CN212060053U - Automatic internal detection device for high-pressure hydrogen storage container end socket welding seam - Google Patents
Automatic internal detection device for high-pressure hydrogen storage container end socket welding seam Download PDFInfo
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- CN212060053U CN212060053U CN202020333079.0U CN202020333079U CN212060053U CN 212060053 U CN212060053 U CN 212060053U CN 202020333079 U CN202020333079 U CN 202020333079U CN 212060053 U CN212060053 U CN 212060053U
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Abstract
The utility model relates to a detection area of high pressure hydrogen storage container head welding seam. The technical scheme is as follows: the utility model provides a detection device in automation of high pressure hydrogen storage container head welding seam which characterized in that: the device comprises a mounting seat, a motor, a phased array probe, an ultrasonic detector and a guide structure, wherein the mounting seat is used for being fixed on a connecting pipe forging, the phased array probe can extend into the connecting pipe forging, the ultrasonic detector is connected with the phased array probe, and the guide structure is used for transmitting motor power to drive the phased array probe to move around the circumference in an inner hole of the connecting pipe forging; the guide structure comprises a guide plate fixed on the mounting seat through a fastener, an annular guide rail arranged at the edge of an inner ring of the guide plate, a gear ring arranged on the outer circumferential surface of the guide plate, a gear fixed on a motor rotating shaft and meshed with the gear ring, and a sliding table slidably positioned on the guide rail; the motor is fixed on the sliding table. The device can carry out ultrasonic phased array detection on butt welding seams of all-multilayer high-pressure hydrogen storage container end enclosures, and has the characteristics of high detection sensitivity and convenience in operation.
Description
Technical Field
The utility model relates to a detection area of high pressure hydrogen storage container head welding seam especially relates to a detection device in automation of high pressure hydrogen storage container head welding seam.
Background
The full multilayer high-pressure hydrogen storage container is important equipment for storing high-pressure hydrogen and is applied to a hydrogen station. The butt welding seam and the heat affected zone 4 between the pipe forging 5 and the double-layer hemispherical head 1 are of a single-layer structure different from other parts (double layers or multiple layers) of the container, and once defects are expanded, the container can be broken, so that the safety of equipment and personnel is seriously threatened, and even disastrous accidents can be caused.
Because the connecting pipe forging of the full-multilayer high-pressure hydrogen storage container is provided with the opening with the narrow inner diameter, the conventional detection equipment cannot enter due to the special structure, and the defects generated in the manufacturing process and the using process are difficult to effectively detect by the conventional ray detection, magnetic powder detection, penetration detection and corresponding detection equipment. Ultrasonic testing has convenient operation, resolution ratio height, with low costs, adaptation face wide, to the higher advantage of thick wall container area type defect detection sensitivity, nevertheless to the internal detection of this kind of narrow and small trompil, ultrasonic testing also has following difficult problem:
1) the aperture is small, and the conventional phased array probe is difficult to enter;
2) the inner wall surface is a concave surface, the curvature radius is small, and the ultrasonic propagation energy loss of the interface is large;
3) the sound path from the inner wall of the opening to the heat affected zone at the outer side of the welding seam exceeds 120mm, and the common ultrasonic focusing technology is difficult to meet the requirements;
4) the welding structure is complex, one side of the area to be detected is double-layer low alloy steel (double-layer hemispherical head), the other side is single-layer austenitic stainless steel (connecting pipe forging), the waveform judgment is difficult, the welding section is thick, and the detection thickness range is difficult to be completely covered by single scanning;
5) the welding seam is austenitic stainless steel, and has coarse grains and anisotropy, so that the acoustic energy attenuation is large and the scattering is serious.
Therefore, the existing ultrasonic phased array technology is difficult to achieve satisfactory effect on the detection of the butt welding seam of the fixed full-multilayer high-pressure hydrogen storage container end enclosure.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming not enough among the above-mentioned background art, providing a detection device in automation of high pressure hydrogen storage container head welding seam, the device should be able to carry out ultrasonic phased array to full multilayer high pressure hydrogen storage container head butt weld and detect to have detectivity height, convenient operation's characteristics.
The technical scheme of the utility model is that:
the utility model provides a detection device in automation of high pressure hydrogen storage container head welding seam which characterized in that: the device comprises a mounting seat, a motor, a phased array probe, an ultrasonic detector and a guide structure, wherein the mounting seat is used for being fixed on a connecting pipe forging, the phased array probe can extend into the connecting pipe forging, the ultrasonic detector is connected with the phased array probe, and the guide structure is used for transmitting motor power to drive the phased array probe to move around the circumference in an inner hole of the connecting pipe forging;
the guide structure comprises a guide plate fixed on the mounting seat through a fastener, an annular guide rail arranged at the edge of an inner ring of the guide plate, a gear ring arranged on the outer circumferential surface of the guide plate, a gear fixed on a motor rotating shaft and meshed with the gear ring, and a sliding table slidably positioned on the guide rail; the motor is fixed on the sliding table;
the phased array probe comprises a mounting rod which is coaxially arranged with the inner ring of the guide plate, a base which is coaxially fixed at the left end of the mounting rod and extends into the inner hole of the connecting pipe forging, a plurality of array elements which are fixed on the base, and wires which are respectively connected with the array elements and the ultrasonic detector; the mounting rod is fixed with the sliding table.
