A water-based marking production line viscosity automatic detection device

Abstract

The application relates to a water-based marking production line viscosity automatic detection device, and belongs to the technical field of water-based paint viscosity detection. The device comprises a vibrating viscometer. The vibrating element of the vibrating viscometer is inserted into the inside of a flow stabilizing cylinder, and a calibration cylinder is arranged in parallel outside the flow stabilizing cylinder. A paint inlet pipe is connected through the bottom of the flow stabilizing cylinder, a paint outlet pipe is connected through the side wall of the flow stabilizing cylinder, and the vibrating element is lower than the through hole of the paint outlet pipe and the flow stabilizing cylinder. A displacement assembly is arranged above the flow stabilizing cylinder and the calibration cylinder, and the displacement assembly is used for transposing the vibrating element of the vibrating viscometer between the flow stabilizing cylinder and the calibration cylinder. The application can automatically detect the viscosity of water-based marking paint based on the vibrating viscometer, and can automatically complete the calibration work under the set time and conditions, so that the precision requirement of use is met, and the reliability of water-based marking paint viscosity detection is improved. Through the automatic calibration work, the labor intensity of the inspection personnel and the labor cost of the enterprise can be reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of water-based paint viscosity detection, and particularly relates to a water-based marking production line viscosity automatic detection device. BACKGROUND

[0002] With the increasingly stringent global environmental regulations and the deepening of the concept of sustainable development, the market share of water-based paint, as a green alternative to traditional solvent-based paint, is continuously expanding at an average annual compound growth rate of 8.3%. As the most core rheological parameter of water-based paint, viscosity directly determines the construction performance, film forming quality and physical and chemical properties of the final product. For example, high viscosity will lead to uneven coating and sagging, while low viscosity may cause pigment sedimentation and reduced hiding power. In industrial production, accurate control of paint viscosity can reduce more than 30% of material waste and improve production efficiency by 15-20%. Therefore, establishing an efficient and reliable viscosity detection system has become a key technical link for water-based paint production enterprises to realize intelligent and fine production.

[0003] Traditional offline viscosity detection methods (such as rotary viscometer and falling ball viscometer) have inherent defects such as long detection period and strong sample destruction, which are difficult to meet the real-time monitoring needs of modern continuous production. The emergence of vibration type viscosity detection technology provides a revolutionary solution for the industry. Its core principle is to measure the attenuation characteristics of the vibration probe in the fluid to invert the fluid viscosity. This technology has fast response speed, can realize millisecond-level dynamic data acquisition, is convenient for seamless docking with DCS system to realize whole process control, realizes integrated design, and is therefore mostly used for online real-time detection of paint viscosity in water-based paint production process.

[0004] Although the vibration type viscosity detection technology has shown significant advantages, its automatic correction mechanism is relatively lacking in actual application. The existing equipment relies on manual periodic calibration and cannot adapt to dynamic disturbances such as changes in material composition, fluctuations in environmental temperature and humidity during production process. Research shows that after 72 hours of continuous operation, the detection error will accumulate to ±8%. Therefore, the vibration type viscometer on the existing production line is basically used for about 48 hours, then it is disassembled, manually corrected, and then reassembled to meet the accuracy of its use. This way is time-consuming and labor-intensive, increasing the cost of use and labor cost. SUMMARY

[0005] The technical problem solved by the present application is to overcome the shortcomings of the prior art, provide a water-based marking production line viscosity automatic detection device, the present application automatically detects the viscosity of the water-based marking paint based on a vibrating viscometer, and can automatically complete the correction work under the set time and conditions, meet the precision requirements of its use, and improve the reliability of the water-based marking paint viscosity detection. Through automatic correction work, the labor intensity of the inspectors and the labor cost of the enterprise can also be reduced.

[0006] The technical solution adopted by the present application to solve the problems existing in the prior art is:

[0007] A water-based marking production line viscosity automatic detection device, comprising a vibrating viscometer. The vibrating element of the vibrating viscometer is inserted into the inside of the flow stabilizing cylinder, and the outside of the flow stabilizing cylinder is parallelly arranged with a correction cylinder.

[0008] The bottom of the flow stabilizing cylinder is connected with a paint inlet pipe, and the side wall of the flow stabilizing cylinder is connected with a paint outlet pipe, and the vibrating element is lower than the through opening of the paint outlet pipe and the flow stabilizing cylinder.

[0009] The top of the flow stabilizing cylinder and the correction cylinder is provided with a displacement assembly, which is used to change the position of the vibrating element of the vibrating viscometer between the flow stabilizing cylinder and the correction cylinder.

