Method of supplying energy carrier to air-operated drives of main pipeline valving

FIELD: installations for supplying fluid under pressure.

SUBSTANCE: method comprises determining the value of pressure in the vessel preliminary filled with explosion-proof compressible fluid and connected with the distributing device, comparing the value with that required for operation of the motor, and switching valving by the command signal to the air-operated motor of the drive. When the value of pressure in the vessel is higher or equal to the permissible value, the explosion-proof fluid is supplied from the vessel to the air-operated motor, whereas the pumped fluid is not supplied from the pipeline. When the value of pressure is lower than the permissible value, the pumped fluid is supplied from the pipeline to the air-operated motor, and the fluid is not allowed to enter the vessel.

EFFECT: improved environmental protection.

9 cl, 6 dwg

 

The invention relates to pneumatic systems and relates to a method of providing energy, pneumatic, pneumatic-hydraulic actuators and drives with jet engines, primarily for ball valves main gas pipelines and compressor stations, chemical and other enterprises, where the operating conditions are not permitted explosive, flammable and environmentally hazardous energy.

A known method of supplying energy pneumatic drives valves pipelines, in which the command signal for switching the valve to the pneumatic actuator motor performing the specified switching, via the distribution device may be supplied as the fuel for the medium to be pumped from the pipeline(1, 2, 3, 4).

During operation of a pneumatic actuator using energy fluid pipeline (for example, the gas pressure of the main gas pipeline) is a release of spent medium (gas) into the environment.

However, given the enormous number of valves on pipelines and the number of switches, is applied to a large ecological damage to the environment in adjacent areas, there is a risk of gas contamination of premises, and also generate significant economic losses C is the account of the irreparable loss of significant amounts of valuable hydrocarbons.

The present invention is to create an efficient method of supplying energy pneumatic drives valves pipelines.

The technical result consists in the exclusion of damage to the environment, enhancing the safety of operation of the valve and the prevention or mitigation of loss of fluid (gas) when the pneumatic actuator on the valve - ball valves for main gas pipelines.

The essence of the invention is that the method of supplying energy pneumatic drives valves pipelines, in which the command signal for switching the valve to the pneumatic actuator motor performing the specified switching, via the distribution device may be supplied as the fuel for the medium to be pumped from the pipeline, provides that before making the switch valve determines the amount of pressure in the pre-filled explosion-compressible medium capacity, connected to two inputs of the distribution device, and compare this value with sufficient to operate a pneumatic engine value, and if the pressure in the vessel is greater than or equal to the allowable value, served with pneumatic engines is Ely as an energy explosion-proof environment from the tank and not allow the submission to him of the pumped fluid from the pipeline, and if the pressure in the vessel is less valid values are fed to the pneumatic motor as a backup energy source fluid from the pipeline and prevent its entering into the container.

The lling compressible medium is produced periodically using mobile compressor units at least once a year or, in other cases, additionally determining the magnitude of the pressure in the tank during periods when no command signal to the switching, and in case of its decrease below is sufficient to operate a pneumatic engine, producing a lling compressible medium with stationary compressor. In the latter case, additionally determining the magnitude of the pressure in the tank with electric contact pressure gauge, and a compressible medium serves simultaneously or sequentially to multiple pneumatic valve actuators from one tank using the common header.

Preferably the compressible lling environment to produce pressure, less pressure for the fluid in the pipeline, filling capacity compressible medium produced in quantities defined on the basis of a specified number of switching valves for a predetermined period of time, as explosion-compressible medium is used, the air, and PE is ed lling release the latter from the water condensate and a fluid impurities, the energy supplied to the pneumatic motor is subjected to the preparation of, for example, cleaning, drying, separation of oil.

Figure 1 shows a diagram of a device for implementing the method on the individual installing the fitting.

Figure 2 shows a diagram of the device for implementing the method in the group setting of the valve.

Figure 3 shows the electropneumatic control unit.

Figure 4 shows the section a-a plate of the control unit in figure 3.

Figure 5 - design fitting with non-return valve.

Figure 6 - the design of the valve.

On the main pipeline 1 (gas) are individually installed (figure 1) ball valve 2 or other types of valves (valve, gate valve and so on).

On the flange neck extension ball valve 2 being above the earth's surface, is mounted pneumatic actuator 3 pneumatic motor 4. The actuator 3 is connected with two inputs of the distribution device in the form of electro-pneumatic unit 5 of the control.

To power the electro-pneumatic control units 5 is 24 volts or 110 volts DC.

