JPS631628A - Solid liquid transfer device - Google Patents

Abstract

PURPOSE:To secure such a transfer device that is accurate in check valve operation at high efficiency, by installing each check valve in a main tank upper suction port and a subtank upper suction port interconnecting a bottom discharge port, and decompressing or pressurizing a main tank by a level of a liquid and a signal out of a discharge sensor. CONSTITUTION:A four-way selector valve 31 is set to a full-line position, a vacuum pump 30 is operated, the inside of a main tank is decompressed, and a fish body is sucked up as much as the specified quantity together with a liquid from a suction port 9 via a suction side check valve. If so, a level sensor 12 detects this, selecting the four-way selector valve 31 to a chain line position, and compressed air is fed out of a feed-discharge port 7, the fish body is pressure-fed to the inside of a subtank 15 by way of a discharge side check valve 14, and further transferred to the specified position passing through a discharge pipe 16. If it is discharged out of the main tank 8, the four-way selector valve 31 is selected to the full line position by detection of a discharge sensor, making it into a suction process. Thus, suction and discharge processes are automatically repeated by a level of the liquid and a detection signal out of the discharge sensor, thus such a transfer device that is accurate in check valve operation at high efficiency and makes the fish body transferrable without entailing any damage to it.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a solid-liquid transfer device for transferring solids together with a liquid. In particular, the present invention relates to a solid liquid transfer device that can transfer fish bodies, hams, sausages, etc. by immersing them in liquid without dissolving them, and also transfers easily damaged soft solid substances without damaging them.

[Prior art] A device known as a static displacement fish pump reduces the pressure in a sealed tank, sucks fish together with water into the tank through a check valve on the suction side, and then pumps the fish into the main tank. Air is supplied and pressurized, and the fish are discharged together with water through a check valve on the discharge side.This device was proposed by the inventor of the present invention and is widely used in the industry.

However, the conventional device shown in FIG. 5 sucks fish water into the main tank 1, and when the main tank 1 is full, it then pressurizes and transfers the solid matter.

ing. In this device, the check valve 2 on the suction side closes immediately after switching from the solid matter suction process to the discharge process. Further, when the discharge process is completed, the next step is switched to the suction process, and immediately after that, the check valve 3 on the discharge side closes. As shown in FIG. 5, the structure of the check valve includes the swing closure 4 as described above. When the swinging closure 4 closes, it may pinch and damage the fish body, or it may obstruct the closing operation of the check valve, causing it to become inoperable, making transfer impossible.

If the fish is small and flexible (such as sardines),
The swinging closure can cut the fish body and close the check valve, but
In the case of hard fish such as large salmon and cod, the commercial value is significantly reduced because the letter "i" is added. In particular, since each large, high-quality fish is quite expensive, it is highly desirable to minimize damage even if the amount is small.

Furthermore, this static displacement type fish pump operates in a batch discharge operation, in which no discharge is performed while suctioning into a closed tank, and no suction is performed while discharging, so the next process is similar to sorting fish or cutting with a general knife. If a continuous supply of a certain amount is required, a stock tank or discharge device is required.

The inventor has also proposed a fish pump that has multiple tanks and drains the other tank while suction is being taken into one tank, but if the capacity is large and such a transfer amount is not required, It becomes uneconomical.

[Purpose of the present invention] An object of the present invention is to propose a solid-liquid transfer device that can transfer a large fish body without being pinched and closed by a check valve and without causing damage.

Another important object of the present invention is to propose a transfer device that allows reliable check valve operation and highly efficient transfer.

Furthermore, an important objective of the pond of the present invention is to propose a transfer device with a relatively dilute discharge concentration and a uniform discharge rate.

[Means for solving conventional problems] A suction port is opened at the top of a main tank with a sealed structure, a discharge port is opened at the bottom of the tank, and a suction pipe is communicated with the suction port. The other aperture serves as the suction port, and a check valve on the suction side is provided at the suction port at the top of the main tank.

A communication pipe is connected to the discharge port of the main tank, and the communication pipe is piped upward and communicates with the upper part of the sealed sub-tank via a suction side check valve.

A discharge pipe is connected to the bottom of the sub-tank, and this discharge pipe is extended to a predetermined position.

An exhaust port is opened at the top of the main tank, and an air supply port is opened at an arbitrary position.

