CN107328452B - Device for measuring volume of irregular sealed cavity and operation method thereof - Google Patents
Device for measuring volume of irregular sealed cavity and operation method thereof Download PDFInfo
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- CN107328452B CN107328452B CN201710661180.1A CN201710661180A CN107328452B CN 107328452 B CN107328452 B CN 107328452B CN 201710661180 A CN201710661180 A CN 201710661180A CN 107328452 B CN107328452 B CN 107328452B
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- 230000001788 irregular Effects 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 280
- 238000011084 recovery Methods 0.000 claims description 39
- 238000007789 sealing Methods 0.000 claims description 12
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims 1
- 239000012482 calibration solution Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 2
- 239000013077 target material Substances 0.000 description 2
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 1
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F17/00—Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies
Abstract
The invention discloses a device for measuring the volume of an irregular sealed cavity and an operation method thereof, and the device comprises a frame, a liquid storage tank, a temporary storage liquid container, a pressurizing device and a vacuumizing device, wherein the liquid storage tank is positioned above the temporary storage liquid container, the liquid storage tank is communicated with the pressurizing device through a first pipeline, the pressurizing device is also connected with the temporary storage liquid container and is provided with a first valve on a connecting pipeline, the temporary storage liquid container is respectively communicated with the vacuumizing device and the irregular sealed cavity to be measured through a second pipeline to form a closed pipeline, the irregular sealed cavity to be measured is positioned below the temporary storage liquid container, and the first pipeline is provided with a valve for controlling liquid working medium in the liquid storage tank to flow into the pressurizing device; the second pipeline is provided with a valve for controlling the liquid working medium serving as the calibration liquid in the temporary storage liquid container to flow into the irregular sealed cavity to be measured. The invention has no limit to the size of the irregular sealed cavity, has good universality, simple and convenient operation and high accuracy, and is suitable for various cavities with complex internal structure and shape.
Description
Technical Field
The invention relates to a device for measuring the volume of an irregularly sealed cavity and also relates to an operation method of the device for measuring the volume of the irregularly sealed cavity.
Background
The volume measurement of the regularly sealed cavities is relatively simple compared with the irregularly sealed cavities. Currently, there are many methods for calibrating the volume of a regularly sealed cavity, and the accuracy is quite high. However, since the inside of the irregular sealed cavity is in an irregular shape, the volume calibration is difficult, and thus, the method for calibrating the volume of the irregular sealed cavity is very limited.
The existing method for calibrating the volume of the irregular sealed cavity is usually a volume calibration method, one of which is a gas volume calibration method, namely a series of complex operations of firstly filling gas into the irregular sealed cavity, then discharging gas into a container filled with water and the like, and calculating the volume of the irregular sealed cavity through a mathematical equation. The other is a liquid volume calibration method, namely filling liquid working medium into the irregular sealed cavity, and calculating the volume of the irregular sealed cavity by measuring the volume of the liquid working medium. There is also a method for calibrating the volume of liquid for an irregular sealed cavity with a larger volume, which is to fill liquid into the irregular sealed cavity first, and then add devices such as a liquid-proof film to calibrate the volume of the irregular sealed cavity.
However, the various calibration methods described above have the following drawbacks during operation:
the method has the advantages that the requirement on the internal structure of the irregular sealed cavity is high, and when the internal structure of the cavity is complex or has sharp parts, the damage to incidental devices such as a liquid separation film is very easy to cause in the operation process.
The operation is complex, the calculated result amount is large, the residual amount of the liquid working medium is large, the error is large, and the accuracy is low in the operation process.
According to the liquid working medium calibration method, the liquid working medium is difficult to select, and part of the liquid working medium can corrode target materials to a certain extent, so that the irregular sealed cavity is damaged, and the cost is increased.
The existing volume calibration method is suitable for the sealed cavity with smaller volume, and for the sealed cavity with large volume, if the existing volume calibration method cannot be used for filling the sealed cavity, the volume cannot be measured, and if the volume is measured for multiple times, the problems of low accuracy and large error are caused. Therefore, the existing volume calibration method has limitation on the size of the sealing cavity and has poor universality.
Disclosure of Invention
The first object of the invention is to provide a device for measuring the volume of an irregular sealed cavity, which has the advantages of simple structure, low cost, convenient operation, high precision and wide application range.
A second object of the present invention is to provide a method of operating the above device for determining the volume of an irregularly sealed cavity.
