Automatic defoaming agent adding device of soybean milk boiling unit

Abstract

The utility model relates to an automatic defoaming agent adding device for a soybean milk boiling unit, which is mounted on one side of a ladder stand of the soybean milk boiling unit and comprises a mounting support, a defoaming liquid barrel and a metering pump are respectively arranged on the mounting support, and the bottom of the defoaming liquid barrel is connected with a liquid inlet connecting pipe of the metering pump through a liquid outlet pipe. A liquid outlet valve and a filter are sequentially installed on the liquid outlet pipe in the flowing direction of the defoaming liquid, a liquid outlet connecting pipe of the metering pump is upward and connected with a liquid outlet pipeline extending to the position above the top of the soybean milk boiling unit, the end of the liquid outlet pipeline is connected with a liquid inlet connecting pipe of an electromagnetic valve, the liquid outlet connecting pipe of the electromagnetic valve extends into an inner cavity of the soybean milk boiling unit, and a nozzle is installed at the end of the liquid outlet connecting pipe. The defoaming device can be linked with a soybean milk boiling unit, so that the defoaming agent can be automatically injected into the soybean milk boiling unit during soybean milk boiling, and the problems of bubble overflow and inaccurate defoaming agent metering during soybean milk boiling are solved.

Description

Technical Field

[0001] This utility model relates to the field of tofu skin manufacturing technology, specifically to an automatic defoaming agent addition device in a boiling unit. Background Technology

[0002] In existing technology, the soy milk cooking unit for tofu skin and dried bean curd involves heating the soy milk to generate a large number of bubbles, requiring the addition of a defoamer in a specific ratio to prevent these bubbles from escaping outside the cooking tank. However, the current method of adding the defoamer involves manual addition, which can lead to delayed addition, bubble overflow, and difficulty in metering. Furthermore, delayed addition can cause scalding of operators due to overflowing bubbles. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an automatic defoamer dosing device for a pulp boiling unit. By solving the problems of bubble overflow and inaccurate metering during pulp boiling, it transforms manual operation into automatic control, improving operational convenience and enhancing safety.

[0004] This utility model is achieved through the following technical solution:

[0005] An automatic defoamer dosing device for a pulp boiling unit is provided. It is installed on one side of the ladder of the pulp boiling unit and includes a mounting bracket. A defoamer tank and a metering pump are respectively installed on the mounting bracket. The bottom of the defoamer tank is connected to the inlet pipe of the metering pump through an outlet pipe. An outlet valve and a filter are installed sequentially on the outlet pipe along the flow direction of the defoamer. The outlet pipe of the metering pump is upward and connected to an outlet pipe extending to the top of the pulp boiling unit. The end of the outlet pipe is connected to the inlet pipe of a solenoid valve. The outlet pipe of the solenoid valve extends into the inner cavity of the pulp boiling unit and a nozzle is installed at the end.

[0006] This solution uses an automatic liquid addition device on one side of the boiling unit to inject an appropriate amount of defoaming liquid into the grouting unit using a metering pump. The defoaming liquid is then sprayed by a rotating nozzle in the inner cavity of the boiling unit. This effectively solves the safety problem of scalding caused by overflowing bubbles during boiling. Compared with manual addition, this solution achieves automatic control and automatic addition, improving the safety of use.

[0007] Furthermore, the outlet pipes are installed between the grouting unit and the mounting bracket via pipe bracket I and pipe bracket II, respectively. Pipe bracket I is vertically fixed on the mounting bracket on one side of the metering pump, and pipe bracket II is horizontally fixed between the handrails at the top of the ladder.

[0008] The vertical part of the liquid outlet pipe is supported and fixed by pipe bracket I, and the horizontal part of the liquid outlet pipe is supported and fixed by pipe bracket II, which can ensure the stability of the liquid outlet pipe installation.

[0009] Furthermore, it also includes a PLC controller electrically connected to the air butterfly valve at the raw pulp inlet of the pulping unit, and the PLC controller is also electrically connected to the metering pump and the solenoid valve respectively.

[0010] By setting up a PLC controller, the air butterfly valve, solenoid valve, and metering pump can be coordinated and controlled. After the raw pulp is quantitatively added to the pulping unit, the air butterfly valve is closed in time. After the pulping set time is completed, the solenoid valve is opened and the metering pump is started to inject a quantitative amount of defoaming liquid into the pulping unit, so as to realize the automatic injection of defoaming liquid, improve the safety of use, realize the automatic control injection of defoaming liquid, and improve the convenience of use.

