A clamping device for precision steel tube flaw detector

Abstract

This utility model relates to the field of steel pipe flaw detection technology, and discloses a clamping device for a precision steel pipe flaw detector. It includes a base, with symmetrically arranged support plates on the vertical portion of the base, the support plates located inside the base. Clamping blocks are symmetrically arranged between the support plates, and push rods are symmetrically arranged on the outer sides of the clamping blocks. The push rods and clamping blocks are connected by a connecting mechanism. One end of the push rod on the outer side passes through one of the support plates and is connected to a driving assembly. A support assembly is provided at the top inside the base. The connecting mechanism includes an insert block, which is fixedly installed on the outer side of the clamping blocks. A slot adapted to the insert block is opened at one end of the push rod on the inner side. A sliding sleeve is slidably fitted on the outer side of one end of the push rod. Several through grooves are symmetrically opened on the outer wall of the push rod, and ball bearings are provided in the through grooves. This utility model achieves quick assembly and disassembly of the clamping blocks through the connecting mechanism, stable clamping of the steel pipe by the driving assembly using a double-rod hydraulic cylinder, and pallet lifting and lowering driven by a motor by the support assembly, thus meeting the clamping and adaptation requirements for precision steel pipe flaw detection.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe flaw detection technology, and in particular to a clamping device for a precision steel pipe flaw detector. Background Technology

[0002] In the production and quality inspection of precision steel pipes, flaw detection is a crucial step in ensuring their performance and safety. The clamping device, as a core component of the flaw detector, directly affects the accuracy and efficiency of flaw detection due to its stability, adaptability, and operational efficiency. Currently, there are various types of flaw detection equipment for precision steel pipes. Among them, magnetic particle flaw detectors are widely used in the flaw detection of ferromagnetic precision steel pipes due to their extremely high sensitivity in detecting surface and near-surface defects, and are particularly suitable for the quality inspection of ferromagnetic precision steel pipes such as carbon steel and alloy steel.

[0003] According to patent announcement number CN222768202U, a clamping mechanism for a magnetic particle flaw detector is disclosed. Compared with the existing ordinary magnetic particle flaw detector clamping device, this clamping mechanism can quickly clamp the workpiece by driving the fixed chuck through the setting of the compression spring, thereby improving the installation speed of the workpiece. Through the setting of the threaded extension rod, the workpiece that is easy to slip can be further clamped to prevent it from loosening and falling. The clamping angle of the fixed chuck can also be adjusted by rotation.

[0004] However, the above structure still has shortcomings in actual use: although it can select and replace the appropriate fixed chuck according to the different workpieces being clamped, the chuck and connecting parts are connected by threads, which makes the disassembly and assembly of the chuck cumbersome and inconvenient. Utility Model Content

[0005] In view of the existing clamping mechanism of the magnetic particle flaw detector, although the fixed chuck can be replaced to adapt to different workpieces, the chuck and connecting parts are connected by threads, which makes the chuck disassembly and assembly operation cumbersome and inconvenient. Therefore, this utility model is proposed.

[0006] To solve the above technical problems, this utility model provides the following technical solution: a clamping device for a precision steel pipe flaw detector, including a base, the vertical portion of the base is symmetrically provided with support plates, and the support plates are located inside the base, clamping blocks are symmetrically provided between the support plates, the clamping blocks are symmetrically provided with push rods on the outer side, and the push rods and clamping blocks are connected by a connecting mechanism, one end of the push rod on the outer side passes through one side support plate and is connected to a driving assembly, and a support assembly is provided at the top inside the base; The connecting mechanism includes an insert block, which is fixedly installed on the outer side of the clamping block. The push rod has a slot adapted to the insert block at one end on the inner side. A sliding sleeve is slidably fitted on the outer side of one end of the push rod. Several through grooves are symmetrically opened on the outer wall of the push rod. Ball bearings are provided in the through grooves. Limiting grooves adapted to the ball bearings are symmetrically opened on the outer wall of the insert block.

[0007] As a preferred embodiment, the connecting mechanism further includes a baffle, which is fixedly sleeved on the outside of the push rod. A reset groove is formed on the inner wall of one end of the sliding sleeve, and the baffle is located in the reset groove. A spring is connected to the end of the baffle near the clamping block, and the two ends of the spring are fixedly connected to the inner wall of the baffle and the reset groove, respectively. A misalignment groove is formed on the inner wall of the end of the sliding sleeve near the clamping block.

