Adsorption-type underwater space station for non-stop water repair of large open channels and use method thereof

Abstract

The present invention discloses an adsorption-type underwater space station for non-stop water repair construction of large open channels and a method for using the same, comprising a dome, with side wings respectively installed at the bottom of both sides of the dome, vacuum suction cup arrays installed on the side wings, the vacuum suction cup arrays connected to a vacuum pump, an air bag installed on the upper surface of the dome, a water pump assembly provided inside the dome; and a sealing and water-stopping assembly fixedly provided at the edge of the bottom surface of the dome. Compared with the prior art, the advantages of the present invention are: 1. A lightweight dome structure is adopted to meet the compressive strength of the unit structure, and the anti-buoyancy stability of the underwater space station is effectively enhanced by the huge vacuum adsorption force of the vacuum suction cup array; 2. The overall underwater rapid sinking and movement of the space station is carried out by providing air bags and controlling the vacuum degree of the vacuum suction cup array; 3. The present invention can form three types of space stations; 4. The vacuum suction cup array is provided on the side wings of the dome side, and the force of the entire structure is evenly distributed on the wings, reducing damage to the open channel lining plate structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of deep-water open channel repair, and in particular relates to an adsorption-type underwater space station for repairing large open channels without stopping water, and a method for using the station. Background Art

[0002] Large, long-distance open channels can experience damage, fractures, and collapses in the channel slope lining when exposed to extreme weather or geological disasters. However, water outages are generally not permitted for repairs during the water supply period. Conventional cofferdam construction is technically challenging for deep open channel slope repairs without interrupting the flow of water. The immense water pressure on the upstream side requires a strong cofferdam structure, while its large size limits flow and renders it unusable. Using steel cofferdams also fails to address the conflict between lateral support and the impact of the repair work area. A comprehensive review of domestic and international technical documentation has yielded no suitable construction methods, necessitating the development of an efficient and convenient technology to protect the construction environment. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides an adsorption-type underwater space station for non-stop water repair of large open channels and a method of using the same. The vacuum adsorption force is used to resolve the contradiction between the lightweight dome structure and the anti-floating stability of the space station and the bottom sealing and water-stopping requirements. It is convenient for the installation of the space station and ensures the underwater sealing and stability of the space station, and can realize the installation of an efficient, fast, safe and energy-saving open channel underwater maintenance space station.

[0004] The object of the present invention is achieved in the following manner:

[0005] The invention relates to an adsorption-type underwater space station used for non-stop water repair construction of large open channels, comprising a dome, with side wings installed at the bottom of both sides of the dome, vacuum suction cup arrays installed on the side wings, and vacuum suction cup arrays connected to a vacuum pump, an air bag installed on the upper surface of the dome, and a water pump assembly provided inside the dome; a sealing water-stop assembly is fixedly provided at the edge of the bottom surface of the dome.

[0006] The dome has no bottom surface and its upper end surface is open, the lower end surface of the dome is closed, and a bottom wing is installed on the outer bottom of the lower end surface, and a vacuum suction cup array is installed on the bottom wing.

[0007] A secondary anti-seepage component is provided at the bottom of the inner side of the dome.

[0008] The secondary anti-seepage component includes an anti-seepage wall close to the inner wall of the dome, an anti-seepage ditch is formed between the anti-seepage wall and the inner side of the dome, and a drainage pipe is arranged in the anti-seepage ditch.

[0009] A vertical flexible connector is installed on the top of the anti-seepage wall, the top of the vertical flexible connector is connected to the dome, a supporting rod is connected between the top of the side of the anti-seepage wall and the dome, and a horizontal flexible connector is connected to the side of the anti-seepage wall, and the other end of the horizontal flexible connector is connected to the dome.

[0010] The sealing and water-stopping assembly comprises a dome base connected to the bottom of the dome, and a waterproof rubber pad is connected below the dome base.

[0011] An upper groove is provided in the middle of the lower surface of the dome base, and a lower groove with upper and lower openings is provided in the middle of the upper surface of the waterproof rubber pad. The upper groove and the lower groove are positioned corresponding to each other and are connected to form a sealed cavity. An inflatable rubber is provided in the sealed cavity, and a cavity is provided in the inflatable rubber. An inflation pipeline for inflation is provided in the cavity. The inflation pipeline passes through the inflatable rubber and the dome base in sequence and extends out from the cavity. The protruding end of the inflation pipeline is connected to an air source and an inflation pump.

