A centrally supported ventilated silo

Abstract

The utility model relates to a kind of central bearing ventilation shallow silos. Including base platform;Warehouse wall is cylindrical, is installed on base platform;Warehouse top is conical structure, top central is equipped with round hole;Center cylinder is coaxially arranged with warehouse wall, lower end is installed on base platform, upper end is connected at the round hole of warehouse top, the inner chamber of center cylinder is communicated with atmosphere by round hole, the cylinder wall of center cylinder is evenly distributed with multiple air passages in circumferential direction, the axis of air passage is parallel with the axis of center cylinder, multiple gas outlets are spaced apart along axial direction on air passage, and gas outlet leads to the area between center cylinder and warehouse wall. By setting center cylinder in shallow silo and connecting with warehouse top and warehouse bottom to form integrated structure, the carrying capacity and the anti-seismic capacity of shallow silo are significantly improved, and the airflow passage is evenly distributed in center cylinder, which can facilitate transverse ventilation or fumigation from the middle of shallow silo, significantly improve the uniformity of fluid distribution, thereby improve the ventilation efficiency.

Description

Technical Field

[0001] This utility model relates to a centrally supported, ventilated shallow circular chamber. Background Technology

[0002] Shallow circular silos, as the mainstream type of modern grain depots, use their cylindrical structure to resist the lateral pressure of the grain pile through the self-weight of the silo walls and the mechanical properties of reinforced concrete. However, traditional shallow circular silos have the following technical bottlenecks: 1. Insufficient load-bearing capacity: Traditional shallow circular silos lack a central support structure, and the silo walls must independently withstand the lateral pressure of grain piles 20-40 meters high, resulting in a wall thickness of 250-300 mm, large material consumption, and complex construction. 2. Low ventilation and fumigation efficiency: When the grain pile thickness exceeds 20 meters, conventional circulating fumigation systems must overcome radial ventilation resistance as high as 27%, leading to uneven distribution of fumigation gas and limited insecticidal effect. Traditional ventilation systems rely on side wall ducts, resulting in low airflow organization efficiency, and cooling in summer takes more than 72 hours. 3. Structural stability defects: Tall silos are prone to stress concentration under strong winds or seismic loads. Existing technologies lack a coordinated stress-bearing design at the connection nodes between the silo top and bottom, posing a risk of cracking. Utility Model Content

[0003] The purpose of this utility model is to provide a centrally supported ventilated shallow circular chamber. By setting a central cylinder in the middle of the shallow circular chamber and connecting it with the top and bottom of the chamber to form an integrated structure, the load-bearing capacity and seismic resistance of the shallow circular chamber are significantly improved. Moreover, the airflow channels are evenly distributed in the central cylinder, which facilitates lateral ventilation or fumigation from the middle of the shallow circular chamber, significantly improving the uniformity of fluid distribution and thus improving ventilation efficiency.

[0004] The technical solution of this utility model is as follows: A centrally supported, ventilated shallow circular chamber includes: Basic platform; The silo walls are cylindrical and are installed on the foundation platform; The top of the silo is a conical structure with a round hole in the center. The central cylinder is coaxially mounted with the silo wall. Its lower end is installed on the foundation platform and its upper end is connected to a circular hole on the top of the silo. The inner cavity of the central cylinder is connected to the atmosphere through the circular hole. Multiple ventilation channels are evenly distributed along the circumference inside the central cylinder wall. The axis of the ventilation channels is parallel to the axis of the central cylinder. Multiple air outlets are spaced along the axial direction on the ventilation channels, and the air outlets lead to the area between the central cylinder and the silo wall.

[0005] The beneficial effects of this technical solution are as follows: Compared with the existing technology, this technical solution sets a central cylinder at the center of the shallow circular silo wall, forming an inner and outer double-layer support structure with the silo wall, and forming an integral load-bearing structure after connecting with the silo top and foundation platform. Among them, the central cylinder, as the core load-bearing component of the silo body, transforms the circumferential tension of the traditional silo wall into axial pressure, which can significantly reduce the wall thickness and save concrete usage. Through the rigid connection between the central cylinder and the silo top / bottom, a spatial force system is formed, which can resist lateral pressure and has high seismic performance. The setting of the circular hole in the silo top and its cooperation with the central pipe, along with the setting of ventilation channels and air outlets on the central pipe, can realize the lateral air intake of the grain silo, forming a central air intake-ring air outlet airflow pattern, which improves the uniformity of ventilation of the grain pile and the cooling efficiency. Moreover, the setting of the central cylinder facilitates construction guidance.

