Rotating device for ultrasonic detection water immersion probe of injector nozzle brazing seam

Abstract

The invention relates to a rotating device of an injector nozzle brazing seam ultrasonic detection water immersion probe, and belongs to the technical field of ultrasonic detection. The installation supporting plate is of a vertically-placed plate-shaped structure. The mounting platform is horizontally mounted on the side wall of the mounting support plate; the positioning core is of a cylindrical structure which is vertically arranged in the axial direction; the positioning core is arranged on the mounting platform; the movable ring module is of a cylindrical structure which is vertically arranged in the axial direction; the movable ring module is mounted on the mounting platform and is coaxially positioned below the positioning core; the probe rod axially and vertically penetrates through the positioning core and the moving ring module; the static ring module is sleeved on the outer wall of the moving ring module; the slip ring holding sleeve is sleeved on the outer wall of the static ring module; the slip ring holding sleeve is fixedly mounted on the mounting platform; the speed reducer is arranged on one side of the positioning core; the external ultrasonic probe is mounted at the bottom of the probe rod; according to the invention, traditional product rotation is replaced by probe rotation, so that the problem that the product cannot rotate and cannot be detected when the nozzle brazing seam on the injector is detected is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of ultrasonic testing, and relates to a rotating device for an ultrasonic immersion probe for detecting the brazed seam of an injector nozzle. Background Art

[0002] There are more than 300 nozzles on a certain type of injector. The nozzles are brazed to the injector housing. The brazing rate of the brazed seam is an important characteristic of the product, and it is necessary to detect the brazed seams of all nozzles. The ultrasonic immersion C-scan testing technology is the most suitable technology for detecting the brazing rate of the brazed seam. However, due to the special structure of the injector, the conventional ultrasonic immersion C-scan system is designed in a way that the product rotates and the probe does not rotate. There are multiple nozzles on this injector, and the nozzles are not at the center of the injector. It is impossible to detect the brazed seam by rotating the product. It is necessary to keep the product stationary, insert the probe into the inner cavity of the nozzle, and use the rotation of the probe for detection. Summary of the Invention

[0003] The technical problem solved by the invention is: overcoming the deficiencies of the prior art, and providing a rotating device for an ultrasonic immersion probe for detecting the brazed seam of an injector nozzle. By rotating the probe to replace the traditional rotation of the product, the problem that the product cannot be rotated and thus cannot be detected during the detection of the brazed seam of the nozzle on the injector is solved.

[0004] The technical solution adopted by the invention is:

[0005] A rotating device for an ultrasonic immersion probe for detecting the brazed seam of an injector nozzle includes a speed reducer, a probe rod, a moving ring module, a stationary ring module, a slide ring clamping sleeve, a positioning core, a mounting platform and a mounting support plate;

[0006] Among them, the mounting support plate is a vertically placed plate-like structure; the mounting platform is horizontally installed on the side wall of the mounting support plate; the positioning core is a tubular structure axially arranged vertically; the positioning core is arranged on the mounting platform; the moving ring module is a tubular structure axially arranged vertically; the moving ring module is installed on the mounting platform, and the moving ring module is coaxially located below the positioning core; the probe rod axially passes through the positioning core and the moving ring module vertically; the stationary ring module is sleeved on the outer wall of the moving ring module; the slide ring clamping sleeve is sleeved on the outer wall of the stationary ring module; the slide ring clamping sleeve is fixedly installed on the mounting platform; the speed reducer is arranged on one side of the positioning core; an external ultrasonic probe is installed at the bottom of the probe rod.

[0007] In the above-mentioned rotating device for an ultrasonic immersion probe for detecting the brazed seam of an injector nozzle, the positioning core is driven to rotate by the speed reducer; the positioning core drives the probe rod, the moving ring module and the external ultrasonic probe to rotate synchronously.

[0008] In the above-mentioned rotating device for an ultrasonic immersion probe for detecting the brazed seam of an injector nozzle, the diameter of the probe rod is 6 mm; an external ultrasonic probe is installed at the bottom of the probe rod and extends into the external nozzle for detection; the axis of the external ultrasonic probe coincides with the axis of the probe rod; during the rotation process, the horizontal change distance of the axis of the external ultrasonic probe is less than 0.2 mm.

[0009] In the above-mentioned rotating device for an ultrasonic immersion probe for detecting the brazed seam of an injector nozzle, the mounting support plate is vertically installed on the side wall of the external driving mechanism; the up and down movement of the mounting support plate is driven by the external driving mechanism.

[0010] In the above-mentioned rotating device for an ultrasonic immersion probe for detecting the brazed seam of an injector nozzle, the signal transmission between the external ultrasonic probe and the external ultrasonic system does not use a cable connection, and the external ultrasonic probe can rotate arbitrarily without cable interference.

