Foundation pit dewatering recovery and utilization device
By designing a foundation pit dewatering recovery and utilization device, the mud scraping structure scrapes away the mud during the lifting and lowering process inside the filter cylinder, solving the problem of mud removal in the existing technology and realizing efficient foundation pit dewatering recovery and utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 中交雄安建设有限公司
- Filing Date
- 2025-08-29
- Publication Date
- 2026-07-31
AI Technical Summary
In existing methods for dewatering foundation pits, pumping out accumulated water removes mud, which leads to cumbersome and labor-intensive subsequent mud removal steps, affecting the efficiency of foundation pit dewatering recycling.
Design a foundation pit dewatering recovery and utilization device, including a vertical frame, a horizontal frame, a sludge scraper, a water filter, a drainage pipe, an outer sludge scraper structure and an inner sludge scraper structure. The water filter is driven to rise and fall inside the sludge scraper by a lifting drive mechanism. The outer and inner sludge scraper structures scrape the sludge from the outer and inner sides of the water filter, respectively, to achieve direct sludge filtration and water recovery.
While ensuring filtration efficiency, it reduces subsequent mud treatment work, improves the efficiency of pit dewatering and recycling, and the mud is retained in the pit without further treatment.
Smart Images
Figure CN224578751U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of foundation pit dewatering recovery technology, and in particular to a foundation pit dewatering recovery and utilization device. Background Technology
[0002] Dewatering of foundation pits refers to the process of lowering the groundwater level during excavation when the groundwater level is higher than the excavation bottom, causing groundwater to continuously seep into the pit. This dewatering is done to ensure the pit can be constructed under dry conditions, preventing slope instability, quicksand, pit bottom heave, piping, and a decrease in the bearing capacity of the foundation. Common dewatering methods include: open ditch dewatering with sump wells, lightweight wellpoint dewatering, jet wellpoint dewatering, electro-osmotic wellpoint dewatering, and deep wellpoint dewatering, among others.
[0003] Current methods of foundation pit dewatering, such as open ditch and sump dewatering, involve first draining the accumulated water from the pit and then pumping it out. This pumping process also removes mud, posing challenges to subsequent dewatering and recycling. A significant mud removal step is required, along with cleaning the mud filtration equipment to ensure effectiveness. This involves a substantial amount of work, and the filtered mud also requires further treatment. If most of the mud were filtered directly from the foundation pit or the sump in open ditch and sump dewatering methods while simultaneously pumping out the water, it would save considerable time and effort in subsequent mud removal. Furthermore, the mud would remain in the foundation pit or sump without further treatment, effectively improving the efficiency of foundation pit dewatering and recycling.
[0004] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a device for recycling and utilizing ground pit dewatering. Utility Model Content
[0005] The purpose of this invention is to provide a device for recycling and utilizing ground pit dewatering in order to solve the above-mentioned problems.
[0006] To achieve the above objectives, this utility model provides the following technical solution: The foundation pit dewatering recovery and utilization device of this utility model includes: The uprights and the horizontals are provided, with the uprights fixed vertically to the outside of the pit and the horizontals horizontally positioned on the uprights and above the pit. A sludge scraper is fixedly installed vertically below the crossbeam and extends into the pit. A filter cylinder extends into and slides within a sludge scraper cylinder. A closed top plate is fixedly installed on the top of the filter cylinder to seal the top of the filter cylinder. A sludge discharge port is provided at the bottom of the filter cylinder. A drainage pipe, one end of which extends from the closed top plate into the filter cylinder, and the other end of which is connected to an externally installed recycling water tank to store the recycled pit rainwater; An outer scraping structure is provided inside the scraping cylinder to scrape away mud from the outer surface of the filter cylinder when the filter cylinder moves up and down. An inner sludge scraping structure is provided below the cross frame and extends into the filter cylinder to scrape off the sludge from the inner surface of the filter cylinder when the filter cylinder moves up and down. And a lifting drive mechanism, which is located below the cross frame to drive the filter cylinder to move up and down within the sludge scraper cylinder.
[0007] Furthermore, fixed connecting rods are provided on both sides of the upper end of the sludge scraper, and the upper ends of the fixed connecting rods are fixedly connected to the cross frame.
[0008] Furthermore, the filter cylinder has a mesh structure to block the mud outside the filter cylinder, and the water after filtering the mud enters the filter cylinder and is then extracted through the drain pipe.
