An automatic inspection device for spiral steel pipe ends

Abstract

This invention relates to the field of spiral steel pipe inspection technology, and discloses an automatic inspection device for spiral steel pipe ends. It includes a support base placed horizontally on the ground, with the steel pipe body to be inspected placed on top of the support base. Mounting plates are fixedly installed on the left and right sides of the support base, and a longitudinally arranged support frame is installed above the mounting plates. The support frame is slidably connected to an electric slide rail fixedly installed on the upper surface of the mounting plates. In this automatic spiral steel pipe end inspection device, a pump injects air into a fixed plate through a first connecting pipe. The injected air is then injected into a compression air bladder through a second connecting pipe, causing the compression air bladder to expand. This compression air bladder pushes a grinding plate to fit against the end face of the steel pipe body. Combined with the rotation of the steel pipe body, this achieves the purpose of grinding and removing rust stains from the end face. The air in the fixed plate is ejected from a cleaning nozzle above, thereby using the airflow from the cleaning nozzle to clean the surfaces of the visual inspection camera and laser scanner.

Description

Technical Field

[0001] This invention relates to the field of spiral steel pipe testing technology, specifically to an automatic testing device for the ends of spiral steel pipes. Background Technology

[0002] Spiral steel pipe, also known as spiral submerged arc welded steel pipe, is a type of welded steel pipe made by rolling strip steel into a tubular shape at a certain spiral angle and simultaneously performing double-sided submerged arc welding on both the inner and outer sides. Spiral steel pipes are generally welded when butt-jointed, so the end face of the spiral steel pipe has high requirements. It is generally necessary to use testing equipment to inspect the end face of the spiral steel pipe (including flatness, ovality, etc.).

[0003] In the prior art, Chinese Patent Application No. CN202310920646.0 discloses a steel pipe end face inspection device and method, wherein the device includes: a motor roller conveyor for conveying steel pipes; a measuring module located on one side of the motor roller conveyor for measuring the diameter of the steel pipe; an auxiliary light source located on one side of the steel pipe axis for irradiating the end face of the steel pipe to generate a diffuse reflection surface; a grinding module equipped with a floating grinding head for grinding the steel pipe; an analysis module located on one side of the motor roller conveyor for detecting the chemical element composition and content of the steel pipe; and a vision module located on one side of the steel pipe axis.

[0004] For example, in the prior art, Chinese patent application number CN201720252425.0 discloses a detection device for the end face of a steel pipe, including a positioning plate, a rotating assembly, a rangefinder, and a fixed frame. The rotating assembly drives the steel pipe to be detected, which is set above it, to rotate along its own axis. The positioning plate is set at one end of the rotating assembly and is vertically arranged. The rangefinder is set horizontally on the fixed frame. The detection end of the rangefinder is set at one end close to the positioning plate and is aligned with the lower end face of the steel pipe to be detected.

[0005] For example, in the prior art, Chinese patent application number CN201810909128.8 discloses a device for detecting internal and external defects of seamless steel pipes, including a rubber roller, an endoscope, a bracket, a stepper motor screw, a guide rail, a sliding block, a fixed cylinder, a pull rope, and a telescopic rod. The rubber roller is fixed to the upper surface of the rotating platform through a bearing seat. The endoscope is mounted on an area array camera. The bracket is vertically fixed to the stepper motor screw, which is located on the left side of the rotating platform. The guide rail is located on the front side of the rotating platform. The sliding block is located on the upper end of the guide rail. The fixed cylinder is vertically fixed to the upper surface of the sliding block. The pull rope is connected to the sliding block. The telescopic rod is installed inside the fixed cylinder. This design achieves the effect of fast, stable, simple, and comprehensive detection of defects in the internal and external walls of seamless steel pipes.

[0006] Based on the above information, it can be seen that the existing technology for end face inspection of steel pipes generally uses equipment such as vision cameras or sensors. However, in actual use, rust stains may appear on the surface of the steel pipes during storage, which not only affects the accuracy of the inspection but may also contaminate the inspection equipment and cause misjudgments. Summary of the Invention

