Clean tunnel furnace

Abstract

The utility model discloses a clean tunnel furnace which is used for solving the technical problems that in an existing tunnel furnace, due to the fact that dust and other impurities remain on a conveying line and a carrier, materials are contaminated by the impurities in the heating process, and the quality of the materials is poor. A feeding port and a discharging port are formed in the two opposite end portions of a machine box, the machine box comprises an upper layer portion and a lower layer portion, an oven is installed on the upper layer portion, and a water-cooling cleaning device, a brush cleaning device and an ultrasonic cleaning device are installed on the lower layer portion. The water-cooling cleaning device, the brush cleaning device and the ultrasonic cleaning device are sequentially arranged in the direction from the discharging opening to the feeding opening. The circulating conveying chain is installed in the machine box, a plurality of carriers arranged at intervals are installed on the circulating conveying chain, the carriers are used for loading materials to be subjected to high-temperature treatment, and the circulating conveying chain is driven to sequentially and circularly pass through the feeding port, the oven, the discharging port, the water-cooling cleaning device, the brush cleaning device and the ultrasonic cleaning device.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical manufacturing design, in particular to a clean tunnel furnace. Background Art

[0002] A tunnel furnace is a tunnel-type mechanical device that completes the heating of materials through heat conduction, convection, and radiation. Generally, a tunnel furnace device has a continuously operating conveyor line passing through the tunnel furnace body, and the materials complete the heating process in the tunnel furnace body, thereby achieving the automated function of continuous conveying and heating.

[0003] In the existing tunnel furnaces, the conveyor line and the carriers for loading materials are very likely to be contaminated with other impurities such as dust in the air. When the materials are undergoing high-temperature heating, the above-mentioned impurities are easily attached and fixed on the surface of the materials, resulting in uneven surfaces of the materials and seriously affecting the production quality of the materials.

[0004] Therefore, finding a technical solution that can solve the above technical problems has become an important research topic for those skilled in the art. Summary of the Utility Model

[0005] An embodiment of the utility model discloses a clean tunnel furnace, which is used to solve the technical problem that in the existing tunnel furnace, due to dust and other impurities remaining on the conveyor line and the carriers, the materials are contaminated with impurities during the heating process, resulting in poor material quality.

[0006] A clean tunnel furnace provided by the utility model includes a chassis, a baking furnace, a circulating conveyor chain, a water-cooled cleaning device, a brush cleaning device, and an ultrasonic cleaning device;

[0007] Upper and lower material ports are provided at opposite ends of the chassis. The chassis includes an upper layer and a lower layer. The baking furnace is installed on the upper layer, and the water-cooled cleaning device, the brush cleaning device, and the ultrasonic cleaning device are installed on the lower layer. The water-cooled cleaning device, the brush cleaning device, and the ultrasonic cleaning device are arranged in sequence from the lower material port to the upper material port;

[0008] The circulating conveyor chain is installed inside the chassis. A plurality of spaced carriers are installed on the circulating conveyor chain. The carriers are used to load materials to be subjected to high-temperature treatment. The circulating conveyor chain can be driven to sequentially circulate through the upper material port, the baking furnace, the lower material port, the water-cooled cleaning device, the brush cleaning device, and the ultrasonic cleaning device;

[0009] The water-cooled cleaning device is used to cool and wash the circulating conveyor chain and the carriers. The brush cleaning device is used to clean the circulating conveyor chain and the carriers with brushes. The ultrasonic cleaning device is used to ultrasonically clean the circulating conveyor chain and the carriers.

[0010] Optionally, high-temperature resistant protective covers are installed on opposite sides of the oven;

[0011] The side of the high-temperature resistant protective cover facing the inside of the oven is provided with an avoidance groove, and the circulating conveyor chain is located inside the high-temperature resistant protective cover and is driven to move inside the high-temperature resistant protective cover.

[0012] Optionally, a dust removal device for dust removal of the circulating conveyor chain is connected to the end of the high-temperature resistant protective cover close to the blanking port;

[0013] The dust removal device includes a dust removal pipe, a dust removal cover, and a dust removal machine;

[0014] The dust removal cover is communicated with the high-temperature resistant protective cover, the dust removal pipe is communicated with the dust removal cover, and the dust removal cover is connected to the dust removal machine through the dust removal pipe.

