Metal pipeline inner wall rust removal device

Abstract

The utility model relates to the technical field of pipeline derusting devices, in particular to a metal pipeline inner wall derusting device which comprises a pipeline dredging main machine, a quick connector, a detachable flexible shaft and a derusting brush head assembly, the detachable flexible shaft comprises a transmission flexible shaft core and a flexible shaft protection pipe, and the transmission flexible shaft core is sleeved inside the flexible shaft protection pipe and can rotate relative to the flexible shaft protection pipe. The pipeline dredging device is reasonable and compact in structure and convenient to use, the pipeline dredging device is connected with the pipeline dredging main machine through the detachable flexible shaft, a rotary brush head device of the rust removal brush head assembly is driven, a rust removal steel brush rotates and advances to achieve rust removal, guiding and centering are conducted through the idler wheel guiding device, other guiding mechanisms are not needed for positioning, and the pipeline dredging device is convenient to use. The derusting brush head assembly can be conveniently and quickly mounted in a metal pipeline to be derusted, is simple and convenient to operate and use, is particularly suitable for derusting the inner walls of long pipelines and small-caliber pipelines with large curvature, cannot damage equipment and two ends of the pipelines, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline rust removal devices, specifically a rust removal device for the inner wall of metal pipelines. Background Technology

[0002] Metal pipelines, especially steel pipes, play a vital role in water conservancy projects and the transportation of oil and natural gas, serving as essential components for transporting fluids, gases, powdery solids, and exchanging heat. After prolonged storage or use, metal pipelines often rust. Most pipelines require anti-corrosion treatment before use. While grinding and protecting the outer surface of metal pipelines is relatively easy, existing rust removal equipment is inadequate for removing rust from the inner walls of small-diameter pipelines (inner diameter less than 100mm). Since most existing civilian metal pipelines have a diameter less than 100mm, due to technological and equipment limitations, deep rust removal from the inside of these pipelines is usually impossible through grinding; only short-distance grinding at both ends is possible. Rust removal from the inner walls of small-diameter pipelines has become a pressing problem that urgently needs to be solved.

[0003] Chinese patent document CN212706053U discloses a pipe rust removal device, which includes a traction rope, a rust removal mechanism, a guiding mechanism, and a driving mechanism. The traction rope is knotted into a loop and passes through the pipe to be rusted. The rust removal mechanism is fixedly mounted on the traction rope and is used to enter the pipe to be rusted and remove rust. There are at least two guiding mechanisms, which are respectively located at both ends of the pipe to be rusted and are used to guide the traction rope. The power output end of the driving mechanism is connected to the traction rope and is used to drive the traction rope to move, thereby driving the rust removal mechanism to move inside the pipe. Through the cooperation of the traction rope, the rust removal mechanism, the guiding mechanism, and the driving mechanism, rust removal of medium-diameter straight pipes and curved pipes can be completed conveniently and quickly. While the aforementioned rust removal device can remove rust from the inner walls of small-diameter pipes, it presents the following problems in actual use: 1. Because it requires a traction rope to be knotted into a loop and passed through the pipe to be rusted, it cannot remove rust from the inner walls of longer pipes. Furthermore, when the pipe has a large degree of curvature, the traction rope wears out quickly, and if it breaks, it can easily damage the equipment. 2. It requires a guide mechanism fixed to both ends of the pipe to be rusted to guide the traction rope. The guide mechanism is cumbersome to install and prone to detachment, causing equipment damage. 3. During the installation and fixing of the guide mechanism, as well as during the pulling and vibration during the rust removal process, the guide mechanism can easily damage both ends of the pipe, causing deformation and potential quality issues. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a metal pipe inner wall rust removal device, which overcomes the shortcomings of the above-mentioned prior art. It can effectively solve the problems that existing pipe rust removal devices cannot complete the inner wall rust removal of long pipes and pipes with large curvature, the guide mechanism is cumbersome to install and is easy to fall off, and it is easy to damage the equipment and damage the two ends of the pipe.

[0005] The technical solution adopted by this utility model is as follows: a rust removal device for the inner wall of metal pipes, including a pipe cleaning main unit, a quick connector, a detachable flexible shaft, and a rust removal brush head assembly. The detachable flexible shaft includes a transmission flexible shaft core and a flexible shaft protective tube. The transmission flexible shaft core is fitted inside the flexible shaft protective tube and can rotate relative to the flexible shaft protective tube. The pipe cleaning main unit is provided with a quick-connect female connector that can install the quick connector. The quick-connect female connector contains a transmission sleeve shaft. The quick connector includes a quick-connect body, a male clamp, and a transmission shaft core. A male clamp that can connect to the quick-connect female connector of the pipe cleaning main unit is installed on the upper outer side of the quick-connect body. The lower end of the quick-connect body is connected to the end of the flexible shaft protective tube. The quick-connect body contains a transmission shaft core that can connect to the transmission sleeve shaft. The transmission shaft core is connected to the end of the transmission flexible shaft core and can drive the transmission flexible shaft core to rotate. The length of the transmission flexible shaft core is greater than the length of the flexible shaft protective tube, and the end of the transmission flexible shaft core extends beyond the end of the flexible shaft protective tube. Externally, the rust-removing brush head assembly can be fitted inside the inner cavity of the metal pipe to be rusted. The rust-removing brush head assembly includes a roller guide device and a rotating brush head device with a rust-removing steel brush. The end of the flexible shaft protective tube is connected to the roller guide device and can move along the inner wall of the metal pipe to be rusted. The roller guide device includes a guide wheel and a rust-removing rotating shaft. There are no fewer than three guide wheels on the outside of the roller guide device, which are evenly spaced around the outer circumference of the roller guide device. The rust-removing rotating shaft is located inside the roller guide device and can be connected to the end of the transmission flexible shaft core. No fewer than one rotating brush head device is fixedly installed on the rust-removing rotating shaft. There are no fewer than three steel brush frames on the outside of each rotating brush head device. Each steel brush frame is evenly spaced around its corresponding rotating brush head device. The rust-removing steel brush is fixedly installed on the outer end of the steel brush frame. The rust-removing rotating shaft can drive each steel brush frame and the rust-removing steel brush to rotate inside the metal pipe to be rusted.

