A heat absorber sliding device

Abstract

The present invention provides a slip device for a heat absorber, comprising: a heat absorber slip track (1) composed of two parallel slide rails, a support ring beam (4), multiple slip shoes (2), a propulsion system (3) and a computer control system. The slip track (1) is fixed to the ground through a limit clamp, and the limit clamp is fixed in a concrete foundation by bolts. The support ring beam is arranged at the bottom of the heat absorber to support the entire heat absorber. There are 4 slip shoes (2), symmetrically distributed on the support ring beam. Each slip shoe (2) includes a floating device (21), 1 central main jack (22), and 2 auxiliary jacks as connecting accessories. The bottom of the floating device (21) is made of stainless steel and is installed in the slip track (1). The central main jack (22) is installed on the main body of the floating device (21). The propulsion system (3) is equipped with a power device, a brake and a control box. The computer control system monitors the stroke and load of the slip shoes to ensure the synchronous operation of the four slip shoes.

Description

Technical Field

[0001] The present invention relates to the technical field of absorber installation, in particular to an absorber sliding device. Background Art

[0002] Tower molten salt solar thermal power generation technology has been largely commercialized due to its advantages of high concentration ratio, high photothermal conversion efficiency, continuous power generation at night, and self-peak regulation.

[0003] The main construction areas of a solar thermal power station are divided into a mirror field area and a power island area. Among them, the power island area is the core of the entire power station. All regular solar energy will be collected into the absorber on the light tower, the core building of the power island, so as to convert solar energy into the heat energy of molten salt. When the molten salt exchanges heat with water, steam is generated to generate electricity. The light tower is a high-rise building, generally with a height of more than 190m. The difference from the chimney of a conventional thermal power plant is that it is a comprehensive structure integrating structure, equipment, pipelines, heat insulation, heat absorption, building elevators, etc., and the construction difficulty is great.

[0004] After the ground combination acceptance of the absorber steel structure, equipment and pipelines is completed, the absorber needs to be integrally moved to directly below the in-place position inside the absorber tower. Most of the existing mechanisms and equipment construction rely on external tower cranes for hoisting. Special power conversion equipment needs to be purchased to transport the absorber to below the absorber steel frame. Generally, the absorber is relatively tall and the total weight of the absorber is large. It is usually combined directly on the support ring beam supplied by the absorber manufacturer. Therefore, adding the weight of the support ring beam, the total moving weight is very large, and it is very difficult to ensure safety and reliability during the transportation process. All kinds of detailed problems of the selection and installation of the transfer equipment need to be comprehensively demonstrated and planned, and it is difficult to obtain a scientific, reasonable and economical mechanical equipment and installation plan, thus slowing down the construction progress of the light tower and resulting in extremely high construction costs.

[0005] Therefore, it is necessary to study a new absorber sliding device to efficiently and reliably complete the transportation of the absorber from the assembly plant to the light tower, and finally the transfer position is accurate and the construction cost is low, so as to solve one or more of the above technical problems. Summary of the Invention

[0006] In order to solve one or more technical problems in the prior art, the present invention provides an absorber sliding device, which is characterized by including:

[0007] An absorber sliding track (1) composed of two parallel slide rails, a support ring beam, multiple sliding shoes (2), a propulsion system (3) and a computer control system; the number of slide rails in each line of the slide rails is 19, each with a length of 5.4m, and the total length of a single track is 102.9m; the sliding track 1 is fixed on the ground by a limit card, and the limit card is fixed in the concrete foundation by bolts.

[0008] According to another aspect of the present invention, the support ring beam is arranged at the bottom of the heat absorber to support the entire heat absorber.

[0009] According to another aspect of the present invention, there are 4 sliding shoes (2), which are symmetrically distributed on the support ring beam. Each sliding shoe (2) includes a floating device (21), 1 central main jack (22), and 2 auxiliary jacks as connection accessories.

[0010] According to another aspect of the present invention, the bottom of the floating device (21) is made of stainless steel and is installed in the sliding track (1). The sliding track (1) is provided with polytetrafluoroethylene or high-density polyethylene pads, and the central main jack (22) is installed on the main body of the floating device (21).

