Gas turbine air intake heating device

Abstract

The present application relates to air intake heating technical field, particularly to a kind of gas turbine air intake heating device, including, heat exchanger body, it includes multiple symmetrically arranged heat exchange pipe, and the connecting pipe of the both ends of adjacent heat exchange pipe connection;Marking assembly, it includes marking shell, detection piece and plugging piece, the marking shell is installed at heat exchange pipe and connecting pipe junction, the detection piece is installed below heat exchange pipe for detecting whether leakage, the plugging piece is located inside heat exchange pipe.The beneficial effects of the present application are when heat exchange pipe appears damage phenomenon and leads to leakage, marking shell expands by absorbing liquid to remove the constraint to plugging piece, so that plugging piece rotates, plugging piece rotates in the process will squeeze out the solution in cavity, to change the color of display shell, so staff can quickly distinguish whether the heat exchange pipe is damaged by observing whether the color of display shell changes, facilitate staff timely maintenance.

Description

Technical Field

[0001] This invention relates to the field of intake air heating technology, and in particular to an intake air heating device for a gas turbine. Background Technology

[0002] During normal operation, the gas turbine adjusts its status according to grid demand, typically operating under partial load. In this state, as the load rate decreases, the gas turbine's power and the energy emitted from the waste heat boiler also decrease, leading to a decline in the combined cycle's power and efficiency. Extensive research, calculations, and analysis have revealed that heating the gas turbine's intake air can increase compressor efficiency and simultaneously improve the gas turbine's exhaust flow rate, thereby enhancing the combined cycle's efficiency and resulting in significant economic benefits.

[0003] Currently, finned tube heat exchangers are used to heat the intake gas. However, with long-term use or corrosion from the medium, the pipes of the finned tube heat exchangers may break, leading to leakage problems. Furthermore, it is not easy for staff to observe the leak points, so multiple pipes need to be disassembled and inspected, which is time-consuming and labor-intensive. Summary of the Invention

[0004] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application, and such simplifications or omissions shall not be used to limit the scope of the invention.

[0005] The purpose of this invention is to provide a gas turbine intake heating device.

[0006] Therefore, its purpose is to solve the problem that the pipeline may be damaged due to long-term use or the corrosive effect of the medium, which may lead to leakage.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a gas turbine intake heating device, comprising a heat exchanger body, which includes a plurality of symmetrically arranged heat exchange tubes and a connecting pipe connecting the two ends of adjacent heat exchange tubes; a marking assembly, comprising a marking shell, a detection element, and a sealing element, wherein the marking shell is installed at the connection between the heat exchange tubes and the connecting pipe, the detection element is installed below the heat exchange tubes for detecting whether there is leakage, and the sealing element is located inside the heat exchange tubes and is driven to rotate by the detection element; and a display shell, which is installed outside the marking shell for marking whether the pipeline is leaking.

[0008] In a preferred embodiment of the gas turbine intake heating device of the present invention, the marking shell is connected to the heat exchange tube and the connecting tube respectively through flanges, and gaskets are installed between adjacent flanges. The connecting tube is bent to connect multiple individual heat exchange tubes into a whole to form a heat exchange pipeline.

[0009] As a preferred embodiment of the gas turbine intake heating device of the present invention, wherein: a drive ring is rotatably connected inside the marking shell, a plurality of protruding protrusions are fixedly provided on the outer periphery of the drive ring, and a compression spring abuts between the drive ring and the marking shell;

[0010] The display housing has multiple cavities inside, each filled with a solution. The display housing has observation windows at positions corresponding to the cavities, and the drive ring is located inside the cavities to squeeze out the solution.

[0011] As a preferred embodiment of the gas turbine intake heating device of the present invention, the detection element includes a detection tube fixed to the bottom of the heat exchange tube, and the surface of the detection tube is provided with multiple detection holes, and a water guiding layer is placed inside the detection tube.

