A filter
By designing a sliding filter cover and connecting cover, combined with a water guide pipe and screen, the problems of inconvenient installation and small contact area of the reverse filter are solved, achieving efficient filtration and simplified construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN LUGU CONSTR ENG CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-07-10
AI Technical Summary
Existing reverse filters are inconvenient to install on retaining walls, have a small contact area, too small a seepage cross section, are complex to construct and costly, and are not very practical.
Design a reverse filter including a filter cover and a connecting cover. The filter cover and the connecting cover are slidably connected to enclose an installation space. The filter element is built in. The filter cover can approach the connecting cover under soil pressure to compact the filter element. Combined with a water guide pipe and a screen, the filtration effect is improved.
It improves the filtration performance and practicality of reverse filters, simplifies the construction process, reduces costs, and increases the contact area and water conduction efficiency.
Smart Images
Figure CN224478437U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of retaining wall drainage technology, and in particular to a reverse filter. Background Technology
[0002] For drainage and filtration facilities for retaining walls and the soil behind them, some in-depth considerations and improvements have been made in the market. Compared with the traditional arrangement of drainage holes and filter bags, related technologies have begun to use structural designs to achieve the main functions of drainage and filtration. The main technical concept is to drill holes in the retaining wall and hang metal filter structures for filtration, or to lay long pipes filled with graded sand and gravel to perform filtration. However, there are still problems such as inconvenient structural installation, small contact area with soil, small seepage cross-section, uncertain implementation effect, high cost in some cases, and inconvenient construction in others, resulting in low market practicality. Utility Model Content
[0003] This utility model provides a reverse filter, the purpose of which is to improve the filtration performance and practicality of the reverse filter.
[0004] To achieve the above objectives, this utility model provides a reverse filter, comprising:
[0005] A filter cover includes an interconnected filter body and a first sidewall, the first sidewall surrounding the outer periphery of the filter body, the filter body having a plurality of perforations configured to filter first particles.
[0006] A connecting cover includes a connecting plate and a second sidewall that are interconnected. The second sidewall surrounds the outer periphery of the connecting plate. The connecting plate is disposed on the wall of a retaining wall near the soil. The connecting plate has a water guide hole that communicates with the drainage pipe of the retaining wall. The axial direction of the water guide hole is a first direction. The filter cover and the connecting cover are arranged along the first direction. The first sidewall and the second sidewall are both located between the filter body and the connecting plate along the first direction, so that the filter cover and the connecting cover can enclose an installation space. The first sidewall and the second sidewall are slidably connected, so that the filter body and the connecting plate have a first distance and a second distance in the first direction. The first distance is the sum of the dimensions of the first sidewall and the second sidewall in the first direction, and the second distance is the larger value of the dimensions of the first sidewall and the second sidewall in the first direction.
[0007] A filter element is disposed within the installation space, the filter element being configured to filter a second particle, the size of the first particle being greater than or equal to the size of the second particle.
[0008] In one embodiment, the filter cover includes a first protrusion disposed on the first sidewall and protruding outward from the second sidewall toward the second sidewall; the connecting cover includes a second protrusion disposed on the second sidewall and protruding outward from the first sidewall toward the second sidewall; the radial direction of the reverse filter is a second direction; the distance between the first sidewall and the second sidewall in the second direction is a third distance; the third distance is less than or equal to the sum of the dimensions of the first protrusion and the second protrusion in the second direction.
[0009] In one embodiment, the first protrusion is disposed along the first direction on the side of the first sidewall opposite to the filter body, and the second protrusion is disposed along the first direction on the side of the second sidewall opposite to the connecting plate, so that the filter body and the connecting plate can have the first distance and the second distance in the first direction.
[0010] In one embodiment, there are multiple first protrusions, and the multiple first protrusions are arranged at intervals along the first direction.
[0011] In one embodiment, there are multiple second protrusions, and the multiple second protrusions are arranged at intervals along the first direction.
