A self-induction water pumping device for deep foundation pit dewatering

Abstract

The application discloses a deep foundation pit dewatering self-induction water pumping device and relates to the field of foundation pit dewatering.The device comprises a shell, wherein the shell comprises a well wall pipe provided with water seepage holes on a side wall, a cone head is fixedly installed at the bottom of the well wall pipe, a storage cavity is arranged in the cone head, and a conical frustum is fixedly installed at the top of the well wall pipe; a filter inner container is arranged in the well wall pipe and coaxial with the well wall pipe, and comprises an installation cylinder and a filter part sleeved on the outer wall of the installation cylinder; the filter net hole size is dynamically adjusted through the flexible filter net along with the back flushing and water pumping process, the filter net is cleaned without dead angle through cooperation of the spiral back flushing water flow, the filtering and back flushing efficiency is greatly improved, the water inlet at the top of the sealing device, the water seepage holes of the well wall and the sewage inlet of the cone head are simultaneously blocked during back flushing, backflow of the back flushing sewage to the soil layer or overflow of the back flushing sewage to the foundation pit is completely avoided, and the dryness of the foundation pit and the stability of the soil layer are ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of foundation pit dewatering, and particularly relates to a deep foundation pit dewatering self-induction water pumping device. BACKGROUND

[0002] In building engineering, municipal engineering (such as subway tunnel, underground pipe gallery) and large-scale industrial facility construction, deep foundation pit construction needs to reduce the underground water level below the foundation pit bottom surface through dewatering technology to avoid safety accidents such as sidewall collapse and piping and guarantee construction efficiency.

[0003] At present, the main pipe well point dewatering system is the core technical means of deep foundation pit dewatering, but the defects of the system in filtering and cleaning and controlling sewage backflow have become the core bottleneck of restricting dewatering efficiency and foundation pit safety, and the specific problems are as follows:

[0004] The deep foundation pit seepage contains a large amount of silt, gravel and construction impurities, and the existing pipe well device adopts a fixed aperture filter screen to separate the mud and water, and lacks a dynamic adjustment and efficient cleaning mechanism:

[0005] After long-term use of the filter screen, impurities are easily attached to the filter screen to form a blocking layer, which leads to a sharp decrease in seepage rate and a large decrease in water pumping efficiency, and if the blocking filter screen is not cleaned in time, it cannot quickly drain water in rainy weather, which easily causes short-term water accumulation in the foundation pit.

[0006] During the backflow process, sewage carrying a large amount of impurities is easily backflowed to the surrounding soil layer through the seepage return of the pipe well sidewall, which leads to the re-saturation of the already dewatered soil layer, weakens the dewatering effect, softens the soil layer structure and reduces the stability of the foundation pit sidewall; at the same time, part of the backflow sewage directly overflows into the foundation pit, needs to be additionally started to be pumped and drained for treatment, increases construction cost, and if the sewage seeps into the foundation bottom, it will also cause the mechanical properties of the foundation bottom soil to decrease, cause the foundation bottom to rise, seriously threatens construction safety.

[0007] In view of the above problems, a deep foundation pit dewatering self-induction water pumping device is provided. SUMMARY

[0008] The technical problem to be solved by the application is to overcome the deficiencies of the prior art, and provide a deep foundation pit dewatering self-induction water pumping device which can overcome the above problems or at least partially solve the above problems.

[0009] To solve the above technical problems, the basic idea of the technical scheme of the application is:

[0010] The utility model provides a kind of deep foundation pit precipitation self-induction pumping device, including: shell, the well wall pipe with water seepage hole on the side wall of the shell, the bottom of the well wall pipe is fixedly installed with cone head, the cone head is provided with storage cavity, the top of the well wall pipe is fixedly installed with cone platform;Filtering liner, the filtering liner includes installation cylinder being arranged in well wall pipe and being coaxial with well wall pipe and filtering portion being sleeved on the outer wall of installation cylinder;The top of the installation cylinder is fixedly installed with sealing block, the sealing block is fixedly installed with pumping pipe extending to installation cylinder and blow-off pipe extending to storage cavity;Driving assembly is arranged on the installation cylinder;Backflushing blocking assembly is arranged in shell, when the internal water pressure of the driving assembly increases, the driving assembly drives blocking assembly to block shell, when the internal water pressure of the driving assembly decreases, the elastic member in the driving assembly drives blocking assembly to reset.

[0011] As a preferred embodiment of the utility model: the shell further includes cone platform fixedly installed on the top of the well wall pipe;The outer wall of the cone platform is fixedly installed with first soil-breaking block, the outer wall of the cone head is fixedly installed with second soil-breaking block, the maximum diameter of the cone head and the cone platform is greater than the diameter of the well wall pipe, and the top of the cone platform is fixedly installed with handle.

[0012] As a preferred embodiment of the utility model: the cone wall of the cone head is provided with pollution inlet, the bottom of the storage cavity is provided as recess, the barrel wall of the installation cylinder is provided with water inlet, the inner side of the storage cavity is fixedly installed with arc-shaped first connecting block, the installation cylinder is fixedly connected with the first connecting block, the bottom of the installation cylinder is provided with upwardly recessed converging groove, and the water inlet end of the pumping pipe bottom and the water inlet end of the blow-off pipe bottom are provided with check valve.

[0013] As a preferred embodiment of the utility model: the driving assembly includes installation sleeve fixedly installed on the top of the installation cylinder, the side wall of the installation sleeve is provided with first sliding groove, the first sliding groove is slidably installed with sealing sliding block, the sealing sliding block extending to installation sleeve is fixedly installed with piston plate, the bottom of the piston plate is fixedly installed with drain pipe, the drain pipe is provided with pressure control valve, the outer side of the sealing sliding block extending to installation sleeve is fixedly installed with sliding sealing ring, the top of the installation sleeve is fixedly installed with clean water pipe, and the water inlet end of the clean water pipe is connected with high-pressure water pump outside foundation pit.

[0014] As one preferred embodiment of the present application: the plugging assembly comprises a plugging head, a mounting rack is fixedly installed on the inner wall of the well wall pipe, a second sliding groove is arranged on the mounting rack, a mounting plate is slidingly installed in the second sliding groove, a guide column is fixedly installed on the mounting rack, the mounting plate is slidingly connected with the guide column, the plugging head is fixedly installed on the mounting plate, a connecting rod is slidingly installed on the mounting rack, one end of the connecting rod is fixedly connected with the mounting plate, the other end of the connecting rod is fixedly installed with a second wedge-shaped block, and the bottom of the sliding sealing ring is provided with a pushing assembly for driving the second wedge-shaped block to slide.

[0015] As one preferred embodiment of the present application: the pushing assembly comprises a driving sleeve fixedly installed at the bottom of the sliding sealing ring, a first wedge-shaped block is fixedly installed on the side wall of the driving sleeve, an elastic member is sleeved on the guide column, and the two sides of the elastic member are respectively in abutment with the mounting plate and the inner wall of the well wall pipe.

[0016] As one preferred embodiment of the present application: the plugging assembly further comprises a plugging cover, a hinge seat is fixedly installed on the inner wall of the tapered head, the plugging cover is rotationally arranged on the hinge seat, and the plugging cover is semispherical, when the sliding sealing ring descends, the mounting plate is in abutment with the outer wall of the plugging cover.

[0017] As one preferred embodiment of the present application: the filtering part comprises a flexible filter screen, a fixed ring and a sliding ring are fixedly installed at the two ends of the filter screen respectively, the fixed ring is fixedly installed at the bottom of the side wall of the mounting cylinder, the sliding ring is slidingly installed at the top of the side wall of the mounting cylinder, a second connecting block is fixedly installed at the top of the sliding ring, and the second connecting block is fixedly connected with the side wall of the first wedge-shaped block.

[0018] As one preferred embodiment of the present application: a shunt disc is fixedly installed in the mounting sleeve, an arc-shaped water spraying groove is arranged in the shunt disc, in use, high-pressure clean water enters the shunt disc and is sprayed to the inner wall of the mounting cylinder and the filter screen in spiral water flow through the guidance of the arc-shaped water spraying groove.

[0019] As one preferred embodiment of the present application: a first water level probe is fixedly installed at the bottom of the shunt disc, and a second water level probe is fixedly installed at the bottom of the inner wall of the side wall of the mounting cylinder.

[0020] Compared with the prior art, the present application has the following beneficial effects: the flexible filter screen dynamically adjusts the mesh size according to the backwashing and water pumping process, and cooperates with the spiral backwashing water flow to realize the cleaning of the filter screen without dead angle, greatly improving the filtering and backwashing efficiency; at the same time, the water inlet at the top of the device, the seepage hole of the well wall and the pollution inlet of the cone can be simultaneously blocked during backwashing, completely avoiding the backflow of backwashing sewage to the soil layer or overflow to the foundation pit, ensuring the dryness of the foundation pit and the stability of the soil layer; the water pump can be automatically controlled by the double water level probes, without manual attendance, and the device can be quickly buried with the help of the excavator, without disassembly, and the sewage maintenance can be completed, significantly reducing the labor and construction cost, and improving the safety, stability and economy of the deep foundation pit dewatering as a whole.

[0021] The specific embodiments of the present application will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] In the drawings:

[0023] Figure 1 A perspective view of a deep foundation pit dewatering self-induction water pumping device is provided for the present application;

[0024] Figure 2 A main sectional view of a deep foundation pit dewatering self-induction water pumping device is provided for the present application;

[0025] Figure 3 A structural schematic diagram of a driving assembly of a deep foundation pit dewatering self-induction water pumping device is provided for the present application;

[0026] Figure 4 A structural schematic diagram of a sealing assembly of a deep foundation pit dewatering self-induction water pumping device is provided for the present application Figure 1 ;

[0027] Figure 5 A structural schematic diagram of A in the middle is provided for the present application; Figure 4

[0028] Figure 6 A structural schematic diagram of a mounting cylinder of a deep foundation pit dewatering self-induction water pumping device is provided for the present application;

[0029] Figure 7 A structural schematic diagram of a sealing assembly of a deep foundation pit dewatering self-induction water pumping device is provided for the present application Figure 2 ;

[0030] Figure 8 A structural schematic diagram of a pushing assembly of a deep foundation pit dewatering self-induction water pumping device is provided for the present application;

[0031] Figure 9 A structural schematic diagram of a filtering part of a deep foundation pit dewatering self-induction water pumping device is provided for the present application; ​

[0032] Figure 10 A cross-sectional view of a shell of a deep foundation dewatering self-induction water pumping device according to the present application is provided.

[0033] Figure 11 A structure schematic view of a flow distribution disc of a deep foundation dewatering self-induction water pumping device according to the present application is provided.

[0034] In the figure: 1, well wall pipe; 11, cone head; 12, conical platform; 13, first soil breaking block; 14, second soil breaking block; 15, water seepage hole; 16, sewage inlet hole; 17, handle; 18, first connecting block; 19, storage cavity; 2, mounting cylinder; 21, water inlet hole; 22, mounting sleeve; 23, first sliding chute; 3, pushing assembly; 31, driving sleeve; 32, sliding sealing ring; 33, piston plate; 34, sealing sliding block; 35, first wedge-shaped block; 4, mounting frame; 41, guide column; 42, second sliding chute; 5, mounting plate; 51, connecting rod; 52, plugging head; 53, second wedge-shaped block; 54, elastic member; 6, hinged seat; 61, plugging cover; 7, filtering part; 71, sliding ring; 72, fixed ring; 73, filter screen; 74, second connecting block; 8, sealing block; 81, water pumping pipe; 9, clean water pipe; 91, drainage pipe; 92, sewage discharge pipe; 93, flow distribution disc; 931, arc-shaped water spraying groove; 10, first water level probe; 101, second water level probe. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but not to limit the scope of the present application.

[0036] Embodiment: refer to Figures 1-11 A deep foundation dewatering self-induction water pumping device, comprising a shell, the shell comprising a well wall pipe 1 provided with a water seepage hole 15 on a side wall, a cone head 11 fixedly installed at the bottom of the well wall pipe 1, a conical platform 12 fixedly installed at the top of the well wall pipe 1, a first soil breaking block 13 fixedly installed on the outer wall of the conical platform 12, a second soil breaking block 14 fixedly installed on the outer wall of the cone head 11, the maximum diameters of the cone head 11 and the conical platform 12 being greater than the diameter of the well wall pipe 1, and a handle 17 fixedly installed at the top of the conical platform 12.

[0037] Among them, the diameter of the upper end surface of the conical platform 12 is greater than that of the lower end surface, the cross section of the cone head 11 is pentagonal, a sewage inlet hole 16 is arranged on the conical wall of the cone head 11, a storage cavity 19 is arranged in the cone head 11, and the bottom of the storage cavity 19 is provided as a downwardly recessed groove.

[0038] In use, the shell is erected in the low-lying place of the foundation pit or in the middle of the foundation pit, and then the handle 17 is pressed by the bucket of the excavator to press the shell into the interior of the foundation pit until the frustum 12 contacts the pit surface. In the normal foundation pit excavation process, the soil around the device can be excavated in priority, and a safety range (a soil layer 20-30 cm away from the outer wall of the device) is reserved. After the soil outside the safety range is excavated, the handle 17 is pressed by the bucket of the excavator. In the pressing process, the first soil breaking block 13, the second soil breaking block 14, the frustum 12 and the cone head 11 extrude the soil in the safety range, and the soil in the safety range is broken after being extruded, completing the final treatment of the soil around the device. At the same time, the device continues to descend until the height of the frustum 12 is again within the water level safety range inside the foundation pit, so as to drain water in rainy weather and when water accumulates inside the foundation pit.

[0039] Referring to Figures 2-4 、 Figure 6 、 Figure 9 and Figure 10 , the filter inner container further comprises a mounting cylinder 2 arranged in the well wall pipe 1 coaxially with the well wall pipe 1 and a filter part 7 sleeved on the outer wall of the mounting cylinder 2. The cylinder wall of the mounting cylinder 2 is provided with a water inlet hole 21, and the inner side of a storage cavity 19 is fixedly installed with an arc-shaped first connecting block 18. The mounting cylinder 2 is fixedly connected with the first connecting block 18. The bottom of the mounting cylinder 2 is provided with an upwardly recessed flow converging groove, and the top of the mounting cylinder 2 is fixedly installed with a sealing block 8. The sealing block 8 is fixedly installed with a water pumping pipe 81 extending into the mounting cylinder 2 and a sewage discharge pipe 92 extending into the storage cavity 19. The water pumping pipe 81 is connected with a water pumping pump outside the foundation pit through a pipeline, and the sewage discharge pipe 92 is connected with a water collecting pool (or a water collecting tank or other water collecting equipment) outside the foundation pit through a pipeline.

