CN217325436U - Positive and negative pressure combined dewatering well structure with self-cleaning function - Google Patents
Positive and negative pressure combined dewatering well structure with self-cleaning function Download PDFInfo
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- CN217325436U CN217325436U CN202121319162.3U CN202121319162U CN217325436U CN 217325436 U CN217325436 U CN 217325436U CN 202121319162 U CN202121319162 U CN 202121319162U CN 217325436 U CN217325436 U CN 217325436U
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Abstract
本实用新型公开了一种带自清洗功能的正负压联合降水井结构，排水管上设置有排水孔；真空泵连通至抽水管，所述空压泵连通至空压管，抽水管和空压管上部还连通有调节管，所述调节管与抽水管之间还设置有B阀，调节管与空压管之间还设置有A阀；所述空压管上还设置有D阀，所述抽水管上还设置有C阀，所述抽水管和空压管深入排水管内。本申请可通过调节降水井中水位上方的正负压来调节不同土层的降水效率；本申请具有清洗功能，采用管中管的设计，在外管被堵塞的情况下，通过加大内、外管之间水位上方的气压，同时利用活塞冲击内管中的水位，使水流冲向外管的排水孔，从而冲刷土工布上的砂土，实现降水井的清洗，提高清洗效率。
The utility model discloses a positive and negative pressure combined dewatering well structure with a self-cleaning function. A drainage pipe is provided with a drainage hole; a vacuum pump is connected to a water suction pipe, the air pressure pump is connected to an air pressure pipe, and the water suction pipe and the air pressure pipe are connected to the vacuum pump. The upper part of the pipe is also connected with a regulating pipe, a B valve is also arranged between the regulating pipe and the water pumping pipe, and an A valve is also arranged between the regulating pipe and the air pressure pipe; the air pressure pipe is also provided with a D valve, so The water suction pipe is also provided with a C valve, and the water suction pipe and the air pressure pipe go deep into the drainage pipe. The application can adjust the precipitation efficiency of different soil layers by adjusting the positive and negative pressure above the water level in the dewatering well; the application has a cleaning function, and adopts the design of the pipe in the pipe. When the outer pipe is blocked, by increasing the inner and outer pipes At the same time, the piston is used to impact the water level in the inner pipe, so that the water flow rushes to the drainage hole of the outer pipe, thereby scouring the sand on the geotextile, realizing the cleaning of the dewatering well and improving the cleaning efficiency.
Description
Technical Field
The utility model relates to a civil engineering field, concretely relates to take positive negative pressure of self-cleaning function to unite precipitation well structure.
Background
In the process of excavation construction of the foundation pit, a dewatering well needs to be arranged in the foundation pit and/or around the foundation pit so as to reduce the underground water level of the foundation pit and ensure the construction safety.
Current precipitation well generally includes the well casing, and supreme real pipeline section, filter tube section and the last real pipeline section of being in proper order down are followed to the well casing, and filter tube section outsourcing one deck nylon wire is filled with the filter material around the well casing, and during precipitation, groundwater around the precipitation well gets into the well casing through the filter material and from the filter tube section, and filter material and filter tube have the effect of filtering silt, and the time is of a specified duration, and filter material and filter tube are blockked up by silt easily, block up even, influence the precipitation of precipitation well.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model aims at providing a positive negative pressure of taking self-cleaning function unites precipitation well structure that can regularly carry out precipitation washing, prevent blockking up.
In order to realize the technical purpose, the utility model discloses a scheme is: the positive-negative pressure combined dewatering well structure with the self-cleaning function comprises a drainage pipe, a vacuum pump and an air compression pump, wherein more than two drainage holes are formed in the drainage pipe;
the vacuum pump is communicated with a water pumping pipe, the air compression pump is communicated with an air compression pipe, the upper parts of the water pumping pipe and the air compression pipe are also communicated with an adjusting pipe, a valve B is also arranged between the adjusting pipe and the water pumping pipe, and a valve A is also arranged between the adjusting pipe and the air compression pipe;
still be provided with the D valve on the air compression pipe, still be provided with the C valve on the drinking-water pipe, drinking-water pipe and air compression pipe are gone deep into in the drain pipe.