[0006] Based on the above scheme, the following improvements are made: the silo walls, silo roof, and central cylinder are all prefabricated assembly structures.

[0007] Based on the above scheme, the following improvements are made: when the upper and lower adjacent cylinder walls of the central cylinder are spliced, an elastic sealing ring is provided at the corresponding ventilation channel to achieve a sealed connection of the ventilation channels of the two adjacent cylinder walls.

[0008] Based on the above scheme, the following improvements are made: the ventilation channel is formed by the inner hole of the ventilation pipe embedded in the cylinder wall of the central cylinder.

[0009] Based on the above scheme, the following improvements are made: the air outlet is formed by the inner hole of the air outlet pipe embedded in the cylinder wall of the central cylinder, and the air outlet pipe is vertically connected to the ventilation pipe. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the state of a centrally supported, ventilated shallow circular silo after the foundation platform has been poured, according to this utility model. Figure 2 This demonstrates the positional relationship between the final layer of the warehouse wall and the base platform; Figure 3 A schematic diagram showing the positional relationship between the silo wall conveying mechanism and the corresponding hydraulic lifting mechanism of the silo wall; Figure 4 A cross-sectional view of the silo wall panel being conveyed by the silo wall conveyor mechanism; Figure 5 This is a 3D view of the hydraulic lifting mechanism (the structure of the lateral telescopic mechanism of the upper plate is not shown in the figure). Figure 6 for Figure 5 Side view of the lateral telescopic mechanism of the corresponding upper plate; Figure 7 for Figure 6 Sectional view at point AA; Figure 8 This is a three-dimensional diagram of a support frame; Figure 9 This is a 3D view of the construction after reaching the second layer of the warehouse wall; Figure 10 for Figure 9 A three-dimensional view after longitudinal sectioning; Figure 11 This is the front view of the warehouse top; Figure 12 This is a cross-sectional view of a ring of prestressed tendons along the warehouse wall; Figure 13 for Figure 12 A magnified view of a section at point B in the middle; Figure 14 A three-dimensional view of the junction between the silo wall and the prestressed tendons; Figure 15 This is a cross-sectional view of the clearance groove corresponding to the lower support plate when the last layer of warehouse wall connects with the penultimate layer of warehouse wall; Figure 16 A three-dimensional view of the shallow circular silo after construction is completed; Figure 17 A schematic diagram showing the distribution of each hydraulic lifting mechanism and its connection to the hydraulic system; Figure 18 Figure 17 A magnified view of a section at point C; Figure 19 This is a longitudinal section diagram of the assembled shallow circular hopper; Figure 20 for Figure 19 A magnified view of a section at point D; In the diagram: 1-Basic platform, 11-Installation ring groove, 2-Hydraulic jacking mechanism corresponding to the silo wall, 21-Lifting rod, 22-Lifting frame, 221-Upper insert plate, 2211-First slider, 2212-Second slider, 222-Lower support plate, 223-Support connecting rod, 224-Transverse telescopic mechanism, 2241-Hydraulic telescopic rod, 2242-Fixed guide plate, 2243-First slide groove, 2244-Second slide groove, 225-Connecting support seat, 23-Hydraulic oil circuit for silo wall lifting, 3-Support frame, 31-Connecting screw assembly, 40-Silo top, 401-Upper ring beam, 402-Fan-shaped plate, 403-Lower ring beam, 404-Reserved tongue and groove, 41-First layer of silo wall, 411-Insertion hole, 412-Bolt hand hole, 413-Silo Wall unit, 4131-grouting port, 414-support column, 42-second layer wall, 43-third layer wall, 44-second to last layer wall, 45-last layer wall, 451-avoidance groove, 5-prestressed tendon, 51-prestressed anchor, 6-wall conveying mechanism, 61-support ring plate, 62-conveying ring disc, 621-roller mounting groove, 63-roller, 64-U-shaped bearing base, 7-center cylinder, 70-hydraulic jacking mechanism corresponding to the center cylinder, 701-hydraulic oil circuit of the center cylinder, 71-first layer wall, 72-second layer wall, 73-third layer wall, 74-venting channel, 75-air outlet, 8-hydraulic system, 81-oil tank, 82-hydraulic pump, 83-two-position four-way solenoid directional valve, 84-hydraulic oil distributor. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0012] 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0013] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0014] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0015] A specific embodiment of the centrally supported ventilated shallow circular chamber of this utility model is as follows: Figures 19-20 The image shown is a longitudinal sectional view of the assembled shallow circular hopper. Figure 1-18 This section describes how the centrally supported, ventilated shallow circular chamber is constructed.

