A building foundation pit drainage system

Abstract

The application relates to a building foundation pit drainage system, which comprises a plurality of open ditches and a water collecting well, the open ditches are dug on the inner bottom wall of the foundation pit, a treatment box is arranged on the ground and corresponds to the water collecting well, a water inlet pipe is arranged in the water collecting well, the water inlet pipe is fixedly communicated with the corresponding treatment box, a water pump is arranged on the water inlet pipe, a slow flow tank is fixedly connected to the inner bottom wall of the treatment box, the upper surface of the slow flow tank is a slow flow surface, a settling tank is formed between the outer side wall of the slow flow tank and the inner side wall of the treatment box, a water outlet pipe is further fixedly communicated with the treatment box, the water outlet pipe is located between the water inlet pipe and the slow flow surface, a sieve plate is arranged in the treatment box and located between the water inlet pipe and the water outlet pipe. The application has the effect of reducing the adverse influence on the external environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of construction equipment, in particular to a building foundation pit drainage system. BACKGROUND

[0002] The building foundation pit is a space excavated from the ground for the construction of the underground structure of the building. During the excavation of the foundation pit, underground water may seep out, and at this time, the underground water seeping into the foundation pit needs to be pumped out of the foundation pit. The common method of foundation pit drainage is to dig multiple open ditches in the foundation pit and to dig a water collection well at each of the four corners of the foundation pit. The open ditches guide the water in the foundation pit to the water collection well. A drainage ditch is also dug on the ground on one side of the foundation pit. A water pipe is inserted into the water collection well, and a water pump is installed on the water pipe. The water pump pumps the water in the water collection well into the drainage ditch through the water pipe, and the water in the drainage ditch is finally discharged to the outside.

[0003] Since the foundation pit is in the process of excavation, the bottom surface of the foundation pit has not been hardened. The flow of water in the foundation pit will wash the silt in the foundation pit into the water collection well, and thus the water flowing into the municipal pipeline also contains silt and various impurities. Since the water contains silt and other impurities, the direct discharge of the water in the drainage ditch to the outside will have a negative impact on the outside environment. SUMMARY

[0004] In order to reduce the negative impact on the outside environment, the present application provides a building foundation pit drainage system.

[0005] The building foundation pit drainage system provided by the present application adopts the following technical solution:

[0006] A building foundation pit drainage system includes multiple open ditches and a water collection well dug on the inner bottom wall of the foundation pit. A treatment tank corresponding to the water collection well is provided on the ground. An inlet pipe is provided in the water collection well, and the inlet pipe is fixedly connected to the corresponding treatment tank. A water pump is installed on the inlet pipe. An inner bottom wall of the treatment tank is fixedly connected to a slow-flow tank. An upper surface of the slow-flow tank is a slow-flow surface. A settling tank is formed between an outer side wall of the slow-flow tank and an inner side wall of the treatment tank. An outlet pipe is fixedly connected to the treatment tank and located between the inlet pipe and the slow-flow surface. A sieve plate is provided in the treatment tank and located between the inlet pipe and the outlet pipe.

[0007] By adopting the technical scheme, when there is water in the foundation pit, the water in the foundation pit flows into the water collecting well along the open ditch, an operator starts the water pump, the water pump pumps the water into the treatment box through the water inlet pipe, the water falls onto the sieve plate after entering the treatment box, the sieve plate filters the water, the filtered water falls onto the slow flow box, the water impacts on the slow flow surface, and then flows to the settling tank along the slow flow surface and the side wall of the slow flow box, the water is settled in the settling tank, and the silt in the water is settled at the bottom of the treatment box, so that the water at the upper part of the treatment box is clarified, the slow flow surface reduces the flow rate of the water, and reduces the situation that the silt at the bottom of the treatment box is stirred up when the water falls, so that the situation that the water at the upper part of the treatment box contains a large amount of impurities is reduced, the clarified water at the upper part of the treatment box is discharged to the outside through the water outlet pipe, the situation that a large amount of impurities is discharged to the outside along the water is reduced, and the adverse effect on the external environment is reduced.

[0008] Optionally, the treatment box is provided with a cleaning assembly for cleaning the silt settled on the slow flow surface.

