JP2002224510A - Strainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strainer provided in the pipeline of a liquid circulating apparatus, capable of being extended in its life by a simple structure and preventing foreign matter caught by the strainer from again flowing in the pipeline or flowing to the outside at the time of replacement of the strainer. SOLUTION: The strainer 1 provided in the pipeline of the liquid circulating apparatus is constituted of first and second net bodies 2 and 3 comprising disc parts 2b and 3b having holes and semispherical net parts 2a and 3a protruded from the peripheries of the holes and capable of being inserted in the pipeline. The protruding height of the semispherical net part 3a of the second net body 3 is larger than that of the semispherical net part 2a of the first net body 2 and the meshes of the semispherical net part 2a of the first net body 2 are larger than those of the semispherical net parts 3a of the second net body 3. The first and second net bodies are superposed one upon another so that the semispherical net part 2a of the first net body 2 is housed in the semispherical net part 3a of the second net body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strainer provided in a pipe of a liquid circulation device.

[0002]

2. Description of the Related Art In a liquid circulating apparatus, it is known to provide a strainer in a pipe of the liquid circulating apparatus in order to catch foreign substances such as dust in the circulating liquid. However, the conventional liquid circulating apparatus has a problem in that the foreign matter once captured by the strainer flows out again into the pipeline, or the foreign matter captured by the strainer flows out when the strainer is replaced.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to extend the life of a strainer with a simple structure,
An object of the present invention is to provide a strainer provided in a pipeline of a liquid circulation device, which prevents foreign matters trapped by the strainer from flowing out into the pipeline again or flowing out during replacement of the strainer.

[0004]

According to the present invention, there is provided a strainer provided in a pipe of a liquid circulating apparatus, wherein the strainer is attachable to a joint of the pipe. A first and second mesh body comprising a disc portion having a hole having a size substantially equal to the inner diameter of the conduit, and a hemispherical mesh portion protruding from the periphery of the hole and capable of being inserted into the conduit; The first and second meshes have substantially the same disk portions, and the height of the hemispherical mesh of the second mesh is greater than the height of the hemispherical mesh of the first mesh. The mesh of the hemispherical net portion of the first net is larger than the mesh of the hemispherical net portion of the second net, and the first and second nets are formed of the second net. A hemispherical net portion of the first net is accommodated inside the hemispherical net portion of the body, and an empty space is provided between the two hemispherical net portions. Are superimposed so allow, it is characterized in that. In the strainer according to the present invention, it is appropriate that the first and second meshes are made of metal, and the disc portions of the first and second meshes are joined by welding.

[0005] A strainer according to the present invention is a strainer provided in a pipe of a liquid circulating apparatus, wherein the strainer has a hole which can be attached to a joint of the pipe and has a size substantially equal to the inner diameter of the pipe. A first and a second net comprising a disc portion and a hemispherical net portion protruding from the periphery of the hole and capable of being inserted into the conduit, wherein the first and second nets are formed in a circle. The plate portion has substantially the same shape, and the projection height of the hemispherical net portion of the second net is greater than the projection height of the hemispherical net portion of the first net, and the height of the hemispheric net portion of the first net is Mesh is second
Are larger than the mesh of the hemispherical net portion of the first net, and the first and second nets are located inside the hemispherical net portion of the second net. Since the net-like net portion is housed and overlapped so that a space is formed between the two hemispherical net portions, a large foreign matter is captured by the hemispherical net portion of the first net, and the second net is Smaller foreign objects can be captured by the hemispherical net portion of the body, and the foreign objects captured by the second net are surrounded by the two hemispherical net portions.

Therefore, the strainer according to the present invention is:
Since the large foreign matter is captured by the first mesh and the smaller foreign matter is captured by the second mesh, the life of the strainer can be extended, and the foreign matter captured by the second mesh is 2 mm.
Since the liquid crystal device is surrounded by the two hemispherical net portions, the foreign matter is less likely to flow out into the inflow-side conduit while the liquid circulation device is stopped, and is unlikely to escape from the strainer even when the strainer is replaced. Further, since the first net is also formed as a hemispherical net, it is difficult for foreign matters captured by the first net to escape from the strainer to the outside. Further, the first and second nets are made of metal,
When the disk portions of the first and second nets are joined by welding, the first and second nets are integrated into one strainer, so that the handling becomes easy and the strength is also improved. strong.

