Heat insulation device for radar level meter

Abstract

The utility model discloses a heat insulation device for a radar level meter. The heat insulation device comprises a heat insulation cover, a heat insulation pipe and heat insulation glass. The level meter body is sleeved with the heat insulation cover, the antenna is sleeved with the heat insulation pipe through one end of the heat insulation pipe, and the heat insulation glass and the heat insulation pipe are fixedly installed so that the interior of the heat insulation pipe can be separated. According to the heat insulation device for the radar level meter, the main body part of the radar level meter is protected through the heat insulation cover, and effective high-temperature isolation is formed through the heat insulation pipe and the heat insulation glass, so that the temperature of the space where the level meter main body is located is relatively reduced, and the problem that an electronic chip in the level meter main body loses efficacy in a high-temperature environment is solved. And finally, low-temperature gas can be input through an external gas source to further take away high temperature, and effective passive heat insulation and active cooling are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the heat insulation technical field of radar level meter, specifically about a kind of heat insulation device for radar level meter. BACKGROUND

[0002] Radar level meter is the level meter based on time domain reflection principle (TDR), and the electromagnetic pulse of radar level meter propagates at the speed of light, when encountering the surface of measured medium, part of the pulse of radar level meter is reflected to form echo and returns to pulse transmitting device along the same path, the distance between transmitting device and the surface of measured medium is proportional to the propagation time of pulse therebetween, and the height of material level is obtained by calculation. It plays a very important role in industrial process monitoring.

[0003] Due to the excellent performance of radar level meter, it is widely used in industrial automation production field, and is often deployed in high temperature environment. In order to realize heat insulation, the existing product is lifted and installed to avoid high temperature, thereby affecting the arrangement of field operation space and bringing inconvenience to use and installation.

[0004] The information disclosed in this BACKGROUND section is only intended to increase an understanding of the general background of the application, and should not be construed as recognition or admission that this information is prior art that is already known in this field. SUMMARY

[0005] The utility model aims at providing a kind of heat insulation device for radar level meter, it can provide heat insulation protection for radar level meter.

[0006] To achieve the above object, the technical scheme provided by the utility model in one embodiment is as follows:

[0007] A kind of heat insulation device for radar level meter, the radar level meter includes fixed installation's level meter main body and antenna, the heat insulation device includes heat shield, heat insulation pipe and heat insulation glass, the heat shield is sleeved and installed in the outside of the level meter main body, the heat insulation pipe is sleeved in the outside of the antenna by one end thereof, the heat insulation glass is fixedly installed with the heat insulation pipe to separate the inside of the heat insulation pipe.

[0008] In one or more embodiments of the utility model, first air inlet and first air outlet are provided on the heat shield, and the first air inlet is connected with external air source.

[0009] In one or more embodiments of the utility model, the first air outlet is arranged close to external heat source, and the first air inlet is arranged away from the external heat source.

[0010] In one or more embodiments of the utility model, the heat insulation pipe includes first pipe body and second pipe body, the first end of first pipe body is sleeved in the outside of antenna, the heat insulation glass is installed between the second end of first pipe body and the first end of second pipe body, and the heat insulation glass separates the inside of first pipe body from the inside of second pipe body.

[0011] In one or more embodiments of the utility model, the second air inlet hole is connected with external air source.

[0012] In one or more embodiments of the utility model, the second air outlet hole is arranged close to external heat source, and the second air inlet hole is arranged away from external heat source.

[0013] In one or more embodiments of the utility model, the third air inlet hole is arranged on second pipe body and is connected with external air source.

[0014] In one or more embodiments of the utility model, the third air inlet hole is arranged away from external heat source.

[0015] In one or more embodiments of the utility model, the included angle a between heat insulation glass and radar wave emission direction of radar level meter satisfies: a < 90°.

[0016] In one or more embodiments of the utility model, heat dissipation structure is arranged on heat insulation pipe and / or heat insulation cover.

