CN105691970B - A kind of sealing fluid reservoir of flexible inner bag compensation device - Google Patents

Abstract

The invention relates to a sealed liquid storage tank with an elastic liner compensating device, comprising a sealed liquid storage tank, the top of the sealed liquid storage tank is provided with a liquid inlet and a liquid inlet solenoid valve; the bottom of the sealed liquid storage tank is provided with an outlet Liquid port and liquid outlet solenoid valve; the inside of the sealed liquid storage tank is provided with an elastic liner, and the top of the sealed liquid storage tank is also provided with a vent pipe, an air flow balance pipe and an electric contact pressure gauge. The breathing port of the flexible liner is connected to the air tank, and the tail end of the air balance tube is connected to the air compressor through a three-way straight solenoid valve, and a three-way bypass solenoid valve is also provided; the sealed liquid storage tank is also provided with an electric contact liquid level gauge, It also includes a control module to automatically control each electromagnetic valve; the invention also relates to a method for using a sealed liquid storage tank with an elastic liner compensation device. The invention keeps the liquid in the sealed liquid storage tank isolated from the outside atmosphere, prevents it from being damp, oxidized and polluted, and ensures that the liquid can be stored safely, long-term and reliably.

Description

A sealed liquid storage tank with an elastic liner compensating device

technical field

The invention relates to a sealed liquid storage tank with an elastic liner compensating device and a usage method thereof.

Background technique

When some liquids are in contact with air, moisture or other impurities, they are prone to oxidation reactions and other chemical reactions, or they will deteriorate and deteriorate due to moisture and gas dissolved in the liquids, so they cannot be used. These sensitive liquids need to be stored in airtight containers and stored in airtight containers. The intrusion of oxygen, moisture or other impurities can be avoided during the work of entering and exiting the liquid, but some of the dynamic sealing methods of the traditional liquid storage container adopt nitrogen balance sealing, or adopt vacuum sealing and other methods to achieve, and use nitrogen balance dynamic sealing. The method is not suitable for some liquids that are harmful to nitrogen, especially for ultra-high voltage and ultra-high voltage transformer oils used in the power industry, which have strict requirements on the gas content in the oil, and nitrogen is easily soluble in power oil. Thereby can not be used; And the method for vacuum sealing, its manufacturing, use and maintenance, overhaul cost are high, and difficult to operate, especially when the negative pressure system seal is damaged, the container is very easy to inhale outside air, moisture and damage stored in the container. liquid.

Contents of the invention

In view of this, the object of the present invention is to provide a sealed liquid storage tank with an elastic liner compensation device and its use method, which can keep the liquid in the sealed liquid storage tank isolated from the outside atmosphere, and prevent it from being damp, oxidized, and polluted , to ensure the safe, long-term and reliable storage of liquids.

In order to achieve the above object, the present invention adopts the following technical scheme: a sealed liquid storage tank with an elastic liner compensation device, comprising a sealed liquid storage tank, characterized in that: the top of the sealed liquid storage tank is provided with a liquid inlet, The liquid inlet is provided with a liquid inlet solenoid valve; the bottom of the sealed liquid storage tank is provided with a liquid outlet, and the liquid outlet is provided with a liquid outlet solenoid valve; the inside of the sealed liquid storage tank is provided with an elastic liner, and the top of the sealed liquid storage tank is also provided with a There are vent pipes, air flow balance pipes and electric contact pressure gauges used to detect the internal air pressure of the sealed liquid storage tank. There is a vent valve on the vent pipe, and the head end of the air balance pipe is connected to the breathing port of the elastic liner. , the tail end of the airflow balance pipe is connected to the air compressor through a three-way straight pipe solenoid valve, and a three-way bypass solenoid valve is also set on the airflow balance pipe, the three-way bypass solenoid valve is connected to the atmosphere and connected to the three-way straight pipe solenoid valve Interlocking each other; the side of the sealed liquid storage tank is also equipped with an electric contact level gauge; it also includes a control module, which is connected with the electric contact pressure gauge, electric contact level gauge, liquid inlet solenoid valve, and liquid outlet solenoid valve respectively. , Three-way straight pipe solenoid valve, three-way bypass solenoid valve and air compressor electromechanical connection.