[0006] The following are further optimizations and / or improvements to the technical solution applied for:

[0007] Furthermore, as a preferred embodiment, the roller guide device further includes a wheel frame sleeve, a drive rotating sleeve, a positioning seat sleeve, a wear-resistant bushing, a stop sleeve, a frame nut, and a spring wheel frame. The upper outer side of the wheel frame sleeve is provided with a threaded mounting on the frame sleeve and a frame nut is fixedly installed thereon. The frame nut includes a top ring and a threaded sleeve. The lower outer edge of the top ring is integrally connected to the upper end of the threaded sleeve. The threaded sleeve is fixedly connected to the threaded mounting on the frame sleeve via an internal thread. The lower end of the top ring axially limits the drive rotating sleeve and presses the end of the flexible shaft protective tube against the upper end of the wheel frame sleeve. At least three wheel frame pedestals are provided in the middle of the outer side of the wheel frame sleeve. Each wheel frame pedestal is evenly spaced around the outer circumference of the wheel frame sleeve. The seat has screw holes for wheel holders and a fixed spring wheel holder. The guide wheel is mounted on the spring wheel holder and can press against the inner wall of the metal pipe to be derusted. The lower part of the inner wall of the wheel holder sleeve has a threaded groove. The inner wall of the drive sleeve below the threaded groove has an inner annular groove. The inner wall of the drive sleeve below the inner annular groove has a threaded groove. The inner diameter of the threaded groove is larger than the inner diameter of the inner annular groove. The upper and lower outer ends of the drive sleeve have bearing grooves and are fitted with a rotating bearing. The drive sleeve is mounted in the inner cavity of the wheel holder sleeve above the threaded groove through the rotating bearing. The drive sleeve is able to rotate freely. The upper end of the inner cavity of the drive sleeve has a square countersunk hole. The lower end of the transmission flexible shaft core is fixed with a square connector and secured in the square countersunk hole by a radial pin. The center of the drive sleeve below the square countersunk hole has a screw hole for the drive sleeve and a rust-removing rotating shaft is fixedly installed there. A wear-resistant bushing is fitted between the positioning seat sleeve and the rust-removing rotating shaft. A retaining sleeve is fixedly installed in the inner cavity of the wheel frame sleeve below the positioning seat sleeve. The retaining sleeve has an external thread on its outer side and is fixedly installed in the groove of the sleeve thread through the external thread. The retaining sleeve is fixed to the wheel frame sleeve by a locking set screw. The lower end of the retaining sleeve is located outside the inner cavity of the wheel frame sleeve and has a wrench square hole. The rust-removing rotating shaft includes a rotating shaft upper neck and a rotating... The shaft step, the outer platform of the rotating shaft, and the main body of the rotating shaft are connected as a whole from top to bottom. The upper outer side of the upper neck of the rotating shaft is threaded and fixed in the rotating sleeve screw hole of the drive rotating sleeve. The rotating shaft step is fitted in the wear-resistant bushing and can rotate. The upper part of the outer platform of the rotating shaft is fitted in the positioning seat and can rotate. The lower part of the outer platform of the rotating shaft is fitted in the retaining sleeve and can rotate. The left and right sides of the main body of the rotating shaft are flattened to form a column with a flat round cross-section. The rotating brush head device is provided with a flat round core hole that is adapted to the cross-sectional shape of the main body of the rotating shaft. The rotating brush head device is fixedly installed on the main body of the rotating shaft through the flat round core hole and the locking pin.

[0008] Furthermore, as a preferred embodiment, the outer side of the middle portion of the sleeve nut is provided with a wrench groove, which is a pair of recesses on two opposite outer surfaces, and the bottom surfaces of the pair of recesses are rectangular and parallel to each other.

