Steel pipe inside and outside cleaning device

Abstract

According to the steel pipe inside and outside cleaning device, an inner cleaning mechanism, an outer cleaning mechanism and a fixing mechanism are arranged on a bottom plate, a steel pipe is fixed through the fixing mechanism, a plug block storage and transportation assembly of the inner cleaning mechanism conveys a plug block to the position of a plug block positioning assembly, and the plug block slides into the plug block positioning assembly; a pneumatic assembly pushes a plug block into a port of a steel pipe, then the plug block is blown out through high-pressure airflow, the plug block is attached to the inner wall of the steel pipe to move to bring out impurities on the inner wall of the steel pipe, and therefore the inner wall of the steel pipe is cleaned, and the outer cleaning mechanism clamps the steel pipe through a mechanical claw and moves left and right on the surface of the steel pipe to scrape away the impurities on the surface of the steel pipe. The inner cleaning mechanism is low in energy consumption and high in cleaning efficiency, and the size of a plug block can be changed according to the diameter of the steel pipe.

Description

Technical Field

[0001] This invention belongs to the field of steel pipe processing technology, and specifically relates to a steel pipe internal and external cleaning device. Background Technology

[0002] During the processing of steel pipes, it is necessary to clean impurities both inside and outside the pipe. External cleaning is relatively easy, but internal cleaning requires the use of cleaning equipment. Due to the length and diameter of the steel pipe, general cleaning equipment is difficult to use. Therefore, most existing cleaning equipment uses water washing for cleaning. However, water washing can easily leave residual moisture inside the pipe, so the steel pipe needs to be dried, resulting in high processing costs and energy consumption. Therefore, this application adopts a pneumatic plug method to clean impurities inside the steel pipe, thereby improving cleaning efficiency and controlling processing costs. Summary of the Invention

[0003] The purpose of this invention is to provide a steel pipe internal and external cleaning device. An internal cleaning mechanism, an external cleaning mechanism, and a fixing mechanism are provided on a base plate. The fixing mechanism secures the steel pipe. The internal cleaning mechanism's plug storage and transport component transports the plug to the plug positioning component, where the plug slides into the component. A pneumatic component pushes the plug into the steel pipe port, and a high-pressure airflow blows it out. The plug moves against the inner wall of the steel pipe, carrying away impurities and thus cleaning the inner wall. The external cleaning mechanism uses mechanical claws to grip the steel pipe and move it left and right on the surface, scraping away impurities.

[0004] This invention is achieved through the following technical solution: A steel pipe internal and external cleaning device includes a fixing mechanism, an internal cleaning mechanism, an external cleaning mechanism, and a base plate. The internal cleaning mechanism, external cleaning mechanism, and fixing mechanism are all mounted on the base plate. The fixing mechanism is used to clamp and fix the steel pipe. The internal cleaning mechanism is located at one end of the fixing mechanism and between the external cleaning mechanism and the fixing mechanism. The internal cleaning mechanism faces the end of the steel pipe and is used for cleaning the inner surface of the steel pipe. The external cleaning mechanism is spaced apart from the internal cleaning mechanism and is used for cleaning the outer surface of the steel pipe.

[0005] Preferably, the internal cleaning mechanism includes a pneumatic component, a plug storage and conveying component, and a plug positioning component. The plug positioning component is disposed on one side of the fixing mechanism and connected to the end of the steel pipe. The pneumatic component is disposed behind the plug positioning component and connected to it. The plug storage and conveying component is disposed behind the pneumatic component and extends from above it to the position of the plug positioning component. The plug storage and conveying component is used to store and convey plugs to the position of the plug positioning component. The plug positioning component is used to position the plugs. The pneumatic component is used to push the plugs into the steel pipe and blow them out of the steel pipe using high-pressure airflow.

[0006] Preferably, the plug positioning assembly includes a support block, a positioning plate, a motor box, four guide rods, and two support rods. The support block is connected to a base plate, and the positioning plate is mounted on the support block. The positioning plate has a U-shaped structure, and its side is aligned with the end of the steel pipe. The two support rods are respectively positioned on the left and right sides of the support block. The motor box is located above the positioning plate and is fixed by the two support rods. The four guide rods pass through the four corners of the motor box and abut against the four corners of the positioning plate. The motor box contains a reduction motor and a gear set. The guide rods have protruding teeth on their sides, which cooperate with the gear set. The reduction motor drives the four guide rods to move up and down. Limiting plates are provided between the two guide rods near the end of the steel pipe and the two guide rods away from the end of the steel pipe. The limiting plates are spaced apart from the motor box and are used to limit the movement of the plug.

