Ultrahigh-clearance and ultrahigh-wind-pressure air-supported film device for closed coal yard

Abstract

The utility model belongs to the technical field of closed coal yards, and particularly relates to an ultrahigh-clearance ultrahigh-wind-pressure air-supported film device for a closed coal yard. The utility model discloses an ultrahigh-clearance ultrahigh-wind-pressure air-supported membrane device for a closed coal yard. The device comprises an air blowing mechanism, a cable membrane mechanism and a foundation anchoring mechanism, the foundation anchoring mechanism is arranged at the bottom and used for bearing the cable membrane mechanism; the cable membrane mechanism is used for supporting a membrane body through air pressure to cover a large-span space where the foundation anchoring mechanism is arranged. The multiple air blowing mechanisms are arranged on the side edge of the cable membrane mechanism and used for blowing air into the cable membrane mechanism, and the cable membrane mechanism is supported by air pressure. The air film structure is improved, the high-strength and high-flexibility film material is adopted as the main material, the fan is used for increasing the air pressure in the sealed space so as to support the cable film mechanism, and the large-span structure system without a bearing in the middle can be met.

Description

Technical Field

[0001] The present invention belongs to the technical field of closed coal yards, and in particular relates to an ultra-high clearance and ultra-high wind pressure air bearing membrane device for closed coal yards. Background Art

[0002] Open-air coal storage violates current environmental protection requirements and causes pollution to the plant and surrounding areas. Furthermore, because pulverized coal is a dust-generating material, open-air storage leads to high waste rates and waste of resources. Therefore, coal yards are currently typically covered with air-film coal sheds to comply with environmental regulations and protect coal resources.

[0003] Typically, the dimensions of a coal shed in an air-film coal yard are based on the yard design. The height of the coal yard is determined based on the span, structural rationality, and the layout and usage of the indoor equipment, meeting on-site process requirements and maintaining a safe distance of at least 5 meters from the maximum size of the bucket-wheel stacker / reclaimer. To ensure sufficient travel for the bucket-wheel stacker / reclaimer, the membrane structures at the north and south ends of the air-film coal yard are designed to be nearly vertical and to accommodate wind loads.

[0004] Currently, there are three types of closed silos: air film greenhouse, skeleton membrane structure greenhouse, and color steel plate greenhouse. The comparison of the three structures is as follows:

[0005] The air-supported greenhouse system consists of a foundation anchoring mechanism, cable-membrane mechanism, ventilation mechanism, power supply mechanism, exhaust gas treatment system, monitoring mechanism, control system, lighting mechanism, fire protection mechanism, and steel dust removal mechanism. The structure weighs 2 kg / m2 and does not contain any steel structure. It has a long service life, with the membrane material having a normal service life of over 30 years. Construction can begin as soon as the project is approved, eliminating the need for a complex approval process. The cable-membrane mechanism is prefabricated by a specialized fabrication plant, and the equipment is custom-made by the supplier. After foundation construction is completed, the project construction period is approximately 10-15 days. Construction primarily involves ground-based assembly of the membrane material, installation of the cable net, and commissioning. This results in a short construction period, no overhead work, and low construction risk. However, the air-supported greenhouse requires a foundation anchoring mechanism for stability, and the cable-membrane mechanism typically requires a supporting structure to ensure sufficient strength.

[0006] The system composition of the skeleton membrane structure greenhouse includes: structure + PVDF membrane steel; the steel structure consumption per square meter is about 58kg + membrane weight 2kg = 60kg; the tube truss frame spacing is about 30 meters; the service life is long, and the normal service life of the membrane material is more than 20 years. The membrane material can effectively prevent rainwater from corroding steel components and extend the service life of the steel structure; the steel tube truss is assembled on the ground and then hoisted. Due to the use of steel tube trusses, the construction site occupancy is small and does not affect the yard operation, the hoisting cost is high, and the installation risk is high.

