High-temperature medium-pressure steam pipeline compensation structure

Abstract

The utility model relates to the technical field of pipeline engineering, in particular to a high-temperature medium-pressure steam pipeline compensation structure which comprises a steam working pipe and a plurality of supporting frame assemblies, the supporting frame assemblies are supported below the steam working pipe, and the steam working pipe comprises a turning natural compensation pipe set and a linear section thermal compensation pipe. The turning natural compensation pipe group comprises a three-dimensional turning pipe and a pair of vertical pipes, the pair of vertical pipes is connected to a vertical pipeline of the three-dimensional turning pipe, the linear section thermal compensation pipe is connected to the three-dimensional turning pipe, and the linear section thermal compensation pipe is provided with a rotary compensator assembly which is arranged in a Z shape. The high-temperature medium-pressure steam pipeline thermal compensation device solves the technical problems that in the prior art, due to a high-temperature medium-pressure steam pipeline thermal compensation mode, the pipeline unfolding distance is long, and the hydraulic working condition is poor, the number of pipeline elbows and the length of the pipeline are reduced, the mode is wide in application range, safe and reliable, and the construction cost can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline engineering, in particular to a high-temperature medium-pressure steam pipeline compensation structure. Background Art

[0002] Chemical enterprises have a great demand for high-temperature medium-pressure steam, and need to build corresponding high-temperature medium-pressure long-distance steam transmission pipelines. Such pipelines are generally laid inside power plants and use natural compensation for thermal compensation. When the high-temperature medium-pressure steam pipeline is adjusted after turning and connected to the straight pipe section by natural compensation, Fig.15 , Fig.18 and Fig.19 As shown, a three-dimensional π-type and a two-dimensional π-type natural compensation combination is generally adopted. This method is used for long-distance transportation outside the factory, but has the problems of long pipeline deployment distance, poor hydraulic conditions, and high engineering cost. In the existing technology, the low-parameter steam pipeline layout will use the corner position to install rotary compensators on a pair of vertical pipes of the three-dimensional "π-shaped" structure to perform steam pipeline thermal compensation. In terms of thermal compensation of high-temperature and medium-pressure steam pipelines, this method has the problem of large friction inside the rotary compensator, which makes the rotor unable to rotate and causes instability of the pipeline system.

[0003] In summary, there is an urgent need for a thermal compensation structure that can reduce the length of the pipeline deployment distance to solve the problems existing in the prior art. Utility Model Content

[0004] The utility model aims to provide a high-temperature medium-pressure steam pipeline compensation structure to solve the technical problems of long pipeline deployment distance and poor hydraulic conditions caused by the thermal compensation method of high-temperature medium-pressure steam pipeline in the prior art. The specific technical solution is as follows:

[0005] The utility model provides a high-temperature and medium-pressure steam pipeline compensation structure, including a steam working pipe and a plurality of support frame assemblies, wherein the plurality of support frame assemblies are supported below the steam working pipe, the steam working pipe includes a natural compensation pipe group at a turning point and a straight-segment thermal compensation pipe, the natural compensation pipe group at a turning point includes a three-dimensional turning pipe and a pair of vertical pipes, the pair of vertical pipes are connected to the vertical pipe of the three-dimensional turning pipe, the straight-segment thermal compensation pipe is connected to the three-dimensional turning pipe, and the straight-segment thermal compensation pipe is provided with a rotating compensator assembly arranged in a Z shape.

[0006] A further improvement of the high-temperature and medium-pressure steam pipeline compensation structure of the utility model is that the rotary compensator assembly includes a first horizontal short pipe, two second horizontal short pipes, two first elbows and two rotary compensators, the two ends of the two first elbows are respectively connected to the steam working pipe, the two rotary compensators are located between the two first elbows, the two rotary compensators are connected by the second horizontal short pipe, and the rotary compensator is connected to the first elbow by the first horizontal short pipe.

[0007] A further improvement of the high-temperature and medium-pressure steam pipeline compensation structure of the utility model is that the support frame assembly includes a pier, an insulating pipe support and a limit block, the insulating pipe support is fixed on the pier, and the limit block is fixed on the pier and the insulating pipe support.

