CN217212687U - Combustible gas sampling device of gas turbine - Google Patents

Abstract

The utility model provides a gas turbine combustible gas sampling device, including filter equipment, conversion equipment, detection device, blowback device and emptying devices, filter equipment passes through the sample pipeline and is connected with conversion equipment, and conversion equipment passes through first pipeline and detection device entry linkage, and conversion equipment passes through the second pipeline and is connected with detection device exit linkage, and blowback device and emptying devices are connected with conversion equipment, through a gas turbine combustible gas sampling device, can effectively reduce the dust to the influence of sample pipeline, reduce by the impact of gas under test to the probe, the function is prevented blockking up in the reinforcing, effectual reliability, the measurement accuracy and the maintenance-free period that have increased combustible gas sampling device.

Description

Combustible gas sampling device of gas turbine

Technical Field

The utility model relates to a gas turbine field particularly, relates to a gas turbine combustible gas sampling device.

Background

The gas turbine who uses at present is with combustible liquid or combustible gas as the fuel, for preventing that the combustible material from revealing at the flange, the valve, pipeline department causes explosion hazard, each generating set all needs design combustible gas detection device as required, when detecting that combustible gas concentration reaches the alarm value, promptly carry out urgent danger prevention operation, combustible gas detection device's mounted position arranges according to actual measurement demand, mainly install generating set in the pipeline department of taking a breath of each airtight space, detect the combustible gas concentration in areas such as gas turbine exhaust section, the gas turbine housing, fuel booth, and above-mentioned airtight space all has the temperature height, the dust is great, maintenance personal can't get into characteristics such as maintenance instrument during the unit operation.

Among the prior art, combustible gas detection device's measurement mode divide into two kinds from probe mounted position, firstly, probe direct mount is in high temperature region, through cable with signal transmission to control system, secondly, probe mount is outside in surveyed space, utilize gas extraction pump will be surveyed the gas and send to probe department via the sample pipeline and detect, again through cable with signal transmission to control system, directly arrange the probe in under the high temperature environment, the probe receives the strong air current of high dust for a long time and strikes, the probe life-span is generally lower, even if utilize gas extraction pump to send sample gas to probe department, the high temperature problem has been solved, nevertheless dust air current strikes probe phenomenon and still exists, easily cause the jam, influence the probe measured value.

In patent CN204346777U, relate to the setting and the use of high temperature combustible gas sampling device, and the conversion of sample gas through the cross valve gets into the jet pump, get into detection device through the effect of jet pump, but do not relate to when automatic control breaks down or the blowback is inefficacy, how to carry out the work of preventing blockking up and go on, and how to control the gaseous flow of sample, the sample gas that prevents the extraction causes the damage to detection device, in patent CN104502159A, it is easy blockked up by buggy or other dusts to relate to gaseous collection and gaseous collection in-process, be provided with the filter screen around the inside collection device of pipeline, the blowback setting has also been carried out simultaneously, but do not relate to periodic blowback, the accuracy and the reliability that easily influence detected, and there is not the evacuation pipeline, be unfavorable for the further analysis to sample gas.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a gas turbine combustible gas sampling device, so as to solve the problems of low measurement accuracy and short maintenance-free period of the sampling device in the prior art; therefore, the combustible gas detection device has the effects of higher reliability and measurement precision and prolonging the maintenance-free period.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model relates to a gas turbine combustible gas sampling device, including filter equipment, conversion equipment, detection device, blowback device and emptying devices, filter equipment passes through the sample pipeline and is connected with conversion equipment, and conversion equipment passes through first pipeline and detection device entry linkage, and conversion equipment passes through the second pipeline and is connected with the detection device exit linkage, and blowback device and emptying devices are connected with conversion equipment.

Further, the one end of sample pipeline sets up the high temperature resistant material filter screen that can dismantle for unit examines and the preventative change during overhauls, and the other end and the conversion equipment intercommunication of sample pipeline.

Further, the conversion device is a five-way valve and is used for switching between sampling and automatic back flushing.

Further, the five-way valve comprises a spring, a cavity, an electromagnetic valve, a spoon-shaped valve core, a valve body and a valve port, wherein the cavity is arranged in the valve body, the valve port is arranged on the surface of the valve body, and the valve port comprises a sampling gas inlet valve port a, a sampling gas outlet valve port b, a self-reverse blowing valve port c, a detected gas inlet valve port d and a vent port e.

