CN109085110B - A one-step ventilation rate standard rod period check device and check method - Google Patents
A one-step ventilation rate standard rod period check device and check method Download PDFInfo
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Abstract
本发明公开了一种一步式通风率标准棒期间核查装置及核查方法，包括定量负压装置、夹具、第一压差传感器、第二压差传感器、第三压差传感器、第一流量传感器以及第二流量传感器，夹具设有第一进气口、出气口、第二进气口，第一流量传感器串联于定量负压装置的进气端与夹具的出气端之间，第一压差传感器、第二压差传感器分别连接于第一流量传感器的出气端、进气端，第二进气口与第二流量传感器相连接，第二压差传感器并联在第一进气口和第二进气口之间，第二流量传感器连接在夹具第二进气口，第三压差传感器连接于第二流量传感器的出气端。两个流量传感器作为标准，分别测量标准棒的总流量与通风流量，一步式完成标准棒量值的测定。
The invention discloses a one-step ventilation rate standard bar checking device and checking method, comprising a quantitative negative pressure device, a clamp, a first differential pressure sensor, a second differential pressure sensor, a third differential pressure sensor, a first flow sensor and For the second flow sensor, the fixture is provided with a first air inlet, an air outlet, and a second air inlet. The first flow sensor is connected in series between the inlet end of the quantitative negative pressure device and the air outlet end of the fixture. The first differential pressure sensor 1. The second differential pressure sensor is respectively connected to the gas outlet end and the intake port of the first flow sensor, the second gas inlet is connected to the second flow sensor, and the second differential pressure sensor is connected in parallel between the first gas inlet and the second gas inlet. Between the gas ports, the second flow sensor is connected to the second air inlet of the fixture, and the third differential pressure sensor is connected to the gas outlet of the second flow sensor. Two flow sensors are used as standards to measure the total flow and ventilation flow of the standard rod respectively, and complete the determination of the value of the standard rod in one step.
Description
技术领域technical field
本发明属于卷烟检测仪器标准件校准技术领域，具体涉及一种一步式通风率标准棒期间核查装置及核查方法。The invention belongs to the technical field of calibration of standard parts of cigarette testing instruments, and in particular relates to a one-step ventilation rate standard bar checking device and checking method.
背景技术Background technique
卷烟通风率包括滤嘴通风率、纸通风率、总通风率，通常采用卷烟通风率测定仪和卷烟物理性能综合测试台测量，卷烟通风率大小不仅影响卷烟产品的内在质量，还会改变烟气参数。通风率标准棒是卷烟通风率检测仪器上使用的标准件，通风率标准棒决定着卷烟通风率测量数据准确性，按要求每年检定一次，以保证通风率标准棒量值的溯源性。Cigarette ventilation rate includes filter tip ventilation rate, paper ventilation rate, and total ventilation rate. It is usually measured by cigarette ventilation rate tester and cigarette physical performance comprehensive test bench. Cigarette ventilation rate not only affects the internal quality of cigarette products, but also changes the smoke quality. parameter. The ventilation rate standard rod is a standard part used in the cigarette ventilation rate testing instrument. The ventilation rate standard rod determines the accuracy of the cigarette ventilation rate measurement data. It is calibrated once a year as required to ensure the traceability of the ventilation rate standard rod value.
很多企业认为，只要对通风率标准棒进行定期检定，通风率标准棒量值就是可靠不变的。然而实际上，通风率标准棒在检定周期内，若保存不慎和使用不当，会导致通风率标准棒计量性能发生变化，并不能保证通风率标准棒检定状态的持续可信。因此，需要在检定周期内对通风率标准棒进行期间核查，通过期间核查，能及时发现通风率标准棒的量值失准，并缩短失准后的追溯时间，以提高卷烟通风率测量数据的可信度，降低通风率标准棒检定状态发生异常变化带来的风险。Many enterprises believe that as long as the ventilation rate standard rod is regularly verified, the value of the ventilation rate standard rod is reliable and unchanged. However, in practice, if the ventilation rate standard rod is stored or used improperly during the verification period, the measurement performance of the ventilation rate standard rod will change, which cannot guarantee the continuous reliability of the verification status of the ventilation rate standard rod. Therefore, it is necessary to carry out interim checks on the ventilation rate standard rods during the verification period. Through the interim checks, the inaccuracy of the value of the ventilation rate standard rods can be found in time, and the retrospective time after the inaccuracy can be shortened to improve the reliability of the cigarette ventilation rate measurement data. Reliability, reducing the risk of abnormal changes in the verification status of the ventilation rate standard rod.
