CN112229080A - Sliding method and sliding device for megawatt tower type photo-thermal power generation heat collector - Google Patents
Sliding method and sliding device for megawatt tower type photo-thermal power generation heat collector Download PDFInfo
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- CN112229080A CN112229080A CN202011110825.0A CN202011110825A CN112229080A CN 112229080 A CN112229080 A CN 112229080A CN 202011110825 A CN202011110825 A CN 202011110825A CN 112229080 A CN112229080 A CN 112229080A
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- heat collector
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- thermal power
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S30/00—Arrangements for moving or orienting solar heat collector modules
- F24S30/20—Arrangements for moving or orienting solar heat collector modules for linear movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
Abstract
A slippage method and slippage device for a megawatt tower type photo-thermal power generation heat collector are disclosed, wherein a heat absorption tower is established on the ground at the installation position of the tower type photo-thermal power generation heat collector, and an internal space for hoisting the tower type photo-thermal power generation heat collector is reserved in the heat absorption tower according to the size of the tower type photo-thermal power generation heat collector; then integrally assembling the tower type photo-thermal power generation heat collector on the ground; and the assembled tower type photo-thermal power generation heat collector integrally slides to the center in the heat absorption tower from an assembly site by using a sliding device through a sliding channel. According to the invention, the megawatt tower type photo-thermal power generation heat collector is assembled on the ground and integrally hoisted from the inside of the heat absorption tower to the top of the tower, so that the construction period can be effectively shortened, a large amount of overhead work is reduced, and the safe construction is greatly ensured.
Description
Technical Field
The invention relates to a component moving mode and a system device of a tower type photo-thermal power generation system, in particular to a moving method and a device of a megawatt tower type photo-thermal power generation heat collector; the moving method and the device of the megawatt tower type photo-thermal power generation heat collector can realize the integral movement of the megawatt tower type photo-thermal power generation heat collector; belongs to the technical field of heavy object hoisting operation.
Background
The solar photo-thermal power generation is realized by collecting solar heat energy by utilizing a large-scale array parabolic or dish-shaped mirror surface, providing steam through a heat exchange device and combining the process of a traditional turbonator. The solar photo-thermal power generation technology is adopted, so that an expensive silicon crystal photoelectric conversion process is avoided, and the cost of solar power generation can be greatly reduced. Moreover, the solar energy utilization in the form has an incomparable advantage compared with other forms of solar energy conversion, namely water heated by solar energy can be stored in a huge container, and a turbine can still be driven to generate electricity for several hours after the sun lands. Therefore, as the technology is improved continuously and the environmental protection is paid more and more attention in the world, the solar photo-thermal power generation is more and more commonly applied in all parts of the world and the power of the power generation is also more and more increased as the photo-thermal power generation is taken as a clean energy source. Solar photo-thermal power generation becomes an important direction for new energy utilization.
According to different solar energy collection modes, solar photo-thermal power generation is mainly divided into four types, namely tower type, groove type, disc type and linear Fresnel type. The tower type solar photo-thermal power generation has better development prospect because the tower type solar photo-thermal power generation has the comprehensive advantages of slot type, butterfly type, linear Fresnel type and the like which are difficult to compare favorably in the aspects of scale, photoelectric conversion efficiency, investment cost and the like, and the development and research of the tower type photo-thermal power generation technology are more and more concerned in all countries at present.
The tower-type solar photo-thermal power generation mainly comprises a heliostat field consisting of a plurality of heliostats, solar energy is reflected and concentrated on a high-temperature receiver (also called a heat collector) at the top of a high tower in the middle of the heliostat field, is converted into heat energy, is transmitted to a working medium to be heated, passes through a heat accumulator and is input into a heat engine to drive a generator to generate power. The tower type photo-thermal power generation system consists of five subsystems, namely a light condensation subsystem, a heat collection subsystem, a power generation subsystem, a heat storage subsystem and an auxiliary energy subsystem. Wherein, the light-gathering subsystem and the heat-collecting subsystem form the core technology. One key point for the construction and installation of the tower type photo-thermal power station is the installation of the heat collector. Along with the increasing power of solar photo-thermal power generation, the heat collector is also increased, and the heat collector is generally integrally hoisted to a heat absorption tower after being combined on the ground, so that the total project period can be shortened, and the installation quality can be ensured. At present, the heat collectors are all installed by adopting tower cranes, which is still applicable to small and medium-sized tower type solar photo-thermal power generation systems below megawatt level, but once the megawatt level is reached, a simple tower type hoisting mode is adopted, which is very difficult, and a hoisting task can be completed only by the cooperative coordination of a plurality of tower cranes; if the tower is disassembled for hoisting, the assembly is needed on the top of the tower, which causes much inconvenience to the construction, so that the improvement is needed.
Through patent search, no relevant patent technical literature reports are found, the most relevant patent technical literature is a paper, and the relevant literature includes the following:
1. the patent number is CN201810608898.9, the name is "a module drill sliding device", this patent discloses a module drill sliding device, by hydraulic pressure station, hydraulic pressure operation panel, step mechanism, pipe-line system, direction location, clamping mechanism constitute, the said hydraulic pressure station is equipped with 2 power units, the said hydraulic pressure station is connected to the hydraulic pressure operation panel through the pipe-line system, the said hydraulic pressure operation panel is connected to the step mechanism through the pipe-line system, the said step mechanism includes a mobile hydraulic cylinder and a pack of pawl mechanism, the said pawl mechanism has direction location piece and fixed clamping mechanism.
