CN212296310U - Medicine feeding system for on-site calibration and adjustment of medicine feeding amount - Google Patents
Medicine feeding system for on-site calibration and adjustment of medicine feeding amount Download PDFInfo
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- CN212296310U CN212296310U CN201922104236.0U CN201922104236U CN212296310U CN 212296310 U CN212296310 U CN 212296310U CN 201922104236 U CN201922104236 U CN 201922104236U CN 212296310 U CN212296310 U CN 212296310U
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Abstract
The utility model discloses a medicine adding system for in-situ calibration and adjustment of medicine adding amount, which comprises a drip tank, a pressure leading port, a gas communicating pipe, a liquid level meter, a medicine outlet tee joint, a flowmeter, an adjusting valve, a calibration switch valve and a medicine outlet pipe; the top of the drip tank is provided with a pressure guide port; the bottom of the drip irrigation tank is communicated with one end of the medicine outlet pipe; a calibration switch valve is arranged on the medicine outlet pipe, and the other end of the medicine outlet pipe is communicated with a side interface of the medicine outlet tee; the upper port of the medicine outlet tee is communicated with the bottom port of the liquid level meter; the top interface of the liquid level meter is communicated with one end of a gas communicating pipe, and the other end of the gas communicating pipe is communicated with the top of the drip tank; the lower port of the medicine outlet tee is communicated with the inlet of the flowmeter; and the outlet of the flowmeter is communicated with the regulating valve. The utility model can effectively solve the difficult problems of dosing flow metering, adjustment, control and bias flow of the dosing system, and can save the dosing amount; the method has the advantages of easy implementation, safety, reliability, wide application, easy popularization and the like.
Description
Technical Field
The utility model relates to an oil gas field adds the medicine field, especially relates to a medicine system and method of adjusting the medicine volume of adding in calibration on the spot. Can be applied to oil and gas wells and oil and gas pipelines which need to be added with medicaments.
Background
In order to ensure normal production and operation of oil and gas channels (collectively referred to as oil and gas flow channels) of oil and gas wells, oil and gas pipelines, pipe fittings and instruments and the like, a functional chemical agent (also referred to as a medicament) which is in a liquid state at normal temperature and normal pressure is usually added into the oil and gas flow channels, and the chemical agent is generally referred to as dosing.
When adding medicine, generally, the medicine adding amount (i.e. the medicine adding amount) or the medicine adding flow (i.e. the medicine adding flow) of the medicine needs to be controlled, adjusted and measured.
At present, the dosage or the dosage flow of the medicament is mainly controlled, adjusted and metered by using a metering pump in China, and the method has the following defects:
1. the method can not accurately control, adjust and measure the dosing flow, and only can roughly control, adjust and measure the dosing flow.
As is known in the art: the metering pump controls the stroke length of a plunger by utilizing a cam mechanism so as to control the percentage of rated displacement (or theoretical displacement) of the metering pump, thereby achieving the purpose of controlling the displacement of the metering pump; if the rated displacement of the metering pump is 60 liters/hour, the displacement of the metering pump can be adjusted to 50 percent of the rated displacement by controlling the plunger stroke of the metering pump to be 50 percent of the maximum stroke by utilizing the cam mechanism, so that the displacement of the metering pump is adjusted to 30 liters/hour; because the metering pump does not have a flowmeter, the plunger of the metering pump has leakage, and the leakage is larger and larger along with the continuous abrasion of the sealing function of the plunger and the continuous abrasion of the liquid discharge valve and the liquid inlet valve, so that the dosing flow cannot be accurately controlled, adjusted and metered by the metering pump.
2. The method can not effectively control, adjust and measure the dosing flow of the 1-pump multi-tube dosing system, can not solve the problem of the dosing flow bias of the 1-pump multi-tube dosing system, and can not meet the dosing flow control, adjustment and measurement requirements of the dosing systems.
Take Qinghai gas field as an example.
The gas field is applied with a high-pressure gas lift production process, 2-50 high-pressure natural gas injection pipelines are generally arranged on 1 gas distribution valve bank, and 10MPa high-pressure natural gas is respectively distributed into 2-50 gas well casings for gas lift production.
Taking 1 gas distribution valve group with 2 high-pressure natural gas injection pipelines arranged in the gas field as an example, as shown in fig. 1, the process can be briefly described as follows: the gas distribution valve group is provided with a gas injection pipeline 106 and a gas injection pipeline 109, and 10MPa of natural gas is respectively distributed to 2 gas wells; in order to prevent the natural gas from forming hydrate blockage in the gas injection pipeline 106 and the gas injection pipeline 109, 1 metering pump 102 is used for respectively injecting methanol into the gas injection pipeline 106 and the gas injection pipeline 109 to prevent freeze blockage, and the flow of the injected methanol is adjusted, controlled and metered at any time according to the constantly changing gas injection quantity of the gas injection pipeline 106 and the gas injection pipeline 109 and different freeze blockage removal requirements; the process for filling methanol can be further briefly described as follows: sucking 30-60 liters per day (or 1.25-2.5 liters per hour) of methanol into a metering pump 102 through a pump inlet pipeline 101, then distributing 30-60 liters per day (or 1.25-2.5 liters per hour) of methanol to a dosing pipe 105 and a dosing pipe 108 through a manifold 103, controlling and adjusting the methanol filling flow of the dosing pipe 105 through a valve 104 according to the freezing blockage conditions of an air injection pipeline 106 and an air injection pipeline 109, and controlling and adjusting the methanol filling flow of the dosing pipe 108 through a valve 107; therefore, although the dosing system of the gas distribution valve bank can determine that the total flow of methanol in the header pipe 103 is 30-60 liters/day (or 1.25-2.5 liters/hour) through the discharge capacity of the metering pump 102, the respective flow rates of methanol in the dosing pipe 105 and the dosing pipe 108 cannot be determined according to the total flow rate of methanol, so that the flow rates of methanol in the dosing pipe 105 and the dosing pipe 108 cannot be adjusted to the flow rates of methanol required by the anti-freezing and blockage removal of the gas injection pipeline 106 and the gas injection pipeline 109 by using the valve 104 and the valve 107; the production operation condition of the gas distribution valve group shows that: during the winter of 12-3 months, an operator can only control and adjust the methanol flow entering the gas injection pipeline 106 and the gas injection pipeline 109 by adjusting the opening of the valve 104 and the valve 107 by personal feeling, cannot judge and confirm the specific methanol flow values and the bias flow degree in the gas injection pipeline 106 and the gas injection pipeline 109 at all, and cannot adjust and solve the existing methanol bias flow problem, so that 1 gas injection pipeline is frequently frozen and blocked, and the production of a gas well is seriously influenced; therefore, the current 1-pump multi-pipe dosing system cannot meet the production requirements of the Qinghai gas field.
At present, the liquid flow is generally measured by using a flow meter measuring method in China, for example, a gear flow meter is used for measuring instantaneous water flow and accumulated water flow in a water pipe; the method is used for the dosing amount or dosing flow metering of the medicament, and has the following defects:
1. the gear flowmeter has leakage; when the dosing flow is small and the viscosity of the medicament is low, the metering error caused by leakage amount can reach 57 percent, which is hundreds of times of the factory calibration metering error of the gear flowmeter, so that the dosing flow is difficult to be effectively metered, and the actual production requirement cannot be met.
As is known in the art: the viscosity difference of different medicaments is great, for example, the viscosity of ethylene glycol used as a natural gas hydrate inhibitor is several times that of clear water, the viscosity of polyacrylamide aqueous solution and polyvinylpyrrolidone aqueous solution used as the natural gas hydrate inhibitor is several hundred times that of the clear water, but the viscosity of methanol used as the natural gas hydrate inhibitor is lower than that of the clear water; the lower the viscosity of the medicament, the larger the leakage of the gear flowmeter, and the larger the metering error.
As is known in the art: the gear flowmeter is generally calibrated for the metering error by using the calibration device and the clean water shown in fig. 2 when being shipped.
The test shows that: the calibration device and methanol shown in fig. 2 are used for a gear flowmeter calibration test, and the results show that: when the reading of a pressure gauge 202 (with the accuracy of 1.6 grade) is 0.03MPa, the DN15 stop valve 204 is used for adjusting the methanol outflow of the DN15 outlet 206 and keeping the methanol outflow unchanged, if the cumulative flow of the gear flowmeter 203 (with the accuracy of 0.5 grade and the range of 0.3-60L/h) in 10 minutes is 0.2L, the methanol outflow received from the outlet 206 by the glass measuring cylinder 207 is 0.46L, and therefore, the leakage of the gear flowmeter 203 is 1.56L/h; further calculation shows that: when the flow rate of the methanol metered by the gear flowmeter 203 is 1.2 liters/hour, the average flow rate of the methanol obtained by calibration is 2.76 liters/hour; therefore, when the gear flowmeter 203 is used for metering small-flow methanol, the metering error can reach 57 percent, which is 114 times of the factory calibration metering error.
As is known in the art: the national standard requires that the maximum error of the industrial instrument is 4%, and when the existing industrial flowmeter leaves a factory or is calibrated in an authoritative metering mechanism, the maximum allowable value of the metering error is +/-4%; the user uses the industrial flow meter, and the maximum allowable value of the indoor calibrated metering error is plus or minus 4 percent; the chemical adding flow of oil and gas wells and oil and gas pipelines is generally very small, for example, a gas distribution valve group with 2 gas injection pipelines is arranged in a Qinghai gas field, the total methanol adding amount of the 2 gas injection pipelines is 30-60 liters/day (or 1.25-2.5 liters/hour), and the average methanol adding amount of a single gas injection pipeline is only 15-30 liters/day (or 0.625-1.25 liters/hour); therefore, when the error of the flow meter reaches 57%, the real and effective dosing amount (or dosing flow) cannot be obtained according to the flow meter, and the production requirements of oil and gas wells and oil and gas pipelines cannot be met.
2. The leakage of the gear flowmeter belongs to mechanical clearance leakage, and the leakage quantity of the gear flowmeter is necessarily changed along with the change of the pressure difference before and after the flowmeter; due to the complexity, the fluctuation and the contingency of the fluid in the actual production working condition, the front and back pressure difference of the gear flowmeter in the actual production application is different and changes randomly at any time, so the actual leakage quantity is also different and changes randomly at any time; therefore, the metering error of the gear flowmeter calibrated before delivery or under other indoor conditions is greatly different from the metering error of the gear flowmeter in actual production application, so that the dosing flow is difficult to accurately meter, and the actual production requirement cannot be met.
The general knowledge in the field and the fluid mechanics are that: when the geometrical size of the gap is constant, the flow rate of the fluid passing through the gap is changed along with the change of the pressure difference between the front and the back of the gap; the flow resistance of the fluid passing through the small hole with the aperture of 1mm and the large hole with the aperture of 10mm is different; when a fluid passes through a small hole with a diameter of 1mm and a large hole with a diameter of 10mm at the same time, if the flow rate of the fluid passing through the large hole with a diameter of 10mm is changed, the flow rate passing through the small hole with a diameter of 1mm is necessarily changed; therefore, even if the pressure difference between the front and the rear of the gear flowmeter is constant, the leakage of the gear flowmeter is different when the instantaneous flow is 10 liters/hour and 1 liter/hour; that is, even if the differential pressure across the same gear flowmeter is constant, the gear flowmeter will have different leakage amounts when measuring different instantaneous flow rates.
In short, the above-mentioned method for controlling, adjusting and measuring the dosage (or the dosage flow) cannot effectively measure, control and adjust the dosage and the dosage flow when the dosage is small.
SUMMERY OF THE UTILITY MODEL
The utility model provides a "medicament": also called functional chemical agent, sometimes called medicine for short, is liquid at normal temperature and pressure.
