Viscosity detection system

Abstract

The utility model relates to a viscosity detection system. The device comprises a pulping device used for providing pulp; the detection pipeline is connected with the outlet of the pulping device in an on-off manner; the cleaning pipeline is connected with the detection pipeline in an on-off manner; the sample detection device comprises a detection cup and a viscosity detection device for detecting the viscosity of the slurry in the detection cup, the detection cup comprises a detection cup inlet, a first outlet, a second outlet and an overflow port, and the detection cup inlet is connected with the detection pipeline in an on-off manner; an inlet of the sample storage device is respectively connected with the first outlet and the detection pipeline in an on-off manner; an inlet of the waste storage device is connected with the second outlet in an on-off mode and communicated with the overflow opening; and the conveying pipeline is respectively connected with the outlets of the pulping device, the sample storage device and the waste storage device in an on-off manner. According to the utility model, automatic sampling, automatic stock layout, automatic cleaning and automatic detection operation can be realized, the detection accuracy is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of online detection, in particular to a viscosity detection system. Background Art

[0002] During the pulping process, to ensure the quality of the finished pulp, it is usually necessary to sample and test semi-finished and finished pulps or solutions. When abnormal test results are found, the production process parameters must be adjusted promptly to ensure that the product quality meets the requirements. However, existing technologies have some problems: laboratory testing consumes a lot of manpower and time. Laboratory technicians need to manually take samples and bring them back to the laboratory for testing, which increases labor costs and testing time. Online viscometers have poor detection accuracy, and their results deviate significantly from laboratory testing. They can only monitor the overall fluctuation trend of viscosity and cannot accurately reflect the actual viscosity, making them unable to replace laboratory testing. In addition, online viscometers are too expensive, usually 5 to 7 times the price of laboratory viscometers. If they are widely installed on all production lines, the cost will be too high. Summary of the Invention

[0003] To this end, the utility model provides a viscosity detection system, which can realize automatic sampling, automatic sample arrangement, automatic cleaning, and automatic detection operations, thereby improving the measurement accuracy and reducing the cost.

[0004] In order to solve the above technical problems, the utility model provides a viscosity detection system, comprising:

[0005] a pulping device for providing pulp;

[0006] a detection pipeline, connected to the outlet of the pulping device in an on-off manner;

[0007] A cleaning pipeline, connected to the detection pipeline in an on-off manner;

[0008] A sample detection device, comprising a detection cup and a viscosity detection device for detecting the viscosity of the slurry in the detection cup, wherein the detection cup comprises a detection cup inlet, a first outlet, a second outlet, and an overflow port, and the detection cup inlet is connectably connected to the detection pipeline;

[0009] a sample storage device, the inlet of which is respectively connectable and disconnectable to the first outlet and the detection pipeline;

[0010] a waste storage device, the inlet of which is respectively connectable and disconnectable to the second outlet and communicates with the overflow port;

[0011] The delivery pipeline is connected to the outlets of the pulping device, the sample storage device and the waste storage device respectively in a disconnectable manner.

[0012] In one embodiment of the present utility model, a sampling valve is installed on the detection pipeline, a first control valve is installed between the first outlet and the inlet of the sample storage device, a second control valve is installed between the second outlet and the waste storage device, and a third control valve is installed on the cleaning pipeline.

[0013] In one embodiment of the present utility model, a delivery pump, a fourth control valve, a fifth control valve and a waste liquid pump are installed in sequence on the delivery pipeline; wherein, the outlet of the pulping device is connected to the delivery pump, the outlet of the sample storage device is installed between the fourth control valve and the fifth control valve, the outlet of the waste storage device is installed between the fifth control valve and the waste liquid pump, the sixth control valve is installed at the inlet of the detection cup, and the seventh control valve is installed at the inlet of the sample storage device.

[0014] In one embodiment of the present invention, the sample detection device further comprises an identification device for identifying the liquid state in the detection cup, wherein the liquid state comprises the liquid level state in the detection cup and the slurry adhesion state of the detection rod of the viscosity detection device.

[0015] In one embodiment of the present invention, the viscosity detection device includes a rotational viscometer, and the rotor of the rotational viscometer extends into the detection cup.

