Automatic sampling and detecting device and method for slurry

Abstract

The invention relates to an automatic sampling and detecting device and method for slurry, belongs to the technical field of casting, and solves the operation error of manual sampling and measurement in the prior art. And when the sensor is used for measurement, the sensor occupies a lot of space, and a hardened tumor on a probe rod of the sensor scratches a barrel wall, so that the abrasion of a sensor probe caused by dipping of a mold shell and slurry is influenced. The device comprises a pressure control assembly, a measuring assembly, a water control assembly and a sampling cup, the pressure control assembly is used for controlling the pressure in the sampling cup in the sampling and sample returning processes so as to extract and return the slurry; the measuring assembly is used for detecting the slurry in the sampling cup; and the water control assembly is used for controlling a water path to clean the detected device and quantitatively replenishing water to the slurry based on the slurry detection result.

Description

Technical Field

[0001] The present invention relates to the field of casting technology, and in particular to a slurry automatic sampling and detection device and method. Background Art

[0002] As a near-net material molding method, investment casting has become the preferred method for casting molding in all walks of life. However, in the shell making process, the quality of the slurry directly affects the quality of the shell, and the key indicators affecting the quality of the slurry are viscosity, specific gravity, temperature, pH value, etc. Therefore, it is very important to regularly detect various physical and chemical numerical indicators of the slurry, which directly affects the yield of the shell. The existing slurry detection methods 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 and pour it into a standard measuring cup, and measure the viscosity of the slurry by the time it takes for the slurry to flow out of the measuring cup. The pH value of the slurry is measured with pH test paper. The specific gravity of the slurry is measured by weighing a certain volume of slurry. This method not only frequently consumes manpower and repeats work, but also causes deviations in the measurement results due to human operation errors.

[0004] The sensor online measurement method is to install the viscometer, thermometer, hydrometer, pH meter, etc. directly in the slurry barrel for real-time measurement, and transmit the measurement data to the host computer in real time, eliminating the interference of human factors in manual sampling and measurement. However, in actual application, this method occupies a lot of space when fixed around the slurry barrel due to the relatively large geometric dimensions of each sensor, thereby reducing the effective diameter of the slurry barrel, and also reducing the size of the immersion mold shell. At the same time, since the slurry is easy to surge when it encounters protrusions when rotating in the slurry barrel, a large plate nodule will form on the probe rod of each sensor, which will not only scratch the barrel wall but also affect the immersion mold shell. Since the slurry is mainly composed of a mixture of zirconium powder, corundum powder, mullite powder and silica sol, it has great abrasiveness to the sensor probe immersed in it during movement, which can easily damage the sensor and make it ineffective. Summary of the invention

[0005] In view of the above analysis, the embodiments of the present invention aim to provide an automatic slurry sampling and detection device and method, so as to solve the problems of frequent labor intensity and operation errors of personnel in the existing manual sampling and measurement method, as well as the problem that the sensor in the online measurement method occupies a large amount of space, the nodules on the sensor probe rod scratch the barrel wall, and the wear of the sensor probe by the immersion mold shell and slurry is affected.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions:

[0007] The present invention provides a slurry automatic sampling and detection device, the device comprising: a pressure control component, a measuring component, a water control component and a sampling cup (5); wherein:

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

[0009] The measuring component is used to detect the slurry in the sampling cup (5);

[0010] The water control component is used to control the water path to clean the detected device and to quantitatively replenish the slurry based on the slurry detection results.

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

[0012] Furthermore, a gas port is provided on the upper portion of the sampling cup; the vacuum pressure switch (11) and the vacuum gauge (13) are provided on the pipeline between the vacuum pump (4) and the gas port.

[0013] Furthermore, the pressure control component also includes a float (7), and the float (7) is 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] Furthermore, the water control component comprises a water spray ring (8) fixed on the upper cover plate of the sampling cup (5), a water inlet connected to a water source, and a water outlet located inside the sampling cup (5).

[0015] Furthermore, the water control component also includes a flow meter (17), which is connected to the water inlet of the water spray ring (8) through a pipeline.

