CN116676995A - An automatic speed-regulating drainage device for foundation pits in high-water level areas - Google Patents

Abstract

The embodiment of the invention discloses an automatic speed regulation drainage device for a foundation pit in a high water level area, which relates to the technical field of foundation pit drainage and comprises a casing, wherein a water pump is fixedly arranged at the bottom end inside the casing, a first water inlet component is fixedly arranged at the bottom end of the casing, the first water inlet component comprises a hollow plate fixedly arranged at the bottom end of the casing through a connecting plate, a second water inlet component is arranged at the top of the casing, the second water inlet component comprises an outer water inlet pipe arranged at the top of the casing, an inner water inlet pipe is arranged at one end of the outer water inlet pipe, a driving component for driving the outer water inlet pipe to rotate is arranged at the top inside the casing, and an automatic speed regulation component is arranged at the rear side of the casing. The invention can automatically adjust the rotating speed of the water pump according to the water level so as to adapt to the water drainage work of different water levels in the foundation pit in the high water level area, and change the position of the inner water inlet pipe, thereby avoiding the water impurity from gathering at the inner water inlet pipe due to water absorption at one position for a long time and ensuring the water drainage efficiency.

Description

An automatic speed-regulating drainage device for foundation pits in high-water level areas

technical field

The embodiment of the present invention relates to the technical field of foundation pit drainage, in particular to an automatic speed-regulating drainage device for foundation pits in high water level areas.

Background technique

The foundation pit is an earth pit excavated at the foundation design position according to the base elevation and foundation plane size. During the excavation of the foundation pit, when the bottom of the foundation pit is lower than the groundwater level, the groundwater will continue to flow due to the cut off of the soil aquifer. Infiltration into the foundation pit, if no effective measures are taken to drain water and lower the groundwater level, not only will the construction conditions deteriorate, but also the foundation pit will cause the decline of the bearing capacity of the foundation and the collapse of the side slope after the foundation pit is soaked in water, which will also affect the bearing capacity of the foundation .

Especially for areas with high water levels, in order to ensure project quality and construction safety, drainage measures must be taken before or during the excavation of the foundation pit to keep the bottom of the foundation pit dry during excavation. For example, the prior art publication number is CN112302040A relates to an automatic speed-regulating drainage device for building foundation pits in areas where heavy rainfall occurs frequently.

But the above-mentioned prior art only uses drainage pipes for drainage, and the drainage pipes have been in one position for a long time to absorb water, causing a large number of impurities in the water to gather in the drainage pipes. Although there is a cleaning rod at the drainage pipes to clean up the impurities attached to the drainage pipes, However, the impurities will still be near the drainage pipes, and the accumulation of impurities for a long time will inevitably lead to blockage of the drainage pipes and lower drainage efficiency.

Contents of the invention

For this reason, the embodiment of the present invention provides an automatic speed-regulating drainage device for foundation pits in high-water level areas to solve the problem of long-term accumulation of impurities in the drainage pipeline in the prior art due to long-term absorption of water in one position, which will cause the drainage pipeline to Blockage, a problem that reduces drainage efficiency.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: an automatic speed-regulating drainage device for foundation pits in high-water level areas, including a casing, the bottom of the casing is fixed with a water pump, and the casing The bottom end is fixed with a first water inlet assembly. The first water inlet assembly includes a hollow plate fixed at the bottom end of the casing through a connecting plate. The bottom end of the hollow plate is provided with a plurality of first filter tubes communicating with the inner cavity of the hollow plate. hole;

The top of the casing is provided with a second water inlet assembly, the second water inlet assembly includes an outer water inlet pipe arranged on the top of the casing, one end of the outer water inlet pipe is provided with an inner water inlet pipe, and the inner water inlet pipe is close to the outer water inlet pipe. One end of the water inlet pipe extends into the interior of the outer water inlet pipe and is slidably connected with the outer water inlet pipe. The inner water inlet pipe is arranged on one side of the casing, and the top of the casing is provided with a driving assembly for driving the rotation of the outer water inlet pipe, and the driving The assembly is arranged on the top of the water pump, and the bottom of the outer end of the casing is fixed with a fixed ring for driving the expansion and contraction of the inner water inlet pipe.