[0016] The central support ventilation shallow circular silo includes a foundation platform 1, silo walls, silo top 40, and central cylinder 7.

[0017] The foundation platform 1 is a cylindrical, cast-in-place concrete structure. The silo wall is cylindrical and installed on the foundation platform 1. The silo roof 40 is a conical structure with a central hole at the top. The central cylinder 7 is coaxially mounted with the silo wall, its lower end installed on the foundation platform 1 and its upper end connected to the central hole in the silo roof 40. The inner cavity of the central cylinder 7 communicates with the atmosphere through the central hole. Multiple ventilation channels 74 are evenly distributed circumferentially within the inner wall of the central cylinder 7. The axis of the ventilation channels 74 is parallel to the axis of the central cylinder 7. Multiple air outlets 75 are spaced axially along the ventilation channels 74, leading to the area between the central cylinder 7 and the silo wall. The silo wall, silo roof 40, and central cylinder 7 are all prefabricated assembly structures. When adjacent upper and lower cylinder walls of the central cylinder 7 are joined, elastic sealing rings are provided at the corresponding ventilation channels 74 to achieve a sealed connection of the ventilation channels 74 between adjacent cylinder walls. The ventilation channel 74 is formed by the inner hole of a ventilation pipe embedded in the inner wall of the central cylinder 7. The air outlet 75 is formed by the inner hole of the air outlet pipe embedded in the cylinder wall of the central cylinder 7, and the air outlet pipe is vertically connected to the ventilation pipe.

[0018] Compared to existing technologies, this technical solution sets a central cylinder 7 at the center of the shallow circular silo wall, forming an inner and outer double-layer support structure with the silo wall. After docking with the silo top 40 and the foundation platform 1, it forms an integral load-bearing structure. The central cylinder 7, as the core load-bearing component of the silo body, transforms the circumferential tension of the traditional silo wall into axial pressure, which can significantly reduce the wall thickness and save concrete usage. Through the rigid connection between the central cylinder 7 and the silo top 40 / bottom, a spatial force system is formed, which can resist lateral pressure and has high seismic performance. The circular hole in the silo top 40 and its cooperation with the central pipe, along with the ventilation channel 74 and air outlet 75 on the central pipe, can realize lateral air intake of the grain silo, forming a central air intake-ring air outlet airflow pattern, which improves the uniformity of ventilation of the grain pile and the cooling efficiency. Moreover, the setting of the central cylinder 7 facilitates construction guidance.

[0019] like Figure 3 , 5 As shown in Figures 6, 7, 8, 10, 17, and 18, the centrally supported ventilated shallow circular silo includes a silo wall lifting system, a central cylinder lifting system, and a hydraulic system.

[0020] The silo wall lifting system includes multiple first hydraulic lifting mechanisms (i.e., hydraulic lifting mechanisms 2 corresponding to the silo wall) and one-to-one corresponding first support frames 3. The multiple first hydraulic lifting mechanisms are evenly distributed along the circumference of the silo wall in the area inside the silo wall. The first support frames 3 are used to support the lower part of the silo wall. The first support frames 3 are spliced ​​together to form a circular structure covering a layer of silo wall.

[0021] The central tube lifting system includes multiple second hydraulic lifting mechanisms (i.e., hydraulic lifting mechanisms 70 corresponding to the central tube) and one-to-one corresponding second support frames 3. The multiple second hydraulic lifting mechanisms are evenly distributed along the circumference of the central tube wall in the area inside the central tube wall. The second support frames 3 are used to support the lower part of the central tube wall. The various second support frames 3 are spliced ​​together to form a circular structure covering one layer of the central tube wall.