[0012] As a preferred embodiment of the gas turbine intake heating device of the present invention, the detection element includes a snap-fit ​​block installed inside the marking shell, and a force-applying layer abuts against one side of the snap-fit ​​block. The force-applying layer is connected to the water-guiding layer. A snap-fit ​​groove is opened on the outer side of the drive ring to snap into the snap-fit ​​block. A pull rope spring is fixedly connected between the snap-fit ​​block and the marking shell.

[0013] As a preferred embodiment of the gas turbine intake heating device of the present invention, the sealing component includes a plurality of fixed blocks and movable blocks distributed along the axis of the heat exchange tube. The fixed blocks are fixed to the inner wall of the heat exchange tube, the movable blocks are slidably connected to the heat exchange tube, a shielding layer is fixedly connected between the fixed blocks and the movable blocks, and both ends of the movable blocks are fixedly connected to the drive ring.

[0014] In a preferred embodiment of the gas turbine intake heating device of the present invention, the fixed block has an abutment groove on the side away from the movable block, and the movable block has an abutment block fixed on the side away from the fixed block.

[0015] As a preferred embodiment of the gas turbine intake heating device of the present invention, the shielding layer includes a first state and a second state. When the shielding layer is in the first state, the shielding layer is pressed by the fixed block and the movable block and is in a contracted state. When the shielding layer is in the second state, the shielding layer is stretched by the fixed block and the movable block and is in an unfolded state.

[0016] As a preferred embodiment of the gas turbine intake heating device of the present invention, the protrusion has a flow guiding cavity on the side facing the solution, and the flow guiding cavity connects the cavity and the heat exchange tube. An elastic diaphragm is installed inside the flow guiding cavity to realize unidirectional flow of the solution.

[0017] In a preferred embodiment of the gas turbine intake heating device of the present invention, a limiting groove is provided on the outer side of the drive ring, a limiting rod is slidably connected inside the limiting groove, and the limiting rod is fixedly connected to the marking shell.

[0018] The beneficial effects of the gas turbine intake heating device of the present invention are as follows: when the heat exchange tube is damaged and leaks liquid, the marking shell expands by absorbing liquid, thereby releasing the constraint on the sealing element and causing the sealing element to rotate. During the rotation of the sealing element, the solution in the cavity will be squeezed out, thereby changing the color of the display shell. Therefore, by observing whether the color of the display shell changes, the staff can quickly identify whether the heat exchange tube is damaged, which facilitates timely maintenance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 This is a partial structural diagram of the heat exchange tube of the gas turbine intake heating device in this invention.

[0021] Figure 2 This is a three-dimensional structural diagram of the heat exchange tube of the gas turbine intake heating device in this invention.

[0022] Figure 3 This is a cross-sectional perspective view of the marking component of the gas turbine intake heating device in this invention.

[0023] Figure 4 This is a cross-sectional front view of the marking component of the gas turbine intake heating device in this invention.

[0024] Figure 5 This is a front view schematic diagram of the snap-fit ​​block of the gas turbine intake heating device in this invention.

[0025] Figure 6 This is a three-dimensional structural diagram of the sealing component of the gas turbine intake heating device in this invention.

[0026] Figure 7 This is a schematic diagram of the unfolded structure of the shielding layer of the gas turbine intake heating device in this invention.

[0027] Figure 8 This is a cross-sectional view of the guide cavity of the gas turbine intake heating device in this invention.

[0028] In the picture:

[0029] 100. Heat exchanger body; 101. Heat exchange tube; 102. Connecting pipe;

[0030] 200. Marking component; 201. Marking shell; 202. Detection element; 203. Sealing element; 212. Snap-fit ​​block; 213. Force application layer;

[0031] 201a, drive ring; 201b, protrusion; 201c, compression spring;

[0032] 201a-1, Limiting groove; 201a-2, Limiting rod;

[0033] 201b-1, Flow guiding cavity; 201b-2, Elastic diaphragm;

[0034] 202a, Detection tube; 202b, Water-conducting layer;

[0035] 203a, Fixed block; 203b, Movable block; 203c, Shielding layer;

