JPH08232305A - Drain pipe for water tank and water tank having drain pipe - Google Patents

Abstract

PURPOSE: To prevent the deviation of a water flow channel from a net-like body such as insect net, etc., and to make it possible to discharge water at a low speed. CONSTITUTION: Spiral projections 59 are monolithically formed in an interior wall of a vertical pipe 27 from the upper end toward the lower side. Three projections 59 are provided vertically at equal intervals. The lower end of each of the projections 59 is so constructed that it is completed at a position of a collar 47 formed in a pipe main body 63. A male screw ring 49 is fixed to the circumference of the lower end of the pipe main body 63. An insect net 25 is thrust into the male screw ring 49 to provide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a drainage pipe for a water storage tank and a drainage pipe for a water storage tank which are connected to a water storage tank of a water storage tank installed in a condominium or the like and form a drainage flow path from above to below. Regarding a water tank having.

[0002]

2. Description of the Related Art Water is supplied to each room of a condominium or building by temporarily supplying tap water to a water tank of a water tank installed on the ground, and then using a pump from this water tank to supply water to each room. It is done by pumping water. A discharge pipe is connected to the water storage tank to prevent tap water from overflowing when the water level of the supplied tap water exceeds a specified level. And a water receiving pipe that receives tap water discharged from the drainage pipe. The drainage pipe and the receiving pipe are arranged at appropriate intervals so that the drainage does not flow back to the reservoir tank side and it is possible to easily confirm that the tap water is flowing out. An insect screen is often attached to the lower end of the pipe to prevent insects from entering. Rust etc. of the water supply pipe etc. is carried and adheres to the insect repellent net,
Since the insect screen must be replaced when clogging occurs, the distance between the drainage pipe and the water receiving pipe is set so that the insect screen can be replaced easily.

[0003]

By the way, if a space is provided between the drain pipe and the water receiving pipe, tap water discharged so as to be scattered from the insect repellent net will leave the drain passage from this space. It is convenient to wet the grounding surface of the water tank or tap water discharged from the insect screen against the upper end of the water receiving pipe to make a splash and to wet the grounding surface of the water tank. Absent. In order to prevent the discharged tap water from coming off the drainage channel or to prevent the splashes from splashing outside the water receiving pipe, the upper end of the water receiving pipe may be formed with a large diameter, It is not possible to make the diameter so large due to the problem of the arrangement space, the easy inclusion of leaves, etc., and the tendency of damage. In addition, tap water can be retained in the drainage flow path by narrowing the distance between the drainage pipe and the water receiving pipe, but this makes the work of replacing the insect repellent cumbersome and also prevents tap water from flowing out. The confirmation will also be hindered.

Therefore, the present invention is intended to solve the problems of the conventional drainage pipes for water storage tanks and water storage tanks in the related art, and more specifically, a net-like structure such as an insect net provided at one end on the lower side. It is an object of the present invention to provide a drainage pipe for a water storage tank and a water storage tank having this drainage pipe so that drainage can be discharged at a low speed so as not to come off the drainage flow path from the body.

[0005]

In order to achieve this object, a drainage pipe for a water tank of the present invention is a drainage pipe for a water tank having a mesh body at one end, and the drainage pipe is provided along an inner wall of a pipe body. One spiral projection or a plurality of spiral projections are formed. The mesh body is preferably attached to the outer periphery of one end of the pipe body. The spiral protrusion may extend to one end of the inner wall, that is, to one end of the pipe body, but may end before the end.

Further, the water storage tank of the present invention comprises a drainage pipe for water storage tank, which is provided with an insect net at the lower end and has one or a plurality of spiral projections formed along the inner wall of the pipe body. The water receiving pipe is connected to the water storage tank so as to extend in the vertical direction, and the water receiving pipe is arranged at a distance from the lower end of the water storage tank drain pipe. The insect screen is preferably attached to the outer periphery of the lower end of the pipe body. Further, the spiral projection may extend to the lower end of the inner wall, that is, the lower end of the pipe body, but may end before the lower end.

