CN112127355A - Tesla valve type drain board and manufacturing method and application thereof - Google Patents

Tesla valve type drain board and manufacturing method and application thereof Download PDF

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Publication number
CN112127355A
CN112127355A CN202011139011.XA CN202011139011A CN112127355A CN 112127355 A CN112127355 A CN 112127355A CN 202011139011 A CN202011139011 A CN 202011139011A CN 112127355 A CN112127355 A CN 112127355A
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China
Prior art keywords
tesla valve
air
drainage
tesla
branch pipe
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CN202011139011.XA
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Chinese (zh)
Inventor
杨振宇
陈秋南
谢云鹏
黄小城
贺泳超
杨蒙
许笑翟
赵军升
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Hunan University of Science and Technology
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Hunan University of Science and Technology
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Priority to CN202011139011.XA priority Critical patent/CN112127355A/en
Publication of CN112127355A publication Critical patent/CN112127355A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/022—Melting the material to be shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/14—Copolymers of polypropylene

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

The invention discloses a Tesla valve type drainage plate which comprises an air source device, wherein the air source device is connected with a drainage plate core through an air source gas pipe and a flow divider, the drainage plate core and a filter membrane form a complex, drainage grooves are formed on the outer wall surfaces of two sides of the drainage plate core, Tesla valves are vertically arranged in the drainage plate core corresponding to the drainage grooves, the bottoms of the drainage grooves are asymmetrically provided with holes, an air inlet is arranged at the top of each Tesla valve, an air guide channel is arranged in each Tesla valve, an air hole is formed in the outer wall of each air guide channel and connected with one end of a branch pipe with a reverse membrane, and the other end of each branch pipe is bonded with a hole in the bottom. The gas flow enters from the Tesla valve in the positive direction, is accelerated by the Tesla valve and is sprayed out from a copolymerization propylene branch pipe port with a reverse film; the air flow sprayed out with higher speed acts on the soil particles blocking the drainage grooves and the filter membrane through the asymmetric small holes on the drainage plate, has a pushing effect on the soft clay particles on the drainage plate, and solves the problem that the drainage grooves are easy to be sunk due to the weak lateral pressure resistance of the filter membrane.

Description

Tesla valve type drain board and manufacturing method and application thereof
Technical Field
The invention relates to the technical field of civil engineering, in particular to a Tesla valve type drainage plate and a manufacturing method and application thereof.
Background
Drainage plates for soft ground consolidation have been widely used in soft ground treatment and reclamation works. However, in the construction process, the filter membrane is partially separated from the drainage plate due to the insertion operation of the plate inserting machine during construction, and soft soil easily enters the drainage plate core from the separation area, so that the plate core is blocked. And secondly, the filter membrane is only simply coated on the surface of the drainage plate core, and the tightening force of the filter membrane is poor, so that the lateral pressure resistance of the filter membrane is weak, depressions are easily generated at all drainage grooves, the water flow of the drainage plate is reduced due to the depressions of the filter membrane, and the solidification speed and the solidification effect of the sludge are influenced. Finally, the soft soil particles are extremely fine and have high viscosity, and small particles are easy to gather near the vertical drainage plate along with the seepage of pore water and form a hard sludge layer on the surface, so that the drainage plate is seriously clogged, and the problems of low post-treatment efficiency, unobvious treatment effect and the like are caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a Tesla valve type drainage plate which is simple in structure, safe and reliable, and provides a manufacturing method and application of the drainage plate in reinforcing soft foundation.