The first object of the invention is achieved by a device for determining the volume of an irregularly sealed cavity, characterized in that: the device comprises a frame, a liquid storage tank, a temporary storage liquid container, a pressurizing device and a vacuumizing device, wherein the liquid storage tank is arranged on the frame and used for containing liquid working media, the temporary storage liquid container is used for receiving the liquid working media in the liquid storage tank, the pressurizing device and the vacuumizing device are used for pressurizing the interior of the temporary storage liquid container, the liquid storage tank is positioned above the temporary storage liquid container, the liquid storage tank is communicated with the pressurizing device through a first pipeline, the pressurizing device is further connected with the temporary storage liquid container and is provided with a first valve on a connecting pipeline, the temporary storage liquid container is respectively communicated with the vacuumizing device and an irregular sealing cavity to be measured through a second pipeline so as to form a closed pipeline, the irregular sealing cavity to be measured is positioned below the temporary storage liquid container, and the valve used for controlling the liquid working media in the liquid storage tank to flow into the pressurizing device is arranged on the first pipeline; and a valve for controlling the liquid working medium serving as the calibration liquid in the temporary storage liquid container to flow into the irregular sealed cavity to be measured is arranged on the second pipeline.
According to the invention, through the valves arranged on the operation pipeline, liquid working medium can be filled into the irregular sealed cavity to be measured for multiple times, and even if the volume of the irregular sealed cavity to be measured is large, the volume of the irregular sealed cavity to be measured can be measured through the liquid working medium filled for multiple times, so that the size of the irregular sealed cavity to be measured is unlimited, and the method is good in universality. Moreover, the invention has simple and convenient operation process, high accuracy, low requirements on the internal structure of the sealed cavity, and wide application range, and is suitable for various cavities with complex internal structure shapes.
As a preferred embodiment of the invention, the frame is a closed shell, the liquid storage tank, the temporary storage liquid container, the pressurizing device and the vacuumizing device are all positioned in the shell, wherein the liquid storage tank is positioned at the upper part of the shell, the temporary storage liquid container is positioned at the middle part of the shell, the pressurizing device is positioned between the liquid storage tank and the temporary storage liquid container, and the vacuumizing device and the irregular sealing cavity to be measured are both positioned at the lower part of the shell.
As a preferred embodiment of the invention, the device for measuring the volume of the irregularly sealed cavity further comprises a first recovery pipeline, wherein the first pipeline mainly comprises a vertical main pipeline and two transverse branches, the valve on the first pipeline is a first electric three-way valve, the vertical main pipeline is connected with the two transverse branches through the first electric three-way valve, the vertical main pipeline is further connected with the bottom surface of the liquid storage tank, one transverse branch is used as the first recovery pipeline and is further connected with a recovery container outside the shell, and the other transverse branch is further connected with the pressurizing device.
As a preferred embodiment of the invention, the device for measuring the volume of the irregular sealed cavity further comprises a second recovery pipeline, the second pipeline mainly comprises a vertical main pipeline and two transverse branches, the valve on the second pipeline comprises a second valve, a third valve and a second electric three-way valve, the second valve is arranged on the vertical main pipeline, the vertical main pipeline is connected with the pipe body of one transverse branch, one end of the transverse branch serving as the second recovery pipeline is connected with a recovery container positioned outside the shell, the other end of the transverse branch is connected with the irregular sealed cavity to be measured through the second electric three-way valve, the third valve is positioned on the pipe section after the connecting part of the second recovery pipeline and the main pipeline, one end of the other transverse branch is connected with the vacuumizing device, and the other end of the other transverse branch is connected with the irregular sealed cavity to be measured through the second electric three-way valve.
As one implementation mode of the invention, the pressurizing device adopts an air cylinder, the upper part and the lower part of the air cylinder are respectively provided with an air inlet which extends to the shell, an upper air inlet and a lower air inlet are respectively arranged, and pipelines between the air cylinder and the temporary storage liquid container are respectively connected to the bottom of the air cylinder and the top surface of the temporary storage liquid container.
As an improvement of the invention, the liquid working medium adopts a low-temperature working medium, and the low-temperature working medium does not corrode the target material of the irregular sealed cavity, so that the cost is low, and the adhesion force between the low-temperature working medium and the inner wall of the irregular sealed cavity is extremely small, and the low-temperature working medium does not remain on the inner wall of the cavity to influence the next operation, so that the calculation result is accurate, and the accuracy of the volume calibration of the irregular sealed cavity is further improved.
As a recommended mode of the invention, the low-temperature working medium adopts tetrafluoroethane, difluoro methylene dichloride or difluoro chloromethane, and other existing low-temperature working media can be adopted.
