Modular combined assembly construction method and construction equipment for air cooling system

Abstract

The invention relates to air cooling system modular combined assembly construction equipment and a construction method, and belongs to the technical field of air cooling system construction. The equipment comprises a crane and a movable tray used for bearing an air duct and a protective net, a plurality of horizontal deviation detection assemblies are arranged on the outer side of the movable tray, and angle deviation detection assemblies are arranged on the horizontal deviation detection assemblies. Before the crane hoists the air duct, the air duct and the protective net are assembled on the movable tray, the multiple horizontal deviation detection assemblies form the annular detection piece, and when the crane hoists the air duct, deviation of the air duct is measured through the annular detection piece and the angle deviation detection assembly, so that the crane adjusts the hoisting position and the hoisting angle, and the hoisting efficiency is improved. All units of the air cooling system are combined into a module on the ground, so that the problems that a crane does not stand enough and cross operation is carried out with other construction units are solved, narrow construction conditions on site are reasonably utilized, safe and rapid installation is achieved, the construction period is shortened, and the construction cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of air cooling system construction, and in particular relates to a modular combined assembly construction method and construction equipment for an air cooling system. Background Art

[0002] The air cooling system, also known as the air cooling island, is an important cooling equipment commonly found in thermal power plants or chemical plants. It is responsible for discharging heat from the thermal process through air cooling. The traditional air cooling system construction method usually adopts a decentralized installation, that is, each component (such as the air duct, supporting structure, fan, etc.) is transported to the construction site separately, and then installed and assembled in sequence. This type of construction method has high requirements for the site, and sufficient space needs to be reserved for the movement and operation of the lifting equipment. In addition, since each component needs to be installed separately, the overall construction period is long, and the investment in machinery and labor is also large. In addition, the complex working conditions on site and the cross-operation of other construction units may lead to reduced construction efficiency and great coordination difficulties.

[0003] The existing decentralized installation methods have shortcomings, which are mainly reflected in the following aspects. First, the construction of air cooling systems often requires multiple large cranes and construction equipment. When the construction site is small or irregular, the position and movement of the cranes are restricted, making it difficult to achieve efficient construction organization. Secondly, in the case of cross-operation with other construction units, the space and time arrangements for hoisting operations will be affected by conflicts, increasing safety hazards and construction management difficulties. In addition, the traditional decentralized construction method is time-consuming, especially when the site is limited or the construction conditions are complex, which can easily extend the construction period and increase machinery and labor costs. In order to solve these problems, there is an urgent need for a modular construction method that can improve installation efficiency, ensure construction safety, and reduce construction costs. Summary of the invention

[0004] The purpose of the present invention is to provide an air cooling system modular combination assembly construction equipment and construction method in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A modular combination assembly construction equipment for an air cooling system, the air cooling system comprising a main support structure and a fan system hoisted on the top of the main support structure, the fan system having a plurality of wind ducts clamped with the main support structure, and protective nets corresponding to the wind ducts one by one, the construction equipment comprising a crane for hoisting the wind ducts, and a mobile pallet for supporting the wind ducts and the protective nets, a plurality of horizontal offset detection assemblies being provided on the outer side of the mobile pallet, one of the horizontal offset detection assemblies being provided with an angle offset detection assembly; before the crane hoists the wind duct, the wind duct and the protective net are assembled on the mobile pallet, a plurality of the horizontal offset detection assemblies are butted against each other in pairs to form an annular detection member surrounding the wind duct, when the crane hoists the wind duct, the horizontal offset of the wind duct is measured by the annular detection member, and the angle offset of the wind duct is measured by the angle offset detection assembly, so that the crane can adjust the lifting position and lifting angle.

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

[0008] As a further optimization scheme of the present invention, a card slot is provided at one end of the outer arc plate and the inner arc plate, and a card block is provided at the other end of the outer arc plate and the inner arc plate. The outer arc plate and the inner arc plate are provided with locking pieces corresponding to the card slot. When the card block is embedded in the card slot, the locking piece corresponding to the card slot can lock the card block.

