JP2925464B2 - Liquid supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid supply apparatus for supplying a liquid stored in a liquid receiving tank such that the level of the liquid is always kept substantially constant.

[0002]

2. Description of the Related Art As an apparatus of this kind, for example, a petroleum tank having a structure in which a fuel inlet / outlet is provided at the bottom of a closed container type fuel tank and a fuel supply port is closed by a cap whose valve is urged to close. Cartridge fuel tanks mounted on stoves are well known.

In such a cartridge type fuel tank, when fuel kerosene is put into the fuel tank, the fuel tank is turned over so that the bottom of the fuel tank is at the top, the cap is removed, a predetermined amount of kerosene is injected from the fuel inlet / outlet, and then again. The fuel inlet and outlet are closed by fitting a cap, and in this state, the fuel tank is mounted on an oil stove with the bottom of the fuel tank facing down.

[0004] In the fuel tank mounted on the oil stove, a supply hole is opened by a valve-opening operation rod provided on the oil stove, and kerosene in the fuel tank is supplied. When the fuel tank is closed and the fuel tank becomes a closed container, the inflow of air is cut off and the weight from the level of kerosene supplied to the oil stove to the level of kerosene in the fuel tank and the negative pressure formed above it are reduced. The supply of kerosene from the supply hole is stopped in a balanced state.

Further, when the level of kerosene supplied by the use of an oil stove is lowered and the supply hole opened by the valve opening operation rod is exposed to the air above the level of kerosene, air enters through the supply hole. As the negative pressure above the fuel tank weakens and kerosene is supplied from the supply hole to the oil stove, the level of the oil stove rises, the supply hole is closed again, and the supply of kerosene from the supply hole is stopped. Because

[0006]

However, in the above-described structure of the fuel tank mounted on the oil stove, when kerosene is put into the fuel tank, the fuel tank is turned over once, the supply hole is turned up, and then the cap is opened. However, after putting kerosene from here, it has to be closed and then turned over again to be mounted on the oil stove, which is troublesome and has poor workability.

There is also a problem that kerosene is often stained on hands and scattered around when opening / closing the supply hole. Furthermore, when kerosene is put into the fuel tank and closed, the space above the kerosene is at atmospheric pressure, and when this fuel tank is turned over and mounted on a petroleum stove and the supply hole is opened, the inside of the fuel tank is opened. A large amount of kerosene in the fuel tank is supplied from the supply hole until the weight of the kerosene balances the negative pressure formed in the space above the kerosene, so that there is a problem that overflow may occur.

The present invention has been proposed in view of the above problems, and an object of the present invention is to provide a liquid supply apparatus which is simple in operation and has no danger of touching the supplied liquid, scattering or overflowing. It is the purpose.

[0009]

In order to achieve the above object, a liquid supply apparatus according to the present invention provides a liquid processing apparatus for processing a liquid.
A liquid receiving tank for supplying a liquid, and a sealable liquid supply container located above the liquid receiving tank, the liquid supply container having a suction port communicating with the liquid storage unit via an on-off valve, A liquid supply port provided with an on-off valve at the bottom of the liquid supply container, and a lower end opening of the liquid supply port is provided in a liquid receiving tank. The opening of the liquid supply port is closed, the suction port and the negative pressure supply port are opened
Open each on-off valve of, and supply the liquid with the negative pressure from the negative pressure supply device.
Suction port and negative pressure supply port
Close the on-off valve and open the on-off valve on the liquid supply port to supply liquid.
The liquid in the container is supplied into the liquid receiving tank .

Another feature is that a plurality of liquid supply containers are provided in one liquid receiving tank, and the volumes of the plurality of liquid supply containers are made different.

In addition, the liquid supply container has a vertically long cylindrical main body, and upper and lower ends of the main body are closed by flanges.
It is also characterized in that at least a part of the main body is configured to be visible.

Further, the liquid receiving tank may be a sludge tank of a dehydrating device, or the negative pressure forming device may jet a pressurized water from an injection nozzle into the negative pressure forming tube to form a negative pressure in the negative pressure forming tube. One of the features is that a pump is used.

[0013]

According to the liquid supply apparatus of the present invention, when the liquid supply port is submerged in the liquid in a state where the liquid is stored inside the liquid supply container, the liquid level of the liquid in which the liquid supply port is submerged is provided. Decreases,
If the weight of the liquid in the liquid supply container becomes heavier than the upper negative pressure in the liquid supply container, the liquid in the liquid supply container will be in a state until the negative pressure in the liquid supply container and the weight of the liquid are balanced. From the liquid supply port.

Next, when the liquid level of the liquid receiving tank is lowered and the liquid supply port is exposed and opened above the liquid level of the liquid receiving tank, outside air flows into the liquid supply container from the liquid supply port, and the liquid supply port is opened. Reduce the negative pressure above the liquid in the container. As a result, the liquid in the liquid supply container is supplied from the liquid supply port to the liquid receiving tank, and the liquid level in the liquid receiving tank is raised.

