Gas pipeline jacket structure and working method

Abstract

The invention relates to the technical field of power plant gas pipeline jacket installation, in particular to a gas pipeline jacket structure and a working method. The first gas inner pipe and the second gas inner pipe are welded together, the first heat tracing jacketed pipe is arranged outside the first gas inner pipe, and the second heat tracing jacketed pipe is arranged outside the second gas inner pipe. And a jumper pipe is arranged between the tail of the first heat tracing jacketed pipe and the head of the second heat tracing jacketed pipe in a communicating mode, a steam inlet is further formed in the first heat tracing jacketed pipe, and by adjusting the positioning plate, steam can flow into a next pipeline from the jumper pipe more efficiently.

Description

Technical Field

[0001] The invention relates to the technical field of gas pipeline jacket installation in power plants, and in particular to a gas pipeline jacket structure and a working method. Background Art

[0002] The gas pipe jacket is an insulated pipe used to maintain the temperature of the fluid. It is widely used in various fields. It forms a sandwich between the inner pipe and the outer pipe. Steam or other heat media are passed into the sandwich to achieve heating or insulation of the fluid in the inner pipe, which can effectively prevent condensation and solidification of the fluid during transportation. The characteristics of the jacket pipe are uniform heating, high efficiency, rapid temperature adjustment, and wide adaptability.

[0003] In the design of jacketed pipes, jackets are usually not set at tees, elbows and other pipe fittings. Instead, jumper pipes are used to connect them to simplify the structure and avoid complex flow resistance. The jumper pipe allows steam or heat medium to flow around the pipe fittings to maintain the heating effect of the entire system. In addition, a positioning plate is set in the jacket pipe to keep the inner pipe in a fixed position in the jacket to prevent displacement caused by thermal expansion or pressure changes.

[0004] Normally, workers will perform sealing treatment at the joints between the inner and outer pipes to prevent steam leakage. However, the flow of high-temperature steam at the joints may cause aging or damage to the sealing materials, affecting the sealing performance. It is also necessary to consider that in order to prevent steam from being retained in the pipe fittings, condensate may accumulate. The flow direction and speed of the steam need to be controlled to improve the thermal efficiency of the entire system and reduce energy loss.

[0005] Based on the above technical problems, we propose a gas pipeline jacket structure and working method. Summary of the invention

[0006] In view of the above problems, a gas pipeline jacket structure in the present invention is proposed.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a gas pipeline jacket structure, comprising: a long-distance transportation component, which respectively comprises a first gas inner tube and a second gas inner tube welded together, a first heating jacket pipe arranged outside the first gas inner tube, and a second heating jacket pipe arranged outside the second gas inner tube; and a jumper pipe is provided between the tail of the first heating jacket pipe and the head of the second heating jacket pipe, and a steam inlet is also provided on the first heating jacket pipe.

[0008] As a preferred solution of the gas pipeline jacket structure described in the present invention, the ends of the first heating jacket pipe and the second heating jacket pipe are provided with ellipsoidal pipe caps, and the first heating jacket pipe and the first gas inner pipe, the second heating jacket pipe and the second gas inner pipe are sealed and connected by the ellipsoidal pipe caps.

[0009] As a preferred solution of the gas pipeline jacket structure of the present invention, an anti-collision plate is provided on the outer wall of the first gas inner pipe, and the anti-collision plate is located below the steam inlet.

[0010] As a preferred solution of the air pipe jacket structure of the present invention, the outer walls of the first inner air pipe and the second inner air pipe are provided with positioning plates, and five groups of positioning plates are arranged inside the first inner air pipe, and each group of positioning plates has three positioning plates evenly spaced around the circumference.

[0011] As a preferred solution of the air pipe jacket structure described in the present invention, a group of positioning plates is arranged in the middle position of the first air tube, and the head and tail of the first air tube are each provided with two groups of spaced-apart positioning plates, and the two groups of positioning plates located at the head and tail of the first air tube are arranged alternately with each other.

