Tobacco feed liquid spraying device

Abstract

The utility model provides a tobacco feed liquid spraying device which comprises a liquid preparing part and a liquid spraying part, the liquid preparing part comprises a liquid preparing pipeline and a grinding body, the grinding body is arranged on the liquid preparing pipeline, the liquid spraying part comprises a spraying pipeline and a pressure tank, the pressure tank is arranged on the spraying pipeline, the spraying pipeline is communicated with the liquid preparing pipeline, the pressure tank is communicated with a gas source, and the gas source is communicated with the spraying pipeline. The liquid preparation part is arranged, and the grinding body is arranged on the liquid preparation pipeline, so that tobacco liquid in the liquid preparation pipeline can be fully emulsified and dispersed, and a good homogenizing effect is ensured. The liquid spraying part is arranged, and the pressure tank is arranged on the spraying pipeline, so that the tobacco feed liquid can be stored. The pressure tank is communicated with the gas source, so that the tobacco feed liquid can be driven to be sprayed out through gas such as compressed air, the spraying of the tobacco feed liquid is more stable and uniform, the homogeneity of a sprayed tobacco sheet finished product is improved, the good spraying quality is ensured, and the stability of smoke release is improved.

Description

Technical Field

[0001] This application belongs to the technical field of spraying equipment, and particularly relates to a tobacco liquid spraying device. Background Art

[0002] Tobacco sheet is a reconstituted sheet mainly made of tobacco substances through formula combination and processing. At present, the main preparation methods for processing tobacco sheets are the papermaking method, the thick slurry method, and the roll pressing method. Among them, the tobacco sheet prepared by the papermaking method has the advantages of low density, good mechanical properties, and low tar release rate, and is widely used in the blending of traditional cigarette sticks and the core materials of heated cigarettes.

[0003] When preparing tobacco sheets by the papermaking method, a tobacco liquid spraying device is usually used to spray tobacco liquid. The existing tobacco liquid spraying device has a simple structure, a relatively single function design, and poor stability of spraying quality. Utility Model Content

[0004] Therefore, the technical problem to be solved by this application is to provide a tobacco liquid spraying device that can improve the stability of tobacco liquid spraying quality.

[0005] To solve the above problems, this application provides a tobacco liquid spraying device, including a liquid preparation part and a liquid spraying part. The liquid preparation part includes a liquid preparation pipeline and a grinding body, and the grinding body is arranged on the liquid preparation pipeline. The liquid spraying part includes a spraying pipeline and a pressure tank, and the pressure tank is arranged on the spraying pipeline. The spraying pipeline is connected to the liquid preparation pipeline, and the pressure tank is connected to a gas source.

[0006] Optionally, the liquid preparation part further includes a stirring tank, a first pump body, a flow switch, a filter, and a buffer tank. The stirring tank, the first pump body, the flow switch, the grinding body, the filter, and the buffer tank are arranged in sequence along the flow direction of the liquid preparation pipeline. The liquid preparation part further includes a circulation pipeline, the inlet end of the circulation pipeline is connected to the discharge port of the grinding body, and the outlet end of the circulation pipeline is connected to the stirring tank. The tobacco liquid spraying device includes a controller, and the flow switch and the grinding body are respectively connected to the controller. The flow switch is used to obtain the flow information in the liquid preparation pipeline and send an alarm signal when the flow information is lower than a preset flow rate. The controller controls the grinding body to stop based on the alarm signal.

[0007] Optionally, the pressure tank includes a tank body, an inlet port is arranged at the upper part of the tank body, an outlet port is arranged at the lower part of the tank body, an air inlet and an exhaust port are arranged at the upper part of the tank body, and the air inlet is connected to the gas source.

[0008] Optionally, a first liquid level gauge and a second liquid level gauge are provided on the tank body. The first liquid level gauge is arranged at the upper part of the tank body, and the second liquid level gauge is arranged at the lower part of the tank body. The liquid spraying part further includes a second pump body, which is arranged on the upstream side of the pressure tank along the flow direction of the spraying pipeline. The tobacco liquid spraying device includes a controller, and the first liquid level gauge, the second liquid level gauge and the second pump body are respectively connected to the controller.