[0011] According to another aspect of the present invention, the floating device is a floating plate. The floating plate is installed in the sliding track, and the bottom floating plate hoists the main oil jack until the upper flange of the oil jack is closely attached to the lower surface flange of the support ring beam of the heat absorber. Adjust the sliding device to make the upper flange of the oil jack face the bottom flange of the support ring beam, and use bolts for connection.

[0012] According to another aspect of the present invention, there are multiple propulsion systems (3). Each propulsion system is equipped with a power device, a brake, and a control box. The power device provides sufficient pressure and flow rate to reach the designed sliding speed. The brake is used for braking the propulsion system (3). The control box includes a control box body, sensors, hydraulic valves, and connecting parts. The hydraulic valves are connected to the box body through the connecting parts. The sensors are placed inside the control box body and are used to collect the following data during the operation of the heat absorber sliding device: main cylinder pressure load, main cylinder stroke, push / pull cylinder pressure or load, push / pull cylinder stroke, and side shift system. The sensors send the data to the computer system through cables or wirelessly to control and monitor the load, vertical and horizontal displacements, actual center of gravity situation, and / or propulsion stroke of the heat absorber sliding device.

[0013] According to another aspect of the present invention, the computer control system monitors the stroke and load of the sliding shoes to ensure the synchronous operation of the four sliding shoes.

[0014] According to another aspect of the present invention, it further includes a theodolite, which is connected to the bottom of the heat absorber body and is used to continuously monitor the verticality of the heat absorber body by using the theodolite during the sliding process.

[0015] According to another aspect of the present invention, it further includes a high-precision level, which is connected to the bottom of the heat absorber body and is used to measure the real-time subsidence amount of the sliding foundation by using the high-precision level during the sliding process to ensure the safety of sliding.

[0016] According to another aspect of the present invention, a wind speed meter is further included, which is connected to the bottom of the heat absorber body and is used to monitor the on-site wind speed in real time during the sliding process. When the wind speed exceeds the standard requirements, the sliding is stopped.

[0017] Compared with the prior art, the present invention has one or more of the following technical effects:

[0018] 1) The sliding device used has a simple structure, and the hoisting components are small in volume and light in weight, which can ensure safe construction and the construction process is simple;

[0019] 2) When the total moving weight is very large, various detailed problems of the selection and installation of transfer equipment do not need to be considered. Thus, a scientific, reasonable and economical mechanical equipment and installation plan can be obtained through the sliding method, improving the construction progress of the optical tower and significantly reducing the construction cost.

[0020] 3) It can efficiently and reliably complete the transportation of the heat absorber from the assembly plant to the optical tower, and the final transferred position is accurate. It can be calculated and controlled according to the actual working conditions, and the equipment parameters can be adjusted in real time, with high flexibility.

[0021] 4) The sliding structure of the heat absorber is applied to the heat absorber and then the whole is slid and hoisted. The overall sliding hoisting plan can reduce the high-altitude operation process and reduce the risk of falling from height. Since the working time on the tower is greatly shortened, the cross-operation with the tower bottom is reduced. The overall sliding hoisting construction plan saves 220 days compared with the traditional high-altitude scattered assembly (construction period advantage), reduces the use time of a large number of large hoisting equipment and labor costs, overall improves the ground assembly of all components, reduces a large number of high-altitude operations, and reduces the input of construction personnel. The input of construction personnel is reduced by 3900 person-days compared with the conventional method, and the cost is also significantly reduced accordingly, and the construction difficulty is reduced (cost advantage). BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to understand the details of the above features of the present invention, reference may be made to the embodiments to obtain a more detailed description of the invention briefly summarized above. The drawings relate to the preferred embodiments of the present invention and are described as follows:

[0023] Figure 1 It is a schematic structural diagram of a heat absorber sliding device according to a preferred embodiment of the present invention;

[0024] Figure 2 It is a schematic structural diagram of a heat absorber sliding track adopting a preferred embodiment of the present invention;

