Tunnel drying oven with PLC control device

Abstract

The utility model relates to the technical field of ovens, and discloses a tunnel oven with a PLC (programmable logic controller) control device, which comprises a frame, a conveyor belt mechanism mounted at the top of the frame and a tunnel oven body, the tunnel oven body covers a conveying area of the conveyor belt mechanism, and composite baffles are mounted outside open structures on two sides of the tunnel oven body in a sliding manner. Lead screw transmission mechanisms are arranged on the two sides of the front end of the tunnel drying oven body and can conduct lifting adjustment on the composite baffle, and a bidirectional transmission mechanism is installed at the top of the tunnel drying oven body. Through the arrangement of the bidirectional transmission mechanism, the two lead screw transmission mechanisms and the PLC control device automatic lifting device, after the bidirectional transmission mechanism is combined with the two composite baffles for shielding the spaces on the two sides of the tunnel drying oven body for use subsequently, the bidirectional transmission mechanism is driven by the two lead screw transmission mechanisms; and the two composite baffles are synchronously lifted and adjusted by the two lead screw transmission mechanisms in a linear lifting manner.

Description

Technical Field

[0001] This utility model relates to the field of oven technology, specifically a tunnel oven with a PLC control device. Background Technology

[0002] The tunnel drying oven is a type of drying oven that uses a long chamber for hot air circulation and far-infrared drying. It is primarily designed for high-volume, high-efficiency drying needs. The structure mainly consists of two parts: a conveyor system and the drying oven. The drying oven features multi-segment independent PID temperature control, ensuring uniform temperature within the oven. The conveyor speed is variable frequency-controlled, allowing for flexible adjustment and stable operation, making it suitable for batch processing of products.

[0003] Currently, the feeding and discharging open structures on both sides of the tunnel drying oven are fixed baffle structures. Therefore, the distance between them and the conveyor system is fixed, making it difficult to adapt to the drying needs of products of different heights, which greatly limits their practicality. Utility Model Content

[0004] This invention provides a tunnel oven with a PLC control device, which solves the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a tunnel oven with a PLC control device, including a frame, a conveyor belt mechanism installed on the top of the frame, and a tunnel oven body. The tunnel oven body covers the conveying area of ​​the conveyor belt mechanism. Composite baffles are slidably installed on both open structures on both sides of the tunnel oven body. Screw drive mechanisms are provided on both sides of the front end of the tunnel oven body, and the screw drive mechanisms can adjust the composite baffles by raising and lowering.

[0006] The top of the tunnel oven body is equipped with a bidirectional transmission mechanism, and the two output ends of the bidirectional transmission structure are respectively connected to two lead screw transmission mechanisms. The inside of the frame is equipped with a PLC control device, and the PLC control device is electrically connected to a temperature sensor installed inside the tunnel oven body through wires.

[0007] Preferably, the bidirectional transmission mechanism includes a dual-axis motor, with transmission shafts drivingly connected to the output ends on both sides of the dual-axis motor. A bevel gear box is drivingly connected to the end of the transmission shaft away from the dual-axis motor. A first gear and a second gear are provided at the bottom of the bevel gear box. The first gear and the second gear mesh and drive each other, and the middle part of the first gear is drivingly connected to the output end of the bevel gear box.

[0008] Both of the aforementioned lead screw drive mechanisms include a lead screw, the bottom end of which is fitted with a first bearing seat mounted on the surface of the tunnel oven body via a bearing, and the middle part of the second gear is connected to the top end of the lead screw for transmission.

[0009] The lead screw is connected to a nut, and an inverted L-shaped linkage plate is installed between the nut and the top of the composite baffle. Under the meshing transmission of the lead screw and the nut, the inverted L-shaped linkage plate can move synchronously up and down with the composite baffle driven by the nut.

[0010] Preferably, an auxiliary support is installed on the top of the tunnel oven body, and the middle and both sides of the auxiliary support are fixedly installed to the housing surface of the dual-axis motor and the housing surface of the two bevel gearboxes, respectively.

[0011] The middle part of the drive shaft is fitted with a second bearing seat installed on the top of the tunnel oven body via a bearing assembly. There are clearance gaps between the first gear and the top of the tunnel oven body, and between the second gear and the inverted L-shaped linkage plate.

