Fluid caching equipment and fluid control method

Abstract

The invention provides fluid caching equipment and a fluid control method. The fluid caching equipment comprises a storage tank; the liquid inlet pipe is communicated with the storage tank and is used for conveying liquid into the storage tank; the first flow controller is arranged on the liquid inlet pipe and used for controlling the liquid conveying flow in the liquid inlet pipe. The first flow meter is connected with the liquid inlet pipe, located between the first flow controller and the storage tank and used for detecting the flow in the liquid inlet pipe. The liquid outlet pipe is communicated with the storage tank and is used for discharging liquid in the storage tank; the second flowmeter is connected with the liquid outlet pipe and used for detecting the flow in the liquid outlet pipe. According to the fluid temporary storage equipment, the flow of the liquid inlet pipe and the flow of the liquid outlet pipe can be detected in time, the flow of liquid in the liquid inlet pipe can be rapidly adjusted through the first flow controller, so that the flow of the liquid inlet pipe is equal to that of the liquid outlet pipe, and it is guaranteed that inlet and outlet liquid in the storage tank keeps balanced; and the situation that the liquid level in the storage tank is too high or too low, so that the equipment is shut down is avoided, and the production efficiency is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control equipment, and in particular to a fluid buffering device and a fluid control method. Background Art

[0002] In a fluid system, in order to maintain a balance between water inlet and water outlet, a storage tank is usually required for buffering. When there is a lot of water inlet, the excess water can be stored in the storage tank. When there is a lot of water outflow, the excess water in the storage tank can be discharged for additional replenishment, so that the water inlet and outlet of the entire liquid system are balanced.

[0003] However, this technology has very high requirements on the size of the storage tank and the system control algorithm. The larger the flow rate, the larger the volume of the storage tank is required, which will lead to a larger volume of the whole machine. In addition, since the system control requires a certain response time, the system often loses control or the feedback is not timely. For example, low or high liquid level alarms cause the equipment to shut down, especially when the flow rate needs to be changed quickly at the outlet due to actual conditions. The system will not respond in time, causing the liquid level in the storage tank to be too high or too low, causing the equipment to shut down, affecting production efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a fluid buffering device and a fluid control method, which can timely control the liquid inlet flow rate so that the inlet and outlet liquids can maintain a balance, avoid the liquid level in the storage tank being too high or too low causing the equipment to shut down, and ensure production efficiency.

[0005] To achieve the above-mentioned object, in a first aspect, the present invention provides a fluid caching device, comprising a storage tank; A liquid inlet pipe, connected to the storage tank, and used to transport the liquid into the storage tank; A first flow controller, disposed in the liquid inlet pipe, for controlling the liquid delivery flow in the liquid inlet pipe; a first flow meter connected to the liquid inlet pipe and located between the first flow controller and the storage tank, and used for detecting the flow in the liquid inlet pipe; A liquid outlet pipe, connected to the storage tank, and used to discharge the liquid in the storage tank; a second flow meter, connected to the liquid outlet pipe, for detecting the flow rate in the liquid outlet pipe; The second flow controller is arranged in the liquid outlet pipe and is used for controlling the liquid delivery flow in the liquid outlet pipe. The beneficial effect of the fluid cache device provided by the present invention is that by arranging a first flow meter and a first flow controller on the liquid inlet pipe to control and detect the liquid flow in the liquid inlet pipe, and arranging a second flow meter on the liquid outlet pipe to detect the flow in the liquid outlet pipe, the flow of the liquid inlet pipe and the liquid outlet pipe can be detected in time, and the liquid flow in the liquid inlet pipe can be quickly adjusted by the first flow controller to make the flow of the liquid inlet pipe and the liquid outlet pipe equal, thereby ensuring that the liquid in and out of the storage tank remains balanced, avoiding the situation where the liquid level in the storage tank is too high or too low to cause the equipment to shut down, and ensuring production efficiency.

[0006] In some embodiments, the fluid caching device further comprises a gas-liquid mixer and an air inlet pipe; The gas-liquid mixer is connected to the liquid inlet pipe and is located between the first flow meter and the storage tank; The air inlet pipe is connected to the gas-liquid mixer and is used to transport the gas into the gas-liquid mixer. The beneficial effect is that by arranging the gas-liquid mixer between the first flow meter and the storage tank and communicating with the liquid inlet pipe, the gas-liquid mixer can receive the gas through the air inlet pipe, so that the gas and liquid are mixed and dissolved in the gas-liquid mixer, thereby realizing the application in the direction of gas-liquid dissolution.

