JPH0781261B2 - Water diversion device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a water diversion device mainly used in irrigation equipment to flow water from the middle of a main pipe to an irrigation canal.

[Conventional technology]

As a water diversion device, one shown in FIG. 5 is known. Explaining this, a branch pipe 32 is branched from the main pipe 31 and is provided so as to open to a water diversion tub 33. Branch pipe 32 above
The butterfly valve 35 is opened and closed by a float 34
And an overflow weir 37 is provided in the water diversion groove 36 of the water diversion chamber 33 so as to be vertically adjustable.

In this water diversion device, when the water level WL of the water diversion tank 33 becomes low, the float 34 lowers to move the butterfly valve 35 in the opening direction,
When the water level WL rises, the float 34 rises and moves the butterfly valve 35 in the closing direction. In addition, the overflow weir 37 is
The overflow position of the water flowing from the to the canal 38 is determined.

[Problems to be Solved by the Invention]

In the above conventional water diversion device, since the water surface WL moves up and down by the automatic opening and closing of the butterfly valve 35 by the float 34, the amount of water flowing from the water diversion groove 36 to the irrigation channel 38 will fluctuate greatly. It is not possible to determine the amount of water division.

INDUSTRIAL APPLICABILITY According to the present invention, a predetermined amount of water can always flow accurately from the middle of the main pipe to the irrigation channel regardless of the vertical movement of the water surface, and there is no water leakage, and the overflow weir operates smoothly up and down. An object of the present invention is to provide a water diversion device that can be used.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a pair of left and right first fixed doors vertically fixed by fixing means on both left and right sides of an upstream surface of a projecting portion of a water diversion basin provided with water diversion grooves. Hits, second fixed door hits vertically projecting and fixed vertically to the upstream surface of each first fixed door hit, and the upstream side of the first fixed door hit at the tip of each second fixed door hit. Is provided parallel to the plane of
A guide in which a guide groove is formed in cooperation with the first fixed door contact and the second fixed door contact, and a movable door contact water stop plate and a first movable door contact are connected in a channel shape at the second movable door contact. An arm having right and left parts and both ends protruding to the left and right of the guide part, and a movable door contact water stop plate and a first movable door contact and a second movable door contact are provided with the first fixed door contact, the guide, and An upper and lower frame provided with the guide portion in the guide groove so as to be vertically movable in a state of being individually faced to the second fixed door contact, a movable door contact water stop plate for the first fixed door contact and the upper and lower frame, respectively. And the first water stop plate provided between the movable door contact water stop plate and the movable water contact plate above and below the movable door contact water stop plate immediately above and below the movable door contact water stop plate. And an overflow weir that changes the overflow position of the water flowing from the diversion channel to the irrigation channel by the upper edge. A pair of left and right rods vertically attached to the bearings provided on the diversion basin, which are individually attached to both ends of the arm and vertically supported, and stoppers for taking in and out ballast water are provided at the upper and lower sides, and upstream of the diversion groove. A pair of left and right floats floating on the side water surface and attached to the rods respectively to follow the water surface above and below to raise and lower the upper and lower frames together with the overflow weir, and the vertical position of the overflow weir relative to the float. Provided vertically between the overflow weir and the first movable door contact, and a second water stop plate disposed between the movable door contact water stop plate and the overflow weir. And a pressing adjustment means that is attached to the first movable door and presses the overflow weir against the second water stop plate via the pressing member.

[Action]

The float floating on the water surface rises accordingly when the water surface rises and descends when the water surface falls. Following this vertical movement of the float, the overflow weir moves up and down via the upper and lower frames, and the overflow position of the water flowing from the molecular groove to the irrigation canal is changed up and down to keep the distance from the water surface to the overflow position constant. Therefore, the amount of water can be kept constant regardless of the water level above and below.

When it becomes necessary to increase the amount of water diversion from the water diversion channel to the irrigation canal, the overflow weir is lowered relative to the float. To reduce the amount of water diversion, raise the overflow weir relative to the float.

