A flaw detection device for cast steel parts

Abstract

The present application relates to the technical field of flaw detection and inspection, and specifically discloses a flaw detection and inspection device for cast steel parts, comprising: an ultrasonic probe, which is located above a detection station; a feed assembly, which is located on the detection station and is used to receive a round tube and drive the round tube to advance in a spiral; a guide assembly, which is located in front of the detection station and is used to guide the round tube into the feed assembly; a transverse movement assembly, which is located between the guide assembly and the feed assembly and is used to drive the round tube to move from the guide assembly to the feed assembly, and the feed assembly drives the pipe to be fed horizontally in a spiral so that the ultrasonic wave is vertically projected onto the outer surface of the pipe, thereby achieving a better ultrasonic flaw detection and inspection effect. At the same time, the guide assembly and the transverse movement assembly cooperate to transport the pipe to the feed assembly, and the return assembly can make the pipe withdraw from the feed assembly. Therefore, the loading and unloading operations of the pipe are very simple, and the inspection speed of the pipe can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of flaw detection, and in particular to a flaw detection device for steel castings. Background Art

[0002] During the production process, steel castings often develop various casting defects. Common defects include: pinholes, sand sticking, pores, keyholes, shrinkage, sand inclusions, scarring, and cracks. Some of these defects occur internally, affecting the structural performance and product quality. Therefore, steel castings generally undergo nondestructive testing (NDT) before shipment to identify and address defects. Common NDT methods include ultrasonic testing, radiographic testing, magnetic particle testing, and penetrant testing.

[0003] The principle of ultrasonic flaw detection is that ultrasound waves propagate at different speeds in solids and liquids, and attenuate extremely rapidly in air. When ultrasound waves penetrate a solid with a core, crack, or other damage, they are blocked at the interface between the solid and the air, generating a reflected wave. This reflected wave is then received and displayed by electronic equipment, revealing any flaws within the solid. The depth of the flaw can also be determined based on the time interval between the transmitted and reflected waves and their propagation speed within the solid.

[0004] In the prior art, when flaw detection is performed on tubular cast steel products, the ultrasonic probe only briefly scans the cast steel product, so the ultrasonic waves emitted by the ultrasonic probe cannot vertically scan the surface of the product, resulting in poor flaw detection results. Summary of the Invention

[0005] The present application provides a flaw detection device for steel castings, which solves the technical problem in the prior art that when performing flaw detection on circular tubular steel castings, the ultrasonic probe only briefly scans the steel casting, so the ultrasonic waves emitted by the ultrasonic probe cannot vertically scan the surface of the product, resulting in poor flaw detection effect. The application ensures that the ultrasonic probe is always perpendicular to the surface of the circular tubular steel casting, thereby achieving better flaw detection effect.

[0006] The present application provides a steel casting flaw detection device, comprising:

[0007] An ultrasonic probe is located above the inspection station. When the round tube moves to the inspection station, the ultrasonic probe emits ultrasonic waves to the outer surface of the round tube to perform flaw detection on the outer wall of the round tube;

[0008] A feeding assembly is located on the inspection station and is used to receive the round tube and drive the round tube to advance in a spiral to facilitate flaw detection by the ultrasonic probe;

[0009] A guide assembly, located in front of the inspection station and used to guide the round tube into the feeding assembly;

[0010] A transverse movement assembly is located between the guide assembly and the feed assembly, and is used to drive the round tube to move from the guide assembly to the feed assembly.

[0011] Furthermore, the feed assembly includes a feed seat, a feed screw seat is provided on the feed seat, a feed screw is movably provided on the feed screw seat, one end of the feed screw is connected to the movable seat through a bearing, a feed cylinder is provided on the feed seat, and an output end of the feed cylinder is connected to the movable seat;

[0012] The other end of the feed screw is connected to a vertical plate, a blocking plate is provided on the left side of the vertical plate, the blocking plate is parallel to the vertical plate, and a screw bracket is provided on the inner surface of the blocking plate, an expansion screw is provided on the screw bracket, and one end of the expansion screw is connected to the expansion motor;

[0013] The expansion screw is a bidirectional screw and is provided with two expansion screw seats. The two expansion screw seats move in opposite directions. The expansion screw seats are connected to an expansion clamping rod. The blocking plate is provided with a through hole for the expansion clamping rod to pass through.

