Rust removing and grinding equipment for steel machining

Abstract

The utility model relates to rust removing and grinding equipment for steel machining, which comprises a machining table, a grinding table, a grinding table and a grinding table, the grinding mechanism is arranged above the cavity and used for removing rust on the surface of the steel pipe in the cavity; the rotating part is arranged at one end of the chamber and is used for driving the steel pipe in the chamber to rotate; the conveyor is arranged on one side of the machining table and used for conveying the steel pipes; and the pushing unit is arranged on the other side of the conveyor and used for pushing the steel pipes on the conveyor to the interior of the cavity, through cooperative work of the conveyor, the pushing unit, the rotating part, the grinding mechanism and other assemblies, automatic feeding and rotating grinding of the steel pipes are achieved, and the working efficiency and the automation degree are greatly improved. And meanwhile, the steel pipe is rotationally polished in the cavity, and it is ensured that all parts of the surface of the steel pipe can achieve the uniform rust removal and polishing effect.

Description

Technical Field

[0001] This application relates to the field of steel processing technology, and in particular to a rust removal and grinding device for steel processing. Background Technology

[0002] Steel pipes are frequently used in industry. Due to improper storage, lack of maintenance, or prolonged exposure to the open environment, steel pipes may rust. Before use, steel pipes with rust on the surface need to be polished with a grinding device.

[0003] In the rust removal and grinding process of steel pipes, problems such as low automation and cumbersome operation are often encountered. Most rust removal and grinding equipment used on site relies on manual labor for loading, fixing, and turning the steel pipes for grinding, which is not only inefficient but also increases the labor intensity and safety risks for workers.

[0004] Specifically, the rust removal and grinding equipment used on-site often lacks an automatic feeding mechanism, requiring workers to manually place the steel pipes into the equipment. This process is time-consuming and labor-intensive, affecting the continuity of production. In addition, when grinding the entire surface of the steel pipes, the uncut pipes are usually long and heavy, making manual flipping difficult and making it hard to achieve a uniform grinding effect. This often results in uneven grinding and omissions on the surface of the steel pipes.

[0005] To address the aforementioned issues, a rust removal and grinding device for steel processing is now designed. Utility Model Content

[0006] This application provides a rust removal and grinding device for steel processing to solve the problem that in related technologies, rust removal and grinding devices for steel pipe surfaces are inconvenient for automatic feeding and turning of steel pipes for grinding, and mostly rely on manual feeding, fixing and turning of steel pipes for grinding.

[0007] In a first aspect, a rust removal and grinding device for steel processing is provided, comprising:

[0008] A processing table, which has a cavity for accommodating steel pipes;

[0009] A grinding mechanism is installed above the chamber, which is used to remove rust from the surface of the steel pipe inside the chamber;

[0010] A rotating part is arranged at one end of the chamber, which is used to drive the steel pipe inside the chamber to rotate;

[0011] A conveyor located on one side of the processing table is used to transport steel pipes;

[0012] A pushing unit located on the other side of the conveyor is used to push the steel pipe on the conveyor into the cavity.

[0013] In some embodiments, a feeding tray is embedded in the processing table. The feeding tray is semi-circular and has openings at both ends. The feeding tray and the processing table enclose a cavity.

[0014] The top of the chamber, the surface of the processing table, and the surface of the conveyor rollers are at the same horizontal level.

[0015] In some embodiments, the grinding mechanism includes a plurality of electric push rods mounted on a processing table, a top plate being disposed between the piston rods of the plurality of electric push rods, a linear slide rail being disposed at the bottom of the top plate above the chamber, and a grinding machine being disposed at the bottom of the linear slide rail.

[0016] In some embodiments, the rotating part includes:

[0017] A speed reducer located at one end of the chamber;

[0018] The drive motor is mounted on the reducer;

[0019] A rotating disk connected to the output shaft of the reducer;

[0020] An electromagnetic chuck is located at the other end of the rotating disk;

[0021] The output shaft of the drive motor is connected to the input shaft of the reducer.

