A pressure vessel weld grinding and cleaning device

Abstract

The present invention relates to the technical field of magnetic wall climbing grinding, and in particular to a pressure vessel weld grinding and cleaning device, comprising a main frame, the lower end of which is fixedly connected to four symmetrically arranged support frames, the lower ends of the four support frames are provided with a moving mechanism for ensuring that the device can move on the inner wall of the tank body, the moving mechanism comprises four support bodies respectively fixedly connected to the lower ends of the support frames, rollers are respectively rotatably arranged in the four support bodies, and the side of the support plate is provided with a grinding and scraping mechanism for grinding, scraping and collecting impurities on the inner wall of the cylindrical tank body; the fourth electric telescopic rod is extended and retracted according to the arc surface of the inner wall, so that the lower end of the scraper completely removes the stains on the inner wall surface, and the extension and retraction of the fourth electric telescopic rod can scrape impurities from columnar structures of different curvatures to prevent the heat released when the device is polished from igniting stains.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic wall climbing grinding, and in particular to a pressure vessel weld grinding and cleaning device. Background Art

[0002] During the comprehensive inspection process of pressure vessels, it is necessary to shut down and drain the medium in the tank. However, for storage tanks containing hazardous media, opening the tanks to drain the liquid will delay the production rhythm and have a long construction period. In order to conduct a comprehensive inspection of the tank body, ultrasonic detection technology is usually used. The outer surface of the tank needs to be polished until the metallic luster is exposed. Generally, the storage tank is in the shape of a cylindrical structure, and the tank body is made of carbon steel or stainless steel. There are many weld joints on the tank body, and there are many welding points, rust spots and oxide scales. It cannot be directly fitted with the detection equipment and needs to be polished. Before polishing, some flammable and explosive liquids are stored in the tank body. The liquid residue in the weld needs to be completely cleaned up, and then the tank body is polished and trimmed. Therefore, a pressure vessel weld grinding and cleaning device is needed. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a pressure vessel weld grinding and cleaning device.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a pressure vessel weld grinding and cleaning device, including a main frame, the lower end of the main frame is fixedly connected with four symmetrically arranged support frames, the lower ends of the four support frames are provided with a moving mechanism that ensures that the device can move on the inner wall of the tank body, the moving mechanism includes four support bodies respectively fixedly connected to the lower ends of the support frames, and rollers are rotatably arranged in the four support bodies, and a lifting mechanism is arranged at the upper end of the main frame, and the lifting mechanism includes a bearing plate fixedly arranged at the upper end of the main frame, and a second motor is arranged at the upper end of the bearing plate through a fixing plate, and two transmission belts are closely arranged on the side of the transmission shaft of the second motor, and two symmetrically placed fixed plates are rotatably arranged on the upper end surface of the bearing plate, and the sides of the two fixed plates are closely arranged with the transmission belts, respectively, and the lower ends of the two fixed plates are respectively fixedly connected with first threaded rods, and the sides of the two first threaded rods are respectively provided with matching rings through threaded matching, and the sides of the two matching rings are fixedly connected with support plates, and the sides of the support plates are provided with grinding and scraping mechanisms for grinding and scraping the inner wall of the cylindrical tank body and collecting impurities.

[0005] Preferably, the side surfaces of the four support bodies are respectively fixedly connected with the first motors, the transmission shaft ends of the four first motors are respectively fixedly connected with the rollers, the lower end of the main frame is fixedly connected with two symmetrically arranged connecting frames, and the lower ends of the two connecting frames are fixedly connected with a plurality of magnets.

[0006] Preferably, the grinding and scraping mechanism includes a first fixed body fixedly arranged on the inner side of the support plate, the lower end of the first fixed body is fixedly connected to the first electric telescopic rod, the telescopic end of the first electric telescopic rod is fixedly connected to the arc surface grinding and collecting mechanism, the arc surface grinding and collecting mechanism includes a second fixed body fixedly connected to the telescopic end of the first electric telescopic rod, a first limiting groove is opened at the lower end of the second fixed body, a third motor is fixedly connected in the first limiting groove, and the transmission shaft end of the third motor is fixedly connected to the third fixed body.

