LNG (Liquefied Natural Gas) liquid level measuring device

Abstract

The utility model relates to the technical field of natural gas storage, in particular to an LNG (Liquefied Natural Gas) liquid level measuring device which is directly communicated with the interior of a storage tank through a bypass structure so as to directly obtain liquid level height data in the storage tank, and the liquid level height data is measured through the measuring device. An operator can conveniently clean and maintain the measuring device through the cleaning device, so that the practicability of the device is improved; comprising a bypass structure, a measuring device and a cleaning device, the measuring device is installed on the bypass structure, and the cleaning device is installed on the bypass structure.

Description

Technical Field

[0001] This utility model relates to the technical field of natural gas storage, and in particular to an LNG level measuring device. Background Technology

[0002] Natural gas refers to all gases that exist naturally in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere (including oilfield gas, gas field gas, mud volcano gas, coalbed methane, and biogenic gas). However, the commonly used definition of natural gas, from an energy perspective, is a narrower definition, referring to a mixture of hydrocarbon and non-hydrocarbon gases naturally occurring in underground strata. In petroleum geology, it usually refers to oilfield gas and gas field gas. Its composition is mainly hydrocarbons, but it also contains non-hydrocarbon gases. Natural gas is found in porous underground rock formations, including oilfield gas, gas field gas, coalbed methane, mud volcano gas, and biogenic gas, with small amounts also found in coal seams. It is a high-quality fuel and chemical raw material. Natural gas is primarily used as fuel and can be used to manufacture carbon black, chemicals, and liquefied petroleum gas. Propane and butane produced from natural gas are important raw materials for modern industry. Radar level gauges are general-purpose radar level gauges. They are measuring instruments based on the time-of-flight principle; radar waves travel at the speed of light, and the travel time can be converted into a level signal by electronic components. The probe emits high-frequency pulses that travel at the speed of light in space. When the pulses encounter the material surface, they are reflected back and received by the receiver inside the instrument, which then converts the distance signal into a level signal.

[0003] The existing Chinese utility model patent with application number CN201920814527.6 relates to a liquid level measurement and control device for LNG production storage tanks, including a measuring cylinder, a storage tank, a fixing ring, a spring, a sliding plate, an input pipe, a connecting rod, and a squeezing block, etc. It can control the opening and closing of the input pipe control valve and the output pipe control valve according to the change of the weight of the storage tank, with a high degree of automation and more convenient use.

[0004] However, in actual use, the above-mentioned devices have insufficient accuracy in measuring the real-time liquid level in the storage tank, and the method of judging the liquid level by the mass of the storage tank is subject to high requirements of the external environment, and the data is easily affected by the external environment. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an LNG liquid level measuring device that directly connects to the inside of the storage tank through a bypass structure to directly obtain the liquid level data in the storage tank, measures the liquid level data through a measuring device, and facilitates cleaning and maintenance of the measuring device by operators, thereby improving the practicality of the device.

[0006] This utility model discloses an LNG liquid level measuring device, comprising a bypass structure, a measuring device, and a cleaning device. The measuring device is installed on the bypass structure, and the cleaning device is also installed on the bypass structure. The bypass structure directly connects to the inside of the storage tank to directly obtain the liquid level data in the storage tank. The measuring device measures the liquid level data, and the cleaning device facilitates cleaning and maintenance of the measuring device by the operator, thus improving the practicality of the device.

[0007] Preferably, the bypass structure includes a storage tank, a bypass pipe, an insulation layer, and a filter screen. The two ends of the bypass pipe are connected to the upper and lower parts of the side of the storage tank, respectively. An insulation layer is fitted onto the bypass pipe, and a horizontal section is provided at the bottom of the bypass pipe. A filter screen is installed at an angle in the horizontal section of the bypass pipe. The bypass pipe connects to the inside of the storage tank to facilitate measurement of the liquid level in the tank by a measuring device. The insulation layer keeps the liquefied natural gas in the bypass pipe warm, reducing the impact of external temperature on the liquefied natural gas. The filter screen filters the liquefied natural gas entering the bypass pipe, reducing the amount of impurities entering the bypass pipe. The angled installation of the filter screen facilitates the return of impurities filtered out to the inside of the storage tank, improving the practicality of the device.