[0009] Optionally, the pressure received by the liquid when it enters the pressure tank is the replenishing pressure. An overflow valve is provided on the tank body, and the opening pressure of the overflow valve is greater than the replenishing pressure.

[0010] Optionally, the tobacco liquid spraying device further includes a return pipeline. The inlet end of the return pipeline is connected to the spraying pipeline and is located on the upstream side of the pressure tank along the flow direction. The outlet end of the return pipeline is connected to the buffer tank.

[0011] Optionally, a first regulating valve is provided on the return pipeline, and a pressure sensor is provided on the pressure tank. The tobacco liquid spraying device includes a controller, and the first regulating valve and the pressure sensor are respectively connected to the controller. The controller controls the first regulating valve to adjust the opening based on the pressure value obtained by the pressure sensor; the pressure received by the liquid when it enters the pressure tank is the replenishing pressure, and the replenishing pressure is greater than the gas pressure of the gas source entering the pressure tank.

[0012] Optionally, the liquid spraying part further includes a first check valve, a flow meter, a first shut-off valve, a spray gun and a second shut-off valve. The second pump body, the first check valve, the pressure tank, the flow meter, the first shut-off valve, the spray gun and the second shut-off valve are arranged in sequence along the flow direction of the spraying pipeline.

[0013] Optionally, the number of the spray guns is multiple, and the multiple spray guns are arranged in multiple rows; the second pump body is a variable frequency pump.

[0014] Optionally, the pressure tank is connected to the gas source through an air pipeline. A second regulating valve and a second check valve are provided on the air pipeline, and the second regulating valve and the second check valve are arranged in sequence along the flow direction of the compressed air in the air pipeline; the controller is connected to the second regulating valve, and the controller controls the opening of the second regulating valve based on the flow information in the spraying pipeline obtained by the flow meter.

[0015] Beneficial effects

[0016] In an embodiment of the present utility model, a tobacco liquid spraying device is provided. By arranging a liquid preparation part and a grinding body on the liquid preparation pipeline, the tobacco liquid in the liquid preparation pipeline can be fully emulsified and dispersed, ensuring a good homogenization effect. By arranging a liquid spraying part and a pressure tank on the spraying pipeline, the storage of tobacco liquid can be realized. By connecting the pressure tank with a gas source, the tobacco liquid can be driven to spray out through a gas, such as compressed air, making the spraying of the tobacco liquid more stable and uniform, improving the homogeneity of the tobacco sheet finished product after spraying, ensuring good spraying quality, and enhancing the stability of smoke release. Description of the Drawings

[0017] Figure 1 It is a diagram of the system principle of the tobacco liquid spraying device according to an embodiment of the present application;

[0018] Figure 2 It is the front view of the pressure tank according to an embodiment of the present application;

[0019] Figure 3 It is the top view of the pressure tank according to an embodiment of the present application.

[0020] The reference numerals are represented as:

[0021] 1. Stirring tank; 2. First pump body; 3. Flow switch; 4. Grinding body; 5. Filter; 6. Buffer tank; 7. Second pump body; 8. First regulating valve; 9. First check valve; 10. Pressure tank; 11. Pressure sensor; 12. Second regulating valve; 13. Second check valve; 14. Flowmeter; 15. First shut-off valve; 16. Spray gun; 17. Second shut-off valve; 18. Gas source; 19. Liquid inlet; 20. Liquid outlet; 21. Air inlet; 22. Exhaust port; 23. First liquid level gauge; 24. Second liquid level gauge; 25. Pressure gauge. Detailed Embodiments

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0023] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0024] In this application, unless otherwise clearly stipulated and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] The preferred embodiments of the present utility model will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model and are not used to limit the present utility model.

[0026] See in conjunction Figures 1 to 3 As shown, according to an embodiment of the present application, a tobacco liquid spraying device is provided, which includes a liquid preparation part and a liquid spraying part. The liquid preparation part includes a liquid preparation pipeline and a grinding body 4, and the grinding body 4 is arranged on the liquid preparation pipeline. The liquid spraying part includes a spraying pipeline and a pressure tank 10, and the pressure tank 10 is arranged on the spraying pipeline. The spraying pipeline is communicated with the liquid preparation pipeline, and the pressure tank 10 is communicated with a gas source 18.

