KR200366720Y1 - apparatus for receiving and feeding liquid between one tank and the other thank with using a vacuum pump - Google Patents

Abstract

The present invention relates to a device that can exchange liquids between tanks using a vacuum pump, the first tank (10); Second tank 20; A vacuum pump 30; Main vacuum line 40; One end is connected to the main vacuum line, the other end is connected to the upper end of the first tank, and the first sub vacuum line 41 with the first vacuum control valve V1 interposed therebetween is connected to the upper end of the second tank. A second vacuum line 42 having a second vacuum control valve V4 interposed therebetween; One end is connected to the bottom of the first tank, the other end is connected to the upper end of the second tank, the first liquid transfer valve (V3) interposed in the middle of the first transfer connector for transferring the liquid from the first tank to the second tank 50; One end is connected to the bottom of the second tank, the other end is connected to the upper end of the first tank, the second liquid transfer valve (V6) interposed in the middle of the second transfer connector for transferring the liquid from the second tank to the first tank 51; A first air inlet line 60 connected to an upper end of the first tank and having a first air inlet valve V2 interposed in the middle to introduce air into the first tank; A second air inlet line 61 connected to the upper end of the second tank and introducing air into the second tank with a second air inlet valve V5 interposed in the middle; Vacuum sensors (S1, S2) for detecting the degree of vacuum in the first tank and the second tank; And a known control device.

Description

Apparatus for receiving and feeding liquid between one tank and the other thank with using a vacuum pump}

The present invention relates to a device that allows the exchange of liquids between tanks using a vacuum pump.

Conventional tank-to-tank liquid transfer is performed by a general pump for transferring liquid. This general pump is interposed in the middle of a connecting pipe connected to both ends of the first tank and the second tank installed on the ground of equal height so as to distribute the liquid, and serves to transfer the liquid in the first tank to the second tank.

One end of the connecting pipe is normally connected to the bottom of the first tank on the discharge side, and the other end is connected to the top of the second tank on the suction side.

In this state, when the general pump transfers all of the liquid in the first tank to the second tank, the liquid remaining flow rate becomes a small amount in the first tank and finally, the air remaining in the first tank together with this small amount of liquid remaining amount. Is sucked in and the seal of this general pump is damaged, so that the liquid of the first tank cannot all be transferred to the second tank.

In addition, when the first tank and the second tank is a tank having a high height, the head of the pump is so large that a large capacity general pump is required.

To prevent this, if the second tank is installed at an installation height lower than the installation height of the first tank, natural discharge may be possible without using a general pump, but the installation position of the first tank may be higher than a certain height from the ground. If not, the second tank is to be installed in a pit under the ground formed by digging the ground, so the installation cost is increased, and if the conveying liquid is a chemical or a solvent, soil contamination due to leakage of the chemical or the solvent And a problem that causes a safety problem.

As another prevention method, the installation height of the first tank and the installation height of the second tank are the same, and both ends of the connecting pipe with the general pump interposed are connected to the lower end of the first tank and the lower end of the second tank. However, the second tank that receives the liquid from the first tank has a liquid level that is high enough to receive the liquid and is affected by the specific gravity due to the liquid introduced into the second tank. Only the water level can accept the liquid from the first tank, so that there is always a residual amount of liquid to be transferred to the first tank.

As another prevention method, the installation height of the first tank and the installation height of the second tank are the same, and both ends of the connecting pipe are connected to the lower end of the first tank and the lower end of the second tank, and compressed to the first tank. There is a method of supplying air to transfer the liquid in the first tank to the second tank, but since the high pressure compressed air is supplied to the first tank, the liquid leaks from the first tank when the liquid to be transported is a dangerous substance. Can be generated, there is a problem with safety, and also the liquid to be delivered to the compressed air is accompanied, there is a problem that a separate facility for separating the compressed air and the liquid to be transported is required when recovering the compressed air have.

In addition, in order to perform the liquid exchange between the tanks required in the washing and drying process, chemical treatment process, etc., two separate connectors connecting the tank and the tank and a separate intervening between the two separate connectors Two general pumps are required, which requires a large installation cost.

The present invention has been made to solve the above-described problems, and is not affected by the head, and when transferring the liquid from the first tank in which the liquid is stored to the second tank emptied, all the liquid in the first tank to the second tank. In addition to being able to transfer, it is an object to provide a liquid transfer device between tanks where only one vacuum pump is needed to transfer liquid from the first tank to the second tank and from the second tank to the first tank. .

1 is a conceptual diagram of an embodiment according to the present invention.

