Protective device for low-temperature fluid pipeline

Abstract

The utility model relates to the technical field of fluid pipeline protection structures, in particular to a low-temperature fluid pipeline protection device which comprises a pipeline body and is characterized by further comprising an outer shell, a bottom groove A, a heat conduction lining piece, a bottom groove B, a matching strip, a heat preservation cavity, a connecting groove, a bent heating wire, a linear heating wire and a clamping edge bar. Clamping side bars are arranged on the edges of the outer shells correspondingly, the edges of the outer shells of the two half pipes are connected together in a matched mode through the clamping side bars, and a joint of the two outer shells is located on the horizontal line corresponding to the middle positions of the two sides of the pipeline body; and the heat conduction lining pieces are connected to the inner surface of the outer shell in a matched mode. The pipeline protection device has the advantages that the installation mode is convenient, the heating effect is stable, the pipeline protection effect in cold weather is effectively improved, and damage to the pipeline under low-temperature clamping in winter is reduced or avoided.

Description

Technical Field

[0001] The present application relates to the technical field of fluid pipeline protection structures, and in particular to a protection device for cryogenic fluid pipelines. Background Art

[0002] In chemical production, some products in the form of volatile solvents, flammable gases, etc. need to be cooled during transportation to improve their stability during transportation. At the current stage, pipelines for such low-temperature fluids are generally equipped with certain insulation functions during transportation, and are generally installed underground to improve safety. However, in actual pipeline installation or use scenarios, such low-temperature fluid pipelines will be higher than the ground; these pipeline structures located outside the ground are prone to condensation on the surface due to their relatively low internal temperature. Especially in some northern winter weather, although the outer wall of such pipelines is wrapped with insulation structures such as insulation cotton sleeves, ice will still form, which will lead to If the temperature of the pipeline is too low or the outer wall of the pipeline is covered with a lot of ice, severe cases may cause the pipeline to freeze and crack, the internal low-temperature fluid to solidify or the flow rate to slow down, etc. In order to solve such problems, the existing operating methods will wrap electric heating tape, increase insulation layer, and bake on the outer surface of the fluid pipeline above the ground to solve the impact of ice and low temperature on the flow, so as to improve the protection performance of the pipeline; however, this temporary structure is not firmly connected, and there are certain safety risks if the installation process is carried out in winter. In addition, in the low temperature environment in winter in the north, the protection performance of this temporary structure is not obvious enough and it is prone to failure. Therefore, these problems need to be solved. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of this application is to provide a protective device for low-temperature fluid pipelines that is convenient to install, has a stable heating effect, effectively improves the protection effect of pipelines in cold weather, and reduces or avoids damage to pipelines due to low temperatures in winter.

[0004] The above application objectives of this application are achieved through the following technical solutions:

[0005] A protective device for a cryogenic fluid pipeline, comprising a pipeline body, characterized in that it also comprises: an outer shell, a bottom groove A, a heat-conducting lining sheet, a bottom groove B, a matching strip, a heat-insulating cavity, a connecting groove, a bent heating wire, a straight heating wire and a snap-on side rail, wherein the outer shell is composed of two half-tubes, and the edges of each of the outer shells are respectively provided with snap-on side rails, and the outer shell edges of the two half-tubes are connected together by the snap-on side rails, and the joint of the two outer shells is on a horizontal line corresponding to the middle position of both sides of the pipeline body, the bottom groove A is opened at the bottom of the outer shell, the heat-conducting lining sheets are respectively connected to the inner surface of the outer shell, and the inner surface of the heat-conducting lining sheet is The surface is in contact with the outer surface of the pipe body, the bottom groove B is opened on the lower surface of the bottom heat-conductive lining at the lowest end, the bottom groove B is connected with the bottom groove A, the matching strip is matched and connected in the through space between the bottom groove B and the bottom groove A, the thermal insulation cavity is equidistantly opened on the lower surface of the matching strip, the connecting grooves are respectively opened in the middle of the corresponding heat-conductive linings inside the upper and lower outer shells, and the connecting groove of the lower heat-conductive lining is a continuous S-shape, and the connecting groove of the upper heat-conductive lining is a straight line, the bent heating wire is matched and connected in the connecting groove in the middle of the lower heat-conductive lining, and the straight heating wire is matched and connected in the connecting groove in the middle of the upper heat-conductive lining.

