A guided wave radar level gauge with waveguide tube for measuring low-temperature, easily solidified materials.

Abstract

This utility model belongs to the field of radar level gauge technology, specifically disclosing a guided wave radar level gauge waveguide tube for measuring low-temperature, easily solidified materials. It includes a radar level gauge and a waveguide rod fixed to the lower end of the radar level gauge. A heating mechanism for heating the waveguide rod is sleeved on its exterior. The heating mechanism is connected to the upper end of the waveguide rod via a flange assembly. The heating mechanism includes an inner tube, an outer tube, and a steel plate. The flange assembly has a steam inlet and a steam outlet communicating with a steam chamber. This utility model, by adding a heating mechanism to the outside of the waveguide rod, allows steam supplied by a steam-providing device to be introduced into the steam chamber through the steam inlet during use. The steam heats the space around the waveguide rod and the materials, preventing solidification on the waveguide rod and avoiding inaccurate level detection due to material solidification. This improves the accuracy and stability of the radar level gauge measurement.

Description

Technical Field

[0001] This utility model relates to the field of radar level gauge technology, specifically a guided wave radar level gauge waveguide tube that can measure low-temperature, easily solidified materials. Background Technology

[0002] Guided wave radar level gauges are based on the time-domain reflectometry principle. They use a waveguide to guide the propagation of electromagnetic pulses and measure the echo time difference to calculate the liquid level height. However, conventional guided wave radar level gauges on the market face numerous challenges when dealing with low-temperature and easily solidified media. In low-temperature environments, these media are prone to solidification, altering their physical properties such as increased density, viscosity, and dielectric constant. This affects electromagnetic pulse propagation and reflection, reducing measurement accuracy. Furthermore, solidification can cause deposits to adhere to the surface of the waveguide or cable, interfering with the normal propagation of electromagnetic pulses, leading to measurement errors or even malfunctions. Additionally, low temperatures can affect the performance of the level gauge's electronic components, significantly reducing the stability and reliability of the measurement system and thus impacting the accuracy of the guided wave radar level gauge. Therefore, we need to propose a guided waveguide for measuring low-temperature, easily solidified materials to address these problems, preventing material solidification on the waveguide and improving the accuracy and stability of the level gauge measurement. Utility Model Content

[0003] The purpose of this invention is to provide a guided waveguide tube for a guided wave radar level gauge that can measure low-temperature, easily solidified materials. This can prevent materials from solidifying on the guided waveguide rod, which would cause inaccurate level readings, and improve the accuracy and stability of the level gauge measurement, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a guided wave radar level gauge waveguide tube for measuring low-temperature easily solidified materials, comprising a radar level gauge and a waveguide rod fixed at the lower end of the radar level gauge, wherein a heating mechanism for heating the waveguide rod is sleeved on the outside of the waveguide rod, and the heating mechanism is connected to the upper end of the waveguide rod through a flange assembly;

[0005] The heating mechanism includes an inner tube, an outer tube, and a steel plate. The inner tube is located inside the outer tube. The flange assembly, the steel plate, the inner tube, and the outer tube form a steam cavity. The flange assembly has a steam inlet and a steam outlet that communicate with the steam cavity.

[0006] Preferably, the flange assembly includes a first flange and a second flange, the upper end of the waveguide rod is inserted into the first flange, the first flange and the second flange are connected by bolts, and the second flange is fixed to the heating mechanism.

[0007] Preferably, the upper ends of both the inner and outer pipes are fixed to the second flange, the lower ends of both the inner and outer pipes are fixed to the steel plate, and the steam cavity is located between the inner and outer pipes.

[0008] Preferably, the steel plate is arranged in a ring shape, the waveguide is located inside the inner tube, and the outer tube and the inner tube are concentric tubes.

[0009] Preferably, the steam inlet and steam outlet are both located on the side wall of the second flange, and the steam inlet and steam outlet are arranged symmetrically.

[0010] Preferably, both the steam inlet and the steam outlet are provided with internal thread sections, and the diameters of the steam inlet and the steam outlet are set to 8 mm.

