. The backwash control device monitors the pressure difference between the upstream side and the downstream side of the foreign matter removing device in the water pipe 1 and controls the opening and closing of the on-off valve 22 according to the magnitude of the pressure difference. This controls the backwashing of the water. Such a backwash control device can be arbitrarily configured electrically or mechanically.

The flowing water in the water pipe 1 flows from left to right as shown by an arrow P in FIGS. At this time, since the flowing water flows through the cylindrical filter member 4 from the inside to the outside, impurities mixed in the flowing water are captured on the inner peripheral surface side of the filter member 4 and gradually there. Deposited on When the accumulation of the impurities progresses to some extent, clogging of the filter member 4 eventually generates a considerable resistance in the water flow in the water pipe 1, and due to this, a predetermined value is set on the upstream and downstream sides of the impurity removing device. The above pressure difference occurs. This pressure difference is detected by the backwash control device, and the backwash control device opens the on-off valve 22 via the hydraulic actuator 25.

Then, the backwashing chamber 6 is opened to the outside (mainly the atmosphere) through the discharge hole 18 of the rotary partition plate 7, the discharge chamber 19 of the case 2, and the discharge pipe 21. This allows
In the arc region a having the center angle α of the filter member 4 surrounded by the backwashing chamber 6, a relatively high static pressure on the water pipe 1 side (ie, the outside) and a relatively low static pressure on the backwashing chamber 6 side (ie, the inside). Since the external pressure acts, a backwashing action occurs based on the pressure difference.

At this time, since the water flows out from the discharge hole 18 of the backwashing chamber 6 to the discharge chamber 19 through the nozzle 13, the nozzle 1
The rotating partition plate 7 is rotated by the jetting force of the water from the third. Therefore, the arc region a of the filter member 4 that is subjected to the backwashing action automatically moves over the entire impurity capturing region of the filter member 4 with the rotation of the rotary partition plate 7.

All the foreign substances thus deposited on the inner peripheral surface of the filter member 4 are completely removed by the backwashing operation and discharged from the discharge pipe 21. As a result, the resistance of the water flow by the filter member 4 decreases again, and when the pressure difference between the upstream side and the downstream side of the foreign matter removing device becomes equal to or less than a predetermined value, the backwash control device opens and closes the valve via the hydraulic actuator 25. 2
Since the valve 2 is closed again, the backwashing operation ends.

FIGS. 3 and 4 show a first embodiment of the backwash control device.

This backwashing control device comprises a hydraulic actuator 2
5, as means for driving and controlling the hydraulic actuator 25, a normally closed differential pressure valve 28 and a normally open differential pressure valve 29 for pressurization control,
Further, a normally open differential pressure valve 30 and a normally closed differential pressure valve 31 for pressure reduction control are provided. In this case, the differential pressure valves 28, 29, 30, 3
The water pressure on the upstream side and the water pressure on the downstream side of the impurity removing device are introduced into the high pressure chamber 32 and the low pressure chamber 33 through the conduits 46 and 53, respectively.

Each of the inlets 34 of the normally closed differential pressure valve 28 and the normally open differential pressure valve 29 for controlling pressurization is connected to the upstream side of the impurity removing device via a conduit 46. , 2
Each of the outlets 9 is connected to two pressurizing chambers 38, 39 of the hydraulic actuator via conduits 36, 37, respectively. Further, the respective inlets 34 of the normally open differential pressure valve 30 and the normally closed differential pressure valve 31 for pressure reduction control are connected to two pressurizing chambers 38 and 39 of the hydraulic actuator 25 via conduits 40 and 41, respectively. , Each outlet 35 of both differential pressure valves 30, 31
Is open to the outside (mainly the atmosphere).

According to such a configuration, since the hydraulic actuator 25 is driven by the energy of the water flow flowing in the water pipe 1, there is no need to additionally provide an external pressure source or energy source.

