JP2002168354A - Strainer incorporated ball valve with cleaning function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent failure and service life deterioration of downstream apparatuses caused in such that a foreign material is easily to stick to a strainer upon the cleaning of a distributing pipe due to no drain port at a ball valve fitted with the strainer for filtering a foreign material in a distributing pipe for a water supply system, and accordingly, a coarse strainer is employed thereto, to provide an insufficient filtering of the foreign material in the pipe. SOLUTION: This strainer incorporated type ball valve 1 with a cleaning function is provided with an inlet port 14, an outlet port 15, the drain port 16, a three way valve element 20, and the strainer 22 or the like. Normally, water is lead from the inlet port 14 to the outlet port 15 via the strainer 22. When cleaning an interior of the distributing pipe after installation, the inlet port 14 is communicated with the drain port 16, the strainer 22 is positioned in a side opposite to the drain port 16, and water used for cleaning is discharged from the drain port 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball valve having a cleaning function and a built-in strainer, which is provided with a water inlet, a water outlet and a drain port in a valve case, and a strainer mounted on a ball-shaped three-way valve body. The present invention relates to a structure in which a water inlet port can communicate with a drain port when cleaning the inside of a pipe to which a valve is connected.

[0002]

2. Description of the Related Art Conventionally, a water supply system in a building or a middle-to-high-rise house is provided with a pump unit, a water distribution pipe, a water receiving tank, and valves, and a plurality of terminals of the water supply system are provided with a water heater, a bath unit, and the like. Build the building and middle- and high-rise houses,
At the time when the water supply system is installed, foreign matters such as metal powder and small metal pieces generated when the water distribution pipe is screwed into the water distribution pipe, and small pieces of a synthetic resin piping joint material often remain. Therefore, when water is passed for the first time after the installation of the water supply system, it is necessary to clean the inside of the water distribution pipe in order to remove foreign substances in the water distribution pipe.

[0003] In order to clean the inside of the water distribution pipe, it is desirable that the drain pipe be connected to the downstream side of the water distribution pipe and the water be passed through the water distribution pipe for cleaning. However, since the drain pipe is not usually connected to the water pipe of the water supply system, it is not easy to clean the inside of the water pipe. Conventionally, a ball valve with a built-in strainer having a function of filtering foreign substances in the water distribution pipe has been put to practical use. This ball valve with a built-in strainer forms a water inlet and a water outlet in the valve case, forms a straight internal passage that connects the water inlet and the water outlet to the ball-shaped valve body, and approaches the water inlet of this internal passage. It is equipped with a basket-shaped strainer. An opening forming member is detachably screwed to the valve case for attaching and detaching the strainer.

In a normal use state, the water inlet and the water outlet are in communication with each other, and water flows from the water inlet to the water outlet while filtering foreign matter in the water distribution pipe by the strainer. If the strainer is clogged, rotate the ball-shaped valve body, close the water inlet, make the strainer approach and face the open-port forming member, remove the open-port forming member, and remove the strainer. to clean up. After the cleaning, the strainer is mounted again, the opening forming member is mounted by screwing, and the ball-shaped valve body is switched to the original position.

[0005]

The above-mentioned ball valve with a built-in strainer has no particular problem in a normal use state. However, after the installation of the water supply system, when water is passed through the water pipe connected to the ball valve to wash foreign matter in the water pipe,
Since water cannot be drained from the ball valve, water is flowed into the water distribution pipe to flow through the ball valve, and foreign matter is filtered by the strainer inside the ball valve. It is common to use it as it is for subsequent use.

In this case, if the mesh of the strainer is too fine, the strainer is clogged with foreign matter during washing of the water pipe. Therefore, as the strainer, a strainer having a relatively coarse mesh (for example, a mesh of # 5 to # 20) Stainless steel wire mesh). However, when such a coarse strainer is applied, during normal use, fine foreign matter flows through the strainer and flows downstream of the ball valve,
Since the device penetrates into a gap between devices (for example, valves and meters) connected to the middle or at the end of the water distribution pipe, the device is likely to be broken down, it is difficult to operate normally, and the life of the device is shortened.