[0007] In some embodiments, the fluid caching device further comprises a gas outlet pipe and a gas restrictor; One end of the gas outlet pipe is in communication with the top of the storage tank, and is used to discharge the gas in the storage tank; The gas flow restrictor is arranged on the gas outlet pipe to control the gas flow in the gas outlet pipe. The beneficial effect is that the gas outlet pipe is connected to the top of the storage tank, and the gas flow restrictor is arranged on the gas outlet pipe to limit the gas discharge flow, thereby avoiding the situation that the excess undissolved gas in the storage tank is compressed or expanded, resulting in a large pressure change in the storage tank, improving the gas pressure stability in the storage tank, thereby ensuring the stability of the dissolved gas concentration in the storage tank, and also ensuring that the liquid in and out of the storage tank is balanced.

[0008] In some embodiments, the fluid cache device further includes a connecting pipe, a first liquid level sensor, a second liquid level sensor, a first control valve, a second control valve, and a third control valve; One end of the connecting pipe is connected to the storage tank near the top of the storage tank, and the other end is connected to the storage tank near the bottom of the storage tank; The first liquid level sensor and the second liquid level sensor are arranged on the connecting pipe at intervals, and the positions of the first liquid level sensor and the second liquid level sensor are adjustable, the first liquid level sensor is close to the top of the storage tank, and the second liquid level sensor is close to the bottom of the storage tank, the first liquid level sensor is used to detect the highest liquid level in the storage tank, and the second liquid level sensor is used to detect the lowest liquid level in the storage tank; The first control valve is arranged on the liquid inlet pipe, the second control valve is arranged on the liquid outlet pipe, and the third control valve is arranged on the gas outlet pipe; When the first liquid level sensor detects the liquid level, the first control valve and the third control valve are controlled to be closed; When the second liquid level sensor cannot detect liquid, the second valve is controlled to close. Its beneficial effect is that by using a connecting pipe to communicate with the storage tank, and arranging the first liquid level sensor and the second liquid level sensor on the connecting pipe, the liquid level in the storage tank can be detected in real time, and by controlling the corresponding control valve, the situation of too much or too little liquid in the storage tank can be avoided. And because the positions of the first liquid level sensor and the second liquid level sensor are adjustable, the cumulative error caused by the detection error of the first flow meter and the second flow meter can be calibrated regularly to further ensure that the liquid in and out of the storage tank is balanced, and to avoid the situation where the liquid level in the storage tank is too high or too low, causing the equipment to shut down.

[0009] In some embodiments, the fluid caching device further includes a controller, a third liquid level sensor, and a fourth liquid level sensor; The third liquid level sensor and the fourth liquid level sensor are arranged on the connecting pipe and are located between the first liquid level sensor and the second liquid level sensor, and the third liquid level sensor is located above the fourth liquid level sensor; The controller is electrically connected to the first flow controller, the second flow controller, the first liquid level sensor, the second liquid level sensor, the first control valve, the second control valve and the third control valve; When the third liquid level sensor or the fourth liquid level sensor detects liquid, the first flow meter and the second flow meter need to be calibrated, and the controller controls the first flow controller and the second flow controller to adjust the flow rate of the discharged liquid until the first liquid level sensor and the second liquid level sensor detect no liquid. Its beneficial effect is that the controller is electrically connected to the first flow controller, the second flow controller, the first liquid level sensor, the second liquid level sensor, the first control valve, the second control valve and the third control valve, thereby realizing automatic control. When the third liquid level sensor or the fourth liquid level sensor detects liquid, it can be judged that the first flow meter and the second flow meter may have problems and need to be calibrated. After the first flow meter and the second flow meter are calibrated, the controller controls and adjusts the first flow controller and the second flow controller to maintain the liquid in the storage tank between the third liquid level sensor and the fourth liquid level sensor until the liquid in and out of the storage tank is balanced, and finally the flow value fed back by the first flow meter is equal to the flow value fed back by the second flow meter, so as to further ensure the accuracy of monitoring the liquid level in the storage tank, and the liquid level in the storage tank can be controlled more accurately.

[0010] In some embodiments, a liquid level compensation algorithm is provided in the controller, and the liquid level compensation algorithm satisfies the formula: F d = (H1-H3)*S / T Among them, F d represents the liquid level compensation amount, H1 represents the liquid level height detected by the third liquid level sensor, H3 represents the liquid level height detected by the fourth liquid level sensor, S represents the cross-sectional area of ​​the storage tank, and T represents the time for the liquid level in the storage tank to change from H3 to H1.

