Probe for phased array ultrasonic detection of lead-tin alloy sheath of high-voltage cable terminal

Abstract

The utility model discloses a probe for phased array ultrasonic detection of a lead-tin alloy sheath of a high-voltage cable terminal, which is characterized by comprising a phased array wedge block, a phased array probe arranged at the top of the phased array wedge block, a cavity arranged on the inner side of the phased array wedge block, a liquid adding pipe arranged on one side of the cavity, a one-way valve arranged in the liquid adding pipe, and a liquid outlet pipe arranged on the other side of the cavity. A sealing step groove and an installation step groove are sequentially formed in the lower side of the cavity of the phased array wedge block, a sealing pressing plate is installed in the sealing step groove, a sealing cover plate is installed in the installation step groove, through holes are formed in the center of the sealing pressing plate and the center of the sealing cover plate, the two sides of each through hole are subjected to round corner treatment, and a water bag soft film is arranged in each through hole. The edge of the water bag soft film is installed in the sealing step groove in a pressing and sealing mode through the sealing pressing plate, the scanning face of the phased array probe is arranged on the inner side of the water bag soft film, and one side of the water bag soft film protrudes out of the outer side of the sealing cover plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection probes, and in particular relates to a probe for phased array ultrasonic detection of lead-tin alloy sheaths at high-voltage cable terminals. Background Art

[0002] Ultrasonic testing refers to a non-destructive flaw detection method that uses ultrasonic waves to inspect internal defects of metal components. Ultrasonic waves are emitted to the surface of the component through a coupling agent using a transmitting probe. When the ultrasonic wave propagates inside the component, it will produce different reflected signals when it encounters different interfaces. The time difference between different reflected signals transmitted to the probe can be used to detect defects inside the component. The size, location and general nature of the defects can be determined based on the scanned image and echo characteristics.

[0003] When inspecting the lead-tin alloy sheath of the existing high-voltage cable terminal through ultrasonic testing, a combination of a wedge and a probe is usually used. This combination is widely used in the detection of flat plate and round tube welds. However, when detecting irregular shapes on the lead-tin alloy sheath of the high-voltage cable terminal, the wedge itself is hard and cannot completely fit its surface, resulting in a gap between the lead-tin alloy sheath of the high-voltage cable terminal and the wedge. Due to the gap between the workpiece and the wedge, the ultrasonic wave cannot be transmitted to the workpiece, and the detection requirements cannot be met. Utility Model Content

[0004] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a probe for phased array ultrasonic detection of lead-tin alloy sheaths at high-voltage cable terminals.

[0005] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0006] A probe for phased array ultrasonic detection of lead-tin alloy sheath at a high-voltage cable terminal, characterized in that it comprises a phased array wedge, a phased array probe is installed on the top of the phased array wedge, a cavity is provided on the inner side of the phased array wedge, a liquid filling tube is provided on one side of the cavity, a one-way valve is installed in the liquid filling tube, a sealing step groove and an installation step groove are provided on the lower side of the cavity of the phased array wedge in sequence, a sealing pressure plate is installed in the sealing step groove, a sealing cover plate is installed in the installation step groove, a through hole is provided in the center of the sealing pressure plate and the sealing cover plate, both sides of the through hole are rounded, a water bag soft membrane is provided in the through hole, the edge of the water bag soft membrane is pressed and sealed by the sealing pressure plate and installed in the sealing step groove, the scanning surface of the phased array probe is arranged on the inner side of the water bag soft membrane, and one side of the water bag soft membrane protrudes from the outer side of the sealing cover plate.

[0007] It is further defined that the top of the phased array wedge is provided with an assembly groove, the two sides of the phased array probe are provided with locking plates, the locking plates are provided with a plurality of equally arranged bolts, the phased array probe and the locking plates are both installed in the assembly groove, and are locked and connected with the phased array wedge by bolts. Such a structural design facilitates the fixed connection and installation of the phased array wedge and the phased array probe.

[0008] It is further defined that a liquid outlet pipe is installed on the other side of the cavity, and a control valve is installed in the liquid outlet pipe. Such a structural design can discharge the liquid in the cavity, which is convenient for replacement and use.

