A cooling shield for a flame detector within a housing of a combustion engine

Abstract

The application discloses a cooling protection device suitable for a flame detector in an engine cover, relates to the technical field of flame detectors, and comprises a protective cover, which is fixed in the engine cover through a mounting support, and a flame detector is loaded in the protective cover, wherein the flame detector is connected to an engine fire alarm control terminal through a signal cable; and a cooling pipe, which is connected to the protective cover, is arranged with a solenoid valve, and the engine fire alarm control terminal is connected with the solenoid valve to control the solenoid valve to open and close the cooling pipe. The application solves the problem that the direct use of the flame detector cannot work in the J-shaped engine cover and has high popularization value.

Description

Technical Field

[0001] This application relates to the field of flame detector technology, and specifically to a cooling and protection device suitable for flame detectors inside gas turbine housings. Background Technology

[0002] Gas turbines have advantages such as high efficiency, high power, small size, low investment, low operating costs, and long service life, and are widely used in the power generation industry. To ensure the safe operation of gas turbines, a reliable fire alarm and fire suppression system within the turbine casing is crucial for their safe and stable operation.

[0003] The design temperature for the internal environment of the new J-type gas turbine casing is 90℃, and existing conventional explosion-proof flame detectors cannot be directly applied to the internal environment of the new J-type gas turbine casing. Summary of the Invention

[0004] The main purpose of this application is to provide a cooling and protection device for flame detectors inside the casing of a gas turbine, which aims to solve the problem that conventional explosion-proof flame detectors in the prior art cannot be directly applied to the casing of a new type J gas turbine with an ambient temperature of 90°C.

[0005] The technical solution adopted in this application is as follows:

[0006] A cooling and protection device for flame detectors inside a gas turbine casing, comprising:

[0007] A protective cover, fixed inside the gas turbine housing by a mounting bracket, contains a flame detector, which is connected to the gas turbine fire alarm control terminal via a signal cable; and...

[0008] A cooling pipe is connected to the protective cover. A solenoid valve is installed on the cooling pipe. The gas turbine fire alarm control terminal is connected to the solenoid valve to control the opening and closing of the cooling pipe.

[0009] Optionally, the cooling pipeline is also equipped with a pressure regulating valve and a pressure sensor, both of which are connected to the gas turbine fire alarm control terminal.

[0010] Optionally, the cooling pipe includes a DN15 stainless steel pipe located outside the gas turbine casing and a DN12 stainless steel flexible hose located inside the gas turbine casing.

[0011] Optionally, the signal cable located inside the gas turbine housing is encased in an explosion-proof conduit.

[0012] Optionally, the mounting bracket includes:

[0013] A fixing plate, the fixing plate being used to fix to the gas turbine casing; and,

[0014] Mounting plate, which is used to mount the protective cover, is mounted to the fixing plate by fasteners.

[0015] Optionally, the fixing plate includes a base plate and a U-shaped plate disposed on the base plate, the base plate and the U-shaped plate forming a mounting cavity, and the mounting plate being installed in the mounting cavity by fasteners.

[0016] Optionally, the fastener includes:

[0017] An active handle is rotatably mounted on the U-shaped plate, and an active gear is sleeved on the active handle;

[0018] A driven adjusting rod is located on both sides of the driving handle and rotatably mounted on the U-shaped plate. A driven gear is sleeved on the driven adjusting rod, and the driven gear meshes with the driving gear.

[0019] A plug rod is inserted into the driven adjusting rod, and a first spring is provided between the plug rod and the driven adjusting rod;

[0020] An L-shaped pressure plate is disposed at the end of the insertion rod away from the driven adjusting rod. The L-shaped pressure plate can press and release the mounting plate as the driven adjusting rod rotates.

[0021] Optionally, the mounting plate is provided with a wedge-shaped surface to guide the rotation of the L-shaped pressure plate.

