JP2012166177A - Metering and mixing apparatus and metering and mixing method for gas-liquid mixed fluid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metering and mixing apparatus and a metering and mixing method for gas-liquid mixed fluid which can accurately meter the gas-liquid mixed fluid and can mix the fluid with a predetermined ratio.SOLUTION: The metering and mixing apparatus is used for metering and mixing the gas-liquid mixed fluid which comprises a medium and gas contained in the medium and which has pressure areas of different sensitivity to compression. The metering and mixing apparatus includes: tanks 1, 2 for respectively housing the gas-liquid mixed fluid and other fluid; constant delivery pumps 3, 4 for forcibly feeding respective fluids via different routes 10, 12; a converging part 5 where respective fluids are converged; a non-driven mixing device 6 for mixing respective fluids downstream from the converging part 5; and mixing ratio confirmation routes 7, 8 for confirming the mixing ratio of the gas-liquid mixed fluid and other fluid upstream from the converging part 5. The metering and mixing apparatus is designed in such a way that pressure at the converging part 5 upon mixing operation of respective fluids in the mixing device 6 and pressure at the mixing ratio confirmation routes 7, 8 upon confirming operation of a mixing ratio of the gas-liquid mixed fluid and other fluid are within a range of a pressure region having lower sensitivity to compression of the gas-liquid mixed fluid.

Description

  The present invention relates to a metering and mixing device and a metering and mixing method for a gas-liquid mixed fluid.

  Some paints and adhesives are used by mixing a plurality of liquids. As a device for mixing such a plurality of liquids, a mixing device as described in Patent Document 1 is used. The mixing device described in Patent Document 1 discharges a predetermined amount of two types of liquid (main agent and curing agent) stored in separate tanks by using a pump and feeds them by a non-drive type mixing device. Is.

  When a plurality of liquids are mixed and used, a specific mixing ratio exists depending on the type and combination of liquids used. Therefore, a plurality of liquids are mixed according to the inherent mixing ratio. In general, the liquid used by mixing has viscosity. Therefore, the liquid to be used after mixing is measured by a volumetric measuring method or a Coriolis flow meter, and the mixing ratio is determined.

  After determining the mixing ratio, each liquid is pumped to the mixing section and mixed at a predetermined ratio. When pumping the liquid, it is necessary to apply pressure to the liquid. The higher the viscosity of the liquid used, the higher the pressure applied to the liquid.

  The material thus mixed is applied to a sealant or the like of an aircraft component. In the field of aircraft, a gas-liquid mixed fluid may be used as a liquid material for the purpose of reducing the weight of a structural material. The “gas-liquid mixed fluid” is a fluid in which a minute gas is contained in a medium.

JP 58-150462 A

  The gas-liquid mixed fluid has a characteristic that the volume is changed by an external force, and the change is larger than that of the medium alone. The gas-liquid mixed fluid decreases in volume as the applied pressure increases, and increases in volume as the applied pressure decreases. Therefore, when the gas-liquid mixed fluid is pumped, the gas-liquid mixed fluid cannot be accurately measured by the volumetric measurement method. When using a Coriolis flow meter, it is difficult to handle high-viscosity materials or small quantities. Therefore, with the current technology, it is difficult to accurately measure and mix the gas-liquid mixed fluid at a predetermined ratio.

  Although it is conceivable to mix without applying pressure by manual work, there are problems such as unstable quality and high manufacturing costs.

  This invention is made in view of such a situation, Comprising: It aims at providing the measurement mixing apparatus which can measure a gas-liquid mixed fluid correctly, and can mix with a predetermined | prescribed ratio, and its measurement mixing method .

  In order to solve the above problems, the present invention is a metering and mixing device for metering and mixing gas-liquid mixed fluids having pressure regions with different compressibility sensitivities in which gas is contained in a medium, A tank for storing a gas-liquid mixed fluid and another fluid, a metering discharge pump for pumping the gas-liquid mixed fluid and the other fluid through separate paths, the gas-liquid mixed fluid and the other fluid, A non-drive type mixing device that mixes the gas-liquid mixed fluid and the other fluid on the downstream side of the merging portion, and the gas-liquid mixing on the upstream side of the merging portion. A mixing ratio confirmation path for confirming a mixing ratio of the fluid and the other fluid, and the merging portion in the operation of mixing the gas-liquid mixed fluid and the other fluid by the mixing device, and the gas Confirm mixing ratio of liquid mixture fluid and other fluids Pressure at the mixing ratio check path during operation that provides a metering mixing device of the gas-liquid gas-liquid mixed fluid that is designed to compressibility sensitivity of the mixed fluid is in the range of lower pressure region of.

