Non-contact x-ray inspection apparatus and method

Abstract

The application discloses a kind of non-contact X-ray detection device and method, detection device includes annular base, first support column, second support column, nylon support block, pivot, film vertical plate and limit block protrusion.Nylon support block is rotatably connected on first support column by pivot, first support column and second support column are vertically connected on annular base, and the interval between the two forms the space position of the space position of annular fuel pipe, limit block protrusion is arranged on first support column to form the structure of the angle of nylon support block is limited to turn over.Detection, fuel pipe is placed one by one from below to above, and is taken out one by one from above to below after completion of detection.The application avoids direct contact between annular fuel pipe, film placement operation is simple during detection, avoids image interference between annular fuel pipe, detection efficiency is high, and detection result is accurate.

Description

Technical Field

[0001] This invention belongs to the field of X-ray radiographic inspection technology, and in particular to an auxiliary device and inspection method for non-contact X-ray radiographic inspection of aircraft engine fuel pipes. Background Technology

[0002] The fuel pipe has a ring-shaped structure with 24 sets of inner and outer saddles evenly distributed along its circumference. The saddles and welds require X-ray inspection. As the fuel pipe is a critical component, contact and collisions between parts must be strictly avoided during processing and inspection. X-ray inspection uses a radiation source to expose the parts 360° around the center. To improve the efficiency of inspecting large batches of parts, multiple parts need to be stacked for X-ray imaging. However, contact and collisions between parts during placement and inspection are unavoidable, and the placement of the film using clamping and binding methods is cumbersome and inefficient. Furthermore, the close contact between stacked fuel pipes can cause interference between the upper and lower saddles during X-ray imaging, resulting in abnormal images that obscure the true image of the parts, negatively impacting inspection accuracy and product quality. Summary of the Invention

[0003] This invention discloses a non-contact X-ray inspection device and method for X-ray radiographic inspection of saddle-shaped fuel lines and welds. Specifically, it enables non-contact 360° circumferential exposure between multiple annular fuel lines, avoiding direct contact and meeting the protection requirements for these lines. Furthermore, the invention simplifies film placement during inspection and allows simultaneous radiography of multiple annular fuel lines, improving inspection efficiency. Even further, a certain gap is maintained between adjacent annular fuel lines during inspection, reducing image interference and providing a more accurate reflection of the internal quality of the annular fuel lines.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A non-contact X-ray detection device, comprising:

[0006] Circular base;

[0007] First support column and second support column, one first support column and one second support column form a group, multiple groups of first support columns and second support columns are vertically connected to the upper end face of the annular base, there is a gap between the first support columns and second support columns in the group, and the gaps of different groups are distributed on a circle with the center of the annular base as the center.

[0008] The limiting block protrusion is connected to the first support column. There are two limiting block protrusions in each group, and multiple groups of limiting block protrusions are distributed at intervals along the length direction of the first support column.

[0009] A rotating shaft is connected to the first support column and located in the interval between two adjacent sets of limiting block protrusions. Multiple rotating shafts are distributed along the length direction of the first support column, and the line connecting the multiple rotating shafts passes through the interval between two limiting block protrusions in each set of limiting block protrusions.

[0010] A nylon support block, rotatably connected to a rotating shaft, includes:

[0011] The tail section is in contact with the first limiting block protrusion in the same group of limiting block protrusions or with the annular fuel pipe;

[0012] The head contacts the second limiting block protrusion in the same group of limiting block protrusions, and the rotational torque generated by the weight of the head relative to the rotating shaft is greater than the rotational torque generated by the weight of the tail relative to the rotating shaft, so that the head of the nylon support block contacts the second limiting block protrusion in the group of limiting block protrusions located below the nylon support block when no external force is applied, while the tail is away from the first limiting block protrusion in the same group of limiting block protrusions.

[0013] A film stand is placed vertically on the end face of an annular base and is located outside the circumference of the interval between the first support column and the second support column.

[0014] Furthermore, an X-ray source is placed at the center of the annular base.

[0015] Furthermore, there are at least three sets of the first and second support columns.

[0016] Furthermore, the limiting block protrusion is a cylinder, and the axis of the cylinder is perpendicular to the first supporting column.

