Accurate quantitative adding equipment for preservatives

Abstract

The invention relates to the technical field of preservative adding, and discloses precise quantitative adding equipment for preservatives. In order to solve the problems of relatively low safety and relatively low precision in the prior art, through a high-position box body, a weighing tank, an infusion pump A, a discharging valve, an infusion pump B and a feeding valve, and through an external batching pot weighing system, the quantity of preservatives needed by current materials is calculated, and data is sent to a central control unit; the central control unit controls the feeding valve and the infusion pump B to be opened, the infusion pump B is used for pumping the preservative in the high-position box body into the weighing tank, a weighing sensor in the weighing tank weighs the preservative in real time, and when a determined numerical value is reached, some pollution risks caused by manual feeding in the production process are avoided; the corrosion of the preservative to equipment and the harm to operators are avoided, the preservative can be accurately added, and the product quality is kept stable.

Description

Technical Field

[0001] This invention relates to the field of preservative addition technology, and more particularly to a device for precise quantitative addition of preservatives. Background Technology

[0002] Preservatives are used in the production of dishwashing liquid to prevent product spoilage due to bacterial contamination. This improves product quality, reduces costs, and significantly extends shelf life. Kathon, a powerful, broad-spectrum, highly effective, and non-toxic green additive, has been widely adopted in dishwashing liquids and other similar products.

[0003] This preservative's main components are 5-chloro-2-methyl-4-isothiazolin-3-one (CIT) and 2-methyl-4-isothiazolin-3-one (MIT). Isothiazolinones exert their bactericidal effect by breaking the bonds in bacterial and algal proteins. Upon contact with microorganisms, isothiazolinones rapidly and irreversibly inhibit their growth, leading to cell death. Therefore, they have a strong inhibitory and bactericidal effect on common bacteria, fungi, and algae, exhibiting high bactericidal efficiency, good degradability, and characteristics such as no residue, good compatibility, strong stability, and low cost. They are miscible with chlorine and most anionic, cationic, and nonionic surfactants. This effectively extends the shelf life of detergents and reduces the safety risks caused by spoilage.

[0004] Regarding the aforementioned and existing related technologies, the inventors believe that the following drawbacks often exist: Currently, preservatives are generally added manually to the mixing pot after weighing. Manual addition has two drawbacks: first, the mixing pot is not sealed, allowing it to come into contact with air and potentially introduce other contaminants, affecting product quality; second, the weighing process can easily cause liquid splashing, and high concentrations of methylisothiazolinone are highly allergenic. Direct contact with high concentrations of isothiazolinone may cause contact dermatitis, manifesting as redness, swelling, itching, and peeling. Therefore, direct contact should be avoided during production. Furthermore, this raw material is highly acidic and corrosive to common metal materials. Additionally, to avoid the risks associated with insufficient addition of methylisothiazolinone or excessive addition in detergents, which could weaken the bactericidal effect, further consideration must be given. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing technology has the disadvantages of low safety and low accuracy. To address this, we propose a device for precise quantitative addition of preservatives.

[0006] To achieve the above objectives, this application adopts the following technical solution: a preservative precise quantitative addition device, including a high-level box for placing the preservative, a connecting component is provided on one side of the high-level box, a main box is provided at one end of the connecting component, a weighing tank for weighing the preservative is provided inside the main box, a weighing sensor is provided inside the weighing tank, a discharge pipe is provided on one side of the weighing tank, a liquid pump A is provided at one end of the discharge pipe, and a discharge valve is provided inside the discharge pipe; The connecting component includes a liquid pump B installed on the outer surface of the high-level box. One end of the liquid pump B is provided with a silicone tube, one end of the silicone tube is provided with a feed valve, one end of the feed valve is provided with a liquid inlet pipe, and one end of the liquid inlet pipe passes through the main box and is connected to the weighing tank. A central control unit is installed on the outer surface of the high-level box. The central control unit is connected to the weighing system of the external batching pot and is also connected to the feed valve, discharge valve, liquid pump A, and liquid pump B.

[0007] Preferably, the lower ends of the high-level enclosure and the main enclosure are provided with a base, both sides of the base are provided with anti-vibration bolts, and the upper surface of the base is provided with a glass cover, which is located on the outside of the high-level enclosure and the main enclosure.