[0036] 300, Display housing; 301, Cavity. Detailed Implementation

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0039] 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 phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0040] Example 1

[0041] Reference Figure 1-5 This is the first embodiment of the present invention, which provides a gas turbine intake heating device, including a heat exchanger body 100, which includes a plurality of symmetrically arranged heat exchange tubes 101 and a connecting pipe 102 connecting the two ends of adjacent heat exchange tubes 101; a marking assembly 200, which includes a marking shell 201, a detection element 202 and a sealing element 203, wherein the marking shell 201 is installed at the connection between the heat exchange tubes 101 and the connecting pipe 102, the detection element 202 is installed below the heat exchange tubes 101 for detecting whether there is leakage, and the sealing element 203 is located inside the heat exchange tubes 101 and is driven to rotate by the detection element 202; and a display shell 300, which is installed on the outside of the marking shell 201 for marking whether the pipeline is leaking.

[0042] Specifically, when the heat exchange tube 101 is damaged and leaks liquid, the liquid will flow to the lower marking shell 201 under the action of gravity and be absorbed by the marking shell 201. Subsequently, the marking shell 201 expands by absorbing liquid, thereby releasing the constraint on the sealing member 203, causing the sealing member 203 to rotate. During the rotation of the sealing member 203, the solution in the cavity 301 will be squeezed out, thereby changing the color of the display shell 300. Therefore, by observing whether the color of the display shell 300 changes, the staff can quickly identify whether the heat exchange tube 101 is damaged, which is convenient for the staff to repair in a timely manner.

[0043] Furthermore, the marking shell 201 is connected to the heat exchange tube 101 and the connecting pipe 102 via flanges, and gaskets are installed between adjacent flanges. The connecting pipe 102 is bent to connect multiple individual heat exchange tubes 101 into a whole to form a heat exchange pipeline. The heat exchange tubes 101, marking assembly 200 and connecting pipe 102 are sealed and assembled by flanges, which facilitates the disassembly and installation of damaged heat exchange tubes 101. A drive ring 201a is rotatably connected inside the marking shell 201. Multiple protruding protrusions 201b are fixed on the outer periphery of the drive ring 201a. A compression spring 201c abuts between the drive ring 201a and the marking shell 201. The display shell 300 has multiple cavities 301 inside, which are filled with solution. The display shell 300 has observation windows at the positions corresponding to the cavities 301, and the drive ring 201a is located inside the cavity 301 to squeeze out the solution. Drive ring 201a rotates to a predetermined angle under the elastic force of compression spring 201c, causing multiple protrusions 201b to rotate. When the protrusions 201b move, they squeeze and discharge the solution. The solution is preferably a colored solution. Therefore, after the solution is discharged, the operator can observe the change in color of display shell 300 through the observation window. Detection element 202 includes detection tube 202a fixed to the bottom of heat exchange tube 101, and multiple detection holes are opened on the surface of detection tube 202a. Water guiding layer 202b is placed inside detection tube 202a. The detection element 202 includes a snap-fit ​​block 212 installed inside the marking shell 201, and a force-applying layer 213 abutting one side of the snap-fit ​​block 212. The force-applying layer 213 is connected to the water-conducting layer 202b. A slot is provided on the outside of the drive ring 201a to snap-fit ​​the snap-fit ​​block 212. When the heat exchange tube 101 itself is damaged and leaks liquid, the liquid will flow to the detection tube 202a under the action of gravity and be absorbed by the water-conducting layer 202b inside the detection tube 202a. The water-conducting layer 202b is preferably a water-absorbing fiber, which can absorb the liquid and guide the liquid to the force-applying layer 213. The force-applying layer 213 is preferably a water-absorbing and expanding particle. After the force-applying layer 213 absorbs water and expands, it pushes the snap-fit ​​block 212 to move. The snap-fit ​​block 212 separates from the slot on the drive ring 201a, so the drive ring 201a is released from constraint. A pull rope spring is fixedly connected between the snap-fit ​​block 212 and the marking shell 201.

