Climbing mechanism of nuclear island BRX factory building inner and outer shell building machine

Abstract

The utility model discloses a nuclear island BRX factory building inner and outer shell building machine jacking mechanism, and relates to the technical field of building machine jacking. The safety shell outer wall structure comprises a top steel platform, an inner side frame body and an outer side frame body which form an inverted U-shaped structure, and the built safety shell outer wall structure is located between the inner side frame body and the outer side frame body; the jacking mechanism comprises a suspension shoe, a climbing guide rail vertically hung on the suspension shoe, a climbing frame head matched with the suspension shoe, an upper elevator connected to the lower portion of the climbing frame head on the upper portion, and a lower elevator connected with the side wall of the climbing guide rail. The two ends of the jacking oil cylinder are connected with the upper hoister and the lower hoister respectively. According to the utility model, synchronous jacking construction of the inner side and the outer side of the nuclear island BRX factory building containment can be realized; the construction efficiency and stability are high, the construction requirements of the large-size and large-height nuclear island BRX factory building are met, and compared with a traditional scaffold and a single-side building machine, the efficiency is higher, and the speed is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of the jacking of construction machines, and particularly relates to a jacking mechanism for the inner and outer shells of a nuclear island BRX plant building Background Technique

[0002] According to the process requirements, the nuclear island buildings of a power plant are generally divided into a reactor building (BRX), a nuclear fuel building (BFX), a safety building (BSX), a reactor gantry building (BRP), a nuclear auxiliary building (BNX), a radioactive waste treatment building (BWX), an access building (BAX), an additional cooling water and nuclear island fire water building (BEJ), a diesel generator building (BDX), etc. Especially for the reactor building (BRX), its concrete design strength grade and durability are particularly high.

[0003] The reactor building (BRX), or the nuclear island BRX building, has a specific shape with a cylindrical outer shell on the periphery and a cover roof on the top. During construction, the cylindrical outer shell is constructed first, and then the cover roof is constructed. Since the nuclear island BRX building is huge in volume and has relatively high requirements for the strength of the outer shell; if the traditional scaffolding method is used for construction, the construction speed is slow, the built frame is large in size, and it is not convenient for actual operation; while the building construction machine is currently widely used in the field of high-rise building construction. If the structural characteristics of the building construction machine can be combined and applied to the construction scenario of the inner and outer shells of the nuclear island BRX building, the construction efficiency of the nuclear island BRX building will be greatly improved; therefore, the present technical solution proposes a jacking mechanism for the inner and outer shells of a nuclear island BRX plant building. Content of the Utility Model

[0004] The utility model provides a jacking mechanism for the inner and outer shells of a nuclear island BRX plant building. The jacking mechanism of the construction machine is composed of a top steel platform, an inner frame body and an outer frame body located below the top steel platform, forming an inverted "U" shape structure, so that the safety shell outer wall structure to be constructed is located between the inner frame body and the outer frame body, and can realize the synchronous jacking construction of the inner and outer sides of the safety shell of the nuclear island BRX building; the inner frame body and the outer frame body are symmetrically arranged, and the jacking components include suspension boots, climbing guide rails, climbing frame heads, upper hoisting machines, lower hoisting machines, jacking oil cylinders and climbing formwork frame body adjusting devices. Through the cooperation of each component, a stable and synchronous inner and outer jacking action can be realized, the construction efficiency and stability are high, and it meets the construction requirements of the nuclear island BRX building with large volume and high height. Compared with the traditional scaffolding and single-sided building construction machine, the efficiency is higher and the speed is faster; thus, the problems in the background technique are solved.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] A jacking mechanism for the inner and outer shells of the nuclear island BRX plant building of the present utility model is used for jacking during the construction of the containment outer wall of the nuclear island BRX plant building. It includes a top steel platform connected to the bottom of the suspension arm, an inner frame body and an outer frame body installed at the bottom of the top steel platform. The three form an inverted "U" - shaped structure, and the constructed containment outer wall structure is located between the inner frame body and the outer frame body;