[0015] Optionally, the water-cooled cleaning device includes a water tank, a first water inlet pipe, and a first water outlet pipe;

[0016] Both the first water inlet pipe and the first water outlet pipe are communicated with the water tank, and the water tank is filled with cooling water for cooling and cleaning the circulating conveyor chain and the carrier.

[0017] Optionally, the brush cleaning device includes a box body, an upper rolling brush, and a lower rolling brush;

[0018] An inlet for the circulating conveyor chain to enter and an outlet for the circulating conveyor chain to leave are respectively arranged at opposite ends of the box body. The upper rolling brush and the lower rolling brush are both rotatably connected inside the box body. The upper rolling brush is located above the lower rolling brush. A cleaning channel for the circulating conveyor chain to pass through is left between the upper rolling brush and the lower rolling brush. Both the upper rolling brush and the lower rolling brush are connected with driving parts.

[0019] Optionally, the ultrasonic cleaning device includes a water tank, a second water inlet pipe, a second water outlet pipe, a cold air knife, and a hot air knife;

[0020] The water tank is connected to the second water inlet pipe and the second water outlet pipe. The water tank is filled with cooling water. An ultrasonic oscillator is installed on the outer bottom wall of the water tank. A top cover is installed on the top of the water tank. The cold air knife and the hot air knife are installed on the inner top wall of the top cover. And the cold air knife and the hot air knife are arranged in sequence according to the moving direction of the circulating conveyor chain.

[0021] Optionally, a dust removal air knife and a plasma air curtain are also installed on the chassis;

[0022] The dust removal air knife and the plasma air curtain are located at the feeding port;

[0023] The plasma air curtain includes a support frame and a plurality of air outlets disposed on the support frame. The air outlet ends of the air outlets are arranged downward, and the plurality of air outlets blow out plasma air simultaneously to form a curtain wall.

[0024] Optionally, a feeding positioning assembly and a discharging positioning assembly are further installed in the chassis. The feeding positioning assembly is installed at the feeding port, and the discharging positioning assembly is installed at the discharging port;

[0025] The feeding positioning assembly includes a first mounting frame and a first positioning protrusion. The first mounting frame is installed in the chassis, and the first positioning protrusion is installed on the first mounting frame. When the circulating conveyor chain and the carrier move to the feeding port, the first positioning protrusion abuts against the carrier to lift the carrier to a preset height;

[0026] The discharging positioning assembly includes a second mounting frame and a second positioning protrusion. The second mounting frame is installed in the chassis, and the second positioning protrusion is installed on the second mounting frame. When the circulating conveyor chain and the carrier move to the discharging port, the second positioning protrusion abuts against the carrier to lift the carrier to a preset height.

[0027] Optionally, a detection port and a positioning device are provided at a position of the chassis close to the discharging port. A displacement sensor is installed in the detection port, and an electric door is installed at the discharging port. The positioning device includes a positioning pin and a cylinder. The cylinder is installed on the chassis, and the piston rod of the cylinder is connected to the pin. The cylinder is used to drive the pin to be inserted into a positioning groove on the side of the carrier;

[0028] The displacement sensor is electrically connected to the electric door and the positioning device. When the displacement sensor detects that the carrier moves to the discharging port, the displacement sensor sends a control signal to the electric door and the positioning device. The cylinder drives the pin to be inserted into the positioning groove on the side of the carrier to limit the movement of the carrier, and the electric door opens for material discharging.

[0029] Optionally, a plurality of air extraction devices are installed on the top of the chassis;

[0030] The air extraction device includes an air extractor and an air extraction hood connected to the air extractor. The air extraction hood is communicated with the inside of the chassis.

