Maintenance frame of spherical screen

Abstract

The utility model provides a spherical screen maintenance rack, the spherical screen is provided with a screen body, the maintenance rack comprises a first rack body, the first rack body comprises a first top frame, a first bottom frame, a first inclined ladder, a first support rod group and a second support rod group, the first top frame is provided with a first side edge located at the outer side of the first bottom frame, and the second top frame is provided with a second side edge located at the outer side of the second bottom frame; the first inclined ladder is connected between the first top frame and the first bottom frame and extends towards the first side edge from bottom to top, the first supporting rod set and the second supporting rod set are connected to the outer sides of the first top frame, the first bottom frame and the first inclined ladder and are oppositely arranged, and the first side edge is located between the first supporting rod set and the second supporting rod set. The first inclined ladder, the first supporting rod set and the second supporting rod set define a first ladder stand space. According to the technical scheme, the problem that an existing maintenance tool is difficult to maintain the spherical screen in the prior art can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of tooling, and in particular to a maintenance frame for a spherical screen. Background Art

[0002] For some large display screen structures, especially those with large vertical dimensions, maintenance tools are generally required to enable maintenance personnel to maintain the screen or modules located at high places.

[0003] This type of maintenance tooling generally includes electric lifts, telescopic bamboo ladders, simple scaffolding, etc. Different maintenance tooling can be selected for different display screen structures and environments. However, the various maintenance tooling mentioned above is difficult to use for spherical screens.

[0004] Specifically, electric elevators are large, heavy, have low chassis, and poor accessibility, requiring limited space and movement routes. These limitations are particularly evident in tight spaces like those inside a dome. The space at the entrance to the dome screen is narrow, and the center of the screen is occupied by other equipment, requiring only easily portable work equipment to enter. Electric elevators are not suitable for such space-constrained environments.

[0005] Telescopic bamboo ladders are easy to carry, but they also have many limitations:

[0006] 1. It is difficult to maintain the dome area. Since there are other devices in the middle of the dome screen, there is no place to place a telescopic bamboo ladder when maintaining the dome.

[0007] 2. The bamboo ladder becomes thinner from bottom to top. The higher it rises, the more unstable it becomes. Therefore, when maintaining an area more than 3 meters above the ground, the ladder will shake a lot.

[0008] 3. When the ladder is tilted, it cannot be placed directly on the dome screen's light panel, as this will damage the panel. A soft material such as sponge should be used as a protective pad. Because the dome screen is curved, the protective pad cannot be fixed and needs to be adjustable. However, when the ladder is tilted, the angle between the protective pad and the dome screen is difficult to adjust. When the ladder is used at a high height, it is top-heavy and difficult to control, which can easily cause the light panel to be damaged.

[0009] A simple scaffolding can be used to enter the interior of the spherical screen, but the use process is cumbersome and the construction process is time-consuming: the scaffolding needs to be built level by level. For a spherical screen with a diameter of 5m, it needs to be built to a height of 3.5 meters when maintaining the dome. If only one or two light panels on the dome need to be replaced, it will take half a day to build the scaffolding, and the disassembly and assembly are cumbersome; the scaffolding is built vertically, and the spherical screen protrudes outward near the equator, which is far away from the scaffolding, requiring the construction of an external exploration platform, and the disassembly and assembly process is also cumbersome. Utility Model Content

[0010] The main purpose of the utility model is to provide a maintenance frame for a spherical screen, so as to solve the problem in the related art that the existing maintenance tooling is difficult to perform maintenance on the spherical screen.

[0011] In order to achieve the above-mentioned object, the utility model provides a maintenance frame for a spherical screen, the spherical screen has a screen body, wherein the maintenance frame includes: a first frame body, including a first top frame, a first bottom frame, a first inclined ladder, a first support rod group and a second support rod group, the first top frame has a first side edge located on the outside of the first bottom frame, the first inclined ladder is connected between the first top frame and the first bottom frame, in a bottom-to-top direction, the first inclined ladder extends toward the first side edge, the first support rod group and the second support rod group are connected to the outside of the first top frame, the first bottom frame and the first inclined ladder and are arranged opposite to each other, the first side edge is located between the first support rod group and the second support rod group, the first inclined ladder, the first support rod group and the second support rod group enclose a first climbing ladder space, wherein the first frame body has a first working position located on the inner side of the spherical screen and with the first side edge close to the screen body, and a second working position located on the outer side of the spherical screen and with the first side edge close to the screen body.

[0012] Furthermore, the maintenance frame also includes: a second frame body, which is detachably arranged above the first frame body, the second frame body including a second top frame, a second bottom frame, a second inclined ladder, a third support rod group and a fourth support rod group, the second top frame having a second side edge located on the outer side of the second bottom frame and a third side edge flush with or located on the inner side of the second bottom frame, the second side edge and the third side edge being arranged opposite to each other, and in a bottom-to-top direction, the second inclined ladder extends toward the second side edge, the third support rod group and the fourth support rod group are connected to the second top frame, the second bottom frame and the outer side of the second inclined ladder and are arranged opposite to each other, the second side edge and the third side edge are located between the third support rod group and the fourth support rod group, the second inclined ladder, the third support rod group and the fourth support rod group are arranged to form a second ladder climbing space, wherein the second frame body has a third working position where the second side edge is close to the first side edge and a fourth working position where the second side edge is away from the first side edge.

[0013] Furthermore, the first support rod group has a first plug-in end protruding upward from the first top frame; the second support rod group has a second plug-in end protruding upward from the first top frame; the third support rod group has a third plug-in end protruding downward from the second bottom frame; the fourth support rod group has a fourth plug-in end protruding downward from the second bottom frame shown; wherein, when the second frame is located in the third working position, the first plug-in end is plug-fitted with the third plug-in end, and the second plug-in end is plug-fitted with the fourth plug-in end; when the second frame is located in the fourth working position, the first plug-in end is plug-fitted with the fourth plug-in end, and the second plug-in end is plug-fitted with the third plug-in end.

[0014] Furthermore, the maintenance frame also includes: a third frame body, which is detachably arranged above the second frame body, the third frame body including a third top frame, a third bottom frame, a third inclined ladder, a fifth support rod group and a sixth support rod group, the third top frame having a fourth side edge located on the outside of the third bottom frame and a fifth side edge located on the inside of the third bottom frame, the fourth side edge and the fifth side edge being arranged opposite to each other, and in a bottom-to-top direction, the third inclined ladder extends toward the fourth side edge, the fifth support rod group and the sixth support rod group are connected to the third top frame, the third bottom frame and the outside of the third inclined ladder and are arranged opposite to each other, the fourth side edge and the fifth side edge are located between the fifth support rod group and the sixth support rod group, the third inclined ladder, the fifth support rod group and the sixth support rod group are arranged to form a third ladder climbing space, wherein the third frame body has a fifth working position where the fourth side edge is close to the second side edge and a sixth working position where the fourth side edge is away from the second side edge.

[0015] Furthermore, the maintenance frame also includes: a fourth frame, which is detachably arranged above the second frame or the third frame, the fourth frame includes a fourth top frame, a fourth bottom frame, a seventh support rod group and an eighth support rod group, the seventh support rod group and the eighth support rod group are connected to the outside of the fourth top frame and the fourth bottom frame and are arranged opposite to each other, the fourth top frame has a sixth side located on the inner side of the fourth bottom frame and a seventh side flush with or located on the outside of the fourth bottom frame, the sixth side and the seventh side are located between the seventh support rod group and the eighth support rod group, and an operating space is formed between the seventh support rod group and the eighth support rod group, wherein, when the fourth frame is installed on the second frame, the seventh side is arranged close to the second side; when the fourth frame is installed on the third frame, the seventh side is arranged close to the fourth side.

[0016] Furthermore, when the first frame, the second frame, and the fourth frame are assembled together, the first frame, the second frame, and the fourth frame have a first assembly state located inside the spherical screen, in which the first side is arranged close to the screen, and the second side and the seventh side are arranged away from the screen; and / or, the first frame, the second frame, and the fourth frame have a second assembly state located outside the spherical screen, in which the first side, the second side, and the seventh side are all arranged close to the screen.

[0017] Furthermore, the maintenance frame also includes a first connecting cross frame. When the first frame body, the second frame body, the fourth frame body and the first connecting cross frame are assembled together, the first frame body, the second frame body, the fourth frame body and the first connecting cross frame have a third assembly state located on the inner side of the spherical screen. In the third assembly state: a first frame body, a second frame body and a fourth frame body form a first installation group. In the first installation group, the first side edge is arranged close to the screen body, and the second side edge and the seventh side edge are arranged away from the screen body. The two first installation groups are respectively arranged close to the screen body in the radial direction of the spherical screen, and the first connecting cross frame is connected between the two second side edges in the two first installation groups.

