Processing mechanism for tobacco shearing treatment

Abstract

The utility model discloses a processing mechanism for tobacco shearing treatment, the processing mechanism comprises a shearing pump, a buffer tank, a sizing tank, a pipeline unit, a flow detection device and a control system, the flow detection device comprises a first flow sensor, the first flow sensor is arranged at the feed end of the shearing pump, the discharge end of the shearing pump is connected with the buffer tank, and the buffer tank is connected with the pipeline unit; the buffer tank is communicated with the sizing tank through a pipeline unit, and the control system can receive a detection signal of the first flow sensor and enables the shear pump and the pipeline unit to enter a stop state or an operation state respectively based on the detection signal. The first flow sensor is arranged to detect the flow of the pipeline unit, once a signal indicating that no flow exists in the pipeline unit due to faults occurs, the signal can be transmitted to the control system, the situation that corollary equipment is damaged due to idle running of a motor of the shearing pump is avoided, discharging of the pipeline unit at the discharging end of the shearing pump can be stopped in time, and the working efficiency is improved. And the condition of pipeline blockage at the discharge end is reduced.

Description

TECHNICAL FIELD

[0001] The patent belongs to the technical field of novel tobacco, and particularly relates to a processing mechanism for tobacco shearing treatment. BACKGROUND

[0002] Novel tobacco products refer to tobacco products containing tobacco or capable of generating smoke, taste, and the feeling of smoking, satisfying the physiological needs of people, but not belonging to other categories such as cigarettes, self-rolled cigarettes, pipe tobacco, water pipes, cigars, cigarillos, chewing tobacco, snuff, and oral tobacco products. It is generally believed that the main ones are electronic cigarettes, low-temperature cigarettes (i.e. heat-not-burn tobacco products), etc.

[0003] The shearing process in the novel tobacco sheet workshop is an inevitable link in the thick slurry test line. The shearing process refers to that the primary stirred fiber powder block is finely ground by a shearing pump and then introduced into a specified storage tank. After processing, the fiber is mixed with the powder for subsequent sizing process.

[0004] Because the shearing pump may have shearing abnormalities, such as rotor breakage of the motor, causing the shearing pump motor to idle. Long-time idling will cause permanent damage to the mechanical seal sleeve of the screw pump. In addition, the abnormality of the shearing pump cannot stop the discharge of the powder at the discharge end, and long-time discharge will cause the discharge end pipeline to be blocked. The existing interlocking state cannot detect this fault, and once the shearing pump has an abnormality, it cannot be fed back to the system in time, which is easy to affect normal production. CONTENT OF THE INVENTION

[0005] The patent aims to provide a processing mechanism for tobacco shearing treatment, which can avoid shearing pump motor idling and discharge end pipeline blockage.

[0006] To solve the above technical problems, the patent adopts the following technical solutions:

[0007] A processing mechanism for tobacco shearing treatment, the processing mechanism comprising a shearing pump, a buffer tank, a sizing tank, a pipeline unit, a flow detection device, and a control system. The flow detection device comprises a first flow sensor, which is arranged at the feeding end of the shearing pump. The discharge end of the shearing pump is connected to the buffer tank. The buffer tank and the sizing tank are communicated through the pipeline unit. The control system can receive the detection signal of the first flow sensor and make the shearing pump and the pipeline unit enter the stop state or the running state based on the detection signal.

[0008] Further, the flow detection device further comprises a second flow sensor, the second flow sensor is arranged at the feeding end of the sizing tank, the control system can receive the detection signal of the second flow sensor, and based on the detection signal of the second flow sensor, the pipe unit is enabled to enter the stop state or the running state.

[0009] Further, the pipe unit comprises a circulating pump, the second flow sensor is arranged at the feeding end of the circulating pump, and the discharging end of the circulating pump is connected with the sizing tank, and based on the detection signal of the second flow sensor, the control system can enable the circulating pump to enter the stop state or the running state.

[0010] Further, the sizing tank is provided with a liquid level detection device, and the liquid level detection device is connected with the control system to enable the circulating pump to enter the stop state or the running state.