Further, a safety valve is provided on the top of the sealed liquid storage tank, and the safety valve is electrically connected to the control module.

Further, it also includes a vacuum tube, one end of the vacuum tube is connected to the vent valve, and the other end of the vacuum tube is connected to the vacuum pump.

Further, a lanyard is installed on the outer wall of the elastic liner, and the elastic liner is tied to a hook provided on the upper inner wall of the sealed liquid storage tank through the lanyard.

Further, the control module is a PLC controller or a microcomputer processor.

A method for using a sealed liquid storage tank with an elastic liner compensation device, characterized in that it includes the following three states and specific steps:

A. Static sealed storage liquid state:

Step A1: Open the three-way bypass solenoid valve and close the three-way straight pipe solenoid valve;

Step A2: The elastic liner communicates with the outside atmosphere through the airflow balance tube and the three-way bypass solenoid valve to perform respiration and keep the internal air pressure of the sealed liquid storage tank consistent with the outside air pressure;

B. Liquid entry state:

Step B1: Open the three-way bypass solenoid valve and the vent valve, and close the three-way straight pipe solenoid valve;

Step B2: open the liquid inlet solenoid valve, and inject liquid into the sealed liquid storage tank;

Step B3: As the liquid level in the sealed liquid storage tank continues to rise, the gas above the liquid level in the sealed liquid storage tank is discharged through the vent valve. At the same time, the liquid squeezes the elastic inner tank, and the exhaled gas from the elastic inner tank passes through the air flow balance tube, The three-way bypass solenoid valve is discharged to the atmosphere;

Step B4: When the electric contact liquid level gauge detects that the liquid level rises to a preset high liquid level setting value, the control module controls the liquid inlet solenoid valve to close;

Step B5: Connect the vacuum tube to the vent valve, and turn on the vacuum pump to vacuum the gas above the liquid level in the sealed liquid storage tank;

Step B6: When the electric contact pressure gauge detects that the air pressure in the sealed liquid storage tank reaches a preset air pressure setting value, first close the vent valve, and then close the vacuum pump;

Step B7: Remove the vacuum pump and vacuum tube, and the liquid inlet operation is completed;

C. Liquid state:

Step C1: Open the liquid outlet solenoid valve, the three-way straight pipe solenoid valve and the air compressor, and close the three-way bypass solenoid valve;

Step C2: As the liquid level in the sealed liquid storage tank continues to drop, the air compressor continuously presses gas into the inner cavity of the elastic liner to expand the volume of the elastic liner to compensate for the drop in the liquid level in the sealed liquid storage tank. space;

Step C3: When the electric contact liquid level gauge detects that the liquid level drops to a preset low liquid level setting value, the control module controls the liquid outlet solenoid valve, the three-way straight pipe solenoid valve and the air compressor to close;

Step C4: Open the three-way bypass solenoid valve to keep the internal air pressure of the sealed liquid storage tank consistent with the external air pressure, and the liquid discharge operation is completed.

Compared with the prior art, the present invention has the following beneficial effects: the present invention relies on the elastic liner installed in the device container to compensate for the balance by expanding or contracting the volume of the elastic liner through the switching action of the air flow balance tube and the air compressor. The change of the volume and pressure of the space above the liquid level in the container, so no matter whether the liquid stored in the liquid storage container is in static storage or in the whole process of liquid inlet and outlet operation, the liquid in the liquid storage container can be guaranteed to be stable. Intruded by external oxygen, moisture and other impurities, it prevents the liquid in the container from being oxidized, damp, polluted, etc., and ensures that the stored liquid can be stored in a safe, long-term, reliable quality and quantity. Compared with traditional sealed storage devices, it has great advantages in saving energy consumption, reducing working intensity and working time, and greatly reducing environmental pollution caused by leakage.

