Truss skin dome for circular silos

Abstract

The utility model discloses a kind of rigid frame skin dome for circular shallow storehouse, including several dome rigid frame, center steel platform and skin, the top of dome rigid frame is fixedly connected with center steel platform, bottom is installed in the storehouse top ring beam of circular shallow storehouse, skin is laid on the outer surface of dome rigid frame to form closed structure, each accessory can be spliced in factory production site or directly made on site, and the construction of circular shallow storehouse is independent, shorten construction period, reduce construction cost;Center steel platform adopts the design of circular, provide convenience for routine maintenance and maintenance of storehouse top equipment, also reduce maintenance cost;Through skin, dome rigid frame and center steel platform are closed, improve the overall stiffness, enhance waterproof and dustproof performance;Dome rigid frame is arc, fully utilizes the space around storehouse top material tip, improves comprehensive economy.

Description

Technical Field

[0001] This utility model relates to the field of dome structure technology, and in particular to a rigid frame skin dome for a circular shallow silo. Background Technology

[0002] Circular shallow silos are a common type of environmentally friendly storage facility, widely used in agriculture for storing granular and powdery materials such as grains and feed, and in industry for storing bulk materials such as coke, cement, salt, and sugar. Using circular shallow silos to store bulk materials improves storage efficiency, reduces land occupation, and eliminates dust, effectively preventing pollution to the external environment. In existing technologies, the dome of a circular shallow silo is typically made of concrete.

[0003] However, the complex structure of the concrete dome increases the difficulty of construction and prolongs the construction period. It usually requires full-scale scaffolding during construction, resulting in high construction costs. After the dome structure is formed, the space for dismantling the internal formwork and scaffolding is greatly restricted, further extending the construction period. At the same time, the concrete beam-slab platform used in the dome structure also has shortcomings, such as limited maintenance space for entering the circular shallow silo from the dome, which increases the difficulty of maintaining the facilities and equipment inside the silo. Due to the failure to make full use of the space around the material tip, the overall economic efficiency is poor.

[0004] Therefore, the existing dome structure needs to be improved, which can not only reduce the difficulty of construction and maintenance, reduce construction costs, and shorten the construction period, but also make full use of the space around the material tip of the circular shallow silo and improve the overall economy. Utility Model Content

[0005] In view of the shortcomings of current dome structures, the purpose of this utility model is to provide a rigid frame skin dome for circular shallow silos, which can not only reduce construction and maintenance difficulties, reduce construction costs, and shorten the construction cycle, but also make full use of the space around the material tip of the circular shallow silo and improve overall economic efficiency.

[0006] To achieve the purpose of this utility model, this utility model provides a rigid frame skin dome for a circular shallow silo, comprising several dome rigid frames, a central steel platform and a skin, wherein the top of the dome rigid frame is fixedly connected to the central steel platform and the bottom is installed on the silo top ring beam of the circular shallow silo, and the skin is laid on the outer surface of the dome rigid frame to form a closed structure.

[0007] Furthermore, the dome frame is arranged in an array along the circumference of the central steel platform, and the upper edge of the dome frame is arc-shaped.

[0008] Furthermore, the dome frame is arched, including an upper chord beam, a lower chord beam, and web members. The upper chord beam is arc-shaped, and the bottom of the upper and lower chord beams are directly connected to the roof ring beam of the circular shallow silo.

[0009] Furthermore, the upper chord beam is fixed to the top of the silo top ring beam, and the lower chord beam is fixed to the inner side of the silo top ring beam.

[0010] Furthermore, it also includes inter-beam supports located between adjacent dome frames.

[0011] Furthermore, the skin is arc-shaped, and its radial cross-section conforms to the upper edge of the upper chord beam.

[0012] Furthermore, the skin is radially welded and fixed to the upper edge of the upper chord beam;

[0013] The inner surface of the skin is provided with several stiffening ribs at equal intervals along the radial direction, and adjacent skins overlap the stiffening ribs in the weft direction and are welded and fixed.

[0014] Furthermore, the central steel platform is provided with a platform ring beam along its edge, and the upper flange of the platform ring beam is welded and fixed to the skin.

[0015] Furthermore, the top of the warehouse roof ring beam is provided with a dome support for fixing the upper chord beam, and an annular rectangular tube is provided between the dome supports. Rubber pads are arranged along the circumference of the warehouse roof ring beam at the bottom of the dome supports and the bottom of the annular rectangular tube.

[0016] It also includes a node plate, through which the lower chord beam is fixedly connected to the inner side of the silo top ring beam.

[0017] Furthermore, the skin covers the top and part of the outer side of the annular rectangular tube and is welded and fixed.

