Ultra-High Temperature Microwave Level Switch

Abstract

The present invention discloses an ultra-high temperature type microwave level switch, which includes a probe body and a connector. The connector is arranged at one end of the probe body for connecting an external meter head; a signal amplification component, which is arranged at the other end of the probe body for enhancing the transmitted signal; a protection component, which is arranged on the signal amplification component for protecting the signal amplification component; and a heat insulation component, which is arranged in the connector for isolating heat and preventing hot air from entering the external meter head through the connector.

Description

Technical Field

[0001] The present invention relates to the technical field of level switches, and particularly to an ultra-high temperature type microwave level switch. Background Art

[0002] The series of microwave level switch products are solid level switches designed based on the transmission and reception of 24G Hertz continuous waves. The microwave level switch is a complete set of instruments. One end is the transmitting end, responsible for sending microwave signals; the other end is the receiving end, responsible for collecting and outputting microwave signals. The instruments are installed in pairs at the positions to be monitored. When there is no material blockage at the monitoring position, the receiving end outputs a "no material" signal; when there is a material blockage at the monitoring position, the receiving end outputs a "material blockage" signal. The state of the output signal can be set on-site for high-level alarm and low-level alarm.

[0003] Existing level switches can be used normally in general situations, and the operating temperature is usually around 260°C. However, in some special scenarios such as coke dry quenching furnaces, conventional probes cannot be used. There are a large amount of steam and dust inside the coke dry quenching furnace tank. Commonly used equipment of the same type on the market cannot be used for a long time in this scenario. Since the high-temperature steam inside the tank can penetrate into the electronic unit through the probe, the repair rate of the probe is extremely high. Summary of the Invention

[0004] The purpose of the present invention is to provide an ultra-high temperature type microwave level switch.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions:

[0006] An ultra-high temperature type microwave level switch, including a probe body, and

[0007] a connector, which is arranged at one end of the probe body and is used for connecting an external meter head;

[0008] a signal amplification component, which is arranged at the other end of the probe body and is used for enhancing the transmitted signal;

[0009] a protection component, which is arranged on the signal amplification component and is used for protecting the signal amplification component;

[0010] a heat insulation component, which is arranged inside the connector and is used for insulating heat and preventing hot air from entering the external meter head through the connector.

[0011] Preferably, it further includes a connection component, which is arranged on the probe body and is used for strengthening the signal amplification component.

[0012] Preferably, the probe body includes a waveguide, one end of the waveguide is disposed within the connection end of the connector, and the signal amplification component is disposed at the other end of the waveguide.

[0013] Preferably, the signal amplification component includes a signal concentration tube, a signal amplification board, and a signal transmission tube. A signal reflection plate is disposed at the end of the signal transmission tube, with a gap left between it and the signal transmission tube;

[0014] The signal concentration tube is connected to the other end of the waveguide. The signal amplification board is disposed at the other end of the signal concentration tube. The signal transmission tube is disposed on the signal amplification board, and the protection component is disposed on the signal amplification board;

[0015] The interiors of the waveguide, the signal concentration tube, the signal amplification board, and the signal transmission tube are all hollow and interconnected for signal propagation.

[0016] Preferably, the protection component includes a protective cover and a protection plate. The protection plate is disposed at the open end of the protective cover for sealing;

[0017] The other end of the protective cover is disposed on the signal amplification board and is integrally formed to completely cover the signal amplification board.

[0018] Preferably, the connection component includes a locking nut. The locking nut is threadedly connected to the waveguide and abuts against the signal concentration tube.

[0019] Preferably, the heat insulation component includes a gasket. The gasket is disposed within the connection end of the connector, and the end of the waveguide within the connector abuts against the gasket.

[0020] Preferably, heat dissipation fins are provided on the waveguide.

[0021] In summary, the beneficial technical effects of the present invention are as follows:

[0022] Through the improvement of the structure, the level switch can be applied in a high-temperature tank with a maximum temperature of up to 1200 °C. First, the heat insulation component can ensure that the level switch has good sealing performance, preventing high-temperature steam in the tank from penetrating into the interior and damaging it; further, the protection component protects the signal amplification component extending into the tank interior to prevent wear caused by the material; also, a signal amplification component is added to its main structure to enhance the transmitted signal, making the signal transmission effect better. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an isometric schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the median section of the present invention;

[0025] Figure 3 is a schematic diagram showing the internal structure of the present invention.

