Modular multi-layer water filtering device for foundation pit

Abstract

The utility model relates to filter water device technical field especially relates to a modular multilayer filter water device for foundation pit, it includes end pipe, sets up a plurality of extension pipes at end pipe top, the bottom insertion of end pipe in the soil of foundation pit, end pipe and extension pipe coaxial arrangement, end pipe and extension pipe all include filter structure, leave the cavity between filter structure, be provided with the filling material for filtering accumulated water in the cavity, has improved the precision, water permeability, reliability when filtering of foundation pit accumulated water, effectively improved foundation pit precipitation efficiency, reduced construction cost.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit water filtration technology, and in particular to a modular water filtration device for foundation pits. Background Technology

[0002] During construction, a significant amount of water often accumulates in the foundation pit. Before further construction, this water needs to be treated. Currently, the treatment of water accumulation in foundation pits often involves using filter pipes to filter the water before discharge. However, traditional filter pipes are often single long pipes or simply connected. Due to the single-pipe connection, the structure consists of long, thin rods with low structural strength and reliability. Furthermore, single-layer filter screens or homogeneous filter media filling structures, due to their limited filtration levels, cannot effectively balance the conflict between coarse particle interception and fine particle permeation. Increasing the pore size to prevent clogging will cause fine sand to flow in, exacerbating pump wear. Conversely, decreasing the pore size to increase precision will easily lead to blockage by clay particles, causing a sharp drop in permeability. At the same time, the structural instability risk of flexible filter screens under deep soil pressure and the gradation disorder caused by the lack of rigid constraints in the filter media layer will further amplify the risk of sand inflow and failure. Therefore, this technical solution is proposed for improvement. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies in the poor filtration effect of rainwater accumulation in foundation pits, and to provide a modular water filtration device for foundation pits that improves the performance through multi-stage filtration.

[0004] This utility model is achieved through the following technical solution: a modular multi-layer water filtration device for foundation pits, which includes an end pipe and multiple extension pipes set at the top of the end pipe. The bottom of the end pipe is inserted into the soil of the foundation pit. The end pipe and the extension pipes are coaxially arranged. Both the end pipe and the extension pipes include a filter structure. A cavity is left between the filter structures. A filling material for filtering accumulated water is set inside the cavity.

[0005] Furthermore, the bottom of the end tube is provided with a tapered tube head, and the bottom of the extension tube is provided with a connector for connecting the end tube, the connector being hollow inside.

[0006] Furthermore, the connector of the extension tube is screwed to the top of the end tube.

[0007] Furthermore, the filter structure includes an outer tube 1 disposed on the outermost layer, an inner tube 2 disposed coaxially inside the outer tube 1, an inner tube 3 disposed coaxially inside the inner tube 2, and an inner tube 4 disposed coaxially inside the inner tube 3. Water permeable holes are staggered on the side walls of the outer tube 1, inner tube 2, inner tube 3 and inner tube 4.

[0008] Furthermore, the connector of the extension tube is an extension portion located at the bottom of its inner tube.

[0009] Furthermore, the opening ratio of the permeable holes of the outer tube one is greater than that of the inner tube two, the opening ratio of the inner tube two is greater than that of the inner tube three, and the opening ratio of the inner tube three is greater than that of the inner tube four.

[0010] Furthermore, the filling material includes a primary filter material disposed in the cavity between the outer tube one and the inner tube two, a secondary filter material disposed in the cavity between the inner tube two and the inner tube three, and a tertiary filter material disposed in the cavity between the inner tube three and the inner tube four.

[0011] Furthermore, the primary filter material is 3-5mm gravel, the secondary filter material is 0.5-1mm quartz sand, and the tertiary filter material is 0.2-0.5mm sintered ceramsite.

