Automatically sinking and floating floating fountain device and operation method

Abstract

The present invention discloses an automatic sinking and floating floating fountain device and an operation method, including a float and a fountain system, wherein the float includes an upper buoyancy box, a rack and a lower buoyancy box, and a positioning system, etc. The upper and lower buoyancy boxes are respectively divided and sealed into multiple sections by multiple upper and lower partitions, and multiple valves are arranged on the lower buoyancy box. When the fountain device needs to sink, the corresponding valves of each section of the lower buoyancy box are opened to inject water to make the fountain device sink; when the fountain device is submerged in water, the air compressor is opened to press compressed air, and the corresponding valves discharge the water in each section of the lower buoyancy box to make the fountain device float; the sinking or floating of the fountain device is automatically realized by computer control; at the same time, the fountain device can also limit the maximum floating height and sinking depth through a limit structure. Therefore, the improved floating fountain device has the advantages of beautiful landscape, safety and reliability, energy saving and emission reduction, ecological protection, and high degree of automatic sinking and floating, and its economic and social benefits are remarkable when combined with the corresponding construction method.

Description

Technical Field

[0001] The invention relates to the field of fountain landscape, and in particular to an automatic sinking and floating floating fountain device and an operating method. Background Art

[0002] The floating fountain device is a fountain system placed on a floating body such as a steel structure that provides buoyancy on the water. It can float or dive, is flexible, and combines virtuality and reality. In the event of a strong typhoon, it can also dive into the water, and has a strong ability to resist natural disasters. At present, there are two main measures for the control of the sinking and floating of the floating fountain device: one is that one side of the floating body is connected to the fixed column by a movable part to move up and down within a certain range, and the sinking and floating of the floating body is achieved by increasing or decreasing the amount of water in the floating body storage tank, such as the Chinese patent "Lifting Water Floating Platform", patent number: CN200420114723.6; the second is to control the sinking and floating of the floating body through a mechanical device, such as the Chinese patent "A Fountain Fixing Device", patent number: CN201921010415.1. In the patent of the above measure one, when the water level rises and submerges the entire floating fountain device, the water in the floating body storage tank cannot be discharged, and the floating fountain device cannot float to the surface. The mechanical device of the second patent is immersed in water for a long time. Due to the corrosion of the mechanical device, it has a certain impact on the reliability of the floating fountain device to achieve sinking and floating. Its lubricating oil also has a certain pollution to the water body, which is not conducive to protecting the natural ecological environment. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a floating fountain device and an operation method which has beautiful landscape, is safe and reliable, saves energy and reduces emissions, is environmentally friendly, and has a high degree of automatic sinking and floating.

[0004] The technical problem of the present invention is achieved through the following technical solutions:

[0005] An automatic floating fountain device that sinks and floats, comprising a float floating on the water surface of a river and a fountain system installed on the float, wherein the float comprises an upper float, a rack and a lower float; the lower float is respectively arranged on both sides of the rack, and the lower float and the top surface of the rack form a floating structure, the lower float is evenly divided into sections and closed by a plurality of lower partitions to form multiple independent sections, each section of the lower float is equipped with an inlet and outlet valve, an air intake valve and an exhaust valve, the air intake valve is connected to an air compressor, and each section of the lower float has a circular cross-section; the upper float is enclosed around the rack to form a concave shape, the fountain system is arranged in the concave shape, the upper float is evenly divided into sections and independently closed by a plurality of upper partitions to form multiple sections When the floating fountain device floats on the water surface at the designed water level, that is, when part of the upper buoyancy box is exposed to the water surface and needs to sink, the exhaust valve and the inlet and outlet valves of each section of the lower buoyancy box are opened, and water is injected into each section of the lower buoyancy box to make the floating fountain device sink completely; when the floating fountain device is completely submerged in water, the air compressor is turned on to press in compressed air, and the inlet and outlet valves discharge the water in each section of the lower buoyancy box to make the floating fountain device float; the floating fountain device is connected and locked with multiple anchor blocks sunk to the river bottom through multiple anchor chains, and the maximum floating height of the floating fountain device is limited; the river bottom is provided with a bracket, and the bracket and the multiple anchor chains connected with the anchor blocks jointly limit the maximum sinking depth of the floating fountain device.

[0006] When the floating fountain device floats on the water surface at the designed water level, the total amount is The length of each lower pontoon of the section is At this time, a small amount of water is injected into each section to simplify the conversion to the length of the lower buoyancy tank with the same cross section. , the buoyancy box is divided into two situations: sinking and floating. When the floating fountain device sinks, the exhaust valve and the water inlet and outlet valve of each section of the buoyancy box are opened. One end of the exhaust valve is connected to the buoyancy box, and the other end is connected to the exhaust floating head floating on the water surface. Water is then injected into each section of the buoyancy box to make the floating fountain device sink completely and be placed on the bracket in the water. The depth from the center of the cross section of the buoyancy box to the water surface is , The length of water injected at any time is The circular cross-section of each lower buoy and the combined water resistance of the inlet and outlet valves are ; When the floating fountain device sinks and rests on the underwater bracket, the depth from the cross-section center of the lower buoyancy box to the water surface is also , turn on the air compressor and press in the compressed air at a pressure of , The length of water discharged at a time is The circular cross-section of each lower buoy and the combined drainage resistance of the inlet and outlet valves are Assuming that the volume of water injected into the buoyancy box when it sinks is equal to the volume of air discharged, and the volume of compressed air pressed into each section of the buoyancy box and the water in each section of the buoyancy box when it floats up are equal, that is, they are incompressible, and the water inflow and sinking process of each section of the buoyancy box occur simultaneously, and the drainage and floating process of each section of the buoyancy box occur simultaneously. According to fluid mechanics and Newton's laws, the calculation formulas for the relevant parameters of the sinking and floating of the floating fountain device are as follows:

[0007] Formula 1:

[0008] When the floating fountain device sinks, the lower buoyancy box sinks The length of water inflow in each section of the lower buoyancy tank at a certain moment is The unit area resistance of water to the sinking of the floating fountain device is The water area around the floating fountain device is simplified to remain unchanged during the sinking process, which is equal to the product of the vertical area around the floating fountain device and the unit area resistance. ,when When the total water intake of the floating fountain device is , sinking force , sinking depth and the average water inflow per unit time They are

[0009]

[0010]

[0011]

[0012] 1. When The gas in the upper and lower buoyancy boxes is just discharged to the length of water inlet within the time And the floating fountain device sinks synchronously to the design water level, that is, the center of the cross section of the buoyancy box sinks to the lowest design water level, and the sinking time is calculated using Formula 1;

[0013] (ii) When If the floating fountain device has sunk to the lowest design water level within the time limit, but the gas in the lower buoyancy box has not been completely discharged, close the inlet and outlet valves to stop the water from entering or reduce the water flow of the inlet and outlet valves in advance to meet the requirements;

[0014] (III) When Length of water in the upper and lower buoys during the time However, the floating fountain device did not sink to the minimum design depth, and the difference from the minimum design sinking depth was , the floating fountain device continues to sink Time for

[0015]

[0016] Formula 2:

[0017] When the floating fountain device floats up, the lower buoyancy box floats up At each moment, the compressed air intensity of each lower buoy The drainage length under the action is , the floating height is The resistance force per unit area of ​​water on the floating fountain device is The water area around the floating fountain device is simplified to remain unchanged during the floating process, that is, it is equal to the product of the vertical area around the floating fountain device and the unit area resistance. ,when The total water discharge of the floating fountain device , buoyancy , floating height and the average discharge per unit time They are

[0018]

[0019]

[0020] 1. When The length of water discharged in the upper and lower buoys is just The floating fountain device simultaneously floats up to the design water level, that is, the center of the cross section of the lower buoyancy box floats up to the highest design water level, and the sinking time is calculated using Formula 1;

[0021] (ii) When If the floating fountain device has risen to the highest design water level within the time limit, but the remaining water in the lower buoyancy box is more than the pre-injected water volume in each section, close the inlet and outlet valves to stop draining water or increase the drainage flow of the inlet and outlet valves in advance to meet (I)

[0022] (III) When Discharge length in the upper and lower buoyancy tanks within a certain period of time However, the floating fountain device did not float to the highest design water level, and the difference from the highest design water level was , the floating fountain device continues to float up Time for

[0023] Pick The larger one is used as the flow rate per unit time of the inlet and outlet valves. Similarly, the sinking or floating time of the floating fountain device is calculated according to the principles of Formula 1 and Formula 2.

