A precipitation device suitable for silty strata

Abstract

This invention provides a dewatering device suitable for silty sand strata, including a drainage bucket. The drainage bucket has an installation assembly and a filter assembly on its side. The filter assembly includes a cleaning bucket, a drain hole, a filter plate, a buffer pipe, a sealing block, and a spring. The inner wall of the cleaning bucket is slidably connected to the side of the drainage bucket, and the drain hole is located on the side of the cleaning bucket. Through the synergistic action of the cleaning bucket, spring, and sealing block, when silt accumulates to a certain level on the filter plate, the spring force pushes the cleaning bucket to slide, causing its inner wall to rub against the filter plate, automatically scraping off the silt adhering to the surface. No manual cleaning is required. The drain hole corresponds to the position of the filter plate, allowing the scraped silt to be directly discharged from the device, preventing secondary accumulation of silt and ensuring the filter plate remains permeable for a long time.

Description

Technical Field

[0001] This utility model belongs to the field of formation dewatering technology, specifically relating to a dewatering device suitable for silty sand formations. Background Technology

[0002] Silt strata are widely distributed in construction areas for various building projects, underground rail transit, municipal pipelines, and water conservancy projects. They are characterized by high porosity, loose structure, high permeability, and easy flow. In silt strata construction, dewatering is a crucial step. Its main purpose is to artificially lower the groundwater level below the construction surface, reduce soil moisture content, enhance foundation bearing capacity, and prevent geological disasters such as piping, quicksand, and landslides.

[0003] Currently, during construction in silty sand strata, precipitation devices are prone to becoming clogged with silt particles after several days of use, requiring frequent cleaning to ensure smooth precipitation operations. However, some current precipitation devices lack cleaning capabilities, while others cannot operate simultaneously with precipitation, necessitating shutdown for both functions and disrupting continuous precipitation operations. Utility Model Content

[0004] This utility model provides a dewatering device suitable for silty sand formations, aiming to solve the technical problem that existing dewatering devices cannot be easily cleaned, resulting in the inability to carry out continuous dewatering operations.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a dewatering device suitable for silty sand strata, including a drainage bucket and a filter assembly installed on the side of the drainage bucket;

[0006] The drain bucket has a water passage hole that communicates with the interior and a filter plate installed in the water passage hole.

[0007] The filter assembly includes a cleaning bucket, a drain hole, a buffer tube, a sealing block, and a spring. The inner wall of the cleaning bucket is slidably connected to the side of the drain bucket. The drain hole is located on the side of the cleaning bucket, and its position corresponds to the position of the filter plate. The buffer tube passes through the drain bucket and communicates with the inside of the drain bucket. The sealing block is fixedly installed inside the cleaning bucket and is used for a slidable sealing connection with the inner wall of the buffer tube. The spring is installed on the drain bucket and connected to the cleaning bucket. The spring drives the cleaning bucket to slide to remove impurities, and the sealing block opens or closes the buffer tube as the cleaning bucket moves.

[0008] Preferably, the dewatering device suitable for silty sand formations further includes an installation component, which includes a threaded sleeve, a limiting block, and a connecting nozzle. The connecting nozzle is fixed to the upper end of the drainage bucket and communicates with the drainage bucket. The limiting block is installed on the threaded sleeve, and the threaded sleeve is connected to the connecting nozzle.

[0009] Preferably, the threaded sleeve is threadedly connected to the connecting nozzle.

[0010] Preferably, the side of the limiting block is provided with a protrusion; the side of the connecting mouth is provided with a groove corresponding to the protrusion.

[0011] Preferably, there are multiple protrusions, which are evenly spaced along the circumference of the limiting block, and there are multiple grooves, which correspond one-to-one with the protrusions.

[0012] Preferably, the upper end of the buffer tube extends into the connecting nozzle.

[0013] Preferably, the lower end of the buffer tube has a water inlet gap with the bottom of the cleaning bucket; the buffer tube has two straight pipe sections and an expansion pipe section located between the two straight pipe sections, the inner diameter of the expansion pipe section being larger than the inner diameter of the straight pipe section; the straight pipe section and the expansion pipe section are connected by a tapered pipe; the sealing block is fitted between the lower straight pipe section and the expansion pipe section.

[0014] Preferably, a fixing rod is connected to the inner wall of the cleaning bucket, and one end of the fixing rod is connected to the side of the sealing block.