[0009] Furthermore, the outer scraping structure includes: Inclined scraping protrusions are provided on the inner surface of the scraper cylinder. Multiple inclined scraping protrusions are continuously arranged from top to bottom and distributed in a spiral shape inside the scraper cylinder. And a bottom scraper ring, which is coaxially disposed at the bottom of the scraper cylinder. The inner side of the bottom scraper ring protrudes from the inner surface of the scraper cylinder and has the same protrusion height as the inclined scraper protrusion. The outer side of the bottom scraper ring protrudes from the outer surface of the scraper cylinder.
[0010] Furthermore, the inner sludge scraping structure includes a central push rod, the upper end of which is fixedly connected to the cross frame, and the lower end of which extends through the closed top plate into the filter cylinder. One end of the central push rod extending into the filter cylinder is provided with an annular sludge scraping structure for scraping the sludge from the inner wall of the filter cylinder downwards and discharging it from the sludge discharge port.
[0011] Furthermore, the annular scraper structure includes: A support ring is provided inside the filter cylinder and does not contact the inner wall of the filter cylinder. The inner side of the support ring is fixedly supported by a support rod between it and the lower end of the central push rod. And a sludge scraper ring, the upper end of which is coaxially connected to the support ring, and the lower end which extends outward to the inner wall of the filter cylinder to scrape off the sludge.
[0012] Furthermore, the lifting drive mechanism includes: The first drive rod has one end vertically connected to the upper surface of the closed top plate and the other end extending upward through the cross frame; A telescopic cylinder is fixedly mounted on the crossbeam, with its telescopic end facing upwards and fixedly connected to the upper end of the first drive rod. A guide tube is provided that passes vertically through the cross frame and is fixedly connected to the cross frame. And a second drive rod, one end of which is vertically connected to the upper surface of the closed top plate, and the other end is inserted into the guide tube and slides within the guide tube.
[0013] In the above technical solution, the foundation pit dewatering recovery and utilization device provided by this utility model has the following beneficial effects: When using this device for the recycling of dewatering in foundation pits, the filter cylinder equipped with a scraper is directly inserted into the foundation pit or sump containing water to filter and collect the water. The water is then pumped through a drain pipe to a recycling tank for direct reuse or re-sedimentation as needed. As the filter cylinder moves within the scraper, the outer and inner scraper structures scrape away mud from the outer and inner surfaces of the filter cylinder, respectively. This ensures efficient water intake into the filter cylinder while directly filtering the mud, thus guaranteeing efficient drainage. This approach ensures efficient foundation pit dewatering and recycling while simultaneously achieving efficient mud filtration. It also saves significant amounts of subsequent mud removal work, as the mud remains in the foundation pit or sump without further treatment, effectively improving the efficiency of foundation pit dewatering and recycling. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0015] Figure 1 A schematic diagram of the structure of the foundation pit dewatering recycling device provided in this embodiment of the utility model; Figure 2 A schematic diagram of the filter cylinder extending into the sludge scraper cylinder of the foundation pit dewatering recycling device provided in this embodiment of the utility model; Figure 3 A schematic diagram of the outer sludge scraping structure of the foundation pit dewatering recycling device provided in this embodiment of the utility model; Figure 4 A schematic diagram of the inner sludge scraping structure of the foundation pit dewatering recycling device provided in this embodiment of the utility model.
