Exhaust temperature probe for heavy duty gas turbine

Abstract

The present invention relates to an exhaust temperature probe for a heavy duty gas turbine, comprising: a sleeve mounted at the exhaust end of the gas turbine; the exhaust temperature element comprises a probe wire, a connecting piece and a shockproof module, one end of the probe wire is arranged in the sleeve, the other end of the probe wire is connected with the connecting piece, and the connecting piece is detachably connected with the sleeve; and the shockproof module is mounted on the probe wire and expands at high temperature to be in contact with the inner wall of the sleeve. The anti-vibration modules are additionally arranged on the exhaust temperature element and are uniformly distributed on the exhaust temperature element, so that the exhaust temperature element and the inner sleeve can be ensured to be stable, the vibration phenomenon is avoided, and the element damage rate is reduced. The method can be used for most gas turbine exhaust temperature elements, and has universality; meanwhile, replacement is convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of gas turbines and relates to an exhaust gas temperature probe for a heavy-duty gas turbine. Background Art

[0002] Gas turbines are important equipment in power generation systems. Currently, there are only a few 9H gas turbines in China. The 9H gas turbine uses a premixed combustion mode. Due to the high combustion temperature in the combustion chamber, which usually reaches a high temperature of more than 600 degrees, a circle of exhaust temperature probes are installed from the exhaust section to the waste heat boiler to indirectly monitor the combustion chamber temperature. When the monitored exhaust temperature dispersion is too high, it can be considered that there is a fault in the combustion chamber or a single unit, which will directly jump the gas turbine and cut off the fuel, which will affect the normal operation of the gas unit and also reduce the service life of the gas turbine.

[0003] Since the exhaust temperature probe is in a high temperature environment and vibrates greatly all year round, the damage rate is high. Therefore, power generation manufacturers often need to remove the exhaust temperature probe for inspection during each overhaul and daily shutdown. In addition, the exhaust temperature element is a thermocouple element. Although the voltage itself is very low, it also contains metal components, which may produce sparks and other phenomena in extreme cases. However, since the exhaust temperature of the gas turbine contains incompletely burned natural gas and hydrogen in the hydrogen cooling device of the unit generator, the components require a high explosion-proof grade. The normal temperature element output wire is generally connected with a terminal block, which is troublesome to disassemble and assemble, and there is a risk of flammability and explosion. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects in the prior art and provide a new type of shock-resistant temperature element to solve the problem that the exhaust temperature probe of the gas turbine is often damaged.

[0005] An exhaust gas temperature probe for a heavy-duty gas turbine, comprising

[0006] The sleeve is installed at the exhaust end of the gas turbine;

[0007] The exhaust temperature element includes a probe line, a connector, and a shockproof module. One end of the probe line is arranged in a sleeve, and the other end of the probe line is connected to the connector. The connector and the sleeve are detachably connected. The shockproof module is installed on the probe line and expands under high temperature to contact the inner wall of the sleeve.

[0008] Furthermore, the connecting piece and the probe line are formed in one piece.

[0009] Furthermore, the end of the sleeve close to the connecting piece is a threaded structure, and the connecting piece and the sleeve are detachably connected by threads; the outer wall of the end of the connecting piece away from the sleeve is a hexagonal structure.

[0010] Furthermore, it also includes an explosion-proof plug, which includes a male head and a female head. The probe line is arranged at an extension line at one end outside the sleeve and connected to the male head. The male head is provided with a plug, and the female head is provided with a jack. The male head and the female head are connected through the plug and the jack.

[0011] Furthermore, the explosion-proof plug also includes a threaded sleeve, which can be rotatably sleeved on the male head, and the outer wall of the female head is provided with threads. After the male head is inserted into the socket of the female head through the plug, the threaded sleeve is rotated to be connected to the female head through threads.

[0012] Furthermore, the length of the sleeve is 532 mm, and the diameter of the sleeve part is 38 mm.

[0013] Furthermore, the shockproof module includes a first module and a second module, the first module is a cylindrical structure, and the diameter of the cylindrical structure is 38 mm and the height is 21 mm; the second module is a truncated cone structure, and the height of the truncated cone structure is 21 mm, the diameter of one end is 38 mm, and the diameter of the other end is 32-36 mm.

[0014] Furthermore, the number of the first modules is 1-3, and the first modules are installed on the probe line at one end close to the connector; the number of the second modules is 3-8, and the second modules are installed on the probe line at one end away from the connector.

[0015] Furthermore, the first module and the second module are installed on the probe line at equal intervals; one first module is provided, and five second modules are provided.

[0016] Furthermore, an observation hole is provided on the outer wall of the sleeve at one end away from the connecting piece.

