A special-shaped steel pipe polishing device

Abstract

The present invention discloses a special-shaped steel pipe polishing device, which relates to the technical field of steel pipe grinding, and includes an external grinding mechanism, an internal grinding mechanism, a fixing mechanism, and a displacement mechanism. The external grinding mechanism includes a supporting shell, in which an upper grinding roller and a lower grinding roller are horizontally installed. The fixing mechanism includes an upper supporting plate and a lower supporting plate. A first supporting frame and a second supporting frame are installed on the top of the upper supporting plate. A positioning platform is installed on the top of the first supporting frame, and a limiting platform is installed on the top of the second supporting frame. The internal grinding mechanism includes a fixed shell and a grinding rod. A first motor is installed on the top of the fixed shell. The grinding rod includes a grinding head, a rod body, and a driving platform. The first motor is connected to the driving platform by a belt. The displacement mechanism is used to drive the upper supporting plate to move. In this way, the outer wall of the special-shaped steel pipe is ground by the upper grinding roller and the lower grinding roller, and the inner wall of the special-shaped steel pipe is ground by the grinding rod, thereby solving the problem of high labor cost caused by the step-by-step grinding of the existing special-shaped steel pipe.

Description

Technical Field

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

[0002] Special-shaped steel pipes are a general term for seamless steel pipes with cross-sectional shapes other than round pipes. Based on the cross-sectional shape of the steel pipes, they can be divided into uniform wall thickness special-shaped seamless steel pipes, unequal wall thickness special-shaped seamless steel pipes, and variable diameter special-shaped seamless steel pipes.

[0003] After production, special-shaped steel pipes are often piled up in one place. If there is a lot of moisture in the air, the piled-up special-shaped steel pipes are very likely to rust. In order to ensure the normal use of special-shaped steel pipes, we need to polish and grind them before use.

[0004] Existing polishing and grinding equipment has a single function, often only treating the outer surface of special-shaped steel pipes. However, the inner surface of special-shaped steel pipes can also be subject to rust, stains, and other problems, requiring separate polishing of the inner surface of the special-shaped steel pipe. This results in a cumbersome and inefficient polishing process. Summary of the Invention

[0005] In view of the above defects, the purpose of the present invention is to provide a special-shaped steel pipe polishing device, which aims to solve the problem of complicated grinding and polishing steps of special-shaped steel pipes in the prior art.

[0006] In order to solve the above technical problems, the technical solution of the present invention is:

[0007] A special-shaped steel pipe polishing device includes an outer grinding mechanism, an inner grinding mechanism, a fixing mechanism and a displacement mechanism, the outer grinding mechanism includes a supporting shell, an upper grinding roller and a lower grinding roller are horizontally installed in the supporting shell, the upper grinding roller is parallel to the lower grinding roller, the fixing mechanism includes an upper supporting plate and a lower supporting plate, a first supporting frame and a second supporting frame are installed on the top of the upper supporting plate, the supporting shell is located between the first supporting frame and the second supporting frame, a positioning platform is installed on the top of the first supporting frame, and a plurality of special-shaped pins are provided on one end of the positioning platform facing the second supporting frame, and a plurality of special-shaped pins are provided on the top of the second supporting frame. A limiting platform is provided, and a plurality of limiting pins matching the special-shaped pins are provided at one end of the limiting platform facing the first support frame; the internal grinding mechanism includes a fixed shell and a grinding rod, a first motor is installed on the top of the fixed shell, the limiting pin is hollow, the grinding rod includes a grinding head, a rod body and a driving platform, the grinding head is located at the end of the limiting pin facing the special-shaped pin, the driving platform is located inside the fixed shell, 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, and the first motor is connected to the driving platform belt; the displacement mechanism is used to drive the upper support plate to move.

[0008] Wherein, a plurality of grinding brushes are installed on the outer wall of the grinding head, and the plurality of grinding brushes are arranged around the grinding head.