An object of the present invention is to provide a ball valve with a built-in strainer and a cleaning function, which can be drained from a drain port without being filtered by a strainer at the time of passing water for washing in a water distribution pipe.

[0008]

According to a first aspect of the present invention, there is provided a ball valve having a cleaning function with a built-in strainer, a valve case having an inlet, an outlet, and a drain, and a ball-shaped three-way valve having a T-shaped internal passage. A body, a strainer mounted at one end of the internal passage, and an operation mechanism including a valve shaft and a handle for rotating the three-way valve body.In a normal use state, the strainer approaches and faces the water outlet. The drain port is closed and the water inlet is connected to the water outlet, and when cleaning the water distribution pipe connected to the valve case, the water outlet is closed and the water inlet is closed without passing through the strainer. It is characterized in that it is configured to communicate with the drain port.

In this ball valve, the connection state of the internal passage to the water inlet, the water outlet, and the drain can be switched by rotating the three-way valve body by the operating mechanism. In a normal use state, the water supplied to the water inlet is filtered by the strainer and then led out to the water outlet in order to bring the strainer closer to the water outlet, close the drain port and connect the water inlet to the water outlet. . Therefore, foreign matter in the water distribution pipe hardly flows into the equipment downstream of the ball valve.

When the water pipe connected to the valve case is washed at the time of the first water flow before shifting to a normal use state, the three-way valve body is rotated by the operating mechanism to close the water outlet. In addition, the water inlet is communicated with the drain without passing through the strainer, and in this state, water is passed through the water distribution pipe to perform washing. At this time, the foreign matter in the water distribution pipe flows into the internal passage from the water inlet, and is reliably discharged to the outside from the drain port.

According to a second aspect of the present invention, there is provided a ball valve having a cleaning function with a built-in strainer according to the first aspect of the present invention, wherein the valve case is a drain port forming body forming a drain port, and the drain case is detachably screwed. It has a body, and when cleaning the strainer, the strainer is arranged so as to approach the drain port, close the water inlet port, and connect the drain port to the water outlet. If the strainer becomes clogged during normal use, rotate the three-way valve body by the operation mechanism, make the strainer approach and face the drain port, close the water inlet port and connect the drain port to the outlet port. To communicate with In this state, the drain port forming body is removed, the strainer is removed and the strainer is cleaned, then the strainer is mounted again, the drain port forming body is mounted, and then the three-way valve is switched to a normal use state.

According to a third aspect of the present invention, there is provided a ball valve having a cleaning function with a built-in strainer according to the first or second aspect of the invention, wherein the ball valve is interposed between a water distribution pipe and a water receiving tank. In this case, foreign matter flowing from the water distribution pipe to the receiving tank is
It can be removed by this ball valve with a built-in strainer and a cleaning function.

According to a fourth aspect of the present invention, there is provided a ball valve having a cleaning function with a built-in strainer according to the first or second aspect of the present invention, which is installed on the primary side of the pressure-intensifying water supply device.
In this case, foreign matter flowing in the water distribution pipe on the primary side of the booster water supply device can be removed by the ball valve with a built-in cleaning function provided by the trainer. In this case, it is desirable to provide a device mounting portion on the ball valve with a cleaning function with a built-in trainer, and to mount a pressure gauge or a pressure transmitter capable of measuring the incoming water pressure on the device mounting portion.

According to a fifth aspect of the present invention, there is provided a ball valve with a built-in strainer having a cleaning function according to the first or the second aspect of the present invention, wherein the ball valve is provided at an intermediate portion or at an end of a pipe requiring pipe cleaning. . In this case, foreign matters flowing in the water distribution pipe when the water distribution pipe is cleaned can be removed by the ball valve with a cleaning function with a built-in strainer in the middle or at the end of the water distribution pipe.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the ball valve 1 with a built-in strainer and a cleaning function is interposed between a water distribution pipe of a building or a middle- and high-rise house and a water receiving tank, for example. This ball valve 1 with a built-in strainer and having a cleaning function includes a valve case 10, a three-way valve body 20, an operation mechanism 30, and the like. The valve case 10 is made of a metal (for example, copper alloy or cast iron), and the three-way valve body 20 is turned around the axis of the handle shaft 31 in FIG. The three-way valve body 20 is movably accommodated, and the left end and the right end of the three-way valve body 20 are made of a synthetic resin
13 is sealed.

