JPS6336315B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for removing floating objects in a circulating water tank suitable for car washing equipment for large vehicles, etc., and in particular, water is injected onto the surface of circulating water to generate waves, and the waves are used to remove floating objects. The present invention relates to a floating object removal device that allows floating objects to flow out naturally.

Conventionally, washing large vehicles has relied on hand washing, and because the washing area is larger and dirtier than that of passenger cars, it takes two to four hours to wash one car.
Additionally, workers washed cars in unfavorable working conditions, wearing raincoats to prevent wash water and muddy water from splashing onto their work clothes. On the other hand, car wash equipment for small vehicles, such as those installed at gas stations, where the car is moved while the vehicle is stopped, is too large for large vehicles, so it is not practical. The current situation is that it cannot be provided. Therefore, as a car wash device for such a large vehicle, there is a car wash device in which the car wash device is kept stationary and the vehicle is driven by itself inside the device, and high-pressure washing water is sprayed onto the vehicle to wash the car in a short time. A device can be considered.

However, large vehicles such as trucks often drive on rough roads and are used in harsh conditions, so they are heavily contaminated with mud and oil, so the washing water once used for car washing becomes considerably dirty and sewage. Since the amount of washing water used is extremely large, it cannot be disposed of in the drain after one use, but must be purified in a circulating water tank and reused. Therefore, it is necessary to remove mud and floating objects from the wastewater, but these floating objects contain various foreign objects such as oil, dirt, wood chips, etc., and the cleaning water is washed without removing these floating objects. If they are reused, they will be mixed into the sprayed cleaning water, resulting in clogging of the spray nozzle, reduced cleaning efficiency, and other drawbacks such as dirt and damage to the vehicle. However, with the conventional technology, it is extremely difficult to completely remove floating objects in wastewater, and the equipment has become large and complicated, resulting in high equipment costs.

Furthermore, in the prior art column of Japanese Utility Model Publication No. 58-8398, it is stated that it is known to remove oil from the cleaning liquid and circulate it to the injection nozzle, and to remove the oil by an overflow method. There is no disclosure of how to do this in a practical and economical manner.In fact, because of the overflow method, the degree of purification is poor, and the cleaning solution becomes contaminated with oil and floating sludge that are not removed, making it difficult to clean the tank. It is stated that the liquid needs to be replaced frequently, and as a result, there are problems such as increased burden on the waste water treatment facility of the workplace due to the discharge of polluted liquid. Therefore, in the invention of the prior art, the oil is separated using a centrifugal separator without relying on the overflow method, and together with the adoption of a sludge conveyor, the equipment is extremely large, complex, and expensive. There was a drawback.

Furthermore, Japanese Patent Application Laid-Open No. 51-140269 describes that the oil collection effect can be enhanced by concentrating the area around the oil collection port for flowing water, but in the conventional example, the circulating water tank was There is no disclosure at all of the idea that the object is divided into a plurality of parts and communicated with each other, or that a small amount of water is dropped to generate waves, and that the waves aggregate floating objects.

In addition, although there is a description in Utility Model Application No. 50-130171 that overflow is caused by waves, it does not disclose the concept of causing waves by dropping a small amount of water from the water inlet, but rather a donut-shaped raking floating structure. This method merely discloses a technique that mechanically generates waves while scraping floating sludge and overflows intermittently, and its mechanical structure is inevitably quite complex.

The present invention has been made in order to eliminate the above-mentioned drawbacks of the prior art, and its purpose is to prevent sewage containing floating substances such as oil from flowing into car washing equipment for large vehicles such as truck buses. A circulating water tank is divided into a plurality of parts by a partition wall to temporarily store waste water, and a circulating water tank is provided at the bottom of the partition wall so that the horizontal position is staggered. A communication hole that allows water to flow into the circulation water tank on the side, a plurality of inlets that allow a small amount of water to drip into the upper opening end of the circulation water tank, and an independent control system for controlling the amount of water dripping from the plurality of water inlets. A water supply valve is provided at each water inlet so that the water can be adjusted, and a water supply valve is provided at the upper opening end of the circulation tank on the side opposite to the water inlet. To easily remove floating objects such as oil, dirt, wood chips, etc. that are washed away during vehicle washing with an extremely simple configuration in a circulating water tank by providing an overflow port that allows water to flow out naturally. The goal is to make it possible to
This also prevents clogging of the fountain nozzle and damage and dirt on the vehicle, as well as improving cleaning efficiency and reducing equipment costs.