In the initial state shown in FIG. 3, the pressure difference between the upstream side and the downstream side of the contaminant removal device is less than a predetermined value,
An external low pressure is introduced into the pressurizing chamber 38 on the left side of the hydraulic actuator 25 by the normally closed differential pressure valve 28 and the normally open differential pressure valve 30, and the normally open differential pressure valve 29 is And the normally closed differential pressure valve 31 guides high pressure in the water pipe 1 on the upstream side of the impurity removing device. Therefore, the piston rod 26 of the hydraulic actuator 25 closes the on-off valve 22 by maintaining the left end position shown in the figure.

However, when the pressure difference between the upstream side and the downstream side of the contaminant removing device becomes greater than a predetermined value due to clogging of the filter member 4, each of the differential pressure valves 28, 29, 30, and 31 is switched to the state shown in FIG.
Are opened and closed almost simultaneously, as shown in FIG. 3, the high pressure upstream of the foreign matter removing device is led to the pressurizing chamber 38 on the left side of the hydraulic actuator 25 and the external low pressure is led to the pressurizing chamber 39 on the right side. I will Therefore, the piston rod 26 gradually moves to the right due to the generated pressure difference, and the on-off valve 22
To release.

Opening of the on-off valve 22 causes the filter member 4
When the clogging of the filter member 4 is eliminated by backwashing, the pressure difference between the upstream side and the downstream side of the foreign matter removing device eventually becomes equal to or less than a predetermined value. At this time, the differential pressure valves 28, 29, 3
0, 31 are again switched to the initial position as shown in FIG. 3, and the piston rod 26 of the hydraulic actuator 25 is moved to the left, whereby the on-off valve 22 is closed again and the backwashing operation is completed. I do.

FIGS. 5 and 6 show a second embodiment of the backwash control device.

This second embodiment is substantially similar to the first embodiment.
Differential pressure valves 28, 29, 30, 3 in the embodiment
1 is integrated into one switching valve 42 and one differential pressure actuator 43 for switching the switching valve 42. In this case, each connection port of the switching valve 42 including the valve spool 44 and the valve casing 45 is connected to each of the conduits 46, 47, 4
8 and 49, the upstream side of the contaminant removal device and each of the pressurizing chambers 38 and 39 of the hydraulic actuator 25 and the outside (mainly the atmosphere)
And the valve spool 44 and the drive rod 50
High pressure chamber 51 of differential pressure actuator 43 connected through
The low pressure chamber 52 is connected to the upstream side and the downstream side of the impurity removing device via conduits 46 and 53, respectively.

The backwash control device according to the second embodiment has substantially the same operation as the backwash control device according to the first embodiment, and a detailed description thereof will be omitted. FIG.
4 corresponds to the switching positions of the four differential pressure valves 28, 29, 30, and 31 shown in FIG. 3, and the switching positions of the switching valve 42 shown in FIG. This corresponds to the switching position of the differential pressure valves 28, 29, 30, 31. In this case, it is needless to say that the differential pressure actuator 43 shown in a reduced scale in FIGS. 5 and 6 can generate a sufficient stroke and force to switch the switching valve 42.

Although the embodiment has been described with reference to the drawings, the specific configuration is not limited to the embodiment, and any changes or additions without departing from the gist of the present invention are included in the present invention. It is.

For example, a pneumatic actuator or an electric actuator other than a hydraulic actuator can be used as a driving means for opening and closing the on-off valve 22, and various actuators can be electrically driven and controlled by a microcomputer or the like. It is possible.

[0033]

[0034]

According to the apparatus for removing contaminants in a water pipe according to the present invention, impurities mixed in running water in the water pipe are filled.
The filter member is captured by the
Wood clogging progresses gradually. Eventually the filter member
Due to clogging, upstream and downstream of the impurity removal device
If a pressure difference equal to or greater than the specified value is generated, this is
Is detected, and the on-off valve is opened. From the backwash room to the discharge room
When running water is generated, it is discharged through a nozzle.
This force rotates the rotating partition plate and backwashing work
Is started. Backwash removes clogging of filter member
And the pressure difference between the upstream and downstream of the
When the value falls below a predetermined value, the backwash control device detects this,
Close the on-off valve and end the backwashing operation.

