CN107101906B - Mixed gas component proportion measuring device and method - Google Patents
Mixed gas component proportion measuring device and method Download PDFInfo
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- CN107101906B CN107101906B CN201710418649.9A CN201710418649A CN107101906B CN 107101906 B CN107101906 B CN 107101906B CN 201710418649 A CN201710418649 A CN 201710418649A CN 107101906 B CN107101906 B CN 107101906B
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Abstract
The invention discloses a mixed gas component proportion measuring device and a method, wherein the mixed gas component proportion measuring device comprises a cylinder, a piston arranged in the cylinder, a driving mechanism for driving the piston to move, an air pipe, a temperature control mechanism, a pressure sensor and a temperature sensor, wherein the cylinder and the piston form a measuring air chamber with variable volume, one end of the air pipe stretches into the air cylinder to be communicated with the measuring air chamber, a valve is arranged on the air pipe, the temperature control mechanism is used for regulating and controlling the temperature in the measuring air chamber, the pressure sensor is used for detecting the pressure in the measuring air chamber, and the temperature sensor is used for detecting the temperature in the measuring air chamber. The device and the method for measuring the component proportion of the mixed gas can conveniently obtain the component proportion of two different gases in electrical equipment, provide reference data for supplementing insulating gas, and have accurate component proportion measurement.
Description
Technical Field
The invention relates to the technical field of high-voltage insulation, in particular to a device and a method for measuring the component ratio of mixed gas.
Background
Conventionally, gas-insulated electrical equipment generally uses SF6 (sulfur hexafluoride) as an insulating medium, but as environmental protection requirements are increasing, SF6 is a strong greenhouse gas, and its application is limited. Instead, two different gases are combined into a mixed insulating gas according to a certain content ratio to be used as an insulating medium of the gas-insulated electrical equipment. As the operational age increases, the proportion of different gas components that leak will vary due to the different characteristics of the different gases. Before supplementing the insulating gas into the gas-insulated electrical equipment, it is necessary to determine the composition ratio of two different gases in the existing mixed gas in the equipment. The traditional research on the composition ratio of the mixed gas in the equipment is less, and a device capable of better measuring the composition ratio of two different gases in the electrical equipment is not provided, so that a data basis can not be provided for the supplementary gas.
Disclosure of Invention
Based on this, it is necessary to provide a mixed gas component ratio measuring apparatus and method that can measure the component ratio of two different gases in an electrical device, and thus can provide a data basis for supplementary gases.
The technical scheme is as follows:
the utility model provides a mixed gas component proportion survey device, includes the cylinder, locates piston in the cylinder, be used for the drive actuating mechanism, trachea, temperature control mechanism, pressure sensor and the temperature sensor of piston motion, the cylinder with the piston forms the measurement air chamber of variable volume, tracheal one end stretch into in the cylinder with the measurement air chamber intercommunication, be equipped with the valve on the trachea, temperature control mechanism is used for the regulation and control temperature in the measurement air chamber, pressure sensor is used for detecting pressure in the measurement air chamber, temperature sensor is used for detecting temperature in the measurement air chamber.
In one embodiment, the temperature control mechanism comprises a temperature control controller and a temperature control piece electrically connected with the temperature control controller, wherein the temperature control piece is arranged on the cylinder.
In one embodiment, the temperature adjusting piece is a temperature adjusting piece, the shape of the temperature adjusting piece is matched with the outer wall of the cylinder, and the temperature adjusting piece is attached to the outer wall of the cylinder.
In one embodiment, the temperature adjusting member is a semiconductor refrigeration sheet.
In one embodiment, the driving mechanism comprises a worm, a worm wheel and a driving motor, one end of the worm extends into the cylinder and is connected with the piston, the driving motor is in driving connection with the worm wheel, and the worm wheel is in driving connection with the worm.
In one embodiment, a sealing ring is arranged between the piston and the cylinder.
In one embodiment, the mixed gas component proportion measuring device further comprises a control system, and the control system is electrically connected with the driving mechanism, the temperature control mechanism, the pressure sensor and the temperature sensor.