Furthermore, the spoon-shaped valve core is connected with the valve body through a spring, the electromagnetic valve is arranged at one end of the valve body far away from the spring, the spoon-shaped valve core comprises a bent pipe, and the bent pipe is respectively communicated with any two of the sampling air inlet valve port a, the sampling air outlet valve port b and the self-reverse blowing valve port c through the spoon-shaped valve core.

Further, detection device is the combustible gas probe, and the combustible gas probe includes sample gas income spy mouth f and sample gas play spy mouth g, and sample gas income spy mouth f is connected with sample gas play valve mouth b through first pipeline, and sample gas goes out spy mouth g and is connected with examined gas income valve mouth d through the second pipeline.

Furthermore, a fifth stop valve, a gas extraction pump and a flow regulator are sequentially arranged on the first pipeline, the fifth stop valve is arranged at one end, close to the sampling gas outlet valve b, of the first pipeline, and the sampling gas outlet valve b is connected with one end of the first pipeline.

Furthermore, the back-blowing device comprises an automatic back-blowing pipeline and a manual back-blowing pipeline, one end of the automatic back-blowing pipeline is connected with compressed gas, and the other end of the automatic back-blowing pipeline is connected with a self-reverse blowing valve port c of the conversion device.

Furthermore, one end of the manual back-blowing pipeline is communicated with the sampling pipeline, the other end of the manual back-blowing pipeline is externally connected with high-pressure gas, the manual back-blowing pipeline is provided with a first stop valve, and one end of the manual back-blowing pipeline communicated with the sampling pipeline is arranged between a second stop valve and a third stop valve.

Further, the emptying device is an emptying pipeline, the emptying pipeline is provided with a check valve, and one end of the emptying pipeline is connected with an emptying port e and used for emptying the gas after sampling detection.

Compared with the prior art, a gas turbine combustible gas sampling device, following beneficial effect has: the influence of dust on a sampling pipeline can be effectively reduced, the impact of the measured gas on the probe is reduced, the anti-blocking function is enhanced, and the reliability, the measurement precision and the maintenance-free period of the combustible gas sampling device are effectively increased.

Drawings

Some of the figures that make up the present invention are intended to provide a further understanding of the invention, and the illustrative embodiments and descriptions thereof are intended to explain the present invention and not to constitute an undue limitation on the invention. In the drawings:

FIG. 1 is a schematic plan view of an anti-clogging device for a gas sampling pipe of a gas turbine;

FIG. 2 is a schematic diagram of the five-way valve configuration (solenoid energized);

fig. 3 is a schematic diagram of the structure of the five-way valve (solenoid valve is not energized).

Description of reference numerals: 1. a valve; 11. a first shut-off valve; 12. a second stop valve; 13. a third stop valve; 14. a fourth stop valve; 15. a fifth stop valve; 16. a check valve; 2. asbestos filter screens; 21. a sampling pipeline; 22. a first pipeline; 23. a second pipeline; 3. a five-way valve; 31. a spring; 32. a chamber; 33. an electromagnetic valve; 34. a spoon-shaped valve core; 341. bending the pipe; 35. a valve body; 4. a combustible gas probe; 5. automatic back flushing of the pipeline; 6. evacuating the line; 7. manually blowback the pipeline; 8. a gas extraction pump; 9. a flow regulator; a. sampling gas enters the valve port; b. a sampling gas outlet valve; c. blowing in the valve port from the reverse direction; d. the detected gas enters the valve port; e. emptying the air; f. the sample gas enters the probe; g. the sample gas is discharged from the probe.

Detailed Description

The inventive concepts of the present disclosure will be described hereinafter using terms commonly employed by those skilled in the art to convey the substance of their work to others skilled in the art. These utility concepts may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The embodiment is directed to a sampling device for high-temperature combustible gas, and the sampling device is the same as a conventional combustible gas sampling device in that the whole structure is composed of a pipeline, a valve and a detection device.

In the prior art, combustible gas detection device's measurement mode divide into two kinds from the probe mounted position, firstly, probe direct mount is in high temperature region, secondly, the probe mounting is outside in surveyed space, utilize the gas extraction pump will be surveyed the gas and send to probe department via the sampling pipeline and detect, directly arrange the probe in under the high temperature environment, the probe receives the strong air current impact of high dust for a long time, the probe life-span is generally lower, even if utilize the gas extraction pump to send the sampling gas to probe department, the high temperature problem has been solved, nevertheless dust air current strikes probe phenomenon still exists, easily cause the jam, influence the probe measured value, some sampling device utilize and carry out the blowback on the basis of sampling pipeline itself and prevent blockking up, some dust jam's problem has been solved, nevertheless when pipeline trouble or blowback became invalid, still easily influence check out of survey equipment's measurement.

