A conveying chain adjusting system for a drying line and a drying apparatus

Abstract

The present application relates to drying equipment technical field, particularly to a kind of drying line with conveying chain adjusting system and drying equipment, drying line with conveying chain adjusting system, including frame body, tray, detection mechanism and control system, first conveying chain is equipped on frame body, second conveying chain is arranged in parallel with first conveying chain with interval, first tensioning mechanism for adjusting the tension degree of first conveying chain and second tensioning mechanism for adjusting the tension degree of second conveying chain;Tray is arranged on the mounting surface formed by first conveying chain and second conveying chain;When the first end of tray is detected to be inclined forward by detection mechanism, control system controls second tensioning mechanism to tension second conveying chain at this time;When the first end of tray is detected to be inclined backward by detection mechanism, control system controls first tensioning mechanism to tension first conveying chain, so that the first end of tray and the second end of tray can be moved synchronously and smoothly at this time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drying equipment, in particular to a conveying chain adjusting system for a drying line and a drying equipment. BACKGROUND

[0002] Paper pulp molded products are a kind of pollution-free scientific and technological green environmental protection products made of plant fibers or waste paper products as basic materials, which can be completely recycled and used, so paper pulp molded products have been widely used. The drying line is a key production equipment for paper pulp molded products.

[0003] The existing drying line for producing paper pulp molded products includes a frame, a first conveying chain and a second conveying chain arranged in parallel and at intervals on the frame, and a driving wheel set for driving the first conveying chain and the second conveying chain to rotate synchronously, a tray is arranged between the first conveying chain and the second conveying chain, the first end of the tray is connected with the first conveying chain, and the second end of the tray is connected with the second conveying chain, in order to ensure the stable operation of the tray, the first end of the tray and the second end of the tray need to be moved synchronously. In the product drying process, the first conveying chain and the second conveying chain need to pass through the high-temperature zone and the low-temperature zone repeatedly, and the length of the first conveying chain and the second conveying chain will change due to thermal expansion and cold contraction, which causes the first end of the tray connected to the first conveying chain and the second end of the tray connected to the second conveying chain to be staggered in front and back, and cannot be moved synchronously and stably, which has an adverse effect on the quality of the paper pulp molded formed in the tray. SUMMARY

[0004] The technical problem to be solved by the present application is that the first end of the tray connected to the first conveying chain and the second end of the tray connected to the second conveying chain will be staggered in front and back due to thermal expansion and cold contraction, and cannot be moved synchronously and stably.

[0005] In order to solve the above technical problems, the purpose of the present application is to provide a conveying chain adjusting system for a drying line, which comprises:

[0006] a frame, the frame is provided with a first conveying chain, a second conveying chain arranged in parallel and at intervals with the first conveying chain, a first tensioning mechanism for adjusting the tensioning degree of the first conveying chain, and a second tensioning mechanism for adjusting the tensioning degree of the second conveying chain;

[0007] a tray, the tray is arranged on the mounting surface formed by the first conveying chain and the second conveying chain;

[0008] a detection mechanism, the detection mechanism is arranged on the frame, the moving direction of the first conveying chain is forward, and the detection mechanism is used for detecting the front and back inclination direction of the tray;

[0009] A control system, the first tensioning mechanism, the second tensioning mechanism and the detection mechanism are electrically connected with the control system; when the detection mechanism detects that the first end of the tray is located in front of the second end of the tray, the control system controls the second tensioning mechanism to tension the second conveying chain; when the detection mechanism detects that the first end of the tray is located behind the second end of the tray, the control system controls the first tensioning mechanism to tension the first conveying chain.

[0010] As a preferred solution, the first tensioning mechanism comprises a first tensioning wheel and a first tensioning cylinder for driving the first tensioning wheel to move, the first tensioning cylinder is connected to the frame body, and the first tensioning wheel is engaged on the inner side of the first conveying chain.

[0011] The second tensioning mechanism comprises a second tensioning wheel and a second tensioning cylinder for driving the second tensioning wheel to move, the second tensioning cylinder is connected to the frame body, and the second tensioning wheel is engaged on the inner side of the second conveying chain.

