Automatic viscosity detection device for water-based marking production line

Abstract

The invention relates to an automatic viscosity detection device for a water-based marking production line, and belongs to the technical field of water-based paint viscosity detection. Comprising a vibrating viscometer. A vibration element of the vibration type viscometer is inserted into the flow stabilizing cylinder, and the correction cylinder is arranged outside the flow stabilizing cylinder in parallel. The bottom of the flow stabilizing cylinder is in through connection with a coating inlet pipe, the side wall of the flow stabilizing cylinder is in through connection with a coating outlet pipe, and the vibration element is lower than a through opening of the coating outlet pipe and the flow stabilizing cylinder. A displacement assembly is erected above the flow stabilizing cylinder and the correcting cylinder, and the displacement assembly is used for changing the position of a vibrating element of the vibrating viscometer between the flow stabilizing cylinder and the correcting cylinder. The viscosity of the water-based marking paint is automatically detected on the basis of the vibrating viscometer, correction work can be automatically completed under the set time and conditions, the use precision requirement of the water-based marking paint is met, and the reliability of viscosity detection of the water-based marking paint is improved. And through automatic correction work, the labor intensity of inspectors and the labor cost of enterprises can be reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of water-based paint viscosity detection, and specifically relates to an automatic viscosity detection device for a water-based marking production line. Background Art

[0002] With the increasingly stringent global environmental regulations and the deepening of the concept of sustainable development, water-based paints, as a green alternative to traditional solvent-based paints, are continuing to expand their market share at an average annual compound growth rate of 8.3%. Viscosity, as the most core rheological parameter of water-based paints, directly determines the construction performance, film quality and physical and chemical properties of the paint. For example, high viscosity can lead to uneven coating and sagging, while low viscosity may cause problems such as pigment sedimentation and reduced hiding power. In industrial production, precise control of paint viscosity can reduce material waste by more than 30% 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 manufacturers to achieve intelligent and refined production.

[0003] Traditional offline viscosity detection methods (such as rotational viscometers and falling ball viscometers) have inherent defects such as long detection cycles and highly destructive sampling, which make it difficult to meet the real-time monitoring needs of modern continuous production. The emergence of vibration viscosity detection technology has provided a revolutionary solution for the industry. Its core principle is to invert the fluid viscosity by measuring the attenuation characteristics of the vibration frequency of the vibration probe in the fluid. This technology has a fast response speed and can achieve millisecond-level dynamic data acquisition. It is easy to seamlessly connect with the DCS system to achieve full process control and realize integrated design. Therefore, it is mostly used for online real-time detection of coating viscosity during the production of water-based coatings.

[0004] Although the vibration viscosity detection technology has shown significant advantages, its automatic correction mechanism is relatively lacking in practical applications. Existing equipment relies on manual regular calibration and cannot adapt to dynamic interference such as changes in material composition and fluctuations in ambient temperature and humidity during the production process. Studies have shown that after 72 hours of continuous operation, the detection error will accumulate to ±8%. Therefore, the vibration viscometer on the existing production line is basically used for about 48 hours, disassembled, manually calibrated, and then reinstalled to meet its accuracy. This method is time-consuming and labor-intensive, and increases the cost of use and labor costs. Summary of the invention

[0005] The technical problem to be solved by this application is to overcome the shortcomings of the prior art and provide an automatic viscosity detection device for a water-based road marking production line. This application automatically detects the viscosity of water-based road marking paint based on a vibration viscometer, and can automatically complete the calibration work under the set time and conditions, meet the accuracy requirements of its use, and improve the reliability of the viscosity detection of water-based road marking paint. Through automated calibration work, the labor intensity of inspectors and the labor cost of enterprises can also be reduced.

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

[0007] An automatic viscosity detection device for a water-based marking production line includes a vibration viscometer. The vibration element of the vibration viscometer is inserted into a flow stabilizing tube, and a calibration tube is arranged in parallel outside the flow stabilizing tube.

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

[0009] A displacement assembly is mounted above the flow stabilizing cylinder and the calibration cylinder. The displacement assembly is used to displace the vibrating element of the vibration viscometer between the flow stabilizing cylinder and the calibration cylinder.

[0010] Preferably, a flow stabilizer plate is arranged inside the flow stabilizer tube just above the paint inlet pipe and the through-port of the flow stabilizer tube. The outer diameter of the flow stabilizer plate is larger than the inner diameter of the paint inlet pipe and the through-port of the flow stabilizer tube, and the outer diameter of the flow stabilizer plate is smaller than the inner diameter of the flow stabilizer tube. The flow stabilizer plate is connected to the inner wall of the flow stabilizer tube through a rod.

