Automatic slurry sampling and testing device and method

Abstract

The present application relates to a kind of slurry automatic sampling detection device and method, belong to casting technical field, solve the operation error of manual sampling measurement in prior art, and when sensor measurement, sensor occupies a lot of space, sensor's probe on the board hard knot of nodule scratch barrel wall, influence dipping shell and slurry to the problem of sensor probe wear and tear.Slurry automatic sampling detection device and method, device includes: pressure control component, measurement component, water control component and sampling cup;Pressure control component is used to control the pressure in the sampling cup in the process of sampling and returning, to extract and return slurry;Measurement component is used to detect slurry in sampling cup;Water control component is used to control waterway to clean the device after detection and based on slurry detection result to slurry quantitative water supplement.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of casting technology, in particular to a slurry automatic sampling and detecting device and method. BACKGROUND

[0002] As a near net shape forming method, investment casting has become the first choice for casting forming in various industries. However, in the process of shell making, the quality of slurry directly affects the quality of the shell, and the key indicators affecting the quality of slurry include viscosity, specific gravity, temperature, PH value, etc. Therefore, it is very important to detect the various physical and chemical numerical indicators of the slurry at regular intervals, which directly affects the yield of the shell. The existing detection methods for slurry include manual sampling measurement method and sensor online measurement method.

[0003] The manual sampling measurement method requires the measurement personnel to take a certain amount of slurry from the slurry barrel into a standard measuring cup, and measure the viscosity of the slurry by the time of slurry flowing out of the measuring cup. The PH value of the slurry is measured by PH test paper. The specific gravity of the slurry is measured by weighing a certain volume of slurry. This method not only consumes a lot of manpower and repeats the work, but also causes deviation in the measurement results due to human operation errors.

[0004] The sensor online measurement method directly installs viscosity meter, thermometer, specific gravity meter, PH meter, etc. in the slurry barrel for real-time measurement, and the measurement data is transmitted to the upper computer in real time, which eliminates the interference of human factors in manual sampling measurement. However, in practical application, due to the relatively large geometric size of each sensor, a large amount of space is occupied when it is fixed around the slurry barrel, thereby reducing the effective diameter of the slurry barrel and the size of the shell that can be immersed. At the same time, since the slurry is easy to surge when it rotates in the slurry barrel and hits the protrusions, a large amount of hardening nodules will be formed on the probe rods of the sensors, which not only scratches the barrel wall but also affects the immersion of the shell. Since the slurry is mainly composed of a mixture of zirconium powder, corundum powder, mullite powder and silica sol, it has a great abrasiveness to the sensor probe immersed in it, which easily damages the sensor and makes it invalid. SUMMARY

[0005] In view of the above analysis, the embodiments of the present application aim to provide a slurry automatic sampling and detecting device and method to solve the problems of labor intensity and operation error of the existing manual sampling measurement method, and the problems of a large amount of space occupied by the sensor, hardening nodules on the probe rods of the sensor scratching the barrel wall, affecting the immersion of the shell and the abrasion of the sensor probe by the slurry.

[0006] The main purpose of the present application is achieved by the following technical solutions:

[0007] The present application provides a slurry automatic sampling and detecting device, which comprises a pressure control component, a measuring component, a water control component and a sampling cup (5), wherein,

[0008] The pressure control assembly is used for controlling the pressure in the sampling cup (5) during sampling and returning to extract and return the slurry;

[0009] The measuring assembly is used for detecting the slurry in the sampling cup (5);

[0010] The water control assembly is used for controlling the water path to clean the detected device and quantitatively supplement the slurry based on the slurry detection result.

[0011] Further, the pressure control assembly comprises a vacuum pump (4), a vacuum pressure switch (11) and a vacuum gauge (13).

[0012] Further, the upper part of the sampling cup is provided with an air port; the vacuum pressure switch (11) and the vacuum gauge (13) are arranged on the pipeline between the vacuum pump (4) and the air port.

[0013] Further, the pressure control assembly further comprises a float (7) installed on the upper cover plate of the sampling cup (5), and the air port can be closed or opened with the movement of the float (7).

[0014] Further, the water control assembly comprises a water spraying ring (8) fixed on the upper cover plate of the sampling cup (5), and the water inlet is connected with a water source and the water outlet is located in the sampling cup (5).