[0018] The beneficial effects of this utility model are as follows: The rigid frame skin dome for a circular shallow silo includes several dome frames, a central steel platform, and a skin. The top of the dome frames is fixedly connected to the central steel platform, and the bottom is installed on the silo roof ring beam of the circular shallow silo. The skin is laid on the outer surface of the dome frames to form a closed structure. Each component can be assembled on-site in the factory or directly fabricated on-site, which is independent of the construction of the circular shallow silo, shortening the construction cycle and reducing construction costs. The circular design of the central steel platform facilitates daily inspection and maintenance of the silo roof equipment and also reduces maintenance costs. By enclosing the dome frames and the central steel platform with the skin, the overall rigidity is improved, and the waterproof and dustproof performance is enhanced. The arched shape of the dome frames makes full use of the space around the material tip on the silo roof, improving overall economic efficiency. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a structural schematic diagram of the rigid frame skin dome for a circular shallow silo according to the present invention;

[0021] Figure 2 for Figure 1 Enlarged view of point A;

[0022] Figure 3 for Figure 1 Enlarged view of point B;

[0023] Figure 4 for Figure 1 Enlarged view of point C;

[0024] Figure 5 This is a plan view of the dome frame;

[0025] Figure 6 This is a planar schematic diagram of the skin.

[0026] Attached reference numerals: 1. Ring beam of the circular shallow silo roof; 2. Dome frame; 201. Upper chord beam; 202. Web member; 203. Lower chord beam; 3. Central steel platform; 301. Platform ring beam; 4. Skin; 5. Inter-beam support; 6. Stiffening rib; 7. Dome support; 701. Annular rectangular tube; 702. Rubber pad; 8. Node plate. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-6 The present invention will be described in further detail below.

[0028] This utility model discloses a rigid frame skin dome for a circular shallow silo, comprising several dome frames 2, a central steel platform 3, and a skin 4. The top of the dome frames 2 is fixedly connected to the central steel platform 3, and the bottom is installed on the silo roof ring beam 1 of the circular shallow silo. The skin 4 is laid on the outer surface of the dome frames 2 to form a closed structure. Figure 1As shown, the dome frame 2 is radially distributed, with its top converging at the central steel platform 3 and its bottom fixed to the roof ring beam 1 of the circular shallow silo, forming a stress-bearing structure similar to umbrella ribs. This structure effectively disperses external loads, such as self-weight, wind load, or snow load, by transferring loads through the axial compression / tension of the dome frame 2, thus avoiding localized stress concentration. The central steel platform 3 serves as the top support point, and its torsional resistance can be improved using conventional techniques, such as reducing the spacing of the platform's secondary beams or optimizing the node structure, which will not be elaborated here. The dome frame 2 and the roof ring beam 1, the dome frame 2 and the central steel platform 3... The connection nodes of the central steel platform 3 can adopt a standardized design, facilitating rapid installation and positioning, and improving construction accuracy; details will not be elaborated further here. The supporting frame formed by the dome frame 2 and the central steel platform 3 can cover a large span, typically with a shallow circular silo diameter of tens of meters, and without internal columns to obstruct the view, providing ample usable space for equipment placement within the silo. Simultaneously, the skin 4 is laid on the outer surface of the dome frame 2 to form a closed system. This construction method is relatively simple, reducing the difficulty and complexity of high-altitude operations, which helps ensure construction quality and safety. It also effectively prevents rainwater and dust from entering the silo, providing excellent protection for the stored materials. For storing grains and other materials susceptible to moisture and contamination, it maintains a dry and clean storage environment, reducing the risk of material spoilage and extending the storage period. Furthermore, the skin 4 can be made of durable materials, such as corrosion-resistant steel plates, which can resist external environmental erosion. Working together with the dome frame 2, it increases the service life of the dome and reduces maintenance costs.

[0029] In this embodiment, the dome frame 2 is arranged in an array along the circumference of the central steel platform 3, and the upper edge of the dome frame 2 is arc-shaped. The array arrangement along the circumference makes the dome frame 2 form a symmetrical structure around the central steel platform 3, which can evenly transfer the top load to the central steel platform 3 and the top ring beam 1 of the circular shallow silo, avoiding local stress concentration and improving the overall structure's resistance to deformation. Further details are omitted here. The arc-shaped upper edge of the dome frame 2 has the characteristics of optimizing stress performance, reducing material consumption, reducing costs, and enhancing adaptability to large spans. The combination of the array arrangement along the circumference of the central steel platform 3 and the arched profile design can naturally form a dome space with an open top and no column obstruction, improving space utilization and also having a certain degree of aesthetics and practicality. Further details are omitted here.