[0012] The outer side wall of the side wing is equipped with a telescopic guide wheel for facilitating the movement of the adsorption-type underwater space station. The telescopic guide wheel includes a guide wheel, the top of which is connected to a cylinder with a piston rod facing downward, and the top of the cylinder is fixed to the side wing.

[0013] A lighting lamp assembly and a construction water tap assembly are installed in the dome.

[0014] The dome is assembled from dome segment I, dome segment II, dome segment III and the lower end face dome.

[0015] Waterproof bearings are installed on both sides of the arched lower end side surface near its lower end surface, and a drive shaft is installed in the waterproof bearing. One end of the drive shaft is located outside the dome and is connected to an impeller extending into the open channel water, and the other end of the drive shaft is connected to an internal exhaust fan; external exhaust fans are installed on both sides of the inner side surface of the arched upper end of the dome near its outer end.

[0016] The method for using the adsorption-type underwater space station for repairing a large open channel without stopping water flow comprises the following steps:

[0017] a) Clean the edges of the area to be repaired on the slope of the open channel to facilitate the operation of the suction cup;

[0018] b) The dome is loaded onto a truck and transported to the nearest road to the designated repair area. It is then craned to the bank of the channel, assembled downstream, and the airbags inflated. The onshore winch cables are then connected around the dome. The winch cables pull the station to the designated repair area, and the airbags are deflated, allowing the station to sink into position within the repair area.

[0019] c) Use a vacuum pump to evacuate each suction cup of the vacuum cup array to the expected vacuum level, and check the suction force to ensure it meets the design requirements for the space station's anti-floating stability;

[0020] d) Use the water pump assembly to drain all accumulated water inside the space station into the channel;

[0021] e) Construction workers and construction machinery then enter the site and begin slope repair work;

[0022] f) After the repair is completed, the construction personnel and construction machinery withdraw. By inflating the suction cups of the vacuum suction cup array, the recoil force of the gas forms an air cushion until the space station is restored to a mobile state. The airbags are inflated, and the space station moves downstream to the next maintenance work area with the help of the telescopic guide wheels and connected cables on the space station. The airbags are then deflated and the telescopic guide wheels are retracted. Steps a), c) to e) are then repeated.

[0023] g) After all repair work is completed, the vacuum cups of the vacuum cup array are adjusted to remove the suction force. The airbags are inflated and connected to the cables to adjust the station's attitude to a downstream docking state. The airbags are then deflated, and the various parts of the dome are disassembled. The cranes lift the parts piece by piece onto trucks and pull them back to the storage warehouse.

[0024] Compared with the prior art, the advantages of the present invention are as follows:

[0025] 1. First, a lightweight dome structure is adopted to meet the compressive strength of the unit structure. At the same time, vacuum suction cup arrays are installed on the bottom and side wings located at the bottom and outside of the dome respectively. Based on the vacuum adsorption principle, the huge vacuum suction force of the vacuum cup array effectively enhances the anti-buoyancy stability of the underwater space station.

[0026] 2. By setting up air bags and controlling the vacuum level of the vacuum cup array, the entire space station can be quickly lowered and moved underwater;

[0027] 3. The present invention can form three types of underwater waterless operation space units that meet the basic requirements of slope repair construction space: slope repair type A, semi-channel repair type B, and full-channel repair type C;

[0028] 4. The vacuum cup array is installed on the side wings of the dome to evenly distribute the force of the entire structure on the wings, reducing damage to the open channel lining structure;

[0029] 5. Compared with traditional deep-water open channel maintenance, this invention can save 25% to 50% of funds. The technology of the adsorption-type underwater space station has broad application prospects and huge social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention.

[0031] Figure 2 3 are three usage state diagrams of the present invention.

[0032] Figure 3 It is a cross-sectional view of the present invention.

[0033] Figure 4 It is a longitudinal skeleton diagram of the present invention.

[0034] Figure 5 It is a structural schematic diagram of the anti-seepage ditch part of the present invention.

[0035] Figure 6 This is an overhead view of the numerical simulation of the space station.

[0036] Figure 7 It is a three-dimensional image of the numerical simulation of the space station.

[0037] Figure 8 This is a top view of the numerical simulation of the space station skeleton.

[0038] Figure 9 This is a schematic diagram of the layout of the vacuum suction cup array.