[0007] The system of a color-coated steel greenhouse consists of a structure and color-coated steel sheets. The steel structure weighs approximately 75kg per square meter, while the color-coated steel purlins weigh 15kg, totaling 90kg. The maximum column spacing is generally around 10 meters. The color-coated steel sheets are typically secured with self-tapping screws and sealed with a waterproof sealant. However, this type of roofing presents a risk of corrosion, with the roof panels typically corroding after two to three years, and the main structure also corroding after five to six years, resulting in a short service life. After the grid structure is assembled on the ground, multiple high-capacity cranes are required to lift the structure simultaneously, creating high risks. Ground assembly requires the entire work area, impacting normal operation of the yard. Working at height and the risk of collapse are constant.

[0008] In summary, air membrane structures are a truly fully enclosed, environmentally friendly form of material yard enclosure, offering excellent ventilation, dust reduction, and fire prevention capabilities, ensuring the cleanliness and safety of the coal yard (material yard) and its surroundings. However, existing designs cannot meet the requirements for large-span coal yard construction. Therefore, improvements are urgently needed. Summary of the Invention

[0009] The purpose of the present invention is to solve the above-mentioned shortcomings and provide an ultra-high clearance and ultra-high wind pressure air-bearing membrane device for closed coal yards.

[0010] In the first aspect, an ultra-high clearance and ultra-high wind pressure air bearing membrane device for a closed coal yard adopts the following technical solutions:

[0011] An ultra-high clearance and ultra-high wind pressure air-bearing membrane device for closed coal yards, the device comprising an air blowing mechanism, a cable membrane mechanism, and a foundation anchoring mechanism;

[0012] The basic anchoring mechanism is arranged at the bottom and is used to support the cable-membrane mechanism;

[0013] The cable-membrane mechanism is used to support the membrane body through air pressure to cover the large-span space where the foundation anchoring mechanism is arranged;

[0014] The blowing mechanisms are provided in plurality and are arranged on the side of the cable-membrane mechanism for blowing air into the cable-membrane mechanism so that the air pressure supports the cable-membrane mechanism.

[0015] Furthermore, the cable-membrane mechanism includes an air membrane and a cable net, and the cable net is a longitudinal and transverse cross cable, and covers the surface of the air membrane.

[0016] Furthermore, the cable spacing of the cable net is more than 2m, and the diameter of the steel core wire rope of the longitudinal and transverse cross cables is not less than 22mm.

[0017] Furthermore, the foundation anchoring mechanism and the cable-membrane mechanism are connected by nodes, and the positions of the node connection and the foundation anchoring mechanism are adjusted accordingly according to the characteristics of the wind load of the project.

[0018] Furthermore, the foundation anchoring mechanism includes a retaining wall, and the retaining wall is configured to enclose a space where the cable-membrane mechanism requires a large span.

[0019] Furthermore, a plurality of the blowing mechanisms are arranged side by side and located on the same side of the cable-membrane mechanism.

[0020] Furthermore, a plurality of pressure relief valves are provided on the retaining wall on the side of the cable-membrane mechanism.

[0021] Furthermore, an exhaust valve is provided on the side of the foundation anchoring mechanism opposite to the blowing mechanism for exhausting air when needed.

[0022] Furthermore, the cable-membrane mechanism is provided with a plurality of partitions, and adjacent partitions are separated by fireproof partition passages or trestles.

[0023] Furthermore, a personnel access door and an emergency door are provided on the side of the cable-membrane mechanism; and a car passage is provided on at least one side of the cable-membrane mechanism.

[0024] Beneficial effects of the present invention:

[0025] The present invention provides an ultra-high clearance and ultra-high wind pressure air-bearing membrane device for closed coal yards. The device supports the entire cable-membrane structure through the internal and external air pressure difference. There cannot be any frame or beam support inside, and there cannot be any components subject to bending, torsion and compression. The requirements for large spans are met, and the curvature of the air membrane design maximizes the working space of the bucket wheel excavator. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an ultra-high clearance and ultra-high wind pressure air-bearing membrane device for a closed coal yard implemented by the present invention.

[0027] Figure 2 yes Figure 1 Top view of the structure shown.

[0028] Figure 3 yes Figure 1 Transverse cross-sectional view of the structure shown.

[0029] Figure 4 yes Figure 1 Longitudinal cross-sectional view of the structure shown.