[0008] A further improvement of the high-temperature and medium-pressure steam pipeline compensation structure of the utility model is that the thermal insulation pipe support includes an upper structure, a lower structure and a connecting piece. The upper structure is docked with the lower structure and connected through the connecting piece. A cavity for accommodating the steam working pipe is formed between the upper structure and the lower structure.

[0009] A further improvement of the high-temperature and medium-pressure steam pipeline compensation structure of the utility model is that a first insulation block is provided on the inner side of the upper structure, a first insulation pad is provided on the inner side of the first insulation block, and a second insulation block is provided on the inner side of the lower structure, and a second insulation pad is provided on the inner side of the second insulation block.

[0010] A further improvement of the high-temperature medium-pressure steam pipeline compensation structure of the utility model is that the buttress is a mouth-shaped frame or a sun-shaped frame, and the mouth-shaped frame or the sun-shaped frame is arranged at the corner position of the steam working pipe.

[0011] A further improvement of the high-temperature medium-pressure steam pipeline compensation structure of the utility model is that the pier is an axial fixing bracket or a single-sided axial limiting bracket, and the axial fixing bracket or the single-sided axial limiting bracket is arranged at both ends of the straight section of the steam working pipe.

[0012] A further improvement of the high-temperature medium-pressure steam pipeline compensation structure of the utility model is that the buttress is a sliding bracket, and the sliding bracket is arranged at intervals on the straight section of the steam working pipe.

[0013] A further improvement of the high-temperature medium-pressure steam pipeline compensation structure of the utility model is that the buttress is a guide bracket, and the guide bracket is arranged at intervals on the straight section of the steam working pipe and is located between the sliding brackets.

[0014] A further improvement of the high-temperature medium-pressure steam pipeline compensation structure of the utility model is that the buttress is a block bracket, and the block bracket is arranged at the positions of the steam working pipe at both ends of the rotary compensator assembly.

[0015] The application of the technical solution of the utility model has the following beneficial effects:

[0016] The utility model adopts natural compensation at the bends and adopts a push structure arrangement of the rotary compensator arranged in a "Z-shaped" manner in the straight line section, which solves the technical problems of the high-temperature and medium-pressure steam pipeline thermal compensation method in the prior art, which leads to long pipeline deployment distance and poor hydraulic conditions. The utility model avoids overload damage to pipe supports and civil piers in the pipeline system due to unreasonable arrangement of rotary compensators, and converts non-straight pipelines with bends and elevation changes into a method of achieving thermal compensation by adopting a "Z-shaped" arrangement of rotary compensators and push structures, reducing the number of pipeline elbows and the length of the pipeline. The method has a wide range of applications, is safe and reliable, and can significantly reduce the cost of the project.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 It is the overall plan view of the high-temperature medium-pressure steam pipeline compensation structure of the utility model;

[0020] Figure 2 It is a plan view of the mouth-shaped frame of the high-temperature medium-pressure steam pipeline compensation structure of the utility model;

[0021] Figure 3 It is a plan view of a sun-shaped frame of a high-temperature medium-pressure steam pipeline compensation structure of the utility model;

[0022] Figure 4 It is a plan view of the axial fixing bracket of the high-temperature medium-pressure steam pipeline compensation structure of the utility model;

[0023] Figure 5 It is a plan view of a single-side axial limit bracket of a high-temperature and medium-pressure steam pipeline compensation structure of the utility model;

[0024] Figure 6 It is a plan view of the sliding bracket of the high-temperature medium-pressure steam pipeline compensation structure of the utility model;

[0025] Figure 7 It is a plan view of the guide bracket of the high-temperature medium-pressure steam pipeline compensation structure of the utility model;

[0026] Figure 8 It is a plan view of the block bracket and the rotary compensator assembly of the high-temperature and medium-pressure steam pipeline compensation structure of the utility model;

[0027] Fig. 9 It is a cross-sectional view of the fixed crossbeam position of the high-temperature and medium-pressure steam pipeline compensation structure of the utility model;

[0028] Fig.10 It is a side view of the fixed crossbeam position of the high-temperature and medium-pressure steam pipeline compensation structure of the utility model;

