Device for controlling water level in foundation pit dewatering

Abstract

The utility model discloses a device for controlling water level in foundation pit dewatering, which comprises a water pump arranged at a position close to the bottom in a dewatering well for foundation pit dewatering; one end of the water pumping pipe is connected to the output end of the water pump, and the other end extends out of the dewatering well; the water pump control module is arranged outside the dewatering well; the electric signal wire harness comprises a first electric signal wire, a second electric signal wire and a third electric signal wire, one ends of the first electric signal wire, the second electric signal wire and the third electric signal wire are located in the precipitation well, the other end of the first electric signal wire is connected with one end of the water pump control module, and the other ends of the second electric signal wire and the third electric signal wire are connected with the other end of the water pump control module; a conductive contact located below the natural water line in the dewatering well is arranged at the position, close to one end, of the first electric signal line, and a conductive contact located at the lower limit of the water line in the dewatering well is arranged at the position, close to one end, of the second electric signal line. A conductive contact located at the upper limit of the water line in the dewatering well is arranged at the position, close to one end, of the third electrical signal line; the natural waterline is lower than the waterline lower limit; one end of the water pump cable is connected with the electric signal input end of the water pump, and the other end is connected with the water pump control module. The device is suitable for the environment with narrow and complex precipitation well space, and can automatically control the water level according to the up-and-down line of the actually set water level.

Description

Technical Field

[0001] This utility model relates to the technical field of foundation pit dewatering control equipment, specifically a device for controlling water level during foundation pit dewatering. Background Technology

[0002] In the field of construction engineering, foundation pit dewatering is a crucial step in ensuring construction safety. As the space formed after the foundation excavation, controlling the water level within the foundation pit is critical to prevent water accumulation that could lead to decreased soil stability, pit collapse, or ground subsidence. During foundation pit dewatering, water pumps are typically used, and changes in the water level within the wells need to be continuously and accurately monitored to prevent damage to the pumps due to prolonged operation or dry running. Traditional methods often require constant manual monitoring, which not only increases labor costs but also increases the risk of safety hazards due to human negligence.

[0003] To overcome the problem of constant manual monitoring and to save electricity and improve energy efficiency, construction sites generally adopt automatic control strategies. This involves the pump automatically starting to pump water when the water level in the dewatering well rises to a preset height, and automatically stopping when the water level drops to a certain level. However, existing water level monitoring methods typically use float sensors, which are often unsuitable for the confined and complex environment of dewatering wells, limiting the reliability of the automated control system. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a device for controlling the water level during foundation pit dewatering. It is suitable for environments with small and complex dewatering well spaces and can automatically control the water level according to the actual set upper and lower water level lines.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] According to a first aspect of the present invention, a device for controlling water level during foundation pit dewatering is provided, comprising:

[0007] The water pump is located near the bottom of the dewatering well used for dewatering the foundation pit;

[0008] A pumping pipe, one end of which is connected to the output end of the water pump, and the other end of which extends out of the dewatering well;

[0009] A water pump control module is located outside the dewatering well;

[0010] The electric signal wire bundle comprises a first electric signal wire, a second electric signal wire and a third electric signal wire, one end of each of the electric signal wires is located in the precipitation well, the other end of the first electric signal wire is connected with one end of the water pump control module, and the other end of the second electric signal wire and the third electric signal wire is connected with the other end of the water pump control module; a conductive contact point located below the natural water level in the precipitation well is arranged on the first electric signal wire close to one end, a conductive contact point located at the lower limit of the water level in the precipitation well is arranged on the second electric signal wire close to one end, and a conductive contact point located at the upper limit of the water level in the precipitation well is arranged on the third electric signal wire close to one end; the natural water level is lower than the lower limit of the water level.

[0011] The water pump cable is connected with the electric signal input end of the water pump at one end and connected with the water pump control module at the other end.

[0012] In a possible implementation manner of the first aspect, a weight is connected to one end of the electric signal wire bundle in the precipitation well.

[0013] In a possible implementation manner of the first aspect, a water collecting pipe is connected to one end of the water pumping pipe out of the precipitation well.

[0014] In a possible implementation manner of the first aspect, a support frame is installed at the bottom of the water collecting pipe, a channel steel is installed at the top end of the support frame, and the water collecting pipe is installed on the channel steel.

[0015] In a possible implementation manner of the first aspect, an exhaust pipe is arranged at the end of the water collecting pipe.

