CN217384575U - A on-line monitoring device for gas turbine power plant combustible gas leaks - Google Patents

Abstract

The utility model provides an on-line monitoring device for gas turbine power plant combustible gas leaks, including high temperature probe, secondary instrument, rack and combustion engine control system, high temperature probe has a plurality of, the secondary instrument sets up with the high temperature probe one-to-one, the secondary instrument sets up in the position that is close to high temperature probe be provided with the lead wire on the high temperature probe, the lead wire is connected with rack and secondary instrument electricity respectively, the secondary instrument with combustion engine control system electricity is connected. The utility model discloses a set up secondary instrument near high temperature probe to with high temperature probe's lead wire lug connection, only need alone can accomplish high temperature probe's demarcation work, reduced the release amount of calibration gas, improved security and economic nature when high temperature probe marks, high temperature probe's lead wire is direct to be connected with secondary instrument, has eliminated the measuring error that the middle wiring is bad to lead to, has improved accuracy, the ageing of on-the-spot combustible gas concentration data control.

Description

A on-line monitoring device for gas turbine power plant combustible gas leaks

Technical Field

The utility model relates to a gas power generation technical field particularly, relates to an on-line monitoring device for gas turbine power plant combustible gas leaks.

Background

In the power industry, along with the deep humanity of the energy-saving and environment-friendly concept, the high-efficiency and low-emission gas turbine generator set gradually becomes a main option in the power industry of various countries. The gas turbine usually uses natural gas as fuel, the natural gas has high heat value and little environmental pollution after combustion, the emission of carbon dioxide with single heat value in all fuels is the lowest, and NO is _x The emission rate of the coal is low, and the coal can meet the exhaust emission standard of a power plant, so that the coal becomes a main energy source after coal and petroleum.

Because the adopted fuel is usually natural gas, the main component of the natural gas is methane, and other alkanes such as a small amount of non-hydrocarbons such as ethane, propane and the like exist, the methane belongs to flammable and explosive gas and is easily mixed with air to form explosive mixed gas, if the methane leaks in a closed space, the ignition concentration limit is easily reached, and other toxic gases are inevitably existed in the production process, in order to prevent accidents, a complete dangerous gas detection system is required, the leakage condition of the flammable gas or the toxic gas in the environment can be monitored, and an alarm can be timely sent out to ensure the production and personal safety.

In the prior art, in order to ensure the safety of equipment and personnel, a gas turbine power plant is provided with a hazardous gas detection probe in the closed space of a gas turbine and a generator thereof, so that the concentration of the hazardous gas can be mastered at any time, and once the concentration exceeds the limit, a gas turbine control system can cause corresponding actions to ensure the safety of a unit.

The existing detection equipment generally adopts a catalytic combustion type sensor, a measuring probe is positioned at each site, a voltage signal is output to a secondary instrument during the working period of the measuring probe, the secondary instrument analyzes the voltage and outputs a current signal to a combustion engine control system, and the current signal finally participates in the control and display of the combustion engine. The measuring probe can take place the circumstances that the precision reduces in the use, especially in toxic gas environment, and measuring probe precision requires more, needs often to mark, and prior art's secondary instrument sets up usually in the gas turbine electron room, and probe mark time needs at least two people respectively in the scene with the gas turbine electron between the collaborative operation can accomplish, once mark the success rate low.

SUMMERY OF THE UTILITY MODEL

The utility model provides an among the prior art, need two at least people respectively can accomplish in coordination between scene and gas turbine electron during probe calibration, once mark the success rate low.

In order to solve the problem, the utility model discloses an on-line monitoring device for gas turbine power plant combustible gas leaks, including high temperature probe, secondary instrument, rack and gas turbine control system, high temperature probe has a plurality of, secondary instrument and high temperature probe one-to-one set up, the secondary instrument sets up in the position that is close to high temperature probe be provided with the lead wire on the high temperature probe, the lead wire is connected with rack and secondary instrument electricity respectively, the secondary instrument with the gas turbine control system electricity is connected.

