Weld joint rapid detection device and detection method

Abstract

The invention relates to the technical field of welding seam detection, in particular to a rapid welding seam detection device and method, an X-shaped folding frame is arranged above a steel pipe body, and insertion rods are movably inserted into the two ends of a rotating roller; a longitudinal wave generator and a receiver are arranged on the two sides of the steel pipe body respectively and installed between the two shaft rods located on the same side of the steel pipe body. The four positioning clamping plates are movably installed on the outer sides of the four shaft rods correspondingly. The beneficial effects are that the four ends of the X-shaped folding frame are fixedly provided with the shaft rods, the outer sides of the middle parts of the shaft rods are movably provided with the connecting frames, the connecting frames are clamped at the outer side of the steel pipe body, and the connecting frames at the two sides of the steel pipe body are mutually symmetrical; therefore, whether the weld joint has defects or not can be identified according to the amplitude of the longitudinal waves on the controller, and the difficulty of weld joint defect identification is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of weld detection, and in particular to a weld rapid detection device and a detection method. Background Art

[0002] Straight seam steel pipe welding is the process of straight seam welding of pipes made of hot-rolled or cold-rolled steel plates or steel strips through welding equipment. The weld needs to be inspected after welding.

[0003] In the prior art, a Chinese invention with publication number CN105301107A discloses a weld inspection tool for a steel pipe, wherein the steel pipe is positioned by the tool, and then the weld inspection is performed with the aid of an ultrasonic detector.

[0004] However, at present, for smaller welds on steel pipes, the echo signal of ultrasonic reflection waves is small, and the deformation waves are easily mixed with the reflection waves, resulting in more interference signal waves on the instrument screen, which seriously affects the identification and judgment of internal defects of the welds, thus making weld detection difficult. To this end, the present invention proposes a weld rapid detection device and detection method to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a weld rapid detection device and method to solve the problem proposed in the above background technology that ultrasonic reflected waves and deformation waves are mixed with each other and it is difficult to identify weld defects.

[0006] To achieve the above object, the present invention provides the following technical solution: a weld rapid detection device, comprising a steel pipe body, an X-shaped folding frame is arranged above the steel pipe body, two rollers are arranged on the X-shaped folding frame, and the two rollers are respectively pressed on the two ends of the surface of the steel pipe body, both ends of the rollers are movably plugged with a plug rod, and one end of the plug rod is rotatably installed below the end of the X-shaped folding frame;

[0007] The four ends of the X-shaped folding frame are all fixed with shafts, and the four shafts are perpendicular to the plane where the X-shaped folding frame is located. The two sides of the steel pipe body are respectively provided with a longitudinal wave generator and a receiver, and the longitudinal wave generator and the receiver are both installed between the two shafts located on the same side of the steel pipe body;

[0008] The positioning clamps are provided in four numbers and are movably mounted on the outsides of the four shafts respectively. The positioning clamps are arranged in a "<" shape and are symmetrically distributed on both sides of the steel pipe body.

[0009] Preferably, a sleeve is provided on the outer movable sleeve of the shaft rod, and a storage plate is provided between the two sleeves located on the same side of the steel pipe body, telescopic rods are movably inserted on both sides of the storage plate, and the two telescopic rods are respectively fixedly connected to the two sleeves, and an installation sleeve is fixedly provided through the middle of the storage plate, and the longitudinal wave generator and the receiver are respectively movably installed in the inner cavities of the two installation sleeves.

[0010] Preferably, two symmetrically distributed convex plates are fixedly provided on the outer side of the positioning clamping plate, the two convex plates are respectively located at the two ends of the sleeve, and the convex plates are movably sleeved on the outer side of the shaft rod, and an anti-slip plate is fixedly provided on the lower end of the shaft rod.

[0011] Preferably, two groups of symmetrically distributed rolling shafts are rotatably mounted on the inner side wall of the positioning clamping plate, and the rolling shafts are perpendicular to the axis of the steel pipe body and tangent to the surface of the steel pipe body.

[0012] Preferably, a connecting frame is provided between the two corresponding positioning card plates, a weight-reducing groove is penetrated through the surface of the connecting frame, and telescopic frames are movably connected to both ends of the connecting frame. The telescopic frame is in an "L" shape, and one end of the telescopic frame is fixed to the surface of the positioning card plate.