The present invention to achieve the above object, the first tank; Second tank; Vacuum pump; A main vacuum line having one end connected to the vacuum pump to selectively suck air in the first and second tanks to vacuum the inside of the first and second tanks to a predetermined pressure; A first sub vacuum line having one end connected to the main vacuum line and the other end connected to an upper end of the first tank and interposed with a first vacuum control valve; A second secondary vacuum line having one end connected to the main vacuum line and the other end connected to an upper end of the second tank, and having a second vacuum control valve interposed therebetween; A first end connected to an underside of the first tank and the other end connected to an upper end of the second tank, and interposed with a first liquid transfer valve to selectively transfer liquid from the first tank to the second tank Transfer connector; A second end having one end connected to a bottom surface of the second tank and the other end connected to an upper end of the first tank, and a second liquid transfer valve interposed therebetween to selectively transfer liquid from the second tank to the first tank. Transfer connector; A first air inlet line connected to an upper end of the first tank, the first air inlet valve being interposed between the first air inlet valves and selectively introducing air into the first tank; A second air inlet line connected to an upper end of the second tank, the second air inlet valve being interposed in the middle to selectively pressurize the atmosphere in the second tank; A first vacuum sensor for detecting a degree of vacuum inside the first tank; A second vacuum sensor which detects a degree of vacuum inside the second tank; And a known control device for selectively opening and closing the various valves and the vacuum pump based on values detected by the first and second vacuum sensors.

Hereinafter, the liquid transfer device between the tanks of the embodiment according to the present invention with reference to Figure 1, as follows.

The liquid transfer device between the tanks shown in FIG. 1 is generally designated as 100.

The liquid transfer device 100 includes a first tank 10; Second tank 20; A vacuum pump 30; One end is connected to the vacuum pump 30 to selectively suck air in the first and second tanks to vacuum the inside of the first and second tanks 10 and 20 to a predetermined pressure ( 40); A first sub vacuum line 41 having one end connected to the main vacuum line 40 and the other end connected to an upper end of the first tank 10 with a first vacuum control valve V1 interposed therebetween; A second sub vacuum line 42 having one end connected to the main vacuum line 40 and the other end connected to an upper end of the second tank 20 with a second vacuum control valve V4 interposed therebetween; One end is connected to the bottom of the first tank 10, the other end is connected to the upper end of the second tank 20, the first liquid transfer valve (V3) is interposed in the middle of the first tank (10) A first transfer pipe (50) for transferring the liquid to the second tank (20); One end is connected to the bottom of the second tank 20, the other end is connected to the upper end of the first tank 10, the second liquid transfer valve (V6) is interposed in the middle of the second tank 20 selectively A second transfer pipe 51 for transferring liquid from the tank to the first tank 10; A first air inlet valve 60 connected to an upper end of the first tank 10 and having a first air inlet valve V2 interposed therebetween to selectively introduce air into the first tank 10. ; A second air inlet line 61 connected to an upper end of the second tank 20 and selectively introducing air into the second tank 20 through a second air inlet valve V5 interposed therebetween. ; A first vacuum sensor S1 for detecting a degree of vacuum inside the first tank 10; A second vacuum sensor S2 for detecting a degree of vacuum inside the second tank 20; And a known control device (not shown) for selectively opening and closing the various valves and the vacuum pump 30 based on values detected by the first and second vacuum sensors S1 and S2.

Herein, the control device may include various valves and sensors, an interface connected to the vacuum pump, an input unit for inputting various kinds of information and predetermined set values, an output unit for displaying various kinds of information and predetermined set values, and various kinds of information and the interface. It is a well-known control apparatus which transmits a predetermined | prescribed set value to the said input part and an output part, and contains a control part which controls opening and closing of various valves and operation of a vacuum pump according to the received information.

In addition, it is obvious to those skilled in the art that a liquid level sensor or a flow meter may be provided in each tank and connected to a known control device in order to grasp the liquid transfer amount.

The liquid transport apparatus 100 configured as described above may operate as follows.

1.When transferring liquid from the first tank to the second tank

First, the control device operates the vacuum pump 30 and opens the second vacuum control valve V4 to increase the degree of vacuum inside the second tank 20. Next, the control device determines that the degree of vacuum inside the second tank 20 reaches a predetermined degree of vacuum, and then operates the vacuum pump 30 after judging from the signal detected by the second vacuum sensor S2. Stopping and closing the second vacuum control valve (V4) to maintain the vacuum degree of the second tank, opening the first liquid transfer valve (V3) and the first air inlet valve (V2), the first tank (10) Since the internal pressure of the second tank 20 is lower than the internal pressure of the second tank 20, the liquid can move from the first tank to the second tank due to the pressure difference between the first tank 10 and the second tank 20. Done.

At this time, if the liquid continuously flows from the first tank to the second tank, the first tank becomes higher than the original predetermined vacuum degree, but the first air inlet valve V2 controlled by the control device is predetermined. If it is higher than the vacuum degree, it is opened until the air of the atmosphere enters the inside of the first tank until the predetermined degree of vacuum is maintained so that the first tank maintains the predetermined degree of vacuum at all times.