[0012] Furthermore, the outer tube one, inner tube two, inner tube three, and inner tube four are all made of rigid material.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The end pipe and extension pipe are detachably connected, and different numbers of extension pipes can be selected according to different foundation pit depths to achieve modular selective assembly;

[0015] 2. Multiple extension tubes can be interchanged, and if one section of the extension tube is damaged during use, it can be replaced in a timely manner, improving the applicability of the water filter tube;

[0016] 3. The multi-layered filtration structure filters accumulated water in multiple stages, improving the accuracy of water filtration in the foundation pit, effectively increasing the efficiency of foundation pit dewatering, and reducing construction costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the end tube structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the extension tube structure of this utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the end tube structure of this utility model;

[0021] Figure 5 This is a schematic cross-sectional view of the extension tube of this utility model;

[0022] Figure 6 This is a schematic diagram of the end cap structure of this utility model;

[0023] The components are: 1. End pipe; 101. Outer pipe one; 102. Inner pipe two; 103. Inner pipe three; 104. Inner pipe four; 2. Water permeable hole; 3. Extension pipe; 4. Connector; 5. Top cover. Detailed Implementation

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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.

[0025] 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 scope of protection of the present utility model.

[0026] Example 1

[0027] like Figure 1-6 As shown, this utility model proposes a modular multi-layer water filtration device for foundation pits, which mainly consists of an end pipe 1 set at the bottom and an extension pipe 3 detachably set at the top of the end pipe 1. Both the end pipe 1 and the extension pipe 3 adopt a multi-layer filtration structure design, and the multi-layer filtration structure is coaxially arranged. The cavity between these adjacent two layers of filtration structure is filled with filling materials of different particle sizes for filtering accumulated water, forming a multi-stage filtration system from coarse filtration to fine filtration.

[0028] The appropriate number of end pipes 1 and extension pipes 3 can be selected and assembled according to the depth of the foundation pit and geological conditions. The bottom of the end pipe 1 is designed with a tapered head to facilitate insertion into the soil at the bottom of the foundation pit and improve the stability of the device. The top of the end pipe 1 is used for detachable connection with the bottom connector 4 of the extension pipe 3 to achieve modular assembly. Both the end pipe 1 and the extension pipe 3 include an outermost outer pipe 101, which contains a multi-layer filter structure of inner pipes 102, 103, and 104 arranged coaxially inside. The connector 4 is the part of the inner pipe 104 that protrudes from the bottom of the extension pipe 3 and has male threads on its outer wall. The upper part of 04 is provided with female threads and screwed into the connector 4 to ensure a tight and stable connection, and to facilitate disassembly and installation. The connector 4 is located at the bottom of the extension pipe 3 and is hollow inside to ensure smooth water flow. During the dewatering operation, the water pump is placed inside the inner pipe 4 104 of the end pipe 1 and the outlet of the water pump is connected to the drainage pipe. After a certain period of time, the accumulated water enters the middle position after being filtered, and then the water pump is started to carry out dewatering treatment. A top cover 5 is also provided on the top of the extension pipe 3 to be installed on the top of the fixed extension pipe 3 to maintain the structural stability of the top and to facilitate the placement of the water pump and improve the use effect.

[0029] Multiple permeable holes 2 are staggered on the outer walls of the outer tube 101, inner tube 2 102, inner tube 3 103, and inner tube 4 104. The distribution and porosity of the permeable holes 2 are different. Specifically, the permeable holes 2 of the outer tube 101 have the largest porosity, which is used for the initial filtration of larger particles of impurities. As the water flows inward, the permeable holes 2 of the inner tube 2 gradually decrease in porosity, which further filters smaller particles of impurities. The permeable holes 2 of the inner tube 3 103 and inner tube 4 104 decrease in porosity in turn, which undertake the tasks of fine filtration and fine filtration, respectively. This allows the impurities to be intercepted by the filter material step by step as the water mixed with impurities gradually permeates inward, thereby improving the overall filtration accuracy.

[0030] Regarding the selection of filling materials, different grades of filter media are used between the multi-layer filter structure. Specifically, the cavity between outer tube 101 and inner tube 2 102 is filled with 3-5mm gravel, which effectively intercepts larger particles of impurities, preventing them from entering the inner filter layer. The cavity between inner tube 2 102 and inner tube 3 103 is filled with 0.5-1mm quartz sand, which has good filtration performance and can further filter smaller particles of impurities. The cavity between inner tube 3 103 and inner tube 4 104 is filled with 0.2-0.5mm sintered ceramic particles, which have a microporous structure and can achieve fine filtration, ensuring the quality of the effluent.