[0009] By adopting the technical scheme, as the water flows into the treatment box, part of the silt is accumulated on the slow flow surface, as the water flows into the treatment box, the cleaning assembly cleans the silt on the slow flow surface into the settling tank, the situation that the silt on the slow flow surface is stirred up by the water flowing into the treatment box is reduced, so that the content of the silt in the water at the upper part of the treatment box is reduced, and the amount of impurities discharged to the outside is further reduced.

[0010] Optionally, the cleaning assembly comprises two scrapers arranged on the slow flow box, the lower surfaces of the scrapers are in contact with the slow flow surface, the mutually close surfaces of the two scrapers are attached to each other, a support rod is fixedly connected to the lower surface of each scraper, a sliding hole corresponding to the support rod is arranged on the slow flow surface, the length direction of the sliding hole is arranged along the radial direction of the water collecting well, each support rod is slidingly inserted into the corresponding sliding hole, the lower end of each support rod extends into the slow flow box, an installation block is fixedly connected to the lower end of each support rod, the installation block is slidingly connected to the inner bottom wall of the slow flow box, the movement direction of the installation block is arranged along the length direction of the sliding hole, and the treatment box is further provided with a driving assembly for driving the two scrapers to move.

[0011] By adopting the technical scheme, when the water flows into the treatment box, the water flowing in drives the driving assembly to work, the driving assembly works to drive the two installation blocks to move away from each other, the movement of the installation blocks drives the support rods to move along the sliding holes, the movement of the support rods drives the scrapers to move, so that the two scrapers move away from each other, the movement of the scrapers removes the silt on the slow flow surface to the settling tank, and then the driving assembly works to drive the two installation blocks to move closer to each other, the movement of the installation blocks drives the support rods and the scrapers to move, so that the two scrapers move closer to each other until the two scrapers contact each other.

[0012] Optionally, a flow guide hopper is slidably connected in the treatment box, the flow guide hopper slides along the axial direction of the treatment box, the inner diameter of the upper end of the flow guide hopper is larger than the inner diameter of the lower end of the flow guide hopper, a plurality of connecting springs are fixedly connected to the upper end surface of the flow guide hopper, the connecting springs are distributed along the circumferential direction of the flow guide hopper, the upper ends of the connecting springs are fixedly connected to the inner side wall of the treatment box, the sieve plate is fixedly connected to the inner side wall of the flow guide hopper, the driving assembly comprises a hinge rod hingedly connected to the upper surface of each mounting block, the hinge rod is inserted into the corresponding sliding hole, the lower ends of the two hinge rods are inclined away from each other, each scraper plate is located between the two hinge rods, the upper end of the hinge rod is hingedly connected to the lower end of the flow guide hopper, a return spring is fixedly connected to the inner side wall of the slow flow box at the end away from the mounting block.

[0013] By adopting the above technical scheme, in the initial state, the return spring is in a natural state, and the lower ends of the two hinge rods are inclined away from each other; when water flows into the treatment box, the water flows into the flow guide hopper, because the diameter of the upper end of the flow guide hopper is larger than the diameter of the lower end of the flow guide hopper, and the speed of the water flowing into the flow guide hopper is greater than the speed of the water flowing out of the flow guide hopper, so the water accumulates in the flow guide hopper, and as the water continues to flow into the flow guide hopper, the flow guide hopper moves downward under the action of gravity.

[0014] The movement of the flow guide hopper stretches the connecting springs, and the downward movement of the flow guide hopper shortens the distance between the lower end surface of the flow guide hopper and the inner bottom wall of the slow flow box, in the process, the lower ends of the two hinge rods rotate away from each other, and the hinge rods push the mounting blocks, the support rods and the scraper plates to move at the same time, so that the two scraper plates move away from each other, the movement of the scraper plates removes the silt on the slow flow surface into the settling tank, and the movement of the mounting blocks also compresses the return spring at the same time; when no water flows into the flow guide hopper, the remaining water in the flow guide hopper gradually flows out, and when the water in the flow guide hopper reduces to a certain amount, the connecting springs recover from deformation and pull the flow guide hopper to move upward, at the same time, the lower ends of the two hinge rods rotate towards each other, the return spring recovers from deformation and pushes the mounting blocks, the support rods and the scraper plates to move, and when the return spring recovers to the initial state, the two scraper plates are in close contact with each other.

