Civil construction foundation pit drainage structure and drainage method thereof

Abstract

The application relates to the technical field of drainage structures, and discloses a civil construction foundation pit drainage structure and a drainage method thereof, which comprises a supporting mechanism, and the supporting mechanism further comprises a rotating motor; the civil construction foundation pit drainage structure is externally provided with a preliminary filter plate; when the rotating motor is connected to the power supply, the water pumping fan blade is driven to extract water, at this time, negative pressure is formed at the bottom of the water pumping fan blade, and the larger silt is adsorbed in the preliminary filter plate, so that the operation of the equipment is not affected, the silt adsorbed on the outer wall of the preliminary filter plate also has a filtering effect, after the water in the foundation pit is accumulated, the bottom soil is soft, the pipeline extraction mode is easy to cause the internal blockage of the pipeline, and the working efficiency of the equipment is seriously affected; the civil construction foundation pit drainage structure is flat, is suitable for various pits, the equipment is placed in the foundation pit through a rope fixing plate by staff, sewage enters the equipment through the water pumping fan blade, at this time, the centrifugal force is affected, the silt is screened through the cleaning fan blade, and the effect of secondary filtration is achieved.

Description

Technical Field

[0001] This invention relates to the field of drainage equipment technology, specifically to a drainage device for foundation pits in civil engineering construction. Background Technology

[0002] During civil construction, foundation pits need to be built. During the excavation of foundation pits, groundwater and surface water often seep in, causing site flooding, damaging the stability of the foundation pit slope, and affecting the construction process. Therefore, it is necessary to do a good job in drainage and flood discharge of the foundation pit site. Open ditch drainage and well point dewatering are usually used. In both of these drainage methods, water pumps are used to pump and transfer water to achieve drainage inside the foundation pit and keep the foundation pit dry.

[0003] The water source in the civil engineering pit contains a lot of fine sand and soil. After settling, it is very easy to accumulate on the bottom wall of the water collection well. This makes the end of the hose connected to the water pump very susceptible to blockage and interference from the fine sand, which can damage the water pump. To address the above problems, the following solutions are proposed. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a drainage device for foundation pits in civil engineering construction, including a support mechanism, the support mechanism further including a rotating motor, a motor support column rotatably connected to the bottom outer wall of the rotating motor, and a rotating plate fixedly connected to the outer wall of the motor support column.

[0005] The filter mechanism includes a filter top plate fixedly connected to the outer wall of the bottom of the motor support, a filter main column fixedly connected to the bottom center of the filter top plate, and a fan blade bottom plate fixedly connected to the end of the filter main column away from the filter top plate.

[0006] The extraction mechanism includes a motor bracket fixedly connected to the outer wall of the rotating motor, and a transmission belt is sleeved on the outer wall of the rotating plate.

[0007] Preferably, the support mechanism also includes a top plate fixedly connected to the outer wall of the bottom of the motor bracket. The inner wall of the through hole on the top plate is rotatably connected to the outer wall of the motor support. Several rope fixing plates are fixedly connected to the top outer wall of the top plate. This mechanism provides an installation position for subsequent mechanisms and plays a stabilizing role during operation, ensuring normal operation of the equipment and avoiding problems such as bumps.

[0008] Preferably, the support mechanism further includes a fixed inclined plate fixedly connected to the outer wall of the equipment top plate. A water collection trough is fixedly connected to the end of the fixed inclined plate away from the equipment top plate. A fixed outer plate is fixedly connected to the outer wall of the fixed inclined plate. A water pumping plate is connected through the side wall of the water collection trough. The present invention is internally provided with a fixed inclined plate, an equipment top plate, and a fixed outer plate. The tight fit between the equipment top plate and the fixed inclined plate increases the stability of the equipment during operation.

[0009] Preferably, the filtration mechanism further includes a pumping fan blade fixedly connected to the outer wall of the fan blade base plate, a filter screen fixedly connected to the bottom outer wall of the filter top plate, and several unblocking columns fixedly connected to the bottom outer wall of the equipment top plate. The outer wall of the unblocking column is rotatably connected to the inner wall of the holes in the filter screen. After water accumulates inside the pit, the bottom soil is soft. Using a pipe extraction method can easily lead to blockage inside the pipe, which seriously affects the working efficiency of the equipment. Moreover, the present invention has a flat shape and is suitable for various pits. Employees place the equipment inside the pit by securing the plate with ropes. Sewage enters the equipment through the pumping fan blade. At this time, under the influence of centrifugal force, a secondary filtration effect is achieved.

