Fabricated underground silo and underground silo cluster

Abstract

The invention relates to an assembly type underground silo and an underground silo cluster. The square silo comprises a square silo body formed by pouring breathable foam concrete, a plurality of built-in metal pipes are evenly distributed in the inner wall of the silo body in the circumferential direction of the silo body, the outer diameters of the built-in metal pipes are gradually increased from top to bottom, the diameters of inner holes of the built-in metal pipes are gradually increased from top to bottom, and a plurality of vent holes penetrating through the inside and the outside are evenly distributed in the built-in metal pipes. The lower end of the built-in metal pipe extends out of the bin body to be connected with an air source pipe, and a threaded hole is formed in the upper end of the built-in metal pipe to be connected with a bolt of a lifting appliance. Through the structure of the built-in metal pipe with the vent holes and the foam concrete, the purposes of conveniently ventilating, fumigating and filling nitrogen into materials are achieved, and through the structure that the diameters of the built-in metal pipe are gradually increased from top to bottom, the built-in metal pipe has the advantages of being high in bearing capacity, balanced in ventilation airflow and balanced in material bearing capacity. And through the arrangement of the conical structure of the built-in metal pipe and the threaded holes, the silo is convenient and rapid to hoist and high in bearing capacity.

Description

Technical Field

[0001] The invention relates to an assembled underground silo and an underground silo cluster. Background Art

[0002] Silos are important structures used to store bulk materials and are a common form of warehouse. When located underground, they are generally called underground silos. Based on their structural materials, they can be categorized as reinforced concrete silos, steel plate silos, and masonry silos. Based on their structural form, they can be divided into flat silos and shallow round silos. Shallow round silos are cylindrical granaries, such as the one disclosed in CN119392994A. They feature high grain layers, large single-bin capacity, and a relatively small footprint. However, they have numerous roof openings, poor insulation, and rapid surface grain aging. While flat silos are less efficient in land use than shallow round silos, they offer superior insulation and heat preservation, resulting in greater grain storage stability. Vertical silos are commonly used in the storage and processing sectors. They are taller and have a smaller inner diameter than shallow round silos, making them more flexible and less susceptible to temperature fluctuations. To further improve land utilization efficiency, warehouse operators have designed a new type of warehouse: the building warehouse. This type of warehouse fully utilizes upper floor space, features a high degree of mechanization, and offers relatively good insulation. However, it places high demands on the building structure and is relatively expensive to construct. Currently, the warehousing industry, driven by factors such as environmental protection and labor costs, is demanding a higher degree of mechanization when selecting grain warehouses. Shallow round silos and vertical silos are relatively mature warehouse types. Considering their cost-effectiveness, their single-unit storage capacity is high, making them suitable for terminal transportation operations and processing plants. However, for storage depots, the annual rotation requirement makes them less practical.

[0003] To address the shortcomings of the above-mentioned warehouse types, based on the flexibility of warehouse capacity and a high degree of mechanization, the patent with publication number CN114651611B discloses a low-temperature grain storage double-wall square silo. Its individual grain storage units have a small storage capacity, which is convenient for rotation, has greater adaptability, a large overall grain storage capacity, and high land utilization efficiency. However, the individual silos, which are single storage beam units, are generally prefabricated. When hoisting each silo into the foundation pit at the installation location, or hoisting a silo out for inspection, replacement, or relocation, there are problems such as inconvenient hoisting, cumbersome work, low efficiency, and poor alignment accuracy. At the same time, this structure is not convenient for ventilation, fumigation, and nitrogen filling operations on the grain and other materials stored therein. Summary of the Invention

[0004] The object of the present invention is to provide an assembled underground silo and an underground silo cluster, which realizes the purpose of ventilating, fumigating and nitrogen filling the materials through the structure of built-in metal tubes with vents and foam concrete. The structure of the built-in metal tubes with increasing diameter from top to bottom has the advantages of strong load-bearing capacity, balanced ventilation airflow and balanced material load-bearing capacity. The tapered structure of the built-in metal tubes and the arrangement of threaded holes make the lifting of the silo convenient and fast and have a strong load-bearing capacity.

[0005] The technical solution of the prefabricated underground silo of the present invention is as follows: the prefabricated underground silo includes a square silo, which includes a square silo body cast from breathable foam concrete, a plurality of built-in metal tubes evenly distributed along the circumference of the inner wall of the silo, the outer diameter of the built-in metal tube increases from top to bottom, the diameter of the inner hole of the built-in metal tube increases from top to bottom, a plurality of air vents are evenly distributed on the built-in metal tube running through the inside and outside, the lower end of the built-in metal tube extends from the silo body for connection to the air source pipe, and the upper end of the built-in metal tube is provided with a threaded hole for connection with the bolts of the sling.

[0006] On the basis of the above solution, a further improvement is made as follows: the upper end of the built-in metal tube where the threaded hole is provided is a polished rod section, and the vent hole is located in the area below the polished rod section.

[0007] Based on the above solution, a further improvement is made as follows: the outer surface of the polished rod section is a conical surface that is smaller at the top and larger at the bottom.

[0008] On the basis of the above scheme, further improvements are made as follows: a silo top series frame is provided on the top of the silo body, the inner and outer diameters of the silo top series frame are respectively consistent with the inner and outer diameters of the silo top, and the silo top series frame is provided with perforations corresponding to each built-in metal tube, the upper end of the built-in metal tube is installed in the perforation, and the silo top series frame is fixedly connected to each built-in metal tube.

[0009] On the basis of the above scheme, further improvements are made as follows: the silo roof series frame is welded by stainless steel bars, and the silo roof series frame is welded and fixed to the built-in metal pipe.

[0010] On the basis of the above solution, a further improvement is made as follows: a square funnel is provided at the lower part of the bin body.

[0011] Based on the above solution, a further improvement is made as follows: before pouring the silo body, the vent holes of the built-in metal tube are filled with paraffin.

[0012] The technical solution of the prefabricated underground silo cluster of the present invention is as follows: it includes a square foundation pit, with multiple square silo installation points evenly distributed in the foundation pit, and also includes prefabricated underground silos, the prefabricated underground silos including square silos, the square silos including a square silo body cast by breathable foam concrete, and multiple built-in metal tubes evenly distributed along the circumference of the inner wall of the silo body, the outer diameter of the built-in metal tube increases from top to bottom, the diameter of the inner hole of the built-in metal tube increases from top to bottom, and multiple air vents are evenly distributed on the built-in metal tubes running through the inside and outside, the lower end of the built-in metal tube extends from the silo body for connection to the air source pipe, and the upper end of the built-in metal tube is provided with a threaded hole for connection with the bolt of the sling, and each underground silo is selectively installed at a certain square silo installation point.

[0013] On the basis of the above solution, a further improvement is made as follows: the upper end of the built-in metal tube where the threaded hole is provided is a polished rod section, and the vent hole is located in the area below the polished rod section.

[0014] Based on the above solution, a further improvement is made as follows: the outer surface of the polished rod section is a conical surface that is smaller at the top and larger at the bottom.

[0015] On the basis of the above scheme, further improvements are made as follows: a silo top series frame is provided on the top of the silo body, the inner and outer diameters of the silo top series frame are respectively consistent with the inner and outer diameters of the silo top, and the silo top series frame is provided with perforations corresponding to each built-in metal tube, the upper end of the built-in metal tube is installed in the perforation, and the silo top series frame is fixedly connected to each built-in metal tube.

[0016] On the basis of the above scheme, further improvements are made as follows: the silo roof series frame is welded by stainless steel bars, and the silo roof series frame is welded and fixed to the built-in metal pipe.

[0017] On the basis of the above solution, a further improvement is made as follows: a square funnel is provided at the lower part of the bin body.

[0018] Based on the above solution, a further improvement is made as follows: before pouring the silo body, the vent holes of the built-in metal tube are filled with paraffin.

[0019] Based on the above scheme, further improvements are made as follows: a truss crane is installed on the foundation pit.

[0020] The beneficial effects of the present invention are as follows: When in use, the assembled underground silo and underground silo cluster of the present invention, because the silo body is cast from breathable foam concrete and is uniformly distributed with internal metal tubes with vents, an operating airflow can be introduced directly into the bottom of the internal metal tubes through an air source pipe. The operating airflow can enter the silo body through the vents and the gaps in the foam concrete of the silo body to perform operations such as fumigation, ventilation, and nitrogen filling of the grain and other materials therein. Moreover, because the silo body is square and the underground silos are arranged to fit closely together, the operating airflow can also penetrate into adjacent silos, relying on mutual penetration to more effectively achieve related functions. In addition, since the inner diameter of the built-in metal tube increases from top to bottom, when air is introduced into the built-in metal tube through the air source tube connected to the lower end of the built-in metal tube for ventilation, fumigation or nitrogen filling, the air pressure will decrease from bottom to top along the inside of the built-in metal tube, which will cause the effect of the air flow to be uneven. The built-in metal tube of the present application uses the characteristic that the smaller the inner diameter, the greater the gas pressure to compensate for the air pressure, so that the air pressure at various places in the built-in metal tube is basically the same, ensuring the uniformity of ventilation, fumigation or nitrogen filling. Secondly, since the outer diameter of the built-in metal tube increases from top to bottom, when the built-in metal tube is vertically lifted by threaded connection, its conical surface can be used to achieve vertical bearing of the warehouse body, that is, the conical surface can have a part of the vertical bearing capacity, thereby improving the overall lifting strength. When lifting the built-in metal tube, the force can be transmitted to the entire warehouse body, and the force is more reasonable. Moreover, the lower the square silo is, the greater the pressure on its inner wall from the grain and other materials in the silo is, and the thicker the built-in metal tube is, the larger the contact area and the higher the bending strength of the thicker metal tube is, which means it has a higher load-bearing capacity. Its gradually increasing load-bearing capacity from top to bottom is just adapted to the increasing material pressure from top to bottom of the square silo. Furthermore, since the upper end of the built-in metal tube that is conical and passes through the silo body is provided with an internal thread that can be directly connected to the bolts of the sling for load-bearing, this structure uses the built-in metal tube as the load-bearing skeleton of the silo body, so that the entire silo body can bear the load, rather than just the small area at the top of the silo body, so it has a higher load-bearing performance. The provision of threaded holes on the built-in metal tube also facilitates docking with the lifting device, making it quick and efficient to lift. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A longitudinal cross-sectional view of an embodiment of the assembled underground silo of the present invention; Figure 2 for Figure 1 A partial enlarged view of point A in the middle; Figure 3 This is a top view of the square silo; Figure 4 It is a three-dimensional diagram of the built-in metal tube; Figure 5 A top view of an embodiment of the prefabricated underground silo cluster of the present invention (top view of the foundation pit); Figure 6 This is a top view of the truss crane fixed on the foundation pit; Figure 7 for Figure 6 A partial enlarged view of point B in the middle; Figure 8 This is a schematic diagram of the state when the truck crane carries the square silo through the square hole; Figure 9 for Figure 8 A partial enlarged view of point C in the middle; Figure 10 for Figure 8 A partial enlarged view of point D in the middle; Figure 11 This is a schematic diagram of the state before the square frame spreader and the square silo are connected; Figure 12 This is a schematic diagram of the state after the frame spreader is connected to the square silo and the truck crane is separated from the square silo; In the figure: 1-square silo, 11-silo body, 12-built-in metal pipe, 121-threaded hole, 122-vent, 13-silo top serial frame, 14-square funnel, 15-air source pipe, 16-valve, 2-foundation pit, 21-square silo installation point, 3-truss crane, 31-fixed beam, 311-track, 312-first traveling mechanism, 32-movable beam, 33-square frame hoist, 331-square through hole, 332-hydraulic cylinder, 333-hanging plate, 3331-bolt hole, 334-bolt, 4-lifting rope of automobile crane, 40-lifting arm of automobile crane, 41-eye bolt. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is 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 intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0024] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0025] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0026] An embodiment of an assembled underground silo of the present invention: as shown in the figure, the assembled underground silo includes a square silo, which includes a square silo body cast from breathable foam concrete, and a plurality of built-in metal tubes are evenly distributed along the circumference of the inner wall of the silo, the outer diameter of the built-in metal tube increases from top to bottom, the diameter of the inner hole of the built-in metal tube increases from top to bottom, and a plurality of air vents are evenly distributed on the built-in metal tube running through the inside and outside, the lower end of the built-in metal tube extends from the silo body for connection with the air source pipe, and the upper end of the built-in metal tube is provided with a threaded hole for connection with the bolts of the hanger.

[0027] An embodiment of an assembled underground silo cluster of the present invention: Figure 5 、 8 As shown, it includes a square foundation pit, with multiple square silo installation points evenly distributed in the foundation pit, and also includes an assembled underground silo. The assembled underground silo includes a square silo, and the square silo includes a square silo body cast by breathable foam concrete. A plurality of built-in metal tubes are evenly distributed along the circumference of the inner wall of the silo body, the outer diameter of the built-in metal tube increases from top to bottom, and the diameter of the inner hole of the built-in metal tube increases from top to bottom. A plurality of air vents are evenly distributed on the built-in metal tube, and the lower end of the built-in metal tube extends from the silo body for connection with the air source pipe. The upper end of the built-in metal tube is provided with a threaded hole for connection with the bolts of the sling. Each underground silo is selectively installed at a certain square silo installation point.

[0028] like Figure 1-4As shown, the structure of the square silo 1 as the object of lifting is as follows: the square silo 1 is a rectangular square silo structure as a whole, with a rectangular cross-section and a square funnel 14 at the bottom. The silo body 11 is made of cement-based foam concrete poured on evenly arranged steel bars and built-in metal pipes 12. It is prefabricated in the factory and transported to the installation site for installation. Foam concrete is light and breathable, which is not only convenient for lifting, but also allows the built-in metal pipes 12 to ventilate, fumigate or nitrogen-fill the materials in the silo. The silo body 11 is a structural reinforcement of foam concrete with steel bars and built-in metal pipes 12, which makes the silo body 11 have a good load-bearing capacity and meets the lifting requirements. In addition, the square silos 1 are finally installed side by side and can bear each other's weight. Silo 11 is a deep rectangular structure with a height-to-width ratio greater than 3. A characteristic of a deep rectangular silo is that material loads are primarily circumferential, controlled by horizontal reinforcement in the silo walls. This allows a single silo to meet load requirements (similar to a container, it can also be hoisted after being filled with grain and other materials). Unlike other concrete structures, which require the structure and foundation to be fully assembled before functioning, the silo's square shape facilitates flexible and versatile planar assembly, and the combined structures can support loads. (Circular and other polygonal structures, on the other hand, have more demanding assembly requirements.) Silo 11 utilizes a cement-based foam concrete structure with reinforced steel and internal metal tubes 12 to ensure sufficient strength to withstand the loads of bulk materials during use and the lifting loads during construction. Leveraging the foam concrete's high porosity, it can be combined with the internal metal tubes 12 to achieve functions such as ventilation, fumigation, and nitrogen filling. The internal metal tubes 12 are made of stainless steel and are porous throughout. Combined with the foam concrete of silo 11, they facilitate ventilation, fumigation, and nitrogen filling. Threaded holes 121 are left at the upper and lower ends of the built-in metal tube 12. The lower threaded hole 121 is mainly connected to the functional pipeline, and the upper threaded hole 121 is mainly used to facilitate construction hoisting or maintenance hoisting.

[0029] The built-in metal tube 12 is a conical tubular structure that is smaller at the top and larger at the bottom. Threaded holes 121 are correspondingly provided at the upper and lower ends, and the vent holes 122 are no longer provided on the outer periphery of the two sections where the threaded holes 121 are provided, that is, the vent holes 122 are only distributed in the area between the upper and lower sections of the built-in metal tube 12, so as not to affect the connection strength of the thread. Among them, the built-in metal tube 12 has the following functions: First, due to the use of a conical structure that is smaller at the top and larger at the bottom, when the built-in metal tube 12 is vertically suspended by threaded connection, its conical surface can be used to achieve vertical bearing of the warehouse body 11, that is, the conical surface can have a part of the vertical bearing capacity, thereby improving the overall lifting strength. When the built-in metal tube 12 is suspended, the force can be transmitted to the entire warehouse body 11, and the force is more reasonable; second, when air flow is introduced into the built-in metal tube 12 through the air source tube 15 connected to the lower end of the built-in metal tube 12 for ventilation, fumigation or nitrogen filling, the air pressure will decrease from bottom to top along the inside of the built-in metal tube 12, which will cause the air flow to be affected. The sound effect is uneven, and the built-in metal tube 12 of the present application is a conical structure. The characteristic that the smaller the inner diameter of the built-in metal tube 12, the greater the gas pressure can be used to compensate for the air pressure, so that the air pressure in the upper and lower parts of the built-in metal tube 12 is basically the same, thereby ensuring the uniformity of ventilation, fumigation or nitrogen filling; thirdly, since the lower the square silo 1 is, the greater the pressure on its inner wall from the grain and other materials in the silo is, and the thicker the built-in metal tube 12 is, the larger the contact area and the higher the bending strength of the thick metal tube, that is, it has a higher bearing capacity, and its gradually increasing bearing capacity from top to bottom is just adapted to the increasing material pressure of the square silo 1 from top to bottom.

[0030] When the square silo 1 is prefabricated in the factory, when pouring foam concrete outside the internal metal tube 12, in order to prevent the concrete from flowing into the internal metal tube 12 from the vent hole 122 of the internal metal tube 12 and causing the vent hole 122 to be blocked, before pouring, the vent hole 122 of the internal metal tube 12 is filled with paraffin or other solid fillers that are easily melted when heated. After the pouring is completed, the paraffin is heated to flow out to prevent the concrete from clogging the internal metal tube 12 during the pouring process.

[0031] The square funnel 14 is a bulk material discharge funnel, which can be made of concrete or steel structure. It can be designed as a prefabricated integral structure with the warehouse body 11, or a pre-assembled split structure, which can be disassembled and assembled at any time. For example, the connection with the square funnel 14 is achieved through the threaded hole 121 at the lower end of the built-in metal tube 12, and the gap is filled with sealant to achieve a sealed connection. The air source pipe 15 is a common ventilation duct, which can be made of metal or plastic. It is connected to the lower end of each built-in metal tube 12 by threading or other structures. The connection between the two is preferably a quick-plug connector. After installation, it is quickly connected and quickly disassembled during maintenance. The other end of the air source pipe 15 can be connected to a source generating device, such as a gas cylinder for storing nitrogen.

[0032] like Figure 5 、 8 As shown, the prefabricated square silo 1 needs to be hoisted in a pre-built foundation pit 2. The foundation pit 2 is a square underground storage pit with multiple square silo installation points 21 evenly arranged therein. Each square silo installation point 21 can be installed with a Figure 1 The square silo 1 shown, that is, each square silo 1 is a storage unit, and the storage units can be densely arranged or spaced apart in the foundation pit 2, and the arrangement method is flexible and changeable.

[0033] like Figure 1 、 2 As shown, the top of each square silo 1 is provided with a silo roof series frame 13 that is consistent with the inner and outer dimensions of the silo body 11. The silo roof series frame 13 is welded from metal beams, and is provided with perforations corresponding to the internal metal tubes 12 of the square silo 1. The diameter of the perforations is consistent with the outer diameter of the corresponding internal metal tubes 12. The upper ends of the internal metal tubes 12 pass through the perforations, and the outer surfaces of the internal metal tubes 12 and the perforations of the silo roof series frame 13 can be welded and fixed, so that each internal metal tube 12 is connected to the silo roof series frame 13 as a whole, so as to drive each internal metal tube 12 to bear the load together. When some internal metal tubes 12 are hoisted and subjected to force, the force can be transmitted to the silo roof series frame 13 through the connection with the silo roof series frame 13, and the silo roof series frame 13 then transmits the force to the remaining internal metal tubes 12, and each internal metal tube 12 itself can bear the weight of the silo body 11, so that an overall frame-type integrated load-bearing structure is realized, which has stronger integrity and stronger load-bearing capacity. In other embodiments, each perforation of the silo top serial frame 13 can be designed as a tapered hole structure with a smaller top and a larger bottom, and the taper is consistent with the taper of the outer surface of the corresponding built-in metal tube 12. The two can have better load-bearing capacity by matching the tapered surfaces.

[0034] In order to match the special structure of the square silo 1 and meet the requirements of fast, efficient and accurate lifting, the following lifting system is adopted: Figure 6 、 8 As shown, the truss crane 3 includes a pair of fixed beams 31 arranged in parallel in the longitudinal direction and a pair of movable beams 32 arranged in parallel in the transverse direction. The two fixed beams 31 are symmetrically erected on the left and right sides of the pit edge of the foundation pit 2, and a corresponding bearing structure for distributing the pressure is provided. The two ends of the movable beam 32 are erected on the two fixed beams 31 and are driven by the first walking mechanism 312 to move along the length direction of the fixed beams 31, as shown in FIG. Figure 10 As shown, the first traveling mechanism 312 includes two parallel tracks 311 disposed on a fixed beam 31, wheels rolling on the parallel tracks 311, and a drive mechanism, a transmission mechanism, a support frame, and other structures. The structure of the first traveling mechanism 312 is conventional and will not be described in detail here. Similarly, the subsequent second traveling mechanism also adopts a structure substantially similar to the first traveling mechanism and will not be described in detail here.

[0035] like Figure 6-8 As shown, a frame sling 33 is mounted on two movable beams 32, with its front and rear sides respectively mounted on the two movable beams 32. The frame sling 33 is driven by a second traveling mechanism to move along the length of the movable beams 32. A square through-hole 331 is defined in the center of the frame sling 33 for the vertical passage of the silo 1. The through-hole 331 is slightly larger than the outer diameter of the silo 1, ensuring smooth passage of the silo 1. At least two telescopic units are evenly distributed along the circumference of the lower portion of the frame sling 33. These units include a vertically mounted hydraulic cylinder 332 and a hanging plate 333 rotatably mounted at the lower end of the hydraulic cylinder 332. The outer end of the hanging plate 333 is provided with a bolt hole 3331 for connection to the top of the silo 1 via bolts 334. The hanging plate 333 is made of thick steel plate and is required to have a high load-bearing capacity.

[0036] The truck crane is set outside the foundation pit 2, and is mainly used to lift the square silo 1 into or out of the foundation pit 2. It is necessary to realize the handover and transfer of the square silo 1 between the air and the truss crane 3. Its structure is the existing technology, mainly including a boom and a lifting rope. The lower part of the lifting rope is divided into at least two branch ropes. The lower end of the branch rope is connected with a lifting eye bolt 41 for threaded connection with the top of the square silo 1.