[0039] Figure 10 This is the effect diagram after simulating the most dangerous working condition of the dome and applying loads and constraints to the space station structure.

[0040] Figure 11 This is a schematic diagram of the third principal stress applied after numerical simulation of the space station.

[0041] Figure 12 This is a diagram of the bending moment values ​​of the beam around the central axis simulated by the space station.

[0042] Figure 13 It is the verification result of the structural deformation and deflection of the space station simulation.

[0043] Figure 14 It is the flow field of underwater A-type space station obtained by three-dimensional hydrodynamic numerical simulation.

[0044] Figure 15 It is the surface flow pattern and water depth distribution of the flow field where the Type A space station is located.

[0045] Among them, 1. dome, 2. side wings, 3. bottom wings, 4. vacuum suction cup array, 5. exhaust fan assembly, 6. airbag, 7. telescopic guide wheel, 8. faucet assembly, 9. secondary anti-seepage assembly, 10. lighting assembly, 11. water pump assembly, 12. open channel slope; 101. dome segment I, 102. dome segment II, 103. dome segment III, 104. upper chord, 105. lower chord, 106. web, 107. lower end face dome, 108. supporting connecting rod, 109. dome base, 110. waterproof rubber pad, 111. inflatable rubber, 112. inflatable pipeline; 401. connecting pipe, 701. cylinder, 901. anti-seepage wall, 902. drainage pipe, 903. horizontal flexible connector, 904. outer rubber, 905. vertical flexible connector. DETAILED DESCRIPTION

[0046] In the present invention, the higher point of the space station when it is placed on the slope of the open channel is regarded as the upper point, and the lower point is regarded as the lower point.

[0047] like Figure 1 As shown, an adsorption-type underwater space station for repairing large open channels without stopping water includes a dome 1. The dome 1 can be opened at both ends, such as Figure 2 The C-type space station shown in FIG. 1 may also have an opening only on the upper end face, such as Figure 2 In the type A or type B space station shown, side wings 2 are respectively installed at the bottom of the two sides of the dome 1, and a vacuum suction cup array 4 is installed on the side wings 2. The vacuum suction cup array 4 is connected to a vacuum pump (not shown in the figure). This vacuum pump is a water-gas separation pump, which is used to extract water from the suction cup to form vacuum adsorption. An air bag 6 is installed on the upper surface of the dome 1, and a water pump assembly 11 is provided inside the dome 1; a sealing water-stop assembly is fixedly provided at the edge of the bottom surface of the dome 1, and the sealing water-stop assembly is used to seal and isolate the water inside and outside the space station.

[0048] In order to facilitate the repair of the side slope of the open channel, the dome 1 has no bottom surface and its upper end surface is open. The lower end surface of the dome 1 is closed, and a bottom wing 3 is installed on the outer bottom of the lower end surface. A vacuum suction cup array 4 is installed on the bottom wing 3. Figure 1 As shown, the space station is Figure 2 Type A or B.

[0049] The above-mentioned side wings 2 and bottom wings 3 can both be in the shape of a box-type structure with only the bottom surface open. The side wings 2 and bottom wings 3 are connected to the dome 1 by bolts or rivets. The above-mentioned vacuum suction cup array 4 is composed of at least two rows of suction cups connected in parallel. After each row of suction cups is connected in parallel through a connecting pipe 401, the whole is U-shaped. The suction port of the vacuum suction cup array 4 faces downward and the suction cups are arranged in the box-type side wings 2 and bottom wings 3. The above-mentioned water pump assembly 11 includes a water pump and a water pipe for pumping water out of the space station. The suction cup preferably adopts a multi-lip square suction cup, which is easy to adapt to the rougher concrete open channel. The surface of the concrete channel has defects such as pits, flanges, sand holes, etc., which are easy to leak and difficult to fit. It can also achieve tight adsorption and fitting.

[0050] The number of airbags 6 is determined based on the actual overall weight and buoyancy of the space station, cooperating with the vacuum cup array 4 to levitate and move the space station. The lower end of the dome 1 is the end that extends into the open channel, while the lower end is the upper end. For better sealing, watertight rubber seals are applied to the undersides of the side wings 2 and bottom wings 3.

