CN217150166U - Pneumatic precipitation device for accelerating water collection by utilizing negative pressure - Google Patents
Pneumatic precipitation device for accelerating water collection by utilizing negative pressure Download PDFInfo
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- CN217150166U CN217150166U CN202220092740.2U CN202220092740U CN217150166U CN 217150166 U CN217150166 U CN 217150166U CN 202220092740 U CN202220092740 U CN 202220092740U CN 217150166 U CN217150166 U CN 217150166U
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Abstract
The utility model relates to an utilize pneumatic precipitation device of negative pressure catchment with higher speed, include: the well sealing cover seals a wellhead of the dewatering well, and the top of the well sealing cover is provided with a plurality of through holes; the PLC control cabinet is positioned outside the sealed well cover; the Roots blower is electrically connected with the PLC control cabinet; the air exhaust pipe is connected with the Roots blower and extends into the precipitation well through the through hole; the pressure sensor is electrically connected with the PLC control cabinet; a screw air compressor; one end of the main air pipe is connected with the screw air compressor, and the other end of the main air pipe extends into the PLC control cabinet; the upper end of the upper gas distributing pipe extends into the PLC control cabinet and is connected with the main gas pipe; the gas distribution valve is connected with the upper gas distribution pipe; the lower gas distribution pipe is connected with the gas distribution valve and extends into the precipitation well through the through hole; the gas-water displacer is positioned at the bottom of the dewatering well and is connected with the lower gas distribution pipe; and a drain pipe.
Description
Technical Field
The utility model relates to a building engineering field particularly relates to an utilize pneumatic precipitation device of negative pressure catchment with higher speed.
Background
In China, underground projects such as highway tunnels, subways, underground pipe networks and the like which are built and proposed are increased day by day, and the underground projects can not pass through a section with complicated engineering hydrogeological conditions. Before the underground engineering is built, the underground water seepage field is in a dynamic balance state, but the underground engineering construction can break the balance, so that the underground water seeps to the underground working surface. Regional precipitation engineering is required to ensure the safety of underground working faces and facilitate construction. The current precipitation devices used in engineering are mainly vacuum pumps, submersible pumps or pneumatic precipitation devices and the like. However, in a natural state, gap water in soil around the precipitation well is gathered into the precipitation well under the action of gravity, and the water collecting speed is limited, so that the water construction period is influenced. Therefore, a device capable of automatically dewatering is needed, so that the water collecting speed is increased, the dewatering amount is increased, and the whole dewatering period is shortened.
SUMMERY OF THE UTILITY MODEL
From prior art, the utility model aims to provide an utilize pneumatic precipitation device that negative pressure catchments with higher speed, through this pneumatic precipitation device, can accelerate precipitation well's the speed of catchmenting, increase precipitation, improve whole precipitation efficiency, shorten the precipitation time limit for a project.
According to the utility model discloses, aforementioned task is solved through a pneumatic precipitation device that utilizes the negative pressure to catchment with higher speed, include:
the well sealing cover seals a wellhead of the dewatering well, and the top of the well sealing cover is provided with a plurality of through holes;
the PLC control cabinet is positioned outside the sealed well cover;
the Roots blower is electrically connected with the PLC control cabinet;
the air exhaust pipe is connected with the Roots blower and extends into the precipitation well through the through hole;
the pressure sensor is electrically connected with the PLC control cabinet;
the screw air compressor is in signal connection with the PLC control cabinet;
one end of the main air pipe is connected with the screw air compressor, and the other end of the main air pipe extends into the PLC control cabinet;
the upper end of the upper gas distributing pipe extends into the PLC control cabinet and is connected with the main gas pipe;
the gas distribution valve is connected with the upper gas distribution pipe;
the lower gas distribution pipe is connected with the gas distribution valve and extends into the precipitation well through the through hole;
the gas-water displacer is positioned at the bottom of the dewatering well and is connected with the lower gas distribution pipe; and
and the water drain pipe penetrates through the through hole and is connected with the air-water displacer.
Further, the top of the gas-water displacer is provided with a gas inlet and a water outlet;
the air inlet of the air-water displacer is connected with the lower gas distribution pipe;
the water drainage pipe is connected with a water outlet of the gas-water displacer;
the side wall of the gas-water displacer is provided with a water inlet, and the water inlet is provided with an automatic door.
