Large expansion joint support transfer device for nuclear power plant

Abstract

The utility model discloses a nuclear power station large expansion joint support transfer device, including support frame and mobile lifting mechanism, the support frame top is equipped with the placement expansion joint's settlement area, mobile lifting mechanism includes parallel interval setting on the settlement area opposite two sides on translation track, at least one gyro wheel subassembly of cooperation in every translation track, the lifting subassembly of connection in gyro wheel subassembly, with fixed component of lifting subassembly connection and be used for fixed on expansion joint side edge, the utility model discloses support frame and mobile lifting mechanism cooperation form, realize to expansion joint and support and to expansion joint and promote and translation, adapt to the dismounting demand of different unit expansion joint of nuclear power station, while give consideration to light weight and high stability, improve the versatility and applicability of equipment, also ensure the possibility of efficient operation in complex, narrow environment.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for the maintenance of large equipment in nuclear power plants, and in particular to a support and transfer device for large expansion joints in nuclear power plants. Background Technology

[0002] The large rubber expansion joints in the circulating water system of nuclear power plants are bulky (approximately φ3200mm × 550mm), require narrow installation spaces, and lack specialized hoisting equipment. Traditional disassembly and assembly methods, which require a combination of steel supports, jacks, and hand-operated hoists, have several drawbacks: the support structure is fixed and cannot accommodate the spatial differences between some nuclear power plants' Units 1-2 and 3-6 (length differences of up to 2000mm); it also results in poor stability on uneven ground. During lifting, the low precision of the alignment between the translation structure and the support structure, the easy jamming of the rollers, and insufficient synchronicity in lifting can cause the expansion joint to tilt, posing a risk of collision. Furthermore, it requires multiple people to operate, severely impacting the maintenance schedule. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a support and transfer device for a large expansion joint in a nuclear power plant.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to provide a large expansion joint support and transfer device for nuclear power plants, including a support frame and a moving and lifting mechanism; The top of the support frame is provided with a placement area for expansion joints; The mobile lifting mechanism includes parallel translation tracks spaced apart on opposite sides of the placement area, at least one roller assembly cooperating on each translation track, a lifting assembly connected to the roller assembly, and a fixing assembly connected to the lifting assembly and used to fix it to the side of the expansion joint. The roller assembly can move back and forth along the translation track, driving the lifting assembly and the expansion joint to move; the lifting assembly is connected to the expansion joint through the fixing assembly, driving the expansion joint to rise and fall on the translation track.

[0005] Preferably, each of the translation tracks is fitted with at least two sets of the roller assemblies.

[0006] Preferably, the support frame includes a plurality of spaced columns, a plurality of horizontal beams and a plurality of vertical beams connected between the tops of the columns, a plurality of transverse connecting rods and a plurality of longitudinal connecting rods connected between the middle parts of the columns; the placement area is formed on the horizontal beams and the vertical beams; the translation track is disposed on the horizontal beams.

[0007] Preferably, the support frame further includes scissor braces connecting the columns.

[0008] Preferably, the support frame further includes a leveling mechanism, which includes a plurality of heavy-duty feet; the bottom of each column is supported on the ground by the heavy-duty feet.

[0009] Preferably, the roller assembly includes a rail-clamping roller.

[0010] Preferably, the fixing component includes a fixing member that is engaged between the flanges of the expansion joint and a locking member that locks the fixing member between the flanges.

[0011] Preferably, the lifting assembly includes a lifting screw or a lifting cylinder.

[0012] Preferably, the large expansion joint support and transfer device for nuclear power plants further includes a traction mechanism; The traction mechanism includes a traction bracket disposed on the side of the expansion joint in the direction of movement of the expansion joint, and a winch connected to the traction bracket; the winch is installed on the side of the support frame.

[0013] Preferably, the nuclear power plant large expansion joint support and transfer device further includes an operating platform detachably connected to the support frame; the operating platform is equipped with guardrails.

