Pipeline heat tracing device

Abstract

The utility model relates to a pipeline heat tracing device, and relates to the technical field of petrochemical engineering. The pipeline heat tracing device comprises heat tracing pipes and a connecting bent pipe, steam is introduced into the heat tracing pipes and the connecting bent pipe, the heat tracing pipes are attached to the outer wall of a main pipeline, the connecting bent pipe comprises a first pipeline, a first flange, a second pipeline and a second flange, one end of the first pipeline is connected with one heat tracing pipe, and the other end of the first pipeline is connected with the other heat tracing pipe. The first flange is arranged at the other end of the first pipeline, one end of the second pipeline is connected with the other tracing pipe, the other end of the second pipeline is connected with the second flange, and the first flange and the second flange are detachably connected. The heat tracing pipe and the connecting bent pipe are both installed outside the main pipeline, the installation process is simple and convenient, and the difficulty is low. By arranging the connecting bent pipe, the connecting bent pipe can bypass a flange plate at the joint of the two main pipelines, so that steam can be transferred from one heat tracing pipe to the other heat tracing pipe. Once steam leaks, a specific steam leakage point can be directly observed, and maintenance work can be conveniently carried out.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of petroleum chemical industry, in particular to a pipeline heat tracing device. BACKGROUND

[0002] Pipeline transportation is the main transportation mode of the petroleum chemical industry, and the pipe material of the pipeline is generally steel pipe, which is welded into a long-distance pipeline using flanges and other connecting devices. In winter, ice blockage may occur in the pipeline, and even the pipeline may be frozen, resulting in leakage of crude oil or natural gas. In addition, as the process medium flows in the process pipeline, a certain amount of heat loss will inevitably occur, resulting in a decrease in temperature. Some process media have strict requirements on temperature, and the heat loss of the medium in the pipeline needs to be compensated from the outside to maintain the temperature of the transported medium. Therefore, a pipeline heat tracing device is usually used to generate heat to avoid the above problems.

[0003] A heat tracing petroleum pipeline is disclosed in Chinese Patent No. CN106439363A, which forms a semicircular gap at the bottom of the outer side of the inner steel pipe conveying petroleum, and hot water is passed through the gap to warm the petroleum. However, the above-mentioned heat tracing petroleum pipeline has a large volume, is inconvenient to install, is not easy to detect when hot water leaks, and is difficult to repair. SUMMARY

[0004] The utility model provides a pipeline heat tracing device, which is simple to install, easy to detect when leakage occurs, and convenient to repair.

[0005] The utility model provides a pipeline heat tracing device, which comprises a heat tracing pipe and a connecting elbow pipe, steam is passed through the heat tracing pipe and the connecting elbow pipe, the heat tracing pipe is attached to the outer wall of the main pipeline, the connecting elbow pipe comprises a first pipeline, a first flange, a second pipeline and a second flange, one end of the first pipeline is connected to one of the heat tracing pipes, the first flange is arranged at the other end of the first pipeline, one end of the second pipeline is connected to the other heat tracing pipe, the other end of the second pipeline is connected to the second flange, and the first flange and the second flange are detachably connected.

[0006] In one embodiment, the first pipeline comprises a first segment, a second segment and a third segment, the second segment is connected to the first segment and the third segment at both ends, one end of the first segment away from the second segment is connected to one of the heat tracing pipes, and one end of the third segment away from the second segment is connected to the first flange.

[0007] In one embodiment, the first segment and the third segment are parallel to each other and are both connected perpendicularly to the second segment.

[0008] In one embodiment, the length of the second pipeline is less than the length of the third segment.

[0009] In one embodiment, the side of the heat tracing pipe connected with the main pipeline is provided with an arc-shaped groove.

[0010] In one embodiment, a heat-conducting cement is arranged between the heat tracing pipe and the main pipeline.

[0011] In one embodiment, at least two heat tracing pipes are arranged on the same main pipeline.

[0012] In one embodiment, four heat tracing pipes are arranged on the same main pipeline, and the four heat tracing pipes are arranged on the outer wall of the main pipeline in parallel and at equal intervals.

[0013] In one embodiment, the heat tracing pipe is bundled on the main pipeline by a cable tie.

[0014] In one embodiment, the surface of the heat tracing pipe is provided with a positioning groove, and the cable tie is arranged in the positioning groove.

