JPH0724667B2 - Dental unit wastewater separator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage separator for a dental unit, and more particularly to a gas-liquid separator for converting sewage sucked from a sewage suction pipe into a cyclone.

[0002]

2. Description of the Related Art As a conventional sewage separator for a dental unit, sewage such as liquid or blood accumulated in the mouth during dental treatment is usually sucked out by using a vacuum blower to separate only sewage from a mixed substrate. A sewage separator is installed in the middle of the pipeline. The sewage separator has a method in which the inside volume of the separator is increased to some extent, the vacuum blower is temporarily stopped when the water is full, and the sewage in the separator is discharged. Further, there is known a sewage separator described in Japanese Patent Publication No. 63-24697, which is miniaturized so that it can be installed inside a medical examination table and performs gas-liquid separation by a cyclone method.

[0003]

In the conventional technique as described above, the former separator has a large inner volume, and the suctioned wastewater flow rate is dropped in the separator to perform gas-liquid separation. There is an advantage that it is not necessary to consider the shape in consideration of characteristics and the like, the structure is simple, and the number of parts is small. However, unless the internal volume of the separator is increased to some extent, the flow velocity does not decrease, and there is a problem that sewage flows into the pump.

When a separate machine room is provided, the size of the separator does not matter so much because the installation space can be obtained to some extent. It is becoming necessary to install a separator (immediately after the suction hose).

In this case, in order to obtain a sufficient separation effect, the size of the separator itself becomes large and it cannot be installed inside the medical examination table, or if it is made small so that it can be installed inside the medical examination table, the flow velocity will be sufficient. There is a problem that sewage does not fall and the pump easily gets dirty water.

The present invention has been made in view of the conventional problems as described above. The wastewater is discharged in a cycloidal manner to separate gas and liquid, the flow is controlled with a simple structure, and the size and cost are reduced. It is an object of the present invention to provide a sewage separator for a dental unit in which the reduction of

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention provides a cylindrical wastewater separator main body having a discharge pipe in the lower portion thereof and an upper lid provided above the wastewater separator main body. The partition wall provided vertically inside the main body divides the inside of the sewage separator into a sewage suction chamber and a gas-liquid separation chamber, and the lower sides of both chambers are connected to each other and provided in the sewage suction chamber. The bottomed cylinder is provided with a slit for discharging the wastewater in the direction along the inner surface of the wastewater separator main body, and the wastewater suction pipe is connected to the upper part of the cylinder so as to flow out from the slit to the wastewater suction chamber. Then, a winding plate for guiding the sewage flowing to the gas-liquid separation chamber side downward is provided in the sewage suction chamber, and an exhaust pipe connected to a vacuum blower is connected to the upper part of the gas-liquid separation chamber. It is a thing.

[0008]

In the above structure, when the vacuum blower is operated to exhaust the gas-liquid separation chamber through the exhaust pipe, the inside of the main body of the sewage separator becomes negative pressure, and the sewage is sucked through the sewage suction pipe. .

The sewage sucked through the sewage suction pipe reaches the cylinder, flows out from the slit provided in the cylinder in the direction along the inner surface of the sewage suction chamber of the sewage separator main body, and flows toward the gas-liquid separation chamber. When it does, it is guided downward by the roll plate.
Therefore, a swirling flow directed downward is generated in the waste water in the main body of the waste water separator.

As described above, the swirling flow is generated in the dirty water, so that the centrifugal force is applied for the separation, the efficiency of the gas-liquid separation is improved, and the overall structure can be made more compact. It is a thing.

Further, when the waste water is discharged from the lower discharge pipe in the state where the swirling flow is generated as described above, the scale which tends to be accumulated at the bottom of the waste water separator body can be easily discharged. Is.

[0012]

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

Referring to FIG. 4, the sewage separator 1 for a dental unit has an upper lid 7 on an upper portion of a sewage separator main body 3 having a cylindrical shape. The sewage suction pipe 5 sucking from each medical examination table is connected to the sewage connection port 9 provided in the upper lid 7. Further, the upper lid 7 is provided with an exhaust connection port 11,
A joint 13 is attached to the exhaust connection port 11, and the joint 13
Further, it is connected to a vacuum blower 17 via an exhaust pipe 15.

A discharge pipe 21 provided with a discharge valve 19 for discharging the waste water accumulated in the waste water separator body 3 is provided at the lower portion of the waste water separator body 3, and the suction side is forcibly sucked to the outlet side of the discharge pipe 21. An ejector 23 for performing the operation is provided.

