Casting device for high-strength wear-resistant rotary kiln gear ring

Abstract

The invention belongs to the technical field of gear ring welding and casting, and particularly relates to a high-strength wear-resistant rotary kiln gear ring casting device which comprises a rack, a welding air cylinder, a welding gun and a welding rod conveyor, the welding air cylinder is arranged at the top of the rack, and a mounting base is fixedly arranged at the movable end of the welding air cylinder; the welding gun is fixedly arranged at the bottom of the mounting base, the welding rod conveyor is fixedly arranged on the side wall of the mounting base, and the clamping and rotating mechanism is fixedly arranged at the bottom of the rack and used for clamping the sectional type gear ring and conducting position rotating welding. Through cooperation of the knocking mechanism, the welding temperature detection mechanism and the smoke removal mechanism, the problems that in the prior art, the welding temperature is difficult to accurately control, the welding quality is unstable, smoke treatment is poor, and the residual stress of the gear ring is high are effectively solved, and the welding quality and the production efficiency of the high-strength wear-resistant rotary kiln gear ring are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ring gear welding and casting, and particularly relates to a casting device for a high-strength and wear-resistant rotary kiln ring gear. Background Art

[0002] With the continuous expansion of industrial production scale and the increasing improvement of production efficiency requirements, higher standards are put forward for the strength and wear resistance of rotary kiln ring gears. High-strength and wear-resistant rotary kiln ring gears play a crucial role in practical applications. It not only has to withstand huge torques and impact forces, but also is in a harsh working environment for a long time, facing multiple tests such as material wear and high-temperature erosion.

[0003] Currently, to solve the problems of large ring gear casting, transportation and installation, high-strength and wear-resistant rotary kiln ring gears are generally cast in two or four parts, and then welded together as a whole for erection and use. For example, the publication number: CN218135976U discloses a casting device for a semi-ring gear of a cement rotary kiln. However, it is difficult to accurately control the welding temperature of the welding torch by existing technical means, resulting in uncontrollable fluctuations in the temperature of the welding part. When the welding temperature is too high, the metal in the welding part and the surrounding area rapidly heats up, forming a heat-affected zone. In this area, the microscopic structure of the metal changes violently, the grains grow rapidly, and the originally uniform and dense crystal structure is damaged. On the contrary, if the welding temperature is too low, the fluidity of the weld metal is greatly reduced, it is difficult to fully fill the welding gap, and various welding defects such as incomplete penetration, slag inclusion, and porosity are likely to occur. Whether it is the heat-affected zone and welding defect problems caused by too high or too low temperature, a large amount of manpower, material resources and time are required for quality inspection and repair work after the ring gear is manufactured.

[0004] Therefore, a casting device for a high-strength and wear-resistant rotary kiln ring gear is proposed. Summary of the Invention

[0005] The purpose of the invention is to solve the above problems and provide a casting device for a high-strength and wear-resistant rotary kiln ring gear.

[0006] To achieve the above purpose, the invention adopts the following technical scheme: A casting device for a high-strength and wear-resistant rotary kiln ring gear includes a frame, a welding cylinder, a welding torch and a welding rod conveyor. The welding cylinder is arranged on the top of the frame. An installation seat is fixedly provided at the moving end of the welding cylinder. The welding torch is fixedly arranged at the bottom of the installation seat. The welding rod conveyor is fixedly arranged on the side wall of the installation seat. It further includes: A clamping and rotating mechanism, fixedly arranged at the bottom of the frame, for clamping the segmented ring gear and performing position rotation welding; The moving mechanism is arranged at the top of the frame. The welding cylinder is fixedly arranged at the bottom of the moving mechanism and is used to drive the welding torch to move at the welding position of the gear ring. The knocking mechanism is fixedly arranged at one side of the bottom of the mounting seat and is used to knock and vibrate one side of the welded part of the gear ring. The welding temperature detection mechanism is fixedly arranged at the lower end of the knocking mechanism and is used to measure the temperature of one side of the welded part of the gear ring. The smoke removal mechanism is fixedly arranged on the knocking mechanism, and the lower end of the smoke removal mechanism extends to one side of the welding nozzle head of the welding torch. The PLC controller is fixedly arranged on the inner side wall of the frame. The welding cylinder, the welding torch, the electrode conveyor, the clamping and rotating mechanism, the moving mechanism, the knocking mechanism, the welding temperature detection mechanism and the smoke removal mechanism are all electrically connected to the PLC controller.