目前，烟草行业普遍采用皂膜流量计作为标准对通风率标准棒进行检定，但没有相应的期间核查标准装置及核查方法。因此，有必要研制一套可靠性强、效率高的通风率标准棒期间核查标准装置，并建立相应的通风率标准棒核查方法。At present, the tobacco industry generally uses a soap film flowmeter as a standard to verify the ventilation rate standard rod, but there is no corresponding standard device and method for checking during the period. Therefore, it is necessary to develop a set of reliable and high-efficiency ventilation rate standard rod verification standard device, and establish a corresponding ventilation rate standard rod verification method.
发明内容Contents of the invention
基于现有技术的不足，本发明的目的在于提供一种一步式通风率标准棒期间核查标准装置及核查方法。Based on the deficiencies of the prior art, the object of the present invention is to provide a one-step ventilation rate standard rod checking standard device and checking method.
一种一步式通风率标准棒期间核查装置，包括产生恒定负压气流的定量负压装置、夹持标准棒的夹具、第一压差传感器、第二压差传感器、第三压差传感器、第一流量传感器以及第二流量传感器，所述夹具的两端部分别设有第一进气口和出气口，其侧面设有第二进气口，所述第一流量传感器串联于定量负压装置的进气端与夹具的出气端之间，所述第一压差传感器、第二压差传感器分别连接于第一流量传感器的出气端、进气端，第二进气口与所述第二流量传感器相连接，所述第二压差传感器并联在第一进气口和第二进气口之间，所述第二流量传感器连接在夹具第二进气口，所述第三压差传感器连接于第二流量传感器的出气端。A one-step ventilation rate standard rod verification device, including a quantitative negative pressure device that generates a constant negative pressure airflow, a clamp for holding a standard rod, a first differential pressure sensor, a second differential pressure sensor, a third differential pressure sensor, and a second differential pressure sensor. A flow sensor and a second flow sensor, the two ends of the clamp are respectively provided with a first air inlet and an air outlet, and the side is provided with a second air inlet, and the first flow sensor is connected in series with the quantitative negative pressure device Between the air inlet end of the clamp and the air outlet end of the fixture, the first differential pressure sensor and the second differential pressure sensor are respectively connected to the air outlet end and the air inlet end of the first flow sensor, and the second air inlet is connected to the second air inlet The flow sensor is connected, the second differential pressure sensor is connected in parallel between the first air inlet and the second air inlet, the second flow sensor is connected to the second air inlet of the fixture, and the third differential pressure sensor Connect to the outlet port of the second flow sensor.
所述定量负压装置包括真空发生器、音速喷嘴以及过滤调压阀，所述真空发生器正压端与过滤调压阀连接，所述音速喷嘴出气口与真空发生器负压端连接，所述夹具的出气口与音速喷嘴吸气口相连接。The quantitative negative pressure device includes a vacuum generator, a sonic nozzle and a filter pressure regulating valve, the positive pressure end of the vacuum generator is connected to the filter pressure regulating valve, and the gas outlet of the sonic nozzle is connected to the negative pressure end of the vacuum generator. The air outlet of the fixture is connected with the air inlet of the sonic nozzle.
所述标准棒为圆柱体结构，其包括进气端面、出气端面、外圆柱面，总毛细管孔贯穿于出气端面和进气端面之间，外圆柱面靠近出气端面部位设有通风毛细管孔，通风毛细管孔与总毛细管孔相贯通。The standard rod is a cylindrical structure, which includes an air inlet end face, an air outlet end face, and an outer cylindrical surface. The total capillary hole runs through between the air outlet end face and the air inlet end face, and the outer cylindrical surface is provided with a ventilation capillary hole near the air outlet end face. The capillary holes communicate with the total capillary holes.
所述第一流量传感器和第二流量传感器均为活塞式体积流量传感器或热式流量传感器，其准确度不低于1.0级，附带气体温度、大气压力测量装置。The first flow sensor and the second flow sensor are both piston type volumetric flow sensors or thermal flow sensors, the accuracy of which is not lower than grade 1.0, and gas temperature and atmospheric pressure measurement devices are attached.
所述第一压差传感器、第二压差传感器以及第三压差传感器的准确度不低于0.1级。The accuracy of the first differential pressure sensor, the second differential pressure sensor and the third differential pressure sensor is not lower than 0.1 grade.