[0014] The beneficial effects of this utility model are as follows: It is formed by the cooperation of the support frame and the mobile lifting mechanism, which realizes the support, lifting and translation of the expansion joint, adapts to the disassembly and assembly requirements of expansion joints of different units in nuclear power plants, and takes into account both lightweight and high stability; it improves the versatility and applicability of the equipment, and also ensures the possibility of efficient operation in complex and narrow environments. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a front structural schematic diagram of a large expansion joint support and transfer device for nuclear power plants according to an embodiment of this utility model; Figure 2 This is a side view of a nuclear power plant large expansion joint support and transfer device according to an embodiment of the present invention; Figure 3 This is a top view schematic diagram of a nuclear power plant large expansion joint support and transfer device according to an embodiment of the present invention. Detailed Implementation

[0016] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0017] like Figures 1-3As shown, an embodiment of the present invention discloses a large expansion joint support and transfer device for nuclear power plants, comprising a support frame and a movable lifting mechanism. The support frame serves as the support platform for the entire device and is used to support the expansion joint; the movable lifting mechanism is fitted onto the support frame and detachably connected to the expansion joint, and moves and lifts the expansion joint by moving and lifting it on the support frame.

[0018] The support frame has a placement area at the top for placing the expansion joint 100. The placement area may further include at least two sites, including an initial placement site and a hoisting site.

[0019] Specifically, the supporting frame may include several columns 10, several crossbeams 11, and several longitudinal beams 12. The columns 10 are arranged at intervals, for example, in a rectangular shape. The longitudinal beams 12 and the crossbeams 11 are connected between the columns 10 in a longitudinal and transverse arrangement to form a frame structure. The number of columns 10 can be increased or decreased according to actual needs to increase or decrease the volume of the supporting frame.

[0020] Alternatively, a number of crossbeams 11 and a number of longitudinal beams 12 are connected between the tops of the columns 10, defining a placement area at the top of the columns 10. In an embodiment where the support frame is rectangular, two crossbeams 11 may correspond to the long sides of the rectangle, two longitudinal beams 12 may correspond to the short sides of the rectangle, and the remaining longitudinal beams 12 are located between the two short sides and connected between the two crossbeams 11, thereby improving the structural strength of the support frame. The length of the longitudinal beams 12 is greater than or equal to the diameter of the expansion joint 100.

[0021] The column 10 is preferably formed of aluminum alloy square tubing. The crossbeam 11 and the longitudinal beam 12 can also be formed of aluminum alloy square tubing.

[0022] In some embodiments, the support frame further includes a plurality of transverse connecting rods 13 and a plurality of longitudinal connecting rods 14 connected between the middle portions of the columns 10 to reinforce the structure of the support frame. The plurality of transverse connecting rods 13 and the plurality of longitudinal connecting rods 14 may be provided in one or more layers, such as three layers.

[0023] The transverse link 13 and the longitudinal link 14 can be formed from aluminum alloy square tubing.

[0024] To further improve the deformation resistance of the support frame, the support frame may also include scissor braces 15 connected between the columns 10. The scissor braces 15 are preferably located on the four sides of the support frame and connected between two adjacent columns 10.

[0025] The crossbeam 11 and the column 10, and the longitudinal beam 12 and the column 10, can be fixedly connected by welding or by fastening components. The transverse connecting rod 13 and the column 10, and the longitudinal connecting rod 14 and the column 10, can also be fixedly connected by welding or by fastening components.

[0026] Furthermore, the support frame also includes a leveling mechanism. The leveling mechanism includes several heavy-duty feet 17; the bottom of each column 10 is supported on the ground by the heavy-duty feet 17; the height of each heavy-duty foot 17 is adjusted by a screw on it, and by adjusting the height of the heavy-duty feet 17 at the bottom of each column 10, the levelness of the entire support frame is ensured.

[0027] The heavy-duty hoof 17 is preferably equipped with a universal support plate.

[0028] The mobile lifting mechanism may include two translation rails 20, which are parallel and spaced apart on opposite sides of the placement area, specifically on two opposite crossbeams 11. The translation rails 20 provide guidance for the movement of the expansion joint 100, guiding the expansion joint 100 from its initial placement point to its hoisting point within the placement area.

