Ultrahigh-temperature microwave level switch

Abstract

The invention discloses an ultra-high-temperature microwave level switch which comprises a probe body and a connector, and the connector is arranged at one end of the probe body and used for being connected with an external gauge outfit. The signal amplification part is arranged at the other end of the probe main body and is used for enhancing a transmission signal; the protection part is arranged on the signal amplification part and is used for protecting the signal amplification part; and the heat insulation part is arranged in the joint and is used for insulating heat and preventing hot air from entering an external meter head through the joint.

Description

Technical Field

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

[0002] The microwave level switch series products are solid level switches based on 24 GHz continuous wave transmission and reception design. The microwave level switch is a complete set of instruments, one end is the transmitter, responsible for the transmission of microwave signals; the other end is the receiver, responsible for the collection and output of microwave signals. The instruments are installed in pairs at the position to be monitored. When there is no blockage at the monitoring position, the receiver outputs a "no material" signal; when there is a blockage at the monitoring position, the receiver outputs a "blockage" signal. The state of the output signal can be set to high alarm and low alarm on site.

[0003] Existing level switches can be used normally in general situations, and the operating temperature is usually around 260°C. However, conventional probes are not suitable for some special scenarios, such as dry quenching coke ovens. There is a large amount of steam and smoke inside the dry quenching coke oven tank. The same type of equipment commonly used 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 probe has a very high return rate. Summary of the invention

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

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: The ultra-high temperature microwave level switch comprises a probe body and A connector, which is disposed on one end of the probe body and is used to connect to an external meter head; A signal amplifying component, which is disposed at the other end of the probe body and is used to enhance the transmission signal; a protective component, the protective component being arranged on the signal amplifying component and being used for protecting the signal amplifying component; A heat insulating component is arranged in the joint to isolate heat and prevent hot air from entering the external meter head through the joint.

[0006] Preferably, a connecting component is further included, and the connecting component is arranged on the probe body and is used to reinforce the signal amplifying component.

[0007] Preferably, the probe body comprises a waveguide, one end of which is arranged in the connecting end of the connector, and the signal amplifying component is arranged at the other end of the waveguide.

[0008] Preferably, the signal amplifying component comprises a signal concentrating tube, a signal amplifying plate and a signal transmission tube, and a signal reflecting plate is provided at the end of the signal transmission tube, with a gap between the signal reflecting plate and the signal transmission tube; The signal concentrating tube is connected to the other end of the waveguide tube, the signal amplifying board is arranged at the other end of the signal concentrating tube, the signal transmission tube is arranged on the signal amplifying board, and the protective component is arranged on the signal amplifying board; The waveguide tube, the signal concentrating tube, the signal amplifying plate and the signal transmission tube are all hollow inside and are interconnected for signal transmission.

[0009] Preferably, the protective component comprises a protective cover and a protective plate, and the protective plate is arranged at an open end of the protective cover for sealing; The other end of the protective cover is arranged on the signal amplifying board and is integrally formed to completely cover the signal amplifying board.

[0010] Preferably, the connecting component comprises a locking nut, which is threadedly connected to the waveguide and abuts against the signal concentrating tube.

[0011] Preferably, the heat insulating component comprises a gasket, and the gasket is arranged in the connecting end of the joint, and one end of the waveguide located in the joint abuts against the gasket.

[0012] Preferably, a heat sink is provided on the waveguide.

[0013] In summary, the beneficial technical effects of the present invention are: Through structural improvement, the level switch can be used in high-temperature tanks with a maximum temperature of up to 1200°C. First, the heat-insulating components can ensure that the level switch has good sealing properties to prevent high-temperature steam in the tank from penetrating into the interior and causing damage to it; further, the protective components are used to protect the signal amplification components extending into the tank to prevent them from being worn by materials; and signal amplification components are also made on the main structure to enhance the transmitted signal, thereby achieving better signal transmission effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an axonometric schematic diagram of the overall structure of the present invention; Figure 2 is a midline cross-sectional schematic diagram of the present invention; Figure 3 It is a schematic diagram showing the internal structure of the present invention.