2. The patent number is CN202010365560.2, and is named as an invention patent of 'a groove type solar heat collector hoisting and positioning method', and the patent discloses a groove type solar heat collector hoisting and positioning method, which comprises the following steps: s1, hoisting the two groove type solar heat collectors; s2, hoisting the rest of the trough type solar thermal collectors; and S3, adjusting and connecting the groove type solar heat collector. When the trough type solar thermal collector is lifted, all the trough type solar thermal collectors are matched with the positioning shaft and the positioning hole to position the center position, and then the orientation of the trough type solar thermal collector is adjusted. When the indication readings of the leveling instrument aligned to the tower rulers hung at the symmetrical structural positions on the cantilevers at the left side and the right side of the trough-type solar heat collector are the same, the indication that the trough-type solar heat collector is just upward in the positive direction is meant. All the groove type solar heat collectors can be conveniently adjusted to be upwards forward and then fixedly connected with the adjacent groove type solar heat collectors.
3. The patent number is CN201620778657.5, the utility model patent of "light and heat electricity generation heat collector module integral hoisting hoist" this patent discloses light and heat electricity generation heat collector module integral hoisting hoist, and it is big to have solved heat collector module overall dimension, hoists difficult technical problem. The central position of cross arm is provided with U-shaped front bracket in the front, and the central position of cross arm is provided with U-shaped rear bracket in the back, and the torque tube on the heat collector module sets up in U-shaped front bracket and U-shaped rear bracket, has connect preceding semicircular staple bolt in the front end of torque tube lock, and preceding semicircular staple bolt links together with U-shaped front bracket, has connect latter half circular staple bolt in the rear end lock of torque tube, and latter half circular staple bolt links together with U-shaped rear bracket.
Through the analysis of the patent documents, the inventor finds that the patents relate to the lifting or sliding, and the research on the integral lifting of the solar-thermal power generation heat collector module also provides improved technical schemes, but the technical schemes still have problems, and still do not solve the problem of how to solve the movement of the tower type solar photo-thermal power generation heat collector after the heat collector is assembled when the heat collector is too heavy in the lifting process, so that a plurality of unexpected problems and faults still occur in the practical application, and therefore further research is still needed.
Disclosure of Invention
The invention aims to provide a novel megawatt tower type photo-thermal power generation heat collector sliding method and a novel installation system device aiming at the defects of the existing megawatt tower type photo-thermal power generation heat collector sliding method.
In order to achieve the purpose, the invention provides a sliding method of a megawatt tower type photo-thermal power generation heat collector, which comprises the steps of firstly establishing a heat absorption tower on the ground at the installation position of the tower type photo-thermal power generation heat collector, and reserving an internal space for hoisting the tower type photo-thermal power generation heat collector inside the heat absorption tower according to the size of the tower type photo-thermal power generation heat collector; then integrally assembling the tower type photo-thermal power generation heat collector on the ground; and the assembled tower type photo-thermal power generation heat collector integrally slides to the center in the heat absorption tower from an assembly site by using a sliding device through a sliding channel.
Further, the tower type solar-thermal power generation heat collector is assembled on the ground, namely a tower type solar-thermal power generation heat collector assembling area is arranged in a safety area at the periphery of the heat absorption tower, a heat collector support ring is manufactured in the tower type solar-thermal power generation heat collector assembling area, the heat collector support ring is composed of a plurality of support legs and an annular steel structure, and the heat collector support ring is supported on the hardened ground of the tower type solar-thermal power generation heat collector assembling area through the support legs; and then, carrying out ground assembly on the tower type solar-thermal power generation heat collector on the heat collector support ring according to the assembly requirement of the tower type solar-thermal power generation heat collector, and well installing all parts of the tower type solar-thermal power generation heat collector.
Furthermore, the ground assembly of the tower type solar-thermal power generation heat collector is realized by combining all parts of the tower type solar-thermal power generation heat collector on the support ring, and the ground inspection acceptance is qualified after the assembly is finished, so that the tower type solar-thermal power generation heat collector meets the requirements of sliding and lifting.
Furthermore, a sliding channel from an assembly field to the inner center of the heat absorption tower is constructed on the ground, wherein a main channel is arranged from an assembly area of the tower type photo-thermal power generation heat collector to the inner center of the heat absorption tower and serves as a sliding moving channel, and a sliding track is laid on the sliding moving channel; 4 sets of sliding devices are arranged on the sliding tracks, and the heat collector support ring is arranged on the sliding devices; after all the components of the heat collector are combined on the support ring, the support ring provided with the tower type photo-thermal power generation heat collector is integrally slid to the center inside the heat absorption tower through the sliding device.
