Internal flaw detection device for steel pipe

Abstract

The utility model relates to the technical field of flaw detection inside steel pipes, and discloses a flaw detection device for the inside of a steel pipe, which solves the problem of limited flaw detection range caused by the fact that an operator needs to hold an ultrasonic flaw detector by hand to extend into the inside of the steel pipe for flaw detection at present. A circular steel pipe is mounted on the supporting mechanism, and a flaw detection mechanism is arranged in the circular steel pipe; according to the device, through cooperation of the sliding plate, the fixed frame and the first U-shaped round rod, all balls can abut against the inner wall of the round steel pipe conveniently, through cooperation of the third air cylinder, the U-shaped plate and the second U-shaped round rod, the movable block can slide along the third U-shaped round rod conveniently, and through cooperation of the supporting plate and the vertical frame, the movable block can slide along the second U-shaped round rod conveniently. The circular steel pipe is inclined, so that the fixed seat moves under the action of gravity, and the ultrasonic flaw detection heads move in the circular steel pipe to comprehensively detect flaws on the inner wall of the circular steel pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of internal flaw detection of steel pipes, and specifically relates to a device for internal flaw detection of steel pipes. Background Technique

[0002] A steel pipe is a metal material with a hollow cross-section made of steel and a length much greater than the outer diameter. Before the steel pipes leave the factory, steel pipe manufacturers need to use an ultrasonic flaw detector to detect the interior of the steel pipes to ensure the quality of the steel pipes leaving the factory. Flaw detection refers to detecting cracks or defects inside metal materials or components. Flaw detection can promptly detect various defects that occur during the original and processing processes and control them accordingly, preventing raw materials and semi-finished products that do not meet quality requirements from flowing into the next process, avoiding waste of man-hours, manpower, raw materials, and energy caused by futility, and at the same time promoting improvements in design and technology.

[0003] In the prior art, when detecting the inner wall of a circular steel pipe, it is usually necessary for an operator to hold an ultrasonic flaw detector and stretch it into the steel pipe for flaw detection, and the flaw detection range is limited. Content of the Utility Model

[0004] In view of the above situation, to overcome the defects of the prior art, the utility model provides a device for internal flaw detection of steel pipes, which effectively solves the problem that the current flaw detection range is limited because an operator needs to hold an ultrasonic flaw detector and stretch it into the steel pipe for flaw detection.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A device for internal flaw detection of steel pipes, including a base, a support mechanism is arranged on the top of the base, a circular steel pipe is installed on the support mechanism, and a flaw detection mechanism is arranged inside the circular steel pipe;

[0006] The flaw detection mechanism includes a fixed seat and a movable seat located inside the circular steel pipe. A cylinder I is fixedly installed between the fixed seat and the movable seat. A plurality of fixed frames are fixedly connected to the outside of the fixed seat at equal angles. A slide plate is movably sleeved inside the fixed frame. A U-shaped round bar I is arranged outside the fixed frame. Both ends of the U-shaped round bar I are provided with balls that fit the inner wall of the circular steel pipe. The slide plate is fixedly sleeved on the middle part of the outside of the U-shaped round bar I. An installation seat is fixedly installed on the outside of the fixed frame, and an ultrasonic flaw detection head is fixedly installed on the installation seat.

[0007] Preferably, a plurality of limit columns are fixedly connected to the side of the movable seat close to the fixed seat at equal angles. One end of each limit column away from the movable seat is fixedly connected with a limit block, and each limit column passes through the fixed seat and is movably connected with the fixed seat.

[0008] Preferably, a sliding groove is provided on the fixed frame, a slider is slidably connected in the sliding groove, the slider is fixed to the outside of the sliding plate, one side of the slider away from the sliding plate is rotatably connected with a movable rod, and one end of the movable rod away from the slider is rotatably connected with a movable seat.

[0009] Preferably, the supporting mechanism includes a vertical frame fixed to the top of the base, a supporting plate is rotatably connected in the vertical frame, a second rubber pad is fixedly installed on the top of the supporting plate, and the circular steel pipe is installed on the second rubber pad.

