JP2000246088A - Apparatus for supplying liquid quantitatively - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply liquid quantitatively and continuously and to facilitate the control of the amount of the received liquid when the liquid stored in a storage tank is supplied quantitatively to the outside of the tank. SOLUTION: In an apparatus, a part 44(a) in the longitudinal direction of a discharge pipe 39 is inclined to be extended diagonally downward from the upstream side toward the downstream side. The other part 44(b) extending from the downstream side end of the part 44(a) toward a liquid discharge part 38 side is arranged below the part 44(a) and inclined. The parts 44(a), (b) are arranged to continue alternately and vertically over the entire length of the discharge pipe 39. The vertically adjoining parts 44(a), (b) are made to be able to separate from each other and to be able approach each other. A bias means for biasing the parts 44(a), (b) to approach each other is installed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supplying a liquid such as water or medicine stored in a storage tank at a constant flow rate toward the outside of the storage tank. Things.

[0002]

2. Description of the Related Art Conventionally, the above-mentioned liquid constant flow rate supply device has
There is one configured as follows.

That is, a float is provided which floats on the liquid surface of the liquid stored in the storage tank and is capable of moving up and down with the fluctuation of the liquid surface in the vertical direction. Attached to the float and partly opened in the liquid near the liquid surface, the other end side extends downward from the liquid introduction part side, and the other end is a liquid outlet part. A flexible outlet pipe is provided which opens to the outside of the storage tank and whose internal space serves as an outlet path.

According to the above-described liquid constant flow rate supply device, the float rises and falls according to the fluctuation of the liquid level in the storage tank, and the liquid introduction section of the outlet pipe rises and falls together with the float. The relative height of the opening of the liquid inlet with respect to is always kept substantially constant.

Therefore, the amount of liquid flowing into the outlet path through the opening of the liquid introduction section (here, the amount means the amount per unit time (eg, volume or weight / min),
(The same applies hereinafter) is also substantially constant, so that the amount of liquid to be led out through this outlet path is kept substantially constant. For this reason, a constant flow rate of the liquid is supplied to the outside of the storage tank, so that it is easy to quantitatively manage the liquid on the side receiving the liquid.

[0006]

However, in the above-mentioned prior art, the following problems may occur.

That is, when the liquid in the storage tank flows into the outlet through the opening of the liquid inlet, air on the liquid surface also flows into the outlet together with the liquid, and the outlet together with the liquid passes through the outlet. It flows toward the liquid outlet. For this reason, the air flowing in the outlet path gives buoyancy to a middle part in the longitudinal direction of the outlet pipe, whereby the middle part of the outlet pipe is bent so as to float upward, and this outlet pipe is bent. There is a possibility that the middle part will be at a higher position than the part on the upstream side.

Here, as described above, when the middle portion of the outlet pipe is bent upward, the middle portion is thereafter sufficiently filled with liquid and the weight of the liquid overcomes the buoyancy. As a result, the state in which the outlet pipe is bent as described above is maintained.

[0009] As described above, the liquid is sufficiently filled in the middle part of the outlet pipe, and the buoyancy is overcome.
Assuming that the outlet pipe is returned to the original inclined posture, immediately after that, the liquid that has been filled in the middle part is supplied to the outside of the storage tank through the outlet path at one time.

Therefore, according to the above-mentioned conventional technique, the liquid stored in the storage tank is supplied to the outside of the storage tank at a constant flow rate.
This may lead to discontinuity, which may hinder quantitative management of the liquid on the side receiving the supply.

The present invention has been made in view of the above-mentioned circumstances. When the liquid stored in the storage tank is supplied to the outside of the storage tank at a constant flow rate, the constant flow rate of the liquid is controlled. It is an object of the present invention to make the supply of the liquid continuous so that the quantity of the liquid can be more easily managed on the side receiving the supply.

[0012]

A constant flow rate liquid supply apparatus according to the present invention for solving the above problems is as follows.

According to the first aspect of the present invention, there is provided a float 33 floating on the liquid surface 32 of the liquid 16 stored in the storage tank 21 and capable of moving up and down with the fluctuation of the liquid surface 32 in the vertical direction. One end is a liquid introduction part 37, which is attached to the float 33 and opens into the liquid 16 near the liquid surface 32, and the other end extends downward from the liquid introduction part 37 side. A flexible outlet pipe 39 whose end is formed as a liquid outlet 38 and opens to the outside of the storage tank 21 and whose internal space is formed as an outlet 40 is provided.
In the liquid constant flow rate supply device, the upper liquid 16 of the liquid 16 stored in the storage tank 21 through 0 is led out of the storage tank 21.

A portion 44 (a) of the outlet pipe 39 in the longitudinal direction is inclined so as to extend obliquely downward from the upstream side to the downstream side.
The other portion 44 (b) extending from the downstream end of (a) toward the liquid outlet portion 38 is disposed below the portion 44 (a) and is in the inclined position, and the portion 44 (b) is inclined.
(A) and the other portion 44 (b) are arranged so as to be alternately continuous in the vertical direction over substantially the entire length of the outlet tube 39, and the two portions 44 (a) and (b) adjacent in the vertical direction are aligned in the vertical direction. The two parts 44 (a) can be separated from and approached to each other.
(B) is provided with an urging means for urging them to approach each other.

