CN213515892U

CN213515892U - Combined steel belt liquid level meter capable of correcting by self weight

Info

Publication number: CN213515892U
Application number: CN202022004876.7U
Authority: CN
Inventors: 陈建林; 刘文广; 史培玉; 赵振刚; 林木; 高勇; 马军波; 林红; 朱凌峰; 李丹
Original assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co Oil and Gas Gathering and Transportation
Current assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co Oil and Gas Gathering and Transportation
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-06-22
Anticipated expiration: 2030-09-14

Abstract

A self-weight correction combined type steel belt liquid level meter comprises a floating disc, a traction rope, a steel belt measuring tape, a top pulley block and a bottom pulley block. The steel belt liquid level meter of the utility model can automatically correct by additionally arranging the top pulley combination and the bottom pulley combination on the basis of the prior art; the deformation of the fixing surface can be ignored after the installation, so that the use condition is wider; the additional balancing weight can play the anticorrosive effect of negative pole and prolong the life of level gauge.

Description

Combined steel belt liquid level meter capable of correcting by self weight

Technical Field

The utility model relates to a level measurement device especially relates to a combination formula steel band level gauge with automatic correction function.

Background

The steel band level gauge is a conventional level gauge. The device is designed and manufactured by utilizing the principle of mechanical balance and comprises a steel band tape, a displacement transmission system, a display device, a transmitter device and other peripheral devices. The float immersed in the liquid to be measured is acted by gravity W, buoyancy F and constant pull force T generated by a constant force device, and when the vector sum of the three forces is equal to zero, the float is in a quasi-equilibrium static state. The buoyancy is quasi-constant at mechanical equilibrium.

When the liquid level changes, the original mechanical balance reaches new balance through the movement of the steel strip under the disturbance of the buoyancy force of the floater. The floater is used as a part of the liquid level detection device to drive the steel belt to move according to the liquid level condition, and the displacement transmission system drives the transmission pin to rotate through the movement of the steel belt, so that the displacement transmission system acts on the counter to display the liquid level condition.

In electrification transformation, the liquid level condition can be converted into a standard electric signal through a transmitter, the standard electric signal is output through a signal line, and other control equipment can be driven. At present, a large-sized storage tank is usually provided with a steel belt liquid level meter for measuring the liquid level height in the storage tank. The reading method is divided into two types: firstly, reading is carried out through on-site observation, and secondly, remote reading is carried out through a PLC system.

In the prior art, CN1504728A discloses a spiral steel belt level meter and a liquid level determining method, which is characterized in that a steel belt is wound on a cylindrical take-up reel, a spiral is formed in the central axis of the steel belt, and a float is directly suspended at the lower end of the steel belt, and the liquid level computing method comprises the following steps: the extension length and the liquid level height of the steel belt can be obtained by measuring the rotation angle of the steel belt disc, the diameter of the steel belt disc and the thickness of the steel belt according to an angle sensor of the liquid level meter. The device is not affected by severe liquid level and instrument impact, can normally operate, has simple structure and strong reliability, and can calculate the liquid level height accurately and simply.

CN2090522U discloses a steel band liquid level meter for detecting the liquid level inside a container, wherein a transmission steel band moving synchronously with a float is used as a sensing element for acquiring a liquid level signal, a scale number corresponding to the lifting position of the float is engraved on the transmission steel band for on-site visual reading, and a coding signal unit is stored on the transmission steel band, detected by a direct-projection signal detecting head, and transmitted to a secondary instrument in an optical signal or electrical signal manner.