[0015] Optionally, the driving assembly further comprises a filter barrel rotatably connected to the slow flow surface, a plurality of sieve holes are formed in the side wall of the filter barrel, the diameter of the sieve holes on the filter barrel is smaller than the diameter of the sieve holes on the sieve plate, the upper end of the filter barrel is open, an annular plate is fixedly connected to the lower end surface of the flow guide hopper, the annular plate is coaxial with the flow guide hopper, the outer diameter of the filter barrel is smaller than the inner diameter of the annular plate, an external thread is formed in the outer side wall of the filter barrel, an internal thread is formed in the inner side wall of the annular plate, the filter barrel is threadedly connected to the annular plate, the filter barrel is located between the two scraper plates, and the side walls of the two scraper plates in close contact with each other are in close contact with the outer side wall of the filter barrel.

[0016] Through the above technical scheme, the water flow in the guide hopper flows into the filter barrel, the filter barrel filters the water for the second time, and the amount of impurities in the water discharged to the outside is further reduced; when the guide hopper moves downward, the guide hopper drives the ring plate to move, the ring plate is threadedly connected with the filter barrel, and the ring plate does not rotate under the action of the guide hopper, so that the ring plate drives the filter barrel to rotate, the rotation of the filter barrel forms a water flow vortex below the guide hopper, thereby accelerating the speed of the water flowing out of the guide hopper, and the speed of the water flowing out of the guide hopper is greater than the speed of the water flowing into the guide hopper; when the amount of water in the guide hopper is reduced to a certain amount, the connecting spring restores the deformation and pulls the guide hopper to move upward, so that the scraper can be reset; when the connecting spring restores to the natural state, the filter barrel no longer rotates, and at this time, water can be accumulated in the guide hopper, so that the scraper can scrape the silt on the slack flow surface multiple times in the process of the water flowing into the treatment box, and the situation that the water stirs up the silt on the slack flow surface is further reduced.

[0017] Optionally, the sieve plate is fixedly connected with an annular guide plate, the guide plate is upwardly arranged, the guide plate is perpendicular to the sieve plate, and the sieve plate and the guide plate are coaxially arranged.

[0018] Through the above technical scheme, when the water flows onto the sieve plate, the sieve plate and the guide plate cooperate to filter the impurities in the water, the impurities are left at the position of the sieve plate between the guide plate and the inner side wall of the treatment box, so that the impurities are located at the periphery of the treatment box, and the operator can conveniently clean the impurities on the sieve plate.

[0019] Optionally, a plurality of limiting blocks are fixedly connected to the outer side wall of the guide hopper, the limiting blocks are distributed in the circumferential direction of the guide hopper, a plurality of limiting grooves are formed in the inner side wall of the treatment box in one-to-one correspondence with the limiting blocks, and each limiting block is slidingly inserted into the corresponding limiting groove.

[0020] Through the above technical scheme, when the guide hopper moves along the axial direction of the treatment box, the guide hopper drives the limiting blocks to move along the limiting grooves, and the limiting blocks cooperate with the limiting grooves to limit the guide hopper, so that the guide hopper moves along the circumferential direction of the treatment box without rotating.

[0021] Optionally, a top rod is fixedly connected to the inner bottom wall of the slack flow box, the top rod is located between the two mounting blocks, the length direction of the top rod is arranged along the sliding direction of the mounting block, and each mounting block abuts against the top rod.

[0022] Through the above technical scheme, when the reset spring restores the deformation, the mounting block contacts the top rod, and the top rod positions the mounting block, so that the lower ends of the two hinged rods are kept inclined in the direction away from each other.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. By setting the processing box, water inlet pipe, water pump, water outlet pipe, sieve plate, slow flow box and slow flow surface, the amount of impurities discharged to the outside along the water is reduced, thereby reducing the adverse effects on the external environment;

[0025] 2. By setting the scraper, support rod, mounting block, sliding hole and driving assembly, the situation that the water flowing into the processing box excites the silt on the slow flow surface is reduced, thereby reducing the silt content in the water at the upper part of the processing box, and further reducing the amount of impurities discharged to the outside;

[0026] 3. By setting the flow guide hopper, connecting spring, hinged rod and reset spring, the two scrapers can be driven to move, thereby cleaning the silt on the slow flow surface. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the foundation pit drainage system embodied by the embodiments of the present application.

