CN216715877U - Prevent gas turbine valve control device of leakage - Google Patents
Prevent gas turbine valve control device of leakage Download PDFInfo
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- CN216715877U CN216715877U CN202220151571.5U CN202220151571U CN216715877U CN 216715877 U CN216715877 U CN 216715877U CN 202220151571 U CN202220151571 U CN 202220151571U CN 216715877 U CN216715877 U CN 216715877U
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Abstract
The utility model discloses a leakage-proof gas turbine valve control device, which is characterized in that: including controller, gas shutoff valves, gas pressure valves, gas flow valves, gas discharge valve and pressure transmitter, gas shutoff valves, gas pressure valves and gas flow valves connect gradually, gas shutoff valves includes a plurality of gas shutoff valves through pipeline series connection in proper order, gas discharge valve connects respectively at the end of giving vent to anger of each gas shutoff valve and the end of giving vent to anger of gas pressure valves, pressure transmitter connects respectively at the inlet end of each gas discharge valve, the controller is connected with gas shutoff valve, gas pressure valves, gas discharge valve and pressure transmitter respectively. The utility model can realize the online air tightness detection of the control valve of the gas turbine, and the gas turbine is started to operate under the condition that the detection is passed, thereby providing reliable guarantee for the safe operation of the gas turbine.
Description
Technical Field
The utility model belongs to the technical field of gas turbines, and particularly relates to a leakage-proof gas turbine valve control device.
Background
In the key technology of the gas turbine, a control valve of the gas turbine is particularly important, and the gas turbine controls the fuel quantity entering the gas turbine through the control valve to realize different working conditions of the gas turbine such as acceleration, load and the like. When an emergency condition occurs, the control valve needs to cut off the gas immediately so as to ensure the safety of the gas turbine. Because the flowing medium of the gas turbine control valve is natural gas, if leakage occurs due to untight valve seal, the leaked natural gas brings great potential safety hazard to the operation of the gas turbine, the gas turbine control valve has strict requirements on the leakage grade during design and manufacture, and the leakage grade of the gas turbine control valve is generally required to be ANSI CLASS V grade or higher VI grade.
In the prior art, after the gas turbine control valve is put into operation, the valve is removed by a valve manufacturing plant back to the plant for leak inspection of the valve during the gas turbine shutdown maintenance period. Along with the operation of the gas turbine, the valve frequently acts, the aging of the sealing surface of the valve, the existence of particles on the sealing surface and other factors, the control valve may be not tightly sealed, and the gas turbine is not in the shutdown maintenance period at the moment, no effective means is provided for detecting the air tightness of the valve, if the gas turbine is started to operate and gas leakage occurs due to the poor sealing of the valve at the moment, great potential safety hazards are brought to the operation of the gas turbine.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects that the existing gas turbine control valve has no effective means to detect the air tightness of the valve in actual operation and the valve is not tightly sealed possibly, so that potential safety hazards are brought to the operation of the gas turbine.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
a leak-proof gas turbine valve control apparatus, comprising: including controller, gas shutoff valves, gas pressure valves, gas flow valves, gas discharge valve and pressure transmitter, gas shutoff valves, gas pressure valves and gas flow valves connect gradually, gas shutoff valves includes a plurality of gas shutoff valves through pipeline series connection in proper order, gas discharge valve connects respectively at the end of giving vent to anger of each gas shutoff valve and the end of giving vent to anger of gas pressure valves, pressure transmitter connects respectively at the inlet end of each gas discharge valve, the controller is connected with gas shutoff valve, gas pressure valves, gas discharge valve and pressure transmitter respectively.
The gas shutoff valve group comprises a gas shutoff valve A, a gas shutoff valve B and a gas shutoff valve C, the gas discharge valve comprises a gas discharge valve A, a gas discharge valve B, a gas discharge valve C and a gas discharge valve D, and the number of the pressure transmitters is four; the gas discharge valve A, the gas discharge valve B and the gas discharge valve C are respectively connected to the gas outlet ends of the gas shutoff valve A, the gas shutoff valve B and the gas shutoff valve C, the gas discharge valve D is connected to the gas outlet end of the gas pressure valve bank, and the four pressure transmitters are respectively connected to the gas inlet ends of the gas discharge valve A, the gas discharge valve B, the gas discharge valve C and the gas discharge valve D.
