Reconstituted tobacco drying oven with anti-falling function

Abstract

The utility model relates to the field of reconstituted tobacco production equipment, and provides a reconstituted tobacco drying oven with an anti-falling function, which comprises an upper lifting anti-falling mechanism connected with an upper drying oven and a lower drying oven, and a control mechanism used for processing electric signals and controlling the lifting anti-falling mechanism, a protection mechanism, a distance measuring mechanism and a warning mechanism, an anti-falling function and a warning function are added for the reconstituted tobacco drying oven in an inspection state, so that maintenance personnel are ensured to inspect the drying oven; according to the lifting anti-falling mechanism, the lifting function and the anti-falling function are integrated, when the drying oven is in the inspection state, the lifting anti-falling mechanism jacks the upper drying oven for a certain distance so that maintenance personnel can conveniently conduct maintenance and inspection operation on the interior of the drying oven, the lifting anti-falling mechanism enters the self-locking state after jacking is completed, and therefore falling prevention is conducted; the lifting anti-falling mechanism in the self-locking state can prevent the upper drying oven from falling suddenly to cause accidents when power is cut off suddenly.

Description

Technical Field

[0001] This patent relates to the field of reconstituted tobacco production equipment, specifically to a reconstituted tobacco drying oven with anti-fall function. Background Technology

[0002] Reconstituted tobacco, also known as tobacco sheets, refers to a recycled product made from waste materials such as tobacco stems, dust, and broken tobacco leaves discarded during cigarette manufacturing. It is produced in sheet or filament form and used as a filling material for cigarettes. Reconstituted tobacco plays a crucial role in cigarette production, not only reducing costs but also improving the intrinsic quality of cigarettes. The manufacture of reconstituted tobacco began in the 1950s, primarily using the slurry process, roll pressing, and papermaking process. The papermaking process is further divided into wet and dry papermaking. Compared to the currently produced roll pressing and slurry process reconstituted tobacco, papermaking reconstituted tobacco has unique advantages, including lower density and higher filling value; better mechanical processing resistance and higher filament yield; faster combustion speed and lower tar release; and better product plasticity.

[0003] Curing reconstituted tobacco leaves is a crucial step in the reconstituted tobacco process, and the quality of curing directly affects the quality of the finished tobacco leaves. The basic principle of tobacco curing is to use hot air to dry the tobacco leaves, removing the moisture and thus turning them yellow and dry. Figure 1 As shown, multiple reconstituted tobacco drying ovens work together to bake tobacco sheets during the baking process, improving the efficiency of baking output. Therefore, to ensure the quality of baking, the ovens need to be maintained and inspected frequently. During this process, maintenance personnel typically extend their bodies into the oven for short-term inspections and repairs after the lifting cylinder has raised the oven top. This poses a significant safety hazard, as the oven top could easily fall due to unstable air pressure, sudden power outages, cylinder malfunctions, or other reasons, causing an accident. The production demand for reconstituted tobacco is unstable, with periods of sudden large-scale production as well as long-term shutdowns and assembly line production. Existing reconstituted tobacco drying oven designs only consider short-term cleaning and do not account for long-term shutdowns for maintenance or inspection, or prolonged periods of inactivity (inspection mode) due to process requirements. This significantly increases the risk that the cylinders may not be able to maintain the raised position, or that the oven may fall after being raised. Utility Model Content

[0004] To ensure the safety of maintenance personnel operating reconstituted tobacco drying ovens, improve the safety and stability of the ovens during inspections, and enhance the means of preventing safety accidents, this patent provides the following technical solutions:

[0005] A reconstituted tobacco drying oven with anti-fall function includes: an upper drying oven, a lower drying oven, and a lifting and anti-fall mechanism. The lifting and anti-fall mechanism combines lifting and anti-fall functions. When the reconstituted tobacco drying oven is in inspection mode, the upper drying oven is lifted by the lifting and anti-fall mechanism and moved away from the lower drying oven. The lifting and anti-fall mechanism activates the anti-fall function after the upper drying oven is lifted.

[0006] Furthermore, the lifting and fall protection mechanism includes a first connecting seat, a first connecting member, a second connecting member, and a second connecting seat. The first connecting member and the second connecting member rise or fall in the axial direction, and the first connecting member is partially sleeved on the second connecting member.

