WO2016188136A1

WO2016188136A1 - Small-scale combined construction equipment for treating soft foundation

Info

Publication number: WO2016188136A1
Application number: PCT/CN2016/071965
Authority: WO
Inventors: 李云逸; 姜振波; 李永祥; 李仁�
Original assignee: 连云港倍力特科技发展有限公司
Priority date: 2015-05-27
Filing date: 2016-01-25
Publication date: 2016-12-01
Also published as: CN104846804A; SG11201709809PA; MY189916A; CN104846804B

Abstract

A small-scale combined construction equipment for treating soft foundations comprises several geomembrane outlets (2) for gas/water pumping on a geomembrane on soft soil foundations and comprises combined water pumping devices correspondingly connected to the geomembrane outlets (2). The combined water pumping devices comprise gas/water separation containers (5) and liquid-ring vacuum pumps (15), and the geomembrane outlets (2) are connected to the gas/water separation containers (5). A set of a check valve (12) and a cut-off valve (7) is disposed on each outlet connecting pipe. A submersible pump (4) is installed in the gas/water separation container (5). The construction equipment is small-sized and lightweight, has short connecting pipes, and saves energy.

Description

Small combined soft foundation treatment construction equipment

[0001] The present invention relates to a soft foundation treatment construction technique, and more particularly to a small combined soft foundation treatment construction apparatus.

Background technique

[0002] In the construction of soft soil foundation reinforcement, it is required to extract most of the moisture and gas in the soft soil foundation to make the compactness meet the requirements for use. At present, in the existing soft soil foundation reinforcement construction, three types of construction equipment are widely used: 1. Jet pump, the characteristics of this type of construction equipment are: 1. Moisture and gas in soft soil foundation, even solid matter of tiny particles Can be extracted, can achieve higher vacuum requirements (-0.096Mpa); 2, the equipment is light, the pipeline is short, the pressure loss is small; 3, the working efficiency is relatively low, especially the efficiency of pumping gas is only the power vacuum pump 30%, so the energy consumption is higher; Second, the vacuum pump, using this construction method, more use a larger power vacuum pump to implement a large area of soft soil foundation reinforcement construction, the characteristics of such equipment are: 1, pumping efficiency Higher, it can carry out reinforcement work on a wide range of soft soil foundations. Compared with the simple use of jet pumps, the unit construction area, less power consumption, and higher efficiency; 2. High demand for suction medium, or not allowed Inhalation by pumping liquid, or requiring the liquid to be pumped must be filtered multiple times. Even so, on the one hand, the liquid being sucked may corrode the pump ring, which is also difficult for such equipment. Bear, such a vacuum pump for sucking a liquid, the efficiency dropped significantly with this inches, substantially identical to the jet pump efficiency. 3. The vacuum pump has requirements on the gas pressure at the suction port. When the vacuum degree of the gas at the suction port reaches -0.090Mpa or higher, the working efficiency of such a vacuum pump is greatly reduced, and even the vacuum of the pumped space cannot be further improved. 3. A large-scale construction device for soft soil foundation treatment that has been tried. This device has the advantage of using vacuum pump construction. Compared with the simple use of the jet pump, the unit construction area consumes less power and has higher efficiency. However, the device is bulky and cumbersome and difficult to install on a soft soft soil foundation. Moreover, the connecting pipeline is long and complicated, the pipeline pressure loss is large, and there are many leakage accidents, and the actual vacuum degree in the construction area is low, so the construction effect is poor.

technical problem

[0003] The technical problem to be solved by the present invention is to address the deficiencies of the prior art, and propose a small and lightweight, full set The device is installed on the cover film, and the connection pipeline is extremely short, and the combined soft foundation treatment construction equipment can save energy.