[0007] Preferably, the clamping and rotating mechanism includes a housing fixedly arranged at the bottom of the frame. A rotating motor is fixedly arranged inside the housing. A rotating shaft is rotatably arranged at the top of the housing. The lower end of the rotating shaft is fixedly connected to the output shaft of the rotating motor, and a clamping table is fixedly arranged at the upper end of the rotating shaft. A double-rod cylinder is fixedly arranged at the center of the clamping table. Arc-shaped clamping plates are fixedly arranged at both moving ends of the double-rod cylinder.

[0008] Preferably, an infrared generator is fixedly arranged on the shaft wall of the rotating shaft. Four infrared receivers are fixedly arranged on the inner side wall of the housing, and the height of the infrared receivers is the same as that of the infrared generator.

[0009] Preferably, the moving mechanism includes a moving motor fixedly arranged at one side of the top of the frame. A chute is opened at the top of the frame. A slider is arranged inside the chute. The output end of the moving motor is fixedly provided with a screw rod extending into the chute, and the screw rod is threadedly connected to the middle part of the slider. The welding cylinder is fixedly arranged at the bottom of the slider.

[0010] Preferably, the knocking mechanism includes a fixed cylinder fixedly arranged at the bottom of the mounting seat. A knocking cylinder is arranged on the inner wall of the top of the fixed cylinder. A connecting seat is fixedly arranged at the moving end of the knocking cylinder. A hard knocking pipe extending downward is fixedly arranged at the bottom of the connecting seat, and the lower end of the hard knocking pipe extends to one side of the welding nozzle head of the welding torch.

[0011] Preferably, the welding temperature detection mechanism includes a fixed sleeve fixedly arranged at the lower end of the hard percussion tube. A permanent magnet block is slidably arranged inside the fixed sleeve. An insulating protective sleeve is fixedly arranged at the bottom of the permanent magnet block. A wear-resistant thermistor is fixedly arranged inside the insulating protective sleeve. An electromagnet is fixedly arranged on the inner wall of the top of the fixed sleeve. An elastic telescopic rod is fixedly arranged between the electromagnet and the insulating protective sleeve.

[0012] Preferably, the smoke removal mechanism includes an air suction sleeve fixedly arranged on the side wall of the fixed cylinder. An air suction fan is fixedly arranged inside the air suction sleeve. A high-temperature resistant activated carbon filter screen is fixedly arranged inside the air suction sleeve and on one side of the air suction fan. One side of the air suction sleeve located inside the fixed cylinder is fixedly provided with a telescopic air duct, and one end of the telescopic air duct is fixedly connected to the pipe wall of the hard percussion tube. A smoke suction pipe is fixedly arranged at the lower end of the pipe wall of the hard percussion tube.

[0013] Preferably, a weld alignment line is arranged on the top of the clamping table, and the inner diameter of the clamping table matches the outer diameter of the gear ring. The radian of the two arc-shaped clamping plates matches the inner diameter of the gear ring.

[0014] Compared with the existing technology, the beneficial effects of the present invention are as follows: Through the provided welding temperature detection mechanism, the wear-resistant thermistor is used to monitor the temperature of the welding part in real time, and the temperature signal is fed back to the PLC controller. The PLC controller automatically adjusts the current and voltage of the welding torch according to the set temperature range. When the temperature is too high, the current and voltage are reduced to avoid problems such as too large heat-affected area and overheating of the structure. When the temperature is too low, the current and voltage are increased to prevent welding defects such as incomplete penetration, slag inclusion, and porosity, effectively improving the welding quality and reducing the labor, material, and time costs of subsequent quality inspection and repair.

[0015] Through the provided smoke removal mechanism, it is automatically started during the welding process. The air suction fan sucks the smoke generated by welding into the hard percussion tube through the smoke suction pipe, and then filters it through the high-temperature resistant activated carbon filter screen. The strong adsorption capacity of the activated carbon can remove gaseous pollutants and some solid particles in the smoke, purifying the welding environment. Moreover, through the linkage of the wear-resistant thermistor and the PLC controller, the power of the air suction fan is adjusted in real time according to the change of the welding temperature, which can not only effectively remove the smoke, but also reduce the energy consumption.

