Variable-diameter automatic detection device for welding seam scanning

Abstract

The invention provides a variable-diameter automatic detection device for welding seam scanning, which is characterized in that a positioning rod module is mounted at the upper end or the side surface of a driving trolley module, and the driving trolley module is used for being adsorbed on the pipe wall of a workpiece to be detected, so that the automatic detection device realizes circumferential movement around a welding seam; the connecting rod modules are installed at the two ends of the driving trolley module respectively. The probe clamping frame module is connected with the connecting rod modules on the two sides respectively; the magnetic wheel modules are respectively installed on the corresponding probe clamping frame modules, the encoder module is installed on the magnetic wheel modules, and the magnetic wheel modules are adsorbed on a rotor to provide pressing force for the probe clamping frame modules and the encoder module. The automatic detection device is provided with the circumferential and axial probe clamping frames for the circumferential weld joint, the probe clamping frames can be selected according to use requirements, and meanwhile, the automatic detection device is further provided with the positioning rod assembly, so that the scanning position can be effectively controlled not to deviate in the scanning process.

Description

Technical Field

[0001] The invention relates to the technical field of nondestructive testing, and in particular to a variable-diameter automatic testing device for welding seam scanning. Background Art

[0002] Nondestructive testing technology is an important means to ensure product quality and equipment operation safety in modern industry. Its level is an important indicator of a country's industrial development. Nondestructive testing is an indispensable and effective tool for industrial development, and its importance has been recognized.

[0003] The biggest feature of non-destructive testing is that it can be tested without damaging the material and structure of the test piece. Therefore, after implementing non-destructive testing, the inspection rate of the product can reach 100%. The non-destructive testing of steam turbine rotors uses ultrasonic testing. The non-destructive testing of steam turbine rotor welds is a systematic project involving multiple disciplines such as steam turbines and metal materials.

[0004] In order to provide reliable data for safe operation of the rotor and detection of its life span. There are many types of rotor diameter specifications, and the inspected area is difficult to manually inspect. However, traditional detection devices are mostly simple handheld types or special scanning devices for fixed diameters, which are not competent for ultrasonic scanning of rotors.

[0005] Therefore, the inventor of the present application has designed a variable diameter automatic detection device for weld scanning, which is suitable for scanning welds of rotors with different diameters. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the defects in the prior art that the non-destructive testing device cannot be applied to rotors of different specifications and cannot perform ultrasonic scanning of rotors, and to provide a variable diameter automatic testing device for weld scanning.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] A variable diameter automatic detection device for welding seam scanning, characterized in that the automatic detection device comprises:

[0009] A driving trolley module and a positioning rod module, wherein the positioning rod module is installed on the upper end or side of the driving trolley module, and the driving trolley module is used to be adsorbed on the pipe wall of the workpiece to be tested, so that the automatic detection device can realize circumferential movement around the circumferential weld;

[0010] At least two connecting rod modules, the connecting rod modules are respectively mounted at two ends of the driving trolley module;

[0011] At least two probe clamping frame modules, wherein the probe clamping frame modules are respectively connected to the connecting rod modules on both sides;

[0012] At least two magnetic wheel modules and encoder modules, the magnetic wheel modules are respectively mounted on the corresponding probe clamping frame modules, the encoder module is mounted on the magnetic wheel modules, and the magnetic wheel modules are adsorbed on the rotor to provide a clamping force for the probe clamping frame module and the encoder module.

[0013] According to one embodiment of the present invention, the driving vehicle module includes a magnetic wheel, a driving motor and an encoder. The magnetic wheel is mounted on the driving motor and is used to be adsorbed on the workpiece to be measured. The encoder is mounted on the driving motor.

[0014] According to an embodiment of the present invention, the connecting rod module is assembled from a plurality of connecting rods, and assembly holes are provided at both ends and in the middle of the connecting rods, and the connecting rods are assembled and connected through the assembly holes.

[0015] According to an embodiment of the present invention, the connecting rod module can adapt to rotors of different diameters by adjusting the angle of the connecting rod.

