Asphalt storage tank liquid level measuring device

Abstract

The present invention relates to the field of metallurgical coking technology, and in particular to an asphalt storage tank liquid level measuring device. It includes a float, a weight, a traction rope, a pulley and a weighing module; the traction rope is installed on the pulley, the traction rope is sealed by liquid, one end of the traction rope is connected to the float, the float is placed in the asphalt storage tank, and the other end of the traction rope is connected to the weight, the weight is located outside the asphalt storage tank, and the weight is placed on the weighing module. The gravity of the float is greater than the buoyancy of the liquid asphalt, the weight of the weight is greater than the weight of the float, the weight of the weight is measured by the weighing module, and the weight difference between the weight and the float is used as the lowest point of the liquid level. As the liquid level inside the asphalt storage tank rises, buoyancy is generated and gradually increases, the weight applied by the weight to the weighing module gradually increases, and the weight value measured by the weighing module gradually increases, forming a corresponding relationship between the measurement value of the weighing module and the liquid level, and then measuring the liquid level of the asphalt storage tank. It can be displayed on site or on a plate, with good sealing effect, safe and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical coking, and in particular to a liquid level measuring device for an asphalt storage tank. Background Art

[0002] The asphalt produced by the tar distillation unit of the coking plant includes medium-temperature asphalt and modified asphalt. Part of it is produced into solid asphalt through the asphalt molding unit and sold, but another part is sold in the form of liquid asphalt. However, the problem of liquid level measurement in asphalt storage tanks has not been solved.

[0003] At present, float level gauges are usually used to measure the liquid level of asphalt storage tanks. The liquid level measurement on the instrument plate can also be converted into liquid level height by pressure measurement and liquid density calculation. However, due to the particularity of asphalt liquid, the storage temperature is as high as over 200°C, and there is a lot of asphalt smoke. The level gauge needs to be sealed, but float level gauges generally do not have a sealing function. Even if liquid seals are used, the sealing groove is usually very small due to the frequent sliding of the traction rope of the traction buoy, and the sealing liquid is consumed too quickly, resulting in seal failure. In addition, since liquid asphalt contains solid suspended matter such as polymers, the liquid has high viscosity and is easy to solidify. The asphalt on the instrument liquid pressure measurement interface is easily solidified and blocked, resulting in failure. Radar level gauges have also been used to measure the liquid level on the instrument plate, which can be used for a short time, but due to the condensation of asphalt smoke on the radar level gauge, the radar electromagnetic wave reception fails and maintenance is frequent. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides an asphalt storage tank liquid level measuring device, which can be displayed on-site or on a plate, has good sealing effect, and the traction rope hardly moves, thereby avoiding the loss of sealing liquid. It is not easy to be damaged, is safe and reliable, and has a long service life.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An asphalt tank liquid level measuring device includes a float, a weight, a traction rope, a pulley and a weighing module; the traction rope is installed on the pulley, the traction rope is sealed with liquid, one end of the traction rope is connected to the float, the float is placed in the asphalt tank, and the other end of the traction rope is connected to the weight, the weight is located outside the asphalt tank, and the weight is placed on the weighing module. The gravity of the float is greater than the buoyancy of the liquid asphalt, the weight of the weight is greater than the weight of the float, the weight of the weight is measured by the weighing module, and the weight difference between the weight and the float is used as the lowest point of the liquid level. As the liquid level inside the asphalt tank rises, buoyancy is generated and gradually increases, the weight applied by the weight to the weighing module gradually increases, and the weight value measured by the weighing module gradually increases, forming a corresponding relationship between the measurement value of the weighing module and the liquid level, thereby measuring the asphalt tank liquid level.

[0007] It also includes a liquid level measuring port, a fixed tee, a connecting tee, a fixed connecting pipe, a liquid sealing pipe and a liquid sealing tank; the liquid level measuring port is fixedly connected to the top of the asphalt storage tank, the liquid level measuring port is connected to the fixed connecting pipe, the fixed connecting pipe is connected to the fixed tee, and the fixed tee is connected to the connecting tee; one end of the liquid sealing pipe is inserted into the liquid in the liquid sealing tank, and the other end is connected to the fixed tee; a blind plate is provided at the end of the fixed tee, the pulley is fixed on the blind plate, and the pulley is located inside the fixed tee. A blind plate is provided at the end of the connecting tee, the pulley is fixed on the blind plate, and the pulley is located inside the connecting tee. A pulley is provided at the bottom of the liquid sealing tank, fixed on the blind plate at the bottom of the liquid sealing tank, and an observation hole is provided on the blind plate at the top of the liquid sealing tank.

[0008] The floating bucket is a columnar floating bucket, and its height exceeds the liquid level height that needs to be measured.