The mixed gas component proportion measuring method adopts the mixed gas component proportion measuring device, and comprises the following steps:
s1: preparing n parts of standard two-component mixed gas which has the same gas composition as the two-component mixed gas to be detected and different component proportions, wherein n is a positive integer, and n is more than or equal to 2;
s2: the mixed gas component proportion measuring device is adopted to measure the pressure-temperature change of n parts of standard two-component mixed gas after a preset temperature control program is carried out under the preset initial pressure and the preset initial temperature conditions, and n pressure-temperature standard measurement curves A are obtained 1 ～A n Obtaining a standard curve cluster { A };
s3: the mixed gas component proportion measuring device is adopted to measure the pressure-temperature change of the two-component mixed gas to be measured after the temperature control program is carried out under the same initial pressure and the same initial temperature, and a pressure-temperature measuring curve B is obtained;
s4: comparing the pressure-temperature measurement curve B with the standard curve cluster { A }, and obtaining a pressure-temperature standard measurement curve A which is close to the pressure-temperature measurement curve B in the standard curve cluster { A } i Then the pressure-temperature standard measurement curve A i The component ratio of the two different gases is the component ratio of the two-component mixed gas to be detected, wherein i is a positive integer and is more than or equal to 2 and less than or equal to n.
In one embodiment, the specific steps of the step S1 are:
setting a target gas distribution ratio according to the application requirement of the two-component mixed insulating gas, selecting n different component ratios within a preset range of the target gas distribution ratio, and preparing n standard two-component mixed gas with different component ratios.
In one embodiment, the specific steps of the step S2 are as follows:
s21: opening a valve, controlling the piston to move through a gas pipe to discharge all the gas in the cylinder by the driving mechanism, sucking quantitative one part of standard two-component mixed gas by the driving mechanism through the gas pipe, and closing the valve;
s22: the driving mechanism controls the movement of the piston to adjust the volume of the measuring air chamber, and the temperature control mechanism regulates and controls the temperature in the measuring air chamber to enable the 1 st part of standard two-component mixed gas in the measuring air chamber to reach the preset initial pressure and the preset initial temperature;
s23: according to a preset temperature control program, the temperature control mechanism gradually adjusts the temperature in the measuring air chamber, and simultaneously records the air pressure change and the temperature change in the measuring air chamber to obtain a pressure-temperature standard measuring curve;
s24: repeating the steps S21-S23 to obtain n pressure-temperature standard measurement curves A 1 ～A n The standard curve cluster { A }.
The invention has the beneficial effects that:
the mixed gas component proportion measuring device is used for obtaining the to-be-measured two-component mixed gas when measuring the component proportion of two different gases in the electrical equipment, preparing n parts of standard two-component mixed gas which has the same gas composition as the to-be-measured two-component mixed gas and different component proportions, respectively introducing the to-be-measured two-component mixed gas and the n parts of standard two-component mixed gas into the measuring gas chamber for testing, and obtaining a pressure-temperature change curve B of the to-be-measured two-component mixed gas and n standard measurement curves A corresponding to the n parts of standard two-component mixed gas by the measuring device 1 ～A n Then the pressure-temperature measurement curve B and n standard measurement curves A 1 ～A n Comparing, obtaining a pressure-temperature standard measurement curve A closest to the pressure-temperature measurement curve B i Then the pressure-temperature standard measurement curve A i The corresponding component ratio of the two different gases is the component ratio of the two-component mixed gas to be detected. The mixed gas component proportion measuring device can conveniently obtain the component proportion of two different gases in the electrical equipment, can be applied to gas insulated electrical equipment using the mixed insulating gas of the two components, and can be used for supplementing the insulating gasFor reference data, and a pressure-temperature change curve B and n standard measurement curves A of n standard two-component gas mixtures 1 ～A n All are obtained through the same device measurement, so that measurement deviation caused by instrument errors can be avoided to a great extent, and the component proportion measurement is accurate.
The method for measuring the component proportion of the mixed gas adopts the mixed gas component proportion measuring device to measure the component proportion of the two-component mixed gas to be measured, and is simple and accurate.
Drawings
FIG. 1 is a schematic structural diagram of a device for measuring the proportion of components of a mixed gas according to an embodiment of the present invention;
fig. 2 is a flow chart of a method for measuring the component ratio of a mixed gas according to an embodiment of the invention.
Reference numerals illustrate:
100. the device comprises a cylinder, 110, a measuring air chamber, 200, a piston, 300, a driving mechanism, 310, a worm, 320, a worm wheel, 330, a driving motor, 400, an air pipe, 500, a temperature control mechanism, 510, a temperature control controller, 520, a temperature control piece, 600, a pressure sensor, 700, a temperature sensor, 800, a valve, 900 and a control system.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items. The terms "first," "second," and the like, as used herein, are used herein to distinguish between objects, but the objects are not limited by these terms.