In short, the present invention provides a circulating water tank divided into a plurality of parts by a partition wall to allow sewage containing floating substances such as oil to flow in and temporarily store the water, and a circulating water tank that is divided into a plurality of parts by a partition wall, and a structure in which horizontal positions are staggered at the bottom of the partition wall. A plurality of communication holes are respectively provided so that the wastewater with few floating substances in the lower part of the wastewater flows sequentially into the circulating water layer on the downstream side, and a plurality of communicating holes are provided to allow a small amount of water to drip into the upper opening end of the circulating water tank. a water inlet, a water supply valve provided at each water inlet so as to be able to independently adjust the amount of water dripping from the plurality of water inlets, and an upper open end of the circulating water tank on the side facing the water inlet; The present invention is characterized in that it is provided with an overflow port, which is provided at the part of the waste water surface, and allows floating objects on the surface of the wastewater to naturally flow out due to wave motion caused by water injection from the water injection port.

The present invention will be explained below based on embodiments shown in the drawings. A car wash device 1 related to the present invention is installed in a building 4 provided with a roof 2 and side walls 3,
It includes a fixed water supply pipe 5, a rotating joint 6, a swinging water fountain pipe 7, a swinging device 8, an electric operation panel 9, and an operation switch 10.

The fixed water supply pipe 5 is fixed in a floor surface 12 made of concrete, and as shown in FIG. It consists of second and third water supply pipes 5b and 5c that stand upright from near both left and right ends of the water supply pipe and communicate with the first water supply pipe.
One end of the first water supply pipe 5a is connected to a pump 14 disposed in a circulation water tank 13, and the circulation water tank 13 includes a partition wall 13a and an oil-water separation tank 8.
6 are attached.

A plurality of rotation joints 6 are attached to the fixed water supply pipe 5 at regular intervals, and are connected to a fixed member 6a fixed to the fixed water supply pipe 5 and a ball bearing 18 to the fixed member so as to rotate smoothly. and a rotating member 6b attached to the rotary member 6b.
Further, a dust seal 19 to prevent foreign matter from entering from the outside and a gasket 20 to prevent water leakage due to internal pressure are installed between the rotating member and the fixed member 6a.
A grease nipple 23 for supplying grease to the rotating member 6b is attached to a plug member 22 screwed onto the rotary member 6b via a sealing member 21.

The swinging water fountain pipes 7 (hereinafter referred to as "fountain pipes") have one end fixed to the rotating member 6b of the rotating joint 6, and the other end connected to the first, second and third water supply pipes 5a,
It is supported perpendicularly to each water supply pipe by a plurality of bearings 26 fixed to a machine frame 25 arranged parallel to and facing 5b, 5c, respectively. The fountain pipe 7 also has a plurality of fountain nozzles 2 arranged at regular intervals.
7 (hereinafter referred to as "nozzle") is fixed.

The rocking device 8 includes a motor 28 and a rotating crank 2.
9, a connecting rod 30, and a swing link 31, and the motor 28 is fixed to the floor 12.
The rotating crank 29 is formed into a disk shape, and has a pivot 32 implanted in the center supported by a block 33 fixed to the floor 12. Between the rotating crank 29 and the pulley 28a of the motor 28, The rotation of the motor 28 is transmitted through the belt 34 wrapped around it. Further, a crank pin 35 is installed in the rotating crank 29 in the radial direction.

The connecting rod 30 is a first connecting rod 30a disposed substantially parallel to the first water supply pipe 5a.
and second and third connecting rods 30b and 30c arranged substantially parallel to each other and facing the first and second water supply pipes 5b and 5c, the first connecting rod 3
One end of Oa is connected by a universal joint 38 to a first connecting link 37 pivotally connected to a crank pin 35 of the rotating crank 29. The other end of the first connecting rod 30a is connected to a turnbuckle 39.
It is connected by a universal joint 38 to one end of a bell crank-shaped second connection link 41 which is pivotally attached to the machine frame 25 by a pin 40.
The lower end of the second connecting rod 30b is connected to the other end of the second connecting link 41 by a universal joint 38. In this way, the first and second connecting rods 30a and 30b are connected via the turnbuckle 39, so even if the parallelism of the floor surface 12 or the dimensions of each part are slightly out of order, the turnbuckle It is adjustable. The lower end of the third connecting rod 30c is connected by a universal joint 38 to a third connecting link 42 which is pivotally connected to a pin 40 of the rotating crank 29.