[0035]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of discharging impurities according to an embodiment.

FIG. 2 is a sectional view taken along the line BB of the embodiment of FIG. 2;

FIG. 3 is a schematic sectional view of the backwash control device of the first embodiment at the time of non-backwash.

FIG. 4 is a schematic cross-sectional view of the backwash control device of the first embodiment during backwash.

FIG. 5 is a schematic sectional view of the backwash control device according to the second embodiment at the time of non-backwash.

FIG. 6 is a schematic cross-sectional view of the backwash control device of the second embodiment during backwash.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Water pipe 2 Case 3 Penetration room 4 Filter member 5 Hole 6 Backwash room 7 Rotating partition plate 8 Supporting frame 9 Holding member 10 Lid 11 Holding member 12 Seal member 13 Nozzle (rotation drive) 14 Spindle 15 Boss 16 Separation plate 17 Seal piece 18 Discharge hole 19 Discharge chamber 20 Case bottom wall 20a Bearing recess 21 Discharge pipe 22 On-off valve 23 Valve operating shaft 24 Pinion 25 Hydraulic actuator 26 Piston rod 27 Rack 28, 31 Normally closed differential pressure valve 29, 30 Normal Open differential pressure valve 32 High pressure chamber 33 Low pressure chamber 34 Inlet 35 Outlet 36, 37 Conduit 38, 39 Pressurizing chamber 40, 41 Duct 42 Switching valve 43 Differential pressure actuator 44 Valve spool 45 Valve casing 46 Duct 47, 48 Duct 49 Duct 50 Drive rod 51 High pressure chamber 52 Low pressure chamber 53 Conduit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B01D 35/02 B01D 35/16 F16L 55/24

Claims (5)

(57) [Claims] 1. A case that covers a part of a flowing water pipe is divided into a through chamber and a discharge chamber by a rotary partition plate, and an open / close valve that allows water to flow out to the atmosphere is provided in the discharge chamber. A filter member is fixed, and a separating plate inscribing the filter member is fixed to the rotating partition plate, and the filter member, the rotating partition plate and the separating plate constitute a backwashing room, and a foreign matter removing device.
A location, backwash control pressure difference between the upstream side and the downstream side of the impurity removing device is opened to the on-off valve exceeds a predetermined value, the pressure difference closes the on-off valve becomes less than a predetermined value set the device
The hole connecting the backwash chamber and the discharge chamber
Consists of a nozzle that rotates a rotating partition plate by firing force
An apparatus for removing contaminants in a running water pipe, comprising a rotary drive device. 2. A backwash control device detects and switches between a hydraulic actuator that opens and closes an on-off valve and a pressure difference between an upstream side and a downstream side of the foreign matter removing device, thereby switching each of the hydraulic actuators. The apparatus for removing impurities in a flowing water pipe according to claim 1, further comprising a switching valve that supplies a liquid pressure to the pressure chamber. 3. The switching valve comprises two normally closed differential pressure valves and two normally open differential pressure valves, and one of the normally closed differential pressure valves and the normally open differential pressure valve is
3. The flow pipe according to claim 2, wherein the hydraulic actuator is connected to one pressurizing chamber, and the other normally open differential pressure valve and the normally closed differential pressure valve are connected to the other pressurizing chamber of the hydraulic actuator. Contaminant removal equipment. 4. The apparatus for removing contaminants in a water pipe according to claim 2, wherein the switching valve is one multi-directional switching valve. 5. The hydraulic pressure actuator according to claim 2, wherein the water pressure on the upstream side of the impurity removing device is selectively supplied to each pressurizing chamber of the hydraulic actuator via a switching valve. 3. The apparatus for removing contaminants in a water pipe according to claim 1.