Temporary dumping and resetting device and method for ring door frame of nuclear power plant
Patent Information
- Application Number
- CN202610954632.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-30
- Publication Date
- 2026-10-16
AI Technical Summary
[0003]常规环吊门架多采用固定式竖立安装结构，门架处于竖直工作状态时的顶部标高通常超出穹顶吊装所要求的高度限值，无法直接满足穹顶吊装的作业条件
（1）本发明无需对环吊门架进行整体拆解与二次吊装，可大幅缩减施工周期，减少大型起重设备与高空作业的投入，显著降低现场施工的安全风险；同时整体结构改动幅度小，仅需依托原有环吊结构增设铰接构件、伸缩组件与牵拉部件即可实现功能，无需对环吊主体进行重新设计，能够有效控制改造成本，同时兼顾施工效率、作业安全性与工程经济性；
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Figure CN122915935A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of nuclear power plant ring gantry, and particularly relates to a temporary tilting and resetting device and method for nuclear power plant ring gantry. Background Technology
[0002] During the construction of the nuclear island building of a nuclear power plant, the dome hoisting is a core and landmark process connecting the civil construction and equipment installation phases. The construction progress and positioning accuracy directly affect the overall construction cycle and project quality of the nuclear power plant. The gantry crane, as the core lifting equipment within the nuclear island building, undertakes key functions such as hoisting the main reactor equipment and routine maintenance. The gantry structure is a crucial load-bearing component of the gantry crane, directly determining its lifting performance and operational stability. Due to the constraints of the hoisting equipment's lifting capacity and the dome positioning process, strict limits are set on the top elevation of all components within the building during the dome hoisting operation to ensure the dome can be successfully lowered to its designated installation position.
[0003] Conventional ring-type gantry cranes typically employ a fixed, vertical installation structure. When the gantry is in its vertical working state, its top elevation usually exceeds the height limit required for dome hoisting, thus failing to directly meet the operational conditions for dome hoisting. Current industry solutions generally address this issue by either completely dismantling the gantry and then re-hoisting it, or by significantly modifying the gantry structure. These solutions not only require substantial investment in lifting equipment and manpower, resulting in long construction periods and high modification costs, but also involve extensive high-altitude dismantling and assembly work, significantly increasing on-site construction safety risks. Furthermore, repeated dismantling and assembly operations can easily damage the connection accuracy and structural strength of the gantry, making it difficult to simultaneously achieve construction efficiency, operational safety, and structural reliability. Therefore, there is an urgent need for a temporary tilting and repositioning device and method for nuclear power plant ring-type gantry cranes. Summary of the Invention
[0004] To address some or all of the technical problems existing in the prior art, the present invention provides a temporary tilting and resetting device and method for a nuclear power plant ring gantry.
[0005] In one aspect of the invention, a temporary tilting and resetting device for a nuclear power plant ring crane gantry is provided. The temporary tilting and resetting device is disposed above the main ring beam of the ring crane gantry, characterized in that it includes a base spaced apart above the main ring beam, a ring crane gantry hinged to the base via a rotating shaft, and two telescopic components disposed between one side of the ring crane gantry and the main ring beam, wherein: The ring-type gantry includes gantry legs respectively set above the base and a gantry beam set between the tops of the two gantry legs. Two first lifting lugs are symmetrically arranged on both sides of the gantry beam. One end of the bottom of the gantry leg is hinged to one side of the base through a rotating shaft, and the other end is connected to the base through a locking assembly. Multiple second lifting lugs are spaced apart on the top of the main beam of the ring crane. The multiple second lifting lugs are symmetrically distributed on both sides of the ring crane gantry. The positions of the second lifting lugs match the positions of the first lifting lugs. A wire rope and a hand-operated hoist connect the first and second lifting lugs.
[0006] Furthermore, in the temporary tilting and resetting device of the aforementioned nuclear power plant ring crane gantry, the telescopic assembly contains a hydraulic cylinder.