[0027] By providing the liquid preparation part and arranging the grinding body 4 on the liquid preparation pipeline, the tobacco liquid in the liquid preparation pipeline can be fully emulsified and dispersed, ensuring a good homogenization effect. By providing the liquid spraying part and arranging the pressure tank 10 on the spraying pipeline, the storage of the tobacco liquid can be realized. By communicating the pressure tank 10 with the gas source 18, the tobacco liquid can be driven to spray out by gas, such as compressed air, making the spraying of the tobacco liquid more stable and uniform, improving the homogeneity of the tobacco sheet finished product after spraying, ensuring good spraying quality, and enhancing the stability of the smoke release.

[0028] Among them, the liquid preparation part is located on the upstream side of the liquid spraying part, and the tobacco liquid in the liquid preparation part can flow into the liquid spraying part and be sprayed out through the liquid spraying part.

[0029] Among them, the spraying pipeline is communicated with the liquid preparation pipeline, so that the tobacco liquid processed by the grinding body 4 can enter the pressure tank 10.

[0030] Among them, the air source 18 can be provided by the air source device within the tobacco liquid spraying device, such as the air compressor of the tobacco liquid spraying device, or it can be an external air source 18.

[0031] Specifically, the air source 18 can be compressed air.

[0032] The liquid preparation section further includes a stirring tank 1, a first pump body 2, a flow switch 3, a filter 5, and a buffer tank 6. The stirring tank 1, the first pump body 2, the flow switch 3, the grinding body 4, the filter 5, and the buffer tank 6 are arranged in sequence along the flow direction of the liquid preparation pipeline.

[0033] Among them, the stirring tank 1 is used for stirring the tobacco liquid, and the first pump body 2 is used to drive the tobacco liquid to flow in the liquid preparation pipeline. The filter 5 is used to filter the tobacco liquid. The filtered tobacco liquid flows into the buffer tank 6.

[0034] Among them, after the tobacco liquid flows through the stirring tank 1, the first pump body 2, the flow switch 3, the filter 5, and the buffer tank 6 in sequence, it enters the liquid spraying section.

[0035] The liquid preparation section further includes a circulation pipeline. The inlet end of the circulation pipeline is connected to the discharge port of the grinding body 4, and the outlet end of the circulation pipeline is connected to the stirring tank 1. By setting the circulation pipeline, unqualified materials can be re-transported to the stirring tank 1, so that the unqualified materials are reprocessed by the grinding body 4 until they meet the requirements.

[0036] Among them, devices such as a classifier or a sieve can be set at the discharge port of the grinding body 4 to screen the discharged materials. Materials with a particle size that does not meet the requirements are transported back to the stirring tank 1, and materials that meet the requirements enter the spraying pipeline. Screening by devices such as a classifier or a sieve is a conventional technical means in the art, and the specific screening method will not be elaborated here. It can be understood that not all the materials discharged from the discharge port of the grinding body 4 enter the circulation pipeline. Instead, the circulation pipeline is a branch pipeline, and the materials that need to be circulated enter the circulation pipeline.

[0037] The tobacco liquid spraying device includes a controller. The flow switch 3 and the grinding body 4 are respectively connected to the controller. The flow switch 3 is used to obtain the flow information in the liquid preparation pipeline and send an alarm signal when the flow information is lower than the preset flow rate. The controller controls the grinding body 4 to stop based on the alarm signal, and can control the grinding body 4 according to the flow information. When the flow rate is low, the grinding body 4 can be automatically stopped to prevent the wear of the rotor and stator of the grinding body 4 due to no-load operation.

[0038] Among them, the preset flow rate can be flexibly set according to actual needs.

[0039] Specifically, the preset flow rate can be set on the flow switch 3 or can be set on the controller.

[0040] The pressure tank 10 includes a tank body. An inlet 19 is provided at the upper part of the tank body, an outlet 20 is provided at the lower part of the tank body, an air inlet 21 and an exhaust port 22 are provided at the upper part of the tank body, and the air inlet 21 is communicated with a gas source 18.

[0041] Among them, the inlet 19 is provided on the outer peripheral wall of the upper part of the tank body.