[0007] Furthermore, the first connecting seat is used to connect the upper oven and the first connecting piece, and the second connecting seat is used to connect the second connecting piece and the lower oven.

[0008] Furthermore, the first connecting component includes a support block and a trapezoidal nut, the trapezoidal nut having a cylindrical through hole in the middle and trapezoidal threads on the hollow tube wall of the trapezoidal nut; the second connecting component includes a bearing seat and a trapezoidal screw track, with the trapezoidal nut fitted onto the trapezoidal screw track.

[0009] Furthermore, the reconstituted tobacco drying oven also includes a protective mechanism, which includes a first protective component and a second protective component. The first protective component is located at the bottom of the side of the upper drying oven, and the second protective component is located at the top of the side of the lower drying oven. The sides of the upper and lower drying ovens are located on the same side, and the first and second protective components cannot be attached together after being powered on.

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

[0011] Furthermore, the reconstituted tobacco drying oven also includes an alarm mechanism. The alarm mechanism is connected to an independent power supply and is located on the top of the upper drying oven. The alarm mechanism issues an alarm after receiving an electrical signal from the control box.

[0012] Furthermore, the reconstituted tobacco drying oven also includes a distance measuring mechanism, which is activated after the upper drying oven is raised. The distance measuring mechanism is used to measure the distance between the upper and lower drying ovens in real time.

[0013] Furthermore, the ranging mechanism includes a first ranging element and a second ranging element. The first ranging element is disposed at the bottom end of the side of the upper oven, and the second ranging element is disposed at the top end of the side of the lower oven. The sides of the upper and lower ovens are disposed on the same side.

[0014] This patent has the following beneficial effects:

[0015] 1. This patent relates to the field of reconstituted tobacco production equipment, and provides a reconstituted tobacco drying oven with an anti-fall function. It includes an upper lifting anti-fall mechanism connecting the upper and lower drying ovens, and a control mechanism for processing electrical signals and controlling the lifting anti-fall mechanism, protection mechanism, distance measuring mechanism, and alarm mechanism. When the upper and lower drying ovens are separated into two parts, the oven is in an inspection state. This patent adds anti-fall and alarm functions to the reconstituted tobacco drying oven in the inspection state to ensure the personal safety of maintenance personnel inspecting the oven.

[0016] 2. The lifting and anti-fall mechanism in this patent integrates lifting and anti-fall functions. When the oven is in inspection mode, the lifting and anti-fall mechanism will lift the upper oven a certain distance to facilitate maintenance personnel to carry out maintenance and inspection work inside the oven. After lifting is completed, the lifting and anti-fall mechanism enters a self-locking state to prevent falling. The lifting and anti-fall mechanism in the self-locking state can prevent the upper oven from falling suddenly and causing an accident in the event of a sudden power failure.

[0017] 3. The protection and alarm mechanisms of this patent are equipped with independent backup power supplies, which can ensure the safety of maintenance personnel even in the event of power outages or other emergencies; this patent also has a distance measuring mechanism that can measure the distance between the upper and lower ovens in real time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this patent, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this patent and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a process flow diagram for drying multiple reconstituted tobacco leaves in actual production ovens;

[0020] Figure 2 This is a three-dimensional schematic diagram of the reconstructed tobacco drying oven for this patent.

[0021] Figure 3 This is a three-dimensional schematic diagram of the lifting and fall prevention mechanism of this patent.

[0022] The reference numerals in the attached figures are explained as follows:

[0023] 100: Top oven;

[0024] 200: Lower oven;

[0025] 300: Lifting and fall arresting mechanism;

[0026] 310: First connecting seat;

[0027] 320: First connector;

[0028] 321: Support block;

[0029] 322: Trapezoidal nut;

[0030] 330: Second connector;

[0031] 331: Bearing housing;

[0032] 332: Trapezoidal lead screw track;

[0033] 340: Second connecting seat;

[0034] 400: Protection Agency;

[0035] 410: First protective component;

[0036] 420: Second protective component;

[0037] 500: Distance measuring mechanism;

[0038] 510: First rangefinder;

[0039] 520: Second rangefinder;

[0040] 600: Alarm number;

[0041] 700: Control mechanism. Detailed Implementation

[0042] The detailed features and advantages of this patent are described below in the specific embodiments. The content is sufficient to enable any person skilled in the art to understand the technical content of this patent and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, a person skilled in the art can easily understand the related objectives and advantages of this patent.