[0022] Optionally, the mounting plate includes a first end plate, a second end plate, and a connecting end plate located between the first end plate and the second end plate. The first end plate, the second end plate, and the connecting end plate are integrally formed into a Z-shaped plate. The first end plate is fastened to the fixing plate, and a mounting clamp for mounting the protective cover is provided on one side of the second end plate.

[0023] Optionally, the protective cover is provided with a set of elastic clips for fixing the flame detector. The elastic clips include a stepped shaft fixed to the inner wall of the protective cover, a second spring is sleeved on the stepped shaft, and a clip body is fixed to the end of the second spring away from the stepped shaft.

[0024] Compared with the prior art, the beneficial effects of this application are:

[0025] This application proposes a cooling and protection device for flame detectors inside a gas turbine casing. The device utilizes a gas turbine fire alarm control terminal to open a solenoid valve, allowing cooling to flow through the cooling pipes and supplying cooling medium into the protective casing. This ensures the flame detector operates at normal temperature within the casing of the new J-type gas turbine. In the event of a fire, the gas turbine fire alarm control terminal closes the solenoid valve, sealing the cooling pipes and cutting off the continued flow of cooling medium into the gas turbine casing, preventing the fire from spreading and significantly improving safety. Attached Figure Description

[0026] Figure 1 A schematic diagram of the structure of a cooling and protection device for a flame detector inside a gas turbine casing, provided in an embodiment of this application;

[0027] Figure 2 Schematic diagram of the mounting bracket Figure 1 ;

[0028] Figure 3 Schematic diagram of the mounting bracket Figure 2 ;

[0029] Figure 4 Schematic diagram of the mounting bracket Figure 3 ;

[0030] Figure 5 This is a schematic diagram of the internal structure of the insertion rod and the driven adjusting rod.

[0031] Figure 6 for Figure 3 Enlarged view of point A in the middle.

[0032] Explanation of the labels in the attached drawings:

[0033] 1-Gas turbine casing, 2-Flame detector, 3-Protective cover, 301-Air inlet, 302-Air outlet, 303-Electrical wiring port, 4-Mounting bracket, 41-Fixing plate, 410-Base plate, 411-U-shaped plate, 42-Mounting plate, 420-First end plate, 421-Second end plate, 422-Connecting end plate, 43-Mounting clamp, 44-Fastener, 440-Driving lever, 441-Driven adjusting lever, 442-Driving gear, 443-Driven gear, 444-Plug, 445-First spring, 446-Ring stop 447-T-type head, 448-L-type pressure plate, 45-Wedge-shaped surface, 46-Blocking component, 460-Fixed baffle, 461-Modible baffle, 462-Allowing groove, 463-Adjusting bolt, 464-Conical head, 47-Elastic clamp, 471-Stepped shaft, 472-Second spring, 473-Clamp body, 5-Cooling pipe, 6-Solenoid valve, 7-Gas turbine fire alarm control terminal, 8-Pressure regulating valve, 9-Pressure sensor, 10-DN15 stainless steel pipe, 11-DN12 stainless steel flexible hose, 12-Explosion-proof conduit, 13-Signal cable. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0036] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0038] As is well known, gas turbines produce extremely hot gas during operation. Part of the heat from the turbine exhaust is recycled through a waste heat boiler, while some heat is dissipated through the gas turbine itself. A gas turbine enclosure serves as a necessary protective measure for functions such as heat insulation, sound insulation, lighting, and gas-based fire suppression, ensuring the safe operation of the gas turbine. A reliable fire alarm and fire suppression system within the enclosure is crucial for the safe and stable operation of the gas turbine. According to relevant design specifications, the gas turbine's fire alarm system typically employs three fire alarm detectors installed within the enclosure: two explosion-proof heat detectors and one explosion-proof flame detector. To prevent false alarms and avoid false alarms, the system uses one alarm circuit to trigger an alarm, while the other two circuits trigger a gas turbine shutdown and automatic release of carbon dioxide gas for fire suppression. Explosion-proof heat detectors and explosion-proof flame detectors are installed inside the gas turbine casing. Since the design temperature inside the casing of E-type and F-type gas turbines is 80℃, the maximum operating temperature of currently available explosion-proof flame detectors is no greater than 85℃, which barely meets the fire protection design requirements of the gas turbine itself. However, for the new J-type gas turbine, the design temperature inside the casing is 90℃, and existing conventional explosion-proof flame detectors cannot be directly applied to the fire protection design of this type of gas turbine. Therefore, this application provides a cooling and protection device suitable for flame detectors inside the gas turbine casing.