As shown in fig. 1, a mixed gas component ratio measuring apparatus includes a cylinder 100, a piston 200 provided in the cylinder 100, a driving mechanism 300 for driving the piston 200 to move, an air pipe 400, a temperature control mechanism 500, a pressure sensor 600, and a temperature sensor 700. The cylinder 100 and the piston 200 form a variable volume measurement chamber 110. One end of the air pipe 400 extends into the cylinder 100 to be communicated with the measuring air chamber 110, and a valve 800 is arranged on the air pipe 400. The temperature control mechanism 500 is used to regulate the temperature within the measurement plenum 110. The pressure sensor 600 is used to detect the pressure within the measurement plenum 110. The temperature sensor 700 is used to detect the temperature within the measurement plenum 110.
The mixed gas component proportion measuring device is used for obtaining the mixed gas of two components to be measured when measuring the component proportions of two different gases in electrical equipment, preparing n parts of standard mixed gas of two components which have the same gas composition as the mixed gas of two components to be measured and different component proportions, respectively introducing the mixed gas of two components to be measured and the n parts of standard mixed gas of two components into the measuring air chamber 110 for testing, and obtaining a pressure-temperature change curve B of the mixed gas of two components to be measured and n standard measurement curves A corresponding to the n parts of standard mixed gas of two components by the measuring device 1 ～A n Then the pressure-temperature measurement curve is takenB and n standard measurement curves A 1 ～A n Comparing, obtaining a pressure-temperature standard measurement curve A closest to the pressure-temperature measurement curve B i Then the pressure-temperature standard measurement curve A i The corresponding component ratio of the two different gases is the component ratio of the two-component mixed gas to be detected. The mixed gas component proportion measuring device can conveniently obtain the component proportion of two different gases in the electrical equipment, can be applied to the gas insulated electrical equipment using the two-component mixed insulating gas, provides reference data for supplementing the insulating gas, and provides a pressure-temperature change curve B and n standard measurement curves A of n standard two-component mixed gases 1 ～A n All are obtained through the same device measurement, so that measurement deviation caused by instrument errors can be avoided to a great extent, and the component proportion measurement is accurate. The mixed gas component proportion measuring device is particularly suitable for measuring the proportion components of mixed insulating gas formed by two gases in a certain proportion in gas-insulated electrical equipment, can provide data basis for supplementing insulating gas, and can realize the automation of the gas supplementation of the mixed insulating gas by matching with another gas supplementing device.
In the mixed gas component ratio measuring device according to the embodiment, the measuring air chamber 110 can be formed inside the cylinder 100, the piston 200 is controlled to move inside the cylinder 100 by the driving mechanism 300, the volume of the measuring air chamber 110 can be changed, the pressure inside the measuring air chamber 110 can be changed, the pressure sensor 600 can detect the pressure inside the measuring air chamber 110, and the temperature sensor 700 can detect the temperature inside the measuring air chamber 110. The working principle of the mixed gas component proportion measuring device when measuring the component proportions of two different gases is as follows: opening the valve 800, controlling the movement of the piston 200 by the driving mechanism 300 so that all the gas in the cylinder 100 is discharged through the gas pipe 400; the piston 200 is controlled to move through the driving mechanism 300, so that a certain amount of gas to be tested is sucked into the cylinder 100 through the gas pipe 400, and the valve 800 is closed, wherein the gas to be tested is one of two-component mixed gas to be tested and n parts of standard two-component mixed gas; controlled by the drive mechanism 300The piston 200 moves to adjust the volume of the measuring air chamber 110, the temperature control mechanism 500 regulates and controls the temperature in the measuring air chamber 110, so that the gas to be tested in the measuring air chamber 110 reaches the preset initial pressure and the preset initial temperature, and the gas to be tested is under the condition of equal volume before testing; according to a preset temperature control program, the temperature in the measurement air chamber 110 is gradually adjusted through the temperature control mechanism 500, the air pressure change and the temperature change in the measurement air chamber 110 are recorded, and a pressure change curve of the gas to be tested along with the temperature change is obtained, namely a pressure-temperature curve is obtained; the steps are repeated in sequence to obtain a pressure-temperature change curve B and n standard measurement curves A of n standard two-component mixed gases 1 ～A n 。
Further, the temperature control mechanism 500 includes a temperature controller 510 and a temperature adjusting member 520 electrically connected to the temperature controller 510, where the temperature adjusting member 520 is disposed on the cylinder 100. The temperature adjusting member 520 is disposed on the cylinder 100 to adjust the temperature of the cylinder 100, thereby adjusting the temperature in the measurement air chamber 110, and the temperature adjusting controller 510 can control the temperature adjusting member 520 to act on the cylinder 100 according to a preset temperature control program. In this embodiment, the temperature adjusting member 520 is a temperature adjusting plate, the shape of the temperature adjusting plate is matched with the outer wall of the cylinder 100, and the temperature adjusting plate is attached to the outer wall of the cylinder 100. Furthermore, the temperature adjusting sheet can be in close contact with the surface of the cylinder 100, and when the temperature adjusting sheet adjusts the temperature, the temperature can directly act on the cylinder 100, so that the temperature adjusting effect is good.
