Air cooling system modular assembly construction method and construction equipment

Abstract

The present application relates to a kind of air cooling system modular combination assembly construction equipment and construction method, belong to air cooling system construction technical field.The equipment includes crane and the mobile tray for supporting wind cylinder and guard net, mobile tray outside is equipped with multiple horizontal offset detection components, angle offset detection component is equipped on horizontal offset detection component.The crane of the present application hoists wind cylinder before, wind cylinder and guard net are assembled on mobile tray, multiple horizontal offset detection components constitute annular detection piece, when crane hoists wind cylinder, wind cylinder offset is measured by annular detection piece and angle offset detection component, so that crane adjusts lifting position and lifting angle, by the combination of each unit of air cooling system into module on ground, the problem that there is not enough crane station and cross operation with other construction units is solved, reasonably utilize the narrow construction condition on site, safely, quickly install, shorten construction period, reduce construction cost.

Description

Technical Field

[0001] This invention belongs to the field of air cooling system construction technology, specifically relating to a modular assembly construction method and equipment for an air cooling system. Background Technology

[0002] Air cooling systems, also known as air-cooled islands, are common and important cooling equipment in thermal power plants and chemical plants, responsible for dissipating heat from thermal processes through air cooling. Traditional air cooling system construction typically employs a decentralized installation method, where individual components (such as air ducts, supporting structures, and fans) are transported to the construction site separately and then installed and assembled sequentially. This method requires a large site, necessitating sufficient space for the movement and operation of lifting equipment. Furthermore, because each component needs to be installed individually, the overall construction period is long, and the investment in machinery and labor is substantial. In addition, complex on-site conditions and overlapping operations with other construction units can reduce construction efficiency and present significant coordination challenges.

[0003] Existing decentralized installation methods have shortcomings, mainly in the following aspects. First, the construction of air cooling systems often requires multiple large cranes and construction equipment. However, when the construction site is small or irregular, the positioning and movement of cranes are restricted, making efficient construction organization difficult. Second, when working concurrently with other construction units, the space and time for hoisting operations can conflict, increasing safety hazards and construction management difficulties. Furthermore, traditional decentralized construction methods are time-consuming, especially when the site is limited or construction conditions are complex, easily extending the construction period and increasing machinery and labor costs. To solve these problems, a modular construction method is urgently needed that can improve installation efficiency, ensure construction safety, and reduce construction costs. Summary of the Invention

[0004] The purpose of this invention is to provide a modular assembly and construction equipment and method for an air cooling system in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] A modular assembly construction device for an air cooling system includes a main support structure and a fan system hoisted to the top of the main support structure. The fan system has several air ducts that are snapped into the main support structure, and protective nets corresponding to each air duct. The construction device includes a crane for hoisting the air ducts and a mobile pallet for supporting the air ducts and protective nets. The mobile pallet has multiple horizontal offset detection components on its outer side, one of which has an angular offset detection component. Before the crane lifts the air ducts, the air ducts and protective nets are assembled on the mobile pallet. The multiple horizontal offset detection components are connected in pairs to form a ring-shaped detection element surrounding the air ducts. When the crane lifts the air ducts, the horizontal offset of the air ducts is measured by the ring-shaped detection element, and the angular offset of the air ducts is measured by the angular offset detection component, so that the crane can adjust the lifting position and lifting angle.

[0007] As a further optimization of the present invention, the horizontal offset detection component includes an outer arc plate and an inner arc plate, and a pressure detection component disposed between the outer arc plate and the inner arc plate. The outer arc plate is provided with a positioning component, which can abut against the main support structure to fix the outer arc plate.

[0008] As a further optimization of the present invention, each of the outer arc plate and the inner arc plate is provided with a slot at one end, and each of the outer arc plate and the inner arc plate is provided with a block at the other end. Each of the outer arc plate and the inner arc plate is provided with a locking member corresponding to the slot. When the block is inserted into the slot, the locking member corresponding to the slot can lock the block.

[0009] As a further optimization of the present invention, the pressure detection element includes a first cylinder hinged to the inner side of the outer arc plate, a second cylinder slidably disposed on one side of the first cylinder, and a pressure sensor and a first spring disposed between the first cylinder and the second cylinder.

[0010] As a further optimization of the present invention, a swing limiting component corresponding to the first cylinder is slidably provided on the outer arc plate, and a set of locking components corresponding to the swing limiting component is provided on the top of the outer arc plate. Two sets of limiting grooves are respectively opened on both sides of the swing limiting component. A second spring is provided on both sides of the first cylinder. The end of the second spring away from the first cylinder is connected to the inner side of the outer arc plate. When the swing limiting component slides radially along the outer arc plate and approaches the inner arc plate, it can limit the swing of the first cylinder.