The main tank is provided with a level sensor that detects the upper limit level of the suction process, and a discharge sensor that detects the end of the discharge process in the sub-tank.

[Operation] The operation of the solid liquid transfer device will be explained based on FIG. 1 showing a preferred embodiment of the present invention.

The four-way switching valve 31 is switched to the 'A' position in the figure, the vacuum pump 30 is operated, and air is discharged from the supply/exhaust lower which serves as an exhaust port and an air supply port to reduce the pressure in the main tank 8. The solids are sucked into the depressurized main tank 8 through the suction port 9 together with the liquid through the suction pipe 10 and the suction side check valve 11 . When a predetermined amount of liquid and solid matter is sucked into the main tank 8, the level sensor 12, which is a suction sensor, detects this, and the four-way switching valve 31 is switched to the first position.
Switch to the position indicated by the chain line in the figure to supply compressed air from the supply/exhaust lower. The inside of the main tank 8 is pressurized, and the solids and liquid are forced into the sub tank 15 through the communication pipe 13 and the discharge side check valve 14 . Furthermore, sealed sub-tank 1
5 is pressurized by the liquid and solid material being sent in, and this pressure transfers the solid material and liquid to a predetermined position via the discharge pipe 16.

When the liquid and solids are discharged from the main tank 8,
This is detected by a discharge sensor (not shown), and the four-way switching valve 31 is then switched to the solid line position shown in the figure again to switch to the suction process in which air is discharged from the supply/exhaust lower part of the main tank 8.

Thereafter, the suction process and the discharge process are automatically repeated based on the detection signals of the suction and discharge amount sensors.

[Preferred embodiment code] Hereinafter, one embodiment of the present invention will be described based on the drawings.

The solids liquid transfer device shown in FIG. a discharge pipe 16, a suction side check valve 11, a discharge side check valve 14, a pressure reducing means for discharging the air in the main tank 8, and a pressurizing means for pressurizing pressurized air into the main tank 8. , a level sensor 12 that is an inhalation sensor that detects the end of the inhalation process, a discharge sensor that detects the end of the ejection process, and a switch that controls the operation of the depressurizing means and the pressurizing means. equipped with the means.

The main tank 8 has a volume capable of storing the required amount of liquid and solids, has an intake pipe 10 connected to it by penetrating the upper part downward, and further has an exhaust port and an air supply port in the upper part. A lower air supply/exhaust portion serving as a dual purpose is opened, and one end of the communication pipe 13 is connected to a discharge port 28 opened at the bottom.

The suction pipe 10 is for sucking solid matter and liquid into the main tank 8, and in a sealed and depressurized state, the suction pipe 10 is connected to the suction port 9 at the tip.
The liquid and solid matter are sucked in and transferred to the main tank 8. The opening end of the suction pipe 10 in the main tank is opened downward, and a suction side check valve 11 that opens only during the suction process is provided in this portion.

One end of the communication pipe 13 is connected to the bottom of the main tank 8, and the communication pipe 13 is piped upward and has a U-bent upper end to form the sub tank 15.
The discharge side check valve 14, which is opened only during the discharge process, is connected to the open end.

Both check valves 11.14 on the suction side and discharge side are connected to the tank 8.1.
This is a normally closed valve that opens vertically or diagonally downward from the top of the valve 5 and maintains a normally closed state.

As shown in FIG. 2, the check valves 11 and 14 include a swing closure 17 that swings to open and close the open end of a downward pipe that is a suction pipe or a communication pipe, and a swing closure 17 that is in a normally closed state. It consists of a weight 18 that closes the valve. The weight 18 is fixed to the end of an arm 19 extending from the pivot of the swing closure 17 to the opposite side, and closes the swing closure 17 with its weight.

The swing closure 17 is rotatably supported on a shaft 36 fixed to the open end of the suction pipe or the communication pipe. The swing closure 17 rotates to open and close the front end of the pipe.

The weight of the M weight 18 is determined to be such that the valve opens when a liquid and a solid substance are introduced from the pipe or when a solid substance is placed on the swing closure 17 . Therefore, the suction side check valve 11 is switched from the open state to the closed state when switching from the suction process to the discharge process, and the discharge side check valve 14 is switched from the open state to the closed state when switching from the discharge process to the suction process. Switched to valve state. In other words, the suction side check valve 11 is opened only during the suction process, and the discharge side check valve 14 is opened only during the discharge process.