[0030] In the figure, 1 is the cable membrane mechanism, 2 is the blowing mechanism, 3 is the fog cannon, 4 is the emergency door, 5 is the car passage, 6 is the personnel entrance and exit door, 7 is the fire partition passage, 8 is the trestle, 9 is the pressure relief valve, 10 is the exhaust valve, and 11 is the retaining wall. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] Figure 1-4 As shown, the ultra-high clearance and ultra-high wind pressure air-bearing membrane device for closed coal yards implemented by the present invention comprises an air blowing mechanism 2, a cable membrane mechanism 1, and a foundation anchoring mechanism;

[0033] The basic anchoring mechanism is arranged at the bottom and is used to support the cable-membrane mechanism 1;

[0034] The cable-membrane mechanism 1 is used to support the membrane through air pressure to cover the large-span space where the foundation anchor mechanism is arranged;

[0035] The blowing mechanisms 2 are provided in plurality and are arranged on the side of the cable-membrane mechanism 1 , and are used to blow air into the cable-membrane mechanism 1 so that the air pressure supports the cable-membrane mechanism 1 .

[0036] The cable-membrane mechanism 1 includes an air membrane and a cable net. The cable net is a longitudinal and transverse cross-cable and covers the surface of the air membrane.

[0037] The cable spacing of the cable net is more than 2m, the diameter of the steel core wire rope is not less than 22mm, and a double cable net is selected in local positions.

[0038] For example, the air membrane is made of high-strength, high-flexibility film material as the main material and is built using the air pressure support principle in a sealed space. The air membrane is a structure that relies on the internal and external air pressure difference to support the entire air membrane structure.

[0039] Normally, the height of the air film is required to have a span ratio of not less than 1 / 3 and not more than 1 / 2, and the air film is a flexible structure.

[0040] Before designing the air dome, we analyze different load combinations based on the project's climate. We then create a precise three-dimensional model and computational grid, set the required material and environmental parameters, and perform precise analysis and calculations to obtain key data such as the reaction force of the foundation retaining wall, the membrane surface bearing capacity, the axial force of the cable net, and the structural displacement. Based on this calculated data, we select the membrane material and cable net that meet the requirements, ensuring the safe operation of the air dome structure and its ability to withstand strong wind loads.

[0041] The membrane material has a tensile strength (warp / weft) of 9500 / 9000N / 5cm; a tear strength of no less than 1300N; and a peel strength of no less than 130N / 5cm. During subsequent membrane processing and welding, the weld strength must be no less than 85% of the membrane's inherent strength, and the weld seam width must be no less than 80mm. In the event of strong winds or typhoons, the membrane unit transfers its load to the L-shaped pre-embedded and cross-cable net system. The net distributes the force to the U-shaped pre-embedded anchors of the retaining wall and the foundation. This ensures the safe operation of the air membrane structure even with membrane surface displacement within the designed range.

[0042] Based on the cross cable net, the number or diameter of the cable nets is increased according to calculations at local locations and main wind load bearing surfaces, and double cable nets can be selected at local locations.

[0043] The foundation anchoring mechanism and the cable-membrane mechanism 1 are connected by nodes, and the positions of the node connections and the foundation anchoring mechanism should be adjusted accordingly based on the characteristics of the project's wind load.

[0044] The foundation anchoring mechanism includes a retaining wall 11 , which is provided to enclose a space where the cable-membrane mechanism 1 requires a large span.

[0045] The cable-membrane mechanism 1 is fixed on the retaining wall 11 .

[0046] Several blowing mechanisms 2 are arranged side by side and located on the same side of the cable-membrane mechanism 1. When the blowing mechanisms 2 on the same side work, the wind force can act in unison, so that the air pressure in the cable-membrane mechanism is large enough, thereby using the air pressure to support the membrane body to cover a large span space.

[0047] Exemplarily, the blowing mechanism 2 is a fan.

[0048] The set pressure difference value of the air membrane under normal operating conditions is 280Pa. The fan can set several air pressure gears according to the wind load, increasing by 40Pa each time. Under special circumstances (such as typhoon conditions), the air pressure can reach 700Pa~800Pa to maintain the stability of the air-supported membrane structure.

