Central symmetry device for circular seam radiographic inspection of end cover of boiler header without observation hole
By designing a symmetrical device for the end cover of the ring seam of the ray detection center of the boiler container without observation holes, the problem of difficulty in aligning the radiation detection center is solved, and efficient and accurate detection results are achieved, which simplifies the operation process and reduces economic costs.
Patent Information
- Application Number
- CN202421906424.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-08-08
AI Technical Summary
In the prior art, the alignment of the ray detection center of the end cover of the boiler container is difficult, resulting in low detection efficiency and poor imaging effect. Traditional methods require multiple transillumination, which wastes time and economic costs.
A central symmetry device for detecting the ring seam ray of the end cover of the boiler container without observation hole is designed, including a support member, a soft spring fixing mechanism and an adjustment mechanism. The center positioning is achieved through a flexible sliding wheel, adapting to the container of different inner diameters, simplifying operation and improving positioning accuracy.
The center alignment of ray detection is realized, the number of pass-throughs is reduced, the detection efficiency and imaging quality are improved, and time and economic costs are saved.
Smart Images
Figure CN223166648U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of industrial non-destructive testing ray flaw detection, in particular to a central symmetry device for ray detection of the circumferential seam of the end cover of a boiler header without an observation hole. Background Technique
[0002] In actual industrial ray detection, ray detection is required for the circumferential seam at the end cover of the boiler header without an observation hole. However, it is difficult to align the center during the detection process because the source conduit is relatively soft and there is no support in the center. There is also a certain distance between the circumferential seam of the header end cover and the manhole. During the ray detection process, accurate alignment of the center of the circumferential seam of the header end cover is required for central exposure detection, and this process is particularly important.
[0003] For traditional ray detection of the circumferential seam of the header, when central alignment cannot be achieved, double-wall single-image radiography is adopted. This radiography method requires multiple source placements. One header needs to be radiographed 8 - 10 times. Not only does each radiography require moving the ray source, but also the blackening of the film is uneven and the imaging effect is not good. This is a waste of both time and economic cost. If central alignment is selected, the entire weld can be radiographed once, and the blackening of the entire weld is uniform, which not only meets the detection standard but also improves the detection efficiency. Therefore, central alignment detection of the circumferential seam of the header end cover is of great significance for inspecting the weld quality and efficiency.
[0004] When performing ray detection on the circumferential seam of the header end cover, central alignment can improve the quality and efficiency of the film. Then, finding a central alignment device that can not only align very simply and conveniently, but also be removed from the handhole after alignment and then reused, and for headers with different inner diameters, the positioning device can be adjusted according to different sizes. Such a device is very helpful for improving the detection efficiency and will also increase the economic benefits. Finding a ray detection device that is both convenient and practical and can accurately center-align has important application significance. Content of the Utility Model
[0005] The purpose of the utility model is to provide a central symmetry device for ray detection of the circumferential seam of the end cover of a boiler header without an observation hole in view of the deficiencies of the prior art, so as to solve the problems raised in the background technique.
[0006] To achieve the above purpose, the utility model provides the following technical solution: A central symmetry device for ray detection of the circumferential seam of the end cover of a boiler header without an observation hole, including support members. There are two support members, and source positioning holes are provided on the two support members. Three soft spring fixing mechanisms are evenly installed on the two support members, and soft springs are installed on the soft spring fixing mechanisms. An adjustment mechanism is installed on the support member, and a flexible sliding wheel is installed on the adjustment mechanism.
[0007] As a preferred technical solution of the present utility model, the appearance structure of the support member is a support plate extending at intervals of 120°.
[0008] As a preferred technical solution of the present utility model, the source positioning hole is opened at the center of the support member, and the source positioning hole is circular.
[0009] As a preferred technical solution of the present utility model, there are three soft spring fixing mechanisms, which are installed on the support plates extending from the support member at intervals of 120°.
[0010] As a preferred technical solution of the present utility model, both ends of the three soft springs are respectively installed on the corresponding soft spring fixing mechanisms on two support members.
[0011] As a preferred technical solution of the present utility model, the adjusting mechanism includes an adjusting bolt, a fastening nut and a mounting plate, and the flexible sliding wheel is installed on the mounting plate.
