CN113585309A

CN113585309A - Building foundation pit drainage system

Info

Publication number: CN113585309A
Application number: CN202110846804.3A
Authority: CN
Inventors: 张敬材; 刘晨晖
Original assignee: Fujian Toubao Construction Engineering Co ltd
Current assignee: Fujian Toubao Construction Engineering Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2021-11-02

Abstract

The application discloses building foundation ditch drainage system relates to foundation ditch drainage technical field, has improved the problem that the sump pit collapses easily, and it includes the open drain of seting up along foundation ditch bottom edge circumference, seting up the sump pit at the bottom of the open drain ditch, stretch into the drain pipe in the sump pit and install on the foundation ditch be used for with drain connection's water pump, still including setting up the supporting mechanism in the sump pit, supporting mechanism is including the well case that props that is the rectangle structure, prop the well case and include four gussets that are the rectangle distribution and four connecting plates that are used for connecting adjacent gusset, the gusset includes two mutually perpendicular's scute, the spout has been seted up to one side that two scutes of gusset kept away from mutually, the both sides that the connecting plate is relative are provided with the locating plate. This application can be strutted the wall of a well of sump pit, conveniently props the well case simultaneously and takes out in the sump pit, realizes propping the reuse of well case.

Description

Building foundation pit drainage system

Technical Field

The application relates to the technical field of foundation pit drainage, in particular to a building foundation pit drainage system.

Background

The foundation pit is a soil pit excavated at the design position of the foundation according to the elevation of the foundation and the plane size of the foundation. When the depth of the foundation pit is below the natural underground water level, underground water can continuously infiltrate into the pit. And the groundwater that infiltrates in the foundation ditch causes the collapse of foundation ditch easily, so the drainage work of doing the foundation ditch is especially important.

The existing foundation pit drainage mode generally adopts a mode of adding a water collecting well to drain water, as shown in fig. 1, after the foundation pit 1 is excavated, an open ditch 2 is arranged on the periphery of the bottom of the foundation pit 1, and the water collecting well 3 is arranged at the bottom of the open ditch 2, so that leaked underground water is gathered in the water collecting well 3, then a drain pipe 5 is connected into the water collecting well 3 and is connected with the drain pipe 5 through a water pump 4, and water in the water collecting well 3 is pumped out of the foundation pit 1 and drained away.

With respect to the related art in the above, the inventors consider that: because the wall of a well of sump pit 3 is the soil layer structure, the in-process that groundwater or rainwater for a long time catchment in the sump pit 3 causes easily collapsing of 3 soil walls of sump pit for reserve more silt in the sump pit 3, make suction pump 4 at the in-process of drawing water, bring silt in the sump pit 3 into drain pipe 5 easily, cause the jam of drain pipe 5, reduce drainage efficiency.

Disclosure of Invention

In order to improve the problem that the sump pit easily collapses, this application provides a building foundation ditch drainage system.

The application provides a building foundation ditch drainage system adopts following technical scheme:

a building foundation pit drainage system comprises an open trench, a water collecting well, a water discharging pipe and a supporting mechanism, wherein the open trench is formed in the bottom of the open trench along the circumferential direction of the edge of the bottom of a foundation pit, the water collecting well is formed in the bottom of the open trench, the water discharging pipe extends into the water collecting well, the water pump is mounted on the foundation pit and is used for being connected with the water discharging pipe, the supporting mechanism is arranged in the water collecting well and comprises a well supporting box in a rectangular structure, the well supporting box comprises four corner supports in rectangular distribution and four connecting plates used for connecting adjacent corner supports, each corner support comprises two corner plates which are perpendicular to each other, a sliding groove is formed in one side, away from the two corner plates, of each corner support, positioning plates are arranged on two opposite sides of each connecting plate, the two positioning plates of each connecting plate are respectively and slidably connected into the sliding grooves, close to the two corner plates, of the adjacent corner supports, and limiting rings used for preventing the positioning plates from being separated from the sliding grooves are arranged at the notches of the sliding grooves;