Problem solution

Technical solution

[0004] The technical problem to be solved by the present invention is achieved by the following technical solution, a small combined soft ground processing construction equipment, comprising a plurality of air outlets of the pumping water disposed on the soft soil base film, The utility model is characterized in that: a combined air pumping device is provided, which is connected with the film outlet port, and the combined air pumping device comprises at least one gas water separating tank and one water ring vacuum pump, and the gas water separating tank and the water ring vacuum pump are close to each other. Installed on the soft soil base film near the film outlet, the film outlets are respectively connected with the interfaces provided around the gas-water separation tank, and a set of check valves and shut-off valves are arranged on each interface pipe; gas-water separation A submersible pump is installed in the tank. The drain port of the submersible pump is arranged outside the gas water separation tank. An air suction port is arranged at the upper part of the gas water separation tank, and the air suction port is connected to the air inlet of the water ring vacuum pump through the pipeline.

[0005] The technical problem to be solved by the present invention can be further achieved by the following technical solution: a buoyancy stop valve is arranged at the air suction port on the upper part of the gas water separation tank, and the air suction port of the upper part of the gas water separation tank is automatically distributed through the air pressure The device is connected to the suction port of the water ring vacuum pump; a check valve is arranged on the connecting line of the water ring vacuum pump suction port and the pneumatic automatic distributor; the pneumatic automatic distributor includes a parallel pressure control valve and an atmospheric jet The pump, the pressure control valve and the atmospheric jet pump are all controlled by the pressure in the gas-water separation tank. The negative pressure value in the gas-water separation tank is greater than the set negative pressure value 吋, the pressure control valve is in the snoring state, and the atmospheric jet pump is In the closed state, the pressure of the gas-water separation tank is in a low vacuum state, and the gas-water separation tank is evacuated through the snoring pressure control valve; the negative pressure value in the gas-water separation tank reaches a set negative pressure value 吋, pressure The control valve is closed, the atmospheric jet pump is snoring, and the gas-water separation tank is continuously evacuated by the atmospheric jet pump, so that the pressure in the gas-water separation tank reaches a high vacuum state.

The technical problem to be solved by the present invention can be further achieved by the following technical solution. The water ring vacuum pump is an air-cooled water ring vacuum pump that operates in the atmosphere.

[0007] The technical problem to be solved by the present invention can be further achieved by the following technical solution, the water ring vacuum pump is a submersible water ring vacuum pump disposed in a water tank; a water tank is disposed beside the gas water separation tank, the submersible water The ring vacuum pump is disposed in the water tank, and the drain port of the submersible pump is connected to the water tank through the drain line and the check valve. [0008] The technical problem to be solved by the present invention can be further achieved by the following technical solution, the power of the water ring vacuum pump is not more than 7.5 KW.

[0009] The technical problem to be solved by the present invention can be further achieved by the following technical solutions, wherein the pressure control valve and the atmospheric jet pump are both electromagnetic control on-off valves, and a negative pressure sensor is disposed on the gas-water separation tank. The control signal output from the negative pressure sensor is connected to the pressure control valve and the atmospheric jet pump through the control system.

[0010] The technical problem to be solved by the present invention can be further achieved by the following technical solution. The pressure control valve is a pneumatic bellows I, and the air suction port of the air pressure bellows I and the air suction port of the atmospheric jet pump are connected in parallel through the air suction pipe. The road is connected with the suction port of the submersible water ring vacuum pump, and the suction port of the air pressure membrane box I and the air suction port of the atmospheric jet pump are connected in parallel through the suction line to the suction port of the gas water separation tank, and the atmospheric jet pump is connected. The air inlet pipe is connected to the air suction pipe through the air pressure membrane box, and the air inlet pipe of the air jet pump is connected with the air outlet port of the air pressure membrane box, and the air outlet port of the air pressure diaphragm box passes through the branch road and the air pressure film. The outer cavity of the membrane of the cartridge I is in communication.

[0011] The technical problem to be solved by the present invention can be further realized by the following technical solutions. The submersible water ring vacuum pump is composed of a support, a submersible motor, a seal oil chamber and a water ring vacuum pump head, and the seal oil chamber adopts two layers. The oil chamber cavity is provided with a set of mechanical seals in each layer of the oil chamber cavity, and a set of mechanical seals are arranged in the water ring pump head, and the three sets of mechanical seals together ensure the pump shaft drive sealing performance.

[0012] The technical problem to be solved by the present invention can be further achieved by the following technical solution, wherein the low vacuum state is that the negative pressure value in the gas water separation tank is between 0 and -0.09 MPa.

