Steel pipe inner wall cleaning device and cleaning process thereof

Abstract

The invention discloses a steel pipe inner wall cleaning device which comprises a first base used for installing a cleaning device body. The second base is used for placing a steel pipe to be cleaned; the positioning block is used for fixing the steel pipe to be cleaned on the second base; the cleaning rod extends into the steel pipe to clean the inner wall of the steel pipe; the transmission belt drives the cleaning rod to move back and forth; the cleaning disc is arranged on the cleaning rod; the material changing device is arranged at one end of the second base; the material changing device takes down 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 device has the advantage that the steel pipe is convenient to clean.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel pipe manufacturing, and particularly relates to a steel pipe inner wall cleaning device and its cleaning process. Background Art

[0002] A seamless steel pipe is a long steel bar with a hollow cross-section and no seams around. Due to the hollow cross-section of the steel pipe, the steel pipe is widely used as a pipeline for transporting fluids. Therefore, after the steel pipe is manufactured, it is necessary to manually wipe and clean the inner wall of the steel pipe to reduce the probability that impurities on the inner wall of the steel pipe have an adverse effect on the fluid to be transported subsequently.

[0003] For slender steel pipes, the manual method is generally to fix a rag at one end of a wire and then insert it into the steel pipe to clean the inner wall of the steel pipe. When the rag is taken out of the steel pipe, it will be contaminated with a lot of stains, and it is necessary to replace the rag taken out of the steel pipe each time, which is very inconvenient for cleaning the steel pipe. Summary of the Invention

[0004] The content part of this application is used to briefly introduce the concepts, which will be described in detail in the subsequent specific implementation part. The content part of this application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

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

[0006] To achieve the above object, the present invention adopts the following technical solutions: A steel pipe inner wall cleaning device includes: a first base for installing 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 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 provided on the cleaning rod; a feeding device provided at one end of the second base; the feeding device removes the cleaning disc on 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, the slots are provided on the side wall of the through holes, and the cleaning disc is wrapped with cleaning cotton.

[0008] Furthermore, the steel pipe inner wall cleaning device further includes: a movable rod penetrating through the cleaning rod; a fixing plate provided at one end of the movable rod; an end plate provided at the other end of the movable rod; a first return spring provided on the end plate; a baffle provided on the second base; the first return spring abuts against the cleaning rod, and the movable rod is provided with a connecting portion corresponding to the through hole.

[0009] Furthermore, the material changing device includes: a mounting rod, arranged above the second base; a cylinder, arranged on the mounting rod; a loading block, arranged on the piston rod of the cylinder; a connecting block, arranged on the loading block; and a connecting groove matching the connecting block is provided on the cleaning disk.

[0010] Furthermore, a first through slot for the connection block to move is provided on the loading block, and the connection block can extend from both ends of the first through slot respectively.

[0011] Furthermore, the material changing device also includes: a loading rack, arranged on one side of the loading block; a receiving tray, arranged on the other side of the loading block; a first slider, arranged on the loading rack; a first slide groove for the first slider to move is provided on the mounting rod, and the loading rack can hold multiple cleaning trays.

[0012] Furthermore, the material changing device also includes: a support rod, which is arranged on the loading rack; a second sliding block, which is arranged on the support rod; and a second sliding groove is arranged on the top of the loading rack for the second sliding block to move.

[0013] Furthermore, the material changing device also includes: a push rod, which is inserted into the second slide groove; a limit block, which fixes the push rod on the loading rack; a second through groove is provided on the side wall of the second slide groove for the push rod to move, and a first movable groove is provided on the side wall of the second through groove for the limit block to move. When the first sliding block moves to one end of the first slide groove, the limit 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 wire wheel, arranged on the first connecting rod; a connecting rope, one end of which is wound around the wire wheel and the other end is fixedly connected to one side of the material receiving plate; a third sliding groove is provided on the mounting rod for the first connecting rod to move; and the material receiving plate is rotatably connected to the first connecting rod.

[0015] The present application also provides a steel pipe cleaning process based on the above-mentioned steel pipe inner wall cleaning device, comprising the following steps: after the steel pipe is fixed on the positioning block, a cleaning disc soaked in cleaning liquid 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 of the steel pipe and then moves back to escape from the steel pipe, the cleaning disc on the cleaning rod of the material changing device is removed and a new cleaning disc is installed, the cleaning rod drives the cleaning disc into the steel pipe again until the cleaning disc extending from the steel pipe shows no obvious color change, and the cleaning of the steel pipe is completed.

