A deep foundation pit silt pumping device

Abstract

The present invention relates to a deep foundation pit sludge pumping device, which comprises an upper housing. An outer sleeve is sleeved on the outer edge surface of the upper housing. A through hole is formed in the lower end surface of the upper housing. An annular plate is fixed above the through hole. A plurality of first water inlets are formed in the outer edge surface of the annular plate. A vertical pipe is fixed in the middle of the annular plate. A second water inlet is formed in the upper side of the outer edge surface of the vertical pipe. An annular first water baffle and a second water baffle are respectively arranged on the outer edge surface of the annular plate and the upper side of the outer edge surface of the vertical pipe. When the first water baffle and the second water baffle move upward, the first water inlet is opened and the second water inlet is closed. Water flows into the upper housing through the first water inlet to drive the upper housing to rotate around the axis. An annular buoyancy block capable of moving up and down is sleeved outside the outer sleeve. A lower housing is arranged below the upper housing. The present invention can avoid pumping a large amount of sludge at the bottom of the foundation pit when pumping from bottom to top by the fact that the buoyancy block descends with the liquid level height, and can pump out the accumulated water inside the sludge after the accumulated water liquid level drops.

Description

Technical Field

[0001] The present invention relates to the field of building construction, and in particular to a deep foundation pit sludge pumping device. Background Art

[0002] The construction operation of deep foundation pits is affected by many factors such as labor, geology, and weather, and there are too many emergencies. For example, when the excavation depth is relatively large, groundwater seepage is likely to occur. Therefore, after the deep foundation pit is excavated, drainage ditches and catch wells need to be set up in advance to facilitate the subsequent suction and discharge of the water collected in the foundation pit. However, there are still the following problems in the current construction stage: 1. For deep foundation pits where drainage ditches are not set up in time or foundation pits facing extreme rainfall weather, rainwater will still accumulate. Since there are a large amount of sludge and impurities at the bottom of the foundation pit, the water accumulated in the foundation pit is turbid. When using a traditional water pump to pump water, it is difficult to determine the deepest part of the foundation pit. As the liquid level drops, the pumping position needs to be changed multiple times, and it is difficult to quickly pump dry the water accumulated in the foundation pit; 2. At the same time, the sludge is extremely likely to cause blockage of the pumping pipeline, and even pump out the sludge together, resulting in soil loss and causing the depth of the foundation pit to deviate from the designed depth; 3. The traditional water suction pipe can only extend to the upper side of the foundation pit soil layer. When pumping to the bottom of the accumulated water, when the pipe orifice of the water suction pipe is exposed to the air, air and the accumulated water are sucked into the water suction pipe together, and the negative pressure decreases; 4. The sludge at the bottom of the foundation pit has a large water content, and it is difficult to quickly carry out subsequent construction. Re-excavating drainage ditches or catch wells is time-consuming and laborious, resulting in project delays.

[0003] In the prior art, a bridge and culvert foundation pit dewatering and drainage device disclosed in the patent publication No. CN214783262U makes the water suction port drop with the liquid level through a buoyancy block, and a conical filter screen is arranged at the bottom to filter impurities while using the water flow to drive the impeller to rotate to make the filter cover rotate to prevent blockage; although this scheme can improve the filtering efficiency of the filter screen and achieve a self-cleaning effect, as the water level drops, the sludge content in the accumulated water is greater, and the filter holes are more likely to be blocked. Moreover, once the lower end of the device touches the sludge, the resistance will increase, and it is difficult for the impeller to rotate normally for the self-cleaning function of the filter screen, and even cause the filter holes to be completely trapped in the sludge and blocked, unable to continue pumping water; at the same time, this scheme is limited by the structure, resulting in a limited pumping height. Once the liquid level is lower than the uppermost filter hole, the negative pressure of the water suction pipe will decrease, and it is difficult to completely pump dry the accumulated water.

[0004] A foundation pit water pumping and filtering device disclosed in the patent publication No. CN114225552B solves the problem of the decrease in negative pressure caused by pumping air by setting a structure at the lower end of the water suction pipe that can autonomously drop with the liquid level height to narrow the water suction port, ensuring that the water suction port is always below the liquid level during the pumping process. However, this scheme can only pump water above the sludge. Without setting up drainage ditches and catch basins in advance, it cannot solve the problem of the large water content of the sludge and still requires changing the pumping position multiple times to pump dry the water accumulated in the foundation pit. Summary of the Invention

[0005] In view of the above situation, to overcome the defects of the prior art, the present invention adopts a deep foundation pit sludge pumping device, which solves the problems of incomplete pumping and high water content of the sludge after pumping in the prior art.

