Ignition rods for heavy-duty gas turbines and gas turbines

Abstract

This utility model provides an ignition rod and a gas turbine for a heavy-duty gas turbine, relating to the field of gas turbine technology. It includes a head and a tail, with the head connected to the tail. One end of the tail, away from the head, is adapted to connect to the ignition cable of the gas turbine. The head includes a first conductive core, a first insulating sleeve, and a first outer shell, sequentially arranged from the inside out. The head also includes a discharge ring, which fits inside the first outer shell and is fitted onto the first conductive core. The discharge ring and the first insulating sleeve are arranged along the axial direction of the ignition rod, with the discharge ring being closer to the ignition end of the ignition rod than the first insulating sleeve. There are at least two first insulating sleeves, all of which are sequentially inserted along the axial direction of the ignition rod. An expansion joint is provided at the connection point of any two adjacent first insulating sleeves. The head of this utility model has good insulation, ensuring ignition performance.

Description

Technical Field

[0001] This utility model relates to the field of gas turbine technology, and in particular to an ignition rod for a heavy-duty gas turbine and a gas turbine. Background Technology

[0002] Ignition of a heavy-duty gas turbine is the first step in the hot commissioning and operation of the unit, and the reliability of ignition directly affects the reliable operation of the unit. Due to design differences, the ignition methods of each unit are different. For example, the Siemens 4000F annular combustor uses 20 burners at the head for ignition, while the GE and Mitsubishi 9F gas turbines use two combustors at the top. The 300MW gas turbine, which does not have a flame tube, requires 14 combustors for ignition. In addition, due to differences in the structure of the combustors, the ignition rods of each gas turbine need to be specially customized.

[0003] However, the ignition rods in related technologies have problems such as easy burning of the head, poor insulation performance, and difficulty in maintenance during actual use. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, one embodiment of this utility model provides an ignition rod for a heavy-duty gas turbine, the head of which has good insulation to ensure ignition performance.

[0006] Another embodiment of this utility model proposes a gas turbine.

[0007] An ignition rod for a heavy-duty gas turbine according to an embodiment of the present invention includes a head and a tail, the head being connected to the tail, and the end of the tail facing away from the head being adapted to be connected to the ignition cable of the gas turbine; the head includes a first conductive core, a first insulating sleeve, and a first outer shell sequentially arranged from the inside to the outside, and the head also includes a discharge ring, which is fitted inside the first outer shell and sleeved on the first conductive core, the discharge ring and the first insulating sleeve being arranged along the axial direction of the ignition rod, the discharge ring being closer to the ignition end of the ignition rod than the first insulating sleeve; there are at least two first insulating sleeves, all of which are sequentially inserted along the axial direction of the ignition rod, and an expansion joint is provided at the connection point of any two adjacent first insulating sleeves.

[0008] According to an embodiment of the present invention, the ignition rod for a heavy-duty gas turbine comprises a first conductive core, a first insulating sleeve, a first outer shell, and a discharge ring, forming the head of the ignition rod. The first conductive core is equivalent to the positive electrode, the first outer shell to the negative electrode, and the discharge ring to the positive and negative electrode pathway. An electric spark is generated on the discharge ring. Since there are at least two first insulating sleeves, and an expansion joint is present at the connection between any two adjacent first insulating sleeves, the expansion joint allows for a certain amount of deformation between any two adjacent first insulating sleeves when the head temperature exceeds a set value, ensuring that the head insulation does not fail. Therefore, compared to related technologies, the head of the present invention has good insulation properties, guaranteeing ignition performance.

[0009] In some embodiments, one of any two adjacent first insulating sleeves has a protrusion on its end face and a groove on its end face, the protrusion fitting into the groove, and the expansion joint being formed between the protrusion and the groove;

[0010] The expansion joint includes a first segment and a second segment connected to each other. The first segment is defined between the outer peripheral surface of the protrusion and the inner peripheral surface of the groove, and the second segment is defined between the end face of the protrusion and the bottom surface of the groove.

[0011] In some embodiments, the distance between the outer peripheral surface of the protrusion and the inner peripheral surface of the groove is s1, and 0mm < s1 ≤ 1mm.

[0012] In some embodiments, the distance between the protruding end face and the bottom surface of the groove is s2, and 2mm≤s2≤3mm.

[0013] In some embodiments, at least one of the first conductive cell and the first housing is filled with a high-temperature resistant insulating sealant between itself and the first insulating sleeve.

[0014] In some embodiments, the expansion joint between any two adjacent first insulating sleeves is filled with high-temperature resistant insulating sealant.