The gas pressure valve group comprises a gas pressure valve A and a gas pressure valve B which are arranged in parallel.
The gas flow valve group comprises a gas flow valve A, a gas flow valve B and a gas pilot flow valve which are arranged in parallel.
By adopting the technical scheme, the utility model has the beneficial technical effects that:
1. the valve control device comprises a controller, a gas shutoff valve group, a gas pressure valve group, a gas flow valve group, a gas discharge valve and a pressure transmitter, and can be used for detecting the air tightness of each control valve before starting the gas turbine. In addition, the utility model also completes the check of the valve action command and the position feedback signal while detecting the valve air tightness, and the detection method has double functions.
2. The air tightness detection function of the utility model can be automatically completed by the controller in sequence, and the utility model has the advantages of accurate detection result and high automation degree.
3. The pressure transmitter for detection is high-precision and quick-response, has an explosion-proof function, and improves the reliability of online detection.
4. The utility model adopts a pressure monitoring mode to detect the air tightness, has strong universality and can realize nondestructive detection.
Drawings
FIG. 1 is a schematic diagram (1) illustrating the states of valves in the on-line detection of the airtightness of the valves according to the present invention;
FIG. 2 is a schematic diagram (2) illustrating the states of the valves during the on-line detection of the airtightness of the valves according to the present invention;
FIG. 3 is a schematic diagram (3) illustrating the states of the valves during the on-line detection of the airtightness of the valves according to the present invention;
FIG. 4 is a schematic diagram (4) illustrating the states of the valves during the on-line detection of the airtightness of the valves according to the present invention;
FIG. 5 is a schematic diagram (5) illustrating the states of the valves during the on-line detection of the airtightness of the valves according to the present invention;
FIG. 6 is a schematic diagram (6) illustrating the states of the valves during the on-line detection of the airtightness of the valves according to the present invention;
FIG. 7 is a schematic diagram (7) illustrating the states of the valves during the on-line detection of the airtightness of the valves according to the present invention;
FIG. 8 is a schematic diagram (8) illustrating the states of the valves during the on-line detection of the airtightness of the valves according to the present invention;
FIG. 9 is a schematic diagram (9) illustrating the states of the valves during the on-line detection of the airtightness of the valves according to the present invention;
FIG. 10 is a schematic view (10) illustrating the states of valves in the on-line detection of the airtightness of the valves according to the present invention;
FIG. 11 is a schematic view (11) illustrating the status of each valve when the valve airtightness is detected on line according to the present invention;
fig. 12 is a schematic diagram (12) illustrating the states of the valves when the airtightness of the valves is detected on line according to the present invention.
Detailed Description
The utility model discloses a leakage-proof gas turbine valve control device which can realize online air tightness detection of a gas turbine control valve so as to start and operate the gas turbine after the air tightness detection of the valve is passed, and provide reliable guarantee for safe operation of the gas turbine. Specifically, the device includes that controller, gas turn-off valves, gas pressure valves, gas flow valves, gas discharge valve and pressure transmitter turn-off valves, gas pressure valves and gas flow valves connect gradually, the gas turn-off valves include a plurality of gas turn-off valves that are connected in series in proper order through the pipeline, the gas discharge valve is connected respectively at the end of giving vent to anger of each gas turn-off valve and the end of giving vent to anger of gas pressure valves, pressure transmitter connects respectively at the inlet end of each gas discharge valve, the controller is connected with gas turn-off valves, gas pressure valves, gas discharge valve and pressure transmitter respectively. The gas shutoff valve is used for cutting off fuel under emergency working conditions, the gas exhaust valve is used for emptying residual natural gas in a pipeline when the gas turbine is stopped, the gas pressure valve bank is used for controlling the pressure of the natural gas entering the gas turbine, and the gas flow valve bank is used for controlling the flow of the natural gas entering the gas turbine.