[0010] Preferably, a third U-shaped round rod is fixedly installed at the bottom of the supporting plate, a movable block is movably sleeved on the outside of the third U-shaped round rod, a contact roller abutting against the supporting plate is provided at the top of the movable block, a second U-shaped round rod is fixedly installed at the top of the base, a U-shaped plate is movably sleeved on the outside of the second U-shaped round rod, a third cylinder is fixedly installed between the U-shaped plate and the base, and the top of the U-shaped plate is rotatably connected to the bottom of the movable block.

[0011] Preferably, two L-shaped round rods are symmetrically and fixedly connected to the outside of the supporting plate, a connecting plate is fixedly connected between the ends of the two L-shaped round rods away from the supporting plate, the outside of the two L-shaped round rods is movably sleeved with the same pressing plate, a second cylinder is fixedly installed between the pressing plate and the connecting plate, and two first rubber pads both abutting against the circular steel pipe are symmetrically and fixedly installed on the side of the pressing plate away from the connecting plate.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] (1) In the present utility model, through the cooperation between the first cylinder, the movable seat and the movable rod, it is convenient for each slider to slide in each sliding groove respectively, and through the cooperation between the sliding plate, the fixed frame and the first U-shaped round rod, it is convenient for each ball to abut against the inner wall of the circular steel pipe, and through the cooperation between the third cylinder, the U-shaped plate and the second U-shaped round rod, it is convenient for the movable block to slide along the third U-shaped round rod, and through the cooperation between the supporting plate and the vertical frame, it is convenient for the circular steel pipe to tilt so that the fixed seat moves under the action of gravity, thereby facilitating each ultrasonic flaw detector to move inside the circular steel pipe to perform a comprehensive flaw detection on the inner wall of the circular steel pipe;

[0014] (2) In this new type, through the cooperation between the second cylinder, the pressing plate and the L-shaped round rod, it is convenient for the two first rubber pads to move and closely fit with the circular steel pipe placed on the second rubber pad, thereby facilitating the fixation of the circular steel pipe to prevent it from moving during the flaw detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model.

[0016] In the drawings:

[0017] Figure 1 This is a schematic structural diagram of the internal flaw detection device for steel pipes of the present utility model;

[0018] Figure 2 This is a schematic structural diagram of the flaw detection mechanism of the present utility model;

[0019] Figure 3 This is a schematic structural diagram of the support mechanism of the present utility model;

[0020] Figure 4 This is a schematic structural diagram of the U-shaped plate of the present utility model.

[0021] In the figure: 1, base; 2, flaw detection mechanism; 201, fixed seat; 202, first U-shaped round rod; 203, ball; 204, ultrasonic flaw detector; 205, mounting seat; 206, sliding plate; 207, limit post; 208, limit block; 209, fixed frame; 2010, chute; 2011, slider; 2012, movable rod; 2013, first cylinder; 2014, movable seat; 3, support mechanism; 301, vertical frame; 302, U-shaped plate; 303, support plate; 304, first rubber pad; 305, second rubber pad; 306, pressing plate; 307, L-shaped round rod; 308, connecting plate; 309, second cylinder; 3010, third cylinder; 3011, second U-shaped round rod; 3012, third U-shaped round rod; 3013, abutting roller; 3014, movable block; 4, circular steel pipe. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment 1 is given by Figure 1 The present utility model includes a base 1. A support mechanism 3 is provided on the top of the base 1. A circular steel pipe 4 is installed on the support mechanism 3. A flaw detection mechanism 2 is provided inside the circular steel pipe 4.

