JPH10296014A - Strainer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strainer which is capable of preventing a suction pump from being marred and replacing a housing rapidly and simply. SOLUTION: This strainer 1 is submerged into a water source such as a river or a lake/swamp and is of such a double structure that a small pebble and sludge are prevented from infiltrating by filter holes 4d, 4d perforated in housing 4, 5 and filtrate is obtained in the housings 4, 5. In addition, the outer housing 5 is set with the inner housing 4 with nuts 6 and bolts 7 in a freely detachable manner, and at the same time, the diameter of the filter holes 5d opened in the outer housing 5 is larger than the diameter of the filter hoses 4d in the inner housing 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention is used in the fields of agriculture, construction industry, pavement industry, etc., and is applied to water tanks mounted on traveling vehicles and stationary water tanks from water sources such as rivers and lakes. The present invention relates to a filter (hereinafter, referred to as a strainer) of a type that is attached to the tip of a water-absorbing hose and is introduced into a water source when taking in water.

[0002]

2. Description of the Related Art FIG.
Shown in In FIG. 3, reference numeral 51 denotes a traveling vehicle, and a water absorption hose 53 is drawn out of a water storage tank 52 mounted thereon. A strainer 54 is attached to the tip of the water-absorbing hose 53 in order to prevent intrusion of small gravel, sludge lump (hereinafter referred to as sludge) or dust. In the middle of the path of the water absorption hose 53, a water absorption pump 55 (a spiral blade type, a screw shaft type, or the like) is provided. Then, the water suction hose 53 is thrown into a water source W such as a river or a lake, and the pump 55 is operated to draw up the filtered water from the water source W to the water storage tank 52.

FIG. 4 shows an example of the structure of a conventional strainer. The strainer 54 has a cylindrical housing 54 a having a top and a bottom, and a connecting pipe 5 for connecting the water absorbing hose 53.
4b, and the connecting pipe 54b is fixed through the upper lid of the housing 54a so that one end of the connecting pipe 54b is located in the center of the inside of the housing 54a. On the other hand, on the peripheral surface of the housing 54a, a plurality of filter holes 54c for filtering water by preventing small pebbles and sludge in the water source W from entering are provided.

[0004]

During the water absorbing operation, the water absorbing hose 53 is thrown into the water source W as described above. However, rivers and lakes serving as water sources have rocky places and shallow places.
When the is thrown, the strainer 54 collides violently with rocks and the water bottom, and the impact may deform or break the housing 54a. If the filter hole 54c is distorted due to the deformation of the housing 54a, the water absorption efficiency is reduced, and if the housing 54a is broken, pebbles or sludge of a predetermined size or more are sucked, and the internal components of the pump 55 To shorten the pump life remarkably. In addition, as shown in FIG.
A very troublesome operation of attaching and detaching the connecting pipe 54b to and from the hose band 56 and attaching and detaching the hose band 56 was required.

[0005] To cope with these problems, as a protective basket, a means of covering the entire strainer 54 with a rattan basket to prevent damage to the housing 54a has been adopted. However, the rattan basket is highly corroded and weathered. There was a problem that the replacement time had to be early, resulting in uneconomical results.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and a strainer capable of preventing damage to a water suction pump and allowing quick and easy replacement of a housing. It is intended to provide.

[0007]

The present invention uses the following means to achieve the above object. In a strainer that is put into a water source such as a river or a lake and is provided with a plurality of filter holes formed in the housing to prevent intrusion of small gravel or sludge and obtain filtered water inside the housing, the housing has a double structure. The outer housing is configured to be detachable from the inner housing,
The diameter of the filter hole in the outer housing is larger than the diameter of the filter hole in the inner housing.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a strainer according to the present invention will be described in detail with reference to FIGS. FIG. 1 is an external view of a strainer according to the present invention. FIG. 1A is a side view, and FIG. 1B is a bottom view.
FIG. 2 is an exploded perspective view of the strainer.

1 and 2, reference numeral 1 denotes a strainer, which is made of stainless steel, synthetic resin, or the like.
It is composed of a connecting pipe 2 and a housing 3. The connecting pipe 2 is a pipe member for connecting a hose for water absorption or the like, and is attached so as to penetrate the housing 3 so that one end side of the connecting pipe 2 is located in the center of the inside of the housing 3. The housing 3 has a double structure including an inner housing 4 as an inner housing and an outer housing 5 as an outer housing.

The inner housing 4 and the outer housing 5 each have a cylindrical shape and are arranged concentrically with respect to the axis of the connecting pipe 2. In the present embodiment, the inner housing 4 is constituted by a cylindrical portion 4a, an upper lid 4b, and a lower lid 4c.
The outer housing 5 includes a cylindrical portion 5a, an upper lid 5b, and a lower lid 5c. The upper housing 4b of the inner housing 4 is fixed to the lower surface of the upper lid 5b of the outer housing 5 by welding or the like. . The outer housing 5 is configured to be detachable from the inner housing 4, and in the present embodiment, hexagon bolts are used as the means. First, the lower cover 4c of the inner housing 4 has
Holes 4e for bolt penetration are formed in several places, and nuts 6 are fixed to the lower lid 4c in accordance with the holes 4e. On the other hand, the lower lid 5c is also provided on the lower lid 5c of the outer housing 5.
A hole 5e for bolt penetration is formed in accordance with the position of the hole 4e formed in c. With the above configuration, the outer housing 5 is made detachable from the inner housing 4 by screwing or removing the bolt 7 from the nut 6. Reference numeral 8 denotes a spring washer, and reference numeral 9 denotes a flat washer.