[0028] Figure 2 is a schematic diagram of the connection relationship between the processing box and the foundation pit embodied by the embodiments of the present application.

[0029] Figure 3 is a sectional view of the overall structure of the processing box embodied by the embodiments of the present application.

[0030] Figure 4 is a sectional view of the connection relationship between the flow guide hopper and the processing box embodied by the embodiments of the present application.

[0031] Figure 5 is a sectional view of the positional relationship between the scraper and the filter barrel embodied by the embodiments of the present application.

[0032] Figure 6 is a sectional view of the partial structure of the driving assembly embodied by the embodiments of the present application.

[0033] BRIEF DESCRIPTION OF DRAWINGS: 1, water collecting well; 11, open ditch; 12, drainage ditch; 2, processing box; 21, water inlet pipe; 211, water pump; 22, water outlet pipe; 23, limiting groove; 24, settling tank; 3, flow guide hopper; 31, limiting block; 32, connecting spring; 4, sieve plate; 41, flow guide plate; 5, slow flow box; 51, slow flow surface; 52, sliding hole; 53, sliding groove; 6, filter barrel; 7, cleaning assembly; 71, scraper; 711, arc plate; 712, side plate; 72, support rod; 73, mounting block; 74, sliding block; 8, driving assembly; 81, ring plate; 82, hinged rod; 83, top rod; 84, reset spring. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying Figures 1-6 The present application will be further described in detail.

[0035] The embodiment of the application discloses a building foundation pit drainage system. Figure 1 With Figure 2 The foundation pit drainage system comprises a plurality of open ditches 11 dug on the bottom surface of the foundation pit, a water collecting well 1 is dug at each of four end corners of the foundation pit, each open ditch 11 is communicated with the corresponding water collecting well 1, a drainage ditch 12 corresponding to the water collecting well 1 is formed on the ground, the drainage ditch 12 is located at one side of the water collecting well 1, a treatment box 2 corresponding to the water collecting well 1 is further arranged on the ground, the treatment box 2 is in a cylindrical shape, and the treatment box 2 is located between the water collecting well 1 and the drainage ditch 12; a water inlet pipe 21 and a water outlet pipe 22 are fixedly connected to the side wall of the treatment box 2 in communication, the water inlet pipe 21 is located above the water outlet pipe 22, one end of the water inlet pipe 21, away from the treatment box 2, extends into the corresponding water collecting well 1, and a water pump 211 is further arranged on the water inlet pipe 21, and one end of the water outlet pipe 22, away from the treatment box 2, extends into the drainage ditch 12.

[0036] With Figure 2 And Figure 3 A flow guide hopper 3 is arranged in the treatment box 2, the flow guide hopper 3 is in a conical shape, the flow guide hopper 3 is coaxially arranged with the treatment box 2, the upper end and the lower end of the flow guide hopper 3 are both in an open state, the diameter of the inner wall of the flow guide hopper 3 gradually decreases from top to bottom, and the inner diameter of the treatment box 2 is greater than the maximum diameter of the outer wall of the flow guide hopper 3. Figure 3 And Figure 4 A plurality of limiting blocks 31 are fixedly connected to the top of the outer side wall of the flow guide hopper 3, the plurality of limiting blocks 31 are uniformly arranged along the circumferential direction of the flow guide hopper 3, a limiting groove 23 corresponding to the limiting block 31 is further formed in the inner side wall of the treatment box 2, each limiting block 31 is slidingly inserted into the corresponding limiting groove 23, and the length direction of the limiting groove 23 is arranged along the axial direction of the treatment box 2, so that the flow guide hopper 3 is slidingly connected to the treatment box 2, and the number of the limiting blocks 31 is two in the embodiment.