[0009] In which, a liquid spray head is provided at the end of the grinding head away from the driving platform, and the liquid spray head is rotatably connected to the grinding head at the end facing the driving platform, the liquid spray head includes a liquid delivery chamber and a plurality of liquid delivery channels, one end of the liquid delivery channel is connected to the liquid delivery chamber, and the other end of the liquid delivery channel is connected to the outer wall of the liquid spray head; the grinding 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 chamber, the other end of the first channel is connected to the second channel, the end of the second channel away from the first channel is connected to the third channel, the end of the third channel away from the second channel is rotatably connected to a liquid inlet pipe, and the end of the liquid inlet pipe away from the third channel is connected to a liquid supply tank.

[0010] Wherein, a plurality of driving wheels are provided on the outer wall of the driving platform, the power end of the first motor is connected to the driving wheel belt, and the driving wheels between adjacent driving platforms are connected through a pulley.

[0011] Among them, a fixed ring body is also provided 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 rotatably connected to the fixed ring body, the fixed ring body includes an inner ring body and an outer ring body, and several power balls are provided between the outer ring body and the inner ring body. Part of the power ball is tightly attached to the driving platform, and the top of the outer ring body is connected to the fixed shell.

[0012] In which, a plurality of guide columns are arranged inside the positioning platform, and the guide columns are hollow. The end of the special-shaped pin away from the grinding head is threadedly connected to the guide column, and a drainage channel is arranged inside the special-shaped pin, and the drainage channel is communicated with the guide column; the end of the guide column away from the special-shaped pin is rotatably connected to an adapter, the end of the adapter away from the guide column is connected to a collecting pipe, a liquid outlet pipe is connected to the side wall of the collecting pipe, and the end of the liquid outlet pipe away from the collecting pipe is connected to a recovery box.

[0013] 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 guide column, the special-shaped pin is rotatably connected to the positioning platform, the third motor is connected to the power wheel belt, and the power wheels of adjacent guide columns are connected by belts.

[0014] One end of the upper grinding roller is connected to a drive assembly, and the other end of the upper grinding roller is provided with a buffer assembly. The drive assembly includes a first housing and a second housing. The second housing is located inside the first housing. A fourth motor is installed in the second housing. 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 and second housings. A first buffer port is provided at the end of the first housing facing the upper grinding roller. The buffer assembly includes a third housing. A buffer table is installed in the third housing. A second buffer port is provided at the end of the third housing facing the upper grinding roller. The buffer table is rotatably connected to the end of the upper grinding roller away from the fourth motor. A limit spring is installed between the top of the buffer table and the third housing. 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.

[0015] 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.

[0016] 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, and 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.

[0017] After adopting the above technical solution, the beneficial effects of the present invention are:

[0018] First, the outer wall of the special-shaped steel pipe is fully polished by the upper and lower grinding rollers, and the inner wall of the special-shaped steel pipe is fully polished by the grinding rod at the same time, thereby achieving simultaneous polishing of the inner and outer walls of the special-shaped steel pipe, solving the problem of high labor costs and cumbersome 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, which can spray high-speed and high-pressure grinding fluid, and use the grinding fluid to fully polish the inner wall of the special-shaped steel pipe. At the same time, the grinding fluid can also carry away the heat generated by the grinding of the special-shaped steel pipe during the flow process, avoiding the problem of deformation of the special-shaped steel pipe due to local high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of a special-shaped steel pipe polishing device;

[0020] Figure 2 This is the structural diagram of the external grinding mechanism;

[0021] Figure 3 is a structural diagram of the first support frame;

[0022] Figure 4 is a structural diagram of the second support frame;

[0023] Figure 5 It is the structural diagram of the internal grinding mechanism;

[0024] Figure 6 This is a structural diagram of the polishing rod;

[0025] Figure 7 is a cross-sectional view of the polishing rod;

[0026] Figure 8 It is a top view of the driving platform;

[0027] Figure 9 It is a structural diagram of the fixed ring body;

[0028] Figure 10 is a cross-sectional view of the positioning platform;

[0029] Figure 11 This is the structural diagram of the guide column;

[0030] Figure 12 This is a structural diagram of a special-shaped latch;

[0031] Figure 13 It is a cross-sectional view of a special-shaped latch;

[0032] Figure 14 It is a structural diagram of the limit latch;

[0033] Figure 15 for Figure 2 A partial enlarged view of a in the middle;

[0034] Figure 16 for Figure 2 A partial enlarged view of b.

