A preservative spray device

Abstract

The utility model relates to spray device technical field, and disclose a kind of preservative spray device, including the conveying device for conveying, two groups of spraying units are sequentially equipped in conveying device upper portion according to conveying direction, and overturning unit is equipped between two groups of spraying units;Each group of spraying units includes the spray unit for spraying and the drying unit for drying, and spray unit and drying unit are arranged according to the conveying direction of conveying device;Overturning unit includes the first bearing frame being equipped in conveying device upper portion, and the first bearing frame opposite side is equipped with the first sliding block being penetrated first bearing frame, and the first bearing frame upper portion is equipped with two first driving motors that synchronously drive two first sliding blocks to move up and down.The utility model in the present application, by setting two groups of spraying units, and cooperate with the first sliding block that can move up and down and the first clamping plate that can rotate, realize the overturning of workpiece, the spraying of preservative on both sides of workpiece is realized in one conveying, improve the efficiency of the preservative spray device.

Description

Technical Field

[0001] This utility model relates to the field of spray device technology, specifically to a preservative spray device. Background Technology

[0002] Preservatives are widely used in industrial production and daily life. Applying preservatives by spraying can achieve uniform coverage and improve the efficiency of corrosion prevention.

[0003] A search revealed a patent, CN218360254U, which discloses a corrosion-resistant spraying device for switch production. This device includes a conveying mechanism for transporting switches and a blower mechanism mounted on the conveying mechanism for accelerating drying. It also includes a spraying mechanism for spraying the corrosion-resistant agent mounted on one side of the blower mechanism and a dust-removing mechanism mounted on the other side of the spraying mechanism for brushing away dust from the switch surface. The spraying mechanism includes a second fixed plate with two second lifting motors symmetrically mounted on its upper surface. The output ends of the second lifting motors are connected to second threaded rods, and a second slide is mounted on the outer side of the second threaded rods. A second slider is mounted on the second threaded rod. The beneficial effects are: the brushing mechanism reduces dust on the switch surface, improving corrosion resistance; the up-and-down movement ensures the processing of switches of various sizes, improving work efficiency; and the conveyor belt eliminates the need for manual handling of switches, saving manpower.

[0004] The aforementioned patents have significant beneficial effects, but in practical application, they still have the following shortcomings: In reality, many workpieces require anti-corrosion spraying, and many workpieces require double-sided anti-corrosion spraying. However, the anti-corrosion spraying device in the aforementioned comparative document can only spray one side of the workpiece. When anti-corrosion spraying is required on both sides, the workpiece needs to be flipped over and placed back into the anti-corrosion spraying device for spraying, which reduces the efficiency of the anti-corrosion spraying device. Therefore, there is an urgent need in the art to improve the anti-corrosion spraying device to overcome the shortcomings of the prior art. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a corrosion inhibitor spraying device that can spray corrosion inhibitors onto both sides of a workpiece in a single delivery, thereby improving the efficiency of the corrosion inhibitor spraying device.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a preservative spraying device, comprising a conveying device for conveying, wherein two sets of spraying units are sequentially arranged on the upper part of the conveying device in the conveying direction, and a flipping unit is provided between the two sets of spraying units; Each of the spraying units includes a spraying unit for spraying and a drying unit for drying, and the spraying unit and the drying unit are arranged in the conveying direction of the conveying device; The flipping unit includes a first support frame located on the upper part of the conveying device. Each side of the first support frame is provided with a first sliding block that penetrates the first support frame. The upper part of the first support frame is provided with two first drive motors that synchronously drive the two first sliding blocks to move up and down. A first telescopic device with a telescopic effect is rotatably connected to one side of the first sliding block. The telescopic end of the first telescopic device penetrates the first sliding block and a first clamping plate is fixedly installed at its end. A second drive motor for driving the first telescopic device to rotate is fixedly installed on one side of the first sliding block. A first visual positioning device for positioning is fixedly installed at the top inside the first support frame.

[0007] Preferably, the first support frame has a first sliding groove that is adapted to the first sliding block on both opposite sides. A first drive screw with one end fixedly installed to the output end of the first drive motor is rotatably connected in the first sliding groove. The first drive screw passes through the first sliding block and is threadedly connected to it.

[0008] Preferably, the conveying device has a first bearing seat fixedly installed on each of the opposite sides, and a synchronous third drive motor is fixedly installed at each end of the two first bearing seats. A second sliding block is fixedly installed at each end of the first bearing frame. A second sliding groove adapted to the second sliding block is opened on one side of the first bearing seat. A second drive screw with one end fixedly installed to the output end of the third drive motor is rotatably connected in the second sliding groove. The second drive screw passes through the second sliding block and is threadedly connected.

