Deep foundation pit sludge pumping device

Abstract

The invention relates to a deep foundation pit sludge pumping device which comprises an upper shell, the outer edge face of the upper shell is sleeved with an outer sleeve, a through hole is formed in the lower end face of the upper shell, an annular plate is fixed to the upper side of the through hole, a plurality of first water inlets are formed in the outer edge face of the annular plate, a vertical pipe is fixed to the middle of the annular plate, and a second water inlet is formed in the upper side of the outer edge face of the vertical pipe. A first annular water baffle and a second annular water baffle are arranged on the upper side of the outer edge face of the annular plate and the upper side of the outer edge face of the vertical pipe respectively, when the first water baffle and the second water baffle move upwards, the first water inlet is opened, the second water inlet is closed, and water flow enters the upper shell through the first water inlet to drive the upper shell to rotate around the axis. An annular buoyancy block capable of moving up and down sleeves the outer side of the outer sleeve, and a lower shell is arranged on the lower side of the upper shell; the buoyancy block descends along with the height of the liquid level, a large amount of sludge at the bottom of the foundation pit is prevented from being pumped away during pumping from bottom to top, and meanwhile accumulated water in the sludge can be pumped out after the accumulated water liquid level descends.

Description

Technical Field

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

[0002] The construction of deep foundation pits is affected by many factors such as manpower, geology, and weather, and is accompanied by too many unexpected situations. For example, when the excavation depth is large, groundwater seepage is likely to occur. Therefore, drainage ditches and water collection wells need to be set up in advance after the excavation of deep foundation pits to facilitate the subsequent suction and discharge of water collected in the foundation pits. However, there are still the following problems in the current construction stage: 1. For deep foundation pits that have not set up drainage ditches in time or foundation pits facing extreme rainfall weather, rainwater will still accumulate. Due to the large amount of silt and impurities at the bottom of the foundation pit, the water in the foundation pit is turbid, and it is difficult to use traditional pumps to pump water. 1. To determine the deepest part of the foundation pit, the pumping position needs to be changed several times as the liquid level drops, making it difficult to quickly drain the water from the foundation pit; 2. At the same time, silt can easily cause the pumping pipe to be blocked, and even the silt will be pumped out together, causing soil loss and causing the foundation pit depth to deviate from the designed depth; 3. Traditional pumping pipes can only extend to the upper side of the foundation pit soil layer. When pumping to the bottom of the accumulated water, when the pumping pipe mouth is exposed to the air, the air and the accumulated water are sucked into the pumping pipe together, and the negative pressure is reduced; 4. The silt at the bottom of the foundation pit has a large water content, making it difficult to quickly carry out subsequent construction. Re-digging drainage ditches or water collection wells is time-consuming and labor-intensive, resulting in construction delays; In the prior art, a bridge culvert foundation pit dewatering device disclosed in announcement number CN214783262U uses a buoyancy block to make the water pumping port drop with the liquid level, and the conical filter screen arranged at the bottom filters impurities while using the water flow to drive the impeller to rotate to prevent the filter cover from being blocked; although this scheme can improve the filtering efficiency of the filter screen to achieve a self-cleaning effect, as the water level decreases, the greater the silt content in the accumulated water, the easier it is for the filter holes to be blocked, and once the lower end of the device contacts the silt, the resistance will increase, and it will be difficult for the impeller to rotate normally to perform the self-cleaning function of the filter screen, and even cause the filter holes to be completely trapped in the silt and blocked, and it will be impossible to continue to pump water; at the same time, this scheme is limited by structural limitations, resulting in a limited pumping height. Once the liquid level is lower than the uppermost filter hole, the negative pressure of the pumping pipe will decrease, making it difficult to completely drain the accumulated water; A foundation pit pumping and filtering device disclosed in announcement number CN114225552B is a structure provided at the lower end of a pumping pipe that can autonomously reduce the size of the pumping port as the liquid level drops, thereby ensuring that the pumping port is always below the liquid level during the pumping process. This can solve the above-mentioned problem of reduced negative pressure due to air extraction, but this solution can only pump water on the upper side of the sludge. In the absence of drainage ditches and sump tanks set up in advance, the problem of high water content in the sludge cannot be solved and the pumping position still needs to be changed multiple times to drain the accumulated water in the foundation pit. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention adopts a deep foundation pit sludge pumping device to solve the problems of incomplete pumping and high water content of sludge after pumping in the prior art.