[0008] As a preferred embodiment, the inner wall of the reset groove is symmetrically provided with several guide rails, and the guide rails pass through the baffle, and the guide rails are slidably connected to the baffle.

[0009] As a preferred embodiment, a slider is fixedly connected to one end of the clamping block near the vertical part of the base, and a sliding groove adapted to the slider is opened on the side wall of the vertical part of the base. The insert is a hexagonal columnar structure, and the outer wall of the sliding sleeve is provided with several anti-slip textures.

[0010] As a preferred embodiment, the drive assembly includes a dual-rod hydraulic cylinder, which is fixedly installed on the back of the vertical part of the base. Connecting plates are fixedly connected to both ends of the dual-rod hydraulic cylinder. One end of the connecting plate is fixedly connected to one end of a push rod. The outer side of the base is symmetrically provided with mounting grooves that fit the connecting plates. Telescopic guide rods are embedded in the inner wall of the mounting grooves, and the telescopic ends of the telescopic guide rods are fixedly connected to the connecting plates. The telescopic guide rods are located on the opposite inner sides of the two connecting plates.

[0011] As a preferred embodiment, the support assembly includes a bracket, which is fixedly installed at the bottom of the base and located below the clamping block. A tray is provided above the bracket, and a sleeve rod is connected to the bottom of the tray. The lower end of the sleeve rod passes through the bracket, and a screw is threaded to the inner side of the sleeve rod. A motor is connected to the lower end of the screw rod, and the motor is embedded in the bottom of the base.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model, through a connecting mechanism, allows the sliding sleeve to slide outside the push rod. Simultaneously, the inner wall of the reset groove, in conjunction with the baffle, compresses the spring until the misalignment groove aligns with the ball. Then, pulling the clamping block moves the insert block out of the slot. This causes the inner wall of the limiting groove to compress and push the ball out of the limiting groove, allowing one end of the ball to enter the misalignment groove. The clamping block can then be disassembled quickly. Next, the insert block at one end of the clamping block to be replaced is inserted into the slot. The insert block compresses and pushes the ball to the outside of the slot until it is fully inserted. Releasing the force on the sliding sleeve allows the spring to reposition the sleeve, and the inner wall of the sliding sleeve compresses and pushes the ball into the limiting groove. This completes the quick installation and fixation of the clamping block, making it easy to assemble and disassemble and more convenient to use.

[0013] 2. This utility model uses a drive assembly to synchronously drive the connecting plates on both sides of the double-rod hydraulic cylinder to move the two push rods synchronously, thereby causing the two clamping blocks to move in opposite directions, thus clamping and fixing the precision steel pipe to be tested, enabling it to be clamped and fixed quickly and stably.

[0014] 3. This utility model, through the support component, can drive the sleeve rod to move the pallet up and down by rotating the screw of the motor in both directions, so as to make corresponding position adjustments according to the size of the steel pipe being clamped. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a rear view schematic diagram of the structure between the base and the double-rod hydraulic cylinder of this utility model; Figure 3 This is a partial cross-sectional view of the structure between the push rod and the clamping block of this utility model; Figure 4 This is a schematic diagram of the structure between the clamping block and the inserting block of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Base; 2. Support plate; 3. Push rod; 4. Clamping block; 5. Connecting plate; 6. Double-rod hydraulic cylinder; 7. Telescopic guide rod; 8. Slider; 9. Slide groove; 10. Insert block; 11. Sliding sleeve; 12. Through groove; 13. Ball bearing; 14. Reset groove; 15. Baffle; 16. Guide rail; 17. Spring; 18. Misalignment groove; 19. Slot; 20. Limiting groove; 21. Bracket; 22. Tray; 23. Sleeve rod; 24. Screw; 25. Motor. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Reference Figure 1 - Figure 4 As shown, a clamping device for a precision steel pipe flaw detector is provided, including a base 1. Support plates 2 are symmetrically arranged on the vertical portion of the base 1, with the support plates 2 located inside the base 1. Clamping blocks 4 are symmetrically arranged between the support plates 2. Push rods 3 are symmetrically arranged on the outer side of the clamping blocks 4, and the push rods 3 and clamping blocks 4 are connected by a connecting mechanism. One end of the push rod 3 on the outer side passes through one side of the support plate 2 and is connected to a driving assembly. A support assembly is provided at the top inside the base 1. Through the coordinated cooperation of the base 1, support plates 2, push rods 3, clamping blocks 4, connecting mechanism, driving assembly, and support assembly, a complete and stable clamping device structure is constructed, providing a basic framework for stable clamping during the precision steel pipe flaw detection process. The clear division of labor among the components ensures the overall reliability of the device's operation. The connecting mechanism includes a plug 10, which is fixedly installed on the outer side of the clamping block 4. The inner side of the push rod 3 has a slot 19 that matches the plug 10. A sliding sleeve 11 is slidably fitted on the outer side of one end of the push rod 3. Several through grooves 12 are symmetrically opened on the outer wall of the push rod 3. Ball bearings 13 are provided in the through grooves 12. The outer wall of the plug 10 has symmetrically opened limiting grooves 20 that match the ball bearings 13. Through the matching and cooperation of the plug 10 and the slot 19, the clamping block 4 and the push rod 3 are initially positioned. Then, with the help of the sliding sleeve 11, the ball bearings 13 in the through grooves 12 and the limiting grooves 20 on the plug 10, a structural foundation is laid for the quick locking of the clamping block 4 and the push rod 3. Compared with the traditional threaded connection, it has the potential to be easy to disassemble and assemble.