[0011] In some embodiments, the fluid caching device further comprises a pressure sensor electrically connected to the controller; The pressure sensor is arranged at the liquid outlet pipe, and is used to detect the actual pressure value in the liquid outlet pipe, and feed the actual pressure value back to the controller; The controller is provided with a preset pressure value, and the controller controls the pump to operate until the actual pressure value is equal to the preset pressure value. Its beneficial effect is that a pressure sensor is arranged on the liquid outlet pipe to detect the water pressure in the liquid outlet pipe. The controller is provided with a preset pressure value, and the controller controls the second flow controller to operate until the actual pressure value detected by the pressure sensor is equal to the preset pressure value, thereby realizing closed-loop control of water pressure on the liquid outlet pipe and ensuring stable output water pressure.

[0012] In some embodiments, the gas-liquid mixer comprises a mixing cavity, wherein the mixing cavity has a mixing structure, and the mixing structure is used to mix gas and liquid; The liquid inlet pipe is in communication with the mixing chamber and is used to transport the liquid into the mixing chamber; The air inlet pipe is connected to the mixing cavity and is used to deliver gas into the mixing cavity. The beneficial effect is that the air inlet pipe is used to deliver gas into the mixing cavity, and the liquid inlet pipe is used to deliver liquid into the mixing cavity, so that the gas and liquid are mixed in the mixing cavity, and the mixing structure is used to achieve mixing and stirring of the liquid and the gas, so as to improve the mixed dissolution rate of the gas and the liquid.

[0013] In some embodiments, the mixing structure includes a plurality of contact platforms, a plurality of bottom separator plates, and a top separator plate; A plurality of contact platforms are arranged at intervals along the axial direction of the mixing chamber to form a step structure, and the contact platforms are close to the liquid inlet pipe; The plurality of top partition plates and the plurality of bottom partition plates are arranged in sequence at intervals, the top partition plates are arranged on the top inner wall of the mixing chamber, the bottom partition plates are arranged on the bottom inner wall of the mixing chamber, and the heights of the plurality of bottom partition plates gradually increase in a direction away from the contact platform.

[0014] In a second aspect, an embodiment of the present invention provides a fluid control method, which is applied to the fluid caching device, and the control method includes: The liquid is transported to the storage tank through the liquid inlet pipe; Using a first flow meter to detect the flow rate in the liquid inlet pipe; Discharging the liquid in the storage tank through the liquid outlet pipe; Using a second flow meter to detect the flow rate in the liquid outlet pipe; The liquid flow in the liquid inlet pipe is controlled by a first flow controller, and the liquid flow in the liquid outlet pipe is controlled by a second flow controller, so that the flow value detected by the first flow meter is equal to the flow value detected by the second flow meter.

[0015] The beneficial effect of the fluid control method provided by the present invention is that the first flow meter and the first flow controller arranged on the liquid inlet pipe are used to control and detect the liquid flow in the liquid inlet pipe, and the second flow meter arranged on the liquid outlet pipe is used to detect the flow in the liquid outlet pipe. The flow of the liquid inlet pipe and the liquid outlet pipe can be detected in time, and the liquid flow in the liquid inlet pipe and the liquid outlet pipe can be quickly adjusted by the first flow controller and the second flow controller to make the flow of the liquid inlet pipe and the liquid outlet pipe equal, thereby ensuring that the liquid in and out of the storage tank remains balanced, avoiding the situation where the liquid level in the storage tank is too high or too low to cause the equipment to shut down, and ensuring production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A schematic structural diagram of a fluid buffer device according to a first embodiment of the present invention; Figure 2 A schematic structural diagram of a fluid buffer device according to a second embodiment of the present invention; Figure 3 A schematic diagram of the internal structure of a gas-liquid mixer according to an embodiment of the present invention; Figure 4 A schematic structural diagram of a fluid buffer device according to a third embodiment of the present invention; Figure 5 A schematic structural diagram of a fluid buffer device according to a fourth embodiment of the present invention; Figure 6 This is a flow chart of a method for controlling fluid according to an embodiment of the present invention.

[0017] Reference numerals: Storage tank 1, liquid inlet pipe 2, first flow controller 3, first flow meter 4, liquid outlet pipe 5, second flow meter 6, gas-liquid mixer 7, mixing chamber 71, gas delivery channel 711, liquid inlet channel 712, contact platform 713, bottom partition plate 714, top partition plate 715, driver 73, rotating shaft 731, bearing 74, air inlet pipe 8, air outlet pipe 9, gas flow restrictor 10, connecting pipe 11, first liquid level sensor 12, second liquid level sensor 13, controller 14, second flow controller 15, pressure sensor 16, third liquid level sensor 17, fourth liquid level sensor 18, first control valve 19, second control valve 20, third control valve 21. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the usual meanings understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Unless otherwise specified, the "connection" described in this article can be a direct connection or an indirect connection, that is, connected through an intermediate.