One end of the swing link 31 is fixed to each fountain pipe 7, and the other end is pivotally connected to the first, second, and third connecting rods 30a, 30b, and 30c, respectively. When the motor 28 rotates, the belt 34
The rotating crank 29 rotates through the first and second
The third connecting rods 30a, 30b, and 30c swing, and the fountain pipe 7 swings at a fixed angle, for example, 60 degrees, via the swing link 31.

As shown in FIGS. 3 and 7, a washing water injection direction switching device 43 is attached to a part of the second and third connecting rods 30b, 30c in place of the swing link 31. The device includes a plurality of
For example, a fan-shaped switching plate 45 having three counterbore portions 45a and an elongated hole 45b that communicates the counterbore portions with a switch lever 44 attached thereto and one end fixed to the fountain pipe 7, and connecting rods 30b, 30c. A positioning device consisting of a bolt (not shown) fixed to the bolt, a positioning hollow member 46 biased in one direction with respect to the bolt by a spring (not shown), and a knob 47 for pulling the hollow member. It is equipped with a mechanism 48. The switching device 43 can switch the direction in which the cleaning water is jetted from the nozzle 27.

The electrical operation panel 9 is the main electrical distribution board for the car wash device 1, and has the wiring for the pump 14 and the motor 28 integrated therein, and also has a timer that can set the car wash time and a time lag for starting the car wash device 1. It has a built-in timer.

The operating switches 10 are arranged on the inlet side and the outlet side, respectively, and the operating switch 10a on the inlet side is
It consists of a so-called pull switch, and is attached to the roof 2 by a placket 51 so that the car wash device 1 can be easily started from the driver's seat.
When the switch 10a is pulled once, the operation switch 10a is set to N, and when the switch 10a is pulled once again, it is set to FF.

The operating switch 10b on the exit side is mounted on a pillar 12a fixed to the floor 12, and is connected to the car wash device 1.
N and FF buttons (not shown) are provided for starting and stopping. Further, a high-pressure hot water car wash machine 53 is arranged on the floor adjacent to the operation switch 10b.

In addition, piping 56 for cleaning the floor surface is arranged at both left and right ends of the floor surface 12, and the piping is connected to the first water supply pipe 5a. Then, cleaning water is sprayed from a plurality of holes 56a formed in the pipe to the floor surface 1.
2 is designed to be washed. In addition, a drainage ditch 58 is provided in the floor surface 12, and the dirty water containing mud after washing the car is filtered by a net member 59 and sent to the circulating water tank 13 through the drainage ditch 58. It's getting old. In addition, on the exit side of the floor surface 12,
A front end lift 60 is provided so that the front axle of the vehicle 54 can be raised when the vehicle 54 is repaired by the high pressure hot water car wash 53. Also building 4
The dimensions are, for example, depth 8m, entrance height 6m,
The ceiling height is 7m and the width is 5.5m.

Next, in FIG. 8 to FIG. 11, a floating object removal device 70 in a circulating water tank according to the present invention includes a circulating water tank 13, a partition wall 13a, and a communication hole 13b.
The circulating water tank 13 is divided into, for example, four tanks by a partition wall 13a. At the bottom of each partition wall 13a, there are a plurality of communication holes 13b through which the wastewater 81 with less floating matter 82 in the lower part of the wastewater sequentially flows into the circulating water tank 13 on the downstream side.
are provided so that their horizontal positions are staggered. A drainage ditch 58 is connected to the first tank _T1 , and sewage from the entire area of the car washing device 1 is collected in the drainage ditch and flows into the first tank _T1 . The water inlet 71 has a first tank T ₁ and a second tank
T ₂ , the upper opening end 13 of the third tank T ₃ and the fourth tank T ₄
c, each of which is provided with a manual valve 73 to drip a small amount of water. Water supply pipe 7
4 is provided with a solenoid valve 75, so that the water injection from each water injection port 71 is electrically controlled so that the water injection from each water injection port 71 is not forgotten. Further, a large diameter water supply pipe 78 having a manual valve 76 for supplying a large amount of water in a short time is disposed in the first tank _T1 .

The overflow port 80 is provided at the upper opening end 13d of the circulating water tank 13 on the side opposite to the water inlet 71, that is, at a diagonal position, and is provided at the upper opening end 13d of the circulating water tank 13, and is located on the side opposite to the water inlet 71, that is, at a diagonal position.
The floating objects 82 are swept away by the ripple-like waves caused by the water injected from the water inlet 71 and naturally flow out from the water inlet 80 into the drainage ditch 83.

