Integral lifting device for super-large area steel truss and use method thereof

Abstract

This invention relates to the field of steel space frame lifting technology, specifically to an integrated lifting device and method for ultra-large area steel space frames. It solves the problem that existing methods for lifting ultra-large area steel space frames require the hoisting and splicing of the lifting frame during the lifting process, which is time-consuming, labor-intensive, and poses safety risks to personnel. The invention includes an extended lifting mechanism and a splicing upright frame. A supporting feeding mechanism is installed on the outer side of the extended lifting mechanism, and a splicing upright frame is installed at the upper end of the supporting feeding mechanism. The splicing upright frame is formed by sequentially splicing multiple upright frame mechanisms, each consisting of a first splicing unit and a second splicing unit, both of which include cross-frame blocks. This invention achieves the lifting of the steel space frame by lifting the splicing upright frame, and automatically performs feeding and assembly during lifting, eliminating the need for manual hoisting and assembly operations, saving time and labor, and ensuring high operational safety.

Description

Technical Field

[0001] This invention relates to the field of steel space frame lifting technology, specifically to an integrated lifting device and its usage method for ultra-large area steel space frames. Background Technology

[0002] With the increasing popularity of large-area steel grid structure roofs in modern prefabricated factory buildings. As the design area and weight of steel space frames increase, traditional methods such as high-altitude assembly, overall hoisting, and segmented installation become increasingly limited due to their long construction cycles, high risk factors, high manpower and material costs, and constraints imposed by site conditions. These traditional methods can no longer meet the installation requirements of modern large-area and heavy-weight steel space frames. To address the difficulties and challenges of constructing large-area and heavy-weight space frames, the overall lifting method can significantly save manpower and material resources, solve problems such as limited space and restrictions on the specifications of large machinery and equipment, improve the economic efficiency of the project, shorten the construction period, and make the construction of large-area steel space frames faster, more convenient, safer, and more reliable.

[0003] Existing construction methods for lifting ultra-large area steel space frames require hoisting and assembling the lifting frame during the lifting process, which is time-consuming, labor-intensive, and does not guarantee personnel safety. Therefore, these methods do not meet the current requirements. To address this, we propose an integrated lifting device and its usage method for ultra-large area steel space frames. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated lifting device and method for using ultra-large area steel space frame, so as to solve the problem mentioned in the background art that the existing construction method for overall lifting of ultra-large area steel space frame requires hoisting and splicing of the lifting frame during the lifting process, which is time-consuming, labor-intensive, and inconvenient to ensure personnel safety.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated lifting device for an ultra-large area steel grid frame, comprising an extended lifting mechanism and a splicing upright frame. A supporting feeding mechanism is installed on the outer side of the extended lifting mechanism, and a splicing upright frame is installed on the upper end of the supporting feeding mechanism. The splicing upright frame is formed by sequentially splicing multiple upright frame mechanisms. The upright frame mechanism consists of a first splicing unit and a second splicing unit. Both the first splicing unit and the second splicing unit include a cross frame. Splicing columns are fixedly installed at both ends of the cross frame, and a lifting connecting block is fixedly installed on one side of the bottom of the splicing column.

[0006] The first splicing unit also includes a first positioning frame that is fixedly connected to two of the splicing columns, and a plurality of positioning plugs are fixedly provided at the end of the first positioning frame away from the splicing columns;

[0007] The second splicing unit also includes a second positioning frame that is fixedly connected to two other splicing columns. Multiple guide sleeves are fixedly installed at the end of the second positioning frame away from the splicing columns. A connecting rod is slidably connected to the inner side of the guide sleeve, and a sealing strip is provided on one side of the guide sleeve.

[0008] Preferably, the supporting feeding mechanism includes a supporting base, a positioning support plate is fixedly installed on the upper end of the supporting base, a material placement guide plate is fixedly installed on both sides of the positioning support plate, a feeding push plate is slidably connected to the upper end surface of the material placement guide plate, a drive motor is fixedly installed on one end of one of the material placement guide plates, and a drive screw and a guide rod arranged in parallel are installed between the bottom ends of the two material placement guide plates.

[0009] Preferably, the extended lifting mechanism includes a hydraulic cylinder, a transmission plate is fixedly installed at the output end of the hydraulic cylinder, four electric cylinders are fixedly installed at the middle of the upper surface of the transmission plate, and a lifting slider is fixedly installed at the output end of the electric cylinder.

