Pipe welding clamp

Abstract

A pipe welding clamp comprises a base, a clamping assembly used for clamping a pipe is arranged at the top of the base, a moving plate is arranged at the top of the base, a mounting plate is arranged at the top of the moving plate, a rust removal roller is rotationally arranged on the mounting plate, and a dust collection assembly used for collecting dust is arranged on the mounting plate. The mounting plate is further provided with a rotating assembly used for driving the pipe to rotate, the rotating assembly is in transmission connection with the dust collection assembly and the rust removal roller, when the rotating assembly drives the pipe to rotate, the rust removal roller is synchronously driven to remove rust on the surface of the pipe, and meanwhile the dust collection assembly is driven to adsorb dust generated by rust removal. After rust and impurities on the surface of a pipe are cleaned before welding operation, the defects of slag inclusion, undercut, irregular forming and the like on the surface of a welding seam caused by mixing of oxides generated by rapid decomposition of the rust at high temperature of an electric arc and slag in the welding process can be avoided, and the appearance quality of the welding seam is influenced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding fixtures, in particular to a pipe welding fixture. BACKGROUND

[0002] In the implementation stage of pipe welding, the specific mechanical constraint structure of the welding fixture is used to position and clamp the pipe to be welded, so as to realize accurate positioning and stable clamping of the pipe, ensure that the pipe is always in the preset station without displacement deviation during welding, and effectively control the deformation of the pipe welding, meet the shape and position tolerance requirements of pipe welding. However, during storage, the outer surface of the pipe is prone to rust and the attachment of impurities and other pollutants due to factors such as temperature and humidity, and environmental dust. However, the current welding fixture has only single function, which can only realize basic clamping or centering positioning of the pipe, and lacks rust removal and cleaning ability for the surface of the pipe.

[0003] For example, the patent document with publication number "CN120155733A" and the name "Pipe welding fixture" includes a workbench, two transmission tables are installed above the workbench, the transmission direction of each transmission table is installed with a guide frame, a first pipe to be welded and a second pipe to be welded are arranged above the guide frames respectively, the guide frames are used to guide the first pipe to be welded and the second pipe to be welded to butt joint together, a rotating tooth disc is used to rotate the welding seat and weld the remaining butt joint points of the first pipe to be welded and the second pipe to be welded, a clamping unit is arranged in the guide frame, and the clamping unit is used to clamp and fix the first pipe to be welded and the second pipe to be welded.

[0004] In the above-mentioned document, the rust and impurities on the surface of the pipe cannot be cleaned before welding, so that in the welding process, the high temperature of the electric arc will promote the rapid decomposition of the rust, and the generated oxides will mix with the slag, resulting in defects such as slag inclusion, undercutting, irregular shaping, etc. on the surface of the weld, and additional labor hours are required for subsequent polishing and finishing, increasing the labor cost of production. SUMMARY

[0005] The present application aims to solve the technical problems that if the rust and impurities on the surface of the pipe are not cleaned before welding, the high temperature of the electric arc will promote the rapid decomposition of the rust, and the generated oxides will mix with the slag in the welding process.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: The utility model provides a kind of pipe welding fixture, including base, the top of base is provided with the clamping component for clamping pipe, the top of base is provided with moving plate, the top of moving plate is provided with mounting plate, rotatingly arranged with derusting roller on mounting plate, derusting roller is driven to rotate on mounting plate and is provided with dust suction component for dust suction, it is also provided with rotating component for driving pipe to rotate on mounting plate, rotating component is respectively with dust suction component and derusting roller transmission connection, when rotating component drives pipe to rotate, it is simultaneously driven to derusting roller to the surface of pipe and is carried out derusting, simultaneously also drive dust suction component to carry out adsorption to the dust generated by derusting.

[0007] Further, the mounting plate is rotatably provided with a third rotating shaft, one end of the third rotating shaft is fixedly connected with the derusting roller, and the third rotating shaft is in transmission connection with the rotating component.

[0008] Further, the dust suction component includes a storage box fixedly arranged on one side of the mounting plate and a dust suction cover covering the outside of the derusting roller, the dust suction cover is fixedly connected with the mounting plate, the dust suction cover is provided with an opening allowing the derusting roller to contact the pipe, and a dust suction channel for adsorbing dust is formed between the dust suction cover and the derusting roller, a cavity is formed in the third rotating shaft along the axial direction thereof, and dust suction holes are uniformly formed in the end of the third rotating shaft close to the derusting roller, the dust suction holes are in communication with the dust suction channel, the storage box is in communication with the cavity in the third rotating shaft, and a fan blade is rotatably arranged at one end of the storage box, the fan blade is in transmission connection with the rotating component.

