Automatic enameling line for electric heating tubes

Abstract

An automatic enameling line for electric heating tubes, comprising an automatic conveying line, a loading area, a wet enameling automatic dipping area, a glaze cleaning area, a wet enameling drying furnace, an enameling firing furnace, a cooling area, and an unloading area arranged in sequence along the conveying direction of the automatic conveying line. The automatic conveying line includes a conveying chain, jig square tubes arranged on both sides of the conveying chain along the conveying direction of the conveying chain, a number of flip-and-rotate jig structures arranged on both sides of the conveying chain along the arrangement of the jig square tubes, a sprocket structure for supporting and driving the operation of the conveying chain, and a power source for providing power to the sprocket structure. The number of flip-and-rotate jig structures can automatically flip and rotate on the jig square tubes. Therefore, the present invention has the advantages of higher automation, more labor-saving, higher production efficiency, higher product quality and qualification rate.

Description

Technical Field

[0001] The present invention relates to the field of enamel, and particularly to an automatic enamel line for electric heating tubes. Background Art

[0002] At present, the main enamel process for electric heating tubes in the market is manual dip enameling, wet enameling drying, and firing. The specific operation process is as follows: First, manually cover the parts of the electric heating tube that do not need to be enameled. Then, manually immerse the electric heating tube into a small tank filled with enamel glaze slurry, and swing the glaze slurry tank to glaze the electric heating tube. After glazing, turn the electric heating tube 180°C by hand to clean the excess glaze on the flange surface. After cleaning, hang it to drip glaze. Finally, manually dry the enameled electric heating tube or send it to the wet enameling drying furnace for drying in batches. Then, after drying is completed, put it into the enamel firing furnace for firing, and finally complete the production of enameling the electric heating tube.

[0003] However, the above-mentioned dip enameling production equipment and process for electric heating tubes have the following imperfections: First, the processes of dip enameling, turning the electric heating tube, wet enameling drying, and firing in the process are all fully manual operations, with low automation, low production efficiency, a large number of personnel required, and the product quality and qualification rate cannot be guaranteed. Second, using the traditional mode of suspension chain for wet enameling drying and firing will not only burn all the parts of the flange of the electric heating tube that do not need to be enameled, causing flange oxidation and thus affecting the service life. Third, after the electric heating tube is coated with enamel, it needs to be manually hung on a trolley to dry or pushed into the drying furnace and enamel firing furnace for drying and firing, or hung on the suspension chain and sent into the drying furnace and enamel firing furnace for drying and firing, resulting in low production efficiency and low product quality. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides an automatic enamel line for electric heating tubes with higher automation, more labor-saving, and higher production efficiency to the society.

[0005] The technical solution of the present invention is: to provide an automatic enamel line for electric heating tubes, including an automatic conveyor line, a loading area, a wet enameling automatic dip enameling area, a glaze cleaning area, a wet enameling drying furnace, an enamel firing furnace, a cooling area, and an unloading area arranged in sequence along the conveying direction of the automatic conveyor line. The automatic conveyor line includes a conveying chain, fixture square tubes arranged on both sides of the conveying chain along the conveying direction of the conveying chain, a number of flip-and-rotate fixture structures arranged on both sides of the conveying chain along the fixture square tubes, a sprocket structure for supporting and driving the operation of the conveying chain, and a power source for providing power to the sprocket structure. The number of flip-and-rotate fixture structures can automatically flip and rotate on the fixture square tubes.

[0006] As an improvement of the present invention, the flip-and-rotate fixture structure includes a mounting member connected to the conveyor chain, a connecting member rotatably connected to the mounting member, a fixture mounted on the connecting member, and a fixture guide wheel. The fixture guide wheel is located at one end of the fixture close to the connecting member, and the fixture guide wheel can travel within the fixture square tube.

[0007] As an improvement of the present invention, the sprocket structure includes a driving gear and a tensioning gear. The driving gear and the tensioning gear jointly support the conveyor chain, and the power source is connected to the driving gear and is used to drive the gear to rotate.

[0008] As an improvement of the present invention, the power source is a motor.

[0009] As an improvement of the present invention, the wet enameling automatic dipping area is provided with a dipping tank, and the area of the conveyor chain corresponding to the wet enameling automatic dipping area has a downward concave structure.