[0006] The technical solution it adopts is as follows: A deep foundation pit sludge pumping device includes an upper housing, which is a bowl-shaped housing with an open upper end. An outer sleeve is sleeved on the outer edge surface of the upper housing, and the outer sleeve is rotationally connected to the outer edge surface of the upper housing through a bearing. A through hole is opened on the lower end surface of the upper housing, and an annular plate is coaxially fixed above the through hole. A plurality of first water inlets evenly distributed along the circumference are opened on the outer edge surface of the annular plate. A vertical pipe is coaxially fixed in the middle of the annular plate, and the upper end of the vertical pipe extends out of the upper end surface of the annular plate. The upper end opening of the vertical pipe is blocked, and a second water inlet is opened on the upper side of the outer edge surface. An annular first water baffle and a second water baffle are respectively arranged on the outer edge surface of the annular plate and the upper side of the outer edge surface of the vertical pipe. The first water baffle and the second water baffle move up and down synchronously. When the first water baffle and the second water baffle move upward, the first water inlets are opened and the second water inlets are closed. When the first water baffle and the second water baffle move downward, the first water inlets are closed and the second water inlets are opened. Water flows into the upper housing through the first water inlets to drive the upper housing to rotate around the axis; An annular buoyancy block that can move up and down is sleeved outside the outer sleeve, and the buoyancy block can drive the first water baffle and the second water baffle to move up and down synchronously; A cylindrical lower housing is arranged below the upper housing. The whole lower housing is made of a water-permeable material, and the lower end surface of the lower housing is a conical surface with the tip facing downward.

[0007] Preferably, a first support plate is fixed on the upper end surface of the annular plate. The vertical pipe passes through the first support plate and is fixedly connected to the first support plate. A second support plate is fixed between the first water baffle and the second water baffle. A tension spring is fixed between the first support plate and the second support plate, so that the first water baffle and the second water baffle are always located at the lowermost end. Vertical through grooves are respectively opened on the left and right sides of the outer sleeve. A cross bar is respectively fixed on the left and right sides of the inner edge surface of the buoyancy block. The two cross bars are respectively placed in the corresponding through grooves and can slide up and down along the through grooves. The inner end of the cross bar is fixedly connected to the second support plate.

[0008] Preferably, a plurality of flow guiding plates are fixed on the inner edge surface of the upper housing. All the flow guiding plates are evenly distributed along the circumference and are placed at the same inclination angle in the circumferential direction.

[0009] Preferably, a plurality of first water permeable holes are evenly formed in the side surface of the lower housing. A filter cylinder is coaxially arranged inside the lower housing. The filter cylinder is made of a water permeable material, and the outer edge surface thereof fits with the inner edge surface of the lower housing and can rotate freely around the axis. Second water permeable holes corresponding to the first water permeable holes one by one are formed in the side surface of the filter cylinder. An impeller is fixed to the lower side of the filter cylinder. The middle part of the impeller is rotatably connected to the vertical pipe through a bearing. A horizontal sink is formed in one end surface of the impeller in contact with the vertical pipe. A limiting block is fixed on the outer edge surface of the vertical pipe in the sink. When the impeller rotates relative to the vertical pipe, the limiting block can contact the side wall of the sink to block the rotation of the impeller; A torsion spring is arranged between the impeller and the vertical pipe. The torsion spring makes the limiting block always contact one side wall of the sink, and all the second water permeable holes are not communicated with the first water permeable holes.

[0010] Preferably, a vertical brush plate is fixed to each of the left and right sides of the lower end surface of the outer sleeve pipe and located on the lower housing. A brush is arranged on one side of the brush plate close to the lower housing, and the brush contacts the outer edge surface of the lower housing.

[0011] Preferably, a plurality of rib plates evenly distributed along the circumference are fixed to the outer edge surface of the buoyancy block. The rib plates and the buoyancy block are both made of foam material.

[0012] Preferably, a thread is arranged on the conical surface of the lower end surface of the lower housing, and a plurality of vertical plates evenly distributed along the circumference of the axis of the lower housing are arranged on the outer edge surface of the lower housing.

[0013] Preferably, the diameter of the through hole is much larger than the diameter of the vertical pipe, and the opening area of all the first water inlets is much larger than the opening area of all the second water inlets.

