A detachable anti-clogging inverted filter drainage pipe for the energy dissipation section bottom plate of a water gate

Abstract

This utility model proposes a detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate, belonging to the field of drainage equipment technology. It includes a PVC drainage pipe and a stainless steel perforated pipe. Concrete is poured onto the outside of the PVC drainage pipe. When the concrete strength reaches a set value, the PVC drainage pipe is replaced with a stainless steel perforated pipe. The top of the stainless steel perforated pipe is secured with fixing bolts for detachable installation. The stainless steel perforated pipe is filled from top to bottom with 20-40mm graded crushed stone, 5-20mm graded crushed stone, and coarse sand. The bottom of the stainless steel perforated pipe is sealed with coarse sand. This design solves the problem of traditional drainage pipes being prone to clogging and difficult to replace. During flood season, the water flow contains a large amount of silt. After the flood, the silt settles. Using this detachable anti-clogging reverse filter drainage pipe can extend the service life of the drainage pipe and facilitate disassembly and replacement when clogging occurs, greatly improving the normal drainage of the drainage system and ensuring the safe operation of the project.

Description

Technical Field

[0001] This utility model belongs to the field of drainage equipment technology, specifically relating to a detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate. Background Technology

[0002] The seepage prevention and drainage design of a sluice gate is a crucial aspect of sluice gate engineering design. Drainage facilities are essential for reducing uplift pressure on the sluice gate's bottom slab and ensuring its safe operation. Traditional sluice gate drainage designs typically consist of a filter layer and drainage holes in the stilling basin's bottom slab. The common practice is to install PVC drainage pipes on the stilling basin's bottom slab downstream of the sluice gate. The bottom of the drainage pipes is wrapped with geotextile or constructed using 2-3 layers of different graded aggregates, with the particle size increasing from bottom to top in the seepage direction. The drainage holes are generally 5-10 cm in diameter, spaced 1.0 m to 2.0 m apart, in a staggered pattern.

[0003] The main construction steps of a traditional sluice gate bottom slab drainage system are as follows:

[0004] ① The foundation is excavated to the building surface;

[0005] ② Lay a filter layer;

[0006] ③ Pour the concrete cushion layer under the base slab;

[0007] ④ Pre-embed PVC drainage pipes. Pre-embed PVC drainage pipes need to pass through the concrete foundation. According to the arrangement spacing of the drainage holes, pre-embed the drainage pipes at the locations where the drainage holes are located (seal the pipe openings with plastic bags to prevent the pipe openings from being blocked by debris), with the pipe openings extending to the top of the filter layer. After fixing the drainage pipes, pour the plain concrete foundation layer.

[0008] ⑤ Install and tie the reinforcing steel bars for the stilling basin bottom slab;

[0009] ⑥ Pour concrete for the bottom slab of the stilling basin.

[0010] In practical engineering applications, especially during flood season, water bodies contain a large amount of silt. After the flood, the silt settles and accumulates in the drainage pipes, causing them to become clogged and ineffective. This prevents the drainage holes from functioning properly and poses safety hazards to the operation and management of sluice gate projects. Therefore, it is crucial to improve the design of drainage pipes and solve the problems of easy clogging and difficulty in replacement of traditional drainage pipes. Utility Model Content

[0011] This invention addresses the problems of existing technologies by providing a detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate, thereby solving the aforementioned problems encountered in actual engineering design.

[0012] To achieve the above objectives, the technical solution adopted in this application is as follows: a detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate, comprising: a PVC drainage pipe and a stainless steel perforated pipe. Concrete is poured on the outside of the PVC drainage pipe. When the concrete pouring strength reaches 70% of the design strength, the PVC drainage pipe is replaced with a stainless steel perforated pipe. The top of the stainless steel perforated pipe is locked with fixing bolts for detachable installation.

[0013] The stainless steel perforated pipe has staggered openings on its wall, and a grid mesh is installed at the upper and lower openings of the stainless steel perforated pipe. The stainless steel perforated pipe is filled with 5~20mm graded crushed stone, 20~40mm graded crushed stone and coarse sand from top to bottom. The bottom of the stainless steel perforated pipe is sealed with fine sand.

[0014] Furthermore, the stainless steel perforated pipe is disposed on the upper surface of the gravel cushion layer.

[0015] Furthermore, the poured concrete forms a reinforced concrete stilling basin bottom slab upon completion.

[0016] Furthermore, the diameter of the PVC drain pipe is greater than or equal to the diameter of the stainless steel drain pipe.

[0017] Furthermore, the diameter of the opening is 8~10mm.

[0018] Furthermore, the grid is made of stainless steel bars of 6mm thickness with a spacing of 2-3mm.

[0019] Furthermore, the crushed stone is 20-40mm graded crushed stone with a height of 200mm, and 5-20mm graded crushed stone with a height of 200mm; the coarse sand is 200mm high; the internal filter material, from the seepage direction, consists of coarse sand, 5-20mm graded crushed stone, and 20-40mm graded crushed stone in sequence.

[0020] Furthermore, the stainless steel flower tube has a diameter of 100mm and a wall thickness of 3mm.

