Automatic polishing device for inner wall of rectangular metal pipe

Abstract

The invention relates to the technical field of polishing equipment, in particular to a rectangular metal pipe inner wall automatic polishing device which comprises a movable shell part, a rotary supporting part, a polishing part A and a polishing part B. The equipment is placed in a rectangular pipe, the equipment is sucked on the rectangular pipe through the wheels with the suction cups, and the polishing plate abuts against the corners in the rectangular pipe; and the polishing belt set ascends and abuts against the inner wall of the rectangular pipe, the polishing belt set rotates, and the inner wall of the rectangular pipe is polished. And the equipment moves, so that the polishing plate and the polishing belt group polish the inner wall of the rectangular pipe. After the equipment moves to the other end of the rectangular pipe, the polishing belt set moves downwards, then the lower portion is polished, and the inner walls of the two sides of the rectangular pipe are polished repeatedly; and the equipment return supporting rod abuts against the inner wall of the rectangular pipe, the movable shell part rotates, the supporting rod is separated from the double-face threaded plate, the pipeline with the groove moves, the equipment returns after stopping, polishing operation is repeated, and then the inner wall of the rectangular pipe is completely polished.

Description

Technical Field

[0001] This invention relates to the field of polishing equipment technology, and in particular to an automatic polishing device for the inner wall of a rectangular metal tube. Background Technology

[0002] With social development, technological advancements, and improvements in people's lives, metal pipes are being used in more and more fields. Metal pipes come in various shapes, including rectangular ones. While the outer walls and ends of rectangular metal pipes can be polished with tools, there are few tools available for polishing the inside. When the inside of a rectangular pipe needs polishing, there are no tools available for people to perform the polishing.

[0003] The invention disclosed in patent number CN202011044579.3 is an automatic grinding device for the inner wall of a metal tube. It includes a body with a mounting cavity inside. A first motor is fixedly mounted on the inner wall of the right side of the mounting cavity. A first rotating shaft is symmetrically rotated at the left and right ends of the first motor, penetrating the inner walls of the left and right sides of the mounting cavity. A grinding mechanism is mounted on the first rotating shaft. The grinding mechanism includes a fixed shell fixedly mounted on the left end face of the first rotating shaft. A second motor is mounted inside the fixed shell. A second rotating shaft is symmetrically rotated at the upper and lower ends of the second motor. Two grinding cavities are symmetrically arranged on the fixed shell around the second motor. During use, the built-in cleaning mechanism cleans the tube wall to prevent metal slag from affecting the grinding quality. The cleaned metal slag is scraped away by a scraper. Then, the grinding mechanism gradually grinds the inner wall of the metal tube as the body moves inside, increasing the grinding success rate.

[0004] The aforementioned invention patent mainly addresses the cleaning of metal slag from grinding, but it does not mention polishing rectangular cross-section pipes. Therefore, a device capable of polishing rectangular metal pipes is needed. Summary of the Invention

[0005] To address the above problems, the present invention provides an automatic polishing device for the inner wall of a rectangular metal pipe, thereby solving the problem of polishing the inside of a rectangular metal pipe.

[0006] The technical solution used in this invention is: an automatic polishing device for the inner wall of a rectangular metal tube, comprising a movable outer shell, a rotating support, a polishing A section, and a polishing B section; the movable outer shell is placed inside the rectangular tube; the rotating support consists of two symmetrical parts, with two fixed plates C respectively rotatably mounted on the shaft of the fixed plate B and on the shaft of one side of the grooved pipe; the connecting block B in the polishing A section is rotatably mounted on the fixed plate A; the U-shaped plate in the polishing B section is fixedly mounted on the bottom of the grooved pipe, and the two ends of the connecting block C are slidably mounted in the groove of the fixed plate A.