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

[0044] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not indicate the only possible implementation. The terms "upper," "lower," etc., indicating orientation or positional relationships are defined with reference to the coordinates of the accompanying drawings and are only for the convenience of describing this patent and simplifying the description, 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, and therefore should not be construed as a limitation of this patent. The terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this patent belongs. The terminology used herein in the specification of this patent is for the purpose of describing particular embodiments only and is not intended to be limiting of this patent. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0046] The moving module is an automation upgrade unit following linear guides, linear motion modules, and ball screw linear transmission mechanisms. It can achieve linear and curvilinear motion of the load through the combination of various units, making automation of light loads more flexible and positioning more precise. Moving modules can be divided into three types: synchronous belt type, ball screw type, and linear motor type.

[0047] In a synchronous belt type linear module, the belt is mounted on the drive shafts on both sides of the linear module, serving as the power input shaft. A slider for adding workpieces is fixed to the belt; when input is received, the slider moves by driving the belt. Typically, synchronous belt type linear modules are specifically designed to allow control of belt tension on one side, facilitating equipment adjustments during production. Rigid guide rails can be added to increase the rigidity of the linear module to meet different load requirements. Different specifications of linear modules have different load limits. The accuracy of a synchronous belt type linear module depends on the quality of the belt and the machining process during assembly; the control of the power input also affects its accuracy.

[0048] Ball screw type moving modules are ideal products for converting rotary motion into linear motion, or vice versa. A ball screw consists of a screw, a nut, and balls. Its function is to convert rotary motion into linear motion, representing a further extension and development of the ball screw. The significant advancement of this development lies in changing the bearing's motion from rolling to sliding. Due to its very low frictional resistance, ball screws are widely used in various industrial equipment and precision instruments. They can achieve high-precision linear motion under high loads.

[0049] A position sensor is a sensor that detects the position of a measured object and converts it into a usable output signal. It is mainly divided into contact sensors and proximity sensors.

[0050] Contact sensors operate by the contact and pressure of two objects. Common examples include limit switches and two-dimensional matrix position sensors. Limit switches are simple in structure, reliable in operation, and inexpensive. When an object moves and encounters a limit switch, its internal contacts activate, thus controlling the movement. For example, installing limit switches at both ends of the X, Y, and Z axes of a machining center allows for control of the movement range. Two-dimensional matrix position sensors are installed inside the palm of a robotic arm to detect the contact position between the arm and an object.

[0051] Proximity sensors are equipped with proximity switches, which are switches that emit an "action" signal when an object approaches within a set distance, without requiring direct contact with the object. There are many types of proximity switches, mainly including electromagnetic, photoelectric, differential transformer, eddy current, capacitive, reed switch, and Hall effect switches. In CNC machine tools, proximity switches are primarily used for tool selection control, table travel control, and piston travel control for hydraulic and pneumatic cylinders.

[0052] A laser displacement sensor is a sensor that uses laser technology for measurement. It consists of a laser, a laser detector, and a measurement circuit. Laser sensors are a new type of measuring instrument capable of accurately and non-contactly measuring changes in the position and displacement of an object. Based on their measurement principles, laser displacement sensors are classified into two methods: laser triangulation and laser echo analysis. Laser triangulation is generally suitable for high-precision, short-distance measurements, while laser echo analysis is used for long-distance measurements.

[0053] To make the objectives, technical solutions, and advantages of this patent clearer, the embodiments of this patent will be described in further detail below with reference to the accompanying drawings.