The first water stop plate prevents water leakage between the first fixed door stop and the movable door contact water stop plate of the guide portion, and the second water stop plate is the movable door contact water stop plate and the overflow weir. Prevent water leakage between. When the pressing force of the overflow weir by the pressing member is increased by the pressing adjustment means, the liquid tightness between the movable door contact water stop plate and the overflow weir is increased.

If the vertical movement force of the guide part, which is obtained by subtracting the vertical movement resistance of the guide part from the buoyancy force of the float, is different on the left and right, adjust the buoyancy of the pair of floats by adjusting the amount of ballast water by operating the plug. Thus, the left and right vertical movement forces of the upper and lower frames are matched with each other. This allows the upper and lower frames to smoothly move up and down together with the overflow weir.

〔Example〕

1 to 4 show an embodiment of the water diversion device according to the present invention, in which reference numeral 1 is a concrete water diversion stub. A projecting portion 3 is provided so as to project inside the partition wall 2 of the water diversion tank 1 (front side in FIG. 1 and lower side in FIG. 2).
A water diversion groove (hole) 3a is formed from the partition wall 2 to the partition wall 2. The surface on the upstream side of the protrusion 3 (the front side in FIG. 1, the second side
A pair of left and right guide mechanisms 4, 4 are provided on the lower surface in the drawing), and an upper and lower frame 5 is vertically guided by the guide mechanisms 4, 4. According to the conventional example of FIG. 5, a main pipe (not shown) is arranged on the lower side of the partition wall 2 in FIG. 2, and a water channel (not shown) is arranged on the upper side.

The guide mechanism 4 includes a metal first fixed door contact 7 fixed to the upstream surface of the protrusion 3 with anchor bolts (fixing means) 6.
And using the anchor bolt 6, the first fixed door contact 7
Of the second fixed door 8 made of metal fixed vertically to the upstream surface of the first fixed door 7, and the bolt 9 parallel to the upstream surface of the first fixed door 7 at the tip of the second fixed door 8. And a guide 10 having a guide groove M formed in cooperation with the first fixed door contact 7 and the second fixed door contact 8 and made of Teflon with a small friction coefficient attached to the first fixed door contact 7. It consists of the first water stop plate 11. The first fixed door contact 7 and the second fixed door contact 8 are provided vertically, and the lower portion extending below the protrusion 3 is supported by the pedestal 12. The guide on the right side in Fig. 1
10 is omitted.

The upper and lower frames 5 include a pair of left and right guide portions 13,13 and the guide portions 13,13.
And both ends of the arm 14 project horizontally to the left and right of the guide portions 13 and 13. Each of the guide portions 13 is guided up and down by the guide mechanism 4, and has a metal movable door contact water stop plate 13a and a first movable door contact 13b, and a screw 13e on a second movable door contact 13d having a rib 13c. It is made by connecting in a channel shape. The movable water stop plate 13a has a second Teflon-made second
The water stop plate 13f is attached. This guide part 13, 13 is the first
The movable door contact water stop plate 13a is brought into contact with the water stop plate 11, the first movable door contact 13b is used as the guide 10, and the second movable door contact 13d is ribbed.
13c together with the second fixed door contact 8 are respectively fitted in the guide grooves M, M so as to be vertically movable.

The upper ends of rods 16 and 16 to which a float 15 is fixed are respectively screwed to both left and right ends of the arm 14, and the rod 16 is vertically supported by a bearing 17 provided on the inner wall of the water diversion basin 1. Has been done. The rod 16 is a guide portion 13 of the upper and lower frames 5.
Similarly, it is arranged vertically and transmits the vertical movement of the float 15 to the upper and lower frames 5. The float is above and below the float 15.
Stoppers 15a and 15b for taking in and out ballast water are provided inside the 15, and the buoyancy (sensitivity) of the float 15 can be adjusted by the amount of ballast.