[0016] In one embodiment of the present invention, a constant temperature device is further included. A jacket layer is provided on the outer wall of the detection cup. The jacket layer includes a constant temperature water inlet and a constant temperature water outlet. The constant temperature device includes a constant temperature water tank respectively connected to the constant temperature water inlet and the constant temperature water outlet.

[0017] In one embodiment of the present utility model, the detection cup and the sample storage device are respectively provided with a first ultrasonic cleaning device and a second ultrasonic cleaning device, and the first ultrasonic cleaning device and the second ultrasonic cleaning device respectively include ultrasonic vibrators correspondingly arranged on the outer walls of the detection cup and the sample storage device.

[0018] In one embodiment of the present invention, a first weighing device is provided at the bottom of the sample storage device; and a second weighing device is provided at the bottom of the waste storage device.

[0019] In one embodiment of the present invention, an exhaust port is provided on the upper portion of the sample detection device, and the exhaust port is connected to a vacuum pump, and the vacuum pump is used to create a slight negative pressure inside the sample detection device.

[0020] The above technical solution of the utility model has the following advantages compared with the prior art:

[0021] The viscosity testing system described in this utility model can automatically complete sampling, sample arrangement, cleaning, and testing operations without manual intervention, reducing labor costs and significantly shortening testing time. Compared with traditional laboratory testing, it greatly reduces the time required for manual sampling and experimental operation, and improves production efficiency.

[0022] This new device features an automatic cleaning function that cleans the test pipes, test cup, and viscometer rotor. Ultrasonic cleaning further enhances the cleaning effect, ensuring no sample residue between tests, maintaining the device's accuracy and test stability. A CMOS camera or guided wave radar level gauge monitors the liquid level and sample adhesion status, automatically determining the completion of the sampling and cleaning process. This improves the automation and reliability of the operation and avoids errors caused by manual judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0024] Figure 1 It is a structural schematic diagram of the viscosity detection device of the utility model.

[0025] Description of the accompanying drawings:

[0026] 1. Pulping device;

[0027] 2. Detection pipeline; 21. Sampling valve;

[0028] 3. Cleaning pipeline; 31. Third control valve;

[0029] 4. Sample detection device; 41. Detection cup; 411. Overflow port; 412. Constant temperature water inlet; 413. Constant temperature water outlet; 414. Constant temperature water tank; 42. Viscosity detection device; 43. Constant temperature device; 44. Liquid state identification device; 45. First ultrasonic cleaning device; 46. First control valve; 47. Second control valve; 48. Sixth control valve; 49. Exhaust port;

[0030] 5. Sample storage device; 51. Seventh control valve; 52. Second ultrasonic cleaning device; 53. First weighing device;

[0031] 6. Waste storage device; 61. Second weighing device;

[0032] 7. Delivery pipeline; 71. Delivery pump; 72. Fourth control valve; 73. Fifth control valve; 74. Waste liquid pump. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0034] In the present invention, if there is a description of directions (up, down, left, right, front and back), it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0035] In this utility model, "several" means one or more, "multiple" means more than two, "greater than," "less than," "exceeds," etc. are understood to exclude the number itself; "above," "below," "within," etc. are understood to include the number itself. In the description of this utility model, the use of "first" or "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0036] In this utility model, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection or electrical connection or mutual communication; and internal connection between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of these terms in this utility model based on the specific content of the technical solution.

[0037] Reference Figure 1 As shown, a viscosity detection system of the utility model includes:

[0038] A pulping device 1 for providing pulp;

[0039] A detection pipeline 2 is connected to the outlet of the pulping device 1 in an on-off manner;

[0040] A cleaning pipeline 3 is connected to the detection pipeline 2 in an on-off manner;

[0041] The sample detection device 4 includes a detection cup 41 and a viscosity detection device 42 for detecting the viscosity of the slurry in the detection cup 41. The detection cup 41 includes an inlet of the detection cup 41, a first outlet, a second outlet, and an overflow port 411. The inlet of the detection cup 41 is connected to the detection pipeline 2 in a disconnectable manner.

[0042] a sample storage device 5, the inlet of which is respectively connected to the first outlet and the detection pipeline 2 in a disconnectable manner;

[0043] a waste storage device 6, the inlet of which is respectively connected to the second outlet in a switchable manner and communicates with the overflow port 411;

[0044] The delivery pipeline 7 is connected to the outlets of the pulping device 1 , the sample storage device 5 and the waste storage device 6 in a disconnectable manner.

[0045] Specifically, a sampling valve 21 is installed on the detection pipeline 2, a first control valve 46 is installed between the first outlet and the inlet of the sample storage device 5, a second control valve 47 is installed between the second outlet and the waste storage device 6, and a third control valve 31 is installed on the cleaning pipeline 3.

[0046] Specifically, a delivery pump 71, a fourth control valve 72, a fifth control valve 73 and a waste liquid pump 74 are installed in sequence on the delivery pipeline 7; wherein, the outlet of the pulping device 1 is connected to the delivery pump 71, the outlet of the sample storage device 5 is installed between the fourth control valve 72 and the fifth control valve 73, the outlet of the waste storage device 6 is installed between the fifth control valve 73 and the waste liquid pump 74, the sixth control valve 48 is installed at the inlet of the detection cup 41, and the seventh control valve 51 is installed at the inlet of the sample storage device 5.

[0047] Specifically, the sample detection device 4 further includes an identification device for identifying the liquid state in the detection cup 41 , wherein the liquid state includes the liquid level state in the detection cup 41 and the slurry adhesion state of the detection rod of the viscosity detection device 42 .

[0048] Specifically, the viscosity detection device 42 includes a (laboratory) rotational viscometer, and the rotor of the rotational viscometer extends into the detection cup 41 .

[0049] In one embodiment, the identification device includes a (high-definition color) CMOS camera or a guided wave radar level gauge. For example, when the slurry fills the detection cup 41 and overflows into the overflow port 411, the CMOS camera (or guided wave radar level gauge) detects that the liquid level has reached a predetermined height, thereby controlling the valve to close and stop the flow of sample. The CMOS camera can also identify the state of slurry adhesion on the viscometer rotor.

[0050] Specifically, it also includes a constant temperature device 43. The outer wall of the detection cup 41 is provided with a jacket layer, the jacket layer includes a constant temperature water inlet 412 and a constant temperature water outlet 413, and the constant temperature device 43 includes a constant temperature water tank 414 respectively connected to the constant temperature water inlet 412 and the constant temperature water outlet 413.

[0051] Specifically, the detection cup 41 and the sample storage device 5 are respectively provided with a first ultrasonic cleaning device 45 and a second ultrasonic cleaning device 52. The first ultrasonic cleaning device 45 and the second ultrasonic cleaning device 52 respectively include ultrasonic vibrators correspondingly arranged on the outer walls of the detection cup 41 and the sample storage device 5.

[0052] Specifically, a first weighing device 53 is provided at the bottom of the sample storage device 5, and a second weighing device 61 is provided at the bottom of the waste storage device 6. Both the first weighing device 53 and the second weighing device 61 are electronic platform scales.

[0053] In this embodiment, the first through seventh control valves 46, 51 are pneumatic ball valves. A PLC control system is employed to control the aforementioned valves, pumps, and detection devices. An exhaust port 49 is provided at the top of the sample detection device 4. This exhaust port 49 is connected to a vacuum pump for applying a slight negative pressure to the interior of the sample detection device 4.

[0054] In this embodiment, the material in the slurry making device 1 (slurry making tank) is lithium battery negative electrode slurry.

[0055] Workflow:

[0056] Step 1: Automatically take fresh samples to be tested.

[0057] The sampling valve 21 and the seventh control valve 51 are opened, and the fresh sample slurry in the slurry making device 1 enters the sample storage device 5 .

[0058] A first weighing device 53 is located at the bottom of the sample storage device 5. The PLC continuously reads the weight increment of the weighing device. When the weight reaches a set value (set value = 500g, which is greater than the volumetric weight of the slurry in the test pipeline), it indicates that the test pipeline 2 is now filled with fresh slurry to be tested.

[0059] Step 2: The detection cup 41 automatically obtains a fresh sample.

[0060] Close the seventh control valve 51 and open the sixth control valve 48. The fresh slurry in the detection pipeline 2 continues to flow into the detection cup 41.