As shown in FIG. 2, the swing closure 17 just before closing
When a fish body flows upward, the fish body passes vigorously through the swing closure member 17 having a downward opening, so that it is not caught by the swing closure member 17. Immediately after the fish has passed, the swing closure 17 is closed by a weight 18.

The sub-tank 15 has a discharge pipe 16 connected to its lower part, a water supply port 20 opened at a required position, and an exhaust port 21 opened on the side for discharging internal air.

The water supply port 20 is connected to the discharge side of the water return pump 22 , and the suction side of the water supply pump 22 is connected to the return water tank 24 of the separator 23 . The return water pump 22 supplies liquid from the return water tank 24 to the sub-tank 15 and transfers the solids in the sub-tank 15 to the separator 23 together with the liquid. The water pump 22 supplies water into the sub-tank 15 during the suction process when the discharge-side check valve 14 closes, and discharges solid matter from the sub-tank 15.

A drain port 35 is opened in the water tank 24.
The water surface level is limited to a certain range by overflowing from the water.

The exhaust port 21 is opened in the upper part of the float chamber 26 through a perforated plate 25 through which gas passes but solid matter does not pass. The exhaust port 21 is opened and closed by a float valve 27, and the float valve 27 opens only when the water level in the sub-tank 15 is below a predetermined level.

Air is sent into the sub tank 15 after the liquid is transferred from the main tank 8. That is, at the end of the discharge process,
After all the liquid in the main tank 8 is sent to the sub tank 15, air may be sent from the main tank 8 to the sub tank 15.

When air is supplied to the sub-tank 15 and the water level falls, the float valve 27 opens. When the return water pump 22 supplies water to the sub-tank 15 while the float valve 27 is in a state in which the float valve 27 is in a state that the float valve 27 is open, the air in the sub-tank 15 is discharged from the exhaust port 21.

The suction side check valve 11 and the discharge side check valve 14 can be smoothly opened and closed in the air and can be closed without pinching the fish body. As shown in FIG. 2, when a fish is placed on the swing closure 17 in the air, the valve opens due to the weight of the fish and closes after the fish falls. When the swing closure 17 is in the water, a fish body with a specific gravity close to 1 floats in the water and does not sink vigorously due to its own weight, and therefore does not quickly pass through the swing closure 17 due to its own weight.

When the discharge side check valve 14 is completely closed, the air in the sub-tank 15 will not flow back into the main tank 8 and be sucked in during the suction process, and a predetermined amount of air will be stored in the upper part of the sub-tank 15. . However, in the unlikely event that the discharge side check valve 14 cannot be completely closed during the suction process, air will be sucked out from the sub tank 15 into the depressurized main tank 8.
The water surface level of the sub tank 15 temporarily rises.

However, the air sucked into the main tank 8 is sent into the sub-tank 15 during the discharge process, lowering the water level of the sub-tank 15 and exposing the discharge-side check valve 14 to the air.

In order to send the air sucked into the main tank 8 to the sub tank 15, use a timer in the discharge sensor to maintain the main tank 8 in a pressurized state for a certain period of time and make the discharge time somewhat longer than the liquid discharge time. is good.

During operation, liquid containing bubbles is supplied from the main tank 8 to the sub-tank 15, and the water level of the sub-tank 15 gradually falls. Exhaust port 21 is main tank 8
The water level of the sub-tank 15 is maintained within a certain range by discharging the air sent from the sub-tank 15.

The float valve 27 is not necessarily required for the exhaust port 21. The sub-tank 15 shown in FIG. 3 has an exhaust port 21 opened near the water surface level.

The exhaust port 21 has a small opening area and has a low resistance to air passage, but a high resistance to water passage. Therefore, when water is supplied to the sub-tank 8 and the exhaust port 21 is submerged under the water surface, some water will be drained, but the amount is small, and as a result,
The pressure inside the sub-tank 15 hardly decreases. Communication pipe 1
When air is pumped in from the firefly and the water level falls, and the exhaust port 21 enters the air, the air from the fireflies is exhausted and the water level quickly rises.

The exhaust port 21 is opened at a position where the discharge side check valve 14 can float in the air.

The suction side check valve 11 provided in the main tank 8 completes the suction process and is closed in the air while it is in the air. Therefore, it is preferable that the level sensor 12 serving as the suction sensor completes the suction process before the suction side check valve 11 is submerged in water.