[0014] The present invention has the following advantages compared with the prior art:

[0015] 1. By installing at the pumping port position of the pumping pipeline, the pumping port can drop with the liquid level height under the action of the buoyancy block, avoiding pumping a large amount of silt at the bottom of the foundation pit from bottom to top, blocking the pipeline and causing soil loss in the foundation pit at the same time;

[0016] 2. When the guide plate is impacted by the water flow, it drives the upper housing to rotate around the axis, and cooperates with the brush plate. The blockage outside the vertical rod is cleaned by the centrifugal force and the blocking force of the brush plate, avoiding blockage of the lower housing; The rotation of the upper housing drives the lower housing to rotate synchronously. When the conical surface at the lower end of the lower housing contacts the silt, it can drill into the silt downward under the action of its own gravity and the thread. Even if the height of the bottom of the foundation pit is uneven, the lower end of the vertical pipe can be made as low as possible below the lowest point of the foundation pit, so that the accumulated water above the silt can be completely pumped dry;

[0017] 3. The buoyancy block drives the first water baffle and the second water baffle to move up and down synchronously with the liquid level height. When the liquid level is lower than the height of the buoyancy block, the first water baffle blocks all the first water inlets, and at the same time, the second water baffle releases the blockage of all the second water inlets. The water flow can only be sucked upward through the lower end of the vertical pipe. Since the water flow passing through the impeller becomes larger, the rotation of the impeller connects all the first water permeable holes and the second water permeable holes, greatly improving the water permeability efficiency, avoiding the bottom mud of the foundation pit from blocking the lower shell, and at the same time changing the water flow direction through the impeller to improve the pumping efficiency;

[0018] 4. The lower shell is made of water-permeable material, which is convenient for collecting and sucking the water contained in the mud after the water accumulation in the foundation pit is sucked out, greatly improving the water loss speed of the bottom mud of the foundation pit, so as to quickly resume construction and shorten the construction period;

[0019] 5. By setting the diameter of the vertical pipe to be much smaller than the through hole, even if the amount of water seeping into the lower shell is small, it can still be sucked upward into the vertical pipe. When the liquid level is lower than the lower end opening of the vertical pipe, since the upper end of the lower shell is always above the mud, air can enter the vertical pipe through the lower shell. After the lower shell is in negative pressure, the mud is blocked and sucked, resulting in too large negative pressure in the pipeline and damaging the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the front view of the present invention.

[0021] Figure 2 This is the front cross-sectional view of the present invention.

[0022] Figure 3 This is the top cross-sectional view of the impeller part of the present invention.

[0023] Figure 4 This is the front cross-sectional view of the buoyancy block of the present invention floating on the water surface.

[0024] Figure 5 This is the three-dimensional part drawing of the buoyancy block, rib plate, second support plate, first water baffle and cross bar of the present invention.

[0025] Figure 6 This is the three-dimensional part drawing of the upper shell, annular plate, first support plate and guide plate of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] The following further elaborates in detail the specific embodiments of the present invention with reference to the accompanying drawings.

[0027] By Figures 1 to 6Provided, the present invention includes an upper housing 1, the upper housing 1 is a bowl-shaped housing with an open upper end, an outer sleeve 2 is sleeved on the outer edge surface of the upper housing 1, and the outer sleeve 2 is rotationally connected to the outer edge surface of the upper housing 1 through a bearing. A through hole 3 is provided on the lower end surface of the upper housing 1, an annular plate 4 is coaxially fixed above the through hole 3, a plurality of first water inlets 5 evenly distributed along the circumference are provided on the outer edge surface of the annular plate 4, a vertical pipe 6 is coaxially fixed in the middle of the annular plate 4, the upper end of the vertical pipe 6 extends out of the upper end surface of the annular plate 4, the upper end opening of the vertical pipe 6 is blocked, and a second water inlet 7 is provided on the upper side of the outer edge surface of the vertical pipe 6. An annular first water baffle 8 and a second water baffle 9 are respectively provided on the outer edge surface of the annular plate 4 and the upper side of the outer edge surface of the vertical pipe 6, and the first water baffle 8 and the second water baffle 9 move up and down synchronously. When the first water baffle 8 and the second water baffle 9 move upward, the first water inlet 5 is opened and the second water inlet 7 is closed. When the first water baffle 8 and the second water baffle 9 move downward, the first water inlet 5 is closed and the second water inlet 7 is opened. Water flows into the upper housing 1 through the first water inlet 5 to drive the upper housing 1 to rotate self-axially; an annular buoyancy block 10 that can move up and down is sleeved outside the outer sleeve 2, and the buoyancy block 10 can drive the first water baffle 8 and the second water baffle 9 to move up and down synchronously; a cylindrical lower housing 11 is provided below the upper housing 1, the lower housing 11 is made of a water-permeable material as a whole, and the lower end surface of the lower housing 11 is a conical surface with the tip facing downward.