[0011] Further, the liquid level detection device comprises an upper limit liquid level sensor, when the material in the sizing tank reaches the position of the upper limit liquid level sensor, the control system enables the circulating pump to enter the stop state.

[0012] Further, the liquid level detection device comprises a lower limit liquid level sensor, when the material in the sizing tank reaches the position of the lower limit liquid level sensor, the control system enables the circulating pump to enter the running state.

[0013] Preferably, the upper limit liquid level sensor and the lower limit liquid level sensor each comprise a contact liquid level sensor and a non-contact liquid level sensor, the contact liquid level sensor comprises a single-flange static pressure / double-flange differential pressure liquid level transmitter, a floating ball liquid level transmitter, a magnetic liquid level transmitter, an immersion liquid level transmitter, an electrically driven inner floating ball liquid level transmitter, an electrically driven floating cylinder liquid level transmitter, a capacitive liquid level transmitter, a magnetostrictive liquid level transmitter and a servo liquid level transmitter, etc. The non-contact liquid level sensor comprises an ultrasonic liquid level transmitter and a radar liquid level transmitter.

[0014] Further, the control system is a PLC control system.

[0015] Further, the processing mechanism further comprises a stirring device, and the stirring device is arranged in the buffer tank and / or the sizing tank.

[0016] Further, the control system is connected with the stirring device, and based on the detection signal, the control system enables the stirring device to enter the stop state or the running state.

[0017] Further, the pipe unit comprises a three-way valve, the first outlet of the three-way valve is connected with the feeding end of the shearing pump, the second outlet of the three-way valve is connected with the discharging end of the buffer tank, and the third outlet of the three-way valve is connected with the feeding end of the sizing tank.

[0018] Further, the three-way valve is an electrically driven regulating valve.

[0019] The flow sensor is preferably mainly composed of a copper valve body, a water flow rotor assembly, a flow stabilizing assembly and a Hall element. It is installed at the water inlet end of the water heater for measuring the water inlet flow. When water flows through the rotor assembly, the magnetic rotor rotates, and the rotation speed linearly changes with the flow. The Hall element outputs corresponding pulse signals to the controller, which judges the water flow size, adjusts the current of the proportional valve, thereby controlling the gas volume through the proportional valve, so as to avoid the phenomenon of summer warm and winter cold during use of the gas water heater. The water flow sensor fundamentally solves the problems of high starting water pressure of the differential pressure type water-gas linkage valve and dry burning caused by misoperation of the flap type water valve. It has the advantages of sensitive reflection, long service life, rapid action, safety and reliability, convenient connection, and ultra-low starting flow (1.5 L / min), and is deeply loved by the majority of users.

[0020] The electric regulating valve is preferably composed of a straight stroke electronic electric actuator and a three-way combined (divided) valve with a cylindrical thin-wall window-shaped valve core. It has the advantages of compact structure, light weight, sensitive action, accurate flow characteristics, direct acceptance of control signals (4-20 mA DC, 0-10 mA DC or 1-5 V DC) and single-phase power supply, and can automatically adjust and control the process pipeline fluid medium, and is widely used in precise control of gas, liquid and steam media. The process parameters such as pressure, flow, temperature and liquid level are kept at the given value. It is suitable for dividing one fluid into two paths through the three-way valve or combining two fluids into one fluid through the three-way valve.

[0021] The patent provides a processing mechanism for tobacco shearing processing. The first flow sensor detects the flow of the pipeline unit. Once a fault occurs, the signal of no flow from the detection pipeline unit is transmitted to the control system, so that the shearing pump and the pipeline unit enter the stop state respectively, avoiding the damage of the matching equipment caused by the idle running of the shearing pump motor, and the unloading of the pipeline unit at the discharge end of the shearing pump can be suspended in time, reducing the blockage of the discharge end pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above content of the patent and the following specific embodiments can be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are only examples of the claimed technical solutions.