[0004] The technical solution is a deep foundation pit sludge pumping device, including an upper shell, which is a bowl-shaped shell with an upper end opening, an outer sleeve is sleeved on the outer edge surface of the upper shell, and the outer sleeve is rotatably connected to the outer edge surface of the upper shell through a bearing, a through hole is opened on the lower end surface of the upper shell, an annular plate is coaxially fixed on the upper side of the through hole, a plurality of first water inlets uniformly 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, 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, and an annular first water retaining plate and a first water retaining plate are respectively provided on the outer edge surface of the annular plate and the upper side of the outer edge surface of the vertical pipe. Two water baffles, 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 inlet is opened and the second water inlet is closed, when the first water baffle and the second water baffle move downward, the first water inlet is closed and the second water inlet is opened, water flows into the upper shell through the first water inlet, so as to drive the upper shell to rotate around the axis; an annular buoyancy block that can move up and down is mounted on the outside of 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 shell is arranged on the lower side of the upper shell, the lower shell is made of a water-permeable material as a whole and the lower end face of the lower shell is a conical face with the tip facing downward.

[0005] Preferably, a first support plate is fixed to the upper end surface of the annular plate, a vertical tube 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 plate and the second water baffle plate, a tension spring is fixed between the first support plate and the second support plate, the tension spring ensures that the first water baffle plate and the second water baffle plate are always located at the lower end, a vertical through groove is 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 through grooves on the corresponding sides and can slide up and down along the through grooves, and the inner ends of the cross bars are fixedly connected to the second support plate.

[0006] Preferably, a plurality of guide plates are fixed to the inner edge surface of the upper shell, and all the guide plates are evenly distributed along the circumference and are placed at the same inclined angle along the circumferential direction.

[0007] Preferably, a plurality of first water-permeable holes are evenly arranged on the side surface of the lower shell body, a filter cartridge is coaxially arranged on the inner side of the lower shell body, the filter cartridge is made of a water-permeable material and its outer edge surface is in contact with the inner edge surface of the lower shell body and can rotate freely around the axis, second water-permeable holes corresponding to the first water-permeable holes are arranged on the side surface of the filter cartridge, an impeller is fixed on the lower side of the filter cartridge, the middle part of the impeller is rotatably connected to the vertical pipe through a bearing, a horizontal groove is arranged on 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 groove, when the impeller rotates relative to the vertical pipe, the limiting block can contact with the side wall of the groove to prevent the impeller from rotating; a torsion spring is arranged between the impeller and the vertical pipe, the torsion spring makes the limiting block always contact with one of the side walls of the groove, and all the second water-permeable holes are not connected with the first water-permeable holes.

[0008] Preferably, a vertical brush plate is fixed to the lower end surface of the outer sleeve on the left and right sides of the vertical rod respectively, and bristles are arranged on one side of the brush plate close to the lower shell body, and the bristles are in contact with the outer edge surface of the lower shell body.

[0009] Preferably, a plurality of ribs evenly distributed along the circumference are fixed to the outer edge surface of the buoyancy block, and both the ribs and the buoyancy block are made of foam material.

[0010] Preferably, the conical surface of the lower end face of the lower shell is provided with threads, and the outer edge surface of the lower shell is provided with a plurality of vertical plates evenly distributed along the circumference of the axis of the lower shell.

[0011] 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.

[0012] Compared with the prior art, the present invention has the following advantages: 1. The present invention is installed at the water inlet of the water pumping pipe, so that the water inlet can drop with the liquid level under the action of the buoyancy block, thereby avoiding the removal of a large amount of silt at the bottom of the foundation pit when pumping from bottom to top, which will block the pipe and cause the loss of soil in the foundation pit; 2. When the guide plate is impacted by the water flow, it drives the upper shell to rotate around the axis, cooperates with the brush plate, and uses the centrifugal force and the blocking force of the brush plate to clear the blockage on the outside of the vertical rod to avoid the blockage of the lower shell; the rotation of the upper shell drives the lower shell to rotate synchronously, and when the conical surface at the lower end of the lower shell contacts the silt, it can drill into the silt under the action of its own gravity and thread. Even if the bottom height of the foundation pit is uneven, the lower end of the vertical pipe can be made lower than the lowest point of the foundation pit as much as possible, so that the water on the upper side of the silt can be completely drained; 3. The buoyancy block drives the first water baffle plate and the second water baffle plate to move up and down synchronously with the liquid level. When the liquid level is lower than the buoyancy block, the first water baffle plate blocks all the first water inlets, and the second water baffle plate removes the blockage of all the second water inlets. The water flow can only be sucked upward through the lower end of the vertical pipe. As the water flow through the impeller increases, the impeller rotates to connect all the first water permeable holes with the second water permeable holes, greatly improving the water permeability efficiency, preventing the silt at the bottom 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; 4. The lower shell is made of permeable material, which makes it easy to collect and pump out the water in the sludge after the water in the foundation pit is pumped out, greatly increasing the water loss rate of the sludge at the bottom of the foundation pit, thereby quickly resuming construction and shortening the construction period; 5. By setting the vertical pipe diameter much smaller than the through hole, even if the amount of water seeping into the lower shell is small, it can be sucked upward into the vertical pipe. When the liquid level is lower than the lower opening of the vertical pipe, since the upper end of the lower shell is always above the sludge, air can enter the vertical pipe through the lower shell. After the negative pressure of the lower shell, the sludge is blocked for suction, resulting in excessive negative pressure in the pipeline and damaging the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the front view of the present invention.