[0011] As a further optimization of the present invention, the outer side of the air duct is uniformly provided with reinforcing ribs, and the angle offset detection component includes an arc-shaped platform fixed to the top of one of the outer arc plates, an arc-shaped rack fixed to the arc-shaped platform, a slide table slidably disposed on the top of the arc-shaped platform in the circumferential direction, a gear rotatably disposed on the inner side of the slide table, a driving component for driving the gear to rotate, a telescopic component fixed to the top of the slide table, a proximity switch fixed to one end of the telescopic component, and an angle detection component disposed on the slide table. The gear and the arc-shaped rack mesh with each other, and when the proximity switch touches the reinforcing rib on the air duct, the angle detection component can detect the angle change of the slide table.

[0012] As a further optimization of the present invention, the crane includes a traveling mechanism, a slewing mechanism disposed on the traveling mechanism, a boom disposed at the output end of the slewing mechanism, a luffing mechanism for adjusting the tilt angle of the boom, and a hoisting mechanism disposed on the boom. The hoisting mechanism consists of a winch and a hook assembly, and the hook assembly includes an assembly frame, a hook body rotatably disposed at the bottom of the assembly frame, and a drive motor fixedly disposed inside the assembly frame. The output end of the drive motor is fixedly disposed at the top of the hook body. The hoisting mechanism also includes a stop rotatably disposed on one side of the hook body, and a fixed pulley rotatably disposed at the top of the assembly frame and connected to the winch.

[0013] A modular assembly construction method for an air cooling system used to cool a steam turbine includes the following steps:

[0014] S1. Construct the main support structure of the air cooling system, which includes a concrete support frame, a steel staircase, and a steel structure platform. First, construct the concrete support frame, and then assemble and hoist the steel staircase and steel structure platform on the ground.

[0015] S2. Install the fan system on the steel structure platform. The fan system includes a fan duct, protective net, fan cover plate, fan cable tray and fan body. The fan duct, protective net, fan cover plate, fan cable tray and fan body are assembled and hoisted on the ground.

[0016] S3. Assemble and install the piping system, which includes a steam distribution pipe and a waste steam pipe. Install an A-frame on the steel structure platform, install the waste steam pipe and lower header connected to the steam turbine below the A-frame, and install the steam distribution pipe connected to the waste steam pipe in the A-frame.

[0017] During the hoisting process of the ventilation duct, the ventilation duct is first lifted by a crane. Before the crane lifts the ventilation duct, the ventilation duct and the protective net are assembled together on a moving pallet, and multiple horizontal offset detection components are connected in pairs to form a ring-shaped detection component surrounding the ventilation duct. When the crane lifts the ventilation duct, the horizontal offset of the ventilation duct is measured by the ring-shaped detection component, and the angular offset of the ventilation duct is measured by the angular offset detection component, so that the crane can adjust the lifting position and lifting angle, and then the ventilation duct is hoisted onto the steel structure platform.

[0018] As a further optimization of the present invention, in step S2, the air duct and protective net are first assembled and hoisted on the ground, then the condensate pipe and cleaning water pipe are installed under the concrete support, then the platform walkway paving and fan cover are installed, and finally the fan bridge and fan body are assembled and hoisted on the ground; in step S3, after the steam distribution pipe is installed, the exhaust pipe and support bracket, the partition wall and the lower sealing structure of the exhaust steam pipe, the vacuum pipeline, the ladder and maintenance platform, as well as the A-type inter-row walkway, the windbreak wall and the door are installed in sequence, and finally the pipeline system is subjected to a sealing test.

[0019] As a further optimization of the present invention, the steel structure platform is provided with an octagonal beam corresponding to the air duct, the octagonal beam is provided with a channel steel, and the air duct is provided with a snap-fit ​​component corresponding to the channel steel. When adjusting the lifting position and lifting angle, the crane adjusts the lifting position of the air duct to directly below the corresponding octagonal beam, adjusts the lifting angle of the air duct to a misaligned angle, and when the crane lifts the snap-fit ​​component of the air duct above the channel steel, the air duct is rotated so that the snap-fit ​​component is directly facing the channel steel before the air duct is lowered.

[0020] The beneficial effects of this invention are as follows:

[0021] 1) This invention solves the problems of insufficient crane positions and cross-operation with other construction units by assembling the various units of the air cooling system into modules on the ground and selecting appropriate cranes for hoisting. At the same time, it makes reasonable use of the limited construction conditions on site to achieve safe and rapid installation, shorten the construction period, ensure construction safety, and reduce construction costs.

[0022] 2) This invention uses an annular detection component assembled on the outside of a mobile pallet to detect the horizontal translation of the air duct during lifting. The angular displacement of the air duct is detected by the angular displacement detection component on the annular detection component, so that the crane can adjust the lifting position and lifting angle to avoid collision between the concrete support and the steel structure platform and the air duct during lifting, and ensure that the air duct can be smoothly assembled with the octagonal beam of the steel structure platform. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the construction equipment of the present invention;

[0024] Figure 2This is a schematic diagram of the horizontal offset detection component structure after docking according to the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the ventilation duct and protective net of the present invention;

[0026] Figure 4 This is a schematic diagram of the horizontal offset detection component structure before docking according to the present invention;

[0027] Figure 5 This is a top view of the horizontal offset detection component of the present invention;

[0028] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0029] Figure 7 This is a schematic diagram of the angle offset detection component structure of the present invention;

[0030] Figure 8 yes Figure 7 Enlarged view of point B in the middle;

[0031] Figure 9 This is a schematic diagram of the internal structure of the hook assembly of the present invention.

