CN204330535U - A kind of double capillary viscosity meter for High Temperature High Pressure - Google Patents
A kind of double capillary viscosity meter for High Temperature High Pressure Download PDFInfo
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Abstract
一种用于高温高压的双毛细管粘度计，所述粘度计包括恒流泵、双毛细管路、恒温系统、数据信号测量及采集系统和背压阀；其测试方法为：先将相同尺寸的双毛细管串联置于温度T0的恒温环境，标准流体以一定体积流量依次流经双毛细管并测量管路压降，再将双毛细管分别置于T0和T的恒温环境，测量标准流体流经双管压降，然后将双毛细管置于T0的恒温环境，测量被测流体相同体积流量流经双管压降，再将双毛细管分别置于T0和T的恒温环境，测量标准流体流经双管压降，最后计算粘度；本实用新型的双毛细管粘度计测试方法简单，测量精度高，可实现高温高压条件下流体动力粘度的在线测量。
A double capillary viscometer for high temperature and high pressure, the viscometer includes a constant flow pump, a double capillary pipeline, a constant temperature system, a data signal measurement and acquisition system and a back pressure valve; The capillary tubes are placed in a constant temperature environment with a temperature of T 0 in series. The standard fluid flows through the double capillary tubes in sequence at a certain volume flow rate and the pressure drop of the pipeline is measured. Then place the double capillary in a constant temperature environment of T 0 , measure the pressure drop of the same volume flow of the measured fluid flowing through the double tube, then place the double capillary in a constant temperature environment of T 0 and T respectively, measure the flow of the standard fluid Double-tube pressure drop, and finally calculate the viscosity; the double-capillary viscometer of the utility model has a simple test method and high measurement accuracy, and can realize online measurement of fluid dynamic viscosity under high temperature and high pressure conditions.
Description
技术领域technical field
本实用新型流体粘度测量技术领域，具体涉及一种用于高温高压的双毛细管粘度计。The utility model relates to the technical field of fluid viscosity measurement, in particular to a double capillary viscometer for high temperature and high pressure.
背景技术Background technique
粘度是流体重要的物理性质之一，是用来表征流体粘性程度的物理量。粘度测量在石油、化工、交通、冶金、医药、食品、建材及国防等领域中发挥着重要的作用。目前粘度测量方法主要包括有毛细管法、落体法、旋转法、振动法和超声波法等。Viscosity is one of the important physical properties of fluid, and it is a physical quantity used to characterize the degree of fluid viscosity. Viscosity measurement plays an important role in the fields of petroleum, chemical industry, transportation, metallurgy, medicine, food, building materials and national defense. At present, the viscosity measurement methods mainly include capillary method, falling body method, rotation method, vibration method and ultrasonic method.
旋转法的原理是通过测量流体作用于物体的粘性力矩或物体的转速来确定流体的粘度。由于其可以在不同的切变率下对同种材料进行测量的优点，被广泛应用于测量牛顿液体和非牛顿液体的粘度及流变特性。缺点是所需的硬件设备较多，结构复杂，价格较昂贵。The principle of the rotation method is to determine the viscosity of the fluid by measuring the viscous moment of the fluid acting on the object or the rotational speed of the object. Due to its advantage of being able to measure the same material at different shear rates, it is widely used to measure the viscosity and rheological properties of Newtonian and non-Newtonian liquids. The disadvantage is that the required hardware equipment is more, the structure is complicated, and the price is more expensive.
落体法的原理是利用物体在液体中下落所受到的阻力来测定流体的粘度。特点是结构简单，可较为方便的进行高粘度流体粘度的测量。缺点是只适合测量密度比较大的牛顿流体；测量不透明液体粘度时，需要用到特性的感应装置。The principle of the falling body method is to use the resistance of an object falling in a liquid to measure the viscosity of a fluid. The characteristic is that the structure is simple, and the viscosity of high-viscosity fluid can be measured more conveniently. The disadvantage is that it is only suitable for measuring Newtonian fluids with relatively high density; when measuring the viscosity of opaque liquids, a characteristic sensing device is required.