[0016] Furthermore, the bottom of the lower vertebral body of the sampling cup (5) is connected to the slurry bucket (32) and the waste water bucket (2) respectively.

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

[0018] On the other hand, the present invention provides a method for automatic slurry sampling and detection, using any of the automatic slurry sampling and detection devices described above, comprising the following steps:

[0019] Start the vacuum pump (4) to draw the slurry in the slurry bucket (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 slurry is tested using a measuring assembly;

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

[0022] When all the slurry in the sampling cup (5) is returned to the slurry barrel (32), the water source is turned on to clean the sampling and detection device.

[0023] Furthermore, when the viscosity of the slurry in the slurry detection result exceeds a preset standard value, the water source is turned on to replenish the slurry in the slurry barrel (32); when the replenishment amount displayed by the flow meter (17) reaches a preset value, the replenishment is stopped.

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

[0025] 1. The device of the present invention can automatically collect slurry samples in the sampling cup, measure them through the sensor, and automatically return the slurry to the slurry barrel after detection, and clean the entire system. At the same time, when the viscosity of the slurry exceeds the standard, the device can automatically replenish the slurry with water, which can reduce the labor intensity and operation errors of the personnel in the manual sampling and measurement method. The measurement errors caused by manual operation.

[0026] 2. During the process of detecting slurry, the device of the present invention avoids the problem of wear of the sensor probe by the slurry by installing the sensor in the sampling cup instead of directly immersing it in the slurry barrel, thereby extending the service life of the sensor and effectively protecting the system and the measuring sensor.

[0027] 3. The device of the present invention extracts slurry for detection, avoiding the immersion of the sensor in the slurry barrel, thereby ensuring the maximum utilization of the internal space of the slurry barrel and reducing the risk of slurry being contaminated or forming lumps, thereby ensuring the stability and consistency of the slurry quality.

[0028] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0030] Figure 1 This is a schematic diagram of the structure of an automatic slurry sampling and detection device in an embodiment of the present invention;

[0031] Figure 2It is a schematic diagram of a flow chart of a slurry automatic sampling and detection method in an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the valve status of slurry extraction detection in an embodiment of the present invention;

[0033] Figure 4 Schematic diagram of valve status during cleaning of the device in an embodiment of the present invention.

[0034] Reference numerals:

[0035] 1- bracket; 2- wastewater bucket; 3- electric control box; 4- vacuum pump; 5- sampling cup; 6- pH meter; 7- float; 8- water spray ring; 9- viscometer; 10- connecting pipe; 11- vacuum pressure switch; 12- hydrometer; 13- vacuum gauge; 14- water supply solenoid valve; 15- air supply solenoid 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 solenoid valve (to control wastewater valve); 23- two-position three-way solenoid valve (to control 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; 31- slurry; 32- slurry bucket. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0037] A specific embodiment of the present invention discloses a slurry automatic sampling and detection device, such as Figure 1 As shown, the slurry automatic sampling and detection device includes: a pressure control component, a measuring component, a water control component and a sampling cup 5.

[0038] Specifically, the slurry automatic sampling and detection device automatically draws a certain amount of slurry into a customized sampling cup through vacuum negative pressure to measure physical and chemical parameters. After the measurement is completed, the slurry is automatically returned and then automatically cleaned. When the viscosity exceeds the standard, the device can also calculate the amount of water to be added according to the current slurry viscosity and automatically add water to the slurry in a quantitative manner.

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

[0040] An electric control box 3 is placed on the bracket 1, and the electrical components in the box are used for the control of the entire system and the collection, storage and transmission of sensor data.

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

[0042] The pressure control assembly includes a vacuum pump 4, a vacuum pressure switch 11 and a vacuum gauge 13; a gas port is provided on the upper portion of the sampling cup 5; the vacuum pressure switch 11 and the vacuum gauge 13 are provided 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-backflow type, with a voltage of 220V, a power of 370W, and a pumping rate of 7.2m / s. 3 / h, the ultimate pressure is 0.2Pa.