[0011] In the above-mentioned rotating device for an ultrasonic immersion probe for detecting the brazed seam of an injector nozzle, a ring groove is provided on the outer wall of the moving ring module; mercury is filled in the ring groove.

[0012] In the above-mentioned rotating device for an ultrasonic immersion probe for detecting the brazed seam of an injector nozzle, a static ring lead is provided inside the static ring module; one end of the static ring lead extends into the mercury, and the other end of the static ring lead extends out of the static ring module and is connected to the external ultrasonic system.

[0013] In the above-mentioned rotating device for an ultrasonic immersion probe for detecting the brazed seam of an injector nozzle, the probe rod and the moving ring module can normally conduct the electrical signals generated by the external ultrasonic probe.

[0014] In the above-mentioned rotating device for an ultrasonic immersion probe for detecting the brazed seam of an injector nozzle, when it is necessary to control the external ultrasonic probe, the excitation signal generated by the external ultrasonic system is transmitted to the external ultrasonic probe through the static ring lead, mercury, moving ring module, and probe rod in sequence to realize the control of the external ultrasonic probe.

[0015] In the above-mentioned rotating device for an ultrasonic immersion probe for detecting the brazed seam of an injector nozzle, when it is necessary to collect the detection results, the electrical signals generated by the external ultrasonic probe are transmitted to the external ultrasonic system through the probe rod, moving ring module, mercury, and static ring lead in sequence.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] (1) In the present invention, the water-immersion ultrasonic probe of the device can enter the inner cavity of the nozzle. The probe is located at the center of the nozzle. When the probe rotates around its own axis, the sound wave passes through the nozzle to reach the brazed weld interface. When there is a non-welded part, the sound wave forms a strong reflection, thereby detecting the non-welded defect.

[0018] (2) During the detection of the present invention, the device rotates continuously. After rotating one week, the detection system makes a step in the Z-axis direction once until the entire brazed weld is scanned. The detection coverage rate can reach 100%. The detection result generates an ultrasonic C-scan image. By analyzing the C-scan image, the brazing rate of each brazed weld can be calculated.

[0019] (3) In the present invention, mercury is filled between the slip ring module and the stationary ring module as the conductive medium. The electrical signal generated by the ultrasonic probe is transmitted to the ultrasonic system through this mercury medium, and the excitation electrical signal of the ultrasonic system is transmitted to the probe through mercury, realizing the arbitrary rotation of the ultrasonic probe without cable interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the rotating device of the present invention;

[0021] Figure 2 is a schematic diagram of the stationary ring lead of the present invention;

[0022] Figure 3 is a schematic diagram of the slip ring clamping sleeve of the present invention;

[0023] Figure 4 is a schematic diagram of the positioning core of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] The present invention will be further described below in conjunction with embodiments.

[0025] The present invention provides a rotating device for a water-immersion probe for ultrasonic detection of a brazed weld of a injector nozzle, enabling the probe to continuously rotate along its own axis. After installing an upper-side water-immersion point-focusing probe, the sound beam can be incident vertically on the inner wall of the nozzle. During detection, when the probe is placed at the center of the nozzle, the rotating device makes the probe rotate along the axis, thereby realizing 100% detection of the brazed weld between the nozzle and the injector housing. By rotating the probe instead of the traditional rotation of the product, the problem that the product cannot be rotated and thus cannot be detected during the detection of the brazed weld of the nozzle on the injector is solved.

[0026] The rotating device for a water-immersion probe for ultrasonic detection of a brazed weld of a injector nozzle, as Figure 1 shown, specifically includes a reduction gear 1, a probe rod 2, a moving ring module 3, a stationary ring module 4, a slip ring clamping sleeve 5, a positioning core 6, a mounting platform 7, and a mounting support plate 8. Among them, the mounting support plate 8 is a vertically placed plate-like structure; the mounting platform 7 is horizontally installed on the side wall of the mounting support plate 8; the positioning core 6 is a cylindrically shaped structure axially vertically arranged, as Figure 4As shown in the figure. The positioning core 6 is arranged on the installation platform 7; the moving ring module 3 is a cylindrical structure arranged vertically in the axial direction; the moving ring module 3 is installed on the installation platform 7, and the moving ring module 3 is coaxially located below the positioning core 6; the probe rod 2 axially passes through the positioning core 6 and the moving ring module 3 vertically; the static ring module 4 is sleeved on the outer wall of the moving ring module 3. The structure of the slide ring clamping sleeve 5 is as Figure 3 shown. The slide ring clamping sleeve 5 is sleeved on the outer wall of the static ring module 4; the slide ring clamping sleeve 5 is fixedly installed on the installation platform 7; the speed reducer 1 is arranged on one side of the positioning core 6; the external ultrasonic probe is installed at the bottom of the probe rod 2.