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

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

[0013] Preferably, the cleaning assembly includes an inner ring groove and an annular cover shell which are interlocked with each other, a plurality of liquid spray pipes are connected through the inner side of the inner ring groove, and a hard pipe which is connected through the chamber between the inner ring groove and the annular cover shell is connected to the outside of the annular cover shell, and the hard pipe is connected through the liquid inlet pipe.

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

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

[0016] Preferably, a plurality of liquid spraying pipes are distributed in a circular array around the axis of the inner ring groove, and the liquid spraying pipes are arc-shaped pipes. The reverse thrust of the liquid sprayed from the liquid spraying pipes drives the inner ring groove to rotate.

[0017] Preferably, an annular convex edge is respectively provided at the upper and lower ends of the outer edge of the inner ring groove, and a clamping ring is respectively provided inside the upper and lower ends of the inner edge of the annular cover shell, and the annular convex edge is sleeved on the outside of the clamping ring.

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

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) By expanding the capacity of the flow stabilizing tube and guiding the flow stabilizing plate, the flow freezing of the paint near the measuring point of the vibration element is reduced, reducing the interference to the vibration element. At the same time, the paint near the measuring point of the vibration element can be continuously updated to ensure the timeliness and continuity of the paint viscosity detection.

[0021] (2) The vibration element is automatically transferred from the flow stabilizing tube for detection to the calibration tube for calibration through the displacement assembly, and the vibration element is automatically calibrated to avoid the decrease in accuracy after the continuous working time exceeds the threshold, thereby ensuring its measurement accuracy.

[0022] (3) Inside the calibration cylinder, the vibrating element is cleaned by a cleaning assembly, and calibration is performed after cleaning to further improve the calibration accuracy.

[0023] (4) The calibration solution used for calibration uses cleaning detergent to simplify the system structure and reduce costs while ensuring calibration requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 This application is a structural diagram of an automatic viscosity detection device for a water-based marking production line.

[0026] Figure 2 This is a cross-sectional view of an automatic viscosity detection device for a water-based marking production line in this application.

[0027] Figure 3 This is a structural diagram of a cleaning assembly of a vibrating element in an automated viscosity detection device for a water-based road marking production line.

[0028] Figure 4 for Figure 3 The first cross-sectional view of

[0029] Figure 5 for Figure 3 The second cross-sectional view of

[0030] Figure 6 The structural diagram after the annular cover is removed for cleaning assembly.

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

[0032] In the figure: 1-flow stabilizing cylinder, 101-paint inlet pipe, 102-paint outlet pipe, 103-flow stabilizing plate, 2-vibration viscometer, 201-vibration element, 3-fixing member, 4-first telescopic device, 401-telescopic rod, 5-horizontal guide rail, 6-calibration cylinder, 601-liquid discharge pipe, 7-three-way valve, 8-liquid return pipe, 9-waste liquid pipe, 10-cleaning assembly, 1001-inner sleeve ring groove, 10 011-annular convex edge, 1002-liquid spraying pipe, 1003-annular cover, 10031-clamping ring, 1004-hard pipe, 1005-straight rod, 1006-cleaning ring, 1007-brush, 11-hose, 12-liquid inlet pipe, 13-pull rod, 14-second telescopic device, 15-offset connecting plate, 16-bracket, 17-waste liquid tank, 18-liquid storage tank, 19-liquid pump. DETAILED DESCRIPTION

[0033] The automatic viscosity detection device for a water-based marking production line of the present application is further described in detail in conjunction with the accompanying drawings, but this is not intended to limit the present application.

[0034] An automatic viscosity detection device for a water-based marking production line, comprising Figures 1 to 7 As shown, it includes a vibration viscometer 2. At present, the viscometers that can detect the viscosity of liquids in the prior art mainly include rotational viscometers, capillary viscometers, falling ball viscometers, vibration viscometers and ultrasonic viscometers, etc. Various types of viscometers have corresponding characteristics and application fields. Among them, the vibration viscometer measures the viscosity by the vibration characteristics of the object in the liquid. The common ones are tuning fork type and torsion type. Its advantage is fast response speed, suitable for online monitoring and process control, especially suitable for high temperature, high pressure or corrosive fluids, but not very suitable for very viscous samples. The viscosity of water-based road marking paint does not belong to the viscous range, so it is more appropriate to use a vibration viscometer for online detection in the production process of water-based road marking paint.