When the liquid level in the liquid receiving tank rises and the liquid supply port of the liquid supply container sinks into the liquid, the suction of outside air from the liquid supply port is stopped, and the negative pressure in the liquid supply container decreases. The liquid supply from the liquid supply port is stopped when the weight of the liquid from the liquid surface of the liquid receiving tank to the upper surface of the liquid in the liquid supply container is balanced with the negative pressure in the space above the liquid tank. When filling the liquid supply container with the liquid, first, the on-off valve of the liquid supply port is closed, the liquid supply container is made a closed container, and the on-off valve of the suction port communicating with the liquid reservoir and the negative pressure supply port are closed. Open the on-off valve.

Thereafter, when the negative pressure generated by the negative pressure forming device is applied to the liquid supply container, the liquid in the liquid storage portion is sucked into the liquid supply container from the suction port by the negative pressure. . When a predetermined amount of liquid is sucked into the liquid supply container, the on-off valve of the suction port and the on-off valve of the negative pressure supply port communicating with the liquid reservoir are closed, and the on-off valve of the liquid supply port is opened.

At this time, if the liquid supply port is exposed and opened above the liquid surface of the liquid receiving tank, the liquid in the liquid supply container is supplied from the liquid supply port in the same manner as described above. The liquid level in the liquid receiving tank is raised to a predetermined position. Conversely, when the liquid supply port of the liquid supply container is immersed in the liquid in the liquid receiving tank, the weight of the liquid from the liquid level in the liquid receiving tank to the upper surface of the liquid in the liquid supply container is reduced. The liquid in the liquid receiving tank is sucked back slightly so that the negative pressure in the space above it is balanced.

In the case where one liquid receiving tank is provided with a plurality of liquid supply containers, one of the liquid supply containers supplies the liquid to the liquid receiving tank, and the other liquid supply container is filled with the liquid. If the supply and the filling are alternately performed as described above, the liquid level of the liquid in the liquid receiving tank can always maintain a predetermined liquid level. In this case, if the volumes of the plurality of liquid supply containers are made different, the timing of supply / filling can be arbitrarily set.

Further, the liquid supply container has a vertically long cylindrical main body, and upper and lower ends of the main body are closed by flanges.
When at least a part of the main body is configured to be transparent, it is possible to visually confirm the filling timing and the filling amount of the liquid in the liquid supply container.

Further, in the apparatus in which the negative pressure forming device is constituted by a jet pump which forms a negative pressure in the negative pressure forming pipe by injecting the pressurized water from the injection nozzle into the negative pressure forming pipe, A strong negative pressure can be formed by cavitation due to the jet flow injected into the pipe, and when the liquid in the liquid reservoir is sucked into the liquid supply container by the negative pressure formed by the negative pressure forming device, Even if a part of the sucked liquid is sucked into the negative pressure forming device, this does not damage the negative pressure forming device.

[0021]

An embodiment of the present invention will be described below with reference to the drawings. <Example 1> Fig. 1 shows a schematic configuration of a sludge treatment system for supplying a constant amount of dredged sludge to a dehydrator, and reference numeral 1 in the figure indicates the entire sludge treatment system.

The sludge treatment system 1 includes a sludge tank (liquid storage section) 2 for storing the dredged sludge 5, a vacuum dewatering device 3 for dewatering the sludge in the sludge tank 2, and supplying sludge to the vacuum dewatering device 3. And a negative pressure forming device 6 for supplying a negative pressure to the vacuum dewatering device 3 and the sludge supply container 4.

In the sludge supply container 4, the container body 7 is formed in a substantially cylindrical hermetic shape, and a suction port 9 to which a suction hose 8 is connected is provided at the upper end of the closed container body 7, and a negative pressure supply hose is provided. The suction port 9 and the negative pressure supply port 11 are respectively provided with on-off valves 12 and 13 for opening and closing the passages. The bottom portion 7a of the closed container body 7 is formed in a tapered shape of a downward constriction,
A sludge supply port (liquid supply port) 15 provided with an opening / closing valve 14 at the lower end thereof serves as an allowable upper limit position UL of the sludge (liquid) 17 stored in a sludge storage section (liquid receiving tank) 16 of the vacuum dehydrator 3 described later. It is opened in a state located below.

The vacuum dewatering device 3 installed below the sludge supply container 4 has a horizontal cylindrical filter drum 18 which is driven to rotate by a driving device (not shown), and a suction port inside the filter drum 18. A suction pipe 19 is opened to the vicinity of the bottom of the inner peripheral surface of the filtration drum 18, and provided so as to surround the upper left quadrant of the filtration surface 21 of the filtration drum 18 immediately below the sludge supply port 15 of the sludge supply container 4. And the uppermost position of the filtration surface 21 in the sludge storage portion 16 is the theoretical upper limit position UL of the sludge. Filter surface 21 in part 16
Is set at a position slightly lower than the uppermost position. Also,
The lower end portion 16a of the sludge storage section 16 functions as a scraping plate for scraping off dehydrated sludge.

