Procedure for control over tightness of ball valve of multi-purpose accessories of main and device for its implementation (versions)

FIELD: machine building.

SUBSTANCE: group of inventions refers to tightness tests of ball valves of multi-purpose accessories (MPA) of main. The procedure for check of ball valve tightness of multi-purpose accessories of mains consists in connection of a drain tube to a cavity of the checked valve and in measurement of static pressure in pipelines of high and low pressure in the main, and also in the cavity of the ball valve. Also, successively in time, first the low pressure pipeline of the main is connected with the drain tube; under the set mode there is measured flow rate of transported medium downstream through the first packing of the ball valve. Further, the high pressure pipeline is connected and flow rate is measured through the second packing of the ball valve. Finally, there is measured summary flow rate of transported medium running through the first and second packing of the ball valve. There are compared values of measured summary flow rate with sum of earlier measured values of flow rates. If summary flow rate is not equal to sum of earlier measured values of flow rates, there is diagnosed leak of transported medium through the ball valve into atmosphere. There are disclosed versions of devices for check of tightness of the ball valve of multi-purpose accessories.

EFFECT: upgraded accuracy of measurements of gas flow rates due to direct measurements of gas flow rates though each packing of MPA downstream of gas; evaluation of gas flow rate leaking to atmosphere.

15 cl, 2 dwg

 

The invention relates to pipeline transport and can be used for testing the tightness of ball valves shut-off and control valves.

The known method of the same purposes, consisting in pulsed injection into the flow of gas at the entrance to the AJA portion of the indicator strip, forming a tag and registration with the concentration of sensors located at a certain distance from each other along the pipeline, the time of propagation of the label by passing it the AJA. In addition, determine the magnitude of the spatial broadening of the label after it passes the caraway seeds.

Time lag and the magnitude of the broadening of the label is judged volumetric flow of gas transported through the closed ball valve caraway seeds, i.e. on the amount of gas leakage and tightness of the ball cock /Patent RF №2317482, CL F17D 5/02, 2007/.

A known system for a similar purpose, containing the trace gas injector and sensors, the concentration of indicator gas, located on different sides of the AJA at a certain distance from the injector /Patent RF №2309323, CL F17D 5/02, 2007/.

In the analog measure the transit time of the indicator gas (label) is known distances, and the concentration of indicator gas in the label, they will judge the flow of the transported gas leaking through the closed gate ball valve is the AJA, that is about the tightness of the valve.

The lack of analogues of the method and device is the low accuracy of determination of gas flow through the AJA associated with the blurring of the mark and the impossibility of determining gas flow separately through each seal caraway seeds, as well as the impossibility of determining the gas flow passing through the shut-off tilt valve of the faucet into the atmosphere.

The known method of the same purposes, which consists in connecting to the cavity of the controlled valve drain tube and measuring the static pressures in the pipelines of high and low pressure pipeline, as well as in the internal cavity of the ball valve /Overview. Ser. Transport and underground storage of gas. - M.: OOO "IDC Gazprom", 2002, C-25/.

This method is adopted for the prototype. In the prototype method, the static pressure measured in the drainage tube at the open and closed drain valve. This allows a system of equations, solving which can determine the gas flow through the damaged seal ball valve without identifying the number of damaged seals.

A device of the same purposes, adopted as a prototype of both variants of the device containing the drainage tube with the first shut-off valve, pneumatically connected to the cavity of the crane, and three inverter static pressure is tion, connected to the pipelines of high and low pressure, and cavity ball valve /Overview. Ser. Transport and underground storage of gas. - M.: OOO "IDC Gazprom", 2002, s-25, 8/.

In the prototype variants of the device to a drainage tube connected camera in the lid which made the calibrated hole and measured the flow rate of gas from this calibrated orifice, expressed in terms of the physical parameters of the gas.

Then on mathematical ratio determine the gas flow through a leak in the shutter caraway seeds regardless of the specific damaged the seal.

The disadvantages of the prototype of the method and the device are the low accuracy of the measurement gas flow associated with a large number of assumptions when writing equations, from which the gas flow, and the impossibility of direct measurements of gas flow through each valve seat caraway seeds separately, including the seal that separates the internal cavity of the valve from the atmosphere.