[0007]

In the drainage pipe for the water storage tank, since the spiral projection extending from the other end to the one end is formed along the inner wall of the pipe body, the drainage flowing from the other end is arranged in a swirling flow. It passes through the drainage pipe for the water tank toward one end while reducing the force of flow. In order to form a sufficiently ordered swirl flow, it is necessary to reduce the lengthwise spacing of the spiral protrusions, but if the pitch of the protrusions is reduced, swirl flow cannot be formed along this protrusion. . Therefore, it is effective to form a plurality of spiral protrusions having a relatively large pitch stepwise, that is, a plurality of stages.

In many cases, a net-like body such as an insect-proof net has a structure in which a net is attached to an opening on one end side of a short annular body, and the annular body is attached by being fitted to one end of the pipe body. When the mesh body is fitted inside the pipe body, a step portion is formed at one end inside the pipe body, and this step portion disturbs the flow of waste water and the waste water discharged from the mesh net is scattered around. May occur. Therefore, it is advisable to attach the mesh to the outside of the pipe body.
The protrusion may extend to one end of the inner wall, but may be configured to end before one end of the inner wall so that the swirling force of the drainage is weakened before the net of the mesh body. With this configuration, the swirling force and the momentum are reduced, and the undisturbed flow of the drainage passes through the mesh of the mesh, and the drainage discharged from the mesh of the mesh scatters to the surroundings, It is possible to effectively prevent a large splash at the upper end of the water receiving pipe.

In many cases, the drainage pipe for the water storage tank is arranged vertically with the insect screen on the lower side, but it may be arranged at an angle with the vertical direction, that is, at an angle.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a water storage tank according to the present invention.

The water tank 1 is installed on a concrete surface A beside a condominium (not shown) and supplies tap water to each room of this condominium. The water storage tank 3 of the water storage tank 1 has a short cylindrical shape, and is provided with support legs 5 on its lower surface.
A manhole 7 is provided on the upper surface. Water storage tank 3
The supply of tap water to the inside is performed from a water supply pipe 9 made of metal, but if the water level B of the stored tap water further rises, the tap water overflows so that the tap water overflows at a predetermined height position of the water storage tank 3. 11 is provided, and a drain pipe 13 is connected to the drain port 11. The discharge pipe 13 is
A drainage pipe 15 directly connected to the drainage port 11 and a water receiving pipe 19 having an upper end 17 formed in a funnel shape. The drainage pipe 15 includes a horizontal pipe 21 extending horizontally from the discharge port 11. Trap 2 on this horizontal pipe 21
3 and a vertical pipe 27 (water tank drainage pipe) which is vertically connected with the insect screen 25 attached to the lower end thereof. A space L1 of 15 cm is provided between the insect screen 25 and the water receiving pipe 19,
This distance L1 is sufficiently larger than the height of the insect screen 25. The tap water flowing out of the drainage port 11 passes through the horizontal pipe 21 of the drainage pipe 15 and descends in the vertical pipe 27, is discharged from the insect repellent net 25, is received by the upper end 17 of the water receiving pipe 19, and receives the water. It passes through the pipe 19 and is discharged into the sewage.

A discharge part 29 is formed at the center of the lower surface of the water storage tank 3, and a discharge pipe 31 is connected to the discharge part 29 so that the tap water stored inside the water storage tank 3 can be cleaned. Used for discharging. To remove tap water from the water storage tank 3, use a pump (not shown) to discharge most of the tap water, and then use tap pipe 31 to discharge tap water remaining at the bottom. In many cases, the discharge by the pumping pump and the discharge by the discharge pipe 31 are performed at the same time. The discharge pipe 31 is composed of a drainage valve part 33 directly connected to the discharge part 29 and a water receiving pipe 37 having an upper end 35 formed in a funnel shape. The drainage valve part 33 and the water receiving pipe 37 are connected to each other. An interval L2 of 10 cm is provided between them. Water leakage due to a failure of the drainage valve portion 33 can be confirmed from this interval L2. In addition, the vertical pipe 27 is formed to be relatively long, a connection pipe (not shown) is attached to the tip of the drainage valve portion 33, and the connection pipe is connected to the vertical pipe 27. The drainage from the pipe may be poured into the vertical pipe 27 and received by the water receiving pipe 19. In this case, it is a good idea to drain the valve of the drain valve section 33 by opening it halfway rather than fully opening it. In the figure, 39 is a ventilation pipe that is connected to the upper surface of the water storage tank 3 to connect the inner upper space of the water storage tank 3 to the atmosphere and has a net 41 for insect repellent at the tip, and 43 is connected to the supply valve portion 45. It is a supply pipe for supplying tap water to each room.

