A fluorine-lined steel pipe inner cavity polisher

Abstract

This application relates to a grinding machine for the inner cavity of fluoropolymer-lined steel pipes, belonging to the field of pipe grinding and cleaning technology. It mainly consists of a frame shell, a walking device, an adaptive device, a sandblasting device, and a control box. The sandblasting device is the core component of this product, efficiently and accurately cleaning the inner wall of the pipe, improving work efficiency and equipment stability, resulting in excellent performance when cleaning the inner wall of pipes. The sandblasting head is set at a 45-degree angle, making it easier for the equipment to grind and clean the inner wall of the pipe. Simultaneously, the air jet head blows the debris under cleaning into the pipe, preventing debris and dust from damaging the equipment. The rectangular frame design and spring elasticity adjustment mechanism in the walking device ensure stable movement even in complex terrain. The design of the driven telescopic component allows the device to adapt to changes in the inner wall of the pipe, effectively preventing debris from affecting the normal operation of the grinding machine during the grinding process.

Description

Technical Field

[0001] This application relates to the field of pipeline grinding and cleaning technology, and in particular to a grinding machine for the inner cavity of fluoropolymer-lined steel pipes. Background Technology

[0002] With increasing demands for the quality of steel pipe cavities in the industrial sector, internal cavity grinding technology is constantly evolving. Existing grinding machines mostly employ rotary grinding heads for internal cavity processing; however, considering the unique characteristics of the circular diameter of fluoropolymer-lined steel pipes, related technologies still require improvement. When grinding the inner wall of pipes, internal cavity grinding machines typically use a motor to drive the grinding head to rotate. However, when processing fluoropolymer-lined steel pipes, these machines often suffer from problems due to improper grinding head design. This results in grinding debris and dust falling onto the grinding equipment or flying out and colliding with the machine body, causing damage. Furthermore, this debris and dust can fall into the grinding machine's path, preventing it from moving forward or reducing grinding accuracy. Summary of the Invention

[0003] In order to avoid the waste chips during the grinding process affecting the normal operation of the grinding machine and thus improve the grinding accuracy, this application provides a grinding machine for the inner cavity of fluoropolymer-lined steel pipes.

[0004] This application provides a grinding machine for the inner cavity of fluoropolymer-lined steel pipes, which adopts the following technical solution: A grinding machine for the inner cavity of a fluoropolymer-lined steel pipe includes a frame shell, a walking device, an adaptive device, a sandblasting device, and a control box. The walking device, the adaptive device, the sandblasting device, and the control box are all mounted on the frame shell. A protective plate is provided on the side of the frame shell near the output end of the nozzle assembly. The sandblasting device includes a sandblasting mechanism and an adjustment mechanism, and the sandblasting mechanism includes a nozzle assembly; The nozzle assembly includes an air jet head, a sandblasting head, and a metal housing; The adjustment mechanism includes a sand-gas conversion component, a conversion drive component, and an angle adjustment component; The sand-gas conversion assembly includes steel ball spokes, spherical steel balls, an adjusting metal tube, and a rubber sleeve joint. The steel ball spokes are fixedly installed inside the jet head, located in front of the jet head outlet. The steel ball spokes are fixedly connected to the inner wall of the jet head. The spherical steel balls are located at the center of the steel ball spokes and on the axis of the jet head. The rubber sleeve is fitted onto the end of the adjusting metal tube near the spherical steel ball. The rubber sleeve includes an arc-shaped section and a sealing section. The arc-shaped section has a circular hole to form a circular air hole. The side of the adjusting metal tube is provided with four through holes to form a first adjusting hole and a second adjusting hole. The first adjusting hole includes two through holes close to the rubber sleeve joint, and the second adjusting hole includes two through holes away from the rubber sleeve joint. A partition is formed between the first adjusting hole and the second adjusting hole. The conversion drive assembly includes a socket shell, a motor housing, a motor, and a snap-fit ​​sleeve. The socket shell is fixedly connected to the metal housing. The snap-fit ​​sleeve is disposed inside the socket shell and is fitted onto the end of the adjusting metal tube away from the rubber sleeve joint. The snap-fit ​​sleeve is also provided with a protruding part. The side of the sleeve housing is provided with a through groove to form an adjustment slide groove. The protruding part extends from the adjustment slide groove to the outside of the sleeve housing. One end of the protruding part extending out of the sleeve housing is provided with a threaded hole. The motor housing is fixedly installed outside the sleeve housing. A screw is fixedly installed on the output shaft of the motor.