[0031] Compared with the prior art, the present utility model has the following beneficial effects:

[0032] In the clean tunnel furnace of this embodiment, the circulating conveyor chain and the carrier enter the water-cooling cleaning device, the brush cleaning device, and the ultrasonic cleaning device in sequence after passing through the baking furnace. Among them, the water-cooling cleaning device is used to cool and wash the circulating conveyor chain and the carrier, the brush cleaning device is used to clean the circulating conveyor chain and the carrier with brushes, and the ultrasonic cleaning device is used to clean the circulating conveyor chain and the carrier ultrasonically. Through the above design, after the circulating conveyor chain and the carrier are cleaned by the water-cooling cleaning device, the brush cleaning device, and the ultrasonic cleaning device, dust and other impurities on the surfaces of the circulating conveyor chain and the carrier are removed completely, so as to ensure that the materials are not interfered by impurities during the subsequent high-temperature heating process and ensure the production quality of the materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 FIG. is a schematic structural diagram of a clean tunnel furnace provided by an embodiment of the present invention;

[0035] Figure 2 FIG. is a schematic structural diagram of a loading port of a clean tunnel furnace provided by an embodiment of the present invention;

[0036] Figure 3 FIG. is a schematic structural diagram of an unloading port of a clean tunnel furnace provided by an embodiment of the present invention;

[0037] Figure 4 FIG. is a schematic internal structure diagram of a clean tunnel furnace provided by an embodiment of the present invention;

[0038] Figure 5 FIG. is a schematic structural diagram of a water-cooling cleaning device of a clean tunnel furnace provided by an embodiment of the present invention;

[0039] Figure 6 FIG. is a schematic structural diagram of a brush cleaning device of a clean tunnel furnace provided by an embodiment of the present invention;

[0040] Figure 7 FIG. is a schematic structural diagram of an ultrasonic cleaning device of a clean tunnel furnace provided by an embodiment of the present invention;

[0041] Figure 8 FIG. is a schematic structural diagram of a positioning device of a clean tunnel furnace provided by an embodiment of the present invention;

[0042] Figure 9 Structural schematic diagram of a high-temperature resistant protective cover of a clean tunnel furnace provided by an embodiment of the present utility model;

[0043] Figure 10 Structural schematic diagram of a loading positioning assembly of a clean tunnel furnace provided by an embodiment of the present utility model;

[0044] Figure 11 Structural schematic diagram of a discharging positioning assembly of a clean tunnel furnace provided by an embodiment of the present utility model;

[0045] Illustration description: Chassis 1; Loading port 101; Discharging port 102; Circulating conveyor chain 2; Exhaust device 3; Carrier 4; Dust removal air knife 5; Plasma air curtain 6; Air outlet nozzle 601; Electric door 7; Displacement sensor 8; Positioning device 9; Cylinder 901; Pin 902; Oven 10; Water-cooled cleaning device 11; Water tank 1101; First water inlet pipe 1102; First water outlet pipe 1103; Brush cleaning device 12; Box body 1201; Upper rolling brush 1202; Lower rolling brush 1203; Ultrasonic cleaning device 13; Water tank 1301; Second water inlet pipe 1302; Second water outlet pipe 1303; High-temperature resistant protective cover 14; Dust removal device 15; Loading positioning assembly 16; Discharging positioning assembly 17. Detailed implementation manners

[0046] An embodiment of the present utility model discloses a clean tunnel furnace, which is used to solve the technical problem that in the existing tunnel furnace, due to dust and other impurities remaining on the conveyor line and the carrier, the material is contaminated with impurities during the heating process, resulting in poor quality of the material.

[0047] In order to enable those skilled in the art to better understand the solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0048] Please refer to Figures 1 to 11 , a clean tunnel furnace provided by an embodiment of the present utility model includes a chassis 1, an oven 10, a circulating conveyor chain 2, a water-cooled cleaning device 11, a brush cleaning device 12, and an ultrasonic cleaning device 13;

[0049] The opposite ends of the chassis 1 are provided with a loading port 101 and a discharging port 102. The chassis 1 includes an upper layer and a lower layer. The baking oven 10 is installed in the upper layer, and the water-cooling cleaning device 11, the brush cleaning device 12, and the ultrasonic cleaning device 13 are installed in the lower layer. The water-cooling cleaning device 11, the brush cleaning device 12, and the ultrasonic cleaning device 13 are arranged in sequence in the direction from the discharging port 102 to the loading port 101.

[0050] The circulating conveyor chain 2 is installed inside the chassis 1. A plurality of carriers 4 are installed on the circulating conveyor chain 2 at intervals. The carriers 4 are used for loading materials to be heat-treated at high temperature. The circulating conveyor chain 2 is driven to sequentially pass through the loading port 101, the baking oven 10, the discharging port 102, the water-cooling cleaning device 11, the brush cleaning device 12, and the ultrasonic cleaning device 13 in a cycle.

