Combined type water filtering device of underground cavern drainage hole

Abstract

The invention relates to the technical field of drainage hole filtering, and particularly discloses a combined type water filtering device of an underground cavity drainage hole, which comprises a flow guide inner pipe and a flow guide outer pipe, the flow guide outer pipe is sleeved outside the flow guide inner pipe, and a gap is arranged between the flow guide inner pipe and the flow guide outer pipe; the flow guide inner pipe comprises a first conical cylinder and a sleeve, one end of the sleeve is closed, and the other end of the sleeve is communicated with a bottom opening of the first conical cylinder. The aperture of the first filtering hole is different from that of the second filtering hole, the aperture of the first filtering hole is larger than that of the second filtering hole, the first filtering hole is used for filtering large-particle gravel, and the second filtering hole is used for filtering fine-particle silt, so that underground water is filtered in a layered manner, and different filtered objects are accumulated in different spaces of the flow guide outer pipe; therefore, the condition of blockage of filtered matters is reduced.

Description

Technical Field

[0001] This invention relates to the field of drainage hole filtration technology, and specifically to a composite water filtration device for drainage holes in underground caverns. Background Technology

[0002] During the construction of underground caverns, the drainage system is a crucial component in ensuring the structural stability and construction safety of the underground caverns. Underground cavern construction often faces the problem of groundwater seepage, and groundwater often contains a large amount of impurities such as silt, rock debris, etc. If it is discharged directly or without effective filtration, it can easily lead to blockage of the drainage pipes in the drainage system, reduced drainage efficiency, and even risks such as instability of the surrounding rock and structural damage.

[0003] Currently, the commonly used filtration devices for drainage holes in underground caverns are mostly single-filtration structures (filter holes). Single-filtration structures have the following problems: In complex water quality with high sand content and many impurities, there are large and medium-sized gravel particles, as well as fine silt particles and some impurities of irregular shape and size; when the filter hole diameter of the single-filtration structure is large, fine silt particles will leak out, affecting the drainage water quality; when the filter hole diameter of the single-filtration structure is small, large gravel particles will quickly clog the filter hole of the water filtration device. Summary of the Invention

[0004] The purpose of this invention is to provide a composite water filtration device for drainage holes in underground caverns to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a composite water filtration device for drainage holes in underground caverns, comprising an inner guide pipe and an outer guide pipe, the outer guide pipe being sleeved outside the inner guide pipe, with a gap between the inner and outer guide pipes; the inner guide pipe comprising a first cone and a sleeve, one end of the sleeve being closed, and the other end of the sleeve communicating with the bottom opening of the first cone; a plurality of first filter holes are provided on the conical surface of the first cone, and a plurality of drainage ports are provided on the side wall of the sleeve; the first cone is located at the inlet of the outer guide pipe, and a second cone is installed at the outlet of the outer guide pipe, the conical surface of the second cone being provided with a plurality of second filter holes, the diameter of the first filter holes being larger than the diameter of the second filter holes; it also includes a partition ring, the outer side of the partition ring being fixedly connected to the inner wall of the outer guide pipe, the inner side of the partition ring being fixedly connected to the inner wall of the inner guide pipe, and the partition ring being located between the first filter holes and the drainage ports.

[0006] Furthermore, a filter cylinder is fixedly installed inside the sleeve, and the filter cylinder is arranged coaxially with the sleeve. There is a gap between the outer wall of the filter cylinder and the inner wall of the sleeve. Multiple third filter holes are provided on the side wall of the filter cylinder. The diameter of the third filter hole is smaller than the diameter of the first filter hole and larger than the diameter of the second filter hole.

[0007] Furthermore, the drainage port has a strip-shaped structure, and the strip-shaped direction of the drainage port is in the same direction as the axial direction of the inner guide tube.

[0008] Furthermore, the inner wall of the filter cartridge is provided with multiple spiral guide ribs.

[0009] Furthermore, the inlet of the guide pipe is equipped with a sealing fixing seat, and the sealing fixing seat is provided with multiple mounting holes for mounting bolts.

