Automatic speed-adjusting drainage device for foundation pit in high water level area

Abstract

The embodiment of the application discloses an automatic speed-adjusting drainage device for foundation pits in high-water-level areas, relates to the technical field of foundation pit drainage, and comprises a casing, a water pump is fixedly arranged at the bottom of the casing, a first water inlet assembly is fixedly arranged at the bottom of the casing, the first water inlet assembly comprises a hollow plate fixedly arranged at the bottom of the casing through a connecting plate, a second water inlet assembly is arranged at the top of the casing, the second water inlet assembly comprises an outer water inlet pipe arranged at the top of the casing, one end of the outer water inlet pipe is provided with an inner water inlet pipe, a driving assembly for driving the outer water inlet pipe to rotate is arranged at the top of the casing, and an automatic speed-adjusting assembly is arranged at the back of the casing. The water pump speed can be automatically adjusted according to the water level, so that the drainage work of different water levels in the foundation pit in the high-water-level area can be adapted, the position of the inner water inlet pipe is changed, the impurities in the water are prevented from being gathered at the inner water inlet pipe due to the fact that the inner water inlet pipe is long-term located at one position for water absorption, and the drainage efficiency is ensured.

Description

TECHNICAL FIELD

[0001] The embodiment of the application relates to the technical field of foundation pit drainage, and particularly relates to an automatic speed-adjusting drainage device for a foundation pit in a high-water-level area. BACKGROUND

[0002] A foundation pit is a soil pit excavated according to the design position of a foundation, the foundation bottom elevation and the foundation plane size. During the excavation of the foundation pit, when the foundation pit bottom is lower than the underground water level, the underground water will continuously seep into the foundation pit because the soil water-bearing layer is cut off. If effective measures are not taken to drain water and lower the underground water level, not only will the construction conditions deteriorate, but also the foundation bearing capacity will decrease and the slope will collapse after the foundation pit is soaked, which will also affect the bearing capacity of the foundation.

[0003] Especially in a high-water-level area, in order to ensure the engineering quality and construction safety, drainage measures must be taken to keep the foundation pit dry during the excavation of the foundation pit, for example, the automatic speed-adjusting drainage device for a building foundation pit in a strong-rainfall-prone area disclosed in the prior art with the publication number CN112302040A.

[0004] However, the above prior art only uses a drainage pipeline to drain water, and the drainage pipeline is in one position for a long time to absorb water, which causes impurities in the water to accumulate in the drainage pipeline. Although the drainage pipeline has a cleaning rod to clean the impurities attached to the drainage pipeline, the impurities are still near the drainage pipeline. The long-term accumulation of impurities will inevitably cause the drainage pipeline to be blocked, and the drainage efficiency is low. SUMMARY

[0005] Therefore, the embodiment of the application provides an automatic speed-adjusting drainage device for a foundation pit in a high-water-level area to solve the problem that the long-term accumulation of impurities in the drainage pipeline due to the long-term absorption of water in one position of the drainage pipeline will cause the drainage pipeline to be blocked and the drainage efficiency to be reduced.

[0006] In order to achieve the above purpose, the embodiment of the application provides the following technical scheme: an automatic speed-adjusting drainage device for a foundation pit in a high-water-level area, comprising a machine shell, a water pump is fixedly arranged at the bottom end of the machine shell, a first water inlet assembly is fixedly arranged at the bottom end of the machine shell, the first water inlet assembly comprises a hollow plate fixedly arranged at the bottom end of the machine shell through a connecting plate, and a plurality of first filter holes are formed in the bottom end of the hollow plate and communicate with the inner cavity of the hollow plate.

[0007] The top of the shell is provided with a second water inlet assembly, the second water inlet assembly comprises an outer water inlet pipe arranged on the top of the shell, one end of the outer water inlet pipe is provided with an inner water inlet pipe, the end of the inner water inlet pipe close to the outer water inlet pipe extends into the inner part of the outer water inlet pipe and is in sliding connection with the outer water inlet pipe, the inner water inlet pipe is arranged on one side of the shell, the top end of the inner part of the shell is provided with a driving assembly for driving the outer water inlet pipe to rotate, and the driving assembly is arranged on the top of the water pump, the bottom of the outer end of the shell is fixedly provided with a fixing ring for driving the inner water inlet pipe to stretch and retract, the inner water inlet pipe is arranged outside the fixing ring, and the rear side of the shell is provided with an automatic speed regulating assembly.