[0007] Furthermore, in the aforementioned temporary tilting and resetting device for the ring crane gantry of the nuclear power plant, the hydraulic cylinder includes a push rod and a sleeve, with the end of the sleeve hinged to the top of the ring crane main beam and the free end of the push rod hinged to one side of the gantry leg.
[0008] Furthermore, in the temporary tilting and resetting device of the aforementioned nuclear power plant ring crane gantry, the top of the ring crane main beam on one side of the base has a hinge lug, and the gantry legs are hinged to the hinge lug via a rotating shaft.
[0009] In another aspect of the invention, a temporary tilting and repositioning method for a nuclear power plant ring gantry is also provided, comprising: Step 1: Install telescopic components between the two gantry legs of the ring-type gantry and the main beam of the ring-type gantry. The ring-type gantry is hinged to the base located above the main beam of the ring-type gantry via a rotating shaft. Step 2: Drive the two telescopic components to move synchronously, causing the ring gantry to rotate around the rotation axis towards the ring main beam, so that the ring gantry is in an inclined state and forms a first angle with the horizontal direction of the ring main beam. At this time, the elevation of the highest point of the ring gantry meets the height limit requirement for dome hoisting. Step 3: Drive the two telescopic components to move synchronously, causing the ring gantry to rotate around the rotation axis away from the ring gantry main beam, lifting the ring gantry from the tilted state of the first included angle to the tilted state of the second included angle, where the angle value of the second included angle is greater than that of the first included angle; Step 4: Hang wire ropes and hand-operated hoists between the first lifting lugs on both sides of the gantry beam and the corresponding second lifting lugs on the top of the main gantry beam. After tightening the wire ropes, remove the telescopic components on both sides. Step 5: Adjust the hand chain hoists on both sides of the ring gantry, so that one hand chain hoist tightens the rope and the other hand chain hoist loosens the rope, gradually pulling the ring gantry to a vertical working state; Step 6: Use fasteners to connect and fix the bottom of the gantry legs to the base, and lock the locking components between the gantry legs and the base. After confirming that the gantry is fixed, remove the wire ropes and hand-operated hoists on both sides to complete the ring-lift gantry reset.
[0010] The temporary tilting and resetting device and method for nuclear power plant ring gantry of the present invention has the following advantages and positive effects: (1) The present invention does not require the overall disassembly and secondary hoisting of the ring crane gantry, which can greatly reduce the construction cycle, reduce the investment of large lifting equipment and high-altitude operations, and significantly reduce the safety risks of on-site construction; at the same time, the overall structure modification is small, and the function can be realized by adding hinge components, telescopic components and traction components based on the original ring crane structure, without the need to redesign the main body of the ring crane, which can effectively control the modification cost, while taking into account construction efficiency, operational safety and engineering economy; (2) The present invention adopts a two-stage control method to complete the large-range posture adjustment by telescopic components and to achieve fine-tuning by hand-operated hoist and steel wire rope. The gantry posture adjustment process is stable and controllable, with high reset accuracy, which can effectively avoid the impact and jamming problems during the adjustment process. Moreover, all the components used in the scheme are mature and universal parts in the engineering field, with strong adaptability. They can be promoted and applied to ring hoisting equipment of different specifications and similar gantry structures with temporary height reduction requirements, and have good engineering application and promotion value. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the temporary tilting and resetting device for the nuclear power plant ring gantry of the present invention; Figure 2 This is a side view of the temporary tilting and resetting device for the nuclear power plant ring gantry of the present invention; Figure 3 This is a schematic diagram of the tilting state of the temporary tilting and resetting device for the nuclear power plant ring gantry of the present invention; Figure 4 This is a schematic diagram of the working state of the temporary tilting and resetting device for the nuclear power plant ring gantry of the present invention.
[0012] Explanation of reference numerals in the attached figures: 1. Ring-type gantry; 2. Ring-type main beam; 3. Base; 4. Rotating shaft; 5. Telescopic assembly; 6. Gantry leg; 7. Wire rope; 8. Gantry crossbeam; 9. First lifting lug; 10. Second lifting lug. Detailed Implementation
[0013] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0014] This invention provides a temporary tilting and repositioning device and method for a nuclear power plant ring crane gantry, such as... Figures 1 to 4 As shown, the temporary tilting and resetting device for the ring-mounted gantry of the nuclear power plant is installed above the main ring-mounted beam 2 of the ring-mounted bridge. It includes a base 3 spaced above the main ring-mounted beam 2, a ring-mounted gantry 1 hinged to the base 3 via a rotating shaft 4, and two telescopic components 5 positioned between one side of the ring-mounted gantry 1 and the main ring-mounted beam 2. More specifically, the telescopic components 5 serve as the power actuators for large-range adjustment of the gantry's posture, driving the gantry to complete tilting and initial lifting actions around the rotating shaft 4. The two telescopic components 5 are synchronously driven to ensure consistent rotation angles on both sides of the gantry, preventing torsional deformation due to uneven stress and protecting the structural accuracy of the gantry. The rotating shaft 4 forms the rotation center of the gantry, allowing the ring-mounted gantry 1 to rotate around the rotation center in a vertical plane, achieving a smooth switch between tilting and working postures. The ring-lift gantry 1 includes gantry legs 6 respectively set above the base 3 and gantry beam 8 set between the tops of the two gantry legs 6. Two first lifting lugs 9 are symmetrically arranged on both sides of the gantry beam 8. The first lifting lugs 9 serve as the force-bearing nodes for the tension load during the resetting operation, and are used to connect the tensioning components and stably transmit the tension force. One end of the bottom of the gantry leg 6 is hinged to one side of the base 3 through a rotating shaft 4, and the other end is connected to the base 3 through a locking assembly. When the gantry is in the vertical working state, the locking assembly is in the locked state, which can transmit the vertical and horizontal loads borne by the gantry, firmly lock the bottom of the gantry to the base 3, prevent the gantry from shifting or loosening in the working state, and ensure the structural stability during the ring-lift operation. Multiple second lifting lugs 10 are spaced apart on the top of the main beam 2 of the ring crane. The multiple second lifting lugs 10 are symmetrically distributed on both sides of the ring crane gantry 1. The positions of the second lifting lugs 10 match the positions of the first lifting lugs 9. A wire rope 7 and a hand chain hoist are connected between the first lifting lugs 9 and the second lifting lugs 10. The hand chain hoist has a self-locking feature and can precisely control the pulling length through the rope winding and unwinding action, so as to finely adjust the posture of the gantry. During the adjustment process, the current posture can be locked at any time, which is convenient for operators to perform posture calibration and inspection, and ensure that the gantry is stably and accurately reset to the vertical working state.
[0015] In one specific implementation, in the temporary tilting and resetting device for the nuclear power plant ring gantry of the present invention, the telescopic component 5 contains a hydraulic cylinder. By driving the push rod to extend and retract through hydraulic power, the gantry legs 6 can be rotated around the rotation axis 4, thereby achieving a wide range of control over the tilting angle of the gantry.
[0016] As a specific implementation, in the temporary tilting and resetting device of the nuclear power plant ring crane gantry of the present invention, the hydraulic cylinder includes a push rod and a sleeve. The end of the sleeve is hinged to the top of the ring crane main beam 2, and the free end of the push rod is hinged to one side of the gantry leg 6. Both ends of the telescopic component 5 are hinged, which can adapt to the angle change during the rotation of the gantry, avoid structural interference and additional internal forces, and ensure smooth and stable force transmission.
[0017] As a specific implementation, in the temporary tilting and resetting device of the nuclear power plant ring gantry of the present invention, the top of the ring main beam 2 provided on one side of the base 3 has a hinge lug, and the gantry leg 6 is hinged to the hinge lug through the rotating shaft 4. The hinge lug and the rotating shaft 4 cooperate to enhance the load-bearing capacity and rotation smoothness of the hinged part, disperse the local stress during the rotation process, and ensure the positional accuracy of the rotation center and the structural reliability during the rotation of the gantry.
[0018] On the other hand, the temporary tilting and resetting method for the nuclear power plant ring gantry of the present invention is implemented using the aforementioned temporary tilting and resetting device for the nuclear power plant ring gantry, and specifically includes the following steps: Step 1: Install telescopic components 5 between the two gantry legs 6 of the ring-hanging gantry 1 and the ring-hanging main beam 2 respectively. The ring-hanging gantry 1 is hinged to the base 3 set above the ring-hanging main beam 2 through the rotating shaft 4. Release the locking component between the bottom of the gantry and the base 3 to give the gantry the freedom to rotate freely around the rotating shaft 4. Step 2: Drive the two telescopic components 5 to move synchronously, causing the ring gantry 1 to rotate around the rotation axis 4 towards the ring main beam 2, so that the ring gantry 1 is tilted and forms a first angle with the horizontal direction of the ring main beam 2. At this time, the elevation of the highest point of the ring gantry 1 meets the height limit requirement for dome hoisting. During the tilting process, keep the telescopic components 5 on both sides moving synchronously and at a uniform speed to avoid the gantry from tilting, jamming, and impact vibration, and ensure that the tilting process is stable and controllable. After the gantry is tilted into place, the current state of the telescopic components 5 can be locked to maintain the tilting posture of the gantry. Then, the subsequent dome hoisting operation can be carried out. The main structure of the gantry does not need to be dismantled throughout the process. Step 3: Drive the two telescopic components 5 to move synchronously, causing the ring gantry 1 to rotate around the rotation axis 4 in a direction away from the ring gantry main beam 2, lifting the ring gantry 1 from the tilted state of the first included angle to the tilted state of the second included angle. The angle value of the second included angle is greater than that of the first included angle. In this stage, the stable power provided by the telescopic components 5 is used to complete a large range of adjustment of the gantry posture, raising the gantry to a posture that is convenient for installing the traction system, providing a foundation for subsequent fine resetting; Step 4: Hang wire rope 7 and hand chain hoist between the first lifting lug 9 on both sides of the gantry beam 8 of the ring crane gantry 1 and the second lifting lug 10 corresponding to the top of the ring crane main beam 2. After tightening the wire rope 7, remove the telescopic components 5 on both sides to complete the smooth switching of the power execution components and prepare for subsequent fine posture adjustment. Step 5: Adjust the hand chain hoists on both sides of the ring gantry 1, so that one hand chain hoist tightens the rope and the other hand chain hoist loosens the rope, gradually pulling the ring gantry 1 to a vertical working state. During the adjustment process, the verticality of the gantry can be finely calibrated by slightly tightening and loosening a single hand chain hoist. Relying on the self-locking characteristics of the hand chain hoist, the current posture can be locked at any time for inspection to ensure the positional accuracy of the gantry reset, while avoiding impact and shaking of the gantry. Step 6: Use fasteners to connect and fix the bottom of the gantry leg 6 to the base 3, and lock the locking component between the gantry leg 6 and the base 3. After confirming that the gantry is fixed, remove the steel wire ropes 7 and the hand chain hoist on both sides to complete the repositioning of the ring-lift gantry 1.
[0019] In summary, compared with the prior art, the temporary tilting and resetting device and method for nuclear power plant ring gantry of the present invention has the following advantages and positive effects: (1) Compared with the traditional overall disassembly and assembly of the gantry, the present invention does not require the overall disassembly and secondary hoisting of the ring gantry 1, which can greatly reduce the construction cycle, reduce the investment of large lifting equipment and high-altitude operations, and significantly reduce the safety risks of on-site construction; at the same time, the overall structure modification is small, and the function can be realized by simply adding hinge components, telescopic components 5 and traction components to the original ring gantry structure, without the need to redesign the main body of the ring gantry, which can effectively control the modification cost, while taking into account construction efficiency, operational safety and engineering economy; (2) The present invention adopts a two-stage control method to complete the large-range posture adjustment by telescopic component 5 and to achieve fine-tuning by hand-operated hoist and steel wire rope 7. The posture adjustment process of the gantry is stable and controllable, with high reset accuracy, which can effectively avoid the impact and jamming problems during the adjustment process. Moreover, all the components used in the scheme are mature and universal parts in the engineering field, with strong adaptability. They can be promoted and applied to ring hoisting equipment of different specifications and similar gantry structures with temporary height reduction requirements, and have good engineering application and promotion value.