一种标准棒通风率核查方法，包括以下步骤：A method for checking the ventilation rate of a standard rod, comprising the following steps:
S1：将标准棒安装入夹具中，通风毛细管孔对应夹具的第二进气口，夹具的靠近的第一进气口处的内壁与标准棒的外圆柱面密封；S1: Install the standard rod into the fixture, the ventilation capillary hole corresponds to the second air inlet of the fixture, and the inner wall near the first air inlet of the fixture is sealed with the outer cylindrical surface of the standard rod;
S2：通风流量测量，稳压气源进入过滤调压阀，调压后的压缩空气在真空发生器的作用下，产生负压，负压空气流经固定尺寸的音速喷嘴后，在音速喷嘴进气端出现恒定流量，第一流量传感器用于测量音速喷嘴进气端的准确流量值；在恒定流量的抽吸过程中，一路气体从标准棒的进气端面流入，另一路气体经第二流量传感器、标准棒的通风毛细管孔流入；第一压差传感器用于测量第一流量传感器出气端的压力值，第二压差传感器用于测量夹具出气端的压力值，第三压差传感器用于第二测量流量传感器出气端的压力值；S2: Ventilation flow measurement, the regulated air source enters the filter pressure regulating valve, and the compressed air after pressure regulation generates negative pressure under the action of the vacuum generator. After the negative pressure air flows through the sonic nozzle of fixed size, it enters the sonic nozzle There is a constant flow at the gas end, and the first flow sensor is used to measure the accurate flow value at the inlet end of the sonic nozzle; during the suction process of constant flow, one path of gas flows in from the inlet end of the standard rod, and the other path of gas passes through the second flow sensor , The ventilation capillary hole of the standard rod flows in; the first differential pressure sensor is used to measure the pressure value of the outlet end of the first flow sensor, the second differential pressure sensor is used to measure the pressure value of the outlet end of the fixture, and the third differential pressure sensor is used for the second measurement The pressure value at the gas outlet of the flow sensor;
S3待通过标准棒的流量稳定后，记录第一流量传感器、第二流量传感器的流量示值分别为Q1、Q2，第一压差传感器、第二压差传感器、第三压差传感器的压力示值分别为P1、PD、P2，此时大气压力为P；S3 After the flow through the standard rod is stabilized, record the flow indication values of the first flow sensor and the second flow sensor as Q 1 and Q 2 respectively, and the values of the first differential pressure sensor, the second differential pressure sensor, and the third differential pressure sensor The pressure indications are P 1 , P D , P 2 respectively, and the atmospheric pressure is P at this time;
标准棒的总流量Q如下，The total flow Q of the standard rod is as follows,
标准棒的通风流量QV如下，The ventilation flow Q V of the standard rod is as follows,
标准棒的通风率V如下，The ventilation rate V of the standard rod is as follows,
本发明的有益效果：本发明采用两个流量传感器作为标准，分别用于测量通风率标准棒的总流量与通风流量，一步式完成通风率标准棒量值的测定，测量可靠性强，工作效率高。Beneficial effects of the present invention: the present invention adopts two flow sensors as standards, which are respectively used to measure the total flow rate and ventilation flow rate of the ventilation rate standard rod, and completes the determination of the value of the ventilation rate standard rod in one step, with strong measurement reliability and high work efficiency. high.
附图说明Description of drawings
图1是实施例的结构示意图；Fig. 1 is the structural representation of embodiment;
图2是标准棒结构示意图；Fig. 2 is a schematic diagram of a standard rod structure;
图3是标准棒截面放大示意图；Fig. 3 is the enlarged schematic diagram of the section of the standard rod;
图中：1、过滤调压阀，2、真空发生器，3、音速喷嘴，4、第一压差传感器，5、第一流量传感器，6、第二压差传感器，7、夹具，8、标准棒，9、第二流量传感器，10、第三压差传感器，11、外圆柱面，12、出气端面，13、进气端面，14、总毛细管孔，15、通风毛细管孔。In the figure: 1. Filter pressure regulating valve, 2. Vacuum generator, 3. Sonic nozzle, 4. First differential pressure sensor, 5. First flow sensor, 6. Second differential pressure sensor, 7. Fixture, 8. Standard rod, 9, the second flow sensor, 10, the third differential pressure sensor, 11, the outer cylindrical surface, 12, the air outlet end face, 13, the air inlet end face, 14, the total capillary hole, 15, the ventilation capillary hole.