The technical result from implementation of the invention is the provision of opportunities for measurements of gas flow through each valve seat separately, including the seal that separates the internal cavity of the valve from the atmosphere.

This technical result in part of the way to reach due to the fact that investompania control the tightness of the ball valve shut-off and control valves of the pipeline consisting in connecting to the cavity of the controlled valve drain tube and measuring the static pressures in the pipelines of high and low pressure pipeline, as well as in the cavity ball valve, sequentially in time with the drainage tube, first connect the low pressure pipeline pipeline and in the steady state measure it flow q1the transported fluid through the first flow seal ball valve, then the high pressure pipeline with subsequent measurement of the flow rate q2through the second seal ball valve, and then measure the total flow rate q of the transported fluid passing through the first and second seal ball valve, and compare the measured value of the total flow q with total q1+q2previously measured values of costs, and when q≠q1+q2, diagnose the presence of leakage of the transported fluid through the ball valve into the atmosphere.

The time of appearance of the steady-state modes in the measurement of the cost of q1, q2and q respectively define the equality of the static pressure in the cavity of the controlled valve and the pipeline of low pressure in the cavity of the valve and the high pressure pipeline and the pipelines of high and low pressures.

The technical result in the Asti first variant of the device reach due to the fact, in a known device for controlling the tightness of the ball valve, valves, containing the drainage tube with the first shut-off valve, pneumatically connected to the cavity of the crane, and three inverter static pressure, is connected to the pipelines of high and low pressure, and the cavity of the ball valve, and further comprises a pulse tube high and low pressure, the first and second flow meters and five additional shut-off valves, while the pulse tube high pressure connected in series through the second valve and the first flow meter is connected to a drainage tube from one side of the first valve and the third valve is connected to the drain the tube on the other side of the first shut-off valve, and a pulse tube low pressure through the fourth valve connected to a drainage tube and a third valve on one side of the first valve and connected in series through the fifth valve and the second flow meter is connected with the drain tube on the other side of the first valve, and the outlet of the second flow meter is additionally connected via a sixth valve with the atmosphere.

A pulse tube connected to a drainage tube at one point.

Pulse tube, drainage tube and the first valve drain tube connected at one takecares crossbar.

As flow meters are used for flow meters.

The valves are made in the form of remotely controlled valves.

As flowmeters are applied non-reversing flow.

Before flowmeters installed filter elements.

The technical result in part of the second variant of the device reach due to the fact that the known device for controlling the tightness of the ball valve, valves, containing the drainage tube with the first shut-off valve, pneumatically connected to the cavity of the crane and three inverter static pressure, is connected to the pipelines of high and low pressure, and the cavity of the ball valve, and further comprises a pulse tube high and low pressure, reversing the flow meter and five additional shut-off valves, the second valve installed in a pulsed high pressure hose, and reverse - flow in the drainage tube, pulse the high pressure hose is connected through the third valve with drain tube from the side of the first valve and a second valve connected to the drainage tube by reversing the flow meter, the pulse tube low pressure is connected via the fourth valve with drain tube from the side of the first valve and through the fifth valve connected with renagel tube by reversing the flow meter, United are also through the sixth valve with the atmosphere.

A pulse tube connected to a drainage tube at one point.

A pulse tube connected to a drainage tube through the crossbar.

As a reversing flow meter is applied flow reverse flow.

The valves are made in the form of remotely controlled valves.

Before reversing the flow meter with the two sides set filter elements.

The invention illustrated by the drawings. Figure 1 shows the diagram of the first variant of the device that implements the method, and figure 2 - scheme of the second variant of the device that implements the method.

The device according to the first and second variants of the method contain six shut-off valves 1...6 (for convenience, non shut-off valves in the description match the numbers of the shut-off valves both variants of the claims).

There are also three converters 7, 8, 9 static pressure in the drain pipe 10, the pulse tube 11 high pressure and pulse tube 12 low pressure.

In the first variant of the device (figure 1) contains two flow meter 13, 14 preferably flowing installed in the pulse tubes 11, 12 high and low pressures. In the second case (figure 2) has a single reversible preferably a flow meter 15 installed in the drainage tube 10.