The second object of the invention is achieved by a method for operating the above-mentioned device for determining the volume of an irregularly sealed cavity, characterized in that it comprises the following steps:
the method comprises the steps that an irregular sealed cavity to be measured is installed on an interface of a second electric three-way valve for connecting the irregular sealed cavity to be measured, the volume of the irregular sealed cavity to be measured is estimated, a liquid working medium is prepared, and the liquid working medium is filled into a liquid storage tank;
closing an interface, which is used for connecting a first recovery pipeline, an interface, which is used for connecting a vertical main pipeline of the first pipeline, of a first electric three-way valve and a third valve, wherein the other valves are all in an open state;
opening the vacuumizing device, and pumping out air in the whole closed pipeline to enable the whole closed pipeline to be in a vacuum state;
fourth, closing an interface of the second electric three-way valve for being connected with the vacuumizing device, and then closing the vacuumizing device;
closing an interface of the second electric three-way valve for connecting with the irregular sealed cavity to be measured, opening an interface of the first electric three-way valve for connecting with the vertical main path of the first pipeline, enabling the liquid working medium in the liquid storage tank to enter the temporary storage liquid container to serve as the calibration liquid, closing the interface of the first electric three-way valve for connecting with the vertical main path of the first pipeline when the liquid level of the calibration liquid in the temporary storage liquid container reaches the volume scale C1 of the temporary storage liquid container, and recording the volume scale C1 of the temporary storage liquid container;
sixthly, opening a second electric three-way valve for a connector connected with the irregular sealed cavity to be measured, opening a pressurizing device, pressurizing the calibration liquid in the temporary storage liquid container, and enabling the calibration liquid to flow into the irregular sealed cavity to be measured;
(1) when the residual calibration liquid in the temporary storage liquid container is that the volume scale C1 of the temporary storage liquid container is larger than the volume V of the irregular sealed cavity to be measured, at the moment, closing an interface of the second electric three-way valve for connecting with the irregular sealed cavity to be measured, recording the liquid level volume scale C2 of the residual calibration liquid in the temporary storage liquid container, wherein C2 is more than 0 and less than or equal to C1, completing the filling of the irregular sealed cavity to be measured, and turning to step S;
(2) when the liquid level of the calibration liquid in the temporary storage liquid container is larger than 0 scale and is close to 0 scale, the valve port of the second valve is regulated to be small, so that the liquid level of the calibration liquid slowly descends, when the liquid level of the calibration liquid descends to 0 scale, the second valve is immediately closed, at the moment, the volume scale C1 of the temporary storage liquid container is smaller than or equal to the volume V of the irregular sealed cavity to be measured, the interface of the second electric three-way valve for connecting with the irregular sealed cavity to be measured is closed, the second valve and the third valve are opened, the calibration liquid in the pipeline is recovered, after recovery is completed, the third valve is closed, the interface of the second electric three-way valve for connecting with the vacuumizing device is opened, and air in the whole closed pipeline is pumped out, so that the whole closed pipeline is in a vacuum state; closing an interface of the second electric three-way valve for connecting with the vacuumizing device, and then closing the vacuumizing device; opening a first electric three-way valve for connecting an interface of a vertical main way of the first pipeline, enabling a liquid working medium in the liquid storage tank to enter the temporary storage liquid container to serve as a calibration liquid, closing the interface of the first electric three-way valve for connecting the vertical main way of the first pipeline when the liquid level of the calibration liquid in the temporary storage liquid container reaches the volume scale C1 of the temporary storage liquid container, and recording the volume scale C1 of the temporary storage liquid container; turning to step six; repeating the steps for N times, wherein N is more than or equal to 1, until the residual calibration liquid in the temporary storage liquid container exists, recording the liquid level volume scale C2 of the residual calibration liquid in the temporary storage liquid container and the volume scale C1 of the temporary storage liquid container each time, and completing filling of the irregular sealed cavity to be measured, and transferring to the steps;
and (3) calculating the filling amount of the calibration liquid, namely:
v=c1-C2 formula (1)
And calculating the filling amount of the calibration liquid, namely:
v=c1×n+ (C1-C2) formula (2).
In the step (1), the solution amount of the calibration liquid in the temporary storage liquid container is observed, and when the temporary storage liquid container is nearly completely flowed, the second valve is closed, so that the metering error caused by the second valve can be avoided.
After the steps or the steps are finished, the first electric three-way valve is opened for connecting the interface of the first recovery pipeline and the third valve, and the residual liquid working medium in the closed pipeline flows into the recovery container for recovery.