[0010] Preferably, a steel grid positioning mechanism is installed at the upper end of the splicing frame. The steel grid positioning mechanism includes a connecting frame, and an installation groove plate is fixedly installed at the upper end of the connecting frame. Multiple support slides are slidably connected to the upper end surface of the installation groove plate, and a positioning seat is fixedly installed at the middle of the upper end surface of each support slide.

[0011] Preferably, the first splicing unit and the second splicing unit are installed symmetrically. One side of the second positioning frame is provided with an insertion hole. The positioning plug and the sealing strip are respectively inserted into the inner side of both ends of the insertion hole. The first positioning frame and the second positioning frame are in close contact. The guide sleeve and the connecting rod are connected by a spring. One end of the connecting rod is fixed relative to the guide sleeve by the spring. The other end of the connecting rod passes through the guide sleeve and is inserted into the positioning plug.

[0012] Preferably, two adjacent lifting connecting blocks are symmetrically installed relative to the cross frame, four lifting sliders are arranged circumferentially relative to the transmission plate, the four lifting sliders and the lifting connecting blocks are installed in a one-to-one correspondence, two adjacent splicing columns are interlocked, and the splicing columns are interlocked with the positioning support plate and the connecting frame.

[0013] Preferably, the two material placement guide plates and the feeding push plate are symmetrically installed relative to the positioning support plate. The bottom end of the feeding push plate passes through the material placement guide plate and is sleeved on the outside of the transmission screw and the guide rod. The feeding push plate is slidably connected to the guide rod. The output end of the transmission motor is connected to the transmission screw through a coupling. The two ends of the transmission screw are provided with external threads with opposite directions of rotation. The two ends of the transmission screw are threadedly connected to the two feeding push plates. The two feeding push plates reciprocate in opposite directions along the axis of the transmission screw.

[0014] Preferably, the bottom end of the hydraulic cylinder is fixedly connected to the support base, and the output end of the hydraulic cylinder is fixedly connected to the four electric cylinders through a transmission plate. The transmission plate slides vertically back and forth along the axis of the hydraulic cylinder on the inner side of the positioning support plate.

[0015] Preferably, the plurality of the support slides are arranged linearly along the axis of the mounting groove plate, the mounting groove plate and the support slides are connected and fixed by screws, and the upper end surface of the positioning seat is provided with an arc groove.

[0016] A method for using an integrated lifting device for an ultra-large area steel space frame includes the following steps:

[0017] S1: When lifting and lowering a large-area steel grid frame, the two material placement guide plates and the feeding push plate are symmetrically installed relative to the positioning support plate. The power is turned on, and the first splicing unit and the second splicing unit that form the frame mechanism are placed symmetrically on the upper surface of the two material placement guide plates. The drive motor is started, so that the drive motor drives the two feeding push plates to move towards each other through the drive screw under the support of the material placement guide plates. Then, the feeding push plates push the first splicing unit and the second splicing unit towards each other to the upper surface of the positioning support plate under the guidance of the material placement guide plates. Then the feeding push plates are reset.

[0018] S2: A socket is provided on one side of the second positioning frame. The sealing strip is inserted into the inside of the socket. When the first splicing unit and the second splicing unit are spliced ​​together, the first positioning frame drives the positioning plug to be inserted into the inside of the socket and pushes out the sealing strip. At this time, the connecting rod can automatically pass through the second positioning frame and be inserted into the positioning plug under the support of the spring provided inside the guide sleeve, thereby realizing the automatic splicing of the first splicing unit and the second splicing unit and forming a frame mechanism.

[0019] S3: At this time, the mounting plate is installed by inserting it into the upper end of the frame mechanism through the connecting bracket. At the same time, the spacing of multiple support slides is adjusted according to the support node position of the steel grid, so that multiple support slides can provide multi-point synchronous support for the steel grid through the arc groove provided on the upper end of the positioning seat, effectively improving the support stability of the steel grid. The hydraulic cylinder is started, so that the hydraulic cylinder, under the support of the support base, drives the lifting slider and electric cylinder to move upward synchronously through the transmission plate.

