Pumping devices for foundation pit dewatering

Abstract

A pumping device for dewatering foundation pits includes a fixed base at the top of the pit, a support frame and a first support on the fixed base, an inclined support rod on the first support, a fixed pulley at the end of the support rod, a rope sheave mounted on the support frame, and a rope sheave axle connected to the output shaft of a servo motor on the outside of the support frame. A pull rope is wound around the rope sheave, with its free end passing over the fixed pulley and connected to a pump. The pump is located inside the pit, and its outlet end has a water outlet pipe extending out of the pit to drain water. The pull rope is wound and extended by the servo motor to adjust the distance the pump extends into the pit. The distance between the pump and the inner wall of the pit is controlled by the swing angle of the support rod, thus preventing the pump from scraping against the ground during its lifting and lowering within the pit. A filter is installed at the inlet of the pump to prevent debris from entering the pump and causing malfunctions.

Description

Technical Field

[0001] This utility model belongs to the technical field of foundation pit dewatering equipment, specifically relating to a pumping device for foundation pit dewatering. Background Technology

[0002] Dewatering of a foundation pit refers to the work done when the groundwater level is higher than the bottom of the excavation pit during excavation. Groundwater will continuously seep into the pit. In order to ensure that the foundation pit can be constructed under dry conditions and to prevent slope instability, quicksand in the foundation, pit bottom heave, piping at the bottom of the pit, and a decrease in the bearing capacity of the foundation, pumping devices are often used to extract water from the foundation pit, thereby lowering the water level in the foundation pit.

[0003] The water level is typically lowered to a depth of 3-6m in the foundation pit. If a depth greater than 6m is required, a rope is usually placed on the bank to pull the water pump into the pit to lower the water level. However, this process is time-consuming and labor-intensive, and the pump is prone to scraping against the pit wall during its raising and lowering, which can damage the pump. Furthermore, the frequent scraping can cause the pit wall to collapse. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a pumping device for foundation pit dewatering that is reasonably designed, simple in structure, and low in cost.

[0005] The technical solution adopted to solve the above technical problems is: a pumping device for dewatering foundation pits, wherein a fixed base is set at the top of the foundation pit, a bracket and a first support are set on the fixed base, a support rod is inclinedly set on the first support, a fixed pulley is set at the end of the support rod, a rope wheel is installed on the bracket, the axle of the rope wheel is connected to the output shaft of a servo motor on the outside of the bracket, a pull rope is wound on the rope wheel and the free end passes around the fixed pulley and is connected to a pumping pump, the pumping pump is located in the foundation pit, and a water outlet pipe is set at the water outlet end of the pumping pump, the water outlet pipe extends out of the foundation pit to drain water.

[0006] The fixed base of this utility model is provided with a second hinge support, and the lower part of the support rod is provided with a third hinge support. A telescopic support is provided between the second hinge support and the third hinge support.

[0007] The retractable support component of this utility model is an electric push rod or a hydraulic push rod.

[0008] The first support and the support rod of this utility model are hinged.

[0009] The fixed base of this utility model is provided with four sets of universal wheels at the four corners of its bottom, and the universal wheels are equipped with a braking function.

[0010] The fixed base of this utility model has at least two sets of through holes, which are used in conjunction with steel rods to limit the fixed base.

[0011] The water pump of this invention is equipped with a filter device at its inlet end.

[0012] The filtration device of this utility model is as follows: a circular mounting bracket is connected to the outlet flange of the water pump, and a filter screen is installed on the mounting bracket.

[0013] This invention employs a fixed base positioned at the edge of the pit's top surface. A support rod capable of swinging up and down is mounted on the fixed base. A pulley at the end of the support rod suspends a rope, and a water pump is located at the bottom of the rope. The rope is driven by a servo motor to extend and retract, adjusting the distance the water pump extends into the pit. The swing angle of the support rod controls the distance between the water pump and the inner wall of the pit, preventing the water pump from scraping against surfaces during its ascent and descent within the pit. A filter is installed at the water pump's inlet to prevent debris from entering the pump and causing malfunctions. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0015] Figure 2 yes Figure 1 A schematic diagram of the structure of the intermediate filter device 15.

[0016] Figure 3 yes Figure 1 A schematic diagram of the connection of the retractable support 10.

[0017] In the diagram: 1. Fixed base; 2. Pull rope; 3. Universal wheel; 4. Servo motor; 5. Rope winding wheel; 6. Fixed pulley; 7. Support rod; 8. First hinge support; 9. Second hinge support; 10. Telescopic support; 11. Third hinge support; 12. Foundation pit; 13. Lock; 14. Water pump; 15. Filter device; 16. Water pipe; 15-1. Mounting bracket; 15-2. Filter screen. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but the present invention is not limited to these embodiments.