[0007] The inner frame body includes an inner upper frame body and an inner lower frame body that are fixedly connected; the outer frame body includes an outer upper frame body and an outer lower frame body that are fixedly connected; jacking mechanisms are symmetrically installed on the opposite sides of the inner lower frame body and the outer lower frame body;

[0008] The jacking mechanism includes a suspension boot installed on the side wall of the containment outer wall structure that has reached the structural strength through embedded parts, a climbing guide rail vertically hung on the suspension boot, a climbing frame head matched with the suspension boot, an upper hoist connected to the lower part of the upper climbing frame head, a lower hoist connected to the side wall of the climbing guide rail, a jacking oil cylinder with both ends respectively connected to the upper hoist and the lower hoist, and a climbing formwork frame body adjusting device.

[0009] Further, the climbing frame head is of a concave - shaped structure. The climbing frame head and the suspension boot are connected by a load - bearing pin. Guide rail limit rollers that abut against the side scraping plates of the climbing guide rail are relatively installed on both sides of the climbing frame head; at the bottom of the front sides of the two side plates, there are load - bearing pin card slots that are engaged with the load - bearing pins installed on the suspension boot; at the rear side of the main body of the climbing frame head, there is a U - shaped connecting plate that is clamped and matched with the side connecting block of the inner lower frame body or the outer lower frame body. The U - shaped connecting plate and the connecting block are fixedly connected by a pin shaft; at the bottom of the main body of the climbing frame head, there is a connecting seat that is connected to the top of the upper hoist through a connecting shaft.

[0010] Further, the load - bearing pin card slot has an opening facing downwards and is a U - shaped opening; the upper parts of the two side plates of the main body of the climbing frame head abut against the safety pins horizontally installed on the suspension boot.

[0011] Further, the upper hoist includes a mouth - shaped lifting frame body, positioning plates arranged symmetrically left and right at the upper and lower ends of the lifting frame body, two groups of opening limit slots symmetrically arranged left and right and engaged with the side part of the climbing guide rail. The opening limit slots are vertically surrounded by three limit plates and the openings of the two opening limit slots are arranged oppositely. At the rear side of the opening limit slots, there are limit rollers that guide the climbing guide rail; two mounting plates are vertically arranged in the lifting frame body. Between the two mounting plates, a tongue - shaped load - bearing tongue block corresponding to the positioning holes on the surface of the climbing guide rail is rotatably installed through a reversing pin shaft. At one end of the reversing pin shaft, there is a reversing shaft sleeve. The reversing shaft sleeve is connected to a support on the bottom wall of the lifting frame body through a bolt and a tension spring; a connecting support is arranged at the bottom of the lifting frame body.

[0012] Furthermore, the lower hoist has the same structure as the upper hoist and is arranged in central symmetry up and down; the connecting supports of the upper hoist and the lower hoist are respectively hinged to the top and bottom of the jacking oil cylinder; a pin shaft seat is provided at the bottom of the lower hoist, and the pin shaft seat and the suspension boot are hinged to each other through a connecting pin shaft.

[0013] Furthermore, the two groups of the opening limit grooves are vertically arranged between the upper and lower positioning plates on the left side and between the upper and lower positioning plates on the right side.

[0014] Furthermore, both ends of the limit plate are provided with an outward-expanding structure for facilitating guiding.

[0015] Furthermore, the climbing formwork adjusting device is installed on the inner lower formwork or the outer lower formwork close to one side of the climbing guide rail through a connecting piece;

[0016] The climbing formwork adjusting device includes a support leg body in a concave shape, adjusting screw rods threadedly installed in the threaded holes on both sides of the support leg body, a support plate arranged at the front end of the adjusting screw rod, and a rotating adjusting block with a through hole arranged at the rear end of the adjusting screw rod; a mud guard with an inverted U-shaped cross section is detachably installed on the upper part of the adjusting screw rod.

[0017] Furthermore, the mud guard includes a first mud guard and a second mud guard; the first mud guard is fixedly installed on the front side of the support leg body through a first bolt, and the second mud guard is fixedly installed on the side part of the connecting block on the rear side of the support plate through a second bolt; the second mud guard and the first mud guard are arranged in a sleeved manner, and the second mud guard moves back and forth following the support plate.