Further, the water inlet pipe of the water pump is in fixed communication with the outside of the hollow plate through the first water inlet connecting pipe, and the first water inlet connecting pipe runs through the bottom end of the casing.

Further, the drive assembly includes a circular shell fixed at the center of the top end inside the casing, a rotary tube is arranged inside the circular shell, and the bottom end of the rotary tube is rotatably connected to the bottom end of the circular shell through a sealed bearing. The top of the rotating tube extends out of the top of the casing and is rotationally connected with the casing through a sealed bearing, and the top of the rotating tube is fixed at the bottom of the external water inlet pipe;

The outer end of the rotating tube is fixed with a plurality of blades, and the blades are arranged inside the circular shell, and the outlet pipe of the water pump is fixed with a water outlet connecting pipe, and the water outlet connecting pipe is fixed on one side of the front end of the circular shell and It communicates with the inside of the circular shell, and the outlet pipe is facing the blade;

The outer end of the circular shell is fixed with a drainpipe for draining water, and the drainpipe runs through the other side of the casing and extends out of the casing.

Further, the bottom end of the rotating tube is fixed with a connecting pipe, the connecting pipe runs through the bottom end of the circular shell, the connecting pipe is connected to the water inlet pipe of the water pump through the second water inlet connecting pipe, and the connecting pipe is connected to the second water inlet pipe. The water inlet connecting pipe is rotatably connected by a sealed bearing, and the second water inlet connecting pipe, the connecting pipe, the rotating pipe, the outer water inlet pipe and the inner water inlet pipe are sequentially connected;

The water inlet pipe of the water pump, the second water inlet connecting pipe, and the first water inlet connecting pipe are connected through a three-way joint.

Further, the end of the inner water inlet pipe far away from the outer water inlet pipe is fixed with a filter screen, and the outer side of the inner water inlet pipe close to the outer water inlet pipe is fixed with a limit ring, and the limit ring and the outer water inlet pipe are close to the inner water inlet pipe. A first spring is fixed between the inner wall at one end of the inner water inlet pipe, and the first spring is arranged outside the inner water inlet pipe;

A sealing ring for sealing the gap between the inner water inlet pipe and the outer water inlet pipe is provided.

Further, the outer end of the fixing ring is provided with a plurality of protrusions and a plurality of grooves, and the protrusions and grooves are distributed alternately.

Further, the automatic speed regulation assembly includes a fixed pipe fixed on the rear side inside the casing, the bottom end of the fixed pipe is fixedly connected with a first inlet pipe, and the first inlet pipe extends out of the bottom end of the casing, so The bottom end of the first inlet pipe is fixedly connected with the second inlet pipe, and the outer end of the second inlet pipe is provided with a plurality of second filter holes communicating with its inner cavity, and the first inlet pipe and the second inlet pipe are both located at On the rear side of the hollow plate, a floating ball is placed inside the casing.

Further, the inside of the fixed tube is provided with a movable plate, and the movable plate is arranged on the top of the floating ball, the top of the movable plate is provided with a movable rod, one end of the movable rod is fixedly connected to the top of the movable plate, and the other end of the movable rod penetrates Fix the top of the tube, the top of the casing, and extend around the top of the casing to the rear of the casing;

The other end of the movable rod is fixed with a rack, and one side of the rack is meshed with a gear;

The rear side of the casing is embedded with a control box for controlling the water pump, and the rear end of the control box is provided with a speed regulating knob for adjusting the speed of the water pump, and the speed regulating knob is arranged on the rear side of the casing, and the gear is fixed on the Rear end of speed control knob;

A second spring is provided on the outside of the movable rod, and the second spring is fixedly connected between the top of the movable plate and the inner top of the fixed tube.

