JP2002001324A - Device for sampling surface layer liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for sampling surface layer liquid which can automatically follow the fluctuation of liquid level in a tank, is simple in structure and is excellent in reliability. SOLUTION: This device for sampling the surface layer of liquid in the tank T is provided with a cylindrical partition part 1 which is disposed in the tank T, a base part 2 which closes an open surface of lower end side of the partition part 1, an annular float part 3 which has at least the lower end side stored in the partition part 1 so as to be movable with respect to the partition part 1 and has holes 3a and a pump 4 (liquid discharging means) which is connected with a liquid collection space S which is surrounded by the partition part 1, the base part 2 and the float part 3, in the state of being immersed in the liquid in the chamber T. In addition, this device for picking surface layer liquid is constituted in such a manner that the upper end of the float part 3 is immersed in the liquid in the tank T when the pump 4 is operated, and the surface layer of the liquid in the tank T is introduced into a liquid collection space S through holes 3a of the float part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for collecting (continuously collecting) a surface liquid of stored wastewater from a treatment tank for temporarily storing wastewater from a kitchen of a restaurant, for example. .

[0002]

The wastewater from the kitchen of a restaurant or the like contains a large amount of oil, and cannot be flowed to the sewer as it is. Therefore, in general, wastewater is temporarily stored in a treatment tank called a grease trap, and the wastewater is separated into moisture and oil using a specific gravity difference.
Only water is discharged into the sewer.

[0003] When a certain amount or more of oil accumulates in the treatment tank, the treatment tank cannot perform its original function. That is, oil instead of moisture comes out from the drain port provided at a middle height of the processing tank side wall. Therefore, it is necessary to remove the oil (surface liquid) accumulated in the processing tank periodically, specifically, about several times a day.

Conventionally, removal of the surface liquid from the processing tank has
It has been done manually. However, such work requires hard work in a very poor environment,
Immediate improvement was required.

In recent years, in view of the current situation, an apparatus has been developed in which the above-mentioned surface liquid removing operation is automated. This apparatus generally includes a suction port immersed in wastewater in a processing tank, and a pump for sucking a surface liquid in the processing tank through the suction port.

[0006] Of these, in particular, the suction port is installed in the treatment tank so that the opening surface thereof is located slightly below the water surface of the wastewater so that only the surface liquid of the wastewater can be sucked. . Therefore, during the operation of the above apparatus, the surface liquid of the wastewater in the treatment tank is continuously collected from the suction port and discharged out of the tank. As a result, the oil does not accumulate in the treatment tank and is released from severe surface liquid removal work.

However, the water level in the treatment tank (the height of the water surface)
Is not always constant. For example, when a large amount of wastewater flows at once, the water level may rise rapidly by about several cm, and sometimes by about 10 cm. In such a situation, it is naturally impossible to collect the surface liquid using the above-mentioned device.

Therefore, when the above-mentioned apparatus is adopted, it is necessary to change the position of the suction port every time the water level changes so that only the surface liquid of the drainage can be collected at all times. That is, it is necessary to quickly and manually adjust the height of the opening portion of the mouth portion immersed in the drainage so as to be ideal. However, since the water level in the treatment tank fluctuates frequently, it is very inconvenient and inefficient to adjust the position of the suction port every time.

In order to solve such a problem, there has been proposed an apparatus in which the height position adjustment of the mouthpiece is completely automated. In general, this device has a sensor that detects the water level and an elevating mechanism that automatically displaces the mouthpiece in the vertical direction in response to a command from this sensor, in addition to the device described above. It was done.

Certainly, if this apparatus is used, the above-mentioned inconvenience is solved, and the surface liquid in the processing tank can be collected very efficiently. However, on the other hand, the structure is very complicated, so that troubles are likely to occur, and there is a problem in reliability.

Therefore, an object of the present invention is to provide a surface liquid collecting apparatus which can automatically follow the fluctuation of the liquid level in the tank, has a simple structure, and is excellent in reliability. is there.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to provide a device for collecting a surface layer of a liquid in a tank, wherein the cylindrical member is provided in the tank while being immersed in the liquid in the tank. Of the partition wall,
A base portion for closing the lower end side open surface of the partition portion, and an annular float portion having a hole, at least a lower end portion of which is housed in the partition portion, so as to be displaceable with respect to the partition portion, A liquid discharging means connected to a liquid collecting space surrounded by the partition, the base and the float, wherein when the liquid discharging is operated, the upper end of the float is a liquid in the tank. It is settled in the liquid collecting space, and the surface layer of the liquid in the tank is taken in through the hole of the float portion, and the solution is solved by the surface liquid collecting device. .