[0007] Preferably, the plug storage and conveying assembly includes a conveyor belt and a plug storage box; one end of the conveyor belt is located in the plug storage box, and the other end is connected to the space between two guide rods of the motor box; the plug storage box is used to store and push plugs, and the conveyor belt is used to convey the plugs to the guide rods and drop the plugs onto the positioning plate, where the plugs are limited by two limiting plates.

[0008] Preferably, the pneumatic assembly includes a support platform, an electric push rod, a mounting block, an impact cylinder, and a guide tube. The electric push rod and the mounting block are both mounted on the support platform. The end of the electric push rod is connected to the mounting block, and the mounting block is slidably connected to the support platform. The impact cylinder is mounted on the mounting block, and the guide tube is located at the air outlet of the impact cylinder. The electric push rod drives the mounting block to move toward the steel pipe, the four guide rods move upward, the guide tube pushes the plug into the end of the steel pipe, and the impact cylinder releases high-pressure airflow to push the plug to slide rapidly on the inner wall of the steel pipe and slide out from the opposite side of the steel pipe.

[0009] Preferably, the bottom of the mounting block is provided with a sliding groove, and the support platform is provided with a protrusion, the protrusion cooperating with the sliding groove to limit the position of the mounting block.

[0010] Preferably, the external cleaning mechanism includes a horizontal rail, a mechanical claw, and two lifting slides. Both ends of the horizontal rail are connected to the two lifting slides respectively, and the mechanical claw is mounted on the horizontal rail. The lifting slide includes a housing, a first stepper motor, a longitudinal lead screw, and a connecting member. The first stepper motor is located at the bottom of the housing and connected to the side wall of the housing. One end of the longitudinal lead screw is connected to the first stepper motor, and the other end is connected to the top of the housing through a bearing. A first slide rail is provided on the side of the housing. One end of the connecting member is sleeved on the longitudinal lead screw and threadedly connected to the longitudinal lead screw. The other end of the connecting member extends from the first slide rail and connects to the horizontal rail. The two stepper motors move synchronously to drive the horizontal rail to move up and down. The horizontal rail is used to drive the mechanical claw to move left and right.

[0011] Preferably, a transverse lead screw is provided in the transverse rail, a second stepper motor is provided at one end of the transverse rail, one end of the transverse lead screw is connected to the second stepper motor, and the other end is connected to the other end of the transverse rail through a bearing. A second slide rail is provided at the top of the transverse rail, one end of the mechanical claw is threadedly connected to the transverse lead screw inside the transverse rail, and the other end of the mechanical claw is located below the transverse rail.

[0012] Preferably, the end of the mechanical claw includes a gripping part, which is a split-type opening and closing structure, and the gripping part abuts against the outer surface of the steel pipe after being closed.

[0013] Preferably, the fixing mechanism includes two opposing fixing components. Each fixing component includes a vertical block, a pressing block, a fixing plate, a thrust cylinder, and four guide rods. The vertical block is connected to the base plate. The fixing plate is positioned above the vertical block via the four guide rods. The pressing block is positioned between the vertical block and the fixing plate, with the guide rods passing through the pressing block. The thrust cylinder is positioned above the fixing plate, with its push rod end passing through the fixing plate and connecting to the pressing block. The vertical block has a first abutment groove, and the pressing block has a second abutment groove. The first and second abutment grooves cooperate to fix the steel pipe.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1) In this invention, an inner cleaning mechanism, an outer cleaning mechanism, and a fixing mechanism are provided on the base plate. The steel pipe is fixed by the fixing mechanism. The plug storage and transportation component of the inner cleaning mechanism transports the plug to the position of the plug positioning component. The plug slides into the plug positioning component. The plug is pushed into the steel pipe port by the pneumatic component. Then, the plug is blown out by the high-pressure airflow. The plug moves against the inner wall of the steel pipe, carrying out the impurities on the inner wall of the steel pipe, thereby achieving the cleaning of the inner wall of the steel pipe. The outer cleaning mechanism uses a mechanical claw to hold the steel pipe and move left and right on the surface of the steel pipe to scrape off the impurities on the surface of the steel pipe. The inner cleaning mechanism has low energy consumption, high cleaning efficiency, and the size of the plug can be changed according to the diameter of the steel pipe.