Further, the rear end of the control box is fixed with a protective shell, and the protective shell is arranged on the outside of the speed regulating knob, rack, and gear to protect the speed regulating knob, rack, and gear. Hinged with airtight door;

The movable rod runs through the top of the protective shell and is movably connected with the protective shell. Sealing rings are arranged between the tops of the shells.

Further, three sets of fixing components are fixed on the outer side of the bottom end of the casing to fix the casing in the foundation pit in the high water level area;

Each set of fixing components includes a plunger fixed to the bottom end of the casing, the plunger is inserted into the foundation pit in a high water level area, and the outer end of the plunger is fixed with a limiting plate.

Embodiments of the present invention have the following advantages:

1. Through the water pump, the hollow plate, the inner water inlet pipe and the outer water inlet pipe absorb the water in the foundation pit, and at the same time drive the component to drive, the outer water inlet pipe rotates to drive the inner water inlet pipe to rotate around the casing, and at the same time the inner water inlet pipe expands and contracts, thereby changing the inner The position of the water inlet of the water inlet pipe prevents the inner water inlet pipe from being in one position for a long time to absorb water, causing a large amount of impurities in the water to gather at the inner water inlet pipe to ensure drainage efficiency;

2. When the water level in the foundation pit is high, the floating ball rises to make the movable plate move upward to drive the movable rod and the rack to move upward, the rack drives the gear to rotate, and the gear rotates to drive the speed regulating knob to rotate, thereby increasing the speed of the water pump and improving the pump speed. Drainage efficiency, when the water level in the foundation pit becomes low, the speed control knob is rotated to reduce the speed of the water pump. The invention can automatically adjust the speed of the water pump according to the water level to adapt to the drainage work of different water levels in the foundation pit in high water level areas.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that are required in the description of the embodiments or the prior art. Apparently, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creative work.

The structures, proportions, sizes, etc. shown in this manual are only used to cooperate with the content disclosed in the manual, so that people familiar with this technology can understand and read, and are not used to limit the conditions for the implementation of the present invention, so there is no technical In the substantive meaning above, any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the functions and objectives of the present invention. within the range that can be covered.

Fig. 1 is the overall structure schematic diagram provided by the present invention;

Fig. 2 is the overall bottom view provided by the present invention;

Fig. 3 is the overall rear view provided by the present invention;

Figure 4 is an overall top view provided by the present invention;

Figure 5 is a sectional view provided by the present invention;

Figure 6 is a front sectional view provided by the present invention;

Figure 7 is an enlarged view of part A in Figure 6 provided by the present invention;

Fig. 8 is a structure diagram of the outer water inlet pipe, the inner water inlet pipe, the limit ring and the first spring provided by the present invention;

Fig. 9 is a front view of the casing and the automatic speed regulating assembly provided by the present invention;

Fig. 10 is the front sectional view of Fig. 9 provided by the present invention;

Fig. 11 is the rear view of Fig. 9 provided by the present invention;

Fig. 12 is a structural diagram of Fig. 11 provided by the present invention without the protective shell and the airtight door;

In the figure: 1 casing, 2 water pump, 3 connecting plate, 4 hollow plate, 5 first water inlet connecting pipe, 6 second water inlet component, 7 automatic speed regulation component, 8 fixed component, 9 control box, 10 speed regulation knob;

61 outer water inlet pipe, 62 inner water inlet pipe, 63 round shell, 64 rotating pipe, 65 second water inlet connecting pipe, 66 connecting pipe, 67 blade, 68 water outlet connecting pipe, 69 limit ring, 610 first spring, 611 Fixed ring, 612 filter screen, 613 drain pipe;

71 fixed pipe, 72 floating ball, 73 first inlet pipe, 74 second inlet pipe, 75 movable rod, 76 rack, 77 gear, 78 movable plate, 79 second spring, 710 protective shell, 711 sealed door;

81 insertion rods, 82 limit plates.