振动法主要包括旋转振动粘度计和振动片粘度计等类型。旋转振动粘度计从振动体的振动周期和对数衰减率求得衰减常数从而获得粘度；振动片粘度计主要通过测量薄片在流体中振动的振幅计算获得粘度的大小。一般情况下，振动法测量适用于低粘度和小量流体样品的测量。Vibration methods mainly include rotary vibration viscometers and vibrating plate viscometers. The rotational vibration viscometer obtains the viscosity by obtaining the decay constant from the vibration period and the logarithmic decay rate of the vibrating body; the vibrating plate viscometer mainly calculates the viscosity by measuring the vibration amplitude of the sheet in the fluid. In general, the vibration method is suitable for the measurement of low viscosity and small amount of fluid samples.
超声波法是利用超声波在固体和液体两种介质表面发生反射，捕获反射波能量衰减特性间接获得液体粘度的方法。超声波法可以实现无损伤在线检测，具有快速、实时性好的优点。但技术要求较高，成本昂贵且发展不成熟。Ultrasonic method is a method that uses ultrasonic waves to reflect on the surface of two media, solid and liquid, and captures the energy attenuation characteristics of the reflected waves to indirectly obtain the viscosity of the liquid. Ultrasonic method can realize non-destructive online detection, and has the advantages of fast and good real-time performance. But the technical requirements are high, the cost is expensive and the development is immature.
毛细管法测量液体粘度是基于哈根-泊肃叶(Hagen-Poiseuille)定律，根据毛细管两端的压强差，毛细管长及毛细管内径，液体流经毛细管的体积等参数求得液体的粘度值。毛细管粘度计因其测量精度高，结构简单，成为目前液体粘度测量中应用最广的一种粘度计。毛细管法可分为绝对测量和相对测量，相对测量因其不需要对毛细管的尺寸、流量、压力各个参数进行测量，过程相对简单而得到广泛的应用研究。The capillary method for measuring liquid viscosity is based on the Hagen-Poiseuille (Hagen-Poiseuille) law. According to the pressure difference between the two ends of the capillary, the length of the capillary, the inner diameter of the capillary, and the volume of the liquid flowing through the capillary, the viscosity of the liquid is obtained. Due to its high measurement accuracy and simple structure, capillary viscometer has become the most widely used viscometer in liquid viscosity measurement. The capillary method can be divided into absolute measurement and relative measurement. The relative measurement is widely used because it does not need to measure the size, flow and pressure of the capillary, and the process is relatively simple.
多毛细管粘度测量是相对测量方法中的一种，专利1143187披露了一种两管式乌氏粘度计；专利US6745615披露了一种利用渐减的压力差在多个剪切率上测定非牛顿流体粘度的双立管/单毛细管粘度计；1390302专利CN1869642披露了一种恒压、可调速的两管式毛细管粘度计；专利US4463598披露了一种等臂桥式两毛细管粘度计；专利US7334457披露了一种回路中增添阀通过改变测量回路流动路径改进流体压差感测的多毛细管粘度测量系统及方法。现有多毛细管粘度计大都属于离线测量，不能满足不同状态参数特别是高压高温条件下流体粘度的在线测量。Multi-capillary viscosity measurement is one of relative measurement methods. Patent 1143187 discloses a two-tube Ubbelohde viscometer; Viscosity double standpipe/single capillary viscometer; 1390302 patent CN1869642 discloses a constant pressure, adjustable speed two-tube capillary viscometer; patent US4463598 discloses an equi-arm bridge type two capillary viscometer; A multi-capillary viscosity measurement system and method for improving fluid pressure differential sensing by adding a valve in the circuit by changing the flow path of the measurement circuit is provided. Most of the existing multi-capillary viscometers belong to offline measurement, which cannot meet the online measurement of fluid viscosity under different state parameters, especially under high pressure and high temperature conditions.