[0007] Preferably, a fourth limiting groove is provided at the lower end of the third fixed body, and a plurality of equally spaced second electric telescopic rods are fixedly connected in the fourth limiting groove, and a plurality of polishing airbags are respectively fixedly connected to the telescopic ends of the plurality of second electric telescopic rods, and a plurality of second air pumps communicated with the polishing airbags are respectively fixedly connected to the upper side surfaces of the plurality of polishing airbags, and a plurality of pressure sensors are respectively fixedly connected to the lower ends of the plurality of polishing airbags.

[0008] Preferably, the lower end of the third fixed body is provided with two symmetrically arranged through holes, the first air pump is fixedly connected to the two through holes respectively, the filter plates are fixedly connected to the two through holes respectively, and the upper end of the third fixed body is fixedly connected with two containing shells respectively, and the two containing shells are provided with cavities respectively.

[0009] Preferably, the lower ends of the two cavities are filter structures, and the lower end of the third fixed body is provided with an air outlet hole at a position close to the containing shell. The air outlet ends of the two first air pumps are respectively fixedly connected with air pipes, and the other ends of the two air pipes are respectively connected to the containing shell.

[0010] Preferably, a second limiting groove is provided at the lower end of the third fixed body, a plurality of circumferentially arranged springs are fixedly connected in the second limiting groove, a flexible ring that slides with the second limiting groove is fixedly connected to the lower ends of the plurality of springs, and a placement groove is provided at the lower end of the third fixed body, a plurality of equidistantly arranged smoothness detectors are fixedly connected in the placement groove.

[0011] Preferably, an empty groove is provided at the lower end of the second fixed body, a third electric telescopic rod is fixedly connected in the empty groove, the telescopic end of the third electric telescopic rod is fixedly connected to a fourth fixed body, a third limiting groove is provided at the lower end of the fourth fixed body, a fourth motor is fixedly connected in the third limiting groove, a second threaded rod is fixedly connected to the transmission shaft end of the fourth motor, a limiting body is provided on the side surface of the second threaded rod through threaded cooperation, and the side surface of the limiting body is slidably cooperated with the third limiting groove.

[0012] Preferably, the lower end of the limiting body is fixedly connected to a fourth electric telescopic rod, the telescopic end of the fourth electric telescopic rod is fixedly connected to a scraper, the third limiting groove is fixedly connected to a fifth motor, and the transmission shaft end of the fifth motor is fixedly connected to a cleaning roll.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The fourth motor drives the second threaded rod to rotate, and the second threaded rod cooperates to drive the limiting body to move along the third limiting groove. At the same time, the fourth electric telescopic rod is extended and retracted according to the arc surface of the inner wall, so that the lower end of the scraper completely removes the stains on the inner wall surface. The impurities can be scraped off the column structures with different arcs through the extension and retraction of the fourth electric telescopic rod, so as to prevent the heat released during the grinding of the device from igniting the stains, thereby improving the reliability of the device;

[0015] The second electric telescopic rod in the fourth limiting groove at the lower end of the third fixed body contracts according to the pressure sensor, ensuring that the grinding airbag maintains a certain pressure to grind the weld of the tank body, thereby completely grinding the inner wall of the tank body. During grinding, the pressure applied by the grinding airbag to the inner wall can be controlled to prevent excessive grinding of the tank body in the grinding airbag, thereby improving the safety of the device. During grinding, the first air pump is started, and impurities at the grinding site remain under the third fixed body under the obstruction of the flexible ring. After that, the first air pump absorbs the residue into the containing shell for collection. The filter plate can prevent large impurities from damaging the first air pump, prevent the residue from rubbing against the inner wall of the tank body during grinding, and prevent the smooth weld from being scratched after grinding, thereby improving the smoothness of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is an overall cross-sectional view of the present invention;

[0018] Figure 3 Partial cross-section of the present invention Figure 1 ;

[0019] Figure 4 Partial cross-section of the present invention Figure 2 ;

[0020] Figure 5 Partial cross-section of the present invention Figure 3 ;

[0021] Figure 6 Partial cross-section of the present invention Figure 4 ;

[0022] Figure 7 for Figure 4 A magnified image of point A;

[0023] Figure 8 for Figure 6 Enlarged view of point B.