[0019] Example 1

[0020] exist Figure 1 , 2In section 3, the pumping device for dewatering foundation pits involved in this utility model has a fixed base 1 at the top of the foundation pit 12. The fixed base 1 can be fixedly installed at the top of the foundation pit 12 or it can be movable. In this embodiment, four sets of universal wheels 3 are provided at the four corners of the bottom of the fixed base 1. The universal wheels 3 have a braking function. When pumping is required, the fixed base 1 is pushed to the operating surface, and the universal wheels 3 brake to perform the operation. In order to further ensure stability, at least two sets of through holes can be machined on the fixed base 1. When in use, the fixed base 1 is limited with the help of steel bars. The fixed base 1 is equipped with universal wheels 3 for easy movement.

[0021] A bracket is installed in the middle of the fixed base 1, and a first support 8 is installed on the right side of the bracket. A support rod 7 is installed obliquely on the first support 8, and a fixed pulley 6 is provided at the end of the support rod 7. In this embodiment, the first support 8 and the support rod 7 are hinged together, and the support rod 7 can rotate vertically around the first support 8. A second hinge support 9 is installed on the right side of the first support 8 on the fixed base 1, and a third hinge support 11 is provided at the lower part of the support rod 7. A telescopic support member 10 is provided between the second hinge support 9 and the third hinge support 11. The two ends of the telescopic support member 10 are connected to the second hinge support 9 and the third hinge support 11 respectively by pins. The telescopic support member 10 is an electric push rod or a hydraulic push rod. The angle between the support rod 7 and the horizontal plane is adjusted by the telescopic support member 10, thereby adjusting the distance between the water pump and the side wall of the pit 12, preventing the water pump 14 from colliding with the side wall of the pit 12 during operation.

[0022] The rope wheel 5 is mounted on the bracket. The axle of the rope wheel 5 is connected to the output shaft of the servo motor 4 mounted on the outside of the bracket. The servo motor 4 is a servo motor with a self-locking function. In practice, if the water pump 14 is too heavy or the pit 12 is deep enough, the self-locking performance of the servo motor 4 may be insufficient. Alternatively, a ratchet check mechanism or other self-locking device in the prior art can be added. The pull rope 2 is wound on the rope wheel 5 and its free end passes around the fixed pulley 6 and is connected to the water pump 14. The servo motor 4 is operated to control the pulling rope 2 to extend and retract, thereby controlling the height of the water pump 14 from the bottom of the pit. The water pump 14 is provided with a water outlet pipe 16, which extends out of the pit 12 to drain water. The water pump 14 is equipped with a filter device 15 at its inlet end. Specifically, the filter device 15 consists of a mounting frame 15-1 and a filter screen 15-2. The annular mounting frame 15-1 is connected to the outlet flange of the water pump 14. The filter screen 15-2 is installed on the mounting frame 15-1 to prevent debris in the pit 12 from entering the water pump 14 and causing malfunction.

Claims

1. A water pumping device for dewatering a foundation pit, characterized by: The fixed base (1) is arranged on the top of the foundation pit (12), the fixed base (1) is provided with a support and a first support (8), the first support (8) is provided with a support rod (7) in an inclined manner, the end of the support rod (7) is provided with a fixed pulley (6), a winding pulley (5) is arranged on the support, the wheel shaft of the winding pulley (5) is connected with the output shaft of the servo motor (4) outside the support, a pull rope (2) is wound on the winding pulley (5) and the free end of the pull rope (2) is connected with the water pump (14) through the fixed pulley (6), the water pump (14) is arranged in the foundation pit (12), the water outlet end of the water pump (14) is provided with a water outlet pipe (16), and the water outlet pipe (16) extends out of the foundation pit (12) to drain water.

2. The water pumping device for foundation pit dewatering according to claim 1, characterized in that: The fixed base (1) is provided with a second hinge support (9), the lower part of the support rod (7) is provided with a third hinge support (11), and the second hinge support (9) and the third hinge support (11) are provided with a telescopic support (10).

3. The water pumping device for foundation pit dewatering according to claim 2, characterized in that: The telescopic support (10) is an electric push rod or a hydraulic push rod.

4. The water pumping device for foundation pit dewatering according to claim 2, characterized in that: The first support (8) and the support rod (7) are hinged.

5. The water pumping device for foundation pit dewatering according to claim 1, characterized in that: Four groups of universal wheels (3) are arranged at the bottom of the fixed base (1), and the universal wheels (3) are provided with a brake function.

6. The water pumping device for foundation pit dewatering according to claim 5, characterized in that: At least two groups of through holes are formed in the fixed base (1), and the fixed base (1) is limited by the steel drill.

7. The water pumping device for foundation pit dewatering according to claim 1, characterized in that: The water inlet end of the water pump (14) is provided with a filter device (15).

8. The water pumping device for foundation pit dewatering according to claim 7, characterized in that The filter device (15) is that a circular ring-shaped mounting bracket (15-1) is connected with the water outlet end flange plate of the water pump (14), and a filter screen (15-2) is arranged on the mounting bracket (15-1).

Images