[0054] like Figure 2As shown, a reconstituted tobacco drying oven with a fall prevention function is disclosed. The oven is a drying device in the reconstituted tobacco drying process, referred to below as the "oven". It includes an upper oven 100, a lower oven 200, a lifting and fall prevention mechanism 300, a protection mechanism 400, a distance measuring mechanism 500, an alarm mechanism 600, and a control mechanism 700. The upper oven 100 and the lower oven 200 are two cubic structures of the same shape and size, symmetrically arranged along the axial direction. The upper oven 100 and the lower oven 200 each include two smaller side surfaces and two larger side surfaces. When the oven is in operation, the bottom surfaces of the upper oven 100 and the lower oven 200 are in close contact. When the oven is in inspection mode, the bottom surface of the upper oven 100 separates from the bottom surface of the lower oven 200, separating the two ovens into two parts. The height difference between the two ovens facilitates maintenance and inspection by maintenance personnel. The lifting and fall-prevention mechanism 300 connects the upper oven 100 and the lower oven 200. The warning mechanism 600 connects to the upper oven 100. The protection mechanism 400, the lifting and fall-prevention mechanism 300, and the ranging mechanism 500 are located on the larger side of the upper oven 100 and the lower oven 200, with both sides on the same side. The protection mechanism 400 and the ranging mechanism 500 are located at the junction of the upper oven 100 and the lower oven 200. The control mechanism 700 is used to process electrical signals. Specifically, the control mechanism 700 is the central hub for receiving, converting, and transmitting electrical signals. The control mechanism 700 is used to control the lifting and fall-prevention mechanism 300, the protection mechanism 400, the ranging mechanism 500, and the warning mechanism 600. The control mechanism 700 is located outside the upper oven 100 and the lower oven 200. Specifically, the control mechanism 700 is located next to the larger side of the lower oven on the same side.

[0055] like Figure 3As shown, the lifting and fall-prevention mechanism 300 includes a first connecting seat 310, a first connecting member 320, a second connecting member 330, and a second connecting seat 340. Specifically, this embodiment provides two lifting and fall-prevention mechanisms 300, which are symmetrically distributed along the axial direction on both sides of the protection mechanism 400. The first connecting seat 310 is an "L"-shaped high-strength alloy gasket. The first connecting seat 310 is located at the bottom end of the side of the upper oven 100 and is used to connect the upper oven 100 and the first connecting member 320. The second connecting seat 340 is a "T"-shaped elongated protrusion. In addition to its supporting and fixing function, the second connecting seat 340 also has the function of receiving and responding to electrical signals. The second connecting seat 340 is located at the bottom end of the side of the lower oven 200 and is used to connect the second connecting member 330 and the lower oven 200. The first connecting member 320 is partially fitted onto the second connecting member 330. Specifically, the first connecting member 320 includes a support block 321 and a trapezoidal nut 322. The trapezoidal nut 322 has a cylindrical through hole in the middle, and a trapezoidal thread is provided on the hollow tube wall of the trapezoidal nut 322. The second connecting member 330 includes a bearing seat 331 and a trapezoidal screw track 332. The trapezoidal screw track 332 is a long bar structure and is arranged along the axial direction. One end is fixed to the top of the side of the lower oven 200 through the bearing seat 331, and the other end is fixed to the second connecting seat 340. The trapezoidal thread is provided on the bar wall of the trapezoidal screw track 332. The trapezoidal thread on the trapezoidal nut 322 matches the trapezoidal thread on the trapezoidal screw track 332. The trapezoidal nut 322 is fitted onto the trapezoidal screw track 332. The first connecting member 320 and the second connecting member 330 rise or fall along the axial direction. The trapezoidal nut 322 is located at the bottom of the support block 321 and is fixedly connected to the support block 321. The top surface of the support block 321 is fixedly connected to the first connecting seat 310. The top of the trapezoidal screw track 332 is fixedly connected to the bearing seat 331. The bottom of the trapezoidal screw track 332 is fixedly connected to the second connecting seat 340. When the second connector 330 receives the upward electrical signal transmitted from the control center, the trapezoidal nut 322, in conjunction with the trapezoidal thread on the trapezoidal screw track 332, rises axially, and the support block 321 rises synchronously. When the top of the trapezoidal nut 322 touches the bearing seat 331, it stops rising. At this time, the upper oven 100 and the lower oven 200 are separated. The upper oven 100 is raised by a fixed distance, which is equal to the height of the trapezoidal screw track 332. After the upper oven 100 is raised, the lifting anti-fall mechanism 300 enters a self-locking state. Before receiving the downward electrical signal transmitted from the second connector 340, the lifting anti-fall mechanism 300 remains in a self-locking state. In the self-locking state, the trapezoidal nut 322 is fixed on the trapezoidal screw track 332 and cannot move, thus preventing a fall. It is easy to understand that at this time, the upper oven 100 remains separated from the lower oven 200, that is, it is continuously in the inspection state.