[0024] 1. Main frame; 2. Moving mechanism; 3. Lifting mechanism; 4. Grinding and scraping mechanism; 11. Support frame; 21. Connecting frame; 22. Support body; 23. Roller; 24. Magnet; 25. First motor; 31. Second motor; 32. Transmission belt; 33. Fixed plate; 34. First threaded rod; 35. Support plate; 36. Matching ring; 37. Loading plate; 41. First fixed body; 42. First electric telescopic rod; 43. Arc surface grinding and collecting mechanism; 431. Second fixed body; 432. First limiting groove; 433. Third fixed body; 434. Placement groove; 435. Smoothness detector; 436. Through hole; 437. Third motor; 438. Second electric telescopic rod; 43 9. grinding airbag; 4310. empty slot; 4311. third electric telescopic rod; 4312. fourth fixed body; 4313. second threaded rod; 4315. first air pump; 4316. air pipe; 4317. containing shell; 4318. cavity; 4319. filter plate; 4320. air outlet; 4321. limiting body; 4322. fourth electric telescopic rod; 4323. scraper; 4324. fourth motor; 4325. pressure sensor; 4326. second air pump; 4327. second limiting slot; 4328. spring; 4329. flexible ring; 4330. third limiting slot; 4331. fifth motor; 4332. cleaning roll; 4333. fourth limiting slot. DETAILED DESCRIPTION

[0025] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0026] See also Figure 1-Figure 8 A pressure vessel weld grinding and cleaning device comprises a main frame 1, the lower end of which is fixedly connected with four symmetrically arranged support frames 11, and the lower ends of the four support frames 11 are provided with a moving mechanism 2 for ensuring that the device can move on the inner wall of the tank body.

[0027] In this embodiment, the moving mechanism 2 includes four supporting bodies 22 respectively fixedly connected to the lower ends of the supporting frame 11 , and rollers 23 are rotatably arranged in the four supporting bodies 22 .

[0028] The side surfaces of the four support bodies 22 are respectively fixedly connected with first motors 25, and the transmission shaft ends of the four first motors 25 are respectively fixedly connected with rollers 23. The lower end of the main frame 1 is fixedly connected with two symmetrically arranged connecting frames 21, and the lower ends of the two connecting frames 21 are fixedly connected with a plurality of magnets 24.

[0029] Specifically, the device is tightly attached to the inner wall under the attraction of the magnet 24, and then the four first motors 25 are started, and the four first motors 25 respectively drive the rollers 23 to rotate, thereby driving the device to move along the weld.

[0030] In this embodiment, a lifting mechanism 3 is provided at the upper end of the main frame 1, and the lifting mechanism 3 includes a supporting plate 37 fixedly provided at the upper end of the main frame 1, and a second motor 31 is provided at the upper end of the supporting plate 37 through a fixing plate, and two transmission belts 32 are tightly provided on the side of the transmission shaft of the second motor 31, and two symmetrically placed fixing plates 33 are rotatably provided on the upper end surface of the supporting plate 37, and the side surfaces of the two fixing plates 33 are tightly provided with the transmission belts 32 respectively, and the lower ends of the two fixing plates 33 are fixedly connected with first threaded rods 34 respectively, and the side surfaces of the two first threaded rods 34 are respectively provided with matching rings 36 through threaded matching, and the side surfaces of the two matching rings 36 are fixedly connected with support plates 35.

[0031] Specifically, the second motor 31 drives the two transmission belts 32 to rotate, the transmission belts 32 drive the fixing plate 33 and the first threaded rod 34 to rotate, and the first threaded rod 34 cooperates to drive the supporting plate 35 to move up and down until the lower end of the second fixing body 431 moves to a position close to the inner wall.

[0032] In this embodiment, a grinding and scraping mechanism 4 for grinding and scraping the inner wall of the cylindrical tank and collecting impurities is disposed on the side of the support plate 35 .

