Jacket type phased array ultrasonic 0-degree longitudinal wave detection device

Abstract

The invention relates to the technical field of nondestructive testing of pressure-bearing equipment, and discloses a jacket type phased array ultrasonic 0-degree longitudinal wave detection device which comprises a jacket, a phased array probe and an encoder, a through groove is formed in the center of the jacket, the phased array probe is embedded in the through groove, the bottom of the phased array probe is higher than the bottom face of the jacket, and the encoder is arranged in the through groove. A gap exists between the bottom of the phased array probe and the bottom surface of the jacket, and the encoder is connected to one side of the jacket. According to the phased array ultrasonic contact longitudinal wave detection device, the stainless steel jacket and the phased array probe are combined, so that the problem of wear failure caused by direct contact of the probe and a workpiece and interface wave interference caused by a traditional 0-degree organic glass wedge block are effectively avoided, the sound energy transmission efficiency is improved, and the detection precision is improved. The problem that 0-degree longitudinal wave detection of a large-thickness workpiece is not reliable is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of nondestructive testing of pressure-bearing equipment, and in particular to a jacketed phased array ultrasonic 0° longitudinal wave detection device. Background Art

[0002] Phased array ultrasonic testing technology is widely used in the quality control of raw materials and welded joints in pressure-bearing equipment. 0° longitudinal wave linescan is a common inspection technique for plates, forgings, and welded joints.

[0003] Currently, 0° longitudinal wave line scanning is mostly implemented using a flat plexiglass wedge. Due to the reflection of ultrasonic waves in the wedge, this method produces periodic non-correlated display signals during testing. For test parts thicker than half the wedge thickness, this non-correlated display signal directly affects the evaluation and reliability of the test results. Furthermore, because excessive wedge thickness causes significant acoustic energy attenuation, the half-thickness of the wedge is controlled within a certain range. This results in a very limited workpiece thickness when using wedges for 0° longitudinal wave line scanning. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing 0° longitudinal wave line scanning has low reliability and limited detectable workpiece thickness.

[0005] In order to solve the above technical problems, the technical solution of the present invention is to provide a jacketed phased array ultrasonic 0° longitudinal wave detection device, including a jacket, a phased array probe and an encoder. A through groove is provided at the center of the jacket, and the phased array probe is embedded in the through groove. The bottom of the phased array probe is higher than the bottom surface of the jacket, that is, there is a gap between the bottom of the phased array probe and the bottom surface of the jacket, and the encoder is connected to one side of the jacket.

[0006] Optionally, the jacket is made of stainless steel.

[0007] Optionally, a water injection hole is provided on the phased array probe, and the lower end of the water injection hole extends to the bottom of the phased array probe and is communicated with the gap between the phased array probe and the jacket.

[0008] Optionally, a transducer chip is provided at the bottom of the phased array probe.

[0009] Optionally, positioning holes communicating with the through slots are provided on both sides of the jacket, and screws for fixing the phased array probe are provided in the positioning holes.

[0010] Optionally, bracket mounting holes are provided on both sides of the jacket, a connecting rod is connected to the bracket mounting hole via screws, the other end of the connecting rod is connected to an elastic mechanism via screws, and the encoder is connected to the elastic mechanism.

[0011] Optionally, the elastic mechanism includes a body, a spring and a bearing rod, the body is provided with a U-shaped groove, the bearing rod is inserted into the U-shaped groove, and both ends extend out of the U-shaped groove, the spring is arranged in the U-shaped groove and sleeved on the bearing rod, and the encoder is connected to both ends of the bearing rod.

[0012] In summary, the phased array ultrasonic contact method longitudinal wave detection device of the present invention, by adopting a combination of a stainless steel jacket and a phased array probe, effectively avoids the wear and failure caused by direct contact between the probe and the workpiece, as well as the interface wave interference caused by the traditional 0° organic glass wedge, improves the efficiency of acoustic energy transmission, and solves the problem of unreliable 0° longitudinal wave detection of thick workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a side perspective schematic diagram of the structure of the present invention;

[0014] Figure 2 This is another side perspective schematic diagram of the structure of the present invention;

[0015] Figure 3 It is a top view of the structure of the present invention;

[0016] In the figure: 1. Jacket; 2. Positioning hole; 3. Bracket mounting hole; 4. Jacket bottom; 5. Phased array probe; 6. Water injection hole; 7. Transducer chip; 8. Encoder; 9. Connecting rod; 10. Elastic mechanism. DETAILED DESCRIPTION

[0017] The following combination Figure 1-3 The present invention is described in further detail.

[0018] The present invention discloses a jacketed phased array ultrasonic 0° longitudinal wave detection device, referring to Figure 1 and Figure 2 , including a jacket 1, a phased array probe 5 and an encoder 8. A through groove is provided at the center of the jacket 1, and the phased array probe 5 is embedded in the through groove. The bottom of the phased array probe 5 is higher than the bottom surface 4 of the jacket, that is, there is a gap between the bottom of the phased array probe 5 and the bottom surface 4 of the jacket. The encoder 8 is connected to one side of the jacket 1.

