Building foundation pit drainage filtering and recycling device

Abstract

The utility model discloses a kind of building foundation pit drainage filtration recovery devices, it includes drainage pipeline and the pipeline support fixed to its lower end, drainage pipeline middle part is equipped with accumulation mechanism, accumulation mechanism includes multiple downspout fixedly connected with the lower end of drainage pipeline, accumulation tank communicated with the lower end of downspout, junk box inserted in accumulation tank and with front end is equipped with sealing plate, screen installed in the rear end of junk box, fixed in the outer wall of accumulation tank and with the cooperation of limiting sleeve and fixed bolt threaded seat, drainage pipe head connected with the right side of accumulation tank, set in the upper end of drainage pipeline and form the sealing cover plate of limit buckle by shaft support and snap ring, snap post, the rust removal mechanism is arranged in the inner side of pipeline support, and the building foundation pit drainage filtration recovery device provides the mechanized solution of high-efficiency separation recovery and oxidation deposition removal by accumulation mechanism and rust removal mechanism respectively for solid impurities and rust deposition.

Description

Technical Field

[0001] This utility model relates to the field of building foundation pit drainage, specifically a building foundation pit drainage filtration and recycling device. Background Technology

[0002] Excavation pit wastewater refers to mixed wastewater containing mud, sand, organic matter, and other pollutants generated during the construction of building foundation pits. During excavation and dewatering, groundwater, rainwater, and construction flushing water mix with soil, rock debris, grease, cementing agents, etc., forming highly turbid wastewater containing suspended solids and organic matter. It typically exhibits suspended mud and sand, high turbidity, and elevated chemical oxygen demand (COD), and may contain residual chemical additives from construction. Direct discharge can lead to safety and environmental risks such as blockage of municipal drainage networks, river pollution, over-extraction of groundwater, and land subsidence. Therefore, it is necessary to treat the wastewater through gravity settling, etc. Physical filtration methods such as flocculation sedimentation, sand filtration, and cloth filtration, combined with chemical or biochemical treatment, are used to separate, settle, and retain suspended solids and pollutants in wastewater. The treated water can be reused for construction dust suppression, equipment cleaning, or to replenish groundwater through reinjection wells, achieving water resource recycling. Meanwhile, the remaining sediment and flocculated sludge can be used as fill material or transported for disposal after dewatering and drying. The entire treatment system should have modular design, mechanized operation, easy maintenance, and on-site scalability to meet the needs of different foundation pit sizes, geological conditions, and water requirements, ensuring environmental compliance, energy conservation, and reduced maintenance costs at the construction site.

[0003] During the construction of building foundation pits, drainage systems need to filter and recycle groundwater and flushing wastewater within the pit. However, most current devices only treat silt and suspended particles in the water using conventional sedimentation and filtration methods, often neglecting the removal of rust water (high content of iron ions and iron oxide colloids). This results in the returned water having a distinct yellowish-brown color, causing pipe blockage, equipment corrosion, and environmental pollution during subsequent use or discharge. Furthermore, due to the lack of specific oxidation precipitation or adsorption removal measures for iron ions, rust water is difficult to effectively remove during filtration and circulation, leading to a decrease in the overall water recovery rate and a significant increase in system operation and maintenance frequency and costs. Based on this, this utility model designs a building foundation pit drainage filtration and recycling device to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a drainage filtration and recycling device for building foundation pits to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A building foundation pit drainage filtration and recycling device includes a drainage pipe and a pipe support fixed to its lower end. The drainage pipe has a storage mechanism in the middle, which includes multiple drain pipes fixedly connected to the lower end of the drainage pipe, a storage box communicating with the lower end of the drain pipes, a debris collection box inserted into the storage box and having a sealing plate at its front end, a strainer installed at the rear end of the debris collection box, a threaded seat fixed to the outer wall of the storage box and cooperating with a limiting sleeve and a fixing bolt passing through it, a drainage pipe head connected to the right side of the storage box, and a sealing cover plate located at the upper end of the drainage pipe and forming a limiting buckle with a shaft bracket, a retaining ring, and a retaining post. The pipe support has a rust removal mechanism inside, which includes an air injection pipe connected to the air supply pump's delivery end, an air distribution pipe inserted into the drainage pipe, a barrier net located before and after the air distribution pipe to prevent debris from returning, and a protective pad fixed to the barrier net.

[0006] Optionally, the drain pipe consists of three sets of self-draining pipes distributed from left to right at their lower ends.

[0007] Optionally, the front end of the waste collection box is made of steel sealing plate, and a sealing gasket is provided between the steel sealing plate and the storage box.

[0008] Optionally, the threaded seat, the limiting sleeve, and the fixing bolt cooperate to form a releasable locking structure so as to disassemble the waste collection box.