Further, a pipeline or equipment is placed in the precipitation well through a plurality of through holes in the top of the sealed well cover, and gaps of the through holes are sealed by structural adhesive;
the wellhead of dewatering well is provided with bentonite, the side of sealed well casing at least part inserts bentonite.
Further, the air exhaust pipe below the sealed well cover is a slotted or screened air exhaust pipe and is provided with a plurality of air inlets;
the bottom end of the extraction pipe is positioned above the water surface of the groundwater in the dewatering well.
Further, the PLC control cabinet is used for setting the gas injection time and the gas discharge time of the compressed gas and the pressure range in the precipitation well.
Further, the pressure sensor is provided with a probe, a transmitter and a line for connecting the probe and the transmitter, wherein the probe and the line extend into the precipitation well through the through hole, and the probe is positioned above the water surface of the groundwater in the precipitation well;
the pressure sensor measures the pressure in the precipitation well, when the pressure in the precipitation well reaches the atmospheric pressure, the PLC control cabinet receives an electric signal of the pressure sensor, then sends the electric signal to control the starting of the Roots blower, and exhausts the air in the precipitation well;
when the pressure in the precipitation well reaches 0kPa, the PLC control cabinet receives the electric signal of the pressure sensor and then sends the electric signal to control the Roots blower to stop running.
Further, the PLC control cabinet sends a signal to the screw air compressor to control the start and stop of the screw air compressor;
the screw air compressor is configured to generate a compressed gas.
Furthermore, the gas distribution valve is a three-way valve with a first port, a second port and a third port, wherein the first port is connected with the lower end of the upper gas distribution pipe, the second port is connected with the upper end of the lower gas distribution pipe, and the third port is used for communicating the atmosphere;
and the gas distributing valve is in signal connection with the PLC control cabinet.
Further, the PLC control cabinet sends a signal to a gas distribution valve, the gas distribution valve is controlled to close the first port, the second port and the third port are opened, and the lower gas distribution pipe and the gas-water displacer are communicated with the atmosphere;
the gas in the gas-water displacer is discharged along the lower gas distribution pipe through a third port of the gas distribution valve;
an automatic door of a water inlet of the gas-water displacer is opened under the pressure of underground water in the precipitation well, and the underground water enters the gas-water displacer.
Further, the PLC control cabinet sends signals to the gas distribution valve to control a first port and a second port of the gas distribution valve to be opened and a third port of the gas distribution valve to be closed, so that the upper gas distribution pipe is communicated with the lower gas distribution pipe, and the compressed gas is conveyed to the gas-water displacer from the screw air compressor through the main gas pipe, the upper gas distribution pipe and the lower gas distribution pipe;
after the compressed gas is conveyed to the gas-water displacer, an automatic door of a water inlet of the gas-water displacer is closed under pressure, and meanwhile, underground water in the gas-water displacer enters the drain pipe under pressure and is conveyed to a drain pipe outside the dewatering well through the drain pipe.
The utility model discloses have following beneficial effect at least: (1) the utility model provides a pneumatic precipitation device for accelerating water collection by utilizing negative pressure, which can accelerate the water collection speed of a precipitation well, increase the precipitation amount, improve the overall precipitation efficiency and shorten the precipitation period; (2) the pneumatic dewatering device automatically operates without manual inspection and frequent switching on and off of an electric brake, so that the labor cost is reduced; (3) the pneumatic precipitation device can realize continuous precipitation, and the operation is not influenced by the waterless idle running in the precipitation well; (4) the pneumatic precipitation device is simple and convenient to operate, time-saving, labor-saving and high in precipitation speed.
Drawings
The invention will be further elucidated with reference to specific embodiments in conjunction with the drawing.
Fig. 1 is a schematic structural diagram of a pneumatic precipitation device for accelerating water collection by using negative pressure according to an embodiment of the present invention;
fig. 2 is a schematic diagram showing the structure of an air exhaust pipe of a pneumatic precipitation device for accelerating water collection by using negative pressure according to an embodiment of the present invention; and
fig. 3 shows the working flow of the pneumatic precipitation device for accelerating water collection by negative pressure according to an embodiment of the present invention.
