Automatic emergency shutdown of the pipeline if it is damaged
(57) Abstract:The invention relates to a valve and can be used for the transportation of gases by pipelines. Automatic emergency shutdown of the pipeline solves the problem of increasing the safe operation of pipelines and reduce gas losses with their injuries. When in operational mode, the pressure in the pipeline is changed from low speed. The distribution valve 16 by a spring 23 is drawn in to the body 1, and the liquid 3 flows through the annular channel 29 of the throttle device between the cavity 25 and the tank 2 without creating a differential pressure on the piston 12 of the hydraulic dampers. When the damage to the gas pressure therein begins to decline sharply. The hydraulic resistance of the annular channel 29 prevents rapid movement of the piston 12 and to reduce the force of the spring 14, which moves down the plate 15 with the distribution valve 16. The latter breaks the membrane 18, and opens up access gas from the cavity 20 in the flange 19 to the outlet chamber 22 and cavity control stop valve on the gas pipeline. A stop valve is closed by turning off the damaged area. A distinctive feature of the machine is that throttle calcev the creation of a processing machine at the same rate of pressure drop in the pipeline in winter and summer. The rate of pressure drop, which must operate the machine, can be tuned by adjusting the length of the throttle channel. C.p. f-crystals, 5 Il. The invention relates to a valve and can be used for the transportation of gases by pipelines.Known machines for emergency shutdown of the pipeline if it is damaged, which includes a distribution device for drive control stop valve on the gas line and the sensors are responsive to changes in the rate of fall of pressure containing cylinders associated with the gas pipeline through the holes of small cross section (see the prospectus of the company Samego and Andreev, A. Shutoff valves. Leningrad: Nedra, 1974, S. 171).There are also known machines emergency shutdown of the pipeline if it is damaged, containing switchgear, reacting to changes in the velocity of the gas stream (see, for example ABT. St. USSR N 189271, CL F 16 K 17/34, 1961).The main disadvantage of these structures is the presence of holes of small cross section for the flow pumped by pipeline gas, which in operational terms clogged liquid or mechanical impurities present in the gas, which leads to nasrabadi who is improving the reliability of the machine. Expected from the use of the effect is as follows. First, the distribution valve provides the passage to the actuator of the locking member only upon rupture of the membrane, which prevents leakage of gas to the actuator of the locking member on the pipeline. Secondly, the throttle device for hydraulic dampers allows you to ensure stable operation of the machine at different ambient temperatures. Thirdly, there is the possibility of opening the tubes to a throttle device for adjusting the length of the annular channel that allows you to adjust the boundary of the rate of pressure drop at the desired value. Fourth, install the piston return valve ensures that when connecting the machine to the gas quick installation into position and secure fill the machine nonfreezing liquid. Fifthly, use one of the tareley for the spring as the piston of the hydraulic dampers greatly simplifies the design and improves the manufacturability of the machine.The invention consists in that the machine containing the dispenser is installed in the valve body, the first and second control chambers connected to the pipeline, which has thornylee spring of the first piston, fitted in the lower end of the body at the upper end of which has a second piston associated with placed in the bore of the housing with a piston of hydraulic dampers, spring-loaded, connected via a plate with the first piston, and a reservoir filled with a nonfreezing liquid and coupled with podpornoy cavity hydraulic dampers, nadporshnevaya cavity which is connected to the tank through the throttle annular channel of small cross section, formed reinforced on the bottom of the tank upper and lower disks, between which is located the inner disk thickness equal to the height of the throttle annular channel made of a material with a coefficient of linear expansion greater coefficient of linear expansion of the material of the upper and lower disks, moreover, the larger and the smaller diameters of the throttle ring channel is limited, respectively, the lower and inner disks, and its cavity communicates with the tank through openings in the upper disk, close the tubes with the possibility of changing the length of the flow part throttle annular channel. While the first and second control chambers respectively formed under the bottom end of the