[0014] Furthermore, the guide assembly includes a first guide bracket arranged on the workbench, the first guide bracket is vertical and a first fixing seat is arranged on the top of the first guide bracket, a first guide cylinder is vertically passed through the first fixing seat, and two guide slide bars are connected to the lower end of the first guide cylinder;

[0015] The guide slide bar includes a vertical section, the lower end of the vertical section is bent at an angle to form a curved section, and the end of the curved section is connected to a horizontal section.

[0016] Furthermore, the guide assembly also includes a second guide bracket, a second guide cylinder is provided on the second guide bracket, the second guide cylinder is horizontally arranged, the guide slide rod extends into the second guide cylinder, and the guide slide rod is connected to the inner wall of the second guide cylinder.

[0017] Furthermore, a blocking block is provided on the inner wall of the second guide cylinder. The blocking block is arranged tightly against the top of the second guide cylinder and its thickness gradually increases. After the round tube enters the second guide cylinder, its contact with the blocking block gradually deepens. Under the resistance of the blocking block, the round tube stops moving.

[0018] Furthermore, the transverse movement assembly includes a transverse movement seat, a transverse movement slot is provided on the transverse movement seat, a transverse movement slide is slidably provided in the transverse movement slot, a transverse movement plate is provided on the transverse movement slide, the transverse movement plate is vertically provided and a first clamping rod and a second clamping rod are provided thereon, and the first clamping rod and the second clamping rod are symmetrically provided;

[0019] The first clamping rod includes a first horizontal section and a second horizontal section, the second horizontal section is located behind the first horizontal section and is lower than the first horizontal section, and a first transition section is provided between the first horizontal section and the second horizontal section;

[0020] The second clamping rod includes a third horizontal section and a fourth horizontal section. The fourth horizontal section is located behind the third horizontal section and is lower than the third horizontal section. A second transition section is provided between the third horizontal section and the fourth horizontal section.

[0021] Furthermore, a discharge notch is provided on the workbench, and the discharge notch is used to receive the round tube detached from the feeding assembly. A discharge cylinder is provided below the discharge notch, and the round tube slides in the discharge cylinder.

[0022] The discharge notch is located between the guide assembly and the feed assembly, the discharge cylinder is vertically arranged, and the upper end of the discharge cylinder is connected to the guide cylinder.

[0023] Furthermore, it also includes a return component, which is arranged between the discharge gap and the feed component, and is used to remove the round tube from the feed component and push it into the discharge gap.

[0024] Furthermore, the return component includes:

[0025] a return partition, the return partition being located in front of the blocking plate;

[0026] a return cylinder, the return cylinder being arranged horizontally and parallel to the feeding direction of the feeding assembly;

[0027] A return seat, the return seat being connected to the output end of the return cylinder and having a return slide groove;

[0028] A return slide is slidably arranged in the return slide groove, and the return slide is connected to the return partition through a bracket.

[0029] The technical solution provided by this application has at least the following technical effects or advantages:

[0030] 1. Since the ultrasonic probe is located above the detection station and emits ultrasonic waves vertically downward, and the round tube is placed horizontally, the ultrasonic waves can be projected vertically onto the surface of the pipe. At the same time, by setting a feed assembly, the output end of the feed assembly penetrates into the round tube and fixes the round tube from the inside, and then drives the round tube to spiral forward, so that all parts of the outer surface of the pipe can be exposed under the ultrasonic probe, thereby achieving better ultrasonic flaw detection effect.

[0031] 2. Due to the use of guide components, transverse movement components and return components, the guide components and transverse movement components work together to conveniently transport the pipe fittings to the feed component, while the return component can make the pipe fittings withdraw from the feed component. Therefore, the loading and unloading operations of the pipe fittings are very simple, which can improve the inspection speed of the pipe fittings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of a flaw detection device for steel castings in an embodiment of the present application;

[0033] Figure 2 This is a structural diagram of a separate fixing mechanism in an embodiment of the present application;

[0034] Figure 3 This is a schematic diagram of the overall structure from another perspective in the embodiment of the present application;

[0035] Figure 4 This is a schematic structural diagram of the guide slide bar in an embodiment of the present application;

[0036] Figure 5 This is a schematic structural diagram of the second guide cylinder in the embodiment of the present application;

[0037] Figure 6 This is a schematic cross-sectional view of the second guide cylinder in the embodiment of the present application;

[0038] Figure 7 This is a schematic structural diagram of the transverse movement assembly in the embodiment of the present application;

[0039] Figure 8 It is an enlarged schematic diagram of part of the structure of the transverse movement assembly in the embodiment of the present application.