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

[0010] As a further optimization scheme of the present invention, a swing limiting component corresponding to the first cylinder is slidably provided on the outer arc plate, and a group of locking parts corresponding to the swing limiting component are provided on the top of the outer arc plate, two groups of limiting grooves are respectively opened on both sides of the swing limiting component, and 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 scheme of the present invention, reinforcing ribs are evenly arranged on the outside of the wind tube, and the angle offset detection component includes an arc-shaped platform fixedly mounted on the top of one of the outer arc plates, an arc-shaped rack fixedly mounted on the arc-shaped platform, a slide arranged on the top of the arc-shaped platform for sliding along the circumferential direction, a gear rotatably arranged on the inner side of the slide, a driving member for driving the gear to rotate, a telescopic member fixedly mounted on the top of the slide, a proximity switch fixedly mounted at one end of the telescopic member, and an angle detection member arranged on the slide, the gear and the arc-shaped rack are meshed with each other, and when the proximity switch touches the reinforcing rib on the wind tube, the angle detection member can detect the angle change of the slide.

[0012] As a further optimization scheme of the present invention, the crane includes a traveling mechanism, a slewing mechanism arranged on the traveling mechanism, a boom arranged at the output end of the slewing mechanism, a luffing mechanism for adjusting the inclination angle of the boom, and a lifting mechanism arranged on the boom, the lifting mechanism is composed of a winch and a hook assembly, and the hook assembly includes an assembly frame, a hook body rotatably arranged at the bottom of the assembly frame, a driving motor fixedly arranged on the inner side of the assembly frame, the output end of the driving motor is fixedly arranged at the top of the hook body, and the lifting mechanism also includes a stopper rotatably arranged on one side of the hook body, and a fixed pulley rotatably arranged at the top of the assembly frame and connected to the winch.

[0013] A modular assembly construction method for an air cooling system, wherein the air cooling system is used to cool a steam turbine, and the construction method comprises the following steps:

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

[0015] S2. Install a fan system on the steel structure platform, wherein the fan system includes a wind tube, a protective net, a fan cover, a fan bridge and a fan body, and assemble and hoist the wind tube, the protective net, the fan cover, the fan bridge and the fan body on the ground;

[0016] S3. Combining and installing the piping system, which includes a steam distribution pipe and an exhaust steam pipe, installing an A-type frame on the steel structure platform, installing an exhaust steam pipe and a lower header connected to the steam turbine under the A-type frame, and installing a steam distribution pipe connected to the exhaust steam pipe in the A-type frame;

[0017] During the process of hoisting the wind duct, the wind duct is first hoisted by a crane. Before the crane hoists the wind duct, the wind duct and the protective net are assembled together on the mobile pallet, and multiple horizontal offset detection components are docked in pairs to form an annular detection component surrounding the wind duct. When the crane hoists the wind duct, the horizontal offset of the wind duct is measured by the annular detection component, and the angular offset of the wind duct is measured by the angular offset detection component, so that the crane adjusts the lifting position and lifting angle, and then hoist the wind duct onto the steel structure platform.

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

[0019] As a further optimization scheme of the present invention, an octagonal beam corresponding to the wind duct is provided on the steel structure platform, channel steel is provided on the octagonal beam, and a clamping component corresponding to the channel steel is provided on the wind duct. When adjusting the lifting position and the lifting angle, the crane adjusts the lifting position of the wind duct to directly below the corresponding octagonal beam, and adjusts the lifting angle of the wind duct to a misaligned angle. When the crane lifts the clamping component of the wind duct to above the channel steel, the wind duct is rotated so that the clamping component faces the channel steel, and then the wind duct is lifted.

[0020] The beneficial effects of the present invention are:

[0021] 1) The present invention combines the various units of the air cooling system into modules on the ground and selects a suitable crane for hoisting, thereby solving the problem of insufficient crane stations and cross-operation with other construction units. At the same time, the narrow construction conditions on site are reasonably utilized to achieve safe and rapid installation, shortening the construction period, ensuring construction safety, and reducing construction costs;

[0022] 2) The present invention assembles an annular detection part on the outside of the mobile pallet to detect the horizontal translation of the wind duct during lifting, and detects the angular deviation of the wind duct through the angle deviation detection component on the annular detection part, 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 wind duct when lifting the wind duct, thereby ensuring that the wind duct can be smoothly assembled with the octagonal beam of the steel structure platform. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0025] Figure 3 It is a structural schematic diagram of the air duct and the protective net of the present invention;

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

[0027] Figure 5 is a schematic diagram of a top view of the structure of a horizontal offset detection assembly of the present invention;