[0007] Preferably, the movable outer casing includes: a grooved pipe, a fixing plate A, a fixing plate B, a wheel with a suction cup, a power unit A, and a sprocket assembly; Two fixing plates A are fixedly installed on the inner sides of the two upper pipes respectively; two fixing plates B are fixedly installed inside the pipes on both sides of the grooved pipe; there are two sets of wheels with suction cups, one set is rotatably installed in the hole of the U-shaped plate, and the other set is rotatably installed in the grooved pipe.

[0008] Preferably, the power unit A is installed inside the grooved pipe, and the sprocket set is installed on the sprockets of two sets of wheels with suction cups, which is used to drive the wheels of multiple suction cups synchronously. The power unit A is used to drive the wheels of multiple suction cups.

[0009] Preferably, the rotating support includes: a housing A, a fixing plate C, a double-sided threaded plate, a power unit B, a sliding plate A, a connecting block A, a support rod, and a power unit C; The outer casing A is fixedly installed on the outside of the fixed plate C; the two fixed plates C are rotatably installed on the shafts of the two fixed plates B respectively; the double-sided threaded plate is rotatably installed inside the outer casing A; the motor of the power unit B is fixedly installed inside the outer casing A; the sliding plate A on one side of the double-sided threaded plate is fixedly installed in the groove inside the outer casing A, and the sliding plate A on the other side of the double-sided threaded plate is fixedly installed in the groove inside the fixed plate C; the connecting block A is fixedly connected to the sliding plate A, and the support rod is slidably installed in the groove of the connecting block A, with the side groove of the support rod threadedly engaged with the double-sided threaded plate; the motor of the power unit C is fixedly installed on the fixed plate C.

[0010] Preferably, the polishing section A includes: a polishing plate, a toothed plate, a connecting block B, and a power unit D; The toothed plate has a shaft on one side that is rotatably installed in the hole of the connecting plate inside the polishing plate. The toothed plate is slidably installed in the groove of the connecting block B. The connecting block B is fixedly installed on one side of the fixing plate A. The motor of the power unit D is fixedly installed on the connecting block B. The gear of the power unit D meshes with the teeth on the toothed plate.

[0011] Preferably, the polishing section B includes: a connecting block C, a lifting rod assembly A, a connecting plate A, a polishing belt assembly, a power screw A, a moving plate A, a power assembly E, a U-shaped plate, a lifting rod assembly B, a moving plate B, and a power screw B; The two ends of the connecting block C are slidably installed in the grooves inside the fixed plate A; one side of each of the two lifting rod groups A is movably installed in the grooves of the left and right side baffles of the connecting block C, and the other side of the lifting rod group A is movably installed in the groove inside the connecting plate A; the power screw A is rotatably installed in the hole of the baffle on the side of the connecting block C, and one side of the power screw A is threadedly installed in the threaded hole of the moving plate A; the moving plate A is slidably installed in the groove of the connecting block C, and the moving plate A and the lifting rod group A are connected by rotation; the motor of the power group E is fixedly installed in the groove of the baffle in the middle of the connecting block C; Preferably, the U-shaped plate is fixedly installed at the bottom of the grooved pipe; the two ends of the lifting rod assembly B are respectively movably installed in the grooves of the baffles on both sides of the U-shaped plate and in the groove of the lower baffle of the connecting block C; Preferably, the movable plate B is rotatably mounted on a shaft on one side of the lower end of the lifting rod assembly B; the power screw B is rotatably mounted in the hole of the inner baffle of the U-shaped plate, the power screw B is threadedly mounted in the threaded hole of the movable plate B, and a motor is mounted on the power screw B to drive the power screw B to rotate.

