Special-shaped steel pipe polishing device

Abstract

The invention discloses a special-shaped steel pipe polishing device and relates to the technical field of steel pipe grinding, the special-shaped steel pipe polishing device comprises an outer grinding mechanism, an inner grinding mechanism, a fixing mechanism and a displacement mechanism, the outer grinding mechanism comprises a supporting shell, an upper grinding roller and a lower grinding roller are horizontally installed in the supporting shell, and the fixing mechanism comprises an upper supporting disc and a lower supporting disc; a first supporting frame and a second supporting frame are mounted at the top of the upper supporting disc, a positioning platform is mounted at the top of the first supporting frame, and a limiting platform is mounted at the top of the second supporting frame; the inner grinding mechanism comprises a fixed shell and a grinding rod, a first motor is mounted at the top of the fixed shell, the grinding rod comprises a grinding head, a rod body and a driving table, and the first motor is connected with the driving table through a belt; the displacement mechanism is used for driving the upper supporting disc to move. Therefore, the outer wall of the special-shaped steel pipe is ground through the upper grinding roller and the lower grinding roller, the inner wall of the special-shaped steel pipe is ground through the grinding rod, and the problem that in the prior art, due to step-by-step grinding of the special-shaped steel pipe, the labor cost is high is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe grinding, and particularly relates to a polishing device for special-shaped steel pipes. Background Art

[0002] Special-shaped steel pipes refer to the general term for seamless steel pipes with cross-sectional shapes other than circular pipes. According to the different sizes of the cross-sectional shapes of the steel pipes, they can be further divided into special-shaped seamless steel pipes with equal wall thickness, special-shaped seamless steel pipes with unequal wall thickness, and special-shaped seamless steel pipes with variable diameters.

[0003] After the production of special-shaped steel pipes, they often pile up in one place. If the moisture in the air is relatively high, the piled-up special-shaped steel pipes are extremely prone to rust problems. In order to ensure the normal subsequent use of special-shaped steel pipes, we need to polish and grind the special-shaped steel pipes before use.

[0004] The existing polishing and grinding equipment has a single function and often only processes the outer wall of special-shaped steel pipes. However, there will also be problems such as rust and stains on the inner wall of special-shaped steel pipes. At this time, it is necessary to separately polish the inner wall of special-shaped steel pipes. This leads to a cumbersome process and low efficiency in the entire polishing process. Summary of the Invention

[0005] Aiming at the above defects, the purpose of the present invention is to provide a polishing device for special-shaped steel pipes, aiming to solve the problem of the cumbersome steps of grinding and polishing special-shaped steel pipes in the prior art.

[0006] To solve the above technical problems, the technical solution of the present invention is as follows: A polishing device for special-shaped steel pipes includes an outer grinding mechanism, an inner grinding mechanism, a fixing mechanism, and a displacement mechanism. The outer grinding mechanism includes a support housing, in which an upper grinding roller and a lower grinding roller are horizontally installed. The upper grinding roller and the lower grinding roller are parallel. The fixing mechanism includes an upper support plate and a lower support plate. At the top of the upper support plate, a first support frame and a second support frame are installed. The support housing is located between the first support frame and the second support frame. At the top of the first support frame, a positioning platform is installed. At one end of the positioning platform facing the second support frame, there are several special-shaped pins. At the top of the second support frame, a limiting platform is installed. At one end of the limiting platform facing the first support frame, there are several limiting pins that match the special-shaped pins. The inner grinding mechanism includes a fixing housing and a grinding rod. At the top of the fixing housing, a first motor is installed. The limiting pins are hollow. The grinding rod includes a grinding head, a rod body, and a driving platform. The grinding head is located at one end of the limiting pin facing the special-shaped pin. The driving platform is located inside the fixing housing. One end of the rod body is connected to the grinding head, and the other end of the rod body is connected to the driving platform. The first motor is connected to the driving platform by a belt. The displacement mechanism is used to drive the upper support plate to move.

[0007] Among them, a number of polishing brushes are installed on the outer wall of the polishing head, and the number of the polishing brushes is arranged around the polishing head.

[0008] Among them, a liquid spraying head is arranged at one end of the polishing head far away from the driving platform. One end of the liquid spraying head facing the driving platform is rotationally connected to the polishing head. The liquid spraying head includes a liquid delivery cavity and a number of liquid delivery channels. One end of the liquid delivery channel is connected to the liquid delivery cavity, and the other end of the liquid delivery channel is connected to the outer wall of the liquid spraying head; the polishing head includes a first channel, the rod body includes a second channel, and the driving platform includes a third channel. One end of the first channel is connected to the liquid delivery cavity, the other end of the first channel is connected to the second channel, one end of the second channel far away from the first channel is connected to the third channel, a liquid inlet pipe is rotationally connected to one end of the third channel far away from the second channel, and a liquid supply tank is connected to one end of the liquid inlet pipe far away from the third channel.

