Reconstituted tobacco drying oven with anti-falling function

Abstract

The invention relates to the field of reconstituted tobacco production equipment, and provides a reconstituted tobacco drying oven with an anti-falling function, and when an upper drying oven and a lower drying oven are separated into two parts, the drying oven is in an inspection state. The anti-falling function and the warning function are added for the reconstituted tobacco drying oven in the inspection state, the control mechanism is arranged to regulate and control the upper drying oven lifting mechanism and the anti-falling mechanism, the lifted upper drying oven is stable and does not fall off, and the personal safety of maintenance personnel during inspection of the drying oven is guaranteed; and if the supporting block is not monitored within 30 seconds after the upper oven finishes working, a signal is sent to the control mechanism, the control mechanism sends the received signal to the alarm lamp, and the alarm lamp bees to warn maintenance personnel, so that the safety of production operation is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of reconstituted tobacco production equipment, and in particular to a reconstituted tobacco drying oven with an anti-falling function. Background Art

[0002] Reconstituted tobacco, also known as tobacco flakes, refers to a recycled product in sheet or filament form made from discarded tobacco stems, tobacco dust, and broken tobacco flakes during cigarette processing, which is used as cigarette filler. Reconstituted tobacco plays an important role in cigarette production, not only reducing the cost of cigarettes, but also improving the intrinsic quality of cigarettes. The manufacture of reconstituted tobacco began in the 1950s. The main manufacturing methods include thick pulp method, roller pressing method and papermaking method, and the papermaking method is divided into wet papermaking method and dry papermaking method. Compared with the currently produced roller pressing method and thick pulp method reconstituted tobacco, papermaking method reconstituted tobacco has unique advantages, including low density and high filling value; good mechanical processing resistance and high silk rate; fast burning speed and low tar release; good product plasticity, etc.

[0003] The baking of reconstituted tobacco leaves is an important part of the process of reconstituted tobacco leaves, and the quality of baking is directly related to the quality of finished tobacco leaves. The basic principle of tobacco leaf baking is to use hot air to dry the tobacco leaves, so that the moisture in the tobacco leaves is discharged, so that the tobacco leaves are baked yellow and dry; Figure 1 As shown, multiple reconstituted tobacco ovens jointly bake tobacco slices during the baking process to improve the efficiency of baking output. Therefore, in order to ensure the quality of baking, the oven needs to be maintained and inspected frequently. In this process, usually after the lifting cylinder lifts up the oven cover, the maintenance personnel will lean into the oven for a short time to inspect and repair, which poses a great safety hazard. It is very likely that the oven cover will fall due to unstable air pressure, cylinder failure and other reasons, causing a safety accident. The demand for reconstituted tobacco production is unstable. There is sudden mass production, as well as long-term shutdown and assembly line production. The design of the existing reconstituted tobacco oven only takes into account short-term cleaning, and does not take into account long-term shutdown and maintenance, or it is not used for a long time (inspection state) according to process requirements. The cylinder cannot maintain the lifting state, or the risk of falling after lifting is significantly increased. Summary of the invention

[0004] In order to ensure the life safety of maintenance personnel of the reconstituted tobacco drying oven, improve the safety and stability of the oven under inspection, and improve the means of risk prevention of safety accidents, this patent provides the following technical solutions:

[0005] A reconstituted tobacco drying oven with an anti-falling function, the reconstituted tobacco drying oven comprising: an upper drying oven, a lower drying oven, and an upper drying oven lifting mechanism. The reconstituted tobacco drying oven also comprises an anti-falling mechanism. When the reconstituted tobacco drying oven is in an inspection state, the upper drying oven is lifted by the upper drying oven lifting mechanism and away from the lower drying oven, and the anti-falling mechanism is activated and used to prevent the upper drying oven from falling.

[0006] Furthermore, the upper oven lifting mechanism includes a lifting cylinder and a position sensor; the lifting cylinder connects the upper oven and the lower oven, and the position sensor is arranged on the lifting cylinder and is used to send an electrical signal; when the upper oven lifting mechanism is turned on, the lifting cylinder lifts the upper oven in the axial direction and away from the lower oven, and the position sensor senses the position of the upper oven lifted by the lifting cylinder.

[0007] Furthermore, the lifting cylinder includes a cylinder seat, a cylinder barrel, an upper latch and a lower latch.