[0035] In the figure: 1-external grinding mechanism, 11-support housing, 12-upper grinding roller, 13-lower grinding roller, 14-drive 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 platform, 153-second buffer port, 154-limit spring, 16-fifth motor, 17-sixth motor, 18-power screw, 181-forward thread segment, 182-reverse thread segment;

[0036] 2-internal grinding mechanism, 21-fixed housing, 22-grinding rod, 221-grinding head, 222-rod body, 223-driving platform, 224-grinding brush, 225-liquid spray head, 226-liquid delivery chamber, 227-liquid delivery 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;

[0037] 3-Fixing mechanism, 31-Upper support plate, 32-Lower support plate, 33-First support frame, 331-Positioning platform, 332-Special-shaped latch, 333-Drainage channel, 334-Connecting section, 335-Positioning section, 336-Positioning plate, 337-Sealing ring, 34-Second support frame, 341-Limiting platform, 342-Limiting latch, 343-Connecting ring, 344-Inner plate, 345-Limiting plate, 346-Limiting hole, 347-Limiting protrusion, 348-Limiting channel, 349-Rolling ball, 35-Guide column, 351-Adapter, 352-Collecting pipe, 353-Liquid outlet pipe, 354-Recovery box, 36-Third motor, 361-Power wheel;

[0038] 4-displacement mechanism, 41-second motor, 42-driving screw, 43-fixed plate, 44-slide, 45-seventh motor, 46-rotating screw. DETAILED DESCRIPTION

[0039] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] Example 1:

[0041] like Figure 1-16 As 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 supporting shell 11, and an upper grinding roller 12 and a lower grinding roller 13 are horizontally installed in the supporting shell 11. The upper grinding roller 12 and the lower grinding roller 13 are parallel.

[0042] In this solution, the special-shaped steel pipe is placed on the fixing mechanism 3. The outer grinding mechanism 1 is used to grind and polish the outer wall of the special-shaped steel pipe, and the inner grinding mechanism 2 is used to grind and polish the inner wall of the special-shaped steel pipe. To facilitate the simultaneous grinding of the outer walls of multiple special-shaped steel pipes, this solution adopts a roller grinding method. To this end, the outer grinding mechanism 1 includes an upper grinding roller 12 and a lower grinding roller 13. 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 polished.

[0043] In order to facilitate the fixing 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, and the top of the upper support plate 31 is equipped with a first support frame 33 and a second support frame 34, and the support shell 11 is located between the first support frame 33 and the second support frame 34, and the top of the first support frame 33 is equipped with a positioning platform 331, and the positioning platform 331 is provided with a plurality of special-shaped pins 332 at one end facing the second support frame 34, and the top of the second support frame 34 is equipped with a limiting platform 341, and the end of the limiting platform 341 facing the first support frame 33 is provided with a plurality of limiting pins 342 matching the special-shaped pins 332. The shapes of the special-shaped pin 332 and the limiting pin 342 in this solution match the inner cavity of the special-shaped steel pipe. When in use, the special-shaped pin 332 and the limiting pin 342 are partially located inside the special-shaped steel pipe, and the function of the first support frame 33 and the second support frame 34 is to lift the special-shaped steel pipe to a certain height.

[0044] In order to facilitate matching with special-shaped steel pipes of different shapes, the special-shaped latch 332 and the limit latch 342 can be replaced with corresponding shapes as needed.

