A kind of tungsten alloy pipe wall sand blasting equipment is plated

Abstract

The present application relates to the field of polishing equipment, disclose a kind of tungsten alloy plating infiltration oil pipe inner wall sand blasting polishing equipment, including machine body, lifting mechanism and multiple polishing mechanism, polishing mechanism includes fixture assembly, injection assembly and rotary component, injection assembly includes clamping block, air pipe, swivel pipe, sleeve and sealing pipe, sleeve is vertically fixedly sleeved in clamping block, and vertically set with spray hole, swivel pipe is vertically rotatably sleeved in sleeve, and vertically set with multiple storage cavities in inside, air pipe side portion vertically set with air hole, air hole is aligned with spray hole, spring is fixedly embedded in sealing pipe wall, sleeve is slidably sleeved in clamping plate, air pipe top end is connected with pneumatic mechanism, swivel pipe top end is connected with feeding mechanism, fixture assembly is set on lifting mechanism.The present application solves the problem that the equipment output caliber cannot be flexibly adjusted according to the polishing requirements of oil pipe, cannot realize sufficient polishing in single pass, and the polishing efficiency is low.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, specifically to a sandblasting and grinding equipment for the inner wall of a tungsten alloy coated oil pipe. Background Technology

[0002] Tungsten alloy coated oil pipes significantly improve wear and corrosion resistance by incorporating tungsten alloy protective layers on both the inner and outer sides of the pipe, leading to their increasingly widespread use in oilfield production equipment. Before applying the tungsten alloy coating, the inner wall must undergo thorough sandblasting pretreatment to remove surface impurities and create a uniform roughness, thereby enhancing the adhesion between the coating and the substrate. Sandblasting is a process that uses compressed air to propel abrasive particles at high speed onto the workpiece surface to remove rust, scale, and other impurities, achieving the desired surface roughness. It is suitable for grinding the inner wall of oil pipes.

[0003] In existing sandblasting and grinding equipment, such as the invention patent application with publication number CN119526228A which discloses a rust removal device for water pipes in water conservancy projects, and the utility model patent with authorization announcement number CN221232176U which discloses a polishing and grinding device for metal pipes, the opening diameter of the nozzles used for spraying abrasive in the above-mentioned existing equipment is a fixed size, and the diameter of the spray coverage area is fixed. It is impossible to flexibly adjust according to the specific specifications of the oil pipe or the grinding needs of different areas of the inner wall. Due to the limited spray coverage area, it is impossible to achieve sufficient grinding in a single pass, resulting in low overall grinding efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a sandblasting and grinding device for the inner wall of tungsten alloy coated oil pipes, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A sandblasting and polishing device for the inner wall of a tungsten alloy coated oil pipe includes a machine body, a lifting mechanism, and multiple polishing mechanisms, wherein the multiple polishing mechanisms are arranged on the upper side of the machine body via the lifting mechanism; The grinding mechanism includes a jig assembly, a spray assembly, and a rotating component. The spray assembly includes a clamping block, an air pipe, a rotating pipe, a sleeve, and a sealing pipe. The clamping block is vertically fixedly installed on the front side of the lifting mechanism. The sleeve is vertically fixedly fitted inside the clamping block and has a vertically opened spray hole. The rotating pipe is vertically rotatably fitted inside the sleeve and has multiple vertically opened material storage chambers inside. The air pipe is vertically fitted inside the rotating pipe and its bottom end is fixedly connected to the bottom of the sleeve. The side of the air pipe has a vertically opened air hole, which is aligned with the spray hole. The sealing pipe is slidably fitted on the outside of the sleeve and a spring is fixedly embedded in the pipe wall. The top end of the sealing pipe is fixedly connected to the bottom side of the clamping block. The sleeve is slidably fitted on a clamping plate, and the clamping plate is rotatably connected to the bottom end of the sealing pipe. The top end of the air pipe is connected to the pneumatic mechanism, the top end of the rotating pipe is connected to the feeding mechanism, the fixture assembly is mounted on the lifting mechanism and located directly below the spraying assembly, and the rotating component is mounted on the front side of the clamping block to drive the rotating pipe to rotate.

