Feeding device based on pressure regulation and control in cigarette production

Abstract

The utility model discloses a feeding device based on pressure regulation and control in cigarette production, and relates to the technical field of cigarette production, the feeding device is provided with two injection channels, the front ends and the tail ends of the injection channels are respectively communicated with a compressed air source and a double-medium nozzle as well as a steam source and the other double-medium nozzle, and injection control valves are arranged in the injection channels; the front end of the feeding channel is communicated with the material tank, a branch structure with two branches is formed at the tail end of the feeding channel, feeding control valves are arranged on the two branches, and the tail end of the feeding channel is communicated with the two double-medium nozzles respectively. The feeding device is provided with the two independent injection channels which are respectively provided with the double-medium nozzles, and the injection mode of the feeding device is that the feeding control valve and the injection control valve control communication or cut-off adjustment switching between the charging bucket and the compressed air source and the double-medium nozzles or between the charging bucket and the steam source and the double-medium nozzles. Condensed water damage generated in a compressed air system due to communication of compressed air and steam caused by valve leakage in the injection mode switching process is avoided, and stable work of the feeding device is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of cigarette production technology, specifically to a feeding device for feeding tobacco leaves through injection atomization. Background Technology

[0002] Adding feed is one of the most important steps in the cigarette manufacturing process, which involves injecting a liquid feed into the tobacco leaves. Feeding methods are categorized into low-temperature feeding and high-temperature feeding, depending on the process requirements. Low-temperature feeding typically uses compressed air for feed atomization, while high-temperature feeding usually uses steam.

[0003] In existing technologies, the same dual-media nozzle device is used for both low-temperature and high-temperature feeding. Switching between different feed liquid injection media requires manual valve adjustment. During the switching process, leakage can easily lead to cross-contamination between compressed air and steam, causing damage to the compressed air system due to internal condensation. Furthermore, depending on the formulation requirements, there are significant differences in the amount of tobacco leaves and feed liquid in different products, necessitating different feed liquid flow rates. However, existing technologies maintain a relatively constant injection pressure, making it difficult to consistently ensure good atomization of the feed liquid when there are significant differences in feed flow rates. Utility Model Content

[0004] This invention aims to overcome the shortcomings of the existing technology by providing a pressure-controlled feeding device for cigarette production.

[0005] The present invention adopts the following technical solution to solve the technical problem: a feeding device based on pressure regulation in cigarette production, comprising a feeding channel for providing feeding raw materials, an ejection channel for providing ejection medium, and a dual-medium nozzle for spraying liquid. The dual-medium nozzle is connected to the end of the feeding channel and the ejection channel arranged in parallel. Two ejection channels are provided, and one dual-medium nozzle is connected to the end of each of the two ejection channels. An ejection control valve is provided in the ejection channel to control the connection or disconnection between the ejection channel and the corresponding dual-medium nozzle.

[0006] One of the two ejector channels is used as a compressed air ejector channel, with its front end connected to a compressed air source, and the other is used as a steam ejector channel, with its front end connected to a steam source.

[0007] The front end of the feeding channel is connected to the material tank for storing the raw materials, and the end forms a branch structure with two branches. Each of the two branches is equipped with a feeding control valve, and the ends of the two branches are respectively connected to the two dual-medium nozzles.

[0008] Furthermore, the feeding channel also includes a metering pump and a throttle valve;

[0009] The metering pump is equipped with the throttle valve in parallel, with its front end connected to the material tank and its rear end connected to the branch structure; the raw material in the material tank is fed to the dual-media nozzle through the feeding channel under the action of the metering pump.

[0010] Furthermore, this also includes flow meters;

[0011] The flow meter is installed on the feeding channel between the material tank and the branch structure.

[0012] Furthermore, the ejector channel also includes a shut-off valve, a pressure reducing valve, and a proportional regulating valve;

[0013] The shut-off valve, the pressure reducing valve, the ejector control valve, and the proportional regulating valve are sequentially connected between the compressed air source and the dual-medium nozzle or the steam source and the dual-medium nozzle.

