CN217179894U

CN217179894U - AST electromagnetic valve inspection device

Info

Publication number: CN217179894U
Application number: CN202221022652.1U
Authority: CN
Inventors: 李光
Original assignee: Dezhou Power Plant of Huaneng International Power Co Ltd
Current assignee: Dezhou Power Plant of Huaneng International Power Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-08-12
Anticipated expiration: 2032-04-29

Abstract

An AST electromagnetic valve inspection device. At present, when the AST electromagnetic valve is detected, the AST electromagnetic valve is only suitable for scheduled periodic maintenance, and is only suitable for emergency treatment of outburst situations through self-inspection, repair and maintenance, but the inspection and maintenance quality cannot be guaranteed due to lack of detection experimental means. An AST solenoid valve verifying attachment, its constitution includes: the AST electromagnetic valve monitoring device comprises an AST electromagnetic valve (1) and a detection module (2), wherein four fixedly connected mounting holes (3) corresponding to the AST electromagnetic valve are formed in the detection module, bolt assemblies are inserted into the mounting holes to fixedly connect the AST electromagnetic valve and the monitoring module, and a pressure oil inlet channel (4), a safety oil inlet channel (5) and two oil return channels (6) are respectively formed in the detection module; the pressure oil inlet channel is connected with a manual stop valve A (7) and a pressure gauge A (8) through pipelines, and the pressure gauge A is installed between the manual stop valve A and the pipelines of the detection module. The utility model discloses be applied to the power plant field.

Description

AST electromagnetic valve inspection device

Technical Field

The utility model relates to an AST solenoid valve verifying attachment.

Background

The AST electromagnetic valve is a most key equipment component in the power plant crisis interdiction protection, and is an important component for ensuring the safe shutdown of a unit by judging whether the air inlet of a steam turbine can be interrupted in time when the unit is in a crisis. At present, two maintenance approaches are commonly adopted by each power plant, namely, a professional manufacturer is assigned by outsourcing to perform inspection, cleaning and detection, and the professional manufacturer performs inspection, cleaning and detection by self. The advantages of outsourcing commission repair are that the test can be carried out through a professional hydraulic detection platform after repair, the operation condition of equipment is simulated, the quality of the electromagnetic valve after repair is ensured, the defects are that the cost is high, the approval period of the application is long, the maintenance is only suitable for planned periodic maintenance, the inspection, repair and maintenance are carried out by self, the maintenance is only suitable for emergency treatment of outburst conditions, but the detection and test means is lacked, so that the maintenance quality cannot be ensured, and the uncertainty is increased for the safe operation of the unit.

Disclosure of Invention

The utility model aims at providing a AST solenoid valve verifying attachment, through the off-line experiment module of processing installation, carry out gaseous pressurize test, whether seek the analysis piston and wear and tear, whether the clearance exceeds standard, whether spring force is not enough, whether the piston is because of the jam that impurity arouses rejects all aspects reason such as move, makes corresponding maintenance treatment strategy respectively.

The above purpose is realized by the following technical scheme:

an AST solenoid valve verifying attachment, its constitution includes: the AST electromagnetic valve monitoring device comprises an AST electromagnetic valve and a detection module, wherein four fixedly connected mounting holes corresponding to the AST electromagnetic valve are formed in the detection module, a bolt assembly is inserted into each mounting hole to fixedly connect the AST electromagnetic valve with the monitoring module, and a pressure oil inlet channel, a safety oil inlet channel and two oil return channels are respectively formed in the detection module;

the pressure oil inlet channel is connected with a manual stop valve A and a pressure gauge A through a pipeline, the pressure gauge A is installed between the manual stop valve A and the pipeline of the detection module, and the manual stop valve A is connected with a hose;

the safety oil inlet channel is connected with a manual stop valve B and a pressure gauge B through pipelines, the pressure gauge B is arranged between the manual stop valve B and the pipeline of the detection module, and the manual stop valve B is connected with a hose;

and hoses on the manual stop valve A and the manual stop valve B are respectively connected with the nitrogen cylinder.