[0029] Fig.11 It is a cross-sectional view of the position of the axial limit beam of the high-temperature and medium-pressure steam pipeline compensation structure of the utility model;

[0030] Fig.12 It is a side view of the position of the axial limit beam of the high-temperature and medium-pressure steam pipeline compensation structure of the utility model;

[0031] Fig.13 It is a cross-sectional view of the position of the lateral limiting beam of the high-temperature and medium-pressure steam pipeline compensation structure of the utility model;

[0032] Fig.14 It is a side view of the position of the lateral limiting beam of the high-temperature and medium-pressure steam pipeline compensation structure of the utility model;

[0033] Fig.15 It is a plan view of a heat compensation structure of a high-temperature medium-pressure steam pipeline in the prior art;

[0034] Fig.16 It is a schematic diagram of the two-dimensional L-shaped elbow structure of the prior art;

[0035] Fig.17 It is a schematic diagram of the two-dimensional Z-elbow structure of the prior art;

[0036] Fig.18 It is a schematic diagram of the combined structure of a two-dimensional π-shaped elbow in the prior art;

[0037] Fig.19 It is a schematic diagram of the three-dimensional π-shaped elbow combination structure in the prior art.

[0038] Among them, 1. steam working pipe; 2. corner fixing bracket; 3. first short riser; 4. horizontal pipe; 5. second short riser; 6. single-side axial limit bracket; 7. sliding bracket; 8. guide bracket; 9. block bracket; 10. first elbow; 11. rotary compensator; 12. first horizontal short pipe; 13. second horizontal short pipe; 14. axial fixing bracket; 15. double fixing structure; 16. embedded steel plate; 17. lower block of pipe support; 18. lateral limit block of pipe support; 19. fixed beam; 20. lateral limit beam; 21. axial limit beam; 22. stainless steel mirror panel; 23. bottom plate of pipe support; 24. lower structure; 25. anchor bolt; 26. first thermal insulation block; 27. upper structure; 28. upper block of pipe support. DETAILED DESCRIPTION

[0039] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0040] like Figure 15 to Figure 19 As shown, the prior art realizes thermal compensation of the straight pipe section after adjusting the elevation of the high-temperature and medium-pressure steam pipeline after turning, generally adopts a combination of two-dimensional L-type, two-dimensional Z-type, two-dimensional π-type, and three-dimensional π-type natural compensation. This method uses many elbows and has a long pipeline expansion length. It is used for long-distance pipelines. The hydraulic conditions are poor and the project cost is high. A high-temperature and medium-pressure long-distance steam pipeline with a design steam temperature parameter of 510°C and a pressure of 5.83MPa(g) is taken as an example for software simulation calculation. If the straight section of the long-distance steam pipeline under this parameter condition adopts two-dimensional π-type natural compensation, the length of the entire pipeline will increase by at least 35%, and a large number of elbows will need to be added.

[0041] See also Figures 1 to 19 As shown, in view of the above problems, the utility model provides a high-temperature medium-pressure steam pipeline compensation structure to solve the above technical problems, which includes a steam working pipe 1 and a plurality of support frame assemblies, and the plurality of support frame assemblies are supported below the steam working pipe 1. The steam working pipe 1 includes a natural compensation pipe group at the turning point and a straight-segment thermal compensation pipe. The natural compensation pipe group at the turning point includes a three-dimensional turning pipe and a pair of vertical pipes, and the pair of vertical pipes are connected to the vertical pipe of the three-dimensional turning pipe. The straight-segment thermal compensation pipe is connected to the three-dimensional turning pipe, and the straight-segment thermal compensation pipe is provided with a rotating compensator assembly arranged in a Z shape. Specifically, the three-dimensional turning pipe includes a first short vertical pipe 3, a second short vertical pipe 5, and a horizontal pipe 4 connected between the first short vertical pipe 3 and the second short vertical pipe 5, and is connected to a vertical pipe through the first short vertical pipe 3 and the second short vertical pipe 5, respectively, so as to change the elevation of the three-dimensional turning pipe. This scheme is aimed at long-distance compensation of high-temperature medium-pressure steam pipelines, and the distance is generally more than fifteen kilometers. The three-dimensional turning pipe is in a three-dimensional π shape, and a pair of vertical pipes can lengthen the vertical pipe in the three-dimensional turning pipe, so as to adjust the overall height of the three-dimensional turning pipe by connecting vertical pipes of different lengths. The 90° elbow of the three-dimensional turning pipe is used to construct an adjustable elevation space structure, and a long straight line pipe section is connected after the corner, and a rotary compensator 11 is used to perform long-distance thermal compensation in the long straight line section. In this embodiment, the utility model constructs a three-dimensional "π-shaped" structure through four 90° elbows, two vertical pipes, and one horizontal pipe 4, and the elevation of the A-axis and B-axis pipes can be adjusted, and a straight line section is connected after an arbitrary angle α, and a pair of "Z-shaped" arranged rotary compensators 11 are used in the straight line section to achieve thermal compensation of the steam pipeline.