[0042] Among them, the outlet 20 is provided on the bottom surface of the tank body.

[0043] Among them, the air inlet 21 and the exhaust port 22 are provided on the top surface of the tank body.

[0044] Specifically, the air inlet 21 is provided at the central position of the top surface of the tank body, and the exhaust port 22 is eccentrically provided on the top surface of the tank body.

[0045] Among them, the air inlet 21 is communicated with the gas source 18. When the tobacco liquid spraying device is working, the exhaust port 22 is in a closed state. A pressure valve can be provided on the exhaust port 22. When the air pressure in the tank is greater than the opening pressure of the pressure valve, the pressure valve opens to achieve exhaust, ensuring that the air pressure in the tank is within a reasonable range.

[0046] A first liquid level gauge 23 and a second liquid level gauge 24 are provided on the tank body. The first liquid level gauge 23 is provided at the upper part of the tank body, and the second liquid level gauge 24 is provided at the lower part of the tank body. The liquid spraying part further includes a second pump body 7. The second pump body 7 is provided on the upstream side of the pressure tank 10 along the flow direction of the spraying pipeline. The tobacco liquid spraying device includes a controller. The first liquid level gauge 23, the second liquid level gauge 24 and the second pump body 7 are respectively connected to the controller.

[0047] Among them, the first liquid level gauge 23 is provided on the outer peripheral wall of the upper part of the tank body. When the first liquid level gauge 23 detects the liquid level, it means that the liquid level in the tank has reached the high point, and it is necessary to stop delivering the tobacco liquid to the tank.

[0048] Among them, the second liquid level gauge 24 is provided on the outer peripheral wall of the lower part of the tank body. When the second liquid level gauge 24 cannot detect the liquid level, it means that the liquid level in the tank is low, and it is necessary to deliver the tobacco liquid to the tank.

[0049] Among them, when the first liquid level gauge 23 detects the liquid level, it sends a signal to the controller, and the controller controls the second pump body 7 to stop rotating, thereby stopping injecting the tobacco liquid into the pressure tank 10.

[0050] Among them, the second pump body 7 can be a variable frequency pump.

[0051] Among them, when the second liquid level gauge 24 cannot detect the liquid level, it sends a signal to the controller, and the controller controls the second pump body 7 to increase the rotation speed and increase the amount of tobacco liquid injected into the pressure tank 10.

[0052] The pressure received by the material liquid when entering the pressure tank 10 is the replenishing pressure. An overflow valve is provided on the tank body, and the opening pressure of the overflow valve is greater than the replenishing pressure to prevent the tobacco material liquid from overflowing due to the opening of the overflow valve during normal replenishment.

[0053] Among them, the overflow valve is arranged on the outer peripheral wall of the upper part of the tank body.

[0054] Among them, the opening pressure of the overflow valve is slightly greater than the replenishing pressure.

[0055] The tobacco material liquid spraying device further includes a return pipeline. The inlet end of the return pipeline is connected to the spraying pipeline and is located on the upstream side of the pressure tank 10 along the flow direction. The outlet end of the return pipeline is connected to the buffer tank 6.

[0056] Among them, the tobacco material liquid can flow back into the buffer tank 6 via the return pipeline.

[0057] A first regulating valve 8 is arranged on the return pipeline, and a pressure sensor 11 is arranged on the pressure tank 10. The first regulating valve 8 and the pressure sensor 11 are respectively connected to the controller, and the controller controls the first regulating valve 8 to adjust the opening based on the pressure value obtained by the pressure sensor 11.

[0058] By arranging the first regulating valve 8 and the pressure sensor 11 and connecting the first regulating valve 8 and the pressure sensor 11 to the controller respectively, the controller can control the first regulating valve 8 to adjust the opening according to the pressure value of the pressure tank 10 obtained by the pressure sensor 11, thereby controlling the return flow rate of the tobacco material liquid in the return pipeline and the replenishing pressure.

[0059] Among them, the first regulating valve 8 can be an electric valve, so that the controller can adjust the opening of the first regulating valve 8.

[0060] Among them, the pressure value obtained by the pressure sensor 11 is positively correlated with the opening of the first regulating valve 8.