[0007] The purpose of this invention is to provide an automatic inspection device for the ends of spiral steel pipes, so as to solve the problem mentioned in the background art that the lack of end face cleaning affects the accuracy of inspection.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an automatic inspection device for the ends of spiral steel pipes, comprising a support base placed horizontally on the ground, a steel pipe body to be inspected placed on the support base, mounting plates fixedly installed on the left and right sides of the support base, a longitudinally arranged support frame installed on the mounting plates, and the support frame slidably connected to an electric slide rail fixedly installed on the upper surface of the mounting plates, a fixed plate fixedly installed on the inner surface of the support frame, and a rotating disk driven by a drive motor provided on the outside of the fixed plate, a fixed gripper provided on the inner side of the rotating disk, a cleaning nozzle fixedly installed on the upper surface of the fixed plate, and the cleaning nozzle connected to a negative pressure mechanism provided on the outer surface of the support frame, and the cleaning nozzle corresponding to a visual inspection camera and a laser scanner fixedly installed on the outer surface of the support frame, a sliding block provided on the upper surface of the support base, and a mounting frame rotatably installed on the upper rear side of the sliding block, and an ultrasonic flaw detector installed on the upper end of the mounting frame, and a cleaning sponge for cleaning the outer surface of the steel pipe body fixedly installed on the upper lower end of the sliding block.

[0009] Preferably, the negative pressure mechanism includes a collection box with a filter structure fixedly installed on the outer surface of the support frame, and the fixed plate is hollow inside, and a dry sponge is fixedly installed inside the fixed plate.

[0010] Preferably, a conveying pump is fixedly installed on the upper surface of the collection box, and the conveying pump is connected to the inside of the fixed plate through a first connecting pipe.

[0011] Preferably, the fixed plate is connected to the compression airbag through the second connecting pipe at the upper end, and the compression airbag is fixedly installed on the outer surface of the support frame, and a grinding plate for grinding the end face of the steel pipe body is fixedly installed at the front end of the compression airbag.

[0012] Preferably, two symmetrical fixing frames are fixedly installed on the upper surface of the support base, and a support block with an inclined upper surface is provided above the fixing frame, and a buffer spring is fixedly installed between the support block and the fixing frame.

[0013] Preferably, a friction roller that rotatably contacts and rubs against the outer surface of the steel pipe body is rotatably mounted on the upper surface of the support block, and a horizontally arranged connecting plate is fixedly installed between the left and right support blocks, with the sliding block located above the connecting plate.

[0014] Preferably, a guide slide rod and a reciprocating screw are installed between the left and right support blocks. The guide slide rod is slidably connected to the sliding block, and the reciprocating screw is threadedly connected to the sliding block.

[0015] Preferably, a driven gear for driving the reciprocating screw to rotate is fixedly installed at the top end of the screw, and the driven gear is meshed with the driving gear, and the driving gear is fixedly connected to the friction roller.

[0016] Preferably, the sliding block has a storage compartment inside, and the storage compartment is connected to the cleaning sponge, and a piston plate is slidably installed inside the storage compartment.

[0017] Preferably, the storage compartment is connected to the blower airbag via a delivery pipe, and the blower airbag is fixedly installed on the lower surface of the connecting plate, and a one-way valve is provided on the outside of the delivery pipe.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the automatic inspection device for spiral steel pipe ends adopts a novel structural design, the specific details of which are as follows:

[0019] 1. The rotating disk is inserted into the steel pipe body by sliding the support frame on the electric slide rail. Then, the steel pipe body is clamped and fixed at both ends by the fixed claw. Then, the drive motor drives the rotating disk to rotate, so that the steel pipe body rotates as a whole. At this time, the visual inspection camera and laser scanner are used to achieve the purpose of inspecting the end face of the steel pipe body.

[0020] Furthermore, before inspection, the delivery pump is turned on, allowing air to be injected into the fixed plate through the first connecting pipe. The injected air is then injected into the compression airbag through the second connecting pipe, causing the compression airbag to expand. This compression airbag pushes the grinding plate to fit the end face of the steel pipe body. Then, in conjunction with the rotation of the steel pipe body, the end face is ground to remove rust stains. The air in the fixed plate is also sprayed out from the cleaning nozzle above (the exhaust speed of the cleaning nozzle is less than the air intake speed of the first connecting pipe), thus using the airflow from the cleaning nozzle to clean the surface of the visual inspection camera and laser scanner.

[0021] 2. When the steel pipe body is placed on the support base, it is supported by the support block. At this time, the buffer spring is used to achieve the purpose of buffer protection at the moment of placement. After that, when the steel pipe body is inspected, it rotates and the friction force drives the friction roller to rotate synchronously. This causes the friction roller to drive the drive gear to rotate. At this time, the driven gear meshing with the drive gear drives the reciprocating screw to rotate. Under the guidance of the guide slider, the reciprocating screw drives the sliding block to move. Finally, the ultrasonic flaw detector above the mounting frame is used to perform flaw detection on the steel pipe body.