According to a second aspect of the present invention, in addition to the first aspect, a portion 44 (c) of the outlet pipe 39 at the most downstream end in the storage tank 21 is held in the inclined posture. A holding means 45 is provided.

The invention according to claim 3 is the invention according to claim 1 or 2
In addition to the above-mentioned invention, when the floats 33 are lowered, when the vertically adjacent portions 44 (a) and (b) approach each other more than a predetermined distance, the restricting means restricts the float 33 from further lowering. 46 are provided.

According to a fourth aspect of the present invention, in addition to the third aspect of the present invention, the restricting means 46 is positioned substantially at the center of gravity of the float 33 in plan view, and is located below the float 33 and at the liquid level 32. It protrudes downward.

[0018]

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

1 to 6, reference numeral 1 denotes a water purification device for purifying water. The water purification device 1 includes a concrete-made, metal, Or a filtration tank 4 made of resin.

The filter tank 4 is erected on the work surface 2 and has a bottomed filter tank body 5 whose upper end is open upward.
A lid 6 for opening and closing the upper end opening of the filtration tank main body 5 so as to be openable and closable; and a porous partition plate 7 provided at a lower portion of the filtration tank main body 5 to partition the inside of the filtration tank main body 5 up and down. The filter medium 3 is accommodated in the filter tank 4 above the partition plate 7. The upper part of the inside of the filtration tank 4 communicates with the outside, and the cavity at the upper end is always kept at the atmospheric pressure.

The filter medium 3 includes a sand 10 constituting an upper part of the filter medium 3 and a gravel 11 constituting a lower part. Of these 10, 11, the sand 10 has the smallest particle size, and the gravel 11 It is supposed that the particle size gradually increases from the upper part to the lower part. The upper surface 13 of the filter medium 3 is a flat surface formed by the upper surface of the sand 10 and extending substantially horizontally.

The upper part of the inside of the filter tank 4 adjacent to the upper surface 13 of the filter medium 3 is a liquid storage part 14. The liquid storage unit 14 is provided with a supply unit 17 capable of supplying a liquid 16 which is water of a stock solution to be treated from the upper side thereof. A pipe and a pump (not shown) for supplying the liquid 16 to the supply unit 17 from outside of the water purification device 1 are connected to each other. Further, the inside of the lower part of the filtration tank 4 below the partition plate 7 is used as another liquid storage part 18.

The liquid 16 supplied to the liquid storage section 14 of the filtration tank 4 through the supply section 17 passes through the filter medium 3 and the partition plate 7 from the liquid storage section 14 sequentially, and passes through the filtration tank 4. Is flowing toward the above-mentioned other liquid storage section 18 at the lower portion of.

In the water purifier 1, the liquid 16 that has passed through the filter medium 3 is stored, and the liquid 16 can be supplied in a substantially constant amount toward the next process downstream of the water purifier 1. A constant flow supply device 20 is provided. The constant flow rate supply device 20 includes a storage tank 21 made of concrete, metal, or resin capable of storing the liquid 16, and a pedestal 22 for supporting the storage tank 21 on the work surface 2. Is provided.

The storage tank 21 is erected on the work surface 2 via the gantry 22 and has a bottomed storage tank body 23 whose upper end is opened upward, and an upper end of the storage tank body 23. And a lid 24 for opening and closing the opening freely. The axial center 25 of the storage tank 21 extends substantially in the vertical direction, and the cross-sectional shape in plan view of each part in the axial direction has a circular shape whose inner diameters are substantially constant to each other, and the upper and lower ends are closed as a whole. It has a cylindrical shape. In addition,
The upper portion inside the storage tank 21 communicates with the outside, and the cavity at the upper end is always kept at the atmospheric pressure.

One end is connected to the lower part of the filtration tank 4,
Communication pipe 27 whose other end is connected to the lower part of storage tank 21
The interior of the communication pipe 27 is a communication passage 28 that allows the lower portion of the filtration tank 4 and the lower portion of the storage tank 21 to communicate with each other and allows the flow of the liquid 16. One end of the communication passage 28 opens at an intermediate portion in the vertical direction of the other liquid storage portion 18, and the opening at the other end of the communication passage 28 is located substantially on the axis 25 and substantially vertically upward. It opens toward the inside of the storage tank 21.

The constant flow rate supply device 20 includes a storage tank 21.
There is provided a float 33 floating on the liquid surface 32 of the liquid 16 stored in the storage tank 21 and capable of moving up and down along the axial direction of the storage tank 21 with the fluctuation of the liquid surface 32 in the vertical direction. This float 33 has a flat disk shape that is flat up and down,
There is a center of gravity on the axis, the axis is floated on the liquid surface 32 so that the axis is substantially vertical, and is positioned on the axis 25 by positioning means (not shown). The liquid surface 32 is positioned at an intermediate portion of the float 33 in the vertical direction.