[0016] According to an embodiment of the present invention, the probe clamping frame module and the connecting rod module are connected via a clamping block.

[0017] According to an embodiment of the present invention, an ultrasonic detection probe is installed on the probe clamping frame module, and the ultrasonic detection probe is coupled to the workpiece to be detected under elastic pre-pressure.

[0018] According to an embodiment of the present invention, the ultrasonic detection probe is mounted on the probe clamping frame module via a clamping arm.

[0019] According to an embodiment of the present invention, elastic pressure is applied between the probe clamping frame module and the workpiece to be inspected via a spring.

[0020] According to an embodiment of the present invention, the positioning rod module is connected to the driving trolley module via a clamping block, and the positioning rod module can adjust the telescopic length.

[0021] According to an embodiment of the present invention, a magnetic roller is installed at the tail end of the positioning rod module for adsorbing on the side wall of the rotor.

[0022] The positive and progressive effects of the present invention are:

[0023] The invention discloses a variable diameter automatic detection device for weld scanning, which is equipped with an automatic driving trolley, and can drive the whole set of scanning devices along a specified path to complete the scanning work according to program settings. The scanning device body is composed of a connecting rod device with adjustable angle, and the connecting rod angle is adjusted to adapt to different rotor diameters.

[0024] The ultrasonic probe is mounted on the probe holder, and the scanning device probe holder is elastically pre-pressed to ensure elastic pressure between the scanning device and the workpiece being tested. While ensuring elastic coupling between the ultrasonic probe and the workpiece being tested, the wear between the scanning device and the workpiece being tested is reduced, thereby increasing the service life.

[0025] The automatic detection device is equipped with circumferential and axial probe clamps for the ring weld, which can be selected according to the use requirements. At the same time, the automatic detection device is also equipped with a positioning rod assembly, which can effectively control the scanning position from shifting during the scanning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0027] Figure 1 It is a schematic structural diagram of the variable diameter automatic detection device for weld scanning of the present invention.

[0028] Figure 2 The present invention is a schematic structural diagram of a probe clamping frame module in a variable diameter automatic detection device for weld scanning.

[0029] Figure 3 The present invention is a schematic structural diagram of a driving carriage mechanism in a variable diameter automatic detection device for weld scanning.

[0030] Figure 4 The figure is a schematic structural diagram of a positioning rod module in a variable diameter automatic detection device for weld scanning according to the present invention.

[0031] Figure 5 The diagram is a schematic diagram of the structure of the encoder in the variable diameter automatic detection device for welding seam scanning of the present invention.

[0032] Figure 6 The figure is a schematic diagram of the use status of the variable diameter automatic detection device for weld scanning of the present invention.

[0033] [Reference Signs]

[0034] Driving car module 10

[0035] Positioning rod module 20

[0036] Connecting rod module 30

[0037] Probe holder module 40

[0038] Ultrasonic detection probe 41

[0039] Magnetic wheel module 50

[0040] Encoder module 60

[0041] Steam turbine rotor 100

[0042] Weld 110 DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0044] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to represent the same or similar parts.

[0045] Furthermore, although the terms used in the present invention are selected from well-known and commonly used terms, some terms mentioned in the present invention specification may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this document.

[0046] Furthermore, it is required that the present invention be understood not only by the actual terms used but also by the meanings connoted by each term.

[0047] like Figures 1 to 6 As shown, the present invention discloses a variable diameter automatic detection device for weld scanning, which includes: a driving trolley module 10, a positioning rod module 20, at least two connecting rod modules 30, at least two probe clamping frame modules 40, at least two magnetic wheel modules 50 and an encoder module 60. The positioning rod module 20 is installed on the upper end or side of the driving trolley module 10, and the driving trolley module 10 is used to be adsorbed on the pipe wall of the workpiece to be measured, so that the automatic detection device can realize circumferential movement around the ring weld. The connecting rod modules 30 are respectively installed at the two ends of the driving trolley module 10. The probe clamping frame module 40 is respectively connected to the connecting rod modules 30 on both sides. The magnetic wheel modules 50 are respectively installed on the corresponding probe clamping frame modules 40, and the encoder module 60 is installed on the magnetic wheel module 50. The magnetic wheel module 50 is adsorbed on the rotor to provide a pressing force for the probe clamping frame module 40 and the encoder module 60.

