Liquid viscosity tester

Abstract

The utility model discloses a liquid viscosity tester which comprises a rotary driving unit and a central shaft group unit, and the rotary driving unit drives the central shaft unit to rotate; the rotation driving unit comprises a rotating disc, the rotating disc is driven by a driving assembly to rotate, and the edge of the rotating disc extends outwards to form a positioning piece. The central shaft unit comprises a central shaft, and a viscosity detection probe is mounted at the lower end of the central shaft; an elastic hairspring is arranged between the central shaft and the turntable, so that the turntable rotates to drive the central shaft to rotate through the elastic hairspring, and a paddle is fixed on the central shaft; the rotary driving unit further comprises an upper U-shaped seat, the lower end of the center shaft is sharp, and the lower end of the center shaft abuts against the interior of a conical pit in the lower side of the upper U-shaped seat. According to the utility model, coaxial rotation of the central shaft and the rotary sleeve can be ensured, friction force of rotation of the central shaft is reduced, and a viscosity measurement value is more accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a liquid viscosity tester belongs to liquid viscosity test technical field. BACKGROUND

[0002] Rotary viscometer is used for measuring the viscous resistance of liquid and liquid dynamic viscosity, is widely used in determination oil, paint, plastic, food, medicine, cosmetics, glue stick product etc.

[0003] The rotary viscometer in prior art contains a rotary drive unit and a central rotating shaft unit, the lower end of the central rotating shaft unit is inserted into the liquid to be measured through a test accessory, when the test accessory rotates in the liquid to be measured, the liquid to be measured produces certain resistance to the test accessory and the central rotating shaft unit according to the different viscosity of the liquid to be measured, so that the rotary drive unit and the central rotating shaft unit produce certain angle difference, however, the friction between the central rotating shaft unit and the central rotating shaft unit makes the measured viscosity value greater than the actual value, so that the measurement data is inaccurate.

[0004] Therefore, it is necessary to improve the prior art. UTILITY MODEL CONTENTS

[0005] The utility model provides a liquid viscosity tester according to the deficiency in the background art, can guarantee that the central shaft and the rotating sleeve are coaxially rotated, reduce the friction of the central shaft rotation, so that the viscosity measurement value is more accurate.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] A liquid viscosity tester, comprising a rotary drive unit and a central shaft group unit, the rotary drive unit drives the central shaft unit to rotate;

[0008] The rotary drive unit includes a turntable, the turntable is driven to rotate through a drive assembly, and the edge of the turntable extends outward to form a positioning sheet;

[0009] The central shaft unit includes a central shaft, and a viscosity detection probe is installed at the lower end of the central shaft;Elastic hairs are arranged between the central shaft and the turntable, so that the rotation of the turntable drives the central shaft to rotate through the elastic hairs, and paddles are fixed on the central shaft;

[0010] It also includes a first photoelectric sensor for detecting the positioning sheet and a second photoelectric sensor for detecting the paddle;

[0011] The rotary drive unit further includes an upper U-shaped seat, the lower end of the central shaft is sharp, and the lower end of the central shaft is located in the conical pit on the lower side of the upper U-shaped seat.

[0012] Further, the rotating driving unit further comprises a lower rotating sleeve, a lower end of the lower rotating sleeve is fixedly connected with an upper end of the upper U-shaped seat, and a connecting arm is fixedly connected with an upper end of the lower rotating sleeve.

[0013] Further, a lower end of the central shaft is fixedly installed with a lower U-shaped seat, and the lower U-shaped seat is connected with the viscosity detection probe.

[0014] Further, the driving assembly comprises a driving motor, the driving motor drives the upper rotating sleeve to rotate through a shaft coupling, and a lower end of the upper rotating sleeve is fixedly connected with the rotating disc.

[0015] Further, a blocking screw is vertically fixed at a lower end of the rotating disc, and the blocking screw blocks the paddle when the rotating disc drives the central shaft to rotate.

[0016] Further, the central shaft is coaxially matched with the upper rotating sleeve and the lower rotating sleeve, an upper end of the central shaft is a small-diameter thin shaft section, and the thin shaft section is gap matched with an inner wall of the upper rotating sleeve.

[0017] Further, the upper rotating sleeve is rotatably installed in the upper bearing seat, and the lower rotating sleeve is rotatably installed in the lower bearing seat.

[0018] Further, the central shaft is gap matched with the inner walls of the upper rotating sleeve and the lower rotating sleeve.

[0019] Compared with the prior art, the above technical scheme has the following advantages.