The utility model provides a "add medicine": is a general term for adding functional chemical agents. Sometimes it refers to the process of adding liquid chemical agent into oil and gas well and oil and gas pipeline.
The utility model provides a "add dose": refers to the volume or weight of functional chemical added, and sometimes to the dosing flow rate.
The utility model provides a "add medicine flow": sometimes, the dosage is abbreviated, which is the abbreviation of the adding flow of the functional chemical agent, and generally refers to the volume flow of the functional chemical agent.
The utility model aims to solve the first technical problem of providing a dosing system for calibrating and adjusting the dosing amount in situ; the dosing system overcomes the defects of the existing dosing system (or device), can calibrate and adjust the dosing flow (or dosing quantity) on site in the production field, can effectively solve the problems of dosing flow metering, adjustment, control and bias flow of the existing dosing system, can save the dosing quantity, and can meet the dosing requirement required by production; the method has the advantages of easy implementation, safety, reliability, wide application, easy popularization and the like.
The second technical problem to be solved by the utility model is to provide a method for adjusting the dosing amount by the on-site calibration of the dosing system; the method overcomes the defects of dosing flow metering, adjusting and controlling of the existing dosing system (or device), can effectively solve the problems of dosing metering, adjusting, controlling and bias flow existing in the dosing system, can save dosing amount, and can meet the dosing requirement required by production; the method has the advantages of easy implementation, safety, reliability, wide application, easy popularization and the like.
In order to solve the first technical problem, the utility model adopts the following technical scheme:
the utility model relates to a medicine adding system for in-situ calibration and adjustment of medicine adding amount, which comprises a drip tank, a pressure leading port, a gas communicating pipe, a liquid level meter, a medicine outlet tee joint, a flow meter, an adjusting valve, a calibration switch valve and a medicine outlet pipe;
the top of the drip tank is provided with a pressure guide port;
the bottom of the drip irrigation tank is communicated with one end of the medicine outlet pipe;
a calibration switch valve is arranged on the medicine outlet pipe, and the other end of the medicine outlet pipe is communicated with a side interface of the medicine outlet tee;
the upper port of the medicine outlet tee is communicated with the bottom port of the liquid level meter;
the top interface of the liquid level meter is communicated with one end of a gas communicating pipe, and the other end of the gas communicating pipe is communicated with the top of the drip tank;
the lower port of the medicine outlet tee is communicated with the inlet of the flowmeter;
the outlet of the flowmeter is communicated with the regulating valve;
the elevation of the top of the liquid level meter is equal to or higher than the elevation of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is equal to or lower than the elevation of the bottom of the drip irrigation tank.
The liquid level meter can meet the production requirement of on-site rapid observation (including but not limited to visual observation) or measurement of the volume of the medicament entering the liquid level meter under the pressure condition, and can meet the production requirement of calibrating and calibrating the flow meter; the shape, pressure rating, internal diameter, external diameter, and mounting of the gauge can be determined by those skilled in the art according to the prior art.
Furthermore, for the convenience of management, a lower interface of the medicine outlet tee joint is communicated with the regulating valve; the regulating valve is communicated with the inlet of the flowmeter.
Further: in order to facilitate installation, the medicine adding system for adjusting the medicine adding amount in a calibration mode on site comprises a drip tank, a pressure guide port, a gas communicating pipe, a liquid level meter, a connecting pipe fitting, a flowmeter, an adjusting valve, a calibration switch valve and a medicine outlet pipe;
the side surface of the lower part of the drip tank is communicated with one end of the medicine outlet pipe;
the other end of the medicine outlet pipe is communicated with a side interface at the lower part of the liquid level meter;
the side interface at the upper part of the liquid level meter is communicated with one end of a gas communicating pipe, and the other end of the gas communicating pipe is communicated with the side surface at the upper part of the drip tank;
the bottom interface of the liquid level meter is communicated with one end of the connecting pipe fitting;
the other end of the connecting pipe fitting is communicated with an inlet of the flowmeter;
the elevation of the top of the liquid level meter is equal to or higher than the elevation of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is equal to or lower than the elevation of the bottom of the drip irrigation tank.
Preferably, the lower port of the medicine outlet tee is communicated with the regulating valve; the regulating valve is communicated with the inlet of the flowmeter.
Further: in order to facilitate installation and observation, the side surface of the lower part of the drip tank is communicated with one end of the medicine outlet pipe; the other end of the gas communicating pipe is communicated with the side surface of the upper part of the drip tank; the elevation of the top of the liquid level meter is lower than that of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is higher than that of the bottom of the drip irrigation tank.
Preferably, the lower port of the medicine outlet tee is communicated with the regulating valve; the regulating valve is communicated with the inlet of the flowmeter.
Preferably: the bottom of the drip irrigation tank is communicated with one end of the medicine outlet pipe.
More preferably: the lower port of the medicine outlet tee is communicated with a regulating valve, and the regulating valve is communicated with the inlet of the flowmeter.
Furthermore, in order to facilitate safety management and maintenance, the medicine adding system for adjusting the medicine adding amount in a calibration mode on site comprises a drip tank, a pressure guide port, a gas communicating pipe, a liquid level meter, a connecting pipe fitting, a flowmeter, an adjusting valve, a calibration switch valve, a medicine outlet pipe, a medicine supplementing port, a standby port, an emptying port, a safety valve and a pressure gauge;
the pressure leading port is provided with a flange;
the top of the drip tank is provided with a vent, a safety valve and a pressure gauge;
the vent with the flange is connected and communicated with the top of the drip tank, the safety valve is connected and communicated with the drip tank, and the pressure gauge is connected and communicated with the top of the drip tank
The bottom of the drip irrigation tank is communicated with one end of a medicine outlet pipe, and the other end of the medicine outlet pipe is communicated with a side interface at the lower part of the liquid level meter;
the bottom interface of the liquid level meter is communicated with the connecting pipe fitting;
the connecting pipe fitting is communicated with an inlet of the flowmeter;
the inlet of the flowmeter is communicated with the regulating valve;
the other end of the gas communicating pipe is communicated with the top of the drip tank;
the medicine supplementing port is communicated with the bottom of the drip irrigation tank, and the standby port is communicated with the bottom of the drip irrigation tank;
the elevation of the top of the liquid level meter is equal to or higher than the elevation of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is equal to or lower than the elevation of the bottom of the drip irrigation tank.
Preferably, the connecting pipe fitting is communicated with the regulating valve by threads; the regulating valve is communicated with the inlet of the flowmeter.
Further, the drip tank, the pressure guiding port, the gas communicating pipe, the medicine outlet tee joint, the medicine outlet pipe, the medicine supplementing port, the standby port and the emptying port are made of carbon steel or other metals; the regulating valve, the calibration switch valve and the safety valve are steel valves or other metal valves; the flowmeter and the liquid level meter are made of steel or other metals; the connecting pipe fitting is a high-pressure hose reinforced by steel wires or other high-strength fibers; the bracket is made of nonmetal.
Further, the flowmeter is any one of a gear flowmeter, a rotor flowmeter, an ultrasonic flowmeter, an external clamp type ultrasonic flowmeter, a portable ultrasonic flowmeter, an electromagnetic flowmeter, a float flowmeter, a water meter, an amoebic flowmeter, a bent pipe flowmeter, a balance flowmeter, a wedge flowmeter, a target flowmeter, a vortex flowmeter, a turbine flowmeter, an orifice plate flowmeter, a vortex flowmeter and a differential pressure flowmeter.
Further, the liquid level meter is any one of a magnetic turning plate liquid level meter, a magnetic floater type liquid level meter, a magnetic sensitive electronic double-color liquid level meter, a glass tube liquid level meter, a glass plate type liquid level meter, a color quartz tube type liquid level meter, a sight glass type liquid level meter and an ultrasonic liquid level meter.
Furthermore, the liquid level meter is a remote transmission type magnetic float type liquid level meter which is manufactured by utilizing a buoyancy principle, a magnetic coupling effect, a sensor, a transmitter and a display instrument.
Further, for signal remote transmission, the liquid level meter comprises a shell with a flange, a magnetic floating ball liquid level transmitter with a flange, an upper interface and a bottom interface; the lower end of the magnetic floating ball liquid level transmitter extends to the lower part in the shell, and the upper end of the magnetic floating ball liquid level transmitter is connected with a flange at the top of the shell;
the magnetic floating ball liquid level transmitter can convert the liquid level into a standard electric signal and remotely transmit the standard electric signal; when the liquid level changes, the static pressure type liquid level transmitter can effectively measure the liquid level.
Further, for signal remote transmission, the liquid level meter comprises a threaded shell, a threaded static pressure type liquid level transmitter, an upper interface and a bottom interface, wherein the lower end of the static pressure type liquid level transmitter extends to the lower part in the shell, and the upper part of the static pressure type liquid level transmitter is in threaded connection with the top of the shell;
the static pressure type liquid level transmitter is a magnetostrictive liquid level transmitter;
the static pressure type liquid level transmitter can convert the liquid level into a standard electric signal and transmit the standard electric signal remotely; when the liquid level changes, the static pressure type liquid level transmitter can effectively measure the liquid level.
Further, for signal remote transmission, the liquid level meter comprises a shell, a pressure transmitter, an upper interface and a bottom interface, wherein the pressure transmitter is arranged at the lower part of the shell;
the pressure transmitter can convert the liquid level into a standard electric signal and transmit the standard electric signal remotely; when the liquid level changes, pressure transmitter can carry out effective measurement to the liquid level.
Further, in order to reduce the cost, the liquid level meter comprises a shell, a pressure gauge, a top connector and a bottom connector, wherein the pressure gauge is arranged at the lower part of the shell;
the pressure gauge is a precision pressure gauge with 0.1-level precision.
Further, in order to reduce the cost, the liquid level meter comprises a shell, a magnetic float, a top interface, colored iron powder and a bottom interface, wherein the magnetic float is arranged in the shell, and the colored iron powder is arranged outside the shell and at a position corresponding to the magnetic float;
the working principle is as follows: when the magnetic float rises or falls down along with the liquid level, the colored iron powder on the outer wall of the shell rises or falls along with the magnetic float, and the liquid level can be indicated.
Further, in order to maintain pressure, the drip tank is a closed container or/and a pressure container.
In order to solve the second technical problem, the method for adjusting the dosing amount by the on-site calibration of the dosing system of the utility model adopts the first technical scheme that: the method for adjusting the dosing flow of the dosing system through in-situ calibration in the dosing process of the natural gas pipeline comprises the following steps:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the top of the natural gas pipeline;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
on the upper part or the top of the natural gas pipeline, a pressure guiding pipe is used for connecting and communicating a pressure guiding port with the natural gas pipeline, so that the pressure in the drip tank and the liquid level meter is automatically balanced with the pressure in the natural gas pipeline;
the upper part or the top of the natural gas pipeline is communicated with the regulating valve and the natural gas pipeline by a pesticide conveying pipe;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to sequentially pass through the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe under the action of gravity and enter the natural gas pipeline;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening the calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and allowing the medicament in the drip tank to sequentially pass through the medicament outlet pipe, the calibration switch valve, the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe under the action of gravity to enter the natural gas pipeline;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
Further, for convenience of management, in step 2): the natural gas pipeline is vertically connected and communicated with the upper part or the top part of the natural gas pipeline by a valve, and then a pressure guiding pipe is used for connecting and communicating a pressure guiding opening and the valve; opening the valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the natural gas pipeline;
the valve is vertically connected and communicated with the upper part or the top of the natural gas pipeline, and then the regulating valve is connected and communicated with the valve 901 by the medicine conveying pipe; and opening the valve to connect and communicate the regulating valve with the natural gas pipeline.