[0040] In the picture:

[0041] 1. Ultrasonic probe; 2. Feed assembly; 3. Guide assembly; 4. Transverse movement assembly; 5. Discharge notch; 6. Discharge cylinder; 7. Guide cylinder; 8. Return assembly;

[0042] 201, feed seat; 202, feed screw seat; 203, feed screw; 204, movable seat; 205, feed cylinder; 206, vertical plate; 207, blocking plate; 208, screw bracket; 209, expansion screw; 210, expansion motor; 211, expansion screw seat; 212, expansion clamping rod; 213, through hole;

[0043] 301, workbench; 302, first guide bracket; 303, first fixed seat; 304, first guide cylinder; 305, guide slide; 3051, vertical section; 3052, curved section; 3053, horizontal section; 306, second guide bracket; 307, second guide cylinder; 308, blocking block;

[0044] 401, transverse seat; 402, transverse slide; 403, transverse slide; 404, transverse plate; 405, first clamping rod; 4051, first horizontal section; 4052, second horizontal section; 4053, first transition section; 406, second clamping rod; 4061, third horizontal section; 4062, fourth horizontal section; 4063, second transition section;

[0045] 801, return partition; 802, return cylinder; 803, return seat; 804, return slide; 805, return slide. DETAILED DESCRIPTION

[0046] The embodiment of the present application discloses a flaw detection device for cast steel parts. Since the ultrasonic probe 1 is located above the detection station and emits ultrasonic waves vertically downward, and the round tube is placed horizontally, the ultrasonic waves can be projected vertically onto the surface of the tube. At the same time, by setting a feed component 2, the output end of the feed component 2 penetrates into the round tube and fixes the round tube from the inside of the round tube, and then drives the round tube to spiral forward, so that all parts of the outer surface of the tube can be exposed under the ultrasonic probe 1, thereby achieving a better ultrasonic flaw detection effect. At the same time, due to the use of a guide component 3, a transverse movement component 4 and a return component 8, the guide component 3 and the transverse movement component 4 cooperate to conveniently transport the tube to the feed component 2, and the return component 8 can make the tube withdraw from the feed component 2. Therefore, the loading and unloading operations of the tube are very simple, which can improve the detection speed of the tube.

[0047] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0048] Example 1, refer to Figures 1 to 8The present application provides a flaw detection device for steel castings, comprising an ultrasonic probe 1 and a feed assembly 2. The ultrasonic probe 1 is located above the detection station. When the round tube moves to the detection station, the ultrasonic probe 1 emits ultrasonic waves to the outer surface of the round tube to perform flaw detection on the outer wall of the round tube. The feed assembly 2 is located on the detection station. The feed assembly 2 is used to receive the round tube and drive the round tube to spirally advance to facilitate flaw detection by the ultrasonic probe 1.

[0049] In this embodiment, the ultrasonic probe 1 is located above the detection station and emits ultrasonic waves vertically downward, while the round tube is placed horizontally. Therefore, the ultrasonic waves can be projected vertically onto the surface of the tube. At the same time, by providing a feed assembly 2, the output end of the feed assembly 2 penetrates into the round tube and fixes the round tube from the inside of the round tube, and then drives the round tube to spiral forward, so that all parts of the outer surface of the tube can be exposed under the ultrasonic probe 1, thereby achieving a better ultrasonic flaw detection effect.

[0050] Specifically, refer to Figure 2 The feed assembly 2 includes a feed seat 201, a feed screw seat 202 is provided on the feed seat 201, a feed screw 203 is movably provided on the feed screw seat 202, one end of the feed screw 203 is connected to a movable seat 204 through a bearing, and a feed cylinder 205 is provided on the feed seat 201, and the output end of the feed cylinder 205 is connected to the movable seat 204.

