An ultrasonic flaw detector for detecting cracks in railway tracks

Abstract

This utility model provides an ultrasonic flaw detector for detecting cracks in railway tracks. The ultrasonic flaw detector for detecting cracks in railway tracks includes a flaw detector body. An automatic winding component is detachably connected to the side wall of the flaw detector body. The automatic winding component includes a shell. A winding assembly is rotatably connected to the inner side wall of the shell. A cavity is provided between the winding assembly and the inner side wall of the shell. A coil spring is provided in the cavity. One end of the coil spring is fixedly connected to the inner side of the shell, and the other end of the coil spring is fixedly connected to the winding assembly. A reciprocating screw is also rotatably connected to the inner side wall of the shell. Both ends of the reciprocating screw are movably connected to transmission components. The ends of the two transmission components away from the reciprocating screw are movably connected to both sides of the winding assembly. A guide is slidably connected to the side wall of the reciprocating screw. An electric wire is inserted into the winding assembly. One end of the electric wire passes through the inner cavity of the winding assembly to the outer side of the shell. This design ensures convenient operation, effectively protects the structural integrity of the electric wire, and significantly extends the service life of the flaw detector.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic flaw detectors, and in particular to an ultrasonic flaw detector for detecting cracks in railway tracks. Background Technology

[0002] There are many types of ultrasonic flaw detectors, but in actual flaw detection processes, pulse-echo ultrasonic flaw detectors are the most widely used. Generally, in homogeneous materials, the presence of defects will cause discontinuities in the material. These discontinuities often result in inconsistent acoustic impedances. According to the reflection theorem, ultrasonic waves will be reflected at the interface between two media with different acoustic impedances. The magnitude of the reflected energy is related to the difference in acoustic impedance between the two media on both sides of the interface and the orientation and size of the interface. Pulse-echo ultrasonic flaw detectors are designed based on this principle.

[0003] Patent CN220154348U discloses an easy-to-handle ultrasonic flaw detector for tunnel railways, including a flaw detector body. A wire is connected to one side of the flaw detector body, and a probe is installed at the end of the wire. The flaw detector body includes a protective structure sleeved on its outer wall. The protective structure includes a storage frame sleeved on the outer wall of the flaw detector body. A sealing strip is provided on the right side of the storage frame. A storage groove is formed on the right surface of the storage frame, and two pairs of limiting seat hidden grooves are fixed to the inner wall of the storage groove. This utility model, through its protective structure... The device effectively slows down the wear and tear on the outer wall of the flaw detector and can also store and conceal the wires between the probe and the flaw detector for protection. The flaw detector can be easily carried by simply gripping the handle. At the same time, the sunshade can be pulled out to block external sunlight and prevent glare from the display screen from affecting the viewing of the detected data. However, the operator needs to roll up the wires and store them in the storage slot during the storage process. Manually rolling up the wires may cause excessive bending and damage, which is not conducive to the protection of the wires.

[0004] Therefore, it is necessary to provide a new ultrasonic flaw detector for detecting cracks in railway tracks to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an ultrasonic flaw detector for detecting cracks in railway tracks.

[0006] The ultrasonic flaw detector for detecting cracks in railway tracks provided by this utility model includes a flaw detector body, and an automatic winding component is detachably connected to the side wall of the flaw detector body.

[0007] The automatic winding component includes a housing, with a winding assembly rotatably connected to the inner wall of the housing. A cavity is provided between the winding assembly and the inner wall of the housing, and a coil spring is provided in the cavity. One end of the coil spring is fixedly connected to the inner side of the housing, and the other end of the coil spring is fixedly connected to the winding assembly. A reciprocating screw is also rotatably connected to the inner wall of the housing. Both ends of the reciprocating screw are movably connected to transmission assemblies. The ends of the two transmission assemblies away from the reciprocating screw are movably connected to both sides of the winding assembly. A guide is slidably connected to the side wall of the reciprocating screw. An electric wire is inserted into the winding assembly, and one end of the electric wire passes through the inner cavity of the winding assembly to the outer side of the housing.