[0008] Furthermore, the anti-falling mechanism includes a moving module and a supporting block; the moving module is used to receive electrical signals, and the supporting block is used to support the upper oven; when the anti-falling mechanism is turned on, the moving module receives the electrical signal and drives the supporting block to move in a radial direction between the upper oven and the lower oven to prevent the upper oven from falling.

[0009] Furthermore, the reconstituted tobacco leaf drying oven also includes an alarm mechanism, which is activated after the anti-fall mechanism is turned on, and the alarm mechanism includes a support block sensor and an alarm light; the support block sensor is arranged at the bottom of the upper oven and sends an electrical signal, and the alarm light is arranged at the top of the upper oven; the support block sensor includes a grating; when the alarm mechanism is activated, the support block sensor senses the support block, and if the support block sensor cannot sense the existence of the support block, the alarm light gives an alarm through a buzzing sound.

[0010] Furthermore, the reconstituted tobacco drying oven also includes a control mechanism, which is used to receive electrical signals, convert electrical signals and send electrical signals, and the control mechanism is arranged adjacent to the lower drying oven.

[0011] Furthermore, when the reconstituted tobacco drying oven changes from a working state to an inspection state, the control mechanism controls the upper oven lifting mechanism and the anti-fall mechanism to perform the following steps: S1: the lifting cylinder lifts the upper oven to the position specified by the position sensor; S2: the moving module drives the support block to support the lifted upper oven; S3: the support block sensor monitors the existence of the support block.

[0012] Furthermore, in step S1, the position sensor sends a first electrical signal to the control mechanism, and the control mechanism converts the received first electrical signal into a second electrical signal and sends the second electrical signal to the mobile module.

[0013] Furthermore, in step S3, the support block sensor has a response time for monitoring the support block. After the response time is exceeded, the grating will send a third electrical signal to the control mechanism, and the control mechanism converts the received third electrical signal into a fourth electrical signal and sends the fourth electrical signal to the alarm light.

[0014] Furthermore, the response time is 16-21s, 21-26s, 26-31s, 31-36s, 36s-41s or 41-46s.

[0015] This patent has the following beneficial effects:

[0016] 1. This patent relates to the field of reconstituted tobacco production equipment, and provides a reconstituted tobacco drying oven with an anti-falling function, an upper oven lifting mechanism and an anti-falling mechanism connecting the upper oven and the lower oven, and a control mechanism for processing electrical signals and controlling the anti-falling mechanism and the alarm mechanism. When the upper oven and the lower oven are separated into two parts, the oven is in an inspection state. This patent adds an anti-falling function and an alarm function to the reconstituted tobacco drying oven in the inspection state to ensure the personal safety of maintenance personnel inspecting the oven;

[0017] 2. The upper oven lifting mechanism in this patent includes a lifting cylinder and a position sensor, and the anti-falling mechanism includes a moving module and a support block. The oven can be lifted to a specified position by the cooperation of the lifting cylinder and the position sensor; the lifted upper oven can be further supported by the cooperation of the moving module and the support block, and a control mechanism is provided to regulate the upper oven lifting mechanism and the anti-falling mechanism, so that the lifted upper oven is stable and does not fall;

[0018] 3. This patent also has an alarm mechanism, that is, when the maintenance personnel are performing maintenance and inspection work, the support block sensor monitors whether there is a support block between the upper oven and the lower oven. If the support block is not detected within 30 seconds after the upper oven ends its working state, a signal is sent to the control mechanism, and the control mechanism sends the received signal to the alarm light, which emits a buzzer sound to alert the maintenance personnel, greatly improving the safety of production operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of this patent, the following is a brief introduction to the drawings required for use in the embodiment. It should be understood that the following drawings only show certain embodiments of this patent and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a process flow chart of multiple oven baking of reconstituted tobacco leaves in actual production;

[0021] Figure 2 It is a three-dimensional schematic diagram of the reconstituted tobacco leaf drying oven in this patent;

[0022] Figure 3 Another perspective schematic diagram of the reconstituted tobacco drying oven in this patent;

[0023] Figure 4It is a three-dimensional schematic diagram of the lifting cylinder and the position sensor in this patent;

[0024] Figure 5 This is a three-dimensional schematic diagram of the moving module and the supporting block in this patent.