[0045] like Figure 5 As shown, to facilitate grinding the inner wall of the special-shaped steel pipe, 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 drive platform 223. The grinding head 221 is located at the end of the limit pin 342 facing the special-shaped pin 332. The drive 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 drive platform 223. The first motor 23 is connected to the drive platform 223 by a belt. The fixed housing 21 is used to support the grinding rod 22. In the initial state, the limit pin 342 and the special-shaped pin 332 clamp and fix the special-shaped steel pipe. One end of the limit pin 342 is located in the cavity of the special-shaped steel pipe, and the grinding head 221 is also located in the special-shaped steel pipe.

[0046] like Figure 6 As shown, the grinding rod 22 includes a grinding head 221, a rod body 222, and a drive platform 223. The grinding head 221 is located at one end of the stop pin 342 facing the special-shaped pin 332. To facilitate movement of the grinding head 221 toward the other end of the special-shaped steel pipe, the stop pin 342 is hollow, allowing the rod body 222 to pass through the stop pin 342 and connect with the grinding head 221. Driven by the first motor 23, the drive platform 223, the rod body 222, and the grinding head 221 rotate at high speed, wherein the grinding head 221 contacts the inner wall of the special-shaped steel pipe. At this time, the high-speed rotation of the grinding head 221 completes the grinding and polishing process on the inner wall of the special-shaped steel pipe.

[0047] 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 all areas of the special-shaped steel pipe, the displacement mechanism 4 includes a second motor 41 and a drive screw 42. The second motor 41 is located at the top of the lower support plate 32. One end of the drive screw 42 is connected to the second motor 41 for power, and the other end of the drive screw 42 is rotatably connected to the fixed housing 21. The upper support plate 31 is threadedly connected to the drive 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 drive screw 42 to rotate. Since the bottom of the upper support plate 31 is threadedly connected to the drive screw 42, and the upper support plate 31 is slidably connected to the lower support plate 32, when the drive screw 42 rotates, it will drive the upper support plate 31 to slide back and forth on the top of the lower support plate 32. Therefore, the special-shaped steel pipe can move toward the fixed shell 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 interior of the special-shaped steel pipe as the special-shaped steel pipe moves, thereby completing the grinding of the inner wall of the special-shaped steel pipe.

[0048] like Figure 5-7 As shown, if the grinding head 221 is rigid, it will be difficult for the grinding head 221 to adhere tightly to the inner wall of the special-shaped steel pipe, which will result in poor grinding effect. Therefore, a plurality of grinding brushes 224 are installed on the outer wall of the grinding head 221, and the plurality of grinding brushes 224 are arranged around the grinding head 221. The grinding brushes 224 are detachable, 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 various areas of the inner wall of the special-shaped steel pipe.

[0049] Since the inner and outer walls 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, the polishing head 221 is provided with a liquid spray head 225 at one end 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 feeding chamber 226 and a plurality of liquid feeding channels 227. One end of the liquid feeding channel 227 is connected to the liquid feeding chamber 226, and the other end of the liquid feeding 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. Second channel 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.

[0050] In this solution, a high-pressure pump (not shown in the figure) is provided in the liquid supply tank 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 sends the liquid stored in the liquid supply tank 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. 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.

[0051] Preferably, the liquid supply tank 24 contains a milling fluid composed of a mixture of water and diamond powder. This design aims to use high-speed, high-pressure milling fluid to impact the inner wall of the shaped steel pipe. Because the liquid spray head 225 rotates with the grinding head 221, the milling fluid can flush the inner wall of the shaped steel pipe 360 ​​degrees, using the diamond powder to remove burrs, protrusions, and stains on the inner wall of the shaped steel pipe. The grinding brush 224 then performs a secondary grinding of the inner wall, fully ensuring the polishing quality of the inner wall. Furthermore, the milling fluid removes the heat generated by the grinding of the shaped steel pipe during its flow, preventing local deformation of certain areas of the shaped steel pipe caused by the high grinding temperatures.