[0030] In this embodiment, the dome frame 2 is arched, comprising an upper chord beam 201, a lower chord beam 203, and a web member 202. The upper chord beam 201 is arc-shaped, and the bottoms of the upper chord beam 201 and the lower chord beam 203 are directly connected to the roof ring beam 1 of the circular shallow silo. The dome frame 2, composed of the upper chord beam 201, the web member 202, and the lower chord beam 203, primarily bears axial tensile or compressive forces, fully utilizing material strength. Compared to solid web beams, the dome frame 2 can better withstand loads when the span is large or the load is large. The load is evenly transferred to the top ring beam 1 of the silo to ensure the stability of the silo structure. The dome frame 2 can be prefabricated in the factory and then transported to the construction site for assembly. Its structural form is relatively standard. The upper chord beam 201 and the lower chord beam 203 are directly connected to the top ring beam 1 of the silo. The connection method is clear, which can improve construction efficiency and shorten the construction cycle. Since the dome frame 2 can give full play to the mechanical properties of the material, the amount of steel and other materials can be reduced while meeting the load-bearing requirements, thus reducing production costs. This will not be elaborated further here.

[0031] In this embodiment, the upper chord beam 201 is fixed to the top of the silo roof ring beam 1, and the lower chord beam 203 is fixed to the inner side of the silo roof ring beam 1. The upper chord beam 201, fixed to the top of the silo roof ring beam 1, distributes the load borne by the rigid frame skin dome to the perimeter of the silo roof ring beam 1, preventing damage and instability caused by localized stress concentration. The lower chord beam 203, fixed to the inner side of the silo roof ring beam 1, effectively adds a lateral anchor point to the dome rigid frame 2, working in conjunction with the upper chord beam 201 and the silo roof ring beam 1. The connection at the top of the top ring beam 1 is designed to efficiently transfer the vertical and horizontal forces generated by strong winds and snow accumulation on the dome, thus improving the overall stability of the structure. As the main load-bearing structure of the circular shallow silo, the top ring beam 1 has a greater thickness and reinforcement than the sidewall of the silo. The lower chord beam 203 is fixed to the inner side of the top ring beam 1, eliminating the need for additional components such as corbels and supports to fix the dome frame 2. This simplifies the structural design of the top ring beam 1, reduces material consumption and construction complexity, and will not be elaborated further here.

[0032] In this embodiment, a beam support 5 is also included. The beam support 5 is located between adjacent dome frames 2. A single dome frame 2 can only bear the load in its own plane. However, after the adjacent dome frames 2 are connected by the beam support 5, multiple dome frames 2 form a spatial grid structure, which improves the lateral stiffness and torsional stiffness. This will not be elaborated further here. When the beam support 5 is in the form of a diagonal brace, the adjacent dome frames 2 and the beam support 5 form a triangular unit. For example, the upper chord beam 201, the beam support 5, and the upper chord beam 201 of the adjacent dome frame 2 form a triangle. The geometric stability of the triangle is used to improve the stability of the overall structure. The beam support 5, as a horizontal force transmission component, can support a single dome frame 2. The horizontal load borne by the platform is transferred to the adjacent dome frame 2, realizing the redistribution of the load in the circumferential dome frame group 2. For the vertical load transferred by the central steel platform 3, the beam support 5 can distribute the central load circumferentially to multiple dome frames 2 by connecting the upper chord beam 201 or lower chord beam 203 of each dome frame 2. During the hoisting stage of the dome frame 2, the beam support 5 can be used as a temporary positioning component. First, the main dome frame 2 is installed and temporarily fixed. Then, the adjacent dome frames 2 are connected by the beam support 5. The length accuracy of the beam support 5 is used to adjust the spacing between the dome frames 2, ensuring that the multiple dome frames 2 are evenly distributed circumferentially, improving installation efficiency and accuracy, reducing material waste, and lowering production costs.