Description of drawings

Fig. 1 is a schematic diagram of the static sealing storage liquid state of the present invention.

Fig. 2 is a schematic diagram of the liquid inlet state of the present invention.

Fig. 3 is a schematic diagram of the liquid outlet state of the present invention.

Fig. 4 is a schematic diagram of the vacuum state of the present invention.

In the figure: 1-sealed liquid storage tank, 2-elastic inner tank, 3-liquid outlet, 4-liquid outlet solenoid valve, 5-hook, 6-elastic inner tank breathing port, 7-safety valve, 8-liquid inlet Port, 9-liquid inlet solenoid valve, 10-air flow balance pipe, 11-three-way straight pipe solenoid valve, 12-three-way bypass solenoid valve, 13-air compressor, 14-liquid, 15-electric contact level gauge , 16-venting tube, 17-venting valve, 18-vacuumizing tube, 19-vacuum pump.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Please refer to Fig. 1, the present embodiment provides a sealed liquid storage tank with an elastic liner compensating device, including a sealed liquid storage tank 1, which is characterized in that: the top of the sealed liquid storage tank 1 is provided with a liquid inlet 8, into which The liquid inlet 8 is provided with a liquid inlet solenoid valve 9; the bottom of the sealed liquid storage tank 1 is provided with a liquid outlet 3, and the liquid outlet 3 is provided with a liquid outlet solenoid valve 4; the inside of the sealed liquid storage tank 1 is provided with an elastic liner 2. The top of the sealed liquid storage tank 1 is also provided with a vent pipe 16, an air flow balance pipe 10 and an electric contact pressure gauge (not shown in the figure) for detecting the internal air pressure of the sealed liquid storage tank 1. On the vent pipe 16 A vent valve 17 is provided, and the head end of the airflow balance pipe 10 is connected to the elastic liner breathing port 6 of the elastic liner 2. In particular, the airflow balance pipe 10 is fixed on the sealed liquid storage tank 1 through a flange, and the airflow balance pipe 10 It communicates with the elastic liner 2 to ensure that the sealed liquid storage tank 1 is isolated from the outside atmosphere; the tail end of the air flow balance pipe 10 is connected to the air compressor 13 through a three-way straight pipe solenoid valve 11, and the air flow balance pipe 10 is also provided with a three-way Bypass solenoid valve 12, the three-way bypass solenoid valve 12 is connected to the atmosphere and is mutually locked with the three-way straight pipe solenoid valve 11; the side of the sealed liquid storage tank 1 is also provided with an electric contact liquid level gauge 15; it also includes a control Module (not shown in the figure), the control module is connected with the electric contact pressure gauge, the electric contact liquid level gauge 15, the liquid inlet solenoid valve 9, the liquid outlet solenoid valve 4, the three-way straight pipe solenoid valve 11, and the three-way bypass The solenoid valve 12 and the air compressor 13 are electrically connected.

In this embodiment, a safety valve 7 is provided on the top of the sealed liquid storage tank 1, and the safety valve 7 is electrically connected to the control module. When the electric contact pressure gauge detects that the air pressure in the sealed liquid storage tank 1 exceeds the preset safety When the pressure is set, the control module controls the safety valve 7 to open to release pressure until the air pressure drops below the set value of the safety pressure, and the safety valve 7 is closed to ensure the safe operation of the sealed liquid storage tank 1 .

Please refer to Fig. 4, in the present embodiment, also comprise vacuum tube 18, one end of vacuum tube 18 is connected with vent valve 17, and the other end of vacuum tube 18 is connected with vacuum pump 19, and vacuum tube 18 and vent valve 17 are when not in use Can be disassembled.