[0007]

FIG. 1 is a longitudinal sectional view showing an embodiment of a strainer according to the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, and FIG. FIG. 4 is a cross-sectional view showing an embodiment in a case where it is attached to a joint of a pipeline. The strainer 1 according to the present invention can be attached to a joint of a pipe of a liquid circulation device (see FIG. 3), and has a disk having a hole having a size substantially equal to the inner diameter d of a pipe 11 constituting the pipe. It has first and second nets 2, 3 consisting of portions 2b, 3b and hemispherical net portions 2a, 3a projecting from the perimeter of the hole and insertable into the conduit.

The first and second nets 2, 3 have substantially the same disk portions 2b, 3b, and the hemispherical net portion 3a of the second net 3 has a projection height of the first. The mesh of the hemispherical net portion of the first net 2 is larger than the mesh of the hemispherical net portion 3 of the second net. The first and second nets 2 and 3 have the hemispherical net portion 2a of the first net 2 stored inside the hemispherical net portion 3a of the second net 3 They are overlapped so that a space 4 is formed between the net portions 3a and 2a. The first and second nets 2, 3 are made of stainless steel, and the disc portion 3b of the second net 3 is superimposed on the disc portion 2b of the first net 2, and A stainless steel disk 5 having substantially the same shape as the disk portions 2b and 3b and having a greater thickness than the disk portions 2b and 3b is placed on the disk portion 3b.
Are superimposed, and the disc members 2b, 3b and the disc 5 are integrally joined by spot welding these superposed members.

The reason why the thicker stainless steel plate 5 is further overlapped and integrally joined on the disk portions 2b and 3b is to increase the strength, and the thicker stainless steel plate is used. When 5 is used, the strength can be ensured by the disk 5, so that the first and second nets 2, 3 can be made thin. When the first and second nets 2 and 3 can ensure strength, the stainless steel disk 5 can be omitted. The reason why the first and second nets 2, 3 and the disk 5 are made of stainless steel is that a corrosive liquid may be used as the liquid for the liquid circulation device. If not, it is not necessary to use stainless steel. Although the disk portions 2b, 3b and the disk 5 have substantially the same shape, the outer diameters of these members are exactly the same, and the diameter of the hole of the disk 5 is the same as the diameter of the hole of the disk portion 3b. The diameter of the hole of the disk portion 3b is slightly larger than the diameter of the hole of the disk portion 2b.

In the strainer 1 according to the present invention, as shown in FIG. 3, the disc portions 2b and 3b of the nets 2 and 3 are sandwiched between the joints of the pipes 11 and 12 constituting the conduit of the liquid circulation device. The hemispherical net portions 2a, 3a projecting from the disk portions 2b, 3b are mounted so as to face the flow direction of the liquid flowing through the tubes 11, 12 (the direction of the arrow in FIG. 3). That is, as shown in FIG. 3, the pipes 11 and 12 constituting the pipes of the liquid circulating apparatus have flanges 11a and 12a, annular projections 11b at their ends, and annular recesses for receiving the annular projections 11b. Tubes 11 and 12 are integrally joined by tightening the flanges 11a and 12a with bolts and nuts. At this time, the end walls of the annular projection 11b and the annular recess 12b are formed. The disc portion 2b, 3b integrally joined to the disc 5 of the mesh body 2, 3 is sandwiched between the end wall and a gasket 14 for sealing, so that the strainer 1 according to the present invention is provided. Is mounted in a liquid-tight manner at the junction of the conduits of the liquid circulation device.

An annular groove for mounting an O-ring 15 is provided on the outer peripheral wall of the annular projecting portion 11b.
Reference numeral 12 is liquid-tightly joined. Further, as shown in FIG. 3, the inner diameters of the pipes 11 and 12 constituting the pipes of the liquid circulation device do not necessarily have to be the same, and the disk portions 2b and 3b
Has a diameter substantially equal to the inner diameter d of the tube 11 on the side where the disk portions 2b, 3b are mounted. Strainer 1 according to the present invention
Has the above-described configuration, the hemispherical net portion 2a of the first net 2 can capture a large foreign substance, and the hemispherical net portion 3a of the second net 3 can capture a smaller foreign substance. The foreign matter captured by the second net 3 is surrounded by two hemispherical net portions 2a, 3a.

