A light well point dewatering device

Abstract

The utility model relates to the technical field of foundation pit construction, disclose a kind of light well point precipitation device, including pumping main pipe, well point pipe, pumping pump;Pumping main pipe includes first straight pipe, second straight pipe, third straight pipe, fourth straight pipe, first straight pipe one end is closed, and the other end is detachably connected with second straight pipe by thread, fourth straight pipe one end is closed, and the other end is detachably connected with third straight pipe by thread, second straight pipe and third straight pipe are detachably connected by thread between, and the connecting place of second straight pipe and third straight pipe also is communicated with pumping pump. The utility model connects the first straight pipe, second straight pipe, third straight pipe, fourth straight pipe of pumping main pipe by thread with the way of repeatable disassembly and assembly by splitting, so that the disassembly construction of pumping main pipe is convenient and fast, time-saving and labor-saving, construction efficiency is high, need not cutting pipe when dismantling, avoid the damage to pipe, all pipes can be reused, can effectively reduce material cost.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit construction technology, specifically, it relates to a lightweight wellpoint dewatering device. Background Technology

[0002] During the construction of foundation pits in building projects, in areas with high groundwater levels, the foundation pit locations are often situated in soft, moist silty clay soil layers with high water content. This means the foundation bearing capacity may not meet the design specifications, necessitating groundwater level control. Existing wellpoint dewatering devices involve spaced wellpoint pipes around the perimeter of the foundation pit. A filter pipe with perforated holes is connected to the bottom of each wellpoint pipe and inserted into the permeable layer. The upper part of the wellpoint pipes is connected to a main collection pipe, allowing a pump to draw water through the main collection pipe and the wellpoint pipes to achieve wellpoint dewatering.

[0003] Existing wellpoint dewatering devices typically use metal pipes connected by flanges or PVC pipes connected by heat fusion for their main water collection pipes. However, metal pipes are expensive and heavy, making disassembly and assembly difficult and resulting in low construction efficiency. Heat fusion connections for PVC pipes are time-consuming and labor-intensive, with low construction efficiency. Furthermore, the pipes need to be cut during disassembly, and the pipes are difficult to reuse after multiple cuts. In addition, when the filter pipe at the lower end of the wellpoint pipe is damaged, mud and sand will be pumped out at the same time, which can easily damage the water pump. Utility Model Content

[0004] To address or partially address the problems existing in related technologies, this utility model provides a lightweight wellpoint dewatering device, aiming to solve the problems of difficult disassembly and assembly, low construction efficiency, and damage to the water pump caused by the extraction of mud and sand due to damage to the filter pipe.

[0005] This application provides a lightweight wellpoint dewatering device, including a main pumping pipe, wellpoint pipes, and a pumping pump. Several wellpoint pipes are connected to the main pumping pipe. The wellpoint pipes are spaced around the foundation pit and inserted into the permeable layer. The main pumping pipe is connected to the pumping pump.

[0006] The main pumping pipe includes a first straight pipe, a second straight pipe, a third straight pipe, and a fourth straight pipe arranged in a rectangular pattern around the foundation pit. One end of the first straight pipe is closed, and the other end is detachably connected to the second straight pipe via a thread. One end of the fourth straight pipe is closed, and the other end is detachably connected to the third straight pipe via a thread. The second straight pipe and the third straight pipe are detachably connected via a thread, and the connection between the second straight pipe and the third straight pipe is also connected to a pump.

[0007] The first, second, third, and fourth straight pipes are connected to several branch pipes on the side facing the foundation pit. Each branch pipe is detachably connected to a wellpoint pipe via a thread. A filter section is set at the bottom of the wellpoint pipe. The filter section is closed at the end and has several permeable holes on its side wall. A filter screen is detachably fixed to the outside of the filter section by binding wire, and the filter screen covers each permeable hole.

