JP2016146773A - Water pipe structure of filtration device - Google Patents

Abstract

PURPOSE: To suppress easy contraction/expansion of a water pipe by enhancing friction holding power of an upper water pipe with respect to a lower water pipe, only with circumferential rotation of the upper water pipe with respect to the lower water pipe, in the water pipe connected with a discharge port of a filtration device and having a constitution being vertically engaged in a slide-adjustable manner.CONSTITUTION: A lower water pipe 17 and an upper water pipe 18, formed in a cylinder shape, include vertical slide engaging portions having the same elliptical cross sections.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a water pipe structure connected to a spout of a filtration device provided in an aquarium for breeding ornamental fish such as goldfish, tropical fish, and saltwater fish.

  Conventionally, in a filtration device provided in a water tank, a shower pipe (water discharge pipe) connected to the upper end of this water supply pipe can be expanded and contracted to discharge water after filtration and connected to the water outlet of the filtration main body. It is publicly known that the vertical position can be adjusted (see, for example, Patent Document 1 below).

Japanese Patent No. 4163663

  By the way, the water pipe of a conventional filtration device is generally formed in a cylindrical shape with a perfect cross section by extrusion molding or the like, and an upper water pipe having a slightly larger diameter is slidably fitted to the upper end of the lower water pipe. It is configured to be able to expand and contract, but the friction holding force of the sliding fitting part is not sufficient, the relative position in the vertical direction of the upper water supply pipe and the lower water supply pipe is difficult to determine, the flow of water in the water tank and There is a problem that the water pipe expands and contracts against the intention due to external force acting on the water pipe.

  The present invention has been made in view of such circumstances, and by simply rotating the upper water pipe in the circumferential direction with respect to the lower water pipe, the friction holding force of the upper water pipe with respect to the lower water pipe is increased to increase the friction of the water pipe. An object is to provide a novel water pipe structure that can prevent expansion and contraction.

In order to achieve the object, the invention described in claim 1 is a water pipe structure connected to a water outlet of a filtration device provided in a water tank,
The water pipe is composed of a lower water pipe connected to the water outlet, and an upper water pipe that is slidably fitted in an upper part of the lower water pipe so that the lower water pipe and the upper water pipe are Rotating them relative to each other in the circumferential direction prevents their sliding.

  In order to achieve the object, the invention described in claim 2 is the one described in claim 1, wherein the lower water supply pipe and the upper water supply pipe are crossed at least in the vertical direction. It is characterized by being formed into a surface ellipse.

  In order to achieve the object, the invention described in claim 3 is the one described in claim 1 or 2, wherein the filtration device is a bottom filtration device, and is a filtration frame laid on the bottom surface of the water tank. The lower water supply pipe is connected to a water outlet for discharging filtered water.

  In order to achieve the object, the invention described in claim 4 is the one described in claim 1 or 2, wherein the filtration device is an internal filtration device, and filtration of a filtration case provided in a water tank. The lower water pipe is connected to a water outlet for discharging the finished water.

  According to the invention described in each claim, the lower water supply pipe of the water supply pipe and the upper water supply pipe are rotated relative to each other in the circumferential direction so that the friction of the sliding fitting portions thereof. The holding force can be increased, and the unusual relative sliding between the lower water pipe and the upper water pipe can be suppressed.

  According to the second aspect of the present invention, the lower water supply pipe and the upper water supply pipe are formed with an oval cross section at least in the vertical direction, so that they can be easily formed by extrusion or the like. Can be easily formed.

The perspective view of a bottom face filtration device provided with the present invention water pipe structure (the 1st embodiment) Sectional drawing which follows the 2-2 line of FIG. 1 (1st Embodiment). FIG. 2 is a view taken along arrow 3 (first embodiment). FIG. 2 is an enlarged sectional view taken along line 4-4 (first embodiment). Sectional drawing of 2nd Embodiment of an internal type filtration apparatus provided with this invention water pipe structure Sectional drawing which follows the 6-6 line of FIG. 5 (2nd Embodiment). Sectional drawing which follows the 7-7 line of FIG. 5 (2nd Embodiment).

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the accompanying drawings 1 to 4.

  This 1st Embodiment is a case where this invention water pipe structure is implemented in a bottom part filtration apparatus.