[0026] Reference numerals: 1, connector; 2, gasket; 3, waveguide; 4, locknut; 5, signal amplification component; 51, signal concentration tube; 52, signal amplification board; 53, signal transmission tube; 54, reflector; 6, protection component; 61, protective cover; 62, protection board; 7, heat sink. Detailed implementation manners

[0027] The present invention will be clearly and completely described below in conjunction with the embodiments.

[0028] As Figures 1 - 3 shown, the present invention discloses an ultra-high temperature type microwave level switch, which includes a probe body, and a connector 1. The connector 1 is arranged at one end of the probe body and is used for connecting an external meter head; a signal amplification component 5, the signal amplification component 5 is arranged at the other end of the probe body and is used for enhancing the transmitted signal; a protection component 6, the protection component 6 is arranged on the signal amplification component 5 and is used for protecting the signal amplification component 5; a heat insulation component, the heat insulation component is arranged in the connector 1 and is used for insulating heat and preventing hot air from entering the external meter head through the connector 1.

[0029] On the basis of the above embodiments, some other embodiments of the present application may further add or limit one or more of the following combinations on the basis of the above specific embodiments.

[0030] As Figures 1 - 3 shown,

[0031] The probe body includes a waveguide 3. One end of the waveguide 3 is arranged in the connection end of the connector 1, and the signal amplification component 5 is arranged at the other end of the waveguide 3.

[0032] The signal can be transmitted from the signal amplification component 5 to the meter head connected to the connector 1 through the waveguide 3, so as to complete the signal transmission work.

[0033] The signal amplification component 5 includes a signal concentration tube 51, a signal amplification board 52 and a signal transmission tube 53. A signal reflector 54 is arranged at the end of the signal transmission tube 53, and there is a gap between it and the signal transmission tube 53;

[0034] The signal concentration tube 51 is connected to the other end of the waveguide 3. The signal amplification board 52 is arranged at the other end of the signal concentration tube 51. The signal concentration tube 51, the signal amplification board 52 and the signal transmission tube 53 are integrally formed. The signal transmission tube 53 is arranged on the signal amplification board 52, and the protection component 6 is arranged on the signal amplification board 52;

[0035] The interiors of the waveguide 3, the signal concentration tube 51, the signal amplification board 52, and the signal transmission tube 53 are all hollow and interconnected for signal propagation.

[0036] The signal transmitted through the waveguide 3 is first transmitted into the signal concentration tube 51, and then the signal is transmitted into the signal transmission tube 53 through the signal concentration tube 51. The signal will be transmitted from the signal transmission tube 53 to the signal reflection board 54, and the signal reflection board 54 reflects the signal onto the signal amplification board 52. Since the signal amplification board 52 is frustum-shaped or horn-shaped, the signal will change its angle according to the shape of the signal amplification board 52 at this point, thus completing the amplification of the signal.

[0037] And it is known that the signal is transmitted in the cavity. Therefore, to ensure the transmission rate, the diameter of the cavity in the waveguide 3 should be larger than the diameter of the cavity in the signal transmission tube 53, and the diameter of the cavity in the signal concentration tube 51 is conical, that is, the diameter at the connection with the waveguide 3 is the same as the diameter in the waveguide 3, and the diameter connected to the signal transmission tube 53 is the same as the diameter of the cavity in the signal transmission tube 53, so that the signal is concentrated when transmitted to the signal amplification component 5, thereby increasing the signal transmission rate.

[0038] The protection component 6 includes a protective cover 61 and a protection plate 62. The protection plate 62 is arranged at the open end of the protective cover 61 for sealing; the other end of the protective cover 61 is arranged on the signal amplification board 52 and is integrally formed to cover the entire signal amplification board 52.

[0039] The signal amplification component 5 can be covered by the protective cover 61, thus playing a protective role. The protective cover 61 is made of titanium alloy and can withstand higher temperatures; the protection plate 62 is fixed by high-temperature resistant glue after the signal amplification component 5 is installed. Since the protection plate 62 needs to directly contact the material in the tank, wear-resistant materials such as alumina ceramic, silicon nitride ceramic, silicon carbide ceramic, and hexagonal boron nitride ceramic can be used, and the above materials can also penetrate the signal, ensuring high temperature resistance and wear resistance without affecting the signal transmission.

