Dynamic time-varying drying system of tunnel furnace

Abstract

The invention relates to a dynamic time-varying drying system of a tunnel furnace, which comprises a conveying unit arranged in a feeding area, a drying area and a discharging area in a penetrating manner, and a plurality of stations are arranged on the conveying unit and used for placing materials fed by the feeding area; the system has a first working stage and a second working stage which are arranged in a staggered and replaced mode, and in the first working stage, the conveying unit is controlled to drive the station to move to the next station and then stop moving for preset time T1, and then the conveying unit continues to drive the station to move to the next station again; in the second working stage, the conveying unit is controlled to drive the station to stop moving for preset time T2; within the preset time T1 of the first working stage of odd number times, the picking unit is controlled to grab materials at the stations of odd number positions in the drying area and separate the materials to the stations; a picking unit is controlled to place the grabbed materials located at the even number of stations in the drying area on the stations; therefore, the problems existing when an existing tunnel furnace adopts a chain to conduct conveying at equal intervals are solved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel furnaces, and in particular to a dynamic time-varying drying system of a tunnel furnace. Background Art

[0002] The tunnel furnace is a tunnel-type mechanical equipment that heats and bakes products through heat conduction, convection and radiation. The tunnel furnace body is relatively long, with the shortest being 6 meters and the longest being 60-80 meters. The baking chamber is a narrow tunnel with a width of between 80cm and 140cm. There is a continuously running chain conveyor in the heating chamber. When the product is heated and baked, the product moves relative to the electric heating element or direct-fired combustion rod through the conveyor chain plate, steel belt or mesh belt. Thus, uniform baking and conveying are completed. This type of oven can be produced continuously, with high production efficiency, labor saving and stable baking quality. This tunnel furnace is mainly used in industrialized product enterprises, characterized by large-scale continuous or intermittent baking.

[0003] The existing multi-station step-type tunnel furnace uses chain equidistant transmission, and the spacing between products must be greater than the sum of the thickness of the furnace wall and the door. The advantages are simple structure and stable transmission; the disadvantages are large product spacing and low furnace space utilization; at the same time, when the furnace temperature is high and the furnace wall is thick, the product spacing increases, and when there are more stations, the furnace body is very long, which not only occupies a large area, but also has high energy consumption. Summary of the invention

[0004] In order to solve the problems of large product spacing and low space utilization in the existing tunnel furnace when chain equidistant transmission is adopted, resulting in a long furnace body, large floor space and high energy consumption, the present invention provides a dynamic time-varying drying system for a tunnel furnace.

[0005] In a first aspect, the present invention provides a dynamic time-varying drying system for a tunnel furnace, comprising: A feeding area, a drying area, a discharging area, a conveying unit and a picking unit. The conveying unit is arranged throughout the feeding area, the drying area and the discharging area. A plurality of workstations are arranged on the conveying unit. The workstations are used to place the materials fed from the feeding area. The conveying unit is used to sequentially convey the materials on the workstations in the feeding area to the drying area and the discharging area. The dynamic time-varying drying system also has a first working stage and a second working stage, the first working stage and the second working stage are arranged in a staggered replacement manner, the first working stage is to control the conveying unit to drive the station to move to the next station and then stop moving for a preset time T1, and then continue to drive the station to move to the next station again; the second working stage is to control the conveying unit to drive the station to stop moving for a preset time T2, and the preset time T2 is greater than the preset time T1; Among them, within the preset time T1 of the first working stage of an odd number, the picking unit is controlled to grab the material in the first material workstation area and detach from the workstation; the picking unit is controlled to place the material grabbed in the second material workstation area on the workstation; the first material workstation area includes a number of the workstations in the drying area located at odd-numbered positions, the second material workstation area includes a number of the workstations in the drying area located at even-numbered positions, and the conveying unit has a zero workstation between the feeding area and the drying area.

[0006] In some embodiments, the dynamic time-varying drying system also includes: when in the preset time T1 of the even-numbered first working stage, controlling the picking unit to grab the material in the second material workstation area and leave the workstation; controlling the picking unit to place the material grabbed from the first material workstation area on the workstation.

[0007] In some embodiments, there are at least two workstations between two adjacent workstations where the materials are placed in the feeding area.

[0008] In some embodiments, a frame is further included, on which a box is disposed, an inlet and an outlet are formed on opposite sides of the box, the conveying unit is located between the frame and the box, one end of the conveying unit passes through the inlet and is exposed outside the box to form the feeding area, and the other end of the conveying unit passes through the outlet and is exposed outside the box to form the discharging area, and the drying area is formed between the inside of the box.