[0008] Preferably, the take-up assembly includes a take-up drum with holes in its side wall. The wire passes through the holes and is inserted into the inner cavity of the take-up drum. Turntables are fixedly connected to both sides of the take-up drum. Both turntables are rotatably connected to the inner side wall of the outer casing, and the two turntables are arranged opposite to each other.

[0009] Preferably, the transmission assembly includes a first sprocket and a second sprocket. The first sprocket is fixedly connected to the outer wall of the turntable, and the second sprocket is fixedly connected to the outer wall of the reciprocating lead screw. The first sprocket and the second sprocket are driven by a chain.

[0010] Preferably, a limiting assembly is movably connected to the side wall of the outer shell. The limiting assembly includes a movable rod that passes through the side wall of the outer shell. An elastic element is nested on the outer wall of the movable rod. One end of the elastic element is fixedly connected to the outer wall of the outer shell, and the other end of the elastic element is fixedly connected to the end of the movable rod away from the reciprocating lead screw. A receiving plate is fixedly connected to the end of the movable rod adjacent to the reciprocating lead screw, and a locking block is fixedly connected to the end of the receiving plate away from the movable rod. The locking block is inserted into the side wall of the turntable.

[0011] Preferably, the turntable sidewall is provided with a plurality of snap-fit ​​grooves, and the plurality of snap-fit ​​grooves are arranged in a circular array around the central axis of the turntable.

[0012] Preferably, the outer casing has a polygonal through hole on its side wall, and the movable rod matches the polygonal through hole.

[0013] Preferably, the guide includes a movable block, which is slidably connected to the side wall of the reciprocating screw. A limit plate is rotatably connected to the side of the movable block away from the reciprocating screw. Two guide rods are fixedly connected to the inner side wall of the housing, and both guide rods pass through the limit plate.

[0014] Preferably, one end of the wire adjacent to the take-up assembly is detachably connected to a wiring port, which is detachably connected to the flaw detector body. The other end of the wire is sleeved on a guide and passes through the side wall of the housing. One end of the wire adjacent to the guide is detachably connected to a detection probe.

[0015] Compared with related technologies, the ultrasonic flaw detector for detecting cracks in railway tracks provided by this utility model has the following advantages:

[0016] The automatic and orderly winding of the wire is achieved through the elastic reset of the coil spring and the linkage mechanism of the reciprocating screw, so that the wire is evenly distributed on the winding drum, avoiding the messy tangling or excessive bending that may occur during manual winding. At the same time, with the locking and fixing function of the limit component, the wire length can be freely adjusted and accidental rebound can be prevented. This not only ensures the convenience of operation, but also effectively protects the structural integrity of the wire and significantly extends the service life of the flaw detector. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of the ultrasonic flaw detector for detecting cracks in railway tracks provided by this utility model;

[0018] Figure 2 A cross-sectional schematic diagram of the automatic winding component for detecting cracks in railway tracks provided by this utility model;

[0019] Figure 3 A partial structural diagram of the railway track crack detection provided by this utility model. Figure 1 ;

[0020] Figure 4 A partial structural diagram of the railway track crack detection provided by this utility model. Figure 2 .

[0021] The diagram is labeled as follows: 1. Flaw detector body; 2. Automatic winding component; 21. Outer shell; 22. Winding assembly; 221. Winding drum; 222. Hole; 223. Turntable; 23. Cavity; 24. Coil spring; 25. Reciprocating screw; 26. Transmission assembly; 261. Sprocket 1; 262. Sprocket 2; 263. Chain; 27. Guide component; 271. Movable block; 272. Limiting plate; 273. Guide rod; 28. Wiring port; 29. ​​Detection probe; 3. Limiting assembly; 31. Movable rod; 32. Elastic component; 33. Receiving plate; 34. Locking block; 35. Locking groove; 36. Through hole; 4. Wire. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please refer to the following: Figure 1 — Figure 4 ,in, Figure 1 A schematic diagram of the overall structure of the ultrasonic flaw detector for detecting cracks in railway tracks provided by this utility model; Figure 2 A cross-sectional schematic diagram of the automatic winding component for detecting cracks in railway tracks provided by this utility model; Figure 3 A partial structural diagram of the railway track crack detection provided by this utility model. Figure 1 ; Figure 4 A partial structural diagram of the railway track crack detection provided by this utility model. Figure 2 .

