Dual-phase steel guided wave radar liquid level meter

Abstract

The utility model provides a dual-phase steel wave guide radar liquid level meter, which comprises a transmitter, a connecting rod, radiating fins, a wave guide rod, a liquid storage tank body and a connecting assembly, the upper end of the connecting rod is fixed at a pulse transmitting end of the transmitter, the radiating fins are uniformly fixed on the connecting rod along the longitudinal direction, the upper end of the wave guide rod is fixed at the lower end of the connecting rod, and the lower end of the wave guide rod is fixed at the lower end of the liquid storage tank body. The wave guide rod is made of a duplex stainless steel material, the connecting rod is fixed at an opening in the upper part of the liquid storage tank body through the connecting assembly, and the wave guide rod corresponds to the interior of the liquid storage tank body. Compared with the prior art, the liquid level meter has the advantages that the wave guide rod is additionally arranged below the connecting rod and is made of the duplex stainless steel material, so that the corrosion resistance of the liquid level meter is enhanced, the liquid level meter is suitable for measuring the liquid level of a corrosive medium for a long time and cannot be corroded and oxidized, the service life of the liquid level meter is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of liquid level detection equipment, and in particular to a dual-phase steel guided wave radar liquid level gauge. Background Technology

[0002] In the field of liquid level measurement, the working principle of traditional guided wave radar level gauges is that the emitted microwave pulse propagates along the waveguide rod. When it encounters the measured medium, a sudden change in the dielectric constant causes reflection, and part of the pulse energy is reflected back to the device. The time interval between the emitted and reflected pulses is proportional to the distance to the measured medium. Liquid level measurement is achieved through this principle. However, traditional guided wave radar level gauges have significant drawbacks. Traditional waveguide rods are mostly made of ordinary stainless steel, which is prone to oxide film peeling off when in contact with corrosive media for a long time, leading to corrosion of the waveguide rod, shortened lifespan, and high maintenance costs. Therefore, there is an urgent need for a guided wave radar level gauge that is highly corrosion-resistant, structurally stable, and easy to maintain. Utility Model Content

[0003] The purpose of this invention is to provide a dual-phase steel guided wave radar level gauge to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A dual-phase steel guided wave radar level gauge includes a transmitter, a connecting rod, a heat sink, a waveguide, a storage tank, and a connecting assembly. The upper end of the connecting rod is fixed to the pulse transmitting end of the transmitter. Multiple heat sinks are arranged and uniformly fixed on the connecting rod along the longitudinal direction. The upper end of the waveguide is fixed to the lower end of the connecting rod. The waveguide is made of dual-phase stainless steel. The connecting rod is fixed to the opening above the storage tank through the connecting assembly. The waveguide corresponds to the inside of the storage tank.

[0006] Further description of this utility model: The heat sink is annular and sleeved on the outside of the connecting rod.

[0007] Further description of this utility model: The lower end of the connecting rod is provided with a threaded hole, and the upper end of the waveguide rod is provided with a threaded post that is threadedly connected to the threaded hole.

[0008] Further description of this utility model: The outer diameter of the waveguide rod is the same as the outer diameter of the connecting rod.

[0009] Further description of this utility model: The connecting assembly includes a level gauge flange, a tank flange, a sealing gasket, a bolt, a nut, and a flat washer. The level gauge flange is fixed to the outer periphery of the connecting rod and corresponds to the space between the transmitter and the waveguide rod. The tank flange is fixed to the upper end of the tank. The upper and lower ends of the sealing gasket abut against the level gauge flange and the tank flange, respectively. The upper end of the bolt passes through the level gauge flange, and the lower end of the bolt passes through the tank flange. Two sets of nuts are provided and are threadedly connected to the upper and lower ends of the bolt, respectively. The flat washer is sleeved on the bolt. Two sets of flat washers are provided. The upper flat washer corresponds to the space between the level gauge flange and the nut, and the lower flat washer corresponds to the space between the tank flange and the nut.

[0010] Further description of the present invention: A flange neck is provided at the middle of the upper end of the liquid storage tank, and the tank flange is fixed to the opening at the upper end of the flange neck.

[0011] Further description of this utility model: The height of the flange neck is 5 cm or more.