[0037] A connecting spring 32 is fixedly connected to the upper end wall of the limiting groove 23, the connecting spring 32 is fixedly connected to the upper end face of the flow guide hopper 3, the connecting spring 32 is in a natural state when there is no water in the flow guide hopper 3, and the flow guide hopper 3 is located at the upper end of the treatment box 2; a horizontally arranged sieve plate 4 is fixedly connected to the inner side wall of the flow guide hopper 3, the sieve plate 4 is in an annular shape, and the sieve plate 4 is coaxially arranged with the flow guide hopper 3, and the water outlet of the water inlet pipe 21 is located above the sieve plate 4; a flow guide plate 41 is fixedly connected to the inner side wall of the sieve plate 4, the flow guide plate 41 is perpendicular to the sieve plate 4, a plurality of through holes penetrating through the flow guide plate 41 are formed in the flow guide plate 41, the diameters of the through holes are consistent with the diameters of the sieve holes in the sieve plate 4, the sieve plate 4 and the flow guide plate 41 cooperate to perform the first filtration on the silt in water, and the flow guide plate 41 guides the silt on the sieve plate 4, so that the silt is accumulated at the edge of the flow guide hopper 3, and the operator can conveniently clean up the silt.

[0038] A cylindrical slow-flow box 5 is fixedly connected to the inner bottom wall of the treatment box 2. The slow-flow box 5 is coaxial with the treatment box 2. The upper surface of the slow-flow box 5 is the slow-flow surface 51. The inlet of the outlet pipe 22 is located above the slow-flow box 5. The lower opening of the guide bucket 3 is located directly above the slow-flow box 5. A settling trough 24 is formed between the outer side wall of the slow-flow box 5 and the inner side wall of the treatment box 2. The water in the treatment box 2 settles in the settling trough 24, making the water in the upper part of the treatment box 2 clear. The water in the upper part of the treatment box 2 is discharged into the drainage ditch 12 along the outlet pipe 22 and finally discharged to the outside. A filter bucket 6 is rotatably connected to the upper surface of the slow-flow box 5. The opening of the filter bucket 6 is facing upward. Multiple filter holes penetrating the side wall of the filter bucket 6 are opened. The diameter of the filter holes of the filter bucket 6 is smaller than the diameter of the sieve holes on the sieve plate 4. The outer diameter of the filter bucket 6 is smaller than the minimum diameter of the inner side wall of the guide bucket 3.

[0039] Reference Figure 3 and Figure 5 The slow-flow box 5 is also equipped with a cleaning component 7 for scraping away mud and sand on the slow-flow surface 51. The cleaning component 7 includes two scrapers 71, and the filter barrel 6 is located between the two scrapers 71. Each scraper 71 includes an arc-shaped plate 711. The axial direction of the arc-shaped plate 711 is set along the axial direction of the filter barrel 6. The arc-shaped plate 711 is close to the side wall of the filter barrel 6 and fits against the outer side wall of the filter barrel 6. The arc-shaped plates 711 of the two scrapers 71 cooperate to cover the bottom of the outer side wall of the filter barrel 6. Each side of the arc-shaped plate 711 has an integrally formed side plate 712. The length of the scraper 71 is equal to the outer diameter of the slow-flow box 5. The lower surface of the scraper 71 contacts the slow-flow surface 51. The side of the scraper 71 that contacts the slow-flow surface 51 is also provided with a tip.

[0040] Reference Figure 3 , Figure 5 and Figure 6 A support rod 72 is vertically fixedly connected to the lower surface of the arc plate 711. A sliding hole 52 corresponding to the support rod 72 is opened on the flow-slowing surface 51. The length direction of the sliding hole 52 is arranged along the radial direction of the flow-slowing box 5. The sliding hole 52 communicates with the interior of the flow-slowing box 5. Each support rod 72 is slidably inserted into the corresponding sliding hole 52. The lower end of the support rod 72 extends into the flow-slowing box 5. A mounting block 73 is fixedly connected to the lower end of the support rod 72. A slider 74 is fixedly connected to the surface of the mounting block 73 away from the support rod 72. A groove 53 corresponding to the slider 74 is opened on the inner bottom wall of the flow-slowing box 5. The length direction of each groove 53 is arranged along the length direction of the corresponding sliding hole 52. The slider 74 is slidably inserted into the corresponding groove 53.

[0041] The driving assembly 8 is arranged in the slow flow tank 5 and drives the scraper 71 to move, the driving assembly 8 comprises a ring plate 81 fixedly connected to the lower end surface of the flow guide hopper 3, the ring plate 81 is coaxially arranged with the flow guide hopper 3, the ring plate 81 is sleeved on the filter barrel 6, and the inner side wall of the ring plate 81 is in contact with the outer side wall of the filter barrel 6; the inner side wall of the ring plate 81 is provided with an internal thread, the outer side wall of the filter barrel 6 is provided with an external thread, and the ring plate 81 is threadedly connected with the filter barrel 6.

[0042] The upper surface of the mounting block 73 is hingedly connected with a hinged rod 82, the hinged rod 82 is arranged in the sliding hole 52, the upper ends of the two hinged rods 82 are hingedly connected to the lower end surface of the ring plate 81; a top rod 83 is further arranged between the two mounting blocks 73, the top rod 83 is fixedly connected to the inner bottom wall of the slow flow tank 5, the length direction of the top rod 83 is arranged along the length direction of the sliding groove 53, each mounting block 73 is in contact with the top rod 83, so that the two hinged rods 82 are inclined, the upper ends of the two hinged rods 82 are inclined towards each other, and the lower ends of the two hinged rods 82 are inclined away from each other.

[0043] A reset spring 84 is fixedly connected to the side wall of each mounting block 73 away from each other, the length direction of the reset spring 84 is arranged along the length direction of the sliding groove 53, and one end of the reset spring 84 away from the mounting block 73 is fixedly connected to the inner side wall of the treatment tank 2; the reset spring 84 is always in a compressed state, and the reset spring 84 makes the two mounting blocks 73 abut against the top rod 83.

[0044] When water seeps out of the foundation pit, the water flows into the water collecting well 1 along the open ditch 11, an operator starts the water pump 211, the water pump 211 pumps the water in the water collecting well 1, the water in the water collecting well 1 flows to the sieve plate 4 through the water inlet pipe 21, the sieve plate 4 and the flow guide plate 41 cooperate to perform the first filtration on the water flowing into the treatment tank 2, the filtered water flows into the flow guide hopper 3 and then flows into the filter barrel 6, the filter barrel 6 performs the second filtration on the water, further reducing the condition that the water contains a large amount of impurities, the filtered water flows to the slow flow surface 51, the slow flow surface 51 reduces the impact force of the water, and reduces the condition that the water directly falls into the water at the bottom of the treatment tank 2, causing the sediment at the bottom of the water to surge again.

[0045] When the water flows into the flow guide hopper 3, because the diameter of the upper end of the flow guide hopper 3 is greater than the diameter of the lower end of the flow guide hopper 3, when the water just starts to flow into the flow guide hopper 3, the water inflow speed is greater than the water outflow speed, so the water accumulates in the flow guide hopper 3, thereby causing the flow guide hopper 3 to gradually move downwards under the action of gravity, the flow guide hopper 3 moving downwards stretches the connecting spring 32, and the flow guide hopper 3 moving downwards also drives the ring plate 81 to move, so that the distance between the ring plate 81 and the inner bottom wall of the slow flow tank 5 is shortened, thereby the ring plate 81 moving causes the two hinged rods 82 to rotate.

[0046] The lower end of the articulated rod 82 rotates in a direction away from each other, the articulated rod 82 rotates at the same time to drive the mounting block 73 to move, the mounting block 73 moves to drive the sliding block 74 to move along the sliding groove 53, and the reset spring 84 is further compressed at the same time, the mounting block 73 moves to drive the supporting rod 72 and the scraper 71 to move, so that the two scrapers 71 move away from each other; the scraper 71 moves to scrape the silt attached to the calm flow surface 51 to the edge of the calm flow surface 51, so that the silt can fall into the settling tank 24 for sedimentation, reducing the situation that the water slaps the silt on the calm flow surface 51 when the next round of water is poured, so that the water in the upper part of the treatment box 2 is as clear as possible, reducing the amount of silt discharged to the outside, reducing the adverse effects on the external environment.

[0047] The guide hopper 3 moves to drive the limiting block 31 to move in the limiting groove 23, the limiting block 31 cooperates with the limiting groove 23 to make the guide hopper 3 move in the axial direction of the treatment box 2 without rotating, since the ring plate 81 is threadedly connected with the filter barrel 6, the downward movement of the guide hopper 3 drives the ring plate 81 to move downward, and the ring plate 81 moves to drive the filter barrel 6 to rotate; the rotation of the filter barrel 6 forms a water flow vortex at the axis of the filter barrel 6, and the water in the guide hopper 3 accelerates under the action of the water flow vortex, so that the water in the guide hopper 3 can be quickly discharged.