[0022] In some embodiments, the pushing unit includes a bracket disposed opposite to the processing table, an electric push rod II disposed on the bracket, a pushing plate disposed on the piston rod of the electric push rod, the bottom of the pushing plate being horizontally aligned with the roller surface of the conveyor, and the pushing plate being arranged along the length of the conveyor;

[0023] The electric push rod drives the push plate to move along the width of the conveyor, in order to push the steel pipe on the conveyor into the cavity.

[0024] In some embodiments, a dust extraction section is provided at the bottom of the chamber;

[0025] The dust collection unit includes a collection chamber located below the chamber. Both the collection chamber and the chamber have interconnected waste holes. A fan is installed at one end of the collection chamber, and a metal filter is embedded between the fan and the collection chamber.

[0026] In some embodiments, a plurality of rollers are arranged relatively rotatably inside the chamber, the plurality of rollers being distributed along the length of the chamber and used to assist the rotation of the steel pipe.

[0027] This application provides a rust removal and grinding device for steel processing. Through the coordinated operation of components such as a conveyor, pushing unit, rotating part, and grinding mechanism, automatic feeding and rotary grinding of steel pipes are achieved, greatly improving work efficiency and automation. Simultaneously, the steel pipe undergoes rotary grinding within the chamber, ensuring that all parts of its surface receive a uniform rust removal and grinding effect.

[0028] Furthermore, the equipment has a compact structure and is easy to operate, making it suitable for on-site use. During operation, workers only need to perform simple operations to remove rust and grind steel pipes, reducing labor intensity and safety risks. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A three-dimensional structural illustration provided for an embodiment of this application. Figure 1 ;

[0031] Figure 2 A three-dimensional structural illustration provided for an embodiment of this application. Figure 2 ;

[0032] Figure 3 A three-dimensional structural illustration provided for an embodiment of this application. Figure 3 ;

[0033] Figure 4 This is a left sectional view of the suction unit provided in an embodiment of this application;

[0034] Figure 5 This is a front view of the grinding mechanism provided in an embodiment of this application.

[0035] In the diagram: 1. Processing table; 2. Chamber; 3. Grinding mechanism; 4. Rotating part; 5. Conveyor; 6. Pushing unit; 7. Dust collection part; 8. Roller; 11. Discharge tray; 31. Electric push rod; 32. Top plate; 33. Linear slide rail; 34. Grinding machine; 41. Reducer; 42. Drive motor; 43. Rotary disk; 44. Electromagnetic chuck; 61. Support; 62. Electric push rod II; 63. Pushing plate; 71. Recycling bin; 72. Fan; 73. Metal filter. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] This application provides a rust removal and grinding equipment for steel processing, which can solve the problem that the rust removal and grinding equipment for steel pipe surfaces in the related technology is inconvenient to automatically feed and turn over the steel pipes for grinding, and mostly relies on manual feeding, fixing and turning over the steel pipes for grinding.

[0038] Please see Figures 1-3 A rust removal and grinding device for steel processing includes: a processing table 1, on which a chamber 2 for accommodating steel pipes is provided; a grinding mechanism 3 disposed above the chamber 2 for removing rust from the surface of the steel pipes inside the chamber 2; a rotating part 4 disposed at one end of the chamber 2 for driving the steel pipes inside the chamber 2 to rotate; a conveyor 5 disposed on one side of the processing table 1 for conveying steel pipes; and a pushing unit 6 disposed on the other side of the conveyor 5 for pushing the steel pipes on the conveyor 5 into the chamber 2.

[0039] First, the steel pipes to be derusted and ground are conveyed by conveyor 5. Conveyor 5 typically operates continuously or intermittently to ensure that the steel pipes can smoothly and orderly enter the next processing stage.