[0029] The mobile lifting mechanism also includes at least one roller assembly 21 mating on each translation track 20, a lifting assembly 22 connected to the roller assembly 21, and a fixing assembly 23 connected to the lifting assembly 22 and used for fixing to the side of the expansion joint 100. Through the mating of the fixing assembly 23 and the expansion joint 100, and the lifting assembly 22, the lifting assembly 22 can move back and forth along the translation track 20, driving the lifting assembly 22 and the expansion joint 100 to move; the lifting assembly 22 is connected to the expansion joint through the fixing assembly 23, driving the expansion joint 100 to rise and fall on the translation track 20.

[0030] Preferably, each translation track 20 is equipped with at least two sets of roller assemblies 21, and correspondingly has two sets of lifting assemblies 22 and fixing assemblies 23. Within the placement area, one side of the expansion joint 100 is movably supported on a translation track 20 by two sets of roller assemblies 21. Both translation tracks 20 are provided with at least roller assemblies 21 and corresponding lifting assemblies 22 and fixing assemblies 23, so that the expansion joint 100 is stably supported on the translation track 20.

[0031] The lifting action of each lifting component 22 can drive the expansion joint 100 connected to it to lift or lower. By synchronizing the actions of all lifting components 22, the expansion joint 100 as a whole can be driven to lift or lower.

[0032] Specifically, each translation track 20 can be assembled from multiple clamping plates. The roller assembly 21 includes clamping rollers that are clamped onto the translation track 20.

[0033] The lifting assembly 22 includes a lifting screw or a lifting cylinder.

[0034] The fixing component 23 may specifically include a fixing member 231 and a locking member. The fixing member 231 is engaged between the flanges of the expansion joint 100, and the locking member passes through the flange and the fixing member 231 to lock the fixing member 231 between the flanges.

[0035] In some embodiments, the translation track 20 is further provided with a limiting mechanism to block the roller assembly 21 and prevent the expansion joint 100 from moving out of the placement area. Preferably, limiting mechanisms 24 are respectively provided at the starting point and the ending point of the placement area. The limiting mechanism 24 includes a limiting block or a limiting plate.

[0036] To ensure the expansion joint 100 is accurately positioned within the installation area, a centering mechanism 30 may be provided at both the initial placement point and the hoisting point in the installation area, ensuring that the expansion joint 100 is accurately placed at either the initial placement point or the hoisting point. The centering mechanism 30 may include a centering column, which achieves centering by aligning with the flange hole on the expansion joint 100.

[0037] Furthermore, the nuclear power plant large expansion joint support and transfer device of this utility model may also include a traction mechanism to provide traction force to drive the expansion joint 100 to move back and forth on the translation track 20.

[0038] Alternatively, the traction mechanism may include a traction bracket 41 and a winch 42 connected to the traction bracket 41. The traction bracket 41 is located in the direction of movement of the expansion joint 100, and is fixed to the side of the expansion joint 100 by fasteners such as bolts. The winch 42 is mounted on the side of the support frame, and the steel cable of the winch 42 can pull the traction bracket 41 by winding it up, thereby pulling the expansion joint 100.

[0039] The winch 42 can be either electric or hand-cranked.

[0040] The large expansion joint support and transfer device for nuclear power plants also includes an operating platform 50 that is detachably connected to the support frame; the operating platform 50 is equipped with guardrails 52.

[0041] The operating platform 50 includes a footboard 51 and a guardrail 52. The footboard 51 provides a platform for workers to stand on while connecting and disassembling the expansion joint 100. The guardrail 52 provides protection for workers. Alternatively, the footboard 51 can be installed within the placement area and connected between the crossbeam 11 and the longitudinal beam 12. Its stability can also be improved by connecting it to the uprights 10. The guardrail 52 is located around the footboard 51 and also around the support frame.

[0042] The operating platform 50 can be located at the top of the support frame, or at the middle and / or bottom (lower end) of the support frame. The operating platform 50 is positioned according to the operational needs.

