WO2019041422A1

WO2019041422A1 - Air pressure type liquid discharging device

Info

Publication number: WO2019041422A1
Application number: PCT/CN2017/104158
Authority: WO
Inventors: 张将; 张尚峰; 石欣超; 张世著
Original assignee: 鼎纳科技有限公司
Priority date: 2017-08-29
Filing date: 2017-09-29
Publication date: 2019-03-07
Also published as: CN107555389A; CN107555389B

Abstract

Disclosed is an air pressure type liquid discharging device, comprising a sealed tank (1), a liquid inlet pipeline (2), an air inlet pipeline (3), a liquid discharging pipeline (4), and an air exhaust pipeline (5), wherein the liquid inlet pipeline (2), the air inlet pipeline (3), the liquid discharging pipeline (4), and the air exhaust pipeline (5) are all in communication with the interior of the sealed tank (1) in such a way as to penetrate the internal and external environment of the sealed tank (1). The device also comprises a liquid return air path (6), with one end of the liquid return air path (6) being connected to the air inlet pipeline (3), and the other end of the liquid return gas path (6) being connected to the liquid discharging pipeline (4). The device can conveniently recover the residual liquid in the liquid discharging pipeline (4) and avoid a large amount of volatile gas from escaping because of the large air pressure gap between two ends of the liquid discharging pipeline (4).

Description

Air pressure discharge device

Technical field

The invention relates to the technical field of a pneumatic liquid discharge device, and more particularly to a pneumatic liquid discharge device for a volatile liquid sealed in a can.

Background technique

The existing pneumatic liquid discharge device generally adopts a structural design in which the liquid outlet is directly connected to the outside atmosphere. If it is applied to a volatile liquid, it will escape from the vaporization of the liquid from the high pressure sealed can to the low pressure outlet. The loss and waste of the liquid are caused; and after the liquid discharge is completed, the residual liquid in the pipeline, especially the liquid outlet, is not recovered or cleaned, resulting in waste of the liquid. In addition, the liquid accumulated in the liquid outlet may precipitate, crystallize or condense due to evaporation or absorption of moisture, thereby blocking the liquid outlet, so that the maintenance frequency of the device is too high and the production efficiency is low; if the liquid is corrosive, It will cause damage to the inner wall of the drain line and shorten the service life, and eventually the pneumatic drain device will not work properly.

Summary of the invention

In view of the above problems, an object of the present invention is to provide a pneumatic liquid discharge device which solves the problem that the volatile liquid of the prior art is easily volatilized and the liquid discharge port is easily blocked and corroded.

In order to achieve the above object, the present invention is achieved by the following technical solutions:

An air discharge device includes a sealed tank, an inlet line, an intake line, a drain line, and an exhaust line, the inlet line, the intake line, the drain line, and The exhaust pipe is connected to the inside of the sealed tank through the internal and external environment of the sealed can, and is characterized in that it further comprises a liquid returning gas path, and one end of the liquid returning gas path is connected with the intake pipe, and is returned. The other end of the liquid gas path is connected to the drain line.

Preferably, one end of the liquid returning gas path is connected to the intake pipe through a tee.

Preferably, the other end of the liquid returning gas path is connected to the liquid outlet of the liquid discharge line.

Preferably, the liquid returning gas path is provided with a one-way valve near the liquid outlet, and the one-way valve is opened The port is arranged towards the drain line.

Preferably, in the liquid inlet line, the exhaust line, the inlet line is located between the end of the liquid returning gas path and the outer wall of the sealed can, the liquid returning gas path is close to three The through portion and the drain line are respectively provided with a first two-way valve, a gas valve, a second two-way valve, a third two-way valve, and a fourth two-way valve.