[0042] like Figure 1As shown, the utility model converts the non-straight pipeline with turns and elevation changes in the high-temperature medium-pressure steam pipeline into a natural compensation at the turn, and the superimposed straight line section adopts a "Z-shaped" arrangement of the rotary compensator 11 to achieve thermal compensation, which can increase the overall length of the pipeline by about 3-5%, and the number of elbows is relatively small. This method has a wide range of applications, uses fewer elbows, has excellent pipeline hydraulic conditions, and has a low engineering cost. It can also avoid overload damage to the pipe support bracket and civil pier in the system due to unreasonable arrangement of the rotary compensator 11.

[0043] Preferably, Figure 8 As shown, the rotary compensator assembly includes a first horizontal short pipe 12, two second horizontal short pipes 13, two first elbows 10 and two rotary compensators 11. The two ends of the two first elbows 10 are respectively connected to the steam working pipe 1. The two rotary compensators 11 are located between the two first elbows 10. The two rotary compensators 11 are connected by the second horizontal short pipe 13. The rotary compensator 11 is connected to the first elbow 10 by the first horizontal short pipe 12. After the rotary compensator assembly is installed, a "Z-shaped" arrangement of the rotary compensators 11 push structure is formed, thereby achieving the effect of thermal compensation of the straight section pipeline, avoiding a large number of elbows in the straight section, and shortening the overall expansion distance of the pipeline. In this embodiment, the first elbow 10 is 135°.

[0044] Preferably, the support frame assembly includes a buttress, an insulation pipe support and a limit stopper, the insulation pipe support is fixed on the buttress, and the limit stopper is fixed on the buttress and the insulation pipe support. The limit stopper includes a pipe support upper side stopper 28, a pipe support lower side stopper 17 and a pipe support lateral limit stopper 18. The pipe support lower side stopper 17 and the pipe support lateral limit stopper 18 both adopt a structure of a bottom plate, a vertical plate and a diagonal support plate, the vertical plate is vertically fixed on the bottom plate, and the diagonal support plate is fixed between the vertical plate and the bottom plate.

[0045] Preferably, Fig. 9 As shown, the heat-insulated pipe support includes an upper structure 27, a lower structure 24 and a connecting piece, wherein the upper structure 27 is butted with the lower structure 24 and connected through the connecting piece, and a cavity for accommodating the steam working pipe 1 is formed between the upper structure 27 and the lower structure 24. The connecting piece is an anchor bolt 25, and the upper structure 27 and the lower structure 24 are connected by the anchor bolt 25.

[0046] Preferably, a first heat insulation block 26 is provided inside the upper structure 27, a first heat insulation pad is provided inside the first heat insulation block 26, a second heat insulation block is provided inside the lower structure 24, and a second heat insulation pad is provided inside the second heat insulation block. The inner side of the lower structure 24 has the same structure as the inner side of the upper structure 27, so that a circular ring surrounding the outer periphery of the steam working pipe 1 is formed between the first heat insulation pad and the second heat insulation pad. In this embodiment, both the first heat insulation block 26 and the second heat insulation block are made of hard heat insulation blocks, and both the first heat insulation pad and the second heat insulation pad are made of soft heat insulation pads.