[0017] Furthermore, there are multiple film support plates, which are distributed at intervals on the same circumference with the center of the annular base as the center.

[0018] Furthermore, the line connecting the head and the pivot of the nylon support block forms a 120° angle with the line connecting the tail and the pivot.

[0019] Furthermore, the head of the nylon support block has a limiting groove that mates with the second limiting block protrusion in the same group of limiting block protrusions, and the tail of the nylon support block includes a plane that contacts the first limiting block protrusion in the same group of limiting block protrusions or contacts the annular fuel pipe.

[0020] Furthermore, the length of the head of the nylon support block is greater than the distance between the heads of two adjacent nylon support blocks, so that the lower nylon support block can contact the head of the upper nylon support block during the flipping process.

[0021] Option 1: A non-contact X-ray detection method, employing the aforementioned non-contact X-ray detection device, and including the following steps:

[0022] Step 1: Select multiple nylon support blocks at the same height above the ring base as the starting installation position;

[0023] Step 2: Place the first annular fuel pipe into the gap between the first support column and the second support column until the annular fuel pipe presses against the tail of the multiple nylon support blocks at the initial installation position, and the installation is in place when the head of the nylon support block is in contact with the protrusion of the limiting block above it.

[0024] Step 3: Flip over the multiple nylon support blocks located above and closest to the starting installation position until the head of the nylon support block is in contact with the protrusion of the limiting block above it. Then, insert the second annular fuel pipe into the gap between the first support column and the second support column until the annular fuel pipe is in contact with the tail of the multiple nylon support blocks located above and closest to the starting installation position.

[0025] Step four, repeat step three to complete the installation of the remaining annular fuel line;

[0026] Step 5: Place the film between the film stand and the annular fuel pipe, place the X-ray source at the center of the annular base and turn on the X-ray source, and then begin X-ray inspection of all annular fuel pipes.

[0027] Option 2: Using the aforementioned non-contact X-ray detection device, where the length of the nylon support block head is greater than the distance between the heads of two adjacent nylon support blocks, and including the following steps:

[0028] Step 1: Select multiple nylon support blocks at the same height above the ring base as the starting installation position;

[0029] Step 2: Place the first annular fuel pipe into the gap between the first support column and the second support column until the annular fuel pipe presses against the tail of the multiple nylon support blocks at the initial installation position. At this time, the tail of the multiple nylon support blocks located above and closest to the initial installation position will be flipped at an angle under the pushing action of the heads of the multiple nylon support blocks at the initial installation position.

[0030] Step 3: Place the second annular fuel pipe into the gap between the first support column and the second support column until the annular fuel pipe is attached to the tail of the multiple nylon support blocks above and closest to the starting installation position, and the head of the nylon support block is attached to the protrusion of the limiting block.

[0031] Step four, repeat step three to complete the installation of the remaining annular fuel line;

[0032] Step 5: Place the film between the film stand and the annular fuel pipe, place the X-ray source at the center of the annular base and turn on the X-ray source, and then begin X-ray inspection of all annular fuel pipes.

[0033] In both Option 1 and Option 2, the initial installation position can be the bottommost nylon support block, or any other nylon support block at the same height.

[0034] The difference between Option 1 and Option 2 is that in Option 1, the nylon support block needs to be manually flipped before the next annular fuel pipe is inserted, so that its tail can be flipped to a position that can support the annular fuel pipe. Option 2 does not require manual flipping of the nylon support block. Instead, when the previous annular fuel pipe is placed, the head of the nylon support block is flipped, and then the head of the nylon support block above it is automatically pushed by the head of the previous nylon support block. Finally, the linkage process is realized, which flips the tail of the nylon support block above the previous annular fuel pipe by an angle, so that the next annular fuel pipe can be placed on the tail that has been flipped by an angle.

[0035] In this invention, not only does the annular fuel pipe interact with the nylon support block, but adjacent nylon support blocks also interact to achieve sequential linkage, so that the installation and placement of the annular fuel pipe can be carried out in an orderly manner.