[0061] The CMOS camera continuously monitors the slurry level. When the slurry overflows the test cup 41, the sixth control valve 48 and sampling valve 21 are immediately closed. At this point, the slurry level is aligned with the viscometer rotor's detection scale line, and the overflowing slurry flows through overflow port 411 into the waste storage device 6. (When assembling the test tank, align the viscometer rotor's detection scale line with the opening of the test cup 41, and secure the viscometer and test cup 41 completely.)

[0062] Step 3: Constant temperature control of the sample to be tested.

[0063] The detection cup 41 is a jacketed structure, and the jacket layer is connected to a constant temperature water tank 414 , through which constant temperature water circulates all the time, so that the slurry flowing into the detection cup 41 is always in a constant temperature water bath.

[0064] After the sixth control valve 48 is closed, the PLC starts timing. When the set constant temperature time is reached (the set constant temperature time = 2 minutes, which is enough to ensure that the sample slurry reaches the constant temperature water bath temperature), the sample slurry to be tested has been standing in the constant temperature water bath for 2 minutes, so that the sample slurry temperature has reached the constant temperature water bath temperature.

[0065] Step 4: Automatic detection.

[0066] After the PLC counts down for 2 minutes, the viscometer automatically starts to test the viscosity of the sample slurry. After the test is completed, the viscometer automatically sends the test results to the PLC, which determines whether the viscosity is qualified.

[0067] The acceptable range of slurry viscosity for each formula is preset inside the PLC.

[0068] When the test result is within the qualified range, the first control valve 46 is opened, and the test sample flows into the sample storage device 5 by gravity.

[0069] If the test result is not within the qualified range, the second control valve 47 is opened, and the test sample flows into the waste storage device 6 by gravity. At the same time, the PLC will issue an alarm signal, and the slurry in the slurry tank will be manually re-adjusted. After the manual viscosity adjustment is completed, the first step is restarted and the slurry viscosity is re-tested.

[0070] Step 5: Automatically discharge test samples.

[0071] The CMOS camera identifies the slurry level in the detection cup 41 and closes the first control valve 46 or the second control valve 47 after confirming that the slurry has been completely discharged.

[0072] Step 6: Discharge the slurry.

[0073] After the sample viscosity test is qualified, the delivery pump 71 is started to discharge the slurry in the slurry making device 1 , and then the fourth control valve 72 is opened to discharge the slurry in the sample storage device 5 into the subsequent process through the delivery pump 71 .

[0074] If the sample viscosity test fails, the waste liquid pump 74 is started to discharge the unqualified sample in the waste storage device 6 through the waste liquid pump 74; at the same time, the fifth control valve 73 is opened to discharge the slurry that initially flows into the sample storage device 5 through the waste liquid pump 74.

[0075] The PLC continuously reads the weight value of the first weighing device 53 or the second weighing device 61. When the value stabilizes, it indicates that the slurry has been discharged, and the fourth control valve 72, or the waste liquid pump 74 and the fifth control valve 73 are closed and opened.

[0076] Step 7: Automatically clean the test cup 41 and the viscometer rotor.

[0077] Open third control valve 31 and sixth control valve 48. Cleaning liquid automatically flows into detection cup 41. The CMOS camera continuously monitors the cleaning liquid level. When the cleaning liquid overflows detection cup 41, sixth control valve 48 and third control valve 31 are immediately closed. At this point, the cleaning liquid level is aligned with the viscometer rotor's detection scale line, and the overflowed cleaning liquid flows through overflow port 411 into waste storage device 6.

[0078] The PLC activates the first ultrasonic cleaning device 45, which continuously ultrasonically cleans the test cup 41. After the cleaning time reaches a set value (set cleaning time = 5 minutes, which ensures that the viscometer rotor and test cup 41 are completely clean), the first ultrasonic cleaning device 45 is turned off, and the second control valve 47 is opened to drain the waste cleaning liquid.

[0079] Step 8: Automatic cleaning effect recognition.

[0080] The CMOS camera identifies the viscometer rotor cleaning effect (identification standard: no slurry adheres to the rotor). If it is not cleaned thoroughly, perform step 7 again.

[0081] Step 9: Clean the sample storage tank.

[0082] After the slurry in the sample storage device 5 is discharged, the fourth control valve 72 is closed, the third control valve 31 and the seventh control valve 51 are opened, and the sample storage tank is flushed with the cleaning fluid.