[0039] See attached document Figure 1 A cooling and protection device for a flame detector inside a gas turbine casing includes a protective cover 3 and a cooling pipe 5. The protective cover 3 houses a flame detector 2. A glass window is provided on one side of the protective cover 3, and the infrared lens of the flame detector 2 is aligned with the glass window. The glass window is made of optical glass material that can transmit infrared light with minimal wavelength loss and can withstand temperatures above 90°C. The protective cover 3 is fixed inside the gas turbine casing 1 by a mounting bracket 4. The protective cover 3 is provided with an air inlet 301, an air outlet 302, and an electrical connection port 303. The flame detector 2 is connected to the protective cover 3 via a signal cable 13 through the electrical connection port 303, and is connected from inside the gas turbine casing 1 to a gas turbine fire alarm control terminal 7 outside the gas turbine casing 1. The gas turbine fire alarm control terminal 7 is prior art and will not be described in detail.

[0040] In this embodiment, one end of the cooling pipe 5 is connected to the air inlet 301 of the protective cover 3, for introducing a cooling medium into the protective cover 3. It is understood that, considering the power plant itself has a stable supply of compressed air, this embodiment utilizes compressed air near the gas turbine casing as the cooling air source and compressed air as the cooling medium, which is introduced into the protective cover 3 through the cooling pipe 5 to physically cool the flame detector 2, maintaining the protective cover 3 at a temperature below 80°C, thereby ensuring the normal operation of the flame detector 2. Of course, the compressed air introduced into the protective cover 3 is discharged through the air outlet 302, thereby preventing overpressure inside the protective cover 3.

[0041] As described above, a solenoid valve 6 is installed on the cooling pipe 5 to control the opening and closing of the cooling pipe 5. The solenoid valve 6 is connected to the gas turbine fire alarm control terminal. Under normal working conditions, the solenoid valve 6 is in the normally open state, continuously supplying compressed air into the protective cover 3 to maintain the temperature inside the protective cover 3 below 80°C. When a fire occurs inside the gas turbine casing, the gas turbine fire alarm control terminal 7 alarms and cuts off the cooling pipe 5 of the solenoid valve 6, stopping the supply of cooling medium (compressed air) into the protective cover 3, thereby preventing the fire from spreading.

[0042] In one embodiment, see Figure 1 As shown, a pressure regulating valve 8 and a pressure sensor 9 are also installed on the cooling pipe 5. Both the pressure regulating valve 8 and the pressure sensor 9 are connected to the gas turbine fire alarm control terminal 7. It can be understood that the pressure regulating valve 8 and the pressure sensor 9 keep the compressed air entering the protective cover 3 stable, ensuring the stable operating temperature of the flame detector 2. The signal from the pressure sensor 9 is connected to the gas turbine fire alarm control terminal 7. When the pressure is low, an alarm is triggered and manual or automatic intervention is initiated to adjust the air intake channel of the pressure regulating valve 8 to increase the air flow, thereby maintaining the stability of the compressed air.

[0043] In the above, considering the different working environments of the cooling pipe 5 located inside and outside the protective cover 3, in this embodiment, see... Figure 1 As shown, the cooling pipe 5 includes a DN15 stainless steel pipe 10 located outside the gas turbine casing and a DN12 stainless steel flexible hose 11 located inside the gas turbine casing. The DN15 stainless steel pipe 10 is used to connect to the gas turbine casing. The ambient temperature of the compressed air at room temperature can maintain the internal temperature of the flame detector 2 within its operating temperature range, ensuring the normal operation of the flame detector 2. Considering connection reliability and ease of installation with the protective cover 3, the cooling pipe 5 located inside the gas turbine casing uses a stainless steel flexible hose connection. Furthermore, to protect the signal cable 13 connected to the flame detector 2, see [reference needed]. Figure 1 As shown, the signal cable 13 located inside the gas turbine casing is encased in the explosion-proof conduit 12.