Next, the oil separation device 85 in the circulating water tank related to the present invention will be explained.
, water pipe 88 , drainage device 89 , and oil sump tank 9
0. As described above, the circulation water tank 13 is configured to allow the oil-containing wastewater 81 to flow in and temporarily store it, and overflow mainly with the oil-rich wastewater 81, and the oil-water separation tank 86 is configured to:
is provided adjacent to the downstream side of the circulating water tank,
It is divided into a plurality, for example, four, by a partition wall 86a, and consists of a first separation tank ST ₁ , a second separation tank ST ₂ , a third separation tank ST ₃ and a fourth separation tank ST ₄ . A plurality of water pipes 88 are provided, and an oil/water separation tank 86
Each partition wall 86a connects the plurality of tanks ST ₁ , ST ₂ , ST ₃ and ST ₄ with each other and allows the wastewater 81 to flow from the bottom to the top and flow into the adjacent tank.
is attached to.

The drainage device 89 is for discharging the waste water 81 in the fourth separation tank ST ₄ located at the most downstream side of the oil-water separation tank 86 to the outside.
1, a check valve 92, and a drain pipe 93, which allow drainage to a high place. Note that if the sewerage system is located below the car wash room 1, the pump 91 is not necessary and a drain port with a valve (not shown) is simply installed at the bottom of the fourth separation tank _ST4 .
It is also possible to simply provide the following.

The oil reservoir tank 90 is provided adjacent to the downstream side of the oil-water separation tank 86, and is connected to each tank of the oil-water separation tank 86.
Sewage 81 containing a lot of oil leaked from the overflow port 95 provided at the top of ST ₁ , ST ₂ , ST ₃ , and ST ₄
It is now possible to store the water and pump it out periodically using a bakiyum car. Further, the drain 83 and the first separation tank ST ₁ are connected through a communication hole 86b provided in the first separation tank ST ₄ .
In addition, the oil-water separation tank 86 and the oil sump tank 90 are connected to the drain groove 9.
6 and 97, and the wastewater 81 from the drainage ditch flows in through a communication hole 90b provided at the upper part of the oil reservoir tank 90.

The present invention is configured as described above, and its operation will be explained below. The vehicle 54 is driven by itself and enters the car wash device 1 from the entrance side in the direction of arrow A, and the driver opens the window and presses the operation switch 1 on the entrance side.
Pull the string 52 of 0a. This switch operation is
Since you can simply pull the string 52 casually, you don't have to worry about operating it even in dark car washes, and it is also easier to operate than a conventional switch with two N and FF buttons (not shown). There is much less chance of making a mistake. Operation switch 10a
When becomes N, the driver closes the window and moves the vehicle 54 forward. When the switch is set to N, the pump 14 and motor 28 rotate, and the pump 14 sucks up the cleaning water from the circulation water tank 13 and supplies water to the first, second, and third water supply pipes 5a, 5b, and 5c. be done. Further, the fountain pipe 7 is connected to the pulley 28a, the belt 34, and the rotating crank 2 by the rotation of the motor 28.
9, first, second, third connection rods 37, 41,
42 and the swing link 31, the cleaning water is swung by, for example, 60 degrees, and the cleaning water, which has been increased in pressure to about 8 kg/cm ² , is injected from the nozzle 27 onto the vehicle 54.

In this way, by spraying the cleaning water onto the vehicle 54 while swinging at an angle of, for example, 60 degrees, in addition to the effect that the cleaning water opens by itself and spreads over a certain range when it comes out of the nozzle 27, Since the center of the spread moves, the conventional "line washing" state changes to a "surface washing" state, and not only can a wider area of the vehicle 54 be efficiently washed, but also the swinging of the nozzle 27 allows the cleaning water to be Since the spray direction changes from moment to moment, dirt that is difficult to remove with spray from one direction can be easily removed.

In this state, the vehicle 54 is washed by running at low speed, and the vehicle is moved back and forth as appropriate depending on the degree of dirt removal.For example, even if the vehicle is driven back and forth two or three times, the washing time is only 15 minutes. ~20 minutes is enough.
The sewage used for cleaning and containing mud, etc. is filtered by a net member 59, passes through a drainage ditch 58, and is collected in a circulating water tank 13 as shown by arrow B, and is collected in a first tank T of the circulating water tank. ₁ flows into the second tank T2 through the communication hole 13b provided in the partition wall _13a , where it is slightly purified, and then flows to the third tank _T3 and fourth tank _T4 , where oil, dirt, Floating objects 82 such as wood chips gradually gather upward and float, and become purified washing water below. Then, it is sucked up by the pump 14, reused by the car wash device 1, and circulated in the same manner.