In the step of the invention, the supercharging device adopts a cylinder, the upper part and the lower part of the cylinder are respectively provided with an air inlet extending to the shell, the air inlet is respectively an upper air inlet and a lower air inlet, air is firstly filled into the lower part of the cylinder from the lower air inlet to push the piston to move upwards, then a second electric three-way valve is opened for a joint connected with an irregular sealing cavity to be measured, then air is filled into the upper part of the cylinder from the upper air inlet, the pressure of the air filled from the upper air inlet is larger than the pressure of the air filled from the lower air inlet, the sum of the pressure and the pressure is larger than the saturation pressure of a liquid working medium at the measuring temperature, the piston is pushed to move downwards, and therefore the air in the lower part of the cylinder is pushed into a temporary storage liquid container, and the marking liquid in the temporary storage liquid container flows into the irregular sealing cavity to be measured.
Compared with the prior art, the invention has the following remarkable effects:
the invention has simple operation process, low requirement on the internal structure of the sealed cavity, suitability for various cavities with complex internal structure shape and wide application range.
According to the invention, through the valves arranged on the operation pipeline, liquid working medium can be filled into the irregular sealed cavity to be measured for many times, even if the volume of the irregular sealed cavity to be measured is large, the volume of the irregular sealed cavity to be measured can be measured through filling the liquid working medium for many times, so that the size of the irregular sealed cavity to be measured is unlimited, and the method is good in universality.
According to the invention, the liquid working medium adopts the low-temperature working medium, the cost is low, the adhesion force between the low-temperature working medium and the inner wall of the irregular sealing cavity is extremely small, the liquid working medium can be vaporized at normal temperature and cannot remain on the inner wall of the sealing device so as to influence the next operation, and therefore, the calculation result is accurate and the accuracy is relatively high.
The invention has simple structure, low cost and strong practicability, and is suitable for wide popularization and application.
Drawings
The invention will be described in further detail with reference to the drawings and the specific embodiments.
Fig. 1 is a schematic view of the constitution of the present invention.
Detailed Description
As shown in figure 1, the device for measuring the volume of the irregular sealed cavity comprises a frame, a liquid storage tank 1, a temporary storage liquid container 2, a pressurizing device and a vacuumizing device, wherein the liquid storage tank 1 is arranged on the frame and used for containing liquid working media 15, the temporary storage liquid container 2 is used for receiving the liquid working media 15 in the liquid storage tank 1, the pressurizing device and the vacuumizing device are used for pressurizing the interior of the temporary storage liquid container 2, the liquid storage tank 1 and the temporary storage liquid container 2 are both closed containers, the liquid storage tank 1 is arranged above the temporary storage liquid container 2, in the embodiment, the frame is a closed shell 3, the liquid storage tank 1, the temporary storage liquid container 2, the pressurizing device and the vacuumizing device are all arranged in the shell 3, wherein the liquid storage tank 1 is arranged at the upper part of the shell 3, the temporary storage liquid container 2 is arranged in the middle part of the shell 3, the pressurizing device is arranged between the liquid storage tank 1 and the temporary storage liquid container 2, the vacuum pumping device and the irregular sealed cavity 4 to be measured are both positioned at the lower part of the shell 3, namely, the vacuum pumping device and the irregular sealed cavity 4 to be measured are both positioned below the temporary storage liquid container 2, the vacuum pumping device adopts a vacuum pump 5, the liquid storage tank 1 is communicated with a pressurizing device through a first pipeline, the pressurizing device is also connected with the temporary storage liquid container 2 and is provided with a first valve 6 on a connecting pipeline, the temporary storage liquid container 2 is respectively communicated with the vacuum pump 5 and the irregular sealed cavity 4 to be measured through a second pipeline, so that a closed pipeline is integrally formed, a valve for controlling a liquid working medium 15 in the liquid storage tank 1 to flow into the pressurizing device is arranged on the first pipeline, and a valve for controlling the liquid working medium 15 serving as a calibration liquid in the temporary storage liquid container 2 to flow into the irregular sealed cavity 4 to be measured is arranged on the second pipeline.
In this embodiment, the liquid working medium 15 is a low-temperature working medium, and the low-temperature working medium specifically adopts R134a, so that the cost is low, and the adhesion between the low-temperature working medium and the inner wall of the irregular sealed cavity is extremely small, so that the low-temperature working medium cannot remain on the inner wall of the sealed cavity to affect the next operation.
In this embodiment, the device further includes a first recovery pipeline 8, the first pipeline mainly comprises a vertical main pipeline and two lateral branches, the valve on the first pipeline is a first electric three-way valve 7, the vertical main pipeline is connected with the two lateral branches through the first electric three-way valve 7, the vertical main pipeline is further connected with the bottom surface of the liquid storage tank 1, one lateral branch is further connected with a recovery container located outside the shell 3 as the first recovery pipeline 8, and the other lateral branch is further connected with the supercharging device.