[0012] The first tensioning cylinder and the second tensioning cylinder are electrically connected with the control system.

[0013] As a preferred solution, the first tensioning cylinder comprises a first cylinder body, a first piston plate is arranged in the inner cavity of the first cylinder body, the first piston plate divides the inner cavity of the first cylinder body into a first cavity and a second cavity, and inflation of the first cavity can drive the first piston plate to move the first tensioning wheel to tension the first conveying chain; the first cylinder body is connected with a first pressure reducing valve in communication with the first cavity.

[0014] The second tensioning cylinder comprises a second cylinder body, a second piston plate is arranged in the inner cavity of the second cylinder body, the second piston plate divides the inner cavity of the second cylinder body into a third cavity and a fourth cavity, and inflation of the third cavity can drive the second piston plate to move the second tensioning wheel to tension the second conveying chain; the second cylinder body is connected with a second pressure reducing valve in communication with the third cavity.

[0015] The first pressure reducing valve and the second pressure reducing valve are electrically connected with the control system.

[0016] As a preferred solution, a first air pressure regulating valve is arranged between the first cavity gas inlet end and a high-pressure gas source, a second air pressure regulating valve is arranged between the third cavity gas inlet end and the high-pressure gas source, and the first air pressure regulating valve and the second air pressure regulating valve are electrically connected with the control system.

[0017] As a preferred solution, the drying line conveying chain adjusting system comprises a first adjusting block movably connected to the frame body and a third tensioning wheel rotatably connected to the first adjusting block, the third tensioning wheel being engaged with the inner side of the first conveying chain.

[0018] As a preferred solution, the first adjusting block is connected with a first screw rod, the frame body is provided with a first fixed plate, one end of the first screw rod away from the first adjusting block is arranged in the first fixed plate, the outer side of the first screw rod is screwed with a first nut and a second nut, the first nut and the second nut are respectively located on the two sides of the first fixed plate.

[0019] As a preferred solution, the outer side of the first screw rod is sleeved with a first compression spring, one end of the first compression spring is abutted against the first fixed plate, the other end of the first compression spring is abutted against the first nut.

[0020] As a preferred solution, the drying line conveying chain adjusting system comprises a second adjusting block movably connected to the frame body and a fourth tensioning wheel rotatably connected to the second adjusting block, the fourth tensioning wheel being engaged with the inner side of the second conveying chain, and the fourth tensioning wheel and the third tensioning wheel are oppositely arranged along a direction perpendicular to the first conveying chain.

[0021] As a preferred solution, the detection mechanism comprises a first diffuse reflection sensor and a second diffuse reflection sensor, the first diffuse reflection sensor is fixed on the side of the frame body close to the first conveying chain, the test end of the first diffuse reflection sensor is arranged towards the first end of the tray to detect the position of the first end of the tray, the second diffuse reflection sensor is fixed on the side of the frame body close to the second conveying chain, the second diffuse reflection sensor is arranged towards the second end of the tray to detect the position of the second end of the tray, and the first diffuse reflection sensor and the second diffuse reflection sensor are electrically connected to the control system.

[0022] A drying device comprising the above drying line conveying chain adjusting system.

[0023] Compared with the prior art, the drying line conveying chain adjusting system has the following beneficial effects:

[0024] The drying line conveying chain adjusting system of the present application comprises a frame, a tray, a detection mechanism and a control system, the frame is provided with a first conveying chain, a second conveying chain arranged in parallel with the first conveying chain at intervals, a first tensioning mechanism for adjusting the tensioning degree of the first conveying chain and a second tensioning mechanism for adjusting the tensioning degree of the second conveying chain; the tray is arranged on the mounting surface formed by the first conveying chain and the second conveying chain; the detection mechanism is arranged on the frame and is used for detecting the tilting direction of the tray; when the detection mechanism detects that the first end of the tray tilts forward, it indicates that the horizontal forward pulling force exerted on the first end of the tray by the first conveying chain is greater than the horizontal forward pulling force exerted on the second end of the tray by the second conveying chain, which indicates that the second conveying chain is looser, at this time the control system controls the second tensioning mechanism to tension the second conveying chain, thereby increasing the horizontal forward pulling force exerted on the tray by the second conveying chain and reducing the front-back displacement of the two ends of the tray, so that the first end of the tray and the second end of the tray can move synchronously and stably; similarly, when the detection mechanism detects that the first end of the tray tilts backward, it indicates that the first conveying chain is looser, at this time the control system controls the first tensioning mechanism to tension the first conveying chain, so that the first end of the tray and the second end of the tray can move synchronously and stably. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a top view of the drying equipment provided with the drying line conveying chain adjusting system of the present application;