[0022] Furthermore, a cleaning sponge is installed on the upper surface of the sliding block to clean the surface of the steel pipe body, ensuring the flaw detection effect. When the steel pipe body is placed above the support block, the support block drives the connecting plate to move downward under the action of gravity. This causes the connecting plate to work with the support base to compress the blower airbag (the blower airbag has a one-way valve structure for air intake on its side). The air in the blower airbag is injected into the storage chamber through the delivery pipe, thereby pushing the piston plate in the storage chamber. Under the compression of the piston plate, the cleaning fluid in the storage chamber is injected into the cleaning sponge, improving the cleaning effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the support frame structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the connection relationship between the fixed disk and the rotating disk of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of the fixed disk of the present invention;

[0027] Figure 5 This is a schematic diagram showing the positional relationship between the sliding block and the connecting plate of the present invention;

[0028] Figure 6 This is a schematic diagram of the support block structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the ultrasonic flaw detector of the present invention;

[0030] Figure 8 This is a schematic diagram of the lower surface structure of the connecting plate of the present invention;

[0031] Figure 9 This is a schematic diagram of the internal structure of the sliding block of the present invention;

[0032] Figure 10 For the present invention Figure 9 Enlarged structural diagram at point A in the middle.

[0033] In the diagram: 1. Support base; 2. Steel pipe body; 3. Mounting plate; 301. Electric slide rail; 4. Support frame; 401. Drive motor; 5. Fixed plate; 6. Rotating plate; 7. Fixed gripper; 8. Visual inspection camera; 9. Laser scanner; 10. Cleaning nozzle; 11. Drying sponge; 12. Collection box; 13. Delivery pump; 14. First connecting pipe; 15. Compression airbag; 16. Grinding plate; 17. Second connecting pipe; 18. Fixed frame; 19. Support block; 20. Friction roller; 21. Buffer spring; 22. Connecting plate; 23. Sliding block; 24. Mounting frame; 25. Ultrasonic flaw detector; 26. Guide slide rod; 27. Reciprocating screw; 28. Driven gear; 29. ​​Drive gear; 30. Cleaning sponge; 31. Storage compartment; 32. Piston plate; 33. Delivery pipe; 34. Blower airbag; 35. One-way valve. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1: Please refer to Figures 1-4To improve detection accuracy, this embodiment provides the following technical solution: A support base 1 is placed horizontally on the ground. The steel pipe body 2 to be inspected is placed above the support base 1. Mounting plates 3 are fixedly installed on the left and right sides of the support base 1. A longitudinally arranged support frame 4 is installed above the mounting plates 3, and the support frame 4 is slidably connected to an electric slide rail 301 fixedly installed on the upper surface of the mounting plates 3. A fixed plate 5 is fixedly installed on the inner surface of the support frame 4, and a rotating plate 6 driven by a drive motor 401 is provided outside the fixed plate 5. A fixing claw 7 is provided inside the rotating plate 6. A cleaning nozzle 10 is fixedly installed on the upper surface of the fixed plate 5, and the cleaning nozzle 10 is connected to the outer surface of the support frame 4. The negative pressure mechanism is connected, and the cleaning nozzle 10 corresponds to the position of the visual inspection camera 8 and laser scanner 9 fixedly installed on the outer surface of the support frame 4. The negative pressure mechanism includes a collection box 12 with a filter structure fixedly installed on the outer surface of the support frame 4. The fixed plate 5 is hollow inside, and a dry sponge 11 is fixedly installed inside the fixed plate 5. A delivery pump 13 is fixedly installed on the upper surface of the collection box 12. The delivery pump 13 is connected to the inside of the fixed plate 5 through a first connecting pipe 14. The fixed plate 5 is connected to the compression airbag 15 through a second connecting pipe 17 at the upper end. The compression airbag 15 is fixedly installed on the outer surface of the support frame 4, and a grinding plate 16 for grinding the end face of the steel pipe body 2 is fixedly installed at the front end of the compression airbag 15.