[0012] Beneficial effects: 1. By setting polishing part A and polishing part B, the present invention polishes the inside of the rectangular pipe, achieving more comprehensive polishing of the inside of the rectangular pipe, increasing the polishing ratio, and achieving high-efficiency polishing; 2. After the equipment moves to the other end of the rectangular tube, the power screw B rotates in the opposite direction to move the polishing belt assembly down a certain position, and then polishes the lower part. This process is repeated to polish the inner walls on both sides of the rectangular tube, achieving repeated polishing and making the polishing effect better. 3. The power unit B of the present invention causes the top of the support rod to press against the inner wall of the rectangular tube, and the power unit C causes the movable outer shell, polishing A and polishing B to rotate by a certain angle, thereby adjusting the polishing angle and polishing from multiple angles. 4. When the support rod of the present invention disengages from the double-sided threaded plate and the connecting block C pushes the grooved pipe to move, after the movement stops, the support rod contacts the double-sided threaded plate and engages with the thread. The power unit B and the spring return the equipment to its original position. After rotating the movable outer shell, different surfaces can be polished, thereby achieving multi-face polishing. 5. This provides people with a quick polishing device for the inner wall of rectangular tubes, making the polishing of the inner wall of rectangular tubes more convenient and improving work efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first angle.

[0014] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second angle.

[0015] Figure 3 This is a schematic diagram of the overall structure of the present invention from a third angle.

[0016] Figure 4 This is a structural schematic diagram of the movable outer casing portion of the present invention at a first angle.

[0017] Figure 5 This is a structural schematic diagram of the movable outer casing portion of the present invention from a second angle.

[0018] Figure 6 This is a schematic diagram of the internal structure of the movable outer casing of the present invention.

[0019] Figure 7 This is a schematic diagram of the movable outer shell and rotating support parts of the present invention.

[0020] Figure 8 This is a schematic diagram of the internal structure of the rotating support part of the present invention.

[0021] Figure 9 This is a partial structural schematic diagram of the rotating support part of the present invention.

[0022] Figure 10 This is a schematic diagram illustrating the operation of the present invention.

[0023] Figure 11 This is a schematic diagram of the structure of the movable outer shell and the polishing A part of the present invention.

[0024] Figure 12 This is a partial structural diagram of the movable outer shell and polishing part A of the present invention.

[0025] Figure 13 This is a schematic diagram of the structure of the polishing part B in its retracted state according to the present invention.

[0026] Figure 14 This is a schematic diagram of the overall structure of the polishing part B of the present invention.

[0027] Figure 15 This is a partial structural diagram of the polishing part B of the present invention.

[0028] Figure 16 This is a partial structural diagram of the polishing part B of the present invention.

[0029] Reference numerals: 1-Moving outer casing; 2-Rotating support; 3-Polishing A; 4-Polishing B; 101-Groove pipe; 102-Fixing plate A; 103-Fixing plate B; 104-Wheel with suction cup; 105-Power unit A; 106-Sprocket assembly; 201-Outer casing A; 202-Fixing plate C; 203-Double-sided threaded plate; 204-Power unit B; 205-Sliding plate A; 206-Connecting block A; 207- Support rod; 208-Power unit C; 301-Polishing plate; 302-Toothed plate; 303-Connecting block B; 304-Power unit D; 401-Connecting block C; 402-Lifting rod assembly A; 403-Connecting plate A; 404-Polishing belt assembly; 405-Power screw A; 406-Moving plate A; 407-Power unit E; 408-U-shaped plate; 409-Lifting rod assembly B; 410-Moving plate B; 411-Power screw B. Detailed Implementation