[0040] When the steel pipe is conveyed to the designated position, the pushing unit 6, located on the other side of the conveyor 5, begins to operate. The pushing unit 6 pushes the steel pipe from the conveyor 5 into the interior of the chamber 2. This process ensures that the steel pipe enters the chamber accurately. Once the steel pipe enters the chamber 2, the rotating part 4, located at one end of the chamber, begins to operate, causing the steel pipe to rotate within the chamber. This step ensures that all parts of the steel pipe surface receive uniform rust removal and polishing.

[0041] As the steel pipe rotates, the grinding mechanism 3, located above chamber 2, begins to operate. The grinding mechanism 3 uses its high-speed rotating grinding wheel to remove rust and polish the surface of the steel pipe. This process not only removes the rust layer from the surface of the steel pipe but also makes its surface smoother and flatter.

[0042] Through the coordinated operation of components such as conveyor 5, pushing unit 6, rotating part 4, and grinding mechanism 3, automatic feeding and rotary grinding of steel pipes are achieved, greatly improving work efficiency and automation. Simultaneously, the rotary grinding of the steel pipes within the chamber ensures that all parts of its surface receive uniform rust removal and grinding, thus improving product quality.

[0043] Furthermore, the equipment has a compact structure and is easy to operate, making it suitable for on-site use. During operation, workers only need to perform simple operations to remove rust and grind steel pipes, reducing labor intensity and safety risks.

[0044] In this embodiment, conveyor 5 is a roller conveyor.

[0045] Conveyor 5 is a roller conveyor, which mainly consists of a series of parallel rollers. These rollers are driven to rotate by a motor, thereby moving objects such as steel pipes placed on the rollers forward.

[0046] The drive mechanism of a roller conveyor typically includes components such as a motor, a reducer, and a drive chain or belt. After the motor starts, the reducer transmits power to the drive chain, which in turn drives the rollers to rotate. When a steel pipe is placed on the roller conveyor, the rotation of the rollers causes the pipe to be subjected to forward friction, thus transporting it to the designated position. The conveying speed of the roller conveyor can be adjusted by changing the motor speed or the reduction ratio of the reducer.

[0047] In one embodiment, a feeding tray 11 is embedded in the processing table 1. The feeding tray 11 is semi-circular and has open ends. The feeding tray 11 and the processing table 1 enclose a cavity 2. The top of the cavity 2, the surface of the processing table 1, and the surface of the rollers of the conveyor 5 are at the same horizontal height.

[0048] The feeding tray 11 is semi-circular with openings at both ends and the top, allowing it to easily accommodate steel pipes. The openings also facilitate the discharge of the steel pipes. The feeding tray 11 and the processing table 1 together form an open chamber 2, providing a stable space for subsequent rust removal and grinding operations.

[0049] To ensure the stability of the steel pipes during transportation, placement and grinding, the top of chamber 2, the surface of processing table 1 and the roller surface of conveyor 5 are designed to be at the same level, which avoids the steel pipes from bumping and colliding during transportation and placement, and also improves the operating efficiency and safety of the entire equipment.

[0050] like Figure 1 and Figure 5 As shown, in one embodiment, the grinding mechanism 3 includes a plurality of electric push rods 31 disposed on the processing table 1, a top plate 32 disposed between the piston rods of the plurality of electric push rods 31, a linear slide rail 33 disposed at the bottom of the top plate 32 above the chamber 2, and a grinding machine 34 disposed at the bottom of the linear slide rail 33.

[0051] Multiple electric push rods 31 are mounted on the processing table 1. When the electric push rods 31 are started, they will extend and retract synchronously, thereby pushing or pulling the top plate 32 to move up and down, allowing the grinding mechanism 3 to make precise vertical adjustments according to the height of the steel pipe and the position to be ground.

[0052] The linear guide rail 33 ensures that the grinder 34 can move horizontally along a predetermined straight path, allowing the grinder 34 to cover the entire surface of the steel pipe for comprehensive grinding. The grinder 34 is mounted at the bottom of the linear guide rail 33 and moves with it. The grinder 34 is typically equipped with a grinding wheel for physically abrading the surface of the steel pipe to remove rust, dirt, or uneven areas.

