Microwave level meter with purging function

Abstract

The utility model discloses a microwave level meter with a purging function, which relates to the field of level instruments and comprises a protective casing with a top cover mounted at the top, a microwave level meter is fixedly mounted on the inner wall of the protective casing, a wire hole is mounted on the periphery of the protective casing, an inner cavity of the wire hole is communicated with an inner cavity of the top cover, and the microwave level meter is fixedly mounted on the inner wall of the protective casing. The wire hole is used for allowing a wire of the microwave level meter to penetrate out, a vertical pipe is installed on a bottom end plate of the protection shell through a bolt and a nut, and silicon carbide glass is installed between the upper portion of the vertical pipe and the bottom end of the protection shell. And a purging cooling mechanism extending to the top end of the vertical pipe is mounted on the protective shell. According to the utility model, the black silicon carbide glass and the purging and cooling mechanism are arranged, so that accurate and firm operation of the device under a high-temperature condition is realized, and the influence of dust accumulated on the surface of the silicon carbide glass on a microwave signal output by the microwave level meter is avoided.

Description

Technical Field

[0001] The utility model relates to the field of level instruments, in particular to a microwave level meter with a purge function. Background Art

[0002] Microwave level meters have become a very common instrument in industrial process measurement applications. In the steel industry, due to the high process temperature, molten iron is 1400℃ and molten steel is around 1600℃. Although non-contact measurement is used, the target temperature is very high, and heat conduction occurs through thermal radiation, air convection, etc., which will cause the ambient temperature around the instrument to be very high, up to about 200℃, affecting the operating accuracy of the microwave level meter. Utility Model Content

[0003] The purpose of the present utility model is to provide a microwave level meter with a purge function in order to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: a microwave level meter with a purge function, comprising a protective housing with a top cover mounted on top, a microwave level meter fixedly mounted on the inner wall of the protective housing, a wire hole mounted on the outer periphery of the protective housing, the inner cavity of the wire hole communicating with the inner cavity of the top cover, and the wire hole being used for allowing the wires of the microwave level meter to pass through, a standpipe mounted on the bottom end plate of the protective housing via bolts and nuts, and silicon carbide glass mounted between the upper portion of the standpipe and the bottom end of the protective housing;

[0005] A purge cooling mechanism extending to the top of the riser is installed on the protective shell, and the purge cooling mechanism is used to cool the microwave level meter and the silicon carbide glass to prevent heat accumulation on the microwave level meter and the silicon carbide glass.

[0006] As a further solution of the present invention: the purge cooling mechanism includes an upper air inlet fixedly connected to the outer wall of the protective shell, the inner cavity of the upper air inlet is connected to the inner cavity of the protective shell, the input end of the upper air inlet is connected to an upper connecting pipe, the upper connecting pipe is connected to an output port of the tee pipe, the lower output port of the tee pipe is connected to a lower connecting pipe, and the output end of the lower connecting pipe is connected to the lower air inlet.

[0007] As a further solution of the present invention: the input port of the three-way pipe is connected to an external air pump through a pipeline.

[0008] As a further solution of the present invention: the purge cooling mechanism also includes a blowing ring fixedly connected to the top of the riser, the blowing ring is provided with a docking hole connected to the output end of the lower air inlet hole, the blowing ring is provided with an annular groove in an annular structure at the output end of the docking hole, the inner periphery of the docking hole is provided with a plurality of blowing holes equidistantly arranged in the circumferential direction, the blowing holes are connected to the annular groove, and the inner periphery of the blowing ring is fixedly connected to the outer periphery of the silicon carbide glass.

[0009] As a further solution of the present invention: a ventilation hole communicating with the outside is opened on the bottom end plate of the top cover.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. By setting up black silicon carbide glass and purge cooling mechanism, the device can operate accurately and reliably under high temperature conditions, and avoid the influence of dust accumulated on the surface of silicon carbide glass on the microwave signal output by the microwave level meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0014] Figure 3 For the utility model Figure 2 A partial enlarged view of point A in the middle.

[0015] In the figure: 1. Top cover; 2. Protective shell; 3. Wire hole; 4. Upper air inlet; 5. Tee; 6. Upper connecting pipe; 7. Lower connecting pipe; 8. Lower air inlet; 9. Vertical pipe; 10. Microwave level meter; 11. Silicon carbide glass; 12. Blowing ring; 13. Docking hole; 14. Blowing hole; 15. Ventilation hole; 16. Annular groove. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figures 1 to 3In an embodiment of the utility model, a microwave level meter with a purge function includes a protective shell 2 with a top cover 1 installed on the top, a microwave level meter 10 is fixedly installed on the inner wall of the protective shell 2, a wire hole 3 is installed on the outer periphery of the protective shell 2, the inner cavity of the wire hole 3 is connected to the inner cavity of the top cover 1, and the wire hole 3 is used for allowing the wires of the microwave level meter 10 to pass through, a standpipe 9 is installed on the bottom end plate of the protective shell 2 through bolts and nuts, and a silicon carbide glass 11 is installed between the top of the standpipe 9 and the bottom end of the protective shell 2; a purge cooling mechanism extending to the top of the standpipe 9 is installed on the protective shell 2, and the purge cooling mechanism is used to cool the microwave level meter 10 and the silicon carbide glass 11 to prevent heat accumulation on the microwave level meter 10 and the silicon carbide glass 11.