[0009] Among them, a number of driving wheels are arranged on the outer wall of the driving platform. The power end of the first motor is connected to the driving wheel by a belt, and the driving wheels between adjacent driving platforms are connected by a pulley.

[0010] Among them, a fixed ring body is further arranged on the outer wall of the driving platform. The top of the fixed ring body is connected to the top of the fixed shell. The driving platform is rotationally connected to the fixed ring body. The fixed ring body includes an inner ring body and an outer ring body. A number of power balls are arranged between the outer ring body and the inner ring body. Part of the area of the power ball is in close contact with the driving platform, and the top of the outer ring body is connected to the fixed shell.

[0011] Among them, a number of guiding columns are arranged inside the positioning platform. The guiding columns are hollow. One end of the special-shaped plug far away from the polishing head is threadedly connected to the guiding column. A drainage channel is arranged inside the special-shaped plug, and the drainage channel is communicated with the guiding column; one end of the guiding column far away from the special-shaped plug is rotationally connected to a connector, one end of the connector far away from the guiding column is connected to a collecting pipeline, a liquid outlet pipe is connected to the side wall of the collecting pipeline, and a recovery box is connected to one end of the liquid outlet pipe far away from the collecting pipeline.

[0012] Among them, a third motor is suspended at the bottom of the positioning platform. A number of power wheels are installed on the outer wall of the guiding column. The special-shaped plug is rotationally connected to the positioning platform. The third motor is connected to the power wheel by a belt, and the power wheels between adjacent guiding columns are connected by a belt.

[0013] Among them, one end of the upper grinding roller is connected to a driving assembly, and the other end of the upper grinding roller is provided with a buffer assembly, the driving assembly includes a first shell and a second shell, the second shell is located inside the first shell, a fourth motor is installed in the second shell, the power end of the fourth motor is connected to the end of the upper grinding roller away from the buffer assembly, a buffer spring is provided between the first shell and the second shell, and a first buffer port is provided at the end of the first shell facing the upper grinding roller; the buffer assembly includes a third shell, a buffer table is installed in the third shell, and a second buffer port is provided at the end of the third shell facing the upper grinding roller, the buffer table is rotatably connected to the end of the upper grinding roller away from the fourth motor, and a limit spring is installed between the top of the buffer table and the third shell; the structure of the lower grinding roller is the same as that of the upper grinding roller. The fourth motor is used to drive the upper grinding roller to rotate.

[0014] Among them, the fifth motor and the sixth motor are installed on the top of the support shell, and the power ends of the fifth motor and the sixth motor are connected to a power screw, and the power screw includes a forward thread segment and a reverse thread segment. The first shell of the upper grinding roller is threadedly connected to the forward thread segment, and the first shell of the lower grinding roller is threadedly connected to the reverse thread segment; the third shell of the upper grinding roller is threadedly connected to the forward thread segment, and the third shell of the lower grinding roller is threadedly connected to the reverse thread segment.

[0015] Among them, the displacement mechanism includes a second motor and a driving screw, the second motor is located at the top of the lower support plate, one end of the driving screw is connected to the second motor power, the other end of the driving screw is rotatably connected to the fixed shell, the upper support plate is threadedly connected to the driving screw, and the bottom of the upper support plate is slidably connected to the top of the lower support plate.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are: First, the outer wall of the special-shaped steel pipe is fully polished by the upper grinding roller and the lower grinding roller, and at the same time, the inner wall of the special-shaped steel pipe is fully polished by the grinding rod, so that the inner and outer walls of the special-shaped steel pipe are polished at the same time, which solves the problem of high labor cost and complicated steps caused by the step-by-step grinding of the inner and outer walls of the existing special-shaped steel pipe. Second, a spray head is installed at one end of the grinding rod, and the spray head can spray high-speed and high-pressure grinding and milling fluid, and the inner wall of the special-shaped steel pipe is fully polished by the grinding and milling fluid. At the same time, the grinding and milling fluid can also take away the heat generated by the grinding of the special-shaped steel pipe during the flow process, avoiding the deformation of the special-shaped steel pipe due to local high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a special-shaped steel pipe polishing device; Figure 2 It is the structural diagram of the external grinding mechanism; Figure 3Structural diagram of the first support frame; Figure 4 Structural diagram of the second support frame; Figure 5 Structural diagram of the internal grinding mechanism; Figure 6 Structural diagram of the grinding rod; Figure 7 Cross-sectional view of the grinding rod; Figure 8 Top view of the driving platform; Figure 9 Structural diagram of the fixed ring body; Figure 10 Cross-sectional view of the positioning platform; Figure 11 Structural diagram of the guiding column; Figure 12 Structural diagram of the special-shaped pin; Figure 13 Cross-sectional view of the special-shaped pin; Figure 14 Structural diagram of the limit pin; Figure 15 For Figure 2 Partial enlarged view of a in; Figure 16 For Figure 2 Partial enlarged view of b in.