[0051] Among them, the other end of the feed screw 203 is connected to a vertical plate 206, and a blocking plate 207 is provided on the left side of the vertical plate 206. The blocking plate 207 is parallel to the vertical plate 206, and a screw bracket 208 is provided on the inner surface of the blocking plate 207. An expansion screw 209 is provided on the screw bracket 208, and one end of the expansion screw 209 is connected to an expansion motor 210.

[0052] In this embodiment, the expansion screw 209 is a bidirectional screw and is provided with two expansion screw seats 211. The two expansion screw seats 211 move in opposite directions. The expansion screw seats 211 are connected to the expansion clamping rod 212, and the blocking plate 207 is provided with a through hole 213 for the expansion clamping rod 212 to pass through.

[0053] In the above-mentioned feed assembly 2, the feed screw seat 202 is threadedly sleeved on the feed screw 203, and the feed screw seat 202 is fixed, so when the feed screw 203 is driven to translate, the feed screw 203 will also rotate, thereby driving the pipe fitting to spirally feed.

[0054] The action of the feeding assembly 2 is divided into two parts, the first part is to fix the pipe, and the second part is to drive the pipe to move.

[0055] When the feeding assembly 2 needs to fix the pipe fitting, the pipe fitting is inserted into the outside of the two expansion clamping rods 212, and the expansion motor 210 is started, driving the expansion screw 209 to rotate, so that the two expansion screw seats 211 move away from each other, and then drive the two expansion clamping rods 212 away from each other until the two expansion clamping rods 212 respectively contact the two ends of the inner wall of the pipe fitting, support the pipe fitting, and achieve fixation of the pipe fitting.

[0056] When the feed assembly 2 is needed to drive the pipe to move, the output end of the feed cylinder 205 extends, driving the movable seat 204 to translate, and then driving the feed screw 203 to translate, so that the feed screw 203 rotates, and then drives the vertical plate 206 and the structure connected to the vertical plate 206 to spiral forward, that is, drives the expansion clamp rod 212 and the pipe to spiral forward.

[0057] Example 2, refer to Figures 1 to 8 On the basis of embodiment 1, in order to facilitate the loading and unloading of pipe fittings and thus improve the inspection speed of pipe fittings, this embodiment is provided with a guide assembly 3, which is located in front of the inspection station and is used to guide the round pipe into the feeding assembly 2.

[0058] Specifically, refer to Figure 3 The guide assembly 3 includes a first guide bracket 302 arranged on the workbench 301. The first guide bracket 302 is vertical and a first fixed seat 303 is provided at the top thereof. A first guide cylinder 304 is vertically passed through the first fixed seat 303. The lower end of the first guide cylinder 304 is connected to two guide slide rods 305.

[0059] Among them, reference Figure 4 The guide slide bar 305 includes a vertical section 3051 , the lower end of the vertical section 3051 is bent 90° to form a curved section 3052 , and the end of the curved section 3052 is connected to a horizontal section 3053 .

[0060] Furthermore, the guide assembly 3 also includes a second guide bracket 306, a second guide cylinder 307 is provided on the second guide bracket 306, the second guide cylinder 307 is horizontally arranged, the guide slide rod 305 extends into the second guide cylinder 307, and the guide slide rod 305 is connected to the inner wall of the second guide cylinder 307.

[0061] And, refer to Figure 5 and Figure 6 A blocking block 308 is provided on the inner wall of the second guide cylinder 307. The blocking block 308 is set tightly against the top of the second guide cylinder 307, and its thickness gradually increases. After the round tube enters the second guide cylinder 307, its contact with the blocking block 308 gradually deepens. Under the resistance of the blocking block 308, the round tube stops moving.

[0062] The round tube falls from the first guide cylinder 304, and after coming out from the lower end outlet of the first guide cylinder 304, it slides down along the slide groove formed by the two guide slide bars 305, passes through the vertical section 3051, the curved section 3052 and the horizontal section 3053 of the guide slide bar 305 in sequence, and finally enters the second guide cylinder 307. At this time, the round tube has a certain speed. After entering the second guide cylinder 307, the round tube gradually contacts the blocking block 308. Under the resistance of the blocking block 308, the round tube stops.