[0016] Explanation of reference numerals in the attached figures: 1. Vertical frame; 2. Horizontal frame; 3. Sludge scraper cylinder; 4. Filter cylinder; 5. Enclosed top plate; 6. Sludge discharge port; 7. Drain pipe; 8. Recycling water tank; 9. Fixed connecting rod; 10. Inclined sludge scraper protrusion; 11. Bottom sludge scraper ring; 12. Central push rod; 13. Support ring; 14. Support rod; 15. Sludge scraper ring; 16. First drive rod; 17. Telescopic cylinder; 18. Guide tube; 19. Second drive rod. Detailed Implementation
[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0018] Please see Figure 1-4 The foundation pit dewatering recovery and utilization device includes: The upright frame 1 and the horizontal frame 2 are vertically fixed to the outside of the foundation pit, or the top of the foundation pit, or other locations such as the outside or top of the sump well, to support the horizontal frame 2 above the foundation pit or sump well, playing the main supporting role. The horizontal frame 2 is horizontally set on the upright frame 1 and located above the foundation pit to facilitate the suspension and support of the foundation pit dewatering recycling device. The sludge scraper 3 is fixedly installed vertically below the crossbeam 2 and extends into the pit. The sludge scraper 3 should be fixed as stably as possible below the crossbeam 2 to avoid shaking. The filter cylinder 4 extends into the sludge scraper cylinder 3 and slides inside the sludge scraper cylinder 3. A closed top plate 5 is fixedly installed on the top of the filter cylinder 4 to seal the top of the filter cylinder 4, so as to ensure the overall structure of the filter cylinder 4 is sealed and to prevent water carrying mud from entering from the top of the filter cylinder 4. A mud discharge port 6 is opened at the bottom of the filter cylinder 4, mainly to facilitate the discharge of mud accumulated inside the filter cylinder 4, so as to better filter out water without mud. Drainage pipe 7 extends from one end of the enclosed top plate 5 into the filter cylinder 4, and the other end is connected to the externally installed recycling water tank 8 to store the recycled foundation pit dewatering. The water in the filter cylinder 4 can be pumped out by a water pump and pumped into the recycling water tank 8 to store the recycled foundation pit dewatering for direct reuse, such as reuse within the construction area or reuse for watering work in municipal engineering, or the recycled water can be further treated by sedimentation and filtration to improve its treatment level for other uses, such as car washing, concrete curing, etc. An outer scraping structure is provided inside the scraping cylinder 3 to scrape the mud off the outer surface of the filter cylinder 4 when the filter cylinder 4 moves up and down. The inner scraping structure is located below the cross frame 2 and extends into the filter cylinder 4 to scrape off the mud from the inner surface of the filter cylinder 4 when the filter cylinder 4 is raised and lowered. The lifting drive mechanism is located below the cross frame 2 to drive the filter cylinder 4 to move up and down inside the scraper cylinder 3. When the filter cylinder 4 extends out of the scraper cylinder 3, a large amount of water will enter the filter cylinder 4. The water pressure combined with the suction force of the water pump on the drain pipe 7 will accelerate the water entry into the filter cylinder 4.
[0019] Specifically, driven by the lifting drive mechanism, the filter cylinder 4 moves up and down within the sludge scraper cylinder 3. During this movement, the outer and inner sludge scraping structures scrape away mud from the outer and inner surfaces of the filter cylinder 4, respectively. This ensures efficient water intake into the filter cylinder 4 while directly filtering the mud, thus guaranteeing the pumping efficiency of the drainage pipe. Consequently, this system ensures efficient dewatering and recycling of the foundation pit while simultaneously filtering the mud directly. It also saves a significant amount of subsequent mud removal work, as the mud can be retained in the foundation pit or collection well without further treatment. This effectively improves the efficiency of foundation pit dewatering and recycling.
[0020] Furthermore, fixed connecting rods 9 are provided on both sides of the upper end of the scraper cylinder 3. The upper ends of the fixed connecting rods 9 are fixedly connected to the cross frame 2 to connect and support the scraper cylinder 3 and extend it into the foundation pit. This allows the vertical frame 1 and the cross frame 2 to be configured with an adjustable height structure, so that the support height of the scraper cylinder 3 can be adjusted by adjusting the cross frame 2, thereby adjusting the height of the scraper cylinder 3 extending into the foundation pit.
[0021] Furthermore, the filter cylinder 4 is a mesh filter cylinder structure used to block the mud outside the filter cylinder 4. The water after filtering the mud enters the interior of the filter cylinder 4 and is extracted through the drain pipe 7, so as to realize the direct filtration of mud and pumping of water in the foundation pit or sump.
[0022] Furthermore, the outer scraper structure includes: Inclined scraping protrusion 10 is provided on the inner surface of the scraping cylinder 3. Multiple inclined scraping protrusions 10 are continuously provided from top to bottom and are distributed in a spiral shape inside the scraping cylinder 3. And a bottom scraper ring 11, which is coaxially set at the bottom of the scraper cylinder 3. The inner side of the bottom scraper ring 11 protrudes from the inner surface of the scraper cylinder 3 and has the same protrusion height as the inclined scraper protrusion 10. The outer side of the bottom scraper ring 11 protrudes from the outer surface of the scraper cylinder 3.