[0056] The lifting and fall protection mechanism 300 is a type of mobile module. Its self-locking property is a characteristic of mechanical transmission, enabling the conversion of rotary motion into linear motion. One or both ends of the trapezoidal lead screw track 332 are fixed axially, and a motor drives its rotation. The trapezoidal nut 322 moves along the axis of the trapezoidal lead screw track 332. The movement between the trapezoidal nut 322 and the trapezoidal lead screw track 332 relies entirely on mechanical contact to generate sliding friction. This sliding friction generates a large amount of heat, thus limiting the speed of the lifting and fall protection mechanism 300. Its maximum speed generally does not exceed 3000 RPM. Theoretically, when the lead screw transmission efficiency is greater than 50%, there is no self-locking property; only when the transmission efficiency is less than 35% does self-locking occur.

[0057] Specifically, the lead angle is mainly determined by the design of the thread assembly and the friction characteristics. The lead angle is the angle formed by the distance the trapezoidal nut 322 moves along its axis when the trapezoidal thread rotates one revolution and the diameter of the trapezoidal thread on the trapezoidal screw track 332; the friction angle is determined by the coefficient of friction. When the lead angle is smaller than the friction angle, the axial movement of the trapezoidal nut 322 cannot overcome the resistance caused by friction, thus achieving self-locking. That is, the smaller the lead and the smaller the lead angle, the stronger the self-locking. The lifting and anti-fall mechanism 300 transmits motion through sliding friction. Unlike rolling friction, sliding friction is greater than rolling friction, making it easier to achieve self-locking.

[0058] Self-locking means that the trapezoidal nut 322 will not slide or rotate in the opposite direction along the trapezoidal lead screw track 332 when no external force is applied, thus maintaining the position of the load. Even in the event of a power outage, due to the self-locking property of the lifting anti-fall mechanism 300, the trapezoidal nut 322 remains in its original position and will not slip down, ensuring the safety of maintenance personnel.

[0059] In terms of materials, trapezoidal lead screw rails 332 are generally made of stainless steel or alloy steel; while trapezoidal nuts 322 can be made of either metallic or non-metallic materials. Specifically, for low loads, low-friction, high-temperature resistant synthetic engineering materials are generally used, such as nylon, acetal, polyetheretherketone (PEEK), fully aromatic polyimide resin (VESPEL), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), Teflon (PTFE), and high-performance thermoplastic self-lubricating bearing materials Turcite A and Turcite X; for high loads, copper can be selected.

[0060] Specifically, the fall-prevention function of the lifting and anti-fall mechanism 300 relies entirely on the sliding friction generated by mechanical contact, based on the forward movement of the trapezoidal nut 322 along the trapezoidal thread on the trapezoidal screw track 332. In particular, in the event of a power outage, due to its self-locking characteristic, the trapezoidal nut 322 remains in its original position and will not slip. Because of the sliding friction, it cannot move in the reverse direction, thus achieving a self-locking fall-prevention effect. In this embodiment, the trapezoidal screw track 332 is made of alloy steel, and the trapezoidal nut 322 is a low-friction, high-heat-resistant composite engineering material of PEEK and PTFE.

[0061] After completing the maintenance and inspection work, the control mechanism 700 sends a descent electrical signal to the second connector 330. The second connector 330 responds to the electrical signal and, under the action of the first connecting seat 310, applies a force to the trapezoidal nut 322, causing the trapezoidal nut 322 to descend along the axial direction according to the trapezoidal thread on the trapezoidal screw track 332 until the bottom surface of the trapezoidal nut 322 contacts the top of the second connector 330 and stops moving. It is easy to understand that at this time, the upper oven 100 and the lower oven 200 are closed as a whole.