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

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

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

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

[0032] In the figure: 1, crane; 2, mobile pallet; 3, horizontal offset detection component; 4, angular offset detection component; 5, positioning member; 11, walking mechanism; 12, slewing mechanism; 13, boom; 14, amplitude change mechanism; 15, lifting mechanism; 31, outer arc plate; 32, inner arc plate; 33, pressure detection member; 34, slot; 35, block; 36, locking member; 37, swing limit member; 38, locking member; 39, limit slot; 41, arc table; 42, arc Rack; 43, slide; 44, gear; 45, drive member; 46, telescopic member; 47, proximity switch; 48, slide rail; 151, assembly frame; 152, hook body; 153, drive motor; 154, stopper; 155, 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 DESCRIPTION

[0033] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field 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, which is used to assemble the air duct D and the protective net N of the fan system of the air cooling system, and to hoist the air duct D. The air cooling system includes a main support structure and a fan system hoisted on the top of the main support structure, the fan system has a plurality of air ducts D clamped to the top of the main support structure, and a protective net N corresponding to the air ducts D one by one, the main support structure includes a concrete support C and a steel structure platform S arranged on the top of the concrete support C, the concrete support C has a plurality of pillars, the steel structure platform S has a plurality of plates distributed in a rectangular array, each of the plates is provided with an octagonal assembly hole, an octagonal beam is fixed in the assembly hole, and a channel steel is provided on each side of the octagonal beam, the channel steel is used to clamp the air duct D, a clamping component corresponding to the channel steel is provided on the top of the air duct D, reinforcing ribs are evenly arranged on the outside of the air duct D, and the four corners of the bottom of each top plate are connected to the pillars of the concrete support C. The construction equipment includes a crane 1 for hoisting a wind tube D, and a mobile tray 2 for supporting the wind tube D and a protective net N. A plurality of universal wheels are evenly arranged at the bottom of the mobile tray 2, and a plurality of horizontal offset detection components 3 are arranged on the outer side of the mobile tray 2, wherein one of the horizontal offset detection components 3 is provided with an angle offset detection component 4. The plurality of horizontal offset detection components 3 are docked in pairs to form an annular detection member surrounding the wind tube D. The crane 1 includes a traveling mechanism 11, a slewing mechanism 12 arranged on the traveling mechanism 11, a boom 13 arranged at the output end of the slewing mechanism 12, a variable amplitude mechanism 14 for adjusting the inclination angle of the boom 13, and a lifting mechanism 15 arranged on the boom 13, wherein the lifting mechanism 15 is composed of a winch and a hook assembly.

[0036] Before the crane 1 lifts the wind duct D, the wind duct D and the protective net N are assembled on the mobile pallet 2, and the mobile pallet 2 is pushed to the bottom of the corresponding octagonal beam. The number of horizontal offset detection components 3 is preferably four, and the horizontal offset detection components 3 are spliced ​​on the outer side of the mobile pallet 2 to form an annular detection component surrounding the wind duct D. The annular detection component is an inner and outer double-layer structure, and four positioning components 5 are provided on the outer side of the annular detection component. Before lifting the wind duct D, each positioning component 5 on the annular detection component is respectively abutted against the surrounding pillars to fix the outer structure of the annular detection component. When the crane 1 lifts the wind duct D, if the wind duct D has a horizontal 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 wind duct D can be measured by the annular detection component. The 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 wind tube D is preferably eight. After the horizontal offset correction is completed, the position of the reinforcing ribs is measured by the angle offset detection component 4 to determine the angle offset of the wind tube, and the angle offset of the wind tube D is measured to adjust the lifting angle of the crane 1. The lifting angle of the wind tube D is adjusted to the misalignment angle. At this misalignment angle, the clamping parts of the wind tube D are misaligned with the channel steel to ensure that the clamping parts can be lifted above the channel steel. When the crane 1 lifts the wind tube D to the set height, the clamping parts are located above the channel steel. At this time, the crane 1 rotates the wind tube D by a certain angle so that the clamping parts on the wind tube D correspond to the channel steel. After the wind tube D is lifted, the clamping parts are embedded in the channel steel to complete the lifting of the wind tube D.