[0035] The vibration element 201 of the vibration viscometer 2 is inserted into the flow stabilizing tube 1 , and a calibration tube 6 is arranged in parallel outside the flow stabilizing tube 1 .

[0036] The bottom of the flow stabilizing tube 1 is connected with a paint inlet pipe 101, and the side wall of the flow stabilizing tube 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 tube 1, ensuring that the vibration element 201 is completely immersed in the liquid, making the detection effect more reliable.

[0037] Since the best test results are obtained when the liquid is at rest, the liquid is more stable under resting conditions, which reduces the impact of external factors (such as flow rate, turbulence, etc.) on the measurement results. Therefore, in this case, the vibrating element is less disturbed and can provide more stable and repeatable viscosity readings. Static liquids make it easier to ensure the consistency of the environment around the vibrating element, avoiding boundary layer changes or unevenness caused by liquid flow. This helps reduce measurement errors and improve accuracy.

[0038] However, on the water-based road marking paint production line, the water-based paint is flowing. If the vibration viscometer 2 is directly installed on the pipeline for conveying the water-based paint, the water-based paint flows quickly, which greatly interferes with the vibration element 201 and causes inaccurate measurement.

[0039] Therefore, the present application is provided with the above-mentioned stabilizer tube 1, and the paint inlet pipe 101 flows upward from the bottom of the stabilizer tube 1, and then is discharged from the paint outlet pipe 102 located above the side wall of the stabilizer tube 1. The inner diameter of the stabilizer tube 1 is larger than the inner diameter of the paint inlet pipe 101, and specifically the inner diameter of the stabilizer tube 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 larger than the inner diameter of the paint inlet pipe 101, which 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 interior of the stabilizer tube 1, due to the rapid expansion of the space, the flow rate drops rapidly and tends to a static state, thereby reducing the interference with the vibration element 201 and improving the detection accuracy.

[0040] At the same time, in order to further reduce the interference to the vibration element 201, a flow stabilizing plate 103 is arranged inside the flow stabilizing tube 1, which is located just above the through-hole of the paint inlet pipe 101 and the flow stabilizing tube 1. The outer diameter of the flow stabilizing plate 103 is larger than the inner diameter of the through-hole of the paint inlet pipe 101 and the flow stabilizing tube 1, and the outer diameter of the flow stabilizing plate 103 is smaller than the inner diameter of the flow stabilizing tube 1. The flow stabilizing plate 103 is connected to the inner wall of the flow stabilizing tube 1 through a rod. The flow stabilizing plate 103 is located just below the measuring point of the vibration element 201. Through the setting of 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 diverted to the surroundings of the flow stabilizing plate 103 for further flow. During the flow process, the viscosity of the paint drives the paint near the vibration element 201 to flow. In this way, the flow velocity of the paint near the vibration element 201 can be further reduced, the interference to the vibration element 201 can be reduced, and at the same time, the paint near the measuring point of the vibration element 201 can be continuously updated to ensure the timeliness and continuity of the paint viscosity detection.

[0041] A displacement assembly is mounted above the flow stabilizing cylinder 1 and the calibration cylinder 6 . The function of the displacement assembly is to displace the vibration element 201 of the vibration viscometer 2 between the flow stabilizing cylinder 1 and the calibration cylinder 6 .

[0042] In this embodiment, the displacement assembly includes a first telescopic device 4 and a horizontal guide rail 5. Both the first telescopic device 4 and the horizontal guide rail 5 use an electronic control component, which is a prior art. The fixed portion of the first telescopic device 4 is fixedly connected to the sliding portion 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 vibration viscometer 2 through the fixing member 3.

[0043] The horizontal guide rail 5 is erected just above the flow stabilizing cylinder 1 and the calibration cylinder 6. The tops of the flow stabilizing cylinder 1 and the calibration cylinder 6 are both provided with through holes for the vibrating element 201 to enter and exit. When the vibration viscometer 2 needs to be calibrated, the vibrating element 201 is pulled up and taken out by the first telescopic device 4, and then displaced by the horizontal guide rail 5 to just above the calibration cylinder 6, the telescopic rod 401 is extended, and the vibrating element 201 enters the calibration cylinder 6 for calibration. The bracket 16 fixes the displacement assembly, the flow stabilizing cylinder 1, and the calibration cylinder 6 to each other.