[0015] Figure numerals: 1. connector; 2. gasket; 3. waveguide tube; 4. locking nut; 5. signal amplifying component; 51. signal concentrating tube; 52. signal amplifying board; 53. signal transmission tube; 54. reflecting plate; 6. protective component; 61. protective cover; 62. protective plate; 7. heat sink. DETAILED DESCRIPTION

[0016] The present invention will be described clearly and completely below with reference to the embodiments.

[0017] like Figure 1-3 As shown, the present invention discloses an ultra-high temperature microwave level switch, including a probe body, and a connector 1, wherein the connector 1 is arranged at one end of the probe body and is used to connect an external meter head; a signal amplifying component 5, wherein the signal amplifying component 5 is arranged at the other end of the probe body and is used to enhance the transmission signal; a protective component 6, wherein the protective component 6 is arranged on the signal amplifying component 5 and is used to protect the signal amplifying component 5; and a heat insulating component, wherein the heat insulating component is arranged in the connector 1 and is used to isolate heat and prevent hot air from entering the external meter head through the connector 1.

[0018] On the basis of the above embodiments, some other embodiments of the present application may be further increased or limited by one or more of the following combinations on the basis of the above specific embodiments.

[0019] like Figure 1-3 As shown, The probe body includes a waveguide tube 3 , one end of which is arranged in the connection end of the connector 1 , and a signal amplifying component 5 is arranged at the other end of the waveguide tube 3 .

[0020] The signal can be transmitted from the signal amplifying component 5 to the meter head connected to the connector 1 through the waveguide 3, thereby completing the signal transmission work.

[0021] The signal amplifying component 5 includes a signal concentrating tube 51, a signal amplifying plate 52 and a signal transmission tube 53. A signal reflecting plate 54 is provided at the end of the signal transmission tube 53, with a gap between the signal reflecting plate 54 and the signal transmission tube 53. The signal concentrating tube 51 is connected to the other end of the waveguide 3, the signal amplifying plate 52 is arranged at the other end of the signal concentrating tube 51, the signal concentrating tube 51, the signal amplifying plate 52 and the signal transmission tube 53 are integrally formed, the signal transmission tube 53 is arranged on the signal amplifying plate 52, and the protective component 6 is arranged on the signal amplifying plate 52; The interiors of the waveguide tube 3, the signal concentrating tube 51, the signal amplifying plate 52 and the signal transmission tube 53 are all hollow and interconnected for signal transmission.

[0022] The signal transmitted through the waveguide 3 is first transmitted to the signal concentrator 51, and then transmitted to the signal transmission tube 53 through the signal concentrator 51. The signal is then transmitted from the signal transmission tube 53 to the signal reflection plate 54, and the signal reflection plate 54 reflects the signal to the signal amplifier plate 52. Since the signal amplifier plate 52 is in a truncated cone or horn shape, the angle of the signal at this point will change according to the shape of the signal amplifier plate 52, thereby completing the amplification of the signal. It is also known that the signal is transmitted in the cavity. Therefore, in order to ensure the transmission rate, the diameter of the cavity in the waveguide tube 3 must 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 point connected with the waveguide tube 3 is the same as the diameter inside the waveguide tube 3, and the diameter connected with 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 it is transmitted to the signal amplification component 5, thereby increasing the signal transmission rate.

[0023] The protection component 6 includes a protection cover 61 and a protection plate 62. The protection plate 62 is arranged at one end of the protection cover 61 for sealing. The other end of the protection cover 61 is arranged on the signal amplifier board 52 and is integrally formed to completely cover the signal amplifier board 52.

[0024] The signal amplifying component 5 can be covered by the protective cover 61 to play a protective role. The protective cover 61 is made of titanium alloy and can withstand higher temperatures. After the signal amplifying component 5 is installed, the protective plate 62 is sealed and fixed by high-temperature resistant glue. Since the protective plate 62 needs to directly contact the material in the tank body, it can be made of wear-resistant materials such as alumina ceramics, silicon nitride ceramics, silicon carbide ceramics, hexagonal boron nitride ceramics, etc., and the above materials can also penetrate signals, ensuring high temperature resistance and wear resistance without affecting the transmission of signals.

[0025] The probe also includes a connecting component, which is arranged on the probe body and is used to reinforce the signal amplifying component 5. The connecting component includes a locking nut 4, which is threadedly connected to the waveguide 3 and abuts against the signal concentrating tube 51.