[0012] Preferably, an iron baffle is fixed to the surface of the nut, and a vertical electromagnet capable of magnetically connecting to the surface of the iron baffle is installed on the front end surface of the tunnel oven body. The vertical electromagnet is arranged parallel to the lead screw.

[0013] Preferably, both composite baffles include a first baffle, a second baffle, and a pin. The bottom of the first baffle is provided with a relief groove, and the top of the second baffle is hinged to the relief groove via the pin. Both ends of the pin are provided with external threads, and both ends of the pin are threaded with limit nuts. The two limit nuts can limit and lock the first baffle and the second baffle under the engagement support of the pin.

[0014] Preferably, the width of the first baffle is greater than the width of the second baffle, and the front and rear ends of the first baffle are both engaged with guide rails installed on the corresponding sides of the tunnel oven body.

[0015] Preferably, the PLC control device is electrically connected to the dual-axis motor and the vertical electromagnet via wires, and the housing of the PLC control device is fixedly connected to the inner wall of the frame.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model, through the setting of a bidirectional transmission mechanism, two lead screw transmission mechanisms and a PLC control device for automated lifting, is subsequently used in combination with two composite baffles that block the space on both sides of the tunnel oven body. The bidirectional transmission mechanism drives the two lead screw transmission mechanisms to synchronously lift and adjust the two composite baffles in a linear lifting manner, thereby meeting different usage requirements.

[0018] 2. Both composite baffles in this utility model are adjustable composite structures. During subsequent use, for the maximum clearance requirement, the second baffle inside the composite baffle can be vertically combined with the first baffle under the locking adjustment of the pin and two limit nuts, thereby meeting special processing requirements and optimizing the overall use effect of the device. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a formal schematic diagram of the structure of this utility model;

[0021] Figure 3 This is a right-side view of the structure of this utility model;

[0022] Figure 4 The structure of this utility model Figure 1 Enlarged diagram of point A in the middle.

[0023] In the diagram: 1. Frame; 2. Conveyor belt mechanism; 3. Tunnel oven body; 4. Composite baffle; 41. First baffle; 42. Second baffle; 43. Pin; 44. Limit nut; 5. Dual-shaft motor; 6. Drive shaft; 7. Bevel gearbox; 8. First gear; 9. Second gear; 10. Auxiliary support; 11. Screw drive mechanism; 111. Screw; 112. Nut; 113. Inverted L-shaped linkage plate; 114. Iron baffle; 12. Vertical electromagnet; 13. PLC control device. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-4 A tunnel oven with a PLC control device includes a frame 1, a conveyor belt mechanism 2 installed on the top of the frame 1, and a tunnel oven body 3. The tunnel oven body 3 covers the conveying area of ​​the conveyor belt mechanism 2. Composite baffles 4 are slidably installed on both sides of the open structure of the tunnel oven body 3. Screw drive mechanisms 11 are provided on both sides of the front end of the tunnel oven body 3. The screw drive mechanisms 11 can adjust the composite baffles 4 by raising and lowering.

[0026] The top of the tunnel oven body 3 is equipped with a bidirectional transmission mechanism, and the two output ends of the bidirectional transmission structure are respectively connected to the two lead screw transmission mechanisms 11.

[0027] The bidirectional transmission mechanism includes a dual-axis motor 5, with transmission shafts 6 connected to the output ends on both sides of the dual-axis motor 5. A bevel gear box 7 is connected to the end of the transmission shaft 6 away from the dual-axis motor 5. A first gear 8 and a second gear 9 are provided at the bottom of the bevel gear box 7. The first gear 8 and the second gear 9 mesh and transmit power, and the middle part of the first gear 8 is connected to the output end of the bevel gear box 7.

[0028] Both lead screw transmission mechanisms 11 include lead screws 111. The bottom end of the lead screw 111 is fitted with a first bearing seat mounted on the surface of the tunnel oven body 3 via a bearing sleeve. The middle part of the second gear 9 is connected to the top end of the lead screw 111. A nut 112 is meshed with the surface of the lead screw 111. An inverted L-shaped linkage plate 113 is installed between the nut 112 and the top of the composite baffle 4. Under the meshing transmission of the lead screw 111 and the nut 112, the inverted L-shaped linkage plate 113 can move synchronously up and down with the composite baffle 4 driven by the nut 112.