[0018] Furthermore, when the first frame, the second frame, and the third frame are assembled together, the first frame, the second frame, and the third frame have a fourth assembly state located inside the spherical screen. In the fourth assembly state, the first side and the second side are arranged close to the screen body, and the fourth side is arranged away from the screen body; and / or, the first frame, the second frame, and the third frame have a fifth assembly state located outside the spherical screen. In the fifth assembly state, the first side is arranged away from the screen body, and the second side and the fourth side are both arranged close to the screen body.

[0019] Further, when the first frame, the second frame, the third frame and the fourth frame are assembled together, the first frame, the second frame, the third frame and the fourth frame have a sixth assembly state located inside the spherical screen. In the sixth assembly state, the first side and the second side are arranged close to the screen body, and the fourth side and the seventh side are arranged away from the screen body; and / or, the first frame, the second frame, the third frame and the fourth frame have a seventh assembly state located outside the spherical screen. In the seventh assembly state, the first side is arranged away from the screen body, and the second side, the fourth side and the seventh side are all arranged close to the screen body.

[0020] Furthermore, the maintenance frame also includes a second connecting cross frame. When the first frame, the second frame, the third frame, the fourth frame and the second connecting cross frame are assembled together, the first frame, the second frame, the third frame, the fourth frame and the second connecting cross frame have an eighth assembly state located on the inner side of the spherical screen. In the eighth assembly state: a first frame, a second frame, a third frame and a fourth frame form a second installation group. In the second installation group, the first side is arranged close to the screen body, and the second side, the fourth side and the seventh side are all arranged away from the screen body. The two second installation groups are respectively arranged close to the screen body in the radial direction of the spherical screen, and the second connecting cross frame is connected between the two fourth sides in the two second installation groups.

[0021] Furthermore, the second frame includes two second inclined ladders arranged at intervals.

[0022] Furthermore, the first bottom frame includes a first mounting tube, a second mounting tube, a first connecting rod and a second connecting rod, the first support rod group is connected above the first mounting tube, the second support rod group is connected above the second mounting tube, the first connecting rod and the second connecting rod are connected between the first mounting tube and the second mounting tube, and the maintenance frame also includes a first support base and a second support base, the first support base is located on the outside of the first connecting rod and can be telescopically inserted into the first mounting tube and the second mounting tube, and the second support base is located on the outside of the second connecting rod and can be telescopically inserted into the first mounting tube and the second mounting tube.

[0023] Using the technical solution of the present invention, a first top frame, a first bottom frame, and a first and second support rod groups form the main frame of the first frame. A first inclined ladder is located within the main frame and connected between the first top frame and the first bottom frame. Workers can climb the first inclined ladder to reach a suitable maintenance height for screen maintenance. The first side of the first top frame is located outside the first bottom frame. When viewed from the side, the first top frame, the first and second support rod groups form a tapered structure that protrudes toward the first side. This allows the first frame to accommodate the non-vertical extension of the screen. Specifically, when maintaining the inside of the spherical screen, the first frame is placed inside the spherical screen with the first side close to the screen. When maintaining the outside of the spherical screen, the first frame is placed outside the spherical screen with the first side close to the screen. Because the first inclined ladder extends from bottom to top toward the first side, workers can reach a position close to the screen when climbing the first inclined ladder, facilitating maintenance operations. Therefore, the technical solution of the present application can effectively solve the problem in the related art that the existing maintenance tooling is difficult to perform maintenance on the spherical screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 A schematic diagram of the three-dimensional structure of a maintenance stand according to a first embodiment of the present utility model is shown;

[0026] Figure 2 Shown Figure 1 An enlarged view of the first frame of the maintenance frame;

[0027] Figure 3 Shown Figure 1 An enlarged view of the second frame of the maintenance rack;

[0028] Figure 4 Shown Figure 1 An enlarged view of the fourth frame of the maintenance rack;

[0029] Figure 5 Shown Figure 1 A simplified structural diagram of the maintenance rack in the first use state;

[0030] Figure 6 Shown Figure 1 A simplified structural diagram of the second use state of the maintenance rack;

[0031] Figure 7 Shown Figure 1A simplified structural diagram of the maintenance rack in the third usage state;

[0032] Figure 8 Shown Figure 1 A simplified structural diagram of the maintenance rack in the fourth usage state;

[0033] Figure 9 Shown Figure 1 A simplified structural diagram of the fifth use state of the maintenance rack;

[0034] Figure 10 Shown Figure 1 A simplified structural diagram of the maintenance rack in the sixth usage state;

[0035] Figure 11 Shown Figure 1 A schematic diagram of the three-dimensional structure of the maintenance rack in the sixth usage state;

[0036] Figure 12 Shown Figure 1 A schematic diagram of the three-dimensional structure of the maintenance rack in the seventh usage state;

[0037] Figure 13 Shown Figure 12 Schematic diagram of the three-dimensional structure of the maintenance rack placed inside the spherical screen;

[0038] Figure 14 A schematic diagram of the three-dimensional structure of a second embodiment of a maintenance stand according to the present utility model is shown;

[0039] Figure 15 Shown Figure 14 An enlarged view of the first frame of the maintenance frame;

[0040] Figure 16 Shown Figure 14 An enlarged view of the second frame of the maintenance rack;

[0041] Figure 17 Shown Figure 14 An enlarged view of the third frame of the maintenance rack;

[0042] Figure 18 Shown Figure 14 An enlarged view of the fourth frame of the maintenance rack;

[0043] Figure 19 Shown Figure 14 A simplified structural diagram of the maintenance rack in the first use state;

[0044] Figure 20 Shown Figure 14 A simplified structural diagram of the second use state of the maintenance rack;

[0045] Figure 21 Shown Figure 14 A simplified structural diagram of the maintenance rack in the third usage state;

[0046] Figure 22 Shown Figure 14 A simplified structural diagram of the maintenance rack in the fourth usage state;

[0047] Figure 23 Shown Figure 14 A simplified structural diagram of the fifth use state of the maintenance rack;

[0048] Figure 24 Shown Figure 14 A simplified structural diagram of the maintenance rack in the sixth usage state;

[0049] Figure 25 Shown Figure 14 A simplified structural diagram of the seventh use state of the maintenance rack;

[0050] Figure 26 Shown Figure 14 A simplified structural diagram of the eighth use state of the maintenance rack;

[0051] Figure 27 Shown Figure 14 A simplified structural diagram of the ninth use state of the maintenance rack;

[0052] Figure 28 Shown Figure 27 Schematic diagram of the three-dimensional structure of the maintenance rack placed inside the spherical screen.

[0053] The above drawings include the following reference numerals:

[0054] 1. Screen body;

[0055] 10. First frame; 11. First top frame; 111. First side; 12. First bottom frame; 121. First mounting tube; 122. Second mounting tube; 123. First connecting rod; 124. Second connecting rod; 13. First inclined ladder; 14. First support rod group; 15. Second support rod group;

[0056] 20. Second frame; 21. Second top frame; 211. Second side; 212. Third side; 22. Second bottom frame; 23. Second inclined ladder; 24. Third support rod group; 25. Fourth support rod group; 26. Support crossbar;

[0057] 30. Third frame; 31. Third top frame; 311. Fourth side; 312. Fifth side; 32. Third bottom frame; 33. Third inclined ladder; 34. Fifth support rod group; 35. Sixth support rod group;

[0058] 40. Fourth frame; 41. Fourth top frame; 411. Sixth side; 412. Seventh side; 42. Fourth bottom frame; 43. Seventh support rod group; 44. Eighth support rod group; 45. First gear lever; 46. Second gear lever;

[0059] 50. First connecting cross frame; 100. First installation group;

[0060] 60. Second connecting cross frame; 200. Second installation group;

[0061] 71, first supporting frame; 711, first supporting rod; 712, second supporting rod; 713, third supporting rod; 72, second supporting frame;

[0062] a. First direction; b. Second direction. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0066] This application provides a spherical screen maintenance frame, Figures 1 to 13 The schematic diagram of the structure of the first embodiment of the maintenance rack according to the present application is shown. The maintenance rack of this embodiment can perform comprehensive maintenance on a spherical screen with a diameter of 5m.

[0067] Specifically, if Figure 1 、 Figure 2 、 Figure 5 、 Figure 8 and Figure 11 As shown, the spherical screen has a screen body 1, and the first embodiment of the maintenance frame includes a first frame body 10, wherein the first frame body 10 includes a first top frame 11, a first bottom frame 12, a first inclined ladder 13, a first support rod group 14 and a second support rod group 15, the first top frame 11 has a first side 111 located outside the first bottom frame 12, the first inclined ladder 13 is connected between the first top frame 11 and the first bottom frame 12, and in the direction from bottom to top, the first inclined ladder 13 extends toward the first side 111, the first support rod group 14 and the second support rod group 15. The rod group 15 is connected to the outside of the first top frame 11, the first bottom frame 12 and the first inclined ladder 13 and is arranged opposite to each other. The first side 111 is located between the first support rod group 14 and the second support rod group 15. The first inclined ladder 13, the first support rod group 14 and the second support rod group 15 are surrounded to form a first climbing ladder space, wherein the first frame 10 has a first working position located on the inner side of the spherical screen and the first side 111 is close to the screen body 1, and a second working position located on the outer side of the spherical screen and the first side 111 is close to the screen body 1.

