High-temperature microwave level switch

Abstract

The invention discloses a high-temperature microwave level switch which comprises an installation part and a signal transmission part, the two ends of the installation part are the open end and the sealed end respectively, the signal transmission part is arranged on the installation part, and one end of the signal transmission part is located in the installation part and used for transmitting signals. The joint is arranged on the signal transmission component and is used for connecting an external meter head; the signal amplification sealing component is arranged in the signal transmission component and is used for enhancing transmission signals, isolating hot air and sealing at the same time; and the heat insulation part is arranged at the opening end of the mounting part and used for insulating heat outside the mounting part.

Description

Technical Field

[0001] The invention relates to the technical field of level switches, and in particular to a 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 object of the present invention is to provide a high-temperature microwave level switch.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: A high-temperature microwave level switch comprises a mounting component, wherein two ends of the mounting component are an open end and a sealed end, and A signal transmission component, which is disposed on the mounting component and has one end located inside the mounting component, and is used to transmit signals; A connector, which is arranged on the signal transmission component and is used to connect to an external meter head; A signal amplifying sealing component, which is disposed in the signal transmission component and is used to enhance the transmission signal while isolating heat and sealing; A heat insulating component is arranged at the open end of the installation component to isolate the heat outside the installation component.

[0006] Preferably, the mounting component comprises a protective cover and a flange, wherein the flange is arranged on the protective cover, and one end of the protective cover is an open end, and the other end is a sealed end; The signal transmission component is arranged on the protective cover and partially passes through the sealing end and is located inside the protective cover. The heat insulation component is arranged at the open end.

[0007] Preferably, the signal transmission component comprises a first waveguide tube and a second waveguide tube formed in one piece, and the interiors of the first waveguide tube and the second waveguide tube are hollow; The first waveguide is arranged on the protective cover and partially extends into the interior of the protective cover through the sealing end, the second waveguide is connected to one end of the first waveguide extending into the interior of the protective cover, and the second waveguide is in the shape of a truncated cone horn; The signal amplifying sealing component is disposed inside the first waveguide and the second waveguide, and the joint is disposed at an end of the first waveguide.

[0008] Preferably, the signal amplifying sealing component comprises a first plug, a second plug and a third plug, and the first plug and the second plug are integrally formed; The first plug is arranged in the first waveguide tube, the second plug is arranged in the second waveguide tube, the second plug is in the shape of a truncated cone horn and fits with the second waveguide tube; the third plug is arranged in the first waveguide tube at one end close to the joint.

[0009] Preferably, the heat insulation component includes a heat insulation plate and a locking nut, the heat insulation plate is arranged at the open end and abuts against the end of the second waveguide tube, and the locking nut is threadedly connected to the inner wall of the protective cover for tightening the locking nut.

[0010] Preferably, the first plug and the third plug are both provided with surrounding sealing rings, and the sealing rings abut against the inner wall of the first waveguide tube.

[0011] Preferably, a gasket is provided between the locking nut and the heat insulation board and is tightened by the locking nut.

[0012] Preferably, the sealing ring located between the second waveguide tube and the heat insulation board is also provided inside the protective cover.

[0013] In summary, the beneficial technical effects of the present invention are: Firstly, the signal amplification sealing component can ensure that the level switch has good sealing performance, preventing high-temperature steam in the tank from penetrating into the interior and causing damage to it. It also has a signal amplification function, which makes the signal transmission effect better. The heat insulation component further isolates the high temperature in the tank, making the overall structure more resistant to high temperatures. 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 of the explosion structure of the centerline section of the present invention.