[0015] 2) In this invention, the steel pipe is fixed by a fixing mechanism. After the steel pipe is fixed, its inside and outside can be cleaned separately. There is no need to transfer or reposition the steel pipe, which avoids secondary pollution and bumps during the transfer process and further improves processing efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the steel pipe internal and external cleaning device in this invention.

[0018] Figure 2 This is a schematic diagram of the block positioning component in this invention.

[0019] Figure 3 This is a schematic diagram of the external cleaning mechanism in this invention.

[0020] The components are: 1-base plate, 2-block positioning assembly, 21-support block, 22-positioning plate, 23-support rod, 24-motor box, 25-guide rod, 26-limiting plate, 3-pneumatic assembly, 31-support platform, 32-electric push rod, 33-mounting block, 34-impact cylinder, 35-guide tube, 4-block storage and conveying assembly, 41-block storage box, 42-conveyor belt, 43-block, 5-external cleaning mechanism, 51-lifting slide, 511-first slide, 52-horizontal rail, 521-second slide, 53-mechanical claw, 531-gripping part, 54-second stepper motor, 6-fixing assembly, 61-standing block, 62-pressing block, 63-fixing plate, 64-guide rod, 65-thrust cylinder. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0022] Example 1: A steel pipe internal and external cleaning device, such as Figure 1 and Figure 2As shown, the system includes a fixing mechanism, an inner cleaning mechanism, an outer cleaning mechanism 5, and a base plate 1. The inner cleaning mechanism, outer cleaning mechanism 5, and fixing mechanism are all mounted on the base plate 1. The fixing mechanism clamps and fixes the steel pipe. The inner cleaning mechanism is located at one end of the fixing mechanism, between the outer cleaning mechanism 5 and the fixing mechanism, and faces the end of the steel pipe. The inner cleaning mechanism is used for cleaning the inner surface of the steel pipe. The outer cleaning mechanism 5 is spaced apart from the inner cleaning mechanism and is used for cleaning the outer surface of the steel pipe. The inner cleaning mechanism includes a pneumatic component 3, a plug storage and conveying component 4, and a plug positioning component 2. The plug positioning component 2 is located on one side of the fixing mechanism and connects to one end of the steel pipe. The pneumatic component 3 is located behind the plug positioning component 2 and connects to it. The plug storage and conveying component 4 is located behind the pneumatic component 3 and extends from above the pneumatic component 3 to the position of the plug positioning component 2. A plug 43 is located in the plug storage and conveying component 4. The plug 43 has a disc-shaped structure. Made of rubber material, with chamfered ends, the diameter of the plug 43 matches the inner diameter of the steel pipe; the plug storage and conveying assembly 4 is used to store and convey the plug 43 to the position of the plug positioning assembly 2, the plug positioning assembly 2 is used to position the plug 43, and the pneumatic assembly 3 is used to push the plug 43 into the steel pipe and blow the plug 43 out of the steel pipe by high-pressure airflow, so that the plug 43 slides against the inner wall of the steel pipe and scrapes off the impurities attached to the inner wall of the steel pipe.