the middle part of the outer side of the connecting plate is vertically provided with a connecting strip, one side of the connecting strip, which is far away from the connecting plate, is fixedly connected with a plugging plate which is parallel to the connecting plate and is abutted against the outer side of the angle plate, and the plugging plate is used for plugging a gap between two adjacent angle plates; the angle plate, the connecting plate and the plugging plate are all uniformly provided with water permeable holes;

the middle part of the shaft supporting box is vertically provided with an adjusting column, the middle parts of one group of two parallel connecting plates close to one side are vertically connected with first racks, the middle parts of the other group of two parallel connecting plates close to one side are vertically connected with second racks, the two first racks are parallel and are staggered up and down, and the two second racks are parallel and are staggered up and down; a cavity is formed in the adjusting column, and a second through hole for two first racks to pass through is formed in the adjusting column; a first gear used for meshing the two first racks and a second gear meshed with the two second racks are rotationally connected in the cavity;

the adjusting column is provided with a control mechanism for controlling the first gear and the second gear to synchronously rotate, and when the control mechanism drives the first gear and the second gear to synchronously rotate, the two groups of connecting plates can simultaneously move towards the direction away from each other to a supporting state that the connecting plates are abutted against the wall of the water collecting well; or the connecting plate is moved towards the approaching direction to the disassembly state that the connecting plate is separated from the wall of the water collecting well.

Through adopting above-mentioned technical scheme, the back is accomplished in the sump pit excavation, will be in the collection well is put into to prop the well case of dismantlement state, and rethread control mechanism drive main bevel gear rotates for prop the well case and strut to the support state that the connecting plate offsets with the sump pit wall of a well, thereby strut the wall of a well of sump pit, make the wall of a well of sump pit be difficult to collapse, then place the drain pipe in propping the well incasement and draw water, make the drain pipe be difficult to block up.

Optionally, the control mechanism includes a rotating shaft rotatably connected to the upper end of the adjusting column and a main bevel gear coaxially fixed on the periphery of the rotating shaft, the adjusting column is rotatably connected with a first rotating shaft and a second rotating shaft extending out of the adjusting column, the first gear is coaxially and fixedly connected with the first rotating shaft, the second gear is coaxially and fixedly connected with the second rotating shaft, one end of the first rotating shaft extending out of the adjusting column is fixedly connected with a first driven wheel, and one end of the second rotating shaft extending out of the adjusting column is provided with a second driven wheel; the upper end of the adjusting column is rotatably connected with a first driving shaft parallel to the first rotating shaft and a second driving shaft parallel to the second rotating shaft; one end of the first driving shaft is coaxially and fixedly connected with a first auxiliary bevel gear meshed with the main bevel gear, and the other end of the first driving shaft is fixedly provided with a first driving wheel; a second auxiliary bevel gear meshed with the main bevel gear is coaxially fixed at one end of the second driving shaft; a second driving wheel is fixed at the other end of the second driving shaft; and belts are in transmission connection with the first driving wheel and the first driven wheel and the second driving wheel and the second driven wheel.

Through adopting above-mentioned technical scheme, when the staff driven rotation axis rotated, the mode of rotation axis accessible drive main bevel gear drove first pair bevel gear and the rotation of second pair bevel gear for first action wheel and the synchronous rotation of second action wheel, and drive first from driving wheel and second through the belt and follow the driving wheel rotation, make first gear and second gear synchronous rotation, thereby drive two first racks and two second racks rotation.

Optionally, the control mechanism further comprises a worm wheel coaxially fixed on the rotating shaft, and the upper portion of the adjusting column is rotatably connected with a worm meshed with the worm wheel.

Through adopting above-mentioned technical scheme, through the self-locking function between worm wheel and the worm, can make and prop well case and keep in required state.

Optionally, the bottom of the corner support is fixedly connected with a bottom plate extending along the horizontal direction, and water passing holes are uniformly distributed in the bottom plate; and a supporting plate for supporting the bottom plate is arranged on the periphery of the bottom of the adjusting column.