[0051] The above-mentioned dome 1 adopts an elliptical shell light structure, which is composed of a covering panel and a mesh frame. The covering panel (not shown in the figure) is covered and fixed outside the frame. The frame structure is as follows Figure 3 、 Figure 4As shown, the frame includes an upper chord 104 and a lower chord 105, both of which are arched. A V-shaped web 106 is connected between the upper chord 104 and the lower chord 105. Of course, other structures are also possible. The upper chord 104 and the lower chord 105 are connected in the horizontal direction by horizontal rods or connecting rods to form a network frame structure.

[0052] In order to prevent water outside the space station from entering the interior due to poor sealing of the space station and affecting the maintenance of the open channel, a secondary anti-seepage component 9 is provided at the bottom of the inner side of the dome 1.

[0053] Further, if Figure 5 As shown, the secondary anti-seepage component 9 includes an anti-seepage wall 901 close to the inner wall of the dome 1, an anti-seepage ditch is formed between the anti-seepage wall 901 and the inner side of the dome 1, a drainage pipe 902 is provided in the anti-seepage ditch, and the drainage pipe 902 is connected to a drainage pump (not shown in the figure). The anti-seepage wall 901 is preferably in an inverted T shape, such as Figure 5 As shown, other shapes are also possible. A sealing rubber is attached to the bottom of the anti-seepage wall 901.

[0054] In order to make the anti-seepage wall 901 more firmly waterproof, as Figure 5 As shown, a vertical flexible connector 905 is installed at the top of the cutoff wall 901. The top of the vertical flexible connector 905 is connected to the dome 1. A support rod 108 is connected between the top of the side of the cutoff wall 901 and the dome 1. A horizontal flexible connector 903 is connected to the side of the cutoff wall 901. The horizontal flexible connector 903 is used to prevent the cutoff wall 901 from tilting. The other end of the horizontal flexible connector 903 is connected to the dome 1. One end of the support rod 108 is bolted to the rib of the dome 1. The other end is covered with a rubber sheath 904. The other end is embedded in a mortise and tenon groove in the cutoff wall 901. The rubber sheath 904 facilitates insertion into the mortise and tenon groove.

[0055] Preferably, the vertical flexible connector 905 is a vertically arranged compression spring, and the horizontal flexible connector 903 is a horizontally arranged tension spring.

[0056] Further, if Figure 5 As shown, the sealing and water-stopping assembly includes a dome base 109 connected to the bottom of the dome 1, and a waterproof rubber pad 110 is connected below the dome base 109. Of course, other sealing structures can also be used.

[0057] Furthermore, an upper groove (not shown) is defined in the middle of the lower surface of the dome base 109, and a lower groove (not shown) with upper and lower openings is defined in the middle of the upper surface of the waterproof rubber pad 110. The upper and lower grooves are positioned correspondingly and connected to form a sealed cavity. An inflatable rubber 111 is disposed within the sealed cavity, and a cavity is defined within the inflatable rubber 111. An inflatable pipe 112 for inflation is disposed within the cavity. The inflatable pipe 112 passes through the inflatable rubber 111 and the dome base 109 in sequence, extending outward from the cavity. The extended end of the inflatable pipe 112 is connected to an air source (not shown) and an air pump (not shown). The inflatable rubber 111, the dome base 109, and the waterproof rubber pad 110 can all extend in a circular direction along the bottom of the dome 1. The inflatable pipe 112 can be a plurality of pipes spaced apart and connected in parallel. The dome base 109 is provided with through holes for the plurality of pipes. During operation, air is inflated into the inflatable rubber 111 through the inflation pipe 112, and the inflatable rubber 111 gradually expands until it fills the gaps in the sealed cavity and seals them, forming a good sealing effect. This is the primary anti-seepage effect. The anti-seepage ditch formed by the secondary anti-seepage component 9 is the secondary anti-seepage effect. If water accidentally seeps into the side of the dome 1, the water will enter the anti-seepage ditch and be discharged through the drain pipe 902.

[0058] To facilitate the relocation of the space station, retractable guide wheels 7 are mounted on the outer walls of the wing 2. These wheels facilitate the movement of the suction-type underwater space station. These retractable guide wheels 7 include guide wheels (not shown), the top of which is connected to a cylinder 701 with a downward-facing piston rod. The top of the cylinder 701 is fixed to the wing 2. When the space station needs to be relocated, the cylinder 701 drives the guide wheels to slowly contact the open channel slope 12, simultaneously freeing the entire space station from the open channel slope 12. At this point, only the guide wheels of the space station are in contact with the open channel slope 12, and the space station can be moved using the cable on the crane winch.