[0008] Further, the water inlet pipe of the water pump is fixedly communicated with the outside of the hollow plate through a first water inlet connecting pipe, and the first water inlet connecting pipe penetrates the bottom end of the shell.

[0009] Further, the driving assembly comprises a circular shell body fixedly arranged at the center of the top end of the inner part of the shell, the circular shell body is internally provided with a rotating pipe, the bottom end of the rotating pipe is in rotary connection with the bottom end of the circular shell body through a sealing bearing, the top end of the rotating pipe extends out of the top end of the shell and is in rotary connection with the shell through a sealing bearing, and the top end of the rotating pipe is fixedly arranged at the bottom end of the outer water inlet pipe.

[0010] The outer end of the rotating pipe is fixedly provided with a plurality of blades, and the blades are arranged in the inner part of the circular shell body, the water outlet pipe of the water pump is fixedly provided with a water outlet connecting pipe, the water outlet connecting pipe is fixedly arranged at one side of the front end of the circular shell body and is in communication with the inner part of the circular shell body, and the water outlet connecting pipe faces the blades.

[0011] The outer end of the circular shell body is fixedly provided with a drain pipe for draining water, and the drain pipe penetrates the other side of the shell and extends out of the outer part of the shell.

[0012] Further, the bottom end of the rotating pipe is fixedly provided with a connecting pipe, the connecting pipe penetrates the bottom end of the circular shell body, the connecting pipe is connected with the water inlet pipe of the water pump through a second water inlet connecting pipe, and the connecting pipe and the second water inlet connecting pipe are in rotary connection through a sealing bearing, 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 communicated.

[0013] The water inlet pipe, the second water inlet connecting pipe and the first water inlet connecting pipe of the water pump are connected through a three-way joint.

[0014] Further, the end of the inner water inlet pipe away from the outer water inlet pipe is fixedly provided with a filter screen, the outer side of the end of the inner water inlet pipe close to the outer water inlet pipe is fixedly provided with a limiting ring, and a first spring is fixedly arranged between the limiting ring and the inner wall of the end of the outer water inlet pipe close to the inner water inlet pipe, and the first spring is arranged outside the inner water inlet pipe.

[0015] A sealing ring for sealing the gap between the inner water inlet pipe and the outer water inlet pipe is arranged between the inner water inlet pipe and the outer water inlet pipe.

[0016] Further, the outer end of the fixing ring is provided with a plurality of protrusions and a plurality of grooves, and the protrusions and the grooves are alternately distributed.

[0017] Further, the automatic speed regulating assembly comprises a fixed pipe fixed to the rear side of the inside of the shell, a first inlet pipe in communication with the bottom end of the fixed pipe extends out of the bottom end of the shell, a second inlet pipe in communication with the bottom end of the first inlet pipe, and a plurality of second filter holes in communication with the inner cavity of the second inlet pipe are arranged on the outer end of the second inlet pipe, the first inlet pipe and the second inlet pipe are arranged on the rear side of the hollow plate, and a floating ball is arranged in the inside of the shell.

[0018] Further, the inside of the fixed pipe is provided with a movable plate arranged on the top of the floating ball, the top end of the movable plate is provided with a movable rod, one end of the movable rod is fixedly connected with the top end of the movable plate, and the other end of the movable rod penetrates through the top end of the fixed pipe, the top end of the shell, and extends to the rear side of the shell by bypassing the top end of the shell.

[0019] The other end of the movable rod is fixedly provided with a rack, and the rack is engaged with a gear on one side.

[0020] The rear side of the shell is embedded with a control box for controlling the water pump, the rear end of the control box is provided with a speed regulating knob for adjusting the rotating speed of the water pump, and the speed regulating knob is arranged on the rear side of the shell, and the gear is fixedly arranged at the rear end of the speed regulating knob.

