Automatic cleaning device and method for cement truck density meter

Abstract

The present invention provides an automatic cleaning device and method for a cement truck density meter, comprising a liquid supply pipeline, a centrifugal pump, a tee, a density meter mounting seat, a signal acquisition system, a control system and a cleaning tank, wherein the liquid supply pipeline is connected to the centrifugal pump inlet, a tee is provided between the centrifugal pump and the density meter mounting seat, and a discharge pipeline is connected to the third end of the tee; the density meter mounting seat is connected to the cleaning tank; the density meter mounting seat is electrically connected to the signal acquisition system, and the signal acquisition system is electrically connected to the control system. The automatic cleaning device for a cement truck density meter provided by the present invention solves the problem of cement adhering to the inside of the density meter, improves the measurement accuracy of the density meter, and prolongs the service life of the equipment. The present invention uses cleaning liquid for automatic liquid supply, automatic circulation during the cleaning process, and automatic detection of the cleaning progress. The present invention is used for automatic cleaning of the density meter, making the operation safer and more efficient, and greatly saving on-site manpower.

Description

Technical Field

[0001] The invention belongs to the field of petroleum equipment, and in particular relates to an automatic cleaning device and method for a cement truck density meter. Background Art

[0002] Due to its own structural characteristics and application characteristics, petroleum machinery equipment is suitable for intelligent development, which is also an inevitable requirement for the development of oilfield production. As the core component of oilfield equipment, the density meter plays an irreplaceable role in controlling the density and flow of materials entering the well. How to ensure that the density meter always accurately measures the density is the direction of efforts to improve the quality of oil and gas field operations. With the extension of the use time of the equipment, the performance degradation of each component is inevitable. As an electronic component with strict requirements on the measurement environment and extremely high measurement accuracy, ensuring its own cleanliness is a key measure to improve measurement accuracy and extend its life. According to the previous investigation and survey of the use of density meters of some cementing equipment, there are problems such as drift in the measurement data of density meters of some equipment, which has a certain degree of impact on the quality of operations. Summary of the invention

[0003] In order to overcome the problem of drift in the measurement data of some equipment densitometers in existing operations, the present invention provides an automatic cleaning device and method for cement truck densitometers. The automatic cleaning device for cement truck densitometers provided by the present invention solves the problem of cement adhering inside the densitometer, improves the measurement accuracy of the densitometer, and prolongs the service life of the equipment.

[0004] The technical solution adopted by the present invention is:

[0005] An automatic cleaning device for a density meter on a cement truck comprises an upper liquid pipeline, a centrifugal pump, a tee, a density meter mounting seat, a signal acquisition system, a control system and a cleaning tank, wherein the upper liquid pipeline is connected to the inlet of the centrifugal pump, a tee is arranged between the centrifugal pump and the density meter mounting seat, and a discharge pipeline is connected to the third end of the tee; the density meter mounting seat is connected to the cleaning tank; the density meter mounting seat is electrically connected to the signal acquisition system, and the centrifugal pump and the signal acquisition system are electrically connected to the control system respectively.

[0006] The centrifugal pump is connected to the cleaning tank through a suction pipeline.

[0007] The centrifugal pump is connected to the tee through a circulation pipeline.

[0008] The density meter mounting seat is connected to the tee through a second circulation pipeline.

[0009] The density meter mounting seat is connected to the cleaning tank via a circulating pipeline.

[0010] A densitometer is installed in the densitometer mounting seat, and the densitometer is connected to the signal acquisition system.

[0011] The upper liquid pipeline is provided with a water pump, which is electrically connected to the control system.

[0012] A cement truck densitometer automatic cleaning method, the specific steps are:

[0013] Step 1: Start: Install the densitometer on the densitometer mounting base, turn on the control system to start the power supply, and collect the empty pipe density of the densitometer;

[0014] Step 2, cleaning: the cleaning liquid is sucked from the upper liquid pipeline by a water pump, and then enters the cleaning tank through the suction pipeline, and then the cleaning liquid is circulated along the pipeline to clean the density meter by a centrifugal pump. After cleaning, the cleaned cleaning liquid is discharged through the discharge pipeline;

[0015] Step 3, cleaning again: suck clean water into the cleaning tank, circulate the clean water through the density meter on the density meter mounting base through the centrifugal pump, clean the density meter again, and after cleaning, discharge the clean water through the discharge pipeline;

[0016] Step 4, measurement: turn on the control system to measure the empty tube density of the densitometer cleaned in step 3, and output the empty tube density of the densitometer after cleaning.

[0017] The beneficial effects of the present invention are:

[0018] The present invention realizes an operation method for automatically cleaning a density meter, creates a new mode for cleaning the density meter, and effectively saves cleaning labor.