[0061] Specifically, the greater the pressure value obtained by the pressure sensor 11, the greater the opening of the first regulating valve 8 controlled by the controller, so that more tobacco material liquid flows back into the buffer tank 6. The smaller the pressure value obtained by the pressure sensor 11, the smaller the opening of the first regulating valve 8 controlled by the controller, so that less tobacco material liquid flows back into the buffer tank 6.

[0062] More specifically, by controlling the opening of the first regulating valve 8, the pressure received by the material liquid when entering the pressure tank 10 is the replenishing pressure, and the replenishing pressure is greater than the gas pressure of the gas source 18 entering the pressure tank 10. The replenishing amount is greater than the consumption amount.

[0063] The liquid spraying part further includes a first check valve 9, a flow meter 14, a first shut-off valve 15, a spray gun 16 and a second shut-off valve 17. The second pump body 7, the first check valve 9, the pressure tank 10, the flow meter 14, the first shut-off valve 15, the spray gun 16 and the second shut-off valve 17 are arranged in sequence along the flow direction of the spraying pipeline.

[0064] Among them, the first check valve 9 is used to prevent the tobacco liquid from flowing back. The flow meter 14 is used to obtain the flow rate of the tobacco liquid in the spraying pipeline. The first shut-off valve 15 and the second shut-off valve 17 are used to close or open the spraying pipeline. The spray gun 16 is used to spray the tobacco liquid.

[0065] Specifically, the flow meter 14 is used to be connected to the controller, and then send the obtained flow rate to the controller.

[0066] Among them, the tobacco liquid in the spraying pipeline flows through the second pump body 7, the first check valve 9, the pressure tank 10, the flow meter 14, the first shut-off valve 15, the spray gun 16 and the second shut-off valve 17 in sequence and then is sprayed onto the thin sheet base.

[0067] The number of the spray guns 16 is multiple, and the multiple spray guns 16 are arranged in multiple rows, ensuring a good spraying effect.

[0068] The pressure tank 10 is connected to the air source 18 through an air pipeline. A second regulating valve 12 and a second check valve 13 are arranged on the air pipeline. The second regulating valve 12 and the second check valve 13 are arranged in sequence along the flow direction of the compressed air in the air pipeline. The controller is connected to the second regulating valve 12, and the controller controls the opening degree of the second regulating valve 12 based on the flow rate information of the spraying pipeline obtained by the flow meter 14.

[0069] By arranging the second regulating valve 12 on the air pipeline, the liquid delivery pressure can be controlled, the stable supply of the sprayed liquid flow rate can be realized, and the spraying quantity can be effectively controlled. By arranging the second check valve 13, the backflow of the compressed air can be avoided.

[0070] Among them, the second regulating valve 12 is connected to the controller, and then the opening degree of the second regulating valve 12 is controlled through the controller.

[0071] Among them, the controller controls the opening degree of the second regulating valve 12 according to the flow rate information obtained by the flow meter 14 on the spraying pipeline.

[0072] Specifically, the target flow rate can be set on the second regulating valve 12 or the controller. The controller obtains the actual flow rate in the spraying pipeline through the flow meter 14, compares the actual flow rate with the target flow rate, and controls the opening degree of the second regulating valve 12 according to the comparison result. When the actual flow rate is greater than the target flow rate, the controller controls the second regulating valve 12 to reduce the opening degree; when the actual flow rate is less than the target flow rate, the controller controls the second regulating valve 12 to increase the opening degree, so as to improve the uniformity of the functional flakes and accurately control the spraying amount.

[0073] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above advantageous methods can be freely combined and superimposed.

[0074] The above are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A tobacco liquor spraying device, characterized in that, It includes a liquid preparation part and a liquid spraying part. The liquid preparation part includes a liquid preparation pipeline and a grinding body (4). The grinding body (4) is arranged on the liquid preparation pipeline. The liquid spraying part includes a spraying pipeline and a pressure tank (10). The pressure tank (10) is arranged on the spraying pipeline. The spraying pipeline is communicated with the liquid preparation pipeline, and the pressure tank (10) is communicated with a gas source (18).