The utility model further describes the controller, the gas shutoff valve group, the gas pressure valve group, the gas flow valve group, the gas discharge valve and the pressure transmitter, as follows:
the controller is a core component of the device, and the controller is an independent brand of eastern automatic electric control engineering company Limited and has the model of D-DPU 01. The controller is internally preset with the conventional control program, and the automatic opening and closing of all the valves and the online detection of the air tightness are realized by the control program preset in the controller.
The gas shutoff valve group comprises a plurality of gas shutoff valves, the gas shutoff valves are hydraulic valves, and the codes are MBP01-AA704, MBP02-AA701 and MBP02-AA 703. The number of the gas shutoff valves is preferably three, and the gas shutoff valves are a gas shutoff valve A, a gas shutoff valve B and a gas shutoff valve C respectively. The reason for providing three gas shutoff valves is that, on the one hand, the complexity of the structure and the cost increase of the device can be avoided, and on the other hand, effective detection of the airtightness of each valve can be realized.
The gas discharge valve is a hydraulic valve and is coded as MBP01-AA706, MBP02-AA702, MBP02-AA705 and MBP02-AA 706. The number of the gas discharge valves is preferably four, namely a gas discharge valve A, a gas discharge valve B, a gas discharge valve C and a gas discharge valve D, and the four gas discharge valves are used for respectively discharging gas.
The pressure transmitters are of a river crossing explosion-proof high-precision series, the models of the pressure transmitters are EJA430E-JBS5G-717DD/NF2/D1/HAC, the number of the pressure transmitters is preferably four, and the four pressure transmitters are used for detecting pressure and further judging whether the air tightness of the valve is intact.
The gas pressure valve group comprises two gas pressure valves, the two gas pressure valves are a gas pressure valve A and a gas pressure valve B respectively, and the gas pressure valve A and the gas pressure valve B are arranged between a gas shutoff valve group and a gas flow valve group in parallel. The code of the gas pressure valve is as follows: MBP02-AA711 and MBP02-AA 712.
The gas flow valves include three gas flow valves, and three gas flow is gas flow valve A, gas flow valve B and gas guide flow valve respectively, and gas flow valve A, gas flow valve B and gas guide flow valve parallel connection are at the end of giving vent to anger of gas pressure valves. The codes of the gas flow valve A, the gas flow valve B and the gas pilot flow valve are MBP02-AA713, MBP02-AA723 and MBP02-AA 733.
Further, gas discharge valve A, gas discharge valve B and gas discharge valve C are connected respectively at the end of giving vent to anger of gas shutoff valve A, gas shutoff valve B and gas shutoff valve C, gas discharge valve D is connected at the end of giving vent to anger of gas pressure valves, and four pressure transmitter are connected respectively at the inlet end of gas discharge valve A, gas discharge valve B, gas discharge valve C and gas discharge valve D.
In order to facilitate the description, the applicant sets the controller to TCS and the four pressure transducers PT1, PT2, PT3 and PT4 respectively as follows:
as shown in fig. 1, the gas turbine is in a state ready for startup. Under the condition that all the gas discharge valves are closed, natural gas sequentially passes through the gas shutoff valve A, the gas shutoff valve B, the gas shutoff valve C, the gas pressure valve and the gas flow valve and enters the gas turbine to do work. The detection is divided into four sections and adopts a sequential control mode. When the gas turbine is shut down, the gas shutoff valve A, the gas shutoff valve B, the gas shutoff valve C, the gas pressure valve A, the gas pressure valve B, the gas flow valve A, the gas flow valve B and the gas pilot flow valve are at closed positions, the gas exhaust valve A, the gas exhaust valve B, the gas exhaust valve C and the gas exhaust valve D are at open positions, and the pressure transmitter value PT1= PT2= PT3= PT4= 0.