[0019] In view of the problems existing in the prior art, an embodiment of the present invention provides a fluid buffering device, referring to Figure 1As shown, the fluid buffer device includes a storage tank 1, a liquid inlet pipe 2, a first flow controller 3, a first flow meter 4, a liquid outlet pipe 5, a second flow meter 6 and a second flow controller 15. The storage tank 1 is used to store fluid, one end of the liquid inlet pipe 2 is connected to the storage tank 1, and the other end is connected to an external liquid supply source, and the liquid inlet pipe 2 is used to transport liquid into the storage tank 1. The first flow controller 3 is arranged on the liquid inlet pipe 2, and is used to control the liquid transport flow in the liquid inlet pipe 2. The first flow meter 4 is connected to the liquid inlet pipe 2 and is located between the first flow controller 3 and the storage tank 1, and is used to detect the flow in the liquid inlet pipe 2. The liquid outlet pipe 5 is connected to the storage tank 1, and is used to discharge the liquid in the storage tank 1. The second flow meter 6 is connected to the liquid outlet pipe 5, and is used to detect the flow in the liquid outlet pipe 5. The second flow controller 15 is arranged on the liquid outlet pipe 5, and is used to control the liquid transport flow in the liquid outlet pipe 5.

[0020] In this embodiment, one end of the liquid inlet pipe 2 is connected to the storage tank 1 near the top of the storage tank 1, and one end of the liquid outlet pipe 5 is connected to the storage tank 1 near the bottom of the storage tank 1. The first flow meter 4 and the second flow meter 6 are both liquid flow meters, and by arranging the first flow meter 4 and the first flow controller 3 on the liquid inlet pipe 2 to control and detect the liquid flow in the liquid inlet pipe 2, and arranging the second flow meter 6 on the liquid outlet pipe 5 to detect the flow in the liquid outlet pipe 5, the flow of the liquid inlet pipe 2 and the liquid outlet pipe 5 can be detected in time, and the first flow controller 3 and the second flow controller 15 can quickly adjust the liquid flow in the liquid inlet pipe 2 and the liquid outlet pipe 5 so that the flow of the liquid inlet pipe 2 is equal to that of the liquid outlet pipe 5, ensuring that the liquid in and out of the storage tank 1 is balanced, avoiding the situation where the liquid level in the storage tank 1 is too high or too low to cause the equipment to stop, and ensuring the production efficiency.

[0021] refer to Figure 2 As shown, in some embodiments, the fluid cache device further includes a gas-liquid mixer 7 and an air inlet pipe 8. The gas-liquid mixer 7 is connected to the liquid inlet pipe 2 and is located between the first flowmeter 4 and the storage tank 1, so that the liquid flows into the storage tank 1 after passing through the gas-liquid mixer 7. One end of the air inlet pipe 8 is connected to the gas-liquid mixer 7, and the other end of the air inlet pipe 8 is connected to an external gas supply source, so as to transport the gas into the gas-liquid mixer 7.

[0022] In this embodiment, the gas supply source can provide ozone, and the liquid supply source can provide clean water. The gas-liquid mixer 7 connected to the liquid inlet pipe 2 is arranged between the first flowmeter 4 and the storage tank 1, so that ozone and clean water are mixed and dissolved in the gas-liquid mixer 7 to obtain ozone water, thereby realizing the application in the gas-liquid dissolution direction.

[0023] refer to Figure 2 and Figure 3 As shown, in some embodiments, the gas-liquid mixer 7 includes a mixing chamber 71, the mixing chamber 71 has a mixing structure, the mixing structure is used to mix gas and liquid, the liquid inlet pipe 2 is connected to the mixing chamber 71, and is used to transport liquid into the mixing chamber 71, and the air inlet pipe 8 is connected to the mixing chamber 71, and is used to transport gas into the mixing chamber 71.

[0024] In this embodiment, the air inlet pipe 8 is used to transport gas into the mixing chamber 71, and the liquid inlet pipe 2 is used to transport liquid into the mixing chamber 71, so that the gas and liquid are mixed in the mixing chamber 71, and the liquid is stirred by the mixing structure to improve the mixed dissolution rate of the gas and liquid.

