Steel rail welding seam rail bottom scanning device

Abstract

The utility model relates to the technical field of scanning devices, in particular to a steel rail welding seam rail bottom scanning device which comprises fixing blocks, a sliding way arranged between the fixing blocks, two probe assemblies installed on the sliding way, at least one probe module arranged in each probe assembly, and a plurality of sub-probes arranged in an inner cavity of a probe module body. The sub-probe abuts against the slope surface of the rail bottom of the steel rail and scans the rail bottom of the steel rail; according to the scanning device, the scanning precision and efficiency are improved, the influence of human factors is eliminated, and the operation quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of scanning devices, in particular to a rail bottom scanning device for rail welds. Background Art

[0002] With the rapid development of seamless railways, there are a large number of rail welds on the line. The quality of rail welds and the level of flaw detection are related to operation safety. The structure of the rail bottom part of the rail weld is complex and damage prone, which is the key point and difficulty of ultrasonic flaw detection.

[0003] At present, the flaw detection of the rail bottom of rail welds usually adopts manual scanning with a single K2.5 probe. According to the operation requirements, the single K2.5 scanning of the rail bottom is divided into 4 scanning surfaces, and each scanning surface is divided into 6 scanning areas. During operation, the probe is placed on the rail bottom slope and deflected at a certain angle to perform reciprocating scanning on areas 1-6 respectively. At least 24 reciprocating scans are required for the rail bottom scan, and the scanning efficiency is low; during scanning, the probe is placed on the rail bottom slope straight or deflected at a certain angle, such as 8 degrees, 10 degrees, 15 degrees, for reciprocating scanning. The deflection angle of the probe depends entirely on the user's self - feeling, and the accuracy of the deflection angle cannot be guaranteed. The rail bottom scanning operation of rail welds is completely manually completed, which entirely depends on the technical level, technique, concentration, etc. of the operators, seriously affecting the quality of flaw detection operations.

[0004] Therefore, the applicant provides a rail bottom scanning device for rail welds to solve the problems raised in the above background art. Content of the Utility Model

[0005] The purpose of the utility model is to provide a rail bottom scanning device for rail welds to solve the problems in the background art, such as low efficiency of the rail bottom scanning operation of rail welds, many human factors, poor scanning accuracy, and seriously affecting the quality of flaw detection operations.

[0006] To solve the above - mentioned technical problems, the utility model provides a rail bottom scanning device for rail welds, which includes a fixed block. A slideway is arranged between the fixed blocks, and two groups of probe assemblies are installed on the slideway. At least one probe module is arranged in the probe assembly. Preferably, there are 2 probe modules. A number of identical sub - probes are arranged in the inner cavity of the probe module body. The sub - probes are abutted against the rail bottom slope of the rail to scan the rail bottom of the rail weld.

[0007] A further improvement of the technical solution of the utility model lies in that: the probe assembly further includes a housing. A groove cavity is arranged at the bottom of the housing. At least one probe module is suitably sleeved in the groove cavity. The probe module extends upward to set a probe wire. The probe wire penetrates through the guide post body. A first spring is sleeved outside the guide post. The top surface and the bottom surface of the first spring respectively abut against the top cavity surface of the groove cavity and the top surface of the probe module.

[0008] A further improvement of the technical solution of the present utility model lies in that: the guide post is fixed to the top surface of the probe module, the probe module is a convex body, the probe module is adaptively sleeved on the upper part of the groove cavity, the top cavity surface of the groove cavity abuts against the top surface of the first spring, and the telescopic movement of the first spring drives the probe module to move up and down in the groove cavity, so that the probe module fully abuts against the bottom slope of the rail.

[0009] A further improvement of the technical solution of the present utility model lies in that: a guide post is arranged at the top of the probe module, the guide post is adapted to slide in the housing, a lock nut is installed on the upper part of the guide post to prevent the probe module from falling, and the bottom of the probe module is an inclined surface, and the inclination angle of the inclined surface at the bottom of the probe module is adapted to abut against the bottom slope of the rail.

[0010] A further improvement of the technical solution of the present utility model lies in that: at least one slideway hole is penetrated through the housing body, the slideway hole is adapted to the slideway, at least 1 slideway is arranged, and a horizontal scale is arranged on the slideway for indicating the moving distance of the probe assembly.

[0011] A further improvement of the technical solution of the present utility model lies in that: the sub-probes in the probe module all adopt probes with a refraction angle of 60-70 degrees, the number of sub-probes in each probe module is 2-6, preferably 4 sub-probes, the sub-probes have no deflection angle, and the sub-probes are parallel to the center line of the bottom surface of the probe module.

[0012] A further improvement of the technical solution of the present utility model lies in that: the sub-probes in the probe module are set to have no deflection angle and a deflection angle, and the deflected sub-probe has a deflection angle of 5-30 degrees with respect to the center line of the bottom surface of the probe module.

