A foundation pit drainage device and method for foundation pit construction

Abstract

The application provides a foundation pit drainage device and method for foundation pit construction, which comprises a placing assembly, a water pump, a drainage pipe, a water suction pipe, a pipe clamp and an anti-blocking assembly. The water pump, the drainage pipe and the water suction pipe are integrally collected and placed through the placing assembly, the convenience of use of the foundation pit drainage device is improved, an anti-skid piece is additionally arranged, the installation in different environments is facilitated, the flexibility is high, the stability during use of the drainage device is improved, the placing rod can rotate to realize unfolding and resetting, the flexibility is high, the use requirements can be met, the anti-blocking assembly is arranged, the hollow rotating rod I and the cleaning plate are arranged, the resistance of water rotation is reduced, the circumferential movement of the cleaning plate is facilitated, the cleaning difficulty is reduced, the outer wall of the assembly is cleaned, the vertically arranged fan blades do not affect the water suction, the water is quickly sucked, efficient cleaning and anti-blocking are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of foundation pit drainage, in particular to a foundation pit drainage device and method for foundation pit construction. BACKGROUND

[0002] The measures required to ensure the safety and stability of the underground space formed by excavating the ground downward during underground structure construction, such as retaining structures, groundwater control, and environmental protection, are referred to as foundation pit engineering. The main contents of foundation pit engineering include engineering investigation, support structure design and construction, earthwork excavation and backfilling, groundwater control, information-based construction, and surrounding environment protection. The simplest and most economical method for foundation pit construction is to enlarge the slope for excavation, but it is often limited by site conditions and the surrounding environment. Therefore, a support system needs to be designed to ensure the smooth progress of construction and to better protect the surrounding environment.

[0003] For example, a Chinese patent with the patent number CN202111589695.8 discloses a "foundation pit drainage device and method". Through the movement of the lead screw, two clamping blocks are driven to clamp the drainage pipe in the center, thereby avoiding disconnection of the drainage pipe from the water pump connection due to oscillation. The impact of water drives the cam to rotate, which in turn causes the cam to press the elastic connecting limit block, thereby driving the cleaning ring to move up and down to clean the outer wall of the filter screen cylinder. This not only cleans but also prevents blockage.

[0004] For example, a Chinese patent with the patent number CN202111463805.6 discloses a "foundation pit drainage device and construction method". By opening multiple water permeation holes in the side wall of the support plate, water on the inner wall of the foundation pit can be easily drained. The water permeation plate and water collection platform can quickly introduce small puddles and ditches at the bottom of the foundation pit into the water collection well, and the drainage assembly can drain the collected water, improving the drainage effect.

[0005] In existing foundation pit drainage operations, the necessary parts such as water pumps and water pipes are usually stored separately, which is inconvenient to carry. Moreover, the stability of the water pump placement can be affected in different construction environments, such as concrete and clay ground. In the patent CN202111589695.8, when there is too much water in the foundation pit, the slide, cam, and other components are submerged in water, causing the water flow to impact the fan blades and drive the cam to rotate. During the process of the cam pressing the spring and pushing the cleaning ring to move up and down in water, the fan blades are affected by water resistance. The water flow into the fan blades is blocked, and the water pump operation is burdened. SUMMARY

[0006] To solve the above technical problems, the purpose of the present application is to provide a foundation pit drainage device and method for foundation pit construction.

[0007] Based on this, the application provides a foundation pit drainage device and method for foundation pit construction, which comprises a placing assembly, a water pump, a drainage pipe, a water suction pipe, a pipe clamp, and a anti-blocking assembly.

[0008] The left end of the placing assembly is fixedly provided with the water pump, and the left and right ends of the water pump are respectively connected with the water suction pipe and the drainage pipe.

[0009] The top end of the anti-blocking assembly is fixedly provided with the pipe clamp.