[0053] At the start of the grinding operation, the electric push rod 31 first adjusts the grinding mechanism 3 to the appropriate height. Then, the linear slide rail 33 starts, driving the grinder 34 to move along the length of the steel pipe. At the same time, the steel pipe rotates within the chamber 2, ensuring that the grinder 34 can evenly cover the entire surface of the steel pipe. This three-dimensional movement—vertical, horizontal, and rotational—ensures the comprehensiveness and uniformity of the grinding operation.

[0054] like Figure 2 and Figure 3 As shown, specifically, the rotating part 4 in this embodiment includes: a reducer 41 disposed at one end of the chamber 2; a drive motor 42 disposed on the reducer 41; a rotating disk 43 connected to the output shaft of the reducer 41; an electromagnetic chuck 44 disposed at the other end of the rotating disk 43; and the output shaft of the drive motor 42 is connected to the input shaft of the reducer 41.

[0055] The rotating part 4, as one of the key components of the equipment, is responsible for driving the steel pipe to rotate in the chamber 2 to ensure that the grinding machine 34 can fully and evenly process the surface of the steel pipe.

[0056] The main function of the reducer 41 is to reduce the output speed of the drive motor 42 while increasing the output torque. The drive motor 42 is mounted on the reducer 41, and its output shaft is connected to the input shaft of the reducer 41. The drive motor 42 provides rotational power, which is transmitted to the rotating disk 43 through the reduction and torque amplification effect of the reducer 41.

[0057] The rotary disk 43 is connected to the output shaft of the reducer 41 and is the direct drive component for the rotation of the steel pipe. The rotary disk 43 is typically made of high-strength, wear-resistant materials to ensure stable performance and accuracy during long-term use.

[0058] An electromagnetic chuck 44 is located at the other end of the rotating disk 43 and is used to fix the steel pipe. When the electromagnetic chuck 44 is energized, it generates a strong suction force, firmly adhering the steel pipe to the rotating disk 43. In this way, the steel pipe can rotate stably as the rotating disk 43 rotates.

[0059] During the rust removal and grinding process, the steel pipe is first attracted to the rotating disk 43 by the electromagnetic chuck 44. Then, the drive motor 42 is started, and its output shaft rotates, driving the input shaft of the reducer 41 to rotate. After the reducer 41 reduces the speed and increases the torque, it transmits the power to the rotating disk 43, which drives the steel pipe to rotate within the chamber 2. At the same time, the grinder 34, driven by the electric push rod 31, approaches the surface of the steel pipe to remove rust and grind the rotating steel pipe.

[0060] like Figure 2 and Figure 3 As shown, specifically, the pushing unit 6 in this embodiment includes a bracket 61 arranged opposite to the processing table 1. An electric push rod 62 is provided on the bracket 61. A pushing plate 63 is provided on the piston rod of the electric push rod 62. The bottom of the pushing plate 63 is horizontally aligned with the roller surface of the conveyor 5. The pushing plate 63 is arranged along the length of the conveyor 5.

[0061] The electric push rod 62 drives the push plate 63 to move along the width of the conveyor 5, in order to push the steel pipe on the conveyor 5 into the chamber 2.

[0062] Two guide rods are arranged opposite each other on the push plate 63. Multiple guide rollers are arranged at the upper and lower ends of the guide rods. The guide rollers are rotatably mounted on the bracket 61.

[0063] The pushing unit 6 is responsible for accurately pushing the steel pipe from the conveyor 5 into the chamber 2 for subsequent rust removal and grinding operations.

