Device for measuring actual liquid level of tar in tar storage tank

Abstract

The utility model discloses a device for measuring the actual liquid level of tar in a tar storage tank, which belongs to the field of liquid level detection and comprises a support main body which is rotatably connected with a traction component. The support body is further rotationally connected with a measuring assembly. The measuring assembly comprises a wheel type range finder rotationally connected to the support main body and an electronic scale hung on the top of the support main body, and the bottom surface of the electronic scale is rotationally connected with a metering guide wheel; the metering guide wheel is used as a fixed pulley, so that the electronic scale reads the stress of the metering guide wheel; the traction assembly comprises a plurality of guide wheels, a pull wire is arranged on the guide wheel at one end, and the pull wire is sequentially lapped on the traction assembly and is lapped on the measurement assembly at the same time; and the free end of the pull wire is fixedly connected with a pendant. According to the device, the electronic scale and the wheel type range finder are combined for use, the weight change of the pendant and the displacement of the stay wire are detected in real time, and therefore the actual liquid level value of tar is accurately calculated.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid level, and in particular relates to a device for measuring the actual liquid level of tar in a tar storage tank. Background Art

[0002] In order to separate other substances mixed in the tar, the tar in the finished product storage tank is usually heated, the heating temperature is maintained at 70 to 80 degrees Celsius, and the tar is left to stand for a period of time to allow the other substances mixed in the tar to naturally stratify; through natural stratification, water is separated from the tar, the water contained in the tar will precipitate and float on the surface of the tar liquid, while the tar residue contained in the tar is deposited at the bottom. The materials in the storage tank are water layer, tar layer and tar residue layer from top to bottom.

[0003] The actual amount of tar contained in the storage tank is calculated from the actual liquid level of the tar. The liquid level in the tar tank is generally measured by a guided wave radar level meter. The measured height value includes the thickness of the water layer above the tar and the tar residue at the bottom, which cannot truly reflect the effective liquid level of the tar in the storage tank. As a result, inaccurate calculation of tar inventory leads to delays in tar exports, which has a certain impact on the company's reputation.

[0004] In view of the above situation, the tar storage tank is manually measured weekly for liquid level measurement. During manual measurement, the measurement personnel need to stand at the edge of the manhole at the top of the storage tank, hold the pull line of the hanging pendant and slowly release the line from the top of the storage tank to the water layer surface, and mark point 1 on the pull line; continue to slowly release the line to make the pendant enter the liquid surface below the water layer, and judge whether the pendant enters the tar layer by hand feeling and mark point 2; continue to slowly release the line until the pendant is basically weightless by hand feeling and mark point 3; then pull out the pull line and the pendant as a whole and lay them flat on the top of the storage tank, and then measure the marked points with a tape measure, and calculate the height of the water layer, tar layer and tar residue in the storage tank respectively according to the design height of the storage tank. The method of judging the liquid level by hand feeling during manual measurement is greatly affected by human factors, has subjective errors, and is not uniform. The measurement personnel standing on the edge of the manhole not only have the risk of falling, but also the toxic gas emitted from the manhole at the top of the storage tank will affect the state and health of the measurement personnel, bringing difficulties to the measurement work. At the same time, the pull cord is disposable and discarded after use, which brings certain impacts to the environment. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides a device for measuring the actual liquid level of tar in a tar storage tank. The device measures the weight of the pendant in media of different densities and measures the height of the medium in combination with the length of the pull line, so that the measurement personnel can accurately measure the height of different media in the storage tank, thereby accurately measuring the tar inventory; at the same time, the setting of the device avoids the potential danger of close-range measurement for operators and prevents the operators from inhaling toxic gases that affect their health.

[0006] The utility model is realized in this way: a device for measuring the actual liquid level of tar in a tar storage tank comprises a bracket body, and a traction assembly is rotatably connected to the bracket body;

[0007] The bracket body is also rotatably connected to a measuring component;

[0008] The measuring assembly includes a wheeled distance meter rotatably connected to the support body, and an electronic scale hoisted on the top of the support body, wherein the bottom surface of the electronic scale is rotatably connected to a metering guide wheel; the metering guide wheel serves as a fixed pulley, so that the electronic scale reads its force;

[0009] The traction assembly includes a plurality of guide wheels, one end of which is provided with a pull wire, and the pull wire is sequentially overlapped on the traction assembly and simultaneously overlapped on the measuring assembly;

[0010] The free end of the pull wire is fixedly connected to a pendant;

[0011] The actual liquid level value of tar is calculated according to the change of the weight of the pendant in different liquids.