[0023] The plug positioning assembly 2 includes a support block 21, a positioning plate 22, a motor box 24, four guide rods 25, and two support rods 23. The support block 21 is connected to the base plate 1. The positioning plate 22 is mounted on the support block 21 and has a U-shaped structure, with its side abutting the end of the steel pipe. The support block 21 is welded to the base plate 1, fixing and supporting the positioning plate 22 so that it abuts the pipe opening. The two support rods 23 are respectively positioned on the left and right sides of the support block 21. The motor box 24 is located above the positioning plate 22 and is fixed by the two support rods 23. The support rods 23 are welded to the base plate 1 and the motor box 24 so that the motor box 24 is directly above the positioning plate 22. The four guide rods 25 pass through the four corners of the motor box 24 and abut against the four corners of the positioning plate 22. The motor box 24 contains a reduction motor and gears. The guide rod 25 has protruding teeth on its side, which cooperate with the gear set. The gear set is driven by the rotation of the reduction motor. The guide rod 25 meshes with the gear set, thereby driving the four guide rods 25 to move up and down synchronously. Limiting plates 26 are provided between the two guide rods 25 near the end of the steel pipe and the two guide rods 25 away from the end of the steel pipe. The top of the limiting plate 26 away from the end of the steel pipe is inclined, and the inclined surface is inclined towards the limiting plate 26 on the opposite side. The limiting plates 26 are spaced apart from the motor box 24. The plug 43 falls from between the guide rods 25 into the two limiting plates 26. The inclined surface facilitates the sliding of the plug 43. The two limiting plates 26 cooperate to limit the plug 43, so that the plug 43 remains upright on the positioning plate 22. The U-shaped structure of the positioning plate 22 fits against the edge of the plug 43, so that the plug 43 can stand stably on the positioning plate 22.

[0024] The block storage and conveying assembly 4 includes a conveyor belt 42 and a block storage box 41; one end of the conveyor belt 42 is located in the block storage box 41, and the other end is connected to the two guide rods 25 of the motor box 24; the block storage box 41 is used to store and push the block 43, and a pushing mechanism is provided in the block storage box 41 to push the block 43 onto the conveyor belt 42. The conveyor belt 42 is used to transport the block 43 to the guide rods 25 and make the block 43 fall onto the positioning plate 22. The block 43 is limited on the positioning plate 22 by two limiting plates 26.

[0025] The pneumatic assembly 3 includes a support platform 31, an electric push rod 32, a mounting block 33, an impact cylinder 34, and a guide tube 35. The electric push rod 32 and the mounting block 33 are both mounted on the support platform 31. The support platform 31 is welded to the base plate 1. The moving end of the electric push rod 32 is welded to the mounting block 33. The mounting block 33 is slidably connected to the support platform 31. The bottom of the mounting block 33 is provided with a sliding groove. The support platform 31 is provided with a protrusion. The protrusion and the sliding groove cooperate to limit the position of the mounting block 33. Impact cylinder 34 is located on the side of mounting block 33, facing the end of the steel pipe. Guide tube 35 is located at the air outlet of impact cylinder 34. Electric push rod 32 drives mounting block 33 to move towards the steel pipe. At this time, four guide rods 25 drive positioning plate 22 to move upward. The plug 43 is coaxial with the steel pipe. Guide tube 35 pushes plug 43 into the end of the steel pipe. After plug 43 enters the end of the steel pipe, impact cylinder 34 releases high-pressure airflow to push plug 43 to slide quickly on the inner wall of the steel pipe and slide out from the opposite side of the steel pipe. A receiving box is set on the bottom plate 1 on the opposite side of the steel pipe. Plug 43 flies into the receiving box for recycling, completing the cleaning of the inner wall of the steel pipe.

[0026] Example 2: This embodiment, based on the above embodiment, further defines the external cleaning mechanism 5, such as... Figure 1 and Figure 3 As shown, the external cleaning mechanism 5 includes a horizontal rail 52, a mechanical claw 53, and two lifting slides 51. Both ends of the horizontal rail 52 are connected to the two lifting slides 51 respectively. The mechanical claw 53 is mounted on the horizontal rail 52. Each lifting slide 51 includes a housing, a first stepper motor, a longitudinal lead screw, and connecting parts. The housing has a rectangular structure, and the two housings are respectively located on the left and right sides of the fixing mechanism. One housing is located behind the plug storage box 41, and the other housing is located behind the receiving box. The first stepper motor is located at the bottom of the housing and is bolted to the side wall of the housing. The longitudinal lead screw... One end is connected to a stepper motor, and the other end is connected to the top of the housing via a bearing. The longitudinal lead screw can rotate within the housing. A first slide rail 511 is provided on the side of the housing. One end of the connector is fitted onto the longitudinal lead screw and threadedly connected to it. The other end of the connector extends from the first slide rail 511 and is welded to the side of the horizontal rail 52. Both stepper motors are connected to an external control host. The control host controls the two stepper motors to move synchronously, driving the horizontal rail 52 to move up and down, thereby controlling the height of the mechanical claw 53. The horizontal rail 52 is used to drive the mechanical claw 53 to move left and right.