[0012] As a preferred solution of the gas pipeline jacket structure described in the present invention, the positioning plates located at the head and tail of the first gas internal pipe are respectively provided with a concave surface and a convex surface along the steam flow direction, and the angles formed by the vertices of the concave surface and the convex surface and the tangent lines thereto are respectively between 10° and 30°; the two groups of positioning plates located at the head of the first gas internal pipe are arranged between the steam inlet and the ellipsoidal pipe cap close thereto, and the concave surface on the positioning plate is located on the side close to the steam inlet.

[0013] As a preferred solution of the gas pipeline jacket structure of the present invention, the inlet of the jumper tube is located between two groups of positioning plates at the tail of the first gas inner tube, and is located in the middle position staggered with the adjacent group of single positioning plates.

[0014] As a preferred solution of the gas pipeline jacket structure of the present invention, wherein: the concave surface on a group of positioning plates relatively close to the steam inlet and located adjacent to the jumper tube is closer to the jumper tube than the convex surface; the concave surface on a group of positioning plates between the jumper tube and the tail ellipsoidal pipe cap is closer to the jumper tube than the convex surface.

[0015] As a preferred solution of the gas pipeline jacket structure of the present invention, a drain outlet is provided at the tail of the second heating jacket pipe.

[0016] In view of the above problems, a working method of the gas pipeline jacket in the present invention is proposed.

[0017] In order to solve the above technical problems, the present invention provides the following technical solutions: a working method of a gas pipeline jacket, comprising a gas pipeline jacket structure, and further comprising: introducing high-temperature steam at a steam inlet, the steam enters between a first gas inner pipe and a first heating jacket pipe, so that the temperature of a medium in the first gas inner pipe is maintained; at a tee and an elbow pipe, the first heating jacket pipe and the second heating jacket pipe are connected by a jumper pipe, and the steam enters into the second heating jacket pipe, so that the temperature of the medium in the second gas inner pipe is maintained.

[0018] The beneficial effects of the present invention are as follows: long-distance transportation through gas pipelines may lead to a decrease in the temperature of the product at the tail end. By arranging a first heating jacket pipe and a second heating jacket pipe on the outside and injecting steam, the temperature is maintained. When the steam enters the middle layer, it will disperse. If it is repeatedly impacted and retained at the connection between the jacket pipe and the gas inner pipe, it will damage the sealing material and affect its long-term effective use. By arranging a positioning plate near the connection, in addition to fixing the position of the gas inner pipe, the steam circulation can also be guided. In the middle of the jumper pipe and the connection, the concave surface and the convex surface of the positioning plate cooperate to enable the steam to efficiently circulate into the jumper pipe, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0020] Figure 1 It is a schematic diagram of the overall structure of the long-distance transport component in the present invention.

[0021] Figure 2 It is a schematic diagram of the anti-collision plate connection structure in the present invention.

[0022] Figure 3 It is a schematic diagram of the distributed connection structure of each group of positioning plates in the present invention.

[0023] Figure 4 It is a cross-sectional view of the ellipsoidal pipe cap connection structure in the present invention.

[0024] Figure 5 It is a plan view schematic diagram of the positioning plate distribution in the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of a single positioning plate located at the head and tail of the present invention. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] Example 1

[0031] Reference Figure 1 to Figure 3 , which is the first embodiment of the present invention, and provides a gas pipeline jacket structure, a long-distance transportation component 100, which respectively includes a first gas inner tube 101 and a second gas inner tube 102 welded together, a first heating jacket pipe 103 arranged outside the first gas inner tube 101, and a second heating jacket pipe 104 arranged outside the second gas inner tube 102; and, a jumper pipe 105 is provided between the tail of the first heating jacket pipe 103 and the head of the second heating jacket pipe 104, and a steam inlet 106 is also provided on the first heating jacket pipe 103.

[0032] Preferably, the ends of the first heating jacket pipe 103 and the second heating jacket pipe 104 are provided with ellipsoidal pipe caps 107, and the first heating jacket pipe 103 and the first inner air pipe 101, the second heating jacket pipe 104 and the second inner air pipe 102 are sealed and connected by the ellipsoidal pipe caps 107.

[0033] Preferably, an anti-collision plate 101 a is provided on the outer wall of the first inner air pipe 101 , and the anti-collision plate 101 a is located below the steam inlet 106 .