[0044] As described above, the working principle of the cooling and protection device for flame detectors inside a gas turbine casing provided in this application embodiment is as follows: A solenoid valve 6 is installed on the cooling pipe 5 to control the opening and closing of the compressed air supply line. Normally, it is open, supplying compressed air into the protective casing 3 to maintain the flame detector 2 at a normal ambient temperature. In the event of a fire, the solenoid valve 6 is closed via the gas turbine fire alarm control terminal 7, cutting off the compressed air supply to stop the continued airflow into the casing and prevent the fire from spreading. Furthermore, a pressure regulating valve 8 and a pressure sensor 9 are also installed on the cooling pipe 5 to maintain a stable cooling airflow into the protective casing 3, ensuring a stable ambient operating temperature for the flame detector 2. The pressure sensor 9 signal is connected to the gas turbine fire alarm control terminal 7. When the pressure is low, an alarm is triggered, and manual or automatic intervention is initiated by the pressure regulating valve 8 to adjust the air intake and ensure a stable temperature inside the protective casing 3.

[0045] As can be seen, this cooling and protection device utilizes the power plant's own compressed air as a cooling air source to provide cooling air for flame detector 2, enabling flame detector 2 to operate normally in the high-temperature environment of the J-type gas turbine casing, thus improving the reliability of the gas turbine's fire alarm and fire-fighting linkage system. It solves the problem that flame detector 2 cannot operate directly inside the J-type gas turbine casing, and has high potential for widespread application.

[0046] In the above description, the protective cover 3 is fixed inside the gas turbine casing by the mounting bracket 4. For easy disassembly and assembly of the cooling device, please refer to [reference needed]. Figure 2 and Figure 3 As shown, the mounting bracket 4 includes a fixing plate 41 and a mounting plate 42. The fixing plate 41 is used to fix the gas turbine casing, and the mounting plate 42 is used to install the protective cover 3. The mounting plate 42 is installed on the fixing plate 41 by fasteners 44.

[0047] In this embodiment, the fixing plate 41 includes a base plate 410 and a U-shaped plate 411. The base plate 410 is a rectangular long plate with threaded holes through both sides. Bolts are installed in the threaded holes, and the base plate 410 is installed on the inner wall of the gas turbine casing by bolts. The U-shaped plate 411 is integrally formed on the surface of the base plate 410, and the U-shaped plate 411 and the base plate 410 form a square mounting cavity. The mounting plate 42 is inserted into the mounting cavity and fixed by fasteners 44.

[0048] As described above, the mounting plate 42 includes a first end plate 420, a second end plate 421, and a connecting end plate 422. The connecting end plate 422 is integrally formed between the first end plate 420 and the second end plate 421. The first end plate 420, the second end plate 421, and the connecting end plate 422 are integrally formed into a Z-shaped plate. The first end plate 420 is fastened to a mounting cavity on one side of the fixing plate 41. A mounting clamp 43 is provided on one side of the second end plate 421. The mounting clamp 43 is used to clamp the protective cover 3. The Z-shaped mounting plate 42 can support the protective cover 3, making it easy to put the protective cover 3 away.

