Internal weld grinding system and internal welding machine

Abstract

The present disclosure provides an internal weld grinding system and an internal welding machine, which relate to the field of pipeline welding technology. The internal weld grinding system includes: a center tube, a rotating sleeve, a driving device, and a grinding assembly; the center tube is axially connected to the internal welding machine; the rotating sleeve is arranged outside the center tube, and the driving device drives the rotating sleeve to rotate around the center tube; the grinding assembly is arranged on the rotating sleeve and rotates with the rotating sleeve; the grinding assembly includes a laser, a telescopic device, and a detection device, one end of the telescopic device is connected to the rotating sleeve, and the end faces the outside of the rotating sleeve, the laser and the detection device are arranged at the end of the telescopic device, and the laser and the detection device move along the radial direction of the rotating sleeve with the telescopic device. The internal weld grinding system disclosed in the present disclosure has a simple structure, a small size, and is coaxially arranged with the welding machine body. The grinding process does not require the internal welding machine to be withdrawn, thereby improving the working efficiency of the internal weld grinding.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pipeline welding, and in particular to an internal weld grinding system and an internal welding machine. Background Art

[0002] During welding of petroleum, petrochemical, and municipal pipelines, to prevent pipe groove deformation or burn-through during automatic welding, the internal welder must first complete the pipe root weld, also known as the root weld. After the root weld is completed, the weld seam must be ground.

[0003] In the related art, internal weld seams of pipelines are repaired using internal weld seam grinding devices equipped with electric tools. However, due to the complex structure and large size of the tools, the internal welder must be completely withdrawn before the grinding tools can enter the pipeline, resulting in very low grinding efficiency. Summary of the Invention

[0004] The present disclosure provides an internal weld grinding system and an internal welding machine, which can solve the problem of low working efficiency caused by the internal weld grinding device in the related art requiring the internal welding machine to completely exit before entering the pipeline.

[0005] The technical solution is as follows:

[0006] In one aspect, an internal weld grinding system is provided, the internal weld grinding system comprising: a center tube, a rotating sleeve, a driving device, and a grinding assembly;

[0007] The central tube is axially connected to the internal welding machine;

[0008] The rotating sleeve is rotatably mounted outside the central tube, and the driving device drives the rotating sleeve to rotate around the central tube;

[0009] The grinding assembly is arranged on the rotating sleeve and rotates with the rotating sleeve; the grinding assembly includes a laser, a telescopic device, and a detection device. One end of the telescopic device is connected to the rotating sleeve, and the end faces the outside of the rotating sleeve. The laser and the detection device are arranged at the end of the telescopic device. The laser and the detection device move along the radial direction of the rotating sleeve with the telescopic device.

[0010] In some embodiments, the detection device includes a camera, which is arranged on a peripheral side of the laser.

[0011] In some embodiments, the grinding assembly further includes a protective cover, which is provided on the laser and the camera; the protective cover includes a lens and a protective edge, and the protective edge is provided with circumferentially distributed protective air holes.

[0012] In some embodiments, the telescopic device is any one of a linear motor, a telescopic cylinder, a rack and pinion mechanism, and a worm gear mechanism.

[0013] In some embodiments, the driving device includes a rotating motor, a gear, and an inner ring gear. The rotating motor is installed on the inner wall of the central tube. The rotating motor is connected to the gear. The inner ring gear is arranged on the inner wall of the rotating sleeve. An opening is provided on the central tube. The gear and the inner ring gear are engaged through the opening.

[0014] In some embodiments, the rotating motor is mounted on the inner wall of the central tube via a motor mounting bracket, the motor mounting bracket is fixed to the inner wall of the central tube via a first screw, the rotating motor includes an output shaft, and the gear is mounted on the output shaft via a flat key.

[0015] In some embodiments, a bearing is further provided between the rotating sleeve and the central tube.

[0016] In some embodiments, the internal weld grinding system further includes a power supply module, and the power supply module is electrically connected to the driving device, the laser, the telescopic device, and the detection device respectively.