[0040] It also includes a connection component. The connection component is arranged on the probe body and is used to reinforce the signal amplification component 5. The connection component includes a lock nut 4. The lock nut 4 is threadedly connected to the waveguide 3 and abuts against the signal concentration tube 51.

[0041] Since the signal amplification component 5 and the waveguide 3 are not integrally formed and are threadedly connected to the waveguide 3 through the signal concentration tube 51, tightening the lock nut 4 can further ensure the stability of the connection and prevent the signal transmission from being affected due to loosening in the later stage.

[0042] The heat insulation component includes a gasket 2, which is arranged inside the connection end of the joint 1, and one end of the waveguide 3 located inside the joint 1 abuts against the gasket 2. The waveguide 3 is provided with heat dissipation fins 7.

[0043] Since there is a cavity inside the waveguide 3 and one end of the waveguide 3 is directly inserted into the joint 1, the high-temperature steam in the tank will penetrate upward through the cavity. The gasket 2 can be used to separate the waveguide 3 from the joint 1 for sealing to prevent the penetration of high-temperature steam. The gasket 2 is made of materials such as polytetrafluoroethylene (PTFE), polyoxymethylene (POM), polyamide (PA) (nylon), and polyetheretherketone (PEEK). The above materials have good high-temperature resistance, and since it is completely sealed, the signal needs to penetrate the gasket 2, and using the above materials can enable the signal to penetrate, thus not affecting the signal transmission. By setting the heat dissipation fins 7, the heat dissipation area of the waveguide 3 itself can be increased, thereby increasing heat dissipation.

[0044] In summary, through the improvement of the structure, the level switch can be applied to a high-temperature tank with a maximum temperature of up to 1200 °C. First, the heat insulation component can ensure that the level switch has good sealing performance to prevent the high-temperature steam in the tank from penetrating into the interior and damaging it. Further, the protective component 6 protects the signal amplification component 5 extending into the tank interior to prevent wear caused by the material. The signal amplification component 5 is also made on its main structure to enhance the transmitted signal, making the signal transmission effect better.

[0045] The above is only the preferred specific implementation manner of the present invention, and does not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. Ultra-high temperature type microwave level switch, characterized in that, It includes a probe body, and a connector, which is arranged at one end of the probe body and is used for connecting an external meter head; a signal amplification component, which is arranged at the other end of the probe body and is used for enhancing the transmitted signal; a protection component, which is arranged on the signal amplification component and is used for protecting the signal amplification component; a heat insulation component, which is arranged in the connector and is used for insulating heat and preventing hot air from entering the external meter head through the connector; the probe body includes a waveguide, one end of the waveguide is arranged in the connection end of the connector, and the signal amplification component is arranged at the other end of the waveguide; the signal amplification component includes a signal concentration tube, a signal amplification board and a signal transmission tube, and a signal reflection plate is arranged at the end of the signal transmission tube, with a gap left between it and the signal transmission tube; the signal concentration tube is connected to the other end of the waveguide, the signal amplification board is arranged at the other end of the signal concentration tube, the signal transmission tube is arranged on the signal amplification board, and the protection component is arranged on the signal amplification board; the interiors of the waveguide, the signal concentration tube, the signal amplification board and the signal transmission tube are all hollow and communicate with each other for signal propagation.

2. The ultra-high temperature type microwave level switch according to claim 1, characterized in that, It further includes a connection component, which is arranged on the probe body and is used for strengthening the signal amplification component.

3. The ultra-high temperature type microwave level switch according to claim 2, wherein the protection component includes a protective cover and a protection plate, and the protection plate is arranged at the open end of the protective cover for sealing; the other end of the protective cover is arranged on the signal amplification board and is integrally formed for covering the entire signal amplification board.

4. The ultra-high temperature type microwave level switch according to claim 3, characterized in that, the connection component includes a lock nut, which is threadedly connected to the waveguide and abuts against the signal concentration tube.

5. The ultra-high temperature type microwave level switch according to claim 4, wherein the heat insulation component includes a gasket, which is arranged in the connection end of the connector, and one end of the waveguide located in the connector abuts against the gasket.

6. The ultra-high temperature type microwave level switch according to claim 3, characterized in that Heat dissipation fins are arranged on the waveguide.

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