[0049] In this embodiment, in order to secure the mounting plate 42 within the mounting cavity of the fixing plate 41, see [reference needed]. Figures 2 to 4 As shown, the fastener 44 includes a drive handle 440, a driven adjusting rod 441, an insert rod 444, and an L-shaped pressure plate 448. The U-shaped plate 411 has three through holes arranged side by side, and a rotating bearing is embedded in each through hole. The drive handle 440 and the driven adjusting rod 441 are respectively inserted into the rotating bearings, with the drive handle 440 positioned in the center and a pair of driven adjusting rods 441 on both sides. A drive gear 442 is fixedly mounted on the drive handle 440 by a key connection. Correspondingly, a driven gear 443 is also fixedly mounted on the driven adjusting rod 441 by a key connection. The drive gear 442 and the driven gear 443 mesh with each other. Thus, it can be imagined that by rotating the drive handle, the driven adjusting rods 441 on both sides can be driven to rotate synchronously by the meshing of the drive gear 442 and the driven gear 443.

[0050] See above. Figures 2 to 4 As shown, the driven adjusting rods 441 on both sides extend to one end of the mounting cavity and have insertion holes along the axial direction. The insertion rod 444 is a stepped shaft 471 rod. The smaller diameter shaft end of the insertion rod 444 is inserted into the insertion hole, and the larger diameter shaft end is located outside the insertion hole. Thus, the insertion rod 444 can reciprocate along the axial direction of the driven adjusting rod 441. To prevent the insertion rod 444 from slipping out of the driven adjusting rod 441, see [reference needed]. Figure 5 As shown, the opening of the insertion hole is integrally formed with a ring stop 446, and the small-diameter shaft end of the driven adjusting rod 441 is integrally formed with a T-shaped head 447. The ring stop 446 blocks the T-shaped head 447, thereby restricting the insertion rod 444 from sliding out of the driven adjusting rod 441. At the same time, in order to enable the insertion rod 444 to rotate synchronously with the driven adjusting rod 441, the inner wall of the driven adjusting rod 441 is provided with a limiting groove along the axial direction. The T-shaped head 447 is integrally formed with a slider, which is embedded in the limiting groove. Thus, by utilizing the cooperation between the slider and the limiting groove, the insertion rod 444 can both slide along the axis of the driven adjusting rod 441 and rotate with the driven adjusting rod 441. Meanwhile, a first spring 445 is sleeved between the insertion rod 444 and the driven adjusting rod 441. When the first spring 445 is in its natural state, its two ends abut against the insertion rod 444 and the driven adjusting rod 441 respectively. When the insertion rod 444 moves into the driven adjusting rod 441, the first spring 445 is compressed.

[0051] In another example, the end of the insert rod 444 away from the driven adjusting rod 441 is integrally formed with an L-shaped pressure plate 448. The horizontal section of the L-shaped pressure plate 448 is integrally formed with the insert rod 444, and the vertical section of the L-shaped pressure plate 448 extends vertically downward. The surface of the first end plate 420 of the mounting plate 42 is provided with a wedge-shaped surface 45 with gradually increasing thickness from the outside to the side of the connecting end plate 422. During the rotation of the L-shaped pressure plate 448 with the driven adjusting rod 441, the L-shaped pressure plate 448 can press and release the mounting plate 42.

[0052] Based on the above, it can be imagined that when it is necessary to fix the mounting bracket 4 to the inner wall of the gas turbine casing, the first end plate 420 of the mounting plate 42 is inserted into the mounting cavity. Then, the driving handle 440 is turned by hand. The meshing of the driving gear 442 and the driven gear 443 drives the driven adjusting rods 441 on both sides to rotate. After the driven adjusting rods 441 rotate, they drive the corresponding insert rods 444 to rotate synchronously. As a result, the L-shaped pressure plate 448 rotates with the insert rods 444. The vertical section of the L-shaped pressure plate 448 gradually rotates from the outside of the mounting plate 42 along the wedge surface 45 to the surface of the first end plate 420 of the mounting plate 42. As the L-shaped pressure plate 448 rotates from the outside along the wedge surface 45 inward, the insert rods 444 are gradually squeezed into the inside of the insert rods 444, thus the spring is compressed. Therefore, the first spring 445 will react on the mounting plate 42, applying pressure to the mounting plate 42, thereby squeezing and fixing the mounting plate 42 in the mounting cavity. Conversely, when it is necessary to remove the mounting bracket 4 from the gas turbine casing, the drive lever 440 is rotated in the opposite direction. The meshing of the drive gear 442 and the driven gear 443 drives the driven adjusting rods 441 on both sides to rotate. After the driven adjusting rods 441 rotate, they drive the insert rods 444 that cooperate with them to rotate synchronously. As a result, the L-shaped pressure plate 448 rotates with the insert rods 444. The vertical section of the L-shaped pressure plate 448 rotates from the surface of the mounting plate 42 toward the outside of the mounting plate 42. Thus, the L-shaped pressure plate 448 disengages from the mounting plate 42, the first spring 445 returns to its original length, and the mounting plate 42 can be removed from the mounting cavity.

