A portable device for repairing local pits of a reflector of a large radio telescope

Abstract

This utility model relates to a portable device for repairing localized dents on the reflector surface of a large radio telescope. The device includes: a correction plate assembly, a correction pin assembly, a secondary drive assembly, a support assembly, and a main drive assembly. The correction plate assembly is connected and positioned to the reflector surface of the large radio telescope by a correction plate. The correction pin assembly is disposed between the correction plate assembly and the secondary drive assembly, and works with the correction plate assembly to repair localized dents on the reflector surface panel of the large radio telescope. The secondary drive assembly is disposed below the support assembly for adjusting the position of the correction pin assembly. The main drive assembly is disposed above the support assembly for driving the movement of the correction pin assembly. This utility model's device restores the original surface shape of the reflector surface panel of the large radio telescope by reverse pulling and correcting the locally plastically deformed surface.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical manufacturing technology, specifically relating to a portable device for repairing localized pits on the reflector surface of a large radio telescope. Background Technology

[0002] The reflector of the Five-hundred-meter Aperture Spherical Radio Telescope (FAST) is one of the most important components of the telescope. Its function is to reflect radio signals to a focal point so that the receiver can receive and record the signals. The accuracy of the reflector's surface shape directly affects the reflection efficiency of the radio signals, thus affecting the telescope's performance. The FAST reflector consists of multiple reflector units, each of which is assembled from multiple sub-unit panels. To reduce the weight of the reflector units, FAST uses perforated aluminum plates as the material for the panels, resulting in relatively low rigidity and strength, especially in its ability to withstand impact loads perpendicular to the panel direction. However, during the telescope's operation, hail has significantly impacted the reflector unit panels, specifically by impacting each sub-unit panel, creating several dents, with some sub-unit panels having even more dents, and the dents reaching a severe depth. These plastic deformation dents caused by hail will lead to a certain degree of reduction in the reflection efficiency, affecting the telescope's performance. Therefore, the problem of localized dents commonly found on the reflectors of large radio telescopes urgently needs to be addressed. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a portable device for repairing localized pits on the reflector surface of the FAST telescope, thus solving the common problem of localized pits on the reflector surface of the FAST telescope.

[0004] A portable device for repairing localized pits on the reflector surface of a large radio telescope, the device comprising: a correction plate assembly, a correction pin assembly, a secondary drive assembly, a support assembly, and a main drive assembly, wherein...

[0005] The correction plate assembly is connected and positioned to the large radio telescope reflector by the correction panel; the correction pin assembly is disposed between the correction plate assembly and the auxiliary drive assembly, and is used to repair local pits on the large radio telescope reflector.

[0006] The secondary drive assembly is located at the lower part of the support assembly and is used to adjust the position of the corrective pin assembly;

[0007] The main drive component is located on the upper part of the support component and is used to drive the corrective pin component to move.

[0008] In addition to the aspects and any possible implementations described above, a further implementation is provided in which the correction plate assembly includes a correction plate with a concave arc surface and positioning pins, wherein a plurality of through holes are provided on the correction plate, the size and distribution of which are consistent with the size and distribution of the holes in the panel to be corrected; and a plurality of the positioning pins are disposed around the periphery of the correction plate.

[0009] In addition to the aspects and any possible implementations described above, a further implementation is provided in which the corrective pin assembly includes corrective pins and a sliding plate, the sliding plate being provided with a plurality of through holes corresponding to the number of corrective pins, and the arrangement pattern of the through holes being the same as the arrangement pattern of the through holes on the corrective plate.

[0010] In addition to the aspects described above and any possible implementation, a further implementation is provided in which the corrective pin assembly further includes a spring, the corrective pin is an irregular cylindrical pin including a guide section, a pull-out section and an anti-pull-out section, the guide section is conical, the pull-out section is an irregular shape obtained by cutting a portion of the cylindrical part of the cylindrical pin according to a certain size hole diameter, the anti-pull-out section is a milled flat stepped shaft, and the milling direction of the anti-pull-out section is perpendicular to the cutting direction of the pull-out section; the spring is disposed on the pull-out section between the anti-pull-out section and the slide plate.