[0019] The invention designs an automatic cleaning liquid filling pipeline, which can realize automatic cleaning liquid filling through a water pump.

[0020] The present invention designs a discharge pipeline, and the cleaning liquid is recovered after cleaning is completed, which will not pollute the environment.

[0021] The present invention is equipped with a signal acquisition system, which can monitor the cleaning process of the density meter in real time.

[0022] The following is a further description with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the automatic cleaning device for a density meter provided by the present invention.

[0024] The accompanying drawings in the figure are marked as follows:

[0025] 1. Liquid supply pipeline; 2. Centrifugal pump; 3. Circulation pipeline 1; 4. Tee; 5. Circulation manifold 2; 6. Densitometer mounting base; 7. Signal acquisition system; 8. Control system; 9. Circulation pipeline 3; 10. Discharge pipeline; 11. Cleaning tank; 12. Suction pipeline. DETAILED DESCRIPTION

[0026] Embodiment 1:

[0027] In order to overcome the problem of drift in the measurement data of some equipment densitometers in existing operations, the present invention provides an automatic cleaning device for cement truck densitometers. The automatic cleaning device for cement truck densitometers provided by the present invention solves the problem of cement adhering inside the densitometer, improves the measurement accuracy of the densitometer, and prolongs the service life of the equipment.

[0028] An automatic cleaning device for a density meter on a cement truck comprises an upper liquid pipeline 1, a centrifugal pump 2, a tee 4, a density meter mounting seat 6, a signal acquisition system 7, a control system 8 and a cleaning tank 11, wherein the upper liquid pipeline 1 is connected to the inlet of the centrifugal pump 2, a tee 4 is arranged between the centrifugal pump 2 and the density meter mounting seat 6, and a discharge pipeline 10 is connected to the third end of the tee 4; the density meter mounting seat 6 is connected to the cleaning tank 11; the density meter mounting seat 6 is electrically connected to the signal acquisition system 7, and the centrifugal pump 2 and the signal acquisition system 7 are electrically connected to the control system 8 respectively.

[0029] When the density meter needs to be cleaned, the density meter is installed on the density mounting seat 6 of the present invention, and then the information is collected to the control system 8 through the signal acquisition system 7 for real-time monitoring; then the cleaning liquid is added to the cleaning tank 11, and the cleaning liquid is circulated along the connected pipeline to clean the density meter through the centrifugal pump 2. After cleaning, it is washed again with clean water. After cleaning, the empty tube density of the cleaned density meter is measured, and the empty tube density of the density meter after cleaning is output. If the output density range is within the set density value safety range, the control system will not alarm and clean it. Otherwise, the alarm module in the control system will sound an alarm, which means that the cleaning is not clean, and it needs to be washed again or subsequent work needs to be done.

[0030] The cleaning liquid in the present invention is an existing cleaning liquid for electronic components, which will not be described in detail in the present invention. The present invention realizes an operation method for automatic cleaning of a density meter, creates a new mode for cleaning a density meter, and effectively saves cleaning labor. The present invention designs an automatic liquid filling pipeline for the cleaning liquid, which can realize automatic liquid filling of the cleaning liquid through a water pump. The discharge pipeline in the present invention discharges and recycles the cleaning liquid after the cleaning is completed. The present invention is equipped with a signal acquisition system, which can monitor the cleaning progress of the density meter in real time.

[0031] The present invention is used for automatic cleaning of a density meter, making the operation safer and more efficient, and greatly saving on-site manpower. The present invention uses automatic liquid loading of cleaning liquid, automatic circulation of the cleaning process, and automatic detection of the cleaning progress through a signal acquisition system 7.

[0032] Embodiment 2:

[0033] Based on Example 1, in this embodiment, the centrifugal pump 2 is connected to the cleaning tank 11 through the suction pipeline 12.

[0034] The centrifugal pump 2 is connected to the tee 4 via a circulation pipeline 3.

[0035] The density meter mounting seat 6 is connected to the tee 4 via a circulation pipeline 2 5 .

[0036] The density meter mounting seat 6 is connected to the cleaning tank 11 through a circulation pipeline 3 9.

[0037] The densitometer mounting seat 6 is provided with a densitometer, and the densitometer is connected to the signal acquisition system 7 .

[0038] The upper liquid pipeline 1 is provided with a water pump, and the water pump is electrically connected to the control system 8 .

[0039] The present invention is equipped with 200kg of cleaning liquid and 50 meters of cable. The equipment involved in the present invention can adapt to operation under humid, rainy and windy weather conditions, and the centrifugal pump skid can adapt to the operating environment temperature of -20℃~+60℃. In the present invention, the cleaning tank 11 and the centrifugal pump 2 are arranged on the skid frame, which is an integral structure with a heavy-load lifting lug on the top for easy lifting and transportation; a forklift hole is designed on the bottom skid for easy insertion and transportation, and the cleaning tank 11 is located above one side of the centrifugal pump 2.