[0024] Specifically, it is given by Figures 2-4Given that the flaw detection mechanism 2 includes a fixed seat 201 and a movable seat 2014 located inside the circular steel pipe 4. A first cylinder 2013 is fixedly installed between the fixed seat 201 and the movable seat 2014. A plurality of fixed frames 209 are fixedly connected to the outside of the fixed seat 201 at equal angles. A slide plate 206 is movably sleeved inside the fixed frame 209. A first U-shaped round rod 202 is provided outside the fixed frame 209. Ball bearings 203 that fit against the inner wall of the circular steel pipe 4 are provided at both ends of the first U-shaped round rod 202. The slide plate 206 is fixedly sleeved on the middle part of the outside of the first U-shaped round rod 202. An installation seat 205 is fixedly installed outside the fixed frame 209. An ultrasonic flaw detector 204 is fixedly installed on the installation seat 205. A plurality of limit columns 207 are fixedly connected to one side of the movable seat 2014 close to the fixed seat 201 at equal angles. A limit block 208 is fixedly connected to the end of each limit column 207 away from the movable seat 2014. And each limit column 207 passes through the fixed seat 201 and is movably connected to the fixed seat 201. By providing the limit columns 207 to limit the movable seat 2014, the stability of the movable seat 2014 during movement is ensured. A chute 2010 is provided on the fixed frame 209. A slider 2011 is slidably connected inside the chute 2010. The slider 2011 is fixed to the outside of the slide plate 206. A movable rod 2012 is rotatably connected to the side of the slider 2011 away from the slide plate 206. The end of the movable rod 2012 away from the slider 2011 is rotatably connected to the movable seat 2014. The support mechanism 3 includes a vertical frame 301 fixed to the top of the base 1. A support plate 303 is rotatably connected inside the vertical frame 301. A support shaft is rotatably connected inside the vertical frame 301. The support plate 303 is fixedly sleeved on the outside of the support shaft. A second rubber pad 305 is fixedly installed on the top of the support plate 303. The circular steel pipe 4 is installed on the second rubber pad 305. A third U-shaped round rod 3012 is fixedly installed at the bottom of the support plate 303. A movable block 3014 is movably sleeved on the outside of the third U-shaped round rod 3012. A contact roller 3013 that abuts against the support plate 303 is provided on the top of the movable block 3014. When the movable block 3014 slides on the outside of the third U-shaped round rod 3012, it drives the contact roller 3013 to roll on the support plate 303, ensuring the stability of the movable block 3014 during sliding. A second U-shaped round rod 3011 is fixedly installed on the top of the base 1. A U-shaped plate 302 is movably sleeved on the outside of the second U-shaped round rod 3011. A third cylinder 3010 is fixedly installed between the U-shaped plate 302 and the base 1. The top of the U-shaped plate 302 is rotatably connected to the bottom of the movable block 3014;

[0025] First, place the fixed seat 201 and the movable seat 2014 inside the circular steel pipe 4. Then, start the first cylinder 2013 to drive the movable seat 2014 to move. Drive the slider 2011 to slide in the chute 2010 through the movable rod 2012, and drive the sliding plate 206 to slide along the fixed frame 209. At the same time, the first U-shaped round rod 202 moves until each ball 203 abuts against the inner wall of the circular steel pipe 4. Then, start the third cylinder 3010 to drive the U-shaped plate 302 to slide along the second U-shaped round rod 3011, and drive the movable block 3014 to slide along the third U-shaped round rod 3012. At the same time, the circular steel pipe 4 tilts. At this time, the fixed seat 201 moves inside the circular steel pipe 4 under the action of gravity. At the same time, each ultrasonic flaw detector 204 detects the inside of the circular steel pipe 4 during the movement. Finally, the comprehensive flaw detection of the inner wall of the circular steel pipe 4 is completed.

[0026] Specifically, it is given by Figure 3 On the outer side of the support plate 303, two L-shaped round rods 307 are symmetrically and fixedly connected. A connecting plate 308 is fixedly connected between the ends of the two L-shaped round rods 307 away from the support plate 303. The same pressure plate 306 is movably sleeved on the outer sides of the two L-shaped round rods 307. A second cylinder 309 is fixedly installed between the pressure plate 306 and the connecting plate 308. On the side of the pressure plate 306 away from the connecting plate 308, two rubber pads 304 that are both in contact with the circular steel pipe 4 are symmetrically and fixedly installed.