[0011] Preferably, the upper outer wall of the waveguide is fitted with a protective sleeve made of rubber, and the first flange has a through hole for the protective sleeve to be inserted.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model adds a heating mechanism to the outside of the waveguide rod. During use, the steam supplied by the steam supply device is introduced into the steam cavity through the steam inlet. The steam is used to heat the space around the waveguide rod and the material, preventing the material from solidifying on the waveguide rod. This avoids inaccurate liquid level detection caused by the material solidifying on the waveguide rod, thereby improving the accuracy and stability of the radar liquid level gauge measurement. Attached Figure Description

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

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

[0016] Figure 3 This is a schematic diagram of the exploded structure of this utility model.

[0017] In the diagram: 1. Heating mechanism; 11. Outer pipe; 12. Inner pipe; 13. Steel plate; 2. Radar level gauge; 21. Waveguide rod; 3. First flange; 4. Second flange; 5. Flange connection hole; 6. Flange mounting hole; 7. Steam outlet; 8. Steam inlet; 9. Steam cavity; 10. Protective sleeve. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-3 This utility model provides a technical solution: a guided wave radar level gauge waveguide tube for measuring low-temperature, easily solidified materials, including a radar level gauge 2 and a waveguide rod 21 fixed to the lower end of the radar level gauge 2. A heating mechanism 1 for heating the waveguide rod 21 is sleeved on the outside of the waveguide rod 21. The heating mechanism 1 is connected to the upper end of the waveguide rod 21 through a flange assembly. By adding a heating mechanism 1 to the outside of the waveguide rod 21, during use, steam supplied by a steam supply device is introduced into the steam chamber 9 from the steam inlet 8. The steam is used to heat the space around the waveguide rod 21 and the materials, preventing the materials from solidifying on the waveguide rod 21 and avoiding inaccurate level detection caused by the solidification of materials on the waveguide rod 21, thereby improving the accuracy and stability of the radar level gauge 2 measurement.

[0020] The heating mechanism 1 includes an inner tube 12, an outer tube 11, and a steel plate 13. The inner tube 12 is located inside the outer tube 11. The flange assembly, the steel plate 13, the inner tube 12, and the outer tube 11 form a steam cavity 9. The flange assembly is provided with a steam inlet 8 and a steam outlet 7 that communicate with the steam cavity 9. The steam inlet 8 and the steam outlet 7 facilitate the introduction of an external steam source into the steam cavity 9 and then the steam flows out through the steam outlet 7, so that the steam inside the steam cavity 9 is in a state of circulation, so that the temperature of the heating mechanism 1 remains stable, thereby ensuring the stability of the surrounding environment of the waveguide rod 21 and preventing the low-temperature medium around the waveguide rod 21 from solidifying.

[0021] The flange assembly includes a first flange 3 and a second flange 4. The upper end of the waveguide rod 21 is inserted into the first flange 3. The first flange 3 and the second flange 4 are connected by bolts. The second flange 4 is fixed to the heating mechanism 1. Both the first flange 3 and the second flange 4 are provided with flange connection holes 5 for bolt connection. The first flange 3 is also provided with flange mounting holes 6, which facilitates connection with the equipment.

[0022] The upper ends of the inner pipe 12 and the outer pipe 11 are both fixed to the second flange 4, and the lower ends of the inner pipe 12 and the outer pipe 11 are both fixed to the steel plate 13. The steam cavity 9 is located between the inner pipe 12 and the outer pipe 11, so that the inner pipe 12, the outer pipe 11, the steel plate 13 and the second flange 4 can form a closed steam cavity 9 for transmitting steam.

[0023] The steel plate 13 is arranged in a ring shape, and the waveguide 21 is located inside the inner tube 12. The outer tube 11 and the inner tube 12 are concentric tubes, so that the waveguide 21 can be surrounded by the inner tube 12. The waveguide 21 is located at the center of the inner tube 12 so that the measuring material can enter the interior of the inner tube 12 during measurement.

[0024] The steam inlet 8 and the steam outlet 7 are both located on the side wall of the second flange 4, and the steam inlet and the steam outlet 7 are arranged symmetrically. By setting the steam inlet 8 and the steam outlet 7 on the side wall of the second flange 4, it is convenient to connect to the steam output pipeline of the steam supply equipment to transmit steam in the steam cavity 9.

