Liquid level meter capable of preventing blockage, corrosion, high temperature and negative pressure damage

Abstract

The utility model discloses an anti-clogging, corrosion-resistant, high-temperature-resistant and anti-negative pressure damage liquid level meter, which comprises a large cavity balance cylinder, a floater is arranged in the large cavity balance cylinder, a floater positioning guide rod is longitudinally arranged in the large cavity balance cylinder, and first connecting cylinders are arranged at the upper end and the lower end of the outer wall of the large cavity balance cylinder in a penetrating manner; one end of the first connecting cylinder is provided with a liquidometer high-pressure flushing water connector, the other end of the first connecting cylinder is provided with a magnetostriction liquidometer flange connector, and second connecting cylinders are arranged at the upper end and the lower end of the outer wall of the large-cavity balance cylinder in a penetrating mode. The floater made of Hastelloy alloy is adopted, hydrogen corrosion can be effectively resisted, the problem that hydrogen atoms permeate and penetrate through an isolation diaphragm to chemically react with silicone oil is solved, the phenomenon that the diaphragm is concaved inwards and swelled is avoided, the structure that the large-cavity balance cylinder is combined with the longitudinal ring magnetic levitation ball positioning guide rod is adopted, the flow path is increased, and the service life is prolonged. The floater is ensured to move in a relatively fixed space, and the problems of blockage, movement and the like of the floater are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level measurement, in particular to a liquid level meter which is anti-clogging, corrosion-resistant, high-temperature-resistant and anti-negative-pressure-damage-resistant. Background Art

[0002] For level measurement in coal chemical gasification units, double-flange differential pressure transmitter-type level gauges are currently widely used. These gauges utilize the proportional relationship between liquid level and the differential pressure between the gas and liquid phases. The pressure differential is sensed by the diaphragms at the upper and lower pressure ports, and the liquid level is calculated based on the density of the medium. Diaphragm materials include Hastelloy C and 316L. However, these level gauges present numerous challenges. Firstly, the diaphragm is susceptible to damage. Under the ultra-high pressure, ultra-high temperature, contaminated, and high ash-volume conditions of the gasification furnace slag-water medium, hydrogen corrosion, wear, and negative pressure can occur. For example, stainless steel diaphragm welds are susceptible to hydrogen corrosion and fracture, while gold-plated diaphragms can be concave due to hydrogen permeation and reaction with silicone oil. Diaphragm bulging is also inevitable due to the associated chemical reactions. Measures such as thickening the diaphragm cannot fundamentally address the damage caused by wear and negative pressure, and thus affect measurement accuracy. Secondly, the measuring nozzle is easily clogged by sediments such as coal ash in the contaminated medium, resulting in unstable measurements. Utility Model Content

[0003] The purpose of the present utility model is to overcome the above problems or at least partially solve the above problems, and to propose a liquid level meter that is anti-clogging, corrosion-resistant, high-temperature-resistant, and anti-negative-pressure-damage.

[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a liquid level meter that is anti-clogging, corrosion-resistant, high-temperature resistant, and resistant to negative pressure damage, comprising a large-cavity balancing cylinder with a float installed inside, a float positioning guide rod being longitudinally arranged inside the large-cavity balancing cylinder, a first connecting cylinder being provided through both upper and lower ends of the outer wall of the large-cavity balancing cylinder, a liquid level gauge high-pressure flushing water interface being provided at one end of the first connecting cylinder, and a magnetostrictive liquid level gauge flange interface being provided at the other end, a second connecting cylinder being provided through both upper and lower ends of the outer wall of the large-cavity balancing cylinder, and the second connecting cylinder being located on the outside of the first connecting cylinder, a double-flange liquid level gauge positive pressure interface and a double-flange liquid level gauge negative pressure interface being provided at one end of the two second connecting cylinders, respectively, and the other ends of the two second connecting cylinders are connected to a measuring cylinder.

[0005] In a preferred embodiment, the first connecting cylinder located at the lower end of the outer wall of the large cavity balancing cylinder is bent downward near the flange interface of the magnetostrictive liquid level gauge.

[0006] In a preferred embodiment, third connecting cylinders are provided at both upper and lower ends of one side of the outer wall of the measuring cylinder, and the third connecting cylinder is connected to one end of the corresponding second connecting cylinder through a flange interface.

[0007] In a preferred embodiment, the float inside the large cavity balance cylinder is made of titanium alloy or Hastelloy.