发明内容Contents of the invention
为了克服上述现有技术存在的问题，本实用新型的目的在于提供一种用于高温高压的双毛细管粘度计，该双毛细管粘度计测量精度高，测量方法简单。In order to overcome the above-mentioned problems in the prior art, the purpose of this utility model is to provide a dual-capillary viscometer for high temperature and high pressure, which has high measurement accuracy and simple measurement method.
为了实现上述实用新型目的，本实用新型采取的技术方案是：In order to realize above-mentioned utility model purpose, the technical scheme that the utility model takes is:
一种用于高温高压的双毛细管粘度计，包括与试剂瓶1连接的恒流泵2，与恒流泵2连接的测量管路，在恒流泵2与测量管路连接的管路上设置有调节阀3和过滤器4，所述测量管路包括上游测量管路和下游测量管路，下游测量管路通过冷凝器29连接收液瓶31，在冷凝器29与收液瓶31连接的管路上设置有精密背压阀30；所述上游测量管路包括以盘管的形式置于上游恒温器12中的上游测试用毛细管7；所述上游恒温器12包括设置于上游测试用毛细管7入口处的上游测温温度计6，放置在上游恒温器12内的上游加热丝10，与上游加热丝10连接的上游直流加热电源9，与上游测试用毛细管7和上游直流加热电源9连接的上游PID恒温控制器11；所述上游测试用毛细管7管路两端分别设置上游第一压力传感器14和上游第二压力传感器15，所述上游第一压力传感器14和上游第二压力传感器15间设置上游差压传感器13；所述下游测量管路包括以盘管的形式置于下游恒温器22中的下游测试用毛细管20；所述下游恒温器22包括设置于下游测试用毛细管20入口处的下游测温温度计18，放置在下游恒温器22内的下游加热丝23，与下游加热丝23连接的下游直流加热电源21，与下游测试用毛细管20和下游直流加热电源21连接的下游PID恒温控制器24，还包括伸入下游恒温器22内的搅拌器25；所述下游测试用毛细管20管路两端分别设置下游第一压力传感器27和下游第二压力传感器28，所述下游第一压力传感器27和下游第二压力传感器28间设置下游差压传感器26；还包括与所述上游测温温度计6、下游测温温度计18、上游PID恒温控制器11、下游PID恒温控制器24、上游差压传感器13、上游第一压力传感器14、上游第二压力传感器15、下游差压传感器26、下游第一压力传感器27和下游第二压力传感器28连接的采集系统16。A double-capillary viscometer for high temperature and high pressure, comprising a constant flow pump 2 connected to a reagent bottle 1, a measuring pipeline connected to the constant flow pump 2, and a pipeline connected to the constant flow pump 2 and the measuring pipeline is provided with Regulating valve 3 and filter 4, described measuring pipeline comprises upstream measuring pipeline and downstream measuring pipeline, and downstream measuring pipeline is connected liquid collection bottle 31 through condenser 29, and the pipe that condenser 29 is connected with liquid collection bottle 31 A precision back pressure valve 30 is arranged on the road; the upstream measurement pipeline includes an upstream testing capillary 7 placed in an upstream thermostat 12 in the form of a coil; the upstream thermostat 12 includes an inlet of the upstream testing capillary 7 The upstream temperature measuring thermometer 6 at the upstream thermostat 12, the upstream heating wire 10 placed in the upstream thermostat 12, the upstream DC heating power supply 9 connected to the upstream heating wire 10, the upstream PID connected to the upstream testing capillary 7 and the upstream DC heating power supply 9 Constant temperature controller 11; the two ends of the upstream testing capillary 7 pipeline are respectively provided with an upstream first pressure sensor 14 and an upstream second pressure sensor 15, and an upstream pressure sensor 14 and an upstream second pressure sensor 15 are arranged between the upstream Differential pressure sensor 13; The downstream measurement pipeline includes a downstream test capillary 20 placed in a downstream thermostat 22 in the form of a coil; Thermometer 18, the downstream heating wire 23 placed in the downstream thermostat 22, the downstream DC heating power supply 21 connected with the downstream heating wire 23, the downstream PID constant temperature controller 24 connected with the downstream test capillary 20 and the downstream DC heating power supply 21 , and also include a stirrer 25 extending into the downstream thermostat 22; the downstream testing capillary 20 pipeline ends are respectively provided with a downstream first pressure sensor 27 and a downstream second pressure sensor 28, and the downstream first pressure sensor 27 Set the downstream differential pressure sensor 26 between the second downstream pressure sensor 28; also include the upstream temperature measuring thermometer 6, the downstream temperature measuring thermometer 18, the upstream PID constant temperature controller 11, the downstream PID constant temperature controller 24, the upstream differential pressure sensor 13. The acquisition system 16 connected with the upstream first pressure sensor 14 , the upstream second pressure sensor 15 , the downstream differential pressure sensor 26 , the downstream first pressure sensor 27 and the downstream second pressure sensor 28 .