[0017] Compared with prior art, the heat insulation device for radar level meter of the utility model protects the main part of radar level meter through heat insulation cover, forms effective high temperature insulation through heat insulation pipe and heat insulation glass, thereby relatively reduces the temperature of space where level meter main body is located, solves the problem of failure of electronic chip inside level meter main body under high temperature environment. Finally, low temperature gas can be further taken away through external air source input, realizes effective passive heat insulation and active cooling. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments in the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 It is the side view of the heat insulation device of radar level meter in an embodiment of the utility model. DETAILED DESCRIPTION

[0020] In order to make the technical scheme in the utility model better understood by the person skilled in the art, the technical scheme in the utility model embodiments will be clearly and completely described below in conjunction with the drawings of the utility model embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the utility model.

[0021] The words such as "first", "second" and the like in the specification are mainly used to distinguish one technical feature from another technical feature, and do not necessarily require or imply a certain actual relationship, quantity or order between the technical features.

[0022] In the detailed description of the specification, the drawings forming a part thereof are referred to, in which the same reference numerals represent the same components at all times, and in which the exemplary embodiments can be shown by way of example. It should be understood that other embodiments can be utilized and structural or logical changes can be made without departing from the scope of the utility model. Therefore, the following detailed description should not be regarded as limiting.

[0023] The various operations in the specification can be described in sequential order. However, the order of the description should not be interpreted as implying a sequential relatedness of the operations. Specifically, the operations can not be performed in the order presented. The described operations can be performed in a different order than described. Various additional operations can be performed and / or described operations can be omitted in additional embodiments.

[0024] The specification describes using the phrases "in an embodiment" or "in other embodiments" or "in some embodiments", which can each refer to one or more of the same or different embodiments. In addition, the terms "comprising", "containing", "having" and the like used with respect to the embodiments of the utility model are synonymous.

[0025] As Figure 1As shown, the heat insulation device for the radar level meter in the embodiment of the utility model includes a heat shield 10, a heat insulation pipe 20 and heat insulation glass 30 (part of the schematic is shown by the dotted line in the figure). In an embodiment, the radar level meter includes a fixedly installed level meter body 41 and an antenna 42, wherein the inside of the level meter body 41 is provided with a circuit assembly for driving the antenna 42 to emit a microwave signal and processing a reflected signal received by the antenna 42. The antenna 42 is installed at the bottom of the level meter body 41 and is connected with the circuit assembly, and the outside of the antenna 42 is covered with an outer shell of a low dielectric constant material such as tetrafluoroethylene, PEEK, glass and the like insulating material, so as to ensure that the radar electromagnetic wave signal can be transmitted through and not reflected. The antenna 42 is arranged towards a medium to be measured, and the medium to be measured has a high temperature. The level meter body 41 and the antenna 42 of the radar level meter can be realized by using the prior art.

[0026] Specifically, the heat shield 10 is sleeved and installed outside the level meter body 41, the heat insulation pipe 20 is sleeved outside the antenna 42 through one end thereof, and the heat insulation glass 30 is fixedly installed with the heat insulation pipe 20 to separate the inside of the heat insulation pipe.

[0027] The heat shield 10 can insulate the ambient temperature outside the level meter body 41, protect the level meter body 41 itself from high-temperature heat impact and avoid damage to the circuit assembly caused by high temperature. By separating the inside of the heat insulation pipe 20 through the heat insulation glass 30, two heat insulation chambers can be formed to block the diffusion of high temperature to the radar level meter. The glass has good properties such as high hardness, wear resistance, high temperature resistance, good electrical insulation and chemical stability, and at the same time, it also has low thermal conductivity, so that the glass can isolate heat and relatively reduce the temperature in the electronic cavity space without blocking the radar microwave signal.

[0028] In an embodiment, the heat shield 10 and the heat insulation pipe 20 can both be made of stainless steel. The heat shield 10 can be in a cylindrical shape, and has a mounting hole at the bottom. When the radar level meter is placed inside the heat shield 10, the antenna 42 of the radar level meter can protrude out of the heat shield 10 from the mounting hole. The heat shield 10 can be installed at the bottom of the level meter body 41 through the mounting hole by means of threaded connection, plug-in connection, welding and the like.

