JPH09280418A - Strainer with built-in valve member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strainer with a built-in a valve member capable of back washing a filtering part. SOLUTION: An inflow passage selector valve 5 is rotatably arranged in an inflow passage 2. A port 7 can be connected to an outflow passage selector valve 6 and a filtering part 3 through a bypass passage 22 or can be directly connected to the filtering part 3. An outflow passage selector valve 6 is rotatably arranged in an outflow passage 4. The bypass passage 22 and the filtering passage 3 can be connected to each other by closing an outlet 27 by the turning movement of the outflow passage selector valve 6, or the filtering part 3 and the outlet 27 can be connected to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strainer for removing foreign matter such as dust and rust contained in a fluid or a scale by filtering with a filter or the like.

[0002]

2. Description of the Related Art As a conventional valve member built-in strainer, for example, there is one disclosed in Japanese Patent Laid-Open No. 7-303808. This is a strainer consisting of an inflow passage, a blow passage, and an outflow passage, in which valve members are rotatably arranged in the blow passage and the outflow passage, respectively.
In addition to being able to reduce the amount of dust, by rotating the valve member of the blow passage, it is possible to perform so-called blow work for removing foreign matter accumulated in the screen portion.

[0003]

SUMMARY OF THE INVENTION In the above prior art,
There is a problem that it is possible to blow from the inflow passage side to the blow passage side, but not to blow from the outflow passage side to the blow passage side. In the strainer's filter section, foreign matter in the flow from the inflow path to the outflow path is filtered.To remove this foreign matter and prevent clogging of the filter section, reverse the flow direction. It is effective to carry out so-called backwashing.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a strainer with a built-in valve member capable of preventing the clogging by backwashing the filtering portion.

[0005]

[Means for Solving the Problems] A means for solving the above-mentioned problems is a storage device provided with an inflow passage, a filtering portion and an outflow passage.
In the inlet, the inflow passage and the outflow passage are rotatably arranged, and the inflow passage and the outflow passage are connected by a bypass passage to connect the inflow passage switching valve member. Can switch to at least the bypass passage and the filtration section, and the outflow passage switching valve member can switch between the communication between the bypass passage and the filtration section and the communication between the filtration section and the outlet, and the inflow passage switching valve member can bypass. A communication hole is formed to connect the filtration unit and the outside of the system when the passage is switched to the passage.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION By rotating an inflow passage switching valve member to switch to a filtering portion and by rotating an outflow passage switching valve member to switch communication between a filtering portion and an outlet, an inflow passage, a filtering portion and an outflow portion are formed. The passage and the outlet are communicated, foreign matter in the fluid from the inflow passage is removed by the filtration unit, and only the fluid from which the foreign matter has been removed flows down from the outflow passage and the outlet to a predetermined location. Perform a function.

By rotating the inflow passage switching valve member to switch to the bypass passage, and rotating the outflow passage switching valve member to switch communication between the bypass passage and the filtering portion, the inflow passage and the outflow passage are passed through the bypass passage. The foreign matter accumulated in the filtering section due to the communication between the passage and the filtering section is backwashed, and the backwashed foreign matter is discharged to the outside through a communication hole communicating between the filtering section and the outside of the system.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, an inflow passage 2, a filtering portion 3, an outflow passage 4, and an inflow passage switching valve 5 and an outflow passage switching valve 6 formed in a main body 1 form a valve member built-in strainer. .

In the inflow passage 2, four fluid inlets / outlets 7, 8, 9,
10 and a spherical valve chamber 11 is formed inside, and one partition plate 12 and two on-off valves 1 are formed inside the valve chamber 11.
An inflow passage switching valve 5 composed of 3 and 14 is rotatably arranged. Each of the fluid inlets / outlets 7, 8, 9, 10 is a cylindrical passage, and the inlet / outlet 7 is connected to a fluid source (not shown), and the inlet / outlet 8
Is connected to the bypass passage 22, the inlet / outlet port 9 is connected to the filtering section 3, and the inlet / outlet port 10 forms a communication hole communicating with the outside of the system.
Ring-shaped valve seats 15 and 16 are attached to the inner ends of the fluid inlets and outlets 8 and 10, respectively. The valve seats 15 and 16 are made of a material suitable for shutting off fluid such as synthetic rubber or synthetic resin. The ends of the on-off valves 13 and 14 are formed in a spherical shape so as to cooperate with the valve seats 15 and 16 to cut off the fluid communication to the inlets and outlets 8 and 9. The on-off valves 13 and 14 are support rods 17 and 1, respectively.
It is connected to the rotary shaft 19 via 8.