[0015] Further, the water control assembly further comprises a flow meter (17) connected with the water inlet of the water spraying ring (8) through a pipeline.

[0016] Further, the lower cone of the sampling cup (5) is connected with a slurry barrel (32) and a waste water barrel (2) respectively.

[0017] Further, the measuring assembly comprises a pH meter (6), a viscometer (9) and a specific gravity meter (12), which are all installed on the sampling cup (5).

[0018] On the other hand, the present application provides a slurry automatic sampling and detecting method, which adopts the slurry automatic sampling and detecting device of any one of the above, and comprises the following steps:

[0019] The vacuum pump (4) is started to extract the slurry in the slurry barrel (32) into the sampling cup (5);

[0020] When the preset pressure value of the vacuum pressure switch (11) is reached, the vacuum pump (4) is stopped, and the measuring assembly is used to detect the slurry;

[0021] After the slurry detection is completed, air is injected into the sampling cup (5) through the air port to return the slurry into the slurry tank (32);

[0022] When the slurry in the sampling cup (5) is completely returned to the slurry tank (32), the water source is opened to clean the sampling detection device.

[0023] Further, when the viscosity of the slurry in the slurry detection result exceeds the preset standard value, the water source is opened to supplement the slurry in the slurry tank (32); when the water supplement amount displayed by the flow meter (17) reaches the preset value, the water supplement is stopped.

[0024] Compared with the prior art, the present application can achieve at least one of the following beneficial effects:

[0025] 1. The device can automatically collect the slurry sample in the sampling cup, measure through the sensor, return the slurry to the slurry tank after detection, clean the whole system, and automatically supplement the slurry when the viscosity of the slurry is out of standard, thereby reducing the labor intensity and measurement error caused by manual operation.

[0026] 2. In the process of detecting the slurry, the sensor is installed in the sampling cup instead of being directly immersed in the slurry tank, thereby avoiding the wear problem of the sensor probe caused by the slurry, prolonging the service life of the sensor, and effectively protecting the system and the measurement sensor.

[0027] 3. The device detects the slurry by pumping, avoids the immersion of the sensor in the slurry tank, thereby ensuring the maximum utilization of the internal space of the slurry tank and reducing the risk of contamination or caking of the slurry, thereby ensuring the stability and consistency of the slurry quality.

[0028] In the present application, the above technical solutions can be combined with each other to achieve more preferred combination schemes. Other features and advantages of the present application will be described in the subsequent specification, and some advantages will become apparent from the specification or will be understood by implementing the present application. The purpose and other advantages of the present application can be achieved and obtained from the contents specifically pointed out in the specification and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings are included to provide a further understanding of the present application and are incorporated herein and constitute a part of the specification. The drawings illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0030] Figure 1 FIG. 1 is a structural schematic view of a slurry automatic sampling detection device according to an embodiment of the present application;

[0031] Figure 2A flowchart of a slurry automatic sampling and detection method in an embodiment of the present application is shown in the figure.

[0032] Figure 3 A valve state diagram for slurry extraction detection in an embodiment of the present application is shown in the figure.

[0033] Figure 4 A valve state diagram for device cleaning in an embodiment of the present application is shown in the figure.

[0034] Reference signs:

[0035] 1 - support; 2 - wastewater bucket; 3 - electric control box; 4 - vacuum pump; 5 - sampling cup; 6 - PH meter; 7 - float; 8 - water spraying ring; 9 - viscosity meter; 10 - connecting pipe; 11 - vacuum pressure switch; 12 - specific gravity meter; 13 - vacuum gauge; 14 - water supply electromagnetic valve; 15 - air supply electromagnetic valve; 16 - vacuum hose; 17 - flow meter; 18 - water pipe; 19 - compressed air hose; 20 - ball valve; 21 - filter pressure reducing valve; 22 - two-position three-way electromagnetic valve (controls wastewater valve); 23 - two-position three-way electromagnetic valve (controls slurry valve); 24 - slurry suction hose; 25 - wastewater valve; 26 - slurry valve; 27 - sampling tube fixing seat; 28 - wastewater discharge hose; 29 - sampling tube; 30 - slurry filter screen; 31 - slurry; 32 - slurry bucket. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present application will be described in detail below with reference to the drawings, wherein the drawings constitute a part of this application and serve to explain the principles of the embodiments of the present application, but are not intended to limit the scope of the present application.

[0037] One specific embodiment of the present application discloses a slurry automatic sampling and detection device, as shown in the figure, which comprises a pressure control assembly, a measurement assembly, a water control assembly and a sampling cup 5. Figure 1

[0038] Specifically, the slurry automatic sampling and detection device automatically extracts a certain amount of slurry to a customized sampling cup for physicochemical parameter measurement by vacuum negative pressure mode, returns the slurry automatically after the measurement is completed, and then performs automatic cleaning. When the viscosity is out of standard, the device can also calculate the water supplement amount according to the current slurry viscosity to perform quantitative automatic water supplement for the slurry.

[0039] The slurry automatic sampling and detection device comprises a support 1 fixed on the ground for supporting the entire sampling system. In this embodiment, the support 1 is an aluminum alloy support made of 40cm*40cm aluminum alloy profiles and corresponding angle pieces.

[0040] The electric control box 3 is placed on the support 1, and the electric elements in the box are used for the control of the entire system as well as the collection, storage and transmission of sensor data. ​

[0041] Further, the pressure control assembly is used to control the pressure in the sampling cup 5 during sampling and returning to extract and return the slurry.

[0042] The pressure control assembly comprises a vacuum pump 4, a vacuum pressure switch 11 and a vacuum gauge 13; the upper part of the sampling cup 5 is provided with a gas port; the vacuum pressure switch 11 and the vacuum gauge 13 are arranged on the pipeline between the vacuum pump 4 and the gas port.

[0043] Specifically, the vacuum pump 4 is installed in the box above the electric control box 3 and below the sampling cup 5; in this embodiment, the model of the vacuum pump 4 is VI240-R32 anti-reflux type, the voltage is 220V, the power is 370W, the air extraction rate is 7.2m 3 / h, and the limit pressure is 0.2Pa.

[0044] The pipeline is a connecting pipe 10, one end of which is fixed on the gas port of the upper cover plate of the sampling cup 5 and communicates with the sampling cup 5, and the other end is connected with a gas supply electromagnetic valve 15; when the slurry is extracted, the gas is extracted outward, and when the slurry is returned and cleaned, the compressed air is flushed inward. Although the connecting pipe 10 is used for the transportation of gas, there will also be water vapor in the sampling cup 5, so the connecting pipe 10 needs to have excellent corrosion resistance, strength and durability; in this embodiment, the connecting pipe 10 can be made of 304 stainless steel.

[0045] The gas supply electromagnetic valve 15 is installed on the end of the connecting pipe 10 away from the gas port of the sampling cup 5 by screwing, and like the connecting pipe 10, it is made of corrosion-resistant and durable material; in this embodiment, the material of the gas supply electromagnetic valve 15 can be 304 stainless steel, the diameter is DN10, and the power supply is 24V.

[0046] The vacuum pressure switch 11 and the vacuum gauge 13 are arranged on the connecting pipe 10; the vacuum pressure switch 11 is used to monitor the pressure value in the device and control the stop of the vacuum pump 4 according to the set pressure threshold; in this embodiment, the model of the vacuum pressure switch 11 is MT-DPC45, the range is -100KPa~0, the power supply is 24V, and the output is PNP.

[0047] The vacuum gauge 13 is installed on the connecting pipe 10 by screwing, and is connected with the vacuum pump 4 through a vacuum hose 16; the vacuum gauge 13 can display the vacuum degree index in the connecting pipe 10, and the operator can monitor the operation of the device according to the degree of the vacuum gauge 13.

[0048] Further, the pressure control assembly further comprises a float 7 installed on the upper cover plate of the sampling cup 5, and the gas port can be closed or opened with the movement of the float 7.

[0049] Specifically, the float 7 includes a cylindrical float ball, a suction cup type silica gel sealing cover and a guide rod, the float 7 is fixed on the upper cover plate of the sampling cup 5 through a hanger and a nut, connected with the connecting pipe 10, and controls the gas to enter or exit the sampling cup 5; in the embodiment, the diameter of the float ball of the float 7 can be 50 mm, and the material is 304 stainless steel.

[0050] In the sampling process, the vacuum pump 4 is started, the gas in the sampling cup 5 is discharged through the connecting pipe 10, the vacuum hose 16 and the vacuum pump 4, the slurry is sucked from the bottom of the sampling cup 5 by forming negative pressure in the sampling cup 5, and the float 7 is lifted and moved upward as the liquid level rises, when the suction cup type silica gel sealing cover on the float 7 moves to the air port on the upper cover plate of the sampling cup 5 and blocks the air port, the negative pressure in the connecting pipe 10 rises, when the negative pressure in the connecting pipe 10 reaches the preset value of the vacuum pressure switch 11, the vacuum pump 4 stops working, at this time, the liquid level in the sampling cup 5 remains static.

[0051] The pressure control assembly further includes a filter pressure reducing valve 21 connected with the air source for providing compressed air, which is connected with the air supply electromagnetic valve 15 through a compressed air hose 19; in the embodiment, the model of the filter pressure reducing valve 21 is AirTAC-GFR20008F1, the material of the compressed air hose is PU, the diameter is φ8, and the model is AirTAC-US98A080050BU.

[0052] In the slurry returning process, the vacuum pump 4 is not started, the filter pressure reducing valve 21 and the air supply electromagnetic valve 15 are started, the compressed air passes through the connecting pipe 10 to push the suction cup type silica gel sealing cover of the float 7 to move downward, the compressed air enters the sampling cup 5 through the air port on the upper cover plate of the sampling cup 5, and the slurry in the sampling cup 5 is discharged through the lower part of the sampling cup 5 under the action of the positive pressure.

[0053] Further, the measuring assembly is used for detecting the slurry in the sampling cup 5.

[0054] The measuring assembly includes a PH meter 6, a viscometer 9 and a densimeter 12, which are all installed on the sampling cup 5.

[0055] Specifically, the PH meter 6 and the densimeter 12 are respectively installed on the side wall of the sampling cup 5, and the viscometer 9 is installed on the upper cover plate of the sampling cup 5.

[0056] The PH meter 6 is installed on the side wall of the middle section of the sampling cup 5 in a tilted manner by screwing, and the vertical angle with the sampling cup 5 is 75°, which is convenient for the slurry to flow downward and is convenient for cleaning; in the embodiment, the model of the PH meter 6 is InPro 4281i, the material is 316, and the insertion depth is 120 mm.

[0057] The viscosity meter 9 is vertically fixed on the upper cover plate of the sampling cup 5 by screwing, and needs to be noted that the viscosity meter 9 also has a temperature measuring function, and simultaneously measures the viscosity and temperature of the slurry. In the embodiment, the viscosity meter 9 adopts a vibration type measuring mode, the probe rod is made of 316L material and is smooth and regular to facilitate cleaning, the model is HYND-100, the measuring range is 0-10000 cp, the accuracy is ±0.5%, the power supply is 24V, and the output is 4-20mA.

[0058] The hydrometer 12 is installed on the side wall of the sampling cup 5 by flange connection, and in the embodiment, the hydrometer 12 adopts a tuning fork type measuring mode, the probe rod is made of 316L material and is smooth and regular to facilitate cleaning, the model is DKYCMDJ-TX, the DN50 flange, the insertion depth is 150mm, the material is 316L, the power supply is 24V, and the output is 4-20mA, and it needs to be noted that the flange for connecting the hydrometer 12 and the sampling cup 5 is made of transparent acrylic material.

[0059] In use, the slurry continuously rises in the sampling cup 5, and the detection probes of the viscosity meter 9, the hydrometer 12 and the PH meter 6 are all immersed. When the vacuum pump 4 stops working, the liquid surface is stable, and the sensors of the measuring assembly measure the physicochemical properties of the slurry in the sampling cup 5, and record and transmit the measured data.

[0060] Further, the water control assembly is used to control the waterway to clean the detected device and quantitatively supplement water to the slurry based on the detection result of the slurry.

[0061] Further, the water control assembly includes a water spraying ring 8 fixed on the upper cover plate of the sampling cup 5, the water inlet is connected with the water source, and the water outlet is located in the sampling cup 5.