[0010] Preferably, the filtration mechanism further includes a filter inclined plate fixedly connected to the inner wall of the filter screen, with a filter floor rotatably connected to the end of the filter inclined plate away from the filter screen, a cleaning bracket fixedly connected to the outer wall of the motor support, a plurality of cleaning fan blades fixedly connected to the bottom outer wall of the cleaning bracket, the bottom of the plurality of cleaning fan blades being slidably connected to the top of the filter floor, a plurality of support columns fixedly connected to the bottom outer wall of the water collection tank, the end of the support column away from the water collection tank being fixedly connected to the bottom of the equipment top plate, and a plurality of preliminary filter plates fixedly connected to the bottom outer wall of the filter floor. With the preliminary filter plates externally installed, when the rotating motor is powered on, it drives the water pumping fan blades to extract water. At this time, a negative pressure is formed with the bottom of the water pumping fan blades, causing larger sediments to be adsorbed onto the preliminary filter plates. While avoiding affecting the operation of the equipment, the sediment adsorbed on the outer wall of the preliminary filter plates also achieves a filtering effect.

[0011] Preferably, the extraction mechanism further includes a rotating gear rotatably connected to the outer wall of the top of the equipment top plate. The outer wall of the rotating gear is rotatably connected to the inner wall of the conveyor belt. A transmission top plate is fixedly connected to the outer wall of the top of the equipment top plate. A rotating column is rotatably connected to the inner wall of the hole on the transmission top plate. A linkage gear is fixedly connected to the end of the rotating column near the rotating gear. The outer wall of the linkage gear is rotatably connected to the outer wall of the rotating gear. Through the above process, the water flow comes into contact with the inner wall of the filter screen. Debris is blocked by the filter screen and accumulates on the inner wall of the filter screen. To solve the problem of filter screen blockage, a clearing column is set inside the equipment. Through the linkage between the clearing column and the mesh inside the filter screen, the effect of clearing the mesh is achieved. In addition, the water flow transmitted from the cleaning fan blades will continue to flush the inner wall of the filter screen to solve the blockage problem.

[0012] Preferably, the extraction mechanism further includes an inner extraction plate fixedly connected to the end of the rotating column away from the linkage gear. Several extraction plates are rotatably connected to the outer wall of the inner extraction plate. A water pump housing is fixedly connected to the top outer wall of the equipment top plate. A water pipe is fixedly connected to the inner wall of the water pump housing. The outer wall of the water pipe is rotatably connected to the outer wall of the extraction plate. The bottom of the water pipe is connected to the bottom of the extraction plate. The present invention is internally configured with an inner extraction plate, extraction plates, and water pipes. Under the action of the linkage gear driving the rotation, the inner extraction plate drives the extraction plates to continuously squeeze the water pipe, creating a partial vacuum in the water pipe and continuously generating huge suction force, so that liquid is continuously sucked into the pipe. The biggest advantage of this design is isolation, avoiding direct contact between equipment components and sewage, which would cause sewage impurities to affect the operation of the water pump.

[0013] A method for manufacturing a drainage device for foundation pits in civil engineering construction includes the following steps:

[0014] S1: When using the equipment, turn on the power to the rotating motor, and the rotating motor will drive the water pumping fan to extract water from the pit.

[0015] S2: After the equipment completes pumping, the pumped liquid is filtered by the cleaning fan blades and filter screen to remove the mud and sand inside the equipment and avoid affecting the subsequent pumping process.

[0016] S3: During the filtration process, the unblocking column unblocks the inner wall of the filter screen, and through the linkage of the rotating gear and the linkage gear, the water pipe draws the filtered water from inside the water tank.

[0017] The present invention has the following beneficial effects:

[0018] (1) The present invention is provided with a preliminary filter plate. When the rotating motor is powered on, it drives the water pumping fan to perform the process of pumping water. At this time, a negative pressure is formed with the bottom of the water pumping fan. Larger silt will be adsorbed on the preliminary filter plate. While avoiding affecting the operation of the equipment, the silt adsorbed on the outer wall of the preliminary filter plate also plays a filtering role.