[0028] A first support plate 12 is fixed on the upper end surface of the annular plate 4, the vertical pipe 6 passes through the first support plate 12 and is fixedly connected to the first support plate 12. A second support plate 13 is fixed between the first water baffle 8 and the second water baffle 9. A tension spring is fixed between the first support plate 12 and the second support plate 13, and the tension spring makes the first water baffle 8 and the second water baffle 9 always located at the lowermost end. A vertical through groove 14 is respectively provided on the left and right sides of the outer sleeve 2, a cross bar 15 is respectively fixed on the left and right sides of the inner edge surface of the buoyancy block 10, the two cross bars 15 are respectively placed in the corresponding through grooves 14 and can slide up and down along the through grooves 14, and the inner ends of the cross bars 15 are fixedly connected to the second support plate 13.

[0029] A plurality of flow guide plates 16 are fixed on the inner edge surface of the upper housing 1, all the flow guide plates 16 are evenly distributed along the circumference and are placed at the same inclination angle in the circumferential direction, and the water flow passing through the flow guide plates 16 can apply a torque rotating along the axis to the upper housing 1.

[0030] A plurality of first water-permeable holes 17 are evenly formed in the side surface of the lower housing 11. A filter cylinder 18 is coaxially arranged inside the lower housing 11. The filter cylinder 18 is made of a water-permeable material, and the outer edge surface thereof is attached to the inner edge surface of the lower housing 11 and can rotate freely around the axis. Second water-permeable holes 19 corresponding to the first water-permeable holes 17 one by one are formed in the side surface of the filter cylinder 18. An impeller 20 is fixed to the lower side of the filter cylinder 18. The middle of the impeller 20 is rotatably connected to the vertical pipe 6 through a bearing. A horizontal sink 21 is formed in one end surface of the impeller 20 in contact with the vertical pipe 6. A limiting block 22 is fixed on the outer edge surface of the vertical pipe 6 in the sink 21. When the impeller 20 rotates relative to the vertical pipe 6, the limiting block 22 can contact the side wall of the sink 21 to block the rotation of the impeller 20; a torsion spring is arranged between the impeller 20 and the vertical pipe 6, and the torsion spring makes the limiting block 22 always contact one side wall of the sink 21, and all the second water-permeable holes 19 are not communicated with the first water-permeable holes 17. When water flows downward through the impeller 20, the impeller 20 can be driven to rotate until the limiting block 22 contacts the other side wall of the sink 21.

[0031] Vertical brush plates 23 are respectively fixed to the left and right sides of the lower end surface of the outer sleeve 2 located at the lower housing 11. A brush is arranged on one side of the brush plate 23 close to the lower housing 11, and the brush contacts the outer edge surface of the lower housing 11.

[0032] A plurality of rib plates 24 evenly distributed along the circumference are fixed to the outer edge surface of the buoyancy block 10. The rib plates 24 and the buoyancy block 10 are both made of foam material.

[0033] Threads are arranged on the conical surface of the lower end surface of the lower housing 11, and a plurality of vertical plates 25 evenly distributed along the circumference of the axis of the lower housing 11 are arranged on the outer edge surface of the lower housing 11.

[0034] The diameter of the through hole 3 is much larger than the diameter of the vertical pipe 6, and the opening area of all the first water inlets 5 is much larger than the opening area of all the second water inlets 7.

[0035] It is worth mentioning that in order to improve the anti-torsion ability of the outer sleeve 2, a corrugated pipe with a relatively large anti-torsion strength can be set as the pumping pipeline, or a telescopic rod can be fixed at the upper end of the foundation pit, and the telescopic rod is fixedly connected to the outer sleeve 2, which not only does not affect the up and down movement of the outer sleeve 2 along with the liquid level, but also can improve the anti-torsion ability of the outer sleeve 2.