[0016] The invention is beneficial in that it provides a steel pipe inner wall cleaning device and a cleaning process thereof which are convenient for cleaning the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0018] In addition, throughout the 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 and components are not necessarily drawn to scale.

[0019] In the drawings:

[0020] Figure 1 is a schematic structural view of the steel pipe inner wall cleaning device in an embodiment of the present invention.

[0021] Figure 2 is Figure 1 a schematic view of the second base and the material changing device of the steel pipe inner wall cleaning device in the shown embodiment.

[0022] Figure 3 is Figure 1 a schematic view of the cleaning disc of the steel pipe inner wall cleaning device in the shown embodiment.

[0023] Figure 4 is Figure 1 a sectional view of the second base of the steel pipe inner wall cleaning device in the shown embodiment.

[0024] Figure 5 is Figure 4 an enlarged view of part A in

[0025] Figure 6 is Figure 4 an enlarged view of part B in

[0026] Figure 7 is Figure 4 an enlarged view of part C in

[0027] Figure 8 is Figure 4 an enlarged view of part D in

[0028] Figure 9 is Figure 1 a sectional view of the push rod of the steel pipe inner wall cleaning device in the shown embodiment.

[0029] Figure 10 is Figure 9 an enlarged view of part E in

[0030] Figure 11 is Figure 1 a sectional view of the wire wheel of the steel pipe inner wall cleaning device in the shown embodiment.

[0031] Figure 12 is Figure 11 an enlarged view of part F in

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

[0033] 101. First base; 102. Positioning block; 103. Fixed screw; 104. Second base; 105. Movable block; 106. Cleaning rod; 107. Baffle; 108. Mounting rod; 1081. Support frame; 109. Cleaning disk; 1091. Groove; 1092. Cleaning cotton; 1093. Connecting groove; 110. Movable rod; 1101. Connecting part; 1102. Fixed plate; 1103. End plate; 111. Connecting rope; 112. Cleaning pool; 113. Support platform; 114. First return spring; 115. First driving wheel; 116. Transmission belt; 117. Cylinder; 118. Loading rack; 119. Receiving tray; 120. 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 driving wheel; 128. Third driving wheel; 129. Second transmission rod; 130. Fifth driving wheel; 131. Sixth driving wheel; 132. Thread wheel; 1321. Second convex block; 133. Connecting block; 134. Limiting block; 135. Moving rod; 1351. First convex block; 1352. Second return spring; 136. Third convex block. Detailed implementation manners

[0034] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0035] In addition, it should be noted that for the sake of convenience of description, only the parts related to the relevant invention are shown in the drawings. Without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.

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

[0037] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive. Those skilled in the art should understand that unless clearly stated otherwise in the context, it should be understood as "one or more".

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

[0039] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0040] As Figure 1-12 shown, a cleaning device for the inner wall of a steel pipe 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 for installing the cleaning device; the second base 104 is used for placing the steel pipe to be cleaned; the positioning block 102 is used for fixing 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 arranged on the cleaning rod 106; the material changing device is arranged 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 on the cleaning rod 106 and places a new cleaning disc 109 on the cleaning rod 106.

[0041] Specifically, an installation groove is provided on the second base 104, and two transmission wheels are arranged in the installation groove; the transmission belt 116 is wound around the two transmission wheels; a movable block 105 is further provided on the second base 104, the movable block 105 is connected to the transmission belt 116, the movable block 105 can move along the length direction of the second base 104, and the cleaning rod 106 is passed through the movable block 105 and fixedly connected to the movable block 105; a positioning hole is provided on the positioning block 102, a threaded hole communicating with the positioning hole is provided at the top of the positioning block 102, and a fixing screw 103 is passed through the threaded hole, and the fixing screw 103 forms a fit with the threaded hole through threads.