[0021] Furthermore, the outer wall of the PVC pipe is wrapped with a layer of kraft paper.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0023] This utility model provides a detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate, comprising: a PVC drainage pipe and a stainless steel perforated pipe. Concrete is poured around the outside of the PVC drainage pipe. When the concrete reaches 70% of its design strength, the PVC pipe is removed and replaced with the stainless steel perforated pipe. The top of the stainless steel perforated pipe is secured with fixing bolts for detachable installation, solving the problem of difficult maintenance and replacement of traditional drainage pipes. During flood season, water bodies contain a large amount of silt. After the flood, the silt settles. This drainage pipe significantly enhances anti-clogging capabilities and is easy to disassemble and replace after clogging, effectively avoiding safety hazards caused by drainage pipe clogging failure. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a cross-sectional view of a detachable anti-clogging reverse filter drainage pipe used at the bottom plate of the energy dissipation section of a sluice gate according to this application;

[0026] Figure 2 This is a detailed structural diagram of a detachable anti-clogging reverse filter drainage pipe used at the bottom plate of the energy dissipation section of a sluice gate, as per this application;

[0027] Figure 3 This is a schematic diagram of the top-locking bolt at the upper opening of the perforated tube in this application;

[0028] In the diagram: 1—Reverse filter drain pipe; 101—Stainless steel perforated pipe; 102—20~40mm graded crushed stone; 103—5~20mm graded crushed stone; 104—Coarse sand (0.5-1mm); 105—Grid mesh (welded stainless steel strips) at the upper and lower pipe openings of the stainless steel perforated pipe; 106—O-ring seal; 107—Nut; 108—Top bolt; 2—Top locking bolt at the upper opening of the perforated pipe; 3—Reinforced concrete stilling basin bottom slab; 4—Crushed stone cushion layer; 5—Medium sand (0.25-0.5mm), used to adjust the installation elevation of the stainless steel perforated pipe. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0031] Example 1, such as Figures 1-3 As shown, this application provides a detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate, including a PVC drainage pipe and a stainless steel perforated pipe. Concrete is poured on the outside of the PVC drainage pipe. When the concrete pouring strength reaches the set value, the PVC drainage pipe is replaced with a stainless steel perforated pipe. Two symmetrical 50mm deep holes are reserved at the top of the stainless steel perforated pipe. The perforated pipe is detachably installed by locking it with the top locking bolt 2 at the top of the perforated pipe. The top locking bolt at the top of the perforated pipe includes a nut and two top bolts. The two top bolts are installed on the nut in the middle. The two ends of the top bolts extend into the reserved holes. The top bolts can be extended to both sides by rotating from the middle.

[0032] The stainless steel perforated pipe has staggered openings on its wall. The upper and lower openings of the stainless steel perforated pipe are fitted with grid mesh. The stainless steel perforated pipe is filled with 5~20mm graded crushed stone, 20~40mm graded crushed stone and coarse sand from top to bottom. The bottom of the stainless steel perforated pipe is sealed with fine sand (less than 0.25mm).

[0033] The stainless steel perforated pipe is installed on the upper surface of the crushed stone cushion layer. The seepage from the bottom plate of the sluice gate enters the reverse filter drainage pipe through the crushed stone cushion layer, and then passes through the coarse sand and graded crushed stone in the reverse filter drainage pipe before being discharged to the top of the stilling basin.

[0034] When the concrete pouring is completed, a reinforced concrete stilling basin bottom slab is formed.

[0035] The diameter of the PVC drainage pipe is greater than or equal to the diameter of the stainless steel perforated pipe;

[0036] The diameter of the opening is 8~10mm;

[0037] The grating is made of 6mm stainless steel bars with a spacing of 2-3mm.

[0038] The crushed stone is 20-40mm graded crushed stone with a height of 200mm, and the secondary graded crushed stone is 5-20mm graded crushed stone with a height of 200mm; the coarse sand is 200mm high; the internal filter material, from the seepage direction, is coarse sand, 5-20mm graded crushed stone, and 20-40mm graded crushed stone in sequence.

[0039] The stainless steel flower tube has a diameter of 100mm and a wall thickness of 3mm;

[0040] The outer wall of the PVC pipe is wrapped with a layer of kraft paper;

[0041] The concrete strength reaches 70% of the design strength, and the strength can reach 70% within 3 to 5 days after the concrete is poured;

[0042] After the crushed stone bedding layer under the base slab is laid, 100mm diameter PVC pipes should be pre-embedded at the locations with drainage holes. To prevent the PVC pipes from sticking to the concrete, a layer of kraft paper should be wrapped around the outer wall of the PVC pipes. The PVC pipes are used to create the drainage holes. After the stilling basin base slab is poured and the concrete strength reaches 70%, the PVC pipes should be removed and replaced with 100mm diameter, 3mm wall thickness stainless steel perforated pipes. Holes with a diameter of 8-10mm should be staggered on the perforated pipe walls. The upper and lower ends of the perforated pipes should be sealed with stainless steel gratings. The stainless steel gratings should be made of 6mm stainless steel strips with a spacing of 2-3mm. After sealing the bottom, filter material should be filled in, and then the top end should be sealed.