[0022] The hydraulic system 8 is used to provide hydraulic power to the silo wall lifting system and the center cylinder lifting system to control the synchronous lifting of each first and second hydraulic lifting mechanism. It includes an oil tank 81, a hydraulic pump 82, a solenoid directional valve and a hydraulic oil distributor 84. The solenoid directional valve controls the lifting and lowering switching of each first and second hydraulic lifting mechanism, and the hydraulic oil distributor 84 controls the proportion of hydraulic oil supplied to the silo wall lifting system and the center cylinder lifting system.

[0023] Both the first and second hydraulic lifting mechanisms include a lifting rod 21 that can move up and down and a lifting frame 22 fixed relative to the upper end of the lifting rod 21. The lifting frame 22 includes an upper insert plate 221 and a lower support plate 222 arranged vertically. The upper insert plate 221 is used to insert into the insertion hole 411 of the cylinder wall or silo wall of the central cylinder. The lower support plate 222 is used to support the corresponding support frame 3. The upper insert plate 221 is driven by a lateral telescopic mechanism 224 to achieve lateral telescopic movement. The lateral telescopic mechanism 224 includes a fixed guide plate 2242 and a hydraulic telescopic rod 2241. The fixed guide plate 2242 is fixed relative to the lower support plate 222. The upper insert plate 221 and the lateral telescopic mechanism 224 slide along the lateral guide through a sliding groove and a slider. The hydraulic telescopic rod 2241 drives the upper insert plate 221 to move relative to the fixed guide plate 2242.

[0024] The fixed guide plate 2242 is symmetrically provided with a first slide groove 2243 and a second slide groove 2244. The upper insert plate 221 is correspondingly provided with a first slider 2211 and a second slider 2212. The first slide groove 2243 and the first slider 2211 are in a guiding sliding fit, and the second slide groove 2244 and the second slider 2212 are in a guiding sliding fit. The multi-stage matching guide structure of the slide groove and the slider can improve the overall load-bearing capacity and guiding accuracy. The first slider 2211 and the second slider 2212 include at least two pieces, which are respectively arranged at intervals along the length direction of the first slide groove 2243. This further improves the load-bearing capacity. The lateral telescopic mechanism 224 shares the hydraulic system 8 with the silo wall lifting system and the center cylinder lifting system. The electromagnetic reversing valve includes at least four valve positions, of which two valve positions control the hydraulic oil to flow simultaneously to the silo wall lifting system and the center cylinder lifting system to control their synchronous lifting or lowering, and the other two valve positions control the lateral extension or retraction of each lateral telescopic mechanism 224. The lifting rods 21 of each first hydraulic lifting mechanism are connected in series in one hydraulic circuit, and the lifting rods 21 of each second hydraulic lifting mechanism are connected in series in another hydraulic circuit. The cross-sections of the first support frame 3 and the second support frame 3 are U-shaped, and adjacent first support frames 3 or adjacent second support frames 3 are detachably connected to each other by connecting screw assemblies 31. The fixed guide plate 2242 and the lower support plate 222 are connected by two supporting connecting rods 223. The lower end of the lifting rod 21 is fixed with a connecting support seat 225, which is used to connect to the foundation platform by anchor bolts.

[0025] In use, the silo wall lifting system and the central cylinder lifting system of the entire shallow circular silo can be raised and lowered synchronously, thus cooperating to achieve the key lifting link of the reverse construction method. Since multiple hydraulic lifting mechanisms are used to form the corresponding silo wall and cylinder wall lifting system, it is not only flexible in use and layout, but also can achieve a larger tonnage lifting capacity through combination to adapt to the construction of shallow circular silos of different diameters. Moreover, the entire lifting process is very stable and reliable. More importantly, after the construction of one layer of silo wall or cylinder wall is completed, since the silo wall and cylinder wall have been connected into a whole by steel bars, the hydraulic lifting mechanism and the corresponding support frame 3 in use on the upper layer can be removed one by one and installed in the silo wall or cylinder wall of the next layer to realize the switching and transfer between the two layers and improve the utilization rate of the hydraulic lifting mechanism and support frame 3. Among them, the hydraulic lifting mechanism adopts the structure of upper insert plate 221 and lower support plate 222, so that there is more than one connection support point with the silo wall or cylinder wall, maximizing the load-bearing capacity while ensuring safety and making the stability higher. Compared with the existing technology, it has the advantages of flexible and convenient use, fast and efficient operation, and stable and reliable load bearing.