[0013] Preferably, a pin is provided at the intersection in the middle of the X-shaped folding frame, a controller is fixedly mounted on the upper end of the pin, and the longitudinal wave generator and the receiver are both electrically connected to the controller via a wire.

[0014] Preferably, an annular groove is provided on the surface of the rotating roller, the annular groove is arc-shaped and fits with the surface of the steel pipe body, and a rubber pad is bonded to the inner wall of the annular groove.

[0015] Preferably, both ends of the roller are provided with slots, and the other end of the insertion rod is fixedly provided with a boss, which is slidably installed in the inner cavity of the slot and fixedly connected to the other end of the insertion rod. The inner cavity of the slot is provided with a tensioning tongue, and the two ends of the tensioning tongue are respectively fixedly connected to the inner wall of the slot and the boss.

[0016] Preferably, a connecting block is fixedly provided at one end of the insertion rod, a suspension shaft is fixedly connected to the middle of the connecting block, the suspension shaft is T-shaped, and the upper end of the suspension shaft is movably connected to the X-shaped folding frame.

[0017] A detection method using the above-mentioned weld rapid detection device specifically comprises the following steps:

[0018] Step 1: Pull the X-shaped folding frame to unfold it. The positioning card plate is located at the lower end of the shaft under the action of gravity. The X-shaped folding frame is placed on the outside of the steel pipe body from top to bottom until the positioning card plate is flush with the X-shaped folding frame.

[0019] Step 2: Release the pull of the X-shaped folding frame, and the tension provided by the tightening conversation makes the X-shaped folding frame fold. At this time, the shaft moves accordingly, and the positioning card is clamped on the outside of the steel pipe body until the four positioning card plates are symmetrically clamped on both sides of the two ends of the steel pipe body. At this time, the longitudinal wave generator and the receiver are respectively located on both sides of the steel pipe body, and the connecting line between the two coincides with the diameter of the steel pipe body;

[0020] Step 3: Release the X-shaped folding frame, and the X-shaped folding frame moves downward under the action of gravity. The roller presses down on the surface of the steel pipe body, and then the longitudinal wave generator and the receiver are started through the controller. The longitudinal wave generator emits longitudinal waves, which propagate from the upper and lower parts of the steel pipe body and interfere with each other at the receiver. The receiver receives the interfered longitudinal waves, and the staff identifies the weld defects on the surface of the steel pipe body by the longitudinal wave amplitude displayed on the controller;

[0021] Step 4: Move the X-shaped folding frame along the length direction of the steel pipe body and repeat step 3 to detect the welds at different positions along the length direction of the steel pipe body using the longitudinal wave generator and the receiver.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention has shaft rods fixedly arranged at the four ends of the X-shaped folding frame, a connecting frame movably installed on the outer side of the middle of the shaft rod, the connecting frame is clamped on the outer side of the steel pipe body, and the connecting frames on both sides of the steel pipe body are symmetrical to each other, a telescopic rod is arranged between the two connecting frames on the same side of the steel pipe body, a longitudinal wave generator and a receiver are respectively fixed at the middle parts of the two telescopic rods, after the device is clamped on the outer side of the steel pipe body, the longitudinal wave generator and the receiver are just located at the two ends of the diameter of the steel pipe body, the longitudinal wave generator emits longitudinal waves divided into two groups, which are respectively propagated on the upper and lower sides of the steel pipe body, and after being received by the receiver, if there is a defect in the weld, the two groups of longitudinal waves cancel each other out, and if there is no defect in the weld, the two groups of longitudinal waves are superimposed on each other, so that it is possible to identify whether there is a defect in the weld according to the amplitude of the longitudinal wave on the controller, thereby reducing the difficulty of identifying weld defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a side view schematic diagram of the overall structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the connection between the positioning card plate and the connecting frame structure of the present invention;

[0027] Figure 4 It is an exploded schematic diagram of the telescopic rod and the positioning card plate structure of the present invention;

[0028] Figure 5It is a three-dimensional schematic diagram of the X-shaped folding frame structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the internal structure of the roller of the present invention;

[0030] Figure 7 It is a schematic diagram of the propagation path of the longitudinal wave inside the steel pipe body of the present invention.