Detailed Description
It should be noted that the components in the figures may be shown exaggerated for illustrative purposes and are not necessarily to scale. In the figures, identical or functionally identical components are provided with the same reference symbols.
In the present invention, unless otherwise specified, "disposed on …", "disposed over …" and "disposed over …" do not exclude the presence of an intermediate therebetween.
In the present invention, the embodiments are only intended to illustrate the aspects of the present invention, and should not be construed as limiting.
In the present application, the terms "a" and "an" do not exclude the presence of a plurality of elements, unless otherwise indicated.
It is also noted herein that in embodiments of the present invention, only a portion of the components or assemblies may be shown for clarity and simplicity, but those of ordinary skill in the art will appreciate that under the teachings of the present invention, the required components or assemblies may be added as needed for a particular situation.
It is also to be noted that, within the scope of the present invention, the expressions "identical", "equal", etc., do not mean that the two values are absolutely equal, but allow a certain reasonable error, that is, the expressions also cover "substantially identical", "substantially equal".
In the present application, "connection" between transport devices such as pipes means not only mechanical connection but also circulation of fluid, that is, "communication" between connected elements.
The invention will be further elucidated below on the basis of specific embodiments.
Fig. 1 is a schematic structural diagram of a pneumatic precipitation device for accelerating water collection by using negative pressure according to an embodiment of the present invention; fig. 2 shows a schematic structural diagram of an exhaust tube of a pneumatic precipitation device for accelerating water collection by using negative pressure according to an embodiment of the present invention.
As shown in figure 1, the pneumatic precipitation device for accelerating water collection by using negative pressure comprises a sealed well cover 101, a PLC (programmable logic controller) control cabinet 102, a Roots blower 103, an exhaust pipe 104, a pressure sensor 105, a screw air compressor 106, a main air pipe 107, an air distribution pipe 108, an air distribution valve 109, an air-water displacer 110 and a drain pipe 111.
The dewatering well 200 is used to lower the ground water level or drain the ground water. The dewatering well 200 is provided with a filter screen 400 for filtering silt to prevent the silt from entering the dewatering well and causing blockage. And bentonite 300 is arranged at the wellhead of the dewatering well 200 for sealing the well.
The sealing well cover 101 is positioned on the dewatering well 200 and seals the wellhead of the dewatering well 200. The side of the sealing well cover 11 is 50 mm inserted with bentonite 300, and the joint of the sealing well cover and the bentonite is sealed by cement. The top of sealed well casing 101 has a plurality of through-holes (not shown), can place pipeline or equipment in the precipitation well through this through-hole to the gap of through-hole is glued the shutoff with the structure, guarantees sealed effect, prevents that the outside air from getting into in the well, causes pressure loss. The sealed well cover 101 is made of metal, has certain bearing capacity under the condition of ensuring the sealing effect, and can prevent people from mistakenly stepping into the well.
The PLC control cabinet 102 is located outside the sealed well cover 101 and used for controlling equipment of the pneumatic precipitation device to achieve full-automatic operation of rapid water collection in the precipitation well and water discharge in the precipitation well.
The Roots blower 103 is located outside the sealed well casing 101 and is electrically connected to the PLC control cabinet 102. The roots blower 103 is used to discharge air in the precipitation well 200. After the Roots blower 103 discharges air in the precipitation well, micro negative pressure is formed in the precipitation well, so that the water collecting speed in the precipitation well is increased. The PLC control cabinet 102 controls the starting and stopping of the Roots blower 103 so as to control the negative pressure state in the precipitation well.
The extraction pipe 104 is connected with the Roots blower 103 and extends into the precipitation well through the through hole of the sealed well cover 101, and the bottom end of the extraction pipe 104 is positioned above the water surface of the underground water 500 in the precipitation well. As shown in fig. 2, the suction pipe 104 is made of a slotted or perforated pipe material in a portion below the sealed well cover 101, and the body of the suction pipe 104 below the sealed well cover 101 has a plurality of air inlets 1041. Under the same pressure, the resistance can be reduced by adopting a slotted or screened pipe, the air inlet sectional area can be increased, and the air inlet amount can be increased. The exhaust tube 104 is made of non-metal materials, such as PE and PVC pipes, and prevents the metal pipes from rusting to influence the exhaust effect.