[0024] In practical implementation, an ultrasonic flaw detector used for detecting cracks in railway tracks has the following structure: Figure 1 — Figure 4 As shown, it includes: a flaw detector body 1, and an automatic winding component 2 detachably connected to the side wall of the flaw detector body 1;

[0025] The automatic winding component 2 includes a housing 21. A winding assembly 22 is rotatably connected to the inner wall of the housing 21. A cavity 23 is provided between the winding assembly 22 and the inner wall of the housing 21. A coil spring 24 is provided in the cavity 23. One end of the coil spring 24 is welded to the inner side of the housing 21, and the other end of the coil spring 24 is welded to the winding assembly 22. A reciprocating screw is also rotatably connected to the inner wall of the housing 21. Both ends of the reciprocating screw are engaged with transmission components 26. The ends of the two transmission components 26 away from the reciprocating screw 25 are respectively movably connected to... On both sides of the take-up assembly 22, guides 27 are slidably connected to the sidewalls of the reciprocating screw 25. A wire 4 is inserted inside the take-up assembly 22. One end of the wire 4 passes through the inner cavity of the take-up assembly 22 to the outer side of the outer shell 21. A wiring port 28 is detachably connected to one end of the wire 4 near the take-up assembly 22. The wiring port 28 is detachably connected to the flaw detector body 1. The other end of the wire 4 is sleeved on the guide 27 and passes through the sidewall of the outer shell 21. A detection probe 29 is detachably connected to one end of the wire 4 near the guide 27.

[0026] The take-up assembly 22 includes a take-up drum 221. The side wall of the take-up drum 221 has a hole 222. The wire 4 passes through the hole 222 and is inserted into the inner cavity of the take-up drum 221. Turntables 223 are fixedly connected to both sides of the take-up drum 221. Both turntables 223 are rotatably connected to the inner side wall of the outer shell 21, and the two turntables 223 are arranged opposite to each other.

[0027] It should be noted that the outer casing 21 is screwed to the side wall of the flaw detector body 1. One end of the wire 4 is inserted into the flaw detector body 1, and then the railway track crack is detected by the detection probe 29. When it is necessary to pull out the wire 4, the detection probe 29 is pulled, and the detection probe 29 drives the take-up drum 221 to rotate. At this time, the take-up drum 221 releases the wire outward, and the take-up drum 221 drives the turntable 223 to rotate. The turntable 223 then drives the coil spring 24 to wind up the wire. After the inspection is completed, the inspector releases the detection probe 29. Under the action of the coil spring 24, the turntable 223 rotates in the opposite direction, so that the take-up drum 221 winds up the wire 4. During the winding process of the take-up drum 221, the turntable 223 drives the reciprocating screw 25 to rotate through the transmission component 26. The reciprocating screw 25 drives the wire 4 to perform periodic reciprocating motion, so that the wire 4 is regularly wound on the surface of the take-up drum 221, avoiding the possibility of the wire 4 being tangled due to random arrangement, and preventing the wire 4 from being damaged due to tangling.

[0028] The transmission assembly 26 includes a first sprocket 261 and a second sprocket 262. The first sprocket 261 is fixedly connected to the outer wall of the turntable 223, and the second sprocket 262 is fixedly connected to the outer wall of the reciprocating screw 25. The first sprocket 261 and the second sprocket 262 are driven by a chain 263.

[0029] It should be noted that by pulling the wire 4, the take-up drum 221 is driven to rotate, the take-up drum 221 drives the turntable 223 to rotate, the turntable 223 drives the first sprocket 261 to rotate, the first sprocket 261 drives the second sprocket 262 to rotate through the chain 263, thereby causing the reciprocating screw 25 to drive the guide 27 to slide, so that the wire 4 performs periodic reciprocating motion.