[0024] The symbols in Formula 1 and Formula 2 are defined as:

[0025] ——respectively the length and inner diameter of each section of the lower buoyancy tank and the total number of closed sections of the upper buoyancy tank, ;

[0026] ——respectively, the depth from the lowest design water level in the center of the lower pontoon section to the water surface when the floating fountain device is sinking, or the height from the lowest design water level in the center of the lower pontoon section to the water surface when the floating fountain device is floating, ;

[0027] ——respectively the difference between the lowest design water level and the highest design water level at the center of the lower buoyancy box cross section when the floating fountain device sinks or floats, and the height of the water column converted from the standard atmospheric pressure of the river water acting on the floating fountain device, ;

[0028] ——When the floating fountain device sinks, Length of water in the upper and lower buoys during the time However, the floating fountain device did not sink to the lowest design water level. The sinking water level at this time is the difference from the lowest design water level; or when Discharge length in the upper and lower pontoon tanks within a certain period of time However, the floating fountain device did not float to the highest design water level. This is the difference between the floating water level at this time and the highest design water level. ;

[0029] ——When the floating fountain device sinks, a small amount of water is pre-injected into each lower buoyancy box at the design height to simplify the length of the circular pipe of the lower buoyancy box; or when the floating fountain device floats up, a small amount of water remaining in each lower buoyancy box is simplified to the length of the circular pipe of the lower buoyancy box; take , ;

[0030] ——The gas pressure of the air compressor into each lower buoyancy box, ;

[0031] ——respectively, the length and time of water filling or the length and time of water discharge of each section of the buoyancy tank, and It is also the time when the floating fountain device sinks or floats synchronously. ;

[0032] ——When the floating fountain device sinks, Length of water in the upper and lower buoys during the time However, the floating fountain device has not sunk to the lowest design water level. The difference between the sinking water level and the lowest design water level is , continue to sink the time taken; or Discharge length in the upper and lower pontoon tanks within a certain period of time However, the floating fountain device has not floated to the highest design water level. The difference between the floating water level and the highest design water level is , continue to float The time spent, ;

[0033] ——When the floating fountain device sinks The depth from the center of the floating box section to the highest design water level at the moment, or when the floating fountain device floats up The height from the center of the pontoon section to the lowest design water level at the moment, ;

[0034] ——The designed water inflow length of each section of the lower pontoon or the designed drainage length of each section of the lower pontoon, , ;

[0035] ——are respectively the pressure of compressed air in the buoyancy box, the water pressure of the river water at the connection point between the center of the cross section and the river water when the buoyancy box sinks, and the water pressure of the river water at the connection point between the center of the cross section and the river water when the buoyancy box floats. ;

[0036] ——Respectively The total water intake when the lower pontoon sinks, The total displacement of the lower pontoon when it floats up, ;

[0037] ——respectively the average water intake and the average water discharge of the buoyancy tank per unit time, ;

[0038] ——respectively the volume of water entering the pontoon when it sinks The sinking force and the displacement volume of the buoyancy box when it floats up The buoyancy of ;

[0039] ——The water resistance force of the floating fountain device when it sinks or floats. To simplify the calculation, it is assumed that the water resistance force of the surrounding water area of ​​the floating fountain device remains unchanged during the sinking or floating process, that is, it is equal to the vertical area of ​​the surrounding area of ​​the floating fountain device. The product of the resistance per unit area is , ;

[0040] ——The circular cross-section of each section of the lower buoyancy box and the comprehensive inlet and outlet resistance of the inlet and outlet valves are simplified to the inlet and outlet resistance of the peripheral area per unit length of the lower buoyancy box, which is determined by experiments. If there is no test data, relevant information can be consulted. ;

[0041] ——respectively the weight and density of water, ;

[0042] ——respectively, the water flow acceleration of each section of the inner wall when the lower buoyancy box sinks and the water flow acceleration of each section of the inner wall when the lower buoyancy box floats, ;

[0043] ——respectively, the sinking acceleration of the floating fountain device when the lower buoyancy box sinks, and the floating acceleration of the floating fountain device when the lower buoyancy box floats, ;

[0044] ——respectively, the mass of water in each length of the buoyancy box when the floating fountain device sinks, the mass of the undischarged water when the floating fountain device floats, and the total mass of the floating fountain device excluding some water, ;

[0045] ——respectively the weight and density of water, .

[0046] The rack is composed of a circular pipe and a plate. The two ends of the circular pipe are welded to the lower buoyancy boxes on both sides to form a tic-tac-toe frame. The plate is installed on the frame to form a closed concave internal plane, and the fountain system is installed on the plane.

[0047] The lower buoyancy box is a circular pipe installed on both sides of the frame, and the circular pipe is welded to the two ends of the frame to form the skeleton of the floating fountain device.

[0048] The upper buoyancy box has a closed trapezoidal cross-section. The upper buoyancy box is arranged around the structure composed of the rack and the lower buoyancy box, and forms a concave whole of the floating fountain device with the rack. The upper buoyancy box and the circular pipes in the rack together constitute the basic buoyancy box of the floating fountain device, providing basic buoyancy to maintain the floating fountain floating at the designed elevation.

[0049] The water inlet and outlet valves are two-way valves. After the water inlet and outlet valves are opened, the compressor is started to press compressed air of the designed air pressure into the air inlet valve. When the air pressure in each section of the lower buoyancy box is higher than the water pressure in the box connected to the river, water is discharged from the lower buoyancy box; after the exhaust valve is opened, when the air pressure in each section of the lower buoyancy box is lower than the water pressure in the box connected to the river water, water enters the lower buoyancy box; the air inlet valve is a one-way check valve, which is connected to the air compressor. When the air pressure in each section of the lower buoyancy box is lower than the water pressure in the box connected to the river water, the check valve is closed to prevent water from entering the compressor; the exhaust floating head is connected to the exhaust valve through a hose and floats on the water surface to exhaust air, and prevents river water from entering the lower buoyancy box.

[0050] The multiple anchor chains, multiple anchor blocks and brackets together constitute a limiting structure. The anchor chain is a flexible chain, the anchor block is a concrete block sunk to the riverbed, one end of the anchor chain is connected to the rack and the other end is connected to the anchor block. The maximum floating height of the floating fountain device is controlled and locked by the anchor chain and the anchor block sunk to the riverbed. The anchor chain, the anchor block and the center of the floating fountain device are symmetrically arranged; the bracket is a reinforced concrete structure or a steel structure, composed of multiple pile foundations and multiple longitudinal and transverse beams. When the floating fountain device sinks, the bracket limits the sinking to the deepest water level.

[0051] The top and middle of the four corners of the plane of the buoyancy box are equipped with elevation marks, which include a circular tube and a GPS RTK mobile station on the top of the circular tube. The circular tube is sprayed with a water level line. The GPS RTK mobile station consists of three parts: a base station receiver, a data link, and a mobile station receiver. Alternatively, the Beidou RTK system is adopted. The mobile station has an IP68 waterproof performance, a 3G seismic performance, and an operating temperature of -40°C to 65°C. A receiver is installed on the base station as a reference station to continuously observe the satellite, and its observation data and station information are sent to the mobile station in real time through a radio transmission device. While receiving the GPS satellite signal, the mobile station GPS receiver receives the data transmitted by the base station through a wireless receiving device, and according to the principle of relative positioning, the three-dimensional coordinates and accuracy of the mobile station are calculated in real time, the coordinates of the floating fountain device are converted, and the sinking and floating of the floating fountain are grasped in real time and dynamically.

[0052] The opening and closing of the water inlet and outlet valves, air inlet valves, and exhaust valves, the water inlet and outlet flow rates, the sinking and floating time, as well as the compressor and the elevation mark, i.e., the GPS RTK mobile station, are remotely and centrally controlled by a computer to jointly control the water inlet and outlet of the buoyancy box and the sinking and floating state of the floating fountain device; the opening and closing of the fountain system, the water posture, and the sound and light colors are also remotely and centrally controlled by a computer.