The float 33 has a pair of upper and lower resin support plates 34, 34 constituting upper and lower surfaces thereof.
A resin float body 35 sandwiched between the support plates 34, 34 is provided, and these 34, 35 are connected to each other to form a unit product. The float 33 may be formed of a hollow box or a plurality of hollow spheres for a ball tap.

One end is a liquid inlet 37 and is attached to the float 33. The other end is a liquid inlet 37.
The other end extends from the side of
An outlet pipe 39 attached to the lower part of the storage tank 21 is provided. The internal space of the outlet pipe 39 serves as an outlet 40 extending from the liquid inlet 37 to the liquid outlet 38, and the opening 3 of the outlet 40 in the liquid inlet 37 is formed.
7a is a liquid level 3 of the liquid 16 in the storage tank 21 as a whole.
2, the opening 38a of the outlet 40 in the liquid outlet 38 is open to the outside of the storage tank 21.

The outlet path 40 is used to transfer the upper liquid 16 of the liquid 16 stored in the storage tank 21 to the storage tank 2.
1 outside the storage tank 21 and supplied to the next process outside the storage tank 21. The opening 38a of the liquid lead-out portion 38 is connected to some device or the like in the next process downstream of the water purification device 1.

Both the liquid introduction part 37 and the liquid discharge part 38 in the above-mentioned outlet pipe 39 are made of a rigid pipe material 4 made of resin.
2 molded. A middle portion in the longitudinal direction of the outlet pipe 39 from the liquid inlet 37 to the liquid outlet 38 is formed of a flexible tube 43 made of resin. The tube 43 has a spiral shape centered on the axis 25, and is approximately 360 ° of the tube 43 in a plan view of the constant flow rate supply device 20 of the water purification device 1 and one pitch in a side view. Each portion 44 constitutes a minute. These portions 44 are substantially the same in shape and size, are provided repeatedly and continuously in the vertical direction, and are integrally formed with each other.

2 and 3, at least a portion 44 (a) of each of the portions 44 in the longitudinal direction of the float main body 35 is viewed from the upstream side to the downstream side in the flow direction of the liquid 16 passing through the outlet passage 40. As it goes to the side, it is in an “inclination posture” that extends obliquely downward while drawing an arc in plan view. The other portion 44 (b) extending from the downstream end of the portion 44 (a) toward the liquid outlet portion 38 has the same shape and the same size as the portion 44 (a) and is disposed therebelow. The part 44 (a) and the other part 44 (b) are arranged so as to be alternately continuous in the vertical direction over substantially the entire length of the outlet tube 39. . That is, the other portion 44 described above
(B) and the lower portion 44 (a) have the same configuration as the above-described portion 44 (a) and other portion 44 (b).

In the outlet pipe 39, the two portions 44 (a) and (b) adjacent to each other in the vertical direction can be separated from and approach each other in the vertical direction.

Further, the two parts 44 (a) and (b) are kept in the "inclination posture" while the two parts 44 (a) and (b)
There is provided an urging means for elastically urging (b) to approach each other. The biasing means is constituted by the tube 43 having elasticity in itself, and the tube 43 has substantially equal elastic internal stresses in its respective portions. (B)
Parts 44 of the tube 43 so that
Are almost evenly biased. In this case, the outlet pipe 3
In a free state of the tube 43, the two portions 44 (a) and 44 (b) are brought close to each other and pressed against each other by the urging means so as to be vertically overlapped.

In FIGS. 1 and 2, as described above, both portions 44 (a) and (b) can be separated from and approach each other in the up-down direction, and the two portions 44 (a) and (b) are kept in the “tilted posture”. Since (a) and (b) are urged to approach each other, the float 33 rises together with the liquid level 32 of the storage tank 21, and accordingly, the liquid introduction part 37 of the outlet pipe 39 rises. In the tube 43 of the lead-out tube 39, the respective portions 44 are extended substantially equally in the vertical direction, and accordingly, the inclination angles of the respective portions 44 in the "inclination posture" are increased to substantially equal values. .

In FIG. 4, the liquid level 32 of the storage tank 21 is shown.
At the same time, when the float 33 descends to the low position and the liquid introduction part 37 of the above-mentioned outlet pipe 39 descends, the tube 43 of the outlet pipe 39 causes the respective parts 44 thereof to contract almost equally in the vertical direction. Accordingly, the inclination angles of the respective portions 44 in the “inclination posture” are reduced to values substantially equal to each other.

A holding means 45 is provided for holding the portion 44 (c) of the outlet pipe 39 at the bottom in the storage tank 21 so that the portion 44 (c) at the most downstream end of the outlet pipe 39 has the above-mentioned "inclination posture". Have been. The holding means 45 is attached to the bottom of the storage tank main body 23 of the storage tank 21, and holds the portion 44 (c) on the storage tank main body 23 side in such a manner that the portion 44 (c) is detachably engaged and held as described above.

