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CN-122016560-A - Viscosity testing device and method

CN122016560ACN 122016560 ACN122016560 ACN 122016560ACN-122016560-A

Abstract

The present disclosure provides a viscosity testing apparatus and method. The testing device comprises a branch pipeline system, a testing unit, a pumping unit and a control unit, wherein the branch pipeline system comprises a first branch pipeline, a second branch pipeline and a third branch pipeline which are sequentially communicated, the testing unit comprises a testing ball and a limiting piece, the third branch pipeline comprises a transparent testing tube, the pumping unit is arranged on the second branch pipeline and is used for pumping liquid to be tested in the liquid to be tested conveying pipeline to the branch pipeline system and enabling the testing ball to move at a constant speed within a preset distance, and the control unit is used for determining the viscosity of the liquid to be tested according to the movement speed of the testing ball at the constant speed within the preset distance. The testing device provided by the disclosure can realize automatic testing of the viscosity of the liquid to be tested, reduce errors of manual operation, improve testing efficiency and accuracy, and is suitable for online real-time monitoring.

Inventors

  • PAN YUE
  • SUN XUE
  • JIN WEIWEI

Assignees

  • 中复神鹰碳纤维股份有限公司

Dates

Publication Date
20260512
Application Date
20260311

Claims (10)

  1. 1. A viscosity testing device, the testing device comprising: The system comprises a branch pipeline system, a first pipeline system and a second pipeline system, wherein the branch pipeline system comprises a first branch pipeline, a second branch pipeline and a third branch pipeline which are sequentially communicated, the first branch pipeline and the third branch pipeline are respectively communicated with a liquid conveying pipeline to be detected, and the first branch pipeline and the third branch pipeline are respectively vertical to the liquid conveying pipeline to be detected; The test unit comprises a test ball and a limiting piece, wherein the third branch pipeline comprises a transparent test tube, the test ball is arranged in the transparent test tube, the limiting piece is arranged at two ends in the transparent test tube and used for limiting the test ball to be separated from the transparent test tube, the transparent test tube is provided with a 0 scale and an end point scale, and the distance between the 0 scale and the end point scale is a preset distance; the pumping unit is arranged on the second branch pipeline and is used for pumping the liquid to be tested in the liquid to be tested conveying pipeline to the branch pipeline system and enabling the test ball to move at a constant speed within the preset distance; And the control unit is used for determining the viscosity of the liquid to be tested according to the motion speed of the test ball in the preset distance in a uniform motion mode.
  2. 2. The viscosity testing device according to claim 1, further comprising a timing and position sensing unit including at least 2 sets of non-contact sensors disposed outside the transparent test tube and corresponding to the 0 scale and the end scale, wherein the timing and position sensing unit is configured to detect a time taken for the test ball to pass the preset distance and determine a movement speed of the test ball at a constant speed within the preset distance.
  3. 3. The viscosity test apparatus according to claim 2, wherein the control unit includes a controller connected to the pumping unit and the timing and position sensing unit, the controller determining a driving frequency coefficient of the metering pump in the pumping unit according to the movement speed, and determining the viscosity of the liquid to be tested according to the driving frequency coefficient.
  4. 4. The viscosity test apparatus according to claim 1, further comprising a temperature control unit disposed between the pumping unit and the test unit, the temperature control unit being configured to control a temperature of the liquid under test flowing through the test unit.
  5. 5. The viscosity testing device of claim 1, wherein the limiting member comprises a hollowed-out support, and wherein the hollowed-out support has a pore diameter smaller than the diameter of the test ball.
  6. 6. A viscosity testing method, wherein the testing method is applied to the viscosity testing device according to any one of claims 1 to 5, and the testing method comprises: the pumping unit is controlled to pump the liquid to be tested in the liquid to be tested conveying pipeline to the branch pipeline system, and the test ball moves at a constant speed within a preset distance of the transparent test tube; And the control unit determines the viscosity of the liquid to be detected according to the motion speed of the test ball in the preset distance.
  7. 7. The method according to claim 6, wherein the control unit determines the viscosity of the liquid to be measured according to a movement speed of the test ball moving at a constant speed within the preset distance, comprising: Determining a driving frequency coefficient of a metering pump in the pumping unit through the movement speed; and determining the viscosity of the liquid to be detected according to the mapping relation between the viscosity and the driving frequency coefficient.
  8. 8. The viscosity test method of claim 7, further comprising: Acquiring the sample speed of the test ball moving at a uniform speed within the preset distance; determining a corresponding sample driving frequency coefficient according to the sample speed; and establishing a mapping relation between the viscosity and the driving frequency coefficient according to the sample speed and the sample driving frequency coefficient.
  9. 9. The viscosity test method of claim 7, further comprising: And verifying the accuracy of the determined viscosity of the liquid to be tested according to the movement speed of the test ball and a standard curve.
  10. 10. The viscosity test method of claim 9, further comprising: by the falling ball method, a plurality of standard liquids with known viscosities are used, the movement speed of the test ball is calculated based on the time required for the test ball to pass through the preset distance, and a standard curve of the viscosities and the movement speed is established.