[0027] A transverse lead screw is provided in the transverse rail 52. A second stepper motor 54 is provided at one end of the transverse rail 52. One end of the transverse lead screw is connected to the second stepper motor 54, and the other end is connected to the other end of the transverse rail 52 through a bearing. The transverse lead screw rotates in the transverse rail 52. A second slide rail 521 is provided at the top of the transverse rail 52. One end of the mechanical claw 53 extends into the transverse rail 52 and is threadedly connected to the transverse lead screw inside the transverse rail 52. The other end of the mechanical claw 53 extends from the outside of the transverse rail 52 to below the transverse rail 52.

[0028] The mechanical claw 53 adopts an existing clamping structure. The end of the mechanical claw 53 includes a gripping part 531, which is a split opening and closing structure. After the gripping part 531 is closed, it abuts against the outer surface of the steel pipe. The inner surface of the gripping part 531 is provided with a tetrafluoroethylene layer, which can prevent the mechanical claw 53 from scratching the outer wall of the steel pipe.

[0029] Example 3: This embodiment further defines the fixing mechanism based on the above embodiments, such as... Figure 1 As shown, the fixing mechanism includes two opposing fixing components 6. Each fixing component 6 includes a stand block 61, a pressing block 62, a fixing plate 63, a thrust cylinder 65, and four guide rods 64. The stand block 61 is connected to the base plate 1. The fixing plate 63 is positioned above the stand block 61 via the four guide rods 64. The pressing block 62 is positioned between the stand block 61 and the fixing plate 63. The guide rods 64 pass through the pressing block 62. The thrust cylinder 65 is positioned above the fixing plate 63. The push rod end of cylinder 65 passes through the fixing plate 63 and connects to the pressing block 62; a first abutment groove is provided on the upright block 61, and a second abutment groove is provided on the pressing block 62. The first and second abutment grooves cooperate to fix the steel pipe; the steel pipe is placed in the first abutment groove of the upright block 61, and the thrust cylinder 65 drives the pressing block 62 to move down along the guide rod 64, so that the pressing block 62 abuts against the upright block 61, clamping and fixing the steel pipe, which facilitates subsequent cleaning operations on the inner and outer walls of the steel pipe. The other parts of this embodiment are the same as those in the above embodiment, and will not be described again here.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this invention is usually placed in during use. They are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this invention does not imply that the components are required to be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A steel pipe internal and external cleaning device, characterized in that, The device includes a fixing mechanism, an internal cleaning mechanism, an external cleaning mechanism, and a base plate. The internal cleaning mechanism, external cleaning mechanism, and fixing mechanism are all mounted on the base plate. The fixing mechanism is used to clamp and fix the steel pipe. The internal cleaning mechanism is located at one end of the fixing mechanism and between the external cleaning mechanism and the fixing mechanism. The internal cleaning mechanism faces the end of the steel pipe and is used to clean the inner surface of the steel pipe. The external cleaning mechanism is spaced apart from the internal cleaning mechanism and is used to clean the outer surface of the steel pipe.

2. The steel pipe internal and external cleaning device as described in claim 1, characterized in that, The internal cleaning mechanism includes a pneumatic component, a plug storage and conveying component, and a plug positioning component. The plug positioning component is located on one side of the fixing mechanism and connects to the end of the steel pipe. The pneumatic component is located behind the plug positioning component and connects to it. The plug storage and conveying component is located behind the pneumatic component and extends from above it to the position of the plug positioning component. The plug storage and conveying component is used to store and convey plugs to the position of the plug positioning component. The plug positioning component is used to position the plugs. The pneumatic component is used to push the plugs into the steel pipe and blow them out of the steel pipe using a high-pressure airflow.