[0010] As an improvement of the present invention, it further includes a drying and inspection area, and the drying and inspection area is located between the wet enameling drying furnace and the enameling firing furnace.

[0011] As an improvement of the present invention, the automatic conveyor line is arranged in a height space area, and the workpieces can be conveyed upward or downward at different process positions, and can be automatically flipped and automatically rotated.

[0012] As an improvement of the present invention, it further includes a protective sleeve, and the protective sleeve is used to cover the surface of the workpiece.

[0013] Since the present invention includes an automatic conveying line, a loading area, a wet enameling automatic dipping area, a glaze cleaning area, a wet enameling drying furnace, an enameling firing furnace, a cooling area, and an unloading area are sequentially arranged along the conveying direction of the automatic conveying line. The automatic conveying line includes a conveying chain, fixture square tubes arranged along the conveying direction of the conveying chain on both sides of the conveying chain, a number of flip - and - self - rotating fixture structures arranged along the fixture square tubes on both sides of the conveying chain, a sprocket structure for supporting and driving the operation of the conveying chain, and a power source for providing power to the sprocket structure. The number of flip - and - self - rotating fixture structures can be automatically flipped on the fixture square tubes. When the present invention is in use, after the workpiece (electric heating tube) is loaded in the loading area, a protective sleeve is manually installed on the non - enameling surface in this loading area. Then, through the automatic conveying line, the electric heating tube enters the wet enameling automatic dipping area in a downstream immersion manner. During the immersion process, the surface of the electric heating tube is automatically coated with enamel. After leaving the tank, under the action of the automatic conveying line, the electric heating tube is flipped 180° upwards. At this time, it reaches the glaze cleaning area, which is convenient for workers to remove the protective sleeve and clean the glaze on the flange surface. The protective sleeve is removed by the staff, and then it passes through the wet enameling drying furnace and the enameling firing furnace again, passes through the cooling area, and finally is unloaded in the unloading area. The production line of the present invention can realize the automatic flipping and automatic rotation of the workpiece, as well as the automation of processes such as online dipping, drying, and firing. It has the advantages of higher automation, more labor - saving, higher production efficiency, higher product quality and qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention.

[0015] Figure 2 is Figure 1 a side view schematic diagram of...

[0016] Figure 3 is Figure 1 a top view schematic diagram of...

[0017] Figure 4 is a schematic diagram of the flipping process of the flip - and - self - rotating fixture structure.

[0018] Figure 5 is Figure 1 a partial structure schematic diagram of...

[0019] Figure 6 is Figure 5 a side view schematic diagram of...

[0020] Figure 7 is Figure 5 a top view schematic diagram of...

[0021] Figure 8 is Figure 5 a three - dimensional schematic diagram of...

[0022] Figure 9 It is a front view schematic diagram of the rotatable and self-rotating fixture structure after the protective cover is installed.

[0023] Figure 10 It is Figure 9 a three-dimensional schematic diagram of. Specific implementation manner

