Fully automatic sand content measuring instrument and testing method

Abstract

The present application relates to the technical fields of sand content measuring instrument and testing method, and discloses a full-automatic sand content measuring instrument and testing method.The full-automatic sand content measuring instrument comprises a pulp cup, a sand separation main body pipe, a measuring cylinder and a fixing frame.The pulp cup is fixed on the upper right part of the fixing frame, the measuring cylinder is fixed on the lower left part of the fixing frame, and the sand separation main body pipe is arranged on the fixing frame between the pulp cup and the measuring cylinder.The full-automatic sand content measuring instrument is assisted with the sand content into the pulp, measurement and instrument cleaning operation through the cone plug plugging mechanism combined with the upper chamber opening and closing mechanism, and the mud into the pulp, water into the pulp, measurement and cleaning operation are linked and controlled through the control part, so that the sand content measurement and instrument cleaning are automated, the full-automatic drilling fluid sand content performance repeated testing is realized, and the use of the full-automatic sand content measuring instrument solves the problems of high labor intensity and high personnel cost of the existing drilling fluid sand content method, and has great popularization and application value.

Description

Technical Field

[0001] This invention relates to the technical field of sand content measuring instruments and testing methods, and is a fully automatic sand content measuring instrument and testing method. Background Technology

[0002] Sand content in drilling fluid refers to the percentage of sand particles larger than 74 micrometers in the total volume of the drilling fluid that cannot pass through a 200-mesh sieve. In field applications, this value should be as low as possible, generally controlled below 0.5%. Excessive sand content can cause the following problems in the drilling process: it increases the density of the drilling fluid, which is detrimental to improving the drilling rate; it makes the mud cake soft, leading to increased filtration loss, which is detrimental to wellbore stability and affects cementing quality; and a high sand content in the mud cake increases the friction coefficient of the mud cake, which can easily cause differential pressure sticking, increasing wear on the drill bit and drilling tools and shortening their service life.

[0003] Traditional methods for measuring the sand content of drilling fluids involve using instruments such as sand content analyzers. These methods are cumbersome and repetitive, increasing the workload and costs for testing personnel. Furthermore, manual readings are prone to errors and cannot meet the requirements for collecting large amounts of drilling fluid performance data. This hinders the development of automation, informatization, and large-scale big data applications in the drilling fluid technical service industry. Summary of the Invention

[0004] This invention provides a fully automatic sand content measuring instrument and testing method, overcoming the shortcomings of the prior art. It utilizes a cone plug sealing mechanism combined with an upper chamber opening and closing mechanism to assist in sand content feeding, measurement, and instrument cleaning operations. Furthermore, the control unit coordinates and controls the mud feeding, water feeding, measurement, and cleaning operations, thus automating sand content measurement and instrument cleaning.

[0005] One of the technical solutions of this invention is achieved through the following measures: A fully automatic sand content measuring instrument includes a slurry cup, a sand-distributing main tube, a measuring cylinder, and a fixing frame. The slurry cup is fixed to the upper right part of the fixing frame, the measuring cylinder is fixed to the lower left part of the fixing frame, and the sand-distributing main tube is set on the fixing frame between the slurry cup and the measuring cylinder. A slurry cup flushing pipe is fixedly connected to the slurry cup. A filter screen that divides the interior of the sand-distributing main tube into an upper chamber and a lower chamber is horizontally fixed inside the sand-distributing main tube. A gap is provided between the left end of the filter screen and the left end of the sand-distributing main tube. The drain port at the bottom of the slurry cup is located above the filter screen. Inside the right inlet of the main sand-separating pipe, a cone plug sealing mechanism capable of opening and closing the bottom drain of the slurry cup is installed at the bottom drain of the slurry cup. An upper chamber opening and closing mechanism capable of opening and closing the left end of the upper chamber is installed at the upper left end of the filter screen. At least one upper flushing pipe is fixedly connected to the left end of the main sand-separating pipe corresponding to the upper chamber opening and closing mechanism. At least one lower flushing pipe is fixedly connected to the main sand-separating pipe corresponding to the lower chamber. A vibration motor is installed on the main sand-separating pipe. The left outlet of the main sand-separating pipe is connected to the upper inlet of the measuring cylinder. A valve is fixedly installed at the lower outlet of the measuring cylinder.