The cylindrical portion 4a of the inner housing 4 and the cylindrical portion 5a of the outer housing 5 are each prevented from entering small gravel, sludge, etc. over the entire peripheral surface, so that filtered water is introduced into the inner housing 4. Filter holes 4d and 5d for obtaining the filter holes are provided.
The hole has a larger diameter than d. In addition, filter hole 4
d and each pitch of the filter holes 5d are appropriately dimensioned.

Next, the operation of the strainer 1 will be described with reference to a usage example shown in FIG. A water-absorbing hose 53 having a strainer 1 attached to a tip thereof is introduced into a water source W such as a river or a lake, and a water-absorbing pump 55 is operated to start water absorption. At this time, the strainer 1 is located underwater or at the bottom of the water. When it is located in water, water is separated and filtered from suspended matter such as sludge and dust. First, the filter holes 5d formed in the outer housing 5 prevent relatively large sludge and dust from entering, and the filter holes 4d formed in the inner housing 4 prevent small sludge and dust from entering. Intrusion is prevented. The filtered water thus obtained inside the inner housing 4 is stored in the water storage tank 52 from the connection pipe 2 through the water absorption hose 53. When the strainer 1 reaches the bottom of the water, in addition to the above-described sludge and dust, small gravel and the like are prevented from entering by the filter holes 5d and 4d.

Since the housing of the strainer 1 has a double structure, when the water-absorbing hose 53 is thrown into a water source, the strainer 1 collides with rocks or stones at the water edge or the bottom, and the outer housing 5 is damaged by the impact. Even the inner housing 4
Performs a predetermined filtering function without being affected by collision. That is, the filter hole 4 formed in the cylindrical portion 4a
By d, the intrusion of small gravel, sludge, and the like having a predetermined size or more can be prevented, and the pump 55 can be prevented from being damaged. Further, even when the housing 5 is severely deformed and needs to be replaced, the outer housing 5 is configured to be detachable, so that in the replacement work of the strainer having the conventional single housing structure, Compared to the operation of attaching and detaching the connecting pipe to the water-absorbing hose and the operation of attaching and detaching the hose band, the parts can be replaced quickly and easily. If a hexagonal bolt is used as the attaching / detaching means of the outer housing, the replacement workability is further improved.

Further, since the outer housing 5 is made of a material having excellent strength such as stainless steel and synthetic resin, the degree of damage such as deformation is smaller than that of a rattan basket used over a conventional strainer. Further, there is an advantage that there is almost no deterioration due to corrosion and weathering, and the durability is excellent.

Further, a filter hole 5 of the outer housing 5 is provided.
Since the hole diameter of the filter hole d is larger than the hole diameter of the filter hole 4d of the inner housing 4, it is possible to prevent small gravel, sludge, and the like from entering in a stepwise manner, so that efficient water can be prevented. Can be filtered. Small gravel, sludge, and the like accumulated in the space surrounded by the outer housing 5 and the inner housing 4 can be easily removed by periodically removing the outer housing 5.

The preferred embodiment of the strainer according to the present invention has been described above. The main feature of the present invention is that the housing has a double structure, and the outer housing is attached to and detached from the inner housing. The present invention is not limited to the above-described embodiment, but may be variously modified by appropriately changing the shape and mounting position of each component without departing from the gist of the present invention. Becomes possible.

[0017]

The strainer according to the present invention has the following effects. (1) By making the housing a double structure, even if the outer housing is damaged by colliding with a rock or a water bottom, the inner housing is not damaged. It can perform a filtering function, and can prevent damage to the water absorption pump due to small gravel or the like. In addition, since the outer housing is configured to be detachable, it is quicker and easier to replace the strainer with the conventional unitary housing structure than to attach and detach the connecting pipe to the water-absorbing hose and to attach and detach the hose band. Parts can be easily replaced. If a hexagon bolt is used as the attachment / detachment means, the replacement workability is further improved. (2) Since the outer housing is made of a material having excellent strength such as stainless steel and synthetic resin, the degree of damage such as deformation is smaller than that of a rattan basket, and there is almost no deterioration due to corrosion or weathering. , The replacement frequency is reduced.

[Brief description of the drawings]

1 is an external view of a strainer according to the present invention, FIG. 1 (a) is a side view, and FIG. 1 (b) is a bottom view.

FIG. 2 is an exploded perspective view of a strainer.

FIG. 3 is an explanatory diagram showing an example of use of a strainer.

FIG. 4 is an explanatory view showing one structural example of a conventional strainer.

[Description of Signs] 1 Strainer 2 Joint pipe 3 Housing 4 Inner housing 4a Tubular part 4b Upper lid 4c Lower lid 4d Filter hole 5 Outer housing 5a Tubular part 5b Upper lid 5c Lower lid 5d Filter hole 6 Nut 7 Bolt 8 Spring washer 9 Flat washer

Claims (1)

[Claims] 1. A strainer which is put into a water source such as a river or a lake and has a plurality of filter holes formed in a housing to prevent small gravel or sludge from entering and obtain filtered water inside the housing. And the outer housing is configured to be detachable from the inner housing, and the diameter of the filter hole of the outer housing is larger than the diameter of the filter hole of the inner housing. A strainer characterized by: