Precise valve surface defect detection device

Abstract

The invention relates to the technical field of ultrasonic detection, and provides a precise valve surface defect detection device which comprises a detection frame, a surface defect detection system, an adjusting mechanism, a rotating mechanism and a clamping tool. Not only can the spraying work of a coupling agent be automatically completed according to the inner diameter or outer diameter of a pipe orifice or a valve on one side of a valve body, but also the ultrasonic detection probe module can be automatically controlled to intermittently do arc-shaped movement-radial movement-arc-shaped movement-radial movement along the pipe orifice or the inner side of the valve along the pipe orifice or the outer side of the valve; compared with a traditional mode of manually holding a probe for detection, the device has the advantages that the moving track of the probe is uniform, stable and accurate, and the accuracy of a defect detection result is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic testing, and in particular to a precision valve body surface defect detection device. Background Art

[0002] After the precision valve body is manufactured, its surface needs to be inspected to detect whether there are surface defects such as leaking welding, defects, voids, cracks, etc. on the surface of the precision valve body. The instrument generally used for precision valve bodies is an ultrasonic detector. The ultrasonic detector detects the ultrasonic signal generated by partial discharge, converts the frequency, and converts the ultrasonic signal into a sound audible to the human ear and a displayed value to find the partial discharge point and eliminate hidden dangers. The characteristics of partial discharge sounds of different natures are different, so the difference in sound can be used to determine what kind of partial discharge fault it is. The intensity of partial discharge can be quantified by the size of the value. Ultrasonic waves are directional and can locate partial discharge points.

[0003] When using an ultrasonic detector for surface defect detection, it is generally necessary to first apply a coupling agent to the surface of the precision valve body, and then manually slide the ultrasonic probe on the surface of the area to be tested to obtain signal data and detection result information.

[0004] The existing operating method of using a manual handheld ultrasonic probe to detect precision valve bodies still has the following defects: on the one hand, when the number of precision valve bodies is large, the manual detection method is inefficient and is not suitable for large-scale mass production of precision valve bodies; on the other hand, the surface features of the precision valve bodies are complex, especially the pipe orifices or valves where the surface of the precision valve body is connected to the pipeline. The manually operated ultrasonic probe cannot automatically detect along the end face of the pipe orifice or valve evenly, stably and accurately, and thus cannot efficiently obtain accurate detection results. Summary of the invention

[0005] The purpose of the present invention is to provide a precision valve body surface defect detection device, aiming to solve the problems existing when using an existing precision valve body surface defect detection device.

[0006] To achieve the above object, the present invention provides the following technical solution: a precision valve body surface defect detection device, comprising a detection frame and a clamping tool, wherein the surface of the detection frame is provided with a fixing rod, a workbench and a crossbeam, and the clamping tool is installed on the surface of the workbench, and further comprising: A surface flaw detection system, comprising a telescopic member, a substrate, an ultrasonic detection probe module, a laser ranging sensor and a CCD camera module, wherein the ultrasonic detection probe module, the laser ranging sensor and the CCD camera module are all fixedly connected to the same side of the substrate, and the telescopic member is fixedly connected to the other side of the substrate; An adjusting mechanism, the adjusting mechanism comprising a screw, a first driving motor, a nut seat, a rotating shaft, a first support, a bent pipe, a sleeve and a coupling agent nozzle, the first driving motor is connected to the end of the screw, the nut seat is threadedly connected to the screw, one end of the rotating shaft is rotatably connected to the nut seat, the first support is fixedly connected to the other end of the rotating shaft, one end of the bent pipe is fixedly connected to the first support, a sleeve is provided at a position of the bent pipe close to the first support, the sleeve is movably sleeved on the surface of the fixed rod, the telescopic member is provided on one side of the bent pipe, the coupling agent nozzle is communicated with the bent pipe, and the substrate is fixedly connected to the coupling agent nozzle; The rotating mechanism includes a guide rail, a driving unit and a rotating tube. The guide rail is fixedly connected to the rotating tube, the rotating tube is rotatably connected to the surface of the beam, the driving unit is fixedly connected to the beam, the rotating tube is transmission-connected to the driving unit, and the screw, the first driving motor and the nut seat are all located in the guide rail.

[0007] As a further solution of the present invention, it also includes a coupling agent delivery part, which includes a liquid pump, a rigid delivery pipe and a flexible delivery pipe. The liquid pump is fixedly connected to the surface of the beam, one end of the rigid delivery pipe is fixedly connected to the liquid pump, the rotating tube is movably connected to the other end of the rigid delivery pipe, one end of the flexible delivery pipe is fixedly connected to the surface of the rotating tube, and one end of the bent pipe away from the coupling agent nozzle is fixedly connected to the other end of the delivery pipe.

[0008] As a further solution of the present invention, the adjustment mechanism also includes a second support, a fixed plate, a Y-shaped tube and a flexible tube. The second support and the fixed plate are both fixedly connected to the surface of the bent pipe, the sleeve is fixedly connected to the second support, the telescopic member is fixedly connected to the fixed plate, the Y-shaped tube is fixedly connected to the end of the bent pipe, and the flexible tube is connected between the Y-shaped tube and the coupling agent nozzle.

[0009] As a further solution of the present invention, the maximum distances between the coupling agent nozzle, the laser ranging sensor and the CCD camera module and the substrate are respectively smaller than the maximum distance between the ultrasonic detection probe module and the substrate.

[0010] As a further solution of the present invention, the clamping tool includes a rotating table, a clamp, a driving motor and a central axis. The rotating table is fixedly connected to the central axis, the central axis is rotatably connected to the surface of the worktable, the driving motor is fixedly connected to the worktable, and the central axis is connected to the driving motor. The three are symmetrically connected on the surface of the rotating table.

[0011] As a further solution of the present invention, the rotating mechanism also includes a transmission gear, the rotating tube is fixedly connected to the transmission gear, the driving part includes a second driving motor and a driving gear, the second driving motor is connected to the driving gear, and the transmission gear is transmission-connected to the driving gear.

[0012] As a further solution of the present invention, it also includes a computer control platform, which is installed on the surface of the detection frame. The telescopic member, the first drive motor, the drive unit, the ultrasonic detection probe module, the laser ranging sensor and the CCD camera module are all communicatively connected to the computer control platform.

[0013] The beneficial effects of the present invention are as follows: the present application utilizes a structural design that cooperates with a fixed rod, a surface flaw detection system, an adjustment mechanism, a rotating mechanism and a clamping tool, which can not only automatically complete the spraying of the coupling agent according to the inner diameter or outer diameter size of the pipe mouth or valve on one side of the valve body, but also can automatically control the ultrasonic detection probe module to intermittently perform arc motion along the outside of the pipe mouth or valve - radial motion - arc motion along the inside of the pipe mouth or valve - radial motion, until a closed motion trajectory is formed to complete a comprehensive detection of the pipe mouth or valve end face. Compared with the traditional manual handheld probe detection method, the probe operation trajectory is uniform, stable and precise, which improves the accuracy of the defect detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of a precision valve body surface defect detection device according to an embodiment of the present invention.

[0015] Figure 2 An exploded view of a precision valve body surface defect detection device according to an embodiment of the present invention.

[0016] Figure 3 It is a three-dimensional diagram of a surface flaw detection system according to an embodiment of the present invention.

[0017] Figure 4 It is a three-dimensional diagram of the adjustment mechanism according to an embodiment of the present invention.

[0018] Figure 5 It is a three-dimensional diagram of the rotating mechanism according to an embodiment of the present invention.

[0019] Figure 6 It is an assembly diagram of the surface flaw detection system, the adjustment mechanism, the rotation mechanism and the coupling agent delivery part of the embodiment of the present invention.

[0020] Figure 7 It is a three-dimensional diagram of a clamping tool according to an embodiment of the present invention.

[0021] Figure 8 The figure is a side view of a precision valve body surface defect detection device according to an embodiment of the present invention.

[0022] Fig. 9 For the present invention Figure 8 A partial enlarged view of point a in the middle.

[0023] Fig.10 This is a motion trajectory diagram of the ultrasonic detection probe module according to an embodiment of the present invention.

[0024] Figure numerals: 1-detection frame, 11-fixed rod, 12-workbench, 13-crossbeam, 2-surface flaw detection system, 21-telescopic member, 22-substrate, 23-ultrasonic detection probe module, 24-laser ranging sensor, 25-CCD camera module, 3-adjustment mechanism, 31-screw, 32-first drive motor, 33-nut seat, 331-rotating shaft, 332-first support, 34-bend pipe, 35-second support, 351 - sleeve, 36-fixed plate, 37-coupling agent nozzle, 38-Y-shaped tube, 39-flexible tube, 4-rotation mechanism, 41-guide rail, 42-driving unit, 43-rotating tube, 44-transmission gear, 5-clamping tool, 51-rotating table, 52-clamp, 53-driving motor, 54-central axis, 6-coupling agent delivery unit, 61-liquid pump, 62-rigid delivery tube, 63-flexible delivery tube, 7-computer control platform, 8-valve body. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0027] See also Figures 1 to 10 In one embodiment of the present invention, a precision valve body surface defect detection device includes a detection frame 1 and a clamping tool 5, wherein the detection frame 1 is provided with a fixing rod 11, a workbench 12 and a crossbeam 13, and the clamping tool 5 is installed on the surface of the workbench 12, and further includes: A surface flaw detection system 2, the surface flaw detection system 2 comprising a telescopic member 21, a substrate 22, an ultrasonic detection probe module 23, a laser ranging sensor 24 and a CCD camera module 25, wherein the ultrasonic detection probe module 23, the laser ranging sensor 24 and the CCD camera module 25 are all fixedly connected to the same side of the substrate 22, and the telescopic member 21 is fixedly connected to the other side of the substrate 22; The adjusting mechanism 3 includes a screw 31, a first driving motor 32, a nut seat 33, a rotating shaft 331, a first support 332, a curved pipe 34, a sleeve 351 and a coupling agent nozzle 37. The first driving motor 32 is connected to the end of the screw 31, the nut seat 33 is threadedly connected to the screw 31, one end of the rotating shaft 331 is rotatably connected to the nut seat 33, the first support 332 is fixedly connected to the other end of the rotating shaft 331, one end of the curved pipe 34 is fixedly connected to the first support 332, a sleeve 351 is provided at a position of the curved pipe 34 close to the first support 332, the sleeve 351 is movably sleeved on the surface of the fixed rod 11, the telescopic member 21 is provided on one side of the curved pipe 34, the coupling agent nozzle 37 is communicated with the curved pipe 34, and the substrate 22 is fixedly connected to the coupling agent nozzle 37; The rotating mechanism 4 includes a guide rail 41, a driving unit 42 and a rotating tube 43. The guide rail 41 is fixedly connected to the rotating tube 43. The rotating tube 43 is rotatably connected to the surface of the beam 13. The driving unit 42 is fixedly connected to the beam 13. The rotating tube 43 is transmission-connected to the driving unit 42. The screw 31, the first driving motor 32 and the nut seat 33 are all located in the guide rail 41.

[0028] See also Fig. 9 Furthermore, the maximum distances between the coupling agent nozzle 37, the laser ranging sensor 24 and the CCD camera module 25 and the substrate 22 are respectively smaller than the maximum distance between the ultrasonic detection probe module 23 and the substrate 22. When the ultrasonic detection probe module 23 is attached to the workpiece to be tested, the coupling agent nozzle 37, the laser ranging sensor 24 and the CCD camera module 25 are prevented from touching the workpiece to be tested.

[0029] See also Figure 7 and Figure 8 Furthermore, the clamping tool 5 includes a rotating table 51, a clamp 52, a driving motor 53 and a center shaft 54. The rotating table 51 is fixedly connected to the center shaft 54, and the center shaft 54 ​​is rotatably connected to the surface of the workbench 12. The driving motor 53 is fixedly connected to the workbench 12, and the center shaft 54 ​​is connected to the driving motor 53. The three are symmetrically connected on the surface of the rotating table 51.

[0030] See also Figure 5 and Figure 6 Furthermore, the rotating mechanism 4 also includes a transmission gear 44, the rotating tube 43 is fixedly connected to the transmission gear 44, the driving part 42 includes a second driving motor and a driving gear, the second driving motor is connected to the driving gear, and the transmission gear 44 is transmission-connected to the driving gear.

[0031] See also Figure 1Furthermore, it also includes a computer control platform 7, which is installed on the surface of the detection frame 1, and the telescopic member 21, the first driving motor 32, the driving unit 42, the ultrasonic detection probe module 23, the laser ranging sensor 24 and the CCD camera module 25 are all communicatively connected to the computer control platform 7.

[0032] In the embodiment of the present invention, the computer control platform 7 stores the dimension data of the valve body 8 to be tested.

[0033] See also Figure 6 In one embodiment of the present invention, a coupling agent delivery unit 6 is further included, wherein the coupling agent delivery unit 6 includes a liquid pump 61, a rigid delivery pipe 62 and a flexible delivery pipe 63. The liquid pump 61 is fixedly connected to the surface of the cross beam 13, one end of the rigid delivery pipe 62 is fixedly connected to the liquid pump 61, the rotating tube 43 is movably connected to the other end of the rigid delivery pipe 62, one end of the flexible delivery pipe 63 is fixedly connected to the surface of the rotating tube 43, and one end of the bent pipe 34 away from the coupling agent nozzle 37 is fixedly connected to the other end of the delivery pipe 63.

[0034] See also Figure 4 and Figure 6 Furthermore, the adjustment mechanism 3 also includes a second support 35, a fixed plate 36, a Y-shaped tube 38 and a flexible tube 39. The second support 35 and the fixed plate 36 are both fixedly connected to the surface of the curved tube 34, the sleeve 351 is fixedly connected to the second support 35, the telescopic member 21 is fixedly connected to the fixed plate 36, the Y-shaped tube 38 is fixedly connected to the end of the curved tube 34, and the flexible tube 39 is connected between the Y-shaped tube 38 and the coupling agent nozzle 37.

[0035] In the embodiment of the present invention, the telescopic member 21 is an electric telescopic rod.

[0036] Working principle: During the inspection, the valve body 8 is first placed on the surface of the rotating table 51 , and then fixed at the center of the circular rotating table 51 using three sets of clamps 52 to fix the center of the valve body 8 .

[0037] When it is necessary to perform flaw detection on the pipe opening or the end face or the connecting face of the valve on one side of the valve body 8, the driving unit 42 is first used to control the guide rail 41 to rotate to a vertical state with the rotating tube 43 as the axis. Since the nut seat 33 and the first support 332 are connected by the rotating shaft 331, and the sleeve 351 is horizontally limited by the fixed rod 11, when the initial position of the surface flaw detection system 2 is fixed, the movement trajectories of the ultrasonic detection probe module 23 and the coupling agent nozzle 37 that move along the fixed rod 11 (lateral) direction and the sleeve 351 (longitudinal) direction are concentric circles, and the distance between the nut seat 33 and the axis of the rotating tube 43 is the diameter of the circular trajectory.

[0038] Based on the above principle, the rotating table 51 is continuously controlled to rotate around the central axis 54 through the driving motor 53, so that the pipe mouth or valve of the valve body 8 corresponds to the position of the ultrasonic detection probe module 23, and then the first driving motor 32 controls the nut seat 33 and the curved pipe 34 to move longitudinally through the screw 31, so as to adjust the longitudinal position of the ultrasonic detection probe module 23. When the CCD camera module 25 captures the end face of the pipe mouth or valve and the ultrasonic detection probe module 23 aligned, it stops, and then the telescopic member 21 controls the ultrasonic detection probe module 23 to move toward the end face of the pipe mouth or valve through the substrate 22, and the laser ranging sensor 24 It is used to monitor the real-time distance between the coupling agent nozzle 37 and the end face of the pipe orifice or the valve, and stops when the coupling agent nozzle 37 is 5 cm-10 cm away from the end face of the pipe orifice or the valve. Then, the first driving motor 32 controls the guide rail 41 and the nut seat 33 to rotate 360 ​​degrees around the rotating shaft 331, so that the coupling agent nozzle 37 rotates 360 degrees around the axis of the pipe orifice or the valve. During this process, the liquid pump 61 sprays the coupling agent through the rigid delivery pipe 62, the rotating pipe 43, the flexible delivery pipe 63, the bent pipe 34, the Y-shaped pipe 38, the flexible pipe 39 and the coupling agent nozzle 37, so that the coupling agent is evenly sprayed on the pipe orifice or the valve end face.