[0031] In this technical solution, the modular design of the interchangeable extension pipes allows the length of the filter pipe to be freely adjusted according to the actual depth of the foundation pit. When the foundation pit is deep, the length of the filter pipe can be extended by increasing the number of extension pipes 3; when the foundation pit is shallow, the number of extension pipes 3 can be reduced or the end pipe 1 can be used directly for dewatering. Furthermore, if a section of extension pipe 3 is damaged during use, it can be replaced in a timely manner, which not only improves the applicability of the filter pipe but also reduces construction costs. In addition, the all-steel frame structure of this utility model enhances its compressive strength. Under deep soil pressure, flexible filter screens are prone to structural instability. The steel structure of this technical solution can effectively resist soil pressure and maintain the stability of the filter pipe. At the same time, the design of multi-layer concentric steel pipes also enhances the rigidity of the filter pipe and reduces the instability risk caused by long and thin rod structures. The water inside the foundation pit is filtered step by step through the multi-layer filtration system of the filter device, and clear water is discharged. After the filter device has been used for a period of time, the filling material can be replaced or it can be cleaned and maintained as needed to ensure its long-term stable operation. The multi-layer filtration structure and modular assembly method of this technical solution improve the accuracy, permeability and reliability of the filtration of water in the foundation pit, effectively improve the dewatering efficiency of the foundation pit and reduce construction costs.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A modular multi-layer water filtration device for foundation pits, characterized in that: It includes an end pipe and multiple extension pipes set at the top of the end pipe. The bottom of the end pipe is inserted into the soil of the foundation pit. The end pipe and the extension pipes are coaxially arranged. Both the end pipe and the extension pipes include a filter structure. A cavity is left between the filter structures. A filling material for filtering accumulated water is placed inside the cavity.

2. The modular multi-layer water filtration device for foundation pits according to claim 1, characterized in that: The bottom of the end tube is provided with a tapered tube head, and the bottom of the extension tube is provided with a connector for connecting to the end tube, the connector being hollow inside.

3. The modular multi-layer water filtration device for foundation pits according to claim 2, characterized in that: The connector of the extension tube is screwed to the top of the end tube.

4. The modular multi-layer water filtration device for foundation pits according to claim 1, characterized in that: The filter structure includes an outer tube 1 on the outermost layer, an inner tube 2 coaxially arranged inside the outer tube 1, an inner tube 3 coaxially arranged inside the inner tube 2, and an inner tube 4 coaxially arranged inside the inner tube 3. Water-permeable holes are staggered on the side walls of the outer tube 1, inner tube 2, inner tube 3 and inner tube 4.

5. The modular multi-layer water filtration device for foundation pits according to claim 4, characterized in that: The connector of the extension tube is an extension portion located at the bottom of the inner tube.

6. The modular multi-layer water filtration device for foundation pits according to claim 5, characterized in that: The opening ratio of the permeable holes in the outer pipe one is greater than that in the inner pipe two, the opening ratio of the inner pipe two is greater than that in the inner pipe three, and the opening ratio of the inner pipe three is greater than that in the inner pipe four.

7. The modular multi-layer water filtration device for foundation pits according to claim 6, characterized in that: The filling material includes primary filter material disposed in the cavity between outer tube one and inner tube two, secondary filter material disposed in the cavity between inner tube two and inner tube three, and tertiary filter material disposed in the cavity between inner tube three and inner tube four.

8. The modular multi-layer water filtration device for foundation pits according to claim 7, characterized in that: The primary filter material is 3-5mm gravel, the secondary filter material is 0.5-1mm quartz sand, and the tertiary filter material is 0.2-0.5mm sintered ceramsite.

9. The modular multi-layer water filtration device for foundation pits according to claim 4, characterized in that: The outer tube 1, inner tube 2, inner tube 3 and inner tube 4 are all made of rigid material.

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