A water inlet 14 (water inlet port) is formed at the left end of the valve case 10, and a water outlet 15 (water outlet port) is formed at the right end of the valve case 10. Drain port 16 (drain port) on the side of
Are formed. The valve case 10 includes a case body 10a.
And a water outlet forming body 10b screwed to the case body 10a
And a drain port forming body 10c screwed into the case body 10.
The water outlet 15 is formed in the water outlet forming body 10b, the drain opening 16 is formed in the drain opening forming body 10c, and the drainer forming body 10c is detached and the strainer 2 is formed.
2 can be attached and detached. Inlet 14 and outlet 1
A water supply pipe can be connected to 5 by screwing, and a drain pipe can be connected to the drain port 16 by screwing. The case main body 10a is formed with a large-diameter device mounting portion 17 for mounting a pressure gauge or a pressure transmitter capable of measuring pressure, and a screw hole 18 communicating with the device mounting portion 17.

The three-way valve 20 has a ball shape made of metal or synthetic resin, and a T-shaped internal passage 21 is formed inside the three-way valve 20. This internal passage 21 is composed of a main passage 21a that passes straight through the three-way valve body 20, and a branch passage 21b that branches off at a right angle from an intermediate portion of the main passage 21a.

The three-way valve body 20 is provided with a strainer 22 located at one end of the main passage 21a of the internal passage 21 and a fixing member 23 for fixing the strainer 22 so as not to be detached. As shown in FIGS. 3A and 3B, the strainer 22 has a fine mesh (for example, #
20 to # 60 mesh) stainless steel wire mesh 22a
And an outer peripheral frame 22b. One handle 22c for hooking a tool is formed on the outer peripheral frame 22b for attaching and detaching the strainer 22. A large-diameter annular groove for mounting the strainer 22 is formed at one end of the main passage 21a, and the strainer 22 and the fixing bracket 23 are fitted into the large-diameter annular groove and are detachably fixed.

The operating mechanism 30 includes a handle shaft 31 for rotating the three-way valve body 20 and a handle 32. The distal end of the handle shaft 31 is fitted and fixed to the three-way valve body 20, and the outer end of the handle shaft 31 A handle 32 is fixed to the portion, and an O-ring 33 for sealing is mounted on the handle shaft 31.

In a normal use state, the operating mechanism 30
By rotating the three-way valve body 20 to the first position shown in FIG. 2, the strainer 22 is brought close to and opposed to the water outlet 15, the drain port 16 is closed, and the water inlet 14 is communicated with the water outlet 15, and the water inlet is formed. Foreign matter in the water flowing in from the strainer 2
The mixture is filtered at 2 and led to the water outlet 15 for use.

After the water receiving tank, the ball valve 1, the water pipe connected to the ball valve 1 and other equipment are installed, when the water pipe is washed with water through the water pipe, the operating mechanism 30 is operated. The internal passage 21 is rotated by rotating the three-way valve body 20 to the second position shown in FIG. 4 through the opening, and the water outlet 15 is closed and the water inlet 14 is connected to the drain port 16 without passing through the strainer 22.
To communicate with At this time, the strainer 22 is located on the side opposite to the drain port 16. Then, water is passed through the water pipe and discharged from the drain port 16 to clean the inside of the water pipe, and foreign matter (metal powder, small metal pieces,
And a small piece of pipe joint material made of synthetic resin) together with water. However, at this time, there is no flow of water passing through the strainer 22, so that foreign matter does not adhere to the strainer 22.

After the washing of the water pipe, the three-way valve body 20 is rotated by the operating mechanism 30 to switch to the normal use position (first position) shown in FIG. If the strainer 22 has been used for a considerable period of time in this state, foreign matter and water scale adhere to the strainer 22. Therefore, it is desirable to clean the strainer 22. When cleaning the strainer 22, the three-way valve body 20 is rotated to the third position shown in FIG. 5 by the operation mechanism 30, the strainer 22 is brought close to and opposed to the drain port 16, and the water inlet 14 is brought into a water-stop state. In addition, the drain port 16 is communicated with the water outlet 15. Next, after removing the drain port forming body 10c, the strainer 22 is removed from the three-way valve body 20, and the strainer 22 is cleaned outside the ball valve 1. The fitting hole 16a at the back of the drain port 16 is formed to have substantially the same diameter as the strainer 22 so that the strainer 22 can be removed as described above.