[0063] Furthermore, this embodiment also includes a transverse movement component 4, which is located between the guide component 3 and the feed component 2, and is used to drive the round tube to move from the guide component 3 to the feed component 2.

[0064] Specifically, refer to Figure 7 The transverse movement component 4 includes a transverse movement seat 401, a transverse movement slot 402 is provided on the transverse movement seat 401, a transverse movement slide 403 is slidingly provided in the transverse movement slot 402, a linear motor is provided in the transverse movement slot 402, the linear motor is connected to the transverse movement slide 403 and drives the transverse movement slide 403 to move in the transverse movement slot 402, a transverse movement plate 404 is provided on the transverse movement slide 403, the transverse movement plate 404 is vertically arranged and a first clamping rod 405 and a second clamping rod 406 are arranged thereon, and the first clamping rod 405 and the second clamping rod 406 are symmetrically arranged.

[0065] Among them, reference Figure 8 The first clamping rod 405 includes a first horizontal section 4051 and a second horizontal section 4052, the second horizontal section 4052 is located behind the first horizontal section 4051, and the second horizontal section 4052 is lower than the first horizontal section 4051, and a first transition section 4053 is provided between the first horizontal section 4051 and the second horizontal section 4052.

[0066] Similarly, the second clamping rod 406 includes a third horizontal section 4061 and a fourth horizontal section 4062, the fourth horizontal section 4062 is located behind the third horizontal section 4061, and the fourth horizontal section 4062 is lower than the third horizontal section 4061, and a second transition section 4063 is provided between the third horizontal section 4061 and the fourth horizontal section 4062.

[0067] When the pipe slides on the guide assembly 3, the transverse plate 404 is located below the curved section 3052 to prevent it from sliding down. After the pipe stops in the guide assembly 3, the transverse assembly 4 starts to operate: the linear motor drives the transverse slide 403 to move in the transverse chute 402, thereby driving the transverse plate 404, the first clamping rod 405, and the second clamping rod 406 to move horizontally. The distance between the second horizontal section 4052 and the fourth horizontal section 4062 is smaller than the inner diameter of the pipe, so the front ends of the first clamping rod 405 and the second clamping rod 406 are very easy to insert into the pipe. The distance between the first horizontal section 4051 and the third horizontal section 4061 is slightly larger than the inner diameter of the pipe. At the same time, the pipe has a certain weight. Therefore, driven by the movement of the transverse slide 403, the rear ends of the first clamping rod 405 and the second clamping rod 406 are also inserted into the pipe, and the pipe is fixed to the first clamping rod 405 and the second clamping rod 406.

[0068] It should be noted that in this embodiment, the first clamping rod 405 and the second clamping rod 406 are distributed in the vertical diameter direction of the pipe, while the two expansion clamping rods 212 are distributed in the horizontal radial direction of the pipe, so the first clamping rod 405, the second clamping rod 406 and the expansion clamping rod 212 will not collide.

[0069] After the pipe is fixed on the first clamping rod 405 and the second clamping rod 406, the transverse movement assembly 4 continues to drive the pipe to move until the pipe is sleeved on the outside of the two expansion clamping rods 212. After the feeding assembly 2 is actuated and fixes the pipe, the transverse movement assembly 4 is reset.

[0070] Furthermore, a unloading notch 5 is provided on the workbench 301, and the unloading notch 5 is used to receive the round tube detached from the feeding assembly 2. A discharge cylinder 6 is provided below the unloading notch 5, and the round tube slides in the discharge cylinder 6. The unloading notch 5 is located between the guide assembly 3 and the feeding assembly 2. The discharge cylinder 6 is vertically arranged, and the upper end of the discharge cylinder 6 is connected to a guide cylinder 7.

[0071] At the same time, this embodiment also includes a return component 8, which is arranged between the unloading gap 5 and the feeding component 2. The return component 8 is used to unload the round tube from the feeding component 2 and push it into the unloading gap 5.

[0072] Specifically, refer to Figure 2 , the return component 8 includes:

[0073] A return baffle 801, located in front of the blocking plate 207;

[0074] A return cylinder 802, the return cylinder 802 is horizontally arranged and parallel to the feeding direction of the feeding assembly 2;

[0075] A return seat 803, the return seat 803 is connected to the output end of the return cylinder 802, and a return slide groove 804 is provided on the return seat 803;

[0076] The return slide 805 is slidably arranged in the return slide groove 804, and the return slide 805 is connected to the return partition 801 through a bracket.

