Steel pipe inner wall cleaning device and cleaning process thereof

Abstract

The application discloses a steel pipe inner wall cleaning device, which comprises a first base for mounting the cleaning device, a second base for placing a steel pipe to be cleaned, a positioning block for fixing the steel pipe to be cleaned on the second base, a cleaning rod for cleaning the inner wall of the steel pipe by extending into the steel pipe, a transmission belt for driving the cleaning rod to move back and forth, a cleaning disc arranged on the cleaning rod, and a material changing device arranged at one end of the second base; the material changing device removes the cleaning disc on the cleaning rod after the cleaning rod is moved out of the steel pipe, and places a new cleaning disc on the cleaning rod; the application has the advantages of facilitating the cleaning of the steel pipe.

Description

Technical Field

[0001] This invention belongs to the field of steel pipe manufacturing technology, and in particular relates to a steel pipe inner wall cleaning device and its cleaning process. Background Technology

[0002] Seamless steel pipe is a long strip of steel with a hollow cross-section and no seams around its perimeter. Because of its hollow cross-section, steel pipe is widely used as a pipeline for transporting fluids. Therefore, after the steel pipe is manufactured, the inner wall needs to be manually wiped and cleaned to reduce the probability that impurities on the inner wall will adversely affect the fluid being transported.

[0003] For slender steel pipes, the manual method usually involves fixing a rag to one end of a wire and inserting it into the pipe to clean the inner wall. When the rag is taken out of the pipe, it will be covered with a lot of dirt, and the rag needs to be replaced each time it is taken out of the pipe, making the cleaning of the steel pipe very inconvenient. Summary of the Invention

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a steel pipe inner wall cleaning device and its cleaning process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a steel pipe inner wall cleaning device, comprising: a first base for mounting the cleaning device; a second base for placing the steel pipe to be cleaned; a positioning block for fixing the steel pipe to be cleaned on the second base; a cleaning rod for extending into the steel pipe to clean the inner wall of the steel pipe; a transmission belt for driving the cleaning rod to move back and forth; a cleaning disc disposed on the cleaning rod; and a material changing device disposed at one end of the second base; the material changing device removes the cleaning disc from the cleaning rod after the cleaning rod is removed from the steel pipe and places a new cleaning disc on the cleaning rod.

[0007] Furthermore, the cleaning disc is provided with through holes and slots, with the slots located on the sidewalls of the through holes, and cleaning cotton is wrapped on the cleaning disc.

[0008] Furthermore, the steel pipe inner wall cleaning device also includes: a movable rod, which passes through the cleaning rod; a fixed plate, which is located at one end of the movable rod; an end plate, which is located at the other end of the movable rod; a first return spring, which is located on the end plate; and a baffle plate, which is located on the second base. The first return spring rests against the cleaning rod, and the movable rod is provided with a connecting part corresponding to the through hole.

[0009] Furthermore, the material changing device includes: a mounting rod, located above the second base; a cylinder, located on the mounting rod; a material carrying block, located on the piston rod of the cylinder; a connecting block, located on the material carrying block; and a connecting groove on the cleaning disc that mates with the connecting block.

[0010] Furthermore, the material block is provided with a first through groove for the connecting block to move, and the connecting block can extend from both ends of the first through groove.

[0011] Furthermore, the material changing device also includes: a material carrier frame located on one side of the material carrier block; a receiving tray located on the other side of the material carrier block; a first slider located on the material carrier frame; and a first sliding groove provided on the mounting rod for the first slider to move. The material carrier frame can hold multiple cleaning trays.

[0012] Furthermore, the material changing device also includes: a support rod, mounted on the material carrier; a second slider, mounted on the support rod; and a second groove at the top of the material carrier for the second slider to move.

[0013] Furthermore, the material changing device also includes: a push rod, which passes through the second slide groove; a limiting block, which fixes the push rod on the material carrier; a second through groove for the push rod to move on the side wall of the second slide groove, and a first movable groove for the limiting block to move on the side wall of the second through groove. When the first slider moves to one end of the first slide groove, the limiting block enters the first movable groove.