[0006] The following are further optimizations and / or improvements to one of the above-mentioned technical solutions:

[0007] The above also includes a control unit. The valves are electric valves. Liquid level detection modules are installed in the slurry cup and measuring cylinder respectively. The control unit is electrically connected to the control end of the cone plug sealing mechanism, the control end of the upper chamber opening and closing mechanism, the liquid level detection module, and the electric valve.

[0008] The aforementioned cone plug sealing mechanism includes a cone plug and a vertical moving mechanism that drives the cone plug to move up and down. The cone plug is cone-shaped with the small end facing upwards. The cone plug is installed at the bottom drain port of the slurry cup. The vertical moving mechanism includes a lead screw stepper motor, a guide rail, and a sliding sleeve that can slide up and down the guide rail. The lead screw stepper motor is fixed on a fixed frame on the left side of the sand separating main tube, and the guide rail is fixed on a fixed frame on the right side of the lead screw stepper motor. A nut is installed on the outside of the lead screw of the lead screw stepper motor. The left side of the nut is fixedly connected to the right end of the cone plug through a connecting part, and the right side of the nut is fixedly connected to the sliding sleeve.

[0009] The aforementioned sand separating main pipe and filter screen are both inclined to the lower left and upper right.

[0010] The aforementioned upper chamber opening and closing mechanism includes a digital servo motor and a gate. The digital servo motor is fixedly installed on the upper left side of the sand-dividing main pipe, and the gate is installed on the left end of the upper chamber via a rotating shaft. The power output end of the digital servo motor is connected to the rotating shaft.

[0011] The aforementioned gate is a mesh gate with a mesh size of 200 mesh.

[0012] A waste liquid box is installed below the discharge end of the graduated cylinder.

[0013] The aforementioned control unit uses a microcontroller, which is electrically connected to the control terminals of the lead screw stepper motor, the digital servo motor, the liquid level detection module, and the electric valve.

[0014] The left outlet of the main sand separating tube is connected to the upper inlet of the measuring cylinder through a buffer tube. The left outlet of the main sand separating tube is tapered, wider at the top and narrower at the bottom, and the buffer tube is funnel-shaped. A slurry cap is fixed on the top of the slurry cup, and the slurry cup flushing pipe is set on the slurry cap.

[0015] The second technical solution of the present invention is achieved through the following measures: a testing method for a fully automatic sand content measuring instrument, comprising the following steps: Step 1, sand collection: injecting the required mud into the slurry cup through the slurry cup flushing pipe, and determining whether the required amount of mud has been injected through the liquid level detection module; when the mud in the slurry cup reaches the required testing amount, starting the lead screw stepper motor, the cone plug moves downward under the drive of the lead screw stepper motor, the bottom drain port of the slurry cup is opened, and the mud flows into the sand separating main tube through the bottom drain port of the slurry cup. As the mud is injected into the sand separating main pipe through the filter screen, the vibration motor above the sand separating main pipe begins to vibrate. At the same time, clean water is injected through the upper and lower flushing pipes, allowing the mud to pass smoothly through the filter screen. The filtered sand is concentrated on the filter screen on the right side of the gate in the upper chamber. The cleaning liquid formed by washing the mud flows into the measuring cylinder. The electric valve at the lower end of the measuring cylinder opens, allowing the cleaning liquid in the measuring cylinder to flow into the waste liquid box and finally be discharged from the drain outlet of the waste liquid box. After the mud is washed clean, the cone plug moves upward under the drive of the screw stepper motor, closing the drain outlet at the bottom of the slurry cup and proceeding to the next step.

[0016] Step 2, Sand Drop and Measurement: Close the electric valve at the bottom of the measuring cylinder and close the drain end at the bottom of the measuring cylinder. Control the rotating shaft to rotate clockwise by a certain angle to open the gate to the left. After the gate opens, the filtered sand falls into the measuring cylinder. Inject the required amount of clean water into the slurry cup, open the drain port at the bottom of the slurry cup, and simultaneously inject clean water through the upper and lower flushing pipes to flush the sand on the right side of the gate and the sand on the filter screen into the measuring cylinder. Measure the liquid level in the measuring cylinder and compare it with the liquid level of the injected equal amount of clean water. The difference between the two volumes is the volume of the sand, and the sand content result is obtained.