In order to solve the second technical problem, the method for adjusting the dosing amount by the on-site calibration of the dosing system of the utility model adopts a second technical scheme that: the method for adjusting the dosing flow of the dosing system through in-situ calibration in the dosing process of the gas well casing comprises the following steps:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the central line of the sleeve valve;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
connecting and communicating a junction pipe with one closed end with a sleeve valve;
connecting and communicating the pressure guiding port with the top of the junction pipe by using a pressure guiding pipe, and opening a sleeve valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the sleeve;
the regulating valve is communicated with the top of the junction pipe by a medicine conveying pipe;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to sequentially pass through the medicament outlet tee joint, the flow meter, the regulating valve, the medicament conveying pipe, the junction pipe and the sleeve valve under the action of gravity to enter the sleeve;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter 305 in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening the calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and simultaneously enabling the medicament in the drip tank to sequentially pass through the medicament outlet pipe, the calibration switch valve, the medicament outlet tee joint, the flow meter, the regulating valve, the medicament conveying pipe, the junction pipe and the sleeve valve to enter the sleeve under the action of gravity;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
Further, for convenience of management, in step 2): the top of the collecting pipe is connected and communicated with the top of the collecting pipe through threads by a valve, and then a pressure guiding pipe is used for connecting and communicating a pressure guiding opening with the valve; opening the valve and the sleeve valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the sleeve;
the top of the junction pipe is connected and communicated with the top of the junction pipe through a valve by screw threads, and then the regulating valve is connected and communicated with the valve through a medicine conveying pipe; opening the valve to connect and communicate the regulating valve with the sleeve;
in order to solve the second technical problem, the method for adjusting the dosing amount by the on-site calibration of the dosing system of the utility model adopts a third technical scheme that: the method for adjusting the dosing flow of the dosing system through in-situ calibration in the dosing process of the gas well ground pipeline comprises the following steps:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the central line of the sleeve valve;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
the pressure guiding pipe is used for connecting and communicating the pressure guiding port with the oil pipe valve through threads, and the oil pipe valve is opened, so that the pressure in the drip tank and the liquid level meter is automatically balanced with the pressure in the oil pipe;
the regulating valve is communicated with the ground pipeline by a medicine conveying pipe through threaded connection; opening an outlet valve of the oil pipe to connect and communicate the regulating valve with the ground pipeline and the oil pipe;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to sequentially pass through the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe under the action of gravity and enter a ground pipeline;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening the calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and allowing the medicament in the drip tank to sequentially pass through the medicament outlet pipe, the calibration switch valve, the medicament outlet tee joint, the flow meter, the regulating valve and the medicament conveying pipe under the action of gravity to enter the ground pipeline;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
Further, for convenience of management, in step 2): firstly, connecting and communicating the valve with an oil pipe valve by using a valve, and then connecting and communicating a pressure guiding port with the valve by using a pressure guiding pipe; opening the valve and the oil pipe valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the oil pipe;
firstly, connecting and communicating with a ground pipeline by using a valve, and then connecting and communicating an adjusting valve with the valve by using a medicine conveying pipe; and opening the valve and the outlet valve of the oil pipe to connect and communicate the regulating valve with the ground pipeline and the oil pipe.
In order to solve the second technical problem, the fourth technical solution adopted in the method for adjusting the dosing amount by the on-site calibration of the dosing system of the present invention is: the method for adjusting the dosing flow of the dosing system through in-situ calibration in the dosing process of the oil jacket differential pressure ground pipeline comprises the following steps:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the central line of the sleeve valve;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
the pressure guiding pipe is used for connecting and communicating the pressure guiding port with the sleeve valve through threads, and the sleeve valve is opened, so that the pressure in the drip tank and the liquid level meter is automatically balanced with the pressure in the sleeve;
the regulating valve is communicated with the ground pipeline by a medicine conveying pipe through threaded connection; opening an outlet valve of the oil pipe to connect and communicate the regulating valve with the ground pipeline and the oil pipe;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to sequentially pass through the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe to enter a ground pipeline under the action of the sleeve pressure;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening the calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and simultaneously enabling the medicament in the drip tank to sequentially enter a ground pipeline through the medicament outlet pipe, the calibration switch valve, the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe under the action of the pressure of the casing pipe;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
Further, for convenience of management, in step 2): firstly, connecting and communicating a valve with a sleeve valve, and then connecting and communicating a pressure guiding opening with the valve by using a pressure guiding pipe; opening the valve and the sleeve valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the sleeve;
firstly, connecting and communicating with a ground pipeline by using a valve, and then connecting and communicating an adjusting valve with the ground pipeline by using a thread by using a medicine conveying pipe; and opening the valve and the outlet valve of the oil pipe to connect and communicate the regulating valve with the ground pipeline and the oil pipe.
In order to solve the second technical problem, the method for adjusting the dosing amount by the on-site calibration of the dosing system of the present invention adopts a fifth technical solution: the method for adjusting the dosing flow of the dosing system through in-situ calibration in the dosing process of the oil well casing comprises the following steps:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the central line of the sleeve valve;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
connecting and communicating the junction pipe with one closed end with an oil well casing valve through pipe threads;
the pressure guiding port is communicated with the top of the junction pipe by a pressure guiding pipe through thread connection, and an oil well casing valve is opened to ensure that the pressure in the drip tank and the liquid level meter is automatically balanced with the pressure in the oil well casing;
the regulating valve is communicated with the junction pipe through a medicine conveying pipe by screw connection;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to enter the oil well casing through the medicament outlet tee joint, the flow meter, the regulating valve, the medicament conveying pipe, the junction pipe and the oil well casing valve in sequence under the action of gravity;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening a calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and simultaneously enabling the medicament in the drip tank to sequentially pass through a medicament outlet pipe, the calibration switch valve, a medicament outlet tee joint, a flowmeter, an adjusting valve, a medicament conveying pipe, a junction pipe and an oil well casing valve under the action of gravity to enter an oil well casing;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
Further, for convenience of management, in step 2): firstly, a valve is communicated with the top or the upper part of the junction pipe, and then a pressure guiding pipe is used for communicating a pressure guiding opening with the valve; opening the valve and the oil well casing valve to make the pressure in the drip tank and the liquid level meter automatically balance with the pressure in the oil well casing;
the valve is connected and communicated with the junction pipe firstly, and then the regulating valve is connected and communicated with the valve by the medicine conveying pipe; and opening the valve to connect and communicate the regulating valve with the oil well casing.
The utility model has the advantages as follows: the utility model overcomes the defects of dosing flow metering, adjusting and controlling of the existing dosing system, can calibrate and adjust the dosing flow (or dosing amount) on site, can effectively solve the problems of dosing flow metering, adjusting, controlling and bias flow of the dosing system, can save the dosing amount, and can meet the dosing requirement required by production; the method has the advantages of easy implementation, safety, reliability, wide application, easy popularization and the like.
Drawings
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings
FIG. 1 is a schematic view of a prior art 1-pump 2-tube dosing system;
FIG. 2 is a schematic diagram of a prior art flowmeter calibration apparatus;
FIG. 3 is a schematic view of the dosing system of example 1;
FIG. 4 is a schematic view of the dosing system of example 2;
FIG. 5 is a schematic view of the dosing system of example 3;
FIG. 6 is a schematic view of the dosing system of example 4;
FIG. 7 is a schematic view of the dosing system of example 5;
FIG. 8 is a schematic view of the dosing system of example 6;
FIG. 9 is a schematic view of the dosing system of example 7;
FIG. 10 is a schematic view of the drug administration system of example 8;
FIG. 11 is a schematic view of the drug administration system of example 9;
FIG. 12 is a schematic view of the drug administration system of example 10;
FIG. 13 is a schematic view of a liquid level gauge in embodiment 15;
FIG. 14 is a schematic view of a liquid level gauge in embodiment 16;
FIG. 15 is a schematic view of a liquid level gauge in embodiment 17;
FIG. 16 is a schematic view of a liquid level gauge in embodiment 18;
FIG. 17 is a schematic view of a liquid level gauge in embodiment 19;
FIG. 18 is a schematic view of an atmospheric calibration test apparatus for a flowmeter in example 1;
FIG. 19 is a schematic diagram of the in situ calibration and adjustment of dosing flow rate for a natural gas line according to example 21;
FIG. 20 is a schematic illustration of the in situ calibration adjustment method for dosing flow to a gas well casing according to example 22;
FIG. 21 is a schematic view of the in situ calibration and adjustment method for dosing a natural gas line according to example 23;
FIG. 22 is a schematic illustration of the in situ calibration adjustment method for dosing flow to a gas well casing according to example 24;
FIG. 23 is a schematic illustration of the in situ calibration method for adjusting the dosing flow rate of the gas well surface pipeline in example 25;
FIG. 24 is a schematic illustration of a method for in situ calibration of the regulated flow of chemicals to the surface pipeline of a gas well in example 26;
FIG. 25 is a schematic diagram of the in situ calibration adjustment of differential pressure oil jacket ground line dosing flow method of example 27;
FIG. 26 is a schematic diagram of the in situ calibration adjustment of differential pressure oil jacket ground line dosing flow method of example 28;
FIG. 27 is a schematic illustration of the in situ calibration adjusted oil well casing dosing flow method of example 29;
FIG. 28 is a schematic illustration of the method of adjusting the charge flow rate of an oil well casing for in situ calibration in example 30.
Detailed Description
Example 1
Referring to fig. 3, the medicine adding system for adjusting the medicine adding amount through in-situ calibration comprises a drip tank 300, a pressure guide port 301, a gas communicating pipe 302, a liquid level meter 303, a medicine outlet tee 304, a flow meter 305, an adjusting valve 306, a calibration switch valve 307 and a medicine outlet pipe 308;
the top of the drip tank 300 is provided with a pressure leading port 301;
the bottom of the drip tank 300 is communicated with one end of a medicine outlet pipe 308;
a calibration switch valve 307 is arranged on the medicine outlet pipe 308, and the other end of the medicine outlet pipe 308 is communicated with a side interface of the medicine outlet tee 304;
the upper port of the medicine outlet tee 304 is communicated with the bottom port of the liquid level meter 303;
the top interface of the liquid level meter 303 is communicated with one end of a gas communicating pipe 302, and the other end of the gas communicating pipe 302 is communicated with the top of the drip tank 300;
the lower interface of the medicine outlet tee 304 is communicated with the inlet of a flowmeter 305;
the outlet of the flow meter 305 is communicated with a regulating valve 306;
the drip tank 300 is a horizontal pressure tank welded by manganese steel, the length is 2 meters, the inner diameter is 400mm, the wall thickness is 50mm, the design pressure is 25MPa, and the effective volume is 250 liters;
the top of the drip tank 300 is welded with DN15 and a PN250 manganese steel pressure-leading port 301;
the bottom of the drip tank 300 is communicated with one end of a DN15 and PN250 manganese steel medicine outlet pipe 308 by welding;
the other end of the medicine outlet pipe 308 is communicated with the side interfaces of the DN15 and the PN250 stainless steel medicine outlet tee 304 through threads;
the upper interface of the medicine outlet tee 304 is communicated with the bottom interface of the liquid level meter 303 through threads, and the liquid level meter 303 is a stainless steel magnetic turning plate liquid level meter with the design pressure of 25MPa, the inner diameter of 50mm, the length of a graduated scale of 1 meter, the graduated division value of 1mm and the upper interface at the top and the lower interface at the bottom;
the top interface of the liquid level meter 303 is in threaded connection and communication with one end of a DN15 and PN250 stainless steel gas communicating pipe 302, and the other end of the gas communicating pipe 302 is in threaded connection and communication with the top of the drip tank 300;
the lower interface of the medicine outlet tee 304 is communicated with the inlet of a stainless steel gear flowmeter 305 with the accuracy of 0.5 grade, the measuring range of 0.3-60 liters/hour and the design pressure of 32MPa by thread connection;
the outlet of the flowmeter 305 is communicated with DN15 and a PN250 stainless steel regulating valve 306 through threaded connection;
the level at the top of the level gauge 303 is equal to or higher than the level at the top of the drip tank 300;
the level at the bottom of the level gauge 303 is equal to or lower than the level at the bottom of the drip tank 300.