所述上游测试用毛细管7和下游测试用毛细管20的尺寸相同。The size of the upstream testing capillary 7 and the downstream testing capillary 20 are the same.
所述恒流泵2能够提供0.01-9.99ml/min液态体积流量的稳定输出。The constant flow pump 2 can provide a stable output of 0.01-9.99ml/min liquid volume flow.
所述上游测试用毛细管7之间及其与前后流通管路、压力测量管路之间采用上游三通接头8连接，所述下游测试用毛细管20之间及其与前后流通管路、压力测量管路之间采用下游三通接头19连接。The upstream three-way joint 8 is used to connect between the capillary tubes 7 of the upstream test and the front and rear circulation pipelines and the pressure measurement pipeline. The pipelines are connected by a downstream three-way joint 19.
所述上游测试用毛细管7和下游测试用毛细管20以螺旋方式缠绕在直径为150mm的不锈钢金属圆柱上水平放置，进出口留有100mm的直管段。The upstream test capillary 7 and the downstream test capillary 20 are spirally wound on a stainless steel metal cylinder with a diameter of 150 mm and placed horizontally, leaving a 100 mm straight pipe section at the inlet and outlet.
所述上游测试用毛细管7的进口前布置一段长度为300mm，材质和管径与上游测试用毛细管7相同的上游预热毛细管5，所述下游测试用毛细管20的进口前布置一段长度为300mm，材质和管径与下游测试用毛细管20相同的下游预热毛细管17。The entrance of the upstream test capillary 7 is arranged with a length of 300mm, the upstream preheating capillary 5 with the same material and pipe diameter as the upstream test capillary 7, and the entrance of the downstream test capillary 20 is arranged with a length of 300mm. A downstream preheating capillary 17 having the same material and diameter as the downstream testing capillary 20 .
所述下游恒温器22采用水浴加热法，恒定温度设置在25℃；所述下游恒温器22的加热分为两个步骤：25-240℃采用油浴加热法，高于240℃采用熔盐浴加热法。The downstream thermostat 22 adopts a water bath heating method, and the constant temperature is set at 25° C.; the heating of the downstream thermostat 22 is divided into two steps: 25-240° C. adopts an oil bath heating method, and uses a molten salt bath above 240° C. Heating method.
所述上游测试用毛细管7和下游测试用毛细管20由316不锈钢材质加工成型，管长为3100mm，截面为圆形，名义内径250μm，管径均匀。The capillary 7 for upstream testing and the capillary 20 for downstream testing are made of 316 stainless steel, with a tube length of 3100 mm, a circular section, a nominal inner diameter of 250 μm, and a uniform tube diameter.
本实用新型和现有技术相比，具有如下优点：Compared with the prior art, the utility model has the following advantages:
1、通过标准流体和被测流体间压力信号的对比关系可以直接得到被测流体的动力粘度，测试方法简单，重复性好，测量精度高。1. The dynamic viscosity of the measured fluid can be directly obtained through the comparison of the pressure signal between the standard fluid and the measured fluid. The test method is simple, the repeatability is good, and the measurement accuracy is high.