The secondary instrument is arranged at a position close to the high-temperature probe, and the lead of the high-temperature probe is directly connected with the secondary instrument, so that the high-temperature probe has the following advantages: firstly, operators on site can directly observe the matching operation of the secondary instrument during calibration, only one operator is needed to calibrate, a communication link during the cooperative operation is omitted, and human resources are saved under the condition that the calibration efficiency and the success rate of primary calibration are improved; secondly, an operator observes the secondary instrument to calibrate the high-temperature probe, and can accurately control the release amount of the calibration gas, thereby effectively avoiding excessive release of the calibration gas and improving the safety during calibration; and thirdly, the lead of the high-temperature probe is directly connected with the secondary instrument, so that the connecting links of intermediate wiring and probe clamping pieces are saved, the influence factors during signal transmission are effectively reduced, and the accuracy of gas leakage monitoring is improved.

Further, high temperature probe includes combustion engine housing probe, gas booth probe, excitation housing probe and generator knapsack probe, combustion engine housing probe sets up in the combustion engine housing wind channel of power plant, gas booth probe sets up in the gas booth wind channel of power plant, excitation housing probe sets up in the generator excitation housing of power plant, generator knapsack probe sets up in the generator knapsack of power plant.

The positions are places where combustible gas leakage easily occurs in a production field, and the high-temperature probe is arranged at the places, so that the easy-leakage points in the field can be effectively monitored, the actual situation of the field can be better mastered, and the combustible gas leakage treatment method can be used for treating the combustible gas leakage in the first time when leakage danger occurs.

Further, the secondary instrument includes gas turbine housing instrument, gas booth instrument and generator instrument, the gas turbine housing instrument with gas turbine housing probe electricity is connected, the gas booth instrument with gas booth connects the electricity, the generator instrument with excitation housing probe and generator knapsack probe electricity are connected.

The secondary instruments corresponding to the excitation housing probes and the secondary instruments corresponding to the generator backpack probes are marked as generator instruments in a unified mode, and are arranged close to the generator in a centralized mode, so that management of the secondary instruments is facilitated.

Furthermore, the online monitoring device also comprises an instrument support, the instrument support is used for mounting a secondary instrument, the instrument support comprises a first support, a second support and a third support, and the first support is arranged on the gas turbine housing and used for mounting a gas turbine housing instrument; the second support is arranged on the top cover of the gas booth and used for mounting a gas booth instrument; the third support is arranged on the ground close to the generator and used for installing a generator instrument.

The setting of instrument support can provide the mounting base of secondary instrument to make secondary instrument keeps certain height, make things convenient for operating personnel observes during the high temperature probe calibration.

Furthermore, each instrument support is provided with 1-4 secondary instruments, and adjacent secondary instruments are installed on the same instrument support in a staggered mode.

The dislocation installation of adjacent secondary instrument indicates, the display surface of two adjacent secondary instruments is towards different directions, this is because, secondary instrument among the prior art is usually in the open-ended line of walking of below, if two adjacent secondary instruments adopt same direction installation need pull open considerable distance so that walk the line to lead to the high height of instrument support, and adopt the dislocation installation can need not consider the problem of cable layout space, can reduce the height of instrument support effectively, save the space and occupy.

Further, the instrument support is of a cylindrical structure, and the secondary instrument is clamped on the surface of the cylinder through a U-shaped buckle and then fixedly connected through a screw.

The secondary instrument can be preliminarily fixed by the U-shaped buckle, the secondary instrument can be quickly installed, and the secondary instrument is firmly installed by the aid of the connection of the screws.

Furthermore, the number of the combustion engine housing probes and the number of the combustion engine housing instruments are 8, 8 the combustion engine housing instruments are arranged on the two first supports, and the adjacent combustion engine housing instruments on the same first support are installed in a staggered mode.

Further, gas booth probe and gas booth instrument all have 3, 3 gas booth instrument sets up on a second support, and adjacent gas booth instrument dislocation is installed.

Furthermore, excitation housing probe and generator knapsack probe count totally 5, and there are 5, 5 with its generator instrument that corresponds the generator instrument sets up respectively on two third supports, adjacent generator instrument dislocation installation on same third support.

Furthermore, a lead of the high-temperature probe is electrically connected with a power module in the cabinet, and a safety device is arranged between the lead and the power module.