As shown in FIG. 2, a submersible pump (pressurizing pump) 24 is installed inside a closed vertical cylindrical water storage tank 23 storing water 22 and extends above the water storage tank 23. The distal end of the water discharge pipe 25 of the submersible pump 24 is branched into two branches, and a negative pressure is supplied to the sludge supply container 4 to one end (left side in the figure) of the branched pressure water supply pipes 26. Jet pump M. J. A jet pump M.P that supplies a negative pressure to the filtration drum 18 also at the other end (right side in the figure) of the pressure water supply pipe 26 is provided. J. A negative pressure forming device 6 provided with P and supplying a negative pressure is formed.

Both jet pumps M. J. P has substantially the same structure, so that one jet pump M.P. J. The structure of P will be described. This jet pump M. J. P is a pressure water supply pipe 2 branching out from the tip of the water discharge pipe 25.
6, an injection nozzle 28 for injecting the pressure water metered by a flow rate control valve 27 provided in the pressure water supply pipe 26, and a negative pressure formation installed downstream of the jet flow injected from the injection nozzle 28. A pipe 29, a buffer pipe 31 supporting the negative pressure forming pipe 29 and communicating with the water reservoir 23 by a communication pipe 30, and a negative pressure port 3 opened between the injection nozzle 28 and the negative pressure forming pipe 29.
The circulation path R for circulating and using the water in the water storage tank 23 with the submersible pump 24, the pressure water supply pipe 26, the injection nozzle 28, the negative pressure forming pipe 29, the buffer pipe 31, and the communication pipe 30 is reversed. It is formed in a U-shape.

Note that one jet pump M. J. The buffer tube 31 and the communication tube 30 are omitted by directly projecting the negative pressure forming tube 29 of P into the water storage tank 23. Also,
The negative pressure port 32 opened between the injection nozzle 28 and the negative pressure forming pipe 29 is located above the liquid level L of the water 22 in the water storage tank 23. J. This is to prevent the water 22 stored in the water storage tank 23 from being sucked out of the negative pressure forming pipe 29 through the negative pressure port 32 by the principle of the sunphone when the operation of P is stopped.

Next, the operation of the negative pressure forming apparatus of the present invention through the sludge treatment system 1 having the above-described structure will be described. First, the sludge 35 is stored inside the sludge supply container 4,
The on-off valves 12 and 13 provided on the suction port 9 and the negative pressure supply port 11 are closed, and the on-off valve 14 on the sludge supply port 15 is open.
The liquid level 1 of the sludge 17 in the sludge reservoir 16
The weight of the sludge from 7a to the upper surface 35a of the sludge 35 in the sludge supply container 7 and the negative pressure formed in the space 36 above the sludge are balanced.

Next, in this state, the water in the water storage tank 23 is pressurized by operating the submersible pump 24, and the pressure water supply pipes 26, 26 and the respective flow control valves 27, 27 are passed through the tip of the water discharge pipe 25.
Jet pump M that supplies a negative pressure to the sludge supply container 4 through the J. P and a mixture jet pump M. J. The pressure is supplied to each of the P injection nozzles 28.

The jet pump M. J. When the pressure water supplied to the P injection nozzle 28 is injected into the negative pressure forming pipe 29 as a jet stream, a negative pressure due to cavitation is formed at a portion of the negative pressure forming pipe 29 near the injection nozzle 28. The negative pressure due to the cavity is caused by the fact that the mixed jet flow which is fully spread inside the negative pressure forming pipe 29 acts like a piston which continuously acts inside the negative pressure forming pipe 29 toward the opening at the lower end. It is.

The jet stream discharged from the lower end of the negative pressure forming pipe 29 is recirculated from the buffer pipe 31 into the water storage tank 23 and pressurized again by the submersible pump 24 for use.

Jet pump M. J. When this negative pressure of P is supplied from the negative pressure port 32 to the suction pipe 20 of the filtration drum 18, the inside of the filtration drum 18 becomes a negative pressure, and the sludge 17 is sucked from the filtration surface 21 of the sludge reservoir 16. The solid mass is adsorbed and held on the filtration surface 21. The solid mass adsorbed and held on the filtration surface 21 is further dehydrated when the filtration drum 18 rotates (in the direction of the arrow in the figure) and rotates, and the sludge storage unit 1 is rotated.
6 and is scraped off in a cake shape at the lower end 16a.

