CN111256782B - A measure servo level gauge for oil tank - Google Patents
A measure servo level gauge for oil tank Download PDFInfo
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- CN111256782B CN111256782B CN202010093094.7A CN202010093094A CN111256782B CN 111256782 B CN111256782 B CN 111256782B CN 202010093094 A CN202010093094 A CN 202010093094A CN 111256782 B CN111256782 B CN 111256782B
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- China
- Prior art keywords
- oil tank
- liquid level
- oil
- traction
- floater
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/40—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements
- G01F23/44—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements using electrically actuated indicating means
- G01F23/446—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements using electrically actuated indicating means using opto-electrically actuated indicating means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/48—Arrangements of indicating or measuring devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/40—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements
- G01F23/44—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements using electrically actuated indicating means
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The invention relates to the technical field of liquid level measurement, and discloses a measurement servo liquid level meter for an oil tank, which comprises the oil tank and a vertical steel pipe, wherein the vertical steel pipe is vertically and fixedly arranged in the oil tank, a large amount of oil is filled in the oil tank, the oil tank is not filled with the oil, and through holes which are uniformly distributed are formed in the vertical steel pipe. Through the setting of activity float and signal receiver, make laser sensor can real-time measurement fluid the surface to the distance of tank deck, and with signal transmission external, and laser sensor is measuring the length within several meters, its precision can reach. micron, the measurement accuracy of very big improvement level gauge, and through the setting of two sets of laser sensor on the activity float, make and get the mean value through two sets of data of simultaneous measurement, the measurement accuracy of further improved level gauge, the liquid level that effectively prevents simultaneously the business turn over of fluid in the oil tank and cause fluctuates and drive signal receiver and rock, and then reduce liquid level height measurement's error.
Description
Technical Field
The invention relates to the technical field of liquid level measurement, in particular to a measurement servo liquid level meter for an oil tank.
Background
At present, the oil tank and spherical tank of domestic oil refinery mostly adopt the following instrument liquid level meters: the servo liquid level meter is generally composed of a stepping motor, a magnetic coupling disc, a hub, a steel wire, a floater, a force sensor and a corresponding electronic circuit, and the principle is that the floater, the hub, the force sensor and the like form a force balance rotation system, the floater can move up and down under the driving of the stepping motor, torque generated by the gravity of the floater reacts on the force sensor, and the reaction force generated by the force sensor is different due to different buoyancy of the floater under different density media, so that the position of the floater can be determined to be in the air, on the liquid level (liquid level position) or on the interface (liquid interface) by measuring the magnitude of the reaction force, the actual position of the floater is obtained by measuring the step number of the stepping motor, but the practical position of the floater has some defects, the following were used:
the servo liquid level meter depends on the thread groove on the hub, when the steel wire enters the thread groove and is positioned by the thread of the steel wire, the moving distance of the floater must be completely consistent every step of the stepping motor, otherwise, an error is generated, therefore, the servo liquid level meter has high requirements on the machining precision of the wheel hub, the stepping motor and the corresponding transmission mechanism, so that the machining cost is high, and the stepping motor moves the float up and down by about 10mm per rotation, and each rotation is divided into 200 steps, therefore, each step is equivalent to 0.05mm, so that the measurement accuracy of the liquid level meter is greatly limited, and the servo liquid level meter needs to change the counterforce applied to the floater through the force sensor to determine the oil liquid height and the oil-water separation height, so that the position of the floater in the oil liquid can be determined, the online heights of the floater and the oil liquid can not be detected simultaneously in real time, and the information of the oil liquid in the oil tank can not be provided timely.
Disclosure of Invention
The invention provides a measuring servo liquid level meter for an oil tank, which has the advantages of split measurement of the height of oil liquid and the height of oil-water separation, and high accuracy of the height of the oil liquid, and solves the problems in the background art.
The invention provides the following technical scheme: a measurement servo liquid level meter for an oil tank comprises the oil tank and a vertical steel pipe, wherein the vertical steel pipe is vertically and fixedly installed in the oil tank, a large amount of oil is poured into the oil tank, the oil tank is not filled with the oil, through holes which are uniformly distributed are formed in the vertical steel pipe, a movable floater is sleeved on the vertical steel pipe and located in the oil tank, a signal receiver is fixedly installed on the upper surface of the oil tank, a liquid level meter shell is fixedly installed on the upper surface of the oil tank and right above the vertical steel pipe, a CPU is fixedly installed on the right side in the liquid level meter shell, a servo motor is fixedly installed in the liquid level meter shell and located on the left side of the CPU, a hub is fixedly connected to the left end of the servo motor, a Hall sensor is fixedly installed in the hub, a traction belt is wound on the hub, and a traction floater is fixedly connected to the, and a contact exciter is fixedly mounted on the shell of the liquid level meter under the hub, the traction belt is movably clamped with the contact exciter, and the right end of the contact exciter is fixedly connected with a counter.