[0009] Optionally, the rust removal mechanism includes an air supply pump and an air injection pipe connected to its air circuit, with the air injection pipe branching off at its upper end.

[0010] Optionally, barrier nets are installed on both the front and rear sides of the air distribution pipe to prevent debris from entering with the airflow.

[0011] Optionally, a protective pad is fixedly installed on the barrier net to mitigate the impact of airflow and protect the barrier net.

[0012] Optionally, the sealing cover, shaft bracket, retaining ring, and retaining post together form an openable skylight structure for emergency placement of a temporary filter or manual inspection.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model is equipped with a storage mechanism, which achieves efficient separation and centralized recycling of various solid debris in the foundation pit drainage through multi-stage mechanical interception of three sets of drainage pipes, storage tanks, debris collection boxes and strain nets.

[0014] 2. In this utility model, a rust removal mechanism is provided. Relying on the synergistic effect of the air supply pump, air injection pipe, air distribution pipe, barrier net, and protective pad, the oxygen content in the water is rapidly increased and iron ions are oxidized and precipitated, thereby fundamentally eliminating rust water components. Attached Figure Description

[0015] Figure 1 This is a three-dimensional front view structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of this utility model from a frontal view. Figure 3 This is a three-dimensional top view of the structure of this utility model; Figure 4 This is a schematic diagram of the three-dimensional rear view structure of this utility model; Figure 5 This is a top view of the structure of this utility model; Figure 6 This is a three-dimensional sectional view of the structure of this utility model. Figure 1 ; Figure 7 This is a three-dimensional sectional view of the structure of this utility model. Figure 2 ; Figure 8 This is a three-dimensional sectional view of the structure of this utility model. Figure 3 ; Figure 9 This is a three-dimensional sectional view of the structure of this utility model. Figure 4 .

[0016] In the diagram: 1. Drainage pipe; 2. Accumulation mechanism; 201. Drain pipe; 202. Accumulation tank; 203. Waste collection box; 204. Strainer; 205. Threaded seat; 206. Limiting sleeve; 207. Fixing bolt; 208. Drainage pipe head; 209. Sealing cover; 210. Shaft bracket; 211. Snap ring; 212. Snap pin; 3. Rust removal mechanism; 301. Air supply pump; 302. Air injection pipe; 303. Air distribution pipe; 304. Barrier net; 305. Protective pad; 4. Pipe support. Detailed Implementation

[0017] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-9 In this embodiment of the utility model, a building foundation pit drainage filtration and recycling device includes a drainage pipe 1 and a pipe support 4 fixed at its lower end. The device is characterized in that: a storage mechanism 2 is provided in the middle of the drainage pipe 1. The storage mechanism 2 includes multiple drain pipes 201 fixedly connected to the lower end of the drainage pipe 1, a storage box 202 communicating with the lower end of the drain pipes 201, a debris collection box 203 inserted into the storage box 202 and having a sealing plate at its front end, a strainer 204 installed at the rear end of the debris collection box 203, and a limiting sleeve 206 fixed to the outer wall of the storage box 202 and passing through it. The fixed bolt 207 is fitted with a threaded seat 205, a drain pipe head 208 connected to the right side of the storage tank 202, and a sealing cover plate 209 set on the upper end of the drain pipe 1 and forming a limiting buckle with the retaining ring 211 and retaining post 212 through the shaft bracket 210; a rust removal mechanism 3 is set inside the pipe support 4. The rust removal mechanism 3 includes an air injection pipe 302 connected to the delivery end of the air supply pump 301, a distribution pipe 303 inserted into the drain pipe 1, a barrier net 304 set in front and behind the distribution pipe 303 to prevent debris from returning, and a protective pad 305 fixed on the barrier net 304.

[0021] The storage mechanism 2 is located in the middle of the drainage pipe 1. Its structure includes, in sequence, three drain pipes 201 distributed from left to right, a storage box 202 connected to the lower end of each drain pipe 201, a debris collection box 203 inserted into the storage box 202 and equipped with a steel sealing plate at the front end, a strainer 204 installed at the rear end of the debris collection box 203, a threaded seat 205 fixed to the outer wall of the storage box 202 and cooperating with the limiting sleeve 206 and the fixing bolt 207 passing through it, and a drain pipe head 208 connected to the right side of the storage box 202.

[0022] When the muddy water flows down from the drainage pipe 1 to the storage mechanism 2, the three drain pipes 201 evenly guide the water flow and suspended solids into the storage tank 202. Larger particles such as stones and steel parts are intercepted by the steel sealing plate at the front end of the debris removal box 203 inserted in the storage tank 202, and a good seal is maintained between the sealing gasket and the storage tank 202. Fine particles and water continue to flow through the strainer 204 at the rear end of the debris removal box 203, enter the drain pipe head 208 and be discharged or reused.

