Online recycling device for submerged-arc welding flux

Abstract

The on-line recycling device comprises a recycling box and a recycling pipe, a suction nozzle is arranged at the end of the recycling pipe, adjusting mechanisms are symmetrically arranged on the two sides of the suction nozzle, each adjusting mechanism comprises a mounting plate and an air cylinder arranged on the mounting plate, a piston rod of each air cylinder penetrates through the mounting plate and then is connected with a supporting plate, and the supporting plates are connected with the recycling box. Rollers are arranged below the supporting plate, a vertical plate is arranged on the upper portion in the recycling box, the recycling box on one side of the vertical plate is communicated with the recycling pipe, the top of the recycling box on the other side of the vertical plate is connected with a negative pressure fan, a plurality of spines are arranged on the vertical plate on the side facing the recycling pipe, and a material gathering cone is arranged in the recycling box below the vertical plate. A magnetic separator is arranged at the lower end opening of the material gathering cone, a primary vibrating screen and a secondary vibrating screen are sequentially and obliquely arranged in the recycling box below the magnetic separator, and a discharging plate is obliquely arranged in the recycling box below the secondary vibrating screen. In conclusion, the welding flux recycling device has the advantages of being thorough in welding flux recycling, convenient to adjust the height of the suction nozzle and good in recycling effect.

Description

Technical Field

[0001] The utility model relates to the technical field of flux recovery, in particular to an on-line recovery and utilization device for submerged arc welding flux. Background Art

[0002] Submerged arc welding is a commonly used welding method in the manufacturing process of pressure vessels. When using this method for welding, the welding arc burns between the welding wire and the workpiece. The arc heat melts the end of the welding wire, the base metal and the flux near the arc. The melted metal forms a molten pool, and the molten flux becomes slag. The molten pool is protected by the slag and the flux vapor and does not come into contact with the air. When the arc moves forward, the arc force pushes the liquid metal in the molten pool to the rear of the molten pool. During the subsequent cooling process, this part of the liquid metal solidifies into a weld seam, and the slag solidifies into a slag shell covering the surface of the weld seam, which has the advantages of stable welding quality, high welding productivity, no arc light and very little smoke and dust.

[0003] During the submerged arc welding process, only a small part of the flux forms slag during welding, and most of it does not melt. This part of the flux needs to be recycled to save production costs. In the current flux recovery and utilization device during use, generally, suction is generated by a turbo fan in the system, and the flux enters the flux storage through a suction nozzle and a flux recovery pipeline. However, there are often the following problems: First, since the sparks generated during submerged arc welding will produce a certain amount of iron filings after cooling, when the iron filings are mixed with the recycled flux and used for welding again, the surface of the weld seam will be rough and uneven. When the amount of iron filings is large, lumps even appear, resulting in poor recycling effect; Second, if the suction nozzle is too high from the workpiece, the suction is not enough to completely recover the flux. On the contrary, if it is too low, the suction nozzle will scrape the slag skin, which not only affects the absorption of the flux but also reduces the quality of the weld seam, and in severe cases, it will even cause the arc to stop. At present, the adjustment method of the suction nozzle height is relatively cumbersome, resulting in time-consuming and laborious problems. Therefore, it is objectively necessary to develop an on-line recovery and utilization device for submerged arc welding flux with thorough flux recovery, convenient adjustment of the suction nozzle height, and good recycling effect. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an on-line recovery and utilization device for submerged arc welding flux with thorough flux recovery, convenient adjustment of the suction nozzle height, and good recycling effect.