A timer 29 can be used as the discharge sensor.

When the timer 29 is a discharge sensor, pressurized air is supplied to the main tank 8 for a certain period of time. The time it takes for the liquid and solids in the main tank 8 to be completely removed varies depending on the transfer distance, lift height, solids concentration in the main tank 8, and the size of the solids, but it is does not change.

Therefore, the liquid containing solids in the main tank 8 can be discharged by injecting pressurized air for a certain period of time. (However, in reality, some solids and liquid remain in the main tank, air rises in the communication pipe 13, and the liquid moves up and down in the communication pipe.) Also, air flows from the main tank 8 to the sub tank 15. Since there will be no adverse effect on the solid matter transfer even if the solid matter is fed, the time set on the timer is set to be somewhat longer than the time for discharging the liquid.

Any device that can pressurize air into the main tank 8 can be used as the pressurizing means, and any device that can exhaust air from the main tank can be used as the depressurizing device. In FIG. 1, the pressurizing means and the depressurizing means are composed of one vacuum pump 30 and a four-way switching valve 31. That is, the suction side of the vacuum pump 30 is connected to the main tank 8 to serve as a pressure reducing means, and the discharge side is switched to the main tank 8 to serve as a pressurizing means. The four-way switching valve 31 has a level sensor 12 which is an intake sensor.
and is switched by a switching circuit 32 controlled by the output of a timer 29 which is a discharge sensor.

[Operation] The solid matter liquid transfer apparatus shown in FIG. 1 is operated under the following conditions.

(2) Suction process The vacuum pump 30 discharges air from the supply/exhaust lower part of the main tank 8 via the four-way switching valve 31 to reduce the pressure, and fish water is sucked into the main tank 8 via the suction pipe IO. (In this case, the discharge side reverse ratio valve 1 in the sub tank
4 closes automatically. ) A predetermined water surface level is detected by the level sensor 12, which is an inhalation sensor for detecting the upper limit level in the main tank 8, and the four-way switching valve 31 is switched based on the signal to perform the discharge process. The upper limit level is the highest water surface level at which the swing closure 17 of the suction side check valve 11 is not submerged.

(2) Discharge process Compressed air is pressurized from the supply/exhaust lower, and anhydrous water in the main tank 8 is supplied into the sub-tank 15 via the communication pipe 13 and the discharge-side check valve 14. In this case, since the exhaust port 21 via the float valve 27 is open until the sub-tank 15 reaches a predetermined level, air is exhausted from the exhaust port 21 and the water surface level rises. Not pressurized. When a predetermined level is reached, the exhaust port 21 is closed, and the air above the sub-tank 15 is compressed, while the anhydrous level rises slightly. At the same time, since the inside of the sub-tank 15 is pressurized, anhydrous water is pumped through the discharge pipe 16 to a location higher than the sub-tank 15 and to a remote location. Eventually, as all of the anhydrous in the main tank 8 approaches a state where it is discharged, the air rises in the upwardly-flowing communicating pipe 13, and the anhydrous in the negative part begins to move up and down within the communicating pipe 13. . When compressed air starts to be supplied into the sub-tank 15, the level of anhydrous water in the sub-tank 15 drops slightly, and when it drops to the lower limit level, the float of the float valve 27 drops and the compressed air is discharged from the exhaust port 21. Ru. From the detection by the level sensor 12 at the end of the suction process, the time until compressed air starts to be discharged from the exhaust port 21 is measured, and the time is set as the time required for the discharge process by the timer 29, and the timer signal is used to The four-way switching valve 31 is switched to the suction process again.

As with the upper limit level position in the main tank 8, the setting position of the lower limit level in the sub tank 15 is preferably the highest water level at which the swing closure 17 of the discharge side check valve 14 is not submerged.

In addition to using the timer 29 as the lower limit level sensor, an electrode type level sensor (not shown) may be provided in the sub-tank, and a signal from the level sensor may be used to switch to the inhalation process.