[0009] Preferably, a first gear is fixedly installed on the side of the first telescopic device, and a second gear that meshes with the first gear is fixedly installed at the output end of the second drive motor.

[0010] Preferably, the spraying unit includes a second support frame arranged in an inverted U-shape on the upper part of the conveying device. A movable seat is provided at the top of the second support frame, and a second telescopic device with a telescopic effect is provided at the lower part of the movable seat. A spray head is fixedly installed at the lower telescopic end of the second telescopic device. A storage box is fixedly installed on the upper part of the second support frame. An elastic connecting hose is fixedly installed between the storage box and the spray head. A fourth drive motor for driving the movable seat to move is fixedly installed on one side of the second support frame. A fifth drive motor for driving the second telescopic device to move is fixedly installed at one end of the movable seat. The spray head can move laterally and longitudinally. A second visual positioning device is fixedly installed on opposite side walls inside the second support frame.

[0011] Preferably, a third sliding block is fixedly installed on the upper part of the movable seat, and a third sliding groove adapted to the third sliding block is provided at the top of the second support frame. A third drive screw with one end fixedly installed to the output end of the fourth drive motor is rotatably connected in the third sliding groove. The third drive screw passes through the third sliding block and is threadedly connected to it.

[0012] Preferably, a fourth sliding block is fixedly installed on the upper end of the second telescopic device, and a fourth sliding groove adapted to the fourth sliding block is opened at the lower part of the movable seat. A fourth drive screw with one end fixedly installed to the output end of the fifth drive motor is rotatably connected in the fourth sliding groove. The fourth drive screw passes through the fourth sliding block and is threadedly connected to it.

[0013] Preferably, the conveying device has a second bearing seat adapted to the second bearing frame fixedly installed on opposite sides. A synchronous sixth drive motor is fixedly installed at the ends of the two second bearing seats. A fifth sliding block is fixedly installed at both ends of the second bearing frame. A fifth sliding groove adapted to the second bearing seat is opened on the upper part of the second bearing seat. A fifth drive screw with one end fixedly installed to the output end of the sixth drive motor is rotated in the fifth sliding groove. The fifth drive screw passes through the fifth sliding block and is threadedly connected to it.

[0014] Preferably, a third telescopic device with a telescopic effect is fixedly installed on both sides of the second support frame. The telescopic end of the third telescopic device passes through the second support frame and is fixedly installed with a second clamping plate adapted to the conveying device.

[0015] Preferably, the drying unit includes a drying hood fixedly installed on the upper part of the conveying device, a drying device with drying effect fixedly installed on the upper part of the drying hood, a shielding door plate adapted to the conveying device on the opposite side of the drying hood, an adjustment limiting groove extending into the drying hood and adapted to the shielding door plate on the upper part of the drying hood, and a positioning bolt with one end tightly abutting against the side of the shielding door plate on the opposite side of the drying hood.

[0016] To address the shortcomings of existing technologies, this utility model provides a preservative spraying device, overcoming the deficiencies of the prior art. The beneficial effects of this utility model are as follows: In this invention, by setting up two sets of spraying units, and cooperating with a first sliding block that can move up and down and a first clamping plate that can rotate, the workpiece can be flipped, and the workpiece can be sprayed with anti-corrosion agent on both sides in one conveying, thereby improving the efficiency of the anti-corrosion agent spraying device.

[0017] In this invention, the length of the movable seat and the length of the second support frame are cross-shaped. The fourth and fifth drive motors can move the spray head laterally and longitudinally to achieve all-round spraying of the upper part of the workpiece.

[0018] In this invention, by setting shielding door panels on both sides of the drying hood, and by adjusting the position of the shielding door panels inserted into the adjusting limit groove according to the height of the workpiece, the workpiece can be ensured to pass through and the rapid loss of temperature inside the drying hood can be effectively prevented, thereby improving the efficiency of drying the workpiece.

[0019] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0020] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the first support frame in this utility model; Figure 3 This is a schematic diagram of the drying unit in this utility model; Figure 4 This is a schematic diagram of the spray unit in this utility model; Figure 5 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 6 for Figure 4 Enlarged structural diagram at point B; Figure 7 for Figure 4 Enlarged structural diagram at point C.