[0011] In addition to the aspects and any possible implementations described above, a further implementation is provided in which the secondary drive assembly includes a positioning plate, a cover plate, and a secondary drive cylinder; the cover plate is disposed on the upper part of the positioning plate, and the cover plate and the positioning plate form a space; the secondary drive cylinder is mounted on the side of the positioning plate, and its piston is connected to the slide plate.

[0012] In addition to the aspects and any possible implementations described above, a further implementation is provided in which the support assembly includes a support plate and support columns, the main drive assembly is disposed on the upper part of the support plate, and a plurality of the support columns are simultaneously connected to the support plate and the correction plate.

[0013] In addition to the aspects and any possible implementations described above, a further implementation is provided in which the main drive assembly is a main drive cylinder disposed on the support plate, and its piston is connected to the top of the cover plate.

[0014] In addition to the aspects and any possible implementations described above, a further implementation is provided in which there are a plurality of locating pins and the through holes on the slide plate form a clearance fit with the drawing section.

[0015] In addition to the aspects and any possible implementations described above, a further implementation is provided in which the positioning plate is provided with a rectangular through hole, the sliding plate is disposed in the rectangular through hole, the cover plate is provided with an elongated groove, the size of the groove is greater than or equal to the milled flat size of the pull-out section, and the pull-out section is embedded in the corresponding elongated groove.

[0016] In addition to the aspects described above and any possible implementation, a further implementation is provided in which the given dimension is 5 mm.

[0017] Beneficial effects of this utility model

[0018] This invention provides a portable device for repairing localized dents on the reflector surface of a large radio telescope. The device includes: a correction plate assembly, a correction pin assembly, a secondary drive assembly, a support assembly, and a main drive assembly. The correction plate assembly is connected and positioned to the reflector surface of the large radio telescope by a correction plate. The correction pin assembly is disposed between the correction plate assembly and the secondary drive assembly for repairing localized dents on the reflector surface. The secondary drive assembly is located below the support assembly for adjusting the position of the correction pin assembly. The main drive assembly is located above the support assembly for driving the movement of the correction pin assembly. This invention uses a cylinder as the drive, powered by a portable centralized air source, improving system reliability. The device restores the original surface shape by reverse-pull correction of the locally plastically deformed aluminum reflector surface of the large radio telescope. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the device structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the cover plate of this utility model;

[0021] Figure 3 This is a schematic diagram of the corrective pin of this utility model. Detailed Implementation

[0022] To better understand the technical solution of this utility model, the content of this utility model includes, but is not limited to, the specific embodiments described below. Similar technologies and methods should be considered within the scope of protection of this utility model. To make the technical problem to be solved, the technical solution, and the advantages of this utility model clearer, a detailed description will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0023] It should be understood that the embodiments described in this utility model are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The singular forms “a,” “the,” and “the” used in the embodiments of this utility model and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0025] This utility model provides a portable device for repairing localized pits on the reflector surface of a large radio telescope. The device includes: a correction plate assembly, a correction pin assembly, a secondary drive assembly, a support assembly, and a main drive assembly.

[0026] The correction plate assembly is connected and positioned to the large radio telescope's reflector by the correction panel.

[0027] The correction pin assembly is disposed between the correction plate assembly and the secondary drive assembly, and is used to repair local pits on the reflector surface of the large radio telescope;

[0028] The secondary drive assembly is located at the lower part of the support assembly and is used to adjust the position of the corrective pin assembly;

[0029] The main drive component is located on the upper part of the support component and is used to drive the corrective pin component to move.

[0030] Furthermore, the correction plate assembly includes a correction plate with a concave arc surface and positioning pins. Several through holes are provided on the correction plate, and the size and distribution of the holes are consistent with the size and distribution of the holes on the panel being corrected. Several positioning pins are provided around the periphery of the correction plate.

[0031] Furthermore, the corrective pin assembly includes corrective pins and a sliding plate. The sliding plate is provided with a plurality of through holes corresponding to the number of corrective pins, and the arrangement pattern of the through holes is the same as the arrangement pattern of the through holes on the corrective plate.

[0032] Furthermore, the straightening pin assembly also includes a spring. The straightening pin is an irregular cylindrical pin, including a guide section, a pull-out section, and an anti-pull-out section. The guide section is conical. The pull-out section is an irregular shape obtained by cutting part of the cylindrical pin according to a certain size hole diameter. The anti-pull-out section is a milled flat stepped shaft, and the milling direction of the anti-pull-out section is perpendicular to the cutting direction of the pull-out section. The spring is disposed on the pull-out section between the anti-pull-out section and the slide plate.