Further, the support ring provided with the tower type photo-thermal power generation heat collector integrally slides to the center inside the heat absorption tower through the sliding device, namely the sliding devices arranged below the support ring of the heat collector synchronously slide in sections, and the support ring provided with the tower type photo-thermal power generation heat collector integrally slides to the center inside the heat absorption tower; the sliding device is a sliding shoe provided with a floating plate, the bottom of the sliding shoe is provided with the floating plate, the bottom of the floating plate is made of stainless steel, the floating plate is arranged in a sliding track, and the sliding track is provided with a polytetrafluoroethylene or high-density polyethylene cushion block; the floating plate is provided with a main oil top, a square flange on the main oil top is tightly attached to a flange on the lower surface of the heat collector supporting annular beam, and the position of the sliding device is adjusted to ensure that the flange of the main oil top is opposite to the bottom of the supporting annular beam.
Furthermore, the rear surface of the sliding shoe is connected with a hydraulic crawler, and the sliding device is pushed by the hydraulic crawler to slide; when slipping, the heat collector support ring is jacked up through the main oil, so that the supporting legs of the heat collector support ring are separated from the ground, and then the slipping device is pushed to slip through the hydraulic crawler; the sliding distance is 500-700mm each time, a computer control system is used for monitoring whether the stroke and the load of each sliding device are consistent or not in the sliding process, the load of the sliding devices is basically consistent in one stroke, and the deviation is not more than 5%; and when the sliding of the stroke is finished once, the load and the stroke of the pushing device are adjusted through the computer control system, the synchronous action of the four sliding devices is ensured, and the operation is repeated until the heat collector slides to the position right below the in-place position in the tower.
Furthermore, the foundation of the assembly area and the sliding moving channel needs to be calculated and designed according to the weight of the tower type photo-thermal power generation heat collector so as to meet the bearing of the ultra-large and overweight component, and the assembly area and the sliding moving channel are used as the main areas for the combination and sliding of the heat collector.
A megawatt tower type solar-thermal power generation heat collector sliding system device comprises a heat collector support ring, a sliding device and a sliding track; the sliding device is installed on the sliding rail, the sliding rail extends to the inside of the center of the heat absorption tower from the assembly area of the tower type photo-thermal power generation heat collector, where the heat collector support ring is installed with the tower type photo-thermal power generation heat collector, the heat collector support ring is placed on the sliding device when sliding, and the sliding devices synchronously slide to enter the inside of the center of the heat absorption tower.
Furthermore, the sliding device comprises sliding boots provided with floating plates, the whole sliding system comprises 4 sliding devices, each sliding device is provided with two sliding boots, the two sliding boots support one floating device, and the floating devices are in floating connection with the sliding boots to form the floating sliding device capable of adjusting the horizontal plane.
Furthermore, the bottom of the sliding shoe is made of stainless steel, the stainless steel part of the sliding shoe is arranged in the sliding track, and a polytetrafluoroethylene or high-density polyethylene cushion block is arranged on the sliding track to form the sliding shoe with small friction resistance; the floating device is provided with a main oil top, the main oil top flange is opposite to the bottom of the support ring beam by adjusting the position of the sliding device, the square flange on the main oil top is tightly attached to the flange on the lower surface of the sliding support ring beam by floating the floating device, and the square flange on the main oil top and the flange on the lower surface of the sliding support ring beam are fastened together by a fastener after being aligned; the rear surface of the sliding boot is connected with a hydraulic crawler, and the sliding device is pushed by the hydraulic crawler to slide.
The invention has the advantages that:
according to the invention, after the tower type photo-thermal power generation heat collector is integrally installed on the ground, the heat collector slides to the center in the heat absorption tower, and the floating sliding shoe is utilized to ensure the stability in the sliding process, so that the integral sliding can be realized, the installation time is saved, and the installation quality can be improved; the following advantages are mainly provided:
1. according to the invention, the tower type photo-thermal power generation heat collector is integrally slid into the heat absorption tower through the plurality of sets of sliding devices synchronously, and is integrally hoisted through the gantry in the tower hydraulically, so that the problems of abnormally high weight and height of the assembly after the 100MW tower type photo-thermal heat collector is combined, and difficulty in integral sliding and hoisting are solved;
2. the floating type sliding device is used for supporting the sliding support ring beam of the heat collector only when the heat collector slides integrally, and the foundation before sliding needs to be redesigned and processed, so that the prerequisite condition of stable sliding of the super-large assembly is provided;
3. when the whole body slides, a sliding method is optimized, the command is coordinated uniformly, and the risk that the component deflects and even topples due to external force and improper operation of the component in the sliding process is solved;
4. through the floating type sliding boots, the supporting mode of the sliding supporting ring beam of the heat collector by the sliding boots can be more stable, the problem that installation is not smooth due to the fact that the sliding boots and the oil filling top of the supporting ring beam are uneven is solved, the technical problem of heavy-load sliding is solved through a hoisting method of unified coordination command, and the sliding safety of equipment is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of a glide system according to an embodiment of the present invention;
FIG. 2 is a schematic view of the ring beam of the sliding part of the present embodiment;
FIG. 3 is a general configuration view of a displacement device of the displacement system of the present embodiment;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a schematic structural view of a sliding shoe of the sliding apparatus of this embodiment;
fig. 6 is a schematic structural view of the floating device of the sliding device of the present embodiment.
