A tunnel furnace for a spray coating line

Abstract

The utility model discloses a tunnel furnace for spraying production line relates to tunnel furnace technical field, including conveying strip, and the both sides of conveying strip are provided with a plurality of support frames staggeredly, and the support frame between is equipped with the tunnel, and the bottom surface of conveying strip is equipped with multiple groups of connecting columns, and the bottom end connecting assembly of connecting column is fixedly provided with the spraying part, and the one end of tunnel is provided with the feed inlet, and the other end of tunnel is provided with the discharge gate, the utility model discloses the cooperation of screw rod and second motor, and second motor drives the rotation of screw rod, and it is convenient to drive lifting piece and ultraviolet lamp column to move up and down, improves the flexibility of ultraviolet lamp column position adjustment, and then can realize the function of accurate adjustment ultraviolet irradiation distance according to different specifications spraying workpiece, finally solved the problem that the existing tunnel furnace ultraviolet lamp column position is fixed and leads to the temperature uneven of different workpieces to make temperature uneven to affect coating solidification quality, improves the stability and production efficiency of spraying product quality.

Description

Technical Field

[0001] This utility model relates to the field of tunnel furnace technology, and in particular to a tunnel furnace for a spray coating production line. Background Technology

[0002] In the field of industrial spraying production, tunnel ovens used in spraying production lines play a key role in spraying quality and production efficiency.

[0003] The existing traditional tunnel ovens use fixed positions for UV lamps used to cure coatings, which cannot be flexibly adjusted according to the height and thickness of the workpiece. When processing workpieces of different sizes, the distance between the UV lamp and the workpiece surface is difficult to match. Either the distance is too close, resulting in local over-curing and cracking of the coating, or the distance is too far, resulting in insufficient curing of the coating, which seriously affects the stability and consistency of the quality of the sprayed products. Therefore, it is necessary to improve the above-mentioned problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a tunnel furnace for a spray coating production line.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tunnel furnace for a spraying production line, comprising a conveyor bar, multiple support frames staggered on both sides of the conveyor bar, a tunnel between the support frames, multiple sets of connecting columns on the bottom surface of the conveyor bar, spraying components fixedly attached to the bottom end connecting components of the connecting columns, a feed inlet at one end of the tunnel, a discharge outlet at the other end of the tunnel, and a rectangular through groove between the feed inlet and the discharge outlet on the top surface of the tunnel.

[0006] Preferably, two lead screws are symmetrically arranged in the middle of both sides of the inner wall of the tunnel, and two guide rods are symmetrically arranged on both sides of the two lead screws. Lifting blocks are sleeved on the lead screws and guide rods, and ultraviolet lamp columns are installed on the opposite surface of the lifting blocks.

[0007] Preferably, the tunnel top surface is provided with multiple air outlet pipes symmetrically arranged on both sides of the rectangular through groove. The air outlet pipes are connected to the tunnel top surface. A first motor is installed at the top of the air outlet pipe, and the output shaft of the first motor is coaxially fixed to a fan located at the tunnel top surface.

[0008] Preferably, multiple hot air vents are evenly distributed on the bottom surface of the tunnel, and an air inlet is provided at the bottom of one side of the tunnel.

[0009] Preferably, one end of the lead screw is coaxially fixed to a second motor installed at a location on the top surface of the tunnel.

[0010] Preferably, the connecting assembly includes a mounting block fixed to the end of the connecting column. The mounting block has grooves on both sides of its top surface. A pull plate is slidably mounted on the top surface of the groove. A locking block is fixedly mounted on the bottom end of the pull plate through the groove. The locking block has a C-shaped cross-section. The lower end of the locking block is inserted into the spraying part. A spring located inside the mounting block is fixedly mounted between the opposite surfaces of the upper end of the locking block.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the cooperation of a lead screw and a second motor, with the second motor driving the lead screw to rotate, facilitates the up-and-down movement of the lifting block and the ultraviolet lamp column, improving the flexibility of ultraviolet lamp column position adjustment. This enables precise adjustment of the ultraviolet irradiation distance according to different specifications of the workpiece to be coated. Furthermore, through the cooperation of the air outlet pipe, the first motor, and the fan, with the first motor driving the fan to rotate, it facilitates the exhaust of air from the tunnel and promotes air circulation, improving the uniformity of airflow within the furnace. This enables the maintenance of a stable temperature environment and air conditions within the furnace. Ultimately, this solves the problem of uneven temperature affecting coating curing quality due to the fixed position of the ultraviolet lamp column in existing tunnel furnaces, which makes it impossible to adapt to different workpieces. This improves the stability of the coated product quality and production efficiency. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 This is a first-view schematic diagram of the overall structure proposed in this utility model;

[0014] Figure 2 This is a first-view schematic diagram of the overall cross-sectional structure proposed in this utility model;

[0015] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the tunnel proposed in this utility model;

[0016] Figure 4 This is a partial cross-sectional view of the connecting component proposed in this utility model.