[0033] Furthermore, the auxiliary drive assembly includes a positioning plate, a cover plate, and an auxiliary drive cylinder; the cover plate is disposed on the upper part of the positioning plate, and the cover plate and the positioning plate form a space; the auxiliary drive cylinder is installed on the side of the positioning plate, and its piston is connected to the slide plate.

[0034] Furthermore, the support assembly includes a support plate and support columns, the main drive assembly is disposed on the upper part of the support plate, and a plurality of the support columns are connected to the support plate and the correction plate simultaneously.

[0035] Furthermore, the main drive assembly is a main drive cylinder, which is disposed on the support plate, and its piston is connected to the top of the cover plate.

[0036] Furthermore, there are several positioning pins, and the through holes on the slide plate form a clearance fit with the drawing section.

[0037] Furthermore, the positioning plate is provided with a rectangular through hole, the sliding plate is disposed in the rectangular through hole, and the cover plate is provided with an elongated groove. The size of the groove is greater than or equal to the milled flat size of the pull-out section, and the pull-out section is embedded in the corresponding elongated groove.

[0038] Specifically, such as Figures 1-3 As shown, this utility model provides a portable device for repairing localized pits on the reflector surface of a large radio telescope. The device includes: a positioning pin 1, a correction plate 2, a sliding plate 3, a support column 4, a main drive cylinder 5, a support plate 6, a cover plate 7, a spring 8, a secondary drive cylinder 9, a positioning plate 10, and a correction pin 11.

[0039] Positioning pin 1 is fastened to the correction plate 2, forming a correction plate assembly. The correction plate 2 is a plate with a concave arc surface on one side. When the large radio telescope reflector panel is used as the correction panel and is tightly attached to this concave arc surface of the correction plate, the concave arc surface can counteract the elastic deformation of the correction panel, reaching the zero point of plastic deformation. The positioning pin 1 is a set of tapered pins with a certain guiding function, arranged around the concave arc surface of the correction plate 2. Several through holes are provided on the correction plate 2, and the correction panel has regularly arranged holes. The size and distribution of the holes in the correction plate 2 are consistent with the size and distribution of the holes in the correction panel. This invention utilizes the regularly arranged holes on the correction panel to fix the relative position of the correction plate 2 and the correction panel.

[0040] The corrective pin assembly includes a corrective pin 11, a spring 8, and a sliding plate 3. The corrective pin 11 is a set of irregularly shaped cylindrical pins with a diameter of 4.5 mm, such as... Figure 3As shown, the cylindrical pin includes a guide section 111, a pull-out section 112, and a pull-out resistant section 113. The guide section 111 is conical; the pull-out section 112 is an irregularly shaped structure formed by cutting a portion of the cylindrical part of the pin according to the panel hole diameter, with the normal direction of the cut portion of the cylinder being the opening direction of the irregularly shaped structure; the pull-out resistant section 113 is a milled stepped shaft, and the milling direction of the pull-out resistant section 113 is perpendicular to the cutting direction of the pull-out section 112; the slide plate 3 is an irregularly shaped plate with several holes of 4-6mm diameter. The preferred diameter of the hole is 4.6mm, and the arrangement of the holes is consistent with the distribution rule of the 4-6mm through holes on the straightening plate 2. The preferred diameter of the through holes on the straightening plate 2 is 5mm. The spring 8 is installed on the pull-out section 112 between the anti-pull-out section 113 of the straightening pin 11 and the slide plate 3. The displacement and force on the slide plate 3 are transmitted to the straightening pin 11 through the spring 8. The function of the spring 8 at this position is to absorb the different displacements caused by the arc surface of the straightening plate 2 during the operation of the straightening pin 11.

[0041] Furthermore, the auxiliary drive assembly includes a positioning plate 10 and an auxiliary drive cylinder 9. The positioning plate 10 is an irregularly shaped component with a rectangular through hole or space, in which a sliding plate 3 is embedded, thus allowing the sliding plate 3 to slide horizontally within the space. The auxiliary drive cylinder 9 is mounted on the side of the positioning plate 10, and its piston is connected to the sliding plate 3 of the straightening pin assembly, for driving the straightening pin assembly to move horizontally.