[0023] When the amount of solid debris accumulated in the debris collection box 203 reaches a certain level, the debris collection box 203 can be disassembled by loosening the fixing bolt 207 on the threaded seat 205 and sliding the limiting sleeve 206, the debris can be taken out, put back into the storage box 202 and the bolt 207 is tightened accordingly to restore normal operation.

[0024] The sealing cover 209 is set on the upper end of the drainage pipe 1. It is rotatably connected to the drainage pipe 1 through the shaft bracket 210. The retaining ring 211 and the retaining post 212 form a limiting buckle, which constitutes an openable inspection window, which is convenient for manual inspection or temporary placement of the filter screen.

[0025] The rust removal mechanism 3 is fixed inside the pipe support 4. Its structure includes an air supply pump 301, an air injection pipe 302 connected to the delivery end of the air supply pump 301, a distribution pipe 303 inserted into the drainage pipe 1, and a barrier net 304 respectively set in front of and behind the distribution pipe 303 to prevent debris from returning, and a protective pad 305 fixed on the barrier net 304.

[0026] During operation, the air supply pump 301 pressurizes the air and delivers it to the air distribution pipe 303 through the air injection pipe 302. The air is evenly released through the barrier nets 304 before and after the air distribution pipe 303, and the airflow impact is slowed down by the protective pad 305. This causes the ferrous ions dissolved in the water to be oxidized to ferric ions and generate ferric hydroxide precipitate. This precipitate, together with the suspended solids, is intercepted by the subsequent accumulation mechanism 2, achieving efficient removal of rust water.

[0027] In this embodiment, the accumulation mechanism 2 and the rust removal mechanism 3 work together to separate and recover various solid impurities in the foundation pit drainage, and remove rust water components from the water, ensuring the cleanliness of the recycled water and the continuous operation of the system.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drainage filtration and recycling device for building foundation pits, comprising a drainage pipe (1) and a pipe support (4) fixed at its lower end, characterized in that: The drainage pipe (1) is provided with a storage mechanism (2) in the middle. The storage mechanism (2) includes multiple drain pipes (201) fixedly connected to the lower end of the drainage pipe (1), a storage box (202) connected to the lower end of the drain pipes (201), a debris collection box (203) inserted into the storage box (202) and provided with a sealing plate at the front end, a strainer (204) installed at the rear end of the debris collection box (203), a threaded seat (205) fixed to the outer wall of the storage box (202) and cooperating with the limiting sleeve (206) and the fixing bolt (207) passing through it, and the right side of the storage box (202). The drain pipe head (208) is connected, and the sealing cover plate (209) is set on the upper end of the drain pipe (1) and forms a limiting buckle with the retaining ring (211) and the retaining post (212) through the shaft frame (210); the pipe support (4) is provided with a rust removal mechanism (3), which includes an air injection pipe (302) connected to the delivery end of the air supply pump (301), a gas distribution pipe (303) inserted into the drain pipe (1), a barrier net (304) respectively set in front and behind the gas distribution pipe (303) to prevent debris from returning, and a protective pad (305) fixed on the barrier net (304).

2. The building foundation pit drainage filtration and recycling device according to claim 1, characterized in that: The drain pipe (201) consists of three sets of self-draining pipes (1) distributed from left to right at their lower ends.

3. The building foundation pit drainage filtration and recycling device according to claim 1, characterized in that: The front end of the waste collection box (203) is made of steel sealing plate, and a sealing gasket is provided between the steel sealing plate and the storage box (202).

4. The building foundation pit drainage filtration and recycling device according to claim 1, characterized in that: The threaded seat (205) cooperates with the limiting sleeve (206) and the fixing bolt (207) to form a releasable locking structure so as to disassemble the waste collection box (203).

5. The building foundation pit drainage filtration and recycling device according to claim 1, characterized in that: The rust removal mechanism (3) includes an air supply pump (301) and an air injection pipe (302) connected to its air circuit, with the air distribution pipe (303) branching off from the upper end of the air injection pipe (302).

6. The building foundation pit drainage filtration and recycling device according to claim 1, characterized in that: The air distribution pipe (303) is equipped with barrier nets (304) on both the front and rear sides to prevent debris from entering with the airflow.

7. A building foundation pit drainage filtration and recycling device according to claim 1, characterized in that: A protective pad (305) is fixedly installed on the barrier net (304) to reduce the impact of airflow and protect the barrier net (304).

8. The building foundation pit drainage filtration and recycling device according to claim 1, characterized in that: The sealing cover (209), shaft bracket (210), retaining ring (211), and retaining post (212) together form an openable skylight structure for emergency placement of temporary filter screens or manual inspection.

Images