A female screw 18 is supported by a female screw receiver 19 at the center of the arm 14 of the upper and lower frames 5 so as to be rotatable in the circumferential direction. A screw rod 20 that penetrates the arm 14 vertically is screwed to the female screw 18, and an overflow weir 22 is suspended by a suspension shaft 23 on a joint 21 attached to the lower end thereof. The overflow weir 22 is located at the upper edge 22a of the overflow position of the water flowing from the water diversion tank 1 to the water diversion groove 3a.
It is determined by, and screw 2 to the first movable door 13b
The left and right side edges are fitted between the pushing plate (pushing member) 25 made of a spring material attached to the lower end of 4 and the second water blocking plate 13f to freely move up and down in the guide portions 13, 13 of the upper and lower frames 5. Is attached to. The female screw 18, the screw rod 20 and the like constitute up-down adjusting means.

With the above structure, the overflow weir 22 moves up and down together with the upper and lower frames 5, and moves up and down with respect to the upper and lower frames 5 by the rotation of the female screw 18 by the handle 26 fitted to the angular shaft portion 18a of the screw 18. . The pair of left and right floats 15 and 15 have sufficient buoyancy and float on the water surface WL and follow the upper and lower parts of the water surface WL to the overflow weir 22.
Is moved up and down together with the upper and lower frames 5. The push plate 25 presses the overflow weir 22 against the second water blocking plate 13f, and the second movable door contact 13d.
The elastic force can be adjusted by pushing the upper end of the adjusting bolt (pressing adjusting means) 27 screwed to the.

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

When the water level WL in the diversion tub 1 rises from the state shown by the solid line in FIG. 1 to the state shown by the two-dot chain line, the floats 15 and 15 rise accordingly and push the rods 16 and 16 upward to raise the upper and lower frames 5. .
As the upper and lower frames 5 rise, the overflow weir 22 suspended by the screw rod 20 on the arm 14 also rises to keep the distance between the water surface WL and the upper edge 22a constant. Also, when the water surface WL drops from the two-dot chain line state to the solid line state, the floats 15 and 15 act in the same manner as described above to lower the overflow weir 22 as the water surface WL lowers.

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

When increasing the water diversion amount, the female screw 18 is rotated by the handle 26 to lower the overflow weir 22 with respect to the floats 15 and 15, and when decreasing the water diversion amount, the overflow weir 22 is turned on the contrary. Raise.

In the above, the first water stop plate 11 prevents water leakage between the first fixed door contact 7 and the movable door contact water stop plate 13a of the guide portion 13,
In addition, the second water stop plate 13f includes a movable door contact water stop plate 13a and an overflow weir.
Prevent water leakage between 22 and. If the pressing force of the overflow weir 22 by the push plate 25 is increased by the adjusting screw 27, the liquid tightness between the movable door contact water stop plate 13a and the overflow weir 22 is enhanced.

When the vertical movement force of the guide portion 13 obtained by subtracting the vertical movement resistance of the guide portion 13 from the buoyancy of the float 15 is different between the left and right, the amount of ballast water is adjusted by operating the plugs 15a and 15b to adjust the pair of left and right sides. By adjusting the buoyancy of the floats 15, 15, the left and right vertical movement forces of the upper and lower frames 5 are made to coincide with each other.
As a result, the upper and lower frames 5 can be smoothly moved up and down together with the overflow weir 22.

As described above, when the pressing force of the overflow weir 22 is increased by the adjusting screw 27, the movable door contact water stop plate 13a bends toward the first water stop plate 11 side and is slightly and strongly pressed against the first water stop plate 11. As a result, it is expected that the vertical movement resistance of the guide portion 13 moving up and down along the guide groove M can be slightly changed. Therefore, the vertical movement resistance of the guide portions 13 and 13 can be individually adjusted with high accuracy. It is possible to make the vertical movement forces match each other.