The sludge in the sludge storage section 16 is filtered and dehydrated, the liquid level thereof gradually decreases, and the sludge supply port 15 is
7 is exposed on the liquid surface 17a of the container 7, and the sludge supply port 1 is opened.
From 5, outside air flows into the sludge supply container 4 and lowers the negative pressure in the space 36 above the sludge 35 in the sludge supply container 4.
As a result, the sludge 35 in the sludge supply container 4 is
5 and is supplied to the sludge storage unit 16 to raise the liquid level 17a of the sludge storage unit 16.

Here, the sludge supply port 15 is exposed above the liquid level 17a of the sludge 17, and when the outside air flows into the sludge supply container 4 from the sludge supply port 15 and rises in a bubble form, the sludge supply container 4 The solid mass which has settled and has a high specific gravity is stirred, thereby preventing the settled solid mass from clogging the sludge supply port 15.

When the liquid level of the sludge storage section 16 rises and the sludge supply port 15 of the sludge supply container 4 sinks into the sludge 17, the inflow of outside air from the sludge supply port 15 is stopped, and the sludge storage section 16 is stopped.
From the liquid level 17a of the sludge 35 in the sludge supply container 4
When the weight of the sludge 35 up to 5a is balanced with the negative pressure of the space 36 above the sludge, the supply of the sludge from the sludge supply port 15 is stopped.

The amount of sludge stored in the sludge supply container 4 decreases,
When filling the sludge supply container 4 with sludge, the on-off valve of the sludge supply port 15 is closed, and the sludge supply container is made a closed container.
The on-off valve 12 of the suction port 9 and the on-off valve 13 of the negative pressure supply port 11 communicating with the sludge tank 2 installed on the ground where the sludge tank 2 is lower than the sludge supply container 4 are opened. Thereafter, the jet pump M. of the negative pressure forming device 6 for supplying a negative pressure to the negative pressure supply port 11 of the sludge supply container 4. J. P, and the jet pump M.P. J. Is applied to the sludge supply container 4, the negative pressure is applied to the sludge tank 2 from the suction port 9.
Is sucked into the sludge supply container 4.

When a predetermined amount of the sludge 5 in the sludge tank 2 is sucked into the sludge supply container 4, the on-off valve 12 of the suction port 9 and the on-off valve 1 of the negative pressure supply port 11 communicating with the sludge tank 4.
After closing 3, the on-off valve 14 of the sludge supply port 15 is opened. Then, as in the present embodiment, the sludge tank 2 is
When the sludge is in a lower position, the negative pressure when sucking the sludge in the sludge tank 2 into the sludge supply container 4 is sucked at a negative pressure higher than the weight of the sludge sucked into the sludge supply container 4, so that the suction is performed. When the on-off valve 12 of the port 9 and the on-off valve 13 of the negative pressure supply port 11 are closed, the negative pressure in the sludge supply container 4 is higher than the weight of the sludge.

Therefore, when the on-off valve 14 of the sludge supply port 15 is opened and the sludge supply port 15 of the sludge supply container 4 is submerged in the sludge 17 of the sludge storage section 16, the inside of the sludge supply container 4 The sludge 17 in the sludge reservoir 16 is sucked back until the weight of the sludge up to the liquid level 35a of the sludge 35 and the negative pressure in the space 36 above the sludge 35 are balanced.

Conversely, when the sludge supply port 15 is exposed above the liquid level 17 a of the sludge 17 in the sludge storage section 16, the surrounding air is sucked from the sludge supply port 15, and The sludge 35 is supplied from the sludge supply port 15 to the sludge reservoir 16 instead of the outside air, and the liquid level 17a is raised. When outside air flows into the sludge supply container 4 from the sludge supply port 15 and rises as bubbles,
Since the solid matter having a high specific gravity settling in the sludge supply container 4 is stirred, the sludge supply port 15 is formed by the settled solid matter.
Is prevented from becoming clogged.

When the liquid level 17a of the sludge 17 in the sludge reservoir 16 rises in this way and the sludge supply port 15 sinks into the sludge 17, the flow of outside air from the sludge supply port 15 into the sludge supply container 4 is stopped. Liquid level 1 of sludge 35 in sludge supply container 4
The supply of the sludge 35 from the sludge supply port 15 is stopped in a state where the weight of the sludge up to 7a is balanced with the negative pressure of the space 36 above the sludge.

Thereafter, when the sludge 17 in the sludge storage section 16 is filtered and dewatered, the liquid level 17a gradually decreases, and the sludge supply port 15 is exposed above the liquid level 17a of the sludge 17 and opened, as described above. The operation is repeated to keep the position near the allowable upper limit position UL.