[0053] An operating method of an automatic sinking and floating floating fountain device comprises the following steps:

[0054] Step 1: Determine the size of the automatic sinking and floating fountain device

[0055] According to the owner's requirements and the terrain and geological drilling data, the size and layout of the automatic sinking and floating fountain device are initially planned, and the engineering materials and mechanical equipment are selected;

[0056] The structural dimensions, layout and engineering materials of the automatic sinking and floating floating fountain device are calculated and verified by the relevant mechanical principles, and the sinking and floating time of the floating fountain device, as well as the mechanical equipment and computer control parameters are calculated and verified by Formula 1 and Formula 2;

[0057] ③ Prepare construction organization design documents and organize construction;

[0058] Step 2: construct and manufacture the racks, lower buoyancy box, upper buoyancy box, limit structure, purchase fountain system, valves, elevation mark and GPS RTK system, and compile computer control software;

[0059] Measure and lay out, and determine the precise position and elevation of the limit structure according to the design drawings;

[0060] ②Manufacture of bent frames, lower buoyancy boxes, upper buoyancy boxes, and limiting structural components;

[0061] ③ The construction and installation of the limit structure shall meet the design requirements;

[0062] ④ Assemble the rack, lower buoyancy box and upper buoyancy box on the nearest land to form the floating fountain skeleton float. The welding and assembly quality of each joint shall meet the design requirements, and the parts that need rust prevention shall be treated with rust prevention;

[0063] Install various valves on the lower buoy, the technical indicators of various valves meet the design requirements, and assemble GPS RTK system and elevation mark;

[0064] Carry out water injection test on the floating fountain skeleton to confirm that there is no water leakage. Reserve a small amount of water in each section of the pontoon according to the design requirements, and simplify the conversion to the length of the circular tube of the pontoon with equal cross section. ;

[0065] Compile computer control software for floating fountains that automatically sink and float;

[0066] Step 3: Install the floating fountain

[0067] Drag the floating fountain skeleton float to the water surface position required by the design;

[0068] ②Measure the position of the floating fountain skeleton float, and firmly connect the floating fountain skeleton float to the anchor chain after accurate positioning;

[0069] ③Install an exhaust floating head on the exhaust valve;

[0070] ④Install fountain system, elevation mark, GPS RTK mobile station and computer control system;

[0071] Step 4: Debug the floating fountain

[0072] The overall elevation of the floating fountain skeleton is detected by using elevation marks and GPS RTK mobile stations. The elevation of the top of the floating box is required to meet the design requirements, and the errors of the four corners and the middle top points meet the design requirements.

[0073] ② If it does not meet the design requirements, adjust the height of the top surface of the floating fountain device by injecting water, cement concrete or other heavy materials into a certain section of the upper buoyancy box so that the top surface of the floating fountain device exposed above the water surface is balanced and consistent and meets the design requirements;

[0074] ③ Sinking test of floating fountain device: After the exhaust valve and inlet and outlet valves of each section of the lower buoyancy box are opened synchronously through computer control, the air pressure in each section of the lower buoyancy box is lower than the water pressure in the box connected to the river water, and water enters the lower buoyancy box, causing the floating fountain device to sink. The computer understands and controls the sinking dynamics of the floating fountain device through the elevation mark and the GPS RTK mobile station, so that the floating fountain device sinks steadily to the designed minimum water level and is placed on the bracket. The computer controls the synchronous closing of the exhaust valve and inlet and outlet valves of the lower buoyancy box;

[0075] ④Floating fountain device buoyancy test: When the floating fountain device is completely submerged in water and placed on the bracket, the air compressor and the inlet and outlet valves of each section of the lower buoyancy box are opened synchronously through computer control, compressed air is pressed into each section of the lower buoyancy box, and the inlet and outlet valves discharge the water in each section of the lower buoyancy box to make the floating fountain device float. The computer understands and controls the floating dynamics of the floating fountain device through the elevation mark and the GPS RTK mobile station, so that the floating fountain device floats smoothly to the highest design height, and the computer controls the synchronous closing of the inlet and outlet valves of the lower buoyancy box;

[0076] ⑤Through the sinking and floating tests of the floating fountain device, debug the computer software so that it can automatically control the sinking and floating of the floating fountain device and achieve the expected purpose.

[0077] Compared with the prior art, the present invention mainly provides a floating fountain device with automatic sinking and floating, which has the following characteristics: First, the fountain system floats on the water surface when it is running, and sinks underwater when the fountain system is closed, which does not affect the natural landscape. In particular, when encountering bad weather, sinking underwater ensures the safety of the floating fountain device; second, the entire floating fountain device is automatically controlled by a computer to sink and float, saving manpower and mechanical resources, and can also control the sinking depth and floating height and time by adjusting the flow of various valves, so that the floating fountain device can run smoothly and have strong maneuverability; third, no large mechanical device is used in the water to control the sinking and floating of the floating fountain device, avoiding the pollution of river water by the lubricating oil of the mechanical equipment; fourth, the recommended calculation formula theory is combined with reality, which is scientific, reasonable, practical and easy to implement, and guides the manufacture, assembly, commissioning and operation of the floating fountain device. Therefore, the present invention is a floating fountain device with beautiful landscape, safety and reliability, energy saving and emission reduction, ecological and environmental protection, and high degree of automatic sinking and floating. It has high economic and social benefits when combined with the corresponding construction method. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] Figure 1 It is a schematic diagram of the structural elevation of the present invention.

[0079] Figure 2 for Figure 1 Half left view and half AA section view.

[0080] Figure 3 A calculation diagram for the sinking and water filling time of each buoyancy box of the floating fountain device.

[0081] Figure 4 A calculation diagram for the floating fountain device's floating and drainage time for each lower buoyancy box. DETAILED DESCRIPTION

[0082] The embodiments of the present invention will be described in detail below with reference to the above-mentioned drawings.

[0083] like Figure 1~Figure 4 As shown, 1. river bottom, 2. rack, 3. lower pontoon, 31. lower baffle, 32. lower pontoon section, 4. upper pontoon, 41. upper baffle, 5. fountain system, 61. inlet and outlet valves, 62. air inlet valve, 63. exhaust valve, 631. exhaust floating head, 7. limiting structure, 71. anchor chain, 72. anchor block, 73. bracket, 8. elevation mark.

[0084] An automatic sinking and floating fountain device and operation method, such as Figure 1 , Figure 2 As shown, it mainly involves a landscape device that places a fountain system on a floating body such as a steel structure that provides buoyancy on the water, and can float up or down. The floating fountain device is flexible and maneuverable, combining the real and the virtual. In the event of a strong typhoon, it can also dive into the water, and has a strong ability to resist natural disasters.

[0085] The floating fountain device is mainly composed of a buoy floating on the water surface of the river and a fountain system 5 installed on the buoy. The buoy includes an upper buoyancy box 4, a rack 2 and a lower buoyancy box 3.

[0086] The lower buoyancy box 3 is respectively arranged on both sides of the rack 2, and the lower buoyancy box 3 and the top surface of the rack 2 form a floating structure. The specific structure is: the lower buoyancy box 3 is a circular pipe made of ordinary metal, weather-resistant metal, or weather-resistant hard plastic. The circular pipe made of ordinary metal needs to be rust-proofed. The circular pipe is installed on both sides of the rack 2 and welded with the two ends of the rack to form the skeleton of the floating fountain device, and serves as an adjustment buoyancy box of the floating fountain device, providing a buoyancy adjustment function to adjust the sinking or floating of the floating fountain device; the lower buoyancy box 3 is equally divided and segmented by the lower partition 31, that is, the lower buoyancy box 3 is equally segmented and closed by multiple lower partitions 31 to form multiple independent sections, which can block the long-length flow of water in the lower buoyancy box 3 to affect the stability of the floating fountain device and prevent the individual sections of the lower buoyancy box 3 from leaking water and causing the floating fountain device to sink. Each section of the lower buoyancy box 3 has a circular cross-section; according to the overall mass of the floating fountain device, the lower buoyancy box 3 can also be arranged around the rack 2 when the volume of the lower buoyancy box 3 needs to be increased by calculation.