[0005] By adopting the above technical solution, the sand-air conversion component uses a design of steel ball spokes and spherical steel balls, combined with rubber sleeve joints and adjusting metal pipes, to achieve flexibility in switching between sandblasting and air jetting, and improve sealing. The conversion drive component, through components such as motors and snap-fit ​​sleeves, enables rapid adjustment between sandblasting and air jetting, switching modes between the two. This allows the equipment to perform grinding and cleaning through sandblasting, while the air jet head blows the debris under the cleaning process out of the pipeline, preventing damage to the equipment from debris and dust. This also facilitates the movement of the equipment within the pipeline and avoids falling debris affecting the movement path.

[0006] In one specific implementation, the metal housing is configured as a cylindrical metal housing, the jet head is disposed at the end of the metal housing along the length direction of the metal housing, and two sandblasting heads are provided, both of which are inclined at 45 degrees away from the jet head.

[0007] By adopting the above technical solution, the metal shell can enhance the strength of the machine body and reduce the probability of equipment damage. The 45-degree tilt design makes it easier for the sandblasting head to grind and clean the inner wall of the pipe, which makes up for the disadvantage of the direct fall of waste chips when using grinding equipment. It allows the waste chips that fall off the grinding to fall as far as possible in front of the equipment, and work with the jet head to blow the sand and waste chips out of the pipe.

[0008] In one specific implementation, the sealing section is sleeved with the adjusting metal tube, and a circular friction ring is provided between the sealing section and the metal shell. Hard plastic balls are hot-melt welded to the surface of the friction ring, and the hard plastic balls are evenly distributed along the outer surface of the friction ring.

[0009] By adopting the above technical solution, the friction ring is mainly used to prevent gas from leaking out between the regulating metal tube and the metal shell during jetting. The hard plastic ball directly contacts the metal shell, reducing friction between the friction ring and the metal shell and facilitating the movement of the friction ring relative to the metal shell. When the sandblasting head and jetting head operate simultaneously, a large amount of sand and gas flows through the rubber tube, causing the regulating metal tube to expand. Due to the deformation of the friction ring, the hard plastic ball will sink into the friction ring during compression, thereby improving the sealing performance of the friction ring and achieving an adaptive effect. It can self-adjust according to the direction of the force acting on the inner wall of the metal shell when the regulating metal tube moves. When the flow rate increases, the sealing performance improves; when the flow rate decreases, the contact area between the hard plastic ball and the inner wall of the metal shell increases, improving the movement flexibility of the regulating metal tube and making gear shifting faster.

[0010] In one specific implementation scheme, the end of the adjusting metal tube away from the rubber sleeve joint is connected to a corrugated tube. The outer layer of the corrugated tube is a metal tube, and multiple rubber tube corrugated tubes are arranged inside the corrugated tube. The number of rubber tube corrugated tubes is set to five, which are respectively fixedly connected to the four through holes of the first adjusting hole and the second adjusting hole, and fixedly connected to the arc-shaped section of the rubber sleeve joint.

[0011] By adopting the above technical solution, a rubber bellows is set for each adjustment hole, so that each passage can operate independently without interference. When one passage is damaged, the others can still operate normally, which can improve the stability of the equipment.

[0012] In one specific implementation, the angle adjustment assembly includes an angle adjustment motor, a gear ring, and an inner slide rail. The inner slide rail is formed on the inner wall of the frame housing. The gear ring is rotatably disposed inside the inner slide rail. A half-stroke stop is provided on the gear ring. The angle adjustment motor is also fixedly disposed on the inner wall of the frame housing. The angle adjustment motor and the gear ring are driven by gear meshing. A square housing is provided outside the angle adjustment motor.