3. The steel pipe internal and external cleaning device as described in claim 2, characterized in that, The block positioning assembly includes a support block, a positioning plate, a motor box, four guide rods, and two support rods. The support block is connected to a base plate, and the positioning plate is mounted on the support block. The positioning plate has a U-shaped structure, and its side is aligned with the end of the steel pipe. The two support rods are respectively positioned on the left and right sides of the support block. The motor box is located above the positioning plate and is fixed by the two support rods. The four guide rods pass through the four corners of the motor box and abut against the four corners of the positioning plate. The motor box contains a reduction motor and a gear set. The guide rods have protruding teeth on their sides, which cooperate with the gear set. The reduction motor drives the four guide rods to move up and down. Limiting plates are provided between the two guide rods near the end of the steel pipe and the two guide rods away from the end of the steel pipe. The limiting plates are spaced apart from the motor box and are used to limit the movement of the block.

4. The steel pipe internal and external cleaning device as described in claim 3, characterized in that, The block storage and conveying assembly includes a conveyor belt and a block storage box; one end of the conveyor belt is located in the block storage box, and the other end is connected to the two guide rods of the motor box; the block storage box is used to store and push the blocks, and the conveyor belt is used to convey the blocks to the guide rods and drop the blocks onto the positioning plate, where the blocks are limited by two limiting plates.

5. The steel pipe internal and external cleaning device as described in claim 4, characterized in that, The pneumatic assembly includes a support platform, an electric push rod, a mounting block, an impact cylinder, and a guide tube. The electric push rod and the mounting block are both mounted on the support platform. The end of the electric push rod is connected to the mounting block, and the mounting block is slidably connected to the support platform. The impact cylinder is mounted on the mounting block, and the guide tube is located at the air outlet of the impact cylinder. The electric push rod drives the mounting block to move towards the steel pipe, the four guide rods move upward, the guide tube pushes the plug into the end of the steel pipe, and the impact cylinder releases high-pressure airflow to push the plug to slide rapidly on the inner wall of the steel pipe and slide out from the opposite side of the steel pipe.

6. The steel pipe internal and external cleaning device as described in claim 5, characterized in that, The mounting block has a sliding groove at its bottom, and the support platform has a protrusion that cooperates with the sliding groove to limit the position of the mounting block.

7. The steel pipe internal and external cleaning device as described in claim 1, characterized in that, The external cleaning mechanism includes a horizontal rail, a mechanical claw, and two lifting slides. Both ends of the horizontal rail are connected to the two lifting slides, and the mechanical claw is mounted on the horizontal rail. Each lifting slide includes a housing, a first stepper motor, a longitudinal lead screw, and a connecting member. The first stepper motor is located at the bottom of the housing and connected to the side wall of the housing. One end of the longitudinal lead screw is connected to the first stepper motor, and the other end is connected to the top of the housing via a bearing. A first slide rail is provided on the side of the housing. One end of the connecting member is threaded onto the longitudinal lead screw, and the other end extends from the first slide rail and connects to the horizontal rail. The two stepper motors move synchronously, driving the horizontal rail to move up and down. The horizontal rail is used to drive the mechanical claw to move left and right.

8. The steel pipe internal and external cleaning device as described in claim 7, characterized in that, A transverse lead screw is provided in the transverse rail. A second stepper motor is provided at one end of the transverse rail. One end of the transverse lead screw is connected to the second stepper motor, and the other end is connected to the other end of the transverse rail through a bearing. A second slide rail is provided at the top of the transverse rail. One end of the mechanical claw is threadedly connected to the transverse lead screw inside the transverse rail, and the other end of the mechanical claw is located below the transverse rail.

9. The steel pipe internal and external cleaning device as described in claim 8, characterized in that, The end of the mechanical claw includes a gripping part, which is a split-type opening and closing structure. When the gripping part is closed, it abuts against the outer surface of the steel pipe.

10. The steel pipe internal and external cleaning device as described in claim 1, characterized in that, The fixing mechanism includes two opposing fixing components. Each fixing component includes a vertical block, a pressing block, a fixing plate, a thrust cylinder, and four guide rods. The vertical block is connected to the base plate. The fixing plate is positioned above the vertical block via the four guide rods. The pressing block is positioned between the vertical block and the fixing plate, with the guide rods passing through the pressing block. The thrust cylinder is positioned above the fixing plate, with its push rod end passing through the fixing plate and connecting to the pressing block. The vertical block has a first abutting groove, and the pressing block has a second abutting groove. The first and second abutting grooves cooperate to fix the steel pipe.

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