[0015] In some embodiments, the first insulating sleeve is an insulating ceramic bead.

[0016] In some embodiments, the discharge ring is a semiconductor discharge ring.

[0017] In some embodiments, the tail portion includes a second conductive battery cell, a second insulating sleeve, and a second outer shell, which are sequentially sleeved from the inside to the outside.

[0018] The first conductive cell is made of high-temperature resistant alloy steel, and the second conductive cell is made of copper or copper alloy.

[0019] In some embodiments, the end of the tail portion opposite to the head is adapted to be threadedly connected to the ignition cable of the gas turbine.

[0020] In some embodiments, the head and the tail are detachably connected.

[0021] In some embodiments, the ignition rod further includes a middle portion connecting the head and the tail, wherein at least one of the head and the tail is detachably connected to the middle portion.

[0022] In some embodiments, the ignition rod further includes an auxiliary disassembly ring, which is sleeved on the middle portion and is used for detachable connection with the gas turbine.

[0023] According to an embodiment of the present invention, a gas turbine includes the ignition rod described in any of the above embodiments.

[0024] According to the gas turbine of this utility model embodiment, the ignition rod is designed with a head insulation structure to ensure ignition performance. Therefore, compared with related technologies, the gas turbine using this ignition rod can improve ignition reliability.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of an ignition rod for a heavy-duty gas turbine according to an embodiment of the present invention.

[0027] Figure 2 yes Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0028] Figure label:

[0029] 1. Head; 11. First conductive cell; 12. First insulating sleeve; 121. Protrusion; 122. Groove; 13. First outer shell; 131. Positioning boss; 14. Discharge ring; 15. Expansion joint; 151. First section; 152. Second section;

[0030] 2. Tail end; 21. Second conductive cell; 22. Second insulating sleeve; 23. Second outer casing;

[0031] 3. Middle section; 31. Third conductive cell; 32. Third insulating sleeve; 33. Third outer casing;

[0032] 4. Auxiliary disassembly and assembly ring. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] like Figure 1 As shown, an ignition rod for a heavy-duty gas turbine according to an embodiment of the present invention includes a head 1 and a tail 2. The head 1 is connected to the tail 2, and the end of the tail 2 away from the head 1 is adapted to be connected to the ignition cable of the gas turbine. The head 1 includes a first conductive core 11, a first insulating sleeve 12, and a first outer shell 13 arranged sequentially from the inside to the outside. The head 1 also includes a discharge ring 14, which is fitted inside the first outer shell 13 and sleeved on the first conductive core 11. The discharge ring 14 and the first insulating sleeve 12 are arranged along the axial direction of the ignition rod, and the discharge ring 14 is closer to the ignition end of the ignition rod than the first insulating sleeve 12. There are at least two first insulating sleeves 12, and all the first insulating sleeves 12 are inserted sequentially along the axial direction of the ignition rod. The connection between any two adjacent first insulating sleeves 12 has an expansion joint 15. When the temperature of the head 1 is greater than a set value, any first insulating sleeve 12 can deform to shrink or seal the expansion joint 15 together with the adjacent first insulating sleeve 12.

[0035] According to an embodiment of the present invention, the ignition rod for a heavy-duty gas turbine is formed by the cooperation of a first conductive core 11, a first insulating sleeve 12, a first outer shell 13, and a discharge ring 14 to form the head 1 of the ignition rod. The first conductive core 11 is equivalent to the positive electrode, the first outer shell 13 is equivalent to the negative electrode, and the discharge ring 14 is equivalent to the passage between the positive and negative electrodes. The electric spark is generated on the discharge ring 14. Since there are at least two first insulating sleeves 12, and there is an expansion joint 15 at the connection between any two adjacent first insulating sleeves 12, when the temperature of the head 1 is greater than a set value, the existence of the expansion joint 15 allows a certain amount of deformation between any two adjacent first insulating sleeves 12 to ensure that the insulation of the head 1 does not fail. Therefore, compared with related technologies, the head of the present invention has good insulation and can ensure ignition performance.

[0036] Understandably, in related technologies, the insulating sleeve is a single piece. When the temperature at the head 1 of the ignition rod exceeds the set value, the single insulating sleeve is prone to breakage, leading to leakage at the crack. However, this utility model adopts a structural design in which at least two first insulating sleeves 12 are inserted into each other, and the connection between any two adjacent first insulating sleeves 12 has an expansion joint 15. This design allows the first insulating sleeves 12 to be movable, allowing a certain amount of deformation while ensuring that the insulation does not fail.