[0016] 3. Through the provided percussion mechanism, after the welding is completed, the percussion mechanism is used to percuss the welding part. The percussion cylinder drives the hard percussion tube to repeatedly percuss one side of the welding part, causing the welding part to resonate, thereby releasing the residual stress. Reducing the residual stress can improve the dimensional stability of the gear ring, reduce the dimensional change during subsequent use, and at the same time enhance the anti-fatigue performance of the gear ring and extend the service life of the gear ring. Description of the Drawings

[0017] Figure 1 It is a stereoscopic diagram of a casting device for a high-strength wear-resistant rotary kiln gear ring provided by the present invention; Figure 2 It is a three-dimensional diagram of a clamping and rotating mechanism of a casting device for a high-strength and wear-resistant rotary kiln gear ring provided by the present invention; Figure 3 It is a three-dimensional diagram of a moving mechanism of a casting device frame of a high-strength wear-resistant rotary kiln gear ring provided by the present invention after being cut open; Figure 4 It is a stereoscopic diagram of a striking mechanism, a welding temperature detection mechanism and a smoke removal mechanism of a casting device of a high-strength wear-resistant rotary kiln gear ring provided by the present invention; Figure 5 It is a cutaway perspective view of a striking mechanism and a smoke removal mechanism of a casting device for a high-strength wear-resistant rotary kiln gear ring provided by the present invention; Figure 6 It is a cutaway perspective view of a welding temperature detection mechanism of a casting device for a high-strength wear-resistant rotary kiln gear ring provided by the present invention; Figure 7 It is a stereoscopic diagram of a clamping rotating mechanism of a casting device for a high-strength and wear-resistant rotary kiln gear ring provided by the present invention completing the clamping of a segmented gear ring.

[0018] In the figure: 1 frame, 2 welding cylinder, 3 welding gun, 4 electrode conveyor, 5 mounting seat, 6 clamping rotation mechanism, 61 shell, 62 rotating motor, 63 rotating shaft, 64 clamping table, 65 double-rod cylinder, 66 arc clamp, 67 infrared generator, 68 infrared receiver, 7 moving mechanism, 71 moving motor, 72 slide, 73 slider, 74 screw, 8 knocking mechanism, 81 fixed cylinder, 82 knocking cylinder, 83 connecting seat, 84 hard knocking tube, 9 welding temperature detection mechanism, 91 fixed sleeve, 92 permanent magnet block, 93 insulating protective sleeve, 94 wear-resistant thermistor, 95 electromagnetic block, 96 elastic telescopic rod, 10 smoke removal mechanism, 101 suction sleeve, 102 suction fan, 103 high temperature resistant activated carbon filter, 104 telescopic air guide pipe, 105 smoking pipe, 11 PLC controller. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] like Figures 1 - 7As shown in the figure, a casting device for a high-strength wear-resistant girth gear of a rotary kiln includes a frame 1, a welding cylinder 2, a welding torch 3 and a welding rod conveyor 4. The welding cylinder 2 is arranged at the top of the frame 1. An installation seat 5 is fixedly provided at the moving end of the welding cylinder 2. The welding torch 3 is fixedly arranged at the bottom of the installation seat 5. The welding rod conveyor 4 is fixedly arranged on the side wall of the installation seat 5. It also includes: A clamping and rotating mechanism 6, fixedly arranged at the bottom of the frame 1, used to clamp the segmented girth gear and perform position rotation welding. The clamping and rotating mechanism 6 includes a housing 61 fixedly arranged at the bottom of the frame 1. A rotating motor 62 is fixedly arranged inside the housing 61 (a housing cover is provided on the side wall of the housing 61, which can be opened for maintaining the rotating motor 62, not shown in the figure). A rotating shaft 63 is rotatably arranged at the top of the housing 61. The lower end of the rotating shaft 63 is fixedly connected to the output shaft of the rotating motor 62. And a clamping table 64 is fixedly arranged at the upper end of the rotating shaft 63. A double-rod cylinder 65 is fixedly arranged at the center inside the clamping table 64. Arc-shaped clamping plates 66 are fixedly arranged at both moving ends of the double-rod cylinder 65. A weld alignment line is arranged on the top of the clamping table 64. And the inner diameter of the clamping table 64 matches the outer diameter of the girth gear. The radian of the two arc-shaped clamping plates 66 matches the inner diameter of the girth gear. The number of weld alignment lines is four. The four weld alignment lines are wound around the top of the clamping table 64. Place the two-segment or four-segment girth gear inside the clamping table 64. At the same time, align the welding parts of the two-segment or four-segment girth gear with the positions of the two or four weld alignment lines. Then, control the double-rod cylinder 65 to extend, so that the double-rod cylinder 65 drives the arc-shaped clamping plates 66 to move and clamp and fix the two-segment or four-segment girth gear. During the welding process, if it is necessary to change the welding position, the rotating motor 62 can be controlled to work, so that the rotating motor 62 drives the clamping table 64 and the segmented girth gear inside to rotate; An infrared generator 67 is fixedly arranged on the shaft wall of the rotating shaft 63. Four infrared receivers 68 are fixedly arranged on the inner side wall of the housing 61. And the height of the infrared receiver 68 is the same as the height of the infrared generator 67. When the rotating shaft 63 rotates, it will drive the infrared generator 67 emitter to rotate together. At the same time, the infrared receiver 68 will emit an infrared light beam. When the infrared generator 67 is aligned with one of the infrared receivers 68, the infrared receiver 68 can receive the emitted infrared light beam. The infrared receiver 68 then feeds back this signal and stops the rotating motor 62 from continuing to work.