In order to solve the problems of short maintenance-free period, insufficient detection reliability and detection precision of a sampling device in the prior art, the embodiment provides a combustible gas sampling device of a gas turbine, as shown in fig. 1, the sampling device comprises a filtering device, a conversion device, a detection device, a back flushing device and an emptying device, the filtering device is connected with the conversion device through a sampling pipeline 21, the conversion device is connected with an inlet of the detection device through a first pipeline 22, the conversion device is connected with an outlet of the detection device through a second pipeline 23, one end of the sampling pipeline 21 is provided with a detachable high-temperature resistant material filter screen, such as an asbestos filter screen 2, and the sampling pipeline 21 can be inspected and replaced periodically during unit maintenance, the other end of the sampling pipeline 21 is connected with the conversion device, and the back flushing device and the emptying device are connected with the conversion device.

Each part of the interact of sampling device is favorable to improving sampling device's anti-clogging ability, improves test probe's precision and reliability, can dismantle the filter screen and be favorable to reducing the frequency of sampling device maintenance, promotes the cycle of exempting from the maintenance, increases sampling device's stability.

The filter equipment is high temperature resistant asbestos filter screen 2, asbestos filter screen 2 passes through sampling pipeline 21 and is connected with five-way valve 3, asbestos filter screen 2 and the bolted connection of one end of sampling pipeline 21 for filter the dust that gas turbine during operation produced, sampling pipeline 21 adopts the stainless steel pipe that the diameter is greater than or equal to 6 nm.

Asbestos filter screen 2 has high temperature resistance's characteristic, can work in 300 ℃ of the environment for a long time, and asbestos filter screen 2 and sample pipeline 21's the combination of dismantling have made things convenient for sample pipeline 21 to the change of filter screen, when also being favorable to the unit to overhaul, to the inspection and the preventive change of filter screen.

The switching device is a five-way valve 3, the five-way valve 3 is connected with one end of a sampling pipeline 21 through a sampling gas inlet valve port a by bolts and is used for switching between sampling and automatic back blowing, a second stop valve 12 and a third stop valve 13 are arranged on the sampling pipeline 21, the second stop valve 12 is arranged at one end of the sampling pipeline 21 close to the asbestos filter screen 2, as shown in figure 2-3, the five-way valve 3 comprises a spring 31, a chamber 32, an electromagnetic valve 33, a spoon-shaped valve core 34, a valve body 35 and valve ports, a chamber (32) is arranged in the valve body (35), the surface of the valve body (35) is provided with the valve ports, the spoon-shaped valve core 34 is connected with the valve body 35 through the spring 31, the electromagnetic valve 33 is arranged at one end of the valve body 35 far away from the spring 31, the spoon-shaped valve core 34 comprises an elbow 341, the elbow 341 is respectively communicated with any two valve ports of the sampling gas inlet valve port a, the sampling gas outlet valve port b and a self-reverse blowing-in valve port c through the spoon-shaped valve core 34, the valve port comprises a sampling gas inlet valve port a, a sampling gas outlet valve port b, a self-reverse blowing-in valve port c, a detected gas inlet valve port d and a drain port e.

The electromagnetic valve 33 is a single-acting electromagnetic valve, and is powered on and powered off under the action of the control device, when not powered on, two ends of the bent tube 341 of the spoon-shaped valve core 34 are respectively communicated with the sampling gas inlet valve port a and the self-reverse blowing-in valve port c, and enter a reverse blowing state, when powered on, two ends of the bent tube 341 of the spoon-shaped valve core 34 are respectively communicated with the sampling gas inlet valve port a and the sampling gas outlet valve port b, the spoon-shaped valve core 34 plugs the self-reverse blowing-in valve port c, and enters the sampling state, the control device can set a reverse blowing time and a reverse blowing interval through a signal instruction, in this embodiment, the control device is a device for performing instruction control on the electromagnetic valve 33, the reverse blowing time set by the control device is 5 seconds, and the reverse blowing interval is 2 minutes.

The normal detection of sampling device can be carried out when 3 circular telegrams of five-way valve, carries out automatic blowback when not circular telegrams and prevents blockking up, is favorable to providing certain cushion time for probe detection part, and the dust on the blowback state clearance filter screen is favorable to improving probe measuring accurate nature and reliability, prevents effectively that the detection device measuring value that the dust jam leads to is low on the low side to lead to the unit to arrange the condition of dangerous state in.