[0020] The lower end of the central shaft is sharp, the lower end of the central shaft is arranged in the conical pit on the lower side of the upper U-shaped seat, the friction of the central shaft is reduced, and the viscosity measurement value is more accurate; the thin shaft section at the upper end of the central shaft is gap matched with the inner wall of the upper rotating sleeve, the coaxial rotation of the central shaft and the rotating sleeve is ensured, and the friction of the central shaft is further reduced.

[0021] The utility model will be explained in detail in combination with the drawings and examples. DRAWINGS

[0022] Figure 1 is the three-dimensional view of the utility model;

[0023] Figure 2 is the structural schematic view of the utility model;

[0024] Figure 3 is Figure 2 the enlarged view of A in the figure;

[0025] Figure 4 is Figure 2 the sectional view of the utility model;

[0026] Figure 5 is Figure 4 is an enlarged view of B in FIG.

[0027] In the figure, 1 - support, 2 - touch control screen, 3 - stepper motor, 4 - coupling, 5 - rotating disc, 6 - positioning sheet, 7 - first photoelectric sensor, 8 - elastic hair, 9 - central shaft, 901 - thin shaft section, 10 - paddle, 11 - second photoelectric sensor, 12 - lower U-shaped seat, 13 - upper U-shaped seat, 14 - connecting arm, 15 - upper bearing seat, 16 - lower bearing seat, 17 - viscosity detection probe, 18 - upper rotating sleeve, 19 - lower rotating sleeve, 20 - blocking screw. DETAILED DESCRIPTION

[0028] In order to have a more clear understanding of the technical features, purposes and effects of the utility model, the specific implementation mode of the utility model will be explained by referring to the drawings.

[0029] As Figures 1-5 shown, the utility model provides a kind of liquid viscosity tester, including rotating drive unit and central shaft group unit, and rotating drive unit drives central shaft unit rotation;

[0030] Rotating drive unit includes rotating disc 5, and rotating disc 5 is driven to rotate by drive assembly, and rotating disc 5 edge extends outward to form positioning sheet 6;

[0031] Central shaft unit includes central shaft 9, and viscosity detection probe 17 is installed at the lower end of central shaft 9;Elastic hair 8 is equipped between central shaft 9 and rotating disc 5, so that the rotation of rotating disc 5 drives central shaft 9 to rotate by elastic hair 8, and paddle 10 is fixed on central shaft 9;

[0032] The utility model also includes first photoelectric sensor 7 for detecting positioning sheet 6, and second photoelectric sensor 11 for detecting paddle 10;

[0033] Rotating drive unit also includes upper U-shaped seat 13, and the lower end of central shaft 9 is sharp, and the lower end of central shaft 9 is placed in the conical pit of the lower side of upper U-shaped seat 13.

[0034] The rotating driving unit further comprises a lower rotating sleeve 19, the lower end of the lower rotating sleeve 19 is fixedly connected with the upper end of the upper U-shaped seat 13, the upper end of the lower rotating sleeve 19 is fixedly connected with a connecting arm 14, the connecting arm 14 is fixedly connected with the rotating disc 5 through a screw, the lower end of the central shaft 9 is fixedly installed with a lower U-shaped seat 12, the lower U-shaped seat 12 is connected with a viscosity detection probe 17, the viscosity detection probe 17 extends into the liquid to be detected, the lower U-shaped seat 12 is rotated with the central shaft 9, the upper U-shaped seat 13 is rotated with the lower rotating sleeve 19 and the rotating disc 5, the U-shaped design makes the lower U-shaped seat 12 and the upper U-shaped seat 13 not interfere with each other in the rotating process, the lower U-shaped seat 12 holds the central shaft 9 through the conical pit, the lower end of the central shaft 9 is sharp, the friction is reduced, and the measurement is more accurate.

[0035] The driving assembly comprises a stepping motor 3, the stepping motor 3 drives the upper rotating sleeve 18 to rotate through a shaft coupling 4, the lower end of the upper rotating sleeve 18 is fixedly connected with the rotating disc 5.

[0036] The lower end of the rotating disc 5 is vertically fixedly connected with a blocking screw 20, when the rotating disc 5 drives the central shaft 9 to rotate, the blocking screw 20 blocks the paddle 10, and the paddle 10 is prevented from rotating ahead of the rotating disc 5.

[0037] The central shaft 9 is coaxially connected with the upper rotating sleeve 18 and the lower rotating sleeve 19, the upper end of the central shaft 9 is a thin shaft section 901 with a smaller diameter, and the thin shaft section 901 is gap-connected with the inner wall of the upper rotating sleeve 18.

[0038] The upper rotating sleeve 18 is rotatably installed in the upper bearing seat 15, and the lower rotating sleeve 19 is rotatably installed in the lower bearing seat 16.