[0009] Furthermore, as a preferred embodiment, the spring wheel frame includes a wheel frame seat sleeve, a wheel frame arm, a wheel frame slider, a wheel frame slide rail, a wheel frame spring groove, and a wheel frame spring. The outer side of the wheel frame seat sleeve is threaded and fixedly installed in the wheel frame seat screw hole of the wheel frame base. The inner cavity of the wheel frame seat sleeve is provided and the wheel frame arm is installed therein. The inner end of the wheel frame arm is fixedly connected to the wheel frame slider, and the outer end of the wheel frame arm is fixed to a roller axle and a guide wheel is installed therein. The upper and lower sides of the inner cavity wall of the wheel frame seat sleeve are provided with wheel frame slide rails. The wheel frame slider is installed in the wheel frame slide rails and can slide left and right. The inner end of the wheel frame slider is provided with a wheel frame spring groove and a wheel frame spring is installed therein. The inner end of the wheel frame spring is pressed against the bottom surface of the inner cavity of the wheel frame seat sleeve.

[0010] Furthermore, preferably, the rotating brush head device includes a rotating brush sleeve and a spring brush holder. The rotating brush sleeve is fixedly mounted on the rust-removing rotating shaft. At least three brush holder bases are provided on the outer center of the rotating brush sleeve. Each brush holder base is evenly spaced around the outer circumference of the rotating brush sleeve. Each brush holder base has a brush holder screw hole inside and a spring brush holder is fixedly installed thereon. The spring brush holder includes a brush holder sleeve, a brush holder arm, a brush holder slider, a brush holder slide rail, a brush holder spring groove, and a brush holder spring. The brush holder is threaded and fixedly installed in the screw hole of the brush holder base. The brush holder base has an inner cavity and a brush holder arm is installed inside. The inner end of the brush holder arm is fixedly connected to the brush holder slider. The outer end of the brush holder arm is fixed with a steel brush holder and a rust-removing steel brush. The upper and lower sides of the inner cavity wall of the brush holder base have brush holder slides. The brush holder slider is installed in the brush holder slide and can slide left and right. The inner end of the brush holder slider has a brush holder spring groove and a brush holder spring is installed. The inner end of the brush holder spring is pressed against the bottom surface of the inner cavity of the brush holder base.

[0011] Furthermore, as a preferred embodiment, two rotating brush head devices are fixedly installed on the rust removal shaft. The two rotating brush head devices are arranged close together vertically, and the rust removal steel brushes on each rotating brush head device are arranged in a staggered manner.

[0012] Furthermore, as a preferred embodiment, the lower end of the rust-removing shaft is fitted with a shaft end cap, the lower part of which is semi-circular or smooth convex arc-shaped, and the center of the lower end of the shaft end cap protrudes downward. The shaft end cap is fixedly installed on the rust-removing shaft by an end cap screw.

[0013] This utility model has a reasonable and compact structure and is easy to use. It connects to the pipe cleaning host through a detachable flexible shaft, which drives the rotating brush head device of the rust removal brush head assembly to rotate and move the rust removal steel brush to remove rust. The roller guide device guides and centers the brush, eliminating the need for other guiding mechanisms for positioning. It is convenient and quick to install the rust removal brush head assembly into the metal pipe to be rusted. It is simple and convenient to operate and is especially suitable for removing rust from the inner wall of long pipes and small-diameter pipes with large bends. It will not damage the equipment or the two ends of the pipe, and has the characteristics of safety, labor saving, simplicity and high efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of the present invention during operation;

[0015] Figure 2 This is a magnified half-section structural diagram of the main view of this utility model;

[0016] Figure 3 for Figure 2 A magnified structural diagram of point A in the diagram.

[0017] Legend: 1 is a quick coupling, 101 is the quick coupling body, 102 is the male fitting, 103 is the drive shaft core, 2 is a detachable flexible shaft, 201 is the drive flexible shaft core, 202 is the flexible shaft protective tube, 3 is the metal pipe to be derusted, 4 is the roller guide device, 400 is the wheel frame sleeve, 4001 is the thread on the frame sleeve, 4002 is the wheel frame base, 4003 is the threaded hole on the wheel frame base, 4004 is the thread in the frame sleeve, 4005 is the inner annular groove of the frame sleeve, 4006 is the grooved groove of the sleeve thread, 401 is the guide wheel, 402 is the derusting rotating shaft, 4021 is the upper neck of the rotating shaft, 4022 is the step of the rotating shaft, 4023 is the outer platform of the rotating shaft, 4024 is the main body of the rotating shaft, 403 is the drive rotating sleeve, 4031 is the square countersunk hole, 4032 is the screw hole of the rotating sleeve, 404 is the positioning seat sleeve, 405 is the durable... Grinding bushing, 406 is the retaining sleeve, 4061 is the locking set screw, 4062 is the wrench square hole, 407 is the bracket nut, 408 is the spring wheel bracket, 4081 is the wheel bracket seat sleeve, 4082 is the wheel bracket arm, 4083 is the wheel bracket slider, 4084 is the wheel bracket slide rail, 4085 is the wheel bracket spring groove, 4086 is the wheel bracket spring, 5 is the rotating brush head device, 500 is the rotating brush sleeve, 500 1 is a flat oval core hole, 5002 is a brush holder base, 5003 is a brush holder screw hole, 501 is a rust-removing steel brush, 502 is a spring brush holder, 5021 is a brush holder seat sleeve, 5022 is a brush holder arm, 5023 is a brush holder slider, 5024 is a brush holder slide, 5025 is a brush holder spring groove, 5026 is a brush holder spring, 503 is a locking pin, 6 is a rotating shaft end cap, and 601 is an end cap screw. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1:

[0020] As attached Figure 1-3As shown, this utility model provides a rust removal device for the inner wall of metal pipes, including a pipe cleaning main unit, a quick connector 1, a detachable flexible shaft 2, and a rust removal brush head assembly. The detachable flexible shaft 2 includes a transmission flexible shaft core 201 and a flexible shaft protective tube 202. The transmission flexible shaft core 201 is fitted inside the flexible shaft protective tube 202 and can rotate relative to the flexible shaft protective tube 202. The pipe cleaning main unit is provided with a quick-connect female connector that can install the quick connector 1. The quick-connect female connector is provided with a transmission sleeve shaft inside. The quick connector 1 includes a quick-connect body 101, a male clamp 102, and a transmission... The quick-connect body 101 has a male fitting 102 installed on its upper outer side, which can connect to the female quick-connect fitting of the pipe cleaning machine. The lower end of the quick-connect body 101 is connected to the end of the flexible shaft protective tube 202. Inside the quick-connect body 101, there is a drive shaft core 103 that can connect to the drive sleeve shaft. The drive shaft core 103 is connected to the end of the flexible drive shaft core 201 and can drive the flexible drive shaft core 201 to rotate. The length of the flexible drive shaft core 201 is greater than the length of the flexible shaft protective tube 202, and the end of the flexible drive shaft core 201 extends into the flexible shaft. The rust-removing brush head assembly can be fitted inside the inner cavity of the metal pipe 3 to be rusted, outside the end of the shaft protective tube 202. The rust-removing brush head assembly includes a roller guide device 4 and a rotating brush head device 5 with a rust-removing steel brush 501. The end of the flexible shaft protective tube 202 is connected to the roller guide device 4 and can move along the inner wall of the metal pipe 3 to be rusted. The roller guide device 4 includes a guide wheel 401 and a rust-removing rotating shaft 402. At least three guide wheels 401 are provided on the outside of the roller guide device 4 and are evenly spaced around the outer circumference of the roller guide device 4. The rust-removing rotary shaft 402 is located inside the roller guide device 4 and can be connected to the end of the transmission flexible shaft core 201. At least one rotating brush head device 5 is fixedly installed on the rust-removing rotary shaft 402. At least three steel brush frames are provided on the outer side of each rotating brush head device 5. Each steel brush frame is evenly spaced around its corresponding rotating brush head device 5. The rust-removing steel brush 501 is fixedly installed on the outer end of the steel brush frame. The rust-removing rotary shaft 402 can drive each steel brush frame and the rust-removing steel brush 501 to rotate inside the metal pipe 3 to be rusted.In use, connect the quick connector 1 of this utility model to the pipe cleaning host, insert the rust removal brush head assembly into one end of the inner cavity of the metal pipe 3 to be rusted, and start the pipe cleaning host to remove rust. The rust removal brush head assembly is supported on the inner wall of the metal pipe 3 by the guide wheel 401 of the roller guide device 4. The pipe cleaning host drives the transmission flexible shaft 201 to rotate through the transmission shaft core 103. The transmission flexible shaft core 201 drives the rotating brush head device 5 to rotate at high speed through the rust removal rotating shaft 402. The rotating brush head device 5 rotates due to friction inside the metal pipe 3 to be rusted. The rotating brush head device 5, with its steel brush 501, scrapes away the rust layer on the wall of the metal pipe 3 while rotating downwards within the cavity, ultimately removing the rust. The rust removal brush head assembly is connected to the main pipe cleaning unit only at its upper end via a detachable flexible shaft 2, eliminating the need for other guiding mechanisms for positioning. Installing the rust removal brush head assembly into the metal pipe 3 is quick and easy, and the operation is simple and convenient. It is particularly suitable for removing rust from the inner walls of long pipes and small-diameter pipes with large bends, without damaging the equipment or the ends of the pipe. It features safety, labor-saving, simplicity, and high efficiency. The pipe dredging host is a known and commonly used pipe dredging and cleaning device, such as the YQ-T-5500 blockage pipe dredging machine or the YQ-T-550 condenser pipe cleaning machine produced by Anhui Yuanqing Pipeline Technology Co., Ltd. It adopts a flexible shaft quick-connect dredging device disclosed in Chinese patent document CN219035901U. The pipe dredging host is equipped with a female connector with a transmission sleeve shaft. The flexible shaft with quick connector 1 can be quickly connected to the pipe dredging host through the female connector and drive the transmission shaft core of the flexible shaft.

[0021] In actual rust removal, the metal pipe 3 to be rusted can be placed vertically, and its lower end connected to a rust dust collection device to collect dust and rust from the rust removal process. This invention saves installation time compared to existing pipe rust removal devices and features convenient rust removal operations, low construction risk, and no environmental pollution. In actual use, it is necessary to first turn off the main pipe cleaning unit, check that the quick connector 1 is reliably connected to the main pipe cleaning unit, and safely install the rust removal brush assembly into the metal pipe 3 before using this invention for rust removal.