Seals the Oia in ball valve is represented in the drawings, the Roman numerals I, II, III.

Pneumatic connection between the elements of the device represented in the drawings.

The pulse tube 11, 12 high and low pressures respectively connect the pipe 16 high pressure pipeline 17 to the low pressure at the point A.

The inner cavity 18 ball valve (vnutriklassovaya cavity) is connected to point a through a drainage tube 10 with a pulse tubes 11, 12 high and low pressures.

Converters 7, 8, 9 static pressures are connected respectively to the pulse tube 11 high pressure to the drainage tube 10 and to the pulse tube 12 low pressure.

The valves 1, 2, 5 respectively installed in the drainage tube 10, in the pulse tube 11 and high pressure in the pulse tube 12 low pressure.

The pulse tube 11, 12 high and low pressures are connected at point B with a drainage tube 10 through the valves 3, 4.

In the first variant of the device (1) outputs of the flow meter 14 and the pulse tube 12 low pressure connected at point b, and from it through the valve 6 with the atmosphere.

In the second variant of the device (figure 2) outputs of the reversible flow meter 15 and the pulse tube 12 low pressure is connected at point b and through the valve 6 with the atmosphere (points a, b can be combined).

The pulse tube 11, 12 high and low pressure can be together is s with a drainage tube 10 at the point B via the d-pad, and in point And through the tee.

Before flow meters 13, 14, 15 can be installed filter elements, and the valves 1...6 can be performed remotely-managed.

The method is implemented in two variants of the device is as follows.

When the control during the first gas seal I ball valve first opens the valve 4 and equalize the static pressure in vnutrirodovoe cavity 18 (in a drainage pipe 10 and the pipe 17 to the low pressure.

Equality of pressure P2, R3controlled by the testimony of the converters 8, 9 static pressure.

Then open valves 1, 5, and close (or remain closed) valves 2, 3, 4, 6. Gas from the pipeline 16 high pressure will flow in the directions of the solid arrows in the pipeline 17 low pressure, bypassing the drainage tube 10 with the valve 1, the flow meter 14, the pulse tube 12 of the low pressure valve 5 (the first option 1), or through the drainage tube 10 with the valve 1 and the reversing flow meter 15 and the pulse tube 12 with the valve 5 (the second option, figure 2).

When this flow meters 14, 15 show the flow q1gas through a faulty seal I of the crane.

Close all valves and begin testing seal II valve.

Open the valve 3 and equalize the pressure in the pipe 16 high pressure and in vnutrirodovoe cavity 18 (and the drainage tube 10).

Equality static pressure control using converters 7, 8 static pressure of the gas.

Then, when the control seal II valve is kept open valves 1, 2 and closed the valves 3, 4, 5, 6.

When the gas is directed in the direction of the dashed arrows from the pipeline 16 high pressure through a faulty seal II in the pipeline 17 low-pressure bypass pulse tube 11 high pressure valve 2 flow meter 13 and the drain tube 10 with the gate 1 (the first variant, figure 1) or the flow meter 15 (the second option, figure 2).

When this flow meters 13, 15 show flow q2through the seal II valve.

Further testing will determine the amount of leakage of gas into the atmosphere through the seal III between the rotary spindle and the housing (not digitized).

Close all the valves and then open the valves 1, 6. Gas piping 16, 17 high and low pressure through the seal I, II flows into the drainage tube 10 and through the valve 1, the flow meter 14 (the first variant, figure 1) or through reversing the flow meter 15 (the second option, figure 2)and also through the valve 6 into the atmosphere in the direction of the dash-dotted arrows.

While the flow meter 14 (1) or reverse the flow meter 15 (figure 2) will show the total flow q through the first and second seals of the crane.

Compare the amount of the total q with the amount of expenses q 1+q2through each of the seals I, II crane.

When q≠q1+q2, diagnose the presence of gas leakage through the seal III in the atmosphere.

Thus, using the method and device for its implementation costs are measured q1, q2transported medium through each of the seals along the gas separately, the total flow q through the seal and the gas flow through the third seal that separates the internal cavity of the valve from the atmosphere.

This achieves the technical result.