[0068] Applying the technical solution of this embodiment, the first top frame 11, the first bottom frame 12, the first support rod group 14 and the second support rod group 15 form the main frame of the first frame 10. The first inclined ladder 13 is located inside the main frame and connected between the first top frame 11 and the first bottom frame 12. Workers can reach a suitable maintenance height by climbing the first inclined ladder 13 to perform maintenance on the screen 1. The first side edge 111 of the first top frame 11 is located on the outside of the first bottom frame 12, so that when viewed from the side, the first top frame 11 and the first support rod group 14 and the second support rod group 15 form a tapered structure protruding toward the first side edge 111. This allows the first frame 10 to adapt to the non-vertical extension trend of the screen 1. Specifically, when the inside of the spherical screen needs to be maintained, the first frame 10 is placed inside the spherical screen with the first side 111 positioned close to the screen body 1. When the outside of the spherical screen needs to be maintained, the first frame 10 is placed outside the spherical screen with the first side 111 positioned close to the screen body 1. Since the first inclined ladder 13 extends upward toward the first side 111, workers can reach a position close to the screen body 1 by climbing the first inclined ladder 13, facilitating maintenance operations. Therefore, the technical solution of this embodiment can effectively solve the problem of the existing maintenance tooling in the related art that makes spherical screen maintenance difficult.

[0069] Specifically, in this embodiment, the first top frame 11 and the first bottom frame 12 are both rectangular structures. The extending direction of the first side 111 is a first direction a, the extending direction of the two sides connected to the first side 111 is a second direction b, and the first inclined ladder 13 extends along the second direction.

[0070] Specifically, the first frame 10 of this embodiment can be used to maintain the lower part of the spherical screen. When the maintenance height is below a certain height range (for example, the maintenance height is below 1.5m or below 1.8m), the staff can stand directly on the ground to perform maintenance work; when the maintenance height is higher than a certain value, the first frame 10 of this embodiment can be used for maintenance.

[0071] To ensure ease of transport, the first frame 10 is small in size and light in weight, and its height is set between 1.5m and 2m. By using the first frame 10 of this embodiment, maintenance can be performed on the portion below the equatorial plane of a 5m spherical screen.

[0072] In order to further maintain the higher structures, such as Figure 1 and Figure 3As shown, the maintenance frame also includes: a second frame body 20, which is detachably arranged above the first frame body 10, and the second frame body 20 includes a second top frame 21, a second bottom frame 22, a second inclined ladder 23, a third support rod group 24 and a fourth support rod group 25. The second top frame 21 has a second side 211 located on the outside of the second bottom frame 22 and a third side 212 flush with or located on the inside of the second bottom frame 22. The second side 211 and the third side 212 are arranged opposite to each other. In the direction from bottom to top, the second inclined ladder 23 extends toward the second side 211, and the third side 212 is arranged opposite to each other. The third support rod group 24 and the fourth support rod group 25 are connected to the outside of the second top frame 21, the second bottom frame 22 and the second inclined ladder 23 and are arranged opposite to each other. The second side 211 and the third side 212 are located between the third support rod group 24 and the fourth support rod group 25. The second inclined ladder 23, the third support rod group 24 and the fourth support rod group 25 are arranged to form a second ladder space, wherein the second frame 20 has a third working position where the second side 211 is close to the first side 111 and a fourth working position where the second side 211 is away from the first side 111.

[0073] Specifically, when maintenance is required on the portion above the equatorial plane of the spherical screen, the second frame 20 can be assembled above the first frame 10, and the staff can climb the second inclined ladder 23 to a higher height to perform maintenance operations. Figure 6 As shown, when the interior of the spherical screen needs to be maintained, the first frame 10 is kept in the first working position and the second frame 20 is kept in the fourth working position, that is, the first side 111 of the first frame 10 is set close to the screen body 1, and the third side 212 of the second frame 20 is set close to the screen body 1. Since the third side 212 is located on the inner side of the second bottom frame 22, when viewed from the side, the second top frame 21 and the third support rod group 24 and the fourth support rod group 25 form a structure extending away from the screen body 1 in the bottom-up direction, which can adapt to the extension trend of the screen body 1. Figure 9 As shown, when maintenance of the exterior of the spherical screen is required, the first frame 10 is maintained in the second working position and the second frame 20 is maintained in the third working position, that is, the first side 111 of the first frame 10 is arranged close to the screen body 1, and the second side 211 of the second frame 20 is arranged close to the screen body 1. Since the second side 211 is located on the outside of the second bottom frame 22, when viewed from the side, the second top frame 21 and the third support rod group 24 and the fourth support rod group 25 form a cone-shaped structure protruding toward the screen body 1, which can adapt to the extension trend of the screen body 1.

[0074] It should be noted that, in this embodiment, the second top frame 21 and the second bottom frame 22 are both rectangular structures, and the second side 211 and the third side 212 extend along the first direction a, that is, the second side 211 and the third side 212 are parallel to the first side 111. The above-mentioned "far away" and "close" are both relative. Specifically, when in the third working position, the distance between the second side 211 and the first side 111 in the second direction b is shorter than that between the third side 212 and the first side 111; when in the fourth working position, the distance between the second side 211 and the first side 111 in the second direction b is longer than that between the third side 212 and the first side 111.

[0075] To ensure ease of transport and assembly, the second frame 20 is compact and lightweight, and its height is set between 1.2m and 1.5m. By using the first frame 10 and the second frame 20 of this embodiment, maintenance can be performed on the screen 1 above the equatorial plane and below 4m inside a 5m spherical screen, and on the exterior of a 5m spherical screen above the equatorial plane and below 3.5m.

[0076] like Figure 5 、 Figure 6 、 Figure 8 and Figure 9 As shown, the first frame 10 and the second frame 20 are detachable structures, the first support rod group 14 has a first plug-in end protruding upward from the first top frame 11; the second support rod group 15 has a second plug-in end protruding upward from the first top frame 11; the third support rod group 24 has a third plug-in end protruding downward from the second bottom frame 22; the fourth support rod group 25 has a fourth plug-in end protruding downward from the second bottom frame 22 shown; wherein, when the second frame 20 is located in the third working position, the first plug-in end is plug-fitted with the third plug-in end, and the second plug-in end is plug-fitted with the fourth plug-in end; when the second frame 20 is located in the fourth working position, the first plug-in end is plug-fitted with the fourth plug-in end, and the second plug-in end is plug-fitted with the third plug-in end.

[0077] Specifically, in this embodiment, the first plug-in end and the second plug-in end are bundle tube structures with relatively small diameters, and the third plug-in end and the fourth plug-in end are sleeve structures with relatively large diameters. The bundle tube structure is inserted into the sleeve structure and then locked with screws.

[0078] Specifically, the plug-in connection parts of the two can be fastened by screw locking to ensure the stability of the connection.

[0079] In order to further maintain the upper part of the spherical screen, such as Figure 1 and Figure 4As shown, the maintenance frame also includes a fourth frame body 40, which is detachably arranged above the second frame body 20. The fourth frame body 40 includes a fourth top frame 41, a fourth bottom frame 42, a seventh support rod group 43 and an eighth support rod group 44. The seventh support rod group 43 and the eighth support rod group 44 are connected to the outside of the fourth top frame 41 and the fourth bottom frame 42 and are arranged opposite to each other. The fourth top frame 41 has a sixth side 411 located on the inner side of the fourth bottom frame 42 and a seventh side 412 flush with or located on the outside of the fourth bottom frame 42. The sixth side 411 and the seventh side 412 are located between the seventh support rod group 43 and the eighth support rod group 44. An operating space is formed between the seventh support rod group 43 and the eighth support rod group 44. When the fourth frame body 40 is installed on the second frame body 20, the seventh side 412 is arranged close to the second side 211.

[0080] The fourth top frame 41 and the fourth bottom frame 42 are both rectangular structures, and the sixth side 411 and the seventh side 412 extend along the first direction a, that is, the sixth side 411 and the seventh side 412 are parallel to the first side 111 .

[0081] Specifically, if Figure 10 As shown, when it is necessary to maintain the portion of the 5m spherical screen that is more than 3.5m outside, the fourth frame 40 can be assembled above the second frame 20, and the first side 111 of the first frame 10, the second side 211 of the second frame 20 and the seventh side 412 of the fourth frame are all arranged close to the screen body 1 (that is, the first frame 10, the second frame 20 and the fourth frame 40 are in the second assembly state). Since the seventh side 412 is located on the outside of the fourth bottom frame 42, when viewed from the side, the fourth top frame 41 and the seventh support rod group 43 and the eighth support rod group 44 form a cone-shaped structure protruding toward the screen body 1, which can adapt to the extension trend of the screen body 1. Figure 11 As shown, in order to ensure the safety of workers at heights, a detachable first blocking rod 45 can be provided on the side of the seventh support rod group 43 and the eighth support rod group 44 away from the spherical screen.