[0044] The timing of the correction 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 provided in the vertical section of the paint outlet pipe 102. A camera or a sensor is provided outside the observation window. When the vibration viscometer 2 is used for more than 48 hours, and the camera takes a picture or the sensor detects that there is no water-based paint flowing in the vertical pipe section of the paint outlet pipe 102, the vibration viscometer 2 is transferred from the steady flow cylinder 1 to the inside of the calibration cylinder 6 for calibration;

[0046] 2. When the vibrating viscometer 2 has been working continuously for 60 to 65 hours, the vibrating viscometer 2 is transferred from the steady flow cylinder 1 to the calibration cylinder 6 for calibration.

[0047] In order to prevent debris from falling from the through hole on the top of the stabilizing cylinder 1 or the correction cylinder 6 after the vibrating viscometer 2 is transported, two cover plates can be connected to the sliding part of the horizontal guide rail 5. The two cover plates are arranged on both sides of the first telescopic device 4. The top surfaces of the stabilizing cylinder 1 and the correction cylinder 6 are flush. 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 stabilizing cylinder 1 or the correction cylinder 6.

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

[0049] Since water-based paint may be attached to the vibration element 201, it is necessary to clean the water-based paint attached to the surface of the vibration element 201 when calibrating the vibration element 201 to improve the accuracy of the calibration. To this end, a cleaning assembly 10 is provided inside the calibration cylinder 6, the liquid inlet pipe 12 is connected to the cleaning assembly 10, and a three-way valve 7 is provided at the end of the liquid discharge pipe 601. The two outlets of the three-way valve 7 are respectively connected to a return liquid pipe 8 and a waste liquid pipe 9, the return liquid pipe 8 is connected to a liquid storage tank 18, and the end of the waste liquid pipe 9 is connected to a waste liquid tank 17.

[0050] The cleaning assembly 10 includes an inner annular groove 1001 and an annular cover shell 1003 which are interlocked with each other. The inner side of the inner annular groove 1001 is connected with a plurality of liquid spray pipes 1002. The outer side of the annular cover shell 1003 is connected with a hard pipe 1004 which is connected with the chamber between the inner annular groove 1001 and the annular cover shell 1003. The hard pipe 1004 is connected with the liquid inlet pipe 12.

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

[0052] A second telescopic device 14 is fixed to the outside of the calibration cylinder 6 , and the telescopic portion of the second telescopic device 14 is connected to the pull rod 13 through an offset connecting plate 15 . The offset connecting plate 15 can change the arrangement position of the second telescopic device 14 , thereby avoiding interference with the vibration viscometer 2 .

[0053] The pull rod 13 is fixedly connected to the annular housing 1003 or the hard tube 1004. The hard tube 1004 is connected to the liquid inlet pipe 12 via a hose 11.

[0054] In order to further optimize the cleaning effect, a plurality of liquid spraying pipes 1002 are distributed in a circular array around the axis of the inner ring groove 1001. The liquid spraying pipes 1002 are arc-shaped pipes. The reverse thrust of the liquid sprayed by the liquid spraying pipes 1002 drives the inner ring groove 1001 to rotate.

[0055] An annular convex edge 10011 is respectively provided at the upper and lower ends of the outer edge of the inner ring groove 1001 , and a clamping ring 10031 is respectively provided inside the upper and lower ends of the inner edge of the annular cover 1003 , and the annular convex edge 10011 is sleeved on the outside of the clamping ring 10031 .

[0056] After the vibration viscometer 2 is transferred to the top of the calibration cylinder 6, the telescopic rod 401 is extended, and the vibration element 201 is inserted into the calibration cylinder 6, and the two are arranged coaxially. Then the cleaning assembly 10 is moved upward by the second telescopic device 14, and the liquid pump 19 pumps the cleaning solvent in the liquid storage tank 18 into the liquid inlet pipe 12, and then sprays it out through the liquid spray pipe 1002. During the upward movement of the cleaning assembly 10, the liquid sprayed by the liquid spray pipe 1002 hits the vibration element 201, cleaning the water-based paint on its surface. Under the reaction force of the liquid impact, the inner ring groove 1001 rotates, thereby driving the brush 1007 to rotate, further cleaning the vibration element 201, and optimizing the cleaning effect.

[0057] During the cleaning process, the electrically controlled three-way valve 7 opens the passage of the waste liquid pipe 9, and the solvent after cleaning flows into the waste liquid tank 17 through the waste liquid pipe 9. After the cleaning is completed, the three-way valve 7 is closed, and the cleaning solvent continues to be injected into the calibration cylinder 6. At this time, the cleaning solvent is used as a calibration solution. After the vibration element 201 is calibrated, the passage connecting the three-way valve 7 and the return pipe 8 is opened, and the solvent inside the calibration cylinder 6 flows back to the liquid storage tank 18.