[0017] The following are further optimizations and / or improvements to the second technical solution of the above invention:

[0018] After the above measurement operations are completed, cleaning and drying operations are performed. Cleaning operation: Open the electric valve at the bottom of the measuring cylinder and open the drain end at the bottom of the measuring cylinder. The sand and clean water flow into the waste liquid box together. At this time, the drain port at the bottom of the slurry cup, the gate, and the drain end at the bottom of the measuring cylinder are all in the normally open state. Inject clean water into the slurry cup flushing pipe, the upper flushing pipe, and the lower flushing pipe. The clean water flows through the slurry cup, the main sand separating pipe, the measuring cylinder, and finally flows into the waste liquid box, and is finally discharged from the drain port of the waste liquid box.

[0019] Drying operation: After cleaning, hot air is injected into the water flushing pipe, upper flushing pipe and lower flushing pipe of the slurry cup. The hot air flows through the slurry cup, the main sand separating pipe and the measuring cylinder to dry each working part. After drying, the electric valve at the bottom of the measuring cylinder, the drain port at the bottom of the slurry cup and the gate are closed.

[0020] This fully automatic sand content measuring instrument uses a cone plug sealing mechanism combined with an upper chamber opening and closing mechanism to assist in the sand content injection, measurement, and instrument cleaning operations. The control unit controls the mud injection, water injection, measurement, and cleaning operations in a coordinated manner, automating sand content measurement and instrument cleaning. This enables fully automatic and repeatable testing of drilling fluid sand content performance. The use of this fully automatic sand content measuring instrument solves the problems of high labor intensity and high personnel costs associated with existing drilling fluid sand content methods, and has significant potential for widespread application. Attached Figure Description

[0021] Appendix Figure 1 This is a schematic diagram of the main structure of the fully automatic sand content measuring instrument of the present invention.

[0022] Appendix Figure 2 This is a schematic diagram of the main view of the fully automatic sand content measuring instrument of the present invention, showing a partial cross-sectional view.

[0023] The codes in the attached diagram are as follows: 1 is the slurry cup, 2 is the main sand-distributing pipe, 3 is the measuring cylinder, 4 is the fixing frame, 5 is the slurry cup flushing pipe, 6 is the upper chamber, 7 is the lower chamber, 8 is the filter screen, 9 is the upper flushing pipe, 10 is the lower flushing pipe, 11 is the vibration motor, 12 is the valve, 13 is the cone plug, 14 is the lead screw stepper motor, 15 is the guide rail, 16 is the sliding sleeve, 17 is the nut, 18 is the connecting part, 19 is the digital servo motor, 20 is the gate, 21 is the buffer fitting, 22 is the waste liquid box, and 23 is the slurry cover. Detailed Implementation

[0024] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0025] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0026] The digital servo 19 is a servo with a known existing structure.

[0027] The present invention will be further described below with reference to embodiments:

[0028] Example 1: As shown in the attached document Figures 1 to 2As shown, this fully automatic sand content measuring instrument includes a slurry cup 1, a sand-distributing main tube 2, a measuring cylinder 3, and a fixing frame 4. The slurry cup 1 is fixed to the upper right part of the fixing frame 4, and the measuring cylinder 3 is fixed to the lower left part of the fixing frame 4. The sand-distributing main tube 2 is set on the fixing frame 4 between the slurry cup 1 and the measuring cylinder 3. A slurry cup flushing pipe 5 is fixedly connected to the slurry cup 1. A filter screen 8, which divides the interior of the sand-distributing main tube 2 into an upper chamber 6 and a lower chamber 7, is horizontally fixed inside the sand-distributing main tube 2. The left end of the filter screen 8 is spaced from the left end of the sand-distributing main tube 2. The drain port at the bottom of the slurry cup 1 is located above the filter screen 8 on the sand-distributing main tube 2. Inside the right inlet end, a cone plug sealing mechanism capable of opening and closing the bottom drain port of the slurry cup 1 is provided at the bottom drain port of the slurry cup 1. An upper chamber opening and closing mechanism capable of opening and closing the left end of the upper chamber 6 is provided at the upper left end of the filter screen 8. At least one upper flushing pipe 9 is fixedly connected to the left end of the sand separating main pipe 2 corresponding to the left of the upper chamber opening and closing mechanism. At least one lower flushing pipe 10 is fixedly connected to the sand separating main pipe 2 corresponding to the lower chamber 7. A vibration motor 11 is provided on the sand separating main pipe 2. The left outlet end of the sand separating main pipe 2 is connected to the upper inlet end of the measuring cylinder 3. A valve 12 is fixedly installed at the lower outlet end of the measuring cylinder 3.

