Modular prefabricated assembly type sewage treatment tank

Abstract

The application belongs to the technical field of sewage treatment tank, and particularly relates to a modular prefabricated sewage treatment tank. The application comprises a pool main body, the pool main body comprises a plurality of prefabricated concrete module components arranged at intervals along the length direction of the pool main body, two adjacent prefabricated concrete module components are respectively set as a first module component and a second module component, a U-shaped joint seam is formed between the first module component and the second module component, the U-shaped joint seam is composed of a bottom plate joint seam at the bottom of the U-shaped joint seam and side plate joint seams at the two sides of the U-shaped joint seam, the U-shaped joint seam is provided with an elastic joint material filling and solidification structure layer, the first module component and the second module component are connected through a plurality of groups of connecting assemblies arranged at intervals along the length direction of the U-shaped joint seam, each group of connecting assemblies comprises a spherical hinge support, a first connecting rod, a sleeve, a second connecting rod, a ring-shaped limiting piece and an air spring. The application can be conveniently and quickly assembled on site, and meanwhile, the durability of the connecting part of the module component is improved.

Description

Technical Field

[0001] This invention belongs to the field of sewage treatment tank technology, and specifically relates to a modular prefabricated assembled sewage treatment tank. Background Technology

[0002] Traditional small-scale wastewater treatment plants mainly adopt two forms. The first is the cast-in-place reinforced concrete small-scale wastewater treatment plant: The treatment process is mainly decentralized, consisting of pretreatment, biological treatment, sedimentation, and disinfection. It involves numerous individual structures, large land area, long construction periods, extensive on-site work, multiple trades, limited space, and is time-consuming and labor-intensive. Furthermore, construction costs are even higher in remote areas such as rural or mountainous regions, making it difficult to promote traditional wastewater treatment systems. The second is the integrated steel small-scale wastewater treatment unit: The treatment process is mainly integrated. Typically, the service life of an integrated steel small-scale wastewater treatment unit is no more than 10 years. After 10 years, most plants using integrated wastewater treatment equipment face complete replacement, resulting in high depreciation costs. Integrated steel small-scale wastewater treatment units must be placed on the ground with reinforced concrete foundations and cannot be directly buried underground, limiting their application scenarios.

[0003] Against the backdrop of manufacturing transformation and upgrading, prefabricated construction technology has been widely applied in the construction industry due to its numerous advantages. Currently, prefabricated construction technology is most widely used in the building construction field, and its construction technology system is becoming increasingly mature. In recent years, various parties have also explored the application of reinforced concrete prefabricated technology in the field of water tanks. Existing prefabricated water tanks are mainly divided into prefabricated wet-connection water tanks and prefabricated dry-connection water tanks. Prefabricated wet-connection water tanks use precast components as the main body and cast-in-place concrete at the joints. However, in prefabricated water supply and drainage structures using wet-connection technology, the shrinkage at the interface between the precast and subsequently poured concrete is inconsistent, resulting in insufficient bonding strength and leading to cracking and water seepage. Prefabricated dry-connection water tanks use precast components as the main body and connectors at the joints. However, prefabricated water supply and drainage structures using dry-connection technology struggle to address the stress issues under water conditions within the slab. Connections using water-resistant rubber, waterstops, etc., suffer from severe leakage due to uneven deformation and cumulative damage from alternating hot and cold temperatures, and the joint connection methods are insufficient to meet deformation and waterproofing requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a modular prefabricated sewage treatment tank that is convenient for rapid on-site assembly and has improved durability.