[0008] In one alternative, the first straight pipe is closed at one end and has a first straight connector fixedly installed at the other end; the second and third straight pipes are both fixedly installed with first straight connectors at both ends; and the fourth straight pipe is closed at one end and has a first straight connector fixedly installed at the other end.

[0009] The first straight pipe is connected to the second straight pipe and the third straight pipe is connected to the fourth straight pipe via a first elbow joint. The first straight pipe is connected to the third straight pipe via a tee joint. The other end of the tee joint is connected to the water pump.

[0010] In one alternative, a second direct connector is fixedly installed at the end of the branch pipe and at the upper end of the wellpoint pipe. The second direct connector between the wellpoint pipe and the branch pipe is connected by a union hose.

[0011] In one alternative, the filter section of the wellpoint pipe is constructed with radially recessed positioning grooves at both ends, and the filter screen is tied with binding wire inside the positioning grooves.

[0012] In one alternative, the first, second, third, and fourth straight pipes are each installed off the ground via at least two support frames, with the height of the support frames exceeding the height of the branch pipes.

[0013] In one alternative, a landfill layer extending to the ground is injected around the wellpoint pipe. The landfill layer consists of a gravel layer and a clay layer injected sequentially from bottom to top, and the height of the gravel layer is not less than the height of the filter section.

[0014] The beneficial effects of this utility model are:

[0015] This invention disassembles the main pumping pipe into four straight pipes—a first, a second, a third, and a fourth—that can be reconnected via threads, making the disassembly and assembly of the main pumping pipe convenient, quick, time-saving, labor-saving, and highly efficient. Disassembly eliminates the need to cut the pipes, avoiding damage, and all pipes are reusable, effectively reducing material costs. Furthermore, by installing a replaceable filter screen at the water inlet of the wellpoint pipe, the filter screen can be replaced periodically or promptly after wear, ensuring its filtration performance. During a single wellpoint dewatering operation, the effectiveness of filtering groundwater entering the wellpoint pipe is guaranteed, effectively preventing large particles of sediment from entering the wellpoint pipe and damaging the pump.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a top view and layout diagram of the pumping main pipe and well point pipe in one embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the installation of the main pumping pipe on the support frame and the installation of the well point pipe outside the foundation pit in one embodiment of this application;

[0020] Figure 3 This is a partial front sectional view of the filter section of the wellpoint pipe in one embodiment of this application.

[0021] The following are the reference numerals in the attached diagram: 100-Foundation pit; 1-Main pumping pipe; 10-Branch pipe; 11-First straight pipe; 12-Second straight pipe; 13-Third straight pipe; 14-Fourth straight pipe; 15-First straight connector; 16-First elbow connector; 17-Tee connector; 2-Well point pipe; 21-Filter section; 211-Permeable hole; 212-Positioning groove; 3-Pump; 4-Binding wire; 5-Filter screen; 6-Second straight connector; 7-Hose with union; 8-Support frame; 9-Backfill layer; 91-Gravel layer; 92-Clay layer. Detailed Implementation

[0022] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application. Similarly, the following examples are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0027] To address the aforementioned problems, this application proposes improvements and innovations, including the following embodiments.

[0028] In one implementation, please refer to Figure 1 , Figure 2 , Figure 3This application provides a lightweight wellpoint dewatering device, including a main pumping pipe 1, wellpoint pipes 2, and a pumping pump 3. Several wellpoint pipes 2 are connected to the main pumping pipe 1. The wellpoint pipes 2 are spaced around the foundation pit and inserted into the permeable layer. The main pumping pipe 1 is connected to the pumping pump 3. The main pumping pipe 1 includes a first straight pipe 11, a second straight pipe 12, a third straight pipe 13, and a fourth straight pipe 14 arranged in a rectangular pattern around the foundation pit 100. The first straight pipe 11, the second straight pipe 12, the third straight pipe 13, and the fourth straight pipe 14 are made of PVC pipes. One end of the first straight pipe 11 is closed and the other end is detachably connected to the second straight pipe 12 by a thread. One end of the fourth straight pipe 14 is closed and the other end is detachably connected to the third straight pipe 13 by a thread. The second straight pipe 12 and the third straight pipe 13 are detachably connected by a thread, and the connection between the second straight pipe 12 and the third straight pipe 13 is also connected to the pumping pump 3.