[0025] The reference numerals are described as follows:

[0026] 100: put into oven;

[0027] 200: lower oven;

[0028] 300: upper oven lifting mechanism;

[0029] 310: Lifting cylinder;

[0030] 311: Cylinder seat;

[0031] 312: Cylinder barrel;

[0032] 313: upper latch;

[0033] 314: lower latch;

[0034] 320: Position sensor;

[0035] 400: anti-fall mechanism;

[0036] 410: Mobile module;

[0037] 420: support block;

[0038] 500: warning agency;

[0039] 510: support block sensor;

[0040] 520: Warning light;

[0041] 600: Control mechanism. DETAILED DESCRIPTION

[0042] The detailed features and advantages of this patent are described in detail in the specific implementation method below, and the content is sufficient to enable any technical personnel in this field to understand the technical content of this patent and implement it accordingly. According to the description, claims and drawings disclosed in this specification, technical personnel in this field can easily understand the relevant purposes and advantages of this patent.

[0043] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0044] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method. The orientation or positional relationship indicated by the terms "upper", "lower", etc. is defined by the coordinate reference of the accompanying drawings, only for the convenience of describing this patent 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 cannot be understood as a limitation on this patent. The terms "first", "second", etc. are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0046] The mobile module is an automation upgrade unit following the linear guide, linear motion module, and ball screw linear transmission mechanism. It can realize the linear and curved motion of the load through the combination of various units, making the automation of light loads more flexible and the positioning more accurate. The mobile module can be divided into three types: synchronous belt type, ball screw type, and linear motor type.

[0047] The belt of the synchronous belt type moving module is installed on the transmission shaft on both sides of the linear module, which serves as the power input shaft. A slider for adding equipment workpieces is fixed on the belt. When there is input, the slider moves by driving the belt. Usually, the synchronous belt type linear module is specially designed, and the tightness of the belt movement can be controlled on one side to facilitate the debugging of the equipment during the production process. The synchronous belt type linear module can choose to add rigid guide rails to improve the rigidity of the linear module according to different load requirements. Linear modules of different specifications have different load limits. The accuracy of the synchronous belt type linear module depends on the quality of the belt and the processing process in the combination. The control of power input will also affect its accuracy.

[0048] The ball screw type moving module is an ideal product for converting rotary motion into linear motion, or converting linear motion into rotary motion. The ball screw consists of a screw, a nut and a ball. Its function is to convert rotary motion into linear motion, which is a further extension and development of the ball screw. The important significance of this development is to convert the rolling motion of the bearing into sliding motion. Due to its small friction resistance, the ball screw is widely used in various industrial equipment and precision instruments. It can achieve high-precision linear motion under high load conditions.

[0049] The linear motor type moving module is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. It has the advantages of simple structure, convenient long stroke, high acceleration, fast response and high precision.

[0050] Position sensor is a sensor that can sense the position of the object being measured and convert it into a usable output signal. It is a sensor that can sense the position of the object being measured and convert it into a usable output signal. It is mainly divided into contact sensors and proximity sensors.

[0051] The contact of the contact sensor is activated by the contact and compression of two objects. Common ones include travel switches and two-dimensional matrix position sensors. The travel switch has a simple structure, reliable operation and low price. When an object touches the travel switch during movement, its internal contact will be activated to complete the control. For example, if the travel switches are installed at both ends of the X, Y, and Z axes of the machining center, the movement range can be controlled. The two-dimensional matrix position sensor is installed on the inside of the robot palm to detect the contact position between itself and an object.

[0052] The proximity sensor is equipped with a proximity switch, which is a switch that can send an "action" signal when an object approaches it to a set distance, without direct contact with the object. There are many types of proximity switches, mainly electromagnetic, photoelectric, differential transformer, eddy current, capacitor, reed switch, Hall, etc. The application of proximity switches on CNC machine tools is mainly tool selection control for tool holders, worktable stroke control, oil cylinder and cylinder piston stroke control, etc.

[0053] In order to make the purpose, technical solutions and advantages of this patent clearer, the implementation method of this patent will be further described in detail below in conjunction with the accompanying drawings.

[0054] like Figure 2 and Figure 3The present invention discloses a reconstituted tobacco leaf drying oven with an anti-falling function, the oven is a baking device for the reconstituted tobacco leaf baking process, and the reconstituted tobacco leaf drying oven is briefly referred to as the "oven" hereinafter, comprising an upper oven 100, a lower oven 200, an upper oven lifting mechanism 300, an anti-falling mechanism 400, an alarm mechanism 500 and a control mechanism 600, the anti-falling mechanism 400 and the upper oven lifting mechanism 300 are connected to the upper oven 100 and the lower oven 200, the alarm mechanism 500 is connected to the upper oven 100, the control mechanism 600 is used for processing electrical signals, the control mechanism 600 is used for controlling the anti-falling mechanism 400 and the alarm mechanism 500, and the control mechanism 600 is arranged next to the lower oven 200.

