A feedblock for a cast film line

Abstract

The utility model discloses a kind of air path systems of feeding and bar forming machine, including fluidized bed module, dust removal module and air release module, fluidized bed module includes circulating fan, gas distribution tank, fluidized bed main body and suction silk air chamber;Dust removal module includes main fan and central dust removal pipe;Air release module includes controller, valve assembly and air release pipe, air release pipe is connected between gas distribution tank and central dust removal pipe, valve assembly is set on air release pipe, controller is connected with fluidized bed module and valve assembly respectively, valve assembly is configured, when controller receives the brake signal of main fan, valve assembly opens to connect gas distribution tank and central dust removal pipe. By setting air release module, controller can accurately obtain shutdown information, and residual positive pressure airflow is discharged to central dust removal pipe by air release pipe independent of fluidized bed module.

Description

Technical Field

[0001] This utility model relates to the field of cigarette machine technology, and in particular to a ventilation system for a feeding and forming machine. Background Technology

[0002] The feeding and forming machine is a crucial component of the cigarette rolling machine, typically consisting of a fluidized bed, sorting structure, and dust removal system. Its main function is to dry and fluidize tobacco shreds before attaching them to cigarette paper. During assembly, precise alignment of the fluidized bed nozzles and the tobacco suction channel is essential. Some newer feeding and forming machines on the market, such as the YJ118 model, feature a movable fluidized bed, allowing the nozzles at the end of the fluidized bed to move relative to the suction channel, ensuring smooth and leak-free tobacco suction. The internal chamber of the fluidized bed can also be opened for easy inspection and maintenance when the equipment is shut down. However, these types of feeding and forming machines do not consider the residual air pressure during fluidized bed descent. Directly moving the fluidized bed allows the residual positive pressure gas in the fluidized bed chamber to blow the tobacco shreds trapped at the nozzles out of the equipment, polluting the environment and potentially harming the health of operators. Utility Model Content

[0003] The purpose of this invention is to provide a ventilation system for a feeding and forming machine that automatically vents air to prevent tobacco shreds and dust from being blown into the production environment.

[0004] To achieve this objective, the present invention adopts the following technical solution: A feeding and forming machine airflow system includes a fluidized bed module, a dust removal module, and an air venting module. The fluidized bed module includes a circulating fan, an air distribution box, a fluidized bed body, and a wire suction chamber. The air distribution box, the fluidized bed body, and the wire suction chamber are sequentially connected. The input end of the circulating fan is connected to the top of the fluidized bed body through a dust collector. The fluidized bed body is provided with an arc-shaped airflow distribution plate, and the airflow distribution plate is provided with multiple fluidized bed nozzles. The multiple fluidized bed nozzles are spaced apart along the vertical direction. The uppermost fluidized bed nozzle is positioned opposite to the wire suction chamber. The uppermost fluidized bed nozzle can... The airflow moves toward or away from the suction chamber; the dust removal module includes a main fan and a central dust removal pipe, the output end of the main fan is connected to the central dust removal pipe, and the input end of the main fan is connected to the output end of the dust collector and the suction chamber respectively; the venting module includes a controller, a valve assembly and a venting pipe, the venting pipe is connected between the air distribution box and the central dust removal pipe, the valve assembly is disposed on the venting pipe, the controller is connected to the fluidized bed module and the valve assembly respectively, and the valve assembly is configured such that when the controller receives the braking signal of the main fan, the valve assembly opens to connect the air distribution box and the central dust removal pipe.

[0005] Preferably, the valve assembly includes a solenoid valve and a pneumatic butterfly valve, the pneumatic butterfly valve being connected to the vent pipe, and the solenoid valve being connected to the pneumatic butterfly valve via a pipeline and also connected to the controller signal.

[0006] Preferably, the vent pipe includes a vertical section and a bent section, and the air distribution box, the vertical section, the bent section and the central dust removal pipe are connected in sequence. The vertical section and the bent section are arranged at an angle and define a clearance portion, which is used to avoid the fluidized bed body.

[0007] Preferably, the vertical section is provided with a flange at the end away from the bending section, the flange is arranged around the vent pipe, and the flange is bolted to the side wall of the air distribution box.

