JPH0947165A - Drain valve for setting water level - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain valve for setting the water-level of a paddy field by using an extendible corrugated tube. SOLUTION: A short pipe 21 is extended through the bottom 11 of a top- opened protecting pipe 1. An extensible corrugated tube 2 is connected to the top of the short pipe 21 and an action rod 3 protruding from the top of the corrugated tube 2 is supported in a vertically movable manner by a frame 13 formed on the top opening of the protecting pipe 1. A draining hole 120 is opened on the side wall 12 of the protecting pipe 1. A draining pipe 5 is connected through a joint 4 to the lower end of the short pipe 21 and a through hole 111 of the bottom 11 of the protecting pipe 1 is connected to the joint 4 through a duct 6 and openably closed with a plug 7. Since the water-level is adjusted by using the extensible corrugated tube, the normal function is maintained even by the intrusion of mud water, etc., from the paddy field.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage valve installed in a paddy field, and more particularly to a drainage level setting drainage valve capable of maintaining a constant rice field water level.

[0002]

2. Description of the Related Art In recent years, with the urbanization of rural areas, farmers have become part-time jobs, and there is an increasing demand for automation and labor saving of agricultural work and the like due to reduction and limitation of working hours. Under such historical background, water supply management of paddy fields is performed by starting and stopping water supply by a fully automatic or semi-automatic water faucet.

However, when the water level is set by the fully automatic or semi-automatic water faucet, the paddy water level may become higher than a predetermined water level due to excessive water supply from the water faucet. Therefore, conventionally, a drain valve capable of vertically sliding an inner cylinder and an outer cylinder is installed in a paddy field, and an upper end of the drain valve is set to a predetermined height to discharge excessively supplied water. Has been done.

[0004]

However, in the conventional drain valve for adjusting the height by sliding the inner cylinder and the outer cylinder, when the muddy water of the paddy field enters the sliding surface of the inner cylinder and the outer cylinder. There was a problem that the height could not be adjusted.
The present invention solves such a problem, and provides a drainage valve for water level setting which enables the height of the rice field water level to be adjusted by a bellows portion having elasticity.

[0005]

According to the present invention, a short pipe is connected through a bottom wall of a protective cylinder having an upper opening, and a bellows pipe having elasticity is connected to an upper end of the short pipe. The actuating rod raised from the upper end of the bellows pipe is vertically movably locked to the frame inserted in the upper opening of the protective cylinder, while the drain pipe is connected to the lower end of the short pipe through a joint to protect it. The through hole provided in the bottom wall of the tubular body and the joint are connected by a conduit, the through hole is openably and closably closed by a plug body, and a drainage hole is provided in the side wall of the protective tubular body. To do.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The drainage valve of the present invention is installed in a paddy field and comprises a protective cylinder 1 and a bellows tube 2 disposed in the protective cylinder 1. A drainage hole 120 is provided on the side wall of the protective cylinder body 1, and the water in the paddy field flows into the protective cylinder body 1 through the collared short pipe 8 connected to the drainage hole 120. Further, a short pipe 21 penetrates and is connected to a bottom wall 11 of the protective cylinder 1, and a bellows pipe 2 is connected to an upper end of the short pipe 21.

The bellows tube 2 is made of rubber, soft plastic or the like in a bellows shape to give elasticity, and a cylinder 22 is attached to the upper end thereof. A support bar 221 is provided on the upper end of the tubular body 22, and the operating rod 3 raised from the center of the support bar 221 is vertically movable to the frame 13 provided on the upper end opening of the protective tubular body 1. It is locked. In addition, a scale 10 is provided inside the protective cylinder 1.
Is provided, and the cylindrical body 22 is fitted to the scale 10.
By adjusting the height position of the upper end of the paddy field, the rice field water level can be set constant.

On the other hand, a drain pipe 5 is connected to the lower end of the short pipe 21 via a joint 4 so that water overflowing from the upper end of the bellows pipe 2 and introduced into the drain pipe 5 can be discharged. Has become. Further, the through hole 111 provided in the bottom wall 11 of the protective cylinder 1 and the joint 4 are connected by the conduit 6, and the through hole 111 is closed by the plug body 7 so as to be opened and closed. Therefore, when the muddy water of the paddy field flows into the protective cylinder 1 and the mud or the like is deposited on the bottom wall 11, the plug 7 can be pulled out and the mud or the like can be discharged from the through hole 111 to the drain pipe 5.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view of a water level setting drain valve showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the water level setting drain valve, in which reference numeral 1 is a protective cylinder, and 2 is a bellows tube. is there.