[0040] The water inlet end of the bottom of the water pumping pipe 81 and the water inlet end of the bottom of the sewage discharge pipe 92 are both provided with a check valve to prevent the filtered water and sewage from flowing backward.

[0041] In use, the clear water in the shell or the water in the soil layer inside the shell is filtered by the filter part 7 after penetrating into the shell through the water permeable hole 15, and then enters the inner side of the mounting cylinder 2. The external water pumping pump then pumps out the filtered water through the water pumping pipe 81.

[0042] The device can filter the clear water in the foundation pit entering through the top of the shell and the soil seepage water entering through the seepage hole 15 with high efficiency, intercept the soil and impurities in the water, prevent the soil and impurities from entering the inside of the installation cylinder 2, ensure the cleanliness of the water drawn out by the water pump 81, prevent the impurities from blocking the water pump 81 and the water pump 81, and effectively prolong the service life of the water pump and the water pump 81. On the other hand, the water pump 81 extending into the installation cylinder 2 and the sewage pipe 92 extending into the storage cavity 19 of the sealing block 8 make the water pumping and sewage channels independent of each other. The filtered clean water can be quickly discharged from the foundation pit by the water pump 81, and the impurities generated by the filtration and the silt entering the storage cavity 19 through the sewage inlet 16 can be discharged to the external water collecting tank through the sewage pipe 92, without disassembling the device to complete the sewage discharge, simplifying the maintenance process.

[0043] Referring to Figure 2 、 Figure 6 and Figure 8 , the top of the installation cylinder 2 is fixedly installed with an installation sleeve 22, a first sliding groove 23 is arranged on the side wall of the installation sleeve 22, a sealing sliding block 34 is slidably installed in the first sliding groove 23, the sealing sliding block 34 is fixedly installed with a piston plate 33 extending into the installation sleeve 22, the sealing sliding block 34 is fixedly installed with a sliding sealing ring 32 extending to the outside of the installation sleeve 22, the top of the installation sleeve 22 is fixedly installed with a clean water pipe 9, the water inlet end of the clean water pipe 9 is connected with a high-pressure water pump outside the foundation pit, the high-pressure water pump is connected with a clean water source such as tap water, the bottom of the piston plate 33 is fixedly installed with a drain pipe 91, and the drain pipe 91 is provided with a pressure control valve.

[0044] In use, the high-pressure water pump sends water to the water cavity composed of the piston plate 33, the installation sleeve 22, the sliding sealing ring 32 and the sealing block 8 through the clean water pipe 9. Under the action of water pressure, the piston plate 33 drives the sliding sealing ring 32 to descend, blocking the water inlet between the top of the conical table 12 and the top of the installation sleeve 22. When the water pressure in the water cavity reaches the preset value of the pressure control valve, the water enters the inside of the installation cylinder 2 through the drain pipe 91, and then back-flushes the filter part 7. The water after back-flushing the filter part 7 impacts the silt in the storage cavity 19 along the inclined wall and the arc-shaped wall of the conical head 11, and then enters the sewage pipe 92 along the flow guide groove, discharging the silt and other impurities along the sewage pipe 92.

[0045] In summary, on the one hand, the device can send water to the specific water cavity through the high-pressure water pump through the water pipe 9, drive the piston plate 33 to drive the sliding sealing ring 32 to descend by water pressure, and accurately block the water inlet between the top of the conical table 12 and the top of the mounting sleeve 22, avoid the mixing of external impurities or unfiltered water into the inside of the mounting cylinder 2 during backwashing, and also form a sealing barrier to prevent the accumulated water generated during backwashing from overflowing from the water inlet and entering the foundation pit, avoiding the additional burden of the foundation pit due to backwashing operation; on the other hand, when the water pressure of the water cavity reaches the preset value of the pressure control valve, the water enters the inside of the mounting cylinder 2 through the drain pipe 91 to backwash the filter part 7, which can effectively remove the attached silt and impurities on the filter part 7, restore the filtering efficiency of the filter part 7, and avoid the decrease of water pumping and drainage effect due to the blockage of the filter part 7; on the other hand, the water after backwashing the filter part 7 can impact the silt in the storage cavity 19 along the inclined wall and the arc-shaped wall of the storage cavity 19, and then be guided into the drain pipe 92 to be discharged, which not only realizes the reasonable flow guide of backwashing wastewater, but also synchronously cleans the deposited impurities in the storage cavity 19, without disassembling the device to complete the cleaning of the filter part 7 and the discharge of impurities, further simplifying the maintenance operation and ensuring the long-term stable operation of the device.

[0046] With reference to Figures 2-5 , Figure 7 and Figure 8 , in order to prevent water from being discharged through the water seepage hole 15 during backwashing, a plugging head 52 is further included, the inner wall of the well wall pipe 1 is fixedly installed with a mounting frame 4, the mounting frame 4 is provided with a second sliding groove 42, the second sliding groove 42 is slidably installed with a mounting plate 5, the mounting frame 4 is fixedly installed with a guide column 41, the mounting plate 5 is slidably connected with the guide column 41, the plugging head 52 is fixedly installed on the mounting plate 5, and the mounting frame 4 is slidably installed with a connecting rod 51, one end of the connecting rod 51 is fixedly connected with the mounting plate 5, the other end of the connecting rod 51 is fixedly installed with a second wedge-shaped block 53, and the bottom of the sliding sealing ring 32 is provided with a pushing assembly 3 for driving the second wedge-shaped block 53 to slide.

[0047] With reference to Figure 3 and Figure 8 , the pushing assembly 3 includes a driving sleeve 31 fixedly installed at the bottom of the sliding sealing ring 32, a first wedge-shaped block 35 fixedly installed on the side wall of the driving sleeve 31, and a resilient member 54 (corrosion-resistant elastic rubber or corrosion-resistant spring) sleeved on the guide column 41, the two sides of the resilient member 54 are respectively in contact with the mounting plate 5 and the inner wall of the well wall pipe 1.

[0048] When the sliding seal ring 32 is lowered, the sliding seal ring 32 drives the first wedge block 35 to be lowered through the driving sleeve 31, the first wedge block 35 and the second wedge block 53 are matched through the inclined surface, the second wedge block 53 is extruded in the process of the first wedge block 35 being lowered, the second wedge block 53 is driven to move to the outside of the well wall pipe 1, thereby the sealing head 52 is driven to be inserted into the water seepage hole 15 through the connecting rod 51 and the mounting plate 5, so as to seal the water seepage hole 15, when the backwashing and the silt cleaning in the storage cavity 19 are completed, the pressure control valve reduces the pressure of the water in the water cavity, at this time, the elastic member 54 has the elastic potential energy greater than the pressure in the water cavity, so that the elastic member 54 drives the second wedge block 53 and the sealing head 52 to reset.

[0049] In summary, when the sliding seal ring 32 is lowered, the first wedge block 35 is driven to be lowered through the driving sleeve 31, the second wedge block 53 is driven to move to the outside of the well wall pipe 1 through the extrusion of the first wedge block 35 and the second wedge block 53, so that the sealing head 52 is accurately inserted into the water seepage hole 15, the water in the backwashing process is effectively prevented from being discharged from the water seepage hole 15, the backwashing water is prevented from flowing back to the foundation pit to increase the water accumulation burden, the backwashing pressure is ensured to be concentrated on the filter part 7, the backwashing cleaning effect is improved, the guide column 41 on the mounting frame 4 provides stable sliding guidance for the mounting plate 5, and the accuracy of the movement of the sealing head 52 is ensured through the support of the elastic member 54, so that the water seepage hole 15 cannot be accurately sealed due to deviation is avoided, after the backwashing and the silt cleaning in the storage cavity 19 are completed, the pressure control valve reduces the pressure of the water in the water cavity, the elastic member 54 can drive the second wedge block 53 and the sealing head 52 to reset automatically through the elastic potential energy, manual operation is not required, the device recovery process is simplified, the water seepage hole 15 can normally enter water after resetting, the subsequent water pumping function of the device is not affected, and the coherence and convenience of the overall operation of the device are further ensured.

[0050] Referring to Figures 2-5 , Figure 7 and Figure 8 , in order to prevent sewage from entering the soil layer and the foundation pit through the sewage inlet hole 16 in the backwashing process, the sealing cover 61 is further included, the hinge seat 6 is fixedly installed on the inner wall of the cone head 11, the sealing cover 61 is rotationally arranged on the hinge seat 6, the sealing cover 61 is semispherical, when the sliding seal ring 32 is lowered, the mounting plate 5 is in contact with the outer wall of the sealing cover 61, so as to drive the sealing cover 61 to cover the sewage inlet hole 16, after the mounting plate 5 is reset by the elastic member 54, the water pressure in the soil layer drives the sealing cover 61 to rotate, so that the silt in the foundation pit and the soil layer enters the storage cavity 19 through the sewage inlet hole 16.

[0051] In summary, in the device, when the sliding sealing ring 32 descends, the mounting plate 5 is in contact with the outer wall of the sealing cover 61, which can drive the hemispherical sealing cover 61 to rotate around the hinge seat 6 and accurately cover the sewage inlet hole 16, effectively blocking the backflow of sewage from the sewage inlet hole 16 to the soil layer and foundation pit during the backwashing process, avoiding pollution of the foundation pit environment or increasing the burden of water accumulation treatment. On the other hand, the sealing cover 61 is designed in a hemispherical shape, which not only ensures the tight covering of the sewage inlet hole 16, but also can be smoothly pushed to rotate in the opposite direction by the internal water pressure of the soil layer after the mounting plate 5 is reset, so that the silt in the foundation pit and soil layer can normally enter the storage cavity 19 through the sewage inlet hole 16, without affecting the sewage collection function of the device. The overall structure realizes automatic sealing and opening through mechanical linkage, without the need for additional power or manual operation, and is synchronized with the backwashing process, further improving the automation and reliability of the device operation.

[0052] With reference to Figure 3 , Figure 4 and Figure 9 , the filtering part 7 includes a filter screen 73, both ends of the filter screen 73 are fixedly installed with a fixed ring 72 and a sliding ring 71 respectively, the fixed ring 72 is fixedly installed at the bottom of the side wall of the mounting cylinder 2, and the sliding ring 71 is slidingly installed at the top of the side wall of the mounting cylinder 2. The top of the sliding ring 71 is fixedly installed with a second connecting block 74, and the second connecting block 74 is fixedly connected with the side wall of the first wedge-shaped block 35. Among them, the filter screen 73 is a flexible screen.

[0053] When the sliding sealing ring 32 descends, the first wedge-shaped block 35 drives the sliding ring 71 to move downward along the side wall of the mounting cylinder 2 through the second connecting block 74, and the flexible filter screen 73 is in a relaxed state due to the reduced distance between the sliding ring 71 and the fixed ring 72, and the mesh naturally widens. After the backwashing is completed, the elastic member 54 drives the first wedge-shaped block 35 to reset and move upward, and the sliding ring 71 moves upward accordingly. The filter screen 73 is pulled tight by the sliding ring 71 and the fixed ring 72, and the mesh is stretched and deformed under the action of tension. During backwashing, the widened mesh of the relaxed filter screen 73 facilitates the rapid passage of backwashing water carrying impurities. After resetting, the mesh of the tightened filter screen 73 is stretched, and the fine filtering state is restored, ensuring the interception effect of silt during normal water pumping.

[0054] In summary, on the one hand, the device realizes the state switching of the filter screen 73 from relaxation to tension by making the filter screen 73 follow the lifting and lowering of the sliding ring 71. During backwashing, the widened mesh can reduce water flow resistance, so that backwashing water can more smoothly flush and carry impurities out, improving the backwashing cleaning efficiency. On the other hand, during normal water pumping, the mesh of the tightened filter screen 73 is stretched, which can form a finer filtering interface, enhance the interception effect of fine silt, and further ensure the cleanliness of the water pumped out by the water pumping pipe 81. Thirdly, this dynamic adjustment mechanism is mechanically linked with the backwashing and resetting process of the device, and the automatic switching of the state of the filter screen 73 can be realized without additional control components, which not only strengthens the pertinence of filtering and backwashing, but also simplifies the structure of the device and improves the operation reliability.

[0055] Referring to Figure 3 and Figure 11 Further comprising a shunt plate 93 fixedly installed in the mounting sleeve 22, and an arc-shaped water spray groove 931 is arranged in the shunt plate 93. In use, the high-pressure clean water enters the shunt plate 93 and is guided by the arc-shaped water spray groove 931 to spray toward the inner wall of the mounting cylinder 2 and the filter screen 73 in a spiral water flow.

[0056] Such a spiral water flow can form a rotating scouring force along the inner wall of the mounting cylinder 2, which can comprehensively cover each area of the filter part 7, avoid backflush dead angles, and improve the cleaning coverage of the filter screen 73. On the other hand, the centrifugal force generated by the rotating water flow can enhance the stripping effect of impurities on the surface of the filter screen 73, and at the same time drive the impurities to move toward the storage cavity 19, so that the impurities can be more thoroughly discharged in cooperation with the subsequent sewage process. In addition, the flow guide design of the arc-shaped water spray groove 931 makes the impact force of the high-pressure clean water more concentrated and uniformly distributed, which not only improves the backflush efficiency, but also avoids that the local water flow is too large to cause damage to the filter screen 73, thereby prolonging the service life of the filter part 7.

[0057] Referring to Figure 3 and Figure 6 The bottom of the shunt plate 93 is fixedly installed with a first water level probe 10, and the inner wall of the sidewall of the mounting cylinder 2 is fixedly installed with a second water level probe 101.

[0058] When the filtered water overflows the first water level probe 10, the first water level probe 10 controls the external water pump to work to pump water. When the filtered water is lower than the second water level probe 101, the second water level probe 101 controls the external water pump to stop working.