In addition, a partition plate 29 is vertically provided inside the main body 3 of the waste water separator to partition the main body 3 of the waste water separator into a waste water suction chamber 43 and a gas-liquid separation chamber. The sewage suction chamber 43 is provided with a bottomed cylindrical body 27 having a slit 25 that is suspended from the upper lid 7 and communicates with the sewage suction pipe 5. Between the cylindrical body 27 and the partition plate 29, a winding strip that guides the downward flow of sewage flowing out into the sewage suction chamber 43 of the sewage separator main body 3 and flowing toward the gas-liquid separation chamber side in a spiral shape. The plate 31 is connected. Further, a float 35 having a valve seat 33 is vertically movable in the gas-liquid separation chamber immediately below the exhaust connection port 11 provided in the upper lid 7.

With the above structure, the vacuum blower 17
The sewage such as saliva and dust accumulated in the oral cavity of the patient that is sucked from the examination table by the operation of 1 is sucked into the sewage separator main body 3 through the sewage suction pipe 5. The sewage flows out from the slit 25 of the cylindrical body 27, flows along the inner wall of the sewage separator main body 3, and at the same time, is directed downward along the winding plate 31 and flows in a spiral shape.

That is, since a swirling flow is generated in the sewage, the centrifugal force is applied for separation, and the efficiency of gas-liquid separation is improved.

Then, the water level of the sewage collected in the sewage separator main body 3 rises, and the float 35 is pushed up, whereby the valve seat 33 closes the exhaust connection port 11 and stops suction.
This is the time when the inside of the sewage separator main body 3 is filled with sewage, and the discharge valve 19 is opened and the ejector 23 is operated as necessary to forcibly discharge sewage out of the device.

The structures of the cylindrical body 27, the winding plate 31, and the partition plate 29 will be described in more detail. With reference to FIGS. 1, 2 and 3, a cylinder body 27 formed by using a pipe is provided directly below the connection port 9 for sewage provided on the upper lid 7, and a lower portion of the cylinder body 27 is a lower part. It is closed by a plate 37 and has a slit 2 vertically extending in the lower portion of the tubular body 27 with a predetermined length.
5 is drilled. The notch direction of this slit 25 is
As shown in FIGS. 1 and 3, the wastewater separator main body 3 is provided at a position where the discharged wastewater rotates along the inner wall of the main body 3.

On the other hand, a plate-shaped partition wall 29 is provided so as to hang down from the substantially central portion of the upper lid 7, and communication paths 39a and 39b are provided in the lower part of this partition plate 29.

Further, a plate-shaped winding plate 31 is provided between the partition plate 29 and the cylindrical body 27, and the winding plate 31 is provided.
Surrounds the cylindrical body 27 with the upper end of the slit 25 formed in the cylindrical body 27 as a base point, forms a smooth inclined surface 41, and allows wastewater to flow downward in a spiral shape.

Reference numeral 45 is a float support plate provided in the gas-liquid separation chamber, and has a float support hole 47. Further, reference numeral 49 is a float support plate having a float support hole 47.

With the above structure, the slit 25 of the cylinder 27 is formed.
The sewage discharged into the sewage suction chamber 43 of the sewage separator body 3 flows toward the gas-liquid separation chamber side along the inner wall of the sewage separator body 3 and is guided by the winding plate 31 to form a downward spiral. Flow and swirl flow are performed, and gas-liquid separation is performed.

Although the ejector 23 for forcibly sucking is provided in this embodiment, the float 35 may not be necessarily provided when the ejector 23 is provided. However, in this case, a detection member that detects full water and sends air to the ejector 23 is necessary, and it can be applied to a wastewater separator in which the ejector 23 is not provided.

FIG. 5 shows a second embodiment of the present invention. In this embodiment, when the scale or the like becomes sludge-like and the slit 25 of the cylinder 27 is clogged,
A device for eliminating the clogging is provided.

That is, in this embodiment, in order to eliminate the clogging of the slit 25 of the cylinder 27, an air pipe 51 for cleaning is arranged in the cylinder 27, and the air pipe 5
The air ejection port No. 1 is provided so as to face the slit 25. Therefore, the clogging of the slit 25 can be eliminated by ejecting air from the air pipe 51 to the slit 25.