[0014] Furthermore, the material changing device also includes: a first connecting rod slidably connected to the mounting rod; a reel disposed on the first connecting rod; a connecting rope, one end of which is wound around the reel and the other end of which is fixed to one side of the receiving plate; a third sliding groove provided on the mounting rod for the first connecting rod to move; and the receiving plate rotatably connected to the first connecting rod.

[0015] This application also provides a steel pipe cleaning process based on the above-mentioned steel pipe inner wall cleaning device, including the following steps: after fixing the steel pipe on the positioning block, a cleaning disc soaked in cleaning fluid is installed on the cleaning rod. The cleaning rod drives the cleaning disc into the steel pipe. The cleaning disc moves from one end of the steel pipe to the other end and then moves back to detach from the steel pipe. After the cleaning disc on the cleaning rod of the material replacement device is removed, a new cleaning disc is installed. The cleaning rod drives the cleaning disc into the steel pipe again until the cleaning disc extending out of the steel pipe does not show obvious color change, thus completing the cleaning of the steel pipe.

[0016] The advantages of this invention are: it provides a steel pipe inner wall cleaning device and cleaning process that facilitates cleaning of steel pipes. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0018] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0019] In the attached diagram:

[0020] Figure 1 This is a schematic diagram of the steel pipe inner wall cleaning device in one embodiment of the present invention.

[0021] Figure 2 for Figure 1 A schematic diagram of the second base and the material changing device of the steel pipe inner wall cleaning device in the illustrated embodiment.

[0022] Figure 3 for Figure 1 A schematic diagram of the cleaning disc of the steel pipe inner wall cleaning device in the illustrated embodiment.

[0023] Figure 4 for Figure 1 A cross-sectional view of the second base of the steel pipe inner wall cleaning device in the illustrated embodiment.

[0024] Figure 5 for Figure 4 Enlarged view of point A in the image.

[0025] Figure 6 for Figure 4 Enlarged view of point B in the image.

[0026] Figure 7 for Figure 4 Enlarged view of point C in the image.

[0027] Figure 8 for Figure 4 Enlarged view of point D in the image.

[0028] Figure 9 for Figure 1 A cross-sectional view of the push rod of the steel pipe inner wall cleaning device in the illustrated embodiment.

[0029] Figure 10 for Figure 9 Enlarged view of point E in the image.

[0030] Figure 11 for Figure 1 A cross-sectional view of the wire reel of the steel pipe inner wall cleaning device in the illustrated embodiment.

[0031] Figure 12 for Figure 11 Enlarged view of point F in the image.

[0032] The meanings of the reference numerals in the figure are as follows:

[0033] 101. First base; 102. Positioning block; 103. Fixing screw; 104. Second base; 105. Movable block; 106. Cleaning rod; 107. Baffle; 108. Mounting rod; 1081. Support frame; 109. Cleaning tray; 1091. Groove; 1092. Cleaning cotton; 1093. Connecting groove; 110. Movable rod; 1101. Connecting part; 1102. Fixing plate; 1103. End plate; 111. Connecting rope; 112. Cleaning pool; 113. Support platform; 114. First return spring; 115. First transmission wheel; 116. Transmission belt; 117. Cylinder; 118. Material carrier; 119. Receiving tray; 20. Loading block; 121. First connecting rod; 122. First slider; 123. Support rod; 1231. Second slider; 124. Push rod; 1241. Push plate; 1242. Second connecting rod; 125. First transmission rod; 126. Push block; 1261. Third return spring; 127. Fourth transmission wheel; 128. Third transmission wheel; 129. Second transmission rod; 130. Fifth transmission wheel; 131. Sixth transmission wheel; 132. Thread wheel; 1321. Second protrusion; 133. Connecting block; 134. Limiting block; 135. Moving rod; 1351. First protrusion; 1352. Second return spring; 136. Third protrusion. Detailed Implementation

[0034] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0035] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0036] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0037] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0038] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.