[0049] The present invention arranges all fans on the same side of the cable-membrane mechanism 1, and provides wind force to the cable-membrane mechanism 1 to the maximum extent through the same blowing mode, so that the pressure inside the cable-membrane mechanism 1 is kept sufficient. In this way, the cable-membrane mechanism 1 can be effectively supported, thereby supporting the entire air membrane structure by the internal and external air pressure difference. No other supporting structures are required, which facilitates construction, shortens the construction period, and greatly increases safety.

[0050] Among them, how to control the displacement of the air film under wind load is an important indicator. In the present invention, a detailed analysis is conducted on the specific wind load to determine the correlation between wind speed and internal pressure, and the power and number of fans are configured accordingly.

[0051] Specifically, for the displacement problem caused by wind load, a zoning study is conducted. According to the actual site conditions and combined with the surrounding buildings, the wind load is calculated and analyzed from different angles with different values, so as to reduce the impact of wind load on the building.

[0052] Therefore, the present invention improves the air membrane structure, adopts high-strength and high-flexibility film materials as the main materials, and uses a fan to increase the air pressure in the sealed space to support the cable-membrane mechanism. As a result, the air membrane relies on the internal and external air pressure difference to support the entire air membrane structure. The force system is direct, simple and reasonable, and can meet the needs of a large-span structural system without support in the middle.

[0053] Furthermore, in order to maintain pressure, a pressure relief valve 9 is provided on the retaining wall 11 on the side of the cable-membrane mechanism 1 . Usually, a plurality of pressure relief valves 9 are provided to meet the pressure relief requirements.

[0054] An exhaust valve 10 is provided on the side of the foundation anchoring mechanism opposite to the blowing mechanism 2 to exhaust air when needed.

[0055] The exhaust valve 10 is arranged on the retaining wall 11 for easy fixation. In the embodiment of the present invention, a total of 18 exhaust valves 10 are configured, and the hole size of the exhaust valve 10 is 1000*1000.

[0056] Furthermore, for ease of use, a personnel access door 6 and an emergency door 4 are provided on the side of the cable-membrane mechanism 1 for daily access and emergency use.

[0057] In order to increase the pressure support of the cable-membrane mechanism 1 , the cable-membrane mechanism 1 is provided with a plurality of partitions, and adjacent partitions are separated by fireproof partition passages 7 or trestles 8 .

[0058] For example, Figure 1 As shown, the cable-membrane mechanism 1 is provided with four partitions A, B, C, and D. Partition A and partition B are separated by a fire partition passage 7, and trestles 8 are provided between partitions AB and CD.

[0059] Several fans are set on the same side of the two partitions AB to blow air to the four partitions, thereby providing internal pressure of the cable-membrane mechanism 1; exhaust valves 10 are also set on the side opposite to the fans in the two partitions CD to exhaust air when needed.

[0060] A vehicle passage 5 is provided on at least one side of the cable-membrane mechanism 1 so that vehicles can travel and transport coal resources.

[0061] Typically, automobile passages 5 are provided on both corresponding sides of the cable-membrane mechanism 1 , and two corresponding automobile passages 5 are provided on each side to facilitate the transportation of coal resources.

[0062] Furthermore, the device also includes a power supply mechanism, a dust removal mechanism, an exhaust gas treatment mechanism, a fire protection mechanism, a monitoring mechanism, and a lighting mechanism. It can also be controlled by a control system. The control system usually adopts a PLC control system, which is also an existing technology and will not be repeated here.

[0063] The power supply mechanism uses two power supply lines and is also equipped with a backup generator, both of which can automatically switch. Considering the possibility of power outages in extreme weather conditions, a 300kW generator is selected based on the number and power of wind turbines to ensure that the wind turbine system can quickly replenish pressure in extreme situations.

[0064] The dust removal mechanism 2 is a mist cannon, which is symmetrically arranged in the cable-membrane mechanism 1 to remove dust and purify the cable-membrane mechanism 1.

[0065] In order to increase the stability of the air membrane structure, the foundation anchoring mechanism needs to be piled, that is, piles are first driven and then the foundation anchoring mechanism is fixed by pile foundations to strengthen the foundation and make the foundation anchoring mechanism more stable.