[0009] Further, the bottom of the storage box is provided with a dust outlet, and a collection box is arranged below the dust outlet, a filter screen is fixedly arranged in the storage box above the dust outlet, and a guide plate is rotatably arranged at the dust outlet to close or open the dust outlet, the guide plate is provided with a control component for driving the guide plate to flip.

[0010] Further, the control component includes a traction rope fixedly arranged at the bottom of the guide plate and a fixed frame fixedly arranged at the bottom of the dust suction cover, a sliding plate is slidably arranged in the fixed frame, a spring is fixedly arranged between the sliding plate and the fixed frame, and one end of the traction rope is fixedly connected with the sliding plate.

[0011] Further, the top of the sliding plate is fixedly provided with a scraper, the scraper penetrates through the dust suction cover and is in sealed sliding cooperation with the dust suction cover, and the scraper scrapes off the dust adhered to the surface of the derusting roller when the scraper contacts the derusting roller.

[0012] Further, the clamping component includes a support plate fixedly arranged at the top of the base and a first V-shaped clamping plate, the top of the support plate is fixedly provided with a first electric push rod, the bottom of the first electric push rod is fixedly provided with a second V-shaped clamping plate, and the second V-shaped clamping plate and the first V-shaped clamping plate form a clamping space for clamping the pipe.

[0013] Further, the opposite ends of the first V-shaped clamping plate and the second V-shaped clamping plate are rotatably provided with rollers, the rotating assembly comprises a first motor fixedly arranged on the mounting plate, a first rotating shaft and a second rotating shaft rotatably arranged on the mounting plate, the opposite ends of the second rotating shaft are fixedly provided with rotating wheels, the first rotating shaft is coaxially fixedly connected with the first motor, and the first rotating shaft is connected with the second rotating shaft through a first belt transmission assembly.

[0014] Further, the top of the base is provided with a sliding groove along the length direction thereof, and the base is provided with a driving assembly for driving the movement of the moving plate, the driving assembly comprises a second motor fixedly arranged at one end of the base and a threaded rod rotatably arranged in the sliding groove, the second motor is coaxially fixedly connected with the threaded rod, the outer periphery of the threaded rod is threadedly connected with a sliding block, the sliding block is slidably connected with the sliding groove, and the sliding block is fixedly connected with the moving plate.

[0015] Further, the top of the moving plate is fixedly provided with a second electric push rod, and the output end of the second electric push rod is fixedly connected with the mounting plate.

[0016] The beneficial effects of the present application are: The mounting plate is rotatably provided with a rust removal roller, a dust suction assembly for dust suction, and a rotating assembly for driving the rotation of the pipe, and the rotating assembly is drivingly connected with the dust suction assembly and the rust removal roller. Before the pipe is welded, the rust removal treatment needs to be performed on the to-be-welded part of the pipe, and the rotating assembly is started to drive the pipe to rotate synchronously. The rotating assembly drives the rust removal roller to rotate synchronously through transmission, so that the rust is cleaned along the circumference of the pipe surface. At the same time, the rotating assembly drives the dust suction assembly to adsorb the dust generated by rust removal. Therefore, after the rust and impurities on the surface of the pipe are cleaned before the welding operation, not only can the oxides and slag mixed by the rapid decomposition of the rust under the high temperature of the electric arc in the welding process be avoided, which can cause defects such as slag inclusion, undercutting, irregular shaping, and affect the appearance quality of the weld, but also the additional investment of working hours for polishing and trimming in the subsequent process can be avoided, and the working hour cost of production is increased. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the present application; Figure 2 It is a right view of the present application; Figure 3 It is a perspective view of the rotating assembly and the dust suction assembly of the present application; Figure 4 It is Figure 3 It is a perspective view from another angle; Figure 5 It is Figure 3 It is a front view of the collecting box with the collecting box hidden; Figure 6 It is a sectional view of the dust suction assembly; Explanation of reference signs: 1, base; 2, support plate; 3, first V-shaped clamping plate; 4, first electric push rod; 5, second V-shaped clamping plate; 6, pipe; 7, roller; 8, moving plate; 9, sliding groove; 10, second motor; 11, threaded rod; 12, sliding block; 13, mounting plate; 14, second electric push rod; 15, first motor; 16, first rotating shaft; 17, second rotating shaft; 18, rotating wheel; 19, first belt transmission assembly; 20, rust removal roller; 21, third rotating shaft; 22, second belt transmission assembly; 23, storage box; 24, dust suction cover; 25, dust suction channel; 26, cavity; 27, dust suction hole; 28, connecting frame; 29, connecting shaft; 30, fan blade; 31, third belt transmission assembly; 32, ash outlet; 33, collection box; 34, guide plate; 35, filter screen; 36, fixed frame; 37, sliding plate; 38, spring; 39, scraper; 40, guide wheel; 41, traction rope. DETAILED DESCRIPTION

[0018] The technical solutions in the present application will be further described below in combination with the drawings and examples.

