CN117073993A - Valve total closure test method - Google Patents
Valve total closure test method Download PDFInfo
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- CN117073993A CN117073993A CN202310825539.XA CN202310825539A CN117073993A CN 117073993 A CN117073993 A CN 117073993A CN 202310825539 A CN202310825539 A CN 202310825539A CN 117073993 A CN117073993 A CN 117073993A
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- closing
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- 238000010998 test method Methods 0.000 title claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Turbines (AREA)
Abstract
The invention relates to the technical field of valve full-closure test, and discloses a valve full-closure test method, wherein during the test, a designated valve is conveyed to an MOOG valve, the valve is controlled to be gradually closed, a corresponding shutoff solenoid valve is electrified until the valve is closed to 10% of full stroke, the main valve is rapidly closed to a full-closure position, the shutoff solenoid valve is powered off, an MOOG valve command is recovered to 100%, and the main valve is gradually opened to a full-opening position; for the high-pressure main valve and the two medium-pressure main valves without the LVDT, a travel switch at 10% position is additionally arranged on site for representing the valve total-closing test in place and laying a cable from the switch to a DCS cabinet, so that the function of the valve total-closing test during the operation of the steam turbine is realized, the closing reliability of the main valve and the regulating valve when the unit endangers and breaks is ensured, the safety of the generator set of a power plant is improved, and the problem that the existing main valve and the existing regulating valve of the steam turbine are not closed in time to cause danger is solved.
Description
Technical Field
The invention relates to the technical field of valve full-closure tests, in particular to a valve full-closure test method.
Background
The steam turbine is also called a steam turbine engine, and is a rotary steam power device, high-temperature and high-pressure steam passes through a fixed nozzle to become accelerated airflow and then is sprayed onto blades, so that a rotor provided with a blade row rotates and simultaneously does work outwards. Steam turbines are the main equipment of modern thermal power plants and are also used in metallurgical industry, chemical industry and ship power plants.
The correct action of the main valve and the speed regulating valve of the steam turbine is the root of the safe operation of the unit, and in the recent process of overspeed of the steam turbine, the speed regulating valve and the main valve of a power plant are not closed in time, so that the steam turbine is seriously overspeed, the production safety is threatened, and therefore, the valve total closing test of the main valve and the speed regulating valve of the steam turbine is necessary.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a valve total-closing test method which has the advantage of improving the safety of a generator set of a power plant and solves the problem that the main valve and the speed regulating valve of the existing steam turbine are not closed in time to cause danger.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: a valve total closure test method comprises the following steps:
s1: the movable test is started, the designated is conveyed to the MOOG valve through the control equipment, and the control valve is gradually closed;
s2: when the valve is closed to 10% of the full stroke, the corresponding shutoff electromagnetic valve (10 YV) is electrified;
s3: rapidly closing the main valve to a full-closing position, wherein the shutoff electromagnetic valve is de-energized, the MOOG valve command is restored to 100%, and the main valve is gradually opened to the full-opening position;
s4: the valve full-closing feedback is returned, the test is overtime, the manual operation cutting test is carried out, any condition (except all main valves are fully opened) which is required to be met is not met, and the full-closing test is automatically ended as long as one condition is met.
Preferably: the MOOG valve control valve in S1 closes at a 1% rate.
Preferably: and the MOOG valve in the step S1 is replaced by an electromagnetic valve.
Preferably: the corresponding blocking solenoid valve (11 YV) in the S2 is electrified.
Preferably: and the MOOG valve in the step S1 is replaced by an electromagnetic valve.
Preferably: and the valve position feedback in the step S3 is less than 2%.
(III) beneficial effects
Compared with the prior art, the invention provides a valve total closure test method, which has the following beneficial effects:
the invention has the advantages of improving the safety of the generator set of the power plant, for the high-pressure main valve and the two medium-pressure main valves without the LVDT, a travel switch at 10% position is respectively added on site for representing the valve total-closing test in place, and a cable from the switch to a DCS cabinet is laid, so that the function of valve total-closing test during the operation of the steam turbine is realized, the closing reliability of the main valve and the valve when the generator set endangers and breaks is ensured, the safety of the generator set of the power plant is improved, and the problem of danger occurrence caused by the fact that the main valve and the speed regulating valve of the existing steam turbine are not closed in time is solved.