[0005] The technical solution adopted by this invention to solve its technical problem is: a modular prefabricated assembled sewage treatment tank, including a tank body, the tank body including a plurality of prefabricated concrete modular components arranged at intervals along its length, two adjacent prefabricated concrete modular components being respectively designated as a first modular component and a second modular component, the first modular component and the second modular component forming an integral U-shaped splice joint, the U-shaped splice joint being composed of a bottom plate splice joint located at its bottom and side plate splice joints located on both sides, the first modular component and the second modular component being connected by means of a joint along the length of the U-shaped splice joint. Multiple sets of connecting components are connected at intervals along a 10-degree direction. Each set of connecting components includes a ball joint support, a first connecting rod, a sleeve, a second connecting rod, an annular limiting member, and an air spring. The joint end faces of the first and second module components respectively have mounting holes corresponding to the connecting components. Ball joint supports are fixed to the bottom walls of the mounting holes of the first and second module components respectively. Annular limiting members are fixed to the outer ends of the inner sidewalls of the mounting holes of the first and second module components respectively. One end of the outer sidewall of the sleeve passes through a... Annularly spaced air springs are connected to the inner wall of the annular limiting member on the first module component. The other end of the outer wall of the sleeve is connected to the inner wall of the annular limiting member on the second module component via annularly spaced air springs. One end of the first connecting rod forms a spherical hinge with the ball joint support on the first module component, and the other end forms a threaded connection with the inner wall of the sleeve. One end of the second connecting rod forms a spherical hinge with the ball joint support on the second module component, and the other end forms a clearance fit with the inner wall of the sleeve. The inner wall of the sleeve provides space for axial movement of the second connecting rod. When the air spring is in its natural state, the axis of the sleeve is perpendicular to the center plane of the U-shaped splice width direction. The end of the first connecting rod connected inside the sleeve extends out of the joint end face of the first module component, and the end of the second connecting rod connected inside the sleeve extends out of the joint end face of the second module component. The U-shaped splice has an elastic joint material filling and curing structure layer. The two sides of the elastic joint material filling and curing structure layer form a sealed connection with the joint end face of the first module component and the joint end face of the second module component, respectively, and wrap the middle area of ​​the outer wall of the sleeve.

[0006] A further preferred embodiment is that a sleeve partition is fixedly installed inside the sleeve, and there is a gap between the side of the sleeve partition facing the second connecting rod and the end of the second connecting rod connected inside the sleeve.

[0007] A further preferred embodiment is that the end face of the second connecting rod connected inside the sleeve is connected to the sleeve partition via a buffer spring.

[0008] A further preferred embodiment is that the joint end face of the first module component and the joint end face of the second module component are both vertical planes, the outer end face of the annular limiting member on the first module component is flush with the joint end face of the first module component, and the outer end face of the annular limiting member on the second module component is flush with the joint end face of the second module component.

[0009] A further preferred embodiment is that the inner end face of the annular limiting member on the first module component and the inner end face of the annular limiting member on the second module component are flush with the two end faces of the sleeve, respectively.

[0010] A further preferred embodiment is that the two ends of the outer side wall of the sleeve are respectively connected to the inner wall of the corresponding annular limiting member through a set of radial guide devices. Each set of radial guide devices is a vertical slide rail assembly or a horizontal slide rail assembly symmetrically arranged on both sides of the sleeve.

[0011] A further preferred option is that the material used to fill the cured structural layer with the elastic joint material is resin or rubber.

[0012] A further preferred embodiment is that some precast concrete modular components located in the central area of ​​the main body of the pool have partition walls integrated into their internal cavities, so that the main body of the pool is divided into multiple pool units.

[0013] A further preferred embodiment is that the ball joint support includes two symmetrically arranged support shell units, which are combined to form a spherical hinge cavity for matching and connecting the first connecting rod. The two support shell units are fixed together as an integral support shell by fixing bolts. The support shell is fixedly connected to a fixing panel, which is fixedly connected to the corresponding precast concrete module component by pre-embedded anchor bolts.

[0014] A further preferred embodiment is that the precast concrete module component has inspection holes on the inner wall surface of the main body of the pool that correspond one-to-one with the ball joint support. The inner end of the inspection hole is connected to the inner end of the installation hole, and the outer end of the inspection hole is equipped with an openable and closable sealing structure.