[0026] When using a center-supported, ventilated shallow circular silo lifting assembly for shallow circular silo construction, the following steps are included: The cast-in-place foundation platform 1 is a disc-shaped structure made of reinforced concrete. During pouring, installation annular grooves 11 and embedded steel reinforcement anchors are pre-reserved at the corresponding positions on the platform walls. An inner annular groove (not shown in the diagram) is pre-reserved at the corresponding position on the central cylinder 7, and embedded steel reinforcement anchors are also pre-reserved there. The positions of the installation annular grooves 11 and the inner annular groove are determined after measurement and layout. Both grooves are coaxially aligned with the foundation platform 1. Figure 1 The structure of the base platform 1 and the state of the mounting ring groove 11 on it when it is engaged with the last layer of the warehouse wall 45 are shown. Figure 2 This diagram shows the state after the final layer of the silo wall 45 is connected to the mounting ring groove 11. However, the final layer of the silo wall 45 was constructed last. Figure 10 The diagram illustrates the positional and connection relationships between the central cylinder 7, the warehouse walls, and the foundation platform 1. For example... Figure 3 , 4 As shown, after the foundation platform 1 is poured, a silo wall conveying mechanism 6 is coaxially installed in the area outside the mounting ring groove 11. The silo wall conveying mechanism 6 includes a support ring plate 61 and a conveying ring disc 62 that is rolled on the support ring plate 61 by rolling elements. A roller mounting groove 621 is provided at the lower part of the conveying ring disc 62, in which multiple rollers are evenly installed. The cross-section of the conveying ring disc 62 is U-shaped. The silo wall panel is placed in the groove of the conveying ring disc 62, and the conveying ring disc 62 is rotated to convey the silo wall panel to the corresponding position. The silo wall conveying mechanism 6 makes the transportation and position adjustment of the silo wall panel on the construction site more convenient and faster, significantly improving construction efficiency, and also protecting the silo wall panel from impact damage.

[0027] like Figure 3 , 17 As shown, multiple hydraulic lifting mechanisms, i.e., hydraulic lifting mechanisms 2 corresponding to the bin walls, are evenly installed circumferentially within the area of ​​the mounting annular groove 11 on the base platform 1. Each hydraulic lifting mechanism shares the same hydraulic system; for example, the hydraulic system is connected to each hydraulic lifting mechanism via multiple branch pipes connected to the main pipeline, driving them synchronously to achieve synchronous lifting. Specifically, as shown... Figure 17 , 18 As shown, the hydraulic system 8 includes an oil tank 81, a hydraulic pump 82 and its drive motor, a two-position four-way solenoid directional valve 83, a hydraulic oil distributor 84, and hydraulic pipeline joints. The hydraulic pump 82 draws hydraulic oil from the oil tank 81. After passing through filters, relief valves, and other common components of the hydraulic system 8, the hydraulic oil is distributed to the hydraulic oil distributor 84. The distributor adjusts the proportion of hydraulic oil according to the required load-bearing capacity of the hydraulic lifting mechanisms corresponding to the silo walls and the central cylinder, achieving different pressure adjustments. Ultimately, this allows the hydraulic lifting mechanisms corresponding to each silo wall and the central cylinder to rise and fall synchronously, and the entire hydraulic lifting mechanism of the silo wall and the central cylinder rises and falls synchronously, realizing the synchronous rising and falling of the entire silo wall and the cylinder wall. The pistons of each hydraulic lifting mechanism are connected to two external ports of the two-position four-way solenoid directional valve 83. By switching the valve position, the oil inlet and outlet of the chambers on both sides of the piston are switched, thus achieving the lifting and lowering functions. In addition, to facilitate the movement of the lateral telescopic mechanism, the two-position four-way solenoid valve can be replaced with a valve with more valve positions, thereby realizing the synchronous lateral telescopic extension and retraction of the lateral telescopic mechanism of each hydraulic lifting mechanism to insert or withdraw from the plug hole.