[0082] like Figure 7As shown, when maintenance is required on the portion above 4m inside the 5m spherical screen, the fourth frame 40 can be assembled above the second frame 20, with the first side 111 of the first frame 10 positioned close to the screen 1, and the second side 211 of the second frame 20 and the seventh side 412 of the fourth frame 40 positioned away from the screen 1 (i.e., the first, second, and fourth frames 10, 20, and 40 are in the first assembled state). In this embodiment, the sixth side 411 is located inside the fourth bottom frame 42, and in the first assembled state, the sixth side 411 is positioned close to the screen 1. When viewed from the side, the fourth top frame 41, the seventh support rod group 43, and the eighth support rod group 44 form a structure extending from bottom to top away from the screen 1, thus aligning with the extension trend of the screen 1. To ensure the safety of workers at height, a removable first barrier rod 45 can be provided on the side of the seventh and eighth support rod groups 43 and 44 away from the spherical screen.

[0083] It should be noted that the connection method between the fourth frame 40 and the second frame 20 is the same as the connection method between the second frame 20 and the first frame 10 , and will not be repeated here.

[0084] like Figure 12 and Figure 13 As shown, in order to further ensure the stability when maintaining the part above 4 m inside the 5 m spherical screen (that is, maintaining the dome), the maintenance frame also includes a first connecting cross frame 50. When the first frame 10, the second frame 20, the fourth frame 40 and the first connecting cross frame 50 are assembled together, the first frame 10, the second frame 20, the fourth frame 40 and the first connecting cross frame 50 have a third assembly state located inside the spherical screen. In the third assembly state: a first frame 10, a second frame 20 and a fourth frame 40 form a first installation group 100. In the first installation group 100, the first side 111 is arranged close to the screen body 1, and the second side 211 and the seventh side 412 are arranged away from the screen body 1. The two first installation groups 100 are respectively arranged close to the screen body 1 in the radial direction of the spherical screen, and the first connecting cross frame 50 is connected between the two second side edges 211 in the two first installation groups 100. The two first installation groups 100 and the first connecting cross frame 50 form a stable support structure. A support plate can be set above the first connecting cross frame 50 so that the staff can stand directly under the dome for maintenance. Figure 12 As shown, in order to further ensure the safety of workers at heights, a second barrier rod 46 may be provided between the two seventh side edges 412 of the two first installation groups 100 .

[0085] Preferably, the first connecting cross frame 50 includes two tie rods.

[0086] In order to ensure the convenience of transportation and assembly, the fourth frame 40 is made smaller in size and lighter in weight, and the height of the fourth frame 40 is set between 1m and 1.2m.

[0087] like Figures 11 to 13 As shown, the first support rod group 14, the second support rod group 15, the third support rod group 24, the fourth support rod group 25, the seventh support rod group 43 and the eighth support rod group 44 all include multiple support vertical rods, and may also include horizontal rods and diagonal rods connecting adjacent support vertical rods to ensure the structural strength of the first frame 10, the second frame 20 and the fourth frame 40.

[0088] like Figure 2 As shown, since the space inside the spherical screen for placing the maintenance rack is relatively small, the first base frame 12 of the first frame body 10 needs to be smaller. To ensure the stability of the maintenance rack in various assembled states, the first base frame 12 includes a first mounting tube 121, a second mounting tube 122, a first connecting rod 123, and a second connecting rod 124. The first support rod group 14 is connected above the first mounting tube 121, the second support rod group 15 is connected above the second mounting tube 122, and the first connecting rod 123 and the second connecting rod 124 are connected between the first mounting tube 121 and the second mounting tube 122. The maintenance rack also includes a first support base 71 and a second support base 72. The first support base 71 is located outside the first connecting rod 123 and is telescopically inserted into the first and second mounting tubes 121 and 122. The second support base 72 is located outside the second connecting rod 124 and is telescopically inserted into the first and second mounting tubes 121 and 122. Specifically, the first support base 71 includes a first support rod 711 extending along a first direction a, and a second support rod 712 and a third support rod 713 connected to both ends of the first support rod 711 and extending along a second direction b. The second support rod 712 is telescopically inserted into the first mounting tube 121, and the third support rod 713 is telescopically inserted into the second mounting tube 122. After confirming the extension length of the second support rod 712 and the third support rod 713, screws can be used to fix the second support rod 712 to the first mounting tube 121, and the third support rod 713 to the second mounting tube 122. The structure of the second support base 72 is the same as that of the first support base 71 and will not be repeated here.

[0089] It should be noted that to ensure sufficient space for the staff to move, the first top frame 11, the first bottom frame 12, the second top frame 21, the second bottom frame 22, the fourth top frame 41, and the fourth bottom frame 42 can be of an incompletely enclosed structure, that is, they can be in the shape of "匚" (including one side frame extending along the first direction a and two side frames extending along the second direction b) or only have two side frames extending along the second direction b. The first side 111 in this embodiment refers to the connection line between the two corresponding ends of the first support rod group 14 and the second support rod group 15; the second side 211 and the third side 212 refer to the connection lines between the two corresponding sets of ends of the third support rod group 24 and the fourth support rod group 25; the sixth side 411 and the seventh side 412 refer to the connection lines between the two sets of ends of the seventh support rod group 43 and the eighth support rod group 44.

[0090] The following describes a preferred implementation manner in the first embodiment of this:

[0091] The first frame body 10 is welded from 6061-T6 aluminum alloy with a wall thickness of 3 mm. The welding process uses alternating current tungsten inert gas welding. It weighs 17 kg and has dimensions of 1930 (height) * 810 (dimension in the first direction a) * 1120 (dimension in the second direction b), having the advantages of light weight and high strength.

[0092] The second frame body 20 is welded from 6061-T6 aluminum alloy with a wall thickness of 3 mm. The welding process uses alternating current tungsten inert gas welding. It weighs 15 kg and has dimensions of 1350 (height) * 790 (dimension in the first direction a) * 1290 (dimension in the second direction b), having the advantages of light weight and high strength.

[0093] The fourth frame body 40 and the first stop rod 45 are welded from 6061-T6 aluminum alloy with a wall thickness of 3 mm. The welding process uses alternating current tungsten inert gas welding. It weighs 3.5 kg and can be picked up with one hand.

[0094] The first support bottom frame 71 and the second support bottom frame 72 are made of galvanized steel with a wall thickness of 5 mm, which has the advantage of high strength. Among them, the length of the first support rod 711 is 1500 mm, and the lengths of the second support rod 712 and the third support rod 713 are 1800 mm.

[0095] When building, first, it is necessary to determine the position where the maintenance frame is placed and the height to be built. When maintaining the side wall of the spherical screen, only one side of the frame body needs to be built; when it is necessary to maintain the dome of the spherical screen, then both sides of the frame body need to be built and the first connecting cross-frame 50 is used to connect the two sides of the frame body. The maintenance frame can be built up to a height of 3 m at most.

[0096] When maintaining the portion of the spherical screen below 2.5m, you first need to remove the inner and outer skirt panels at the bottom of the spherical screen so that the first support base 71 can extend under the spherical screen. Since the inner and outer skirt panels are magnetic, they are easy to remove. Then, place the first frame 10 inside the spherical screen, install the second support rod 712 into the first mounting tube 121, and install the third support rod 713 into the second mounting tube 122. Then, install the first support rod 711 on the outer ends of the second support rod 712 and the third support rod 713, and finally tighten them with screws. The connection method between the second support base 72 and the first frame 10 is the same as the connection method between the first support base 71 and the first frame 10, so it will not be repeated here. After the first frame 10, the first support base 71, and the second support base 72 are connected, you can begin maintenance on the portion below 2.5m.

[0097] When maintaining the portion of the spherical screen that is above 2.5 m and below 4 m, it is necessary to further install the second frame 20 on the first frame 10 .

[0098] When maintaining the portion of the spherical screen that is more than 4 m deep (non-spherical top portion), a fourth frame 40 needs to be further installed on the second frame 20 .

[0099] When maintenance is needed on the dome area inside the spherical screen, it is dangerous because the dome is high off the ground. Therefore, it is necessary to build two frames on both sides, connect and lock them with a first connecting crossbeam 50 in the middle, and then lay a support plate. This not only increases safety but also avoids other devices in the middle of the spherical screen. The first connecting crossbeam 50 includes two tie rods, each end of which is fixed to the second side 211 by a clip.

[0100] When maintaining the outer portion of the spherical screen below 2.5 m, it is only necessary to connect the first frame 10, the first supporting base 71 and the second supporting base 72, lift the outer skin of the spherical screen and support it with a support rod, and then maintain the screen body 1 inside the skin.

[0101] When maintaining the outer part of the spherical screen within 2.5m and 3.5m, it is necessary to further install the second frame 20 on the first frame 10, lift the outer skin of the spherical screen and support it with a support rod, and then maintain the screen body 1 inside the skin.