[0025] Figure 3 It is a schematic structural diagram of a fixing method of a heat absorber sliding track according to a preferred embodiment of the present invention;

[0026] Figure 4 It is a schematic structural diagram of a fixing method of a limit card fixed on a concrete foundation according to a preferred embodiment of the present invention;

[0027] Figure 5 Fixed detail drawing of the sliding track according to the preferred embodiment of the present invention;

[0028] Figure 6 Schematic diagram of the support ring beam structure according to the preferred embodiment of the present invention;

[0029] Figure 7 Schematic diagram of the sliding shoe structure according to the preferred embodiment of the present invention.

[0030] Figure 8 Horizontal schematic diagram of the absorber sliding along the horizontal track according to the preferred embodiment of the present invention.

[0031] Figure 9 Vertical schematic diagram of the absorber sliding along the horizontal track according to the preferred embodiment of the present invention.

[0032] Reference numerals:

[0033] 1 - Absorber sliding track; 2 - Sliding shoe; 21 - Floating device; 22 - Central main jack; 3 - Propulsion system; 4 - Support ring beam; 5 - Absorber; Specific embodiments

[0034] Now, various embodiments will be described in detail. One or more examples of these embodiments are respectively shown in the figures. Each example is provided in an explanatory manner and is not meant to be limiting. For example, features shown or described as part of one embodiment can be used in or combined with any other embodiment to yield another embodiment. The present invention is intended to embrace such modifications and variations.

[0035] In the following description of the figures, the same reference numerals indicate the same or similar components. Generally, only the differences between individual embodiments will be described. Unless otherwise clearly specified, the description of a part or aspect of one embodiment can also be applied to the corresponding part or aspect of another embodiment.

[0036] As Figure 1 shown, to solve one or more technical problems in the prior art, the present embodiment provides an absorber sliding device, including:

[0037] The absorber sliding track 1 composed of two parallel slide rails, the support ring beam 4, multiple sliding shoes 2, the propulsion system 3, and the computer control system. Refer to Figure 2 , the absorber sliding track is composed of two parallel slide rails. The number of slide rails in each line is 19, each with a length of 5.4 m, and the total length of a single track is 102.9 m.

[0038] Refer to Figure 3, the sliding track 1 is fixed to the ground by a limit clamp. Refer to Figure 4 , and the limit clamp is fixed in the concrete foundation by bolts. Figure 5 The following shows the fixing details of the sliding track. The limit clamp used is of type I, with a quantity of 160. The limit clamp and the concrete raft slab are connected by 8.8 grade M20*50mm screws and washers. There is a standard sleeve under the screw. Concrete steel bars are arranged inside the concrete foundation where the limit clamp is located. The standard sleeve is used to make the combination of the screw and the concrete foundation tighter, and the FISCHER EA II M20 LT80 model is adopted. The bolt grade is 8.8. Once the bolt is removed, a plastic cap needs to be installed. The diameter of the hole of the bolt on the CLS board is 24mm, and the depth of the hole is 85mm. The material of the limit clamp is S355J0EN10025. The weight of each limit clamp is 12.6kg. Non-destructive flaw detection needs to be carried out before using the limit clamp. 100% is visually inspected, and 30% of them are inspected by LP or magnetic particle flaw detection.

[0039] As Figure 6 shown, the support ring beam 4 is arranged at the bottom of the heat absorber and is used to support the whole heat absorber. In this embodiment, the total weight of the ring beam is 1846.7 mt. The center is the location of the center of gravity when there is no wind load and no braking. If there are wind loads and braking occur, the center of the support ring beam will change. The detailed method for calculating and determining the center of gravity will be introduced later.