[0013] By adopting the above technical solution, the angle adjustment motor, in conjunction with the gear ring, can drive the gear ring to rotate. A half-stroke stop is provided on the gear ring, allowing it to rotate only halfway at a time. With two sandblasting heads, a half-stroke rotation of the gear ring is sufficient to complete the sandblasting and polishing effect of the entire inner wall of the pipe. The square housing design improves the protection of the angle adjustment motor.

[0014] In one specific implementation, the walking device includes a walking fixed seat and a wheel fixing plate. The walking fixed seat is fixedly mounted on the frame shell, and the wheel fixing plate is located at the end of the walking fixed seat away from the frame shell. The adaptive device is located between the wheel fixing plate and the walking fixed seat. The wheel fixing plate, the walking fixed seat, and the adaptive device together form a rectangular frame. A fixing handle is provided on the wheel fixing plate at the end away from the frame shell, and a track wheel and a drive motor for driving the track wheel are mounted on the fixing handle.

[0015] In one specific implementation scheme, the adaptive device includes an elastic telescopic component and a driven telescopic component. The elastic telescopic component includes a first sleeve and a second sleeve, which are slidably connected. The interiors of the first sleeve and the second sleeve are hollow to form an inner cavity, and an inner cavity spring is provided inside the first sleeve and the second sleeve.

[0016] In one specific implementation, a through hole is formed on the inner wall of the cavity to create an air hole.

[0017] In one specific implementation scheme, the driven telescopic component includes a fixed small sleeve and a telescopic large sleeve. The fixed small sleeve is fixedly mounted on the pulley fixing plate by bolts, and the telescopic large sleeve is fixedly mounted on the walking fixing seat. The fixed small sleeve is provided with a telescopic column at one end corresponding to the telescopic large sleeve, and the telescopic large sleeve is provided with a telescopic groove at one end near the fixed small sleeve. The telescopic column is slidably inserted into the telescopic groove.

[0018] By adopting the above technical solution, and thanks to the rectangular frame design and spring force adjustment mechanism, the walking device can maintain a stable walking state even when facing complex terrain. The driven telescopic components of the adaptive device allow the device to adapt to changes in the inner wall of the pipe, greatly improving its applicability. The drive motor, combined with a precise control system, enables the track wheels to respond quickly to commands and achieve efficient walking. The vent design helps the device to exhaust and dissipate heat during movement, extending its service life.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. The sandblasting device includes a sandblasting mechanism and an adjustment mechanism. The nozzle assembly in the sandblasting mechanism includes an air jet head, a sandblasting head, and a metal casing. The air jet head and sandblasting head enable the equipment to both sandblast and polish during the cleaning process, and also blow away waste debris through the air jet head, keeping the inside of the pipeline clean.

[0020] 2. The adjustment mechanism includes a sand-air conversion component, a conversion drive component, and an angle adjustment component. The sand-air conversion component uses steel ball spokes and spherical steel balls, along with rubber sleeve joints and adjusting metal pipes, to achieve flexibility in switching between sandblasting and air jetting. The conversion drive component, through components such as a motor and snap-fit ​​sleeves, enables rapid adjustment between sandblasting and air jetting.

[0021] 3. The sandblasting head and air jet nozzle are designed with a 45-degree angle to facilitate grinding and cleaning of the pipe's inner wall. Simultaneously, the air jet nozzle blows away debris from the pipe, preventing damage to the equipment from debris and dust. Attached Figure Description

[0022] Figure 1 This is an overall schematic diagram of an embodiment of this application; Figure 2 and Figure 3 This is a schematic diagram of the specific structure of the walking device; Figure 4 and Figure 5 This is an exploded view of the specific structure of the adaptive device; Figure 6 This is an exploded view of the angle adjustment component; Figures 7-10 This is a schematic diagram of the specific structure of the sandblasting device.