[0019] As shown in Figure 1 and Figure 2 , a pipe welding clamp comprises a base 1, a clamping assembly for clamping a pipe 6 is installed on the top of the base 1, the clamping assembly comprises a support plate 2 fixedly installed at the middle part of the top of the base 1 and a first V-shaped clamping plate 3, and the support plate 2 is of L-shaped structure. The top of the support plate 2 is fixedly installed with a first electric push rod 4, the bottom end of the first electric push rod 4 penetrates through the support plate 2 downward and is fixedly installed with a second V-shaped clamping plate 5, and the second V-shaped clamping plate 5 and the first V-shaped clamping plate 3 form a clamping space for clamping the pipe 6. In addition, the two ends of the first V-shaped clamping plate 3 opposite to the second V-shaped clamping plate 5 are rotatably installed with rollers 7.

[0020] The pipe 6 to be welded is placed between the two rollers 7 on the top of the first V-shaped clamping plate 3, the first electric push rod 4 is started to drive the second V-shaped clamping plate 5 to move towards the first V-shaped clamping plate 3, and then the two rollers 7 on the second V-shaped clamping plate 7 and the two rollers 7 on the first V-shaped clamping plate 3 cooperate with each other to clamp the pipe 6 and make the pipe 6 rotate under external force.

[0021] As shown in Figure 1As shown, the top of the base 1 is mounted with a moving plate 8, the top of the base 1 is provided with a sliding groove 9 along the length direction thereof, the base 1 is mounted with a driving assembly for driving the moving plate 8 to move, the driving assembly comprises a second motor 10 fixedly installed at one end of the base 1 and a threaded rod 11 rotatably installed in the sliding groove 9, the threaded rod 11 is arranged along the length direction of the sliding groove 9, a sliding block 12 is threadedly connected to the outer periphery of the threaded rod 11, the sliding block 12 is slidably connected with the sliding groove 9, and the top of the sliding block 12 is fixedly connected with the moving plate 8. The output end of the second motor 10 penetrates through the base 1 and is fixedly connected with the threaded rod 11 coaxially. The top of the moving plate 8 is mounted with a mounting plate 13, and the mounting plate 13 has a U-shaped structure. The top of the moving plate 8 is fixedly installed with a second electric push rod 14, the second electric push rod 14 is horizontally arranged, and the output end of the second electric push rod 14 penetrates through the moving plate 8 and is fixedly connected with the mounting plate 13.

[0022] As shown in Figures 1-3 , the mounting plate 13 is mounted with a rotating assembly for driving the pipe 6 to rotate, the rotating assembly comprises a first motor 15 fixedly installed at one side of the mounting plate 13, a first rotating shaft 16 and a second rotating shaft 17 rotatably installed on the mounting plate 13, the first rotating shaft 16 and the second rotating shaft 17 are arranged in parallel, and the two ends of the second rotating shaft 17 penetrate through the mounting plate 13 and are fixedly sleeved with rotating wheels 18, the rotating wheels 18 are rubber wheels, which facilitate to increase the friction between the rotating wheels 18 and the pipe 6. One end of the first rotating shaft 16 is fixedly connected with the first motor 15 coaxially, and the first rotating shaft 16 is drivingly connected with the second rotating shaft 17 through a first belt transmission assembly 19. The first belt transmission assembly 19 comprises two pulleys and a transmission belt sleeved on the outer periphery of the two pulleys, and the two pulleys are fixedly sleeved on the outer periphery of the first rotating shaft 16 and the second rotating shaft 17 respectively.

[0023] As shown in Figure 4 , the mounting plate 13 is further rotatably installed with a derusting roller 20, and the derusting roller 20 is a grinding wheel derusting roller 20. The mounting plate 13 is rotatably installed with a third rotating shaft 21 parallel to the first rotating shaft 16, one end of the third rotating shaft 21 penetrates through the mounting plate 13 and is fixedly connected with the derusting roller 20. The third rotating shaft 21 is connected with the first rotating shaft 16 through a second belt transmission assembly 22.