[0062] Specifically, the water spraying ring 8 has a circular ring structure, the water inlet is connected with the water source through the water pipe 18, and the water outlet is composed of a plurality of small holes uniformly distributed around the circular ring. The small holes are divided into three rows on the cross section of the circular ring, and are respectively at angles of 0°, 45° and 135° with the horizontal line. When the water spraying ring 8 is used for cleaning, the umbrella-shaped jet flow of the small holes can be reflected and refracted by collision, so as to form cleaning coverage to all positions of the sampling cup. In the embodiment, the material of the water spraying ring 8 is 304 stainless steel.

[0063] The other end of the water pipe 18 is connected with the water supply ball valve 20, and the water supply electromagnetic valve 14 is installed in the middle, which is used to connect with the water source to control the opening and closing of the water flow; in the embodiment, the material of the water pipe 18 is 304 stainless steel.

[0064] The water supply electromagnetic valve 14 is installed on the water pipe 18 by screwing, and in the embodiment, the material of the water supply electromagnetic valve 14 is 304 stainless steel, the diameter is DN15, and the power supply is 24V.

[0065] A water supply ball valve 20 is installed at one end of the water pipe 18 away from the water inlet of the upper cover plate of the sampling cup 5. In this embodiment, the material of the water supply ball valve 20 is 304 stainless steel, and the diameter is DN15.

[0066] The water control assembly further comprises a flow meter 17 connected to the water inlet of the water spraying ring 8 through the water pipe 18, for controlling the water quantity during water replenishment for the slurry. In this embodiment, the flow meter 17 is a turbine flow meter with the model YHLW-Y-1015-3100000-D2 and the measurement range of 0-6 m 3 / h.

[0067] When the device is cleaned and watered, the ball valve 20, the water supply electromagnetic valve 14, the filter pressure reducing valve 21, and the air supply electromagnetic valve 15 are opened at the same time, and the sampling cup 5 is sprayed and cleaned through the water spraying ring 8. The compressed air enters the sampling cup 5 from the air port through the connecting pipe 10, and the cleaned wastewater or the water to be replenished is discharged from the sampling cup 5.

[0068] Further, the lower cone of the sampling cup 5 is connected to the slurry barrel 32 and the wastewater barrel 2, respectively.

[0069] Specifically, the upper cover plate and the lower cone of the sampling cup 5 are made of 304 stainless steel, and the middle section is made of transparent acrylic pipe for easy observation of the internal slurry. The upper cover plate and the lower cone of the sampling cup 5 are connected and sealed by the O-shaped sealing ring through bolt connection. The upper cover plate of the sampling cup 5 is provided with a threaded fixing seat for the viscometer 9, and the angle of the lower cone facilitates the flow of slurry.

[0070] The lower cone of the sampling cup 5 is connected to one end of the slurry suction hose 24 through a throat clamp for the transportation of slurry and water. The other end of the slurry suction hose 24 is connected to the wastewater valve 25 and the slurry valve 26 through a three-way connector, which is connected by a spiral steel wire pipe. In this embodiment, the material of the slurry suction hose 24 is polyurethane, and the inner diameter is φ20 mm.

[0071] One end of the wastewater valve 25 is connected to the slurry suction hose 24 through a three-way connector, and the other end is connected to the wastewater barrel 2 through a wastewater discharge hose 28. The wastewater valve 25 is also connected to the two-way three-way electromagnetic valve (control wastewater valve) 22 through the compressed air hose 19. In this embodiment, the model of the wastewater valve 25 is VMC25-120 DN25. The wastewater discharge hose 28 is a spiral steel wire pipe made of polyurethane with an inner diameter of φ20 mm.

[0072] The two-way three-way electromagnetic valve (control wastewater valve) 22 is fixed on the valve seat for receiving control signals to control the opening or closing of the wastewater valve 25. In this embodiment, the model of the two-way three-way electromagnetic valve (control wastewater valve) 22 is AirTAC-4V21008B.

[0073] The waste water bucket 2 is placed in the middle of the support 1, is made of polyethylene, and has a volume of 20 liters. When the waste water reaches a certain amount, it is taken away and poured out.

[0074] One end of the slurry valve 26 is connected with the slurry suction hose 24 through a tee joint, and the other end is connected with the sampling tube 29. The slurry valve 26 is also connected with the two-position three-way electromagnetic valve (controlling the slurry valve) 23 through the compressed air hose 19. In this embodiment, the model of the slurry valve 26 is VMC25-120 DN25.

[0075] The two-position three-way electromagnetic valve (controlling the slurry valve) 23 is fixed on the valve seat and receives a control signal to control the opening or closing of the slurry valve 26. In this embodiment, the model of the two-position three-way electromagnetic valve (controlling the slurry valve) 23 is AirTAC-4V21008B.

[0076] The other end of the slurry valve 26, which is away from the connection with the slurry suction hose 24, is connected with the sampling tube 29. The sampling tube 29 is clamped and fixed on the slurry bucket 32 through the sampling tube fixing seat 27. The lower end of the sampling tube 29 is connected with the slurry filter screen 30 in a screwing manner. The sampling tube 29 is made of 304 stainless steel, has an outer diameter of φ27 mm, and a wall thickness of 3.5 mm. The slurry filter screen 30 is made of 304 stainless steel and has a mesh diameter of 3 mm.

[0077] It should be noted that the sampling tube fixing seat 27 is fixedly connected with the mouth of the slurry bucket 32 through a bolt.

[0078] During the sampling / sampling return process, the slurry valve 26 is opened, and the waste water valve 25 is closed. At this time, the slurry 31 in the slurry bucket 32 is sucked into / discharged from the sampling cup 5 from the lower part of the sampling cup 5 through the sampling tube 29, the slurry valve 26, and the slurry suction hose 24.

[0079] During the water replenishing process, the slurry valve 26 is opened, and the waste water valve 25 is closed. The water in the sampling cup 5 enters the slurry bucket 32 from the lower part of the sampling cup 5 through the slurry suction hose 24, the slurry valve 26, and the sampling tube 29 in sequence, thereby replenishing the slurry.

[0080] During the cleaning process, the waste water valve 25 is opened, and the slurry valve 26 is closed. The water in the sampling cup 5 is discharged into the waste water bucket 2 from the lower part of the sampling cup 5 through the slurry suction hose 24, the waste water valve 25, and the waste water discharge hose 28 in sequence.

[0081] Another embodiment of the present application discloses a slurry automatic sampling and detection method, as shown in the following steps S1-S5. Figure 2

[0082] ​Step S1, close the water supply solenoid valve 14, the air supply solenoid valve 15, the two-way three-way solenoid valve (control waste valve) 22 controls the waste valve 25 to be in the closed state, and the two-way three-way solenoid valve (control slurry valve) 23 controls the slurry valve 26 to be in the open state.

[0083] Specifically, as shown in Figure 3 The control water supply solenoid valve 14 and the air supply solenoid valve 15 are in the power-off closed state to prevent the flow of water and gas; the two-way three-way solenoid valve (control waste valve) 22 and the two-way three-way solenoid valve (control slurry valve) 23 receive corresponding control signals to close the waste valve 25 and open the slurry valve 26, respectively, so that the slurry in the slurry barrel 32 can flow through the slurry valve 26.

[0084] Step S2, start the vacuum pump 4 to extract the slurry in the slurry barrel 32 into the sampling cup 5.

[0085] Specifically, the vacuum pump 4 is turned on, and as the vacuum pump 4 sucks, the air in the sampling cup 5 is sucked into the vacuum pump 4 through the air port, the connecting pipe 10 and the vacuum hose 16; at this time, negative pressure is generated in the sampling cup 5, and the slurry 31 in the slurry barrel 32 is extracted into the sampling cup 5 through the slurry filter screen 30, the sampling pipe 29, the open slurry valve 26 and the slurry suction hose 24.

[0086] Step S3, when the preset pressure value of the vacuum pressure switch 11 is reached, stop the vacuum pump 4 and use the measurement assembly to detect the slurry.

[0087] Specifically, as the vacuum pump 4 sucks, the slurry level in the sampling cup 5 rises continuously, immersing the detection probes of the viscometer 9, the hydrometer 12 and the pH meter 6; as the liquid level rises, the float 7 moves upward, and when the suction cup-shaped silica gel sealing cover of the float 7 moves upward to the air port on the cover plate of the sampling cup 5 and is blocked, as the vacuum pump 4 sucks, the negative pressure in the connecting pipe 10 rises, and when the pressure reaches the preset pressure value of the vacuum pressure switch 11, the vacuum pump 4 is turned off; at the same time, the two-way three-way solenoid valve (control slurry valve) 23 receives the signal and closes the slurry valve 26; at this time, the suction stops and the slurry level in the sampling cup 5 stops rising, and the sensors start measuring the physical and chemical properties of the slurry in the sampling cup 5 and record and transmit the measured data.