[0017] In some embodiments, the internal weld grinding system further includes a rotating motor and a motor driver, and the motor driver is electrically connected to the rotating motor and the telescopic device respectively.

[0018] In some embodiments, the internal weld grinding system further includes a controller and a touch screen display, and the laser, the detection device, the motor driver, and the touch screen display are electrically connected to the controller respectively.

[0019] On the other hand, an internal welding machine is provided, comprising the above-mentioned internal weld grinding system; the internal welding machine also comprises a welding machine body, the center tube of the internal weld grinding system is axially connected to the welding machine body via a fixed tube, and the internal weld grinding system is configured to perform laser grinding on the internal weld processed by the welding machine body.

[0020] The beneficial effects of the technical solution provided by the present disclosure include at least:

[0021] The internal weld grinding system disclosed in the present invention has a simple structure and a small grinding component. The internal weld grinding system can be coaxially arranged with the welding machine body of the internal welder and enter the pipeline together with the internal welder. After the internal welder completes the processing of the internal weld, there is no need to withdraw the internal welder. The laser grinding system can immediately grind the internal weld, thereby improving the work efficiency of the pipeline internal weld grinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 Schematic diagram of the structure of the internal weld grinding system provided by an embodiment of the present disclosure;

[0024] Figure 2 is a schematic structural diagram of a grinding assembly provided by an embodiment of the present disclosure;

[0025] Figure 3 is a schematic structural diagram of a driving device provided by an embodiment of the present disclosure;

[0026] Figure 4 Schematic diagram of the connection relationship of the internal weld grinding system provided by the embodiment of the present disclosure;

[0027] Figure 5 It is a structural schematic diagram of the internal welding machine provided in an embodiment of the present disclosure.

[0028] The reference numerals in the figures represent respectively:

[0029] 1. Center tube; 2. Rotating sleeve; 3. Driving device; 301. Rotating motor; 4. Grinding assembly; 401. Laser; 402. Telescopic device; 403. Detection device; 4031. Camera; 404. Protective cover; 4041. Lens; 4042. Protective edge; 405. Protective pore; 5. Bearing; 6. Output shaft; 7. Flat key; 8. Motor mounting bracket; 9. Power supply module; 10. Motor driver; 11. Controller; 12. Touch screen; 13. Inner weld; 14. Welding machine body; 15. Fixed tube; 16. Pipeline. DETAILED DESCRIPTION

[0030] Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings.

[0031] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0032] It should be understood that the term "at least one" in this document refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0033] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0034] In the related art, manual grinding of root welds is usually performed using handheld power tools. Manual welding seam grinding requires operators to drill into the pipeline for inspection and grinding. When the space inside the pipeline is small and the operation is inconvenient, there are certain safety hazards when manually grinding with power tools inside the pipe. For pipelines with a nominal diameter of less than 600 mm 16, personnel cannot enter.

[0035] When automatic devices are used instead of manual grinding, electric tools use wire brushes or grinding heads to grind the inner welds, which has low work efficiency. In addition, the contact grinding accuracy of electric tools is low, and the wire brushes and grinding heads are seriously worn out.

[0036] On the other hand, the grinding tools in the related art are not universally applicable to pipes with different inner diameters, and the efficiency of the tools is not high.

[0037] The embodiment of the present disclosure provides an internal weld grinding system, combined with Figure 1 As shown, the internal weld grinding system includes: a center tube 1, a rotating sleeve 2, a driving device 3, and a grinding assembly 4; the center tube 1 is axially connected to the welding machine body 14 of the internal welding machine; the rotating sleeve 2 is rotatably sleeved outside the center tube 1, and the driving device 3 drives the rotating sleeve 2 to rotate around the center tube 1; the grinding assembly 4 is arranged on the rotating sleeve 2 and rotates with the rotating sleeve 2;

[0038] Among them, the grinding assembly 4 includes a laser 401, a telescopic device 402, and a detection device 403. One end of the telescopic device 402 is connected to the outer wall of the rotating sleeve 2, and the end of the telescopic device 402 is facing the outside of the rotating sleeve 2. The laser 401 and the detection device 403 are arranged at the end of the telescopic device 402. The laser 401 and the detection device 403 move along the radial direction of the rotating sleeve 2 with the telescopic device 402.