[0023] For details, please refer to Figure 3The inclined scraper protrusions 10 are disconnected from each other in the axial direction but are essentially continuous in the radial direction. Therefore, when the filter cylinder 4 moves axially, the inclined scraper protrusions 10 can continuously scrape the mud from the entire outer surface of the filter cylinder 4. At the same time, the inclined scraper protrusions 10 can allow the scraped mud to be discharged from the scraper cylinder 3 along its inclined surface. The bottom scraper ring 11 acts on the filter cylinder 4 in a ring-like position, which can directly scrape the mud and discharge the mud directly to the outside of the scraper cylinder 3 along its inclined structure, especially when the filter cylinder 4 moves upward axially.
[0024] Furthermore, the inner sludge scraping structure includes a central push rod 12. The upper end of the central push rod 12 is fixedly connected to the crossbeam 2, and the lower end extends through the closed top plate 5 into the filter cylinder 4. One end of the central push rod 12 extending into the filter cylinder 4 is provided with an annular sludge scraping structure to scrape the sludge from the inner wall of the filter cylinder 4 downwards for discharge from the sludge outlet 6. The central push rod 12 is fixed in position. During the process of the filter cylinder 4 moving up and down within the sludge scraping cylinder 3 driven by the lifting drive mechanism, the filter cylinder 4 moves axially relative to the annular sludge scraping structure to scrape the sludge adhering to the inner wall of the filter cylinder 4. In particular, during the upward axial movement of the filter cylinder 4, the sludge is concentrated inside the filter cylinder 4, which has a water-blocking effect, and at the same time, the sludge is concentrated and discharged to the outside of the filter cylinder 4.
[0025] Furthermore, the annular scraper structure includes: Support ring 13 is set inside the water filter cylinder 4 and does not contact the inner wall of the water filter cylinder 4. The inner side of the support ring 13 is fixedly supported by a support rod 14 between the inner side of the support ring 13 and the lower end of the central push rod 12. And a sludge scraper ring 15, the upper end of which is coaxially connected to the support ring 13, and the lower end extends outward to the inner wall of the filter cylinder 4 to scrape off the sludge.
[0026] Specifically, both the support ring 13 and the scraper ring 15 are annular structures to prevent water from being pushed out of the filter cylinder 4. The rigid support ring 13 supports the plastic scraper ring 15, which scrapes away the mud adhering to the inner wall of the filter cylinder 4. The plastic scraper ring 15 also prevents damage to the inner wall of the filter cylinder 4. The support rod 14 connects the support ring 13 to the central push rod 12.
[0027] Furthermore, the lifting drive mechanism includes: The first drive rod 16 has one end vertically connected to the upper surface of the closed top plate 5 and the other end extending upward through the cross frame 2. Telescopic cylinder 17 is fixedly mounted on the cross frame 2, with the telescopic end of the telescopic cylinder 17 facing upward and fixedly connected to the upper end of the first drive rod 16. Guide tube 18, which is vertically passed through the cross frame 2 and fixedly connected to the cross frame 2; And the second drive rod 19, one end of which is vertically connected to the upper surface of the closed top plate 5, and the other end is inserted into the guide tube 18 and slides inside the guide tube 18.
[0028] Specifically, the lifting drive mechanism is driven by the telescopic cylinder 17 to lift the first drive rod 16 to move the water filter cylinder 4 up and down. At the same time, the second drive rod 19 slides inside the guide tube 18 to provide auxiliary guidance for the lifting and lowering of the water filter cylinder 4, making the lifting and lowering of the water filter cylinder 4 more stable.
[0029] In summary, when using this device for the recycling of dewatering water from foundation pits, the filter cylinder equipped with a scraper is directly inserted into the foundation pit or sump containing water to filter and collect the water. The water is then pumped through a drain pipe to a recycling tank for direct reuse or re-sedimentation as needed. During the movement of the filter cylinder within the scraper, the outer and inner scraper structures scrape away mud from the outer and inner surfaces of the filter cylinder, respectively. This ensures efficient water intake into the filter cylinder while directly filtering the mud, thus guaranteeing efficient drainage. This approach ensures efficient dewatering and recycling while simultaneously reducing subsequent mud removal work. Furthermore, the mud remains in the foundation pit or sump without further treatment, effectively improving the efficiency of both dewatering and recycling.