[0036] When the present invention is in use, first, the outer sleeve 2 is connected to a water pump through a water suction pipe, and then the conical end of the lower housing 11 is placed downward in the accumulated water in the foundation pit. Under the buoyancy action of the buoyancy block 10, the outer sleeve 2 floats above the liquid level, as shown in the appendix Figure 4In the state shown, the upper housing 1 and the lower housing 11 are both located below the liquid level. Start the water pump. The water flows through the through hole 3 and enters the upper housing 1 and is pumped out of the foundation pit upward through the pipeline. The water flowing into the outer sleeve 2 through the second water inlet 7 is much less than the water flowing into the first water inlet 5. The impeller 20 is not sufficient to overcome the torsion of the torsion spring and rotate to the position where the first water permeable hole 17 communicates with the second water permeable hole 19. When the water flows into the upper housing 1 through the first water inlet 5, it is driven by the guiding action of the inclined deflector 16 to drive the upper housing 1 to rotate around the axis. Since the buoyancy block 10 generates a large resistance with the water surface through the rib plate 24, the outer sleeve 2 does not rotate with the upper housing 1, and a relative rotation occurs between the brush plate 23 and the lower housing 11. The bristles on the brush plate 23 can clean the blockages on the outer surface of the lower housing 11 to avoid blockages. As the liquid level gradually drops until the lower end surface of the lower housing 11 contacts the bottom of the foundation pit, since the lower housing 11 always rotates with the upper housing 1, the lower conical surface of the lower housing 11 can drill downward into the silt at the bottom of the foundation pit under the action of the thread until the vertical plate 25 on the outer edge surface of the lower housing 11 contacts the upper end surface of the silt and generates a large resistance, and the lower housing 11 stops rotating. At this time, as the liquid level continues to drop, the upper housing 1 and the outer sleeve 2 are no longer supported by the lower housing 11 and do not continue to drop, while the buoyancy block 10 drives the second support plate 13 to continue to drop through the cross bar 15 under the action of its own gravity and the tension spring until the first water baffle 8 and the second water baffle 9 drop to the lowest end, as shown in the appendix Figure 2 In the state shown, the first water baffle 8 blocks all the first water inlets 5, and at the same time, the second water baffle 9 releases the blockage of all the second water inlets 7. The water can only be sucked upward through the lower end of the vertical pipe 6. Since the water flow through the impeller 20 becomes larger, the impeller 20 rotates to connect all the first water permeable holes 17 with the second water permeable holes 19, accelerating the suction of the accumulated water above the silt. Since the lower half of the lower housing 11 is placed in the silt and the lower housing 11 is made of a water permeable material, after the accumulated water on the upper side of the silt is pumped dry by the vertical pipe 6, the vertical pipe 6 can continue to suck the accumulated water that seeps into the lower housing 11 from the inside of the silt. Since the diameter of the vertical pipe 6 is much smaller than that of the through hole 3, even if the amount of water seeping into the lower housing 11 is small, it can still be sucked upward into the vertical pipe 6. At this time, in order to save energy, the water pump can be used to pump water at intervals to avoid the motor idling when the seepage amount is small; in order to improve the pumping efficiency, multiple groups of this device can be set to pump water at different positions in the foundation pit at the same time.

[0037] In the present invention, as the buoyancy block 10 drops with the liquid level height, a large amount of silt at the bottom of the foundation pit is avoided being pumped away when pumping upward, and at the same time, the accumulated water inside the silt can be pumped out after the liquid level of the accumulated water drops, greatly improving the pumping efficiency of the foundation pit without frequent manual operation.