[0029] The slurry feeding operation is controlled by the cone plug sealing mechanism. The sand separated in the slurry is intercepted on the filter screen 8 by the upper chamber opening and closing mechanism. Then, by opening the upper chamber opening and closing mechanism, the sand is flushed into the metering cylinder 3 to measure the sand content. After the sand content measurement is completed, the cone plug sealing mechanism and the upper chamber opening and closing mechanism are used to assist in the cleaning operation of the entire measuring instrument.

[0030] The spacing between the left end of the filter screen 8 and the left end of the sand separating main tube 2 is designed to facilitate the opening and closing of the upper chamber opening and closing mechanism.

[0031] The vibration motor 11 can vibrate the main pipe of the sand separator, which facilitates the separation of mud and sand.

[0032] The mesh size of filter screen 8 is 200 mesh, in accordance with the requirements for sand content testing.

[0033] The following are further optimizations and / or improvements to the above-mentioned fully automatic sand content measuring instrument:

[0034] As needed, a control unit is also included. Valve 12 is an electric valve. Liquid level detection modules are respectively installed in the slurry cup 1 and the measuring cylinder 3. The control unit is electrically connected to the control end of the cone plug sealing mechanism, the control end of the upper chamber opening and closing mechanism, the liquid level detection module, and the electric valve.

[0035] The control unit coordinates and controls the mud feeding, water feeding, measurement, and cleaning operations, automating sand content measurement and instrument cleaning. The liquid level detection module can use a liquid level electrode or a liquid level sensor.

[0036] As attached Figure 2As shown, the cone plug sealing mechanism includes a cone plug 13 and a vertical moving mechanism that drives the cone plug 13 to move up and down. The cone plug 13 is cone-shaped with the small end facing up. The cone plug 13 is installed at the bottom drain port of the slurry cup 1. The vertical moving mechanism includes a lead screw stepper motor 14, a guide rail 15, and a sliding sleeve 16 that can slide up and down on the guide rail 15. The lead screw stepper motor 14 is fixed on the fixing frame 4 on the left side of the sand separating main tube 2, and the guide rail 15 is fixed on the fixing frame 4 on the right side of the lead screw stepper motor 14. A nut 17 is installed on the outside of the lead screw of the lead screw stepper motor 14. The left side of the nut 17 is fixedly connected to the right end of the cone plug 13 through the connecting part 18, and the right side of the nut 17 is fixedly connected to the sliding sleeve 16.

[0037] Start the lead screw stepper motor 14. The nut 17 moves up and down on the lead screw of the lead screw stepper motor 14, which drives the sliding sleeve 16 to move up and down on the guide rail 15. At the same time, it drives the cone plug 13 to move up and down. The cone plug 13 moves upward to the bottom drain port of the slurry cup 1, closing the bottom drain port of the slurry cup 1. The cone plug 13 moves downward to open the bottom drain port of the slurry cup 1.

[0038] As attached Figures 1 to 2 As shown, both the main sand-separating pipe 2 and the filter screen 8 are inclined to the lower left and upper right.

[0039] The inclined sand separating main pipe 2 and filter screen 8 facilitate the filtration and separation of mud, and also help to flush the trapped and separated sand to the left side of the filter screen 8 during the filtration process. The inclination angle can be less than 30 degrees.