[0022] In the diagram: 1. Conveying device; 2. Spraying unit; 3. Drying unit; 4. Tilting unit; 5. First support frame; 6. First sliding block; 7. First drive motor; 8. First telescopic device; 9. First clamping plate; 10. Second drive motor; 11. First vision positioning device; 12. First support seat; 13. Third drive motor; 14. Second sliding block; 15. Second sliding groove; 16. Second drive screw; 17. First gear; 18. Second gear; 19. Second support frame; 20. Movable seat; 21. Second telescopic device; 22. Spray head; 23. Fourth drive motor; 24. Fifth drive motor 25. Machine; 26. Storage box; 27. Connecting hose; 28. Second visual positioning device; 29. ​​Third sliding block; 30. Third sliding groove; 31. Third drive screw; 32. Fourth sliding block; 33. Fourth drive screw; 34. Second bearing seat; 35. Sixth drive motor; 36. Fifth sliding block; 37. Fifth sliding groove; 38. Fifth drive screw; 39. Third telescopic device; 40. Second clamping plate; 41. Drying hood; 42. Drying device; 43. Covering door panel; 44. Adjustment limit groove; 45. Positioning bolt; 46. First drive screw; 47. First sliding groove. Detailed Implementation

[0023] 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.

[0024] Example 1 Please see Figures 1-7A preservative spraying device includes a conveying device 1 for conveying, with two sets of spraying units arranged sequentially on the upper part of the conveying device 1 in the conveying direction, and a flipping unit 4 between the two sets of spraying units; each set of spraying units includes a spraying unit 2 for spraying and a drying unit 3 for drying, the spraying unit 2 and the drying unit 3 being arranged in the conveying direction of the conveying device 1; the flipping unit 4 includes a first support frame 5 on the upper part of the conveying device 1, with first sliding blocks 6 penetrating the first support frame 5 on opposite sides of the first support frame 5, and two first drive motors 7 synchronously driving the two first sliding blocks 6 to move up and down on the upper part of the first support frame 5, with a first telescopic device 8 having a telescopic effect rotatably connected to one side of the first sliding block 6, the telescopic end of the first telescopic device 8 penetrating the first sliding block 6 and a first clamping plate 9 fixedly installed at its end, a second drive motor 10 for driving the first telescopic device 8 to rotate fixedly installed on one side of the first sliding block 6, and a first positioning sight fixedly installed at the top inside the first support frame 5. The positioning device 11 has a first sliding groove 47 that is adapted to the first sliding block 6 on each of the opposite sides of the first support frame 5. A first drive screw 46, one end of which is fixedly installed at the output end of the first drive motor 7, is rotatably connected in the first sliding groove 47. The first drive screw 46 passes through the first sliding block 6 and is threadedly connected to it. The conveying device 1 has a first support seat 12 that is fixedly installed on each of the opposite sides. A synchronous third drive motor 13 is fixedly installed at the ends of the two first support seats 12. A second sliding block 14 is fixedly installed at both ends of the first support frame 5. A second sliding groove 15 that is adapted to the second sliding block 14 is opened on one side of the first support seat 12. A second drive screw 16, one end of which is fixedly installed at the output end of the third drive motor 13, is rotatably connected in the second sliding groove 15. The second drive screw 16 passes through the second sliding block 14 and is threadedly connected to it. A first gear 17 is fixedly installed on the side of the first telescopic device 8. A second gear 18 that meshes with the first gear 17 is fixedly installed at the output end of the second drive motor 10.