[0010] The placing assembly comprises an L-shaped base plate, an anti-skid piece, a connecting channel, a support, a placing rod, a rotating rod, a connecting spring, a plug-in rod, a positioning plate, and a limiting opening. The left end of the L-shaped base plate is provided with the anti-skid piece, the right end of the L-shaped base plate is provided with the connecting channel, the bottom end of the support is fixedly connected with the L-shaped base plate, the bottom end of the placing rod is fixedly connected with the rotating rod, the rotating rod is rotatably connected with the support and the positioning plate, the rotating rod is internally provided with the connecting spring, the plug-in rod is elastically connected with the rotating rod through the connecting spring, the positioning plate is fixedly arranged at the front end of the L-shaped base plate, and the plug-in rod is embedded into the inside of the positioning plate.

[0011] Optionally, the anti-skid piece comprises a support frame, a strong spring, an L-shaped connecting plate, and an anti-skid plate. The bottom end of the support frame is fixedly connected with the L-shaped base plate, and the top end of the support frame is provided with the strong spring. The top end of the L-shaped connecting plate is elastically connected with the support frame through the strong spring, and the bottom end of the L-shaped connecting plate is fixedly provided with the anti-skid plate.

[0012] Optionally, the anti-blocking assembly comprises an assembly body, a filter cover, a counterweight, a connecting piece, a rotating rod one, a straight plate fan blade, a curved fan blade, a connecting frame, and a cleaning plate. The assembly body is fixedly connected with the water suction pipe through the pipe clamp, the top end of the assembly body is threadedly connected with the filter cover, the bottom end of the assembly body is fixedly provided with the counterweight, the connecting piece is arranged in the inside of the assembly body, the bottom end of the rotating rod one is rotatably connected with the connecting piece, the outer side of the rotating rod one is fixedly provided with the straight plate fan blade and the curved fan blade, the bottom end of the straight plate fan blade is fixedly connected with the curved fan blade, the left end of the connecting frame is fixedly connected with the straight plate fan blade, the right end of the connecting frame is fixedly connected with the cleaning plate, and the left end of the cleaning plate is in contact with the assembly body.

[0013] Optionally, the connecting piece comprises a base body, filter cloth, a top cover, a support seat, a fixing frame, and a ball. The bottom end of the base body is fixedly connected with the assembly body, the top end of the base body is threadedly connected with the top cover, the bottom end of the support seat is fixedly connected with the base body, the inside of the fixing frame is provided with the ball, and the left and right ends of the ball are respectively in contact with the support seat and the rotating rod one.

[0014] Optionally, the front end of the positioning plate is provided with a limiting opening, and a plug rod is embedded in the limiting opening.

[0015] Optionally, the sidewall of the base body is provided with two layers of inner and outer layers, and filter cloth is embedded in the inner and outer layers of the sidewall, so as to facilitate sufficient filtration of accumulated water, avoid fine sand and other small substances from entering the inside of the base body, and affect the movement of the ball and the fixing frame or increase the friction between the rotating rod and the support seat.

[0016] Optionally, a plurality of circular holes are arranged on the rotating rod and the cleaning plate, and a plurality of protrusions are arranged on the inner side of the cleaning plate.

[0017] Optionally, the bottom end of the rotating rod and the top end of the support seat are provided with circular arc-shaped sliding rails, and the fixing frame and the ball are movably arranged between the two sliding rails.

[0018] Optionally, the cross section of the placement rod is concave, so that the drainage pipe and the water suction pipe can be folded and bound in half and placed in the placement rod, thereby achieving stable support and avoiding disengagement from the support rod.

[0019] The present application has the following advantages: the present application provides a foundation pit drainage device and method for foundation pit construction, which has the following improvements compared with the same type of equipment:

[0020] Advantage 1: The present application provides a foundation pit drainage device and method for foundation pit construction, which is convenient for integrated collection and placement of the water pump, drainage pipe and water suction pipe, improves the convenience of use of the foundation pit drainage device, and is provided with anti-skid members inside the L-shaped base, which is convenient for use and installation in different environments, has high flexibility, improves the stability of the drainage device during use, and the placement rod can rotate to achieve expansion and resetting, has high flexibility, and is convenient for meeting the use requirements.