[0017] The advantages and beneficial effects of the present invention are:

[0018] (1) By adding a shockproof module to the exhaust temperature element, the shockproof modules are evenly distributed on the exhaust temperature element, which can ensure that the exhaust temperature element can be firmly connected to the inner sleeve, so that vibration does not occur and the element damage rate is reduced. The present invention can be used on most gas turbine exhaust temperature elements, has universality, and is easy to replace.

[0019] (2) The exhaust temperature element is detachably connected to the sleeve, which facilitates the disassembly of the exhaust temperature element and improves maintenance efficiency.

[0020] (3) The second module is truncated into a cone shape for easy insertion or extraction; and the end with a smaller diameter is arranged away from the first module. In addition, the first module and the second module will expand when the temperature rises, thereby reducing heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of an exhaust gas temperature probe for a heavy-duty gas turbine provided by the present invention;

[0022] Figure 2 A schematic diagram of the disassembled structure of an exhaust temperature probe for a heavy-duty gas turbine provided by the present invention;

[0023] Figure 3 It is a schematic diagram of the sleeve structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the exhaust temperature element of the present invention;

[0025] Figure 5 This is a schematic diagram of the connection structure between the probe line and the explosion-proof plug;

[0026] Figure 6 This is a schematic diagram of the male connector structure;

[0027] Figure 7 This is a schematic diagram of the female connector structure;

[0028] Figure 8 It is a schematic diagram of the connection structure between the exhaust temperature element and the explosion-proof plug.

[0029] Description of reference numerals:

[0030] Sleeve 1, exhaust temperature element 2, observation hole 11, probe line 21, connector 22, male head 23, female head 24, threaded sleeve 25, first module 26, second module 27, plug 231, jack 241. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] like Figure 1-8 As shown, an exhaust gas temperature probe for a heavy-duty gas turbine comprises

[0034] Sleeve 1, installed at the exhaust end of the gas turbine;

[0035] The exhaust temperature element 2 includes a probe line 21, a connector 22, and a shockproof module. One end of the probe line 21 is arranged in the sleeve 1, and the other end of the probe line 21 is connected to the connector 22. The connector 22 is detachably connected to the sleeve 1; the shockproof module is installed on the probe line 21, and expands under high temperature to contact the inner wall of the sleeve 1.

[0036] In the above technical solution, by adding a shockproof module to the exhaust temperature element, the shockproof modules are evenly distributed on the exhaust temperature element, which can ensure that the exhaust temperature element can be firmly fixed to the inner sleeve so that vibration does not occur and the damage rate of the element is reduced. The present invention can be used on most gas turbine exhaust temperature elements and has universality; it is also easy to replace. The exhaust temperature element is detachably connected to the sleeve, which facilitates the disassembly of the exhaust temperature element and improves maintenance efficiency. In addition, the shockproof module will expand slightly at high temperatures and contact the inner wall of the sleeve 1, which can have a sealing effect. In addition, Figure 1-5 In the diagram, the breakpoint on the probe line means the extension line.

[0037] As a preferred embodiment of the above technical solution, the connector 22 and the probe line 21 are integrally formed.

[0038] As a preferred embodiment of the above technical solution, the end of the sleeve 1 close to the connecting piece 22 is a threaded structure, and the connecting piece 22 and the sleeve 1 are detachably connected by threads; the outer wall of the end of the connecting piece 22 away from the sleeve 1 is a hexagonal structure.

[0039] In the above technical solution, the left side of the connecting piece 22 is an external thread structure, and the right side is a hexagonal structure, which is convenient for board installation.

[0040] As a preferred embodiment of the above technical solution, it also includes an explosion-proof plug, which includes a male head 23 and a female head 24. The probe line is arranged at an extension line at one end outside the sleeve and is connected to the male head 23. A plug 231 is arranged in the male head 23, and a socket 241 is arranged in the female head 24. The male head 23 and the female head 24 are connected through the plug 231 and the socket 241.

[0041] As a preferred embodiment of the above technical solution, the explosion-proof plug also includes a threaded sleeve 25, which can be rotatably sleeved on the male head 23, and the outer wall of the female head 24 is provided with threads. After the male head 23 is inserted into the socket 241 of the female head 24 through the plug 231, the threaded sleeve 25 is rotated to connect the threaded sleeve 25 to the female head 24 through threads.

[0042] As a preferred embodiment of the above technical solution, the length of the sleeve 1 is 532 mm, and the diameter of the sleeve 1 part is 38 mm.

[0043] As a preferred embodiment of the above technical solution, the shockproof module includes a first module 26 and a second module 27. The first module 26 is a cylindrical structure with a diameter of 38 mm and a height of 21 mm. The second module 27 is a truncated cone structure with a height of 21 mm, a diameter of 38 mm at one end and a diameter of 32-36 mm at the other end. The first module and the second module are made of 316 stainless steel.