The gas-liquid mixed fluid mixed in the present invention, when pressurized, is compressed by being controlled by the characteristics of the gas contained in the gas-liquid mixed fluid, and the characteristics of the medium of the gas-liquid mixed fluid And a second pressure region that is compressed by being controlled. The second pressure region is higher than the first pressure region. In the first pressure region and the second pressure region, the displacement amount of the gas-liquid mixed fluid is substantially proportional to the applied pressure. The compressibility sensitivity of the second pressure region is lower than the compressibility sensitivity of the first pressure region.
According to the present invention, the pressure at the merge portion and the mixing ratio confirmation path during operation of the mixing device is designed to be within the range of the pressure region where the compressibility sensitivity of the gas-liquid mixed fluid is low, The mixing or the mixing ratio can be confirmed in a state where the volume fluctuation is small.

  In one aspect of the invention, it is preferable that the pressure at the inlet of the metering discharge pump is designed to be within the range of the pressure region where the compressibility sensitivity of the gas-liquid mixed fluid is lower.

  By setting the pressure at the inlet of the metering discharge pump within the range of the pressure region, the metering pump can also be within the range of the pressure region where the compressibility sensitivity of the gas-liquid mixed fluid is lower. Thereby, the gas-liquid mixed fluid can be measured more accurately.

  In one aspect of the invention, it is preferable to provide a pressure loss element on the downstream side of the mixing device and on the mixing ratio confirmation path.

  By providing the pressure loss element at the location, the pressure from the metering discharge pump outlet to the pressure loss element can be increased. As a result, the pressure at the junction at the time of mixing and the pressure at the mixing ratio confirmation path at the time of confirmation of the mixing ratio can be within the range of the pressure region where the compressibility sensitivity of the gas-liquid mixed fluid is lower.

  1 aspect of the said invention WHEREIN: It is preferable to provide a pumping pump between the said tank and the said fixed delivery pump.

  By providing a pressure feed pump at the location, the fixed discharge pump can be operated at a predetermined pressure. That is, it becomes possible to make the inside of the metering pump be in the range of the pressure region where the compressibility sensitivity of the gas-liquid mixed fluid is lower. Thereby, the gas-liquid mixed fluid can be measured more accurately.

  The present invention is a metering and mixing method for metering and mixing gas-liquid mixed fluids having pressure regions with different compressibility sensitivities in which gas is contained in a medium, wherein the gas-liquid mixed fluid contained in a tank and The other fluid is pumped through a separate path by a metering discharge pump, and before being joined at the junction, it is led to a blend ratio confirmation path and weighed separately to determine the blend ratio, and to the tank A mixed step of pumping the gas-liquid mixed fluid and other fluids accommodated by a fixed discharge pump through separate paths, joining them at a junction, and then mixing them by a non-drive type mixing device. The pressure in the mixing ratio confirmation path in the mixing ratio determining step and the pressure in the merging portion in the mixing step are within the range of the pressure region where the compressibility sensitivity of the gas-liquid mixed fluid is lower. Gas-liquid mixed fluid measurement To provide a focus method.

  According to the above invention, the pressure in the joining portion and the mixing ratio confirmation path during operation of the mixing device is within the range of the pressure region where the compressibility sensitivity of the gas-liquid mixed fluid is low, so that the volume fluctuation is small. The mixing or the mixing ratio can be confirmed with.

  In one aspect of the invention described above, in the mixing ratio determining step and the mixing step, it is preferable that the pressure at the inlet of the metering discharge pump is within the range of the pressure region where the compressibility sensitivity of the gas-liquid mixed fluid is lower.

  By setting the pressure at the inlet of the metering discharge pump within the range of the pressure region, the metering pump can also be within the range of the pressure region where the compressibility sensitivity of the gas-liquid mixed fluid is lower. Thereby, the gas-liquid mixed fluid can be measured more accurately.

  According to the present invention, the gas-liquid mixed fluid can be measured and mixed in a state in which the volume fluctuation is small by setting the pressures of the merging portion and the mixing ratio confirmation path within a predetermined range. As a result, the volume of the gas-liquid mixed fluid that merges at the merging portion and the gas-liquid mixed fluid that is measured in the mixing ratio confirmation path are substantially equal. The metering and mixing device can be reflected in the mixing ratio of the fluid and the other fluid.

