CN212432253U - Flow measuring device inflation maintenance system for steam turbine performance test - Google Patents

Abstract

The utility model discloses an inflatable maintenance system for a flow measuring device for a performance test of a steam turbine. The utility model comprises a steel cylinder for providing protective gas, a pressure gauge, an inflatable conduit and two baffle plates for connecting with both ends of a flow measuring device. The outer end of the inflation duct is provided with a sealing cover; when inflating, the inflation duct removes the sealing cover and connects with the steel cylinder, and inflates the pipes and nozzles of the flow measuring device through the steel cylinder. The utility model has the advantages of simple structure, convenient disassembly and assembly, and effectively protects the flow measuring device by inflating the pipeline and the nozzle.

Description

Flow measuring device inflation maintenance system for steam turbine performance test

Technical Field

The utility model belongs to the equipment maintenance field, specifically speaking are a steam turbine is flow measuring device for performance test aerifys maintenance system.

Background

In the process of a thermal performance test of a steam turbine, a commonly used flow nozzle is an ASME flow nozzle which is a high-precision flow measuring device and is a long-diameter nozzle device with a low-pressure beta value at the throat part, the ASME nozzle adopts a throttling flow sensor, and a special pressure taking (throat pressure taking) mode is adopted on the basis of the long-diameter nozzle, so that the flow sensor not only has the advantages of the traditional long-diameter nozzle, but also has the unique advantages of stable outflow coefficient, high repeatability and the like.

Because the test media are all high-temperature and high-pressure water or steam, the material requirement level for manufacturing the flow nozzle is high. The materials used are as follows: flange or clip: carbon steel and alloy steel can be selected according to the medium temperature; stainless steel, etc.; a nozzle: stainless steel 304, 316, etc.

In the industrial production process, accurate and reliable unit performance indexes are basic bases for power generation enterprises to make unit energy saving and consumption reduction measures and improve equipment availability, and are also bases for developing energy-saving power generation scheduling work, and whether main flow measurement results are the most critical factors for accurately obtaining the indexes. If the flow nozzle is improperly maintained, the inner wall metal corrosion occurs, the test precision is influenced if the inner wall metal corrosion is low, and the flow nozzle is scrapped if the inner wall metal corrosion is high.

The flow nozzle for the test is a test instrument, only needs to be installed on an instrument tube during the test, needs to be detached from the system after the test is finished, and the next use time depends on the test plan condition, and may be half a year or one year. This faces nozzle maintenance problems. Because the honeycomb duct, especially the nozzle inner wall is made by special material, the maintenance requirement is high, need to carry out the protection of aerifing to flow nozzle and pipeline.

Although different manufacturers and different materials are used for the flow nozzles selected in the thermal performance test of the steam turbine, the requirements of the nozzles for inflation maintenance are the same.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome the defect that above-mentioned prior art exists, provide a steam turbine is flow measuring device for performance test and aerifys maintenance system to effectively protect flow measuring device.

Therefore, the utility model adopts the following technical scheme: the system comprises a steel cylinder for providing protective gas, a pressure gauge, an inflation guide pipe and two baffle plates connected with two ends of the flow measuring device, wherein the inflation guide pipe penetrates through one baffle plate and is communicated with a pipeline of the flow measuring device, and a sealing cover is arranged at the outer end of the inflation guide pipe; when the air is filled, the air filling guide pipe is used for detaching the sealing cover and is connected with the steel cylinder, and the pipeline and the nozzle of the flow measuring device are filled with air through the steel cylinder.

Install the manometer additional for pressure monitoring and gas pressure monitoring at ordinary times when filling protective gas, in time make-up gas when treating pressure drop.

Furthermore, the baffle adopts the bolt and nut to be connected with the flange at the end of the pipeline, so that the baffle is convenient to disassemble and assemble.

Further, the inflatable guide pipe is an organic glass pipe, the bolt and the nut are made of organic glass, and the baffle is made of organic glass. Because baffle, bolt and nut can often the dismouting, adopt organic glass material after, can avoid causing the damage to the screw thread of flange.