Be equipped with the mounting groove in the base, array element fixes in the mounting groove, and the sound-transmitting voussoir is fixed and with array element cover in the mounting groove with the base, and array element surface is equipped with the protection film.
The phased array probe is fixed on the sliding table through a pressing structure; the pressing structure comprises a support fixed with the sliding table, a sliding rod fixed on the support and perpendicular to the installation rod, a sliding block capable of sliding along the sliding rod and fixed with the installation rod, and a spring sleeved on the sliding rod and used for pushing the sliding block.
And the base is provided with a buffer piece for protecting the wall surface of the inner hole of the connecting pipe forging.
The mounting seat is made of non-metal materials; and the mounting seat is provided with an internal thread matched with the connecting pipe forging.
The utility model has the advantages that:
the utility model discloses a mount pad can with take over forging threaded connection, therefore the phased array probe volume is less can put into the narrow and small takeover forging of trompil, and the motor is installed on the slip table and is circular motion through guide structure drive phased array probe to the realization is to the automatic internal detection of high-pressure hydrogen storage container head welding seam.
Drawings
Fig. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic view of the structure of the phased array probe in the present invention.
Fig. 3 is a schematic diagram of the right-side structure of fig. 2.
Fig. 4 is a schematic view of direction a-a in fig. 3.
Detailed Description
The present invention will be further described with reference to the drawings attached to the specification, but the present invention is not limited to the following embodiments.
As shown in figure 1, the automatic internal detection device for the high-pressure hydrogen storage container end socket welding seam comprises a mounting base 2, a motor 9, a phased array probe 23, an ultrasonic detector 14, a guide structure and a compression structure.
The mounting seat is used for being fixed on the vessel connecting pipe forging, a mounting hole which is suitable for the outer diameter of the connecting pipe forging is formed in the mounting seat, and an internal thread which is matched with the external thread of the connecting pipe forging is formed in the mounting hole. The mounting seat is made of non-metal materials (such as nylon) so as to avoid damaging the single-layer connecting pipe forging.
The guide structure is arranged on the mounting seat. In the guide structure: the guide plate 3 is fixed on the top end surface of the mounting seat through a fastener 6; the guide plate is annular, the edge of the inner ring of the guide plate is provided with an annular guide rail (omitted in the figure) which is arranged along the circumferential direction, and the outer circumferential surface of the guide plate is provided with a gear ring 3.1; the fastener can be a screw 6; the sliding table 8 is slidably positioned on the guide rail; the motor is fixed on the sliding table, and the gear 7 is fixed on the motor rotating shaft and meshed with the gear ring.
The phased array probe is fixed with the sliding table through a pressing structure. The phased array probe comprises a mounting rod 19, a base 20 and a plurality of array elements 17. The mounting rod and the base are coaxially fixed and vertically penetrate through the inner ring of the guide plate. Be equipped with mounting groove 18 on the base, array element arranges and fixes in the mounting groove along the length direction of base, and array element surface is equipped with protection film 24, and array element is connected to the one end of wire 13 and other end pass and connect ultrasonic detector behind the installation pole, and it is fixed with base 20 that sound-transmitting wedge 25 passes through screw 22, and sound-transmitting wedge covers array element in the mounting groove. Still be equipped with the bolster on the base, O type circle 21 can be adopted to the bolster, and the both ends of base are equipped with the annular grooving 25 that is used for installing O type circle, and O type circle protrusion base surface can separate phased array probe and the interior pore wall face of taking over the forging, prevents that phased array probe from damaging the hole.
In the phased array probe: select for use R20's curved surface sound-transmitting wedge, the protection film of 0.1mm thickness, the longitudinal wave should be selected to the wave pattern, 4MHz detects the frequency, and the array element interval is 0.8mm, and the array element clearance is got 0.1mm, and the array element width is 0.7mm, and 10mm are got to array element length, and array element quantity is 128, realizes the directional control and the dynamic focus of phased array wave beam through 128 array elements.
In the pressing structure, a support 10 is fixed on a sliding table, at least two sliding rods 16 are fixed on the support, the sliding rods are perpendicular to a phased array probe, a sliding block 15 is positioned on each sliding rod in a sliding mode, the sliding block is fixed with an installation rod of the phased array probe, a spring 11 is sleeved on the sliding rods and used for pushing the sliding block, and the sliding block and an acoustic-transparent wedge block are respectively arranged on two sides of the phased array probe so as to ensure that the acoustic-transparent wedge block can be close to the inner hole wall surface of a connecting pipe forging under the thrust action of the spring.