The overflow weir 22 may be fixed to the upper and lower frames 5, and the floats 15 and 15 may be moved up and down to adjust the water diversion amount. Further, the water diversion tank 1 is usually connected to the main water pipe by a branch pipe equipped with a float type butterfly valve as in the conventional case shown in FIG. The form is not limited to the above.

〔The invention's effect〕

As described above, in the water diversion device according to the present invention, the pair of left and right first vertical members fixed vertically by the fixing means on both the left and right sides of the upstream surface of the protrusion in which the water diversion groove is provided. The fixed door contact, the second fixed door contact vertically projecting vertically to the upstream surface of each first fixed door contact, and the first fixed door contact at the tip of each second fixed door contact. A guide that is provided in parallel with the upstream surface and that has a guide groove in cooperation with the first fixed door contact and the second fixed door contact; the movable door contact water stop plate;
A movable door contact water stop plate and a first movable door are provided, each having a guide portion in which the movable door contact and the second movable door contact are connected in a channel shape, and arms provided with both ends protruding to the left and right of the guide portion. An upper and lower frame provided with the guide portion guided by the guide groove so that the contact and the second movable door contact respectively face the first fixed door contact and the guide and second fixed door contact, respectively. And a first water stop plate provided between the first fixed door contact and the movable door contact water stop plates of the upper and lower frames, and the left and right side edges of the movable door contact water stop plates facing each other. Overflow weir arranged on the upstream side of the water stop plate for the movable door and moving up and down together with the upper and lower frames to vertically move the overflow position of the water flowing from the diversion groove to the irrigation channel by the upper edge, and both ends of the arm. Vertically attached to the bearings attached to the diversion basin, which are individually attached to the A pair of left and right supported rods and stoppers for taking in and out ballast water are provided on the top and bottom.Floating on the water surface upstream of the diversion groove, they are attached to the rods respectively and follow the top and bottom of the water surface to overflow the upper and lower frames. A pair of left and right floats that move up and down together with the weir, an up-down adjusting means that adjusts the up-down position of the overflow weir relative to the float, and an arrangement between the movable door contact water stop plate and the overflow weir. The second water stop plate provided, the pushing member provided between the overflow weir and the first movable door contact, and the overflow weir attached to the first movable door contact via the pushing member. Since it is configured to include the pressing adjustment means for pressing the second water stop plate, the following effects are obtained.

Even if the water surface fluctuates up and down, a constant amount of water can be maintained.

The first water stop plate prevents water leakage between the first fixed door contact and the movable door contact water stop plate of the guide portion, and the second water stop plate
Since the water leakage between the water blocking plate for the movable door and the overflow weir is prevented, it is possible to prevent the accuracy of the water dividing amount from being lowered due to the water leakage.

It is difficult to match the vertical movement force of the guide part, which is obtained by subtracting the vertical movement resistance of the guide part from the buoyancy of the float, in the left and right guide parts, except due to machining error or assembly error. If it does not, the smooth vertical operation of the upper and lower frames is hindered.However, in the present invention, by adjusting the buoyancy of the float by adjusting the amount of ballast water by operating the upper and lower stoppers of the float, the left and right of the upper and lower frames can be adjusted. The upper and lower frames can be smoothly moved up and down together with the overflow weir by matching up and down movement forces of the above.