Claims

1. A deep foundation pit sludge pumping device, comprising an upper shell (1), characterized in that: The upper shell (1) is a bowl-shaped shell with an opening at the upper end. An outer sleeve (2) is sleeved on the outer edge surface of the upper shell (1). The outer sleeve (2) is rotatably connected to the outer edge surface of the upper shell (1) via a bearing. A through hole (3) is provided on the lower end surface of the upper shell (1). An annular plate (4) is coaxially fixed on the upper side of the through hole (3). The outer edge surface of the annular plate (4) is provided with a plurality of first water inlets (5) uniformly distributed along the circumference. A vertical pipe (6) is coaxially fixed in the middle of the annular plate (4). The upper end of the vertical pipe (6) extends out of the upper end surface of the annular plate (4). The upper end opening of the vertical pipe (6) is sealed and a second water inlet (7) is provided on the upper side of the outer edge surface. A first annular water baffle (8) and a second water baffle (9) are respectively provided on the outer edge surface of the annular plate (4) and the upper side of the outer edge surface of the vertical pipe (6). The first water baffle (8) and the second water baffle (9) move up and down synchronously. When the first water baffle (8) and the second water baffle (9) move up and down synchronously, the first water baffle (8) and the second water baffle (9) move up and down synchronously. When the two water baffles (9) move upward, the first water inlet (5) is opened and the second water inlet (7) is closed. When the first water baffle (8) and the second water baffle (9) move downward, the first water inlet (5) is closed and the second water inlet (7) is opened. Water flows through the first water inlet (5) into the upper shell (1) to drive the upper shell (1) to rotate around the axis. An annular buoyancy block (10) capable of moving up and down is mounted on the outer side of the outer sleeve (2). The buoyancy block (10) can drive the first water baffle (8) and the second water baffle (9) to move up and down synchronously. A cylindrical lower shell (11) is arranged on the lower side of the upper shell (1). The lower shell (11) is made of a water-permeable material as a whole and the lower end surface of the lower shell (11) is a conical surface with the tip facing downward. After the lower end surface of the lower shell (11) contacts the bottom of the foundation pit, the lower end conical surface of the lower shell (11) can drill downward into the mud at the bottom of the foundation pit. The side of the lower shell (11) is evenly provided with a plurality of first water permeable holes (17); a filter cartridge (18) is coaxially arranged on the inner side of the lower shell (11); the filter cartridge (18) is made of a water permeable material and its outer edge surface is in contact with the inner edge surface of the lower shell (11) and can rotate freely around the axis; the side of the filter cartridge (18) is provided with second water permeable holes (19) corresponding to the first water permeable holes (17); an impeller (20) is fixed to the lower side of the filter cartridge (18); the middle part of the impeller (20) is rotatably connected to the vertical pipe (6) via a bearing; the impeller (20) and the vertical pipe (6) are connected in a rotatable manner. A horizontal groove (21) is provided on one end face of the tube (6), and a limit block (22) is fixed on the outer edge face of the vertical tube (6) in the groove (21). When the impeller (20) rotates relative to the vertical tube (6), the limit block (22) can contact the side wall of the groove (21) to block the rotation of the impeller (20). A torsion spring is provided between the impeller (20) and the vertical tube (6). The torsion spring enables the limit block (22) to always contact one side wall of the groove (21), and all the second water-permeable holes (19) are disconnected from the first water-permeable holes (17).

2. A deep foundation pit sludge pumping device according to claim 1, characterized in that: A first support plate (12) is fixed on the upper end surface of the annular plate (4); the vertical pipe (6) penetrates the first support plate (12) and is fixedly connected to the first support plate (12); a second support plate (13) is fixed between the first water baffle plate (8) and the second water baffle plate (9); a tension spring is fixed between the first support plate (12) and the second support plate (13); the tension spring enables the first water baffle plate (8) and the second water baffle plate (9) to always be located at the bottom; a vertical through groove (14) is respectively formed on the left and right sides of the outer sleeve (2); a cross bar (15) is respectively fixed on the left and right sides of the inner edge surface of the buoyancy block (10); the two cross bars (15) are respectively placed in the through grooves (14) on the corresponding sides and can slide up and down along the through grooves (14); the inner ends of the cross bars (15) are fixedly connected to the second support plate (13).

3. A deep foundation pit sludge pumping device according to claim 1, characterized in that: A plurality of guide plates (16) are fixed to the inner edge surface of the upper shell (1), and all the guide plates (16) are evenly distributed along the circumference and are placed at the same inclined angle along the circumferential direction.

4. A deep foundation pit sludge pumping device according to claim 1, characterized in that: A vertical brush plate (23) is fixed to the lower end surface of the outer sleeve (2) located on the left and right sides of the lower shell (11), respectively. Bristles are provided on one side of the brush plate (23) close to the lower shell (11), and the bristles are in contact with the outer edge surface of the lower shell (11).

5. A deep foundation pit sludge pumping device according to claim 1, characterized in that: A plurality of ribs (24) evenly distributed along the circumference are fixed to the outer edge surface of the buoyancy block (10); the ribs (24) and the buoyancy block (10) are both made of foam material.

6. A deep foundation pit sludge pumping device according to claim 1, characterized in that: The conical surface of the lower end face of the lower shell (11) is provided with a thread, and the outer edge surface of the lower shell (11) is provided with a plurality of vertical plates (25) evenly distributed along the circumference of the axis of the lower shell (11).

7. A deep foundation pit sludge pumping device according to claim 1, characterized in that: The diameter of the through hole (3) is much larger than the diameter of the vertical pipe (6), and the opening area of ​​all the first water inlets (5) is much larger than the opening area of ​​all the second water inlets (7).

Images