Through adopting above-mentioned technical scheme, backup pad and bottom plate setting can make and prop and leave the clearance between the shaft bottom of well case and sump pit to reduce the frictional resistance when propping the well case shrink.

Optionally, a positioning rod fixedly connected with the angle plate is arranged on the inner side of one of the angle supports, a positioning sleeve for a water drainage pipe to pass through is arranged at the end of the positioning rod, a flange plate is arranged on the outer peripheral side of one end, far away from the water pump, of the water drainage pipe, and the diameter of the flange plate is larger than the inner diameter of the positioning sleeve.

Through adopting above-mentioned technical scheme, during the installation drain pipe, with the ring flange take to lean on the position sleeve, can make the drain pipe keep carrying out the extraction of sump pit internal water at vertical state, improved the drainage efficiency of sump pit.

Optionally, a guide rod is vertically arranged on the inner side of the connecting plate, a guide hole for the guide rod to pass through is formed in the adjusting column, and the guide rod penetrates through the guide hole.

Through adopting above-mentioned technical scheme, the stability when connecting plate activity can be improved in the setting of guide bar.

Optionally, a handle is arranged at the upper end of the corner support.

Through adopting above-mentioned technical scheme, the setting of handle can make things convenient for the staff to take out from the sump pit with propping the well case.

Optionally, the flange is fixed on the positioning sleeve by bolts.

Through adopting above-mentioned technical scheme, the ring flange passes through the bolt fastening on the position sleeve, can conveniently fix the drain pipe.

In summary, the present application includes at least one of the following benefits:

1. the well wall of the water collecting well can be supported, the well supporting box can be conveniently taken out of the water collecting well, and the well supporting box can be reused;

2. the setting of backup pad and bottom plate can reduce the resistance when propping the well case shrink.

Drawings

FIG. 1 is a schematic view of the overall structure of the prior art;

FIG. 2 is a schematic view of the overall structure of the present embodiment;

FIG. 3 is a schematic structural diagram of the shaft supporting box of the present embodiment;

FIG. 4 is a top view of the jackbox of the present embodiment;

FIG. 5 is a schematic structural view of the chute of the present embodiment;

FIG. 6 is a schematic structural view of the adjustment column of the present embodiment;

FIG. 7 is a schematic cross-sectional view of the jackbox of the present embodiment;

FIG. 8 is a schematic structural view of the embodiment embodying the belt;

fig. 9 is a schematic structural view of the positioning sleeve according to the present embodiment.

Description of reference numerals: 1. a foundation pit; 2. opening the ditch; 3. a water collecting well; 4. a water pump; 5. a drain pipe; 6. a well supporting box; 7. corner brace; 8. a connecting plate; 9. a gusset; 10. a chute; 11. positioning a plate; 12. a limiting ring; 13. a connecting strip; 14. a plugging plate; 15. water permeable holes; 16. an adjustment column; 17. a first rack; 18. a second rack; 19. a first through hole; 20. a second through hole; 21. a first gear; 22. a second gear; 23. a main bevel gear; 24. a first rotating shaft; 25. a second rotating shaft; 26. a first drive wheel; 27. a second drive wheel; 28. a first driven wheel; 29. a second driven wheel; 30. a first drive shaft; 31. a second drive shaft; 32. a hinged seat; 33. a first secondary bevel gear; 34. a second pair of bevel gears; 35. a belt; 36. a guide bar; 37. a guide hole; 38. a worm gear; 39. a worm; 40. a base plate; 41. a support plate; 42. water passing holes; 43. positioning a rod; 44. a positioning sleeve; 45. a flange plate; 46. a bolt; 47. a handle; 48. a rotating shaft.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the application discloses a building foundation ditch drainage system. Referring to fig. 2 and 3, the foundation pit drainage system comprises an open trench 2 formed along the circumferential direction of the bottom edge of the foundation pit 1, a water collecting well 3 formed at the bottom of the open trench 2, a water pump 4 installed at the upper end of the foundation pit 1, a drainage pipe 5 connected with a water inlet of the water pump 4 and a supporting mechanism arranged in the water collecting well 3, wherein one end of the drainage pipe 5 extends into the water collecting well 3 and is used for extracting underground water in the water collecting well 3. The supporting mechanism is used for supporting the wall of the water collecting well 3, so that the wall of the water collecting well 3 is not easy to collapse.