[0102] When maintaining the outer part of the spherical screen above 3.5m, it is necessary to further install a fourth frame 40 on the second frame 20. The skin of the area above 3.5m is magnetically attracted. The skin can be directly removed, and then the screen body 1 located inside the skin can be maintained, or the steel structure of the spherical screen can be climbed to maintain the dome.

[0103] In this embodiment, the maintenance rack is lightweight and easy to carry, making it suitable for space-constrained environments and enabling comprehensive maintenance of the spherical screen's interior and exterior. The maintenance rack is simple to construct and easy to operate, requiring only two or three people to complete the installation within an hour. It also offers high stability, enabling maintenance of spherical screens extending over 4 meters.

[0104] Book Figures 14 to 28 The diagram shows the structure of the second embodiment of the maintenance rack according to the present application. The maintenance rack of this embodiment can perform comprehensive maintenance on a spherical screen with a spherical diameter of 7m.

[0105] Specifically, if Figure 14 、 Figure 15 、 Figure 19 and Figure 23 As shown, the spherical screen has a screen body 1, and the second embodiment of the maintenance frame includes a first frame body 10, wherein the first frame body 10 includes a first top frame 11, a first bottom frame 12, a first inclined ladder 13, a first support rod group 14 and a second support rod group 15, the first top frame 11 has a first side 111 located outside the first bottom frame 12, the first inclined ladder 13 is connected between the first top frame 11 and the first bottom frame 12, and in the direction from bottom to top, the first inclined ladder 13 extends toward the first side 111, the first support rod group 14 and the second support rod group 15. The rod group 15 is connected to the outside of the first top frame 11, the first bottom frame 12 and the first inclined ladder 13 and is arranged opposite to each other. The first side 111 is located between the first support rod group 14 and the second support rod group 15. The first inclined ladder 13, the first support rod group 14 and the second support rod group 15 are surrounded to form a first climbing ladder space, wherein the first frame 10 has a first working position located on the inner side of the spherical screen and the first side 111 is close to the screen body 1, and a second working position located on the outer side of the spherical screen and the first side 111 is close to the screen body 1.

[0106] Applying the technical solution of this embodiment, the first top frame 11, the first bottom frame 12, the first support rod group 14 and the second support rod group 15 form the main frame of the first frame 10. The first inclined ladder 13 is located inside the main frame and connected between the first top frame 11 and the first bottom frame 12. Workers can reach a suitable maintenance height by climbing the first inclined ladder 13 to perform maintenance on the screen 1. The first side edge 111 of the first top frame 11 is located on the outside of the first bottom frame 12, so that when viewed from the side, the first top frame 11 and the first support rod group 14 and the second support rod group 15 form a tapered structure protruding toward the first side edge 111. This allows the first frame 10 to adapt to the non-vertical extension trend of the screen 1. Specifically, when the inside of the spherical screen needs to be maintained, the first frame 10 is placed inside the spherical screen with the first side 111 positioned close to the screen body 1. When the outside of the spherical screen needs to be maintained, the first frame 10 is placed outside the spherical screen with the first side 111 positioned close to the screen body 1. Since the first inclined ladder 13 extends upward toward the first side 111, workers can reach a position close to the screen body 1 by climbing the first inclined ladder 13, facilitating maintenance operations. Therefore, the technical solution of this embodiment can effectively solve the problem of the existing maintenance tooling in the related art that makes spherical screen maintenance difficult.

[0107] Specifically, in this embodiment, the first top frame 11 and the first bottom frame 12 are both rectangular structures. The extending direction of the first side 111 is a first direction a, the extending direction of the two sides connected to the first side 111 is a second direction b, and the first inclined ladder 13 extends along the second direction.

[0108] Specifically, the first frame 10 of this embodiment can be used to maintain the lower part of the spherical screen. When the maintenance height is below a certain height range (for example, the maintenance height is below 1.5m or below 1.8m), the staff can stand directly on the ground to perform maintenance work; when the maintenance height is higher than a certain value, the first frame 10 of this embodiment can be used for maintenance.

[0109] To ensure ease of transport, the first frame 10 is smaller and lighter, and its height is set between 1.8m and 2.2m. By using the first frame 10 of this embodiment, maintenance can be performed on the portion below 3m of a 7m spherical screen.

[0110] In order to further maintain the higher structures, such as Figure 14 and Figure 16As shown, the maintenance frame also includes: a second frame body 20, which is detachably arranged above the first frame body 10, and the second frame body 20 includes a second top frame 21, a second bottom frame 22, a second inclined ladder 23, a third support rod group 24 and a fourth support rod group 25. The second top frame 21 has a second side 211 located on the outside of the second bottom frame 22 and a third side 212 flush with or located on the inside of the second bottom frame 22. The second side 211 and the third side 212 are arranged opposite to each other. In the direction from bottom to top, the second inclined ladder 23 extends toward the second side 211, and the third side 212 is arranged opposite to each other. The third support rod group 24 and the fourth support rod group 25 are connected to the outside of the second top frame 21, the second bottom frame 22 and the second inclined ladder 23 and are arranged opposite to each other. The second side 211 and the third side 212 are located between the third support rod group 24 and the fourth support rod group 25. The second inclined ladder 23, the third support rod group 24 and the fourth support rod group 25 are arranged to form a second ladder space, wherein the second frame 20 has a third working position where the second side 211 is close to the first side 111 and a fourth working position where the second side 211 is away from the first side 111.

[0111] Specifically, when maintenance is required on the part of the spherical screen above 3m, the second frame 20 can be assembled above the first frame 10, and the staff can climb the second inclined ladder 23 to a higher height to perform maintenance operations. Figure 20 As shown, when the interior of the spherical screen needs to be maintained, the first frame 10 is kept in the first working position and the second frame 20 is kept in the third working position, that is, the first side 111 of the first frame 10 is set close to the screen body 1, and the second side 211 of the second frame 20 is set close to the screen body 1. Since the second side 211 is located outside the second bottom frame 22, when viewed from the side, the second top frame 21 and the third support rod group 24 and the fourth support rod group 25 form a structure extending from bottom to top toward the screen body 1, which can adapt to the extension trend of the screen body 1. Figure 24 As shown, when the exterior of the spherical screen needs to be maintained, the first side 111 of the first frame 10 is set away from the screen body 1, and the second side 211 of the second frame 20 is set close to the screen body 1. Since the second side 211 is located on the outside of the second bottom frame 22, when viewed from the side, the second top frame 21 and the third support rod group 24 and the fourth support rod group 25 form a cone-shaped structure protruding toward the screen body 1, which can adapt to the extension trend of the screen body 1.

[0112] It should be noted that, in this embodiment, the second top frame 21 and the second bottom frame 22 are both rectangular structures, and the second side 211 and the third side 212 extend along the first direction a, that is, the second side 211 and the third side 212 are parallel to the first side 111. The above-mentioned "far away" and "close" are both relative. Specifically, when in the third working position, the distance between the second side 211 and the first side 111 in the second direction b is shorter than that between the third side 212 and the first side 111; when in the fourth working position, the distance between the second side 211 and the first side 111 in the second direction b is longer than that between the third side 212 and the first side 111.

[0113] To ensure ease of transport and assembly, the second frame 20 is made smaller and lighter, and its height is set between 1m and 1.4m. By using the first frame 10 and the second frame 20 of this embodiment, maintenance can be performed on the portion above 3m and below 4m of a 7m spherical screen.

[0114] like Figure 19 、 Figure 20 、 Figure 23 and Figure 24 As shown, the first frame 10 and the second frame 20 are detachable structures, the first support rod group 14 has a first plug-in end protruding upward from the first top frame 11; the second support rod group 15 has a second plug-in end protruding upward from the first top frame 11; the third support rod group 24 has a third plug-in end protruding downward from the second bottom frame 22; the fourth support rod group 25 has a fourth plug-in end protruding downward from the second bottom frame 22 shown; wherein, when the second frame 20 is located in the third working position, the first plug-in end is plug-fitted with the third plug-in end, and the second plug-in end is plug-fitted with the fourth plug-in end; when the second frame 20 is located in the fourth working position, the first plug-in end is plug-fitted with the fourth plug-in end, and the second plug-in end is plug-fitted with the third plug-in end.

[0115] Specifically, in this embodiment, the first plug-in end and the second plug-in end are bundle tube structures with relatively small diameters, and the third plug-in end and the fourth plug-in end are sleeve structures with relatively large diameters. The bundle tube structure is inserted into the sleeve structure and then locked with screws.

[0116] Specifically, the plug-in connection parts of the two can be fastened by screw locking to ensure the stability of the connection.