[0030] A limiting component 3 is movably connected to the side wall of the outer shell 21. The limiting component 3 includes a movable rod 31 that passes through the side wall of the outer shell 21. An elastic element 32 is nested on the outer wall of the movable rod 31. One end of the elastic element 32 is fixedly connected to the outer wall of the outer shell 21, and the other end of the elastic element 32 is fixedly connected to the end of the movable rod 31 away from the reciprocating screw 25. A receiving plate 33 is fixedly connected to the end of the movable rod 31 adjacent to the reciprocating screw 25. A locking block 34 is fixedly connected to the end of the receiving plate 33 away from the movable rod 31. The locking block 34 is inserted into the side wall of the turntable 223.

[0031] The elastic element 32 includes a return spring, one end of which is fixedly connected to the outer wall of the housing 21, and the other end of which is fixedly connected to the movable rod 31.

[0032] The turntable 223 has multiple snap-fit ​​slots 35 on its side wall, and the multiple snap-fit ​​slots 35 are arranged in a circular array around the central axis of the turntable 223;

[0033] The outer casing 21 has a polygonal through hole 36 on its side wall, and the movable rod 31 is matched with the polygonal through hole 36.

[0034] It should be noted that since both the through hole 36 and the movable rod 31 are polygonal, the movable rod 31 and the through hole 36 will not rotate relative to each other, so that the movable rod 31 can only slide left and right perpendicular to the side wall of the outer shell 21.

[0035] It should be noted that by pressing the movable rod 31, the movable rod 31 moves the receiving plate 33 away from the turntable 223. At this time, the locking groove 35 releases its restriction on the locking block 34, and the turntable 223 can then rotate. When the operator pulls the wire 4 to the appropriate length, they release the movable rod 31. Under the reset action of the elastic element 32, the movable rod 31 extends along the passage. At this time, the locking block 34 and the locking groove 35 re-engage, thereby limiting the turntable 223. This eliminates the need for the operator to constantly apply pulling force to the wire 4, thus optimizing the operator's user experience.

[0036] The guide component 27 includes a movable block 271, which is slidably connected to the side wall of the reciprocating lead screw 25. The movable block 271 is rotatably connected to a limiting plate 272 on the side away from the reciprocating lead screw 25. Two guide rods 273 are fixedly connected to the inner side wall of the outer shell 21, and both guide rods 273 pass through the limiting plate 272.

[0037] The working principle of this utility model is as follows: When crack detection is required on railway tracks, first press the movable rod 31 to release the locking block 34 from limiting the turntable 223. Then pull the detection probe 29 to make the wire 4 drive the winding drum 221 to rotate. The winding drum 221 then drives the turntable 223 to rotate, and the turntable 223 drives the coil spring 24 to wind up the wire. When the wire 4 is stretched to a suitable length, release the pressure applied to the movable rod 31. At this time, under the action of the return spring, the locking block 34 and the locking groove 35 re-engage, and then the detection is performed. The operator can then use the detection probe 29 to detect cracks in the railway track. After the inspection is completed, press the movable rod 31 to release the locking block 34 from the turntable 223. Then, the inspector slowly releases the wire 4. During this process, the turntable 223 will drive the reciprocating screw 25 to rotate via the chain 263. The reciprocating screw 25 will drive the movable block 271 and the limiting plate 272 to move back and forth periodically along the guide rod 273, so that the wire 4 is regularly distributed on the outer wall of the winding drum 221, preventing the wire 4 from getting tangled and damaged.