[0012] In one embodiment, the reverse filter includes a water guide pipe, with a first axial end of the water guide pipe inserted into the drain pipe and a second axial end of the water guide pipe communicating with the water guide hole.
[0013] In one embodiment, the connecting cover further includes a screen, the screen being disposed on the water guide hole, the screen being configured to filter a third particle, the size of the second particle being greater than or equal to the size of the third particle.
[0014] In one embodiment, the dimensions of the filter body and the connecting plate in their radial direction are both in the range of 300mm to 500mm, and the dimensions of the first sidewall and the second sidewall in the first direction are both in the range of 45mm to 55mm.
[0015] The above-mentioned solution of this utility model has the following beneficial effects:
[0016] In this embodiment, the filter element typically needs to be compacted to achieve a better filtration effect. When the filter element is installed within the installation space, its compaction is usually insufficient due to its own elastic recovery force, ensuring that the installation space's dimension in the first direction is between a first distance and a second distance. The filter cover of this application can move relative to the connecting cover in the first direction. When the soil behind the retaining wall is backfilled in layers and compacted to the location of the reverse filter, the filter cover, under the pressure of the soil, can move as close as possible to the connecting cover in the first direction. That is, the dimension of the installation space in the first direction is reduced as much as possible to the second distance, thus compacting the filter element within the installation space. This improves the filtration effect of the filter element, and consequently, the filtration effect of the reverse filter.
[0017] Other beneficial effects of this invention will be described in detail in the following detailed description section. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the assembly of the filter and the retaining wall in one embodiment of the present invention;
[0019] Figure 2 This is a schematic diagram of the front of the filter in one embodiment of the present invention, with the water pipe indicated by dashed lines.
[0020] Figure 3 This is a schematic diagram of the structure of the back of the filter in one embodiment of the present invention;
[0021] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure at point AA;
[0022] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B.
[0023] [Explanation of Labels in the Attached Image]
[0024] 100. Reverse filter; 1. Filter cover; 11. Filter body; 111. Water seepage hole; 12. First side wall; 13. First protrusion; 2. Connecting cover; 21. Connecting plate; 211. Water guide hole; 22. Second side wall; 23. Second protrusion; 24. Screen; 3. Filter element; 4. Water guide pipe; 200. Retaining wall; 201. Drainage pipe; 300. Soil. Detailed Implementation
[0025] To make the technical problems, solutions, and advantages of this utility model clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0027] 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 locking 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.
[0028] Please see Figure 1 The filter 100 of this application is installed at the drainage pipe 201 on the back of the retaining wall 200 to filter and discharge excess water in the soil 300, thereby improving the stability of the soil 300. For example, there are multiple drainage pipes 201, which are arranged at intervals along the vertical direction. The number of filters 100 corresponds to the number of drainage pipes 201, and the multiple filters 100 are sequentially installed at corresponding positions on the drainage pipes 201 along the vertical direction to effectively filter and discharge water in the soil 300. For details, please refer to... Figures 2-4 The reverse filter 100 includes a filter cover 1, a connecting cover 2, and a filter element 3. The filter cover 1 and the connecting cover 2 can both be made of plastic or recycled plastic to reduce the weight of the reverse filter 100 and reduce the production cost of the reverse filter 100.
[0029] The filter cover 1 includes a filter body 11 and a first sidewall 12 connected to each other. The first sidewall 12 surrounds the outer periphery of the filter body 11, allowing the filter cover 1 to be configured as a recessed cover. For example, the filter body 11 can be configured as circular, and the first sidewall 12 surrounds the outer periphery of the circular filter body 11, allowing the filter cover 1 to be configured as such. Figure 2 and Figure 4 The circular concave cap is shown. The filter body 11 has multiple seepage holes 111, which are configured to filter the first particles. It should be noted that when the soil 300 is saturated with water, water carrying soil particles will seep out. The filter 100 needs to retain these soil particles within the soil 300 behind the retaining wall 200 to reduce the possibility of soil loss. The soil particles are of varying sizes, and the seepage holes 111 can filter the first particles among these soil particles.