[0030] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A device for recovering and utilizing dewatering water from foundation pits, characterized in that, include: The upright frame (1) and the horizontal frame (2) are provided. The upright frame (1) is vertically fixed to the outside of the pit, and the horizontal frame (2) is horizontally set on the upright frame (1) and located above the pit. Scraper cylinder (3), the scraper cylinder (3) is fixedly installed in the vertical direction below the cross frame (2) and extends into the pit; A filter cylinder (4) is inserted into the sludge scraper cylinder (3) and slides inside the sludge scraper cylinder (3). A closed top plate (5) is fixedly installed on the top of the filter cylinder (4) to seal the top of the filter cylinder (4). A sludge discharge port (6) is opened at the bottom of the filter cylinder (4). Drainage pipe (7), one end of which extends from the closed top plate (5) into the filter cylinder (4), and the other end is connected to the externally installed recycling water tank (8) to store the recycled pit dewatering; An outer scraping structure is provided inside the scraping cylinder (3) to scrape the mud off the outer surface of the filter cylinder (4) when the filter cylinder (4) moves up and down. An inner scraping structure is provided below the cross frame (2) and extends into the filter cylinder (4) to scrape the mud from the inner surface of the filter cylinder (4) when the filter cylinder (4) moves up and down. And a lifting drive mechanism, which is located below the cross frame (2) to drive the filter cylinder (4) to move up and down within the sludge scraper cylinder (3).
2. The foundation pit dewatering recovery and utilization device according to claim 1, characterized in that, Fixed connecting rods (9) are provided on both sides of the upper end of the scraper cylinder (3), and the upper end of the fixed connecting rods (9) is fixedly connected to the cross frame (2).
3. The foundation pit dewatering recovery and utilization device according to claim 1, characterized in that, The filter cylinder (4) has a mesh filter cylinder structure to block the mud outside the filter cylinder (4), and the water after filtering the mud enters the filter cylinder (4) and is extracted through the drain pipe (7).
4. The foundation pit dewatering recovery and utilization device according to claim 1, characterized in that, The outer scraping structure includes: Inclined scraper protrusions (10) are provided on the inner surface of the scraper cylinder (3). Multiple inclined scraper protrusions (10) are continuously provided from top to bottom and are distributed in a spiral shape inside the scraper cylinder (3). And a bottom scraper ring (11), which is coaxially disposed at the bottom of the scraper cylinder (3). The inner side of the bottom scraper ring (11) protrudes from the inner surface of the scraper cylinder (3) and has the same protrusion height as the inclined scraper protrusion (10). The outer side of the bottom scraper ring (11) protrudes from the outer surface of the scraper cylinder (3).
5. The foundation pit dewatering recovery and utilization device according to claim 4, characterized in that, The inner sludge scraping structure includes a central push rod (12). The upper end of the central push rod (12) is fixedly connected to the upper and lower ends of the cross frame (2), which pass through the closed top plate (5) and extend into the filter cylinder (4). One end of the central push rod (12) extending into the filter cylinder (4) is provided with an annular sludge scraping structure to scrape the sludge from the inner wall of the filter cylinder (4) downwards and discharge it from the sludge discharge port (6).
6. The foundation pit dewatering recovery and utilization device according to claim 5, characterized in that, The annular scraper structure includes: Support ring (13), the support ring (13) is disposed inside the filter cylinder (4) and does not contact the inner wall of the filter cylinder (4), the inner side of the support ring (13) and the lower end of the central push rod (12) are fixedly supported by a support rod (14); And a mud scraper ring (15), the upper end of which is coaxially connected to the support ring (13), and the lower end extends outward to the inner wall of the filter cylinder (4) to scrape off the mud.
7. The foundation pit dewatering recovery and utilization device according to claim 1, characterized in that, The lifting drive mechanism includes: The first drive rod (16) has one end vertically connected to the upper surface of the closed top plate (5) and the other end extending upward through the cross frame (2); Telescopic cylinder (17), the telescopic cylinder (17) is fixedly mounted on the cross frame (2), the telescopic end of the telescopic cylinder (17) is set upward and fixedly connected to the upper end of the first drive rod (16); Guide tube (18), the guide tube (18) passes vertically through the cross frame (2) and is fixedly connected to the cross frame (2); And a second drive rod (19), one end of which is vertically connected to the upper surface of the closed top plate (5), and the other end is inserted into the guide tube (18) and slides inside the guide tube (18).