[0039] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] like Figure 1-12 As shown, a steel pipe inner wall cleaning device includes a first base 101, a second base 104, a positioning block 102, a cleaning rod 106, a transmission belt 116, a cleaning disc 109, and a material changing device. The first base 101 is used to install the cleaning device; the second base 104 is used to place the steel pipe to be cleaned; the positioning block 102 is used to fix the steel pipe to be cleaned on the second base 104; the cleaning rod 106 can extend into the steel pipe to clean the inner wall of the steel pipe; the transmission belt 116 drives the cleaning rod 106 to move back and forth; the cleaning disc 109 is disposed on the cleaning rod 106; the material changing device is disposed at one end of the second base 104; after the cleaning rod 106 is removed from the steel pipe, the material changing device removes the cleaning disc 109 from the cleaning rod 106 and places a new cleaning disc 109 on the cleaning rod 106.

[0041] Specifically, the second base 104 is provided with a mounting groove, and two drive wheels are provided in the mounting groove. The drive belt 116 is wound around the two drive wheels. The second base 104 is also provided with a movable block 105, which is connected to the drive belt 116. The movable block 105 can move along the length of the second base 104. The cleaning rod 106 passes through the movable block 105 and is fixed to the movable block 105. The positioning block 102 is provided with a positioning hole, and the top of the positioning block 102 is provided with a threaded hole communicating with the positioning hole. A fixing screw 103 passes through the threaded hole, and the fixing screw 103 is engaged with the threaded hole through the thread.

[0042] The cleaning disc 109 has a through hole and a slot 1091. The slot 1091 is located on the side wall of the through hole. The cleaning disc 109 is wrapped with cleaning cotton 1092, which makes the diameter of the entire cleaning disc 109 slightly larger than that of the cleaning rod 106. The cleaning rod 106 has a through cavity, and a movable rod 110 passes through the through cavity. Both ends of the movable rod 110 protrude from the through cavity. One end of the movable rod 110 has a fixing plate 1102, and the other end has an end plate 1103. The diameter of the fixing plate 1102 is larger than that of the movable rod 110. The end plate 1103 has a first return spring 114, which abuts against the end face of the cleaning rod 106. The movable rod 110 has a connecting part 1101 corresponding to the through hole. One end of the mounting groove has a baffle 107.

[0043] The material changing device includes a mounting rod 108, a cylinder 117, a material carrier block 120, and a connecting block 133. Support frames 1081 are provided at both ends of the mounting rod 108, providing support for the mounting rod 108. The cylinder 117 is fixedly connected to the bottom of the mounting frame, and the material carrier block 120 is fixedly connected to the piston rod of the cylinder 117. A first through groove is provided on the material carrier block 120, and the connecting block 133 is located within the first through groove. The connecting block 133 can move within the first through groove but cannot be completely removed from it. Both ends of the connecting block 133 can be removed from both ends of the first through groove. The movement of the connecting block 133 is achieved by a motor. A connecting groove 1093 corresponding to the connecting block 133 is provided on the cleaning disc 109.

[0044] The mounting rod 108 is also equipped with a material carrier 118 and a receiving tray 119, which are located on both sides of the material block 120. The material carrier 118 has a U-shaped structure and can hold multiple cleaning trays 109. The material carrier 118 is equipped with a first slider 122, and the bottom surface of the mounting rod 108 is provided with a first groove for the first slider 122 to move. The material carrier 118 is equipped with a support rod 123, and the top of the support rod 123 is provided with a second slider 123. 1. The top of the material carrier 118 is provided with a second slide groove for the second slider 1231 to move; a push rod 124 is provided in the second slide groove, and a push plate 1241 is provided at one end of the push rod 124; a second connecting rod 1242 is provided on the push rod 124, and a second movable groove for the second connecting rod 1242 to move is provided on the mounting rod 108. A first transmission cavity is provided on the side wall of the second movable groove, and a first transmission rod 125 is provided on the second connecting rod 1242. The first transmission rod 125 passes through the first movable cavity.

