A support beam for heat absorber hoisting

Abstract

A support beam for lifting a heat absorber is provided, which is arranged at the bottom of the heat absorber and includes: a first beam arranged at the top, a second beam arranged at the bottom, and a support beam push-pull device arranged at the bottom of the heat absorber, the first beam and the second beam are spaced a certain distance apart and connected as a whole by a first screw, the support beam push-pull device is adjacent to the support beam and movably connected, the support beam push-pull device includes a push device slide rail, a push device bracket, and a portable hydraulic power device, wherein the push device slide rail is welded to the steel beam at the bottom of the heat absorber at the heat absorber assembly field, the push device bracket is installed under the steel beam at the bottom of the heat absorber, and the push device bracket slides under the push of the portable hydraulic power device.

Description

Technical Field

[0001] The invention relates to the technical field of heat absorber installation, in particular to a supporting crossbeam for hoisting a heat absorber. Background Art

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

[0003] The main construction area of ​​a solar thermal power station is divided into a mirror field area and a power island area. The power island area is the core of the entire power station. All regular solar energy will be collected in the absorber on the core building of the power island - the optical tower, thereby converting solar energy into thermal energy of molten salt. When the molten salt exchanges heat with water, steam is generated to generate electricity. The optical tower is a tall building, generally more than 190m high. It is different from the chimney of an ordinary thermal power plant in that it is a comprehensive structure that integrates structure, equipment, pipelines, insulation, heat absorption, and elevators, and is difficult to construct.

[0004] Most of the existing mechanisms and equipment construction are hoisted with the help of an external tower crane. The absorber steel frame is generally a non-independent all-steel structure. During the overall structural model and construction process of the steel frame, the lower part of the steel frame is supported on the top of the concrete tower at a certain height from the ground, and is bolted to the top steel beam of the concrete tower. The absorber steel frame has a cylindrical structure. 16 main load-bearing columns are arranged in a cylindrical shape on the inside of the molten salt absorber. There are 4 other steel columns inside, which serve as elevator shafts and support the top rotating crane equipment; the absorber steel frame column foot is fixed to the supporting steel beam at the top of the concrete tower by bolts. Before pouring the top floor of the tower, the bolts used to connect the absorber steel frame column foot need to be fixed to the supporting steel beam. The bolts need to be additionally protected to prevent damage to the bolts and threads. During the installation process, it is necessary to ensure that the components are firmly connected to ensure safety and reliability under the conditions of dead load, wind load, earthquake action and installation load. The current hoisting scheme is difficult to guarantee this.

[0005] In addition, all the details related to tower crane selection and installation need to be fully demonstrated and planned, and it is difficult to obtain a scientific, reasonable and economical mechanical configuration and installation plan, which slows down the construction progress of the light tower and makes the construction cost extremely high. Specifically, there are the following typical technical problems:

[0006] 1. The selection of tower cranes is complicated, including the selection of maximum lifting weight, maximum lifting height, and arm length. The selection process of tower cranes is complicated and it is difficult to choose the tower crane with the best economy and effect.

[0007] 2. The tower crane needs to be inspected, repaired and renovated before installation, and the tower crane attachment needs to be installed. The selection of jacking time is difficult to coordinate with the construction period, so as to ensure the high reliability of the hoisting machinery and the shortest hoisting time, and minimize the impact of the tower crane jacking work on the project construction period;

[0008] 3. In order to save time for personnel going up and down and preserve the physical strength of the jacking workers, it is necessary to design a separate access walkway, which needs to be dismantled later, thereby increasing engineering losses and reducing operating efficiency;

[0009] 4. The tower crane hoisting project has high risks. The tower crane hoisting machinery is set on the top of the concentrated heat absorption system, and the layout height is about 220m. It is large in size and it is difficult to ensure that the heavy heat absorber to be hoisted can be reliably suspended on the top before being installed on the top of the concentrated heat absorption system.

[0010] Therefore, it is necessary to study a new absorber hoisting process and a corresponding absorber hoisting support structure to solve one or more of the above-mentioned technical problems. Summary of the invention

[0011] In order to solve one or more technical problems in the prior art, the present invention provides a support beam for hanging a heat absorber, which is arranged at the bottom of the heat absorber and is characterized by comprising:

[0012] A first crossbeam is arranged at the top, a second crossbeam is arranged at the bottom, and a support crossbeam push-pull device is arranged at the bottom of the heat absorber. The first crossbeam and the second crossbeam are separated by a certain distance and connected as a whole by a first screw. The support crossbeam push-pull device is adjacent to the support crossbeam and movably connected.