[0010] Preferably, a flow stabilizing plate is arranged above the through opening of the paint inlet pipe and the flow stabilizing cylinder in the inside of the flow stabilizing cylinder, the outer diameter of the flow stabilizing plate is greater than the inner diameter of the through opening of the paint inlet pipe and the flow stabilizing cylinder, the outer diameter of the flow stabilizing plate is smaller than the inner diameter of the flow stabilizing cylinder, and the flow stabilizing plate is connected with the inner wall of the flow stabilizing cylinder through a rod.

[0011] Preferably, the outside of the correction cylinder is connected with a liquid discharge pipe and a liquid inlet pipe, the liquid inlet pipe is connected with a liquid pump in series, and the liquid inlet pipe is connected with a liquid storage tank.

[0012] Preferably, the inside of the correction cylinder is provided with a cleaning assembly, the liquid inlet pipe is connected with the cleaning assembly, the end of the liquid discharge pipe is provided with a three-way valve, two outlets of the three-way valve are connected with a liquid return pipe and a waste liquid pipe respectively, the liquid return pipe is connected with the liquid storage tank, and the end of the waste liquid pipe is connected with a waste liquid tank.

[0013] Preferably, the cleaning assembly comprises an inner sleeve ring groove and an annular cover which are buckled with each other, a plurality of liquid injection pipes are connected with the inner side of the inner sleeve ring groove in a penetrating manner, the outside of the annular cover is connected with a hard pipe which is connected with the cavity between the inner sleeve ring groove and the annular cover in a penetrating manner, and the hard pipe is connected with the liquid inlet pipe in a penetrating manner.

[0014] Preferably, a cleaning ring is fixedly connected below the inner sleeve ring groove and arranged coaxially, and a plurality of brushes are arranged on the inner wall of the cleaning ring.

[0015] Preferably, the second telescopic device is fixed outside the correction cylinder, and the telescopic part of the second telescopic device is connected with a pull rod, and the pull rod is fixedly connected with the annular cover or the hard tube.

[0016] Preferably, the liquid spraying pipes are arranged in a ring array around the inner ring groove axis, and the liquid spraying pipes are arc-shaped pipes, and the reverse thrust of the liquid sprayed by the liquid spraying pipes drives the rotation of the inner ring groove.

[0017] Preferably, the upper and lower ends of the outer side edge of the inner ring groove are respectively provided with a ring-shaped convex edge, the inner side edge of the annular cover is respectively provided with a clamping ring at the upper and lower ends, and the ring-shaped convex edge is sleeved outside the clamping ring.

[0018] Preferably, the hard tube and the liquid inlet pipe are connected through a soft tube.

[0019] Compared with the prior art, the application has the beneficial effects:

[0020] (1) The flow velocity of the paint near the measurement point of the vibration element is reduced by the expansion of the flow stabilizing cylinder and the flow guiding of the flow stabilizing plate, the interference on the vibration element is reduced, the paint near the measurement point of the vibration element is continuously updated, and the timeliness and continuity of the viscosity detection of the paint are ensured.

[0021] (2) The vibration element is automatically transferred from the detection flow stabilizing cylinder to the inside of the correction cylinder for automatic correction, so that the accuracy of the vibration element is ensured when the continuous working time exceeds the threshold.

[0022] (3) The vibration element is cleaned by the cleaning assembly in the correction cylinder, and then corrected to further improve the correction accuracy.

[0023] (4) The calibration solution for correction uses the cleaning agent for cleaning, which simplifies the system structure and reduces the cost under the premise of ensuring the correction requirement. BRIEF DESCRIPTION OF DRAWINGS

[0024] The application will be further described below in combination with the drawings and examples.

[0025] Figure 1 FIG. 1 is a structural diagram of a viscosity automatic detection device for a water-based marking production line according to the application,

[0026] Figure 2 FIG. 2 is a sectional view of the viscosity automatic detection device for the water-based marking production line according to the application,

[0027] Figure 3 FIG. 3 is a structural diagram of a cleaning assembly of the vibration element in the viscosity automatic detection device for the water-based marking production line according to the application,

[0028] Figure 4 FIG. 4 is a structural diagram of a displacement assembly of the vibration element in the viscosity automatic detection device for the water-based marking production line according to the application,Figure 3 First sectional view,

[0029] Figure 5 for Figure 3 The second sectional view,

[0030] Figure 6 This is a structural diagram showing the assembly after the annular cover has been removed for cleaning.