[0052] like Figure 8 As shown, to facilitate the rotation of the drive platform 223 by the first motor 23, multiple drive wheels 25 are provided on the outer wall of the drive platform 223. The power end of the first motor 23 is connected to the drive wheel 25 by a belt, and the drive wheels 25 between adjacent drive platforms 223 are connected by a pulley. This design allows a single first motor 23 to drive multiple drive platforms 223 to rotate together, thereby ensuring that multiple special-shaped steel pipes can be polished.

[0053] like Figure 9 As shown, in order to facilitate the hoisting of the driving platform 223 on 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 on the driving platform 223 during rotation, the fixed 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. Part of the power balls 263 are in close contact with the driving platform 223, and the top of the outer ring body 262 is connected to the fixed housing 21.

[0054] like Figure 10-13 As shown, in order to facilitate the discharge 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 plurality of guide columns 35 are provided inside the positioning platform 331, and the guide columns 35 are hollow. The end of the special-shaped pin 332 away from the grinding head 221 is threadedly connected to the guide column 35, and a drainage channel 333 is provided inside the special-shaped pin 332, and the drainage channel 333 is connected to the guide column 35; the end of the guide column 35 away from the special-shaped pin 332 is rotatably connected to the adapter 351, and the end of the adapter 351 away from the guide column 35 is connected to the collecting pipe 352, and the side wall of the collecting pipe 352 is connected to a liquid outlet pipe, and the end of the liquid outlet pipe away from the collecting pipe 352 is connected to a recovery box 354. The milling fluid sprayed from the spray head 225 moves toward the special-shaped pin 332 as the grinding rod 22 is advanced. The milling fluid then flows through the drainage channel 333 toward the interior of the guide column 35 and reaches the collecting pipe 352. The milling fluid in the multiple special-shaped steel pipes is collected in the collecting pipe 352 and then reaches the recovery tank 354 through the liquid outlet pipe 353.

[0055] To ensure that every area on the outer wall of the special-shaped steel pipe can be polished, the special-shaped steel pipe needs to be rotated. To this end, a third motor 36 is hoisted at the bottom of the positioning platform 331. Several power wheels 361 are installed on the outer wall of the guide column 35. The special-shaped latch 332 is rotatably connected to the positioning platform 331. The third motor 36 is belt-connected to the power wheels 361, and the power wheels 361 of adjacent guide columns 35 are belt-connected. The third motor 36 drives the guide column 35 to rotate. Because the guide column 35 is threadedly connected to the special-shaped latch 332, and the special-shaped latch 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. Because multiple guide columns 35 are connected by belts, the third motor 36 will drive multiple special-shaped steel pipes to rotate synchronously, ensuring that each special-shaped steel pipe can be fully polished.

[0056] Preferably, the special-shaped plug 332 includes a connecting section 334 and a positioning section 335. The outer wall of the connecting section 334 is provided with an external thread, and the outer wall of the positioning section 335 is provided with a positioning plate 336 and a sealing ring 337. The positioning plate 336 is used to prevent the positioning section 335 from excessively extending into the interior of the special-shaped steel pipe, while the sealing ring 337 is used to prevent the milling fluid in the special-shaped steel pipe from leaking out through the gap.

[0057] like Figure 14 As shown, preferably, the limiting latch 342 includes a connecting ring 343 and an inner disk 344. A limiting plate 345 is provided on the sidewall of the connecting ring 343, and the limiting plate 345 defines a limiting hole 346. A plurality of rolling balls 349 are disposed between the connecting ring 343 and the inner disk 344. A limiting protrusion 347 is provided on the end of the inner disk 344 facing the positioning platform 331. The limiting protrusion 347 includes a limiting channel 348. The limiting channel 348 is disposed around the rod 222, and the grinding head 221 is located at the end of the limiting protrusion 347 away from the inner disk 344. The limiting latch 342 is bolted to the limiting platform 341 via the limiting plate 345. The limiting protrusion 347 extends into and engages with the special-shaped steel pipe, and the rod 222 passes through the limiting channel 348 to enter the interior of the special-shaped steel pipe.