[0008] In a preferred embodiment, the float positioning guide rods are longitudinal annular magnetic float ball positioning guide rods, and there are two of them, which increase the flow diameter while ensuring that the annular magnetic float ball moves in a fixed space.

[0009] In a preferred embodiment, the large cavity balancing cylinder is made of 316 stainless steel with a wall thickness of 7 mm.

[0010] Compared with existing technologies, this utility model provides a liquid level meter that is anti-clogging, corrosion-resistant, high-temperature resistant, and resistant to negative pressure damage. Its Hastelloy float effectively resists hydrogen corrosion, fundamentally addressing the problem of hydrogen atoms penetrating through the isolation diaphragm and reacting with silicone oil, thus preventing diaphragm concavity and bulging. The float material can be up to 1.2mm thick, significantly improving corrosion resistance and extending service life. The large-cavity balance cylinder is made of 7mm-thick 316 stainless steel, effectively preventing the effects of high temperature, high pressure, wear, and hydrogen corrosion on the core instrument measuring elements. The large-cavity balance cylinder, combined with a longitudinal magnetic float positioning guide rod, increases the flow path and ensures that the float moves within a relatively fixed space, preventing problems such as float jamming and movement. This fundamentally solves the problem of float jamming caused by slag water media. A flushing water connection is also included to address root valve blockage and ensure unobstructed flow of the measuring port. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the cross-sectional structure of the large cavity balance cylinder in the utility model;

[0013] Figure 3 A set of trend comparison charts for the liquid level display of the liquid level meter of the utility model and the double flange liquid level gauge;

[0014] Figure 4 Another set of trend comparison charts for the liquid level display of the liquid level meter of the utility model and the double flange liquid level gauge;

[0015] In the figure: 1. Large cavity balancing cylinder; 101. Float positioning guide rod; 2. First connecting cylinder; 3. High-pressure flushing water interface of liquid level gauge; 4. Flange interface of magnetostrictive liquid level gauge; 5. Second connecting cylinder; 6. Positive pressure interface of double flange liquid level gauge; 7. Negative pressure interface of double flange liquid level gauge; 8. Measuring cylinder; 9. Third connecting cylinder. DETAILED DESCRIPTION

[0016] The present invention will be described in further detail below with reference to the accompanying drawings.

[0017] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this description, those skilled in the art may make creative modifications to the embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0018] The utility model is a liquid level meter that is anti-clogging, corrosion-resistant, high-temperature-resistant, and anti-negative-pressure-damage, which solves the technical problems in the existing technology. The overall idea is as follows:

[0019] Example 1:

[0020] See also Figure 1 and Figure 2 A liquid level meter that is anti-clogging, corrosion-resistant, high-temperature resistant, and resistant to negative pressure damage, comprises a large-cavity balancing cylinder 1 with a float installed inside, a float positioning guide rod 101 is longitudinally arranged inside the large-cavity balancing cylinder 1, and first connecting cylinders 2 are provided through the upper and lower ends of the outer wall of the large-cavity balancing cylinder 1, one end of the first connecting cylinder 2 is provided with a liquid level gauge high-pressure flushing water interface 3, and the other end is provided with a magnetostrictive liquid level gauge flange interface 4, and second connecting cylinders 5 are also provided through the upper and lower ends of the outer wall of the large-cavity balancing cylinder 1, and the second connecting cylinder 5 is located on the outside of the first connecting cylinder 2, one end of the two second connecting cylinders 5 is respectively provided with a double-flange liquid level gauge positive pressure interface 6 and a double-flange liquid level gauge negative pressure interface 7, and the other end of the two second connecting cylinders 5 is connected to a measuring cylinder 8;

[0021] With such arrangement, the design of the large cavity balance cylinder 1 combined with the float positioning guide rod 101 increases the flow path, ensures that the float moves in a relatively fixed space, and avoids problems such as float jamming and movement.

[0022] During specific implementation, the first connecting cylinder 2 located at the lower end of the outer wall of the large cavity balancing cylinder 1 is bent downward near the position of the magnetostrictive liquid level gauge flange interface 4 .

[0023] In a specific implementation, third connecting tubes 9 are provided at both upper and lower ends of one side of the outer wall of the measuring tube 8 , and the third connecting tube 9 is connected to one end of the corresponding second connecting tube 5 through a flange interface.

[0024] In specific implementation, the float inside the large-cavity balance cylinder 1 is made of titanium alloy or Hastelloy. The float made of Hastelloy can effectively resist hydrogen corrosion, fundamentally solve the problem of hydrogen atoms penetrating through the isolation diaphragm and reacting chemically with silicone oil, and avoid the concave and bulging phenomena of the diaphragm. The thickness of the float material can reach 1.2mm, which significantly improves the corrosion resistance and extends the service life.

[0025] In a specific implementation, the float positioning guide rods 101 are longitudinal annular magnetic float ball positioning guide rods, and there are two of them, which can increase the flow path while ensuring that the annular magnetic float ball moves in a fixed space.

[0026] In specific implementation, the large cavity balancing cylinder 1 is made of 316 stainless steel with a wall thickness of 7 mm, which can effectively prevent the influence of high temperature, high pressure, wear and hydrogen corrosion of the medium on the core instrument measuring elements.

[0027] See also Figure 3 and Figure 4 , providing two sets of trend comparison charts. Starting in 2019, an oversized magnetostrictive level gauge was added to the cyclone separator and scrubber of the Thorpe gasification unit, simultaneously measuring liquid levels alongside the original double-flange level gauge. To date, both gauges have provided accurate measurements with no damage or maintenance. The service life is longer than that of the double-flange gauge, and the level gauge is more accurate than the double-flange gauge during start-up and shutdown.

[0028] like Figure 3 As shown in the figure, after the ultra-large cavity magnetostrictive liquid level gauge was put into use on December 21, 2019, it was able to accurately display the liquid level during the start-up of the gasifier, while the double flange liquid level gauge caused false liquid level display due to large system pressure fluctuations.

[0029] like Figure 4 As shown, after the ultra-large cavity magnetostrictive level gauge was put into use on September 25, 2023, the liquid level display was basically consistent with that of the double flange level gauge. The magnetostrictive level gauge has been in use for nearly 4 years and has been in good condition without any faults.

[0030] The above description of the embodiments is to facilitate ordinary technicians in this technical field to understand and use the present invention. It is obvious that those familiar with the technology in this field can easily make various modifications to the embodiments and apply the general principles described herein to other embodiments without having to engage in creative work. Therefore, the present invention is not limited to the above embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A liquid level meter that is resistant to clogging, corrosion, high temperature, and negative pressure damage, characterized by: The invention comprises a large cavity balancing cylinder (1) with a float installed therein, a float positioning guide rod (101) is longitudinally arranged in the large cavity balancing cylinder (1), a first connecting cylinder (2) is provided through the upper and lower ends of the outer wall of the large cavity balancing cylinder (1), one end of the first connecting cylinder (2) is provided with a liquid level gauge high-pressure flushing water interface (3), and the other end thereof is provided with a magnetostrictive liquid level gauge flange interface (4), a second connecting cylinder (5) is also provided through the upper and lower ends of the outer wall of the large cavity balancing cylinder (1), and the second connecting cylinder (5) is located outside the first connecting cylinder (2), one end of the two second connecting cylinders (5) is respectively provided with a double-flange liquid level gauge positive pressure interface (6) and a double-flange liquid level gauge negative pressure interface (7), and the other end of the two second connecting cylinders (5) is connected to a measuring cylinder (8).

2. The anti-clogging, corrosion-resistant, high-temperature-resistant, and negative-pressure-damaged liquid level meter according to claim 1, characterized in that: The first connecting cylinder (2) located at the lower end of the outer wall of the large cavity balancing cylinder (1) is bent downward near the position of the magnetostrictive liquid level gauge flange interface (4).

3. The anti-clogging, corrosion-resistant, high-temperature-resistant, and negative-pressure-damaged liquid level meter according to claim 2, characterized in that: A third connecting tube (9) is provided at both upper and lower ends of one side of the outer wall of the measuring tube (8), and the third connecting tube (9) is connected to one end of the corresponding second connecting tube (5) through a flange interface.

4. The anti-clogging, corrosion-resistant, high-temperature-resistant, and negative-pressure-damaged liquid level meter according to claim 3, characterized in that: The float inside the large cavity balancing cylinder (1) is made of titanium alloy or Hastelloy.

5. The anti-clogging, corrosion-resistant, high-temperature-resistant, and negative-pressure-damaged liquid level meter according to claim 4, characterized in that: The float positioning guide rods (101) are longitudinal annular magnetic floating ball positioning guide rods, and there are two of them, which increase the flow diameter while ensuring that the annular magnetic floating ball moves in a fixed space.

6. The anti-clogging, corrosion-resistant, high-temperature-resistant, and negative-pressure-damaged liquid level meter according to claim 5, characterized in that: The large cavity balancing cylinder (1) is made of 316 stainless steel and has a wall thickness of 7 mm.

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