[0008] Preferably, a sealing strip is provided between the flange and the side wall of the gas distribution box.

[0009] Preferably, the vent pipe is made of stainless steel.

[0010] Preferably, the bottom end of the airflow distribution plate is connected to a lifting component, which is used to drive the fluidized bed body to rise and fall. A first position sensor is provided on one side of the fluidized bed body. The first position sensor is used to detect whether the fluidized bed body is at the upper limit position. The first position sensor is connected to the controller signal.

[0011] Preferably, the lifting component is a cylinder, and one end of the airflow distribution plate near the suction chamber can rotate relative to the other end. The middle section of the bottom of the airflow distribution plate is connected to the output end of the cylinder.

[0012] Preferably, the fluidized bed module further includes a guide rail, and the wire suction chamber is slidably connected to the guide rail in the vertical direction. A second position sensor is provided on one side of the bottom of the guide rail. The second position sensor is used to detect whether the wire suction chamber is at the lower limit position. The second position sensor is signal-connected to the controller.

[0013] The beneficial effects of this invention are as follows: When the feeding and forming machine stops, the main blower brakes and sends a braking signal to the controller. Simultaneously, the airflow distribution plate moves, causing the fluidized bed nozzles to move away from the suction chamber. After receiving the stop signal, the controller controls the valve assembly to open, connecting the air distribution box and the central dust removal pipe. The residual positive pressure airflow from the circulating fan in the air distribution box flows to the central dust removal pipe under the guidance of the vent pipe, instead of being ejected from the fluidized bed nozzles, thus preventing the retained tobacco from being blown out of the opened fluidized bed. By setting up a vent module, the controller can accurately obtain stop information and guide the residual positive pressure airflow to the central dust removal pipe through a vent pipe independent of the fluidized bed module. The structure is simple and can automatically vent, avoiding equipment stoppage. After the fluidized bed opens, the retained tobacco is blown into the production environment, improving safety and environmental protection. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the air path system of the feeding and forming machine according to an embodiment of this application;

[0015] Figure 2 This is a schematic diagram of the airflow inside the gas distribution box according to an embodiment of this application;

[0016] Figure 3 This is a schematic diagram of the structure of the vent pipe according to an embodiment of this application.

[0017] In the diagram: 11. Circulating fan; 12. Air distribution box; 13. Fluidized bed body; 14. Wire suction chamber; 15. Dust collector; 21. Main fan; 22. Central dust collection pipe; 31. Pneumatic butterfly valve; 32. Drain pipe; 321. Vertical section; 322. Bending section. Specific Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0019] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0022] Reference Figure 1 and Figure 3 ( Figure 3 As shown in the figure (solid line represents the airflow when the fluidized bed module is running, dashed line represents the airflow when the fluidized bed module is stopped), a feeding and forming machine airflow system provided according to an embodiment of this application includes a fluidized bed module, a dust removal module and an air venting module. The fluidized bed module includes a circulating fan 11, an air distribution box 12, a fluidized bed body 13, a primary sorting device and a secondary sorting device and a wire suction chamber 14. The air distribution box 12, the fluidized bed body 13 and the wire suction chamber 14 are connected in sequence, and a flow regulation branch is also provided between the air distribution box 12 and the fluidized bed body 13. The input end of the circulating fan 11 is connected to the top pipe of the fluidized bed body 13 via a cyclone dust collector 15. The fluidized bed body 13 is equipped with an upward-opening arc-shaped airflow distribution plate with multiple fluidized bed nozzles. These nozzles are spaced vertically, with the uppermost nozzle facing the suction chamber 14. The uppermost nozzle can move towards or away from the suction chamber 14. The primary and secondary sorting devices are distributed sequentially on the side of the airflow distribution plate away from the suction chamber 14 and are both connected to the air distribution box 12. The fluidized bed body 13 and the fixed structure inside the feeding and forming machine cooperate to form a fluidized bed chamber for the fluidization and diffusion of tobacco shreds. As the fluidized bed body 13 descends, the fluidized bed chamber opens simultaneously. A tobacco stem conveying channel is arranged below the fluidized bed body 13, which is connected to the air distribution box 12 and the output end of the main fan 21.