[0012] Further description of this utility model: The outer periphery of the connecting rod is fixed to the middle part of the level gauge flange by welding, and the tank flange is fixed to the upper end of the flange neck by welding.

[0013] The beneficial effects of this invention are as follows: In operation, the liquid storage tank contains a corrosive medium. The transmitter requires a DC 24V power supply and also outputs a 4-20mA analog signal. The high-frequency microwave pulse emitted by the transmitter propagates along a duplex stainless steel waveguide after passing through the connecting rod. When the high-frequency microwave pulse comes into contact with the corrosive medium, a reflected wave is generated. The reflected wave is fed back to the transmitter via the waveguide, and the transmitter calculates the liquid level of the corrosive medium in the storage tank. The advantage of this design is that by adding a waveguide made of duplex stainless steel below the connecting rod, its corrosion resistance is enhanced, making it suitable for long-term liquid level measurement of corrosive media without corrosion or oxidation. This not only extends the lifespan of the level gauge but also reduces maintenance costs. Attached Figure Description

[0014] Figure 1 This is an overall structural diagram of the present invention (with a partial cross-sectional view of the liquid storage tank);

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

[0016] Figure 3 yes Figure 2 A magnified view of a portion of position A in the middle;

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Transmitter; 2. Connecting rod; 21. Threaded hole; 3. Heat sink; 4. Waveguide; 41. Threaded post; 5. Storage tank; 51. Flange neck; 6. Connecting assembly; 61. Level gauge flange; 62. Tank flange; 63. Sealing gasket; 64. Bolt; 65. Nut; 66. Flat gasket. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] like Figures 1 to 3 As shown, a dual-phase steel guided wave radar level gauge includes a transmitter 1, a connecting rod 2, a heat sink 3, a waveguide rod 4, a storage tank 5, and a connecting assembly 6. The upper end of the connecting rod 2 is fixed to the pulse transmitting end of the transmitter 1. Multiple sets of heat sink 3 are uniformly fixed on the connecting rod 2 along the longitudinal direction. The upper end of the waveguide rod 4 is fixed to the lower end of the connecting rod 2. The waveguide rod 4 is made of dual-phase stainless steel. The connecting rod 2 is fixed to the opening above the storage tank 5 through the connecting assembly 6. The waveguide rod 4 corresponds to the inside of the storage tank 5.

[0021] In operation, the storage tank 5 contains a corrosive medium. Transmitter 1 requires a DC 24V power supply and also outputs a 4-20mA analog signal. The high-frequency microwave pulse emitted by transmitter 1 propagates along the duplex stainless steel waveguide 4 after passing through the connecting rod 2. When the high-frequency microwave pulse comes into contact with the corrosive medium, a reflected wave is generated. The reflected wave is fed back to transmitter 1 via the waveguide 4. Transmitter 1 then calculates the level of the corrosive medium in the storage tank 5. The advantage of this design is that by adding the waveguide 4 below the connecting rod 2, made of duplex stainless steel, its corrosion resistance is enhanced, making it suitable for long-term level measurement of corrosive media without corrosion or oxidation. This not only extends the lifespan of the level gauge but also reduces maintenance costs.

[0022] The heat sink 3 is annular and sleeved on the connecting rod 2. This increases the heat dissipation surface area of ​​the heat sink 3, improves the heat dissipation performance of the transmitter 1, and further extends the service life of the level gauge.

[0023] The lower end of the connecting rod 2 is provided with a threaded hole 21, and the upper end of the waveguide rod 4 is provided with a threaded post 41 that is threadedly connected to the threaded hole 21. The threaded connection facilitates the installation and replacement of the waveguide rod 4.

[0024] The outer diameter of the waveguide rod 4 is the same as that of the connecting rod 2. This reduces the speed variation of the pulse signal during the transmission of the high-frequency microwave pulse from the connecting rod 2 to the waveguide rod 4.

[0025] The connecting assembly 6 includes a level gauge flange 61, a tank flange 62, a sealing gasket 63, a bolt 64, a nut 65, and a flat washer 66. The level gauge flange 61 is fixed to the outer periphery of the connecting rod 2 and corresponds to the space between the transmitter 1 and the waveguide rod 4. The tank flange 62 is fixed to the upper end of the tank. The upper and lower ends of the sealing gasket 63 abut against the level gauge flange 61 and the tank flange 62, respectively. The upper end of the bolt 64 passes through the level gauge flange 61, and the lower end of the bolt 64 passes through the tank flange 62. Two sets of nuts 65 are provided and are threaded to the upper and lower ends of the bolt 64, respectively. The flat washer 66 is fitted onto the bolt 64. Two sets of flat washer 66 are provided. The upper flat washer 66 corresponds to the space between the level gauge flange 61 and the nut 65, and the lower flat washer 66 corresponds to the space between the tank flange 62 and the nut 65.

