Welding device for double-metal wing plate of middle trough of scraper and double-metal wing plate

Abstract

The invention discloses a welding device for a scraper middle trough bimetallic wing plate and the bimetallic wing plate, and belongs to the technical field of wing plate welding devices.The welding device comprises a base, a first portal frame and a second portal frame are fixed to the base, and a cross arm is fixed between the first portal frame and the second portal frame; electric telescopic rods are symmetrically mounted on the lower surface of the cross arm, and an upper clamping mechanism is jointly fixed to output shafts of the two electric telescopic rods and used for clamping a bimetallic wing plate; a first moving mechanism and a second moving mechanism are arranged between the first portal frame and the second portal frame, a cleaning and polishing mechanism is fixed on the first moving mechanism, a carbon dioxide protection welding machine is mounted on the base, and a welding gun of the carbon dioxide protection welding machine is fixed on the second moving mechanism; the cleaning and welding functions are integrated, cleaning and welding are automatically completed, the time and labor of step-by-step operation are reduced, and the continuity and efficiency of the whole working process are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wing plate welding devices, and particularly relates to a welding device for a double-metal wing plate of a middle trough of a scraper conveyor and the double-metal wing plate. Background Art

[0002] The structural composition of a scraper conveyor includes a baffle, a trough side, a middle plate, a bottom plate, etc. Relevant statistical results show that the most severely damaged component of the scraper conveyor is the middle trough. The positions with the highest wear probability of the middle trough are the upper edge of the trough side, the middle plate, and the bottom plate. Among them, 90% of the wear occurs at the upper edge of the trough side. The wear problem of the middle trough is directly related to the service life of the entire scraper conveyor and is also closely related to the continuous and reliable production of the enterprise. When the middle trough is operating, the force-bearing situation is relatively complex and it bears the acting forces of coal material and scraper simultaneously, with relatively high requirements for the fatigue limit and strength of structural components, including the trough side, baffle, etc. However, the middle trough is still a severely worn component under unpredictable load conditions during operation.

[0003] The existing trough side is of an integral design structure. In order to reduce the wear of the upper edge of the trough side, a double-metal wing plate is currently designed to be applied to the upper edge of the middle trough. It is necessary to connect the wing plate to the middle trough by welding to improve the service life of local easily worn components. However, during the welding process, it is necessary to clean the material. Otherwise, the dirt and oxides on its surface will have an adverse impact on the welding quality. The cleaning requires removing the oil stain at the welding position and the surface oxides. Currently, the welding and cleaning require multiple devices to operate step by step, delaying work efficiency, and also consuming a lot of manpower for the transfer of materials. Summary of the Invention

[0004] The purpose of the present invention is to provide a welding device for a double-metal wing plate of a middle trough of a scraper conveyor and the double-metal wing plate, and solve the following technical problems: During the welding process, it is necessary to clean the material. Otherwise, the dirt and oxides on its surface will have an adverse impact on the welding quality. The cleaning requires removing the oil stain at the welding position and the surface oxides. Currently, the welding and cleaning require multiple devices to operate step by step, delaying work efficiency, and also consuming a lot of manpower for the transfer of materials.

[0005] The purpose of the present invention can be achieved by the following technical solutions: A welding device for a double-metal wing plate of a middle trough of a scraper conveyor includes a base. A first gantry and a second gantry are fixed on the base. A crossbar is fixed between the first gantry and the second gantry. Electric telescopic rods are symmetrically installed on the lower surface of the crossbar. The output shafts of the two electric telescopic rods are jointly fixed with an upper clamping mechanism for clamping the double-metal wing plate; A first moving mechanism and a second moving mechanism are arranged between the first gantry and the second gantry. A cleaning and grinding mechanism is fixed on the first moving mechanism. A carbon dioxide shielded welding machine is installed on the base, and the welding torch of the carbon dioxide shielded welding machine is fixed on the second moving mechanism. The cleaning and grinding mechanism includes two wiping cloths, a grinding assembly and a box body. The wiping cloths are used to remove the oil stains at the welding joints, the grinding assembly is used to remove the oxide scales at the welding joints, and a cleaning agent is arranged in the box body. When the first moving mechanism drives the cleaning and grinding mechanism to move, the box body provides the cleaning agent for the wiping cloths.