[0021] The moving mechanism 7 is arranged on the top of the frame 1, and the welding cylinder 2 is fixedly arranged at the bottom of the moving mechanism 7, which is used to drive the welding gun 3 to move at the welding position of the gear ring. The moving mechanism 7 includes a moving motor 71 fixedly arranged on one side of the top of the frame 1, and a slide groove 72 is opened on the top of the frame 1. A slider 73 is arranged inside the slide groove 72. The output end of the moving motor 71 is fixedly provided with a screw rod 74 extending to the inside of the slide groove 72, and the rod wall of the screw rod 74 is threadedly connected with the middle part of the slider 73. The welding cylinder 2 is fixedly arranged at the bottom of the slider 73. When the moving motor 71 is started, the moving motor 71 can drive the screw rod 74 to rotate, and the screw rod 74 can drive the slider 73 to move inside the slide groove 72, thereby driving the welding gun 3 to move horizontally and complete the uniform welding of the segmented gear ring welding part.

[0022] The knocking mechanism 8 is fixedly arranged at one side of the bottom of the mounting seat 5, and is used to knock and vibrate one side of the welding part of the gear ring, and the knocking mechanism 8 is staggered with the welding gun 3, so that the position of the knocking mechanism 8, the position of the welding gun 3 and the position of the welding part are not on a straight line, but the position of the welding gun 3 and the position of the welding part are on a straight line, so as to avoid the phenomenon that the knocking mechanism 8 contacts the welded part and hinders the movement. The knocking mechanism 8 includes a fixed cylinder 81 fixedly arranged at the bottom of the mounting seat 5, and the top of the fixed cylinder 81 is internally A knocking cylinder 82 is provided on the wall, and a connecting seat 83 is fixedly provided at the movable end of the knocking cylinder 82, and a hard knocking tube 84 extending downward is fixedly provided at the bottom of the connecting seat 83, and the lower end of the hard knocking tube 84 extends to one side of the welding nozzle head of the welding gun 3. The knocking cylinder 82 is controlled to extend and drive the hard knocking tube 84 to move downward, so that the bottom of the fixed sleeve 91 knocks on one side of the welding part of the segmented gear ring, and the knocking cylinder 82 is repeatedly controlled to extend and retract and repeatedly knock on the welding part, so that resonance is generated on one side of the welding part.

[0023] The welding temperature detection mechanism 9 is fixedly arranged at the lower end of the knocking mechanism 8 and is used for measuring the temperature on one side of the welding part of the gear ring. The welding temperature detection mechanism 9 includes a fixed sleeve 91 fixedly arranged at the lower end of the hard knocking pipe 84. A permanent magnet block 92 is slidably arranged inside the fixed sleeve 91. An insulating protective sleeve 93 is fixedly arranged at the bottom of the permanent magnet block 92. A wear-resistant thermistor 94 is fixedly arranged inside the insulating protective sleeve 93. An electromagnet 95 is fixedly arranged on the inner wall of the top of the fixed sleeve 91. An elastic telescopic rod 96 is fixedly arranged between the electromagnet 95 and the insulating protective sleeve 93. During the welding process, the bottom of the wear-resistant thermistor 94 will contact one side of the welding part, and the temperature of the welding part can be detected in real time. At the same time, when the welding torch 3 moves, the wear-resistant thermistor 94 will also move accordingly. Due to the characteristics of the material of the wear-resistant thermistor 94, there will be no wear phenomenon, ensuring the temperature detection effect of the welding part. When the temperature detection is not required, the power supply of the electromagnet 95 is turned on. After the electromagnet 95 is powered on, it will generate a magnetic attraction force on the permanent magnet block 92, causing the permanent magnet block 92 and the wear-resistant thermistor 94 to overcome the elastic force of the elastic telescopic rod 96 and move upward and retract into the fixed sleeve 91.