[0019] (2) After water accumulates inside the foundation pit, the bottom soil becomes soft. Using a pipe to extract the water can easily cause blockage inside the pipe, which seriously affects the working efficiency of the equipment. In addition, the present invention has a flat shape and is suitable for various pits. Employees place the equipment inside the foundation pit by securing the plate with ropes. Sewage enters the equipment through the pumping fan blades. At this time, due to the influence of centrifugal force, the secondary filtration effect is achieved by cleaning the fan blades.

[0020] (3) Through the above process, the water flow comes into contact with the inner wall of the filter screen, and the debris is blocked by the filter screen and accumulates on the inner wall of the filter screen. In order to solve the problem of filter screen blockage, the equipment is equipped with a dredging column. Through the linkage between the dredging column and the mesh inside the filter screen, the effect of dredging the mesh is achieved. In addition, the water flow transmitted from the cleaning fan blade will continue to flush the inner wall of the filter screen to solve the blockage problem.

[0021] (4) The present invention is internally equipped with an inner extraction plate, an extraction plate, and a water pipe. Under the action of the linkage gear driving the rotation, the inner extraction plate drives the extraction plate to continuously squeeze the water pipe, causing a partial vacuum in the water pipe and continuously generating huge suction force, so that the liquid is continuously sucked into the pipe. The biggest advantage of this design is isolation, which avoids the equipment components from directly contacting the sewage, causing sewage impurities to affect the operation of the water pump. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional view of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 3 This is a cross-sectional schematic diagram of the support mechanism of the present invention;

[0026] Figure 4 This is a schematic diagram of the filtration mechanism of the present invention;

[0027] Figure 5 For the present invention Figure 4 Enlarged view of A in the middle;

[0028] Figure 6 This is a cross-sectional schematic diagram of the filtration mechanism of the present invention;

[0029] Figure 7 This is a cross-sectional schematic diagram of the extraction mechanism of the present invention;

[0030] Figure 8 This is a schematic diagram of the operation of the drainage device of the present invention.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] In the diagram: 1. Support mechanism; 101. Rotating motor; 102. Motor support column; 103. Rotating plate; 104. Equipment top plate; 105. Rope fixing plate; 106. Fixing inclined plate; 107. Water collection tank; 108. Fixing outer plate; 109. Pumping plate; 2. Filtration mechanism; 201. Filter top plate; 202. Filter main column; 203. Fan blade bottom plate; 204. Pumping fan blade; 205. Filter screen; 206. Unblocking column 207. Filter inclined plate; 208. Filter floor; 209. Cleaning bracket; 210. Cleaning fan blade; 211. Support column; 212. Preliminary filter plate; 3. Extraction mechanism; 301. Motor bracket; 302. Transmission belt; 303. Rotating gear; 304. Transmission top plate; 305. Rotating column; 306. Linkage gear; 307. Extraction inner plate; 308. Extraction plate; 309. Water pump housing; 310. Water pipe; Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1, please refer to Figure 1 - Figure 3 This invention relates to a drainage device for foundation pits in civil engineering construction, comprising a support mechanism 1, which further includes a rotating motor 101. A motor support column 102 is rotatably connected to the bottom outer wall of the rotating motor 101, and a rotating plate 103 is fixedly connected to the outer wall of the motor support column 102.

[0035] The filter mechanism 2 includes a filter top plate 201 fixedly connected to the bottom outer wall of the motor support 102, a filter main column 202 fixedly connected to the bottom center of the filter top plate 201, and a fan blade bottom plate 203 fixedly connected to the end of the filter main column 202 away from the filter top plate 201.

[0036] The extraction mechanism 3 includes a motor bracket 301 fixedly connected to the outer wall of the rotating motor 101, and a conveyor belt 302 sleeved on the outer wall of the rotating plate 103.

[0037] The support mechanism 1 also includes a top plate 104 fixedly connected to the bottom outer wall of the motor bracket 301. The inner wall of the through hole on the top plate 104 is rotatably connected to the outer wall of the motor support 102. Several rope fixing plates 105 are fixedly connected to the top outer wall of the top plate 104. This mechanism provides an installation position for subsequent mechanisms and plays a stabilizing role during operation, ensuring normal operation of the equipment and avoiding problems such as bumps.