[0031] In the figure: 1. Steel pipe body; 2. X-shaped folding frame; 21. Roller; 22. Annular groove; 23. Slot; 24. Insert rod; 25. Boss; 26. Tension spring; 27. Connecting block; 28. Suspension shaft; 3. Shaft; 31. Anti-slip plate; 4. Telescopic rod; 41. Sleeve; 42. Storage plate; 43. Mounting sleeve; 5. Longitudinal wave generator; 6. Receiver; 7. Connecting frame; 71. Weight reduction groove; 8. Telescopic frame; 9. Positioning card plate; 91. Boss plate; 92. Rolling shaft; 10. Controller. DETAILED DESCRIPTION

[0032] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 7 , the present invention provides a technical solution:

[0034] Embodiment 1, a weld rapid detection device, includes a steel pipe body 1 and a positioning clamping plate 9.

[0035] Specifically, an X-shaped folding frame 2 is arranged above the steel pipe body 1. The X-shaped folding frame 2 can be folded or unfolded around its middle part. The X-shaped folding frame 2 itself is a symmetrical structure in the X-axis and Y-axis directions. Two rollers 21 are arranged on the X-shaped folding frame 2, and the two rollers 21 are respectively pressed on the two ends of the surface of the steel pipe body 1. Both ends of the rollers 21 are movably plugged with plug rods 24, and one end of the plug rod 24 is rotatably installed under the end of the X-shaped folding frame 2. The rollers 21 can roll on the surface of the steel pipe body 1, thereby reducing the friction force when the X-shaped folding frame 2 moves along the length direction of the steel pipe body 1. Since the plug rod 24 can be extended and retracted at the end of the roller 21, the X-shaped folding frame 2 will not be hindered by the rollers 21 when folding or unfolding;

[0036] Secondly, the four ends of the X-shaped folding frame 2 are all fixed with shafts 3, and the four shafts 3 are all perpendicular to the plane where the X-shaped folding frame 2 is located. Figure 1As shown, when the X-shaped folding frame 2 is horizontally placed on the upper side of the steel pipe body 1, the shaft 3 can just remain vertical. Of course, according to actual use, the X-shaped folding frame 2 can also be placed at an angle. However, no matter where the X-shaped folding frame 2 is located, the shaft 3 can always remain tangent to the surface of the steel pipe body 1. A longitudinal wave generator 5 and a receiver 6 are respectively arranged on both sides of the steel pipe body 1. The longitudinal wave generator 5 and the receiver 6 are both installed between the two shafts 3 located on the same side of the steel pipe body 1, as shown in FIG. Figure 1 and Figure 2 As shown, when the X-shaped folding frame 2 is folded and clamped to the steel pipe body 1, the longitudinal wave generator 5 and the receiver 6 can be located at the two ends of the diameter of the circle where the steel pipe body 1 is located. That is to say, the connection line between the longitudinal wave generator 5 and the receiver 6 can just divide the steel pipe body 1 into two symmetrical halves. Figure 7 As shown, when the longitudinal wave generator 5 emits longitudinal waves, the longitudinal waves are divided into two groups and propagate from the upper and lower sides of the steel pipe body 1 respectively, and the amplitude, frequency, wavelength and period of the two groups of longitudinal waves are consistent. ① When the surface of the steel pipe body 1 is completely welded and there is no weld, the longitudinal waves propagate in the same medium, and the propagation path length is consistent. The properties of the two groups of longitudinal waves remain unchanged. After the receiver 6 receives the wave signal, the two groups of longitudinal waves are superimposed on each other to form another group of new longitudinal waves with the same frequency but doubled amplitude; ② When the surface of the steel pipe body 1 is not completely welded and has a weld, when the longitudinal wave passes through the weld, the propagation medium changes, and the properties of one group of longitudinal waves change. After the receiver 6 receives the wave signal, the two groups of longitudinal waves are superimposed to form an irregular new wave, and its amplitude cannot be stabilized as two parts of the original wave. Therefore, the staff can quickly determine whether there is a weld on the surface of the steel pipe body 1 by observing the signal received by the receiver 6 through the controller 10. If there is a weld, it can also be determined that the weld is located in the same plane as the longitudinal wave generator 5 and the receiver 6;

[0037] Furthermore, four positioning clamps 9 are provided and are movably installed on the outsides of the four shafts 3 respectively. The positioning clamps 9 are arranged in a “<” shape and are symmetrically distributed on both sides of the steel pipe body 1 .