[0048] When the water in the guide hopper 3 reduces to a certain amount, the connecting spring 32 restores the deformation to drive the guide hopper 3 and the ring plate 81 to move upward, so that the filter barrel 6 reversely rotates to form a new water flow vortex to accelerate the water flow speed in the guide hopper 3 and reduce the accumulation of water in the guide hopper 3; the upward movement of the guide hopper 3 drives the lower ends of the two articulated rods 82 to rotate in a direction close to each other, and the reset spring 84 restores the deformation at the same time, so as to drive the mounting block 73 to move until the mounting block 73 abuts against the top rod 83, and the top rod 83 limits the movement of the mounting block 73, so that when the guide hopper 3 returns to the initial position, the lower ends of the two articulated rods 82 are still directed away from each other.

[0049] When the guide hopper 3 returns to the initial position, the filter barrel 6 no longer rotates, and after the water flow vortex disappears, the water can continue to accumulate in the guide hopper 3 as the water continues to flow in, so as to drive the scraper 71 to scrape the silt on the calm flow surface 51 into the settling tank 24 again; the rotation of the filter barrel 6 enables the guide hopper 3 to return to the original position more quickly, thereby increasing the frequency of the scraper 71 cleaning the calm flow surface 51, further reducing the situation that the silt on the calm flow surface 51 is stirred up, and reducing the amount of impurities in the water in the upper part of the treatment box 2. A manhole is formed in the lower side wall of the treatment box 2, and a door for sealing the manhole is hinged to the side wall of the treatment box 2, so that the operator can enter the inside of the treatment box 2 through the manhole, thereby cleaning the inside of the treatment box 2.

[0050] The implementation principle of the building foundation pit drainage system in the embodiment of the application is as follows: when water in the foundation pit needs to be cleaned, the water enters the water collecting well 1, an operator starts the water pump 211, the water flows into the flow guide hopper 3 along the water inlet pipe 21, the sieve plate 4 and the flow guide plate 41 filter the water, the water in the flow guide hopper 3 gradually increases, the flow guide hopper 3 moves downward and stretches the connecting spring 32, the flow guide hopper 3 moves downward at the same time to drive the filtering barrel 6 to rotate, the flow guide hopper 3 also drives the hinged rod 82 to rotate, the hinged rod 82 rotates to move the scraper 71 to scrape the silt deposited on the slow flow surface 51 into the settling groove 24; as the filtering barrel 6 rotates, the water in the flow guide hopper 3 is accelerated to be discharged, when the water in the flow guide hopper 3 is discharged to a certain amount, the connecting spring 32 restores the deformation to move the flow guide hopper 3 upward, when the flow guide hopper 3 moves to the initial position, the hinged rod 82 and the scraper 71 restore to the initial position, the water is settled in the treatment box 2, and the clarified water on the upper portion of the treatment box 2 is discharged to the outside along the water outlet pipe 22.