[0039] Please see attached Fig.10 Then, the telescopic member 21 is used to control the ultrasonic detection probe module 23 to continue moving. When the laser ranging sensor 24 detects that the ultrasonic detection probe module 23 is in contact with the pipe mouth or the valve end face, it stops. Since the outer diameter and inner diameter of the pipe mouth or the valve are known and stored in the computer control platform 7, during detection, the first driving motor 32 and the screw 31 are first used to move the geometric center of the ultrasonic detection probe module 23 to a position close to the outer boundary of the pipe mouth or the valve end face, and then the first driving motor 32 is used to control the guide rail 41, the nut seat 33 and the ultrasonic detection probe module 23 to rotate around the rotating shaft 331 while detecting. When rotating 90 degrees, the first driving motor 32 and the screw 31 are used again to move the geometric center of the ultrasonic detection probe module 23 to a position close to the inner boundary of the pipe mouth or the valve end face. This cycle is repeated until the ultrasonic detection probe module 23 is rotated 360 degrees and the detection is completed. The detection curve data and detection result information are obtained through the computer control platform 7.

[0040] When it is necessary to perform longitudinal or transverse detection on the surface of the valve body 8, the driving unit 42 is first used to control the guide rail 41 to rotate to a vertical state or a horizontal state with the rotating tube 43 as the axis, and then the telescopic member 21 is used to adjust the positions of the coupling agent nozzle 37 and the ultrasonic detection probe module 23 according to the surface position or size of the valve body 8. After the coupling agent is sprayed, the first driving motor 32 and the screw 31 are used to control the ultrasonic detection probe module 23 to move and detect along the sleeve 351 or the fixed rod 11, thereby realizing the automatic completion of the comprehensive detection function of the surface of the valve body 8.

[0041] To summarize, the present application utilizes a structural design that cooperates with a fixed rod 11, a surface flaw detection system 2, an adjustment mechanism 3, a rotating mechanism 4 and a clamping tool 5, which can not only automatically complete the spraying of the coupling agent according to the inner diameter or outer diameter of the pipe mouth or valve on one side of the valve body 8, but also automatically control the ultrasonic detection probe module 23 to intermittently perform arc motion along the outside of the pipe mouth or valve - radial motion - arc motion along the inside of the pipe mouth or valve - radial motion, until a closed motion trajectory is formed to complete a comprehensive detection of the pipe mouth or valve end face. Compared with the traditional manual handheld probe detection method, the probe operation trajectory is uniform, stable and precise, which improves the accuracy of the defect detection results.