Please continue to refer to Fig. 1, in the present embodiment, the outer wall of the elastic liner 2 is equipped with a lanyard, the elastic liner 2 is bound on the hook 5 provided on the upper inner wall of the sealed liquid storage tank 1 through the lanyard, and the elastic liner 2 is formed by High-quality oil-resistant elastic rubber, or other high-quality polymer materials suitable for storing liquid media with good elasticity, good toughness, and high strength.

In this embodiment, the control module is a PLC controller or a microcomputer processor, which automatically controls each device connected to it according to a preset programmed program. For specific control, please refer to the usage method section.

The present invention also provides a method for using a sealed liquid storage tank with an elastic liner compensation device, which is characterized in that it includes the following three states and specific steps:

A. Static sealed storage liquid state, please refer to Figure 1:

Step A1: open the three-way bypass solenoid valve 12, and close the three-way straight pipe solenoid valve 11;

Step A2: The elastic liner 2 communicates with the outside atmosphere through the airflow balance tube 10 and the three-way bypass solenoid valve 12 to carry out respiration, and keep the internal air pressure of the sealed liquid storage tank 1 consistent with the outside air pressure;

B. For the state of liquid entry, please refer to Figure 2:

Step B1: Open the three-way bypass solenoid valve 12 and the vent valve 17, and close the three-way straight pipe solenoid valve 11;

Step B2: open the liquid inlet solenoid valve 9, and inject liquid 14 into the sealed liquid storage tank 1;

Step B3: As the liquid level in the sealed liquid storage tank 1 continues to rise, the gas above the liquid level in the sealed liquid storage tank 1 is discharged through the vent valve 17, and at the same time, the liquid 14 squeezes the elastic liner 2, and the gas exhaled from the elastic liner 2 The gas is discharged into the atmosphere through the air flow balance pipe 10 and the three-way bypass solenoid valve 12;

Step B4: When the electric contact liquid level gauge 15 monitors that the liquid level rises to a preset high liquid level setting value, the control module controls the liquid inlet solenoid valve 9 to close;

Step B5: Please refer to Figure 4, connect the vacuum tube 18 to the vent valve 17, and turn on the vacuum pump 19 to vacuum the gas above the liquid surface in the sealed liquid storage tank 1;

Step B6: When the electric contact pressure gauge detects that the air pressure in the sealed liquid storage tank 1 reaches a preset air pressure setting value, first close the vent valve 17, and then close the vacuum pump 19;

Step B7: remove the vacuum pump 19 and the vacuum tube 18, and the liquid inlet operation is completed;

C. For the state of liquid discharge, please refer to Figure 3:

Step C1: Open the liquid outlet solenoid valve 4, the three-way straight pipe solenoid valve 11 and the air compressor 13, and close the three-way bypass solenoid valve 12;

Step C2: As the liquid level in the sealed liquid storage tank 1 continues to drop, the air compressor 13 continuously presses gas into the inner cavity of the elastic liner 2, so that the volume of the elastic liner 2 expands to compensate for the liquid in the sealed liquid storage tank 1 The space vacated by the face down;

Step C3: When the electric contact liquid level gauge 15 detects that the liquid level drops to a preset low liquid level setting value, the control module controls the liquid outlet solenoid valve 4, the three-way straight pipe solenoid valve 11 and the air compressor 13 to close;

Step C4: Open the three-way bypass solenoid valve 12 to keep the internal air pressure of the sealed liquid storage tank 1 consistent with the external air pressure, and the liquid discharge operation is completed.

The above are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the patent scope of the present invention shall fall within the scope of the present invention.

