Double-shaft mechanism for underwater ultrasonic flaw detection equipment

Abstract

The utility model relates to the technical field of underwater ultrasonic flaw detection equipment, in particular to a double-shaft mechanism for underwater ultrasonic flaw detection equipment. The A-axis driving device comprises a driving motor A, a motor output shaft A, an A-axis speed reducer and an A-axis right-angle speed reducer which are connected in sequence; the B-axis driving device comprises a driving motor B, a motor output shaft B and a B-axis right-angle speed reducer which are connected in sequence; the A-axis driving device and the B-axis driving device are connected through a connecting flange, and the probe seat is installed on an output shaft of the B-axis right-angle speed reducer through a fastener. The driving motor A operates to drive the connecting flange to rotate, the B-axis driving device integrally and synchronously rotates, and meanwhile, the driving motor B independently operates to drive the B-axis right-angle speed reducer to adjust the angle of the probe seat. According to the utility model, the probe is controlled to freely move underwater for positioning through dual-drive, so that the time consumed by personnel for positioning is saved, and accuracy, rapidness and convenience are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater ultrasonic flaw detection equipment, in particular to a double-axis mechanism used for underwater ultrasonic flaw detection equipment. Background Art

[0002] In recent years, with the quality requirements for various new materials, many flaw detection equipment has been produced. During the flaw detection process, the probe needs to be perpendicular to the material surface to obtain the most ideal waveform. At present, personnel manually adjust the probe and test it repeatedly to make the probe meet the flaw detection requirements. Ultrasonic probes require water as a coupling agent to detect materials. Operators may wade in water, which makes adjustment more difficult. This method is too cumbersome and time-consuming, and manual control is often unable to accurately adjust and freeze in the best position.

[0003] The existing Chinese patent with publication number CN202974951U discloses an ultrasonic automatic detection system, in which the probe adjustment device includes mutually perpendicular X-axis, Y-axis and longitudinal rod guide rails and sliders. The computer connects the ultrasonic flaw detection card and the synchronous control circuit, and the servo motors of the X-axis, Y-axis and longitudinal rod control the three-degree-of-freedom movement of the probe holder. The patented probe positioning is fast, accurate and convenient.

[0004] The above technology has the following defects: This patent adopts a three-drive mechanism to solve the problem of automatic flaw detection. In order to promote technological progress, the applicant further develops the technology of automatic flaw detection using a dual-drive mechanism. Utility Model Content

[0005] The utility model aims to provide a dual-axis mechanism for underwater ultrasonic flaw detection equipment to solve the problems existing in the prior art.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a dual-axis mechanism for underwater ultrasonic flaw detection equipment, including a probe seat and dual drives: an A-axis drive device and a B-axis drive device; the A-axis drive device includes a drive motor A, a motor output shaft A, an A-axis reducer and an A-axis right-angle reducer connected in sequence, and the B-axis drive device includes a drive motor B, a motor output shaft B and a B-axis right-angle reducer connected in sequence; the A-axis drive device and the B-axis drive device are connected by a connecting flange, and the probe seat is installed on the output shaft of the B-axis right-angle reducer by fasteners.

[0007] Furthermore, the A-axis driving device and the B-axis driving device are both assembled and fastened with a double-layer aluminum alloy shell on the outside, and are sealed inside with a rubber O-ring and fasteners.

[0008] Furthermore, the output shaft of the A-axis right-angle reducer passes through the aluminum alloy housing and fixes the lip seal ring through an elastic retaining ring installed in the hole; the output shaft of the B-axis right-angle reducer fixes the lip seal ring through an elastic retaining ring installed in the hole, extends out of the housing and connects with the probe seat.

[0009] Furthermore, a sensor sheet 1 is provided on the connecting flange, and two limit sensors 1 are installed on the aluminum alloy housing of the A-axis driving device. The sensor sheet 1 provides a position signal of the connecting flange to the two limit sensors 1.

[0010] Furthermore, a second induction plate is provided on the output shaft of the B-axis right-angle reducer, and two second limit sensors are installed on the aluminum alloy shell of the B-axis drive device. The second induction plate provides the position signal of the output shaft of the B-axis right-angle reducer to the two second limit sensors.

[0011] Furthermore, the limit sensor 1 and the limit sensor 2 are both installed through the holes of the aluminum alloy shell, reinforced with double nuts, rubber sealing washers are placed inside and outside the nuts, and sealant is injected into the holes to form a sealant layer.

[0012] Furthermore, air pipes are fixed inside the A-axis driving device and the B-axis driving device, and the air pipes are connected to an external air pump.