The AST solenoid valve verifying attachment, detection module on pressure oil inlet channel, safe oil inlet channel and two oil return passageways respectively with AST solenoid valve pressure oil inlet channel, safe oil inlet channel and two oil return passageways correspond to each other.

The AST electromagnetic valve verifying attachment, characterized by: the length and the width of the detection module and the AST electromagnetic valve are the same.

The utility model has the advantages that:

1. the utility model discloses an experiment platform of preparation simulation replaces the oil pressure experiment platform of specialty, replaces the oil pressure with the air pressure, reaches the test purpose, saves the oil pump of specialty platform configuration, the connecting tube of hydro-cylinder and corresponding configuration, equipment such as manometer meter. According to different sizes of the AST, a corresponding experiment module is manufactured, oil port openings corresponding to the AST electromagnetic valves are processed on the module, a pressurizing stop valve and a display meter are installed, the pressure stop valve and the display meter are connected with a nitrogen cylinder through a hose, and the tightness of the pressure stop valve and the display meter is observed, so that the purpose of offline experiment detection is achieved.

2. The utility model is suitable for an east vapour, the regulation security system who breathes out, go up vapour plant turboset and adopt ETS control is the effective detection means who realizes the off-line and judge whether the AST solenoid valve action is stable.

3. The utility model provides a AST solenoid valve can only the online problem of going on the detection, realized the off-line possibility of detecting, detect in a flexible way, operated, save time, the vitality is saved the expense and is detected the accuracy, practices thrift and is assisted the maintenance cost outward and buy about thirty ten thousand yuan of experiment platform expense, and long-term use economic nature is higher. Because the nitrogen is used as a testing medium, the power plant generally has reserves, air source pressure and quality, and good quality assurance is achieved, and secondary pollution to the electromagnetic valve manufacturing and system can be avoided.

4. This practicality has following advantage:

(1) the high-pressure accumulator and the low-pressure accumulator in the turbine regulating security system are both made of nitrogen media, so that the pressure is high, impurities are few, the safety and the reliability are high, and the high-pressure accumulator and the low-pressure accumulator are widely used in an EH oil system, so that the nitrogen experimental media are recommended to be preferred.

(2) The air inflation experiment aims at two, firstly, tightness and flexibility of the air inflation experiment are detected, the air inflation experiment needs to be carried out respectively, during the tightness experiment, the electromagnetic valve needs to be in an electrified closing state, tightness of the air inflation experiment is judged by observing reading of a pressure gauge and air leakage conditions of oil return ports, after the experiment test is completed, the flexibility experiment is carried out, during the experiment, the electromagnetic valve needs to be in an electrified opening state, at the moment, the two oil return ports are in a discharge state, pressure oil return and smoothness of a safety oil return channel are checked, if air is exhausted normally, the action is flexible, the air exhaust working state is good and normal, and otherwise, the air inflation experiment needs to be checked and repaired.

(3) When the electromagnetic valve is in a power-off opening state test, in order to prevent the harm of pressure gas emission to a human body, the work for protecting eyes is required to be carried out well in the test, and the electromagnetic valve is not required to stand opposite to the exhaust port to work.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of a detection module.

In the figure: 1. AST solenoid valve, 2, detection module, 3, mounting hole, 4, pressure oil inlet channel, 5, safe oil inlet channel, 6, oil return channel, 7, manual stop valve A, 8, manometer A, 9, hose, 10, manual stop valve B, 11, manometer B, 12, first spring, 13, second spring, 14 first piston, 15, second piston, 16, bolt assembly.

