A deep well foundation pit dewatering device

Abstract

The application relates to the technical field of deep foundation pit dewatering equipment, and discloses a deep-well foundation pit dewatering device which comprises a compensation box body, a water suction pipe in communication with a water inlet pipe, a sewage pump in communication with a water outlet pipe, two groups of sewage filtering boxes arranged in the compensation box body, and an automatic cleaning assembly arranged between the sewage filtering boxes and the compensation box body. The automatic cleaning assembly comprises two groups of one-way lead screws rotatably connected to the upper sides of the inner cavities of the sewage filtering boxes, filtering plates threadedly connected with the two groups of one-way lead screws, gears rotatably connected to the two sides of the sewage filtering boxes through rotating shafts, conical wheels fixedly sleeved on the outer sides of the one-way lead screws and the outer ends of the rotating shafts and intermeshed with each other, two groups of racks fixedly installed in the compensation box body and meshingly connected with the two groups of gears respectively. The application effectively avoids the manual cleaning of the residue collecting groove after position replacement, and improves the automation degree of the device.

Description

Technical Field

[0001] This invention relates to the field of deep foundation pit dewatering equipment, and more particularly to a deep well foundation pit dewatering device. Background Technology

[0002] Deep foundation pits refer to projects with an excavation depth exceeding 5 meters (including 5 meters), or projects with particularly complex geological conditions, surrounding environment, and underground pipelines even if the depth does not exceed 5 meters. During the construction process, the water level must be lowered to 500mm below the bottom elevation of the foundation pad before excavation of the foundation pit and construction of various processes for the basement can proceed. Therefore, specialized dewatering devices are used to drain the water accumulated in the deep foundation pit to achieve the lowering of the water level.

[0003] Chinese invention patent CN218516212U discloses a tunnel foundation pit drainage device. This device facilitates cleaning of the slag collection trough located at the top of the circular box by rotating and reversing the positions of two slag collection troughs. The cleaning process does not require pausing pumping operations, allowing for the simultaneous cleaning of filtered impurities while pumping water, making it highly practical. Regarding the aforementioned related technology, the inventors believe it has the following drawbacks:

[0004] In actual use, this device requires manual operation by pulling the pull ring to move the iron filter screen outward to push impurities out of the slag collection tank. This is not only troublesome, but also requires operators, which increases the consumption of human resources and reduces the automation of the device. Therefore, we provide a deep well pit dewatering device. Summary of the Invention

[0005] To address the issue in the aforementioned background technology where manual cleaning of the slag collection trough after its position is changed reduces the automation of the device, this invention provides a deep well pit dewatering device.

[0006] The present invention is achieved by the following technical solution: a deep well pit dewatering device, comprising a compensation box, an inlet pipe and an outlet pipe respectively fixedly connected to both sides of the compensation box, a suction pipe connected to the inlet pipe, a sewage pump connected to the outlet pipe, two sets of sewage filter boxes disposed inside the compensation box, and an automatic cleaning component disposed inside the compensation box for cleaning the inner cavity of the sewage filter boxes.

[0007] The automatic cleaning assembly includes two sets of one-way screws rotatably connected to the upper sides of the inner cavity of the sewage filter box, a filter plate threadedly connected to both sets of one-way screws, gears rotatably connected to both sides of the sewage filter box via a rotating shaft, conical wheels fixedly sleeved on the outside of one side of the one-way screws and the outside of one end of the rotating shaft and meshing with each other, and two sets of racks fixedly installed inside the compensation box and meshing with the two sets of gears respectively.

[0008] The compensation box has an inlet and an outlet on its left and right sides, respectively. The inlet and outlet are on the same horizontal line and are located in the middle of the compensation box. The inlet is connected to the suction pipe and the outlet is connected to the outlet pipe.