[0040] As attached Figure 2 As shown, the upper chamber opening and closing mechanism includes a digital servo motor 19 and a gate 20. The digital servo motor 19 is fixedly installed on the upper left of the sand-dividing main pipe 2, and the gate 20 is installed on the left end of the upper chamber 6 through a rotating shaft. The power output end of the digital servo motor 19 is connected to the rotating shaft.

[0041] Start the digital servo motor 19, and control the gate 20 to open the left side of the upper chamber 6 of the sand-distributing main pipe 2 by controlling the rotation direction of the power output end of the digital servo motor 19.

[0042] As required, the gate 20 adopts a mesh gate with a mesh size of 200 mesh.

[0043] As attached Figures 1 to 2 As shown, a waste liquid box 22 is provided below the drain end of the measuring cylinder 3.

[0044] As required, the control unit adopts a microcontroller, which is electrically connected to the control terminal of the lead screw stepper motor 14, the control terminal of the digital servo motor 19, the liquid level detection module, and the electric valve.

[0045] As attached Figures 1 to 2As shown, the left outlet of the main sand separating pipe 2 is connected to the upper inlet of the measuring cylinder 3 through a buffer pipe 21. The left outlet of the main sand separating pipe 2 is tapered, wider at the top and narrower at the bottom, and the buffer pipe 21 is funnel-shaped. A slurry cover 23 is fixed on the top of the slurry cup 1, and the slurry cup flushing pipe 5 is set on the slurry cover 23.

[0046] Example 2: As shown in the attached document Figures 1 to 2 As shown, the testing method of this fully automatic sand content measuring instrument includes the following steps: Step 1, sand collection: Inject the required amount of mud (100ml) into the mud cup 1 through the water flushing pipe 5, and determine whether the 100ml level has been reached through the liquid level detection module (liquid level electrode); When the mud in the mud cup 1 reaches 100ml, start the lead screw stepper motor 14, and the cone plug 13 moves downward under the drive of the lead screw stepper motor 14, the bottom drain port of the mud cup 1 is opened, and the mud flows into the sand separating main body pipe 2 through the bottom drain port of the mud cup 1. In order to allow the mud to pass smoothly through the filter screen 8, the mud is injected into the sand separating main body. At the same time as the main sand-separating pipe 2, the vibration motor 11 above the main sand-separating pipe 2 starts to vibrate, and clean water is injected through the upper flushing pipe 9 and the lower flushing pipe 10, so that the mud can pass smoothly through the filter screen 8. The filtered sand is concentrated on the filter screen 8 on the right side of the gate 20 of the upper chamber 6. The cleaning liquid formed by washing the mud flows into the measuring cylinder 3. The electric valve at the lower end of the measuring cylinder 3 opens, so that the cleaning liquid in the measuring cylinder 3 flows into the waste liquid box 22 and is finally discharged from the drain outlet of the waste liquid box 22. After about two minutes, the mud is washed clean, and the cone plug 13 moves upward under the drive of the screw stepper motor 14, closing the drain outlet at the bottom of the slurry cup 1, and proceeding to the next step.

[0047] Step 2, Sand Drop and Measurement: Close the electric valve at the lower end of measuring cylinder 3 and close the drain end at the lower end of measuring cylinder 3. The digital servo motor 19 controls the rotating shaft to rotate clockwise by a certain angle, so that the gate 20 opens to the left. After the gate 20 opens, the filtered sand falls into measuring cylinder 3. Inject 100 ml of clean water into the slurry cup 1, open the drain port at the bottom of the slurry cup 1, and simultaneously inject clean water through the upper flushing pipe 9 and the lower flushing pipe 10 to flush the sand on the right side of the gate 20 and the sand on the filter screen 8 into measuring cylinder 3. Measure the liquid level in measuring cylinder 3 (by liquid level sensor) and compare it with the liquid level of the injected equal amount of clean water. The difference in volume between the two is the volume of the sand, and the sand content result is obtained.