[0030] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] In the description of this invention, it should be noted that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are merely simplified descriptions for ease of description and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, spatial relative terms, such as "below," "below," "below," "above," and "above," may be used for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the accompanying drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used herein can be interpreted accordingly. It should be noted that in this document, some connection methods, such as "fixed connection" and "fixed installation," refer to, but are not limited to, fixing two components by means of welding, screw and nut fastening, adhesive, riveting, interference fit, etc. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0033] Implementation, for example Figure 1-16As shown in the figure, an automatic polishing device for the inner wall of a rectangular metal tube includes a movable outer shell 1, a rotating support 2, a polishing A section 3, and a polishing B section 4. The movable outer shell 1 is placed inside the rectangular tube. The rotating support 2 consists of two symmetrical parts, with two fixed plates C202 rotatably mounted on the shaft of the fixed plate B103 and the shaft on one side of the grooved pipe 101, respectively. The connecting block B303 in the polishing A section 3 is rotatably mounted on the fixed plate A102. The U-shaped plate 408 in the polishing B section 4 is fixedly mounted on the bottom of the grooved pipe 101, and the two ends of the connecting block C401 are slidably mounted in the grooves of the fixed plate A102. The movable outer shell 1 drives the device to move, the rotating support 2 drives the device to rotate, and the polishing A section 3 and the polishing B section 4 polish the inside of the rectangular tube, thereby polishing the inside of the rectangular tube.

[0034] In one optional embodiment of the present invention, in addition to the same parts as in the previous embodiment, the movable housing 1 includes: a grooved pipe 101, a fixing plate A102, a fixing plate B103, a wheel 104 with a suction cup, a power unit A105, and a sprocket assembly 106. The grooved pipe 101 is shaped such that both ends are pipes, and circular plates are fixedly installed on the outside of the two pipe sections, with the middle section connected by the plates (e.g., ...). Figure 4 (As shown); two fixing plates A102 are respectively fixedly installed on the inner sides of the two pipes on 101; two fixing plates B103 are fixedly installed inside the pipes on both sides of the grooved pipe 101, and a shaft is fixedly installed on the fixing plate B103. The shaft passes through the circular plate of the grooved pipe 101 and is rotatably installed with the fixing plate C202; there are two sets of suction cup wheels 104, one set is rotatably installed in the hole of the U-shaped plate 408, and the other set is rotatably installed in the grooved pipe 101; the suction cup wheels 104 can fix the equipment inside the pipe through the suction cups, which is convenient for polishing operations; the power unit A105 is installed inside the grooved pipe 101, and the sprocket set 106 is installed on the sprockets of the two sets of suction cup wheels 104, which is used to drive the multiple suction cup wheels 104 synchronously. The power unit A105 is used to drive the multiple suction cup wheels 104.

[0035] Specifically, the device is first placed in a rectangular tube, the wheel 104 with suction cups contacts the bottom of the rectangular tube, and the device is attached to the rectangular tube by the suction cups on the wheel 104 with suction cups. The motor of the power unit A105 starts and drives the gear of the power unit A105 to rotate, which in turn drives the wheel 104 with suction cup to rotate, which in turn drives the sprocket group 106 to rotate, which in turn drives all the wheels 104 with suction cup to rotate, which in turn drives the equipment to move, and then the polishing plate 301 and the polishing belt group 404 polish the inner wall of the rectangular tube.