[0039] The internal weld grinding system of this embodiment has a simple grinding assembly 4 and a small tool volume. The grinding system can be coaxially arranged with the welding machine body of the internal welder and enter the pipeline together with the internal welder. After the internal welder completes the processing of the internal weld, there is no need to withdraw the internal welder. The internal weld grinding system can immediately grind the internal weld, thereby improving the working efficiency of the grinding processing of the internal weld of the pipeline.

[0040] The internal weld grinding system of this embodiment uses a laser 401 as a grinding tool, which can perform contactless grinding of the internal weld. There is no obvious processing stress on the pipe wall, the heat-affected zone is small, the processing speed is fast, the workpiece does not deform, and there is no tool wear of the grinding tool. The laser beam is easier to control, thereby achieving higher-precision grinding processing.

[0041] In addition, the internal weld grinding system of this embodiment uses the central tube 1 as the support shaft of the internal weld grinding system. The central tube 1 can keep the internal weld grinding system in a coaxial position with the welding machine body of the internal welding machine.

[0042] Thus, when an internal welder equipped with the disclosed internal weld grinding system is used for pipeline welding operations, the internal welder must first ensure that it is accurately positioned on the central axis of the pipeline before entering the pipeline and performing welding operations. When the internal welder itself is positioned within the pipeline, the internal weld grinding system is held coaxially with the internal welder by the central pipe 1, and the internal welder simultaneously completes the positioning of the internal weld grinding system within the pipeline. When grinding the internal weld, the internal weld grinding system is located on the central axis of the pipeline, eliminating the need for repositioning and enabling the grinding process to proceed directly, further improving the efficiency of weld grinding.

[0043] In the internal weld grinding system of this embodiment, the grinding assembly 4 is installed on the rotating sleeve 2, and the rotating sleeve 2 can be driven by the driving device 3 to rotate around the central tube 1. Therefore, the grinding assembly 4 can achieve 360-degree circumferential grinding of the internal weld 13 without dead angles.

[0044] The grinding assembly 4 of the internal weld grinding system includes a telescopic device 402 that can be extended and retracted along the radial direction of the center tube 1 and the rotating sleeve 2. Therefore, when dealing with the grinding operation of the internal welds 13 of different pipe diameters, the telescopic device 402 can be controlled to extend or shorten according to the different pipe diameters, and the laser 401 can be accurately moved to the grinding position of the internal weld 13 to ensure that the internal weld 13 is at the optimal focal length position of the laser 401. The laser 401 can perform grinding processing at maximum power to meet the working requirements under different pipe diameter working conditions.

[0045] In the internal weld grinding system of this embodiment, considering that the internal weld of the pipeline has high processing requirements and the grinding quality is of paramount importance, a detection device 403 is further provided in the grinding assembly 4. The function of the detection device 403 is to detect the grinding working surface of the internal weld grinding system in real time, regularly or irregularly.

[0046] In some feasible examples, the detection device 403 may first capture images and / or videos of the grinding work surface, and then further identify the grinding quality through a computer program or manual visual inspection, thereby achieving quality detection.

[0047] In other feasible examples, the detection device 403 collects sample data of one or more detection points, identifies the collected spatial data, physical properties, etc. of the detection points, and judges the grinding quality based on the spatial data, physical properties, etc. of the detection points, thereby realizing quality detection.

[0048] In other feasible examples, the detection device 403 implements quality detection of the grinding operation by measuring or detecting in real time the dimensional data of the inner weld 13 such as the height, width, and thickness through a target value achievement method.

[0049] Optionally, the internal weld grinding system of this embodiment can adjust the working state of the grinding assembly 4 in real time according to the feedback results of the detection device 403, such as the telescopic length of the telescopic device 402, the grinding power of the laser 401, the rotation speed of the rotating motor 301, etc.