[0025] Specifically, when a workpiece needs to be coated with a corrosion inhibitor, the workpiece is placed on a conveying device 1 and transported by the conveying device 1. The conveying device 1 is a known technology. The corrosion inhibitor is sprayed onto the upper part of the workpiece through a first spraying unit 2. The coated workpiece is then transported to a drying unit 3 to dry the corrosion inhibitor. Subsequently, the workpiece is transported to a flipping unit 4. The position of the workpiece on the conveying device 1 is identified by a first visual positioning device 11, which can be an industrial camera. It achieves the positioning of the workpiece on the conveying device 1 through image recognition and analysis. For precise workpiece positioning, after the first vision positioning device 11 identifies the workpiece position, the conveying device 1 stops conveying and activates two synchronized third drive motors 13. The output end of the third drive motor 13 drives the second drive screw 16 to rotate. When the second drive screw 16 rotates, it drives the second sliding block 14 to move within the second sliding groove 15. The two second sliding blocks 14 drive the first support frame 5 to move, moving the position of the first support frame 5 directly above the workpiece. Then, two synchronized first telescopic devices 8 are activated. The telescopic ends of the first telescopic devices 8 drive the first clamping plate 9 to move. The workpiece is clamped, and then two synchronized first drive motors 7 are simultaneously activated. The output of the first drive motor 7 drives the first drive screw 46 to rotate. When the first drive screw 46 rotates, it drives the first sliding block 6 to move upward in the first sliding groove 47, thus moving the workpiece upward. When the rising height is sufficient to flip the workpiece, the first sliding block 6 stops moving, and the second drive motor 10 is activated. The output of the second drive motor 10 drives the second gear 18 to rotate, which in turn drives the first gear 17 to rotate. The first gear 17 then drives the first telescopic device 8 to rotate, thereby flipping the workpiece. Then, the first sliding block 6 moves down and drives the two first clamping plates 9 away from the workpiece through the first telescopic device 8. The conveying device 1 continues to convey the workpiece to the bottom of the second spraying unit 2 and sprays the other side of it with the anti-corrosion agent. Then, it is dried by the second drying unit 3 and conveyed to the next processing station by the conveying device 1. By setting two sets of spraying units and cooperating with the first sliding block 6 that can move up and down and the first clamping plate 9 that can rotate, the workpiece can be flipped. The anti-corrosion agent can be sprayed on both sides of the workpiece in one conveying, which improves the efficiency of the anti-corrosion agent spraying device.

[0026] As a technical optimization of this utility model, the spray unit 2 includes a second support frame 19 arranged in an inverted U-shape on the upper part of the conveying device 1. A movable seat 20 is provided at the top inside the second support frame 19. A second telescopic device 21 with a telescopic effect is provided at the lower part of the movable seat 20. A spray head 22 is fixedly installed at the lower telescopic end of the second telescopic device 21. A storage box 25 is fixedly installed on the upper part of the second support frame 19. An elastic connecting hose 26 is fixedly installed between the storage box 25 and the spray head 22. A fourth [unclear - possibly a device] for driving the movable seat 20 to move is fixedly installed on one side of the second support frame 19. The drive motor 23 and the moving base 20 are each fixedly mounted with a fifth drive motor 24 for driving the second telescopic device 21. The spray head 22 can move laterally and longitudinally. The second visual positioning device 27 is fixedly mounted on opposite side walls inside the second support frame 19. A third sliding block 28 is fixedly mounted on the upper part of the moving base 20. The top of the second support frame 19 is provided with a third sliding groove 29 that matches the third sliding block 28. A third drive screw 30, one end of which is fixedly mounted to the output end of the fourth drive motor 23, is rotatably connected inside the third sliding groove 29. The third drive screw 30 passes through the third sliding groove 29. Block 28 is threadedly connected to it. A fourth sliding block 31 is fixedly installed on the upper end of the second telescopic device 21. A fourth sliding groove 32 adapted to the fourth sliding block 31 is opened at the lower part of the movable seat 20. A fourth drive screw 33, one end of which is fixedly installed to the output end of the fifth drive motor 24, is rotatably connected in the fourth sliding groove 32. The fourth drive screw 33 passes through the fourth sliding block 31 and is threadedly connected to it. A second bearing seat 34 adapted to the second bearing frame 19 is fixedly installed on the opposite side of the conveying device 1. A synchronous sixth drive motor 35 is fixedly installed at the ends of both second bearing seats 34. Both ends of the second support frame 19 are fixedly installed with fifth sliding blocks 36. The upper part of the second support seat 34 is provided with a fifth sliding groove 37 adapted to the second support seat 34. The fifth drive screw 38 is fixedly installed in the fifth sliding groove 37 with one rotating end fixedly connected to the output end of the sixth drive motor 35. The fifth drive screw 38 passes through the fifth sliding block 36 and is threadedly connected to it. Both ends of the second support frame 19 are fixedly installed with a third telescopic device 39 with telescopic effect. The telescopic end of the third telescopic device 39 passes through the second support frame 19 and is fixedly installed with a second clamping plate 40 adapted to the conveying device 1.