It is desirable that the air pipe 51 is vertically movable so that it can move along the slit 25. Further, it is desirable that the cleaning cleaner inflow port 53 is provided to allow the cleaning cleaner to flow into the cylindrical body 27.

The structure for eliminating the clogging of the slit 25 of the cylindrical body 27 is not limited to the above-mentioned embodiment, but can be implemented in various modes. For example, instead of the air pipe 51, a cleaning operating rod is provided so as to be vertically movable, and a scratching portion or a brush portion provided on the operating rod is engaged with the slit 25 to move up and down, thereby clogging the slit 25. It is also possible to adopt a configuration in which

Reference numeral 55 in FIG. 5 is an air valve, 57 is an air valve pilot valve, and since the other construction is almost the same as that of the first embodiment, the construction parts having the same functions are the same. The detailed description will be omitted by giving the reference numerals.

[0030]

As will be understood from the above description of the embodiments, the present invention is, in short, the upper part of the cylindrical waste water separator body (3) having the discharge pipe (21) at the lower part and the upper lid (7). ) Is provided, and the inside of the sewage separator main body (3) is divided into a sewage suction chamber and a gas-liquid separation chamber by a partition plate (29) vertically provided in the sewage separator main body (3), and The bottom of both chambers are provided in communication with each other, and the bottomed cylindrical body (27) provided in the sewage suction chamber is provided with the sewage separator main body (3).
A slit (25) for discharging sewage in a direction along the inner surface of the sewage is provided, and a sewage suction pipe (5) is connected to the upper part of the cylindrical body (27) so as to flow out from the slit (25) to the sewage suction chamber. An exhaust pipe (1) connected to the vacuum blower (17) is provided with a winding plate (31) for guiding the sewage flowing downward to the gas-liquid separation chamber side in the sewage suction chamber.
5) is connected to the upper part of the gas-liquid separation chamber.

With the above structure, according to the present invention, when the vacuum blower is operated to exhaust the gas-liquid separation chamber through the exhaust pipe, the inside of the sewage separator main body becomes negative pressure, and the sewage suction pipe is evacuated. Sewage is sucked.

The sewage sucked through the sewage suction pipe reaches the cylinder, flows out in the direction along the inner surface of the sewage suction chamber of the sewage separator main body from the slit provided in the cylinder, and flows toward the gas-liquid separation chamber. When it does, it is guided downward by the roll plate.
Therefore, a swirling flow directed downward is generated in the waste water in the main body of the waste water separator.

As described above, the swirling flow is generated in the sewage, so that the centrifugal force is applied for the separation, the efficiency of the gas-liquid separation is improved, and the overall structure can be made smaller. It is a thing.

Further, as described above, when the waste water is discharged from the lower discharge pipe in the state where the swirl flow is generated, it is possible to easily discharge the scale which tends to accumulate at the bottom of the waste water separator body. Is.

[Brief description of drawings]

FIG. 1 is an enlarged view of a portion indicated by an arrow I in FIG. 4, showing a main part of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a bottom view of a portion indicated by an arrow III in FIG.

FIG. 4 is a sectional view of a dental unit sewage separator according to an embodiment of the present invention.

FIG. 5 is a cross-sectional explanatory view of the second embodiment.

[Explanation of symbols] 1 sewage separator 3 sewage separator main body 5 sewage suction pipe 7 upper lid 15 exhaust pipe 17 vacuum blower 21 drainage pipe 25 slit 27 cylinder 29 partition wall plate 31 roll plate

Claims (1)

[Claims] 1. An upper lid (7) is provided on an upper portion of a cylindrical wastewater separator body (3) having a discharge pipe (21) at a lower portion, and is vertically provided in the wastewater separator body (3). Partition plate (2
The bottomed cylinder provided in the waste water suction chamber by dividing the inside of the waste water separator main body (3) into a waste water suction chamber and a gas-liquid separation chamber by 9) and connecting the lower sides of both chambers in communication with each other. The body (27) is provided with a slit (25) for discharging sewage in a direction along the inner surface of the sewage separator body (3), and
A sewage suction pipe (5) is connected to the upper part of the cylindrical body (27) to guide sewage flowing out from the slit (25) to the sewage suction chamber and flowing toward the gas-liquid separation chamber in a downward direction. A winding plate (31) is provided in the sewage suction chamber, and a vacuum
A sewage separator for a dental unit, comprising an exhaust pipe (15) connected to a blower (17) connected to an upper part of the gas-liquid separation chamber.