It is a flowchart of the mixed discharge apparatus which concerns on embodiment of this invention. It is a figure which shows the amount of compression displacement at the time of pressurizing each of a main ingredient and a hardening | curing agent. It is a figure explaining the method of compression amount measurement.

Hereinafter, a mixed discharge device according to an embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a flowchart of the mixed discharge device 100 according to the embodiment.

  The mixing and discharging device 100 includes a main agent tank 1, a curing agent tank 2, a main agent fixed amount discharge pump 3, a hardener fixed amount discharge pump 4, a merging unit 5, a mixing device 6, a mixing ratio confirmation path 7 and 8, and a weigh scale 9. ing.

  The main agent tank 1 contains the main agent. The main agent is a gas-liquid mixed fluid and contains minute gases dispersed in a medium. The medium is a resin material such as polysulfide, silicon, and urethane. The gas is air, oxygen, nitrogen, carbon dioxide, or the like. For example, as the gas-liquid mixed fluid, a fluid prepared by adding a foaming agent or microbeads to a resin material such as PR-1776MB-2 manufactured by PPG and including a minute gas is used. Note that the gas-liquid mixed fluid includes a fluid in which a gas is unintentionally included.

  In FIG. 2, the compression displacement amount at the time of pressurizing each main ingredient and hardening | curing agent of PR-1776MB-2 is shown. The main agent is a gas-liquid mixed fluid containing the intended minute gas. A curing agent is a fluid in which a gas is unintentionally included in a medium. Each gas-liquid mixed fluid was filled in a cylinder (diameter: 30 mm) at a height of 10 mm, pressure (0.1 MPa to 15 MPa) was applied from one direction, and the amount of compression was measured (FIG. 3).

  According to FIG. 2, the amount of displacement of each gas-liquid mixed fluid also increased as the applied pressure increased. The inclination of the change of the displacement amount with respect to the pressure of the gas-liquid mixed fluid, that is, the compressibility sensitivity of the gas-liquid mixed fluid is in the first pressure region (0.1 MPa to 2 MPa) and the second pressure region (2 MPa to 15 MPa). It was different. In the first pressure region, the gas-liquid mixed fluid was displaced approximately in proportion to the applied pressure. Even in the second pressure region, the gas-liquid mixed fluid was displaced in proportion to the applied pressure, but the inclination thereof was larger than that in the first pressure region. From the above results, it was confirmed that the volume fluctuation of the gas-liquid mixed fluid to which a pressure of 2 MPa or more was applied in the present example within the range of the second pressure region was reduced.

  The amount of compressive deformation of polysulfide containing air was simulated. The simulation was performed assuming that polysulfide containing 12% by volume of air was filled in a cylinder (diameter: 30 mm) at a height of 10 mm and pressure (0.1 MPa to 100 MPa) was applied from one direction. The results are shown in Table 1. The volume of air was calculated from the equation of state (constant temperature).

According to Table 1, the transition of the compressive deformation of the polysulfide containing air showed the same tendency as the result of FIG. The amount of compressive deformation of polysulfide containing air was governed by air characteristics in a pressure region lower than 2 MPa, and was governed by polysulfide properties in a pressure region of 2 MPa or more.
According to the state equation (constant temperature), the volume of air is reduced by 95% by increasing the pressure from 0.1 MPa to 2 MPa.
According to the said result, the volume fluctuation | variation of the gas included can be saturated by pressurizing the gas-liquid mixed fluid within the range of the second pressure region.

  The curing agent tank 2 contains a curing agent (other fluid). The curing agent may be a fluid that causes a curing reaction when added to the main agent, and is appropriately selected according to the main agent used.

A main agent fixed amount discharge pump 3 is connected to the main agent tank 1. The main agent fixed amount discharge pump 3 is provided with a discharge port for discharging the main agent, and a main agent pumping path 10 for pumping the main agent is connected to the discharge port.
It is preferable that a pressure feed pump 11 is provided between the main agent tank 1 and the main agent fixed amount discharge pump 3.

A curing agent metering discharge pump 4 is connected to the curing agent tank 2. The curing agent metering discharge pump 4 is provided with a discharge port for discharging the curing agent, and a curing agent pumping path 12 for pumping the curing agent is connected to the discharge port.
It is preferable that a pressure feed pump 13 is provided between the curing agent tank 2 and the curing agent fixed amount discharge pump 4.