[0014] The branch circuit also includes a pressure transmitter between the feed control valve and the dual-medium nozzle, and the pressure transmitter is connected to the proportional regulating valve in the ejector channel connected to the same dual-medium nozzle.

[0015] Furthermore, a filter is also provided in the compressed air ejector channel, and the filter is connected between the shut-off valve and the pressure reducing valve.

[0016] Furthermore, a pressure gauge is also provided in the compressed air ejector channel, and the pressure gauge is connected between the pressure reducing valve and the ejector control valve.

[0017] Furthermore, the ejector control valve is a solenoid valve.

[0018] Furthermore, the proportional control valve is a current-type proportional control valve.

[0019] Furthermore, the pressure reducing valve in the compressed air ejector channel is a gas pressure reducing valve, and the pressure reducing valve in the steam ejector channel is a steam pressure reducing valve.

[0020] Furthermore, the feed control valve is a solenoid valve.

[0021] This utility model provides a pressure-controlled feeding device for cigarette production, which has the following beneficial effects:

[0022] 1. This utility model is equipped with two independent ejection channels and a dual-medium nozzle. The ejection mode of the feeding device is controlled by the feeding control valve and the ejection control valve to switch between the material tank and the compressed air source and the dual-medium nozzle or the material tank and the steam source and the dual-medium nozzle. This avoids valve leakage during the ejection mode switching process, which could cause the compressed air and steam to cross-contaminate and cause damage to the compressed air system due to condensation. This ensures the stable operation of the feeding device.

[0023] 2. In this utility model, a pressure transmitter and a proportional regulating valve are respectively installed in the feeding channel and the ejector channel. The proportional regulating valve adjusts the pressure of the compressed air or steam supplied to the dual-medium nozzle by the ejector channel according to the pressure of the material supplied from the feeding channel to the dual-medium nozzle fed by the pressure transmitter, so that the ejector pressure always matches the feeding pressure to ensure good atomization spray effect.

[0024] 3. This utility model has a simple structure, is easy to use, and has good practicality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0027] In the picture:

[0028] 1. Feeding channel; 1-1. Metering pump; 1-2. Throttling valve; 1-3. Flow meter; 1-4. Feeding control valve; 1-5. Pressure transmitter; 2. Ejector channel; 2-1. Shut-off valve; 2-2. Pressure reducing valve; 2-3. Ejector control valve; 2-4. Proportional regulating valve; 2-5. Filter; 2-6. Pressure gauge; 3. Dual-media nozzle; 4. Material tank;

[0029] 1-4a, Compressed air supply valve; 1-5a, Compressed air transmitter; 2-1a, Compressed air shut-off valve; 2-2a, Compressed air pressure reducing valve; 2-3a, Compressed air control valve; 2-4a, Compressed air regulating valve; 3a, Compressed air nozzle.

[0030] 1-4b, Steam supply valve; 1-5b, Steam transmitter; 2-1b, Steam shut-off valve; 2-2b, Steam pressure reducing valve; 2-3b, Steam control valve; 2-4b, Steam regulating valve; 3b, Steam nozzle. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] A pressure-controlled feeding device for cigarette production, such as... Figure 1As shown, its structural relationship is as follows: it includes a feeding channel 1 for providing raw materials, an ejector channel 2 for providing ejector medium, and a dual-medium nozzle 3 for spraying liquid. The dual-medium nozzle 3 is connected to the end of the feeding channel 1 and the ejector channel 2 which are arranged in parallel. There are two ejector channels 2, and a dual-medium nozzle 3 is connected to the end of each of the two ejector channels 2. An ejector control valve 2-3 is provided in the ejector channel 2 to control the connection or disconnection between the ejector channel 2 and the corresponding dual-medium nozzle 3.

[0033] Either of the two ejector channels 2 is used as a compressed air ejector channel, with its front end connected to a compressed air source, and the other is used as a steam ejector channel, with its front end connected to a steam source.