As shown in fig. 2, before the gas turbine is started, a first stage of airtightness detection is performed for detecting airtightness of the gas shutoff valve a, the gas shutoff valve B, and the gas discharge valve a. The controller sends a closing instruction to the gas discharge valve A, the gas discharge valve A executes a closing action and feeds a closing position state signal back to the controller, the closing execution time is within 1 second, the controller continues to execute the next flow, and otherwise, the controller sends an alarm and stops detection.
As shown in fig. 3, after the gas discharge valve a is closed, the controller sends an opening instruction to the gas shutoff valve a, the gas shutoff valve a performs an opening action, and feeds back an opening position state signal to the controller, the time for performing opening is within 1 second, the controller continues to perform the next process, otherwise, the controller sends an alarm, and detection is stopped. After the gas shutoff valve A is opened, the pressure in the pipeline is detected by the pressure transmitter PT1 to be communicated with the gas supply pressure of the natural gas, and the value of the pressure transmitter PT1 is increased to the gas supply pressure of the natural gas, namely the pressure transmitter PT1= the gas supply pressure. If the value of the pressure transmitter PT1 does not reach the natural gas supply pressure, the controller gives an alarm and stops detection.
As shown in fig. 4, after the value of the pressure transmitter PT1 reaches the air supply pressure, the controller sends a closing instruction to the gas shutoff valve a, the gas shutoff valve a performs a closing action, and feeds back a closing position state signal to the controller, the time for performing the closing is within 1 second, the controller continues to perform the next process, otherwise, the controller sends an alarm to stop the detection. After the gas shutoff valve A is closed, the pressure value of the pressure transmitter PT1 is monitored, and if the value of the pressure transmitter PT1 is reduced to a certain fixed value within the preset time, the controller gives an alarm and stops detection. And if the pressure of the pressure transmitter PT1 does not drop within a preset time period, completing the gas tightness detection of the gas shutoff valve A, the gas shutoff valve B and the gas discharge valve A, and continuously executing the second section of gas tightness detection.
As shown in fig. 5, a second stage of airtightness detection is performed for detecting the airtightness of the gas shutoff valve C and the gas discharge valve B. The controller sends a closing instruction to the gas discharge valve B, the gas discharge valve B executes a closing action and feeds a closing position state signal back to the controller, the closing execution time is within 1 second, the controller continues to execute the next flow, and otherwise, the controller sends an alarm and stops detection.
As shown in fig. 6, after closing of the gas discharge valve B is completed, the controller sends an opening instruction to the gas shutoff valve B, the gas shutoff valve B performs an opening action, and feeds back an opening position state signal to the controller, the time for performing opening is within 1 second, the controller continues to perform the next process, otherwise, the controller sends an alarm, and detection is stopped. After the gas shutoff valve B is opened, a pipeline detected by the pressure transmitter PT2 is communicated with a pipeline detected by the pressure transmitter PT1, the numerical value of the pressure transmitter PT2 is increased to be the same as that of the pressure transmitter PT1, namely PT2= PT1, otherwise, the controller gives an alarm and stops detection. When PT2= PT1, the pressure value of pressure transmitter PT2 is monitored, and if the value of pressure transmitter PT2 falls to a certain fixed value within a preset time, the controller gives an alarm and stops detection. And if the pressure of the pressure transmitter PT2 is not reduced within a preset time period, completing the gas tightness detection of the gas shutoff valve C and the gas discharge valve B, and continuing to execute the third section of gas tightness detection.