[0051] The water-cooling cleaning device 11 is used to cool and wash the circulating conveyor chain 2 and the carriers 4 with water. The brush cleaning device 12 is used to clean the circulating conveyor chain 2 and the carriers 4 with brushes. The ultrasonic cleaning device 13 is used to ultrasonically clean the circulating conveyor chain 2 and the carriers 4.

[0052] In the clean tunnel furnace of this embodiment, after the circulating conveyor chain 2 and the carriers 4 pass through the baking oven 10, they sequentially enter the water-cooling cleaning device 11, the brush cleaning device 12, and the ultrasonic cleaning device 13. Among them, the water-cooling cleaning device 11 is used to cool and wash the circulating conveyor chain 2 and the carriers 4 with water. The brush cleaning device 12 is used to clean the circulating conveyor chain 2 and the carriers 4 with brushes. The ultrasonic cleaning device 13 is used to ultrasonically clean the circulating conveyor chain 2 and the carriers 4. Through the above design, after the circulating conveyor chain 2 and the carriers 4 are cleaned by the water-cooling cleaning device 11, the brush cleaning device 12, and the ultrasonic cleaning device 13, dust and other impurities on the surfaces of the circulating conveyor chain 2 and the carriers 4 are removed, ensuring that the materials are not interfered by impurities during the subsequent high-temperature heating process and ensuring the production quality of the materials.

[0053] Furthermore, high-temperature resistant protective covers 14 are installed on opposite sides of the baking oven 10 in this embodiment.

[0054] The side of the high-temperature resistant protective cover 14 facing the inside of the baking oven 10 is provided with an avoidance groove. The circulating conveyor chain 2 is located inside the high-temperature resistant protective cover 14 and is driven to move inside the high-temperature resistant protective cover 14.

[0055] It should be noted that through the above design, the high-temperature resistant protective cover 14 blocks high-temperature air, preventing the circulating conveying chain 2 from being affected by high temperature and reducing its service life. Additionally, the above-mentioned high-temperature resistant protective cover 14 can be specifically made of high-temperature resistant ceramics.

[0056] Furthermore, at the end of the high-temperature resistant protective cover 14 in this embodiment close to the blanking port 102, a dust removal device 15 for dust removal of the circulating conveying chain 2 is connected;

[0057] The dust removal device 15 includes a dust removal pipe, a dust removal cover, and a dust removal machine;

[0058] The dust removal cover is communicated with the high-temperature resistant protective cover 14, the dust removal pipe is communicated with the dust removal cover, and the dust removal cover is connected to the dust removal machine through the dust removal pipe.

[0059] It should be noted that through the above design, when the circulating conveying chain 2 moves to the blanking port 102, the above-mentioned dust removal device 15 performs dust removal treatment on the circulating conveying chain 2, ensuring the cleanliness of the circulating conveying chain 2.

[0060] Furthermore, the water-cooled cleaning device 11 in this embodiment includes a water tank 1101, a first water inlet pipe 1102, and a first water outlet pipe 1103;

[0061] Both the first water inlet pipe 1102 and the first water outlet pipe 1103 are communicated with the water tank 1101, and the water tank 1101 is filled with cooling water for cooling and cleaning the circulating conveying chain 2 and the carrier 4.

[0062] It should be noted that through the above design, when the circulating conveying chain 2 and the carrier 4 leave the blanking port 102, they enter the water-cooled cleaning device 11. After being flushed by the cooling water, dust and other impurities on the circulating conveying chain 2 and the carrier 4 fall into the cooling water.

[0063] In addition, the above-mentioned water tank 1101 is preferably a constant temperature water tank 1101.

[0064] Furthermore, the brush cleaning device 12 in this embodiment includes a box body 1201, an upper rolling brush 1202, and a lower rolling brush 1203;

[0065] At opposite ends of the box body 1201, there are respectively an inlet for the circulating conveyor chain 2 to enter and an outlet for the circulating conveyor chain 2 to leave. The upper brush 1202 and the lower brush 1203 are both rotatably connected inside the box body 1201. The upper brush 1202 is located above the lower brush 1203. A cleaning channel for the circulating conveyor chain 2 to pass through is left between the upper brush 1202 and the lower brush 1203. The upper brush 1202 and the lower brush 1203 are both connected to a driving member.