After the cleaning of the strainer 22, the strainer 22 is mounted on the three-way valve body 20 and the drain port forming body 10 is removed.
c is screwed into the original mounting hole, and the three-way valve body 20 is turned to the first position shown in FIG.
The state is switched to a normal use state in which the water outlet 4 communicates with the water outlet 15. 2, 4 and 5 and the operation mechanism 3
In order to correspond the position of the handle 32 to zero, as shown in FIG. 6, on the outer surface of the valve case 10, for example, arrows 34 and 35 indicating the rotation direction of the handle 32 and the drain port 16 are provided.
Are displayed, and "Cleaning" indicating cleaning of the strainer 22 is marked.

As described above, in the ball valve 1, the first position shown in FIG. 2 where the three-way valve body 20 is used for normal use, and the drain position 16 shown in FIG. The position can be switched between a second position and a third position shown in FIG. 5 in which the strainer 22 is brought close to and opposed to the drain port 16 for cleaning the strainer.

With the three-way valve body 20 held at the first position, the water flowing through the water distribution pipe can be led out to the water outlet 15 while being filtered by the strainer 22. Since the strainer 22 is made of a fine mesh wire mesh, fine foreign substances can be filtered and captured, so that foreign substances can enter small gaps of downstream devices (valves, instruments, etc.). Therefore, the failure of the device due to foreign matter can be prevented, and the life of the device can be extended.

With the three-way valve 20 in the second position,
The water inlet 14 communicates with the drain port 16, the water outlet 15 is closed, the strainer 22 is located on the opposite side of the drain port 16, and the water that has washed the inside of the water distribution pipe is discharged to the drain port 16 without passing through the strainer 22. Can be. At this time, since the water for washing is not filtered by the strainer 22,
Foreign matter hardly adheres to the strainer 22, and there is no need to clean the strainer 22 immediately after washing the water pipe. If the three-way valve body 20 is used at the first position before the water pipe is washed, most of the foreign matter adhering to the strainer 22 is also discharged when the water pipe is washed. can do.

In a state where the three-way valve body 20 is at the third position,
The water inlet 14 is closed, the water outlet 15 communicates with the drain port 16, the strainer 22 approaches the drain port 16, and the drain port forming body 10 c is removed, thereby removing the strainer 22 from the three-way valve body 20 for cleaning. Then, it can be returned to the original state again.

A modified embodiment in which the above embodiment is partially modified will be briefly described. 1) The ball valve 1 has been described as an example of a ball valve mounted between a water distribution pipe and a water receiving tank.
Is applicable to various other parts. For example, in a water supply system of a building or a middle-high-rise house, this ball valve 1
May be installed on the primary side of the booster water supply device, or may be installed in the middle or at the end of a water distribution pipe that requires cleaning of a pipe in a water supply system of a building or a middle- to high-rise house.

2) The ball valve 1 may be interposed not only in the water supply system but also in a water distribution pipe of a water system for various uses.
The present invention is similarly applicable to a piping system in which a liquid such as alcohol flows according to water.

[0030]

According to the first aspect of the present invention, a valve case having an inlet, an outlet, and a drain, a ball-shaped three-way valve, a strainer at one end of an internal passage of the three-way valve, In a normal use state, the strainer is arranged so as to approach and face the water outlet, the drain port is closed and the water inlet is connected to the water outlet, and when cleaning the pipe connected to the valve case, Is configured to close the water outlet and communicate the water inlet to the drain without passing through the strainer, so that the following effects can be obtained.