[0015] Compared with the prior art, the heat tracing pipe and the connecting elbow are both installed on the outside of the main pipeline, and the installation process is simple and low in difficulty. By arranging the connecting elbow, the flange plate at the connection between two main pipelines can be bypassed, so that steam can be transmitted from one heat tracing pipe to another heat tracing pipe, thereby realizing continuous circulation of steam. Once steam leakage occurs, the specific steam leakage point can be directly observed, and the installation mode arranged on the outside of the main pipeline is also convenient for maintenance work. BRIEF DESCRIPTION OF DRAWINGS

[0016] Hereinafter, the utility model will be described in more detail based on the embodiments and with reference to the drawings.

[0017] Figure 1 is the structure schematic view of the pipeline heat tracing device after installation of the main pipeline in the embodiment of the utility model;

[0018] Figure 2 is the cross-sectional structure view of the heat tracing pipe and the main pipeline in the embodiment of the utility model.

[0019] Reference signs:

[0020] 1, heat tracing pipe; 11, arc-shaped groove; 12, positioning groove; 2, connecting elbow; 21, first pipeline; 211, first section; 212, second section; 213, third section; 22, first flange; 23, second pipeline; 24, second flange; 3, main pipeline; 4, flange plate; 5, cable tie. DETAILED DESCRIPTION

[0021] The utility model will be further described below with reference to the drawings.

[0022] As Figure 1 shown, the pipeline heat tracing device of the embodiment of the utility model includes heat tracing pipe 1 and connecting elbow 2, steam is led into heat tracing pipe 1 and connecting elbow 2, heat tracing pipe 1 is attached to the outer wall of main pipeline 3, connecting elbow 2 includes first pipeline 21, first flange 22, second pipeline 23 and second flange 24, one end of first pipeline 21 is connected with one heat tracing pipe 1, first flange 22 is arranged at the other end of first pipeline 21, one end of second pipeline 23 is connected with another heat tracing pipe 1, the other end of second pipeline 23 is connected with second flange 24, first flange 22 and second flange 24 are detachably connected.

[0023] The steam in heat tracing pipe 1 can keep heat tracing pipe 1 at a high temperature, heat tracing pipe 1 can transfer the temperature to main pipeline 3, thereby heating main pipeline 3, so that the medium transported in main pipeline 3 is not too low in temperature. Heat tracing pipe 1 and connecting elbow 2 are both installed outside main pipeline 3, and the installation process is simple and low in difficulty. By arranging connecting elbow 2, the flange plate 4 at the connection of two sections of main pipeline 3 can be bypassed, so that steam can be transferred from one heat tracing pipe 1 to another heat tracing pipe 1, realizing continuous circulation of steam. Once steam leakage occurs, the specific steam leakage point can be directly observed, and the installation mode arranged outside main pipeline 3 is also convenient for maintenance work.

[0024] Specifically, first pipeline 21 includes first subsection 211, second subsection 212 and third subsection 213, the two ends of second subsection 212 are connected with first subsection 211 and third subsection 213 respectively, one end of first subsection 211 away from second subsection 212 is connected with one heat tracing pipe 1, and one end of third subsection 213 away from second subsection 212 is connected with first flange 22. The first pipeline 21 in this form can well bypass the flange plate 4, so that the flange plate 4 does not interrupt the delivery of steam.

[0025] In this embodiment, the first subsection 211 and the heat tracing pipe 1 are connected by welding, and the second pipeline 23 and the heat tracing pipe 1 are also connected by welding. When installing the pipeline heat tracing device, the positions of the heat tracing pipes 1 on both sides of the flange plate 4 need to be adjusted first, so that the two heat tracing pipes 1 are arranged opposite to each other, the first flange 22 and the second flange 24 are aligned with each other, then the heat tracing pipes 1 are preliminarily positioned, and after the first flange 22 and the second flange 24 are connected, the heat tracing pipes 1 on both sides of the flange plate 4 are fixed firmly.

[0026] Further, the first subsection 211 and the third subsection 213 are parallel to each other and are both perpendicularly connected with the second subsection 212. The two bends on the first pipeline 21 are both 90 degrees, so that the first pipeline 21 is convenient to manufacture, and it is also conducive to the alignment and connection of the first flange 22 and the second flange 24.

[0027] In the embodiment, the length of the second pipe 23 is less than the length of the third section 213. By setting the second pipe 23 to be shorter, the second pipe 23 is less likely to bend, and the stability of the first flange 22 and the second flange 24 can be improved. After the first flange 22 and the second flange 24 are connected, the first flange 22 and the second flange 24 are less likely to shake greatly.

