CN206248500U - A kind of Ubbelohde straight tube viscosimeter for measuring liquid motion viscosity - Google Patents

Abstract

The utility model is related to a kind of Ubbelohde straight tube viscosimeter for measuring liquid motion viscosity, comprising：Measurement pipe, is vertically arranged；Balance pipe, is vertically arranged, and its bottom is connected by lower outlet pipe with the bottom of measurement pipe；Wherein, described measurement pipe includes the top straight tube and bottom capillary being sequentially connected；The first measurement ball bubble, the first measurement sensor, the second measurement ball bubble, the second measurement sensor, the 3rd measurement ball bubble and the 3rd measurement sensor are from top to bottom disposed with described top straight tube.The utility model can realize automatic measurement, effectively improve measurement range, certainty of measurement and measurement efficiency.

Description

A Ubbelohde Straight Tube Viscometer for Measuring Liquid Kinematic Viscosity

technical field

The utility model relates to an Ubbelohde straight tube viscometer, in particular to an improved Ubbelohde straight tube viscometer for measuring liquid kinematic viscosity, and belongs to the technical field of measuring devices.

Background technique

Most of the viscometers currently used are made of U-shaped or W-shaped structures. However, the viscometer with this structure generally has the following disadvantages in the process of measuring liquid kinematic viscosity: inconvenient cleaning, low degree of automation, and small measurement range.

Therefore, in order to solve the shortcomings and limitations existing in the prior art, improve the measurement range, realize automatic measurement, etc., it is necessary to propose a new type of liquid kinematic viscometer.

Utility model content

The purpose of the utility model is to provide an Ubbelohde straight tube viscometer for measuring liquid kinematic viscosity, realize automatic measurement, and effectively improve measurement range, measurement accuracy and measurement efficiency.

In order to achieve the above object, the utility model is achieved through the following technical solutions: an Ubbelohde straight tube viscometer for measuring liquid kinematic viscosity, comprising: a measuring tube, vertically arranged; a balance tube, vertically arranged, the bottom end of which passes through The lower outlet tube communicates with the bottom end of the measuring tube; wherein, the measuring tube includes an upper straight tube and a lower capillary tube connected in sequence; the upper straight tube is sequentially provided with a first measuring bulb, a second A measuring sensor, a second measuring bulb, a second measuring sensor, a third measuring bulb and a third measuring sensor.

The upper straight pipe, the first measuring bulb, the second measuring bulb, the third measuring bulb, the lower capillary tube and the lower outlet tube are arranged coaxially.

The first measuring bulb and the second measuring bulb have the same volume and are 12 times larger than the volume of the third measuring bulb.

The first measuring sensor, the second measuring sensor and the third measuring sensor are respectively embedded in the pipe wall of the upper straight pipe and sealed with glue.

The Ubbelohde straight tube viscometer described in the utility model also includes an analyzer, which is respectively connected with the first measuring sensor, the second measuring sensor and the third measuring sensor through circuits, records the time when the liquid flows through each measuring sensor, and calculates The kinematic viscosity of a liquid.

The top of the measuring tube is flush with the top of the balance tube.

The top of the measuring tube is provided with a first sealing thread to hermetically seal the measuring tube.

The top of the balance tube is provided with a second sealing thread to airtight the balance tube.

In summary, compared with the prior art, the Ubbelohde Straight Tube Viscometer for measuring liquid kinematic viscosity provided by the utility model has the following beneficial effects:

1. Since the volumes of the first and second measuring bulbs are much larger than the third measuring bulb, the measuring range can reach 100 times or even higher, which can greatly reduce the workload of laboratory measuring personnel and reduce laboratory costs.

2. Since the measuring tube is a straight tube structure, it is more convenient to realize automatic sampling, automatic cleaning, automatic drying and other operations, so as to realize fully automatic measurement.

3. The sealing thread is used to make the airtightness of the viscometer more stable and reliable.

Description of drawings

Fig. 1 is the structure diagram of the Ubbelohde straight tube viscometer for measuring liquid kinematic viscosity in the utility model.

detailed description

Below in conjunction with Fig. 1, the utility model will be further elaborated by describing a preferred specific embodiment in detail.

As shown in Figure 1, the Ubbelohde straight tube viscometer for measuring liquid kinematic viscosity provided by the utility model includes: a measuring tube, vertically arranged; a balance tube 2, vertically arranged, and its bottom end passes through the The tube 3 communicates with the bottom end of the measuring tube; wherein, the measuring tube includes an upper straight tube 11 and a lower capillary tube 12 connected in sequence; the upper straight tube 11 is sequentially provided with first measuring bulbs from top to bottom 13. A first measurement sensor 14 , a second measurement bulb 15 , a second measurement sensor 16 , a third measurement bulb 17 and a third measurement sensor 18 .

The upper straight tube 11 , the first measuring bulb 13 , the second measuring bulb 15 , the third measuring bulb 17 , the lower capillary tube 12 and the lower outlet tube 3 are coaxially arranged.

The first measuring bulb 13 and the second measuring bulb 15 have the same volume, and are much larger than the third measuring bulb 17 . Generally, the volumes of the first measuring bulb 13 and the second measuring bulb 15 are 12 times larger than the volume of the third measuring bulb 17 .

The first measuring sensor 14, the second measuring sensor 16 and the third measuring sensor 18 are respectively embedded in the pipe wall of the upper straight pipe 11, and sealed with glue, so as to measure the first measurement of liquid kinematic viscosity respectively. point, the second measurement point and the third measurement point. In this embodiment, the glue is epoxy resin glue with a special ratio.