[0034] The front end of the feeding channel 1 is connected to the material tank 4 for storing the raw materials, and the end forms a branch structure with two branches. Each branch is equipped with a feeding control valve 1-4, and the ends of the two branches are respectively connected to two dual-medium nozzles 3.

[0035] Preferably, the feeding channel 1 also includes a metering pump 1-1 and a throttle valve 1-2;

[0036] Metering pump 1-1 is connected in parallel with throttle valve 1-2, whose front end is connected to material tank 4 and whose rear end is connected to branch structure; the raw material in material tank 4 is fed to dual medium nozzle 3 through feeding channel 1 under the action of metering pump 1-1.

[0037] After the metering pump 1-1 is equipped with the throttle valve 1-2, the overall output flow of the parallel structure will automatically adjust within a certain range according to the load change, so as to improve the matching of injection pressure and flow to a certain extent, thereby improving the atomization effect of the liquid.

[0038] Preferably, it also includes flow meters 1-3;

[0039] Flow meters 1-3 are installed on the feeding channel 1 to connect the material tank 4 and the branch structure.

[0040] After the metering pump 1-1 is equipped with the throttle valve 1-2, the overall output flow of the parallel structure is automatically adjusted within a certain range according to the load change. The flow meter 1-3 is used to measure the actual output flow of the parallel structure.

[0041] Preferably, the ejector channel 2 further includes a shut-off valve 2-1, a pressure reducing valve 2-2, and a proportional regulating valve 2-4;

[0042] The shut-off valve 2-1, pressure reducing valve 2-2, ejector control valve 2-3 and proportional regulating valve 2-4 are sequentially connected between the compressed air source and the dual-medium nozzle 3 or the steam source and the dual-medium nozzle 3.

[0043] In the branch circuit, a pressure transmitter 1-5 is also provided between the feed control valve 1-4 and the dual-medium nozzle 3. The pressure transmitter 1-5 is connected to the proportional regulating valve 2-4 provided in the ejector channel 2 connected to the same dual-medium nozzle 3.

[0044] Preferably, the compressed air ejector channel is also equipped with a filter 2-5, which is connected between the shut-off valve 2-1 and the pressure reducing valve 2-2.

[0045] Preferably, the compressed air ejector channel is also equipped with a pressure gauge 2-6, which is connected between the pressure reducing valve 2-2 and the ejector control valve 2-3.

[0046] Compared to the steam pressure provided by the steam source, the compressed air pressure provided by the compressed air source varies more. Therefore, a pressure gauge 2-6 is added. In actual use, the pressure reducing valve 2-2 can be adjusted accordingly by the reading of the pressure gauge 2-6 to keep the compressed air pressure after pressure reduction by the pressure reducing valve 2-2 within a suitable range, so as to ensure the relative stability of the output pressure of the compressed air ejector channel and ensure the atomization effect of the liquid material.

[0047] Preferably, the ejector control valves 2-3 are solenoid valves.

[0048] Preferably, the proportional control valves 2-4 are current-type proportional control valves.

[0049] Preferably, the pressure reducing valve 2-2 in the compressed air ejector channel is a gas pressure reducing valve, and the pressure reducing valve 2-2 in the steam ejector channel is a steam pressure reducing valve.

[0050] Preferably, the feed control valves 1-4 are solenoid valves.