[0028] As shown in Figure 2 the embodiment, the side of the heat tracing pipe 1 connected with the main pipe 3 is provided with an arc-shaped groove 11, so that the heat tracing pipe 1 can be better attached to the outer wall of the main pipe 3. On the one hand, the heat conduction effect is improved, and on the other hand, the connection of the heat tracing pipe 1 and the main pipe 3 is facilitated.

[0029] In a specific embodiment, heat-conducting cement (not shown in the figure) is arranged between the heat tracing pipe 1 and the main pipe 3. By arranging the heat-conducting cement, the gap between the heat tracing pipe 1 and the main pipe 3 can be filled, so that the air between the heat tracing pipe 1 and the main pipe 3 does not hinder the heat conduction, thereby improving the heat conduction effect.

[0030] As shown in Figure 1 the embodiment, two heat tracing pipes 1 are arranged on the same main pipe 3, and the two heat tracing pipes 1 are arranged at an interval of 180 degrees on the outer wall of the main pipe 3.

[0031] In another embodiment, four heat tracing pipes 1 are arranged on the same main pipe 3, and the four heat tracing pipes 1 are arranged in parallel and at equal intervals on the outer wall of the main pipe 3.

[0032] By arranging two or more heat tracing pipes 1, the area of heat conduction can be improved, thereby increasing the effect of heat conduction. The number of heat tracing pipes 1 to be installed is determined according to the difference between the temperature requirement of the medium in the main pipe 3 and the current environmental temperature. On the premise of meeting the temperature requirement, a smaller number of heat tracing pipes 1 is used to reduce energy consumption.

[0033] As shown in Figure 1 the embodiment, the heat tracing pipe 1 is bundled on the main pipe 3 by a cable tie 5. The heat tracing pipe 1 is bundled and fixed by the cable tie 5. When the heat tracing pipe 1 needs to be disassembled, the cable tie 5 only needs to be removed, and the operation is very simple.

[0034] As shown in Figure 1 the embodiment, the heat tracing pipe 1 is provided with a positioning groove 12, and the cable tie 5 is arranged in the positioning groove 12. The positioning groove 12 is arranged on the side of the heat tracing pipe 1 away from the main pipe 3. After the cable tie 5 is bundled, the positioning groove 12 makes the cable tie 5 less likely to displace, and the position of the cable tie 5 can remain unchanged, thereby providing reliable bundling effect, and the heat tracing pipe 1 is also less likely to displace on the surface of the main pipe 3.

[0035] Although the utility model has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the utility model and equivalent replacements can be made to the components therein. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pipe tracing apparatus, characterized by, The application relates to a heat tracing pipe and a connecting elbow, wherein steam is introduced into the heat tracing pipe and the connecting elbow, the heat tracing pipe is attached to the outer wall of a main pipe, the connecting elbow comprises a first pipe, a first flange, a second pipe and a second flange, one end of the first pipe is connected to one of the heat tracing pipes, the first flange is arranged at the other end of the first pipe, one end of the second pipe is connected to the other heat tracing pipe, the other end of the second pipe is connected to the second flange, and the first flange and the second flange are detachably connected.

2. The pipe heat tracing apparatus of claim 1, wherein, The first pipe comprises a first section, a second section and a third section, the two ends of the second section are connected to the first section and the third section respectively, one end of the first section away from the second section is connected to one of the heat tracing pipes, and one end of the third section away from the second section is connected to the first flange.

3. The pipe heat tracing apparatus of claim 2, wherein, The first section and the third section are parallel to each other and are perpendicularly connected to the second section.

4. The pipe heat tracing apparatus of claim 3, wherein, The length of the second pipe is smaller than the length of the third section.

5. The pipe heat tracing apparatus of claim 1, wherein, The side of the heat tracing pipe connected to the main pipe is provided with an arc-shaped groove.

6. The pipe heat tracing apparatus of claim 5, wherein, Thermal cement is arranged between the heat tracing pipe and the main pipe.

7. The pipe heat tracing apparatus of claim 1, wherein, At least two heat tracing pipes are arranged on the same main pipe.

8. The pipe heat tracing apparatus of claim 7, wherein, Four heat tracing pipes are arranged on the same main pipe, the four heat tracing pipes are parallel to each other and are arranged on the outer wall of the main pipe at equal intervals.

9. The pipe heat tracing apparatus of claim 7, wherein, The heat tracing pipes are bundled on the main pipe by a strap.

10. The pipe heat tracing apparatus of claim 9, wherein, The surface of the heat tracing pipe is provided with a positioning groove, and the strap is arranged in the positioning groove.

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