[0024] The smoke exhaust mechanism 10 is fixedly arranged on the knocking mechanism 8, and the lower end of the smoke exhaust mechanism 10 extends to one side of the nozzle head of the welding torch 3. The smoke exhaust mechanism 10 includes an air suction sleeve 101 fixedly arranged on the side wall of the fixed cylinder 81. An air suction fan 102 is fixedly arranged inside the air suction sleeve 101. A high-temperature resistant activated carbon filter screen 103 is fixedly arranged inside the air suction sleeve 101 and on one side of the air suction fan 102. A telescopic air duct 104 is fixedly arranged on one side of the air suction sleeve 101 inside the fixed cylinder 81, and one end of the telescopic air duct 104 is fixedly connected to the pipe wall of the hard knocking pipe 84. The telescopic structure of the telescopic air duct 104 enables the up and down movement of the hard knocking pipe 84 not to be restricted. A smoke suction pipe 105 is fixedly arranged at the lower end of the pipe wall of the hard knocking pipe 84. When the air suction fan 102 works, it can suck the smoke into the inside of the hard knocking pipe 84 through the smoke suction pipe 105, and then make the smoke pass through the high-temperature resistant activated carbon filter screen 103 for filtration, so as to achieve the removal of the smoke components. The filtered gas is then discharged outward. The high-temperature resistant activated carbon filter screen 103 is a detachable structure (not shown in the figure), and the high-temperature resistant activated carbon filter screen 103 can be disassembled and cleaned.

[0025] The PLC controller 11 is fixedly arranged on the inner side wall of the frame 1. The welding cylinder 2, the welding torch 3, the electrode conveyor 4, the clamping and rotating mechanism 6, the moving mechanism 7, the knocking mechanism 8, the welding temperature detection mechanism 9 and the smoke exhaust mechanism 10 are all electrically connected to the PLC controller 11.