[0013] According to yet another aspect of the present invention, the first screw rod is an M64 screw rod, and the distance between the first cross beam and the second cross beam is 2450 mm.

[0014] According to another aspect of the present invention, the supporting beam push-pull device includes a pushing device slide rail, a pushing device bracket and a portable hydraulic power device, wherein the pushing device slide rail is welded to the steel beam at the bottom of the heat absorber at the heat absorber assembly field, the pushing device bracket is installed under the steel beam at the bottom of the heat absorber, and the pushing device bracket slides under the push of the portable hydraulic power device.

[0015] According to another aspect of the present invention, the jacking device bracket is installed under the jacking device slide rail by using bolts, and the supporting beam is fixed to the jacking device bracket by using M30 bolts.

[0016] According to another aspect of the present invention, the portable hydraulic power device is a hydraulic jack, including a hydraulic hose and accessories, and the length of the accessories is determined according to the position of the hydraulic jack, the working position platform and variables related to the operation of the equipment, and the variables are defined by the operator.

[0017] According to yet another aspect of the present invention, the cross-sectional shape of the attachment is T-shaped, I-shaped or inverted trapezoidal.

[0018] According to another aspect of the present invention, after the supporting crossbeam is hoisted to the installation position, the lower surface of the bottom beam of the steel frame of the heat absorber is consistent with the elevation of the top of the tower body of the solar thermal tower where the heat absorber is located.

[0019] According to another aspect of the present invention, an anti-collision device is also included. After the support beam is hoisted to the installation position, the support beam push-pull device is removed, the upper nut and gasket of the support beam are removed and the MSR (heat absorber) is slowly lowered as a whole.

[0020] According to another aspect of the present invention, after the supporting crossbeam is hoisted to the installation position, the second screw is inserted into the installation position of the bottom steel beam of the heat absorber until the MSR bottom steel beam is at the same elevation as the tower top, and there is a gap between the upper surface of the supporting crossbeam and the bottom steel beam of the heat absorber, and the second screw is an M64 screw.

[0021] According to another aspect of the present invention, a wireless monitor and an anti-collision module are installed at the end of the supporting beam closest to the inner wall of the tower body to prevent the heat absorber from directly colliding with the inner wall of the tower body.

[0022] Compared with the prior art, the present invention has one or more of the following technical effects:

[0023] 1) Adopting internal hoisting instead of tower crane can avoid comprehensive demonstration and planning of all details related to tower crane selection and installation, so as to obtain scientific, reasonable and economical mechanical equipment and installation plan, improve the construction progress of light tower and reduce construction cost;

[0024] 2) The hoisting structure used is simple, the hoisting components are small in size and light in weight, which can ensure safe construction and simple construction process;

[0025] 3) The support beam is a component used throughout the hoisting process, and can be flexibly coordinated with other components. In addition, the support beam is arranged in multiple rings, which improves the redundancy and uniformity of the equipment. It is suitable for all hoisting projects and has a wide range of applications.

[0026] 4) It can realize the coordination of low-cost and common mechanical forms with supporting beams, further reducing construction costs.

[0027] 5) The lifting support beam of the absorber is applied to the absorber and then hoisted by sliding as a whole. The overall sliding hoisting solution can reduce the high-altitude operation process and reduce the risk of falling from height. Since the operation time on the tower is greatly shortened, the cross-operation at the bottom of the tower is reduced. The overall sliding hoisting construction solution saves 220 days (construction period advantage) compared with the traditional high-altitude scattered assembly, reduces the use time and labor costs of a large number of large lifting equipment, and overall lifts all components for ground assembly, reducing a large number of high-altitude operations and reducing the input of construction personnel. The number of construction personnel input is reduced by 3,900 man-days compared with the conventional method, and the cost is also greatly reduced accordingly, and the construction difficulty is reduced (cost advantage). BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to understand the details of the above features of the present invention, reference may be made to the embodiments for a more detailed description of the invention briefly summarized above. The accompanying drawings relate to preferred embodiments of the present invention and are described as follows:

[0029] Figure 1 It is a schematic structural diagram of a bottom supporting beam of a heat absorber (MSR) according to a preferred embodiment of the present invention;

[0030] Figure 2 A schematic diagram of a scaffolding operating platform at the bottom of a heat absorber constructed using support beams according to a preferred embodiment of the present invention;

[0031] Figure 3 A schematic diagram of the change of the position of the jack during the installation of the supporting beam according to a preferred embodiment of the present invention;

[0032] Figure 4 It is a schematic diagram of the structure after the supporting crossbeam is pushed and pulled to the groove according to a preferred embodiment of the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the anti-collision measures for the supporting beams in the absorber tower according to a preferred embodiment of the present invention.