[0020] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.
[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A temporary tilting and resetting device for a ring-type gantry crane in a nuclear power plant, wherein the temporary tilting and resetting device is disposed above the main ring-type gantry crane beam of the ring-type gantry crane, characterized in that, It includes a base spaced apart above the main ring-lift beam, a ring-lift gantry hinged to the base via a rotating shaft, and two telescopic components positioned between one side of the ring-lift gantry and the main ring-lift beam, wherein: The ring-type gantry includes gantry legs respectively set above the base and a gantry beam set between the tops of the two gantry legs. Two first lifting lugs are symmetrically arranged on both sides of the gantry beam. One end of the bottom of the gantry leg is hinged to one side of the base through a rotating shaft, and the other end is connected to the base through a locking assembly. Multiple second lifting lugs are spaced apart on the top of the main beam of the ring crane. The multiple second lifting lugs are symmetrically distributed on both sides of the ring crane gantry. The positions of the second lifting lugs match the positions of the first lifting lugs. A wire rope and a hand-operated hoist connect the first and second lifting lugs.
2. The temporary tilting and resetting device for a nuclear power plant ring crane gantry according to claim 1, characterized in that, The telescopic assembly contains a hydraulic cylinder.
3. The temporary tilting and resetting device for a nuclear power plant ring crane gantry according to claim 2, characterized in that, The hydraulic cylinder includes a push rod and a sleeve. The end of the sleeve is hinged to the top of the main beam of the ring crane, and the free end of the push rod is hinged to one side of the gantry leg.
4. The temporary tilting and resetting device for a nuclear power plant ring crane gantry according to claim 1, characterized in that, The main beam of the ring-shaped suspension on one side of the base has a hinge lug at the top, and the gantry legs are hinged to the hinge lug via a rotating shaft.
5. A temporary tilting and resetting method for a nuclear power plant ring crane gantry, the temporary tilting and resetting method being implemented using the temporary tilting and resetting device as described in any one of claims 1 to 4, comprising: Step 1: Install telescopic components between the two gantry legs of the ring-type gantry and the main beam of the ring-type gantry. The ring-type gantry is hinged to the base located above the main beam of the ring-type gantry via a rotating shaft. Step 2: Drive the two telescopic components to move synchronously, causing the ring gantry to rotate around the rotation axis towards the ring main beam, so that the ring gantry is in an inclined state and forms a first angle with the horizontal direction of the ring main beam. At this time, the elevation of the highest point of the ring gantry meets the height limit requirement for dome hoisting. Step 3: Drive the two telescopic components to move synchronously, causing the ring gantry to rotate around the rotation axis away from the ring gantry main beam, lifting the ring gantry from the tilted state of the first included angle to the tilted state of the second included angle, where the angle value of the second included angle is greater than that of the first included angle; Step 4: Hang wire ropes and hand-operated hoists between the first lifting lugs on both sides of the gantry beam and the corresponding second lifting lugs on the top of the main gantry beam. After tightening the wire ropes, remove the telescopic components on both sides. Step 5: Adjust the hand chain hoists on both sides of the ring gantry, so that one hand chain hoist tightens the rope and the other hand chain hoist loosens the rope, gradually pulling the ring gantry to a vertical working state; Step 6: Use fasteners to connect and fix the bottom of the gantry legs to the base, and lock the locking components between the gantry legs and the base. After confirming that the gantry is fixed, remove the wire ropes and hand-operated hoists on both sides to complete the ring-lift gantry reset.