Instrument self-heat-proof and corrosion-proof and heat-insulation device

Abstract

The utility model provides a kind of instrument self heat tracing corrosion protection heat preservation device, belong to the instrument self heat tracing corrosion protection heat preservation field of easy condensing medium, the device includes process pipeline, pressure pipeline, sheet iron layer and thermal insulation cotton layer, the process pipeline is connected with pressure pipeline, sheet iron layer is sleeved in pressure pipeline outer, and cavity is formed between it and pressure pipeline, the thermal insulation cotton layer is wrapped in sheet iron layer.This utility model uses thin sheet iron to make sheet iron sleeve, on the one hand, sheet iron itself is good conductor of heat, sleeve root and process pipeline are directly contacted, and heat can be directly conducted through sheet iron, on the other hand, sheet iron in sleeve shape makes pressure pipeline and sleeve middle form large area cavity, air can be carried out large area heat radiation, heat convection etc. in the cavity Heat cycle means can guarantee constant temperature effect.

Description

Technical Field

[0001] This utility model belongs to the field of self-heating corrosion protection and heat preservation for instruments with easily condensable media, and specifically relates to an instrument self-heating corrosion protection and heat preservation device. Background Technology

[0002] Currently, some outdoor instruments require measurement via pressure tapping lines introduced from process medium pipelines, directly contacting the medium. The diameter of these pressure tapping lines is no more than 2 cm, and the medium temperature is low and prone to condensation. For various reasons, these pressure tapping lines need to use self-heating methods to maintain their own temperature. However, due to the thinness of the pipelines and the poor heat conduction effect caused by the construction method of the pressure tapping lines, conventional insulation methods cannot guarantee the constant temperature effect of the entire pressure tapping line. Commonly problematic media include various types of water, diesel, heavy oil, and residual oil. These media generally have low temperatures and, for various reasons, cannot be heated with steam. Conventional insulation measures cannot guarantee that the media will not condense under extreme winter temperatures.

[0003] Publication No. CN104078083B discloses a self-heating instrument insulation device, including a heat transfer module and an insulation module. The heat transfer module includes a heat pipe and a thermal conductivity regulator. The thermal conductivity regulator is in contact with a heat source and tightly wraps around the heat pipe. The insulation module is an insulation box, and the heat pipe extends into the inner side of the insulation box. The heat source is a pipe or equipment located in or near the instrument's measurement location. The device utilizes the heat conduction principle of the heat pipe and the heat generated by the operating pipes and equipment for self-heating of the instrument.

[0004] Currently, the common method for corrosion protection and insulation of self-heating systems is to directly wrap the pressure-sensing pipeline with insulation cotton, and then wrap a layer of aluminum foil on the outside of the insulation cotton. However, this method has the drawback of low thermal conductivity in practical applications, and the reasons for this are as follows:

[0005] 1. Small heat source area: Due to the thinness of the pressure-inducing pipeline, after the entire pipeline is directly wrapped with insulation cotton, the actual heat source area of ​​the process medium pipeline is about 4-16 square centimeters. The length of the pressure-inducing pipeline is generally more than 0.5 meters. The heat has already dissipated during the heat transfer process.

[0006] 2. Small heat conduction cavity: Because the pressure-inducing pipeline is thin, after it is completely wrapped with insulation cotton, the heat conduction cavity is equal to the cross-sectional area of ​​the pressure-inducing pipeline. Although the pressure-inducing pipeline is generally made of steel, which has good thermal conductivity, the medium in the pressure-inducing pipeline does not flow, and the heat transfer can only rely on the thermal conductivity of the pressure-inducing pipeline itself, resulting in low heat transfer efficiency.

[0007] Limited heat conduction method: Since the pressure-pressing pipelines are all directly wrapped with insulation cotton, the heat conduction method relies entirely on the heat transfer of the steel pressure-pressing pipelines themselves, which is a limited heat conduction method. Utility Model Content

[0008] To overcome the problems of small heat source area, small heat conduction cavity, and limited heat conduction methods in existing devices, this invention provides a self-heating, corrosion-resistant, and heat-insulating instrument. This invention uses thin sheet metal to create a straight cylindrical sleeve structure based on the diameter of the heat source area, forming a sheet metal sleeve. This sleeve is then connected to the process pipeline using screws and other fixing methods. Insulation cotton is wrapped around the outside of the sheet metal sleeve, and finally, aluminum foil is wrapped around the insulation cotton to ensure corrosion protection. This ensures that the heat conduction cavity inside the sheet metal sleeve is large enough and that the sleeve-shaped sheet metal sleeve has good support. Using thin sheet metal for the sleeve is advantageous because, firstly, sheet metal itself is a good conductor of heat, and the base of the sleeve is in direct contact with the process pipeline, allowing for direct heat conduction. Secondly, the sleeve-shaped sheet metal creates a large cavity between the pressure-sensing pipeline and the sleeve, allowing air to circulate through large-area thermal radiation and convection within this cavity, ensuring a constant temperature effect.