Preferably, the method further comprises a control device, the control device comprising:

a control module electrically connected to the first two-way valve, the gas valve, the second two-way valve, the third two-way valve, and the fourth two-way valve for controlling a switch of the valve;

a first air pressure sensing device electrically connected to the control module, the first air pressure sensing device being disposed at a portion of the intake line between one end of the liquid returning gas path and the second two-way valve, the display for displaying the air pressure data Located outside the intake line, the sensing end is located in the intake line, and the first air pressure sensing device is configured to sense the real-time air pressure in the intake line and transmit the signal to the control module;

a second air pressure sensing device electrically connected to the control module, the second air pressure sensing device being disposed at the top of the sealed can and penetrating the sealed can, the display for displaying the air pressure data is located outside the sealed can, and the sensing end is located in the sealed can, The second air pressure sensing device is configured to sense a real-time air pressure in the sealed can and transmit a signal to the control module; and

a liquid level sensing device electrically connected to the control module, the liquid level sensing device being disposed in the sealed tank for sensing a real-time liquid level in the sealed can and transmitting a signal to the control module.

Preferably, the drain line and the liquid return line are extended by a flexible tube on a side close to the liquid outlet.

Compared with the prior art, the present invention has at least the following beneficial effects: in the liquid discharging process, when the air pressure in the intake line changes excessively or the air pressure is too large, the control module simultaneously closes the second on the intake line. The two-way valve and the fourth two-way valve on the exhaust line avoid the large amount of volatile gas from escaping due to the excessive pressure difference between the two ends of the drain line, reducing the waste of liquid; When the residual liquid in the road, the control module first closes the second two-way valve on the intake line, then opens the third two-way valve on the return liquid line, and keeps the fourth two-way valve on the drain line open, which is After the liquid discharge is finished, the gas in the intake pipe can enter the drain pipe through the liquid return pipe, so that the residual liquid in the drain pipe can be returned to the sealed tank by the intake air, thereby preventing the gas from being discharged into the sealed tank. The residual liquid solidifies to block the drain line.

In order to achieve the above and related ends, one or more aspects of the present invention include the features particularly pointed out hereinafter. The following description and the annexed drawings set forth in detail However, these aspects are indicative of only some of the various ways in which the principles of the invention may be employed. Furthermore, the invention is intended to cover all such aspects and their equivalents.

DRAWINGS

Other objects and results of the present invention will become more apparent and appreciated from the description of the appended claims. In the drawing:

Figure 1 is a schematic structural view of an embodiment of the present invention;

2 is a schematic structural view of another embodiment of the present invention.

Detailed ways

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

Referring to Fig. 1, a pneumatic liquid discharging device provided by the present invention comprises a sealed tank 1, an inlet line 2, an intake line 3, a drain line 4, an exhaust line 5 and a return liquid path 6. A seal 7 is attached to the top of the sealed can 1, and the inlet pipe 2, the intake pipe 3, the drain line 4, and the exhaust line 5 communicate with the inside 1 of the sealed can by passing through the gasket 7. In addition, the top of the sealed can 1 is integrally formed with the tube body of the sealed can 1 to form a closed space, and the inlet pipe 2, the intake pipe 3, the drain line 4, and the exhaust line 5 pass through the top of the sealed can 1 The mode is in communication with the interior 1 of the sealed can 1 . One end of the liquid returning gas path 6 is connected to the intake pipe 3 . Specifically, one end of the liquid returning gas path 6 communicates with the intake pipe 3 through the tee 8 ; the other end of the returning liquid path 6 and the draining pipe 4 Connected, it is preferable that the other end of the liquid returning gas path 6 communicates with the liquid outlet 40 on the liquid discharge line 4, in order to prevent the liquid in the liquid discharge line 4 from flowing back into the liquid returning gas path 6, in the liquid returning A check valve 13 is disposed near the liquid outlet 40, and the opening of the check valve 13 is disposed toward the liquid outlet 40. In addition, in order to facilitate timely control of the device, the portion of the liquid inlet pipe 2, the exhaust pipe 5, the intake pipe 3 between the tee 8 and the gasket 7, and the portion of the liquid returning gas path 6 close to the tee 8 are provided. And the drain line 4 is provided with a first two-way valve 9, a gas valve 10, a second two-way valve 11, a third two-way valve 12, and a fourth two-way valve 14, respectively. Referring to FIG. 2, in order to facilitate the normal use of the air discharge device in various environments, it is also possible to extend the flexible hose 19 on the side of the drain line 4 and the liquid return line 6 close to the liquid outlet 40. .

