Magnetic flap floater liquid level meter
By introducing a pressure sensor and a filter structure into the magnetic float level gauge, the problem of methanol storage tank level gauges being susceptible to non-condensable gases and impurities has been solved, enabling remote monitoring of level data and impurity filtration, thus improving the accuracy and safety of the measurement.
Patent Information
- Application Number
- CN202423024408.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing methanol storage tank level gauges are susceptible to non-condensable gases and impurities, leading to data fluctuations and errors, increasing on-site workload and affecting measurement accuracy.
A pressure sensor and a filter structure are introduced into the magnetic float level gauge to enable remote monitoring of level data. Impurities are filtered through a sleeve, magnetic rod, and filter barrel to prevent them from entering the measuring cylinder.
It improves the accuracy and stability of liquid level display, reduces on-site workload, ensures safe operation, and enhances measurement reliability.
Smart Images
Figure CN223500482U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tank level gauges for tank farms, specifically to a magnetic float level gauge. Background Technology
[0002] In tank farms where most storage tanks are at atmospheric or slightly positive pressure, the stable operation and display of magnetic float level gauges are crucial for ensuring the safe use of these tanks. Existing methanol storage tank level gauges are divided into remote level gauges (wire-guided radar level gauges) and local level gauges (magnetic float level gauges). During normal operation of the production unit, methanol transported from external units contains non-condensable gases, which can easily cause fluctuations in the remote level gauge. Due to these large fluctuations, on-site personnel are required to verify the local level gauge to ensure the accuracy and reliability of the data during operation, increasing the workload of on-site personnel. Simultaneously, during the process of methanol synthesis and transportation to the tank farm, the long pipelines and long-term use can lead to the formation of impurities such as iron filings in the methanol solution. When these magnetic impurities enter the measuring cylinder, they adhere to the surface of the magnetic float, easily causing the float to jam or sink to the bottom of the pipe due to increased weight, resulting in level gauge malfunction or errors. Utility Model Content
[0003] This invention addresses the shortcomings of existing technologies by providing a magnetic float level gauge that displays the level readings on the backend system without altering the existing level gauge, thereby reducing the workload of staff. Simultaneously, it filters impurities, preventing the magnetic float from becoming clogged.
[0004] To achieve the above technical objectives, this utility model proposes the following technical solution: a magnetic float level gauge, comprising a measuring cylinder, a flap tube and a scale indicator plate disposed on the front side of the measuring cylinder, an inlet pipe and an outlet pipe disposed on the outer wall of the measuring cylinder, a magnetic float disposed inside the measuring cylinder, and a plurality of magnetic flaps disposed inside the flap tube, wherein a drain pipe is connected to the bottom of the measuring cylinder via a flange, a liquid guiding valve and a drain valve are disposed on the drain pipe, a connecting pipe is connected to the drain pipe between the liquid guiding valve and the drain valve, and a pressure sensor is disposed at the end of the connecting pipe.
[0005] Furthermore, a pressure sensor inlet valve is provided on the connecting pipe.
[0006] Furthermore, the feed pipe is connected to a T-shaped pipe at its end. The branch ports of the T-shaped pipe are sealed, and several sleeves with one end open and communicating with the outside are provided inside the branch ports of the T-shaped pipe. The bottom of the sleeves extends into the inner wall of the T-shaped pipe inside the branch ports, and each sleeve is fitted with a magnetic rod.
[0007] Furthermore, both the inlet and outlet ends of the tee pipe are equipped with flanges.
[0008] Furthermore, several of the magnetic rods are connected by a disk, and the disk is provided with a handle.
[0009] Furthermore, a filter bucket is provided inside the three-way pipe at the outlet end, and the open end of the filter bucket is attached to the outer wall of the sleeve.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses a pressure sensor to transfer the local liquid level to the distributed control system (DCS) without damaging or affecting the original magnetic float level gauge. When used in conjunction with a wire-guided radar level gauge, it can display dual liquid levels, increasing the accuracy of the liquid level display and providing a favorable guarantee for safe and stable operation. Through the combined use of structures such as sleeves, magnetic rods, and filter barrels, magnetic and non-magnetic impurities in methanol liquid can be filtered out, preventing impurities from entering the measuring cylinder and affecting the accuracy of the magnetic float level gauge measurement. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0012] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;
[0013] Figure 3 This is a schematic diagram of the structure of the tee pipe of this utility model;
[0014] Figure 4 This is a schematic diagram of the structure of the present invention when the magnetic rod is removed from the sleeve.