In the present embodiment, the jet pump M. J. The pressure water supplied from the pressure water supply pipe 26 is supplied from the injection nozzle 28 to the negative pressure forming pipe 2.
9 is directly injected into the air-fuel mixture forming pipe 4 from the injection nozzle 28 as shown in FIG.
0, the outside air is sucked in from the intake port 41 by the negative pressure formed in the air-fuel mixture forming tube 40, and the air-fuel mixture jet flow is formed by the air-fuel mixture forming tube 40. 29 may be injected. In this case, air bubbles mixed in the mixed jet flowing in the negative pressure forming pipe 29 have a cushioning effect to reduce frictional resistance between the inner surface 29a of the negative pressure forming pipe 29 and the jet water flow. A strong negative pressure can be formed by preventing the flow of the air jet stream from attenuating rapidly.

In this embodiment, one sludge storage unit 1
Although one sludge supply container 4 is provided in 6, two or more sludge supply containers 4 may be provided in one sludge storage unit 16 as shown in FIG. 4. In such a case, any one of the sludge supply containers 4 is used to store the sludge in the sludge reservoir 16.
Is supplied to the other sludge supply containers 4 alternately so as to fill the sludge with the sludge, so that the liquid level 17a of the sludge 17 in the sludge storage section 16 always has a predetermined liquid level. You can keep it. In this case, if the volumes of the plurality of sludge supply containers 4 are made different, the timing of supply / filling can be arbitrarily set.

Second Embodiment In the present embodiment, the sludge supply container 4 in the first embodiment is changed as follows. That is, support brackets 46 are provided above and below a support member 45 erected in the form of a column, and a pipe member 47 having a sludge supply port 15 formed at the lower end is vertically supported over the support brackets 46, 46, Support brackets 46 near the upper and lower ends of the pipe material 47
Are provided in the vicinity of the, and a transparent tubular member 49 forming the body of the sludge supply container 4 is hermetically sandwiched between the flanges 48.

An opening / closing valve 50 of a float ball valve type is provided near the upper end of the pipe member 47, a negative pressure supply port 11 is provided at the upper end of the pipe member 47, and a suction port 9 for sucking sludge is provided in a lower flange 48. And a discharge port 51 are provided to form the sludge supply container 4. The on-off valve 50 of a float ball valve type is a pipe that opens into a valve body housing casing 52 formed near the upper end of the pipe material 47. A spherical ball valve element 54 is accommodated in the port 53 so as to be slidable up and down. The liquid level 35a of the sludge 35 sucked into the sludge supply container 4 rises, and when the ball valve element 54 rises, a negative pressure is generated. The supply port 11 is closed.

The structure is substantially the same as that of the first embodiment, except that an on-off valve (not shown) is provided for each of the suction port 9 and the discharge port 51.

In the sludge supply container 4 formed as described above, the transparent tubular member 49 can be easily removed only by disassembling the flanges 48 at the upper and lower ends.
It is also convenient for transportation, the replacement of the tubular member 49 is very easy, and the sludge 3 in the sludge supply container 4 when used.
5, the state of agitation of the sludge 35 in the sludge supply container 4 due to the outside air sucked from the sludge supply port 15, the timing and amount of filling of the sludge into the sludge supply container 4, and the like, through the transparent tubular member 49. You can see it.

It is to be noted that the same operation and effect can be obtained not only by making the entire tubular member 49 transparent as in this embodiment, but also by forming a transparent portion in a part thereof, for example, a slit shape. You can.

Third Embodiment In the present embodiment, the sludge supply container 4 in the first embodiment is configured as shown in FIG. 6, and the other points are substantially the same as those in the first embodiment. It is effective. The sludge supply container 4 according to the present embodiment has a jet pump M.P. which penetrates a pipe 55 vertically and forms a negative pressure forming means 6 in the pipe 55. J. P is incorporated.

That is, the negative pressure forming pipe 29 is supported at the upper part of the pipe material 55 vertically penetrating the sludge supply container 4, and an injection nozzle for jetting a jet stream to the negative pressure forming pipe 28 is provided at the upper end of the pipe material. , The tube material 55 on the side of the negative pressure forming tube 29
A negative pressure supply port 11 is opened.

In this case, the on-off valve 56 for intermittently supplying the pressurized water supplied from the pressurizing pump 24 to the injection nozzle 28 and the on-off valve 57 provided at the discharge port of the negative pressure forming pipe 55 are provided as described above. This corresponds to the on-off valve 13 provided in the negative pressure supply port 11 in Example 1. When the sludge supply container 4 is configured as in this embodiment, there is an advantage that a place for installing the negative pressure forming means 6 is not required and the entire apparatus can be compactly assembled.