[0015] The beneficial effects of this invention are as follows: Two adjacent precast concrete modular components are respectively fixed with ball joint supports. Both the first and second connecting rods can rotate freely, and the end of the second connecting rod connected to the sleeve can extend and retract freely, enabling multi-degree-of-freedom relative movement between the modular components. This avoids stress concentration at the connection points of the modular components. An air spring connects the sleeve to the annular limiting member on the wall of the mounting hole, allowing the relative displacement to be automatically restored by changing the external soil and water pressure conditions and the upper load conditions when relative translation or torsion occurs between the modular components parallel to the connection surface. Resin, rubber, and other joint materials fill the U-shaped splice joint to form an elastic joint material filling and curing structural layer. This is implemented after the connection device is installed. When tension or compression occurs perpendicular to the connection surface, the deformation of the resin, rubber, and other joint materials prevents secondary stress in the modular structure, thus effectively ensuring the connection reliability at the joint and improving the overall durability of the device. By connecting and assembling precast concrete modular components of different specifications, an integrated underground prefabricated sewage treatment unit can be formed, realizing the completion of the entire sewage treatment system in a single sewage treatment structure, achieving integrated and intensive layout. Attached Figure Description

[0016] Figure 1 A top view of a wastewater treatment tank portion according to an embodiment of the present invention;

[0017] Figure 2 A partial elevation sectional view of a sewage treatment tank according to an embodiment of the present invention;

[0018] Figure 3 A plan view of the connection nodes between the module interfaces provided in one embodiment of the present invention;

[0019] Figure 4 This is a detailed diagram of the inter-module connection node according to an embodiment of the present invention.

[0020] Figure 5 One embodiment of the present invention Figure 4 A schematic diagram showing the connection and fit of components such as the ball joint support, the first connecting rod, the second connecting rod, and the sleeve;

[0021] Figure 6 One embodiment of the present invention Figure 4 A schematic diagram showing the connection and fit between components such as the middle sleeve, the annular limiting component, and the air spring;

[0022] Figure 7 One embodiment of the present invention Figure 4 Schematic diagram of the side elevation of the ball joint support;

[0023] Figure 8 One embodiment of the present invention Figure 4Schematic diagram of the front elevation of the ball joint support.

[0024] The components marked in the figure are: 1. Precast concrete module component; 2. Inspection hole; 3. Mounting hole; 4. U-shaped splice joint; 5. Fixing panel; 6. Embedded anchor bolt; 7. Ball joint support; 8. First connecting rod; 9. Sleeve; 10. Second connecting rod; 11. Annular limiting component; 12. Air spring; 13. External thread part; 14. Sleeve partition plate; 15. Fixing bolt; 16. Ball joint support shell connecting plate; 17. Ball joint support platform; 18. Support shell unit component. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 8As shown, the present invention includes a water tank body, which includes a plurality of precast concrete modular components 1 arranged at intervals along its length. Two adjacent precast concrete modular components 1 are respectively designated as a first modular component and a second modular component. An integral U-shaped splice joint 4 is formed between the first modular component and the second modular component. The U-shaped splice joint 4 is composed of a bottom plate splice joint located at its bottom and side plate splice joints located on both sides. The first modular component and the second modular component are connected by a plurality of sets of connecting components arranged at intervals along the length of the U-shaped splice joint 4. Each set of connecting components... The system includes a ball joint support 7, a first connecting rod 8, a sleeve 9, a second connecting rod 10, an annular limiting member 11, and an air spring 12. The joint end faces of the first and second module components each have mounting holes 3 corresponding to the connecting components. Ball joint supports 7 are fixed to the bottom walls of the mounting holes 3 of both the first and second module components. Annular limiting members 11 are fixed to the outer ends of the inner sidewalls of the mounting holes 3 of both the first and second module components. One end of the outer sidewall of the sleeve 9 is connected by an air spring arranged in annular intervals. Spring 12 is connected to the inner wall of the annular limiting member 11 on the first module component. The other end of the outer wall of sleeve 9 is connected to the inner wall of the annular limiting member 11 on the second module component through air springs 12 arranged in annular intervals. One end of the first connecting rod 8 forms a spherical hinge with the ball joint support 7 on the first module component, and the other end forms a threaded connection with the inner wall of sleeve 9. That is, the end of the first connecting rod 8 connected to the sleeve 9 has an external thread 13, and the sleeve 9 has a corresponding internal thread. One end of the second connecting rod 10 is connected to the ball joint support 7 on the second module component. The hinge support 7 forms a spherical hinge, and the other end forms a clearance fit with the inner wall of the sleeve 9. The inner wall of the sleeve 9 has space for the second connecting rod 10 to move axially, which means that one end of the second connecting rod 10 can freely extend and retract within the sleeve 9. When the air spring 12 is in its natural state, the axis of the sleeve 9 is perpendicular to the center plane of the width direction of the U-shaped splice 4. In the preferred embodiment, the joint end face of the first module component and the joint end face of the second module component are both vertical planes, and the sleeve 9 is simultaneously perpendicular to the joint end face of the first module component and the joint end face of the second module component. The end of the first connecting rod 8 connected to the sleeve 9 extends out of the joint end face of the first module component, and the end of the second connecting rod 10 connected to the sleeve 9 extends out of the joint end face of the second module component. That is, the gap area between the end face of the first connecting rod 8 and the end face of the second connecting rod 10 falls within the area where the U-shaped splice seam 4 is located. The U-shaped splice seam 4 has an elastic joint material filling and curing structure layer. The two sides of the elastic joint material filling and curing structure layer form a sealed connection with the joint end face of the first module component and the joint end face of the second module component, respectively, and wrap the middle area of ​​the outer wall of the sleeve 9.In practice, the connecting components are first installed and connected before the joint material is filled, finally forming the aforementioned elastic joint material filling and curing structural layer. The joint material can be any conventional sealant with waterproof properties and a certain degree of elasticity, such as resin or rubber. After employing the aforementioned force-transmitting and water-stopping connection nodes (spherical hinge support 7, first connecting rod 8, sleeve 9, second connecting rod 10, annular limiting member 11, air spring 12, and elastic joint material filling and curing structural layer), calculations and verification show that the prefabricated modular component unit connection can meet the relative displacement between modules caused by tension, shear, and torsion.