Detailed ways

The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one

As shown in Figures 1-6, the present invention provides an automatic speed-regulating drainage device for foundation pits in high-water level areas, including a casing 1, and three groups are fixed on the outside of the bottom of the casing 1 to fix the casing 1 at a high water level The fixing components 8 in the regional foundation pit, each set of fixing components 8 all include an insertion rod 81, the insertion rod 81 is fixed at the bottom end of the casing 1, and the insertion rod 81 is inserted in the foundation pit in a high-water level area, and the insertion rod 81 is The end is fixed with a limiting plate 82 .

The bottom end of the casing 1 is fixed with a water pump 2, and the bottom end of the casing 1 is fixed with a first water inlet assembly, and the first water inlet assembly includes a hollow plate fixed at the bottom end of the casing 1 through a connecting plate 3 4. The bottom end of the hollow plate 4 is provided with a plurality of first filter holes communicating with the inner cavity of the hollow plate 4, the water inlet pipe of the water pump 2 is fixedly communicated with the outside of the hollow plate 4 through the first water inlet connecting pipe 5, and The first water inlet connecting pipe 5 runs through the bottom of the casing 1 .

First insert the insert rod 81 at the bottom of the casing 1 into the bottom of the foundation pit in the high water level area until the limit plate 82 is at the bottom of the foundation pit to prevent too much insertion into the foundation pit so that the hollow plate 4 contacts the bottom of the foundation pit and causes the hollow plate 4 blockage;

Then by the water pump 2, the water in the foundation pit is sucked in the water pump 2 through the hollow plate 4 and the first water inlet connecting pipe 5, and the first filter screen offered on the hollow plate 4 can filter impurities in the water.

In order to prevent impurities from blocking the first filter screen of the hollow plate 4 and affecting the drainage efficiency, as shown in Figures 1-6, a second water inlet assembly 6 is also provided on the top of the casing 1, and the second water inlet assembly 6 includes a The outer water inlet pipe 61 on the top of the casing 1, one end of the outer water inlet pipe 61 is provided with an inner water inlet pipe 62, and the end of the inner water inlet pipe 62 close to the outer water inlet pipe 61 extends into the interior of the outer water inlet pipe 61 and connects with the outer water inlet pipe 61 Slidingly connected, the inner water inlet pipe 62 is arranged on one side of the casing 1, and the end of the inner water inlet pipe 62 away from the outer water inlet pipe 61 is fixed with a filter screen 612 to filter impurities in the water.

The top inside of the casing 1 is provided with a driving assembly for driving the rotation of the external water inlet pipe 61, and the driving assembly is arranged on the top of the water pump 2. Specifically, as shown in Figures 5-7, the driving assembly includes a drive assembly fixed inside the casing 1 The round shell 63 at the center of the top end, the inside of the round shell 63 is provided with a rotating tube 64, the bottom end of the rotating tube 64 and the bottom end of the round shell 63 are rotationally connected by a sealed bearing, and the top end of the rotating tube 64 extends out The top of the casing 1 is rotatably connected with the casing 1 through a sealed bearing, and the top of the rotating pipe 64 is fixed at the bottom of the external water inlet pipe 61 .

The bottom end of the rotating pipe 64 is fixedly provided with a connecting pipe 66, the connecting pipe 66 runs through the bottom end of the circular shell 63, the connecting pipe 66 is connected with the water inlet pipe of the water pump 2 through the second water inlet connecting pipe 65, and connected The pipe 66 is rotationally connected with the second water inlet pipe 65 through a sealed bearing, and the second water inlet pipe 65, the connecting pipe 66, the rotating pipe 64, the outer water inlet pipe 61 and the inner water inlet pipe 62 are sequentially connected, and the water pump 2 The water inlet pipe, the second water inlet connecting pipe 65, and the first water inlet connecting pipe 5 are connected by a three-way joint.