The pressure sensor 105 is electrically and signally connected with the PLC control cabinet 102. The pressure sensor 105 includes a probe 1051, a line 1052, a transmitter 1053, wherein the line 1052 connects the transmitter 1053 and the probe 1051. The line 1052 and probe 1051 of the pressure sensor 105 are placed in the precipitation well through the through hole of the sealed well casing 101, and the probe 1051 of the pressure sensor 105 is located above the surface of the groundwater 500 in the precipitation well. The probe 1051 measures the pressure in the precipitation well, transmits the pressure to the transmitter 1053 through the line 1052, and sends an electrical signal to the PLC control cabinet 102 through the transmitter 1053.
The pressure sensor 105 measures the pressure in the precipitation well, when the pressure in the precipitation well reaches the local atmospheric pressure, the PLC control cabinet 102 receives an electric signal of the pressure sensor 105, then sends the electric signal to control the Roots blower 103 to start, and exhausts the air in the precipitation well; when the pressure in the precipitation well reaches 0kPa, the PLC control cabinet 102 receives a signal of the pressure sensor 105 and then sends an electric signal to control the Roots blower 103 to stop running, so that circulation is generated, the precipitation well is always kept in a set negative pressure state, and pore water in soil near the precipitation well can flow into the precipitation well at an accelerated speed due to the difference of the pressure in the precipitation well and the pressure outside the precipitation well.
The screw air compressor 106 is positioned outside the sealed well cover 101, is in signal connection with the PLC control cabinet 102 and is used for generating compressed air, wherein the pressure of the compressed air is kept in the range of 500kPa-600 kPa.
The main gas pipe 107 is located outside the sealed well cover 101, one end of the main gas pipe 107 is connected with the screw air compressor 106, and the other end of the main gas pipe 107 extends into the PLC control cabinet 102. The main gas pipe 107 is used for conveying the compressed gas generated by the screw air compressor 106.
The gas-distributing pipe 108 includes an upper gas-distributing pipe 1081 and a lower gas-distributing pipe 1082. The upper gas distributing pipe 1081 is located outside the sealed well cover 101, and the upper end of the upper gas distributing pipe 1082 extends into the PLC control cabinet 102 and is connected with the main gas pipe 107, and the lower end is connected with the gas distributing valve 109. The upper end of the lower gas distributing pipe 1082 is connected with the gas distributing valve 109 and extends into the precipitation well through a through hole of the sealed well cover 101, and the lower end of the lower gas distributing pipe 1082 is connected with the gas-water displacer 110. The gas manifold 108 is used to deliver compressed gas to a gas-water displacer 110. In other embodiments of the present invention, a plurality of gas distribution pipes may be connected to the main gas pipe.
The gas distributing valve 109 is positioned outside the sealed well cover 101, is in signal connection with the PLC control cabinet 102 and is used for controlling the start and stop of the compressed gas injection gas-water displacer 110. The gas distributing valve 109 is a three-way valve, wherein a first port is connected with the lower end of the upper gas distributing pipe 1081, a second port is connected with the upper end of the lower gas distributing pipe 1082, and a third port is used for communicating atmosphere. The first port and the second port are opened, the third port is closed, and the upper gas distribution pipe is communicated with the lower gas distribution pipe.
The gas-water displacer 110 is positioned at the bottom of the dewatering well, and the gas inlet of the gas-water displacer is connected with the gas distribution pipe 108. The gas-water displacer 110 also includes a water inlet (not shown) disposed in a sidewall of the gas-water displacer. The water inlet is provided with an automatic door, and the automatic door is closed under the pressure action of compressed gas during gas injection; after stopping gas injection, the automatic door is opened under the pressure of the groundwater in the dewatering well.
The drain pipe 111 extends into the precipitation well through the through hole of the sealed well cover 101, the lower end of the drain pipe 111 is connected with the water outlet of the gas-water displacer 110, and the upper end of the drain pipe 111 is connected with a drain pipe 112 outside the precipitation well.
Fig. 3 shows the working flow of the pneumatic precipitation device for accelerating water collection by negative pressure according to an embodiment of the present invention.