Embodiment 4 As shown in FIG. 7 and FIG. 8, in this embodiment, an on-off valve 12 and a sludge supply port 15 of a suction port 9 of a sludge treatment system 1 for supplying a constant amount of dredged sludge to a dewatering device. Of the on-off valve 14 of FIG. That is, this sludge treatment system 1
The basic configuration is substantially the same as the configuration in the first embodiment. A suction port 9 for sucking the sludge of the sludge tank 5 via a suction hose 8 is provided at the bottom of the sludge supply container 4. The valve 12 is formed by a self-weight closing flap valve 58 at the upper end of the suction port 9, and the sludge supply port 15 is provided with a flap valve 60 with a float 59, and the flap valve 60 with the float 59 is In particular, as shown in FIG. 8, an orifice 61 is formed.

A gauge 62 indicating the negative pressure of the space 36 in the sludge supply container 4 is provided on the side surface of the sludge supply container 14.
Is installed.

Next, the operation of the sludge treatment system 1 configured as described above, particularly the operation of the self-weight closing type flap valve 58 of the suction port 9 and the flap valve 60 with the float 59 of the sludge supply port 15 will be mainly described. I do. First, the sludge supply container 4
Sludge 35 is stored inside sludge supply port 15 and sludge supply port 15 is set in sludge storage section 1 with on-off valve 13 of negative pressure supply port 11 closed.
6 is immersed in the sludge 17, the self-closing flap valve 58 of the suction port 9 provided at the bottom of the sludge supply container 4 is provided with a suction port depending on its own weight and the weight of the sludge from the suction port 9 to the sludge tank 4. 9 is securely closed.

Since the sludge 35 in the sludge supply container 4 and the sludge 17 in the sludge storage section 16 communicate with each other through the orifice 61 of the flap valve 60 in the sludge supply port 15, the sludge 35 in the sludge storage section 16 is connected. Of the sludge from the liquid level 35a of the sludge supply container 4 to the liquid level 35a of the sludge 35 in the sludge supply container 4, and the negative pressure formed in the space above the sludge is balanced.

The liquid level 17 of the sludge 17 in the sludge storage section 16
When the weight of sludge from a to the liquid level 35a of the sludge 35 in the sludge supply container 4 and the negative pressure formed in the space above the sludge are balanced, the flap valve 60 with the float 59 is provided.
No sludge enters or exits from the orifice 61 formed at the bottom.

In this state, the negative pressure from the negative pressure supply means 6 is supplied from the negative pressure suction port 11 to the suction pipe 20 of the filtration drum 18, and the filtration drum 18 filters and dewaters the sludge 17 in the sludge storage section 16. As the liquid level gradually decreases, the sludge supply port 15 is exposed above the liquid level 17 a of the sludge 17. When the sludge supply port 15 is exposed above the liquid surface 17 a of the sludge 17, the outside air flows from the orifice 61 formed in the flap valve 60 with the float 59 through the sludge supply port 15 and the sludge supply container 4.
And lowers the negative pressure in the space 36 above the sludge 35 in the sludge supply container 4, and moves the flap valve 60 from the position shown by the solid line in FIG. 8 by the weight of the float 59 and the weight of the flap valve 60. Sludge supply port 1 by swinging as shown in the imaginary diagram
5 is opened. As a result, the sludge 3 in the sludge supply container 4
5 is supplied from the sludge supply port 15 to the sludge reservoir 16 to raise the liquid level 17a of the sludge 17 in the sludge reservoir 16 from the position A indicated by the imaginary line in FIG.

Here, the sludge supply port 15 is exposed above the liquid level 17a of the sludge 17, and when outside air flows into the sludge supply container 4 from the sludge supply port 15 and rises in a bubble form, the sludge supply container 4 Since the solid mass having a large specific gravity that has settled is stirred, the sludge supply port 15 can be prevented from being clogged by the settled solid mass as in the first embodiment. Then, when the liquid level 17 a of the sludge 17 in the sludge storage section 16 rises and the sludge supply port 15 sinks into the sludge 17, the buoyancy of the float 59 closes the sludge supply port 15 with the flap valve 60.

The sludge supply / container 4 is operated by the operation of the filtration drum 15.
When the storage amount of the sludge 35 decreases and the sludge supply container 4 is filled with sludge, the jet pump M. J. P is operated, and the negative pressure supply port 1 of the sludge supply container 4 is operated.
1 is opened and the jet pump M.1 is opened. J. Is applied to the sludge supply container 4.

The decrease of the sludge 35 in the sludge supply container 4 is caused by the gauge 6 indicating the change of the negative pressure in the sludge supply container 4.
2 can be detected only by visual recognition. That is, as described above, the negative pressure in the sludge supply container 4 is constantly maintained in the sludge storage unit 1.
Since the weight of the sludge from the liquid level 17a of the sludge 17 of FIG. 6 to the upper surface 35a of the sludge 35 in the sludge supply container 4 is balanced, if the amount of the sludge 35 in the sludge supply container 4 decreases and the weight becomes lighter, This is because the negative pressure formed in the space 36 in the sludge supply container 4 is also reduced accordingly.