[0030] The connecting cover 2 includes a connecting plate 21 and a second sidewall 22 connected to each other. The second sidewall 22 surrounds the outer periphery of the connecting plate 21, allowing the connecting cover 2 to be configured as a recessed cover. For example, the connecting plate 21 can be configured as circular, and the second sidewall 22 surrounds the outer periphery of the circular connecting plate 21, allowing the connecting cover 2 to be configured as such. Figure 3 and Figure 4 The circular concave cover is shown. A connecting plate 21 is installed on the wall of the retaining wall 200 near the soil 300. The connecting plate 21 has a water guide hole 211, which communicates with the drainage pipe 201 of the retaining wall 200, allowing water filtered by the filter 100 to flow through the water guide hole 211 into the drainage pipe 201, thus draining water from the soil 300 to the outside of the retaining wall 200. The axial direction of the water guide hole 211 is the first direction. For example, Figure 4 and Figure 5 The direction indicated by R1 is the first direction. The filter cover 1 and the connecting cover 2 are arranged along the first direction, and the first sidewall 12 and the second sidewall 22 are both located between the filter body 11 and the connecting plate 21 along the first direction, so that the filter cover 1 and the connecting cover 2 can be arranged as follows: Figure 4The filter cover 1 and connecting cover 2 interlock as shown, thereby creating an installation space. The first sidewall 12 and the second sidewall 22 are slidably connected. It should be noted that the slidable connection of the first sidewall 12 and the second sidewall 22 means that the first sidewall 12 can not only rotate relative to the second sidewall 22 about a first direction as its axis of rotation, but also move relative to the second sidewall 22 along the first direction. This allows the filter body 11 and the connecting plate 21 to have a first distance and a second distance in the first direction, and also allows the filter cover 1 to move relative to the connecting cover 2 in the first direction. The first distance is the sum of the dimensions of the first sidewall 12 and the second sidewall 22 in the first direction, and the second distance is the larger of the dimensions of the first sidewall 12 and the second sidewall 22 in the first direction, so that the size of the installation space in the first direction ranges from the second distance to the first distance.
[0031] Filter element 3 is disposed within the installation space and is configured to filter a second particle. For example, filter element 3 can be a loose, porous material such as rock wool or geotextile. The packing density of filter element 3 (rock wool or geotextile) within the installation space is not less than 90%. The size of the first particle is greater than or equal to the size of the second particle. For example, Figure 1 The single arrow in the diagram indicates the direction of water seepage within the soil 300. The seepage holes 111 on the filter body 11 first come into contact with the water, filtering out the larger first particles in the water. When the water flows into the installation space, the filter element 3 installed in the installation space can filter out the smaller second particles in the water, making it less likely that the water discharged outside the retaining wall 200 contains soil particles 300.
[0032] For example, the filter 100 can be manufactured and assembled in the factory and then transported to the construction site for installation, or the individual components can be manufactured in the factory and transported to the construction site for assembly.
[0033] In this embodiment, the filter element 3 typically needs to be compacted to achieve a better filtration effect. When the filter element 3 is installed within the installation space, its compaction is usually insufficient due to its own elastic recovery force, ensuring that the size of the installation space in the first direction is between the first and second distances. The filter cover 1 of this application can move relative to the connecting cover 2 in the first direction. When the soil 300 behind the retaining wall 200 is backfilled in layers and compacted to the position of the reverse filter 100, the filter cover 1, under the pressure of the soil 300, can move as close as possible to the connecting cover 2 in the first direction. That is, the size of the installation space in the first direction is reduced as much as possible to the second distance, thus compacting the filter element 3 within the installation space. This improves the filtration effect of the filter element 3, and consequently, improves the filtration effect of the reverse filter 100.