■ Continuous discharge operation Water and fish bodies are separated by a separator 23 installed at the tip of the discharge pipe 16, the fish bodies are discharged, and the water is stored in the water tank 24 below. The pump 22 supplies water to the sub tank 15 during the suction process of the main tank 8. The return water pump 2 is activated by the signal from the timer 29 indicating the end of the discharge process.
2 is started, water is supplied and pressurized to the sub-tank 15, and the water is discharged through the discharge pipe 16. Inside subtank 15,
Since the fish bodies are immersed together with a large amount of water, even during the discharge process of the main tank 8, the fish bodies are not immediately discharged through the discharge pipe 16, and the concentration of anhydrous water in the discharge pipe 16 is lower than that in the sub tank 15. It is actually more dilute than its anhydrous concentration. This tendency becomes more pronounced as the fish body becomes larger compared to the diameter of the discharge pipe 16. Therefore, even at the end of the discharge process, fish bodies remain in the sub-tank 15 at a high concentration, so by pressurizing water through the water supply port 20, the fish bodies can be continuously discharged through the discharge pipe 16.

This device is the most suitable feeding device when the next process of this device requires continuous feeding of a fixed amount of fish such as sizing, processing, etc. (which is usually the case most often).

[Other Examples Solid ¥ shown in Figure 4! IJ liquid transfer liquid feeding device entry tube 1
Two main tanks 8 are connected in parallel through a communication pipe 13, and when the negative main tank 8 is in the suction process, the other main tank 8 is in the discharge process to continuously pump out solids. Transport. In the two main tanks 8, the suction process and the discharge process are not completed at the same time, and the suction process usually takes a long time. Therefore, in order to independently inhale and discharge each main tank 8, a compression pump 33 as a pressurizing means and a vacuum pump 34 as a depressurizing means are provided.

[Effects] The solid liquid transfer device of the present invention includes a sub-tank provided on the discharge side of the main tank, a communication pipe connecting the sub-tank and the main tank, and a communication pipe connecting the communication pipe to the upper part of the sub-tank. - A discharge side check valve is provided at the upper opening, and the suction pipe connected to the main tank is also connected to the upper part of the main tank, and a suction side check valve is installed at the opening. ·ing. That is, the suction side check valve is placed at the top of the main tank, and the discharge side check valve is placed at the top of the sub tank. The upper parts of the main tank and sub-tank can store air when the check valve closes, allowing the valve to close in air. Check valves that close in air prevent solids from stagnation in the check valve.
After this passes, the valve can be closed, and solid objects will not be caught between the valves and the valve will close. Particularly preferably, solid objects such as large, high-grade fish, which are expensive, are less likely to get caught in the check valve. Therefore, it is possible to reduce the deterioration of the product quantity due to damage to the solids and to transfer all the fish with little bias while maintaining a high quality state, which is an extremely important feature for this type of device.

In addition, since the check valve does not close due to solid matter being caught in the valve, the valve closes reliably, and the drop in transfer efficiency due to leakage when the valve closes is minimized, making it possible to achieve high-efficiency transfer.

Furthermore, since the solids cannot be directly carried out from the main tank and are discharged through the sub-tank, they can be discharged in a relatively dilute state by supplying water to the sub-tank, and the discharge 1
If you can make it uniform, you can also realize the features.

By the way, when this device is used to transport fish, the concentration of anhydrous water discharged from the communication pipe is relatively dilute immediately after switching to the discharge process, and increases as the discharge process progresses, and the concentration of anhydrous water discharged from the communication pipe is relatively dilute as the discharge process progresses. There is a considerable difference in concentration. The concentration difference is related to the diameter of the communicating tube and the length of the fish body.The fish bodies are aligned in the length direction of the communicating tube and are transferred, but when being sucked into the communicating tube, the fish body is It is difficult to eject because it encounters resistance at some parts of the body. Therefore, the water that flows easily flows into the communication pipe first, and as the anhydrous level falls, the concentration in the main tank becomes high.As the water surface level falls, the concentration inevitably becomes high, and the initial stage of the discharge process In the final stage, a considerable difference in concentration occurs.