1. The way to control the tightness of the ball valve shut-off and control valves pipeline, which consists in connecting to the cavity of the controlled valve drain tube and measuring the static pressures in the pipelines of high and low pressure pipeline, and in the cavity of a ball valve, wherein sequentially in time with the drainage tube, first connect the low pressure pipeline pipeline and in the steady state measure it flow q1the transported fluid through the first flow seal ball valve, then the high pressure pipeline with subsequent measurement of the flow rate q2through the second seal ball valve, and then measure the total flow q tra is sportivnoj environment, passing through the first and second seal ball valve, and compare the measured value of the total flow q with total q1+q2previously measured values of costs, and when q≠q1+q2,diagnose the presence of leakage of the transported fluid through the ball valve into the atmosphere.

2. The method according to claim 1, characterized in that the time of appearance of the steady-state modes in the measurement of the cost of q1, q2and q respectively define the equality of the static pressure in the cavity of the controlled valve and the pipeline of low pressure in the cavity of the valve and the high pressure pipeline and the pipelines of high and low pressures.

3. Device for testing the tightness of the ball valve, valves, containing the drainage tube with the first shut-off valve, pneumatically connected to the cavity of the crane, and three inverter static pressure, is connected to the pipelines of high and low pressure, and the cavity of the ball valve, characterized in that it further comprises a pulse tube high and low pressure, the first and second flow meters and five additional shut-off valves, while the pulse tube high pressure connected in series through the second valve and the first flow meter is connected with the drain tube on the one side who were the first valve and the third valve connected with the drain tube on the other side of the first shut-off valve, and pulse tube low pressure through the fourth valve connected to a drainage tube and a third valve on one side of the first valve and connected in series through the fifth valve and the second flow meter is connected with the drain tube on the other side of the first valve, and the outlet of the second flow meter is additionally connected via a sixth valve with the atmosphere.

4. The device according to claim 3, characterized in that the pulse tube connected to a drainage tube at one point.

5. The device according to claim 4, characterized in that the pulse tube, drainage tube and the first valve drain tube connected at one point over the crossbar.

6. The device according to claim 3, characterized in that as flow meters are used for flow meters.

7. The device according to claim 3, characterized in that the valves are made in the form of remotely controlled valves.

8. The device according to claim 3, characterized in that as flowmeters are applied non-reversing flow.

9. The device according to claim 3, characterized in that before flowmeters installed filter elements.

10. Device for testing the tightness of the ball valve, valves, containing the drainage tube with the first shut-off valve, pneumatically connected to the cavity of the crane and three inverter static pressure, p is clucene to pipelines of high and low pressure, and cavity ball valve, characterized in that it further comprises a pulse tube high and low pressure, reversing the flow meter and five additional shut-off valves, the second valve installed in a pulsed high pressure hose, and reverse - flow in the drainage tube of the pulse tube high pressure is connected through the third valve with drain tube from the side of the first valve and a second valve connected to the drainage tube by reversing the flow meter, the pulse tube low pressure is connected via the fourth valve with drain tube from the side of the first valve and through the fifth gate connected to the drain tube from the side reversible flow meter connected via a sixth valve with the atmosphere.

11. The device according to claim 10, characterized in that the pulse tube connected to a drainage tube at one point.

12. The device according to claim 11, characterized in that the pulse tube connected to a drainage tube through the crossbar.

13. The device according to claim 10, characterized in that as a reversing flow meter is applied flow reverse flow.

14. The device according to claim 10, characterized in that the valves are made in the form of remotely controlled valves.

15. The device according to claim 10, characterized in that the re is Erzurum flow meter with two sides installed filter elements.



 

Same patents:

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2 dwg

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2 cl

FIELD: machine building.

SUBSTANCE: invention can be implemented for testing multi-purpose accessories (MPA) of main (M). The essence of the invention is as follows: a draining tube (DT) is connected to inter-cock cavity of the ball cock and to pipelines of high and low pressure (HPP and LPP) via pulse tubes of high and low pressure (HPPT and LPPT). An electro-magnet valves (EMV) are installed in the HPPT and LPPT, while a reverse flow metre is installed in the DT. The reverse flow metre and outlets of pulse tubes are communicated with atmosphere via a pneumatic crosspiece. Controlled inputs of the EMV are coupled to the output of the server via an analogue-digital converter. The output of the flow metre is connected to the input of the server via the analogue-digital converter. The system facilitates measuring gas leaks through the first and the second sealing down gas stream at the ball cock of the MPA by means of the reverse flow metre under the automatic mode.