[0013] A further improvement of the technical solution of the present utility model lies in that: magnets are respectively arranged on the bottom surface and the side surface of the fixed block body, and the magnets are respectively magnetically attracted to the bottom surface of the rail and the side surface of the rail waist.

[0014] A further improvement of the technical solution of the present utility model lies in that: a guide groove is arranged on the side wall of the housing body, the guide groove is adapted to the guide strips on both side walls of the encoder body, and the guide strips slide up and down in the guide groove.

[0015] A further improvement of the technical solution of the present utility model lies in that: the guide groove is adapted to the up and down sliding of the encoder, and the coding wheel in the encoder always abuts against the scale.

[0016] Adopting the above technical solution, the present utility model has the following beneficial effects:

[0017] 1. The rail weld bottom scanning device provided by the present utility model has a slideway arranged between the fixing blocks, and two groups of probe assemblies are installed on the slideway. A number of sub-probes are built into the probe module in the probe assembly. Pushing one group of probe assemblies can achieve forward scanning of 6 areas at the bottom of the rail weld; pushing the other group of probe assemblies can achieve reverse scanning of 6 areas at the bottom of the rail weld. Completing the entire weld scanning operation, the scanning operation time is reduced from the original 3 - 4 minutes to less than 30 seconds, eliminating the influence of human factors, reducing the operation difficulty, and improving the scanning accuracy and efficiency.

[0018] 2. The rail weld bottom scanning device provided by the present utility model has multiple sub-probes arranged in the probe module of the scanning device, and the sub-probes are placed without a deflection angle and with a deflection angle. The sub-probe placed without a deflection angle is parallel to the center line of the bottom surface of the probe module; the sub-probe with a deflection angle forms a deflection angle of 5 - 30 degrees with the center line of the bottom surface of the probe module. By pre-setting the deflection angle of the sub-probe, the deviation of manual operation is reduced, and the scanning accuracy and quality are improved.

[0019] 3. The rail weld bottom scanning device provided by the present utility model has an encoder arranged above the slideway. The encoder obtains the displacement and position information of the probe assembly by rolling the coding wheel on the slideway, and transmits this information to the flaw detector. The flaw detector generates a B-scan image according to the position information of each sub-probe and the A-scan waveform. In the original manual scanning, there was only the A-scan waveform of the probe, and the determination of damage completely depended on the technical level and concentration of the operator. The present utility model can generate a B-scan image of the scan, reducing the difficulty of damage interpretation, improving the ability to detect damage, and being conducive to subsequent damage analysis and data playback. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of the rail weld bottom scanning device in this embodiment;

[0022] Figure 2 It is a schematic structural diagram of the rail weld bottom scanning device in this embodiment;

[0023] Figure 3 For this embodiment Figure 1 It is a cross-sectional view of the probe assembly in

[0024] Figure 4 It is a rear view of the rail weld bottom scanning device in this embodiment;

[0025] Figure 5 This is a schematic diagram of the encoder structure in this embodiment;

[0026] Figure 6 This is a schematic diagram of the probe module structure in this embodiment.

[0027] Reference numerals: 1, rail; 2, fixing block; 3, slideway; 4, probe assembly; 31, scale; 41, housing; 42, probe module; 411, groove cavity; 412, slideway hole; 421, lock nut; 422, sub-probe; 423, probe wire; 424, guide post; 425, first spring; 43, coding wheel; 44, encoder; 45, mounting post; 46, second spring; 47, guide groove; 48, guide bar. Detailed implementation manners

[0028] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] Next, the present invention will be further explained and described in conjunction with specific implementation manners.

[0032] As Figures 1 to 6As shown in the figure, the rail bottom scanning device provided in this embodiment includes a fixing block 2. Magnets are respectively arranged on the bottom surface and the side surface of the fixing block 2 body, and the magnets are respectively magnetically attracted to the bottom surface of the rail 1 and the side surface of the rail waist of the rail 1. The fixing block 2 accurately fixes the scanning device on the bottom slope of the rail 1, reducing the influence of uncontrollable factors such as the user's technical level, manipulation, and concentration, reducing the influence of human factors, reducing the difficulty of the scanning operation and the technical level, improving the scanning accuracy and efficiency, and improving the quality of the flaw detection operation. A slideway 3 is arranged between the fixing blocks 2, and two groups of probe assemblies 4 are installed on the slideway 3. A housing 41 is arranged on the probe assembly 4 body. A groove cavity 411 is arranged at the bottom of the housing 41. A through slideway hole 412 is arranged at the upper part of the housing 41 body located in the groove cavity 411. The slideway hole 412 is adapted to pass through the slideway 3, and the probe assembly 4 slides horizontally on the slideway 3. The slideway hole 412 is preferably circular and can also be other shapes as long as it is adapted to the slideway 3. At least one slideway hole 412 is arranged, preferably two. Corresponding to the slideway 3, at least one slideway is arranged, preferably two. A horizontal scale 31 is arranged on the upper surface of one of the slideways 3. Preferably, the slideway hole 412 is circular, the lower part of the slideway 3 is circular, and the upper part is the horizontal scale 31. The structure of the scale 31 is similar to an inverted D shape. The scale 31 is used to indicate the specific traveling position of the probe assembly 4. The function of the slideway 3 is, on the one hand, to play a role in fixing and guiding the probe assembly 4, so that the probe assembly 4 does not deviate when sliding on the slideway 3, and on the other hand, to play a role in indicating the position of the probe assembly 4, and the position of the probe assembly 4 can be accurately read, and then the position of the weld can be accurately determined.