The technical scheme for solving the problems is as follows: a Tesla valve type drain board comprises an air source device, Tesla valves, branch pipes, a drain board core and filter membranes, wherein the air source device is connected with inlets of a plurality of flow dividers through an air source gas conveying pipe, an outlet of each flow divider is connected with one drain board core, the filter membranes are arranged outside the drain board cores, the drain board cores and the filter membranes form a complex body, a plurality of partition boards are arranged on the outer wall surfaces of two sides of each drain board core so as to form a plurality of drain grooves, a Tesla valve is vertically arranged in each drain groove corresponding to the inner part of each drain groove, the bottoms of the drain grooves on two sides of each drain board core are asymmetrically provided with holes, the top of each Tesla valve is provided with an air inlet, an air guide channel is arranged in each Tesla valve, an air hole is formed in the outer wall of the air guide channel, the air hole is connected with one end of each branch pipe; the air source device intermittently transmits air to the Tesla valve through the air source air transmission pipe and the flow divider, and air flow enters from the air inlet of the Tesla valve and is sprayed out from the branch pipe along the air guide path.
According to the Tesla valve type drainage plate, the air guide channel inside the Tesla valve comprises the straight channel and the inclined channel, the top of the straight channel is communicated with the air inlet, the two sides of the straight channel are provided with the single wings in a staggered mode from top to bottom, the inclined channel is formed through the single wings, and the straight channel and the inclined channel are at a diversion angle of 30 degrees.
According to the Tesla valve type drain board, the core board of the drain board is prepared by mixing polypropylene and polyethylene, the filter membrane is made of long-fiber hot-rolled non-woven fabrics, and the Tesla valve and the branch pipe are made of copolymerized propylene.
In the tesla valve type drainage plate, the diameters of the straight channel and the inclined channel are 0.3cm, the diameter of the gas inlet of the tesla valve is 0.3cm, the width of a single wing is 0.5cm, the length of the branch pipe is 0.7cm, and the diameter of the outer wall hole of the drainage plate core is 0.3 cm.
In the Tesla valve type drainage plate, an air hole is formed at the position of 5-10cm downward extending of the bottom of each single wing of the Tesla valve, the air holes are arranged at an upward inclination angle of 45 degrees, and the diameter of each air hole is 0.3 cm.
In the Tesla valve type drain board, the gas source gas pipe is provided with the stop control valve.
A manufacturing method of a Tesla valve type drain board is characterized by comprising the following steps:
(1) and (3) forming a Tesla valve:
adding a copolymerized propylene raw material into a hot melting machine for melting, wherein the melting temperature is 150-176 ℃, the melting time is 8-10 minutes, the melted copolymerized propylene is filtered by a screen changing filter, and the flow of the screen changing filter is not less than that of a melt metering booster pump;
an isolation film is laid in advance on a Tesla valve model mould, the diversion angle of a straight channel and an inclined channel in the Tesla valve model is 30 degrees, the diameters of the straight channel and the inclined channel are 0.3cm, the wall thickness is 1mm, the width of a single wing is 0.5cm, each single wing extends downwards by 5-10cm, an air hole which is opened by 0.3cm upwards by 45 degrees is arranged on the outer side of an extension section, and a branch pipe with the length of 0.7cm is connected; the liquid-state copolymerization propylene is pumped into a mould for molding by a melt metering booster pump, and the molded Tesla valve is placed at room temperature for cooling;
(2) forming a drain board core:
mixing and blending polypropylene and polyethylene according to a ratio of 6:4, adding a hot melting machine for melting, wherein the melting temperature is 132-;
(3) and (3) preparing a finished product:
asymmetric holes are formed in each drainage groove on two sides of the drainage plate core, a Tesla valve is vertically arranged at the corresponding position of each drainage groove, an air hole of each Tesla valve is connected with one end of a branch pipe with a falling film, the branch pipe with the falling film and the hole are bonded by hot melting, after the drainage plate core and a Tesla valve framework are formed, the upper end and the lower end of the formed framework are sealed by liquid-state co-polypropylene, and an air inlet of the Tesla valve is reserved at the upper end.
In the manufacturing method of the Tesla valve type drain board, in the step (2), the extruder is a single-screw extruder, and the temperatures of the feeding section, the melting section and the metering section of the single screw are 135 +/-3 ℃.