[0048] Preferably, the driving trolley module 10 includes a magnetic wheel, a driving motor and an encoder. The magnetic wheel is mounted on the driving motor and is used to be adsorbed on the workpiece to be measured. The encoder is mounted on the driving motor. The driving trolley module 10 is equipped with a standard interface for connecting the connecting rod module 30. The driving trolley module mainly provides power for the entire scanning device. The wheels of the trolley are magnetic and can be adsorbed on the pipe wall of the workpiece to be measured. According to the program setting, the entire scanning device completes circumferential movement around the circumferential weld.

[0049] Further preferably, the connecting rod module 30 is assembled from a plurality of connecting rods, and assembly holes are provided at both ends and in the middle of the connecting rods, and the connecting rods are assembled and connected through the assembly holes, for example, different connecting rod assemblies can be combined with each other into a required shape in an expected manner. The connecting rod module 30 can adapt to rotors of different diameters by adjusting the angle of the connecting rod. The connecting rod module 30 provides a structural connection function between the driving mechanism and the probe clamping frame module 40, the encoder, the positioning rod module 20, etc. The probe clamping frame module 40 and the connecting rod module 30 are connected through a clamping block.

[0050] In addition, an ultrasonic detection probe 41 is mounted on the probe clamping frame module 40, and the ultrasonic detection probe 41 is coupled to the workpiece under elastic pre-pressure. The ultrasonic detection probe is mounted on the probe clamping frame module 40 through a clamping arm. An elastic pressure is applied between the probe clamping frame module 40 and the workpiece under inspection through a spring.

[0051] The positioning rod module 20 is connected to the driving trolley module 10 through a clamping block, and the positioning rod module 20 can adjust the telescopic length. A magnetic roller is installed at the tail end of the positioning rod module 20 for adsorbing on the side wall of the rotor, so that the entire scanning device will not deviate during the circumferential weld inspection.

[0052] The components of the automatic detection device are required to be made of materials that are not easily rusted or corroded in harsh environments, and the general indicator is that the salt spray test is greater than 48 hours. The materials can be stainless steel 304, stainless steel 316, aluminum alloy, copper plated with nickel, etc.

[0053] According to the above structural description, the driving trolley module 10 provides power drive for the entire device. The driving trolley module 10 is adsorbed on the main shaft of the steam turbine rotor 100 through a magnetic wheel, providing a driving force that can enable the entire device to move circumferentially around the weld 110.

[0054] The driving trolley module 30 is structurally connected with the probe clamping frame module 40, the magnetic wheel module 50, the positioning rod module 20, and the encoder module 60 through the connecting rod module 30. The connecting rod module 30 is also adsorbed on the rotor through the magnetic wheel module to provide a pressing force for the probe clamping frame module 40 and the encoder module 60.

[0055] The probe clamping frame module 40 is connected to the connecting rod module 30 through a connecting block, and the detection probe is installed through a clamping arm. The probe clamping frame and the workpiece to be detected are subjected to elastic pressure through a spring to avoid the probe from being worn due to rigid friction between the probe and the workpiece to be detected, thereby increasing the service life of the probe. In addition, the detection device is equipped with both circumferential and axial probe clamping frames, which can be selected according to the detection requirements.

[0056] The positioning rod in the positioning rod module 20 can be telescopically adjusted to adjust the distance from the rotor side wall according to the position of the weld. The roller at the tail end of the positioning rod module 20 is magnetic and can be adsorbed on the rotor side wall. It is rigidly connected through the positioning rod, thereby ensuring that the device will not deviate when moving circumferentially around the annular seam, thereby improving the detection precision and accuracy.

