JP3357838B2 - Energy dissipating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure reducing device for guiding pressurized water from a water storage dam or the like into a water storage tank, where the water is reduced and discharged.

[0002]

2. Description of the Related Art In an agricultural pipeline that uses water for agriculture by attenuating water at a water source such as a water storage dam, a pressure regulating facility (attenuated water tank) is arranged in the pipeline to control the water level of the pressure regulating facility. Equipment to keep it constant is needed.

[0003] Japanese Patent Publication No. Sho 63-9824 can be cited as a conventional pressure regulating facility of this type (water-reducing tank). This basic structure is configured to open and close the valve body at the end of the water pipe through a lever and a valve rod by a float that moves up and down in the float chamber in the water tank due to fluctuations in the water level in the water tank.

That is, in FIG. 5, 21 is a water tank,
Numeral 22 designates a headrace pipe led from a water storage dam or the like (not shown).
Reference numeral 3 denotes a valve seat provided at an open end of the water pipe upward, 24 denotes a valve body, 2
5 is a valve rod, 26 is a cross beam erected between the side walls of the water storage tank 21, 27 is an opening / closing lever, 28 is a support base for the opening / closing lever,
The opening / closing lever 27 is mounted on the horizontal girder 26 via a horizontal shaft 29 so as to be swingable. At the end of the opening / closing lever 27, the upper end of the valve rod 25 is pivotally mounted via a horizontal pin 30 parallel to the horizontal shaft 29. At the other end of the opening / closing lever 27, the upper end of the float hanging rod 31 is horizontal. It is pivotally connected via a pin 32. Reference numeral 33 denotes a float chamber, which is provided near the water pipe 22 in the water storage tank 21 and has a communication port 34.
The water is communicated with the water storage tank 21 via the. 3
Reference numeral 5 denotes a float, which is connected to the lower end of the float hanging rod 31 via a horizontal pin 36, and moves up and down within a predetermined water level range in the float chamber 33 due to fluctuations in the water level.

[0005]

However, in the case of the above structure, the water pipe 22, the float 35, and the float chamber 33 are arranged side by side in the water storage tank 21, and the opening / closing lever 27 is directly moved by the vertical movement of the float 35. Through the water pipe 22
The opening and closing of the valve body 24 of the water tank 2 requires the opening and closing lever 27 connecting the float 35 and the valve body 24.
The size of 1 is decided and it becomes a big water tank.

Further, since only the water level (head) of the water storage tank 21 is used to reduce the energy of the water, the water storage tank 21 has a low deenergization efficiency and requires a large water storage tank. .

An object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to provide a deenergizing device having a large deenergizing effect while reducing the size of the deenergizing water tank.

[0008]

In order to achieve the above-mentioned object, a deenergizing apparatus according to the present invention guides pressurized water from an upstream side into a deenergized water tank via a water pipe, and in the deenergized water tank. In a deenergization device, which is deenergized and flows out from an intake port to a downstream side, a ball tap which guides the water guide pipe into the depletion water tank and operates an end of the water tap according to a change in water level in the depletion water tank. And the ball tap is opened downward by the ball tap, and the water level in the water reducing tank is opened due to a decrease in the maximum set water level, so that the pressurized water flows through the water guide pipe.

With this configuration, normally, the pressurized water flowing from the water source via the water pipe is cut off by the ball tap. From this state, when the water is discharged (discharged) to the downstream side and the water level of the water tank falls from the highest set water level (HWL) to the lowest set water level (LWL), the ball tap opens,
The water pipe is opened. For this reason, the pressurized water flows out toward the bottom surface of the depressurized water tank via the water guide pipe, and is discharged radially radially to be deenergized. In addition, the energy is also reduced by the upper water level (head), and the reduced water is discharged downstream from the intake port.

When the discharge from the water intake is stopped and the water level reaches the maximum set water level, the ball tap is closed, the water pipe is shut off, and the discharge (inflow) into the water tank is stopped. The above operation is repeated, and the water level is kept constant while the energy is reduced.