Description

Viscosity testing device and method Technical Field The disclosure relates to the technical field of viscosity testing, and in particular relates to a viscosity testing device and method. Background In the production process of the polyacrylonitrile fiber, the viscosity of the stock solution is a core parameter for controlling the polymerization degree and the spinning quality, and the accurate real-time viscosity detection has important significance for guaranteeing the product quality and optimizing the production process. Disclosure of Invention In order to solve the problems in the related art, the present disclosure provides a viscosity testing apparatus and method. According to a first aspect of embodiments of the present disclosure, there is provided a viscosity testing apparatus, the testing apparatus comprising: The system comprises a branch pipeline system, a first pipeline system and a second pipeline system, wherein the branch pipeline system comprises a first branch pipeline, a second branch pipeline and a third branch pipeline which are sequentially communicated, the first branch pipeline and the third branch pipeline are respectively communicated with a liquid conveying pipeline to be detected, and the first branch pipeline and the third branch pipeline are respectively vertical to the liquid conveying pipeline to be detected; The test unit comprises a test ball and a limiting piece, wherein the third branch pipeline comprises a transparent test tube, the test ball is arranged in the transparent test tube, the limiting piece is arranged at two ends in the transparent test tube and used for limiting the test ball to be separated from the transparent test tube, the transparent test tube is provided with a 0 scale and an end point scale, and the distance between the 0 scale and the end point scale is a preset distance; the pumping unit is arranged on the second branch pipeline and is used for pumping the liquid to be tested in the liquid to be tested conveying pipeline to the branch pipeline system and enabling the test ball to move at a constant speed within the preset distance; And the control unit is used for determining the viscosity of the liquid to be tested according to the motion speed of the test ball in the preset distance in a uniform motion mode. In some embodiments of the disclosure, the test device further comprises a timing and position sensing unit, the timing and position sensing unit comprises at least 2 groups of non-contact sensors, the non-contact sensors are arranged on the outer side of the transparent test tube and correspond to the 0 scale and the end point scale, and the timing and position sensing unit is used for detecting time for the test ball to pass through the preset distance and determining the movement speed of the test ball in the preset distance at a uniform speed. In some embodiments of the disclosure, the control unit comprises a controller, wherein the controller is connected with the pumping unit and the timing and position sensing unit, and is used for determining a driving frequency coefficient of a metering pump in the pumping unit according to the movement speed and determining the viscosity of the liquid to be measured according to the driving frequency coefficient. In some embodiments of the disclosure, the test device further comprises a temperature control unit disposed between the pumping unit and the test unit, the temperature control unit being configured to control the temperature of the liquid under test flowing through the test unit. In some embodiments of the present disclosure, the limiting member includes a hollowed-out support, and the aperture of the hollowed-out support is smaller than the diameter of the test ball. According to a second aspect of embodiments of the present disclosure, there is provided a viscosity test method applied to a viscosity test apparatus as described above, the test method including: the pumping unit is controlled to pump the liquid to be tested in the liquid to be tested conveying pipeline to the branch pipeline system, and the test ball moves at a constant speed within a preset distance of the transparent test tube; And the control unit determines the viscosity of the liquid to be detected according to the motion speed of the test ball in the preset distance. In some embodiments of the present disclosure, the control unit determines the viscosity of the liquid to be measured according to a movement speed of the test ball moving at a uniform speed within the preset distance, including: Determining a driving frequency coefficient of a metering pump in the pumping unit through the movement speed; and determining the viscosity of the liquid to be detected according to the mapping relation between the viscosity and the driving frequency coefficient. In some embodiments of the present disclosure, the test method further comprises: Acquiring the sample speed of the test ball moving at a uniform speed within the pr