As shown in fig. 3, the pneumatic precipitation device for accelerating water collection by negative pressure has the following precipitation process:
step 1, starting a pneumatic precipitation device. And starting the PLC control cabinet, and controlling the pressure sensor to be started by the PLC control cabinet.
And 2, setting precipitation gas injection and gas discharge time and a pressure target interval in the well. The gas injection time and the gas discharge time of the compressed gas and the pressure intensity range in the precipitation well are set through the PLC control cabinet. The gas injection time is the time for injecting the compressed gas into the gas-water displacer. The air discharge time is the time for opening the third port of the air distribution valve to be communicated with the atmosphere and discharging the residual air out of the air-water displacer along the air distribution pipe. In one embodiment of the present invention, the gas injection time is set to 60 seconds, the gas release time is set to 30 seconds, the gas injection and gas release are performed alternately, and the pressure range in the precipitation well is set to 0-101.325 kPa.
And 3, starting the Roots blower to control the internal pressure of the dewatering well within a set range. The pressure sensor measures the pressure in the precipitation well, when the pressure in the precipitation well reaches the atmospheric pressure, the PLC control cabinet receives a signal of the pressure sensor, then the Roots blower is controlled to start, and the air in the precipitation well is discharged to reduce the pressure in the precipitation well; when the pressure in the precipitation well reaches 0kPa, the PLC control cabinet controls the Roots blower to stop running; and circulating to maintain the pressure inside and outside the dewatering well in the range of 0kPa to atmospheric pressure. Because the micro negative pressure is formed in the dewatering well, the underground water in the soil around the dewatering well flows into the dewatering well at an accelerated speed, and the water collecting speed in the well can be accelerated. In one embodiment of the present invention, the atmospheric pressure is 101.325kPa and the pressure in the precipitation well ranges from 0 to 101.325 kPa.
And 4, starting the screw air compressor to generate compressed gas. The PLC control cabinet sends a signal to the screw air compressor to control the screw air compressor to be started so as to generate compressed air, and the pressure intensity of the compressed air is kept within the range of 500-600 kPa.
And 5, discharging residual gas in the gas-water displacer, and allowing underground water to enter the gas-water displacer. And in the air bleeding time, the PLC control cabinet sends a signal to the air bleeding valve, controls the air bleeding valve to close the first port and open the second port and the third port, so that the lower air bleeding pipe and the air-water displacer are communicated with the atmosphere, and residual air in the air-water displacer is discharged through the third port of the air bleeding valve along the lower air bleeding pipe. Meanwhile, an automatic door of a water inlet of the gas-water displacer is opened under the pressure of underground water in the precipitation well, and the underground water enters the gas-water displacer.
And 6, injecting gas into the gas-water displacer, and discharging water from the gas-water displacer. And in the gas injection time, the PLC control cabinet sends signals to the gas distribution valve to control the first port and the second port of the gas distribution valve to be opened and the third port to be closed so as to communicate the upper gas distribution pipe with the lower gas distribution pipe, and compressed gas is conveyed from the screw air compressor to the gas-water displacer through the main gas pipe, the lower gas distribution pipe and the upper gas distribution pipe. After the compressed gas is conveyed to the gas-water displacer, an automatic door of a water inlet of the gas-water displacer is closed under pressure, and meanwhile, underground water in the gas-water displacer enters a drain pipe under pressure and is conveyed to a drain pipe through the drain pipe.
And repeating the step 5 and the step 6 until the precipitation project is finished.
And 7, closing the pneumatic precipitation device. After the dewatering project is finished, the dewatering device is turned off through a switch on the PLC control cabinet, the PLC control cabinet controls the pressure sensor, the screw air compressor and the Roots blower to be turned off at first, and finally the PLC control cabinet is turned off.
The utility model discloses have following beneficial effect at least: (1) the utility model provides a pneumatic precipitation device for accelerating water collection by utilizing negative pressure, which can accelerate the water collection speed of a precipitation well, increase the precipitation amount, improve the overall precipitation efficiency and shorten the precipitation period; (2) the pneumatic dewatering device automatically operates without manual inspection and frequent switching on and off of an electric brake, so that the labor cost is reduced; (3) the pneumatic precipitation device can realize continuous precipitation, and the operation is not influenced by the waterless idle running in the precipitation well; (4) the pneumatic precipitation device is simple and convenient to operate, time-saving, labor-saving and high in precipitation speed.