[0038] In order to ensure that the longitudinal wave generator 5 and the receiver 6 fit the surface of the steel pipe body 1, the present application also has a sleeve 41 movably sleeved on the outer side of the shaft 3, and the sleeve 41 and the shaft 3 can rotate relative to each other. A storage plate 42 is provided between the two sleeves 41 located on the same side of the steel pipe body 1, and telescopic rods 4 are movably inserted on both sides of the storage plate 42, and the two telescopic rods 4 are fixedly connected to the two sleeves 41 respectively. Figure 4As shown, the telescopic rod 4 can slide a certain distance along its own length direction, so as not to hinder the folding or unfolding of the X-shaped folding frame 2. A mounting sleeve 43 is fixedly provided in the middle of the storage plate 42, and the longitudinal wave generator 5 and the receiver 6 are movably installed in the inner cavities of the two mounting sleeves 43 respectively. The longitudinal wave generator 5 and the receiver 6 can slide in the inner cavities of the mounting sleeves 43 at the corresponding positions, so as to ensure that the longitudinal wave generator 5 and the receiver 6 can be closely attached to the surface of the steel pipe body 1, combined with Figure 1 As shown, when the X-shaped folding frame 2 is folded or unfolded and drives the shaft rod 3 to move therewith, the shaft rod 3 can rotate in the inner cavity of the sleeve 41. Since the moving path of the shaft rod 3 is an arc, the shaft rod 3 can drive the telescopic rod 4 and the storage plate 42 to approach the steel pipe body 1 when it moves, thereby making the longitudinal wave generator 5 and the receiver 6 close to the surface of the steel pipe body 1, ensuring that the waves emitted by the longitudinal wave generator 5 can propagate on the surface of the steel pipe body 1 and be received by the receiver 6.

[0039] In order to position the sleeve 41, the present application also has two symmetrically distributed protruding plates 91 fixedly arranged on the outer side of the positioning card plate 9, the two protruding plates 91 are respectively located at the two ends of the sleeve 41, and the protruding plates 91 are movably sleeved on the outer side of the shaft rod 3, such as Figure 4 As shown, the sleeve 41 is always located between the two convex plates 91. Since the four shafts 3 are parallel to each other, after the positioning clamps 9 clamp the steel pipe body 1, the two positioning clamps 9 at opposite positions can be located at the two ends of the diameter of the circle where the steel pipe body 1 is located. At this time, after the sleeve 41 is positioned by the convex plates 91, it can be ensured that the longitudinal wave generator 5 and the receiver 6 are respectively located at the two ends of the diameter of the circle where the steel pipe body 1 is located. In other words, the connection line between the longitudinal wave generator 5 and the receiver 6 just divides the steel pipe body 1 into two symmetrical halves (excluding the weld). When the longitudinal wave generator 5 emits a longitudinal wave, no matter whether the longitudinal wave propagates from the upper half of the steel pipe body 1 or the lower half of the steel pipe body 1, the path length of the longitudinal wave when it reaches the receiver 6 remains consistent, and no phase difference will be generated. In addition, an anti-slip plate 31 is fixedly provided at the lower end of the shaft 3. Figure 4 and Figure 1 As shown, the shaft rod 3 is arranged to prevent the positioning clamping plate 9 from being separated from the shaft rod 3 .

[0040] In order to reduce the friction generated between the positioning card plate 9 and the steel pipe body 1 when it moves, the present application also has two groups of symmetrically distributed rolling shafts 92 rotatably installed on the inner side wall of the positioning card plate 9, and the rolling shafts 92 are perpendicular to the axis of the steel pipe body 1 and tangent to the surface of the steel pipe body 1. After the longitudinal wave generator 5 and the receiver 6 complete the detection of a weld of the steel pipe body 1, the X-shaped folding frame 2 can be moved along the length direction of the steel pipe body 1 to change the device to detect welds at different positions. The setting of the rolling shafts 92 can reduce the friction generated when the positioning card plate 9 slides on the surface of the steel pipe body 1, thereby ensuring that the device moves more smoothly in the length direction of the steel pipe body 1.