[0047] In view of the stress and displacement conditions of the pipeline system, the piers at the corner positions adopt the "mouth-shaped" or "day-shaped" fixed forms, and the single-side axial limit brackets 6 and the axial fixed brackets 14 adopt the "I-shaped" pier forms. At the nodes where displacement needs to be controlled in the straight line section, a "gate-shaped" guiding bracket 8 is set to control the lateral displacement of the pipeline. For the first bracket on both sides of the push structure of the "Z-shaped" arranged rotary compensator 11, a "gate-shaped" stop bracket 9 is adopted to prevent the pipeline from slipping off the pipe rack due to abnormal conditions such as water hammer vibration. At other positions, a "T-shaped" sliding bracket 7 is used to support the weight of the pipeline. The pipeline bracket is composed of a civil engineering pier, a heat insulation pipe support, and a limit stop. The steam working pipe 1 and the support assembly form an organic whole.

[0048] Preferably, the pier is a mouth-shaped frame, and the mouth-shaped frame is arranged at the corner of the steam working pipe 1, such as Figure 2 shown. This bracket is used for occasions where the pipeline nodes need to be fixed and the bending moment value is relatively small. Specifically, the lower structure 24 of the heat insulation pipe support includes a pipe support bottom plate 23. The mouth-shaped frame includes multiple columns, a fixed cross beam 19, and a second cross beam. Both the fixed cross beam 19 and the second cross beam are fixed at the top of the columns. Embedded steel plates 16 are provided on both the fixed cross beam 19 and the second cross beam. A pipe support lower side stop 17 and a pipe support lateral limit stop 18 are provided on the fixed cross beam 19. During installation, the pipe support bottom plate 23 is welded and fixed to the embedded steel plate 16. Two pipe support lower side stops 17 are used to clamp both sides of the fixed cross beam 19 and are respectively welded to the embedded plate of the fixed cross beam 19 to form a double fixed structure 15, so that the pipeline is completely fixed. The pipe support upper side stop 28 is attached to both sides of the lower structure 24 of the pipe support, and the top of the pipe support upper side stop 28 is welded and fixed to the steam working pipe 1. Two pipe support lateral limit stops 18 are used to closely attach to the side of the pipe support and are welded to the embedded steel plate 16 of the second cross beam to enhance the anti-torsion ability of the fixed bracket. This mouth-shaped frame is used in combination with the single-side axial limit bracket 6.

[0049] Preferably, the pier is a day-shaped frame, and the day-shaped frame is also arranged at the corner of the steam working pipe 1, such as Figure 3As shown, the bracket is used in situations where the pipeline node needs to be fixed and the bending moment value is large, which is a further strengthening of the mouth-shaped bracket. The sun-shaped bracket includes multiple columns, a fixed beam 19 and two second beams. The fixed beam 19 is located between the two second beams. The fixed beam 19 and the second beam are both fixed to the top of the column. The fixed beam 19 and the second beam are both provided with embedded steel plates 16. The pipe support bottom plate 23 and the embedded steel plate 16 are welded and fixed on the fixed beam 19 of the sun-shaped bracket. Two pipe support lower side blocks 17 are used to clamp the two sides of the fixed beam 19 and are respectively welded to the embedded plates of the fixed beam 19 to form a double fixed structure 15; two pipe support lateral limit blocks 18 are respectively used to press the side of the pipe support and welded to the embedded steel plates 16 of the two second beams to enhance the torsion resistance of the fixed bracket. The sun-shaped bracket is used in combination with the single-sided axial limit bracket 6.

[0050] Preferably, the buttress is an axial fixing bracket 14, and the axial fixing bracket 14 is arranged at both ends of the straight section of the steam working pipe 1. Figure 4 As shown, the axial fixing bracket 14 is in an I-shape in plane, and is used for axial fixing of pipeline nodes. The axial fixing bracket 14 includes multiple columns and three fixed beams 19, and the three fixed beams 19 are arranged in an I-shape in plane. An embedded steel plate 16 is provided on the middle fixed beam 19. The pipe support bottom plate 23 and the embedded steel plate 16 are welded and fixed on the middle fixed beam 19, and two pipe support lower side blocks 17 are used to clamp the two sides of the middle fixed beam 19, and are respectively welded to the embedded plates of the fixed beam 19 to form a double fixed structure 15.