[0051] like Figure 2 As shown, the shut-off valve 2-1, pressure reducing valve 2-2, ejector control valve 2-3, and proportional regulating valve 2-4 in the compressed air ejector channel are respectively compressed air shut-off valve 2-1a, compressed air pressure reducing valve 2-2a, compressed air control valve 2-3a, and compressed air regulating valve 2-4a. The shut-off valve 2-1, pressure reducing valve 2-2, ejector control valve 2-3, and proportional regulating valve 2-4 in the steam ejector channel are respectively steam shut-off valve 2-1b, steam pressure reducing valve 2-2b, steam control valve 2-3b, and steam regulating valve 2-4a. -4b, the dual-medium nozzle 3 connected to the compressed air ejector channel is the compressed air nozzle 3a. The feed control valve 1-4 and pressure transmitter 1-5 connected to the compressed air nozzle 3a are the compressed air feed valve 1-4a and the compressed air transmitter 1-5a, respectively. The dual-medium nozzle 3 connected to the steam ejector channel is the steam nozzle 3b. The feed control valve 1-4 and pressure transmitter 1-5 connected to the steam nozzle 3b are the steam feed valve 1-4b and the steam transmitter 1-5b, respectively. This describes the working mode of the above feeding device.

[0052] The above-mentioned feeding device uses compressed air as the ejector for atomizing the feed liquid to feed tobacco leaves, and includes the following process:

[0053] First, shut off the steam shut-off valve 2-1b, the steam control valve 2-3b, and the steam supply valve 1-4b, and adjust the pressure ratio coefficient of the compressed air regulating valve 2-4a according to the preset standard pressure ratio coefficient.

[0054] The second step is to open the compressed air shut-off valve 2-1a and the compressed air control valve 2-3a, and adjust the pressure range of the compressed air pressure reducing valve 2-2a to the preset compressed air pressure range according to the reading of the pressure gauge 2-6, and then open the compressed air supply valve 1-4a.

[0055] The third step is to start the metering pump 1-1. The liquid raw material in the material tank 4 flows through the compressed air supply valve 1-4a and reaches the compressed air nozzle 3a under the action of the metering pump 1-1. The flow rate and pressure of the raw material are measured by the flow meter 1-3 and the compressed air transmitter 1-5a. The compressed air transmitter 1-5a also converts the pressure signal into a 4-20mA current signal and connects it to the compressed air regulating valve 2-4a to control the pressure of the compressed air ejector channel supplying compressed air to the compressed air nozzle 3a.

[0056] At the same time, compressed air is sent out from the compressed air source, flows through the compressed air shut-off valve 2-1a and is filtered by the filter 2-5. The pressure is reduced to the compressed air pressure range by the compressed air pressure reducing valve 2-2a, and then flows through the compressed air control valve 2-3a to the compressed air regulating valve 2-4a. After being regulated again by the compressed air regulating valve 2-4a, it reaches the compressed air nozzle 3a, which atomizes the liquid raw material in the compressed air nozzle 3a and sprays it out at low temperature.

[0057] The above-mentioned feeding device uses steam as the ejector atomizer for feeding tobacco leaves, and includes the following process:

[0058] First, shut off the compressed air shut-off valve 2-1a, the compressed air control valve 2-3a, and the compressed air supply valve 1-4a. Adjust the pressure ratio coefficient of the steam regulating valve 2-4b according to the preset standard pressure ratio coefficient, and then open the steam shut-off valve 2-1b and the steam supply valve 1-4b.

[0059] The second step is to start the metering pump 1-1. The liquid raw material in the material tank 4 flows through the steam supply valve 1-4b and reaches the steam nozzle 3b under the action of the metering pump 1-1. The flow rate and pressure of the raw material are measured by the flow meter 1-3 and the steam transmitter 1-5b. The steam transmitter 1-5b also converts the pressure signal into a 4-20mA current signal and connects it to the steam regulating valve 2-4b to control the pressure of the steam supplied to the steam nozzle 3b by the steam ejector channel.

[0060] At the same time, steam is sent out from the steam source, flows through the steam shut-off valve 2-1b, and then the steam pressure reducing valve 2-2b reduces the pressure. It then flows through the steam control valve 2-3b to the steam regulating valve 2-4b. After being regulated again by the steam regulating valve 2-4b, it reaches the steam nozzle 3a, which atomizes the liquid raw material in the steam nozzle 3a and sprays it out at high temperature.