[0023] The dust removal module includes a main fan 21 and a central dust removal pipe 22. The output end of the main fan 21 is connected to the central dust removal pipe 22, and the input end of the main fan 21 is connected to the output ends of the dust collector 15 and the wire suction chamber 14, respectively. The venting module includes a controller, a valve assembly, and a venting pipe 32. The venting pipe 32 is connected between the air distribution box 12 and the central dust removal pipe 22. The valve assembly is installed on the venting pipe 32. The controller is connected to both the fluidized bed module and the valve assembly. The valve assembly is configured such that when the controller receives a braking signal from the main fan 21, it controls the valve assembly to open to connect the air distribution box 12 and the central dust removal pipe 22.

[0024] The airflow path of the feeding and forming machine's ventilation system is as follows:

[0025] When the circulating fan 11 is working, the fan outlet flow rate is approximately 1340 m³ / h. 3 / h, the airflow enters the air distribution box 12 on both sides of the machine through a Φ150mm duct, where it is distributed. The pressure inside the air distribution box 12 is 45mbar. Most of the airflow distributed by the air distribution box 12 enters the fluidized bed body 13. The input end of the circulating fan 11 is connected to the upper duct of the fluidized bed body 13, thus forming an internal airflow circulation loop. The air distribution box 12 distributes positive pressure airflow to the nozzles of the primary sorting device, the nozzles of the secondary sorting device, the fluidized bed nozzles (three locations), the flow regulation branch, and the tobacco stem conveying channel. The airflow at the nozzles of the secondary sorting device and the fluidized bed nozzles (three locations) directly depends on the airflow pressure inside the air distribution box 12 and is not equipped with a separate regulating valve. However, manual throttling devices are installed in the channels of the primary sorting device and the flow regulation branch.

[0026] The duct connecting the circulating fan 11 to the upper space of the fluidized bed body 13 has a diameter of Φ150 mm. A throttling valve is installed in front of the inlet of the circulating fan 11. The dust collector 15 is connected to the input pipe of the main fan 21 through three branch lines, thereby carrying the dust filtered by the dust collector 15 to the centralized dust collection system. During normal operation, the airflow from the upper space of the fluidized bed body 13 to the circulating fan 11 is approximately 1720 m³ / s. 3 / h, of which the flow rate into the main fan 21 pipeline through the branch of dust collector 15 is approximately 380m³ / h. 3 / h.

[0027] The main fan 21 is connected to the suction chamber 14 via a duct with a diameter of Φ120 mm. An automatically controlled throttling valve is installed at the input end of the main fan 21 to maintain a stable negative pressure inside the suction chamber 14, preventing large fluctuations that could affect the internal quality of the cigarette. The airflow rate entering the main fan 21 from the suction chamber 14 is approximately 790 m³ / s. 3 / h. Additionally, the dust removal passage above the system has a flow rate of approximately 120m³ / h. 3An airflow of / h enters the inlet pipe of the main fan 21, so the airflow rate discharged into the central dust removal pipe 22 through the main fan 21 is approximately 1290m³ / h. 3 / h.

[0028] When the user selects to have the tobacco stems delivered to the central dust collection pipe 22, the flow rate will increase by approximately 90m³. 3 An airflow of / h enters the centralized dust collection duct, at which point the total flow rate in the centralized dust collection duct will reach 1380m³ / h. 3 / h.

[0029] When the system is shut down (for maintenance, repair, or cleaning of the fluidized bed chamber), the main fan 21 and the circulating fan 11 brake, and the fluidized bed body 13 descends to open the fluidized bed chamber. At this time, since the circulating fan 11 has not completely stopped, it will still deliver a certain amount of positive pressure airflow to the air distribution box 12. With the fluidized bed chamber open, the tobacco and dust in the fluidized bed chamber will be blown out of the feeding machine by the residual positive pressure airflow as the fluidized bed body 13 descends. The blown-out dust and tobacco not only affect the production environment but also the health of the operators.