[0027] It is understood that the precast concrete module component 1 should have a certain strength to meet the structural strength requirements of the main body of the pool. It can usually be a reinforced concrete structure or various fiber-reinforced concrete. In the embodiments of the present invention, a reinforced concrete structure is preferred to meet the design service life of 50 years.

[0028] In this invention, multiple precast concrete modular components 1 can constitute the main body of the water tank, meaning that the two most end precast concrete modular components 1 have two end plates along the length of the main body of the water tank. The main body of the water tank in this invention can be broadly interpreted as a single tank (biological tank, sedimentation tank, etc.) in a wastewater treatment plant, or multiple tank units integrated into the same main body. In a preferred embodiment, multiple tank units are integrated into the same main body, meaning that some precast concrete modular components 1 located in the middle area of ​​the main body have integral partition walls within their internal cavities, thus dividing the main body of the water tank into multiple tank units. The specific location of the partition walls can be referenced from existing conventional wastewater treatment processes. By connecting and assembling precast concrete modular components 1 of different specifications and structural forms, an integrated underground prefabricated wastewater treatment unit can be formed, realizing the completion of the entire wastewater treatment system within a single wastewater treatment structure, achieving integrated and intensive layout.

[0029] To further improve structural reliability, a sleeve partition 14 is fixedly installed inside the sleeve 9. There is a gap between the side of the sleeve partition 14 facing the second connecting rod 10 and the end of the second connecting rod 10 connected to the sleeve 9. The sleeve partition 14 can provide axial restraint for the second connecting rod 10. In a preferred embodiment, the sleeve partition 14 is located at the midpoint of the length of the sleeve 9 and at the center of the width of the U-shaped splice 4.

[0030] To further improve structural reliability, the end face of the second connecting rod 10 connected inside the sleeve 9 is connected to the sleeve partition 14 by a buffer spring.

[0031] To further improve structural reliability, the joint end faces of the first module component and the second module component are both vertical planes. The outer end face of the annular limiting member 11 on the first module component is flush with the joint end face of the first module component, and the outer end face of the annular limiting member 11 on the second module component is flush with the joint end face of the second module component.