The outer end of the rotating tube 64 is fixed with a plurality of blades 67, and the blades 67 are arranged inside the circular shell 63, and the water outlet pipe of the water pump 2 is fixedly provided with a water outlet connecting pipe 68, and the water outlet connecting pipe 68 is fixed on the One side of the front end of the circular shell 63 communicates with the interior of the circular shell 63, and the water outlet connecting pipe 68 faces the blade 67. The outer end of the circular shell 63 is fixedly provided with a drain pipe 613 for draining water, and the drain pipe 613 runs through the machine. The other side of the casing 1 extends out of the casing 1 , and the drainage pipe 613 is connected to a pipeline to lead the water in the drainage pipe 613 to the outside of the foundation pit.

When working, the water in the foundation pit is sucked into the inside of the water pump 2 along the inner water inlet pipe 62, the outer water inlet pipe 61, the transfer pipe 64, the connecting pipe 66 and the second water inlet connecting pipe 65, and then the water sucked in the water pump 2 It is discharged out of the foundation pit through the water outlet connecting pipe 68, the round shell 63 and the drain pipe 613;

At the same time, the water ejected from the outlet connecting pipe 68 impacts on the blade 67, driving the blade 67 to rotate, thereby driving the rotating pipe 64 to rotate, the rotating pipe 64 to drive the connecting pipe 66 and the outer water inlet pipe 61 to rotate, and the outer water inlet pipe 61 to rotate to drive the inner water inlet pipe 61 to rotate. The water inlet pipe 62 rotates around the casing 1, thereby changing the position of the water inlet of the inner water inlet pipe 62, preventing the inner water inlet pipe 62 from being in one position for a long time to absorb water, causing a large amount of impurities in the water to gather at the inner water inlet pipe 62, and ensuring drainage efficiency.

And, as shown in FIG. 7 , a limit ring 69 is fixed on the outer side of the inner water inlet pipe 62 near one end of the outer water inlet pipe 61 , and a fixed arrangement is arranged between the limit ring 69 and the inner wall of the inner water inlet pipe 61 near the end of the inner water inlet pipe 62 . There is a first spring 610, and the first spring 610 is arranged outside the inner water inlet pipe 62 to facilitate the reset of the inner water inlet pipe 62, and a sealing ring for sealing the gap between the inner water inlet pipe 62 and the outer water inlet pipe 61 is provided .

The bottom of the outer end of the casing 1 is fixed with a fixed ring 611 for driving the inner water inlet pipe 62 to expand and contract. The inner water inlet pipe 62 is arranged on the outside of the fixed ring 611. grooves, and the protrusions and grooves are distributed alternately.

When the inner water inlet pipe 62 rotates, when the inner water inlet pipe 62 rotates to the protrusion of the fixing ring 611, the inner water inlet pipe 62 moves outward along the protrusion, thereby driving the limit ring 69 to move outward, compressing the first spring 610, when the inner water inlet pipe 62 rotates to the groove of the fixing ring 611, the inner water inlet pipe 62 and the limit ring 69 reset under the elastic force of the first spring 610, so that the inner water inlet pipe 62 can be stretched while rotating, Further change the position of the water inlet of the inner water inlet pipe 62 to prevent the inner water inlet pipe 62 from being in one position for a long time to absorb water and cause a large number of impurities in the water to gather at the inner water inlet pipe 62 to ensure drainage efficiency.

Embodiment two

As shown in Figure 9-12, a control box 9 for controlling the water pump 2 is embedded on the rear side of the casing 1, and a speed control knob 10 for adjusting the speed of the water pump 2 is provided at the rear end of the control box 9, and the speed is adjusted. The knob 10 is arranged on the rear side of the casing 1, and the rear side of the casing 1 is provided with an automatic speed regulating assembly 7 for adjusting the speed of the water pump 2 according to the water level in the foundation pit.