[0012] As a preferred technical solution of the present utility model, mounting grooves matching with the mounting plate are opened on the support plates extending from the support member at intervals of 120°. The adjusting bolt penetrates through the mounting groove opened on the support plate from one side of the support plate extending from the support member at intervals of 120° and extends to the other side, and the fastening nut rotates on the outer ring of the other side of the adjusting bolt.
[0013] Compared with the prior art, the present utility model provides a central symmetry device for the circumferential seam ray detection of the header end cover of a boiler without an observation hole, and has the following beneficial effects:
[0014] 1. For the central symmetry device for the circumferential seam ray detection of the header end cover of a boiler without an observation hole, after adjusting the central positioning device for the circumferential seam ray detection of the header end cover of a boiler without an observation hole according to the inner diameter size of the header, it can be fixed inside the header. As long as the source conduit is directly inserted into the source positioning hole, the central positioning process is completed. This innovative device can complete the central positioning activity that could not be completed before, with simple operation, high precision and strong applicability.
[0015] 2. For the central symmetry device for the circumferential seam ray detection of the header end cover of a boiler without an observation hole, when this positioning device is directly placed inside the header during use and can be taken out when not in use, it is both convenient and has no environmental pollution. The blackening degree of the obtained negative film is uniform, and the detection of the entire circumferential seam can be completed by one exposure. The central positioning device for the circumferential seam of the header end cover can directly position the center of the circumferential seam of the end cover, saving the time for flaw detection, improving economic benefits and liberating the labor force. Description of the Drawings
[0016] Figure 1 It is a schematic structural diagram of the support member of the present utility model;
[0017] Figure 2 This is a schematic side view structure diagram of the present utility model;
[0018] Figure 3 This is a schematic top view structure diagram of the present utility model.
[0019] Reference numerals: 1, flexible sliding wheel; 2, soft spring; 3, source positioning hole; 4, support member; 5, adjusting bolt; 6, adjusting mechanism; 7, soft spring fixing mechanism; 8, fastening nut. Specific embodiments
[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0021] Please refer to Figures 1 - 3 , in this implementation: A central symmetry device for radiographic inspection of the circumferential seam of the end cover of a boiler header without an observation hole, including a support member 4. There are two support members 4, and source positioning holes 3 are provided on the two support members 4. Three soft spring fixing mechanisms 7 are evenly installed on the two support members 4, and soft springs 2 are installed on the soft spring fixing mechanisms 7. An adjusting mechanism 6 is installed on the support member 4, and a flexible sliding wheel 1 is installed on the adjusting mechanism 6. The flexible sliding wheel 1 can be adjusted or replaced according to the size of the header, and is adjusted or replaced through a fastening nut 8 and an adjusting bolt 5 and fixed thereto.
[0022] In this embodiment, the external structure of the support member 4 is a support plate extending at intervals of 120°. The source positioning hole 3 is opened at the exact center of the support member 4, and the source positioning hole 3 is circular. There are three soft spring fixing mechanisms 7, which are installed on the support plates of the support member 4 extending at intervals of 120°. The two ends of the three soft springs 2 are respectively installed on the corresponding soft spring fixing mechanisms 7 on the two support members 4. This connection can ensure that the radiation source passes through the source positioning hole 3 and then enters after the header handhole is deformed, and returns to a straight connection after entering. The adjusting mechanism 6 includes an adjusting bolt 5, a fastening nut 8 and a mounting plate. The flexible sliding wheel 1 is installed on the mounting plate. Mounting grooves matching the mounting plate are opened on the support plates of the support member 4 extending at intervals of 120°. The adjusting bolt 5 penetrates through the mounting groove opened on the support plate on one side of the support member 4 extending at intervals of 120° and extends to the other side, and the fastening nut 8 rotates on the outer ring on the other side of the adjusting bolt 5. When performing radiographic inspection on the circumferential seam of the header end cover without an observation hole, after measuring the inner diameter size of the header circumferential seam, the flexible sliding wheel 1 can be adjusted through the adjusting mechanism 6, or a flexible sliding wheel 1 of a different size can be replaced, so that the hollow ring of the central source positioning device is exactly at the exact center of the entire header inner diameter, and the entire positioning device is placed into the header from the side handhole of the header.