Next to the ball valve 2 under the ground has a capacity of 6, the upper part of which is connected by a duct 7 to the input of the control unit 5. The duct is equipped with electric contact pressure gauge and mounting device 9 for connecting a compressor (not illustrated). Capacity 6 may also be installed above ground or ball valve 2. In a drainage pipe 10 has a valve 11. Before entering the control unit 5 from the container 6 is 12 system air treatment, which may include a filter, a separator, dehydrator, separator, heater and other devices (not illustrated). With the other input of the block 5 on the pipeline 13 14 gas and electroneurography 15. On the duct after system 12 is installed a check valve 16.

At the compressor station group setting (figure 2) ball valve 2 has a stationary compressor 17, the capacity of the system 18 air preparation, which also includes filter, air dryer, drier, oil separator, heater and other necessary devices. Compressor station equipped with valves 19, 23, 26, 27, pulse tubes, manifolds 20, 24, electric contact pressure gauges 21, 25. System 22 preparation and submission transported to the working environment under the pressure of the pipeline 1 is back. The pipeline 28, depicted by the dotted line, is a version of the circuit of figure 2 without the collector 20. Group ball valve 2 shown in figure 2, is conditional. This can be a group of ball valves 2 in the accounting system of the gas flow in response to what italiani or group of ball valves 2 in the trunk pipeline 1 on-site compressor station or several groups in different parts of the territory of the compressor station.

The electropneumatic control unit 5 (figure 3) contains mounted on the plate 29 two pneumatic valve 30 of the levers 38, the block 31 of the electromagnets with the plungers 39 and fittings 32 inputs environments. In the plate 29 (figure 4) provided with channels 34, 35 for the passage of the working medium and two regulator 33 pressure. The pneumatic valves 30 are connected by channels 34, 35 through the openings 36, 37. Pneumatic valve 30 in conjunction with the electromagnet with plunger 39 functional forms electroneurography 15.

Fittings 32 are provided with check valves, which contain the ball 40, a spring 41 and tube 42 with a hole for passage of the working environment.

The socket 43 is equipped with built-in check valves (not illustrated).

In preparation for the implementation of the method of filling 6 compressible medium (figure 1) produced through the device 9, for example, using a mobile compressor units at least once a year for the valve on the linear part of the pipeline 1. Connecting mobile compressor is preferably accomplished using a flexible hose, for example, production of the Ufa plant "Hydraulics".

To the bottom of the tank 6 is connected the drain tube 10, the end of which display above the earth's surface and supply shut-off valve 11.

Through a drainage pipe 10 and valve 11 under the action of pressure in the tank 6 remove water to the completion and other flowable admixture, you can fall into the container 6 on the injection of mobile air compressor. System 12 carries out the training of air, which provides cleaning, dehumidification, drying, oil separation, heating and other necessary on this section of the pipeline 1 operations. In rare performing switching ball valve 2 as the container 6 can be applied to standard compressed air.

The gas supply system from the pipeline 1 pipeline 13 is used as a backup in case of exhaustion of the air supply and the pressure in the tank 6. Gas from the pipeline 1 can be fed through the system 14 gas and electroneurography 15 to the input of the electro-pneumatic control unit 5 and the duct check valve 16, prevents the inflow of gas into the tank 6. The system 14 performs the processing of gas, which provides cleaning, dehumidification, drying, oil separation, heating and other necessary on this section of the pipeline 1 operation.

Preferably used pneumatic actuators 3 with jet pneumatic motors 4, since they are usually at relatively low pressures of about 1.0-2.5 MPa (10-25 kg/cm2), which allows the filling capacity 6 compressible medium to pressure, less pressure for the fluid in which Truboprovod 1. Pneumatic actuators 3 with jet pneumatic motor 4 is configured in conjunction with electro-pneumatic control units 5, which have automatic controllers 33 pressure.

The method is implemented as follows. Command signal for switching the armature - valve 2 to the pneumatic motor 4 drive 3, that the specified switching through the switching unit 5 may be supplied as the fuel for the medium to be pumped from the pipeline 1, provides that before making the switch valve determines the amount of pressure in the pre-filled explosion-compressible medium - air tank 6 connected to two inputs of the distribution device 5, and compare this value with sufficient to operate the pneumatic motor 4 value, and if the pressure in the tank 6 is greater than or equal to the allowable value, serves to pneumatic the engine 4 as an energy explosion-proof environment from the tank 6 and do not allow the supply to him of the pumped fluid from the pipeline 1, and if the pressure in the tank 6 is less valid values are fed to the pneumatic motor 4 as a backup energy source fluid from the pipeline 1 and do not allow her post who came into the container 6.