[0034] Among them, a closed cavity is formed between the gas inner pipe and the heating jacket pipe, and then a heating medium is introduced into the cavity. In this scheme, steam is selected for heating to maintain or increase the temperature of the gas or liquid transported in the inner pipe; a section of the heating jacket pipe is set at a certain interval, and a jumper pipe is used to connect the two sections of the jacket pipe to maintain the flow of steam and the transfer of heat, ensuring uniform heat distribution.

[0035] Since the flow resistance at pipe fittings such as tees and elbows is relatively large, if a jacket is provided, the flow resistance may be further increased, affecting the flow efficiency of the steam. Therefore, steam transmission can also be carried out by providing a jumper pipe 105 to avoid these complex flow resistances while maintaining the heating effect of the entire system.

[0036] The ellipsoidal pipe caps 107 are distributed at both ends of the first heating jacket pipe 103 and the second heating jacket pipe 104. The heating jacket pipe is connected to the air inner pipe through the ellipsoidal pipe caps 107 and sealed to prevent steam leakage and affect the insulation effect.

[0037] The anti-collision plate 101a is preferably configured to be arc-shaped, welded to the outer wall of the first inner air pipe 101, and located below the steam inlet 106. Figure 2 As shown, the anti-impact plate 101a is used to reduce the direct impact of the fluid on the pipe wall, avoid vibration instability and corrosion, and ensure the stability of the pipeline system and the safety of long-term operation.

[0038] In summary, steam enters between the first heating jacket pipe 103 and the first air inner pipe 101 from the steam inlet 106 to insulate the medium transported in the first air inner pipe 101, and through the setting of the jumper pipe 105, the steam enters the second heating jacket pipe 104 to heat the second air inner pipe 102, which is suitable for long-distance transportation.

[0039] Example 2

[0040] Reference Figure 1 to Figure 6 , which is the second embodiment of the present invention, is based on the previous embodiment, and the difference is that the outer walls of the first endotracheal tube 101 and the second endotracheal tube 102 are provided with positioning plates 101b, and five groups of positioning plates 101b are arranged inside the first endotracheal tube 101, and each group of positioning plates 101b is evenly spaced around the circumference.

[0041] Preferably, a group of positioning plates 101b is provided in the middle position of the first endotracheal tube 101, and two groups of spaced-apart positioning plates 101b are provided at the head and tail of the first endotracheal tube 101, and the two groups of positioning plates 101b at the head and tail of the first endotracheal tube 101 are arranged alternately with each other.

[0042] A group of positioning plates 101b located in the middle are evenly spaced around the first endotracheal tube 101, and are specifically distributed as follows: Figure 3 As shown; the two adjacent sets of positioning plates 101b are arranged alternately by spacing, such as Figure 5 As shown, a certain flow space of steam can be given; in addition, it should be mentioned that, with reference to the steam flow direction, the head position referred to in the present invention is between the first inner air tube 101 and the first heating jacket tube 103, or between the second inner air tube 102 and the second heating jacket tube 104, and the steam flows from the beginning of the middle cavity to the end, and the starting point is the head position; similarly, the end position is the tail position.

[0043] Preferably, the positioning plates 101b located at the head and tail of the first endotracheal tube 101 are respectively provided with a concave surface M and a convex surface N along the steam flow direction, and the angles formed by the vertices of the concave surface M and the convex surface N and the tangent lines thereto are respectively between 10° and 30°; the two groups of positioning plates 101b located at the head of the first endotracheal tube 101 are arranged between the steam inlet 106 and the ellipsoidal tube cap 107 close thereto, and the concave surface M on the positioning plate 101b is located on the side close to the steam inlet 106.

[0044] By designing the positioning plates 101b at the head and tail to have a certain curvature and to be divided into a concave surface M and a convex surface N along the steam flow direction, the steam flow is effectively guided, the flow resistance is reduced, and the flow efficiency of the steam is improved, so that the steam can enter the jumper tube 105 more smoothly, ensuring the continuous flow of steam and the effective transfer of heat; through the distribution of such positioning plates 101b, it is helpful to evenly distribute the stress on the first inner air pipe 101, reduce the displacement caused by thermal expansion or pressure changes, and enhance the stability and reliability of the entire pipeline system; and it can also improve the bending resistance, thereby improving the bearing capacity of the structure.