[0022] Example 2:

[0023] As attached Figure 2-3As shown, the difference between this embodiment and Embodiment 1 is that the roller guide device 4 further includes a wheel frame sleeve 400, a drive rotating sleeve 403, a positioning seat sleeve 404, a wear-resistant bushing 405, a stop sleeve 406, a frame nut 407, and a spring wheel frame 408. The upper outer side of the wheel frame sleeve 400 is provided with a frame sleeve thread 4001 and a frame nut 407 is fixedly installed thereon. The frame nut 407 includes a top ring and a threaded sleeve. The lower outer edge of the top ring is integrated with the upper end of the threaded sleeve. The threaded sleeve is fixedly connected to the frame sleeve thread 4001 through an internal thread. The lower end of the top ring axially limits the drive rotating sleeve 403 and presses the end of the flexible shaft protective tube 202 against it. At the upper end of the wheel frame sleeve 400, at least three wheel frame bases 4002 are provided on the outer middle of the wheel frame sleeve 400. Each wheel frame base 4002 is evenly spaced around the outer circumference of the wheel frame sleeve 400. Each wheel frame base 4002 has a wheel frame base screw hole 4003 inside, and a spring wheel frame 408 is fixedly installed thereon. The guide wheel 401 is installed on the spring wheel frame 408 and can press against the inner wall of the metal pipe 3 to be derusted. The lower part of the inner wall of the wheel frame sleeve 400 has a central thread 4004. Corresponding to the central thread 4004, the inner wall of the drive sleeve 403 below it has a central annular groove 4005. The inner wall of the drive sleeve 403, located below the inner annular groove 4005 of the support sleeve, is provided with a sleeve thread groove 4006. The inner diameter of the sleeve thread groove 4006 is larger than the inner diameter of the inner annular groove 4005 of the support sleeve. The upper and lower outer ends of the drive sleeve 403 are respectively provided with bearing grooves and are equipped with swivel bearings. The drive sleeve 403 is installed in the inner cavity of the wheel frame sleeve 400 above the thread 4004 in the support sleeve through the swivel bearings and can rotate freely. The upper end of the inner cavity of the drive sleeve 403 is provided with a square countersunk hole 4031. The lower end of the transmission flexible shaft core 201 is fixed with a square connector and fixed to the square countersunk hole by radial pins. Inside 4031, the center of the drive sleeve 403 below the square countersunk hole 4031 is provided with a sleeve screw hole 4032 and a rust removal shaft 402 is fixedly installed. A wear-resistant bushing 405 is fitted between the positioning seat sleeve 404 and the rust removal shaft 402. A retainer 406 is fixedly installed in the inner cavity of the wheel frame sleeve 400 below the positioning seat sleeve 404. The outer side of the retainer 406 is provided with a screw thread and is fixedly installed in the sleeve thread groove 4006 through the screw thread. The retainer 406 is fixed on the wheel frame sleeve 400 by a locking set screw 4061. The lower end of the retainer 406 is located outside the inner cavity of the wheel frame sleeve 400 and is provided with a wrench square hole 4062.The rust-removing rotary shaft 402 includes an upper shaft neck 4021, a shaft step 4022, a shaft outer platform 4023, and a shaft body 4024. The upper shaft neck 4021, shaft step 4022, shaft outer platform 4023, and shaft body 4024 are connected as a single unit from top to bottom. The upper outer part of the upper shaft neck 4021 is threaded and fixed within the rotating sleeve thread hole 4032 of the drive rotating sleeve 403. The shaft step 4022 is fitted into the wear-resistant bushing 405 and can rotate. The outer platform... The upper part of the rotating shaft outer platform 4023 is fitted into the positioning seat 404 and can rotate. The lower part of the rotating shaft outer platform 4023 is fitted into the retaining sleeve 406 and can rotate. The left and right sides of the rotating shaft body 4024 are flattened to form a column with a flattened oval cross-section. The rotating brush head device 5 is provided with a flattened oval core hole 5001 that is adapted to the cross-sectional shape of the rotating shaft body 4024. The rotating brush head device 5 is fixedly installed on the rotating shaft body 4024 through the flattened oval core hole 5001 and the locking pin 503.

[0024] Example 3:

[0025] As attached Figure 2 As shown, the difference between this embodiment and embodiments 1 and 2 is that a wrench slot is provided on the outer side of the middle part of the sleeve nut 407. The wrench slot is a pair of countersunk grooves on two opposite outer surfaces, and the bottom surfaces of the pair of countersunk grooves are rectangular and parallel to each other. The wrench slot makes it easy to install, tighten, and remove the sleeve nut 407, making it more convenient to use.