[0031] Figure 7 This is a diagram of the cleaning and correction fluid supply system in an automated viscosity testing device for a water-based marking production line, as described in this application.

[0032] In the diagram: 1-Flow stabilizer, 101-Paint inlet pipe, 102-Paint outlet pipe, 103-Flow stabilizer plate, 2-Vibrating viscometer, 201-Vibrating element, 3-Fixing component, 4-First telescopic device, 401-Telescopic rod, 5-Horizontal guide rail, 6-Calibration cylinder, 601-Drain pipe, 7-Three-way valve, 8-Return pipe, 9-Waste pipe, 10-Cleaning assembly, 1001-Inner annular groove, 10 011-Annular flange, 1002-Spray pipe, 1003-Annular cover, 10031-Snap-fit ​​ring, 1004-Rigid pipe, 1005-Straight rod, 1006-Cleaning ring, 1007-Brush, 11-Hose, 12-Inlet pipe, 13-Pull rod, 14-Second telescopic device, 15-Misaligned connecting plate, 16-Bracket, 17-Waste liquid tank, 18-Storage tank, 19-Liquid pump. Detailed Implementation

[0033] The accompanying drawings provide a more detailed description of an automated viscosity testing device for a water-based marking production line, but this is not intended to limit the scope of the application.

[0034] An automated viscosity testing device for a water-based marking production line, comprising: Figures 1 to 7 As shown, this includes a vibratory viscometer 2. Currently, existing viscometers capable of detecting liquid viscosity mainly include rotational viscometers, capillary viscometers, falling ball viscometers, vibratory viscometers, and ultrasonic viscometers, each with its own characteristics and applications. Vibratory viscometers measure viscosity by detecting the vibration characteristics of an object in a liquid; common types include tuning fork and torsional viscometers. Their advantages include fast response speed, suitability for online monitoring and process control, and particular suitability for high-temperature, high-pressure, or corrosive fluids. However, they are not suitable for very viscous samples. Water-based road marking paint does not fall within the viscous range; therefore, a vibratory viscometer is more suitable for online monitoring during the production process of water-based road marking paint.

[0035] The vibrating element 201 of the vibrating viscometer 2 is inserted into the inside of the flow stabilizing cylinder 1, and the calibration cylinder 6 is arranged parallel to the outside of the flow stabilizing cylinder 1.

[0036] The bottom of the flow stabilizing cylinder 1 is connected with a paint inlet pipe 101, and the sidewall of the flow stabilizing cylinder 1 is connected with a paint outlet pipe 102. The vibration element 201 is lower than the through opening of the paint outlet pipe 102 and the flow stabilizing cylinder 1, ensuring that the vibration element 201 is completely immersed in the liquid, making the detection effect more reliable.

[0037] Because in the process of detecting the viscosity of the liquid, the liquid is in a static condition, the detection effect is best, because in the static condition, the state of the liquid is more stable, reducing the influence of external factors (such as flow rate, turbulence, etc.) on the measurement result. Therefore, in this case, the vibration element is less disturbed, and can provide more stable and repeatable viscosity readings. The static liquid can better ensure the consistency of the environment around the vibration element, avoiding the problem of boundary layer changes or non-uniformity caused by liquid flow. This helps to reduce measurement errors and improve accuracy.

[0038] However, in the production line of water-based marking paint, the water-based paint is flowing, and if the vibrating viscometer 2 is directly installed on the pipeline for conveying the water-based paint, the water-based paint flows at a high speed, which greatly disturbs the vibration element 201 and makes the measurement inaccurate.

[0039] Therefore, the application sets the above-mentioned flow stabilizing cylinder 1, the paint inlet pipe 101 flows upward from the bottom of the flow stabilizing cylinder 1, and then is discharged from the paint outlet pipe 102 located above the sidewall of the flow stabilizing cylinder 1. The inner diameter of the flow stabilizing cylinder 1 is greater than the inner diameter of the paint inlet pipe 101, and specifically the inner diameter of the flow stabilizing cylinder 1 is 5 to 7 times the inner diameter of the paint inlet pipe 101. At the same time, the inner diameter of the paint outlet pipe 102 is greater than the inner diameter of the paint inlet pipe 101, and is 2 to 3 times the inner diameter of the paint inlet pipe 101. In this way, when the water-based paint flows from the paint inlet pipe 101 into the flow stabilizing cylinder 1, the flow rate rapidly decreases due to the rapid expansion of the space, and tends to be in a static state, thereby reducing the disturbance to the vibration element 201 and improving the detection accuracy.