As shown in FIG. 1 and FIG.
At the same time, the opening 37a of the liquid introduction part 37 of the outlet pipe 39 is
From a state of being higher than the upper surface 13 of the filter medium 3, the liquid introduction part 37 of the outlet pipe 39 descends together with the float 33, and the opening 37 a of the liquid introduction part 37 becomes as shown in FIG. When a predetermined height, which is almost the same height as the upper surface 13 of the filter medium 3, is reached, a regulating means 46 for regulating the float 33 from descending further is provided. In this case, the “predetermined height” means a position higher than the upper surface 13,
Any of the low positions may be used.

The regulating means 46 extends substantially vertically and penetrates vertically through the float 33 substantially vertically on its axis, is supported by the float 33, and is below the float 33 and at the liquid level of the liquid 16. 32 is provided with a pipe member 47 projecting downward and having a circular cross section.
When the opening 37a of the liquid introduction part 37 reaches the "predetermined height", the lower end side of the pipe member 47 comes into contact with the internal bottom surface, which is any part of the storage tank 21, as shown in FIG. As a result, further lowering of the float 33 is prevented, that is, further lowering of the opening 37a of the liquid introduction part 37 is prevented.

Therefore, the opening 37a of the liquid introduction section 37
The liquid 16 is prevented from flowing into the lead-out passage 40 through the flow path, and the liquid surface 32 is also substantially maintained at the “predetermined height”.

In the above case, at least a part of the liquid introduction part 37 constituting the upper end of the outlet pipe 39 is
7 is constituted by the upper part of this pipe material 47 which is at least a part of
The opening 37a of the liquid introduction part 37 is formed in the vicinity of the lower part of the above. The upper end of the pipe member 47 is located above the float 33 and opens toward the cavity above the float 33, that is, the pipe member 47 is
Is communicated with the cavity.

The pipe member 47 of the regulating means 46 is also provided.
Is located substantially on the center of gravity and axis of the float 33 in a plan view of the float 33, and protrudes downward from the float 33 and below the liquid level 32,
In addition, the specific gravity is larger than that of the liquid 16. For this reason, the pipe member 47 of the restricting means 46 acts as a weight of the float 33, so that the float 33 does not greatly incline with respect to the axis 25 on the liquid surface 32, and has a stable constant posture. It is said that it keeps floating.

As shown in FIG. 4, as the float 33 descends, both portions 44 of the tube 43 which are vertically adjacent to each other.
When (a) and (b) approach each other more than a predetermined distance with a slight gap in the vertical direction, the regulating means 46 comes into contact with the inner bottom surface of the storage tank 21 as described above, and The above descent is regulated.

In the above case, approaching beyond the predetermined interval includes a state in which the portion 44 (a) and the other portion 44 (b) are lightly contacted in the vertical direction and are vertically overlapped.

When the further lowering of the float 33 is restricted by the restricting means 46 as described above, the float 33 is set at the lowermost position. In this case, too, the elastic internal stress (biasing) of the tube 43 itself is also maintained. The two portions 44 (a) and (b) are urged to approach each other by the urging force of the means). In addition, as described above, the float 3
When 3 reaches the lowermost position, the biasing force may be substantially zero.

Another regulating means 51 having the same function as the regulating means 46 is provided. This regulating means 51
Is provided with a plurality of (three) stoppers 52 provided on the inner surface of the storage tank 21 in the middle part in the vertical direction and provided around the axis 25 as shown in FIG. Reaches a "predetermined height", the lower end surface of the float 33 comes into contact with the upper surface of the stopper 52, and the further lowering of the float 33 is prevented. Note that the other regulating means 51 may not be provided.

In FIGS. 1 and 3 to 6, the constant flow rate supply device 20 is provided with a variable opening degree of the opening 37 a of the liquid introduction part 37 so that the amount of the liquid 16 discharged through the discharge path 40 (the storage tank 21) is changed. Is provided with a flow rate adjusting means 55 capable of adjusting the amount of supply to the next step outside the device.

The opening 37a of the liquid introduction part 37 is provided with a plurality (3
And large, medium, and small holes 56 to 58 having different areas from each other.

The flow rate adjusting means 55 is fitted (fitted) to the pipe material 47 constituting the liquid introducing portion 37 on the same axis 60 as the pipe material 47. An adjusting pipe 61 having a circular cross section which is rotatable while sliding around an axis 60;
And an opening 62 formed to communicate the inside and outside of the adjusting pipe 61 and having a larger area than the large hole 56, and a handle attached to the upper end of the adjusting pipe 61 above the float 33 and the pipe member 47. The operation unit 63 is provided.

In the state indicated by the solid line and the two-dot chain line in FIGS.
By turning, the opening 62 of the adjustment pipe 61 is matched only with the small hole 58 of the opening 37 a, and the large hole 56 and the medium hole 57 are closed at the lower part of the adjustment pipe 61. For this reason, the amount of the liquid 16 flowing into the outlet 40 through the opening 37 a of the liquid inlet 37 is reduced, and the amount of the liquid 16 led out from the storage tank 21 by the outlet 40 is reduced. Has been adjusted.