[0010] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The first filter hole and the second filter hole have different pore diameters. The pore diameter of the first filter hole is larger than that of the second filter hole. The first filter hole is used to filter large particles of gravel, and the second filter hole is used to filter fine particles of silt. This allows the present invention to filter groundwater in a tiered manner, accumulating different filter materials in different spaces of the outer guide pipe, thereby reducing the clogging of filter materials.

[0011] 2. A first cone is set up, with large-particle gravel placed at the angle between the outer wall of the first cone and the inner wall of the guide pipe. This allows for the maximum accumulation of large-particle gravel without significantly affecting the filtration effect of the first filter hole. Fine-particle sediment filtered by the second filter hole will accumulate in the cone section of the inner wall of the second cone. Compared with the existing technology where the filter hole faces the direction of groundwater flow, this method allows for the maximum accumulation of fine-particle sediment without significantly affecting the filtration effect of the second filter hole.

[0012] 3. A filter cylinder is fixedly installed inside the sleeve. The filter cylinder is arranged coaxially with the sleeve, and there is a gap between the outer wall of the filter cylinder and the inner wall of the sleeve. Multiple third filter holes are provided on the side wall of the filter cylinder. The third filter holes further filter medium-sized gravel, and the medium-sized gravel is piled up in the filter cylinder, so that large-sized gravel, medium-sized gravel and fine-grained silt are reasonably distributed in different areas, thereby minimizing the cleaning cycle of this invention. Attached Figure Description

[0013] Figure 1 This is an overall diagram of the present invention.

[0014] Figure 2 This is a cross-sectional view of the present invention.

[0015] Figure 3 This is a three-dimensional view of the cross-sectional structure.

[0016] Figure 4 This is a 3D view of the inner guide tube.

[0017] Figure 5 This is a perspective view of the present invention after the second cone has been disassembled.

[0018] Figure 6 This is the right view of the present invention.

[0019] Figure 7 This is the left view of the present invention.

[0020] The labels in the diagram are as follows: 1-Sealing fixing seat, 11-Mounting hole, 2-Outer guide tube, 3-First cone, 31-First filter hole, 4-Sleeve, 41-Drain port, 42-Filter cylinder, 43-Third filter hole, 44-Spiral guide rib, 5-Second cone, 51-Second filter hole. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, so as to provide a better understanding of the concept of the present invention, the technical problem solved, the technical features constituting the technical solution, and the technical effects brought about.

[0022] like Figures 1-3 , Figure 6 , Figure 7 As shown, a composite water filtration device for drainage holes in underground caverns includes an inner guide pipe and an outer guide pipe 2. The outer guide pipe 2 is sleeved outside the inner guide pipe, and there is a gap between the inner and outer guide pipes 2. The inner guide pipe includes a first cone 3 and a sleeve 4. One end of the sleeve 4 is closed, and the other end of the sleeve 4 is connected to the bottom opening of the first cone 3. A plurality of first filter holes 31 are provided on the conical surface of the first cone 3, and a plurality of drainage ports 41 are provided on the side wall of the sleeve 4. The first cone 3 is located at the inlet of the outer guide pipe 2, and a second cone is installed at the outlet of the outer guide pipe 2. 5. The conical surface of the second cone 5 is provided with a plurality of second filter holes 51, the diameter of the first filter hole 31 is larger than the diameter of the second filter hole 51; it also includes a partition ring, the outer side of the partition ring is fixedly connected to the inner wall of the outer guide pipe 2, and the inner side of the partition ring is fixedly connected to the inner wall of the inner guide pipe. The partition ring is located between the first filter hole 31 and the inlet 41; the groundwater flows from the inlet of the outer guide pipe 2 through the first filter hole 31 into the sleeve 4, then flows from the inlet 41 into the gap between the inner guide pipe and the outer guide pipe 2, and finally flows out from the second filter hole 51 of the second cone 5.