[0006] As a further scheme of the present invention: The cleaning and grinding mechanism further includes a mounting plate. The box body is fixed on one side of the mounting plate. A first liquid outlet pipe is connected to the bottom of the box body. One end of the first liquid outlet pipe is connected to a second liquid outlet pipe. Liquid outlet hole plates are fixed at both ends of the second liquid outlet pipe. The two wiping cloths are respectively fixed on the side walls far away from each other of the two liquid outlet hole plates. Pressure valves are installed at both ends of the second liquid outlet pipe.

[0007] As a further scheme of the present invention: Fixing rings are fixed at the top and bottom of one side wall of the mounting plate. A driving rod is movably sleeved between the two fixing rings. A driven rod is fixed on the driving rod. One end of the driven rod is fixed with a driven plate. The grinding assembly is fixed on the side wall of the driven plate.

[0008] As a further scheme of the present invention: The grinding assembly includes a driving box. The driving box is fixed on the side wall of the driven plate through a connecting rod. Rotating shafts are rotatably installed at the top and bottom of the driving box. Grinding discs are installed at the ends of the two rotating shafts far away from each other. First bevel gears are installed at the ends of the two rotating shafts close to one end. A grinding motor is installed on one side of the driving box. The output shaft of the grinding motor is connected with a second bevel gear. The second bevel gear meshes with the first bevel gear.

[0009] As a further scheme of the present invention: A U-shaped pipe is further fixed on the driven plate. Branch pipes are fixed at both ends of the U-shaped pipe. Air outlet nozzles are uniformly arranged along the length direction on one side of the branch pipes. The U-shaped pipe is connected to an external air source through a hose.

[0010] As a further scheme of the present invention: The upper clamping mechanism includes two support plates. The two support plates are respectively connected to the output shafts of two electric telescopic rods. A third spring is connected to the bottom of the support plate. The bottoms of multiple third springs are jointly connected with a positioning plate. Multiple clamping components are fixed on the sides of the positioning plate and the base close to each other. The clamping component includes a fixed block. A screw is threadedly connected to the fixed block. One end of the screw is rotatably installed with a clamping block, and the other end is installed with a knob.

[0011] As a further solution of the present invention: a round-headed rod is fixed to the bottom of the active rod, a plurality of bumps are evenly installed on the upper surface of the base along the length direction, and the bumps are located directly below the round-headed rod. An air pump is installed on the side wall of the mounting plate. The air outlet pipe of the air pump is communicated with the box body. A first spring is sleeved on the piston rod of the air pump. The inner surface of the top wall of the box body is connected with a second spring. The bottom of the second spring is connected with a piston plate. The piston plate is located above the cleaning agent. A push block is fixed to one side of the active rod. A pressure relief pipe is connected to the top of the box body, and a liquid adding pipe is connected to one side of the box body. Sealing blocks are installed on both the pressure relief pipe and the liquid adding pipe.

[0012] As a further solution of the present invention: both the first moving mechanism and the second moving mechanism are composed of a lead screw, a moving block, a guide rod and a driving motor. The two ends of the lead screw are respectively rotatably connected to the first gantry and the second gantry. The moving block is threadedly connected to the lead screw. The guide rod is movably connected to the moving block, and the two ends of the guide rod are respectively fixed to the first gantry and the second gantry. The driving motor is installed on the first gantry, and the output shaft of the driving motor is connected to the lead screw. One of the moving blocks is fixedly connected to the welding torch of the CO₂ shielded welding machine, and the other moving block is fixedly connected to the mounting plate.

[0013] A bimetallic wing plate is welded by using a welding device for the bimetallic wing plate in the middle trough of a scraper conveyor. The bimetallic wing plate is welded to the trough side by a CO₂ shielded welding machine. The bimetallic wing plate is produced by compounding two metal materials. The material of the welding part is 35SiMn alloy steel, and the material of the wear-resistant part is Cr26 high-chromium alloy.