[0027] Specifically, the position of the workpiece conveyed on the conveying device 1 is identified by the second visual positioning device 27. The second visual positioning device 27 can be an industrial camera, which achieves precise positioning of the workpiece conveyed on the conveying device 1 through image recognition and analysis. After the workpiece position is identified, two sixth drive motors 35 with synchronous effect are activated. The output end of the sixth drive motor 35 drives the fifth drive screw 38 to rotate. When the fifth drive screw 38 rotates, it drives the fifth sliding block 36 to move in the fifth sliding groove 37. The two fifth sliding blocks 36 drive the second support frame 19 to move, moving the position of the second support frame 19 to a position suitable for the workpiece. The third telescopic device 39 is activated. The telescopic end of the third telescopic device 39 drives the second clamping plate 40 to move. The two second clamping plates 40 position the workpiece on the conveying device 1. The second telescopic device 21 is activated. The telescopic end of the second telescopic device 21 drives the spray... The head 22 moves down, activating the preservative delivery pump in the storage tank 25 and delivering the preservative to the spray head 22 through the connecting hose 26. The preservative is then sprayed onto the upper part of the workpiece through the spray head 22. Simultaneously, the fourth drive motor 23 is activated, and its output drives the third drive screw 30 to rotate. When the third drive screw 30 rotates, it drives the third sliding block 28 to move within the third sliding groove 29. The third sliding block 28 then moves the moving seat 20. The fifth drive motor 24 is activated, and its output drives the fourth drive screw 33 to rotate. When the fourth drive screw 33 rotates, it drives the fourth sliding block 31 to move within the fourth sliding groove 32. The fourth sliding block 31 then moves the second telescopic device 21. The length of the moving seat 20 and the length of the second support frame 19 form a cross shape, thus enabling the spray head 22 to move laterally and longitudinally, achieving all-around spraying of the upper part of the workpiece.

[0028] As a technical optimization of this utility model, the drying unit 3 includes a drying hood 41 fixedly installed on the upper part of the conveying device 1. A drying device 42 with drying effect is fixedly installed on the upper part of the drying hood 41. A shielding door plate 43 adapted to the conveying device 1 is provided on the opposite side of the drying hood 41. An adjustment limiting groove 44 extending into the drying hood 41 and adapted to the shielding door plate 43 is opened on the upper part of the drying hood 41. A positioning bolt 45 with one end tightly abutting against the side of the shielding door plate 43 is threaded to the opposite side of the drying hood 41.

[0029] Specifically, the drying device 42 can be a hot air circulating drying device or an infrared drying device, etc. After the workpiece is conveyed into the drying hood 41, the drying device 42 can quickly dry the anti-corrosion agent on the upper part of the workpiece. At the same time, by setting two shielding door plates 43, the temperature loss inside the drying hood 41 is effectively reduced. The position of the shielding door plate 43 inserted in the adjustment limit groove 44 can be adjusted according to the height of the workpiece. By locking the positioning bolt 45, one end of the positioning bolt 45 is tightly pressed against one side of the shielding door plate 43 to limit and fix the shielding door plate 43, ensuring that the workpiece can pass through and effectively preventing the rapid loss of temperature inside the drying hood 41.

[0030] All of the electrical products mentioned above can be purchased from the market. They are mature technologies and have been fully disclosed, so they will not be repeated in the instruction manual. All of the electrical products mentioned above are equipped with power cords, and they are electrically connected to the external main controller and 220V phase voltage (or 380V line voltage) through the power cords. The main controller can be a conventional known device such as a computer that plays a control role.

[0031] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A preservative spraying device, comprising a conveying device (1) for conveying, characterized in that, The upper part of the conveying device (1) is provided with two sets of spraying units in the conveying direction, and a flipping unit (4) is provided between the two sets of spraying units. Each of the spraying units includes a spraying unit (2) for spraying and a drying unit (3) for drying, the spraying unit (2) and the drying unit (3) being arranged in the conveying direction of the conveying device (1); The flipping unit (4) includes a first support frame (5) on the upper part of the conveying device (1). The first support frame (5) has a first sliding block (6) on each opposite side that passes through the first support frame (5). The upper part of the first support frame (5) is provided with two first drive motors (7) that synchronously drive the two first sliding blocks (6) to move up and down. A first telescopic device (8) with a telescopic effect is rotatably connected to one side of the first sliding block (6). The telescopic end of the first telescopic device (8) passes through the first sliding block (6) and a first clamping plate (9) is fixedly installed at its end. A second drive motor (10) for driving the first telescopic device (8) to rotate is fixedly installed on one side of the first sliding block (6). A first visual positioning device (11) for positioning is fixedly installed at the top inside the first support frame (5).