[0032] In the diagram: 1. Crane; 2. Moving pallet; 3. Horizontal offset detection component; 4. Angular offset detection component; 5. Positioning component; 11. Traveling mechanism; 12. Slewing mechanism; 13. Boom; 14. Luffing mechanism; 15. Lifting mechanism; 31. Outer arc plate; 32. Inner arc plate; 33. Pressure detection component; 34. Slot; 35. Block; 36. Locking component; 37. Swing limiting component; 38. Locking component; 39. Limiting groove; 41. Arc-shaped platform; 42. Arc-shaped... 43. Rack; 44. Slide table; 45. Gear; 46. Drive component; 47. Telescopic component; 48. Proximity switch; 49. Slide rail; 101. Assembly frame; 102. Hook body; 103. Drive motor; 104. Stop component; 105. Fixed pulley; 331. First cylinder; 332. Second cylinder; 333. Pressure sensor; 334. First spring; 335. Second spring; D. Air duct; N. Protective net; C. Concrete support; S. Steel structure platform. Detailed Implementation

[0033] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0034] First Embodiment

[0035] like Figure 1-3As shown, this embodiment relates to a modular assembly construction equipment for an air cooling system. This equipment is used to assemble the air duct D and protective net N of the air cooling system's fan system together and to hoist the air duct D. The air cooling system includes a main support structure and a fan system hoisted to the top of the main support structure. The fan system has several air ducts D that are snapped onto the top of the main support structure, and protective nets N corresponding to each air duct D. The main support structure includes a concrete support C and a steel structure platform S set on top of the concrete support C. The concrete support C has multiple pillars, and the steel structure platform S has multiple plates arranged in a rectangular array. Each plate has an octagonal assembly hole, and an octagonal beam is fixed in the assembly hole. Each side of the octagonal beam has a channel steel for snapping onto the air duct D. The top of the air duct D has snapping components corresponding to the channel steel. Reinforcing ribs are evenly arranged on the outer side of the air duct D, and the four corners of the bottom of each top plate are connected to pillars of the concrete support C. The construction equipment includes a crane 1 for hoisting the ventilation duct D, and a mobile pallet 2 for supporting the ventilation duct D and the protective net N. The mobile pallet 2 has multiple casters evenly distributed on its bottom, and multiple horizontal offset detection components 3 are provided on its outer side. One of the horizontal offset detection components 3 has an angle offset detection component 4. The multiple horizontal offset detection components 3 are connected in pairs to form a ring-shaped detection element surrounding the ventilation duct D. The crane 1 includes a traveling mechanism 11, a slewing mechanism 12 mounted on the traveling mechanism 11, a boom 13 mounted at the output end of the slewing mechanism 12, a luffing mechanism 14 for adjusting the tilt angle of the boom 13, and a lifting mechanism 15 mounted on the boom 13. The lifting mechanism 15 consists of a winch and a hook assembly.

[0036] Before crane 1 lifts the ventilation duct D, the ventilation duct D and the protective net N are assembled on the moving pallet 2, and the moving pallet 2 is pushed directly under the corresponding octagonal beam. The number of horizontal offset detection components 3 is preferably four. The horizontal offset detection components 3 are spliced ​​on the outside of the moving pallet 2 to form an annular detection component surrounding the ventilation duct D. The annular detection component has an inner and outer double-layer structure. There are four positioning parts 5 on the outer side of the annular detection component. Before lifting the ventilation duct D, each positioning part 5 on the annular detection component abuts against the surrounding pillars to fix the outer layer structure of the annular detection component. When crane 1 lifts the ventilation duct D, if the ventilation duct D is horizontally offset, the inner layer structure of the annular detection component will squeeze the outer layer structure. There is a pressure detection component between the inner layer structure and the outer layer structure. Therefore, the horizontal offset of the ventilation duct D can be measured by the annular detection component. Crane 1 adjusts the boom 13 according to the detection result of the annular detection component to correct the horizontal offset. The number of reinforcing ribs on the ventilation duct D is preferably eight. After the horizontal offset correction is completed, the position of the reinforcing ribs is determined by the angle offset detection component 4 to determine the angle offset of the ventilation duct. The angle offset of the ventilation duct D is measured so that the crane 1 can adjust the lifting angle. The lifting angle of the ventilation duct D is adjusted to a misalignment angle. At this misalignment angle, the snap-fit ​​component of the ventilation duct D is misaligned with the channel steel, ensuring that the snap-fit ​​component can be lifted above the channel steel. When the crane 1 lifts the ventilation duct D to the set height, the snap-fit ​​component is located above the channel steel. At this time, the crane 1 rotates the ventilation duct D by a certain angle so that the snap-fit ​​component on the ventilation duct D corresponds with the channel steel. After the ventilation duct D is lifted and placed, the snap-fit ​​component is embedded in the channel steel, completing the lifting of the ventilation duct D.