[0024] When the rust removal treatment needs to be performed on the to-be-welded part of the pipe 6, the second motor 10 is started to drive the threaded rod 11 to rotate, the threaded rod 11 drives the sliding block 12 to move along the sliding groove 9, and then the sliding block 12 drives the moving plate 8 and the mounting plate 13 to move synchronously, so that the rust removal roller 20 on the mounting plate 13 moves to the position where the rust removal is needed on the pipe 6. Then the second electric push rod 14 is started to push the mounting plate 13 to move horizontally, so that the rotating wheel 18 on the mounting plate 13 simultaneously contacts the outer surface of the pipe 6 with the rust removal roller 20. Finally, the first motor 15 is started, the output shaft of the first motor 15 drives the first rotating shaft 16 to rotate, the first rotating shaft 16 drives the second rotating shaft 17 to rotate through the first belt transmission assembly 19, the second rotating shaft 17 synchronously drives the rotating wheel 18 to rotate, and the rotating wheel 18 drives the pipe 6 to rotate synchronously by utilizing the friction between the rotating wheel 18 and the pipe 6. At the same time, the first rotating shaft 16 drives the third rotating shaft 21 to rotate through the second belt transmission assembly 22, the third rotating shaft 21 drives the rust removal roller 20 to rotate synchronously, so that the rust is cleaned along the circumference of the pipe 6. After the rust on the outer circumference of the pipe 6 is cleaned, the to-be-welded part of the pipe 6 can be welded.

[0025] Therefore, after the rust and impurities on the surface of the pipe 6 are cleaned before the welding operation, firstly, not only the oxides and slag mixed by the rapid decomposition of the rust under the high temperature of the electric arc in the welding process are avoided, which causes defects such as slag inclusion, undercutting, irregular shaping and the like on the surface of the weld, and affects the appearance quality of the weld, but also the additional investment of working hours for polishing and finishing in the subsequent process is avoided, and the working hour cost of production is increased. Secondly, the gas holes formed in the weld can also be prevented, which not only weakens the stress area of the weld, causes the overall strength of the weld to be greatly reduced, but also damages the compactness of the weld, and in the later process of using the pipe 6 to transport liquid medium, the medium may leak outward through the weld, which has a security risk.

[0026] As Figures 3-6As shown, the mounting plate 13 is provided with a dust collection assembly for dust collection, which includes a storage box 23 fixedly mounted on the side of the mounting plate 13 away from the rust removal roller 20 and a dust cover 24 covering the outside of the rust removal roller 20, one end of the dust cover 24 being fixedly connected with the mounting plate 13. The dust cover 24 is provided with an opening allowing the rust removal roller 20 to contact the outer surface of the pipe 6, and a dust collection channel 25 for dust collection is formed between the dust cover 24 and the rust removal roller 20. A cavity 26 is formed in the third rotating shaft 21 along the axial direction thereof, and a plurality of dust collection holes 27 in communication with the interior of the third rotating shaft 21 are uniformly formed in the end of the third rotating shaft 21 close to the rust removal roller 20, the dust collection holes 27 being in communication with the dust collection channel 25. The storage box 23 is hollow and in communication with the cavity 26 in the third rotating shaft 21. The end of the storage box 23 away from the mounting plate 13 is open, and a connecting frame 28 is fixedly mounted at the opening, a connecting shaft 29 being rotatably mounted at the center of the connecting frame 28, a plurality of fan blades 30 being fixedly mounted on the outer periphery of the connecting shaft 29 and located in the storage box 23. The connecting shaft 29 is connected with the first rotating shaft 16 through a third belt transmission assembly 31.

[0027] When the first rotating shaft 16 rotates, the third belt transmission assembly 31 synchronously drives the connecting shaft 29 to rotate, the connecting shaft 29 drives the fan blades 30 to rotate, and the rotation of the fan blades 30 causes a certain vacuum in the storage box 23, thereby generating a negative pressure suction force. Under the action of the suction force, the dust generated when the rust removal roller 20 cleans the rust on the surface of the pipe 6 will be sequentially collected into the storage box 23 through the dust collection channel 25, the dust collection holes 27 and the cavity 26, thereby avoiding the spread of dust into the air and harming the health of the operators. At the same time, dust pollution of the working environment is prevented.