The power module comprises a first power module and a second power module, the lead is connected with the first power module or the second power module through the second fast switching device, the safety device can effectively guarantee the power supply safety of the high-temperature probe, and danger caused by power supply faults is avoided.

Compared with the prior art, an on-line monitoring device for gas turbine power plant combustible gas leaks have following advantage:

the utility model discloses a set up the secondary instrument near high temperature probe, and with high temperature probe's lead wire lug connection, only need alone can accomplish high temperature probe's demarcation work, calibration gas's release amount has also been reduced, safety and economic nature when high temperature probe calibration have been improved, and simultaneously, high temperature probe's lead wire is direct to be connected with the secondary instrument, original intermediate junction and connection fastener have been cancelled, the measuring error that the intermediate junction harmfully leads to has been eliminated, the accuracy of combustible gas concentration data monitoring in the on-the-spot production facility space has been improved, timeliness, safety, furthermore, the instrument support be provided with the concentrated installation management that helps the secondary instrument, the dislocation installation of secondary instrument is favorable to the cable to be arranged, the space occupation has been reduced simultaneously. The utility model discloses simple structure, it is convenient to install, has improved security and economic nature when high temperature probe calibration.

Drawings

Fig. 1 is a schematic connection diagram of a high-temperature probe, a cabinet, and a gas turbine control system according to an embodiment of the present invention;

FIG. 2 is a wiring diagram of a high temperature probe, a secondary instrument, and a gas turbine control system according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the connection of power supply inside the cabinet in the prior art;

fig. 4 is a schematic connection diagram of the power supply inside the cabinet according to the embodiment of the present invention;

FIG. 5 is a schematic diagram of the wiring of the field signal and power lines in the prior art;

fig. 6 is a schematic wiring diagram of the field signal and the power line according to the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a secondary instrument arranged on a gas turbine housing according to an embodiment of the present invention;

fig. 8 is a schematic structural view of the gas booth top cover provided with the secondary instrument according to the embodiment of the present invention;

fig. 9 is a schematic structural diagram of a secondary instrument disposed near a generator according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of the arrangement positions of a high-temperature probe, a clamping member, a secondary instrument and a gas turbine control system in the prior art;

fig. 11 is a schematic diagram of the arrangement positions of the high-temperature probe, the secondary instrument and the gas turbine control system according to the embodiment of the present invention;

fig. 12 is a schematic view of a connection structure between a secondary instrument and an instrument holder according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of the secondary instrument installed on the instrument holder in a staggered manner according to the embodiment of the present invention.

Description of reference numerals:

1. a high temperature probe; 11. a gas turbine housing probe; 12. a gas booth probe; 13. exciting the probe of the housing; 14. a generator backpack probe; 2. a secondary instrument; 21. a gas turbine shroud instrument; 22. a gas booth instrument; 23. a generator meter; 3. a cabinet; 31. a first card power module; 32. a first power supply module; 33. a second card power module; 34. a second power supply module; 35. a first fast cutting device; 36. a second fast cutting device; 37. a clip assembly; 371. a clamping piece blind plate; 372. a probe fastener; 38. a terminal block; 39. a safety device; 4. a combustion engine control system; 5. a combustion engine housing; 51. an air duct of a gas turbine housing; 6. a gas booth top cover; 61. a gas booth air duct; 7. a generator; 71. an excitation housing; 8. an instrument holder; 81. a first bracket; 82. a second bracket; 83. and a third bracket.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting of the invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

An online monitoring device for combustible gas leakage of a gas turbine power plant according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings.