[0013] The technical problem to be solved by the present invention can be further achieved by the following technical solution, wherein the high vacuum state is that the negative pressure value in the gas water separation tank is between -0.09 and 0.096 MPa.

Advantageous effects of the invention

Beneficial effect

[0014] Compared with the prior art, the submersible pump in the gas-water separation tank discharges the accumulated water in the tank from the soft soil foundation out of the tank. It is small and light, and the complete set is installed on the film. The connecting pipe is extremely short, which can save energy. The discharged groundwater is discharged from the pipeline to the membrane and in the lamination trench for ballasting; it can also be discharged into the water tank for the working fluid of the submersible water ring vacuum pump and the submersible motor for cooling. The vacuum in the gas-water separation tank is gradually increased to a high vacuum by the automatic air pressure distributor. Brief description of the drawing

DRAWINGS 1 is a schematic structural view of the present invention;

2 is a schematic diagram of the structure of a buoyancy stop valve;

[0017] FIG. 3 is a schematic diagram of a pneumatically controlled pneumatic automatic distributor;

[0018] FIG. 4 is a schematic diagram of an electronically controlled pneumatic automatic distributor;

[0019] FIG. 5 is a schematic structural view of a submersible water ring vacuum pump.

BEST MODE FOR CARRYING OUT THE INVENTION

The specific technical embodiments of the present invention are further described in the following with reference to the accompanying drawings, which are to be understood by those skilled in the art.

Embodiments of the invention

[0021] A small combined soft ground treatment construction equipment, comprising a plurality of air outlets of the pumping water disposed on the soft soil base film, and a combined air pumping device connected to the film outlet, The combined suction water device comprises at least one gas water separation tank and one water ring vacuum pump, and the gas water separation tank and the water ring vacuum pump are installed on the soft ground base film near the film outlet, and the film outlets are respectively separated from the gas. The interfaces provided around the water separation tank are connected, and a set of check valves and shut-off valves are arranged on each of the interface pipes; a submersible pump is installed in the gas-water separation tank, and the drain port of the submersible pump is disposed outside the gas-water separation tank An air suction port is arranged at an upper portion of the gas water separation tank, and the air suction port is connected to the air inlet of the water ring vacuum pump through a pipeline.

[0022] A buoyancy shut-off valve is arranged at the suction port on the upper part of the gas-water separation tank, and the suction port of the upper part of the gas-water separation tank is connected to the suction port of the water ring vacuum pump through the automatic air pressure distributor; A check valve is arranged on the connecting pipe of the air port and the pneumatic automatic distributor; the pneumatic automatic distributor includes a parallel pressure control valve and an atmospheric jet pump, and the pressure control valve and the atmospheric jet pump are all separated by the gas water separation tank. Pressure control, the negative pressure value in the gas-water separation tank is greater than the set negative pressure value 吋, the pressure control valve is in the snoring state, the atmospheric jet pump is in the closed state, and the pressure of the gas-water separation tank is in the low vacuum state. The pressure control valve of the snoring vacuums the gas-water separation tank; the negative pressure value in the gas-water separation tank reaches the set negative pressure value 吋, the pressure control valve is closed, the atmospheric jet pump is snoring, and the gas is continuously pumped through the atmospheric jet pump The water separation tank is evacuated to bring the pressure in the gas water separation tank to a high vacuum state.

[0023] The water ring vacuum pump is an air-cooled water ring vacuum pump that operates in the atmosphere. [0024] or the water ring vacuum pump is a submersible water ring vacuum pump disposed in the water tank; a water tank is disposed beside the gas water separation tank, the submersible water ring vacuum pump is disposed in the water tank, and the drain port of the submersible pump passes through the drain pipe The road and check valve are connected to the water tank. The submersible water ring vacuum pump is composed of a support, a submersible motor, a seal oil chamber and a water ring vacuum pump head. The seal oil chamber adopts two oil chamber chambers, and a set of mechanical seals are arranged in each oil chamber chamber. A set of mechanical seals is arranged in the pump head, and the three sets of mechanical seals together ensure the pump shaft drive sealing performance.

[0025] The power of the water ring vacuum pump is not more than 7.5 KW.