[0009] The weighing module is a compression weighing sensor or a single-point weighing sensor.

[0010] The weighing module is electrically connected to the liquid level recording instrument.

[0011] It also includes guide ropes, which are vertically fixed in the asphalt storage tank and located on both sides of the floating barrel.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The storage tank of the present invention adopts a columnar float whose weight is greater than the buoyancy in liquid asphalt inside, and adopts a weight greater than the weight of the columnar float outside. The weight is placed on the measuring module, and the weight is connected to the columnar float by a traction rope. The traction rope is sealed with liquid. The weight of the weight is measured by a weighing module, and the weight difference between the weight and the columnar float is used as the lowest point of the liquid level. As the liquid level inside the storage tank rises, buoyancy is generated and gradually increases, and the weight difference applied by the weight to the weighing module gradually increases, thus forming a corresponding relationship between the measurement value of the weighing module and the liquid level. This is used as a method for measuring the liquid level, which can be displayed on site or on a disk (remote terminal computer). The traction rope hardly moves, so there will be no loss of sealing liquid, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention.

[0015] In the figure: 1- Asphalt storage tank 2- Weighing module 3- Liquid level measuring port 4- Fixed tee 5- Connecting tee 6- Fixed connecting pipe 7- Liquid sealing pipe 8- Pulley 9- Blind plate 10- Liquid sealing tank 11- Traction rope 12- Floating bucket 13- Weight 14- Guide rope LR- Liquid level recording instrument DETAILED DESCRIPTION

[0016] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0017] [Example]

[0018] like Figure 1 As shown, an asphalt storage tank liquid level measuring device includes a weighing module 2, a liquid level measuring port 3, a fixed tee pipe 4, a connecting tee pipe 5, a fixed connecting pipe 6, a liquid sealing pipe 7, a pulley 8, a blind plate 9, a liquid sealing groove 10, a traction rope 11, a floating bucket 12, a weight 13, a guide rope 14 and an LR-liquid level recording instrument.

[0019] A float 12 is arranged inside the asphalt storage tank 1. The float 12 is columnar and has a gravity greater than the buoyancy of the liquid asphalt. When there is no liquid inside the storage tank, the lower edge of the columnar float 12 is 200 mm from the bottom of the asphalt storage tank 1, and the upper edge of the columnar float 12 exceeds the highest height of the measured liquid level.

[0020] The liquid level measuring port 3 is fixedly connected to the top of the asphalt storage tank 1. The liquid level measuring port 3 is connected to the fixed connecting pipe 6, the fixed connecting pipe 6 is connected to the fixed tee 4, and the fixed tee 4 is connected to the connecting tee 5. The fixed connecting pipe 6 serves to adjust the height of the fixed tee 4 and reserve space for the liquid seal groove. The fixed tee 4 serves to connect and fix external equipment. Two guide pulleys 8 are arranged inside. The internal guide pulley 8 is fixed by a blind plate 9 at one end for easy maintenance. The connecting tee 5 is connected and fixed to the fixed tee 4. A guide pulley 8 is arranged inside. The internal guide pulley 8 is fixed by a blind plate 9 at one end for easy maintenance.

[0021] One end of the liquid seal pipe 7 is inserted into the liquid seal tank 10 by 50 to 200 mm, and the other end is connected to the fixed three-way pipe 4. The liquid seal tank 10 performs liquid sealing on the guide pipe before the traction rope 11 comes out of the asphalt storage tank 1 and enters the liquid seal tank. A pulley 8 is provided at the bottom of the liquid seal tank 10, fixed on the blind plate 9 at the bottom of the liquid seal tank 8, and an observation hole is welded on the blind plate at the top of the liquid seal tank 10, which is convenient for observation and adding sealing liquid. The liquid seal pipe 7 is inserted into the liquid seal tank 10 by 50 to 200 mm, so that the guide pipe through which the traction rope 11 passes through the inside and outside is in an isolated state, so that the internal liquid vapor will not be released to the outside, and the outside air will not be sucked into the inside of the asphalt storage tank 1.

[0022] The weighing module 2 is a compression weighing sensor or a single-point weighing sensor, and is electrically connected to the liquid level recording instrument LR. It also includes a guide rope 14, which is vertically fixed inside and located on both sides of the floating barrel 12. The guide rope 14 prevents the columnar floating barrel 12 from shaking when the liquid is in and out.

[0023] The pulley 8 is a guide pulley, and its main function is to guide the traction rope 11 connecting the inside and the outside and reduce the sliding resistance of the traction rope 11.