[0016] In a possible implementation manner of the first aspect, a tee joint is fixedly arranged on the water pumping pipe close to one end of the water collecting pipe, and the water collecting pipe is connected with the water pumping pipe through the tee joint.

[0017] In a possible implementation manner of the first aspect, an insulating sleeve is arranged on each of the non-conductive contact point positions of the first electric signal wire, the second electric signal wire and the third electric signal wire.

[0018] In a possible implementation manner of the first aspect, an insulating sleeve is arranged on the water pump cable.

[0019] Compared with the prior art, the utility model has at least the following beneficial effects:

[0020] The utility model provides a device of controlling water level in foundation pit dewatering, through setting up the electrically conductive contact point in the dewatering well, each electrically conductive contact point corresponds to natural water level line, water level line lower limit and water level line upper limit respectively, cooperates the water pump control module, realizes the monitoring and automatic control to the water level in foundation pit dewatering well. Compared with traditional floating ball sensor, because the combination mode of electric signal wire harness and electrically conductive contact point is adopted, makes the device can adapt to different size dewatering well, need not install complex mechanical parts in the narrow dewatering well space, avoids the sensor failure problem caused by environmental restriction, thereby improved the reliability of automatic control. Specifically, after the device starts, the water pump control module continuously monitors the reference potential provided by the first electric signal line, and judges the current water level through the electrically conductive contact state of the second electric signal line and the third electric signal line. When the water level is lower than the lower limit of the water level line, the contact of the second electric signal line is disconnected, and the water pump control module stops the water pump from running, to avoid energy consumption and wear caused by the water pump idling. When the water level exceeds the upper limit of the water level line, the contact of the third electric signal line is closed, sending a start signal to the water pump control module, and the water pump starts pumping immediately until the water level drops below the upper limit of the water level line. When the water level is between the lower limit and the upper limit of the water level line, the water pump remains in standby state, ensuring the safety of the foundation pit and achieving energy saving and efficiency.

[0021] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the specific embodiment of the utility model, the following will be a brief introduction to the drawings needed in the description of the specific embodiment, obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0023] Figure 1 It is the whole structure schematic diagram of the device of controlling water level in foundation pit dewatering of the utility model;

[0024] Figure 2 It is the electric signal wire harness and water level schematic diagram in the device of controlling water level in foundation pit dewatering of the utility model;

[0025] Figure 3 It is the electric signal wire harness schematic diagram in the device of controlling water level in foundation pit dewatering of the utility model;

[0026] Figure 4 It is the water collecting pipe support construction node schematic diagram in the device of controlling water level in foundation pit dewatering of the utility model;

[0027] Figure 5The utility model discloses a device for controlling water level in foundation pit dewatering, which comprises a water collecting pipe head exhaust port schematic diagram.

[0028] Figure 6 The utility model discloses a device for controlling water level in foundation pit dewatering, which comprises a water collecting pipe head exhaust port schematic diagram.

[0029] Figure 7 The utility model discloses a device for controlling water level in foundation pit dewatering, which comprises a water collecting pipe head exhaust port schematic diagram.

[0030] 1-pump;2-dewatering well;20-natural water level line;21-water level lower limit;22-water level upper limit;3-pumping pipe;4-pump control module;5-electrical signal line bundle;50-first electrical signal line;51-second electrical signal line;52-third electrical signal line;6-pump cable;7-water collecting pipe;8-support frame;9-slotted steel;10-exhaust pipe;11-three-way pipe;12-counterweight. DETAILED DESCRIPTION

[0031] In order to make the utility model embodiment's purpose, technical scheme and advantage more clear, the following will be clear, complete to the technical scheme of the utility model with the attached chart is described, obviously, the described embodiment is the utility model a part of embodiment, instead of all the embodiment. Based on the embodiment in the utility model, all other embodiments that the ordinary skill in the art obtains without doing the premise of creative labor belong to the scope of the utility model protection.

[0032] First of all, it needs to be pointed out that in the process of foundation pit excavation, the height of underground water level directly affects the safety and efficiency of construction. If the underground water level is higher, it may cause piping, quicksand and other problems, and even cause ground deformation outside the pit. Therefore, the setting of dewatering well is an important means of underground water control in foundation pit engineering. By extracting underground water through dewatering well, the underground water level in the foundation pit can be effectively reduced to ensure the smooth construction. The dewatering outside the pit reduces the underground water level outside the pit by setting dewatering well, and reduces the influence of underground water on foundation pit excavation.