[0040] The total volume of the cleaning tank 11 in the present invention is ≥600L, and it is used as a circulating liquid storage tank to facilitate the recycling of liquid. When the present invention is in operation, the motor directly drives the centrifugal pump 2 to rotate, realizing the circulation operation of the cleaning liquid and circulating cleaning of the density meter.

[0041] Maximum discharge flow of centrifugal pump 2: 5.0m³ / min (clean water)

[0042] Maximum discharge pressure: 0.25 MPa (clean water).

[0043] Centrifugal pump motor

[0044] Model: M2JA 200L4A, 4 poles, horizontal installation

[0045] Power:22kW Voltage:380VA

[0046] Maximum speed: 1470rpm

[0047] Protection level: IP65

[0048] Cooling method: IC411

[0049] Number of centrifugal pumps: 1

[0050] Model: 6×5×11

[0051] Flow rate: 5.0 m3 / min (clean water)

[0052] Head: 0.25 MPa (clean water)

[0053] Rated speed: 1470 RPM

[0054] Sealing type: mechanical seal.

[0055] The control system 8 in the present invention is an electric control box, and the control system 8 displays the density of the density meter before and after cleaning. The control system 8 is provided with an alarm system, which is a prior art and will not be further described in the present invention. The density alarm range is set in advance, and when the density meter is cleaned and tested, an alarm is issued when the density value exceeds the set density value range.

[0056] The electric control box is equipped with a secondary instrument for the density meter, a PLC, a touch screen for collecting and displaying the density and flow of the density meter, and an alarm module for the cleaning test of the equipment density meter. At the same time, a test print appears to display the density before and after cleaning. The density alarm range is set in advance. When the density meter is cleaned and tested, an alarm is issued when the density value exceeds the set density value range.

[0057] Detection method: After the operation is completed, the density meter should be circulated and cleaned first. After cleaning, clean water should be used for circulation (through the switch of the butterfly valve, only the density meter manifold is opened) to fill the density meter with clean water, and the cleanliness of the density meter should be tested.

[0058] At this time, if the density value is greater than 1.01g / cm³, it means that the density meter is not cleaned properly and the alarm system will sound an alarm;

[0059] If the density value is ≤1.01g / cm³, it means that the density meter has been cleaned and the alarm system will not alarm.

[0060] Empty pipe test method: After the operation is completed, the density meter is cyclically cleaned. After cleaning, the liquid in the manifold is drained and the cleanliness of the density meter is tested.

[0061] At this time, if the density value is greater than 1.01 g / cm³, it means that the density meter has not been cleaned and the alarm system will alarm; if the density value is ≤1.01 g / cm³, it means that the density meter has been cleaned and the alarm system will not alarm.

[0062] The invention is used for automatic cleaning of a density meter, making the operation safer and more efficient, and greatly saving on-site manpower. The invention uses automatic liquid loading of the cleaning liquid, automatic circulation of the cleaning process, and automatic detection of the cleaning progress.

[0063] Embodiment 3:

[0064] Based on Examples 1 and 2, in this embodiment, a cement truck densitometer automatic cleaning method is provided, and the specific steps are as follows:

[0065] Step 1, start: install the densitometer on the densitometer mounting seat 6, turn on the control system 8 to start the power supply, and collect the empty pipe density of the densitometer;

[0066] Step 2, cleaning: the centrifugal pump 2 works to suck the cleaning liquid from the upper liquid pipeline 1, and then enters the cleaning tank 11 through the suction pipeline 12, and then the cleaning liquid is circulated along the pipeline by the centrifugal pump 2 to clean the density meter. After cleaning, the cleaned cleaning liquid is discharged through the discharge pipeline 10;

[0067] Step 3, cleaning again: suck clean water into the cleaning tank 12, circulate the clean water through the density meter on the density meter mounting seat 6 through the centrifugal pump 2, and clean the density meter again. After cleaning, discharge the clean water through the discharge pipeline 10;

[0068] Step 4, measurement: turn on the control system 8 to measure the empty tube density of the densitometer cleaned in step 3, and output the empty tube density of the densitometer after cleaning.

[0069] The working process of the present invention is:

[0070] Startup: install the densitometer on the densitometer mounting base 6, connect the densitometer to the signal acquisition system 7, connect the signal acquisition system 7 to the control system 8, turn on the control system, start the power supply, and collect the empty pipe density of the densitometer.

