Vacuum dewatering well capable of accelerating drainage efficiency

Abstract

A vacuum dewatering well capable of accelerating drainage efficiency comprises a well casing, a well lid, a drainage pipe and a water suction pump, the well lid covers the well casing, the drainage pipe is connected to the well lid in an inserted mode, the water suction pump is placed on the drainage pipe at the outer end of the well casing, and the vacuum dewatering well further comprises an inner cavity negative pressure pipe, a vacuum pump, a water and gas communicating pipe and a sensor. An inner cavity negative pressure pipe is arranged in an inner cavity of the well pipe and penetrates through the well lid, an inner cavity gate valve is arranged on the inner cavity negative pressure pipe at the outer end of the well pipe, the outer end of the inner cavity negative pressure pipe is communicated with a vacuum pump extraction opening, the vacuum pump extraction opening is communicated with a water-gas communicating pipe through a middle cavity gate valve, and a water return connector is formed in the water-gas communicating pipe. A normally-closed water return gate valve is arranged on the water return connector. The device can monitor underground water conditions, improve soil permeability, improve precipitation efficiency, evaluate precipitation effect, prevent blockage in the well, optimize precipitation strategies and provide reliable data, and is simple to operate and low in manpower resource consumption.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of foundation pit dewatering, and relates to a vacuum dewatering well. BACKGROUND

[0002] The working principle of the vacuum dewatering well is that the vacuum effect generated by the water pumping host is used to continuously pump underground water out of the well point pipe and lead to the ground through the well point pipe, so that the system of the underground water level is lowered.

[0003] The existing vacuum dewatering well may have many situations when vacuum pumping is performed due to the complex underground environment, and it is difficult to comprehensively and timely detect the underground water condition by manual detection, which is easy to cause waste of manpower and material resources. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the utility model provides a vacuum dewatering well capable of accelerating drainage efficiency, monitoring underground water condition, improving soil layer permeability, improving dewatering efficiency, evaluating dewatering effect, preventing well blockage, optimizing dewatering strategy, providing reliable data, and being simple in device operation and low in consumption of human resources.

[0005] The utility model adopts the technical scheme that:

[0006] A vacuum dewatering well capable of accelerating drainage efficiency, comprising a well pipe, a well cover, a drainage pipe and a water pump, the well cover covers the well pipe, the drainage pipe is inserted into the well cover, and the water pump is placed on the drainage pipe at the outer end of the well pipe, the vacuum dewatering well further comprises an inner cavity negative pressure pipe, a vacuum pump, a water and gas communication pipe and a sensor for measuring the water flow in the drainage pipe in real time, the sensor is connected with the drainage pipe inserted into the well pipe, the inner cavity of the well pipe is provided with the inner cavity negative pressure pipe, the inner cavity negative pressure pipe passes through the well cover, an inner cavity gate valve is arranged on the inner cavity negative pressure pipe at the outer end of the well pipe, the outer end of the inner cavity negative pressure pipe is communicated with the air suction port of the vacuum pump, the air suction port of the vacuum pump is communicated with the water and gas communication pipe through a middle cavity gate valve, a backwater interface is arranged on the water and gas communication pipe, and a normally closed backwater gate valve is arranged on the backwater interface.

[0007] Further, the vacuum dewatering well further comprises a water stop layer and an outer pipe filter layer, the outer pipe filter layer surrounds the outer side of the well pipe, the water stop layer is filled above the outer pipe filter layer, and the water stop layer is used for preventing underground water from being mixed with layers and fixing the water and gas communication pipe.

[0008] Still further, the lower end of the well pipe is provided with a filter screen for blocking silt particles in the soil around the well pipe from entering the well pipe, the lower end of the filter screen is provided with a bottom pipe, the bottom pipe is a channel for underground water to enter the dewatering well, the bottom pipe is provided with a water filtering hole around the bottom pipe, two layers of nylon cloth are placed on the upper end of the bottom pipe for further filtering underground water, and the outer periphery of the well pipe and the filter screen is filled with a filter layer for filtering particles in underground water.

[0009] Preferably, the bottom pipe is a reverse conical closed pipe body.

[0010] The well lid is fixed with the flange plate of the well pipe through bolts.

[0011] The beneficial effects of the utility model mainly manifest in:

[0012] (1) the device sets the bottom end of the drain pipe into a reverse conical shape, which is faster in drainage speed, the conical design can concentrate water flow, according to the principle of fluid mechanics, the water flow cross-sectional area becomes smaller, and the flow rate will be accelerated, so that the water is drained more efficiently. Two, it can effectively prevent blockage, the shape of the cone makes it difficult for solid impurities to accumulate at the pipe opening, which is more conducive to washing away impurities with water flow. The device has the advantages of real-time monitoring.