[0042] The cleaning disc 109 is provided with a through hole and a slot 1091, the slot 1091 is arranged on the side wall of the through hole, the cleaning disc 109 is wrapped with cleaning cotton 1092, and the cleaning cotton 1092 makes the diameter of the whole cleaning disc 109 slightly larger than that of the cleaning rod 106; a through cavity is provided on the cleaning rod 106, a movable rod 110 is passed through the through cavity, both ends of the movable rod 110 penetrate out of the through cavity, one end of the movable rod 110 is provided with a fixing plate 1102, the other end is provided with an end plate 1103, the diameter of the fixing plate 1102 is larger than that of the movable rod 110, a first return spring 114 is provided on the end plate 1103, the first return spring 114 abuts against the end face of the cleaning rod 106, and a connecting portion 1101 corresponding to the through hole is provided on the movable rod 110; a baffle 107 is provided at one end of the installation groove.

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

[0044] A loading rack 118 and a receiving tray 119 are further provided on the mounting rod 108. The loading rack 118 and the receiving tray 119 are respectively located on both sides of the loading block 120. The loading rack 118 has a U-shaped structure. Multiple cleaning disks 109 can be placed on the loading rack 118. A first slider 122 is provided on the loading rack 118, and a first sliding groove for the first slider 122 to move is provided on the bottom surface of the mounting rod 108. A support rod 123 is provided on the loading rack 118. A second slider 1231 is provided at the top of the support rod 123, and a second sliding groove for the second slider 1231 to move is provided at the top of the loading rack 118. A push rod 124 is inserted into the second sliding groove. 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 moving 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 moving groove. A first transmission rod 125 is provided on the second connecting rod 1242, and the first transmission rod 125 is inserted into the first moving cavity.

[0045] A second through groove is provided on the side wall of the second sliding groove. The push rod 124 is inserted into the second through groove. A first moving groove is provided on the side wall of the second through groove. A limiting block 134 is provided in the first moving groove. A limiting groove corresponding to the limiting block 134 is provided on the push rod 124. A moving cavity is provided on the side wall of the first moving groove. A moving rod 135 is provided in the moving cavity. A first convex block 1351 is provided on the moving rod 135. A second return spring 1352 is provided at one end of the moving rod 135. A third moving groove is provided on the first slider 122. A pushing block 126 is provided in the third moving groove. The pushing block 126 is connected to the moving rod 135. A third return spring 1261 is provided on the pushing block 126.

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

[0047] Furthermore, the first transmission rod 125 is provided with a first groove. A fourth transmission wheel 127 is arranged in the first groove. The second transmission rod 129 is provided with a second groove. A fifth transmission wheel 130 is arranged 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 is provided with a mounting cavity. A wire wheel 132 is arranged in the mounting cavity. A connecting rope 111 is wound around the wire wheel 132. One end of the connecting rope 111 is fixedly connected to one side of the material receiving tray 119. The second transmission rod 129 is provided with a third groove. The third groove is located at one end of the second transmission rod 129. A sixth transmission wheel 131 is arranged in the third groove. The sixth transmission wheel 131 is in transmission cooperation with the wire wheel 132. The wire wheel 132 is provided with a second convex block 1321. The inner wall of the mounting cavity is provided with a third convex block 136 to limit the maximum rotation angle of the wire wheel 132.

[0048] The side wall of the second base 104 is provided with a support platform 113. A cleaning pool 112 is arranged on the support platform 113. One end of the material receiving tray 119 is located above the cleaning pool 112.