[0018] In the figure: 1 - external grinding mechanism, 11 - support housing, 12 - upper grinding roller, 13 - lower grinding roller, 14 - driving assembly, 141 - first housing, 142 - second housing, 143 - fourth motor, 144 - buffer spring, 145 - first buffer port, 15 - buffer assembly, 151 - third housing, 152 - buffer table, 153 - second buffer port, 154 - limit spring, 16 - fifth motor, 17 - sixth motor, 18 - power lead screw, 181 - right-handed thread section, 182 - left-handed thread section; 2 - internal grinding mechanism, 21 - fixed housing, 22 - grinding rod, 221 - grinding head, 222 - rod body, 223 - driving platform, 224 - grinding brush, 225 - liquid spraying head, 226 - liquid supply cavity, 227 - liquid supply channel, 228 - first channel, 229 - second channel, 230 - third channel, 23 - first motor, 24 - liquid supply tank, 241 - liquid inlet pipe, 25 - driving wheel, 26 - fixed ring body, 261 - inner ring body, 262 - outer ring body, 263 - power ball; 3 - Fixing mechanism, 31 - Upper support disk, 32 - Lower support disk, 33 - First support frame, 331 - Positioning platform, 332 - Special-shaped pin, 333 - Drainage channel, 334 - Connection section, 335 - Positioning section, 336 - Positioning plate, 337 - Sealing ring, 34 - Second support frame, 341 - Limiting platform, 342 - Limiting pin, 343 - Connection ring, 344 - Inner disk body, 345 - Limiting plate, 346 - Limiting hole, 347 - Limiting protrusion, 348 - Limiting channel, 349 - Ball, 35 - Guide post, 351 - Adapter, 352 - Converging pipeline, 353 - Liquid outlet pipeline, 354 - Recycling box, 36 - Third motor, 361 - Driving wheel; 4 - Displacement mechanism, 41 - Second motor, 42 - Driving lead screw, 43 - Fixed disk, 44 - Chute, 45 - Seventh motor, 46 - Rotating lead screw. Specific implementation mode

[0019] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] Embodiment 1: As Figures 1-16 shown, a special-shaped steel pipe polishing device includes an external grinding mechanism 1, an internal grinding mechanism 2, a fixing mechanism 3 and a displacement mechanism 4. The external grinding mechanism 1 includes a support housing 11, and an upper grinding roller 12 and a lower grinding roller 13 are horizontally installed in the support housing 11, and the upper grinding roller 12 and the lower grinding roller 13 are parallel.

[0021] In this solution, the special-shaped steel pipe is placed on the fixing mechanism 3. The external grinding mechanism 1 is used to grind and polish the outer wall of the special-shaped steel pipe, and the internal grinding mechanism 2 is used to grind and polish the inner wall of the special-shaped steel pipe. In order to facilitate grinding the outer walls of multiple special-shaped steel pipes at the same time, the roller grinding method is adopted in this solution. For this reason, the external grinding mechanism 1 includes an upper grinding roller 12 and a lower grinding roller 13, and the upper grinding roller 12 and the lower grinding roller 13 respectively grind the upper and lower sides of the special-shaped steel pipe to ensure that the outer wall of the special-shaped steel pipe is fully ground.

[0022] In order to facilitate the fixation of the special-shaped steel pipe between the upper grinding roller 12 and the lower grinding roller 13, the fixing mechanism 3 includes an upper support plate 31 and a lower support plate 32. A first support frame 33 and a second support frame 34 are installed on the top of the upper support plate 31. The support housing 11 is located between the first support frame 33 and the second support frame 34. A positioning platform 331 is installed on the top of the first support frame 33. A number of special-shaped pins 332 are arranged at one end of the positioning platform 331 facing the second support frame 34. A limiting platform 341 is installed on the top of the second support frame 34. A number of limiting pins 342 matching the special-shaped pins 332 are arranged at one end of the limiting platform 341 facing the first support frame 33. In this solution, the outer shapes of the special-shaped pins 332 and the limiting pins 342 match the inner cavity of the special-shaped steel pipe. When in use, part of the special-shaped pins 332 and the limiting pins 342 are located inside the special-shaped steel pipe, and the functions of the first support frame 33 and the second support frame 34 are to lift the special-shaped steel pipe to a certain height.

[0023] In order to facilitate the matching of special-shaped steel pipes of different shapes, the special-shaped pins 332 and the limiting pins 342 can be replaced with corresponding shapes according to needs.