Although some embodiments of the present invention have been described in the present document, it will be obvious to those skilled in the art that these embodiments are shown by way of example only. Numerous variations, substitutions and modifications will occur to those skilled in the art without departing from the scope of the invention. It is intended that the following claims define the scope of the invention and that methods and structures within the scope of these claims and their equivalents be covered thereby.
Claims (8)
1. A pneumatic precipitation device for accelerating water collection by using negative pressure, comprising:
the well sealing cover seals a wellhead of the dewatering well, and the top of the well sealing cover is provided with a plurality of through holes;
the PLC control cabinet is positioned outside the sealed well cover;
the Roots blower is electrically connected with the PLC control cabinet;
the air exhaust pipe is connected with the Roots blower and extends into the precipitation well through the through hole;
the pressure sensor is electrically connected with the PLC control cabinet;
the screw air compressor is in signal connection with the PLC control cabinet;
one end of the main air pipe is connected with the screw air compressor, and the other end of the main air pipe extends into the PLC control cabinet;
the upper end of the upper gas distributing pipe extends into the PLC control cabinet and is connected with the main gas pipe;
the gas distribution valve is connected with the upper gas distribution pipe;
the lower gas distribution pipe is connected with the gas distribution valve and extends into the precipitation well through the through hole;
the gas-water displacer is positioned at the bottom of the dewatering well and is connected with the lower gas distribution pipe; and
and the water drain pipe penetrates through the through hole and is connected with the air-water displacer.
2. The pneumatic water-collecting accelerating device with negative pressure as claimed in claim 1, wherein the top of the gas-water displacer is provided with a gas inlet and a water outlet;
the air inlet of the air-water displacer is connected with the lower gas distribution pipe;
the water drainage pipe is connected with a water outlet of the gas-water displacer;
the side wall of the gas-water displacer is provided with a water inlet, and the water inlet is provided with an automatic door.
3. The pneumatic water collecting device with the negative pressure acceleration function of the claim 1 is characterized in that a pipeline or equipment is placed in the precipitation well through a plurality of through holes on the top of the sealing well cover, and gaps of the through holes are sealed by structural adhesive;
the wellhead of dewatering well is provided with bentonite, the side of sealed well casing at least part inserts bentonite.
4. The pneumatic water-collecting device with the negative pressure acceleration as recited in claim 1, wherein the air suction pipe below the sealed well cover is a slotted or screened air suction pipe, and has a plurality of air inlets;
the bottom end of the extraction pipe is positioned above the water surface of the groundwater in the dewatering well.
5. The pneumatic precipitation device for accelerated water collection by negative pressure as claimed in claim 1, wherein the injection time and the deflation time of the compressed gas and the pressure range in the precipitation well are set by the PLC control cabinet.
6. The pneumatic precipitation device using negative pressure to accelerate water collection according to claim 2, wherein the pressure sensor has a probe, a transmitter, and a line connecting the probe and the transmitter, wherein the probe and the line extend into the precipitation well through the through hole, and the probe is located above the surface of the groundwater in the precipitation well.
7. The pneumatic water-collecting accelerating precipitation device with negative pressure as claimed in claim 2, wherein said PLC control cabinet sends a signal to said screw air compressor to control the start and stop of said screw air compressor;
the screw air compressor is configured to generate a compressed gas.
8. The pneumatic water-collecting acceleration device with negative pressure as claimed in claim 7, wherein the air-distributing valve is a three-way valve having a first port, a second port and a third port, wherein the first port is connected with the lower end of the upper air-distributing pipe, the second port is connected with the upper end of the lower air-distributing pipe, and the third port is used for communicating with the atmosphere;
and the gas distributing valve is in signal connection with the PLC control cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220092740.2U CN217150166U (en) | 2022-01-14 | 2022-01-14 | Pneumatic precipitation device for accelerating water collection by utilizing negative pressure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220092740.2U CN217150166U (en) | 2022-01-14 | 2022-01-14 | Pneumatic precipitation device for accelerating water collection by utilizing negative pressure |
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| CN217150166U true CN217150166U (en) | 2022-08-09 |
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