Drawings
FIG. 1 is a schematic diagram of a high-speed gate full-closing activity test flow in the invention;
FIG. 2 is a schematic diagram of a flow chart of an electromagnet activity test in the invention;
FIG. 3 is a schematic diagram of the flow of the high-pressure steam valve total closing activity test in the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1-3, in testing a main valve with LVDT indication and a MOOG valve, the method comprises the steps of:
s1: the activity test is started, the designated is sent to the MOOG valve through the control equipment, and the valve MOOG is controlled to be closed at a rate of 1%;
s2: when the valve is closed to 10% of the full stroke, the corresponding shutoff electromagnetic valve (10 YV) is electrified;
s3: rapidly closing the main valve to a full-closing position, wherein the shutoff electromagnetic valve is de-energized, the MOOG valve command is restored to 100%, and the main valve is gradually opened to the full-opening position;
s4: the valve full-closing feedback is returned, the test is overtime, the manual operation cutting test is carried out, any condition (except all main valves are fully opened) which is required to be met is not met, and the full-closing test is automatically ended as long as one condition is met.
Example two
Referring to fig. 1-3, when testing a main valve without LVDT indications and a MOOG valve, the method comprises the steps of:
s1: the activity test is started, the specified is transmitted to the electromagnetic valve through the control equipment, and the control valve is closed at a rate of 1%;
s2: when the valve is closed to 10% of the full stroke, the corresponding shutoff electromagnetic valve (11 YV) is electrified;
s3: the main valve is quickly closed to a full-closing position, so that the test is finished, the test electromagnetic valve is powered off, the blocking electromagnetic valve is powered off, and the main valve is gradually opened to a full-opening position;
s4: the valve full-closing feedback is returned, the test is overtime, the manual operation cutting test is carried out, any condition (except all main valves are fully opened) which is required to be met is not met, and the full-closing test is automatically ended as long as one condition is met.
Example III
Referring to fig. 1-3, in a full-closing activity test of a high-pressure speed regulating valve, the method comprises the following steps:
s1: the activity test is started, the designated is sent to the MOOG valve through the control equipment, and the valve MOOG is controlled to be closed at a rate of 1%;
s2: when the valve is closed to 10% of the full stroke, the corresponding shutoff electromagnetic valve (10 YV) is electrified;
s3: rapidly closing the main valve to a fully closed position, wherein valve position feedback is less than 2%, and stopping the test until the power of the shutoff electromagnetic valve is lost and a MOOG valve command is restored to 100%, so that the main valve is gradually opened to a fully opened position;
s4: the valve full-closing feedback is returned, the test is overtime, the manual operation cutting test is carried out, any condition (except all main valves are fully opened) which is required to be met is not met, and the full-closing test is automatically ended as long as one condition is met.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A valve total closure test method is characterized in that: the method comprises the following steps:
s1: the movable test is started, the designated is conveyed to the MOOG valve through the control equipment, and the control valve is gradually closed;
s2: when the valve is closed to 10% of the full stroke, the corresponding shutoff electromagnetic valve (10 YV) is electrified;
s3: rapidly closing the main valve to a full-closing position, wherein the shutoff electromagnetic valve is de-energized, the MOOG valve command is restored to 100%, and the main valve is gradually opened to the full-opening position;
s4: the valve full-closing feedback is returned, the test is overtime, the manual operation cutting test is carried out, any condition (except all main valves are fully opened) which is required to be met is not met, and the full-closing test is automatically ended as long as one condition is met.
2. The valve total closure test method of claim 1, wherein: the MOOG valve control valve in S1 closes at a 1% rate.
3. The valve total closure test method of claim 1, wherein: and the MOOG valve in the step S1 is replaced by an electromagnetic valve.
4. A method of valve total closure testing according to claim 3, wherein: the corresponding blocking solenoid valve (11 YV) in the S2 is electrified.
5. The valve total closure test method of claim 1, wherein: and the MOOG valve in the step S1 is replaced by an electromagnetic valve.
6. The valve total closure test method of claim 5, wherein: and the valve position feedback in the step S3 is less than 2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310825539.XA CN117073993A (en) | 2023-07-06 | 2023-07-06 | Valve total closure test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310825539.XA CN117073993A (en) | 2023-07-06 | 2023-07-06 | Valve total closure test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117073993A true CN117073993A (en) | 2023-11-17 |
Family
ID=88706866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310825539.XA Pending CN117073993A (en) | 2023-07-06 | 2023-07-06 | Valve total closure test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117073993A (en) |
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2023
- 2023-07-06 CN CN202310825539.XA patent/CN117073993A/en active Pending
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