[0024] As Figure 5 shown, in order to facilitate the grinding of the inner wall of the special-shaped steel pipe, the inner grinding mechanism 2 includes a fixed housing 21 and a grinding rod 22. A first motor 23 is installed on the top of the fixed housing 21. The limiting pin 342 is provided with a hollow interior. The grinding rod 22 includes a grinding head 221, a rod body 222, and a driving platform 223. The grinding head 221 is located at one end of the limiting pin 342 facing the special-shaped pin 332. The driving platform 223 is located inside the fixed housing 21. One end of the rod body 222 is connected to the grinding head 221, and the other end of the rod body 222 is connected to the driving platform 223. The first motor 23 is connected to the driving platform 223 by a belt. The fixed housing 21 is used to support the grinding rod 22. In the initial state, the limiting pin 342 and the special-shaped pin 332 clamp and fix the special-shaped steel pipe. Among them, one end of the limiting pin 342 is located inside the cavity of the special-shaped steel pipe, and the grinding head 221 is also located inside the special-shaped steel pipe.

[0025] As Figure 6 shown, the grinding rod 22 includes a grinding head 221, a rod body 222, and a driving platform 223. The grinding head 221 is located at one end of the limiting pin 342 facing the special-shaped pin 332. In order to facilitate the movement of the grinding head 221 towards the other end of the special-shaped steel pipe, the limiting pin 342 is provided with a hollow interior to facilitate the rod body 222 to pass through the limiting pin 342 and communicate with the grinding head 221. Driven by the first motor 23, the driving platform 223, the rod body 222, and the grinding head 221 rotate at high speed. Among them, the grinding head 221 contacts the inner wall of the special-shaped steel pipe. At this time, the high-speed rotating grinding head 221 completes the grinding and polishing process of the inner wall of the special-shaped steel pipe.

[0026] When the special-shaped steel pipe is stationary, the outer grinding mechanism 1 and the inner grinding mechanism 2 can only grind part of the area of the special-shaped steel pipe. In order to facilitate the grinding and polishing of each area of the special-shaped steel pipe, the displacement mechanism 4 includes a second motor 41 and a driving lead screw 42. The second motor 41 is located at the top of the lower support plate 32. One end of the driving lead screw 42 is power-connected to the second motor 41, and the other end of the driving lead screw 42 is rotatably connected to the fixed housing 21. The upper support plate 31 is threadedly connected to the driving lead screw 42, and the bottom of the upper support plate 31 is slidably connected to the top of the lower support plate 32. The second motor 41 drives the driving lead screw 42 to rotate. Since the bottom of the upper support plate 31 is threadedly connected to the driving lead screw 42 and the upper support plate 31 is slidably connected to the lower support plate 32, when the driving lead screw 42 rotates, it will drive the upper support plate 31 to slide reciprocally on the top of the lower support plate 32. Therefore, the special-shaped steel pipe can move towards the direction of the fixed housing 21. During the horizontal movement of the special-shaped steel pipe, the upper grinding roller 12 and the lower grinding roller 13 will grind the upper and lower sides of the special-shaped steel pipe, and the grinding head 221 and the rod body 222 will extend into the special-shaped steel pipe along with the movement of the special-shaped steel pipe, thereby completing the grinding of the inner wall of the special-shaped steel pipe.

[0027] As Figures 5-7 shown, if the grinding head 221 is rigid, it will be difficult for the grinding head 221 to closely adhere to the inner wall of the special-shaped steel pipe, which will result in a poor grinding effect. For this reason, a number of grinding brushes 224 are installed on the outer wall of the grinding head 221, and the number of the grinding brushes 224 is arranged around the grinding head 221. The grinding brushes 224 are of a detachable design, and the height of the grinding brushes 224 in this solution is greater than the aperture of the special-shaped steel pipe. This design ensures that the grinding brushes 224 can contact each area of the inner wall of the special-shaped steel pipe.

[0028] Since the inner wall and the outer wall of the special-shaped steel pipe are polished at the same time, the special-shaped steel pipe is prone to local overheating during the polishing process. To this end, a liquid spray head 225 is provided at one end of the polishing head 221 away from the driving platform 223. The liquid spray head 225 is rotatably connected to the polishing head 221 at one end facing the driving platform 223. The liquid spray head 225 includes a liquid delivery chamber 226 and a plurality of liquid delivery channels 227. One end of the liquid delivery channel 227 is connected to the liquid delivery chamber 226, and the other end of the liquid delivery channel 227 is connected to the outer wall of the liquid spray head 225. The polishing head 221 includes a first channel 228, and the rod body 222 includes a second channel 229. Two channels 229, the driving platform 223 includes a third channel 230, one end of the first channel 228 is connected to the liquid delivery chamber 226, the other end of the first channel 228 is connected to the second channel 229, the end of the second channel 229 away from the first channel 228 is connected to the third channel 230, the end of the third channel 230 away from the second channel 229 is rotatably connected to the liquid inlet pipe 241, and the end of the liquid inlet pipe 241 away from the third channel 230 is connected to the liquid supply box 24.