[0015] Preferably, the part of the inner wall of the cleaning bucket that contacts the filter plate is provided with a rubber scraper.

[0016] As can be seen from the above technical solution, compared with the prior art, in this utility model, through the synergistic action of the cleaning bucket, spring, and sealing block, when the powder and sand on the filter plate accumulate to a certain extent, the spring force pushes the cleaning bucket to slide, and its inner wall rubs against the filter plate, automatically scraping off the powder and sand attached to the surface, eliminating the need for manual cleaning. The drain hole corresponds to the position of the filter plate, and the scraped powder and sand can be directly discharged from the device through the drain hole, avoiding secondary accumulation of powder and sand, ensuring that the filter plate remains transparent for a long time, and reducing the frequency of equipment downtime maintenance due to blockage. In the installation component, the threaded sleeve and the connecting nozzle are connected by threads to achieve tight fixation between the device and the external equipment. At the same time, the protrusion of the limiting block and the groove of the connecting nozzle cooperate to further limit the relative rotation of the connection part, effectively resisting the vibration and impact during operation, ensuring that the device is installed stably in complex environments with powdery sand layers, and preventing loosening and falling off. Attached Figure Description

[0017] Figure 1A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0018] Figure 2 A schematic diagram showing the overall structure provided for an embodiment of this utility model;

[0019] Figure 3 A cross-sectional schematic diagram of the overall structure provided for an embodiment of this utility model;

[0020] Figure 4 A cross-sectional schematic diagram of the buffer tube provided in an embodiment of this utility model;

[0021] Figure 5 A cross-sectional schematic diagram of the drainage bucket provided in an embodiment of this utility model;

[0022] Figure 6 A cross-sectional schematic diagram of the cleaning bucket provided in an embodiment of this utility model;

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Drainage bucket;

[0025] 2. Mounting components; 21. Threaded sleeve; 22. Limiting block; 23. Connecting nozzle;

[0026] 3. Filter assembly; 31. Cleaning tank; 32. Drain hole; 33. Filter plate; 34. Buffer tube; 35. Spring; 36. Fixing rod; 37. Sealing block. Detailed Implementation

[0027] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] Please refer to the following: Figures 1 to 6 The present invention provides a dewatering device suitable for silty sand formations. The dewatering device for silty sand formations includes a drainage tank 1 and a filter assembly 3 installed on the side of the drainage tank 1.

[0029] The drain bucket 1 has a water passage hole communicating with the interior and a filter plate 33 installed in the water passage hole. The filter assembly 3 includes a cleaning bucket 31, a drain hole 32, a buffer tube 34, a sealing block 37, and a spring 35. The inner wall of the cleaning bucket 31 is slidably connected to the side of the drain bucket 1. The drain hole 32 is located on the side of the cleaning bucket 31, and its position corresponds to the position of the filter plate 33. The buffer tube 34 passes through the drain bucket 1 and communicates with the interior of the drain bucket 1. The sealing block 37 is fixedly installed inside the cleaning bucket 31 and slides to seal against the inner wall of the buffer tube 34. The spring 35 is installed on the drain bucket 1 and connected to the cleaning bucket 31. The spring 35 drives the cleaning bucket 31 to slide to remove impurities, and the sealing block 37 opens or closes the buffer tube 34 as the cleaning bucket 31 moves.

[0030] Compared with the prior art, the dewatering device for silty sand strata provided in this embodiment utilizes the synergistic action of the cleaning bucket 31, spring 35, and sealing block 37. When silty sand accumulates to a certain extent on the filter plate 33, the spring 35 pushes the cleaning bucket 31 to slide, and its inner wall rubs against the filter plate 33, automatically scraping off the silty sand attached to the surface. No manual cleaning is required. The drain hole 32 corresponds to the position of the filter plate 33, and the scraped silty sand can be directly discharged from the device through the drain hole 32, avoiding secondary accumulation of silty sand, ensuring that the filter plate 33 remains permeable for a long time, and reducing the frequency of equipment downtime maintenance due to blockage.

[0031] A preferred embodiment may be found in [reference needed]. Figure 2 The dewatering device suitable for silty sand formations also includes an installation component 2, which includes a threaded sleeve 21, a limiting block 22, and a connecting nozzle 23. The connecting nozzle 23 is fixed to the upper end of the drainage tank 1 and is connected to the drainage tank 1. The limiting block 22 is installed on the threaded sleeve 21, and the threaded sleeve 21 is connected to the connecting nozzle 23.