[0008] Preferably, an outer groove is provided on one side of the glass cover, and an inspection door is hinged to the outer groove. An inner groove is provided on one side of the main body, and the inner groove is opposite to the outer groove and the position of the weighing sensor inside the weighing tank is opposite to the inner groove.

[0009] Preferably, the upper end of the high-level box is provided with an end plate, and a cover plate is hinged to one side of the end plate. The positions of the end plate and the cover plate are opposite to the position of the feed inlet of the high-level box.

[0010] Preferably, the upper end of the main body is provided with a mounting plate, and the upper end of the mounting plate is provided with an air blowing valve and an air venting valve. The lower ends of the air blowing valve and the air venting valve extend through the mounting plate into the weighing tank.

[0011] Preferably, the upper end of the mounting plate is provided with an annular pipe and an air pump, one end of the air pump is provided with a connecting conduit, one end of the connecting conduit is connected to the annular pipe, and the inner wall of the weighing tank is provided with an air outlet component, which is connected to the annular pipe through a flexible hose.

[0012] Preferably, the venting component includes a venting pipe located inside the weighing tank. The lower end of the venting pipe has an inclined surface with a venting hole. A fixing block is provided on one side of the venting pipe, and an industrial camera is provided on one side of the fixing block. A liquid level sensor is provided on the bottom surface of the fixing block. An electric push rod is provided at the upper end of the fixing block, and one end of the electric push rod is connected to a mounting plate. A flexible hose connects the venting pipe and the annular pipe.

[0013] Preferably, the outer wall of the weighing tank is provided with a synchronization tube, and the inside of the synchronization tube is provided with a pressure rod and a pressure cylinder. One end of the pressure rod is provided with a magnetic block, and the other end of the pressure rod is provided with a piston plate. The piston plate is located inside the pressure cylinder. The outer wall of the air outlet pipe is embedded with a strong magnetic plate, and the strong magnetic plate and the magnetic block are attracted by magnetism.

[0014] Preferably, an external discharge pipe is provided on the outer surface of the pressure cylinder, one end of which extends into the weighing tank and is opposite to the discharge pipe opening. A pressure valve is provided inside the external discharge pipe, and a one-way valve pipe is also provided on the outer surface of the pressure cylinder, which is connected to the outside.

[0015] Preferably, the central control unit includes a signal receiving module, which is connected to a real-time processing module. The real-time processing module is connected to a verification and inspection module. The signal receiving module is connected to an external batching pot weighing system, a liquid level sensor, and an industrial camera. The real-time processing module is connected to the feed valve, the discharge valve, and the air pump. The liquid level sensor collects the real-time data on the vent hole and the level of the preservative liquid. At the same time, the industrial camera monitors the vent hole's venting effect in real time and detects whether the preservative splashes.

[0016] The technical effects and advantages of this invention are as follows: In this invention, a high-level tank, weighing tank, pump A, discharge valve, pump B, and feed valve are used. An external batching pot weighing system calculates the required amount of preservative for the current material and sends the data to a central control unit. The central control unit then controls the feed valve and pump B to open, allowing pump B to draw the preservative from the high-level tank into the weighing tank. An internal weighing sensor continuously weighs the preservative. When a predetermined value is reached, the central control unit closes the feed valve and pump B. Workers then use the central control unit to re-verify the preservative weighing. If the data is correct, the discharge valve and pump A are opened to pump the weighed preservative into the batching pot. This closed-loop system ensures the entire production process avoids the pollution risks associated with manual material feeding, prevents corrosion of equipment by the preservative, and minimizes harm to operators. It also allows for precise addition of the preservative, maintaining stable product quality. Attached Figure Description

[0017] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 Schematic diagram of the overall structure of the preservative precise quantitative addition device of the present invention Figure 1 ; Figure 2 Schematic diagram of the overall structure of the preservative precise quantitative addition device of the present invention Figure 2 ; Figure 3 This is a schematic diagram of the high-level box structure of the preservative precise quantitative addition device of the present invention; Figure 4 Schematic diagram of the main body structure of the preservative precise quantitative addition device of the present invention Figure 1 ; Figure 5 Schematic diagram of the main body structure of the preservative precise quantitative addition device of the present invention Figure 2 ; Figure 6 This is a schematic diagram of the weighing tank structure of the preservative precise quantitative addition device of the present invention; Figure 7 This is a schematic diagram of the internal structure of the synchronous tube of the preservative precise quantitative addition device of the present invention; Figure 8 This is a schematic diagram of the air outlet component of the device for precise quantitative addition of preservatives according to the present invention; Figure 9 The flowchart shows the central control unit program of the device for precise quantitative addition of preservatives according to the present invention.