2、本实用新型方法可以实现流体在不同状态参数(特别是高压高温苛刻条件)下动力粘度的在线测量。2. The method of the utility model can realize online measurement of fluid dynamic viscosity under different state parameters (especially high pressure, high temperature and harsh conditions).
附图说明Description of drawings
附图为本实用新型的结构示意图。Accompanying drawing is the structural representation of the utility model.
具体实施方式Detailed ways
以下结合附图及具体实施例，对本实用新型作进一步的详细描述。Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.
如附图所示，本实用新型一种用于高温高压的双毛细管粘度计，包括与试剂瓶1连接的恒流泵2，与恒流泵2连接的测量管路，在恒流泵2与测量管路连接的管路上设置有调节阀3和过滤器4，所述测量管路包括上游测量管路和下游测量管路，下游测量管路通过冷凝器29连接收液瓶31，在冷凝器29与收液瓶31连接的管路上设置有精密背压阀30；所述上游测量管路包括以盘管的形式置于上游恒温器12中的上游测试用毛细管7；所述上游恒温器12包括设置于上游测试用毛细管7入口处的上游测温温度计6，放置在上游恒温器12内的上游加热丝10，与上游加热丝10连接的上游直流加热电源9，与上游测试用毛细管7和上游直流加热电源9连接的上游PID恒温控制器11；所述上游测试用毛细管7管路两端分别设置上游第一压力传感器14和上游第二压力传感器15，所述上游第一压力传感器14和上游第二压力传感器15间设置上游差压传感器13；所述下游测量管路包括以盘管的形式置于下游恒温器22中的下游测试用毛细管20；所述下游恒温器22包括设置于下游测试用毛细管20入口处的下游测温温度计18，放置在下游恒温器22内的下游加热丝23，与下游加热丝23连接的下游直流加热电源21，与下游测试用毛细管20和下游直流加热电源21连接的下游PID恒温控制器24，还包括伸入下游恒温器22内的搅拌器25；所述下游测试用毛细管20管路两端分别设置下游第一压力传感器27和下游第二压力传感器28，所述下游第一压力传感器27和下游第二压力传感器28间设置下游差压传感器26；还包括与所述上游测温温度计6、下游测温温度计18、上游PID恒温控制器11、下游PID恒温控制器24、上游差压传感器13、上游第一压力传感器14、上游第二压力传感器15、下游差压传感器26、下游第一压力传感器27和下游第二压力传感器28连接的采集系统16。上游PID恒温控制器11和下游PID恒温控制器24实现恒温控制，温度波动性不超过0.1℃/h。精密背压阀30实现粘度计工作压力的精细调控。As shown in the accompanying drawings, the utility model is a double capillary viscometer for high temperature and high pressure, including a constant flow pump 2 connected to the reagent bottle 1, and a measuring pipeline connected to the constant flow pump 2, between the constant flow pump 2 and the constant flow pump. A regulating valve 3 and a filter 4 are arranged on the pipeline connected by the measuring pipeline, and the measuring pipeline comprises an upstream measuring pipeline and a downstream measuring pipeline, and the downstream measuring pipeline is connected to the liquid collection bottle 31 through the condenser 29, and the condenser 29 A precision back pressure valve 30 is provided on the pipeline connected to the liquid collection bottle 31; the upstream measurement pipeline includes an upstream test capillary 7 placed in the upstream thermostat 12 in the form of a coil; the upstream thermostat 12 Including the upstream temperature measuring thermometer 6 arranged at the inlet of the upstream testing capillary 7, the upstream heating wire 10 placed in the upstream thermostat 12, the upstream DC heating power supply 9 connected with the upstream heating wire 10, and the upstream testing capillary 7 and The upstream PID constant temperature controller 11 connected to the upstream DC heating power supply 9; the upstream first pressure sensor 14 and the upstream second pressure sensor 15 are respectively arranged at the two ends of the capillary tube 7 for the upstream test, and the upstream first pressure sensor 14 and An upstream differential pressure sensor 13 is arranged between the upstream second pressure sensor 15; the downstream measuring pipeline includes a downstream test capillary 20 placed in a downstream thermostat 22 in the form of a coil; the downstream thermostat 22 includes a capillary tube arranged downstream The downstream temperature measuring thermometer 18 at the entrance of the capillary 