[0009] It is further defined that the sealing step groove and the installation step groove are both provided with a sealing ring groove, and a sealing ring is installed in the sealing ring groove. Such a structural design improves the connection and sealing effect of the sealing pressure plate, the sealing cover plate and the water bag soft film.

[0010] It is further defined that the sealing cover plate is arranged in an inverted T-shaped structure, the top of the sealing cover plate is pressed against the lower side of the sealing pressure plate, and the bottom of the sealing cover plate is fastened and installed in the installation step groove by screws. Such a structural design improves the fastness of the installation.

[0011] The beneficial effects of the utility model are as follows: the utility model fills water in the cavity so that the soft membrane of the water bag becomes elastic after being filled with water, and after coming into contact with the lead-tin alloy sheath of the high-voltage cable terminal, it can fully adhere to its surface for detection, thereby preventing a gap from appearing between the wedge block and the lead-tin alloy sheath of the high-voltage cable terminal, and preventing ultrasonic waves from being transmitted to the workpiece for detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0013] Figure 1 This is a schematic diagram of the structure of a probe for phased array ultrasonic detection of lead-tin alloy sheath at a high-voltage cable terminal according to an embodiment of the utility model;

[0014] Figure 2 This is a schematic cross-sectional structure diagram of a probe for phased array ultrasonic detection of lead-tin alloy sheath at a high-voltage cable terminal according to an embodiment of the utility model;

[0015] The main component symbols are described as follows:

[0016] Phased array wedge 1, phased array probe 2, cavity 3, liquid adding tube 4, one-way valve 5, sealing step groove 6, mounting step groove 7, sealing pressure plate 8, sealing cover plate 9, through hole 10, water bag soft membrane 11, assembly groove 12, locking plate 13, bolt 14, liquid outlet pipe 15, control valve 16, sealing ring 17. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1-2 As shown, a probe for phased array ultrasonic detection of lead-tin alloy sheath at a high-voltage cable terminal of the utility model is provided. A phased array probe 2 is installed on the top of the phased array wedge 1. A cavity 3 is provided on the inner side of the phased array wedge 1. A liquid adding tube 4 is provided on one side of the cavity 3. A one-way valve 5 is installed in the liquid adding tube 4. A sealing step groove 6 and an installation step groove 7 are sequentially provided on the lower side of the cavity 3 of the phased array wedge 1. A sealing pressure plate 8 is installed in the sealing step groove 6. A sealing cover plate 9 is installed in the installation step groove 7. A through hole 10 is provided in the center of the sealing pressure plate 8 and the sealing cover plate 9. Both sides of the through hole 10 are rounded. A water bag soft membrane 11 is provided in the through hole 10. The edge of the water bag soft membrane 11 is pressed and sealed by the sealing pressure plate 8 and installed in the sealing step groove 6. The scanning surface of the phased array probe 2 is arranged on the inner side of the water bag soft membrane 11, and one side of the water bag soft membrane 11 protrudes from the outer side of the sealing cover plate 9.

[0019] Preferably, the top of the phased array wedge 1 is provided with an assembly groove 12, and locking plates 13 are installed on both sides of the phased array probe 2. A plurality of evenly arranged bolts 14 are installed on the locking plates 13. The phased array probe 2 and the locking plates 13 are both installed in the assembly groove 12 and are locked and connected with the phased array wedge 1 through the bolts 14. Such a structural design facilitates the fixed connection and installation of the phased array wedge 1 and the phased array probe 2. In fact, other connection and installation structural shapes of the phased array wedge 1 and the phased array probe 2 can also be considered according to specific circumstances.

[0020] Preferably, a liquid outlet pipe 15 is installed on the other side of the cavity 3, and a control valve 16 is installed in the liquid outlet pipe 15. Such a structural design can discharge the liquid in the cavity 3, which is convenient for replacement and use. In fact, other liquid discharge structural shapes of the cavity 3 can also be considered according to specific circumstances.

[0021] Preferably, a sealing ring groove is provided in both the sealing step groove 6 and the mounting step groove 7, and a sealing ring 17 is installed in the sealing ring groove. Such a structural design improves the connection and sealing effect of the sealing pressing plate 8, the sealing cover plate 9 and the water bag soft membrane 11. In fact, other sealing structural shapes of the sealing step groove 6 and the mounting step groove 7 can also be considered according to specific circumstances.