2. The tobacco liquid spraying device according to claim 1, wherein The liquid preparation part further includes a stirring tank (1), a first pump body (2), a flow switch (3), a filter (5) and a buffer tank (6). The stirring tank (1), the first pump body (2), the flow switch (3), the grinding body (4), the filter (5) and the buffer tank (6) are arranged in sequence along the flow direction of the liquid preparation pipeline; The liquid preparation part further includes a circulation pipeline. The inlet end of the circulation pipeline is communicated with the discharge port of the grinding body (4), and the outlet end of the circulation pipeline is communicated with the stirring tank (1); The tobacco liquid spraying device includes a controller. The flow switch (3) and the grinding body (4) are respectively connected to the controller. The flow switch (3) is used to obtain the flow information in the liquid preparation pipeline and send an alarm signal when the flow information is lower than a preset flow rate. The controller controls the grinding body (4) to stop based on the alarm signal.

3. The tobacco liquid spraying device according to claim 1, characterized in that, The pressure tank (10) includes a tank body. The upper part of the tank body is provided with a liquid inlet (19), the lower part of the tank body is provided with a liquid outlet (20), the upper part of the tank body is provided with an air inlet (21) and an exhaust port (22), and the air inlet (21) is communicated with the gas source (18).

4. The tobacco liquid spraying device according to claim 3, characterized in that A first liquid level gauge (23) and a second liquid level gauge (24) are arranged on the tank body. The first liquid level gauge (23) is arranged at the upper part of the tank body, and the second liquid level gauge (24) is arranged at the lower part of the tank body. The liquid spraying part further includes a second pump body (7). The second pump body (7) is arranged on the upstream side of the pressure tank (10) along the flow direction of the spraying pipeline. The tobacco liquid spraying device includes a controller. The first liquid level gauge (23), the second liquid level gauge (24) and the second pump body (7) are respectively connected to the controller.

5. The tobacco liquid spraying device according to claim 3, characterized in that The pressure when the liquid enters the pressure tank (10) is the liquid replenishing pressure. An overflow valve is arranged on the tank body, and the opening pressure of the overflow valve is greater than the liquid replenishing pressure.

6. The tobacco liquid spraying device according to claim 2, characterized in that, The tobacco liquid spraying device further includes a return pipeline. The inlet end of the return pipeline is communicated with the spraying pipeline and is located on the upstream side of the pressure tank (10) along the flow direction. The outlet end of the return pipeline is communicated with the buffer tank (6).

7. The tobacco liquid spraying device according to claim 6, wherein A first regulating valve (8) is arranged on the return pipeline, and a pressure sensor (11) is arranged on the pressure tank (10). The tobacco liquid spraying device includes a controller. The first regulating valve (8) and the pressure sensor (11) are respectively connected to the controller. The controller controls the first regulating valve (8) to adjust the opening based on the pressure value obtained by the pressure sensor (11); When the liquid material enters the pressure tank (10), the pressure it receives is the liquid replenishment pressure, and the liquid replenishment pressure is greater than the gas pressure of the gas source (18) entering the pressure tank (10).

8. The tobacco liquid spraying device according to claim 4, wherein, The liquid spraying part further includes a first check valve (9), a flow meter (14), a first shut-off valve (15), a spray gun (16) and a second shut-off valve (17), and the second pump body (7), the first check valve (9), the pressure tank (10), the flow meter (14), the first shut-off valve (15), the spray gun (16) and the second shut-off valve (17) are arranged in sequence along the flow direction of the spraying pipeline.

9. The tobacco liquor spraying device according to claim 8, wherein, The number of the spray guns (16) is multiple, and the multiple spray guns (16) are arranged in multiple rows; The second pump body (7) is a variable frequency pump.

10. The tobacco liquid spraying device according to claim 9, wherein, The pressure tank (10) is connected to the gas source (18) through an air pipeline, and a second regulating valve (12) and a second check valve (13) are arranged on the air pipeline, and the second regulating valve (12) and the second check valve (13) are arranged in sequence along the flow direction of the compressed air in the air pipeline; The controller is connected to the second regulating valve (12), and the controller controls the opening degree of the second regulating valve (12) based on the flow information in the spraying pipeline obtained by the flow meter (14).

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