[0023] Explanation of reference numerals in the attached drawings: 11. Track wheel; 12. Drive motor; 13. Traveling base; 14. Pulley fixing plate; 15. Fixing handle; 21. Elastic telescopic assembly; 211. Inner spring; 212. Outer spring; 213. First sleeve; 214. Second sleeve; 215. Air vent; 22. Driven telescopic assembly; 221. Fixed small sleeve; 222. Telescopic column; 223. Telescopic large sleeve; 224. Telescopic groove; 31. Nozzle assembly; 32. Sandblasting head; 33. Air jet head; 34. Metal outer shell; 41. Steel ball spokes; 42. Spherical steel ball; 43. Adjustment. Metal pipe; 431, First adjusting hole; 432, Second adjusting hole; 433, Partition; 434, Corrugated pipe; 44, Rubber sleeve joint; 441, Arc-shaped section; 442, Round air hole; 443, Sealing section; 444, Friction rubber ring; 445, Hard plastic ball; 51, Sleeve shell; 511, Adjusting slide; 52, Motor housing; 53, Snap-fit ​​sleeve; 531, Protrusion; 61, Angle adjusting motor; 62, Gear ring; 621, Half-stroke stop; 622, Gear ring spokes; 63, Inner slide; 64, Square housing; 7, Control box; 10, Frame housing; 100, Protective plate. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0025] In the description of the invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the 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 limiting the invention.

[0026] This application discloses a grinding machine for the inner cavity of a fluoropolymer-lined steel pipe, referring to... Figure 1 and Figure 2 The system includes a frame housing 10, a walking device, an adaptive device, a sandblasting device, and a control box 7. The control box 7 houses a control unit for adjusting and controlling the overall equipment. The walking device, adaptive device, sandblasting device, and control box are all mounted on the frame housing 10. Four walking devices are arranged circumferentially along the frame housing 10. Each walking device includes a walking base 13 and a wheel fixing plate 14. The walking base 13 is fixedly mounted on the frame housing 10. The wheel fixing plate 14 is located at the end of the walking base 13 furthest from the frame housing 10. The adaptive device is located between the wheel fixing plate 14 and the walking base 13. The wheel fixing plate 14, the walking base 13, and the adaptive device together form a rectangular frame. The adaptive device connects the wheel fixing plate 14 and the walking base 13. A fixing handle 15 is provided on the end of the pulley fixing plate 14 that is away from the frame housing 10. Two fixing handles 15 are arranged opposite each other along the length of the pulley fixing plate 14. Track wheels 11 and drive motors 12 that drive track wheels 11 are installed on the fixing handles 15.

[0027] Reference Figures 3-5The adaptive device serves to dampen shocks and stabilize the machine body. When the track wheel 11 passes over an obstructing object, the movement between the track wheel fixing plate 14 and the traveling fixed seat 13 is controlled by the adaptive device, which includes a spring-loaded telescopic assembly 21 and a driven telescopic assembly 22. The spring-loaded telescopic assembly 21 includes a first sleeve 213 and a second sleeve 214. The first sleeve 213 and the second sleeve 214 are respectively mounted on the traveling fixed seat 13 and the track wheel fixing plate 14. The first sleeve 213 and the second sleeve 214 are slidably connected. The inner parts of the first sleeve 213 and the second sleeve 214 are hollow, forming an inner cavity. An inner spring 211 is installed inside each sleeve. The inner spring 211 is a metal spring with high elasticity. To make the inner spring 211 more flexible, lubricating oil is applied to the inner cavity. A through hole 215 is formed on the inner wall of the cavity, allowing air to be released and introduced when the inner cavity volume increases or decreases, making the contraction or expansion of the first sleeve 213 and the second sleeve 214 smoother. When the first sleeve 213 and the second sleeve 214 undergo relative displacement under external force, the inner spring 211 deforms accordingly within the cavity, thus absorbing most of the force. An outer sleeve spring 212 is fitted onto the first sleeve 213 and the second sleeve 214. The outer sleeve spring 212 is a plastic spring with lower elasticity than the inner spring 211. The number of adaptive devices corresponds to the number of walking devices. In an adaptive device, in order to adapt to the road conditions when the track wheel 11 is walking, multiple elastic telescopic components 21 are set and multiple driven telescopic components 22 are set. The driven telescopic components 22 and elastic telescopic components 21 are arranged along the length direction of the track wheel 11, and the elastic telescopic components 21 are set between two driven telescopic components 22.