[0021] The outside of the movable rod is provided with a second spring fixedly connected between the top end of the movable plate and the top end of the inside of the fixed pipe.

[0022] Further, the rear end of the control box is fixedly provided with a protective shell arranged on the outside of the speed regulating knob, the rack and the gear for protecting the speed regulating knob, the rack and the gear, the rear end of the protective shell is hingedly connected with a sealing door.

[0023] The movable rod penetrates through the top of the protective shell and is movably connected with the protective shell, and sealing rings are arranged between the outer end of the movable plate and the inner wall of the fixed pipe, between the movable rod and the top end of the fixed pipe, between the movable rod and the top end of the shell, and between the movable rod and the top end of the protective shell.

[0024] Further, three groups of fixing assemblies for fixing the shell in the foundation pit in the high water level area are fixedly arranged on the outside of the bottom end of the shell.

[0025] Each group of fixing assemblies comprises a plug rod fixed to the bottom end of the shell, the plug rod is inserted into the foundation pit in the high water level area, and a limiting plate is fixedly arranged on the outer end of the plug rod.

[0026] The embodiment of the application has the following advantages:

[0027] 1. The hollow plate, the inner water inlet pipe and the outer water inlet pipe absorb water in the foundation pit by the water pump, and the driving assembly is driven, the outer water inlet pipe rotates to drive the inner water inlet pipe to rotate around the machine shell, and at the same time the inner water inlet pipe is telescopic, so as to change the position of the water inlet of the inner water inlet pipe, avoid the inner water inlet pipe from being in one position for a long time to cause a large amount of impurities in the water to gather at the inner water inlet pipe, and ensure the drainage efficiency;

[0028] 2. When the water level in the foundation pit is high, the floating ball rises to drive the movable plate, the movable rod and the rack to move upward, the rack drives the gear to rotate, the gear drives the speed knob to rotate, so as to increase the rotating speed of the water pump, improve the drainage efficiency, when the water level in the foundation pit is low, the speed knob rotates back to reduce the rotating speed of the water pump, the present application can automatically adjust the rotating speed of the water pump according to the water level, so as to adapt to the drainage work of different water levels in the foundation pit in high water level area. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0030] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the limiting conditions of the implementation of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0031] Figure 1 The overall structure diagram provided by the present application is provided;

[0032] Figure 2 The overall bottom view provided by the present application is provided;

[0033] Figure 3 The overall rear view provided by the present application is provided;

[0034] Figure 4 The overall top view provided by the present application is provided;

[0035] Figure 5 The sectional view provided by the present application is provided;

[0036] Figure 6 The front sectional view provided by the present application is provided;

[0037] Figure 7Provided by the present application Figure 6 Enlarged view of A in the middle

[0038] Figure 8 Provided by the present application

[0039] Figure 9 Provided by the present application

[0040] Figure 10 Provided by the present application Figure 9 Front view

[0041] Figure 11 Provided by the present application Figure 9 Rear view

[0042] Figure 12 Provided by the present application Figure 11 Structure diagram of the middle without protective shell and sealing door

[0043] In the figure: 1 machine shell, 2 water pump, 3 connecting plate, 4 hollow plate, 5 first water inlet connecting pipe, 6 second water inlet assembly, 7 automatic speed regulating assembly, 8 fixing assembly, 9 control box, 10 speed regulating knob

[0044] 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 limiting ring, 610 first spring, 611 fixing ring, 612 filter screen, 613 drain pipe

[0045] 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 sealing door

[0046] 81 insertion rod, 82 limiting plate DETAILED DESCRIPTION

[0047] The embodiments of the present application will be described in detail by the following specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art from the contents disclosed in the specification. Obviously, the described embodiments are part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0048] Example 1

[0049] As Figures 1-6The present invention provides an automatic speed-regulating drainage device for foundation pits in high water level areas, including a housing 1. Three sets of fixing components 8 are fixedly provided on the outer side of the bottom end of the housing 1 to fix the housing 1 in the foundation pit in the high water level area. Each set of fixing components 8 includes a plug rod 81. The plug rod 81 is fixed to the bottom end of the housing 1 and inserted into the foundation pit in the high water level area. A limiting plate 82 is fixedly provided on the outer end of the plug rod 81.