In this embodiment, the device further comprises a second recovery pipeline 16, the second pipeline mainly comprises a vertical main pipeline and two transverse branches, the valve on the second pipeline comprises a second valve 9, a third valve 10 and a second electric three-way valve 11, the second valve 9 is arranged on the vertical main pipeline, the vertical main pipeline is connected with the pipe body of one transverse branch, one end of the transverse branch serving as the second recovery pipeline 16 is connected with the recovery container outside the shell, the other end of the transverse branch is connected with the to-be-measured irregular sealed cavity 4 through the second electric three-way valve 11, the third valve 10 is positioned on the pipe section after the connecting part of the second recovery pipeline 16 and the main pipeline, one end of the other transverse branch is connected with the vacuum pump 5, and the other end of the other transverse branch is connected with the to-be-measured irregular sealed cavity 4 through the second electric three-way valve 11.
In this embodiment, the pressurizing device adopts the cylinder 12, the upper part and the lower part of the cylinder 12 are respectively provided with an air inlet extending to the shell 3, namely an upper air inlet 13 and a lower air inlet 14, the pipelines between the cylinder 12 and the temporary storage liquid container 2 are respectively connected to the bottom of the cylinder 12 and the top surface of the temporary storage liquid container 2, the piston is pushed to move upwards by the air filled from the lower air inlet 14 into the lower part of the cylinder 12, then the air is filled from the upper air inlet 13 into the upper part of the cylinder 12, the pressure of the air filled from the upper air inlet 13 is greater than the pressure of the air filled from the lower air inlet 14, so that the piston is pushed to move downwards, and the air in the lower part of the cylinder is pressed into the temporary storage liquid container 2, so that the calibration liquid flows into the irregular sealed cavity 4 to be measured.
The operation method of the device for measuring the volume of the irregularly-sealed cavity specifically comprises the following steps:
the method comprises the steps that an irregular sealed cavity 4 to be measured is installed on an interface f of a second electric three-way valve 11 for connecting the irregular sealed cavity 4 to be measured, the volume of the irregular sealed cavity 4 to be measured is estimated, a low-temperature working medium R134a is prepared, and the R134a is filled into a liquid storage tank 1;
the first electric three-way valve 7 is closed, the interface c for connecting the first recovery pipeline 8, the interface a for connecting the first pipeline vertical main pipeline and the third valve 10 are all in an open state, namely, the interface b of the first electric three-way valve 7 for connecting the cylinder 12, the interface f of the second electric three-way valve 11 for connecting the irregular sealed cavity 4 to be measured, the interface d for connecting the vacuum pump 5 and the interface e for connecting the second recovery pipeline 16 are all in an open state, and the first valve 6 and the second valve 9 are all in an open state, so that the lower air inlet 14 of the cylinder 12 is closed;
third, the vacuum pump 5 is started, air in the whole closed pipeline is pumped out, the whole closed pipeline is in a vacuum state, and when the pressure value displayed by the vacuum meter on the vacuum pump 5 reaches 2 multiplied by 10 -3 ～5×10 -3 Pa, and continuously vacuumizing for 5-10 minutes;
fourth, the second electric three-way valve 11 is closed for connecting the interface d with the vacuum pump 5, and then the vacuum pump 5 is closed;
the method comprises the steps of (a) closing a port f of a second electric three-way valve 11, which is used for being connected with an irregular sealed cavity 4 to be measured, opening a port a of a first electric three-way valve 7, which is used for being connected with a vertical main way of a first pipeline, wherein R134a in a liquid storage tank 1 enters a temporary storage liquid container 2 to serve as calibration liquid, and closing the port a of the first electric three-way valve 7, which is used for being connected with the vertical main way of the first pipeline, when the liquid level of the calibration liquid in the temporary storage liquid container 2 reaches a volume scale C1 of the temporary storage liquid container, recording the volume scale C1 of the temporary storage liquid container;
starting the cylinder 12, opening the lower air inlet 14, filling gas into the lower air inlet 14 of the cylinder 12, pushing the piston to move upwards, opening the second electric three-way valve 11 for a port f connected with the irregular sealed cavity 4 to be measured, filling gas into the upper air inlet 13 of the cylinder 12, wherein the pressure of the gas filled from the upper air inlet 13 is larger than the pressure of the gas filled from the lower air inlet 14, and the sum of the two is larger than the saturation pressure of the low-temperature working medium at the measuring temperature, namely the saturation pressure 0.6051Mpa of R134a at the measuring temperature of 22 ℃, pushing the piston to move downwards, pressing the calibration liquid in the temporary storage liquid container 2, and enabling the calibration liquid to flow into the irregular sealed cavity 4 to be measured;
(1) when the residual calibration liquid in the temporary storage liquid container 2 is the volume scale C1 of the temporary storage liquid container 2 is larger than the volume V of the irregular sealed cavity 4 to be measured, at the moment, the second electric three-way valve 11 is closed for connecting the interface f with the irregular sealed cavity 4 to be measured, a liquid level meter or an accuracy flowmeter is adopted for recording the liquid level volume scale C2,0 < C2 < C1 of the residual calibration liquid in the temporary storage liquid container 2, the observation of the solution amount of the calibration liquid in the temporary storage liquid container 2 is noted, and when the solution amount of the calibration liquid in the temporary storage liquid container 2 is nearly finished, the second valve 9 is closed, so that the measurement error caused by the liquid level is avoided. Filling the irregular sealed cavity 4 to be measured, and transferring to the step;