20 for testing, the downstream heating wire 23 placed in the downstream thermostat 22, the downstream DC heating power supply 21 connected with the downstream heating wire 23, and the downstream testing capillary 20 and the downstream DC heating power supply The downstream PID constant temperature controller 24 connected by 21 also includes the agitator 25 stretching into the downstream thermostat 22; the downstream first pressure sensor 27 and the downstream second pressure sensor 28 are respectively set at the two ends of the capillary 20 pipeline for the downstream test , the downstream differential pressure sensor 26 is arranged between the first downstream pressure sensor 27 and the second downstream pressure sensor 28; it also includes the upstream temperature measuring thermometer 6, the downstream temperature measuring thermometer 18, the upstream PID constant temperature controller 11, the downstream PID The acquisition system 16 is connected to the thermostat controller 24 , the upstream differential pressure sensor 13 , the upstream first pressure sensor 14 , the upstream second pressure sensor 15 , the downstream differential pressure sensor 26 , the downstream first pressure sensor 27 and the downstream second pressure sensor 28 . The upstream PID constant temperature controller 11 and the downstream PID constant temperature controller 24 realize constant temperature control, and the temperature fluctuation does not exceed 0.1° C./h. The precision back pressure valve 30 realizes fine regulation of the working pressure of the viscometer.
所述上游测试用毛细管7和下游测试用毛细管20的尺寸相同。The size of the upstream testing capillary 7 and the downstream testing capillary 20 are the same.
所述恒流泵2能够提供0.01-9.99ml/min液态体积流量的稳定输出。The constant flow pump 2 can provide a stable output of 0.01-9.99ml/min liquid volume flow.
作为本实用新型的优选实施方式，所述上游测试用毛细管7之间及其与前后流通管路、压力测量管路之间采用孔径0.25mm的316不锈钢上游三通接头8连接，所述下游测试用毛细管20之间及其与前后流通管路、压力测量管路之间采用孔径0.25mm的316不锈钢下游三通接头19连接。因此消除了流体在管路接头处流态的变化，保证流动的稳定。As a preferred embodiment of the present utility model, the upstream testing capillaries 7 are connected with the front and rear circulation pipelines and the pressure measurement pipelines using a 316 stainless steel upstream tee joint 8 with an aperture of 0.25 mm. 316 stainless steel downstream tee joints 19 with an aperture of 0.25mm are used to connect between the capillary tubes 20 and the front and rear circulation pipelines and pressure measurement pipelines. Therefore, the change of the flow state of the fluid at the pipe joint is eliminated, and the stability of the flow is ensured.
作为本实用新型的优选实施方式，所述上游测试用毛细管7和下游测试用毛细管20以螺旋方式缠绕在直径为150mm的不锈钢金属圆柱上水平放置，进出口留有100mm的直管段。这样可以节省恒温器空间，使双毛细管粘度计布局紧凑；同时向心力在小管径、大曲率半径的螺旋管中的作用可以忽略。As a preferred embodiment of the present invention, the upstream test capillary 7 and the downstream test capillary 20 are spirally wound on a stainless steel metal cylinder with a diameter of 150mm and placed horizontally, leaving a 100mm straight pipe section at the inlet and outlet. In this way, the space of the thermostat can be saved, and the layout of the double capillary viscometer can be compact; at the same time, the effect of centripetal force in the helical tube with small diameter and large curvature radius can be ignored.