[0053] For easier fixing of the protective cover 3 to the mounting bracket 4, see [reference needed]. Figures 2 to 4 As shown, a mounting clamp 43 is provided on one side of the second end plate 421 of the mounting plate 42. The mounting clamp 43 and the mounting plate 42 form a U-shaped frame. The mounting clamp 43 has a slot along its length. The outer wall of the protective cover 3 is provided with a strip that matches the slot. The protective cover 3 is inserted into the slot through the strip to form a sliding connection with the mounting clamp 43, so as to facilitate the removal of the protective cover 3 from the mounting bracket 4. One end of the slot does not penetrate through, while the other end penetrates through and a blocking member 46 is provided at the opening to lock the protective cover 3 on the mounting bracket 4.

[0054] See above. Figure 6As shown, the blocking member 46 includes a fixed baffle 460, a movable baffle 461, and an adjusting bolt 463. The fixed baffle 460 is integrally formed into the slot opening of the mounting plate 43. The movable baffle 461 is rotatably connected to the fixed baffle near the slot by a hinge. The movable baffle 461 has a clearance groove 462 along its central axis. The fixed baffle 460 has a threaded hole at an angle. The adjusting bolt 463 is disposed in the threaded hole, and the screw section of the adjusting bolt 463 is inserted into the clearance groove 462 of the movable baffle 461. The diameter of the screw section of the adjusting bolt 463 is smaller than that of the clearance groove 462. The groove diameter of slot 462 is adjusted, and two conical heads 464 are provided at the screw end of adjusting bolt 463 to restrict the two sides of movable baffle 461. It can be imagined that when the protective cover 3 is installed in the mounting clamp 43 and needs to be locked, by rotating adjusting bolt 463, one end of the conical head 464 of adjusting bolt 463 is gradually moved away from fixed baffle 460, thereby driving movable baffle 461 to gradually rotate until it is perpendicular to fixed baffle 460. Thus, movable baffle 461 blocks the slot opening, preventing the protective cover 3 from sliding out, thereby fixing the protective cover 3 to mounting clamp 43. Conversely, when it is necessary to remove the protective cover 3 from the mounting plate 43, simply rotate the adjusting bolt 463 in the opposite direction so that one end of the conical head 464 of the adjusting bolt 463 gradually approaches the fixed baffle 460, thereby driving the movable baffle 461 to gradually rotate towards the fixed baffle 460 and open the slot opening, so that the protective cover 3 can be slid out of the mounting plate 43. The disassembly and assembly of the protective cover 3 is very convenient.

[0055] Finally, the protective cover 3 includes a cover body and a cover cap, the cover cap of which can be removed from the cover body to open the cover body. Inside the cover body is a set of elastic clips 47 for fixing the flame detector 2. The elastic clips 47 include a stepped shaft 471, a second spring 472, and a clip body 473. The stepped shaft 471 is integrally formed inside the protective cover 3 and fixed. The second spring 472 is sleeved on the stepped shaft 471. One end of the second spring 472 is fused to the stepped shaft 471, and the other end of the second spring 472 is fused to the clip body 473. The clip body 473 is used to hold the flame detector 2. It can be imagined that during use, the flame detector 2 is placed between the clip bodies 473 on both sides, and the second spring 472 is used to bring the clip bodies 473 together in the middle, thereby clamping the flame detector 2 and fixing it. Pulling the clip bodies 473 to both sides will release the flame detector 2, and the flame detector 2 can be taken out, making the replacement of the flame detector 2 very convenient.