[0028] The first belt transmission assembly 19, the second belt transmission assembly 22 and the third belt transmission assembly 31 have the same structure, and the diameters of the belt pulleys respectively externally sleeved on the first rotating shaft 16, the second rotating shaft 17, the third rotating shaft 21 and the connecting shaft 29 can be adjusted according to the actual rotating speeds of the shafts, thereby adjusting the transmission ratios between the shafts.

[0029] As shown in the drawings, Figures 4-6 The bottom of the storage box 23 is provided with a dust outlet 32, and a collection box 33 is detachably mounted on the bottom of the storage box 23 and connected with the storage box 23 through bolts (not shown in the drawings). The collection box 33 is located directly below the dust outlet 32, and a guide plate 34 is rotatably mounted at the dust outlet 32 to close or open the dust outlet 32, and the guide plate 34 is provided with a control assembly for driving the guide plate 34 to flip. A filter screen 35 is fixedly mounted in the storage box 23 and located above the dust outlet 32, and the filter screen 35 can block the impact of dust on the fan blades 30 and intercept dust falling on the top of the guide plate 34.

[0030] As shown in the drawings, Figures 4-6As shown, the control assembly comprises a traction rope 41 fixedly installed at the bottom of the guide plate 34 and a fixed frame 36 fixedly installed at the bottom of the dust cover 24, a sliding plate 37 is vertically slidably installed in the fixed frame 36, a plurality of springs 38 are uniformly fixedly installed between the sliding plate 37 and the fixed frame 36, and the springs 38 support and reset the sliding plate 37. The end of the traction rope 41 away from the guide plate 34 penetrates through the fixed frame 36 and is fixedly connected with the bottom of the sliding plate 37. Because the outer surface of the rust removal roller 20 will adhere to rust powder and other impurities during the rust removal process, a scraper 39 is fixedly installed at the top of the sliding plate 37, and the length of the scraper 39 is adapted to the length of the rust removal roller 20. The scraper 39 penetrates through the dust cover 24 upward and is in sealing sliding fit with the dust cover 24, and the scraper 39 scrapes the rust powder and other impurities adhered to the surface of the rust removal roller 20 when the scraper 39 is in contact with the rust removal roller 20.

[0031] In the initial state, the guide plate 34 is in the open state, and the scraper 39 is in contact with the rust removal roller 20. When the fan blade 30 rotates to form a certain vacuum degree in the storage box 23, the external atmospheric pressure will push the guide plate 34 to turn upward, so as to close the ash outlet 32. At the same time, the dust inlet channel in the storage box 23 generates a high-speed airflow due to the negative pressure, and according to Bernoulli's principle, the increase of flow rate leads to the decrease of pressure, so that the pressure above the guide plate 34 decreases, and the pressure difference below the guide plate 34 can drive the guide plate 34 to turn upward. In the process of turning the guide plate 34 upward, the sliding plate 37 is driven to move downward synchronously by the traction rope 41, so that the springs 38 are compressed and contracted; at the same time, the sliding plate 37 drives the scraper 39 to separate from the rust removal roller 20, so as to avoid the continuous contact between the rust removal roller 20 and the scraper 39 during the rotation of the rust removal roller 20, and reduce the wear degree of the two.

[0032] When the dust sucked into the storage box 23 continuously accumulates on one side of the filter screen 35 and the top of the guide plate 34, the dust accumulated on the top of the guide plate 34 will gradually hinder the air passing through the filter screen 35, so as to weaken the vacuum degree in the storage box 23 and slow down the airflow in the storage box 23. When the force driving the guide plate 34 to close the ash outlet 32 is less than the resetting force of the springs 38, the resetting force of the springs 38 will drive the sliding plate 37 to move upward, the upward movement of the sliding plate 37 drives the scraper 39 to move upward and contact the rust removal roller 20, so as to clean the rust powder and other impurities adhered to the surface of the rust removal roller 20. The upward movement of the sliding plate 37 is transmitted to the guide plate 34 through the traction rope 41, and drives the guide plate 34 to turn downward. In this process, the dust accumulated on the top of the guide plate 34 will fall into the collection box 33 under the action of its own gravity and the guiding action of the guide plate 34, so as to realize the collection of the dust. In addition, the dust in the collection box 33 can be cleaned by regularly disassembling the bolts connecting the collection box 33 and the storage box 23.