[0018] Furthermore, a first connecting plate is arranged at the rear side of the support leg body and is fixedly connected to the connecting piece through a third bolt.

[0019] The utility model has the following beneficial effects compared with the prior art:

[0020] (1) The jacking mechanism of the construction crane is composed of a top steel platform, an inner formwork and an outer formwork located below the top steel platform, forming an inverted "U" shape structure, so that the safety shell outer wall structure of the construction is located between the inner formwork and the outer formwork, and the synchronous jacking construction of the inner and outer sides of the safety shell of the nuclear island BRX plant can be realized;

[0021] (2) The inner frame and the outer frame are symmetrically arranged, and the jacking component includes a suspension boot, a climbing guide rail, a climbing frame head, an upper hoist, a lower hoist, a jacking oil cylinder, and a climbing formwork frame adjusting device. Through the cooperation of each component, a stable and synchronous internal and external jacking action can be achieved, with high construction efficiency and stability, meeting the construction requirements of the large-volume and high-height nuclear island BRX plant. Compared with traditional scaffolding and single-sided building machines, the efficiency is higher and the speed is faster;

[0022] (3) Since the top of the inner frame and the outer frame is also provided with a top steel platform connected to the bottom of the suspension arm, and the climbing formwork frame adjusting device is provided on the side of the inner frame and the outer frame, the safety and stability of the overall structural framework can be ensured.

[0023] Of course, it is not necessary for any product implementing the present utility model to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of a jacking mechanism for the inner and outer shells of a nuclear island BRX plant of the present utility model;

[0026] Figure 2 It is Figure 1 a structural top view;

[0027] Figure 3 It is Figure 1 a structural side view;

[0028] Figure 4 It is a schematic structural diagram of a specific application scenario of a jacking mechanism for the inner and outer shells of a nuclear island BRX plant of the present utility model based on the safety shell outer wall structure;

[0029] Figure 5 It is Figure 4 a partial enlarged view of position A in

[0030] Figure 6 a schematic structural diagram of a climbing frame head;

[0031] Figure 7 It is Figure 6 a schematic structural diagram of the B perspective in

[0032] Figure 8It is a structural and connection relationship diagram of a jacking oil cylinder, an upper hoist, and a lower hoist;

[0033] Figure 9 It is Figure 8 a schematic structural diagram of the upper-middle hoist;

[0034] Figure 10 It is Figure 9 the front view of the structure;

[0035] Figure 11 It is Figure 9 the side view of the structure;

[0036] Figure 12 It is Figure 9 the top view of the structure;

[0037] Figure 13 It is a schematic structural diagram of the climbing formwork frame adjusting device;

[0038] Figure 14 It is Figure 13 a schematic structural diagram from view C in;

[0039] Figure 15 It is Figure 4 a partial enlarged view at position D in;

[0040] Figure 16 It is a schematic structural diagram of a connecting piece;

[0041] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0042] 1 - Top steel platform, 2 - Inner upper frame, 21 - Inner lower frame, 3 - Outer upper frame, 31 - Outer lower frame, 4 - Climbing guide rail, 41 - Embedded part, 42 - Embedded part, 421 - Safety pin, 422 - Load-bearing pin, 423 - Pin shaft, 43 - Climbing frame head, 431 - U-shaped connecting plate, 432 - Guide rail limit roller, 433 - Connecting seat, 434 - Load-bearing pin slot, 44 - Jacking oil cylinder, 45 - Upper hoist, 451 - Hoisting frame body, 452 - Mounting plate, 453 - Limiting plate, 454 - Reversing pin shaft, 455 - Tension spring, 456 - Reversing bushing, 457 - Connecting support, 458 - Load-bearing tongue block, 459 - Positioning plate, 46 - Lower hoist, 47 - Climbing formwork frame adjusting device, 471 - Support leg main body, 472 - First connecting plate, 473 - Mudguard, 474 - Adjusting screw rod, 475 - Rotary adjusting block, 476 - Connecting block, 477 - Support plate, 478 - Limiting roller, 479 - Connecting piece, 5 - Safety shell exterior wall structure. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0044] In the description of the present utility model, it should be understood that the terms "top", "bottom", "inner side", "outer side", "upper part", "lower part", etc. indicating the orientation or position relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0045] Please refer to Figure 1-16 As shown in the figure, a jacking mechanism for the inner and outer shells of the nuclear island BRX plant building of the present utility model is used for jacking during the construction of the containment outer wall of the nuclear island BRX plant building, and includes a top steel platform 1 connected to the bottom of the suspension arm, an inner frame body and an outer frame body installed at the bottom of the top steel platform 1. The three form an inverted "U" - shaped structure, and the constructed containment outer wall structure 5 is located between the inner frame body and the outer frame body;