[0018] Legend: 1. Base; 2. Anti-vibration bolts; 3. Glass cover; 4. Inspection door; 5. Central control unit; 51. Signal receiving module; 52. Real-time processing module; 53. Verification and inspection module; 6. High-level enclosure; 61. End plate; 62. Liquid pump B; 63. Silicone tubing; 64. Feed valve; 7. Main enclosure; 71. Internal slot; 72. Mounting plate; 73. Circular tube; 74. Air pump; 75. Connecting conduit; 76. Air blowing valve; 77. Exhaust valve 8. Valve; 9. Weighing tank; 10. Discharge pipe; 11. Discharge valve; 12. Liquid pump A; 13. Liquid inlet pipe; 14. Air outlet component; 15. Air outlet pipe; 16. Inclined surface; 17. Air outlet hole; 18. Fixing block; 19. Industrial camera; 20. Liquid level sensor; 21. Electric push rod; 22. High-strength magnetic plate; 33. Synchronization pipe; 44. Pressure rod; 55. Pressure cylinder; 66. One-way valve pipe; 77. External discharge pipe; 88. Pressure valve; 99. Magnetic block. Detailed Implementation

[0019] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0020] Reference Figures 1-5 and Figure 9As shown, the present invention provides a technical solution: a device for precise quantitative addition of preservatives, including a high-level box 6 for placing preservatives, a connecting component on one side of the high-level box 6, a main box 7 at one end of the connecting component, a weighing tank 8 for weighing preservatives inside the main box 7, a weighing sensor inside the weighing tank 8, a discharge pipe 81 on one side of the weighing tank 8, a liquid pump A83 at one end of the discharge pipe 81, and a discharge valve 82 inside the discharge pipe 81.

[0021] The connecting component includes a liquid pump B62 installed on the outer surface of the high-level box 6. One end of the liquid pump B62 is provided with a silicone tube 63, one end of the silicone tube 63 is provided with a feed valve 64, one end of the feed valve 64 is provided with a liquid inlet pipe 85, and one end of the liquid inlet pipe 85 passes through the main box 7 and is connected to the weighing tank 8.

[0022] A central control unit 5 is installed on the outer surface of the high-level tank 6. The central control unit 5 is connected to the external batching pot weighing system and is also connected to the feed valve 64, discharge valve 82, and liquid pump A83 and liquid pump B62. The preservative is stored inside the high-level tank 6. The external batching pot weighing system calculates the amount of preservative needed for the current material and sends the data to the central control unit 5. The central control unit 5 then controls the feed valve 64 and liquid pump B62 to open, and the liquid pump B62 draws the preservative from the high-level tank 6 into the weighing tank 8. The internal weighing sensor of the tank 8 is activated. The preservative is weighed regularly. When the measured value is reached, the central control unit 5 controls the feed valve 64 and the pump B62 to close. The staff then uses the central control unit 5 to re-verify the weighing of the preservative. If the data is correct, the discharge valve 82 and the pump A83 are opened to pump the weighed preservative into the mixing pot. In addition, both the feed valve 64 and the discharge valve 82 are ultra-short-pitch pneumatic ball valves, which are characterized by compact structure, small size, good sealing performance, reliable operation, fast response speed of pneumatic actuator, hysteresis ≤1.5%, low frictional resistance, and support for 4-20mA signal control.

[0023] Reference Figures 1-9 As shown in this implementation scheme: a base 1 is provided at the lower end of the high-level box 6 and the main box 7. Anti-vibration bolts 2 are provided on both sides of the base 1. A glass cover 3 is provided on the upper surface of the base 1. The glass cover 3 is located outside the high-level box 6 and the main box 7. The base 1 is made of stainless steel and is fixed to the batching platform by the anti-vibration bolts 2. The high-level box 6 and the weighing tank 8 are both made of 316 stainless steel. The glass cover 3 is used to isolate the operating equipment from the production area environment.