[0044] The pipeline is a connecting pipe 10, one end of which is fixed on the air port of the upper cover plate of the sampling cup 5 and communicated with the sampling cup 5, and the other end is connected to the air supply solenoid valve 15, which is used to draw gas outward when sampling and slurry extraction, and to inject compressed air into the inside when the slurry is returned and cleaned. Although the connecting pipe 10 is used for gas transportation, since there will be water vapor in the sampling cup 5, 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 air supply solenoid valve 15 is installed in a threaded manner at one end of the connecting pipe 10 away from the air port of the sampling cup 5. Like the connecting pipe 10, it is made of corrosion-resistant and durable materials. In this embodiment, the air supply solenoid valve 15 can be made of 304 stainless steel, with a diameter of DN10 and a power supply of 24V.

[0046] A vacuum pressure switch 11 and a vacuum gauge 13 are provided 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 through threads and is connected to the vacuum pump 4 through a vacuum hose 16. The vacuum gauge 13 can display the vacuum index in the connecting pipe 10. The operator can monitor the operation of the device according to the degree of the vacuum gauge 13.

[0048] Furthermore, the pressure control assembly further comprises a float 7 mounted 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 .

[0049] Specifically, the float 7 includes a cylindrical float ball, a suction cup type silicone sealing cover and a guide rod. The float 7 is fixed to the upper cover plate of the sampling cup 5 through a suspension rod and a nut, and is connected to the connecting pipe 10 to control the gas in and out of the sampling cup 5. In this embodiment, the diameter of the float ball of the float 7 can be 50 mm, and the material is 304 stainless steel.

[0050] During the sampling process, the vacuum pump 4 is started, and the gas in the sampling cup 5 is discharged through the connecting pipe 10, the vacuum hose 16 and the vacuum pump 4. By forming a negative pressure in the sampling cup 5, the slurry is sucked from the bottom of the sampling cup 5 and as the liquid level rises, the float 7 is lifted up. When the suction cup-type silicone sealing cover on the float 7 moves to the gas port on the upper cover plate of the sampling cup 5 and blocks the gas port, the negative pressure in the connecting pipe 10 increases. 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 still.

[0051] The pressure control assembly also includes a filter pressure reducing valve 21, which is connected to the air source for providing compressed air, and is connected to the air supply solenoid valve 15 via a compressed air hose 19; in this embodiment, the filter pressure reducing valve 21 is of model AirTAC-GFR20008F1; the compressed air hose is made of PU, has a diameter of φ8, and is of model AirTAC-US98A080050BU.

[0052] During the return slurry process, the vacuum pump 4 is not turned on, the filter pressure reducing valve 21 and the air supply solenoid valve 15 are turned on, and the compressed air passes through the connecting pipe 10 to push open the suction cup type silicone sealing cover of the float 7 and move it downward, and 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 positive pressure.

[0053] Furthermore, the measuring component is used to detect the slurry in the sampling cup 5 .

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

[0055] Specifically, the pH meter 6 and the hydrometer 12 are respectively installed on the side walls 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 screwed and installed obliquely on the side wall of the middle section of the sampling cup 5, with a vertical angle of 75° with the sampling cup 5, which is convenient for the slurry to flow downward and easy to clean. In this embodiment, the pH meter 6 is of model InPro 4281i, made of 316, and has an insertion depth of 120 mm.

[0057] The viscometer 9 is vertically fixed on the upper cover of the sampling cup 5 by screw connection. It should be noted that the viscometer 9 also has a temperature measurement function, and measures the viscosity and temperature of the slurry at the same time. In this embodiment, the viscometer 9 adopts a vibration measurement method, the probe rod is made of 316L material and is smooth and regular for easy cleaning, the model is HYND-100, the measurement range is 0-10000cp, 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 using a flange connection. In this embodiment, the hydrometer 12 adopts a tuning fork measurement method. The probe rod is made of 316L material and is smooth and regular for easy cleaning. The model is DKYCMDJ-TX, DN50 flange, insertion depth of 150mm, material is 316L, power supply is 24V, output is 4-20mA. It should be noted that the flange connecting the hydrometer 12 and the sampling cup 5 is made of transparent acrylic material.