When the motor works, the gear rolls along the gear ring of the guide plate, the sliding table is driven to do circular motion, and then the sliding table drives the phased array probe to do circular motion in the connecting pipe forge piece, so that automatic internal detection of the high-pressure hydrogen storage container end socket welding line is realized.
The utility model discloses a use method does:
filling water into the container before detection, and taking the water as a coupling agent for ultrasonic phased array detection;
screwing the mounting seat on the connecting pipe forging 5, connecting the phased array probe with an ultrasonic detector, extending the phased array probe into the connecting pipe forging, moving the front end of the phased array probe to the tail end of an inner hole of the connecting pipe forging according to the structural size of the container, and fixing the guide plate on the mounting seat through a fastener (the motor, the phased array probe, the guide structure and the compression structure are integrated parts);
starting an ultrasonic detector, adjusting parameters, enabling a phased array to carry out deflection focusing scanning of linear shapes or fan shapes and the like, and concentrating a focus area at a butt welding seam of the end socket; and starting a motor, driving the phased array probe to do circular motion through the sliding table, and carrying out circumferential scanning on the interior of the pipe forging.
Observing a display image on the ultrasonic detector 14 in the scanning process, analyzing scanning result images obtained by scanning A, B, C and the like, and if suspicious defects are found, rechecking the corresponding area;
after the detection is finished, the fastener is loosened, the guide plate (the motor, the phased array probe, the guide structure and the compression structure) is detached, and finally the mounting seat is unscrewed.
By the method, the volume type defect, the area type defect and the longitudinal defect in the welding seam and the heat affected zone can be basically detected.
Finally, it should be noted that the above-mentioned list is only the specific embodiment of this patent. Obviously, this patent is not limited to the above embodiments, but may be modified in many ways. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of this patent are to be considered within the scope of protection of this patent.
Claims (5)
1. The utility model provides a detection device in automation of high pressure hydrogen storage container head welding seam which characterized in that: the device comprises a mounting seat (2) used for being fixed on a connecting pipe forging, a motor (9), a phased array probe (23) capable of extending into the connecting pipe forging, an ultrasonic detector (14) connected with the phased array probe, and a guide structure used for transmitting motor power to drive the phased array probe to move around the circumference in an inner hole of the connecting pipe forging;
the guide structure comprises a guide plate (3) fixed on the mounting seat through a fastener, an annular guide rail arranged at the edge of an inner ring of the guide plate, a gear ring (3.1) arranged on the outer circumferential surface of the guide plate, a gear (7) fixed on a motor rotating shaft and meshed with the gear ring, and a sliding table (8) slidably positioned on the guide rail; the motor is fixed on the sliding table;
the phased array probe comprises a mounting rod (19) which is coaxially arranged with the inner ring of the guide plate, a base (20) which is coaxially fixed at the left end of the mounting rod and extends into the inner hole of the connecting pipe forging, a plurality of array elements (17) which are fixed on the base, and wires (13) which are respectively connected with the array elements and the ultrasonic detector; the mounting rod is fixed with the sliding table.
2. The automatic internal detection device for the welding seam of the end socket of the high-pressure hydrogen storage container according to claim 1, which is characterized in that: be equipped with mounting groove (18) in the base, array element fixes in the mounting groove, and sound-transparent voussoir (25) are fixed and cover array element in the mounting groove with the base, and array element surface is equipped with protection film (24).
3. The automatic internal detection device for the welding seam of the end socket of the high-pressure hydrogen storage container according to claim 2, characterized in that: the phased array probe is fixed on the sliding table through a pressing structure; the pressing structure comprises a support (10) fixed with the sliding table, a sliding rod (16) fixed on the support and perpendicular to the installation rod, a sliding block (15) capable of sliding along the sliding rod and fixed with the installation rod, and a spring (11) sleeved on the sliding rod and used for pushing the sliding block.
4. The automatic internal detection device for the welding seam of the end socket of the high-pressure hydrogen storage container according to claim 3, characterized in that: and the base is provided with a buffer piece for protecting the wall surface of the inner hole of the connecting pipe forging.
5. The automatic internal detection device for the welding seam of the end socket of the high-pressure hydrogen storage container according to claim 4, wherein: the mounting seat is made of non-metal materials; and the mounting seat is provided with an internal thread matched with the connecting pipe forging.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020333079.0U CN212060053U (en) | 2020-03-17 | 2020-03-17 | Automatic internal detection device for high-pressure hydrogen storage container end socket welding seam |
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| CN202020333079.0U CN212060053U (en) | 2020-03-17 | 2020-03-17 | Automatic internal detection device for high-pressure hydrogen storage container end socket welding seam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111272878A (en) * | 2020-03-17 | 2020-06-12 | 浙江省特种设备科学研究院 | Automatic internal detection device for high-pressure hydrogen storage container end socket welding seam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111272878A (en) * | 2020-03-17 | 2020-06-12 | 浙江省特种设备科学研究院 | Automatic internal detection device for high-pressure hydrogen storage container end socket welding seam |
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