[0055] The upper oven 100 and the lower oven 200 are assembled from split boxes with upper and lower structures. When the upper oven 100 and the lower oven 200 are closed as a whole, the oven is in working state; when the upper oven 100 and the lower oven 200 are separated into two parts, the oven is in inspection state.

[0056] The upper oven lifting mechanism 300 includes a lifting cylinder 310 and a position sensor 320; the lifting cylinder 310 connects the upper oven 100 and the lower oven 200, separates the upper oven 100 and the lower oven 200, and drives the upper oven 100 to move in the axial direction; the position sensor 320 sends an electrical signal, and the position sensor 320 is arranged on the lifting cylinder 310 and senses the distance moved by the lifting cylinder 310 in the axial direction; the anti-fall mechanism 400 includes a moving module 410 and a support block 420, the moving module 410 receives the electrical signal, and the moving module 410 is used to drive the support block 420 to move in the radial direction; the support block 420 connects the upper oven 100 and the lower oven 200, and is used to maintain the separation of the upper oven 100 and the lower oven 200.

[0057] like Figure 4As shown, the lifting cylinder 310 includes a cylinder seat 311, a cylinder barrel 312, an upper latch 313 and a lower latch 314. The cylinder barrel 312 is a hollow metal cylinder with a smooth and flat interior. There are also pistons, piston rods, seals and valves in the cylinder barrel 312. The piston is a metal cylinder that matches the inner diameter of the cylinder barrel 312 and can slide freely in the cylinder barrel 312. The piston rod is connected to the piston and is connected to the side shell of the upper oven 100 through the piston rod to achieve motion control of the upper oven 100. The seal plays a role in sealing the liquid in the cylinder to ensure the transmission of hydraulic pressure and the normal operation of the lifting cylinder 310. The valve is used to control the flow of liquid to achieve the lifting and pushing of the lifting cylinder 310. The cylinder barrel 312 is installed on the cylinder seat 311. An upper latch 313 is provided on the top of the lifting cylinder 310. The upper latch 313 is connected to the upper oven 100 by threads. A position sensor is provided next to the upper latch 313. A lower latch 314 is provided at the bottom of the lifting cylinder 310. The lower latch 314 is connected to the lower oven 200 by threads. One end of the lifting cylinder 310 is connected to the upper oven 100 and the other end is connected to the lower oven 200. When the baking process is carried out normally, the upper oven 100 and the lower oven 200 are closed. However, when the baking is maintained and repaired, the lifting cylinder 310 will lift the upper oven 100 for a distance to facilitate the maintenance personnel to perform maintenance and inspection operations inside the oven. After the maintenance and inspection operations are completed, the lifting cylinder 310 drives the upper oven 100 to descend so that the oven is closed again.

[0058] like Figure 5 As shown, the moving module 410 drives the support block 420 to move by receiving the signal from the control mechanism 600. After the lifting cylinder 310 opens the upper oven 100, the moving module 410 drives the support block 420 to move to the bottom of the upper oven 100. After the maintenance and inspection work is completed, the support block 420 is moved back to the initial position. Then the lifting cylinder 310 drives the upper oven 100 to descend so that the oven is closed again.

[0059] The warning mechanism 500 includes a support block sensor 510 and an alarm light 520; the support block sensor 510 sends an electrical signal, the support block sensor 510 is arranged at the bottom of the upper oven 100 and is used to detect the existence of the support block 420; the alarm light 520 is arranged at the top of the upper oven 100, and the alarm light 520 warns through a buzzing sound.

[0060] Specifically, in this embodiment, the oven can be divided into the following operating states:

[0061] A1: Working status;

[0062] When the oven is in working state, the oven performs the normal baking process on the reconstituted tobacco leaves, the upper oven 100 and the lower oven 200 are closed as a whole, and the upper oven lifting mechanism 300, the anti-falling mechanism 400 and the alarm mechanism 500 do not need to work.