[0032] Specifically, the threaded sleeve 21 and the connecting nozzle 23 adopt a sealing design. The inner wall of the threaded sleeve 21 is machined with a trapezoidal thread, and the thread profile of the corresponding position on the outer wall of the connecting nozzle 23 is consistent with it. The thread engagement point is wrapped with PTFE tape or a rubber sealing ring is added to ensure that there is no water leakage after connection. When the threaded sleeve 21 is tightened until the limit block 22 and the end face of the connecting nozzle 23 are in contact, the compression of the sealing surface reaches 1-2mm, forming a reliable seal and preventing negative pressure leakage during water pumping.

[0033] The fluid channel of the connecting nozzle 23 is optimized. The connecting nozzle 23 is a variable diameter tubular structure. The upper port diameter is 50-80mm when connected to the external water pump, and the lower port diameter is 30-50mm when connected to the buffer pipe 34. The internal channel has a tapered transition to reduce water flow resistance. The connection between its bottom end and the buffer pipe 34 is sealed by welding. The inner wall of the interface is polished smooth to avoid water flow disturbance and sand deposition caused by protrusion.

[0034] The dewatering device for silty sand formations provided in this embodiment, compared with the prior art, features a threaded sleeve 21 and a connecting nozzle 23 connected by threads in the installation assembly 2, achieving a tight fixation between the device and external equipment. Simultaneously, the protrusion of the limiting block 22 engages with the groove of the connecting nozzle 23, further restricting the relative rotation of the connection points, effectively resisting vibration and impact during operation, ensuring the device is securely installed in the complex environment of silty sand formations, and preventing loosening and detachment.

[0035] A preferred embodiment may be found in [reference needed]. Figure 2 The threaded sleeve 21 is threadedly connected to the connecting nozzle 23.

[0036] Specifically, the threaded connection is adjustable and sealing. By tightening the thread, the device can be tightly fixed to external pumping and drainage equipment (such as water pumps), and it is easy to install and disassemble. The threaded engagement can be reinforced with PTFE tape or sealing rings to prevent negative pressure leakage or water leakage during pumping, ensuring that the external suction force is efficiently transmitted to the inside of the drainage tank 1, maintaining a negative pressure environment to drive the formation water into the device, and adapting to the temporary disassembly and assembly needs of the equipment during the construction of silty sand formations.

[0037] In a preferred embodiment, the side of the limiting block 22 is provided with protrusions. The side of the connecting nozzle 23 is provided with grooves corresponding to the protrusions. There are multiple protrusions, which are evenly spaced along the circumference of the limiting block 22. There are also multiple grooves, which correspond one-to-one with the protrusions.

[0038] Specifically, the engagement of the protrusion and the groove forms a double fixation, further restricting the relative rotation of the two on the basis of the threaded connection, resisting the torque generated by construction vibration, avoiding loosening of the threads during long-term operation, ensuring the connection stability of the device under complex working conditions such as vibration and settlement in silty sand strata, and reducing the risk of reduced pumping efficiency or device detachment due to loosening.

[0039] A preferred embodiment can be found in [the following text is missing from the original] Figures 3 to 5 The upper end of the buffer tube 34 extends into the connecting nozzle 23.

[0040] Specifically, the directly connected fluid channel reduces water flow resistance and energy loss, allowing external suction to act directly on the water in the buffer pipe 34, improving negative pressure transmission efficiency, accelerating the flow rate of water in the drainage bucket 1, ensuring that the filtered clean water is discharged quickly, and meeting the construction needs of rapidly lowering the groundwater level in silty sand strata.

[0041] A preferred embodiment may be found in [reference needed]. Figure 5The lower end of the buffer pipe 34 has a water inlet gap with the bottom of the cleaning tank 31. The buffer pipe 34 has two straight pipe sections and an expansion pipe section located between the two straight pipe sections, the inner diameter of the expansion pipe section being larger than the inner diameter of the straight pipe sections. The straight pipe sections and the expansion pipe section are connected by a tapered pipe. A sealing block 37 is fitted and installed between the lower straight pipe section and the expansion pipe section.