[0059] In summary, on the one hand, through the cooperative control of the first water level probe 10 and the second water level probe 101, the water pump realizes intelligent operation of automatic starting when full of water and automatic stopping when less water, without manual monitoring of the water level in the mounting cylinder 2, which greatly reduces labor costs and avoids water overflow or pump running due to untimely manual operation. On the other hand, the setting of the first water level probe 10 triggering pumping can ensure that the water pump is started only after the filtered water in the mounting cylinder 2 reaches a certain amount, thereby avoiding frequent starting and stopping of the water pump (such as starting when the water level just passes through the water inlet hole 21), prolonging the service life of the water pump. Thirdly, the setting of the second water level probe 101 triggering stopping can prevent the water pump from idling when the water level in the mounting cylinder 2 is too low, avoid problems such as overheating of the pump body and wear of components caused by idling, and at the same time avoid pumping the small amount of impurities (not completely removed by backflushing) deposited at the bottom of the mounting cylinder 2 into the pipeline, thereby further ensuring the stability of the precipitation system and the cleanliness of the water quality.

[0060] In summary, the device can be directly pressed into the foundation pit by the excavator bucket through the soil breaking block of the cone head 11 and the outer wall of the conical table 12, without the need for special drilling equipment; at the same time, it supports the process of excavating the surrounding soil first, retaining a safe range of 20-30 cm of soil layer, and then pressing the safe range of soil again to make the device lower than the safe water level of the foundation pit, which adapts to the foundation pit excavation process and reduces the impact of installation on construction progress.

[0061] The flexible filter screen 73 of the filter part 7 in the device can efficiently intercept mud and water impurities to prevent them from entering the inside of the installation cylinder 2; and the filter screen 73 can switch between the relaxed and tightened states by lifting and lowering the sliding ring 71, so that the mesh width is widened to improve the efficiency of impurity discharge during backflushing, and the mesh length is lengthened to enhance the filtering precision during normal water pumping, which, in combination with the independent water pumping pipe 81 and the sewage discharge pipe 92, not only ensures the water pumping efficiency, but also continuously outputs clean water.

[0062] In the device, the high-pressure clean water forms a spiral water flow through the arc-shaped water jet groove 931 of the flow distribution disc 93 during backflushing, which can cover the filter screen 73 without dead angles and strip impurities by centrifugal force; at the same time, the sliding sealing ring 32 descending will trigger the plugging of the top water inlet, the water seepage hole 15, and the sewage inlet hole 16 simultaneously, preventing backflushing sewage from overflowing into the foundation pit or the backseeped soil layer, and ensuring that the backflushing process does not affect the drying of the foundation pit and the stability of the soil layer.

[0063] The first water level probe 10 and the second water level probe 101 cooperatively control the water pump to realize automatic start when the water is full and automatic stop when the water is less, without the need for manual monitoring of the water level; this not only avoids the overflow of accumulated water or the running of the empty pump due to the untimely manual operation, but also reduces the frequent start and stop of the water pump, prolongs the service life of the equipment, and greatly reduces the labor input on the construction site.

[0064] In the device, all cleaning and sewage discharge actions do not need to disassemble the device, and backflushing cleaning only needs to start the high-pressure water pump, and sewage discharge is directly connected to the water collection tank through the sewage discharge pipe 92; the sliding components are all equipped with guide structures (guide columns 41, sliding grooves, etc.) to prevent jamming, and the elastic member 54 drives the plugging structure to automatically reset, reducing the failure frequency and maintenance difficulty, and ensuring the long-term stable operation of the device.

[0065] The device takes the lifting of the sliding sealing ring 32 as the core, synchronously links the state adjustment of the filter screen 73, multi-position plugging, backflushing water flow guiding, and other functions, without the need for additional power or complex electrical control systems, realizing one action with multiple effects, and the one-action multi-effect design not only simplifies the structure of the device, but also avoids the coordination problem of multiple independent components, improving the operation reliability.

[0066] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application, and any skilled person in the art can make some changes or modifications to the above-mentioned technical content with the prompt as equivalent embodiments of equivalent changes without departing from the technical solution of the present application. Any simple modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application without departing from the technical solution of the present application shall still fall within the scope of the present application.