[0087] In addition, each section of the lower buoyancy box 3 is equipped with an inlet and outlet valve 61, an air intake valve 62 and an exhaust valve 63, which together constitute a valve group. The above-mentioned valve group is mainly driven by electromagnetic or air pressure, with a waterproof performance of IP68. The opening or closing of the valve group and the flow rate are remotely and centrally controlled by a computer.

[0088] The water inlet and outlet valves 61 are two-way valves. After opening the water inlet and outlet valves, start the compressor to pressurize compressed air of the designed air pressure into the air inlet valve 62. When the air pressure in each section of the lower buoyancy box 3 is higher than the water pressure in the box connected to the river, water is discharged from the lower buoyancy box 3; after opening the exhaust valve 63, when the air pressure in each section of the lower buoyancy box 3 is lower than the water pressure in the box connected to the river water, water enters the lower buoyancy box 3; the air inlet valve 62 is a one-way check valve, which is connected to the air compressor. When the air pressure in each section of the lower buoyancy box 3 is lower than the water pressure in the box connected to the river water, the check valve is closed to prevent water from entering the compressor; the exhaust floating head 321 is connected to the exhaust valve 63 through a hose and floats on the water surface to exhaust air. The length of the hose must meet the needs.

[0089] The rack 2 is composed of circular pipes and aluminum alloy plates made of ordinary metal, weather-resistant metal, and weather-resistant hard plastic. The circular pipes made of ordinary metal need to be rust-proofed. The two ends of the circular pipes are welded to the lower buoyancy boxes 3 on both sides to form a tic-tac-toe frame, and the aluminum alloy plates are installed on the frame to form a closed concave internal plane, and the fountain system 5 is installed in the concave shape of the plane.

[0090] The concave shape is actually formed by the buoyancy box 4 enclosed and arranged around the rack 2. The specific structure is: the buoyancy box 4 is a closed trapezoidal cross-section made of ordinary metal, weather-resistant metal, or weather-resistant hard plastic. The buoyancy box 4 is divided into sections and closed by an upper partition 41, that is, the buoyancy box 4 is evenly divided into sections and independently closed by multiple upper partitions 41 to form multiple sections. The multiple sections of the buoyancy box 4 are arranged around the structure composed of the rack 2 and the lower buoyancy box 3, so as to form a concave whole of the floating fountain device with the rack 2. The buoyancy box 4 made of ordinary metal needs to be rust-proofed. The buoyancy box 4 and the circular pipe in the rack 2 together constitute the basic buoyancy box of the floating fountain device, which can provide basic buoyancy to maintain the floating fountain device floating at the designed elevation.

[0091] At the same time, due to the uneven weight distribution of the fountain system 5, water, cement concrete or other heavy materials are injected into individual sections of the buoyancy box 4 to adjust the height of the top surface of the floating fountain so that the top surface of the floating fountain is exposed above the water surface in a balanced and consistent manner; each section of the buoyancy box 4 reserves some space as a design elevation for adjusting the floating fountain.

[0092] The fountain system 5 is a combination of specific shapes that sprays water through a nozzle at a certain pressure, spraying water in various shapes and forms, or accompanied by pleasant music, beautiful spectrum, and colorful colors. It is a kind of waterscape art that embodies the combination of movement and stillness, forms a bright and lively atmosphere, and gives people a beautiful enjoyment; at the same time, the fountain can also increase the content of negative ions in the air, play a role in purifying the air, increasing air humidity, and lowering the ambient temperature.

[0093] In this way, when the floating fountain device floats on the water surface at the designed water level, that is, when part of the upper buoyancy box 4 is exposed to the water surface and needs to sink, the exhaust valve 63 and the inlet and outlet valves 61 of each section of the lower buoyancy box 3 are opened, and water is injected into each section of the lower buoyancy box 3 to make the floating fountain device sink completely; when the floating fountain device is completely submerged in water, the air compressor is turned on to press in compressed air, and the inlet and outlet valves 61 discharge the water in each section of the lower buoyancy box 3 to make the floating fountain device float.

[0094] At the same time, the floating fountain device is connected and locked with multiple anchor blocks 72 sunk to the river bottom through multiple anchor chains 71, and the maximum floating height of the floating fountain device is limited. A bracket 73 needs to be set on the river bottom 1. The bracket and multiple anchor chains 71 connected to the anchor blocks 72 jointly limit the maximum sinking depth of the floating fountain device. The river bottom 1 refers to the bottom of the river, reservoir, lake or other water body where the floating fountain device is installed.

[0095] The plurality of anchor chains 71, the plurality of anchor blocks 72 and the bracket 73 together constitute the limiting structure 7. The anchor chain 71 is a flexible chain made of ordinary metal, weather-resistant metal, or weather-resistant hard plastic. The anchor chain made of ordinary metal needs to be rust-proofed. The anchor block 72 is a concrete block sunk to the river bottom. One end of the anchor chain 71 is connected to the rack and the other end is connected to the anchor block 72. The maximum floating height of the floating fountain device is controlled and locked by the anchor chain 71 and the anchor block 72 sunk to the river bottom 1. The anchor chain 71 and the anchor block 72 are symmetrically arranged with respect to the center of the floating fountain device, and the number is determined by the scale of the floating fountain device to ensure safe and appropriate anchoring. The bracket 73 is a reinforced concrete structure or a steel structure, composed of a plurality of pile foundations and a plurality of longitudinal and transverse beams. When the floating fountain device sinks, the bracket 73 limits the sinking to the deepest water level. At the same time, due to the control of the anchor chain 71, the center of the floating fountain device can sink steadily and land on the bracket 73.

[0096] In addition, elevation markers 8 are installed at the top and middle of the four corners of the upper buoy 4. The elevation markers are composed of a circular tube at a certain height and a GPS RTK (real time kinematic) mobile station on the top of the circular tube. The number of installations is determined according to actual conditions. The circular tube spray water level line can visually observe the water level of the floating fountain and dynamically grasp the sinking and floating situation of the floating fountain; the GPS RTK mobile station is composed of three parts: the base station receiver, the data link, and the mobile station receiver. It can also use the Beidou RTK system. The mobile station has an IP68 waterproof performance and a 3G seismic performance. It can withstand short-term underwater water pressure at a certain depth and has an operating temperature of -40℃~65℃; a receiver is placed on the base station as a reference station to continuously observe the satellite, and its observation data and station information are sent to the mobile station in real time through radio transmission equipment. While receiving the GPS satellite signal, the mobile station GPS receiver receives the data transmitted by the base station through the wireless receiving equipment, and according to the principle of relative positioning, it solves the three-dimensional coordinates and accuracy of the mobile station in real time, converts the coordinates of the floating fountain device, and grasps the sinking and floating situation of the floating fountain in real time.

[0097] The opening and closing of the water inlet and outlet valves 61, the air inlet valve 62, and the exhaust valve 63, the water inlet and outlet flow, the sinking and floating time, and the compressor and the elevation mark 8, i.e., the GPS RTK mobile station, are remotely and centrally controlled by a computer to jointly control the water inlet and outlet of the buoyancy box 3 and the sinking and floating state of the floating fountain device, and achieve the optimal sinking and floating effect of the floating fountain.

[0098] The opening and closing, water posture, sound and light color of the fountain system 5 are also remotely and centrally controlled by a computer; the floating fountain device is centrally controlled by a computer to realize automatic control of sinking and floating and fountain operation.