The application of the Tesla valve type drainage plate in the aspect of reinforcing soft foundation specifically comprises the following steps:
site clearing and leveling: cleaning vegetation, garbage and obstacles in a construction area;
(II) laying a sand cushion layer: the soft foundation treatment sand cushion layer is used as a working cushion layer and a horizontal drainage cushion layer, and medium coarse sand with the grain diameter of 0.25-2.0 mm and the permeability coefficient not less than 5 multiplied by 10 is required to be adopted-3cm/s, mud content less than or equal to 5%, paving thickness more than 200mm, adoptingCarrying out work or mechanical operation and laying;
and (III) pouring a concrete cushion platform: pouring a concrete cushion table, wherein the thickness of the concrete cushion table is 10cm, so that the concrete cushion table can bear an air source device conveniently;
(IV) setting an air source device: placing an air source device on a concrete cushion table;
and (V) arranging a Tesla valve type drain plate: inserting the Tesla valve type drainage plates into a soft soil foundation by a plate inserting machine, wherein the insertion interval is 1m, the drainage plates are arranged in a quincunx shape, the plate ends are arranged on the bottom surface of a sludge layer in a beating mode, the upper ends of the drainage plates are exposed out of a sand cushion layer by 10-15cm, the exposed parts are arranged downwards in a bending mode, and the number of return belts is not more than 5% of the total beating number in the Tesla valve type drainage plate beating process;
(VI) drainage ditch construction: the size of the drainage ditch is determined according to the construction area;
(VII) connecting the air source device with the water discharging plate: connecting an air source device with the splitter by an air source gas pipe, and regulating and controlling by a stop control valve; the gas is divided by the flow divider and is input into a gas inlet of the Tesla valve;
(eighth) intermittent gas transmission: the air source device intermittently transmits air to the Tesla valve through the air source air transmission pipe and the flow divider, air flow enters from an air inlet of the Tesla valve and is sprayed out from the branch pipe along an air guide path, and the air flow pressure is maintained at 0.4MPa during intermittent air transmission.
The invention has the beneficial effects that:
1. the Tesla valve type drain board of the invention utilizes the characteristics that the Tesla valve can accelerate airflow in the forward direction and restrict backflow in the reverse direction: the gas flow enters from the Tesla valve in the positive direction, is accelerated by the Tesla valve and is sprayed out from a copolymerization propylene branch pipe port with a reverse film; the accelerated air flow acts on the soil particles and the filter membrane blocking the drainage groove through the asymmetric small holes on the drainage plate. The invention is designed aiming at the condition that the drainage plate is easy to be blocked due to small soft clay particles. The accelerated gas flow sprayed from the copolymerization propylene branch pipe plays two roles: firstly, soft clay particles on the drainage plate are pushed; secondly, the problem that the filter membrane is weak in lateral pressure resistance and is easy to generate depression at each drainage groove is solved. The falling film on the copolymerization propylene branch pipe can play a role of a human body venous valve, can ensure the one-way delivery of airflow, prevent the backflow of water in soil and prevent soil particles from blocking the copolymerization propylene branch pipe and the Tesla valve. It is suitable for soft soil foundation engineering.
2. The invention adopts the Tesla valve type drain board to reinforce the soft foundation, and can alleviate the problem that the drain board is easy to block the channel due to small soft clay particles in the later period. It is suitable for soft soil foundation engineering.
Drawings
Fig. 1 is a construction layout view of a tesla valve type drain board according to the present invention.
Fig. 2 is a perspective view of the tesla valve drain plate of the present invention.
Fig. 3 is a schematic cross-sectional view of a tesla valve drain plate of the present invention.