[0009] The technical solution provided by this utility model is as follows:

[0010] A self-heating and corrosion-resistant insulation device for instruments includes a process pipeline, a pressure-sensing pipeline, a sheet metal layer, and an insulation cotton layer. The process pipeline is connected to the pressure-sensing pipeline. The sheet metal layer is sleeved outside the pressure-sensing pipeline and forms a cavity between the sheet metal layer and the pressure-sensing pipeline. The insulation cotton layer is wrapped around the sheet metal layer.

[0011] The sheet metal layer is a sheet metal sleeve with one open end, and the open end of the sheet metal sleeve is connected to the end of the process pipeline; the inner wall of the closed end of the sheet metal sleeve is in contact with the end of the pressure-sensing pipeline.

[0012] The open end of the sheet metal sleeve is fixedly connected to the end of the process pipeline by iron wire.

[0013] The inner diameter of the sheet metal sleeve is 20-50cm.

[0014] The wall thickness of the sheet metal sleeve is 0.5-2mm.

[0015] The length of the pressure-sensing pipeline shall not exceed 2m.

[0016] An instrument is installed at the closed end of the sheet metal layer, and the instrument is connected to the pressure line.

[0017] The insulation cotton layer is wrapped with aluminum foil.

[0018] The instrument mentioned is a transmitter.

[0019] The beneficial effects of this utility model are as follows:

[0020] The sheet metal layer provided by this utility model is a sheet metal sleeve made of thin sheet metal. On the one hand, sheet metal itself is a good conductor of heat. The root of the sleeve is in direct contact with the process pipeline, and heat can be directly conducted through the sheet metal. On the other hand, the supporting structure of the sheet metal forms a large-area cavity between the pressure-injecting pipeline and the sleeve. Air can undergo large-area heat radiation, heat convection and other heat circulation methods in this cavity, which can ensure constant temperature and good temperature control effect.

[0021] Compared with direct electric heating, steam heating and other methods, this utility model ensures that the medium will not burn or explode due to excessive temperature or leakage, and also ensures that the medium will not vaporize due to excessive temperature, thus affecting the instrument measurement.

[0022] The following will provide further explanation in conjunction with the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the horizontal structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the longitudinal structure of this utility model.

[0025] In the figure, the attached reference numerals are:

[0026] 1. Process pipelines; 2. Pressure pipelines; 3. Sheet metal layer; 4. Insulation layer; 5. Instruments. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] The accompanying drawings show various structural schematic diagrams according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged and may have been omitted for clarity. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0029] Example 1:

[0030] To overcome the problems of small heat source area, small heat conduction cavity, and limited heat conduction methods in existing systems, this utility model provides the following... Figure 1 and Figure 2 The invention describes a self-heating and corrosion-resistant insulation device for instruments. This device uses thin sheet metal to create a straight cylindrical sleeve structure based on the diameter of the heat source area, forming a sheet metal sleeve. This sleeve is then connected to the process pipeline using screws and other fixing methods. Insulation cotton is wrapped around the outside of the sheet metal sleeve, and finally, aluminum foil is wrapped around the insulation cotton to ensure corrosion protection. This design ensures a sufficiently large heat-conducting cavity inside the sheet metal sleeve and good support for the sleeve shape. Using thin sheet metal for the sleeve is advantageous because sheet metal itself is a good conductor of heat, and the base of the sleeve is in direct contact with the process pipeline, allowing for direct heat conduction. Furthermore, the sleeve shape creates a large cavity between the pressure-sensing pipeline and the sleeve, allowing air to circulate through large-area thermal radiation and convection, thus ensuring a constant temperature.