[0051] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A building foundation pit drainage system comprising a plurality of open ditches (11) excavated on the inner bottom wall of the foundation pit and a catch basin (1), characterized in that: The ground is provided with a processing box (2) corresponding to the water collecting well (1), the water collecting well (1) is provided with a water inlet pipe (21), the water inlet pipe (21) is fixedly communicated with the corresponding processing box (2), the water inlet pipe (21) is provided with a water pump (211), the inner bottom wall of the processing box (2) is fixedly connected with a slow flow tank (5), the upper surface of the slow flow tank (5) is a slow flow surface (51), the outer side wall of the slow flow tank (5) and the inner side wall of the processing box (2) form a settling tank (24), the processing box (2) is further fixedly communicated with a water outlet pipe (22), the water outlet pipe (22) is located between the water inlet pipe (21) and the slow flow surface (51), the processing box (2) is provided with a sieve plate (4), and the sieve plate (4) is located between the water inlet pipe (21) and the water outlet pipe (22); The processing box (2) is provided with a cleaning assembly (7) for cleaning the settled silt on the slow flow surface (51); The cleaning assembly (7) comprises two scrapers (71) arranged on the slow flow tank (5), the lower surface of the scraper (71) is in contact with the slow flow surface (51), the mutually close surfaces of the two scrapers (71) are attached, the lower surface of the scraper (71) is fixedly connected with a support rod (72), the slow flow surface (51) is provided with a sliding hole (52) corresponding to the support rod (72), the length direction of the sliding hole (52) is arranged along the radial direction of the water collecting well (1), each support rod (72) is slidingly inserted into the corresponding sliding hole (52), the lower end of the support rod (72) extends into the slow flow tank (5), the lower end of each support rod (72) is fixedly connected with a mounting block (73), the mounting block (73) is slidingly connected to the inner bottom wall of the slow flow tank (5), the movement direction of the mounting block (73) is arranged along the length direction of the sliding hole (52), and the processing box (2) is further provided with a driving assembly (8) for driving the two scrapers (71) to move; The processing box (2) is slidingly connected with a flow guide hopper (3), the flow guide hopper (3) slides along the axial direction of the processing box (2), the inner diameter of the upper end of the flow guide hopper (3) is greater than the inner diameter of the lower end of the flow guide hopper (3), a plurality of connecting springs (32) are fixedly connected to the upper end face of the flow guide hopper (3), the plurality of connecting springs (32) are distributed along the circumferential direction of the flow guide hopper (3), the upper end of the connecting spring (32) is fixedly connected to the inner side wall of the processing box (2), the sieve plate (4) is fixedly connected to the inner side wall of the flow guide hopper (3), the driving assembly (8) comprises a hinge rod (82) hinged to the upper surface of each mounting block (73), the hinge rod (82) is inserted into the corresponding sliding hole (52), the lower ends of the two hinge rods (82) are inclined away from each other, each scraper (71) is located between the two hinge rods (82), the upper end of the hinge rod (82) is hinged to the lower end of the flow guide hopper (3), and the side walls of the two mounting blocks (73) away from each other are fixedly connected with a reset spring (84), one end of the reset spring (84) away from the mounting block (73) is fixedly connected to the inner side wall of the slow flow tank (5).

2. A building foundation drainage system according to claim 1, wherein: The driving assembly (8) further comprises a filtering barrel (6) rotatably connected to the slow flow surface (51), a plurality of sieve holes are formed in the side wall of the filtering barrel (6), the diameter of the sieve holes on the filtering barrel (6) is smaller than that of the sieve holes on the sieve plate (4), the upper end of the filtering barrel (6) is open, the lower end surface of the flow guide hopper (3) is fixedly connected with a ring plate (81), the ring plate (81) is coaxially arranged with the flow guide hopper (3), the outer diameter of the filtering barrel (6) is smaller than the inner diameter of the ring plate (81), an external thread is formed in the outer side wall of the filtering barrel (6), an internal thread is formed in the inner side wall of the ring plate (81), the filtering barrel (6) is threadedly connected with the ring plate (81), the filtering barrel (6) is located between the two scrapers (71), and the side walls of the two scrapers (71) abut with the outer side wall of the filtering barrel (6).

3. A building foundation drainage system according to claim 1, wherein: The sieve plate (4) is fixedly connected with an annular flow guide plate (41), the flow guide plate (41) is upwardly arranged, the flow guide plate (41) is perpendicular to the sieve plate (4), and the sieve plate (4) is coaxially arranged with the flow guide plate (41).

4. A building foundation drainage system according to claim 1, wherein: The outer side wall of the flow guide hopper (3) is fixedly connected with a plurality of limiting blocks (31), the plurality of limiting blocks (31) are distributed along the circumference of the flow guide hopper (3), and the inner side wall of the treatment box (2) is formed with limiting grooves (23) corresponding to the limiting blocks (31) one by one, each limiting block (31) is slidably inserted into the corresponding limiting groove (23).

5. A building foundation drainage system according to claim 1, wherein: The inner bottom wall of the slow flow box (5) is fixedly connected with a jacking rod (83), the jacking rod (83) is located between the two mounting blocks (73), and the length direction of the jacking rod (83) is arranged along the sliding direction of the mounting block (73). Each mounting block (73) abuts with the jacking rod (83).

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