JPH03100220A - Diversion device - Google Patents

Abstract

PURPOSE:To keep the storm overflow quantity constant by installing a float for raising and lowering a vertical weir, following the vertical movement of the water level, into a vertical frame and installing an overflow weir for vertically changing the overflow position of water through the vertical movement with the vertical frame. CONSTITUTION:When the water level WL in a storm overflow 1 rises, a float 15 rises, and a rod 16 is pushed up and a vertical frame 5 is raised. Then, an overflow weir 22 suspended onto an arm 14 by a screw rod 20 rises, and the distance between the water level WL and an upper edge 22a is kept constant. Further, when the water level WL lowers, the float 15 lowers, and the overflow weir 22 lowers.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water diversion device mainly used in irrigation equipment to flow water from the middle of a main pipe into an irrigation canal.

[Conventional technology]

As a water diversion device, one shown in FIG. 5 is known. To explain this, a branch pipe 32 is branched from a main pipe 31 and opened to a water distribution volume 33 . A butterfly valve 35 that is opened and closed by a float 34 is attached to the branch pipe 32, and the water diversion amount 33
An overflow weir 37 is provided in the water diversion groove 36 so as to be adjustable up and down.

In this water diversion device, when the water surface WL of the water diversion amount 33 becomes low, the float 34 lowers and moves the butterfly valve 35 in the opening direction, and when the water surface WL becomes high, the float 34 rises and moves the butterfly valve 35 in the closing direction. move. Further, the overflow weir 37 determines the overflow position of water flowing from the water diversion groove 36 to the irrigation canal 38 .

[Problem to be solved by the invention]

In the above-mentioned conventional water diversion device, the water surface WL moves up and down by the automatic opening and closing of the butterfly valve 35 by the float 34, so the amount of water flowing from the water diversion groove 36 to the irrigation canal 38 fluctuates greatly, resulting in accurate It is not possible to determine the water diversion amount.

An object of the present invention is to provide a water diversion device that can always accurately flow a predetermined amount of water from the middle of a main pipe into an irrigation canal, regardless of vertical fluctuations in the water level.

[Means to solve the problem]

In order to achieve the above object, the present invention provides upper and lower frames that are movable up and down along a guide mechanism on the upstream side of a partition wall in which a water diversion groove is provided, and that the upper and lower frames are provided with a A float that moves the upper and lower frames up and down by following the up and down of the floating water surface,
The overflow weir is disposed vertically freely in the water diversion ditch and moves up and down together with the upper and lower frames to vertically change the overflow position of water flowing from the diversion ditch to the irrigation canal, and the vertical positions of each other are adjusted relative to each other. The structure was set up freely.

[Effect]

A float floating on the water surface rises as the water surface rises, and descends as the water surface falls. Following the vertical movement of this float, the overflow weir moves up and down via the upper and lower frames, changing the overflow position of water flowing from the diversion ditch into the irrigation canal up and down, keeping the distance from the water surface to the overflow position constant. . Therefore, the amount of water diverted is maintained constant regardless of whether the water level is above or below.

When it becomes necessary to increase the amount of water flowing from the diversion ditch to the irrigation canal, the overflow weir is lowered relative to the float. Additionally, to reduce the amount of water diverted, the overflow weir is raised relative to the float.

〔Example〕

1 to 4 show an embodiment of a water diversion device according to the present invention, and reference numeral 1 in the figures indicates a water diversion amount made of concrete. A protruding part 3 is provided protrudingly on the inside of the partition wall 2 (on the near side in Fig. 1, on the lower side in Fig. 2) with the water diversion amount l, and a water diversion groove (hole) 3a extends from the protruding part 3 to the partition wall 2. is formed. A pair of left and right guide mechanisms 4, 4 are provided inside the protrusion 3.
is provided, and the upper and lower frames 5 are guided vertically freely in the guide mechanism 4.4. According to the conventional example shown in FIG. 5, a main pipe (not shown) is provided on the lower side of the partition wall 2 in FIG. 2, and an irrigation channel (not shown) is provided on the upper side.

The guide mechanism 4 includes a first fixed door stopper 7 made of metal that is fixed to the inner end surface of the protruding part 3 with an anchor bolt 6, and is vertically fixed to the first fixed door stopper 7 using the anchor bolt 6. metal second fixed door per 8 and this second fixed door per 8
are attached to the ends of the above with bolts 9 in parallel with the first fixed door stop 7, and the first fixed door stop 7 and the second fixed door stop 8 are attached to the ends of the
a guide lO forming a guide groove M in cooperation with the first guide lO;
It consists of a first water stop plate 11 made of Teflon with a small coefficient of friction and attached to the fixed door stopper 7. The first fixed door stopper 7 and the second fixed door stopper 8 are vertically provided, and their lower portions extending below the protruding portion 3 are supported by a pedestal 12.

The upper and lower frame 5 includes a pair of left and right guide parts 13.13 and an arm 14 horizontally installed above the guide parts 13.13. The guide part 13 is guided up and down by the guide mechanism 4, and a metal movable door stopper 13a and a first movable door stop 13b are attached to a second moveable door stop 13d having a rib 13c with screws 13e. The second water stop plate 13F made of Teflon is attached to the movable door stop water stop plate 13a, which is connected in a channel shape.