CN205120211U discloses a novel oil-water liquid level measuring device, which consists of an oil tank, an oil layer, a water layer, a floater, a steel belt, a guide wheel, a protective pipe bracket, a liquid level meter dial, a fixed seat, a pressure transmitter, a secondary dial and a data transceiver; it is characterized in that an oil layer and a water layer are arranged in the oil tank; the floater is positioned in an oil layer inside the oil tank; the number of the guide wheels is two, and the guide wheels are arranged at the edge of the upper end of the oil tank; the steel belt is positioned in the protective pipe, bypasses the guide wheel, and is connected with the dial plate of the liquid level meter at one end and connected with the floater in the oil tank at the other end; one end of the protective pipe is connected with the dial plate of the liquid level meter, and the other end of the protective pipe is connected with the oil tank; the two fixed seats are arranged, one fixed seat fixes the dial plate of the liquid level meter on the side surface of the oil tank, and the other fixed seat fixes the pressure transmitter on the bottom of the side surface of the oil tank; and the secondary dial plate is connected with the pressure transmitter through a lead.

CN106989798A discloses a steel band level gauge belongs to level gauge technical field, including float, steel band, sprocket, spring wheel and steel band wheel, the float link to each other with the steel band through link and couple, the steel band is connected with the sprocket after through two at least constant tension running rollers, the sprocket on be equipped with the driving pin, the driving pin is connected with the output shaft of changer through shifting the fork to be connected with the millimeter calibrated scale in the counter, the other end of winding steel band is connected with the spring wheel on the steel band wheel, is equipped with balance spring on the spring wheel. The invention has the beneficial effects that: the liquid level meter has the advantages of strong practicability, large measurement range, high precision, stable performance, long service life, convenience in maintenance and the like, and can be connected with various transmitters to form a liquid level detection system; by adopting the counter with a special structure, the measuring precision can be improved to a millimeter level, and the reading is clear and accurate; in addition, the working condition of the instrument can be checked at any time, and the use is more convenient.

CN206440350U discloses a steel band formula level gauge, has solved the problem that the level measurement buoy of current liquid storage jar does not set up guider and the buoy takes place the horizontal swing and then causes the error of measurement. The steel belt type liquid level meter comprises a buoy, two guide steel wires, a connecting steel belt, a first fixed pulley, a second fixed pulley, a third fixed pulley, a fourth fixed pulley, a balance weight and two auxiliary buoys. The resistance of this level gauge assembly pulley is little can also and play the guide effect, and balanced weight gravity, buoy gravity and jar interior liquid buoyancy interact, and when the liquid level changed, the buoy drove and connects steel band synchronous motion, and then changes through the scale of connecting on the steel band, realizes the measurement of on-the-spot observation and liquid level. The utility model is suitable for a level measurement.

However, the liquid level meter in the comparison document has a complex structure, and due to weather changes, a steel belt measuring tape is corroded, so that the steel belt is broken or the steel belt measuring tape is clamped, the service life is prolonged, the reading error is influenced, and hidden dangers are caused to the safety production of the oil depot.

Meanwhile, the installation and the use of the steel band liquid level meter require that the plane fixed by the installation is level and parallel, and the vertical centering rate of the pulley at the top and the pulley at the bottom of the steel band liquid level meter is changed due to the deformation of the fixed plane in the use process, so that the phenomena of eccentric wear and belt clamping are caused. The service life is influenced, the reading is wrong, and hidden dangers are caused to the safety production of the oil depot.

SUMMERY OF THE UTILITY MODEL

The steel band liquid level meter solves the problem that the steel band liquid level meter is corroded due to environmental problems to cause steel band fracture and clamping, prolongs the service life of the steel band liquid level meter, solves the problem that the steel band liquid level meter is deformed due to the fact that the centering rate of a top pulley and a bottom pulley is changed to cause eccentric wear between a steel band tape and the pulleys to cause steel band fracture or steel band tape clamping, prolongs the service life of the steel band liquid level meter, solves the problem that the steel band liquid level meter is severely required to be horizontal and parallel to the fixing surface in the installation process. The use and the installation conditions of the steel belt liquid level meter are more flexible and wider. The utility model provides a steel band level gauge.

Firstly, the connection mode of the pulley at the top of the steel band liquid level meter and the fixed support is changed into a spherical correction device from four-point bolt fixation.

Then, a balancing weight is additionally arranged on the top pulley, and the balancing weight can be made of zinc or aluminum.