[0049] The present application also provides a cleaning process for the inner wall of a steel pipe. Specifically, the steel pipe is inserted into the positioning hole, and the steel pipe is fixed on the positioning block 102 by the fixing screw 103. A cleaning disk 109 soaked with a cleaning liquid is installed on the cleaning rod 106. The rotation of the transmission belt 116 drives the movement of the movable block 105, and the cleaning rod 106 drives the cleaning disk 109 to move into the steel pipe. The cleaning cotton 1092 contacts the inner wall of the steel pipe, and the cleaning cotton 1092 wipes the inner wall of the steel pipe. The cleaning rod 106 drives the cleaning disk 109 to move from one end of the steel pipe to the other end and then move back, so that the cleaning disk 109 moves back and forth in the steel pipe. After the cleaning disk 109 is removed from the steel pipe, the transmission belt 116 continues to drive the movable block 105 to move. When the movable block 105 drives the cleaning rod 106 to move, the end plate 1103 abuts against the baffle 107, and the cleaning rod 106 moves relative to the movable rod 110. The fixing plate 1102 moves away from the cleaning disk 109 to disengage the cleaning disk 109. When the cleaning rod 106 is removed from the steel pipe, the third transmission wheel 128 rotates to drive the loading rack 118 and the receiving tray 119 to move towards the loading block 120. The limiting block 134 is located in the limiting groove, and the push rod 124 moves together with the loading rack 118. When the first slider 122 moves to one end of the first chute, the push block 126 abuts against the inner wall of the first chute, causing the push block 126 to move into the third moving groove. The push block 126 drives the moving rod 135 to move, and the first convex block 1351 moves away from one end of the limiting block 134. The limiting block 134 disengages from the limiting groove, and the push rod 124 moves relative to the loading rack 118. The support rod 123 pushes the cleaning disk 109 on the loading rack 118 towards the loading block 120. The cleaning disk 109 abuts against the loading block 120. The connecting block 133 extends from one end of the first through groove close to the loading rack 118 and inserts into the cleaning disk 109 on the loading rack 118 closest to the loading block 120. After the loading block 120 is connected to a cleaning disk 109, the third transmission wheel 128 rotates in the reverse direction to drive the loading rack 118 and the receiving tray 119 to move back. The cleaning disk 109 connected to the loading block 120 disengages from the loading rack 118. After the fixing plate 1102 and the cleaning disk 109 are disengaged, the cylinder 117 drives the loading block 120 to move downward. The loading block 120 drives the new cleaning disk 109 to move downward to the movable rod 110. The cleaning disk 109 originally on the movable rod 110 is located at a position close to one end of the cleaning rod 106. At this time, the new cleaning disk 109 and the old cleaning disk 109 are just on both sides of the loading block 120. The connecting block 133 extends from the other end of the first through groove, disconnecting the connection between the loading block 120 and the new cleaning disk 109 and forming a connection with the old cleaning disk 109. The cylinder 117 drives the loading block 120 to move upward, and the loading block 120 drives the old cleaning disk 109 to rise together. The transmission belt 116 drives the movable block 105 to move towards the steel pipe, and the cleaning rod 106 drives the cleaning disk 109 to enter 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 transmission wheel 128 repeats the above actions. When the connecting block 133 extends from one end of the first through groove close to the loading rack 118, it forms a connection with another new cleaning disc 109. At this time, the old cleaning disc 109 originally on the loading block 120 falls from the cleaning block onto the receiving tray 119. The cleaning disc 109 to be cleaned is temporarily on the receiving tray 119. After the third transmission wheel 128 drives the loading rack 118 and the receiving tray 119 to separate, it continues to drive the sixth transmission wheel 131 to rotate. The sixth transmission wheel 131 drives the wire wheel 132 to rotate, and the connecting rope 111 pulls one side of the receiving tray 119 to rise. The receiving tray 119 inclines towards the cleaning pool 112 to form an inclined plane, and the cleaning disc 109 on the receiving tray 119 falls into the cleaning pool 112. After the movable block 105 drives the cleaning rod 106 to reset, the fixing plate 1102 disengages from the cleaning disc 109, and the above actions are repeated to replace the cleaning disc 109 until there is no obvious color change on the cleaning cotton 1092 removed from the steel pipe, and then the cleaning of the steel pipe is completed.

[0050] After the third driving wheel 128 drives the material carrier 118 and the material receiving tray 119 to move closer to the material loading block 120, the fifth driving wheel 130 moves to one side of the third driving wheel 128. The third driving wheel 128 continues to rotate to drive the first driving rod 125 to continue moving. At the same time, the third driving wheel 128 drives the fifth driving wheel 130 to rotate, so that the support rod 123 pushes the cleaning tray 109 on the material carrier 118 to move towards the material carrier 118; the arrangement of the support rod 123 enables the cleaning tray 109 to fit on the material loading block 120 regardless of the number of cleaning trays 109 on the material carrier 118, so as to form a connection with the material loading block 120; when the third driving wheel 128 drives the material carrier 118 and the material receiving tray 119 to separate, since the fifth driving wheel 130 cannot rotate in the reverse direction, the third driving wheel 128 directly moves the second driving rod 129. After the first moving rod 135 moves to one end of the fourth moving groove, the sixth driving wheel 131 moves to one side of the third driving wheel 128. The third driving wheel 128 continues to rotate to drive the sixth driving wheel 131 to rotate. The sixth driving wheel 131 drives the wire wheel 132 to rotate to tilt the material receiving tray 119. At the same time, the third driving wheel 128 drives the first driving rod 125 to continue to reset. If the third driving wheel 128 is still rotating when the first driving rod 125 has been completely reset, the fourth driving wheel 127 moves to one side of the third driving wheel 128. The third driving wheel 128 drives the fourth driving wheel 127 to rotate, so that the third driving wheel 128 can still rotate normally; when the wire wheel 132 rotates, the second convex block 1321 rotates from one side of the third convex block 136 to the other side, and the wire wheel 132 stops rotating; when the third driving wheel 128 drives the material carrier 118 and the material receiving tray 119 to move closer to the material loading block 120 again, the third driving wheel 128 first drives the sixth driving wheel 131 to rotate so that the connecting rope 111 is wound out from the wire wheel 132. When the wire wheel 132 cannot rotate, the third driving wheel 128 drives the sixth driving wheel 131 to drive the second driving rod 129 to move together, realizing the function of automatically replacing the cleaning tray 109 on the cleaning rod 106.