Referring to fig. 3 and 4, the supporting mechanism includes a well supporting box 6 having a rectangular structure, and the well supporting box 6 includes four corner supports 7 distributed in a rectangular shape and four connecting plates 8 for connecting the corner supports 7. The corner brace 7 comprises two corner plates 9 which are perpendicular to each other, and the corner plates 9 of adjacent corner braces 7 are oppositely arranged.

Specifically, referring to fig. 4 and 5, the two corner plates 9 are provided with a sliding groove 10 at a side away from each other for slidably connecting the connecting plates 8. Two opposite long sides of the connecting plate 8 are provided with positioning plates 11, and the connecting plate 8 is slidably connected in the sliding groove 10 through the positioning plates 11. Namely, the two positioning plates 11 of the connecting plate 8 are respectively and slidably connected in the sliding grooves 10 of the two angle plates 9 opposite to the adjacent angle supports 7. The notch of the chute 10 is welded or in interference clamping with a limiting ring 12 for preventing the positioning plate 11 from separating from the chute 10. Adjacent gussets 7 are connected by a web 8 and are movable in opposite or opposite directions.

Referring to fig. 4 and 5, a connecting strip 13 extending along the length direction of the connecting plate 8 is arranged in the middle of one side of the connecting plate 8 far away from the shaft supporting box 6, one end of the connecting strip 13 far away from the connecting plate 8 is fixedly connected with a plugging plate 14 parallel to the connecting plate 8, the plugging plate 14 is abutted to two adjacent angle plates 9, and a gap between the two angle plates 9 is plugged, so that soil on the wall of the water collecting well 3 is not easy to enter between the two adjacent angle plates 9. In order to make the underground water seep into the shaft supporting box 6, the angle plate 9, the connecting plate 8 and the plugging plate 14 are all provided with water permeable holes 15.

Referring to fig. 6 and 7, the middle part of the shaft supporting box 6 is vertically provided with an adjusting column 16, the middle parts of one group of two parallel connecting plates 8 close to one side are vertically connected with a first rack 17, the middle parts of the other group of two parallel connecting plates 8 close to one side are vertically connected with a second rack 18, the two first racks 17 are arranged in parallel and staggered up and down, and the two second racks 18 are arranged in parallel and staggered up and down. The adjusting column 16 is provided with a second through hole 20 for the two first racks 17 to pass through the first through hole 19 and the two second racks 18 to pass through. The interior of the adjustment column 16 is provided with a cavity in which a first gear 21 for meshing the two first racks 17 and a second gear 22 for meshing the two second racks 18 are rotatably connected.

Referring to fig. 6 and 7, the adjusting column 16 is provided with a control mechanism, the control mechanism can control the first gear 21 and the second gear 22 to synchronously rotate, when the first gear 21 and the second gear 22 rotate in one direction under the action of the control mechanism, the two groups of connecting plates 8 can simultaneously move in the direction close to the adjusting column 16, so that the well supporting box 6 is reduced and separated from the wall of the water collecting well 3, and the well supporting box 6 is in a disassembly state convenient to take out from the water collecting well 3; when the first gear 21 and the second gear 22 rotate towards the other direction under the action of the control mechanism, the two groups of connecting plates 8 can move towards the direction away from the adjusting column 16 at the same time, so that the well supporting box 6 is expanded and abuts against the wall of the water collecting well 3, and a supporting state for supporting the wall of the water collecting well 3 is formed.