[0037] Specifically, the first outer casing 13 can be a steel pipe, such as the Φ16 steel pipe shown in the figure. The two end faces of the discharge ring 14 can respectively press against the inner cavities of the first insulating sleeve 12 and the first outer casing 13. For example, as shown in the figure, the inner cavity of the first outer casing 13 has a positioning boss 131, and the end of the discharge ring 14 facing away from the first insulating sleeve 12 abuts against the positioning boss 131. The axial direction of the ignition rod can be the left-right direction shown in the figure.

[0038] It should be noted that the length of the first insulating sleeve 12 can be designed according to the specifications and temperature resistance of the ignition rod, so as to ensure that the first insulating sleeve 12 is not easily broken when the temperature of the head 1 of the ignition rod is greater than the set value. This will not be elaborated further here.

[0039] like Figure 1 and Figure 2 As shown, in some embodiments, one of any two adjacent first insulating sleeves 12 has a protrusion 121 on its end face and a groove 122 on its end face. The protrusion 121 fits into the groove 122, and an expansion joint 15 is formed between the protrusion 121 and the groove 122. The fit between the protrusion 121 and the groove 122 can realize the insertion between any two adjacent first insulating sleeves 12 and facilitates the positioning and assembly between the two.

[0040] The expansion joint 15 includes a first segment 151 and a second segment 152 connected to each other. The first segment 151 is defined between the outer peripheral surface of the protrusion 121 and the inner peripheral surface of the groove 122. In other words, the first segment 151 allows the first insulating sleeve 12 to deform radially along the ignition rod. The second segment 152 is defined between the end face of the protrusion 121 and the bottom surface of the groove 122. In other words, the second segment 152 allows the first insulating sleeve 12 to deform axially along the ignition rod. Therefore, the existence of the expansion joint 15 allows the first insulating sleeve 12 to deform to a certain extent to ensure insulation performance.

[0041] Specifically, the radial direction of the ignition rod can be the up-down direction as shown in the figure. The protrusion 121 and the groove 122 can be coaxially fitted, in which case the distance between the outer peripheral surface of the protrusion 121 and the inner peripheral surface of the groove 122 is equal everywhere.

[0042] like Figure 1 and Figure 2 As shown, in some embodiments, the distance between the outer peripheral surface of the protrusion 121 and the inner peripheral surface of the groove 122 is s1, and 0mm < s1 ≤ 1mm. Here, s1 can be, for example, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0043] like Figure 1 and Figure 2 As shown, in some embodiments, the distance between the end face of the protrusion 121 and the bottom face of the groove 122 is s2, and 2mm≤s2≤3mm. Here, s2 can be, for example, 2mm, 2.2mm, 2.4mm, 2.5mm, 2.6mm, 2.8mm, 3mm, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0044] It is understandable that by adopting the above parameter design, it can be ensured that the expansion joint 15 can be adapted to a certain amount of deformation of the first insulating sleeve 12, thereby ensuring the insulation performance of the head 1.

[0045] Furthermore, the sum of the lengths of the second segments 152 of all expansion joints 15 is no greater than 10mm, wherein the length of the second segment 152 of the expansion joint 15 is the distance s2 between the end face of the protrusion 121 and the bottom face of the groove 122, so as to ensure the structural performance of the ignition rod.

[0046] like Figure 1 As shown, in some embodiments, at least one of the first conductive cell 11 and the first outer casing 13 is filled with a high-temperature resistant insulating sealant (not shown in the figure) between itself and the first insulating sleeve 12. In other words, a high-temperature resistant insulating sealant is filled between the outer peripheral surface of the first conductive cell 11 and the inner peripheral surface of the first insulating sleeve 12; or, a high-temperature resistant insulating sealant is filled between the inner peripheral surface of the first outer casing 13 and the outer peripheral surface of the first insulating sleeve 12; or, a high-temperature resistant insulating sealant is filled between the outer peripheral surface of the first conductive cell 11 and the inner peripheral surface of the first insulating sleeve 12, and between the inner peripheral surface of the first outer casing 13 and the outer peripheral surface of the first insulating sleeve 12.

[0047] like Figure 1 As shown, in some embodiments, the expansion joint 15 of any two adjacent first insulating sleeves 12 is filled with high-temperature resistant insulating sealant (not shown in the figure).

[0048] It is understandable that by injecting high-temperature resistant insulating sealant between the outer peripheral surface of the first conductive cell 11 and the inner peripheral surface of the first insulating sleeve 12, between the inner peripheral surface of the first outer shell 13 and the outer peripheral surface of the first insulating sleeve 12, and between the expansion joints 15 of any two adjacent first insulating sleeves 12, the sealing, insulation and high-temperature resistance of the head 1 of the ignition rod can be further improved.