[0041] In order to prevent the positioning card plate 9 from rotating and causing the surface of the steel pipe body 1 to be unable to be clamped, the present application also has a connecting frame 7 arranged between the two corresponding positioning card plates 9, and a weight reduction groove 71 is opened on the surface of the connecting frame 7 to reduce the dead weight of the connecting frame 7. Both ends of the connecting frame 7 are movably connected with a telescopic frame 8, and the telescopic frame 8 is "L"-shaped, and one end of the telescopic frame 8 is fixed to the surface of the positioning card plate 9, such as Figure 3 As shown, the telescopic frame 8 and the connecting frame 7 can slide relative to each other, thereby changing the distance between the two positioning clamps 9. The connecting frame 7 and the telescopic frame 8 can cooperate to position the angle direction of the positioning clamp 9, thereby preventing the positioning clamp 9 from rotating on the outside of the shaft 3 and causing the direction to change. Therefore, when the X-shaped folding frame 2 of the device is folded and clamped to the steel pipe body 1, the positioning clamp 9 can just clamp the inner side to the surface of the steel pipe body 1.

[0042] In order to facilitate real-time observation by the staff, the present application also has a pin shaft arranged at the intersection in the middle of the X-shaped folding frame 2 so that the X-shaped folding frame 2 itself can be folded or unfolded, and a controller 10 is fixedly installed at the upper end of the pin shaft. The longitudinal wave generator 5 and the receiver 6 are both electrically connected to the controller 10 through wires. The controller 10 is configured to control the longitudinal wave generator 5 to emit longitudinal waves, and receive and process the wave signals transmitted by the receiver 6, and finally display them on the display screen for real-time observation by the staff.

[0043] In order to prevent the device from rotating around the steel pipe body 1 outside the steel pipe body 1, the present application also has an annular groove 22 on the surface of the roller 21, the annular groove 22 is arc-shaped and fits the surface of the steel pipe body 1, and a rubber pad is bonded to the inner wall of the annular groove 22, such as Figure 6 As shown, the provision of the annular groove 22 can increase the contact area and friction between the roller 21 and the steel pipe body 1, thereby minimizing the possibility of the device rotating around the steel pipe body 1, ensuring that the device is more stable on the outside of the steel pipe body 1.

[0044] In order to automatically clamp the steel pipe body 1 by the device, the present application also has slots 23 at both ends of the roller 21, and a boss 25 is fixedly provided at the other end of the insertion rod 24. The boss 25 is slidably installed in the inner cavity of the slot 23 and fixedly connected to the other end of the insertion rod 24. Figure 6 As shown, the boss 25 is provided to prevent the insertion rod 24 from being completely separated from the roller 21. In addition, it should be noted that the telescopic frame 8 and the connecting frame 7 of the device, as well as the telescopic rod 4 and the storage plate 42 are all movably connected with each other in the same structure, which will not be elaborated here. A tensioning conversation 26 is provided in the inner cavity of the slot 23, and the two ends of the tensioning conversation 26 are respectively fixedly connected to the inner wall of the slot 23 and the boss 25. The tensioning conversation 26 is provided to tighten the insertion rod 24 so that the X-shaped folding frame 2 always has a tendency to fold, so that the device can be automatically clamped to the steel pipe body 1, and because the tension of the tensioning conversation 26 at both ends of the roller 21 is the same, the annular groove 22 can be located in the middle position between the two insertion rods 24, so as to fit the surface of the steel pipe body 1.