[0028] like Figure 5-7 As shown, the hydraulic lifting mechanism includes a lifting rod 21 that can move up and down and a lifting frame 22 fixed relative to the upper end of the lifting rod 21. The lifting frame 22 includes an upper insert plate 221 and a lower support plate 222 arranged vertically. The upper insert plate 221 can extend and retract laterally relative to the lifting frame 22. Specifically, as shown... Figure 6-7As shown, the upper insert plate 221 is driven by the lateral telescopic mechanism 224 to achieve lateral displacement. The lateral telescopic mechanism 224 includes a fixed guide plate 2242 and a hydraulic telescopic rod 2241. The fixed guide plate 2242 is horizontally arranged and has two symmetrically arranged first slide grooves 2243 and two second slide grooves 2244. The first slide grooves 2243 and the second slide grooves 2244 constitute the guide rail of the upper insert plate 221. The upper insert plate 221 is guided and slidably engaged in the corresponding first slide grooves 2243 and second slide grooves 2244 by two symmetrically arranged first sliders 2211 and two second sliders 2212. The number of first sliders 2211 and second sliders 2212 can be one or two to three arranged at intervals to ensure that it still has a high load-bearing capacity under the guided sliding engagement. The lower part of the fixed guide plate 2242 is fixedly connected to the connecting support base 225 via two symmetrically arranged supporting connecting rods 223. The lifting rod 21 is located between the two supporting connecting rods 223, and its upper end is connected to the fixed guide plate 2242. The lower cylindrical part of the lifting rod 21 is fixedly connected to the connecting support base 225. The hydraulic telescopic rod 2241 is installed on the upper part of the rear end of the fixed guide plate 2242. The front end of its output rod is connected to the upper insert plate 221 to push the upper insert plate 221 to move, realizing the function of inserting into the insertion hole 411 and withdrawing from the insertion hole 411. Corresponding to the installation of the central cylinder 7, multiple hydraulic lifting mechanisms are installed circumferentially in the area within the inner annular groove, namely the hydraulic lifting mechanism 70 corresponding to the central cylinder. It shares the same hydraulic system with the hydraulic lifting mechanism at the installation annular groove 11 to achieve synchronous lifting.

[0029] Assemble support frames 3 on the lower support plates 222 of each hydraulic lifting mechanism to form a ring structure. The cross-section of the support frame 3 is a U-shape with an open top. See the three-dimensional view of the single-piece structure of the support frame 3. Figure 8 The assembly status of support frame 3 is shown in the image. Figure 10 Among them, such as Figure 1 , 2 As shown, each layer of the warehouse wall is assembled from multiple warehouse wall units 413. Each warehouse wall unit 413 includes multiple warehouse wall panels. The outer vertical edges of the two side warehouse wall panels have rectangular cross-section support columns 414. At least one prestressing tendon 5 is inserted transversely into each warehouse wall unit 413, with both ends of the prestressing tendon 5 inserted and anchored in the support columns 414 of two adjacent warehouse wall units 413. Figure 12 , 13 The diagram illustrates the installation method of the prestressing tendons 5 and the structure of the supporting column 414. This method of installing the prestressing tendons 5, combined with the supporting column 414, not only simplifies construction but also ensures high overall connection strength and stability. Figure 10As shown, the length of the support frame 3 corresponds to the length of the silo wall unit 413, and adjacent support frames 3 are connected by connecting screw assemblies 31. This structure is not only convenient and quick to assemble and disassemble, but also has high overall stability. Furthermore, the support frame 3 can be paired one-to-one with the silo wall unit 413 to form an installation unit, meaning the support frame 3 can be assembled along with the silo wall unit 413. Simultaneously, the corresponding support frames 3 are assembled on the lower support plates 222 of each hydraulic lifting mechanism corresponding to the inner annular groove, forming a ring structure corresponding to the central cylinder 7.

[0030] The first layer of silo wall 41 is assembled on the ring-shaped support frame 3 after assembly. The first layer of cylinder wall 71 of the central cylinder 7 is then assembled on the corresponding support frame 3. Temporary supports are installed within the area of ​​the first layer of silo wall 41, and the silo roof 40 is assembled on the temporary supports, connecting the silo roof 40 to the first layer of silo wall 41. The structure of the silo roof 40 is as follows: Figure 9 , 11 As shown, it includes an upper ring beam 401 and a lower ring beam 403. A fan-shaped plate 402 is assembled between the upper ring beam 401 and the lower ring beam 403, and a tongue and groove 404 is reserved at the lower part of the lower ring beam 403 to facilitate docking with the first layer of warehouse wall 41.