[0026] The operating principle of the present invention is described as follows: After the segmented high-strength wear-resistant rotary kiln gear ring is transported to the destination by the staff, it is inspected to check whether there are defects such as cracks and inclusions inside the material to ensure that the material quality meets the welding requirements. Then, the segmented high-strength wear-resistant rotary kiln gear ring is placed inside the clamping table 64 and spliced and assembled. During the splicing process, it is necessary to align the welding parts of the segmented gear ring with the weld alignment lines on the top of the clamping table 64 (the number of weld alignment lines set on the clamping table 64 is four, and it is necessary to keep the position aligned with the weld alignment lines during the process of splicing and clamping the segmented gear ring). If the gear ring is of the two-end type, it is necessary to align the two welding parts with the two weld alignment lines on the top of the clamping table 64. If the gear ring is of the four-segment type, it is necessary to align the four welding parts with the four weld alignment lines on the top of the clamping table 64. The staff manually operates the PLC controller 11 to make the PLC controller 11 start the double-rod cylinder 65 to work. When the two moving ends of the double-rod cylinder 65 extend, they drive the two arc-shaped clamping plates 66 to move simultaneously and clamp the spliced gear ring, thus completing the fixed installation of the segmented gear ring (such as Figure 7 , even when clamping the four-segment gear ring, the sizes of the two arc-shaped clamping plates 66 are long enough to achieve clamping and fixing). Since there are many types of segmented gear rings, the sizes of the segmented gear rings are different. In order to improve the applicability of the clamping, the arc-shaped clamping plate 66 and the double-rod cylinder 65 can be set to be detachable and can be replaced according to different sizes of segmented gear rings. For example, the method of bolt disassembly and assembly is used. However, the specific disassembly and replacement structure is not disclosed here; Before welding, the staff will, according to the size, shape of the segmented gear ring and the form of the welding joint, input relevant parameters, such as the diameter of the gear ring, the number of segments, the weld length, the groove angle, etc. Then, the staff manually operates the PLC controller 11 to start the welding cylinder 2 to work. When the welding cylinder 2 extends, it drives the welding torch 3, the electrode feeder 4, the knocking mechanism 8, the welding temperature detection mechanism 9 and the fume removal mechanism 10 at the bottom of the mounting seat 5 to move downward and approach the welding part of the segmented gear ring. Then, the PLC controller 11 outputs a stable current and voltage to the welding torch 3 according to the set parameters and generates an arc. At the same time when the welding current and voltage are connected, the PLC controller 11 sends a signal to the electrode feeder 4 to start the feeding motor inside the electrode feeder 4, driving the electrode to be fed forward at a set speed and cooperate with the arc generated by the welding torch 3 to perform the welding operation. At the same time, the PLC controller 11 also starts the moving motor 71 to work. The moving motor 71 can drive the screw rod 74 to rotate, and the screw rod 74 can drive the slider 73 to move inside the chute 72, so as to drive the lateral position of the welding torch 3 to move and complete the uniform welding of the welding part of the segmented gear ring. At this time, the welding of one welding part of the segmented gear ring is completed. After this section of welding, the staff manually operates the PLC controller 11 to control the retraction of the welding cylinder 2 and starts the rotating motor 62 to work. The rotating motor 62 can drive the rotating shaft 63 to rotate, so that the clamping table 64 at the upper end of the rotating shaft 63 and the segmented gear ring inside the clamping table 64 rotate together, making the un-welded part of the segmented gear ring move below the welding torch 3, and the welding operation can continue to be completed; When adjusting the position of the welding part of the segmented gear ring, the rotating shaft 63 will drive the infrared generator 67 emitter to rotate together. At the same time, the infrared receiver 68 will emit an infrared light beam. When the positions of the infrared generator 67 and one of the infrared receivers 68 are aligned, the infrared receiver 68 can receive the emitted infrared light beam. The photoelectric conversion element inside the infrared receiver 68 will convert the received infrared light signal into an electrical signal. After this signal is amplified and filtered, it is sent to the PLC controller 11. At this time, the PLC controller 11 immediately cuts off the power supply of the rotating motor 62 and stops the rotation of the position of the segmented gear ring. Since the positions of the four infrared receivers 68 are set in one-to-one correspondence with the positions of the welding parts of the segmented gear ring, the welding parts of the segmented gear ring can be aligned with the welding torch 3, improving the welding accuracy; During the welding process, the bottom of the wear-resistant thermistor 94 will contact one side of the welding area. (Since the wear-resistant thermistor 94 is connected to the elastic telescopic rod 96, under normal circumstances, the bottom of the wear-resistant thermistor 94 can be pushed out to the outside of the fixed sleeve 91, ensuring that the bottom of the wear-resistant thermistor 94 contacts one side of the welding area. Moreover, the elastic setting enables the wear-resistant thermistor 94 to be in relatively tight contact with one side of the welding area.) The heat generated at the welding area will be transferred to the surrounding by heat conduction. Since the wear-resistant thermistor 94 is adjacent to the welding area and has good heat conduction performance, the heat of the welding area will be conducted to the wear-resistant thermistor 94. The resistance value of the wear-resistant thermistor 94 will change accordingly with the change of temperature. Its resistance-temperature characteristic has high sensitivity and stability, and can accurately reflect the minute change of temperature. For example, for the wear-resistant thermistor 94 with negative temperature coefficient (NTC), its resistance value will decrease significantly when the temperature rises. By measuring the change of the resistance value of the wear-resistant thermistor 94 through the measuring circuit, and then amplifying and filtering the measured electrical signal and sending it to the PLC controller 11, the PLC controller 11 adjusts the current and voltage of the welding torch 3 according to the temperature change of the welding area. For example, the welding temperature range is 1100°C - 1300°C. When the detected temperature exceeds 1300°C, the PLC controller 11 automatically reduces the current and voltage of the welding torch 3 to avoid problems such as excessive heat-affected zone and overheating of the structure during the welding process. When the detected temperature is lower than 1100°C, the PLC controller 11 automatically increases the current and voltage of the welding torch 3 to avoid various welding defects such as incomplete penetration, slag inclusion, and porosity, and ensure the welding effect; During the process of starting the welding gun 3 for welding, the PLC controller 11 will automatically start the suction fan 102. Due to the high temperature of the electric arc, the metal material quickly melts and evaporates, forming metal particle smoke. At the same time, the additives and coating in the welding rod decompose and burn at high temperature, releasing various gases and smoke. These smokes will pollute the environment. The suction fan 102 can inhale the smoke through the suction pipe 105 into the interior of the hard percussion pipe 84 (the suction pipe 105 is arranged on one side of the welding gun 3. The suction pipe 105 can comprehensively inhale the generated smoke through its strong suction ability, similar to the range hood in the prior art), and then make the smoke pass through the high-temperature resistant activated carbon filter screen 103 (introduce a high-temperature resistant inorganic coating, such as a silicon aluminate coating, on the surface of ordinary activated carbon to enhance its high-temperature resistance and reduce the influence of high-temperature smoke on the adsorption capacity of the high-temperature resistant activated carbon filter screen 103). Activated carbon has a highly developed pore structure and a large specific surface area, which gives it a strong adsorption capacity. Various gaseous pollutants and some solid particles in the smoke will be adsorbed on the pore surface of the activated carbon, thus realizing the removal of the smoke components. The filtered gas is then discharged outward. At the same time, during the welding process, as the welding temperature rises or falls, the amount of generated smoke also rises or falls. The wear-resistant thermistor 94 can detect the temperature change during welding in real time and feedback it to the PLC controller 11. The PLC controller 11 increases or decreases the power of the suction fan 102 correspondingly according to the rise or fall of the temperature, which can not only effectively complete the removal of the smoke, but also reduce the energy consumption; After the welding part of the segmented gear ring is welded, the operator operates the PLC controller 11 to control the welding cylinder 2 to retract a certain distance, so that the welding gun 3 and the welding rod conveyor 4 are separated from the welding part. Then, manually operate the PLC controller 11 to make the PLC controller 11 connect the power supply of the electromagnetic block 95 and the power supply of the percussion cylinder 82 through the control circuit. After the electromagnetic block 95 is powered on, it will generate a magnetic suction force on the permanent magnet block 92 by itself, so that the permanent magnet block 92 and the wear-resistant thermistor 94 together overcome the elastic force of the elastic telescopic rod 96 and move upward. After the wear-resistant thermistor 94 retracts into the interior of the fixed sleeve 91 (to avoid damage to the wear-resistant thermistor 94 caused by subsequent percussion), the percussion cylinder 82 extends and drives the hard percussion pipe 84 to move downward, so that the bottom of the fixed sleeve 91 strikes on one side of the welding part of the segmented gear ring. Repeatedly control the percussion cylinder 82 to extend and retract and repeatedly strike the welding part, so that resonance occurs on one side of the welding part. During the vibration process, the residual stress is gradually released, reducing the residual stress inside the segmented gear ring. The existence of residual stress will cause the size of the gear ring to change during subsequent use, so as to improve the dimensional stability of the gear ring and enhance the fatigue resistance; After welding one side of the segmented gear ring and reducing the residual stress, the staff disassemble and reinstall the segmented gear ring with the other side facing up and perform welding treatment on the other side. Repeat the above process until both sides of the segmented gear ring are completely welded. The entire welding process has a high degree of automation and high welding efficiency, and can quickly complete the welding of the segmented gear ring. Here, it should be emphasized that since the strength required for the use environment of the segmented gear ring is not high, only the upper and lower surfaces need to be welded. Taking the rotary kiln used in the fine chemical industry as an example, its operating conditions are relatively mild, the material properties are stable, and during the entire production process, the wear of the gear ring by the material is extremely small. Moreover, the temperature inside the rotary kiln is stable between 50-80°C, the temperature fluctuation range is narrow, and there is almost no risk of gear ring deformation caused by thermal expansion and contraction. The rotational speed of the rotary kiln is low and constant, generally maintained at 5-10 revolutions per minute, and the torque and impact force borne by the gear ring are small. From the perspective of the gear ring structure design, relying only on the upper and lower surface welding, the stress distribution of the gear ring is uniform under this working condition, and the stress at the key parts is far lower than the allowable stress of the material, which can meet the strength and stability requirements. Of course, when welding a segmented gear ring with high use strength and welding the welding parts on both the inner and outer sides of the segmented gear ring, however, this device cannot weld the inner and outer side parts. Since the upper and lower surfaces of the segmented gear ring have been welded, the entire gear ring already has a certain structural strength. Therefore, the staff only need to remove the gear ring and directly hold the welding machine for welding. There is no need for clamping and fixing during the process of holding the welding machine, and there is no need to consider the welding accuracy.