[0059] In order to facilitate lighting in the space station and water use during open channel maintenance and construction, a lighting lamp assembly 10 and a faucet assembly 8 are installed in the dome 1. The lighting lamp assembly 10 and the faucet assembly 8 are both mature existing technologies and will not be described in detail here.

[0060] In order to facilitate the transportation and installation of the space station, Figure 1 、 Figure 4 As shown, the dome 1 is assembled from dome segment I 101, dome segment II 102, dome segment III 103, and a lower end dome 107. Dome segment I 101, dome segment II 102, and dome segment III 103 are each formed by longitudinally dividing the arched side of the dome 1 into three sections. The lower end dome 107 is used to seal the inner end surface of the arched side of the dome 1. Of course, the dome 1 can also be assembled in several transversely divided sections.

[0061] The space station of the present invention can be assembled into three types A / B / C according to the maintenance area required by the open channel, such as Figure 2 As shown, when one side slope or one side slope and part of the bottom slope of the open channel needs to be repaired, the dome segment I 101, the dome segment II 102, the dome segment III 103 and the lower end face dome 107 are assembled together to form Figure 2 The type A space station and type B space station shown in the figure; at this time, the space station has no bottom surface and its upper end surface is open; when the side slopes and bottom slopes on both sides of the open channel need to be repaired, it is only necessary to assemble the dome segment I 101, the dome segment II 102, and the dome segment III 103 together. At this time, both end surfaces of the bottomless space station are open.

[0062] To facilitate ventilation inside and outside the space station and provide a better construction environment for workers, waterproof bearings (not shown) are installed on both sides of the arched lower end side surface of the dome 1 near its lower end surface. A drive shaft (not shown) is installed in the waterproof bearing. One end of the drive shaft is located outside the dome 1 and is connected to an impeller (not shown) that extends into the open channel water. The other end of the drive shaft is connected to an internal exhaust fan (not shown). External exhaust fans (not shown) are installed on both sides of the inner side surface of the arched upper end of the dome 1 near its outer end. The impeller is driven by the flowing water in the open channel, providing power for the internal exhaust fan, thereby achieving energy conservation. The external exhaust fan is driven by a conventional electric motor, which is a mature existing technology and will not be described in detail here. The above-mentioned internal exhaust fan and external exhaust fan constitute the exhaust fan assembly 5.

[0063] The present invention also provides a method for using the adsorption-type underwater space station for repairing a large open channel without stopping water, comprising the following steps:

[0064] a) Use a vacuum suction pump to clean the edge of the area to be repaired on the slope of the open channel (the edge is the suction cup area) to facilitate the suction cup to work;

[0065] b) The four modules of the dome 1, namely, the dome segment I 101, the dome segment II 102, the dome segment III 103, and the lower end face dome 107, are loaded onto a truck and transported to the road nearest the designated repair area. They are then transported to the bank of the channel by crane, assembled downstream, and the airbag 6 is inflated. The cables of the onshore winch are then connected to the periphery of the dome 1. The winch cables pull the space station to the designated repair area, and the airbag 6 is deflated, allowing the space station to be positioned and sunk in the repair area.

[0066] The downstream assembly is to first assemble the dome segment I 101, the dome segment II 102, the dome segment III 103 and the lower end face dome 107 at the edge of the channel flow. At this time, the dome segment I 101, the dome segment II 102 and the dome segment III 103 are all parallel to the axial direction of the open channel.

[0067] c) Using a vacuum pump, evacuate each suction cup of the vacuum cup array 4 to the desired vacuum level, and check the suction force to ensure it meets the design requirements for the station's anti-floating stability. Simultaneously, inflate the inflatable rubber 111 to ensure that the dome 1 meets its design requirements for sealing and watertightness.

[0068] d) using the water pump assembly 11 to drain all the accumulated water inside the space station into the channel;

[0069] e) Construction workers and construction machinery then enter the site and begin slope repair work;

[0070] f) After the repair is completed, the construction personnel and construction machinery withdraw. By inflating the suction cups of the vacuum suction cup array 4, the gas recoil force forms an air cushion until the space station returns to the mobile state. The airbag 6 is inflated, and the space station moves downstream to the next maintenance work area in conjunction with the telescopic guide wheel 7 and the connected cable on the space station. The airbag 6 is then deflated and the telescopic guide wheel 7 is retracted. Then, steps a), c) to e) are repeated.