[0026] Example 4:

[0027] As attached Figure 2As shown, the difference between this embodiment and embodiments 1-3 is that the spring wheel frame 408 includes a wheel frame seat 4081, a wheel frame arm 4082, a wheel frame slider 4083, a wheel frame slide rail 4084, a wheel frame spring groove 4085, and a wheel frame spring 4086. The outer side of the wheel frame seat 4081 is threaded and fixedly installed in the wheel frame seat screw hole 4003 of the wheel frame base 4002. The inner cavity of the wheel frame seat 4081 is provided and the wheel frame arm 4082 is installed thereon. The inner end is fixedly connected to a wheel frame slider 4083, the outer end of the wheel frame arm 4082 is fixed to a roller shaft frame and a guide wheel 401 is installed, the upper and lower sides of the inner cavity wall of the wheel frame seat 4081 are provided with wheel frame slide rails 4084, the wheel frame slider 4083 is installed in the wheel frame slide rail 4084 and can slide left and right, the inner end of the wheel frame slider 4083 is provided with a wheel frame spring groove 4085 and a wheel frame spring 4086 is installed, and the inner end of the wheel frame spring 4086 is pressed against the bottom surface of the inner cavity of the wheel frame seat 4081. In actual manufacturing, an elastic retaining ring is fixedly installed at the outer end of the wheel frame slide 4084 to prevent the wheel frame slider 4083 from disengaging from the wheel frame slide 4084. By setting the wheel frame slide 4084, the wheel frame slider 4083 can be guided and limited. By setting the wheel frame spring 4086, the wheel frame arm 4082 can drive the roller shaft frame and guide wheel 401 to always press against the inner wall of the metal pipe 3 to be derusted, thereby limiting the derusting brush head assembly and keeping its center always at the center of the inner cavity of the metal pipe 3 to be derusted.

[0028] Example 5:

[0029] As attached Figure 2As shown, the difference between this embodiment and embodiments 1-4 is that the rotating brush head device 5 includes a rotating brush sleeve 500 and a spring brush holder 502. The rotating brush sleeve 500 is fixedly installed on the rust removal rotating shaft 402. At least three brush holder bases 5002 are provided on the outer center of the rotating brush sleeve 500. Each brush holder base 5002 is evenly spaced around the outer circumference of the rotating brush sleeve 500. Each brush holder base 5002 has a brush holder screw hole 5003 inside and a spring brush holder 502 is fixedly installed thereon. The spring brush holder 502 includes a brush holder sleeve 5021, a brush holder arm 5022, a brush holder slider 5023, a brush holder slide rail 5024, a brush holder spring groove 5025, and a brush holder spring 5026. The outer side of the brush holder 5021 is threaded and fixedly installed in the brush holder screw hole 5003 of the brush holder base 5002. The brush holder base 5021 has an inner cavity and a brush holder arm 5022 is installed inside. The inner end of the brush holder arm 5022 is fixedly connected to the brush holder slider 5023. The outer end of the brush holder arm 5022 is fixed with a steel brush holder and a rust-removing steel brush 501 is installed. The upper and lower sides of the inner cavity wall of the brush holder base 5021 are provided with brush holder slides 5024. The brush holder slider 5023 is installed in the brush holder slides 5024 and can slide left and right. The inner end of the brush holder slider 5023 is provided with a brush holder spring groove 5025 and a brush holder spring 5026 is installed inside. The inner end of the brush holder spring 5026 is pressed against the bottom surface of the inner cavity of the brush holder base 5021. The flat, round hole 5001 is located at the center of the rotary brush sleeve 500. The rotary brush sleeve 500 is fixedly installed on the rust removal shaft 402 through the flat, round hole 5001. An elastic retaining ring is fixedly installed at the outer end of the brush holder slide 5024 to prevent the brush holder slider 5023 from disengaging from the brush holder slide 5024. By setting the brush holder slide 5024, the brush holder slider 5023 can be guided and limited. By setting the brush holder spring 5026, the brush holder arm 5022 can drive the steel brush holder and the rust removal steel brush 501 to always press against the inner wall of the metal pipe 3 to be rusted, limiting the rust removal brush head assembly and keeping its center always at the center of the inner cavity of the metal pipe 3 to be rusted.

[0030] Example 6:

[0031] As attached Figure 1-2 As shown, the difference between this embodiment and Embodiment 1 is that two rotating brush head devices 5 are fixedly installed on the rust-removing rotary shaft 402. The two rotating brush head devices 5 are arranged close together vertically, and the rust-removing steel brushes 501 on each rotating brush head device 5 are arranged in a staggered manner. The combination of the two rotating brush head devices 5 and the staggered arrangement of the corresponding rust-removing steel brushes 501 can eliminate blind spots during rotation, resulting in a better rust removal effect.

[0032] Example 7:

[0033] As attached Figure 1-2As shown, the difference between this embodiment and Embodiment 1 is that a shaft end cap 6 is fitted onto the lower end of the rust-removing shaft 402. The lower part of the shaft end cap 6 is semi-circular or smooth convex arc-shaped, and the center of the lower end of the shaft end cap 6 protrudes downward. The shaft end cap 6 is fixedly installed on the rust-removing shaft 402 by an end cap screw 601. The downward protrusion of the lower end of the shaft end cap 6 reduces air resistance and prevents dust and rust from splashing and damaging the end of the rust-removing shaft 402.