[0034] In one embodiment, please refer to Figure 4 and Figure 5 The filter cover 1 includes a first protrusion 13, which is disposed on the first sidewall 12 and protrudes from the second sidewall 12. For example, when the first protrusion 13 is made of plastic, it can be integrally injection molded with the filter body 11 and the first sidewall 12. When the filter body 11 and the first sidewall 12 are made of stainless steel or coated steel, the first protrusion 13 can be made of rubber. For example, the first protrusion 13 can be configured as an annulus, surrounding the first sidewall 12, and can serve as a stop-flow rubber ring. The first protrusion 13 may also include a plurality of first protrusions, which are spaced apart and arranged around the first sidewall 12. The connecting cover 2 includes a second protrusion 23, which is disposed on the second sidewall 22 and protrudes from the first sidewall 12. For example, when the second protrusion 23 is made of plastic, it can be integrally injection molded with the connecting plate 21 and the second sidewall 22. When the connecting plate 21 and the second sidewall 22 are made of stainless steel or coated steel, the second protrusion 23 can be made of rubber. For example, the second protrusion 23 can be configured as a ring, surrounding the second sidewall 22, and can also serve as a stop-water rubber ring. The second protrusion 23 may also include a plurality of second protrusions, which are spaced apart and arranged around the second sidewall 22.
[0035] The radial direction of the filter 100 is the second direction. For example, Figure 4 and Figure 5 The direction indicated by R2 is the second direction. The distance between the first sidewall 12 and the second sidewall 22 in the second direction is the third distance. The third distance is less than or equal to the sum of the dimensions of the first protrusion 13 and the second protrusion 23 in the second direction, so that when the filter cover 1 approaches the connecting cover 2 in the first direction, the first protrusion 13 can interfere with the second protrusion 23. The first sidewall 12 and / or the second sidewall 22 rely on their own elastic deformation to allow the filter cover 1 to continue to approach the connecting cover 2 in the first direction, so that the filter cover 1 can be installed on the connecting cover 2. When the filter cover 1 moves away from the connecting cover 2 in the first direction, the first protrusion 13 can also interfere with the second protrusion 23, preventing the filter cover 1 from moving further away from the connecting cover 2 in the first direction, so that the filter cover 1 is not easy to fall off the connecting cover 2.
[0036] In one embodiment, please refer to Figure 4 and Figure 5The first protrusion 13 is disposed along the first direction on the side of the first sidewall 12 away from the filter body 11, and the second protrusion 23 is disposed along the first direction on the side of the second sidewall 22 away from the connecting plate 21, so that the filter body 11 and the connecting plate 21 can have a first distance and a second distance in the first direction, thereby allowing the size of the installation space in the first direction to be adjusted between the maximum and minimum values, so that the installation space can accommodate as many filter elements 3 as possible. Under the pressure of the soil 300 behind the retaining wall 200, the filter elements 3 can be compacted as much as possible, which is beneficial to improving the filtration effect of the reverse filter 100.
[0037] In one embodiment, please refer to Figure 4 and Figure 5 The number of second protrusions 23 is multiple, and these multiple second protrusions 23 are arranged at intervals along the first direction, so that the distance between the filter body 11 and the connecting plate 21 in the first direction can be pre-adjusted in stages, which helps to improve the accuracy of adjusting the distance between the filter body 11 and the connecting plate 21. For example, please refer to Figure 5 The number of second protrusions 23 is three, and the three second protrusions 23 are arranged at intervals along the first direction. The number of first protrusions 13 is one, and the distance between two adjacent second protrusions 23 can range from 12mm to 20mm. One first protrusion 13 is disposed along the first direction on the side of the first sidewall 12 opposite to the filter body 11. In another embodiment, the number of first protrusions 13 is multiple, and the multiple first protrusions 13 are arranged at intervals along the first direction, which can also achieve the same technical effect, and will not be described in detail here.