Filling capacity 6 compressible medium is produced periodically using mobile compressor units at least once a year or, in other cases, additionally determining the magnitude of the pressure in the tank 6 during periods of absence of the command signal to the switching, and in case of its decrease below is sufficient to operate the pneumatic motor 4, make the filling capacity 6 compressible medium with stationary compressor. In the latter case, additionally determining the magnitude of the pressure in the tank 6 via the electric contact pressure gauge 8 (1) or 21 (2), and compressible environment serves simultaneously or sequentially to multiple pneumatic actuators 3 (and 4 engines) valve from one tank 6 through a common manifold 20.

Preferably the filling capacity 6 compressible medium to produce pressure, less pressure of the pumped medium in the pipeline 1, the filling capacity 6 compressible medium produced in quantities defined on the basis of a specified number of switching valves for a predetermined period of time, preferably for the year as explosion-compressible medium is used, the air, and before filling capacity 6 release the latter from the water condensate and a fluid impurities, the energy supplied to the pneumatic motor is Ely 4, subject preparation, for example, cleaning, drying, separation of oil, with the appropriate training system.

Optionally backup the working medium (gas) pipeline 13 (figure 1) and the training system 14 of the working environment may be delivered via an electro-pneumatic valve 15 to the input of the electro-pneumatic unit 5 controls the actuator 3 and the duct 7 check valve 16 prevents the working environment of the pipeline 1 was admitted into the container 6.

Reserve training and supplying fluid under pressure from the pipeline 1 is enabled only in case of exhaustion of the air supply and the pressure in the tank 6. However, the probability of this situation is sharply reduced and, consequently, loss of hydrocarbons will be eliminated or at least drastically reduced (hundreds of times).

At the compressor station for a group of ball valves 2 (2) the air by stationary compressor 17 is pumped into the tank system 18 preparation and filing of air, which includes, filter, air dryer, drier, oil separator, heater and other necessary devices.

When you open the shutoff valve 19 and a closed shut-off valve 23, the air enters the manifold 20 from which the pulse tubes air is fed to the inputs of blocks 5 control the actuators 3. Working pressure is set and controlled by the electric-contact pressure gauge 21.

The existing system 22 training and supplying fluid under pressure pipeline 1 is used as a backup.

When there is insufficient air pressure in the tank system 18, the open shut-off valve 23 and the closed shut-off valve 19, the working medium under pressure from the main pipe 1 enters the manifold 24 from which the pulse tube working environment is supplied to the inputs of blocks 5 control actuator 3.

Thus the air from the distribution pipe 20 is removed to prevent the formation of explosive air-gas mixture. This opens the valve 26 until the complete removal of air. Then the valve 26 is closed.

Energy use air pressure from the compressor 17, the valve 23 is closed, and the working environment of the collector 24 of the control gas is removed through valve 27. After removing the working environment, the valve 27 is closed.

In the absence of the collector 20 of the valve 19 connected to the manifold 24 by a pipe 28 (shown dotted).

One pneumatic valve 30 unit 5 provides a flow of working medium in the pneumatic actuator 3 under pressure, defined by the regulators 33, for his work on closing ball valve 2. Another pneumatic valve 30 provides open is their ball valve 2. Automatic controllers 33 pressure supply pressure of 1.0-2.5 MPa in the jet engine 4 at a pressure of 3.0 to 8.0 MPa at the entrance to the corresponding block 5 of the control.

The channels 34 and 35 are interconnected by means of pneumatic valves 30 through corresponding holes 36 and 37. Electric contact pressure gauge 8 (1) or 21 (2) signals to the solenoid block 31. The pneumatic valves 30 are triggered when the impact on their arms 38 of the solenoid block 31 via the pushers 39.

Check valves in the fittings 32 exclude mixing different primary and backup environments, such as gas and air, when applying one of the environments to the electro-pneumatic unit 5 control 5.

This prevents the formation of explosive gas-air mixture.

Check valves in the fittings 43 prevent the penetration of atmospheric air into the channels of the plate 29.

Possible execution units 5 control will reduce the pressure to the required and sufficient to operate the pneumatic motor 4 values of 1.0-2.5 MPa in the inlet pressure (i.e. in the pipeline 1) - 16.0 MPa. Such pressure will be used for the planned transmission pipelines in the future.