[0023] The working principle and usage process of the present utility model: This central symmetry device for radiographic inspection of the circumferential seam of the header end cover of a boiler without an observation hole. The central positioning device for radiographic inspection of the circumferential seam of the header end cover of a boiler without an observation hole consists of two support members 4 connected in a plane by three soft springs 2 according to the soft spring fixing mechanism 7. The adjusting bolt 5, the fastening nut 8 and the mounting plate on the adjusting mechanism 6 can adjust the detachable flexible sliding wheel 1. After the entire central alignment device is finally connected, the source positioning holes 3 are on a straight line.
[0024] During the actual radiographic inspection process, adjust the adjusting bolt 5 and the fastening nut 8 according to the inner diameter size of the header of the boiler without an observation hole to adjust the flexible sliding wheel 1 to a flexible sliding wheel 1 that can meet the inner wall size of the header. If necessary, the flexible sliding wheel 1 can be replaced. Then, insert the radiation source and the source conduit through the source positioning hole 3, so that the front section of the radiation source just gets stuck at the position of the source positioning hole 3 opened on the support member 4. Then, deform the entire positioning device through the soft spring 2 and enter the header from the side handhole of the header, and then return to a straight line in the header and push it to the front section of the circumferential seam of the header end cover, and perform exposure at the center.
[0025] When the radiographic inspection is completed, take out the central alignment device for radiographic inspection of the circumferential seam of the header end cover of the boiler without an observation hole from the header handhole after deforming the soft spring 2, take out the radiation source and the source conduit from the source positioning hole 3. For the next inspection, the flexible sliding wheel 1 can be adjusted or replaced through the adjusting bolt 5 and the fastening nut 8 in the adjusting mechanism 6, and repeat the above steps to inspect the next circumferential seam of the header end cover.
[0026] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A central symmetry device for radiographic inspection of the circumferential seam of the header end cover of a boiler without an observation hole, comprising a support member (4), characterized in that: There are two of the said supporting members (4), and source positioning holes (3) are provided on the two supporting members (4). Three soft spring fixing mechanisms (7) are evenly installed on the two supporting members (4), and a soft spring (2) is installed on the soft spring fixing mechanism (7). An adjusting mechanism (6) is installed on the supporting member (4), and a flexible sliding wheel (1) is installed on the adjusting mechanism (6).
2. The central symmetry device for radiographic testing of the circumferential weld of the header end cover of a boiler without an observation hole according to claim 1, wherein: The external structure of the supporting member (4) is a support plate extending at an interval of 120°.
3. A central symmetry device for radiographic inspection of the circumferential weld of the header end cover of a boiler without an observation hole according to claim 1, characterized in that: The source positioning hole (3) is opened at the center of the supporting member (4), and the source positioning hole (3) is circular.
4. A central symmetry device for radiographic inspection of the circumferential weld of the header end cover of a boiler without an observation hole according to claim 1, characterized in that: There are three of the soft spring fixing mechanisms (7), and they are installed on the support plates extending from the supporting member (4) at an interval of 120°.
5. A central symmetry device for radiographic testing of the circumferential weld of the header end cover of a boiler without an observation hole according to claim 1, characterized in that: Both ends of the three soft springs (2) are respectively installed on the corresponding soft spring fixing mechanisms (7) on the two supporting members (4).
6. A center symmetry device for radiographic inspection of the circumferential seam of the header end cover of a boiler without an observation hole according to claim 1, characterized in that: The adjusting mechanism (6) includes an adjusting bolt (5), a fastening nut (8) and a mounting plate, and the flexible sliding wheel (1) is installed on the mounting plate.
7. A center symmetry device for radiographic inspection of the circumferential seam of the header end cover of a boiler without an observation hole according to claim 6, characterized in that: Mounting grooves matching the mounting plate are provided on the support plates extending from the supporting member (4) at an interval of 120°. The adjusting bolt (5) penetrates through the mounting groove provided on the support plate on one side of the support plate extending from the supporting member (4) at an interval of 120° and extends to the other side, and the fastening nut (8) rotates on the outer ring on the other side of the adjusting bolt (5).