作为本实用新型的优选实施方式，所述上游测试用毛细管7的进口前布置一段长度为300mm，材质和管径与上游测试用毛细管7相同的上游预热毛细管5，所述下游测试用毛细管20的进口前布置一段长度为300mm，材质和管径与下游测试用毛细管20相同的下游预热毛细管17。目的之一是通过加热管路将管中流体加热到指定温度，保证测试用毛细管中压降测量是在恒温条件下进行；目的之二是增加测试用毛细管上游的节流阻力，保证流体流动的稳定性。As a preferred embodiment of the present utility model, the upstream preheating capillary 5 with the same material and diameter as the upstream testing capillary 7 is arranged with a length of 300mm before the entrance of the upstream testing capillary 7, and the downstream testing capillary 20 A section of downstream preheating capillary 17 with a length of 300mm and the same material and diameter as the downstream testing capillary 20 is arranged before the inlet. One of the purposes is to heat the fluid in the tube to the specified temperature through the heating pipeline, so as to ensure that the pressure drop measurement in the test capillary is carried out under constant temperature conditions; the second purpose is to increase the throttling resistance upstream of the test capillary to ensure the flow stability.
作为本实用新型的优选实施方式，所述下游恒温器22采用水浴加热法，恒定温度设置在25℃；所述下游恒温器22的加热分为两个步骤：25-240℃采用油浴加热法，高于240℃采用熔盐浴加热法。As a preferred embodiment of the present utility model, the downstream thermostat 22 adopts a water bath heating method, and the constant temperature is set at 25°C; the heating of the downstream thermostat 22 is divided into two steps: 25-240°C adopts an oil bath heating method , higher than 240 ℃ using molten salt bath heating method.
作为本实用新型的优选实施方式，所述上游测试用毛细管7和下游测试用毛细管20由316不锈钢材质加工成型，管长为3100mm，截面为圆形，名义内径250μm，管径均匀。标准流体和被测流体在管径均匀且长径比大的毛细管中流动，因此消除了流体的动能修正和进出口末端修正。As a preferred embodiment of the present invention, the upstream test capillary 7 and the downstream test capillary 20 are made of 316 stainless steel, with a tube length of 3100 mm, a circular cross section, a nominal inner diameter of 250 μm, and a uniform tube diameter. The standard fluid and the measured fluid flow in the capillary with uniform diameter and large length-to-diameter ratio, thus eliminating the kinetic energy correction of the fluid and the correction of the inlet and outlet ends.
作为本实用新型的优选实施方式，所述上游差压传感器13、上游第一压力传感器14、上游第二压力传感器15、下游差压传感器26、下游第一压力传感器27和下游第二压力传感器28采用Rosemount3051系列，信号辨识度高，稳定性强。As a preferred embodiment of the present utility model, the upstream differential pressure sensor 13, the upstream first pressure sensor 14, the upstream second pressure sensor 15, the downstream differential pressure sensor 26, the downstream first pressure sensor 27 and the downstream second pressure sensor 28 Adopt Rosemount3051 series, high signal recognition and strong stability.
作为本实用新型的优选实施方式，冷凝器29是一套管式换热器，满足换热要求。As a preferred embodiment of the present utility model, the condenser 29 is a tube-and-tube heat exchanger, which meets heat exchange requirements.