[0033] The grinding and scraping mechanism 4 includes a first fixed body 41 fixedly arranged on the inner side of the support plate 35, the lower end of the first fixed body 41 is fixedly connected to a first electric telescopic rod 42, the telescopic end of the first electric telescopic rod 42 is fixedly connected to a curved surface grinding and collecting mechanism 43, the curved surface grinding and collecting mechanism 43 includes a second fixed body 431 fixedly connected to the telescopic end of the first electric telescopic rod 42, a first limiting groove 432 is opened at the lower end of the second fixed body 431, a third motor 437 is fixedly connected in the first limiting groove 432, and the transmission shaft end of the third motor 437 is fixedly connected to the third fixed body 433.

[0034] A fourth limiting groove 4333 is provided at the lower end of the third fixed body 433, and a plurality of equally spaced second electric telescopic rods 438 are fixedly connected in the fourth limiting groove 4333, and a plurality of polishing airbags 439 are respectively fixedly connected to the telescopic ends of the plurality of second electric telescopic rods 438, and a plurality of second air pumps 4326 communicated with the polishing airbags 439 are respectively fixedly connected to the upper side surfaces of the plurality of polishing airbags 439, and a plurality of pressure sensors 4325 are respectively fixedly connected to the lower ends of the plurality of polishing airbags 439.

[0035] The lower end of the third fixed body 433 is provided with two symmetrically arranged through holes 436, and the first air pump 4315 is fixedly connected to the two through holes 436 respectively, and the filter plate 4319 is fixedly connected to the two through holes 436 respectively. The upper end of the third fixed body 433 is fixedly connected with two accommodating shells 4317, and the two accommodating shells 4317 are respectively provided with a cavity 4318.

[0036] The lower ends of the two cavities 4318 are filter structures, and the lower end of the third fixed body 433 is penetrated by an air outlet hole 4320 at a position close to the containing shell 4317. The air outlet ends of the two first air pumps 4315 are respectively fixedly connected with air pipes 4316, and the other ends of the two air pipes 4316 are respectively communicated with the containing shell 4317.

[0037] A second limiting groove 4327 is formed at the lower end of the third fixed body 433, and a plurality of circumferentially arranged springs 4328 are fixedly connected in the second limiting groove 4327, and a flexible ring 4329 that slidably cooperates with the second limiting groove 4327 is fixedly connected at the lower ends of the plurality of springs 4328. A placement groove 434 is formed at the lower end of the third fixed body 433, and a plurality of equidistantly arranged smoothness detectors 435 are fixedly connected in the placement groove 434.

[0038] A hollow groove 4310 is provided at the lower end of the second fixed body 431, and a third electric telescopic rod 4311 is fixedly connected in the hollow groove 4310. The telescopic end of the third electric telescopic rod 4311 is fixedly connected to a fourth fixed body 4312. A third limiting groove 4330 is provided at the lower end of the fourth fixed body 4312. A fourth motor 4324 is fixedly connected in the third limiting groove 4330. A second threaded rod 4313 is fixedly connected to the transmission shaft end of the fourth motor 4324. A limiting body 4321 is provided on the side surface of the second threaded rod 4313 through threaded cooperation. The side surface of the limiting body 4321 is slidably cooperated with the third limiting groove 4330.

[0039] The lower end of the limiting body 4321 is fixedly connected to the fourth electric telescopic rod 4322, the telescopic end of the fourth electric telescopic rod 4322 is fixedly connected to the scraper 4323, the third limiting groove 4330 is fixedly connected to the fifth motor 4331, and the transmission shaft end of the fifth motor 4331 is fixedly connected to the cleaning roll 4332.

[0040] Specifically, the fourth motor 4324 drives the second threaded rod 4313 to rotate, and the second threaded rod 4313 cooperates to drive the limiting body 4321 to move along the third limiting groove 4330. At the same time, the fourth electric telescopic rod 4322 is extended and retracted according to the arc surface of the inner wall, so that the lower end of the scraper 4323 completely removes the stains on the inner wall surface. The extension and retraction of the fourth electric telescopic rod 4322 can scrape impurities from column structures with different curvatures, thereby preventing the heat released during grinding of the device from igniting stains and improving the reliability of the device.