[0009] In some embodiments, the conveying unit has a driving motor, two transmission arms, two chains and a plurality of material frames, the two transmission arms are movably arranged at opposite ends of the frame, the two transmission arms can rotate relative to the frame, and transmission wheels are fixed on opposite sides of each transmission arm, the transmission wheels arranged in opposition between the two transmission arms are meshed and connected through the chain, a plurality of material frames are arranged on the two chains at intervals, a geared wheel is also fixed on one of the transmission arms, the driving motor is fixed on the frame, and the output shaft of the driving motor is meshed and connected with the geared wheel; Among them, the plurality of material frames and the plurality of workstations are arranged in a one-to-one correspondence.

[0010] In some embodiments, the picking unit is disposed inside the box, and the picking unit is provided with a group of claws corresponding to each of the workstations located in the drying area, and each group of claws is used to grab the material frame provided corresponding to the workstation.

[0011] In some embodiments, the picking unit further comprises two mechanical arms and two picking racks, the two mechanical arms are fixed inside the box body and respectively fixed on the inner side walls on both sides of the box body, the two picking racks are respectively installed at the lower end of one of the mechanical arms, the lower ends of the two picking racks are both provided with a plurality of horizontal axes arranged parallel to the transmission arms, the plurality of horizontal axes of the two picking racks are arranged in an interval and staggered manner along the feeding direction of the conveying unit, and a group of the clamping claws are installed at opposite ends of each of the horizontal axes; A first mounting part is slidably mounted on the horizontal axis, and one of the claws in the group is disposed at the lower end of the first mounting part; a second mounting part is slidably mounted on the horizontal axis, and another of the claws in the group is disposed at the lower end of the second mounting part; a first driving component is used to control the first mounting part or the second mounting part to move closer to or farther away from each other; a second driving component is used to control the picking frame to move closer to or farther away from the chain.

[0012] In order to solve the problems of large product spacing and low space utilization in the existing tunnel furnace when using chain equidistant transmission, resulting in a long furnace body, large floor space and high energy consumption, the present invention has the following advantages: Through the technical solution of the present invention, within the preset stop movement time T1 of the first working stage in an odd number, the picking unit is controlled to grab the material in the first material station area and detach from the station; the picking unit is controlled to place the material that has been grabbed in the second material station area on the station, and then the conveying unit is driven to move to the next station again during the first working stage, so that part of the material detaches from the station to utilize the space in the drying area of ​​the tunnel furnace to realize baking in the second working stage. Therefore, the length of the tunnel furnace can be greatly shortened, the space utilization rate can be improved and the energy consumption can be reduced, so as to solve the problem of the furnace body being too long when the number of stations is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention shows a schematic diagram of the principle of a dynamic time-varying drying system of a tunnel furnace. DETAILED DESCRIPTION

[0014] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0015] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0016] This embodiment discloses a tunnel furnace dynamic time-varying drying system. Figure 1 As shown, the dynamic time-varying drying system of the tunnel furnace includes: A feeding area, a drying area, a discharging area, a conveying unit and a picking unit. The conveying unit is arranged throughout the feeding area, the drying area and the discharging area. A plurality of workstations are arranged on the conveying unit. The workstations are used to place the materials fed from the feeding area. The conveying unit is used to sequentially convey the materials on the workstations in the feeding area to the drying area and the discharging area. The dynamic time-varying drying system also has a first working stage and a second working stage, the first working stage and the second working stage are arranged in a staggered replacement manner, the first working stage is to control the conveying unit to drive the station to move to the next station and then stop moving for a preset time T1, and then continue to drive the station to move to the next station again; the second working stage is to control the conveying unit to drive the station to stop moving for a preset time T2, and the preset time T2 is greater than the preset time T1; Among them, within the preset time T1 of the first working stage of an odd number, the picking unit is controlled to grab the material in the first material workstation area and detach from the workstation; the picking unit is controlled to place the material grabbed in the second material workstation area on the workstation; the first material workstation area includes a number of the workstations in the drying area located at odd-numbered positions, the second material workstation area includes a number of the workstations in the drying area located at even-numbered positions, and the conveying unit has a zero workstation between the feeding area and the drying area.