[0037] Specifically, such as Figure 4-6 As shown, the horizontal offset detection component 3 includes an outer arc plate 31 and an inner arc plate 32, and a pressure detection component 33 disposed between the outer arc plate 31 and the inner arc plate 32. Both the outer arc plate 31 and the inner arc plate 32 have multiple casters at their bottoms. One end of the bottom of the outer arc plate 31 has a positioning component 5, which abuts against the main support structure to fix the outer arc plate 31. One end of both the outer arc plate 31 and the inner arc plate 32 has a slot 34, and the other end of both has a locking block 35. Both the outer arc plate 31 and the inner arc plate 32 have locking components 36 corresponding to the slots 34. When the locking block 35 is inserted into the slot 34, the locking component 36 corresponding to the slot 34 can lock the locking block 35. The pressure detection element 33 includes a first cylinder 331 hinged to the inner side of the outer arc plate 31, a second cylinder 332 slidably disposed on one side of the first cylinder 331, and a pressure sensor 333 and a first spring 334 disposed between the first cylinder 331 and the second cylinder 332.

[0038] When assembling the horizontal offset detection component 3, the locking block 35 on the inner arc plate 32 is embedded into the slot 34 on the adjacent inner arc plate 32, and the locking block 35 on the outer arc plate 31 is embedded into the slot 34 on the adjacent outer arc plate 31. The locking block 35 is then locked by the locking member 36. The locking member 36 is preferably an electric push rod. The locking block 35 has a through hole corresponding to the output shaft of the electric push rod, and countersunk holes are provided above the slots 34 on both the outer arc plate 31 and the inner arc plate 32. The output shaft of the electric push rod passes through the through hole of the locking block 35 and then embeds into the countersunk hole, which can improve the locking effect. After the horizontal offset detection component 3 is assembled, the four inner arc plates 32 form the inner layer structure of the annular detection component, and the four outer arc plates 31 form the outer layer structure of the annular detection component. The positioning member 5 is preferably a hydraulic cylinder. The positioning member 5 is fixed at one end of the bottom of the outer arc plate 31. When the positioning member 5 is stretched, it abuts against the support column of the concrete support C, and the outer arc plate 31 is fixed by the four positioning members 5. When lifting the ventilation duct D, if the duct D shifts horizontally, pressure is applied to the inner structure composed of the inner arc plate 32. The pressured inner arc plate 32 compresses the second cylinder 332, causing the second cylinder 332 to slide towards the inside of the first cylinder 331. The pressure sensor 333 is then compressed by the first spring 334. The crane 1 has a control system wirelessly connected to the pressure sensor 333. The control system determines the magnitude and direction of the force on the inner structure of the annular detection element based on the detection results of each pressure sensor 333. The crane 1 adjusts the boom 13 according to the magnitude and direction of the force on the inner structure to correct the horizontal shift during lifting. When the pressure measured by each pressure sensor 333 is less than the set value, the correction of the horizontal shift is complete. The ring-shaped detection element can also play a role in wind protection when lifting the ventilation duct D. When the crane 1 lifts the ventilation duct D, the center of gravity of the object suspended by the boom 13 is on the ventilation duct D. Without the ring-shaped detection element, the wind force on the ventilation duct D is stronger. Therefore, when the ring-shaped detection element is installed, the influence of wind force on the lifting position correction effect can be significantly reduced.

[0039] Please see Figure 7The angle offset detection component 4 includes an arc-shaped platform 41 fixed to the top of one of the outer arc plates 31, an arc-shaped rack 42 fixed to the arc-shaped platform 41, a slide 43 slidably disposed on the top of the arc-shaped platform 41 in the circumferential direction, a gear 44 rotatably disposed on the inner side of the slide 43, a drive member 45 for driving the gear 44 to rotate, the drive member 45 preferably being a motor and a worm gear transmission assembly disposed at the output end of the motor, the worm gear of the drive member 45 being fixed to the gear 44 through a rotating shaft, a telescopic member 46 fixed to the top of the slide 43, a contact proximity switch 47 fixed to one end of the telescopic member 46, and an angle detection component disposed on the slide 43, the telescopic member 46 preferably being an electric push rod, the gear 44 meshing with the arc-shaped rack 42, and an arc-shaped slide rail 48 fixed to the top of the arc-shaped platform 41, the slide 43 being slidably connected to the slide rail 48. When measuring angular deviation, the lifting duct D is activated, and the telescopic member 46 extends, bringing the proximity switch 47 closer to the duct D. Then, the drive member 45 drives the gear 44 to rotate. Through the meshing of the gear 44 and the arc-shaped rack 42, the slide table 43 is driven to slide along the slide rail 48. When the proximity switch 47 touches the reinforcing rib on the duct D, the angle detection element can detect the angular change of the slide table 43. This angle detection element is preferably an angle sensor. Alternatively, in some other embodiments, the angle detection element can also be a Hall sensor used to detect the number of rotations of the motor output shaft of the drive member 45. After the angle detection element completes its detection, it sends the detection result to the control system of the crane 1, thereby enabling the crane 1 to adjust the angles of the hook assembly and the duct D.