However, in the transfer device of the present invention, the fish bodies supplied into the sub-tank, which has a much larger diameter than the communication pipe or the discharge pipe, are constantly immersed in water at a certain level and are pressurized by the waterless discharge process. Since it is discharged from the discharge pipe, it is discharged at a relatively uniform concentration. That is, when it is discharged from the main tank, the anhydrous level drops and it is forcibly discharged at a high concentration, but it is constantly immersed in the sub-tank with a large amount of water and pressurized at a constant pressure. Therefore, there is little difference in the concentration of anhydrous ratio between the beginning and the end of the discharge process.
It is diluted with a large amount of water at the beginning of the discharge process, and has a uniform concentration.
It is discharged through a discharge pipe.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a solid liquid transfer device showing one embodiment of the present invention, FIG. 2 is a sectional view showing an example of a check valve, and FIG.
The figure is a sectional view showing another specific example of the sub-tank, FIG. 4 is a schematic sectional view of a solid liquid transfer device showing an embodiment of the pond of the present invention, and FIG. 5 is a schematic sectional view of a conventional solid liquid transfer device. figure,
FIG. 6 is a sectional view of the check valve of the device shown in FIG. 5. 1. Main tank, 2. Check valve, 3. Check valve, 4. Swing closure, 5. Four-way switching valve, 6. Vacuum pump, 7. Supply/exhaust port, 8. Main tank, 9...intake port,
10... Suction pipe, 11... Suction side check valve, 12... Level sensor, 13... Communication pipe, 14... Discharge side check valve, 15
...Subtank, 16..Discharge pipe, 17..Swing closure, 18..Weight, 19..Arm, 20..Water inlet, 21..Exhaust port, 22..Return water pump.
23... Separator, 24... Return water tank, 25
...Perforated plate. 26...Float chamber, 27...Float valve, 28...
Discharge port, 29...Timer, 30...Vacuum pump, 31...Four-way switching valve, 32...Switching circuit, 33
...Compression pump, 34..Vacuum pump, 35..Drain port, 36..Shaft. Figure 2 Figure 3 Figure 5 Figure 6

Claims (4)

[Claims] (1) Main tank and sub tank that are airtightly sealed,
A communication pipe connecting both tanks, a suction pipe connected to the main tank, a discharge pipe connected to the sub tank, a suction side check valve, a discharge side check valve, and means for reducing the pressure of air in the main tank. , a pressurizing means that pressurizes air into the main tank, a suction sensor that detects the end of the suction process, a discharge sensor that detects the end of the discharge process, and the suction sensor and the discharge sensor operate the depressurization means and the pressurization means. A solid liquid transfer device having the following configurations (a) to (g). (a) The suction pipe has a solid material suction port opened at one end, and the other end passes through the upper part of the main tank with a closed structure and is connected thereto, and the tip opening is opened only during the suction process. A suction side check valve is connected to the valve. (b) The main tank has a discharge port opened at the bottom, and one end of a communication pipe piped upward is connected to this discharge port,
The other end of this communication pipe passes through the upper part of the sub-tank, and a discharge side check valve that opens only during the discharge process is connected to the communication pipe opening in the upper part of the sub-tank. (c) The main tank has an exhaust port at the top and an air supply port at an arbitrary position. (d) The main tank is equipped with a level sensor that is an inhalation sensor that detects the upper limit level of liquid and solid matter inhaled during the inhalation process. (e) A discharge pipe is connected to the bottom of the sub-tank, and this discharge pipe is extended to the transfer location. (f) The exhaust port of the main tank is connected to a depressurizing means for exhausting the air in the main tank, and the air supply port is connected to a pressurizing means for pressurizing compressed air. (g) The pressure in the main tank is reduced by discharging the air in the main tank by the pressure reducing means, and the solid matter is sucked into the main tank through the suction pipe along with the liquid from the suction port, and the suction sensor causes the switching means to activate the pressure reducing means. Switch to operation of the pressurizing means, pressurize compressed air into the main tank from the air supply port, pressurize the solids and liquid in the main tank, and supply it to the sub tank via the communication pipe, and then pressurize. The solids are transferred to a predetermined location along with the liquid via the discharge pipe by the pressure inside the sub-tank, and the pressurizing means is switched to the depressurizing means again based on the signal from the discharge sensor, and air is discharged from the exhaust port. A solid-liquid transfer device characterized in that the solid-liquid transfer device is configured to transfer the solid substance together with the liquid by repeating the suction and discharge steps. (2) The solid liquid transfer device according to claim 1, wherein the opening end of the suction pipe in the main tank is opened downward, and a suction side check valve is connected to this opening end. (3) The solid-liquid transfer device according to claim 1, wherein the opening end of the communication pipe in the sub-tank is opened downward, and a discharge side check valve is provided at this opening end. (4) The solid liquid transfer device according to claim 1, wherein the two main tanks are connected in parallel to each other via a suction pipe and a communication pipe.