[0050] A water pump 2 is fixedly installed at the bottom of the casing 1. A first water inlet assembly is fixedly installed at the bottom of the casing 1. The first water inlet assembly includes a hollow plate 4 fixedly installed at the bottom of the casing 1 via a connecting plate 3. The bottom of the hollow plate 4 has 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 connected to the outside of the hollow plate 4 via a first water inlet connecting pipe 5, and the first water inlet connecting pipe 5 penetrates the bottom of the casing 1.

[0051] First, insert the rod 81 at the bottom of the casing 1 into the bottom of the pit in the high water level area until the limiting plate 82 is at the bottom of the pit, to prevent the hollow plate 4 from being blocked by excessive insertion into the pit and causing it to come into contact with the bottom of the pit.

[0052] Then, water in the pit is drawn into the water pump 2 through the hollow plate 4 and the first water inlet pipe 5. The first filter screen on the hollow plate 4 can filter impurities in the water.

[0053] To prevent impurities from clogging the first filter screen of hollow plate 4 and affecting drainage efficiency, such as Figures 1-6 As shown, a second water inlet assembly 6 is also provided on the top of the housing 1. The second water inlet assembly 6 includes an outer water inlet pipe 61 located on the top of the housing 1. One end of the outer water inlet pipe 61 is provided with an inner water inlet pipe 62. The end of the inner water inlet pipe 62 near the outer water inlet pipe 61 extends into the interior of the outer water inlet pipe 61 and is slidably connected to the outer water inlet pipe 61. The inner water inlet pipe 62 is located on one side of the housing 1. A filter screen 612 is fixedly provided at the end of the inner water inlet pipe 62 away from the outer water inlet pipe 61 to filter impurities in the water.

[0054] The top of the inner part of the housing 1 is provided with a drive assembly for driving the rotation of the external water inlet pipe 61, and the drive assembly is located on the top of the water pump 2. Specifically, as shown in the figure... Figures 5-7 As shown, the drive assembly includes a circular housing 63 fixedly disposed at the center of the top of the inner casing 1. A rotating tube 64 is provided inside the circular housing 63. The bottom end of the rotating tube 64 is rotatably connected to the bottom end of the circular housing 63 through a sealed bearing. The top end of the rotating tube 64 extends out of the top of the casing 1 and is rotatably connected to the casing 1 through a sealed bearing. The top end of the rotating tube 64 is fixed to the bottom end of the outer water inlet pipe 61.

[0055] The bottom end of the rotating pipe 64 is fixedly provided with a connecting pipe 66, which penetrates the bottom end of the circular shell 63. The connecting pipe 66 is connected to the water inlet pipe of the water pump 2 through the second water inlet connecting pipe 65, and the connecting pipe 66 and the second water inlet connecting pipe 65 are rotatably connected through a sealed bearing. The second water inlet connecting pipe 65, the connecting pipe 66, the rotating pipe 64, the outer water inlet pipe 61 and the inner water inlet pipe 62 are connected in sequence. 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 tee joint.

[0056] Multiple blades 67 are fixedly provided on the outer end of the rotating pipe 64, and the blades 67 are located inside the circular shell 63. A water outlet connecting pipe 68 is fixedly provided on the 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 communicates with the inside of the circular shell 63. The water outlet connecting pipe 68 faces the blades 67. A drain pipe 613 for drainage is fixedly provided on the outer end of the circular shell 63. The drain pipe 613 passes through the other side of the machine casing 1 and extends out of the outside of the machine casing 1. The external pipe of the drain pipe 613 introduces the water of the drain pipe 613 into the pit.

[0057] During operation, water in the pit is drawn into the water pump 2 through the inner water inlet pipe 62, the outer water inlet pipe 61, the turn pipe 64, the connecting pipe 66, and the second water inlet connecting pipe 65. Then, the water drawn into the water pump 2 is discharged out of the pit through the water outlet connecting pipe 68, the circular shell 63, and the drain pipe 613.