The specific implementation mode is as follows:

example 1:

an AST solenoid valve verifying attachment, its constitution includes: the system comprises an AST electromagnetic valve 1 and a detection module 2, wherein the detection module is provided with four fixedly connected mounting holes 3 corresponding to the AST electromagnetic valve, a bolt assembly 16 is inserted into the mounting holes to fixedly connect the AST electromagnetic valve with the monitoring module, and the detection module is respectively provided with a pressure oil inlet channel 4, a safety oil inlet channel 5 and two oil return channels 6; the pressure oil inlet channel is connected with a manual stop valve A7 and a pressure gauge A8 through pipelines, the pressure gauge A is installed between the manual stop valve A and the pipeline of the detection module, and the manual stop valve A is connected with the hose 9; the safety oil inlet channel is connected with a manual stop valve B10 and a pressure gauge B11 through pipelines, the pressure gauge B is installed between the manual stop valve B and the pipeline of the detection module, and the manual stop valve B is connected with a hose; and hoses on the manual stop valve A and the manual stop valve B are respectively connected with the nitrogen cylinder.

Example 2:

according to the AST solenoid valve verifying attachment of embodiment 1, pressure oil inlet channel, safe oil inlet channel and two oil return channels on the detection module respectively with AST solenoid valve pressure oil inlet channel, safe oil inlet channel and two oil return channels corresponding each other.

Example 3:

according to the experimental module of solenoid valve size preparation equidimension, processing and its control oil duct that corresponds, pressure oil inlet and safe oily inlet channel install stop valve and manometer respectively additional in the module, be used for control to aerify and survey atmospheric pressure, two unordered installations of way oil return passageway, the stop valve can adopt welding or processing screw thread connected mode all with the module installation, the manometer install on the pipeline between stop valve and module can, process four screw of being connected fixedly corresponding with the solenoid valve in the module at last, it is together fixed with the module with the solenoid valve through connecting bolt butt joint mode. After the electromagnetic valve and the experiment module are connected and fixed, one gas cylinder with sufficient nitrogen pressure is prepared, two sets of connecting hoses are connected with the gas cylinder, steam is flushed into the pressure oil chamber and the safety oil chamber through the module channels respectively, when the pressure reaches 7mpa, the gas is stopped to be inflated, the stop valve is closed, pressure maintaining is carried out, the reading of the pressure gauge is observed, the tightness of the pressure gauge is judged, and the position of a part with abnormality is judged immediately on the side with reduced pressure. The flexibility and tightness of the action of the two pistons are related to the safety and reliability of the crisis security system.

Example 4:

in fig. 1, the AST electromagnetic valve is schematically illustrated, which is two chambers, namely a high pressure oil chamber and an AST oil (safety oil) chamber, when normal, the two chambers have equal pressure, the second piston 15 is in a static closed state, when the electromagnetic valve is de-energized (blocked), the first piston 14 moves upwards, the high pressure oil is communicated with the oil return port, the pressure of the chambers is reduced, the second piston moves to the left side under the action of the pulling force of the second spring 13 and the AST oil pressure, the AST chamber is opened, the safety oil is fed and communicated with the oil return port, and therefore the oil pressure under all valve pistons is discharged, and the purpose of blocking the inlet air is achieved.

According to the action principle of the electromagnetic valve, tightness and action flexibility of a first piston and a second piston (a two-stage valve) of a sliding valve are ensured, a gas pressure maintaining test is carried out through a processing and mounting offline experiment module, and corresponding overhaul treatment strategies are respectively made for analyzing various reasons such as whether the pistons are worn, whether gaps exceed standards, whether spring elasticity is insufficient, whether the pistons are jammed and do not move due to impurities and the like.

Claims

1. An AST solenoid valve verifying attachment, its constitution includes: AST solenoid valve and detection module, characterized by: the AST electromagnetic valve is fixedly connected with the monitoring module by a bolt assembly inserted into the mounting hole, and the detection module is respectively provided with a pressure oil inlet channel, a safety oil inlet channel and two oil return channels;

2. The AST solenoid valve inspection device of claim 1, wherein: the pressure oil inlet channel, the safety oil inlet channel and the two oil return channels on the detection module respectively correspond to the pressure oil inlet channel, the safety oil inlet channel and the two oil return channels of the AST electromagnetic valve; the length and the width of the detection module and the AST electromagnetic valve are the same.