[0040] In order to further reduce the interference to the vibrating element 201, the inside of the flow stabilizing cylinder 1 is provided with a flow stabilizing plate 103 above the paint inlet pipe 101 and the through hole of the flow stabilizing cylinder 1, the outer diameter of the flow stabilizing plate 103 is greater than the inner diameter of the paint inlet pipe 101 and the through hole of the flow stabilizing cylinder 1, the outer diameter of the flow stabilizing plate 103 is less than the inner diameter of the flow stabilizing cylinder 1, and the flow stabilizing plate 103 is connected to the inner wall of the flow stabilizing cylinder 1 through a rod. The flow stabilizing plate 103 is located directly below the measuring point of the vibrating element 201. By arranging the flow stabilizing plate 103, the flow path of the water-based paint discharged from the paint inlet pipe 101 is blocked by the flow stabilizing plate 103, and then the water-based paint is diverted to the four sides of the flow stabilizing plate 103 and flows again. During the flow process, the viscosity of the paint drives the paint near the vibrating element 201 to flow. In this way, the flow rate of the paint near the vibrating element 201 can be further reduced, the interference to the vibrating element 201 can be reduced, and the paint near the measuring point of the vibrating element 201 can be continuously updated, thereby ensuring the timeliness and continuity of the viscosity detection of the paint.

[0041] The flow stabilizing cylinder 1 and the correction cylinder 6 are provided with a displacement assembly above them, and the displacement assembly is used to displace the vibrating element 201 of the vibrating viscometer 2 between the flow stabilizing cylinder 1 and the correction cylinder 6.

[0042] In this embodiment, the displacement assembly includes a first telescopic device 4 and a horizontal guide rail 5, and the first telescopic device 4 and the horizontal guide rail 5 are both electric control components, which are prior art. The fixed part of the first telescopic device 4 is fixedly connected to the sliding part of the horizontal guide rail 5, and the end of the telescopic rod 401 of the first telescopic device 4 is fixedly connected to the vibrating viscometer 2 through the fixing piece 3.

[0043] The horizontal guide rail 5 is arranged above the flow stabilizing cylinder 1 and the correction cylinder 6, and the top of the flow stabilizing cylinder 1 and the correction cylinder 6 are both provided with a through hole for the vibrating element 201 to pass through. When the vibrating viscometer 2 needs to be corrected, the vibrating element 201 is pulled out upwardly through the first telescopic device 4, and then is displaced to the above of the correction cylinder 6 through the horizontal guide rail 5. The telescopic rod 401 is extended, and the vibrating element 201 enters the correction cylinder 6 to be corrected. The support 16 fixedly connects the displacement assembly, the flow stabilizing cylinder 1 and the correction cylinder 6 to each other.

[0044] The correction time is mainly determined by the following two conditions:

[0045] 1. The paint outlet pipe 102 is made into an L-shaped pipe or a Z-shaped pipe, and a transparent observation window is arranged on the vertical section of the paint outlet pipe 102. A camera or a sensor is arranged outside the observation window. When the vibrating viscometer 2 is used for more than 48 hours, and the camera or the sensor detects that there is no water-based paint flowing in the vertical pipe of the paint outlet pipe 102, the vibrating viscometer 2 is transferred from the flow stabilizing cylinder 1 to the inside of the correction cylinder 6 for correction.

[0046] II. When the vibration type viscometer 2 continuously works for 60 to 65 hours, the vibration type viscometer 2 is transported from the steady flow cylinder 1 to the inside of the calibration cylinder 6 for calibration.

[0047] In order to avoid the falling of sundries through the through hole on the top of the steady flow cylinder 1 or the calibration cylinder 6 after the vibration type viscometer 2 is transported, two cover plates can be connected on the sliding part of the horizontal guide rail 5, the two cover plates are arranged on the two sides of the first telescopic device 4, the top surfaces of the steady flow cylinder 1 and the calibration cylinder 6 are flush, and when the first telescopic device 4 moves left and right, one of the two cover plates covers the through hole on the top surface of the steady flow cylinder 1 or the calibration cylinder 6.

[0048] The calibration cylinder 6 is externally connected with a liquid discharge pipe 601 and a liquid inlet pipe 12, the liquid inlet pipe 12 is connected with a liquid pump 19 in series, and the liquid inlet pipe 12 is connected with a liquid storage tank 18.