[0018] In this embodiment, when the device is used to measure the material liquid level, the external air pump is started to input room temperature air into the purge cooling mechanism. The room temperature air acts on the microwave level meter 10 and the silicon carbide glass 11 through the purge cooling mechanism, thereby avoiding heat accumulation and preventing inaccurate measurement results of the microwave level meter 10 due to excessive temperature. At the same time, the black silicon carbide glass 11 can absorb radiation well, and does not allow thermal radiation to pass through the silicon carbide glass 11 and directly contact the antenna surface of the microwave level meter 10. The isolation of the silicon carbide glass 11 can also isolate heat conduction caused by hot air convection.

[0019] Please refer to Figure 1 、 Figure 2 and Figure 3 The purging and cooling mechanism includes an upper air inlet 4 fixedly connected to the outer wall of the protective shell 2, the inner cavity of the upper air inlet 4 is connected to the inner cavity of the protective shell 2, the input end of the upper air inlet 4 is connected to an upper connecting pipe 6, the upper connecting pipe 6 is connected to an output port of the tee pipe 5, the lower output port of the tee pipe 5 is connected to a lower connecting pipe 7, and the output end of the lower connecting pipe 7 is connected to the lower air inlet 8. The purging and cooling mechanism also includes a blowing ring 12 fixedly connected to the top of the riser 9, the blowing ring 12 is provided with a docking hole 13 connected to the output end of the lower air inlet 8, the interior of the blowing ring 12 is provided with an annular groove 16 in an annular structure at the output end of the docking hole 13, the inner circumference of the docking hole 13 is provided with a plurality of blowing holes 14 equidistantly around the inner periphery of the docking hole 13, the blowing holes 14 are connected to the annular groove 16, and the inner periphery of the blowing ring 12 is fixedly connected to the outer periphery of the silicon carbide glass 11.

[0020] In this embodiment, by starting the external air pump, the external air pump inputs room-temperature air into the input port of the tee pipe 5 and diverts the air from the two output ports of the tee pipe 5. A portion of the room-temperature air is blown into the protective housing 2 through the upper connecting pipe 6, thereby dissipating the heat of the microwave level meter 10 in the protective housing 2. Another portion of the room-temperature air enters the lower air inlet 8 through the lower connecting pipe 7, and enters the annular groove 16 through the lower air inlet 8 and the docking hole 13, and is then blown out from the multiple blowing holes 14. The room-temperature air blown out from the blowing holes 14 can cool the silicon carbide glass 11 and blow away dust accumulated on the surface of the silicon carbide glass 11, thereby avoiding affecting the microwave signal transmission of the radar of the microwave level meter 10.

[0021] Please refer to Figure 1 The input port of the tee pipe 5 is connected to the external air pump through a pipeline.

[0022] In this embodiment, the air pump is started to input ambient air at room temperature into the three-way pipe 5 through the pipeline.

[0023] Please refer to Figure 2 A ventilation hole 15 communicating with the outside is provided on the bottom end plate of the top cover 1.

[0024] In this embodiment, the provision of the ventilation holes 15 allows the room temperature air entering the protective housing 2 to be discharged from the ventilation holes 15 after blowing and dissipating heat to the microwave level meter 10, thereby forming an effective air circulation channel.

[0025] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A microwave level meter with a purge function, comprising a protective housing (2) with a top cover (1) mounted on the top, a microwave level meter (10) fixedly mounted on the inner wall of the protective housing (2), characterized in that: A wire hole (3) is installed on the outer periphery of the protective shell (2), the inner cavity of the wire hole (3) is connected to the inner cavity of the top cover (1), and the wire hole (3) is used for allowing the wire of the microwave level meter (10) to pass through. The bottom end plate of the protective shell (2) is installed with a standpipe (9) through bolts and nuts, and silicon carbide glass (11) is installed between the upper part of the standpipe (9) and the bottom end of the protective shell (2); A purge cooling mechanism extending to the top of the riser (9) is installed on the protective housing (2). The purge cooling mechanism is used to cool the microwave level meter (10) and the silicon carbide glass (11) to prevent heat from accumulating on the microwave level meter (10) and the silicon carbide glass (11).

2. The microwave level meter with a purge function according to claim 1, characterized in that: The purge cooling mechanism comprises an upper air inlet (4) fixedly connected to the outer wall of the protective shell (2), the inner cavity of the upper air inlet (4) is connected to the inner cavity of the protective shell (2), the input end of the upper air inlet (4) is connected to an upper connecting pipe (6), the upper connecting pipe (6) is connected to an output port of the three-way pipe (5), the lower output port of the three-way pipe (5) is connected to a lower connecting pipe (7), and the output end of the lower connecting pipe (7) is connected to the lower air inlet (8).

3. The microwave level meter with a purge function according to claim 2, characterized in that: The input port of the tee pipe (5) is connected to an external air pump through a pipeline.

4. The microwave level meter with a purge function according to claim 3, characterized in that: The purge cooling mechanism further comprises an air blowing ring (12) fixedly connected to the top of the riser (9), the air blowing ring (12) is provided with a docking hole (13) connected to the output end of the lower air inlet (8), the air blowing ring (12) is provided with an annular groove (16) in an annular structure at the output end of the docking hole (13), the inner periphery of the docking hole (13) is provided with a plurality of air blowing holes (14) equidistantly around the inner periphery, the air blowing holes (14) are communicated with the annular groove (16), and the inner periphery of the air blowing ring (12) is fixedly connected to the outer periphery of the silicon carbide glass (11).

5. The microwave level meter with a purge function according to claim 1, characterized in that: A ventilation hole (15) communicating with the outside is provided on the bottom end plate of the top cover (1).

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