[0026] Figure 2 It is Figure 1 A-A sectional view in the middle;

[0027] Figure 3 It is Figure 2 A local enlarged view at C in the middle;

[0028] In the figure, 1 is a frame, 21 is a first conveying chain, 22 is a second conveying chain, 31 is a first tensioning mechanism, 311 is a first tensioning wheel, 312 is a first tensioning cylinder, 32 is a second tensioning mechanism, 4 is a tray, 51 is a first air pressure adjusting valve, 52 is a second air pressure adjusting valve, 61 is a first adjusting block, 62 is a third tensioning wheel, 63 is a first screw rod, 64 is a first fixed plate, 65 is a first nut, 66 is a second nut, 67 is a first compression spring, 71 is a first diffuse reflection sensor, 72 is a second diffuse reflection sensor, 81 is a fixed wheel seat, 82 is a steering wheel, 83 is a first drive wheel, 84 is a second drive wheel, and 85 is a drive shaft. DETAILED DESCRIPTION

[0029] The specific embodiments of the present application will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the present application but are not used to limit the scope of the present application.

[0030] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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 the invention. It should be understood that the terms "first," "second," etc., are used in this invention to describe various information, but this information should not be limited to these terms; these terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this invention, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0031] like Figures 1 to 3 As shown, a preferred embodiment of the conveyor chain adjustment system for a drying line according to the present invention includes:

[0032] The frame 1 is provided with a first conveyor chain 21, a second conveyor chain 22 arranged parallel to and spaced apart from the first conveyor chain 21, a first tensioning mechanism 31 for adjusting the tension of the first conveyor chain 21, and a second tensioning mechanism 32 for adjusting the tension of the second conveyor chain 22.

[0033] The pallet 4 is set on the mounting surface formed by the first conveyor chain 21 and the second conveyor chain 22, that is, the first end of the pallet 4 is connected to the first conveyor chain 21 and the second end of the pallet 4 is connected to the second conveyor chain 22.

[0034] The testing mechanism is set on the frame 1 and is used to detect the tilt direction of the tray 4;

[0035] The control system, the first tensioning mechanism 31, the second tensioning mechanism 32 and the detection mechanism are electrically connected with the control system; the moving direction of the first conveying chain 21 is the front direction; when the detection mechanism detects that the first end of the tray 4 is located in front of the tray 4 and the first end of the tray 4 is inclined forward, the control system controls the second tensioning mechanism 32 to tension the second conveying chain 22; when the detection mechanism detects that the first end of the tray 4 is located behind the second end of the tray 4, that is, the first end of the tray 4 is inclined backward, the control system controls the first tensioning mechanism 31 to tension the first conveying chain 21. Specifically, when the detection mechanism detects that the first end of the tray 4 is inclined forward, it indicates that the horizontal forward pulling force exerted by the first conveying chain 21 on the first end of the tray 4 is greater than the horizontal forward pulling force exerted by the second conveying chain 22 on the second end of the tray 4, which indicates that the second conveying chain 22 is loose, and at this time the control system controls the second tensioning mechanism 32 to tension the second conveying chain 22, thereby increasing the horizontal forward pulling force exerted by the second conveying chain 22 on the tray 4, and further enabling the first end of the tray 4 and the second end of the tray 4 to move synchronously and stably; similarly, when the detection mechanism detects that the first end of the tray 4 is inclined backward, it indicates that the first conveying chain 21 is loose, and at this time the control system controls the first tensioning mechanism 31 to tension the first conveying chain 21, thereby enabling the first end of the tray 4 and the second end of the tray 4 to move synchronously and stably.