[0033] Combined with Figures 1 to 3As shown, the utility model embodiment provides a kind of device for controlling water level in foundation pit dewatering, realize the automation control of water level in foundation pit dewatering process, especially suitable for the environment of small and complex space in dewatering well.The device mainly includes water pump 1, pumping pipe 3, water pump control module 4, electric signal wire harness 5 and water pump cable 6, wherein, water pump 1 is located in the position near bottom in dewatering well 2 for foundation pit dewatering.More specifically, water pump 1 selects corrosion-resistant, high-efficiency submersible pump, is installed in the bottom of dewatering well 2, ensure that it can effectively pump water.It needs to be explained, the selection of water pump 1 needs to consider the size of foundation pit, expected precipitation and well depth and other factors comprehensively, to ensure sufficient pumping capacity.Exemplarily, water pump 1 can be lowered to about thirty meters depth.

[0034] One end of pumping pipe 3 is connected to the output end of water pump 1, and the other end extends out of dewatering well 2.More specifically, pumping pipe 3 uses high-strength, wear-resistant PE pipe, one end is connected to the output end of water pump 1, the other end extends out of dewatering well 2 through the hole reserved in well wall, and is connected to the designated drainage system.It also needs to be explained that the diameter of pumping pipe 3 is determined according to the water discharge capacity of water pump 1 to ensure maximum drainage efficiency.

[0035] The water pump control module 4 is located outside the precipitation well 2. The electrical signal wire bundle 5 includes a first electrical signal wire 50, a second electrical signal wire 51 and a third electrical signal wire 52, both ends of which are located inside the precipitation well 2, one end of the first electrical signal wire 50 is connected with one end of the water pump control module 4, and the other ends of the second electrical signal wire 51 and the third electrical signal wire 52 are both connected with the other end of the water pump control module 4; the first electrical signal wire 50 is provided with a conductive contact below the natural water level line 20 inside the precipitation well 2 near one end, the second electrical signal wire 51 is provided with a conductive contact at the lower limit of the water level line 21 inside the precipitation well 2 near one end, and the third electrical signal wire 52 is provided with a conductive contact at the upper limit of the water level line 22 inside the precipitation well 2 near one end; the natural water level line 20 is lower than the lower limit of the water level line 21. Specifically, the electrical signal wire bundle 5 is composed of three independent electrical signal wires (the first electrical signal wire 50, the second electrical signal wire 51 and the third electrical signal wire 52), which are all wrapped by waterproof insulation materials to ensure safety and reliability in the humid environment inside the well. The end of each electrical signal wire is provided with a conductive contact, which is designed to be in direct contact with the well water without being affected by corrosion. The conductive contact of the first electrical signal wire 50 is below the natural water level line 20, serving as a reference potential to ensure a stable reference voltage in all cases. The conductive contact of the second electrical signal wire 51 is arranged at the lower limit of the water level line 21, and when the water level drops to this position, the contact is closed, sending a signal to the water pump control module 4 to stop the water pump. The conductive contact of the third electrical signal wire 52 is located at the upper limit of the water level line 22, and once the water level rises to this position, the contact is also closed, triggering the water pump control module 4 to start the water pump 1 to pump water. For example, the first electrical signal wire 50, the second electrical signal wire 51 and the third electrical signal wire 52 are made of copper wire. The first electrical signal wire 50 is pulled out below the natural water level line 20, the second electrical signal wire 51 is pulled out at the lower limit of the water level line 21, and the third electrical signal wire 52 is pulled out at the upper limit of the water level line 22.

[0036] One end of the water pump cable 6 is connected with the electrical signal input end of the water pump 1, and the other end is connected with the water pump control module 4. That is, the water pump cable 6 is used to transmit the electrical signal and power connection between the water pump 1 and the control module 4. The cable 6 is also designed to be waterproof to ensure its durability in the well environment.

[0037] In detail, after the device is started, the water pump control module 4 continuously monitors the reference potential provided by the first electrical signal line 50 and determines the current water level by the state of the conductive contacts of the second electrical signal line 51 and the third electrical signal line 52. When the water level is lower than the lower limit 21, the contact of the second electrical signal line 51 opens, and the water pump control module 4 stops the operation of water pump 1 to avoid energy consumption and wear caused by the water pump running dry. When the water level exceeds the upper limit 22, the contact of the third electrical signal line 52 closes, sending a start signal to the water pump control module 4, and water pump 1 immediately begins pumping until the water level drops back below the upper limit 22. When the water level is between the lower limit 21 and the upper limit 22, water pump 1 remains in standby mode, ensuring the safety of the foundation pit while achieving energy saving and high efficiency.