[0048] After the above measurement operations are completed, cleaning and drying operations are performed. Cleaning operation: Open the electric valve at the lower end of measuring cylinder 3 and open the drain end at the lower end of measuring cylinder 3. The sand and clean water flow into the waste liquid box 22 together. At this time, the drain port at the bottom of the slurry cup 1, the gate 20 and the drain end at the lower end of measuring cylinder 3 are all in the normally open state. Inject clean water into the slurry cup flushing pipe 5, the upper flushing pipe 9 and the lower flushing pipe 10 to clean each working part for 1 minute. The clean water flows through the slurry cup 1, the sand separating main pipe 2, the measuring cylinder 3 and finally flows into the waste liquid box 22 and is finally discharged from the drain port of the waste liquid box 22.

[0049] Drying Operation: After cleaning, inject hot air into the slurry cup flushing pipe 5, upper flushing pipe 9, and lower flushing pipe 10 to dry each working part for 1 minute. The hot air flows through the slurry cup 1, the sand separating main pipe 2, and the measuring cylinder 3. Some of the hot air will flow into the waste liquid box 22, drying the entire working component. After drying, close the electric valve at the lower end of the measuring cylinder 3, the drain port at the bottom of the slurry cup 1, and the gate 20 to prepare for the next test.

[0050] As can be seen from the test method, when this automatic sand content measuring instrument is used to measure the sand content of mud, it uses a cone plug sealing mechanism combined with an upper chamber opening and closing mechanism to assist in the sand content feeding, measurement and instrument cleaning operations. The control unit controls the mud feeding, water feeding, measurement and cleaning operations in a coordinated manner, so as to automate the sand content measurement and instrument cleaning.

[0051] Water and hot air can also be injected through the control unit. Hot air can be air above 25°C.

[0052] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A fully automatic sand content measuring instrument, characterized in that... The system includes a slurry cup, a sand-separating main tube, a measuring cylinder, and a mounting frame. The slurry cup is fixed to the upper right part of the mounting frame, and the measuring cylinder is fixed to the lower left part. The sand-separating main tube is mounted on the mounting frame between the slurry cup and the measuring cylinder. A slurry cup flushing pipe is fixed to the slurry cup. A filter screen, dividing the interior of the sand-separating main tube into an upper and lower chamber, is horizontally fixed inside the sand-separating main tube. A gap is provided between the left end of the filter screen and the left end of the sand-separating main tube. The drain outlet at the bottom of the slurry cup is located inside the right inlet end of the sand-separating main tube above the filter screen. A cone plug sealing mechanism capable of opening and closing the bottom drain of the slurry cup is provided at the drain outlet. An upper chamber opening and closing mechanism capable of opening and closing the left end of the upper chamber is provided at the upper left end of the filter screen. At least one upper flushing pipe is fixedly connected to the left end of the sand separating main pipe corresponding to the upper chamber opening and closing mechanism. At least one lower flushing pipe is fixedly connected to the sand separating main pipe corresponding to the lower chamber. A vibration motor is provided on the sand separating main pipe. The left outlet end of the sand separating main pipe is connected to the upper inlet end of the measuring cylinder. A valve is fixedly installed at the lower outlet end of the measuring cylinder. It also includes a control unit, with electric valves, and liquid level detection modules installed in the slurry cup and measuring cylinder respectively. The control unit is electrically connected to the control end of the cone plug sealing mechanism, the control end of the upper chamber opening and closing mechanism, the liquid level detection module, and the electric valve. The cone plug sealing mechanism includes a cone plug and a vertical moving mechanism that drives the cone plug to move up and down. The cone plug is cone-shaped with the small end facing upwards and is installed at the bottom drain port of the slurry cup. The vertical moving mechanism includes a lead screw stepper motor, a guide rail, and a sliding sleeve that can slide up and down the guide rail. The lead screw stepper motor is fixed on a fixed frame on the left side of the sand separating main tube, and the guide rail is fixed on a fixed frame on the right side of the lead screw stepper motor. A nut is installed on the outside of the lead screw of the lead screw stepper motor. The left side of the nut is fixedly connected to the right end of the cone plug through a connecting part, and the right side of the nut is fixedly connected to the sliding sleeve. The control unit uses a microcontroller, which is electrically connected to the control terminal of the lead screw stepper motor, the control terminal of the digital servo motor, the liquid level detection module, and the electric valve. Both the main sand-dividing pipe and the filter screen are inclined to the lower left and upper right. The upper chamber opening and closing mechanism includes a digital servo motor and a gate. The digital servo motor is fixedly installed on the upper left side of the sand-dividing main pipe, and the gate is installed on the left end of the upper chamber through a rotating shaft. The power output end of the digital servo motor is connected to the rotating shaft.