[0036] When using the device, firstly, the steel pipe body 2 is placed on the support block 19 above the support base 1 using the hoisting device. Then, the electric slide 301 is activated, allowing the support frame 4 to slide on the mounting plate 3. Finally, the rotating disk 6 on the side of the support frame 4 is inserted into the steel pipe body 2. Then, the fixing claw 7 is used to support the inside of the steel pipe body 2 to achieve the purpose of fixation (the fixing claw 7 is a telescopic cylinder that cooperates with the abutment block). Then, the delivery pump 13 is turned on. At this time, the delivery pump 13 injects air into the fixing disk 5 through the first connecting pipe 14 (the fixing disk 5 is equipped with a dry sponge 11 to absorb the moisture in the air). Then, some of the air enters the compression airbag 15 through the second connecting pipe 17. At this time, the compression airbag 15 expands and pushes the grinding plate 16, finally pushing the grinding plate 16 to the steel pipe body. At the end face of the main body 2, some air is ejected from the cleaning nozzle 10 (the exhaust speed of the cleaning nozzle 10 is less than the intake speed of the first connecting pipe 14), thereby cleaning the visual inspection camera 8 and the laser scanner 9 using the cleaning nozzle 10. Then, the drive motor 401 fixedly installed on the support frame 4 is turned on, and the drive motor 401 drives the rotating disk 6 to rotate, thereby causing the rotating disk 6 to drive the main body 2 of the steel pipe to rotate. The grinding plate 16 is used to grind the end face of the main body 2 of the steel pipe. During the grinding process, the position of the collection box 12 is under negative pressure, and the grinding debris is sucked into the collection box 12 for storage. After the grinding is completed, the delivery pump 13 is turned off, and the air bladder 15 is compressed to make the grinding plate 16 detach from the end face of the main body 2 of the steel pipe. Then the main body 2 of the steel pipe continues to rotate, and the visual inspection camera 8 and the laser scanner 9 are used to achieve the purpose of inspection.

[0037] Example 2: Please refer to Figures 5-7 To achieve the purpose of flaw detection on steel pipes, this embodiment provides the following technical solution, specifically: a sliding block 23 is provided above the support base 1, and a mounting bracket 24 is rotatably mounted on the upper rear side of the sliding block 23. An ultrasonic flaw detector 25 is mounted on the upper end of the mounting bracket 24. Two symmetrically mounted fixing brackets 18 are fixedly mounted on the upper surface of the support base 1, and a support block 19 with an inclined upper surface is provided above the fixing brackets 18. A buffer spring 21 is fixedly installed between the support block 19 and the fixing brackets 18. A rotatably mounted component is mounted on the upper surface of the support block 19 to the outer surface of the steel pipe body 2. A friction roller 20 with surface contact friction is provided, and a horizontally arranged connecting plate 22 is fixedly installed between the two left and right support blocks 19. The sliding block 23 is located above the connecting plate 22. A guide slide rod 26 and a reciprocating screw 27 are installed between the two left and right support blocks 19. The guide slide rod 26 is slidably connected to the sliding block 23, and the reciprocating screw 27 is threadedly connected to the sliding block 23. A driven gear 28 for driving its rotation is fixedly installed at the top of the reciprocating screw 27, and the driven gear 28 is meshed with the driving gear 29. The driving gear 29 is fixedly connected to the friction roller 20.

[0038] When the steel pipe body 2 is placed above the support block 19, the support block 19 moves downward under the action of gravity and squeezes the buffer spring 21. The elasticity of the buffer spring 21 is used to achieve the purpose of buffer protection. When the steel pipe body 2 rotates, the friction force drives the friction roller 20 above the support block 19 to rotate. The friction roller 20 drives the reciprocating screw 27 to rotate. At this time, under the guidance of the guide slide rod 26, the sliding block 23 moves left and right above the connecting plate 22. The sliding block 23 drives the mounting frame 24 to move synchronously, so that the ultrasonic flaw detector 25 at the upper end of the mounting frame 24 can perform flaw detection on the steel pipe body 2.

[0039] Example 3: Please refer to Figures 8-10 In order to achieve the purpose of cleaning the surface of the steel pipe and improving the flaw detection effect, this embodiment provides the following technical solution, which specifically discloses: a cleaning sponge 30 for cleaning the outer surface of the steel pipe body 2 is fixedly installed on the upper surface of the lower end of the sliding block 23. A storage chamber 31 is opened inside the sliding block 23, and the storage chamber 31 is connected to the cleaning sponge 30. A piston plate 32 is slidably installed inside the storage chamber 31. The storage chamber 31 is connected to the blower air bag 34 through the delivery pipe 33. The blower air bag 34 is fixedly installed on the lower surface of the connecting plate 22. A one-way valve 35 is provided outside the delivery pipe 33.