[0023] This invention mainly comprises an inner guide pipe and an outer guide pipe 2. One end of the outer guide pipe 2 is an inlet, and the other end is an outlet. Groundwater passes through the interior of the outer guide pipe 2 and is filtered. The inner guide pipe includes a first cone 3 and a sleeve 4. One end of the sleeve 4 is closed, and the other end is connected to the opening of the first cone 3. Multiple first filter holes 31 are provided on the first cone 3, and multiple drainage ports 41 are provided on the side wall of the sleeve 4. A partition ring is provided on the inner wall of the inner guide pipe, and the partition ring is located in the middle of the inner guide pipe. The first cone 3 is located at the inlet of the outer guide pipe 2, and the sleeve 4 is located at the outlet of the outer guide pipe 2. The flow process of the groundwater is as follows: the groundwater flows from the inlet of the outer guide pipe 2 through the first filter holes 31 into the sleeve 4, then flows from the drainage ports 41 into the gap between the inner guide pipe and the outer guide pipe 2, and finally flows out from the second filter holes 51 of the second cone 5. The first filter hole 31 and the second filter hole 51 have different diameters, with the first filter hole 31 having a larger diameter than the second filter hole 51. The first filter hole 31 is used to filter large particles of gravel, while the second filter hole 51 is used to filter fine particles of silt. This allows the invention to perform tiered filtration of groundwater, accumulating different filter materials in different spaces of the outer guide pipe 2, thereby reducing the likelihood of filter material blockage. Secondly, the first cone 3 is conical, with its conical part facing the inlet of the outer guide pipe 2. When large particles of gravel block some of the first filter holes 31, the groundwater still flows. During the groundwater flow, the water flow impacts the conical surface of the first cone 3, impacting the large particles of gravel blocked in the first filter holes 31. The impact direction is along the conical surface, making it easy for the continuous impact of the groundwater to push the large particles of gravel to the angle between the outer wall of the first cone 3 and the inner wall of the outer guide pipe 2. In existing technologies, filter holes are typically positioned directly opposite the inlet. In contrast, by using a first cone 3, large particles of gravel are placed at the angle between the outer wall of the first cone 3 and the inner wall of the guide pipe 2. This allows for the maximum accumulation of large particles without significantly affecting the filtration efficiency of the first filter hole 31. The cone 5 faces the outlet of the guide pipe 2. Multiple second filter holes 51 are provided on the cone surface of the second cone 5. When groundwater flows through the second cone 5 after one pass of filtration, the fine particles of sediment filtered through the second filter holes 51 accumulate in the cone section of the inner wall of the second cone 5. Compared to existing technologies where the filter holes face directly towards the groundwater flow, this method allows for the maximum accumulation of fine particles of sediment without significantly affecting the filtration efficiency of the second filter holes 51.

[0024] Furthermore, a filter cylinder 42 is fixedly installed inside the sleeve 4. The filter cylinder 42 is coaxially arranged with the sleeve 4, and there is a gap between the outer wall of the filter cylinder 42 and the inner wall of the sleeve 4. A plurality of third filter holes 43 are provided on the side wall of the filter cylinder 42. The diameter of the third filter hole 43 is smaller than the diameter of the first filter hole 31, and the diameter of the third filter hole 43 is larger than the diameter of the second filter hole 51. The filter cylinder 42 is located inside the sleeve 4. Multiple third filter holes 43 are provided on the side wall of the filter cylinder 42. The third filter holes 43 are located between the first filter hole 31 and the second filter hole 51. The aperture sizes of the first filter hole 31, the second filter hole 51 and the third filter hole 43 are: aperture of the first filter hole 31 > aperture of the third filter hole 43 > aperture of the second filter hole 51. Groundwater passes through the first filter hole 31, the third filter hole 43 and the second filter hole 51 in sequence, filtering out large particles of gravel, medium particles of gravel and fine particles of silt in sequence. The third filter hole 43 further filters the medium particles of gravel, accumulating the medium particles of gravel in the filter cylinder 42. This allows the large particles of gravel, medium particles of gravel and fine particles of silt to be reasonably distributed in different areas, minimizing the cleaning cycle of this invention.