[0043] During the installation of the drainage pipes, the PVC drainage pipes must first be removed from the stilling basin floor slab. Using the PVC pipes as templates, medium sand is backfilled into the drainage holes formed on the stilling basin floor slab to the installation elevation. The drainage holes are generally arranged in a staggered pattern, with a spacing of 1.0m to 1.5m. These drainage holes are formed using the PVC as a template. Then, stainless steel perforated pipes (with welded grating mesh at the bottom) are placed. The perforated pipes are then filled sequentially with coarse sand, 5-20mm graded crushed stone, and 20-40mm graded crushed stone. After the filter media is filled, the upper pipe opening is sealed with stainless steel grating mesh, and the top is bolted in place. The gap between the stainless steel perforated pipes and the drainage holes is sealed with O-rings, and the gaps at the pipe openings are sealed with sealant to prevent fine particles from leaking out. Additionally, the bottom of the perforated pipes is backfilled with medium sand. This medium sand, besides being used to adjust the installation elevation of the perforated pipes, also fully fills the drainage holes, working together with the sealing rings to prevent fine particles from leaking out.

[0044] The main construction steps for drainage pipes are as follows:

[0045] ① The foundation is excavated to the building surface;

[0046] ② Lay a gravel cushion layer under the stilling basin floor slab;

[0047] ③ Pre-embed PVC drainage pipes. The pre-embedded PVC drainage pipes need to extend to the gravel bedding layer. According to the arrangement spacing of the drainage holes, pre-embed the drainage pipes at the locations where the drainage holes are located, with the pipe openings extending at least 100mm beyond the top of the base plate (the pipe openings should be sealed with plastic bags to prevent them from being blocked by debris); wrap the outer wall of the PVC pipe with a layer of kraft paper;

[0048] ④ Install and tie the reinforcing steel bars for the stilling basin bottom slab;

[0049] ⑤ Pour the stilling basin bottom slab concrete; after the stilling basin bottom slab is poured and the concrete strength reaches 70% of the design strength, remove the PVC pipe and replace it with a 100mm diameter, 3mm wall thickness stainless steel perforated pipe. The perforated pipe has staggered perforations with a diameter of 8-10mm. The top and bottom of the perforated pipe are sealed with stainless steel grating, using 6mm stainless steel strips spaced 2-3mm apart. After sealing the bottom with 105mm high-strength material, fill the filter media in sequence with coarse sand 104mm, 5-20mm graded crushed stone 103mm, and 20-40mm graded crushed stone 102mm, then seal the top. The elevation of the top of the perforated pipe is adjusted using a height adjustment device (5mm).

[0050] ⑥ The top of the perforated tube is secured with fixing bolts. If the perforated tube is damaged, the locking bolts can be opened to remove the stainless steel perforated tube and replace the relevant filter media, perforated tube, and sealing ring.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate, characterized in that, include: PVC drainage pipes and stainless steel decorative pipes are used. The outside of the PVC drainage pipe is poured with concrete. When the concrete pouring strength reaches 70% of the design strength, the PVC drainage pipe is replaced with a stainless steel decorative pipe. The top of the stainless steel decorative pipe is locked with fixing bolts for detachable installation. The stainless steel perforated pipe has staggered openings on its wall. The upper and lower openings of the stainless steel perforated pipe are fitted with grid mesh. The stainless steel perforated pipe is filled with 5~20mm graded crushed stone, 20~40mm graded crushed stone and coarse sand from top to bottom. The bottom of the stainless steel perforated pipe is sealed with coarse sand.

2. A detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate according to claim 1, characterized in that, The stainless steel perforated pipe is installed on the upper surface of the gravel cushion layer.

3. A detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate according to claim 1, characterized in that, When the concrete pouring is completed, a reinforced concrete stilling basin bottom slab is formed.

4. A detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate according to claim 1, characterized in that, The diameter of the PVC drainage pipe is greater than or equal to the diameter of the stainless steel perforated pipe. The PVC drainage pipe is wrapped with a layer of kraft paper to facilitate the installation of the stainless steel perforated pipe after removing the PVC drainage pipe from the concrete base slab.

5. A detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate according to claim 1, characterized in that, The diameter of the opening is 8~10mm.

6. A detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate according to claim 1, characterized in that, The grating is made of 6mm stainless steel bars with a spacing of 2-3mm.

7. A detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate according to claim 1, characterized in that, The crushed stone is 200mm high 20~40mm graded crushed stone and 200mm high 5~20mm graded crushed stone; the coarse sand is 200mm high; the internal filter material from the seepage direction is coarse sand, 5~20mm graded crushed stone, and 20~40mm graded crushed stone in sequence.

8. A detachable anti-clogging reverse filter drainage pipe for the bottom plate of the energy dissipation section of a sluice gate according to claim 1, characterized in that, The stainless steel perforated tube has a diameter of 100mm and a wall thickness of 3mm.

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