In the state shown by the dashed line in FIGS. 3 and 6, the adjustment pipe 61 is rotated only by the operation of the operation section 63 so that the adjustment pipe 6 is formed only in the middle hole 57 of the opening 37 a.
One opening 62 is matched. For this reason, the amount of the liquid 16 that tends to flow into the outlet 40 through the opening 37 a of the liquid inlet 37 is slightly increased, and the amount of the liquid 16 that is led out of the storage tank 21 by the outlet 40 is slightly increased. It has been adjusted as follows.

The opening 37a is formed in the same manner as described above.
If the opening 62 of the adjustment pipe 61 is made to coincide with the large hole 56, the amount of the lead-out is adjusted to be further increased.

In the normal operation state of the water purification apparatus 1, the filtration tank 4 and the storage tank 21 are almost completely filled with the liquid 16, respectively, except for a slight cavity at the upper end inside thereof. The liquid 16 to be treated is supplied to the filtration tank 4 one after another. In this case, each of the cavities is always kept at the atmospheric pressure.

Here, as described above, the filter tank 4 and the storage tank 21 have their lower parts communicated with each other through the communication passage 28, and the liquid introduction part 37 of the outlet path 40 is connected to the upper surface of the filter medium 3. 13, the liquid surfaces 32 and 65 of the filtration tank 4 and the storage tank 21 are positioned at the same height, and the liquid surface 65 in the filtration tank 4 is filtered. The liquid 16 is stored in the liquid storage part 14 of the filtration tank 4 at a position higher than the upper surface 13 of the material 3.

As described above, when the liquid 16 is successively supplied to the liquid storage section 14 of the filtration tank 4, the liquid storage section 14
The liquid 16 stored in the filter medium 3 is forced to pass through the filter medium 3 at the liquid pressure and head toward the lower part of the filter tank 4. At this time, microorganisms particularly in the vicinity of the upper surface 13 of the filter medium 3 It is supposed to be propagated, and the microorganism 16 purifies the liquid 16.

When the liquid 16 passes through the filter medium 3, the biological treatment proceeds inside the filter medium 3, and the suspended matter mixed in the liquid 16 is captured by the filter medium 3. Thus, the liquid 16 is further purified.

Next, the liquid 16 purified as described above is used.
Is made to flow into the lower part of the storage tank 21 through the communication passage 28 and rises inside the storage tank 21. At this time, suspended matter and sludge remaining in the liquid 16 settle and separate on the inner bottom of the storage tank 21, and the liquid 16 is further purified.

Here, the liquid level 32 of the liquid 16 in the storage tank 21 rises with the supply of the liquid 16 to the filtration tank 4, but as described above, the liquid level in the storage tank 21 increases. The float 33 moves up and down in accordance with the fluctuation of the surface 32, and the liquid introduction portion 37 of the outlet pipe 39 moves up and down together with the float 33. Therefore, the relative position of the opening 37 a of the liquid introduction portion 37 to the liquid surface 32 in the storage tank 21. Height is always kept almost constant.

Therefore, the amount of the liquid 16 flowing into the outlet 40 through the opening 37a of the liquid inlet 37 is also substantially constant.
Even if the supply amount of the liquid fluctuates or the filter medium 3 or the communication path 28 is clogged, the liquid 1
6 is kept almost constant, that is, the supply amount of the liquid 16 to the next process outside the storage tank 21 at the downstream side of the water purification device 1 is set to a substantially constant constant flow rate. It is easy to quantitatively manage the liquid 16 on the side where the liquid 16 is supplied.

Further, as described above, the portion 44 (a) in the longitudinal direction of the outlet pipe 39 is inclined obliquely downward and extends from the upstream side to the downstream side. The other portion 44 (b) extending from the downstream end toward the liquid outlet portion 38 is connected to the portion 4
4 (a) and the above-mentioned inclined posture,
The part 44 (a) and the other part 44 (b) are arranged so as to be alternately continuous in the vertical direction over substantially the entire length of the outlet pipe 39, and both parts 44 (a) (b) adjacent in the vertical direction
Are provided so as to be able to move away from each other and to approach each other in the vertical direction, and to urge each of the portions 44 (a) and 44 (b) toward each other.

That is, as described above, regardless of the height of the float 33 and the liquid inlet 37 of the outlet pipe 39 in the storage tank 21, the liquid flows from the liquid inlet 37 of the outlet 40. Each part reaching the lead-out part 38 is maintained in the “tilted posture” in which the front part is inclined forward and downward in the direction from the liquid introduction part 37 to the liquid lead-out part 38.

Therefore, in the storage tank 21, the liquid 16 flowing into the outlet 40 through the opening 37 a of the liquid inlet 37 is allowed to flow down the outlet 40 without stagnation. At this time, the air on the liquid surface 32 together with the liquid 16 is caused to flow from the liquid introduction portion 37 into the outlet passage 40, and the air gives buoyancy to a middle portion in the longitudinal direction of the outlet pipe 39. Even if the outlet tube 39 is to be bent, each portion 44 of the outlet tube 39 is urged by the above-mentioned urging means, and is kept in the above-mentioned "inclination posture".