[0033] As Figures 1 to 6As shown in the figure, in this embodiment, two sets of probe assemblies 4 are installed on the slideway 3. The two sets of probe assemblies 4 respectively scan six areas simultaneously, improving the scanning efficiency. At least one probe module 42 is provided in each probe assembly 4, preferably two probe modules 42. A number of sub-probes 422 with the same angle are arranged in the main body. The sub-probes 422 are arranged in the probe module 42 and fixed in the probe module 42, ensuring the deflection angle of the sub-probes 422. The sub-probes 422 are abutted against the bottom slope of the rail 1 to scan the weld on the bottom slope of the rail 1, improving the detection accuracy of the scanning device. One probe module 42 scans areas 1 to 4, and the other probe module 42 scans areas 4 to 6. A total of 4 probe modules 42 in the two probe assemblies 4 scan six areas simultaneously, improving the scanning efficiency. The sub-probes 422 all use probes with a refraction angle of 60 to 70 degrees. The sub-probes 422 with the same refraction angle ensure the consistency of detection signals. The sub-probes 422 are arranged without a deflection angle, and the sound beam axis of the sub-probes 422 is parallel to the midline of the bottom surface of the probe module, or a deflection angle of 5 to 20 degrees is adopted, that is, the sub-probes 422 form a 5 to 20 degree angle with the midline of the bottom surface of the probe module 42. The number of sub-probes 422 is 2 to 6, preferably 4, 2 sub-probes 422 without a deflection angle, and 2 sub-probes 422 with a deflection angle, ensuring the detection range and accuracy.

[0034] In this embodiment, the main body of the probe assembly 4 includes a housing 41. A groove cavity 411 is provided at the bottom of the housing 41. The groove cavity 411 is adapted to be sleeved with at least one probe module 42. The probe module 42 is a convex body, and the structure of the probe module 42 is set to be smaller at the top and larger at the bottom to fit the groove cavity 411. A probe wire 423 extends upward inside each probe module 42. The probe wire 423 passes through the main body of the guide post 424 and is connected to the flaw detector through a plug provided at the end to transmit the signal of the probe module 42 to the flaw detector. A guide post 424 is provided at the top of the probe module 42. There is a gap between the guide post 424 and the housing 41, which facilitates the up and down movement of the guide post 424. A first spring 425 is sleeved on the outer periphery of the guide post 424. The bottom of the first spring 425 abuts against the top of the probe module 42, and the top of the first spring 425 abuts against the top wall of the groove cavity 411. The expansion and contraction of the first spring 425 drives the probe module 42 to move up and down in the groove cavity 411, so that the probe module 42 fully abuts against the bottom slope of the rail 1. The bottom of the probe module 42 is an inclined surface, and the inclination angle of the bottom inclined surface of the probe module 42 is adapted to abut against the bottom slope of the rail 1. The setting of the first spring 425 gives the probe module 42 a downward elastic force, and the bottom of the probe module 42 is an inclined surface, so that the sub-probe 422 fully abuts against the bottom slope of the rail 1 for scanning, improving the accuracy and quality of scanning. A lock nut 421 is sleeved on the upper part of the guide post 424. When the probe module 42 moves downward, it drives the guide post 424 to move downward until the lower surface of the lock nut 421 abuts against the inner wall of the housing 41. When the probe module 42 moves downward under the drive of the spring, it prevents the probe module 42 from sliding out of the groove cavity 411 and falling off.