[0015] Figure numerals: 1. Installation component; 11. Protective cover; 12. Flange; 2. Signal transmission component; 21. First waveguide tube; 22. Second waveguide tube; 3. Connector; 4. Signal amplification sealing component; 41. First plug; 42. Second plug; 43. Third plug; 5. Heat insulation component; 51. Heat insulation board; 52. Locking nut; 53. Gasket; 6. Sealing ring. 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 a high-temperature microwave level switch, comprising a mounting component 1, wherein the two ends of the mounting component 1 are an open end and a sealed end respectively, and a signal transmission component 2, wherein the signal transmission component 2 is arranged on the mounting component 1, and one end of the signal transmission component 2 is located inside the mounting component 1 for transmitting signals; a connector 3, wherein the connector 3 is arranged on the signal transmission component 2 for connecting an external meter head; a signal amplifying sealing component 4, wherein the signal amplifying sealing component 4 is arranged inside the signal transmission component 2 for enhancing the transmission signal while isolating heat and sealing; and a heat insulating component 5, wherein the heat insulating component 5 is arranged at the open end of the mounting component 1 for isolating heat outside the mounting component 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 mounting component 1 comprises a protective cover 11 and a flange 12. The flange 12 is arranged on the protective cover 11. One end of the protective cover 11 is an open end, and the other end is a sealed end. The signal transmission component 2 is disposed on the protective cover 11 and partially passes through the sealing end and is located inside the protective cover 11 . The heat insulation component 5 is disposed at the open end.

[0020] The mounting component 1 is an important structure for mounting the entire level switch on the tank body. Specifically, it is first connected to the flange 12 on the tank body through the flange 12 to complete the installation of the entire level switch. After the installation is completed, the protective cover 11 is located inside the tank body. It needs to protect the signal transmission component 2 located inside and needs to isolate the high temperature in the tank body. Therefore, the protective cover 11 is made of titanium alloy. The protective cover 11 and the heat insulation component 5 arranged on the protective cover 11 can ensure that the components located in the mounting component 1 are not affected by the high temperature.

[0021] The signal transmission component 2 includes a first waveguide tube 21 and a second waveguide tube 22 formed in one piece, and the interiors of the first waveguide tube 21 and the second waveguide tube 22 are hollow; The first waveguide tube 21 is arranged on the protective cover 11, and partially extends through the sealing end to the inside of the protective cover 11. The second waveguide tube 22 is connected to one end of the first waveguide tube 21 extending to the inside of the protective cover 11, and the second waveguide tube 22 is in the shape of a truncated cone horn; the signal amplification sealing component 4 is arranged inside the first waveguide tube 21 and the second waveguide tube 22, and the joint 3 is arranged at the end of the first waveguide tube 21.

[0022] The signal is transmitted through the inside of the two waveguides. First, the signal is transmitted to the inside of the first waveguide 21 through the header of the connecting connector 3, and then transmitted from the first waveguide 21 to the second waveguide 22, and the signal is transmitted to one end located inside the tank through the second waveguide 22; and the second waveguide 22 is located in the protective cover 11, and through its own frustum or horn shape, the signal can be dispersed and amplified when it is transmitted to the second waveguide 22, thereby enhancing the transmission of the signal.

[0023] The signal amplifying sealing component 4 includes a first plug 41, a second plug 42 and a third plug 43, and the first plug 41 and the second plug 42 are integrally formed; The first plug 41 is arranged in the first waveguide tube 21 , the second plug 42 is arranged in the second waveguide tube 22 , and the second plug 42 is in the shape of a truncated cone horn and fits with the second waveguide tube 22 ; the third plug 43 is arranged in the first waveguide tube 21 at one end close to the joint 3 .

[0024] By setting up three plugs, the interior of the two waveguides can be sealed to prevent high-temperature steam in the tank from pouring up; the three plugs are made of PI, PET, PAI, PSU, PPS, PEEK, PTFE and other materials, which can ensure that the signal can pass through under the premise of sealing, thereby not affecting the transmission of the signal; and the shape of the second plug 42 is the same as that of the second waveguide 22, so that the signal is also dispersedly amplified when passing through the second plug 42, thereby ensuring the transmission rate of the signal.

[0025] The heat insulating component 5 includes a heat insulating plate 51 and a locking nut 52 . The heat insulating plate 51 is arranged at the open end and abuts against the end of the second waveguide 22 . The locking nut 52 is threadedly connected to the inner wall of the protective cover 11 for tightening the locking nut 52 .