As is known in the art: the stainless steel magnetic flap liquid level meter belongs to the mature technology, is made by utilizing the buoyancy principle and the magnetic coupling effect, and can accurately display the liquid level in a metal pipe; the interface positions can be at the top and the bottom, and can also be at the upper and the lower sides, which allow the liquid and the gas to enter and exit; the inner diameter of a metal pipe of the stainless steel magnetic turning plate liquid level meter is known, and the liquid volume in the stainless steel magnetic turning plate liquid level meter can be accurately calculated according to the displayed liquid level value.
Calculated according to the above example data, the gauge has a volume of 2 ml at a height of 1mm and a volume of 20 ml at a height of 10 mm; therefore, the method for visually measuring the height change of the medicament entering the liquid level meter in unit time (namely the liquid level change of the liquid level meter) can be used for quickly calculating and calibrating the medicament quantity and the medicament flow entering the liquid level meter, and the production requirement of quickly calibrating the medicament adding flow by using the liquid level meter on site under the pressure condition is met.
Taking a normal pressure calibration test of the gear flowmeter as an example.
As shown in fig. 18, the outline of the calibration experimental apparatus is: the outer diameter of the drip tank 300 is 500mm, and the inner diameter is 400 mm; the liquid level meter 303 is a stainless steel magnetic turning plate liquid level meter and is made of a stainless steel pipe with the inner diameter of 50mm, a magnetic floater is arranged inside the steel pipe, a two-color rotor and a scale with the length of 1 meter are arranged outside the steel pipe, and the minimum scale division value is 1 mm; the medicine outlet pipe 308, the pressure guide port 301 and the gas communicating pipe 302 are all DN15 stainless steel pipes, the calibration switch valve 307 is a DN15 stainless steel ball valve, the regulating valve 306 is a DN15 stainless steel stop valve, the medicine outlet tee 304 is DN15 stainless steel, and the flowmeter 305 is a gear flowmeter with the precision of 0.5 grade and the measuring range of 0.3-60 liters/hour; the pressure inlet 301 is open to the atmosphere, and the drip tank 300 and the level gauge 303 both connected to the gas communication pipe 302 are at normal pressure.
The test steps are summarized as follows:
1) and a first step: closing the regulating valve 306, opening the calibration switch valve 307, adding clear water into the drip tank 300 to more than two thirds of the tank level, and automatically balancing the liquid level in the drip tank 300 and the liquid level of the liquid level meter 303;
2) and the second step: the regulating valve 306 is opened, and the clear water in the drip tank 300 flows out through the medicine outlet pipe 308, the calibration switch valve 307, the medicine outlet tee 304, the flow meter 305 and the regulating valve 306 in sequence under the action of gravity; adjusting the opening of the regulating valve 306 until the instantaneous flow value of the gear flowmeter 305 is 1.5-2L/h;
3) and the third step: the calibration switch valve 307 is closed, the clear water in the drip tank 300 stops flowing out, and the clear water in the liquid level meter 303 sequentially flows out through the medicine outlet tee 304, the flow meter 305 and the regulating valve 306 under the action of gravity;
4) the measuring cylinder 601 receives the water yield of the regulating valve 306 for 10 minutes in timing, and reads the liquid level scale value of the liquid level meter when the timing is started and ended; meanwhile, the accumulated flow reading of the gear flowmeter is rapidly reset to be 0, and the instantaneous flow value and 10-minute accumulated flow of the flowmeter 305 at the beginning and the end of timing are read;
as is known in the art: the existing small-range gear flowmeter is in a digital display mode, can simultaneously display instantaneous flow and accumulated amount, and can quickly reset the accumulated flow to zero, so that the accumulated flow of the gear flowmeter can be accurately obtained by utilizing a quick zero resetting method; at present, no successful precedent or public data for the application of the pointer type small-range gear flowmeter exists in China.
5) The water yield of 10 minutes is accurately measured by the measuring cylinder, the water reducing amount of the liquid level meter is accurately calculated according to the liquid level scale value and the inner diameter of the liquid level meter reduced for 10 minutes, and the average metering flow of the gear flowmeter is calculated according to the instantaneous flow value or the 10-minute accumulated flow value of the flowmeter 305;
6) calculating the metering error of the liquid level meter according to a formula of metering error of the liquid level meter (water yield-water amount reduced by the liquid level meter) ÷ water yield multiplied by 100% ', and calculating the average metering flow error of the gear flow meter according to a formula of metering error of the gear flow meter (water yield-average metering flow of the gear flow meter) ÷ water yield multiplied by 100%'; then, a calibration measurement error value is further calculated according to the following steps: the calibrated metering error value is the average metering flow error of the gear flowmeter-the metering error of the liquid level meter;
7) calibrating and correcting other flow values of the gear flowmeter according to the calibrated metering error value in the step 6).
As is known in the art: methods for calibrating and correcting any flow value of a gear flowmeter based on calibrated measurement error values are common in the art.
The test results show that: when water flows out from the liquid level meter 303 through the medicine outlet tee joint 304, the flow meter 305 and the regulating valve 306, if the average flow of the gear flow meter for 10 minutes is 1.7 liters/hour, the average actual flow of the gear flow meter for 10 minutes is calibrated to be 3.2 liters/hour by using the measuring cylinder, so that the metering error of the gear flow meter is up to 47 percent, and the leakage loss of the gear flow meter is up to 1.5 liters/hour by calculation; meanwhile, when the water outlet flow of the liquid level meter 303 calculated according to the liquid level reduction value is 3.1 liters/hour, the metering error of the liquid level meter is only 3.1 percent according to calculation; further calculation shows that the calibrated metering error value of the gear flowmeter by the liquid level meter is 44%; the measurement error value is calibrated, and other instantaneous flow and accumulated flow measured by the gear flowmeter can be calibrated and corrected.
Known knowledge shows that: the national standard stipulates that the maximum metering error allowable value of industrial meters and flowmeters is 4 percent.
Further tests show that: the similar test is carried out after the clear water is replaced by the methanol, and the obtained experimental conclusions are completely the same;
further tests show that: the measurement time is changed from 10 minutes to other time for carrying out similar tests, and the obtained experimental conclusions are completely the same;
from the above, it can be seen that: the above tests show that the gear flowmeter can be accurately calibrated by using the example data and the liquid level meter, and the requirements of national standards and industrial production are completely met.
Example 2
Referring to fig. 4, example 1 is repeated except that: a medicine adding system for on-site calibration and adjustment of medicine adding amount comprises a drip tank 300, a pressure guide port 301, a gas communicating pipe 302, a liquid level meter 303, a connecting pipe 401, a flow meter 305, an adjusting valve 306, a calibration switch valve 307 and a medicine outlet pipe 308;
the side surface of the lower part of the drip cup 300 is communicated with one end of a medicine outlet pipe 308;
the other end of the medicine outlet pipe 308 is communicated with a lower side interface of the liquid level meter 303;
the side interface at the upper part of the liquid level meter 303 is communicated with one end of a gas communicating pipe 302, and the other end of the gas communicating pipe 302 is communicated with the side surface at the upper part of the drip tank 300;
the bottom interface of the liquid level meter 303 is communicated with one end of a connecting pipe fitting 401;
the other end of the connecting pipe fitting 401 is communicated with the inlet of the flowmeter 305;
the drip tank 300 is a horizontal pressure tank made of 20# steel by welding, the length is 3 meters, the inner diameter is 600mm, the wall thickness is 50mm, the design pressure is 20MPa, and the effective volume is 800 liters;
the side surface of the lower part of the drip cup 300 is connected and communicated with DN15 and one end of a PN250 stainless steel medicine outlet pipe 308 by screw threads;
the other end of the medicine outlet pipe 308 is communicated with a lower side interface of the liquid level meter 303 through threads; the liquid level meter 303 is a stainless steel magnetic turning plate liquid level meter with the design pressure of 20MPa, the inner diameter of 25mm, the length of a graduated scale of 1.2 meters and the graduation value of 1mm, the upper side interface is a gas inlet and outlet, the lower side interface is a liquid inlet, and the bottom interface is a liquid outlet;
the side interface at the upper part of the liquid level meter 303 is communicated with one end of a gas communicating pipe 302 by screw threads, and the other end of the gas communicating pipe 302 is welded at the side surface at the upper part of the drip tank 300 and is communicated with the drip tank;
the bottom interface of the liquid level meter 303 is communicated with one end of a connecting pipe fitting 401 made of DN15 and PN250 stainless steel through threads;
the other end of the connecting pipe fitting 401 is communicated with the inlet of the flowmeter 305 through threads;
the level at the top of the level gauge 303 is equal to or higher than the level at the top of the drip tank 300;
the level at the bottom of the level gauge 303 is equal to or lower than the level at the bottom of the drip tank 300.
As is known in the art: the liquid level meter belongs to the mature technology; the upper interface is generally a gas inlet and outlet, and the position can be on the top, the side surface of the upper part, or 2 interfaces are arranged on the top and the side surface of the upper part at the same time; the lower interface is a liquid inlet and outlet, and the position can be at the bottom, the side surface of the lower part, or 2 interfaces at the bottom and the side surface of the lower part.
Example 3
Referring to fig. 5, example 1 is repeated except that:
the side surface of the lower part of the drip cup 300 is communicated with one end of a medicine outlet pipe 308;
the other end of the gas communicating pipe 302 is communicated with the side surface of the upper part of the drip tank 300;
the side surface of the lower part of the drip tank 300 is connected and communicated with DN15 and one end of a PN250 manganese steel medicine outlet pipe 308 by screw threads;
the liquid level meter 303 is a stainless steel magnetic turning plate liquid level meter with the design pressure of 25MPa, the inner diameter of 50mm, the length of a graduated scale of 0.35 m, the graduation value of 1mm, an upper connector at the top and a lower connector at the bottom;
the other end of the gas communicating pipe 302 is communicated with the side surface of the upper part of the drip tank 300 by welding;
the elevation of the top of the liquid level meter 303 is 50mm lower than the elevation of the top of the drip tank 300;
the elevation of the bottom of the liquid level meter 303 is 50mm higher than the elevation of the bottom of the drip tank 300.
Experiments show that: when the elevation of the bottom of the liquid level meter is higher than the elevation of the bottom of the drip irrigation tank or/and the elevation of the top of the liquid level meter is lower than the elevation of the top of the drip irrigation tank, the metering error of the gear flowmeter can be effectively calibrated by the liquid level meter, and therefore the production requirement of rapidly calibrating the dosing flow on site by the liquid level meter under the pressure condition is met.
Example 4
Referring to fig. 6, examples 1 and 3 were repeated except that:
the bottom of the drip tank 300 is communicated with one end of the medicine outlet pipe 308 by welding.
Example 5
Referring to fig. 7, example 1 was repeated except that:
the lower port of the medicine outlet tee 304 is communicated with the regulating valve 306 by screw thread connection;
the regulating valve 306 is in threaded communication with the inlet of the flow meter 305.
Example 6
Referring to fig. 8, example 2 is repeated except that:
the lower port of the medicine outlet tee 304 is communicated with the regulating valve 306 by screw thread connection;
the regulating valve 306 is in threaded communication with the inlet of the flow meter 305.
Example 7
Referring to fig. 9, example 3 is repeated except that:
the lower port of the medicine outlet tee 304 is communicated with the regulating valve 306 by screw thread connection;
the regulating valve 306 is in threaded communication with the inlet of the flow meter 305.