[0023] Figure 1 The patent is a structural schematic diagram of the processing mechanism;

[0024] Figure 2 The patent is a signal detection schematic diagram of the liquid level detection device;

[0025] Figure 3 The patent is a schematic diagram of the internal structure of the sizing tank;

[0026] Figure 4 Figure 1 is a schematic diagram of the shear pump structure of the present patent;

[0027] Figure 5 Figure 2 is a schematic diagram of the mechanical seal cover structure of the present patent;

[0028] Figure 6 Figure 3 is a schematic diagram of the device deployment of the processing mechanism of the present patent.

[0029] In which, the figure mark is explained as follows:

[0030] Buffer tank: 1

[0031] First circulating stirrer: 11

[0032] Three-way valve: 2

[0033] First outlet: 21

[0034] Second outlet: 22

[0035] Third outlet: 23

[0036] Shear pump: 3

[0037] Feed end: 31

[0038] Discharge end: 32

[0039] Main shaft: 33

[0040] Blowdown valve: 34

[0041] Shear pump support: 35

[0042] Motor: 36

[0043] Base: 37

[0044] First flow sensor: 41

[0045] Second flow sensor: 42

[0046] Rotary liquid pump: 5

[0047] Sizing tank: 6

[0048] Second circulating stirrer: 61

[0049] Upper limit liquid level sensor: 71

[0050] Lower limit liquid level sensor: 72

[0051] Mechanical seal cover: 8

[0052] Front cover: 81

[0053] Sealing ring: 82

[0054] Impeller nut: 83

[0055] Impeller: 84

[0056] Pump shell: 85

[0057] Mechanical seal: 86

[0058] Mechanical seal box: 87

[0059] Cooling water nozzle: 88

[0060] Seal sleeve support: 89 DETAILED DESCRIPTION

[0061] The detailed features and advantages of the present patent are described in detail in the following detailed description, which is sufficient to enable any person skilled in the art to understand the technical content of the present patent and to implement it, and according to the description, claims and drawings disclosed in the specification, those skilled in the art can easily understand the purposes and advantages related to the present patent.

[0062] It should be noted that in the present specification, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0063] As shown in Figure 1 The present patent provides a processing mechanism for tobacco shearing processing, which comprises a shearing pump 3, a buffer tank 1, a sizing tank 6, a pipeline unit, a flow detection device and a control system. The flow detection device comprises a first flow sensor 41 arranged at the inlet end of the shearing pump 3. The outlet end of the shearing pump 3 is connected to the buffer tank 1. The buffer tank 1 and the sizing tank 6 are communicated through the pipeline unit. The control system can receive the detection signal of the first flow sensor 41 and make the shearing pump 3 and the pipeline unit enter the stop state or the running state based on the detection signal. The outlet end of the shearing pump 3 is communicated with the buffer tank 1 through the pipeline unit, so as to facilitate the shearing circulation process.

[0064] Specifically, the flow detection device further comprises a second flow sensor 42 arranged at the inlet end of the sizing tank 6. The control system can receive the detection signal of the second flow sensor 42 and make the pipeline unit enter the stop state or the running state based on the detection signal of the second flow sensor 42.

[0065] The patent is upgraded for the existing chain state. The first flow sensor 41 and the second flow sensor 42 are arranged to detect the pipeline unit flow. Once a failure occurs to cause a signal of no flow in the detection pipeline unit, the signal is transmitted to the control system. Specifically, the control system includes a reminder device, which can be in the form of a display screen, a signal lamp and an alarm, etc. For example, the reminder device is set as a display screen. When the first flow sensor 41 or the second flow sensor 42 sends a signal of no flow, the signal can be displayed on the display screen, so that the worker can manually control or automatically control the shear pump 3 and the pipeline unit to enter the stop state through the control system. Similarly, when the fault is eliminated, the worker can manually control or automatically control the shear pump 3 and the pipeline unit to enter the running state through the control system.

[0066] Specifically, the pipeline unit includes a three-way valve 2, which is an electrically controlled valve that can be controlled by the control system. The first outlet 21 is connected to the feed end of the shear pump 3, the second outlet 22 is connected to the discharge end of the buffer tank 1, and the third outlet 23 is connected to the feed end of the sizing tank 6. More specifically, the first outlet 21 is connected to the feed end of the shear pump 3 through the pipeline unit, and the third outlet 23 is connected to the feed end of the sizing tank 6 through the pipeline unit.