Preferably, two movable grooves are formed in the vertical steel pipe, each movable float comprises a floating body and a laser sensor, the floating bodies are movably clamped with the movable grooves, the buoyancy of the floating bodies in oil is larger than the sum of the gravity of the floating bodies and the gravity of the laser sensors, and the two laser sensors are respectively, uniformly and symmetrically and fixedly installed on the upper surface of the floating body.
Preferably, the traction belt is divided into two parts, namely a triggering section and a connecting section, the triggering section is located on the upper portion and is composed of a steel belt, hollow trapezoidal protrusions distributed in an array mode are arranged on one side of the steel belt and movably clamped with the contact exciter, one end of the triggering section is fixedly connected with the hub, the connecting section is located on the lower portion and is composed of steel wires, and the bottom end of the connecting section is fixedly connected with the traction floater.
Preferably, the contact exciter includes the fixed clamp body, the middle part activity joint of the fixed clamp body has the movable rod, the right end upper surface and the bottom surface of movable rod respectively fixed mounting have the contact, the inside bottom surface fixed mounting of the fixed clamp body has the contact that rises, the inside last fixed surface of the fixed clamp body installs the decline contact.
Preferably, the gravity of the traction floater minus the traction force of the traction belt to the traction floater is larger than the buoyancy of the oil to the traction floater and smaller than the buoyancy of the water to the traction floater.
The invention has the following beneficial effects:
1. through the setting of activity float and signal receiver, make laser sensor can real-time measurement fluid the surface to the distance of tank deck, and with signal transmission external, and laser sensor is measuring the length within several meters, its precision can reach. micron, the measurement accuracy of very big improvement level gauge, and through the setting of two sets of laser sensor on the activity float, make and get the mean value through two sets of data of simultaneous measurement, the measurement accuracy of further improved level gauge, the liquid level that effectively prevents simultaneously the business turn over of fluid in the oil tank and cause fluctuates and drive signal receiver and rock, and then reduce liquid level height measurement's error.
2. Through the setting of activity float and traction float for carry out online monitoring simultaneously to the fluid height in the oil tank and water oil separating liquid level height, security when guaranteeing the use of fluid in the oil tank prevents that fluid from drawing excessively, causes a large amount of separation water to be extracted, and then influences the safety in utilization of external instrument.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the point C in FIG. 1;
FIG. 3 is a side view of the assembly of the draft strap and counter of the present invention;
FIG. 4 is a schematic top view of the installation of the vertical steel tube and the movable float in the present invention;
FIG. 5 is a schematic structural control diagram according to the present invention.
In the figure: 1. an oil tank; 2. a vertical steel pipe; 3. a movable float; 31. a float; 32. a laser sensor; 4. a signal receiver; 5. a gauge housing; 6. a CPU; 7. a servo motor; 8. a hub; 9. a traction belt; 10. a contact actuator; 101. fixing the clamp body; 102. a movable rod; 103. a rising contact; 104. a descending contact; 11. a counter; 12. pulling the float; A. oil level height; B. the height of the oil-water separation liquid level.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, a measuring servo liquid level meter for an oil tank comprises an oil tank 1 and a vertical steel pipe 2, wherein the vertical steel pipe 2 is vertically and fixedly installed inside the oil tank 1, a large amount of oil is filled inside the oil tank 1, the oil tank 1 is not filled with the oil, through holes are uniformly distributed on the vertical steel pipe 2, the oil can enter inside the vertical steel pipe 2, a movable float 3 is sleeved on the vertical steel pipe 2 and positioned inside the oil tank 1, a signal receiver 4 is fixedly installed on the upper surface of the oil tank 1, a liquid level meter shell 5 is fixedly installed on the upper surface of the oil tank 1 and right above the vertical steel pipe 2, a CPU6 is fixedly installed on the right side inside the liquid level meter shell 5, a servo motor 7 is fixedly installed inside the liquid level meter shell 5 and positioned on the left side of a CPU6, a hub 8 is fixedly connected to the left end of the servo motor 7, and, the wheel hub 8 is wound with a traction belt 9, the bottom end of the traction belt 9 is fixedly connected with a traction floater 12, a contact exciter 10 is fixedly mounted on the liquid level meter shell 5 and is located right below the wheel hub 8, the traction belt 9 is movably connected with the contact exciter 10 in a clamping mode, and the right end of the contact exciter 10 is fixedly connected with a counter 11.