[0088] Step S4, after the slurry detection is completed, air is injected into the sampling cup 5 through the air port to return the slurry to the slurry barrel 32.

[0089] Specifically, after the slurry testing is completed, the water supply solenoid valve 14 remains in the de-energized and closed state. The two-position three-way solenoid valve (controlling the wastewater valve) 22 receives the corresponding control signal and controls the wastewater valve 25 to be in the closed state. The two-position three-way solenoid valve (controlling the slurry valve) 23 receives the corresponding control signal and controls the slurry valve 26 to be in the open state. The air supply solenoid valve 15 and the filter pressure reducing valve 21 are opened. Compressed air passes through the filter pressure reducing valve 21, the compressed air hose 19, the air supply solenoid valve 15, and the connecting pipe 10, which pushes open the suction cup-shaped silicone sealing cover of the float 7 and moves downward. The compressed air enters the sampling cup 5. Under the action of gas pressure, the slurry in the cup passes through the slurry suction hose 24, the slurry valve 26, the sampling tube 29, and the slurry filter screen 30 at the bottom of the sampling cup 5 and returns to the slurry tank 32.

[0090] Step S5: After all the slurry in the sampling cup 5 has been returned to the slurry tank 32, turn on the water source to clean the sampling and detection device.

[0091] Specifically, such as Figure 4 As shown, after the slurry return operation is completed, the device is cleaned. The two-position three-way solenoid valve (controlling the wastewater valve) 22 receives the corresponding control signal and controls the wastewater valve 25 to open. The two-position three-way solenoid valve (controlling the slurry valve) 23 receives the corresponding control signal and controls the slurry valve 26 to close. At the same time, the water supply solenoid valve 14 and the air supply solenoid valve 15 are opened. The water flows through the water pipe 18, through the inlet of the water spray ring 8, and through the outlet of the water spray ring 8 to spray and clean the sampling cup 5.

[0092] The wastewater after cleaning is discharged into the wastewater tank 2 through the lower part of the sampling cup 5, the suction hose 24, the wastewater valve 25, and the wastewater discharge hose 28.

[0093] Furthermore, when the viscosity of the slurry exceeds the preset standard value in the slurry test results, the water source is turned on to replenish the slurry in the slurry tank 32; when the amount of water replenished as displayed by the flow meter 17 reaches the preset value, the water replenishment is stopped.

[0094] Specifically, when the viscosity of the slurry detected by the viscometer 9 exceeds the standard value, the amount of water to be added is calculated based on the current viscosity value and the amount of slurry in the slurry tank 32.

[0095] The water supply electromagnetic valve 14 is opened, the gas supply electromagnetic valve 15 is closed, the two-position three-way electromagnetic valve (controlling the waste water valve) 22 and the two-position three-way electromagnetic valve (controlling the slurry valve) 23 receive corresponding control signals, respectively close the waste water valve 25 and open the slurry valve 26, the water flows through the flow meter 17, passes through the water pipe 18, enters the sampling cup 5 from the water inlet of the water spraying ring 8, and flows into the slurry barrel 32 from the water outlet of the water spraying ring 8, and the water flows from the lower part of the sampling cup 5, the slurry suction hose 24, the slurry valve 26, the sampling pipe 29 and the slurry filter screen 30, when the water flow measured by the flow meter 17 reaches the water supplementing amount, the water supply electromagnetic valve 14 is closed, and the water supplementing process is completed.

[0096] In summary, the slurry automatic sampling and detecting device and method has the following beneficial effects:

[0097] 1、The device can automatically collect the slurry sample in the sampling cup, measure through the sensor, return the slurry to the slurry barrel after detection, clean the whole system, and automatically supplement the slurry when the viscosity of the slurry is out of standard, so as to reduce the labor intensity and measurement error caused by manual sampling and measuring.