[0005] The object of the present utility model is achieved as follows. It includes a recycling bin and a recycling pipe communicating with the upper part of the recycling bin. A suction nozzle is provided at the end of the recycling pipe. Adjusting mechanisms are symmetrically arranged on both sides of the suction nozzle. The adjusting mechanism includes a mounting plate and a cylinder arranged on the mounting plate. The mounting plate is fixed on the suction nozzle. The piston rod of the cylinder passes through the mounting plate and is connected with a supporting plate. A roller is arranged below the supporting plate. A vertical plate is arranged in the upper part of the recycling bin. One side of the recycling bin where the vertical plate is located communicates with the recycling pipe, and a negative pressure fan is connected to the top of the recycling bin on the other side. A number of spikes are arranged on the vertical plate facing the recycling pipe. A filter screen is arranged in the recycling bin below the negative pressure fan. A material collecting cone is arranged in the recycling bin below the vertical plate. A magnetic separator is arranged at the lower port of the material collecting cone. A primary vibrating screen and a secondary vibrating screen are sequentially arranged obliquely in the recycling bin below the magnetic separator. A blanking channel is left between the lower end of the secondary vibrating screen and the side wall of the recycling bin. A discharge plate is arranged obliquely in the recycling bin below the secondary vibrating screen.

[0006] Further, a slide rail is vertically arranged on the side wall of the suction nozzle, and one side of the supporting plate is slidably connected with the slide rail through a slider.

[0007] Further, a distance sensor with the probe facing downwards is arranged on the suction nozzle.

[0008] Further, a heating element is arranged in the recycling bin below the secondary vibrating screen.

[0009] Further, a motor is installed on the vertical plate above the filter screen. The output shaft of the motor passes through the vertical plate and is provided with a crushing rod.

[0010] Further, the primary vibrating screen and the secondary vibrating screen have the same inclination direction. A guiding plate is arranged obliquely between the primary vibrating screen and the secondary vibrating screen. The inclination direction of the guiding plate is opposite to that of the primary vibrating screen, and a guiding channel is left between the lower end of the guiding plate and the side wall of the recycling bin.

[0011] Further, a telescopic pipe is connected between the end of the recycling pipe and the suction nozzle. A ring plate is arranged at the end of the recycling pipe, and a spring is arranged between the ring plate and the suction nozzle.

[0012] The utility model is used for the on-line recycling of submerged arc welding flux. When in use, a negative pressure fan is started. The negative pressure fan generates negative pressure in the recovery box and the recovery pipe, and generates suction at the end of the suction nozzle. The unmelted welding flux is sucked into the suction nozzle under the action of the suction force, enters the recovery box after being transported through the recovery pipe, and flies towards the vertical plate under the action of inertia, collides with the spikes arranged on the vertical plate, and breaks the agglomerated and caked welding flux. Then the welding flux falls under the action of gravity, falls into the magnetic separator, the iron filings mixed in the welding flux are separated, discharged from the discharge port of the magnetic separator and fall onto the first vibrating screen. The materials on the screen are the welding flux components with too large particles, and the remaining welding flux falls onto the second vibrating screen. The materials on the screen are the welding flux with particles meeting the requirements. The materials on the screen fall from the lower end of the second vibrating screen, fall into the bottom of the recovery box for storage through the feeding channel. The materials under the screen of the second vibrating screen are dust, and after falling onto the discharge plate, are discharged from the lower end of the discharge plate. In the utility model, a magnetic separator is arranged in the recovery box to remove the iron filings mixed in the welding flux, improve the purity of the welding flux, ensure the weld quality after the welding flux is reused again, and improve the recycling effect of the welding flux. Secondly, an adjusting mechanism is arranged on the suction nozzle of the utility model. When it is necessary to adjust the distance between the suction nozzle and the workpiece, with the roller always in contact with the surface of the workpiece, the air cylinder is started. The piston rod of the air cylinder extends or contracts. When the piston rod of the air cylinder extends, the suction nozzle moves upward. On the contrary, when the piston rod of the air cylinder contracts, the suction nozzle moves downward, thereby realizing the adjustment of the height of the suction nozzle. The whole adjustment process is relatively convenient and fast, without manual operation, and is time-saving and labor-saving. By adjusting the height of the suction nozzle, it can be ensured that there is always a suitable distance between the suction nozzle and the workpiece, and thus it is ensured that the suction port of the suction nozzle has sufficient suction force to completely recover the welding flux on the workpiece. To sum up, the utility model has the advantages of complete recovery of the welding flux, convenient adjustment of the height of the suction nozzle, and good recycling effect. Description of the Drawings

[0013] Figure 1 is the overall structural schematic diagram of the utility model;