[0036] In one optional embodiment of the present invention, in addition to the same parts as in the previous embodiment, the rotating support 2 includes: a housing A201, a fixing plate C202, a double-sided threaded plate 203, a power unit B204, a sliding plate A205, a connecting block A206, a support rod 207, and a power unit C208. The outer casing A201 is fixedly installed on the outside of the fixing plate C202; the two fixing plates C202 are respectively rotatably installed on the shafts of the two fixing plates B103; the double-sided threaded plate 203 is rotatably installed inside the outer casing A201; the power unit B204 includes: a motor and a gear, the gear connecting the motor and the double-sided threaded plate 203, the motor of the power unit B204 is fixedly installed inside the outer casing A201; the sliding plate A205 on one side of the double-sided threaded plate 203 is fixedly installed in a groove inside the outer casing A201, and the sliding plate A205 on the other side of the double-sided threaded plate 203 is fixedly installed in a groove inside the fixing plate C202; the connecting block A206 is fixedly connected to the sliding plate A205, and the support rod 207 is slidably installed in the groove of the connecting block A206, the side groove of the support rod 207 is connected to the double-sided threaded plate 203. The textured plate 203 is threaded; only half of the inner side of the support rod 207 is threaded, which meshes with half of the thread of the double-sided threaded plate 203; the power unit C208 includes: a motor and a gear, the gear connecting the motor and the shaft of the fixed plate B103, and the motor of the power unit C208 is fixedly mounted on the fixed plate C202; specifically, the motor of the power unit B204 starts and drives the gear of the power unit B204 to rotate, thereby driving the double-sided threaded plate 203 to rotate, and then driving the support rod 207 to move so that the top of the support rod 207 abuts against the inner wall of the rectangular tube, the motor of the power unit C208 starts and drives the gear of the power unit C208 to rotate, thereby driving the fixed plate B103 to rotate, and then driving the grooved pipe 101 to rotate, thereby causing the movable outer shell part 1, polishing part A 3, and polishing part B 4 to rotate by a certain angle; After polishing is completed, the power unit E407 drives the power screw A405 to rotate in the opposite direction, thereby causing the lifting rod group A402 to retract, and then the polishing belt group 404 is retracted to its original position. The power screw B411 reverses and drives the lifting rod group B409 to retract, which in turn causes the power screw B411 to move down to its original position. The power unit B204 drives the double-sided threaded plate 203 to rotate in the opposite direction, thereby moving the support rod 207 and causing the support rod 207 to retract to its original position.

[0037] In one optional embodiment of the present invention, in addition to the same parts as in the previous embodiment, the polishing A part 3 includes: a polishing plate 301, a toothed plate 302, a connecting block B303, and a power unit D304; A connecting plate with holes is installed on the inner side of the polishing plate 301; a shaft on one side of the toothed plate 302 is rotatably installed in the hole of the connecting plate on the inner side of the polishing plate 301, and the toothed plate 302 is slidably installed in the groove of the connecting block B303; the connecting block B303 is fixedly installed on one side of the fixing plate A102; the power unit D304 includes a motor and a gear, the gear is installed on the shaft of the motor, the motor of the power unit D304 is fixedly installed on the connecting block B303, and the gear of the power unit D304 meshes with the teeth on the toothed plate 302; specifically, the motor of the power unit D304 starts and drives the gear of the power unit D304 to rotate, thereby driving the toothed plate 302 to move, and then causing the polishing plate 301 to press against the corner inside the rectangular tube; the movement of the machine causes the polishing plate 301 to polish the inner wall of the pipe; The motor of the power unit D304 reverses, causing the gear of the power unit D304 to rotate, thereby causing the toothed plate 302 to move back, and then causing the polishing plate 301 to move back to its original position.