FIG. 4 is a schematic view of the process of reinforcing soft foundation according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1-3, a tesla valve type drain board comprises an air source device 1, tesla valves, branch pipes 13, a drain board core 8 and a filter membrane 9, wherein the air source device 1 is placed on a concrete cushion table 2, the air source device 1 is connected with inlets of a plurality of flow dividers 7 through air source air pipes 4, stop control valves 3 are arranged on the air source air pipes 4, an outlet of each flow divider 7 is connected with one drain board core 8, as shown in fig. 1, the flow dividers 7 and the drain board core 8 are bonded by hot melt adhesive and are in a ladder shape with the lower end larger than the upper end; the drainage plate core 8 is externally provided with a filter membrane 9, the drainage plate core 8 and the filter membrane 9 form a complex, the outer wall surfaces of two sides of the drainage plate core 8 are provided with a plurality of partition plates so as to form a plurality of drainage grooves, a tesla valve is vertically arranged in the drainage plate core 8 corresponding to each drainage groove, the bottoms of the drainage grooves on two sides of the drainage plate core are asymmetrically provided with holes 10, the top of the tesla valve is provided with an air inlet 11, an air guide channel is arranged in the tesla valve, the outer wall of the air guide channel is provided with an air hole, the air hole is connected with one end of a branch pipe 13 with a reverse membrane 14, and the other end of the branch pipe 13 is bonded with the holes 10; the air source device 1 intermittently transmits air to the Tesla valve through the air source air transmission pipe 4 and the flow divider 7, and air flow enters from the air inlet 11 of the Tesla valve and is sprayed out from the branch pipe 13 along an air guide path. The inverted membrane 14 can ensure the one-way delivery of air flow, prevent water in soil from flowing backwards and prevent soil particles from blocking the branch pipes 13.
The gas guide channel in the Tesla valve comprises a straight channel and an inclined channel, the top of the straight channel is communicated with a gas inlet 11, single wings 12 are arranged on two sides of the straight channel in a staggered mode from top to bottom, the inclined channel is formed through the single wings 12, and the straight channel and the inclined channel form a 30-degree diversion angle.
The drain board core 8 is prepared by mixing polypropylene and polyethylene, the filter membrane 9 is made of long-fiber hot-rolled non-woven fabrics, and the Tesla valve and the branch pipe 13 are made of propylene copolymer.
The diameters of the straight channel and the inclined channel are 0.3cm, the diameter of the gas inlet 11 of the Tesla valve is 0.3cm, the width of the single wing 12 is 0.5cm, the length of the branch pipe 13 is 0.7cm, and the diameter of the outer wall hole 10 of the drainage plate core 8 is 0.3 cm.
The bottom of each single wing 12 of the Tesla valve extends downwards for 5-10cm and is provided with an air hole, the air hole is inclined upwards for 45 degrees, and the diameter of the air hole is 0.3 cm.
As shown in figure 3, the two sides of the drainage channel of the drainage plate core 8 are provided with small holes 10 with the diameter of 0.3cm at intervals of 5-10cm, the small hole at one side corresponds to the branch pipe at the left side of the Tesla valve, and the small hole at the other side corresponds to the branch pipe at the right side of the Tesla valve.