Specifically, the automatic speed regulating assembly 7 includes a fixed pipe 71 fixedly arranged on the rear side of the casing 1, the bottom end of the fixed pipe 71 is fixedly connected with a first inlet pipe 73, and the first inlet pipe 73 extends out At the bottom end of the casing 1, the bottom end of the first inlet pipe 73 is fixedly connected with a second inlet pipe 74, and the outer end of the second inlet pipe 74 is provided with a plurality of second filter holes communicating with its inner cavity. Both the inlet pipe 73 and the second inlet pipe 74 are arranged on the rear side of the hollow plate 4 , and a floating ball 72 is placed inside the casing 1 .

The inside of the fixed pipe 71 is provided with a movable plate 78, and the movable plate 78 is arranged on the top of the floating ball 72, the top of the movable plate 78 is provided with a movable rod 75, and one end of the movable rod 75 is fixedly connected with the top of the movable plate 78, and The other end of the movable rod 75 runs through the top of the fixed pipe 71 and the top of the casing 1, and extends around the top of the casing 1 to the rear side of the casing 1. The other end of the movable rod 75 is fixedly provided with a rack 76, and the rack 76 is a A gear 77 is engaged on the side, and the gear 77 is fixedly arranged at the rear end of the speed regulating knob 10 .

A second spring 79 is provided on the outside of the movable rod 75, and the second spring 79 is fixedly connected between the top of the movable plate 78 and the inner top of the fixed tube 71, so as to facilitate the reset of the movable plate 78.

After the casing 1 is fixed in the foundation pit, the water in the foundation pit enters the fixed pipe 71 through the second inlet pipe 74 and the first inlet pipe 73 to make the floating ball 72 rise, and the floating ball 72 rises to the point just in contact with the movable plate 78. This section water level is low water level, and water level is higher than movable plate 78 and is high water level;

When the water level is low, the personnel can control the start of the water pump 2 through an additional control switch, such as a remote control switch, to perform drainage work. At this time, the speed of the water pump 2 is fixed;

When the water level is high, the floating ball 72 rises to make the movable plate 78 move upward, compressing the second spring 79, and simultaneously drives the movable rod 75 and the rack 76 to move upward, the rack 76 drives the gear 77 to rotate, and the rotation of the gear 77 drives the speed regulating knob 10 Rotate, so that the speed of the water pump 2 is increased, and the drainage efficiency is improved;

When the water level in the foundation pit becomes low, then under the elastic force of the second spring 79, the movable plate 78, the movable rod 75, the tooth bar 76, and the gear 77 reset, so that the speed regulating knob 10 is rotated, and the rotating speed of the water pump 2 is reduced.

The invention can automatically adjust the rotating speed of the water pump 2 according to the water level, so as to adapt to the drainage work of different water levels in the foundation pit in the high water level area.

In order to protect the rack 76, the gear 77, and the speed regulating knob 10, a protective case 710 is fixed at the rear end of the control box 9, and the protective case 710 is arranged on the outside of the speed regulating knob 10, the tooth bar 76, and the gear 77 for The speed regulating knob 10 , the rack 76 and the gear 77 are protected, and the rear end of the protective shell 710 is hinged with a sealed door 711 .

The movable rod 75 runs through the top of the protective shell 710 and is movably connected with the protective shell 710. Between the outer end of the movable plate 78 and the inner wall of the fixed pipe 71, between the movable rod 75 and the top of the fixed pipe 71, between the movable rod 75 and the casing A sealing ring is provided between the top ends, between the movable rod 75 and the top of the protective shell 710, so as to prevent water in the foundation pit from entering the interior of the present invention.

Although the present invention has been described in detail with general descriptions and specific examples above, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, the modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the protection scope of the present invention.