[0036] The first tensioning mechanism 31 includes a first tensioning wheel 311 and a first tensioning cylinder 312 for driving the first tensioning wheel 311 to move, the first tensioning cylinder 312 is connected to the frame body 1, and the first tensioning wheel 311 is engaged on the inner side of the first conveying chain 21; the second tensioning mechanism 32 includes a second tensioning wheel and a second tensioning cylinder for driving the second tensioning wheel to move, the second tensioning cylinder is connected to the frame body 1, and the second tensioning wheel is engaged on the inner side of the second conveying chain 22; the first tensioning cylinder 312 and the second tensioning cylinder are electrically connected with the control system. When it is necessary to increase the tensioning degree of the first conveying chain 21, the first tensioning cylinder 312 drives the first tensioning wheel 311 to move towards the outer side of the first conveying chain 21, and when it is necessary to increase the tensioning degree of the second conveying chain 22, the second tensioning cylinder drives the second tensioning wheel to move towards the outer side of the second conveying chain 22. Specifically, as shown in Figure 2 The first tensioning wheel 311 is rotatably connected to the bearing seat through a bearing, the bearing seat is slidingly and guidingly connected to the frame body 1, and the first tensioning cylinder 312 is connected with a connecting rod, one end of the connecting rod away from the first tensioning cylinder 312 being connected to the bearing seat.

[0037] In this embodiment, the first tensioning cylinder 312 includes a first cylinder body, a first piston plate is arranged in the inner cavity of the first cylinder body, the first piston plate divides the inner cavity of the first cylinder body into a first cavity and a second cavity, and inflation of the first cavity can drive the first piston plate to move the first tensioning wheel to tension the first conveying chain. The cylinder body is connected with a first pressure reducing valve in communication with the first cavity. The second tensioning cylinder includes a second cylinder body, a second piston plate is arranged in the inner cavity of the second cylinder body, the second piston plate divides the inner cavity of the second cylinder body into a third cavity and a fourth cavity, and inflation of the third cavity can drive the second piston plate to move the second tensioning wheel to tension the second conveying chain. The second cylinder body is connected with a second pressure reducing valve in communication with the third cavity. The first pressure reducing valve and the second pressure reducing valve are electrically connected with the control system. Specifically, the opening degree of the first pressure reducing valve is controlled by the control system to adjust the air pressure in the inner cavity of the first cylinder body, so that the force applied by the first tensioning cylinder 312 to the first tensioning wheel 311 remains constant. When the first conveying chain 21 is heated and expanded, the telescopic end of the first tensioning cylinder 312 automatically tensions the first conveying chain 21. When the first conveying chain 21 is cooled and contracted, the telescopic end of the first tensioning cylinder 312 automatically relaxes the first conveying chain 21. The opening degree of the second pressure reducing valve is controlled by the control system to adjust the air pressure in the inner cavity of the second cylinder body, so that the force applied by the second tensioning cylinder to the second tensioning wheel remains constant. When the second conveying chain 22 is heated and expanded, the telescopic end of the second tensioning cylinder automatically tensions the second conveying chain 22. When the second conveying chain 22 is cooled and contracted, the telescopic end of the second tensioning cylinder automatically relaxes the second conveying chain 22.

[0038] Further, to facilitate control of the tensioning force of the first tensioning cylinder 312 on the first conveying chain 21, a first air pressure regulating valve 51 is arranged between the air inlet end of the first air cavity and the high-pressure gas source. To facilitate control of the tensioning force of the second tensioning cylinder on the second conveying chain 22, a second air pressure regulating valve 52 is arranged between the air inlet end of the third air cavity and the high-pressure gas source. The first air pressure regulating valve 51 and the second air pressure regulating valve 52 are electrically connected with the control system. Specifically, increasing the pressure of the first air pressure regulating valve 51 while reducing the opening degree of the first pressure reducing valve can increase the tensioning force of the first tensioning cylinder 312 on the first conveying chain 21. Reducing the pressure of the first air pressure regulating valve 51 while increasing the opening degree of the first pressure reducing valve can reduce the tensioning force of the first tensioning cylinder 312 on the first conveying chain 21. The arrangement of the first air pressure regulating valve 51 further improves the adjustable range of the force applied by the first tensioning cylinder 312 to the first conveying chain 21.