[0027] The speed reducer 1 can be connected to the servo motor and drive the probe rod to rotate continuously 360° under the drive of the motor. The probe rod will not be affected by the cable during rotation. The device is installed on the Z-axis of the C-scan detection system through the installation support plate and can move up and down with the Z-axis.

[0028] The positioning core 6 is driven to rotate by the speed reducer 1; the positioning core 6 drives the probe rod 2, the moving ring module 3 and the external ultrasonic probe to rotate synchronously. The diameter of the probe rod 2 is 6 mm; the external ultrasonic probe installed at the bottom of the probe rod 2 extends into the external nozzle for detection; the axis of the external ultrasonic probe coincides with the axis of the probe rod 2; during the rotation process, the horizontal change distance of the axis of the external ultrasonic probe is less than 0.2 mm.

[0029] The installation support plate 8 is vertically installed on the side wall of the external drive mechanism; the up and down movement of the installation support plate 8 is driven by the external drive mechanism. The signal transmission between the external ultrasonic probe and the external ultrasonic system does not use cable connection, and the external ultrasonic probe can rotate arbitrarily without cable interference.

[0030] A ring groove is arranged at the outer wall of the moving ring module 3; mercury is filled in the ring groove; the mercury contacts the moving ring module 3 and the static ring module 4 to realize the function of conductive signal transmission. As Figure 2 shown, a static ring lead is arranged inside the static ring module 4; one end of the static ring lead extends into the mercury, and the other end of the static ring lead extends out of the static ring module 4 and is connected to the external ultrasonic system.

[0031] The probe rod 2 and the moving ring module 3 can normally conduct the electrical signals generated by the external ultrasonic probe.

[0032] When it is necessary to control the external ultrasonic probe, the excitation signal generated by the external ultrasonic system is transmitted to the external ultrasonic probe through the static ring lead, mercury, moving ring module 3, and probe rod 2 in sequence to realize the control of the external ultrasonic probe.

[0033] When it is necessary to collect the detection results, the electrical signals generated by the external ultrasonic probe are transmitted to the external ultrasonic system through the probe rod 2, moving ring module 3, mercury, and static ring lead in sequence.

[0034] The mounting support plate 8 can be mounted on the Z-axis of the C-scan detection system and move up and down with the Z-axis. A speed reducer 1 is mounted on the mounting support plate 8. The speed reducer 1 is connected to a servo motor and a moving ring module, driving the moving ring module 3 to rotate. A probe rod 2 is installed in the moving ring module 3. The probe rod 2 rotates with the moving ring module 3. An ultrasonic immersion probe is installed on the probe rod 2 to realize continuous rotation of the probe.

[0035] As an alternative embodiment of the technical solution of the present invention, the moving ring module is installed inside the static ring module. There is a ring groove on the moving ring module, which contains mercury. The mercury contacts the moving ring and the static ring to play a role in conducting electricity and transmitting signals.

[0036] As an alternative embodiment of the technical solution of the present invention, there is a ring groove on the static ring module, which is communicated with the ring groove on the moving ring module and contains mercury. The mercury contacts the moving ring and the static ring to play a role in conducting electricity and transmitting signals.

[0037] The present invention realizes that the probe can continuously rotate along its own axis. After installing an upper-side-out immersion point-focusing probe, the sound beam can be incident perpendicular to the inner wall of the nozzle. When the probe is placed at the center of the nozzle during detection, the rotating device makes the probe rotate along the axis, so as to realize 100% detection of the brazed seam between the nozzle and the injector housing. By rotating the probe instead of the traditional product rotation, the problem that the product cannot be rotated and thus cannot be detected during the detection of the brazed seam of the nozzle on the injector is solved.

[0038] Mercury is used as the conductive medium for the ultrasonic excitation and the transmission of the echo electrical signal of the probe rotating device, thus avoiding the problem that the traditional cable connection restricts the rotation of the probe, resulting in the probe being unable to rotate continuously.

[0039] The present invention can solve the problem that the brazed seam between the nozzle and the injector housing on the injector cannot be detected. Through this device, the immersion ultrasonic probe can enter the inner cavity of the nozzle. The probe is at the center of the nozzle. When the probe rotates around its own axis, the sound wave passes through the nozzle to reach the brazed seam interface. When there is a lack of welding, the sound wave forms a strong reflection, so as to detect the lack of welding defect. During detection, the device rotates continuously. After rotating one week, the Z-axis of the detection system steps once until the entire brazed seam is scanned. The detection coverage rate can reach 100%. The detection result generates an ultrasonic C-scan image. By analyzing the C-scan image, the brazing rate of each brazed seam can be calculated.