Therefore, the liquid 16 in the outlet 40
Is maintained, and the liquid 16 is continuously led out of the storage tank 21 through the liquid lead-out part 38. Therefore, the liquid 16 stored in the storage tank 21 is removed from the storage tank 21. When supplying at a constant flow rate to the outside,
The supply of the constant flow rate is continuously performed, and it becomes easy to quantitatively manage the liquid 16 on the side receiving the supply.

Further, as described above, the outlet pipe 39 is
The float 33 floating on the liquid surface 32 of the storage tank 21 is connected to the lower side of the storage tank 21, and a part 44 (a) and another part 44 (b) of the outlet pipe 39 are formed. ) Are urged to be adjacent to each other in the vertical direction and approach each other.

Therefore, the float 33 is urged through the outlet pipe 39 toward the liquid outlet 38 of the outlet pipe 39 at the lower side of the storage tank 21.
The float 33 is positioned at a predetermined position in the horizontal direction on the liquid surface 32, whereby the float 3
3 is prevented from freely moving on the liquid surface 32 and inadvertently coming into contact with the inner surface of the storage tank 21 and inclining at the time of ascending and descending,
The float 33 floats on the liquid surface 32 while maintaining a stable and constant posture.

Therefore, even when the float 33 moves up and down, the float 33 maintains a constant posture.
Accordingly, the posture of each part 44 of the outlet pipe 39 is also maintained at the “inclination posture”.
When the liquid 16 stored in the storage tank 1 is supplied at a constant flow rate toward the outside of the storage tank 21, the supply of the constant flow rate is reliably performed continuously, and the amount of the liquid 16 on the side receiving the supply is ensured. Management becomes easier.

Further, as described above, the portion 44 (c) at the most downstream end of the outlet pipe 39 inside the storage tank 21.
Holding means 45 for holding the “tilt posture”
Is provided.

Therefore, together with the liquid level 32, the float 3
3 is lowered to the low position, the tube 43 of the outlet pipe 39 is contracted, and the above-mentioned most downstream end portion 44 (c)
However, even if it is pressed by the portion 44 of the tube 43 above it, the position of the above-mentioned portion 44 (c) is maintained in the “tilted position”.

Accordingly, the liquid 16 flowing down the outlet passage 40 is led out of the reservoir 21 through the portion 44 (c) and the liquid outlet 38 without stagnation. For this reason, when the liquid 16 stored in the storage tank 21 is supplied at a constant flow rate toward the outside of the storage tank 21,
The supply of the constant flow rate is performed more reliably and continuously, and the quantitative control of the liquid 16 on the side receiving the supply is more easily ensured.

Also, as described above, the upper surface 1
When the liquid introduction part 37 of the outlet pipe 39 descends together with the float 33 from a position higher than 3 and the opening 37a of the liquid introduction part 37 reaches almost the same height as the upper surface 13 of the filter medium 3, Restriction means 46 and 51 for restricting the float 33 from further lowering are provided.

For this reason, if the liquid 1
6 is changed so that the supply amount of the storage tank 21 decreases.
Assuming that the liquid 16 is continuously drawn out through the outlet path 40, the liquid level 32 of the storage tank 21 is lowered, and this liquid level 3
2 tends to be lower than the upper surface 13 of the filter medium 3, but this is prevented by the restricting means 46, 51, so that the liquid level 65 of the filter tank 4 becomes lower than that of the filter medium 3. The position lower than the upper surface 13 is suppressed.

Therefore, during the operation of the water purification device 1, the supply of the liquid 16 to the upper surface 13 of the filter medium 3 becomes insufficient and the filter medium 3
Drying of the portion in the vicinity of the upper surface 13 is suppressed, and it is possible to prevent the microorganisms that have propagated particularly effectively in the vicinity of the upper surface 13 from being killed. For this reason, if the liquid level 65 rises and the liquid 16 is stored in the liquid storage part 14 by the subsequent supply of the liquid 16 to the filtration tank 4, the liquid 16 forcibly removes the filter medium 3 by the liquid pressure. To the lower part of the filtration tank 4.

As a result, the purification of the liquid 16 by the water purifier 1 is achieved without paying attention to the height of the liquid surface 65 of the filtration tank 4 with respect to the upper surface 13 of the filtration material 3 by providing the above-mentioned regulating means 46 and 51. Water purification device 1
Can be easily performed.

In addition, in the above case, when the two vertically adjacent parts 44 (a) and (b) approach each other at a predetermined gap or more with a slight gap in the vertical direction as the float 33 descends, A restricting means 46 is provided for restricting the further downward movement of 33.

For this reason, when the float 33 is set to the lowermost position due to the above-described lowering regulation, the portions 44 of the outlet pipe 39 come into pressure contact with each other with a large force and may be bent inadvertently. Thus, each portion 44 of the outlet pipe 39 is maintained in the “inclination posture”.