Detailed Description
The invention will be further elucidated with reference to the drawings and specific embodiments.
Example one
As shown in figure 1, a 100MW megawatt tower type photo-thermal power generation heat collector slipping method comprises the steps of firstly searching a proper place at the periphery of a heat absorption tower of a tower type photo-thermal power generation heat collector to establish an assembly area of the tower type photo-thermal power generation heat collector, then carrying out basic treatment on the assembly area, paving a slipping track on the basis of the treatment, then installing a slipping support annular beam of the tower type photo-thermal power generation heat collector on the slipping track, and then integrally assembling the tower type photo-thermal power generation heat collector on the slipping support annular beam; and the assembled tower type photo-thermal power generation heat collector integrally slides to the center in the heat absorption tower from an assembly site by using a sliding device through a sliding channel.
The tower type solar-thermal power generation heat collector sliding system 1 comprises a heat collector supporting ring beam 4, a sliding device 5 and a sliding track 2; the sliding device 5 is installed on the sliding rail 2, the sliding rail 2 extends from an assembling area 3 of a tower type photo-thermal power generation heat collector for installing the tower type photo-thermal power generation heat collector to the inside of the center of the heat absorption tower 6, the heat collector supporting ring beam 4 is placed on the sliding device 5 when sliding, and the 4 sliding devices synchronously slide the heat collector supporting ring beam provided with the tower type photo-thermal power generation heat collector 7 into the inside of the center of the heat absorption tower; see figure 1.
The collector supporting ring beam 4 is formed by combining 12 legs 401 and an annular steel structure ring beam 402 formed by combining a multi-section module, as shown in fig. 2; the ring beam 402 is formed by combining a plurality of frustum-shaped modules 403 through fasteners to form a ring-shaped steel beam; structural tension rods 404 are provided within the ring beam, by which the overall rigidity of the ring beam is enhanced.
The sliding device 5, see fig. 3, includes sliding shoes 501 with floating plates, the whole sliding system has 4 sets of sliding devices, each sliding device has two sliding shoes, two sliding shoes support a floating device 502, the floating device 502 and the sliding shoes 501 are in floating connection, forming a floating sliding device capable of adjusting the horizontal plane; the bottom of the sliding shoe 501 is a sliding block 503 made of stainless steel, see fig. 4; the sliding block 503 is installed in the sliding track 2, and a polytetrafluoroethylene or high-density polyethylene cushion block is arranged on the sliding track 2 to form a sliding shoe structure with small friction resistance; the floating device 502 is provided with a main oil cap 504, a floating block 506 is arranged below the floating device 502, the floating block 506 is attached to a floating spherical surface 507 on the upper surface of the sliding shoe 5, and elastic damping materials 508 are arranged around the floating block 506, as shown in fig. 5, so that the floating device 502 can be subjected to floating adjustment within a range of 360 degrees; the flange of the main oil top 504 is opposite to the bottom of the support ring beam by adjusting the position of the sliding device, and the flange above the main oil top 504 is tightly attached to the flange on the lower surface of the support ring beam of the heat collector by floating of the floating device 502, and after the flange is aligned, the square flange on the main oil top and the flange on the lower surface of the support ring beam of the heat collector are fastened together by a fastener; the rear surface of the sliding shoe 501 is connected 505 with a hydraulic crawler, and the sliding device is pushed by the hydraulic crawler 505 to slide. When slipping, the heat collector supporting ring beam is jacked up through the main oil jack 504, so that the supporting legs of the heat collector supporting ring beam leave the ground, and then the slipping boots 501 are pushed by the hydraulic crawler 505 to slip; the sliding distance is 500-700mm each time, a computer control system is used for monitoring whether the stroke and the load of each sliding device are consistent or not in the sliding process, the load of the sliding devices is basically consistent in one stroke, and the deviation is not more than 5%; and when the sliding of the stroke is finished once, the load and the stroke of the pushing device are adjusted through the computer control system, the synchronous action of the four sliding devices is ensured, and the operation is repeated until the heat collector slides to the position right below the in-place position in the tower.
The whole slipping process is as follows:
the technical scheme of the integral sliding is as follows: according to the combined weight of the 100MW photo-thermal heat collector, a sliding track and a supporting ring beam are designed, and a reasonable sliding device is selected. The combined weight of the heat collector is about 1800t, the diameter is 23.2m, the height is 38m, the supporting ring beam 149t, the sliding device 60t, the total weight of the equipment is 2009t, the safety factor is 1.3, and the total weight is calculated as 2612 t. The heat collector is supported by 12 temporary supporting legs, and the estimated pressure of the foundation is 181.7 t/square meter. 8 sets of sliding devices, wherein in the sliding process, the contact area of the sliding devices and the ground is 9.72 square meters, and the estimated pressure of the foundation is 269t per square meter. After the foundation is subjected to bearing treatment, the distance between every two square meters and the tracks is 16.1m, the diameter of the temporary support ring is 22.76m, the size of the taxiway is 0.81m, and the track foundation with the width of 1.2 m is more suitable for sliding operation.