Example 1

This embodiment provides an on-line monitoring device for gas turbine power plant combustible gas leaks, as shown in fig. 1, fig. 2, fig. 4, fig. 6, fig. 11, including high temperature probe 1, secondary instrument 2, rack 3 and combustion engine control system 4, high temperature probe 1 has a plurality of, secondary instrument 2 sets up with 1 one-to-one of high temperature probe, secondary instrument 2 sets up in the position that is close to high temperature probe 1 be provided with the lead wire on the high temperature probe 1, the lead wire is connected with rack 3 and secondary instrument 2 electricity respectively, secondary instrument 2 with 4 electricity of combustion engine control system are connected. The industrial detection of natural gas generally adopts a catalytic sensor, the core of which is a Wheatstone bridge, a measuring element is in contact with combustible gas, the sensor burns on the bridge with a catalyst without flame, the resistance value of a bridge arm is increased due to the increase of temperature, so that the bridge loses balance, voltage or current signals are output, and the signals are used for monitoring the gas leakage condition of a working site of a combustion engine. As shown in fig. 10, in the prior art, the secondary instrument 2 is generally arranged in an electronic room of a combustion engine, and it is found that, in the working process, the secondary instrument 2 is prone to inaccurate measurement, and the calibration efficiency and the primary calibration success rate of the high-temperature probe 1 are not high, and through careful research, the influence factors are as follows: firstly, at least two persons are required to be respectively in the field and the gas turbine electronic room for cooperative operation, so that the calibration efficiency is influenced; secondly, the discharge amount of the calibration gas cannot be accurately controlled, so that the discharge amount of the calibration gas is too much, the calibration gas is usually hydrogen or methane, and the safety of the site is seriously influenced due to too much discharge; thirdly, communication is needed when the two places are cooperatively operated, communication signals on the working site of the gas turbine are easily affected, so that calibration is difficult, and the success rate of primary calibration is low; fourthly, high temperature probe 1's lead wire length is limited, and need set up intermediate junction line between the secondary instrument 2, and the connected mode is connected or articulated for the terminal block usually, needs probe fastener 372 to carry out the conversion of signal under the partial condition even, has increased the unstable factor, leads to the signal instability that secondary instrument 2 received, influences gas leakage's accurate control. In this embodiment, the secondary instrument 2 is disposed at a position close to the high temperature probe 1, and the lead of the high temperature probe 1 is directly connected to the secondary instrument 2, which has the following advantages: firstly, operators on site can directly observe the matching operation of the secondary instrument 2 during calibration, only one operator is needed to perform calibration, a communication link during cooperative operation is omitted, and human resources are saved under the condition that the calibration efficiency and the primary calibration success rate are improved; secondly, an operator observes the secondary instrument 2 to calibrate the high-temperature probe 1, and can accurately control the release amount of the calibration gas, thereby effectively avoiding excessive release of the calibration gas and improving the safety during calibration; thirdly, the lead of the high-temperature probe 1 is directly connected with the secondary instrument 2, so that the connecting links of intermediate wiring and the probe clamping piece 372 are saved, the influence factors during signal transmission are effectively reduced, and the accuracy of gas leakage monitoring is improved. It should be noted that, prior art generally adopts formula of cuting straightly or extraction formula measuring method, because of environmental factor influences, formula of cuting straightly has higher requirement to measuring probe self material, high temperature resistant, explosion-proof, acid and alkali gas fog corrosion prevention etc. high temperature factor can be solved to the extraction formula and influence is brought, nevertheless need to increase relevant consumer such as aspiration pump, increase fault probability, and in case the air pump trouble stops transporting, can't in time accurately learn trouble emergence time, need add equipment and patrol and examine some supervisory control, consequently, the utility model discloses a formula of cuting straightly high temperature probe 1 monitors, can ensure monitoring effect.

Fig. 2 shows the wiring manner of the high-temperature probe 1, the secondary instrument 2 and the combustion engine control system 4 after being configured according to the present embodiment, the wiring terminal layout of the terminal box on the secondary instrument 2 is shown in a circular dotted line, the wiring layout of the combustion engine control system 4 is shown in a square dotted line, and the high-temperature probe 1 is connected to the left side of the circular dotted line. This setting has saved middle wiring and the probe fastener 372 between high temperature probe 1 and the secondary instrument 2, has eliminated the measuring error of secondary instrument 2, has promoted the monitoring accuracy.