[0019] In this example, the connecting mechanism also includes a baffle 15, which is fixedly sleeved on the outside of the push rod 3. A reset groove 14 is provided on the inner wall of one end of the sliding sleeve 11, and the baffle 15 is located in the reset groove 14. A spring 17 is connected to the end of the baffle 15 near the clamping block 4, and the two ends of the spring 17 are fixedly connected to the inner wall of one end of the baffle 15 and the reset groove 14, respectively. A misalignment groove 18 is provided on the inner wall of the end of the sliding sleeve 11 near the clamping block 4. Through the cooperation of the baffle 15, the reset groove 14 and the spring 17, the sliding sleeve 11 is provided with automatic reset capability, eliminating the need for manual reset of the sliding sleeve 11 and making operation more labor-saving. The misalignment groove 18 can provide space for the ball 13 to be accommodated when the clamping block 4 is disassembled and assembled, ensuring smooth insertion and removal of the insert block 10, further improving the convenience of disassembling and assembling the clamping block 4, and solving the problem of cumbersome disassembly and assembly of traditional threaded connections.

[0020] In this example, the inner wall of the reset groove 14 is symmetrically provided with several guide rails 16, and the guide rails 16 pass through the baffle 15. The guide rails 16 and the baffle 15 are slidably connected. The guide rails 16 can precisely limit the sliding trajectory of the sliding sleeve 11, so as to prevent the sliding sleeve 11 from shifting or rotating during the sliding process, ensuring that the misalignment groove 18 can accurately correspond to the ball 13, ensuring the accuracy of the locking and unlocking action of the connection mechanism, and improving the stability of the device operation.

[0021] In this example, a slider 8 is fixedly connected to one end of the clamping block 4 near the vertical part of the base 1. A groove 9 adapted to the slider 8 is opened on the side wall of the vertical part of the base 1. The insert 10 is a hexagonal columnar structure, and the outer wall of the sliding sleeve 11 is provided with several anti-slip textures. The cooperation between the slider 8 and the groove 9 can guide and limit the movement trajectory of the clamping block 4, prevent the clamping block 4 from shifting during the clamping process, ensure the coaxiality of the clamping, and improve the flaw detection accuracy. The hexagonal columnar insert 10 can prevent relative rotation between the clamping block 4 and the push rod 3, ensuring clamping stability. The anti-slip textures on the outer wall of the sliding sleeve 11 can increase the friction between the hand and the sliding sleeve 11, prevent slippage during operation, and improve the ease of operation.

[0022] In this example, the driving component includes a double-rod hydraulic cylinder 6, which is fixedly installed on the back of the vertical part of the base 1. Connecting plates 5 are fixedly connected to both ends of the double-rod hydraulic cylinder 6. One end of each connecting plate 5 is fixedly connected to one end of a push rod 3. The base 1 has symmetrically arranged mounting slots on its outer side that fit the connecting plates 5. Telescopic guide rods 7 are embedded in the inner wall of the mounting slots, and the telescopic ends of the telescopic guide rods 7 are fixedly connected to the connecting plates 5. The telescopic guide rods 7 are located on the opposite inner sides of the two connecting plates 5. Using the double-rod hydraulic cylinder 6 as the driving source, the connecting plates 5 on both sides can be driven synchronously to move the push rods 3, ensuring that the clamping blocks 4 on both sides move synchronously in opposite directions, resulting in uniform clamping force and avoiding flaw detection errors caused by eccentric clamping of the precision steel pipe. The telescopic guide rods 7 can guide and support the movement of the connecting plates 5, enhancing the stability of the push rod 3's movement and further improving clamping accuracy and stability, thus meeting the high precision requirements of clamping precision steel pipes.