[0029] In the present embodiment, a high-pressure pump (not shown in the figure) is arranged in the liquid supply box 24, and the high-pressure pump is connected to the liquid inlet pipe 241, and the liquid inlet pipe 241 is connected to the third channel 230. At this time, the high-pressure pump delivers the liquid stored in the liquid supply box 24 to the third channel 230, and then the high-speed flowing liquid reaches the liquid delivery chamber 226 of the liquid spray head 225 through the second channel 229 and the first channel 228, and then the high-speed and high-pressure liquid is sprayed out through the liquid delivery channel 227 to flush and cool the inner wall of the special-shaped steel pipe.

[0030] Preferably, the liquid supply box 24 contains a milling liquid, which is a mixture of water and diamond powder. The purpose of this design is to use high-speed and high-pressure milling liquid to impact the inner wall of the special-shaped steel pipe. Since the liquid spray head 225 rotates with the grinding head 221, the milling liquid can flush the inner wall of the special-shaped steel pipe 360 degrees, and use the diamond powder to remove the burrs, protrusions and stains on the inner wall of the special-shaped steel pipe. Then the grinding brush 224 performs a secondary grinding on the inner wall, which fully ensures the grinding quality of the inner wall. At the same time, the milling liquid takes away the heat generated by the grinding of the special-shaped steel pipe during the flow process, avoiding the problem of local deformation of some areas of the special-shaped steel pipe caused by high temperature during grinding.

[0031] like Figure 8 As shown, in order to facilitate the first motor 23 to drive the driving platform 223 to rotate, a plurality of driving wheels 25 are arranged on the outer wall of the driving platform 223, the power end of the first motor 23 is connected to the driving wheel 25 by a belt, and the driving wheels 25 between adjacent driving platforms 223 are connected by a pulley. This design drives a plurality of driving platforms 223 to rotate together through a first motor 23, thereby ensuring that multiple special-shaped steel pipes can be polished.

[0032] As Figure 9 shown, in order to facilitate the hoisting of the driving platform 223 onto the top of the fixed housing 21, a fixed ring body 26 is further provided on the outer wall of the driving platform 223. The top of the fixed ring body 26 is connected to the top of the fixed housing 21, and the driving platform 223 is rotatably connected to the fixed ring body 26. In order to reduce the friction force received when the driving platform 223 rotates, the fixed ring body 26 includes an inner ring body 261 and an outer ring body 262. A number of power balls 263 are provided between the outer ring body 262 and the inner ring body 261. Part of the area of the power balls 263 is in close contact with the driving platform 223, and the top of the outer ring body 262 is connected to the fixed housing 21.

[0033] As Figures 10-13 shown, in order to facilitate the extraction of the milling fluid inside the special-shaped steel pipe and facilitate the subsequent entry of the milling fluid into the special-shaped steel pipe, a number of guiding columns 35 are provided inside the positioning platform 331. The guiding columns 35 are hollow. One end of the special-shaped pin 332 away from the grinding head 221 is threadedly connected to the guiding column 35. A drainage channel 333 is provided inside the special-shaped pin 332, and the drainage channel 333 is communicated with the guiding column 35. One end of the guiding column 35 away from the special-shaped pin 332 is rotatably connected to a connector 351. One end of the connector 351 away from the guiding column 35 is connected to a manifold pipe 352. A liquid outlet pipe is connected to the side wall of the manifold pipe 352, and one end of the liquid outlet pipe away from the manifold pipe 352 is connected to a recovery tank 354. The milling fluid sprayed from the liquid spray head 225 moves towards the special-shaped pin 332 as the grinding rod 22 advances. Subsequently, the milling fluid passes through the drainage channel 333 and moves towards the inside of the guiding column 35, and then reaches the manifold pipe 352. The milling fluid in multiple special-shaped steel pipes converges in the manifold pipe 352, and then reaches the recovery tank 354 through the liquid outlet pipe 353.

[0034] In order to ensure that all areas on the outer wall of the special-shaped steel pipe can be polished, we need to rotate the special-shaped steel pipe. For this purpose, a third motor 36 is hoisted at the bottom of the positioning platform 331. A number of power wheels 361 are installed on the outer wall of the guiding column 35. The special-shaped pin 332 is rotatably connected to the positioning platform 331. The third motor 36 is connected to the power wheels 361 by a belt, and the power wheels 361 between adjacent guiding columns 35 are connected by a belt. The third motor 36 drives the guiding column 35 to rotate. Since the guiding column 35 is threadedly connected to the special-shaped pin 332 and the special-shaped pin 332 is clamped to one end of the special-shaped steel pipe, the third motor 36 will drive the special-shaped steel pipe to rotate. Also, since multiple guiding columns 35 are connected by a belt, the third motor 36 will drive multiple special-shaped steel pipes to rotate synchronously, so as to ensure that each special-shaped steel pipe can be fully polished.