[0009] The suction pipe is one of the most important parts of the dewatering system. It is responsible for guiding the water accumulated in the deep foundation pit to a suitable drainage outlet. Suction pipes are usually made of corrosion-resistant and pressure-resistant materials, such as PVC pipes or steel pipes.

[0010] Furthermore, in the dewatering system, a sewage pump is used to extract accumulated water from the deep foundation pit. In the prior art, sewage pumps are generally installed at the bottom of the foundation pit, sucking up accumulated water and pushing it towards the drainage pipe. The sewage pump in this application is installed at the outlet pipe, not in contact with the accumulated water in the foundation pit, which reduces the risk of the sewage pump becoming clogged. When the drainage pump is in direct contact with the accumulated water in the foundation pit, the pump may be blocked by silt, sand, or other debris, affecting the drainage effect. Installing the drainage pump on the upper side reduces the possibility of these debris entering the pump, improving its working efficiency. Furthermore, installing the drainage pump on the upper side of the foundation pit facilitates maintenance and cleaning. If the pump malfunctions or needs cleaning, operators can work directly on the ground without having to go down into the foundation pit, reducing the difficulty and risk of operation. In addition, the environment inside the foundation pit is usually harsh, with problems such as corrosion, high temperature, and high humidity. Installing the drainage pump on the upper side of the foundation pit reduces the pump's contact with these harsh environments, extending the pump's service life. At the same time, installing the drainage pump on the upper side of the foundation pit improves the safety of the construction site. The pump is located above ground, making it easy to monitor and manage. At the same time, it provides workers with more space to move around inside the pit, reducing the risk of accidental injuries.

[0011] In addition, the compensation tank acts as a filter, removing impurities, silt, and small particles from the water pumped up by the dewatering device. This filtration prevents these impurities from entering the drainage pipes and pumps, reducing the risk of blockages and improving the stability and reliability of the drainage system. Furthermore, the compensation tank is typically designed with a well-sealed structure, which, combined with its filtration function, effectively prevents foul odors from the water in the pit from spreading to the surrounding environment. This provides a better working environment and reduces the impact on the construction site's surroundings. Moreover, the compensation tank is usually designed with an openable structure for easy cleaning and maintenance. When excessive impurities accumulate inside the compensation tank, the cover can be opened for cleaning. This helps maintain the compensation tank in good working condition and extends the service life of the dewatering device.

[0012] In addition, the wastewater filter box inside the compensation tank is equipped with a filter plate. This filter plate moves horizontally via a rack and pinion mechanism, allowing residual impurities inside the tank to be removed from the drain outlet. During the cleaning process, the inlet pipe stops supplying water to prevent wastewater from entering the compensation tank. The horizontally movable filter plate prevents blockage of the drain outlet. When impurities accumulate on the filter plate, the horizontal movement removes them, preventing blockage and ensuring unobstructed drainage. This ensures the filter plate inside the compensation tank remains clean, preventing impurities from affecting the filtration effect. Regularly removing residual impurities improves the efficiency and stability of the drainage system. The horizontally movable filter plate also makes maintenance more convenient. When the filter plate needs cleaning or replacement, it can be moved to the drain outlet and removed for cleaning or replacement. This reduces maintenance time and workload, improving operational efficiency.

[0013] Furthermore, the wastewater filter box and its internal filter plates are equipped with two sets, which are used alternately to achieve continuous filtration. After a period of use, impurities may accumulate in one set of filter plates, affecting the filtration effect. At this time, the filter plate in that set can be replaced by moving the rack and pinion mechanism, while the other set of filter plates is activated. This ensures the continuous effectiveness of the compensation box's filtration function and guarantees the stability of the wastewater quality. Alternating the use of two sets of filter plates reduces downtime. When filter plates need to be replaced, the system can directly switch to the other set that is already prepared, without waiting for cleaning and maintenance to complete. This improves the continuity and stability of the drainage system and avoids downtime due to maintenance. Because the filter plates are used alternately, the lifespan of each set is relatively extended. This means that the frequency of cleaning or replacement of each set of filter plates is reduced, thus extending the overall lifespan of the filter plates. This not only reduces the number of maintenance operations but also lowers maintenance costs and workload. Alternating the use of two sets of filter plates improves system stability. Even while cleaning or replacing filter plates, the other set of filter plates can continue to operate, maintaining the normal operation of the drainage system. This avoids drainage system interruptions due to filter plate maintenance, ensuring that accumulated water in the pit is treated promptly and effectively.