(2) when the liquid level of the calibration liquid in the temporary storage liquid container 2 is larger than 0 scale and is close to 0 scale, the valve port of the second valve is regulated to be small, so that the liquid level of the calibration liquid slowly descends, when the liquid level of the calibration liquid descends to 0 scale, the second valve is immediately closed, at the moment, the calibration liquid in the temporary storage liquid container 2 completely enters the irregular sealed cavity 4 to be measured, namely, the full liquid volume scale C1 of the temporary storage liquid container 2 is smaller than or equal to the volume V of the irregular sealed cavity 4 to be measured, the second electric three-way valve 11 is closed for connecting an interface f with the irregular sealed cavity 4 to be measured, the second valve and the third valve are opened, the calibration liquid in the pipeline is recovered, after recovery is completed, the third valve is closed, the second electric three-way valve 11 is opened for connecting an interface d with the vacuum pump 5, and the air in the whole sealed pipeline is pumped out to enable the whole sealed pipeline to be in a vacuum state; closing an interface of the second electric three-way valve for connecting with the vacuumizing device, and then closing the vacuumizing device; opening a first electric three-way valve for connecting an interface of a vertical main way of the first pipeline, enabling a liquid working medium in the liquid storage tank to enter the temporary storage liquid container to serve as a calibration liquid, closing the interface of the first electric three-way valve for connecting the vertical main way of the first pipeline when the liquid level of the calibration liquid in the temporary storage liquid container reaches the volume scale C1 of the temporary storage liquid container, and recording the volume scale C1 of the temporary storage liquid container; turning to step six; repeating the steps for N times, wherein N is more than or equal to 1, until the residual calibration liquid in the temporary storage liquid container 2 exists, recording the liquid level volume scale C2 of the residual calibration liquid in the temporary storage liquid container 2 and the volume scale C1 of each temporary storage liquid container, completing filling of the irregular sealed cavity to be measured, and transferring to the step I;
and (3) calculating the filling amount of the calibration liquid, namely:
v=c1-C2 formula (1)
Transferring to step C;
and calculating the filling amount of the calibration liquid, namely:
v=c1×n+ (C1-C2) formula (2)
If the units of C1 and C2 are milliliters or other volume units, the volume of the irregular sealed cavity is directly obtained after calculation, and if the units of C1 and C2 are not milliliters or other volume units, conversion is needed, and then a volume value is obtained;
transferring to step C;
the first electric three-way valve 7 is used for connecting the joint c of the first recovery pipeline 8 and the third valve 10, and R134a remained in the closed pipeline flows into the recovery container for recovery, wherein R134a in the first recovery pipeline 8 flows in the direction A, and R134a in the second recovery pipeline 16 flows in the direction B. The low-temperature working medium remained in the pipeline can be gasified at normal temperature and normal pressure, cleaning is not needed, and the tail-friendly workload is small.
Embodiments of the present invention are not limited thereto, and other embodiments may be provided according to the above-described general knowledge and conventional means in the art, without departing from the basic technical idea of the present invention, such as the type of the cryogenic medium, the specific structure of the frame, the vacuum pumping device, the pressurizing device, the specific forms of the first pipeline and the second pipeline, and the like. Therefore, the present invention may be modified, substituted or altered in various other forms and modifications that fall within the scope of the invention.
Claims (10)
1. A device for determining the volume of an irregularly sealed cavity, characterized in that: the device comprises a frame, a liquid storage tank, a temporary storage liquid container, a pressurizing device and a vacuumizing device, wherein the liquid storage tank is arranged on the frame and used for containing liquid working media, the temporary storage liquid container is used for receiving the liquid working media in the liquid storage tank, the pressurizing device and the vacuumizing device are used for pressurizing the temporary storage liquid container, the liquid storage tank and the temporary storage liquid container are both closed containers, the liquid storage tank is positioned above the temporary storage liquid container, the liquid storage tank is communicated with the pressurizing device through a first pipeline, the pressurizing device is further connected with the temporary storage liquid container and is provided with a first valve on a connecting pipeline, the temporary storage liquid container is respectively communicated with the vacuumizing device and an irregular sealing cavity to be measured through a second pipeline so as to integrally form a closed pipeline, the irregular sealing cavity to be measured is positioned below the temporary storage liquid container, the valve used for controlling the liquid working media in the liquid storage tank to flow into the pressurizing device is arranged on the first pipeline, and the valve used for controlling the liquid working media serving as calibration liquid in the temporary storage liquid container to flow into the irregular sealing cavity to be measured is arranged on the second pipeline.