[0006] Optionally, it also includes connecting holes, which are equidistantly opened on the snap-on side rail.

[0007] Optionally, it also includes a matching groove B, which is opened on the upper surface of the matching strip, and the lower surface of the bent heating wire passing through the bottom groove B contacts the surface of the matching groove B.

[0008] Optionally, it also includes a matching groove A, which is opened on the thermal conductive lining corresponding to the top of the bottom groove B, and the upper surface of the bent heating wire passing through the bottom groove B contacts the surface of the matching groove.

[0009] Optionally, it also includes anti-skid grooves, which are equidistantly arranged on the inner surface of the thermal conductive lining.

[0010] Optionally, it also includes temperature sensors, which are fixedly connected to the lower surface of the bottom groove A and the inner surface of the thermal conductive lining at equal distances.

[0011] Optionally, it also includes a clamp, which is respectively connected to the surface of each section of the outer shell near both ends.

[0012] The protective device for the cryogenic fluid pipeline can realize the quick connection of the existing pipeline body through the combined structure, and can heat the surface to achieve the effect of preventing the external part from freezing in the winter environment and ensuring normal internal transportation, and can achieve the advantage of quick installation;

[0013] The protective device for the low-temperature fluid pipeline realizes uniform temperature conduction to the bottom position where ice is easily generated by arranging matching strips in the bottom groove A and the bottom groove B, so that the collected water drops or generated ice cones fall off quickly, ensuring the normal use of the pipeline in winter;

[0014] Compared with the existing form of temporarily laying electric heating and deicing to ensure normal pipeline transportation, the protective device for the low-temperature fluid pipeline is easier to operate, has a convenient connection process, is highly secure after installation, shortens the construction period, and can be constructed in other seasons such as before winter. It can also be used for a long time without being dismantled after use in winter. It has good flexibility and good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall partial cross-section structure provided by the embodiment of the present application;

[0016] Figure 2 It is a schematic diagram of a partial cross-section structure of a thermally conductive lining sheet provided in an embodiment of the present application;

[0017] Figure 3 It is a schematic diagram of the bottom structure of the thermally conductive lining sheet at the lower end provided in an embodiment of the present application;

[0018] Figure 4 is a schematic diagram of the structure of the matching strip provided in an embodiment of the present application;

[0019] Figure 5 is a schematic diagram of the outer shell structure of the lower end provided in an embodiment of the present application;

[0020] Figure 6 It is a schematic diagram of the distribution state structure of the heating wires provided in the embodiment of the present application;

[0021] Figure 7 It is a schematic diagram of the overall installation structure provided in an embodiment of the present application.

[0022] Figure numerals: 1. Pipe body; 2. Outer shell; 3. Bottom groove A; 4. Heat-conducting lining; 5. Bottom groove B; 6. Matching strip; 61. Insulation cavity; 7. Connecting groove; 8. Bent heating wire; 9. Straight heating wire; 10. Snap-on side rail; 11. Matching groove B; 12. Matching groove A; 13. Connecting hole; 14. Anti-slip groove; 15. Temperature sensor; 16. Clamp. DETAILED DESCRIPTION

[0023] The present application is further described in detail below in conjunction with the accompanying drawings.

[0024] In order to more clearly understand the technical solutions presented in the embodiments of the present application, the work and principles of the existing protection of cryogenic fluid pipelines are first introduced.