Fig. 3 shows a power supply wiring layout inside a cabinet 3 in the prior art, two mutually standby power supplies, a 1#220V power supply and a 2#220V power supply, and a card assembly 37 and a plurality of terminal strip 38 are further provided in the cabinet 3, the 1#220V power supply is connected with a first card power module 31 and a first power module 32, the first card power module 31 converts the 220V power supply into 24V and supplies power to the card assembly 37, the first power module 32 is used for supplying power to the terminal strip 38, the terminal strip 38 is used for connecting a high-temperature probe 1 or a combustion engine control system 4, the 2#220V power supply is connected with a second card power module 33 and a second power module 34, the second card power module 33 converts the 220V power supply into 24V and supplies power to the terminal assembly 37, the second card power module 34 is used for supplying power to the terminal strip 38, a first fast-cutting device 35 is disposed between the first card power module 31 and the second card power module 33, the first fast-cutting device 35 is used to switch the power supply module of the card assembly 37, so that the power supply module is switched between the first card power module 31 and the second card power module 33, the second fast-cutting device 36 is used to switch the power supply module of the terminal block 38, so that the power supply module is switched between the first power module 32 and the second power module 34, the card assembly 37 may include multiple specifications and models of cards for processing signals or data of different detection devices in an electric field, and includes a part of probe cards 372, as shown in fig. 5, in the prior art, the probe cards 372 are respectively connected with the high-temperature probe 1 and the combustion engine control system 4 for processing voltage signals detected by the high-temperature probe 1, in this embodiment, as shown in fig. 4 and fig. 6, the high-temperature probe 1 is connected to the first power module 32 or the second power module 34 in the cabinet 3, and the card fastener blind plate 371 is arranged at the position of the probe card fastener 372, which is equivalent to the embodiment that the probe card fastener 372 is omitted, so that the hardware cost is reduced. In addition, in order to protect the power supply safety of the high-temperature probe 1, a safety device 39 is arranged between the high-temperature probe 1 and the power supply of the cabinet 3, so that the power supply safety of the high-temperature probe 1 can be effectively ensured, and the danger caused by power supply faults can be avoided.

As an embodiment of the utility model, high temperature probe 1 includes combustion engine housing probe 11, gas booth probe 12, excitation housing probe 13 and generator knapsack probe 14, combustion engine housing probe 11 sets up in the combustion engine housing wind channel 51 of power plant, gas booth probe 12 sets up in the gas booth wind channel 61 of power plant, excitation housing probe 13 sets up in the generator excitation housing 71 of power plant, generator knapsack probe 14 sets up in the generator knapsack (not shown in the figure) of power plant. The positions are places where combustible gas leakage easily occurs in a production field, and the high-temperature probe 1 is arranged to effectively monitor points which are easy to leak on the site, so that the actual situation of the site can be better mastered, and the combustible gas leakage risk can be treated in the first time when leakage occurs. It should be noted that the positions of the gas turbine housing air duct 51 corresponding to the position of the gas turbine housing probe 11, the position of the gas small air duct 61 corresponding to the position of the gas small probe 12, the position of the excitation housing 71 corresponding to the excitation housing probe 13, and the position of the generator backpack corresponding to the generator backpack probe 14 are all provided with detachable metal walls, and the detachable metal walls are used for calibration, replacement or maintenance of the high-temperature probe 1.

In some optional embodiments, as shown in fig. 7, 8 and 9, the secondary meter 2 includes a combustion engine housing meter 21, a gas room meter 22 and a generator meter 23, the combustion engine housing meter 21 is electrically connected to the combustion engine housing probe 11, the gas room meter 22 is electrically connected to the gas room probe 12, and the generator meter 23 is electrically connected to the excitation housing probe 13 and the generator backpack probe 14. Specifically, since the field housing 71 and the generator backpack are both disposed around the generator 7, the secondary meters 2 corresponding to the field housing probe 13 and the secondary meters 2 corresponding to the generator backpack probe 14 are collectively denoted as generator meters 23, and are collectively disposed at a position close to the generator 7, which facilitates management of the secondary meters 2.