[0017] In this embodiment, a dynamic time-varying drying system for a tunnel furnace is provided. When the dynamic time-varying drying system is within the preset stop movement time T1 of the odd-numbered first working stage, the picking unit is controlled to grab the material in the first material station area and detach it to the station; the picking unit is controlled to place the material in the second material station area that has been grabbed on the station, and then the conveying unit is driven to move to the next station again in the first working stage, so that part of the material is detached from the station to use the space in the drying area of ​​the tunnel furnace to achieve baking in the second working stage; at the same time, the remaining part of the material in the drying area is located on the station of the conveying unit to achieve baking in the second working stage. When the second working stage ends, the dynamic time-varying drying system continues to control the conveying unit to implement the material station adjustment mode of the first working stage again and continue to implement baking in the second working stage, and the arrangement is repeatedly staggered and replaced in sequence, so that the material in the drying area is sent to the discharge area after the baking time is completed. Therefore, when the baking materials and the baking time of each material are determined, the dynamic time-variable drying system can improve the space utilization rate and significantly shorten the length of the tunnel furnace by utilizing the working mode of staggered replacement of the first working stage and the second working stage. The energy consumption of the tunnel furnace during operation can be reduced due to the shortened length of the tunnel furnace, thereby solving the problem of the furnace body being too long when the number of workstations in the tunnel furnace is large.

[0018] In some embodiments, the dynamic time-varying drying system also includes: when in the preset time T1 of the even-numbered first working stage, controlling the picking unit to grab the material in the second material workstation area and leave the workstation; controlling the picking unit to place the material grabbed from the first material workstation area on the workstation.

[0019] Furthermore, there are at least two workstations between two adjacent workstations where the materials are placed in the feeding area. In the present application, there are preferably two empty workstations between two adjacent workstations where materials are placed in the feeding area, and it can also be three empty workstations, or four empty workstations or more empty workstations, and the present application is not limited thereto.

[0020] In this embodiment, through the above-mentioned control method, when the dynamic time-varying drying system is located within the preset stop movement time T1 of the even-numbered first working stage, the picking unit is controlled to grab the material in the second material workstation area and leave the workstation; the picking unit is controlled to place the material that has been grabbed in the first material workstation area on the workstation, and then continue to drive the conveying unit to move to the next workstation in the first working stage, so that the materials in the drying area are replaced again, so that more materials are separated from the workstation to utilize the space in the tunnel furnace drying area to realize baking in the second working stage; the baking efficiency is improved, and the length of the tunnel furnace is further shortened.

[0021] In some embodiments, the dynamic time-varying drying system applied to the tunnel furnace also includes a frame, a box is arranged on the frame, an inlet and an outlet are formed on opposite sides of the box, the conveying unit is located between the frame and the box, one end of the conveying unit passes through the inlet and is exposed outside the box to form the feeding area, and the other end of the conveying unit passes through the outlet and is exposed outside the box to form the discharging area, and the drying area is formed between the inside of the box.

[0022] Furthermore, the conveying unit comprises a driving motor, two transmission arms, two chains and a plurality of material frames, the two transmission arms are movably arranged at the opposite ends of the frame, the two transmission arms can rotate relative to the frame, the opposite sides of each transmission arm are fixed with transmission wheels, the transmission wheels arranged in opposition between the two transmission arms are meshed and connected through the chains, a plurality of material frames are arranged on the two chains at intervals, a geared wheel is also fixed on one of the transmission arms, the driving motor is fixed on the frame, and the output shaft of the driving motor is meshed and connected with the geared wheel; Among them, the plurality of material frames and the plurality of workstations are arranged in a one-to-one correspondence.

[0023] Furthermore, the picking unit is arranged inside the box body, and the picking unit is provided with a group of claws corresponding to each of the workstations located in the drying area, and each group of claws is used to grab the material frame provided corresponding to the workstation.

[0024] Furthermore, the picking unit also includes two mechanical arms and two picking racks, the two mechanical arms are fixed inside the box body and are respectively fixed on the inner side walls on both sides of the box body, the two picking racks are respectively installed on the lower end of one of the mechanical arms, the lower ends of the two picking racks are both provided with a plurality of horizontal axes arranged parallel to the transmission arms, the plurality of horizontal axes of the two picking racks are arranged in an interval and staggered manner along the feeding direction of the conveying unit, and a group of the clamping claws are installed at opposite ends of each of the horizontal axes; A first mounting part is slidably mounted on the horizontal axis, and one of the claws in the group is disposed at the lower end of the first mounting part; a second mounting part is slidably mounted on the horizontal axis, and another of the claws in the group is disposed at the lower end of the second mounting part; a first driving component is used to control the first mounting part or the second mounting part to move closer to or farther away from each other; a second driving component is used to control the picking frame to move closer to or farther away from the chain.