[0028] The driven telescopic assembly 22 includes a fixed small sleeve 221 and a telescopic large sleeve 223. The fixed small sleeve 221 is fixedly mounted on the pulley fixing plate 14 by bolts, and the telescopic large sleeve 223 is fixedly mounted on the travel fixing seat 13. The fixed small sleeve 221 has a telescopic column 222 at one end corresponding to the telescopic large sleeve 223. The telescopic large sleeve 223 has a telescopic groove 224 at one end near the fixed small sleeve 221. The telescopic column 222 is slidably inserted into the telescopic groove 224. The telescopic column 222 and the telescopic groove 224 guide the movement between the pulley fixing plate 14 and the travel fixing seat 13. By setting the length and depth of the telescopic column 222 and the telescopic groove 224, the amount of telescopic extension between the telescopic column 222 and the telescopic groove 224 can be adjusted. The amount of extension is set to be less than the amount of extension of the inner spring 211 and the outer spring 212, so that the range of motion of the driven telescopic component 22 is less than that of the elastic telescopic component 21, which protects the frame shell 10 and prevents the elastic telescopic component 21 from generating excessive compression and causing a collision with the frame shell 10.

[0029] Reference Figures 7-10 The sandblasting device includes a sandblasting mechanism and an adjustment mechanism. The sandblasting mechanism includes a nozzle assembly, which includes an air jet head 33, a sandblasting head 32, and a metal housing 34. The metal housing 34 is a cylindrical metal shell. The air jet head 33 is arranged at the end of the metal housing 34 along its length. There are two sandblasting heads 32, which are arranged opposite each other on the side of the metal housing 34. Both sandblasting heads 32 are inclined at 45 degrees away from the air jet head 33.

[0030] The adjustment mechanism includes a sand-air conversion assembly, a conversion drive assembly, and an angle adjustment assembly. The sand-air conversion assembly includes steel ball spokes 41, spherical steel balls 42, an adjustment metal tube 43, and a rubber sleeve joint 44. The steel ball spokes 41 are fixedly installed inside the jet head 33, located in front of the jet head 33's outlet. The steel ball spokes 41 are fixedly connected to the inner wall of the jet head 33. The spherical steel balls 42 are located at the center of the steel ball spokes 41 and are on the axis of the jet head 33.

[0031] A rubber sleeve 44 is fitted onto the end of the adjusting metal tube 43 near the spherical steel ball 42, and is bonded and fixed to the adjusting metal tube 43. The rubber sleeve 44 includes an arc-shaped section 441 and a sealing section 443. The arc-shaped section 441 near the spherical steel ball 42 has a circular hole forming a circular air hole 442. The sealing section 443 is fitted onto the adjusting metal tube 43. A circular friction ring 444 is provided between the sealing section 443 and the metal outer shell 34. The friction ring 444 is made of rubber, and hard plastic balls 445 are hot-melt welded to its surface. The hard plastic balls 445 are evenly distributed along the outer surface of the friction ring 444. The hard plastic balls 445 are in direct contact with the inner wall of the metal outer shell 34, and are pressed inwards towards the friction ring 444, causing the friction ring 444 to contact the inner wall of the metal outer shell 34 simultaneously. The friction ring 444 serves a sealing function, while the hard plastic ball 445 provides a smoothing effect for the friction ring 444 during movement.