The center of the disk-shaped partition plate 12 is connected to the rotary shaft 19 at right angles to the on-off valves 13 and 14. Doorway 7,
The valve chamber 11 is arranged so as to abut on the outer periphery of the partition plate 12 at a position rotated by 45 degrees from the central axis of each of 8, 9, and 10.
Two partition valve seats 20 and 21 are attached along the inner circumference of the. The partition valve seats 20 and 21 are also made of a material such as synthetic rubber or synthetic resin.

The filtering section 3 is formed by a cylindrical filter 23 having a large number of pores, and the fluid flowing down from the inlet / outlet 9 is passed over the foreign matter at the inner peripheral portion of the filter 23 to remove the foreign matter. The lost fluid reaches the outflow passage 4 from the outer peripheral space 24 of the filter 23.

The outflow passage 4 is formed by a three-way ball valve having a spherical outflow passage switching valve 6 having a T port, the inlet / outlet port 25 is connected to the filter section 3, and the inlet / outlet port 26 is connected to the bypass passage 2
2, and the inlet / outlet port 27 forms an outlet which is connected to a predetermined fluid use place (not shown).

The state shown in FIG. 1 shows a state in which the valve chamber 11 is partitioned by the partition plate 12 into an upper left chamber and a lower right chamber. The valve chamber 11 is partitioned by the partition plate 12, the inlets and outlets 7 and 8 and the inlets and outlets 9 and 10 are in communication with each other, the inflow passage switching valve 5 communicates with the outlet 7 and the bypass passage 22 and the outflow passage switching valve 6 is connected with the bypass passage. 22 communicates with the filtering unit 3 and the communication hole 10. Therefore, the filter of the filtering unit 3
Foreign matters such as dust accumulated on the inner periphery of 23 are backwashed and removed from the communication hole 10 to the outside of the system.

From the state shown in FIG.
The outflow passage switching valve 6 also turns 9 while turning clockwise by 5 degrees.
By turning 0 degrees counterclockwise, the opening / closing valves 13 and 14 of the inflow passage switching valve 5 close the inlets / outlets 8 and 10, and the inlets / outlets 7 and 9 communicate with each other, whereby the fluid from the inlet / outlet 7 is filtered. The fluid that has reached the inside of the filter 23 of No. 3 and the foreign matter has been removed reaches the predetermined fluid use location from the outlet 27 of the outflow passage switching valve 6, and functions as a normal strainer.

Further, when the inflow passage switching valve 5 is rotated 90 degrees counterclockwise from the state shown in FIG.
Since 0 is communicated and the inlets / outlets 7 and 8 and 9 are not communicated with each other, the fluid from the inlet / outlet 7 does not reach the filtering portion 3 and the outflow passage 4 but is directly communicated from the communication hole 10 which is an inlet / outlet to the outside of the system. As a result, the foreign matter between the fluid source (not shown) connected to the inlet / outlet 7 and the inflow passage 2 can be directly excluded from the system.

[0016]

According to the strainer with a built-in valve member of the present invention,
By backwashing the filtering portion via the bypass passage, the foreign matter accumulated in the filtering portion can be surely removed.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a strainer with a built-in valve member of the present invention.

[Explanation of symbols]

 1 main body 2 inflow path 3 filtering section 4 outflow path 5 inflow path switching valve 6 outflow path switching valve 10 communication hole 12 partition plate 13, 14 on-off valve 22 bypass path 23 filter-27 outlet

Claims (1)

[Claims] 1. In a strainer having an inflow path, a filtering section, and an outflow path, a flow path switching valve member is rotatably arranged in the inflow path and the outflow path, and the flow path of the inflow path and the outflow path is provided. By connecting between the switching valve members by a bypass passage, at least the bypass passage and the filtering portion can be switched by the inflow passage switching valve member,
The outflow passage switching valve member can switch between communication between the bypass passage and the filtering portion and communication between the filtration portion and the outlet, and when the inflow passage switching valve member is switched to the bypass passage, the filtration portion and the outside of the system can be connected. A strainer with a built-in valve member, which has a communication hole formed therein.