[0013] (2) the device mainly monitors the flow rate of water in the well in real time through the sensor, which is convenient for evaluating the dewatering effect, preventing well blockage and optimizing the dewatering strategy. In addition to the water speed sensor, there are temperature, water level and water quality sensors to monitor the environmental parameters in the dewatering well in real time, reduce labor costs, the sensor is located in the well drainage pipe, and the water pump is arranged on the outside of the well drainage pipe, which avoids damage to the device caused by external factors and improves the durability of the device, so that the device can be reused to the greatest extent, reducing construction cost and resource waste.

[0014] (3) the device has the advantages of high efficiency of filtering silt. The lower end of the well pipe of the device is provided with a filter screen, the lower end of the filter screen is provided with a bottom pipe, the bottom pipe is a reverse conical closed pipe body, and two layers of nylon cloth are placed on the bottom pipe. Double-layer filtration reduces the blockage of the drain pipe, realizes efficient work of the dewatering well, and improves the construction efficiency.

[0015] (4) the device also has the advantages of simple operation, rapid construction and low cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a structure schematic view of the vacuum dewatering well structure of the embodiment of the utility model;

[0017] Fig. 2 is an elevation schematic view of the drain pipe;

[0018] Fig. 3 is a structure schematic view of the well mouth part of the vacuum dewatering well structure of the embodiment of the utility model;

[0019] The reference signs are: 1 is a well lid, 2 is a water stop layer, 3 is an outer pipe filter layer, 4 is a well pipe, 5 is a filter layer, 6 is a sensor, 7 is a water gas communication pipe, 8 is a bottom pipe, 9 is nylon cloth, 10 is a filter screen, 11 is a drain pipe, 12 is an inner cavity negative pressure pipe, 13 is an inner cavity gate valve, 14 is a middle cavity gate valve, 15 is a backwater gate valve, 16 is a backwater interface, and 17 is a water pump. DETAILED DESCRIPTION

[0020] The utility model will be further described below in combination with the drawings.

[0021] Referring to Figs. 1-3 A vacuum dewatering well for accelerating the dewatering efficiency, the well lid 1 is fixed with the flange plate of the well pipe 4 by bolts, the drain pipe 11 is inserted into the well pipe 4 through the well lid 1, the water pump 17 is placed on the drain pipe 11 at the outer end of the well pipe 4, the sensor 6 is connected with the drain pipe 11 inserted into the well pipe 4, and the water flow in the drain pipe is measured in real time, the speed and water volume of dewatering are understood through the flow sensor, the dewatering system is reasonably planned, the dewatering capacity is evaluated, and the pipeline overload is prevented.

[0022] The inner cavity of the well pipe 4 is provided with the inner cavity negative pressure pipe 12, the negative pressure can increase the pressure difference between the underground water and the well to accelerate the extraction of the underground water, the inner cavity gate valve 13 is opened when the vacuum pump works, the vacuum pump starts to extract the air of the inner cavity negative pressure pipe 12, the water gas communication pipe 7 is connected to the air outlet of the vacuum pump through a middle cavity gate valve 14, the air pressure is balanced and the water flow is promoted, the backwater interface 16 is arranged on the water gas communication pipe 7 and is used for receiving the channel of the backflow liquid, the backwater gate valve 15 is arranged on the backwater interface 16, and the backwater gate valve 15 is usually closed to prevent the underground water from flowing back to the well pipe 4 through the backwater gate valve 15.

[0023] The lower end of the well pipe 4 is provided with a filter screen 10, which effectively blocks the silt particles in the soil around the well pipe from entering the well pipe 4. The lower end of the filter screen 10 is provided with a bottom pipe 8, which is a reverse conical closed pipe body. The bottom pipe 8 is a channel for groundwater to enter the well, and it is at the bottom of the well, surrounded by filter holes. Due to the pressure difference of groundwater, when the water level in the well is lower than the surrounding aquifer under natural conditions, the groundwater will enter the well through the filter holes of the bottom pipe 8 under the action of water pressure. At the same time, when connected to a vacuum pump and other equipment, a vacuum negative pressure environment will be formed in the well pipe. This negative pressure will further increase the pressure difference between the groundwater and the well, so that the groundwater is sucked into the well through the bottom pipe more quickly, thereby lowering the groundwater level. Just like using a straw to suck water, the water is sucked up by creating a pressure difference. The filter holes of the bottom pipe can prevent a large amount of silt from flowing in, ensuring smooth water flow while preventing the bottom pipe from being blocked. Two layers of nylon cloth 9 are placed on the upper end of the bottom pipe 8 for further filtering of groundwater. The outer periphery of the well pipe 4 and the filter screen 10 is filled with a filter material layer 5 for filtering particles in the groundwater. By sequentially arranging the filter material layer 5 and the filter screen 10 outside the well pipe 4, the filtering effect of the permeable layer can be improved. The upper part of the outer pipe filter material layer 3 is filled with a water stop layer 2.