[0025] Both the steam inlet 8 and the steam outlet 7 are provided with internal thread sections at their openings. The diameters of the steam inlet and the steam outlet 7 are set to 8mm. The internal thread sections facilitate the connection of the steam supply pipeline to the equipment with the steam chamber 9 using a spiral method.

[0026] The upper outer wall of the waveguide 21 is fitted with a rubber protective sleeve 10. The first flange 3 has a through hole for the protective sleeve 10 to be inserted. The protective sleeve 10 protects the waveguide 21 and prevents the stress of the first flange 3 from affecting the waveguide 21.

[0027] During the manufacturing of the guided wave radar level gauge 2, a small-diameter 2-inch tube is inserted into the interior of a 3-inch outer tube 11, with the larger tube inside the smaller tube to ensure concentricity. After aligning one end of the two tubes, the inner tube 12 and the outer tube 11 are welded together with a steel plate 13. After aligning the other ends of the inner tube 12 and the outer tube 11, a 2-inch * 3-inch second flange 4 is welded. Two 8mm diameter holes are drilled in the center of the side of the second flange 4, one as a steam inlet 8 and the other as a steam outlet 7. A steam cavity 9 is formed between the outer tube 11 and the inner tube 12. The two holes are connected to the steam cavity 9, and high-temperature steam exceeding the freezing point of the medium is introduced to heat the area around the guided wave rod 21 and the material, preventing the material from solidifying on the guided wave rod 21.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waveguide tube for a guided wave radar level gauge capable of measuring low-temperature, easily solidified materials, characterized in that: It includes a radar level gauge (2) and a waveguide rod (21) fixed at the lower end of the radar level gauge (2). A heating mechanism (1) for heating the waveguide rod (21) is sleeved on the outside of the waveguide rod (21). The heating mechanism (1) is connected to the upper end of the waveguide rod (21) through a flange assembly. The heating mechanism (1) includes an inner tube (12), an outer tube (11) and a steel plate (13). The inner tube (12) is located inside the outer tube (11). The flange assembly, the steel plate (13), the inner tube (12) and the outer tube (11) form a steam cavity (9). The flange assembly is provided with a steam inlet (8) and a steam outlet (7) that communicate with the steam cavity (9).

2. The waveguide tube of the guided wave radar level gauge for measuring low-temperature, easily solidified materials according to claim 1, characterized in that: The flange assembly includes a first flange (3) and a second flange (4). The upper end of the waveguide rod (21) is inserted into the first flange (3). The first flange (3) and the second flange (4) are connected by bolts. The second flange (4) is fixed to the heating mechanism (1).

3. The waveguide tube of the guided wave radar level gauge for measuring low-temperature, easily solidified materials according to claim 2, characterized in that: The upper ends of the inner tube (12) and the outer tube (11) are both fixed to the second flange (4), and the lower ends of the inner tube (12) and the outer tube (11) are both fixed to the steel plate (13). The steam cavity (9) is located between the inner tube (12) and the outer tube (11).

4. The waveguide tube of the guided wave radar level gauge for measuring low-temperature, easily solidified materials according to claim 3, characterized in that: The steel plate (13) is arranged in a ring shape, the waveguide rod (21) is located inside the inner tube (12), and the outer tube (11) and the inner tube (12) are concentric tubes.

5. The waveguide tube of a guided wave radar level gauge for measuring low-temperature, easily solidified materials according to claim 2, characterized in that: The steam inlet (8) and steam outlet (7) are both located on the side wall of the second flange (4), and the steam inlet and steam outlet (7) are arranged symmetrically.

6. The waveguide tube of a guided wave radar level gauge for measuring low-temperature, easily solidified materials according to claim 5, characterized in that: Both the steam inlet (8) and the steam outlet (7) are provided with internal thread sections at their openings, and the diameters of the steam inlet and the steam outlet (7) are set to 8 mm.

7. The waveguide tube of a guided wave radar level gauge for measuring low-temperature, easily solidified materials according to claim 2, characterized in that: The upper outer wall of the waveguide rod (21) is fitted with a rubber protective sleeve (10), and the first flange (3) has a through hole for the protective sleeve (10) to be inserted.

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