[0025] Existing low-temperature fluid pipelines will cool the transported liquid to a temperature lower than normal temperature or a certain set temperature value. The exposed parts of such pipelines will be affected by the external temperature in winter weather, and ice will form in some humid environments or under the blessing of rain and snow. Moreover, due to the relatively low internal temperature, the thickness will continue to increase after freezing. In severe cases, it will not only wrap the pipeline, but also cause the pipeline to freeze and crack. In addition, the lower temperature will affect the transportation of the internal fluid. When the transported fluid is a non-organic liquid, it will also cause the internal flow to slow down or freeze. Existing solutions will wrap a thicker protective layer on the pipeline outside the ground in severe cold, and some will also heat the pipeline in the form of electric heating tape to melt the ice and rise the temperature to ensure normal fluid transportation. However, the electric heating tape is a temporary structure. On the one hand, winding a thicker protective layer will increase the cost. On the other hand, some pipeline connection positions have a small space, which is not convenient for installing the winding protective layer structure. Therefore, there are still major problems in the low-temperature protection of such pipelines in winter. Therefore, the structure of the present application is proposed to solve these problems.

[0026] See also Figures 1 to 7 , is a protective device for a cryogenic fluid pipeline disclosed in an embodiment of the present application, comprising a pipeline body 1, characterized in that it also comprises: an outer shell 2, a bottom groove A3, a heat-conducting lining sheet 4, a bottom groove B5, a matching strip 6, a heat-insulating cavity 61, a connecting groove 7, a bent heating wire 8, a straight heating wire 9 and a snap-on side rail 10, the outer shell 2 is composed of two half-tubes, and the edges of each outer shell 2 are respectively provided with a snap-on side rail 10, the edges of the outer shells 2 of the two half-tubes are connected together by the snap-on side rail 10, and the joints of the two outer shells 2 are located on the horizontal line corresponding to the middle positions of the two sides of the pipeline body 1, the bottom groove A3 is opened at the bottom of the outer shell 2, and the heat-conducting lining sheets 4 are respectively connected to the inner surface of the outer shell 2, The inner surface of the thermally conductive lining 4 is in contact with the outer surface of the pipe body 1, and the bottom groove B5 is opened on the lower surface of the bottom thermally conductive lining 4 at the lowest end. The bottom groove B5 is connected to the bottom groove A3, and the matching strip 6 is connected in the through space between the bottom groove B5 and the bottom groove A3. The insulation cavity 61 is equidistantly opened on the lower surface of the matching strip 6, and the connecting grooves 7 are respectively opened in the middle of the corresponding thermally conductive linings 4 inside the upper and lower outer shells 2, and the connecting groove 7 of the lower thermally conductive lining 4 is a continuous S-shape, and the connecting groove 7 of the upper thermally conductive lining 4 is a straight line. The bent heating wire 8 is connected in the connecting groove 7 in the middle of the lower thermally conductive lining 4, and the straight heating wire 9 is connected in the connecting groove 7 in the middle of the upper thermally conductive lining 4.