After washing the vehicle 54, the driver opens the window and pulls the string 46 of the operating switch 10a. In this case as well, the switch operation is completed without fear of operational error, the pump 14 and motor 28 are stopped, the injection of washing water from the nozzle 27 is also stopped, and the washing of one vehicle 54 is completed.

In addition, in order to perform repair washing of the vehicle 54, that is, to wash the parts where dirt cannot be completely removed by the car washing device 1,
When the vehicle 54 is stopped on the exit side after car washing, the operation of the car wash device 1 is stopped by pressing the FF button of the exit side operation switch 10b without going to the entrance side operation switch 10a. Then, the high-pressure hot water car wash machine 53 is operated, and the parts around the engine and the like that are heavily soiled by the nozzle 53a of the high-pressure hot water car wash machine can be washed by hand.

As described above, according to the present invention, the swinging water supply pipe 7 swings by, for example, 60 degrees, and the nozzle 27 accordingly swings by 60 degrees to spray cleaning water onto the vehicle 54. Since the surface is washed and the direction in which the washing water is jetted changes every moment, the washing effect is improved. Further, the fountain pipe 7 is connected to the fixed water supply pipe 5 so as to rotate smoothly at a rotation joint 6.
Furthermore, since the rotating joint 6 is equipped with a dust seal 19 and a gasket 20, foreign matter will not enter the ball bearing 18, and water will not leak even under high pressure of 8 kg/cm ² . , its durability is very great.

Next, the floating object removal device 70 in the circulating water tank 13
The effect of this will be explained. Washing water once injected for car washing becomes sewage water 81, where mud is settled and removed from the entire area of the car washing device 1 along the way, and the water containing oil, dirt, wood chips, etc. is sent from the drain 58 to the circulating water tank. 1
The lower sewage with low oil content flows into the adjacent second tank T ₂ as shown by arrow C from the communication hole 13b of the partition wall 13a, and on the other hand _, floating substances such as oil 8
2 is light, so it gathers upwards and floats. Sewage 81
The water flows one after another to the third tank T ₃ and the fourth tank T ₄ as shown by arrow C, and is gradually purified, and in the fourth tank T ₄ it is purified to the extent that it can be used as washing water.
However, floating objects 82 in the wastewater are collected in both tanks T ₁ and
They also exist in T ₂ , T ₃ , and T ₄ , and their amount gradually increases, so when the floating objects 82 increase to a certain limit, the pump 14 and motor 28 of the car wash device 1 are stopped, and the car wash is stopped. stop, set the solenoid valve 75 on a timer to close again after a certain period of time, and open it.
Water is supplied from the water supply pipe 74 to each water inlet 71, and by adjusting each manual valve 73, water is supplied from each water inlet 71 to each tank T ₁ ,
Drop a small amount of water onto T ₂ , T ₃ , and T ₄ . Then, ripple-like waves occur on the surface 81a of the waste water 81 in each tank, and these waves reach the upper opening end 13 where the water inlet 71 is located.
The floating objects 82 move toward the upper opening end 13d on the opposite side from c, and gather near the overflow port 80 as indicated by arrow E. When the water level of the waste water 81 rises due to water injection from the water inlet 71 and its surface 81a reaches the overflow port 80, the floating objects 82 naturally flow from the overflow port 80 as shown by arrow F, as shown in FIG. It flows out, flows into the drainage ditch 83, and flows into the oil-water separation tank 86.

After a certain period of time, each tank T ₁ , T ₂ , T ₃ , T ₄
The floating objects 82 inside are completely removed, and at that time the solenoid valve 75 is closed by the timer, and each water inlet 71 is closed.
Water injection will stop. With this, circulation tank 1
Removal of floating objects 82 in pump 1 is completed, and pump 1 is restarted.
4 and the motor 28 to wash the car using the purified wash water. In addition, if the amount of water in the circulating water tank 13 has decreased significantly,
Manual valve 76 can be opened to rapidly replenish water from water supply pipe 78.