[0015] In the diagram, 1. Measuring cylinder; 2. Flip plate; 3. Scale indicator plate; 4. Feed pipe; 5. Discharge pipe; 6. Magnetic float; 7. Magnetic flap; 8. Drain pipe; 9. Liquid guide valve; 10. Drain valve; 11. Connecting pipe; 12. Pressure sensor; 13. Pressure sensor inlet valve; 14. T-connector; 15. Sleeve; 16. Magnetic rod; 17. Flange; 18. Disc; 19. Handle; 20. Filter barrel. Detailed Implementation
[0016] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0017] like Figure 1-4As shown, this utility model provides a magnetic float level gauge, including a measuring cylinder 1, a flap tube 2 and a scale indicator plate 3 arranged on the front side of the measuring cylinder 1, an inlet pipe 4 and an outlet pipe 5 provided on the outer wall of the measuring cylinder 1, both the inlet pipe 4 and the outlet pipe 5 are connected to the tank body of the storage tank through flanges, which facilitates the installation or disassembly of the magnetic float level gauge. A magnetic float 6 that floats with the liquid medium is provided inside the measuring cylinder 1, and a plurality of magnetic flaps 7 are provided inside the flap tube 2. A drain pipe 8 is connected to the bottom of the measuring cylinder 1 through a flange. A liquid guide valve 9 and a drain valve 10 are provided on the drain pipe 8. A connecting pipe 11 is connected to the drain pipe 8 between the liquid guide valve 9 and the drain valve 10. A pressure sensor 12 is provided at the end of the connecting pipe 11.
[0018] like Figure 1 and 2 As shown in this embodiment, since the magnetic float level gauge is existing technology, its working principle will not be elaborated here. The pressure sensor 12 detects the pressure signal in the connecting pipe 11 and displays it in the distributed control system (DCS). This eliminates the need for personnel to verify the level gauge at the storage tank site, ensuring the reliability of the data during operation. In use, the drain valve 10 is closed, and the liquid guide valve 9 is opened. The methanol liquid in the measuring cylinder 1 will enter the connecting pipe 11 along the drain pipe 8. The pressure sensor 12 is used to detect the pressure in the connecting pipe 11. As the methanol content in the storage tank increases, the liquid level in the measuring cylinder 1 will rise. When the measuring cylinder 1 and the connecting pipe 11 are in a connected state, the increase in methanol in the measuring cylinder 1 will also increase the pressure in the connecting pipe 11. During sewage discharge, the liquid guide valve 9 is closed and the drain valve 10 is opened to change the flow direction of methanol in the measuring cylinder 1 and drain the liquid in the measuring cylinder 1. The pressure sensor 12 is installed at the end of the connecting pipe 11 away from the sewage pipe 8, which is relatively convenient to install. The local liquid level is transferred to the distributed control system (DCS). At the same time, this utility model does not damage or affect the original magnetic float level gauge's on-site measurement. Combined with the linear radar level gauge, it can display dual liquid levels, which increases the accuracy of the liquid level display and provides a favorable guarantee for safe and stable operation.
[0019] The connecting pipe 11 is equipped with a pressure sensor inlet valve 13.
[0020] like Figure 1 As shown, the pressure sensor inlet valve 13 controls the opening and closing of the pressure sensor 12.
[0021] The feed pipe 4 is connected to a three-way pipe 14 at one end. The branch port of the three-way pipe 14 is sealed. Several sleeves 15 with one end open and communicating with the outside are provided in the branch port of the three-way pipe 14. The bottom of the sleeves 15 extends into the inner wall of the three-way pipe 14 in the branch port. A magnetic rod 16 is installed in each sleeve 15. The inlet and outlet ends of the three-way pipe 14 are provided with flanges 17.
[0022] like Figure 3 and 4 As shown, after the magnetic rod 16 is inserted into the sleeve 15, the sleeve 15 also becomes magnetic. When the methanol liquid flows from the inlet end of the three-way pipe 14 to the measuring cylinder 1, it will pass through the sleeve 15. The sleeve 15 adsorbs the magnetic impurities in the methanol liquid, thereby purifying the methanol. In use, the inlet and outlet ends of the three-way pipe 14 are connected to the storage tank body and the liquid inlet pipe 4 respectively through the flange 17, which can be conveniently disassembled and maintained regularly. When it is necessary to remove the magnetic impurities on the sleeve 15, simply disassemble the three-way pipe 14 and take out the magnetic rod 16. The magnetic impurities on the sleeve 15 will naturally fall off, making the cleaning more convenient and quick.