[0037] The boom-type aerial work platform is mainly used to transport operators to the vicinity of the square frame hoist 33 to facilitate operations such as rotating the hanging plate 333, tightening or loosening the bolts 334 and the eye bolts 41 when the square silo 1 is transferred between the truss hoist and the truck crane.

[0038] The specific lifting method is as follows: S1. Hoisting of square silo 1 into foundation pit 2: S11. Use a truck crane to lift the square silo 1 to be installed outside the foundation pit 2. Figure 8 、 9 As shown, the lower part of the lifting rope of the truck crane is divided into at least two branch ropes, and the lower end of each branch rope is connected to the eye bolt 41. The eye bolts 41 are evenly screwed into the threaded holes 121 at the upper end of the built-in metal tube 12 of the square silo 1, and the square silo 1 is lifted to the top of the square frame lifting device 33 of the truss crane 3; S12, adjust the position of the square silo 1 so that the square silo 1 corresponds to the square through-hole 331 of the square frame sling 33, drop the square silo 1, and make the square silo 1 pass through the square through-hole 331 from top to bottom until the square silo 1 is completely located below the square frame sling 33. Figure 11 As shown; S13, such as Figure 11 、 12As shown, the telescopic units at the lower part of the frame hoist 33 are started. When the hanging plate 333 at the lower end of the hydraulic cylinder 332 moves down to the upper surface close to the square silo 1, the hanging plate 333 is rotated until the bolt hole 3331 on the hanging plate 333 is coaxial with a threaded hole 121 on the top of the square silo 1. When the hanging plate 333 is in contact with the upper surface of the square silo 1, the hydraulic cylinder 332 is stopped. The bolt 334 passes through the bolt hole 3331 of the hanging plate 333 from top to bottom and is screwed into the threaded hole 121 on the top of the square silo 1. The hydraulic cylinder 332 drives the hanging plate 333 to move up a short distance, and the eye bolt 41 of the car crane is unscrewed from the threaded hole 121 on the top of the square silo 1. The car crane is started to remove the lifting rope and the eye bolt 41, completing the transfer and handover of the square silo 1 from the car crane to the truss crane 3. S14, start the truss crane 3, move the square silo 1 to the set position in the foundation pit 2, start each telescopic unit to synchronously lower the square silo 1, install and fix the square silo 1 after it is in place, and after the installation is completed, unscrew the bolts 334 on each hanging plate 333 to reset each telescopic unit, reset the truss crane 3, and complete the process of lifting the square silo 1.

[0039] S2. Hoisting of square silo 1 out of foundation pit 2: S21, start the truss crane 3, move the frame hoist 33 to the top of the silo 1 to be lifted out, lower each telescopic unit until the lower surface of its hanging plate 333 is close to the upper surface of the silo 1, rotate the hanging plate 333 of each telescopic unit so that the bolt hole 3331 on the hanging plate 333 is coaxial with a threaded hole 121 on the top of the silo 1, lower the telescopic unit until the lower surface of the hanging plate 333 is in contact with the upper surface of the silo 1, pass the bolt 334 from top to bottom through the bolt hole 3331 of the hanging plate 333 and screw it into the threaded hole 121 on the top of the silo 1, remove the connection between the silo 1 and the foundation pit 2, and then drive each telescopic unit upward synchronously to lift the silo 1; S22. Pass the lifting rope of the truck crane through the square through-hole 331 of the square frame sling 33 from top to bottom until the eyebolt 41 at the lower part of the lifting rope can be smoothly screwed into the threaded hole 121 at the top of the square silo 1. Evenly screw each eyebolt 41 into the corresponding threaded hole 121. S23, start the mobile crane, tighten the lifting rope, put the lifting rope in a stressed state, and stop the lifting rope from moving upward; S24, unscrew the bolts 334 between the hanging plate 333 and the square silo 1 to reset each telescopic unit; S25. Start the truck crane to make the lifting rope drive the square silo 1 to continue to move upward and pass through the square through-hole 331 of the square frame lifting device 33 from bottom to top, and then lift the square silo 1 out of the foundation pit 2.