[0041] When in use, the device is placed at the weld of the inner wall of the tank body, and the device is tightly attached to the inner wall under the attraction of the magnet 24. Then, the four first motors 25 are started, and the four first motors 25 respectively drive the rollers 23 to rotate, thereby driving the device to move along the weld. While moving, the second motor 31 is started, and the second motor 31 drives the two transmission belts 32 to rotate, and the transmission belts 32 drive the fixing plate 33 and the first threaded rod 34 to rotate, and the first threaded rod 34 cooperates to drive the support plate 35 to move up and down until the lower end of the second fixing body 431 moves to a position close to the inner wall. The fourth motor 4324 is then started, and the fourth motor 4324 drives the second threaded rod 4313 to rotate, and the second threaded rod 4313 cooperates to drive the limiting body 4321 to move along the third limiting groove 4330, and at the same time the fourth electric telescopic rod 4322 is telescoped according to the arc surface of the inner wall, so that the lower end of the scraper 4323 completely removes the stains on the surface of the inner wall, and the extension and retraction of the fourth electric telescopic rod 4322 can be used to scrape impurities from column structures with different curvatures, so as to prevent the heat released during the grinding of the device from igniting the stains, thereby improving the reliability of the device.

[0042] At the same time, the third motor 437 is started, and the third motor 437 drives the third fixed body 433 to rotate. The second electric telescopic rod 438 in the fourth limiting groove 4333 at the lower end of the third fixed body 433 is contracted according to the pressure sensor 4325, and the grinding airbag 439 is kept to ensure a certain pressure to grind the weld of the tank body, so that the inner wall of the tank body is completely polished. During grinding, the pressure applied by the grinding airbag 439 to the inner wall can be controlled to prevent the tank body in the grinding airbag 439 from being over-grinded, thereby improving the safety of the device. During grinding, the first air pump 4315 is started, and the impurities at the grinding site are blocked by the flexible ring 4329 and remain under the third fixed body 433. Then, the first air pump 4315 absorbs the residue into the containing shell 4317 for collection. The filter plate 4319 can prevent large impurities from damaging the first air pump 4315, prevent the residue from rubbing against the inner wall of the tank body during grinding, and prevent the smooth weld from being scratched after grinding, thereby improving the smoothness of the device.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A pressure vessel weld grinding and cleaning device, comprising a main frame (1), characterized in that: The lower end of the main frame (1) is fixedly connected to four symmetrically arranged support frames (11), and the lower ends of the four support frames (11) are provided with a moving mechanism (2) for ensuring that the device can move inside the inner wall of the tank body, and the moving mechanism (2) comprises four support bodies (22) respectively fixedly connected to the lower ends of the support frames (11), and rollers (23) are rotatably arranged in the four support bodies (22). The upper end of the main frame (1) is provided with a lifting mechanism (3), and the lifting mechanism (3) comprises a bearing plate (37) fixedly arranged on the upper end of the main frame (1), and the upper end of the bearing plate (37) is provided with a second motor (31) through a fixing plate, and the side surface of the transmission shaft of the second motor (31) is closely provided with two transmission belts ( 32), the upper end surface of the bearing plate (37) is rotatably provided with two symmetrically placed fixing plates (33), the side surfaces of the two fixing plates (33) are respectively arranged in close contact with the transmission belt (32), the lower ends of the two fixing plates (33) are respectively fixedly connected with first threaded rods (34), the side surfaces of the two first threaded rods (34) are respectively provided with matching rings (36) through thread matching, the side surfaces of the two matching rings (36) are fixedly connected with support plates (35), the side surfaces of the support plates (35) are provided with grinding and scraping mechanisms (4) for grinding and scraping the inner wall of the cylindrical tank and collecting impurities, the grinding and scraping mechanisms (4) comprising a first fixing body (41) fixedly arranged on the inner side of the support plate (35), the first fixing body (41) The lower end of the fixed body (41) is fixedly connected to a first electric telescopic rod (42); the telescopic end of the first electric telescopic rod (42) is fixedly connected to a curved surface grinding and collecting mechanism (43); the curved surface grinding and collecting mechanism (43) comprises a second fixed body (431) fixedly connected to the telescopic end of the first electric telescopic rod (42); the lower end of the second fixed body (431) is provided with a first limiting groove (432); a third motor (437) is fixedly connected in the first limiting groove (432); a transmission shaft end of the third motor (437) is fixedly connected to the third fixed body (433); the lower end of the second fixed body (431) is provided with an empty groove (4310); a third motor (437) is fixedly connected in the empty groove (4310); An electric telescopic rod (4311), the telescopic end of the third electric telescopic rod (4311) is fixedly connected to a fourth fixed body (4312), the lower end of the fourth fixed body (4312) is provided with a third limiting groove (4330), a fourth motor (4324) is fixedly connected in the third limiting groove (4330), a transmission shaft end of the fourth motor (4324) is fixedly connected to a second threaded rod (4313), a limiting body (4321) is provided on the side of the second threaded rod (4313) through threaded matching, the side of the limiting body (4321) is slidably matched with the third limiting groove (4330), and the lower end of the limiting body (4321) is fixedly connected to the fourth electric telescopic rod (4322),The telescopic end of the fourth electric telescopic rod (4322) is fixedly connected to a scraper (4323), the third limiting groove (4330) is fixedly connected to a fifth motor (4331), and the transmission shaft end of the fifth motor (4331) is fixedly connected to a cleaning roll (4332).