That is, in the apparatus having the above-described structure, the float portion which freely moves up and down (floats and sinks) with respect to the partition wall portion is used for collecting the surface layer (surface layer solution) of the liquid in the tank. By the way, even when a large amount of liquid flows into the tank at once and the liquid level rises suddenly, the float part immediately rises to an appropriate position in response thereto. If the liquid discharging means is in operation, the float is stabilized with its upper end immersed in the liquid in the tank.

Therefore, regardless of the fluctuation of the liquid level, the surface liquid in the tank is continuously taken in from the holes in the float portion. That is, the surface liquid collecting apparatus of the present invention automatically follows the fluctuation of the liquid level in the tank, so that the surface liquid in the tank can be collected very efficiently.

In addition, the surface liquid collecting apparatus of the present invention does not require a sensor for detecting a water level, an automatic elevating mechanism controlled by a command from the sensor, and the like. That is, since it has a very simple structure depending on the natural floating and sinking of the float portion, there is no trouble such as a failure, and extremely excellent reliability is exhibited. At the same time, the cost can be kept low, so that it can be provided at low cost.

It is preferable that the surface liquid collecting apparatus of the present invention is configured so that the height of the partition in the tank can be adjusted. More specifically, the partition is supported using a column that stands upright in the tank, a hanging material that hangs down from the opening of the tank, or an arm that projects horizontally from the inner surface of the side wall of the tank. Will be done. Therefore, it is desirable that the support for such a partition is configured so that the height position of the partition in the tank can be adjusted.

It is preferable that a spiral ridge or a ridge is provided on the inner peripheral surface of the float portion. In other words, when the helical ridges or dents are provided on the inner peripheral surface of the float portion, when the surface layer liquid flows over the upper end of the float portion and flows into the liquid collecting space, the liquid flowing down the inner peripheral surface is reduced. Rotate the float. In other words, during the collection of the surface liquid, the float part constantly rotates (rotates) with respect to the partition part.

Therefore, dust and the like hardly adhere to the peripheral surface of the float portion, and troubles such as malfunction due to the dust are suppressed for a long time. In addition, the rotation of the float achieves its very stable upright state. As a result, the surface liquid collecting device of the present invention more reliably performs the surface liquid collecting function.

The shape (cross-sectional shape) of the partition and the float is not limited at all. For example, not only a circle (including an ellipse or an ellipse but also a perfect circle), for example, a rectangular shape or another cross-sectional shape may be appropriately adopted. However, when the float portion is configured to rotate as described above, the cross-sectional shapes of the partition portion and the float portion are set in principle to a perfect circle.

Incidentally, the "surface liquid" and the "surface layer of the liquid" referred to in the present specification generally refer to a portion approximately several centimeters in depth from the liquid surface, particularly approximately several millimeters in depth. In particular, when the liquid is composed of water and oil, the oil layer formed (spread out) above the water layer corresponds to the above-mentioned "surface liquid" or "surface of liquid". However, this is an ideal division, and in fact, a part of the water layer existing below the oil layer is also collected together with the oil layer.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to FIGS. FIG. 1 is a schematic view of an installed state of the surface liquid collecting apparatus according to the present embodiment, and FIG.
Is a perspective view of the float portion, the partition wall portion and the base portion constituting the surface liquid collecting device in a separated state, FIG. 3 is a partial cross-sectional view of the float portion, and FIGS. 4 and 5 are surface liquid collection devices according to the present embodiment. It is a principal part expanded sectional view which shows the function of an apparatus.

The surface liquid collecting apparatus according to the present embodiment (hereinafter referred to as
As shown in FIG. 1, the surface liquid collecting device is installed in a tank (grease trap) T in which wastewater containing a large amount of oil from a kitchen or the like is temporarily stored. The present surface liquid collecting device is for continuously collecting the surface layer of the wastewater (liquid) in the tank T, that is, the surface liquid (particularly, oil). In other words, the oil layer in the tank T is continuously discharged out of the tank T by the surface liquid collecting device. However, FIG. 1 shows a state in which there is no inflow of drainage into the tank T and a pump (liquid discharging means) described later is stopped.

The surface liquid collecting apparatus comprises, as main components, a cylindrical partition 1, a base 2 for closing an open surface on the lower end side of the partition 1, a float 3, and a pump (liquid discharging means) 4. Is provided. Here, a brief description will be given of how the present surface liquid collecting apparatus including these components is supported in the tank T.

The surface liquid collecting apparatus of the present invention generally comprises a tank T
It is supported by a gantry A provided therein. This stand A
Is composed of a base 11 having a large weight, which is settled on the bottom surface of the tank T, a column 12 erected on the base 11, and an arm 13 projecting from the middle of the column 12 in the horizontal direction. A handle 14 is attached to an upper end of the column 12, and by rotating the handle 14, a screw mechanism built in the column 12 is operated, and the arm 13 is displaced upward or downward. .