Further, referring to fig. 7 and 8, the control mechanism includes a rotating shaft 48 rotatably connected to the upper end of the adjusting column 16 and a main bevel gear 23 coaxially fixed on the periphery of the rotating shaft 48, and the rotating shaft 48 is rotatably connected to the upper end of the adjusting column 16 through a bearing. The adjusting column 16 is rotatably connected with a first rotating shaft 24 and a second rotating shaft 25 which extend out of the adjusting column 16, the first gear 21 is coaxially and fixedly connected with the first rotating shaft 24, and the second gear 22 is coaxially and fixedly connected with the second rotating shaft 25. A first driven wheel 28 is fixedly connected to one end of the first rotating shaft 24 extending out of the adjusting column 16, and a second driven wheel 29 is arranged at one end of the second rotating shaft 25 extending out of the adjusting column 16.

Referring to fig. 6 and 8, a first driving shaft 30 parallel to the first rotating shaft 24 and a second driving shaft 31 parallel to the second rotating shaft 25 are rotatably connected to the upper end of the adjusting column 16. Specifically, the adjusting column 16 is provided with a hinge seat 32 for rotatably connecting the first driving shaft 30 and the second driving shaft 31, and the first driving shaft 30 and the second driving shaft 31 are rotatably connected with the hinge seat 32 through a bearing. One end of the first driving shaft 30 is coaxially and fixedly connected with a first secondary bevel gear 33 meshed with the main bevel gear 23, and the other end of the first driving shaft 30 is fixedly provided with a first driving wheel 26; a second sub bevel gear 34 engaged with the main bevel gear 23 is coaxially fixed to one end of the second drive shaft 31; the other end of the second driving shaft 31 is fixed with a second driving wheel 27; belts 35 are connected between the first driving wheel 26 and the first driven wheel 28 and between the second driving wheel 27 and the second driven wheel 29 in a transmission manner.

When the worker rotates the rotating shaft 48, the rotating shaft 48 drives the main bevel gear 23 to rotate, and drives the first secondary bevel gear 33 and the second secondary bevel gear 34 to rotate, so that the first driving wheel 26 and the second driving wheel 27 rotate, the first driving wheel 26 and the second driving wheel 27 respectively drive the first driven wheel 28 and the second driven wheel 29 to rotate through the belt 35, the first gear 21 and the second gear 22 synchronously rotate, the first rack 17 and the second rack 18 are driven to slide in the through hole, and the corresponding connecting plates 8 are driven to move towards the direction close to or away from each other.

Referring to fig. 7, in order to improve the stability of the connecting plate 8 during sliding, a guide rod 36 is vertically arranged inside the connecting plate 8, a guide hole 37 for the guide rod 36 to pass through is formed in the adjusting column 16, and the guide rod 36 is arranged in the guide hole 37 in a penetrating manner.

Referring to fig. 6, the control mechanism further includes a worm wheel 38, the worm wheel 38 being coaxially fixed to an upper end of the rotary shaft 48, and a worm 39 engaged with the worm wheel 38 being rotatably coupled to an upper end of one of the hinge seats 32. The engagement between the worm wheel 38 and the worm 39 satisfies the self-locking parameter, so that the worm 39 and the worm wheel 38 have the self-locking function.

Referring to fig. 7, a bottom plate 40 extending in the horizontal direction is disposed at the bottom of the corner support 7, water through holes 42 are uniformly distributed in the bottom plate 40, a supporting plate 41 for supporting the bottom plate 40 is fixed on the outer periphery of the bottom of the adjusting column 16, the bottom plate 40 abuts against the upper end face of the supporting plate 41, so that when the supporting plate 41 abuts against the bottom of the water collecting well 3, a certain gap is left between the bottom plate 40 and the bottom of the water collecting well 3, and resistance when the well supporting box 6 contracts inwards is reduced.