[0032] A bellows 434 is connected to the end of the adjusting metal tube 43 away from the rubber sleeve joint 44. The outer layer of the bellows 434 is a metal tube, which serves a protective function. Multiple rubber bellows are installed inside the bellows 434. Due to the material characteristics of the rubber bellows, they can twist relative to the outer metal tube. The sealing requirements of the outer metal tube of the bellows 434 are not high; therefore, the outer metal tube is designed to rotate relative to the adjusting metal tube 43. Four through holes are respectively formed by opposing sides of the adjusting metal tube 43, creating a first adjusting hole 431 and a second adjusting hole 432. The first adjusting hole 431 includes two through holes near the rubber sleeve joint 44, and the second adjusting hole includes two through holes away from the rubber sleeve joint 44. Five rubber bellows are provided, fixedly connected to the four through holes of the first and second adjusting holes 431 and 432, and fixedly connected to the arc-shaped section 441 of the rubber sleeve joint 44. This arrangement ensures that the flow paths of the sandblasting air jets do not interfere with each other. Correspondingly, the rubber corrugated pipe for jetting is connected to the conventional air pump through a pipeline, and the rubber corrugated pipe for sandblasting is connected to the conventional sand pump equipment through a pipeline.

[0033] A partition 433 is formed between the first adjustment hole 431 and the second adjustment hole 432. Both the first adjustment hole 431 and the second adjustment hole 432 are matched with the inlet of the sandblasting head 32. The adjusting metal tube 43 can slide within the metal housing 34, so that the first adjustment hole 431 and the second adjustment hole 432 can be aligned with the inlet of the sandblasting head 32. The conversion drive assembly includes a sleeve housing 51, a motor housing 52, a motor, and a snap-fit ​​sleeve 53. The sleeve housing 51 is fixedly connected to the metal housing 34 and is configured as a cylindrical housing. One end of the adjusting metal tube 43 is disposed within the metal housing 34, and the other end is disposed within the sleeve housing 51. The sleeve 51 is fitted onto the outside of the metal outer shell 34. A snap-fit ​​sleeve 53 is disposed inside the sleeve 51, fitting onto the end of the adjusting metal tube 43 furthest from the rubber joint 44. The snap-fit ​​sleeve 53 is fixed in place and has a protrusion 531. A through groove is formed on the side of the sleeve 51 to create an adjusting slide groove 511. The protrusion 531 extends from the adjusting slide groove 511 to the outside of the sleeve 51. A threaded hole is formed at the end of the protrusion 531 extending out of the sleeve 51. The motor housing 52 is fixedly disposed outside the sleeve 51. The motor housing 52 is cylindrical and completely covers the adjusting slide groove 511 within the housing. A screw is fixedly disposed on the output shaft of the motor. The screw engages with the threaded hole of the protrusion 531 to form a lead screw mechanism. The motor drives the snap-fit ​​sleeve 53 to move back and forth, thereby achieving the technical effect of moving the adjusting metal tube 43.

[0034] The adjusting metal tube 43 can adjust the sandblasting mechanism in three settings: sandblasting mode, air jet mode, and sandblasting-air jet mode. Specifically, in the sandblasting mode, when the conversion drive assembly pushes the adjusting metal tube 43 to the end of the metal housing 34, the rubber sleeve joint 44 contacts the spherical steel ball 42, which blocks the circular air hole 442. The second adjusting hole 432 then connects to the inlet of the sandblasting head 32, and the sandblasting mechanism only sprays sand without air jetting. Specifically, the jet spray setting is as follows: when the conversion drive assembly pushes the adjusting metal tube 43 to move to the baffle 433, blocking the inlet of the sandblasting head 32, the airflow is ejected from the round air hole 442 and directly collides with the spherical steel ball 42, dispersing the airflow and passing through the gaps on the steel ball spokes 41. The gaps on the side of the spokes closer to the spherical steel ball 42 are smaller, while the gaps on the side farther from the spherical steel ball 42 are larger. This arrangement allows the airflow to diffuse in all directions when passing through the steel ball spokes 41, thus expanding the jet cross-section when ejected from the jet head 33. The sandblasting jet spray setting is also as follows: when the conversion drive assembly pushes the adjusting metal tube 43 to connect with the first adjusting hole 431 and the inlet of the sandblasting head 32, sandblasting and jet spraying occur simultaneously.