[0008] Preferably, the measuring device includes a measuring chamber, a flange, and a radar level gauge. The measuring chamber is located at the upper part of the bypass pipe, and a flange is located on the upper surface of the measuring chamber. The radar level gauge is connected to the upper surface of the measuring chamber through the flange, and the sensing end of the radar level gauge extends to the bottom of the measuring chamber. The measuring chamber and flange provide installation space for the radar level gauge and facilitate its disassembly and maintenance. The radar level gauge monitors the liquid level data in the bypass pipe, thus improving the practicality of the device.

[0009] Preferably, the cleaning device includes a bearing, a rotating platform, limiting protrusions, a rotating disk, a cleaning groove, detection holes, and brush bristles. A bearing is installed at the bottom of the measuring chamber. The lower part of the rotating platform is inserted into the inner ring of the bearing and connected to it. Multiple sets of limiting protrusions are evenly arranged on the upper surface of the rotating platform. Circular insertion holes are provided on the rotating disk corresponding to the positions of the multiple sets of limiting protrusions. A cleaning groove is provided in the middle of the rotating disk, and the cleaning groove is recessed downwards. Two sets of detection holes are symmetrically arranged about the center of the cleaning groove on the upper surface of the cleaning groove. Bristles are provided on the upper surface of the cleaning groove, with the cleaning end of the bristles higher than the center of the groove. The upper end face of the detection hole; the rotating platform and the device on the rotating platform are enabled to rotate by bearings. The sensing end of the radar level gauge can be located on the upper side of the detection hole, so as to measure the liquid level data in the bypass pipe through the detection hole. The installation position of the rotating disk is limited by the limiting protrusion to prevent relative rotation between the rotating platform and the rotating disk. When the rotating platform rotates, it drives the bristles on the cleaning tank to rotate, thereby cleaning the sensing end of the radar level gauge, reducing the labor intensity of the operator in the equipment cleaning process and improving the practicality of the device.

[0010] Preferably, the device also includes an arc-shaped steel plate, an arc-shaped sliding limit groove, and an arc-shaped magnet. Two sets of arc-shaped steel plates are symmetrically arranged on the upper edge of the rotating disk about the center of the rotating disk itself. An arc-shaped sliding limit groove is provided in the middle of the outer side of the measuring chamber. The arc-shaped magnet is located in the arc-shaped sliding limit groove on the outer side of the measuring chamber and can attract the arc-shaped steel plate. By attracting the arc-shaped steel plate with the arc-shaped magnet and rotating the position of the arc-shaped magnet on the outer side of the measuring chamber, the arc-shaped steel plate and the rotating platform and brush connected to the arc-shaped steel plate are driven to rotate. This allows the operator to clean the sensing end of the radar level gauge without disassembling the radar level gauge, improving the practicality of the device.

[0011] Preferably, it also includes a fastening bolt and a nut. A nut is provided at a point on the side of the arc-shaped sliding limit groove, and a fastening bolt is connected to the side of the arc-shaped magnet through the nut. When the fastening bolt is rotated to the position of the nut, the sensing end of the radar level gauge is located above a set of detection holes. The line connecting the two sets of arc-shaped steel plates and the centers of the two sets of detection holes forms a cross shape. By rotating the fastening bolt, the fastening bolt presses the nut, thereby fixing the position of the arc-shaped magnet and the arc-shaped steel plate, reducing the impact of the rotating disk's own shaking on the radar level gauge monitoring data. At the same time, during the rotation of the arc-shaped magnet, the arc-shaped steel plate may fail to directly follow the rotation of the arc-shaped magnet or may be misaligned. When the arc-shaped magnet is secondarily attracted to any set of arc-shaped steel plates, bringing the arc-shaped steel plate to the position of the nut will ensure that the sensing end of the radar level gauge is located above a set of detection holes.