When water is passed through the pipe to clean the inside of the pipe, the water inlet and the drain are connected to each other, and the water outlet is closed.
Water can be discharged from the water inlet to the drain without filtering with a strainer, and foreign matter in the pipe can be discharged to the outside. When the inside of the pipe is washed, the washing water is discharged without being filtered by the strainer, and the filter is filtered by the strainer during normal use, so that a strainer with a fine mesh can be applied.
As a result, fine foreign matters hardly flow to the downstream side of the ball valve, so that devices (for example, valves and instruments) connected to the downstream side of the ball valve are less likely to fail, and the life is extended.

According to the second aspect of the present invention, the valve case is a drain fitting for forming a drain port and has a drain port forming body which is detachably screwed, and when cleaning the strainer, The strainer can be approached and opposed to the drain port, the water inlet port can be closed and the drain port can be communicated with the water outlet, and the strainer can be removed and the strainer can be cleaned after removing the drain port forming body. After the cleaning, the strainer is attached to the three-way valve body, the drain port forming body is attached by screwing,
After that, when the three-way valve body is switched to the original state, the state becomes a normal use state. The other effects are the same as those of the first aspect.

According to the third aspect of the present invention, since the ball valve is interposed between the water distribution pipe and the water receiving tank, foreign substances flowing from the water distribution pipe to the water receiving tank can be removed by the ball valve. it can. The other effects are the same as those of the first or second aspect.

According to the fourth aspect of the present invention, since the ball valve is installed on the primary side of the booster water supply device, foreign matter flowing in the pipe on the primary side of the booster water supply device is removed by the ball valve. Can be removed. The other effects are the same as those of the first or second aspect.

According to the fifth aspect of the present invention, since the ball valve is installed in the middle or at the end of the pipe which requires pipe cleaning, foreign matter flowing through the pipe when the pipe is washed can be removed in the middle of the pipe. The part and the end can be removed by the ball valve with a cleaning function with a built-in strainer. Other Claim 1
Or, the same effect as that of 2 is achieved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a ball valve with a built-in strainer and a cleaning function (first position of a three-way valve body) according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the ball valve (a three-way valve body first position).

3A is a diagram illustrating a strainer enlarged and illustrated, and FIG. 3B is a diagram illustrating the strainer viewed from a side.

FIG. 4 is a cross-sectional view of the ball valve (three-way valve body second position).

FIG. 5 is a cross-sectional view of the ball valve (the three-way valve body at a third position).

FIG. 6 is a plan view of the ball valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ball valve with washing function with built-in strainer 10 Valve case 10c Drain port forming body 14 Inlet port 15 Outlet port 16 Drain port 20 Three-way valve body 22 Strainer 30 Operating mechanism

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) F16K 51/00 F16K 51/00 CB F term (reference) 2D060 AB10 AC10 CD09 3H054 AA03 BB25 CA03 CB09 CB34 CC05 CD03 CD14 GG02 3H066 AA06 BA38 3H067 AA24 CC54 DD03 DD12 DD23 EA06 EB24 EC15 ED07 FF11 GG13

Claims (5)

[Claims] A valve case having an inlet, an outlet, and a drain; a ball-shaped three-way valve having a T-shaped internal passage; a strainer attached to one end of the internal passage; An operating mechanism including a valve shaft for rotating the valve body and a handle is provided.In a normal use state, the strainer is arranged so as to approach and face the water outlet, the drain port is closed, and the water inlet is connected to the water outlet. When washing the water distribution pipe connected to the valve case, the water outlet is closed and the water inlet is connected to the drain without passing through the strainer. Ball valve with function. 2. The drain valve according to claim 1, wherein the valve case includes a drain port forming body that forms a drain port and is detachably screwed to the drain case. 2. The ball valve with a built-in strainer according to claim 1, wherein the ball valve has a built-in strainer, and is arranged so as to be close to and opposed to the water inlet and close the water inlet and the drain. 3. The ball valve with a built-in strainer and a cleaning function according to claim 1, wherein the ball valve is provided between the water distribution pipe and the water receiving tank. 4. The ball valve with a built-in strainer and a cleaning function according to claim 1, wherein the ball valve is provided on the primary side of the booster water supply device. 5. The ball valve with a built-in strainer and a cleaning function according to claim 1, wherein the ball valve is provided at an intermediate portion or at an end of a water distribution pipe requiring pipe cleaning.