[0025] Specifically, refer to Figure 2 and Figure 3 As shown, the mixing chamber 71 is provided with a gas delivery channel 711, a liquid inlet channel 712 and a liquid outlet channel 716, and the gas delivery channel 711, the liquid inlet channel 712 and the liquid outlet channel 716 are all connected to the mixing chamber 71. The gas inlet pipe 8 is connected to the gas delivery channel 711, the liquid inlet pipe 2 is connected to the liquid inlet channel 712, and the liquid outlet channel 716 is connected to the storage tank 1 through a pipeline. The mixing structure includes a contact platform 713, a bottom partition plate 714 and a top partition plate 715. A plurality of contact platforms 713 are arranged at intervals along the axial direction of the mixing chamber 71 to form a step structure, and the contact platforms 713 are close to the liquid inlet pipe 2. The plurality of top partition plates 715 and the plurality of bottom partition plates 714 are arranged in sequence at intervals, the top partition plates 715 are arranged on the top inner wall of the mixing chamber 71, the bottom partition plates 714 are arranged on the bottom inner wall of the mixing chamber 71, and the heights of the plurality of bottom partition plates 714 gradually increase in the direction away from the contact platform 713.

[0026] In this embodiment, when the liquid flows from the liquid inlet channel 712 to the mixing chamber 71, it will flow from the higher contact platform 713 to the lower contact platform 713 in sequence. In the process of the liquid contacting the contact platform, the contact area between the liquid and the gas will be increased, thereby improving the dissolution rate of the gas and the liquid. In addition, each adjacent bottom partition plate 714 and the top partition plate 715 can cooperate to form a buffer chamber for buffering the gas-liquid mixture. More importantly, since the height of the bottom partition plates 714 gradually increases in the direction away from the liquid inlet channel 712, the reliability of buffering the gas-liquid mixture is greatly improved to ensure the stability of the prepared gas-liquid mixture.

[0027] refer to Figure 2 As shown, in some embodiments, the fluid caching device also includes an outlet pipe 9 and a gas flow restrictor 10, one end of the outlet pipe 9 is connected to the top of the storage tank 1, and is used to discharge the gas in the storage tank 1, and the gas flow restrictor 10 is arranged on the outlet pipe 9, and is used to control the gas flow in the outlet pipe 9.

[0028] In this embodiment, the air outlet pipe 9 is connected to the top of the storage tank 1 so that the gas in the storage tank 1 can be discharged through the air outlet pipe 9, and the gas flow limiter 10 is provided on the air outlet pipe 9 to limit the discharge flow of the gas, thereby preventing the excess undissolved gas in the storage tank 1 from being compressed or expanded, resulting in a large change in the pressure in the storage tank 1, improving the air pressure stability in the storage tank 1, thereby ensuring the stability of the dissolved gas concentration in the storage tank 1, and also ensuring that the liquid in and out of the storage tank 1 remains balanced.

[0029] refer to Figure 5As shown, in some embodiments, the fluid caching device further includes a connecting pipe 11, a first liquid level sensor 12, a second liquid level sensor 13, a first control valve 19, a second control valve 20 and a third control valve 21. One end of the connecting pipe 11 is connected to the storage tank 1 near the top of the storage tank 1, and the other end of the connecting pipe 11 is connected to the storage tank 1 near the bottom of the storage tank 1, so that the liquid in the storage tank 1 can flow into the connecting pipe 11. The first liquid level sensor 12 and the second liquid level sensor 13 are arranged on the connecting pipe 11 at intervals, and the positions of the first liquid level sensor 12 and the second liquid level sensor 13 arranged on the connecting pipe 11 are adjustable. The first liquid level sensor 12 is close to the top of the storage tank 1, and is used to detect whether the liquid level in the storage tank 1 is too high. The second liquid level sensor 13 is close to the bottom of the storage tank 1, and is used to detect whether the liquid level in the storage tank 1 is too low. The first control valve 19 is disposed on the liquid inlet pipe 2 , the second control valve 20 is disposed on the liquid outlet pipe 5 , and the third control valve 21 is disposed on the gas outlet pipe 9 .

[0030] When the first liquid level sensor 12 detects the liquid level, the first control valve 19 and the third control valve 21 are controlled to be closed. When the second liquid level sensor 13 detects no liquid, the second valve 20 is controlled to be closed.

[0031] In this embodiment, the connecting pipe 11 is connected to the storage tank 1, and the first liquid level sensor 12 and the second liquid level sensor 13 are arranged on the connecting pipe 11, so that the liquid level in the storage tank 1 can be detected in real time, so as to timely control and adjust the liquid level in the storage tank 1. In addition, since the positions of the first liquid level sensor 12 and the second liquid level sensor 13 arranged on the connecting pipe 11 are adjustable, the accumulated error caused by the detection error of the first flow meter 4 and the second flow meter 6 can be calibrated regularly, so as to further ensure that the liquid in and out of the storage tank 1 is balanced, and avoid the situation that the liquid level in the storage tank 1 is too high or too low, causing the equipment to shut down.