[0031] A self-heating and corrosion-resistant insulation device for instruments includes a process pipeline 1, a pressure-injecting pipeline 2, a sheet metal layer 3, and an insulation cotton layer 4. The process pipeline 1 is connected to the pressure-injecting pipeline 2. The sheet metal layer 3 is sleeved on the outside of the pressure-injecting pipeline 2 and forms a cavity between it and the pressure-injecting pipeline 2. The insulation cotton layer 4 is wrapped around the sheet metal layer 3.

[0032] like Figure 1 and Figure 2 As shown, in this utility model, a straight cylindrical sleeve structure is made using thin sheet metal according to the diameter of the heat source area, forming a sheet metal sleeve. It is then connected to the process pipeline 1 using screws and other fixing methods. The sheet metal sleeve is then wrapped with insulation cotton, and finally, aluminum foil is wrapped around the insulation cotton to ensure corrosion protection. This ensures that the heat-conducting cavity inside the sheet metal sleeve is large enough and that the sleeve-shaped sheet metal sleeve has good support. Using thin sheet metal to make the sheet metal sleeve has two advantages: firstly, sheet metal itself is a good conductor of heat, and the root of the sleeve is in direct contact with the process pipeline 1, allowing heat to be directly conducted through the sheet metal; secondly, the sleeve-shaped sheet metal forms a large-area cavity between the pressure-injecting pipeline 2 and the sheet metal sleeve, allowing air to undergo large-area heat radiation, heat convection, and other heat circulation methods within this cavity. The above-mentioned multiple composite heat conduction methods can ensure a constant temperature effect.

[0033] Compared to direct electric heating, steam heating, and existing insulation methods, this invention ensures high safety by preventing the medium from burning or exploding due to excessive temperature or leakage. Furthermore, it prevents the medium from vaporizing due to excessive temperature, thus ensuring good stability and preventing the medium from affecting the measurement of instrument 5. The device provided by this invention features a large heat source area, a sufficiently large and adjustable heat conduction cavity, and multiple composite heat conduction methods to guarantee excellent temperature control. Especially in situations where it is impossible to modify the pressure line 2 during operation, this invention offers considerable flexibility and applicability, ensuring stable operation of instrument 5 without requiring changes to the process pipeline 1 or instrument 5 itself.

[0034] Example 2:

[0035] Based on Embodiment 1, in this embodiment, preferably, the sheet metal layer 3 is a sheet metal sleeve with one open end, and the open end of the sheet metal sleeve is connected to the end of the process pipeline 1; the inner wall of the closed end of the sheet metal sleeve is in contact with the end of the pressure-sensing pipeline 2.

[0036] Preferably, the open end of the sheet metal sleeve is fixedly connected to the end of the process pipeline 1 by a wire.

[0037] Preferably, the inner diameter of the sheet metal sleeve is 20-50cm.

[0038] Preferably, the wall thickness of the sheet metal sleeve is 0.5-2mm.

[0039] In this invention, a thin sheet metal with a thickness of 0.5-2mm is used to manufacture the sheet metal sleeve, and the sleeve-shaped sheet metal layer 3 itself has supporting properties. One end of the sheet metal layer 3 is fixed to the process pipeline 1, and then the pressure tapping pipeline 2 leading out from the process pipeline 1 is sealed and wrapped. Since the outer diameter of the pressure tapping pipeline 2 is much smaller than the inner diameter of the sheet metal sleeve, the large-area cavity formed between the sheet metal sleeve and the pressure tapping pipeline 2 serves as a heat conduction cavity.

[0040] In this invention, the inner diameter of the sheet metal sleeve is 20-50cm to ensure a large-area cavity is formed with the pressure-sensing pipeline 2. The preferred inner diameter of the sheet metal sleeve is 25cm, 30cm, 35cm, 40cm, or 45cm. The preferred wall thickness of the sheet metal sleeve is 0.5mm, 1mm, 1.5mm, or 2mm.

[0041] Preferably, the length of the pressure-feeding pipeline 2 does not exceed 2m.

[0042] In this invention, the length of the pressure-inducing pipeline 2 should not be too long. If it is too long, the self-support of the sheet metal sleeve cannot be guaranteed, and there is a risk of the sheet metal sleeve collapsing.

[0043] Preferably, an instrument 5 is provided at the closed end of the sheet metal layer 3, and the instrument 5 is connected to the pressure line 2.

[0044] This device ensures that instrument 5 will not malfunction due to condensation of the medium under extreme winter temperatures, thus preventing disruption of process observation data. In this invention, instrument 5 can be a transmitter or other measuring instrument.