[0061] In the above process, the preset compressed air pressure range and standard pressure ratio coefficient are empirical parameters obtained from actual observation of the atomization effect of the feed liquid in the early production or experiment. Among them, there are multiple sets of standard pressure ratio coefficients corresponding to flow rates. When actually selecting, the corresponding standard pressure ratio coefficient should be selected according to the flow rate measured by flow meters 1-3.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0063] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pressure-controlled feeding device for cigarette production, comprising a feeding channel (1) for providing feeding raw materials, an ejection channel (2) for providing ejection medium, and a dual-medium nozzle (3) for spraying liquid feed, wherein the dual-medium nozzle (3) is connected to the ends of the feeding channel (1) and the ejection channel (2) arranged in parallel, characterized in that: Two ejector channels (2) are provided, and a dual-medium nozzle (3) is connected to the end of each of the two ejector channels (2). An ejector control valve (2-3) is provided in the ejector channel (2) to control the connection or disconnection between the ejector channel (2) and the corresponding dual-medium nozzle (3). Either of the two ejector channels (2) is used as a compressed air ejector channel with its front end connected to a compressed air source, and the other is used as a steam ejector channel with its front end connected to a steam source; The front end of the feeding channel (1) is connected to the material tank (4) for storing the raw materials, and the end forms a branch structure with two branches. Each of the two branches is equipped with a feeding control valve (1-4), and the ends of the two branches are respectively connected to the two dual-medium nozzles (3).

2. The feeding device based on pressure regulation in cigarette production according to claim 1, characterized in that: The feeding channel (1) also includes a metering pump (1-1) and a throttle valve (1-2). The metering pump (1-1) is connected in parallel with the throttle valve (1-2), the front end of which is connected to the material tank (4), and the rear end is connected to the branch structure; the raw material in the material tank (4) is fed to the dual-medium nozzle (3) through the feeding channel (1) under the action of the metering pump (1-1).

3. A pressure-controlled feeding device for cigarette production according to claim 2, characterized in that: Also includes flow meters (1-3); The flow meter (1-3) is installed on the feeding channel (1) between the material tank (4) and the branch structure.

4. A pressure-controlled feeding device for cigarette production according to any one of claims 1 to 3, characterized in that: The ejector channel (2) also includes a shut-off valve (2-1), a pressure reducing valve (2-2), and a proportional regulating valve (2-4). The shut-off valve (2-1), the pressure reducing valve (2-2), the ejector control valve (2-3), and the proportional regulating valve (2-4) are sequentially connected between the compressed air source and the dual-medium nozzle (3) or the steam source and the dual-medium nozzle (3); In the branch, a pressure transmitter (1-5) is provided between the feed control valve (1-4) and the dual-medium nozzle (3). The pressure transmitter (1-5) is connected to the proportional regulating valve (2-4) provided in the ejector channel (2) connected to the same dual-medium nozzle (3).

5. A pressure-controlled feeding device for cigarette production according to claim 4, characterized in that: The compressed air ejector channel is also equipped with a filter (2-5), which is connected between the shut-off valve (2-1) and the pressure reducing valve (2-2).

6. A pressure-controlled feeding device for cigarette production according to claim 4, characterized in that: The compressed air ejector channel is also equipped with a pressure gauge (2-6), which is connected between the pressure reducing valve (2-2) and the ejector control valve (2-3).

7. A pressure-controlled feeding device for cigarette production according to claim 4, characterized in that: The ejector control valve (2-3) is a solenoid valve.

8. A feeding device based on pressure regulation in cigarette production according to claim 4, characterized in that: The proportional control valve (2-4) is a current-type proportional control valve.

9. A pressure-controlled feeding device for cigarette production according to claim 4, characterized in that: The pressure reducing valve (2-2) in the compressed air ejector channel is a gas pressure reducing valve, and the pressure reducing valve (2-2) in the steam ejector channel is a steam pressure reducing valve.

10. A feeding device based on pressure regulation in cigarette production according to claim 1, characterized in that: The feed control valve (1-4) is a solenoid valve.

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