[0006] As another possible implementation, the rotating component includes a motor, a first gear, and a second gear. The motor is fixedly mounted on the front side of the clamping block, the first gear is fixedly sleeved on the motor output shaft end, and the second gear is fixedly sleeved on the rotating tube and meshes with the first gear.

[0007] As another feasible implementation, the lifting mechanism includes a linkage assembly, two first screws, a support plate, two second screws, and a truss. A ladder is fixedly installed on the upper side of the machine body. The two first screws are vertically rotatably sleeved in the ladder and are symmetrically arranged. The two second screws are vertically rotatably sleeved on the upper side of the machine body and are symmetrically arranged. The support plate is horizontally arranged and symmetrically rotatably sleeved on the two second screws on both sides. The truss is horizontally arranged and symmetrically rotatably sleeved on the two first screws on both sides. The locking block is fixedly installed on the front side of the truss. The fixture assembly is vertically arranged in the support plate. The two first screws and the two second screws are driven to rotate simultaneously by the linkage assembly.

[0008] As another feasible method, the feeding mechanism includes a material box, multiple conduits and multiple sleeves. The multiple sleeves are rotatably fitted onto the top of the multiple conduits. The material box is horizontally fixedly installed on the upper side of the truss by a connecting frame. The multiple conduits are all vertically arranged, and their upper and lower ends are fixedly connected to the bottom output end of the material box and the top of the sleeves, respectively. The top of the air pipe extends out of the conduit.

[0009] As another feasible approach, the pneumatic mechanism includes an air pump device, a hose, a connecting pipe, and a horizontal pipe. The horizontal pipe is horizontally fixedly installed at the top of multiple air pipes. The connecting pipe is vertically fixedly installed on the rear side of the truss by two clamps, and its top end is fixedly connected to the horizontal pipe for conduction. The air pump device is horizontally fixedly installed on the upper side of the ladder platform. The hose is fixedly connected at both ends to the output end of the air pump device and the bottom end of the connecting pipe, respectively.

[0010] As another feasible approach, the fixture assembly includes a turntable and three sets of clamping components. The turntable is vertically rotatably mounted inside a support plate and has three vertically opened holes inside, which are evenly distributed in a ring. The three sets of clamping components are evenly arranged in a ring on the upper side of the turntable. A dustproof cylinder is vertically fixedly mounted on the bottom side of the support plate. A dust collection device is provided inside the bottom side of the machine body. The bottom end of the dustproof cylinder is fixedly connected to the input end of the dust collection device. Multiple turntables are connected by a drive component, and the turntables rotate under the drive of the drive component.

[0011] As another feasible implementation, the clamping component includes an insert block, a slider, a third screw, a pressure block, and a bracket. The insert block is vertically fixedly installed on the upper side of the turntable. The slider is horizontally slidably fitted inside the insert block. The pressure block is vertically fixedly installed on the inner end of the slider. The bracket is horizontally fixedly installed on the outer side of the insert block. The outer end of the third screw is horizontally rotatably fitted inside the bracket, and the inner end is threadedly fitted inside the slider. The pressure block is fixedly installed on the inner end of the slider. The three third screws are connected by a transmission component, which includes three third gears and a gear ring. The three third gears are respectively fixedly fitted onto the outer ends of the three third screws. The gear ring is rotatably embedded on the outer side of the three brackets and meshes with the three third gears. A locking hole is provided on the outer end of the third screw, and the locking hole is hexagonal in shape.

[0012] Compared with the prior art, the present invention provides a sandblasting and grinding device for the inner wall of a tungsten alloy coated oil pipe, which has the following beneficial effects: (1) By having the nozzle and the inner wall of the oil pipe of equal length in the vertical direction, the effective length automatically matches the length of the oil pipe, covering the internal height of the oil pipe. With the rotation of the oil pipe, the inner wall of the oil pipe can be polished efficiently, thus improving the polishing efficiency. (2) During the rotation of the rotating pipe, when the area between the two storage chambers is aligned with the air hole and the nozzle, the channel is closed and the airflow is blocked, so that the pressure can be increased. After the storage chamber is aligned with the air hole and the nozzle, the sand can be sprayed out more powerfully, so as to polish the inner wall of the oil pipe more powerfully and further improve the polishing efficiency. (3) After the sprayed sand impacts the inner wall of the oil pipe to complete the grinding operation, it will fall downwards and eventually be discharged through the drain hole in the turntable. It will then be discharged into the dust collection device inside the machine body through the dustproof cylinder. The oil pipe itself seals the sand to avoid splashing, which can effectively reduce sand and dust pollution. Attached Figure Description