The pneumatic liquid discharge device of the present invention further includes a control device. The control device includes a control module 15, The first air pressure sensing device 16, the second air pressure sensing device 17, and the liquid level sensing device 18. The control module 15 is electrically coupled to the first two-way valve 9, the gas valve 10, the second two-way valve 11, the third two-way valve 12, and the fourth two-way valve 14 for controlling the switching of the valves.

The first air pressure sensing device 16 is electrically connected to the control module 15, and the first air pressure sensing device 16 is mounted on a portion of the intake line 3 between the three-way 8 and the second two-way valve 11, and the display for displaying the air pressure data is located at the intake pipe. Outside the road 3, the sensing end is located in the intake line 3, and the first air pressure sensing device 16 is for sensing the real-time air pressure in the intake line 3 and transmitting the signal to the control module 15. The second air pressure sensing device 17 is also electrically connected to the control module 15, and the second air pressure sensing device 17 is mounted on the top of the sealed can 1 and penetrates the sealed can 1. The display for displaying the air pressure data is located outside the sealed can 1 and the sensing end is sealed. In the tank 1, a second air pressure sensing device 17 is used to sense the real-time air pressure in the sealed tank 1 and transmit the signal to the control module 15. The liquid level sensor 18 is installed on a portion of the liquid inlet pipe 2 located in the sealed tank 1 for sensing the real-time liquid level in the sealed tank 1 and transmitting the signal to the control module 15, and the control module 15 is based on the liquid level transmitted in real time. The signals control the switches of the first two-way valve 9, the gas valve 10, the second two-way valve 11, the third two-way valve 12, and the fourth two-way valve 14.

When the sealed tank 1 is filled, the control module 15 first rotates the second two-way valve 11 of the intake line 3 to the closed position, and rotates the third two-way valve 12 of the returning liquid path 6 to the closed position, and then exhausts The gas valve 10 of the line 5 is rotated to the open position, and it is confirmed that the fourth two-way valve 14 of the drain line 4 is rotated to the closed position, and then the first two-way valve 9 of the inlet line 2 is rotated to the open position. Liquid is injected into the sealed tank 1 in the liquid line 2. When the data transmitted to the control module 15 by the level sensing device 18 indicates that the liquid level in the sealed can 1 has reached a controlled height, the control module 15 rotates the first two-way valve 9 on the inlet line 2 to the closed position, and Both the gas valve 10 of the exhaust line 5 and the fourth two-way valve 14 of the drain line 4 are rotated to the closed position, and the liquid in the sealed tank 1 is stopped.

When the sealed tank 1 is drained, the control module 15 first rotates the second two-way valve 11 of the intake line 3 to the open position, and rotates the fourth two-way valve 14 of the drain line 4 to the open position, and the sealed tank 1 The liquid is discharged in the middle. During the draining process, the data transmitted to the control module 15 by the first air pressure sensing device 16 indicates that the peak value of the fluctuation of the air pressure value in the intake line 3 is higher than the upper limit value or the bottom value is lower than the lower limit value, or the fluctuation of the air pressure value When the rate is higher than the threshold, the control module 15 first rotates the second two-way valve 11 of the intake line 3 to the closed position, and then rotates the fourth two-way valve 14 of the drain line 4 to the closed position to stop the draining. The third two-way valve 12 of the return fluid path 6 is then rotated to the open position. If the data transmitted by the second air pressure sensing device 17 to the control module 15 indicates that the warning value of the air pressure is exceeded, the control mode The block 15 also rotates the gas valve 10 of the exhaust line 5 to the open position to vent the sealed can 1 and the data to be transmitted by the first pneumatic sensing device 16 to the control module 15 indicates the value of the air pressure in the intake line 3. After the data transmitted to the control module 15 by the second air pressure sensing device 17 is lower than the warning value, the control module 15 first confirms that the air valve 10 of the exhaust line 5 has been rotated to the closed position, and at the same time, the intake line 3 is The second two-way valve 11 is rotated to the open position, the fourth two-way valve 14 of the drain line 4 is rotated to the open position, and the third two-way valve 12 of the return liquid passage 6 is rotated to the closed position to continue the draining .