As a preferred embodiment, the online monitoring device further comprises a meter bracket 8, the meter bracket 8 is used for mounting the secondary meter 2, the meter bracket 8 comprises a first bracket 81, a second bracket 82 and a third bracket 83, the first bracket 81 is arranged on the engine casing 5 and is used for mounting the engine casing meter 21; the second bracket 82 is arranged on the gas booth top cover 6 and used for mounting the gas booth instrument 22; the third bracket 83 is disposed on the ground near the generator 7 for mounting the generator meter 23. The setting of instrument support 8 can provide the mounting base of secondary instrument 2 to make secondary instrument 2 keeps certain height, makes things convenient for operating personnel observes during high temperature probe 1 calibration. Preferably, the instrument support 8 is welded and fixed with the combustion engine housing 5 and the gas small-room top cover 6, so that the stability of the instrument support 8 can be ensured, and the safe operation of the secondary instrument 2 is ensured.

In some optional embodiments, 1-4 secondary meters 2 are arranged on each meter bracket 8. It should be understood that the arrangement of the meter support 8 and the secondary meters 2 should be based on the layout of the operation without affecting the field and the observation of the operator, and four installation positions of the secondary meters 2 are arranged on each meter support 8, which is beneficial to the centralized arrangement of the secondary meters 2 and the maintenance and management thereof.

In a preferred embodiment, adjacent secondary meters 2 are mounted on the same meter support 8 in a staggered manner. Adjacent secondary instrument 2 dislocation installation is, as shown in fig. 13, the display surface of two adjacent secondary instruments 2 is towards different directions, this is because, secondary instrument 2 among the prior art is usually wired at the lower side opening, if two adjacent secondary instruments 2 adopt same direction installation need pull open considerable distance so that walk the line, thereby lead to the high height of instrument support 8, and adopt the dislocation installation can need not consider the problem of cable layout space, can reduce instrument support 8's height effectively, save space occupation. Preferably, the display surfaces of the secondary meters 2 on the meter support 8 face different directions, for example, when four secondary meters 2 are provided, the directions are front, left, right and back, the lower side of each secondary meter 2 thus provided is in a vacant state, and the layout of cables is not affected at all, so that the arrangement of the secondary meters 2 is more compact.

Specifically, as shown in fig. 12, the meter support 8 is a cylindrical structure, and the secondary meter 2 is fastened to the cylindrical surface by a U-shaped fastener and then fixedly connected by a screw. The secondary instrument 2 can be preliminarily fixed by the U-shaped buckle, the quick installation of the secondary instrument 2 is facilitated, and the firm installation of the secondary instrument 2 is realized by the fixation of the screw. The specific structure of the U-shaped buckle and the specific manner of screw connection can refer to the prior art and are not limited herein.

As a specific embodiment, there are 8 combustion engine housing probes 11 and 8 combustion engine housing meters 21, where 8 combustion engine housing meters 21 are disposed on two first brackets 81, and adjacent combustion engine housing meters 21 on the same first bracket 81 are installed in a staggered manner.

As another specific example, there are 3 gas booth probes 12 and gas booth meters 22, 3 gas booth meters 22 are disposed on one second bracket 82, and adjacent gas booth meters 22 are installed in a staggered manner.

As another embodiment, the number of the excitation housing probes 13 and the number of the generator backpack probes 14 are 5, the number of the generator meters 23 corresponding to the excitation housing probes is 5, the 5 generator meters 23 are respectively arranged on two third brackets 83, and adjacent generator meters 23 on the same third bracket 83 are installed in a staggered manner. In one embodiment, the number of the excitation housing probes 13 is 3, and the number of the generator backpack probes 14 is 2, and in another embodiment, the number of the excitation housing probes 13 is 2, and the number of the generator backpack probes 14 is 3. It should be understood that the number of the excitation housing probes 13 and the generator backpack probes 14 may be set according to actual requirements, and is not limited herein.

As one example, the lead wire of the high-temperature probe 1 is electrically connected with a power supply module in the cabinet 3, and a safety device 39 is arranged between the lead wire and the power supply module. The power module comprises a first power module 32 and a second power module 34, the lead is switched to be connected with the first power module 32 or the second power module 34 through a second fast switching device 36, and the arrangement of a safety device 39 can effectively guarantee the power supply safety of the high-temperature probe 1, so that the danger caused by power supply faults is avoided.

Although the present invention is disclosed above, the present invention is not limited thereto. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.