Therefore, even when the float 33 is at the lowermost position as described above, when the liquid 16 stored in the storage tank 21 is supplied at a constant flow rate to the outside of the storage tank 21, The supply of the constant flow rate is performed more reliably and continuously, and the quantitative control of the liquid 16 on the receiving side is further facilitated.

As described above, the restricting means 46 and the flow rate adjusting means 55 are located substantially at the center of gravity of the float 33 in plan view, and the restricting means 46 is positioned below the float 33 and It is projected below the surface 32.

Therefore, in particular, the restricting means 46 functions as a weight of the float 33, and this float 3
3 floats on the liquid surface 32 of the storage tank 21 while maintaining a stable and constant posture.

Therefore, even when the float 33 moves up and down, the float 33 maintains a constant posture.
Accordingly, the posture of each part 44 of the outlet pipe 39 is also maintained at the “inclination posture”.
When the liquid 16 stored in the storage tank 1 is supplied to the outside of the storage tank 21 at a constant flow rate, the supply of the constant flow rate is performed more reliably and continuously, and the liquid 16 on the receiving side is supplied.
Is more easily managed.

As described above, the entire opening 37 a of the liquid introducing portion 37 of the outlet pipe 39 is located below the liquid surface 32.

For this reason, even if dust enters the storage tank 21 and floats on the liquid surface 32,
Such dust is prevented from flowing into the outlet 40 through the opening 37a of the liquid inlet 37.

Accordingly, the purification of the liquid 16 by the water purification device 1 is more reliably achieved, and the management of the liquid 16 on the side where the liquid 16 is supplied outside the storage tank 21 is further facilitated.

Although the above description is based on the illustrated example, the liquid 16
May be a drug. Further, the filtration tank body 5 of the filtration tank 4, the storage tank body 23 of the storage tank 21, and the float 33
May be rectangular as well as circular in plan view.

FIG. 7 shows another embodiment.

According to this, each part 44 in the middle part in the longitudinal direction of the lead-out pipe 39 is formed of a resin pipe material having a circular cross section and extending linearly, and the part 44 (a) is formed.
And the upstream end of the other portion 44 (b) extending from the downstream end toward the liquid outlet portion 38 side is connected to each other by a bellows-shaped rectangular connecting pipe 67 having flexibility and elasticity. The connecting pipe 67, which has an elastic force itself, constitutes the urging means.

The other constructions and operations are the same as those of the above-described embodiment.

[0087]

The effects of the present invention are as follows.

According to the first aspect of the present invention, there is provided a float floating on the liquid surface of the liquid stored in the storage tank so as to be able to ascend and descend together with the fluctuation of the liquid level in the vertical direction. And attached to the float and opened into the liquid near the liquid surface, the other end side extends downward from the liquid introduction part side and the other end is a liquid outlet part. A flexible outlet pipe is provided which opens to the outside of the storage tank and whose internal space is used as an outlet path, and the upper liquid of the liquid stored in the storage tank is led out of the storage tank through the outlet path. In the constant flow rate supply device for the liquid

A part of the outlet pipe in the longitudinal direction is inclined so as to extend obliquely downward from the upstream side to the downstream side, and another part extending from the downstream end of the part toward the liquid outlet side. Is disposed below the part and has the inclined posture, and the part and the other part are disposed so as to be alternately continuous in the vertical direction over substantially the entire length of the outlet pipe, and both parts adjacent in the vertical direction are disposed. There is provided an urging means which is capable of moving away from and approaching each other in the vertical direction, and urging the two parts so as to approach each other.

That is, as described above, regardless of the height of the float and the liquid introduction section of the outlet pipe in the storage tank, each section from the liquid introduction section to the liquid outlet section of the outlet path is required. The inclined posture which is inclined forward and downward in the direction from the liquid introduction section to the liquid discharge section is maintained.

Therefore, in the storage tank, the liquid that has flowed into the outlet channel through the opening of the liquid inlet is allowed to flow down the outlet channel without stagnation. Further, at this time, air on the liquid surface together with the liquid is caused to flow from the liquid introduction section into the lead-out path, and the air gives buoyancy to a middle part in the longitudinal direction of the lead-out pipe to bend the lead-out pipe. Even if this is not the case, the outlet pipe is urged by the above-mentioned urging means so as to maintain the above-mentioned "inclination posture".

[0092] Therefore, the steady flow of the liquid in the outlet path is maintained, and the liquid is continuously discharged to the outside of the storage tank through the liquid outlet, so that the liquid stored in the storage tank is discharged. In the case where the liquid is supplied to the outside of the storage tank at a constant flow rate, the supply of the constant flow rate is continuously performed, and the quantity of the liquid on the receiving side can be easily managed.

Further, as described above, the outlet pipe is for connecting the float floating on the liquid surface of the storage tank to the lower side of the storage tank, and is connected to a part of the outlet pipe. Other portions are urged to be adjacent to each other in the vertical direction and to approach each other.

Therefore, the float is urged through the outlet pipe toward the liquid outlet side of the outlet pipe at the lower side of the storage tank, so that the float is moved in the horizontal direction at the liquid level. The float is positioned at a predetermined position, thereby preventing the float from freely moving on the liquid surface, inadvertently coming into contact with the inner surface of the storage tank and inclining at the time of ascending and descending. It will float while maintaining the posture of.