[0042] Specifically, the inner diameters of the upper and lower straight pipe sections are the same (e.g., 25mm), and the lower straight pipe section is interference-fitted with the sealing block 37. When the device is normally dewatering, the sealing block 37 remains stationary in the lower straight pipe section, which can completely seal the pipe section and ensure that the negative pressure generated by the external equipment is efficiently transmitted to the inside of the drainage tank 1 through the buffer pipe 34, forming a stable pumping force and avoiding the decrease in dewatering efficiency caused by negative pressure leakage.

[0043] The inner diameter of the expansion pipe section is larger than that of the straight pipe section (e.g., 35mm, which is 10mm larger than the straight pipe section). When the cleaning bucket 31 slides and scrapes away the sand under the push of the spring 35, the sealing block 37 moves synchronously into the expansion pipe section with the fixing rod 36. At this time, the sealing block 37 and the inner wall of the expansion pipe section form an annular gap (5mm), allowing some clean water to pass through, thus avoiding the complete interruption of water flow during the cleaning process.

[0044] This design addresses the drawback of existing technologies that require shutdown for cleaning, and in silty sand formations, it prevents groundwater level rise due to interrupted rainfall, reducing the risk of piping and quicksand.

[0045] The conical transition (45° cone angle) between the straight pipe section and the expansion pipe section allows the water flow to smoothly transition from the straight pipe section to the expansion pipe section, avoiding water flow turbulence and local head loss caused by right-angle turns. At the same time, the smooth conical inner wall can reduce the vortex formed by water flow impact, prevent silt from depositing and clogging at the transition point, and ensure smooth operation in the long term.

[0046] A preferred embodiment may be found in [reference needed]. Figure 3 A fixing rod 36 is connected to the inner wall of the cleaning bucket 31, and one end of the fixing rod 36 is connected to the side of the sealing block 37.

[0047] Specifically, the fixing rod 36 rigidly connects the cleaning bucket 31 and the sealing block 37 to achieve synchronous linkage between the cleaning action and the water flow adjustment, avoiding incomplete cleaning or water flow blockage caused by the disconnection of the two actions. When the cleaning bucket 31 slides to scrape off the powder and sand, the sealing block 37 slides synchronously to adjust the water flow, ensuring that the device can still maintain basic drainage during the cleaning process and improve work efficiency.

[0048] A preferred embodiment may be found in [reference needed]. Figure 4 A rubber scraper is provided on the inner wall of the cleaning bucket 31 where it contacts the filter plate 33.

[0049] Specifically, the rubber material is elastic and wear-resistant, which can fit tightly against the surface of the filter plate 33, enhance the scraping effect, and at the same time avoid mechanical damage to the filter plate 33 by the scraper, thoroughly remove the powder and sand (including stubborn powder and sand layers) attached to the filter plate 33, prevent the filter holes from clogging, and extend the service life of the filter plate 33.

[0050] The specific working principle of this utility model can be described as follows: First, the device is connected to an external drainage device (such as a water pump) through the installation component 2. The threaded sleeve 21 is screwed into the connecting nozzle 23. At the same time, the protrusion of the limiting block 22 is embedded into the groove of the connecting nozzle 23 to form a double fixation, ensuring a firm and sealed connection and resisting the vibration and impact during the construction of the silty sand stratum. After the external equipment is started, the suction force is transmitted to the inside of the drainage tank 1 through the connecting nozzle 23 (the connecting nozzle 23 is connected to the buffer pipe 34, forming a negative pressure in the drainage tank 1, driving the groundwater in the silty sand stratum to flow towards the device).

[0051] Groundwater enters the device through the water passage hole in the wall of the drainage tank 1. It first passes through the filter plate 33, which has a porous structure that can trap silt particles in the water, allowing only clean water to pass through, thus preventing silt from entering the device and causing blockage. The filtered clean water enters the drainage tank 1 and flows into the buffer pipe 34 through the lower water inlet gap. Finally, it is pumped away by external equipment through the connecting nozzle 23, completing the dewatering operation.