[0058] At the same time, the water sprayed from the outlet pipe 68 impacts the blades 67, driving the blades 67 to rotate, which in turn drives the rotating pipe 64 to rotate. The rotation of the rotating pipe 64 drives the connecting pipe 66 and the outer water inlet pipe 61 to rotate. The rotation of the outer water inlet pipe 61 drives the inner water inlet pipe 62 to rotate around the casing 1, thereby changing the position of the water inlet of the inner water inlet pipe 62. This prevents the inner water inlet pipe 62 from being in one position for a long time, which would cause a large amount of impurities in the water to accumulate at the inner water inlet pipe 62, thus ensuring drainage efficiency.

[0059] And, as Figure 7 As shown, a limiting ring 69 is fixedly provided on the outer side of the inner water inlet pipe 62 near the outer water inlet pipe 61, and a first spring 610 is fixedly provided between the limiting ring 69 and the inner wall of the outer water inlet pipe 61 near the inner water inlet pipe 62. The first spring 610 is provided on the outer side of the inner water inlet pipe 62 to facilitate the repositioning of the inner water inlet pipe 62. A sealing ring is provided between the inner water inlet pipe 62 and the outer water inlet pipe 61 to seal the gap between them.

[0060] A fixing ring 611 for driving the extension and retraction of the inner water inlet pipe 62 is fixedly provided at the bottom of the outer end of the housing 1. The inner water inlet pipe 62 is located outside the fixing ring 611. The outer end of the fixing ring 611 is provided with multiple protrusions and multiple grooves, and the protrusions and grooves are distributed alternately.

[0061] 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 limiting ring 69 to move outward and 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 limiting ring 69 reset under the elastic force of the first spring 610, thereby realizing the extension and retraction while the inner water inlet pipe 62 rotates, further changing the position of the water inlet of the inner water inlet pipe 62, avoiding 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 accumulate at the inner water inlet pipe 62, and ensuring drainage efficiency.

[0062] Example 2

[0063] like Figures 9-12 As shown, a control box 9 for controlling the water pump 2 is embedded on the rear side of the housing 1. A speed adjustment knob 10 for adjusting the speed of the water pump 2 is provided at the rear end of the control box 9. The speed adjustment knob 10 is located on the rear side of the housing 1. An automatic speed adjustment component 7 for adjusting the speed of the water pump 2 according to the water level in the pit is provided on the rear side of the housing 1.

[0064] Specifically, the automatic speed control component 7 includes a fixed tube 71 fixedly disposed inside the rear side of the housing 1. The bottom end of the fixed tube 71 is fixedly connected to a first inlet tube 73, which extends out of the bottom end of the housing 1. The bottom end of the first inlet tube 73 is fixedly connected to a second inlet tube 74, and the outer end of the second inlet tube 74 is provided with a plurality of second filter holes communicating with its inner cavity. The first inlet tube 73 and the second inlet tube 74 are both disposed behind the hollow plate 4. A float ball 72 is placed inside the housing 1.

[0065] The fixed tube 71 is provided with a movable plate 78 inside, and the movable plate 78 is located on the top of the float 72. The top of the movable plate 78 is provided with a movable rod 75. One end of the movable rod 75 is fixedly connected to the top of the movable plate 78, and the other end of the movable rod 75 passes through the top of the fixed tube 71 and the top of the housing 1, and extends around the top of the housing 1 to the rear side of the housing 1. The other end of the movable rod 75 is fixedly provided with a rack 76, and a gear 77 is meshed on one side of the rack 76. The gear 77 is fixedly located at the rear end of the speed adjustment knob 10.

[0066] The movable rod 75 is provided with a second spring 79 on its outer side. The second spring 79 is fixedly connected between the top of the movable plate 78 and the top of the inside of the fixed tube 71, so as to facilitate the reset of the movable plate 78.

[0067] After the casing 1 is fixed in the pit, the water in the pit enters the fixed pipe 71 through the second inlet pipe 74 and the first inlet pipe 73, causing the float 72 to rise. The water level from the float 72 to the point where it just contacts the movable plate 78 is the low water level, and the water level above the movable plate 78 is the high water level.