2. The preservative spraying device according to claim 1, characterized in that, The first support frame (5) has a first sliding groove (47) that is adapted to the first sliding block (6) on both sides. A first drive screw (46) with one end fixedly installed to the output end of the first drive motor (7) is rotatably connected in the first sliding groove (47). The first drive screw (46) passes through the first sliding block (6) and is threadedly connected to it.

3. The preservative spraying device according to claim 1, characterized in that, The conveying device (1) has a first bearing seat (12) fixedly installed on each of the opposite sides. A synchronous third drive motor (13) is fixedly installed at the ends of the two first bearing seats (12). A second sliding block (14) is fixedly installed at both ends of the first bearing frame (5). A second sliding groove (15) adapted to the second sliding block (14) is opened on one side of the first bearing seat (12). A second drive screw (16) with one end fixedly installed to the output end of the third drive motor (13) is rotatably connected in the second sliding groove (15). The second drive screw (16) passes through the second sliding block (14) and is threaded.

4. The preservative spraying device according to claim 1, characterized in that, The first telescopic device (8) has a first gear (17) fixedly installed on its side, and the second drive motor (10) has a second gear (18) fixedly installed at its output end that meshes with the first gear (17).

5. The preservative spraying device according to claim 1, characterized in that, The spray unit (2) includes a second support frame (19) located on the upper part of the conveying device (1) and in the shape of an inverted U. The top of the second support frame (19) is provided with a movable seat (20). The lower part of the movable seat (20) is provided with a second telescopic device (21) with a telescopic effect. The lower end of the telescopic device (21) is fixedly installed with a spray head (22). The upper part of the second support frame (19) is fixedly installed with a storage box (25). A flexible connecting hose (26) is fixedly installed between the storage box (25) and the spray head (22). A fourth drive motor (23) for driving the movable seat (20) to move is fixedly installed on one side of the second support frame (19). A fifth drive motor (24) for driving the second telescopic device (21) to move is fixedly installed at one end of the movable seat (20). The spray head (22) can move laterally and longitudinally. A second visual positioning device (27) is fixedly installed on the opposite side walls inside the second support frame (19).

6. The preservative spraying device according to claim 5, characterized in that, A third sliding block (28) is fixedly installed on the upper part of the movable seat (20). The top of the second support frame (19) is provided with a third sliding groove (29) that is adapted to the third sliding block (28). A third drive screw (30) with one end fixedly installed to the output end of the fourth drive motor (23) is rotatably connected in the third sliding groove (29). The third drive screw (30) passes through the third sliding block (28) and is threadedly connected to it.

7. The preservative spraying device according to claim 5, characterized in that, The upper end of the second telescopic device (21) is fixedly installed with a fourth sliding block (31). The lower part of the movable seat (20) is provided with a fourth sliding groove (32) that is adapted to the fourth sliding block (31). A fourth drive screw (33) with one end fixedly installed to the output end of the fifth drive motor (24) is rotatably connected in the fourth sliding groove (32). The fourth drive screw (33) passes through the fourth sliding block (31) and is threadedly connected to it.

8. The preservative spraying device according to claim 5, characterized in that, The conveying device (1) has a second bearing seat (34) that is adapted to the second bearing frame (19) fixedly installed on the opposite side. A sixth drive motor (35) is fixedly installed at the ends of the two second bearing seats (34). A fifth sliding block (36) is fixedly installed at both ends of the second bearing frame (19). A fifth sliding groove (37) adapted to the second bearing seat (34) is opened on the upper part of the second bearing seat (34). A fifth drive screw (38) with one end fixedly installed to the output end of the sixth drive motor (35) is rotated in the fifth sliding groove (37). The fifth drive screw (38) passes through the fifth sliding block (36) and is threadedly connected to it.

9. A preservative spraying device according to claim 5, characterized in that, The second support frame (19) has a third telescopic device (39) with telescopic effect fixedly installed on both sides. The telescopic end of the third telescopic device (39) passes through the second support frame (19) and is fixedly installed with a second clamping plate (40) adapted to the conveying device (1).

10. A preservative spraying device according to claim 1, characterized in that, The drying unit (3) includes a drying hood (41) fixedly installed on the upper part of the conveying device (1). A drying device (42) with drying effect is fixedly installed on the upper part of the drying hood (41). A shielding door (43) adapted to the conveying device (1) is provided on the opposite side of the drying hood (41). An adjustment limiting groove (44) extending into the drying hood (41) and adapted to the shielding door (43) is provided on the upper part of the drying hood (41). A positioning bolt (45) with one end tightly abutting the side of the shielding door (43) is threaded to the opposite side of the drying hood (41).

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