[0017] The components in the diagram are numbered as follows: 1. Conveyor bar; 2. Support frame; 3. Feed inlet; 4. Sprayed part; 5. Air inlet; 6. Tunnel; 7. Connecting column; 8. Locking block; 9. Pull plate; 10. Spring; 11. Hot air outlet; 12. First motor; 13. Air outlet duct; 14. Fan; 15. Ultraviolet lamp column; 16. Lead screw; 17. Second motor; 18. Guide rod. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example: See Figure 1-4 This utility model discloses a tunnel furnace for a spray coating production line, comprising a conveyor bar 1, multiple support frames 2 staggered on both sides of the conveyor bar 1, a tunnel 6 between the support frames 2, multiple sets of connecting columns 7 on the bottom surface of the conveyor bar 1, and spray coating components 4 fixedly attached to the bottom end of the connecting columns 7. A feed inlet 3 is opened at one end of the tunnel 6, and a discharge outlet is opened at the other end. A rectangular through groove is opened on the top surface of the tunnel 6 between the feed inlet 3 and the discharge outlet. The conveyor bar 1 and support frames 2 are made of high-strength, low-cost Q235B steel, and the tunnel 6 is made of SUS304 stainless steel plate. Through the cooperation of these three components, a stable, high-temperature resistant, and corrosion-resistant workpiece transport channel is constructed, facilitating the orderly movement of the sprayed workpiece within tunnel 6. The connecting column 7 and connecting assembly secure the sprayed part 4, and the use of suitable materials improves the stability of the spraying position, thereby enabling continuous spraying of the workpiece within tunnel 6. Two lead screws 16 are symmetrically arranged in the middle of both sides of the inner wall of tunnel 6, and two guide rods 18 are symmetrically arranged on both sides of the lead screws 16. Lifting blocks are sleeved on the lead screws 16 and guide rods 18, and ultraviolet lamp columns 15 are installed on the opposite surfaces of the lifting blocks. The lead screws 16, guide rods 18, and guide rods 18 are connected to lifting blocks. The guide rod 18 is made of quenched 45# steel, which has high hardness and strong wear resistance. Driven by the second motor 17 (model Y100L1-4), it rotates, and in conjunction with the guide rod 18, facilitates the precise vertical movement of the ultraviolet lamp column 15 by the lifting block. The ultraviolet lamp column 15 uses a UV-300W high-pressure mercury lamp, which has high luminous efficiency and stable ultraviolet intensity, improving the flexibility and precision of the ultraviolet lamp column 15's position adjustment. This allows for the adjustment of the ultraviolet irradiation distance according to different workpiece specifications. The top surface of tunnel 6 is located on both sides of the rectangular through-slot. Multiple air outlet pipes 13 are symmetrically arranged on both sides. The air outlet pipes 13 are connected to the top surface of the tunnel 6. A first motor 12 is installed at the top of the air outlet pipe 13. The output shaft of the first motor 12 is coaxially fixed to a fan 14 located at the top surface of the tunnel 6. The first motor 12, model Y90S-4, drives the fan 14 to rotate, so that the air in the tunnel 6 is discharged through the air outlet pipes 13, accelerating the air circulation in the furnace. The air outlet pipes 13 and other components are made of corrosion-resistant materials, which improves the uniformity of air circulation and ventilation efficiency in the tunnel 6, thereby enabling the function of maintaining a stable temperature environment and air quality in the furnace.

[0020] In this invention, multiple hot air inlets 11 are evenly distributed on the bottom surface of the tunnel 6, and an air inlet 5 is provided at one bottom side of the tunnel 6. External air enters through the air inlet 5 and is evenly distributed into the tunnel 6 through the hot air inlets 11. The hot air inlets 11 and the air inlet 5, made of high-temperature resistant materials, facilitate the formation of a stable hot air circulation system, improving the uniformity of temperature distribution and heating efficiency in the space constructed of high-temperature resistant materials inside the furnace. This enables the uniform heating of the sprayed workpiece and accelerates the drying and curing of the coating. One end of the lead screw 16 is coaxially fixed to a second motor 17 located on the top surface of the tunnel 6. The second motor 17, model Y100L1-4, provides power for the rotation of the lead screw 16. The lead screw 16 is made of quenched 45# steel, which facilitates precise control of the speed and number of rotations of the lead screw 16, thereby accurately adjusting the position of the lifting block and the ultraviolet lamp column 15, improving the automation and accuracy of the ultraviolet lamp column 15 adjustment. This system enables the electric and precise adjustment of the position of the ultraviolet lamp column 15. The connecting component includes a mounting block fixed to the end of the connecting column 7. The mounting block has grooves on both sides of its top surface. A pull plate 9 is slidably mounted on the top surface of the grooves. A locking block 8 is fixedly mounted on the bottom end of the pull plate 9 through the grooves. The locking block 8 has a C-shaped cross-section. The lower end of the locking block 8 is inserted into the spraying part 4. A spring 10 is fixedly mounted between the opposite surfaces of the upper ends of the locking block 8, located inside the mounting block. The pull plate 9 and the locking block 8 are made of polyoxymethylene (POM) engineering plastic with good self-lubrication and wear resistance. The spring 10 is made of 65Mn spring steel with excellent elasticity and long fatigue life. By pulling the pull plate 9, the locking block 8 moves to both sides against the elastic force of the spring 10, which facilitates the quick disassembly of the spraying part 4. After the pull plate 9 is released, the spring 10 returns to its original position and pushes the locking block 8 into the spraying part 4, realizing quick installation and improving the convenience and efficiency of replacing the spraying part 4. This enables the quick replacement and maintenance of the spraying part 4.