[0066] At the same time, for different areas, piles are arranged in different areas and different pile lengths are selected to achieve economic rationality.

[0067] In summary, the air membrane structure of the present invention utilizes a high-strength, flexible film material for its membrane, and utilizes air pressure to support the membrane to cover large spans. This offers significant advantages in both initial construction costs and subsequent maintenance costs. Furthermore, the lack of steel structures and skeleton membranes eliminates the need for high-altitude operations, resulting in a safer construction. Consequently, the structure is easy to construct, shortening the construction period; maintenance is simple and safe; and the cost is lower than traditional buildings, resulting in better economic efficiency.

[0068] The present invention is a structure that supports the entire air film structure by the difference in internal and external air pressure. There cannot be any frame or beam support inside, and there cannot be any components that are subject to bending, torsion and compression. It meets the requirements of large span, and the curvature of the air film design meets the maximum operating space of the bucket wheel excavator.

[0069] The present invention is applicable to air film type fully enclosed coal yard environmental protection facilities.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An ultra-high clearance and ultra-high wind pressure air bearing membrane device for closed coal yard, characterized in that: The device includes an air blowing mechanism, a cable membrane mechanism, and a foundation anchoring mechanism; The basic anchoring mechanism is arranged at the bottom and is used to support the cable-membrane mechanism; The cable-membrane mechanism is used to support the membrane body through air pressure to cover the large-span space where the foundation anchoring mechanism is arranged; The blowing mechanisms are provided in plurality and are arranged on the side of the cable-membrane mechanism for blowing air into the cable-membrane mechanism so that the air pressure supports the cable-membrane mechanism.

2. The ultra-high clearance and ultra-high wind pressure air bearing membrane device for closed coal yard according to claim 1 is characterized in that: The cable membrane mechanism includes an air membrane and a cable net. The cable net is a longitudinal and transverse cross cable and covers the surface of the air membrane.

3. The ultra-high clearance and ultra-high wind pressure air bearing membrane device for closed coal yard according to claim 2 is characterized in that: The cable spacing of the cable net is more than 2m, and the diameter of the steel core wire rope of the longitudinal and transverse cross cables is not less than 22mm.

4. The ultra-high clearance and ultra-high wind pressure air bearing membrane device for a closed coal yard according to any one of claims 1 to 3, characterized in that: The foundation anchoring mechanism and the cable-membrane mechanism are connected by nodes, and the positions of the node connections and the foundation anchoring mechanism are adjusted accordingly according to the characteristics of the wind load of the project.

5. The ultra-high clearance and ultra-high wind pressure air bearing membrane device for closed coal yard according to claim 4 is characterized in that: The foundation anchoring mechanism comprises a retaining wall, which is arranged to enclose a space where a cable-membrane mechanism requires a large span.

6. The ultra-high clearance and ultra-high wind pressure air bearing membrane device for closed coal yard according to claim 5, characterized in that: A plurality of the blowing mechanisms are arranged side by side and are located on the same side of the cable-membrane mechanism.

7. The ultra-high clearance and ultra-high wind pressure air bearing membrane device for closed coal yard according to claim 6, characterized in that: A plurality of pressure relief valves are also provided on the retaining wall on the side of the cable-membrane mechanism.

8. The ultra-high clearance and ultra-high wind pressure air bearing membrane device for closed coal yard according to claim 7, characterized in that: An exhaust valve is provided on the side of the foundation anchoring mechanism opposite to the blowing mechanism for exhausting air when needed.

9. The ultra-high clearance and ultra-high wind pressure air bearing membrane device for closed coal yard according to claim 8, characterized in that: The cable membrane mechanism is provided with a plurality of partitions, and adjacent partitions are separated by fireproof partition passages or trestle bridges.

10. The ultra-high clearance and ultra-high wind pressure air bearing membrane device for closed coal yard according to claim 9, characterized in that: A personnel access door and an emergency door are also provided on the side of the cable-membrane mechanism; and a car passage is provided on at least one side of the cable-membrane mechanism.

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