[0058] The implementation methods of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. An automatic viscosity detection device for a water-based marking production line, comprising a vibration viscometer (2), characterized in that: The vibrating element (201) of the vibrating viscometer (2) is inserted into the interior of the flow stabilizing cylinder (1), and a calibration cylinder (6) is arranged in parallel outside the flow stabilizing cylinder (1); The bottom of the flow stabilizing tube (1) is connected to a paint inlet pipe (101), the side wall of the flow stabilizing tube (1) is connected to a paint outlet pipe (102), and the vibration element (201) is lower than the through opening between the paint outlet pipe (102) and the flow stabilizing tube (1); A displacement assembly is mounted above the flow stabilizing cylinder (1) and the calibration cylinder (6). The function of the displacement assembly is to displace the vibration element (201) of the vibration viscometer (2) between the flow stabilizing cylinder (1) and the calibration cylinder (6).

2. According to claim 1, the automatic viscosity detection device for a water-based marking production line is characterized by: A flow stabilizing plate (103) is arranged inside the flow stabilizing tube (1) and is located just above the through-opening of the paint inlet pipe (101) and the flow stabilizing tube (1). The outer diameter of the flow stabilizing plate (103) is larger than the inner diameter of the through-opening of the paint inlet pipe (101) and the flow stabilizing tube (1). The outer diameter of the flow stabilizing plate (103) is smaller than the inner diameter of the flow stabilizing tube (1). The flow stabilizing plate (103) is connected to the inner wall of the flow stabilizing tube (1) via a rod.

3. The automatic viscosity detection device for a water-based marking production line according to claim 1 or 2, characterized in that: 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 serially connected with a liquid pump (19), and the liquid inlet pipe (12) is connected with a liquid storage tank (18).

4. The automatic viscosity detection device for a water-based marking production line according to claim 3 is characterized by: A cleaning assembly (10) is provided inside the calibration cylinder (6), the liquid inlet pipe (12) is connected to the cleaning assembly (10), a three-way valve (7) is provided at the end of the liquid discharge pipe (601), two outlets of the three-way valve (7) are respectively connected to a liquid return pipe (8) and a waste liquid pipe (9), the liquid return pipe (8) is connected to a liquid storage tank (18), and the end of the waste liquid pipe (9) is connected to a waste liquid tank (17).

5. The automatic viscosity detection device for a water-based marking production line according to claim 4 is characterized by: The cleaning assembly (10) comprises an inner annular groove (1001) and an annular cover (1003) which are interlocked with each other, a plurality of liquid spray pipes (1002) are connected through the inner side of the inner annular groove (1001), and the outer side of the annular cover (1003) is connected with a hard pipe (1004) which is connected through the chamber between the inner annular groove (1001) and the annular cover (1003), and the hard pipe (1004) is connected through the liquid inlet pipe (12).

6. The automatic viscosity detection device for a water-based marking production line according to claim 5 is characterized by: A coaxially arranged cleaning ring (1006) is fixedly connected below the inner ring groove (1001), and a plurality of brushes (1007) are arranged on the inner wall of the cleaning ring (1006).

7. An automatic viscosity detection device for a water-based road marking production line according to claim 4, 5 or 6, characterized in that: A second telescopic device (14) is fixed to the outside of the correction cylinder (6), and the telescopic part of the second telescopic device (14) is connected to a pull rod (13), and the pull rod (13) is fixedly connected to the annular cover (1003) or the hard tube (1004).

8. The automatic viscosity detection device for a water-based road marking production line according to claim 7 is characterized by: A plurality of liquid spraying pipes (1002) are distributed in a circular array around the axis of the inner ring groove (1001); the liquid spraying pipes (1002) are arc-shaped pipes; the reverse thrust of the liquid sprayed from the liquid spraying pipes (1002) drives the inner ring groove (1001) to rotate.

9. The automatic viscosity detection device for a water-based road marking production line according to claim 8, characterized in that: An annular convex edge (10011) is respectively provided at the upper and lower ends of the outer edge of the inner sleeve ring groove (1001), and a clamping ring (10031) is respectively provided inside the upper and lower ends of the inner edge of the annular cover shell (1003), and the annular convex edge (10011) is sleeved on the outside of the clamping ring (10031).

10. The automatic viscosity detection device for a water-based marking production line according to claim 7, characterized in that: The hard tube (1004) and the liquid inlet tube (12) are connected through a hose (11).

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