[0051] Preferably, the buttress is a single-sided axial limit bracket 6, and the single-sided axial limit bracket 6 is arranged at both ends of the straight section of the steam working pipe 1, such as Figure 5 As shown, the axial fixing bracket 14 is in an I-shaped plane, which is used to limit the movement of the pipeline node in a single direction along the pipeline axis, and allows the pipeline to be displaced within a certain range in the radial and vertical directions. The unilateral axial limit bracket 6 can withstand a large axial reaction force during the startup and operation of the steam working pipe 1, which is helpful for the startup of the "Z-shaped" arrangement of the rotary compensator 11 push structure. The unilateral axial limit bracket 6 includes multiple columns and three axial limit beams 21, which are arranged in an I-shaped shape, and the axial limit beams 21 are provided with embedded steel plates 16. During installation, after the pipe support is placed on the axial limiting beam 21, the lower side block 17 of the pipe support is used to press the lower side of the pipe support bottom plate 23 against the axial limiting beam 21 on the side of the push structure of the rotary compensator 11 arranged in a "Z shape", and the pipe support bottom plate 23 is welded to the embedded steel plate 16 of the axial limiting beam 21, while the other side is not limited, thereby realizing the unilateral axial limiting function of the thermal insulation pipe support.

[0052] Preferably, the buttress is a sliding bracket 7, and the sliding bracket 7 is arranged at intervals on the straight section of the steam working pipe 1, such as Figure 6 As shown, the vertical direction of the sliding bracket 7 is a T-shaped structure, which is used to support the weight of the pipeline. The pipeline node can slide within a certain range in the plane, that is, it can slide in a small range in the lateral and axial directions, and the pier bears gravity and horizontal friction. The heat-insulating pipe bracket is arranged on the embedded steel plate 16 at the top of the sliding bracket 7. The pier is subjected to less horizontal force, so a "T-shaped" structure is adopted.

[0053] Preferably, the buttress is a guide bracket 8, which is arranged at intervals on the straight section of the steam working pipe 1 and is located between two sliding brackets 7, such as Figure 7 As shown, the guide bracket 8 is vertically shaped like a gate, which is used to limit the lateral displacement of the pipeline node. The heat-insulating pipe bracket is arranged on the embedded steel plate 16 at the top of the guide bracket 8. The limit gap of the guide bracket 8 is selected according to the calculated force conditions. The displacement of the pipeline node and the radial force need to be controlled within a suitable range. The guide bracket 8 is fixed to the embedded steel plate 16 at the top of the guide bracket 8 through two lateral limit blocks, so that the limit gap is generated between the two lateral limit blocks. In this embodiment, the limit gap is in the range of 45 to 55 mm, so that the lateral displacement and radial force of the pipeline node can reach a better balance point. If the limit gap is too small, the radial force of the pipeline node is large, and the civil engineering cost of the "gate-shaped" guide bracket 8 will be too large; if the limit gap is too large, the lateral displacement of the pipeline node increases during the heating process, which is easy to cause instability when the pipeline thermal expansion pushes the rotary compensator 11.

[0054] Preferably, the buttress is a block bracket 9, and the block bracket 9 is arranged at the positions of the steam working pipe 1 at both ends of the rotary compensator assembly, such as Figure 8 As shown, the bracket is used to prevent the pipeline from sliding off the pier. The block bracket 9 includes at least two columns and a lateral limit beam 20. The lateral limit beam 20 is provided with an embedded steel plate 16. Both sides of the lateral limit beam 20 are provided with lateral limit blocks with a wide distance to prevent the "Z-shaped" arrangement of the rotary compensator 11 from sliding due to water hammer vibration. The heat-insulating pipe support is arranged on the embedded steel plate 16 at the top of the block bracket 9, and the lateral limit block is installed on the embedded steel plate 16 to form a wide limit, that is, the limit gap is greater than 55mm. Since the "Z-shaped" arrangement of the rotary compensator 11 has a large load on the push structure, the pier adopts a "gate-shaped" structure for greater stability.