Example 8
Referring to fig. 10, examples 3-4 were repeated except that:
the lower port of the medicine outlet tee 304 is communicated with the regulating valve 306 by screw thread connection;
the regulating valve 306 is in threaded communication with the inlet of the flow meter 305.
Example 9
Referring to fig. 11, example 1 is repeated except that:
a medicine adding system for on-site calibration and adjustment of medicine adding amount comprises a drip tank 300, a pressure guide port 301, a gas communicating pipe 302, a liquid level meter 303, a connecting pipe 401, a flow meter 305, an adjusting valve 306, a calibration switch valve 307, a medicine outlet pipe 308, a medicine supplementing port 501, a standby port 502, a vent port 503, a safety valve 504 and a pressure gauge 505;
the pressure guide port 301 is provided with a flange;
the top of the drip tank 300 is provided with a vent 503, a safety valve 504 and a pressure gauge 505;
the DN15 and the PN250 stainless steel strip flange vent 503 are communicated with each other at the top of the drip tank 300 by welding, and the DN15 stainless steel safety valve 504 is communicated with the top of the drip tank 300 by a flange; the pressure gauge 505 with the accuracy of 1.6 grade and the measuring range of 0-40 MPa is connected and communicated with the top of the drip tank 300 by a flange
The bottom of the drip tank 300 is communicated with one end of a medicine outlet pipe 308 through a flange, and the other end of the medicine outlet pipe 308 is communicated with a lower side interface of the liquid level meter 303 through threads;
the bottom interface of the liquid level meter 303 is communicated with a connecting pipe 401 through threads;
the connecting pipe 401 is communicated with the inlet of the flowmeter 305 through threads;
the inlet of the flow meter 305 is connected and communicated with the regulating valve 306 by threads;
the other end of the gas communicating pipe 302 is connected and communicated with the top of the drip tank 300 by a flange;
the DN15 and the PN250 stainless steel strip flange medicine supplementing port 501 are communicated with the bottom of the drip tank 300 by welding;
the DN15 and the PN250 stainless steel strip flange spare port 502 are communicated with the bottom of the drip tank 300 by welding.
Example 10
Referring to fig. 12, example 9 is repeated except that:
the connecting pipe 401 is communicated with the regulating valve 306 through threads;
the regulator valve 306 is in threaded communication with the inlet connection of the flow meter 305.
Example 11
Examples 1-10 were repeated with the following differences: the drip tank, the pressure guiding port, the gas communicating pipe, the medicine outlet tee joint, the medicine outlet pipe, the medicine supplementing port, the standby port and the emptying port are made of carbon steel or other metals; the regulating valve, the calibration switch valve and the safety valve are steel valves or other metal valves; the flowmeter and the liquid level meter are made of steel or other metals; the connecting pipe fitting is a high-pressure hose reinforced by steel wires or other high-strength fibers; the bracket is made of nonmetal.
Example 12
Examples 1-10 were repeated with the following differences: the flowmeter is any one of a gear flowmeter, a rotor flowmeter, an ultrasonic flowmeter, an external clamp type ultrasonic flowmeter, a portable ultrasonic flowmeter, an electromagnetic flowmeter, a float flowmeter, a water meter, an amoebic flowmeter, a bent pipe flowmeter, a balance flowmeter, a wedge flowmeter, a target flowmeter, a vortex flowmeter, a turbine flowmeter, a pore plate flowmeter, a vortex flowmeter and a differential pressure flowmeter.
Example 13
Examples 1-10 were repeated with the following differences: the liquid level meter is any one of a magnetic turning plate liquid level meter, a magnetic floater type liquid level meter, a magnetic sensitive electronic double-color liquid level meter, a glass tube liquid level meter, a glass plate type liquid level meter, a color quartz tube type liquid level meter, a sight glass type liquid level meter and an ultrasonic liquid level meter.
Example 14
Examples 1-10 were repeated with the following differences: the liquid level meter is a remote transmission type magnetic floater type liquid level meter which is manufactured by utilizing a buoyancy principle, a magnetic coupling effect, a sensor, a transmitter and a display instrument.
Example 15
Referring to fig. 13, examples 1-10 were repeated except that: the liquid level meter 303 comprises a housing 3031 with a flange, a magnetic floating ball liquid level transmitter 3032 with a flange, an upper interface 3033 and a bottom interface 3034; the lower end of the magnetic floating ball liquid level transmitter 3032 extends to the inner lower part of the shell 3031, and the upper end of the magnetic floating ball liquid level transmitter 3032 is connected with a flange at the top of the shell 3031;
the magnetic floating ball liquid level transmitter 3032 can convert the liquid level into a standard electric signal and transmit the standard electric signal remotely; when the liquid level changes, the static pressure type liquid level transmitter can effectively measure the liquid level.
Example 16
Referring to fig. 14, examples 1-10 were repeated except that: the liquid level meter 303 comprises a threaded housing 3131, a threaded static pressure type liquid level transducer 3132, an upper interface 3133 and a bottom interface 3134, the lower end of the static pressure type liquid level transducer 3132 extends to the inner lower part of the housing 3131, and the upper part of the static pressure type liquid level transducer 3132 is in threaded connection with the top of the housing 3131;
the static pressure liquid level transducer 3132 is a magnetostrictive liquid level transducer;
the static pressure type liquid level transducer 3132 can convert the liquid level into a standard electrical signal and transmit the signal remotely; when the liquid level changes, the static pressure type liquid level transmitter can effectively measure the liquid level.
Example 17
Referring to fig. 15, examples 1-10 were repeated except that: the liquid level meter 303 comprises a shell 3231, a pressure transmitter 3232, an upper interface 3233 and a bottom interface 3234, wherein the pressure transmitter 3232 is arranged at the lower part of the shell 3231;
the pressure transmitter 3232 can convert the liquid level into a standard electrical signal and transmit the signal remotely; when the liquid level changes, pressure transmitter can carry out effective measurement to the liquid level.
Example 18
Referring to fig. 16, examples 1-10 are repeated except that: the liquid level meter 303 comprises a shell 3331, a pressure gauge 3332, a top port 3333 and a bottom port 3334, wherein the pressure gauge 3332 is arranged at the lower part of the shell 3331;
the pressure gauge 3332 is a precision pressure gauge with 0.1-level precision.
Example 19
Referring to fig. 17, examples 1-10 were repeated except that: the liquid level meter 303 comprises a housing 3431, a magnetic float 3432, a top interface 3433, a colored iron powder 3434 and a bottom interface 3435, wherein the magnetic float 3432 is disposed in the housing 3431, and the colored iron powder 3434 is disposed outside the housing 3431 at a position corresponding to the magnetic float 3432;
the working principle is as follows: when the magnetic float 3432 rises or falls with the liquid level, the colored iron powder 3434 on the outer wall of the housing 3431 rises or falls with it, indicating the liquid level.
Example 20
Examples 1-8 were repeated with the following differences: for convenience of management, the drip tank is provided with a pressure gauge or a pressure transmitter, a safety valve, an emptying valve, a blow-down valve and a medicine replenishing valve.
Example 21
Referring to fig. 19, the method for in-situ calibration and adjustment of dosing flow during natural gas line dosing for the dosing system of examples 1-20 comprises the following steps:
1) erecting a drip tank:
the drip tank 300 is placed on a stand 701 such that the elevation at the bottom of the drip tank 300 is 1.5 meters higher than the elevation at the top of the natural gas line 704;
the bracket 701 is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
on the upper part or the top of the natural gas pipeline 704, a pressure guiding pipe 703 is used for connecting and communicating the pressure guiding port 301 with the natural gas pipeline 704, so that the pressure in the drip tank 300 and the liquid level meter 303 and the pressure in the natural gas pipeline 704 are automatically balanced;
the regulating valve 306 is connected and communicated with the natural gas pipeline 704 by a drug delivery pipe 702 at the upper part or the top part of the natural gas pipeline 704;
3) balancing liquid level:
opening a calibration switch valve 307 to automatically balance the liquid levels in the drip tank 300 and the liquid level meter 303;
4) drip the medicament in the level gauge:
the calibration switch valve 307 is closed, the regulating valve 306 is opened, and the medicament in the liquid level meter 303 sequentially passes through the medicament outlet tee 304, the flow meter 305, the regulating valve 306 and the medicament conveying pipe 702 under the action of gravity and enters the natural gas pipeline 704;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter 303 when the timing is started and ended; at the same time, reading the instantaneous flow rate value of the flowmeter 305 at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the scale value of the liquid level meter 303 at the beginning and the end of timing and the known inner diameter of the scale value, and further calculating the medicine discharging flow rate of the liquid level meter within unit time; calculating the average instantaneous flow rate of the flowmeter 305 within the timing time according to the instantaneous flow rate values of the flowmeter 305 at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter 305 in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
known from the knowledge in the art: taking a pressure gauge as an example, a low-precision pressure gauge with the precision of 1.6 grades is calibrated by a precision pressure gauge with the precision of 0.5 grade to accord with the principle of a metering technology; the national standard stipulates that the maximum metering error allowable value of an industrial instrument and a flowmeter is 4 percent; the processing error of the inner diameter of the metal pipe of the liquid level meter is extremely small, and the volume error of the liquid level meter calculated according to the processing error is less than 1 percent; when all the medicaments flowing out of the liquid level meter 303 pass through the flow meter 305, the flow of the medicaments is calibrated by using the flow of the medicaments flowing out of the liquid level meter 303 and the flow is measured by using the flow meter 305, so that the measuring technical principle of calibrating with high precision and low precision is met, and the national standard is met.
8) Adjusting and calibrating the medicine-adding flow
The calibration switch valve 307 is opened, the liquid levels in the drip tank 300 and the liquid level meter 303 are automatically balanced, and meanwhile, the medicament in the drip tank 300 enters the natural gas pipeline 704 through the medicament outlet pipe 308, the calibration switch valve 307, the medicament outlet tee 304, the flow meter 305, the regulating valve 306 and the medicament conveying pipe 702 in sequence under the action of gravity;
adjusting the opening of the regulator valve 306 and adjusting the dosing flow to the desired dosing flow by calibrating, correcting the instantaneous flow reading of the flow meter 305 according to the in situ calibrated metering error in step 7).
As is known in the art: the method for calibrating and correcting any flow value of the flowmeter according to the calibrated flowmeter metering error is a common method in the field.
Use the gas distribution valves of 2 gas injection pipelines in Qinghai gas field the utility model discloses an example.
The production and operation data of the Qinghai gas field show that: the pressure of a gas injection pipeline of the gas distribution valve group for the gas field is 10MPa, natural gas hydrate is very easy to form frozen blockage in winter, and methanol is respectively injected into 2 pipeline gas injection pipelines by using 1 metering pump and 2 pipelines to prevent frozen blockage; during 12-3 months in winter, an operator can only adjust the methanol flow of 2 gas injection pipelines by personal feeling, cannot judge and confirm the specific methanol flow and the bias flow degree of each gas injection pipeline, and cannot adjust and solve the methanol bias flow problem, so that 1 gas injection pipeline is frequently frozen and blocked, and the gas lift production of a gas well is seriously influenced.
Experiments show that: the calibration device and methanol shown in fig. 2 are used for a gear flowmeter calibration test, and the results show that: when the gear flowmeter measures the small-flow methanol, the measurement error of the gear flowmeter can reach 57 percent, which is 114 times of the factory-calibrated measurement error.