[0045] In this invention, the instrument 5 is used to detect the medium in the pressure tapping pipeline 2.

[0046] Preferably, the insulation cotton layer 4 is wrapped with aluminum foil.

[0047] This invention incorporates aluminum foil wrapping around the insulation layer 4 to ensure corrosion protection.

[0048] This invention determines the size of the sheet metal sleeve based on actual conditions, thereby increasing the heat source area and solving the problem of small heat source area.

[0049] In this invention, the process pipeline 1 is typically insulated by wrapping it with insulating cotton and then covering it with a thin sheet of iron (0.5-2mm thick). The pressure-conducting pipeline 2 is fitted with a sheet of iron sleeve. The thin sheet of iron used in the sleeve has good rigidity. After selecting the heat source area, a straight cylindrical sheet of iron sleeve is made according to the diameter of the heat source area. One end of the sheet of iron sleeve is connected to the process pipeline 1 using screws, wires, and other fixing methods. Then, insulating cotton is wrapped around the sheet of iron sleeve, and finally, aluminum foil is wrapped around the insulating cotton to ensure corrosion protection. This ensures that the heat conduction cavity is large enough and the sheet of iron sleeve has good support, solving the problem of a small heat conduction cavity.

[0050] This invention uses a thin sheet metal sleeve. On the one hand, sheet metal itself is a good conductor of heat, and the open end of the sleeve is in direct contact with the process pipeline 1, allowing heat to be directly conducted through the sheet metal. On the other hand, the sheet metal sleeve itself has a supporting effect, forming a large-area cavity between the pressure-feeding pipeline 2 and the sheet metal sleeve. Air can undergo large-area heat radiation, heat convection, and other heat circulation methods within this cavity. The above-mentioned multiple composite heat conduction methods can ensure a constant temperature effect and solve the problem of a single heat conduction method.

[0051] Compared with direct electric heating and steam heating, this device ensures that the medium will not burn or explode due to excessive temperature or leakage, and also ensures that the medium will not vaporize due to excessive temperature, thus affecting the measurement of instrument 5. This device has a good temperature control effect.

[0052] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0053] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0054] The examples above are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are identical or similar to this utility model fall within the scope of protection of this utility model. Device structures and steps not described in detail in this utility model are prior art and will not be further described in this utility model.

Claims

1. A self-heating corrosion-resistant and heat-insulating device for instruments, characterized in that: It includes a process pipeline (1), a pressure-inducing pipeline (2), a sheet metal layer (3), and a thermal insulation layer (4). The process pipeline (1) is connected to the pressure-inducing pipeline (2). The sheet metal layer (3) is fitted over the pressure-inducing pipeline (2) and forms a cavity between it and the pressure-inducing pipeline (2). The thermal insulation layer (4) is wrapped around the sheet metal layer (3).

2. The instrument self-heating corrosion-resistant and heat-insulating device according to claim 1, characterized in that: The sheet metal layer (3) is a sheet metal sleeve with one open end, and the open end of the sheet metal sleeve is connected to the end of the process pipeline (1); the inner wall of the closed end of the sheet metal sleeve is in contact with the end of the pressure-inducing pipeline (2).

3. The instrument self-heating corrosion-resistant and heat-insulating device according to claim 2, characterized in that: The open end of the sheet metal sleeve is fixedly connected to the end of the process pipeline (1) by iron wire.

4. The instrument self-heating corrosion-resistant and heat-insulating device according to claim 2, characterized in that: The inner diameter of the sheet metal sleeve is 20-50cm.

5. The instrument self-heating corrosion-resistant and heat-insulating device according to claim 2, characterized in that: The wall thickness of the sheet metal sleeve is 0.5-2mm.

6. The instrument self-heating corrosion-resistant and heat-insulating device according to claim 1, characterized in that: The length of the pressure-inducing pipeline (2) shall not exceed 2m.

7. The instrument self-heating corrosion-resistant and heat-insulating device according to claim 2, characterized in that: An instrument (5) is provided at the closed end of the sheet metal layer (3), and the instrument (5) is connected to the pressure line (2).

8. The instrument self-heating corrosion-resistant and heat-insulating device according to claim 1, characterized in that: The insulation cotton layer (4) is wrapped with aluminum foil.

9. The instrument self-heating corrosion-resistant and heat-insulating device according to claim 1, characterized in that: The instrument (5) mentioned above is a transmitter.

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