Here, as shown in FIG. 1, when the first tank is relatively larger than the second tank and the discharge amount of the first tank to the second tank is smaller than the capacity of the first tank, the first air inlet valve ( It goes without saying that atmospheric air does not need to be introduced into the first tank through V2).

Then, when the liquid transfer from the first tank to the second tank is completed, the air of the first tank side with low vacuum degree is moved to the second tank side with high vacuum degree, so that the vacuum degree of the first and second tanks are equal to each other. The following transport preparation status is maintained.

2. When transferring liquid from the second tank to the first tank

First, the control device operates the vacuum pump 30 and opens the first vacuum control valve V1 to increase the degree of vacuum inside the first tank 10. Then, the control device determines that the degree of vacuum inside the first tank 10 reaches a predetermined degree of vacuum and starts the vacuum pump 30 after judging from the signal detected by the first vacuum sensor S1. Stopping and closing the first vacuum control valve (V1) to maintain the vacuum level of the first tank, and when the second liquid transfer valve (V6) and the second air inlet valve (V5) is opened, the second tank (20) Since the internal pressure of the first tank 10 is lower than the internal pressure of the second tank 20, the liquid can move from the second tank to the first tank due to the pressure difference between the second tank 20 and the first tank 10. Done.

At this time, if the liquid is continuously discharged from the second tank to the first tank, the second tank is higher than the original predetermined vacuum degree, but the second air inlet valve V5 controlled by the controller is predetermined. If the degree of vacuum is higher than the predetermined degree, it is opened and air of the atmosphere is introduced into the second tank until the predetermined degree of vacuum is maintained so that the second tank maintains the predetermined degree of vacuum at all times.

Then, when the liquid transfer from the second tank to the first tank is completed, the air of the second tank side with low vacuum degree is moved to the first tank side with high vacuum degree so that the vacuum degree of the first and second tanks are mutually similar. The following transport preparation status is maintained.

According to the device configured as described above, it is possible to transfer all the liquid in the first tank to the second tank when the liquid is transferred to the second tank emptied from the first tank in which the liquid is stored. Rather, only one vacuum pump is required to transfer the liquid from the first tank to the second tank and from the second tank to the first tank, which is inexpensive to install and always internal to the tanks before or after the liquid transfer. This vacuum allows the liquid contained inside the tank to be stably stored in the tank without leakage to the outside, and more efficient for liquid transfer if the tank is large.

Claims (2)

First tank 10; Second tank 20; A vacuum pump 30; One end is connected to the vacuum pump 30 to selectively suck air in the first and second tanks to vacuum the inside of the first and second tanks 10 and 20 to a predetermined pressure ( 40); A first sub vacuum line 41 having one end connected to the main vacuum line 40 and the other end connected to an upper end of the first tank 10 with a first vacuum control valve V1 interposed therebetween; A second sub vacuum line 42 having one end connected to the main vacuum line 40 and the other end connected to an upper end of the second tank 20 with a second vacuum control valve V4 interposed therebetween; One end is connected to the bottom of the first tank 10, the other end is connected to the upper end of the second tank 20, the first liquid transfer valve (V3) is interposed in the middle of the first tank (10) A first transfer pipe (50) for transferring the liquid to the second tank (20); One end is connected to the bottom of the second tank 20, the other end is connected to the upper end of the first tank 10, the second liquid transfer valve (V6) is interposed in the middle of the second tank 20 selectively A second transfer pipe 51 for transferring liquid from the tank to the first tank 10; A first air inlet line 60 connected to an upper end of the first tank 10 and interposing a first air inlet valve V2 on the way to selectively introduce air into the first tank 10. ; A second air inlet line 61 connected to an upper end of the second tank 20 and selectively introducing air into the second tank 20 through a second air inlet valve V5 interposed therebetween. ; A first vacuum sensor S1 for detecting a degree of vacuum inside the first tank 10; A second vacuum sensor S2 for detecting a degree of vacuum inside the second tank 20; And a known control device for selectively opening and closing the various valves and the vacuum pump 30 based on values detected by the first and second vacuum sensors S1 and S2. A device that allows pumps to exchange liquids between tanks. The apparatus of claim 1, wherein the control device comprises various valves and sensors, an interface connected to the vacuum pump, an input unit for inputting various kinds of information and predetermined set values, an output unit displaying various kinds of information and predetermined set values, and the interface. A control unit which transmits various information and a predetermined set value to the input unit and the output unit, and controls the opening and closing of various valves and the operation of the vacuum pump according to the received information. Devices that allow you to send and receive each other.