[0013] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0014] 1. The utility model controls the probe to move freely underwater through a dual drive mechanism to vertically locate the material, saving the time consumed by personnel in positioning, and is accurate, fast and convenient;

[0015] 2. The utility model forms a closed protection by integrating the A-axis drive device and the B-axis drive device into a sealed container, respectively, sealing the output shaft of the A-axis and B-axis right-angle reducer, and arranging an air pipe in the overall container, so as to ensure that when the dual drive mechanism works underwater, water cannot intrude into the internal electrical equipment such as the drive motor A and the drive motor B, thereby effectively preventing the equipment from being damaged due to water ingress;

[0016] 3. The utility model adopts a specific waterproof sealing technology for the limit sensor to extend the service life of the precision instrument, ensure the long-term operation of the dual drive mechanism underwater, and reduce the number of maintenance times;

[0017] 4. The modular design of the A-axis drive device and the B-axis drive device of the utility model can realize quick installation and replacement;

[0018] 5. The utility model uses a program to control the drive motor A and the drive motor B, and the operator does not need to perform tedious and time-consuming repeated detection and debugging, thereby improving the precision and accuracy of debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 is a schematic structural diagram of the dual-axis mechanism of Example 1;

[0021] Figure 2 It is a schematic diagram for showing the structure of the sensor and the limit sensor exposed from the outer shell in Example 1;

[0022] Figure 3 is a schematic structural diagram of the A-axis driving device in Example 1;

[0023] Figure 4 It is a schematic diagram of the structure of the B-axis driving device in Example 1.

[0024] In the figure, 1. A-axis drive device; 2. Rubber O-ring; 3. Drive motor A; 4. A-axis reducer; 5. A-axis right-angle reducer; 6. Lip seal; 7. Elastic retaining ring; 8. Limit sensor 1; 9. Induction plate 1; 10. Aluminum alloy housing; 11. Connecting flange; 12. Wiring tube; 13. AB axis tube; 14. B-axis drive device; 15. Drive motor B; 16. B-axis right-angle reducer; 17. Induction plate 2; 18. Limit sensor 2; 19. Air pipe; 20. Probe seat. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] like Figure 1 - Figure 4As shown, this embodiment 1 discloses a dual-axis mechanism for underwater ultrasonic flaw detection equipment, which is mainly composed of three core components, namely, an A-axis drive device 1, a B-axis drive device 14, and a probe seat 20. The top of the A-axis drive device 1 is equipped with a drive motor A 3, and the motor output shaft A of the drive motor A 3 transmits power through the A-axis reducer A4 and the A-axis right-angle reducer 5 in turn. The top of the B-axis drive device 14 is equipped with a drive motor B 15, and the motor output shaft B of the drive motor B 15 is connected to the B-axis right-angle reducer 16, and the end of the output shaft of the B-axis right-angle reducer 16 is installed with the probe seat 20 through a fastener. The end of the output shaft of the A-axis right-angle reducer 5 is connected to the housing of the B-axis drive device 14 through a precisely designed connecting flange 11. The drive motor A3 runs, thereby driving the connecting flange 11 to rotate, driving the B-axis drive device 14 to rotate synchronously as a whole, and at the same time, the drive motor B 15 is independently operated to drive the B-axis right-angle reducer 16 to adjust the angle of the probe seat 20.

[0028] The A-axis drive device 1 and the B-axis drive device 14 are both assembled and fastened with a double-layer aluminum alloy housing 10, and the interior is effectively sealed by a rubber O-ring 2 and fasteners to ensure the waterproof performance of the overall structure.

[0029] Among them, the output shaft of the A-axis right-angle reducer 5 passes through the aluminum alloy housing 10, and the lip seal ring 6 is fixed by the elastic circlip 7 installed in the hole; the output shaft of the B-axis right-angle reducer 16 passes through the aluminum alloy housing 10, and the lip seal ring 6 is fixed by the elastic circlip 7 installed in the hole. The elastic circlip 7 and the lip seal ring 6 can achieve excellent sealing effect while ensuring the rotation of the output shaft of the reducer.

[0030] Among them, a sensor sheet 19 is installed on the connection flange 11 connecting the A-axis drive device 1 and the B-axis drive device 14, and two limit sensors 18 are installed on the aluminum alloy shell. The sensor sheet 19 provides the position signal of the connection flange 11 to the two limit sensors 18. A sensor sheet 2 17 is installed on the output shaft of the B-axis right-angle reducer 16, and two limit sensors 2 18 are installed on the double-layer aluminum alloy shell 10 of the B-axis drive device 14. The sensor sheet 2 17 provides the position signal of the output shaft of the B-axis right-angle reducer 16 to the two limit sensors 2 18. The two limit sensors 1 8 and the two limit sensors 2 18 are installed through the special holes preset in the aluminum alloy shell 10, reinforced with double nuts, and rubber sealing gaskets are placed inside and outside the nuts to ensure sealing. After the installation is completed, the holes are injected with sealant to form a sealant layer to strengthen the sealing and waterproof measures, so that the limit sensors 1 8 and 2 18 have good sealing and stability, and extend the service life.