[0020] S4: Under the support of the transmission plate, the electric cylinder drives the lifting slider to slide horizontally. Then, the lifting slider can lift the splicing column through the lifting connecting block to realize the overall lifting operation of the frame mechanism. The upward movement distance of the frame mechanism is greater than the length of the splicing column. After the frame mechanism is lifted, the first splicing unit and the second splicing unit are fed again by the feeding push plate and assembled to form another set of frame mechanisms.

[0021] S5: Then the lifting slider is reset. At this time, the upper frame mechanism falls under gravity and automatically connects with another set of frame mechanisms. Repeated assembly and lifting operations of the frame mechanism facilitate the adjustment of the length of the spliced ​​frame, thereby achieving stable lifting of the steel grid frame.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. In this invention, a drive motor drives two feeding push plates to move towards each other via a drive screw. Under the guidance of a material guide plate, the feeding push plates push the first splicing unit and the second splicing unit towards each other to the upper surface of the positioning support plate. When the first splicing unit and the second splicing unit are spliced ​​together, the first positioning frame drives the positioning plug to be inserted into the inner side of the insertion hole and pushes out the sealing strip. Under the support of the spring provided inside the guide sleeve, the connecting rod can automatically pass through the second positioning frame and be inserted into the positioning plug for installation. This realizes the automatic splicing of the first splicing unit and the second splicing unit to form a frame mechanism. The mounting slot plate is inserted into the upper end of the frame mechanism through the connecting frame. At the same time, the spacing of multiple support slides is adjusted according to the support node position of the steel grid frame, so that multiple support slides can provide multi-point synchronous support for the steel grid frame through the arc groove provided on the upper surface of the positioning seat, effectively improving the support stability of the steel grid frame.

[0024] 2. In this invention, the hydraulic cylinder synchronously drives the lifting slider and the electric cylinder to move upward through the transmission plate. The electric cylinder drives the lifting slider to slide horizontally, and the lifting slider can lift the splicing column through the lifting connecting block, realizing the overall lifting operation of the frame mechanism. The upward movement distance of the frame mechanism is greater than the length of the splicing column. After the frame mechanism is lifted, the first and second splicing units are fed again by the feeding push plate and assembled to form another set of frame mechanisms. Then the lifting slider is reset. At this time, the upper frame mechanism falls under gravity and automatically plugs into the other set of frame mechanisms. Repeated assembly and lifting operations of the frame mechanism facilitate the adjustment of the length of the splicing frame, thereby realizing the stable lifting of the steel grid frame, saving hoisting and manual assembly, and ensuring personnel safety. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a front view of the entire invention;

[0027] Figure 3 This is a schematic diagram of the structure of the feeding mechanism of the present invention;

[0028] Figure 4This is a schematic diagram of the splicing frame structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the support mechanism of the present invention;

[0030] Figure 6 This is a cross-sectional structural diagram of the support mechanism of the present invention;

[0031] Figure 7 This is an exploded structural diagram of the support mechanism of the present invention;

[0032] Figure 8 This is a schematic diagram of the steel space frame positioning mechanism of the present invention;

[0033] Figure 9 This is a cross-sectional structural diagram of the steel space frame positioning mechanism of the present invention.

[0034] In the diagram: 1. Support feeding mechanism; 101. Support base; 102. Positioning support plate; 103. Material placement guide plate; 104. Drive motor; 105. Drive screw; 106. Feeding push plate; 107. Guide rod; 2. Extended lifting mechanism; 201. Hydraulic cylinder; 202. Drive plate; 203. Lifting slider; 204. Electric cylinder; 3. Splicing upright; 4. Steel grid frame positioning mechanism; 401. Connecting frame; 402. Mounting slot plate; 403. Support slide; 404. Positioning seat; 5. Upright mechanism; 501. First splicing unit; 502. Second splicing unit; 503. Splicing column; 504. Cross frame; 505. First positioning frame; 506. Second positioning frame; 507. Lifting connecting block; 508. Guide sleeve; 509. Connecting rod; 510. Sealing strip; 511. Positioning plug. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] The drive motor 104 (model GV50-3.7KW-60-S), hydraulic cylinder 201 (model HOB80X250-100), and electric cylinder 204 (model HTKC-35) mentioned in this invention can all be obtained from the market or through private customization.