[0033] In this embodiment, the skin 4 is arc-shaped, and its radial cross-section conforms to the upper edge of the upper chord beam 201. The arc-shaped radial cross-section of the skin 4 completely fits the arc-shaped upper edge of the upper chord beam 201, making the skin 4 not only a sealing layer but also capable of higher load-bearing capacity and less deformation at the same thickness. The conformal design refers to the fact that the curvature and length of the skin 4 are completely matched with the upper chord beam 201. The conformal design makes the contact area between the skin 4 and the upper chord beam 201 larger and the fit tighter. Under temperature changes or vibration loads, the deformation trends of the two are consistent, reducing friction, pulling, or loosening caused by shape mismatch, and extending the service life of the connection node between the skin 4 and the upper chord beam 201. This reduces later maintenance costs. The skin 4 fits perfectly with the upper edge of the upper chord beam 201, avoiding wrinkles, voids, or overlapping gaps caused by shape mismatch. The conformal design allows the skin 4 to form a continuous, smooth, closed curved surface after laying. Combined with the beam support 5, it strengthens the overall integrity of the frame, enhances the overall structural sealing, and improves wind and water resistance. The radial section of the skin 4 conforms to the upper edge of the upper chord beam 201, meaning that the skin 4 can be pre-customized in the factory according to the arc parameters of the upper chord beam 201. During on-site laying, there is no need for repeated cutting and adjustment; it can simply be fixed in the preset position, greatly improving construction accuracy and efficiency and reducing high-altitude work time. Further details are omitted here.

[0034] In this embodiment, the skin 4 is radially welded and fixed to the upper edge of the upper chord beam 201. Radial refers to the direction along the radius of the circular shallow chamber, and lateral refers to the direction along the circumferential tangent of the circular shallow chamber (perpendicular to the radius), which will not be elaborated here. The upper chord beam 201 serves as the top load-bearing component of the dome frame 2, and its upper edge is the outermost contour of the dome frame 2. The skin 4 is directly laid on it radially and welded to form a seal, which avoids gaps caused by the skin 4 covering the side or bottom of the dome frame 2. It completely isolates external factors such as rainwater, dust and insects from the outside of the dome, and also simplifies the construction process and improves construction efficiency.

[0035] The inner surface of the skin 4 is provided with a number of stiffening ribs 6 at equal intervals along the radial direction. Adjacent skin 4 pieces overlap the stiffening ribs 6 in the latitudinal direction and are welded and fixed. The skin 4 itself is relatively thin. If it only relies on the connection with the upper chord beam 201, it is prone to local bulging or denting when subjected to strong winds, snow accumulation, or negative pressure. The stiffening ribs 6 are distributed at equal intervals along the radial direction from the center of the dome to the edge, which is equivalent to adding a longitudinal skeleton to the skin 4. Through the rigid connection with the inner side of the skin 4, the overall rigidity of the skin 4 is improved. For a circular shallow chamber with a large diameter, the coverage area of ​​a single skin 4 increases accordingly. Without the support of stiffening ribs 6, the skin is prone to sagging under its own weight or external forces. The radially evenly distributed stiffening ribs 6 can reasonably divide the support according to the span. The spacing allows the large-sized skin 4 to remain flat without increasing its thickness to enhance rigidity, thus saving material costs. The overlap between adjacent skins 4 is a weak point in the seal. If the overlap is directly applied to the flexible skin, the seam is prone to loosening due to skin deformation. The stiffening rib 6 provides a rigid base for the overlap. When the skin 4 overlaps on the stiffening rib 6, the connection can be fixed to the stiffening rib 6 as a whole by welding, making the strength and stability of the seam much higher than that of a simple skin overlap. This effectively prevents rainwater and dust from seeping into the seam. The stiffening rib 6 is evenly distributed radially, providing standardized positioning lines for the overlap of adjacent skins 4, avoiding seal misalignment caused by irregular overlap positions. This will not be elaborated further here.

[0036] In this embodiment, the edge of the central steel platform 3 is provided with a platform ring beam 301. The upper flange of the platform ring beam 301 is welded and fixed to the skin 4. The platform ring beam 301 is usually made of H-beam or channel steel. It is prefabricated into a ring structure according to the edge dimensions (such as diameter or circumference) of the central steel platform 3 to ensure that the curvature of the platform ring beam 301 matches the edge of the central steel platform 3. During prefabrication, the upper flange of the platform ring beam 301 should have a flat surface and no burrs, and the width should meet the overlap length requirements for welding with the skin 4. This will not be elaborated further here.