[0024] An outer groove is provided on one side of the glass cover 3, and an inspection door 4 is hinged to the outer groove. An inner groove 71 is provided on one side of the main housing 7. The inner groove 71 is opposite to the outer groove, and the inner groove 71 is opposite to the position of the weighing sensor in the weighing tank 8. When the weighing sensor malfunctions, the inspection door 4 can be opened, and the weighing sensor can be inspected and replaced through the outer groove and the inner groove 71, thereby improving work efficiency and quality.

[0025] The upper end of the high-level box 6 is provided with an end plate 61, and a cover plate is hinged to one side of the end plate 61. The positions of the end plate 61 and the cover plate are opposite to the feed inlet of the high-level box 6. The working volume of the high-level box 6 is 80L. By opening the cover plate, the produced preservative can be put into the high-level box 6.

[0026] The upper end of the main housing 7 is provided with a mounting plate 72. The upper end of the mounting plate 72 is provided with an air blowing valve 76 and an air venting valve 77. The lower ends of the air blowing valve 76 and the air venting valve 77 extend through the mounting plate 72 into the weighing tank 8. The air blowing valve 76 and the air venting valve 77 ensure the pressure balance inside the weighing tank 8, so that the material inside the weighing tank 8 can be completely added to the batching pot, making the weighing more stable. Specifically, when the weighing tank 8 is being fed, the preservative will gradually fill the internal space of the weighing tank 8, and the air inside needs to be discharged to the outside through the air venting valve 77. When the weighing tank 8 is discharging, the air blowing valve 76 is opened and connected to the external dry air source. Air is blown into the weighing tank 8 through the air blowing valve 76 to increase the pressure inside the weighing tank 8, promote the discharge, and improve the discharge efficiency.

[0027] The upper end of the mounting plate 72 is provided with an annular pipe 73 and an air pump 74. One end of the air pump 74 is provided with a connecting conduit 75, and one end of the connecting conduit 75 is connected to the annular pipe 73. The inner wall of the weighing tank 8 is provided with an air outlet component 9, which is connected to the annular pipe 73 through a hose. When the air pump 74 is turned on, the air pump 74 can draw air into the annular pipe 73, and then enter the air outlet component 9 through the annular pipe 73, and then be ejected from the air outlet component 9.

[0028] The venting component 9 includes a venting pipe 91 located inside the weighing tank 8. A slope 92 is formed at the lower end of the venting pipe 91, and a venting hole 93 is formed on the slope 92. A fixing block 94 is provided on one side of the venting pipe 91, and an industrial camera 95 is provided on one side of the fixing block 94. A liquid level sensor 96 is provided on the lower surface of the fixing block 94. An electric push rod 97 is provided at the upper end of the fixing block 94, and one end of the electric push rod 97 is connected to the mounting plate 72. A flexible hose connects the venting pipe 91 and the annular pipe 73. During operation, the electric push rod 97 is activated, and the electric push rod 97 extends, causing the air outlet pipe 91 to move up and down along the inner wall of the weighing tank 8. At the same time, the air pump 74 is turned on, and the air pump 74 draws in the air and sprays it out from the air outlet 93. Since the slope of the inclined surface 92 faces the inner wall of the weighing tank 8, the air sprayed out from the air outlet 93 also faces the inner wall of the weighing tank 8, blowing air onto the inner wall of the weighing tank 8. At the same time, as the air outlet pipe 91 moves, one end of the air outlet pipe 91 also scrapes the inner wall of the weighing tank 8.

[0029] The outer wall of the weighing tank 8 is provided with a synchronization tube 10. Inside the synchronization tube 10, there is a pressure rod 101 and a pressure cylinder 102. One end of the pressure rod 101 is provided with a magnetic block 106, and the other end of the pressure rod 101 is provided with a piston plate. The piston plate is located inside the pressure cylinder 102. The outer wall of the air outlet pipe 91 is embedded with a strong magnetic plate 98. The strong magnetic plate 98 and the magnetic block 106 are magnetically attracted. When the air outlet pipe 91 moves up and down, the strong magnetic plate 98 and the magnetic block 106 are magnetically attracted, which will drive the pressure rod 101 to move together. When the pressure rod 101 moves downward, the piston plate squeezes the air inside the pressure cylinder 102.