The on-off valve 13 of the negative pressure supply port 11 is opened, and the jet pump M. J. Sludge supply container 4
The flap valve 58 of the self-weight closing type that closed the suction port 9 by this negative pressure is opened, and the sludge 5 of the sludge tank 2 is sucked into the sludge supply container 4 via the suction hose 8. Because When a predetermined amount of sludge 5 in the sludge tank 2 is sucked into the sludge supply container 4, the on-off valve 1 of the negative pressure supply port 11 is opened.
Close 3. Then, the strong negative pressure sucking the sludge 5 in the sludge tank 2 into the sludge supply container 4 causes the sludge 17 in the sludge storage unit 16 to be discharged when the sludge supply port 15 is submerged in the sludge 17 in the sludge storage unit 16. The negative pressure in the space 36 in the sludge supply container 4 after being sucked back from the orifice 61 is reduced, and the weight of the sludge from the liquid level 17a of the sludge 17 in the sludge reservoir 16 to the liquid level 35a of the sludge 35 in the sludge supply container 4 And the negative pressure formed in the space 36 above the balance.

The sludge supply port 15 is connected to the sludge 1 in the sludge reservoir 16.
7 is exposed above the liquid surface 17a, the outside air is sucked from the orifice 61 to reduce the negative pressure in the space 36 in the sludge supply container 4, and then the negative pressure in the space 36 is further reduced. The valve 60 swings to open the sludge supply port 15, and the sludge 35 in the sludge supply container 4 is supplied from the sludge supply port 15 to the sludge storage section 16, and the liquid level 17 a of the sludge 17 in the sludge storage section 16 is supplied.
Is raised near the upper limit allowable position UL where the sludge supply port 15 is submerged.

When the liquid level 17a of the sludge 17 in the sludge storage section 16 rises and the sludge supply port 15 sinks into the sludge,
The flow of outside air from the sludge supply port 15 into the sludge supply container 4 is stopped, and the weight of the sludge from the liquid level 17a of the sludge 17 in the sludge reservoir 16 to the liquid level 35a of the sludge 35 in the sludge supply container 4 The supply of the sludge 35 from the sludge supply port 15 is stopped in a state where the negative pressure in the space 36 above the balance is balanced.

Thereafter, when the sludge in the sludge storage section 14 is filtered and dehydrated, the liquid level gradually decreases, and when the sludge supply port 15 is exposed above the liquid level 17a of the sludge 17 and opened, the above-described operation is performed. This is repeated and kept near the allowable upper limit position UL. In each of the above embodiments, the case of filtering and dewatering sludge is described as an example. However, the present invention is not limited to such a case, and it can be used for supplying other liquids. The device is a jet pump M. J. It goes without saying that a conventional vacuum pump can be used in addition to P.

[0065]

As described above, the liquid supply apparatus according to the present invention has a liquid receiving tank for supplying a processing liquid to a liquid processing apparatus, and a sealable liquid supply container located above the liquid receiving tank. The liquid supply container is provided with a suction port communicating with the liquid storage section via an on-off valve, and a negative pressure supply port communicating with the negative pressure forming device via the on-off valve. A liquid supply port provided with an opening / closing valve at the bottom is provided, and a lower end opening of the liquid supply port is opened below an allowable upper limit position for storing the liquid stored in the liquid receiving tank.
And open the on-off valves of the suction port and the negative pressure supply port to open the negative pressure
When the liquid is sucked into the liquid supply container by the negative pressure from the supply device,
In both cases, close the on-off valves of the suction port and negative pressure supply port, and
Open the open / close valve of the supply port to allow the liquid in the liquid supply container to enter the liquid receiving tank.
Because are then supplied to the liquid supply port, the suction port,
There is an advantage that the liquid supply container can be easily filled with the liquid simply by opening and closing each of the on-off valves provided at each of the negative pressure supply ports, and the workability can be remarkably improved.

Further, the liquid can be easily filled in the liquid supply container simply by opening and closing the respective on-off valves provided at the liquid supply port, the suction port, and the negative pressure supply port. In the case of a tank, when the liquid supply container is filled with sludge (liquid), the liquid can be prevented from spilling on the hands and skin of the operator and scattered around, thereby greatly improving the safety. There is also an advantage that environmental pollution due to scattering around can be prevented beforehand.

Further, after the liquid is sucked into the liquid supply container by a predetermined amount, when the opening / closing valve of the liquid supply port is opened, the outside air or the liquid in the liquid reception tank is slightly sucked from the liquid supply port to fill the liquid reception tank. Since the weight of the liquid from the liquid surface to the upper surface of the liquid in the liquid supply container is balanced with the negative pressure in the space above it, a large amount of liquid flows out at once when the liquid supply port is opened and overflows There is also an advantage that it can be prevented from being performed.