具体实施方式Detailed ways
以下由特定的具体实施例说明本发明的实施方式，熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本发明的其他优点及功效。The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
请参阅图1。本说明书所附图所绘示的结构、比例、大小等，均仅用以配合说明书所揭示的内容，以供熟悉此技术的人士了解与阅读，并非用以限定本发明可实施的限定条件，故不具技术上的实质意义，任何结构的修饰、比例关系的改变或大小的调整，在不影响本发明所能产生的功效及所能达成的目的下，均应仍落在本发明所揭示的技术内容能涵盖的范围内。同时，本说明书中所引用的如“上”、“下”、“左”、“右”、“中间”及“一”等的用语，亦仅为便于叙述的明了，而非用以限定本发明可实施的范围，其相对关系的改变或调整，在无实质变更技术内容下，当亦视为本发明可实施的范畴。See Figure 1. The structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to cooperate with the content disclosed in the specification for the understanding and reading of those who are familiar with this technology, and are not used to limit the conditions for the implementation of the present invention. Therefore, there is no technical substantive meaning, and any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the disclosure of the present invention without affecting the functions and objectives of the present invention. within the scope of technical content. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable scope of the invention and the change or adjustment of its relative relationship shall also be regarded as the practicable scope of the present invention without any substantial change in the technical content.
如图1所示，一种一步式通风率标准棒期间核查装置，包括产生恒定负压气流的定量负压装置、夹持标准棒8的夹具7、第一压差传感器4、第二压差传感器6、第三压差传感器10、第一流量传感器5以及第二流量传感器9，其准确度不低于0.5级，附带气体温度、大气压力测量装置。所述第一压差传感器4和第二压差传感器6的准确度不低于0.1级。As shown in Figure 1, a one-step ventilation rate standard rod check device includes a quantitative negative pressure device that generates a constant negative pressure airflow, a clamp 7 that holds a standard rod 8, a first differential pressure sensor 4, a second differential pressure The accuracy of the sensor 6, the third differential pressure sensor 10, the first flow sensor 5 and the second flow sensor 9 is not lower than 0.5, and gas temperature and atmospheric pressure measurement devices are attached. The accuracy of the first differential pressure sensor 4 and the second differential pressure sensor 6 is not lower than 0.1 grade.
所述夹具7的两端部分别设有第一进气口71和出气口，其侧面设有第二进气口72，所述第一流量传感器5串联于定量负压装置的进气端与夹具7的出气端之间，所述第一压差传感器4、第二压差传感器6分别连接于第一流量传感器5的出气端、进气端，第二进气口72与所述第二流量传感器9相连接，所述第二压差传感器6并联在第一进气口71和第二进气口72之间，所述第二流量传感器9连接在夹具7第二进气口72，所述第三压差传感器10连接于第二流量传感器9的出气端。Both ends of the clamp 7 are respectively provided with a first air inlet 71 and an air outlet, and its side is provided with a second air inlet 72, and the first flow sensor 5 is connected in series with the air inlet and the air inlet of the quantitative negative pressure device. Between the gas outlet ends of the fixture 7, the first differential pressure sensor 4 and the second differential pressure sensor 6 are respectively connected to the gas outlet port and the gas inlet port of the first flow sensor 5, and the second gas inlet port 72 is connected to the second gas inlet port. The flow sensor 9 is connected, the second differential pressure sensor 6 is connected in parallel between the first air inlet 71 and the second air inlet 72, and the second flow sensor 9 is connected to the second air inlet 72 of the fixture 7, The third differential pressure sensor 10 is connected to the gas outlet of the second flow sensor 9 .
所述定量负压装置包括真空发生器2、音速喷嘴3以及过滤调压阀1，所述真空发生器2正压端与过滤调压阀1连接，所述音速喷嘴3出气口与真空发生器2负压端连接，所述夹具7的出气口与音速喷嘴3吸气口相连接。The quantitative negative pressure device includes a vacuum generator 2, a sonic nozzle 3 and a filter pressure regulating valve 1, the positive pressure end of the vacuum generator 2 is connected with the filter pressure regulating valve 1, and the gas outlet of the sonic nozzle 3 is connected to the vacuum generator 2 connected to the negative pressure end, and the air outlet of the clamp 7 is connected to the air inlet of the sonic nozzle 3 .
如图2、图3所示，所述标准棒8为圆柱体结构，其包括进气端面13、出气端面12、外圆柱面11，总毛细管孔14贯穿于出气端面12和进气端面13之间，外圆柱面11靠近出气端面12部位设有通风毛细管孔15，通风毛细管孔15与总毛细管孔14相贯通。As shown in Figures 2 and 3, the standard rod 8 is a cylindrical structure, which includes an air inlet end face 13, an air outlet end face 12, and an outer cylindrical surface 11, and the total capillary hole 14 runs through the air outlet end face 12 and the air inlet end face 13. In between, the outer cylindrical surface 11 is provided with a ventilation capillary hole 15 near the air outlet end surface 12, and the ventilation capillary hole 15 communicates with the total capillary hole 14.