[0026] Since the signal amplifying component 5 is not integrally formed with the waveguide tube 3 but is threadedly connected to the waveguide tube 3 via the signal concentrating tube 51, the stability of the connection can be further ensured by tightening the locking nut 4 to prevent the signal transmission from being affected by looseness at a later time.

[0027] The heat insulating component comprises a gasket 2, which is arranged in the connection end of the joint 1, and one end of the waveguide 3 located in the joint 1 abuts against the gasket 2. A heat sink 7 is arranged on the waveguide 3.

[0028] Since there is a cavity inside the waveguide 3, and one end of the waveguide 3 is directly plugged into the connector 1, the high-temperature steam in the tank will penetrate upward through the cavity, and the waveguide 3 and the connector 1 can be separated and sealed by the gasket 2 to prevent the high-temperature steam from penetrating; the gasket 2 is made of polytetrafluoroethylene (PTFE), polyoxymethylene (POM), polyamide (PA) (nylon), polyetheretherketone (PEEK) and other materials, which have good high-temperature resistance, and because it is completely sealed, the signal needs to penetrate the gasket 2, and the use of the above materials can make the signal penetrate, so as not to affect the transmission of the signal. The heat sink 7 can increase the heat dissipation area of ​​the waveguide 3 itself, thereby increasing heat dissipation.

[0029] In summary, through structural improvement, the level switch can be used in high-temperature tanks with a maximum temperature of up to 1200°C. First, the heat insulation component can ensure that the level switch has good sealing properties to prevent high-temperature steam in the tank from penetrating into the interior and causing damage to it; further, the protective component 6 is used to protect the signal amplification component 5 extending into the tank to prevent it from being worn by the material; and the signal amplification component 5 is also made on its main structure to enhance its transmission signal, thereby achieving a better signal transmission effect.

[0030] The above description is only a preferred specific implementation manner of the present invention, and is not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Ultra-high temperature microwave level switch, characterized in that: Includes the probe body, and A connector, which is disposed on one end of the probe body and is used to connect to an external meter head; A signal amplifying component, which is disposed at the other end of the probe body and is used to enhance the transmission signal; a protective component, the protective component being arranged on the signal amplifying component and being used for protecting the signal amplifying component; A heat insulating component is arranged in the joint to isolate heat and prevent hot air from entering the external meter head through the joint.

2. The ultra-high temperature microwave level switch according to claim 1, characterized in that: It also includes a connecting component, which is arranged on the probe body and is used to reinforce the signal amplifying component.

3. The ultra-high temperature microwave level switch according to claim 2, characterized in that: The probe body comprises a waveguide, one end of which is arranged in the connecting end of the connector, and the signal amplifying component is arranged at the other end of the waveguide.

4. The ultra-high temperature microwave level switch according to claim 3, characterized in that: The signal amplification component includes a signal concentrating tube, a signal amplifying plate and a signal transmission tube. A signal reflecting plate is provided at the end of the signal transmission tube, and a gap is left between the signal reflecting plate and the signal transmission tube. The signal concentrating tube is connected to the other end of the waveguide tube, the signal amplifying board is arranged at the other end of the signal concentrating tube, the signal transmission tube is arranged on the signal amplifying board, and the protective component is arranged on the signal amplifying board; The waveguide tube, the signal concentrating tube, the signal amplifying plate and the signal transmission tube are all hollow inside and are interconnected for signal transmission.

5. The ultra-high temperature microwave level switch according to claim 4, characterized in that: The protective component includes a protective cover and a protective plate, wherein the protective plate is arranged at an open end of the protective cover for sealing; The other end of the protective cover is arranged on the signal amplifying board and is integrally formed to completely cover the signal amplifying board.

6. The ultra-high temperature microwave level switch according to claim 4, characterized in that: The connecting component comprises a locking nut, which is threadedly connected to the waveguide and abuts against the signal concentrating tube.

7. The ultra-high temperature microwave level switch according to claim 4, characterized in that: The heat insulation component includes a gasket, which is arranged in the connecting end of the joint, and one end of the waveguide located in the joint abuts against the gasket.

8. The ultra-high temperature microwave level switch according to claim 3, characterized in that: The waveguide is provided with a heat sink.

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