[0077] In this embodiment, a return chute 804 is provided. When the feeding assembly 2 is actuated to drive the pipe to be spirally fed, the return partition 801 is clamped between the pipe and the blocking plate 207 and moves along with the pipe. When the pipe inspection is completed, the return slide 805 is located at the rightmost end of the return chute 804.

[0078] When the return assembly 8 needs to be activated, the output end of the return cylinder 802 extends, driving the return seat 803 to move left, thereby causing the return chute 804 to move left, and the distance between the return slide 805 and the right end of the return chute 804 is reduced. After the return slide 805 contacts the right end of the return chute 804, as the output end of the return cylinder 802 extends, the return slide 805 also moves left, thereby driving the return partition 801 to move left, and the return partition 801 drives the pipe fitting to move left, so that the pipe fitting gradually moves away from the blocking plate 207. Finally, the pipe fitting falls into the unloading gap 5, is received by the guide cylinder 7, enters the discharge cylinder 6, and enters the subsequent process.

[0079] In subsequent processes, the inner wall of the pipe is inspected for flaws. The inner wall flaw detection mechanism also includes a feed assembly, a guide assembly, a transverse movement assembly, a discharge notch, a discharge cylinder, a guide cylinder, and a return assembly. However, the feed assembly in the inner wall flaw detection mechanism clamps and secures the pipe from the outside. The outer wall of the expansion clamp can be configured in a V-shape to facilitate clamping of the round pipe. The ultrasonic probe in the inner wall flaw detection mechanism is positioned on the axis of the pipe.

[0080] To sum up, in this application, since the ultrasonic probe 1 is located above the detection station and emits ultrasonic waves vertically downward, and the round tube is placed horizontally, the ultrasonic waves can be projected vertically onto the surface of the pipe. At the same time, by setting the feed component 2, the output end of the feed component 2 penetrates into the round tube and fixes the round tube from the inside of the round tube, and then drives the round tube to spiral forward, so that all parts of the outer surface of the pipe can be exposed under the ultrasonic probe 1, thereby achieving a better ultrasonic flaw detection effect.

[0081] At the same time, the present application sets up a guide component 3, a transverse movement component 4 and a return component 8. The guide component 3 and the transverse movement component 4 cooperate to conveniently transport the pipe fittings to the feed component 2, and the return component 8 can make the pipe fittings withdraw from the feed component 2. Therefore, the loading and unloading operations of the pipe fittings are very simple, which can improve the inspection speed of the pipe fittings.

[0082] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

[0083] The above is only a preferred specific implementation method of the embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the present application within the technical scope disclosed in the present application, and they should be covered by the scope of protection of the present application.