[0030] An external discharge pipe 104 is provided on the outer surface of the pressure cylinder 102. One end of the external discharge pipe 104 extends into the weighing tank 8 and is opposite to the outlet of the discharge pipe 81. A pressure valve 105 is provided inside the external discharge pipe 104. A one-way valve pipe 103 is also provided on the outer surface of the pressure cylinder 102. The one-way valve pipe 103 is connected to the outside. As the magnetic block 106 moves down with the powerful magnetic plate 98, the pressure rod 101 performs piston movement inside the pressure cylinder 102, that is, the pressure rod 101 will continuously squeeze. When the outlet pipe 91 moves down to the lowest point, the pressure rod 101 stops compressing the gas inside the pressure cylinder 102. The gas inside the pressure cylinder 102 reaches the maximum value of the pressure valve 105, thereby opening the pressure valve 105 and ejecting the gas inside the pressure cylinder 102. This ejects the residual anti-corrosion agent at the outlet of the discharge pipe 81, improving the discharge rate. In addition, during the downward movement of the pressure rod 101, the one-way valve pipe 103 closes. When the pressure rod 101 moves up, the one-way valve pipe 103 opens, drawing in external gas.

[0031] The central control unit 5 includes a signal receiving module 51, which is connected to a real-time processing module 52. The real-time processing module 52 is connected to a verification module 53. The signal receiving module 51 is connected to an external batching pot weighing system, a liquid level sensor 96, and an industrial camera 95. The real-time processing module 52 is connected to the feed valve 64, the discharge valve 82, and the air pump 74. The liquid level sensor 96 collects real-time data on the vent hole 93 and the preservative liquid level. Simultaneously, the industrial camera 95 monitors the venting effect of the vent hole 93 in real-time, detecting any preservative splashing. The vent hole 93 has a diameter of 1mm and 16 holes. The vent hole 93 is inclined at a 45º angle to the inner wall of the weighing cylinder, and the total cross-sectional area of ​​the diffuser outlet is... Where d=20, the height of the vent 93 and the preservative liquid level is detected by the liquid level sensor 96 and recorded as h. The value of h is transmitted to the signal receiving module 51 in real time. The central control unit 5 has a built-in quantitative matching table between h and airflow Q. The specific matching relationship is as follows: when hour, ,when hour, ,when hour, ,when hour, And the absolute upper limit of Q ; A proportional flow valve is installed at the air inlet of the air pump 74 to adjust the air intake flow rate. The adjustment range is as follows: ; Established in the central control unit 5 The absolute threshold is determined by detecting whether liquid splashes through an industrial camera. When liquid splashes, Q is immediately reduced to the lower limit of the range corresponding to the current h value, and then steadily increased to the optimal value after 2 seconds. Specifically, the following steps are included: S1: When the weighing tank 8 begins to discharge the preservative, the vent pipe 91 moves down along the inner wall of the weighing tank 8 and starts to discharge air at the same time. The liquid level sensor 96 is used to detect the liquid level height in real time and record it as h. S2: Based on the current h value, query the built-in hQ matching lookup table and adjust the airflow Q to the corresponding range through the proportional flow valve; S3: During the air blowing process, the central control unit 5 continuously collects the h value and Q value, and calibrates and adjusts them in real time. At the same time, the industrial camera 95 monitors whether liquid splashes and triggers corresponding emergency measures.

[0032] Working principle: The real-time processing module 52 opens the feed valve 64 and the liquid pump B62 to draw the preservative in the high-level tank 6 into the weighing tank 8. The internal weighing sensor weighs the preservative in real time. When the value is reached, the real-time processing module 52 controls the feed valve 64 and the liquid pump B62 to close. Then, the staff verifies the weight in the weighing tank 8 through the verification module 53. After confirming that it is correct, the batching operator manually presses the verification button. At this time, the real-time processing module 52 opens the discharge valve 82 and the liquid pump A83 to pump the weighed preservative into the batching pot. In addition, after each addition or after the end of daily production, the batching operator can verify the inventory and usage of the preservative to ensure the accuracy of the actual addition.