[0034] Explanation of the reference numerals in the figure: 1: supporting beam, 2: supporting beam push-pull device, 11: first beam, 12: second beam, 21: pushing device slide rail, 22: pushing device bracket, 23: portable hydraulic power device, 3: collision block. Specific embodiments

[0035] Various embodiments will now be described in detail, one or more examples of which are illustrated in the figures. Each example is provided by way of explanation and is not meant to be limiting. For example, a feature illustrated or described as part of one embodiment can be used in or combined with any other embodiment to produce yet another embodiment. The present invention is intended to include such modifications and variations.

[0036] In the following description of the drawings, the same reference numerals indicate the same or similar components. Generally speaking, only the differences of individual embodiments will be described. Unless otherwise explicitly stated, the description of a part or aspect in one embodiment can also be applied to the corresponding part or aspect in another embodiment.

[0037] See also Figure 1 , which shows a support beam 1 for the heat absorber hoisting according to a preferred embodiment of the present invention. The support beam 1 is arranged at the bottom of the heat absorber, and multiple support beams 1 are arranged in a ring around the bottom of the tower. The spacing between the multiple support beams 1 is reasonably set. Each independent support beam 1 includes: a first beam 11 arranged at the top, a second beam 12 arranged at the bottom, and a support beam push-pull device 2 arranged at the bottom of the heat absorber. The first beam 11 and the second beam 12 are separated by a certain distance and connected as a whole by a first screw rod. The support beam push-pull device 2 is adjacent to the support beam 1 and is movably connected. In this embodiment, the first screw rod is selected to use an M64 screw rod, and the screw rod length is determined by other units to ensure that it can be correctly embedded in the beam. Of course, according to the requirements of the project, those skilled in the art can choose screws or connectors of other types or diameters. The total weight of the support beam considered is 2744*1.2=3292kg. In this embodiment, the first cross beam 11 and the second cross beam 12 are connected to the welding plate by a 10.9-grade M30*200 half-thread bolt and nut, and the spacing between the two cross beams is 2450mm. Similarly, according to the needs of the project, the spacing can be adjusted according to the construction process requirements. The premise of adjustment is to perform strength calculation and verification, and the spacing is related to the selection of the first screw.

[0038] In this embodiment, the supporting beam push-pull device 2 includes a pushing device slide rail 21, a pushing device bracket 22 and a portable hydraulic power device 23, wherein the pushing device slide rail 21 is welded to the steel beam at the bottom of the heat absorber in the heat absorber assembly field, the pushing device bracket 22 is installed under the steel beam at the bottom of the heat absorber, and the pushing device bracket 22 slides under the push of the portable hydraulic power device 23.

[0039] According to another embodiment of the present invention, the jacking device bracket 22 is installed under the jacking device slide rail 21 using M64 bolts, and the support beam 1 is fixed to the jacking device bracket 22 using M30 bolts. According to the size and material of the support beam 1 and the jacking device bracket 22, other connecting parts with appropriate diameters are selected, which is also within the protection scope of the present invention.

[0040] like Figure 3As shown, in this embodiment, the portable hydraulic power unit adopts a hydraulic jack (a double-acting hydraulic jack with a stroke of 1200mm is adopted in this embodiment), including a hydraulic hose and a T-type attachment. The length of the T-type attachment is determined according to the position of the hydraulic jack, the working position platform and variables related to the operation of the equipment, and the variables are defined by the operator. The cross-sectional shape of the attachment is appropriately selected according to the space requirements for installation, and accessories with other cross-sectional forms such as I-shaped and inverted trapezoidal shapes can also be used.

[0041] In this embodiment, the working pressure of the hydraulic jack is 200 Bar, the minimum thrust capacity is 12.7 metric tons, and the minimum pulling force is 8.7 metric tons.

[0042] When the support beam 1 is hoisted to the installation position, the lower surface of the steel frame bottom beam of the heat absorber is required to be consistent with the top elevation of the tower body of the solar thermal tower where the heat absorber is located. It also includes an anti-collision device. When the support beam 1 is hoisted to the installation position, the support beam push system 2 is removed, the upper nut and gasket of the support beam 1 are removed, and the MSR is slowly lowered as a whole.