The sliding process comprises the following steps:
1. assembly area selection and foundation treatment
A safe area is selected at the periphery of the heat absorption tower, a tower type solar-thermal power generation heat collector assembly area is set up, and a main channel is taken from the tower type solar-thermal power generation heat collector assembly area to the center of the heat absorption tower and serves as a sliding moving channel. The channel is used for avoiding safety risks such as high-altitude falling objects on the top of the tower under the condition of not influencing other construction progress of the heat absorption tower; and foundation treatment is needed to be carried out on the assembly area and the sliding channel of the tower type solar-thermal power generation heat collector. The foundation treatment is carried out according to the design requirements of figure 2, the concrete of the foundation cushion layer is C10, the rest is C30, the steel bars are not GRB-400, the concrete foundation is 150mm higher than the original ground, the longitudinal bars of the connecting beam extend into the track beam by 600mm, and the track beam extends into the tower body by 500 mm.
The foundation checking calculation comprises the following steps:
(1) checking calculation of the sliding track foundation;
(2) checking and calculating the ring beam foundation;
(3) checking calculation of the sliding track beam;
(4) checking and calculating a ring beam;
after the treatment, a sliding track is laid, 4 sets of sliding devices are arranged on the track, and each set of sliding device is provided with 2 sliding boots. The 4 sets of sliding devices are synchronously operated, and the heat collector is jacked up by the sliding devices and then slowly slides into the heat absorption tower
2. Support ring beam mounting
The support ring beam consists of 12 legs and one ring steel structure.
(1) And opening the box according to the mounting drawing of the supporting ring beam.
(2) Checking base lines and mounting position elevations of all the support legs: and determining the distance between the central line of the heat collector and the central line of the support ring beam to meet the requirement of site safety construction.
(3) The legs 12 were installed at the corresponding positions, and the dimensions between the legs were checked. The distance between the center lines of all the support legs and the center point of the support ring beam is 11383mm, and the distance between the centers of the adjacent support legs is 4441 mm.
(4) The supporting ring beam assembly is arranged on the upper part of the corresponding supporting leg and connected with the corresponding bolt, and the upper supporting ring beam assembly is checked for high-force errors. If the mutual elevation deviation is more than 2 mm, adjustment is necessary.
(5) And (4) sequentially installing the rest support ring beam assemblies in place according to the hoisting installation and adjustment, connecting all the bolts, and rechecking the elevation and the whole size. The height difference should not be greater than 2 mm.
(6) Installation of a central connecting beam: and the connecting beam in the supporting ring beam and the corresponding connecting bolt are installed according to the drawing.
(7) All connecting bolts of the supporting ring beam are fastened in advance and checked at the elevation and distance: the integral size of the supporting ring beam is ensured to meet the requirements in the bolt tightening process, and the elevation of the upper part of the supporting ring beam is required to meet the requirements.
3. Heat collector assembly
And (4) gradually installing all the components of the heat collector according to the technical specification of a manufacturer and the requirement of an installation technical scheme, and checking and accepting to be qualified.
4. Preparation conditions before slip
After the ground combination of the steel structure, the equipment and the pipeline of the heat collector is checked and accepted, the heat collector integrally slides to the position right below the in-place position in the heat collecting tower. The sliding equipment and system comprises a supporting ring beam, 4 sliding devices and 1 set of computer control system, wherein each set of sliding device comprises a floating device, 2 sliding shoes, 1 main jack and other connecting accessories. The bottom of the floating device is connected with the sliding boot in a floating mode, the bottom of the sliding boot is made of stainless steel, the part, in contact with the sliding track, of the bottom of the sliding boot is installed in the sliding track, and the sliding track is provided with a polytetrafluoroethylene or high-density polyethylene cushion block. A central main jack SWL =600 tons is mounted on the floating device body.
The propulsion systems are equipped with power units that provide sufficient pressure and flow to achieve the designed taxi speed, and each propulsion system is equipped with brakes. Each propulsion unit is equipped with a control box (containing hydraulic valves, connections, etc.) able to collect the following data: master cylinder pressure load, master cylinder stroke, push/pull cylinder pressure (load); push/pull cylinder stroke, side shift system. All of this data is sent to the computer system for controlling and monitoring the loading, vertical and horizontal displacement, actual center of gravity condition, propulsion stroke, etc. of each skid system assembly.
5. Correlation calculation in slip process
(1) Slipping boot calculation
And (4) calculating under the conditions that the maximum wind power is 10m/s, the weight of the heat collector is increased by 10% and the center of gravity is shifted by 0.5m in the sliding process.
(2) Wind and brake force calculation
Wind power calculation: the heat collector can be regarded as a cylinder consisting of 16 polygons, the wind receiving surface is 21 multiplied by 35=735 square meters, and the resistance coefficient of the shape is 1.3;
assuming that the maximum allowable wind speed at the upper part of the tower is 10m/s, the basic wind pressure is as follows:
PW=C²/16=6.25kgf/m²
the total wind power for the maximum permissible wind speed is therefore (safety factor 1.5):
H1,d=0.00625×1.3×735×1.5=9mT
and (3) calculating braking force: the friction coefficient of the polyethylene plate in the sliding rail is 0.05, and the safety coefficient of the friction force is increased by 1.5 times, which is equivalent to that of a heat collector;
the weight is increased by 10%, and the braking force is as follows:
H2,d=0.05×1.5×735×1786.4=134mT
overturning and eccentricity under the action of wind power and braking force
Total stress: h = H1, d + H2, d =9+134=143mT
Horizontal moment: MT, d = 143X 19.814 =2833.4 square meter T
Increased eccentricity under this force: e = MT, d/WT, d =2833.4/1786.4=1.5m, and the force of the heat collector is 1.5m after eccentricity. The maximum stress of the sliding shoe is 564mT < the rated load of the sliding shoe is 600 mT.