Furthermore, a through hole with threads is formed on the baffle plate for containing the inflation conduit; the two ends of the inflation conduit are provided with external threads, one end of the inflation conduit is connected with the through hole, and the other end of the inflation conduit is connected with the sealing cover.

Furthermore, the sealing cover adopts a nut, is convenient to disassemble and assemble, and is installed and screwed after the protective gas is filled.

Furthermore, the steel cylinder is connected with the inflation conduit by a gas pipe.

The utility model discloses the beneficial effect who has as follows: the utility model has the advantages of simple structure, easy dismounting through aerifing pipeline and nozzle, has effectively protected flow measuring device. The utility model discloses the during operation is reliable and stable.

Drawings

FIG. 1 is a schematic structural view of the present invention (without a steel cylinder);

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic structural view of the present invention in use.

Detailed Description

The invention is further described with reference to the drawings and the detailed description.

The system for charging and maintaining the flow measuring device for the steam turbine performance test shown in fig. 1 is composed of a steel cylinder 1 for providing protective gas, a pressure gauge 9, a charging conduit 3 and two baffles 4 connected with two ends of the flow measuring device. The inflation conduit 3 penetrates through one baffle and is communicated with the pipeline 8 of the flow measuring device, and the outer end of the inflation conduit 3 is provided with a sealing cover 11.

In the case of inflation, as shown in fig. 3, the inflation tube 3 is connected to the cylinder 1 with the seal cap 11 removed, and the tube 8 and the nozzle 10 of the flow rate measuring device are inflated through the cylinder 1.

As shown in fig. 2, the baffle 4 is connected with a flange 7 at the end of the pipeline by bolts 5 and nuts 6. The inflation conduit 3 is an organic glass tube, the bolt 5 and the nut 6 are made of organic glass, and the baffle 4 is made of organic glass. A through hole with threads is formed on the baffle plate for containing the inflation conduit; the two ends of the inflation conduit are provided with external threads, one end of the inflation conduit is connected with the through hole, and the other end of the inflation conduit is connected with the sealing cover. The sealing cover adopts a screw cap. The steel cylinder 1 is connected with an inflation conduit 3 by adopting a gas delivery pipe 2.

Through the on-site inspection, the utility model discloses the during operation is reliable and stable, can play the effect of protection to flow nozzle and pipeline.

Claims (6)

1. The inflatable maintenance system of the flow measuring device for the performance test of the steam turbine includes a steel cylinder (1) that provides a protective gas, and is characterized in that it also includes a pressure gauge (9), an inflatable conduit (3) and a device for connecting with both ends of the flow measuring device. Two baffles (4), one baffle (4) of which the inflatable conduit (3) runs through and communicates with the pipeline (8) of the flow measuring device, and the outer end of the inflatable conduit (3) is provided with a sealing cover ( 11); When inflating, the inflation conduit (3) removes the sealing cover (11) and connects with the steel cylinder (1), and inflates the pipe (8) and the nozzle (10) of the flow measuring device through the steel cylinder (1). 2. The inflatable maintenance system of the flow measuring device for steam turbine performance test according to claim 1, characterized in that, the baffle plate (4) adopts bolts (5) and nuts (6) and the flange (6) of the pipe end. 7) Connect. 3. The inflatable maintenance system of the flow measuring device for steam turbine performance test according to claim 2, wherein the inflatable conduit (3) is a plexiglass tube, and the materials of the bolt (5) and the nut (6) are organic Glass, the material of the baffle (4) is plexiglass. 4. The inflatable maintenance system of the flow measuring device for steam turbine performance test according to claim 1 and 2, characterized in that, a threaded through hole is provided on the baffle plate for installing the inflatable conduit; Both ends are provided with external threads, one end is connected with the through hole, and the other end is connected with the sealing cover (11). 5 . The gas-filled maintenance system for the flow measuring device for steam turbine performance test according to claim 4 , wherein the sealing cover ( 11 ) adopts a screw cap. 6 . 6. The inflatable maintenance system for a flow measuring device for a performance test of a steam turbine according to claim 1 or 2, characterized in that the steel cylinder (1) is connected to the inflation conduit (3) by a gas delivery pipe (2).

Images