[0055] The specific construction steps are described in detail below:

[0056] The first step: lay out and construct the civil piers at each node on the A-axis and the B-axis. A mouth-shaped or sun-shaped corner fixing bracket 2 is selected at the corner position on the A-axis according to the stress conditions. A single-sided axial limit bracket 6 is set near the corner on the B-axis. An axial fixing bracket 14 is set at the end of the B-axis away from the corner. A "Z-shaped" rotary compensator 11 is arranged at both ends of the push structure, and block brackets 9 are set respectively. The middle section uses two sliding brackets 7 and a guide bracket 8 alternately arranged. The distance between each pier is set according to the actual needs of the site.

[0057] Step 2: After the civil engineering buttress has reached the required strength through maintenance, the lower structure 24 of the heat-insulating pipe support is placed on the pre-buried steel plate 16 on the top.

[0058] Step 3: Install the steam working pipe 1 on the pipe support lower structure 24 and complete the welding connection, and then install the three-dimensional bending pipe and the Z-shaped rotary compensator 11.

[0059] Step 4: Install the upper structure 27 of the heat-insulating pipe support, adjust the offset amount of the pipe support in combination with the displacement of the pipeline node, and complete the installation of the anchor bolts 25 of the upper structure 27 and the lower structure 24 of the pipe support.

[0060] Step 5: Weld and fix the corner fixing bracket 2 and install each limit block. Fig. 9 , Fig.10 , level the pipe support bottom plate 23, complete the welding of the pipe support bottom plate 23 and the embedded steel plate 16 on the top of the fixed beam 19, and weld the pipe support lower side block 17 and the fixed beam 19 tightly on both sides of the fixed beam 19 below the pipe support bottom plate 23. Place the pipe support upper side block 28 close to both sides of the pipe support lower structure 24 below the steam working pipe 1, and weld the top of the pipe support upper side block 28 to the steam working pipe 1; Fig.13 , Fig.14 The lateral limit stoppers 18 of the pipe support are placed on the embedded steel plates 16 of the lateral limit beams 20 close to both sides of the pipe support bottom plate 23 , and are welded to the embedded steel plates 16 on the top of the lateral limit beams 20 .

[0061] Step 6: Install the limit block of the unilateral axial limit bracket 6. Fig.11 , Fig.12 , weld the lower stopper 17 of the pipe support to the axial limit beam 21 on the side close to the "Z-shaped" rotary compensator 11 structure below the pipe support. Place the upper stopper 28 of the pipe support close to both sides of the lower structure 24 of the pipe support below the steam working pipe 1, and weld the top arc-shaped steel plate of the upper stopper 28 of the pipe support to the steam working pipe 1.

[0062] Step 7: Install the guide bracket 8 and the stopper bracket 9. Fig.13 , Fig.14, the side limit blocks 18 of the pipe support are placed on both sides of the pipe support bottom plate 23 on the embedded steel plate 16 at the top of the side limit beam 20, and are welded firmly at a certain limit distance (the distance is determined by the process conditions). If the sliding friction coefficient needs to be reduced, the stainless steel mirror plate 22 is fully welded on the lower side of the pipe support bottom plate 23.

[0063] Step 8: Weld and fix the axial fixing bracket 14 and install the limit block. Fig. 9 , Fig.10 , level the pipe support bottom plate 23, complete the welding of the pipe support bottom plate 23 and the embedded steel plate 16 on the top of the pipe support fixed beam 19, and weld the pipe support lower side block 17 and the fixed beam 19 tightly on both sides of the pipe support fixed beam 19 below the pipe support bottom plate 23. Under the steam working pipe 1, place the pipe support upper side block 28 close to both sides of the pipe support lower structure 24, and weld the pipe support upper side block 28 to the steam working pipe 1.