  The main agent fixed amount discharge pump 3 and the hardener fixed amount discharge pump 4 are connected to a connecting link 14. The connecting link 14 is driven by an air motor 16 whose one end 15 is pivotally supported and whose other end is power. The main agent fixed amount discharge pump 3 and the hardener fixed amount discharge pump 4 can discharge the main agent and the hardener from the main agent tank 1 and the hardener tank 2 by driving the other end of the connecting link 14, respectively. The main agent fixed amount discharge pump 3 and the hardener fixed amount discharge pump 4 can adjust the discharge amount by changing the distance from the pivot point when connecting to the connecting link 14. For example, if the distance from the pivot point is shortened, the discharge amount is also reduced.

  The main agent pumping path 10 and the curing agent pumping path 12 are joined at the merging portion 5. A check valve 17 is provided at the junction 5. In FIG. 1, the check valve 17 is provided on the side of the hardener pressurizing path of the confluence point A, but the position where the check valve 17 is provided is not limited to this, and the main agent pressurizing path 10 side of the confluence point A, or It may be provided on both the paths 10 and 12 side of the junction A.

  A non-drive type mixing device 6 is connected to the downstream side of the merging portion 5. An example of the non-driving type mixing device 6 is a static mixer. The static mixer is a static mixer (line mixer) without a drive unit, and includes an element in the mixer. The fluid entering the mixer is stirred and mixed sequentially by the element.

  A discharge port 18 is provided downstream of the mixing device 6 and is open to the atmosphere. A pressure loss element 19 is provided between the mixing device 6 and the discharge port 18. The pressure loss element 19 is a flow rate adjusting valve such as a throttle valve.

The mixing ratio confirmation paths 7 and 8 are respectively connected to the main agent pumping path 10 and the curing agent pumping path 12 on the upstream side of the merging portion 5. Valves 20, 21, 22, and 23 are provided at the connection portion so that the flow of the main agent and the curing agent can be switched from the main agent pumping path 10 and the curing agent pumping path 12 to the mixing ratio confirmation path. In the middle of the mixing ratio confirmation paths 7 and 8, pressure loss elements 24 and 25 are provided, respectively. The pressure loss elements 24 and 25 are flow control valves such as throttle valves.
Ends on the downstream side of the pressure loss elements 24 and 25 of the mixing ratio confirmation paths 7 and 8 are discharge ports 26 and 27, which are open to the atmosphere.

  Next, a method for metering and mixing a gas-liquid mixed fluid using the metering and mixing apparatus 100 will be described. The method for metering and mixing a gas-liquid mixed fluid according to the present embodiment includes a mixing ratio determining step and a mixing step.

(Mixing ratio determination process)
Valves 22 and 23 are closed and valves 20 and 21 are opened.
By supplying air to the air motor 23 and reciprocating the other end of the connecting link 14, the main agent and the hardening agent contained in the main agent tank 1 and the hardener tank 2 are cured by the main agent fixed amount discharge pump 3 and the hardener fixed amount discharge pump 4. The agent is discharged and pumped to the main agent pumping paths 10 and 12, respectively.

  When the pressure pumps 11 and 13 are provided between the tanks 1 and 2 and the metering discharge pumps 3 and 4, the main agent and the curing agent contained in the main agent tank 1 and the curing agent tank 2 are the pressure feeding pumps 11 and 13. 13, the pressure is increased to a predetermined pressure and supplied to the fixed discharge pumps 3 and 4. The predetermined pressure is within the range of the pressure region where the compressibility sensitivity of the main agent is lower. When PR-1776MB-2 is used as the main agent, the main agent and the curing agent may be supplied to the metering discharge pumps 3 and 4 at a pressure of 2 MPa or more.

  The main agent and the curing agent thus pumped are guided to the mixing ratio confirmation paths 7 and 8, respectively. Since the pressure loss elements 24 and 25 are provided in the mixing ratio confirmation paths 7 and 8, the pressures in the mixing ratio confirmation paths 7 and 8 are in the pressure region (second pressure region) where the compressibility sensitivity of the main agent is lower. Can be within range.

  The main agent and the curing agent that have passed through the pressure loss elements 24 and 25 are discharged from the discharge ports 26 and 27, and their weights are measured by the weigh scale 9. Based on the measurement result, the connection position of the metering discharge pumps 3 and 4 to the connection link is adjusted so that the main agent and the curing agent have a predetermined ratio.