[0066] It should be noted that through the above design, when the circulating conveyor chain 2 and the carrier 4 leave the water-cooled cleaning device 11, they enter the brush cleaning device 12. The upper brush 1202 and the lower brush 1203 in the brush cleaning device 12 are respectively driven to wash the top and bottom surfaces of the circulating conveyor chain 2 and the carrier 4 to ensure that there is no residue of dust and other impurities on the surfaces of the circulating conveyor chain 2 and the carrier 4.

[0067] Furthermore, the ultrasonic cleaning device 13 in this embodiment includes a water tank 1301, a second water inlet pipe 1302, a second water outlet pipe 1303, a cold air knife, and a hot air knife.

[0068] The water tank 1301 is connected to the second water inlet pipe 1302 and the second water outlet pipe 1303. The water tank 1301 is filled with cooling water. An ultrasonic oscillator is installed on the outer bottom wall of the water tank 1301. A top cover is installed on the top of the water tank 1301. The cold air knife and the hot air knife are installed on the inner top wall of the top cover. And the cold air knife and the hot air knife are arranged in sequence according to the moving direction of the circulating conveyor chain 2.

[0069] It should be noted that through the above design, when the circulating conveyor chain 2 and the carrier 4 enter the water tank 1301, the ultrasonic oscillator is started, so that the dust and other impurities on the circulating conveyor chain 2 and the carrier 4 fall into the water tank 1301, effectively ensuring the cleanliness of the circulating conveyor chain 2 and the carrier 4. When the circulating conveyor chain 2 and the carrier 4 are about to leave the water tank 1301, the cold air knife is used to blow off the water on the surfaces of the circulating conveyor chain 2 and the carrier 4. Then, the hot air knife is used to dry the circulating conveyor chain 2 and the carrier 4.

[0070] Furthermore, a dust removal air knife 5 and a plasma air curtain 6 are also installed on the chassis 1 in this embodiment.

[0071] The dust removal air knife 5 and the plasma air curtain 6 are located at the loading port 101.

[0072] The plasma air curtain 6 includes a support frame and a plurality of air outlets 601 arranged on the support frame. The air outlet ends of the air outlets 601 are arranged downward, and the plurality of air outlets 601 blow out plasma air simultaneously to form a curtain wall.

[0073] It should be noted that through the above design, the dust removal air knife 5 can further perform dust removal treatment on the circulating conveyor chain 2 and the carrier 4, while the plasma air curtain 6 is used to form an air curtain wall, so that dust and other impurities in the external air cannot enter the interior of the chassis 1.

[0074] Furthermore, a loading positioning component 16 and an unloading positioning component 17 are also installed in the chassis 1 of this embodiment. The loading positioning component 16 is installed at the loading port 101, and the unloading positioning component 17 is installed at the unloading port 102;

[0075] The loading positioning component 16 includes a first mounting frame and a first positioning protrusion. The first mounting frame is installed in the chassis 1, and the first positioning protrusion is installed on the first mounting frame. When the circulating conveyor chain 2 and the carrier 4 move to the loading port 101, the first positioning protrusion abuts against the carrier 4 to lift the carrier 4 to a preset height;

[0076] It should be noted that through the above design, it is convenient for the loading robot to load materials.

[0077] The unloading positioning component 17 includes a second mounting frame and a second positioning protrusion. The second mounting frame is installed in the chassis 1, and the second positioning protrusion is installed on the second mounting frame. When the circulating conveyor chain 2 and the carrier 4 move to the unloading port 102, the second positioning protrusion abuts against the carrier 4 to lift the carrier 4 to a preset height.

[0078] It should be noted that through the above design, it is convenient for the unloading robot to unload materials.