Claims

1. A deep foundation pit dewatering self-induction pumping device, characterized in that, include: The outer casing includes a well wall pipe (1) with seepage holes (15) on its side wall, a cone (11) is fixedly installed at the bottom of the well wall pipe (1), a storage cavity (19) is provided inside the cone (11), and a frustum (12) is fixedly installed at the top of the well wall pipe (1). The filter inner liner includes an installation cylinder (2) disposed inside the well wall pipe (1) and coaxial with the well wall pipe (1) and a filter part (7) sleeved on the outer wall of the installation cylinder (2). A sealing block (8) is fixedly installed on the top of the mounting cylinder (2), and a water pumping pipe (81) extending into the mounting cylinder (2) and a sewage pipe (92) extending into the storage cavity (19) are fixedly installed on the sealing block (8). A drive component is disposed on the mounting cylinder (2); The backwash sealing component is installed inside the housing. When the water pressure inside the drive component increases, the drive component drives the sealing component to seal the housing. When the water pressure inside the drive component decreases, the elastic element (54) in the drive component drives the sealing component to reset. The drive assembly includes a mounting sleeve (22) fixedly mounted on the top of the mounting cylinder (2). A first groove (23) is provided on the side wall of the mounting sleeve (22). A sealing slider (34) is slidably mounted in the first groove (23). A piston plate (33) is fixedly mounted inside the mounting sleeve (22) extending from the sealing slider (34). A drain pipe (91) is fixedly mounted at the bottom of the piston plate (33). A pressure control valve is provided on the drain pipe (91). A sliding sealing ring (32) is fixedly mounted on the outside of the mounting sleeve (22) extending from the sealing slider (34). A clean water pipe (9) is fixedly mounted on the top of the mounting sleeve (22). The inlet end of the clean water pipe (9) is connected to a high-pressure water pump outside the pit. The plugging assembly includes a plugging head (52), an mounting frame (4) is fixedly installed on the inner wall of the well wall pipe (1), a second sliding groove (42) is provided on the mounting frame (4), an mounting plate (5) is slidably installed in the second sliding groove (42), a guide column (41) is fixedly installed on the mounting frame (4), the mounting plate (5) is slidably connected to the guide column (41), the plugging head (52) is fixedly installed on the mounting plate (5), a connecting rod (51) is slidably installed on the mounting frame (4), one end of the connecting rod (51) is fixedly connected to the mounting plate (5), and a second wedge block (53) is fixedly installed on the other end of the connecting rod (51). A pushing assembly (3) for driving the second wedge block (53) to slide is provided at the bottom of the sliding sealing ring (32). The filter part (7) comprises a flexible filter screen (73), both ends of the filter screen (73) are fixedly provided with a fixed ring (72) and a sliding ring (71) respectively, the fixed ring (72) is fixedly installed at the bottom of the side wall of the mounting cylinder (2), the sliding ring (71) is slidingly installed at the top of the side wall of the mounting cylinder (2), the top of the sliding ring (71) is fixedly provided with a second connecting block (74), and the second connecting block (74) is fixedly connected with the side wall of the first wedge-shaped block (35).

2. The self-induction water pumping device for deep foundation pit dewatering according to claim 1, characterized in that, The shell further comprises a frustum (12) fixedly installed at the top of the well wall pipe (1); The outer wall of the frustum (12) is fixedly provided with a first soil breaking block (13), the outer wall of the cone head (11) is fixedly provided with a second soil breaking block (14), the maximum diameter of the cone head (11) and the frustum (12) is greater than the diameter of the well wall pipe (1), and the top of the frustum (12) is fixedly provided with a handle (17).

3. The self-induction water pumping device for deep foundation pit dewatering according to claim 1, characterized in that, The cone wall of the cone head (11) is provided with a sewage inlet hole (16), the bottom of the storage cavity (19) is provided as a downwardly recessed groove, the cylinder wall of the mounting cylinder (2) is provided with a water inlet hole (21), the inner side of the storage cavity (19) is fixedly provided with an arc-shaped first connecting block (18), the mounting cylinder (2) is fixedly connected with the first connecting block (18), the bottom of the mounting cylinder (2) is provided with an upwardly recessed flow converging groove, and the water inlet end of the water pumping pipe (81) and the water inlet end of the sewage discharge pipe (92) are both provided with check valves.

4. The self-induction water pumping device for deep foundation pit dewatering according to claim 1, characterized in that, The pushing assembly (3) comprises a driving sleeve (31) fixedly installed at the bottom of the sliding sealing ring (32), the side wall of the driving sleeve (31) is fixedly provided with a first wedge-shaped block (35), the guide column (41) is sleeved with an elastic member (54), and the two sides of the elastic member (54) abut against the inner wall of the well wall pipe (1) and the mounting plate (5) respectively.

5. The self-induction water pumping device for deep foundation pit dewatering according to claim 4, characterized in that, The plugging assembly further comprises a plugging cover (61), the inner wall of the cone head (11) is fixedly provided with a hinged seat (6), the plugging cover (61) is rotationally arranged on the hinged seat (6), and the plugging cover (61) is semispherical.

6. The self-induction water pumping device for deep foundation pit dewatering according to claim 1, characterized in that, The mounting sleeve (22) is fixedly provided with a flow dividing disc (93) inside, the flow dividing disc (93) is provided with an arc-shaped water spraying groove (931) inside, in use, high-pressure clean water enters the flow dividing disc (93) and is sprayed to the inner wall of the mounting cylinder (2) and the filter screen (73) in a spiral water flow through the guidance of the arc-shaped water spraying groove (931).

7. The self-induction water pumping device for deep foundation pit dewatering according to claim 6, characterized in that, The bottom of the flow dividing disc (93) is fixedly provided with a first water level probe (10), and the inner wall bottom of the side wall of the mounting cylinder (2) is fixedly provided with a second water level probe (101).

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