[0117] In order to further maintain the upper part of the spherical screen, such as Figure 14 and Figure 17As shown, the maintenance frame also includes a third frame body 30, which is detachably arranged above the second frame body 20. The third frame body 30 includes a third top frame 31, a third bottom frame 32, a third inclined ladder 33, a fifth support rod group 34 and a sixth support rod group 35. The third top frame 31 has a fourth side 311 located on the outside of the third bottom frame 32 and a fifth side 312 located on the inside of the third bottom frame 32. The fourth side 311 and the fifth side 312 are arranged opposite to each other. In the direction from bottom to top, the third inclined ladder 33 extends toward the fourth side 311, and the fifth support rod group 34 is provided. The group 34 and the sixth support rod group 35 are connected to the outside of the third top frame 31, the third bottom frame 32 and the third inclined ladder 33 and are arranged opposite to each other. The fourth side 311 and the fifth side 312 are located between the fifth support rod group 34 and the sixth support rod group 35. The third inclined ladder 33, the fifth support rod group 34 and the sixth support rod group 35 are arranged to form a third ladder space, wherein the third frame 30 has a fifth working position where the fourth side 311 is close to the second side 211 and a sixth working position where the fourth side 311 is away from the second side 211.

[0118] Specifically, when maintenance is required on the part of the spherical screen that is more than 4 meters high, the third frame 30 can be assembled above the second frame 20, and the staff can climb the third inclined ladder 33 to a higher height to perform maintenance operations. The first frame 10, the second frame 20 and the third frame 30 have a fourth assembly state located inside the spherical screen, such as Figure 21 As shown, when the interior of the spherical screen needs to be maintained, the first frame 10, the second frame 20 and the third frame 30 can be placed in the fourth assembly state. At this time, the first side 111 and the second side 211 are arranged close to the screen body 1, and the fourth side 311 is arranged away from the screen body 1. Since the fifth side 312 is located on the inner side of the third bottom frame 32, when viewed from the side, the third top frame 31 and the fifth support rod group 34 and the sixth support rod group 35 form a structure extending away from the screen body 1 in the bottom-up direction, which can adapt to the extension trend of the screen body 1. The first frame 10, the second frame 20 and the third frame 30 also have a fifth assembly state located outside the spherical screen, as shown in FIG. Figure 25 As shown, when the exterior of the spherical screen needs to be maintained, the first frame 10, the second frame 20 and the third frame 30 can be placed in the fifth assembly state. At this time, the first side 111 is arranged away from the screen body 1, and the second side 211 and the fourth side 311 are both arranged close to the screen body 1. Since the fourth side 311 is located on the outside of the third bottom frame 32, when viewed from the side, the third top frame 31 and the fifth support rod group 34 and the sixth support rod group 35 form a structure extending from bottom to top close to the screen body 1, which can adapt to the extension trend of the screen body 1.

[0119] It should be noted that, in this embodiment, the third top frame 31 and the third bottom frame 32 are both rectangular structures, and the fourth side 311 and the fifth side 312 extend along the first direction a, that is, the fourth side 311 and the fifth side 312 are parallel to the first side 111.

[0120] To ensure ease of transport and assembly, the third frame 30 is made smaller and lighter, and its height is set between 1.5m and 1.8m. By using the first frame 10, second frame 20, and third frame 30 of this embodiment, maintenance can be performed on the portion above 4m and below 5m of a 7m spherical screen.

[0121] like Figure 14 and Figure 18 As shown, in order to further maintain the upper part of the spherical screen, the maintenance frame also includes a fourth frame 40, which is detachably arranged above the third frame 30. The fourth frame 40 includes a fourth top frame 41, a fourth bottom frame 42, a seventh support rod group 43 and an eighth support rod group 44. The seventh support rod group 43 and the eighth support rod group 44 are connected to the outside of the fourth top frame 41 and the fourth bottom frame 42 and are arranged opposite to each other. The fourth top frame 41 has a sixth side 411 located on the inner side of the fourth bottom frame 42 and a seventh side 412 flush with or located on the outer side of the fourth bottom frame 42. The sixth side 411 and the seventh side 412 are located between the seventh support rod group 43 and the eighth support rod group 44. An operating space is formed between the seventh support rod group 43 and the eighth support rod group 44. When the fourth frame 40 is installed on the third frame 30, the seventh side 412 is arranged close to the fourth side 311.

[0122] The fourth top frame 41 and the fourth bottom frame 42 are both rectangular structures, and the sixth side 411 and the seventh side 412 extend along the first direction a, that is, the sixth side 411 and the seventh side 412 are parallel to the first side 111 .

[0123] Specifically, if Figure 22 and Figure 26 As shown, when maintenance is required on the portion above 5 m of the 7 m spherical screen, the fourth frame 40 can be assembled above the third frame 30. The first frame 10, the second frame 20, the third frame 30 and the fourth frame 40 have a sixth assembly state located inside the spherical screen, as shown in FIG. Figure 22As shown, when the interior of the spherical screen needs to be maintained, the first frame 10, the second frame 20, the third frame 30 and the fourth frame 40 can be placed in the sixth assembly state. At this time, the first side 111 and the second side 211 are arranged close to the screen body 1, the fourth side 311 and the seventh side 412 are arranged away from the screen body 1, and the sixth side 411 is located on the inner side of the fourth bottom frame 42 and the sixth side 411 is arranged close to the screen body 1, so that when viewed from the side, the fourth top frame 41 and the seventh support rod group 43 and the eighth support rod group 44 form a structure extending away from the screen body 1 in the bottom-up direction, which can adapt to the extension trend of the screen body 1. In order to ensure the safety of workers at heights, a removable third barrier can be provided on the side of the seventh support rod group 43 and the eighth support rod group 44 away from the spherical screen. The first frame 10, the second frame 20, the third frame 30 and the fourth frame 40 have the seventh assembly state located outside the spherical screen, as shown in FIG. Figure 26 As shown, when the exterior of the spherical screen needs to be maintained, the first frame 10, the second frame 20, the third frame 30 and the fourth frame 40 can be placed in the seventh assembly state. At this time, the first side 111 is set away from the screen body 1, and the second side 211, the fourth side 311 and the seventh side 412 are all set close to the screen body 1. Figure 26 As shown, in order to ensure the safety of workers at heights, a detachable third barrier rod may be provided on the side of the seventh support rod group 43 and the eighth support rod group 44 away from the spherical screen.

[0124] It should be noted that the connection method between the third frame 30 and the second frame 20 and the connection method between the fourth frame 40 and the third frame 30 are the same as the connection method between the second frame 20 and the first frame 10, and will not be repeated here.

[0125] like Figure 27 and Figure 28As shown, in order to further ensure the stability of the portion above 5 m inside the 7 m spherical screen (including the dome portion) during maintenance, the maintenance frame also includes a second connecting cross frame 60. When the first frame 10, the second frame 20, the third frame 30, the fourth frame 40, and the second connecting cross frame 60 are assembled together, the first frame 10, the second frame 20, the third frame 30, the fourth frame 40, and the second connecting cross frame 60 have an eighth assembly state located inside the spherical screen. In the eighth assembly state, one first frame 10, one second frame 20, one third frame 30, and one fourth frame 40 form a second installation group 200. In the second installation group 200, the first side 111 is arranged close to the screen body 1, and the second side 211, the fourth side 311, and the seventh side 412 are all arranged away from the screen body 1. The two second installation groups 200 are respectively arranged close to the screen body 1 in the radial direction of the spherical screen, and the second connecting cross frame 60 is connected between the two fourth sides 311 in the two second installation groups 200. The two second installation groups 200 and the second connecting cross frame 60 form a stable support structure, and a support plate can be set above the second connecting cross frame 60 so that the staff can stand directly under the dome for maintenance. Figure 28 As shown, in order to further ensure the safety of workers at heights, a fourth barrier bar can be set between the two seventh side edges 412 of the two second installation groups 200; in order to further ensure the stability of the maintenance frame in the eighth assembly state, a supporting cross bar 26 can be set between the two second side edges 211 of the two second installation groups 200.

[0126] Preferably, the second connecting cross frame 60 includes two tie rods.

[0127] In order to ensure the convenience of transportation and assembly, the fourth frame 40 is made smaller in size and lighter in weight, and the height of the fourth frame 40 is set between 1m and 1.2m.

[0128] like Figures 14 to 28 As shown, the first support rod group 14, the second support rod group 15, the third support rod group 24, the fourth support rod group 25, the fifth support rod group 34, the sixth support rod group 35, the seventh support rod group 43 and the eighth support rod group 44 all include multiple support vertical rods, and may also include horizontal rods and diagonal rods connecting adjacent support vertical rods to ensure the structural strength of the first frame 10, the second frame 20, the third frame 30 and the fourth frame 40.

[0129] Due to the large size of the 7m spherical screen, in order to ensure the stability of the maintenance frame in each assembly state, compared with the first embodiment, in this embodiment, each support rod group can have more support poles, that is, the size of each frame in the second direction b is increased.

[0130] like Figure 14 and Figure 16As shown, the second frame body 20 includes two second inclined ladders 23 arranged at intervals, which facilitates the staff to climb.