[0037] Specifically, if Figure 4-6 As shown, the horizontal offset detection assembly 3 includes an outer arc plate 31 and an inner arc plate 32, and a pressure detection member 33 disposed between the outer arc plate 31 and the inner arc plate 32. A plurality of universal wheels are disposed at the bottom of the outer arc plate 31 and the inner arc plate 32. A positioning member 5 is disposed at one end of the bottom of the outer arc plate 31. The positioning member 5 can abut against the main supporting structure to fix the outer arc plate 31. A clamping groove 34 is disposed at one end of the outer arc plate 31 and the inner arc plate 32, and a clamping block 35 is disposed at the other end of the outer arc plate 31 and the inner arc plate 32. A locking member 36 corresponding to the clamping groove 34 is disposed on the outer arc plate 31 and the inner arc plate 32. When the clamping block 35 is embedded in the clamping groove 34, the locking member 36 corresponding to the clamping groove 34 can lock the clamping block 35. The pressure detection member 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 splicing the horizontal offset detection assembly 3, the block 35 on the inner arc plate 32 is embedded in the slot 34 on the other inner arc plate 32 adjacent thereto, and the block 35 on the outer arc plate 31 is embedded in the slot 34 on the other outer arc plate 31 adjacent thereto, and the block 35 is locked by the locking member 36. The locking member 36 is preferably an electric push rod, and the block 35 is provided with a through hole corresponding to the output shaft of the electric push rod, and the slots 34 of the outer arc plate 31 and the inner arc plate 32 are both provided with countersunk holes, and the output shaft of the electric push rod is inserted into the countersunk holes after passing through the through hole of the block 35, which can improve the locking effect. After the horizontal offset detection assembly 3 is spliced, the four inner arc plates 32 form the inner layer structure of the annular detection member, and the four outer arc plates 31 form the outer layer structure of the annular detection member. The positioning member 5 is preferably a hydraulic cylinder, and 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 pillar of the concrete support C, and the outer arc plate 31 is fixed by the four positioning members 5. When the wind tube D is hoisted, after the wind tube D is horizontally offset, pressure is applied to one side of the inner structure composed of the inner arc plate 32. The compressed inner arc plate 32 squeezes the second cylinder 332, and the second cylinder 332 slides toward the inside of the first cylinder 331, and squeezes the pressure sensor 333 through the first spring 334. The crane 1 has a control system wirelessly connected to the pressure sensor 333. The control system determines the force magnitude and force direction of the inner structure of the annular detection member through the detection results of each pressure sensor 333. The crane 1 adjusts the boom 13 according to the force magnitude and force direction of the inner structure to correct the horizontal offset during hoisting. When the pressure measured by each pressure sensor 333 is less than the set value, the correction of the horizontal offset is completed. The annular detection part can also play a wind-proof role when lifting the wind tube D. When the crane 1 lifts the wind tube D, the center of gravity of the object suspended by the boom 13 is on the wind tube D. When the annular detection part is not set, the wind force acting on the wind tube D is relatively strong. Therefore, when the annular detection part is set, the influence of the wind force on the lifting position correction effect can be significantly reduced.

[0039] See also Figure 7The angle offset detection component 4 includes an arc table 41 fixed on the top of one of the outer arc plates 31, an arc rack 42 fixed on the arc table 41, a slide 43 slidably arranged on the top of the arc table 41 along the circumferential direction, a gear 44 rotated on the inner side of the slide 43, a driving member 45 for driving the gear 44 to rotate, the driving member 45 is preferably a motor and a worm gear transmission assembly arranged at the output end of the motor, the worm wheel of the driving member 45 is fixed to the gear 44 through a rotating shaft, a telescopic member 46 fixed on the top of the slide 43, a contact proximity switch 47 fixed at one end of the telescopic member 46, and an angle detection member arranged on the slide 43, the telescopic member 46 is preferably an electric push rod, the gear 44 and the arc rack 42 are meshed with each other, and an arc slide rail 48 is also fixed on the top of the arc table 41, and the slide 43 is slidably connected to the slide rail 48. When measuring the angle deviation, the wind tube D is lifted, and the telescopic member 46 is stretched to bring the proximity switch 47 close to the wind tube D. Then the driving member 45 drives the gear 44 to rotate, and the gear 44 is meshed with the arc-shaped rack 42 to drive the slide 43 to slide along the slide rail 48. When the proximity switch 47 touches the reinforcing rib on the wind tube D, the angle detection member can detect the angle change of the slide 43. The angle detection member is preferably an angle sensor. In addition, in some other embodiments, the angle detection member can also be a Hall sensor for detecting the number of rotations of the motor output shaft of the driving member 45. After the angle detection member completes the detection, it sends the detection result to the control system of the crane 1, so that the crane 1 adjusts the angle of the hook assembly and the wind tube D.