2. The fully automatic sand content measuring instrument according to claim 1, characterized in that... The gate is a mesh gate with a mesh size of 200 mesh.

3. The fully automatic sand content measuring instrument according to claim 1 or 2, characterized in that... A waste liquid box is provided below the discharge end of the measuring cylinder; or / and, the left outlet end of the main sand separating tube is connected to the upper inlet end of the measuring cylinder through a buffer pipe, the left outlet end of the main sand separating tube is tapered with a wider top and a narrower bottom, and the buffer pipe is funnel-shaped; or / and, a slurry cover is fixed on the top of the slurry cup, and the slurry cup flushing pipe is set on the slurry cover.

4. A testing method for a fully automatic sand content measuring instrument according to claim 3, characterized in that... The method includes the following steps: Step 1, sand collection: Inject the required mud into the slurry cup through the slurry cup flushing pipe. The liquid level detection module determines whether the required amount of mud has been injected. When the mud in the slurry cup reaches the required amount for testing, start the lead screw stepper motor. The cone plug moves downward under the drive of the lead screw stepper motor, and the bottom drain port of the slurry cup is opened. The mud flows into the sand separating main tube through the bottom drain port of the slurry cup. In order to allow the mud to pass through the filter screen smoothly, the vibration motor above the sand separating main tube starts to vibrate at the same time as the mud is injected into the sand separating main tube. At the same time, clean water is injected through the upper flushing pipe and the lower flushing pipe to allow the mud to pass through the filter screen smoothly. The filtered sand is concentrated on the filter screen on the right side of the gate in the upper chamber. The cleaning liquid formed by washing the mud flows into the measuring cylinder. The electric valve at the lower end of the measuring cylinder is opened, allowing the cleaning liquid in the measuring cylinder to flow into the waste liquid box and finally be discharged from the drain port of the waste liquid box. After the mud is washed clean, the cone plug moves upward under the drive of the lead screw stepper motor, closes the bottom drain port of the slurry cup, and proceeds to the next step. Step 2, Sand Drop and Measurement: Close the electric valve at the bottom of the measuring cylinder and close the drain end at the bottom of the measuring cylinder. Control the rotating shaft to rotate clockwise by a certain angle to open the gate to the left. After the gate opens, the filtered sand falls into the measuring cylinder. Inject the required amount of clean water into the slurry cup, open the drain port at the bottom of the slurry cup, and simultaneously inject clean water through the upper and lower flushing pipes to flush the sand on the right side of the gate and the sand on the filter screen into the measuring cylinder. Measure the liquid level in the measuring cylinder and compare it with the liquid level of the injected equal amount of clean water. The difference between the two volumes is the volume of the sand, and the sand content result is obtained.

5. The test method according to claim 4, characterized in that... After the measurement operation is completed, cleaning and drying operations are performed. Cleaning operation: Open the electric valve at the bottom of the measuring cylinder and open the drain end at the bottom of the measuring cylinder. The sand and clean water flow into the waste liquid box together. At this time, the drain port at the bottom of the slurry cup, the gate, and the drain end at the bottom of the measuring cylinder are all in the normally open state. Inject clean water into the slurry cup flushing pipe, the upper flushing pipe, and the lower flushing pipe. The clean water flows through the slurry cup, the sand separating main pipe, the measuring cylinder, and finally flows into the waste liquid box, and is finally discharged from the drain port of the waste liquid box. Drying operation: After cleaning, hot air is injected into the slurry cup flushing pipe, upper flushing pipe and lower flushing pipe. The hot air flows through the slurry cup, the main sand separating pipe and the measuring cylinder to dry each working part. After drying, the electric valve at the bottom of the measuring cylinder, the drain port at the bottom of the slurry cup and the gate are closed.

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