6. Mounting of sliding rail
(1) The track is composed of: the heat collector sliding track is composed of two parallel sliding rails, the number of the sliding rails of each line is 19, the length of each sliding rail is 5.4m, and the total length of a single sliding rail is 102.9 m.
(2) Rail mounting mode
The tracks are directly laid on the surface of the concrete foundation by using the tower crane, and after alignment and acceptance, each track is fixed on the foundation by using four clamping blocks and bolts.
(3) The standard of the parameters of the sliding track,
number of slide rails per line (length =5.4 m each): 19
The distance between the sliding tracks: 16098 + -1.5 mm
Maximum cross slope: plus or minus 0.1 percent
Maximum longitudinal slope: plus or minus 0.5 percent
Maximum longitudinal clearance between two slide rails: 10 mm
Maximum plane deviation of two slide rails: 1mm
Maximum gap (vertical) between two slide rails: 1mm
7. Installation of sliding boots
The bottom floating plate of the sliding device is arranged in the sliding track, the bottom floating plate is used for hoisting the main oil top until the square flange on the oil top is tightly attached to the flange on the lower surface of the annular beam of the heat collector, the sliding device is adjusted, so that the oil top flange is opposite to the flange on the bottom plate of the supporting ring beam-shaped beam, and the oil top flange is connected and finally tightened by using bolts.
8. Jacking heat collector
Once the propulsion unit is placed under the support ring beam, the propulsion unit jacks are raised until they contact the ring beam flanges to be bolted. Then the integral unit formed by the heat collectors is jacked up.
(1) A propulsion device (SWL =600 ton) is inserted between the 4 jacking points. The propulsion means are provided by the master cylinder only;
the working height of the propulsion device is 1410 mm (the minimum theoretical height of the propulsion device =1390 mm)
(2) The jack is jacked and fixed on the ring beam
(3) The stroke of the main jack is 90mm after 1500mm is formed;
(4) gradually loading by using a jack, and gradually increasing according to 20% of the expected load until the expected load is reached; the support ring beam and the MSR are checked for abnormal deformation and rated load, and if the limit value is reached, the adjustment is immediately carried out.
(5) The expected final load 436t of the jack, maximum all loads 510 t.
(6) Carefully checking that the concrete slab and the ring have no deformation;
(7) the support should be bolted to the ring and connect all the components to the ring.
(8) Ensuring that all bolts between each sliding surface are fixed.
9. Micro-adjusting trial slippage
Since the position of the MSR is not 79m as described in the construction solution, but actually 86.5m, the tail bracket is not within the range of the center of the tail slipper, and thus a 300mm slip is required.
10. Formal slip
If the slippage is not problematic, starting the slippage devices, wherein the slippage distance is 600mm each time, monitoring whether the stroke and the load of each slippage device are consistent or not by using a computer control system in the slippage process, wherein the load of the slippage devices is basically consistent in one stroke, and the deviation is not more than 5%; and when the sliding of the stroke is finished once, the load and the stroke of the pushing device are adjusted through the computer control system, the synchronous action of the four sliding devices is ensured, and the operation is repeated until the heat collector slides to the position right below the in-place position in the tower.
Slip process monitoring measures:
(1) monitoring the stroke and the load of the sliding boots according to a computer control system to ensure the synchronous action of the four sliding boots;
(2) monitoring the verticality of the collector body by using a theodolite in a sliding process;
(3) and in the sliding process, a high-precision level gauge is utilized to measure the real-time sinking amount of the sliding foundation, so that the sliding safety is ensured, and if the slipping safety exceeds the overturning safety standard, the slipping safety is reported to a related designer to evaluate the actual situation on site.
(4) And monitoring the wind speed on site in real time in the slippage process, and stopping slippage when the wind speed exceeds the standard requirement.
During the whole sliding process, the following points are mainly noted:
1. jacking operation
(1) 1 surveyor checked the deflection and levelness of the collector during jacking and slipping;
(2) each skate would have a team of 3 people, consisting of 1 team leader and 2 team member workers.
(3) Before jacking operation, a surveyor and a total station are positioned at a proper position to see the four supports.
(4) During the jacking operation, the surveyor should confirm that the MSR is level at all stages of jacking. And according to the confirmation, the master command continues to command to carry out jacking operation until the final position is reached.
(5) In this process, all other team members should check whether there is an obstacle or a leak in the system. If found, the stop job should be reported to the commander.
(6) After the jacking process is finished, the general command waits for a measurer to send a green signal, so that the sliding operation can be carried out.
2. Trial slippage
(1) The worker should start spraying a soap solution on the sliding plate in front of each shoe.