As shown in fig. 7, a third stage airtightness test is performed for testing the airtightness of the gas pressure valve a, the gas pressure valve B and the gas discharge valve C. The controller sends a closing instruction to the gas discharge valve C, the gas discharge valve C executes a closing action and feeds a closing position state signal back to the controller, the closing execution time is within 1 second, the controller continues to execute the next flow, and otherwise, the controller sends an alarm and stops detection. After closing of the gas discharge valve C is completed, the controller sends an opening instruction to the gas shutoff valve C, the gas shutoff valve C executes opening action and feeds back an opening position state signal to the controller, the time for executing opening is within 1 second, the controller continues to execute the next process, and otherwise, the controller sends an alarm and stops detection. After the gas shutoff valve C is opened, a pipeline detected by the pressure transmitter PT3 is communicated with pipelines detected by the pressure transmitter PT1 and the pressure transmitter PT2, the numerical value of the pressure transmitter PT3 is increased to be the same as that of the pressure transmitter PT1 and the pressure transmitter PT2, namely PT3= PT2= PT1, otherwise, the controller gives an alarm and stops detection. When PT3= PT2= PT1, the pressure value of pressure transmitter PT3 is monitored, and if the value of pressure transmitter PT3 drops to a certain fixed value within a preset time, the controller gives an alarm and stops detection. If the pressure of the pressure transmitter PT3 does not drop within the preset time period, the gas tightness detection of the gas pressure valve A, the gas pressure valve B and the gas discharge valve C is completed, and the fourth stage of gas tightness detection is continuously executed.
As shown in fig. 8, a fourth stage of gas tightness detection is performed for detecting the gas tightness of the gas flow valve a, the gas flow valve B, the gas pilot flow valve, and the gas discharge valve D. The controller sends a closing instruction to the gas discharge valve D, the gas discharge valve D executes a closing action and feeds a closing position state signal back to the controller, the closing execution time is within 1 second, the controller continues to execute the next flow, and otherwise, the controller sends an alarm and stops detection. After closing of the gas discharge valve D is completed, the controller sends an opening instruction to the gas pressure valve A, the gas pressure valve A executes opening action and feeds back an opening position state signal to the controller, the time for executing opening is within 2 seconds, the controller continues to execute the next process, and otherwise, the controller sends out an alarm and stops detection. After the gas pressure valve A is opened, a pipeline detected by the pressure transmitter PT4 is communicated with a pipeline detected by the pressure transmitter PT1, the pressure transmitter PT2 and the pressure transmitter PT3, the numerical value of the pressure transmitter PT4 is increased to be the same as the numerical value of the pressure transmitter PT1, the pressure transmitter PT2 and the pressure transmitter PT3, namely PT4= PT3= PT2= PT1, otherwise, the controller alarms and stops detection. When PT4= PT3= PT2= PT1, the pressure value of pressure transmitter PT4 is monitored, and if the value of pressure transmitter PT4 drops to a certain value within a preset time, the controller gives an alarm and stops detection. And if the pressure of the pressure transmitter PT4 is not reduced within a preset time period, completing the airtightness detection of the gas flow valve A, the gas flow valve B, the gas pilot flow valve and the gas discharge valve D, and continuously executing the integral detection.
As shown in fig. 9, the controller sends a closing instruction to the gas pressure valve a, the gas shutoff valve B, and the gas shutoff valve C, the gas pressure valve a, the gas shutoff valve B, and the gas shutoff valve C perform closing actions, and feed back a closing position state signal to the controller, wherein the closing time of the gas shutoff valve B and the gas shutoff valve C is within 1 second, the closing time of the gas pressure valve a is within 2 seconds, the controller continues to execute the next process, otherwise, the controller sends an alarm, and stops detection. In the state that all valves are closed, PT4= PT3= PT2= PT1, if the values of the pressure transmitter PT1, the pressure transmitter PT2, the pressure transmitter PT3 and the pressure transmitter PT4 are different within the preset time, the controller gives an alarm and stops detection. And if the PT4= PT3= PT2= PT1, the detection of the whole airtightness of all the valves is completed, and the recovery procedure is continuously executed.
As shown in fig. 10, in a state where all the valves are closed, the controller sends an opening instruction to the gas discharge valve D, the gas discharge valve D performs an opening operation, and feeds back an opening position state signal to the controller, the time for the gas discharge valve D to perform opening is within 1 second, the controller continues to perform the next process, otherwise, the controller sends an alarm, and detection is stopped. When the gas discharge valve D is opened, PT4=0, PT3= PT2= PT1= gas supply pressure, if the value of the pressure transmitter PT4 does not drop to 0 within the preset time, the controller gives an alarm and stops detection. PT4=0, PT3= PT2= PT1= air supply pressure, and the recovery routine is continued.