[0045] The second slide has a second through groove on its side wall, and the push rod 124 passes through the second through groove. The second through groove has a first movable groove on its side wall, and a limiting block 134 is provided in the first movable groove. The push rod 124 has a limiting groove corresponding to the limiting block 134. The first movable groove has a movable cavity on its side wall, and a moving rod 135 is provided in the movable cavity. The moving rod 135 has a first protrusion 1351, and a second return spring 1352 is provided at one end of the moving rod 135. The first slider 122 has a third movable groove, and a push block 126 is provided in the third movable groove. The push block 126 is connected to the moving rod 135, and a third return spring 1261 is provided on the push block 126.

[0046] The receiving tray 119 is provided with a first connecting rod 121, and the receiving tray 119 is rotatably connected to the first connecting rod 121. The receiving tray 119 is provided with an inclined surface. The mounting rod 108 is provided with a fourth movable groove for the first connecting rod 121 to move. The side wall of the fourth movable groove is provided with a second transmission cavity. The first connecting rod 121 is provided with a second transmission rod 129, which passes through the second transmission cavity. The mounting rod 108 is provided with a cavity that communicates with the first transmission cavity and the second transmission cavity. A third transmission wheel 128 is provided in the cavity.

[0047] Furthermore, the first transmission rod 125 has a first groove, and a fourth transmission wheel 127 is provided in the first groove. The second transmission rod 129 has a second groove, and a fifth transmission wheel 130 is provided in the second groove. Both the fourth transmission wheel 127 and the fifth transmission wheel 130 can only rotate in one direction, and the rotation directions of the fourth transmission wheel 127 and the fifth transmission wheel 130 are opposite. The first connecting rod 121 has a mounting cavity, and a spool 132 is provided in the mounting cavity. A connecting rope 111 is wound around the spool 132, and one end of the connecting rope 111 is fixed to one side of the receiving tray 119. The second transmission rod 129 has a third groove, which is located at one end of the second transmission rod 129. A sixth transmission wheel 131 is provided in the third groove, and the sixth transmission wheel 131 is in transmission cooperation with the spool 132. The spool 132 has a second protrusion 1321, and a third protrusion 136 is provided on the inner wall of the mounting cavity to limit the maximum angle of rotation of the spool 132.

[0048] The second base 104 has a support platform 113 on its side wall, and a cleaning tank 112 is provided on the support platform 113. One end of the receiving tray 119 is located above the cleaning tank 112.