(2) After the jacking operation is finished, the 300mm sliding operation is finished.
(3) After sliding to 300mm, the collector assembly should be lowered on the sliding track.
(4) The levelness of the collector is checked by a surveyor after the load is released.
(5) The necessary fixed non-slip mat should be placed.
(6) Once the load is released, the skid shoe of the tail should be readjusted to match the center of the collector tail support. Once mated, the team member will bolt the rear bracket to the web as directed by the general command.
3. Formal slip
(1) Each team member should look for loose wires or cables that may affect slippage during slippage.
(2) All loose cables or wires should be immediately communicated to the group leader and lifted and secured in place on the skid shoes or on the strap between the skid shoes.
(3) Before beginning to skid, each worker should clean the rail and make it clean using compressed air or a vacuum cleaner.
(4) After cleaning, a soap solution should be sprayed on the sliding plate to smooth it during the sliding process.
(5) When the collector reaches a position where the sliding panel is not available, the operator should immediately retrieve the sliding panel from the tail of the track, clean it, and start the installation at the front.
(6) After the installation is completed, the worker should continue to spray the soap solution on the sliding plate and continue to slide.
(7) Each crew must ensure that the pad is at the level of the shoe base and if the slide plate is not at the proper level or protruding, the master command is immediately notified and the job is stopped.
(8) During the sliding operation, the group leader timely requires the surveyor to check the levelness of the collector.
The above listed embodiments are only for clear and complete description of the technical solution of the present invention with reference to the accompanying drawings; it should be understood that the embodiments described are only a part of the embodiments of the present invention, and not all embodiments, and the terms such as "upper", "lower", "front", "back", "middle", etc. used in this specification are for clarity of description only, and are not intended to limit the scope of the invention, which can be implemented, and the changes or modifications of the relative relationship thereof are also regarded as the scope of the invention without substantial technical changes. Meanwhile, the structures, the proportions, the sizes, and the like shown in the drawings are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the conditions under which the present invention can be implemented, so that the present invention has no technical essence, and any structural modification, changes in proportion relation, or adjustments of the sizes, can still fall within the range covered by the technical contents disclosed in the present invention without affecting the effects and the achievable purposes of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention has the advantages that:
according to the invention, after the tower type photo-thermal power generation heat collector is integrally installed on the ground, the heat collector slides to the center in the heat absorption tower, and the floating sliding shoe is utilized to ensure the stability in the sliding process, so that the integral sliding can be realized, the installation time is saved, and the installation quality can be improved; the following advantages are mainly provided:
1. according to the invention, the tower type photo-thermal power generation heat collector is integrally slid into the heat absorption tower through the plurality of sets of sliding devices synchronously, and is integrally hoisted through the gantry in the tower hydraulically, so that the problems of abnormally high weight and height of the assembly after the 100MW tower type photo-thermal heat collector is combined, and difficulty in integral sliding and hoisting are solved;
2. the floating type sliding device is used for supporting the sliding support ring beam of the heat collector only when the heat collector slides integrally, and the foundation before sliding needs to be redesigned and processed, so that the prerequisite condition of stable sliding of the super-large assembly is provided;
3. when the whole body slides, a sliding method is optimized, the command is coordinated uniformly, and the risk that the component deflects and even topples due to external force and improper operation of the component in the sliding process is solved;
4. through the floating type sliding boots, the supporting mode of the sliding supporting ring beam of the heat collector by the sliding boots can be more stable, the problem that installation is not smooth due to the fact that the sliding boots and the oil filling top of the supporting ring beam are uneven is solved, the technical problem of heavy-load sliding is solved through a hoisting method of unified coordination command, and the sliding safety of equipment is improved.
Claims (10)
1. A slippage method for a megawatt tower type photo-thermal power generation heat collector is characterized by comprising the following steps: firstly, establishing a heat absorption tower on the ground at the position where the tower type photo-thermal power generation heat collector is installed, and reserving an internal space for hoisting the tower type photo-thermal power generation heat collector inside the heat absorption tower according to the size of the tower type photo-thermal power generation heat collector; then integrally assembling the tower type photo-thermal power generation heat collector on the ground; and the assembled tower type photo-thermal power generation heat collector integrally slides to the center in the heat absorption tower from an assembly site by using a sliding device through a sliding channel.
2. The slippage method for the megawatt tower type photo-thermal power generation heat collector as claimed in claim 1, wherein: the method is characterized in that the tower type photo-thermal power generation heat collector is assembled on the ground, namely a tower type photo-thermal power generation heat collector assembling area is arranged in a safe area at the periphery of a heat absorption tower, a heat collector support ring is manufactured in the tower type photo-thermal power generation heat collector assembling area, the heat collector support ring is composed of a plurality of support legs and an annular steel structure, and the heat collector support ring is supported on the hardened ground of the tower type photo-thermal power generation heat collector assembling area through; and then, carrying out ground assembly on the tower type solar-thermal power generation heat collector on the heat collector support ring according to the assembly requirement of the tower type solar-thermal power generation heat collector, and well installing all parts of the tower type solar-thermal power generation heat collector.