[0040] Furthermore, if 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, and a group of locking members 38 corresponding to the swing limiting component 37 is provided on the top of the outer arc plate 31. Two groups of limiting grooves 39 are respectively provided on both sides of the swing limiting component 37. Second springs 335 are provided on both sides of the first cylinder 331. One 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, the swing of the first cylinder 331 can be limited. The first spring 334 is used to compress the pressure sensor 333 and is also used to cooperate with the second spring 335 to provide a reset elastic force to the pressure detection component 33, thereby reducing the shaking of the wind tube D when adjusting the horizontal offset. A plug hole corresponding to a group of locking members 38 is provided on the top of the outer arc plate 31. 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, so that the swing limiting component 37 can be locked, and the swing limiting component 37 can limit the swing of the first cylinder 331 and the second cylinder 332, which is convenient for assembling 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 close to the opening of the swing limiting component 37, so that the swing limiting component 37 can be locked again, and the restriction on the first cylinder 331 and the second cylinder 332 can be released.

[0041] In addition, the hook assembly includes an assembly frame 151, a hook body 152 rotatably arranged at the bottom of the assembly frame 151, a driving motor 153 fixedly arranged on the inner side of the assembly frame 151, and an output end of the driving motor 153 fixedly arranged at the top of the hook body 152. The lifting mechanism 15 also includes a stopper 154 rotatably arranged at one side of the hook body 152, and a fixed pulley 155 rotatably arranged at the top of the assembly frame 151 and connected to the winch. In the case that the wind tube D is relatively light, the hook body 152 can be rotated by the driving motor 153 to adjust the angle of the wind tube D. If the wind tube D is relatively heavy, the crane 1 can also be controlled by the walking mechanism 11 to move along an arc trajectory with the hook body 152 as the rotation center, thereby adjusting the angle of the wind tube D.

[0042] Second embodiment

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

[0044] Step S1, first conduct a basic acceptance of the materials of the air cooling system. After the basic acceptance is completed, the steel structure platform components are checked and assembled to 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, the concrete support C is constructed, and then the steel staircase and the steel structure platform S are assembled and hoisted on the ground.

[0045] Step S2, install the fan system on the steel structure platform S, first assemble and hoist the wind duct D and the protective net N on the ground, then install the condensate pipe and the cleaning water pipe at the bottom of the concrete support C, then install the platform walkway paving and the fan cover, and finally assemble and hoist the fan bridge and the fan body on the ground.

[0046] Step S3, assemble and install the pipeline system, which includes a steam distribution pipe and an exhaust steam pipe. An A-type frame is installed on the steel structure platform S, and an exhaust steam pipe and a lower header connected to the steam turbine are installed below the A-type frame. A steam distribution pipe connected to the exhaust steam pipe is installed in the A-type frame. After the steam distribution pipe is installed, the exhaust pipe and the support bracket, the partition wall and the lower sealing structure of the exhaust steam pipe, the vacuum pipeline, the condensate pipeline, the flash tank and the temperature reduction and pressure reduction pipeline, the ladder and the maintenance platform, as well as the A-type inter-row walkway, the windbreak wall and the door body are installed in sequence. Finally, the pipeline system is subjected to a closed test. Other pipelines include heat exchange pipelines, flash tanks and flash tank related pipelines, and temperature reduction and pressure reduction pipelines. After the completion and acceptance, the modular assembly construction of the air cooling system is completed.

[0047] Among them, the exhaust steam pipeline is the main pipeline that the steam from the lower outlet of the steam turbine passes through. It goes from the plant to the steam distribution pipe located on the top of the A-frame in the air cooling tower. The steam distribution pipe is connected in series with the radiator tube bundles installed on both sides of the A-frame. The steam is cooled by the radiator and condensed into water, which is collected in the lower header box connected below the radiator tube bundle. Finally, it is collected and recycled to the condensate tank in the plant. The exhaust pipe is a small pipe that discharges the air in the pipeline system when steam is input during the startup of the steam turbine. The support bracket is the bracket of these small pipes. The vacuum pipeline and condensate pipeline are both small pipeline systems attached to the exhaust steam pipeline. The condensate pipeline is connected to the lower header box, and then connected to the condensate tank after merging. The flash tank is located at the lower end of the turbine and is also attached to the exhaust steam pipeline. The temperature and pressure reduction pipeline is also attached to the exhaust steam pipeline, and the temperature and pressure are lowered through the temperature and pressure reduction device. The cleaning pipeline is separate, and there is a cleaning water pump in the factory for pressurization. It is mainly used to flush and clean the dust and soil on the surface of the radiator fins on the A-frame.