[0038] The support mechanism 1 also includes a fixed inclined plate 106 fixedly connected to the outer wall of the equipment top plate 104. A water collection tank 107 is fixedly connected to one end of the fixed inclined plate 106 away from the equipment top plate 104. A fixed outer plate 108 is fixedly connected to the outer wall of the fixed inclined plate 106. A water pumping plate 109 is connected through the side wall of the water collection tank 107. The present invention is internally provided with a fixed inclined plate 106, an equipment top plate 104, and a fixed outer plate 108. The tight fit between the equipment top plate 104 and the fixed inclined plate 106 increases the stability of the equipment during operation.

[0039] Example 2, please refer to Figure 4 - Figure 8 This invention relates to a drainage device for foundation pits in civil engineering construction. Based on Example 1, the filtration mechanism 2 further includes a pumping fan blade 204 fixedly connected to the outer wall of the fan blade base plate 203. A filter screen 205 is fixedly connected to the bottom outer wall of the filter top plate 201, and several dredging columns 206 are fixedly connected to the bottom outer wall of the equipment top plate 104. The outer wall of the dredging column 206 is rotatably connected to the inner wall of the holes in the filter screen 205. After water accumulates inside the foundation pit, the bottom soil becomes soft. Using a pipe extraction method can easily lead to blockage inside the pipe, seriously affecting the working efficiency of the equipment. Moreover, this invention has a flat shape and is suitable for various types of pits. Employees place the equipment inside the foundation pit using ropes to secure the plate 105. Sewage enters the equipment through the pumping fan blade 204, where it is subjected to centrifugal force, achieving a secondary filtration effect.

[0040] The filtration mechanism 2 also includes a filter inclined plate 207 fixedly connected to the inner wall of the filter screen 205. A filter floor 208 is rotatably connected to the end of the filter inclined plate 207 away from the filter screen 205. A cleaning bracket 209 is fixedly connected to the outer wall of the motor support 102. Several cleaning fan blades 210 are fixedly connected to the bottom outer wall of the cleaning bracket 209. The bottoms of the cleaning fan blades 210 are slidably connected to the top of the filter floor 208. Several support columns 211 are fixedly connected to the bottom outer wall of the water collection tank 107. The support columns 211 are located at... One end of the water collection tank 107 is fixedly connected to the bottom of the equipment top plate 104. Several preliminary filter plates 212 are fixedly connected to the bottom outer wall of the filter floor 208. The invention is provided with preliminary filter plates 212 on the outside. When the rotating motor 101 is powered on, it drives the water pumping fan 204 to perform the process of pumping water. At this time, a negative pressure is formed with the bottom of the water pumping fan 204. Larger silt will be adsorbed on the preliminary filter plates 212. While avoiding affecting the operation of the equipment, the silt adsorbed on the outer wall of the preliminary filter plates 212 also plays a filtering role.

[0041] The extraction mechanism 3 also includes a rotating gear 303 rotatably connected to the outer wall of the top of the equipment top plate 104. The outer wall of the rotating gear 303 is rotatably connected to the inner wall of the conveyor belt 302. A transmission top plate 304 is fixedly connected to the outer wall of the top of the equipment top plate 104. A rotating column 305 is rotatably connected to the inner wall of the hole on the transmission top plate 304. A linkage gear 306 is fixedly connected to one end of the rotating column 305 near the rotating gear 303. The outer wall of the linkage gear 306 is connected to the outer wall of the rotating gear 303. With the wall rotating connection, through the above process, the water flow comes into contact with the inner wall of the filter screen 205, and the debris is blocked and accumulates on the inner wall of the filter screen 205. In order to solve the problem of filter screen 205 clogging, the equipment is equipped with a clearing column 206. Through the linkage between the clearing column 206 and the mesh inside the filter screen 205, the mesh is cleared. In addition, the water flow transmitted from the cleaning fan blade 210 will continue to flush the inner wall of the filter screen 205 to solve the clogging problem.