[0046] The inner frame body includes an inner upper frame body 2 and an inner lower frame body 21 that are fixedly connected; the outer frame body includes an outer upper frame body 3 and an outer lower frame body 31 that are fixedly connected; jacking mechanisms are symmetrically installed on the opposite sides of the inner lower frame body 21 and the outer lower frame body 31;

[0047] The jacking mechanism includes a suspension boot 42 installed on the side wall of the containment outer wall structure 5 that has reached the structural strength through a buried part 41, a climbing guide rail 4 vertically hung on the suspension boot 42, a climbing frame head 43 that cooperates with the suspension boot 42, an upper hoist 45 connected to the lower part of the upper climbing frame head 43, a lower hoist 46 connected to the side wall of the climbing guide rail 4, a jacking oil cylinder 44 with both ends respectively connected to the upper hoist 45 and the lower hoist 46, and a climbing formwork frame body adjusting device 47.

[0048] Among them, the climbing frame head 43 has a concave structure. The climbing frame head 43 is connected to the suspension boot 42 through a load-bearing pin 422. Guide rail limit rollers 432 that abut against the side scrapers of the climbing guide rail 4 are relatively installed on both sides of the climbing frame head 43; at the bottom of the front sides of the two side plates, there are load-bearing pin card slots 434 that are engaged with the load-bearing pins 422 installed on the suspension boot 42; at the rear side of the main body of the climbing frame head 43, there is a U-shaped connecting plate 431 that is clamped and matched with the side connecting blocks of the inner lower frame body 21 or the outer lower frame body 31. The U-shaped connecting plate 431 and the connecting block are fixedly connected through a pin shaft 423; at the bottom of the main body of the climbing frame head 43, there is a connecting seat 433 that is connected to the top of the upper hoist 45 through a connecting shaft.

[0049] Among them, the opening of the load-bearing pin card slot 434 faces downward and is a U-shaped opening; the upper parts of the two side plates of the main body of the climbing frame head 43 abut against the safety pins 421 horizontally installed on the suspension boot 42.

[0050] The jacking of the inner frame body or the outer frame body is that the jacking system jacks up the climbing frame head 43 to drive the inner frame body or the outer frame body to move upward together. There is a connecting seat 433 at the lower end of the climbing frame head 43. The climbing frame head 4 and the upper hoist 45 are connected by a pin shaft; four guide rail limit rollers 432 are arranged inside the climbing frame head 4, and together with the guide rail limit plate in the suspension boot 42, they play a role in limiting and guiding the climbing guide rail 4. The connection device between the climbing frame and the suspension boot designed in this technical solution has high strength, light weight, convenient installation, large bearing capacity, good reliability, and greatly increases the safety during the construction process.