[0014] Furthermore, the two sets of sewage filter boxes inside the compensation tank of this application adopt a vertical alternation method. Compared with the rotary alternation method used in the prior art, the vertical alternation method only requires two sets of sewage filter boxes, which are moved up and down to achieve alternating use. The movement distance of the two sets of sewage filter boxes is limited to their own set range, that is, the sewage filter box above will not move to the area where the sewage filter box below is located, thus greatly reducing the movement stroke. Moreover, the vertical alternation method only uses a one-way lead screw and gear structure, while the rotary alternation method in the prior art uses a complex rotating structure, including bearings, transmission devices, etc., which increases the complexity of design and manufacturing. In addition, the vertical alternation method is relatively simple to operate. It only requires moving the filter plate up and down, without the need for complex rotation operations. This makes operation more convenient and reduces the difficulty and risk for maintenance personnel. In addition, due to the simple structure of the vertical alternation method, the maintenance cost is relatively low. The maintenance of the filter plate is mainly cleaning or replacement, while the vertical alternation method only requires moving the filter plate, without involving complex rotation structures, reducing maintenance time and costs. Furthermore, since there is no rotating structure, the vertical alternation method is relatively more stable and durable. Rotary structures are susceptible to friction and wear, while vertical alternating structures are less prone to these problems, thus extending the service life of the filter plates.

[0015] As a further improvement to the above solution, a stepper motor is fixedly installed on the top of the compensation box, and a rotating rod is fixedly connected to the end of the rotor of the stepper motor. Gear plates are fixedly sleeved on both sides of the rotating rod. Gear plates are symmetrically fixedly installed on the top of the upper sewage filter box and mesh with the two sets of gear plates respectively, so as to facilitate the vertical movement of the sewage filter box for replacement.

[0016] A stepper motor is a special type of motor that converts electrical pulse signals into mechanical rotation, driving a mechanical device in a step-by-step manner. A stepper motor consists of an electromagnetic coil and rotating magnetic poles; it rotates by continuously applying current. Stepper motors are open-loop controlled and do not require a feedback system. This makes stepper motor control simpler and more reliable. Furthermore, the simple structure of a stepper motor, without brushes or a commutator, reduces the likelihood of malfunctions and maintenance.

[0017] Stepper motors are used to power the alternating process of wastewater filter cartridges. By controlling the number and frequency of electrical pulses, the rotation angle and speed can be precisely controlled. Each pulse causes the motor to rotate by a fixed step angle, thus enabling very precise position and motion control of the wastewater filter cartridges. Furthermore, stepper motors can provide high torque even at low speeds. This makes them ideal for applications requiring high loads or low-speed operation, such as the stepping operation during filter plate alternation. Stepper motors also consume energy only when needed, as they only rotate when they receive an electrical pulse. In contrast, traditional DC or AC motors continuously consume energy during operation. Additionally, stepper motors are small, lightweight, and easy to install. They typically have high power density, providing powerful performance within limited space.

[0018] As a further improvement to the above solution, a slot is provided on the top of the compensation box corresponding to the position of the toothed plate, which allows the toothed plate to move vertically, thus facilitating the vertical movement of the toothed plate.

[0019] As a further improvement to the above solution, guide rods are symmetrically fixedly installed inside the compensation box, and guide blocks are symmetrically fixedly installed on both sides of the sewage filter box and slidably connected to the guide rods, which can guide the vertical movement of the sewage filter box.