[0014] Figure 2 It is a front cross-sectional view of the present invention.

[0015] Figure 3 It is a top sectional view of the impeller part of the present invention.

[0016] Figure 4 This is a front cross-sectional view of the buoyancy block of the present invention suspended on the water surface.

[0017] Figure 5 It is a three-dimensional parts diagram of the buoyancy block, rib plate, second support plate, first water retaining plate and cross bar of the present invention.

[0018] Figure 6 It is a three-dimensional parts diagram of the upper shell, the annular plate, the first support plate and the guide plate of the present invention. DETAILED DESCRIPTION

[0019] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0020] Depend on Figures 1 to 6The present invention comprises an upper shell 1, which 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, and the outer sleeve 2 is rotatably connected to the outer edge surface of the upper shell 1 through a bearing. A through hole 3 is provided on the lower end surface of the upper shell 1, and an annular plate 4 is coaxially fixed on the upper side of the through hole 3. A plurality of first water inlets 5 uniformly distributed along the circumference are provided on the outer edge surface of the annular plate 4, and a vertical pipe 6 is coaxially fixed in the middle part 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, and 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. The first water baffle 8 It moves up and down synchronously with the second water baffle plate 9. When the first water baffle plate 8 and the second water baffle plate 9 move upward, the first water inlet 5 is opened and the second water inlet 7 is closed. When the first water baffle plate 8 and the second water baffle plate 9 move downward, the first water inlet 5 is closed and the second water inlet 7 is opened. Water flows into the upper shell 1 through the first water inlet 6, so as to drive the upper shell 1 to rotate around the axis. An annular buoyancy block 10 that can move up and down is mounted on the outside of the outer sleeve 2. The buoyancy block 10 can drive the first water baffle plate 8 and the second water baffle plate 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 face of the lower shell 11 is a conical face with the tip facing downward.

[0021] A first support plate 12 is fixed to 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 8 and the second water baffle 9, a tension spring is fixed between the first support plate 12 and the second support plate 13, the tension spring makes the first water baffle 8 and the second water baffle 9 always located at the lower end, a vertical through groove 14 is respectively opened 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 groove 14 on the corresponding sides and can slide up and down along the through groove 14, and the inner end of the cross bar 15 is fixedly connected to the second support plate 13.

[0022] A plurality of guide plates 16 are fixed to the inner edge of the upper shell 1 , and all the guide plates 16 are evenly distributed along the circumference and are placed at the same angle along the circumferential direction. Water flowing through the guide plates 16 can exert a torque on the upper shell 1 to rotate along the axis.

[0023] The lower shell 11 is evenly provided with a plurality of first water-permeable holes 17 on the side thereof, 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 the outer edge surface is in contact with the inner edge surface of the lower shell 11 and can rotate freely around the axis, the filter cartridge 18 is provided with a second water-permeable hole 19 corresponding to the first water-permeable hole 17 on the side thereof, an impeller 20 is fixed on the lower side of the filter cartridge 18, the middle part of the impeller 20 is rotatably connected to the vertical pipe 6 through a bearing, and a horizontal sink 21 is provided on one end surface of the impeller 20 in contact with the vertical pipe 6 The outer edge surface of the vertical pipe 6 is located in the sink 21 to fix the limit block 22. When the impeller 20 rotates relative to the vertical pipe 6, the limit block 22 can contact the side wall of the sink 21 to prevent the impeller 20 from rotating. A torsion spring is arranged between the impeller 20 and the vertical pipe 6. The torsion spring makes the limit block 22 always contact one side wall of the sink 21, and all the second water permeable holes 19 are not connected with the first water permeable holes 17. When water flows through the impeller 20 from top to bottom, it can drive the impeller 20 to rotate until the limit block 22 contacts the other side wall of the sink 21.

[0024] A vertical brush plate 23 is fixed to the lower end surface of the outer sleeve 2 on the left and right sides of the vertical rod 9 , respectively. The brush plate 23 is provided with bristles on one side close to the lower shell 11 , and the bristles are in contact with the outer edge surface of the lower shell 11 .