[0035] Preferably, the special-shaped plug 332 includes a connecting section 334 and a positioning section 335. An external thread is provided on the outer wall of the connecting section 334, and a positioning plate 336 and a sealing ring 337 are provided on the outer wall of the positioning section 335. The positioning plate 336 is used to prevent the positioning section 335 from extending excessively into the special-shaped steel pipe, and the sealing ring 337 is used to prevent the milling fluid in the special-shaped steel pipe from leaking out through the gap.

[0036] As Figure 14 shown, preferably, the limit plug 342 includes a connecting ring 343 and an inner disc body 344. A limit plate 345 is provided on the side wall of the connecting ring 343, and a limit hole 346 is opened in the limit plate 345. A number of rolling balls 349 are provided between the connecting ring 343 body and the inner disc body 344. A limit projection 347 is provided at one end of the inner disc body 344 facing the positioning platform 331. The limit projection 347 includes a limit channel 348, and the limit channel 348 is arranged around the rod body 222. The grinding head 221 is located at one end of the limit projection 347 away from the inner disc body 344. The limit plug 342 is bolted to the limit platform 341 through the limit plate 345. The function of the limit projection 347 is to extend into the special-shaped steel pipe and be clamped with the special-shaped steel pipe, and the rod body 222 passes through the limit channel 348 and enters the inside of the special-shaped steel pipe.

[0037] The purpose of setting the limit projection 347 as square in the figure is to fix the square steel pipe, and the staff can select the shape of the limit projection 347 according to needs.

[0038] As Figure 2 、 Figure 15 、 Figure 16As shown in the figure, in order to facilitate the rotation of the upper grinding roller 12 and the lower grinding roller 13, one end of the upper grinding roller 12 is connected with a driving assembly 14, and a buffer assembly 15 is arranged at the other end of the upper grinding roller 12. The driving assembly 14 includes a first housing 141 and a second housing 142. The second housing 142 is located inside the first housing 141. A fourth motor 143 is installed in the second housing 142. The power end of the fourth motor 143 is connected with one end of the upper grinding roller 12 away from the buffer assembly 15. A buffer spring 144 is arranged between the first housing 141 and the second housing 142. One end of the first housing 141 facing the upper grinding roller 12 is provided with a first buffer port 145. The buffer assembly 15 includes a third housing 151. A buffer table 152 is installed in the third housing 151. One end of the third housing 151 facing the upper grinding roller 12 is provided with a second buffer port 153. The buffer table 152 is rotatably connected with one end of the upper grinding roller 12 away from the fourth motor 143. A limiting spring 154 is installed between the top of the buffer table 152 and the third housing 151. The structure of the lower grinding roller 13 is the same as that of the upper grinding roller 12. The fourth motor 143 is used to drive the upper grinding roller 12 to rotate. Since the outer shapes of special-shaped steel pipes are different, in order to ensure that they can rotate between the upper grinding roller 12 and the lower grinding roller 13, it is necessary to ensure that the distance between the upper grinding roller 12 and the lower grinding roller 13 can be slightly changed according to the outer diameter of the special-shaped steel pipe. Therefore, the buffer spring 144 and the limiting spring 154 are introduced in this scheme. Taking an oval steel pipe as an example, when it rotates, it will push the upper grinding roller 12 and the lower grinding roller 13 to squeeze the buffer spring 144 and the limiting spring 154, which makes the distance between the two change, so as to fully grind the side of the oval steel pipe.

[0039] In order to facilitate the control of the distance between the upper grinding roller 12 and the lower grinding roller 13 to facilitate the grinding of special-shaped steel pipes with different sizes and shapes, a fifth motor 16 and a sixth motor 17 are installed on the top of the support housing 11. The power ends of the fifth motor 16 and the sixth motor 17 are both connected with a power lead screw 18. The power lead screw 18 includes a forward thread section 181 and a reverse thread section 182. The first housing 141 of the upper grinding roller 12 is threadedly connected with the forward thread section 181, and the first housing 141 of the lower grinding roller 13 is threadedly connected with the reverse thread section 182. The third housing 151 of the upper grinding roller 12 is threadedly connected with the forward thread section 181, and the third housing 151 of the lower grinding roller 13 is threadedly connected with the reverse thread section 182. This design enables the upper grinding roller 12 and the lower grinding roller 13 to move synchronously when the fifth motor 16 and the sixth motor 17 are working, facilitating our control of the distance between the two grinding rollers.