[0064] The high-temperature medium-pressure steam pipeline compensation structure of the utility model adopts natural compensation at the turning point and adopts the push structure arrangement of the "Z-shaped" arrangement of the rotary compensator 11 in the straight line section, which solves the technical problems of the high-temperature medium-pressure steam pipeline thermal compensation method in the prior art, which leads to long pipeline deployment distance and poor hydraulic working conditions. The utility model avoids the overload damage of the pipe support bracket and the civil pier in the pipeline system due to the unreasonable arrangement of the rotary compensator 11, and converts the non-straight pipeline with turning and elevation changes into a method of realizing thermal compensation by adopting the "Z-shaped" arrangement of the rotary compensator 11 push structure, reducing the number of pipeline elbows and the length of the pipeline, and the method has a wide range of applications, is safe and reliable, and can greatly reduce the project cost.

[0065] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high-temperature medium-pressure steam pipeline compensation structure, characterized in that: The invention comprises a steam working pipe (1) and a plurality of support frame assemblies, wherein the plurality of support frame assemblies are supported below the steam working pipe (1), wherein the steam working pipe (1) comprises a natural compensation pipe group at a turning point and a straight section thermal compensation pipe, wherein the natural compensation pipe group at a turning point comprises a three-dimensional turning pipe and a pair of vertical pipes, wherein the pair of vertical pipes are connected to the vertical pipe of the three-dimensional turning pipe, wherein the straight section thermal compensation pipe is connected to the three-dimensional turning pipe, and wherein the straight section thermal compensation pipe is provided with a rotating compensator assembly arranged in a Z shape.

2. The high-temperature medium-pressure steam pipeline compensation structure according to claim 1 is characterized in that: The rotary compensator assembly comprises a first horizontal short pipe (12), two second horizontal short pipes (13), two first elbows (10) and two rotary compensators (11); the two ends of the two first elbows (10) are respectively connected to the steam working pipe (1); the two rotary compensators (11) are located between the two first elbows (10); the two rotary compensators (11) are connected via the second horizontal short pipe (13); and the rotary compensators (11) and the first elbows (10) are connected via the first horizontal short pipe (12).

3. The high-temperature medium-pressure steam pipeline compensation structure according to claim 1 is characterized in that: The support frame assembly includes a buttress, a heat-insulating pipe support and a limit stopper, wherein the heat-insulating pipe support is fixed on the buttress, and the limit stopper is fixed on the buttress and the heat-insulating pipe support.

4. The high-temperature medium-pressure steam pipeline compensation structure according to claim 3 is characterized in that: The heat-insulated pipe support comprises an upper structure (27), a lower structure (24) and a connecting piece, wherein the upper structure (27) is butt-jointed with the lower structure (24) and connected via the connecting piece, and a cavity for accommodating the steam working pipe (1) is formed between the upper structure (27) and the lower structure (24).

5. The high-temperature medium-pressure steam pipeline compensation structure according to claim 4 is characterized in that: A first thermal insulation block (26) is provided on the inner side of the upper structure (27), a first thermal insulation pad is provided on the inner side of the first thermal insulation block (26), a second thermal insulation block is provided on the inner side of the lower structure (24), and a second thermal insulation pad is provided on the inner side of the second thermal insulation block.

6. The high-temperature medium-pressure steam pipeline compensation structure according to claim 3 is characterized in that: The buttress is a mouth-shaped frame or a sun-shaped frame, and the mouth-shaped frame or the sun-shaped frame is arranged at the corner position of the steam working pipe (1).

7. The high-temperature medium-pressure steam pipeline compensation structure according to claim 3 is characterized in that: The buttress is an axial fixing bracket (14) or a single-sided axial limiting bracket (6), and the axial fixing bracket (14) or the single-sided axial limiting bracket (6) is arranged at both ends of the straight section of the steam working pipe (1).

8. The high-temperature medium-pressure steam pipeline compensation structure according to claim 3 is characterized in that: The buttress is a sliding bracket (7), and the sliding bracket (7) is arranged at intervals on the straight section of the steam working pipe (1).

9. The high-temperature medium-pressure steam pipeline compensation structure according to claim 8, characterized in that: The buttress is a guide bracket (8), and the guide bracket (8) is arranged at intervals on the straight section of the steam working pipe (1) and is located between the sliding brackets (7).

10. The high-temperature medium-pressure steam pipeline compensation structure according to claim 3, characterized in that: The buttress is a block bracket (9), and the block bracket (9) is arranged at the positions of the steam working pipe (1) at both ends of the rotary compensator assembly.

Images