Claims (4)

1. A sealed liquid storage tank with an elastic liner compensation device, comprising a sealed liquid storage tank, characterized in that: the top of the sealed liquid storage tank is provided with a liquid inlet, and the liquid inlet is provided with a liquid inlet solenoid valve; The bottom of the liquid storage tank is provided with a liquid outlet, and the liquid outlet is provided with a liquid outlet solenoid valve; the inside of the sealed liquid storage tank is provided with an elastic liner, and the top of the sealed liquid storage tank is also provided with a vent pipe, an air flow balance pipe and a The electric contact pressure gauge is used to detect the internal air pressure of the sealed liquid storage tank. There is a vent valve on the vent pipe. The straight pipe solenoid valve is connected with the air compressor, and there is also a three-way bypass solenoid valve on the air balance pipe. The three-way bypass solenoid valve is connected to the atmosphere and is interlocked with the three-way straight pipe solenoid valve; There is also an electric contact level gauge on the side; it also includes a control module, which is connected with the electric contact pressure gauge, the electric contact liquid level gauge, the liquid inlet solenoid valve, the liquid outlet solenoid valve, the three-way straight pipe solenoid valve, and the three-way bypass Electromechanical connection between solenoid valve and air compressor; it also includes a vacuum tube, one end of the vacuum tube is connected to the vent valve, and the other end of the vacuum tube is connected to the vacuum pump; it includes the following three states and specific steps: A. Static sealed storage liquid state: Step A1: Open the three-way bypass solenoid valve and close the three-way straight pipe solenoid valve; Step A2: The elastic liner communicates with the outside atmosphere through the airflow balance tube and the three-way bypass solenoid valve to perform respiration and keep the internal air pressure of the sealed liquid storage tank consistent with the outside air pressure; B. Liquid entry state: Step B1: Open the three-way bypass solenoid valve and the vent valve, and close the three-way straight pipe solenoid valve; Step B2: open the liquid inlet solenoid valve, and inject liquid into the sealed liquid storage tank; Step B3: As the liquid level in the sealed liquid storage tank continues to rise, the gas above the liquid level in the sealed liquid storage tank is discharged through the vent valve. At the same time, the liquid squeezes the elastic inner tank, and the exhaled gas from the elastic inner tank passes through the air flow balance tube, The three-way bypass solenoid valve is discharged to the atmosphere; Step B4: When the electric contact liquid level gauge detects that the liquid level rises to a preset high liquid level setting value, the control module controls the liquid inlet solenoid valve to close; Step B5: Connect the vacuum tube to the vent valve, and turn on the vacuum pump to vacuum the gas above the liquid level in the sealed liquid storage tank; Step B6: When the electric contact pressure gauge detects that the air pressure in the sealed liquid storage tank reaches a preset air pressure setting value, first close the vent valve, and then close the vacuum pump; Step B7: Remove the vacuum pump and vacuum tube, and the liquid inlet operation is completed; C. Liquid state: Step C1: Open the liquid outlet solenoid valve, the three-way straight pipe solenoid valve and the air compressor, and close the three-way bypass solenoid valve; Step C2: As the liquid level in the sealed liquid storage tank continues to drop, the air compressor continuously presses gas into the inner cavity of the elastic liner to expand the volume of the elastic liner to compensate for the drop in the liquid level in the sealed liquid storage tank. space; Step C3: When the electric contact liquid level gauge detects that the liquid level drops to a preset low liquid level setting value, the control module controls the liquid outlet solenoid valve, the three-way straight pipe solenoid valve and the air compressor to close; Step C4: Open the three-way bypass solenoid valve to keep the internal air pressure of the sealed liquid storage tank consistent with the external air pressure, and the liquid discharge operation is completed. 2. The sealed liquid storage tank with an elastic liner compensating device according to claim 1, wherein a safety valve is provided on the top of the sealed liquid storage tank, and the safety valve is electrically connected to the control module. 3. The sealed liquid storage tank with elastic liner compensating device according to claim 1, characterized in that: the outer wall of the elastic liner is equipped with a lanyard, and the elastic liner is tied to the hook set on the upper inner wall of the sealed liquid storage tank by the lanyard superior. 4. The sealed liquid storage tank with elastic liner compensation device according to claim 1, characterized in that: the control module is a PLC controller or a microcomputer processor.