[0064] The bracket 61 provides a stable support structure. An electric push rod 62 is mounted on the bracket 61, its piston rod connected to the push plate 63. The electric push rod 62 drives the push plate 63 to move along the width of the conveyor 5, thereby pushing the steel pipe from the conveyor 5 into the chamber 2. The bottom of the push plate 63 is at the same horizontal level as the roller surface of the conveyor 5, ensuring the steel pipe remains stable during pushing and avoiding bumps or collisions caused by height differences. The push plate 63 is arranged along the length of the conveyor 5 to facilitate the smooth pushing of the steel pipe.

[0065] Two guide rods are arranged opposite each other on the push plate 63, and the guide rollers are mounted on the bracket 61 to provide smooth guidance and support for the movement of the push plate 63, thereby enhancing the stability of the push plate 63.

[0066] During the rust removal and grinding process, when the steel pipe is conveyed to the designated position, the electric push rod 62 is activated and drives the push plate 63 to move along the width direction of the conveyor 5. The guide rod and guide roller on the push plate 63 slide smoothly on the bracket 61, ensuring the stability and accuracy of the steel pipe during the pushing process. When the push plate 63 contacts the steel pipe, it continues to push the steel pipe along the length direction of the conveyor 5 until the steel pipe is completely pushed into the chamber 2. At this time, the grinding mechanism 3 starts to work, removing rust and grinding the surface of the steel pipe.

[0067] like Figure 3 and 4 As shown, in another embodiment, a dust suction unit 7 is provided at the bottom of the chamber 2;

[0068] The dust collection unit 7 includes a collection chamber 71 located below the chamber 2. Both the collection chamber 71 and the chamber 2 have interconnected waste disposal holes. A fan 72 is installed at one end of the collection chamber 71, and a metal filter 73 is embedded between the fan 72 and the collection chamber 71. An opening is provided at the other end of the collection chamber 71, and a sealing cap is hinged to the opening.

[0069] The dust collection unit 7 is designed to effectively collect and handle waste and dust generated during the rust removal and polishing process, thereby maintaining a clean working environment and protecting the health of operators.

[0070] The recycling bin 71 is used to collect and store waste and dust falling from the chamber 2. The recycling bin 71 is connected to the chamber 2 through interconnected waste holes to ensure that waste and dust can fall smoothly into the recycling bin 71.

[0071] A blower 72 is located at one end of the recycling bin 71 to generate suction, drawing waste and dust from chamber 2 into the recycling bin 71 through the waste inlet. The suction power of the blower can be adjusted according to actual needs to ensure effective collection of waste and dust. A metal filter 73 is embedded between the blower 72 and the recycling bin 71 to filter out metal particles from the waste and dust. This helps prevent metal particles from damaging the blower and ensures that the waste collected in the recycling bin is cleaner.

[0072] The other end of the recycling bin 71 has an opening with a hinged sealing cap. The sealing cap ensures the airtightness of the recycling bin, and when the recycling bin needs to be cleaned, the sealing cap can be opened to empty the waste and dust.

[0073] During the rust removal and polishing process, the blower 72 starts and generates suction, drawing waste and dust from chamber 2 into the recovery bin 71 through the waste hole. The waste and dust are then filtered through the metal filter 73 in the recovery bin 71, with metal particles being filtered out and falling into the recovery bin along with the remaining waste and dust. When the waste in the recovery bin accumulates to a certain level, the sealing cover can be opened for cleaning.

[0074] The effective collection and treatment by the dust extraction unit 7 can significantly reduce the impact of waste and dust generated during rust removal and polishing on the working environment, keeping the working environment clean. At the same time, it helps to reduce the risk of operators inhaling waste and dust during rust removal and polishing, thereby protecting their health.

[0075] In this embodiment, a plurality of rollers 8 are arranged inside the chamber 2 for relative rotation. The plurality of rollers 8 are distributed along the length of the chamber 2 and are used to assist the rotation of the steel pipe.

[0076] By setting multiple rollers 8 inside the chamber 2 to assist the rotation of the steel pipe within the chamber 2, the stability and smoothness of the steel pipe rotation are improved, thereby ensuring the quality and efficiency of the rust removal and grinding operation.