The detection device is a combustible gas probe 4, the combustible gas probe 4 comprises a sample gas inlet port f and a sample gas outlet port g, the sample gas inlet port f is communicated with a sample gas outlet valve port b through a first pipeline 22, the sample gas outlet port g is communicated with a detected gas inlet valve port d through a second pipeline 23, a fifth stop valve 15, a gas extraction pump 8 and a flow regulator 9 are sequentially arranged on the first pipeline 22, the fifth stop valve 15 is arranged at one end, close to the sample gas outlet valve port b, of the first pipeline 22, the sample gas outlet valve port b is connected with one end of the first pipeline 22 through a bolt, and the detected gas inlet valve port d is connected with one end of the second pipeline 23 through a bolt.

When the electromagnetic valve 33 in the five-way valve 3 is powered on, the spoon-shaped valve core 34 is communicated with the sampling gas inlet valve port a and the sampling gas outlet valve port b to perform sampling detection, the self-circulation of the detection device is interrupted, when the electromagnetic valve 33 in the five-way valve 3 is powered off, the spoon-shaped valve core 34 is communicated with the sampling gas inlet valve port a and the self-reverse blowing valve port c to perform automatic reverse blowing state, the detection device forms self-circulation in the cavity 32, and gas sequentially passes through the sampling gas outlet valve port b, the detection device, the detected gas inlet valve port d and the cavity 32 to perform self-circulation.

The fifth stop valve 15 is used for controlling the sampled gas to enter the detection device, and after the unit is shut down, the gas extraction pump 8 and the combustible gas probe 4 are safely isolated, the explosion-proof level of the gas extraction pump 8 is at least Ex (ia) IICT 3, which is used for extracting the gas to be detected to the combustible gas probe 4, the flow regulator 9 is used for controlling the flow of the gas to be detected, so that the sampled gas keeps stable and continuous flowing to the combustible gas probe 4, the impact on the combustible gas probe 4 is reduced, the combustible gas probe 4 is used for detecting the combustible gas concentration of the pipeline to be detected, corresponding signals are sent out according to the change of the concentration, when the concentration of the combustible gas reaches an alarm value, the emergency danger avoiding operation is timely carried out, in the embodiment, Ex (ia) IICT 3 is in accordance with the explosion-proof standard, ia is in accordance with an ia-level intrinsic safety explosion-proof method, IIC is allowed to relate to IIC type explosive gas, t3 refers to the surface temperature of safe object is less than or equal to 200 deg.C, and 36 kinds of common explosive gases are gasoline, crotonaldehyde, etc.

Detection device's self-loopa is favorable to reducing the impact of sample gas to combustible gas probe 4 among the sampling process, and gas extraction pump 8 is favorable to protecting combustible gas probe 4, is favorable to extracting more sample gas simultaneously for detection rate, flow regulator 9 is favorable to improving stability and the precision that combustible gas probe 4 detected, guarantees the gaseous steady continuous flow direction combustible gas probe 4 of sample.

The back-blowing device comprises an automatic back-blowing pipeline 5 and a manual back-blowing pipeline 7, one end of the automatic back-blowing pipeline 5 is connected with compressed gas, the other end of the automatic back-blowing pipeline 5 is connected with a self-back-blowing valve port c through a bolt, the automatic back-blowing pipeline 5 is provided with a fourth stop valve 14, the automatic back-blowing pipeline 5 is used for realizing regular back-blowing through the switching of a five-way valve under the normal state, one end of the manual back-blowing pipeline 7 is communicated with a sampling pipeline 21, the manual back-blowing pipeline 7 is provided with a first stop valve 11, when the manual back-blowing pipeline 7 is not started, the first stop valve 11 is closed, one end of the manual back-blowing pipeline 7 communicated with the sampling pipeline 21 is arranged between a second stop valve 12 and a third stop valve 13, the other end of the manual back-blowing pipeline 7 is externally connected with high-pressure gas of 2MPa-4MPa for manually opening the first stop valve 11 and closing the third stop valve 13 when the five-way valve 3 is automatically back-blown ineffective, and manually back-blowing the asbestos filter screen 2.

The use that automatic blowback and manual blowback combined together is favorable to improving the anti-clogging performance of sampling pipeline 21, and the automatic regular blowback of five-way valve 3 guarantees that asbestos filter screen 2 department dust volume reduces, improves and detects the precision, and when the automatic blowback of five-way valve 3 is invalid, manual blowback can further effectual reduction dust gather the harm that brings, improves the reliability that detects, maintains the safe operation of unit, improves detection device's detection efficiency.

The emptying device is an emptying pipeline 6, the emptying pipeline 6 is provided with a check valve 16, one end of the emptying pipeline 6 is in bolt connection with an emptying port e of the conversion device, the check valve 16 is a one-way check valve and is closed in a normal state, the check valve is communicated when the internal pressure is higher than the external pressure, and gas after sampling detection is emptied.