[0058] The limiting protrusion 347 in the figure is set to be square for the purpose of fixing the square steel pipe. The staff can choose the shape of the limiting protrusion 347 according to their needs.

[0059] like Figure 2 、 Figure 15 、 Figure 16As shown, in order to facilitate the driving of the upper grinding roller 12 and the lower grinding roller 13 to rotate, one end of the upper grinding roller 12 is connected to a driving assembly 14, and the other end of the upper grinding roller 12 is provided with a buffer assembly 15, and the driving assembly 14 includes a first shell 141 and a second shell 142, the second shell 142 is located inside the first shell 141, and a fourth motor 143 is installed in the second shell 142. The power end of the fourth motor 143 is connected to the end of the upper grinding roller 12 away from the buffer assembly 15, and a buffer spring is provided between the first shell 141 and the second shell 142. Spring 144, a first buffer port 145 is provided at one end of the first shell 141 facing the upper grinding roller 12; the buffer assembly 15 includes a third shell 151, a buffer platform 152 is installed in the third shell 151, and a second buffer port 153 is provided at one end of the third shell 151 facing the upper grinding roller 12, the buffer platform 152 is rotatably connected to the end of the upper grinding roller 12 away from the fourth motor 143, and a limit spring 154 is installed between the top of the buffer platform 152 and the third shell 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. Due to the different shapes of the special-shaped steel pipes, 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, this solution introduces a buffer spring 144 and a limit spring 154. Taking the elliptical steel pipe as an example, when it rotates, it pushes the upper grinding roller 12 and the lower grinding roller 13 to squeeze the buffer spring 144 and the limit spring 154, which changes the distance between the two, so that the side of the elliptical steel pipe can be fully polished.

[0060] In order to conveniently control the distance between the upper grinding roller 12 and the lower grinding roller 13, so as to facilitate the grinding of special-shaped steel pipes of different sizes and shapes, a fifth motor 16 and a sixth motor 17 are installed on the top of the support shell 11. The power ends of the fifth motor 16 and the sixth motor 17 are both connected to a power screw 18, which includes a forward thread segment 181 and a reverse thread segment 182. The first shell 141 of the upper grinding roller 12 is threadedly connected to the forward thread segment 181, and the first shell 141 of the lower grinding roller 13 is threadedly connected to the reverse thread segment 182; the third shell 151 of the upper grinding roller 12 is threadedly connected to the forward thread segment 181, and the third shell 151 of the lower grinding roller 13 is threadedly connected to the reverse thread segment 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, making it convenient for us to control the distance between the two grinding rollers.

[0061] like 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. The fixed plate 43 includes a slide 44. A seventh motor 45 is installed at the end of the fixed plate 43 away from the support shell 11. A rotating screw 46 is installed in the slide 44. One end of the rotating screw 46 is connected to the seventh motor 45 for power, and the other end of the rotating screw 46 is connected to the inner wall of the slide 44 for rotation. The first support frame 33 is slidably arranged in the slide 44, and the first support frame 33 is threadedly connected to 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 special-shaped steel pipes.

[0062] 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 degree of elasticity.

[0063] 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, while the inner wall of the special-shaped steel pipe is fully polished by the grinding rod 22, thereby achieving simultaneous polishing of the inner and outer walls of the special-shaped steel pipe, solving the problem of high labor costs and cumbersome 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. The liquid spray head 225 is capable of spraying high-speed and high-pressure milling fluid, which is used to fully polish the inner wall of the special-shaped steel pipe. At the same time, the milling fluid can also carry 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.

[0064] The present invention is not limited to the above-mentioned specific implementation methods. Various changes made by ordinary technicians in this field based on the above-mentioned concept without creative work are all within the scope of protection of the present invention.