[0033] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A device for precisely metering the addition of preservatives, characterized in that, It includes a high-level box for holding preservatives, a connecting component on one side of the high-level box, a main box at one end of the connecting component, a weighing tank for weighing preservatives inside the main box, a weighing sensor inside the weighing tank, a discharge pipe on one side of the weighing tank, a liquid pump A at one end of the discharge pipe, and a discharge valve inside the discharge pipe. The connecting component includes a liquid pump B installed on the outer surface of the high-level box. One end of the liquid pump B is provided with a silicone tube, one end of the silicone tube is provided with a feed valve, one end of the feed valve is provided with a liquid inlet pipe, and one end of the liquid inlet pipe passes through the main box and is connected to the weighing tank. A central control unit is installed on the outer surface of the high-level box. The central control unit is connected to the weighing system of the external batching pot and is also connected to the feed valve, discharge valve, liquid pump A, and liquid pump B.

2. The preservative precise quantitative addition device according to claim 1, characterized in that: The lower ends of the high-level enclosure and the main enclosure are equipped with bases, and anti-vibration bolts are installed on both sides of the bases. A glass cover is installed on the upper surface of the bases, and the glass cover is located on the outside of the high-level enclosure and the main enclosure.

3. The preservative precise quantitative addition device according to claim 2, characterized in that: An outer groove is provided on one side of the glass cover, and an inspection door is hinged to the outer groove. An inner groove is provided on one side of the main body, and the inner groove is opposite to the outer groove and the position of the weighing sensor inside the weighing tank is opposite to the inner groove.

4. The preservative precise quantitative addition device according to claim 3, characterized in that: The upper end of the high-level box is provided with an end plate, and a cover plate is hinged to one side of the end plate. The positions of the end plate and the cover plate are opposite to the feed inlet of the high-level box.

5. The preservative precise quantitative addition device according to claim 4, characterized in that: The upper end of the main body is provided with an installation plate, and the upper end of the installation plate is provided with an air blowing valve and an air venting valve. The lower ends of the air blowing valve and the air venting valve extend through the installation plate into the weighing tank.

6. The preservative precise quantitative addition device according to claim 5, characterized in that: The upper end of the mounting plate is provided with an annular pipe and an air pump. One end of the air pump is provided with a connecting conduit, and one end of the connecting conduit is connected to the annular pipe. The inner wall of the weighing tank is provided with an air outlet component, which is connected to the annular pipe through a flexible hose.

7. The preservative precise quantitative addition device according to claim 6, characterized in that: The venting component includes a venting pipe located inside the weighing tank. The lower end of the venting pipe has an inclined surface with a venting hole. A fixing block is installed on one side of the venting pipe, and an industrial camera is installed on one side of the fixing block. A liquid level sensor is installed on the bottom surface of the fixing block. An electric push rod is installed at the upper end of the fixing block, and one end of the electric push rod is connected to a mounting plate. A flexible hose connects the venting pipe and the annular pipe.

8. The preservative precise quantitative addition device according to claim 7, characterized in that: The weighing tank is provided with a synchronization tube on its outer wall. Inside the synchronization tube are a pressure rod and a pressure cylinder. A magnetic block is provided at one end of the pressure rod, and a piston plate is provided at the other end of the pressure rod. The piston plate is located inside the pressure cylinder. A strong magnetic plate is embedded in the outer wall of the vent pipe. The strong magnetic plate and the magnetic block are attracted by magnetism.

9. The preservative precise quantitative addition device according to claim 8, characterized in that: An external discharge pipe is provided on the outer surface of the pressure cylinder. One end of the external discharge pipe extends into the weighing tank and is opposite to the discharge pipe opening. A pressure valve is provided inside the external discharge pipe. A one-way valve pipe is also provided on the outer surface of the pressure cylinder, and the one-way valve pipe is connected to the outside.

10. The preservative precise quantitative addition device according to claim 9, characterized in that: The central control unit includes a signal receiving module, which is connected to a real-time processing module. The real-time processing module is connected to a verification and inspection module. The signal receiving module is connected to an external batching pot weighing system, a liquid level sensor, and an industrial camera. The real-time processing module is connected to the feed valve, the discharge valve, and the air pump. The liquid level sensor collects the real-time data on the vent hole and the level of the preservative liquid. At the same time, the industrial camera monitors the vent hole's venting effect in real time and detects whether the preservative splashes.

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