  As shown in FIGS. 1 to 3, the bottom filtration device includes, as usual, a filtration frame 10 fixed to the bottom surface in the water tank V by a suction cup 11, and gravel as a filter medium laid on the filtration frame 10. 12. The filtration frame 10 is flat in the lateral direction and has a quadrangular shape in plan view, and a flowing water chamber 13 is formed between the bottom surface of the water tank V. A large number of small suction holes 14 are formed in the upper surface of the filtration frame 10 so as to communicate the flowing water chamber 13 to the outside (in the water tank V). The suction small holes 14 are circular small holes and groove small holes that prevent gravel 12 laid on the filtration frame 10 from entering.

A water outlet is opened at one corner of the filtration frame 10, and a short water conduit 15 communicating with the water flow chamber 13 is erected integrally with the water outlet. The water guide pipe 15, the small diameter of the connecting pipe 15 ₂ is integrally formed than via a step portion 15 ₁ thereon. The connecting pipe 15 _{and second} water conduit 15, water pipes 16 according to the present invention is connected freely tuning slide.

  Next, the structure of the water supply pipe 16 will be described with reference to FIGS.

Water pipe 16 is formed into a cylindrical shape by extrusion molding of a synthetic resin material of a transparent rigid, and the lower water pipe 17 connected tuning slide freely in the connecting pipe 15 ₂ of the water conduit 15, the lower water pipe 17 And an upper water pipe 18 that is slightly smaller in diameter than that and is slidably fitted in the vertical direction. The lower water supply pipe 17 and the upper water supply pipe 18 are both formed in an elliptical shape with the same cross section (the ratio of the major axis to the minor axis is the same) and a small difference between the major axis and the minor axis. When the upper water pipe 18 is slidably fitted to the lower water pipe 17, the sliding fitting portions are
As shown in FIG. 4A, the short diameter 17s of the lower water supply pipe 17 and the short diameter 18s of the upper water supply pipe 18 (the long diameter 17l of the lower water supply pipe 17 and the long diameter 18l of the upper water supply pipe 18) are arranged in the circumferential direction. If matched in the radial direction, the inner peripheral surface of the lower water supply pipe 17 and the outer peripheral surface of the upper water supply pipe 18 are fitted over the entire circumference thereof and slide between the lower water supply pipe 17 and the upper water supply pipe 18. Can be expanded and contracted as possible.

  Further, as shown in FIG. 4B, the upper water supply pipe 18 is rotated by about 90 ° in the circumferential direction (radial direction) with respect to the lower water supply pipe 17, and the short diameter 17s of the lower water supply pipe 17 and the upper water supply pipe are rotated. If the major axis 18l of the water pipe 18 (the major axis 17l of the lower water pipe 17 and the minor axis 18s of the upper water pipe 18) are substantially matched in the circumferential direction, the inner peripheral surface of the minor pipe 17s of the lower water pipe 17 and the upper pipe The outer peripheral surface of the long diameter 181 of the water pipe 18 is in close contact with each other, the friction holding force therebetween is increased, and the upper and lower water pipes 18 are prevented from sliding up and down with respect to the lower water pipe 17.

  A slight gap c is formed between the inner peripheral surface of the major axis 17l of the lower water pipe 17 and the outer peripheral surface of the minor axis 18s of the upper water pipe 18, but this gap c is slight. And since the sliding fitting part of the lower water pipe 17 and the upper water pipe 18 exists in water, water does not flow into the said clearance gap c.

  As shown in FIG. 2, an elbow-shaped water discharge pipe 20 is connected to the upper end of the water supply pipe 16, and this water discharge pipe 20 is made to substantially coincide with the water level in the water tank V by adjusting the expansion and contraction of the water supply pipe 16. The An air pipe 21 that passes through the water discharge pipe 20 and is connected to the air pump P is inserted into the water supply pipe 16, and an air stone 22 is connected to the lower end of the air pipe 21.

  Pressurized air generated by the operation of the air pump P is supplied to the air stone 22 through the air pipe 21, and is bubbled from the air stone 22 into the water supply pipe 16. Absorbs water.

  Next, the operation of the first embodiment will be described.

  According to the operation of the air pump P, a water absorption force is generated in the water supply pipe 16, and the water in the water tank V passes through the gravel 12 functioning as a filter medium and is filtered and purified. And flows into the water absorption chamber 13 and flows into the water supply pipe 16 through the water conduit 15 from the water outlet. The filtered water in the water supply pipe 16 rises and is discharged into the water tank V from the water discharge pipe 20. The purified water discharged from the water discharge pipe 20 flows along the water surface level in the water tank V and makes it easy to mix air into the water in the water tank V.