[0024] Please refer to Figures 1 to 10 , Figures 1 to 10Disclosed is an implementation of an automatic enameling line for electric heating tubes. An automatic enameling line for electric heating tubes includes an automatic conveyor line 1, a loading area 2, a wet enameling automatic dipping area 3, a glaze cleaning area 4, a wet enameling drying furnace 5, an enameling firing furnace 6, a cooling area 7, and an unloading area 8 arranged in sequence along the conveying direction of the automatic conveyor line 1. The loading area 2 is used for loading workpieces and putting protective sleeves 91 on the workpieces (the workpieces in the present invention are electric heating tubes 90). The automatic conveyor line 1 includes a conveyor chain 11, fixture square tubes 12 arranged on both sides of the conveyor chain 11 along the conveying direction of the conveyor chain 11, a number of flip - and - self - rotating fixture structures 13 arranged along the fixture square tubes 12 on both sides of the conveyor chain 11, a sprocket structure 14 for supporting and driving the operation of the conveyor chain 11, and a power source (not visible in the figure) for providing power to the sprocket structure 14. In the present invention, since workpieces are hung on both sides of the conveyor chain 11, fixture square tubes 12 and flip - and - self - rotating fixture structures 13 are provided on both sides. A number of the flip - and - self - rotating fixture structures 13 can automatically flip on the fixture square tubes 12. In the present invention, the fixture square tubes 12 are arranged in a gradually changing trajectory, specifically, to enable the flip - and - self - rotating fixture structures 13 to flip on the fixture square tubes 12. In the present invention, the flip - and - self - rotating fixture structures 13 are arranged at a predetermined interval. There are dozens or even hundreds of the flip - and - self - rotating fixture structures 13, and the specific number is set according to the length of the conveyor chain 11 and the production requirements of the manufacturer. The wet enameling automatic dipping area 3 is used for applying glaze, the glaze cleaning area 4 is used for cleaning the glaze, the wet enameling drying furnace 5 is used for drying the glaze on the surface of the workpiece, the enameling firing furnace 6 is used for firing the workpiece, the cooling area 7 is used for cooling the fired workpiece, and the unloading area 8 is used for unloading the fired workpiece. When the present invention is in use, after the workpiece (electric heating tube 90) is loaded in the loading area 2, an operator manually installs the protective sleeve 91 on the non - enameling surface of the electric heating tube 90 in the loading area 2. Then, through the automatic conveyor line 1, the electric heating tube 90 enters the dipping tank 31 of the wet enameling automatic dipping area 3 in a swimming - immersion manner. During the swimming - immersion process, the surface of the electric heating tube 90 is automatically coated with enamel. After leaving the tank, under the action of the conveyor chain 11 and the flip - and - self - rotating fixture structures 13, the electric heating tube 90 is flipped 180° upwards. At this time, it reaches the glaze cleaning area 4, which is convenient for workers to remove the protective sleeve 91 and clean the glaze on the flange surface. The operator removes the protective sleeve 91, and then passes through the wet enameling drying furnace 5 and the enameling firing furnace 6 again, passes through the cooling area 7, and finally unloads the workpiece in the unloading area 8. Compared with the prior art, the production line of the present invention can realize the automatic flipping of workpieces and the automatic on - line entry and exit of process areas such as the dipping area, drying area, and firing area, and has the advantages of higher automation, more labor - saving, higher production efficiency, and higher product quality and qualification rate.

[0025] In the present invention, preferably, the wet enameling drying furnace 5 is sequentially provided with a first heat insulation zone 51, a drying zone 52, and a second heat insulation zone 53 along the conveying direction of the automatic conveying line 1. Preferably, the drying zone 52 is used for drying the workpiece at 100°C for 8 minutes.

[0026] In the present invention, the enameling firing furnace 6 is sequentially provided with a third heat insulation zone 61, a firing zone 62, and a fourth heat insulation zone 63 along the conveying direction of the automatic conveying line 1. Preferably, the firing zone 62 is used for firing the workpiece at 850°C for 6 minutes.

[0027] In the present invention, preferably, the rotatable and self-rotating jig structure 13 includes a mounting member 131 connected to the conveying chain 11, a connecting member 132 rotatably connected to the mounting member 131, a jig 133 mounted on the connecting member 132, and a jig guide wheel 134). The jig guide wheel 134 is located at one end of the jig 133 close to the connecting member 132. The jig guide wheel 134 can travel within the jig square tube 12. The realization of the flipping of the workpiece in the present invention is as follows: the jig guide wheel 134 travels along the jig square tube 12, and the direction of the jig square tube 12 is in a gradually changing state. By means of the gradually changing jig square tube 12, the jig guide wheel 134 changes its trajectory, so as to realize flipping along the flipping point P, as Figure 4 shown, for the flipping process of the workpiece 90, A is the normal hanging state, B is the state after flipping 45°, C is the state after flipping 90°, D is the state after flipping 135°, and E is the state after flipping 180°. The structural design for realizing the flipping of the electric heating tube 90 in the present invention is ingenious. Moreover, it not only does not require manual flipping, but also does not require an additional power source to realize flipping, saving manpower and energy, and at the same time achieving high efficiency.

[0028] In the present invention, preferably, the sprocket structure 14 includes a driving gear 141 and a tensioning gear 142. The driving gear 141 and the tensioning gear 142 jointly support the conveying chain 11. The power source is connected to the driving gear 141 and is used to drive the driving gear 141 to rotate. Specifically, in the present invention, preferably, the power source is a motor. Of course, it can also be other power sources, which will not be elaborated one by one in the present invention.