[0039] In the embodiment, the conveying chain adjusting system for the drying line comprises a first adjusting block 61 movably connected to the frame body 1 and a third tensioning wheel 62 rotatably connected to the first adjusting block 61, and the third tensioning wheel 62 is engaged with the inner side of the first conveying chain 21. When the stroke of the extension end of the first tensioning cylinder 312 cannot meet the requirements, the position of the first adjusting block 61 is moved to adjust the position of the third tensioning wheel 62, so as to change the preliminary adjustment of the tensioning degree of the first conveying chain 21, and then the first tensioning cylinder 312 is used to drive the first tensioning wheel 311 to accurately adjust the tensioning degree of the first conveying chain 21, so as to ensure that the adjustment range of the tensioning degree of the first conveying chain 21 is large and the adjustment accuracy is high.

[0040] Specifically, the first adjusting block 61 is connected with a first screw rod 63, the frame body 1 is provided with a first fixed plate 64, one end of the first screw rod 63 away from the first adjusting block 61 is arranged in the first fixed plate 64, the outer side of the first screw rod 63 is screwed with a first nut 65 and a second nut 66, and the first nut 65 and the second nut 66 are respectively located on the two sides of the first fixed plate 64. By screwing the first nut 65 and the second nut 66, the position of the first screw rod 63 on the first fixed plate 64 can be adjusted, so as to adjust the position of the first adjusting block 61.

[0041] Further, the outer side of the first screw rod 63 is sleeved with a first compression spring 67, one end of the first compression spring 67 abuts against the first fixed plate 64, and the other end of the first compression spring 67 abuts against the first nut 65. The first compression spring 67 can be deformed under pressure or tension, further improving the tensioning degree adjustment range of the first conveying chain 21.

[0042] In order to facilitate the adjustment of the second conveying chain 22, in the embodiment, the conveying chain adjusting system for the drying line comprises a second adjusting block movably connected to the frame body 1 and a fourth tensioning wheel rotatably connected to the second adjusting block, the fourth tensioning wheel is engaged with the inner side of the second conveying chain 22, and the fourth tensioning wheel and the third tensioning wheel 62 are arranged in opposite directions perpendicular to the first conveying chain 21.

[0043] The implementation mode of the detection mechanism is various, such as adopting a camera to take a photo of the tray 4, and deriving the inclination direction of the tray 4 according to the perpendicularity between the side of the tray 4 and the first conveying chain 21 and the second conveying chain 22; in the embodiment, in order to reduce the cost, the detection mechanism comprises a first diffuse reflection sensor 71 and a second diffuse reflection sensor 72, the first diffuse reflection sensor 71 is fixed on the frame body 1 near the side of the first conveying chain 21, and the test end of the first diffuse reflection sensor 71 is arranged towards the first end of the tray 4, so as to detect the position of the first end of the tray 4; the second diffuse reflection sensor 72 is fixed on the frame body 1 near the side of the second conveying chain 22, and the second diffuse reflection sensor 72 is arranged towards the second end of the tray 4, so as to detect the position of the second end of the tray 4; the first diffuse reflection sensor 71 and the second diffuse reflection sensor 72 are electrically connected with the control system. Specifically, the first conveying chain 21 and the second conveying chain 22 are provided with a plurality of trays 4, and each tray 4 is arranged in the length direction of the first conveying chain 21 and the second conveying chain 22; in the operation process of the drying line, each tray 4 passes through the position of the first diffuse reflection sensor 71 and the position of the second diffuse reflection sensor 72, respectively; if the two ends of the first tray 4 do not exist dislocation, the time when the first end of the tray 4 is detected by the first diffuse reflection sensor 71 is the same as the time when the second end of the tray 4 is detected by the second diffuse reflection sensor 72; if the two ends of the first tray 4 exist dislocation, the inclination direction of the tray 4 can be judged according to the order of the signals detected by the first diffuse reflection sensor 71 and the second diffuse reflection sensor 72. In the embodiment, the connecting line between the measurement center point of the first diffuse reflection sensor 71 and the measurement center point of the second diffuse reflection sensor 72 is arranged perpendicular to the front-rear direction.