[0040] As Figure 7 shown, there are 4 sliding shoes 2, which are symmetrically distributed on the support ring beam. Each sliding shoe 2 includes a floating device 21, 1 center main jack 22, and 2 auxiliary jacks. The sliding of this embodiment is not used, so the connecting accessories are not shown in the figure. The bottom of the floating device 21 is made of stainless steel and is installed in the sliding track 1. There are polytetrafluoroethylene or high-density polyethylene pads on the sliding track 1. The center main jack 22 is installed on the main body of the floating device 21, and the weight SWL of the center main jack 22 is 600 tons. In this embodiment, the floating device is a floating plate. The bottom floating plate of the sliding device is installed in the sliding track. The bottom floating plate hoists the main oil jack until the upper flange of the oil jack is tightly pressed against the lower surface flange of the heat absorber support ring beam. Adjust the sliding device to make the upper flange of the oil jack face the bottom flange of the support ring beam, and connect them with M30×140mm bolts and tighten them finally.

[0041] According to another aspect of the present invention, the propulsion system 3 has multiple units, each propulsion system being equipped with a power device, a brake, and a control box. The power device provides sufficient pressure and flow rate to achieve the designed gliding speed. The brake is used for braking the propulsion system 3. The control box includes a control box body, sensors, hydraulic valves, and connectors. The hydraulic valves are connected to the box body through the connectors. The sensors are placed inside the control box body and are used to collect the following data during the operation of the absorber sliding device: master cylinder pressure load, master cylinder stroke, push / pull cylinder pressure or load, push / pull cylinder stroke, and side shift system. The sensors send the data to the computer system via cables or wirelessly to control and monitor the load, vertical and horizontal displacements, actual center of gravity situation, and / or propulsion stroke of the absorber sliding device.

[0042] The usage method and working principle of this absorber sliding device:

[0043] I. Installation of the absorber sliding track 1

[0044] 1. Inspection and confirmation conditions before track installation:

[0045] 1 The sliding track foundation has been constructed and passed the acceptance.

[0046] 2 The track foundation alignment has been completed and passed the acceptance.

[0047] 3 The quantity check and quality acceptance of the track materials and accessory equipment are qualified.

[0048] 4 The track bearing load calculation book, the track foundation and the track are designed according to the requirements of the absorber sliding, and the foundation has passed the acceptance organized by units such as the general contractor during the handover of safety, and there is no need to conduct endurance tests on the track with on-site counterweights.

[0049] 2. Installation and standards of the absorber sliding track 1

[0050] 1) Track composition: The absorber sliding track consists of two parallel slide rails. The number of slide rails for each line is 19, and the length of each is 5.4 m. The total length of a single track is 102.9 m.

[0051] 2) Track installation method: The track is directly laid on the concrete foundation surface by a tower crane. After alignment and acceptance, each track is fixed to the foundation using four blocks and bolts.

[0052] 3) Sliding track parameter standards

[0053] Number of slide rails per line Each length = 5.4 m: 19 Slide rail spacing: 16098 ± 1.5 mm

[0054] Maximum cross slope: ±0.1% Maximum longitudinal slope: ±0.5%

[0055] The maximum longitudinal gap between the two slide rails: 10 mm

[0056] The maximum planar deviation of the two slide rails: 1 mm

[0057] The maximum vertical gap between the two slide rails: 1 mm

[0058] The track foundation is designed according to the load calculation during the sliding process of the heat absorber. The load of the track is not checked on-site. Only the foundation is dimensionally inspected and then the track is installed. The track dimensions are inspected according to the above parameters.

[0059] II. Installation of the sliding shoes

[0060] The bottom floating plate of the sliding device is installed in the sliding track. The main oil jack is hoisted on the bottom floating plate until the upper flange of the oil jack is closely attached to the lower surface flange of the annular beam of the heat absorber. Adjust the sliding device to make the flange of the oil jack directly face the flange of the bottom plate of the supporting annular beam, and connect them with bolts of M30×140 mm and tighten them finally.

[0061] III. Sliding process of the heat absorber sliding device

[0062] After checking and confirming that the installation position of the sliding device is correct, the central main jack 22 can be jacked up until it touches the flange of the supporting ring beam 4. The four sliding and lifting devices are operated by 1 control system to ensure that the hydraulic lifting devices act simultaneously and lift the heat absorber horizontally.