Claims

1. A special-shaped steel pipe polishing device, comprising an outer grinding mechanism (1), an inner grinding mechanism (2), a fixing mechanism (3) and a displacement mechanism (4), wherein the outer grinding mechanism (1) comprises a supporting shell (11), an upper grinding roller (12) and a lower grinding roller (13) are horizontally mounted in the supporting shell (11), and the upper grinding roller (12) and the lower grinding roller (13) are parallel, and characterized in that: The fixing mechanism (3) comprises 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 shell (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 plurality of special-shaped pins (332) are provided on 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 plurality of limiting pins (342) matching the special-shaped pins (332) are provided on one end of the limiting platform (341) facing the first support frame (33); the inner grinding mechanism ( 2) comprising a fixed shell (21) and a grinding rod (22), wherein a first motor (23) is mounted on the top of the fixed shell (21), the limiting latch (342) is hollow, the grinding rod (22) comprises 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 latch (342) facing the special-shaped latch (332), the driving platform (223) is located inside the fixed shell (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), and 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 plate (31) to move; A plurality of grinding brushes (224) are installed on the outer wall of the grinding head (221), and the plurality of grinding brushes (224) are arranged around the grinding head (221); A liquid spray head (225) is provided at one end of the grinding head (221) away from the driving platform (223), and the end of the liquid spray head (225) facing the driving platform (223) is rotatably connected to the grinding head (221). 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 grinding head (221) includes a first channel (228), the rod body (222) includes a second channel (229), and the driving platform (223) The invention comprises 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 a liquid inlet pipe (241), and the end of the liquid inlet pipe (241) away from the third channel (230) is connected to a liquid supply box (24); the liquid supply box (24) contains milling fluid, and the milling fluid is composed of a mixture of water and diamond powder; A plurality of guide columns (35) are provided inside the positioning platform (331), and the guide columns (35) are hollow. One end of the special-shaped latch (332) away from the grinding head (221) is threadedly connected to the guide column (35), and a drainage channel (333) is provided inside the special-shaped latch (332), and the drainage channel (333) is communicated with the guide column (35); one end of the guide column (35) away from the special-shaped latch (332) is rotatably connected to an adapter (351), and one end of the adapter (351) away from the guide column (35) is connected to a collecting pipe (352), a side wall of the collecting pipe (352) is connected to a liquid outlet pipe, and one end of the liquid outlet pipe away from the collecting pipe (352) is connected to a recovery box (354); 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 guide column (35), the special-shaped latch (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) of adjacent guide columns (35) are connected by a belt.

2. The special-shaped steel pipe polishing device according to claim 1, characterized in that: A plurality of driving wheels (25) are provided 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 via a belt pulley.

3. The special-shaped steel pipe polishing device according to claim 2, characterized in that: 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 shell (21), the driving platform (223) is rotatably connected to the fixed ring body (26), the fixed 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 ball (263) is in close contact with the driving platform (223), and the top of the outer ring body (262) is connected to the fixed shell (21).

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

5. The special-shaped steel pipe polishing device according to claim 4, characterized in that: A fifth motor (16) and a sixth motor (17) are installed on the top of the support shell (11); the power end of the fifth motor (16) and the power end of the sixth motor (17) are both connected to a power screw (18); the power screw (18) includes a forward thread segment (181) and a reverse thread segment (182); the first shell (141) of the upper grinding roller (12) is threadedly connected to the forward thread segment (181); the first shell (141) of the lower grinding roller (13) is threadedly connected to the reverse thread segment (182); the third shell (151) of the upper grinding roller (12) is threadedly connected to the forward thread segment (181); the third shell (151) of the lower grinding roller (13) is threadedly connected to the reverse thread segment (182).

6. The special-shaped steel pipe polishing device according to claim 1, characterized in that: The displacement mechanism (4) comprises a second motor (41) and a driving screw (42), wherein the second motor (41) is located at the top of the lower support plate (32), one end of the driving screw (42) is connected to the second motor (41) in a power manner, and the other end of the driving screw (42) is connected to the fixed housing (21) in a rotational manner, the upper support plate (31) is connected to the driving screw (42) in a threaded manner, and the bottom of the upper support plate (31) is connected to the top of the lower support plate (32) in a sliding manner.

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