[0048] During the process of hoisting the wind duct D, the wind duct D is first hoisted by the crane 1. Before the crane 1 hoists the wind duct D, the wind duct D is assembled with the protective net N on the mobile pallet 2, and multiple horizontal offset detection components 3 are docked in pairs to form an annular detection component surrounding the wind duct D. When the crane 1 hoists the wind duct D, the horizontal offset of the wind duct D is measured by the annular detection component, and the angular offset of the wind duct D is measured by the angular offset detection component 4, so that the crane 1 adjusts the lifting position and lifting angle, and then hoist the wind duct D to the steel structure platform S. An octagonal beam corresponding to the wind duct D is provided on the steel structure platform S, and channel steel is provided on the octagonal beam. A clamping component corresponding to the channel steel is provided on the wind duct D. When adjusting the lifting position and the lifting angle, the crane 1 adjusts the lifting position of the wind duct D to directly below the corresponding octagonal beam, and adjusts the lifting angle of the wind duct D to the misalignment angle. When the crane 1 lifts the clamping component of the wind duct D to above the channel steel, the wind duct D is rotated so that the clamping component is facing the channel steel, and then the wind duct D is lifted.

[0049] During the assembly and installation of steel stairs, in order to ensure the smooth installation of the air cooling system in the air, the steel stairs should be installed in time. Most steel stairs are frame structures, which are either made on site or assembled from components. They should be assembled on the ground and assembled into an integral staircase structure. According to the weight and height of the stairs, a crane with a suitable tonnage should be selected 1, and then the steel staircase frame should be hoisted into place. After the steel staircase frame is fixed, the ladder beams and step grilles should be installed in detail according to the construction drawings.

[0050] During the assembly and installation of the steel structure platform, as many components as possible should be pre-assembled on the ground and lifted into place as a whole within the scope permitted by on-site construction conditions. During pre-assembly, temporary fixation can be performed using fixtures, clamps, overshoots, cables, and fall chains. The appropriate site and lifting equipment should be selected based on the length, width, and height of the pre-assembled steel frame and the maximum weight of a single piece. The steel structure platform S is assembled using sleepers, steel sections, and support stools. The steel structure platform S is required to be sufficiently strong, and the flatness of the steel structure platform S should be less than L / 1000 and less than or equal to 2.0mm. When installing the octagonal beam support component of the fan, after the octagonal beam is installed, the distance between the octagonal beams in the horizontal, longitudinal, and diagonal directions (the center distance of the mounting bolt holes on the octagonal beam plate) should be measured to ensure that the distances in the four directions are consistent and the error does not exceed 3mm.

[0051] During the combined installation of the wind tube D and the guard net N, after the platform main beam is installed and accepted, the fan system is installed. First, the fan guard net (including the grille) is assembled on the ground, and then the wind tube is assembled to form a complete wind tube D with the guard net N and placed directly below the actual installation position. During the hoisting, the crane 1 is outside the steel structure platform S, and the hook body 152 vertically lifts the wind tube D from 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, so that the wind tube D is connected to the steel structure platform S.

[0052] During the installation of the fan body and its bridge, first assemble the fan bridge on the ground. The fan bridge consists of a bridge body, railings, pedal grids, etc. The fan body includes a motor, gear box, fan hub and blades. The fan body can be pre-assembled on the fan bridge platform and then leveled and aligned. The railings, grille plates and gear box supports are assembled and installed together, and leveled. After the fan bridge is assembled, install the fan gearbox and the upper motor and fix them. Finally, use a crane to hoist the entire fan bridge to the installation position above the wind tube. After leveling and alignment, tighten the base bolts of the fan bridge. When the overall assembly of a fan unit bridge is completed, the fan bridge assemblies of other units can be hoisted into place until all are installed.

[0053] The upper steel structure of the steel structure platform S is mainly an A-frame, which serves as the main load-bearing structure for the exhaust steam pipeline and steam distribution pipe. Generally, the air cooler is divided into 3 or 4 rows, and each row of A-frames is a steel structure assembly structure. The highest installation point can reach 30-40 meters. In order to reduce high-altitude assembly operations, ground assembly is adopted as much as possible. A row of A-frames can be divided into 3 parts, which are assembled on the ground and hoisted separately. Before hoisting, the high-strength bolts at the connection nodes are tightened and inspected. The sections are hoisted into place on the platform, and then a row of A-frames are connected into a whole with longitudinal tie rods and diagonal supports to improve efficiency, reduce the frequency of high-altitude operations, and ensure construction safety.