[0045] In order to connect the insertion rod 24 with the X-shaped folding frame 2, the present application also has a connection block 27 fixedly provided at one end of the insertion rod 24, and a suspension shaft 28 is fixedly connected to the middle of the connection block 27. The suspension shaft 28 is "T"-shaped, and the upper end of the suspension shaft 28 is movably connected to the X-shaped folding frame 2. Figure 6 and Figure 5 As shown, the insertion rod 24 can rotate around the suspension shaft 28, so that the X-shaped folding frame 2 drives the insertion rod 24 to rotate during the folding or unfolding process, so that the annular groove 22 can always be perpendicular to the axis of the steel pipe body 1 to facilitate rolling on the steel pipe body 1.

[0046] The present invention also discloses a detection method using the above-mentioned weld rapid detection device, which specifically comprises the following steps:

[0047] Step 1: Pull the X-shaped folding frame 2 to unfold it. The positioning card plate 9 is located at the lower end of the shaft rod 3 under the action of gravity. The X-shaped folding frame 2 is placed on the outer side of the steel pipe body 1 from top to bottom until the positioning card plate 9 is flush with the X-shaped folding frame 2.

[0048] Step 2, release the pull on the X-shaped folding frame 2, and the tension provided by the tensioning talk 26 makes the X-shaped folding frame 2 fold. At this time, the shaft 3 moves accordingly, and the positioning card plate 9 is clamped on the outside of the steel pipe body 1, until the four positioning card plates 9 are symmetrically clamped on both sides of the two ends of the steel pipe body 1. At this time, the longitudinal wave generator 5 and the receiver 6 are respectively located on both sides of the steel pipe body 1, and the connecting line between the two coincides with the diameter of the steel pipe body 1;

[0049] Step 3, release the X-shaped folding frame 2, the X-shaped folding frame 2 moves downward under the action of gravity, the roller 21 presses down on the surface of the steel pipe body 1, and then the longitudinal wave generator 5 and the receiver 6 are started through the controller 10, the longitudinal wave generator 5 emits longitudinal waves, the longitudinal waves propagate from the upper and lower parts of the steel pipe body 1, and interfere with each other at the receiver 6, and the receiver 6 receives the interfered longitudinal waves, and the staff identifies the weld defects on the surface of the steel pipe body 1 by the longitudinal wave amplitude displayed on the controller 10;

[0050] Step 4: Move the X-shaped folding frame 2 along the length direction of the steel pipe body 1 and repeat step 3 to detect the welds at different positions along the length direction of the steel pipe body 1 by using the longitudinal wave generator 5 and the receiver 6.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A weld rapid detection device, comprising a steel pipe body (1), characterized in that: An X-shaped folding frame (2) is arranged above the steel pipe body (1), and two rollers (21) are arranged on the X-shaped folding frame (2), and the two rollers (21) are respectively pressed on the two ends of the surface of the steel pipe body (1), and the two ends of the rollers (21) are movably plugged with insertion rods (24), and one end of the insertion rod (24) is rotatably installed below the end of the X-shaped folding frame (2); The four ends of the X-shaped folding frame (2) are all fixed with shafts (3), and the four shafts (3) are all perpendicular to the plane where the X-shaped folding frame (2) is located. The two sides of the steel pipe body (1) are respectively provided with a longitudinal wave generator (5) and a receiver (6), and the longitudinal wave generator (5) and the receiver (6) are both installed between two shafts (3) located on the same side of the steel pipe body (1); The positioning clamps (9) are provided in four numbers and are movably mounted on the outsides of the four shafts (3) respectively. The positioning clamps (9) are arranged in a "<" shape and are symmetrically distributed on both sides of the steel pipe body (1).

2. A weld rapid detection device according to claim 1, characterized in that: The outer movable sleeve of the shaft rod (3) is provided with a sleeve (41), and a storage plate (42) is provided between the two sleeves (41) located on the same side of the steel pipe body (1). Telescopic rods (4) are movably inserted on both sides of the storage plate (42), and the two telescopic rods (4) are respectively fixedly connected to the two sleeves (41). A mounting sleeve (43) is fixedly provided through the middle of the storage plate (42), and the longitudinal wave generator (5) and the receiver (6) are respectively movably installed in the inner cavities of the two mounting sleeves (43).

3. A weld rapid detection device according to claim 2, characterized in that: Two symmetrically distributed protruding plates (91) are fixedly provided on the outer side of the positioning clamping plate (9), the two protruding plates (91) are respectively located at the two ends of the sleeve (41), and the protruding plates (91) are movably sleeved on the outer side of the shaft rod (3), and an anti-slip plate (31) is fixedly provided on the lower end of the shaft rod (3).