[0029] The first straight pipe 11 is closed at one end and fixedly installed with a first straight connector 15 at the other end. The second straight pipe 12 and the third straight pipe 13 are both fixedly installed with first straight connectors 15 at both ends. The fourth straight pipe 14 is closed at one end and fixedly installed with a first straight connector 15 at the other end. The first straight connectors 15 between the first straight pipe 11 and the second straight pipe 12, and between the third straight pipe 13 and the fourth straight pipe 14, are respectively connected by a first elbow joint 16. The first straight connector 15 between the second straight pipe 12 and the third straight pipe 13 is connected by a tee joint 17. A first straight connector 15 is installed at the end of the inlet pipe of the water pump 3. The other end of the tee joint 17 is connected to the water pump 3. Specifically, the first straight connector 15 is an internal thread straight connector, and the first straight connector 15 is pre-fixed to each straight pipe by heat fusion. Correspondingly, the first elbow joint 16 is a double-ended external thread elbow joint with two interfaces matching the first straight connector 15, and the tee joint 17 is an external thread tee joint with three interfaces matching the first straight connector 15.

[0030] Thus, by disassembling the main water supply pipe 1 into a first straight pipe 11, a second straight pipe 12, a third straight pipe 13, and a fourth straight pipe 14 that can be connected by threads in a reusable disassembly and reassembly manner, the disassembly and assembly of the main water supply pipe 1 is convenient, quick, time-saving, labor-saving, and highly efficient. No pipe cutting is required during disassembly, avoiding damage to the pipes. All pipes can be reused, effectively reducing material costs. Compared with existing technologies, this avoids the problem of difficult disassembly and assembly due to the weight of metal pipes, and also avoids the time-consuming and laborious heat fusion connection and pipe cutting required for disassembly of PVC pipes.

[0031] Furthermore, in this embodiment, by connecting the water pump 3 to the connection between the second straight pipe 12 and the third straight pipe 13, the lengths of the main water pumping pipe 1 on both sides of the water pump 3 are equal. This effectively reduces the vacuum attenuation of the well point pipes 2 on both sides of the water pump 3, thereby effectively improving the extraction effect of groundwater around the foundation pit. It can also effectively alleviate the problem of severe vacuum attenuation in the well point pipes 2 far from the water pump 3 when the water pump 3 is located at the end of the main water pumping pipe 1, which leads to a decrease in pumping capacity.

[0032] Specifically, when installing the main water supply pipe 1, firstly, place the first straight pipe 11, the second straight pipe 12, the third straight pipe 13, and the fourth straight pipe 14 on the support frame 8 respectively. Then, connect the tee connector 17 to the first straight connector 15 at the end of the water inlet pipe of the water pump 3. Next, rotate the second straight pipe 12 to connect it to the tee connector 17, and rotate the third straight pipe 13 to connect it to the tee connector 17. Then, install the first elbow connector 16 at the other end of the second straight pipe 12 and the third straight pipe 13 respectively. Finally, rotate the first straight pipe 11 to connect it to the corresponding first elbow connector 16, and rotate the fourth straight pipe 14 to connect it to the corresponding first elbow connector 16.