[0031] The lateral telescopic mechanism 224 of each hydraulic lifting structure is synchronously controlled to extend the upper insert plate 221 and insert it into the corresponding insertion hole 411 of the silo wall, or into the corresponding insertion hole 411 of the cylinder wall. The hydraulic system is started, so that the lifting rods 21 of each hydraulic lifting mechanism rise synchronously, driving the silo top 40 and the first layer silo wall 41 to move more than the height of one layer of silo wall and then stop, so as to form the installation space of the lower layer silo wall below; so that the first layer cylinder wall 71, together with the first layer silo wall 41 and the silo top 40, rise synchronously, and the subsequent assembly of each layer of cylinder wall is also synchronized with the assembly of the corresponding silo wall.

[0032] Assemble the second layer of silo wall 42 within the installation space. First, detach the upper and lower support plates 222 of one hydraulic jacking mechanism from the corresponding silo wall and support frame 3, and remove the corresponding support frame 3 it supports. Install the removed support frame 3 on the lower part of one of the silo wall panels of the second layer of silo wall 42, and place the whole assembly on the lower support plate 222 of the hydraulic jacking mechanism that was just detached. Then, disassemble the remaining hydraulic jacking mechanisms and their corresponding support frames 3 in sequence and align them with the corresponding silo wall panels of the second layer of silo wall 42. During this process, complete the connection between the various silo wall panels of the second layer of silo wall 42 and between the silo wall panels of the first layer of silo wall 41. The same method is used for the central cylinder 7. Figure 10 As shown, this illustrates the state after assembling the second layer of warehouse wall 42 and the corresponding cylindrical wall.

[0033] Repeat the construction process of the second layer of silo wall 42 above to complete the installation and jacking of layers 1 to n-1 of the silo wall, where n refers to the total number of layers of the silo wall of the shallow circular silo.

[0034] The nth layer of the silo wall is installed within the installation annular groove 11 and connected to the pre-embedded steel reinforcement anchors. The nth layer of the silo wall has clearance grooves 451 at the lower support plates 222 corresponding to each hydraulic lifting mechanism. Figure 15 As shown, the depth of the clearance groove 451 is greater than the thickness of the lower support plate 222, ensuring that when the penultimate layer of the storage wall 4442 falls on the last layer of the storage wall 45, the lower support plate 222 can be smoothly pulled out from between the two storage walls, while the support frame 3 is no longer pulled out.

[0035] The hydraulic lifting mechanisms are lowered synchronously to place the (n-1)th layer of the warehouse wall on top of the nth layer of the warehouse wall, connecting the (n-1)th layer of the warehouse wall and the nth layer of the warehouse wall. The hydraulic lifting mechanisms are then disassembled, and their lower support plates 222 are pulled out laterally from the clearance groove 451.

[0036] Complete the sealing treatment at the joints between the silo wall panels. This involves installing water-swellable strips between the silo wall panels and the cylinder wall panels. After assembling each layer of silo and cylinder walls, grout is injected into the pre-reserved grouting ports 4131 on both the silo and cylinder walls. The grout fills the gaps between the silo and cylinder wall panels, and the water-swellable strips expand upon contact with the grout. The combination of grouting and water-swellable strips achieves a post-cast seal for the assembled silo and cylinder walls, significantly improving sealing performance and preventing seepage and leakage.

[0037] The prefabricated silo wall is composed of precast concrete curved silo wall panels of two types: those with and without support columns 414, which are assembled alternately, resulting in a high degree of modularity. Each silo wall panel is equipped with grouting grooves and water-swellable rubber strips around its perimeter, which can improve the sealing performance at the joints of the components and the overall stress coordination. The silo wall has two pre-set through-holes for prestressed tendons 5 in the middle, with circumferential prestressed tendons 5 inserted through them and anchored at both ends to the two ends of the silo wall with support columns 414, thereby improving the overall crack resistance and circumferential stiffness of the silo wall.

[0038] Both circumferential and vertical nodes adopt a composite connection method of "bolt-prestressed tendon 5-grouting" to achieve rapid assembly of the silo wall. While meeting the requirements of high assembly accuracy, it also has excellent airtightness, overall stability and crack resistance.

[0039] The silo roof 40 adopts a modular prefabricated assembly structure, consisting of reinforced concrete sector-shaped slabs 402 evenly distributed along the circumference, an upper ring beam 401, and a lower ring beam 403. The upper and lower ends of each sector-shaped slab 402 are connected to the upper ring beam 401 and the lower ring beam 403 respectively through pre-reserved tongue and groove joints 404 and bolts to achieve a stable assembly. After installation, the joints are sealed with high-performance sealing material, and a sprayed concrete layer is applied to improve the airtightness, seepage prevention, and crack resistance of the silo roof 40.