[0063] 1. Start the lifting device to lift the supporting ring beam and the heat absorber together. The load of the hydraulic lifting device increases in increments of 20% until it reaches 100% load; carefully check the deformation conditions of the track concrete foundation, the track, and the supporting ring beam, and the bolt connection status between the annular beam and the lifting device, and make relevant records;

[0064] 2. Start the 4 hydraulic lifting devices to lift the supporting ring beam and the heat absorber by 200 mm simultaneously, and then start the sliding device. The sliding distance each time is 600 mm. During the sliding process, use the computer control system to monitor whether the stroke and load of each sliding device are consistent. The load of the sliding device should basically remain consistent within one stroke, and the deviation shall not be greater than 5%; after each stroke of sliding, adjust the load and stroke of the pushing device through the computer control system to ensure that the four sliding devices act synchronously. Repeat the above operations until the heat absorber slides to directly below the in-tower installation position.

[0065] IV. Related calculations during the sliding process

[0066] 1. Calculation of the sliding shoes

[0067] Calculation under the condition that the maximum wind speed during the sliding process is 10 m / s, the weight of the heat absorber increases by 10%, and the center of gravity shifts by 0.5 m:

[0068] 1) Absorber slip geometry

[0069] 2) Wind force and braking force calculation

[0070] A. Wind force calculation

[0071] This absorber can be regarded as a cylinder composed of 16 polygons, and the windward area is 21×35 = 735 m 2 , and the drag coefficient of this shape is 1.3;

[0072] Assuming the maximum allowable wind speed is 10 m / s, the wind force can be calculated by the following formula:

[0073] MSR (absorber) can be regarded as a multi-faceted cylindrical column with 16 faces, and the windward area is approximately 21*35 = 735 m 2 Looking up the table, the drag coefficient of this shape is 1.3:

[0074] Assuming the maximum allowable wind speed at the top of the tower is 10 m / s, the basic wind pressure is:

[0075] P W =C 2 / 16 = 6.25 kgf / m 2 , so the total wind force at the maximum allowable wind speed with a safety factor of 1.5 is: H1,d = 0.00625×1.3×735×1.5 = 9 mT

[0076] B. Braking force calculation

[0077] The friction coefficient of the polyethylene board in the slip track is 0.05. Assuming a safety factor of 1.5 times the increase in friction force, which is equivalent to a 10% increase in the weight of the absorber, the braking force is:

[0078] H2,d = 0.05×1.5×735×1786.4 = 134 mT

[0079] C. Under the action of wind force and braking force, the total force of overturning and eccentricity:

[0080] H = H1,d + H2,d = 9 + 134 = 143 mT

[0081] Horizontal moment: MT,d = 143×19.814 = 2833.4 m 2 T

[0082] The increased eccentricity under this force:

[0083] e = MT,d / WT,d = 2833.4 / 1786.4 = 1.5 m,

[0084] After the eccentricity of 1.5 m, the force size distribution of the absorber changes:

[0085] Right vertical line redistribution coefficient: CD = 9864 / 16098 = 0.613

[0086] Upper horizontal line redistribution coefficient: BC = 8298 / 16098 = 0.515

[0087] Left vertical line redistribution coefficient: AB = 1 - 0.613 = 0.387

[0088] Lower horizontal line redistribution coefficient: AD = 1 - 0.515 = 0.485 Force on each sliding shoe: R A = 0.387×0.485×1786.4 = 335.3 mT

[0089] R B = 0.387×0.515×1786.4 = 356.0 mT

[0090] R C = 0.613×0.515×1786.4 = 564.0 mT

[0091] R D = 0.613×0.485×1786.4 = 531.1 mT

[0092] The maximum force on the sliding shoe is 564 mT < the rated load of the sliding shoe 600 mT, qualified.

[0093] 2. The track foundation and track are designed according to the relevant parameters of the absorber sliding. In this embodiment, the track does not need to be calculated. Only after the foundation and track are completed, the acceptance is carried out according to the standard parameters of the track

[0094] for acceptance.