[0012] Furthermore, the bracket body includes a horizontally arranged base, on which a first bracket and a second bracket are vertically arranged; a fixed beam parallel to the base is arranged on the top of the first bracket; the fixed beam includes a measuring end and a transmission end; the fixed beam, the first bracket and the base form an I-shaped structure.

[0013] Furthermore, the traction assembly includes a third guide wheel arranged at the measuring end, a first guide wheel arranged at the transmission end, and a second guide wheel arranged on the fixed beam, and the first guide wheel and the second guide wheel are symmetrically arranged with the first bracket as the symmetry axis; and also includes a driving wheel arranged on the second bracket.

[0014] Furthermore, the wheeled rangefinder is rotatably connected to the first bracket, and the top end of the wheeled rangefinder is tangent to a center line connecting the first guide wheel and the second guide wheel.

[0015] Furthermore, a suspension rod is horizontally extended from the top of the second bracket, an electronic scale is suspended on the bottom of the suspension rod, and a metering guide wheel is rotatably connected to the lower end of the electronic scale.

[0016] Furthermore, a pull wire is wound around the driving wheel, and the pull wire is sequentially overlapped on the metering guide wheel, the first guide wheel, the wheel rangefinder, the second guide wheel and the third guide wheel; and a pendant is fixedly connected at the end.

[0017] Furthermore, a crank is provided on the driving wheel to facilitate shaking the driving wheel to retract and release the pull wire.

[0018] Furthermore, a universal level is provided on the top surface of the base, and the universal level is used to detect the horizontality of the base.

[0019] Furthermore, the bottom surface of the base is provided with a fixed foot, a first adjustable foot and a second adjustable foot; the fixed foot, the first adjustable foot and the second adjustable foot form a triangle supported on the bottom surface of the base, and the horizontality of the base is adjusted by the first adjustable foot and the second adjustable foot.

[0020] Furthermore, the measuring end is also hinged with an oil remover, and an oil scraping groove is arranged at the end of the oil remover; after the measurement is completed, the oil remover is rotated so that the pull wire is located in the oil scraping groove, and as the pull wire is lifted, the tar adhered to the surface of the pull wire is scraped off by the side wall of the oil scraping groove.

[0021] The utility model has the following advantages and technical effects:

[0022] 1. High-precision measurement: By combining the electronic scale and the wheel distance meter, the weight change of the pendant and the displacement of the pull line can be detected in real time, so as to accurately calculate the actual liquid level value of the tar.

[0023] 2. Simple structure and easy operation: This device adopts modular design, with simple and clear structure, easy to install and maintain. In addition, by shaking the crank on the driving wheel, the retraction and extension of the pull line can be easily controlled, which is simple and quick to operate.

[0024] 3. Easy calibration: The universal level and adjustable feet installed on the base can detect and adjust the levelness of the device to ensure the accuracy of the measurement results.

[0025] 4. Oil removal function: The oil remover hinged at the measuring end can effectively remove the tar on the surface of the wire, extending the service life of the device.

[0026] 5. Good stability: The device has a triangular support structure formed by a fixed foot, a first adjustable foot and a second adjustable foot, which ensures the stability of the device during the measurement process.

[0027] 6. Strong adaptability: This device is not only suitable for measuring tar level, but can also be modified as needed to measure the depth of other liquids, so it has strong versatility and adaptability.

[0028] At the same time, this device combines mechanical structure with physical principles to accurately measure the tar liquid level value. It has a simple structure, convenient processing, low processing cost, and easy operation. It avoids the problem of judging the position of different medium layers due to the feel and subjective differences of the measurement personnel, simplifies the measurement operation steps, and the measurement tools are reusable, and the safety and health of the measurement personnel are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the utility model;

[0030] Figure 2 It is a schematic diagram of the main structure of the bracket provided by the embodiment of the utility model;

[0031] Figure 3 It is a schematic diagram of the structure of an electronic scale provided by an embodiment of the utility model;

[0032] Figure 4 It is a schematic diagram of the structure of a wheeled distance meter provided by an embodiment of the utility model;

[0033] Figure 5 It is a top view of the oil remover provided by the embodiment of the utility model;

[0034] Figure 6 It is a schematic diagram of measurement preparation provided by an embodiment of the utility model.