[0071] g) After the repair work is completed, the vacuum level of the vacuum cup array 4 is adjusted to remove the suction force. The airbag 6 is inflated and connected to the cable to adjust the space station's attitude to a downstream docking state. The airbag 6 is then deflated. The various parts of the dome 1 are then disassembled and lifted by crane to be loaded onto trucks and pulled back to the storage warehouse.

[0072] In order to demonstrate the technical effect of the present invention, a vacuum adsorption force test was conducted using a dome 1 of the following specifications and dimensions as an example:

[0073] 1) Dome structure design

[0074] The dimensions of the covering panels of the elliptical shell lightweight dome 1 are as follows: designed dome span: 9m, dome height: 2.6m, dome length: 22.56m, dome radius: minor axis 2.5m, major axis 4.5m. The covering panels are made of mild steel. The side wings 2 and bottom wings 3 are both composed of mild steel trusses, so they are connected by fusion welding.

[0075] The skeleton is constructed as follows: two 11.85m-long elliptical upper chords and one 10.28m-long elliptical lower chord form the main structure. Fifteen sets of web members and 16 horizontal rods are welded together to form a single truss arch. Thirteen truss arches are arranged longitudinally, spaced a certain distance apart. Longitudinal connecting rods, using fillet welds, connect the 13 trusses to form a spatial grid structure. The upper and lower chords 104 and 105 are constructed of Q235 carbon steel, Φ203 x 14 mm. The web members 106, horizontal rods, and connecting rods are all constructed of Q235 carbon steel, Φ127 x 8 mm. The total weight of the arch is comprised of four components: the 13 central truss arches, the upper panel, the three side wings with suction cups (i.e., side wings 2 and bottom wings 3), and the connecting rods between the truss arches. Based on the materials and dimensions, the arch weighs approximately 77 tons.

[0076] 2) Adsorption structure design

[0077] 1. How the Suction Cups Work: Starting the water-vapor separation pump creates negative pressure within the cups. This pressure differential generates a powerful suction force, holding the station and the slope together. When the station needs to be moved to the next repair area, air is steadily pumped into the cups, and the vacuum level is adjusted to a stable critical state, completing the station's relocation.

[0078] 2. All suction cups are square, with a side length of 100 cm. Except for the suction cup positions, the side wings 2 and bottom wings 3 are sealed with sealing strips, with a thickness of 0.3 times the side length of the suction cup.

[0079] 3. The detailed calculation process is as follows:

[0080] The side length of the suction cup used is: r = 100cm;

[0081] The area of ​​the suction cup: A = r*r = 100*100 = 10000cm 2 ;

[0082] Vacuum degree of suction cup: P=87Kpa.

[0083] 4. Calculation of suction cup adsorption force:

[0084] The relationship between the diameter D of the circular vacuum suction cup and the adsorption capacity m is:

[0085] (4-1)

[0086] Where D is the diameter of the vacuum cup (unit 1 = 25.4 mm). Since a square cup is used in practice, D is calculated as the equivalent diameter of the square cup. The calculation formula is: , where A and r are the area and side length of the square suction cup respectively;

[0087] m-mass of adsorbed material (unit 1=0.454), reflecting the adsorption capacity of the suction cup;

[0088] s - Suction cup reliability factor (usually S=2.0 for vertical extraction);

[0089] P v - Suction cup vacuum degree (unit 1 = 3386.3788), the value is 87KPa;

[0090] n-number of vacuum cups, single cup n=1.

[0091] The adsorption force of a single suction cup is: F1=mg=48.40KN, where: m is the mass of the adsorbed material in formula (4-1);

[0092] It has been measured that the buoyancy of a single suction cup is: F2=4.52KN.

[0093] The deadweight of a single suction cup: G1=0.4KN.

[0094] 5. Calculation of anti-floating stability of space station structure:

[0095] The mechanical equilibrium equation that ensures the dome-shaped space station remains stable in water is:

[0096] Along the vertical direction: ∑ F y =0 (5-1)

[0097] Along the flow direction: ∑ F x =0 (5-2)

[0098] That is: the stability condition of the dome in the floating F direction: the friction force of the dome ≥ the flow resistance.