Referring to fig. 9, in order to fix the drain pipe 5 in the well supporting box 6, a positioning rod 43 parallel to the bottom plate 40 is fixed on the inner side of one of the corner supports 7, a positioning sleeve 44 for drainage to pass through is fixed on the end of the positioning rod 43, the part of the drain pipe 5 extending into the water collecting well 3 is of a rigid structure, a flange 45 is arranged on the outer peripheral side of one end of the drain pipe 5 away from the water pump 4, the diameter of the flange 45 is larger than the inner diameter of the positioning sleeve 44, a plurality of through holes are formed in the flange 45, a threaded hole is formed in the upper end face of the positioning sleeve 44, when the flange 45 abuts against the upper end face of the positioning sleeve 44, the end of the drain pipe 5 is close to the bottom plate 40 but does not contact with the bottom plate 40, so that the drain pipe 5 can more quickly extract water in the water collecting well 3. Meanwhile, the flange 45 can be fixedly connected with the positioning sleeve 44 by means of bolts 46 which pass through the through holes and are screwed into the threaded holes.

Referring to fig. 9, in order to facilitate the worker to take out the shaft supporting box 6, a handle 47 is provided at the upper end of the corner support 7.

The implementation principle of the building foundation pit drainage system in the embodiment of the application is as follows:

after the excavation of the water collecting well 3 is completed, the well supporting box 6 in the contraction state is placed into the water collecting well 3, then the worm 39 is rotated, so that the well supporting box 6 is supported to the supporting state that the connecting plate 8 is abutted against the wall of the water collecting well 3, then the drain pipe 5 is fixed on the positioning sleeve 44, the drain pipe 5 and the water pump 4 are convenient to extract water in the water collecting well 3, and the possibility that the drain pipe 5 is blocked is reduced.

When retrieving and propping well case 6, the contra-rotation worm 39, prop well case 6 orientation this moment and adjust the direction shrink of post 16 for connecting plate 8 and angle brace 7 separate with the wall of a well of water collecting well 3, thereby make things convenient for the staff to prop well case 6 and take out reuse in the water collecting well 3.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a building foundation ditch drainage system, includes open drain (2) of seting up along foundation ditch (1) bottom edge circumference, sets up sump pit (3) at the bottom of open drain (2) ditch, stretches into drain pipe (5) in sump pit (3) and install on foundation ditch (1) be used for water pump (4) be connected with drain pipe (5), its characterized in that: the support device is characterized by further comprising a support mechanism arranged in the water collecting well (3), the support mechanism comprises a well supporting box (6) which is of a rectangular structure, the well supporting box (6) comprises four corner supports (7) which are distributed in a rectangular shape and four connecting plates (8) which are used for connecting the adjacent corner supports (7), each corner support (7) comprises two corner plates (9) which are perpendicular to each other, a sliding groove (10) is formed in one side, away from each other, of each two corner plates (9) of each corner support (7), positioning plates (11) are arranged on two opposite sides of each connecting plate (8), the two positioning plates (11) of each connecting plate (8) are respectively connected in the two sliding grooves (10), close to the corresponding corner plates (9), of the adjacent corner supports (7) in a sliding mode, and a limiting ring (12) used for preventing the positioning plates (11) from being separated from the sliding grooves (10) is arranged at the notch of each sliding groove (10);

a connecting strip (13) is vertically arranged in the middle of the outer side of the connecting plate (8), one side, far away from the connecting plate (8), of the connecting strip (13) is fixedly connected with a plugging plate (14) which is parallel to the connecting plate (8) and is abutted against the outer side of the angle plate (9), and the plugging plate (14) is used for plugging a gap between every two adjacent angle plates (9); the angle plate (9), the connecting plate (8) and the plugging plate (14) are all provided with water permeable holes (15) uniformly;

