Method and device for measuring gas leakage in the valve, using the spark plug tubes

 

The invention relates to the field of pipeline transportation of natural gas. The volume of gas flowing through the valves on candle tube, is determined by the oscillation frequency of the valve plates, tightly, with preload, periodically choking gas outlet of the spark plug tube into the atmosphere. A device for implementing the method comprises a vertically located spark plug tube, the entrance to which is hermetically connected with the outlet shutoff valves and outlet provided with a protective cap, with holes for gas outlet to the atmosphere. At the output of the spark plug tubes installed exhaust valve system equipped with a sensor for measuring the frequency deviation of the valve over time. Valve exhaust valve system is rigidly associated rod movably mounted in the guide sleeve, and his movements are registered by the sensor. The technical result of the invention is the provision of measuring the volume of natural gas leaks through a leak valve. 2 S. and 1 C.p. f-crystals, 1 Il.

The invention relates to the field of power engineering and can be used in systems transporting gas at compressor stations, gas distribution hundred the ez spark plug tube into the atmosphere.

There is a method of measuring gas leaks in the valve, using the spark plug tubes, including the determination of the volume of gas flowing through the valves using the appropriate device. In different parts of the system provides the spark plug tubes, used for ventilation of enclosures of gas pipelines in the underground passages, emergency dumping gas on the linear part of the pipeline and flushing of equipment and pipelines compressor stations (SU 585362 A, class F 16 To 37/00, 25.12.77).

The technical result of the invention is to provide a method of providing a volume measurement of natural gas leaks through a leak valve.

This is due to the fact that the exit gas from the spark plug tube in a pressurized atmosphere with preload and periodically intermittently drossellied. Measuring the frequency of oscillation of the valve membrane provide a sensor for measuring the frequency deviation of the valve in time, which is rigidly associated rod movably mounted in the guide sleeve, and moving the rod relative to the body captured by the sensor.

A method of measuring the volume of gas flowing through the valves on candle tube, is implemented as follows. Gas, the pour valve system. The accumulation of gas in the spark plug tube there is an excessive pressure exceeds the pressure of the preload valve system generated by the elastic element 7. In the valve plate is lifted and the gas exits through the holes 3 in the atmosphere. After that, the excess gas pressure drops, the valve 4 is returned to the place, again sealing the exit candle tubes, since the volume and pressure of the gas that fills the interior space of the spark plug tubes, known and equal to the geometric volume of this space and the pressure of the preload generated by the elastic element 7, respectively. Knowing the frequency of oscillation of the valve 4, as measured through the use of sensor 9, is calculated volumetric flow rate of expired gas by the formulawhere Qg- volume flow, m3/Fmo- the power of preload, N; mCL- the total mass of the moving elements of the valve system, kg; g - gravitational acceleration, m/s2;- molar mass of the gas, kg/mol; R is the universal gas constant, j/kgTo;g- gas density, kg/m3; TATM- ambient temperature (atmosphere),o;
SCLical oscillations of the valve, with-1;
VSt- the volume of the spark plug tubes, m3.

The drawing shows a diagram of a device for measuring the volume of gas flowing through the valves on candle tube.

Device for measuring the volume of gas flowing through valves for spark plug tube contains vertically located spark plug tube 1, the entrance to which is hermetically connected with the outlet shutoff valves and outlet provided with a protective cap 2 having holes 3 for gas outlet to the atmosphere. Before leaving the spark plug tubes installed exhaust valve system comprising a valve plate having rigidly associated with the shaft, the bearings 5 of the valve housing 6 and the elastic element 7, and a valve stem movably mounted in the guide sleeve 8, and its movements are registered by the sensor 9 measuring frequency discontinuous deviations valve time, which is equipped with a valve system. Moreover, the device includes a housing of cylindrical shape, the bottom of which is hermetically Rethimno connected with the upper end of the spark plug tubes, the inner cavity of the case is made with a partition in which you installed the exhaust valve system with a spring-loaded with the preload valve, the upper part of the casing perforated holes which ur using candlestick pipe, including the measurement of the volume of gas flowing through the valves, characterized in that the spark plug tube seal with preload, intermittently, periodically drossellied the exit gas from the spark plug tube into the atmosphere, and the volume of gas flowing through the valves on candle tube, is measured by measuring the frequency of oscillation of the valve membrane.

2. Device for measuring gas leakage in the valve, using the spark plug tubes containing a device for measuring the volume of gas flowing through the valves, characterized in that the vertically located spark plug tube, the entrance to which is hermetically connected with the outlet shutoff valves and outlet provided with a protective cap, with holes for gas outlet to the atmosphere before entering hermetically installed exhaust valve system equipped with a sensor for measuring the frequency discontinuous deviations valve in time.

3. The device according to p. 2, characterized in that it contains a body of cylindrical shape, the bottom of which is hermetically Rethimno connected with the upper end of the spark plug tubes, the inner cavity of the case is made with a partition in which you installed the exhaust valve system with a spring-loaded with the preload valve is electroplated with him the rod, movably mounted in the guide sleeve, and moving the rod relative to the body fixed sensor.

 

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