[0029] In the present invention, preferably, the wet enameling automatic dipping zone 3 is provided with a dipping tank 31. The area of the conveying chain 11 corresponding to the wet enameling automatic dipping zone 3 has a downward concave structure. The advantage of such a design is that by means of downhill and uphill, the electric heating tube can enter and exit the dipping tank 31, realizing dipping of the electric heating tube without manual picking and placing, saving manpower, and at the same time not requiring an additional power source, which is more environmentally friendly.

[0030] In the present invention, preferably, it further includes a drying and inspection zone 50, and the drying and inspection zone 50 is located between the wet enameling drying furnace 5 and the enameling firing furnace 6.

[0031] In the present invention, preferably, the automatic conveyor line 1 is arranged in a height space area, and the workpieces can be conveyed upward or downward at different process positions, and can be automatically flipped and rotated. The advantage of such a design is that it can save more space.

[0032] In the present invention, preferably, it further includes a protective sleeve 91, and the protective sleeve 91 is used to sleeve on the surface of the electric heating tube 90. In the present invention, the protective sleeve is a universal protective sleeve, and the operation is more convenient.

[0033] In the present invention, preferably, a protective sleeve return line 42 and a cleaning tank 41 are further provided on one side of the glaze cleaning area 4. The cleaning tank 41 is used for cleaning the removed protective sleeve 91, and the return line 42 is used to send the cleaned protective sleeve 91 back to the workpiece loading area 2 for the next batch of electric heating tubes 90 to be reused.

Claims

1. An automatic enameling line for electric heating tubes, characterized in that: It includes an automatic conveying line (1), a loading area (2), a wet enameling automatic dipping area (3), a clear glaze area (4), a wet enameling drying furnace (5), an enameling firing furnace (6), a cooling area (7), and an unloading area (8) arranged in sequence along the conveying direction of the automatic conveying line (1). The automatic conveying line (1) includes a conveying chain (11), fixture square tubes (12) arranged on both sides of the conveying chain (11) along the conveying direction of the conveying chain (11), a number of flip - and - self - rotating fixture structures (13) arranged on both sides of the conveying chain (11) along the arrangement of the fixture square tubes (12), a sprocket structure (14) for supporting and driving the operation of the conveying chain (11), and a power source for providing power to the sprocket structure (14). The number of flip - and - self - rotating fixture structures (13) can be automatically flipped on the fixture square tubes (12). The flip - and - self - rotating fixture structure (13) includes a mounting member (131) connected to the conveying chain (11), a connecting member (132) rotatably connected to the mounting member (131), a fixture (133) installed on the connecting member (132), and a fixture guide wheel (134). The fixture guide wheel (134) is located at one end of the fixture (133) close to the connecting member (132), and the fixture guide wheel (134) can travel within the fixture square tube (12). The sprocket structure (14) includes a driving gear (141) and a tensioning gear (142). The driving gear (141) and the tensioning gear (142) jointly support the conveying chain (11), and the power source is connected to the driving gear (141) and is used to drive the driving gear (141) to rotate.

2. The automatic enameling line for electric heating tubes according to claim 1, characterized in that: The power source is a motor.

3. The automatic enameling line for electric heating tubes according to claim 2, wherein: The wet enameling automatic dipping area (3) is provided with a dipping tank (31), and the area of the conveying chain (11) corresponding to the wet enameling automatic dipping area (3) has a downward - concave structure.

4. The automatic enameling line for electric heating tubes according to any one of claims 1 to 3, characterized in that: It also includes a drying and inspection area (50), and the drying and inspection area (50) is located between the wet enameling drying furnace (5) and the enameling firing furnace (6).

5. The automatic enameling line for electric heating tubes according to any one of claims 1 to 3, characterized in that: The automatic conveying line (1) is arranged in a high - altitude space area.

6. The automatic enameling line for electric heating tubes according to any one of claims 1 to 3, characterized in that: It also includes a protective sleeve (91), and the protective sleeve (91) is used to cover the surface of the workpiece (90).

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