FIG. 2 is a perspective view showing a portion of the vertical pipe 27.

A stopper flange 47 is integrally formed at the lower end of the vertical pipe 27, and a metallic male screw ring 49 is fixed to the lower side of the flange 47. The insect repellent net 25 is a metal annular body 53 having a plurality of convex portions 51 for slip prevention formed at equal intervals in the circumferential direction on the outer periphery thereof, and a net 55 configured at the second mm is attached to the lower end opening of the metallic annular body 53. The female screw 57 (see FIG. 3) formed on the inner circumference is attached to the male screw ring 49 and the annular body 53.
It is attached to the outer periphery of the lower end of the vertical pipe 27 by screwing until the upper end of the vertical pipe hits the brim 47. Annular body 53
Is relatively high, and the convex portion 51 for preventing slippage is formed so as to extend from the lower end to the upper end of the annular body 53. Therefore, even if the insect net 25 is difficult to come off due to rust or the like, this The insect screen 25 can be rotated and removed and replaced.

FIG. 3 is a sectional view showing the structure of the vertical pipe 27, and FIG. 4 is a plan view of the vertical pipe 27.

On the inner wall of the vertical pipe 27 made of vinyl chloride, spiral projections 59 are integrally formed from the upper end toward the lower side, and three projections 59 are provided at equal intervals in the vertical direction. There is. The upper end of each protrusion 59 is configured so that the amount of protrusion to the inside gradually increases (see FIG. 4).
The lower end portion that ends at the 7th position is configured so that the amount of inward projection gradually decreases, and is configured so that the flow of drainage is not disturbed as much as possible. When installing a new water storage tank or changing the drainage structure of an existing water storage tank, if the vertical pipe is cut to an appropriate size with a saw for vinyl chloride, the upper end of each protrusion should also protrude significantly inward. However, in this case, the upper end portion of each protrusion may be shaved so that the amount of protrusion gradually increases. Adhesives for vinyl chloride, which are easy to use, are widely used for connecting pipes when installing or changing the drainage structure.

The upper end of the male screw ring 49 is embedded in the brim 47, and a protrusion 61 (see FIG. 2) is formed on the inside for preventing rotation.
Male thread ring 49 is fixed to the pipe body 63 by insert molding so that it is embedded in the pipe body 63.
It is embedded in 3 and attached.

[0019]

As described above, when the water storage tank is constructed by using the water storage tank drainage pipe of the present invention, it is possible to effectively prevent the installation location of the water storage tank from being wet by the drainage water from the water storage tank. it can.

[Brief description of drawings]

FIG. 1 is a front view showing a water tank according to the present invention.

FIG. 2 is a perspective view showing a vertical pipe portion.

FIG. 3 is a cross-sectional view showing a configuration of a vertical pipe.

FIG. 4 is a plan view of a vertical pipe.

[Explanation of symbols]

 3 Water storage tank 19 Water receiving pipe 25 Insect screen 27 Vertical pipe (drainage pipe for water storage tank) 59 Protrusion 63 Pipe body

Claims (4)

[Claims] 1. A drainage pipe for a water storage tank having a mesh body at one end, wherein one or a plurality of spiral projections are formed along the inner wall of the pipe body. Drain pipe for water tank. 2. The drainage pipe for a water storage tank according to claim 1, wherein the mesh body is attached to an outer periphery of one end of the pipe body. 3. The water drainage pipe for a water storage tank according to claim 2, wherein the protrusion ends before one end of the inner wall. 4. The drainage pipe for a water storage tank according to claim 1, further comprising an insect repellent net as the reticulate body, which is connected to the water storage tank so that the insect repellent net is on the lower side. A water tank characterized in that a water receiving pipe is arranged at a distance from the lower end of the pipe.