[0033] In order to reduce the friction resistance of the traction rope 41 and adjust the opening angle of the guide plate 34, the guide wheel 40 is rotatably installed at the bottom of the mounting plate 13, and the traction rope 41 is correspondingly arranged on the outer periphery of the guide wheel 40. By using the rolling effect of the guide wheel 40, the friction resistance of the traction rope 41 during movement is reduced, and the transmission is smoother. At the same time, by using the guiding effect of the guide wheel 40 and cooperating with the traction effect of the sliding plate 37 on the traction rope 41, the opening angle of the guide plate 34 can be controlled to thirty degrees, so as to avoid that the guide plate 34 cannot drive the ash outlet 32 to close under the action of the atmospheric pressure outside the storage box 23 when the opening angle of the guide plate 34 is too large.

[0034] And the spring 38 elastic force and the pressure below the guide plate 34 drive the upward turning force of the guide plate 34 to match linearly, so as to make the guide plate 34 slowly close the ash outlet 32, avoid that the pressure below the guide plate 34 drives the guide plate 34 to quickly close the ash outlet 32 when the dust above the guide plate 34 has not completely fallen into the collection box 33.

[0035] In order to optimize the cleaning effect of the rust removal roller 20, the top of the scraper 39 is uniformly provided with bristles (not shown in the figure). By virtue of the elastic properties of the bristles, when the bristles come into contact with the rust removal roller 20, the bristles will continue to move upward and deform with the scraper 39. Therefore, when the sliding plate 37 gradually moves downward, the deformed bristles will slowly recover to the original state, and the duration of the recovery process is longer than the time required for the rust removal roller 20 to rotate one circle, so that the bristles can keep in contact with the rust removal roller 20 during the rotation of the rust removal roller 20, avoiding the situation that the scraper 39 is separated from the rust removal roller 20 before completing one circle cleaning along the rust removal roller 20 during the process of closing the ash outlet 32 by the guide plate 34, so as to ensure the cleaning effect of the rust removal roller 20.

[0036] (not shown in the figure) In another embodiment, a hydraulic push rod is fixedly installed at the top of the storage box 23, the output end of the hydraulic push rod penetrates through the storage box 23 and is fixedly connected with the cleaning plate, and the cleaning plate is in close contact with the surface of the filter screen 35. By periodically starting the hydraulic push rod, the cleaning plate can drive the dust attached to the surface of the filter screen 35 to be cleaned, effectively avoiding that the filter screen 35 is blocked by dust and causes the dust suction force to decay when the fan blade 30 rotates.

[0037] In addition, in order to prevent dust from falling into the collection box 33 when the guide plate 34 is opened, a controller with a built-in PLC control program is provided on the base 1, which is electrically connected with the first motor 15. The first motor 15 is a servo motor. The PLC program can control the periodic speed reduction of the first motor 15, thereby periodically reducing the speed of the fan blade 30, reducing the dust adsorption force on the top of the guide plate 34 during the opening of the guide plate 34, and then making the dust accumulated on the top of the guide plate 34 fall into the collection box 33 along the guide plate 34. It is also convenient for the scraper 39 to clean the dust and impurities adhered to the outer surface of the rust removal roller 20.

[0038] Working principle: When in use, the pipe 6 to be welded is placed between the two rollers 7 on the top of the first V-shaped clamping plate 3, and the first electric push rod 4 is started to drive the second V-shaped clamping plate 5 to move towards the first V-shaped clamping plate 3, so that the two rollers 7 on the second V-shaped clamping plate 5 cooperate with the two rollers 7 on the first V-shaped clamping plate 3 to clamp the pipe 6 and make the pipe 6 rotate under external force.

[0039] During the welding process of the pipe 6, when the rust removal treatment is needed for the part to be welded of the pipe 6, the second motor 10 is started to drive the threaded rod 11 to rotate, the threaded rod 11 drives the sliding block 12 to move along the sliding groove 9, and then the sliding block 12 drives the moving plate 8 and the mounting plate 13 to move synchronously, so that the rust removal roller 20 on the mounting plate 13 moves to the position where the rust removal is needed for the pipe 6. Then the second electric push rod 14 is started to push the mounting plate 13 to move horizontally, so that the rotating wheel 18 on the mounting plate 13 simultaneously contacts the outer surface of the pipe 6. Finally, the first motor 15 is started, the output shaft of the first motor 15 drives the first rotating shaft 16 to rotate, the first rotating shaft 16 drives the second rotating shaft 17 to rotate through the first belt transmission assembly 19, the second rotating shaft 17 synchronously drives the rotating wheel 18 to rotate, and the rotating wheel 18 drives the pipe 6 to rotate synchronously by utilizing the friction between the pipe 6 and the rotating wheel 18. At the same time, the first rotating shaft 16 drives the third rotating shaft 21 to rotate through the second belt transmission assembly 22, and the third rotating shaft 21 drives the rust removal roller 20 to rotate synchronously, thereby cleaning the rust along the circumference of the pipe 6. After the rust on the circumference of the pipe 6 is cleaned, the part to be welded of the pipe 6 can be welded.