[0023] In this example, the support assembly includes a bracket 21, which is fixedly installed at the bottom of the base 1 and located below the clamping block 4. A tray 22 is provided above the bracket 21, and a sleeve rod 23 is connected to the bottom of the tray 22. The lower end of the sleeve rod 23 passes through the bracket 21, and a screw 24 is threadedly connected to the inner side of the sleeve rod 23. A motor 25 is connected to the lower end of the screw 24 and is embedded in the bottom of the base 1. The motor 25 drives the screw 24 to rotate, thereby raising and lowering the sleeve rod 23 and the tray 22. The support height can be flexibly adjusted according to the diameter of the precision steel pipe to ensure stable support for steel pipes of different specifications and prevent the steel pipe from sagging due to its own weight, which could cause clamping deformation or displacement of the flaw detection position. The bracket 21 provides support and guidance for the sleeve rod 23, ensuring the stability of the tray 22 during the raising and lowering process and further improving the adaptability of the device to precision steel pipes of different specifications.

[0024] During use, the overall clamping preparation and support adjustment principles Before clamping the precision steel pipe for flaw detection, the motor 25 in the support assembly is started according to the diameter of the steel pipe to be tested. The motor 25 drives the screw 24 connected to the output end to rotate. Since the screw 24 is threadedly connected to the inner side of the sleeve 23, and the upper end of the sleeve 23 is fixed to the tray 22 and the lower end passes through the bracket 21, the rotation of the screw 24 will be converted into the lifting and lowering motion of the sleeve 23, which in turn drives the tray 22 to move up and down along the guide direction of the bracket 21 until the height of the tray 22 matches the support requirements of the steel pipe, thus completing the support height adjustment and preventing the steel pipe from sagging due to its own weight, which could cause clamping deformation or flaw detection position displacement. Steel pipe clamping and fixing principle After placing the precision steel pipe to be inspected on the height-adjusted tray 22, the double-rod hydraulic cylinder 6 in the drive assembly is activated. The piston rods at both ends of the double-rod hydraulic cylinder 6 extend synchronously, driving the connecting plates 5, which are fixed on the piston rods, to move inward. One end of the connecting plate 5 is fixedly connected to the push rod 3, and the push rod 3 passes through the support plate 2. Therefore, the connecting plate 5 will drive the push rod 3 to slide inward along the through hole of the support plate 2. At the same time, the telescopic guide rod 7 in the mounting groove on the outside of the base 1 extends and retracts synchronously with the connecting plate 5, providing guidance and support for the movement of the connecting plate 5 and the push rod 3, and preventing displacement. The inner side of the push rod 3 is connected to the clamping block 4 through the connecting mechanism. The movement of the push rod 3 will drive the clamping block 4 to move closer to the steel pipe. The slider 8 of the clamping block 4 near the vertical part of the base 1 slides along the sliding groove 9 on the side wall of the base 1, further ensuring the stability of the movement trajectory of the clamping block 4, until the clamping blocks 4 on both sides are tightly attached to the outer wall of the steel pipe, realizing the stable clamping of the steel pipe and providing stable positioning for flaw detection. Clamp 4 disassembly and replacement principle When it is necessary to replace the clamp 4 according to different diameter steel pipes, pull the sliding sleeve 11 in the connecting mechanism away from the clamp 4. The sliding sleeve 11 slides along the outside of the push rod 3. At this time, the spring 17 in the reset groove 14 on the inner wall of the sliding sleeve 11 is compressed under the action of the baffle 15. At the same time, the guide rail 16 on the inner wall of the reset groove 14 limits the sliding trajectory of the sliding sleeve 11 to prevent the sliding sleeve 11 from rotating and deviating. When the misalignment groove 18 on the sliding sleeve 11 moves to the position corresponding to the ball 13 in the through groove 12 on the outer wall of the push rod 3, pull the clamp 4. The insert 10 on the outside of the clamp 4 is pulled out from the slot 19 on the inner side of the push rod 3. The limiting groove 20 on the outer wall of the insert 10 Squeeze the ball bearing 13 so that one end of the ball bearing 13 moves out of the limiting groove 20 and into the misalignment groove 18, and the old clamping block 4 can be removed smoothly. When replacing the new clamping block 4, align the insert 10 of the new clamping block 4 with the slot 19 and insert it. The insert 10 squeezes the ball bearing 13 so that it retracts into the through groove 12 until the insert 10 is fully inserted into the slot 19. At this time, the limiting groove 20 is aligned with the ball bearing 13. Release the sliding sleeve 11, and the spring 17 returns to its original position and pushes the sliding sleeve 11 toward the clamping block 4. The inner wall of the sliding sleeve 11 squeezes the ball bearing 13 so that one end of the ball bearing 13 is embedded in the limiting groove 20, thus completing the fixed installation of the new clamping block 4. The whole process does not require tools and is convenient and efficient.