[0049] This application also provides a cleaning process for the inner wall of a steel pipe. Specifically, the steel pipe is inserted into a positioning hole and fixed to a positioning block 102 using a fixing screw 103. A cleaning disc 109, soaked in cleaning fluid, is mounted on a cleaning rod 106. The drive belt 116 rotates, driving the movable block 105 to move. The cleaning rod 106 drives the cleaning disc 109 to move into the steel pipe, where the cleaning cotton 1092 contacts the inner wall of the steel pipe and wipes it. The cleaning rod 106 drives the cleaning disc 109 to move from one end of the steel pipe to the other and then back, so that the cleaning disc 109 moves back and forth inside the steel pipe. After the cleaning disc 109 is removed from the steel pipe, the drive belt 116 continues to drive the movable block 105 to continue moving. When the movable block 105 moves the cleaning rod 106, the end plate 1103 abuts against the baffle 107. The cleaning rod 106 moves relative to the movable rod 110, and the fixed plate 1102 moves away from the cleaning disc 109, disengaging the cleaning disc 109. When the cleaning rod 106 comes out of the steel pipe, the third transmission wheel 128 rotates, driving the material carrier 118 and the receiving disc 119 to move towards the material carrier 120. The limiting block 134 is in the limiting groove, and the push rod 124 moves together with the material carrier 118. When the first slider 122 moves to one end of the first slide groove, the push block 126 abuts against the inner wall of the first slide groove, causing the push block 126 to move into the third movable groove. The push block 126 drives the moving rod 135 to move, and the first protrusion 1351 moves away from one end of the limiting block 134, thus limiting the movement. Block 134 disengages from the limiting groove, push rod 124 moves relative to the loading frame 118, support rod 123 pushes cleaning disc 109 on the loading frame 118 toward the loading block 120, cleaning disc 109 abuts against the loading block 120, connecting block 133 extends from the end of the first through groove near the loading frame 118 and inserts into the cleaning disc 109 on the loading frame 118 closest to the loading block 120, after the loading block 120 is connected to a cleaning disc 109, the third transmission wheel 128 rotates in the opposite direction to drive the loading frame 118 and receiving disc 119 to move back, and the cleaning disc 109 connected to the loading block 120 disengages from the loading frame 118; after the fixing plate 1102 and the cleaning disc 109 disengage, cylinder 117 drives the loading block 120 toward As the material block 120 moves downward, it drives the new cleaning disc 109 to move downward onto the movable rod 110. The cleaning disc 109, which was originally on the movable rod 110, is now positioned to be in contact with one end of the cleaning rod 106. At this point, the new cleaning disc 109 and the old cleaning disc 109 are positioned on both sides of the material block 120. The connecting block 133 extends from the other end of the first through slot, causing the material block 120 to disengage from the new cleaning disc 109 and connect with the old cleaning disc 109. The cylinder 117 drives the material block 120 to move upward, causing the material block 120 to lift along with the old cleaning disc 109. The transmission belt 116 drives the movable block 105 to move towards the steel pipe, and the cleaning rod 106 drives the cleaning disc 109 into the steel pipe to continue cleaning the steel pipe.When the conveyor belt drives the cleaning rod 106 to move out of the steel pipe, the third drive wheel 128 repeats the above action. When the connecting block 133 extends from the end of the first through slot near the material carrier 118, it connects with another new cleaning disc 109. At this time, the old cleaning disc 109, which was originally on the material carrier 120, falls off the cleaning block onto the receiving disc 119. The cleaning disc 109 to be cleaned is temporarily placed on the receiving disc 119. After the third drive wheel 128 drives the material carrier 118 and the receiving disc 119 to separate, it continues to drive the sixth drive wheel 131 to rotate. The sixth transmission wheel 131 drives the reel 132 to rotate, and the connecting rope 111 pulls one side of the receiving tray 119 to rise. The receiving tray 119 tilts towards the cleaning tank 112 to form an inclined plane, and the cleaning tray 109 on the receiving tray 119 falls into the cleaning tank 112. After the movable block 105 drives the cleaning rod 106 to reset, the fixed plate 1102 disengages from the cleaning tray 109. The above actions are repeated to replace the cleaning tray 109 until there is no obvious color change on the cleaning cotton 1092 removed from the steel pipe, thus completing the cleaning of the steel pipe.

[0050] After the third drive wheel 128 drives the material rack 118 and the receiving tray 119 to move closer to the material block 120, the fifth drive wheel 130 moves to the side of the third drive wheel 128. The third drive wheel 128 continues to rotate, driving the first drive rod 125 to continue moving. At the same time, the third drive wheel 128 drives the fifth drive wheel 130 to rotate, causing the support rod 123 to push the cleaning tray 109 on the material rack 118 to move towards the material rack 118. The support rod 123 is used to ensure that no matter how many materials are on the material rack 118... The cleaning disc 109 can adhere to the material carrier block 120 to form a connection; when the third drive wheel 128 drives the material carrier 118 and the receiving disc 119 to separate, since the fifth drive wheel 130 cannot rotate in the opposite direction, the third drive wheel 128 moves directly to the second drive rod 129. After the first moving rod 135 moves to one end of the fourth movable groove, the sixth drive wheel 131 moves to one side of the third drive wheel 128, and the third drive wheel 128 continues to rotate to drive the sixth drive wheel 129. 31 rotates, the sixth transmission wheel 131 drives the reel 132 to rotate, causing the receiving tray 119 to tilt. At the same time, the third transmission wheel 128 drives the first transmission rod 125 to continue resetting. If the first transmission rod 125 has been completely reset and the third transmission wheel 128 is still rotating, the fourth transmission wheel 127 moves to one side of the third transmission wheel 128. The third transmission wheel 128 drives the fourth transmission wheel 127 to rotate, so that the third transmission wheel 128 can still rotate normally. When the reel 132 rotates, the second protrusion 1321 moves from the third protrusion 13... When one side of the 6 rotates to the other side, the spool 132 stops rotating; when the third transmission wheel 128 drives the material carrier 118 and the receiving tray 119 to move closer to the material block 120, the third transmission wheel 128 first drives the sixth transmission wheel 131 to rotate so that the connecting rope 111 is wound off the spool 132. When the spool 132 can no longer rotate, the third transmission wheel 128 drives the sixth transmission wheel 131 to move the second transmission rod 129 together, so as to realize the function of automatically replacing the cleaning tray 109 on the cleaning rod 106.