When the pressing force of the overflow weir by the pressing member is increased by the pressing adjustment means, the liquid tightness between the movable door contact water stop plate and the overflow weir increases, but as in the embodiment, the movable door contact water stop plate is When it is made of metal and is given flexibility, when the pressing force of the overflow weir is strengthened by the pressing adjustment means, the movable door contact water stop plate is moved to the first position.
Since it flexes toward the water stop plate side and can be pressed strongly against the first water stop plate slightly, it can be expected to slightly change the vertical movement resistance of the guide portion that moves up and down along the guide groove.
This makes it possible to individually adjust the vertical movement resistance of the guide portion with high accuracy and make the vertical movement forces thereof coincide with each other.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention.
Fig. 1 is a vertical front view, Fig. 2 is a partially cutaway plan view, Fig. 3 is a cross-sectional view taken along the line III-III in Fig. 1, and Fig. 4 is an overflow weir and a water stop plate, or a screw. It is sectional drawing which shows the relationship of a stick | rod. FIG. 5 is a sectional view of a conventional water diversion device. 1 ... Water diversion tank, 2 ... Partition wall, 3 ... Projection part 3a ... Water diversion groove, 4 ... Guide mechanism, 5 ... Upper and lower frame 6 ... Anchor bolt (fixing means), 7 ... No. 1 fixed door contact 8 …… second fixed door contact, 10 …… guide, 13 …… guide part 13a …… moving door contact water stop plate, 13b …… first movable door contact 13d …… second movable door contact, 13f …… second water stop plate, 14 …… arm 15 …… float, 15a, 15b …… plug, 16 …… rod 17 …… bearing, 22 …… overflow weir, 22a …… upper edge 25 …… push Plate (pushing member) 27 ... Adjusting screw (pressing adjusting means), M ... Guide groove WL ... Water surface

Claims (1)

[Claims] 1. Fixing means (6) on both left and right sides of an upstream surface of a projection (3) provided with a water diversion groove (3a) of a water diversion basin (1).
A pair of left and right fixed first doors fixed vertically with (7,7)
And a second fixed door contact (8) vertically protruding from the first fixed door contact (7) to the upstream surface of the first fixed door contact (8) and each second fixed door contact (7).
The first fixed door contact (7) at the tip of the fixed door contact (8)
A guide (10) provided in parallel with the surface of the upstream side of the guide and having a guide groove (M) in cooperation with the first fixed door contact (7) and the second fixed door contact (8), and the movable door contact. The water blocking plate (13a) and the first movable door contact (13b) are connected to the second movable door contact (13d) in the form of a channel, and guide portions (13) are provided on the left and right, and both end portions are connected to the guide portion (13, The movable door stop water stop plate (13a), the first movable door contact (13b), and the second movable door contact (13d) are provided with the arms (14) projecting to the left and right of the first fixed door contact (13). 7), the guide (10) and the second fixed door contact (8) are individually faced to each other, and the guide portions (13, 13) are vertically guided by the guide grooves (M, M). The upper and lower frames (5) and the first
A first water stop plate (11) provided between the fixed door contact (7) and the movable door contact water stop plate (13a) of the upper and lower frames (5), and the both movable door contact water stop plates (13a). , 13a) with the left and right side edges facing each other, and is arranged upstream of the movable door contact water stop plate (13a, 13a) and moves up and down together with the upper and lower frame (5) to form the diversion channel (3a) into the water channel. The overflow weir (22) that changes the overflow position of the flowing water up and down by the upper edge (22a), and the bearing (1) individually attached to both ends of the arm (14) and provided in the water diversion basin (1) ( 17) A pair of left and right rods (16) vertically supported vertically, and stoppers (15a, 15a) for taking in and out ballast water.
b) is provided on the top and bottom, is floated on the water surface (WL) on the upstream side of the diversion groove (3a) and is attached to each of the rods (16), and follows the top and bottom of the water surface (WL), and the upper and lower frames (5)
And a pair of left and right floats (15, 15) for moving up and down together with the overflow weir (22), and the overflow weir (2) for the float (15).
Vertical adjustment means (18,2)
0), a second water stop plate (13f) disposed between the movable door contact water stop plate (13a) and the overflow weir (22), and the overflow weir (2).
2) and the first movable door contact (13b), and a push member (25) provided between the first movable door contact (13b) and the overflow weir ( 22) above the second
A water diversion device comprising a pressing adjustment means (27) for pressing against a water stop plate (13f).