[0037] Please see Figures 1 to 3An embodiment of the present invention provides an integrated lifting device for an ultra-large area steel grid frame, comprising an extended lifting mechanism 2 and a spliced ​​upright frame 3. A supporting feeding mechanism 1 is installed on the outside of the extended lifting mechanism 2. The supporting feeding mechanism 1 includes a supporting base 101. A positioning support plate 102 is fixedly installed on the upper end of the supporting base 101. Material placement guide plates 103 are fixedly installed on both sides of the positioning support plate 102. A feeding push plate 106 is slidably connected to the upper end surface of the material placement guide plate 103. The two material placement guide plates 103 and the feeding push plate 106 are symmetrically installed relative to the positioning support plate 102. The two material placement guide plates 103 and the feeding push plate 106 facilitate the positioning of the material before the upright frame mechanism 5 is assembled.

[0038] One end of one of the material placement guide plates 103 is fixedly mounted with a drive motor 104. A drive screw 105 and a guide rod 107 arranged in parallel are installed between the bottom ends of the two material placement guide plates 103. The output end of the drive motor 104 is connected to the drive screw 105 through a coupling. The two ends of the drive screw 105 are provided with external threads with opposite directions of rotation. The two ends of the drive screw 105 are threadedly connected to the two feeding push plates 106. The two feeding push plates 106 slide back and forth in opposite directions along the axis of the drive screw 105. The bottom end of the feeding push plate 106 passes through the material placement guide plate 103 and is sleeved on the outside of the drive screw 105 and the guide rod 107. The feeding push plate 106 is slidably connected to the guide rod 107. Under the guidance of the material placement guide plate 103, the feeding push plate 106 pushes the frame mechanism 5 to the upper end face of the positioning support plate 102 to realize automatic feeding and assembly operation.

[0039] Please see Figures 1 to 7The upper end of the supporting feeding mechanism 1 is equipped with a splicing upright 3. The splicing upright 3 is formed by sequentially splicing multiple upright mechanisms 5. The upright mechanism 5 consists of a first splicing unit 501 and a second splicing unit 502. Both the first splicing unit 501 and the second splicing unit 502 include a cross frame 504. Both ends of the cross frame 504 are fixedly installed with splicing columns 503. A lifting connecting block 507 is fixedly installed on one side of the bottom of the splicing column 503. The first splicing unit 501 also includes a first positioning frame 505 fixedly connected to two of the splicing columns 503. The end of the first positioning frame 505 away from the splicing column 503 is fixedly provided with multiple positioning plugs 511. The second splicing unit 502 also includes a positioning frame 505 fixedly connected to the other two splicing columns. A second positioning frame 506 is fixedly connected to 503. Multiple guide sleeves 508 are fixedly installed at one end of the second positioning frame 506 away from the splicing column 503. A connecting rod 509 is slidably connected to the inner side of the guide sleeve 508. A sealing strip 510 is provided on one side of the guide sleeve 508. The guide sleeve 508 and the connecting rod 509 are connected by a spring. One end of the connecting rod 509 is fixed relative to the guide sleeve 508 by the spring, and the other end of the connecting rod 509 passes through the guide sleeve 508 and is inserted into the positioning plug 511. The sealing strip 510 can limit the movement of the connecting rod 509, facilitating automatic insertion of the connecting rod 509 under the support of the spring when the sealing strip 510 is separated from the second positioning frame 506.

[0040] The first splicing unit 501 and the second splicing unit 502 are symmetrically installed. The second positioning frame 506 has a socket on one side. The positioning plug 511 and the sealing strip 510 are respectively inserted into the inner side of both ends of the socket. The first positioning frame 505 and the second positioning frame 506 are in close contact. Two adjacent lifting connecting blocks 507 are symmetrically installed relative to the cross frame 504. Two adjacent splicing columns 503 are inserted into each other. The connecting rod 509 can automatically pass through the second positioning frame 506 and be inserted into the positioning plug 511 under the support of the spring provided inside the guide sleeve 508, thereby realizing the automatic splicing of the first splicing unit 501 and the second splicing unit 502 to form the frame mechanism 5.