[0026] The sealing gasket 63 is installed between the level gauge flange 61 and the tank flange 62; the bolt 64 and nut 65 are connected to the flat gasket 66, which simultaneously connects the level gauge flange 61 and the tank flange 62; the sealing gasket 63 is pressed between the level gauge flange 61 and the tank flange 62 to achieve a sealing effect.

[0027] The upper middle part of the liquid storage tank 5 is provided with a flange neck 51, and the tank flange 62 is fixed to the opening at the upper end of the flange neck 51. The flange neck 51 can prevent the tank flange 62 from being too close to the liquid storage tank 5, and facilitates the installation and removal of the bolts 64.

[0028] The height of the flange neck 51 is more than 5 centimeters to ensure that there is sufficient distance between the tank flange 62 and the liquid storage tank 5 so as to install and remove the bolts 64.

[0029] The outer periphery of the connecting rod 2 is fixed to the middle of the level gauge flange 61 by welding, and the tank flange 62 is fixed to the upper end of the flange neck 51 by welding. Welding can prevent corrosive media in the storage tank 5 from leaking outward, thereby improving the sealing and safety of the level gauge.

[0030] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A dual phase steel guided wave radar liquid level gauge characterized by: The utility model relates to a kind of liquid level transmitter, including transmitter, connecting rod, fin, waveguide, liquid storage tank body and connecting assembly, the upper end of the connecting rod is fixed to the pulse transmitting end of the transmitter, the fin is arranged multiple groups and is fixed on the connecting rod along longitudinal direction uniformly, the upper end of the waveguide is fixed in the lower end of the connecting rod, the waveguide uses duplex stainless steel material, the connecting rod is fixed at the opening above the liquid storage tank body by the connecting assembly, the waveguide corresponds to the inside of the liquid storage tank body.

2. A dual-phase steel waveguide radar liquid level gauge according to claim 1, characterized in that: The fin is circular ring and is sleeved on the connecting rod.

3. The dual-phase steel waveguide radar liquid level gauge according to claim 1, characterized in that: The lower end of the connecting rod is equipped with threaded hole, and the upper end of the waveguide is equipped with threaded column screwing with threaded hole.

4. The dual-phase steel waveguide radar liquid level gauge according to claim 1, characterized in that: The outer diameter of the waveguide is same with the outer diameter of the connecting rod.

5. The dual-phase steel waveguide radar liquid level gauge according to claim 1, characterized in that: The connecting assembly includes liquid level meter flange, tank flange, sealing gasket, bolt, nut and flat washer, the liquid level meter flange is fixed to the outer periphery of the connecting rod and corresponds to between the transmitter and the waveguide, the tank flange is fixed to the upper end of the tank, the upper and lower ends of the sealing gasket respectively abut against the liquid level meter flange and the tank flange, the upper end of the bolt is threaded through the liquid level meter flange, the lower end of the bolt is threaded through the tank flange, the nut is arranged two groups and is respectively screwing with the upper end and the lower end of the bolt, the flat washer is sleeved on the bolt, the flat washer is arranged two groups, the upper flat washer corresponds to between the liquid level meter flange and the nut, and the lower flat washer corresponds to between the tank flange and the nut.

6. A dual-phase steel waveguide radar liquid level gauge according to claim 5, characterized in that: The upper end of the liquid storage tank body is equipped with flange neck in the middle, and the tank flange is fixed to the opening of the upper end of the flange neck.

7. A dual-phase steel waveguide radar liquid level gauge according to claim 6, characterized in that: The height of the flange neck is more than 5 centimeters.

8. The dual-phase steel waveguide radar liquid level gauge according to claim 6, characterized in that: The outer periphery of the connecting rod is fixed in the middle of the liquid level meter flange by welding, and the tank flange is fixed to the upper end of the flange neck by welding.

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