[0044] A drying device comprises the conveying chain adjusting system for the drying line described above; specifically, as shown in Figure 1 、 Figure 2 a plurality of steering wheels 82 are arranged on the frame body 1 in an up-down interval, so that the first conveying chain 21 and the second conveying chain 22 are each provided with multiple layers, the first conveying chain 21 and the second conveying chain 22 are arranged in parallel and at intervals, one end of the driving shaft 85 is connected with the first driving wheel 83 for driving the first conveying chain 21 to rotate, and the other end of the driving wheel is connected with the second driving wheel 84 for driving the second conveying chain 22 to rotate.

[0045] In summary, the conveying chain adjusting system for drying line of the present application comprises a frame body 1, a tray 4, a detection mechanism and a control system, the frame body 1 is provided with a first conveying chain 21, a second conveying chain 22 arranged in parallel and spaced apart with the first conveying chain 21, a first tensioning mechanism 31 for adjusting the tension degree of the first conveying chain 21 and a second tensioning mechanism 32 for adjusting the tension degree of the second conveying chain 22; the first end of the tray 4 is connected with the first conveying chain 21, and the second end of the tray 4 is connected with the second conveying chain 22; the detection mechanism is arranged on the frame body 1, and the detection mechanism is used for detecting the inclination direction of the tray 4; when the detection mechanism detects that the first end of the tray 4 inclines forward, it indicates that the horizontal forward pulling force applied to the first end of the tray 4 by the first conveying chain 21 is greater than the horizontal forward pulling force applied to the second end of the tray 4 by the second conveying chain 22, which indicates that the second conveying chain 22 is loose, at this time the control system controls the second tensioning mechanism 32 to tension the second conveying chain 22, so as to increase the horizontal forward pulling force applied to the tray 4 by the second conveying chain 22, and then the first end of the tray 4 and the second end of the tray 4 can move synchronously and stably; similarly, when the detection mechanism detects that the first end of the tray 4 inclines backward, it indicates that the first conveying chain 21 is loose, at this time the control system controls the first tensioning mechanism 31 to tension the first conveying chain 21, so that the first end of the tray 4 and the second end of the tray 4 can move synchronously and stably.

[0046] The above only describes the preferred embodiments of the present application, and it should be noted that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, and these improvements and replacements should be considered as the protection scope of the present application.

Claims

1. A conveyor chain adjustment system for a drying line, characterized in that The utility model relates to a kind of automatic tensioning mechanism of conveying chain, including: Frame body (1), first conveying chain (21) is equipped on the frame body (1), second conveying chain (22) is arranged in parallel with the first conveying chain (21) and is spaced, first tensioning mechanism (31) for adjusting the tension degree of the first conveying chain (21) and second tensioning mechanism (32) for adjusting the tension degree of the second conveying chain (22); Tray (4), the tray (4) is arranged on the mounting surface formed by the first conveying chain (21) and the second conveying chain (22); Detection mechanism, the detection mechanism is arranged on the frame body (1); Control system, the first tensioning mechanism (31), the second tensioning mechanism (32) and the detection mechanism are electrically connected with the control system;With the moving direction of the first conveying chain (21) being front, when the detection mechanism detects that the first end of the tray (4) is located in front of the second end of the tray (4), the control system controls the second tensioning mechanism (32) to tighten the second conveying chain (22);When the detection mechanism detects that the first end of the tray (4) is located in the rear of the second end of the tray (4), the control system controls the first tensioning mechanism (31) to tighten the first conveying chain (21).