[0029] An auxiliary support 10 is installed on the top of the tunnel oven body 3. The middle and both sides of the auxiliary support 10 are fixedly installed to the housing surface of the dual-axis motor 5 and the housing surface of the two bevel gear boxes 7, respectively, to ensure the stability of the dual-axis motor 5 and the bevel gear box 7 during use.

[0030] The middle part of the drive shaft 6 is fitted with a second bearing seat installed on the top of the tunnel oven body 3 via a bearing set. There are clearance gaps between the first gear 8 and the top of the tunnel oven body 3, and between the second gear 9 and the inverted L-shaped linkage plate 113, to avoid structural interference.

[0031] The internal housing of the frame 1 contains a PLC control device 13. The PLC control device 13 is electrically connected to a temperature sensor installed inside the tunnel oven body 3 via wires. The PLC control device 13 is also electrically connected to the dual-axis motor 5 and the vertical electromagnet 12 via wires. The housing of the PLC control device 13 is fixedly connected to the inner wall of the frame 1.

[0032] When it is necessary to adjust the inlet and outlet space of the tunnel oven body 3 during use, the dual-axis motor 5 can be started by the PLC control device 13. The two output ends inside the dual-axis motor 5 will transmit power to the two bevel gear boxes 7 through their respective corresponding transmission shafts 6. Subsequently, the output ends of the two bevel gear boxes 7 will respectively mesh with the first gear 8 to transmit power to their respective corresponding second gears 9, thereby causing the two second gears 9 to drive the lead screws 111 inside the two lead screw transmission mechanisms 11 to rotate synchronously.

[0033] After rotation, the two lead screws 111 will respectively engage the transmission nuts 112, which in turn will cause the two nuts 112 to drive their respective composite baffles 4 to automatically rise and fall linearly through their respective inverted L-shaped linkage plates 113, thereby automatically adjusting the entry and exit space of the tunnel oven body 3.

[0034] Please see Figure 1 An iron baffle 114 is fixed to the surface of the nut 112. A vertical electromagnet 12 capable of magnetically connecting to the surface of the iron baffle 114 is installed on the front surface of the tunnel oven body 3. The vertical electromagnet 12 is arranged parallel to the lead screw 111.

[0035] In use, to ensure the stability of the two composite baffles 4 after lifting and adjusting, two vertical electromagnets 12 are used in conjunction with the magnetic attraction adjustment of two iron baffles 114 to magnetically limit the movement of the two nuts 112 respectively. Specifically, when the nuts 112 need to be lifted and moved, the vertical electromagnets 12 are turned off. After the nuts 112 are in the appropriate lifting and lowering position, the vertical electromagnets 12 are turned on. The vertical electromagnets 12 use the magnetic attraction of the iron baffles 114 to limit and protect the corresponding nuts 112.

[0036] Please see Figure 1 , Figure 3 Both composite baffles 4 include a first baffle 41, a second baffle 42, and a pin 43. The bottom of the first baffle 41 is provided with a clearance groove, and the top of the second baffle 42 is hinged to the clearance groove through the pin 43. Both ends of the pin 43 are provided with external threads, and both ends of the pin 43 are threadedly connected to limit nuts 44. The two limit nuts 44 can limit and lock the first baffle 41 and the second baffle 42 under the engagement support of the pin 43. The width of the first baffle 41 is greater than the width of the second baffle 42, and the front and rear ends of the first baffle 41 are both snapped onto the guide rails on the corresponding sides of the tunnel oven body 3.