[0054] During the assembly and installation of the windbreak wall, the windbreak wall needs to be constructed after the steam distribution pipe is installed. Before the steel structure of the windbreak wall is hoisted in place, temporary fixing measures need to be added to the windbreak wall until the fixing is completed. After the top tie rod and support are firmly welded to the steam distribution pipe, the temporary reinforcement measures will be removed. The windbreak wall wind-resistant columns, purlins and supporting components should be pre-assembled on the ground and then hoisted and installed. Before the final tightening of the windbreak wall, it is necessary to measure and record the hole spacing at the base of the windbreak wall. According to this measurement record, the width of the windbreak wall is determined, and the columns should be adjusted. The windbreak wall assembled on the ground is hoisted to the platform windbreak base and fixed, and the tie rod is connected to the steam distribution pipe bundle or the top support is connected to the top of the A-frame, and the windbreak walls are connected to each other with bolts. Finally, according to the windbreak wall installation drawing and the "color steel plate layout drawing", the color steel plate is fastened to the corresponding windwall with self-drilling screws.

[0055] The exhaust steam pipeline is divided into several parts, including tree-shaped four-way, diversion elbow, expansion joint and transition joint and other special-shaped parts. The diameter is more than 3 meters, and the installation position is between the compressor plant and the air cooling system, connected in series with the steam turbine and the steam distribution pipe of the air cooling system. The installation space is small and there is no crane station, but the height reaches 30 meters. If each section is installed separately, it is necessary to set up a 12m*6m*30m double-row scaffolding with the installation components for the exhaust gas pipeline installation and welding. Therefore, the components and pipe sections should be combined into three assemblies on the ground (tree-mounted four-way assembly section, two sections with expansion joint elbow assembly section), and finally select a suitable crane to hoist the assembly section into a whole. Note that the expansion joint needs to be reinforced before hoisting to prevent the original tie rod of the expansion joint from being disengaged and damaged.

[0056] The steam distribution pipe is 35 meters long and is installed on the A-frame and above the heat exchange tube bundle. The installation operation is relatively high. The incoming materials are pipe sections of different diameters, which should be combined into three sections on the ground near both sides of the air cooling system. Use a suitable large crane and a reasonable position for overall lifting.

[0057] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A modular assembly construction equipment for an air cooling system, the air cooling system comprising a main support structure and a fan system hoisted on the top of the main support structure, the fan system having a plurality of wind tubes connected to the main support structure and a protective net corresponding to the wind tubes, characterized in that: The construction equipment comprises a crane (1) for hoisting a wind tube, and a mobile tray (2) for supporting the wind tube and a protective net, wherein a plurality of horizontal offset detection components (3) are arranged on the outer side of the mobile tray (2), and an angle offset detection component (4) is arranged on one of the horizontal offset detection components (3); Before the crane (1) lifts the wind tube, the wind tube and the protective net are assembled on the movable pallet (2), and a plurality of the horizontal offset detection components (3) are connected in pairs to form an annular detection component surrounding the wind tube. When the crane (1) lifts the wind tube, the horizontal offset of the wind tube is measured by the annular detection component, and the angular offset of the wind tube is measured by the angular offset detection component (4), so that the crane (1) can adjust the lifting position and lifting angle.

2. The modular assembly construction equipment for air cooling system according to claim 1 is characterized in that: The horizontal offset detection assembly (3) comprises an outer arc plate (31) and an inner arc plate (32), and a pressure detection member (33) arranged between the outer arc plate (31) and the inner arc plate (32); a positioning member (5) is provided on the outer arc plate (31); and the positioning member (5) is capable of abutting against the main body support structure to fix the outer arc plate (31).

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

4. The modular assembly construction equipment for air cooling system according to claim 2 is characterized in that: The pressure detection member (33) comprises a first cylinder (331) hinged to the inner side of the outer arc plate (31), a second cylinder (332) slidably arranged on one side of the first cylinder (331), and a pressure sensor (333) and a first spring (334) arranged between the first cylinder (331) and the second cylinder (332).

5. The modular assembly construction equipment for air cooling system according to claim 4 is characterized in that: A swing limiting component (37) corresponding to the first cylinder (331) is slidably provided on the outer arc plate (31), and a group of locking parts (38) corresponding to the swing limiting component (37) is provided on the top of the outer arc plate (31), two groups of limiting grooves (39) are respectively provided on both sides of the swing limiting component (37), and second springs (335) are provided on both sides of the first cylinder (331), and one end of the second spring (335) away from the first cylinder (331) is connected to the inner side of the outer arc plate (31), and when the swing limiting component (37) slides radially along the outer arc plate (31) and approaches the inner arc plate (32), the swing of the first cylinder (331) can be limited.