[0040] The central cylinder 7 is located at the center of the shallow circular silo. It is a vertically arranged circular cylinder structure, which is assembled on site using prefabricated reinforced concrete components. It has multiple functions such as structural support, construction guidance, ventilation and pressure reduction.

[0041] The synchronous jacking construction platform is used to realize the segmented assembly and vertical synchronous jacking of prefabricated silo wall components. It consists of two parts: a silo wall conveying mechanism 6 and a hydraulic jacking mechanism. The silo wall conveying mechanism 6 comprises three parts: a U-shaped bearing base 64, a support ring plate 61, and a conveying ring disc 62. The U-shaped bearing base 64 adopts a steel support structure and is installed on the construction platform to ensure the stability and horizontal accuracy of the entire conveying system. The support ring plate 61 is laid on the bearing base in a closed ring layout. The track is made of high-strength steel, which has good load-bearing capacity and wear resistance, and supports the smooth movement of components on the track. The conveying ring disc 62 is located on the track conveying line and is equipped with grooves that fit the bottom contour of the prefabricated silo wall and a buffer rubber pad layer to effectively protect the components from collisions and damage during transportation, while ensuring the stability and accurate positioning of the components during transportation.

[0042] The hydraulic jacking mechanism has good structural stability and flexible on-site layout. The coordinated bearing method of the upper insert plate 221 and the lower support plate 222 has the functions of repeated jacking, steady-state locking and position adjustment, which can realize the segmented lifting and stable support of the upper structure. The support frame 3 is arranged in a ring along the bottom of the wall of each layer of warehouse wall and the central cylinder 7, and works in conjunction with the upper insert plate 221 to support and lift the upper assembled warehouse wall and warehouse roof 40 structure, providing a reliable working space for the hoisting and assembly of the lower components.

[0043] This technical solution utilizes a hydraulic jacking mechanism to construct the silo walls layer by layer using a reverse construction method. Compared to existing cast-in-place methods, this approach significantly improves construction efficiency, reduces wet work, and minimizes cracking. The synchronous jacking of each hydraulic jacking mechanism ensures structural stability and precise control, enabling the smooth lifting of the superstructure and guaranteeing construction safety. Furthermore, the silo top and each silo wall are constructed on the ground, greatly reducing construction difficulty and the risks of high-altitude work, while also ensuring assembly accuracy. Additionally, it boasts advantages such as high integration of construction processes, small construction footprint, and strong environmental adaptability.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A centrally supported, ventilated, shallow circular chamber, comprising: Basic platform; The silo walls are cylindrical and are installed on the foundation platform; Its characteristic is that it further includes: The top of the silo is a conical structure with a round hole in the center. The central cylinder is coaxially mounted with the silo wall. Its lower end is installed on the foundation platform and its upper end is connected to a circular hole on the top of the silo. The inner cavity of the central cylinder is connected to the atmosphere through the circular hole. Multiple ventilation channels are evenly distributed along the circumference inside the central cylinder wall. The axis of the ventilation channels is parallel to the axis of the central cylinder. Multiple air outlets are spaced along the axial direction on the ventilation channels, and the air outlets lead to the area between the central cylinder and the silo wall.

2. The centrally supported ventilated shallow circular chamber according to claim 1, characterized in that, The silo walls, silo roof, and central cylinder are all prefabricated assembly structures.

3. A centrally supported, ventilated shallow circular chamber according to claim 2, characterized in that, When the upper and lower adjacent cylinder walls of the central cylinder are spliced ​​together, an elastic sealing ring is provided at the corresponding ventilation channel to achieve a sealed connection of the ventilation channels of the two adjacent cylinder walls.

4. A centrally supported, ventilated shallow circular chamber according to claim 1, characterized in that, The ventilation channel is formed by the inner hole of the ventilation pipe embedded in the wall of the central cylinder.

5. A centrally supported, ventilated shallow circular chamber according to claim 4, characterized in that, The air outlet is formed by the inner hole of the air outlet pipe embedded in the wall of the central cylinder, and the air outlet pipe is vertically connected to the ventilation pipe.

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