[0035] In this embodiment, as Figures 1 to 6As shown in the figure, in this embodiment, a guide groove 47 is provided on one side wall of the upper part of the main body of the housing 41. The guide groove 47 is adapted to the guide bars 48 on both sides of the encoder 44. The encoder 44 is in clearance fit with the housing 41. The encoder 44 can slide up and down in the guide groove 47. The coding wheel 43 in the encoder 44 rotates on the scale 31. When the coding wheel 43 rotates, it causes the encoder 44 to slide up and down in the guide groove 47. An installation post 45 is provided at the bottom of the encoder 44. The installation post 45 penetrates downward through the housing 41 and is sleeved with a second spring 46. The telescopic movement of the second spring 46 drives the encoder 44 to slide up and down in the guide groove 47. The second spring 46 gives a certain elastic force and supporting force, so that the coding wheel 43 is in full contact with the scale 31. The coding wheel 43 rotates on the scale 31 without idling, making the counting of the encoder 44 accurate. The coding wheel 43 rolls on the scale 31. The setting of the scale 31 on the slideway 3 can increase the friction force between the slideway 3 and the coding wheel 43, preventing the coding wheel 43 from slipping when rotating on the slideway. The encoder 44 transmits the position information of the rolling of the coding wheel 43 to the flaw detector through the plug connected to the encoder 44. The flaw detector can accurately determine the position information of the weld seam. Through the encoder, the damage can be visually displayed. The A-display waveform on the flaw detector can be converted into a B-display image, reducing the difficulty of damage judgment for users. At the same time, it is also beneficial for later damage analysis and data playback.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Rail weld bottom inspection device, characterized in that, It includes fixed blocks (2). A slideway (3) is arranged between the fixed blocks (2). Two groups of probe assemblies (4) are installed on the slideway (3). At least one probe module (42) is arranged inside the probe assembly (4). Several sub-probes (422) are arranged in the inner cavity of the probe module (42). The sub-probes (422) are abutted against the bottom slope of the rail (1) to scan the bottom of the weld of the rail (1).

2. The rail bottom scanning device for rail welds according to claim 1, characterized in that, The probe assembly (4) further includes a housing (41). A groove cavity (411) is arranged at the bottom of the housing (41). At least one probe module (42) is properly sleeved in the groove cavity (411). The probe module (42) extends upward to set a probe wire (423). The probe wire (423) penetrates through the body of the guide post (424). A first spring (425) is sleeved outside the guide post (424). The top end face and the bottom end face of the first spring (425) are respectively abutted against the top cavity surface of the groove cavity (411) and the top surface of the probe module (42).

3. The rail bottom scanning device for rail welds according to claim 2, characterized in that, The guide post (424) is installed on the top surface of the probe module (42). The probe module (42) is a convex body. The probe module (42) is properly sleeved in the upper part of the groove cavity (411). The top cavity surface of the groove cavity (411) is abutted against the top end face of the first spring (425). The telescopic movement of the first spring (425) drives the probe module (42) to move up and down in the groove cavity (411), so that the probe module (42) fully abuts against the bottom slope of the rail (1).

4. The rail bottom scanning device for rail welds according to claim 1, characterized in that A guide post (424) is arranged at the top of the probe module (42). The guide post (424) is adapted to slide in the housing (41). A lock nut (421) is installed on the upper part of the guide post (424) to prevent the probe module (42) from falling. The bottom of the probe module (42) is an inclined surface. The inclination angle of the bottom inclined surface of the probe module (42) is adapted to abut against the bottom slope of the rail (1).

5. The rail bottom scanning device for rail welds according to claim 1, characterized in that, At least one slideway hole (412) is arranged through the body of the housing (41). The slideway hole (412) is adapted to the slideway (3). At least 1 slideway (3) is arranged. A horizontal scale (31) is arranged on the slideway (3) to indicate the moving distance of the probe assembly (4).

6. The rail bottom scanning device for rail welds according to claim 1, wherein The sub-probes (422) in the probe module (42) all adopt probes with a refraction angle of 60 - 70 degrees. The number of sub-probes (422) in each probe module (42) is 2 - 6. The sub-probes (422) have no deflection angle and are parallel to the midline of the bottom surface of the probe module (42).

7. The rail bottom scanning device for rail welds according to claim 6, wherein The sub-probes (422) in the probe module (42) are set with no deflection angle and deflection angle. The deflected sub-probes (422) form a deflection angle of 5 - 30 degrees with the midline of the bottom surface of the probe module (42).

8. The rail bottom scanning device for rail welds according to claim 1, characterized in that Magnets are respectively arranged on the bottom surface and the side surface of the body of the fixed block (2). The magnets are respectively magnetically attracted to the bottom surface of the rail (1) and the side surface of the rail waist of the rail (1).

9. The rail bottom inspection device for rail welds according to claim 1, characterized in that, Guide grooves (47) are arranged on the side wall of the body of the housing (41). The guide grooves (47) are adapted to the guide bars (48) on both side walls of the encoder (44). The guide bars (48) slide up and down in the guide grooves (47).

10. The rail weld bottom scanning device according to claim 9, characterized in that, The guide grooves (47) are adapted to the up and down sliding of the encoder (44). The coding wheel (43) in the encoder (44) always abuts against the scale (31).

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