Next, the oil separation device 8 in the circulation water tank 13
The effect of No. 5 will be explained. Sewage containing a large amount of oil and other floating substances 82 flows from the drain 83 into the first separation tank ST ₁ of the oil-water separation tank 86 through the communication hole 86b, and the oil floats to the surface in the separation tank, and the oil The wastewater 81 with a small amount of water flows in from the lower part of the water pipe 88 and rises, passes over the partition wall 86a and flows from the upper part into the adjacent second separation tank _ST2 , where the same oil-water separation effect is performed and further water is sent. It flows into the third separation tank ST ₃ and the fourth separation tank ST ₄ through the water pipe 88 . As the water level rises, the oil that has surfaced in each separation tank flows out from the overflow port 95 into the drains 96 and 97, and flows into the oil sump tank 90 through the communication hole 90b.
It will be stored here. The sewage 81 stored in the oil tank has a particularly high concentration of oil and contains a lot of floating matter 82 such as garbage and wood chips, so it must be periodically pumped out with a vacuum car. The frequency of pumping is relatively low and it is easy to pump.

On the other hand, the wastewater 81 that does not contain much oil in the fourth separation tank ST ₄ is sucked up by the pump 91 of the drainage device 89 and discharged into the sewer outside. Note that in the discharge, a filter paper is used in conjunction with the discharge, if necessary.

As described above, according to the present invention, the floating matter 82 such as oil can be effectively removed by utilizing the property that oil and dirt float on water without using an expensive oil-water separator or filtration device. It is possible.

As described above, the present invention provides a circulating water tank divided into a plurality of parts by a partition wall to allow wastewater containing floating substances such as oil to flow in and temporarily store the water, and a horizontal position at the bottom of the partition wall. A plurality of communication holes are provided alternately and allow wastewater with few floating substances in the lower part of the wastewater to sequentially flow into a circulation tank on the downstream side, and a plurality of communication holes are provided to allow a small amount of water to drip into the upper opening end of the circulation tank. A water inlet, a water supply valve provided at each water inlet so that the amount of water dripping from the plurality of water inlets can be adjusted independently, and an upper opening end of the circulating water tank on the side opposite to the water inlet. In car washing equipment for large vehicles such as trucks and buses, the system is equipped with an overflow port that allows floating objects on the surface of sewage to flow out naturally from the water inlet due to the wave motion caused by water injection.
With an extremely simple configuration, floating objects such as oil and wood chips that are washed away during vehicle washing can be easily removed in the circulating water tank. This has the effect of preventing scratches and stains, improving cleaning efficiency, and reducing equipment costs.

[Brief explanation of the drawing]

The drawings relate to embodiments of the present invention, and Fig. 1 is a perspective view of a car wash device, Fig. 2 is a perspective view showing the installation state of the operation switch on the inlet side, and Fig. 3 is a fixed water supply pipe, a fountain pipe, and a swinging water pipe. A perspective view showing part of the interrelationship of the devices, Fig. 4 is a longitudinal cross-sectional view of the rotating joint, Fig. 5 is a longitudinal cross-sectional view of the fountain pipe with the nozzle attached, and Fig. 6 is the washing from the nozzle during car washing. A schematic diagram showing the state of water jetting, FIG. 7 is a schematic diagram of the nozzle shown in FIG. 6 when the jetting direction of the cleaning water is switched by the jetting direction switching device, and FIG. 8 is a diagram showing the floating object removing device and Top view of oil/water separator, No. 9
The figures are a vertical cross-sectional view taken in the direction of the - arrow in Fig. 8, Fig. 10 is a perspective view of the floating object removal device, and Fig. 11 is a -XI - arrow view in Fig. 8.
FIG. 13 is a circulating water tank, 13a is a partition wall, 13b is a communication hole, 13c and 13d are upper opening ends, 70 is a floating object removal device, 71 is a water inlet, 73 is a manual valve which is an example of a water supply valve, 80 is a water overflow port , 81 is sewage, 81a is the surface, and 82 is floating matter.

Claims (1)

[Claims] 1. A circulating water tank divided into a plurality of parts by a partition wall to allow wastewater containing floating substances such as oil to flow in and temporarily store the water, and a circulating water tank divided into a plurality of parts by a partition wall, each of which has a horizontal position staggered at the bottom of the partition wall. A communication hole provided in the lower part of the sewage water with few floating substances sequentially flows into the circulating water tank on the downstream side, and a plurality of water inlets configured to drip a small amount of water into the upper opening end of the circulating water tank; A water supply valve provided at each water inlet so that the amount of water dripping from the plurality of water inlets can be adjusted independently, and a water supply valve provided at the upper opening end of the circulating water tank on the side facing the water inlet, A device for removing floating objects in a circulating water tank, comprising: an overflow port through which floating objects on the surface of sewage naturally flow out due to wave motion caused by water injection from the water inlet.