[0030] Understandably, when the feeding and forming machine stops, the main fan 21 and the circulating fan 11 brake and send a braking signal to the controller. At the same time, the airflow distribution plate moves, causing the fluidized bed nozzles to move away from the suction chamber 14. After receiving the braking signal, the controller controls the valve assembly to open the connection between the air distribution box 12 and the central dust removal pipe 22. The positive pressure airflow of the circulating fan 11 remaining in the air distribution box 12 flows to the central dust removal pipe 22 under the guidance of the vent pipe 32, and will not be sprayed out from the fluidized bed nozzles, thus preventing the stagnant tobacco from being blown out from the opened fluidized bed.

[0031] By setting up a venting module, the controller can accurately obtain shutdown information and guide the residual positive pressure airflow to the central dust removal pipe 22 through the venting pipe 32, which is independent of the fluidized bed module. The structure is simple and can automatically vent, avoiding equipment shutdown. After the fluidized bed is opened, the retained tobacco shreds and dust are blown into the production environment, improving safety and environmental protection.

[0032] Furthermore, the valve assembly includes a solenoid valve and a pneumatic butterfly valve 31. The solenoid valve is a three-position five-way valve. The solenoid valve and the pneumatic butterfly valve 31 are connected to the vent pipe 32. The solenoid valve is connected to the pneumatic actuator pipeline of the pneumatic butterfly valve 31 and is also connected to the controller signal. When the feeding and forming machine is working, the controller receives the working signal of the feeding and forming machine and controls the solenoid valve to close. There is no airflow in the actuator of the pneumatic butterfly valve 31, and the pneumatic butterfly valve 31 separates the air distribution box 12 and the central dust removal pipe 22. When the feeding and forming machine stops, the controller receives the stop signal and controls the solenoid valve to change the air, causing the pneumatic butterfly valve 31 to open and connect the vent pipe 32 between the air distribution box 12 and the central dust removal pipe 22.

[0033] By setting up a solenoid valve and a pneumatic butterfly valve 31, the valve assembly structure can be simplified, and the valve assembly installation and control can be facilitated. Furthermore, for medium and large diameter vent pipes 32, the combined cost of the solenoid valve and the pneumatic butterfly valve 31 is usually much lower than that of an electric actuator with the same torque, which can significantly reduce the cost of using the vent module.

[0034] Reference Figure 2 As shown, it can be understood that the vent pipe 32 includes a vertical section 321 and a bent section 322. The air distribution box 12, the vertical section 321, the bent section 322 and the central dust removal pipe 22 are connected in sequence. The pneumatic butterfly valve 31 is installed on the vertical section 321. The vertical section 321 and the bent section 322 are arranged at an angle and define a clearance section. The clearance section is used to avoid the fluidized bed body 13.

[0035] Due to the complex internal structure and numerous components of the feeding and forming machine, by setting up an avoidance section, the vent pipe 32, after being led out from the side wall of the air distribution box 12, can cross the top of the fluidized bed body 13 (including the pipeline between the fluidized bed body 13 and the dust collector 15) and connect to the central dust removal pipe 22. The space between the top of the fluidized bed and the inner top wall of the feeding and forming machine is used to accommodate and install the vent pipe 32, avoiding interference between the vent pipe 32 and the fluidized bed body 13, effectively improving the structural rationality of the vent pipe 32 and increasing the space utilization rate of the vent module.

[0036] Furthermore, a flange is provided at the end of the vertical section 321 away from the bending section 322. The flange is rectangular or square in shape and is arranged around the vent pipe 32. Several first screw holes are provided on the flange at intervals. The side wall of the air distribution box 12 is provided with second screw holes that correspond one-to-one with the first screw holes. The flange is bolted to the side wall of the air distribution box 12.

[0037] By setting up a flange, users do not need to design a new air distribution box 12. The flange can be fixed by opening a second screw hole on the side wall of the existing air distribution box 12 according to the flange specifications, so as to achieve a fixed connection between the air distribution box 12 and the vent pipe 32, thereby reducing the layout cost of the vent module.

[0038] In some embodiments, a sealing strip is sandwiched between the flange and the side wall of the air distribution box 12, and the sealing strip is annular and surrounds the vent pipe 32.

[0039] By setting a sealing strip, after the flange is fixed, the sealing strip can fill the gap between the flange and the side wall of the air distribution box 12, effectively improving the sealing performance between the vent pipe 32 and the air distribution box 12, and preventing air leakage from affecting the internal structure of the feeding strip forming machine.