Specifically, the temperature adjusting member 520 may have an electric heating plate, a cooling plate, or the like. In this embodiment, the temperature adjusting member 520 is a semiconductor cooling plate. By adopting the semiconductor refrigeration piece for the temperature adjusting piece 520, on one hand, the semiconductor refrigeration piece has no moving parts and has higher reliability; on the other hand, the semiconductor refrigerating sheet and the temperature-adjusting controller 510 can form a cooling system, in the actual component content measurement process, a cooling program can be preset, the cooling system can gradually reduce the temperature of the measurement air chamber 110 according to the set cooling program, further the phase change process of the gas from the gas state to the liquid state can be simulated, the measurement is realized in the condensation process, and compared with the preset temperature control program of gradually raising, then lowering or gradually lowering and then raising the temperature, the operation is simpler and more convenient, and the measurement is more accurate. Optionally, the number of the semiconductor refrigerating sheets is at least two, and the at least two semiconductor refrigerating sheets are uniformly arranged on the outer wall of the cylinder 100 at intervals, so that the refrigerating effect is good.
In this embodiment, the driving mechanism 300 includes a worm 310, a worm wheel 320, and a driving motor 330, one end of the worm 310 extends into the cylinder 100 and is connected to the piston 200, the driving motor 330 is in driving connection with the worm wheel 320, and the worm wheel 320 is in driving connection with the worm 310. The piston 200 is driven by adopting a worm and gear transmission mode, so that the piston 200 can move to change the volume of the measuring air chamber 110, and the structure is simple and the driving is reliable.
In this embodiment, a sealing ring is disposed between the piston 200 and the cylinder 100. Further, the piston 200 is in sealing connection with the cylinder 100, so that the gas in the measurement gas chamber 110 can be kept within a certain pressure range, and the accuracy of measurement can be improved. Optionally, the sealing ring is an O-shaped ring, so that the sealing effect is good and the cost is low. In this embodiment, the pressure sensor 600 and/or the temperature sensor 700 are/is disposed on the inner wall of the cylinder 100, so that the pressure and/or temperature variation in the measurement air chamber 110 can be directly and accurately tested, and the testing accuracy is high.
Further, the mixed gas component ratio measuring device further comprises a control system 900, wherein the control system 900 is electrically connected with the driving mechanism 300, the temperature control mechanism 500, the pressure sensor 600 and the temperature sensor 700. The control system 900 can control the driving mechanism 300 to move, control the temperature control mechanism 500 to control the temperature in the measurement air chamber 110, so as to adjust the pressure and the temperature in the measurement air chamber 110, and can also collect data detected by the pressure sensor 600 and the temperature sensor 700 in the test process, so as to analyze, calculate and determine the component content ratio of the two-component mixed gas to be tested. Optionally, the control system 900 is a computer, which is convenient to operate. Further, the control system 900 is electrically connected to the temperature controller 510 of the temperature control mechanism 500, and the control system 900 controls the temperature adjusting device 520 to adjust the temperature of the cylinder 100 by controlling the temperature controller 510. The control system 900 is electrically connected to the driving motor 330 of the driving mechanism 300.