[0043] In one embodiment of this utility model, the support and transfer device for a large expansion joint in a nuclear power plant is used after the support frame is erected. The heavy-duty feet 17 are adjusted for leveling, and the footplates 51 and guardrails 52 are installed. The translation track 20 is fixed to the crossbeam 11 of the support frame, and the fixing assembly 23 and the expansion joint 100 are connected. The rail clamping rollers and lifting screw are adjusted. The expansion joint 100 is lifted by the lifting screw, and the winch is operated to pull the traction bracket, which, in conjunction with the roller assembly 21, pulls the expansion joint 100 to the hoisting point.

[0044] In summary, in this invention, the support frame, through columns, beams, longitudinal beams, and connecting rods, forms a modular frame, which, combined with a detachable operating platform, creates a working space. Heavy-duty feet at the bottom allow for height adjustment. The mobile lifting mechanism, relying on a translational track, fixed components, rail-clamping rollers, and lifting screws, lifts the expansion joint, and achieves precise translation via a traction bracket and winch. This invention is adaptable to the different space requirements of nuclear power plant units 1-6, solving the problems of cumbersome operation and poor stability associated with traditional tool combinations, and significantly improving work efficiency in field applications.

[0045] Compared with traditional maintenance methods, the application of this utility model reduces the number of people required for disassembling and assembling expansion joints of a single unit from 6-8 to 3-4, and shortens the operation time from more than 12 hours to less than 6 hours. This improves work efficiency, shortens the unit overhaul cycle, indirectly increases the effective power generation time, significantly improves the overall production efficiency and economic benefits of the power plant, and provides a strong guarantee for the safe and stable operation of nuclear power units.

[0046] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A support and transfer device for a large expansion joint in a nuclear power plant, characterized in that, This includes the support frame and the mobile lifting mechanism; The top of the support frame is provided with a placement area for expansion joints; The mobile lifting mechanism includes parallel translation tracks spaced apart on opposite sides of the placement area, at least one roller assembly cooperating on each translation track, a lifting assembly connected to the roller assembly, and a fixing assembly connected to the lifting assembly and used to fix it to the side of the expansion joint. The roller assembly can move back and forth along the translation track, driving the lifting assembly and the expansion joint to move; the lifting assembly is connected to the expansion joint through the fixing assembly, driving the expansion joint to rise and fall on the translation track.

2. The nuclear power plant large expansion joint support and transfer device according to claim 1, characterized in that, Each of the translation tracks is fitted with at least two sets of the roller assemblies.

3. The nuclear power plant large expansion joint support and transfer device according to claim 1, characterized in that, The support frame includes several spaced columns, several horizontal beams and several vertical beams connected between the tops of the columns, several transverse connecting rods and several longitudinal connecting rods connected between the middle parts of the columns; the placement area is formed on the horizontal beams and the vertical beams; the translation track is set on the horizontal beams.

4. The large expansion joint support and transfer device for nuclear power plants according to claim 3, characterized in that, The support frame also includes scissor braces connecting the columns.

5. The nuclear power plant large expansion joint support and transfer device according to claim 3, characterized in that, The support frame also includes a leveling mechanism, which comprises several heavy-duty feet; the bottom of each column is supported on the ground by the heavy-duty feet.

6. The large expansion joint support and transfer device for nuclear power plants according to claim 1, characterized in that, The roller assembly includes rail-clamping rollers.

7. The nuclear power plant large expansion joint support and transfer device according to claim 1, characterized in that, The fixing assembly includes a fixing member that is engaged between the flanges of the expansion joint and a locking member that locks the fixing member between the flanges.

8. The nuclear power plant large expansion joint support and transfer device according to claim 1, characterized in that, The lifting assembly includes a lifting screw or a lifting cylinder.

9. The nuclear power plant large expansion joint support and transfer device according to any one of claims 1-8, characterized in that, The large expansion joint support and transfer device for the nuclear power plant also includes a traction mechanism; The traction mechanism includes a traction bracket disposed on the side of the expansion joint in the direction of movement of the expansion joint, and a winch connected to the traction bracket; the winch is installed on the side of the support frame.

10. The nuclear power plant large expansion joint support and transfer device according to any one of claims 1-8, characterized in that, The nuclear power plant's large expansion joint support and transfer device also includes an operating platform that is detachably connected to the support frame; the operating platform is equipped with guardrails.

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