[0050] Optionally, the internal weld grinding system of this embodiment is coaxially mounted in front of the welding body of the internal welder. Thus, when the internal welder is inserted into the pipe 16, the internal weld grinding system of this embodiment is also inserted into the pipe 16 and can complete axial positioning within the pipe 16 together with the internal welder. After the welding body completes processing of the internal weld 13, the internal welder is moved axially a certain distance without completely withdrawing the internal welder. The internal weld grinding system can then be aligned with the internal weld 13, thereby performing contactless grinding of the internal weld 13 using the laser beam.

[0051] In some embodiments, combined Figure 2 As shown, the detection device 403 includes a camera 4031, which is arranged around the laser 401. The camera 4031 can capture images of the processing area of ​​the laser 401 or monitor it in real time. Therefore, the internal weld grinding system of this embodiment can capture images and / or videos of the processing area or monitor it in real time during the process of laser grinding the internal weld 13 by the laser 401, thereby ensuring high-precision grinding quality.

[0052] In some embodiments, there are at least two cameras 4031, which are any one of a main camera, a depth of field camera, a wide-angle camera, and a telephoto camera, so as to realize the fusion of the main camera and the depth of field camera to realize the background blur function, the fusion of the main camera and the wide-angle camera to realize panoramic shooting and VR (virtual reality) shooting function or other fusion shooting functions.

[0053] In some embodiments, the detection device 403 may further include a flash. The flash may be a single-color temperature flash or a dual-color temperature flash. A dual-color temperature flash is a combination of a warm light flash and a cold light flash, and can be used for light compensation at different color temperatures.

[0054] In order to prevent the debris generated by grinding from affecting the normal movement of the grinding assembly 4, in some embodiments, Figure 2 As shown, the grinding assembly 4 also includes a protective cover 404, which is provided on the laser 401 and the camera 4031. The protective cover 404 has a transparent part, which allows the laser beam and light to pass through, thereby not affecting the normal operation of the laser 401 and the camera 4031.

[0055] Optionally, the protective cover 404 includes a lens 4041 and a protective edge 4042. Exemplarily, the lens 4041 is made of a transparent material, serving as a transmission area for the laser 401 and the camera 4031, and also providing protection for the laser 401 and the camera 4031.

[0056] Among them, optionally, the protective edge 4042 is designed to be a circumferential convex edge that is higher than the lens 4041 along the radial direction of the rotating sleeve 2, which can prevent the middle lens 4041 from being scratched by the inner wall of the pipe 16 and other parts. The protective edge 4042 is provided with circumferentially distributed protective air holes 405, which can allow protective air flow to pass through.

[0057] Thus, the shielding gas blows the lens 4041 on the inner circle of the protective edge 4042 through the shielding gas hole 405 to prevent welding slag and dust from accumulating on the lens 4041 and affecting the normal operation of the laser 401 and the camera 4031.

[0058] In some embodiments, the telescopic device 402 is any one of a linear motor, a telescopic cylinder, a gear rack mechanism, and a worm gear mechanism. It can be understood that any structure, element or product that can perform linear motion to provide the grinding component 4 with a radial approach to or distance from the position of the inner weld 13 can be protected by this embodiment.

[0059] In some embodiments, the detection device 403 may further include a proximity sensor, also known as a distance sensor, which is optionally disposed on the top of the protective cover 404. The proximity sensor is used to collect the distance between the grinding assembly 4 and the inner wall of the pipe 16.

[0060] In some embodiments, combined Figure 3 As shown, the driving device 3 includes a rotating motor 301, a gear, and an inner ring gear. The rotating motor 301 is installed on the inner wall of the central tube 1. The rotating motor 301 is connected to the gear. The inner ring gear is arranged on the inner wall of the rotating sleeve 2. An opening is provided on the central tube 1, and the gear and the inner ring gear are engaged through the opening.

[0061] The internal weld grinding system of this embodiment adopts a central tube 1 equipped with a grinding assembly 4. The grinding assembly 4 is rotatably connected to the central tube 1 through a rotating sleeve 2 and a driving device 3, thereby realizing 360-degree circumferential rotation of the grinding assembly 4 and achieving dead-angle grinding of the internal weld 13.