Preferably, the drain pipe comprises an inner pipe and an outer pipe, the diameter of the outer pipe is 2-3 times that of the inner pipe, and the water pumping pipe and the air pressure pipe are located in a space between the outer pipe and the inner pipe.
Preferably, the lower half sections 1/4-1/5 of the inner pipe are provided with inner drainage parts provided with drainage holes, and the rest parts of the inner pipe are inner sealing parts; the lower half sections 3/4-4/5 of the outer pipe are outer drainage parts provided with drainage holes, and the rest of the outer pipe is an outer sealing part; and a pull rod piston is also arranged in the inner pipe.
Preferably, a graduated scale is further arranged on the pull rod piston.
Preferably, the drain pipe is installed in the precipitation well, the suction pipe air pressure pipe is deep into below the liquid level of the precipitation well, and the adjusting pipe is located above the liquid level of the precipitation well.
Preferably, the piston structure on the pull rod piston is matched with the diameter of the inner pipe.
The beneficial effects of the utility model are that the precipitation efficiency of different soil layers can be adjusted by adjusting the positive and negative pressure above the water level in the precipitation well; the device has a cleaning function, adopts the design of the pipe-in-pipe, and under the condition that the outer pipe is blocked, air pressure above the water level between the inner pipe and the outer pipe is increased, and simultaneously, the piston impacts the water level in the inner pipe to enable water flow to impact the drain hole of the outer pipe, so that sand on the geotextile is washed, the cleaning of the dewatering well is realized, and the cleaning efficiency is improved; the rising and the falling speed of accessible observation pull rod piston scale judge precipitation efficiency and the decline condition of water level, and is simple convenient, has improved the efficiency of precipitation construction, reduces construction cost.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the drain pipe of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, the embodiment of the present invention is a positive and negative pressure combined dewatering well structure with a self-cleaning function, which comprises a drainage pipe 1, a vacuum pump 2 and an air-pressure pump 3, wherein the drainage pipe 1 is provided with more than two drainage holes 4; the drainage pipe 1 goes deep into the precipitation well 12,
the vacuum pump 2 is communicated with a water pumping pipe 5, the air pressure pump 3 is communicated with an air pressure pipe 6, the upper parts of the water pumping pipe 5 and the air pressure pipe 6 are also communicated with an adjusting pipe 7, a valve B8 is also arranged between the adjusting pipe 7 and the water pumping pipe 5, and a valve A9 is also arranged between the adjusting pipe 7 and the air pressure pipe 6;
still be provided with D valve 10 on the air compression pipe 6, still be provided with C valve 11 on the drinking-water pipe 5, drinking-water pipe 5 and air compression pipe 6 are gone deep into in the drain pipe 1.
The water discharge pipe 1 comprises an inner pipe 101 and an outer pipe 102, the diameter of the outer pipe 101 is 2-3 times that of the inner pipe 102, and the water suction pipe 1 and the air pressure pipe 6 are located in a space between the outer pipe 101 and the inner pipe 102;
the lower half sections 1/4-1/5 of the inner pipe 102 are provided with inner drainage parts with drainage holes, and the rest parts of the inner pipe 102 are inner sealing parts; the lower half sections 3/4-4/5 of the outer pipe 201 are provided with an outer drainage part with a drainage hole, and the rest part of the outer pipe is an outer sealing part; a pull rod piston 12 is also arranged in the inner pipe. A graduated scale is also arranged on the pull rod piston 12.
The drainage pipe 1 is installed in the precipitation well 13, the air pressure pipe of the water pumping pipe 5 is deeply inserted below the liquid level of the precipitation well 13, and the adjusting pipe 6 is located above the liquid level of the precipitation well 13. The piston structure on the pull rod piston 12 matches the diameter of the inner tube 102.