[0014] In the figure: 1 - recovery box, 2 - recovery pipe, 3 - suction nozzle, 4 - mounting plate, 5 - air cylinder, 6 - support plate, 7 - roller, 8 - vertical plate, 9 - negative pressure fan, 10 - spike, 11 - filter screen, 12 - magnetic separator, 13 - first vibrating screen, 14 - second vibrating screen, 15 - discharge plate, 16 - slide rail, 17 - distance sensor, 18 - heating element, 19 - crushing rod, 20 - ring plate, 21 - spring. Detailed Embodiments

[0015] The following further describes the utility model with reference to the drawings, but does not limit the utility model in any way. Any change or improvement based on the utility model belongs to the protection scope of the utility model.

[0016] AsFigure 1 As shown in the figure, the utility model includes a recycling box 1 and a recycling pipe 2. A suction nozzle 3 is provided at the end of the recycling pipe 2. Adjusting mechanisms are symmetrically arranged on both sides of the suction nozzle 3. The adjusting mechanism includes a mounting plate 4 and a cylinder 5 arranged on the mounting plate 4. The mounting plate 4 is fixed on the suction nozzle 3. The piston rod of the cylinder 5 passes through the mounting plate 4 and is connected to a support plate 6. A roller 7 is arranged below the support plate 6. Since a large amount of heat is generated during the welding process, in order to prevent the roller 7 from being damaged by heat, the roller 7 can use a high-temperature-resistant bearing or a wheel made of heat-resistant rubber. An upright plate 8 is arranged in the upper part of the recycling box 1. One side of the recycling box 1 where the upright plate 8 is located is communicated with the recycling pipe 2. The top of the other side of the recycling box 1 is connected to a negative pressure fan 9. The negative pressure fan 9 is a prior art and a turbine fan can be used. A number of spikes 10 are arranged on the upright plate 8 facing the recycling pipe 2. A filter screen 11 is arranged in the recycling box 1 below the negative pressure fan 9. The filter screen 11 can filter out the flux and dust in the gas, prevent the flux and dust from entering the negative pressure fan 9, and extend the service life of the negative pressure fan 9. A material collecting cone is arranged in the recycling box 1 below the upright plate 8. A magnetic separator 12 is arranged at the lower port of the material collecting cone. The magnetic separator 12 is an existing device and is used to separate the iron filings in the flux. A primary vibrating screen 13 and a secondary vibrating screen 14 are successively arranged obliquely in the recycling box 1 below the magnetic separator 12. In the utility model, the aperture of the screen holes of the secondary vibrating screen 14 can be made smaller than that of the primary vibrating screen 13. The primary vibrating screen 13 is used to screen out the agglomerated and larger-sized flux in the flux. The oversize material is the agglomerated and larger-sized flux. The secondary vibrating screen 14 is used to screen out the dust in the flux. The undersize material is the dust, and the oversize material is the flux that meets the requirements and can be recycled. A blanking channel is left between the lower end of the secondary vibrating screen 14 and the side wall of the recycling box 1. A discharge plate 15 is arranged obliquely in the recycling box 1 below the secondary vibrating screen 14. The dust falls onto the discharge plate 15 and then is discharged. The recyclable flux falls from the blanking channel at the lower end of the secondary vibrating screen 14 and lands at the bottom of the recycling box 1 for storage.