[0042] The main drive assembly is the main drive cylinder 5, and the support assembly includes a support plate 6 and support columns 4. The support plate 6 is an irregularly shaped plate used to mount the main drive cylinder 5 of the main drive assembly and to serve as a supporting frame. The support columns 4 are a group of cylindrical components, at least four in total, which connect the support plate 6 and the straightening plate 2 to form a square frame structure. The cover plate 7 is an irregularly shaped component that is installed in conjunction with the positioning plate 10. Its interior has elongated grooves 12 corresponding to the distribution of the straightening pins 11. The size of the grooves is greater than or equal to the size of the milled flat section of the anti-pull-out section 113 of the straightening pin. Therefore, the grooves and the milled flat section of the anti-pull-out section 113 of the straightening pin form a clearance fit, which can realize the directional fixation of the pull-out section 112 and the overall horizontal sliding. The main drive cylinder 5 is mounted on the support plate 6, and the piston of the main drive cylinder 5 is connected to the cover plate 7 to drive the straightening pin assembly to move in the vertical direction. The slide plate 3 and the array of corrective pins 11 are arranged in the space between the cover plate 7 and the positioning plate 10; the spring 8 is installed between the slide plate 3 and the corrective pins 11, specifically on the pull-out section 113 of the corrective pin 11 after passing through the through hole of the slide plate 3 and the pull-out section 112 between the slide plate 3, and each corrective pin 11 is provided with spring 8. In the initial state of installation, the spring 8 has a certain amount of compression, which can ensure that the head pull-out section 113 of the corrective pin 11 is pushed into the groove 12 of the cover plate 7 to prevent the corrective pin 11 from rotating axially. In addition, it also ensures that the reaction force of the spring 8 is greater than the corrective force of the panel.

[0043] Therefore, this utility model uses a support column 4 to fasten the straightening plate 2 and the support plate 6 together to form a frame structure; the positioning plate 10 is installed between the straightening plate 2 and the support plate 6 and can slide up and down along the support column 4, that is, slide along the track formed by the support column 4; the cover plate 7 is fastened to the positioning plate 10, forming a certain space inside; the straightening pin 11 is installed on the slide plate 3 and can slide axially along the hole on the slide plate 3; the main drive cylinder 5 is fastened to the support plate 6, and its piston is fastened to the cover plate 7; the auxiliary drive cylinder 9 is fastened to the positioning plate 10, and its piston is fastened to the slide plate 3.

[0044] All irregular shapes mentioned in this utility model are designed according to the structure of the device of this utility model.

[0045] As an embodiment of this utility model, a modified method for repairing localized pits on the reflector surface of a portable large radio telescope is also provided. That is, the device of this utility model can achieve the function of repairing localized pits on the panel. The implementation steps are as follows:

[0046] The first step is to fix the panel with positioning pins 1 around the correction plate 2, and the through holes on the correction plate 2 are matched with the holes on the panel for positioning. The panel is the reflective surface panel of the large radio telescope, which serves as the panel to be corrected.

[0047] The second step is to drive the piston of the main drive cylinder 5 to extend. The extended piston pushes the cover plate 7 and the positioning plate 10 to move vertically downward along the support column 4, thereby pushing the straightening pin 11 through the straightening plate 2 and into the hole of the panel. When the straightening pin 11 passes through the panel to a certain depth, such as 8-10mm, it stops so that the guide section of the straightening pin 11 completely exceeds the bottom of the panel.

[0048] The third step is that the piston of the auxiliary drive cylinder 9 retracts, pulling the slide plate 3 to move horizontally in the positive direction along the groove of the cover plate 7, which is the direction in which the pull section of the straightening pin is cut after installation, thereby driving the straightening pin 11 to move towards its irregular opening direction. It stops when the arc surface of the pull section of the straightening pin 11 is close to the edge of the hole of the straightened panel.

[0049] In the fourth step, the piston of the main drive cylinder 5 retracts, pulling the cover plate 7 and the positioning plate 10 to move vertically upward along the support column 4, which in turn pulls the straightening pin 11 upward. At this time, due to the pulling action of the straightening pin 11's pulling section 112, the panel in the pit area deforms upward until the straightening pin 11 tightly fits the panel with the arc-shaped concave surface of the straightening plate 2 and holds it for a certain period of time, such as 2-3 minutes, so that the panel repair is stable and effective.