3. The slippage method for the megawatt tower type photo-thermal power generation heat collector as claimed in claim 2, wherein: the ground assembly of the tower type photo-thermal power generation heat collector is that all parts of the tower type photo-thermal power generation heat collector are combined on the support ring, and the ground inspection acceptance is qualified after the assembly is finished, so that the tower type photo-thermal power generation heat collector meets the requirements of sliding and lifting.
4. The slippage method for the megawatt tower type photo-thermal power generation heat collector as claimed in claim 1, wherein: the ground construction of the sliding channel from the assembly field to the inner center of the heat absorption tower is characterized in that a main channel is arranged from the assembly area of the tower type photo-thermal power generation heat collector to the inner center of the heat absorption tower and serves as a sliding moving channel, and a sliding track is laid on the sliding moving channel; 4 sets of sliding devices are arranged on the sliding tracks, and the heat collector support ring is arranged on the sliding devices; after all the components of the heat collector are combined on the support ring, the support ring provided with the tower type photo-thermal power generation heat collector is integrally slid to the center inside the heat absorption tower through the sliding device.
5. The slippage method for the megawatt tower type photo-thermal power generation heat collector as claimed in claim 4, wherein: the support ring provided with the tower type photo-thermal power generation heat collector integrally slides to the center inside the heat absorption tower through the sliding devices, namely the sliding devices arranged below the support ring of the heat collector synchronously slide in sections, and the support ring provided with the tower type photo-thermal power generation heat collector integrally slides to the center inside the heat absorption tower; the sliding device is a sliding shoe provided with a floating plate, the bottom of the sliding shoe is provided with the floating plate, the bottom of the floating plate is made of stainless steel, the floating plate is arranged in a sliding track, and the sliding track is provided with a polytetrafluoroethylene or high-density polyethylene cushion block; the floating plate is provided with a main oil top, a square flange on the main oil top is tightly attached to a flange on the lower surface of the heat collector supporting annular beam, and the position of the sliding device is adjusted to ensure that the flange of the main oil top is opposite to the bottom of the supporting annular beam.
6. The slippage method for the megawatt tower type photo-thermal power generation heat collector as claimed in claim 5, wherein: the rear surface of the sliding shoe is connected with a hydraulic crawler, and the sliding device is pushed by the hydraulic crawler to slide; when slipping, the heat collector support ring is jacked up through the main oil, so that the supporting legs of the heat collector support ring are separated from the ground, and then the slipping device is pushed to slip through the hydraulic crawler; the sliding distance is 500-700mm each time, a computer control system is used for monitoring whether the stroke and the load of each sliding device are consistent or not in the sliding process, the load of the sliding devices is basically consistent in one stroke, and the deviation is not more than 5%; and when the sliding of the stroke is finished once, the load and the stroke of the pushing device are adjusted through the computer control system, the synchronous action of the four sliding devices is ensured, and the operation is repeated until the heat collector slides to the position right below the in-place position in the tower.
7. The slippage method for the megawatt tower type photo-thermal power generation heat collector as claimed in claim 2 or 4, wherein: the foundation of the assembly area and the sliding moving channel needs to be calculated and designed according to the weight of the tower type photo-thermal power generation heat collector so as to meet the bearing requirement of the ultra-large and overweight component, and the assembly area and the sliding moving channel are used as main areas for combination and sliding of the heat collector.
8. A megawatt tower type solar-thermal power generation heat collector sliding system device comprises a heat collector support ring, a sliding device and a sliding track; the sliding device is installed on the sliding rail, the sliding rail extends to the inside of the center of the heat absorption tower from the assembly area of the tower type photo-thermal power generation heat collector, where the heat collector support ring is installed with the tower type photo-thermal power generation heat collector, the heat collector support ring is placed on the sliding device when sliding, and the sliding devices synchronously slide to enter the inside of the center of the heat absorption tower.
9. The megawatt-level tower-type photothermal power generation collector slipping system device according to claim 7, characterized in that: the sliding device comprises sliding shoes provided with floating plates, the whole sliding system comprises 4 sliding devices, each sliding device is provided with two sliding shoes, each sliding shoe supports one floating device, and the floating devices are in floating connection with the sliding shoes to form the floating sliding device capable of adjusting the horizontal plane.
10. The megawatt-level tower-type photothermal power generation collector slipping system device according to claim 9, characterized in that: the bottom of the sliding shoe is made of stainless steel, the stainless steel part of the sliding shoe is arranged in the sliding track, and a polytetrafluoroethylene or high-density polyethylene cushion block is arranged on the sliding track to form the sliding shoe with small friction resistance; the floating device is provided with a main oil top, the main oil top flange is opposite to the bottom of the support ring beam by adjusting the position of the sliding device, the square flange on the main oil top is tightly attached to the flange on the lower surface of the sliding support ring beam by floating the floating device, and the square flange on the main oil top and the flange on the lower surface of the sliding support ring beam are fastened together by a fastener after being aligned; the rear surface of the sliding boot is connected with a hydraulic crawler, and the sliding device is pushed by the hydraulic crawler to slide.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113756589A (en) * | 2021-10-11 | 2021-12-07 | 上海电气集团股份有限公司 | Tower-type solar heat collector and modular installation method of platform in tower |
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