[0059] During use, the slurry in the sampling cup 5 continues to rise, and the detection probes of the viscometer 9, the hydrometer 12 and the pH meter 6 are completely immersed. When the vacuum pump 4 stops working and the liquid level stabilizes, the sensors of the measuring assembly measure the physical and chemical properties of the slurry in the sampling cup 5, and record and transmit the measured data.

[0060] Furthermore, the water control component is used to control the water circuit to clean the detected device and to quantitatively replenish the slurry based on the slurry detection results.

[0061] Furthermore, the water control component includes a water spray ring 8 fixed on the upper cover plate of the sampling cup 5 , a water inlet connected to a water source, and a water outlet located inside the sampling cup 5 .

[0062] Specifically, the water spray ring 8 is a circular ring structure, the water inlet of which is connected to the water source through the water pipe 18, and the water outlet is composed of a plurality of small holes evenly distributed around the ring. The small holes are arranged in three rows on the cross section of the ring, and are respectively at angles of 0°, 45° and 135° to the horizontal line. When spraying water for cleaning, the umbrella-shaped jet flow of the small holes is refracted by collision, rebound and can form a covering cleaning for each position of the entire sampling cup. In this embodiment, the material of the water spray ring 8 is 304 stainless steel.

[0063] The other end of the water pipe 18 is connected to the water supply ball valve 20, and a water supply solenoid valve 14 is installed in the middle for connecting to a water source to control the opening and closing of the water flow; in this embodiment, the water pipe 18 is made of 304 stainless steel.

[0064] The water supply solenoid valve 14 is installed on the water pipe 18 in a screw connection manner. In this embodiment, the water supply solenoid valve 14 is made of 304 stainless steel, has a diameter of DN15, and has a power supply of 24V.

[0065] The 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 water supply ball valve 20 is made of 304 stainless steel and has a diameter of DN15.

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

[0067] When cleaning and replenishing the device, the ball valve 20, the water supply solenoid valve 14, the filter pressure reducing valve 21, and the air supply solenoid valve 15 are opened at the same time, and the sampling cup 5 is sprayed and cleaned through the water spray port 8; compressed air enters the sampling cup 5 from the air port through the connecting pipe 10, and the waste water after cleaning or the clean water that needs to be replenished is discharged from the sampling cup 5.

[0068] Furthermore, the bottom of the lower vertebral body of the sampling cup 5 is connected to the slurry bucket 32 ​​and the waste water bucket 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 a tubular transparent acrylic material for easy observation of the internal slurry. The upper cover plate and the lower cone of the sampling cup 5 are sealed and connected to the middle section by an O-ring through bolts. 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 and discharge of the slurry.

[0070] The bottom of the lower vertebral body of the sampling cup 5 is connected to one end of the slurry suction hose 24 through a throat clamp for conveying 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 tee, and the connection method is to use a spiral steel wire tube; in this embodiment, the material of the slurry suction hose 24 is polyurethane, and the inner diameter is φ20mm.

[0071] One end of the wastewater valve 25 is connected to the slurry suction hose 24 through a tee, and the other end is connected to the wastewater bucket 2 through a wastewater discharge hose 28; the wastewater valve 25 is also connected to the two-position three-way solenoid valve (controlling the wastewater valve) 22 through a 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 tube made of polyurethane and has an inner diameter of φ20mm.

[0072] The two-position three-way solenoid valve (wastewater control valve) 22 is fixed on the valve seat and is used to receive a control signal to control the opening or closing of the wastewater valve 25; in this embodiment, the model of the two-position three-way solenoid valve (wastewater control valve) 22 is AirTAC-4V21008B.

[0073] The waste water bucket 2 is placed in the middle of the bracket 1. It is made of polyethylene and has a capacity 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 to the slurry suction hose 24 through a three-way connection, and the other end is connected to the sampling tube 29. The slurry valve 26 is also connected to the two-position three-way solenoid valve (control slurry valve) 23 through a compressed air hose 19; in this embodiment, the model of the slurry valve 26 is VMC25-120 DN25.