[0062] For example, the power component of the drive device 3, namely the rotating motor 301, is installed in the central cavity of the central tube 1, thereby reducing the radial size of the internal weld grinding system and reducing the weight of the rotating components, namely the rotating sleeve 2 and the grinding assembly 4. The load of the rotational motion is small, and a smaller power rotating motor 301 can be used for normal driving, which is beneficial to controlling product costs and saving energy.

[0063] In addition, the internal weld grinding system of this embodiment uses gears and an internal gear ring to transmit the torque of the rotating motor 301 to the grinding assembly 4. The rotational motion is reliable and efficient, the transmission ratio is relatively high, and the rotational motion control accuracy is high, which can further improve the processing accuracy of laser grinding.

[0064] In some embodiments, combined Figure 3 As shown, the rotating motor 301 is mounted on the inner wall of the central tube 1 via a motor fixing frame 8 , and the motor fixing frame 8 is fixed to the inner wall of the central tube 1 via a first screw. The rotating motor 301 includes an output shaft 6 , and a gear is mounted on the output shaft 6 via a flat key 7 .

[0065] The internal weld grinding system of this embodiment fixes the rotating motor 301 on the inner wall of the central tube 1 through the motor fixing bracket 8. It has a simple structure and is easy to install, which facilitates the connection of the motor power line and the motor control line of the rotating motor 301. The motor power line and the motor control line can be laid out with the help of the internal space of the central tube 1, thereby improving the safety and convenience of the wiring structure.

[0066] In some embodiments, a bearing member 5 is further provided between the rotating sleeve 2 and the central tube 1 , and the bearing member 5 can connect the rotating sleeve 2 and the central tube 1 coaxially.

[0067] Exemplarily, the bearing member 5 is a needle roller bearing, the inner bush of the bearing is interference fit with the outer wall of the center tube 1, and the outer bush of the bearing is interference fit with the inner wall of the rotating sleeve 2, so as to realize the coaxial rotation connection between the rotating sleeve 2 and the center tube 1.

[0068] In some embodiments, combined Figure 4 As shown, the internal weld grinding system further includes a power supply module 9, which is electrically connected to the driving device 3, the laser 401, the laser 401 telescopic device 402, and the laser 401 telescopic device 402 detection device 403 respectively.

[0069] In some embodiments, combined Figure 4 As shown, the internal weld grinding system includes a rotating motor 301 , a telescopic device 402 , and a motor driver 10 . The motor driver 10 is electrically connected to the rotating motor 301 and the telescopic device 402 , respectively.

[0070] In some embodiments, combined Figure 4 As shown, the internal weld grinding system further includes a controller 11 and a touch screen 12 . The laser 401 , the detection device 403 , the motor driver 10 , and the touch screen 12 are electrically connected to the controller 11 , respectively.

[0071] In this embodiment, the functions of the controller 11 include at least storing the weld observation system control software, receiving control instructions issued by the touch screen 12, controlling the rotation of the rotary motor 301, controlling the focal length adjustment of the laser 401, controlling the energy output of the laser 401, receiving image data and transmitting it to the touch screen 12, etc.

[0072] Exemplarily, the controller 11 includes: a processor and a memory.

[0073] The processor may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor may be implemented in at least one of the following hardware forms: a DSP (digital signal processing), an FPGA (field-programmable gate array), or a PLA (programmable logic array). The processor may also include a main processor and a coprocessor. The main processor is used to process data in the awake state, also known as a CPU (central processing unit); the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor may be integrated with a GPU (graphics processing unit), which is responsible for rendering and drawing the content required to be displayed on the display screen.

[0074] The memory may include one or more computer-readable storage media, which may be non-transitory. The memory may also include high-speed random access memory and non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices.

[0075] The controller 11 may also optionally include a peripheral device interface and at least one peripheral device. The processor, memory, and peripheral device interface may be connected via a bus or signal lines. Each peripheral device may be connected to the peripheral device interface via a bus, signal lines, or circuit boards. Specifically, the peripheral device includes a touch screen display 12.