Then the four-point fixed type of the pulley at the bottom of the steel belt liquid level meter is changed into a single-point buckle rotatable type and a horizontal direction sliding rail is additionally arranged.

Then the connection between the fixed part of the bottom liquid level meter and the pulley is changed into a universal shaft connection by a hard rod.

Wherein:

the top pulley combination device automatically corrects the direction through the spherical correction device under the action of the gravity of the balancing weight and the deformation elasticity of the steel belt.

The balancing weight of the top pulley combination device can provide the cathode corrosion prevention function and prolong the service life of the steel belt liquid level meter

The bottom pulley combination device is automatically combined with the top pulley for alignment under the combined action of the track, the universal shaft and the rotatable buckle type connection under the action of the deformation of the steel belt and the tension provided by the steel belt pipe tape measure.

The specific technical scheme is as follows:

a self-weight correction combined type steel belt liquid level meter comprises a floating disc, a traction rope, a steel belt measuring tape, a top pulley block and a bottom pulley block.

Preferably, one end of the top pulley block is connected with the traction rope, and the other end of the top pulley block is connected with the bottom pulley block.

Preferably, one end of the bottom pulley block is connected with the top pulley block, and the other end of the bottom pulley block is connected with the steel belt measuring tape.

Preferably, the top pulley block comprises a spherical correcting device, a top main pulley and a balancing weight.

Preferably, the bottom pulley block comprises a bottom main pulley, a universal shaft, a columnar pulley, a sliding rail and a rotatable single-point buckle.

Preferably, one end of the traction rope is connected with the floating disc, and the other end of the traction rope is connected with the top pulley block.

Preferably, the traction rope is connected with the top pulley block through a pulley.

The steel belt liquid level meter of the utility model can automatically correct by additionally arranging the top pulley combination and the bottom pulley combination on the basis of the prior art; the deformation of the fixing surface can be ignored after the installation, so that the use condition is wider; the additional balancing weight can play the anticorrosive effect of negative pole and prolong the life of level gauge.

Drawings

FIG. 1 is a schematic structural view of the steel band liquid level meter of the present invention;

FIG. 2 is a schematic structural diagram of a pulley block at the top of the steel strip liquid level meter in FIG. 1;

FIG. 3 is a schematic structural diagram of a bottom pulley block of the steel band liquid level meter shown in FIG. 1.

The reference numbers are as follows:

1-floating disc 2-traction rope 3-top pulley block 4-steel band tape 5-bottom pulley block 6-spherical correction device 7-top main pulley 8-balancing weight 9-bottom main pulley 10-universal shaft 11-columnar pulley and sliding rail 12-rotatable single point buckle

Detailed Description

The invention is described in detail below with reference to the drawings. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The described embodiments are merely exemplary and are intended to illustrate the invention and should not be construed as limiting the invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly.

Some oil storage tank needs to monitor its internal reserves in real time, and therefore, a steel band liquid level meter is installed therein.

Referring to the attached figure 1, the self-weight correction combined type steel belt liquid level meter comprises a floating disc, a traction rope, a steel belt measuring tape, a top pulley block and a bottom pulley block. The floating disc can change the height of the floating disc along with the amount of fluid in the container, and the floating disc is connected with the traction rope and can guide out the position information of the floating disc through the traction rope.

The haulage rope passes through a pulley connection top assembly pulley, reduces entire system's volume, changes the direction of force in the haulage rope, the control of being convenient for.

The other end of the top pulley block is connected with the bottom pulley block, and the other end of the bottom pulley block is connected with the steel belt measuring tape.

Referring to fig. 2, the top pulley block comprises a spherical correcting device, a top main pulley and a balancing weight, and the balancing weight can be made of zinc or aluminum. Referring to fig. 3, the bottom pulley block comprises a bottom main pulley, a cardan shaft, a cylindrical pulley, a sliding track and a rotatable single-point buckle. Wherein, the top assembly pulley can be under the effect of the gravity of balancing weight and the deformation elasticity of steel band through the automatic direction correction of spherical orthotic devices, and simultaneously, the balancing weight can provide the anticorrosive function of negative pole, prolongs the life of steel band level gauge. The spherical orthotic device includes a positioning ball, a retaining frame and a connecting portion, and the principles of orthotic are well known in the art and will not be described in detail herein.