[0013] Figure 1 This is a frontal three-dimensional structural diagram of a sandblasting and grinding equipment for the inner wall of a tungsten alloy coated oil pipe proposed in this invention. Figure 2 This is a rear-view three-dimensional structural diagram of a sandblasting and grinding equipment for the inner wall of a tungsten-plated alloy oil pipe proposed in this invention. Figure 3 This is a partial side view cross-sectional structural diagram of a sandblasting and grinding equipment for the inner wall of a tungsten alloy coated oil pipe proposed in this invention. Figure 4 This is a top view of a partial cross-sectional structure of the spraying component in a tungsten alloy coated oil pipe inner wall sandblasting and grinding equipment proposed in this invention. Figure 5 for Figure 1 Enlarged view of the structure at point A in the image; Figure 6 for Figure 1Enlarged view of the structure at point B in the image; Figure 7 for Figure 3 Enlarged view of the structure at point C.

[0014] In the diagram: 1. Machine body; 101. Ladder platform; 2. Clamping block; 3. Air pipe; 301. Air port; 4. Rotary pipe; 401. Material storage chamber; 5. Sleeve; 501. Spray nozzle; 6. Sealing pipe; 7. Clamping plate; 8. Motor; 9. First gear; 10. Second gear; 11. First screw; 12. Support plate; 13. Second screw; 14. Truss; 15. First motor; 16. Drive shaft; 17. First worm head; 18. First worm wheel; 19. Material box; 20. Conduit; 21. Compression sleeve; 22. Connecting frame; 23. Air pump device; 24. Hose; 25. Connecting pipe; 26. Horizontal pipe; 27. Compression frame; 28. Turntable; 281. Leakage hole; 29. ​​Dustproof sleeve; 30. Second motor; 31. Main shaft; 32. Second worm head; 33. Second worm wheel; 34. Insert block; 35. Slider; 36. Third screw; 361. Locking hole; 37. Pressure block; 38. Inserting frame; 39. Third gear; 40. Gear ring. Detailed Implementation

[0015] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the invention.

[0016] See Figure 1-7 A sandblasting and polishing device for the inner wall of a tungsten alloy coated oil pipe includes a machine body 1, a lifting mechanism and multiple polishing mechanisms, wherein the multiple polishing mechanisms are arranged on the upper side of the machine body 1 through the lifting mechanism. The grinding mechanism includes a jig assembly, a spray assembly, and a rotating component. The spray assembly includes a clamping block 2, an air pipe 3, a rotating pipe 4, a sleeve 5, and a sealing pipe 6. The clamping block 2 is vertically fixedly installed on the front side of the lifting mechanism. The sleeve 5 is vertically fixedly fitted inside the clamping block 2 and has a vertically opened spray hole 501. The rotating pipe 4 is vertically rotated and fitted inside the sleeve 5, and has multiple vertically opened material storage chambers 401 inside. The air pipe 3 is vertically fitted inside the rotating pipe 4, and its bottom end is fixedly connected to the bottom of the sleeve 5. The side of the air pipe 3 has a vertically opened air hole 301, which is aligned with the spray hole 501. The sealing pipe 6 is sealed and slidably fitted on the outside of the sleeve 5, and a spring is fixedly embedded in the pipe wall. The top end of the sealing pipe 6 is fixedly connected to the bottom side of the clamping block 2. The sleeve 5 is slidably fitted on a clamping plate 7, and the clamping plate 7 is rotatably connected to the bottom end of the sealing pipe 6. The top end of the air pipe 3 is connected to the pneumatic mechanism, the top end of the rotating pipe 4 is connected to the feeding mechanism, the fixture assembly is set on the lifting mechanism and located directly below the spraying assembly, and the rotating component is set on the front side of the clamping block 2 to drive the rotating pipe 4 to rotate.