[0043] At the same time, after the support beam 1 is hoisted to the installation position, the second screw is inserted into the installation position of the bottom steel beam of the heat absorber until the MSR bottom steel beam is consistent with the tower top elevation. At this time, the gap between the upper surface of the support beam 1 and the bottom steel beam of the heat absorber is 17 mm. In this embodiment, the second screw is an M64 screw. Of course, according to the requirements of the project, those skilled in the art can choose screws or connectors of other types or diameters.

[0044] A wireless monitor and an anti-collision module are installed at the end of the supporting beam 1 closest to the inner wall of the tower body to prevent the heat absorber from directly colliding with the inner wall of the tower body.

[0045] The working principle of the present invention and the installation process during the heat absorber hoisting process:

[0046] 1. Installation of the support beam push-pull device 2 at the bottom of the heat absorber: The support beam push-pull device 2 is composed of a push device slide rail 21, a push device bracket 22, and a portable hydraulic power device 23. The push device slide rail 21 is welded to the bottom steel beam of the heat absorber at the heat absorber assembly field. The push device bracket 22 is connected to the bottom of the push device slide rail with bolts. The push device bracket can slide under the push of the portable hydraulic power device 23.

[0047] 2. Assembly and transportation of the bottom support beam 1 and the support beam jacking device 2: After the ground assembly is completed, the total weight is 2.7t. Use a 5t forklift to transport it to the bottom of the installation position and lift it. Use a 3t chain hoist to lift the support beam 1 to the position. The construction personnel stand on the pole lifting vehicle inside the tower and fix the support beam 1 to the jacking device bracket 2 with M30 bolts.

[0048] 3. Set up the scaffolding operating platform at the bottom of the heat absorber: Figure 2 As shown in the figure, when the absorber arrives at the position, the construction workers need to operate the sliding and adjustment of the supporting beams at the bottom of the absorber, so after the installation of the supporting beams, a double-layer scaffolding hanger platform with a diameter of 23m and a height of 3.5m is set up. This platform must not affect the advancement of the bottom supporting beams. The scaffolding platform is dismantled after the official platform at 213m in the tower is in place.

[0049] 4. If Figure 4 As shown, the installation of the heat absorber support beam 1:

[0050] (1) Operate the support beam push-pull device to push the support beam into the groove of the tower body;

[0051] (2) After the bottom support beam is pushed into the installation position, add an adjustment shim at the bottom of the sliding support installation position and insert a wooden block at the bottom of the lower support beam. After the force is applied, install a concave steel box under the bottom beam for the installation of the jack for lifting the support beam. Lift the oil jack until the top surface of the upper support beam is 17 mm lower than the top of the heat absorption tower concrete, and then stop lifting.

[0052] (3) Check that all systems are stressed and stable. Remove the support beam push system, remove the nuts and washers on the upper part of the support beam, slowly lower the MSR as a whole, and insert the M64 screw into the installation position of the MSR bottom steel beam until the MSR bottom steel beam is at the same elevation as the tower top. At this time, the gap between the upper surface of the support beam and the MSR bottom steel beam is 17 mm.

[0053] (4) Use a chain hoist to lift the supporting beam 1 as a whole, and insert the connecting bolts (M30*140) between the upper supporting beam 1 and the MSR bottom steel beam, and tighten the bolts. At this time, the gap between the bottom sliding support and the concrete surface is 27 mm.

[0054] (5) Adjust the buffer pads on the left and right sides of the support beam 1 to ensure that there is no gap between the buffer pads and the concrete. During the process, the gap can be adjusted using adjustment pads.

[0055] (6) Secondary grouting of sliding bearings (the grouting material is micro-expansion grouting material, constructed by the civil engineering unit).

[0056] (7) Install two ultra-thin hydraulic oil jacks and chain hoists at the bottom of the lower support beam 1, and lift the lower support beam to the installation position. At the same time, tighten the second screw of M64; remove the oil jack and chain hoist.

[0057] See also Figure 5When inside the tower, during the hoisting process, due to the influence of wind on the lateral displacement of the absorber or tower body, the distance between the absorber and the inner wall of the concrete tower may change, causing the absorber to hit the inner wall of the tower. To avoid damage to the absorber equipment due to collision, a collision block 3 is installed at the rear end of the support beam 1 at the bottom of the absorber and fixed with bolts. This collision block 3 prevents the absorber from colliding with the inner wall of the concrete tower body; the collision block 3 is composed of a connecting steel plate and a rubber block, and is fixed with bolts at the bolt hole position where the steel beam at the bottom of the absorber connects with the support beam. A wireless monitoring device is installed above the end of each of the 16 support beams, and a dedicated person is assigned to monitor and record the distance between each support beam of the absorber and the inner wall of the tower, and to provide timely feedback to the operator responsible for hoisting.