In the use process, the liquid level change of the storage tank causes the floating plate to displace up and down under the action of gravity and buoyancy. The steel band tape is subjected to the tension of the traction rope on the floating disc to cause the change of the flexibility.

The bottom pulley block enables the bottom main pulley and the steel belt to be located on the same horizontal plane through the rotatable single-point buckle under the action of upward pulling force of the steel belt and elastic force of the steel belt. The bottom main pulley and the top main pulley automatically find the same horizontal plane under the action of the tension of the steel belt. At the moment, if the bottom main pulley and the top main pulley are not on the same horizontal plane, the bottom main pulley and the top main pulley are automatically aligned under the action of the tension of the steel belt and the elastic deformation of the steel belt measuring tape and under the action of the columnar pulley, the sliding rail and the universal shaft. The universal shaft comprises an upper connecting rod and a lower connecting rod, and the upper connecting rod and the lower connecting rod can swing for 180 degrees in the vertical direction through a clamp. The bottom pulley block is automatically combined with the top pulley for alignment under the combined action of the deformation of the steel belt and the tension provided by the steel belt pipe tape measure through the columnar pulley, the sliding track, the universal shaft and the rotatable buckle type connection.

The top pulley combination is provided with an arc-shaped concave hole which is thicker than a connecting shaft rod of the spherical correction device and thinner than a top sphere of the spherical correction device on a fixed plane. The connecting shaft rod of the spherical correcting device penetrates through the concave hole to be connected with the pulley, the central shaft of the pulley extends outwards to form a centrally symmetrical counterweight device, and the central line of the counterweight device is superposed with the central line of the pulley. And the top point of the counterweight device is connected with a counterweight block by a steel wire rope. At this time, the counterweight block provides a downward gravity along the steel wire rope. At this time, the stress of the spherical correction device is the tension of the steel belt, the gravity of the pulley and the balancing weight and the tension of the connecting shaft rod. At the moment, the bottom main pulley and the top main pulley are in the same horizontal plane under the action of the tension of the steel belt and the elasticity of the steel belt, and if the top main pulley and the bottom main pulley are slightly misaligned, the top main pulley is slightly displaced under the action of the spherical correcting device and the elastic deformation of the steel belt, so that the top main pulley and the bottom main pulley are in the same horizontal plane. Meanwhile, due to the gravity action of the balancing weight, the bottom pulley block is corrected by the reaction force of the steel belt, and the position of the steel belt measuring tape is corrected in the gravity direction by the tension and the deformation of the bottom pulley block and the steel belt.

The foregoing is only a part of the preferred embodiments of the present invention. Any person skilled in the art may modify the above-described embodiments or modify them to equivalent solutions. Therefore, any simple modifications or equivalent replacements made according to the embodiments of the present invention belong to the scope of the claimed invention.

Claims

1. The utility model provides a combination formula steel band level gauge is corrected to dead weight, includes floating plate, haulage rope, steel band tape measure, its characterized in that: the device also comprises a top pulley block and a bottom pulley block; one end of the top pulley block is connected with the traction rope, and the other end of the top pulley block is connected with the bottom pulley block; one end of the bottom pulley block is connected with the top pulley block, and the other end of the bottom pulley block is connected with the steel belt tape; the top pulley block comprises a spherical correcting device, a top main pulley and a balancing weight; the bottom pulley block comprises a bottom main pulley, a universal shaft, a columnar pulley, a sliding track and a rotatable single-point buckle; one end of the traction rope is connected with the floating disc, and the other end of the traction rope is connected with the top pulley block.

2. The self-weight-straightening combined steel belt liquid level meter as claimed in claim 1, characterized in that: the traction rope is connected with the top pulley block through a pulley.