[0099] Formula (5-2) can be written as:

[0100] f ×(F3+F2×N1)=G2+G1×N1+F1×N1×cosα (5-3)

[0101] Among them, the space station structural safety factor f Take 1.11;

[0102] α is the slope angle, cosα=0.918;

[0103] F3 is the buoyancy of the entire structure of the space station, which is the sum of the buoyancy of the entire structure of the space station and its cavity. The buoyancy of the cavity is the buoyancy of the dome cavity: F 穹拱 = ρgV= 3608 kN, where ρ is the density of water, V is the volume of the elliptical dome, and the dimensions of the elliptical dome are: length: 22.56 m, dome radius: short axis 2.5 m, long axis 4.5 m;

[0104] The self-weight of the dome structure: G2=736KN;

[0105] From formula (5-3), we can calculate the theoretical number of suction cups required: N1 = 89.9

[0106] The actual number of suction cups to be arranged is an integer: N=90.

[0107] In summary, the mechanical analysis of each part of the space station is shown in Table 1.

[0108] Table 1 Mechanical analysis of various parts of the space station

[0109]

[0110] 6. Layout of suction cup pipeline:

[0111] There are two rows of suction cups on each wing, such as Figure 1 As shown, there are 15 suction cups in each row, and each 6 suction cups form a group, sharing a main pipe. There are three rows on the bottom wing, and each row has 10 suction cups, and each 6 suction cups form a group, sharing a main pipe. Each group is a whole, and the groups work in parallel.

[0112] 3) Numerical simulation

[0113] Numerical simulation is carried out using the slope maintenance type A space station as an example:

[0114] Computational fluid dynamics software was used to conduct three-dimensional hydrodynamic numerical simulation of the open channel flow after the underwater space station was deployed. Numerical simulation technology was used to simulate the flow fields of channels with three different specifications.

[0115] During the simulation, the dome used a Q235 elliptical shell steel structure with a span of 9m, a height of 2.6m, and an arch length of 20m. It consists of four parts: 14 arch rings in the middle, an upper panel, three side wing panels, and connecting rods between the arch rings. The dome is supported by 9 horizontal beams and 4 longitudinal beams. The horizontal and longitudinal beams are made of Q235 steel, and the dome is connected to the slope with vacuum suction cups.

[0116] In the finite element model, Shell63 unit is used to simulate the dome structure. Shell63 unit is a 4-node elastic shell unit with bending and membrane characteristics, which can withstand in-plane and surface loads. The simulation effect is as follows Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 shown.

[0117] Figure 10 This is the effect diagram after applying loads and constraints to the structure in the most dangerous working condition of the dome; Figure 11 The distribution of the third principal stress in the structure is displayed, indicating that the principal stress of the structure is less than the allowable strength of the material, and the structure is safe and reliable. In other words, the structural strength calculation under the most dangerous working condition meets the safety requirements. Figure 12 This is a diagram of the bending moment of the beam around the central axis, indicating that the stability calculation meets the safety requirements; Figure 13 It is the result of the structural deformation deflection verification. The maximum deflection of the dome structure is located at the contact point between the dome and the base plate, which meets the requirements of the specification.

[0118] Figure 14 The flow field of the underwater space station (Type A) obtained by three-dimensional hydrodynamic numerical simulation shows that the flow pattern is smooth, the water surface gradient is gentle, and the maximum flow velocity increases by only 9%; Figure 15 The surface flow pattern and water depth distribution of the flow field where the Type A space station is located indicate that the space station only causes local weak waterlogging, with the maximum waterlogging depth being only 0.02m. The downstream recirculation area is weak, and the resistance loss is very small. The space station does not affect the normal flow of the channel.