[0014] Advantages of the present invention: (1) By integrating the cleaning and welding functions, the present invention realizes automatic processing. The first moving mechanism drives the cleaning and grinding mechanism to move. The wiping cloth and the grinding components cooperate to remove oil stains and some surface oxides, and then welding operations are carried out. The whole device automatically completes cleaning and welding through mechanical movement, reducing the time and manpower of step-by-step operations and improving the coherence and efficiency of the overall work process; (2) By setting structures such as the mounting plate, the first liquid outlet pipe, the second liquid outlet pipe, etc., the cleaning agent inside the box body automatically flows onto the wiping cloth, making the wiping cloth keep wet during the whole cleaning process and improving the cleaning effect; (3) The grinding component of the present invention is composed of structures such as a driving box, a driven plate, a rotating shaft, a first bevel gear and a second bevel gear. During the grinding process, the grinding motor drives the two grinding discs to rotate, and the welding surface is ground simultaneously, improving the grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 is the first - perspective structural schematic diagram of the whole invention; Figure 2 is the second - perspective structural schematic diagram of the whole invention; Figure 3 is the third - perspective structural schematic diagram of the whole invention; Figure 4 is the first - perspective structural schematic diagram of the cleaning and grinding mechanism of the invention; Figure 5 is the second - perspective structural schematic diagram of the cleaning and grinding mechanism of the invention; Figure 6 is the structural schematic diagram of the grinding assembly of the invention; Figure 7 is the structural schematic diagram of the upper clamping mechanism of the invention; Figure 8 is Figure 3 the enlarged view of part A in Figure 9 is the structural schematic diagram of the box body and the air pump of the invention.

[0017] In the figure: 1. Base; 2. First gantry; 3. Second gantry; 4. Cross - bar; 5. Electric telescopic rod; 6. Upper clamping mechanism; 601. Positioning plate; 602. Third spring; 603. Support plate; 604. Fixed block; 605. Screw; 606. Clamping block; 607. Knob; 7. First moving mechanism; 701. Lead screw; 702. Moving block; 703. Guide rod; 8. Cleaning and grinding mechanism; 801. Mounting plate; 802. Box body; 803. First liquid outlet pipe; 804. Second liquid outlet pipe; 805. Liquid outlet hole plate; 806. Wiping cloth; 807. Fixed ring; 808. Driving rod; 809. Driven rod; 810. Driven plate; 811. Grinding assembly; 812. U - shaped pipe; 813. Branch pipe; 814. Air outlet nozzle; 815. Round - headed rod; 816. Driving box; 817. Rotating shaft; 818. Grinding disc; 819. First bevel gear; 820. Grinding motor; 821. Second bevel gear; 822. Pushing block; 823. Air pump; 824. First spring; 825. Second spring; 826. Piston plate; 9. Carbon dioxide gas shielded welding machine; 10. Second moving mechanism; 11. Convex block.