In the above configuration, a deenergizing cylinder with a deflector is provided at the center of the deenergizing water tank at the same axis as the deenergizing water tank, and a water pipe is guided to the deenergizing pipe. After the discharge becomes circumferentially radial, it collides with the inner wall of the energy-reducing cylinder and the deflector, so that a high energy-reducing effect can be obtained, and the size of the energy-reducing water tank can be reduced. At this time, if the deflector is made up of a plurality of lower deflectors and an upper deflector, and the upper deflector is located between the lower deflectors, the water flow passing between the lower deflectors collides with the upper deflector and is attenuated. . By the way, the lower deflector is provided continuously around the entire inner surface of the energy-reducing cylinder,
If water is not allowed to pass through the deflector, the water flow will flow only inside, and a pressure pool will be generated, resulting in poor deenergization effect.

If a water intake cylinder is erected at the water intake and the water is taken in from the upper part of the water-reducing tank, the pressure water from the water pipe is not short-circuited and flows out. Can take water.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

Numeral 1 denotes a damping water tank, which comprises a cylindrical (or square tube) -shaped main body 1a having a predetermined diameter and height, which constitutes an outer shell, a bottom plate 1b, and a canopy 1c. 1e is opening 1d of canopy 1c
Close the lid.

Reference numeral 2 denotes an energy-reducing cylinder disposed substantially on the same axis as the cylindrical main body 1a. The energy-reducing cylinder 2 has a smaller diameter and a lower height than the size (diameter and height) of the cylindrical main body 1a. In particular, the height is the minimum setting water level (LWL) of the water tank water level described later
It is set even lower. A plurality of lower deflectors 2a are provided on the inner surface of the inner wall of the energy-reducing cylinder 2 with a predetermined gap in the circumferential direction, and an upper deflector 2b is provided above the gap. The deflectors 2a and 2b are provided with reinforcing ribs 2c at both ends of a horizontal arc-shaped plate.

Reference numeral 3 denotes a water pipe 3 for guiding upstream water to the water-reducing water tank 1.
One end is open to a reservoir (not shown), the other end penetrates the cylindrical body 1a and the energy-reducing cylinder 2, a ball tap 4 is connected to an end, a discharge pipe 5 is connected, and a lower end is connected. An opening 5a is made toward the bottom plate 1b. The opening 5a is concentric with the energy-reducing cylinder 2 and has a predetermined space between the opening 5a and the bottom plate 1b.

Reference numeral 6 denotes a truncated conical cone provided on the bottom plate concentrically and opposite to the opening 5a. A support member 7 standing in a cruciform shape is fitted into the cone 6 and inserted into the discharge pipe 5. Shake is prevented (see FIG. 4).

Reference numeral 8 denotes a water intake, and a water intake cylinder 9 is erected above the water intake. The position of the inflow port 9a above the water intake cylinder 9 is at least the lowest set water level (LW.
L).

As shown in FIG. 3, the ball tap 4 has a valve body 4d having an inlet 4a, an outlet 4b, and a valve port 4c.
A valve body 4f having a valve rod 4e, a lever group 4i to 4m for raising and lowering the valve body 4f, a rod 4g attached to the end of the lever group, and a float 4h attached to the tip of the rod 4g. Become. The lever group is sequentially connected to a bracket 4i provided on the valve body 4c by pins via a first lever 4j, a second lever 4k, and a third lever 4m. In the vicinity of the base end of the rod 4g, a support pin 4n
Supported via p. The valve stem 4e penetrates the valve body 4d, and the upper end is connected to the second lever 4k via the connection pin 4q. The float 4h is located on the water surface in the water tank 1 as in normal use, and follows the fluctuation of the water surface, that is, the water level of the water tank 1.

That is, when the water level of the water tank 1 of the float 4h is at the highest set water level (HWL), the valve element 4f of the ball tap 4 is closed (solid state in FIG. 3). The valve element 4f is released (the state shown by the chain line in the figure), and the water level of the water tank 1 is again set to the maximum set water level (HW.
Until L), the valve element 4f is released.

Reference numeral 10 denotes a guide plate for the float 4h, which is disposed on the back side and the front side (not shown) in FIG. 1 with the float 4h interposed therebetween. In addition, the upper part of the float chamber 10 is located above the highest set water level (HWL) of the water tank 1 so as not to be affected by the ripple of the water surface.

This embodiment is configured as described above. Next, the operation will be described. When there is no water intake from the water intake port 8, the ball tap 4 is shut off and the ball tap 4 is in the "closed" state.
There is no inflow from the water pipe 3 into the water tank 1. Therefore, the water level in the water tank 1 is maintained at the highest set water level. That is, since the ball tap 4 has the float 4h at the uppermost position and the valve port 4c pressed against the valve port 4c to be in the "closed" state, water does not flow out from the outlet 4b.