2. The apparatus for determining the volume of an irregularly sealed cavity of claim 1, in which: the frame is airtight casing, liquid storage pot, temporary storage liquid container, supercharging device and evacuating device all are arranged in the casing, wherein, the liquid storage pot is arranged on the upper portion of the casing, the temporary storage liquid container is arranged in the middle of the casing, the supercharging device is arranged between the liquid storage pot and the temporary storage liquid container, and the evacuating device and the irregular sealing cavity to be measured are all arranged on the lower portion of the casing.
3. The apparatus for determining the volume of an irregularly sealed cavity of claim 2, in which: the device for measuring the volume of the irregular sealed cavity further comprises a first recovery pipeline, the first pipeline mainly comprises a vertical main pipeline and two transverse branches, the valve on the first pipeline is a first electric three-way valve, the vertical main pipeline is connected with the two transverse branches through the first electric three-way valve, the vertical main pipeline is further connected with the bottom surface of the liquid storage tank, one transverse branch is used as the first recovery pipeline to be connected with a recovery container outside the shell, and the other transverse branch is further connected with the supercharging device.
4. A device for determining the volume of an irregularly sealed cavity according to claim 3, wherein: the device for measuring the volume of the irregular sealed cavity further comprises a second recovery pipeline, the second pipeline mainly comprises a vertical main pipeline and two transverse branches, the valve on the second pipeline comprises a second valve, a third valve and a second electric three-way valve, the second valve is arranged on the vertical main pipeline, the vertical main pipeline is connected with the pipe body of one transverse branch, one end of the transverse branch serving as the second recovery pipeline is connected with a recovery container positioned outside the shell, the other end of the transverse branch is connected with the irregular sealed cavity to be measured through the second electric three-way valve, the third valve is positioned on the pipe section behind the connecting part of the second recovery pipeline and the main pipeline, one end of the other transverse branch is connected with the vacuumizing device, and the other end of the other transverse branch is connected with the irregular sealed cavity to be measured through the second electric three-way valve.
5. The apparatus for determining the volume of an irregularly sealed cavity of claim 4, in which: the supercharging device adopts the cylinder, the upper portion and the lower part of cylinder have respectively and stretch to the air inlet on the casing, are respectively air inlet and lower air inlet, and the pipeline between cylinder and the temporary storage liquid container is connected respectively on the bottom of cylinder and the top surface of temporary storage liquid container.
6. The apparatus for determining the volume of an irregularly sealed cavity of claim 5, in which: the liquid working medium adopts a low-temperature working medium.
7. A method of operating the apparatus for determining the volume of an irregularly sealed cavity of claim 4, comprising the steps of:
the method comprises the steps that an irregular sealed cavity to be measured is installed on an interface of a second electric three-way valve for connecting the irregular sealed cavity to be measured, the volume of the irregular sealed cavity to be measured is estimated, a liquid working medium is prepared, and the liquid working medium is filled into a liquid storage tank;
closing an interface, which is used for connecting a first recovery pipeline, an interface, which is used for connecting a vertical main pipeline of the first pipeline, of a first electric three-way valve and a third valve, wherein the other valves are all in an open state;
opening the vacuumizing device, and pumping out air in the whole closed pipeline to enable the whole closed pipeline to be in a vacuum state;
fourth, closing an interface of the second electric three-way valve for being connected with the vacuumizing device, and then closing the vacuumizing device;
closing an interface of the second electric three-way valve for connecting with the irregular sealed cavity to be measured, opening an interface of the first electric three-way valve for connecting with the vertical main path of the first pipeline, enabling the liquid working medium in the liquid storage tank to enter the temporary storage liquid container to serve as the calibration liquid, closing the interface of the first electric three-way valve for connecting with the vertical main path of the first pipeline when the liquid level of the calibration liquid in the temporary storage liquid container reaches the volume scale C1 of the temporary storage liquid container, and recording the volume scale C1 of the temporary storage liquid container;
sixthly, opening a second electric three-way valve for a connector connected with the irregular sealed cavity to be measured, opening a pressurizing device, pressurizing the calibration liquid in the temporary storage liquid container, and enabling the calibration liquid to flow into the irregular sealed cavity to be measured;