[0067] Specifically, the pipeline unit includes a liquid transfer pump 5, and the second flow sensor 42 is arranged at the feed end of the liquid transfer pump 5. The discharge end of the liquid transfer pump 5 is connected to the sizing tank 6. The control system can control the liquid transfer pump 5 to enter the stop state or the running state based on the detection signal of the second flow sensor 42. The arrangement of the liquid transfer pump 5 can extend the pipeline unit route and meet the actual production design requirements.

[0068] Specifically, the processing mechanism further includes a stirring device arranged in the buffer tank 1 and / or the sizing tank 6. As an example, the stirring device is arranged in the buffer tank 1 and the sizing tank 6 in this embodiment. The stirring device includes a first circulating stirrer 11 arranged in the buffer tank 1 and a second circulating stirrer 61 arranged in the sizing tank 6.

[0069] Specifically, the control system is connected to the stirring device. The control system controls the stirring device to enter the stop state or the running state simultaneously or delayed with the shear pump 3 and the pipeline unit based on the detection signals of the first flow sensor 41 and the second flow sensor 42. More specifically, the control system controls the first circulating stirrer 11 to enter the stop state or the running state simultaneously or delayed with the shear pump 3 and the pipeline unit based on the detection signal of the first flow sensor 41; and the control system controls the second circulating stirrer 61 to enter the stop state or the running state simultaneously or delayed with the pipeline unit based on the detection signal of the second flow sensor 42.

[0070] Specifically, as shown inFigure 2 As shown, the liquid level detection device is connected to the control system to make the liquid circulating pump 5 enter the stop state or the running state. The liquid level detection device can use the pulse width modulation (PWM) technology to detect the analog time signal, so as to facilitate continuous measurement, and effectively distinguish whether there is material and whether there is material in the pipeline in the sticky material state. The device can effectively detect the solid, liquid and slurry forms, so it is very suitable for the detection of the mixed powder-liquid mixture.

[0071] Specifically, the control system is a PLC control system, and the liquid level detection device is protected from dry running. When the first flow sensor 41 detects that there is no liquid in the pipeline unit for a continuous period of time, a PLC signal of no flow is sent, and then the PLC control system sends a stop command to the screw pump matched with the shear pump 3. When the first flow sensor 41 detects that there is intermittent material within a certain time, a PLC signal of little flow is sent, and then the PLC control system sends a running command, and the screw pump starts to run. The stirring device in the tank stops running until the material in the tank is out.

[0072] More specifically, as shown, Figure 3 The liquid level detection device and the control system can be matched as an automatic material supplementing device in the sizing tank 6. The liquid level detection device includes an upper limit liquid level sensor 71, and more specifically, the liquid level detection device includes a lower limit liquid level sensor 72. After the tobacco material completes the circulating shear process, under the adjustment of the three-way valve 2, the tobacco material is guided to the liquid circulating pump 5 in the pipeline unit, and the liquid circulating pump 5 is started to deliver the material to the sizing tank 6. When the material in the sizing tank 6 reaches the position of the upper limit liquid level sensor 71, the control system makes the liquid circulating pump 5 enter the stop state, and the liquid circulating pump 5 stops supplementing the material to the sizing tank 6. When the material in the sizing tank 6 reaches the position of the lower limit liquid level sensor 72, the control system makes the liquid circulating pump 5 enter the running state, and the liquid circulating pump 5 is started to supplement the material.

[0073] Specifically, the shear pump 3 is matched with a screw pump for shearing the tobacco material, and the shear pump 3 and the screw pump are usually connected through a shaft coupling or a direct shaft. The screw pump is provided with a mechanical seal sleeve 8.