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

[0076] The other end of the slurry valve 26 away from the slurry suction hose 24 is connected to a sampling tube 29, and the sampling tube 29 is clamped and fixed on the slurry barrel 32 by a sampling tube fixing seat 27. The lower end of the sampling tube 29 is connected to a slurry filter 30. Through the sampling tube 29, slurry 31 is drawn from the slurry barrel 32 and sucked into the sampling cup 5 through the slurry suction hose 24 for detection; in this example, the sampling tube 29 is made of 304 stainless steel with an outer diameter of φ27mm and a wall thickness of 3.5mm; the slurry filter 30 is fixed to the lower end of the sampling tube 29 by screwing, and the slurry filter 30 is made of 304 stainless steel with a mesh diameter of 3mm.

[0077] It should be noted that the sampling tube fixing seat 27 is fixedly connected to the edge of the slurry barrel 32 by bolts.

[0078] During the sampling / returning process, the slurry valve 26 is opened and the wastewater valve 25 is closed. At this time, the slurry 31 in the slurry barrel 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 replenishment process, the slurry valve 26 is opened, the wastewater valve 25 is closed, and the water in the sampling cup 5 flows 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 into the slurry barrel 32, thereby replenishing the slurry.

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

[0081] Another embodiment of the present invention discloses a slurry automatic sampling and detection method, such as Figure 2 As shown, it includes the following steps S1 to S5:

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

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

[0084] Step S2 , starting the vacuum pump 4 to draw 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 draws air, the air in the sampling cup 5 is drawn 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 drawn into the sampling cup 5 from the lower end of the sampling cup 5 through the slurry filter 30, the sampling tube 29, the opened 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, the vacuum pump 4 is stopped and the slurry is tested using a measuring component.

[0087] Specifically, with the suction of the vacuum pump 4, the slurry level in the sampling cup 5 continues to rise, and the detection probes of the viscometer 9, the hydrometer 12 and the pH meter 6 are all immersed; the float 7 moves up with the rising liquid surface, and when the suction cup-shaped silicone sealing cover of the float 7 moves upward to the air port on the upper cover plate of the sampling cup 5 and is sealed, with the suction of the vacuum pump 4, 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-position three-way solenoid valve (controlling the slurry valve) 23 receives the signal and closes the slurry valve 26; at this time, the suction stops, the slurry level in the sampling cup 5 stops rising, and each sensor starts to measure the physical and chemical properties of the slurry in the sampling cup 5 and records and transmits 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, when the slurry detection is completed, the water supply solenoid valve 14 is controlled to be still in the power-off closed state, the two-position three-way solenoid valve (controlling the wastewater valve) 22 receives the corresponding control signal, and the wastewater valve 25 is controlled to be in the closed state. The two-position three-way solenoid valve (controlling the slurry valve) 23 receives the corresponding control signal, and the slurry valve 26 is controlled to be in the open state. The air supply solenoid valve 15 and the filter pressure reducing valve 21 are opened, and the compressed air is passed through the filter pressure reducing valve 21, through the compressed air hose 19, the air supply solenoid valve 15, and the connecting pipe 10 to push open the suction cup-shaped silicone sealing cover of the float 7 and move downward. The compressed air enters the sampling cup 5, and the slurry in the cup is returned to the slurry barrel 32 under the action of gas pressure through the slurry suction hose 24, the slurry valve 26, the sampling tube 29, and the slurry filter 30 at the bottom of the sampling cup 5.

[0090] Step S5: After all the slurry in the sampling cup 5 is returned to the slurry barrel 32, the water source is turned on to clean the sampling and detection device.

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

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

[0093] Furthermore, when the viscosity of the slurry in the slurry detection result exceeds the preset standard value, the water source is turned on to replenish the slurry in the slurry barrel 32; when the water replenishment amount 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 replenished is calculated based on the current viscosity value and the amount of slurry in the slurry barrel 32 .

[0095] The water supply solenoid valve 14 is opened, the air supply solenoid valve 15 is closed, the two-position three-way solenoid valve (controlling the wastewater valve) 22 and the two-position three-way solenoid valve (controlling the slurry valve) 23 receive corresponding control signals, close the wastewater valve 25 and open the slurry valve 26 respectively, and the water flows through the flow meter 17, through the water pipe 18, through the water inlet of the water spray ring 8, and flows into the sampling cup 5 from the water outlet of the water spray ring 8. The water flows from the lower part of the sampling cup 5, the slurry suction hose 24, the slurry valve 26, the sampling tube 29, and the slurry filter 30 to the slurry barrel 32. When the water flow measured by the flow meter 17 reaches the water replenishment amount, the water supply solenoid valve 14 is closed, and the water replenishment process ends.