Wherein, two movable grooves are arranged on the vertical steel pipe 2, the movable floater 3 comprises a floating body 31 and a laser sensor 32, the floating body 31 is movably clamped with the movable grooves, the movable float 3 can be lifted and lowered along with the lifting of the oil level, the shaking of the movable float 3 is reduced, the accurate value measured by the laser sensor 32 is increased, the buoyancy of the floating body 31 in the oil is larger than the sum of the gravity of the floating body 31 and the gravity of the laser sensor 32, so that the movable float 3 always floats on the oil level, the height of the oil liquid level is detected in real time, two laser sensors 32 are respectively and uniformly and symmetrically fixedly arranged on the upper surface of the floating body 31, two sets of simultaneous measurement are carried out to the distance between oil liquid level and the tank deck, get the average value, and the liquid level that the business turn over of the oil liquid in the oil tank caused is undulant and drive signal receiver 4 and rock is prevented effectively, and then reduces liquid level height measurement's error.
Wherein, the traction belt 9 divides into two parts and is trigger section and linkage segment respectively, the trigger section is located upper portion, and constitute by the steel band, hollow trapezoidal arch that is the array distribution is seted up to one side of steel band, hollow trapezoidal arch and contact energizer 10 activity joint, the one end and the wheel hub 8 fixed connection of trigger section, it can twine on wheel hub 8, and hollow arch can superpose, reduce the thickness when twining on wheel hub 8, the linkage segment is located the lower part, and constitute by the steel wire, the bottom and the floater 12 fixed connection that draws of linkage segment, be used for connecting and draw floater 12 and trigger section, reduce the winding thickness of traction belt 9 on wheel hub 8, and reduce the running resistance of drawing floater 12 in fluid.
The contact exciter 10 comprises a fixed clamp body 101, a movable rod 102 is movably clamped in the middle of the fixed clamp body 101, contacts are respectively and fixedly mounted on the upper surface and the bottom surface of the right end of the movable rod 102, a lifting contact 103 is fixedly mounted on the bottom surface inside the fixed clamp body 101, a descending contact 104 is fixedly mounted on the upper surface inside the fixed clamp body 101, when the traction floater 12 ascends and descends along with the oil-water separation liquid level, the force of the traction belt 9 on the hub 8 changes, and is further transmitted to the CPU6 through the Hall sensor of the hub 8, the servo motor 7 is triggered by the CPU6 to drive the hub 8 to rotate, the traction belt 9 is retracted, the traction belt 9 is made to be in contact with the contact exciter 10, the contacts are triggered, the counter 11 starts to count, and accordingly changes of the oil-water liquid level are judged.
Wherein, the gravity of the traction floater 12 minus the traction force of the traction belt 9 to the traction floater 12 is larger than the buoyancy of the oil liquid to the traction floater 12 and smaller than the buoyancy of the water to the traction floater 12, so that the traction floater 12 is just above the oil-water separation liquid level.
Working principle, oil level height measurement: the movable floater 3 is sleeved outside the vertical steel pipe 2, floats on the surface of oil by buoyancy, vertically ascends and descends along with the ascending and descending of the height of the oil liquid level, and simultaneously measures the distance from the movable floater to the top of the oil tank by using a laser sensor arranged on the movable floater, so as to detect the height of the oil liquid level, the sensor transmits a signal to the signal receiver 4, and the signal receiver 4 transmits the signal to the CPU6, so that the measurement of the height of the oil liquid level is completed;
measuring the height of the oil-water separation liquid level: put into vertical steel pipe 2 inside and sink in fluid with drawing float 12, be in oil-water separation department, draw by traction band 9, when oil-water separation liquid level rose, drive and draw float 12 and traction band 9 come-up, the power that wheel hub 8 received reduces, hall sensor detects the change of power, and with signal transmission to CPU6 in, and trigger servo motor 7 through CPU6 and drive wheel hub 8 and begin to rotate, draw and restraint to traction band 9, make traction band 9 and contact energizer 10 contact, trigger the contact, and make counter 11 begin to count, with this change of judging oil-water liquid level.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a measure servo level gauge for oil tank, includes oil tank (1) and vertical steel pipe (2), vertical steel pipe (2) vertical fixation installs in the inside of oil tank (1), the inside of oil tank (1) is filled with a large amount of fluid, fluid is not full of oil tank (1), its characterized in that: the steel tank is characterized in that uniformly distributed through holes are formed in the vertical steel pipe (2), the movable floater (3) is sleeved in the vertical steel pipe (2) and located in the oil tank (1), the signal receiver (4) is fixedly arranged on the upper surface of the oil tank (1), a liquid level meter shell (5) is fixedly arranged on the upper surface of the oil tank (1) and right above the vertical steel pipe (2), a CPU (6) is fixedly arranged on the right side of the interior of the liquid level meter shell (5), a servo motor (7) is fixedly arranged on the left side of the CPU (6) in the interior of the liquid level meter shell (5), a hub (8) is fixedly connected with the left end of the servo motor (7), a Hall sensor is fixedly arranged in the interior of the hub (8), a traction belt (9) is wound on the hub (8), and a traction floater (12) is fixedly connected with the bottom end of the traction belt (9, the liquid level meter is characterized in that a contact exciter (10) is fixedly mounted on the liquid level meter shell (5) and is located under the wheel hub (8), the traction belt (9) is movably clamped with the contact exciter (10), and the right end of the contact exciter (10) is fixedly connected with a counter (11).