[0079] Furthermore, a detection port and a positioning device 9 are provided at a position of the chassis 1 close to the unloading port 102. A displacement sensor 8 is installed in the detection port, and an electric door 7 is installed at the unloading port 102. The positioning device 9 includes a positioning pin 902 and a cylinder 901. The cylinder 901 is installed on the chassis 1, and the piston rod of the cylinder 901 is connected to the pin 902. The cylinder 901 is used to drive the pin 902 to be inserted into a positioning groove on the side of the carrier 4;

[0080] The displacement sensor 8 is electrically connected to the electric door 7 and the positioning device 9. When the displacement sensor 8 detects that the carrier 4 moves to the blanking port 102, the displacement sensor 8 sends a control signal to the electric door 7 and the positioning device 9. The air cylinder 901 drives the latch 902 to engage into the positioning groove on the side of the carrier 4 to limit the movement of the carrier 4, and the electric door 7 is opened to allow the material to be discharged.

[0081] It should be noted that through the above design, when the carrier 4 moves to the blanking port 102, the displacement sensor 8 senses the carrier 4. Then, the latch 902 of the positioning device 9 is driven by the air cylinder 901 to engage into the positioning groove on the side of the carrier 4, thereby restricting the movement of the carrier 4. At this time, the electric door 7 is opened, and the blanking manipulator can grab and discharge the material on the carrier 4.

[0082] Furthermore, a plurality of exhaust devices 3 are installed on the top of the chassis 1 in this embodiment;

[0083] The exhaust device 3 includes an exhaust fan and an exhaust hood connected to the exhaust fan, and the exhaust hood communicates with the inside of the chassis 1.

[0084] It should be noted that through the above design, the exhaust device 3 can extract the hot air or waste inside the chassis 1 to prevent the hot air and waste from remaining inside the chassis 1.

[0085] The above has introduced in detail a kind of clean tunnel furnace provided by the present utility model. For those of ordinary skill in the art, according to the idea of the embodiments of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A clean tunnel furnace, characterized in that, It includes a chassis (1), an oven (10), a circulating conveyor chain (2), a water-cooled cleaning device (11), a brush cleaning device (12), and an ultrasonic cleaning device (13); At opposite ends of the chassis (1), a loading port (101) and an unloading port (102) are provided. The chassis (1) includes an upper layer and a lower layer. The oven (10) is installed in the upper layer, and the water-cooled cleaning device (11), the brush cleaning device (12), and the ultrasonic cleaning device (13) are installed in the lower layer. The water-cooled cleaning device (11), the brush cleaning device (12), and the ultrasonic cleaning device (13) are arranged in sequence in the direction from the unloading port (102) to the loading port (101); The circulating conveyor chain (2) is installed inside the chassis (1). A plurality of carriers (4) are installed on the circulating conveyor chain (2) at intervals. The carriers (4) are used to load materials to be heat-treated at high temperature. The circulating conveyor chain (2) is driven to circulate successively through the loading port (101), the oven (10), the unloading port (102), the water-cooled cleaning device (11), the brush cleaning device (12), and the ultrasonic cleaning device (13); The water-cooled cleaning device (11) is used to cool and wash the circulating conveyor chain (2) and the carriers (4). The brush cleaning device (12) is used to clean the circulating conveyor chain (2) and the carriers (4) with a brush. The ultrasonic cleaning device (13) is used to ultrasonically clean the circulating conveyor chain (2) and the carriers (4).

2. The clean tunnel furnace according to claim 1, characterized in that, High-temperature resistant protective covers (14) are installed on opposite sides of the oven (10); On the side of the high-temperature resistant protective cover (14) facing the inside of the oven (10), an avoidance groove is provided. The circulating conveyor chain (2) is located inside the high-temperature resistant protective cover (14) and is driven to move inside the high-temperature resistant protective cover (14).

3. The clean tunnel furnace according to claim 2, characterized in that, At the end of the high-temperature resistant protective cover (14) near the unloading port (102), a dust removal device (15) for dust removal of the circulating conveyor chain (2) is connected; The dust removal device (15) includes a dust removal pipe, a dust removal cover, and a dust removal machine; The dust removal cover is communicated with the high-temperature resistant protective cover (14), the dust removal pipe is communicated with the dust removal cover, and the dust removal cover is connected to the dust removal machine through the dust removal pipe.

4. The clean tunnel furnace according to claim 1, wherein, The water-cooled cleaning device (11) includes a water tank (1101), a first water inlet pipe (1102), and a first water outlet pipe (1103); Both the first water inlet pipe (1102) and the first water outlet pipe (1103) are communicated with the water tank (1101). Cooling water for cooling and cleaning the circulating conveyor chain (2) and the carriers (4) is loaded in the water tank (1101).