[0020] As a further improvement to the above solution, through holes are provided on both sides of the sewage filter box. The size of the through holes is consistent with the cross-sectional area of ​​the inlet pipe and the outlet pipe, which can ensure that sewage flows in and out smoothly.

[0021] As a further improvement to the above solution, drain ports are provided above and below the water inlet of the compensation tank to facilitate the discharge of filtered impurities.

[0022] As a further improvement to the above solution, the area of ​​the filter plate is matched with the cross-sectional area of ​​the sewage filter box, which facilitates thorough filtration of sewage and complete removal of filtered impurities from the sewage filter box.

[0023] As a further improvement to the above scheme, two unidirectional screws (101) are provided, located at the upper and lower parts of the inlet of the compensation box (1) respectively. The thread directions of the upper and lower unidirectional screws are set in opposite directions, which facilitates the movement of the two sets of filter plates in opposite directions.

[0024] As a further improvement to the above solution, a connecting block is symmetrically fixed between the two sets of sewage filter boxes, which facilitates the simultaneous movement of the two sets of sewage filter boxes.

[0025] As a further improvement to the above solution, sealing gaskets are added to both inner walls of the compensation box to provide a sealing effect and prevent sewage from the sewage filter box from leaking into the compensation box.

[0026] The sealing gasket can be made of various materials, such as rubber, polyurethane, polytetrafluoroethylene, and polyester film. Its primary function is to prevent sewage from leaking out of the compensation tank. The gasket fits tightly against the joints of the compensation tank, preventing sewage from leaking through seams or holes and maintaining the tank's airtightness. This prevents environmental pollution and health problems caused by sewage leaks. The gasket ensures that sewage within the compensation tank flows smoothly into the drainage system. The tight connection of the gasket reduces leakage and resistance, allowing sewage to flow smoothly through the compensation tank and quickly into the drainage pipes, improving drainage efficiency. The use of the gasket enhances the safety of the compensation tank. By preventing sewage leaks, the gasket reduces the risk of slips and falls, providing a safe working environment. Simultaneously, the gasket prevents sewage from seeping into surrounding buildings or underground structures, protecting the surrounding environment.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. This invention uses a stepper motor to drive a toothed disc to rotate in both directions in a regular manner. By utilizing the meshing action between the toothed disc and the toothed plate, two sets of sewage filter boxes can be moved vertically at the same time to achieve the purpose of replacing the sewage filter boxes. By replacing the rotational movement with vertical movement, the movement path of the sewage filter boxes is shortened, thereby reducing the time spent on replacement and making it highly practical.

[0029] 2. While the wastewater filter box moves vertically, the present invention utilizes the meshing of gears and racks, as well as the meshing of conical wheels, to drive two sets of one-way screws in the wastewater filter box to rotate simultaneously. The rotation of the one-way screws drives the filter plate to move horizontally, thereby facilitating the discharge of impurities from the replaced wastewater filter box through the drain outlet. This achieves the purpose of automatic cleaning of the device and effectively avoids the need for manual cleaning of the sludge collection tank after the position is changed, which reduces the automation of the device. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0031] Figure 2 This is a schematic diagram of the longitudinal section of the compensation box of the present invention.

[0032] Figure 3 This is a longitudinal sectional three-dimensional structural diagram of the wastewater filter box of the present invention.

[0033] Explanation of key symbols:

[0034] 1. Compensation box; 2. Suction pipe; 3. Sewage pump; 4. Sewage filter box; 5. Stepper motor; 6. Gear plate; 7. Gear plate; 8. Guide rod; 9. Guide block; 10. Sewage outlet; 11. Connecting block; 101. One-way lead screw; 102. Filter plate; 103. Gear; 104. Conical wheel; 105. Rack. Detailed Implementation

[0035] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0036] Example 1:

[0037] Please combine Figure 1-3 This embodiment of a deep well pit dewatering device includes a compensation box 1, an inlet pipe and an outlet pipe fixedly connected to both sides of the compensation box 1, a suction pipe 2 connected to the inlet pipe, a sewage pump 3 connected to the outlet pipe, two sets of sewage filter boxes 4 disposed inside the compensation box 1, and an automatic cleaning assembly disposed between the sewage filter boxes 4 and the compensation box 1. A stepper motor 5 is fixedly installed on the top of the compensation box 1. A rotating rod is fixedly connected to the end of the rotor of the stepper motor 5. Gear plates 6 are fixedly sleeved on both sides of the rotating rod. Gear plates 7 are symmetrically fixedly installed on the top of the upper sewage filter box 4 and respectively mesh with the two sets of gear plates 6. The top of the lower sewage filter box 4 is fixedly connected to the bottom of the upper sewage filter box 4. When the stepper motor 5 rotates, the gear plates 7 are driven to move up and down through the gear plates 6 to facilitate the operation of the filter box 4. The wastewater filter box 4 is moved vertically for replacement. The top of the compensation box 1 has a slot corresponding to the position of the toothed plate 7, which allows the toothed plate 7 to move vertically. The compensation box 1 has guide rods 8 symmetrically fixedly installed inside. The wastewater filter box 4 has guide blocks 9 symmetrically fixedly installed on both sides and slidably connected to the guide rods 8, which can guide the vertical movement of the wastewater filter box 4. Both sides of the wastewater filter box 4 have through holes, the size of which is consistent with the cross-sectional area of ​​the inlet and outlet pipes, which can ensure the smooth flow of wastewater in and out. The compensation box 1 has drain ports 10 above and below the inlet to facilitate the discharge of filtered impurities. The two sets of wastewater filter boxes 4 are symmetrically fixedly connected by connecting blocks 11, which can facilitate the simultaneous movement of the two sets of wastewater filter boxes 4.

[0038] The automatic cleaning assembly includes two sets of one-way screws 101 rotatably connected to the upper sides of the inner cavity of the sewage filter box 4, filter plates 102 threadedly connected to the two sets of one-way screws 101, gears 103 rotatably connected to the two sides of the sewage filter box 4 via a rotating shaft, conical wheels 104 fixedly sleeved on the outside of one side of the one-way screws 101 and the outside of one end of the rotating shaft and meshing with each other, and two sets of racks 105 fixedly installed inside the compensation box 1 and meshing with the two sets of gears 103 respectively. The area of ​​the filter plates 102 matches the cross-sectional area of ​​the sewage filter box 4, which facilitates thorough filtration of sewage and complete ejection of filtered impurities from the sewage filter box 4. The thread directions of the upper and lower one-way screws 101 are opposite, which facilitates the movement of the two sets of filter plates 102 in opposite directions.

[0039] The implementation principle of a deep well pit dewatering device in this application embodiment is as follows: The suction pipe 2 is placed in the deep pit water. The sewage pump 3 is started to pump out the sewage from the deep pit. The sewage enters the sewage filter box 4 through the suction pipe 2 and is filtered by the filter plate 102 before being discharged. The filtered impurities remain in the sewage filter box 4. The stepper motor 5 is started, which drives the gear plate 6 to rotate in both directions regularly. The meshing of the gear plate 6 and the gear 7 drives the two sets of sewage filter boxes 4 to move vertically simultaneously, achieving the purpose of replacing the sewage filter boxes 4. Vertical movement replaces rotary movement, shortening the movement path of the sewage filter boxes 4 and reducing the time spent on replacement. Simultaneously, during the vertical movement of the sewage filter boxes 4, the meshing of the gear 103 and rack 105, as well as the meshing of the conical wheel 104, drives the two sets of one-way screws 101 in the sewage filter box 4 to rotate simultaneously. 1. Rotation drives the filter plate 102 to move horizontally, facilitating the removal of impurities from the replaced wastewater filter box 4 through the drain port 10, thus achieving automatic cleaning. When the stepper motor 5 drives the wastewater filter box 4 to move vertically downward, the filter plate 102 in the lower wastewater filter box 4 moves outward to push out impurities. When the stepper motor 5 stops rotating, the filter plate 102 in the lower wastewater filter box 4 is positioned at the through hole of the wastewater filter box 4, and the through hole is aligned with the drain port 10. When the stepper motor 5 drives the sewage filter box 4 to move vertically upward, the filter plate 102 in the lower sewage filter box 4 will move inward, and the filter plate 102 in the upper sewage filter box 4 will move outward. When the stepper motor 5 stops rotating, the filter plate 102 in the upper sewage filter box 4 will just move to the through hole of the sewage filter box 4 and the through hole will be connected to the sewage outlet 10, while the filter plate 102 in the lower sewage filter box 4 will just be reset and the through hole will just be connected to the inlet and outlet.