[0076] The peripheral device interface can be used to connect at least one I / O (input / output)-related peripheral device to the processor and memory. In some embodiments, the processor, memory, and peripheral device interface are integrated on the same chip or circuit board. In other embodiments, any one or two of the processor, memory, and peripheral device interface can be implemented on separate chips or circuit boards, although this embodiment is not limited to this.

[0077] The touchscreen display 12 is used to display a user interface (UI). This UI can include graphics, text, icons, videos, or any combination thereof. It also has the ability to capture touch signals on or above the surface of the touchscreen display 12. These touch signals can be input as control signals to a processor for processing. The touchscreen display 12 can also be used to provide virtual buttons and / or a virtual keyboard, also known as soft buttons and / or a soft keyboard.

[0078] Exemplarily, the weld grinding process is:

[0079] When a button on the touch screen 12 is clicked, the detection device 403 receives a signal, the camera 4031 is activated, and the inner weld 13 is photographed. The touch screen 12 receives the image, and the technician observes the weld.

[0080] When a button on the touch screen 12 is clicked, the telescopic device 402 receives the signal, drives the laser 401 to automatically adjust the focal length, and begins grinding the inner weld 13. At the same time, the rotary motor 301 starts running, driving the grinding assembly 4 to rotate. During this time, grinding parameters can be added and / or modified in the controller 11.

[0081] By clicking a button on the touch screen 12 , the telescopic device 402 automatically resets and the rotating motor 301 stops running.

[0082] Optionally, the images captured by the camera 4031 can be stored in a memory.

[0083] Optionally, the control of the rotating motor 301 and the camera 4031, and the signal exchange between the video and the display screen can be transmitted through a wireless module, which can be a WiFi module, a Bluetooth module, or a radio frequency circuit module.

[0084] The internal weld grinding system of this embodiment uses a 360-degree rotatable laser 401 installed in front of the welding body of the internal welder to perform high-precision and high-speed grinding on the internal weld 13 welded by the internal welder. The camera 4031 is used for precise positioning and real-time monitoring of the grinding and processing results, thus solving the problem of the difficulty in meeting the forming requirements of the internal weld 13 of the pipe 16.

[0085] On the other hand, the embodiment of the present disclosure also provides an internal welding machine, Figure 5 As shown, it includes the above-mentioned internal weld grinding system;

[0086] The internal welding machine also includes a welding machine body 14 . The center pipe 1 of the internal weld grinding system is axially threadedly connected to the welding machine body 14 via a fixed pipe 15 . The internal weld grinding system is configured to perform laser grinding on the internal weld 13 processed by the welding machine body 14 .

[0087] The internal welding machine of this embodiment fixes the fixed pipe 15 to the front of the internal welding machine through threaded connection. The connection power line and control line of the internal weld grinding system can be drawn out from the internal welding machine.

[0088] Optionally, the control program of the internal weld 13 laser welding system is written into the controller 11 of the internal welder, so that the internal welder and the internal weld grinding system can be controlled separately or simultaneously through a single terminal device, thereby improving the integration of the internal welder product.

[0089] When using the internal welding machine of this embodiment:

[0090] Start the internal welding machine to complete the welding of the inner root weld of pipeline 16.

[0091] The inner welding machine is controlled to retreat a target distance so that the laser 401 is aimed at the already welded inner weld 13. At this time, the detection device 403 is optionally started to observe the weld position through the camera 4031.

[0092] The focal length of the camera 4031 is adjusted through the touch screen 12 to make the image clear and meet the observation requirements.

[0093] The inner weld seam grinding system is controlled by the touch screen 12 to start operation, and the laser 401 performs high-precision grinding on the inner weld seam 13 of the pipe 16 .

[0094] Optionally, the laser 401 of the internal weld grinding system of this embodiment uses a pulsed infrared fiber laser with a Gaussian spot distribution. The processing accuracy can reach 0.01 mm, and the surface roughness can reach 0.1 μm to 0.5 μm. The laser feed rate is 0.05 mm / r, and the grinding speed is 10 m / min.

[0095] Optionally, while the grinding operation is in progress, the technicians can monitor and observe the weld processing effect in real time. If there is any problem, they can make a timely location record and take local grinding treatment measures according to the corresponding welding standard requirements.