标准棒8工作过程中，测试空气从通风毛细管孔15与进气端面13流入，两路空气汇聚后从出气端面12的总毛细管孔14流出。通风毛细管孔15流入的空气流量与总毛细管孔14流出的空气流量之比即为标准棒8的通风率。标准棒8通风率量值范围为0～100％，通常使用的量值为20％、50％、80％。During the working process of the standard rod 8 , the test air flows in from the ventilation capillary hole 15 and the air inlet end surface 13 , and the two paths of air flow out from the total capillary hole 14 of the air outlet end surface 12 after converging. The ratio of the air flow inflow of the ventilation capillary hole 15 to the air flow outflow of the total capillary hole 14 is the ventilation rate of the standard rod 8 . The ventilation rate of the standard rod 8 ranges from 0 to 100%, and the commonly used values are 20%, 50%, and 80%.
一种标准棒通风率核查方法，包括以下步骤：A method for checking the ventilation rate of a standard rod, comprising the following steps:
S1：将标准棒8安装入夹具7中，通风毛细管孔对应夹具7的第二进气口72，夹具7的靠近的第一进气口71处的内壁与标准棒8的外圆柱面密封；S1: Install the standard rod 8 into the fixture 7, the ventilation capillary hole corresponds to the second air inlet 72 of the fixture 7, and the inner wall of the first air inlet 71 close to the fixture 7 is sealed with the outer cylindrical surface of the standard rod 8;
S2：如图1所示，通风流量测量，稳压气源进入过滤调压阀1，调压后的压缩空气在真空发生器2的作用下，产生负压，负压空气流经固定尺寸的音速喷嘴3后，在音速喷嘴3进气端出现恒定流量，第一流量传感器5用于测量音速喷嘴3进气端的准确流量值；在恒定流量的抽吸过程中，一路气体从标准棒8的进气端面流入，另一路气体经第二流量传感器9、标准棒8的通风毛细管孔流入；第一压差传感器4用于测量第一流量传感器5出气端的压力值，第二压差传感器6用于测量夹具7出气端的压力值，第三压差传感器10用于第二测量流量传感器出气端的压力值；S2: As shown in Figure 1, the ventilation flow rate is measured, the regulated air source enters the filter pressure regulating valve 1, and the compressed air after pressure regulation generates negative pressure under the action of the vacuum generator 2, and the negative pressure air flows through the fixed size After the sonic nozzle 3, a constant flow occurs at the inlet end of the sonic nozzle 3, and the first flow sensor 5 is used to measure the accurate flow value of the inlet end of the sonic nozzle 3; The air inlet end surface flows in, and the other gas flows in through the ventilation capillary hole of the second flow sensor 9 and the standard rod 8; the first differential pressure sensor 4 is used to measure the pressure value of the gas outlet end of the first flow sensor 5, and the second differential pressure sensor 6 is used for For measuring the pressure value of the outlet end of the fixture 7, the third differential pressure sensor 10 is used for the second measurement of the pressure value of the outlet end of the flow sensor;
S3待通过标准棒8的流量稳定后，记录第一流量传感器5、第二流量传感器9的流量示值分别为Q1、Q2，第一压差传感器4、第二压差传感器6、第三压差传感器10的压力示值分别为P1、PD、P2，此时大气压力为P；S3 After the flow through the standard rod 8 is stabilized, record the flow indication values of the first flow sensor 5 and the second flow sensor 9 as Q 1 and Q 2 respectively, the first differential pressure sensor 4 , the second differential pressure sensor 6 , the second differential pressure sensor The pressure indications of the three differential pressure sensors 10 are respectively P 1 , PD , and P 2 , and the atmospheric pressure is P at this time;
标准棒8的总流量Q如下：The total flow Q of the standard rod 8 is as follows:
标准棒8的通风流量QV如下：The ventilation flow Q V of the standard rod 8 is as follows:
标准棒8的通风率V如下：The ventilation rate V of the standard rod 8 is as follows:
本标准棒8期间核查装置采用两个流量传感器作为标准，分别用于测量通风率标准棒8的总流量与通风流量，一步式完成通风率标准棒8量值的测定，测量可靠性强，工作效率高。The verification device during the standard rod 8 uses two flow sensors as a standard, which are used to measure the total flow rate and ventilation flow of the ventilation rate standard rod 8 respectively, and complete the determination of the value of the ventilation rate standard rod 8 in one step. The measurement reliability is strong and the work efficient.
上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改变。因此，举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利要求所涵盖。The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.
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