[0051] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A steel pipe inner wall cleaning device, comprising: The first base is used to mount the cleaning device; The second base is used to hold the steel pipes to be cleaned; The positioning block is used to fix the steel pipe to be cleaned onto the second base; The cleaning rod is inserted into the steel pipe to clean the inner wall of the pipe. The drive belt drives the cleaning rod to move back and forth; Its features are: The steel pipe inner wall cleaning device also includes: A cleaning disc is mounted on the cleaning rod; A material changing device is located at one end of the second base; After the cleaning rod is removed from the steel pipe, the material changing device removes the cleaning disc from the cleaning rod and places a new cleaning disc on the cleaning rod. The material changing device includes: The mounting rod is located above the second base; A cylinder is mounted on the mounting rod; A material carrier block is mounted on the piston rod of the cylinder; A connecting block is provided on the material carrier block; The cleaning disc is provided with a connecting groove that mates with the connecting block; The material block is provided with a first through groove for the connecting block to move, and the connecting block can extend from both ends of the first through groove respectively; The material changing device also includes: A material carrier rack is located on one side of the material carrier block; A receiving tray is located on the other side of the material carrying block; The first slider is disposed on the material carrier; The mounting rod is provided with a first groove for the first slider to move, and the material rack can hold multiple cleaning trays; The material changing device also includes: Support rods are provided on the material carrier rack; The second slider is disposed on the support rod; The top of the material carrier is provided with a second slide groove for the second slider to move; The material changing device also includes: The push rod passes through the second groove; A limiting block fixes the push rod onto the material carrier; The second slide groove sidewall is provided with a second through groove for the push rod to move, and the second through groove sidewall is provided with a first movable groove for the limiting block to move. When the first slider moves to one end of the first slide groove, the limiting block enters the first movable groove.

2. The steel pipe inner wall cleaning device according to claim 1, characterized in that: The cleaning disc has through holes and slots, with the slots located on the sidewalls of the through holes, and cleaning cotton is wrapped around the cleaning disc.

3. The steel pipe inner wall cleaning device according to claim 2, characterized in that: Also includes: A movable rod is inserted through the cleaning rod; A fixed plate is provided at one end of the movable rod; An end plate is located at the other end of the movable rod; A first return spring is disposed on the end plate; A baffle is provided on the second base; The first return spring rests against the cleaning rod, and the movable rod is provided with a connecting part corresponding to the through hole.

4. The steel pipe inner wall cleaning device according to claim 1, characterized in that: The material changing device also includes: The first connecting rod is slidably connected to the mounting rod; A reel is mounted on the first connecting rod; The connecting rope has one end wound around the reel and the other end fixed to one side of the receiving tray; The mounting rod is provided with a third sliding groove for the first connecting rod to move; the receiving tray is rotatably connected to the first connecting rod.

5. A steel pipe cleaning process based on a steel pipe inner wall cleaning device as described in any one of claims 1-4, characterized in that: The process includes the following steps: After fixing the steel pipe to the positioning block, a cleaning disc soaked in cleaning fluid is installed on the cleaning rod. The cleaning rod drives the cleaning disc into the steel pipe. The cleaning disc moves from one end of the steel pipe to the other end and then moves back to detach from the steel pipe. The material changing device removes the cleaning disc from the cleaning rod and installs a new cleaning disc. The cleaning rod drives the cleaning disc into the steel pipe again until the cleaning disc extending from the steel pipe no longer shows obvious color change, thus completing the cleaning of the steel pipe.

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