[0044] The heat exchange tube 101, the marking assembly 200 and the connecting pipe 102 are sealed and assembled by the flange, which facilitates the disassembly and installation of the damaged heat exchange tube 101.

[0045] When the heat exchange tube 101 itself is damaged and leaks liquid, the liquid will flow to the detection tube 202a under the action of gravity and be absorbed by the water-conducting layer 202b inside the detection tube 202a. The water-conducting layer 202b is preferably a water-absorbing fiber, which can absorb the liquid and guide the liquid to the force-applying layer 213. The force-applying layer 213 is preferably a water-absorbing and expanding particle. After the force-applying layer 213 absorbs water and expands, it pushes the locking block 212 to move. The locking block 212 separates from the locking groove on the drive ring 201a, so the drive ring 201a is released from the constraint. The drive ring 201a will rotate to a predetermined angle under the elastic force of the compression spring 201c, which will drive multiple protrusions 201b to rotate. When the protrusions 201b move, they will squeeze and discharge the solution. The solution is preferably a colored solution. Therefore, after the solution is discharged, the staff can see the color change of the display shell 300 through the observation window, which serves as a mark for the damaged heat exchange tube 101, so that the staff can quickly repair the damaged heat exchange tube 101.

[0046] In addition, the elastic tension applied to the locking block 212 by the pull rope spring serves to constrain the locking block 212, so that the locking block 212 can stably fix the drive ring 201a to avoid the problem of false triggering.

[0047] Example 2

[0048] Reference Figure 4-7This is the second embodiment of the invention. Unlike the previous embodiment, it also includes a sealing component 203 comprising multiple fixed blocks 203a and movable blocks 203b distributed along the axis of the heat exchange tube 101. The fixed blocks 203a are fixed to the inner wall of the heat exchange tube 101, and the movable blocks 203b are slidably connected to the heat exchange tube 101. A shielding layer 203c is fixedly connected between the fixed blocks 203a and the movable blocks 203b. Both ends of the movable blocks 203b are fixedly connected to the drive ring 201a. An abutment groove is formed on the side of the fixed block 203a away from the movable block 203b, and an abutment block is fixed on the side of the movable block 203b away from the fixed block 203a. The abutment groove and abutment block increase the contact area and stability when the fixed blocks 203a and the movable blocks 203b are in contact. A sealing layer can be fixed at the abutment groove to prevent liquid leakage. The shielding layer 203c includes a first state and a second state. When the shielding layer 203c is in the first state, it is compressed by the fixed block 203a and the movable block 203b and is in a contracted state. When the shielding layer 203c is in the second state, it is stretched by the fixed block 203a and the movable block 203b and is in an unfolded state. When the drive ring 201a rotates, it will synchronously drive multiple movable blocks 203b to rotate. Multiple movable blocks 203b will abut against the adjacent fixed block 203a, and the movable blocks 203b will unfold the shielding layer 203c during rotation. Therefore, the shielding layer 203c will adhere to the inner wall of the heat exchange tube 101 under the action of liquid pressure, thus providing a temporary shielding effect for the damaged area.

[0049] As shown in Example 1, when the drive ring 201a rotates, it synchronously drives multiple movable blocks 203b to rotate. These movable blocks 203b abut against adjacent fixed blocks 203a, and during rotation, the movable blocks 203b unfold the shielding layer 203c. Therefore, under liquid pressure, the shielding layer 203c adheres to the inner wall of the heat exchange tube 101. At this point, the shielding layer 203c forms a flexible pipe, thus providing temporary shielding for any damage and effectively solving the problem of continuous liquid leakage. However, the unfolded shielding layer 203c affects heat exchange efficiency, requiring subsequent maintenance by personnel.

[0050] Secondly, the shielding layer 203c is compressed and contracted by the fixed block 203a and the movable block 203b in the first state, which can effectively reduce the impact on the flowing liquid.

[0051] The shielding layer 203c is made of elastic rubber material and has excellent extensibility.