[0018] The attached drawings are only for illustrative purposes and should not be construed as a limitation to the present invention; for better illustration of this embodiment, some components in the attached drawings are omitted, enlarged or reduced, which do not represent the dimensions and shapes of the actual products; for those skilled in the art, it is understandable that some well - known structures and their descriptions in the attached drawings may be omitted. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 to 5 As shown, the present invention is a welding device for a bimetallic wing plate of a scraper middle trough, including a base 1, on which a first gantry 2 and a second gantry 3 are fixed. A crossbar 4 is fixed between the first gantry 2 and the second gantry 3. Electric telescopic rods 5 are symmetrically installed on the lower surface of the crossbar 4. The output shafts of the two electric telescopic rods 5 are jointly fixed with an upper clamping mechanism 6 for clamping the bimetallic wing plate. A first moving mechanism 7 and a second moving mechanism 10 are arranged between the first gantry 2 and the second gantry 3. A cleaning and grinding mechanism 8 is fixed on the first moving mechanism 7. A carbon dioxide shielded welding machine 9 is installed on the base 1, and the welding torch of the carbon dioxide shielded welding machine 9 is fixed on the second moving mechanism 10. The cleaning and grinding mechanism 8 includes two wiping cloths 806, a grinding assembly 811, and a box body 802. The wiping cloth 806 is used to remove the oil stain at the welding position, and the grinding assembly 811 is used to remove the oxide scale at the welding position. A cleaning agent is arranged in the box body 802. When the first moving mechanism 7 drives the cleaning and grinding mechanism 8 to move, the box body 802 provides the cleaning agent for the wiping cloth 806. When in use, first clamp and fix the bimetallic wing plate through the upper clamping mechanism 6, then place the trough side on the base 1, use the electric telescopic rod 5 to adjust the position of the bimetallic wing plate first, so that the two wiping cloths 806 respectively contact the side surfaces of the bimetallic wing plate and the trough side close to each other. Drive the cleaning and grinding mechanism 8 to move through the first moving mechanism 7, first clean the oil stain, and then use the grinding assembly 811 to clean the oxide. Finally, the second moving mechanism 10 and the carbon dioxide shielded welding machine 10 cooperate to complete the welding operation, reducing the time and manpower of the step-by-step operation and improving the coherence and efficiency of the overall work process.

[0021] Refer to Figure 2 and Figure 4 As shown, the cleaning and grinding mechanism 8 further includes a mounting plate 801. The box body 802 is fixed on one side of the mounting plate 801. A first liquid outlet pipe 803 is connected to the bottom of the box body 802. One end of the first liquid outlet pipe 803 is connected to a second liquid outlet pipe 804. Liquid outlet hole plates 805 are fixed at both ends of the second liquid outlet pipe 804. The two wiping cloths 806 are respectively fixed on the side walls of the two liquid outlet hole plates 805 away from each other. Pressure valves are installed at both ends of the second liquid outlet pipe 804. The box body 802, the first liquid outlet pipe 803, the second liquid outlet pipe 804, and the liquid outlet hole plates 805 are used to stably provide the cleaning liquid for the wiping cloth 806 to ensure the cleaning effect.

[0022] Refer to Figure 5 On one side wall of the mounting plate 801, fixing rings 807 are fixed at both the top and the bottom. An active rod 808 is movably sleeved between the two fixing rings 807. A driven rod 809 is fixed on the active rod 808. One end of the driven rod 809 is fixed with a driven plate 810. A grinding assembly 811 is fixed on the side wall of the driven plate 810.

[0023] Refer to Figure 5 and Figure 6 The grinding assembly 811 includes a drive box 816. The drive box 816 is fixed on the side wall of the driven plate 810 through a connecting rod. Rotating shafts 817 are rotatably installed at both the top and the bottom of the drive box 816. Grinding discs 818 are installed at the ends of the two rotating shafts 817 away from each other. First bevel gears 819 are installed at the ends of the two rotating shafts 817 close to each other. A grinding motor 820 is installed on one side of the drive box 816. The output shaft of the grinding motor 820 is connected with a second bevel gear 821. The second bevel gear 821 meshes with the first bevel gear 819. A U-shaped pipe 812 is also fixed on the driven plate 810. Branch pipes 813 are fixed at both ends of the U-shaped pipe 812. Air outlet nozzles 814 are uniformly arranged along the length direction on one side of the branch pipes 813. The U-shaped pipe 812 is connected with an external air source through a hose. When grinding, the grinding motor 820 is started. The grinding motor 820 drives the second bevel gear 821 to rotate. The second bevel gear 821 meshes with the first bevel gear 819, thereby driving the two rotating shafts 817 and the grinding discs 818 to rotate to complete the grinding of the welding surface. And when grinding, the air blown out through the air outlet nozzles 814 blows away the waste chips generated by grinding.