[0039] The central shaft 9 is gap-connected with the inner walls of the upper rotating sleeve 18 and the lower rotating sleeve 19.

[0040] The utility model further includes a support 1 for supporting the tester, and the tester further includes a touch control screen 2, and the touch control screen 2 is integrated with a control system.

[0041] The specific working principle of the utility model is as follows:

[0042] The rotating disc 5 is driven by the stepping motor to rotate, the positioning piece 6 of the rotating disc 5 is rotated to the first photoelectric sensor 7, the control system marks the initial position, the rotating disc 5 is rotated to drive the central shaft 9 to rotate through the elastic hairspring 8, the paddle 10 is fixedly connected on the central shaft 9, the paddle 10 is rotated to the second photoelectric sensor 11, the control system calculates the angle between the paddle 10 and the positioning piece 6 according to the number of steps of the stepping motor, and the viscosity value of the liquid is determined according to the angle.

[0043] In the process of rotating driving unit driving central shaft unit, the lower end of the central shaft 9 is sharp, the lower end of the central shaft 9 is supported on the conical pit on the lower side of the upper U-shaped seat 13, the friction of the rotation of the central shaft is reduced, the viscosity measurement value is more accurate, the thin shaft section 901 on the upper end of the central shaft 9 is matched with the inner wall gap of the upper rotating sleeve 18, the coaxial rotation of the central shaft and the rotating sleeve is ensured, and the friction of the rotation of the central shaft is further reduced.

[0044] The above is the example of the best embodiment of the utility model, wherein the part not described in detail is the common knowledge of the ordinary skilled in the art. The protection scope of the utility model is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A liquid viscosity tester characterized by: It comprises a rotating driving unit and a central shaft group unit, the rotating driving unit drives the central shaft group unit to rotate; The rotating driving unit comprises a rotating disc (5), which is driven to rotate by a driving assembly, and the edge of the rotating disc (5) extends outward to form a positioning sheet (6); The central shaft group unit comprises a central shaft (9), the lower end of the central shaft (9) is provided with a viscosity detection probe (17); an elastic hair (8) is arranged between the central shaft (9) and the rotating disc (5), so that the rotation of the rotating disc (5) drives the central shaft (9) to rotate through the elastic hair (8), and a paddle (10) is fixed on the central shaft (9); It also comprises a first photoelectric sensor (7) for detecting the positioning sheet (6) and a second photoelectric sensor (11) for detecting the paddle (10); The rotating driving unit further comprises an upper U-shaped seat (13), the lower end of the central shaft (9) is sharp, and the lower end of the central shaft (9) is arranged in a tapered recess on the lower side of the upper U-shaped seat (13).

2. A liquid viscosity tester as claimed in claim 1, wherein: The rotating driving unit further comprises a lower rotating sleeve (19), the lower end of the lower rotating sleeve (19) is fixedly connected with the upper end of the upper U-shaped seat (13), the upper end of the lower rotating sleeve (19) is fixedly provided with a connecting arm (14), and the connecting arm (14) is fixedly connected with the rotating disc (5) through a screw.

3. A liquid viscosity tester as claimed in claim 2 wherein: The lower end of the central shaft (9) is fixedly provided with a lower U-shaped seat (12), and the lower U-shaped seat (12) is connected with the viscosity detection probe (17).

4. A liquid viscosity tester as claimed in claim 2, wherein: The driving assembly comprises a driving motor (3), the driving motor (3) drives the upper rotating sleeve (18) to rotate through a shaft coupling (4), and the lower end of the upper rotating sleeve (18) is fixedly connected with the rotating disc (5).

5. The liquid viscosity tester of claim 2, wherein: The lower end of the rotating disc (5) is vertically fixedly provided with a blocking screw (20), and when the rotating disc (5) drives the central shaft (9) to rotate, the blocking screw (20) blocks the paddle (10).

6. A liquid viscosity tester as claimed in claim 4, wherein: The central shaft (9) is coaxially connected with the upper rotating sleeve (18) and the lower rotating sleeve (19), the upper end of the central shaft (9) is a thin shaft section (901) with a smaller diameter, and the thin shaft section (901) is gap-connected with the inner wall of the upper rotating sleeve (18).

7. A liquid viscosity tester as claimed in claim 6 wherein: The upper rotating sleeve (18) is rotatably arranged in an upper bearing seat (15), and the lower rotating sleeve (19) is rotatably arranged in a lower bearing seat (16).

8. A liquid viscosity tester as claimed in claim 7, wherein: The central shaft (9) is gap-connected with the inner walls of the upper rotating sleeve (18) and the lower rotating sleeve (19).

Images