[0099] When the floating fountain device floats on the water surface at the designed water level, the total amount is The length of each lower pontoon 3 of the segment is At this time, a small amount of water is injected into each section to simplify the conversion to the length of the lower buoyancy tank 3 with the same cross section. , the buoyancy box 3 is analyzed in two situations: sinking and floating; when the floating fountain device sinks, the exhaust valve 63 and the water inlet and outlet valve 61 of each section of the buoyancy box 3 are opened. One end of the exhaust valve 63 is connected to the buoyancy box 3, and the other end is connected to the exhaust floating head 631 floating on the water surface. Water is then injected into each section of the buoyancy box 3 so that the floating fountain device is completely sunk and placed on the bracket 73 in the water. The depth from the cross-section center of the buoyancy box 3 to the water surface is , The length of water injected at any time is The circular cross-section of each lower buoyancy box 3 and the combined water inlet resistance of the water inlet and outlet valve 61 are When the floating fountain device sinks and rests on the underwater bracket 73, the depth from the cross-sectional center of the lower buoyancy box 3 to the water surface is also , turn on the air compressor and press in the compressed air at a pressure of , The length of water discharged at a time is The circular cross-section of each lower buoyancy box 3 and the combined drainage resistance of the inlet and outlet valves 61 are Assuming that the volume of water injected into the buoyancy box 3 when it sinks is equal to the volume of air discharged, and the volume of compressed air pressed into each section of the buoyancy box and the volume of water in each section of the buoyancy box 3 when the buoyancy box 3 floats up are equal, that is, they are incompressible, and the water inflow and sinking process of each section of the buoyancy box 3 occur simultaneously, and the drainage and floating process of each section of the buoyancy box 3 occur simultaneously, according to fluid mechanics and Newton's law, the calculation formulas for the relevant parameters of the sinking and floating of the floating fountain device are as follows:

[0100] Formula 1:

[0101] When the floating fountain device sinks, the lower buoyancy box 3 sinks The length of water inflow of each section of the lower buoyancy box 3 at a certain moment is The unit area resistance of water to the sinking of the floating fountain device is The water area around the floating fountain device is simplified to remain unchanged during the sinking process, which is equal to the product of the vertical area around the floating fountain device and the unit area resistance. ,when When the total water intake of the floating fountain device is , sinking force , sinking depth and the average water inflow per unit time They are

[0102]

[0103]

[0104]

[0105] 1. When The gas in the lower buoyancy box 3 is just discharged to the water inlet length within the time And the floating fountain device sinks synchronously to the design water level, that is, the center of the cross section of the buoyancy box 3 sinks to the lowest design water level, and the sinking time is calculated using formula 1;

[0106] (ii) When If the floating fountain device has sunk to the lowest design water level within the time, but the gas in the lower buoyancy box 3 has not been completely discharged, the inlet and outlet valves 61 are closed to stop the water from entering or the water inlet flow of the inlet and outlet valves 61 is reduced in advance to meet the requirement of (I);

[0107] (III) When The length of water in the upper and lower buoyancy boxes 3 during the time However, the floating fountain device did not sink to the minimum design depth, and the difference from the minimum design sinking depth was , the floating fountain device continues to sink Time for

[0108]

[0109] Formula 2:

[0110] When the floating fountain device floats up, the lower buoyancy box 3 floats up At each moment, the compressed air intensity of each lower buoy 3 The drainage length under the action is , the floating height is The resistance force per unit area of ​​water on the floating fountain device is The water area around the floating fountain device is simplified to remain unchanged during the floating process, that is, it is equal to the product of the vertical area around the floating fountain device and the unit area resistance. ,when The total water discharge of the floating fountain device , buoyancy , floating height and the average discharge per unit time They are

[0111]

[0112]

[0113] 1. When The length of drainage in the upper and lower buoys 3 is just The floating fountain device simultaneously floats up to the design water level, that is, the center of the cross section of the lower buoyancy box floats up to the highest design water level, and the sinking time is calculated using Formula 1;

[0114] (ii) When If the floating fountain device has floated to the highest design water level within the time, but the remaining water in the lower buoyancy box 3 is more than the pre-injected water volume in each section, the inlet and outlet valves 61 are closed to stop draining water or the drainage flow of the inlet and outlet valves is increased in advance to meet the requirements of (I)

[0115] (III) When Discharge length in the upper and lower buoyancy tanks 3 during the time However, the floating fountain device did not float to the highest design water level, and the difference from the highest design water level was , the floating fountain device continues to float up Time for

[0116]

[0117] Pick The larger one is used as the unit time flow value of the water inlet and outlet valve 61. Similarly, the sinking or floating time of the floating fountain device is calculated according to the principles of Formula 1 and Formula 2.

[0118] The symbols in Formula 1 and Formula 2 are defined as:

[0119] ——respectively the equally divided length and inner diameter of each section of the lower buoyancy box 3 and the total number of the segmented closed sections of the upper buoyancy box 4, ;

[0120] ——respectively, the depth from the lowest design water level in the center of the 3-section of the lower pontoon to the water surface when the floating fountain device is sinking, or the height from the lowest design water level in the center of the 3-section of the lower pontoon to the water surface when the floating fountain device is floating, ;

[0121] ——respectively the difference between the lowest design water level and the highest design water level at the center of the 3-section of the lower pontoon when the floating fountain device sinks or floats, and the height of the water column converted from the standard atmospheric pressure of the river water acting on the floating fountain device, ;

[0122] ——When the floating fountain device sinks, The length of water in the upper and lower buoyancy boxes 3 during the time However, the floating fountain device did not sink to the lowest design water level. The sinking water level at this time is the difference from the lowest design water level; or when Discharge length in the upper and lower buoyancy tanks 3 during the time However, the floating fountain device did not float to the highest design water level. This is the difference between the floating water level at this time and the highest design water level. ;

[0123] ——When the floating fountain device sinks, a small amount of water is pre-injected into each section of the lower buoyancy box 3 at the design height to simplify the length of the circular pipe of the lower buoyancy box; or when the floating fountain device floats, a small amount of water remaining in each section of the lower buoyancy box 3 is simplified to the length of the circular pipe of the lower buoyancy box; take , ;

[0124] ——The gas pressure of the air compressor into each lower buoyancy box 3, ;

[0125] ——respectively, the length and time of water inflow or drainage of each section of the lower buoyancy tank 3, and It is also the time when the floating fountain device sinks or floats synchronously. ;

[0126] ——When the floating fountain device sinks, The length of water in the upper and lower buoyancy boxes 3 during the time However, the floating fountain device has not sunk to the lowest design water level. The difference between the sinking water level and the lowest design water level is , continue to sink the time taken; or Discharge length in the upper and lower buoyancy tanks 3 during the time However, the floating fountain device has not floated to the highest design water level. The difference between the floating water level and the highest design water level is , continue to float The time spent, ;

[0127] ——When the floating fountain device sinks The depth from the center of the 3rd section of the floating box to the highest design water level at the moment, or when the floating fountain device floats up The height from the center of the 3rd section of the lower pontoon to the lowest design water level at the moment, ;

[0128] ——The designed water inflow length of each section of the lower pontoon 3 or the designed drainage length of each section of the lower pontoon 3, , ;

[0129] ——are respectively the pressure of compressed air in the buoyancy box 3, the water pressure of the river water at the connection point between the center of the cross section and the river water when the buoyancy box 3 sinks, and the water pressure of the river water at the connection point between the center of the cross section and the river water when the buoyancy box 3 floats, ;

[0130] ——Respectively The total water intake when the lower pontoon 3 sinks, The total displacement of the lower pontoon 3 when it floats up, ;

[0131] ——respectively, the average water intake of the lower pontoon 3 per unit time and the average water discharge of the lower pontoon 3 per unit time, ;

[0132] ——respectively the volume of water entering the lower buoyancy box 3 when it sinks The sinking force and the displacement volume of the buoyancy box 3 when floating The buoyancy of ;

[0133] ——The water resistance force of the floating fountain device when it sinks or floats. To simplify the calculation, it is assumed that the water resistance force of the surrounding water area of ​​the floating fountain device remains unchanged during the sinking or floating process, that is, it is equal to the vertical area of ​​the surrounding area of ​​the floating fountain device. The product of the resistance per unit area is , ;

[0134] ——The circular cross section of each section of the lower buoyancy box 3 and the comprehensive resistance of the inlet and outlet water of the inlet and outlet valves are simplified to the inlet and outlet water resistance of the peripheral area per unit length of the lower buoyancy box 3, which is determined by experiments. If there is no test data, relevant information can be consulted. ;

[0135] ——respectively the weight and density of water, ;

[0136] ——respectively are the water flow acceleration of each section of the inner wall when the lower buoyancy box 3 sinks, and the water flow acceleration of each section of the inner wall when the lower buoyancy box 3 floats, ;

[0137] ——respectively, the sinking acceleration of the floating fountain device when the lower buoyancy box 3 sinks, and the floating acceleration of the floating fountain device when the lower buoyancy box 3 floats, ;

[0138] ——respectively, the mass of water in each length of the upper buoyancy box 4 when the floating fountain device sinks, the mass of the undischarged water when the floating fountain device floats, and the total mass of the floating fountain device excluding some water, ;

[0139] ——respectively the weight and density of water, .