[0050] Fifth step, the piston of the main drive cylinder 5 extends, pushing the cover plate 7 and the positioning plate 10 to move vertically downward along the support column. When the straightening pin 11 reaches a certain position, such as 3-5mm, the guide section of the straightening pin 11 completely exceeds the bottom of the panel and then stops.

[0051] The sixth step is that the piston of the auxiliary drive cylinder 9 extends and pushes the slide plate 3 to move horizontally in the negative direction along the groove of the cover plate 7, thereby driving the straightening pin 11 to move horizontally in the opposite direction of its irregular opening, so that the straightening pin returns to the initial horizontal position, that is, it stops when it returns to the initial horizontal position.

[0052] Step 7: The piston of the main drive cylinder 5 retracts, pulling the cover plate 7 and the positioning plate 10 to move vertically upward along the support column, which in turn pulls the straightening pin 11 to move upward. The process stops when the straightening pin 11 returns to the initial vertical position or completely leaves the straightening plate 2.

[0053] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be protected within the scope of the appended claims.

Claims

1. A portable device for repairing localized pits on the reflecting surface of a large radio telescope, characterized in that, The device includes: a correction plate assembly, a correction pin assembly, a secondary drive assembly, a support assembly, and a main drive assembly, wherein... The correction plate assembly is connected and positioned to the large radio telescope reflector by the correction panel; the correction pin assembly is disposed between the correction plate assembly and the auxiliary drive assembly, and is used to repair local pits on the large radio telescope reflector. The secondary drive assembly is located at the lower part of the support assembly and is used to adjust the position of the corrective pin assembly; The main drive component is located on the upper part of the support component and is used to drive the corrective pin component to move.

2. The apparatus according to claim 1, characterized in that, The correction plate assembly includes a correction plate with a concave arc surface and positioning pins. Several through holes are provided on the correction plate, and the size and distribution of the holes are consistent with the size and distribution of the holes on the panel to be corrected. Several positioning pins are provided around the periphery of the correction plate.

3. The apparatus according to claim 2, characterized in that, The corrective pin assembly includes corrective pins and a sliding plate. The sliding plate is provided with a plurality of through holes corresponding to the number of corrective pins, and the arrangement pattern of the through holes is the same as that of the through holes on the corrective plate.

4. The apparatus according to claim 3, characterized in that, The corrective pin assembly also includes a spring. The corrective pin is an irregular cylindrical pin, including a guide section, a pull-out section, and an anti-pull-out section. The guide section is conical. The pull-out section is an irregular shape obtained by cutting part of the cylindrical pin according to a certain size hole diameter. The anti-pull-out section is a milled stepped shaft, and the milling direction of the anti-pull-out section is perpendicular to the cutting direction of the pull-out section. The spring is disposed on the pull-out section between the anti-pull-out section and the slide plate.

5. The apparatus according to claim 4, characterized in that, The auxiliary drive assembly includes a positioning plate, a cover plate, and an auxiliary drive cylinder; the cover plate is disposed on the upper part of the positioning plate, and the cover plate and the positioning plate form a space; the auxiliary drive cylinder is installed on the side of the positioning plate, and its piston is connected to the slide plate.

6. The apparatus according to claim 5, characterized in that, The support assembly includes a support plate and support columns. The main drive assembly is disposed on the upper part of the support plate, and a plurality of the support columns are connected to the support plate and the correction plate simultaneously.

7. The apparatus according to claim 6, characterized in that, The main drive assembly is the main drive cylinder, which is mounted on the support plate, and its piston is connected to the top of the cover plate.

8. The apparatus according to claim 4, characterized in that, There are several positioning pins, and the through holes on the slide plate form a clearance fit with the drawing section.

9. The apparatus according to claim 5, characterized in that, The positioning plate is provided with a rectangular through hole, the sliding plate is disposed in the rectangular through hole, and the cover plate is provided with an elongated groove. The size of the groove is greater than or equal to the milled flat size of the pull-out section, and the pull-out section is embedded in the corresponding elongated groove.

10. The apparatus according to claim 4, characterized in that, The specified dimension is 5mm.

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