[0040] As Figure 3As shown, in order to facilitate the installation of special-shaped steel pipes, a fixed plate 43 is installed on the top of the upper support plate 31, and the fixed plate 43 includes a slide groove 44. The end of the fixed plate 43 away from the support shell 11 is installed with a seventh motor 45, and a rotating screw 46 is installed in the slide groove 44. One end of the rotating screw 46 is connected to the seventh motor 45 by power, and the other end of the rotating screw 46 is connected to the inner wall of the slide groove 44 by rotation. The first support frame 33 is slidably arranged in the slide groove 44, and the first support frame 33 is threadedly connected with the rotating screw 46. The seventh motor 45 drives the rotating screw 46 to rotate, and the rotating screw 46 drives the fixed plate 43 to move toward or away from the second support frame 34 when rotating, that is, the seventh motor 45 can adjust the distance between the first support frame 33 and the second support frame 34, thereby facilitating the placement and removal of the special-shaped steel pipe.

[0041] In order to facilitate the movement of the fixing plate 43 , the liquid outlet pipe 353 has a sufficiently long margin, and the liquid outlet pipe 353 has a certain elasticity.

[0042] In summary, the advantages of this solution are as follows: First, the outer wall of the special-shaped steel pipe is fully polished by the upper grinding roller 12 and the lower grinding roller 13, and at the same time, the inner wall of the special-shaped steel pipe is fully polished by the grinding rod 22, so that the inner and outer walls of the special-shaped steel pipe are polished at the same time, which solves the problem of high labor costs and complicated steps caused by the step-by-step grinding of the inner and outer walls of the existing special-shaped steel pipe. Second, a liquid spray head 225 is installed at one end of the grinding rod 22, and the liquid spray head 225 can spray high-speed and high-pressure milling fluid, and the inner wall of the special-shaped steel pipe is fully polished by the milling fluid. At the same time, the milling fluid can also take away the heat generated by the grinding of the special-shaped steel pipe during the flow process, avoiding the deformation of the special-shaped steel pipe due to local high temperature.

[0043] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. A special-shaped steel pipe polishing device, comprising an external grinding mechanism (1), an internal grinding mechanism (2), a fixing mechanism (3) and a displacement mechanism (4). The external grinding mechanism (1) includes a support housing (11), and an upper grinding roller (12) and a lower grinding roller (13) are horizontally installed in the support housing (11). The upper grinding roller (12) and the lower grinding roller (13) are parallel. It is characterized in that: The fixing mechanism (3) includes an upper support disc (31) and a lower support disc (32). A first support frame (33) and a second support frame (34) are installed on the top of the upper support disc (31). The support housing (11) is located between the first support frame (33) and the second support frame (34). A positioning platform (331) is installed on the top of the first support frame (33). A number of special-shaped pins (332) are arranged at one end of the positioning platform (331) facing the second support frame (34). A limit platform (341) is installed on the top of the second support frame (34). A number of limit pins (342) matching the special-shaped pins (332) are arranged at one end of the limit platform (341) facing the first support frame (33). The internal grinding mechanism (2) includes a fixed housing (21) and a grinding rod (22). A first motor (23) is installed on the top of the fixed housing (21). The limit pin (342) is hollow. The grinding rod (22) includes a grinding head (221), a rod body (222) and a driving platform (223). The grinding head (221) is located at one end of the limit pin (342) facing the special-shaped pin (332). The driving platform (223) is located inside the fixed housing (21). One end of the rod body (222) is connected to the grinding head (221), and the other end of the rod body (222) is connected to the driving platform (223). The first motor (23) is connected to the driving platform (223) by a belt. The displacement mechanism (4) is used to drive the upper support disc (31) to move.

2. The special-shaped steel pipe polishing device according to claim 1, characterized in that: A number of grinding brushes (224) are installed on the outer wall of the grinding head (221), and the number of grinding brushes (224) is arranged around the grinding head (221).

3. The special-shaped steel pipe polishing device according to claim 2, characterized in that: A liquid spraying head (225) is arranged at one end of the grinding head (221) away from the driving platform (223). One end of the liquid spraying head (225) facing the driving platform (223) is rotatably connected to the grinding head (221). The liquid spraying head (225) includes a liquid delivery cavity (226) and a number of liquid delivery channels (227). One end of the liquid delivery channel (227) is connected to the liquid delivery cavity (226), and the other end of the liquid delivery channel (227) is connected to the outer wall of the liquid spraying head (225). The grinding head (221) includes a first channel (228), the rod body (222) includes a second channel (229), and the driving platform (223) includes a third channel (230). One end of the first channel (228) is connected to the liquid delivery cavity (226), the other end of the first channel (228) is connected to the second channel (229), one end of the second channel (229) away from the first channel (228) is connected to the third channel (230), and a liquid inlet pipe (241) is rotatably connected to one end of the third channel (230) away from the second channel (229). One end of the liquid inlet pipe (241) away from the third channel (230) is connected to a liquid supply tank (24).