[0040] Example 2:

[0041] Based on Embodiment 1, this embodiment is further improved in that: sealing gaskets are added to both inner walls of the compensation box 1 to seal and prevent sewage from the sewage filter box 4 from leaking into the compensation box 1.

[0042] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A deep well pit dewatering device, characterized in that, Includes a compensation box (1), an inlet pipe and an outlet pipe fixedly connected to both sides of the compensation box (1), a suction pipe (2) connected to the inlet pipe, a sewage pump (3) connected to the outlet pipe, two sets of sewage filter boxes (4) set inside the compensation box (1), and an automatic cleaning component set inside the compensation box (1) for cleaning the inner cavity of the sewage filter box (4); The automatic cleaning assembly includes two sets of one-way screws (101) rotatably connected to the upper sides of the inner cavity of the sewage filter box (4), a filter plate (102) threadedly connected to both sets of one-way screws (101), gears (103) rotatably connected to both sides of the sewage filter box (4) via a rotating shaft, a conical wheel (104) fixedly sleeved on the outside of one side of the one-way screw (101) and the outside of one end of the rotating shaft and meshing with each other, and two sets of racks (105) fixedly installed inside the compensation box (1) and meshing with the two sets of gears (103) respectively. A stepper motor (5) is fixedly installed on the top of the compensation box (1). A rotating rod is fixedly connected to the rotor end of the stepper motor (5). A toothed disc (6) is fixedly sleeved on both sides of the rotating rod. A toothed plate (7) is symmetrically fixedly installed on the top of the upper sewage filter box (4) and meshes with the two sets of toothed discs (6) respectively. A slot is opened on the top of the compensation box (1) corresponding to the position of the toothed plate (7) so that the toothed plate (7) can move vertically. Two one-way screws (101) are provided, located at the upper and lower parts of the inlet of the compensation box (1) respectively, and the thread directions of the one-way screws (101) at the upper and lower parts are opposite; connecting blocks (11) are symmetrically fixedly connected between the two sets of sewage filter boxes (4).

2. The deep well pit dewatering device as described in claim 1, characterized in that, The compensation box (1) is symmetrically fixedly installed with guide rods (8) inside, and the sewage filter box (4) is symmetrically fixedly installed with guide blocks (9) on both sides outside and slidably connected with the guide rods (8).

3. The deep well pit dewatering device as described in claim 1, characterized in that, Both sides of the wastewater filter box (4) are provided with through holes, and the size of the through holes is consistent with the cross-sectional area of ​​the inlet pipe and the outlet pipe.

4. The deep well pit dewatering device as described in claim 1, characterized in that, The compensation tank (1) has drain outlets (10) above and below the water inlet.

5. A deep well pit dewatering device as described in claim 1, characterized in that, The area of ​​the filter plate (102) is matched with the cross-sectional area of ​​the sewage filter box (4).

6. A deep well pit dewatering device as described in claim 1, characterized in that, Sealing gaskets are added to both inner walls of the compensation box (1).

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