[0011] Furthermore, the outlet pipe of the solenoid valve extends from the top center of the cooking unit to directly above the surface of the raw slurry, and a sealing cap is rotatably fitted at its end. Several injection pipes that communicate with the outlet pipe of the solenoid valve and are used to connect the nozzles are installed circumferentially on the sealing cap. A fixed shaft is vertically connected to the center of the sealing cap inside the outlet pipe. An impeller is installed on the fixed shaft. A positioning rod perpendicular to the fixed shaft is fixed in the diameter direction of the outlet pipe section. The center of the positioning rod is rotatably connected to the end of the fixed shaft through a bearing.

[0012] The nozzle is installed on the sealing cover through the spray pipe. Under the high pressure of the metering pump, the defoaming liquid can flow at high speed through the outlet pipe of the solenoid valve to drive the impeller to rotate. The impeller drives the sealing cover to rotate, so that the spray pipe can rotate and spray, which improves the spraying efficiency and spraying range of the nozzle, increases the contact area with the bubbles on the surface of the boiling unit, and thus achieves rapid defoaming.

[0013] Furthermore, a fixed bearing is fitted onto each spray pipe, and fan blades are evenly spaced on the outer ring of the bearing.

[0014] The outer ring of the fixed bearing of the spray pipe is uniformly equipped with fan blades. When the sealing cover drives the spray pipe to rotate, the airflow generated pushes the fan blades to rotate. The rotation of the fan blades can then be used to react with the defoaming liquid sprayed from the nozzle, further increasing the diffusion range of the defoaming liquid. This allows the sprayed defoaming liquid to quickly cover the surface of the raw pulp in the cooking unit, thereby further improving the defoaming efficiency.

[0015] Furthermore, the outlet pipe located on pipe support I is connected above the defoaming liquid tank to a return branch pipe extending into the defoaming liquid tank, and a safety valve is installed on the return branch pipe.

[0016] The outlet pipe is connected to the defoaming tank via a return branch pipe. A safety valve is installed on the return branch pipe. When the solenoid valve fails or malfunctions, and the pressure in the outlet pipe exceeds the rated threshold of the safety valve, the safety valve opens, allowing the defoaming liquid in the outlet pipe to flow back to the defoaming liquid tank through the return pipe. This prevents the metering pump from being damaged due to increased pressure.

[0017] The beneficial effects of this utility model are:

[0018] This utility model's automatic liquid addition device can be linked with the air butterfly valve for raw pulp injection and the heating part of the pulping unit via a PLC controller. After the raw pulp injection is completed, the air butterfly valve is closed, and after the pulping time is over, the metering pump and solenoid valve are opened, replacing the manual addition method. It can automatically add defoaming liquid into the pulping unit, achieving precise addition and fast and safe addition of defoaming liquid. The added defoaming liquid is sprayed out through a rotating nozzle, which can increase the contact area between the defoaming liquid and the foaming raw pulp, thereby improving the defoaming efficiency, quickly achieving defoaming, solving the problem of bubble overflow after pulping, and avoiding the problem of easy burns when adding manually. The whole system achieves automatic control, improving the convenience and safety of use.

[0019] A return branch pipe is connected to the outlet pipe, which can be used in conjunction with a safety valve. In the event of a solenoid valve failure, the pressure threshold of the safety valve is used to allow the defoaming liquid to flow back through the return branch pipe, preventing the pipeline pressure from rising and damaging the metering pump, and extending the service life of the metering pump. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 for Figure 1 The front view.

[0022] Figure 3 for Figure 1 Enlarged view of the structure at point A in the middle.

[0023] Figure 4 for Figure 2 Enlarged view of the structure at point B in the middle.

[0024] Figure 5 for Figure 2 Enlarged view of the structure at point C.

[0025] Figure 6 for Figure 1 Enlarged view of the structure at point D.

[0026] Figure 7 This is a schematic diagram of the installation structure of the mounting bracket, defoaming liquid tank and metering pump in this utility model.

[0027] Figure 8 This is an enlarged view of the connection between the solenoid valve outlet pipe and the nozzle in this utility model.