[0027] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A casting device for a high-strength wear-resistant girth gear of a rotary kiln, comprising a frame (1), a welding cylinder (2), a welding torch (3) and an electrode conveyor (4). The welding cylinder (2) is arranged at the top of the frame (1). An installation seat (5) is fixedly arranged at the movable end of the welding cylinder (2). The welding torch (3) is fixedly arranged at the bottom of the installation seat (5). The electrode conveyor (4) is fixedly arranged on the side wall of the installation seat (5), characterized in that, It further includes: A clamping and rotating mechanism (6), fixedly arranged at the bottom of the frame (1), for clamping the segmented gear ring and performing position rotation welding; A moving mechanism (7), arranged at the top of the frame (1), and the welding cylinder (2) is fixedly arranged at the bottom of the moving mechanism (7), for driving the welding torch (3) to move at the welding position of the gear ring; A knocking mechanism (8), fixedly arranged on one side of the bottom of the mounting seat (5), for knocking and vibrating one side of the welded part of the gear ring; A welding temperature detection mechanism (9), fixedly arranged at the lower end of the knocking mechanism (8), for measuring the temperature of one side of the welded part of the gear ring; A fume extraction mechanism (10), fixedly arranged on the knocking mechanism (8), and the lower end of the fume extraction mechanism (10) extends to one side of the nozzle tip of the welding torch (3); A PLC controller (11), fixedly arranged on the inner side wall of the frame (1), and the welding cylinder (2), welding torch (3), electrode conveyor (4), clamping and rotating mechanism (6), moving mechanism (7), knocking mechanism (8), welding temperature detection mechanism (9) and fume extraction mechanism (10) are all electrically connected to the PLC controller (11).