[0024] Refer to Figure 1 and Figure 7 The upper clamping mechanism 6 includes two support plates 603. The two support plates 603 are respectively connected with the output shafts of the two electric telescopic rods 5. A third spring 602 is connected to the bottom of the support plate 603. The bottoms of multiple third springs 602 are jointly connected with a positioning plate 601. Multiple clamping components are fixed on the sides of the positioning plate 601 and the base 1 close to each other. The clamping component includes a fixed block 604. A screw rod 605 is threadedly connected to the fixed block 604. One end of the screw rod 605 is rotatably installed with a clamping block 606, and the other end is installed with a knob 607.

[0025] Refer to Figure 3 、 Figure 4 、 Figure 5 、 Figure 8 and Figure 9, a round head rod 815 is fixed to the bottom of the active rod 808. A plurality of bumps 11 are evenly installed on the upper surface of the base 1 along the length direction, and the bumps 11 are located directly below the round head rod 815. An air pump 823 is installed on the side wall of the mounting plate 801. The air outlet pipe of the air pump 823 is communicated with the box body 802. A first spring 824 is sleeved on the piston rod of the air pump 823. The inner surface of the top wall of the box body 802 is connected with a second spring 825. The bottom of the second spring 825 is connected with a piston plate 826. The piston plate 826 is located above the cleaning agent. A push block 822 is fixed to one side of the active rod 808. A pressure relief pipe is connected to the top of the box body 802. A liquid adding pipe is connected to one side of the box body 802. Sealing blocks are installed on both the pressure relief pipe and the liquid adding pipe; when the mounting plate 801 moves, since the round head rod 815 continuously contacts the bumps 11, the active rod 808 continuously bounces up and down, so as to inflate the box body 802 by using the air pump 823, and the cleaning agent can be automatically discharged while moving.

[0026] Refer to Figures 1 to 3 , both the first moving mechanism 7 and the second moving mechanism 10 are composed of a lead screw 701, a moving block 702, a guide rod 703 and a driving motor. The two ends of the lead screw 701 are respectively rotatably connected to the first gantry 2 and the second gantry 3. The moving block 702 is threadedly connected to the lead screw 701. The guide rod 703 is movably connected to the moving block 702, and the two ends of the guide rod 703 are respectively fixed to the first gantry 2 and the second gantry 3. The driving motor is installed on the first gantry 2, and the output shaft of the driving motor is connected to the lead screw 701. One of the moving blocks 702 is fixedly connected to the welding torch of the CO2 shielded arc welding machine 9, and the other moving block 702 is fixedly connected to the mounting plate 801; starting the driving motor to drive the lead screw 701 to rotate can make the moving block 702 move along the guide rod 703.

[0027] A bimetallic wing plate is welded by using a welding device for the bimetallic wing plate of the middle trough of a scraper conveyor. The bimetallic wing plate is welded to the trough side by the CO2 shielded arc welding machine 9. The bimetallic wing plate is produced by compounding two metal materials. The material of the welding part is 35SiMn alloy steel, and the material of the wear-resistant part is Cr26 high-chromium alloy. The wear resistance is improved under the condition of ensuring strength and toughness, and it can be widely used in coal mining production equipment under various geological conditions.