[0028] As shown in the figure:

[0029] 1. Defoaming liquid tank; 2. Discharge valve; 3. Mounting bracket; 4. Discharge valve; 5. Discharge pipe; 6. Return port; 7. Filter; 8. Metering pump inlet pipe; 9. Metering pump outlet pipe; 10. Metering pump cover; 11. Metering pump; 12. Metering pump bracket; 13. Safety valve; 14. Pipe support I; 15. Discharge pipe; 16. Pipe support II; 17. Boiling tank; 18. Solenoid valve; 19. Solenoid valve outlet pipe; 20. Nozzle; 21. Raw pulp surface; 22. Raw pulp pipe; 23. T-junction; 24. Air butterfly valve; 25. Return branch pipe; 26. Ladder; 27. Sealing cover; 28. Spray pipe; 29. ​​Fixed shaft; 30. Impeller; 31. Positioning rod; 32. Fixed bearing; 33. Fan blade. Detailed Implementation

[0030] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0031] An automatic defoamer dosing device for a pulp boiling unit is installed on one side of the ladder 26 of the pulp boiling unit. It includes a mounting bracket 3, on which a defoamer tank 1 and a metering pump 11 are respectively mounted. In this embodiment, there are two defoamer tanks 1, which are connected in series through a discharge pipe 5. Each defoamer tank 1 is also equipped with a discharge valve 2 at the bottom for discharging the defoamer in the tank. Each defoamer tank 1 has a return port 6 at the top for connecting to a return branch pipe 25 to receive the returned defoamer. The bottom of the defoaming liquid tank 1 is connected to the inlet pipe 8 of the metering pump 11 via the outlet pipe 5. The outlet pipe 5 is sequentially equipped with an outlet valve 4 and a filter 7 along the flow direction of the defoaming liquid. The metering pump 11 is mounted on the mounting bracket 3 via the metering pump bracket 12. The metering pump 11 is covered with a metering pump cover 10. The outlet pipe 9 of the metering pump 11 is connected upward and connected to an outlet pipe 15 extending to the top of the cooking unit. The end of the outlet pipe 15 is connected to the inlet pipe of the solenoid valve 18. The outlet pipe 19 of the solenoid valve extends into the inner cavity of the cooking unit and a nozzle 20 is installed at the end.

[0032] The outlet pipe 15 is installed between the grouting unit and the mounting bracket 3 via pipe supports I14 and II16. Pipe support I14 is vertically fixed to the mounting bracket 3 on one side of the metering pump 11, and pipe support II16 is horizontally fixed between the handrails at the top of the ladder 26. The outlet pipe 15 located on pipe support I14 is connected to a return branch pipe 25 extending into the defoaming liquid tank 1 above the defoaming liquid tank 1. A safety valve 13 is installed on the return branch pipe 25.

[0033] To facilitate automated addition of defoaming solution, a PLC controller electrically connected to the air butterfly valve 24 at the raw pulp inlet of the pulping unit is also included. The PLC controller is also electrically connected to the metering pump 11 and the solenoid valve 18. In this embodiment, the PLC controller is existing technology and can be a Siemens S7-1200 model. By setting control logic, coordinated operation of various devices can be achieved.

[0034] The solenoid valve outlet pipe 19 extends from the top center of the cooking unit to directly above the raw slurry surface 21, and its end is rotatably fitted with a sealing cover 27. Several spray pipes 28, which communicate with the solenoid valve outlet pipe 19 and are used to connect the nozzles 20, are installed circumferentially on the sealing cover 27. A fixed shaft 29 is vertically connected to the center of the sealing cover 27 inside the outlet pipe 19. An impeller 30 is installed on the fixed shaft 29. A positioning rod 31, which is perpendicular to the fixed shaft 29, is fixed in the diameter direction of the outlet pipe 19. The center of the positioning rod 31 is rotatably connected to the end of the fixed shaft 29 through a bearing.

[0035] To improve the spray range and coverage, a fixed bearing 32 is fitted on each spray pipe 28, and fan blades 33 are evenly spaced on the outer ring of the bearing 32.

[0036] The working principle of this utility model:

[0037] Before boiling the soy milk, the operator pours the defoaming solution diluted according to the ratio into two defoaming solution tanks 1, opens the outlet valve 4, so that the defoaming solution tank 1 is connected to the metering pump 11 through the outlet pipe 5, and prepares for the addition of defoaming solution.

[0038] In the existing technology, when adding raw pulp to the pulp boiling unit, such as Figure 5 As shown, raw pulp enters the cooking tank 17 of the cooking unit through raw pulp pipe I22, pipe tee 23, air butterfly valve 24, and raw pulp pipe 25. After reaching the set metering, the PLC controller can control the air butterfly valve 24 to close, completing the addition of raw pulp. At the same time, it controls the heating mechanism to cook the raw pulp in the cooking tank 17. After reaching the set cooking time, the pulp in the cooking tank 17 begins to foam. At this time, the PLC controller of the automatic liquid addition device will start the metering pump 11 to work, and the defoaming liquid will be added. Under the action of metering pump 11, the liquid is sprayed out sequentially through outlet valve 4, outlet pipe 5 of defoaming liquid tank, filter 7, metering pump inlet pipe 8, metering pump outlet pipe 9, outlet pipe 15, solenoid valve 18, solenoid valve outlet pipe 19 and nozzle 20, and evenly covers the surface 21 of raw slurry in the inner cavity of the cooking unit. It reacts with the raw slurry to achieve defoaming. After the defoaming liquid reaches the set metering, the PLC controller controls the metering pump 11 to stop working and the solenoid valve 18 to close, thus completing the automatic defoaming liquid addition.

