JPH09303613A - Strainer having valve member built therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve member incorporating type strainer capable of sucking foreign matters from a filter part into the inflow path side. SOLUTION: A three-way change-over valve body 10 is disposed pivotably in an inflow path 2. The three-way change-over valve body is formed in the inside with a nozzle part 6. A flow path 7 can be connected to a flow path 9 through the nozzle part 6 by pivoting of the three-way change-over valve body 10 or the flow path 7 can be connected to the flow path 8 through the inverted nozzle part 6. A suction force in the nozzle part 6 can suck foreign matters in a filter 11 to remove them from the flow path 9 outside the system.

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 conventional one,
Although it is possible to blow from the inflow passage side to the blow passage side, there is a problem that foreign matter cannot be sucked into the inflow passage side. In the filtering section of the strainer, 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 filtering section, it is necessary to move to the inflow path side. It is effective to suck the foreign matter to the side opposite to the flow of normal filtration.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to obtain a strainer with a built-in valve member capable of sucking the foreign matter in the filter section toward the inflow path and preventing clogging of the filter section.

[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 first embodiment, a three-way switching valve member having three flow paths in the inflow path is rotatably arranged so that the first flow path serves as a fluid inlet and the second flow path connects to the filtering section. The three-way switching valve member is formed with a nozzle portion that narrows the flow path while communicating the flow path with the outside of the system.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION By rotating a three-way switching valve member arranged in an inflow path to connect a fluid inlet and a filter, foreign matter in the fluid from the fluid inlet is removed by the filter. As a result, only the fluid from which foreign substances have been removed flows down from the outflow passage to a predetermined location, and functions as a normal strainer.

By rotating the three-way switching valve member and connecting the third flow path communicating with the fluid inlet port to the outside of the system via the nozzle portion, the fluid from the fluid inlet port is throttled at the nozzle portion. The static pressure is reduced and the suction force is generated. The suction force generated in this nozzle portion reaches the filtering portion via the second flow path,
The foreign matter collected in the filter is sucked, and the sucked foreign matter is discharged from the system through the third flow path together with the fluid in the nozzle.

[0008]

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

Three flow paths 7, 8 and 9 are formed in the inflow path 2, and a spherical three-way switching valve element 10 having a T-shaped path corresponding to each flow path 7, 8 and 9 is rotatable. To place.
Each of the flow paths 7, 8 and 9 is a cylindrical flow path, the first flow path 7 is connected to a fluid source (not shown) to serve as a fluid inlet, and the second flow path 8 is connected to the filtration unit 3. The third flow path 9 communicates with the outside of the system.

The nozzle portion 6 arranged in the T-shaped passage of the three-way switching valve body 10 is bent from the first flow passage 7 to the third flow passage 9 at a substantially right angle and is formed of a tapered cylindrical member. .
The fluid flows down from the first flow path 7 to the nozzle portion 6, and a suction force is generated around the nozzle portion 6 to suck the foreign matter in the filtering portion 3.

The filtering unit 3 is formed of a cylindrical filter 11 having a large number of fine pores, and the fluid flowing down from the flow path 8 is passed over the foreign matters at the inner peripheral portion of the filter 11 to cause the foreign matters. The fluid, which has disappeared, reaches the outflow passage 4 side from the outer peripheral space 12 of the filter 11.

In this embodiment, the ball valve 13 is arranged in the outflow passage 4. The ball valve 13 has a through passage 14
With a spherical ball valve body 15 having a flow path, the flow path 16 is connected to the filter section 3, and the flow path 17 forms an outlet which is connected to a predetermined fluid use place (not shown). Ball valve 1 shown in FIG.
3 shows a state in which the flow path 16 and the outlet 17 are blocked.

In the state shown in FIG. 1, the T-shaped passages of the three-way switching valve body 10 of the inflow passage 2 are at positions facing the three flow passages 7, 8 and 9, respectively, and the fluid from the flow passage 7 is a nozzle. It is throttled at 6 to increase its flow rate and generate a suction force to reach the outside of the system from the flow path 9. Therefore, foreign matters such as dust accumulated on the inner circumference of the filter 11 of the filter unit 3 are also sucked around the nozzle unit 6 and eliminated from the flow path 9 to the outside of the system.

From the state shown in FIG. 1, the three-way switching valve body 10 is rotated 180 degrees clockwise or counterclockwise, and the ball valve body 15 of the outflow passage 4 is rotated 90 degrees clockwise or counterclockwise. By rotating in the direction, the flow paths 7 and 8
Are communicated with each other through the nozzle portion 6 in the opposite direction, and the flow passage 9 is closed so that the fluid from the flow passage 7 reaches the inside of the filter 11 of the filtration portion 3 and the fluid from which foreign matter has been removed is the ball valve. From the outlet 17 of the body 15 to a predetermined fluid use location, it functions as a normal strainer.

In this embodiment, an example in which the ball valve 13 is provided on the outflow passage 4 side has been shown, but if the nozzle portion 6 can generate a sufficient suction force, this ball valve 13 is not always necessary. It is not necessary.

[0016]

According to the strainer with a built-in valve member of the present invention,
The nozzle part of the three-way switching valve member arranged in the inflow path can suck the foreign matter in the filtering part toward the inflow path side, and can reliably remove the foreign matter accumulated in the filtering part to the outside of the system.

[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 filtration section 4 outflow path 6 nozzle section 7, 8, 9 flow path 10 three-way switching valve body 11 filter-15 ball valve body 17 outlet

Claims (1)

[Claims] 1. A strainer having an inflow path, a filtering section, and an outflow path, wherein a three-way switching valve member having a three-way flow path in the inflow path is rotatably arranged so that the first flow path is a fluid. An inlet, a second flow path is connected to the filtration section, a third flow path is connected to the outside of the system, and a nozzle section for narrowing the flow path is formed inside the three-way switching valve member. A strainer with a built-in valve member.