The pump 4 is connected to the distal end side of the arm 13, and the pump 4 is further connected to the base 2. Therefore, the surface liquid collecting apparatus, particularly the partition 1 constituting the apparatus, is supported by the gantry A so that the position in the vertical direction can be adjusted (can be raised and lowered).

Next, the structure of the surface liquid collecting apparatus will be described in more detail. First, regarding the partition 1, the partition 1 is cylindrical, and is provided in the tank T in a state of being immersed in drainage, as can be seen from FIG. However, as described above, the height position of the partition wall 1 can be appropriately changed as needed (it goes without saying that the height position of the partition wall 1 is fixed during the work of collecting the surface liquid).

More specifically, the upper end of the partition 1 is 9 inward.
The partition 1 is bent by 0 degrees, thereby forming a flange 1a that closes a part of the open surface on the upper end side. This flange 1a is provided on the outer peripheral surface of the float portion 3.
It is in contact with the entire circumference and plays a role of guiding the float portion 3.

The flange 1a also functions as a stopper for restricting the movable range of the float portion 3 so that the float portion 3 does not separate from the partition portion 1. In the present embodiment, the outer peripheral surface of the float portion 3 and the flange 1a facing the outer peripheral surface of the float portion 3
Is extremely small, so that the amount of drainage entering the space in the partition 1 from the gap is negligible.

Next, the base 2 closes the lower end open surface of the partition 1 as described above, that is, plays a role of preventing drainage from entering the inside of the partition 1 from the open surface. I am carrying it. The base portion 2 is formed with a through-hole 2a for feeding the surface liquid (oil component) collected to the pump 4 side. The suction port of the pump 4 is connected directly to the through hole 2a of the base 2 (or indirectly by using a pipe).

As can be seen from FIG. 2, the float portion 3 is also of an annular shape having a hole 3a at the center. here,
In order to provide the required buoyancy, the float portion 3 is formed as a hollow body (the hollow portion is indicated by 3b in FIGS. 3 to 5).
A mortar-shaped (inverted U-shaped section) tapered surface 3c is formed above the hole 3a.
On the other hand, below the hole 3a,
A circular concave portion 3d having a larger diameter than that is formed. This concave portion 3d is provided so that effective buoyancy is generated even when the float portion 3 is in contact with the base portion 2.

In this embodiment, an opening 31a is provided in the skirt portion 31 surrounding the recess 3d. For this reason, the collected surface liquid present inside and outside the liquid collecting space described later can come and go through the opening 31a. By the way, the provision of the opening 31a reduces the resistance when the float part 3 moves up and down, and the float part 3
Is to be able to move sharply.

The float 3 is housed in the partition 1 at least at its lower end (most except the upper end in the state shown in FIG. 1) so as to be displaceable with respect to the partition 1. I have. That is, the float portion 3 is in a state of floating on the surface liquid flowing into the space (liquid collection space) S formed by the partition portion 1 and the base portion 2 and furthermore, the float portion 3 itself. It moves up and down following the increase and decrease of the liquid volume. That is, if the amount of the surface liquid in the collection space S increases, the float portion 3 naturally rises, and if the amount of the surface liquid decreases, the float portion 3 naturally falls.

In order to smoothly move the float 3 up and down, in other words, to reduce the friction between the float 3 and the end face of the flange 1a of the partition 1 as much as possible. A film made of a resin having an extremely small coefficient is formed. Also, at the lower end of the float part 3,
Flange corresponding to flange 1a of bulkhead 1 (large diameter part)
32 are formed. The flange 32 plays a role in cooperating with the flange 1a to regulate the movable range of the float 3 so that the float 3 does not separate from the partition 1.

Furthermore, as shown in FIG. 3, the inner peripheral surface of the float portion 3, especially the inner peripheral surface of the hole 3a, has a spiral shape.
More precisely, a plurality of ridges (concave ridges) 33 are provided along the spiral. The surface liquid flowing into the holes 3a of the float portion 3 constantly collides with these ridges 33, and this exerts a circumferential force on the inner peripheral surface of the float portion 3. As a result, a rotational force is generated in the float part 3, and the float part 3 is continuously rotated during the work of collecting the surface liquid. Therefore, dust or the like that causes a malfunction does not adhere to the outer peripheral surface of the float portion 3.

However, the ridges (or recesses) 33 are
It is not absolutely necessary for the float unit 3. That is,
The inner peripheral surface of the float portion 3, particularly the inner peripheral surface of the hole 3a, may be a simple smooth curved surface instead of the above structure (in this case, needless to say, the float portion 3 does not rotate).