[0026] The pressure control valve and the atmospheric jet pump are both electromagnetic control opening and closing valves, and a negative pressure sensor is disposed on the gas water separation tank, and a control signal output by the negative pressure sensor passes through the control system and the pressure control valve and the atmospheric jet. The pumps are connected.

[0027] The pressure control valve is a gas pressure membrane box I, the air suction port of the air pressure membrane box I and the air suction port of the air jet pump are connected in parallel through the air suction line and the suction port of the submersible water ring vacuum pump, the air pressure membrane box I The suction port and the suction port of the atmospheric jet pump are connected in parallel through the suction line to the suction port of the gas water separation tank, and the air inlet pipe of the atmospheric jet pump is connected to the suction line through the air pressure membrane box π, the atmosphere The air inlet pipe of the jet pump is connected to the air outlet port of the air pressure membrane box, and the air outlet port of the air pressure diaphragm box communicates with the outer cavity of the diaphragm of the air pressure capsule I through the branch.

[0028] The low vacuum state is that the negative pressure value in the gas water separation tank is between 0 and -0.09 MPa. The high vacuum state is that the negative pressure value in the gas water separation tank is -0.09~-0.096Mpa.

[0029] Referring to FIG. 1, a plurality of air outlets 2 of the pumping water are disposed on the soft soil base film, and each of the film outlets is connected with a set of check valves and shutoff valves 3 and placed on the film. The interface around the gas-water separation tank 5 is connected; the gas-water separation tank 5 is equipped with a submersible pump 4 and a liquid level sensor 6, and the top of the gas-water separation tank 5 is equipped with a vacuum gauge with a negative pressure sensor ₈ , and a buoyancy stop valve. The suction port of the buoyancy stop valve 7 is connected with the pneumatic automatic distributor 10; the suction port of the pneumatic automatic distributor 10 is connected to the suction port of the submersible water ring vacuum pump 15, and the connection pipe is connected in series a check valve 12; the drain port of the submersible pump 4 discharges the discharged water directly into the water tank 16 through the pipeline 11 and the check valve 12; the distribution box 9 is installed at the top of the gas-water separation tank 5, and the distribution box 9 passes The circuit is connected to the solenoid valves 23 and 26 in the negative pressure sensor 8, the liquid level sensor 6, the submersible pump 4, the vacuum pump 15 (electrically controlled) pneumatic automatic distributor, and is powered by a cable from the soft ground.

[0030] A buoyancy stop valve 7 is provided at the top suction port of the gas water separation tank 5, see FIG. When the gas water is separated in the tank The accumulated water rises to the top 吋, and the float 20 floats up and blocks the inlet of the variable-diameter flange 17. The reducing flange 17 is connected to the outlet of the gas-water separation tank 5 by a screw 18 through a gasket 19. The float 20 is confined in a certain space by a grill 21 mounted on the variable-diameter flange 17.

[0031] pneumatic automatic distributor 10, electronic control scheme implementation, see FIG. 4: (electrically controlled) automatic air pressure distribution between the suction port of the submersible water ring vacuum pump 15 and the air outlet of the gas water separation tank 5 The pipe is connected to the suction port of the electromagnetic valve 23 and the suction port of the atmospheric jet pump 25; the suction port of the electromagnetic valve 23 and the suction port of the atmospheric jet pump 25 are connected by the pipe 24 and the gas water The variable-diameter flange 17 at the suction port of the separation tank 5 is connected; a solenoid valve 26 is connected in series in the air inlet line 27 of the atmospheric jet pump 25, and the solenoid valve 23 and the solenoid valve 26 are connected to the distribution box 9 by the gas path. When the vacuum pump 15 is operated to start the gas enthalpy in the gas-water separation tank 5, the vacuum degree in the gas-water separation tank 5 is in the range of 0 to -0.09 MPa, the solenoid valve 23 is "on", and the solenoid valve 26 is at "stop". Then, the vacuum pump 15 directly sucks the gas in the gas water separation tank 5 through the pipeline 22 and the pipeline 24; when the gas vacuum degree in the gas water separation tank 5 reaches -0.09 Mpa, the negative pressure sensor 8 outputs a control signal, the solenoid valve At the end of 23, the solenoid valve 26 is turned on. Then, the vacuum pump 15 can only suck the air entering the line 27 through the line 22 and the atmospheric jet pump 25, and then the gas in the gas-water separation tank 5 is sucked through the line 24 by the mixing chamber of the atmospheric jet pump 25. The degree of vacuum of the gas-water separation tank 5 was brought to -0.096 MPa.

