CN211742661U - Test device for verifying main steam pipeline leakage monitoring method - Google Patents

Abstract

The utility model discloses a test device for verifying main steam pipeline leakage monitoring method, including compressed air bottle, steam generator, gas preheater, gas premix case, proof box, compressed air sweep pipe, infiltration subassembly, pipeline and annex, valve etc. still constitute jointly by data acquisition and processing system, control system, steam flow, pressure and temperature measurement system. The utility model discloses can simulate the main steam pipeline leakage of different pressure, flow and position to verify the validity of leakage monitoring method.

Description

Test device for verifying main steam pipeline leakage monitoring method

Technical Field

The utility model relates to a nuclear power plant monitoring technology field especially relates to a test device for verifying main steam pipeline leakage monitoring method.

Background

A leak-before-break (LBB) design criterion adopted by mechanical analysis of the main steam pipeline is based on that the main steam pipeline has a leakage monitoring capability meeting requirements. However, the existing leakage monitoring system may not be able to monitor the leakage condition of the main steam pipeline with small flow rate under different operating conditions, i.e. different temperatures and pressures, and also may not be able to verify the effectiveness of the leakage monitoring method.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is to solve the shortcoming that exists among the prior art, if: the existing leakage monitoring system may not be capable of monitoring the leakage condition of the main steam pipeline with small flow under different operating conditions, namely different temperatures and pressures, and also cannot verify the effectiveness of the leakage monitoring method, so that the test device for verifying the leakage monitoring method of the main steam pipeline is provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a test device for verifying a main steam pipeline leakage monitoring method comprises a compressed air bottle, a steam generator, a gas preheater, a gas premixing box, a test box, a compressed air purging pipe, a permeation assembly, a pipeline, accessories, a valve and the like, and further comprises a data acquisition and processing system, a control system and a steam flow, pressure and temperature measuring system.

Preferably, the gas premixing box and the test box jointly form a rack main body, and a heat tracing device is arranged outside the rack main body and is a crawler-type heating sheet.

Preferably, a plurality of layers of baffles are arranged in the gas premixing box to form a flow passage.

Preferably, the number of the test boxes is two, the test boxes are respectively a No. 1 test box and a No. 2 test box, and three compressed air blowing pipes with different pipe diameters are respectively arranged in the No. 1 test box and the No. 2 test box. And three 1/4 'OD x 0.065' compressed air purging pipes are arranged in the No. 1 test box, and three 3/8 'OD x 0.065' compressed air purging pipes are arranged in the No. 2 test box.

Preferably, the infiltration component is a metal sintering component, the metal sintering component is installed in the three-way joint by adopting a solid metal sintering cylinder, and the other two ends of the metal sintering component are connected with a compressed air purging pipe.

The utility model has the advantages that: the test device can simulate the leakage of the main steam pipeline with different pressures, flows and positions, and verify the effectiveness of the leakage monitoring method.

Drawings

Fig. 1 is an overall flowchart of a testing apparatus for verifying a main steam pipeline leakage monitoring method according to the present invention;

FIG. 2 is a schematic view of the heating and internal temperature detection points of the middle stage body of the present invention;

FIG. 3 is a schematic structural view of the middle stage body of the present invention;

FIG. 4 is a schematic view of the internal structure of the test box of the present invention;

fig. 5 is an assembly of the middle osmosis module of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-5, a test device for verifying a main steam pipeline leakage monitoring method comprises a compressed air bottle, a steam generator, a gas preheater, a gas premixing box, a test box, a compressed air purging pipe, a permeation component, a pipeline, accessories, a valve and the like, and further comprises a data acquisition and processing system, a control system and a steam flow, pressure and temperature measuring system.

The gas mixes the case with the proof box and constitutes rack main part jointly, and rack main part outside is provided with the heat tracing device, and the heat tracing device is crawler-type heating plate for prevent the steam condensation.

A plurality of layers of baffles are arranged in the gas premixing box to form a flow passage so as to ensure that the compressed air and the steam are fully mixed.