[0017] A control terminal is installed on the front of the machine body 1. The entire equipment is powered by an external power source, and the operation of the entire equipment is controlled through the control terminal.

[0018] The rotating component includes a motor 8, a first gear 9, and a second gear 10. The motor 8 is fixedly mounted on the front side of the clamping block 2. The first gear 9 is fixedly sleeved on the output shaft end of the motor 8. The second gear 10 is fixedly sleeved on the rotating tube 4 and meshes with the first gear 9.

[0019] The lifting mechanism includes a linkage assembly, two first screws 11, a support plate 12, two second screws 13, and a truss 14. A ladder 101 is fixedly installed on the upper side of the machine body 1. The two first screws 11 are vertically rotatably sleeved in the ladder 101 and are symmetrically arranged. The two second screws 13 are vertically rotatably sleeved on the upper side of the machine body 1 and are symmetrically arranged. The support plate 12 is horizontally arranged and symmetrically rotatably sleeved on the two second screws 13 on both sides. The truss 14 is horizontally arranged and symmetrically rotatably sleeved on the two first screws 11 on both sides. The locking block 2 is fixedly installed on the front side of the truss 14. The fixture assembly is vertically arranged in the support plate 12. The two first screws 11 and the two second screws 13 are driven to rotate simultaneously by the linkage assembly.

[0020] The linkage assembly includes a first motor 15, a drive shaft 16, two first worm heads 17, and four first worm wheels 18. The first motor 15 is horizontally fixedly installed on the side of the machine body 1. The drive shaft 16 is horizontally rotatably sleeved inside the machine body 1, and its end is fixedly connected to the output end of the first motor 15 through a coupling. The four first worm wheels 18 are respectively fixedly sleeved on the bottom ends of two first screws 11 and two second screws 13. The two first worm heads 17 are fixedly sleeved on the drive shaft 16 and are respectively meshed with two pairs of first worm wheels 18.

[0021] The feeding mechanism includes a material box 19, multiple conduits 20 and multiple clamps 21. The multiple clamps 21 are rotatably fitted onto the top of the multiple rotating pipes 4. The material box 19 is horizontally fixed on the upper side of the truss 14 through the connecting frame 22. The multiple conduits 20 are all vertically arranged, and their upper and lower ends are fixedly connected to the bottom output end of the material box 19 and the top of the clamps 21, respectively. The top of the air pipe 3 extends out of the conduit 20.

[0022] A solenoid valve is fixedly installed at the top of the conduit 20 to control the leakage and shut-off of sand.

[0023] The pneumatic mechanism includes an air pump device 23, a hose 24, a connecting pipe 25, and a horizontal pipe 26. The horizontal pipe 26 is horizontally fixedly installed at the top of multiple air pipes 3. The connecting pipe 25 is vertically fixedly installed on the rear side of the truss 14 through two clamps 27, and its top end is fixedly connected to the horizontal pipe 26 for conduction. The air pump device 23 is horizontally fixedly installed on the upper side of the ladder platform 101. The hose 24 is fixedly connected to the output end of the air pump device 23 and the bottom end of the connecting pipe 25 at both ends for conduction.

[0024] The fixture assembly includes a turntable 28 and three sets of clamping components. The turntable 28 is vertically rotatably mounted inside the support plate 12, and has three vertically opened holes 281 inside. The three holes 281 are evenly distributed in a ring. The three sets of clamping components are evenly arranged in a ring on the upper side of the turntable 28. A dustproof cylinder 29 is vertically fixedly installed on the bottom side of the support plate 12. A dust collection device is installed inside the bottom side of the machine body 1. The bottom end of the dustproof cylinder 29 is fixedly connected to the input end of the dust collection device. Multiple turntables 28 are connected through a drive component, and the turntables 28 rotate under the drive of the drive component.

[0025] The dust cylinder 19 is made of flexible and telescopic material, and the dust collection device is a dust collection device that can collect the metal shavings and sand that are ground off.