[0021] Advantage 2: The foundation pit drainage device and method for foundation pit construction provided by the application has the advantages that the anti-blocking assembly is arranged, the hollow rotating rod one and the cleaning plate are arranged, the resistance to rotation in water is reduced, the circumferential movement of the cleaning plate is facilitated, the cleaning difficulty is reduced, the outer wall of the assembly is cleaned, the friction when the rotating rod one rotates is reduced through the arrangement of the connecting piece, and the smoothness of rotation is increased. The above structures are convenient for the rotation and cleaning of the cleaning plate, the vertically arranged fan blades do not affect the pumping of accumulated water, the rapid pumping of accumulated water is realized, and efficient cleaning and anti-blocking are realized. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the application;

[0023] Figure 2 It is a schematic diagram of the overall structure of the application;

[0024] Figure 3 It is a schematic diagram of the overall structure of the application;

[0025] Figure 4 It is a schematic diagram of the overall structure of the application;

[0026] Figure 5 It is a schematic diagram of the overall structure of the application;

[0027] Figure 6 It is a schematic diagram of the overall structure of the application;

[0028] Figure 7 It is a schematic diagram of the overall structure of the application;

[0029] Figure 8 It is a schematic diagram of the overall structure of the application;

[0030] The drawing reference: placement assembly-1, water pump-2, drain pipe-3, water pump-4, pipe clamp-5, anti-blocking assembly-6, L-shaped base plate-11, anti-skid piece-12, connecting channel-13, support-14, placement rod-15, rotating rod-16, connecting spring-17, plug rod-18, positioning plate-19, limiting port-110, support frame-121, strong spring-122, L-shaped connecting plate-123, anti-skid plate-124, assembly-61, filter cover-62, counterweight-63, connecting piece-64, rotating rod one-65, straight plate fan blade-66, curved fan blade-67, connecting frame-68, cleaning plate-69, base body-641, filter cloth-642, top cover-643, support seat-644, fixing frame-645, ball-646. DETAILED DESCRIPTION

[0031] The specific embodiments of the present application are described in further detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.

[0032] Please refer to Figures 1-4 The embodiment provides a foundation pit drainage device and method for foundation pit construction, which comprises a placing assembly 1, a water pump 2, a drainage pipe 3, a water suction pipe 4, a pipe clamp 5, and a anti-blocking assembly 6. The water pump 2 is fixed on the left end of the placing assembly 1 by bolts, and the water suction pipe 4 and the drainage pipe 3 are connected to the left and right ends of the water pump 2 respectively. The anti-blocking assembly 6 is locked and fixed with the water suction pipe 4 by the pipe clamp 5 at the top end. The placing assembly 1 comprises an L-shaped base plate 11, an anti-skid piece 12, a connecting channel 13, a support 14, a placing rod 15, a rotating rod 16, a connecting spring 17, a plug-in rod 18, a positioning plate 19, and a limiting opening 110. The anti-skid piece 12 is installed on the left end of the L-shaped base plate 11, and the connecting channel 13 is formed on the right end of the L-shaped base plate 11. The bottom end of the support 14 is fixed with the L-shaped base plate 11, the bottom end inside of the placing rod 15 is fixed with the rotating rod 16, the rotating rod 16 is rotatably connected with the support 14 and the positioning plate 19 respectively, the connecting spring 17 is installed in the rotating rod 16, the plug-in rod 18 is elastically connected with the rotating rod 16 by the connecting spring 17, and the positioning plate 19 is fixed on the front end of the L-shaped base plate 11. The plug-in rod 18 is embedded into the inside of the positioning plate 19.

[0033] In the embodiment, the front end of the positioning plate 19 is provided with the limiting opening 110, and the plug-in rod 18 is embedded into the inside of the limiting opening 110. Through the arrangement of the limiting opening 110, the plug-in rod 18 can be embedded and stabilized in the inside of the positioning plate 19, the positioning of the plug-in rod 18 is realized, and the plug-in rod 18, the rotating rod 16 and the placing rod 15 are fixed in the vertical direction. The rotating rod 16 is reset in the L-shaped base plate 11, thereby reducing the volume of the L-shaped base plate 11 and avoiding the risk of causing unsafe hidden troubles in the use process of the device, such as tripping the staff, collision, interfering with the carrying of other accessories and devices, etc.