[0057] The variable diameter automatic detection device for weld scanning of the present invention adopts automated detection, improves detection efficiency and accuracy, is adaptable to a wide range of rotor diameters, has strong versatility, and has significant improvement effects in actual detection.

[0058] In summary, the variable diameter automatic detection device for weld scanning of the present invention is equipped with an automated driving trolley, which can drive the entire scanning device along a specified path to complete the scanning work according to program settings. The scanning device body is composed of a connecting rod device with an adjustable angle, and the connecting rod angle is adjusted to adapt to different rotor diameters.

[0059] The ultrasonic probe is mounted on the probe holder, and the scanning device probe holder is elastically pre-pressed to ensure elastic pressure between the scanning device and the workpiece being tested. While ensuring elastic coupling between the ultrasonic probe and the workpiece being tested, the wear between the scanning device and the workpiece being tested is reduced, thereby increasing the service life.

[0060] The automatic detection device is equipped with circumferential and axial probe clamps for the ring weld, which can be selected according to the use requirements. At the same time, the automatic detection device is also equipped with a positioning rod assembly, which can effectively control the scanning position from shifting during the scanning process.

[0061] For those skilled in the art, the above invention disclosure is only used as an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary implementation of the present application.

[0062] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0063] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A variable diameter automatic detection device for welding seam scanning, characterized in that: The automatic detection device comprises: A driving trolley module and a positioning rod module, wherein the positioning rod module is installed on the upper end or side of the driving trolley module, and the driving trolley module is used to be adsorbed on the pipe wall of the workpiece to be tested, so that the automatic detection device can realize circumferential movement around the circumferential weld; At least two connecting rod modules, the connecting rod modules are respectively mounted at two ends of the driving trolley module; At least two probe clamping frame modules, wherein the probe clamping frame modules are respectively connected to the connecting rod modules on both sides; At least two magnetic wheel modules and encoder modules, the magnetic wheel modules are respectively mounted on the corresponding probe clamping frame modules, the encoder module is mounted on the magnetic wheel modules, and the magnetic wheel modules are adsorbed on the rotor to provide a clamping force for the probe clamping frame module and the encoder module.

2. The variable diameter automatic detection device for weld scanning according to claim 1, characterized in that: The driving trolley module comprises a magnetic wheel, a driving motor and an encoder. The magnetic wheel is mounted on the driving motor and is used to be adsorbed on the workpiece to be measured. The encoder is mounted on the driving motor.

3. The variable diameter automatic detection device for weld scanning according to claim 1, characterized in that: The connecting rod module is assembled from a plurality of connecting rods. Assembly holes are provided at both ends and in the middle of the connecting rods, and the connecting rods are assembled and connected through the assembly holes.

4. The variable diameter automatic detection device for welding seam scanning according to claim 3, characterized in that: The connecting rod module can adapt to rotors of different diameters by adjusting the angle of the connecting rod.

5. The variable diameter automatic detection device for weld scanning according to claim 1, characterized in that: The probe clamping frame module and the connecting rod module are connected via a clamping block.

6. The variable diameter automatic detection device for welding seam scanning according to claim 1, characterized in that: An ultrasonic detection probe is installed on the probe clamping frame module, and the ultrasonic detection probe is coupled with the workpiece to be detected under elastic pre-pressure.

7. The variable diameter automatic detection device for welding seam scanning according to claim 6, characterized in that: The ultrasonic detection probe is mounted on the probe clamping frame module through a clamping arm.

8. The variable diameter automatic detection device for weld scanning according to claim 1, characterized in that: The probe clamping frame module and the detected workpiece are subjected to elastic pressure through a spring.

9. The variable diameter automatic detection device for welding seam scanning according to claim 1, characterized in that: The positioning rod module is connected to the driving trolley module through a clamping block, and the positioning rod module can adjust the telescopic length.

10. The variable diameter automatic detection device for welding seam scanning according to claim 9, characterized in that: A magnetic roller is installed at the tail end of the positioning rod module for adsorbing on the side wall of the rotor.

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