[0025] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A clamping device for a precision steel pipe flaw detector, comprising a base (1), characterized in that: The base (1) has symmetrical support plates (2) on its vertical part, and the support plates (2) are located inside the base (1). The support plates (2) are symmetrically arranged with clamping blocks (4) between them. The clamping blocks (4) are symmetrically arranged with push rods (3) on their outer side. The push rods (3) and the clamping blocks (4) are connected by a connecting mechanism. The push rods (3) have a drive assembly connected to one end of the outer side through one side of the support plate (2). The base (1) has a support assembly at the top inside. The connecting mechanism includes a plug (10), which is fixedly installed on the outer side of the clamp (4). The push rod (3) has a slot (19) adapted to the plug (10) at one end on the inner side. A sliding sleeve (11) is slidably sleeved on the outer side of one end of the push rod (3). Several through grooves (12) are symmetrically opened on the outer wall of the push rod (3). A ball (13) is provided in the through groove (12). A limiting groove (20) adapted to the ball (13) is symmetrically opened on the outer wall of the plug (10).

2. The clamping device for a precision steel pipe flaw detector according to claim 1, characterized in that: The connecting mechanism also includes a baffle (15), which is fixedly sleeved on the outside of the push rod (3). A reset groove (14) is provided on the inner wall of one end of the sliding sleeve (11). The baffle (15) is located in the reset groove (14). A spring (17) is connected to one end of the baffle (15) near the clamping block (4). The two ends of the spring (17) are fixedly connected to the inner wall of one end of the baffle (15) and the reset groove (14), respectively. A misalignment groove (18) is provided on the inner wall of one end of the sliding sleeve (11) near the clamping block (4).

3. The clamping device for a precision steel pipe flaw detector according to claim 2, characterized in that: The inner wall of the reset groove (14) is symmetrically provided with several guide rails (16), and the guide rails (16) pass through the baffle (15). The guide rails (16) and the baffle (15) are slidably connected.

4. A clamping device for a precision steel pipe flaw detector according to claim 3, characterized in that: The clamping block (4) is fixedly connected to a slider (8) at one end near the vertical part of the base (1). The vertical part of the base (1) has a sliding groove (9) adapted to the slider (8) on its side wall. The insert (10) is a hexagonal columnar structure. The outer wall of the sliding sleeve (11) has several anti-slip patterns.

5. A clamping device for a precision steel pipe flaw detector according to claim 2, characterized in that: The drive assembly includes a double-rod hydraulic cylinder (6), which is fixedly installed on the back of the vertical part of the base (1). The two ends of the double-rod hydraulic cylinder (6) are respectively fixedly connected to connecting plates (5). One end of the connecting plate (5) is fixedly connected to one end of a push rod (3) on one side. The outer side of the base (1) is symmetrically provided with mounting grooves that are adapted to the connecting plates (5). The inner wall of the mounting groove is embedded with a telescopic guide rod (7), and the telescopic end of the telescopic guide rod (7) is fixedly connected to the connecting plate (5). The telescopic guide rod (7) is located on the opposite inner side of the two connecting plates (5).

6. A clamping device for a precision steel pipe flaw detector according to claim 2, characterized in that: The support assembly includes a bracket (21), which is fixedly installed at the bottom of the base (1) and located below the clamping block (4). A tray (22) is provided above the bracket (21), and a sleeve rod (23) is connected to the bottom of the tray (22). The lower end of the sleeve rod (23) passes through the bracket (21). A screw rod (24) is threaded on the inner side of the sleeve rod (23), and a motor (25) is connected to the lower end of the screw rod (24). The motor (25) is embedded in the bottom of the base (1).

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