[0052] In addition, the setting of the abutment groove and the abutment block makes the contact area larger and more stable when the fixed block 203a and the movable block 203b are attached, and a sealing layer can be fixed at the abutment groove to prevent liquid leakage.

[0053] Finally, multiple annular supports can be fixed inside the multiple movable blocks 203b, and the multiple movable blocks 203b can be connected into one unit by the multiple annular supports to improve the stability of the movable blocks 203b when rotating.

[0054] Example 3

[0055] Reference Figure 3-4 and Figure 7 This is the third embodiment of the present invention, which further provides a gas turbine intake heating device. It includes a flow guide cavity 201b-1 formed on the side of the protrusion 201b facing the solution, and the flow guide cavity 201b-1 connects the cavity 301 and the heat exchange tube 101. An elastic diaphragm 201b-2 is installed inside the flow guide cavity 201b-1 to achieve unidirectional flow of the solution.

[0056] As can be seen from Example 1, the pressure generated by the protrusion 201b when squeezing the solution through the opening of the flow guide cavity 201b-1 will open the elastic diaphragm 201b-2. Therefore, the solution will flow into the heat exchange tube 101 through the flow guide cavity 201b-1, thereby changing the color of the liquid itself. This allows the staff to understand whether the heat exchanger has been damaged by periodically observing the color of the heating medium.

[0057] The solution is aqueous, so it can be filtered through a microporous membrane and reused.

[0058] Furthermore, a limiting groove 201a-1 is formed on the outer side of the drive ring 201a, and a limiting rod 201a-2 is slidably connected inside the limiting groove 201a-1, and the limiting rod 201a-2 is fixedly connected to the marking shell 201. Through the cooperation of the limiting groove 201a-1 and the limiting rod 201a-2, the rotation angle of the drive ring 201a can be constrained, thereby preventing the moving block 203b from applying excessive impact force to the fixed block 203a and causing damage.

[0059] In summary, when the heat exchange tube 101 itself is damaged and leaks liquid, the liquid will flow to the detection tube 202a under the action of gravity and be absorbed by the water-conducting layer 202b inside the detection tube 202a. The water-conducting layer 202b is preferably a water-absorbing fiber, which can absorb the liquid and guide the liquid to the force-applying layer 213. The force-applying layer 213 is preferably a water-absorbing and expanding particle. After the force-applying layer 213 absorbs water and expands, it pushes the locking block 212 to move. The locking block 212 separates from the locking groove on the drive ring 201a, so the drive ring 201a... 1a Release the constraint, and the drive ring 201a will rotate to a predetermined angle under the elastic force of the compression spring 201c, causing multiple protrusions 201b to rotate. When the protrusions 201b move, they will squeeze and discharge the solution. The solution is preferably a colored solution. Therefore, after the solution is discharged, the staff can see the color change of the display shell 300 through the observation window, which serves as a mark for the damaged heat exchange tube 101, so that the staff can quickly repair the damaged heat exchange tube 101.

[0060] As described above, when the drive ring 201a rotates, it will synchronously drive multiple movable blocks 203b to rotate. The multiple movable blocks 203b will abut against the adjacent fixed blocks 203a, and the movable blocks 203b will unfold the shielding layer 203c during rotation. Therefore, the shielding layer 203c will adhere to the inner wall of the heat exchange tube 101 under the action of liquid pressure. At this time, the shielding layer 203c forms a flexible pipe, thus providing temporary shielding for the damaged area and effectively solving the problem of continuous liquid leakage. Through the opened guide cavity 201b-1, the pressure generated by the protrusion 201b when squeezing the solution will open the elastic diaphragm 201b-2. Therefore, the solution will flow into the heat exchange tube 101 through the guide cavity 201b-1, thereby changing the color of the liquid itself. This allows the staff to understand whether the heat exchanger has been damaged by periodically observing the color of the heating medium.