[0035] In the figure: 1. base; 2. first bracket; 3. second bracket; 4. driving wheel; 5. electronic scale; 6. wheel distance meter; 7. first guide wheel; 8. second guide wheel; 9. fixed beam; 10. third guide wheel; 11. pendant; 12. pull wire; 13. crank; 14. oil scraper tank; 15. traction assembly; 16. transmission end; 17. measuring end; 18. suspension rod; 19. rubber ring; 20. bracket body; 21. oil remover; 22. metering guide wheel; 23. universal level; 24. fixed foot; 25. first adjustable foot; 26. second adjustable foot; 27. manhole; 28. tar storage tank; 29. ​​digital display screen; 30. mechanical counter; 31. measuring assembly. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0037] See also Figures 1 to 5 A device for measuring the actual liquid level of tar in a tar storage tank includes a bracket body 20, and a traction component 15 rotatably connected to the bracket body 20; it also includes a measuring component 31 rotatably connected to the bracket body 20; the measuring component 31 includes a wheeled distance meter 6, and an electronic scale 5 hoisted on the top of the bracket body 20, and the bottom surface of the electronic scale 5 is rotatably connected to a metering guide wheel 22.

[0038] The traction assembly 15 includes a plurality of guide wheels, one end of which is set as a driving wheel 4, on which a pull wire 12 is wound. The pull wire 12 is sequentially overlapped with the traction assembly 15, and is also overlapped with the wheel distance meter 6 and the metering guide wheel 22. One end of the pull wire 12 passing through the traction assembly 15 is set as a free end.

[0039] The free end of the pull line 12 is fixedly connected to a pendant 11, and the pendant 11 is made of a material with a density of 2±0.3 g / cm 3 The pendant 11 is made of a material, has a cone shape, and weighs 200±50g. The change in the liquid composition is determined based on the measured change in the weight of the pendant 11 in different liquids, and the actual liquid level value of the tar is calculated in combination with the moving distance of the pull wire 12.

[0040] The bracket body 20 includes a horizontally arranged base 1, on which a first bracket 2 and a second bracket 3 are vertically welded, the first bracket 2 is arranged in the middle of the base 1 or at one end of the base 1, and the second bracket 3 is arranged at the other end of the base 1; a fixed beam 9 parallel to the base 1 is welded on the top of the first bracket 2, and the fixed beam 9 is also perpendicular to the second bracket 3; the fixed beam 9 includes a measuring end 17 and a transmission end 16, and the measuring end 17 is longer than the transmission end 16 to facilitate measurement operations; the fixed beam 9, the first bracket 2, and the base 1 roughly form an I-shaped structure.

[0041] The traction assembly 15 includes a third guide wheel 10 hinged to the measuring end 17 through an articulated shaft, a first guide wheel 7 hinged to the transmission end 16 through an articulated shaft, and a second guide wheel 8 hinged to the fixed beam 9 through an articulated shaft. The first guide wheel 7 and the second guide wheel 8 are symmetrically arranged with the first bracket 2 as the symmetry axis; the pulley assembly also includes a driving wheel 4 hinged to the second bracket 3 through an articulated shaft, and the pull wire 12 is wound around the circumferential outer side of the driving wheel 4.

[0042] The wheeled distance meter 6 is hinged to the first bracket 2 via a hinge shaft, and the top end of the wheeled distance meter 6 is tangent to the center line of the first guide wheel 7 and the second guide wheel 8 .

[0043] A suspension rod 18 is provided at the top of the second bracket 3 extending in the horizontal direction, and an electronic scale 5 is suspended on the bottom of the suspension rod 18. A metering guide wheel 22 is hinged at the lower end of the electronic scale 5 through a hinge shaft. The metering guide wheel 22 is suspended above the driving wheel 4 and the first guide wheel 7. The vertical tangent of the left side of the metering guide wheel 22 is tangent to the first guide wheel 7, and the vertical tangent of the right side is tangent to the driving wheel 4. After the pull wire 12 is assembled with the metering guide wheel 22, the metering guide wheel 22 acts as a fixed pulley to transmit the gravity of the pendant 11 and the tension of the driving wheel 4 to the electronic scale 5. The metering guide wheel 22 acts as a fixed pulley, and the value measured by the electronic scale 5 is twice the actual weight of the pendant 11. For the convenience of description, the reading of the electronic scale 5 is called the weight of the pendant 11.

[0044] The pull wire 12 is overlapped on the metering guide wheel 22, the first guide wheel 7, the wheeled distance meter 6, the second guide wheel 8 and the third guide wheel 10 in sequence; since the top end of the wheeled distance meter 6 is tangent to the center line of the first guide wheel 7 and the second guide wheel 8, the pull wire 12 and the wheeled distance meter 6 change from point contact to line contact, and at the same time, a rubber ring 19 is arranged on the outer side of the wheeled distance meter 6 to increase the friction between the pull wire 12 and the wheeled distance meter 6, so that the wheeled distance meter 6 can rotate with the movement of the pull wire 12; a mechanical counter 30 is arranged on the wheeled distance meter 6, and the mechanical counter 30 is used to measure the moving distance of the wheeled distance meter 6.