[0042] For those skilled in the art, although several embodiments and examples of the present invention are described, these embodiments and examples are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the subject matter of the invention. These embodiments and their variations are included in the scope and subject matter of the invention, and are included in the invention described in the claims and the scope of their equivalents.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A precision valve body surface defect detection device, comprising a detection frame (1) and a clamping tool (5), wherein the surface of the detection frame (1) is provided with a fixing rod (11), a workbench (12) and a crossbeam (13), and the clamping tool (5) is installed on the surface of the workbench (12), characterized in that: Also includes: A surface flaw detection system (2), the surface flaw detection system (2) comprising a telescopic member (21), a substrate (22), an ultrasonic detection probe module (23), a laser distance sensor (24) and a CCD camera module (25), wherein the ultrasonic detection probe module (23), the laser distance sensor (24) and the CCD camera module (25) are all fixedly connected to the same side of the substrate (22), and the telescopic member (21) is fixedly connected to the other side of the substrate (22); The adjusting mechanism (3) comprises a screw (31), a first driving motor (32), a nut seat (33), a rotating shaft (331), a first support (332), a bent pipe (34), a sleeve (351) and a coupling agent nozzle (37), wherein the first driving motor (32) is connected to the end of the screw (31), the nut seat (33) is threadedly connected to the screw (31), one end of the rotating shaft (331) is rotatably connected to the nut seat (33), and the first support (3 The first support (332) is fixedly connected to the other end of the rotating shaft (331), one end of the curved pipe (34) is fixedly connected to the first support (332), a sleeve (351) is arranged at a position of the curved pipe (34) close to the first support (332), the sleeve (351) is movably sleeved on the surface of the fixed rod (11), the telescopic member (21) is arranged on one side of the curved pipe (34), the coupling agent nozzle (37) is connected to the curved pipe (34), and the base plate (22) is fixedly connected to the coupling agent nozzle (37); A rotating mechanism (4), the rotating mechanism (4) comprising a guide rail (41), a driving unit (42) and a rotating tube (43), the guide rail (41) being fixedly connected to the rotating tube (43), the rotating tube (43) being rotatably connected to the surface of a cross beam (13), the driving unit (42) being fixedly connected to the cross beam (13), the rotating tube (43) being transmission-connected to the driving unit (42), and the screw rod (31), the first driving motor (32) and the nut seat (33) being all located in the guide rail (41).

2. A precision valve body surface defect detection device according to claim 1, characterized in that: The coupling agent delivery part (6) further comprises a coupling agent delivery part (6), the coupling agent delivery part (6) comprising a liquid pump (61), a rigid delivery pipe (62) and a flexible delivery pipe (63), the liquid pump (61) being fixedly connected to the surface of the cross beam (13), one end of the rigid delivery pipe (62) being fixedly connected to the liquid pump (61), the rotating pipe (43) being movably connected to the other end of the rigid delivery pipe (62), one end of the flexible delivery pipe (63) being fixedly connected to the surface of the rotating pipe (43), and one end of the bent pipe (34) being away from the coupling agent nozzle (37) being fixedly connected to the other end of the delivery pipe (63).

3. A precision valve body surface defect detection device according to claim 2, characterized in that: The adjustment mechanism (3) further comprises a second support (35), a fixing plate (36), a Y-shaped tube (38) and a flexible tube (39); the second support (35) and the fixing plate (36) are both fixedly connected to the surface of the curved tube (34); the sleeve (351) is fixedly connected to the second support (35); the telescopic member (21) is fixedly connected to the fixing plate (36); the Y-shaped tube (38) is fixedly connected to the end of the curved tube (34); and the flexible tube (39) is connected between the Y-shaped tube (38) and the coupling agent nozzle (37).

4. A precision valve body surface defect detection device according to claim 1, characterized in that: The maximum distances between the coupling agent nozzle (37), the laser distance measuring sensor (24) and the CCD camera module (25) and the substrate (22) are all smaller than the maximum distance between the ultrasonic detection probe module (23) and the substrate (22).

5. The device for detecting surface defects of a precision valve body according to claim 1, characterized in that: The clamping tool (5) comprises a rotating table (51), a clamp (52), a driving motor (53) and a central axis (54); the rotating table (51) is fixedly connected to the central axis (54); the central axis (54) is rotatably connected to the surface of the workbench (12); the driving motor (53) is fixedly connected to the workbench (12); the central axis (54) is connected to the driving motor (53); and the three are symmetrically connected to the surface of the rotating table (51).

6. A precision valve body surface defect detection device according to claim 1, characterized in that: The rotating mechanism (4) further comprises a transmission gear (44), the rotating tube (43) is fixedly connected to the transmission gear (44), the driving part (42) comprises a second driving motor and a driving gear, the second driving motor is connected to the driving gear, and the transmission gear (44) is transmission-connected to the driving gear.

7. A precision valve body surface defect detection device according to claim 2, characterized in that: The invention also comprises a computer control platform (7), wherein the computer control platform (7) is mounted on the surface of the detection frame (1), and the telescopic member (21), the first drive motor (32), the drive unit (42), the ultrasonic detection probe module (23), the laser distance measuring sensor (24) and the CCD camera module (25) are all connected to the computer control platform (7) in communication.

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