[0040] During the movement of the sliding block 23, the cleaning sponge 30 fixedly installed on its upper surface cleans the outer surface of the steel pipe body 2. When the steel pipe body 2 is placed on top, the support block 19 moves downward under the action of gravity, which drives the connecting plate 22 to move downward synchronously. Thus, the connecting plate 22 cooperates with the support base 1 to squeeze the blower airbag 34. At this time, the air in the blower airbag 34 is transported to the storage chamber 31 through the delivery pipe 33 to push the piston plate 32 to move. Under the squeezing action of the piston plate 32, the cleaning liquid in the storage chamber 31 is injected into the cleaning sponge 30, improving the cleaning effect.

[0041] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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 the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic inspection device for the end of a spiral steel pipe, comprising a support base (1), a steel pipe body (2) placed above the support base (1), and mounting plates (3) fixedly installed on the left and right sides of the support base (1), characterized in that, Also includes: A support frame (4) is installed above the mounting plate (3), and the support frame (4) is slidably connected to the electric slide rail (301) on the upper surface of the mounting plate (3). A fixed plate (5) is fixedly installed on the inner surface of the support frame (4), and a rotating plate (6) driven by a drive motor (401) is provided on the outside of the fixed plate (5). A fixed clamp (7) is provided on the inner side of the rotating plate (6). A cleaning nozzle (10) is fixedly installed on the upper surface of the fixed plate (5). The cleaning nozzle (10) is connected to a negative pressure mechanism set on the outer surface of the support frame (4). The cleaning nozzle (10) corresponds to the position of the visual inspection camera (8) and the laser scanner (9) fixedly installed on the outer surface of the support frame (4). A sliding block (23) is provided above the support base (1), and a mounting bracket (24) is rotatably mounted on the sliding block (23). An ultrasonic flaw detector (25) is mounted on the upper end of the mounting bracket (24), and a cleaning sponge (30) is mounted on the lower end of the sliding block (23). The negative pressure mechanism includes a collection box (12) with a filter structure fixedly installed on the outer surface of the support frame (4), and the fixed plate (5) is hollow inside, and a dry sponge (11) is fixedly installed inside the fixed plate (5). A delivery pump (13) is fixedly installed on the upper surface of the collection box (12), and the delivery pump (13) is connected to the inside of the fixed plate (5) through the first connecting pipe (14); The fixed plate (5) is connected to the compression airbag (15) through the second connecting pipe (17) at the upper end, and the compression airbag (15) is fixedly installed on the outer surface of the support frame (4), and a grinding plate (16) for grinding the end face of the steel pipe body (2) is fixedly installed at the front end of the compression airbag (15).

2. The automatic inspection device for the ends of spiral steel pipes according to claim 1, characterized in that: The upper surface of the support base (1) is fixedly installed with two symmetrical fixing frames (18), and a support block (19) with an inclined upper surface is provided above the fixing frame (18), and a buffer spring (21) is fixedly installed between the support block (19) and the fixing frame (18).

3. The automatic inspection device for the ends of spiral steel pipes according to claim 2, characterized in that: The upper surface of the support block (19) is rotatably equipped with a friction roller (20) that contacts and rubs against the outer surface of the steel pipe body (2), and a horizontally arranged connecting plate (22) is fixedly installed between the two support blocks (19). The sliding block (23) is located above the connecting plate (22).

4. The automatic inspection device for the ends of spiral steel pipes according to claim 3, characterized in that: A guide slide rod (26) and a reciprocating screw rod (27) are installed between the two left and right support blocks (19). The guide slide rod (26) is slidably connected to the sliding block (23), and the reciprocating screw rod (27) is threadedly connected to the sliding block (23).

5. The automatic inspection device for the ends of spiral steel pipes according to claim 4, characterized in that: The reciprocating screw (27) is fixedly mounted at its top end with a driven gear (28) for driving its rotation, and the driven gear (28) is meshed with the driving gear (29), and the driving gear (29) is fixedly connected with the friction roller (20).

6. The automatic inspection device for the ends of spiral steel pipes according to claim 1, characterized in that: The sliding block (23) has a storage compartment (31) inside, and the storage compartment (31) is connected to the cleaning sponge (30). A piston plate (32) is slidably installed inside the storage compartment (31).

7. The automatic inspection device for the ends of spiral steel pipes according to claim 6, characterized in that: The storage compartment (31) is connected to the blower airbag (34) through the delivery pipe (33), and the blower airbag (34) is fixedly installed on the lower surface of the connecting plate (22), and a one-way valve (35) is provided on the outside of the delivery pipe (33).

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