[0032] refer to Figure 5As shown, in some embodiments, the fluid cache device further includes a controller 14, a third liquid level sensor 17 and a fourth liquid level sensor 18. The controller 14 is electrically connected to the first flow controller 3, the second flow controller 15, the first liquid level sensor 12, the second liquid level sensor 13, the third liquid level sensor 17, the fourth liquid level sensor 18, the first control valve 19, the second control valve 20 and the third control valve 21. The third liquid level sensor 17 and the fourth liquid level sensor 18 are arranged on the connecting pipe 11 and are located between the first liquid level sensor 12 and the second liquid level sensor 13. The third liquid level sensor 17 is located above the fourth liquid level sensor 18. The third liquid level sensor 17 and the fourth liquid level sensor 18 will feed back the detected liquid level information to the controller 14. The controller 14 adjusts the first flow controller 3 and the second flow controller 15 according to the liquid level information so that the flow value fed back by the first flow meter 4 is equal to the flow value fed back by the second flow meter 6.

[0033] For example, when the flow value fed back by the first flow meter 4 is equal to the flow value fed back by the second flow meter 6, and the third liquid level sensor 17 or the fourth liquid level sensor 18 still detects liquid, it proves that the first flow meter 4 and the second flow meter 6 need to be calibrated at this time. After calibrating the first flow meter 4 and the second flow meter 6, the controller 14 controls the first flow controller 3 and the second flow controller 15 to adjust the flow rate of the discharged liquid until the third liquid level sensor 17 or the fourth liquid level sensor 18 detects no liquid.

[0034] In this embodiment, the first flow controller 3 and the second flow controller 15 can be pumps or flow control valves, and the controller 14 can timely adjust the discharge flow of the first flow controller 3 and the second flow controller 15 according to the liquid level information detected by the third liquid level sensor 17 or the fourth liquid level sensor 18 until the flow value fed back by the first flow meter 4 is equal to the flow value fed back by the second flow meter 6, so as to ensure that the liquid in and out of the storage tank 1 remains balanced.

[0035] It can be understood that the third liquid level sensor 17 and the fourth liquid level sensor 18 are used to detect whether the liquid level in the storage tank 1 is maintained within a normal range. When the third liquid level sensor 17 or the fourth liquid level sensor 18 detects liquid, it can be determined that the flow rate of the liquid inlet pipe 2 is inconsistent with the flow rate of the liquid outlet pipe 5. At this time, the staff can be reminded of the current status of the fluid cache device in a timely manner. If the fluid cache device is not processed in time, and after a long period of operation, the liquid level in the storage tank 1 will continue to rise or fall until the liquid level reaches the position of the first liquid level sensor 12 or the second liquid level sensor 13. At this time, the fluid cache device will give a reminder signal again to remind the staff that the fluid cache device has a fault, and the controller 14 automatically controls the corresponding first control valve 19, the second control valve 20 or the third control valve to open or close according to the received feedback information.

[0036] In some embodiments, the controller 14 is provided with a liquid level compensation algorithm program, and the liquid level compensation algorithm program satisfies the formula: F d = (H1-H3)*S / T Among them, F d represents the liquid level compensation amount, H1 represents the liquid level height detected by the third liquid level sensor 17, H3 represents the liquid level height detected by the fourth liquid level sensor 18, S represents the cross-sectional area of ​​the storage tank 1, and T represents the time for the liquid level in the storage tank 1 to change from H3 to H1. By calculating the liquid level compensation amount F d The controller 14 can be configured to compensate the liquid level according to the liquid level compensation amount F d Control the liquid outflow rate and the liquid inflow rate so that the liquid level in the storage tank 1 is adjusted to between the third liquid level sensor 17 and the fourth liquid level sensor 18 as soon as possible. When the liquid level in the storage tank 1 is adjusted to between the third liquid level sensor 17 and the fourth liquid level sensor 18, adjust the first flow controller 3 and the second flow controller 15 to make the liquid outflow rate and the liquid inflow rate the same.

[0037] It can be understood that the use of the first liquid level sensor, the second liquid level sensor, the third liquid level sensor 17 and the fourth liquid level sensor 18 in combination greatly improves the reliability of the fluid cache device in caching liquid. Because when the actual liquid outflow rate is different from the liquid inflow rate, the third liquid level sensor 17 and the fourth liquid level sensor 18 will detect the liquid level change in advance, and can remind the staff that the liquid level in the storage tank 1 rises or falls. If the staff fails to discover and handle it in time, with long-term operation, the first liquid level sensor 12 can detect the liquid or the second liquid level sensor 13 will not detect the liquid, and further remind the staff, and the controller 14 is provided with a liquid level compensation algorithm program, which can calculate the required liquid level compensation, so as to quickly complete the adjustment of the liquid level in the storage tank 1.