Thus, sufficient for operation of the jet engine 4 air pressure can be much lower pressure in the pipe 1 of the main gas pipeline,which is much safer and economically feasible. To provide such a pressure suitable mobile compressors type GCP-55".

For pneumatic actuators used compressed air energy, not the energy of compressed gas. This prevents the loss of valuable gas and prevents damage to the environment.

The following example installation for implementing the method can be implemented independently or in combination with already existing systems use the pressure of the transported gas pipeline 1.

Thus, implementation of the proposed method is feasible using existing in the present technical means.

During actuation of the valve 2 in the environment could be discarded on average from 0.8 normal cubic meters of gas (for valves DN 300 mm) up to 1.6 normal cubic meters of gas (for valves DN 1000 mm). (According to test results on the ground DOAO "Orgenergogaz" Saratov).

Normal cubic metre (nm3) the volume of gas (air) at normal atmospheric pressure (760 mm Hg) and normal temperature (plus 25°).

In the Control system for the transportation of gas and gas condensate in Russia there are about 300 thousand ball valves (not counting system of gas production).

The consumption of the energy source when the switching valve depends on the diameter of the main pipeline and the pressure in it. If you take an average if one closing or opening of the ball valve 2 release 1.0 in normal cubic meter of gas, the total daily volume of the discharge will be 300 tysm3gas or damage valued at $ 48 million at a price of $ 160 per 1,000 nm3gas. The constant rise in gas prices and the length of the pipeline (i.e. the number of operating valves) confirms the economic viability of the use of the present invention due to the replacement of gas with air as an energy source.

The use of the proposed method is safe, eliminate harm to the environment and eliminates the economic damage, as it does not emit valuable gas in the environment and at the same time, addressed the issue of reducing emissions to the atmosphere in accordance with the requirements of the Kyoto Protocol.

SOURCES of INFORMATION

1. Gurevich, A.F., zarinsky O.N., Kuzmin J.K. Reference valves for gas and oil pipelines. Leningrad, Nedra, 1988, pp.96, 116.

2. EN 2131065, 17.03.1998,, F, 15 B 9/03.

3. EN 2201537, 23.04.2002,, F, 15 B 9/03.

4. EN 2174629, 27.12.2000,, F, 15 B 9/03.

1. The method of supplying energy pneumatic drives valves pipelines, in which the command signal for switching the valve to the pneumatic actuator motor performing the specified switch, through Raspredelitelnaya can be served as the fuel for the medium to be pumped from the pipeline, characterized in that before the implementation of the switching valve determines the amount of pressure in the pre-filled explosion-compressible medium capacity, connected to two inputs of the distribution device, and compare this value with sufficient to operate a pneumatic engine value, and if the pressure in the vessel is greater than or equal to the allowable value, serves to pneumatic motor as an energy explosion-proof environment from the tank and not allow the submission to him of the pumped fluid from the pipeline, and if the pressure in the vessel is less valid values are fed to the pneumatic motor as a backup energy source fluid from the pipeline and do not allow its receipt in the container.

2. The method according to claim 1, characterized in that the filling capacity of the compressible medium is produced periodically using mobile compressor units.

3. The method according to claim 1, characterized in that it further determines the amount of pressure in the tank during periods when no command signal to the switch, and in the case of mitigation, the following is sufficient to operate a pneumatic engine, producing a lling compressible medium with stationary compressor.

4. The method according to any of the at one of claims 1 to 3, characterized in that the filling capacity of the compressible medium to produce pressure, less pressure for the fluid in the pipeline.

5. The method according to claim 3, characterized in that it further determines the amount of pressure in the tank with electric contact pressure gauge, and a compressible medium serves simultaneously or sequentially to multiple pneumatic valve actuators from one container.

6. The method according to claim 5, characterized in that serves compressible environment to multiple pneumatic valve actuators from one tank using the common header.

7. The method according to any one of claims 1 to 3, characterized in that the filling capacity of the compressible medium is produced in quantities defined on the basis of a specified number of switching valves for a predetermined period of time.

8. The method according to any one of claims 1 to 3, characterized in that as explosion-compressible medium is used, the air, and before lling release the latter from the water condensate and a fluid impurities.

9. The method according to claim 2, characterized in that the filling capacity of the compressible medium is produced using a mobile compressor units at least once a year.

10. The method according to any one of claims 1 to 3, characterized in that the energy supplied to the pneumatic motor is subjected to the preparation, such as clearing, about what ucheniu, the separation of the oil.



 

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