4. A weld rapid detection device according to claim 3, characterized in that: Two groups of symmetrically distributed rolling shafts (92) are rotatably mounted on the inner side wall of the positioning clamping plate (9); the rolling shafts (92) are perpendicular to the axis of the steel pipe body (1) and tangent to the surface of the steel pipe body (1).

5. A weld rapid detection device according to claim 4, characterized in that: A connecting frame (7) is arranged between the two corresponding positioning card plates (9), a weight-reducing groove (71) is provided through the surface of the connecting frame (7), and telescopic frames (8) are movably inserted at both ends of the connecting frame (7), the telescopic frame (8) is in an "L" shape, and one end of the telescopic frame (8) is fixed to the surface of the positioning card plate (9).

6. A weld rapid detection device according to claim 5, characterized in that: A pin is provided at the intersection in the middle of the X-shaped folding frame (2), a controller (10) is fixedly mounted on the upper end of the pin, and the longitudinal wave generator (5) and the receiver (6) are both electrically connected to the controller (10) via a wire.

7. A weld rapid detection device according to claim 6, characterized in that: The surface of the rotating roller (21) is provided with an annular groove (22), the annular groove (22) is arc-shaped and fits the surface of the steel pipe body (1), and a rubber pad is bonded to the inner wall of the annular groove (22).

8. A weld rapid detection device according to claim 7, characterized in that: Both ends of the rotating roller (21) are provided with slots (23), the other end of the insertion rod (24) is fixedly provided with a boss (25), the boss (25) is slidably installed in the inner cavity of the slot (23) and is fixedly connected to the other end of the insertion rod (24), the inner cavity of the slot (23) is provided with a tensioning connection (26), and the two ends of the tensioning connection (26) are respectively fixedly connected to the inner wall of the slot (23) and the boss (25).

9. A weld rapid detection device according to claim 8, characterized in that: A connecting block (27) is fixedly provided at one end of the insertion rod (24), a suspension shaft (28) is fixedly connected to the middle of the connecting block (27), the suspension shaft (28) is in a "T" shape, and the upper end of the suspension shaft (28) is movably connected to the X-shaped folding frame (2).

10. A detection method using the weld rapid detection device according to any one of claims 1 to 9, characterized in that: The specific steps include: Step 1: Pull the X-shaped folding frame (2) to unfold the X-shaped folding frame (2), and the positioning card plate (9) is located at the lower end of the shaft rod (3) under the action of gravity. The X-shaped folding frame (2) is placed from top to bottom on the outer side of the steel pipe body (1) until the positioning card plate (9) is flush with the X-shaped folding frame (2); Step 2: Release the pull of the X-shaped folding frame (2), and the tension provided by the tensioning lever (26) causes the X-shaped folding frame (2) to fold. At this time, the shaft (3) moves accordingly, and the positioning clamp (9) is clamped on the outside of the steel pipe body (1), until the four positioning clamps (9) are symmetrically clamped on both sides of the two ends of the steel pipe body (1). At this time, the longitudinal wave generator (5) and the receiver (6) are respectively located on both sides of the steel pipe body (1), and the line connecting the two coincides with the diameter of the steel pipe body (1); Step 3: Release the X-shaped folding frame (2), the X-shaped folding frame (2) moves downward under the action of gravity, the roller (21) presses down on the surface of the steel pipe body (1), and then the longitudinal wave generator (5) and the receiver (6) are started through the controller (10), the longitudinal wave generator (5) emits longitudinal waves, the longitudinal waves propagate from the upper and lower parts of the steel pipe body (1), and interfere with each other at the receiver (6), and the receiver (6) receives the interfered longitudinal waves, and the staff identifies the weld defects on the surface of the steel pipe body (1) by the longitudinal wave amplitude displayed on the controller (10); Step 4: Move the X-shaped folding frame (2) along the length direction of the steel pipe body (1), and repeat step 3, using the longitudinal wave generator (5) and the receiver (6) to detect the welds at different positions along the length direction of the steel pipe body (1).

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