As shown in fig. 1 and 2, a method for measuring the proportion of a mixed gas component using the above-described mixed gas component measuring apparatus comprises the steps of:
s1: preparing n parts of standard two-component mixed gas which has the same gas composition as the two-component mixed gas to be detected and different component proportions, wherein n is a positive integer, and n is more than or equal to 2;
s2: the mixed gas component proportion measuring device is adopted to measure the pressure-temperature change of n parts of standard two-component mixed gas after a preset temperature control program is carried out under the preset initial pressure and the preset initial temperature conditions, and n pressure-temperature standard measurement curves A are obtained 1 ～A n Obtaining a standard curve cluster { A };
s3: the mixed gas component proportion measuring device is adopted to measure the pressure-temperature change of the two-component mixed gas to be measured after the temperature control program is carried out under the same initial pressure and the same initial temperature, and a pressure-temperature measuring curve B is obtained;
s4: comparing the pressure-temperature measurement curve B with the standard curve cluster { A }, and obtaining a pressure-temperature standard measurement curve A which is close to the pressure-temperature measurement curve B in the standard curve cluster { A } i Then the pressure-temperature standard measurement curve A i The component ratio of the two different gases is the component ratio of the two-component mixed gas to be detected, wherein i is a positive integer and is more than or equal to 2 and less than or equal to n.
Specifically, in actual operation, the steps S1, S2, S3, and S4 may be sequentially performed, or the steps S3, S1, S2, and S4 may be sequentially performed. The method for measuring the component proportion of the mixed gas adopts the mixed gas component proportion measuring device to measure the component proportion of the two-component mixed gas to be measured, and is simple and accurate. In addition, after the standard curve cluster { a } is obtained, when component measurement is required to be performed on other two-component mixed gas to be measured later, if the two gas components of the other two-component mixed gas to be measured are the same as the two gas components of the standard two-component mixed gas, step S1 and S2 are not required to be performed, step S3 is directly performed to obtain a pressure-temperature measurement curve B 'of the other two-component mixed gas to be measured, and then the pressure-temperature measurement curve B' is compared with the standard curve cluster { a }, and the measurement is performed only once by adopting the mixed gas component proportion measuring device of the embodiment, so that the operation is convenient.
Further, the specific steps of the step S1 are as follows: setting a target gas distribution ratio according to the application requirement of the two-component mixed insulating gas, selecting n different component ratios within a preset range of the target gas distribution ratio, and preparing n standard two-component mixed gas with different component ratios. By taking the application requirement of the two-component mixed insulating gas as a target gas distribution ratio and selecting n different component ratios in a certain range near the target gas distribution ratio, the practical pertinence is stronger, the proportion measurement can be carried out on the two-component mixed insulating gas in the gas insulated electric equipment, the obtained standard curve cluster { A } can be more close to the pressure-temperature measurement curve B, and the accuracy of the component proportion measurement can be further improved.
Further, the specific steps of the step S2 are as follows:
s21: opening the valve 800, controlling the piston 200 to move through the air pipe 400 to discharge all the air in the air cylinder 100 by the driving mechanism 300, controlling the piston 200 to move through the air pipe 400 to suck a certain amount of standard two-component mixed air, and closing the valve 800;
s22: the driving mechanism 300 controls the movement of the piston 200 to adjust the volume of the measuring air chamber 110, and the temperature control mechanism 500 regulates and controls the temperature in the measuring air chamber 110 to enable the 1 st part of standard two-component mixed gas in the measuring air chamber 110 to reach the preset initial pressure and the preset initial temperature;
s23: according to a preset temperature control program, the temperature control mechanism 500 gradually adjusts the temperature in the measurement air chamber 110, and simultaneously records the air pressure change and the temperature change in the measurement air chamber 110 to obtain a pressure-temperature standard measurement curve;
s24: repeating the steps S21-S23 to obtain n pressure-temperature standard measurement curves A 1 ～A n The standard curve cluster { A }.