[0026] The drive components include a second motor 30, a main shaft 31, multiple second worm heads 32, and multiple second worm wheels 33. The second motor 30 is fixedly installed on the side of the support plate 12. The main shaft 31 is horizontally rotatably sleeved inside the support plate 12 and is fixedly connected to the output end of the second motor 30 through a coupling. Multiple second worm wheels 33 are respectively fixedly sleeved on the outside of multiple turntables 28. Multiple second worm heads 32 are all fixedly sleeved on the main shaft 31 and are respectively meshed with multiple second worm wheels 33.

[0027] The clamping components include an insert block 34, a slider 35, a third screw 36, a pressure block 37, and a bracket 38. The insert block 34 is vertically fixedly installed on the upper side of the turntable 28. The slider 35 is horizontally slidably fitted inside the insert block 34. The pressure block 37 is vertically fixedly installed on the inner end of the slider 35. The bracket 38 is horizontally fixedly installed on the outer side of the insert block 34. The outer end of the third screw 36 is horizontally rotatably fitted inside the bracket 38, and the inner end is threadedly fitted inside the slider 35. The pressure block 37 is fixedly installed on the inner end of the slider 35. The three third screws 36 are connected by a transmission component, which includes three third gears 39 and a gear ring 40. The three third gears 39 are respectively fixedly fitted onto the outer ends of the three third screws 36. The gear ring 40 is rotatably embedded on the outer side of the three brackets 38 and meshes with the three third gears 39. The outer end of the third screw 36 has a locking hole 361, which is hexagonal in shape.

[0028] When using this equipment to process and grind the inner wall of the oil pipe, place the oil pipe vertically with the bottom end of the oil pipe against the upper side of the turntable 28. Then, use a hex wrench to turn one of the third screws 36, which drives the gear ring 40 to rotate through the third gear 39. The gear ring 40 drives the other two third gears 39 to rotate, and the third gears 39 drive the corresponding third screws 36 to rotate. The third screws 36 drive the slider 35 to slide, and the slider 35 drives the pressure block 37 to move towards the outside of the oil pipe. Finally, the three pressure blocks 37 clamp the oil pipe, thus fixing the oil pipe.

[0029] After all the oil pipes are vertically fixed, the first motor 15 is started. The first motor 15 drives the transmission shaft 16 to rotate, and the transmission shaft 16 drives the two first worm heads 17 located on it to rotate. The first worm heads 17 drive the two first worm wheels 18 meshing with them to rotate, thereby driving the two first screws 11 and the two second screws 13 to rotate simultaneously. This causes the truss 14 to move the multiple sets of injection components downward, and the support plate 12 to move the multiple sets of fixture components upward, so that the oil pipes are sleeved on the outside of the casing 5. During the movement, the top of the oil pipe pushes the clamping plate 7 upward, compressing the sealing pipe 6, so that the spray holes 501 on the pipe section of the casing 5 inside the oil pipe are exposed and aligned with the inner wall of the oil pipe. The spray holes 501 located in the area above the clamping plate 7 are sealed by the sealing pipe 6, so that the effective length of the spray holes 501 automatically matches the length of the oil pipe and covers the internal height of the oil pipe. As the lifting mechanism operates, after the bottom end of the casing 5 contacts the upper side of the middle of the turntable 28, the first motor 15 stops operating.

[0030] After the injection assembly and oil pipe are aligned, the grinding operation is then carried out. The equipment is started, and the second motor 30 operates intermittently, driving the main shaft 31 to rotate. The main shaft 31 drives multiple second worm heads 32 located on it to simultaneously drive multiple second worm wheels 33 to rotate, thereby causing multiple turntables 28 to rotate synchronously. The turntables 28 drive the oil pipe to rotate through the clamping components. At the same time, the motor 8 starts, driving the second gear 10 to rotate through the first gear 9. The second gear 10 drives the rotating tube 4 to rotate, and the air pump device 23 operates, sending high-pressure gas into the air pipe 3 through the hose 24, connecting pipe 25, and horizontal pipe 26. When the solenoid valve is activated, the sand in the hopper 19 flows into the ferrule 21 through the guide tube 20. In the ferrule 21, it flows into multiple storage chambers 401 through the top of the rotating tube 4. As the rotating tube 4 rotates, when the storage chamber 401 is aligned with the air hole 301 and the nozzle 501, the high-pressure airflow pushes the sand in the aligned storage chamber 401 out to polish the inner wall of the oil pipe, thereby realizing the sandblasting operation. The multiple storage chambers 401 are aligned with the air hole 301 and the nozzle 501 in sequence to realize the periodic continuous sandblasting operation. With the rotation of the oil pipe, the inner wall of the oil pipe is fully polished.