[0062] The protection mechanism 400 is used to further prevent the upper oven 100 from falling. The power supply of the protection mechanism 400 adopts a separate backup power supply. The protection mechanism 400 includes a first protective element 410 and a second protective element 420. The first protective element 410 is located at the bottom end of the side of the upper oven 100, and the second protective element 420 is located at the top end of the side of the lower oven 200. The side of the upper oven 100 and the side of the lower oven 200 are located on the same side. The first protective element 410 and the second protective element 420 cannot stick together after being powered on. Specifically, when the oven is in operation, the first protective element 410 and the second protective element 420 are de-energized. At this time, the first protective element 410 and the second protective element 420 are located in the middle of the side and are in close contact with each other. When the oven is in inspection mode, when the protection mechanism 400 receives the electrical signal from the control mechanism 700, the first protective element 410 and the second protective element 420 are energized with each other. After being energized, the first protective element 410 and the second protective element 420 cannot be in close contact. It is easy to understand that even if the upper oven 100 breaks through the self-locking property and falls, the repulsive force of the first protective element 410 and the second protective element 420 will slow down the falling speed of the upper oven 100, thereby further reducing the damage caused by the fall.

[0063] Specifically, the first protective element 410 and the second protective element 420 can be electromagnets.

[0064] The distance measuring mechanism 500 is activated after the upper oven 100 is raised. The distance measuring mechanism 500 measures the distance between the upper oven 100 and the lower oven 200 in real time and converts it into an electrical signal, which is then sent to the control mechanism 700. The distance measuring mechanism 500 includes a first distance measuring element 510 and a second distance measuring element 520. The first distance measuring element 510 is located at the bottom end of the side of the upper oven 100, and the second distance measuring element 520 is located at the top end of the side of the lower oven 200. The sides of the upper oven 100 and the lower oven 200 are located on the same side. In this embodiment, the first distance measuring element 510 and the second distance measuring element 520 are located on the left side of the sides of the upper oven 100 and the lower oven 200, along the corners. When the oven is in operation, the first measuring element 510 and the second measuring element 520 are in contact; when the oven is in inspection mode, the first measuring element 510 and the second measuring element 520 are separated. At this time, the measuring mechanism 500 starts and measures the distance between the upper oven 100 and the lower oven 200 in real time. The measuring mechanism 500 converts the measured distance into an electrical signal and sends it to the control mechanism 700. Specifically, the measuring mechanism 500 can be a laser displacement sensor.

[0065] The alarm mechanism 600 is powered by a separate backup power supply and can be an alarm light. The alarm mechanism 600 is connected to an independent power supply and is installed on the top of the upper oven 100. The alarm mechanism 600 will issue an alarm after receiving an electrical signal from the control box.

[0066] The control mechanism 700 is used to receive, convert, and transmit electrical signals. The control mechanism 700 is located outside the upper oven 100 and the lower oven 200. The control mechanism 700 contains a main power supply and two independent backup power supplies. The alarm mechanism 600 and the protection mechanism 400 are used for the independent backup power supplies.

[0067] Specifically, in this embodiment, the oven can be divided into the following operating states:

[0068] A1: Working status;

[0069] When the oven is in operation, it 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 lifting and anti-fall mechanism 300, the protection mechanism 400, the ranging mechanism 500 and the warning mechanism 600 do not need to work.

[0070] A2: Switching from working status to inspection status;

[0071] After receiving the electrical signal from the control mechanism 700, the lifting and anti-fall mechanism 300 lifts until the top of the trapezoidal nut 322 abuts against the bearing seat 331 and then stops moving. After stopping, the lifting and anti-fall mechanism 300 enters a self-locking state.

[0072] A3: Check status;

[0073] When the oven is under inspection, the upper oven 100 and lower oven 200 are separated into two parts. The lifting and anti-fall mechanism 300 and the distance measuring mechanism 500 operate continuously, while the protection mechanism 400 and the alarm mechanism 600 are ready to operate. The upper oven 100 and lower oven 200 are supported by the lifting and anti-fall mechanism 300, facilitating maintenance personnel to perform maintenance and inspection work inside the oven. The distance measuring mechanism 500 measures the distance in real time and converts it into an electrical signal, which is then sent to the control mechanism 700. If the measured distance changes, the control mechanism 700 sends an electrical signal to the protection mechanism 400 and the alarm mechanism 600.