[0068] When the water level is low, personnel can control the water pump 2 to start and carry out drainage work through the additionally arranged control switch, such as a remote control switch, at this time, the rotating speed of the water pump 2 is fixed;

[0069] When the water level is high, the floating ball 72 rises to make the movable plate 78 move upward, compress the second spring 79, drive the movable rod 75 and the rack 76 to move upward, drive the gear 77 to rotate, the gear 77 drives the speed regulating knob 10 to rotate, thereby increasing the rotating speed of the water pump 2 and improving the drainage efficiency;

[0070] When the water level in the foundation pit is low, the movable plate 78, the movable rod 75, the rack 76 and the gear 77 reset under the elastic force of the second spring 79, so that the speed regulating knob 10 rotates back and reduces the rotating speed of the water pump 2.

[0071] The application can automatically adjust the rotating speed of the water pump 2 according to the water level to adapt to the drainage work of different water levels in the foundation pit in high water level areas.

[0072] In order to protect the rack 76, the gear 77 and the speed regulating knob 10, a protective shell 710 is fixed at the rear end of the control box 9, the protective shell 710 is arranged outside the speed regulating knob 10, the rack 76 and the gear 77 to protect the speed regulating knob 10, the rack 76 and the gear 77, and a sealing door 711 is hinged to the rear end of the protective shell 710.

[0073] The movable rod 75 penetrates through the top of the protective shell 710 and is movably connected with the protective shell 710, 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 fixed pipe 71, between the movable rod 75 and the top end of the machine shell 1, and between the movable rod 75 and the top end of the protective shell 710 to avoid water in the foundation pit from entering the inside of the application.

[0074] Although the application has been described in detail in the foregoing description with general principles and specific embodiments, some modifications or improvements can be made on the basis of the application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the application are within the scope of the application claimed.

Claims

1. An automatic speed-adjusting drainage device for a foundation pit in a high-water area, comprising a casing (1), a water pump (2) being fixedly arranged at the bottom of the casing (1) inside, characterized in that: The bottom end of the shell (1) is fixedly provided with a first water inlet assembly, which comprises a hollow plate (4) fixedly provided at the bottom end of the shell (1) through a connecting plate (3), and a plurality of first filter holes are formed in the bottom end of the hollow plate (4) and communicated with the inner cavity of the hollow plate (4); The top of the shell (1) is provided with a second water inlet assembly (6), which comprises an outer water inlet pipe (61) provided 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 of the inner water inlet pipe (62) close to the outer water inlet pipe (61) extends into the inner part of 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 provided at one side of the shell (1); A driving assembly for driving the outer water inlet pipe (61) to rotate is arranged at the top of the water pump (2), and a fixing ring (611) for driving the inner water inlet pipe (62) to stretch and retract is fixedly arranged at the outer end of the bottom of the shell (1), and the inner water inlet pipe (62) is arranged outside the fixing ring (611); An automatic speed regulating assembly (7) is arranged at the rear side of the shell (1); The water inlet pipe of the water pump (2) is fixedly communicated with the outside of the hollow plate (4) through a first water inlet connecting pipe (5), and the first water inlet connecting pipe (5) penetrates the bottom end of the shell (1); The driving assembly comprises a circular shell (63) fixedly arranged at the center of the top inner part of the shell (1), a rotating pipe (64) arranged in the circular shell (63), the bottom end of the rotating pipe (64) is rotatably connected with the bottom end of the circular shell (63) through a sealing bearing, the top end of the rotating pipe (64) extends out of the top end of the shell (1) and is rotatably connected with the shell (1) through a sealing bearing, and the top end of the rotating pipe (64) is fixedly arranged at the bottom end of the outer water inlet pipe (61); A plurality of blades (67) are fixedly arranged at the outer end of the rotating pipe (64) and arranged in the circular shell (63), a water outlet connecting pipe (68) is fixedly arranged on the water outlet pipe of the water pump (2), the water outlet connecting pipe (68) is fixedly arranged at one side of the front end of the circular shell (63) and communicated with the inside of the circular shell (63), and the water outlet connecting pipe (68) faces the blades (67); A drain pipe (613) is fixedly arranged at the outer end of the circular shell (63) and penetrates the other side of the shell (1) and extends out of the shell (1); A connecting pipe (66) is fixedly arranged at the bottom end of the rotating pipe (64) and penetrates 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 a second water inlet connecting pipe (65), and the connecting pipe (66) and the second water inlet connecting pipe (65) are rotatably connected through a sealing bearing, and the second water inlet connecting 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 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.