[0035] The angle adjustment assembly includes an angle adjustment motor 61, a gear ring 62, and an inner slide rail 63. The inner slide rail 63 is located on the inner wall of the frame housing 10. The gear ring 62 is rotatably mounted inside the inner slide rail 63 and is fixedly connected to the motor housing 52 via spokes. A half-stroke stop 621 is provided on the gear ring 62. The half-stroke stop 621 is block-shaped and is used to limit the rotation of the gear ring 62, allowing it to rotate only half a turn at a time. The angle adjustment motor 61 is also fixedly mounted on the inner wall of the frame housing 10. The angle adjustment motor 61 and the gear ring 62 are driven by a gear set. A square housing 64 is provided outside the angle adjustment motor 61, which protects the angle adjustment motor 61 and the gear set. A protective plate 100 is provided on the side of the frame housing 10 near the output end of the nozzle assembly. The sandblasting head 32 and the air jet head 33 are located outside the protective plate 100, which protects the parts.

[0036] The implementation principle of this application embodiment is as follows: During use, the product is placed inside a fluoropolymer-lined steel pipe. The walking device moves the product, and the adaptive device adapts to different pipe diameters. The sandblasting device sprays sand diagonally forward for cleaning, and the jet nozzle 33 blows the sand out of the pipe. The product moves inside the pipe while cleaning, promptly blowing away the debris removed by the sand. This ensures the cleaning effect while protecting the product from damage during the cleaning process.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fluorine lining steel pipe inner cavity polisher characterized by: It includes a frame shell (10), a walking device, an adaptive device, a sandblasting device and a control box (7). The walking device, the adaptive device, the sandblasting device and the control box are all installed on the frame shell (10). A protective plate (100) is provided on the side of the frame shell (10) near the output end of the nozzle assembly. The sandblasting device includes a sandblasting mechanism and an adjustment mechanism, and the sandblasting mechanism includes a nozzle assembly; The nozzle assembly includes an air jet head (33), a sandblasting head (32), and a metal housing (34); The adjustment mechanism includes a sand-gas conversion component, a conversion drive component, and an angle adjustment component; The sand-gas conversion assembly includes steel ball spokes (41), spherical steel balls (42), adjusting metal pipes (43), and rubber sleeve joints (44). The steel ball spokes (41) are fixedly installed inside the jet head (33) and located in front of the outlet of the jet head (33). The steel ball spokes (41) are fixedly connected to the inner wall of the jet head (33). The spherical steel balls (42) are located at the center of the steel ball spokes (41) and on the axis of the jet head (33). The rubber sleeve joint (44) is sleeved on the end of the adjusting metal tube (43) near the spherical steel ball (42). The rubber sleeve joint (44) includes an arc-shaped section (441) and a sealing section (443). The arc-shaped section (441) has a round hole to form a round air hole (442). The side of the regulating metal tube (43) is provided with four through holes to form a first regulating hole (431) and a second regulating hole (432). The first regulating hole (431) includes two through holes close to the rubber sleeve joint (44), and the second regulating hole (432) includes two through holes away from the rubber sleeve joint (44). A partition (433) is formed between the first regulating hole (431) and the second regulating hole (432). The conversion drive assembly includes a socket shell (51), a motor housing (52), a motor, and a snap-fit ​​sleeve (53). The socket shell (51) is fixedly connected to the metal housing (34). The snap-fit ​​sleeve (53) is disposed inside the socket shell (51). The snap-fit ​​sleeve (53) is sleeved on the end of the adjusting metal tube (43) away from the rubber joint (44). The snap-fit ​​sleeve (53) is also provided with a protrusion (531). The side of the sleeve shell (51) is provided with a through groove to form an adjustment slide groove (511). The protruding part (531) extends from the adjustment slide groove (511) to the outside of the sleeve shell (51). The end of the protruding part (531) extending out of the sleeve shell (51) is provided with a threaded hole. The motor housing (52) is fixedly installed outside the sleeve shell (51). A screw is fixedly installed on the output shaft of the motor.