After the draining of the sealed can 1 is completed, the control module 15 does not receive a new operation command within a certain period of time, that is, it first confirms that the fourth two-way valve 14 of the draining line 4 has been rotated to the open position, and then automatically takes the intake pipe. The second two-way valve 11 of the road 3 is rotated to the closed position, and the third two-way valve 12 of the liquid returning gas path 6 is rotated to the open position, and the residual liquid in the inner wall of the drain line 4 and the liquid outlet 40 is returned to Sealed in tank 1. When the difference between the air pressure data transmitted by the first air pressure sensing device 16 to the control module 15 and the air pressure data transmitted by the second air pressure sensing device 17 to the control module 15 is less than a predetermined value, the control module 12 will also discharge the exhaust pipe. The gas valve 10 of the road 5 is rotated to the open position to accelerate the process of returning liquid.

After the liquid return of the sealed tank 1 is completed, the control module 15 does not receive a new operation command within a certain period of time, that is, the third two-way valve 12 of the liquid returning gas path 6 is automatically rotated to the closed position, and the exhaust line is confirmed. The gas valve 10 of 5 has been rotated to the closed position, and then the second two-way valve 11 of the intake line 3 is rotated to the open position, and the first two-way valve 9 of the inlet line 2 is rotated to the open position to pass the liquid through the liquid. The line 2 is discharged to the liquid source for recycling.

The pneumatic draining device according to the present invention is described by way of example with reference to the accompanying drawings. However, it will be understood by those skilled in the art that various improvements can be made to the above-described pneumatic liquid discharge device of the present invention without departing from the scope of the present invention. Therefore, the scope of the invention should be determined by the content of the appended claims.

Claims

An air discharge device includes a sealed tank, an inlet line, an intake line, a drain line, and an exhaust line, the inlet line, the intake line, the drain line, and The exhaust pipe is connected to the inside of the sealed tank through the internal and external environment of the sealed can, and is characterized in that it further comprises a liquid returning gas path, and one end of the liquid returning gas path is connected with the intake pipe, and is returned. The other end of the liquid gas path is connected to the drain line.
The pneumatic liquid discharge device according to claim 1, wherein one end of the liquid returning gas path is connected to the intake pipe through a tee.
The pneumatic liquid discharge device according to claim 1, wherein the other end of the liquid returning gas path is connected to a liquid discharge port of the liquid discharge line.
The pneumatic liquid discharging device according to claim 1, wherein the liquid returning gas path is provided with a one-way valve near the liquid outlet, and the opening of the one-way valve is disposed toward the liquid discharging pipe .
The pneumatic liquid discharge device according to claim 1, wherein said liquid inlet pipe, said exhaust pipe, and said intake pipe are located at one end of said liquid returning gas path and said outer wall of said sealed canister The first portion, the liquid returning gas path, and the liquid discharge line are respectively provided with a first two-way valve, a gas valve, a second two-way valve, a third two-way valve, and a fourth two-way valve.
A pneumatic draining device according to claim 5, further comprising control means, said control means comprising:

a control module electrically connected to the first two-way valve, the gas valve, the second two-way valve, the third two-way valve, and the fourth two-way valve for controlling a switch of the valve;

a first air pressure sensing device electrically connected to the control module, the first air pressure sensing device being disposed on a portion of the intake line between one end of the liquid returning gas path and the second two-way valve, displaying the air pressure data The display is located outside the intake line, and the sensing end is located in the intake line, the first air pressure sensing device is configured to sense the real-time air pressure in the intake line and transmit the signal to the control module;

a second air pressure sensing device electrically connected to the control module, the second air pressure sensing device being disposed at the top of the sealed can and passing through the sealed can, the display for displaying the air pressure data is located outside the sealed can, and the sensing end is located in the sealed can The second air pressure sensing device is configured to sense a real-time air pressure in the sealed can and transmit a signal to the control module;

a liquid level sensing device electrically connected to the control module, the liquid level sensing device being disposed in the sealed tank for sensing a real-time liquid level in the sealed can and transmitting a signal to the control module.
The pneumatic liquid discharge device according to claim 3, wherein the liquid discharge line and the liquid return line are extended by a flexible tube on a side close to the liquid outlet.