[0096] In summary, the automatic slurry sampling and detection device and method according to the embodiment of the present invention have the following beneficial effects:

[0097] 1. The device of the present invention can automatically collect slurry samples in the sampling cup, measure them through the sensor, and automatically return the slurry to the slurry barrel after detection, and clean the entire system. At the same time, when the viscosity of the slurry exceeds the standard, the device can automatically replenish the slurry with water, which can reduce the labor intensity and operation errors of the personnel in the manual sampling and measurement method. The measurement errors caused by manual operation.

[0098] 2. During the process of detecting slurry, the device of the present invention avoids the problem of wear of the sensor probe by the slurry by installing the sensor in the sampling cup instead of directly immersing it in the slurry barrel, thereby extending the service life of the sensor and effectively protecting the system and the measuring sensor.

[0099] 3. The device of the present invention extracts slurry for detection, avoiding the immersion of the sensor in the slurry barrel, thereby ensuring the maximum utilization of the internal space of the slurry barrel and reducing the risk of slurry being contaminated or forming lumps, thereby ensuring the stability and consistency of the slurry quality.

[0100] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A slurry automatic sampling and detection device, characterized in that: The device includes: A pressure control component, a measuring component, a water control component and a sampling cup (5); wherein, The pressure control assembly is used to control the pressure in the sampling cup (5) during the sampling and returning process to extract and return the slurry; The measuring component is used to detect the slurry in the sampling cup (5); The water control component is used to control the water path to clean the detected device and to quantitatively replenish the slurry based on the slurry detection results.

2. The device according to claim 1, characterized in that: The pressure control component comprises a vacuum pump (4), a vacuum pressure switch (11) and a vacuum gauge (13).

3. The device according to claim 2, characterized in that: An air port is provided on the upper portion of the sampling cup; the vacuum pressure switch (11) and the vacuum gauge (13) are provided on the pipeline between the vacuum pump (4) and the air port.

4. The device according to claim 3, characterized in that: The pressure control component further comprises a float (7), wherein the float (7) is mounted on the upper cover plate of the sampling cup (5), and the air port can be closed or opened as the float (7) moves.

5. The device according to claim 1, characterized in that: The water control component comprises a water spray ring (8) fixed on the upper cover plate of the sampling cup (5), a water inlet connected to a water source, and a water outlet located inside the sampling cup (5).

6. The device according to claim 5, characterized in that: The water control component also includes a flow meter (17) connected to the water inlet of the water spray ring (8) through a pipeline.

7. The device according to claim 6, characterized in that: The bottom of the lower vertebral body of the sampling cup (5) is connected to the slurry bucket (32) and the waste water bucket (2) respectively.

8. The device according to claim 1, characterized in that: The measuring assembly comprises a pH meter (6), a viscometer (9) and a specific gravity meter (12), all of which are installed on the sampling cup (5).

9. A slurry automatic sampling and detection method, characterized in that: The slurry automatic sampling and detection device according to any one of claims 1 to 8 comprises the following steps: Start the vacuum pump (4) to draw the slurry in the slurry barrel (32) into the sampling cup (5); When the preset pressure value of the vacuum pressure switch (11) is reached, the vacuum pump (4) is stopped and the slurry is tested using a measuring assembly; After the slurry is tested, air is injected into the sampling cup (5) through the air port to return the slurry to the slurry barrel (32); When all the slurry in the sampling cup (5) is returned to the slurry barrel (32), the water source is turned on to clean the sampling and detection device.

10. The method according to claim 9, characterized in that: When the viscosity of the slurry in the slurry detection result exceeds the preset standard value, the water source is turned on to replenish the slurry in the slurry barrel (32); when the water replenishment amount displayed by the flow meter (17) reaches the preset value, the water replenishment is stopped.

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