Next, the pump 4 is provided with a liquid collecting space S surrounded by the partition 1, the base 2, and the float 3.
Are connected to each other through a through hole 2 a of the base 2. Therefore, by operating the pump 4, the surface liquid in the liquid collecting space S is quickly discharged out of the tank T via the hose 5 connected to the pump 4. The pump 4
The end of the hose 5 not shown is located outside the tank T.

Generally speaking, in this surface liquid collecting apparatus, when the amount of the surface liquid in the collection space S decreases from the state shown in FIG. The upper end is immersed in the drainage water in the tank T (the upper end of the float portion 3 is about 1 cm below the water surface). For this reason, as shown in FIG. 4, only the surface layer of the drainage in the tank T, that is, the surface liquid (mainly oil) is taken into the liquid collecting space S via the holes 3a of the float portion 3, as shown in FIG. In the present surface liquid collecting apparatus, the surface liquid collected in this manner is configured to be discharged out of the tank T by the action of the pump 4.

In the surface liquid collecting apparatus, the surface liquid in the tank T can be freely moved up and down (floating and sinking) with respect to the partition 1 to collect the surface liquid.
A float unit 3 that can be used is used. By the way, now (during surface liquid collection), a large amount of wastewater flows into the tank T at once,
As a result, the water level rises rapidly. At this time, since the wastewater rapidly flows into the liquid collecting space S, the float 3
Immediately floats in response to the increase in the liquid volume in the liquid collecting space S (the floating amount is indicated by H in FIG. 5). At this time, if the pump 4 is in operation, the inflow and outflow of the surface liquid are balanced, so that the upper end of the float portion 3 is 1
It is stable in a state where it exists about cm below.

Therefore, only the surface liquid in the tank T is continuously taken in from the holes 3a of the float portion 3 irrespective of the fluctuation of the water level. As described above, the present surface liquid collecting apparatus can quickly and automatically follow the fluctuation of the water level in the tank T, so that the surface liquid can be collected very efficiently.

Further, unlike the conventional apparatus, the surface liquid collecting apparatus does not require a sensor for detecting a water level, a complicated automatic elevating mechanism controlled by a command from the sensor, and the like. That is, since it has a very simple structure that depends on the natural floating and sinking of the float part 3, there is no trouble such as a failure and extremely high reliability is exhibited. At the same time, the cost can be kept low, so that it can be provided at low cost.

In this embodiment, the pump as the liquid discharging means is provided inside the tank, particularly below the base. However, the position of the pump is not limited to that of the present embodiment, and can be appropriately changed as needed. For example, the pump may be installed outside the tank to suck the surface liquid. .

[0042]

The surface liquid collecting apparatus of the present invention can automatically follow the fluctuation of the liquid level in the tank, and has a simple structure and excellent reliability.

[Brief description of the drawings]

FIG. 1 is a schematic view of an installed state of a surface liquid collecting apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of a float, a partition, and a base constituting the surface liquid collecting apparatus according to the embodiment of the present invention in a separated state.

FIG. 3 is a partial cross-sectional view of a float portion.

FIG. 4 is an enlarged sectional view of a main part showing functions of the surface liquid collecting apparatus according to the embodiment of the present invention.

FIG. 5 is an enlarged sectional view of a main part showing functions of the surface liquid collecting apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 T tank A frame 1 partition 1a flange of partition 2 base 2a through-hole of base 3 float 3a hole of float 3b hollow of float 3c tapered surface of float 3d recess of float 4 pump ( 5 Hose 11 Base of gantry 12 Column of gantry 13 Arm of gantry 14 Handle of gantry 31 skirt part of float part 31a Opening of skirt part 32 Flange of float part 33 Ridge on inner peripheral surface of float part S Collection space

Claims (3)

[Claims] 1. A device for collecting a surface layer of a liquid in a tank, comprising: a cylindrical partition provided in the tank while being immersed in the liquid in the tank; A bottom portion that closes a lower-side open surface of the base portion, and is displaceable with respect to the partition portion, at least a lower end portion is housed in the partition portion, and an annular float portion having a hole; and the partition portion, A liquid discharging means connected to a liquid collecting space surrounded by the base part and the float part, wherein when the liquid discharging means is operated, an upper end of the float part is immersed in the liquid in the tank. The surface liquid collecting apparatus is characterized in that a surface layer of the liquid in the tank is taken into the liquid collecting space through a hole of the float portion. 2. The surface liquid collecting apparatus according to claim 1, wherein the height position of the partition in the tank is adjustable. 3. The surface liquid collecting apparatus according to claim 1, wherein a spiral convex or concave ridge is provided on an inner peripheral surface of the float portion.