Therefore, the strainer 1 according to the present invention
Captures a large foreign object with the first mesh 2 and the second mesh 3
In this case, the clogging of the mesh is reduced and the life of the strainer 1 can be prolonged. Since the liquid crystal device is surrounded, it is less likely that the foreign matter flows into the pipeline again while the liquid circulation device is stopped, and it is difficult for the foreign matter to escape from the strainer 1 when the strainer 1 is replaced. In other words, in the conventional strainer, when the liquid circulation device stops, the foreign matter that has pressed the foreign matter against the mesh portion of the strainer disappears, so that the small foreign matter easily floats in the liquid and flows out to the inflow side in the pipeline, In the strainer 1 according to the present invention, since the small foreign matter captured by the second net 3 is surrounded by the two hemispheric nets 2a and 3a, the hemispheric net 2a of the first net 2 is It acts as a check mechanism for foreign matter, so that small foreign matter is less likely to flow back into the pipeline while the liquid circulation device is stopped, and it is difficult for the strainer 1 to escape from the strainer 1 when the strainer 1 is replaced.
In addition, since the first net 2 is also a hemispherical net, it is difficult for large foreign matters caught by the first net 2 to escape from the strainer 1 to the outside. In particular, when the above-described strainer is used in a conduit in which liquid flows downward from above, foreign matter trapped in the first net 2 does not escape. Further, since the first and second nets 2 and 3 are made of metal and the disc portions of the first and second nets 2 and 3 are joined by welding, the first and second nets 2 and 3 are welded. Since the nets 2 and 3 are integrated into one strainer 1, handling becomes easy and strength is high.

The strainer 1 taken out of the pipe of the liquid circulating apparatus flows the washing water from the second mesh body 3 side, so that the hemispherical mesh portions 2a of the first and second mesh bodies 2, 3 are formed. , 3
It is possible to remove the foreign matter trapped by a. That is, the mesh of the hemispherical net portion 2a of the first net 2 is
Is larger than the mesh of the hemispherical net portion 3a of the net member 3, and is in a space surrounded by the foreign matter trapped by the hemispherical net portion 3a of the second net member 3 and the two hemispherical net portions 2a, 3a. Since the foreign matter is smaller than the mesh of the hemispherical net portion 2a of the first net 2, these foreign matters are washed by the washing water supplied from the second net 3 side to the hemispherical net portion 2a of the first net 2. Through the mesh. The strainer 1 from which the foreign matter has been removed in this way is attached to the pipeline of the liquid circulation device again.

In the above-described embodiment, the first and second nets 2 and 3 are made of metal, and the first and second nets 2 and 3 are made of metal.
The first and second nets 2, 3 are integrated by welding the disc portions of the first and second nets 2, 3,
3 need not necessarily be joined by welding and integrated. That is, when attaching the strainer 1 to the pipeline of the liquid circulating apparatus, the first and second nets 2 and 3 are overlapped and the disc portions 2b of the first and second nets 2 and 3 are overlapped. 3
b is the end wall of the annular projection 11b and the annular recess 12b.
May be sandwiched between the end wall of the first member and the second member. At this time, between the disk parts 2b, 3b and / or the disk parts 2b, 3b
b and the end wall of annular projection 11b or annular recess 12b
It is desirable that the strainer 1 be liquid-tightly attached to the joint of the pipeline of the liquid circulating device by sandwiching a gasket between the end wall and the gasket.

[0015]

As described in detail above, according to the present invention, the life of the strainer can be prolonged with a simple structure, and the foreign matter trapped by the strainer flows out into the pipe again, or the external It is possible to provide a strainer provided in a pipeline of the liquid circulation device, which prevents the liquid from flowing out to the liquid circulation device.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a strainer according to the present invention.

FIG. 2 is a view taken in the direction of arrow A in FIG. 1;

FIG. 3 is a cross-sectional view showing an embodiment in which a strainer according to the present invention is attached to a joint of a pipeline of a liquid circulation device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 strainer 2 first net 2a hemispheric net portion of first net 2b disk portion of first net 3 second net 3a hemispheric net portion of second net 3b second Disc portion of the mesh body 11, 12 Pipe forming the conduit of the liquid circulation device

Claims (2)

[Claims] 1. A strainer provided in a pipe of a liquid circulating apparatus, wherein the strainer has a disc portion having a hole attachable to a joint of the pipe and having a size substantially equal to the inner diameter of the pipe; The first and second nets comprise hemispherical net portions projecting from the periphery of the hole and insertable into the conduit, and the first and second nets have substantially the same disk portions. In the shape, the projecting height of the hemispherical net portion of the second net is greater than the projecting height of the hemispherical net portion of the first net, and the mesh of the hemispherical net portion of the first net is the second net. The mesh is larger than the mesh of the hemispherical net portion of the net, and the first and second nets are hemispherical of the first net inside the hemispherical net of the second net. The net part is stored
A strainer which is overlapped so that a space is formed between two hemispherical mesh portions. 2. The first and second nets are made of metal,
The strainer according to claim 1, wherein the disk portions of the first and second nets are joined by welding.