Claims

1. A flaw detection device for steel castings, characterized in that: include: An ultrasonic probe (1), the ultrasonic probe (1) being located above the detection station. When the round tube moves to the detection station, the ultrasonic probe (1) emits ultrasonic waves to the outer surface of the round tube to perform flaw detection on the outer wall of the round tube; A feeding assembly (2), the feeding assembly (2) being located on the inspection station, and the feeding assembly (2) being used to receive the round tube and drive the round tube to spirally advance, so as to facilitate flaw detection by the ultrasonic probe (1); The feed assembly (2) includes a feed seat (201), a feed screw seat (202) is provided on the feed seat (201), a feed screw (203) is movably provided on the feed screw seat (202), one end of the feed screw (203) is connected to a movable seat (204) via a bearing, a feed cylinder (205) is provided on the feed seat (201), and an output end of the feed cylinder (205) is connected to the movable seat (204); The other end of the feed screw (203) is connected to a vertical plate (206), a blocking plate (207) is provided on the left side of the vertical plate (206), the blocking plate (207) and the vertical plate (206) are parallel, and a screw bracket (208) is provided on the inner surface of the blocking plate (207), an expansion screw (209) is provided on the screw bracket (208), and one end of the expansion screw (209) is connected to an expansion motor (210); The expansion screw (209) is a bidirectional screw and is provided with two expansion screw seats (211), the two expansion screw seats (211) move in opposite directions, the expansion screw seats (211) are connected to an expansion clamping rod (212), and the blocking plate (207) is provided with a through hole (213) for the expansion clamping rod (212) to pass through. A guide assembly (3), the guide assembly (3) being located in front of the detection station, and the guide assembly (3) being used to guide the round tube into the feed assembly (2); The guide assembly (3) includes a first guide bracket (302) arranged on a workbench (301), the first guide bracket (302) is vertical and a first fixing seat (303) is arranged on the top of the first guide bracket (302), a first guide cylinder (304) is vertically passed through the first fixing seat (303), and two guide slide bars (305) are connected to the lower end of the first guide cylinder (304); The guide slide bar (305) comprises a vertical section (3051), the lower end of the vertical section (3051) is bent 90 degrees to form a curved section (3052), and the end of the curved section (3052) is connected to a horizontal section (3053); The guide assembly (3) further includes a second guide bracket (306), a second guide cylinder (307) is provided on the second guide bracket (306), the second guide cylinder (307) is horizontally arranged, the guide slide rod (305) extends into the second guide cylinder (307), and the guide slide rod (305) is connected to the inner wall of the second guide cylinder (307); A blocking block (308) is provided on the inner wall of the second guide cylinder (307). The blocking block (308) is arranged closely on the top of the second guide cylinder (307) and has a gradually increasing thickness. After the round tube enters the second guide cylinder (307), the contact with the blocking block (308) gradually deepens. Under the resistance of the blocking block (308), the round tube stops moving. A transverse movement assembly (4), the transverse movement assembly (4) being located between the guide assembly (3) and the feed assembly (2), and the transverse movement assembly (4) being used to drive the round tube to move from the guide assembly (3) to the feed assembly (2); The transverse movement assembly (4) includes a transverse movement seat (401), a transverse movement slot (402) is provided on the transverse movement seat (401), a transverse movement slide (403) is slidably provided in the transverse movement slot (402), a transverse movement plate (404) is provided on the transverse movement slide (403), the transverse movement plate (404) is vertically provided and a first clamping rod (405) and a second clamping rod (406) are provided thereon, and the first clamping rod (405) and the second clamping rod (406) are symmetrically provided; The first clamping rod (405) comprises a first horizontal section (4051) and a second horizontal section (4052), the second horizontal section (4052) is located behind the first horizontal section (4051), and the second horizontal section (4052) is lower than the first horizontal section (4051), and a first transition section (4053) is provided between the first horizontal section (4051) and the second horizontal section (4052); The second clamping rod (406) includes a third horizontal section (4061) and a fourth horizontal section (4062), wherein the fourth horizontal section (4062) is located behind the third horizontal section (4061) and is lower than the third horizontal section (4061), and a second transition section (4063) is provided between the third horizontal section (4061) and the fourth horizontal section (4062).

2. A steel casting flaw detection device according to claim 1, characterized in that: The workbench (301) is provided with a discharge notch (5), and the discharge notch (5) is used to receive the round tube detached from the feed assembly (2). A discharge barrel (6) is provided below the discharge notch (5), and the round tube slides in the discharge barrel (6); The discharge notch (5) is located between the guide assembly (3) and the feed assembly (2), the discharge cylinder (6) is vertically arranged, and the upper end of the discharge cylinder (6) is connected to a guide cylinder (7).

3. A steel casting flaw detection device according to claim 2, characterized in that: It also includes a return assembly (8), which is arranged between the discharge gap (5) and the feed assembly (2), and is used to remove the round tube from the feed assembly (2) and push it into the discharge gap (5).

4. A steel casting flaw detection device as claimed in claim 3, characterized in that: The return assembly (8) comprises: a return baffle (801), the return baffle (801) being located in front of the blocking plate (207); a return cylinder (802), the return cylinder (802) being arranged horizontally and having an output direction parallel to a feed direction of the guide assembly (3); A return seat (803), the return seat (803) is connected to the output end of the return cylinder (802), and a return slide groove (804) is provided on the return seat (803); A return slide (805), wherein the return slide (805) is slidably arranged in the return slide groove (804), and the return slide (805) is connected to the return partition (801) through a bracket.

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