[0026] Since the above-mentioned three plugs need to be installed later, they need to be installed at the open end of the protective cover 11. Therefore, heat insulation is performed by installing a heat insulation plate 51 later. Since the lower end of the protective cover 11 directly contacts or faces the material, the heat insulation plate 51 is made of quartz glass or ceramic materials, which can ensure high temperature resistance while preventing wear caused by the material.

[0027] The first plug 41 and the third plug 43 are both provided with a surrounding sealing ring 6, which abuts against the inner wall of the first waveguide 21. The protective cover 11 is also provided with a sealing ring 6 between the second waveguide 22 and the heat insulation board 51, and the sealing ring 6 can further ensure the sealing of the waveguide to prevent high-temperature steam from pouring up.

[0028] A gasket 53 is provided between the locking nut 52 and the heat insulating board 51 and is compressed by the locking nut 52. The heat insulating board 51 can be further compressed by the gasket 53 to prevent loosening.

[0029] In summary, firstly, the signal amplification sealing component 4 can ensure that the level switch has good sealing properties, preventing high-temperature steam in the tank from penetrating into the interior and causing damage to it, and it also has a signal amplification function, so that the signal transmission effect is better; and the high temperature in the tank is further isolated by the heat insulation component 5, making the overall structure more resistant to high temperatures.

[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. High temperature microwave level switch, characterized in that: It comprises a mounting component, wherein two ends of the mounting component are an open end and a sealed end, and A signal transmission component, which is disposed on the mounting component and has one end located inside the mounting component, and is used to transmit signals; A connector, which is arranged on the signal transmission component and is used to connect to an external meter head; A signal amplifying sealing component, which is disposed in the signal transmission component and is used to enhance the transmission signal while isolating heat and sealing; A heat insulating component is arranged at the open end of the installation component to isolate the heat outside the installation component.

2. The high temperature microwave level switch according to claim 1, characterized in that: The mounting component comprises a protective cover and a flange, wherein the flange is arranged on the protective cover, and one end of the protective cover is an open end, and the other end is a sealing end; The signal transmission component is arranged on the protective cover and partially passes through the sealing end and is located inside the protective cover. The heat insulation component is arranged at the open end.

3. The high temperature microwave level switch according to claim 2, characterized in that: The signal transmission component includes a first waveguide tube and a second waveguide tube formed in one piece, wherein the first waveguide tube and the second waveguide tube are hollow inside; The first waveguide is arranged on the protective cover and partially extends into the interior of the protective cover through the sealing end, the second waveguide is connected to one end of the first waveguide extending into the interior of the protective cover, and the second waveguide is in the shape of a truncated cone horn; The signal amplifying sealing component is disposed inside the first waveguide and the second waveguide, and the joint is disposed at an end of the first waveguide.

4. The high temperature microwave level switch according to claim 3, characterized in that: The signal amplifying sealing component comprises a first plug, a second plug and a third plug, and the first plug and the second plug are integrally formed; The first plug is arranged in the first waveguide tube, the second plug is arranged in the second waveguide tube, the second plug is in the shape of a truncated cone horn and fits with the second waveguide tube; the third plug is arranged in the first waveguide tube at one end close to the joint.

5. The high temperature microwave level switch according to claim 4, characterized in that: The heat insulation component includes a heat insulation plate and a locking nut. The heat insulation plate is arranged at the open end and abuts against the end of the second waveguide tube. The locking nut is threadedly connected to the inner wall of the protective cover for tightening the locking nut.

6. The high temperature microwave level switch according to claim 5, characterized in that: The first plug and the third plug are both provided with surrounding sealing rings, and the sealing rings are in contact with the inner wall of the first waveguide tube.

7. The high temperature microwave level switch according to claim 5, characterized in that: A gasket is provided between the locking nut and the heat insulation board and is compressed by the locking nut.

8. The high temperature microwave level switch according to claim 6, characterized in that: The sealing ring located between the second waveguide tube and the heat insulation board is also provided inside the protective cover.

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