[0131] Since the space inside the spherical screen for placing the maintenance frame is relatively narrow, the size of the first bottom frame 12 of the first frame body 10 needs to be set smaller. To ensure the stability of the maintenance frame in various assembled states, the first bottom frame 12 includes a first mounting cylinder 121, a second mounting cylinder 122, a first connecting rod 123 and a second connecting rod 124. The first support rod group 14 is connected above the first mounting cylinder 121, the second support rod group 15 is connected above the second mounting cylinder 122, and the first connecting rod 123 and the second connecting rod 124 are connected between the first mounting cylinder 121 and the second mounting cylinder 122. The maintenance frame further includes a first support bottom frame 71 and a second support bottom frame 72. The first support bottom frame 71 is located outside the first connecting rod 123 and telescopically penetrates through the first mounting cylinder 121 and the second mounting cylinder 122. The second support bottom frame 72 is located outside the second connecting rod 124 and telescopically penetrates through the first mounting cylinder 121 and the second mounting cylinder 122. Specifically, the first support bottom frame 71 includes a first support rod 711 extending along the first direction a, and second support rods 712 and third support rods 713 connected to both ends of the first support rod 711 and extending along the second direction b. The second support rod 712 is telescopically inserted into the first mounting cylinder 121, and the third support rod 713 is telescopically inserted into the second mounting cylinder 122. After confirming the extended lengths of the second support rod 712 and the third support rod 713, the second support rod 712 and the first mounting cylinder 121 can be fixed with screws, and the third support rod 713 and the second mounting cylinder 122 can be fixed.

[0132] It should be noted that to ensure sufficient activity space for the staff, the first top frame 11, the first bottom frame 12, the second top frame 21, the second bottom frame 22, the fourth top frame 41 and the fourth bottom frame 42 can be an incompletely closed structure, that is, it can be a "匚" (including one side frame extending along the first direction a and two side frames extending along the second direction b) or only have two side frames extending along the second direction b. The first side edge 111 in this embodiment refers to the connection line between the two corresponding ends of the first support rod group 14 and the second support rod group 15; the second side edge 211 and the third side edge 212 refer to the connection lines between the two corresponding groups of ends of the third support rod group 24 and the fourth support rod group 25; the sixth side edge 411 and the seventh side edge 412 refer to the connection lines between the two groups of ends of the seventh support rod group 43 and the eighth support rod group 44.

[0133] The following describes a preferred implementation manner in the first embodiment of this:

[0134] The first frame 10 is welded from 6061-T6 aluminum alloy with a wall thickness of 3 mm. The welding process is AC tungsten inert gas arc welding. It weighs 24 kg and has dimensions of 2030 (height) * 860 (dimension in the first direction a) * 1300 (dimension in the second direction b). It has the advantages of light weight and high strength.

[0135] The second frame 20 is welded from 6061-T6 aluminum alloy with a wall thickness of 3 mm. The welding process is AC tungsten inert gas arc welding. It weighs 21 kg and has dimensions of 1200 (height) * 840 (dimension in the first direction a) * 1440 (dimension in the second direction b). It has the advantages of light weight and high strength.

[0136] The third frame 30 is welded from 6061-T6 aluminum alloy with a wall thickness of 3 mm. The welding process is AC tungsten inert gas arc welding. It weighs 27 kg and has dimensions of 1650 (height) * 840 (dimension in the first direction a) * 2010 (dimension in the second direction b). It has the advantages of light weight and high strength.

[0137] The fourth frame 40 and the third gear lever are welded from 6061-T6 aluminum alloy with a wall thickness of 3 mm. The welding process adopts AC tungsten inert gas arc welding. It weighs 5.6 kg and can be carried by one hand.

[0138] The first support base 71 and the second support base 72 are made of galvanized steel with a wall thickness of 5 mm, which has the advantage of high strength. The length of the first support rod 711 is 1700 mm, and the length of the second support rod 712 and the third support rod 713 is 1200 mm.

[0139] When constructing, you must first determine the location and height of the maintenance frame. When maintaining the side wall of the spherical screen, you only need to build the frame on one side; when you need to maintain the dome of the spherical screen, you need to build the frames on both sides and use the first connecting crossbeam 50 to connect the frames on both sides. The maintenance frame can be built to a maximum height of 4.5m.

[0140] When maintaining the interior of the spherical screen below 3 meters, you first need to remove the inner and outer skirt panels at the bottom of the spherical screen so that the first support base 71 can extend under the spherical screen. Since the inner and outer skirt panels are magnetic, they are easy to remove. Then, place the first frame 10 inside the spherical screen, install the second support rod 712 into the first mounting tube 121, and install the third support rod 713 into the second mounting tube 122. Then, install the first support rod 711 on the outer ends of the second support rod 712 and the third support rod 713, and finally tighten them with screws. The connection method between the second support base 72 and the first frame 10 is the same as the connection method between the first support base 71 and the first frame 10, so it will not be repeated here. After the first frame 10, the first support base 71, and the second support base 72 are connected, you can begin maintenance on the section below 3 meters.

[0141] When maintaining the portion of the spherical screen that is more than 3 m and less than 4 m in depth, it is necessary to further install the second frame 20 on the first frame 10 .

[0142] When maintaining the portion of the spherical screen that is more than 4 m and less than 5 m in depth, a third frame 30 needs to be further installed on the second frame 20 .

[0143] When maintaining the interior of the spherical screen at a height of more than 5 m and less than 6 m, it is necessary to further install the fourth frame 40 on the third frame 30. To ensure the safety of workers at high altitudes, a detachable third barrier rod can be provided on the side of the seventh support rod group 43 and the eighth support rod group 44 away from the spherical screen. Preferably, the third barrier rod is a pull rod structure and is fixed by a clip.

[0144] When maintenance is required on the dome area inside the spherical screen, due to the high height of the dome and the greater risk, a frame is constructed on both sides. A second connecting crossbar 60 is used to connect and lock the two in the middle, and then a support plate is laid on top. This increases safety while also avoiding other equipment in the middle of the spherical screen. The second connecting crossbar 60 includes two tie rods, each secured to the fourth side 311 by a clip. It should be noted that when performing maintenance on the dome, the maintenance frame can be constructed on both sides of the corridor platform inside the spherical screen, without removing the inner and outer skirt panels of the spherical screen.

[0145] When maintaining the outer portion of the spherical screen below 3 meters, it is only necessary to connect the first frame 10, the first supporting base 71 and the second supporting base 72, lift the outer skin of the spherical screen and support it with a support rod, and then maintain the screen body 1 inside the skin.

[0146] When maintaining the outer part of the spherical screen within 3m and 4m, it is necessary to further install the second frame 20 on the first frame 10, lift the outer skin of the spherical screen and support it with a support rod, and then maintain the screen body 1 inside the skin.

[0147] When maintaining the outer part of the spherical screen within 4m and 5m, it is necessary to further install the third frame 30 on the second frame 20, lift the outer skin of the spherical screen and support it with a support rod, and then maintain the screen body 1 inside the skin.

[0148] When maintaining the exterior of the spherical screen at a height of more than 5 meters, a fourth frame 40 needs to be installed on the third frame 30. The skin above 5 meters is fixed to the steel structure at the top. Lift the skin on the exterior of the spherical screen and support it with a support rod, and then perform maintenance on the screen body 1 inside the skin. The skin in the upper area is magnetically attracted, so you can directly remove the skin and then perform maintenance on the screen body 1 inside the skin, or climb up the steel structure of the spherical screen to perform maintenance on the dome. It should be noted that when performing maintenance on the exterior of the spherical screen at a height of more than 5 meters, the first frame 10, the second frame 20, the third frame 30, and the fourth frame 40 need to be assembled. At this time, a lift can be used to facilitate the construction of the maintenance frame.

[0149] In this embodiment, the maintenance rack is lightweight and easy to carry, making it suitable for space-constrained environments and enabling comprehensive maintenance of the spherical screen's interior and exterior. The maintenance rack is simple to construct and easy to operate, requiring only two or three people to complete the installation within an hour. It also offers high stability, enabling maintenance of spherical screens extending over 6 meters.

[0150] It should be noted that this application uses 5m and 7m spherical screens as examples to provide two maintenance rack embodiments, as well as the overlapping methods of the individual racks in these two embodiments. The maintenance racks of this application can still be used for spherical screens of other sizes, and even for wraparound screen structures of other structures (such as polyhedron screens). Only minor adjustments to the dimensions of the individual racks or a reduction / increase in the number of racks are required.

[0151] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0152] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0153] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0154] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A maintenance stand for a spherical screen, the spherical screen having a screen body (1), characterized in that: The maintenance frame includes: The first frame (10) comprises a first top frame (11), a first bottom frame (12), a first inclined ladder (13), a first support rod group (14) and a second support rod group (15), wherein the first top frame (11) has a first side edge (111) located on the outside of the first bottom frame (12), the first inclined ladder (13) is connected between the first top frame (11) and the first bottom frame (12), and in a direction from bottom to top, the first inclined ladder (13) extends toward the first side edge (111), the first support rod group (14) and the second support rod group (15) are connected to the outsides of the first top frame (11), the first bottom frame (12) and the first inclined ladder (13) and are arranged opposite to each other, the first side edge (111) is located between the first support rod group (14) and the second support rod group (15), and the first inclined ladder (13), the first support rod group (14) and the second support rod group (15) are enclosed to form a first climbing ladder space, The first frame (10) has a first working position located on the inner side of the spherical screen and with the first side (111) close to the screen body (1), and a second working position located on the outer side of the spherical screen and with the first side (111) close to the screen body (1).