[0074] More specifically, the shear pump of the present patent can use a conventional shear pump on the market. As an example, as shown, Figure 4As shown, the shear pump 3 includes a feed end 31, a discharge end 32, a main shaft 33, a drain valve 34, a shear pump bracket 35, a motor 36, and a base 37. The shear pump 3 is driven by the motor 36 to rotate the main shaft 33, which drives the screw pump to shear and mix the material at high speed. The tobacco material enters the shear pump 3 from the feed end 31, is sheared, and is discharged from the discharge end 32. The drain valve 34 is used to clean the residual material in the pump, and the shear pump bracket 35 and the base 36 ensure the stable operation of the shear pump 3.

[0075] More specifically, the mechanical seal sleeve is a key component for preventing fluid leakage in pump equipment, and the mechanical seal sleeve of the present patent can use a conventional mechanical seal sleeve on the market. As an example, as shown in Figure 5 As shown, the mechanical seal sleeve 8 includes a front cover 81, a seal ring 82, an impeller nut 83, an impeller 84, a pump shell 85, a mechanical seal 86, a seal box 87, a cooling water nozzle 88, and a sleeve bracket 89. The front cover 81 is the front end part of the mechanical seal sleeve 8, connected with the screw pump shell, used to fix and protect the mechanical seal assembly. The seal ring 82 is used to fill the gap between the screw pump shell, preventing fluid leakage from the connection, wherein the seal ring 82 can use an O-ring or a gasket. The impeller nut 83 is used to fix the impeller, ensuring the tight connection of the impeller 84 with the main shaft 33. The impeller 84 converts mechanical energy into kinetic energy of fluid by rotation, realizing high-speed shearing and mixing of the material. The pump shell 85 is the external shell of the mechanical seal sleeve, used to accommodate the impeller 84 and the mechanical seal assembly, while guiding the fluid flow. The mechanical seal 86 is the core component for preventing fluid leakage, composed of a static ring, a dynamic ring, a spring, and an auxiliary seal, forming a sealing surface through the tight contact between the static ring and the dynamic ring, preventing fluid leakage from the gap between the pump shaft and the pump shell. The cooling water nozzle 88 introduces cooling water to cool the sealing surface, preventing overheating damage, and the seal box 87 further ensures the sealing effect, preventing fluid leakage, and the sleeve bracket 89 can support and fix the overall structure of the mechanical seal sleeve.

[0076] Working principle: as Figure 6As shown, tobacco material A enters the buffer tank 1 for stirring, and the material flow direction is controlled by the three-way valve 2. The material enters the shearing pump 3 for a 60-minute shearing circulation process. In the shearing circulation process, the third outlet 23 of the three-way valve 2 can be automatically closed by manual control or automatic control of the control system. At this time, the second flow sensor 42 detects a signal of no flow and makes the transfer pump 5 stop through the control system. When a fault causes the first flow sensor 41 to fail to detect the material flow for 5 seconds, the control system sends a stop command to the shearing pump 3 to make the shearing pump 3 enter a stop state, so as to avoid damage to the mechanical seal caused by long-time idling wear. In addition, the control system can also close the first outlet 21 and the second outlet 22 of the three-way valve 2 based on the signal of no flow transmitted by the first flow sensor 41. At this time, the entire pipeline unit is in a stop state to stop the circulation pipeline between the buffer tank 1 and the shearing pump 3, so as to avoid subsequent congestion, reduce the labor intensity and maintenance time, and improve the production efficiency. After the fault is eliminated, the control system can send a running command to continue the production process, so that the shearing pump 3 and the first outlet 21 and the second outlet 22 of the pipeline unit enter the running state from the stop state, respectively.