[0038] In addition, when the storage tank 1 is required to store more liquid, the controller 14 can adjust the first flow controller 3 and the second flow controller 15 so that the liquid level in the storage tank 1 is located between the first liquid level sensor 12 and the third liquid level sensor 17, and as close to the first liquid level sensor 12 as possible.

[0039] Continue to refer Figure 5 As shown, in some embodiments, the fluid cache device further includes a pressure sensor 16 electrically connected to the controller 14. The pressure sensor 16 is provided in the liquid outlet pipe 5, and is used to detect the actual pressure value in the liquid outlet pipe 5, and feed the actual pressure value back to the controller 14. The second flow controller 15 is provided in the liquid outlet pipe 5, and is located between the second flow meter 6 and the pressure sensor 16, and is used to adjust the pressure in the liquid outlet pipe 5. A preset pressure value is provided in the controller 14, and the controller 14 controls the second flow controller 15 to operate until the actual pressure value is equal to the preset pressure value.

[0040] In this embodiment, the second flow controller 15 is a pressure pump, which is provided on the liquid outlet pipe 5 to adjust the discharge pressure of the liquid in the liquid outlet pipe 5, and the pressure sensor 16 is provided on the liquid outlet pipe 5 to detect the water pressure in the liquid outlet pipe 5, so as to adjust and control the pressure in the liquid outlet pipe 5. It should be noted that, since a preset pressure value is provided in the controller 14, the controller 14 controls the second flow controller 15 to operate until the actual pressure value detected by the pressure sensor 16 is equal to the preset pressure value, thereby realizing closed-loop control of the water pressure on the liquid outlet pipe 5 and ensuring the stability of the output water pressure.

[0041] refer to Figures 1 to 6As shown, in another embodiment provided by the present invention, a fluid control method is provided, and the control method is applied to the fluid cache device. The control method includes: S601: The liquid is transported to the storage tank through the liquid inlet pipe.

[0042] S602: Using a first flow meter to detect the flow rate in the liquid inlet pipe.

[0043] S603: Discharge the liquid in the storage tank through the liquid outlet pipe.

[0044] S604: Use a second flow meter to detect the flow rate in the liquid outlet pipe.

[0045] S605: Control the liquid flow in the liquid inlet pipe by a first flow controller, and control the liquid flow in the liquid outlet pipe by a second flow controller, so that the flow value detected by the first flow meter is equal to the flow value detected by the second flow meter.

[0046] In this embodiment, the first flow meter 4 and the first flow controller 3 arranged on the liquid inlet pipe 2 are used to control and detect the liquid flow in the liquid inlet pipe 2, and the second flow meter 6 arranged on the liquid outlet pipe 5 is used to detect the flow in the liquid outlet pipe 5. The flow rates of the liquid inlet pipe 2 and the liquid outlet pipe 5 can be detected in time, and the liquid flow in the liquid inlet pipe 2 can be quickly adjusted by the first flow controller 3, and the liquid flow in the liquid outlet pipe 5 can be controlled by the second flow controller 15, so that the flow rates of the liquid inlet pipe 2 and the liquid outlet pipe 5 are equal, thereby ensuring that the liquid in and out of the storage tank 1 remains balanced, avoiding the situation where the liquid level in the storage tank 1 is too high or too low to cause equipment shutdown, and ensuring production efficiency.

[0047] The above is only a specific implementation of the embodiment of the present application, but the protection scope of the embodiment of the present application is not limited thereto, and any changes or replacements within the technical scope disclosed in the embodiment of the present application should be included in the protection scope of the embodiment of the present application. Therefore, the protection scope of the embodiment of the present application should be based on the protection scope of the claims.

Claims

1. A fluid caching device, characterized in that: include: Storage tanks; A liquid inlet pipe, connected to the storage tank, and used to transport the liquid into the storage tank; A first flow controller, disposed in the liquid inlet pipe, for controlling the liquid delivery flow in the liquid inlet pipe; a first flow meter connected to the liquid inlet pipe and located between the first flow controller and the storage tank, and used for detecting the flow in the liquid inlet pipe; A liquid outlet pipe, connected to the storage tank, and used to discharge the liquid in the storage tank; a second flow meter, connected to the liquid outlet pipe, for detecting the flow rate in the liquid outlet pipe; The second flow controller is arranged in the liquid outlet pipe and is used for controlling the liquid delivery flow in the liquid outlet pipe.

2. The fluid caching device according to claim 1, characterized in that: It also includes a gas-liquid mixer and an air intake pipe; The gas-liquid mixer is connected to the liquid inlet pipe and is located between the first flow meter and the storage tank; The air inlet pipe is connected to the gas-liquid mixer and is used for conveying gas into the gas-liquid mixer.