[0038] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0039] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An ultrasonic flaw detector for detecting cracks in railway tracks, characterized in that, Includes a flaw detector body (1), and an automatic winding component (2) is detachably connected to the side wall of the flaw detector body (1). The automatic winding component (2) includes a housing (21), and a winding assembly (22) is rotatably connected to the inner wall of the housing (21). A cavity (23) is provided between the winding assembly (22) and the inner wall of the housing (21). A coil spring (24) is provided in the cavity (23). One end of the coil spring (24) is fixedly connected to the inner side of the housing (21), and the other end of the coil spring (24) is fixedly connected to the winding assembly (22). The inner wall of the housing (21) can also rotate. A reciprocating lead screw (25) is connected, and transmission components (26) are movably connected to both ends of the reciprocating lead screw (25). The two transmission components (26) are movably connected to the two sides of the take-up assembly (22) at the ends away from the reciprocating lead screw (25). A guide (27) is slidably connected to the side wall of the reciprocating lead screw (25). An electric wire (4) is inserted inside the take-up assembly (22). One end of the electric wire (4) is inserted from the inner cavity of the take-up assembly (22) to the outer side of the outer shell (21).

2. The ultrasonic flaw detector for detecting cracks in railway tracks according to claim 1, characterized in that, The take-up assembly (22) includes a take-up drum (221), and the side wall of the take-up drum (221) has a hole (222). The wire (4) passes through the hole (222) and is inserted into the inner cavity of the take-up drum (221). Turntables (223) are fixedly connected to both sides of the take-up drum (221). The two turntables (223) are rotatably connected to the inner side wall of the outer shell (21), and the two turntables (223) are arranged opposite to each other.

3. The ultrasonic flaw detector for detecting cracks in railway tracks according to claim 2, characterized in that, The transmission assembly (26) includes a first sprocket (261) and a second sprocket (262). The first sprocket (261) is fixedly connected to the outer wall of the turntable (223), and the second sprocket (262) is fixedly connected to the outer wall of the reciprocating screw (25). The first sprocket (261) and the second sprocket (262) are driven by a chain (263).

4. The ultrasonic flaw detector for detecting cracks in railway tracks according to claim 3, characterized in that, The side wall of the outer shell (21) is movably connected to a limiting component (3). The limiting component (3) includes a movable rod (31) that passes through the side wall of the outer shell (21). An elastic element (32) is nested on the outer side wall of the movable rod (31). One end of the elastic element (32) is fixedly connected to the outer side wall of the outer shell (21), and the other end of the elastic element (32) is fixedly connected to the end of the movable rod (31) away from the reciprocating screw (25). A receiving plate (33) is fixedly connected to the end of the movable rod (31) adjacent to the reciprocating screw (25). A locking block (34) is fixedly connected to the end of the receiving plate (33) away from the movable rod (31). The locking block (34) is inserted into the side wall of the turntable (223).

5. The ultrasonic flaw detector for detecting cracks in railway tracks according to claim 4, characterized in that, The turntable (223) has multiple snap-fit ​​slots (35) on its side wall, and the multiple snap-fit ​​slots (35) are arranged in a circular array around the central axis of the turntable (223).

6. The ultrasonic flaw detector for detecting cracks in railway tracks according to claim 5, characterized in that, The outer casing (21) has a polygonal through hole (36) on its side wall, and the movable rod (31) matches the polygonal through hole (36).

7. The ultrasonic flaw detector for detecting cracks in railway tracks according to claim 6, characterized in that, The guide (27) includes a movable block (271) and a limiting plate (272). The movable block (271) is slidably connected to the side wall of the reciprocating screw (25). The movable block (271) is rotatably connected to the limiting plate (272) on the side away from the reciprocating screw (25). Two guide rods (273) are fixedly connected to the inner side wall of the outer shell (21). Both guide rods (273) pass through the limiting plate (272).

8. The ultrasonic flaw detector for detecting cracks in railway tracks according to claim 7, characterized in that, One end of the wire (4) near the take-up assembly (22) is detachably connected to a wiring port (28), which is detachably connected to the flaw detector body (1). The other end of the wire (4) is sleeved on the limiting plate (272) and passes through the side wall of the outer shell (21). One end of the wire (4) near the limiting plate (272) is detachably connected to a detection probe (29).

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