[0077] After the shearing circulation process is completed, the first outlet 21 of the three-way valve 2 can be automatically closed by manual control or automatic control of the control system. At this time, the first flow sensor 41 detects a signal of no flow and makes the shearing pump 3 stop through the control system. The material starts to transfer from the buffer tank 1 to the sizing tank 6. When a fault causes the second flow sensor 42 to fail to detect the material flow for 5 seconds, the control system sends a stop command to the transfer pump 5 to make the transfer pump 5 enter a stop state, so as to avoid wear of the stator and the mechanical seal caused by idling of the transfer pump 5. In addition, the control system can also close the second outlet 22 and the third outlet 23 of the three-way valve 2 based on the signal of no flow transmitted by the second flow sensor 42. At this time, the entire pipeline unit is in a stop state to stop the material transfer between the buffer tank 1 and the sizing tank 6. After the fault is eliminated, the control system can send a running command to continue the production process, so that the transfer pump 5 and the second outlet 22 and the third outlet 23 of the pipeline unit enter the running state from the stop state, respectively. When the material in the sizing tank 6 reaches the position of the upper limit level sensor 71 or the lower limit level sensor 72, a detection result is sent to the control system. At this time, the control system takes the detection result of the level detection device as the first priority and sends a stop command or a running command to the transfer pump 5 according to the detection result of the level detection device.

[0078] The terminology and phraseology employed herein is for the purpose of description and not of limitation. There is no intention that the use of such terms and expressions imply excluding any equivalents of the features described (or portions thereof), it being expressly understood that various modifications are possible in the scope of the claims without departing from the spirit of the patent. Other modifications, variations, and alternatives are also possible. Accordingly, the claims should be regarded as encompassing not only the described embodiments but also all equivalent variations that fall within the scope of the claims.

[0079] Also, it is noted that, although the patent has been described herein with reference to particular embodiments, it is not intended to be limited to the specific forms set forth herein, but on the contrary, it is intended to cover such and equivalents, modifications and alternatives falling within the spirit of the patent.

Claims

1. A processing mechanism for tobacco shear processing, characterized by, The processing mechanism comprises a shear pump, a buffer tank, a sizing tank, a pipeline unit, a flow detection device and a control system, The flow detection device comprises a first flow sensor, The first flow sensor is arranged at the feed end of the shear pump, the discharge end of the shear pump is connected to the buffer tank, the buffer tank and the sizing tank are communicated through the pipeline unit, The control system can receive the detection signal of the first flow sensor, and based on the detection signal, the shear pump and the pipeline unit are respectively brought into a stop state or a running state.

2. The processing mechanism of claim 1, wherein, The flow detection device further comprises a second flow sensor, the second flow sensor is arranged at the feed end of the sizing tank, the control system can receive the detection signal of the second flow sensor, and based on the detection signal of the second flow sensor, the pipeline unit is brought into a stop state or a running state.

3. The processing mechanism of claim 2, wherein, The pipeline unit comprises a liquid transfer pump, the second flow sensor is arranged at the feed end of the liquid transfer pump, the discharge end of the liquid transfer pump is connected to the sizing tank, and the control system can based on the detection signal of the second flow sensor to bring the liquid transfer pump into a stop state or a running state.

4. The machine according to claim 3, characterized in that, The sizing tank is provided with a liquid level detection device, the liquid level detection device is connected to the control system to bring the liquid transfer pump into a stop state or a running state.

5. The machine according to claim 4, characterized in that, The liquid level detection device comprises an upper limit liquid level sensor and a lower limit liquid level sensor, When the material in the sizing tank reaches the position of the upper limit liquid level sensor, the control system brings the liquid transfer pump into a stop state; When the material in the sizing tank reaches the position of the lower limit liquid level sensor, the control system brings the liquid transfer pump into a running state.

6. The machine according to claim 3, characterized in that, The control system is a PLC control system.

7. The machine according to claim 2, characterized in that, The processing mechanism further comprises a stirring device, the stirring device is arranged in the buffer tank and / or the sizing tank.

8. The machine according to claim 7, characterized in that, The control system is connected to the stirring device, and based on the detection signal, the stirring device is brought into a stop state or a running state.

9. The machine according to claim 1, characterized in that, The pipeline unit comprises a three-way valve, the first outlet of the three-way valve is connected to the feed end of the shear pump, the second outlet of the three-way valve is connected to the discharge end of the buffer tank, and the third outlet of the three-way valve is connected to the feed end of the sizing tank.

10. The machine according to claim 9, characterized in that, The three-way valve is an electrically adjusted valve.

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