[0038] In one embodiment, please refer to Figure 1 and Figure 4 The reverse filter 100 includes a water guide pipe 4, the first end of which is inserted into the drain pipe 201 along the axial direction, and the second end of which is connected to the water guide hole 211 along the axial direction.
[0039] For example, please refer to Figure 1 and Figure 4 The end of the water pipe 4 away from the connecting plate 21 can be tilted downwards, so that the water filtered by the filter 100 can be quickly discharged to the drain pipe 201 under the action of gravity, so as to be discharged outside the retaining wall 200. Figure 4 The angle shown by S1 is the angle between the wall of the water guide pipe 4 and the connecting plate 21, and S1 can be 85°. The length of the water guide pipe 4 can be 10cm. The diameter of the water guide pipe 4 can be smaller than the diameter of the drain pipe 201, for example, 32mm, 40mm, 50mm, 63mm or 90mm.
[0040] It should be noted that in related technologies, the soil behind the retaining wall is usually backfilled and compacted in layers after the retaining wall is constructed. However, the drainage filter structure behind the retaining wall is typically made of geotextile wrapped with graded crushed stone and placed at the location of the drainage pipes. This results in the drainage filter structure lacking a support point, requiring the soil behind the retaining wall to be backfilled to the elevation of the drainage pipes before the drainage filter structure can be fabricated on-site using the soil surface for support, which is time-consuming. If multiple drainage pipes are installed vertically along the retaining wall, multiple drainage filter structures must also be fabricated, and workers must wait for the soil to be backfilled and compacted to the elevation of the subsequent drainage pipes, consuming significant time and manpower. In this application, the first end of the water guide pipe 4 along the axial direction is inserted into the drain pipe 201, and the second end is connected to the water guide hole 211, that is, the second end is connected to the connecting plate 21. This allows the filter 100 of this application to not only effectively guide the filtered water into the drain pipe 201 for discharge to the outside of the retaining wall 200, but also allows the water guide pipe 4 of the filter 100 to be directly hung at the corresponding position on the drain pipe 201 as a hanging part, thereby enabling the filter 100 of this application to be able to effectively discharge the filtered water into the drain pipe 201 and discharge it to the outside of the retaining wall 200. Before backfilling and compacting the soil in layers 300 after the soil 300 is backfilled, the filter 100 is hung at the drainage pipe 201. When the soil 300 begins backfilling and compaction, the filter 100 can still be firmly set at the position of the drainage pipe 201 under the pressure of the soil 300. This not only saves the time for workers to wait for the soil 300 to be compacted in layers, but also eliminates the need to connect the connecting plate 21 to the retaining wall 200 by means of bolts or other methods, simplifying the construction steps of the filter 100 and reducing the construction difficulty of the filter 100.
[0041] In one embodiment, please refer to Figure 3 and Figure 4 The connecting cover 2 also includes a screen 24, which covers the water guide hole 211. The screen 24 is configured to filter a third particle, the size of which is greater than or equal to the size of the second particle. This allows the reverse filter 100 of this application to further filter finer soil particles 300, which helps to reduce the possibility of soil particles 300 in the water after filtration by the reverse filter 100.
[0042] In one embodiment, the radial dimensions of the filter body 11 and the connecting plate 21 are both in the range of 300mm to 500mm. For example, the radial dimensions of the filter body 11 and the connecting plate 21 can be 300mm, 400mm, or 500mm. The radial dimensions of the first sidewall 12 and the second sidewall 22 in the first direction are both in the range of 45mm to 55mm. For example, the radial dimensions of the first sidewall 12 and the second sidewall 22 in the first direction can be 50mm. This makes the radial dimensions of the filter cover 1 and the connecting cover 2 much larger than their dimensions in the first direction. On the one hand, this makes the distance by which the reverse filter 100 protrudes from the wall of the retaining wall 200 near the soil 300 in the first direction smaller, thereby reducing the impact of the layered backfilling and compaction of the soil 300 behind the retaining wall 200 on the reverse filter 100. On the other hand, this allows the structure of the reverse filter 100, excluding the water guide pipe 4, to be configured as a disc, thereby allowing the reverse filter 100 to have a larger contact area with the soil 300, which is beneficial to improving the filtration effect of the reverse filter 100.