[0039] After being pressurized by metering pump 11, the defoaming liquid is pumped into the outlet pipe 15. When it passes through impeller 30, it drives impeller 30 to rotate sealing cover 27, which in turn drives the spray pipe 28 around sealing cover 27 to rotate, which in turn drives nozzle 20 to rotate and spray defoaming liquid. At the same time as sealing cover 27 rotates, fan blades 33 outside spray pipe 29 are passively rotated, which can blow away the defoaming liquid sprayed by nozzle 20 and expand its coverage area, so that the defoaming liquid can fully cover all parts of raw slurry surface 21, thereby improving defoaming efficiency.

[0040] In this embodiment, the automatic liquid addition device is linked with the pulp boiling unit system, thereby realizing automatic liquid addition control in the pulp boiling tank 17 during pulp boiling. After one addition of defoaming liquid, to prevent residual defoaming liquid in the defoaming liquid tank 1 from deteriorating during the next operation, the drain valve 2 at the bottom of the defoaming liquid tank 1 can be manually opened to drain the residual defoaming liquid, and the inner wall of the defoaming liquid tank 1 should be cleaned in time. After cleaning, the drain valve 2 at the bottom of the defoaming liquid tank 1 should be closed in time, completing the work of removing residual defoaming liquid and cleaning the defoaming liquid tank 1.

[0041] In certain special circumstances, when the solenoid valve 18 before the nozzle 20 fails to open, the pressure in the outlet pipe 15 increases when the metering pump 11 is working. When the pressure exceeds the set pressure of the safety valve 13 in the outlet pipe, the safety valve 13 opens, and the defoaming liquid flows back into the defoaming liquid tank 1 through the return branch pipe 25, thus avoiding damage to the metering pump 11 due to increased pressure and extending the service life of the metering pump 11.

[0042] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. An automatic defoamer dispensing device for a pulp boiling unit, installed on one side of the ladder in the pulp boiling unit, characterized in that: The system includes a mounting bracket, on which a defoaming liquid tank and a metering pump are mounted. The bottom of the defoaming liquid tank is connected to the inlet pipe of the metering pump via an outlet pipe. An outlet valve and a filter are sequentially installed on the outlet pipe along the flow direction of the defoaming liquid. The outlet pipe of the metering pump extends upward and is connected to an outlet pipe that extends to the top of the cooking unit. The end of the outlet pipe is connected to the inlet pipe of the solenoid valve. The outlet pipe of the solenoid valve extends into the inner cavity of the cooking unit and has a nozzle installed at its end.

2. The automatic defoamer dosing device for the boiling unit according to claim 1, characterized in that: The outlet pipes are installed between the grouting unit and the mounting bracket via pipe bracket I and pipe bracket II, respectively. Pipe bracket I is vertically fixed on the mounting bracket on one side of the metering pump, and pipe bracket II is horizontally fixed between the handrails at the top of the ladder.

3. The automatic defoamer dosing device for the boiling unit according to claim 1, characterized in that: It also includes a PLC controller electrically connected to the air butterfly valve at the raw pulp inlet of the pulping unit, and the PLC controller is also electrically connected to the metering pump and the solenoid valve respectively.

4. The automatic defoamer dosing device for the boiling unit according to claim 1, characterized in that: The outlet pipe of the solenoid valve extends from the top center of the cooking unit to directly above the surface of the raw slurry, and a sealing cap is rotatably fitted at its end. Several injection pipes that communicate with the outlet pipe of the solenoid valve and are used to connect the nozzles are installed circumferentially on the sealing cap. A fixed shaft is vertically connected to the center of the sealing cap inside the outlet pipe. An impeller is installed on the fixed shaft. A positioning rod perpendicular to the fixed shaft is fixed in the diameter direction of the outlet pipe section. The center of the positioning rod is rotatably connected to the end of the fixed shaft through a bearing.

5. The automatic defoamer dosing device for the boiling unit according to claim 4, characterized in that: Each jet pipe is fitted with a fixed bearing, and fan blades are installed at even intervals on the outer ring of the bearing.

6. The automatic defoamer dosing device for the boiling unit according to claim 1, characterized in that: The outlet pipe located on pipe support I is connected to a return branch pipe extending into the defoaming liquid tank above the defoaming liquid tank, and a safety valve is installed on the return branch pipe.

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