[0041] Please see Figure 3 , Figure 5 and Figure 6The extended lifting mechanism 2 includes a hydraulic cylinder 201. The bottom end of the hydraulic cylinder 201 is fixedly connected to the support base 101. A transmission plate 202 is fixedly installed at the output end of the hydraulic cylinder 201. Four electric cylinders 204 are fixedly installed in the middle of the upper surface of the transmission plate 202. Lifting sliders 203 are fixedly installed at the output end of the electric cylinders 204. The output end of the hydraulic cylinder 201 and the four electric cylinders 204 are all fixedly connected through the transmission plate 202. The four lifting sliders 203 are arranged in a circle relative to the transmission plate 202. The four lifting sliders 203 are installed in a one-to-one correspondence with the lifting connecting block 507. The transmission plate 202 slides vertically back and forth along the axis of the hydraulic cylinder 201 on the inner side of the positioning support plate 102. The lifting sliders 203 can lift the splicing column 503 through the lifting connecting block 507 to realize the overall lifting operation of the frame mechanism 5.

[0042] Please see Figure 2 , Figure 8 and Figure 9 The upper end of the spliced ​​upright 3 is equipped with a steel space frame positioning mechanism 4. The steel space frame positioning mechanism 4 includes a connecting frame 401. The spliced ​​upright 503, the positioning support plate 102, and the connecting frame 401 are all inserted and installed. The upper end of the connecting frame 401 is fixedly installed with an installation groove plate 402. Multiple support slides 403 are slidably connected to the upper end surface of the installation groove plate 402. The multiple support slides 403 are linearly arranged along the axis of the installation groove plate 402. The installation groove plate 402 and the support slides 403 are connected and fixed by screws. A positioning seat 404 is fixedly installed in the middle of the upper end surface of each support slide 403. The upper end surface of the positioning seat 404 is provided with an arc groove, so that the multiple support slides 403 can provide multi-point synchronous support for the steel space frame through the arc groove provided on the upper end surface of the positioning seat 404, effectively improving the support stability of the steel space frame.

[0043] A method for using an integrated lifting device for an ultra-large area steel space frame includes the following steps:

[0044] S1: When lifting and lowering the large-area steel grid frame, the two material placement guide plates 103 and the feeding push plate 106 are symmetrically installed relative to the positioning support plate 102. The power is turned on, and the first splicing unit 501 and the second splicing unit 502 that form the frame mechanism 5 are placed symmetrically on the upper surface of the two material placement guide plates 103. The drive motor 104 is started, so that the drive motor 104 drives the two feeding push plates 106 to move towards each other through the drive screw 105 under the support of the material placement guide plate 103. Then, the feeding push plate 106 pushes the first splicing unit 501 and the second splicing unit 502 towards each other to the upper surface of the positioning support plate 102 under the guidance of the material placement guide plate 103. Then the feeding push plate 106 is reset.

[0045] S2: A socket is provided on one side of the second positioning frame 506. The sealing strip 510 is inserted into the inside of the socket. When the first splicing unit 501 and the second splicing unit 502 are spliced ​​together, the first positioning frame 505 drives the positioning plug 511 to be inserted into the inside of the socket and pushes out the sealing strip 510. At this time, the connecting rod 509 can automatically pass through the second positioning frame 506 and be inserted into the positioning plug 511 under the support of the spring provided inside the guide sleeve 508, thereby realizing the automatic splicing of the first splicing unit 501 and the second splicing unit 502 and forming the upright mechanism 5.

[0046] S3: At this time, the mounting slot plate 402 is inserted and installed into the upper end of the upright mechanism 5 through the connecting bracket 401. At the same time, the spacing of multiple support slides 403 is adjusted according to the support node position of the steel grid, so that multiple support slides 403 can provide multi-point synchronous support for the steel grid through the arc groove provided on the upper end surface of the positioning seat 404, effectively improving the support stability of the steel grid. The hydraulic cylinder 201 is started, so that the hydraulic cylinder 201, under the support of the support base 101, drives the lifting slider 203 and the electric cylinder 204 to move upward synchronously through the transmission plate 202.

[0047] S4: Under the support of the transmission plate 202, the electric cylinder 204 drives the lifting slider 203 to slide horizontally. Then, the lifting slider 203 can lift the splicing column 503 through the lifting connecting block 507 to realize the overall lifting operation of the frame mechanism 5. The upward movement distance of the frame mechanism 5 is greater than the length of the splicing column 503. After the frame mechanism 5 is lifted, the first splicing unit 501 and the second splicing unit 502 are fed again by the feeding push plate 106 and assembled to form another set of frame mechanisms 5.