2. The automatic speed-adjustable drainage device for a foundation pit in a high-water-level area according to claim 1, characterized in that: The inner water inlet pipe (62) is fixedly provided with a filter screen (612) at one end away from the outer water inlet pipe (61), a limiting ring (69) is fixedly arranged outside one end of the inner water inlet pipe (62) close to the outer water inlet pipe (61), and a first spring (610) is fixedly arranged between the limiting ring (69) and the inner wall of one end of the outer water inlet pipe (61) close to the inner water inlet pipe (62), and the first spring (610) is arranged outside the inner water inlet pipe (62). A sealing ring is arranged between the inner water inlet pipe (62) and the outer water inlet pipe (61) to seal the gap therebetween.

3. The automatic speed-adjustable drainage device for the foundation pit in high water level area according to claim 1, characterized in that: The outer end of the fixing ring (611) is provided with a plurality of protrusions and a plurality of grooves, and the protrusions and the grooves are arranged alternately.

4. The automatic speed-adjustable drainage device for foundation pit in high water level area according to claim 1, characterized in that: The automatic speed regulating assembly (7) comprises a fixed pipe (71) fixedly arranged at the rear side of the inner part of the casing (1), a first inlet pipe (73) fixedly and communicatively connected to the bottom end of the fixed pipe (71), the first inlet pipe (73) extending out of the bottom end of the casing (1), a second inlet pipe (74) fixedly and communicatively connected to the bottom end of the first inlet pipe (73), a plurality of second filter holes being formed in the outer end of the second inlet pipe (74) and being in communication with the inner cavity of the second inlet pipe (74), the first inlet pipe (73) and the second inlet pipe (74) being arranged at the rear side of the hollow plate (4), and a floating ball (72) being arranged in the inner part of the casing (1).

5. The automatic speed-adjustable drainage device for the foundation pit in high water level area according to claim 4, characterized in that: The inner part of the fixed pipe (71) is provided with a movable plate (78), and 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 a movable rod (75), one end of the movable rod (75) is fixedly connected to 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), the top end of the casing (1), and extends to the rear side of the casing (1) by bypassing the top end of the casing (1); The other end of the movable rod (75) is fixedly provided with a rack (76), and one side of the rack (76) is engaged with a gear (77); The rear side of the casing (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 adjusting the rotating speed of the water pump (2), the speed regulating knob (10) is arranged at the rear side of the casing (1), and the gear (77) is fixedly arranged at the rear end of the speed regulating knob (10); The outer side of the movable rod (75) is provided with a second spring (79), and the second spring (79) is fixedly connected between the top end of the movable plate (78) and the inner top end of the fixed pipe (71).

6. The automatic speed-adjustable drainage device for the foundation pit in high water level area according to claim 5, characterized in that: The rear end of the control box (9) is fixedly provided with a protective shell (710), the protective shell (710) is arranged outside the speed regulating knob (10), the rack (76), and the gear (77) for protecting the speed regulating knob (10), the rack (76), and the gear (77), and the rear end of the protective shell (710) is hingedly connected with a sealing door (711); The movable rod (75) penetrates through the top part 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 fixed pipe (71), between the movable rod (75) and the top end of the casing (1), and between the movable rod (75) and the top end of the protective shell (710).

7. The automatic speed-adjustable drainage device for foundation pit in high water level area according to claim 1, characterized in that: The machine shell (1) bottom end outside is fixed with three groups of fixed assembly (8) which fix the machine shell (1) in the high water level area foundation pit; Each group of fixed assembly (8) includes a plug-in rod (81), the plug-in rod (81) is fixed to the machine shell (1) bottom end, the plug-in rod (81) is inserted in the high water level area foundation pit, the plug-in rod (81) outside end is fixed with a limit board (82).

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