[0019] In a further embodiment, the jacket 1 is made of stainless steel, and a water injection hole 6 is provided on the phased array probe 5. The lower end of the water injection hole 6 extends to the bottom of the phased array probe 5 and is connected to the gap between the phased array probe 5 and the jacket; a transducer chip 7 is provided at the bottom of the phased array probe 5. When the bottom surface 4 of the jacket contacts the surface of the workpiece, the transducer chip 7 does not directly contact the surface of the workpiece. After water is injected through the water injection hole 6, a thin water layer is formed between the workpiece surface and the transducer chip 7, thereby protecting the transducer chip 7 and obtaining a good coupling effect.

[0020] In a further embodiment, referring to Figure 3 , positioning holes 2 connected to the through slots are provided on both sides of the jacket 1, and screws for fixing the phased array probe 5 are provided in the positioning holes 2. Bracket mounting holes 3 are provided on both sides of the jacket 1, and connecting rods 9 are connected to the bracket mounting holes 3 by screws. The other end of the connecting rod 9 is connected to an elastic mechanism 10 by screws, and the encoder 8 is connected to the elastic mechanism 10; the elastic mechanism 10 includes a body, a spring and a bearing rod. A U-shaped groove is provided on the body, the bearing rod is inserted into the U-shaped groove, and both ends extend out of the U-shaped groove. The spring is provided in the U-shaped groove and sleeved on the bearing rod. The encoder 8 is connected to both ends of the bearing rod. When working, the spring gives the encoder 8 a downward elastic force so that it keeps in contact with the surface of the workpiece.

[0021] In other embodiments, the shape of the bottom surface 4 of the jacket can be processed into a curved surface according to the surface curvature of the workpiece to be inspected, thereby further improving the inspection effect of the curved workpiece.

[0022] When the present invention is in use, the jacket 1 is placed on the surface of the workpiece to be inspected, and the bottom surface 4 of the jacket is in contact with the workpiece. At the same time, the encoder 8 contacts the workpiece and is pressed into contact with the workpiece under the elastic force of the spring. Then, water is filled into the gap between the bottom surface 4 of the jacket, the phased array probe 5 and the workpiece to be inspected through the water injection hole 6, forming a thin water layer between the workpiece surface and the transducer chip 7, thereby performing 0° longitudinal wave line scanning detection. The phased array probe can perform water-coupled 0° longitudinal wave line scanning detection on thick workpieces without using organic glass wedges.

[0023] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A jacketed phased array ultrasonic 0° longitudinal wave detection device, characterized in that: The invention comprises a jacket (1), a phased array probe (5) and an encoder (8); a through slot is provided at the center of the jacket (1); the phased array probe (5) is embedded in the through slot; the bottom of the phased array probe (5) is higher than the bottom surface (4) of the jacket, that is, there is a gap between the bottom of the phased array probe (5) and the bottom surface (4) of the jacket; and the encoder (8) is connected to one side of the jacket (1).

2. The jacketed phased array ultrasonic 0° longitudinal wave detection device according to claim 1, characterized in that: The jacket (1) is made of stainless steel.

3. The jacketed phased array ultrasonic 0° longitudinal wave detection device according to claim 1, characterized in that: The phased array probe (5) is provided with a water injection hole (6), the lower end of the water injection hole (6) extends to the bottom of the phased array probe (5) and is communicated with the gap between the phased array probe (5) and the jacket.

4. The jacketed phased array ultrasonic 0° longitudinal wave detection device according to claim 3, characterized in that: A transducer chip (7) is provided at the bottom of the phased array probe (5).

5. The jacketed phased array ultrasonic 0° longitudinal wave detection device according to claim 1, characterized in that: Positioning holes (2) communicating with the through slots are provided on both sides of the jacket (1), and screws for fixing the phased array probe (5) are provided in the positioning holes (2).

6. The jacketed phased array ultrasonic 0° longitudinal wave detection device according to claim 1, characterized in that: Bracket mounting holes (3) are provided on both sides of the jacket (1), a connecting rod (9) is connected to the bracket mounting hole (3) via screws, the other end of the connecting rod (9) is connected to an elastic mechanism (10) via screws, and the encoder (8) is connected to the elastic mechanism (10).

7. The jacketed phased array ultrasonic 0° longitudinal wave detection device according to claim 6, characterized in that: The elastic mechanism (10) comprises a body, a spring and a bearing rod. The body is provided with a U-shaped groove. The bearing rod is inserted into the U-shaped groove, and both ends extend out of the U-shaped groove. The spring is arranged in the U-shaped groove and sleeved on the bearing rod. The encoder (8) is connected to both ends of the bearing rod.

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