[0048] S5: Then the lifting slider 203 is reset. At this time, the upper frame mechanism 5 falls under gravity and automatically connects with another set of frame mechanisms 5. Repeated assembly and lifting operations of the frame mechanism 5 facilitate the adjustment of the length of the spliced ​​frame 3, thereby achieving stable lifting of the steel grid frame.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A one-piece lifting device for a super-large area steel truss, comprising an expansion jacking mechanism (2) and a spliced stand (3), characterized in that: The extended lifting mechanism (2) is equipped with a support feeding mechanism (1) on its outer side. The upper end of the support feeding mechanism (1) is equipped with a splicing frame (3). The splicing frame (3) is formed by splicing multiple frame mechanisms (5) in sequence. The frame mechanism (5) is composed of a first splicing unit (501) and a second splicing unit (502). Both the first splicing unit (501) and the second splicing unit (502) include a cross frame (504). Both ends of the cross frame (504) are fixedly installed with splicing columns (503). A lifting connecting block (507) is fixedly installed on one side of the bottom of the splicing column (503). The first splicing unit (501) also includes a first positioning frame (505) fixedly connected to two of the splicing columns (503), and a plurality of positioning plugs (511) are fixedly provided at the end of the first positioning frame (505) away from the splicing column (503). The second splicing unit (502) also includes a second positioning frame (506) fixedly connected to two other splicing columns (503). A plurality of guide sleeves (508) are fixedly installed at the end of the second positioning frame (506) away from the splicing column (503). A connecting rod (509) is slidably connected to the inner side of the guide sleeve (508). A sealing strip (510) is provided on one side of the guide sleeve (508). The supporting feeding mechanism (1) includes a supporting base (101), a positioning support plate (102) is fixedly installed on the upper end of the supporting base (101), and a material placement guide plate (103) is fixedly installed on both sides of the positioning support plate (102). A feeding push plate (106) is slidably connected to the upper end surface of the material placement guide plate (103). A drive motor (104) is fixedly installed at one end of one of the material placement guide plates (103), and a drive screw (105) and a guide rod (107) arranged in parallel are installed between the bottom ends of the two material placement guide plates (103). The extended lifting mechanism (2) includes a hydraulic cylinder (201), a transmission plate (202) is fixedly installed at the output end of the hydraulic cylinder (201), four electric cylinders (204) are fixedly installed in the middle of the upper surface of the transmission plate (202), and a lifting slider (203) is fixedly installed at the output end of the electric cylinder (204).

2. The integrated lifting device for a super-large area steel truss according to claim 1, characterized in that: The upper end of the splicing frame (3) is equipped with a steel grid positioning mechanism (4). The steel grid positioning mechanism (4) includes a connecting frame (401). The upper end of the connecting frame (401) is fixedly equipped with an installation groove plate (402). Multiple support slides (403) are slidably connected to the upper end surface of the installation groove plate (402). A positioning seat (404) is fixedly installed in the middle of the upper end surface of each support slide (403).

3. The integrated lifting device for a super-large area steel truss according to claim 2, characterized in that: The first splicing unit (501) and the second splicing unit (502) are installed symmetrically. The second positioning frame (506) has a socket on one side. The positioning plug (511) and the sealing strip (510) are respectively inserted into the inner side of both ends of the socket. The first positioning frame (505) and the second positioning frame (506) are in close contact. The guide sleeve (508) and the connecting rod (509) are connected by a spring. One end of the connecting rod (509) is fixed relative to the guide sleeve (508) by the spring. The other end of the connecting rod (509) passes through the guide sleeve (508) and is inserted into the positioning plug (511).

4. The integrated lifting device for a super-large area steel truss according to claim 3, characterized in that: The two adjacent lifting connecting blocks (507) are symmetrically installed relative to the cross frame (504), and the four lifting sliders (203) are arranged in a circle relative to the transmission plate (202). The four lifting sliders (203) are installed in a one-to-one correspondence with the lifting connecting blocks (507). The two adjacent splicing columns (503) are interlocked with each other. The splicing columns (503) are interlocked with the positioning support plate (102) and the connecting frame (401).