[0028] Working principle of the present invention: When in use, first clamp and fix the bimetallic wing plate through the upper clamping mechanism 6, then place the trough side on the base 1 and fix it through the clamping component on the base 1. Use the electric telescopic rod 5 to first adjust the position of the bimetallic wing plate so that the two wiping cloths 806 respectively contact the adjacent sides of the bimetallic wing plate and the trough side. Drive the cleaning and grinding mechanism 8 to move from one end of the bimetallic wing plate to the other end through the first moving mechanism 7. The two wiping cloths 806 first clean the oil stains, and then use the grinding component 811 to clean the oxides; When the cleaning and grinding mechanism 8 moves, the round rod 815 at the bottom of the active rod 808 continuously contacts the convex block 11, causing the active rod 808 to continuously jump up and down, so that the push block 822 continuously squeezes the piston rod of the air pump 823 to pressurize the inside of the box body 802, causing the piston plate 826 to move downward and squeeze out the cleaning agent. The cleaning agent will enter the first liquid outlet pipe 803 and the second liquid outlet pipe 804. Since pressure valves are provided at both ends of the second liquid outlet pipe 804, as the pressure increases, the cleaning agent will enter the liquid outlet hole plate 805, and then keep the wiping cloth 806 always in a wet state, improving the cleaning effect on the oil stains; The grinding component 811 moves synchronously. Start the grinding motor 820, and the grinding motor 820 drives the second bevel gear 821 to rotate. The second bevel gear 821 meshes with the first bevel gear 819, thereby driving the two rotating shafts 817 and the grinding discs 818 to rotate to complete the grinding of the welding surface. And when grinding, an external air source (not shown) supplies air to the U-shaped pipe 812. Finally, use the air blown out by the air outlet nozzle 814 to blow away the waste chips generated by grinding. Since the active rod 808 will also drive the grinding component 811 to jump up and down when jumping up and down, the grinding disc 818 will be briefly separated from the surface of the trough side. This is to completely blow away the waste chips to avoid the chips generated by grinding being re-involved in the grinding area and being pressed into the material, causing scratches. Due to the existence of the third spring 602, the bimetallic wing plate will also be pushed to generate vibrations, accelerating the falling of the waste chips; After the material is cleaned and ground, the cleaning and grinding mechanism 8 disengages between the bimetallic wing plate and the trough side. Use the second moving mechanism 10 to move the welding torch of the carbon dioxide shielded welding machine 9 to one end of the material, and drive the bimetallic wing plate to descend through the electric telescopic rod 5 to make it contact the trough side. Finally, the second moving mechanism 10 drives the welding torch to move, and start the carbon dioxide shielded welding machine 9 to complete the welding, ensuring the welding effect.

[0029] The above has described an embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as used to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A welding device for a bimetallic wing plate of a scraper middle trough, comprising a base (1), a first gantry (2) and a second gantry (3) being fixed to the base (1), characterized in that: A cross arm (4) is fixed between the first gantry (2) and the second gantry (3), electric telescopic rods (5) are symmetrically mounted on the lower surface of the cross arm (4), and an upper clamping mechanism (6) is commonly fixed to the output shafts of the two electric telescopic rods (5) for clamping the bimetallic wing plate; A first moving mechanism (7) and a second moving mechanism (10) are arranged between the first gantry (2) and the second gantry (3); a cleaning and grinding mechanism (8) is fixed on the first moving mechanism (7); a carbon dioxide shielded welding machine (9) is installed on the base (1); and a welding gun of the carbon dioxide shielded welding machine (9) is fixed on the second moving mechanism (10); The cleaning and polishing mechanism (8) comprises two wiping cloths (806), a polishing assembly (811) and a box (802); the wiping cloths (806) are used to remove oil stains at the welding joints; the polishing assembly (811) is used to remove oxide scales at the welding joints; a cleaning agent is provided in the box (802); when the first moving mechanism (7) drives the cleaning and polishing mechanism (8) to move, the box (802) provides the cleaning agent for the wiping cloths (806).

2. A welding device for a bimetallic wing plate of a scraper middle groove according to claim 1, characterized in that: The cleaning and polishing mechanism (8) further comprises a mounting plate (801), the box body (802) being fixed on one side of the mounting plate (801), the bottom of the box body (802) being connected to a first liquid outlet pipe (803), one end of the first liquid outlet pipe (803) being connected to a second liquid outlet pipe (804), both ends of the second liquid outlet pipe (804) being fixed with liquid outlet orifice plates (805), the two wiping cloths (806) being respectively fixed on side walls of the two liquid outlet orifice plates (805) which are away from each other, and pressure valves being installed at both ends of the second liquid outlet pipe (804).

3. A welding device for a bimetallic wing plate of a scraper middle groove according to claim 2, characterized in that: A fixing ring (807) is fixed to the top and the bottom of one side wall of the mounting plate (801); an active rod (808) is movably sleeved between the two fixing rings (807); a driven rod (809) is fixed to the active rod (808); a driven plate (810) is fixed to one end of the driven rod (809); and the grinding assembly (811) is fixed to the side wall of the driven plate (810).