[0063] A2: Change from working state to inspection state;

[0064] When the oven runs to step A2, the following steps are specifically included:

[0065] S1: The lifting cylinder 310 lifts the upper oven 100 to the position specified by the position sensor 320;

[0066] In step S1, the control mechanism 600 controls the upper oven lifting mechanism 300 to drive the upper oven 100 and the lower oven 200 to separate; the position sensor 320 sends a first electrical signal to the control mechanism 600, and the control mechanism 600 converts the received first electrical signal into a second electrical signal and sends the second electrical signal to the anti-fall mechanism 400. After receiving the second electrical signal, the anti-fall mechanism 400 starts and supports the upper oven 100 to prevent it from falling.

[0067] When the oven is in the process of changing from a working state to an inspection state, the upper oven lifting mechanism 300, the anti-falling mechanism 400 and the alarm mechanism 500 are all in operation. The upper oven lifting mechanism 300 will lift the upper oven 100 for a distance to facilitate maintenance personnel to perform maintenance and inspection work inside the oven. The anti-falling mechanism 400 starts to support the upper oven 100 after the upper oven 100 is lifted, and the alarm mechanism 500 monitors the anti-falling mechanism 400. The upper oven lifting mechanism 300 includes a lifting cylinder 310 and a position sensor 320. The anti-fall mechanism 400 includes a moving module 410 and a support block 420. Specifically, the lifting cylinder 310 is a cylindrical metal part that guides the piston to perform linear reciprocating motion in the cylinder. The air in the engine cylinder converts thermal energy into mechanical energy through expansion, and the gas in the compressor cylinder is compressed by the piston to increase the pressure; at this time, the lifting cylinder 310 displaces the upper oven 100 upward in the axial direction, that is, the separation distance between the upper oven 100 and the lower oven 200 becomes larger and larger. The position sensor 320 is arranged on the lifting cylinder 310. When the lifting cylinder 310 When the cylinder 310 lifts the upper oven 100 to the specified position, it sends a first electrical signal to the control mechanism 600; the control mechanism 600 is used to receive, convert and send various electrical signals, so the control mechanism 600 converts the received first electrical signal into a second electrical signal and sends the second electrical signal to the moving module 410; the moving module 410 that receives the second electrical signal is provided with a support block 420 that displaces in the radial direction, and the moving module 410 drives the support block 420 to immediately move to the bottom of the upper oven 100 to maintain the separation of the upper oven 100 and the lower oven 200 when the lifting cylinder 310 lifts the upper oven 100 to the specified position.

[0068] The warning mechanism 500 includes a support block sensor 510 and an alarm light 520. At this time, the support block sensor 510 is used by maintenance personnel to monitor whether there is a support block 420 between the upper oven 100 and the lower oven 200 when performing maintenance and inspection work. If the support block 420 is not detected within 30 seconds after the upper oven 100 ends its working state, a third electrical signal is sent to the control mechanism 600. The control mechanism 600 converts the received third electrical signal into a fourth electrical signal and sends the fourth electrical signal to the alarm light 520. The alarm light 520 emits a buzzing sound to alert the maintenance personnel.

[0069] S2: The moving module 410 drives the supporting block 420 to support the lifted upper oven 100;

[0070] S3: The support block sensor 510 monitors the existence of the support block 420;

[0071] In step S3, the support block sensor 510 has a response time for monitoring the support block 420. After 30 seconds of the response time, the support block sensor 510 will send a third electrical signal to the control mechanism. The control mechanism converts the received third electrical signal into a fourth electrical signal and sends the fourth electrical signal to the alarm light 520.

[0072] A3: Check status;

[0073] When the oven is in the inspection state, the upper oven 100 and the lower oven 200 are separated into two parts, the anti-fall mechanism 400 and the alarm mechanism 500 continue to operate, and the upper oven 100 and the lower oven 200 are supported by the support block 420, which is convenient for maintenance personnel to perform maintenance and inspection work inside the oven.

[0074] When the oven runs to step A2, if the support block sensor 510 detects that the support block 420 does not exist, the support block sensor 510 controls the alarm light 520 through the control mechanism 600 to issue a warning; and when the oven runs to step A3, if the support block sensor 510 detects that the support block 420 does not exist, the support block sensor 510 controls the alarm light 520 through the control mechanism 600 to issue a warning.

[0075] A4: Change from inspection status to working status;

[0076] When the oven runs to step A4, the control mechanism 600 controls the anti-fall mechanism 400 to drive the upper oven 100 and the lower oven 200 to close.