[0040] like Figure 7As shown, in this embodiment, two threaded holes 121 are symmetrically distributed on the four sides of the top of the square silo 1, namely the front, rear, left, and right sides. The truck crane is connected to the threaded holes 121 on the front and rear sides, and the truss crane 3 is connected to the threaded holes 121 on the left and right sides. Threaded holes 121 are evenly distributed on the four sides of the top of the square silo 1, namely the front, rear, left, and right sides. Each of the left and right sides includes two symmetrically arranged threaded holes 121. The truck crane and the truss crane 3 are both connected to the threaded holes 121 on the left and right sides. One of the two threaded holes 121 provided on the left and right sides is connected to the truck crane, and the other is connected to the truss crane 3.

[0041] like Figure 5 As shown, each square silo 1 is hoisted on the corresponding square silo installation point 21 in the foundation pit 2, among which the square silo 1 in the outermost circle can be used as the outer wall of this lattice storage group. At this time, the side of this circle of square silos 1 on the side in contact with the foundation pit 2 needs to be treated as follows: first, waterproofing, a waterproof coating can be set, such as LEAC acrylic polymer cement waterproof coating, and the joints between adjacent square silos 1 also need to be provided with waterproof filler and then coated with waterproof coating. In addition, the square silos 1 in the outermost circle also need to be treated with metal structure anti-corrosion, concrete structure anti-corrosion, etc., and a water guide trough is also required at the bottom, as well as freeze-thaw protection and chemical corrosion protection.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. Prefabricated underground silo, characterized by: It includes a square silo, which includes a square silo body cast from breathable foam concrete. A plurality of built-in metal tubes are evenly distributed along the circumference of the inner wall of the silo. The outer diameter of the built-in metal tube increases from top to bottom, and the diameter of the inner hole of the built-in metal tube increases from top to bottom. A plurality of air vents are evenly distributed on the built-in metal tube, which passes through the inside and outside. The lower end of the built-in metal tube extends from the silo body for connection with the air source pipe. The upper end of the built-in metal tube is provided with a threaded hole for connection with the bolts of the sling.

2. The assembled underground silo according to claim 1, characterized in that: The upper end of the built-in metal tube is provided with a threaded hole at a section which is a polished rod section, and the vent hole is located in a region below the polished rod section.

3. The assembled underground silo according to claim 2, characterized in that: The outer surface of the polished rod section is a conical surface that is smaller at the top and larger at the bottom.

4. The assembled underground silo according to claim 1, characterized in that: A silo top series frame is provided on the top of the silo body. The inner and outer diameters of the silo top series frame are respectively consistent with the inner and outer diameters of the silo top. The silo top series frame is provided with perforations corresponding to each built-in metal tube. The upper end of the built-in metal tube is installed in the perforation, and the silo top series frame is fixedly connected to each built-in metal tube.

5. The assembled underground silo according to claim 4, characterized in that: The silo roof serial frame is welded by stainless steel bars, and the silo roof serial frame is welded and fixed to the built-in metal pipe.

6. The assembled underground silo according to claim 1, characterized in that: A square funnel is provided at the lower part of the bin body.

7. The assembled underground silo according to claim 1, characterized in that: Before pouring the silo body, the vent holes in the built-in metal tube are filled with paraffin.

8. Prefabricated underground silo cluster, characterized by: The invention comprises a square foundation pit, wherein a plurality of square silo installation points are evenly distributed in the foundation pit, and further comprises a plurality of assembled underground silos as described in any one of claims 1 to 7, wherein each underground silo is selectively installed at a certain square silo installation point.

9. The assembled underground silo cluster according to claim 8, characterized in that: A truss crane is installed on the foundation pit.

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