2. The maintenance stand according to claim 1, characterized in that: The maintenance frame also includes: The second frame (20) is detachably arranged above the first frame (10), and the second frame (20) comprises a second top frame (21), a second bottom frame (22), a second inclined ladder (23), a third support rod group (24) and a fourth support rod group (25). The second top frame (21) has a second side edge (211) located on the outside of the second bottom frame (22) and a third side edge (212) flush with or located on the inside of the second bottom frame (22). The second side edge (211) and the third side edge (212) are arranged relative to each other in a direction from bottom to top. The second inclined ladder (23) extends toward the second side (211), the third support rod group (24) and the fourth support rod group (25) are connected to the outer sides of the second top frame (21), the second bottom frame (22) and the second inclined ladder (23) and are arranged opposite to each other, the second side (211) and the third side (212) are located between the third support rod group (24) and the fourth support rod group (25), and the second inclined ladder (23), the third support rod group (24) and the fourth support rod group (25) are surrounded to form a second climbing ladder space. The second frame (20) has a third working position in which the second side (211) is close to the first side (111) and a fourth working position in which the second side (211) is far from the first side (111).

3. The maintenance stand according to claim 2, characterized in that: The first support rod group (14) has a first plug-in end portion protruding upward from the first top frame (11); The second support rod group (15) has a second plug-in end portion protruding upward from the first top frame (11); The third support rod group (24) has a third plug-in end portion protruding downward from the second bottom frame (22); The fourth support rod group (25) has a fourth plug-in end portion protruding downward from the second bottom frame (22); Wherein, when the second frame (20) is located at the third working position, the first plug-in end is plug-fitted with the third plug-in end, and the second plug-in end is plug-fitted with the fourth plug-in end; when the second frame (20) is located at the fourth working position, the first plug-in end is plug-fitted with the fourth plug-in end, and the second plug-in end is plug-fitted with the third plug-in end.

4. The maintenance stand according to claim 2, characterized in that: The maintenance frame also includes: The third frame (30) is detachably arranged above the second frame (20), and the third frame (30) includes a third top frame (31), a third bottom frame (32), a third inclined ladder (33), a fifth support rod group (34) and a sixth support rod group (35). The third top frame (31) has a fourth side (311) located on the outside of the third bottom frame (32) and a fifth side (312) located on the inside of the third bottom frame (32). The fourth side (311) and the fifth side (312) are arranged relative to each other. In the direction from bottom to top, The third inclined ladder (33) extends toward the fourth side (311), the fifth support rod group (34) and the sixth support rod group (35) are connected to the outside of the third top frame (31), the third bottom frame (32) and the third inclined ladder (33) and are arranged opposite to each other, the fourth side (311) and the fifth side (312) are located between the fifth support rod group (34) and the sixth support rod group (35), and the third inclined ladder (33), the fifth support rod group (34) and the sixth support rod group (35) are enclosed to form a third ladder climbing space. The third frame (30) has a fifth working position in which the fourth side (311) is disposed close to the second side (211) and a sixth working position in which the fourth side (311) is disposed away from the second side (211).

5. The maintenance stand according to claim 4, characterized in that: The maintenance frame also includes: The fourth frame (40) is detachably arranged above the second frame (20) or the third frame (30), and the fourth frame (40) includes a fourth top frame (41), a fourth bottom frame (42), a seventh support rod group (43) and an eighth support rod group (44), the seventh support rod group (43) and the eighth support rod group (44) are connected to the outer sides of the fourth top frame (41) and the fourth bottom frame (42) and are arranged opposite to each other, the fourth top frame (41) has a sixth side (411) located on the inner side of the fourth bottom frame (42) and a seventh side (412) flush with or located on the outer side of the fourth bottom frame (42), the sixth side (411) and the seventh side (412) are located between the seventh support rod group (43) and the eighth support rod group (44), and an operating space is formed between the seventh support rod group (43) and the eighth support rod group (44), wherein, When the fourth frame (40) is installed on the second frame (20), the seventh side (412) is arranged close to the second side (211); When the fourth frame (40) is installed on the third frame (30), the seventh side (412) is arranged close to the fourth side (311).

6. The maintenance stand according to claim 5, characterized in that: When the first frame (10), the second frame (20) and the fourth frame (40) are assembled together, The first frame (10), the second frame (20) and the fourth frame (40) have a first assembled state located inside the spherical screen, in which the first side (111) is arranged close to the screen (1), and the second side (211) and the seventh side (412) are arranged away from the screen (1); and / or, The first frame (10), the second frame (20) and the fourth frame (40) have a second assembly state located outside the spherical screen, and in the second assembly state, the first side (111), the second side (211) and the seventh side (412) are all arranged close to the screen (1).

7. The maintenance stand according to claim 5, characterized in that: The maintenance frame further comprises a first connecting cross frame (50). When the first frame body (10), the second frame body (20), the fourth frame body (40) and the first connecting cross frame (50) are assembled together, the first frame body (10), the second frame body (20), the fourth frame body (40) and the first connecting cross frame (50) have a third assembly state located inside the spherical screen. In the third assembly state: A first frame (10), a second frame (20) and a fourth frame (40) form a first installation group (100); in the first installation group (100), the first side edge (111) is arranged close to the screen body (1), and the second side edge (211) and the seventh side edge (412) are arranged away from the screen body (1); the two first installation groups (100) are respectively arranged close to the screen body (1) in the radial direction of the spherical screen; and the first connecting cross frame (50) is connected between the two second side edges (211) in the two first installation groups (100).

8. The maintenance stand according to claim 4, characterized in that: When the first frame (10), the second frame (20) and the third frame (30) are assembled together, The first frame (10), the second frame (20) and the third frame (30) have a fourth assembly state located inside the spherical screen, in which the first side edge (111) and the second side edge (211) are arranged close to the screen body (1), and the fourth side edge (311) is arranged away from the screen body (1); and / or, The first frame (10), the second frame (20) and the third frame (30) have a fifth assembly state located outside the spherical screen. In the fifth assembly state, the first side (111) is arranged away from the screen (1), and the second side (211) and the fourth side (311) are both arranged close to the screen (1).

9. The maintenance stand according to claim 5, characterized in that: When the first frame (10), the second frame (20), the third frame (30) and the fourth frame (40) are assembled together, The first frame (10), the second frame (20), the third frame (30) and the fourth frame (40) have a sixth assembly state located inside the spherical screen, in which the first side (111) and the second side (211) are arranged close to the screen (1), and the fourth side (311) and the seventh side (412) are arranged away from the screen (1); and / or, The first frame (10), the second frame (20), the third frame (30) and the fourth frame (40) have a seventh assembly state located outside the spherical screen. In the seventh assembly state, the first side (111) is arranged away from the screen (1), and the second side (211), the fourth side (311) and the seventh side (412) are all arranged close to the screen (1).

10. The maintenance stand according to claim 5, characterized in that: The maintenance frame further includes a second connecting cross frame (60). When the first frame body (10), the second frame body (20), the third frame body (30), the fourth frame body (40) and the second connecting cross frame (60) are assembled together, the first frame body (10), the second frame body (20), the third frame body (30), the fourth frame body (40) and the second connecting cross frame (60) have an eighth assembly state located inside the spherical screen. In the eighth assembly state: A first frame (10), a second frame (20), a third frame (30) and a fourth frame (40) form a second installation group (200); in the second installation group (200), the first side (111) is arranged close to the screen body (1); the second side (211), the fourth side (311) and the seventh side (412) are all arranged away from the screen body (1); two second installation groups (200) are respectively arranged close to the screen body (1) in the radial direction of the spherical screen; and the second connecting cross frame (60) is connected between the two fourth side edges (311) in the two second installation groups (200).

11. The maintenance stand according to any one of claims 8 to 10, characterized in that: The second frame (20) includes two second inclined ladders (23) arranged at intervals.

12. The maintenance stand according to any one of claims 1 to 10, characterized in that: The first bottom frame (12) includes a first mounting tube (121), a second mounting tube (122), a first connecting rod (123) and a second connecting rod (124); the first support rod group (14) is connected above the first mounting tube (121); the second support rod group (15) is connected above the second mounting tube (122); the first connecting rod (123) and the second connecting rod (124) are connected between the first mounting tube (121) and the second mounting tube (122); the maintenance frame also includes a first supporting base frame (71) and a second supporting base frame (72); the first supporting base frame (71) is located outside the first connecting rod (123) and is telescopically arranged in the first mounting tube (121) and the second mounting tube (122); the second supporting base frame (72) is located outside the second connecting rod (124) and is telescopically arranged in the first mounting tube (121) and the second mounting tube (122).

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