[0040] Furthermore, such as Figure 5 and Figure 6As shown, a swing-limiting component 37 corresponding to the first cylinder 331 is slidably provided on the outer arc plate 31. The swing-limiting component 37 is U-shaped and has an opening. A set of locking components 38 corresponding to the swing-limiting component 37 is provided on the top of the outer arc plate 31. Two sets of limiting grooves 39 are respectively opened on both sides of the swing-limiting component 37. A second spring 335 is provided on both sides of the first cylinder 331. The end of the second spring 335 away from the first cylinder 331 is connected to the inner side of the outer arc plate 31. When the swing-limiting component 37 slides radially along the outer arc plate 31 and approaches the inner arc plate 32, it can limit the swing of the first cylinder 331. The first spring 334 is used to squeeze the pressure sensor 333 and also to cooperate with the second spring 335 to provide a reset spring force to the pressure detection component 33, reducing the shaking of the air duct D when adjusting the horizontal offset. The top of the outer arc plate 31 is provided with a hole corresponding to the set of locking components 38. When the swing limiting component 37 moves toward the inner arc plate 32, the locking member 38 passes through the insertion hole and is embedded in the limiting groove 39 away from the opening of the swing limiting component 37, thereby locking the swing limiting component 37. The swing limiting component 37 can limit the swing of the first cylinder 331 and the second cylinder 332, facilitating the assembly of each horizontal offset detection component 3. When the swing limiting component 37 moves away from the inner arc plate 32, the locking member 38 passes through the insertion hole and is embedded in the limiting groove 39 near the opening of the swing limiting component 37, thereby locking the swing limiting component 37 again and releasing its restriction on the first cylinder 331 and the second cylinder 332.

[0041] Additionally, the hook assembly includes an assembly frame 151, a hook body 152 rotatably mounted at the bottom of the assembly frame 151, a drive motor 153 fixed inside the assembly frame 151, and the output end of the drive motor 153 fixed to the top of the hook body 152. The lifting mechanism 15 also includes a stop 154 ​​rotatably mounted on one side of the hook body 152, and a fixed pulley 155 rotatably mounted on the top of the assembly frame 151 and connected to the winch. When the duct D is relatively light, the angle of the duct D can be adjusted by rotating the hook body 152 using the drive motor 153. If the duct D is relatively heavy, the angle of the duct D can also be adjusted by controlling the traveling mechanism 11 to move the crane 1 along an arc trajectory with the hook body 152 as the center of rotation.

[0042] Second Embodiment

[0043] This embodiment relates to a modular assembly construction method for an air cooling system. This method is based on the construction equipment described in the previous embodiment and specifically includes the following steps:

[0044] Step S1: First, conduct a basic acceptance inspection of the materials for the air cooling system. After the basic acceptance inspection is completed, check and assemble the steel structure platform components, and build the main support structure of the air cooling system. The main support structure of the air cooling system includes a concrete support C, a steel staircase, and a steel structure platform S. First, construct the concrete support C, and then assemble and hoist the steel staircase and steel structure platform S on the ground.

[0045] Step S2: Install the fan system on the steel structure platform S. First, assemble and hoist the fan duct D and the protective net N on the ground. Then, install the condensate pipe and cleaning water pipe under the concrete support C. Next, install the platform walkway paving and the fan cover plate. Finally, assemble and hoist the fan bridge and the fan body on the ground.

[0046] Step S3: Assemble and install the piping system, which includes steam distribution pipes and exhaust steam pipes. Install an A-frame on the steel structure platform S. Install the exhaust steam pipes and lower headers connected to the steam turbine below the A-frames. Install the steam distribution pipes connected to the exhaust steam pipes within the A-frames. After the steam distribution pipes are installed, install the exhaust pipes and supports, partition walls and lower sealing structures for the exhaust steam pipes, vacuum lines, condensate lines, flash tanks and desuperheating and pressure reducing lines, ladders and maintenance platforms, as well as A-frame walkways, windbreak walls and doors. Finally, conduct a tightness test on the piping system. Other pipelines include heat exchange lines, flash tanks and related flash tank pipelines, and desuperheating and pressure reducing lines. After handover and acceptance, the modular assembly of the air cooling system is completed.