[0038] In one embodiment, such as Figure 7 As shown, in the water pump control module, the main switch a is closed to supply power, and two modes can be selected: automatic and manual. When the three-way knob b is selected to the manual position I, manually clicking the start button c energizes the AC contactor coil d, closing the 1KM circuit to start the water pump. Manually clicking the stop button e de-energizes the AC contactor coil d, opening the 1KM circuit to stop the water pump. When the three-way knob b is selected to the automatic position II, after the water level reaches the upper limit, the time relay coil f is energized, closing the 1KT circuit to start the water pump. After the water level reaches the lower limit, the time relay coil f is de-energized, opening the 1KT circuit to stop the water pump, requiring no manual operation. When the three-way knob b is selected to the stop position III, the water pump cannot be started. G is the running indicator light, and h is the power indicator light.

[0039] It should be noted that during the initial installation phase, the positions of the upper limit 22 and the lower limit 21 of the water level line need to be adjusted according to the actual conditions of the foundation pit to ensure that the water level control can meet the construction requirements while avoiding frequent starting and stopping of the water pump.

[0040] Through the above specific implementation methods, this utility model not only solves the problems of high cost and low efficiency of manual monitoring in traditional foundation pit dewatering control, but also overcomes the problem of difficulty in water level monitoring in narrow and complex environments.

[0041] In one possible implementation, such as Figure 2As shown, the electrical signal wire bundle 5 is connected with a counterweight 12 at one end inside the dewatering well 2. Specifically, during the dewatering process of the foundation pit, due to the change of water level in the well and possible soil loosening or water flow disturbance, the electrical signal wire bundle 5 can be physically affected, resulting in its position deviation or distortion. Such deviation will affect the accurate correspondence of the conductive contacts with the water level in the well, thereby affecting the reliability of the entire water level control system. The main function of the counterweight 12 is to increase the stability of the electrical signal wire bundle 5 in water, so that it always remains vertical. In this way, no matter how the water level in the well changes, the conductive contacts (contacts below the lower limit of water level line 21, upper limit of water level line 22 and natural water level line 20) can always accurately correspond to their preset positions, not only improving the accuracy of water level control, but also reducing the false triggering or failure caused by wire bundle deviation.

[0042] Preferably, the counterweight 12 is made of high-density, corrosion-resistant materials such as lead, iron or high-density plastic, etc. to ensure its stability in underwater environment. In terms of shape design, the counterweight 12 is designed to be streamlined or flat to reduce the resistance of water flow.

[0043] In an implementation, as shown in Figure 1 , the water pumping pipe 3 is connected with a water collecting pipe 7 at one end outside the dewatering well 2. Specifically, during the dewatering operation of the foundation pit, the water pumping pipe 3 is responsible for pumping out the accumulated water in the dewatering well 2, and the water collecting pipe 7 serves to collect the pumped-out water.

[0044] Illustratively, the water collecting pipe 7 is arranged around the dewatering well 2 to collect pumped-out water from multiple dewatering wells. Preferably, the water collecting pipe 7 is equipped with flow control valves, pressure gauges and other accessories to control the flow of pumped-out water and monitor the pressure. Through the connection of the water pumping pipe 3 and the water collecting pipe 7, the drainage efficiency can be improved. The water collecting pipe 7 can collect pumped-out water from multiple dewatering wells, reducing the number of drainage pipelines and construction costs.

[0045] In an implementation, as shown in Figure 1 and Figure 4 , the bottom of the water collecting pipe 7 is installed with a support frame 8, the top end of the support frame 8 is installed with a channel steel 9, and the water collecting pipe 7 is installed on the channel steel 9. Specifically, the support frame 8 serves as the main load-bearing structure of the water collecting pipe 7. The support frame 8 is made of steel and has sufficient strength. The bottom of the support frame 8 is fixed to the ground or foundation to prevent it from shifting or overturning, ensuring the stability of the water collecting pipe 7 during installation and use.

[0046] In an implementation, as shown in Figure 5As shown, the end of the water collecting pipe 7 is provided with an exhaust pipe 10. During the process of foundation pit dewatering, as the water pump 3 continuously pumps out the water accumulated in the well, the air pressure in the well will gradually decrease, forming a negative pressure environment, which will affect the pumping efficiency. The setting of the exhaust pipe 10 balances the air pressure inside and outside the well, prevents the formation of a negative pressure environment, and thus ensures the smooth progress of the drainage operation.