[0036] Compared with existing technologies, the non-contact X-ray inspection device of this invention effectively avoids direct contact between multiple annular fuel pipes when performing X-ray radiographic inspection of the saddle seat and weld of fuel pipes, and allows for rapid film preparation while meeting the protection requirements of the parts and improving inspection efficiency. Furthermore, because a separating gap is formed between two adjacent annular fuel pipes (this gap is formed by the tail ends of two adjacent nylon support blocks), no interference images are generated between the annular fuel pipes during radiography, more realistically reflecting the internal quality of the annular fuel pipes, which helps ensure accurate inspection results and product quality compliance. Attached Figure Description

[0037] Figure 1 This is a front view of the non-contact X-ray detection device of the present invention;

[0038] Figure 2 This is a top view of the non-contact X-ray detection device of the present invention;

[0039] Figure 3 This is a perspective view of the non-contact X-ray detection device of the present invention;

[0040] Figure 4 yes Figure 3 A magnified view of part A in the image;

[0041] In the diagram: 1. Circular base, 2. First support column, 3. Second support column, 4. Nylon support block, 5. Bolt, 6. Film plate, 7. Limiting block protrusion. Detailed Implementation

[0042] The present invention will be further described below with reference to specific embodiments, but it should not be construed as limiting the scope of the subject matter of the present invention to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0043] like Figures 1-4 As shown, this invention presents an auxiliary device for X-ray radiographic inspection of fuel pipe saddle seats and welds. The device includes an annular base 1, a first support column 2, a second support column 3, nylon support blocks 4, bolts 5 serving as a pivot, a film plate 6, and limiting block protrusions 7. The nylon support blocks 4 are rotatably connected to the first support column 2. As the annular fuel pipe to be inspected is placed, the nylon support blocks 4, the annular fuel pipe, and adjacent nylon support blocks 4 interact with each other, changing their rotational state, thereby achieving non-contact placement of the annular fuel pipes.

[0044] A set of first support columns 2 and second support columns 3 are fixed on the annular base 1 at 120° intervals along a circumference, for a total of 3 sets. Figure 2 As shown, there are three first support columns 2, distributed on the first circumference, and fixed to the annular base 1 by bolts below. There are also three second support columns 3, distributed on the second circumference, similarly fixed to the annular base 1 by bolts below. Both the first and second circumferences are circles centered on the center of the annular base 1, but the diameter of the second circumference is smaller than the diameter of the first circumference. The gap between the first support columns 2 and the second support columns 3 is used to accommodate an annular fuel pipe.

[0045] like Figure 4The first support column 2 has five nylon support blocks 4 arranged in a straight line from bottom to top. Each nylon support block 4 consists of two parts: a head and a tail. The head and tail form a 120° angle (this angle is not limited to 120°; it can be increased or decreased as long as it ensures that the nylon support block 4 does not affect the placement of the annular fuel pipe when it rotates around the pivot. In this embodiment, 120° is used because it reduces the rotation angle of the nylon support block 4 and ensures that adjacent nylon support blocks 4 do not affect each other when they rotate). The nylon support block 4 is rotatably mounted on the first support column 2 by a bolt 5 as a pivot. The specific shape of the nylon support block 4 is not limited, but it must ensure that its tail has a flat surface for placing the annular fuel pipe. The shape and length of the head and tail must be such that when the nylon support block 4 rotates, it can respectively contact the upper or lower limiting block protrusion 7 of the nylon support block 4. Figure 4 The design incorporates 10 cylindrical limiting block protrusions 7, with each pair of protrusions 7 positioned between two adjacent nylon support blocks 4. Each nylon support block 4 has a groove at its head to mate with the limiting block protrusions 7. The purpose of designing two protrusions 7 in each group is that one is used to limit and support the head of the nylon support block 4, while the other is used to limit and support the tail. The length of the head of the nylon support block 4 (the straight-line distance from the end of the head to the pivot, equivalent to the radius of rotation) is greater than the distance between the heads of two adjacent nylon support blocks 4 (the straight-line distance when the two heads are parallel), allowing the lower nylon support block 4 to contact the head of the upper nylon support block 4 during the flipping process and flip it at a certain angle, preparing for the next placement of the annular fuel pipe, ultimately forming a linkage.