[0051] Among them, the upper hoist 45 includes a mouth-shaped lifting frame body 451, positioning plates 459 arranged symmetrically left and right at the upper and lower ends of the lifting frame body 451, two groups of opening limit slots symmetrically arranged left and right and engaged with the side parts of the climbing guide rail 4. The opening limit slots are formed by three vertical limit plates 453 surrounding them, and the openings of the two opening limit slots are arranged oppositely. At the rear side of the opening limit slots, there are limit rollers 478 that play a guiding role for the climbing guide rail 4; two mounting plates 452 are vertically arranged inside the lifting frame body 451. Between the two mounting plates 452, a tongue-shaped load-bearing tongue block 458 corresponding to the positioning holes on the surface of the climbing guide rail 4 is rotatably installed through a reversing pin shaft 454. At one end of the reversing pin shaft 454, there is a reversing bushing 456. A tension spring 455 is connected between the reversing bushing 456 and the support on the bottom wall of the lifting frame body 451 through a bolt; a connecting support 457 is arranged at the bottom of the lifting frame body 451.

[0052] Among them, the lower hoist 46 has the same structure as the upper hoist 45, and they are arranged symmetrically about the center up and down; the connecting supports 457 of the upper hoist 45 and the lower hoist 46 are respectively hinged to the top and bottom of the jacking oil cylinder 44; a pin shaft seat is provided at the bottom of the lower hoist 46, and the pin shaft seat is hinged to the suspension shoe 42 through a connecting pin shaft.

[0053] Among them, two groups of opening limit grooves are vertically arranged between the upper and lower positioning plates 459 on the left side and between the upper and lower positioning plates 459 on the right side.

[0054] Among them, both ends of the limit plate 453 are provided with an outward-expanded structure for facilitating guiding.

[0055] Among them, the climbing formwork frame adjusting device 47 is installed on one side of the inner lower frame 21 or the outer lower frame 31 close to the climbing guide rail 4 through a connecting piece 479;

[0056] The lower end of the upper hoist 45 has a support connected to the jacking oil cylinder 44, which is connected to the jacking oil cylinder 44 with a pin shaft. The upper end of the lower hoist 46 has a support connected to the jacking oil cylinder 44, which is connected to the jacking oil cylinder 44 with a pin shaft, and the lower end has a support connected to the suspension shoe 42, which is connected to the suspension shoe 42 with a pin shaft. The load-bearing tongue block 458 of the hoist is connected to the upper or lower frame with a reversing pin shaft 454. The reversing pin shaft 454 and the reversing bushing 456 are connected with bolts. One end of the tension spring 455 is connected to the bolt on the reversing bushing 456, and the other end is connected to the support on the hoist frame. The tension spring 455 ensures that the load-bearing tongue block 458 does not deflect when the load-bearing tongue block 458 abuts against the climbing guide rail 4. The climbing guide rail 4 or the hoist is supported by changing the direction of the load-bearing tongue block 458 of the hoist. The main material of the hoist frame is welded by BS700 high-strength structural steel, which has the characteristics of high strength and light weight. The load-bearing tongue material of the hoist adopts 3Cr2Mo die steel, which has good comprehensive mechanical properties and high hardenability, and can make steel with a larger cross-section obtain relatively uniform hardness, and can bear a maximum weight of 50T.

[0057] The direction of the load-bearing tongue in the hoist is changed by the reversing shaft in the hoist to realize the functional conversion of the lifting guide rail and the lifting cylinder. When the guide rail needs to be lifted, turn the handle on the reversing shaft so that the load-bearing blocks in the upper and lower hoists are aligned to push up against the guide rail, and the load-bearing tongue is against the upper end of the guide rail ladder. Then operate the valve switch and start the hydraulic system, and the guide rail can climb step by step according to the cylinder stroke. After the climbing is completed, the load-bearing tongue of the hanging shoe is used to press against the upper end of the guide rail ladder to ensure that the guide rail does not fall. When the hoist and the cylinder need to be lifted, turn the handle on the reversing shaft so that the load-bearing tongue in the upper and lower hoists press against the lower end of the guide rail ladder, operate the valve switch, start the hydraulic system, the cylinder extends to lift the upper hoist, and the load-bearing tongue of the upper hoist presses against the lower end of the guide rail ladder to complete the lifting of the upper hoist. Then remove the connecting pin shaft between the lower hoist and the suspension shoe, start the hydraulic system, shrink the oil cylinder, lift the lower hoist, and the lower hoist bearing tongue presses against the lower end of the guide rail ladder to complete the lifting of the lower hoist. Repeat this action to the next construction position.