[0023] Several magnetic rods 16 are connected by a disk 18, and the disk 18 is provided with a handle 19.
[0024] like Figure 4 As shown, by pulling the handle 19, the magnetic rod 16 can be easily removed from the sleeve 15. Due to the magnetism of the magnetic rod 16, the disc 18 will not fall off at the branch port of the tee pipe 14. Without the action of external force, the disc 18 will not fall off, and no additional fixing structure is needed to fix the disc 18.
[0025] A filter bucket 20 is provided inside the three-way pipe 14 and at the outlet end, with the open end of the filter bucket 20 attached to the outer wall of the sleeve 15.
[0026] like Figure 3 As shown, the open end of the filter barrel 20 is made of magnetic material, which makes it easy to adsorb the filter barrel 20 onto the sleeve 15. The filter barrel 20 can filter out non-magnetic impurities in the methanol liquid, preventing impurities from entering the measuring cylinder 1 and affecting the accuracy of the magnetic float level gauge.
[0027] Operating Principle: During operation, close the drain valve 10 and open the liquid inlet valve 9 and pressure sensor inlet valve 13. Methanol from the storage tank enters the measuring cylinder 1 sequentially through the three-way pipe 14 and the inlet pipe 4. During its flow through the three-way pipe 14, the sleeve 15 adsorbs magnetic impurities carried in the methanol liquid, and the filter removes other particulate impurities. The purified methanol enters the measuring cylinder 1. Due to the floating of the liquid, the magnetic float 6 rises, causing the magnetic flap 7 to flip. As the methanol content in the storage tank increases, the liquid level in the measuring cylinder 1 rises. Because the measuring cylinder 1 is connected to the connecting pipe 11, the increase in the amount of methanol in the measuring cylinder 1 also causes the liquid level in the connecting pipe 11 to rise. As the pressure increases, the pressure sensor 12 detects the pressure value in the connecting pipe 11 and displays the pressure signal to the distributed control system (DCS). When used in conjunction with this wire-guided radar level gauge, dual level display can be achieved, increasing the accuracy of the level display. During drainage, the liquid guide valve 9 and the pressure sensor inlet valve 13 are closed, and the drain valve 10 is opened to change the flow direction of methanol in the measuring cylinder 1, thereby emptying the liquid in the measuring cylinder 1. After a period of use, when it is necessary to clean the impurities in the three-way pipe 14, the three-way pipe 14 is disassembled, and the handle 19 is pulled to remove the magnetic rod 16 from the sleeve 15. The magnetic impurities on the sleeve 15 and the filter bucket 20 will fall off for easy cleaning.
[0028] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. A magnetic float level gauge, comprising a measuring cylinder (1), a flap tube (2) and a scale indicator plate (3) disposed on the front side of the measuring cylinder (1), an inlet pipe (4) and an outlet pipe (5) disposed on the outer wall of the measuring cylinder (1), a magnetic float (6) disposed inside the measuring cylinder (1), and a plurality of magnetic flaps (7) disposed inside the flap tube (2), characterized in that: The bottom of the measuring cylinder (1) is connected to a drain pipe (8) via a flange. The drain pipe (8) is equipped with a liquid guide valve (9) and a drain valve (10). A connecting pipe (11) is connected to the drain pipe (8) between the liquid guide valve (9) and the drain valve (10). A pressure sensor (12) is provided at the end of the connecting pipe (11).
2. The magnetic float level gauge according to claim 1, characterized in that: The connecting pipe (11) is equipped with a pressure sensor inlet valve (13).
3. The magnetic float level gauge according to claim 1, characterized in that: The feed pipe (4) is connected to a three-way pipe (14) at the end. The branch port of the three-way pipe (14) is sealed. The branch port of the three-way pipe (14) is provided with several sleeves (15) with one end open and communicating with the outside. The bottom of the sleeve (15) extends into the inner wall of the three-way pipe (14) in the branch port. Each sleeve (15) is fitted with a magnetic rod (16).
4. A magnetic float level gauge according to claim 3, characterized in that: The tee pipe (14) is equipped with flanges (17) at both the inlet and outlet ends.
5. A magnetic float level gauge according to claim 3, characterized in that: Several magnetic rods (16) are connected by a disk (18), and the disk (18) is provided with a handle (19).
6. A magnetic float level gauge according to claim 3, characterized in that: The three-way pipe (14) is provided with a filter barrel (20) at the outlet end, and the open end of the filter barrel (20) is attached to the outer wall of the sleeve (15).