[0051] The above description is only some preferred embodiments of the present disclosure and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the embodiments of the present disclosure that have similar functions.

Claims

1. A cleaning device for the inner wall of a steel pipe, comprising: A first base for installing 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 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; Characterized in that: The cleaning device for the inner wall of the steel pipe further comprises: A cleaning disc provided on the cleaning rod; A material changing device provided 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 on the cleaning rod and places a new cleaning disc on the cleaning rod.

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

3. The steel pipe inner wall cleaning device according to claim 2, wherein: Further comprising: A movable rod penetrating through the cleaning rod; A fixing plate provided at one end of the movable rod; An end plate provided at the other end of the movable rod; A first return spring provided on the end plate; A baffle provided on the second base; The first return spring abuts against the cleaning rod, and a connecting portion corresponding to the through hole is provided on the movable rod.

4. The steel pipe inner wall cleaning device according to claim 1, characterized in that: The material changing device comprises: An installation rod provided above the second base; A cylinder provided on the installation rod; A loading block provided on the piston rod of the cylinder; A connecting block provided on the loading block; The cleaning disc is provided with a connecting groove matching with the connecting block.

5. The steel pipe inner wall cleaning device according to claim 4, characterized in that: The loading block is provided with a first through groove for the connecting block to move, and the connecting block can extend out from both ends of the first through groove respectively.

6. The steel pipe inner wall cleaning device according to claim 4, wherein: The material changing device further comprises: A loading rack provided on one side of the loading block; A receiving tray provided on the other side of the loading block; A first slider provided on the loading rack; The installation rod is provided with a first sliding groove for the first slider to move, and the loading rack can place a plurality of cleaning discs.

7. The steel pipe inner wall cleaning device according to claim 6, characterized in that: The material changing device further comprises: A support rod provided on the loading rack; A second slider provided on the support rod; The top of the loading rack is provided with a second sliding groove for the second slider to move.

8. The steel pipe inner wall cleaning device according to claim 7, characterized in that: The material changing device further comprises: A push rod penetrating through the second sliding groove; A limit block for fixing the push rod on the loading rack; The side wall of the second sliding groove is provided with a second through groove for the push rod to move, and the side wall of the second through groove is provided with a first moving groove for the limit block to move. When the first slider moves to one end of the first sliding groove, the limit block enters the first moving groove.

9. The steel pipe inner wall cleaning device according to claim 6, characterized in that: The material changing device further comprises: A first connecting rod slidably connected to the installation rod; A wire wheel provided on the first connecting rod; A connecting rope, one end of which is wound around the wire wheel and the other end is fixedly connected to one side of the receiving plate; The installation rod is provided with a third sliding groove for the first connecting rod to move; the receiving plate is rotatably connected to the first connecting rod.

10. A steel pipe cleaning process based on the steel pipe inner wall cleaning device according to any one of claims 1-9, characterized in that: It includes the following steps: After fixing the steel pipe on the positioning block, install a cleaning disc dipped with cleaning liquid on the cleaning rod. The cleaning rod drives the cleaning disc into the steel pipe. After the cleaning disc moves from one end of the steel pipe to the other end and then moves back to take out from the steel pipe, remove the cleaning disc on the cleaning rod of the feeding device and install a new cleaning disc. The cleaning rod drives the cleaning disc into the steel pipe again until there is no obvious color change in the cleaning disc extending from the steel pipe, and the cleaning of the steel pipe is completed.

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