[0042] The extraction mechanism 3 also includes an inner extraction plate 307 fixedly connected to the end of the rotating column 305 away from the linkage gear 306. Several extraction plates 308 are rotatably connected to the outer wall of the inner extraction plate 307. A water pump housing 309 is fixedly connected to the top outer wall of the equipment top plate 104. A water pipe 310 is fixedly connected to the inner wall of the water pump housing 309. The outer wall of the water pipe 310 is rotatably connected to the outer wall of the extraction plate 308. The bottom of the water pipe 310 is connected to the bottom of the pumping plate 109. The present invention is internally configured with an inner extraction plate 307, extraction plates 308, and water pipe 310. Under the action of the linkage gear 306 driving the rotation, the inner extraction plate 307 drives the extraction plates 308 to continuously squeeze the water pipe 310, causing a partial vacuum in the water pipe 310 and continuously generating huge suction force, so that liquid is continuously sucked into the pipe. The biggest advantage of this design is isolation, avoiding direct contact between equipment components and sewage, which would cause sewage impurities to affect the operation of the pump.

[0043] The drainage method of this drainage device includes the following steps:

[0044] S1: When using the equipment, turn on the power supply of the rotating motor 101, and drive the water pumping fan blade 204 to extract water from the pit through the rotating motor 101.

[0045] S2: After the equipment completes pumping, the pumped liquid is screened by the cleaning fan blades 210 and the filter screen 205 to filter out the mud and sand inside the equipment and avoid affecting the subsequent pumping process.

[0046] S3: During the filtration process, the unblocking column 206 unblocks the inner wall of the filter screen 205, and through the linkage of the rotating gear 303 and the linkage gear 306, the water pipe 310 draws the filtered water from inside the water collection tank 107.

[0047] A specific application of this embodiment is as follows: When using the equipment, the power to the rotating motor 101 is turned on, and the employee places the equipment inside the pit using the rope fixing plate 105. Sewage enters the equipment through the pumping fan blades 204. At this time, due to centrifugal force, the equipment is filtered by the cleaning fan blades 210. A preliminary filter plate 212 is installed on the outside. When the rotating motor 101 is turned on, it drives the pumping fan blades 204 to extract water. At this time, a negative pressure is formed at the bottom of the pumping fan blades 204, and larger silt is adsorbed onto the preliminary filter plate 212. While avoiding affecting the operation of the equipment, the silt adsorbed on the outer wall of the preliminary filter plate 212 also has a filtering effect. Through the above process, the water flow and... The inner wall of the filter screen 205 is in contact with debris, which is blocked and accumulates on the inner wall of the filter screen 205. To solve the problem of clogging of the filter screen 205, a clearing column 206 is installed inside the equipment. Through the linkage between the clearing column 206 and the mesh of the filter screen 205, the mesh is cleared. In addition, the water flow transmitted from the cleaning fan blade 210 will continuously flush the inner wall of the filter screen 205 to solve the clogging problem. Under the action of the linkage gear 306, the inner plate 307 drives the extraction plate 308 to continuously squeeze the water pipe 310, creating a partial vacuum in the water pipe 310 and continuously generating huge suction force, which continuously draws the liquid into the pipe and then discharges it to the outside of the equipment.