[0049] For example, during assembly, high-temperature resistant insulating sealant can be applied between the first conductive cell 11 and the first insulating sleeve 12 in the head 1, as well as on the outer circumferential surface of the first insulating sleeve 12. Then, the aforementioned part can be inserted into the first outer shell 13 as a whole, and after it has cured, it can be tightened with the tail 2 part.

[0050] like Figure 1As shown, in some embodiments, the first insulating sleeve 12 is an insulating ceramic bead. The insulating ceramic bead is a ceramic component that is resistant to high temperature and has high insulation. It can effectively isolate the first conductive cell 11 from the first outer shell 13, and has the functions of preventing short circuits and resisting high voltage. It is also resistant to acids and alkalis, anti-aging, and has high mechanical strength.

[0051] like Figure 1 As shown, in some embodiments, the discharge ring 14 is a semiconductor discharge ring, which has advantages such as resistance to carbon buildup, high temperature resistance, resistance to moisture / oil, long lifespan, and high spark energy.

[0052] It is understandable that, based on the above structure, the head 1 of the ignition rod is designed to include multiple insulating ceramic beads, a semiconductor discharge ring, and a structure filled with high-temperature resistant insulating sealant. This achieves high-temperature resistance treatment of the head 1, resulting in high insulation strength of the head 1 at high temperatures, which can significantly improve its operating temperature tolerance.

[0053] like Figure 1 As shown, in some embodiments, the tail portion 2 includes a second conductive core 21, a second insulating sleeve 22, and a second outer shell 23, which are sequentially fitted from the inside to the outside. The second outer shell 23 may be, for example, a Φ18 steel pipe.

[0054] The first conductive cell 11 is made of high-temperature resistant alloy steel, and the second conductive cell 21 is made of copper or copper alloy.

[0055] It is understandable that designing the first conductive cell 11 as a high-temperature resistant alloy steel cell can further ensure the high-temperature resistance of the head 1. At the same time, compared with the conductive cells of the ignition rod (including the first conductive cell 11 and the second conductive cell 21) which are made of high-temperature resistant alloy steel and have a larger resistance, the conductive cells of this utility model can maintain conductivity and discharge performance.

[0056] like Figure 1 As shown, in some embodiments, the end of the tail 2 opposite to the head 1 is adapted to be threadedly connected to the ignition cable of the gas turbine, so as to facilitate the disassembly and maintenance of the ignition rod and the ignition cable of the gas turbine.

[0057] Specifically, the end of the second outer casing 23 of the tail section 2 that is away from the first outer casing 13 may have an external thread, and the ignition cable of the gas turbine is connected to the external thread on the second outer casing 23.

[0058] like Figure 1 As shown, in some embodiments, the head 1 and the tail 2 are detachably connected to facilitate the disassembly and replacement of the head 1 and the tail 2. If either of the connected parts fails, only the corresponding damaged part needs to be replaced to enable the ignition rod to work normally, without having to scrap the entire ignition rod, thus effectively reducing the maintenance cost of the ignition rod.

[0059] Specifically, the first conductive cell 11 and the second conductive cell 21, as well as the first insulating sleeve 12 and the second insulating sleeve 22, can be connected by connectors. The first outer shell 13 and the second outer shell 23 can be connected by threads.

[0060] like Figure 1 As shown, in some embodiments, the ignition rod further includes a middle portion 3, which connects the head 1 and the tail 2. At least one of the head 1 and the tail 2 is detachably connected to the middle portion 3 to further improve the disassembly and assembly performance of the ignition rod, which is beneficial for assembly and subsequent maintenance. Similarly, the middle portion 3 may also include a third conductive cell 31, a third insulating sleeve 32, and a third outer shell 33, which are sequentially sleeved from the inside out.

[0061] It should be noted that whether the ignition rod includes the middle part 3 can be designed according to the specifications of the ignition rod and actual needs, and no specific limitation is made here.

[0062] like Figure 1 As shown, in some embodiments, the ignition rod also includes an auxiliary disassembly ring 4, which is sleeved on the middle part 3. The auxiliary disassembly ring 4 is used to detachably connect to the gas turbine so as to facilitate the disassembly and assembly of the ignition rod and the gas turbine.

[0063] Specifically, the auxiliary disassembly ring 4 is fitted onto the third outer shell 33 and welded to the third outer shell 33.