[0045] A crank 13 is welded to the side of the driving wheel 4 , and the crank 13 is used to shake the driving wheel 4 to retract and release the pull wire 12 .

[0046] A universal level 23 is bolted to the top surface of the base 1 , and the universal level 23 is used to detect the horizontality of the base 1 .

[0047] A fixed foot 24, a first adjustable foot 25 and a second adjustable foot 26 are welded to the bottom surface of the base 1; the fixed foot 24, the first adjustable foot 25 and the second adjustable foot 26 form a triangle supported on the bottom surface of the base 1, and the horizontality of the base 1 is adjusted by the first adjustable foot 25 and the second adjustable foot 26.

[0048] The measuring end 17 is hinged with an oil remover 21 through an articulated shaft. The oil remover 21 is an L-shaped structure, and an oil scraping groove 14 is provided at the end of the L-shaped structure. During measurement, the oil remover 21 is rotated to a position away from the pull wire 12. After the measurement is completed, the oil remover 21 is rotated so that the pull wire 12 is located in the oil scraping groove 14. As the pull wire 12 is lifted, the tar adhered to the surface of the pull wire 12 is scraped off by the side wall of the oil scraping groove 14.

[0049] See also Figure 6 Before measurement, place the device on the top of the tar storage tank 28, with the pendant 11 located directly above the manhole 27, adjust the first adjustable foot 25 and the second adjustable foot 26, and observe the universal level 23 at the same time. Stop adjusting the adjustable feet after the base 1 reaches the level; record the value of the digital display screen 29 of the electronic scale 5, and adjust the lower end surface of the pendant 11 to the same horizontal plane as the top surface of the manhole 27 by shaking the crank 13; and reset the value of the mechanical counter 30 to zero.

[0050] During measurement, the oil remover 21 is moved to a position away from the pull wire 12; the crank handle 13 is rotated at a constant speed to drive the driving wheel 4 to rotate, and the pull wire 12 is gradually released as the driving wheel 4 rotates, so that the pendant 11 gradually descends into the manhole 27; when the pendant 11 is just immersed in the liquid surface, the value displayed on the digital display screen 29 will decrease by about 50% of the weight of the pendant 11, and the value of the mechanical counter is recorded at this time and set to value 1; the value displayed on the digital display screen 29 is reduced by 50% because the upper part of the tar storage tank 28 is a water layer, and after the pendant 11 is immersed in water, the density of the pendant 11 is 2±0.3g / cm 3 , which is twice the density of water. The pendant 11 is subject to the buoyancy of water, and the pulling force of the metering guide wheel 22 on the pendant 11 reduces the weight of the pendant 11 by 50%.

[0051] Continue to turn the crank 13. When the value displayed on the digital display screen 29 decreases by about 10% of the weight of the pendant 11, record the value of the mechanical counter and set it to value 2. The value displayed on the digital display screen 29 decreases by about 10% again because the pendant 11 passes through the water layer and enters the tar layer. The density of tar is 1.2 g / cm 3 The pendant 11 is subjected to the buoyancy of the tar, and the pulling force of the metering guide wheel 22 on the pendant 11 is further reduced by about 10% of the weight of the pendant 11.

[0052] Continue to turn the crank 13 until the value on the digital display screen decreases to zero, record the value of the mechanical counter, and set it to the value three; the value on the digital display screen decreases to zero because the pendant 11 is in contact with the tar residue, and the tar residue supports the pendant 11, and the pulling force of the metering guide wheel 22 on the pendant 11 approaches zero.

[0053] After the measurement is completed, the oil remover 21 is rotated to allow the pull wire 12 to enter the oil scraping groove 14, and the crank 13 is operated in the reverse direction to retract the pull wire 12 and the pendant 11.

[0054] The measuring principle of this device is:

[0055] The total height of the tar tank minus the value recorded by the mechanical counter is the total height of the medium in the tank.

[0056] The difference between the value two recorded by the mechanical counter and the value one recorded by the mechanical counter is the water layer height.

[0057] The difference between the value three recorded by the mechanical counter and the value two recorded by the mechanical counter is the height of the tar layer.

[0058] The difference between the total height of the tar tank and the value recorded by the mechanical counter is the tar residue height.