[0034] This utility model is described in the appendix to the specification. Figure 1 For reference purposes, directional terms such as "up," "down," "left," "right," "top," and "bottom" are used only to better and more clearly explain and understand this utility model, and are not intended to indicate or imply that the device or component 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 utility model.

[0035] The preferred embodiments of this utility model have been described above, but should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are within the scope of protection of this utility model.

Claims

1. A rust removal device for the inner wall of a metal pipe, characterized in that: The system includes a pipe cleaning unit, quick connectors, a detachable flexible shaft, and a rust-removing brush head assembly. The detachable flexible shaft includes a drive flexible shaft core and a flexible shaft sheath. The drive flexible shaft core is fitted inside the flexible shaft sheath and can rotate relative to it. The pipe cleaning unit has a quick-connect female connector for mounting the quick connector. The quick-connect female connector contains a drive sleeve shaft. The quick connector includes a quick-connect body, a male clamp, and a drive shaft core. A male clamp is mounted on the upper outer side of the quick-connect body to connect with the quick-connect female connector of the pipe cleaning unit. The lower end of the quick-connect body connects to the end of the flexible shaft sheath. Inside the quick-connect body is a drive shaft core that connects to the drive sleeve shaft. The drive shaft core connects to the end of the drive flexible shaft core and can drive it to rotate. The length of the drive flexible shaft core is greater than the length of the flexible shaft sheath, and its end extends beyond the end of the flexible shaft sheath. The rust-removing brush head assembly can be fitted with... The rust-removing brush head assembly, installed inside the cavity of the metal pipe to be rusted, includes a roller guide device and a rotating brush head device with a rust-removing steel brush. The end of the flexible shaft protective tube is connected to the roller guide device and can move along the inner wall of the metal pipe to be rusted. The roller guide device includes a guide wheel and a rust-removing rotating shaft. At least three guide wheels are provided on the outside of the roller guide device and are evenly spaced around the outer circumference of the roller guide device. The rust-removing rotating shaft is located inside the roller guide device and can be connected to the end of the transmission flexible shaft core. At least one rotating brush head device is fixedly installed on the rust-removing rotating shaft. At least three steel brush frames are provided on the outside of each rotating brush head device. Each steel brush frame is evenly spaced around its corresponding rotating brush head device. The rust-removing steel brush is fixedly installed on the outer end of the steel brush frame. The rust-removing rotating shaft can drive each steel brush frame and the rust-removing steel brush to rotate inside the metal pipe to be rusted.

2. The rust removal device for the inner wall of a metal pipe according to claim 1, characterized in that: The roller guide device also includes a wheel frame sleeve, a drive rotating sleeve, a positioning seat sleeve, a wear-resistant bushing, a stop sleeve, a frame nut, and a spring wheel frame. The upper outer side of the wheel frame sleeve is threaded with a frame nut, which is fixedly installed thereon. The frame nut includes a top ring and a threaded sleeve. The lower outer edge of the top ring is integrally connected to the upper end of the threaded sleeve. The threaded sleeve is fixedly connected to the threaded part of the frame sleeve via an internal thread. The lower end of the top ring axially limits the drive rotating sleeve and presses the end of the flexible shaft protective tube against the upper end of the wheel frame sleeve. At least three wheel frame pedestals are provided in the middle of the outer side of the wheel frame sleeve. Each wheel frame pedestal is evenly spaced around the outer circumference of the wheel frame sleeve. Each wheel frame pedestal has a... A spring wheel frame is fixedly installed with a wheel frame seat screw hole. The guide wheel is mounted on the spring wheel frame and can press against the inner wall of the metal pipe to be derusted. The lower part of the inner wall of the wheel frame sleeve is provided with a thread in the sleeve. The inner wall of the drive rotating sleeve below the thread in the sleeve is provided with an inner annular groove in the sleeve. The inner wall of the drive rotating sleeve below the inner annular groove in the sleeve is provided with a sleeve thread groove. The inner diameter of the sleeve thread groove is larger than the inner diameter of the inner annular groove in the sleeve. The upper and lower outer ends of the drive rotating sleeve are respectively provided with bearing grooves and rotating sleeve bearings are installed. The drive rotating sleeve is installed in the inner cavity of the wheel frame sleeve above the thread in the sleeve through the rotating sleeve bearings and can be self-supporting. The rotating drive sleeve has a square countersunk hole at its upper end. A square connector is fixed to the lower end of the flexible drive shaft core and secured within the square countersunk hole by a radial pin. A screw hole is located at the center of the drive sleeve below the square countersunk hole, where a rust-removing rotating shaft is fixedly installed. A wear-resistant bushing is fitted between the positioning sleeve and the rust-removing rotating shaft. A retaining sleeve is fixedly installed within the inner cavity of the wheel frame sleeve below the positioning sleeve. The retaining sleeve has an external thread on its outer side and is fixedly installed within the threaded groove of the sleeve. The retaining sleeve is fixed to the wheel frame sleeve by a locking set screw. The lower end of the retaining sleeve is located outside the inner cavity of the wheel frame sleeve and has a wrench square hole. The rust-removing rotating shaft includes an upper neck and a rotating shaft step. The rotating shaft consists of an outer platform and a main body. The upper neck, step, outer platform, and main body are connected as a whole from top to bottom. The upper outer side of the upper neck is threaded and fixed in the screw hole of the drive sleeve. The step is fitted in the wear-resistant bushing and can rotate. The upper part of the outer platform is fitted in the positioning seat and can rotate. The lower part of the outer platform is fitted in the retaining sleeve and can rotate. The left and right sides of the main body are flattened to form a column with a flat round cross-section. The rotating brush head device is provided with a flat round core hole that matches the cross-sectional shape of the main body. The rotating brush head device is fixedly installed on the main body through the flat round core hole and the locking pin.