The quantity of proof box is two and is No. 1 proof box and No. 2 proof box respectively, arranges the compressed air of three different pipe diameters in No. 1 proof box and No. 2 proof box respectively and sweeps the pipe. And three 1/4 'OD x 0.065' compressed air purging pipes are arranged in the test box No. 1, and three 3/8 'OD x 0.065' compressed air purging pipes are arranged in the test box No. 2. The compressed air purging pipe enters and exits from the upper cover plate of the test box, so that the permeation assemblies in different pores can be replaced conveniently.

The infiltration subassembly adopts the metal sintering subassembly, and the metal sintering subassembly adopts solid metal sintering cylinder to install to the three way connection in, and its other both ends connect the compressed air and sweep the pipe.

This test device is before experimental according to the operating mode requirement change infiltration subassembly to suitable specification, and experimental flow is as follows:

1. preheating a system, closing all valves, electrifying a heat tracing device arranged outside the rack main body, and starting to heat the rack main body until the temperature inside the rack main body meets the working condition requirement;

2. starting a VGV and an AGV, adjusting the VCV and the ACV to enable the flow ratio of compressed air and steam to meet the requirement of a working condition, and starting a gas preheater after the flow is stable; the test can be started after the temperature of the outlet of the gas premixing box is stable;

3. opening the SGVa and the SGvb, starting to supply air to the compressed air purging pipe, and adjusting the SRV to a proper pressure;

4. starting a test, opening a stop valve on one path of compressed air purging pipe, keeping other compressed air purging pipes closed, starting measurement, setting SEVa and SEvb in a control system to operate according to certain opening and closing time, then circularly supplying air to the compressed air purging pipes, and recording and acquiring stable data;

5. and (5) repeating the step (4), and sequentially carrying out tests and data acquisition on the rest 5 paths of compressed air purging pipes according to the same flow. The collected main data comprises VVF flow data, AVF flow data, SVF flow data, steam concentration data in a measuring pipeline obtained by a system for measuring steam flow, pressure and temperature in the rack main body, opening and closing signals of an electromagnetic valve in the measuring pipeline and the like.

In conclusion, the test device can simulate the leakage of the main steam pipeline with different pressures, flows and positions, and verify the effectiveness of the leakage monitoring method.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Claims (5)

1. A test device for verifying a main steam pipeline leakage monitoring method comprises a compressed air bottle, a steam generator, a gas preheater, a gas premixing box, a test box, a compressed air purging pipe, a permeation component, a pipeline, accessories and a valve, and is characterized by further comprising a data acquisition and processing system, a control system and a steam flow, pressure and temperature measuring system; the output of compressed air bottle is connected with the input and the experimental box of gas preheater respectively through infiltration subassembly and valve, steam generator's output is connected with gas preheater's input through infiltration subassembly and valve, gas preheater's output is connected with the experimental box through gas premixing case, the control end of infiltration subassembly and valve is connected with control system, control system passes through data acquisition and processing system and steam flow, pressure and temperature measurement system are connected, steam flow, pressure and temperature measurement system's output is connected with the experimental box.

2. The test device for verifying the main steam pipeline leakage monitoring method according to claim 1, wherein the gas premixing box and the test box together form a bench body, and a heat tracing device is arranged outside the bench body and is a crawler-type heating plate.

3. The test device for verifying the main steam pipeline leakage monitoring method according to claim 1, wherein a plurality of layers of baffles are installed in the gas premixing box to form a flow passage.

4. The test device for verifying the main steam pipeline leakage monitoring method according to claim 1, wherein the number of the test boxes is two, and the test boxes are respectively No. 1 test box and No. 2 test box, and three compressed air purging pipes with different pipe diameters are respectively arranged in the No. 1 test box and the No. 2 test box; and three 1/4 'OD x 0.065' compressed air purging pipes are arranged in the No. 1 test box, and three 3/8 'OD x 0.065' compressed air purging pipes are arranged in the No. 2 test box.

5. The test device for verifying the main steam pipeline leakage monitoring method according to claim 1, wherein the infiltration assembly is a metal sintering assembly, the metal sintering assembly is installed into the tee joint by adopting a solid metal sintering cylinder, and the other two ends of the metal sintering assembly are connected with compressed air purging pipes.

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