A manufacturing method of a Tesla valve type drain board is characterized by comprising the following steps:
(1) and (3) forming a Tesla valve:
adding a copolymerized propylene raw material into a hot melting machine for melting, wherein the melting temperature is 150-176 ℃, the melting time is 8-10 minutes, the melted copolymerized propylene is filtered by a screen changing filter, and the flow of the screen changing filter is not less than that of a melt metering booster pump;
an isolation film is laid in advance on a Tesla valve model mould, the diversion angle of a straight channel and an inclined channel in the Tesla valve model is 30 degrees, the diameter of the straight channel and the diameter of the inclined channel are 0.3cm, the wall thickness of the straight channel and the wall thickness of the inclined channel are both 1mm, the width of each single wing 12 is 0.5cm, each single wing 12 extends downwards by 5-10cm, an air hole which is 0.3cm and is upwards opened by 45 degrees is arranged on the outer side of the extending section, and a branch pipe 13 with the length of 0.7cm is connected; the liquid-state copolymerization propylene is pumped into a mould for molding by a melt metering booster pump, and the molded Tesla valve is placed at room temperature for cooling;
(2) and (3) forming the drain board core 8:
mixing and blending polypropylene and polyethylene according to a ratio of 6:4, adding the mixture into a hot melting machine for melting at the melting temperature of 132-. The mixture extruded by the extruder is formed into sheets through a coat hanger type die head, and then is formed through vacuum adsorption of a drainage plate rolling and absorbing machine, and the formed drainage plate core 8 is placed in normal temperature water for cooling;
(3) and (3) preparing a finished product:
the method comprises the steps of asymmetrically opening holes 10 in two side plates of a drain plate core 8, placing a Tesla valve in each drain groove of the drain plate core 8, connecting an air hole of the Tesla valve with one end of a branch pipe 13 with a reversed membrane 14, thermally melting and bonding the branch pipe 13 with the hole 10 with the reversed membrane 14, after the drain plate core 8 and a Tesla valve framework are formed, plugging the upper end and the lower end of the formed framework by liquid copolymerized propylene, and leaving a Tesla valve air inlet 11 at the upper end.
As shown in figure 4, the sand cushion horizontal and tesla valve type drainage plate vertical drainage system is arranged, water in bottom sludge slowly enters the sand cushion through the pores and is discharged transversely, then the water is drained through the tesla valve type drainage plate vertically, the pore volume is reduced slowly, the foundation is solidified and deformed, the effective stress is gradually improved, and the strength of the foundation soil is gradually increased. The application of the Tesla valve type drainage plate in the aspect of reinforcing soft foundation specifically comprises the following steps:
site clearing and leveling: cleaning vegetation, garbage and obstacles in a construction area;
and (II) paving a sand cushion layer 5: the soft foundation treatment sand cushion 5 is used as a working cushion and a horizontal drainage cushion, and requires medium coarse sand with the grain diameter of 0.25-2.0 mm and the permeability coefficient not less than 5 multiplied by 10-3cm/s, the mud content is less than or equal to 5 percent, the paving thickness is more than 200mm, and the paving is carried out manually or mechanically according to the construction area;
and (III) pouring a concrete cushion platform 2: pouring the concrete cushion table 2 according to the bottom area of the air source device 1, wherein the thickness of the concrete cushion table 2 is 10cm, so that the air source device 1 can be conveniently borne;
(IV) setting an air source device 1: placing an air source device 1 on a concrete cushion table 2;
and (V) arranging a Tesla valve type drain plate: inserting the Tesla valve type drainage plates into a soft soil foundation by a plate inserting machine, wherein the insertion interval is 1m, the drainage plates are arranged in a quincunx shape, the plate ends are arranged on the bottom surface of a sludge layer in a beating mode, the upper ends of the drainage plates are exposed out of a sand cushion layer by 510-15cm, the exposed parts are arranged downwards in a bending mode, and the number of return belts is not more than 5% of the total beating number in the Tesla valve type drainage plate beating process;
and (VI) constructing a drainage ditch 6: the size of the drainage ditch 6 is determined according to the construction area;
(VII) connecting the air source device 1 with the drain board: the air source device 1 is connected with the flow divider 7 through an air source air delivery pipe 4 and is regulated and controlled through the stop control valve 3; the flow divider 7 divides the gas and inputs the gas into a gas inlet 11 of the Tesla valve;
(eighth) intermittent gas transmission: the air source device 1 intermittently transmits air to the Tesla valve through the air source air transmission pipe 4 and the flow divider 7, air flow enters from the air inlet 11 of the Tesla valve and is sprayed out from the branch pipe 13 along the air guide path, and the air flow pressure is maintained at 0.4MPa during intermittent air transmission.