[0043] For example, please refer to Figure 4 and Figure 5 The radial dimension of the filter body 11 can be 5mm to 10mm larger than the radial dimension of the connecting plate 21, so that the distance between the first sidewall 12 and the first sidewall 23 in the second direction is 5mm to 10mm. The dimensions of the first protrusion 13 and the second protrusion 23 in the second direction can both be 3mm to 5mm.
[0044] The reverse filter 100 of this application fully considers ease of use and compatibility with the compaction process of the soil 300 behind the retaining wall 200. The water passage section can be provided in different sizes and models as needed. The reverse filter 100 of this application has a simple structure, low cost, and reliable performance.
[0045] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A reverse filter, characterized in that, include: A filter cover includes an interconnected filter body and a first sidewall, the first sidewall surrounding the outer periphery of the filter body, the filter body having a plurality of perforations configured to filter first particles. A connecting cover includes a connecting plate and a second sidewall that are interconnected. The second sidewall surrounds the outer periphery of the connecting plate. The connecting plate is disposed on the wall of a retaining wall near the soil. The connecting plate has a water guide hole that communicates with the drainage pipe of the retaining wall. The axial direction of the water guide hole is a first direction. The filter cover and the connecting cover are arranged along the first direction. The first sidewall and the second sidewall are both located between the filter body and the connecting plate along the first direction, so that the filter cover and the connecting cover can enclose an installation space. The first sidewall and the second sidewall are slidably connected, so that the filter body and the connecting plate have a first distance and a second distance in the first direction. The first distance is the sum of the dimensions of the first sidewall and the second sidewall in the first direction, and the second distance is the larger value of the dimensions of the first sidewall and the second sidewall in the first direction. A filter element is disposed within the installation space, the filter element being configured to filter a second particle, the size of the first particle being greater than or equal to the size of the second particle.
2. The reverse filter according to claim 1, characterized in that, The filter cover includes a first protrusion disposed on the first sidewall and protruding outward from the second sidewall toward the second sidewall. The connecting cover includes a second protrusion disposed on the second sidewall and protruding outward from the first sidewall toward the second sidewall. The radial direction of the reverse filter is a second direction. The distance between the first sidewall and the second sidewall in the second direction is a third distance. The third distance is less than or equal to the sum of the dimensions of the first protrusion and the second protrusion in the second direction.
3. The reverse filter according to claim 2, characterized in that, The first protrusion is disposed along the first direction on the side of the first sidewall opposite to the filter body, and the second protrusion is disposed along the first direction on the side of the second sidewall opposite to the connecting plate, so that the filter body and the connecting plate can have the first distance and the second distance in the first direction.
4. The reverse filter according to claim 2, characterized in that, The number of the first protrusions is multiple, and the multiple first protrusions are arranged at intervals along the first direction; and / or, The number of the second protrusions is multiple, and the multiple second protrusions are arranged at intervals along the first direction.
5. The reverse filter according to claim 1, characterized in that, The reverse filter includes a water guide pipe, with a first axial end of the water guide pipe inserted into the drain pipe and a second axial end of the water guide pipe communicating with the water guide hole.
6. The reverse filter according to claim 1, characterized in that, The connecting cover also includes a screen, which is disposed on the water guide hole. The screen is configured to filter a third particle, the size of which is greater than or equal to the size of the third particle.
7. The reverse filter according to claim 1, characterized in that, The dimensions of the filter body and the connecting plate in their radial direction are both in the range of 300mm to 500mm, and the dimensions of the first sidewall and the second sidewall in the first direction are both in the range of 45mm to 55mm.