[0031] By ensuring that the nozzle 501 is of equal length to the inner wall of the oil pipe in the vertical direction, and by coordinating with the rotation of the oil pipe, efficient grinding of the inner wall of the oil pipe can be achieved, thereby improving grinding efficiency.

[0032] During the rotation of the rotating tube 4, when the area between the two storage chambers 401 is aligned with the air hole 301 and the spray hole 501, the channel is closed and the airflow is blocked, thus allowing for the storage of energy and pressurization. After the storage chamber 401 is aligned with the air hole 301 and the spray hole 501, the abrasive material can be sprayed out more forcefully, thereby more effectively grinding the inner wall of the oil pipe and further improving the grinding efficiency. The second motor 30 operates intermittently, causing the oil pipe to rotate intermittently. Combined with the intermittent spraying of abrasive material, this makes the grinding more uniform.

[0033] After the sprayed sand impacts the inner wall of the oil pipe to complete the grinding operation, it will fall downwards and eventually be discharged through the drain hole 281 in the turntable 28. It will then be discharged into the dust collection device inside the machine body 1 through the dustproof cylinder 29. The oil pipe itself seals the sand to prevent splashing and can effectively reduce sand and dust pollution.

[0034] After the grinding operation is completed, the air pump device 23 stops running, the solenoid valve device is shut off, the first motor 15 starts to run in reverse, so that the truss 14 and the support plate 12 move away from each other. Then the locking parts are unlocked, and the ground oil pipe can be removed. Then the next set of oil pipe grinding operations can be carried out.

[0035] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sandblasting and polishing equipment for the inner wall of a tungsten alloy coated oil pipe, comprising a machine body (1), a lifting mechanism and multiple polishing mechanisms, wherein the multiple polishing mechanisms are arranged on the upper side of the machine body (1) through the lifting mechanism; characterized in that The grinding mechanism includes a jig assembly, a spray assembly, and a rotating component. The spray assembly includes a clamping block (2), an air pipe (3), a rotating pipe (4), a sleeve (5), and a sealing pipe (6). The clamping block (2) is vertically fixedly installed on the front side of the lifting mechanism. The sleeve (5) is vertically fixedly fitted inside the clamping block (2) and has a vertically opened spray hole (501). The rotating pipe (4) is vertically rotated and fitted inside the sleeve (5) and has multiple vertically opened material storage chambers (401). The air pipe (3)... The air pipe (3) is vertically sleeved inside the rotating tube (4) and its bottom end is fixedly connected to the bottom of the sleeve (5). The side of the air pipe (3) is vertically opened with an air hole (301). The air hole (301) is aligned with the spray hole (501). The sealing tube (6) is sealed and slidably sleeved on the outside of the sleeve (5). A spring is fixedly embedded in the tube wall. The top end of the sealing tube (6) is fixedly connected to the bottom side of the clamping block (2). The sleeve (5) is slidably sleeved on the clamping plate (7). The clamping plate (7) is rotatably connected to the bottom end of the sealing tube (6). The top end of the air pipe (3) is connected to the pneumatic mechanism, the top end of the rotating pipe (4) is connected to the feeding mechanism, the fixture assembly is set on the lifting mechanism and located directly below the spray assembly, and the rotating component is set on the front side of the clamping block (2) to drive the rotating pipe (4) to rotate.

2. The apparatus of claim 1, wherein the sandblasting device is configured to sandblast the inner wall of the oil pipe to a depth of 0.1 mm to 0.3 mm. The rotating component includes a motor (8), a first gear (9), and a second gear (10). The motor (8) is fixedly installed on the front side of the clamp (2). The first gear (9) is fixedly sleeved on the output shaft end of the motor (8). The second gear (10) is fixedly sleeved on the rotating tube (4) and meshes with the first gear (9).