[0046] like Figure 2 and Figure 3 Six film plates 6 are evenly distributed on the annular base 1. The film plates 6 are perpendicular to the annular base 1 and are located outside the first circumference where the first support column 2 is located.

[0047] When performing X-ray examination, refer to Figure 4 The specific implementation steps are as follows:

[0048] 1. Before the annular fuel pipe is placed, the nylon support block 4 is in initial state I (dark color), at which time the head of the nylon support block 4 is in a horizontal state;

[0049] 2. When the first annular fuel pipe is placed, the tail of the bottommost (first layer) nylon support block 4 is pressed down so that the first layer nylon support block 4 reaches its limit position. At this time, since the length of the head of the first layer nylon support block 4 is greater than the distance between the heads of the first and second layers nylon support blocks 4, the first layer nylon support block 4 can contact the head of the second layer nylon support block 4 during the flipping process, thereby lifting the head of the second layer nylon support block 4 and flipping it at an angle, so that the tail of the second layer nylon support block 4 rotates downward at an angle. At this time, the second layer nylon support block 4 is in state II (light color), which is an intermediate state.

[0050] 3. When the second annular fuel pipe is placed, the tail of the second layer nylon support block 4 is pressed down. Similarly, the head of the second layer nylon support block 4 will lift up and flip the head of the third layer nylon support block 4 above it by an angle. At this time, the second layer nylon support block 4 is in state III (white), and the nylon support block 4 has reached the limit state (its head has pressed against the limit block protrusion 7), and the tail will no longer rotate downward.

[0051] 4. Continue in this manner, placing all remaining annular fuel lines one by one from bottom to top. After all annular fuel lines are in place, place the film between the film stand 6 and the annular fuel lines.

[0052] 5. A circumferential X-ray machine is used for radiography, with the X-ray source placed in the central hollow area of ​​the annular base 1. Figure 3 (The central ring shown).

[0053] 6. After radiography is completed, remove the annular fuel pipes from top to bottom. The tail of the nylon support block 4 loses the pressure of its own weight from the annular fuel pipes and automatically flips back to state I (dark color). At this time, the tail of the nylon support block 4 is lifted upwards, and the annular fuel pipes below can be removed in this manner, and so on.

[0054] This invention utilizes the placement of annular fuel tubes to rotate nylon support blocks 4 with limiting mechanisms. These blocks interact and restrict each other, ensuring that the three corresponding sets of nylon support blocks 4 stably support each annular fuel tube. Direct contact between adjacent annular fuel tubes is avoided, meeting product protection requirements and improving testing efficiency. Simultaneously, the gaps between adjacent annular fuel tubes prevent interference images during radiographic testing, providing a more accurate reflection of the internal quality of the annular fuel tubes and contributing to accurate product testing and final welding quality.

[0055] Contents not described in detail in this specification are prior art known to those skilled in the art. Although illustrative specific embodiments of the invention have been described above to facilitate understanding by those skilled in the art, it should be understood that the invention is not limited to the scope of the specific embodiments. Various modifications are readily apparent to those skilled in the art as long as they fall within the spirit and scope of the invention as defined and determined by the appended claims, and all inventions utilizing the concept of this invention are protected.