[0027] Specifically, the outer shell 2 can form a tubular covering structure that wraps the pipeline body 1 through the clamping side rails 10 on both sides. The heat-conducting lining sheet 4 arranged inside is preferably made of rubber and plastic insulation materials. While having insulation performance, it also has a certain thermal conductivity performance, which is convenient for evenly distributing the generated heat. The bottom groove A3 and the bottom groove B5 can form a cavity structure at the bottom, and the matching strip 6 with better thermal conductivity is installed in the cavity. The material of the matching strip 6 can be selected from graphite-modified XPS materials or metals and other materials with good thermal conductivity. Its function is to quickly and evenly transfer the temperature at the bottom. Since the bottom is more prone to dew accumulation and ice cone accumulation than the top, the rapid heat conduction of the matching strip 6 can accelerate the heating of such parts, achieve a rapid deicing effect, and remove the influence of external factors on the pipeline body 1. The set insulation cavity 61 can also make a certain gap structure at the bottom of the matching strip 6 to ensure that there is a certain amount of gas inside, which is convenient for further improving the temperature uniformity when heating up, compared with the contact-type local deicing. The peripheral heating method helps to ensure the stability of the overall heating during use. At the same time, the setting of the insulation cavity 61 can also create a certain buffer space for the expansion of the matching strip 6 or the expansion of other components during heating, ensuring that the external outer shell 2 will not be damaged, and also help to extend the service life. The S-shaped connecting groove 7 structure is set at the bottom, which can increase the heating area distributed at the bottom, so that the installed bent heating wire 8 is longer, which meets the problem that the low-temperature fluid inside some pipelines does not fill the entire pipeline in actual use, so the temperature at the lower end is lower and it is easier to freeze. The upper end is set because it will not produce a large amount of ice cones, dew, etc., so a ring-shaped arrangement of several straight heating wires 9 can meet the actual needs. Compared with the existing repeated wrapping, temporary heating and other forms, this structure has a simpler installation process and good convenience. It can reduce and reduce the occurrence of ice damage to low-temperature fluid pipelines in the cold season in winter, effectively solving the protection and transportation problems of such pipelines in winter. It has good stability and high safety during use, and has good practicality and application prospects.

[0028] See also Figure 1 , Figure 5 and Figure 7 As another specific embodiment provided by the application, it also includes connecting holes 13, which are equidistantly opened on the snap-on side rail 10.

[0029] Specifically, the provided connection holes 13 can be used for reinforcing the side rail 10 after being clamped, and the connection holes 13 are connected with fastening nuts to achieve firmness after installation.

[0030] See also Figure 4As another specific embodiment provided by the application, it also includes a matching groove B11, which is opened on the upper surface of the matching strip 6, and the lower surface of the bent heating wire 8 passing through the bottom groove B5 contacts the surface of the matching groove B11.

[0031] Specifically, the arrangement of the matching groove B11 enables the surface of the bent heating wire 8 at the lower end to contact it, thereby allowing the temperature to be quickly transferred to the matching strip 6 .

[0032] See also Figure 3 As another specific embodiment provided by the application, it also includes a matching groove A12, which is opened on the thermal conductive lining sheet 4 corresponding to the top of the bottom groove B5, and the upper surface of the bent heating wire 8 passing through the bottom groove B5 contacts with the surface of the matching groove A12.

[0033] Specifically, the arrangement of the matching groove A12 enables the bent heating wire 8 to pass through and limits its position, which facilitates the alignment of the upper and lower positions during installation, so that the heat generated by the bent heating wire 8 can be stably transferred upward.

[0034] See also Figure 2 As another specific embodiment provided by the application, it also includes anti-skid grooves 14, which are equidistantly arranged on the inner surface of the thermal conductive lining sheet 4.

[0035] Specifically, the provision of the anti-skid groove 14 can enhance the friction between the thermally conductive lining sheet 4 and the pipe body 1 after installation, thereby preventing the thermally conductive lining sheet 4 from sliding after installation.

[0036] See also Figure 2 and Figure 5 As another specific embodiment provided by the application, it also includes a temperature sensor 15, which is fixedly connected to the lower surface of the bottom groove A3 and the inner surface of the thermal conductive lining 4 at equal distances.

[0037] Specifically, the setting of the temperature sensor 15 can obtain the temperature of the side of the internal heat-conducting lining 4 facing the pipe body 1, and at the same time obtain the temperature reaching the external bottom groove A3, so as to obtain the temperatures of the inner and outer layers. In terms of the type of the temperature sensor 15, a remote communication sensor with a wireless transmission function can be selected, or a sensor type that requires wiring can be selected to enhance the flexible control of the temperature, avoid pipeline damage while ensuring normal transportation, and enhance the flexibility of control.