[0034] In the embodiment, the cross section of the placing rod 15 is concave, which is convenient for folding and binding the drainage pipe 3 and the water suction pipe 4 in half and placing them in the placing rod 15 to realize stable support and avoid disengagement from the placing rod 15. The drainage pipe 3 and the water suction pipe 4 are flexible pipes, which can be folded in half into a sheet shape and then wound and bound.

[0035] In this embodiment, the placing rod 15 is provided with two groups, respectively used for placing the drain pipe 3 and the pumping pipe 4. When the device finishes pumping, the plug rod 18 is pulled outward to make it away from the limiting port 110, and the rotating rod 16 is rotated to the right to make the placing rod 15 rotate to the right, and then the pumping pipe 4 is folded into a sheet shape and wound around the placing rod 15, and the end of the pumping pipe 4 is rotated to the left end of the L-shaped base plate 11 to be placed together with the anti-blocking assembly 6 at the side of the water pump 2. After the pumping pipe 4 is stored, the drain pipe 3 part passing through the connecting channel 13 is folded into a sheet shape and wound around the other group of placing rods 15, so that the drain pipe 3 and the pumping pipe 4 are stored, and the water pump 2, the drain pipe 3, the pumping pipe 4 and the anti-blocking assembly 6 are integrally placed, which is convenient for use.

[0036] Please refer to Figure 5 The anti-skid member 12 includes a supporting frame 121, a strong spring 122, an L-shaped connecting plate 123 and an anti-skid plate 124. The bottom end of the supporting frame 121 is fixed to the L-shaped base plate 11, and the top end of the supporting frame 121 is provided with the strong spring 122. The top end of the L-shaped connecting plate 123 is elastically connected to the supporting frame 121 by the strong spring 122, and the bottom end of the L-shaped connecting plate 123 is fixed to the anti-skid plate 124.

[0037] Please refer to Figures 6-7 The anti-blocking assembly 6 includes an assembly body 61, a filter cover 62, a counterweight 63, a connecting piece 64, a rotating rod one 65, a straight plate fan blade 66, a curved fan blade 67, a connecting frame 68 and a cleaning plate 69. The assembly body 61 is locked and fixed to the pumping pipe 4 by the pipe clamp 5. The top end of the assembly body 61 is threadedly connected to the filter cover 62. The bottom end of the assembly body 61 is fixed to the counterweight 63. The connecting piece 64 is installed in the interior of the assembly body 61. The bottom end of the rotating rod one 65 is rotationally connected to the connecting piece 64. The outer side of the rotating rod one 65 is fixed to the straight plate fan blade 66 and the curved fan blade 67. The bottom end of the straight plate fan blade 66 is fixed to the curved fan blade 67. The left end of the connecting frame 68 is fixed to the straight plate fan blade 66, and the right end of the connecting frame 68 is fixed to the cleaning plate 69. The left end of the cleaning plate 69 is in contact with the assembly body 61.

[0038] In this embodiment, a plurality of circular holes are arranged on the rotating rod one 65 and the cleaning plate 69, and a plurality of protrusions are arranged on the inner side of the cleaning plate 69. The circular holes are arranged to reduce the water resistance during rotation, and the protrusions are arranged to clean the sludge on the outer side of the assembly body 61. The structure of the protrusions facilitates the quick scraping of the sludge on the outer side, avoids the excessive force when pushing all the sludge, and avoids the rotation of the cleaning plate 69 being hindered. Therefore, the protrusions are arranged at intervals to facilitate the pushing.

[0039] The bottom end inner side of the rotating rod one 65 and the top end outer side of the support base 644 are provided with circular arc-shaped sliding rails, and the fixing frame 645 and the ball 646 are movably arranged between the two groups of sliding rails.