[0047] In an implementation manner, as shown in Figure 6 As shown, the end of the water collecting pipe 7 is provided with an exhaust pipe 10. During the process of foundation pit dewatering, as the water pump 3 continuously pumps out the water accumulated in the well, the air pressure in the well will gradually decrease, forming a negative pressure environment, which will affect the pumping efficiency. The setting of the exhaust pipe 10 balances the air pressure inside and outside the well, prevents the formation of a negative pressure environment, and thus ensures the smooth progress of the drainage operation.

[0048] In an implementation manner, the non-conductive contact positions on the first, second and third electric signal lines 50, 51 and 52 are all sleeved with insulating sleeves. The insulating sleeves wrap the non-conductive contact positions on the first, second and third electric signal lines 50, 51 and 52 to prevent electric shock accidents or short circuit failures caused by exposed electric wires.

[0049] In an implementation manner, the water pump cable 6 is sleeved with an insulating sleeve, which enhances the insulation performance of the water pump cable 6, thereby ensuring the electrical safety of the device during operation and preventing the risk of electric shock or short circuit failure caused by exposed or aged cable.

[0050] Exemplarily, the insulating sleeve is made of silica gel material, which can well adapt to the bending and movement of the water pump cable.

[0051] In the description of the present application, it should be understood that the terms "upper", "lower", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0052] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0053] In the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0055] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0056] Finally, it should be noted that: the above-described embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, and are not limited thereto, the protection scope of the present application is not limited thereto, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: any person skilled in the art within the technical range disclosed by the present application, it can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A device for controlling water level in a foundation pit dewatering, characterized by, The utility model relates to a water pumping system for foundation pit dewatering, comprising: a water pump (1) arranged in a dewatering well (2) for foundation pit dewatering near the bottom; a water pumping pipe (3) with one end connected to the output end of the water pump (1) and the other end extending out of the dewatering well (2); a water pump control module (4) arranged outside the dewatering well (2); an electric signal cable harness (5) comprising a first electric signal cable (50), a second electric signal cable (51) and a third electric signal cable (52) with one end of each cable located in the dewatering well (2), the other end of the first electric signal cable (50) connected to one end of the water pump control module (4), the other end of the second electric signal cable (51) and the third electric signal cable (52) connected to the other end of the water pump control module (4); the first electric signal cable (50) is provided with a conductive contact below the natural water level (20) in the dewatering well (2) near one end, the second electric signal cable (51) is provided with a conductive contact at the lower limit of water level (21) in the dewatering well (2) near one end, and the third electric signal cable (52) is provided with a conductive contact at the upper limit of water level (22) in the dewatering well (2) near one end; the natural water level (20) is lower than the lower limit of water level (21); a water pump cable (6) with one end connected to the electric signal input end of the water pump (1) and the other end connected to the water pump control module (4).

2. The device for controlling water level in a foundation dewatering according to claim 1, characterized in that, The end of the electric signal cable harness (5) located in the dewatering well (2) is connected with a counterweight (12).

3. The device for controlling water level in a foundation dewatering according to claim 1, characterized in that, The end of the water pumping pipe (3) extending out of the dewatering well (2) is connected with a water collecting pipe (7).

4. The device for controlling water level in a foundation dewatering according to claim 3, characterized in that, The bottom of the water collecting pipe (7) is provided with a support frame (8), the top end of the support frame (8) is provided with a channel steel (9), and the water collecting pipe (7) is installed on the channel steel (9).

5. The device for controlling water level in a foundation dewatering according to claim 3, characterized in that, The end of the water collecting pipe (7) is provided with an exhaust pipe (10).

6. The device for controlling water level in a foundation dewatering according to claim 3, characterized in that, The water pumping pipe (3) is fixedly provided with a tee joint (11) near the water collecting pipe (7), and the water collecting pipe (7) and the water pumping pipe (3) are connected through the tee joint (11).

7. The device for controlling water level in a foundation dewatering according to claim 1, characterized in that, The non-conductive contact positions of the first electric signal cable (50), the second electric signal cable (51) and the third electric signal cable (52) are each provided with an insulating sleeve.

8. The device for controlling water level in a foundation dewatering according to claim 1, characterized in that, The water pump cable (6) is provided with an insulating sleeve.

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