[0040] Although the present invention has been disclosed above in preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention by using the methods and technical content disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and decorations made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention all fall within the protection scope of the technical solution of the present invention.

Claims

1. A rotating device for an ultrasonic immersion probe for injector nozzle brazing seam detection, characterized in that: It comprises a reducer (1), a probe rod (2), a dynamic ring module (3), a static ring module (4), a slip ring clamping sleeve (5), a positioning core (6), a mounting platform (7) and a mounting support plate (8); The mounting support plate (8) is a plate-like structure placed vertically; the mounting platform (7) is horizontally mounted on the side wall of the mounting support plate (8); the positioning core (6) is a cylindrical structure arranged axially vertically; the positioning core (6) is arranged on the mounting platform (7); the dynamic ring module (3) is a cylindrical structure arranged axially vertically; the dynamic ring module (3) is mounted on the mounting platform (7), and the dynamic ring module (3) is coaxially located below the positioning core (6); the probe rod (2) vertically passes through the positioning core (6) and the dynamic ring module (3); the static ring module (4) is sleeved on the outer wall of the dynamic ring module (3); the slip ring clamping sleeve (5) is sleeved on the outer wall of the static ring module (4); the slip ring clamping sleeve (5) is fixedly mounted on the mounting platform (7); the reducer (1) is arranged on one side of the positioning core (6); and the external ultrasonic probe is mounted at the bottom of the probe rod (2).

2. The rotating device of the ultrasonic detection water immersion probe for the brazing seam of the injector nozzle according to claim 1 is characterized by: The positioning core (6) is driven to rotate by the reducer (1); the positioning core (6) drives the probe rod (2), the dynamic ring module (3) and the external ultrasonic probe to rotate synchronously.

3. The rotating device of the ultrasonic detection water immersion probe for the brazing seam of the injector nozzle according to claim 2 is characterized by: The diameter of the probe rod (2) is 6 mm; an external ultrasonic probe is installed at the bottom of the probe rod (2) and extends into the interior of the external nozzle to realize detection; the axis of the external ultrasonic probe coincides with the axis of the probe rod (2); during the rotation process, the horizontal change distance of the axis of the external ultrasonic probe is less than 0.2 mm.

4. The rotating device of the ultrasonic detection water immersion probe for the brazing seam of the injector nozzle according to claim 2 is characterized by: The mounting support plate (8) is vertically mounted on the side wall of the external driving mechanism; the mounting support plate (8) is driven to move up and down by the external driving mechanism.

5. The rotating device of the ultrasonic detection water immersion probe for the brazing seam of the injector nozzle according to claim 2, characterized in that: The signal transmission between the external ultrasonic probe and the external ultrasonic system does not use a cable connection, and the external ultrasonic probe can be rotated arbitrarily without causing interference from the cable.

6. The rotating device of the ultrasonic detection water immersion probe for the brazing seam of the injector nozzle according to claim 5, characterized in that: An annular groove is provided on the outer wall of the dynamic ring module (3); the annular groove is filled with mercury; the mercury is in contact with the dynamic ring module (3) and the static ring module (4) to achieve the function of conducting and transmitting signals.

7. The rotating device of the ultrasonic detection water immersion probe for the brazing seam of the injector nozzle according to claim 6, characterized in that: A static ring lead is arranged inside the static ring module (4); one end of the static ring lead extends into the mercury, and the other end of the static ring lead extends out of the static ring module (4) to be connected to an external ultrasonic system.

8. The rotating device of the ultrasonic detection water immersion probe for the brazing seam of the injector nozzle according to claim 7, characterized in that: The probe rod (2) and the dynamic ring module (3) realize normal transmission of the electrical signal generated by the external ultrasonic probe.

9. The rotating device of the ultrasonic detection water immersion probe for the brazing seam of the injector nozzle according to claim 8, characterized in that: When the external ultrasonic probe needs to be controlled, the excitation signal generated by the external ultrasonic system is transmitted to the external ultrasonic probe via the static ring lead, mercury, the dynamic ring module (3), and the probe rod (2) in sequence, thereby realizing the control of the external ultrasonic probe.

10. The rotating device of the ultrasonic detection water immersion probe for the brazing seam of the injector nozzle according to claim 8, characterized in that: When it is necessary to collect the test results, the electrical signal generated by the external ultrasonic probe is transmitted to the external ultrasonic system via the probe rod (2), the dynamic ring module (3), mercury, and the static ring lead in sequence.

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