[0038] In one optional embodiment of the present invention, in addition to the same parts as in the previous embodiment, the polishing part B 4 includes: a connecting block C401, a lifting rod assembly A402, a connecting plate A403, a polishing belt assembly 404, a power screw A405, a moving plate A406, a power assembly E407, a U-shaped plate 408, a lifting rod assembly B409, a moving plate B410, and a power screw B411; The connecting block C401 is slidably installed at both ends in the grooves inside the fixed plate A102; one side of each of the two lifting rod assemblies A402 is movably installed in the grooves of the left and right side baffles of the connecting block C401, and the other side of the lifting rod assembly A402 is movably installed in the groove inside the connecting plate A403; a polishing belt assembly 404 is installed on the outer side of the connecting plate A403; the polishing belt assembly 404 is driven by a motor, and the polishing belt of the polishing belt assembly 404 is rotated by the motor to complete the polishing; the power screw A405 is rotatably installed in the hole of the baffle on the side of the connecting block C401. One side of the power screw A405 is threaded into the threaded hole of the movable plate A406; the movable plate A406 is slidably installed in the groove of the connecting block C401, and the movable plate A406 is connected to the lifting rod assembly A402 on one side; the power assembly E407 includes: a motor and a chain assembly, the chain assembly connecting the two power screws A405 to the motor, and the motor of the power assembly E407 is fixedly installed in the groove of the baffle in the middle of the connecting block C401; the U-shaped plate 408 is fixedly installed at the bottom of the grooved pipe 101; the two ends of the lifting rod assembly B409 are respectively movably installed on the U-shaped plate 402. 8. The grooves of the side baffles and the groove of the lower baffle of the connecting block C401 are located in the grooves of the side baffles. The moving plate B410 is rotatably mounted on a shaft on one side of the lower end of the lifting rod assembly B409. The power screw B411 is rotatably mounted in the hole of the inner baffle of the U-shaped plate 408. The power screw B411 is threaded in the threaded hole of the moving plate B410. A motor is mounted on the power screw B411 to drive the power screw B411 to rotate. Specifically, the rotation of the motor of the power screw B411 drives the power screw B411 to rotate, thereby driving the moving plate B410 to move, and then driving the lifting rod assembly B409. 9. Pull up to a certain height, causing the connecting block C401 and the polishing belt assembly 404 to move outward a certain distance, so that the connecting block C401 contacts the inner wall of the rectangular tube. The motor of the power assembly E407 starts, causing the chain assembly of the power assembly E407 to rotate, thereby causing the power screw A405 to rotate, which in turn causes the moving plate A406 to move, thereby causing the lifting rod assembly A402 to pull apart a certain distance, and then causing the polishing belt assembly 404 to press against the inner wall of the rectangular tube. The motor installed on the polishing belt assembly 404 starts, causing the polishing belt assembly 404 to rotate, thereby polishing the inner wall of the rectangular tube. When the equipment moves to the other end of the rectangular tube, the power screw B411 rotates in the opposite direction, driving the moving plate B410 to move, thereby causing the lifting rod group B409 to drop to a certain height, which in turn causes the connecting block C401 to drop to a certain height, and then causes the polishing belt group 404 to move down to a certain position, and then polishing of the lower position is carried out. This process is repeated to polish the inner walls of both sides of the rectangular tube. After polishing is completed, the power unit E407 drives the power screw A405 to rotate in the opposite direction, thereby causing the lifting rod assembly A402 to retract, and then retracting the polishing belt assembly 404 to its original position. The power screw B411 reverses and drives the lifting rod assembly B409 to retract, which in turn causes the power screw B411 to move down to its original position.