[0029] The top end of the heat insulation pipe 20 is sleeved outside the antenna 42, and the top end of the heat insulation pipe 20 can be installed at the bottom of the heat shield 10 by means of threaded connection, plug-in connection, welding and the like, or can be installed at the bottom of the level meter body 41 by means of threaded connection, plug-in connection, welding and the like.

[0030] In one embodiment, the heat insulation tube 20 may include a first tube body 21 and a second tube body 22. A first end of the first tube body 21 is sleeved on the outside of the antenna 42. A heat-insulating glass 30 is installed between the second end of the first tube body 21 and the first end of the second tube body 22, separating the interior of the first tube body 21 from the interior of the second tube body 22. Thus, a heat-insulating chamber is formed inside the first tube body 21 and the second tube body 22, respectively. The heat-insulating glass 30 can be fixedly installed to the first tube body 21 and the second tube body 22 via flanges.

[0031] In other embodiments, the heat insulation tube 20 may also be an integral structure, and the heat insulation glass 30 may also be installed inside the heat insulation tube 20.

[0032] like Figure 1 As shown, in one embodiment, the heat insulation cover 10 is provided with a first air inlet 11 and a first exhaust outlet 12 (in one embodiment, the first exhaust outlet 12 is located at the bottom of the heat insulation cover 10), and the first air inlet 11 is connected to an external air source. The external air source can inject low-temperature air into the heat insulation cover 10 through the first air inlet 11 to further reduce the ambient temperature of the level gauge body 41.

[0033] Furthermore, the first air inlet 11 is positioned away from the external heat source, while the first exhaust port 12 is positioned close to the external heat source. The external heat source can be the medium being measured or other heat sources. When the external air source injects low-temperature air into the heat insulation cover 10, it can reduce the temperature peak around the level gauge body 41 and prevent the airflow from pushing the high-temperature gas towards the level gauge body 41.

[0034] like Figure 1 As shown, in one embodiment, the first tube 21 is provided with a second air inlet 23 and a second air outlet 24, and the second air inlet 23 is connected to an external air source. The external air source can inject low-temperature air into the first tube 21 through the second air inlet 23 to further reduce the temperature inside the first tube 21.

[0035] Furthermore, the second air inlet 23 is positioned away from the external heat source, while the second exhaust outlet 24 is positioned close to the external heat source. When the external air source injects low-temperature air into the first tube 21, it can reduce the temperature peak around the antenna 42 and prevent the airflow from pushing high-temperature gas toward the antenna 42.

[0036] like Figure 1 As shown, in one embodiment, the second tube 22 is provided with a third air inlet 25 connected to an external air source. The external air source can inject low-temperature air into the second tube 22 through the third air inlet 25, further reducing the ambient temperature inside the second tube 22.

[0037] Furthermore, the third air inlet 25 is positioned away from the external heat source, allowing low-temperature airflow to flow in through the third air inlet 25 and exit outward from the second end of the second tube 22, thereby reducing the process temperature between the radar level gauge and the high-temperature measured medium.

[0038] In one embodiment, the external heat source can be the medium to be measured, which is located below the radar level gauge. In this case, the first air inlet 11 is located at the upper part of the heat shield 10, and the first exhaust port 12 is located at the bottom of the heat shield 10. The second air inlet 23 is located at the upper part of the first pipe body 21, and the second exhaust port 24 is located at the lower part of the first pipe body 21. The third air inlet 25 is located at the upper part of the second pipe body 22.

[0039] Of course, it is understandable that a third vent can also be provided on the second tube 22, and the third vent can also be located near an external heat source.

[0040] In one embodiment, the first air inlet 11, the second air inlet 23, and the third air inlet 25 can be connected to an external air source via an air pipe connector.

[0041] like Figure 1 As shown, the angle α between the heat-insulating glass 30 and the radar wave emission direction of the radar level gauge satisfies: α < 90°.

[0042] In one embodiment, the radar wave emission direction of the radar level gauge is vertically downward, and the angle between the heat-insulating glass 30 and the radar wave emission direction of the radar level gauge is the angle between the heat-insulating glass 30 and the vertical direction.