6. The modular assembly construction equipment for air cooling system according to claim 2, characterized in that: The outer side of the wind tube is evenly provided with reinforcing ribs. The angle deviation detection component (4) comprises an arc platform (41) fixedly arranged on the top of one of the outer arc plates (31), an arc rack (42) fixedly arranged on the arc platform (41), a slide (43) slidably arranged on the top of the arc platform (41) along the circumferential direction, a gear (44) rotatably arranged on the inner side of the slide (43), a driving member (45) for driving the gear (44) to rotate, a telescopic member (46) fixedly arranged on the top of the slide (43), a proximity switch (47) fixedly arranged at one end of the telescopic member (46), and an angle detection member arranged on the slide (43). The gear (44) and the arc rack (42) are meshed with each other. When the proximity switch (47) touches the reinforcing rib on the wind tube, the angle detection member can detect the angle change of the slide (43).

7. The modular assembly construction equipment for air cooling system according to claim 1, characterized in that: The crane (1) comprises a traveling mechanism (11), a slewing mechanism (12) arranged on the traveling mechanism (11), a boom (13) arranged at the output end of the slewing mechanism (12), a luffing mechanism (14) for adjusting the inclination angle of the boom (13), and a lifting mechanism (15) arranged on the boom (13); the lifting mechanism (15) comprises a hoist and a hook assembly, and the hook assembly comprises an assembly frame (151), a hook body (152) rotatably arranged at the bottom of the assembly frame (151), a driving motor (153) fixedly arranged on the inner side of the assembly frame (151), the output end of the driving motor (153) fixedly arranged at the top of the hook body (152); the lifting mechanism (15) further comprises a stopper (154) rotatably arranged at one side of the hook body (152), and a fixed pulley (155) rotatably arranged at the top of the assembly frame (151) and connected to the hoist.

8. 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 of the air cooling system according to claim 7, and the construction method comprises the following steps: S1. Build the main support structure of the air cooling system, which includes a concrete support, a steel staircase and a steel structure platform. First, construct the concrete support, and then assemble and hoist the steel staircase and the steel structure platform on the ground; S2. Install a fan system on the steel structure platform, wherein the fan system includes a wind tube, a protective net, a fan cover, a fan bridge and a fan body, and assemble and hoist the wind tube, the protective net, the fan cover, the fan bridge and the fan body on the ground; S3. Combining and installing the piping system, which includes a steam distribution pipe and an exhaust steam pipe, installing an A-type frame on the steel structure platform, installing an exhaust steam pipe and a lower header connected to the steam turbine under the A-type frame, and installing a steam distribution pipe connected to the exhaust steam pipe in the A-type frame; During the process of hoisting the wind tube, the wind tube is first hoisted by a crane (1). Before the crane (1) hoists the wind tube, the wind tube and the protective net are assembled together on a movable pallet (2), and a plurality of horizontal offset detection components (3) are docked in pairs to form an annular detection component surrounding the wind tube. When the crane (1) hoists the wind tube, the horizontal offset of the wind tube is measured by the annular detection component, and the angular offset of the wind tube is measured by the angular offset detection component (4), so that the crane (1) adjusts the hoisting position and hoisting angle, and then the wind tube is hoisted onto the steel structure platform.

9. The modular assembly construction method for an air cooling system according to claim 8, characterized in that: In step S2, the wind tube and the protective net are first assembled and hoisted on the ground, then the condensate pipe and the cleaning water pipe are installed at the bottom of the concrete support, and then the platform walkway paving and the fan cover are installed, and finally the fan bridge and the fan body are assembled and hoisted on the ground; In step S3, after the steam distribution pipe is installed, the exhaust pipe and support brackets, the partition wall and the lower sealing structure of the exhaust steam pipe, the vacuum pipeline, the ladder and the maintenance platform, as well as the A-type inter-row walkway, the windbreak wall and the door body are installed in sequence, and finally the pipeline system is subjected to a sealing test.

10. The modular assembly construction method for an air cooling system according to claim 9, characterized in that: The steel structure platform is provided with an octagonal beam corresponding to the wind tube, the octagonal beam is provided with a channel steel, and the wind tube is provided with a clamping component corresponding to the channel steel. When adjusting the lifting position and the lifting angle, the crane (1) adjusts the lifting position of the wind tube to just below the corresponding octagonal beam, and adjusts the lifting angle of the wind tube to a misaligned angle. When the crane (1) lifts the clamping component of the wind tube to above the channel steel, the wind tube is rotated so that the clamping component faces the channel steel, and then the wind tube is lifted and placed.

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