[0039] Working principle: When it is necessary to polish the inside of a rectangular tube, use this equipment. First, lay the steel tube to be polished flat, then put this equipment into the rectangular tube, so that the wheel 104 with suction cups contacts the bottom of the rectangular tube, and the equipment is sucked onto the rectangular tube by the suction cups on the wheel 104 with suction cups. The motor of the power unit D304 starts and drives the gear of the power unit D304 to rotate, thereby moving the toothed plate 302, which in turn causes the polishing plate 301 to press against the corner inside the rectangular tube. The motor of the power screw B411 rotates, causing the power screw B411 to rotate, which in turn moves the moving plate B410, which in turn moves the lifting rod assembly B409 to a certain height, causing the connecting block C401 and the polishing belt assembly 404 to rise to a certain height. The connecting block C401 contacts the top wall inside the rectangular tube. The motor of the power assembly E407 starts, causing the chain assembly of the power assembly E407 to rotate, which in turn rotates the power screw A405, which in turn moves the moving plate A406, causing the lifting rod assembly A402 to open a certain distance, which in turn causes the polishing belt assembly 404 to press against the inner wall of the rectangular tube. The motor installed on the polishing belt assembly 404 starts, causing the polishing belt assembly 404 to rotate, thereby polishing the inner wall of the rectangular tube. The motor of the power unit A105 starts and drives the gear of the power unit A105 to rotate, which in turn drives the wheel 104 with suction cup to rotate, which in turn drives the sprocket group 106 to rotate, which in turn drives all the wheels 104 with suction cup to rotate, which in turn drives the equipment to move, and then the polishing plate 301 and the polishing belt group 404 polish the inner wall of the rectangular tube. When the equipment moves to the other end of the rectangular tube, the power screw B411 rotates in the opposite direction, driving the moving plate B410 to move, thereby causing the lifting rod group B409 to drop to a certain height, which in turn causes the connecting block C401 to drop to a certain height, and then causes the polishing belt group 404 to move down to a certain position, and then polishing of the lower position is carried out. This process is repeated to polish the inner walls of both sides of the rectangular tube. After polishing is completed, the power unit E407 drives the power screw A405 to rotate in the opposite direction, thereby causing the lifting rod assembly A402 to retract, and then retracting the polishing belt assembly 404 to its original position. The power screw B411 reverses and drives the lifting rod assembly B409 to retract, and then drives the power screw B411 to move down to its original position. The motor of the power unit D304 reverses and drives the gear of the power unit D304 to rotate, thereby causing the toothed plate 302 to move back, and then causing the polishing plate 301 to move back to its original position. The motor of power unit B204 starts and drives the gear of power unit B204 to rotate, thereby driving the double-sided threaded plate 203 to rotate, which in turn drives the support rod 207 to move so that the top of the support rod 207 presses against the inner wall of the rectangular tube. The motor of power unit C208 starts and drives the gear of power unit C208 to rotate, thereby driving the fixed plate B103 to rotate, which in turn drives the grooved pipe 101 to rotate, thereby causing the movable outer shell 1, polishing A part 3, and polishing B part 4 to rotate by a certain angle. The power unit B204 drives the double-sided threaded plate 203 to rotate in the opposite direction, thereby moving the support rod 207 and causing the support rod 207 to retract to its original position.

[0040] The lifting rod assembly A402 drives the polishing belt assembly 404 to move, so that the polishing belt assembly 404 contacts the inner wall of the rectangular tube. The polishing plate 301 moves to the corner of the rectangular tube, and the wheel 104 with a suction cup drives the equipment to move, thereby performing the polishing operation. By repeating this process, the entire inner wall of the rectangular tube is polished. This provides people with a quick polishing device for the inner wall of rectangular tubes, making the polishing process more convenient and improving work efficiency.

Claims

1. An automatic polishing device for the inner wall of a rectangular metal tube, characterized in that, It includes a movable outer shell (1), a rotating support (2), a polishing A section (3), and a polishing B section (4); the movable outer shell (1) is placed inside a rectangular tube; the rotating support (2) consists of two symmetrical parts, with two fixed plates C (202) respectively rotatably mounted on the shaft of the fixed plate B (103) and on the shaft of the grooved pipe (101) on one side; the connecting block B (303) in the polishing A section (3) is rotatably mounted on the fixed plate A (102); the U-shaped plate (408) in the polishing B section (4) is fixedly mounted on the bottom of the grooved pipe (101), and the two ends of the connecting block C (401) are slidably mounted in the groove of the fixed plate A (102).

2. The automatic polishing device for the inner wall of a rectangular metal tube according to claim 1, characterized in that, The movable outer casing (1) includes: a grooved pipe (101), a fixing plate A (102), a fixing plate B (103), a wheel with a suction cup (104), a power unit A (105), and a sprocket assembly (106). The two fixing plates A (102) are respectively fixedly installed on the inner side of the two pipes on (101); the two fixing plates B (103) are fixedly installed inside the pipes on both sides of the grooved pipe (101); there are two sets of suction cup wheels (104), one set is rotatably installed in the hole of the U-shaped plate (408), and the other set is rotatably installed in the grooved pipe (101).

3. The automatic polishing device for the inner wall of a rectangular metal tube according to claim 2, characterized in that, The power unit A (105) is installed inside the grooved pipe (101), and the sprocket set (106) is installed on the sprockets of two sets of suction cup wheels (104) to drive the multiple suction cup wheels (104) synchronously. The power unit A (105) is used to drive the multiple suction cup wheels (104).