[0059] This device combines mechanical structure with physical principles to accurately measure the tar level value. It has a simple structure, is easy to process, has low processing cost, and is easy to operate. It avoids the problem of different positions of different liquid layers caused by the hand feeling and subjective differences of the measurement personnel, simplifies the measurement operation steps, and the measurement tools can be reused, and ensures the safety and health of the measurement personnel. At the same time, it avoids the problems such as delays in tar export due to inaccurate calculation of tar inventory.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for measuring the actual liquid level of tar in a tar storage tank, comprising a support body (20), to which a traction assembly (15) is rotatably connected; characterized in that: The support body (20) is also rotatably connected to a measuring component (31); The measuring assembly (31) comprises a wheeled distance meter (6) rotatably connected to the support body (20), and an electronic scale (5) hoisted on the top of the support body (20), wherein the bottom surface of the electronic scale (5) is rotatably connected to a metering guide wheel (22); the metering guide wheel (22) serves as a fixed pulley, so that the electronic scale (5) can read the force applied to the metering guide wheel (22); The traction assembly (15) comprises a plurality of guide wheels, wherein the guide wheel at one end is arranged as a driving wheel (4), a pull wire (12) is arranged on the driving wheel, and the pull wire (12) is sequentially overlapped on other guide wheels of the traction assembly (15), and is also overlapped on the wheel distance meter (6) and the metering guide wheel (22) of the measuring assembly (31); The free end of the pull wire (12) is fixedly connected to a pendant (11), and the density of the pendant (11) is greater than the density of tar; According to the change of the buoyancy of the pendant (11) in different liquids, the actual liquid level value of the tar is calculated.

2. The device for measuring the actual liquid level of tar in a tar storage tank according to claim 1, characterized in that: The support body (20) comprises a horizontally arranged base (1), on which a first support (2) and a second support (3) are vertically arranged; a fixed beam (9) parallel to the base (1) is arranged on the top of the first support (2); the fixed beam (9) comprises a measuring end (17) and a transmission end (16); the fixed beam (9), the first support (2) and the base (1) form an I-shaped structure.

3. The device for measuring the actual liquid level of tar in a tar storage tank according to claim 2, characterized in that: The traction assembly (15) comprises a third guide wheel (10) arranged at the measuring end (17), a first guide wheel (7) arranged at the transmission end (16), a second guide wheel (8) arranged on the fixed beam (9), the first guide wheel (7) and the second guide wheel (8) being symmetrically arranged with the first bracket (2) as a symmetry axis; and a driving wheel (4) arranged on the second bracket (3).

4. The device for measuring the actual liquid level of tar in a tar storage tank according to claim 3, characterized in that: The wheeled distance meter (6) is rotatably connected to the first bracket (2), and the top end of the wheeled distance meter (6) is tangent to a center line connecting the first guide wheel (7) and the second guide wheel (8).

5. The device for measuring the actual liquid level of tar in a tar storage tank according to claim 4, characterized in that: A suspension rod (18) is provided at the top of the second bracket (3) extending in the horizontal direction, an electronic scale (5) is suspended on the bottom surface of the suspension rod (18), and a metering guide wheel (22) is rotatably connected to the lower end of the electronic scale (5).

6. The device for measuring the actual liquid level of tar in a tar storage tank according to claim 5, characterized in that: A pull wire (12) is wound around the driving wheel (4), and the pull wire (12) is sequentially overlapped on the metering guide wheel (22), the first guide wheel (7), the wheel distance meter (6), the second guide wheel (8) and the third guide wheel (10).

7. The device for measuring the actual liquid level of tar in a tar storage tank according to claim 3, characterized in that: The driving wheel (4) is provided with a crank (13) for facilitating shaking the driving wheel (4) to retract and release the pull wire (12).

8. The device for measuring the actual liquid level of tar in a tar storage tank according to claim 2, characterized in that: A universal level (23) is provided on the top surface of the base (1), and the universal level (23) is used to detect the horizontality of the base (1).

9. The device for measuring the actual liquid level of tar in a tar storage tank according to claim 8, characterized in that: The bottom surface of the base (1) is provided with a fixed foot (24), a first adjustable foot (25) and a second adjustable foot (26); the fixed foot (24), the first adjustable foot (25) and the second adjustable foot (26) form a triangle supported on the bottom surface of the base (1), and the horizontality of the base (1) is adjusted by means of the first adjustable foot (25) and the second adjustable foot (26).

10. The device for measuring the actual liquid level of tar in a tar storage tank according to claim 9, characterized in that: The measuring end (17) is also hingedly connected to a degreaser (21), and an oil scraping groove (14) is provided at the end of the degreaser (21). After the measurement is completed, the degreaser (21) is rotated so that the pull wire (12) is located in the oil scraping groove (14). As the pull wire (12) is lifted, the tar adhered to the surface of the pull wire (12) is scraped off by the side wall of the oil scraping groove (14).

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