5. The clean tunnel furnace according to claim 1, characterized in that, The brush cleaning device (12) includes a box body (1201), an upper rolling brush (1202), and a lower rolling brush (1203); At opposite ends of the box body (1201), there are respectively an inlet for the circulating conveyor chain (2) to enter and an outlet for the circulating conveyor chain (2) to leave. The upper roller brush (1202) and the lower roller brush (1203) are both rotatably connected inside the box body (1201). The upper roller brush (1202) is located above the lower roller brush (1203). A cleaning passage for the circulating conveyor chain (2) to pass through is left between the upper roller brush (1202) and the lower roller brush (1203). Both the upper roller brush (1202) and the lower roller brush (1203) are connected to a driving member.

6. The clean tunnel furnace according to claim 1, wherein, The ultrasonic cleaning device (13) includes a water tank (1301), a second water inlet pipe (1302), a second water outlet pipe (1303), a cold air knife, and a hot air knife. The water tank (1301) is connected to the second water inlet pipe (1302) and the second water outlet pipe (1303). The water tank (1301) is filled with cooling water. An ultrasonic oscillator is installed on the outer bottom wall of the water tank (1301). A top cover is installed on the top of the water tank (1301). The cold air knife and the hot air knife are installed on the inner top wall of the top cover. And the cold air knife and the hot air knife are arranged in sequence according to the moving direction of the circulating conveyor chain (2).

7. The clean tunnel furnace according to claim 1, wherein A dust removal air knife (5) and a plasma air curtain (6) are also installed on the chassis (1). The dust removal air knife (5) and the plasma air curtain (6) are located at the loading port (101). The plasma air curtain (6) includes a support frame and a plurality of air outlets (601) arranged on the support frame. The air outlet ends of the air outlets (601) face downward. The plurality of air outlets (601) blow out plasma air simultaneously to form a curtain wall.

8. The clean tunnel furnace according to claim 1, wherein An upper material positioning component (16) and a lower material positioning component (17) are also installed inside the chassis (1). Among them, the upper material positioning component (16) is installed at the loading port (101), and the lower material positioning component (17) is installed at the unloading port (102). The upper material positioning component (16) includes a first mounting frame and a first positioning protrusion. The first mounting frame is installed inside the chassis (1), and the first positioning protrusion is installed on the first mounting frame. When the circulating conveyor chain (2) and the carrier (4) move to the loading port (101), the first positioning protrusion abuts against the carrier (4) to lift the carrier (4) to a preset height. The lower material positioning component (17) includes a second mounting frame and a second positioning protrusion. The second mounting frame is installed inside the chassis (1), and the second positioning protrusion is installed on the second mounting frame. When the circulating conveyor chain (2) and the carrier (4) move to the unloading port (102), the second positioning protrusion abuts against the carrier (4) to lift the carrier (4) to a preset height.

9. The clean tunnel furnace according to claim 1, characterized in that, A detection port and a positioning device (9) are provided at a position of the chassis (1) close to the material discharge port (102). A displacement sensor (8) is installed in the detection port. An electric door (7) is installed at the material discharge port (102). The positioning device (9) includes a positioning pin (902) and a cylinder (901). The cylinder (901) is installed on the chassis (1). The piston rod of the cylinder (901) is connected to the pin (902). The cylinder (901) is used to drive the pin (902) to be inserted into a positioning groove on the side of the carrier (4). The displacement sensor (8) is electrically connected to the electric door (7) and the positioning device (9). When the displacement sensor (8) detects that the carrier (4) moves to the material discharge port (102), the displacement sensor (8) sends a control signal to the electric door (7) and the positioning device (9). The cylinder (901) drives the pin (902) to be inserted into the positioning groove on the side of the carrier (4) to limit the movement of the carrier (4), and the electric door (7) is opened to allow the material to be discharged.

10. The clean tunnel furnace according to claim 1, characterized in that, A plurality of air extraction devices (3) are installed on the top of the chassis (1). The air extraction device (3) includes an air extractor and an air extraction hood connected to the air extractor. The air extraction hood communicates with the inside of the chassis (1).

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