[0064] Therefore, compared with related technologies, this utility model has the following technical advantages:

[0065] 1) This utility model is easy to maintain, and the internal insulation and conductive materials of the head 1, tail 2, and ignition rod can be disassembled and replaced;

[0066] 2) The head 1 of this utility model has undergone high temperature resistance treatment, which can significantly improve the working temperature resistance.

[0067] 3) This utility model has high insulation strength at high temperatures.

[0068] In other words, this utility model mainly solves technical problems such as the reliability of ignition rod, the high temperature resistance of head 1, and the reliability of electrical insulation.

[0069] It should be noted that this invention can stably ignite under an excitation voltage of 1000-3000V, has a long-term working temperature of ≥800℃, does not degrade its ignition performance at high temperatures, has a withstand voltage rating of ≥3MPa, and has an insulation strength of ≥1MΩ at room temperature.

[0070] This invention is applicable to domestically produced 300MW heavy-duty gas turbines, significantly improving the ignition reliability of the gas turbine and reducing the cost per unit by more than 60%. It can also be modified to meet the size requirements of other models.

[0071] A gas turbine (not shown in the figure) according to an embodiment of the present invention includes an ignition rod of any of the above embodiments.

[0072] According to the gas turbine of this utility model embodiment, the ignition rod is designed with a head 1 having strong insulation performance, which can ensure ignition performance. Therefore, compared with related technologies, the gas turbine using this ignition rod can improve ignition reliability.

[0073] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0076] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0077] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An ignition rod for a heavy-duty gas turbine, characterized in that, include: head; The tail section is connected to the head section, and the end of the tail section opposite to the head section is adapted to be connected to the ignition cable of the gas turbine. The head includes a first conductive cell, a first insulating sleeve, and a first outer shell, which are sequentially sleeved from the inside to the outside. The head also includes a discharge ring, which is fitted inside the first outer shell and sleeved on the first conductive cell. The discharge ring and the first insulating sleeve are arranged along the axial direction of the ignition rod, and the discharge ring is closer to the ignition end of the ignition rod than the first insulating sleeve. There are at least two first insulating sleeves, and all the first insulating sleeves are inserted sequentially along the axial direction of the ignition rod, with an expansion joint at the connection of any two adjacent first insulating sleeves.

2. The ignition rod for a heavy-duty gas turbine according to claim 1, characterized in that, One of any two adjacent first insulating sleeves has a protrusion on its end face and a groove on its end face. The protrusion fits into the groove, and the expansion joint is formed between the protrusion and the groove. The expansion joint includes a first segment and a second segment connected to each other. The first segment is defined between the outer peripheral surface of the protrusion and the inner peripheral surface of the groove, and the second segment is defined between the end face of the protrusion and the bottom surface of the groove.

3. The ignition rod for a heavy-duty gas turbine according to claim 2, characterized in that, The distance between the outer peripheral surface of the protrusion and the inner peripheral surface of the groove is s1, and 0mm < s1 ≤ 1mm; and / or, The distance between the protruding end face and the bottom surface of the groove is s2, and 2mm≤s2≤3mm.

4. The ignition rod for a heavy-duty gas turbine according to claim 1, characterized in that, At least one of the first conductive cell and the first outer casing is filled with high-temperature resistant insulating sealant between itself and the first insulating sleeve; and / or, The expansion joint between any two adjacent first insulating sleeves is filled with high-temperature resistant insulating sealant.

5. The ignition rod for a heavy-duty gas turbine according to claim 1, characterized in that, The first insulating sleeve is an insulating ceramic bead; and / or, The discharge ring is a semiconductor discharge ring.

6. The ignition rod for a heavy-duty gas turbine according to claim 1, characterized in that, The tail section includes a second conductive battery core, a second insulating sleeve, and a second outer shell, which are sequentially fitted from the inside out. The first conductive cell is made of high-temperature resistant alloy steel, and the second conductive cell is made of copper or copper alloy.

7. The ignition rod for a heavy-duty gas turbine according to claim 1, characterized in that, The head and the tail are detachably connected.

8. The ignition rod for a heavy-duty gas turbine according to any one of claims 1-7, characterized in that, It also includes a middle section that connects the head and the tail, at least one of the head and the tail being detachably connected to the middle section.

9. The ignition rod for a heavy-duty gas turbine according to claim 8, characterized in that, It also includes an auxiliary disassembly ring, which is sleeved on the middle part and is used to detachably connect to the gas turbine.

10. A gas turbine, characterized in that, The gas turbine includes the ignition rod according to any one of claims 1-9.

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