Claims (10)

1. The utility model provides an automatic speed governing drainage device to high water level area foundation ditch usefulness, includes casing (1), the inside bottom mounting of casing (1) is equipped with water pump (2), its characterized in that: the bottom end of the shell (1) is fixedly provided with a first water inlet assembly, the first water inlet assembly comprises a hollow plate (4) fixedly arranged at the bottom end of the shell (1) through a connecting plate (3), and a plurality of first filtering holes communicated with the inner cavity of the hollow plate (4) are formed in the bottom end of the hollow plate (4);

the top of the shell (1) is provided with a second water inlet assembly (6), the second water inlet assembly (6) comprises an outer water inlet pipe (61) arranged at the top of the shell (1), one end of the outer water inlet pipe (61) is provided with an inner water inlet pipe (62), one end, close to the outer water inlet pipe (61), of the inner water inlet pipe (62) extends into the outer water inlet pipe (61) and is in sliding connection with the outer water inlet pipe (61), and the inner water inlet pipe (62) is arranged at one side of the shell (1);

the top end of the inside of the shell (1) is provided with a driving component for driving the outer water inlet pipe (61) to rotate, the driving component is arranged at the top of the water pump (2), the bottom of the outer end of the shell (1) is fixedly provided with a fixed ring (611) for driving the inner water inlet pipe (62) to stretch out and draw back, and the inner water inlet pipe (62) is arranged at the outer side of the fixed ring (611);

an automatic speed regulating component (7) is arranged at the rear side of the shell (1).

2. An automatic speed governing drainage device for foundation pit in high water level area according to claim 1, wherein: the water inlet pipe of the water pump (2) is fixedly communicated with the outer side of the hollow plate (4) through a first water inlet connecting pipe (5), and the first water inlet connecting pipe (5) penetrates through the bottom end of the shell (1).

3. An automatic speed governing drainage device for foundation pit in high water level area according to claim 2, wherein: the driving assembly comprises a round shell (63) fixedly arranged at the center of the top end inside the shell (1), a rotary pipe (64) is arranged inside the round shell (63), the bottom end of the rotary pipe (64) is rotationally connected with the bottom end of the round shell (63) through a sealing bearing, the top end of the rotary pipe (64) extends out of the top end of the shell (1) and is rotationally connected with the shell (1) through a sealing bearing, and the top end of the rotary pipe (64) is fixed at the bottom end of the outer water inlet pipe (61);

the outer end of the rotary pipe (64) is fixedly provided with a plurality of blades (67), the blades (67) are arranged inside the circular shell (63), a water outlet connecting pipe (68) is fixedly arranged on a water outlet pipe of the water pump (2), the water outlet connecting pipe (68) is fixed on one side of the front end of the circular shell (63) and is communicated with the inside of the circular shell (63), and the water outlet connecting pipe (68) faces the blades (67);

the outer end of the round shell (63) is fixedly provided with a drain pipe (613) for draining water, and the drain pipe (613) penetrates through the other side of the shell (1) and extends out of the shell (1).

4. An automatic speed governing drainage device for foundation pit in high water level area according to claim 3, wherein: the bottom end of the rotary pipe (64) is fixedly provided with a connecting pipe (66), the connecting pipe (66) penetrates through the bottom end of the circular shell (63), the connecting pipe (66) is connected with a water inlet pipe of the water pump (2) through a second water inlet connecting pipe (65), the connecting pipe (66) is rotationally connected with the second water inlet connecting pipe (65) through a sealing bearing, and the second water inlet connecting pipe (65), the connecting pipe (66), the rotary pipe (64), the outer water inlet pipe (61) and the inner water inlet pipe (62) are sequentially communicated;

the water inlet pipe of the water pump (2), the second water inlet connecting pipe (65) and the first water inlet connecting pipe (5) are connected through a three-way joint.