[0049] Since the water-based paint may be attached to the vibration element 201, the water-based paint attached to the surface of the vibration element 201 needs to be cleaned during calibration of the vibration element 201, so as to improve the accuracy of calibration. Therefore, the cleaning assembly 10 is arranged in the calibration cylinder 6, the liquid inlet pipe 12 is connected with the cleaning assembly 10, the end of the liquid discharge pipe 601 is provided with a three-way valve 7, two outlets of the three-way valve 7 are respectively connected with a liquid return pipe 8 and a waste liquid pipe 9, the liquid return pipe 8 is connected with the liquid storage tank 18, and the end of the waste liquid pipe 9 is connected with a waste liquid tank 17.

[0050] The cleaning assembly 10 comprises an inner sleeve ring groove 1001 and an annular cover 1003 which are buckled to each other, a plurality of liquid injection pipes 1002 are connected through the inner side of the inner sleeve ring groove 1001, the annular cover 1003 is externally connected with a hard pipe 1004 which is connected through the cavity between the inner sleeve ring groove 1001 and the annular cover 1003, and the hard pipe 1004 is connected with the liquid inlet pipe 12.

[0051] The cleaning ring 1006 arranged coaxially is fixedly connected through a straight rod 1005 below the inner sleeve ring groove 1001, and a plurality of brushes 1007 are arranged on the inner wall of the cleaning ring 1006.

[0052] The second telescopic device 14 is fixedly arranged outside the calibration cylinder 6, the telescopic part of the second telescopic device 14 is connected with a pull rod 13 through a misaligned connecting plate 15, the misaligned connecting plate 15 can change the arrangement position of the second telescopic device 14, so as to avoid interference with the vibration type viscometer 2.

[0053] The pull rod 13 is fixedly connected with the annular cover 1003 or the hard pipe 1004, and the hard pipe 1004 is connected with the liquid inlet pipe 12 through the flexible pipe 11.

[0054] In order to further optimize the cleaning effect, several liquid spraying pipes 1002 are arranged in a ring array around the inner annular groove 1001 axis, the liquid spraying pipe 1002 is an arc-shaped pipe, the liquid spraying pipe 1002 sprays liquid, and the reverse thrust drives the inner annular groove 1001 to rotate.

[0055] The outer side edge of the inner annular groove 1001 is provided with a ring-shaped convex edge 10011 at the upper and lower ends, respectively, and the inner side edge of the ring-shaped cover 1003 is provided with a clamping ring 10031 at the upper and lower ends, respectively, and the ring-shaped convex edge 10011 is sleeved outside the clamping ring 10031.

[0056] When the vibrating viscometer 2 is transported above the calibration cylinder 6, the telescopic rod 401 is elongated, the vibrating element 201 is inserted into the calibration cylinder 6, and the two are coaxially arranged. Then the cleaning assembly 10 is moved up through the second telescopic device 14, the liquid pump 19 pumps the cleaning solvent in the liquid storage tank 18 into the liquid inlet pipe 12, and then sprays it through the liquid spraying pipe 1002. During the movement of the cleaning assembly 10, the liquid sprayed by the liquid spraying pipe 1002 hits the vibrating element 201, which washes the water-based paint on the surface of the vibrating element 201, and under the action of the reaction force of the liquid impact, the inner annular groove 1001 rotates, and further drives the brush 1007 to rotate, further cleaning the vibrating element 201, and optimizing the cleaning effect.

[0057] During the cleaning process, the electrically controlled three-way valve 7 opens the waste liquid pipe 9, and the cleaned solvent flows into the waste liquid tank 17 through the waste liquid pipe 9. After cleaning, the three-way valve 7 is closed, and the cleaning solvent is injected into the calibration cylinder 6, which is used as a calibration solution. After the vibrating element 201 is calibrated, the three-way valve 7 is opened and connected to the liquid return pipe 8, and the solvent in the calibration cylinder 6 flows back to the liquid storage tank 18.