Analysis and calculation show that: methanol has a lower viscosity than water; the total daily average methanol injection amount of the 2 gas injection pipelines is 30 liters/day or 1.25 liters/hour, the average daily average methanol injection amount of each gas injection pipeline is 15 liters/day or 0.625 liters/hour, and the methanol flow is very small; if 1 gear flowmeter is respectively arranged on each alcohol injection pipeline, the flow metering error can reach more than 50 percent; the method comprises the following steps that (1) a methanol meter is averagely filled according to 2 gas injection pipelines, an operator adjusts the flow of methanol added into each gas injection pipeline to be 0.625 liter/hour according to the indicated value of a flowmeter and adjusts the discharge capacity of a metering pump to be 1.25 liter/hour, and then the antifreezing requirement of the gas injection pipelines is considered to be met; however, since the flow meter shows an error of more than 50% at 0.625 liters/hour, the actual methanol flow rate for a gas injection line may be 1.25 liters/hour (i.e., a 1-fold increase) or 0.313 liters/hour; if the actual methanol flow of the gas injection pipeline is 1.25 liters/hour, the alcohol injection quantity of the other 1 gas injection pipeline is inevitably 0 and is frozen and blocked; if the actual methanol flow of the gas injection pipeline is 0.313 liter/hour, the insufficient methanol injection amount of the gas injection pipeline is inevitably caused to freeze and block; therefore, an operator operates according to the indicated value of the flowmeter with the metering error of more than 50%, the problem of methanol bias flow of the gas injection pipeline cannot be solved, and the gas injection pipeline is inevitably frozen and blocked to influence the production of a gas well; therefore, the method of arranging a flow meter on each alcohol injection pipeline cannot effectively solve the problem of methanol bias flow.
In order to solve the methanol bias current problem that this distribution valves exists, ensure that the gas injection pipeline does not freeze stifled, do not influence the gas well production winter, this distribution valve is used in 2019 1 month the utility model discloses production test has been carried out, its technical scheme is:
1) as shown in fig. 19, 1 set of dosing system is respectively arranged near each gas injection line;
2) the drip tank of the first gas injection pipeline dosing system is erected:
placing an instillation tank 300 which is 2 meters long, 400mm in inner diameter, 50mm in thickness, 25MPa in design pressure and made of manganese steel on a support 701 with the height of 1.8 meters, so that the elevation of the bottom of the instillation tank 300 is higher than the elevation of the top of a natural gas pipeline 704 by more than 1.5 meters; the bracket 701 is formed by welding H steel;
3) connecting a first gas injection pipeline dosing system:
on the upper part or the top of the natural gas pipeline 704, 1 stainless steel pressure leading pipe 703 of DN15 and PN250 is used for connecting and communicating the DN15 and PN250 manganese steel pressure leading port 301 with the natural gas pipeline 704, so that the pressure in the drip tank 300 and the stainless steel magnetic flap liquid level meter 303 with the length of 1 meter and the design pressure of 25MPa is automatically balanced with the pressure in the natural gas pipeline 704;
at the upper part or the top of the natural gas pipeline 704, 1 high-pressure hose of DN15 and PN250 is used as a drug delivery pipe 702, and the regulating valve 306 is connected and communicated with the natural gas pipeline 704 by a threaded connection method;
4) equilibrium liquid level of the first gas injection line dosing system:
opening a calibration switch valve 307 to automatically balance the liquid levels in the drip tank 300 and the liquid level meter 303;
5) the first gas injection pipeline dosing system drips the medicament in the liquid level meter:
the calibration switch valve 307 is closed, the regulating valve 306 is opened, and the medicament in the liquid level meter 303 sequentially passes through the medicament outlet tee 304, the flow meter 305, the regulating valve 306 and the medicament conveying pipe 702 under the action of gravity and enters the natural gas pipeline 704;
6) timing reading data of first gas injection pipeline dosing system
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter 303 when the timing is started and ended; at the same time, reading the instantaneous flow rate value of the flowmeter 305 at the beginning and the end of timing;
7) calculated average value of first gas injection pipeline dosing system
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the scale value of the liquid level meter 303 at the beginning and the end of timing and the known inner diameter of the scale value, and further calculating the medicine discharging flow rate of the liquid level meter within unit time; calculating the average instantaneous flow rate of the flowmeter 305 within the timing time according to the instantaneous flow rate values of the flowmeter 305 at the beginning and the end of timing;
8) flowmeter for calculating by first gas injection pipeline dosing system calibrates metering error on spot
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 7) ÷ the average instantaneous flow rate of the flowmeter 305 in the step 7) ÷ the medicine flow rate of the liquid level meter in the step 7) × 100%';
9) adjusting and calibrating dosing flow of first gas injection pipeline dosing system
The calibration switch valve 307 is opened, the liquid levels in the drip tank 300 and the liquid level meter 303 are automatically balanced, and meanwhile, the medicament in the drip tank 300 enters the natural gas pipeline 704 through the medicament outlet pipe 308, the calibration switch valve 307, the medicament outlet tee 304, the flow meter 305, the regulating valve 306 and the medicament conveying pipe 702 in sequence under the action of gravity;
adjusting the opening of the regulator valve 306 and adjusting the dosing flow to the desired dosing flow by calibrating, correcting the instantaneous flow reading of the flow meter 305 according to the in situ calibrated metering error in step 8).
10) Adjusting and calibrating a dosing flow rate of a second gas injection pipeline dosing system: repeat step 2) -step 9).
The production experiment results show that: this distribution valves uses technical scheme afterwards, effectively solved the methyl alcohol bias flow problem of 2 gas injection pipelines, in 60 days's test time, 2 gas injection pipelines all do not appear freezing stifled problem, have ensured the normal gas lift production in gas well winter.
Example 22
Referring to fig. 20, the method for in-situ calibration and adjustment of the dosing flow rate during the dosing process of the gas well casing by the dosing system of examples 1-20 comprises the following steps:
1) erecting a drip tank:
the drip tank 300 is placed on the stand 701 such that the elevation of the bottom of the drip tank 300 is 1.5 meters higher than the elevation of the center line of the cannula valve 802;
the bracket 701 is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
a junction pipe 803 with one closed end is connected and communicated with the sleeve valve 802 by pipe threads;
the pressure guiding port 301 is communicated with the top of a DN50 junction pipe 803 through a thread by using a pressure guiding pipe 703, and a sleeve valve 802 is opened to ensure that the pressure in the drip tank 300 and the liquid level meter 303 is automatically balanced with the pressure in the sleeve 801;
the regulating valve 306 is communicated with the top of the junction pipe 803 by a medicine conveying pipe 702 through threaded connection;
3) balancing liquid level:
opening a calibration switch valve 307 to automatically balance the liquid levels in the drip tank 300 and the liquid level meter 303;
4) drip the medicament in the level gauge:
the calibration switch valve 307 is closed, the regulating valve 306 is opened, and the medicament in the liquid level meter 303 sequentially passes through the medicament outlet tee 304, the flow meter 305, the regulating valve 306, the medicament conveying pipe 702, the junction pipe 803 and the sleeve valve 802 to enter the sleeve 801 under the action of gravity;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter 303 when the timing is started and ended; at the same time, reading the instantaneous flow rate value of the flowmeter 305 at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the scale value of the liquid level meter 303 at the beginning and the end of timing and the known inner diameter of the scale value, and further calculating the medicine discharging flow rate of the liquid level meter within unit time; calculating the average instantaneous flow rate of the flowmeter 305 within the timing time according to the instantaneous flow rate values of the flowmeter 305 at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter 305 in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
The calibration switch valve 307 is opened, the liquid levels in the drip tank 300 and the liquid level meter 303 are automatically balanced, and meanwhile, the medicament in the drip tank 300 enters the sleeve 801 through the medicament outlet pipe 308, the calibration switch valve 307, the medicament outlet tee 304, the flow meter 305, the regulating valve 306, the medicament conveying pipe 702, the junction pipe 803 and the sleeve valve 802 in sequence under the action of gravity;
adjusting the opening of the regulator valve 306 and adjusting the dosing flow to the desired dosing flow by calibrating, correcting the instantaneous flow reading of the flow meter 305 according to the in situ calibrated metering error in step 7).
Example 23
Referring to fig. 21, example 21 is repeated except that:
in step 2): the valve 902 is vertically connected and communicated with the upper part or the top part of the natural gas pipeline 704, and then the pressure guiding pipe 703 is used for connecting and communicating the pressure guiding opening 301 with the valve 902; opening the valve 902 to automatically equalize the pressure in the drip tank 300, the level gauge 303 and the natural gas line 704;
the valve 901 is vertically connected and communicated with the upper part or the top part of the natural gas pipeline 704, and then the regulating valve 306 is connected and communicated with the valve 901 by the medicine conveying pipe 702; opening valve 901 to connect and communicate regulating valve 306 with natural gas line 704;
example 24
Referring to fig. 22, example 22 is repeated except that:
in step 2): the top of the junction pipe 803 is communicated with the valve 902 by screw thread connection, and then the pressure guiding pipe 703 is used for communicating the pressure guiding opening 301 with the valve 902; opening the valve 902 and the cannula valve 802 to automatically balance the pressure in the drip tank 300 and the liquid level meter 303 with the pressure in the cannula 801;
the top of the junction pipe 803 is connected and communicated by a valve 901 through threads, and then the regulating valve 306 is connected and communicated with the valve 901 through a medicine conveying pipe 702; opening a valve 901 to connect and communicate the regulating valve 306 with the sleeve 801;
example 25
Referring to fig. 23, the method for in-situ calibration and adjustment of dosing flow during the dosing process of the gas well surface pipeline by the dosing system of examples 1-20 comprises the following steps:
1) erecting a drip tank:
the drip tank 300 is placed on the stand 701 so that the elevation of the bottom of the drip tank 300 is 2 meters higher than the elevation of the center line of the cannula valve 802;
the bracket 701 is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
the pressure guiding pipe 703 is used for connecting and communicating the pressure guiding port 301 with the oil pipe valve 1004 by screw thread, and the oil pipe valve 1004 is opened, so that the pressure in the drip tank 300 and the liquid level meter 303 is automatically balanced with the pressure in the oil pipe 1001;
the regulating valve 306 is communicated with the ground pipeline 1003 by a drug delivery pipe 702 through threaded connection; opening an oil pipe outlet valve 1002 to connect and communicate the regulating valve 306 with a ground pipeline 1003 and an oil pipe 1001;
3) balancing liquid level:
opening a calibration switch valve 307 to automatically balance the liquid levels in the drip tank 300 and the liquid level meter 303;
4) drip the medicament in the level gauge:
the calibration switch valve 307 is closed, the regulating valve 306 is opened, and the medicament in the liquid level meter 303 sequentially passes through the medicament outlet tee 304, the flow meter 305, the regulating valve 306 and the medicament conveying pipe 702 under the action of gravity and enters the ground pipeline 1003;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter 303 when the timing is started and ended; at the same time, reading the instantaneous flow rate value of the flowmeter 305 at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the scale value of the liquid level meter 303 at the beginning and the end of timing and the known inner diameter of the scale value, and further calculating the medicine discharging flow rate of the liquid level meter within unit time; calculating the average instantaneous flow rate of the flowmeter 305 within the timing time according to the instantaneous flow rate values of the flowmeter 305 at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter 305 in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
The calibration switch valve 307 is opened, the liquid levels in the drip tank 300 and the liquid level meter 303 are automatically balanced, and meanwhile, the medicament in the drip tank 300 enters the ground pipeline 1003 through the medicament outlet pipe 308, the calibration switch valve 307, the medicament outlet tee 304, the flow meter 305, the regulating valve 306 and the medicament delivery pipe 702 in sequence under the action of gravity;
adjusting the opening of the regulator valve 306 and adjusting the dosing flow to the desired dosing flow by calibrating, correcting the instantaneous flow reading of the flow meter 305 according to the in situ calibrated metering error in step 7).