[0052] When the sand and dust accumulate on the surface of the filter plate 33 to a certain extent, the water resistance increases, and the impact of the water flow on the cleaning bucket 31 weakens. At this time, the elastic force of the spring 35 is released, pushing the cleaning bucket 31 to slide along the side of the drain bucket 1 (the cleaning bucket 31 and the drain bucket 1 are slidably connected). The part of the inner wall of the cleaning bucket 31 that contacts the filter plate 33 is equipped with a rubber scraper. During the sliding process, the rubber scraper closely adheres to the surface of the filter plate 33, thoroughly scraping off the attached sand and dust. The drain hole 32 on the side of the cleaning bucket 31 corresponds to the position of the filter plate 33. Under the slight impact of gravity and water flow, the scraped sand and dust pass directly through the drain hole 32. To prevent secondary accumulation, the cleaning tank 31 slides, and the sealing block 37 moves synchronously within the buffer tube 34 via the fixing rod 36. The expansion section (with an inner diameter larger than the straight section) of the buffer tube 34 provides space for the sealing block 37, ensuring that it does not completely close the buffer tube 34 when sliding, but only briefly adjusts the water flow speed to ensure that the basic drainage function is maintained during cleaning. After cleaning, the spring 35 drives the cleaning tank 31 to reset, and the sealing block 37 returns to its initial position with the fixing rod 36. The device returns to normal filtration status and waits for the next cleaning trigger. Thus, the entire workflow is completed.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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 dewatering device suitable for silty sand formations, characterized in that, It includes a drain tank (1) and a filter assembly (3) installed on the side of the drain tank (1); The drain bucket (1) has a water passage hole connected to the interior and a filter plate (33) installed in the water passage hole on the bucket wall; The filter assembly (3) includes a cleaning bucket (31), a drain hole (32), a buffer tube (34), a sealing block (37), and a spring (35). The inner wall of the cleaning bucket (31) is slidably connected to the side of the drain bucket (1). The drain hole (32) is opened on the side of the cleaning bucket (31), and the position of the drain hole (32) corresponds to the position of the filter plate (33). The buffer tube (34) passes through the drain bucket (1) and communicates with the inside of the drain bucket (1). The sealing block (37) is fixedly installed in the cleaning bucket (31) and is used to slide and seal with the inner wall of the buffer tube (34). The spring (35) is installed on the drain bucket (1) and connected to the cleaning bucket (31). The spring (35) drives the cleaning bucket (31) to slide to remove impurities. The sealing block (37) opens or closes the buffer tube (34) as the cleaning bucket (31) moves.

2. The dewatering device suitable for silty sand formations as described in claim 1, characterized in that, The dewatering device for silty sand formations also includes an installation component (2), which includes a threaded sleeve (21), a limiting block (22), and a connecting nozzle (23). The connecting nozzle (23) is fixed to the upper end of the drainage bucket (1) and communicates with the drainage bucket (1). The limiting block (22) is installed on the threaded sleeve (21), and the threaded sleeve (21) is connected to the connecting nozzle (23).

3. The dewatering device suitable for silty sand formations as described in claim 2, characterized in that, The threaded sleeve (21) is threadedly connected to the connecting nozzle (23).

4. The dewatering device suitable for silty sand formations as described in claim 2, characterized in that, The side of the limiting block (22) is provided with a protrusion; the side of the connecting mouth (23) is provided with a groove corresponding to the protrusion.

5. The dewatering device suitable for silty sand formations as described in claim 4, characterized in that, The number of protrusions is multiple and they are evenly spaced along the circumference of the limiting block (22). The number of grooves is multiple and they correspond one-to-one with the protrusions.

6. The dewatering device suitable for silty sand formations as described in claim 2, characterized in that, The upper end of the buffer tube (34) extends into the connecting nozzle (23).

7. The dewatering device suitable for silty sand formations as described in claim 1, characterized in that, The lower end of the buffer pipe (34) has a water inlet gap with the bottom of the cleaning bucket (31); the buffer pipe (34) has two straight pipe sections and an expansion pipe section located between the two straight pipe sections, the inner diameter of the expansion pipe section is larger than the inner diameter of the straight pipe section; the straight pipe section and the expansion pipe section are connected by a tapered pipe; the sealing block (37) is installed between the lower straight pipe section and the expansion pipe section.

8. The dewatering device suitable for silty sand formations as described in claim 1, characterized in that, The inner wall of the cleaning bucket (31) is connected to a fixing rod (36), one end of which is connected to the side of the sealing block (37).

9. The dewatering device suitable for silty sand formations as described in claim 1, characterized in that, The inner wall of the cleaning bucket (31) is provided with a rubber scraper at the part that contacts the filter plate (33).

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