[0140] The operating method of the floating fountain device of the present invention mainly comprises the following steps:

[0141] Step 1: Determine the size of the automatic sinking and floating fountain device

[0142] According to the owner's requirements and the terrain and geological drilling data, the size and layout of the automatic sinking and floating fountain device are initially planned, and the engineering materials and mechanical equipment are selected;

[0143] The structural dimensions, layout and engineering materials of the automatic sinking and floating floating fountain device are calculated and verified by the relevant mechanical principles, and the sinking and floating time of the floating fountain device, as well as the mechanical equipment and computer control parameters are calculated and verified by Formula 1 and Formula 2;

[0144] ③ Prepare construction organization design documents and organize construction;

[0145] Step 2: construct and manufacture the rack 2, the lower buoyancy box 3, the upper buoyancy box 4, the limit structure 7, purchase the fountain system 5, the valve, the elevation mark 8 and the GPS RTK system, and compile the computer control software;

[0146] Measure and lay out, and determine the precise position and elevation of the limit structure 7 according to the design drawings;

[0147] ② Manufacturing the bent frame 2, the lower buoyancy box 3, the upper buoyancy box 4, and the limiting structure 7 components;

[0148] ③ The construction and installation of the limit structure 7 shall meet the design requirements;

[0149] ④ Assemble the rack 2, lower buoyancy box 3 and upper buoyancy box 4 on the nearest land to form the floating fountain skeleton float. The welding and assembly quality of each joint shall meet the design requirements, and the parts that need rust prevention shall be treated with rust prevention;

[0150] Install various valves of the lower buoyancy box 3 and the upper buoyancy box 4. The technical indicators of various valves meet the design requirements. Install GPSRTK system and elevation mark 8;

[0151] Carry out water injection test on the floating fountain skeleton to confirm that there is no water leakage. Reserve a small amount of water in each section of the pontoon according to the design requirements, and simplify the conversion to the length of the circular tube of the pontoon with equal cross section. ;

[0152] Compile computer control software for floating fountains that automatically sink and float;

[0153] Step 3: Install the floating fountain

[0154] Drag the floating fountain skeleton float to the water surface position required by the design;

[0155] ② Measure the position of the floating fountain skeleton float, and after accurate positioning, firmly connect the floating fountain skeleton float to the anchor chain 71;

[0156] ③ An exhaust floating head 631 is installed on the exhaust valve 63;

[0157] ④Install fountain system 5, elevation mark 8, GPS RTK mobile station and computer control system;

[0158] Step 4: Debug the floating fountain

[0159] The overall elevation of the floating fountain skeleton is detected by using elevation mark 8 and GPS RTK mobile station. The elevation of the top of the upper buoyancy box is required to meet the design requirements, and the errors of the four corners and the middle top points meet the design requirements;

[0160] ② If it does not meet the design requirements, adjust the height of the top surface of the floating fountain device by injecting water, cement concrete or other heavy materials into a certain section of the upper buoyancy box 4, so that the top surface of the floating fountain device exposed above the water surface is balanced and consistent and meets the design requirements;

[0161] ③ Sinking test of floating fountain device: After the exhaust valve 63 and the inlet and outlet valve 61 of each lower buoyancy box are opened synchronously by computer control, since the air pressure in each lower buoyancy box 3 is lower than the water pressure in the box connected to the river water, water enters the lower buoyancy box 3, and the floating fountain device sinks. The computer understands and controls the sinking dynamics of the floating fountain device through the elevation mark and the GPS RTK mobile station, so that the floating fountain device sinks steadily to the designed minimum water level and is placed on the bracket 73. The computer controls the synchronous closing of the exhaust valve and the inlet and outlet valve of the lower buoyancy box;

[0162] ④ Floating fountain device buoyancy test: When the floating fountain device is completely submerged in water and placed on the bracket 73, the air compressor and the water inlet and outlet valves 61 of each section of the lower buoyancy box are synchronously opened through computer control, and compressed air is pressed into each section of the lower buoyancy box 3, and the water inlet and outlet valves 61 discharge the water in each section of the lower buoyancy box 3, so that the floating fountain device floats up. The computer understands and controls the floating dynamic situation of the floating fountain device through the elevation mark 8 and the GPS RTK mobile station, so that the floating fountain device floats up steadily to the highest design height, and the computer controls the synchronous closing of the water inlet and outlet valves of the lower buoyancy box 3;

[0163] ⑤Through the sinking and floating tests of the floating fountain device, debug the computer software so that it can automatically control the sinking and floating of the floating fountain device and achieve the expected purpose.

[0164] The above description is only a specific embodiment of the present invention. Those skilled in the art should understand that any structural design similar to this embodiment should be included in the protection scope of the present invention.

Claims

1. An automatic floating fountain device, comprising a float floating on the surface of a river and a fountain system (5) installed on the float, characterized in that The floating body comprises an upper buoyancy box (4), a rack (2) and a lower buoyancy box (3); the lower buoyancy boxes are respectively arranged on both sides of the rack (2), and the lower buoyancy boxes (3) and the top surface of the rack (2) form a floating structure; the lower buoyancy box (3) is evenly divided into sections and closed by a plurality of lower partitions (31) to form a plurality of independent sections; each section of the lower buoyancy box is equipped with a water inlet and outlet valve (61), an air intake valve (62) and an air exhaust valve (63); the air intake valve (62) is connected to an air compressor; each section of the lower buoyancy box has a circular cross-section; the upper buoyancy box (4) is arranged to surround the rack (2) and form a concave shape; the fountain system (5) is arranged in a concave shape, and the upper buoyancy box (4) is evenly divided into sections and independently sealed by a plurality of upper partitions (41) to form multiple sections; when the floating fountain device floats on the water surface at the designed water level, that is, when the upper buoyancy box (4) is partially exposed to the water surface and needs to sink, the exhaust valve (63) and the water inlet and outlet valve (61) of each section of the lower buoyancy box (3) are opened, and water is injected into each section of the lower buoyancy box (3) to make the floating fountain device sink completely; when the floating fountain device is completely submerged in water, the air compressor is opened to pressurize compressed air, and the water in the water inlet and outlet valve (61) is discharged from each section of the lower buoyancy box (3), so that the floating fountain device floats; The floating fountain device is connected and locked to a plurality of anchor blocks (72) sunk into the river bottom (1) through a plurality of anchor chains (71), and the maximum floating height of the floating fountain device is limited; the river bottom (1) is provided with a bracket (73), and the bracket and the plurality of anchor chains (71) connected to the anchor blocks (72) jointly limit the maximum sinking depth of the floating fountain device; the plurality of anchor chains (71), the plurality of anchor blocks (72) and the bracket (73) jointly form a limiting structure (7); the anchor chain (71) is a flexible chain, the anchor block (72) is a concrete block sunk into the river bottom, and one end of the anchor chain (71) is connected to the anchor block (72). The other end of the bent frame (2) is connected to an anchor block (72). The maximum floating height of the floating fountain device is controlled and locked by an anchor chain (71) and an anchor block (72) sunk into the riverbed. The anchor chain (71), the anchor block (72) and the center of the floating fountain device are symmetrically arranged. The bracket (73) is a reinforced concrete structure or a steel structure, and is composed of a plurality of pile foundations and a plurality of longitudinal and transverse beams. When the floating fountain device sinks, the bracket (73) limits the sinking to the deepest water level. The top and middle of the four corners of the plane of the buoyancy box (4) are equipped with an elevation mark (8). The elevation mark includes a circular tube and a GPS RTK mobile station on the top of the circular tube. The circular tube is sprayed with a water level line. The GPS RTK mobile station consists of three parts: a base station receiver, a data link, and a mobile station receiver. Alternatively, the Beidou RTK system is adopted. The mobile station has a waterproof performance of IP68, a seismic performance of 3G, and an operating temperature of -40°C to 65°C. A receiver is installed on the base station as a reference station to continuously observe the satellite, and the observation data and station information are sent to the mobile station in real time through a radio transmission device. While receiving the GPS satellite signal, the mobile station GPS receiver receives the data transmitted by the base station through a wireless receiving device, and calculates the three-dimensional coordinates and accuracy of the mobile station in real time according to the principle of relative positioning, converts the coordinates of the floating fountain device, and dynamically grasps the sinking and floating conditions of the floating fountain in real time. The opening and closing of the water inlet and outlet valves (61), the air inlet valve (62), and the exhaust valve (63), the water inlet and outlet flow, the sinking and floating time, and the compressor and the elevation mark (8), i.e., the GPS RTK mobile station, are remotely and centrally controlled by a computer, and the water inlet and outlet of the lower buoy (3) and the sinking and floating state of the floating fountain device are jointly controlled. The opening and closing of the fountain system (5), the water posture, and the sound and light color are also remotely and centrally controlled by a computer.