When the dewatering well is installed, the inner pipe and the outer pipe of the dewatering well are manufactured according to a conventional method, and the dewatering well comprises a non-drainage pipe and a drainage pipe, wherein holes are not formed on the surface of the non-drainage pipe, and drainage holes are formed on the surface of the drainage pipe; the inner pipe is provided with a drainage section at the bottommost part; when the drainage pipe is used, the multiple sections of drainage pipes are welded below the non-drainage pipe, the inner pipe is sleeved in the outer pipe, the lengths of the inner pipe and the outer pipe are consistent, and the inner pipe and the outer pipe are welded at the bottom through steel plates to form a bottom seal (as shown in figure 1). After the dewatering well is installed, the outer layer is wrapped with three layers of geotextiles to prevent sand and stone from entering the dewatering well. And hoisting and lowering the dewatering well to the excavated hole site, backfilling broken stones in the drainage section, and backfilling cohesive soil in the non-drainage section at the top. The water pumping pipe, the air compressing pipe and the adjusting pipe are arranged between the inner pipe and the outer pipe of the dewatering well, the pipe opening between the inner pipe and the outer pipe is sealed, the inner pipe is provided with a piston with a pull rod, and the surface of the piston with the pull rod is provided with scales.
When in use, the method comprises the following specific operations:
s1, only opening the valve C and the valve D, communicating an air pressure pipe and a water pumping pipe at the bottom of the dewatering well, simultaneously operating an air pressure pump and a vacuum pump, pressing high-pressure gas into the air pressure pipe by the air pressure pump, and forming a water-vapor mixture at the communication position of the two pipes;
s2, when the water levels of the precipitation well and the precipitation well inner pipe are reduced, the atmospheric pressure drives the pull rod piston to automatically slide downwards, and the water level reduction depth and the precipitation speed are judged by observing the change of scales on the pull rod;
s3, when the water level in the dewatering well is obviously reduced and the ground water level is basically unchanged, and the pull rod piston is continuously accelerated to sink and the ground water level is unchanged, judging that the outer geotechnical cloth of the dewatering well is filled with sandy soil, and cleaning the dewatering well;
cleaning: stopping pumping water, closing the valve B, the valve C and the valve D, starting the air pressure pump, applying positive pressure between the inner pipe and the outer pipe in the precipitation well, and simultaneously pressing down the pull rod piston discontinuously and rapidly to enable water in the precipitation well to be flushed out from the water drainage hole in the outer pipe and to flush sand on the geotextile on the outer layer of the outer pipe, and repeating the actions at least twice;
and (3) checking: closing the valve A, opening the valve B, the valve C and the valve D, starting a vacuum pump, starting pumping construction, if the underground water level is obviously reduced, indicating that the dewatering well is cleaned, if the underground water level is reduced at a low speed, stopping dewatering, and continuously repeating the above cleaning action.
For example, in a medium-thickness sand layer, the water collection efficiency of the dewatering well is higher than the water pumping efficiency. When the permeability of the soil layer around the dewatering well is good, when the water level in the dewatering well continuously rises and the pull rod piston automatically rises, the valve C, D and the valve A are opened at the moment, so that the air pump presses air into the space between the inner pipe and the outer pipe of the dewatering well through the adjusting pipe to form positive pressure above the water level, and meanwhile, the pull rod piston is pressed downwards to sink the pull rod piston, so that the pressure above the water level in the inner pipe is increased, and the water collection efficiency of the dewatering well is reduced to be matched with the water pumping efficiency of the vacuum pump.
For example, in mucky soil, the dewatering well has low water collection efficiency. When the permeability of the soil layer around the dewatering well is poor, the water collection efficiency of the dewatering well is low, the water pumping speed is higher than the water collection speed, the pull rod piston obviously accelerates to sink, the valve C, the valve D and the valve B are opened at the moment, the water pumping pipe pumps air above the water level between the inner pipe and the outer pipe of the dewatering well through the adjusting pipe to form negative pressure, and meanwhile, the pull rod piston is pulled upwards, so that the water collection efficiency of the dewatering well is reduced and the water pumping efficiency of the vacuum pump is matched.