2. A pressure vessel weld grinding and cleaning device according to claim 1, characterized in that: The side surfaces of the four support bodies (22) are respectively fixedly connected to first motors (25), and the transmission shaft ends of the four first motors (25) are respectively fixedly connected to rollers (23). The lower end of the main frame (1) is fixedly connected to two symmetrically arranged connecting frames (21), and the lower ends of the two connecting frames (21) are fixedly connected to a plurality of magnets (24).

3. The pressure vessel weld grinding and cleaning device according to claim 1, characterized in that: A fourth limiting groove (4333) is provided at the lower end of the third fixed body (433), and a plurality of second electric telescopic rods (438) arranged at equal intervals are fixedly connected in the fourth limiting groove (4333), and the telescopic ends of the plurality of second electric telescopic rods (438) are respectively fixedly connected to a plurality of polishing airbags (439), and the upper side surfaces of the plurality of polishing airbags (439) are respectively fixedly connected to a plurality of second air pumps (4326) in communication with the polishing airbags (439), and the lower ends of the plurality of polishing airbags (439) are respectively fixedly connected to pressure sensors (4325).

4. A pressure vessel weld grinding and cleaning device according to claim 1, characterized in that: The lower end of the third fixed body (433) is provided with two symmetrically arranged through holes (436), the two through holes (436) are respectively fixedly connected with a first air pump (4315), the two through holes (436) are respectively fixedly connected with a filter plate (4319), and the upper end of the third fixed body (433) is respectively fixedly connected with two accommodating shells (4317), and the two accommodating shells (4317) are respectively provided with a cavity (4318).

5. A pressure vessel weld grinding and cleaning device according to claim 4, characterized in that: The lower ends of the two cavities (4318) are filter structures, and the lower end of the third fixed body (433) is provided with an air outlet hole (4320) at a position close to the containing shell (4317). The air outlet ends of the two first air pumps (4315) are respectively fixedly connected to the air supply pipes (4316), and the other ends of the two air supply pipes (4316) are respectively communicated with the containing shell (4317).

6. The pressure vessel weld grinding and cleaning device according to claim 1, characterized in that: A second limiting groove (4327) is formed at the lower end of the third fixed body (433), a plurality of circumferentially arranged springs (4328) are fixedly connected in the second limiting groove (4327), a flexible ring (4329) slidably matched with the second limiting groove (4327) is fixedly connected at the lower ends of the plurality of springs (4328), a placement groove (434) is formed at the lower end of the third fixed body (433), a plurality of equidistantly arranged smoothness detectors (435) are fixedly connected in the placement groove (434).

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