[0024] In this embodiment, the well cover 1 covers the well pipe 4, and the drainage pipe 11 and the inner cavity negative pressure pipe 12 are fixed. The water stop layer 2 is used to prevent groundwater from layering and fix the water and gas communication pipe 7. The outer pipe filter material layer 3 surrounds the outside of the well pipe 4 and is made of coarse sand, gravel and other materials. The well pipe 4 is used to support the well wall to prevent collapse. The filter material layer 5 fills the outer periphery of the filter screen 10 and is used to filter particles in the groundwater. The sensor 6 is used to monitor the water flow in the drainage pipe 11 in real time. The water and gas communication pipe 7 is used to balance the air pressure in the vacuum well and extends into the water stop layer 2 and the outer pipe filter material layer 3. Two layers of nylon cloth 9 are placed on the upper end of the bottom pipe 8, connected to the filter screen 10, and the filter screen 10 has a filter material layer 5. The nylon cloth 9 is placed on the bottom pipe 8 for filtering. The filter screen 10 has a filter material layer 5. The drainage pipe 11 has a sensor 6 at one end extending into the well pipe 4, and the other end is connected to a water pump 17 outside the well pipe 4. The inner cavity negative pressure pipe 12 is connected to the inner cavity negative pressure pipe 12. When the vacuum pump starts to work, the inner cavity negative pressure pipe 12 is opened, and the vacuum pump starts to extract the air in the inner cavity of the vacuum well. One end extends into the well pipe 4, and the other end is outside the well pipe 4. The inner cavity gate valve 13 is connected to the middle cavity gate valve 14. The middle cavity gate valve 14 is connected to the backwater gate valve 15 and the water and gas communication pipe 7. The backwater gate valve 15 is connected to the backwater interface 16 and is used to control the backwater interface to receive backflow liquid, which is usually in a closed state. The backwater interface 16 is a channel for receiving backflow liquid.

[0025] The embodiments described in the specification are only enumerations of the implementation forms of the utility model concept, and are only for the purpose of description. The protection scope of the utility model should not be regarded as being limited to the specific forms described in the embodiments, and the protection scope of the utility model also extends to equivalent technical means that can be thought of by those skilled in the art according to the utility model concept.

Claims

1. A vacuum dewatering well for accelerating drainage efficiency, comprising a well pipe, a well cover, a drainage pipe, and a water pump, wherein the well cover covers the well pipe, the drainage pipe is plugged into the well cover, and the water pump is placed on the drainage pipe at the outer end of the well pipe, characterized in that: The vacuum dewatering well also includes an inner cavity negative pressure pipe, a vacuum pump, a water-gas connecting pipe and a sensor for real-time measurement of the water flow in the drainage pipe. The sensor is connected to the drainage pipe inserted into the well pipe. The inner cavity of the well pipe is provided with an inner cavity negative pressure pipe. The inner cavity negative pressure pipe passes through the well cover. An inner cavity gate valve is provided on the inner cavity negative pressure pipe at the outer end of the well pipe. The outer end of the inner cavity negative pressure pipe is connected to the vacuum pump suction port. The vacuum pump suction port is connected to the water-gas connecting pipe through the middle cavity gate valve. A return water interface is provided on the water-gas connecting pipe, and a normally closed return water gate valve is provided on the return water interface.

2. A vacuum dewatering well for accelerating drainage efficiency according to claim 1, characterized in that: The vacuum dewatering well also includes a water-stop layer and an outer filter layer. The outer filter layer surrounds the outside of the well pipe, and the top of the outer filter layer is filled with a water-stop layer. The water-stop layer is used to prevent groundwater from flowing through the layers and fix the water-gas connecting pipe.

3. A vacuum dewatering well for accelerating drainage efficiency according to claim 1 or 2, characterized in that: A filter is provided at the lower end of the well pipe to prevent mud and sand particles in the soil around the well pipe from entering the well pipe. A bottom pipe is provided at the lower end of the filter, which is the channel for groundwater to enter the precipitation well. There are water filter holes around the bottom pipe, and two layers of nylon cloth are placed on the upper end of the bottom pipe to further filter groundwater. The outer periphery of the well pipe and the filter is filled with a filter material layer for filtering particles in the groundwater.

4. A vacuum dewatering well for accelerating drainage efficiency as claimed in claim 3, characterized in that: The bottom tube is an inverted conical closed tube.

5. A vacuum dewatering well for accelerating drainage efficiency according to claim 1 or 2, characterized in that: The well cover is fixed to the flange of the well pipe by bolts.

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