As shown in fig. 11, the controller sends an opening instruction to the gas discharge valve C, the gas discharge valve C performs an opening action, and feeds back an opening position state signal to the controller, the time for the gas discharge valve C to perform opening is within 1 second, the controller continues to perform the next process, otherwise, the controller sends an alarm, and the detection is stopped. When the gas discharge valve C is opened, PT4= PT3=0, PT2= PT1= gas supply pressure, if the value of the pressure transmitter PT3 does not drop to 0 within the preset time, the controller gives an alarm and stops detection. PT4= PT3=0, PT2= PT1= the air supply pressure, and the recovery routine is continued.
As shown in fig. 12, the controller sends an opening instruction to the gas discharge valve B, the gas discharge valve B performs an opening action, and feeds back an opening position state signal to the controller, the time for the gas discharge valve B to perform opening is within 1 second, the controller continues to perform the next process, otherwise, the controller sends an alarm, and stops detection. When the gas discharge valve B is opened, PT4= PT3= PT2=0, PT1= the gas supply pressure, if the value of the pressure transmitter PT2 does not drop to 0 within the preset time, the controller gives an alarm and stops detection. PT4= PT3= PT2=0, PT1= air supply pressure, and the airtightness detection of all the valves is completed completely.
While the utility model has been described with reference to specific embodiments, any feature disclosed in this specification may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise; all of the disclosed features, or all of the method or process steps, may be combined in any combination, except mutually exclusive features and/or steps.
Claims (4)
1. A leak-proof gas turbine valve control apparatus, comprising: including controller, gas shutoff valves, gas pressure valves, gas flow valves, gas discharge valve and pressure transmitter, gas shutoff valves, gas pressure valves and gas flow valves connect gradually, gas shutoff valves includes a plurality of gas shutoff valves through pipeline series connection in proper order, gas discharge valve connects respectively at the end of giving vent to anger of each gas shutoff valve and the end of giving vent to anger of gas pressure valves, pressure transmitter connects respectively at the inlet end of each gas discharge valve, the controller is connected with gas shutoff valve, gas pressure valves, gas discharge valve and pressure transmitter respectively.
2. A leak resistant gas turbine valve control apparatus as set forth in claim 1 wherein: the gas shutoff valve group comprises a gas shutoff valve A, a gas shutoff valve B and a gas shutoff valve C, the gas discharge valve comprises a gas discharge valve A, a gas discharge valve B, a gas discharge valve C and a gas discharge valve D, and the number of the pressure transmitters is four; wherein, gas vent valve A, gas vent valve B and gas vent valve C are connected respectively at gas shutoff valve A, gas shutoff valve B and gas shutoff valve C's the end of giving vent to anger, and gas vent valve D connects the end of giving vent to anger at gas pressure valves group, and four pressure transmitter connect respectively at gas vent valve A, gas vent valve B, gas vent valve C and gas vent valve D's inlet end.
3. A leak resistant gas turbine valve control apparatus as set forth in claim 1 wherein: the gas pressure valve group comprises a gas pressure valve A and a gas pressure valve B which are arranged in parallel.
4. A leak resistant gas turbine valve control apparatus as set forth in claim 1 wherein: the gas flow valve group comprises a gas flow valve A, a gas flow valve B and a gas pilot flow valve which are arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220151571.5U CN216715877U (en) | 2022-01-20 | 2022-01-20 | Prevent gas turbine valve control device of leakage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220151571.5U CN216715877U (en) | 2022-01-20 | 2022-01-20 | Prevent gas turbine valve control device of leakage |
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| CN216715877U true CN216715877U (en) | 2022-06-10 |
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| CN202220151571.5U Active CN216715877U (en) | 2022-01-20 | 2022-01-20 | Prevent gas turbine valve control device of leakage |
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