[0058] In this embodiment, the heat absorber is hoisted in the form of internal hoisting rather than tower crane, avoiding comprehensive demonstration and planning of all details related to tower crane selection and installation, so as to obtain scientific, reasonable and economical mechanical equipment and installation scheme, improve the construction progress of light tower and reduce construction cost; the hoisting structure used is simple, the hoisting parts are small in size and light in weight, which can ensure safe construction and simple construction process; the supporting beam is a component used throughout the hoisting process, and can be flexibly coordinated with other components, and the supporting beam is arranged in multiple rings, which improves the redundancy and uniformity of the equipment, and is suitable for all hoisting projects with a wide range of applications; it can realize the coordination of low-cost and common mechanical forms (bolts, hydraulic presses, mechanical standard parts with common cross-section shapes) with the supporting beam, further reducing construction costs. The hoisting support beam of the heat absorber is applied to the heat absorber and then hoisted by overall sliding. The overall sliding hoisting scheme can reduce the high-altitude operation process and reduce the risk of falling from height, because the operation time on the tower is greatly shortened and the cross-operation at the bottom of the tower is reduced. The overall sliding hoisting construction plan saves 220 days (construction period advantage) compared with the traditional high-altitude scattered assembly, reduces the use time and labor costs of a large number of large lifting equipment, and overall improves the ground assembly of all components, reduces a large number of high-altitude operations, and reduces the input of construction personnel. The number of construction personnel input is reduced by 3,900 man-days compared with conventional methods, and the cost is also greatly reduced accordingly, and the construction difficulty is reduced (cost advantage).

[0059] While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope of the invention, which is defined by the following claims.

[0060] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the present invention. The technical features in these embodiments that do not contradict each other can be combined with each other. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A support beam for the heat absorber hoisting, arranged at the bottom of the heat absorber, characterized in that include: A first crossbeam arranged at the top, a second crossbeam arranged at the bottom, and a support crossbeam push-pull device arranged at the bottom of the heat absorber, the first crossbeam and the second crossbeam are spaced a certain distance apart and connected as a whole through a first screw, and the support crossbeam push-pull device is adjacent to the support crossbeam and movably connected; The supporting crossbeam push-pull device comprises a push device slide rail, a push device bracket and a portable hydraulic power device, wherein the push device slide rail is welded on the steel beam at the bottom of the heat absorber at the heat absorber assembly field, the push device bracket is installed under the steel beam at the bottom of the heat absorber, and the push device bracket slides under the push of the portable hydraulic power device; The portable hydraulic power device is a hydraulic jack, including a hydraulic hose and accessories, the length of which is determined by the position of the hydraulic jack, the working position platform and variables related to the operation of the equipment, the variables being defined by the operator; A wireless monitor and an anti-collision module are installed on the inner wall of the tower body of the solar thermal tower where the end of the supporting beam is closest to the heat absorber, so as to prevent the heat absorber from directly colliding with the inner wall of the tower body.

2. The support beam for heat absorber hoisting according to claim 1, characterized in that: The first screw rod is an M64 screw rod, and the distance between the first cross beam and the second cross beam is 2450 mm.

3. The support beam for hanging a heat absorber according to claim 1, characterized in that: The jacking device bracket is installed under the jacking device slide rail by bolts, and the supporting beam is fixed to the jacking device bracket by M30 bolts.

4. The support beam for hanging a heat absorber according to claim 1, characterized in that: The cross-sectional shape of the attachment is T-shaped, I-shaped or inverted trapezoidal.

5. The support beam for hanging a heat absorber according to claim 1, characterized in that: After the supporting crossbeam is hoisted to the installation position, the lower surface of the bottom beam of the steel frame of the heat absorber is consistent with the elevation of the top of the tower body of the solar thermal tower where the heat absorber is located.

6. The support beam for hanging a heat absorber according to claim 1, characterized in that: After the support beam is hoisted to the installation position, the support beam pushing system is removed, the upper nut and gasket of the support beam are removed and the heat absorber is slowly lowered as a whole.

7. The support beam for hanging a heat absorber according to claim 1, characterized in that: After the support beam is hoisted to the installation position, the second screw is inserted into the installation position of the bottom steel beam of the heat absorber until the bottom steel beam of the heat absorber is at the same elevation as the tower top, and there is a gap between the upper surface of the support beam and the bottom steel beam of the heat absorber.

Images