[0022] Preferably, the sealing cover plate 9 is arranged in an inverted T-shaped structure, the top of the sealing cover plate 9 is pressed against the lower side of the sealing pressure plate 8, and the bottom of the sealing cover plate 9 is screwed and installed in the installation step groove 7. Such a structural design improves the tightness of the installation. In fact, other installation structural shapes of the sealing cover plate 9 can also be considered according to specific circumstances.

[0023] In this embodiment, when in use, water is filled into the cavity 3 through the liquid filling tube 4 until the cavity 3 is full. The water bag soft membrane 11 will protrude from the outside of the sealing cover plate 9 under the weight of the water, so that the water bag soft membrane 11 has elasticity. When the water bag soft membrane 11 is used to perform contact detection with the lead-tin alloy sheath of the high-voltage cable terminal, the water bag soft membrane 11 can fully contact its surface. Even if the surface shape of the lead-tin alloy sheath of the high-voltage cable terminal is irregular, it only needs to apply a certain pressure, and the water bag soft membrane 11 can be tightly attached to the surface of the lead-tin alloy sheath of the high-voltage cable terminal, thereby filling the gap between the phased array wedge 1 and the lead-tin alloy sheath of the high-voltage cable terminal to meet the detection requirements.

[0024] The sealing pressing plate 8 and the sealing cover plate 9 not only press and install the water bag soft membrane 11, but also have a sealing effect to prevent the water in the cavity 3 from leaking out during use.

[0025] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A phased array ultrasonic detection probe for lead-tin alloy sheath of high-voltage cable terminals, characterized in that: The invention comprises a phased array wedge (1), a phased array probe (2) is installed on the top of the phased array wedge (1), a cavity (3) is provided on the inner side of the phased array wedge (1), a liquid adding pipe (4) is provided on one side of the cavity (3), a one-way valve (5) is installed in the liquid adding pipe (4), a sealing step groove (6) and an installation step groove (7) are provided on the lower side of the cavity (3) in sequence, a sealing pressure plate (8) is installed in the sealing step groove (6), and a valve (5) is installed in the installation step groove (7). A sealing cover plate (9) is provided, and the sealing pressure plate (8) and the sealing cover plate (9) are both provided with a through hole (10) at their centers, and both sides of the through hole (10) are rounded, and a water bag soft membrane (11) is provided in the through hole (10), and the edge of the water bag soft membrane (11) is installed in the sealing step groove (6) by pressing and sealing through the sealing pressure plate (8), and the scanning surface of the phased array probe (2) is arranged on the inner side of the water bag soft membrane (11), and one side of the water bag soft membrane (11) protrudes from the outer side of the sealing cover plate (9).

2. A phased array ultrasonic detection probe for lead-tin alloy sheath of a high-voltage cable terminal according to claim 1, characterized in that: The top of the phased array wedge (1) is provided with an assembly groove (12), and locking plates (13) are installed on both sides of the phased array probe (2), and a plurality of evenly arranged bolts (14) are installed on the locking plates (13). The phased array probe (2) and the locking plates (13) are both installed in the assembly groove (12) and are locked and connected to the phased array wedge (1) via the bolts (14).

3. A phased array ultrasonic detection probe for lead-tin alloy sheath of a high-voltage cable terminal according to claim 2, characterized in that: A liquid outlet pipe (15) is installed on the other side of the cavity (3), and a control valve (16) is installed in the liquid outlet pipe (15).

4. A phased array ultrasonic detection probe for lead-tin alloy sheath of a high-voltage cable terminal according to claim 3, characterized in that: The sealing step groove (6) and the installation step groove (7) are both provided with sealing ring grooves, and sealing rings (17) are installed in the sealing ring grooves.

5. A phased array ultrasonic detection probe for lead-tin alloy sheath of a high-voltage cable terminal according to claim 4, characterized in that: The sealing cover plate (9) is arranged in an inverted T-shaped structure, the top of the sealing cover plate (9) is pressed against the lower side of the sealing pressure plate (8), and the bottom of the sealing cover plate (9) is fastened and installed in the installation step groove (7) by means of screws.

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