[0045] The angle formed by the tangent line between the vertices of the concave surface M and the convex surface N is α, as shown in Figure 6 As shown, the angle ranges from 10° to 30°, so that the curvature of the positioning plate 101b is relatively gentle, which can help reduce flow resistance, optimize steam flow, reduce the formation of turbulence and eddy currents, and improve efficiency.

[0046] like Figure 5 As shown on the left side, the arrow indicates the direction of entry of steam. Two sets of positioning plates 101b are arranged between the steam inlet 106 and the connection between the first air inner tube 101 of the head. The two sets of positioning plates 101b need to be staggered at intervals so as not to affect the circulation of steam. The concave surface M is directed toward one side of the steam inlet 106, so that the circulation retention of steam at the connection is relatively reduced, and the damage to the sealing part is reduced, thereby facilitating the long-term implementation of the heating effect. The concave surface M is designed in a direction to further guide the steam to flow toward the tail.

[0047] Preferably, the inlet of the jumper tube 105 is located between two groups of positioning plates 101b at the rear of the first endotracheal tube 101, and is located in the middle position staggered with respect to a single positioning plate 101b of an adjacent group.

[0048] Preferably, the concave surface M on a group of positioning plates 101b relatively close to the steam inlet 106 and located adjacent to the jumper tube 105 is closer to the jumper tube 105 than the convex surface N; the concave surface M on a group of positioning plates 101b between the jumper tube 105 and the tail ellipsoidal tube cap 107 is closer to the jumper tube 105 than the convex surface N.

[0049] Preferably, a drain outlet 108 is provided at the tail end of the second heating jacket 104 .

[0050] Among them, there are two groups of positioning plates 101b located at the tail, and the concave surface M of the positioning plate 101b closer to the tail connection is facing the direction of steam flow, while the convex surface N of the other group of positioning plates 101b is facing the direction of steam flow. The two groups of positioning plates 101b cooperate with each other, which not only reduces the impact of steam at the connection, but also is not only a single group of positioning plates 101b, but also the two groups cooperate with each other to guide the steam into the jumper pipe 105, improve the overall efficiency, and enable the steam to be more efficiently transmitted to the second heating jacket pipe 104.

[0051] The positioning plate arrangement in the present invention is suitable for the process of using a jumper tube 105 to guide steam from the previous pipeline into the next pipeline. The main consideration is that the previous pipeline needs to be able to transmit steam more efficiently. The positioning plate group arrangement proposed in this design is set in the previous pipeline, which can improve the heating effect.

[0052] In summary, steam is introduced into the cavity between the first endogas pipe 101 and the first heating jacket pipe 103, and the positioning plate is arranged, which is not only used to fix the position of the endogas pipe, but also to guide the flow of steam so that it can be more efficiently transported to the entire system pipeline, ensuring that the temperature of the tail end product is maintained during long-distance transportation.

[0053] Example 3

[0054] Reference Figure 1 to Figure 6 , which is the third embodiment of the present invention. This embodiment is based on the previous embodiment, but differs in that high-temperature steam is introduced at the steam inlet 106, and the steam enters between the first inner air pipe 101 and the first heating jacket pipe 103, so that the temperature of the medium in the first inner air pipe 101 is maintained; at the tee and elbow pipe, the first heating jacket pipe 103 and the second heating jacket pipe 104 are connected by a jumper pipe 105, and the steam enters the second heating jacket pipe 104, so that the temperature of the medium in the second inner air pipe 102 is maintained.

[0055] Among them, this setting includes but is not limited to the tee or elbow pipe, and can also be used in other situations where the jumper pipe 105 is needed to transmit steam. When the steam is transmitted into the jumper pipe 105, the proposed positioning plate arrangement is utilized, which facilitates the steam to be transmitted to the next pipeline more quickly.

[0056] In summary, high-temperature steam is introduced at the steam inlet to flow between the inner tube and the heating jacket, thereby providing continuous heat to the medium in the inner tube and maintaining its temperature. In the long-distance transportation process, in order to avoid the temperature drop of the tail-end product, the system uses jumper tubes to connect different heating jackets at key positions such as tees and elbows to ensure that steam can be effectively transferred between each pipe section and maintain the temperature stability of the medium during the entire transportation process. This design achieves uniform heating of the conveying medium by precisely controlling the flow and distribution of steam, effectively preventing temperature loss caused by excessive distance.