(Mixing process)
Valves 20 and 21 are closed and valves 22 and 23 are opened.
Similarly to the mixing ratio determination step, the main agent and the curing agent are pumped to the main agent pumping paths 10 and 12, respectively.

  The main agent and the curing agent fed together are merged at the merging portion 5. Since the pressure loss element 19 is provided on the downstream side of the mixing device, the pressure at the merging portion 5 should be within the range of the pressure region (second pressure region) where the compressibility sensitivity of the main agent is lower. it can.

The joined main agent and curing agent are mixed by the mixing device and discharged from the discharge port 18 through the pressure loss element 19.
The discharged mixed material is filled in a cartridge, mounted on a gun, and applied to an aircraft sealant or the like.

  According to the metering and mixing apparatus 100 having the above configuration, the main agent and the curing agent are weighed and mixed in a compressed state, but since the volume fluctuation is small, the mixing ratio can be accurately measured. At the same time, it is possible to mix at a ratio reflecting the confirmed mixing ratio.

DESCRIPTION OF SYMBOLS 1 Main agent tank 2 Hardener tank 3 Main agent fixed amount discharge pump 4 Hardener fixed amount discharge pump 5 Merge part 6 Mixing device 7, 8 Mixing ratio confirmation path 9 Weigh scale 10 Main agent pressure feed path 11, 13 Pressure feed pump 12 Hardener pressure feed path 14 Connection Ring 15 One end (connection ring)
16 Air motor 17 Check valve 18, 26, 27 Discharge port 19, 24, 25 Pressure loss element 20, 21, 22, 23, 31 Valve 28, 29 Pressure gauge 30 Regulator

Claims (6)

A metering and mixing device for metering and mixing gas-liquid mixed fluids having pressure regions with different compressibility sensitivities in which gas is contained in a medium,
Tanks respectively containing the gas-liquid mixed fluid and other fluids;
A metering discharge pump for pumping the gas-liquid mixed fluid and the other fluid through separate paths;
A merging portion where the gas-liquid mixed fluid and another fluid merge;
A non-driving type mixing device that mixes the gas-liquid mixed fluid and the other fluid downstream from the merging portion;
A mixing ratio confirmation path for confirming a mixing ratio of the gas-liquid mixed fluid and the other fluid on the upstream side of the merging portion;
With
The merging portion during the operation of mixing the gas-liquid mixed fluid and the other fluid with the mixing device, and the mixing ratio confirmation path during the operation of confirming the mixing ratio of the gas-liquid mixed fluid and the other fluid The gas-liquid mixed fluid metering and mixing device is designed so that the pressure at the pressure is within the range of the pressure region where the compressibility sensitivity of the gas-liquid mixed fluid is lower.   The metering / mixing device for a gas-liquid mixed fluid according to claim 1, wherein the pressure at the inlet of the metering discharge pump is designed to be within a pressure region where the compressibility sensitivity of the gas-liquid mixed fluid is lower.   The metering / mixing device for a gas-liquid mixed fluid according to claim 1 or 2, wherein pressure loss elements are provided on a downstream side of the mixing device and the mixing ratio confirmation path.   The metering / mixing device for a gas-liquid mixed fluid according to any one of claims 1 to 3, wherein a pressure feed pump is provided between the tank and the metering discharge pump. A metering and mixing method for metering and mixing gas-liquid mixed fluids having pressure regions with different compressive sensitivities in which gas is contained in a medium,
The gas-liquid mixed fluid and other fluids stored in the tank are pumped through separate paths by a metering discharge pump, and before being merged at the merging section, they are led to a mixing ratio confirmation path and weighed to measure the mixing ratio. Determining the mixing ratio;
The gas-liquid mixed fluid stored in the tank and other fluids are mixed by a non-drive type mixing device after being pumped through a separate path by a metering discharge pump, merged at a merging portion, and
With
The gas in the mixing ratio determining step and the pressure in the merging portion in the mixing step are within the range of the pressure region where the compressibility sensitivity of the gas-liquid mixed fluid is lower. A method for metering and mixing liquid mixed fluids.   6. The gas-liquid mixed fluid according to claim 5, wherein, in the mixing ratio determination step and the mixing step, the pressure at the inlet of the metering discharge pump is set in a range of a pressure region where the compressibility sensitivity of the gas-liquid mixed fluid is lower. Weighing and mixing method.

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