This guide part 13 brings the movable door stop plate 13a into contact with the first water stop plate I■, and brings the first movable door stop plate 13b into contact with the guide 10.
Furthermore, the ribs 13c of the second movable door stop 13d are fitted into the guide groove M so as to be vertically movable, with the ribs 13c facing the second fixed door stop 8, respectively.

The upper ends of rods 16, 16 to which the float 15 is fixed are screwed to the left and right ends of the arm 14, respectively, and the rods 16 are connected to bearings 17 provided on the inner wall of the water division l.
It is supported vertically freely. The rod 16 is connected to the upper and lower frames 5
Similarly to the guide section 13, it is arranged vertically and transmits the vertical movement of the float 15 to the upper and lower frames 5. The float 15 has a plug 1 for putting ballast water in and out of the float 15.
5a.

15b is provided, and the buoyancy (sensitivity) of the float 15 can be adjusted by adjusting the amount of ballast.

In addition, a female thread 18 is provided at the center of the arm 14 of the upper and lower frames 5.
is supported by a female screw receiver 19 and is provided rotatably in the circumferential direction. A threaded rod 20 passing vertically through the arm 14 is screwed onto this female thread 18, and an overflow weir 22 is suspended by a hanging shaft 23 from a joint 21 attached to the lower end of the rod. The overflow weir 22 defines the overflow position of water flowing from the water diversion volume l to the water diversion groove 3a by its upper edge 22a,
The left and right side edges are fitted between the push plate 25 made of a spring material whose lower end is attached to the first movable door stop 13b with a screw 24 and the second water stop plate 13f, and the guide portion 13 of the upper and lower frames 5 is inserted.
13 so that it can be moved up and down.

With the above configuration, the overflow weir 22 moves up and down together with the upper and lower frames 5, and also moves up and down with respect to the upper and lower frames 5 by rotation of the female screw 18 by the handle 26 fitted to the square shaft portion 18a of the female screw 18. . The pair of left and right floats C1-) 15.15 have sufficient buoyancy, float on the water surface WL, and move the overflow weir 22 up and down together with the upper and lower frames 5 according to the up and down of the water surface WL. The push plate 25 presses the overflow weir 22 against the second water stop plate 13f, and its elasticity can be adjusted by pushing its upper end with an adjustment bolt 27 screwed onto the second movable door stop 13d. ing.

Next, the operation of the water diversion device according to the present invention configured as described above will be explained.

When the water surface WL within water division 1 increases from the state shown by the solid line in Figure 1 to the state shown by the two-dot chain line, the float 15.15
rises, pushes the rods 16, 16 upward, and raises the upper and lower frames 5. As the upper and lower frames 5 rise, the threaded rods 2 are attached to the arms 14.
The overflow weir 22 suspended at 0 also rises to maintain a constant distance between the water surface WL and the upper edge 22a. Also, when the water surface WL drops from the state shown by the two-dot chain line to the state shown by the solid line, the floats 15 and 15 act to lower the overflow weir 22 as the water surface WL decreases, as in 7H.

Therefore, the amount of water flowing into the water diversion groove 3a is maintained constant regardless of the vertical movement of the water surface WL.

Note that the water stop plates 11, 13a, and 13f prevent water from leaking from the sides of the overflow weir 22.

To increase the water diversion amount, turn the female screw 18 with the handle 26 to lower the overflow weir 22 relative to the float 15.15, and to decrease the water diversion amount, conversely, the overflow weir 22 to rise.

In addition, the overflow weir 22 is fixed to the upper and lower frames 5, and the flow) 15.
15 can be moved up and down to adjust the water amount. Also, the water division amount 1 is usually the 5th
Similar to the conventional example shown in the figure, it is connected to the main pipe by a branch pipe equipped with a float type butterfly valve, but in the present invention, the connection form of the main pipe with respect to the water division amount l is not limited to the above.

[Effects of the Invention] As explained above, in the water diversion device according to the present invention, the upper and lower frames are provided on the upstream side of the partition wall in which the water diversion groove is provided, and are vertically movable along the guide mechanism. The frame includes a float that floats on the water surface on the upstream side and follows the water surface up and down to move the frame up and down, and a float that is placed in the water diversion ditch and moves up and down along with the upper and lower frames to move the water from the water diversion ditch to the irrigation canal. The overflow weir changes the overflow position of the water flowing up and down, and the overflow weir is configured to be able to adjust the vertical position relative to each other, so the water level may fluctuate up and down. It also has the advantage of being able to maintain a constant amount of water at all times.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention,
Figure 1 is a vertical front view, Figure 2 is a partially cutaway plan view, Figure 3 is a sectional view of the section taken along line III-I [1] in Figure 1, Figure 4 is the overflow weir and water stop plate, Alternatively, it is a cross-sectional view showing the relationship between a screw rod and the like. FIG. 5 is a sectional view of a conventional water diversion device. 2... Partition wall 3a... Water diversion ditch 4...
Guide mechanism 5... Upper and lower frames 15... Float 22... Overflow weir WL... Water surface

Claims (1)

[Claims] Upper and lower frames are provided on the upstream side of the partition wall in which the water diversion groove is provided, and are vertically movable along the guide mechanism.
A float that floats on the water surface on the upstream side moves the upper and lower frames up and down by following the up and down of the water surface, and a float that is placed in the water diversion ditch and moves up and down with the upper and lower frames to prevent overflow of water flowing from the water diversion ditch to the irrigation canal. A water diversion device characterized in that an overflow weir that changes the flow position vertically is provided so that the vertical positions of each other can be adjusted freely.