[0040] In the embodiment, the rotating rod one 65 is light in mass, and is convenient to rotate under the impact of water flow. The curved fan blade 67 is arranged, so that the impact force in different directions drives the curved fan blade 67 to rotate when water flow rushes into the assembly body 61. The curved fan blade 67 is arranged to bear the impact force of water flow in a larger range in different directions, so that the curved fan blade 67 is rapidly rotated under the pushing of water flow, and finally the rapid cleaning of the sludge and impurities outside the assembly body 61 is realized, so as to avoid blockage. The curved fan blade 67 and the straight plate fan blade 66 do not hinder the pumping of accumulated water.

[0041] The top end of the base body 641 is provided with a circular ring through hole, so as to facilitate the rotation of the connecting frame 68 and the cleaning plate 69.

[0042] Please refer to Figure 8 The embodiment provides a foundation pit drainage device and method for foundation pit construction. The connecting piece 64 comprises a base body 641, filter cloth 642, a top cover 643, a support base 644, a fixing frame 645 and a ball 646. The bottom end of the base body 641 is fixed with the assembly body 61. The top end of the base body 641 is threadedly connected with the top cover 643. The bottom end of the support base 644 is fixed with the base body 641. The fixing frame 645 is internally provided with the ball 646. The left and right ends of the ball 646 are respectively in contact with the support base 644 and the rotating rod one 65.

[0043] In the embodiment, the side wall of the base body 641 is provided with two layers of inner and outer layers, and the filter cloth 642 is embedded in the inside of the two layers of side walls, so as to facilitate the sufficient filtration of accumulated water, and avoid that fine sand and other small substances enter the inside of the base body 641, affect the movement of the ball 646 and the fixing frame 645, or increase the friction between the rotating rod one 65 and the support base 644. The filter cloth 642 can be cotton cloth, non-woven fabric and other cloth materials to prevent solid particles from entering.

[0044] The application provides a foundation pit drainage device and method for foundation pit construction through improvement, and the working principle is as follows.

[0045] First: the device is installed on the foundation pit side by bolt, make it fixed, then take off one group of water pump 4 tied on the placing rod 15, and rely on the gravity of anti-blocking assembly 6 to make anti-blocking assembly 6 pull water pump 4 down into the bottom of the foundation pit, then take off another group of drainage pipe 3 tied on the placing rod 15, and expand, which can start the water pump 2 to extract the water in the foundation pit. The integrated water pump 2, water pump 4, drainage pipe 3 and anti-blocking assembly 6 can facilitate the rapid drainage, and when the drainage device is idle, the water pump 4, drainage pipe 3 and anti-blocking assembly 6 can not be disassembled, which realizes rapid use and rapid collection.

[0046] Second: before extraction, rotate the rotating rod 16 to the left, when the plug rod 18 moves to the limiting port 110, the connecting spring 17 is no longer stressed and is reset, pushing the plug rod 18 to embed in the limiting port 110, so that the rotating rod 16 is fixed. At this time, the placing rod 15 is perpendicular to the upper, and is reset to the inside of the L-shaped base plate 11, reducing the size of the device.

[0047] Third: during the process of water extraction, the water flows into the inside of the assembly body 61 under the action of suction, and under the action of suction and water flow impact, the curved fan blade 67, straight plate fan blade 66 and rotating rod one 65 are stressed to rotate, further driving the connecting frame 68 and cleaning plate 69 to rotate, so that the cleaning plate 69 scrapes the sludge and impurities outside the assembly body 61, avoiding the sludge and impurities from blocking the filter port of the assembly body 61, realizing the cleaning of the assembly body 61, thereby playing a role in preventing blockage, so that the water flows from the assembly body 61 and the filter cover 62 into the water pump 4, and finally flows out of the drainage pipe 3 to the other end, realizing the drainage of the foundation pit. In the process of rotating the rotating rod one 65, the friction of the rotating rod one 65 is greatly reduced under the influence of the ball 646, so that the rotating rod one 65 is more convenient to rotate under the action of water impact. The curved fan blade 67 is provided to increase the impact of water flow on the curved fan blade 67 when the water flow flows in, so that the curved fan blade 67 can be impacted by water flow from different directions, realizing the pushing of the curved fan blade 67, and the vertically arranged fan blade does not affect the extraction of water;