4. An abnormal-shaped steel pipe polishing device according to claim 1, characterized in that: A plurality of drive wheels (25) are provided on the outer wall of the drive table (223). The power end of the first motor (23) is connected to the drive wheels (25) by a belt. The drive wheels (25) between adjacent drive tables (223) are connected by a pulley.

5. The special-shaped steel pipe polishing device according to claim 4, characterized in that: A fixing ring body (26) is further provided on the outer wall of the drive table (223). The top of the fixing ring body (26) is connected to the top of the fixing housing (21). The drive table (223) is rotatably connected to the fixing ring body (26). The fixing ring body (26) includes an inner ring body (261) and an outer ring body (262). A plurality of power balls (263) are provided between the outer ring body (262) and the inner ring body (261). A part of the power balls (263) is in close contact with the drive table (223). The top of the outer ring body (262) is connected to the fixing housing (21).

6. The special-shaped steel pipe polishing device according to claim 1, wherein: A plurality of guiding columns (35) are provided inside the positioning platform (331). The guiding columns (35) are hollow. One end of the special-shaped plug (332) far from the grinding head (221) is threadedly connected to the guiding column (35). A drainage channel (333) is provided inside the special-shaped plug (332). The drainage channel (333) is communicated with the guiding column (35). One end of the guiding column (35) far from the special-shaped plug (332) is rotatably connected to a swivel joint (351). One end of the swivel joint (351) far from the guiding column (35) is connected to a manifold pipe (352). A liquid outlet pipe is connected to the side wall of the manifold pipe (352). One end of the liquid outlet pipe far from the manifold pipe (352) is connected to a recovery tank (354).

7. An abnormal-shaped steel pipe polishing device according to claim 6, characterized in that: A third motor (36) is suspended at the bottom of the positioning platform (331). A plurality of power wheels (361) are installed on the outer wall of the guiding column (35). The special-shaped plug (332) is rotatably connected to the positioning platform (331). The third motor (36) is connected to the power wheels (361) by a belt. The power wheels (361) between adjacent guiding columns (35) are connected by a belt.

8. The special-shaped steel pipe polishing device according to claim 1, characterized in that: One end of the upper grinding roller (12) is connected with a driving assembly (14), and the other end of the upper grinding roller (12) is provided with a buffer assembly (15). The driving assembly (14) includes a first housing (141) and a second housing (142). The second housing (142) is located inside the first housing (141). A fourth motor (143) is installed in the second housing (142). The power end of the fourth motor (143) is connected with one end of the upper grinding roller (12) away from the buffer assembly (15). A buffer spring (144) is arranged between the first housing (141) and the second housing (142). One end of the first housing (141) facing the upper grinding roller (12) is provided with a first buffer port (145). The buffer assembly (15) includes a third housing (151). A buffer table (152) is installed in the third housing (151). One end of the third housing (151) facing the upper grinding roller (12) is provided with a second buffer port (153). The buffer table (152) is rotatably connected with one end of the upper grinding roller (12) away from the fourth motor (143). A limiting spring (154) is installed between the top of the buffer table (152) and the third housing (151). The structure of the lower grinding roller (13) is the same as that of the upper grinding roller (12).

9. The special-shaped steel pipe polishing device according to claim 8, characterized in that: A fifth motor (16) and a sixth motor (17) are installed on the top of the support housing (11). The power ends of the fifth motor (16) and the sixth motor (17) are both connected with a power lead screw (18). The power lead screw (18) includes a forward thread section (181) and a reverse thread section (182). The first housing (141) of the upper grinding roller (12) is threadedly connected with the forward thread section (181). The first housing (141) of the lower grinding roller (13) is threadedly connected with the reverse thread section (182). The third housing (151) of the upper grinding roller (12) is threadedly connected with the forward thread section (181). The third housing (151) of the lower grinding roller (13) is threadedly connected with the reverse thread section (182).

10. A special-shaped steel pipe polishing device according to claim 1, characterized in that: The displacement mechanism (4) includes a second motor (41) and a driving lead screw (42). The second motor (41) is located on the top of the lower support disk (32). One end of the driving lead screw (42) is power-connected with the second motor (41). The other end of the driving lead screw (42) is rotatably connected with the fixed housing (21). The upper support disk (31) is threadedly connected with the driving lead screw (42). The bottom of the upper support disk (31) is slidably connected with the top of the lower support disk (32).

Images