[0012] Preferably, it also includes a handle, with a handle provided on the upper part of the curved steel plate; the handle facilitates the operator to quickly install, remove, and place the rotating disc, improving the practicality of the device.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: it directly connects to the inside of the storage tank through the bypass structure, so as to directly obtain the liquid level data in the storage tank; the liquid level data is measured by the measuring device; and the measuring device is easy for operators to clean and maintain, thus improving the practicality of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the first isometric structure of this utility model;

[0015] Figure 2 This is a first cross-sectional structural diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the second cross-sectional structure of this utility model;

[0017] Figure 4 This is a partially enlarged structural schematic diagram of the present invention;

[0018] The following are labels in the attached diagram: 1. Storage tank; 2. Bypass pipe; 3. Insulation layer; 4. Filter screen; 5. Measuring chamber; 6. Flange; 7. Radar level gauge; 8. Bearing; 9. Rotating platform; 10. Limiting protrusion; 11. Rotating disk; 12. Cleaning groove; 13. Detection hole; 14. Brush bristles; 15. Curved steel plate; 16. Curved sliding limit groove; 17. Curved magnet; 18. Fastening bolt; 19. Nut; 20. Handle. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0020] Example 1

[0021] Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the measuring device is installed on the bypass structure, and the cleaning device is installed on the bypass structure;

[0022] First, the liquid level in the bypass pipe 2 is detected by the sensing end of the radar level gauge 7. When there is dirt at the sensing end of the radar level gauge 7 that needs to be cleaned, the arc magnet 17 is rotated to attract the arc steel plate 15 and drive the arc steel plate 15 to rotate, thereby driving the bristles 14 to clean the sensing end of the radar level gauge 7. Then, a set of arc steel plates 15 is brought to the position of the nut 19 and the fastening bolt 18 is rotated to fix the position of the arc magnet 17.

[0023] The bypass structure includes a storage tank 1, a bypass pipe 2, an insulation layer 3, and a filter screen 4. The two ends of the bypass pipe 2 are connected to the upper and lower parts of the side of the storage tank 1, respectively. The insulation layer 3 is fitted on the bypass pipe 2. A horizontal part is provided at the lower part of the bypass pipe 2. The filter screen 4 is installed at an angle in the horizontal part of the bypass pipe 2.

[0024] The measuring device includes a measuring chamber 5, a flange 6, and a radar level gauge 7. The measuring chamber 5 is located at the top of the bypass pipe 2. The flange 6 is located on the upper surface of the measuring chamber 5. The radar level gauge 7 is connected to the upper surface of the measuring chamber 5 through the flange 6. The sensing end of the radar level gauge 7 extends to the bottom of the measuring chamber 5.

[0025] The cleaning device includes a bearing 8, a rotating platform 9, limiting protrusions 10, a rotating disk 11, a cleaning groove 12, detection holes 13, and brush bristles 14. The bearing 8 is installed at the bottom of the measuring chamber 5. The lower part of the rotating platform 9 is inserted into the inner ring of the bearing 8 and connected to the bearing 8. Multiple sets of limiting protrusions 10 are evenly arranged on the upper surface of the rotating platform 9. Circular insertion holes are arranged on the rotating disk 11 corresponding to the positions of the multiple sets of limiting protrusions 10. A cleaning groove 12 is arranged in the middle of the rotating disk 11. The cleaning groove 12 is recessed to the lower side. Two sets of detection holes 13 are symmetrical about the center of the cleaning groove 12 on the upper surface of the cleaning groove 12. Brush bristles 14 are arranged on the upper surface of the cleaning groove 12. The cleaning end of the brush bristles 14 is higher than the upper surface of the detection holes 13.

[0026] It also includes an arc-shaped steel plate 15, an arc-shaped sliding limit groove 16, and an arc-shaped magnet 17. Two sets of arc-shaped steel plates 15 are symmetrically arranged on the upper edge of the rotating disk 11 about the center of the rotating disk 11 itself. An arc-shaped sliding limit groove 16 is provided in the middle of the outer side of the measuring chamber 5. The arc-shaped magnet 17 is located in the arc-shaped sliding limit groove 16 on the outer side of the measuring chamber 5 and can attract the arc-shaped steel plate 15.

[0027] It also includes fastening bolts 18 and nuts 19. A nut 19 is provided at a point on the side of the arc-shaped sliding limit groove 16. A fastening bolt 18 is connected to the side of the arc-shaped magnet 17 through a nut. When the fastening bolt 18 is rotated to the position of the nut 19, the sensing end of the radar level gauge 7 is located above a set of detection holes 13. The line connecting the center of the two sets of arc-shaped steel plates 15 and the center of the two sets of detection holes 13 forms a cross shape.