[0077] Multiple rollers 8 are arranged relatively rotatably inside the chamber 2 and distributed along the length of the chamber 2 to ensure that the steel pipe can be adequately supported and guided during rotation.

[0078] Rollers 8 are typically made of wear-resistant and corrosion-resistant materials, such as steel or alloys, to ensure that they maintain good performance and precision during long-term use.

[0079] In actual operation, by opening an installation slot in the chamber 2, the roller 8 is installed in the installation slot inside the chamber 2 through bearings and a rotating shaft, which makes the steel pipe rotate more smoothly and stably. At the same time, the rotation of the roller 8 can also reduce the frictional resistance between the steel pipe and the chamber 2, reducing energy consumption and wear.

[0080] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0081] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0082] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A rust removal and grinding device for steel processing, characterized in that, include: A processing table (1) is provided with a chamber (2) for accommodating steel pipes. A grinding mechanism (3) is installed above the chamber (2) for removing rust from the surface of the steel pipe inside the chamber (2); A rotating part (4) is arranged at one end of the chamber (2), which is used to drive the steel pipe inside the chamber (2) to rotate; A conveyor (5) is set on one side of the processing table (1) for conveying steel pipes; A pushing unit (6) is provided on the other side of the conveyor (5) for pushing the steel pipe on the conveyor (5) into the chamber (2).

2. The rust removal and grinding equipment for steel processing as described in claim 1, characterized in that: A feeding tray (11) is embedded in the processing table (1). The feeding tray (11) is semi-circular and has open ends. The feeding tray (11) and the processing table (1) enclose a cavity (2). The top of the chamber (2), the surface of the processing table (1), and the surface of the rollers of the conveyor (5) are at the same horizontal level.

3. The rust removal and grinding equipment for steel processing as described in claim 1, characterized in that: The grinding mechanism (3) includes multiple electric push rods (31) arranged on the processing table (1), a top plate (32) is arranged between the piston rods of the multiple electric push rods (31), a linear slide rail (33) located above the chamber (2) is arranged at the bottom of the top plate (32), and a grinding machine (34) is arranged at the bottom of the linear slide rail (33).

4. The rust removal and grinding equipment for steel processing as described in claim 1, characterized in that: The rotating part (4) includes: A reducer (41) is installed at one end of the chamber (2); The drive motor (42) is mounted on the reducer (41); A rotating disk (43) connected to the output shaft of the reducer (41); An electromagnetic chuck (44) is located at the other end of the rotating disk (43). The output shaft of the drive motor (42) is connected to the input shaft of the reducer (41).

5. The rust removal and grinding equipment for steel processing as described in claim 1, characterized in that: The pushing unit (6) includes a bracket (61) arranged opposite to the processing table (1), an electric push rod (62) is provided on the bracket (61), a pushing plate (63) is provided on the piston rod of the electric push rod (62), the bottom of the pushing plate (63) is horizontally located at the same time as the roller surface of the conveyor (5), and the pushing plate (63) is arranged along the length of the conveyor (5). The electric push rod 2 (62) drives the push plate (63) to move along the width of the conveyor (5) to push the steel pipe on the conveyor (5) into the chamber (2).

6. The rust removal and grinding equipment for steel processing as described in claim 1, characterized in that: The bottom of the chamber (2) is provided with a dust suction unit (7); The dust collection unit (7) includes a recycling bin (71) located below the chamber (2). Both the recycling bin (71) and the chamber (2) have interconnected waste holes. A fan (72) is provided at one end of the recycling bin (71). A metal filter (73) is embedded between the fan (72) and the recycling bin (71).

7. The rust removal and grinding equipment for steel processing as described in claim 1, characterized in that: The chamber (2) is provided with multiple rollers (8) that rotate relative to each other. The multiple rollers (8) are distributed along the length of the chamber (2) and are used to assist the rotation of the steel pipe.

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