[0058] The climbing formwork frame adjustment device 47 includes a concave-shaped supporting leg body 471, an adjusting screw rod 474 threadedly installed in the threaded holes on both sides of the supporting leg body 471, a supporting plate 477 arranged at the front end of the adjusting screw rod 474, and a rotating adjustment block 475 with a through hole arranged at the rear end of the adjusting screw rod 474; a mudguard 473 with an inverted U-shaped cross-section is detachably installed on the upper part of the adjusting screw rod 474.

[0059] Among them, the fender 473 includes a first fender and a second fender; the first fender is fixedly installed on the front side of the support leg body 471 by a first bolt, and the second fender is fixedly installed on the side of the connecting block 476 on the rear side of the support plate 477 by a second bolt; the second fender is arranged in a sleeve arrangement with the first fender, and the second fender moves forward and backward with the support plate 477.

[0060] Among them, a first connecting plate 472 is provided on the rear side of the supporting leg body 471 and is fixedly connected to the connecting member 479 by a third bolt.

[0061] During structural construction, the frame support leg adjustment screw 474 is pressed against the concrete structure surface to keep the frame parallel to the concrete structure surface, which can effectively ensure the stability of the climbing formwork frame. When the climbing formwork frame needs to be lifted, the adjustment screw 474 is turned to separate the leg plate from the concrete structure surface. After the lifting is completed, the adjustment screw is turned to press the support plate against the concrete structure surface and keep the frame parallel to the structure surface.

[0062] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present utility model, so that those skilled in the relevant technical field can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A lifting mechanism for the inner and outer shell construction machine of a nuclear island BRX plant, used for lifting the outer wall of the containment shell of a nuclear island BRX plant during construction, characterized in that: It includes a top steel platform (1) connected to the bottom of the suspension arm, an inner frame body and an outer frame body installed at the bottom of the top steel platform (1). The three form an inverted "U" - shaped structure, and the constructed containment wall structure (5) is located between the inner frame body and the outer frame body; The inner frame body includes an inner upper frame body (2) and an inner lower frame body (21) fixedly connected; the outer frame body includes an outer upper frame body (3) and an outer lower frame body (31) fixedly connected; jacking mechanisms are symmetrically installed on the opposite sides of the inner lower frame body (21) and the outer lower frame body (31); The jacking mechanism includes a suspension boot (42) installed on the side wall of the containment wall structure (5) that has reached the structural strength through a pre - embedded part (41), a climbing guide rail (4) vertically hung on the suspension boot (42), a climbing frame head (43) cooperating with the suspension boot (42), an upper hoist (45) connected to the lower part of the upper climbing frame head (43), a lower hoist (46) connected to the side wall of the climbing guide rail (4), a jacking oil cylinder (44) with both ends respectively connected to the upper hoist (45) and the lower hoist (46), and a climbing formwork frame body adjusting device (47).

2. A lifting mechanism for the inner and outer shell construction machine of a nuclear island BRX plant according to claim 1, characterized in that: The climbing frame head (43) is of a concave - shaped structure. The climbing frame head (43) is connected to the suspension boot (42) through a load - bearing pin (422). Guide rail limit rollers (432) that abut against the side scrapers of the climbing guide rail (4) are relatively installed on both sides of the climbing frame head (43); load - bearing pin clamping grooves (434) that are engaged with the load - bearing pins (422) installed on the suspension boot (42) are arranged at the bottom in front of both side plates; a U - shaped connecting plate (431) that is clamped and matched with the side connecting block of the inner lower frame body (21) or the outer lower frame body (31) is installed at the rear side of the main body of the climbing frame head (43). The U - shaped connecting plate (431) and the connecting block are fixedly connected through a pin shaft (423); a connecting seat (433) that is connected to the top of the upper hoist (45) through a connecting shaft is arranged at the bottom of the main body of the climbing frame head (43).