[0061] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, variations in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​such as temperature, pressure, etc., installation arrangements, use of materials, color, orientation, etc. For instance, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure performing the function described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0062] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0063] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A gas turbine intake air heating device, characterized in that: include, The heat exchanger body (100) includes a plurality of symmetrically arranged heat exchange tubes (101) and a connecting pipe (102) connecting the two ends of adjacent heat exchange tubes (101). The marking assembly (200) includes a marking shell (201), a detection element (202), and a sealing element (203). The marking shell (201) is installed at the connection between the heat exchange tube (101) and the connecting pipe (102). The detection element (202) is installed below the heat exchange tube (101) to detect whether there is leakage. The sealing element (203) is located inside the heat exchange tube (101) and is driven to rotate by the detection element (202). Display housing (300), which is installed on the outside of the marking housing (201) for marking whether the pipeline is leaking; The marking shell (201) is rotatably connected to a drive ring (201a). The drive ring (201a) has a plurality of protruding protrusions (201b) fixed on its outer periphery. A compression spring (201c) abuts between the drive ring (201a) and the marking shell (201). The display housing (300) has multiple cavities (301) inside, each cavity (301) is filled with a solution, and the display housing (300) has an observation window at the position corresponding to the cavity (301). The drive ring (201a) is located inside the cavity (301) and is used to squeeze out the solution. The detection element (202) includes a detection tube (202a) fixed to the bottom of the heat exchange tube (101), and the surface of the detection tube (202a) is provided with a plurality of detection holes, and a water-conducting layer (202b) is placed inside the detection tube (202a). The detection component (202) includes a snap-fit ​​block (212) installed inside the marking shell (201), and a force-applying layer (213) abuts against one side of the snap-fit ​​block (212). The force-applying layer (213) is connected to the water-guiding layer (202b). A snap-fit ​​groove is opened on the outside of the drive ring (201a) to snap-fit ​​the snap-fit ​​block (212). A pull rope spring is fixedly connected between the snap-fit ​​block (212) and the marking shell (201). The protrusion (201b) has a flow guide cavity (201b-1) on the side facing the solution, and the flow guide cavity (201b-1) connects the cavity (301) and the heat exchange tube (101). An elastic diaphragm (201b-2) is installed inside the flow guide cavity (201b-1) to realize the unidirectional flow of the solution.

2. The gas turbine intake heating device as described in claim 1, characterized in that: The marking shell (201) is connected to the heat exchange tube (101) and the connecting pipe (102) respectively through flanges, and gaskets are installed between adjacent flanges. The connecting pipe (102) is bent to connect multiple individual heat exchange tubes (101) into a whole to form a heat exchange pipeline.

3. The gas turbine intake heating device as described in claim 2, characterized in that: The sealing component (203) includes a plurality of fixed blocks (203a) and movable blocks (203b) distributed along the axial direction of the heat exchange tube (101). The fixed blocks (203a) are fixed to the inner wall of the heat exchange tube (101), and the movable blocks (203b) are slidably connected to the heat exchange tube (101). A shielding layer (203c) is fixedly connected between the fixed blocks (203a) and the movable blocks (203b). Both ends of the movable blocks (203b) are fixedly connected to the drive ring (201a).

4. The gas turbine intake air heating device as described in claim 3, characterized in that: The fixed block (203a) has an abutment groove on the side away from the movable block (203b), and the movable block (203b) has an abutment block fixed on the side away from the fixed block (203a).

5. The gas turbine intake air heating device as described in claim 4, characterized in that: The shielding layer (203c) includes a first state and a second state. When the shielding layer (203c) is in the first state, the shielding layer (203c) is pressed by the fixed block (203a) and the movable block (203b) and is in a contracted state. When the shielding layer (203c) is in the second state, the shielding layer (203c) is stretched by the fixed block (203a) and the movable block (203b) and is in an unfolded state.

6. The gas turbine intake air heating device as described in claim 5, characterized in that: A limiting groove (201a-1) is provided on the outer side of the drive ring (201a), and a limiting rod (201a-2) is slidably connected inside the limiting groove (201a-1), and the limiting rod (201a-2) is fixedly connected to the marking shell (201).

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