In this state, when water is taken from the water inlet 8, the water level in the water tank 1 drops from the maximum set water level, so that the ball tap 4 becomes “open”, and the pressure water flows from the water pipe 3 into the water tank 1. Begin to.

That is, as the water level in the water tank 1 decreases from the maximum set water level, the float 4h lowers. As a result, the lever group rotates, and the valve element 4f is moved through the valve rod 4e.
Is separated from the valve port 4c, so that the pressurized water in the water guide pipe 3 flows from the outlet 4b of the ball tap 4 through the discharge pipe 5 to the energy-reducing cylinder 2.
The water is discharged circumferentially by the cone 4 and collides with the inner wall of the energy-reducing cylinder 2 and the deflectors 2a and 2b to be energy-reduced.

At this time, the pressure water that has collided with the lower deflector 2a tends to generate a dead space, that is, a pressure pool, due to the subsequent pressure water below the lower deflector 2a. However, the pressure water in the pressure reservoir flows upward from the gap between the adjacent lower deflectors 2a, and the occurrence of the pressure reservoir is prevented beforehand, and the collision with the inner wall of the energy reduction cylinder 2 and the lower deflector 2a is prevented. It is performed reliably, and the energy dissipation effect is not impaired.

On the other hand, the upward water flow from the gap between the lower deflectors 2a collides with the upper deflector 2b and is deenergized. The energy is also reduced by the upper water level (head). In particular, since the water level in this case is a distance from the opening 5a provided near the bottom plate 1b to the water surface, the water-dissipating effect thereby is large. The deenergized water is discharged downstream from the intake port 8.

In the above-described embodiment, the deflectors 2a and 2b are provided on the energy-reducing cylinder 2. However, when the diameter of the water tank 1 is small, the energy-reducing cylinder 2 is omitted and the deflector 2 is directly provided on the inner wall of the water tank 1. It can also be used to achieve the desired energy reduction effect. In this case, the water inlet 8 and the water intake tube 9 are provided inside so as not to interfere with the deflector.

[0028]

As is apparent from the above description, according to the present invention, the above-mentioned water guide pipe is guided into the energy-reducing water tank,
The ball tap is opened downward by interposing a ball tap operated by the fluctuation of the water level in the water tank, and the ball tap is opened by lowering the water level in the water tank in the highest setting water level, Since the pressurized water flows through the water pipe, the volume of the deenergized water tank is 1/2 to 1/3 of that of the conventional one having a large float chamber for directly opening and closing the valve. Can be made much more compact.

Further, if the pressurized water is caused to collide with the deenergizing cylinder provided in the deenergizing water tank, a large deenergizing effect can be exhibited, and the deenergizing effect by the water level (head) can be improved. .

Further, since the water pipe is opened and closed by the ball tap, no commercial power supply is required, and energy saving and no maintenance cost are required.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a cut-off water tank according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of the embodiment;

FIG. 3 is an enlarged sectional view of a ball tap portion of the embodiment.

FIG. 4 is a sectional view of the end of the water pipe according to the embodiment.

FIG. 5 is a schematic diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 energy-reducing water tank 1a cylindrical main body 2 energy-reducing cylinder 2a lower deflector 2b upper deflector 3 water pipe 4 ball tap 4h float 6 cone 8 water intake 9 water intake cylinder

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E02B 11/00 F16K 31/18

Claims (3)

(57) [Claims] 1. A pressure reducing water is introduced from an upstream side into a water-reducing water tank 1 through a water pipe 3, and is de-energized in the water-reducing water tank 1 so as to flow out from an intake 5 to a downstream side. In the force-reducing device, a force-reducing device having a deflector at the center of the bottom surface in the water-reducing water tank 1
The cylinder 2 is provided on the same axis as the energy-reducing water tank 1, and
The water guide pipe 3 is guided to the heart , and the end thereof is opened downward through a ball tap 4 that is activated by a change in the water level in the water tank 1, so that the ball tap 4 is located inside the water tank 1. The energy dissipation device characterized in that the water level is opened by lowering of the maximum set water level, so that the pressurized water flows through the water pipe 3. 2. The energy dissipation device according to claim 1 , wherein the deflector comprises a plurality of lower deflectors 2a and an upper deflector 2b, and the upper deflector 2b is located between the lower deflectors 2a. 3. A de-energized device according to claim 1 or 2, characterized in that erected a water bottle body 6 taken in the intake 5.