5. The integrated lifting device for a super-large area steel truss according to claim 4, characterized in that: The two material placement guide plates (103) and the feeding push plate (106) are symmetrically installed relative to the positioning support plate (102). The bottom end of the feeding push plate (106) passes through the material placement guide plate (103) and is sleeved on the outside of the transmission screw (105) and the guide rod (107). The feeding push plate (106) is slidably connected to the guide rod (107). The output end of the transmission motor (104) is connected to the transmission screw (105) through a coupling. The two ends of the transmission screw (105) are provided with external threads with opposite directions of rotation. The two ends of the transmission screw (105) are threadedly connected to the two feeding push plates (106). The two feeding push plates (106) slide back and forth in opposite directions along the axis of the transmission screw (105).

6. The integrated lifting device for an ultra-large area steel grid frame according to claim 5, characterized in that: The bottom end of the hydraulic cylinder (201) is fixedly connected to the support base (101). The output end of the hydraulic cylinder (201) is fixedly connected to the four electric cylinders (204) through the transmission plate (202). The transmission plate (202) slides vertically along the axis of the hydraulic cylinder (201) on the inner side of the positioning support plate (102).

7. The integrated lifting device for an ultra-large area steel grid frame according to claim 6, characterized in that: Multiple support slides (403) are arranged linearly along the axis of the mounting groove plate (402). The mounting groove plate (402) and the support slides (403) are connected and fixed by screws. The upper end face of the positioning seat (404) is provided with an arc groove.

8. The method of using the integrated lifting device for an ultra-large area steel grid frame according to claim 7, characterized in that, Includes the following steps: S1: When lifting and lowering the large-area steel grid frame, the two material placement guide plates (103) and the loading push plate (106) are symmetrically installed relative to the positioning support plate (102). The power is turned on, and the first splicing unit (501) and the second splicing unit (502) of the frame mechanism (5) are placed symmetrically on the upper surface of the two material placement guide plates (103). The drive motor (104) is started, so that the drive motor (104) drives the two loading push plates (106) to move towards each other through the drive screw (105) under the support of the material placement guide plate (103). Then, the loading push plate (106) pushes the first splicing unit (501) and the second splicing unit (502) towards each other to the upper surface of the positioning support plate (102) under the guidance of the material placement guide plate (103). Then the loading push plate (106) is reset. S2: A socket is provided on one side of the second positioning frame (506). The sealing strip (510) is inserted into the inner side of the socket. When the first splicing unit (501) and the second splicing unit (502) are spliced ​​together, the first positioning frame (505) drives the positioning plug (511) to be inserted into the inner side of the socket and pushes out the sealing strip (510). At this time, the connecting rod (509) can automatically pass through the second positioning frame (506) and be inserted into the positioning plug (511) under the support of the spring provided inside the guide sleeve (508), thereby realizing the automatic splicing of the first splicing unit (501) and the second splicing unit (502) and forming the frame mechanism (5). S3: At this time, the mounting plate (402) is installed by inserting it into the upper end of the frame mechanism (5) through the connecting frame (401). At the same time, the spacing of multiple support slides (403) is adjusted according to the support node position of the steel grid, so that multiple support slides (403) can provide multi-point synchronous support for the steel grid through the arc groove provided on the upper surface of the positioning seat (404), effectively improving the support stability of the steel grid. The hydraulic cylinder (201) is started, so that the hydraulic cylinder (201) drives the lifting slider (203) and electric cylinder (204) to move upward synchronously through the transmission plate (202) under the support of the support base (101). S4: Under the support of the transmission plate (202), the electric cylinder (204) drives the lifting slider (203) to slide horizontally. Then, the lifting slider (203) can lift the splicing column (503) through the lifting connecting block (507) to realize the overall lifting operation of the frame mechanism (5). The upward movement distance of the frame mechanism (5) is greater than the length of the splicing column (503). After the frame mechanism (5) is lifted, the first splicing unit (501) and the second splicing unit (502) are fed again by the feeding push plate (106) and assembled to form another set of frame mechanisms (5). S5: Then the lifting slider (203) is reset. At this time, the upper frame mechanism (5) is subjected to gravity and falls down and automatically connects with another set of frame mechanisms (5). Repeated assembly and lifting operations of the frame mechanism (5) facilitate the adjustment of the length of the spliced ​​frame (3), thereby achieving stable lifting of the steel grid frame.

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