[0119] The above description is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention. These should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An adsorption-type underwater space station for non-stop water repair of large open channels, characterized by: The invention comprises a dome (1), wherein the bottom of the two sides of the dome (1) are respectively provided with side wings (2), the side wings (2) are provided with vacuum suction cup arrays (4), the vacuum suction cup arrays (4) are connected to a vacuum pump, an air bag (6) is provided on the upper surface of the dome (1), and a water pump assembly (11) is provided inside the dome (1); both end surfaces of the dome are open, and a secondary anti-seepage assembly (9) is provided at the bottom of the inner side of the dome (1); the secondary anti-seepage assembly (9) comprises an anti-seepage wall (901) close to the inner wall of the dome (1), an anti-seepage ditch is formed between the anti-seepage wall (901) and the inner side of the dome (1), and a drainage pipe is provided in the anti-seepage ditch. (902); a vertical flexible connector (905) is installed on the top of the anti-seepage wall (901), the top of the vertical flexible connector (905) is connected to the dome (1), a supporting connecting rod (108) is connected between the top of the side of the anti-seepage wall (901) and the dome (1), a horizontal flexible connector (903) is connected to the side of the anti-seepage wall (901), the other end of the horizontal flexible connector (903) is connected to the dome (1); a sealing water-stop assembly is fixed on the edge of the bottom surface of the dome (1); the sealing water-stop assembly includes a dome base (109) connected to the bottom of the dome (1), and the bottom of the dome base (109) is connected to the bottom of the dome (1). A waterproof rubber pad (110) is connected; an upper groove is opened in the middle of the lower surface of the dome base (109); a lower groove with upper and lower openings is opened in the middle of the upper surface of the waterproof rubber pad (110); the upper groove and the lower groove are positioned correspondingly and are connected to form a sealed cavity; an inflatable rubber (111) is provided in the sealed cavity; a cavity is provided in the inflatable rubber (111); an inflatable pipe (112) for inflating is provided in the cavity; the inflatable pipe (112) passes through the inflatable rubber (111) and the dome base (109) in sequence and extends outward from the cavity; the extended end of the inflatable pipe (112) is connected to an air source and an inflatable pump; the side wings A telescopic guide wheel (7) is installed on the outer wall of (2) to facilitate the movement of the adsorption-type underwater space station. The telescopic guide wheel (7) includes a guide wheel, and the top of the guide wheel is connected to a cylinder (701) with a piston rod facing downward, and the top of the cylinder (701) is fixed to the side wing (2); waterproof bearings are installed on both sides of the arched lower end side surface of the dome (1) near its lower end surface, and a drive shaft is installed in the waterproof bearing. One end of the drive shaft is located outside the dome (1) and is connected to an impeller extending into the open channel water, and the other end of the drive shaft is connected to an internal exhaust fan; external exhaust fans are installed on both sides of the inner side surface of the arched upper end of the dome (1) near its outer end.

2. The adsorption-type underwater space station for non-stop water repair of large open channels according to claim 1, characterized in that: A lighting lamp assembly (10) and a construction water tap assembly (8) are installed in the dome (1).

3. The adsorption-type underwater space station for non-stop water repair of large open channels according to claim 1, characterized in that: The dome (1) is assembled from a dome segment I (101), a dome segment II (102) and a dome segment III (103).

4. The method for using the adsorption-type underwater space station for non-stop water repair of large open channels according to any one of claims 1 to 3, characterized in that: The steps include: a) Clean the edges of the area to be repaired on the slope of the open channel to facilitate the operation of the suction cup; b) The dome (1) is loaded onto a vehicle and transported to the nearest road to the designated repair area, and then transported to the bank of the channel by a crane, assembled downstream, and the airbag (6) is inflated; then the cable of the onshore winch is connected to the four sides of the dome (1), and the winch cable pulls the space station to transfer it to the designated repair area, and the airbag (6) is deflated, so that the space station is positioned and sunk in the repair area; c) Using a vacuum pump to pump air from each suction cup of the vacuum cup array (4) to a predetermined vacuum degree, and checking the suction force to ensure that it meets the design requirements for the anti-floating stability of the space station; d) using the water pump assembly (11) to drain all the accumulated water inside the space station into the channel; e) Construction workers and construction machinery then enter the site and begin slope repair work; f) After the repair is completed, the construction personnel and the construction machinery withdraw, and by inflating the suction cups of the vacuum suction cup array (4), a gas cushion is formed by utilizing the gas recoil force to restore the space station to a mobile state, and the air bag (6) is inflated, and the space station moves downstream to the next maintenance work area in conjunction with the telescopic guide wheel (7) and the connected cable on the space station, and then the air bag (6) is deflated and the telescopic guide wheel (7) is retracted; and then the work of steps a), c) to e) is repeated; g) After the repair work is completed, the vacuum degree of the vacuum cup array (4) is adjusted to remove the suction force, and the airbag (6) is inflated and connected to the cable to adjust the space station's attitude to a downstream docking state. The airbag (6) is then deflated, and the various parts of the dome (1) are disassembled and loaded into trucks by cranes and pulled back to the storage warehouse.

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