[0095] V. Monitoring measures during the sliding process:

[0096] 1. Monitor the stroke and load of the sliding shoes according to the computer control system to ensure the synchronous movement of the four sliding shoes;

[0097] 2. Monitor the verticality of the absorber body in real time by using a theodolite during the sliding process;

[0098] 3. Measure the real-time settlement of the sliding foundation by using a high-precision level during the sliding process to ensure the sliding safety. If it exceeds the overturning safety standard, it should be reported to the relevant design party for evaluating the actual situation on site.

[0099] 4. Monitor the on-site wind speed in real time during the sliding process. When the wind speed exceeds the standard requirements, stop the sliding.

[0100] While the foregoing is about embodiments of the present invention, other and further embodiments of the present invention can be designed without departing from the basic scope of the present invention, and the scope of the present invention is determined by the following claims.

[0101] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the present invention. The technical features that do not conflict with each other in these embodiments can be combined with each other. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A heat absorber sliding device, used for the overall sliding hoisting of the heat absorber, characterized in that: include: The sliding track consists of two parallel slide rails, which are fixed to the ground by limit clamps. The limit clamps are fixed to the concrete foundation by bolts. The track foundation and sliding track are designed according to the sliding requirements of the heat absorber. A supporting ring beam is arranged on the bottom of the heat absorber and the sliding track to support the heat absorber; Multiple sliding shoes are symmetrically distributed on the supporting ring beam and run on the sliding track. Each sliding shoe includes a floating device, a central main jack, and two auxiliary jacks as connecting accessories. The bottom of the floating device is installed in the sliding track, and the sliding track is provided with pads. The central main jack is installed on the main body of the floating device. a propulsion system, mounted on each skid shoe, that drives / brakes the skid shoe; The computer control system collects data collected during the operation of the heat absorber skid device to control the operation of the propulsion system, monitor and adjust the stroke and load of the skid shoe, ensure the synchronous movement of the four skid shoes, and control the load fluctuation deviation of the skid device within one stroke to not exceed 5%; The theodolite is connected to the bottom of the heat absorber and is used to monitor the verticality of the heat absorber during the sliding process.

2. The heat absorber sliding device according to claim 1, characterized in that: There are 4 skid boots.

3. The heat absorber sliding device according to claim 2, characterized in that: The spacers are made of polytetrafluoroethylene or high-density polyethylene.

4. The heat absorber sliding device according to claim 3, characterized in that: The bottom of the float is made of stainless steel.

5. The heat absorber sliding device according to claim 2, characterized in that: The floating device is a floating plate, which is installed in the sliding track. The bottom floating plate hoists the main oil top until the flange above the oil top is close to the flange on the lower surface of the heat absorber support ring beam. The sliding device is adjusted so that the flange above the oil top is facing the flange on the bottom plate of the support ring beam and is connected with bolts.

6. The heat absorber sliding device according to claim 1, characterized in that: Each propulsion system is equipped with a power unit, brakes and a control box. The power unit provides sufficient pressure and flow to achieve the designed taxiing speed. The brake is used to brake the propulsion system. The control box includes a control box body, sensors, hydraulic valves and connectors. The hydraulic valve is connected to the box through a connector; The sensor is placed in the control box and is used to collect the following data during the operation of the heat absorber sliding device: main cylinder pressure load, main cylinder stroke, push / pull cylinder pressure or load, push / pull cylinder stroke and side shift system. The sensor sends the data to the computer system via cables or wirelessly to control and monitor the load, vertical and horizontal displacement, actual center of gravity and / or propulsion stroke of the heat absorber sliding device.

7. The heat absorber sliding device according to claim 1, characterized in that: It also includes a high-precision level connected to the bottom of the heat absorber, which is used to measure the sinking amount of the sliding foundation during the sliding process to ensure the safety of the sliding.

8. The heat absorber sliding device according to claim 1, characterized in that: It also includes an anemometer connected to the bottom of the heat absorber, which is used to monitor the on-site wind speed in real time during the sliding process. When the wind speed exceeds the standard requirement, the sliding is stopped.

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