[0083] The PLC continuously reads the value of the first weighing device 53. When the value reaches the set value (set value = 5000g, the weight of the sample tank filled with cleaning liquid is 5000g), it indicates that the sample tank is now full of cleaning liquid.

[0084] The PLC activates the second ultrasonic cleaning device 52 to continuously ultrasonically clean the sample storage device 5. After the cleaning reaches the set time (set cleaning time = 5 minutes, which is sufficient to ensure that the sample storage tank is completely clean), the second ultrasonic cleaning device 52 is turned off and the first waste liquid pump 74 is turned on to discharge the cleaning waste liquid.

[0085] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A viscosity detection system, characterized in that: include: A pulping device (1) for providing pulp; A detection pipeline (2) is connected to the outlet of the pulping device (1) in a disconnectable manner; A cleaning pipeline (3) is connected to the detection pipeline (2) in an on-off manner; A sample detection device (4) comprising a detection cup (41) and a viscosity detection device (42) for detecting the viscosity of the slurry in the detection cup (41), wherein the detection cup (41) comprises a detection cup (41) inlet, a first outlet, a second outlet, and an overflow port (411), and the detection cup (41) inlet is connected to the detection pipeline (2) in an on-off manner; A sample storage device (5), the inlet of which is respectively connected to the first outlet and the detection pipeline (2) in a disconnectable manner; A waste storage device (6), the inlet of which is connected to the second outlet in a switchable manner and communicates with the overflow port (411); The delivery pipeline (7) is connected to the outlets of the pulping device (1), the sample storage device (5), and the waste storage device (6) in a disconnectable manner.

2. A viscosity detection system according to claim 1, characterized in that: A sampling valve (21) is installed on the detection pipeline (2), a first control valve (46) is installed between the first outlet and the inlet of the sample storage device (5), a second control valve (47) is installed between the second outlet and the waste storage device (6), and a third control valve (31) is installed on the cleaning pipeline (3).

3. A viscosity detection system according to claim 1, characterized in that: The delivery pipeline (7) is sequentially installed with a delivery pump (71), a fourth control valve (72), a fifth control valve (73) and a waste liquid pump (74); wherein the outlet of the pulping device (1) is connected to the delivery pump (71), the outlet of the sample storage device (5) is installed between the fourth control valve (72) and the fifth control valve (73), the outlet of the waste storage device (6) is installed between the fifth control valve (73) and the waste liquid pump (74), the sixth control valve (48) is installed at the inlet of the detection cup (41), and the seventh control valve (51) is installed at the inlet of the sample storage device (5).

4. A viscosity detection system according to claim 1, characterized in that: The sample detection device (4) further comprises an identification device for identifying the state of the liquid in the detection cup (41), wherein the liquid state comprises the liquid level state in the detection cup (41) and the slurry adhesion state of the detection rod of the viscosity detection device (42).

5. A viscosity detection system according to claim 1, characterized in that: The viscosity detection device (42) comprises a rotational viscometer, and the rotor of the rotational viscometer extends into the detection cup (41).

6. A viscosity detection system according to claim 1, characterized in that: The apparatus further comprises a constant temperature device (43), wherein a jacket layer is provided on the outer wall of the detection cup (41), wherein the jacket layer comprises a constant temperature water inlet (412) and a constant temperature water outlet (413), and wherein the constant temperature device (43) comprises a constant temperature water tank (414) respectively connected to the constant temperature water inlet (412) and the constant temperature water outlet (413).

7. A viscosity detection system according to claim 1, characterized in that: The detection cup (41) and the sample storage device (5) are respectively provided with a first ultrasonic cleaning device (45) and a second ultrasonic cleaning device (52), and the first ultrasonic cleaning device (45) and the second ultrasonic cleaning device (52) respectively include ultrasonic vibrators correspondingly arranged on the outer walls of the detection cup (41) and the sample storage device (5).

8. A viscosity detection system according to claim 1, characterized in that: A first weighing device (53) is provided at the bottom of the sample storage device (5); and a second weighing device (61) is provided at the bottom of the waste storage device (6).

9. A viscosity detection system according to claim 1, characterized in that: An exhaust port (49) is provided on the upper portion of the sample detection device (4), and the exhaust port (49) is connected to a vacuum pump, and the vacuum pump is used to create a slight negative pressure inside the sample detection device (4).

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