3. A lifting mechanism for the inner and outer shell construction machine of a nuclear island BRX plant according to claim 2, characterized in that: The load - bearing pin clamping groove (434) has an opening facing downwards and is a U - shaped opening; the upper parts of both side plates of the main body of the climbing frame head (43) abut against the safety pins (421) horizontally installed on the suspension boot (42).

4. A lifting mechanism for the inner and outer shell construction machine of a nuclear island BRX plant according to claim 1, characterized in that: The upper hoist (45) comprises a U-shaped lifting frame body (451), positioning plates (459) arranged at the upper and lower ends of the lifting frame body (451) and arranged symmetrically on the left and right, and two groups of open limiting grooves arranged symmetrically on the left and right and engaged with the side of the climbing guide rail (4), the open limiting groove is formed by three limiting plates (453) vertically surrounding and the openings of the two open limiting grooves are arranged opposite to each other, and a limiting roller (478) is installed at the rear side of the open limiting groove to guide the climbing guide rail (4); the lifting frame body (4 51) are vertically arranged with two mounting plates (452), and a tongue-shaped load-bearing tongue block (458) corresponding to the positioning hole on the surface of the climbing guide rail (4) is rotatably installed between the two mounting plates (452) through a reversing pin shaft (454), and a reversing shaft sleeve (456) is installed at one end of the reversing pin shaft (454), and the reversing shaft sleeve (456) is connected to a tension spring (455) on a support between the bottom wall of the lifting frame body (451) through bolts; a connecting support (457) is arranged at the bottom of the lifting frame body (451).

5. The lifting mechanism of the inner and outer shell construction machine of the nuclear island BRX plant according to claim 1 is characterized in that: The lower hoist (46) has the same structure as the upper hoist (45) and is arranged symmetrically from top to bottom; the connecting support (457) of the upper hoist (45) and the lower hoist (46) is respectively hingedly connected to the top and bottom of the jacking cylinder (44); a pin shaft seat is provided at the bottom of the lower hoist (46), and the pin shaft seat is hingedly connected to the suspension shoe (42) via a connecting pin shaft.

6. A lifting mechanism for the inner and outer shell construction machine of a nuclear island BRX plant according to claim 4, characterized in that: The two groups of opening limit grooves are vertically arranged between the upper and lower positioning plates (459) on the left side and between the upper and lower positioning plates (459) on the right side.

7. A lifting mechanism for the inner and outer shell construction machine of a nuclear island BRX plant according to claim 4, characterized in that: Both ends of the limiting plate (453) are arranged as outwardly expanded structures for facilitating guidance.

8. The lifting mechanism of the inner and outer shell construction machine of the nuclear island BRX plant according to claim 1 is characterized in that: The climbing formwork frame adjusting device (47) is installed on a side of the inner lower frame (21) or the outer lower frame (31) close to the climbing guide rail (4) through a connecting piece (479); The climbing formwork frame adjustment device (47) comprises a concave-shaped support leg body (471), an adjustment screw (474) threadedly mounted in threaded holes on both sides of the support leg body (471), a support plate (477) arranged at the front end of the adjustment screw (474), and a rotary adjustment block (475) with a through hole arranged at the rear end of the adjustment screw (474); a mudguard (473) with an inverted U-shaped cross section is detachably mounted on the upper part of the adjustment screw (474).

9. A lifting mechanism for the inner and outer shell construction machine of a nuclear island BRX plant according to claim 8, characterized in that: The mudguard (473) comprises a first mudguard and a second mudguard; the first mudguard is fixedly mounted on the front side of the supporting leg body (471) by a first bolt, and the second mudguard is fixedly mounted on the side of the connecting block (476) at the rear side of the supporting plate (477) by a second bolt; the second mudguard is sleeved with the first mudguard, and the second mudguard moves forward and backward following the supporting plate (477).

10. The lifting mechanism of the inner and outer shell construction machine of the nuclear island BRX plant according to claim 8 is characterized in that: A first connecting plate (472) is provided on the rear side of the supporting leg body (471) and is fixedly connected to the connecting member (479) via a third bolt.

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