2. The conveyor chain adjustment system for a drying line according to claim 1, characterized in that The first tensioning mechanism (31) includes first tensioning wheel (311) and first tensioning cylinder (312) for driving the first tensioning wheel (311) to move, the first tensioning cylinder (312) is connected on the frame body (1), and the first tensioning wheel (311) is engaged in the inner side of the first conveying chain (21); The second tensioning mechanism (32) includes second tensioning wheel and second tensioning cylinder for driving the second tensioning wheel to move, the second tensioning cylinder is connected on the frame body (1), and the second tensioning wheel is engaged in the inner side of the second conveying chain (22); The first tensioning cylinder (312) and the second tensioning cylinder are electrically connected with the control system.

3. The conveyor chain adjustment system for a drying line according to claim 2, characterized in that The first tensioning cylinder (312) includes first cylinder body, first piston plate is arranged in the inner cavity of the first cylinder body, the first piston plate separates the inner cavity of the first cylinder body into first cavity and second cavity, and the first piston plate drives the first tensioning wheel to move to tighten the first conveying chain when the first cavity is inflated, and the first cylinder body is connected with the first pressure reducing valve that communicates with the first cavity; The second tensioning cylinder includes second cylinder body, second piston plate is arranged in the inner cavity of the second cylinder body, the second piston plate separates the inner cavity of the second cylinder body into third cavity and fourth cavity, and the second piston plate drives the second tensioning wheel to move to tighten the second conveying chain when the third cavity is inflated, and the second cylinder body is connected with the second pressure reducing valve that communicates with the third cavity; The first pressure reducing valve and the second pressure reducing valve are electrically connected with the control system.

4. The conveyor chain adjustment system for a drying line according to claim 3, characterized in that A first pressure regulating valve (51) is provided between the air inlet end of the first cavity and the high-pressure air source, and a second pressure regulating valve (52) is provided between the air inlet end of the third cavity and the high-pressure air source. Both the first pressure regulating valve (51) and the second pressure regulating valve (52) are electrically connected to the control system.

5. The conveyor chain adjustment system for a drying line of claim 1, wherein, The conveyor chain adjustment system for the drying line includes a first adjustment block (61) movably connected to the frame (1) and a third tension wheel (62) rotatably connected to the first adjustment block (61), the third tension wheel (62) meshing with the inner side of the first conveyor chain (21).

6. The conveyor chain adjustment system for a drying line according to claim 5, characterized in that The first adjusting block (61) is connected to a first screw (63), and the frame (1) is provided with a first fixing plate (64). The end of the first screw (63) away from the first adjusting block (61) passes through the first fixing plate (64). A first nut (65) and a second nut (66) are screwed to the outside of the first screw (63). The first nut (65) and the second nut (66) are respectively located on both sides of the first fixing plate (64).

7. The conveyor chain adjustment system for a drying line according to claim 6, characterized in that A first compression spring (67) is sleeved on the outside of the first screw (63). One end of the first compression spring (67) abuts against the first fixing plate (64), and the other end of the first compression spring (67) abuts against the first nut (65).

8. The conveyor chain adjustment system for a drying line of claim 5, wherein, The conveyor chain adjustment system for the drying line includes a second adjustment block movably connected to the frame (1) and a fourth tension wheel rotatably connected to the second adjustment block. The fourth tension wheel meshes with the inner side of the second conveyor chain (22), and the fourth tension wheel and the third tension wheel (62) are arranged at intervals relative to each other in a direction perpendicular to the first conveyor chain (21).

9. The conveyor chain adjustment system for a drying line of claim 1, wherein, The detection mechanism includes a first diffuse reflection sensor (71) and a second diffuse reflection sensor (72). The first diffuse reflection sensor (71) is fixed on the side of the frame (1) near the first conveyor chain (21). The test end of the first diffuse reflection sensor (71) is arranged facing the first end of the tray (4) to detect the position of the first end of the tray (4). The second diffuse reflection sensor (72) is fixed on the side of the frame (1) near the second conveyor chain (22), and the second diffuse reflection sensor (72) is arranged toward the second end of the tray (4) to detect the position of the second end of the tray (4); Both the first diffuse reflection sensor (71) and the second diffuse reflection sensor (72) are electrically connected to the control system.

10. A drying apparatus, characterized by, Includes the conveyor chain adjustment system for the drying line as described in any one of claims 1 to 9.

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