[0071] Cleaning: The centrifugal pump 2 is connected to the cleaning tank 11 through the suction pipeline 12 to suck the cleaning liquid into the cleaning tank 11. The centrifugal pump 2 is connected to the tee 4 through the circulation pipeline 1 3. The circulation pipeline 1 3 is connected to the circulation pipeline 2 5 through the tee 4. The circulation pipeline 2 5 is connected to the density meter mounting seat 6. The density meter of the density meter mounting seat 6 is connected to the cleaning tank 11 through the circulation pipeline 3 9. The cleaning liquid is circulated through the density meter by the centrifugal pump 2 to clean the density meter. After cleaning, the cleaning liquid is discharged through the discharge pipeline 10.

[0072] Cleaning again: the centrifugal pump 2 is connected to the cleaning tank 11 through the suction pipeline 12, and the clean water is sucked into the cleaning tank 11 through the water pump. The centrifugal pump 2 is connected to the tee 4 through the circulation pipeline 1 3, and the circulation pipeline 1 3 is connected to the circulation pipeline 2 5 through the tee 4, and the circulation pipeline 2 5 is connected to the density meter mounting seat 6. The density meter of the density meter mounting seat 6 is connected to the cleaning tank 11 through the circulation pipeline 3 9. The clean water is circulated through the density meter by the centrifugal pump 2, and the density meter is cleaned again. After cleaning, the clean water is discharged through the discharge pipeline 10.

[0073] Measurement: The density meter is connected to the signal acquisition system 7, and the signal acquisition system 7 is connected to the control system 8. The control system is turned on, the power is started, the empty tube density of the density meter is measured, and the empty tube density of the density meter after cleaning is output.

[0074] The present invention uses automatic liquid loading of cleaning liquid, automatic circulation of the cleaning process, and automatic detection of the cleaning progress. The present invention is used for automatic cleaning of the density meter, making the operation safer and more efficient, and greatly saving on-site manpower. At present, there is no such complete technology at home and abroad, and it is the first time that the automatic cleaning operation of the density meter is realized at home and abroad.

[0075] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. Any design that is the same or similar to the present invention belongs to the protection scope of the present invention. The device structure and its module system method that are not described in detail in this embodiment are all well-known technologies and commonly used methods in the industry, and will not be described one by one here.

Claims

1. An automatic cleaning device for a cement truck densitometer, characterized in that: The invention comprises an upper liquid pipeline (1), a centrifugal pump (2), a tee (4), a density meter mounting seat (6), a signal acquisition system (7), a control system (8) and a cleaning tank (11), wherein the upper liquid pipeline (1) is connected to the inlet of the centrifugal pump (2), a tee (4) is provided between the centrifugal pump (2) and the density meter mounting seat (6), and the third end of the tee (4) is connected to a discharge pipeline (10); the density meter mounting seat (6) is connected to the cleaning tank (11); the density meter mounting seat (6) is electrically connected to the signal acquisition system (7), and the centrifugal pump (2) and the signal acquisition system (7) are electrically connected to the control system (8) respectively; the density meter mounting seat (6) is connected to the tee (4) via a second circulation pipeline (5); the density meter mounting seat (6) is connected to the cleaning tank (11) via a third circulation pipeline (9); a density meter is installed in the density meter mounting seat (6), and the density meter is connected to the signal acquisition system (7).

2. The automatic cleaning device for a cement truck densitometer according to claim 1, characterized in that: The centrifugal pump (2) is connected to the cleaning tank (11) via a suction pipeline (12).

3. The automatic cleaning device for a cement truck densitometer according to claim 1, characterized in that: The centrifugal pump (2) and the tee (4) are connected via a circulation pipeline 1 (3).

4. The automatic cleaning device for a cement truck densitometer according to claim 1, characterized in that: The upper liquid pipeline (1) is provided with a water pump, and the water pump is electrically connected to the control system (8).

5. The automatic cleaning method for a cement truck densitometer according to any one of claims 1 to 4, characterized in that: The specific steps are: Step 1, start: install the densitometer on the densitometer mounting base (6), turn on the control system (8) to start the power supply, and collect the empty pipe density of the densitometer; Step 2, cleaning: the cleaning liquid is sucked from the upper liquid pipeline (1) by a water pump, and then enters the cleaning tank (11) through the suction pipeline (12), and then the cleaning liquid is circulated along the pipeline by the centrifugal pump (2) to clean the density meter. After cleaning, the cleaned cleaning liquid is discharged through the discharge pipeline (10); Step 3, cleaning again: suck clean water into the cleaning tank (11), circulate the clean water through the density meter on the density meter mounting base (6) through the centrifugal pump (2), and clean the density meter again. After cleaning, discharge the clean water through the discharge pipeline (10); Step 4, measurement: Turn on the control system (8) to measure the empty tube density of the densitometer cleaned in step 3, and output the empty tube density of the densitometer after cleaning.

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