Example 26
Referring to fig. 24, example 25 is repeated except that:
in step 2): firstly, a valve 902 is communicated with a tubing valve 1004, and then a pressure guiding pipe 703 is used for communicating a pressure guiding port 301 with the valve 902; opening the valve 902 and the tubing valve 1004 to automatically balance the pressure in the drip tank 300 and the liquid level meter 303 with the pressure in the tubing 1001;
the valve 901 is firstly connected and communicated with a ground pipeline 1003, and then the regulating valve 306 is connected and communicated with the valve 901 by the medicine conveying pipe 702; opening a valve 901 and an oil pipe outlet valve 1002 to connect and communicate the regulating valve 306 with a ground pipeline 1003 and an oil pipe 1001;
example 27
Referring to fig. 25, the method for in-situ calibration and adjustment of dosing flow during dosing of the oil jacket differential pressure ground line for the dosing system of examples 1-20 comprises the following steps:
1) erecting a drip tank:
the drip tank 300 is placed on the stand 701 such that the elevation of the bottom of the drip tank 300 is 1 meter higher than the elevation of the center line of the cannula valve 802;
the bracket 701 is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
the pressure guiding pipe 703 is used for connecting and communicating the pressure guiding port 301 with the sleeve valve 802 by screw threads, and the sleeve valve 802 is opened, so that the pressure in the drip tank 300 and the liquid level meter 303 is automatically balanced with the pressure in the sleeve 801;
the regulating valve 306 is communicated with the ground pipeline 1003 by a drug delivery pipe 702 through threaded connection; opening an oil pipe outlet valve 1002 to connect and communicate the regulating valve 306 with a ground pipeline 1003 and an oil pipe 1001;
3) balancing liquid level:
opening a calibration switch valve 307 to automatically balance the liquid levels in the drip tank 300 and the liquid level meter 303;
4) drip the medicament in the level gauge:
the calibration switch valve 307 is closed, the regulating valve 306 is opened, and the medicament in the liquid level meter 303 sequentially enters the ground pipeline 1003 through the medicament outlet tee 304, the flow meter 305, the regulating valve 306 and the medicament delivery pipe 702 under the pressure action of the sleeve 801;
known from the knowledge in the art: the pressure of the sleeve 801 of the gas well is larger than the pressure of the oil pipe 1001, and the pressure of the oil pipe 1001 is larger than or equal to the pressure of the ground pipeline 1003.
5) Timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter 303 when the timing is started and ended; at the same time, reading the instantaneous flow rate value of the flowmeter 305 at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the scale value of the liquid level meter 303 at the beginning and the end of timing and the known inner diameter of the scale value, and further calculating the medicine discharging flow rate of the liquid level meter within unit time; calculating the average instantaneous flow rate of the flowmeter 305 within the timing time according to the instantaneous flow rate values of the flowmeter 305 at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter 305 in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
The calibration switch valve 307 is opened, the liquid levels in the drip tank 300 and the liquid level meter 303 are automatically balanced, and meanwhile, the medicament in the drip tank 300 enters the ground pipeline 1003 through the medicament outlet pipe 308, the calibration switch valve 307, the medicament outlet tee 304, the flow meter 305, the regulating valve 306 and the medicament delivery pipe 702 in sequence under the pressure action of the sleeve 801;
adjusting the opening of the regulator valve 306 and adjusting the dosing flow to the desired dosing flow by calibrating, correcting the instantaneous flow reading of the flow meter 305 according to the in situ calibrated metering error in step 7).
Example 28
Referring to fig. 26, example 25 is repeated except that:
in step 2):
firstly, a valve 902 is communicated with a sleeve valve 802, and then a pressure guiding pipe 703 is used for communicating a pressure guiding opening 301 with the valve 902; opening the valve 902 and the cannula valve 802 to automatically balance the pressure in the drip tank 300 and the liquid level meter 303 with the pressure in the cannula 801;
the valve 901 is connected and communicated with the ground pipeline 1003, and then the medicine conveying pipe 702 is used for connecting and communicating the regulating valve 306 with the ground pipeline 1003 by screw threads; opening a valve 901 and an oil pipe outlet valve 1002 to connect and communicate the regulating valve 306 with a ground pipeline 1003 and an oil pipe 1001;
example 29
Referring to fig. 27, the method for adjusting the dosing flow rate of the dosing system of examples 1-20 in the in-situ calibration during the dosing process of the oil well casing comprises the following steps:
1) erecting a drip tank:
the drip tank 300 is placed on the stand 701 such that the elevation at the bottom of the drip tank 300 is 1.6 meters higher than the elevation of the centerline of the cannula valve 1102;
the bracket 701 is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
connecting and communicating a junction pipe 1103 with one closed end with an oil well casing valve 1102 by using pipe threads;
the top of a pressure guiding port 301 and the top of a DN50 junction pipe 1103 are connected and communicated by threads by using a pressure guiding pipe 703, and an oil well casing valve 1102 is opened, so that the pressure in the drip tank 300 and the liquid level meter 303 is automatically balanced with the pressure in the oil well casing 1101;
the regulating valve 306 is communicated with the junction pipe 1103 by a drug delivery pipe 702 through threaded connection;
3) balancing liquid level:
opening a calibration switch valve 307 to automatically balance the liquid levels in the drip tank 300 and the liquid level meter 303;
4) drip the medicament in the level gauge:
the calibration switch valve 307 is closed, the regulating valve 306 is opened, and the medicament in the liquid level meter 303 sequentially passes through the medicament outlet tee 304, the flow meter 305, the regulating valve 306, the medicament conveying pipe 702, the junction pipe 1103 and the oil well casing valve 1102 and enters the oil well casing 1101 under the action of gravity;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter 303 when the timing is started and ended; at the same time, reading the instantaneous flow rate value of the flowmeter 305 at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the scale value of the liquid level meter 303 at the beginning and the end of timing and the known inner diameter of the scale value, and further calculating the medicine discharging flow rate of the liquid level meter within unit time; calculating the average instantaneous flow rate of the flowmeter 305 within the timing time according to the instantaneous flow rate values of the flowmeter 305 at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter 305 in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening the calibration switch valve 307, automatically balancing the liquid level in the drip tank 300 and the liquid level meter 303, and simultaneously enabling the medicament in the drip tank 300 to sequentially pass through the medicament outlet pipe 308, the calibration switch valve 307, the medicament outlet tee 304, the flow meter 305, the regulating valve 306, the medicament conveying pipe 702, the junction pipe 1103 and the oil well casing valve 1102 to enter the oil well casing 1101 under the action of gravity;
adjusting the opening of the regulator valve 306 and adjusting the dosing flow to the desired dosing flow by calibrating, correcting the instantaneous flow reading of the flow meter 305 according to the in situ calibrated metering error in step 7).
Example 30
Example 29 was repeated with the difference that:
in step 2):
the valve 902 is communicated with the top or upper part of the junction pipe 1103, and then the pressure guiding pipe 703 is used for communicating the pressure guiding port 301 with the valve 902; opening the valve 902 and the well casing valve 1102 to automatically balance the pressure in the drip tank 300 and the liquid level meter 303 with the pressure in the well casing 1101;
the valve 901 is communicated with the junction pipe 1103 firstly, and then the regulating valve 306 is communicated with the valve 901 through thread connection by the medicine conveying pipe 702; opening valve 901 to connect and communicate regulator valve 306 with well casing 1101;
known from the knowledge in the art: natural gas is in the oil well casing.
The terms "upper," "lower," "left," "right," and the like as used herein to describe the orientation of the components are based on the orientation as shown in the figures of the drawings for convenience of description, and in actual systems, the orientation may vary depending on the manner in which the system is arranged.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes or variations led out by the technical scheme of the utility model are still in the protection scope of the utility model.
Claims (36)
1. A medicine feeding system for in-situ calibration and adjustment of medicine feeding amount is characterized in that: comprises a drip tank, a pressure leading port, a gas communicating pipe, a liquid level meter, a medicine outlet tee joint, a flow meter, an adjusting valve, a calibration switch valve and a medicine outlet pipe;
the top of the drip tank is provided with a pressure guide port;
the bottom of the drip irrigation tank is communicated with one end of the medicine outlet pipe;
a calibration switch valve is arranged on the medicine outlet pipe, and the other end of the medicine outlet pipe is communicated with a side interface of the medicine outlet tee;
the upper port of the medicine outlet tee is communicated with the bottom port of the liquid level meter;
the top interface of the liquid level meter is communicated with one end of a gas communicating pipe, and the other end of the gas communicating pipe is communicated with the top of the drip tank;
the lower port of the medicine outlet tee is communicated with the inlet of the flowmeter;
the outlet of the flowmeter is communicated with the regulating valve;
the elevation of the top of the liquid level meter is equal to or higher than the elevation of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is equal to or lower than the elevation of the bottom of the drip irrigation tank.
2. The system of claim 1, wherein the system further comprises: the lower port of the medicine outlet tee is communicated with the regulating valve; the regulating valve is communicated with the inlet of the flowmeter.
3. The system of claim 1, wherein the system further comprises: the side surface of the lower part of the drip tank is communicated with one end of the medicine outlet pipe; the other end of the gas communicating pipe is communicated with the side surface of the upper part of the drip tank; the elevation of the top of the liquid level meter is lower than that of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is higher than that of the bottom of the drip irrigation tank.
4. A system for calibrating and adjusting the amount of a drug to be added in situ according to claim 1 or 2, wherein: the flowmeter is any one of a gear flowmeter, a rotor flowmeter, an ultrasonic flowmeter, an external clamp type ultrasonic flowmeter, a portable ultrasonic flowmeter, an electromagnetic flowmeter, a float flowmeter, a water meter, an amoebic flowmeter, a bent pipe flowmeter, a balance flowmeter, a wedge flowmeter, a target flowmeter, a vortex flowmeter, a turbine flowmeter, a pore plate flowmeter, a vortex flowmeter and a differential pressure flowmeter.
5. A system for calibrating and adjusting the amount of a drug to be added in situ according to claim 1 or 3, wherein: the flowmeter is any one of a gear flowmeter, a rotor flowmeter, an ultrasonic flowmeter, an external clamp type ultrasonic flowmeter, a portable ultrasonic flowmeter, an electromagnetic flowmeter, a float flowmeter, a water meter, an amoebic flowmeter, a bent pipe flowmeter, a balance flowmeter, a wedge flowmeter, a target flowmeter, a vortex flowmeter, a turbine flowmeter, a pore plate flowmeter, a vortex flowmeter and a differential pressure flowmeter.
6. A system for calibrating and adjusting the amount of a drug to be added in situ according to claim 1 or 3, wherein: the liquid level meter is any one of a magnetic turning plate liquid level meter, a magnetic floater type liquid level meter, a magnetic sensitive electronic double-color liquid level meter, a glass tube liquid level meter, a glass plate type liquid level meter, a color quartz tube type liquid level meter, a sight glass type liquid level meter and an ultrasonic liquid level meter.
7. A system for calibrating and adjusting the amount of a drug to be added in situ according to claim 1 or 3, wherein: the liquid level meter is a remote transmission type magnetic floater type liquid level meter which is manufactured by utilizing a buoyancy principle, a magnetic coupling effect, a sensor, a transmitter and a display instrument.
8. A system for calibrating and adjusting the amount of a drug to be added in situ according to claim 1 or 3, wherein: the liquid level meter comprises a shell with a flange, a magnetic floating ball liquid level transmitter with a flange, an upper interface and a bottom interface; the lower end of the magnetic floating ball liquid level transmitter extends to the lower part in the shell, and the upper end of the magnetic floating ball liquid level transmitter is connected with a flange at the top of the shell; the magnetic floating ball liquid level transmitter can convert the liquid level into a standard electric signal and transmit the standard electric signal remotely.