[0032] pneumatic automatic distributor 10, air control scheme embodiment, see FIG. 3: (air control) air pressure automatic distribution between the suction port of the submersible water ring vacuum pump 15 and the air outlet of the gas water separation tank 5 , the pipeline 22 is tapped to the suction port of the air pressure bellows I28B and the air suction port of the atmospheric jet pump 25; the air inlet of the air pressure bellows I28B and the air inlet of the atmospheric jet pump 25 are connected by the pipeline 24 and The variable-diameter flange 17 at the suction port of the gas-water separation tank 5 is connected; the line 22 is also tapped into the working chamber of the air pressure bellows Π28Α. The air inlet line 27 of the atmospheric jet pump 25 is closed by a spring valve stem 32 at the end of the bellows Π28. When the vacuum pump 15 starts to suck the gas in the gas-water separation tank 5, the gas vacuum in the tank is in the range of 0 to -0.09 Mpa. The negative pressure of the inner cavity of the air pressure capsule Π28Α is gradually increased, and the diaphragm 31 is moved under the external atmospheric pressure, and the valve stem 29 is moved under the resistance of the spring 30; the diaphragm of the diaphragm air box I28B The sheet 31 is still in the equivalent negative pressure in the line 27, so that the valve stem 29 does not move. Therefore, the vacuum pump 15 still passes through the line 22 through the inner chamber of the gas pressure capsule 12 8B, and directly sucks the gas in the gas water separation tank 5 through the line 24. By setting, when the degree of vacuum in the gas-water separation tank reaches -0.090 MPa, and the valve stem 29 in the gas permeable membrane cassette 幵 28 幵 licks the spring valve stem 32, the air inlet line 27 is vented. The external atmosphere enters the outer chamber of the diaphragm 31 of the air bellows I28B via the line 27. Within The valve stem 29 of the chamber rapidly moves to close the passage of the conduit 22 and the conduit 24 through its interior; while the external atmosphere is passed through line 27 to the atmospheric inlet of the atmospheric jet pump. The helium vacuum pump 15 can only suck the atmospheric jet pump 25 through the line 22, and the atmospheric jet pump 25 sucks the gas in the gas-water separation tank 5 through the mixing chamber through the mixing chamber 5, thereby gradually increasing the degree of vacuum of the gas-water separation tank 5. Reached -0.096Mpa.

The submersible water ring vacuum pump 15 is shown in Figure 5. It consists of a support 33, a submersible motor 35, a seal oil chamber 36 and a water ring vacuum pump head 38. The cable-leading sealing device 34 of the submersible motor 35 includes a cover plate and a cable line which are sealedly connected to the pump body, the cover plate is provided with an inner cavity, the cable wire outlet port is located on the inner cavity wall, and the cable is located in the inner cavity of the cover plate. Each line of the line is provided with a section of bare wire, and the inner cavity of the cover is filled with an insulating sealing material. See the "sealing device for a pump lead-out cable connector" (ZL200920038 61.5) owned by the applicant to achieve its underwater sealing performance; the sealing oil chamber 36 uses two layers of oil chamber chambers, which are arranged in each layer of the oil chamber chamber. A set of mechanical seals 37, a set of mechanical seals 37 are provided in the water ring pump head 38, and the three sets of mechanical seals 37 together ensure the pump shaft drive sealing performance.