The drainage valve of the present invention is installed in a paddy field and comprises a protective cylinder 1 and a bellows tube 2. The protective cylinder 1 is formed of plastic, concrete, or the like into a cylindrical shape or a square cylindrical shape, and the short tube 8 with a collar is connected to a drainage hole 120 opened in the side wall 12 of the protective cylinder 1 exposed from the ground surface. The water in the paddy field flows into the protective cylinder 1 through the short pipe 8 with the collar.

A short pipe 21 penetrates and is connected to a bottom wall 11 of the protective cylinder 1, and a bellows pipe 2 is connected to an upper end of the short pipe 21. The bellows tube 2 is made of rubber, soft plastic or the like in a bellows shape to give elasticity, and a cylinder 22 is attached to the upper end thereof. A support bar 221 is spanned on the upper end of the cylindrical body 22, and an operating rod 3 raised from the center of the support bar 221 is vertically movable on a frame 13 spanned on the upper end opening of the protective cylindrical body 1. It has been stopped. That is, the operating rod 3 penetrating the supporting portion 131 of the frame 13 can be fixed with the screw 132.

A scale 10 is provided inside the protective cylinder 1.
Is provided, and the cylindrical body 22 is fitted to the scale 10.
By adjusting the height position of the upper end of the paddy field, the rice field water level can be set constant. By setting the height position of the tubular body 22 in this way, when the water level on the rice field becomes higher than the upper end of the tubular body 22, the excess water supplied to the paddy field is supplied from the short tube 8 with a collar to the protective tubular body 1. It flows into the inside, and flows into the drainage pipe 5 through the upper end opening of the tubular body 22 and is discharged. As a result, the rice field water level is automatically maintained at a predetermined height.

Further, the through hole 1 is formed in the bottom wall 11 of the protective cylinder 1.
11 is provided, and the conduit 6 hanging from the through hole 111 and the branch pipe 41 of the joint 4 are connected to each other. Normal,
The through hole 111 is closed by the plug body 7. However, when muddy water in the paddy field flows into the protective cylinder 1 and deposits on the bottom wall 11, the plug body 7 is pulled out to the drain pipe 5 from the through hole 111. Can be discharged.

Further, the branch pipe 41 is for completely draining the water of the paddy field during the harvest season or the winter season, and as shown in FIG. 2, the neighboring ground is dug up to form the depression G and then covered. Remove the plate 9. Then, the water accumulated on the ground surface of the paddy field is guided to the depression G, flows into the drainage pipe 5 from the opening end of the branch pipe 41, and is discharged. Normally, the open end of the branch pipe 41 is covered with the cover plate 9
It is covered with to prevent mud from entering.

[0015]

As described above in detail, since the height of the drain valve of the present invention is adjusted by the bellows tube having elasticity, it may become inoperable even when muddy water of the paddy field flows into the drain. Instead, the surface water level can be set to a predetermined height. Further, since a through hole is provided in the bottom wall of the protective cylinder and the through hole and the joint are connected by a conduit and the through hole is openably and closably closed with a plug, the mud water of the paddy flows into the protective cylinder. Even if it is deposited on the bottom wall, it can be easily discharged to the drain pipe by pulling out the plug body, and malfunction does not occur due to the accumulation of earth and sand.

[Brief description of drawings]

FIG. 1 is a plan view of a water level setting drain valve showing an embodiment of the present invention.

2 is a cross-sectional view of the water level setting drain valve shown in FIG.

[Explanation of symbols]

 1 Protective cylinder 2 Bellows pipe 3 Actuating rod 4 Joint 5 Drain pipe

Claims (1)

[Claims] 1. A short pipe (21) is connected to the short pipe (2) by penetrating a bottom wall (11) of a protective cylinder (1) having an upper opening.
An elastic bellows tube (2) is connected to the upper end of 1), and an operating rod (3) raised from the upper end of the bellows tube (2) is passed to the upper end opening of the protective tubular body (1). It is locked to the frame (13) so that it can move up and down, while the short pipe (2
A drainage pipe (5) is connected to the lower end of 1) via a joint (4), and a through hole (111) provided in the bottom wall (11) of the protective tubular body (1) and the joint (4). The through hole (111) is connected by a conduit (6), the through hole (111) is openably and closably closed by a plug body (7), and a drain hole (1) is formed in a side wall (12) of the protective cylinder body (1).
20) The drain valve for setting the water level, which is characterized by being provided.