3. The fluid caching device according to claim 2, characterized in that: Also included is a gas outlet pipe and a gas restrictor; One end of the gas outlet pipe is in communication with the top of the storage tank, and is used to discharge the gas in the storage tank; The gas flow restrictor is arranged on the gas outlet pipe and is used for controlling the gas flow in the gas outlet pipe.

4. The fluid caching device according to any one of claim 3, characterized in that: It also includes a connecting pipe, a first liquid level sensor, a second liquid level sensor, a first control valve, a second control valve and a third control valve; One end of the connecting pipe is connected to the storage tank near the top of the storage tank, and the other end is connected to the storage tank near the bottom of the storage tank; The first liquid level sensor and the second liquid level sensor are arranged on the connecting pipe at intervals, and the positions of the first liquid level sensor and the second liquid level sensor are adjustable, the first liquid level sensor is close to the top of the storage tank, and the second liquid level sensor is close to the bottom of the storage tank, the first liquid level sensor is used to detect the highest liquid level in the storage tank, and the second liquid level sensor is used to detect the lowest liquid level in the storage tank; The first control valve is arranged on the liquid inlet pipe, the second control valve is arranged on the liquid outlet pipe, and the third control valve is arranged on the gas outlet pipe; When the first liquid level sensor detects the liquid level, the first control valve and the third control valve are controlled to be closed; When the second liquid level sensor detects no liquid, the second valve is controlled to close.

5. The fluid caching device according to claim 4, characterized in that: Also includes a controller, a third liquid level sensor and a fourth liquid level sensor; The third liquid level sensor and the fourth liquid level sensor are arranged on the connecting pipe and are located between the first liquid level sensor and the second liquid level sensor, and the third liquid level sensor is located above the fourth liquid level sensor; The controller is electrically connected to the first flow controller, the second flow controller, the first liquid level sensor, the second liquid level sensor, the first control valve, the second control valve and the third control valve; When the third liquid level sensor or the fourth liquid level sensor detects liquid, the first flow meter and the second flow meter need to be calibrated, and the controller controls the first flow controller and the second flow controller to adjust the flow rate of the discharged liquid until the first liquid level sensor and the second liquid level sensor detect no liquid.

6. The fluid caching device according to claim 5, characterized in that: The controller is provided with a liquid level compensation algorithm program, and the liquid level compensation algorithm program satisfies the formula: F d =(H1-H3)*S / T Among them, F d represents the liquid level compensation amount, H1 represents the liquid level height detected by the third liquid level sensor, H3 represents the liquid level height detected by the fourth liquid level sensor, S represents the cross-sectional area of ​​the storage tank, and T represents the time for the liquid level in the storage tank to change from H3 to H1.

7. The fluid caching device according to claim 5, characterized in that: Also included is a pressure sensor electrically connected to the controller; The pressure sensor is arranged at the liquid outlet pipe, and is used to detect the actual pressure value in the liquid outlet pipe, and feed the actual pressure value back to the controller; A preset pressure value is set in the controller, and the controller controls the second flow controller to operate until the actual pressure value is equal to the preset pressure value.

8. The fluid caching device according to claim 2, characterized in that: The gas-liquid mixer comprises a mixing cavity, wherein the mixing cavity has a mixing structure, and the mixing structure is used to mix gas and liquid; The liquid inlet pipe is in communication with the mixing chamber and is used to transport the liquid into the mixing chamber; The air inlet pipe is in communication with the mixing chamber and is used for delivering gas into the mixing chamber.

9. The fluid caching device according to claim 8, characterized in that: The mixing structure includes a plurality of contact platforms, a plurality of bottom partition plates and a top partition plate; A plurality of contact platforms are arranged at intervals along the axial direction of the mixing chamber to form a step structure, and the contact platforms are close to the liquid inlet pipe; The plurality of top partition plates and the plurality of bottom partition plates are arranged in sequence at intervals, the top partition plates are arranged on the top inner wall of the mixing chamber, the bottom partition plates are arranged on the bottom inner wall of the mixing chamber, and the heights of the plurality of bottom partition plates gradually increase in a direction away from the contact platform.

10. A method for controlling a fluid, characterized in that: Applied to the fluid caching device according to any one of claims 1 to 9, the control method comprises: The liquid is transported to the storage tank through the liquid inlet pipe; Using a first flow meter to detect the flow rate in the liquid inlet pipe; Discharging the liquid in the storage tank through the liquid outlet pipe; Using a second flow meter to detect the flow rate in the liquid outlet pipe; The liquid flow in the liquid inlet pipe is controlled by a first flow controller, and the liquid flow in the liquid outlet pipe is controlled by a second flow controller, so that the flow value detected by the first flow meter is equal to the flow value detected by the second flow meter.

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