Claims

1. A non-contact X-ray detection device, characterized in that, include: Annular base (1); The first support column (2) and the second support column (3) form a group. Multiple groups of first support columns (2) and second support columns (3) are vertically connected to the upper surface of the annular base (1). There is a gap between the first support column (2) and the second support column (3) in the group. The gaps between different groups are distributed on a circle with the center of the annular base (1) as the center. Limiting block protrusions (7) are connected to the first support column (2). There are two limiting block protrusions (7) in each group, and multiple groups of limiting block protrusions (7) are distributed at intervals along the length direction of the first support column (2). A rotating shaft is connected to the first support column (2) and located in the interval between two adjacent sets of limiting block protrusions (7). Multiple rotating shafts are distributed along the length direction of the first support column (2), and the line connecting the multiple rotating shafts passes through the interval between two limiting block protrusions (7) in each set of limiting block protrusions (7). Nylon support block (4), which is rotatably connected to a rotating shaft, includes: The tail section is in contact with the first limiting block protrusion (7) in the same set of limiting block protrusions (7) or with the annular fuel pipe; The head is in contact with the second limiting block protrusion (7) in the same set of limiting block protrusions (7), and the rotational torque generated by the weight of the head relative to the rotating shaft is greater than the rotational torque generated by the weight of the tail relative to the rotating shaft, so that the head of the nylon support block (4) is in contact with the second limiting block protrusion (7) in the set of limiting block protrusions (7) located below the nylon support block (4) under the action of non-external force, while the tail is away from the first limiting block protrusion (7) in the same set of limiting block protrusions (7). Film stand (6), the film stand (6) is placed vertically on the end face of the annular base (1) and is located outside the circumference of the interval between the first support column (2) and the second support column (3); An X-ray source is placed at the center of the annular base (1); There are at least three sets of the first support column (2) and the second support column (3); There are multiple film uprights (6), and the multiple film uprights (6) are distributed at intervals on the same circumference with the center of the annular base (1) as the center; The head of the nylon support block (4) has a limiting groove that mates with the second limiting block protrusion (7) in the same set of limiting block protrusions (7), and the tail of the nylon support block (4) includes a plane that contacts the first limiting block protrusion (7) in the same set of limiting block protrusions (7) or contacts the annular fuel pipe.

2. The non-contact X-ray detection device according to claim 1, characterized in that: The limiting block protrusion (7) is a cylinder, and the axis of the cylinder is perpendicular to the first support column (2).

3. The non-contact X-ray detection device according to claim 1, characterized in that: The line connecting the head and the pivot of the nylon support block (4) forms a 120° angle with the line connecting the tail and the pivot.

4. The non-contact X-ray detection device according to claim 1, characterized in that: The length of the head of the nylon support block (4) is greater than the distance between the heads of two adjacent nylon support blocks (4), so that the lower nylon support block (4) can contact the head of the upper nylon support block (4) during the flipping process.

5. A non-contact X-ray detection method, characterized in that, The non-contact X-ray detection device according to claim 1 is used, and includes the following steps: Step 1: Select multiple nylon support blocks (4) located at the same height above the annular base (1) as the starting installation position; Step 2: Place the first annular fuel pipe into the gap between the first support column (2) and the second support column (3) until the annular fuel pipe presses against the tail of the multiple nylon support blocks (4) at the initial installation position, and install it in place when the head of the nylon support block (4) is in contact with the protrusion (7) of the limiting block above it. Step 3: Flip the multiple nylon support blocks (4) located above and closest to the starting installation position until the head of the nylon support block (4) is in contact with the limit block protrusion (7) above it. Then, place the second annular fuel pipe into the gap between the first support column (2) and the second support column (3) until the annular fuel pipe is in contact with the tail of the multiple nylon support blocks (4) located above and closest to the starting installation position. Step four, repeat step three to complete the installation of the remaining annular fuel line; Step 5: Place the film between the film stand (6) and the annular fuel pipe, place the X-ray source at the center of the annular base (1) and turn on the X-ray source, and then start X-ray inspection of all annular fuel pipes.

6. A non-contact X-ray detection method, characterized in that, The non-contact X-ray detection device according to claim 4 is used, and includes the following steps: Step 1: Select multiple nylon support blocks (4) located at the same height above the annular base (1) as the starting installation position; Step 2: Place the first annular fuel pipe into the gap between the first support column (2) and the second support column (3) until the annular fuel pipe presses against the tail of the multiple nylon support blocks (4) at the initial installation position. At this time, the tail of the multiple nylon support blocks (4) located above and closest to the initial installation position will be flipped at an angle by the pushing action of the head of the multiple nylon support blocks (4) at the initial installation position. Step 3: Place the second annular fuel pipe into the gap between the first support column (2) and the second support column (3) until the annular fuel pipe is attached to the tail of the multiple nylon support blocks (4) above and closest to the starting installation position, and the head of the nylon support block (4) is attached to the protrusion of the limiting block (7). Step four, repeat step three to complete the installation of the remaining annular fuel line; Step 5: Place the film between the film stand (6) and the annular fuel pipe, place the X-ray source at the center of the annular base (1) and turn on the X-ray source, and then start X-ray inspection of all annular fuel pipes.

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