The emptying device is provided with and does benefit to the gaseous processing after improving the sampling test, and harmless gas can directly discharge to the atmosphere in, and other gases can get rid of after collecting the filter equipment effect, discharge again, are favorable to the environmental protection, prevent that impurity from getting into by the measuring pipeline, influence the normal operating of unit, improve sampling device's security and reliability.

The utility model discloses in, to arbitrary combustible gas sampling device, can include in this embodiment combustible gas detects the structure, and on the basis of the correlation structure and the assembled relation of the combustible gas sampling device that this embodiment provided, sampling device still includes the conventional component including valve 1, bolt isotructure, in view of it is prior art, does not give unnecessary details here.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a gas turbine combustible gas sampling device, its characterized in that includes filter equipment, conversion equipment, detection device, blowback device and emptying devices, and filter equipment passes through sample pipeline (21) and is connected with conversion equipment, and conversion equipment passes through first pipeline (22) and is connected with detection device entry, and conversion equipment passes through second pipeline (23) and is connected with detection device exit, and blowback device and emptying devices are connected with conversion equipment.

2. A gas turbine combustible gas sampling device according to claim 1, characterized in that one end of the sampling pipe (21) is provided with a detachable high temperature resistant material filter screen for inspection and preventive replacement during unit maintenance, and the other end of the sampling pipe (21) is communicated with the conversion device.

3. A gas turbine combustible gas sampling device according to claim 1, characterized in that the switching means is a five-way valve (3) for switching between sampling and automatic blow-back.

4. The combustible gas sampling device of the gas turbine according to claim 3, wherein the five-way valve (3) comprises a spring (31), a chamber (32), an electromagnetic valve (33), a spoon-shaped valve core (34), a valve body (35) and a valve port, the chamber (32) is arranged in the valve body (35), the valve port is arranged on the surface of the valve body (35), and the valve port comprises a sample gas inlet valve port (a), a sample gas outlet valve port (b), a self-reverse blowing valve port (c), a detected gas inlet valve port (d) and a vent port (e).

5. The combustible gas sampling device of the gas turbine according to claim 4, wherein the scoop-shaped valve core (34) is connected with the valve body (35) through the spring (31), the electromagnetic valve (33) is arranged at one end of the valve body (35) far away from the spring (31), the scoop-shaped valve core (34) comprises an elbow (341), and the elbow (341) is respectively communicated with any two of the sample gas inlet valve port (a), the sample gas outlet valve port (b) and the self-reverse blowing valve port (c) through the scoop-shaped valve core (34).

6. A gas turbine combustible gas sampling device according to claim 4, characterized in that the detection device is a combustible gas probe (4), the combustible gas probe (4) comprises a sample gas inlet (f) and a sample gas outlet (g), the sample gas inlet (f) is communicated with the sample gas outlet (b) through a first pipeline (22), and the sample gas outlet (g) is connected with the detected gas inlet (d) through a second pipeline (23).

7. The combustible gas sampling device for the gas turbine according to claim 6, wherein a fifth stop valve (15), a gas extraction pump (8) and a flow regulator (9) are sequentially arranged on the first pipeline (22), the fifth stop valve (15) is arranged at one end of the first pipeline (22) close to the sampling gas outlet valve (b), and the sampling gas outlet valve (b) is connected with one end of the first pipeline (22).

8. The combustible gas sampling device of the gas turbine according to claim 1, wherein the back-blowing device comprises an automatic back-blowing pipeline (5) and a manual back-blowing pipeline (7), one end of the automatic back-blowing pipeline (5) is connected with the compressed gas, and the other end of the automatic back-blowing pipeline (5) is connected with a self-back-blowing valve port (c) of the switching device.

9. The combustible gas sampling device of the gas turbine according to claim 8, wherein one end of the manual blowback pipeline (7) is communicated with the sampling pipeline (21), the other end of the manual blowback pipeline (7) is externally connected with high-pressure gas, the manual blowback pipeline (7) is provided with a first stop valve (11), and one end of the manual blowback pipeline (7) communicated with the sampling pipeline (21) is arranged between a second stop valve (12) and a third stop valve (13).

10. The combustible gas sampling device of the gas turbine according to claim 1, wherein the evacuation device is an evacuation pipeline (6), the evacuation pipeline (6) is provided with a check valve (16), and one end of the evacuation pipeline (6) is connected with an evacuation port (e) of the conversion device and is used for evacuating gas after sampling detection.

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