3. The apparatus of claim 1, wherein the sandblasting device is configured to sandblast the inner wall of the oil pipe to a depth of 0.1 mm to 0.3 mm. The lifting mechanism includes a linkage assembly, two first screws (11), a support plate (12), two second screws (13), and a truss (14). A ladder (101) is fixedly installed on the upper side of the machine body (1). The two first screws (11) are vertically rotated and sleeved in the ladder (101) and are symmetrically arranged. The two second screws (13) are vertically rotated and sleeved on the upper side of the machine body (1) and are symmetrically arranged. The support plate (12) is horizontally arranged and symmetrically rotated and sleeved on the two second screws (13) on both sides. The truss (14) is horizontally arranged and symmetrically rotated and sleeved on the two first screws (11) on both sides. The locking block (2) is fixedly installed on the front side of the truss (14). The fixture assembly is vertically arranged in the support plate (12). The two first screws (11) and the two second screws (13) are driven to rotate simultaneously by the linkage assembly.

4. The sandblasting and grinding equipment for the inner wall of tungsten alloy coated oil pipes as described in claim 3, characterized in that, The feeding mechanism includes a material box (19), multiple conduits (20) and multiple sleeves (21). The multiple sleeves (21) are rotatably fitted onto the top of the multiple rotating pipes (4). The material box (19) is horizontally fixed on the upper side of the truss (14) by a connecting frame (22). The multiple conduits (20) are all vertically arranged, and their upper and lower ends are fixedly connected to the bottom output end of the material box (19) and the top of the sleeves (21) respectively. The top of the air pipe (3) extends out of the conduit (20).

5. The sandblasting and grinding equipment for the inner wall of tungsten alloy coated oil pipes as described in claim 4, characterized in that, The pneumatic mechanism includes an air pump device (23), a hose (24), a connecting pipe (25), and a horizontal pipe (26). The horizontal pipe (26) is horizontally fixedly installed at the top of multiple air pipes (3). The connecting pipe (25) is vertically fixedly installed on the rear side of the truss (14) through two clamps (27), and its top end is fixedly connected to the horizontal pipe (26). The air pump device (23) is horizontally fixedly installed on the upper side of the ladder platform (101). The hose (24) is fixedly connected at both ends to the output end of the air pump device (23) and the bottom end of the connecting pipe (25), respectively.

6. The sandblasting and grinding equipment for the inner wall of tungsten alloy coated oil pipes as described in claim 3, characterized in that, The fixture assembly includes a turntable (28) and three sets of clamping components. The turntable (28) is vertically rotatably installed inside the support plate (12) and has three vertically opened holes (281) inside. The three holes (281) are evenly distributed in a ring. The three sets of clamping components are evenly arranged in a ring on the upper side of the turntable (28). A dustproof cylinder (29) is vertically fixedly installed on the bottom side of the support plate (12). A dust collection device is provided inside the bottom side of the machine body (1). The bottom end of the dustproof cylinder (29) is fixedly connected to the input end of the dust collection device. Multiple turntables (28) are connected through a driving component. The turntables (28) rotate under the drive of the driving component.

7. The sandblasting and grinding equipment for the inner wall of tungsten alloy coated oil pipes as described in claim 6, characterized in that, The clamping components include an insert block (34), a slider (35), a third screw (36), a pressure block (37), and a mounting bracket (38). The insert block (34) is vertically fixedly installed on the upper side of the turntable (28). The slider (35) is horizontally slidably fitted inside the insert block (34). The pressure block (37) is vertically fixedly installed on the inner end of the slider (35). The mounting bracket (38) is horizontally fixedly installed on the outer side of the insert block (34). The outer end of the third screw (36) is horizontally rotated and fitted inside the mounting bracket (38), while its inner end is threaded onto the slider (35). Inside, the pressure block (37) is fixedly installed at the inner end of the slider (35). The three third screws (36) are connected by a transmission component. The transmission component includes three third gears (39) and a gear ring (40). The three third gears (39) are respectively fixedly sleeved on the outer ends of the three third screws (36). The gear ring (40) is rotatably embedded on the outer side of the three inserts (38) and meshes with the three third gears (39). The outer end of the third screw (36) is provided with a locking hole (361). The locking hole (361) is hexagonal in shape.

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