2. The automatic sinking and floating fountain device according to claim 1 is characterized in that When the floating fountain device floats on the water surface at the designed water level, the total amount is The length of each lower buoy (3) of the segment is At this time, a small amount of water is injected into each section to simplify the conversion to the length of the lower buoy (3) with the same cross section. , the lower buoyancy box (3) is analyzed in two situations: sinking and floating. When the floating fountain device sinks, the exhaust valve (63) and the water inlet and outlet valve (61) of each section of the lower buoyancy box (3) are opened. One end of the exhaust valve (63) is connected to the lower buoyancy box (3), and the other end is connected to the exhaust floating head (631) floating on the water surface. Water is then injected into each section of the lower buoyancy box (3) so that the floating fountain device is completely sunk and placed on the bracket (73) in the water. The depth from the center of the cross section of the lower buoyancy box (3) to the water surface is , The length of water injected at any time is The combined water inlet resistance of the circular cross section of each lower buoy (3) and the water inlet and outlet valves (61) is When the floating fountain device sinks and rests on the underwater bracket (73), the depth from the cross-sectional center of the lower buoyancy box (3) to the water surface is also , turn on the air compressor and press in the compressed air at a pressure of , The length of water discharged at a time is The circular cross-section of each lower buoy (3) and the combined drainage resistance of the inlet and outlet valves (61) are: Assuming that the volume of water injected into the buoyancy box (3) when sinking is equal to the volume of air discharged, that the compressed air pressed into each section of the buoyancy box and the water in each section of the buoyancy box (3) when floating are equal in volume, that is, incompressible, and that the water inflow and sinking process of each section of the buoyancy box (3) occur simultaneously, and the drainage and floating process of each section of the buoyancy box (3) occur simultaneously, according to fluid mechanics and Newton's law, the calculation formulas for the relevant parameters of the sinking and floating of the floating fountain device are as follows: Formula 1: When the floating fountain device sinks, the lower buoyancy box (3) sinks. The length of water inflow of each section of the lower buoyancy box (3) at the moment is The unit area resistance of water to the sinking of the floating fountain device is The water area around the floating fountain device is simplified to remain unchanged during the sinking process, which is equal to the product of the vertical area around the floating fountain device and the unit area resistance. ,when When the total water intake of the floating fountain device is , sinking force , sinking depth and the average water inflow per unit time They are 1. When The gas in the lower buoy (3) is just discharged to the length of the water inlet within the time. The floating fountain device simultaneously sinks to the designed water level, that is, the center of the cross section of the buoyancy box (3) sinks to the lowest designed water level, and the sinking time is calculated using Formula 1; (ii) When If the floating fountain device has sunk to the lowest design water level within the time limit, but the gas in the lower buoyancy box (3) has not been completely discharged, the water inlet and outlet valves (61) are closed to stop water from entering, or the water inlet flow rate of the water inlet and outlet valves (61) is reduced in advance to meet (I); (III) When The length of water in the upper and lower buoyancy boxes (3) during the time However, the floating fountain device did not sink to the minimum design depth, and the difference from the minimum design sinking depth was , the floating fountain device continues to sink Time for Formula 2: When the floating fountain device floats up, the lower float box (3) floats up. At the moment, each lower buoy (3) is at a compressed air intensity of The drainage length under the action is , the floating height is The resistance force per unit area of ​​water on the floating fountain device is The water area around the floating fountain device is simplified to remain unchanged during the floating process, that is, it is equal to the product of the vertical area around the floating fountain device and the unit area resistance. ,when The total water discharge of the floating fountain device , buoyancy , floating height and the average displacement per unit time They are 1. When The length of water discharged in the upper and lower buoyancy boxes (3) is just enough within the time. The floating fountain device simultaneously floats up to the design water level, that is, the center of the cross section of the lower buoyancy box floats up to the highest design water level, and the sinking time is calculated using Formula 1; (ii) When If the floating fountain device has risen to the highest design water level within the time limit, but the residual water in the lower buoyancy box (3) is greater than the pre-injected water volume in each section, the inlet and outlet valves (61) are closed to stop draining water or the drainage flow of the inlet and outlet valves is increased in advance to meet (I); (III) When The length of the drainage in the upper and lower buoys (3) during the time However, the floating fountain device did not float to the highest design water level, and the difference from the highest design water level was , the floating fountain device continues to float up Time for Pick The larger one is used as the inlet and outlet flow rate per unit time of the water inlet and outlet valve (61). Similarly, the sinking or floating time of the floating fountain device is calculated according to the principles of Formula 1 and Formula 2. The symbols in Formula 1 and Formula 2 are defined as: ——respectively the equally divided length and inner diameter of each section of the lower buoyancy box (3) and the total number of the segmented closed sections of the upper buoyancy box (4), ; ——respectively, the depth from the lowest design water level in the center of the cross section of the lower buoyancy box (3) to the water surface when the floating fountain device is sinking, or the height from the lowest design water level in the center of the cross section of the lower buoyancy box (3) to the water surface when the floating fountain device is floating, ; ——the difference between the lowest design water level and the highest design water level at the center of the cross section of the lower buoyancy box (3) when the floating fountain device sinks or floats, and the height of the water column converted from the standard atmospheric pressure of the river water acting on the floating fountain device, ; ——When the floating fountain device sinks, The length of water in the upper and lower buoyancy boxes (3) during the time However, the floating fountain device did not sink to the lowest design water level. The sinking water level at this time is the difference from the lowest design water level; or when The length of the drainage in the upper and lower buoys (3) during the time However, the floating fountain device did not float to the highest design water level. This is the difference between the floating water level at this time and the highest design water level. ; - When the floating fountain device sinks, a small amount of water is pre-injected into each lower buoyancy box (3) at the design height, which is simplified and converted into the length of the circular pipe of the lower buoyancy box with the same cross-section; or when the floating fountain device floats up, a small amount of water is left in each lower buoyancy box (3) and is simplified and converted into the length of the circular pipe of the lower buoyancy box with the same cross-section; , ; ——the pressure of the gas pressed into each lower buoyancy box (3) by the air compressor, ; ——respectively, the length and time of water intake or drainage of each section of the lower buoyancy tank (3), and It is also the time when the floating fountain device sinks or floats synchronously. ; ——When the floating fountain device sinks, The length of water in the upper and lower buoyancy boxes (3) during the time However, the floating fountain device has not sunk to the lowest design water level. The difference between the sinking water level and the lowest design water level is , continue to sink the time taken; or The length of the drainage in the upper and lower buoys (3) during the time However, the floating fountain device has not floated to the highest design water level. The difference between the floating water level and the highest design water level is , continue to float The time spent, ; ——When the floating fountain device sinks The depth from the center of the cross section of the lower buoyancy box (3) to the highest design water level at the moment, or when the floating fountain device floats up The height from the center of the cross section of the lower buoy (3) to the lowest design water level at the moment, ; - the designed water-inflow length of each section of the lower pontoon (3) or the designed water-discharge length of each section of the lower pontoon (3), , ; ——are respectively the pressure of the compressed air in the lower buoyancy box (3), the water pressure of the river water at the connection point between the center of the cross section of the lower buoyancy box (3) and the river water when the lower buoyancy box (3) sinks, and the water pressure of the river water at the connection point between the center of the cross section of the lower buoyancy box (3) and the river water when the lower buoyancy box (3) floats, ; ——Respectively The total water intake of the lower buoy (3) when sinking, The total displacement of the lower buoy (3) when it floats up, ; ——respectively, the average water intake of the lower buoyancy tank (3) per unit time and the average water discharge of the lower buoyancy tank (3) per unit time, ; ——Respectively The volume of water entering the buoy (3) when it sinks The sinking force and the displacement volume of the buoyancy box (3) when floating up The buoyancy of ; ——The water resistance force of the floating fountain device when it sinks or floats. To simplify the calculation, it is assumed that the water resistance force of the surrounding water area of ​​the floating fountain device remains unchanged during the sinking or floating process, that is, it is equal to the vertical area of ​​the surrounding area of ​​the floating fountain device. The product of the resistance per unit area is , ; ——respectively the circular cross-section of each section of the lower buoyancy box (3) and the inlet and outlet water comprehensive resistance of the inlet and outlet valves are simplified to the inlet and outlet water resistance per unit length of the peripheral area of ​​the lower buoyancy box (3), which is determined by experiments. If there is no test data, relevant information can be consulted. ; ——respectively the weight and density of water, ; ——are respectively the water flow acceleration of each section of the inner wall of the lower buoyancy box (3) when sinking and the water flow acceleration of each section of the inner wall of the lower buoyancy box (3) when floating, ; ——are respectively the sinking acceleration of the floating fountain device when the lower buoyancy box (3) sinks, and the rising acceleration of the floating fountain device when the lower buoyancy box (3) floats, ; ——When the floating fountain device sinks, each section of the upper buoyancy box (4) The mass of the length of water, the mass of the water not discharged when the floating fountain device floats, and the floating fountain device does not include The total mass of the water in the part, ; ——respectively the weight and density of water, .