本实用新型的工作原理：Working principle of the utility model:
流体由试剂瓶1中经恒流泵2加压以恒定体积流量流出；经调节阀3和过滤器4后依次流入上、下游测量管路；上游测量管路中上游测试用毛细管7以盘管的形式置于温度为T的上游恒温器12中；下游测量管路中下游测试用毛细管20以盘管的形式置于温度为T0的下游恒温器22中；流体流经上游测试用毛细管7的温度由上游测温温度计6测量，进出口两端测试压力分别由上游第一压力传感器14和上游第二压力传感器15测量，进出口两端测试压差由上游差压传感器13测量；流体流经下游测试用毛细管20的温度由下游测温温度计18测量，进出口两端测试压力分别由下游第一压力传感器27和下游第二压力传感器28测量，进出口两端测试压差由下游差压传感器26测量；上游测温温度计6、下游测温温度计18、上游PID恒温控制器11、下游PID恒温控制器24、上游差压传感器13、上游第一压力传感器14、上游第二压力传感器15、下游差压传感器26、下游第一压力传感器27和下游第二压力传感器28的信号均进入采集系统16；流体从下游测量管路流出后，依次流经冷凝器29和精密背压阀30，最后流入收液瓶31；精密背压阀30实现粘度计工作压力的精细调控；分析天平32实时称重监测校核测试所用流体的体积流量。The fluid is pressurized by the constant flow pump 2 from the reagent bottle 1 to flow out at a constant volume flow rate; after passing through the regulating valve 3 and the filter 4, it flows into the upstream and downstream measurement pipelines in sequence; The form is placed in the upstream thermostat 12 whose temperature is T; the downstream test capillary 20 in the downstream measurement pipeline is placed in the downstream thermostat 22 whose temperature is T 0 in the form of a coil; the fluid flows through the upstream test capillary 7 The temperature is measured by the upstream temperature measuring thermometer 6, the test pressure at both ends of the inlet and outlet is measured by the first upstream pressure sensor 14 and the second upstream pressure sensor 15 respectively, and the test pressure difference at both ends of the inlet and outlet is measured by the upstream differential pressure sensor 13; the fluid flow The temperature of the downstream testing capillary 20 is measured by the downstream temperature measuring thermometer 18, the test pressure at both ends of the inlet and outlet is measured by the first downstream pressure sensor 27 and the second downstream pressure sensor 28 respectively, and the test pressure difference at both ends of the inlet and outlet is determined by the downstream differential pressure Sensor 26 measurement; upstream temperature measuring thermometer 6, downstream temperature measuring thermometer 18, upstream PID constant temperature controller 11, downstream PID constant temperature controller 24, upstream differential pressure sensor 13, upstream first pressure sensor 14, upstream second pressure sensor 15, The signals of the downstream differential pressure sensor 26, the downstream first pressure sensor 27 and the downstream second pressure sensor 28 all enter the acquisition system 16; after the fluid flows out from the downstream measurement pipeline, it flows through the condenser 29 and the precision back pressure valve 30 in sequence, and finally The liquid flows into the liquid collection bottle 31; the precision back pressure valve 30 realizes fine regulation of the working pressure of the viscometer; the analytical balance 32 weighs in real time to monitor and check the volume flow rate of the fluid used in the test.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502231A (en) * | 2014-12-19 | 2015-04-08 | 西安交通大学 | Double capillary viscometer for high temperature and high pressure and test method thereof |
| CN108613899A (en) * | 2018-06-15 | 2018-10-02 | 昆明理工大学 | A kind of adaptive oil viscosity measuring device of strain-type and method |
| CN111948091A (en) * | 2020-09-09 | 2020-11-17 | 中国科学技术大学 | Gas concentration measuring device and method |
| WO2022051947A1 (en) * | 2020-09-09 | 2022-03-17 | 中国科学技术大学 | Gas concentration measurement device and method |
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2014
- 2014-12-19 CN CN201420820887.4U patent/CN204330535U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502231A (en) * | 2014-12-19 | 2015-04-08 | 西安交通大学 | Double capillary viscometer for high temperature and high pressure and test method thereof |
| CN104502231B (en) * | 2014-12-19 | 2017-04-19 | 西安交通大学 | Double capillary viscometer for high temperature and high pressure and test method thereof |
| CN108613899A (en) * | 2018-06-15 | 2018-10-02 | 昆明理工大学 | A kind of adaptive oil viscosity measuring device of strain-type and method |
| CN108613899B (en) * | 2018-06-15 | 2023-12-22 | 昆明理工大学 | Strain type self-adaptive oil viscosity measurement device and method |
| CN111948091A (en) * | 2020-09-09 | 2020-11-17 | 中国科学技术大学 | Gas concentration measuring device and method |
| WO2022051947A1 (en) * | 2020-09-09 | 2022-03-17 | 中国科学技术大学 | Gas concentration measurement device and method |
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