[0043] By creating a certain angle between the heat-insulating glass 30 and the direction of radar wave emission, radar wave reflection can be reduced, radar wave penetration can be increased, and radar wave reflection interference on the glass surface can be eliminated.

[0044] like Figure 1 As shown, a heat dissipation structure 26 is provided on the heat insulation pipe 20. In one embodiment, the heat dissipation structure 26 can be a heat dissipation fin, heat dissipation serrations, or other structures integrally formed on the heat dissipation pipe, or it can be a heat dissipation pipe, heat dissipation graphite, or other structures mounted on the heat dissipation pipe. In other embodiments, the heat dissipation structure 26 can also be provided on the heat insulation cover 10, or the heat dissipation structure 26 can be provided on both the heat insulation cover 10 and the heat insulation pipe 20.

[0045] like Figure 1 As shown, the end of the heat insulation pipe 20 near the medium to be tested is provided with a mounting component 27 for fixed installation at the installation location. In one embodiment, the mounting component 27 is a flange, and the installation location is a liquid storage tank, which can be fixedly installed to the storage tank.

[0046] In actual use, the heat insulation device for the radar level meter can be installed on the storage tank containing high-temperature medium to be measured through the mounting part 27. The heat insulation pipe 20 and the heat insulation glass 30 form effective high-temperature insulation between the radar level meter and the medium to be measured. The heat insulation cover 10 insulates the high temperature around the level meter body, ensures that the level meter body, especially the circuit part therein, is not impacted by high-temperature heat, and protects the circuit structure.

[0047] By arranging the air inlet hole and the air outlet hole on the heat insulation cover 10 and the heat insulation pipe 20, the external low-temperature gas can enter the heat insulation cover 10 and the heat insulation pipe 20, further reduces the temperature around the radar level meter, and prevents the high-temperature gas from flowing to the radar level meter, and actively cools.

[0048] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0049] In addition, it should be understood that although the present application is described in the specification in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A heat shield for a radar level gauge, the radar level gauge comprising a fixedly mounted level gauge body and an antenna, characterized in that, The heat insulation device comprises a heat insulation cover, a heat insulation pipe and heat insulation glass, the heat insulation cover is sleeved on the outside of the main body of the level meter, the heat insulation pipe is sleeved on the outside of the antenna through one end, and the heat insulation glass is fixedly installed with the heat insulation pipe to separate the inside of the heat insulation pipe.

2. The thermal isolation device for a radar level gauge according to claim 1, characterized in that, The heat insulation cover is provided with a first air inlet hole and a first air outlet hole, and the first air inlet hole is connected with an external air source.

3. The thermal insulation arrangement for a radar level gauge according to claim 2, characterized in that, The first air outlet hole is arranged close to an external heat source, and the first air inlet hole is arranged away from the external heat source.

4. The thermal isolation device for a radar level gauge according to claim 1, characterized in that, The heat insulation pipe comprises a first pipe body and a second pipe body, the first end of the first pipe body is sleeved on the outside of the antenna, the heat insulation glass is installed between the second end of the first pipe body and the first end of the second pipe body, and the heat insulation glass separates the inside of the first pipe body from the inside of the second pipe body.

5. The thermal insulation arrangement for a radar level gauge according to claim 4, characterized in that, The first pipe body is provided with a second air inlet hole and a second air outlet hole, and the second air inlet hole is connected with an external air source.

6. The thermal insulation arrangement for a radar level gauge according to claim 5, characterized in that, The second air outlet hole is arranged close to an external heat source, and the second air inlet hole is arranged away from the external heat source.

7. The thermal insulation arrangement for a radar level gauge according to claim 4, characterized in that, The second pipe body is provided with a third air inlet hole connected with an external air source.

8. The thermal insulation arrangement for a radar level gauge according to claim 7, characterized in that, The third air inlet hole is arranged away from an external heat source.

9. The thermal insulation arrangement for a radar level gauge according to claim 1, characterized in that, The included angle a between the heat insulation glass and the radar wave emission direction of the radar level meter satisfies: a < 90°.

10. The thermal isolation apparatus for a radar level gauge according to claim 1, characterized in that, The heat insulation pipe and / or the heat insulation cover are provided with a heat dissipation structure.

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