[0033] In this embodiment, the first straight pipe 11, the second straight pipe 12, the third straight pipe 13, and the fourth straight pipe 14 are each connected to a number of branch pipes 10 on the side facing the foundation pit 100. Each branch pipe 10 has a wellpoint pipe 2 detachably connected to its end via threads. The wellpoint pipe 2 is made of PVC pipe. A second direct connector 6 is fixedly installed at the end of each branch pipe 10, and a second direct connector 6 is fixedly installed at the upper end of each wellpoint pipe 2. The second direct connectors 6 between the wellpoint pipe 2 and the branch pipe 10 are connected via a flexible union 7. Specifically, the two second direct connectors 6 are external threaded connectors, and the flexible union 7 is a double-ended flexible union 7 with internal threaded nuts at both ends that can match the second direct connectors 6. After each wellpoint pipe 2 and each straight pipe of the main pumping pipe 1 is installed in place, the wellpoint pipe 2 can be connected to the main pumping pipe 1 by engaging the internal threaded nuts at both ends of the flexible union 7 with the two second direct connectors 6.

[0034] In this way, by connecting the well point pipe 2 with the first straight pipe 11, the second straight pipe 12, the third straight pipe 13, and the fourth straight pipe 14 through threads in a reusable disassembly and assembly manner, the disassembly and assembly of the well point pipe 2 and the main pumping pipe 1 is convenient, quick, time-saving, labor-saving, and highly efficient. No pipe cutting is required during disassembly, thus avoiding damage to the pipe. All well point pipes 2 can be reused, which can effectively reduce material costs.

[0035] In this embodiment, a filter section 21 is provided at the lower part of the well point pipe 2. The end of the filter section 21 is closed and a number of water permeable holes 211 are constructed on the side wall. A filter screen 5 is detachably fixed and tied around the filter section 21 by a binding wire 4. The filter screen 5 covers each water permeable hole 211.

[0036] Thus, for the water intake section of the wellpoint pipe 2, a filter section 21 with permeable holes 211 is set up, and each permeable hole 211 is covered with a filter screen 5. The filter screen 5 is detachably installed on the filter section 21 using binding wire 4. Compared with the existing technology of connecting a filter pipe with filter holes at the bottom of the wellpoint pipe 2, the filter screen 5 can be replaced regularly or promptly after wear, thereby ensuring the filtration performance of the filter screen 5. During a single wellpoint dewatering operation, the filtration effectiveness of the groundwater entering the wellpoint pipe 2 can be guaranteed, thereby effectively preventing large particles of silt from entering the wellpoint pipe 2 and damaging the pump. Moreover, replacing the filter screen 5 is simple and convenient, without the need to replace the entire wellpoint pipe 2, which can effectively reduce material costs.

[0037] In some embodiments, the filter section 21 of the wellpoint pipe 2 is provided with radially recessed positioning grooves 212 at both ends, and the binding wire 4 is used to bind the filter screen 5 within the positioning grooves 212. In this way, the axial position of the binding wire 4 on the filter section 21 can be positioned by the positioning grooves 212, thereby preventing the filter screen 5 from falling off during the installation and removal of the wellpoint pipe 2. In specific applications, the filter screen 5 is made of non-woven fabric or nylon mesh, and the binding wire 4 is made of galvanized steel wire, copper-clad steel wire, or black iron wire.

[0038] In some embodiments, the first straight pipe 11, the second straight pipe 12, the third straight pipe 13, and the fourth straight pipe 14 are each installed off the ground via at least two support frames 8, with the height of the support frames 8 being higher than the height of the branch pipe 10. This avoids the situation where the straight pipes are difficult to rotate when placed directly on the ground, thereby facilitating the assembly and disassembly of the straight pipes and pipe fittings.

[0039] In some embodiments, a landfill layer 9 extending to the ground surface is injected around the wellpoint pipe 2. The landfill layer 9 includes a gravel layer 91 and a clay layer 92 injected sequentially from bottom to top, and the height of the gravel layer 91 is not lower than the height of the filter section 21. In this way, a highly permeable area can be formed within the filter section 21 through the gravel layer 91, which facilitates the smooth flow of groundwater through the gravel layer 91 and into the wellpoint pipe 2 via the filter screen 5. At the same time, the gravel layer 91 effectively blocks fine particles in the soil surrounding the filter section 21; the clay layer 92 effectively seals the annular gap around the wellhead of the wellpoint pipe 2, thereby preventing air from entering and ensuring that the pump 3 acts on the underground aquifer, thereby efficiently extracting groundwater to achieve the purpose of wellpoint dewatering.