[0074] A4: Transition from inspection status to working status;

[0075] When the oven reaches step A4, the control mechanism 700 sends a descending electrical signal to the second connector 330. The second connector 330 responds to the electrical signal and, under the action of the first connecting seat 310, applies a force to the trapezoidal nut 322, causing the trapezoidal nut 322 to descend along the axial direction according to the trapezoidal thread on the trapezoidal screw track 332 until the bottom surface of the trapezoidal nut 322 contacts the top of the second connector 330 and stops moving. It is easy to understand that at this time, the upper oven 100 and the lower oven 200 are closed into a whole.

[0076] This patent specification uses directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom" to describe various example structural parts and components of this patent. However, the use of these terms is merely for illustrative purposes and is based on the orientation of the examples shown in the accompanying drawings. Since the embodiments disclosed in this patent can be arranged in different orientations, these directional terms are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or the same as the direction of gravity.

[0077] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this patent will not describe the various possible combinations separately.

[0078] Furthermore, various implementations of this patent can be combined in any way, and as long as they do not violate the spirit of this patent, they should also be regarded as the content disclosed in this patent.

Claims

1. A reconstituted tobacco oven with a fall protection function, the reconstituted tobacco oven comprising: The upper oven, the lower oven and the lifting and anti-falling mechanism, characterized in that the lifting and anti-falling mechanism comprises a lifting function and an anti-falling function, when the reconstituted tobacco oven is in an inspection state, the upper oven is lifted away from the lower oven by the lifting and anti-falling mechanism, and the lifting and anti-falling mechanism starts the anti-falling function after the upper oven is lifted.

2. The reconstituted tobacco leaf oven of claim 1, wherein, The lifting and anti-falling mechanism comprises a first connecting seat, a first connecting piece, a second connecting piece and a second connecting seat, the first connecting piece and the second connecting piece ascend or descend in the axial direction, and the first connecting piece is partially sleeved on the second connecting piece.

3. The reconstituted tobacco leaf oven of claim 2, wherein, The first connecting seat is used for connecting the upper oven and the first connecting piece, and the second connecting seat is used for connecting the second connecting piece and the lower oven.

4. The reconstituted tobacco leaf oven of claim 2, wherein, The first connecting piece comprises a supporting block and a trapezoidal nut, the trapezoidal nut is provided with a cylindrical through hole in the middle, and the hollow pipe wall of the trapezoidal nut is provided with a trapezoidal thread; The second connecting piece comprises a bearing seat and a trapezoidal screw rod track, and the trapezoidal nut is sleeved on the trapezoidal screw rod track.

5. The reconstituted tobacco leaf oven of claim 1, wherein, The reconstituted tobacco oven further comprises a protection mechanism, the protection mechanism comprises a first protection piece and a second protection piece, the first protection piece is arranged at the bottom end of the side surface of the upper oven, the second protection piece is arranged at the top end of the side surface of the lower oven, the side surface of the upper oven and the side surface of the lower oven are arranged on the same side, and the first protection piece and the second protection piece cannot be attached after being electrified.

6. The reconstituted tobacco leaf oven of claim 1, wherein, The reconstituted tobacco oven further comprises a control mechanism, the control mechanism is used for receiving, converting and sending electric signals, and the control mechanism is arranged adjacent to the lower oven.

7. The reconstituted tobacco leaf oven of claim 6, wherein, The reconstituted tobacco oven further comprises a warning mechanism, the warning mechanism is connected with an independent power supply and arranged at the top of the upper oven, and the warning mechanism gives a warning after receiving the electric signal of the control mechanism.

8. The reconstituted tobacco leaf oven of claim 1, wherein, The reconstituted tobacco oven further comprises a distance measuring mechanism, the distance measuring mechanism is started after the upper oven is lifted, and the distance measuring mechanism is used for measuring the distance between the upper oven and the lower oven in real time.

9. The reconstituted tobacco leaf oven of claim 8, wherein, The distance measuring mechanism comprises a first distance measuring piece and a second distance measuring piece, the first distance measuring piece is arranged at the bottom end of the side surface of the upper oven, and the second distance measuring piece is arranged at the top end of the side surface of the lower oven, and the side surface of the upper oven and the side surface of the lower oven are arranged on the same side.

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