[0025] In this embodiment, the dynamic time-varying drying system is applied to a tunnel furnace, so that the dynamic time-varying drying system has a frame, which is used to be placed in a workplace to realize the bearing box (i.e., the main body of the tunnel furnace), and the two chains of the conveying unit (i.e., the chain conveyor of the tunnel furnace) are arranged along the entrance and exit of the opposite sides of the box, so that the two chains are respectively meshed on the transmission wheels arranged in a counterposition between the two transmission arms on both sides of the frame, and one of the transmission arms is provided with a geared wheel, which is meshed and connected with the driving motor fixed on the frame, so that the driving motor drives the transmission arm to rotate, and the transmission arm drives the other transmission arm to rotate through two years, so as to drive the several material frames placed on the two chains to be sequentially sent to the drying area and the discharging area along the feeding area of ​​the dynamic time-varying drying system. In this application, several material frames are arranged on two chains at intervals, so that each material frame is a work station. Among them, the plurality of material frames are preferably 23, including 8 feeding areas, 11 drying areas, 2 discharging areas, 1 inlet of the box, i.e., a zero station, and 1 outlet of the box.

[0026] Furthermore, a picking unit is fixed inside the box, and the picking unit includes two mechanical arms, two picking racks and several pairs of claws. The two mechanical arms are respectively fixed on the inner side walls on opposite sides of the box, and the two mechanical arms are respectively extended on the side where one of the chains is located; the bottom (i.e., the lower end) of each mechanical arm is equipped with a picking rack arranged along the feeding direction of the conveying unit, i.e., the extension direction of the chain, and several horizontal axes are arranged along the extension direction perpendicular to the picking rack, so that the extension direction of the several horizontal axes is arranged parallel to the extension direction of the transmission arm. The several horizontal axes located on the two picking racks are arranged in an interval and staggered manner, so that the several horizontal axes on one of the picking racks are opposite to the several material frames, i.e., the workstations, located at the odd positions of the drying area, and the preferred number in this application is 6; the several horizontal axes on the other picking rack are opposite to the several material frames, i.e., the workstations, located at the even positions of the drying area, and the preferred number in this application is 5.

[0027] Furthermore, each robot arm is also provided with a second driving assembly, which includes a second cylinder and a second push plate. The main body of the second cylinder is fixed to the robot arm, the output portion of the second cylinder is fixedly connected to the second push plate in the vertical direction, and the other end of the second push plate is fixedly connected to the pickup frame. In the present application, the second push plate can be driven to move by the second cylinder, thereby driving the pickup frame to move closer to or away from the chain.

[0028] Furthermore, a first mounting portion and a second mounting portion are slidably mounted at opposite ends of each horizontal axis, a claw is provided at the lower end of the first mounting portion, and another claw is provided at the lower end of the second mounting portion, and the two claws form a group to complete the grabbing of the material frame at the corresponding position, thereby realizing the detachment of the material loaded in the material frame to the workstation of the conveying unit. In the present application, a first driving machine assembly is arranged on the horizontal axis, and the first driving assembly includes two first cylinders and two first push plates, the main bodies of the two first cylinders are fixed on the horizontal axis, and the output parts of the two first cylinders are arranged facing each other in the horizontal direction, so that the output parts of the two first cylinders are fixedly connected to one of the first push plates, and the other ends of the two first push plates are respectively used to fix the first mounting portion and the second mounting portion, thereby realizing the first driving assembly for controlling the first mounting portion or the second mounting portion to approach or move away from each other, so as to realize the grabbing or releasing of the material frame.

[0029] In other embodiments other than this embodiment, the pickup unit may also be a lifting mechanism, which is arranged on a frame, so that each lifting unit of the lifting mechanism is aligned with a material frame, i.e., a workstation, in the drying area. The lifting unit in this application is prior art and is not described in detail in this application.