[0037] In this embodiment, the top of the silo top ring beam 1 is provided with a dome support 7 for fixing the upper chord beam 201. An annular rectangular tube 701 is arranged between the dome supports 7. Rubber pads 702 are arranged along the circumference of the silo top ring beam 1 at the bottom of the dome supports 7 and the bottom of the annular rectangular tube 701. It also includes a node plate 8, through which the lower chord beam 203 is fixedly connected to the inner side of the silo top ring beam 1. Figure 3 and Figure 4 As shown, the upper chord beam 201 is fixed to the top of the silo top ring beam 1 via a dome support 7. The dome support 7 can be installed on the top of the silo top ring beam 1 by welding or bolting to the pre-embedded parts on the top of the silo top ring beam 1. The lower chord beam 203 is fixed to the inner side of the silo top ring beam 1 via a node plate 8. The node plate 8 can be welded to the pre-embedded parts on the inner side of the silo top ring beam 1 to form a reliable connection, ensuring the stability of the overall structure. Of course, the node plate 8 can also be fixedly connected to the dome support 7, having the same function, which will not be elaborated here. The annular rectangular tube 701 is set between adjacent dome supports 7 to enhance the lateral stiffness of the dome support 7 itself, further improving the overall stability of the connection between the dome and the silo top ring beam 1. The rubber pad... 702 has good elasticity and can absorb vibrations caused by equipment operation, wind loads, or earthquakes, reducing the transmission of vibrations to the top ring beam 1, lowering noise, and reducing fatigue damage. The top ring beam 1 may undergo slight deformation due to temperature changes, material shrinkage, or foundation settlement. The flexibility of the rubber pad 702 allows for a certain degree of displacement, such as horizontal sliding or slight rotation, avoiding stress transmission caused by rigid connections. For connections between different materials such as steel and concrete, the rubber pad 702 can alleviate temperature stress caused by differences in the linear expansion coefficients of the materials, which will not be elaborated further here. At the same time, the rubber pad 702 itself has a certain degree of sealing, which can fill the small gaps between the dome support 7, the annular rectangular tube 701, and the top ring beam 1, reducing the infiltration of rainwater and dust.

[0038] In this embodiment, the skin 4 covers the top and part of the outer side of the annular rectangular tube 701 and is welded and fixed. The skin 4 covers the top and part of the outer side of the annular rectangular tube 701 and is welded to form a continuous metal waterproof surface layer, which effectively covers the gap between the annular rectangular tube 701 and the skin 4, preventing rainwater from seeping into the interior of the compartment through the gap. At the same time, by adjusting the height of the annular rectangular tube 701 or the slope of the skin 4, the drainage slope design of the overall structural surface is realized to ensure that rainwater is quickly drained away, avoiding the risk of water accumulation, weight increase, and leakage.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A rigid frame skin dome for a circular shallow silo, characterized in that: It includes several dome frames, a central steel platform, and a skin. The top of the dome frames is fixedly connected to the central steel platform, and the bottom is installed on the top ring beam of the circular shallow silo. The skin is laid on the outer surface of the dome frames to form a closed structure.

2. The rigid frame skin dome for a circular shallow silo according to claim 1, characterized in that: The dome frames are arranged in an array along the circumference of the central steel platform, and the upper edge of the dome frames is arc-shaped.

3. The rigid frame skin dome for a circular shallow silo according to claim 2, characterized in that: The dome frame is arched and includes an upper chord beam, a lower chord beam, and web members. The upper chord beam is arc-shaped, and the bottom of the upper and lower chord beams are directly connected to the roof ring beam of the circular shallow silo.

4. The rigid frame skin dome for a circular shallow silo according to claim 3, characterized in that: The upper chord beam is fixed to the top of the silo top ring beam, and the lower chord beam is fixed to the inner side of the silo top ring beam.

5. The rigid frame skin dome for a circular shallow silo according to claim 1, characterized in that: It also includes inter-beam supports, which are located between adjacent dome frames.

6. The rigid frame skin dome for a circular shallow silo according to claim 1, characterized in that: The skin is arc-shaped, and its radial section conforms to the upper edge of the upper chord beam.

7. The rigid frame skin dome for a circular shallow silo according to claim 6, characterized in that: The skin is radially welded and fixed to the upper edge of the upper chord beam; The inner surface of the skin is provided with several stiffening ribs at equal intervals along the radial direction, and adjacent skins overlap the stiffening ribs in the weft direction and are welded and fixed.

8. The rigid frame skin dome for a circular shallow silo according to claim 2, characterized in that: The central steel platform is provided with a platform ring beam along its edge, and the upper flange of the platform ring beam is welded and fixed to the skin.

9. The rigid frame skin dome for a circular shallow silo according to claim 4, characterized in that: The top of the warehouse roof ring beam is provided with a dome support for fixing the upper chord beam. An annular rectangular tube is set between the dome supports. Rubber pads are arranged along the circumference of the warehouse roof ring beam at the bottom of the dome supports and the bottom of the annular rectangular tube. It also includes a node plate, through which the lower chord beam is fixedly connected to the inner side of the silo top ring beam.

10. The rigid frame skin dome for a circular shallow silo according to claim 9, characterized in that: The skin covers the top and part of the outer side of the annular rectangular tube and is welded and fixed.

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