EFFECT: upgraded accuracy of measurements of gas leaks and automation of measuring process.

5 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: pipeline (17) of high pressure (HPP) and pipeline (18) of low pressure (LPP) of main are connected to drain tube (8) coupled with cavity of ball cock (9) by means of pulse tube (10) of high pressure (HPPT) and pulse tube (11) of low pressure (LPPT). Three valves (1, 2, 5) and flow metre (14) are installed in the drain tube. Two by-pass tubes (12, 13) with valves are arranged parallel to the drain tube. By switching corresponding valves transported medium is first directed downstream through the first packing (20) of cock (9) and further through the second packing (21) of the cock. Also fluid medium always flows from inlet to outlet of the flow metre (for example, vortex or heat one), which readings are accepted as value of medium leaks though a ball cock.

EFFECT: facilitating control of leaks through each packing of ball cock.

2 cl, 1 dwg

FIELD: transportation.

SUBSTANCE: in method, which consists in connection of drain tube to cavity of valve and measurement of static pressures in pipelines of high and low pressures, and also in cavity of ball valve, additionally high pressure pipeline is connected to drain tube, and in established mode gas flow is measured in it through seal between valve cavity and low pressure pipeline, then low pressure pipeline is connected with further measurement of gas flow in drain tube through seal between high pressure pipeline and cavity of ball valve. Device additionally comprises pulse tubes of high and low pressures, the first and second flow metres and third stop valve, besides high pressure pulse tube is installed between high pressure pipeline and drain tube, and low pressure pulse tube - between drain tube and low pressure pipeline, besides the first flow metre with according stop valve are serially installed in the first pulse tube, and the second flow metre with according stop valve are serially installed in the second pulse tube.

EFFECT: possibility to separately measure flows through seals of stop and control valves by direct method with the help of flow metres.

7 cl, 1 dwg

FIELD: physics.

SUBSTANCE: sensor line has a supporting pipe whose wall has openings which are closed with at least one chlorine-permeable layer consisting of halogen-containing siloxane rubber. Chlorine can be used as the said halogen. Non-cross-linked siloxane rubber may be deposited on the supporting pipe when making the sensor line, after which the supporting pipe coated with siloxane rubber may be treated with liquid or gaseous chlorine or chlorine etching agent. A sheath may be worn around the supporting pipe, where the sheath consists of cross-linked siloxane rubber after treatment with liquid or gaseous chlorine or chlorine etching agent. Siloxane rubber for which at least a portion of the silicon atoms is bonded to a halogenated hydrocarbon residue as an organic residue may also be deposited on the supporting pipe.

EFFECT: design of a sensor line which may be suitable for detecting leakage in installation parts containing chlorine.

5 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: procedure consists of assembly of two coupled semi-cases with plug and seat, in boring aperture for flange installation and in welding flange around circumference to edge of bored aperture. An additional recess is made in an upper journal of the plug. Boring of the matching bore for installation of the flange is preliminary made in two coupled semi-cases of the valve. Diametre of the matching bore is 1-2 mm bigger, than matching diametre of the flange. The plug and the seat with associated elements are installed in the case of the global valve. The coupled semi-cases are inter-tightened providing a welding gap along perimetre of a locking seam. The locking seam is welded; the flange is assembled upon case cooling. The flange is fixed in process accessories. Axis of process accessories maximally coincides both with axis of the plug and axis of the flange. Process accessories with the attached flange are arranged in the recess of the upper journal of the plug. Thus fitted flange is tack welded to the case of the global valve in several points. Further bottom run is welded. The process accessories are removed and the seam is finally welded. When the case is cooled, the global valve is finally assembled with installation of a spindle and sealing with associated elements.

EFFECT: increased service life of global valve and its reliability during operation, reduced total labour input for assembly.

3 dwg

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