[0040] Finally, it should be noted that although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, all of which should be included within the protection scope of this application.

Claims

1. A lightweight wellpoint dewatering device, comprising a main pumping pipe (1), wellpoint pipes (2), and a pumping pump (3), wherein a plurality of wellpoint pipes (2) are connected to the main pumping pipe (1), the wellpoint pipes (2) are spaced apart around the foundation pit and inserted into the permeable layer, and the main pumping pipe (1) is connected to the pumping pump (3), characterized in that: The main pumping pipe (1) includes a first straight pipe (11), a second straight pipe (12), a third straight pipe (13), and a fourth straight pipe (14) arranged in a rectangular pattern around the foundation pit (100). One end of the first straight pipe (11) is closed, and the other end is detachably connected to the second straight pipe (12) by a thread. One end of the fourth straight pipe (14) is closed, and the other end is detachably connected to the third straight pipe (13) by a thread. The second straight pipe (12) and the third straight pipe (13) are detachably connected by a thread, and the connection between the second straight pipe (12) and the third straight pipe (13) is also connected to the pumping pump (3). The first straight pipe (11), the second straight pipe (12), the third straight pipe (13), and the fourth straight pipe (14) are connected to several branch pipes (10) on the side facing the foundation pit (100). The end of each branch pipe (10) is detachably connected to a well point pipe (2) by a thread. A filter section (21) is provided at the lower part of the well point pipe (2). The end of the filter section (21) is closed and several permeable holes (211) are constructed on the side wall. A filter screen (5) is detachably fixed and tied around the filter section (21) by a binding wire (4). The filter screen (5) covers each of the permeable holes (211).

2. The lightweight wellpoint dewatering device according to claim 1, characterized in that: The first straight pipe (11) is closed at one end and a first direct head (15) is fixedly installed at the other end. The second straight pipe (12) and the third straight pipe (13) are both fixedly installed with the first direct head (15). The fourth straight pipe (14) is closed at one end and a first direct head (15) is fixedly installed at the other end. The first straight pipe (11) and the second straight pipe (12), and the first straight pipe (13) and the fourth straight pipe (14) are connected by a first elbow joint (16). The first straight pipe (15) between the second straight pipe (12) and the third straight pipe (13) is connected by a tee joint (17). The other end of the tee joint (17) is connected to the water pump (3).

3. The lightweight wellpoint dewatering device according to claim 1 or 2, characterized in that: The branch pipe (10) is fixedly installed with a second direct head (6), and the well point pipe (2) is fixedly installed with a second direct head (6). The second direct head (6) between the well point pipe (2) and the branch pipe (10) is connected by a union hose (7).

4. The lightweight wellpoint dewatering device according to claim 1, characterized in that: The filter section (21) of the well point pipe (2) has radially recessed positioning grooves (212) at both ends, and the binding wire (4) binds the filter screen (5) in the positioning grooves (212).

5. The lightweight wellpoint dewatering device according to claim 1, characterized in that: The first straight pipe (11), the second straight pipe (12), the third straight pipe (13), and the fourth straight pipe (14) are respectively installed off the ground by at least two support frames (8), and the height of the support frame (8) is higher than the height of the branch pipe (10).

6. The lightweight wellpoint dewatering device according to claim 1, characterized in that: The well point pipe (2) is surrounded by a landfill layer (9) extending to the ground. The landfill layer (9) includes a gravel layer (91) and a clay layer (92) injected from bottom to top, and the height of the gravel layer (91) is not lower than the height of the filter section (21).

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