[0098] 2、During the detection of the slurry, the sensor is installed in the sampling cup instead of being directly immersed in the slurry barrel, so that the abrasion of the sensor probe by the slurry is avoided, the service life of the sensor is prolonged, and the system and the measuring sensor are effectively protected.

[0099] 3、The device detects the slurry by pumping, avoids the immersion of the sensor in the slurry barrel, ensures the maximum utilization of the internal space of the slurry barrel, reduces the risk of contamination or caking of the slurry, and ensures the stability and consistency of the slurry quality.

[0100] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any change or replacement within the technical range disclosed by the present application can be easily thought by those skilled in the art, and should be covered in the protection scope of the present application.

Claims

1. A slurry automatic sampling and detecting device, characterized in that, The device comprises: a pressure control component, a measurement component, a water control component and a sampling cup (5); wherein the pressure control component is used to control the pressure in the sampling cup (5) during sampling and sample returning to extract and return slurry; the sampling cup (5) comprises an upper cover plate, a middle section and a lower cone, the middle section is made of transparent acrylic material; during sampling / sample returning, the slurry (31) in the slurry tank (32) is sucked into and discharged from the sampling cup (5) through the sampling tube (29), the slurry valve (26) and the slurry suction hose (24) from the lower part of the sampling cup (5); during water replenishment, the water in the sampling cup (5) enters the slurry tank (32) through the slurry suction hose (24), the slurry valve (26) and the sampling tube (29) from the lower part of the sampling cup (5) in sequence; during cleaning, the water in the sampling cup (5) is discharged into the wastewater tank (2) through the slurry suction hose (24), the wastewater valve (25) and the wastewater discharge hose (28) from the lower part of the sampling cup (5) in sequence; the measurement component is used to detect the slurry in the sampling cup (5) and comprises a pH meter (6), a viscometer (9) and a specific gravity meter (12); wherein the pH meter (6) is obliquely installed on the side wall of the middle section of the sampling cup (5); the viscometer (9) is installed on the upper cover plate of the sampling cup (5); and the specific gravity meter (12) is installed on the side wall of the middle section of the sampling cup (5); the water control component is used to control the water path to clean the device after detection and to quantitatively replenish the slurry based on the slurry detection result; wherein the water control component comprises a water spraying ring (8) fixed on the upper cover plate of the sampling cup (5), the water inlet is connected with a water source, and the water outlet is located in the sampling cup (5), the water outlet is composed of a plurality of small holes uniformly distributed around the circular ring, and the water spraying cleaning is in the form of umbrella-shaped jet flow.

2. The apparatus of claim 1, wherein The pressure control component comprises a vacuum pump (4), a vacuum pressure switch (11) and a vacuum gauge (13).

3. The apparatus of claim 2, wherein The upper part of the sampling cup is provided with an air port; the vacuum pressure switch (11) and the vacuum gauge (13) are arranged on the pipeline between the vacuum pump (4) and the air port.

4. The apparatus of claim 3, wherein The pressure control component further comprises a float (7) installed on the upper cover plate of the sampling cup (5), and the air port can be closed or opened with the movement of the float (7).

5. The apparatus of claim 1, wherein The water control component further comprises a flowmeter (17) connected with the water inlet of the water spraying ring (8) through a pipeline.

6. The apparatus of claim 5, wherein The lower cone of the sampling cup (5) is connected with the slurry tank (32) and the wastewater tank (2) respectively.

7. A method for automatic sampling and detection of slurry, characterized by, The slurry automatic sampling and detection device according to any one of claims 1-6 comprises the following steps: start the vacuum pump (4) to extract the slurry in the slurry tank (32) into the sampling cup (5); stop the vacuum pump (4) when the preset pressure value of the vacuum pressure switch (11) is reached, and use the measurement component to detect the slurry; after the slurry detection is completed, inject air into the sampling cup (5) through the air port to return the slurry to the slurry tank (32); When the slurry in the sampling cup (5) is returned to the slurry tank (32) completely, the water source is opened to clean the sampling detection device.

8. The method of claim 7, wherein, When the viscosity of the slurry in the slurry detection result exceeds the preset standard value, the water source is opened to supplement the slurry in the slurry tank (32); when the amount of water supplement displayed by the flow meter (17) reaches the preset value, the water supplement is stopped.

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