4. A welding device for a bimetallic wing plate of a scraper middle groove according to claim 3, characterized in that: The grinding assembly (811) comprises a driving box (816), wherein the driving box (816) is fixed to the side wall of the driven plate (810) via a connecting rod; a rotating shaft (817) is rotatably mounted on the top and bottom of the driving box (816); a grinding disc (818) is mounted on the ends of the two rotating shafts (817) that are away from each other; a first bevel gear (819) is mounted on the ends of the two rotating shafts (817) that are close to each other; a grinding motor (820) is mounted on one side of the driving box (816); an output shaft of the grinding motor (820) is connected to a second bevel gear (821); and the second bevel gear (821) is meshed with the first bevel gear (819).

5. A welding device for a bimetallic wing plate of a scraper middle groove according to claim 4, characterized in that: A U-shaped tube (812) is also fixed on the driven plate (810), branch tubes (813) are fixed at both ends of the U-shaped tube (812), air outlet nozzles (814) are evenly arranged on one side of the branch tube (813) along the length direction, and the U-shaped tube (812) is connected to an external air source via a hose.

6. A welding device for a bimetallic wing plate of a scraper middle slot according to claim 5, characterized in that: The upper clamping mechanism (6) comprises two support plates (603), the two support plates (603) are respectively connected to the output shafts of the two electric telescopic rods (5), the bottom of the support plate (603) is connected to a third spring (602), the bottoms of a plurality of the third springs (602) are commonly connected to a positioning plate (601), a plurality of clamping components are fixed to the side of the positioning plate (601) close to the base (1), the clamping components comprise a fixing block (604), a screw rod (605) is threadedly connected to the fixing block (604), a clamping block (606) is rotatably mounted on one end of the screw rod (605), and a knob (607) is mounted on the other end.

7. A welding device for a bimetallic wing plate of a scraper middle groove according to claim 6, characterized in that: A round-headed rod (815) is fixed at the bottom of the active rod (808); a plurality of protrusions (11) are evenly mounted on the upper surface of the base (1) along the length direction, and the protrusions (11) are located directly below the round-headed rod (815); an air pump (823) is mounted on the side wall of the mounting plate (801); an air outlet pipe of the air pump (823) is connected to the box body (802); a first spring (823) is sleeved on the piston rod of the air pump (823); 4), a second spring (825) is connected to the inner surface of the top wall of the box body (802), a piston plate (826) is connected to the bottom of the second spring (825), the piston plate (826) is located above the detergent, a push block (822) is fixed to one side of the active rod (808), a pressure relief pipe is connected to the top of the box body (802), a liquid adding pipe is connected to one side of the box body (802), and sealing blocks are installed on the pressure relief pipe and the liquid adding pipe.

8. A welding device for a bimetallic wing plate of a scraper middle slot according to claim 7, characterized in that: The first moving mechanism (7) and the second moving mechanism (10) are both composed of a lead screw (701), a moving block (702), a guide rod (703) and a drive motor; the two ends of the lead screw (701) are rotatably connected to the first gantry (2) and the second gantry (3), respectively; the moving block (702) is threadedly connected to the lead screw (701); the guide rod (703) is movably connected to the moving block (702), and the two ends of the guide rod (703) are respectively fixed to the first gantry (2) and the second gantry (3); the drive motor is mounted on the first gantry (2), and the output shaft of the drive motor is connected to the lead screw (701); one of the moving blocks (702) is fixedly connected to a welding gun of a carbon dioxide shielded welding machine (9), and the other moving block (702) is fixedly connected to a mounting plate (801).

9. A bimetallic wing plate, characterized in that: The welding device for the bimetallic wing plate of the middle groove of a scraper conveyor as claimed in claim 1 is used for welding. The bimetallic wing plate is welded to the groove side by a carbon dioxide shielded welding machine (9). The bimetallic wing plate is produced by a composite of two metal materials. The material of the welding part is 35SiMn alloy steel, and the material of the wear-resistant part is Cr26 high chromium alloy.

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