2. The casting device for a high-strength wear-resistant rotary kiln gear ring according to claim 1, wherein, The clamping and rotating mechanism (6) includes a housing (61) fixedly arranged at the bottom of the frame (1), a rotating motor (62) is fixedly arranged inside the housing (61), a rotating shaft (63) is rotatably arranged at the top of the housing (61), the lower end of the rotating shaft (63) is fixedly connected to the output shaft of the rotating motor (62), and a clamping table (64) is fixedly arranged at the upper end of the rotating shaft (63). A double-rod cylinder (65) is fixedly arranged at the center inside the clamping table (64), and arc-shaped clamping plates (66) are fixedly arranged at both moving ends of the double-rod cylinder (65).

3. The casting device for a high-strength wear-resistant rotary kiln gear ring according to claim 2, characterized in that, An infrared generator (67) is fixedly arranged on the shaft wall of the rotating shaft (63), and four infrared receivers (68) are fixedly arranged on the inner side wall of the housing (61), and the height of the infrared receivers (68) is the same as that of the infrared generator (67).

4. A casting device for a high-strength wear-resistant rotary kiln gear ring according to claim 1, characterized in that, The moving mechanism (7) includes a moving motor (71) fixedly arranged on one side of the top of the frame (1), a chute (72) is opened on the top of the frame (1), a slider (73) is arranged inside the chute (72), the output end of the moving motor (71) is fixedly provided with a screw rod (74) extending into the chute (72), and the rod wall of the screw rod (74) is threadedly connected to the middle of the slider (73), and the welding cylinder (2) is fixedly arranged at the bottom of the slider (73).

5. The casting device for a high-strength wear-resistant rotary kiln gear ring according to claim 1, characterized in that, The knocking mechanism (8) includes a fixed cylinder (81) fixedly arranged at the bottom of the mounting seat (5), a knocking cylinder (82) is arranged on the inner wall of the top of the fixed cylinder (81), a connecting seat (83) is fixedly arranged at the moving end of the knocking cylinder (82), a hard knocking pipe (84) extending downward is fixedly arranged at the bottom of the connecting seat (83), and the lower end of the hard knocking pipe (84) extends to one side of the nozzle tip of the welding torch (3).

6. The casting device for a high-strength wear-resistant rotary kiln gear ring according to claim 5, characterized in that, The welding temperature detection mechanism (9) includes a fixed sleeve (91) fixedly arranged at the lower end of the hard percussion pipe (84). A permanent magnet block (92) is slidably arranged inside the fixed sleeve (91). An insulating protective sleeve (93) is fixedly arranged at the bottom of the permanent magnet block (92). A wear-resistant thermistor (94) is fixedly arranged inside the insulating protective sleeve (93). An electromagnet (95) is fixedly arranged on the inner wall of the top of the fixed sleeve (91). An elastic telescopic rod (96) is fixedly arranged between the electromagnet (95) and the insulating protective sleeve (93).

7. The casting device for a high-strength wear-resistant rotary kiln gear ring according to claim 5, characterized in that, The smoke removal mechanism (10) includes an air suction sleeve (101) fixedly arranged on the side wall of the fixed cylinder (81). An air suction fan (102) is fixedly arranged inside the air suction sleeve (101). A high-temperature resistant activated carbon filter screen (103) is fixedly arranged inside the air suction sleeve (101) and on one side of the air suction fan (102). One side of the air suction sleeve (101) located inside the fixed cylinder (81) is fixedly provided with a telescopic air duct (104), and one end of the telescopic air duct (104) is fixedly connected to the pipe wall of the hard percussion pipe (84). A smoke suction pipe (105) is fixedly arranged at the lower end of the pipe wall of the hard percussion pipe (84).

8. The casting device for a high-strength wear-resistant rotary kiln gear ring according to claim 2, characterized in that, A weld alignment line is arranged on the top of the clamping table (64), and the inner diameter of the clamping table (64) matches the outer diameter of the gear ring. The radian of the two arc-shaped clamping plates (66) matches the inner diameter of the gear ring.

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