[0030] To summarize, through the above system setting, within the preset stop movement time T1 of the first working stage in an odd number, the picking unit is controlled to grab the material in the first material station area and detach from the station; the picking unit is controlled to place the material that has been grabbed in the second material station area on the station, and then the conveying unit is driven to move to the next station again during the first working stage, so that part of the material detaches from the station to utilize the space in the drying area of ​​the tunnel furnace to realize baking in the second working stage. Therefore, the length of the tunnel furnace can be greatly shortened, the space utilization rate can be improved and the energy consumption can be reduced, so as to solve the problem of the furnace body being too long when the number of stations is large.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0032] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A dynamic time-varying drying system for a tunnel furnace, characterized in that: include: A feeding area, a drying area, a discharging area, a conveying unit and a picking unit. The conveying unit is arranged throughout the feeding area, the drying area and the discharging area. A plurality of workstations are arranged on the conveying unit. The workstations are used to place the materials fed from the feeding area. The conveying unit is used to sequentially convey the materials on the workstations in the feeding area to the drying area and the discharging area. The dynamic time-varying drying system also has a first working stage and a second working stage, the first working stage and the second working stage are arranged in a staggered replacement manner, the first working stage is to control the conveying unit to drive the station to move to the next station and then stop moving for a preset time T1, and then continue to drive the station to move to the next station again; the second working stage is to control the conveying unit to drive the station to stop moving for a preset time T2, and the preset time T2 is greater than the preset time T1; Among them, within the preset time T1 of the first working stage of an odd number, the picking unit is controlled to grab the material in the first material workstation area and detach from the workstation; the picking unit is controlled to place the material grabbed in the second material workstation area on the workstation; the first material workstation area includes a number of the workstations in the drying area located at odd-numbered positions, the second material workstation area includes a number of the workstations in the drying area located at even-numbered positions, and the conveying unit has a zero workstation between the feeding area and the drying area.

2. The dynamic time-varying drying system of the tunnel furnace according to claim 1, characterized in that: The dynamic time-varying drying system also includes: when it is within the preset time T1 of the first working stage of an even number, controlling the picking unit to grab the material in the second material workstation area and leave the workstation; controlling the picking unit to place the material grabbed from the first material workstation area on the workstation.

3. The dynamic time-varying drying system of a tunnel furnace according to claim 1 or 2, characterized in that: include: Located in the feeding area, there are at least two workstations between two adjacent workstations where the materials are placed.

4. The dynamic time-varying drying system of the tunnel furnace according to claim 1, characterized in that: It also includes a frame, on which a box is arranged, an inlet and an outlet are formed on opposite sides of the box, the conveying unit is located between the frame and the box, one end of the conveying unit passes through the inlet and is exposed outside the box to form the feeding area, the other end of the conveying unit passes through the outlet and is exposed outside the box to form the discharging area, and the drying area is formed between the inside of the box.

5. The dynamic time-varying drying system of the tunnel furnace according to claim 4, characterized in that: The conveying unit comprises a driving motor, two transmission arms, two chains and a plurality of material frames, the two transmission arms are movably arranged at the opposite ends of the frame body, the two transmission arms can rotate relative to the frame body, transmission wheels are fixed on the opposite sides of each transmission arm, the transmission wheels arranged in opposition between the two transmission arms are meshed and connected through the chains, a plurality of material frames are arranged on the two chains at intervals, a geared wheel is also fixed on one of the transmission arms, the driving motor is fixed on the frame body, and the output shaft of the driving motor is meshed and connected with the geared wheel; Among them, the plurality of material frames and the plurality of workstations are arranged in a one-to-one correspondence.

6. The dynamic time-varying drying system of the tunnel furnace according to claim 5, characterized in that: The picking unit is arranged inside the box body, and the picking unit is provided with a group of claws corresponding to each of the workstations located in the drying area, and each group of claws is used to grab the material frame arranged corresponding to the workstation.

7. The dynamic time-varying drying system of the tunnel furnace according to claim 6, characterized in that: The picking unit further comprises two mechanical arms and two picking racks, the two mechanical arms are fixed inside the box body and respectively fixed on the inner side walls on both sides of the box body, the two picking racks are respectively installed at the lower end of one of the mechanical arms, the lower ends of the two picking racks are both provided with a plurality of horizontal axes arranged in parallel with the transmission arms, the plurality of horizontal axes of the two picking racks are arranged in an interval and staggered manner along the feeding direction of the conveying unit, and a group of the clamping claws are installed at opposite ends of each of the horizontal axes; A first mounting part is slidably mounted on the horizontal axis, and one of the claws in the group is disposed at the lower end of the first mounting part; a second mounting part is slidably mounted on the horizontal axis, and another of the claws in the group is disposed at the lower end of the second mounting part; a first driving component is used to control the first mounting part or the second mounting part to move closer to or farther away from each other; a second driving component is used to control the picking frame to move closer to or farther away from the chain.

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