Claims (9)

1. A Tesla valve type drain board, which is characterized in that: the air source device is connected with inlets of a plurality of flow dividers through an air source gas pipe, an outlet of each flow divider is connected with a drain plate core, the filter membrane is arranged outside the drain plate core, the drain plate core and the filter membrane form a complex, the outer wall surfaces of two sides of the drain plate core are provided with a plurality of partition plates so as to form a plurality of drain grooves, a Tesla valve is vertically arranged in the drain plate core corresponding to each drain groove, the bottoms of the drain grooves on two sides of the drain plate core are asymmetrically provided with holes, the top of the Tesla valve is provided with an air inlet, an air guide channel is arranged in the Tesla valve, the outer wall of the air guide channel is provided with an air hole, the air hole is connected with one end of the branch pipe with the inverted membrane, and the other end of the branch pipe is bonded with the hole at the bottom of the drain groove; the air source device intermittently transmits air to the Tesla valve through the air source air transmission pipe and the flow divider, and air flow enters from the air inlet of the Tesla valve and is sprayed out from the branch pipe along the air guide path.
2. A tesla valve drain plate according to claim 1, wherein: the gas guide channel in the Tesla valve comprises a straight channel and an inclined channel, the top of the straight channel is communicated with a gas inlet, single wings are arranged on two sides of the straight channel in a staggered mode from top to bottom, the inclined channel is formed through the single wings, and the straight channel and the inclined channel form a 30-degree diversion angle.
3. A tesla valve drain plate according to claim 2, wherein: the core plate of the drainage plate is prepared by mixing polypropylene and polyethylene, the filter membrane is made of long-fiber hot-rolled non-woven fabrics, and the Tesla valve and the branch pipe are made of copolymerized propylene.
4. A tesla valve drain plate according to claim 3, wherein: the diameters of the straight channel and the inclined channel are 0.3cm, the diameter of an air inlet of the Tesla valve is 0.3cm, the width of a single wing is 0.5cm, the length of a branch pipe is 0.7cm, and the diameter of an outer wall hole of the drainage plate core is 0.3 cm.
5. A Tesla valve style drain plate according to claim 4, wherein: the bottom of each single wing of the Tesla valve extends downwards for 5-10cm and is provided with an air hole, the air hole is inclined upwards for 45 degrees, and the diameter of the air hole is 0.3 cm.
6. A tesla valve drain plate according to claim 1, wherein: and a stop control valve is arranged on the gas source gas conveying pipe.
7. A method of making a tesla valve drain plate as defined in claim 5, comprising the steps of:
(1) and (3) forming a Tesla valve:
adding a copolymerized propylene raw material into a hot melting machine for melting, wherein the melting temperature is 150-176 ℃, the melting time is 8-10 minutes, the melted copolymerized propylene is filtered by a screen changing filter, and the flow of the screen changing filter is not less than that of a melt metering booster pump;
an isolation film is laid in advance on a Tesla valve model mould, the diversion angle of a straight channel and an inclined channel in the Tesla valve model is 30 degrees, the diameters of the straight channel and the inclined channel are 0.3cm, the wall thickness is 1mm, the width of a single wing is 0.5cm, each single wing extends downwards by 5-10cm, an air hole which is opened by 0.3cm upwards by 45 degrees is arranged on the outer side of an extension section, and a branch pipe with the length of 0.7cm is connected; the liquid-state copolymerization propylene is pumped into a mould for molding by a melt metering booster pump, and the molded Tesla valve is placed at room temperature for cooling;
(2) forming a drain board core:
mixing and blending polypropylene and polyethylene according to a ratio of 6:4, adding a hot melting machine for melting, wherein the melting temperature is 132-;
(3) and (3) preparing a finished product:
asymmetric holes are formed in each drainage groove on two sides of the drainage plate core, a Tesla valve is vertically arranged at the corresponding position of each drainage groove, an air hole of each Tesla valve is connected with one end of a branch pipe with a falling film, the branch pipe with the falling film and the hole are bonded by hot melting, after the drainage plate core and a Tesla valve framework are formed, the upper end and the lower end of the formed framework are sealed by liquid-state co-polypropylene, and an air inlet of the Tesla valve is reserved at the upper end.