The Ubbelohde straight tube viscometer described in the utility model also includes an analyzer, which is respectively connected with the first measuring sensor 14, the second measuring sensor 16 and the third measuring sensor 18 through a circuit, and records the time when the liquid flows through each measuring sensor, And calculate the kinematic viscosity of the liquid.

The top of the measuring tube is flush with the top of the balance tube 2 .

The top of the measuring tube is provided with a first sealing thread 19 to hermetically seal the measuring tube.

The top of the balance tube 2 is provided with a second sealing thread 21 to airtight the balance tube 2 .

When using the Ubbelohde straight tube viscometer provided by the utility model to measure the kinematic viscosity of the sample liquid, it specifically includes the following steps: first, put the Ubbelohde straight tube viscometer vertically into the constant temperature bath, so that the measuring tube and the balance tube are 2 The top, and the lower outlet tube 3 are exposed. When sucking the sample, the lower outlet tube 3 is inserted into the test tube, the second sealing thread 21 is tightened to airtightly seal the balance tube 2, the measuring tube is connected to the suction device through the first sealing thread 19, and the liquid in the test tube is sucked into the test tube by negative pressure for measurement tube. When dropping samples, the first sealing thread 19 and the second sealing thread 21 are removed, so that both the measuring tube and the balance tube 2 are communicated with the atmosphere, so that the liquid in the measuring tube flows down naturally under the action of gravity.

For liquids with a small range, the third measurement bulb 17 is used for measurement, and the analyzer records the time points when the liquid flows through the second measurement sensor 16 and the third measurement sensor 18 respectively, and calculates the kinematic viscosity of the liquid. For large-scale liquids, the second measurement bulb 15 and the third measurement bulb 17 are used for measurement, and the time points at which the liquid flows through the first measurement sensor 14 and the third measurement sensor 18 are recorded by the analyzer, and the movement of the liquid is calculated viscosity. Wherein, the first measuring bulb 13 has a buffer function, which can prevent the liquid from being drawn out of the measuring tube and entering the gas pipeline during measurement.

The entire measurement process realizes fully automatic measurement, without the need for the measurement personnel to manually record the time when the liquid flows through the measurement point with the naked eye, improving efficiency and accuracy.

The Ubbelohde Straight Tube Viscometer provided by the utility model, when cleaning, only needs to send the cleaning liquid from the upper part of the measuring tube and the balance tube 2, and flow out from the lower outlet tube 3, and the cleaning can be completed conveniently and quickly , and guarantee the cleaning quality. Similarly, when drying, it is only necessary to send dry compressed air into the measuring tube and the balance tube 2, which is convenient and quick.

In summary, compared with the prior art, the Ubbelohde Straight Tube Viscometer for measuring liquid kinematic viscosity provided by the utility model has the following beneficial effects:

1. Since the volumes of the first and second measuring bulbs are much larger than the third measuring bulb, the measuring range can reach 100 times or even higher, which can greatly reduce the workload of laboratory measuring personnel and reduce laboratory costs.

2. Since the measuring tube is a straight tube structure, it is more convenient to realize automatic sampling, automatic cleaning, automatic drying and other operations, so as to realize fully automatic measurement.

3. The sealing thread is used to make the airtightness of the viscometer more stable and reliable.

4. Use sensors and analyzers to automatically record the time when the liquid flows through the measurement point, and calculate the kinematic viscosity of the liquid, without the need for manual recording by the naked eye, improving measurement efficiency and accuracy.

Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions of the present utility model will be obvious to those skilled in the art after reading the above content. Therefore, the protection scope of the present utility model should be defined by the appended claims.

Claims (8)

1. an Ubbelohde straight tube viscometer for measuring liquid kinematic viscosity, is characterized in that, comprises: Measuring tube, set vertically; The balance pipe is arranged vertically, and its bottom end communicates with the bottom end of the measuring pipe through the lower outlet pipe; The measuring tube comprises an upper straight tube and a lower capillary connected in sequence; The upper straight pipe is sequentially provided with a first measuring bulb, a first measuring sensor, a second measuring bulb, a second measuring sensor, a third measuring bulb and a third measuring sensor from top to bottom. 2. the Ubbelohde straight tube viscometer for measuring liquid kinematic viscosity as claimed in claim 1, is characterized in that, described upper straight tube, the first measuring bulb, the second measuring bulb, the 3rd measuring bulb The bubble, the lower capillary and the lower outlet tube are arranged coaxially. 3. the Ubbelohde straight tube viscometer for measuring liquid kinematic viscosity as claimed in claim 2, is characterized in that, the volume of described first measurement bulb and the second measurement bulb are identical, and greater than the third measurement The volume of the bulb is 12 times. 4. the Ubbelohde straight tube viscometer for measuring liquid kinematic viscosity as claimed in claim 3, is characterized in that, described first measuring sensor, the second measuring sensor and the 3rd measuring sensor are respectively embedded in the upper part inside the wall of the straight pipe and sealed with glue. 5. the Ubbelohde straight tube viscometer for measuring liquid kinematic viscosity as claimed in claim 4, is characterized in that, also comprises analyzer, respectively with the first measuring sensor, the second measuring sensor and the 3rd measuring sensor by circuit Connect, record the time when the liquid flows through each measuring sensor, and calculate the kinematic viscosity of the liquid. 6. The Ubbelohde straight tube viscometer for measuring liquid kinematic viscosity as claimed in claim 1, wherein the top of the measuring tube is flush with the top of the balance tube. 7. The Ubbelohde straight tube viscometer for measuring liquid kinematic viscosity as claimed in claim 1, characterized in that, the top of the measuring tube is provided with a first sealing thread to airtight the measuring tube. 8. The Ubbelohde straight tube viscometer for measuring liquid kinematic viscosity as claimed in claim 1, characterized in that, the top of the balance tube is provided with a second sealing thread to airtight the balance tube.