[0040] Preferably, the vent pipe 32 is made of stainless steel.

[0041] By using stainless steel pipe for the vent pipe 32, the cost of the vent pipe 32 is limited while ensuring its strength and extending its service life.

[0042] In some embodiments, a lifting member is connected to the bottom end of the airflow distribution plate, which drives the airflow distribution plate to rise and fall. A first position sensor is provided on one side of the airflow distribution plate. Optionally, the first position sensor can be a laser sensor, an infrared sensor, etc., which will not be described in detail here. The first position sensor is used to detect whether the airflow distribution plate is at its upper limit position. The first position sensor is connected to the controller signal. When the airflow distribution plate is at its upper limit position, that is, the uppermost fluidized bed nozzle is opposite to the suction chamber 14, the fluidized bed body 13 is in a closed state, and the sulfurized tobacco in the fluidized bed chamber can be automatically adsorbed onto the tobacco paper in the suction chamber 14. When the first position sensor detects that the airflow distribution plate leaves the upper limit position, that is, the airflow distribution plate descends and the fluidized bed chamber opens, the controller can receive the airflow distribution plate descent signal sent by the first position sensor, and the controller controls the valve assembly to open to connect the air distribution box 12 and the central dust removal pipe 22.

[0043] If a communication failure occurs between the main fan 21 and the controller, the controller may fail to receive the braking signal in time or may incorrectly receive the braking signal, resulting in the valve assembly failing to open in time or remaining closed, and the air distribution box 12 failing to discharge residual positive pressure airflow in time. By setting a first position sensor, in addition to the controller receiving the braking signal, another control signal (i.e., the air distribution plate descent signal) can be provided to the controller, ensuring that the valve assembly can be quickly activated the moment the air distribution plate descends, connecting the vent pipe 32 and the air distribution box 12, effectively improving the vent module's response speed and fault tolerance.

[0044] Furthermore, the lifting component is configured as a cylinder. One end of the airflow distribution plate near the wire suction chamber 14 is a free end, and the other end is a fixed end that is rotatably installed in the feeding and forming machine. The free end can rotate relative to the fixed end with the fixed end as the fulcrum. The middle section of the bottom of the airflow distribution plate is connected to the output end of the cylinder.

[0045] By setting the airflow distribution plate as a rotating structure, compared with the traditional up-and-down lifting, the rotating lifting makes it easier for users to adjust the angle of the fluidized bed nozzles. This facilitates the alignment of the fluidized bed nozzles with the wire suction chamber 14, while also increasing the opening angle of the fluidized bed chamber, making it easier for users to maintain and clean later.

[0046] In some embodiments, the fluidized bed module further includes a guide rail, and the suction chamber 14 is slidably connected to the guide rail in a vertical direction (the suction chamber 14 is driven by a linear drive such as a cylinder, lead screw, or linear module). A second position sensor is provided on one side of the bottom of the guide rail. The sensor is used to detect whether the suction chamber 14 is at its lower limit position. The second position sensor is connected to the controller signal. The suction chamber 14 is at its lower limit position when the fluidized bed module is working, and moves up to its upper limit position when the fluidized bed module stops. When the second position sensor detects that the suction chamber 14 has left the lower limit position, that is, the suction chamber 14 rises and the fluidized bed chamber opens, the controller can receive the rising signal of the suction chamber 14 from the second position sensor, and the controller controls the valve assembly to open to connect the air distribution box 12 and the central dust removal pipe 22.

[0047] By setting up a sliding suction chamber 14, the opening angle of the fluidized bed chamber can be further increased, while also facilitating user maintenance and cleaning of the suction chamber 14. By setting up a second position sensor, in addition to receiving a braking signal, the controller can be provided with another control signal (i.e., a signal indicating the suction chamber 14 is rising). This ensures that the valve assembly can quickly activate the suction chamber 14 upon its initial rise, connecting the vent pipe 32 and the air distribution box 12, effectively improving the vent module's response speed and fault tolerance.