[0032] To further improve structural reliability, the inner end face of the annular limiting member 11 on the first module component and the inner end face of the annular limiting member 11 on the second module component are respectively flush with the two end faces of the sleeve 9.

[0033] To further improve structural reliability, both ends of the outer wall of the sleeve 9 are connected to the inner wall of the corresponding annular limiting member 11 via a set of radial guide devices. Each set of radial guide devices is a vertical slide rail assembly or a horizontal slide rail assembly symmetrically arranged on both sides of the sleeve 9. This means that the sleeve 9 and the inner wall of the annular limiting member 11 can only move relative to each other in the horizontal direction or in the vertical direction via the radial guide devices. In specific implementation, the arrangement of the radial guide devices can be determined according to the deformation characteristics of the underground sewage treatment device in a specific area.

[0034] For easy and rapid assembly, the ball joint support 7 includes two symmetrically arranged support shell units 18. The two support shell units 18 are combined to form a spherical hinge cavity for matching and connecting the first connecting rod 8. The two support shell units 18 are fixed together as an integral support shell by fixing bolts 15. The support shell is fixedly connected to a fixing panel 5, which is fixedly connected to the corresponding precast concrete module component 1 by pre-embedded anchor bolts 6. More specifically, a single support shell unit 18 is typically composed of a spherical arc shell, a ball joint support shell connecting plate 16, and a ball joint support platform 17. The spherical arc shell is used to form a spherical hinge cavity for matching and connecting the first connecting rod 8, the ball joint support shell connecting plate 16 is used for matching and connecting the fixing bolts 15, and the ball joint support platform 17 is used for fixing and connecting the fixing panel 5.

[0035] It is understandable that, apart from clearly defined components such as the air spring 12 and the buffer spring, the remaining parts in the connecting assembly are all rigid components with a certain strength, such as the fixed panel 5, the embedded anchor bolt 6, the ball joint support 7, the first connecting rod 8, the sleeve 9, the second connecting rod 10, the annular limiting member 11, and the sleeve partition 14, etc., which can usually be made of steel. In specific implementation, the embedded anchor bolt 6 can generally be an M20 high-strength bolt.

[0036] To facilitate assembly and maintenance, the precast concrete module component 1 has inspection holes 2 on the inner wall of the main body of the pool, corresponding one-to-one with the ball hinge support 7. The inner end of the inspection hole 2 connects to the inner end of the mounting hole 3, and the outer end of the inspection hole 2 is equipped with an openable and closable sealing structure. This sealing structure can be interpreted broadly as various conventional sealing doors, sealing plugs, etc., or it can be formed by filling with sealant. The inspection hole 2 is mainly used for inspecting and maintaining the ball hinge support 7.