[0037] When in use, considering the maximum clearance requirement, the two composite baffles 4 can be adjusted accordingly, as follows:

[0038] Tighten the limiting nuts 44 on both ends of the inner pin 43 of one composite baffle 4, so that the two limiting nuts 44 are temporarily moved away from the first baffle 41 under the support of the pin 43. This restores the degree of freedom of the second baffle 42 to rotate relative to the first baffle 41. Then rotate the second baffle 42 to a maximum rotation angle of 90 degrees, that is, the second baffle 42 is perpendicular to the first baffle 41. After completion, reset and tighten the two limiting nuts 44, and then re-lock the adjusted first baffle 41 and second baffle 42. The remaining composite baffle 4 is adjusted in the same way.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tunnel oven with a PLC control device, comprising a frame (1), a conveyor belt mechanism (2) mounted on top of the frame (1), and a tunnel oven body (3), wherein the tunnel oven body (3) covers the conveying area of ​​the conveyor belt mechanism (2), characterized in that: Composite baffles (4) are slidably installed on both sides of the open structure of the tunnel oven body (3), and screw drive mechanisms (11) are provided on both sides of the front end of the tunnel oven body (3), and the screw drive mechanisms (11) can adjust the composite baffles (4) by raising and lowering. The top of the tunnel oven body (3) is equipped with a bidirectional transmission mechanism, and the two output ends of the bidirectional transmission structure are respectively connected to two lead screw transmission mechanisms (11). The frame (1) is equipped with a PLC control device (13), and the PLC control device (13) is electrically connected to a temperature sensor installed inside the tunnel oven body (3) via wires.

2. A tunnel oven with a PLC control device according to claim 1, characterized in that: The bidirectional transmission mechanism includes a dual-axis motor (5), and the output ends of both sides of the dual-axis motor (5) are connected to a transmission shaft (6). The end of the transmission shaft (6) away from the dual-axis motor (5) is connected to a bevel gear box (7). The bottom of the bevel gear box (7) is provided with a first gear (8) and a second gear (9). The first gear (8) and the second gear (9) mesh and transmit power, and the middle part of the first gear (8) is connected to the output end of the bevel gear box (7). Both of the aforementioned lead screw drive mechanisms (11) include a lead screw (111), the bottom end of the lead screw (111) is fitted with a first bearing seat mounted on the surface of the tunnel oven body (3) via a bearing, and the middle part of the second gear (9) is connected to the top end of the lead screw (111) for transmission. The surface of the lead screw (111) is meshed with a nut (112), and an inverted L-shaped linkage plate (113) is installed between the nut (112) and the top of the composite baffle (4). Under the meshing transmission of the lead screw (111) and the nut (112), the inverted L-shaped linkage plate (113) can move synchronously up and down with the composite baffle (4) driven by the nut (112).

3. A tunnel drying oven with a PLC control device according to claim 2, characterized in that: An auxiliary bracket (10) is installed on the top of the tunnel oven body (3). The middle and both sides of the auxiliary bracket (10) are fixedly installed on the housing surface of the dual-axis motor (5) and the housing surface of the two bevel gearboxes (7), respectively. The middle part of the drive shaft (6) is fitted with a second bearing seat installed on the top of the tunnel oven body (3) via a bearing set. There are clearance gaps between the first gear (8) and the top of the tunnel oven body (3) and between the second gear (9) and the inverted L-shaped linkage plate (113).

4. A tunnel oven with a PLC control device according to claim 2, characterized in that: The surface of the nut (112) is fixed with an iron baffle (114), and the front end surface of the tunnel oven body (3) is equipped with a vertical electromagnet (12) that can magnetically connect to the surface of the iron baffle (114). The vertical electromagnet (12) is arranged parallel to the lead screw (111).

5. A tunnel oven with a PLC control device according to claim 1, characterized in that: Both of the composite baffles (4) include a first baffle (41), a second baffle (42), and a pin (43). The bottom of the first baffle (41) is provided with a relief groove, and the top of the second baffle (42) is hinged in the relief groove through the pin (43). The surfaces of both ends of the pin (43) are provided with external threads, and the surfaces of both ends of the pin (43) are threaded with limit nuts (44). The two limit nuts (44) can limit and lock the first baffle (41) and the second baffle (42) under the meshing support of the pin (43).

6. A tunnel oven with a PLC control device according to claim 5, characterized in that: The width of the first baffle (41) is greater than the width of the second baffle (42), and the front and rear ends of the first baffle (41) are both snapped into guide rails installed on the corresponding sides of the tunnel oven body (3).

7. A tunnel oven with a PLC control device according to claim 1, characterized in that: The PLC control device (13) is electrically connected to the dual-axis motor (5) and the vertical electromagnet (12) via wires, and the housing of the PLC control device (13) is fixedly connected to the inner wall of the frame (1).

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