[0056] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cooling and protection device for flame detectors inside a gas turbine casing, characterized in that, include: A protective cover (3) is fixed inside the gas turbine casing (1) by a mounting bracket (4). A flame detector (2) is installed inside the protective cover (3). The flame detector (2) is connected to the gas turbine fire alarm control terminal (7) via a signal cable (13). Cooling pipe (5), the cooling pipe (5) is connected to the protective cover (3), the cooling pipe (5) is equipped with a solenoid valve (6), the gas turbine fire alarm control terminal (7) is connected to the solenoid valve (6) to control the solenoid valve (6) to open and close the cooling pipe (5); The mounting bracket (4) includes: A fixing plate (41) for fixing to the gas turbine casing; and, Mounting plate (42), the mounting plate (42) is used to mount the protective cover (3), the mounting plate (42) is mounted to the fixing plate (41) by fasteners (44); The fixing plate (41) includes a base plate (410) and a U-shaped plate (411) disposed on the base plate (410). The base plate (410) and the U-shaped plate (411) form an installation cavity. The mounting plate (42) is installed in the installation cavity by fasteners (44). The fastener (44) includes: An active handle (440) is rotatably mounted on the U-shaped plate (411), and an active gear (442) is sleeved on the active handle (440). A driven adjusting rod (441) is located on both sides of the driving handle (440) and rotatably mounted on the U-shaped plate (411). A driven gear (443) is sleeved on the driven adjusting rod (441) and meshes with the driving gear (442). A plug rod (444) is inserted into the driven adjusting rod (441), and a first spring (445) is provided between the plug rod (444) and the driven adjusting rod (441); and, L-shaped pressure plate (448) is disposed at the end of the insertion rod (444) away from the driven adjusting rod (441). The L-shaped pressure plate (448) can press and release the mounting plate (42) as the driven adjusting rod (441) rotates.

2. The cooling and protection device for flame detectors inside a gas turbine casing according to claim 1, characterized in that, The cooling pipe (5) is also equipped with a pressure regulating valve (8) and a pressure sensor (9), both of which are connected to the gas turbine fire alarm control terminal (7).

3. The cooling and protection device for flame detectors inside a gas turbine casing according to claim 1, characterized in that, The cooling pipe (5) includes a DN15 stainless steel pipe (10) located outside the gas turbine casing and a DN12 stainless steel flexible hose (11) located inside the gas turbine casing.

4. The cooling and protection device for flame detectors inside a gas turbine casing according to claim 1, characterized in that, The signal cable (13) located inside the gas turbine housing is encased in an explosion-proof conduit (12).

5. The cooling and protection device for flame detectors inside a gas turbine casing according to claim 1, characterized in that, The mounting plate (42) is provided with a wedge-shaped surface (45) that guides the L-shaped pressure plate (448) to rotate.

6. The cooling and protection device for flame detectors inside a gas turbine casing according to claim 1, characterized in that, The mounting plate (42) includes a first end plate (420), a second end plate (421), and a connecting end plate (422) located between the first end plate (420) and the second end plate (421). The first end plate (420), the second end plate (421), and the connecting end plate (422) are integrally formed into a Z-shaped plate. The first end plate (420) is fastened to the fixing plate (41). A mounting clamp (43) for mounting the protective cover (3) is provided on one side of the second end plate (421).

7. The cooling and protection device for flame detectors inside a gas turbine casing according to claim 1, characterized in that, The protective cover (3) is provided with a set of elastic clips (47) for fixing the flame detector (2). The elastic clips (47) include a stepped shaft (471) fixed to the inner wall of the protective cover (3). A second spring (472) is sleeved on the stepped shaft (471). A clamping body (473) is fixed to one end of the second spring (472) away from the stepped shaft (471).

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