[0028] It also includes a handle 20. The upper part of the arc-shaped steel plate 15 is provided with a handle 20, which is directly connected to the inside of the storage tank through a bypass structure, so as to directly obtain the liquid level data in the storage tank. The liquid level data is measured by a measuring device, and the measuring device is easy for operators to clean and maintain, thus improving the practicality of the device.

[0029] like Figures 1 to 4 As shown, this utility model discloses an LNG liquid level measuring device. When in operation, it first detects the liquid level in the bypass pipe 2 through the sensing end of the radar level gauge 7. When there is dirt on the sensing end of the radar level gauge 7 that needs to be cleaned, the arc-shaped magnet 17 is rotated to attract the arc-shaped steel plate 15 and drive the arc-shaped steel plate 15 to rotate, thereby driving the bristles 14 to clean the sensing end of the radar level gauge 7. After that, a set of arc-shaped steel plates 15 is brought to the position of the nut 19, and the fastening bolt 18 is rotated to fix the position of the arc-shaped magnet 17.

[0030] The radar level gauge 7 of the LNG liquid level measuring device of this utility model is purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An LNG level measuring device; characterized by, The device includes a bypass structure, a measuring device, and a cleaning device. The measuring device is installed on the bypass structure, and the cleaning device is installed on the bypass structure. The bypass structure includes a storage tank (1), a bypass pipe (2), an insulation layer (3), and a filter screen (4). The two ends of the bypass pipe (2) are connected to the upper and lower parts of the side of the storage tank (1), respectively. The insulation layer (3) is fitted on the bypass pipe (2). A horizontal part is provided at the lower part of the bypass pipe (2). A filter screen (4) is installed obliquely in the horizontal part of the bypass pipe (2). The measuring device includes a measuring chamber (5), a flange (6), and a radar level gauge (7). A measuring chamber (5) is provided at the upper part of the bypass pipe (2). A flange (6) is provided on the upper end face of the measuring chamber (5). The radar level gauge (7) is connected to the upper end face of the measuring chamber (5) through the flange (6). The sensing end of the radar level gauge (7) extends to the bottom of the measuring chamber (5). The cleaning device includes a bearing (8), a rotating platform (9), a limiting protrusion (10), a rotating disk (11), a cleaning groove (12), a detection hole (13), and bristles (14). The bearing (8) is installed at the bottom of the measuring chamber (5). The lower part of the rotating platform (9) is inserted into the inner ring of the bearing (8) and connected to the bearing (8). Multiple sets of limiting protrusions (10) are evenly arranged on the upper surface of the rotating platform (9). Circular insertion holes are provided on the rotating disk (11) corresponding to the positions of the multiple sets of limiting protrusions (10). A cleaning groove (12) is provided in the middle of the rotating disk (11). The cleaning groove (12) is recessed to the lower side. Two sets of detection holes (13) are symmetrical about the center of the cleaning groove (12) on the upper surface of the cleaning groove (12). Bristles (14) are provided on the upper surface of the cleaning groove (12). The cleaning end of the bristles (14) is higher than the upper surface of the detection hole (13).

2. An LNG level measuring device as claimed in claim 1, characterized in that It also includes an arc-shaped steel plate (15), an arc-shaped sliding limit groove (16), and an arc-shaped magnet (17). Two sets of arc-shaped steel plates (15) are symmetrically arranged on the upper edge of the rotating disk (11) about the center of the rotating disk (11). An arc-shaped sliding limit groove (16) is provided in the middle of the outer side of the measuring chamber (5). The arc-shaped magnet (17) is located in the arc-shaped sliding limit groove (16) on the outer side of the measuring chamber (5) and can attract the arc-shaped steel plate (15).

3. An LNG level measuring device as claimed in claim 2, characterised in that It also includes fastening bolts (18) and nuts (19). A nut (19) is provided at a point on the side of the arc-shaped sliding limit groove (16). A fastening bolt (18) is connected to the side of the arc-shaped magnet (17) by a nut. When the fastening bolt (18) rotates to the position of the nut (19), the sensing end of the radar level gauge (7) is located above a set of detection holes (13). The line connecting the center of the two sets of arc-shaped steel plates (15) and the center of the two sets of detection holes (13) forms a cross shape.

4. An LNG level measuring device as claimed in claim 3, characterised in that It also includes a handle (20), which is provided on the upper part of the curved steel plate (15).

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