[0047] The exhaust steam pipe is the main pipe through which steam exits the turbine. It runs from inside the plant to the steam distribution pipe located at the top of the A-frame inside the air-cooled tower. This distribution pipe is connected in series with the radiator tube bundles installed on both sides of the A-frame. The steam cools down through the radiators, condenses into water, and collects in the lower header connected below the radiator tube bundles. Finally, the collected water is returned to the condensate tank inside the plant. The exhaust pipe is a small pipe that discharges air from the piping system during turbine startup when steam is first introduced. The supports are the brackets for these small pipes. The vacuum pumping line and condensate line are small piping systems attached to the exhaust steam line. The condensate line connects to the lower header and then to the condensate tank. The flash tank is located at the bottom of the turbine and is also attached to the exhaust steam line. The desuperheating and pressure reducing line is also attached to the exhaust steam line, and the temperature and pressure are reduced by the desuperheating and pressure reducing device. The cleaning line is separate and is pressurized by a cleaning water pump in the plant. It is mainly used to flush and clean dust and dirt from the surface of the radiator fins on the A-frame.

[0048] During the hoisting process of the ventilation duct D, the ventilation duct D is first hoisted by crane 1. Before the crane 1 hoists the ventilation duct D, the ventilation duct D and the protective net N are assembled together on the moving pallet 2, and multiple horizontal offset detection components 3 are connected in pairs to form a ring-shaped detection component surrounding the ventilation duct D. When the crane 1 hoists the ventilation duct D, the horizontal offset of the ventilation duct D is measured by the ring-shaped detection component, and the angular offset of the ventilation duct D is measured by the angular offset detection component 4, so that the crane 1 can adjust the hoisting position and hoisting angle, and then the ventilation duct D is hoisted onto the steel structure platform S. The steel structure platform S is equipped with an octagonal beam corresponding to the ventilation duct D. The octagonal beam is equipped with channel steel, and the ventilation duct D is equipped with a snap-fit ​​component corresponding to the channel steel. When adjusting the lifting position and lifting angle, the crane 1 adjusts the lifting position of the ventilation duct D to be directly below the corresponding octagonal beam and adjusts the lifting angle of the ventilation duct D to an offset angle. When the crane 1 lifts the snap-fit ​​component of the ventilation duct D to the top of the channel steel, the ventilation duct D is rotated so that the snap-fit ​​component is directly facing the channel steel before the ventilation duct D is lowered.

[0049] During the assembly and installation of the steel staircase, to ensure the smooth progress of the aerial installation of the air cooling system, the steel staircase itself should be installed first. Steel staircases are mostly frame structures, either fabricated on-site or assembled from individual components. All should be assembled on the ground to form a preliminary, integrated staircase structure. Based on the weight and height of the staircase, a crane of appropriate tonnage should be selected, and the entire steel staircase frame should be lifted into place. After the steel staircase frame is fixed, the stair beams and treads should be installed in detail according to the construction drawings.

[0050] During the assembly and installation of the steel structure platform, within the limits of on-site construction conditions, as many components as possible should be pre-assembled on the ground and then lifted into place as a whole. During pre-assembly, clamps, jigs, over-clamps, cables, chain hoists, etc., can be used for temporary fixing. Appropriate sites and lifting equipment should be selected based on the length, width, height dimensions of the pre-assembled steel frame and the maximum weight of each component. The steel structure platform S should be assembled using sleepers, structural steel, and supports. The steel structure platform S must be sufficiently sturdy, and its flatness should be less than L / 1000 and less than or equal to 2.0 mm. When installing the octagonal beam support components for the wind turbine, after the octagonal beams are installed, the distances between the octagonal beams in the transverse, longitudinal, and diagonal directions (the center distance of the bolt holes on the octagonal beam mounting plate) should be measured to ensure that the distances in the four directions are consistent, with an error not exceeding 3 mm.

[0051] During the combined installation of the wind duct D and the protective net N, after the main beam of the platform is installed and passes inspection, the fan system is installed. First, the fan protective net (including the grille) is assembled on the ground, and then the wind duct is assembled to form a complete wind duct D with the protective net N, which is placed directly below the actual installation position. During hoisting, the crane 1 is outside the steel structure platform S, and the hook body 152 vertically lifts the wind duct D through the hole directly above the steel structure platform S, connects it to the support structure of the fan platform, and fixes it to the channel steel connected to the octagonal beam, thereby connecting the wind duct D to the steel structure platform S.

[0052] During the assembly and installation of the wind turbine body and its cable tray, the cable tray is first assembled on the ground. The cable tray consists of the tray body, railings, and joists. The wind turbine body includes the motor, gearbox, turbine hub, and blades. This main body can be pre-assembled on the cable tray platform, followed by leveling and alignment. The railings, joists, and gearbox supports are then assembled and leveled. After the cable tray assembly is complete, the turbine gearbox and upper motor are installed and secured. Finally, a crane is used to hoist the entire cable tray to its installation position above the wind tunnel. After leveling and alignment, the base bolts of the cable tray are tightened. Once one wind turbine unit cable tray is assembled, other unit cable trays can be hoisted and assembled until all are completed.