[0048] Preferably, when the feeding and forming machine stops, the braking of the main fan 21 and the circulating fan 11 is synchronized with the movement of the suction chamber 14 and the fluidized bed. Therefore, in the design of the fluidized bed module, the braking signal of the main fan 21, the braking signal of the circulating fan 11, the downward signal of the airflow distribution plate of the first position sensor, and the upward signal of the suction chamber 14 of the second position sensor can be compiled in a unified manner, so that the four signals are sent to the controller in the form of the same stop signal, which facilitates the compilation of the controller control program.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A ventilation system for a feeding and forming machine, characterized in that, include: The fluidized bed module includes a circulating fan (11), an air distribution box (12), a fluidized bed body (13), and a wire suction chamber (14). The air distribution box (12), the fluidized bed body (13), and the wire suction chamber (14) are connected in sequence. The input end of the circulating fan (11) is connected to the top of the fluidized bed body (13) through a dust collector (15). The fluidized bed body (13) is provided with an arc-shaped airflow distribution plate. The airflow distribution plate is provided with multiple fluidized bed nozzles. The multiple fluidized bed nozzles are arranged at intervals along the vertical direction. The uppermost fluidized bed nozzle is arranged opposite to the wire suction chamber (14). The uppermost fluidized bed nozzle can move towards or away from the wire suction chamber (14). The dust removal module includes a main fan (21) and a central dust removal pipe (22). The output end of the main fan (21) is connected to the central dust removal pipe (22), and the input end of the main fan (21) is connected to the output end of the dust collector (15) and the wire suction chamber (14), respectively. The venting module includes a controller, a valve assembly, and a venting pipe (32). The venting pipe (32) is connected between the air distribution box (12) and the central dust removal pipe (22). The valve assembly is disposed on the venting pipe (32). The controller is connected to the fluidized bed module and the valve assembly respectively. The valve assembly is configured such that when the controller receives a braking signal from the main fan (21), the valve assembly opens to connect the air distribution box (12) and the central dust removal pipe (22).

2. The air circulation system of the feeding and forming machine according to claim 1, characterized in that, The valve assembly includes a solenoid valve and a pneumatic butterfly valve (31). The pneumatic butterfly valve (31) is connected to the vent pipe (32). The solenoid valve is connected to the pneumatic butterfly valve (31) via a pipeline and is also connected to the controller signal.

3. The air circulation system of the feeding and forming machine according to claim 1 or 2, characterized in that, The vent pipe (32) includes a vertical section (321) and a bent section (322). The air distribution box (12), the vertical section (321), the bent section (322) and the central dust removal pipe (22) are connected in sequence. The vertical section (321) and the bent section (322) are arranged at an angle and define a clearance portion. The clearance portion is used to avoid the fluidized bed body (13).

4. The air circulation system of the feeding and forming machine according to claim 3, characterized in that, The vertical section (321) is provided with a flange at one end away from the bent section (322). The flange is arranged around the vent pipe (32) and is bolted to the side wall of the air distribution box (12).

5. The air circulation system of the feeding and forming machine according to claim 4, characterized in that, A sealing strip is provided between the flange and the side wall of the gas distribution box (12).

6. The air circulation system of the feeding and forming machine according to claim 1, characterized in that, The vent pipe (32) is made of stainless steel.

7. The air circulation system of the feeding and forming machine according to claim 1, characterized in that, The bottom end of the airflow distribution plate is connected to a lifting component, which is used to drive the airflow distribution plate to rise and fall. A first position sensor is provided on one side of the airflow distribution plate. The first position sensor is used to detect whether the airflow distribution plate is at the upper limit position. The first position sensor is signal-connected to the controller.

8. The air circulation system of the feeding and forming machine according to claim 7, characterized in that, The lifting component is configured as a cylinder, and the end of the airflow distribution plate near the suction chamber (14) can rotate relative to the other end. The middle section of the bottom of the airflow distribution plate is connected to the output end of the cylinder.

9. The air circulation system of the feeding and forming machine according to claim 1, characterized in that, The fluidized bed module also includes a guide rail. The suction chamber (14) is slidably connected to the guide rail in the vertical direction. A second position sensor is provided on one side of the bottom of the guide rail. The second position sensor is used to detect whether the suction chamber (14) is at the lower limit position. The second position sensor is connected to the controller signal.

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