[0025] like Figure 4 , Figure 5 As shown, the drainage port 41 is further described as a strip-shaped structure, with the strip-shaped direction of the drainage port 41 being in the same direction as the axial direction of the inner guide tube. The strip-shaped drainage port 41 can maximize the flow rate of the drainage port 41.

[0026] Furthermore, the inner wall of the filter cylinder 42 is provided with multiple spiral-shaped flow guide ribs 44. The spiral-shaped flow guide ribs 44 can guide the flow of groundwater, so that the groundwater flows in a spiral state within the filter cylinder 42. The beneficial effects of the spiral flow are: 1. The centrifugal force generated by the spiral flow causes medium-sized gravel and fine-sized silt to gather towards the side wall of the filter cylinder 42, thereby better separating the fine-sized silt; 2. The water in the filter cylinder 42 continuously flows in a spiral state, which can minimize the blockage of medium-sized gravel on the third filter hole 43.

[0027] Furthermore, a sealing mounting base 1 is installed at the inlet of the outer guide pipe 2, and the sealing mounting base 1 is provided with multiple mounting holes 11 for mounting bolts. The sealing mounting base 1 is used to increase the sealing performance of the present invention after installation.

[0028] The terms "connection" and "fixing" appearing in the description of this invention can refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meaning of the above terms in this invention should be understood according to the specific circumstances.

[0029] In the description of this invention, the terms "center," "upper," "lower," "horizontal," "inner," and "outer," etc., are used only to indicate the orientation or positional relationship for the convenience of describing this invention and to simplify the description, and do not indicate or imply a specific orientation that the device or element referred to must have, and therefore should not be construed as a limitation of this invention.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A composite water filtration device for drainage holes in underground caverns, characterized in that: It includes an inner guide tube and an outer guide tube (2), the outer guide tube (2) is sleeved on the outside of the inner guide tube, and there is a gap between the inner guide tube and the outer guide tube (2); The inner guide tube includes a first cone (3) and a sleeve (4). One end of the sleeve (4) is closed, and the other end of the sleeve (4) is connected to the bottom opening of the first cone (3). Multiple first filter holes (31) are provided on the cone surface of the first cone (3), and multiple drainage ports (41) are provided on the side wall of the sleeve (4). The first cone (3) is located at the inlet of the guide pipe (2), and the outlet of the guide pipe (2) is equipped with a second cone (5). Multiple second filter holes (51) are provided on the cone surface of the second cone (5). The diameter of the first filter hole (31) is larger than the diameter of the second filter hole (51). It also includes a partition ring, the outer side of which is fixedly connected to the inner wall of the outer guide tube (2), and the inner side of which is fixedly connected to the inner wall of the inner guide tube. The partition ring is located between the first filter hole (31) and the drain port (41).

2. The composite water filtration device for drainage holes in underground caverns according to claim 1, characterized in that: A filter cylinder (42) is fixedly installed inside the sleeve (4). The filter cylinder (42) is arranged coaxially with the sleeve (4), and there is a gap between the outer wall of the filter cylinder (42) and the inner wall of the sleeve (4). The filter cylinder (42) has multiple third filter holes (43) on its side wall. The diameter of the third filter hole (43) is smaller than that of the first filter hole (31), and the diameter of the third filter hole (43) is larger than that of the second filter hole (51).

3. The composite water filtration device for drainage holes in underground caverns according to claim 1, characterized in that: The drainage port (41) is a strip-shaped structure, and the strip-shaped direction of the drainage port (41) is in the same direction as the axial direction of the inner guide tube.

4. The composite water filtration device for drainage holes in underground caverns according to claim 2, characterized in that: The inner wall of the filter cylinder (42) is provided with multiple spiral guide ribs (44).

5. A composite water filtration device for drainage holes in underground caverns according to claim 1, characterized in that: The inlet of the guide pipe (2) is equipped with a sealing fixing seat (1), and the sealing fixing seat (1) is provided with multiple mounting holes (11) for mounting bolts.

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