[0040] At the same time, during the rotation of the first rotating shaft 16, the third belt transmission assembly 31 synchronously drives the connecting shaft 29 to rotate, the connecting shaft 29 drives the fan blade 30 to rotate, and the fan blade 30 rotates to generate a certain vacuum in the storage box, thereby generating a negative pressure suction force. Under the action of the suction force, the dust generated when the rust removal roller 20 cleans the rust on the surface of the pipe 6 will be sequentially sucked into the storage box 23 through the dust suction channel 25, the dust suction hole 27 and the cavity 26, and the collection is completed.

[0041] Since the guide plate 34 is in the open state at the initial state, the scraper 39 keeps in contact with the rust removal roller 20. When the fan blade 30 rotates to form a certain vacuum degree inside the storage box 23, the external atmospheric pressure will push the guide plate 34 to turn upward, so as to promote the closing of the ash outlet 32. At the same time, the dust inlet channel in the storage box 23 generates a high-speed airflow due to the negative pressure, and according to Bernoulli's principle, the increase of the flow rate leads to the decrease of the pressure, so that the pressure above the guide plate 34 decreases, and the pressure difference below the guide plate 34 can drive the guide plate 34 to turn upward. During the turning of the guide plate 34, the sliding plate 37 is synchronously lowered by the traction rope 41, so that the spring 38 is compressed and shrunk. At the same time, the sliding plate 37 drives the scraper 39 to separate from the rust removal roller 20, so as to avoid the continuous friction between the two and aggravate the wear degree of the two.

[0042] When the dust sucked into the storage box 23 is continuously accumulated on one side of the filter screen 35 and the top of the guide plate 34, the dust accumulated on the top of the guide plate 34 will gradually hinder the air passing through the filter screen 35, so as to weaken the vacuum degree in the storage box 23 and slow down the airflow in the storage box 23. When the restoring force of the spring 38 drives the sliding plate 37 to move upward, the upward movement of the sliding plate 37 drives the scraper 39 to move upward and contact the rust removal roller 20, so as to clean the rust powder and other impurities adhered to the surface of the rust removal roller 20, and the cleaned impurities are adsorbed into the storage box 23. The upward movement of the sliding plate 37 is transmitted to the guide plate 34 through the traction rope 41, and drives the guide plate 34 to turn downward. During the turning of the guide plate 34, the dust accumulated on the top of the guide plate 34 will fall into the collecting box 33 under the action of gravity, so as to realize the collection of the dust. In addition, the dust in the collecting box 33 can be cleaned by regularly disassembling the bolts connected between the collecting box 33 and the storage box 23.

[0043] The present application can clean the rust on the pipe 6 to be welded, avoid the influence of the rust on the welding quality, and simultaneously adsorb the dust generated in the rust removal, so as to prevent the dust from spreading into the air and polluting the environment.

[0044] In addition, in the process of adsorbing dust, the dust suction assembly is automatically opened and closed by cooperating with the control assembly to drive the guide plate 34, thereby timely discharging the dust accumulated on the top of the guide plate 34, avoiding the decrease of adsorption efficiency caused by dust accumulation, and in the process of discharging dust, the control assembly also drives the scraper 39 to scrape and clean the rust powder and other impurities adhered to the outer periphery of the rust removal roller 20, thereby realizing the automatic cleaning of the outer periphery of the rust removal roller 20, avoiding the rust powder and other impurities adhered to the outer surface of the rust removal roller 20 for a long time, and affecting the cleaning efficiency after accumulation to a certain degree. In combination with the overall working process of the device, the device not only reduces the input cost of the driving source, but also improves the degree of automation of the device.

[0045] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A pipe welding fixture, comprising a base (1), characterized in that, The base (1) is provided with a clamping assembly for clamping the pipe (6) at the top. The base (1) is provided with a movable plate (8) at the top. The movable plate (8) is provided with a mounting plate (13) at the top. A rust removal roller (20) is rotatably mounted on the mounting plate (13). A dust collection assembly for dust collection is provided on the mounting plate (13). A rotating assembly for driving the pipe (6) to rotate is also provided on the mounting plate (13). The rotating assembly is connected to the dust collection assembly and the rust removal roller (20) respectively. When the rotating assembly drives the pipe (6) to rotate, it simultaneously drives the rust removal roller (20) to remove rust from the surface of the pipe (6). At the same time, it also drives the dust collection assembly to absorb the dust generated during rust removal.