3. The rust removal device for the inner wall of a metal pipe according to claim 2, characterized in that: The outer side of the middle part of the sleeve nut is provided with a wrench slot, which is a pair of countersunk grooves on two opposite outer surfaces. The bottom surfaces of the pair of countersunk grooves are rectangular and parallel to each other.

4. The rust removal device for the inner wall of a metal pipe according to claim 3, characterized in that: The spring wheel frame includes a wheel frame seat, a wheel frame arm, a wheel frame slider, a wheel frame slide rail, a wheel frame spring groove, and a wheel frame spring. The outer side of the wheel frame seat is threaded and fixedly installed in the wheel frame seat screw hole of the wheel frame base. The inner cavity of the wheel frame seat has an inner cavity and a wheel frame arm is installed therein. The inner end of the wheel frame arm is fixedly connected to the wheel frame slider. The outer end of the wheel frame arm is fixed to a roller axle and a guide wheel is installed therein. The upper and lower sides of the inner cavity wall of the wheel frame seat have wheel frame slide rails. The wheel frame slider is installed in the wheel frame slide rails and can slide left and right. The inner end of the wheel frame slider has a wheel frame spring groove and a wheel frame spring is installed therein. The inner end of the wheel frame spring is pressed against the bottom surface of the inner cavity of the wheel frame seat.

5. A rust removal device for the inner wall of a metal pipe according to claim 1, 2, 3, or 4, characterized in that: The rotating brush head device includes a rotating brush sleeve and a spring brush holder. The rotating brush sleeve is fixedly mounted on the rust-removing rotating shaft. At least three brush holder bases are provided on the outer center of the rotating brush sleeve. These bases are evenly spaced around the outer circumference of the rotating brush sleeve. Each base has a brush holder screw hole inside and a spring brush holder is fixedly installed therein. The spring brush holder includes a brush holder seat, a brush holder arm, a brush holder slider, a brush holder slide rail, a brush holder spring groove, and a brush holder spring. The outer side of the brush holder seat is threaded and... The brush holder is fixedly installed in the screw hole of the brush holder base. The brush holder base has an inner cavity and a brush holder arm is installed inside. The inner end of the brush holder arm is fixedly connected to the brush holder slider. The outer end of the brush holder arm is fixed with a steel brush holder and a rust-removing steel brush. The upper and lower sides of the inner cavity wall of the brush holder base have brush holder slides. The brush holder slider is installed in the brush holder slide and can slide left and right. The inner end of the brush holder slider has a brush holder spring groove and a brush holder spring is installed. The inner end of the brush holder spring is pressed against the bottom surface of the inner cavity of the brush holder base.

6. A rust removal device for the inner wall of a metal pipe according to claim 1, 2, 3, or 4, characterized in that: Two rotating brush head devices are fixedly installed on the rust removal shaft. The two rotating brush head devices are arranged close together vertically, and the rust removal steel brushes on each rotating brush head device are arranged in a staggered manner.

7. A rust removal device for the inner wall of a metal pipe according to claim 5, characterized in that: Two rotating brush head devices are fixedly installed on the rust removal shaft. The two rotating brush head devices are arranged close together vertically, and the rust removal steel brushes on each rotating brush head device are arranged in a staggered manner.

8. A rust removal device for the inner wall of a metal pipe according to claim 1, 2, 3, 4, or 7, characterized in that: The lower end of the rust-removing rotary shaft is fitted with a rotary shaft end cap. The lower part of the rotary shaft end cap is semi-circular or smooth convex arc-shaped, and the center of the lower end of the rotary shaft end cap protrudes downward. The rotary shaft end cap is fixedly installed on the rust-removing rotary shaft by end cap screws.

9. A rust removal device for the inner wall of a metal pipe according to claim 5, characterized in that: The lower end of the rust-removing rotary shaft is fitted with a rotary shaft end cap. The lower part of the rotary shaft end cap is semi-circular or smooth convex arc-shaped, and the center of the lower end of the rotary shaft end cap protrudes downward. The rotary shaft end cap is fixedly installed on the rust-removing rotary shaft by end cap screws.

10. A rust removal device for the inner wall of a metal pipe according to claim 6, characterized in that: The lower end of the rust-removing rotary shaft is fitted with a rotary shaft end cap. The lower part of the rotary shaft end cap is semi-circular or smooth convex arc-shaped, and the center of the lower end of the rotary shaft end cap protrudes downward. The rotary shaft end cap is fixedly installed on the rust-removing rotary shaft by end cap screws.

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