the middle part of the well supporting box (6) is vertically provided with an adjusting column (16), the middle parts of one group of two parallel connecting plates (8) close to one side are vertically connected with first racks (17), the middle parts of the other group of two parallel connecting plates (8) close to one side are vertically connected with second racks (18), the two first racks (17) are parallel and are arranged in a vertically staggered manner, and the two second racks (18) are parallel and are arranged in a vertically staggered manner; a cavity is arranged inside the adjusting column (16), and a second through hole (20) for two first racks (17) to pass through a first through hole (19) and two second racks (18) to pass through is formed in the adjusting column (16); a first gear (21) used for meshing the two first racks (17) and a second gear (22) meshed with the two second racks (18) are rotationally connected in the cavity;

the adjusting column (16) is provided with a control mechanism for controlling the first gear (21) and the second gear (22) to synchronously rotate, and when the control mechanism drives the first gear (21) and the second gear (22) to synchronously rotate, the two groups of connecting plates (8) can simultaneously move towards the direction away from each other to a supporting state that the connecting plates (8) are abutted against the wall of the water collecting well (3); or move towards the approaching direction to the disassembly state that the connecting plate (8) is separated from the wall of the water collecting well (3).

2. The system of claim 1, wherein: the control mechanism comprises a rotating shaft (48) which is rotatably connected to the upper end of the adjusting column (16) and a main bevel gear (23) which is coaxially fixed on the peripheral side of the rotating shaft (48), a first rotating shaft (24) and a second rotating shaft (25) which extend out of the adjusting column (16) are rotatably connected in the adjusting column (16), the first gear (21) is coaxially and fixedly connected with the first rotating shaft (24), the second gear (22) is coaxially and fixedly connected with the second rotating shaft (25), one end of the first rotating shaft (24) extending out of the adjusting column (16) is fixedly connected with a first driven wheel (28), and one end of the second rotating shaft (25) extending out of the adjusting column (16) is provided with a second driven wheel (29); the upper end of the adjusting column (16) is rotatably connected with a first driving shaft (30) parallel to the first rotating shaft (24) and a second driving shaft (31) parallel to the second rotating shaft (25); one end of the first driving shaft (30) is coaxially and fixedly connected with a first auxiliary bevel gear (33) meshed with the main bevel gear (23), and the other end of the first driving shaft (30) is fixedly provided with a first driving wheel (26); a second secondary bevel gear (34) meshed with the main bevel gear (23) is coaxially fixed at one end of the second driving shaft (31); a second driving wheel (27) is fixed at the other end of the second driving shaft (31); and belts (35) are in transmission connection between the first driving wheel (26) and the first driven wheel (28) and between the second driving wheel (27) and the second driven wheel (29).

3. The system of claim 2, wherein: the control mechanism further comprises a worm wheel (38) coaxially fixed on the rotating shaft (48), and a worm (39) meshed with the worm wheel (38) is rotatably connected to the upper portion of the adjusting column (16).

4. A drainage system for a foundation pit of a building as claimed in claim 3, wherein: the bottom of the angle brace (7) is fixedly connected with a bottom plate (40) extending along the horizontal direction, and water through holes (42) are uniformly distributed in the bottom plate (40); and a supporting plate (41) for supporting the bottom plate (40) is arranged on the periphery of the bottom of the adjusting column (16).

5. The system of claim 4, wherein: a positioning rod (43) fixedly connected with the angle plate (9) is arranged on the inner side of one of the angle supports (7), a positioning sleeve (44) for a water drainage pipe (5) to penetrate through is arranged at the end part of the positioning rod (43), a flange plate (45) is arranged on the outer peripheral side of one end, away from the water pump (4), of the water drainage pipe (5), and the diameter of the flange plate (45) is larger than the inner diameter of the positioning sleeve (44).

6. The system of claim 5, wherein: the inner side of the connecting plate (8) is vertically provided with a guide rod (36), the adjusting column (16) is provided with a guide hole (37) for the guide rod (36) to pass through, and the guide rod (36) penetrates through the guide hole (37).

7. The system of claim 1, wherein: the upper end of the angle support (7) is provided with a handle (47).

8. The system of claim 5, wherein: the flange plate (45) is fixed on the positioning sleeve (44) through bolts (46).