2. A liner pipe inner surface polishing machine according to claim 1, characterized in that: The metal casing (34) is configured as a cylindrical metal casing, the jet head (33) is disposed at the end of the metal casing (34) along the length direction of the metal casing (34), and there are two sandblasting heads (32), both of which are inclined at 45 degrees away from the jet head (33).

3. A liner pipe inner surface polishing machine according to claim 1, characterized in that: The sealing section (443) is sleeved with the adjusting metal tube (43), and a circular friction ring (444) is provided between the sealing section (443) and the metal shell (34). Hard plastic balls (445) are hot-melt welded to the surface of the friction ring (444), and the hard plastic balls (445) are evenly distributed along the outer surface of the friction ring (444).

4. The liner steel pipe inner cavity polisher according to claim 1, characterized in that: The end of the adjusting metal tube (43) away from the rubber sleeve joint (44) is connected to a corrugated tube (434). The outer layer of the corrugated tube (434) is a metal tube, and a plurality of rubber tube corrugated tubes are provided inside the corrugated tube (434). The number of rubber tube corrugated tubes is five, which are fixedly connected to the four through holes of the first adjusting hole (431) and the second adjusting hole (432), respectively, and fixedly connected to the arc-shaped section (441) of the rubber sleeve joint (44).

5. The liner steel pipe inner cavity polisher according to claim 1, characterized in that: The angle adjustment assembly includes an angle adjustment motor (61), a gear ring (62), and an inner slide rail (63). The inner slide rail (63) is opened on the inner wall of the frame shell (10). The angle adjustment motor (61) and the gear ring (62) are driven by gear meshing. The angle adjustment motor (61) is provided with a square shell (64) on its exterior.

6. A liner pipe inner surface polishing machine according to claim 5, characterized in that The gear ring (62) is rotatably disposed inside the inner slide (63), and a half-stroke stop (621) is provided on the gear ring (62).

7. A liner pipe inner surface polishing machine according to claim 1, characterized in that: The walking device includes a walking fixed seat (13) and a wheel fixing plate (14). The walking fixed seat (13) is fixedly installed on the frame shell (10). The wheel fixing plate (14) is located at the end of the walking fixed seat (13) away from the frame shell (10). The adaptive device is located between the wheel fixing plate (14) and the walking fixed seat (13). The wheel fixing plate (14), the walking fixed seat (13) and the adaptive device together form a rectangular frame. A fixing handle (15) is provided on the wheel fixing plate (14) at the end away from the frame shell (10). A track wheel (11) and a drive motor (12) for driving the track wheel (11) are installed on the fixing handle (15).

8. A grinding machine for the inner cavity of a fluoropolymer-lined steel pipe according to claim 1, characterized in that: The adaptive device includes an elastic telescopic assembly (21) and a driven telescopic assembly (22). The elastic telescopic assembly (21) includes a first sleeve (213) and a second sleeve (214). The first sleeve (213) and the second sleeve (214) are slidably connected. The interior of the first sleeve (213) and the second sleeve (214) is hollow to form an inner cavity. An inner cavity spring (211) is provided inside the first sleeve (213) and the second sleeve (214).

9. A grinding machine for the inner cavity of a fluoropolymer-lined steel pipe according to claim 8, characterized in that: The inner wall of the cavity is provided with through holes to form vents (215).

10. A grinding machine for the inner cavity of a fluoropolymer-lined steel pipe according to claim 8, characterized in that: The driven telescopic assembly (22) includes a fixed small sleeve (221) and a telescopic large sleeve (223). The fixed small sleeve (221) is fixedly mounted on the pulley fixing plate (14) by bolts. The telescopic large sleeve (223) is fixedly mounted on the walking fixing seat (13). The fixed small sleeve (221) is provided with a telescopic column (222) at one end corresponding to the telescopic large sleeve (223). The telescopic large sleeve (223) is provided with a telescopic groove (224) at one end near the fixed small sleeve (221). The telescopic column (222) is slidably inserted into the telescopic groove (224).

Images