Therefore, even when the float moves up and down, the float keeps a constant posture, and accordingly, the posture of each part of the outlet pipe is also maintained at the "inclination posture". When the liquid stored in the storage tank is supplied at a constant flow rate toward the outside of the storage tank, the supply of the constant flow rate is reliably and continuously performed, and the quantitative Management becomes easier to ensure.

Further, the invention of claim 2 is provided with a holding means 45 for holding a portion on the most downstream end side of the outlet pipe in the storage tank so as to be in the inclined posture.

For this reason, the float descends to the low position together with the liquid level, and the tube of the outlet pipe is contracted, and the above-mentioned most downstream end portion is temporarily pressed by the above-mentioned tube portion. Even if it is, the posture of the above-mentioned portion is maintained as the inclined posture.

Therefore, the liquid that has flowed down the outlet path is led out of the storage tank through the portion and the liquid outlet without stagnation. For this reason, when the liquid stored in the storage tank is supplied at a constant flow rate toward the outside of the storage tank, the supply of the constant flow rate is more reliably and continuously performed, and the liquid on the receiving side is supplied. Quantitative management becomes easier.

According to a third aspect of the present invention, there is provided a restricting means for restricting the float from descending further when the two vertically adjacent portions approach each other more than a predetermined distance in the vertical direction as the float descends. It is.

Therefore, when the float is set to the lowermost position by the above-described regulation of the descent, it is prevented that the respective portions of the outlet pipe are pressed against each other with a large force and are inadvertently bent, Each part of the outlet pipe is held in an inclined posture.

Therefore, even when the float is at the lowermost position as described above, when the liquid stored in the storage tank is supplied to the outside of the storage tank at a constant flow rate, the supply of the liquid at the constant flow rate is performed. Is more reliably and continuously performed, and the quantity management of the liquid on the side to be supplied becomes easier.

According to a fourth aspect of the present invention, the restricting means is positioned substantially at the center of gravity of the float in plan view, and protrudes downward from the float and below the liquid level.

For this reason, the regulating means functions as a weight of the float, and the float floats on the liquid surface of the storage tank while maintaining a stable and constant posture.

Therefore, even when the float moves up and down, the float keeps a constant posture, and accordingly, the posture of each part of the outlet pipe is also maintained at the inclined posture. When the liquid stored in the tank is supplied to the outside of the storage tank at a constant flow rate, the supply of the constant flow rate is more reliably and continuously performed, and the quantitative amount of the liquid on the receiving side is increased. Management becomes easier and more reliable.

[Brief description of the drawings]

FIG. 1 is an overall side sectional view of a water purification device.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a plan sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is an operation explanatory view corresponding to FIG. 2;

FIG. 5 is a partially enlarged sectional view of FIG. 1;

FIG. 6 is a sectional view taken along line 6-6 of FIG. 5;

FIG. 7 is a view showing another embodiment and corresponding to FIG. 2;

[Explanation of symbols]

 Reference Signs List 16 liquid 20 constant flow rate supply device 21 storage tank 32 liquid level 33 float 37 liquid inlet 37a opening 38 liquid outlet 38a opening 39 outlet pipe 40 outlet path 44 part 45 holding means 46 restricting means

Claims (4)

[Claims] 1. A float floated on a liquid surface of a liquid stored in a storage tank and capable of ascending and descending along with the fluctuation of the liquid surface in a vertical direction, one end of which is a liquid introducing portion. Attached to the float and opened in the liquid near the liquid surface, the other end extends downward from the liquid introduction part side and the other end is a liquid outlet and is outside the storage tank. A liquid which is provided with a flexible outlet pipe having an opening and an internal space serving as an outlet path, and allowing the upper liquid in the liquid stored in the storage tank to be led out of the storage tank through the outlet path. In the constant flow rate supply device, a part of the outlet pipe in the longitudinal direction has an inclined posture extending obliquely downward from the upstream side to the downstream side, and is directed from the downstream end of the part toward the liquid outlet part side. Extend the other part And the above-mentioned inclined position, the above-mentioned part and the other part are arranged so as to be alternately continuous in the up-down direction over substantially the entire length of the outlet pipe, and both vertically adjacent parts are arranged in the up-down direction. A constant flow rate supply device for a liquid, comprising: urging means for allowing the two parts to move away from each other and approach each other, and for urging the two parts to approach each other. 2. The constant flow rate liquid supply device according to claim 1, further comprising a holding means for holding a portion on the most downstream end side of the outlet pipe in the storage tank so as to have the inclined posture. 3. The device according to claim 1, further comprising a restricting means for restricting the further lowering of the float when both vertically adjacent parts approach each other more than a predetermined distance with the lowering of the float. A constant flow rate supply device for the liquid described in the above. 4. The constant flow rate supply of liquid according to claim 3, wherein the restricting means is positioned substantially at the center of gravity of the float in plan view, and protrudes downward from the float and below the liquid surface. apparatus.