9. A system for calibrating and adjusting the amount of a drug to be added in situ according to claim 1 or 3, wherein: the liquid level meter comprises a threaded shell, a threaded static pressure type liquid level transmitter, an upper interface and a bottom interface, wherein the lower end of the static pressure type liquid level transmitter extends to the lower part in the shell, and the upper part of the static pressure type liquid level transmitter is in threaded connection with the top of the shell; the static pressure type liquid level transmitter is a magnetostrictive liquid level transmitter; the static pressure type liquid level transmitter can convert the liquid level into a standard electric signal and transmit the signal remotely.
10. A system for calibrating and adjusting the amount of a drug to be added in situ according to claim 1 or 3, wherein: the liquid level meter comprises a shell, a pressure transmitter, an upper interface and a bottom interface, wherein the pressure transmitter is arranged at the lower part of the shell; the pressure transmitter can convert the liquid level into a standard electric signal and transmit the standard electric signal remotely.
11. A system for calibrating and adjusting the amount of a drug to be added in situ according to claim 1 or 3, wherein: the liquid level meter comprises a shell, a pressure gauge, a top connector and a bottom connector, wherein the pressure gauge is arranged at the lower part of the shell; the pressure gauge is a precision pressure gauge with 0.1-level precision.
12. A system for calibrating and adjusting the amount of a drug to be added in situ according to claim 1 or 3, wherein: the liquid level meter comprises a shell, a magnetic float, a top interface, colored iron powder and a bottom interface, wherein the magnetic float is arranged in the shell, and the colored iron powder is arranged outside the shell and at a position corresponding to the magnetic float.
13. A system for calibrating and adjusting the amount of a drug to be added in situ according to claim 1 or 3, wherein: the drip tank is a closed container or/and a pressure container.
14. A medicine feeding system for in-situ calibration and adjustment of medicine feeding amount is characterized in that: comprises a drip tank, a pressure leading port, a gas communicating pipe, a liquid level meter, a connecting pipe fitting, a flowmeter, an adjusting valve, a calibration switch valve and a medicine outlet pipe;
the side surface of the lower part of the drip tank is communicated with one end of the medicine outlet pipe;
the other end of the medicine outlet pipe is communicated with a side interface at the lower part of the liquid level meter;
the side interface at the upper part of the liquid level meter is communicated with one end of a gas communicating pipe, and the other end of the gas communicating pipe is communicated with the side surface at the upper part of the drip tank;
the bottom interface of the liquid level meter is communicated with one end of the connecting pipe fitting;
the other end of the connecting pipe fitting is communicated with an inlet of the flowmeter;
the elevation of the top of the liquid level meter is equal to or higher than the elevation of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is equal to or lower than the elevation of the bottom of the drip irrigation tank.
15. The system of claim 14, wherein the system further comprises: the lower port of the medicine outlet tee is communicated with the regulating valve; the regulating valve is communicated with the inlet of the flowmeter.
16. The system of claim 15, wherein the system further comprises: the bottom of the drip irrigation tank is communicated with one end of the medicine outlet pipe.
17. A system according to claim 14 or 15 for in situ calibration and adjustment of dosing, wherein: the flowmeter is any one of a gear flowmeter, a rotor flowmeter, an ultrasonic flowmeter, an external clamp type ultrasonic flowmeter, a portable ultrasonic flowmeter, an electromagnetic flowmeter, a float flowmeter, a water meter, an amoebic flowmeter, a bent pipe flowmeter, a balance flowmeter, a wedge flowmeter, a target flowmeter, a vortex flowmeter, a turbine flowmeter, a pore plate flowmeter, a vortex flowmeter and a differential pressure flowmeter.
18. A system according to claim 14 or 15 for in situ calibration and adjustment of dosing, wherein: the liquid level meter is any one of a magnetic turning plate liquid level meter, a magnetic floater type liquid level meter, a magnetic sensitive electronic double-color liquid level meter, a glass tube liquid level meter, a glass plate type liquid level meter, a color quartz tube type liquid level meter, a sight glass type liquid level meter and an ultrasonic liquid level meter.
19. A system according to claim 14 or 15 for in situ calibration and adjustment of dosing, wherein: the liquid level meter is a remote transmission type magnetic floater type liquid level meter which is manufactured by utilizing a buoyancy principle, a magnetic coupling effect, a sensor, a transmitter and a display instrument.
20. A system according to claim 14 or 15 for in situ calibration and adjustment of dosing, wherein: the liquid level meter comprises a shell with a flange, a magnetic floating ball liquid level transmitter with a flange, an upper interface and a bottom interface; the lower end of the magnetic floating ball liquid level transmitter extends to the lower part in the shell, and the upper end of the magnetic floating ball liquid level transmitter is connected with a flange at the top of the shell; the magnetic floating ball liquid level transmitter can convert the liquid level into a standard electric signal and transmit the standard electric signal remotely.
21. A system according to claim 14 or 15 for in situ calibration and adjustment of dosing, wherein: the liquid level meter comprises a threaded shell, a threaded static pressure type liquid level transmitter, an upper interface and a bottom interface, wherein the lower end of the static pressure type liquid level transmitter extends to the lower part in the shell, and the upper part of the static pressure type liquid level transmitter is in threaded connection with the top of the shell; the static pressure type liquid level transmitter is a magnetostrictive liquid level transmitter; the static pressure type liquid level transmitter can convert the liquid level into a standard electric signal and transmit the signal remotely.
22. A system according to claim 14 or 15 for in situ calibration and adjustment of dosing, wherein: the liquid level meter comprises a shell, a pressure transmitter, an upper interface and a bottom interface, wherein the pressure transmitter is arranged at the lower part of the shell; the pressure transmitter can convert the liquid level into a standard electric signal and transmit the standard electric signal remotely.
23. A system according to claim 14 or 15 for in situ calibration and adjustment of dosing, wherein: the liquid level meter comprises a shell, a pressure gauge, a top connector and a bottom connector, wherein the pressure gauge is arranged at the lower part of the shell; the pressure gauge is a precision pressure gauge with 0.1-level precision.
24. A system according to claim 14 or 15 for in situ calibration and adjustment of dosing, wherein: the liquid level meter comprises a shell, a magnetic float, a top interface, colored iron powder and a bottom interface, wherein the magnetic float is arranged in the shell, and the colored iron powder is arranged outside the shell and at a position corresponding to the magnetic float.
25. A system according to claim 14 or 15 for in situ calibration and adjustment of dosing, wherein: the drip tank is a closed container or/and a pressure container.
26. A medicine feeding system for in-situ calibration and adjustment of medicine feeding amount is characterized in that: comprises a drip tank, a pressure leading port, a gas communicating pipe, a liquid level meter, a connecting pipe fitting, a flowmeter, an adjusting valve, a calibration switch valve, a medicine outlet pipe, a medicine supplementing port, a standby port, a vent port, a safety valve and a pressure gauge;
the pressure leading port is provided with a flange;
the top of the drip tank is provided with a vent, a safety valve and a pressure gauge;
the vent with the flange is communicated with the top of the drip tank, the safety valve is communicated with the drip tank, and the pressure gauge is communicated with the top of the drip tank;
the bottom of the drip irrigation tank is communicated with one end of a medicine outlet pipe, and the other end of the medicine outlet pipe is communicated with a side interface at the lower part of the liquid level meter;
the bottom interface of the liquid level meter is communicated with the connecting pipe fitting;
the connecting pipe fitting is communicated with an inlet of the flowmeter;
the inlet of the flowmeter is communicated with the regulating valve;
the other end of the gas communicating pipe is communicated with the top of the drip tank;
the medicine supplementing port is communicated with the bottom of the drip irrigation tank, and the standby port is communicated with the bottom of the drip irrigation tank;
the elevation of the top of the liquid level meter is equal to or higher than the elevation of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is equal to or lower than the elevation of the bottom of the drip irrigation tank.
27. The system of claim 26, wherein the system further comprises: the connecting pipe fitting is communicated with the regulating valve; the regulating valve is communicated with the inlet of the flowmeter.
28. The system of claim 26, wherein the system further comprises: the flowmeter is any one of a gear flowmeter, a rotor flowmeter, an ultrasonic flowmeter, an external clamp type ultrasonic flowmeter, a portable ultrasonic flowmeter, an electromagnetic flowmeter, a float flowmeter, a water meter, an amoebic flowmeter, a bent pipe flowmeter, a balance flowmeter, a wedge flowmeter, a target flowmeter, a vortex flowmeter, a turbine flowmeter, a pore plate flowmeter, a vortex flowmeter and a differential pressure flowmeter.
29. The system of claim 26, wherein the system further comprises: the liquid level meter is any one of a magnetic turning plate liquid level meter, a magnetic floater type liquid level meter, a magnetic sensitive electronic double-color liquid level meter, a glass tube liquid level meter, a glass plate type liquid level meter, a color quartz tube type liquid level meter, a sight glass type liquid level meter and an ultrasonic liquid level meter.
30. The system of claim 26, wherein the system further comprises: the liquid level meter is a remote transmission type magnetic floater type liquid level meter which is manufactured by utilizing a buoyancy principle, a magnetic coupling effect, a sensor, a transmitter and a display instrument.
31. The system of claim 26, wherein the system further comprises: the liquid level meter comprises a shell with a flange, a magnetic floating ball liquid level transmitter with a flange, an upper interface and a bottom interface; the lower end of the magnetic floating ball liquid level transmitter extends to the lower part in the shell, and the upper end of the magnetic floating ball liquid level transmitter is connected with a flange at the top of the shell; the magnetic floating ball liquid level transmitter can convert the liquid level into a standard electric signal and transmit the standard electric signal remotely.
32. The system of claim 26, wherein the system further comprises: the liquid level meter comprises a threaded shell, a threaded static pressure type liquid level transmitter, an upper interface and a bottom interface, wherein the lower end of the static pressure type liquid level transmitter extends to the lower part in the shell, and the upper part of the static pressure type liquid level transmitter is in threaded connection with the top of the shell; the static pressure type liquid level transmitter is a magnetostrictive liquid level transmitter; the static pressure type liquid level transmitter can convert the liquid level into a standard electric signal and transmit the signal remotely.
33. The system of claim 26, wherein the system further comprises: the liquid level meter comprises a shell, a pressure transmitter, an upper interface and a bottom interface, wherein the pressure transmitter is arranged at the lower part of the shell; the pressure transmitter can convert the liquid level into a standard electric signal and transmit the standard electric signal remotely.
34. The system of claim 26, wherein the system further comprises: the liquid level meter comprises a shell, a pressure gauge, a top connector and a bottom connector, wherein the pressure gauge is arranged at the lower part of the shell; the pressure gauge is a precision pressure gauge with 0.1-level precision.
35. The system of claim 26, wherein the system further comprises: the liquid level meter comprises a shell, a magnetic float, a top interface, colored iron powder and a bottom interface, wherein the magnetic float is arranged in the shell, and the colored iron powder is arranged outside the shell and at a position corresponding to the magnetic float.
36. The system of claim 26, wherein the system further comprises: the drip tank is a closed container or/and a pressure container.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061704A (en) * | 2021-10-30 | 2022-02-18 | 华能洛阳热电有限责任公司 | Remote automatic calibration device for magnetic turning plate liquid level meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061704A (en) * | 2021-10-30 | 2022-02-18 | 华能洛阳热电有限责任公司 | Remote automatic calibration device for magnetic turning plate liquid level meter |
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Effective date of registration: 20220810 Address after: Room 502, Unit 2, Building 42, West Shencai Community, Gaosheng Street, Xinglongtai District, Panjin City, Liaoning Province 124000 Patentee after: Li Chengxian Address before: 204, building 1, Shuitun village south, Chengnan street, Changping District, Beijing Patentee before: BEIJING HAOBO WANWEI TECHNOLOGY Co.,Ltd. |
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