[0048] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A drainage device for a foundation pit in civil engineering construction, comprising a support mechanism (1), wherein the support mechanism (1) further comprises a rotating motor (101), wherein a motor support column (102) is rotatably connected to the bottom outer wall of the rotating motor (101), and a rotating plate (103) is fixedly connected to the outer wall of the motor support column (102), characterized in that, Also includes: The filter mechanism (2) includes a filter top plate (201) fixedly connected to the bottom outer wall of the motor support (102), a filter main column (202) fixedly connected to the bottom center of the filter top plate (201), and a fan blade bottom plate (203) fixedly connected to the end of the filter main column (202) away from the filter top plate (201). The extraction mechanism (3) includes a motor bracket (301) fixedly connected to the outer wall of the rotating motor (101), and a transmission belt (302) is sleeved on the outer wall of the rotating plate (103). The support mechanism (1) also includes a top plate (104) fixedly connected to the bottom outer wall of the motor bracket (301). The inner wall of the through hole on the top plate (104) is rotatably connected to the outer wall of the motor support (102). Several rope fixing plates (105) are fixedly connected to the top outer wall of the top plate (104). The support mechanism (1) further includes a fixed inclined plate (106) fixedly connected to the outer wall of the equipment top plate (104). A water collection tank (107) is fixedly connected to one end of the fixed inclined plate (106) away from the equipment top plate (104). A fixed outer plate (108) is fixedly connected to the outer wall of the fixed inclined plate (106). A water pumping plate (109) is connected through the side wall of the water collection tank (107). The filtration mechanism (2) also includes a pumping fan blade (204) fixedly connected to the outer wall of the fan blade base plate (203), a filter screen (205) fixedly connected to the bottom outer wall of the filter top plate (201), and a plurality of unblocking columns (206) fixedly connected to the bottom outer wall of the equipment top plate (104). The outer wall of the unblocking column (206) is rotatably connected to the inner wall of the holes in the filter screen (205). The filtration mechanism (2) further includes a filter inclined plate (207) fixedly connected to the inner wall of the filter screen (205). The end of the filter inclined plate (207) away from the filter screen (205) is rotatably connected to a filter floor (208). A cleaning bracket (209) is fixedly connected to the outer wall of the motor support (102). Several cleaning fan blades (210) are fixedly connected to the bottom outer wall of the cleaning bracket (209). The bottom of the several cleaning fan blades (210) is slidably connected to the top of the filter floor (208). Several support columns (211) are fixedly connected to the bottom outer wall of the water collection tank (107). The end of the support column (211) away from the water collection tank (107) is fixedly connected to the bottom of the equipment top plate (104). Several preliminary filter plates (212) are fixedly connected to the bottom outer wall of the filter floor (208). The extraction mechanism (3) further includes a rotating gear (303) rotatably connected to the outer wall of the top of the equipment top plate (104). The outer wall of the rotating gear (303) is rotatably connected to the inner wall of the conveyor belt (302). A transmission top plate (304) is fixedly connected to the outer wall of the top of the equipment top plate (104). A rotating column (305) is rotatably connected to the inner wall of the hole on the transmission top plate (304). A linkage gear (306) is fixedly connected to one end of the rotating column (305) near the rotating gear (303). The outer wall of the linkage gear (306) is rotatably connected to the outer wall of the rotating gear (303). The extraction mechanism (3) further includes an extraction inner plate (307) fixedly connected to the end of the rotating column (305) away from the linkage gear (306). The outer wall of the extraction inner plate (307) is rotatably connected to a plurality of extraction plates (308). The top outer wall of the equipment top plate (104) is fixedly connected to a water pump housing (309). The inner wall of the water pump housing (309) is fixedly connected to a water pipe (310). The outer wall of the water pipe (310) is rotatably connected to the outer wall of the extraction plate (308). The bottom of the water pipe (310) is connected to the bottom of the extraction plate (109). Water flows into contact with the inner wall of the filter screen (205). Impurities are blocked by the filter screen (205) and accumulate on the inner wall of the filter screen (205). To solve the problem of filter screen (205) blockage, the equipment is equipped with a dredging column (206). Through the linkage between the dredging column (206) and the mesh of the filter screen (205), the mesh is cleared. In addition, the water flow transmitted from the cleaning fan blade (210) will continuously flush the inner wall of the filter screen (205) to solve the blockage problem. Under the action of the linkage gear (306) driving the rotation, the inner plate (307) drives the extraction plate (308) to continuously squeeze the water pipe (310), so that the water pipe (310) has a partial vacuum and continuously generates huge suction force, so that the liquid is continuously sucked into the pipe and then discharged outside the equipment.

2. The drainage device for foundation pits in civil engineering construction according to claim 1, characterized in that, The method of using the drainage device includes the following steps: S1: When using the equipment, turn on the power of the rotating motor (101) and drive the water pumping fan (204) to extract water from the pit. S2: After the equipment completes pumping, the pumped liquid is screened by the cleaning fan blades (210) and the filter screen (205) to filter out the mud and sand inside the equipment and avoid affecting the subsequent pumping process. S3: During the filtration process, the unblocking column (206) unblocks the inner wall of the filter screen (205), and through the linkage of the rotating gear (303) and the linkage gear (306), the water pipe (310) draws the filtered water source inside the water tank (107).

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