3. The automatic sinking and floating fountain device according to claim 1 is characterized in that The rack (2) is composed of a circular pipe and a plate. The two ends of the circular pipe are welded to the lower buoyancy boxes (3) on both sides to form a tic-tac-toe frame. The plate is installed on the frame to form a closed concave internal plane, and the fountain system (5) is installed on the plane.

4. The automatic sinking and floating fountain device according to claim 1 is characterized in that The lower buoyancy box (3) is a circular pipe installed on both sides of the bent frame (2), and the circular pipe is welded to the two ends of the bent frame (2) to form the skeleton of the floating fountain device.

5. The automatic sinking and floating fountain device according to claim 1 is characterized in that The upper buoyancy box (4) has a closed trapezoidal cross-section. The upper buoyancy box (4) is arranged around the structure composed of the bent frame (2) and the lower buoyancy box (3), and forms a concave whole of the floating fountain device with the bent frame (2). The upper buoyancy box (4) and the circular pipe in the bent frame (2) together form a basic buoyancy box of the floating fountain device, providing basic buoyancy to maintain the floating fountain at the designed elevation.

6. The automatic sinking and floating fountain device according to claim 2 is characterized in that The water inlet and outlet valves (61) are two-way valves. After the water inlet and outlet valves are opened, the compressor is started to press compressed air of a designed air pressure into the air inlet valve (62). When the air pressure in each section of the lower buoyancy box (3) is higher than the water pressure in the box connected to the river, water is discharged from the lower buoyancy box (3). After the air exhaust valve (63) is opened, when the air pressure in each section of the lower buoyancy box (3) is lower than the water pressure in the box connected to the river, water enters the lower buoyancy box (3). The air inlet valve (62) is a one-way check valve connected to the air compressor. When the air pressure in each section of the lower buoyancy box (3) is lower than the water pressure in the box connected to the river, the check valve is closed to prevent water from entering the compressor. The exhaust floating head (631) is connected to the exhaust valve (63) through a hose and floats on the water surface to exhaust air, thereby preventing river water from entering the lower buoyancy box (3).

7. A method for operating the automatic sinking and floating fountain device according to claim 2, characterized in that The method comprises the following steps: Step 1: Determine the size of the automatic sinking and floating fountain device ① According to the owner's requirements and the terrain and geological drilling data, the size and layout of the automatic sinking and floating fountain device are initially planned, and the engineering materials and mechanical equipment are selected; ② The structural dimensions, layout and engineering materials of the automatic sinking and floating floating fountain device are verified and determined by the relevant mechanical principles, and the sinking and floating time of the floating fountain device, as well as the mechanical equipment and computer control parameters are verified and determined by Formula 1 and Formula 2; ③ Prepare construction organization design documents and organize construction; Step 2: construct and manufacture the rack (2), the lower buoyancy box (3), the upper buoyancy box (4), the limit structure (7), purchase the fountain system (5), valves, elevation mark (8) and GPS RTK system, and compile computer control software; ① Measure and lay out, and determine the precise position and elevation of the limit structure (7) according to the design drawings; ② Manufacturing the bent frame (2), the lower buoyancy box (3), the upper buoyancy box (4), and the limiting structure (7); ③ The construction and installation of the limiting structure (7) shall meet the design requirements; ④ Assemble the rack (2), the lower buoyancy box (3), and the upper buoyancy box (4) on the nearest land to form a floating fountain skeleton float. The welding and assembly quality of each joint meets the design requirements, and the parts that need rust prevention are treated with rust prevention; ⑤ Install various valves on the lower buoy (3), the technical indicators of various valves meet the design requirements, and assemble the GPS RTK system and elevation mark; ⑥ Carry out water injection test on the floating fountain skeleton to confirm that there is no water leakage. Reserve a small amount of water in each section of the floating box according to the design requirements, and simplify the conversion to the length of the circular tube of the floating box with the same cross section. ; ⑦ Compile computer control software for automatic sinking and floating floating fountains; Step 3: Install the floating fountain ① Drag the floating fountain skeleton to the water surface position required by the design; ②Measure the position of the floating fountain skeleton float, and firmly connect the floating fountain skeleton float to the anchor chain after accurate positioning; ③ Install an exhaust floating head (631) on the exhaust valve (63); ④Install the fountain system (5), elevation mark (8), GPS RTK mobile station and computer control system; Step 4: Debug the floating fountain ① Use the elevation mark (8) and GPS RTK mobile station to detect the overall elevation of the floating fountain skeleton float, requiring that the elevation of the top of the floating box meets the design requirements, and the errors of the four corners and the middle top points meet the design requirements; ② If it does not meet the design requirements, adjust the height of the top surface of the floating fountain device by injecting water, cement concrete or other heavy materials into a certain section of the upper buoyancy box (4) so ​​that the top surface of the floating fountain device exposed above the water surface is uniform and meets the design requirements; ③ Sinking test of the floating fountain device: After the exhaust valve (63) and the water inlet and outlet valve (61) of each section of the lower buoyancy box are opened synchronously by computer control, since the air pressure in each section of the lower buoyancy box (3) is lower than the water pressure in the box connected to the river water, water enters the lower buoyancy box (3), and the floating fountain device sinks. The computer understands and controls the sinking dynamics of the floating fountain device through the elevation mark and the GPS RTK mobile station, so that the floating fountain device sinks steadily to the designed minimum water level and is placed on the bracket (73). The computer controls the synchronous closing of the exhaust valve and the water inlet and outlet valve of the lower buoyancy box; ④ Floating fountain device buoyancy test: When the floating fountain device is completely submerged in water and placed on the bracket (73), the air compressor and the water inlet and outlet valves (61) of each section of the lower buoyancy box are synchronously opened through computer control, and compressed air is pressed into each section of the lower buoyancy box (3). The water in the water inlet and outlet valves (61) of each section of the lower buoyancy box (3) is discharged to make the floating fountain device float. The computer understands and controls the floating dynamic situation of the floating fountain device through the elevation mark (8) and the GPSRTK mobile station, so that the floating fountain device floats smoothly to the highest design height, and the computer controls the synchronous closing of the water inlet and outlet valves of the lower buoyancy box (3); ⑤Through the sinking and floating tests of the floating fountain device, debug the computer software so that it can automatically control the sinking and floating of the floating fountain device and achieve the expected purpose.

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