[0017] The utility model is used for the on-line recycling of submerged arc welding flux. When in use, the negative pressure fan 9 is started. The negative pressure fan 9 generates negative pressure in the recovery box 1 and the recovery pipe 2, and generates suction at the end of the suction nozzle 3. The unmelted flux is sucked into the suction nozzle 3 under the action of the suction force, enters the recovery box 1 after being conveyed by the recovery pipe 2, and flies towards the direction of the vertical plate 8 under the action of inertia, collides with the spikes 10 arranged on the vertical plate 8, and breaks the agglomerated and caked flux. Subsequently, the flux falls under the action of gravity, falls into the magnetic separator 12, separates the iron filings mixed in the flux, discharges from the discharge port of the magnetic separator 12 and falls onto the primary vibrating screen 13. The materials on the screen are flux components with too large particles, and the remaining flux falls onto the secondary vibrating screen 14. The materials on the screen are flux with particles meeting the requirements. The materials on the screen fall from the lower end of the secondary vibrating screen 14, and fall into the bottom of the recovery box 1 for storage through the feeding channel. The materials under the screen of the secondary vibrating screen 14 are dust, and after falling onto the discharge plate 15, they are discharged from the lower end of the discharge plate 15. In the utility model, a magnetic separator 12 is arranged in the recovery box 1 to remove the iron filings mixed in the flux, improve the purity of the flux, ensure the weld quality after the flux is reused again, and improve the recycling effect of the flux; secondly, an adjusting mechanism is arranged on the suction nozzle 3 of the utility model. When it is necessary to adjust the distance between the suction nozzle 3 and the workpiece, with the roller 7 always in contact with the surface of the workpiece, the air cylinder 5 is started. The piston rod of the air cylinder 5 extends or shortens. When the piston rod of the air cylinder extends, the suction nozzle 3 moves upward. On the contrary, when the piston rod of the air cylinder shortens, the suction nozzle 3 moves downward, thereby realizing the adjustment of the height of the suction nozzle 3. The whole adjustment process is relatively convenient and fast, does not require manual operation, is time-saving and labor-saving. By adjusting the height of the suction nozzle 3, it can be ensured that there is always a suitable distance between the suction nozzle 3 and the workpiece, and thus it is ensured that the suction port of the suction nozzle 3 has sufficient suction to thoroughly recycle the flux on the workpiece.

[0018] A slide rail 16 is vertically arranged on the side wall of the suction nozzle 3, and one side of the support plate 6 is slidably connected with the slide rail 16 through a slider. In this device, the roller 7 is installed on the support plate 6. After the device has been used for a long time, or in case of accidental situations such as operation errors, the support plate 6 may be deformed, which may drive the roller 7 to deviate. Therefore, the slide rail 16 is provided. On the one hand, it guides the up and down movement of the support plate 6, so that the support plate 6 can move vertically up and down. On the other hand, it can also limit and position the support plate 6 to prevent the support plate 6 from deviating.

[0019] A distance sensor 17 with the probe facing downward is arranged on the suction nozzle 3. The distance sensor 17 is an existing detection instrument, which can detect the distance between the suction nozzle 3 and the workpiece. When this device is actually in use, when the distance detected by the distance sensor 17 is too small or too large, the height of the suction nozzle 3 can be adjusted through the adjusting mechanism.

[0020] A heating element 18 is provided inside the recycling bin 1 below the secondary vibrating screen 14. During the use of the present utility model, the flux after magnetic separation and screening falls and is stored in the lower part of the recycling bin 1. After the heating element 18 is provided, the heating element 18 can heat and keep the flux warm, improve the quality of the flux, and ensure that this part of the flux can be used normally.

[0021] A motor is installed on the vertical plate 8 above the filter screen 11. The output shaft of the motor is provided with a crushing rod 19 after passing through the vertical plate 8. The motor is a prior art. After the motor is started, the crushing rod 19 is driven to rotate through the output shaft. When the flux flies out from the end of the recycling pipe 2, the crushing rod 19 strikes the flying flux during rotation to prevent the flux from agglomerating and caking.

[0022] The inclination directions of the primary vibrating screen 13 and the secondary vibrating screen 14 are the same. A guide plate is inclined between the primary vibrating screen 13 and the secondary vibrating screen 14. The inclination direction of the guide plate is opposite to that of the primary vibrating screen 13, and a guide channel is left between the lower end of the guide plate and the side wall of the recycling bin 1. The flux is screened while moving downward on the primary vibrating screen 13. The flux passing through the primary vibrating screen 13 continuously falls and can be distributed in various parts of the secondary vibrating screen 14. Among them, part of the flux will fall to a position near the lower end of the secondary vibrating screen 14. The dust in this part of the flux has not had time to be separated and will fall from the lower end of the secondary vibrating screen 14 together with the flux, reducing the quality of the recycled flux. To solve this problem, the guide plate is provided. The flux falling from the primary vibrating screen 13 will all fall on the guide plate and slide downward along it until it falls from the guide channel at the lower end of the guide plate. The guide channel is located above the higher end of the secondary vibrating screen 14. In this way, all the flux falls to the higher end of the secondary vibrating screen 14 and has enough time to separate the ash, obtaining flux with better quality.