[0053] The upper steel structure of the steel platform S is mainly an A-frame, which serves as the main load-bearing structure for the exhaust steam pipes and steam distribution pipes. Air coolers are typically divided into 3 or 4 rows, each row of A-frames being a steel assembly structure. The highest installation point can reach 30-40 meters. To reduce high-altitude assembly work, ground assembly is preferred. A row of A-frames can be disassembled into 3 parts, assembled separately on the ground, and then hoisted. Before hoisting, the high-strength bolts at the connection nodes are tightened and inspected. The sections are hoisted into position on the platform, and then connected into a whole row of A-frames using longitudinal tie rods and diagonal supports. This improves efficiency, reduces the frequency of high-altitude work, and ensures construction safety.

[0054] During the assembly and installation of the windbreak wall, the windbreak wall should be constructed last, after the steam distribution pipes are installed. Before the steel structure of the windbreak wall is hoisted into place, temporary fixing measures are required for sections of the windbreak wall. These measures are continued until the top tie rods and supports are securely welded to the steam distribution pipes, at which point the temporary reinforcement measures are removed. The windbreak wall's wind-resistant columns, purlins, and supporting components should be pre-assembled on the ground before hoisting and installation. Before final tightening of the windbreak wall, it is necessary to measure and record the hole spacing at the base of the windbreak wall. This measurement record will determine the width of the windbreak wall, and the columns should be adjusted accordingly. The windbreak wall assembled on the ground is hoisted to the platform windbreak wall base and fixed. The tie rods are connected to the steam distribution pipe bundle, or the top supports are connected to the top of the A-frame. Simultaneously, each windbreak wall is bolted together. Finally, according to the windbreak wall installation drawing and the "color steel plate layout drawing," the color steel plates are fastened to the corresponding windbreak walls using self-tapping screws.

[0055] The exhaust steam pipeline is manufactured in several components, including specially shaped parts such as tree-shaped four-way connectors, guide elbows, expansion joints, and transition joints. All of these components have a diameter of over 3 meters and are installed between the compressor plant and the air cooling system, connecting the steam turbine and the air cooling system's steam distribution pipes in series. The installation space is limited, with no crane available, but the height reaches 30 meters. If each section were installed separately, a 12m*6m*30m double-row scaffolding would be required for the installation and welding of the exhaust steam pipeline. Therefore, the components and pipe sections should be assembled into three units on the ground (a tree-shaped four-way assembly section and two sections with expansion joint elbows). Finally, a suitable crane is selected to lift and assemble the assembled sections into a whole. It is important to reinforce the expansion joints before lifting to prevent the original tie rods from detaching and damaging them.

[0056] The steam distribution pipe is 35 meters long and is installed above the A-frame and heat exchange tube bundle. The installation work is at a high level. The incoming materials are pipe sections of different diameters. They should be assembled into 3 sections on both sides of the air cooling system near the ground and hoisted as a whole using a suitable large crane and a reasonable standing position.

[0057] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A modular assembly construction device for an air cooling system, the air cooling system comprising a main support structure and a fan system suspended from the top of the main support structure, the fan system having a plurality of air ducts that are snapped into the main support structure, and protective nets corresponding to each air duct, characterized in that: The construction equipment includes a crane (1) for hoisting the ventilation duct and a mobile pallet (2) for supporting the ventilation duct and the protective net. The mobile pallet (2) is provided with multiple horizontal offset detection components (3) on its outer side, and one of the horizontal offset detection components (3) is provided with an angle offset detection component (4). Before the crane (1) lifts the air duct, the air duct and protective net are assembled on the mobile pallet (2). Multiple horizontal offset detection components (3) are connected in pairs to form a ring-shaped detection component surrounding the air duct. When the crane (1) lifts the air duct, the horizontal offset of the air duct is measured by the ring-shaped detection component, and the angular offset of the air duct is measured by the angular offset detection component (4) so ​​that the crane (1) can adjust the lifting position and lifting angle. The horizontal offset detection component (3) includes an outer arc plate (31) and an inner arc plate (32), and a pressure detection component (33) disposed between the outer arc plate (31) and the inner arc plate (32). The outer arc plate (31) is provided with a positioning component (5), which can abut against the main support structure to fix the outer arc plate (31). The pressure detection element (33) includes a first cylinder (331) hinged to the inner side of the outer arc plate (31), a second cylinder (332) slidably disposed on one side of the first cylinder (331), and a pressure sensor (333) and a first spring (334) disposed between the first cylinder (331) and the second cylinder (332). The outer arc plate (31) is slidably provided with a swing limiting component (37) corresponding to the first cylinder (331), and the top of the outer arc plate (31) is provided with a set of locking components (38) corresponding to the swing limiting component (37). Two sets of limiting grooves (39) are respectively opened on both sides of the swing limiting component (37). The first cylinder (331) is provided with a second spring (335) on both sides. The end of the second spring (335) away from the first cylinder (331) is connected to the inner side of the outer arc plate (31). When the swing limiting component (37) slides radially along the outer arc plate (31) and approaches the inner arc plate (32), it can limit the swing of the first cylinder (331).