[0058] The above describes the embodiments of the present application in detail in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. An automatic viscosity detection device for water-based marking production line, comprising a vibrating viscometer (2), characterized in that: the vibrating element (201) of the vibrating viscometer (2) is inserted into the inside of the flow cylinder (1), and the outside of the flow cylinder (1) is arranged in parallel with the calibration cylinder (6); the bottom of the flow cylinder (1) is connected with the paint inlet pipe (101) in a through manner, the sidewall of the flow cylinder (1) is connected with the paint outlet pipe (102) in a through manner, and the vibrating element (201) is lower than the through opening of the paint outlet pipe (102) and the flow cylinder (1); the inner diameter of the flow cylinder (1) is 5 to 7 times of the inner diameter of the paint inlet pipe (101), and the inner diameter of the paint outlet pipe (102) is 2 to 3 times of the inner diameter of the paint inlet pipe (101); the flow cylinder (1) and the calibration cylinder (6) are arranged above the displacement assembly, and the displacement assembly is used to change the position of the vibrating element (201) of the vibrating viscometer (2) between the flow cylinder (1) and the calibration cylinder (6); the outside of the calibration cylinder (6) is connected with the liquid discharge pipe (601) and the liquid inlet pipe (12) in a through manner, the liquid inlet pipe (12) is connected with the liquid pump (19) in series, and the liquid inlet pipe (12) is connected with the liquid storage tank (18) in a through manner; the inside of the calibration cylinder (6) is provided with the cleaning assembly (10), and the liquid inlet pipe (12) is connected with the cleaning assembly (10) in a through manner; the cleaning assembly (10) comprises the inner sleeve ring groove (1001) and the annular cover (1003) which are buckled with each other, a plurality of liquid injection pipes (1002) are connected with the inner side of the inner sleeve ring groove (1001) in a through manner, the annular cover (1003) is connected with the hard pipe (1004) which is connected with the cavity between the inner sleeve ring groove (1001) and the annular cover (1003) in a through manner, and the hard pipe (1004) is connected with the liquid inlet pipe (12) in a through manner; the coaxially arranged cleaning ring (1006) is fixedly connected below the inner sleeve ring groove (1001), and a plurality of brushes (1007) are arranged on the inner wall of the cleaning ring (1006); the plurality of liquid injection pipes (1002) are arranged in a ring array around the axis of the inner sleeve ring groove (1001), the liquid injection pipe (1002) is an arc-shaped pipe, and the counter thrust of the liquid sprayed by the liquid injection pipe (1002) drives the rotation of the inner sleeve ring groove (1001); the second telescopic device (14) is fixedly arranged outside the calibration cylinder (6), the telescopic part of the second telescopic device (14) is connected with the pull rod (13), and the pull rod (13) is fixedly connected with the annular cover (1003) or the hard pipe (1004); the upper and lower ends of the outer side of the inner sleeve ring groove (1001) are respectively protrudingly provided with a ring-shaped protruding edge (10011), the inner side of the annular cover (1003) is respectively protrudingly provided with a clamping ring (10031) at the upper and lower ends, and the ring-shaped protruding edge (10011) is arranged outside the clamping ring (10031); the timing of calibration is mainly judged according to the following two conditions: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ One, the paint outlet pipe (102) is made into an L-shaped pipe or a Z-shaped pipe, a transparent observation window is arranged on the vertical section of the paint outlet pipe (102), a camera or a sensor is arranged outside the observation window, when the vibration type viscometer (2) is used for more than 48 hours, and the camera shoots or the sensor detects that there is no water-based paint flowing in the vertical pipe part of the paint outlet pipe (102), the vibration type viscometer (2) is transferred from the steady flow cylinder (1) to the inside of the correction cylinder (6) for correction; Two, when the vibration type viscometer (2) is continuously used for 60 to 65 hours, the vibration type viscometer (2) is transferred from the steady flow cylinder (1) to the inside of the correction cylinder (6) for correction.

2. The water-based marking production line viscosity automatic detection device according to claim 1, wherein: the steady flow cylinder (1) is provided with a steady flow plate (103) above the through hole of the steady flow cylinder (1) and the paint inlet pipe (101), the outer diameter of the steady flow plate (103) is greater than the inner diameter of the through hole of the steady flow cylinder (1) and the paint inlet pipe (101), the outer diameter of the steady flow plate (103) is less than the inner diameter of the steady flow cylinder (1), and the steady flow plate (103) is connected to the inner wall of the steady flow cylinder (1) through a rod.

3. The water-based marking production line viscosity automatic detection device according to claim 1 or 2, wherein: the end of the drain pipe (601) is provided with a three-way valve (7), two outlets of the three-way valve (7) are respectively connected with a liquid return pipe (8) and a waste liquid pipe (9), the liquid return pipe (8) is connected with a liquid storage tank (18), and the end of the waste liquid pipe (9) is connected with a waste liquid tank (17).

4. The water-based marking production line viscosity automatic detection device according to claim 3, wherein: the hard pipe (1004) and the liquid inlet pipe (12) are connected through a soft pipe (11). ​ ​ ​

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