[0027] In the use state, first place the circular steel pipe 4 on the rubber pad 305. Then, start the second cylinder 309 to drive the pressure plate 306 to slide along the two L-shaped round rods 307, and drive the two rubber pads 304 to move until they are in close contact with the circular steel pipe 4. Finally, fix the circular steel pipe 4 on the support plate 303 to prevent the circular steel pipe 4 from moving when detecting the inside of the circular steel pipe 4.

Claims

1. An internal flaw detection device for steel pipes, comprising a base (1), characterized in that: A support mechanism (3) is provided at the top of the base (1), a circular steel pipe (4) is installed on the support mechanism (3), and a flaw detection mechanism (2) is provided inside the circular steel pipe (4). The flaw detection mechanism (2) includes a fixed seat (201) and a movable seat (2014) located inside the circular steel pipe (4). A first cylinder (2013) is fixedly installed between the fixed seat (201) and the movable seat (2014). A plurality of fixed frames (209) are fixedly connected to the outside of the fixed seat (201) at equal angles. A sliding plate (206) is movably sleeved inside the fixed frame (209). A first U-shaped round rod (202) is provided outside the fixed frame (209). Ball bearings (203) that fit against the inner wall of the circular steel pipe (4) are provided at both ends of the first U-shaped round rod (202). The sliding plate (206) is fixedly sleeved on the middle part of the outside of the first U-shaped round rod (202). A mounting seat (205) is fixedly installed on the outside of the fixed frame (209), and an ultrasonic flaw detector (204) is fixedly installed on the mounting seat (205).

2. The internal flaw detection device for steel pipes according to claim 1, characterized in that: A plurality of limit posts (207) are fixedly connected to the side of the movable seat (2014) close to the fixed seat (201) at equal angles. A limit block (208) is fixedly connected to the end of each limit post (207) away from the movable seat (2014), and each limit post (207) passes through the fixed seat (201) and is movably connected to the fixed seat (201).

3. The internal flaw detection device for steel pipes according to claim 1, characterized in that: A chute (2010) is provided on the fixed frame (209). A slider (2011) is slidably connected inside the chute (2010). The slider (2011) is fixed to the outside of the sliding plate (206). A movable rod (2012) is rotatably connected to the side of the slider (2011) away from the sliding plate (206). The end of the movable rod (2012) away from the slider (2011) is rotatably connected to the movable seat (2014).

4. A steel pipe internal flaw detection device according to claim 1, characterized in that: The support mechanism (3) includes a vertical frame (301) fixed to the top of the base (1). A support plate (303) is rotatably connected inside the vertical frame (301). A second rubber pad (305) is fixedly installed on the top of the support plate (303). The circular steel pipe (4) is installed on the second rubber pad (305).

5. The internal flaw detection device for steel pipes according to claim 4, characterized in that: A third U-shaped round rod (3012) is fixedly installed at the bottom of the support plate (303). A movable block (3014) is movably sleeved on the outside of the third U-shaped round rod (3012). A contact roller (3013) that abuts against the support plate (303) is provided on the top of the movable block (3014). A second U-shaped round rod (3011) is fixedly installed on the top of the base (1). A U-shaped plate (302) is movably sleeved on the outside of the second U-shaped round rod (3011). A third cylinder (3010) is fixedly installed between the U-shaped plate (302) and the base (1). The top of the U-shaped plate (302) is rotatably connected to the bottom of the movable block (3014).

6. The internal flaw detection device for steel pipes according to claim 4, wherein: On the outer side of the support plate (303), two L-shaped round rods (307) are symmetrically and fixedly connected. A connecting plate (308) is fixedly connected between the ends of the two L-shaped round rods (307) away from the support plate (303). The outer sides of the two L-shaped round rods (307) are movably sleeved with the same pressing plate (306). A second cylinder (309) is fixedly installed between the pressing plate (306) and the connecting plate (308). On the side of the pressing plate (306) away from the connecting plate (308), two rubber pads one (304) are symmetrically and fixedly installed, and both are in contact with the circular steel pipe (4).

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