5. An automatic speed governing drainage device for foundation pit in high water level area according to claim 1, wherein: a filter screen (612) is fixedly arranged at one end, far away from the outer water inlet pipe (61), of the inner water inlet pipe (62), a limiting ring (69) is fixedly arranged at the outer side of one end, close to the outer water inlet pipe (61), of the inner water inlet pipe (62), a first spring (610) is fixedly arranged between the limiting ring (69) and the inner wall of one end, close to the inner water inlet pipe (62), of the outer water inlet pipe (61), and the first spring (610) is arranged at the outer side of the inner water inlet pipe (62);

a sealing ring for sealing a gap between the inner water inlet pipe (62) and the outer water inlet pipe (61) is arranged between the inner water inlet pipe and the outer water inlet pipe.

6. An automatic speed governing drainage device for foundation pit in high water level area according to claim 1, wherein: the outer end of the fixed ring (611) is provided with a plurality of bulges and a plurality of grooves, and the bulges and the grooves are distributed at intervals.

7. An automatic speed governing drainage device for foundation pit in high water level area according to claim 1, wherein: the automatic speed regulation assembly (7) comprises a fixed pipe (71) fixedly arranged at the rear side inside the casing (1), a first inlet pipe (73) is fixedly communicated with the bottom end of the fixed pipe (71), the first inlet pipe (73) extends out of the bottom end of the casing (1), a second inlet pipe (74) is fixedly communicated with the bottom end of the first inlet pipe (73), a plurality of second filtering holes communicated with the inner cavity of the second inlet pipe (74) are formed in the outer end of the second inlet pipe, the first inlet pipe (73) and the second inlet pipe (74) are all arranged at the rear side of the hollow plate (4), and floating balls (72) are arranged inside the casing (1).

8. The automatic speed governing drainage device for foundation pit of high water level area of claim 7, wherein: the movable plate (78) is arranged inside the fixed pipe (71), the movable plate (78) is arranged at the top of the floating ball (72), the top end of the movable plate (78) is provided with the movable rod (75), one end of the movable rod (75) is fixedly connected with the top end of the movable plate (78), and the other end of the movable rod (75) penetrates through the top end of the fixed pipe (71) and the top end of the casing (1) and bypasses the top end of the casing (1) to extend to the rear side of the casing (1);

a rack (76) is fixedly arranged at the other end of the movable rod (75), and a gear (77) is meshed with one side of the rack (76);

the rear side of the shell (1) is embedded with a control box (9) for controlling the water pump (2), the rear end of the control box (9) is provided with a speed regulating knob (10) for regulating the rotating speed of the water pump (2), the speed regulating knob (10) is arranged at the rear side of the shell (1), and the gear (77) is fixedly arranged at the rear end of the speed regulating knob (10);

the outside of movable rod (75) is equipped with second spring (79), second spring (79) fixed connection is between fly leaf (78) top and fixed pipe (71) inside top.

9. The automatic speed governing drainage device for foundation pit of high water level area of claim 8, wherein: a protective shell (710) is fixedly arranged at the rear end of the control box (9), the protective shell (710) is arranged outside the speed adjusting knob (10), the rack (76) and the gear (77) and used for protecting the speed adjusting knob (10), the rack (76) and the gear (77), and a sealing door (711) is hinged at the rear end of the protective shell (710);

the movable rod (75) penetrates through the top of the protective shell (710) and is movably connected with the protective shell (710), and sealing rings are arranged between the outer end of the movable plate (78) and the inner wall of the fixed pipe (71), between the movable rod (75) and the top end of the shell (1) and between the movable rod (75) and the top end of the protective shell (710).

10. An automatic speed governing drainage device for foundation pit in high water level area according to claim 1, wherein: three groups of fixing assemblies (8) for fixing the casing (1) in a foundation pit in a high water level area are fixedly arranged on the outer side of the bottom end of the casing (1);

each group of fixing components (8) comprises an inserting rod (81), the inserting rods (81) are fixed at the bottom end of the casing (1), the inserting rods (81) are inserted into foundation pits in high water level areas, and limiting plates (82) are fixedly arranged at the outer ends of the inserting rods (81).