2. The modular assembly and construction equipment for the air cooling system according to claim 1, characterized in that: The outer arc plate (31) and the inner arc plate (32) are each provided with a slot (34) at one end, and a block (35) is provided at the other end of the outer arc plate (31) and the inner arc plate (32). The outer arc plate (31) and the inner arc plate (32) are each provided with a locking member (36) corresponding to the slot (34). When the block (35) is inserted into the slot (34), the locking member (36) corresponding to the slot (34) can lock the block (35).

3. The modular assembly and construction equipment for the air cooling system according to claim 1, characterized in that: The outer side of the air duct is uniformly provided with reinforcing ribs. The angle offset detection component (4) includes an arc-shaped platform (41) fixed to the top of one of the outer arc plates (31), an arc-shaped rack (42) fixed to the arc-shaped platform (41), a slide (43) slidably disposed on the top of the arc-shaped platform (41) in the circumferential direction, a gear (44) rotatably disposed on the inner side of the slide (43), a drive member (45) for driving the gear (44) to rotate, a telescopic member (46) fixed to the top of the slide (43), a proximity switch (47) fixed to one end of the telescopic member (46), and an angle detection member disposed on the slide (43). The gear (44) meshes with the arc-shaped rack (42). When the proximity switch (47) touches the reinforcing rib on the air duct, the angle detection member can detect the angle change of the slide (43).

4. The modular assembly and construction equipment for the air cooling system according to claim 1, characterized in that: The crane (1) includes a traveling mechanism (11), a slewing mechanism (12) mounted on the traveling mechanism (11), a boom (13) mounted on the output end of the slewing mechanism (12), a luffing mechanism (14) for adjusting the tilt angle of the boom (13), and a lifting mechanism (15) mounted on the boom (13). The lifting mechanism (15) consists of a winch and a hook assembly. The hook assembly includes an assembly frame (151), a hook body (152) rotatably mounted at the bottom of the assembly frame (151), and a drive motor (153) fixed inside the assembly frame (151). The output end of the drive motor (153) is fixed on the top of the hook body (152). The lifting mechanism (15) also includes a stop (154) rotatably mounted on one side of the hook body (152) and a fixed pulley (155) rotatably mounted on the top of the assembly frame (151) and connected to the winch.

5. A modular assembly construction method for an air cooling system, wherein the air cooling system is used to cool a steam turbine, characterized in that, The construction method is based on the modular assembly construction equipment for the air cooling system as described in any one of claims 1-4, and the construction method includes the following steps: S1. Construct the main support structure of the air cooling system, which includes a concrete support frame, a steel staircase, and a steel structure platform. First, construct the concrete support frame, and then assemble and hoist the steel staircase and steel structure platform on the ground. S2. Install the fan system on the steel structure platform. The fan system includes a fan duct, protective net, fan cover plate, fan cable tray and fan body. The fan duct, protective net, fan cover plate, fan cable tray and fan body are assembled and hoisted on the ground. S3. Assemble and install the piping system, which includes a steam distribution pipe and a waste steam pipe. Install an A-frame on the steel structure platform, install the waste steam pipe and lower header connected to the steam turbine below the A-frame, and install the steam distribution pipe connected to the waste steam pipe in the A-frame. During the hoisting process of the air duct, the air duct is first hoisted by the crane (1). Before the crane (1) hoists the air duct, the air duct and the protective net are assembled together on the moving pallet (2), and multiple horizontal offset detection components (3) are connected in pairs to form a ring-shaped detection component surrounding the air duct. When the crane (1) hoists the air duct, the horizontal offset of the air duct is measured by the ring-shaped detection component, and the angular offset of the air duct is measured by the angular offset detection component (4) so ​​that the crane (1) can adjust the hoisting position and hoisting angle, and then the air duct is hoisted onto the steel structure platform.

6. The modular assembly and construction method for the air cooling system according to claim 5, characterized in that: In step S2, the wind duct and protective net are first assembled and hoisted on the ground. Then, condensate pipes and cleaning water pipes are installed under the concrete support. Next, the platform walkway paving and wind turbine cover are installed. Finally, the wind turbine bridge and wind turbine body are assembled and hoisted on the ground. In step S3, after the steam distribution pipe is installed, the exhaust pipe and supports, the partition wall and the lower sealing structure of the exhaust steam pipe, the vacuum pipeline, the ladder and maintenance platform, as well as the A-type inter-row walkway, the windbreak wall and the door are installed in sequence. Finally, the pipeline system is subjected to a tightness test.

7. The modular assembly construction method for the air cooling system according to claim 6, characterized in that: The steel structure platform is provided with an octagonal beam corresponding to the air duct. The octagonal beam is provided with a channel steel. The air duct is provided with a clamping component corresponding to the channel steel. When adjusting the lifting position and lifting angle, the crane (1) adjusts the lifting position of the air duct to directly below the corresponding octagonal beam and adjusts the lifting angle of the air duct to the offset angle. When the crane (1) lifts the clamping component of the air duct to above the channel steel, it rotates the air duct so that the clamping component is facing the channel steel, and then lifts the air duct.

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