2. The pipe welding fixture according to claim 1, characterized in that, The mounting plate (13) is rotatably provided with a third rotating shaft (21), one end of which is fixedly connected to the rust removal roller (20), and the third rotating shaft (21) is connected to the rotating assembly for transmission.

3. The pipe welding fixture according to claim 2, characterized in that, The dust collection assembly includes a storage box (23) fixedly mounted on one side of the mounting plate (13) and a dust collection cover (24) covering the outside of the rust removal roller (20). The dust collection cover (24) is fixedly connected to the mounting plate (13). An opening is provided on the dust collection cover (24) to allow the rust removal roller (20) to contact the pipe (6). A dust collection channel (25) for adsorbing dust is formed between the dust collection cover (24) and the rust removal roller (20). A cavity (26) is provided in the third rotating shaft (21) along its axial direction. Dust collection holes (27) are evenly provided at the end of the third rotating shaft (21) near the rust removal roller (20). The dust collection holes (27) are connected to the dust collection channel (25). The storage box (23) is connected to the cavity (26) in the third rotating shaft (21). A fan blade (30) is rotatably provided at one end of the storage box (23). The fan blade (30) is connected to the rotating assembly for transmission.

4. The pipe welding fixture according to claim 3, characterized in that, The storage box (23) has an ash outlet (32) at the bottom and a collection box (33) at the bottom. The collection box (33) is located directly below the ash outlet (32). A filter screen (35) is fixedly installed inside the storage box (23). The filter screen (35) is located above the ash outlet (32). A guide plate (34) is rotatably installed at the ash outlet (32) to close or open it. The guide plate (34) is equipped with a control component for driving it to flip.

5. The pipe welding fixture according to claim 4, characterized in that, The control component includes a traction rope (41) fixedly installed at the bottom of the guide plate (34) and a fixed frame (36) fixedly installed at the bottom of the dust hood (24). A sliding plate (37) is slidably installed inside the fixed frame (36). A spring (38) is fixedly installed between the sliding plate (37) and the fixed frame (36). The sliding plate (37) is fixedly connected to one end of the traction rope (41).

6. The pipe welding fixture according to claim 5, characterized in that, A scraper (39) is fixedly installed on the top of the sliding plate (37). The scraper (39) passes through the dust collection hood (24) and is sealed and slides in cooperation with the dust collection hood (24). When the scraper (39) comes into contact with the rust removal roller (20), it scrapes off the dust adhering to its surface.

7. The pipe welding fixture according to claim 1, characterized in that, The clamping assembly includes a support plate (2) fixedly disposed on the top of the base (1) and a first V-shaped clamping plate (3). A first electric push rod (4) is fixedly disposed on the top of the support plate (2), and a second V-shaped clamping plate (5) is fixedly disposed on the bottom of the first electric push rod (4). The second V-shaped clamping plate (5) and the first V-shaped clamping plate (3) form a clamping space for clamping the pipe (6).

8. The pipe welding fixture according to claim 7, characterized in that, Rollers (7) are rotatably provided at both ends of the first V-shaped clamping plate (3) and the second V-shaped clamping plate (5). The rotating assembly includes a first motor (15) fixedly mounted on the mounting plate (13), a first rotating shaft (16) and a second rotating shaft (17) rotatably mounted on the mounting plate (13). Rotating wheels (18) are fixedly provided at both ends of the second rotating shaft (17). The first rotating shaft (16) is coaxially fixedly connected to the first motor (15). The first rotating shaft (16) is connected to the second rotating shaft (17) through the first belt drive assembly (19).

9. The pipe welding fixture according to claim 1, characterized in that, The top of the base (1) is provided with a slide groove (9) along its length direction. The base (1) is provided with a drive assembly for moving the movable plate (8). The drive assembly includes a second motor (10) fixedly installed at one end of the base (1) and a threaded rod (11) rotatably installed in the slide groove (9). The second motor (10) and the threaded rod (11) are coaxially fixedly connected. The outer circumference of the threaded rod (11) is threadedly connected with a slider (12). The slider (12) is slidably connected to the slide groove (9) and is fixedly connected to the movable plate (8).

10. The pipe welding fixture according to claim 1, characterized in that, The top of the movable plate (8) is fixedly provided with a second electric push rod (14), and the output end of the second electric push rod (14) is fixedly connected to the mounting plate (13).

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