In addition, in the case where one liquid receiving tank is provided with a plurality of liquid supply containers, one of the liquid supply containers supplies the liquid to the liquid receiving tank, and the other liquid supply container is filled with the liquid. If the supply and the filling are alternately performed as described above, the liquid level of the liquid in the liquid receiving tank can always be maintained at a predetermined liquid level, and there is an advantage that the operation can be performed continuously.

If a plurality of liquid supply containers are provided and the volumes of the plurality of liquid supply containers are made different, the timing of supply and filling can be arbitrarily set in accordance with the operator's procedure. There is an advantage that can be greatly improved.

In addition, the liquid supply container is closed with a vertically long cylindrical main body and upper and lower ends of the main body with flanges.
In the case where at least a part of the main body is configured to be transparent, it is possible to visually check the filling time and the filling amount of the liquid in the liquid supply container. In the case of the configuration using the tank, there is also an advantage that the liquid sucked into the liquid supply container flows into the vacuum pump or the reservoir tank and can reliably be prevented from flowing into the needle bed on the rear side.

In addition, in the case where the liquid supply container is configured so that the vertically long cylindrical main body and the upper and lower ends of the main body are closed with flanges and fixed, the cylindrical shape is obtained only by disassembling the upper and lower flanges. Since the members can be easily removed, there is also an advantage that the transfer is convenient, the replacement of the tubular member can be easily performed, and the maintenance can be easily performed.

In the case of a jet pump in which the pressurized water is jetted from the injection nozzle into the negative pressure forming pipe to form a negative pressure in the negative pressure forming pipe, a strong negative pressure can be formed and the negative pressure can be formed. When the liquid in the liquid reservoir is sucked into the liquid supply container by the negative pressure created by the device, even if a part of the liquid is sucked by the jet pump, the jet pump will not be damaged, There is also an advantage that the performance can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a sludge treatment system according to a first embodiment.

FIG. 2 shows a jet pump M.1 constituting a negative pressure forming device of the sludge treatment system according to the first embodiment. J. It is a longitudinal cross-sectional view of P part.

FIG. 3 shows a jet pump M. which constitutes a negative pressure forming device of the sludge treatment system according to the first embodiment. J. It is sectional drawing of the principal part which shows the modification of P.

FIG. 4 is a sectional view of a main part showing a modification of the liquid supply container of the sludge treatment system according to the first embodiment.

FIG. 5 is a longitudinal sectional view of a liquid supply container part of the sludge treatment system according to the second embodiment.

FIG. 6 is a longitudinal sectional view of a liquid supply container part of a sludge treatment system according to a third embodiment.

FIG. 7 is a schematic configuration diagram of a sludge treatment system according to a fourth embodiment.

FIG. 8 is a sectional view of a liquid supply port of a sludge treatment system according to a fourth embodiment.

[Explanation of symbols]

 4: Liquid supply container 2: Liquid storage unit 6: Negative pressure forming device 9: Suction port 11: Negative pressure supply port 12, 13, 14 ... Open / close valve 15 ... Liquid supply port UL: Storage allowable upper limit position J. P ・ ・ ・ Jet pump

Claims (6)

(57) [Claims] 1. A liquid receiving apparatus comprising : a liquid receiving tank for supplying a processing liquid to a liquid processing apparatus; and a sealable liquid supply container positioned above the liquid receiving tank. A suction port communicating with the liquid reservoir, a negative pressure supply port communicating with the negative pressure forming device via an on-off valve, and a liquid supply port provided with an on-off valve at the bottom of the liquid supply container, The lower end opening of the supply port is opened below the allowable upper limit position of the liquid stored in the liquid receiving tank, and the opening / closing valve of the liquid supply port is opened.
And open the on-off valves of the suction port and the negative pressure supply port to open the negative pressure
When the liquid is sucked into the liquid supply container by the negative pressure from the supply device,
In both cases, close the on-off valves of the suction port and negative pressure supply port, and
Open the open / close valve of the supply port to allow the liquid in the liquid supply container to enter the liquid receiving tank.
Liquid supply apparatus characterized by being configured to supply the. 2. The liquid supply device according to claim 1, wherein a plurality of liquid supply containers are provided in one liquid receiving tank. 3. The liquid supply device according to claim 2, wherein the plurality of liquid supply containers have different capacities. 4. The liquid supply container according to claim 1, wherein the liquid supply container has a vertically long cylindrical main body, and upper and lower ends of the main body are closed by flanges, and at least a part of the main body is visible. 4. The liquid supply device according to any one of 3. 5. The liquid supply device according to claim 1, wherein the liquid receiving tank is a sludge tank of a dehydrating device. 6. The negative pressure forming device according to claim 1, wherein the negative pressure forming device is constituted by a jet pump for forming a negative pressure in the negative pressure forming tube by injecting the pressurized water from the injection nozzle into the negative pressure forming tube.
The liquid supply device according to claim 5.