The precipitation efficiency of different soil layers can be adjusted by adjusting the positive and negative pressure above the water level in the precipitation well; the device has a cleaning function, adopts the design of the pipe-in-pipe, and under the condition that the outer pipe is blocked, air pressure above the water level between the inner pipe and the outer pipe is increased, and simultaneously, the piston impacts the water level in the inner pipe to enable water flow to impact the drain hole of the outer pipe, so that sand on the geotextile is washed, the cleaning of the dewatering well is realized, and the cleaning efficiency is improved; the rising and the falling speed of accessible observation pull rod piston scale judge precipitation efficiency and the decline condition of water level, and is simple convenient, has improved the efficiency of precipitation construction, reduces construction cost.
The above, only do the preferred embodiment of the present invention, not used to limit the present invention, all the technical matters of the present invention should be included in the protection scope of the present invention for any slight modification, equivalent replacement and improvement of the above embodiments.
Claims (6)
1. The utility model provides a take positive negative pressure of self-cleaning function to unite precipitation well structure which characterized in that: the water pump comprises a drain pipe, a vacuum pump and an air compression pump, wherein more than two drain holes are formed in the drain pipe;
the vacuum pump is communicated with a water pumping pipe, the air pressure pump is communicated with an air pressure pipe, the upper parts of the water pumping pipe and the air pressure pipe are also communicated with an adjusting pipe, a valve B is also arranged between the adjusting pipe and the water pumping pipe, and a valve A is also arranged between the adjusting pipe and the air pressure pipe;
still be provided with the D valve on the air compression pipe, still be provided with the C valve on the drinking-water pipe, drinking-water pipe and air compression pipe are gone deep into in the drain pipe.
2. The positive and negative pressure combined dewatering well structure with the self-cleaning function according to claim 1, characterized in that: the water discharge pipe comprises an inner pipe and an outer pipe, the diameter of the outer pipe is 2-3 times that of the inner pipe, and the water pumping pipe and the air pressure pipe are located in a space between the outer pipe and the inner pipe.
3. The positive and negative pressure combined dewatering well structure with the self-cleaning function according to claim 2, characterized in that: the lower half sections 1/4-1/5 of the inner pipe are provided with inner drainage parts with drainage holes, and the rest parts of the inner pipe are inner sealing parts; the lower half sections 3/4-4/5 of the outer pipe are outer drainage parts provided with drainage holes, and the rest of the outer pipe is an outer sealing part; a pull rod piston is also arranged in the inner tube.
4. The positive and negative pressure combined dewatering well structure with the self-cleaning function according to claim 3, characterized in that: and a graduated scale is also arranged on the pull rod piston.
5. The positive and negative pressure combined dewatering well structure with the self-cleaning function according to claim 1, characterized in that: the drain pipe is installed in the precipitation well, the suction pipe air pressure pipe is deepened below the liquid level of precipitation well, the regulating pipe is located the liquid level top of precipitation well.
6. The positive and negative pressure combined dewatering well structure with the self-cleaning function according to claim 3, characterized in that: and the piston structure on the pull rod piston is matched with the diameter of the inner pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121319162.3U CN217325436U (en) | 2021-06-15 | 2021-06-15 | Positive and negative pressure combined dewatering well structure with self-cleaning function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121319162.3U CN217325436U (en) | 2021-06-15 | 2021-06-15 | Positive and negative pressure combined dewatering well structure with self-cleaning function |
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| CN217325436U true CN217325436U (en) | 2022-08-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113293785A (en) * | 2021-06-15 | 2021-08-24 | 中铁一局集团(广州)建设工程有限公司 | Positive and negative pressure combined dewatering well structure with self-cleaning function and construction method |
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- 2021-06-15 CN CN202121319162.3U patent/CN217325436U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113293785A (en) * | 2021-06-15 | 2021-08-24 | 中铁一局集团(广州)建设工程有限公司 | Positive and negative pressure combined dewatering well structure with self-cleaning function and construction method |
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Effective date of registration: 20251205 Granted publication date: 20220830 |