Claims (10)

1. The utility model provides an on-line monitoring device for gas turbine power plant combustible gas leaks, its characterized in that, including high temperature probe (1), secondary instrument (2), rack (3) and combustion engine control system (4), high temperature probe (1) has a plurality of, secondary instrument (2) set up with high temperature probe (1) one-to-one, secondary instrument (2) set up in the position that is close to high temperature probe (1) be provided with the lead wire on high temperature probe (1), the lead wire is connected with rack (3) and secondary instrument (2) electricity respectively, secondary instrument (2) with combustion engine control system (4) electricity is connected.

2. The on-line monitoring device for the combustible gas leakage of the gas turbine power plant as claimed in claim 1, wherein the high temperature probe (1) comprises a gas turbine housing probe (11), a gas small-space probe (12), an excitation housing probe (13) and a generator backpack probe (14), the gas turbine housing probe (11) is arranged in a gas turbine housing wind channel (51) of the power plant, the gas small-space probe (12) is arranged in a gas small-space wind channel (61) of the power plant, the excitation housing probe (13) is arranged in a generator excitation housing (71) of the power plant, and the generator backpack probe (14) is arranged in a generator backpack of the power plant.

3. The on-line monitoring device for gas turbine power plant combustible gas leakage of claim 2, characterized in that the secondary meter (2) comprises a gas turbine shroud meter (21), a gas booth meter (22) and a generator meter (23), the gas turbine shroud meter (21) is electrically connected with the gas turbine shroud probe (11), the gas booth meter (22) is electrically connected with the gas booth probe (12), and the generator meter (23) is electrically connected with the excitation shroud probe (13) and the generator backpack probe (14).

4. The on-line monitoring device for combustible gas leakage from a gas turbine power plant of claim 3, characterized in that the on-line monitoring device further comprises an instrument holder (8), the instrument holder (8) being used for mounting the secondary instrument (2), the instrument holder (8) comprising a first holder (81), a second holder (82) and a third holder (83), the first holder (81) being provided on the gas turbine enclosure (5) for mounting the gas turbine enclosure instrument (21); the second bracket (82) is arranged on the gas booth top cover (6) and is used for mounting a gas booth instrument (22); the third support (83) is arranged on the ground close to the generator (7) and used for installing a generator instrument (23).

5. The on-line monitoring device for combustible gas leakage of a gas turbine power plant according to claim 4, characterized in that 1-4 secondary meters (2) are arranged on each meter support (8), and adjacent secondary meters (2) are installed on the same meter support (8) in a staggered manner.

6. The on-line monitoring device for combustible gas leakage in a gas turbine power plant as set forth in claim 4, wherein the meter support (8) is a cylindrical structure, and the secondary meter (2) is fastened to the cylindrical surface by a U-shaped fastener and then fixedly connected by a screw.

7. The on-line monitoring device for combustible gas leakage from a gas turbine power plant of claim 4, characterized in that there are 8 of the said engine housing probes (11) and the said engine housing meters (21), 8 of the said engine housing meters (21) are set on two first brackets (81), and the adjacent engine housing meters (21) on the same first bracket (81) are installed in a staggered manner.

8. The on-line monitoring device for combustible gas leakage in a gas turbine power plant as set forth in claim 4, wherein there are 3 of said gas booth probes (12) and gas booth meters (22), 3 of said gas booth meters (22) being disposed on a second bracket (82), and adjacent gas booth meters (22) being installed with a gap therebetween.

9. The on-line monitoring device for combustible gas leakage in a gas turbine power plant as set forth in claim 4, wherein the number of the excitation shroud probes (13) and the number of the generator backpack probes (14) are 5 in total, the number of the generator instruments (23) corresponding thereto is 5, the 5 generator instruments (23) are respectively disposed on two third brackets (83), and the adjacent generator instruments (23) on the same third bracket (83) are installed in a staggered manner.

10. The on-line monitoring device for combustible gas leakage of a gas turbine power plant according to any of claims 1-9, characterized in that the lead of the high temperature probe (1) is electrically connected with a power module in the cabinet (3), and a safety device (39) is arranged between the lead and the power module.

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