[0057] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0058] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0059] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A gas pipeline jacket structure, characterized in that: include, A long-distance transport assembly (100) comprises a first endotracheal tube (101) and a second endotracheal tube (102) welded together, a first heating jacket pipe (103) arranged outside the first endotracheal tube (101), and a second heating jacket pipe (104) arranged outside the second endotracheal tube (102); and A jumper pipe (105) is provided between the tail of the first heating jacket pipe (103) and the head of the second heating jacket pipe (104), and a steam inlet (106) is also provided on the first heating jacket pipe (103).

2. The gas pipeline jacket structure according to claim 1, characterized in that: The ends of the first heating jacket pipe (103) and the second heating jacket pipe (104) are provided with ellipsoidal pipe caps (107), and the first heating jacket pipe (103) and the first gas inner pipe (101), and the second heating jacket pipe (104) and the second gas inner pipe (102) are sealed and connected by the ellipsoidal pipe caps (107).

3. The gas pipeline jacket structure according to claim 2, characterized in that: An anti-collision plate (101a) is provided on the outer wall of the first inner air pipe (101), and the anti-collision plate (101a) is located below the steam inlet (106).

4. The gas pipeline jacket structure according to claim 3, characterized in that: Positioning plates (101b) are provided on the outer walls of the first endotracheal tube (101) and the second endotracheal tube (102); five groups of positioning plates (101b) are provided inside the first endotracheal tube (101), and each group of positioning plates (101b) has three positioning plates (101b) evenly spaced around the circumference.

5. The gas pipeline jacket structure according to claim 4, characterized in that: A group of positioning plates (101b) is arranged at the middle position of the first endotracheal tube (101), and two groups of spaced-apart positioning plates (101b) are arranged at the head and tail of the first endotracheal tube (101), and the two groups of positioning plates (101b) at the head and tail of the first endotracheal tube (101) are arranged in an alternating manner.

6. The gas pipeline jacket structure according to claim 5, characterized in that: The positioning plates (101b) located at the head and tail of the first inner air pipe (101) are respectively provided with a concave surface (M) and a convex surface (N) along the steam flow direction, and the angles formed by the vertices of the concave surface (M) and the convex surface (N) and their tangent lines are between 10° and 30°; Two groups of positioning plates (101b) located at the head of the first endotracheal tube (101) are arranged between the steam inlet (106) and the ellipsoidal tube cap (107) adjacent thereto, and the concave surface (M) on the positioning plate (101b) is located on a side close to the steam inlet (106).

7. The gas pipeline jacket structure according to claim 6, characterized in that: The inlet of the jumper tube (105) is located between two groups of positioning plates (101b) at the rear of the first endotracheal tube (101), and is located in a middle position staggered with respect to a single positioning plate (101b) of an adjacent group.

8. The gas pipeline jacket structure according to claim 7, characterized in that: The concave surface (M) on a group of positioning plates (101b) relatively close to the steam inlet (106) and located adjacent to the jumper tube (105) is closer to the jumper tube (105) than the convex surface (N); The concave surface (M) on a set of positioning plates (101b) between the jumper tube (105) and the tail ellipsoidal tube cap (107) is closer to the jumper tube (105) than the convex surface (N).

9. The gas pipeline jacket structure according to any one of claims 1 to 8, characterized in that: The tail portion of the second heating jacket pipe (104) is provided with a drain outlet (108).

10. A working method of a gas pipeline jacket, characterized in that: The gas pipeline jacket structure comprises the gas pipeline jacket structure as claimed in any one of claims 1 to 9, further comprising: By introducing high-temperature steam at the steam inlet (106), the steam enters between the first inner air pipe (101) and the first heating jacket pipe (103), so that the temperature of the medium in the first inner air pipe (101) is maintained; At the tee and elbow pipe, the first heating jacket pipe (103) and the second heating jacket pipe (104) are connected through a jumper pipe (105), and steam enters the second heating jacket pipe (104) to maintain the temperature of the medium in the second gas inner pipe (102).

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