[0096] The above descriptions are merely embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. An internal weld grinding system, characterized in that: The internal weld grinding system comprises: a central tube (1), a rotating sleeve (2), a driving device (3), and a grinding assembly (4); The central tube (1) is axially connected to a welding machine body (14) of an internal welding machine; The rotating sleeve (2) is rotatably mounted outside the central tube (1), a bearing member (5) is provided between the rotating sleeve (2) and the central tube (1), and the driving device (3) is used to drive the rotating sleeve (2) to rotate around the central tube (1); The grinding assembly (4) is arranged on the rotating sleeve (2) and rotates with the rotating sleeve (2); the grinding assembly (4) comprises a laser (401), a telescopic device (402) and a detection device (403); one end of the telescopic device (402) is connected to the rotating sleeve (2), and the end thereof faces the outside of the rotating sleeve (2); the laser (401) and the detection device (403) are arranged at the end of the telescopic device (402); the laser (401) and the detection device (403) move along the radial direction of the rotating sleeve (2) with the telescopic device (402); the laser (401) is used for performing contactless grinding on the internal weld seam processed by the internal welding machine; The detection device (403) includes a camera (4031), and the camera (4031) is arranged on the peripheral side of the laser (401); The grinding assembly (4) further comprises a protective cover (404), the protective cover (404) being arranged on the laser (401) and the camera (4031); the protective cover (404) comprising a lens (4041) and a protective edge (4042), the protective edge (4042) being provided with circumferentially distributed protective air holes (405); The lens (4041) is made of a transparent material and serves as a transmission area for the laser (401) and the camera (4031); the protective edge (4042) is a circumferential convex edge that is higher than the lens (4041) along the radial direction of the rotating sleeve (2); The shielding gas can blow the lens (4041) on the inner circle of the protective edge (4042) through the shielding gas hole (405), so as to prevent welding slag and dust from blocking the lens (4041).

2. The internal weld grinding system according to claim 1, characterized in that: The telescopic device (402) is any one of a linear motor, a telescopic cylinder, a rack and pinion mechanism, and a worm gear mechanism.

3. The internal weld grinding system according to claim 1, characterized in that: The driving device (3) comprises a rotating motor (301), a gear and an inner gear ring. The rotating motor (301) is mounted on the inner wall of the central tube (1). The rotating motor (301) is connected to the gear. The inner gear ring is arranged on the inner wall of the rotating sleeve (2). An opening is provided on the central tube (1). The gear and the inner gear ring are engaged through the opening.

4. The internal weld grinding system according to claim 3, characterized in that: The rotating motor (301) is mounted on the inner wall of the central tube (1) via a motor fixing frame (8), the motor fixing frame (8) being fixed to the inner wall of the central tube (1) via a first screw, the rotating motor (301) comprising an output shaft (6), and the gear being mounted on the output shaft (6) via a flat key (7).

5. The internal weld grinding system according to any one of claims 1 to 4, characterized in that: The internal weld grinding system further comprises a power supply module (9), wherein the power supply module (9) is electrically connected to the driving device (3), the laser (401), the telescopic device (402), and the detection device (403), respectively.

6. The internal weld grinding system according to claim 5, characterized in that: The internal weld grinding system further comprises a rotating motor (301) and a motor driver (10), wherein the motor driver (10) is electrically connected to the rotating motor (301) and the telescopic device (402), respectively.

7. The internal weld grinding system according to claim 6, characterized in that: The internal weld grinding system further comprises a controller (11) and a touch screen (12); the laser (401), the detection device (403), the motor driver (10), and the touch screen (12) are electrically connected to the controller (11), respectively.

8. An internal welding machine, characterized in that: The invention comprises an internal weld grinding system according to any one of claims 1 to 7; the internal welding machine further comprises a welding machine body (14), the center pipe (1) of the internal weld grinding system is axially connected to the welding machine body (14) through a fixed pipe (15), and the internal weld grinding system is configured to perform laser grinding on the internal weld (13) processed by the welding machine body (14).

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