8. The manufacturing method of a tesla valve type drain board according to claim 7, wherein in the step (2), the extruder is a single screw extruder, and the temperature of the feeding section, the melting section and the metering section of the single screw is 135 plus or minus 3 ℃.
9. Use of a tesla valve drainage plate according to claim 6 for reinforcing weak foundations, in particular comprising the following steps:
site clearing and leveling: cleaning vegetation, garbage and obstacles in a construction area;
(II) laying a sand cushion layer: the soft foundation treatment sand cushion layer is used as a working cushion layer and a horizontal drainage cushion layer, and medium coarse sand with the grain diameter of 0.25-2.0 mm and the permeability coefficient not less than 5 multiplied by 10 is required to be adopted-3cm/s, the mud content is less than or equal to 5 percent, the paving thickness is more than 200mm, and manual or mechanical operation is adopted for paving;
and (III) pouring a concrete cushion platform: pouring a concrete cushion table, wherein the thickness of the concrete cushion table is 10cm, so that the concrete cushion table can bear an air source device conveniently;
(IV) setting an air source device: placing an air source device on a concrete cushion table;
and (V) arranging a Tesla valve type drain plate: inserting the Tesla valve type drainage plates into a soft soil foundation by a plate inserting machine, wherein the insertion interval is 1m, the drainage plates are arranged in a quincunx shape, the plate ends are arranged on the bottom surface of a sludge layer in a beating mode, the upper ends of the drainage plates are exposed out of a sand cushion layer by 10-15cm, the exposed parts are arranged downwards in a bending mode, and the number of return belts is not more than 5% of the total beating number in the Tesla valve type drainage plate beating process;
(VI) drainage ditch construction: the size of the drainage ditch is determined according to the construction area;
(VII) connecting the air source device with the water discharging plate: connecting an air source device with the splitter by an air source gas pipe, and regulating and controlling by a stop control valve; the gas is divided by the flow divider and is input into a gas inlet of the Tesla valve;
(eighth) intermittent gas transmission: the air source device intermittently transmits air to the Tesla valve through the air source air transmission pipe and the flow divider, air flow enters from an air inlet of the Tesla valve and is sprayed out from the branch pipe along an air guide path, and the air flow pressure is maintained at 0.4MPa during intermittent air transmission.
CN202011139011.XA 2020-10-22 2020-10-22 Tesla valve type drain board and manufacturing method and application thereof Pending CN112127355A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112879050A (en) * 2021-02-10 2021-06-01 中国电建集团成都勘测设计研究院有限公司 Waterproof structure of drainage type tunnel primary support system and construction method thereof
CN113620480A (en) * 2021-10-12 2021-11-09 江苏林康高新技术有限公司 Industrial sewage treatment device with self-cleaning function
CN114458648A (en) * 2022-01-04 2022-05-10 陕西嘉合顺泰能源科技有限公司 Hydraulic system parallel connection device based on Tesla valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112879050A (en) * 2021-02-10 2021-06-01 中国电建集团成都勘测设计研究院有限公司 Waterproof structure of drainage type tunnel primary support system and construction method thereof
CN113620480A (en) * 2021-10-12 2021-11-09 江苏林康高新技术有限公司 Industrial sewage treatment device with self-cleaning function
CN113620480B (en) * 2021-10-12 2021-12-24 江苏林康高新技术有限公司 Industrial sewage treatment device with self-cleaning function
CN114458648A (en) * 2022-01-04 2022-05-10 陕西嘉合顺泰能源科技有限公司 Hydraulic system parallel connection device based on Tesla valve
CN114458648B (en) * 2022-01-04 2024-02-06 陕西嘉合顺泰能源科技有限公司 Hydraulic system parallel connection device based on Tesla valve

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