Claims

1. A modular prefabricated assembled sewage treatment tank, comprising a tank body, the tank body including a plurality of prefabricated concrete modular components (1) spaced apart along its length, wherein two adjacent prefabricated concrete modular components (1) are respectively designated as a first modular component and a second modular component, characterized in that: The first module component and the second module component form an integral U-shaped splice seam (4). The U-shaped splice seam (4) consists of a bottom plate splice seam at its bottom and side plate splice seams on both sides. The first module component and the second module component are connected by multiple sets of connecting components arranged at intervals along the length of the U-shaped splice seam (4). Each set of connecting components includes a ball joint support (7), a first connecting rod (8), a sleeve (9), a second connecting rod (10), an annular limiting member (11), and an air spring (12). The joint end face of the first module component and the joint of the second module component are connected. Each end face has a mounting hole (3) corresponding to the connecting component. The bottom wall of the mounting hole (3) of the first module component and the bottom wall of the mounting hole (3) of the second module component are respectively fixed with ball joint supports (7). The outer end of the inner side wall of the mounting hole (3) of the first module component and the outer end of the inner side wall of the mounting hole (3) of the second module component are respectively fixed with annular limiting members (11). One end of the outer side wall of the sleeve (9) is connected to the inner wall of the annular limiting member (11) on the first module component through annularly spaced air springs (12). The other end of the outer side wall of the sleeve (9) is connected to the inner wall of the annular limiting member (11) on the first module component through annularly spaced air springs (12). The air spring (12) is connected to the inner wall of the annular limiting member (11) on the second module component. One end of the first connecting rod (8) forms a spherical hinge with the ball joint support (7) on the first module component, and the other end forms a threaded connection with the inner wall of the sleeve (9). One end of the second connecting rod (10) forms a spherical hinge with the ball joint support (7) on the second module component, and the other end forms a clearance fit with the inner wall of the sleeve (9). The inner wall of the sleeve (9) has space for the second connecting rod (10) to move axially. When the air spring (12) is in its natural state, the shaft of the sleeve (9) The line is perpendicular to the center plane of the width direction of the U-shaped splice (4). The end of the first connecting rod (8) connected to the sleeve (9) extends to the outside of the joint end face of the first module component. The end of the second connecting rod (10) connected to the sleeve (9) extends to the outside of the joint end face of the second module component. The U-shaped splice (4) has an elastic joint material filling and curing structure layer. The two sides of the elastic joint material filling and curing structure layer correspond to the joint end face of the first module component and the joint end face of the second module component to form a sealed connection, and wrap the middle area of ​​the outer wall of the sleeve (9) inside.

2. The modular prefabricated sewage treatment tank as described in claim 1, characterized in that: A sleeve partition (14) is fixedly installed inside the sleeve (9). There is a gap between the side of the sleeve partition (14) facing the second connecting rod (10) and the end of the second connecting rod (10) connected inside the sleeve (9).

3. The modular prefabricated sewage treatment tank as described in claim 2, characterized in that: The end face of the second connecting rod (10) connected inside the sleeve (9) is connected to the sleeve partition (14) by a buffer spring.

4. The modular prefabricated sewage treatment tank as described in claim 1, characterized in that: The joint end faces of the first module component and the second module component are both vertical planes. The outer end face of the annular limiting member (11) on the first module component is flush with the joint end face of the first module component, and the outer end face of the annular limiting member (11) on the second module component is flush with the joint end face of the second module component.

5. The modular prefabricated sewage treatment tank as described in claim 4, characterized in that: The inner end face of the annular limiting member (11) on the first module component and the inner end face of the annular limiting member (11) on the second module component are flush with the two end faces of the sleeve (9).

6. The modular prefabricated sewage treatment tank as described in claim 1, characterized in that: The two ends of the outer sidewall of the sleeve (9) are connected to the inner wall of the corresponding annular limiting member (11) through a set of radial guide devices. Each set of radial guide devices is a vertical slide rail assembly or a horizontal slide rail assembly symmetrically arranged on both sides of the sleeve (9).

7. The modular prefabricated sewage treatment tank as described in claim 1, characterized in that: The material used to fill the cured structural layer of the elastic joint material is resin or rubber.

8. The modular prefabricated sewage treatment tank as described in claim 1, characterized in that: The precast concrete module components (1) located in the middle of the main body of the pool have partition walls in their inner cavities, so that the main body of the pool is divided into multiple pool units.

9. The modular prefabricated sewage treatment tank as described in any one of claims 1 to 8, characterized in that: The ball joint support (7) includes two symmetrically arranged support shell units (18). The two support shell units (18) are combined to form a ball joint cavity for matching and connecting the first connecting rod (8). The two support shell units (18) are fixed together as an integral support shell by fixing bolts (15). The support shell is fixedly connected to a fixing panel (5). The fixing panel (5) is fixedly connected to the corresponding precast concrete module component (1) by pre-embedded anchor bolts (6).

10. The modular prefabricated sewage treatment tank as described in claim 9, characterized in that: The precast concrete module component (1) has inspection holes (2) on the inner wall surface of the main body of the pool, which correspond one-to-one with the ball joint support (7). The inner end of the inspection hole (2) is connected to the inner end of the mounting hole (3), and the outer end of the inspection hole (2) is equipped with an openable and closable sealing structure.

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