Claims

Claim

The utility model relates to a small combined soft foundation treatment construction device, which comprises a plurality of film outlets for pumping water arranged on a soft soil base film, characterized in that: a combined suction water device is provided, which is connected with the film outlet port, The combined suction water device comprises at least one gas water separation tank and one water ring vacuum pump, and the gas water separation tank and the water ring vacuum pump are installed on the soft soil base film near the film outlet, and the film outlets are respectively The interfaces provided around the gas-water separation tank are connected, and a set of check valves and shut-off valves are arranged on each of the interface pipes; a submersible pump is installed in the gas-water separation tank, and the drain port of the submersible pump is disposed in the gas-water separation tank In addition, an air suction port is arranged at an upper portion of the gas water separation tank, and the air suction port is connected to the air inlet of the water ring vacuum pump through a pipeline. A small combined soft foundation treatment construction apparatus according to claim 1, wherein

: a buoyancy shut-off valve is arranged at the suction port on the upper part of the gas-water separation tank, and the suction port of the upper part of the gas-water separation tank is connected to the suction port of the water ring vacuum pump through the automatic air pressure distributor; the suction port of the water ring vacuum pump A check valve is arranged on the connecting line with the pneumatic automatic distributor; the pneumatic automatic distributor includes a parallel pressure control valve and an atmospheric jet pump, and the pressure control valve and the atmospheric jet pump are controlled by pressure in the gas water separation tank. The negative pressure value in the gas-water separation tank is greater than the set negative pressure value 吋, the pressure control valve is in the snoring state, the atmospheric jet pump is in the closed state, and the pressure of the gas-water separation tank is in the low-vacuum state. The pressure control valve vacuums the gas-water separation tank; the negative pressure value in the gas-water separation tank reaches the set negative pressure value 吋, the pressure control valve is closed, the atmospheric jet pump is snoring, and the gas-water separation is continued by the atmospheric jet pump The tank is evacuated to bring the pressure in the gas-water separation tank to a high vacuum state.

A small combined soft foundation treatment construction apparatus according to claim 1 or 2, wherein: said water ring vacuum pump is an air-cooled water ring vacuum pump operating in the atmosphere.

The small combined soft foundation treatment construction apparatus according to claim 1 or 2, wherein: the water ring vacuum pump is a submersible water ring vacuum pump disposed in the water tank; and a water tank is disposed beside the gas water separation tank to dive The water ring vacuum pump is disposed in the water tank, and the drain port of the submersible pump is connected to the water tank through the drain line and the check valve.

The small combined soft foundation treatment construction apparatus according to claim 1 or 2, wherein: the power of the water ring vacuum pump is not more than 7.5 KW. The small combined soft foundation treatment construction device according to claim 2, wherein: the pressure control valve and the atmospheric jet pump are both electromagnetic control opening and closing valves, and a negative pressure sensor is disposed on the gas water separation tank. The control signal output from the negative pressure sensor is connected to the pressure control valve and the atmospheric jet pump through the control system.

The small combined soft foundation treatment construction apparatus according to claim 2, wherein: said pressure control valve is a gas pressure membrane cartridge I, and an air suction port of the air pressure membrane cartridge I and an air suction port of the atmospheric jet pump are connected in parallel through the air suction pipe. The road is connected with the suction port of the water ring vacuum pump, and the suction port of the air bellows I and the air inlet of the atmospheric jet pump are connected in parallel through the suction line to the suction port of the gas water separation tank, and the air inlet of the atmospheric jet pump The pipeline is connected to the suction pipeline through the air pressure membrane box π, and the air inlet pipeline of the atmospheric jet pump is connected with the air outlet port of the air pressure membrane box π, and the air outlet port of the air pressure membrane box passes through the branch road and the air pressure membrane box I The outer cavity of the diaphragm communicates.

The small combined soft foundation treatment construction apparatus according to claim 2, wherein: the low vacuum state is that a negative pressure value in the gas water separation tank is between 0 and -0.09 MPa. The small combined soft foundation treatment construction apparatus according to claim 2, wherein: the high vacuum state is that the negative pressure value in the gas water separation tank is -0.09 to -0.096 MPa. The small combined soft foundation treatment construction device according to claim 4, wherein: the submersible water ring vacuum pump comprises a support, a submersible motor, a seal oil chamber and a water ring vacuum pump head, and the seal oil chamber adopts two layers. The oil chamber cavity is provided with a set of mechanical seals in each layer of the oil chamber cavity, and a set of mechanical seals are arranged in the water ring pump head, and the three sets of mechanical seals together ensure the pump shaft drive sealing performance.