4. The automatic polishing device for the inner wall of a rectangular metal tube according to claim 1, characterized in that, The rotating support part (2) includes: outer shell A (201), fixed plate C (202), double-sided threaded plate (203), power unit B (204), sliding plate A (205), connecting block A (206), support rod (207), and power unit C (208); The outer shell A (201) is fixedly installed on the outside of the fixed plate C (202); the two fixed plates C (202) are respectively rotatably installed on the shafts of the two fixed plates B (103); the double-sided threaded plate (203) is rotatably installed inside the outer shell A (201); the motor of the power group B (204) is fixedly installed inside the outer shell A (201); the sliding plate A (205) on one side of the double-sided threaded plate (203) is fixedly installed in the groove inside the outer shell A (201), and the sliding plate A (205) on the other side of the double-sided threaded plate (203) is fixedly installed in the groove inside the fixed plate C (202); the connecting block A (206) is fixedly connected to the sliding plate A (205), and the support rod (207) is slidably installed in the groove of the connecting block A (206), and the side groove of the support rod (207) is threadedly engaged with the double-sided threaded plate (203); the motor of the power group C (208) is fixedly installed on the fixed plate C (202).

5. The automatic polishing device for the inner wall of a rectangular metal tube according to claim 1, characterized in that, The polishing section A (3) includes: a polishing plate (301), a toothed plate (302), a connecting block B (303), and a power unit D (304); The toothed plate (302) is rotatably mounted on one side of the shaft in the hole of the connecting plate inside the polishing plate (301), and the toothed plate (302) is slidably mounted in the groove of the connecting block B (303); the connecting block B (303) is fixedly mounted on one side of the fixing plate A (102); the motor of the power group D (304) is fixedly mounted on the connecting block B (303), and the gear of the power group D (304) meshes with the teeth on the toothed plate (302).

6. The automatic polishing device for the inner wall of a rectangular metal tube according to claim 1, characterized in that, Polishing section B (4) includes: connecting block C (401), lifting rod assembly A (402), connecting plate A (403), polishing belt assembly (404), power screw A (405), moving plate A (406), power assembly E (407), U-shaped plate (408), lifting rod assembly B (409), moving plate B (410), and power screw B (411); The two ends of the connecting block C (401) are slidably installed in the grooves inside the fixed plate A (102); one side of the two lifting rod groups A (402) are respectively movably installed in the grooves of the left and right side baffles of the connecting block C (401), and the other side of the lifting rod group A (402) is movably installed in the groove inside the connecting plate A (403); the power screw A (405) is rotatably installed in the hole of the baffle on the side of the connecting block C (401), and one side of the power screw A (405) is threadedly installed in the threaded hole of the moving plate A (406); the moving plate A (406) is slidably installed in the groove of the connecting block C (401), and the moving plate A (406) is connected to the lifting rod group A (402) on one side; the motor of the power group E (407) is fixedly installed in the groove of the baffle in the middle of the connecting block C (401).

7. The automatic polishing device for the inner wall of a rectangular metal tube according to claim 6, characterized in that, The U-shaped plate (408) is fixedly installed at the bottom of the grooved pipe (101); the two ends of the lifting rod group B (409) are respectively movably installed in the grooves of the baffles on both sides of the U-shaped plate (408) and in the groove of the lower baffle of the connecting block C (401).

8. The automatic polishing device for the inner wall of a rectangular metal tube according to claim 6, characterized in that, The movable plate B (410) is rotatably mounted on a shaft on one side of the lower end of the lifting rod assembly B (409); the power screw B (411) is rotatably mounted in the hole of the inner baffle of the U-shaped plate (408), the power screw B (411) is threadedly mounted in the threaded hole of the movable plate B (410), and a motor is mounted on the power screw B (411) to drive the power screw B (411) to rotate.

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