[0048] Fourth: when the foundation pit side is a mud ground, in order to avoid the slight vibration of the water pump 2 during operation, and to increase the friction with the mud ground when the water pump 2 moves on the mud ground, the L-shaped connecting plate 123 can be pressed down, so that the strong spring 122 is compressed, and the L-shaped connecting plate 123 is locked and fixed on the top end of the support frame 121 by bolt. At this time, the L-shaped connecting plate 123 and the anti-skid plate 124 move down, and the anti-skid plate 124 protrudes from the bottom surface of the L-shaped base plate 11, increasing the friction with the mud ground through the anti-skid plate 124, thereby improving the stability of the water pump 2 placed on the mud ground and avoiding its movement.

[0049] The above merely is the preferred embodiment of the present application, it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, can also make several improvements and replacements, these improvements and replacements also should be considered as the protection scope of the present application.

Claims

1. A foundation pit drainage device for foundation pit construction, characterized in that: Includes placement components (1), water pump (2), drain pipe (3), pumping pipe (4), pipe clamp (5), and anti-clogging components (6); The left end of the placement component (1) is bolted with a water pump (2), and the left and right ends of the water pump (2) are respectively connected to a water pumping pipe (4) and a drain pipe (3); The top of the anti-blocking component (6) is locked and fixed to the water pumping pipe (4) by a pipe clamp (5); The placement assembly (1) includes an L-shaped base plate (11), an anti-slip component (12), a connecting channel (13), a support (14), a placement rod (15), a rotating rod (16), a connecting spring (17), an insertion rod (18), a positioning plate (19), and a limiting port (110). The anti-slip component (12) is installed on the left end of the L-shaped base plate (11), and the connecting channel (13) is opened on the right end of the L-shaped base plate (11). The bottom end of the support (14) is connected to the L-shaped base plate (11). The bottom end of the placement rod (15) is fixed to the rotating rod (16). The rotating rod (16) is rotatably connected to the support (14) and the positioning plate (19). A connecting spring (17) is installed inside the rotating rod (16). The insertion rod (18) is elastically connected to the rotating rod (16) by the connecting spring (17). The positioning plate (19) is fixed to the front end of the L-shaped base plate (11). The insertion rod (18) is embedded backward into the interior of the positioning plate (19). The anti-slip component (12) includes a support frame (121), a strong spring (122), an L-shaped connecting plate (123), and an anti-slip plate (124). The bottom end of the support frame (121) is fixed to the L-shaped base plate (11), and a strong spring (122) is installed on its top end. The top end of the L-shaped connecting plate (123) is elastically connected to the support frame (121) by the strong spring (122), and the bottom end of the L-shaped connecting plate (123) is fixed with the anti-slip plate (124). The cross-section of the placement rod (15) is concave.

2. A foundation pit drainage device for foundation pit construction according to claim 1, characterized in that, The anti-clogging component (6) includes an assembly (61), a filter cover (62), a counterweight (63), a connector (64), a rotating rod (65), a straight fan blade (66), a curved fan blade (67), a connecting frame (68), and a cleaning plate (69). The assembly (61) is locked and fixed to the water pipe (4) by a pipe clamp (5). The top of the assembly (61) is threaded with the filter cover (62), and the bottom of the assembly (61) is fixed with the counterweight (63). The connector (64) is... 4) Installed inside the assembly (61), the bottom end of the rotating rod (65) is rotatably connected to the connector (64). The outer side of the rotating rod (65) is fixed with a straight fan blade (66) and a curved fan blade (67). The bottom end of the straight fan blade (66) is fixed to the curved fan blade (67). The left end of the connecting frame (68) is fixed to the straight fan blade (66), and its right end is fixed to the cleaning plate (69). The left end of the cleaning plate (69) is in contact with the assembly (61).