[0031] In addition, air pipes 19 are fixed inside the A-axis drive device 1 and the B-axis drive device 14, respectively. The air pipes 19 are connected to an air pump, and the air pump is used to inflate the internal air pipes 19, thereby forming a closed protection for the A-axis drive device 1 and the B-axis drive device 14. The air pipe 19 of the A-axis drive device 1 passes through the AB axis tube 13 fixed to the aluminum alloy housing 10 together with the power line of the drive motor A3 and the signal line of the limit sensor 8, and finally enters the wiring tube 12. The arrangement of the air pipe 19 of the B-axis drive device 14 is similar to that of the air pipe 19 of the A-axis drive device 1.

[0032] The operating principle of this embodiment is as follows:

[0033] The staff uses program control to control the operation of the drive motor A 3, thereby driving the connecting flange 11 connected thereto to rotate. Since the B-axis drive device 14 is connected to the connecting flange 11, it can drive the entire B-axis drive device 14 to rotate synchronously. At the same time, the drive motor B 15 is independently controlled to adjust the angle of the probe seat 20 through the B-axis right-angle reducer 16. The output shaft of the A-axis right-angle reducer 5 and the output shaft of the B-axis right-angle reducer 16, each of which has a rotation angle limited by the distance detection between the induction sheet and the limit sensor installed on the two shafts respectively. When the limit sensor senses the induction sheet, the corresponding shaft will stop rotating, thereby achieving precise position control. During the operation of the A-axis drive device 1 and the B-axis drive device 14, the air pump simultaneously inflates the built-in air pipe 19 to ensure that water cannot invade the internal electrical equipment in the underwater working environment, effectively preventing equipment damage caused by water ingress.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any mark in a claim should not be regarded as limiting the claim involved.

Claims

1. A dual-axis mechanism for underwater ultrasonic flaw detection equipment, characterized in that: The invention comprises a probe seat (20) and a dual drive: an A-axis drive device (1) and a B-axis drive device (14); the A-axis drive device (1) comprises a drive motor A (3), a motor output shaft A, an A-axis reducer (4) and an A-axis right-angle reducer (5) connected in sequence, and the B-axis drive device (14) comprises a drive motor B (15), a motor output shaft B and a B-axis right-angle reducer (16) connected in sequence; the A-axis drive device (1) and the B-axis drive device (14) are connected via a connecting flange (11), and the probe seat (20) is mounted on the output shaft of the B-axis right-angle reducer (16) via a fastener.

2. The dual-axis mechanism for underwater ultrasonic flaw detection equipment according to claim 1, characterized in that: The A-axis drive device (1) and the B-axis drive device (14) are both assembled and fastened with a double-layer aluminum alloy housing (10) on the outside, and are sealed inside with a rubber O-ring (2) and fasteners.

3. The dual-axis mechanism for underwater ultrasonic flaw detection equipment according to claim 2, characterized in that: The output shaft of the A-axis right-angle reducer (5) passes through the aluminum alloy housing (10) and fixes the lip seal ring (6) through the elastic retaining ring (7) installed in the hole; the output shaft of the B-axis right-angle reducer (16) fixes the lip seal ring (6) through the elastic retaining ring (7) installed in the hole, and extends out of the housing to connect with the probe seat (20).

4. The dual-axis mechanism for underwater ultrasonic flaw detection equipment according to claim 3 is characterized in that: The connecting flange (11) is provided with a sensing plate 1 (9), and the aluminum alloy housing (10) of the A-axis driving device (1) is provided with two limit sensors 1 (8), and the sensing plate 1 (9) provides the two limit sensors 1 (8) with a position signal of the connecting flange (11).

5. The dual-axis mechanism for underwater ultrasonic flaw detection equipment according to claim 4, characterized in that: The output shaft of the B-axis right-angle reducer (16) is provided with a second induction plate (17), and the aluminum alloy housing (10) of the B-axis drive device (14) is provided with two second limit sensors (18), and the second induction plate (17) provides the two second limit sensors (18) with a position signal of the output shaft of the B-axis right-angle reducer (16).

6. The dual-axis mechanism for underwater ultrasonic flaw detection equipment according to claim 5, characterized in that: The limit sensor 1 (8) and the limit sensor 2 (18) are both installed through the holes of the aluminum alloy housing (10), reinforced with double nuts, with rubber sealing washers placed inside and outside the nuts, and sealant is injected into the holes to form a sealant layer.

7. The dual-axis mechanism for underwater ultrasonic flaw detection equipment according to claim 6, characterized in that: An air pipe (19) is fixed inside the A-axis driving device (1) and the B-axis driving device (14), and the air pipe (19) is connected to an external air pump.

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