  By the way, the length adjustment of the water pipe 16 and the holding of the predetermined length can be performed by rotating the upper water pipe 18 with respect to the lower water pipe 17 in the range of about 90 ° in the circumferential direction, as described above. It can be done easily.

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  This second embodiment is a case where it is carried out in a conventionally known internal type filtration device [commonly known as a water harvesting Eight (trade name), for example, see Japanese Patent No. 4163663], and is installed on the floor surface of the water tank V. At the center of the upper part of the octagonal tubular filtration case 30 of the internal filtration device, a water guide pipe 31 communicating with the water outlet of the filtration case 30 is projected. The water guide pipe 31 has an octagonal cross section and is slightly tapered upward. A water supply pipe 16 having the same structure as that of the first embodiment is connected to the water guide pipe 31 through a joint 32 made of an elastic synthetic resin material. Communication connection. The lower pipe of the lower water pipe 17 is detachably connected to the water conduit 31, and the lower part of the upper water pipe 18 is slidably fitted to the upper part of the lower water pipe 17, and is connected to the upper end of the upper water pipe 18. A water discharge pipe 33 is connected.

  Similar to the first embodiment, the upper water pipe 18 is rotated and adjusted with respect to the lower water pipe 17 in the range of approximately 90 ° in the circumferential direction, so that the upper water pipe 18 can move in the vertical direction with respect to the lower water pipe 17. Due to the position adjustment by sliding and the high frictional holding force, the water pipe 16 is prevented from sliding in the vertical direction.

  An air pump P is connected to the suction port 34 of the filtration case 30 via an air pipe 35. By supplying pressurized air into the filtration case 30 by the operation of the air pump P, the water in the water tank V is filtered. After being sucked into 30 and filtered by a filter medium (not shown) in the filter case 30, the water flows from the water guide pipe 31 to the water supply pipe 16, and is discharged into the water tank V through the water discharge pipe 33.

  As described above, as shown in the first and second embodiments, the water supply pipe 16 formed by slidingly fitting the lower water supply pipe 17 and the upper water supply pipe 18 so as to expand and contract includes the upper water supply pipe 18 and the lower water supply pipe 17. On the other hand, by slightly adjusting the rotation (approximately 90 °) in the circumferential direction, it is possible to increase the frictional holding force between them and to suppress their sloppy axial sliding.

  Although the first and second embodiments have been described above, the present invention is not limited to these embodiments, and various other embodiments are possible within the scope of the present invention.

  For example, in the above-described embodiment, the case where the cross-sectional shapes of the lower water supply pipe and the upper water supply pipe formed in a cylindrical shape are formed in the same elliptical shape is described, but the lower water supply pipe and the upper water supply pipe are relative to each other. In particular, it is only necessary to prevent the sliding in the axial direction by pivoting in the circumferential direction, and the cross-sectional shape thereof may be formed in another shape such as the same polygonal shape.

10. Filtration frame 16 ... Water pipe 17 ... Lower water pipe 18 ... Upper water pipe 30 ... Filtration case V ... Water tank

Claims (4)

A water pipe structure connected to a water outlet of a filtration device provided in the water tank (V),
The water supply pipe (16) includes a lower water supply pipe (17) connected to the water outlet, and an upper water supply pipe (18) fitted to the upper portion of the lower water supply pipe (17) so as to be slidable in the vertical direction. The lower water pipe (17) and the upper water pipe (18) are prevented from sliding in the vertical direction by rotating them relative to each other in the circumferential direction. The water pipe structure of the filtration device.   The said lower water pipe (17) and the said upper water pipe (18), The sliding fitting part of those at least up-down directions is formed in a cross-sectional ellipse, The said Claim 1 characterized by the above-mentioned. The water pipe structure of the filtration device.   The said filtration apparatus is a bottom face filtration apparatus, Comprising: The said lower water pipe (17) is connected to the spout which discharges the filtered water of the filtration frame (10) laid in the bottom face of the said water tank (V). The water pipe structure of the filtration device according to claim 1 or 2, wherein   The said filtration apparatus is an internal type filtration apparatus, Comprising: The said lower water pipe (17) is connected to the water outlet which discharges the filtered water of the filtration case (30) provided in the said water tank (V). The water pipe structure of the filtration device according to claim 1 or 2, characterized in that

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