[0044] In the above technical solution, the second module is truncated into a cone shape for easy insertion or extraction, and the end with a smaller diameter is arranged away from the first module. In addition, the first module and the second module will expand when the temperature rises, thereby reducing heat loss.

[0045] As a preferred embodiment of the above technical solution, there are 1-3 first modules 26, and the first module 26 is installed on the probe line 21 at one end close to the connector 22; there are 3-8 second modules 27, and the second module 27 is installed on the probe line 21 at one end away from the connector 22.

[0046] As a preferred embodiment of the above technical solution, the first module 26 and the second module 27 are installed on the probe line 21 at equal intervals; one first module 26 is provided, and five second modules 27 are provided.

[0047] As a preferred embodiment of the above technical solution, an observation hole 11 is provided on the outer wall of the sleeve 1 at one end away from the connector 22, so that the temperature element can be checked. In addition, the sleeve 2 is in the same direction as the heat flow, so the temperature can be increased quickly, and the measurement speed is improved.

[0048] It should be emphasized that the embodiments of the present invention are illustrative rather than restrictive. Therefore, the present invention includes but is not limited to the embodiments described in the specific implementation modes. Any other implementation modes derived by those skilled in the art based on the technical solutions of the present invention also fall within the scope of protection of the present invention.

Claims

1. An exhaust gas temperature probe for a heavy-duty gas turbine, characterized in that: include A sleeve (1) is installed at the exhaust end of the gas turbine; The exhaust temperature element (2) comprises a probe line (21), a connecting piece (22), and a shockproof module. One end of the probe line (21) is arranged in a sleeve (1), and the other end of the probe line (21) is connected to the connecting piece (22). The connecting piece (22) and the sleeve (1) are detachably connected. The shockproof module is installed on the probe line (21) and expands under high temperature to contact the inner wall of the sleeve (1).

2. The exhaust gas temperature probe for a heavy-duty gas turbine according to claim 1, characterized in that: The connecting piece (22) and the probe line (21) are integrally formed.

3. An exhaust gas temperature probe for a heavy-duty gas turbine according to claim 1 or 2, characterized in that: The end of the sleeve (1) close to the connecting piece (22) is a threaded structure, and the connecting piece (22) and the sleeve (1) are detachably connected via threads; the outer wall of the end of the connecting piece (22) away from the sleeve (1) is a hexagonal structure.

4. The exhaust gas temperature probe for a heavy-duty gas turbine according to claim 3, characterized in that: It also includes an explosion-proof plug, which includes a male head (23) and a female head (24). The probe line is arranged at an extension line at one end outside the sleeve and is connected to the male head (23). The male head (23) is provided with a plug (231), and the female head (24) is provided with a jack (241). The male head (23) and the female head (24) are connected via the plug (231) and the jack (241).

5. The exhaust gas temperature probe for a heavy-duty gas turbine according to claim 4, characterized in that: The explosion-proof plug further comprises a threaded sleeve (25), which is rotatably sleeved on the male head (23). The outer wall of the female head (24) is provided with threads. After the male head (23) is inserted into the insertion hole of the female head (24) through the plug, the threaded sleeve (25) is rotated so that the threaded sleeve (25) is connected to the female head (24) through the threads.

6. The exhaust gas temperature probe for a heavy-duty gas turbine according to claim 3, characterized in that: The length of the sleeve (1) is 532 mm, and the diameter of the sleeve (1) part is 38 mm.

7. The exhaust gas temperature probe for a heavy-duty gas turbine according to claim 1, characterized in that: The shockproof module comprises a first module (26) and a second module (27), wherein the first module (26) is a cylindrical structure with a diameter of 38 mm and a height of 21 mm; the second module (27) is a truncated cone structure with a height of 21 mm, a diameter of 38 mm at one end and a diameter of 32-36 mm at the other end.

8. The exhaust gas temperature probe for a heavy-duty gas turbine according to claim 7, characterized in that: There are 1 to 3 first modules (26), and one end of the first module (26) close to the connecting piece (22) is installed on the probe line (21); there are 3 to 8 second modules (27), and one end of the second module (27) away from the connecting piece (22) is installed on the probe line (21).

9. The exhaust gas temperature probe for a heavy-duty gas turbine according to claim 8, characterized in that: The first module (26) and the second module (27) are installed on the probe line (21) at equal intervals; one first module (26) is provided, and five second modules (27) are provided.

10. The exhaust gas temperature probe for a heavy-duty gas turbine according to claim 1, characterized in that: An observation hole (11) is provided on the outer wall of the end of the sleeve (1) facing away from the connecting piece (22).

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