[0023] A telescopic pipe is connected between the end of the recycling pipe 2 and the suction nozzle 3. A ring plate 20 is provided at the end of the recycling pipe 2, and a spring 21 is provided between the ring plate 20 and the suction nozzle 3. One end of the spring 21 abuts against the ring plate 20, and the other end abuts against the suction nozzle 3. When installed, the spring 21 is in a compressed state and has a tendency to elongate, thereby generating a thrust on the suction nozzle 3. The thrust is transmitted to the roller 7, pressing the roller 7 against the workpiece. Through the setting of the spring 21, it is ensured that the roller 7 is always in contact with the workpiece, thereby ensuring the distance between the suction nozzle 3 and the workpiece and ensuring that the flux can be completely recycled.

Claims

1. An on-line recycling device for submerged arc welding flux, comprising a recycling box (1) and a recycling pipe (2), characterized in that : The end of the recovery pipe (2) is provided with a suction nozzle (3), and adjustment mechanisms are symmetrically arranged on both sides of the suction nozzle (3). The adjustment mechanism includes a mounting plate (4) and a cylinder (5) arranged on the mounting plate (4). The mounting plate (4) is fixed on the suction nozzle (3). The piston rod of the cylinder (5) passes through the mounting plate (4) and is connected with a support plate (6). A roller (7) is arranged below the support plate (6). A vertical plate (8) is arranged in the upper part of the recovery box (1). One side of the recovery box (1) where the vertical plate (8) is located is communicated with the recovery pipe (2), and the top of the other side of the recovery box (1) is connected with a negative pressure fan (9). A number of spikes (10) are arranged on the vertical plate (8) facing the recovery pipe (2). A filter screen (11) is arranged in the recovery box (1) below the negative pressure fan (9). A material collecting cone is arranged in the recovery box (1) below the vertical plate (8), and a magnetic separator (12) is arranged at the lower port of the material collecting cone. A primary vibrating screen (13) and a secondary vibrating screen (14) are sequentially arranged obliquely in the recovery box (1) below the magnetic separator (12). A blanking channel is left between the lower end of the secondary vibrating screen (14) and the side wall of the recovery box (1). A discharge plate (15) is arranged obliquely in the recovery box (1) below the secondary vibrating screen (14).

2. The on-line recycling device for submerged arc welding flux according to claim 1, characterized in that : A slide rail (16) is vertically arranged on the side wall of the suction nozzle (3), and one side of the support plate (6) is slidably connected with the slide rail (16) through a slider.

3. The on-line recycling device for submerged arc welding flux according to claim 1, characterized in that : A distance sensor (17) with the probe facing downwards is arranged on the suction nozzle (3).

4. The on-line recycling device for submerged arc welding flux according to claim 1, characterized in that : A heating element (18) is arranged in the recovery box (1) below the secondary vibrating screen (14).

5. The on-line recycling device for submerged arc welding flux according to claim 1, characterized in that : A motor is installed on the vertical plate (8) above the filter screen (11), and a crushing rod (19) is arranged on the output shaft of the motor after passing through the vertical plate (8).

6. The on-line recycling device for submerged arc welding flux according to claim 1, characterized in that : The primary vibrating screen (13) and the secondary vibrating screen (14) have the same inclination direction. A guide plate is arranged obliquely between the primary vibrating screen (13) and the secondary vibrating screen (14). The inclination direction of the guide plate is opposite to that of the primary vibrating screen (13), and a guide channel is left between the lower end of the guide plate and the side wall of the recovery box (1).

7. The on-line recycling device for submerged arc welding flux according to claim 1, characterized in that : A telescopic pipe is connected between the end of the recovery pipe (2) and the suction nozzle (3). A ring plate (20) is arranged at the end of the recovery pipe (2), and a spring (21) is arranged between the ring plate (20) and the suction nozzle (3).

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