[0021] Working principle: When using this utility model, the workpiece to be sprayed is placed on the conveyor bar 1 and fed into the tunnel 6 through the feed port 3; the second motor 17 is started to drive the lead screw 16 to rotate, which drives the lifting block sleeved on the lead screw 16 and the guide rod 18 to move, adjusting the position of the ultraviolet lamp column 15 to match the workpiece; at the same time, the first motor 12 drives the fan 14 to rotate, so that the air in the tunnel 6 is discharged through the air outlet 13, and the external air enters from the air inlet 5, and is evenly dispersed through the hot air outlet 11 to form a circulation, maintaining the stable temperature inside the furnace; when changing the sprayed part 4, the pull plate 9 is pulled to both sides, which drives the locking block 8 to overcome the elastic force of the spring 10 and move to both sides to disengage from the sprayed part 4. When installing, the pull plate 9 is released, the spring 10 returns to its original position and pushes the locking block 8 to insert into the sprayed part 4 for fixation; the conveyor bar 1 continues to run, so that the workpiece completes the spraying, ultraviolet curing, hot air drying and other processes in sequence and is sent out from the discharge port; at this point, the device is in use.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A tunnel oven for a spray coating production line, comprising a conveyor belt (1), characterized in that: Multiple support frames (2) are staggered on both sides of the conveyor strip (1), and a tunnel (6) is provided between the support frames (2). Multiple sets of connecting columns (7) are provided on the bottom surface of the conveyor strip (1). A spraying part (4) is fixedly provided at the bottom end of the connecting column (7). A feed inlet (3) is opened at one end of the tunnel (6), and a discharge outlet is opened at the other end of the tunnel (6). A rectangular through groove is opened on the top surface of the tunnel (6) between the feed inlet (3) and the discharge outlet.

2. The tunnel furnace for a spray coating production line according to claim 1, characterized in that: Two lead screws (16) are symmetrically arranged in the middle of both sides of the inner wall of the tunnel (6). Two guide rods (18) are symmetrically arranged on both sides of the two lead screws (16). Lifting blocks are sleeved on the lead screws (16) and guide rods (18). Ultraviolet lamp columns (15) are installed on the opposite surface of the lifting blocks.

3. The tunnel furnace for a spray coating production line according to claim 2, characterized in that: The top surface of the tunnel (6) is symmetrically provided with multiple air outlet pipes (13) on both sides of the rectangular through groove. The air outlet pipes (13) are connected to the top surface inside the tunnel (6). A first motor (12) is installed at the top of the air outlet pipe (13). The output shaft of the first motor (12) is coaxially fixed to a fan (14) located at the top surface inside the tunnel (6).

4. A tunnel furnace for a spray coating production line according to claim 3, characterized in that: Multiple hot air vents (11) are evenly provided on the bottom surface of the tunnel (6), and an air inlet (5) is provided on one side of the bottom of the tunnel (6).

5. A tunnel furnace for a spray coating production line according to claim 4, characterized in that: One end of the lead screw (16) is coaxially fixed to a second motor (17) installed at a location on the top surface of the tunnel (6).

6. A tunnel furnace for a spray coating production line according to claim 5, characterized in that: The connecting assembly includes a mounting block fixed to the end of the connecting column (7). The mounting block has grooves on both sides of its top surface. A pull plate (9) is slidably provided on the top surface of the groove. A locking block (8) is fixedly provided at the bottom end of the pull plate (9) through the groove. The locking block (8) has a C-shaped cross section. The lower end of the locking block (8) is inserted into the spraying part (4). A spring (10) located inside the mounting block is fixedly provided between the opposite surfaces of the upper end of the locking block (8).

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