[0077] Specifically, when the oven is in the process of changing from the inspection state to the working state, the lifting cylinder 310 drives the upper oven 100 to descend so that the upper oven 100 and the lower oven 200 are closed again. The anti-fall mechanism 400 continues to operate. Specifically, at this time, the moving module 410 drives the support block 420 to retract in the radial direction. As the support block 420 is retracted to the initial position, the lifting cylinder 310 moves the upper oven 100 downward in the axial direction, that is, the distance between the upper oven 100 and the lower oven 200 becomes smaller and smaller until the upper oven 100 and the lower oven 200 are closed as a whole.

[0078] In the specification of this patent, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and components of this patent, but these terms are used here only for the purpose of convenience of description and are determined based on the example orientations shown in the drawings. Since the embodiments disclosed in this patent can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0079] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this patent will not further describe various possible combinations.

[0080] In addition, the various implementation methods of this patent can be combined arbitrarily, as long as they do not violate the concept of this patent, they should also be regarded as the contents disclosed by this patent.

Claims

1. A reconstituted tobacco drying oven with an anti-falling function, the reconstituted tobacco drying oven comprising: The upper oven, the lower oven, and the upper oven lifting mechanism are characterized in that the reconstituted tobacco oven also includes an anti-fall mechanism. When the reconstituted tobacco oven is in an inspection state, the upper oven is lifted by the upper oven lifting mechanism and away from the lower oven, and the anti-fall mechanism is activated and used to prevent the upper oven from falling.

2. The reconstituted tobacco drying oven according to claim 1, characterized in that: The upper oven lifting mechanism includes a lifting cylinder and a position sensor; The lifting cylinder is connected to the upper oven and the lower oven, and the position sensor is arranged on the lifting cylinder and is used to send an electrical signal; When the upper oven lifting mechanism is turned on, the lifting cylinder lifts the upper oven in the axial direction and away from the lower oven, and the position sensor senses the position of the upper oven lifted by the lifting cylinder.

3. The reconstituted tobacco drying oven according to claim 2, characterized in that: The lifting cylinder comprises a cylinder seat, a cylinder barrel, an upper latch and a lower latch.

4. The reconstituted tobacco drying oven according to claim 3, characterized in that: The anti-falling mechanism comprises a moving module and a supporting block; The mobile module is used to receive electrical signals, and the support block is used to support the upper oven; When the anti-falling mechanism is turned on, the moving module receives an electrical signal and drives the supporting block to move in a radial direction between the upper oven and the lower oven to prevent the upper oven from falling.

5. The reconstituted tobacco drying oven according to claim 4, characterized in that: The reconstituted tobacco drying oven further comprises an alarm mechanism, which is activated after the anti-fall mechanism is turned on, and comprises a support block sensor and an alarm light; The support block sensor is arranged at the bottom of the upper oven and sends an electrical signal, and the alarm light is arranged at the top of the upper oven; The support block sensor includes a grating; When the warning mechanism is activated, the support block sensor senses the support block. If the support block sensor cannot sense the existence of the support block, the warning light gives a warning through a buzzer sound.

6. The reconstituted tobacco drying oven according to claim 5, characterized in that: The reconstituted tobacco drying oven further comprises a control mechanism, which is used for receiving electrical signals, converting electrical signals and sending electrical signals, and the control mechanism is arranged adjacent to the lower drying oven.

7. The reconstituted tobacco drying oven according to claim 6, characterized in that: When the reconstituted tobacco leaf oven is changed from the working state to the inspection state, the control mechanism controls the upper oven lifting mechanism and the anti-falling mechanism to perform the following steps: S1: The lifting cylinder lifts the upper oven to the position specified by the position sensor; S2: the moving module drives the supporting block to support the lifted upper oven; S3: The support block sensor monitors the existence of the support block.

8. The reconstituted tobacco drying oven according to claim 7, characterized in that: In step S1, the position sensor sends a first electrical signal to the control mechanism, and the control mechanism converts the received first electrical signal into a second electrical signal and sends the second electrical signal to the mobile module.

9. The reconstituted tobacco drying oven according to claim 7, characterized in that: In step S3, the support block sensor has a response time for monitoring the support block. After the response time is exceeded, the grating will send the third electrical signal to the control mechanism. The control mechanism converts the received third electrical signal into a fourth electrical signal and sends the fourth electrical signal to the alarm light.

10. The reconstituted tobacco drying oven according to claim 9, characterized in that: The response time is 16 to 21 s, 21 to 26 s, 26 to 31 s, 31 to 36 s, 36 to 41 s or 41 to 46 s.

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