[0025] A plurality of ribs 24 evenly distributed along the circumference are fixed to the outer edge surface of the buoyancy block 10 , and both the ribs 24 and the buoyancy block 10 are made of foam material.

[0026] The conical surface of the lower end face of the lower shell 11 is provided with threads, 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.

[0027] The aperture 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 .

[0028] It is worth mentioning that in order to improve the torsional resistance of the outer sleeve 2, a corrugated pipe with greater torsional strength can be set as a pumping pipe, or a telescopic rod can be fixed at the upper end of the foundation pit so that the telescopic rod is fixedly connected to the outer sleeve 2. This will not affect the movement of the outer sleeve 2 up and down with the liquid level, and can improve the torsional resistance of the outer sleeve.

[0029] When the present invention is used, the outer casing 2 is first connected to the water pump through the water pump pipe, and then the lower shell 11 is placed in the water in the foundation pit with the conical end facing downward. Under the buoyancy of the buoyancy block 10, the outer casing 2 is suspended above the liquid surface. Figure 4In the state shown, the upper shell 1 and the lower shell 11 are both located below the liquid surface. The water pump is started, and water flows through the through hole 3 and enters the upper shell 1 and is pumped upward out of the foundation pit through the pipeline. The water flow entering the outer casing 2 through the second water inlet 7 is much smaller than the water flow entering through the first water inlet 5. The impeller 20 is not sufficient to overcome the torsion force of the torsion spring and rotate to the connecting position between the first water permeable hole 17 and the second water permeable hole 19. When the water flows into the upper shell 1 through the first water inlet 5, it is driven by the diversion effect of the inclined guide plate 16 to drive the upper shell 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 casing 2 does not rotate with the upper shell 1, and a relative rotation occurs between the brush plate 23 and the lower shell 11, and the bristles on the brush plate 23 can The obstruction on the outer side of the body 11 is cleaned to avoid blockage. As the liquid level gradually drops to the point where the lower end surface of the lower shell 11 contacts the bottom of the foundation pit, since the lower shell 11 always rotates with the upper shell 1, the tapered surface at the lower end of the lower shell 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 of the lower shell 11 contacts the upper end surface of the silt to generate a large resistance, and the lower shell 11 stops rotating. At this time, as the liquid level continues to drop, the upper shell 1 and the outer sleeve 2 are supported by the lower shell 11 and no longer continue to drop. 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 attached Figure 2 In the state shown, the first water baffle 8 blocks all the first water inlets 5, and the second water baffle 9 removes the obstruction to all the second water inlets 7, so that the water flow can only be sucked upward through the lower end of the vertical pipe 6. As the water flow passing 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, thereby accelerating the suction of the water accumulated above the sludge. Since the lower half of the lower shell 11 is placed in the sludge and the lower shell 11 is made of a permeable material, the vertical pipe 6 can continue to suck the water that has seeped into the lower shell 11 from the inner side of the sludge after draining the water accumulated on the upper side of the sludge. Since the caliber of the vertical pipe 6 is much smaller than the through hole 3, even if the amount of water that has seeped into the lower shell 11 is small, it can be sucked upward into the vertical pipe 6. At this time, in order to save energy, the water pump can be pumped in an intermittent suction mode to avoid idling of the motor when the amount of seepage is small. In order to speed up the pumping efficiency, multiple groups of this device can be set up to pump water simultaneously at different positions of the foundation pit.

[0030] The present invention uses the buoyancy block 10 to descend with the liquid level to avoid pumping away a large amount of silt at the bottom of the foundation pit when pumping from bottom to top. At the same time, the water accumulated in the silt can be pumped out after the water level drops, greatly improving the foundation pit pumping efficiency without frequent manual operations.

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). A plurality of first water inlets (5) uniformly 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) protrudes from 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) are 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 water plate (9) moves up and down synchronously. When the first water baffle plate (8) and the second water baffle plate (9) move upward, the first water inlet (5) is opened and the second water inlet (7) is closed. When the first water baffle plate (8) and the second water baffle plate (9) move downward, the first water inlet (5) is closed and the second water inlet (7) is opened. Water flows into the upper shell (1) through the first water inlet (6) so as to drive the upper shell (1) to rotate around the axis. An annular buoyancy block (10) that can move up and down is mounted on the outer side of the outer sleeve (2). The buoyancy block (10) can drive the first water baffle plate (8) and the second water baffle plate (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.

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: 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).

5. 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) on the left and right sides of the vertical rod (9), respectively. The brush plate (23) is provided with bristles on one side close to the lower shell (11), and the bristles are in contact with the outer edge surface of the lower shell (11).

6. 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.

7. 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).

8. 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).

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