By adopting the steps, n pressure-temperature standard measurement curves A can be obtained 1 ～A n The operation is simple and convenient. In this embodiment, in step S3, the specific steps for obtaining the pressure-temperature measurement curve B can refer to the above steps S21 to S24, and will not be described herein.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. The mixed gas component proportion measuring method is characterized by adopting a mixed gas component proportion measuring device, wherein the mixed gas component proportion measuring device comprises a cylinder, a piston arranged in the cylinder, a driving mechanism for driving the piston to move, an air pipe, a temperature control mechanism, a pressure sensor and a temperature sensor, the cylinder and the piston form a measuring air chamber with variable volume, one end of the air pipe stretches into the cylinder to be communicated with the measuring air chamber, a valve is arranged on the air pipe, the temperature control mechanism is used for regulating and controlling the temperature in the measuring air chamber, the pressure sensor is used for detecting the pressure in the measuring air chamber, and the temperature sensor is used for detecting the temperature in the measuring air chamber;
the method for measuring the proportion of the components of the mixed gas comprises the following steps:
s1: preparing n parts of standard two-component mixed gas which has the same gas composition as the two-component mixed gas to be detected and different component proportions, wherein n is a positive integer, and n is more than or equal to 2;
s2: measuring the pressure-temperature change of n parts of standard two-component mixed gas subjected to a preset temperature control program under the preset initial pressure and preset initial temperature conditions by adopting a mixed gas component proportion measuring device to obtain n pressure-temperature standard measurement curves A 1 ～A n Obtaining a standard curve cluster { A };
s3: the mixed gas component proportion measuring device is adopted to measure the pressure-temperature change of the two-component mixed gas to be measured after the temperature control program is carried out under the same initial pressure and the same initial temperature, and a pressure-temperature measuring curve B is obtained;
s4: comparing the pressure-temperature measurement curve B with the standard curve cluster { A }, and obtaining a pressure-temperature standard measurement curve A which is close to the pressure-temperature measurement curve B in the standard curve cluster { A } i Then the pressure-temperature standard measurement curve A i The component ratio of the two different gases is the component ratio of the two-component mixed gas to be detected, wherein i is a positive integer and is more than or equal to 2 and less than or equal to n.
2. The method according to claim 1, wherein the temperature control mechanism comprises a temperature control device and a temperature control member electrically connected to the temperature control device, and the temperature control member is disposed on the cylinder.
3. The method according to claim 2, wherein the temperature adjusting member is a temperature adjusting sheet, the shape of the temperature adjusting sheet is matched with the outer wall of the cylinder, and the temperature adjusting sheet is attached to the outer wall of the cylinder.
4. The method for measuring the proportion of components of a mixed gas according to claim 3, wherein the temperature adjusting member is a semiconductor refrigerating plate.
5. The method according to claim 1, wherein the driving mechanism includes a worm, a worm wheel, and a driving motor, one end of the worm extends into the cylinder and is connected to the piston, the driving motor is in driving connection with the worm wheel, and the worm wheel is in driving connection with the worm.
6. The method for measuring the proportion of the components of the mixed gas according to any one of claims 1 to 5, wherein a seal ring is provided between the piston and the cylinder.
7. The method according to any one of claims 1 to 5, wherein the mixed gas component ratio measuring device further comprises a control system electrically connected to the driving mechanism, the temperature control mechanism, the pressure sensor, and the temperature sensor.
8. The method for determining the proportion of components of a mixed gas according to claim 1, wherein the specific steps of the step S1 are as follows:
setting a target gas distribution ratio according to the application requirement of the two-component mixed insulating gas, selecting n different component ratios within a preset range of the target gas distribution ratio, and preparing n standard two-component mixed gas with different component ratios.
9. The method for determining the proportion of components of a mixed gas according to claim 1, wherein the specific steps of the step S2 are as follows:
s21: opening a valve, controlling the piston to move through a gas pipe to discharge all the gas in the cylinder by the driving mechanism, sucking quantitative one part of standard two-component mixed gas by the driving mechanism through the gas pipe, and closing the valve;
s22: the driving mechanism controls the movement of the piston to adjust the volume of the measuring air chamber, and the temperature control mechanism regulates and controls the temperature in the measuring air chamber to enable the 1 st part of standard two-component mixed gas in the measuring air chamber to reach the preset initial pressure and the preset initial temperature;
s23: according to a preset temperature control program, the temperature control mechanism gradually adjusts the temperature in the measuring air chamber, and simultaneously records the air pressure change and the temperature change in the measuring air chamber to obtain a pressure-temperature standard measuring curve;
s24: repeating the steps S21-S23 to obtain n pressure-temperature standard measurement curves A 1 ～A n The standard curve cluster { A }.
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| CN102419330A (en) * | 2011-12-07 | 2012-04-18 | 重庆市电力公司电力科学研究院 | Gas content detection device for hydrogen fluoride HF, and method for the same |
| CN104297431A (en) * | 2014-10-21 | 2015-01-21 | 上海乐研电气科技有限公司 | Online SF6 gas micro-water monitoring device, system and method of high-voltage electrical equipment |
| CN204228686U (en) * | 2014-10-21 | 2015-03-25 | 上海乐研电气科技有限公司 | A kind of high voltage electric equipment SF 6the micro-water on-Line Monitor Device of gas and system |
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