[0038] See also Figure 7 As another specific embodiment provided by the application, it also includes a clamp 16, which is respectively connected to the surface of each section of the outer shell 2 near both ends.

[0039] Specifically, the arrangement of the clamp 16 can reinforce the outer shell 2 again, thereby improving its stability after installation and ensuring long-term stable connection under some subsequent working conditions without removal.

[0040] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A protective device for a cryogenic fluid pipeline, comprising a pipeline body (1), characterized in that: Also includes: An outer shell (2), a bottom groove A (3), a heat-conducting inner lining (4), a bottom groove B (5), a matching strip (6), a heat-insulating cavity (61), a connecting groove (7), a bent heating wire (8), a straight heating wire (9) and a snap-fitting side rail (10), wherein the outer shell (2) is composed of two half-tubes, and the edges of the outer shells (2) of the two half-tubes are respectively provided with snap-fitting side rails (10), and the edges of the outer shells (2) of the two half-tubes are matched and connected together by the snap-fitting side rails (10), and the joint of the two outer shells (2) is located on a horizontal line corresponding to the middle position of both sides of the pipeline body (1), the bottom groove A (3) is opened at the bottom of the outer shell (2), the heat-conducting inner lining (4) is respectively matched and connected to the inner surface of the outer shell (2), and the inner surface of the heat-conducting inner lining (4) is in contact with the outer surface of the pipeline body (1). The bottom groove B (5) is formed on the lower surface of the bottom heat-conducting lining sheet (4) at the lowest end, the bottom groove B (5) is connected to the bottom groove A (3), the matching strip (6) is matched and connected in the through space between the bottom groove B (5) and the bottom groove A (3), the heat-insulating cavity (61) is equidistantly formed on the lower surface of the matching strip (6), the connecting grooves (7) are respectively formed in the middle of the corresponding heat-conducting lining sheets (4) inside the upper and lower outer shells (2), and the connecting groove (7) of the lower heat-conducting lining sheet (4) is in a continuous S shape, and the connecting groove (7) of the upper heat-conducting lining sheet (4) is in a straight line shape, the bent heating wire (8) is matched and connected in the connecting groove (7) in the middle of the lower heat-conducting lining sheet (4), and the straight heating wire (9) is matched and connected in the connecting groove (7) in the middle of the upper heat-conducting lining sheet (4).

2. A cryogenic fluid pipeline protection device according to claim 1, characterized in that: It also comprises connection holes (13), wherein the connection holes (13) are equidistantly arranged through the clamping side rail (10).

3. A cryogenic fluid pipeline protection device according to claim 1, characterized in that: It also includes a matching groove B (11), wherein the matching groove B (11) is opened on the upper surface of the matching strip (6), and the lower surface of the bent heating wire (8) passing through the bottom groove B (5) contacts the surface of the matching groove B (11).

4. A protection device for a cryogenic fluid pipeline according to claim 1, characterized in that: It also includes a matching groove A (12), wherein the matching groove A (12) is opened on the heat-conducting lining sheet (4) corresponding to the top of the bottom groove B (5), and the upper surface of the bent heating wire (8) passing through the bottom groove B (5) contacts the surface of the matching groove A (12).

5. The protective device for a cryogenic fluid pipeline according to claim 1, characterized in that: It also comprises anti-skid grooves (14), wherein the anti-skid grooves (14) are arranged at equal intervals on the inner surface of the heat-conducting lining sheet (4).

6. A protection device for a cryogenic fluid pipeline according to claim 1, characterized in that: It also includes temperature sensors (15), the temperature sensors (15) being fixedly connected to the lower surface of the bottom groove A (3) and the inner surface of the heat-conducting lining sheet (4) at equal distances.

7. A cryogenic fluid pipeline protection device according to claim 1, characterized in that: It also comprises a clamp (16), wherein the clamp (16) is respectively connected to the surface of each section of the outer shell (2) close to both ends.

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