(1) when the residual calibration liquid in the temporary storage liquid container is that the volume scale C1 of the temporary storage liquid container is larger than the volume V of the irregular sealed cavity to be measured, at the moment, closing an interface of the second electric three-way valve for connecting with the irregular sealed cavity to be measured, recording the liquid level volume scale C2 of the residual calibration liquid in the temporary storage liquid container, wherein C2 is more than 0 and less than or equal to C1, completing the filling of the irregular sealed cavity to be measured, and turning to step S;
(2) when the liquid level of the calibration liquid in the temporary storage liquid container is larger than 0 scale and is close to 0 scale, the valve port of the second valve is regulated to be small, so that the liquid level of the calibration liquid slowly descends, when the liquid level of the calibration liquid descends to 0 scale, the second valve is immediately closed, at the moment, the volume scale C1 of the temporary storage liquid container is smaller than or equal to the volume V of the irregular sealed cavity to be measured, the interface of the second electric three-way valve for connecting with the irregular sealed cavity to be measured is closed, the second valve and the third valve are opened, the calibration liquid in the pipeline is recovered, after recovery is completed, the third valve is closed, the interface of the second electric three-way valve for connecting with the vacuumizing device is opened, and air in the whole closed pipeline is pumped out, so that the whole closed pipeline is in a vacuum state; closing an interface of the second electric three-way valve for connecting with the vacuumizing device, and then closing the vacuumizing device; opening a first electric three-way valve for connecting an interface of a vertical main way of the first pipeline, enabling a liquid working medium in the liquid storage tank to enter the temporary storage liquid container to serve as a calibration liquid, closing the interface of the first electric three-way valve for connecting the vertical main way of the first pipeline when the liquid level of the calibration liquid in the temporary storage liquid container reaches the volume scale C1 of the temporary storage liquid container, and recording the volume scale C1 of the temporary storage liquid container; turning to step six; repeating the steps for N times, wherein N is more than or equal to 1, until the residual calibration liquid in the temporary storage liquid container exists, recording the liquid level volume scale C2 of the residual calibration liquid in the temporary storage liquid container and the volume scale C1 of the temporary storage liquid container each time, and completing filling of the irregular sealed cavity to be measured, and transferring to the steps;
and (3) calculating the filling amount of the calibration liquid, namely:
v=c1-C2 formula (1)
And calculating the filling amount of the calibration liquid, namely:
v=c1×n+ (C1-C2) formula (2).
8. The method of operation of claim 7, wherein: in the step (1), the solution amount of the calibration solution in the temporary storage container is observed, and when the temporary storage container is nearly completely flowed, the second valve is closed.
9. The method of operation of claim 8, wherein: after step (C) or step (C) is completed, the first electric three-way valve is opened for connecting the interface of the first recovery pipeline and the third valve, and the residual liquid working medium in the closed pipeline flows into the recovery container for recovery.
10. The method of operation of claim 9, wherein: in step f, the pressurizing device adopts a cylinder, the upper part and the lower part of the cylinder are respectively provided with an air inlet extending to the shell, the air inlet is respectively an upper air inlet and a lower air inlet, air is filled into the lower part of the cylinder from the lower air inlet to push the piston to move upwards, then a second electric three-way valve is opened for connecting an interface connected with the irregular sealed cavity to be measured, air is filled into the upper part of the cylinder from the upper air inlet, the pressure of the air filled from the upper air inlet is larger than the pressure of the air filled from the lower air inlet, the sum of the pressure and the pressure of the air filled from the upper air inlet is larger than the saturation pressure of the liquid working medium at the measuring temperature, and the piston is pushed to move downwards, so that the air in the lower part of the cylinder is pushed into a temporary storage container, and the marking liquid in the temporary storage container flows into the irregular sealed cavity to be measured.
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| CN112180461B (en) * | 2020-09-11 | 2021-11-23 | 山东大学 | Cavity detection device, detection method and liquid-gas storage method |
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Application publication date: 20171107 Assignee: Foshan Jiuan Energy Storage Technology Co.,Ltd. Assignor: GUANGDONG HI-1 NEW MATERIALS TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. Contract record no.: X2024980002197 Denomination of invention: A device for measuring the volume of irregular sealed cavities and its operating method Granted publication date: 20230926 License type: Common License Record date: 20240223 Application publication date: 20171107 Assignee: Guangdong Xijiang Data Technology Co.,Ltd. Assignor: GUANGDONG HI-1 NEW MATERIALS TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. Contract record no.: X2024980002196 Denomination of invention: A device for measuring the volume of irregular sealed cavities and its operating method Granted publication date: 20230926 License type: Common License Record date: 20240223 |