2. A measuring servo level gauge for a tank, according to claim 1, characterized in that: two movable grooves are formed in the vertical steel pipe (2), the movable floater (3) comprises a floating body (31) and a laser sensor (32), the floating body (31) is movably clamped with the movable grooves, the buoyancy of the floating body (31) in oil is larger than the sum of the gravity of the floating body (31) and the gravity of the laser sensor (32), and the two laser sensors (32) are respectively and uniformly and symmetrically fixedly installed on the upper surface of the floating body (31).
3. A measuring servo level gauge for a tank, according to claim 1, characterized in that: traction belt (9) divide into two parts and are trigger section and linkage segment respectively, trigger the section and lie in upper portion, and constitute by the steel band, hollow trapezoidal arch that is the array distribution is seted up to one side of steel band, hollow trapezoidal arch and contact energizer (10) activity joint, the one end and wheel hub (8) fixed connection of trigger the section, the linkage segment is located the lower part, and comprises the steel wire, the bottom of linkage segment with pull float (12) fixed connection.
4. A measuring servo level gauge for a tank, according to claim 1, characterized in that: contact energizer (10) are including the fixed clamp body (101), the middle part activity joint of the fixed clamp body (101) has movable rod (102), the right-hand member upper surface and the bottom surface of movable rod (102) respectively fixed mounting have the contact, the inside bottom surface fixed mounting of fixed clamp body (101) has ascending contact (103), the inside last fixed surface of fixed clamp body (101) installs descending contact (104).
5. A measuring servo level gauge for a tank, according to claim 1, characterized in that: the gravity of the traction floater (12) minus the traction force of the traction belt (9) on the traction floater (12) is larger than the buoyancy of the oil liquid on the traction floater (12) and smaller than the buoyancy of the water on the traction floater (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010093094.7A CN111256782B (en) | 2020-02-14 | 2020-02-14 | A measure servo level gauge for oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010093094.7A CN111256782B (en) | 2020-02-14 | 2020-02-14 | A measure servo level gauge for oil tank |
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| Publication Number | Publication Date |
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| CN111256782A CN111256782A (en) | 2020-06-09 |
| CN111256782B true CN111256782B (en) | 2020-12-22 |
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| CN202010093094.7A Active CN111256782B (en) | 2020-02-14 | 2020-02-14 | A measure servo level gauge for oil tank |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113120452B (en) * | 2021-04-06 | 2022-08-23 | 杭州数计信息技术有限公司 | Oil tank liquid level detection device based on laser rangefinder |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5299141A (en) * | 1989-12-22 | 1994-03-29 | American Sigma, Inc. | Automatic fluid monitoring and sampling apparatus and method |
| US5999101A (en) * | 1995-12-26 | 1999-12-07 | Gallagher; Daniel J. | Liquid level alarm system |
| CN2636207Y (en) * | 2003-08-07 | 2004-08-25 | 范明军 | Servo type level meter |
| DE10361884B3 (en) * | 2003-12-19 | 2005-08-11 | Siemens Ag | Apparatus and method for monitoring a gas volume in a liquid-filled plant |
| CN201344825Y (en) * | 2008-07-22 | 2009-11-11 | 天津北科精工自动化科技发展有限责任公司 | Automatic material level detection device for oil shale dry distillation tower |
| CN101334307B (en) * | 2008-08-06 | 2010-07-14 | 范明军 | Servo- type level meter |
| CN202119508U (en) * | 2011-03-08 | 2012-01-18 | 武汉长澳大地工程有限公司 | Intelligent large-range displacement sensor and water level and valve position measuring device |
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Effective date of registration: 20210714 Address after: 163000 No.68, Wanda Plaza, 154 Wanda pedestrian street, 15 Dongfeng Road, Saertu District, Daqing City, Heilongjiang Province Patentee after: Daqing Weirong Technology Co.,Ltd. Address before: Group 2, Yong'an village, Haiqing Township, Fuyuan City, Jiamusi City, Heilongjiang Province, 156500 Patentee before: Sun Shufang |