[0024] One end of the traction rope 11 is fixedly connected to the floating barrel 12. After the traction rope 11 connected to the columnar floating barrel 12 comes out of the asphalt storage tank 1, it enters the fixed tee 4 through the fixed connecting pipe 6. The lower part of the fixed tee 4 is connected to the liquid sealing pipe 7 of the liquid sealing groove 10. The traction rope 11 enters the liquid sealing pipe 7 through the two guide pulleys 8 of the fixed tee 4, and is bent upward through the pulley 8 at the bottom of the liquid sealing groove 10, and enters the connecting tee 5, passes through the guide pulley 8 in the connecting tee 5, and is finally fixed to the heavy hammer 11. The traction rope 11 does not need to be sealed after leaving the liquid sealing groove 10, so the sealing groove 10 and the connecting tee 2 can be directly opened at the place where the traction rope 11 passes.

[0025] When there is no liquid inside the asphalt storage tank 1, the lower edge of the columnar float 12 is 200mm away from the bottom of the asphalt storage tank 1, and the upper edge of the columnar float 12 exceeds the highest height of the measured liquid level. At this time, the external weight 13 is placed on the weighing module 2, connected by the traction rope 11 and in a taut state. The weight difference between the weight 13 and the columnar float 12 is used as the corresponding value of the lowest point of the liquid level of 200mm. As the liquid level inside the asphalt storage tank 1 rises, the liquid surface exceeds the lowest point of the measured liquid level by 200mm, and buoyancy is generated and gradually increases. The weight of the weight 13 applied to the weighing module 2 gradually increases with the gradual increase of buoyancy, thus forming a corresponding relationship between the weighing module measurement value and the liquid level. This can be used as a liquid level measurement method, which can be displayed on site or on the upper plate (remote terminal computer). The traction rope 11 is almost motionless, so there will be no loss of sealing liquid, which is safe and reliable.

[0026] The present invention can be displayed on site or on a plate, has good sealing effect, the traction rope 11 is almost motionless, thus avoiding the loss of sealing liquid, is not easy to be damaged, is safe and reliable, and has a long service life.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An asphalt tank liquid level measuring device, characterized in that: It includes a float, a weight, a traction rope, a pulley and a weighing module; the traction rope is installed on the pulley, the traction rope is sealed with liquid, one end of the traction rope is connected to the float, the float is placed in the asphalt storage tank, the other end of the traction rope is connected to the weight, the weight is located outside the asphalt storage tank, and the weight is placed on the weighing module; the gravity of the float is greater than the buoyancy of the liquid asphalt, the weight of the weight is greater than the weight of the float, the weight of the weight is measured by the weighing module, and the weight difference between the weight and the float is taken as the lowest point of the liquid level. As the liquid level inside the asphalt storage tank rises, buoyancy is generated and gradually increases, the weight applied to the weighing module by the weight gradually increases, and the weight value measured by the weighing module gradually increases, forming a corresponding relationship between the measurement value of the weighing module and the liquid level, thereby measuring the liquid level of the asphalt storage tank.

2. The asphalt tank liquid level measuring device according to claim 1, characterized in that: It also includes a liquid level measuring port, a fixed tee, a connecting tee, a fixed connecting pipe, a liquid sealing pipe and a liquid sealing tank; the liquid level measuring port is fixedly connected to the top of the asphalt storage tank, the liquid level measuring port is connected to the fixed connecting pipe, the fixed connecting pipe is connected to the fixed tee, and the fixed tee is connected to the connecting tee; one end of the liquid sealing pipe is inserted into the liquid in the liquid sealing tank, and the other end is connected to the fixed tee.

3. The asphalt tank liquid level measuring device according to claim 2, characterized in that: A blind plate is provided at the end of the fixed three-way pipe, and a pulley is fixed on the blind plate. The pulley is located inside the fixed three-way pipe.

4. The asphalt tank liquid level measuring device according to claim 2, characterized in that: A blind plate is provided at the end of the connecting tee pipe, a pulley is fixed on the blind plate, and the pulley is located inside the connecting tee pipe.

5. The asphalt tank liquid level measuring device according to claim 2, characterized in that: A pulley is arranged at the bottom of the liquid sealing groove and fixed on a blind plate at the bottom of the liquid sealing groove. An observation hole is arranged on the blind plate at the top of the liquid sealing groove.

6. The asphalt tank liquid level measuring device according to claim 1, characterized in that: The floating bucket is a columnar floating bucket, and its height exceeds the liquid level height to be measured.

7. The asphalt tank liquid level measuring device according to claim 1, characterized in that: The weighing module is a compression weighing sensor or a single-point weighing sensor.

8. The asphalt tank liquid level measuring device according to claim 1, characterized in that: The weighing module is electrically connected to the liquid level recording instrument.

9. The asphalt tank liquid level measuring device according to claim 1, characterized in that: It also includes guide ropes, which are vertically fixed in the asphalt storage tank and located on both sides of the floating barrel.

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