3. A foundation pit drainage device for foundation pit construction according to claim 2, characterized in that, The connector (64) includes a base (641), a filter cloth (642), a top cover (643), a support base (644), a fixing frame (645), and a ball bearing (646). The bottom end of the base (641) is fixed to the assembly (61), and the top end of the base (641) is threadedly connected to the top cover (643). The bottom end of the support base (644) is fixed to the base (641). The ball bearing (646) is installed inside the fixing frame (645), and the left and right ends of the ball bearing (646) are in contact with the support base (644) and the rotating rod (65) respectively.

4. A foundation pit drainage device for foundation pit construction according to claim 1, characterized in that, The positioning plate (19) has a limiting port (110) at its front end, and a plug (18) is embedded inside the limiting port (110).

5. A foundation pit drainage device for foundation pit construction according to claim 3, characterized in that, The sidewall of the substrate (641) has inner and outer layers, and filter cloth (642) is embedded inside the two sidewall layers.

6. A foundation pit drainage device for foundation pit construction according to claim 2, characterized in that, The rotating rod (65) and the cleaning plate (69) are provided with multiple sets of circular through holes, and the inner side of the cleaning plate (69) is provided with multiple sets of protrusions.

7. A foundation pit drainage device for foundation pit construction according to claim 2, characterized in that, The inner bottom of the rotating rod (65) and the outer top of the support (644) are both provided with arc-shaped slide rails, and a fixed frame (645) and a ball bearing (646) are movable between the two sets of slide rails.

8. A method for a foundation pit drainage device for foundation pit construction according to any one of claims 1-7, characterized in that, Includes the following steps: Step S1: Install the device on the side of the pit with bolts to fix it. Then remove the water pipe (4) wrapped around one of the placement rods (15) and use the weight of the anti-blocking component (6) to pull the water pipe (4) down into the bottom of the pit. Then remove the drainage pipe (3) wrapped around the other placement rod (15) and unfold it. Then the water pump (2) can be started to pump out the water inside the pit. Step S2: Before extraction, rotate the rotating rod (16) to the left. When the insertion rod (18) moves to the limiting port (110), the connecting spring (17) is no longer squeezed and resets, pushing the insertion rod (18) into the limiting port (110), thereby fixing the rotating rod (16). At this time, the placement rod (15) is vertically upward and resets to the inside of the L-shaped base plate (11), reducing the size of the device. Step S3: During the process of pumping out the accumulated water, the accumulated water rushes into the interior of the assembly (61) under the action of suction. Under the action of suction and water flow impact, the curved fan blade (67), the straight fan blade (66), and the rotating rod (65) are rotated, which in turn drives the connecting frame (68) and the cleaning plate (69) to rotate. The cleaning plate (69) scrapes away the silt and impurities on the outside of the assembly (61), preventing the silt and impurities from clogging the filter port of the assembly (61) and cleaning the assembly (61), thereby playing a role in preventing blockage. The accumulated water enters the pumping pipe (4) from the pit through the filtration of the assembly (61) and the filter cover (62), and finally flows out to the other end through the drain pipe (3), realizing the drainage of the pit. In addition, during the rotation of the rotating rod (65), the friction force on the rotating rod (65) is greatly reduced due to the influence of the ball (646), which makes it easier for the rotating rod (65) to rotate under the impact of water. Step S4: When the edge of the pit is muddy ground, in order to avoid the slight vibration during the operation of the water pump (2) causing the water pump (2) to move on the muddy ground, in order to increase the frictional force in contact with the muddy ground, the L-shaped connecting plate (123) can be pressed down to compress the strong spring (122), and the L-shaped connecting plate (123) can be locked and fixed to the top of the support frame (121) with bolts. At this time, the L-shaped connecting plate (123) and the anti-slip plate (124) move down, and the anti-slip plate (124) protrudes from the bottom surface of the L-shaped base plate (11). The friction with the muddy ground is increased by the anti-slip plate (124), thereby improving the stability of the water pump (2) placed on the muddy ground and preventing it from moving.

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