first and above the upper end face of the second piston, and the output chamber is formed about ARCOM, the first piston is supported on a thin metal membrane, sandwiched between the lower end of the body and mounted on the end flange with the provision of rupture of the membrane at the bottom position of the piston.Automatic emergency shutdown of the pipeline shown in Fig. 1; Fig. 2-5 depicts the throttle device of hydraulic dampers.The machine is assembled in the cylindrical housing 1, a closed top cover 2, combined with a reservoir, which flooded the nonfreezing liquid 3. In the bore of the center of the cover 2 (tank) pressed Buchs 4 inside of the piston 5 with the sealing ring 6. The cavity 7 above the piston 5 through the flange 8 is connected to the pipeline. The tank is closed by a cover 9. The force on the piston 5, the pressure of the gas in the pipeline is transmitted by a rod 10, which is located in the bore of the cover 2 with the sealing ring 11, the piston 12, is placed in the internal bore of the housing 1. The gap between the housing 1 and the piston 12 is sealed with a ring 13. Spring 14 mounted under the piston 12, perceives the force transmitted from the piston 5. The lower end of the spring 14 supported on the plate 15, propped up by the distribution valve 16 located in the bore of the housing 1, condensed rings 17. The bottom end of the spool 16 having the same diameter, and then the ü 20 which is also connected to the pipeline, as the cavity 7, the pipeline 21. To the distribution valve 16 connected to the output chamber 22, soamsawali driven stop valve installed in the pipeline. The distribution valve 16 is pressed against the plate 15 additional spring 23. The cavity 24 below the piston 12 and the cavity 25 above the piston 12 is filled nonfreezing liquid. The cavity 24 is communicated with a reservoir in the lid 2 by a pipe 26. The piston 12 is integrated non-return valve 27 to allow the free flow of liquid filled from the cavity 24 in the cavity 25. The flow of fluid from the cavity 25 in the tank through the opening 28 in the cover 2 and through the throttling device. The throttle device is made in the form of an annular channel 29 small section formed by the upper 30 and lower 31 discs, between which enclosed the inner disk 32. The upper 30 and lower 31 discs made of a material having a smaller linear expansion coefficient than the inner disk 32. The gaps between the disks condensed rings 33 and 34. The fluid from the holes 28 flows into the hole 35 in the lower disk 31 with a sealing ring 36. It then passes through the annular channel 29 of small cross section and flows into the tank through the opening 37 in the upper disk 30. Holes 35 and 37 separated by a short resident who claim 32 and provides jamming in the channel 29 harness 38. The release of liquid from the channel 29 in the tank can be carried out not only at the end of the channel 29 through the opening 37, and previously through the hole 40 provided that the removal of the tube 41. Holes such as hole 40 located along the channel 29, you can adjust the length of the throttle channel. Mount the throttle device at the bottom of the tank is performed by the screws 42.When in operational mode, the pressure in the pipeline is changed from low speed. The distribution valve 16 by a spring 23 is drawn in to the body 1, and the liquid 3 flows through the annular channel 29 of the throttle device in the tank without creating a differential pressure on the piston 12 of the damper. When the damage to the gas pressure therein begins to fall sharply. The hydraulic resistance of the annular channel 29 prevents rapid movement down the plate 15 with the distribution valve 16. The latter breaks the membrane 18 on which it is based, and open access gas from the cavity 20 in the flange 19 to the outlet chamber 22 and cavity control stop valve on the gas pipeline. A stop valve is closed. 1. AUTOMATIC EMERGENCY SHUTDOWN of the PIPELINE IF IT is DAMAGED, containing the dispenser is installed in the Cabinet zolotnikovskoy drive, the control cavity which is connected to the output chamber, wherein the valve is made in the form of a spring-loaded first piston fitted in the lower end of the body, on the top end which has a second piston associated with placed in the bore of the housing with a piston of hydraulic dampers, spring-loaded, linked through the plate with the first piston, and a reservoir filled with a nonfreezing liquid and coupled with podpornoy cavity hydraulic dampers, nadporshnevaya cavity which is connected to the tank through the throttle annular channel of small cross section, formed reinforced on the bottom of the tank upper and lower disks, between which is located the inner disk thickness, equal to the height of the throttle annular channel made of a material with a coefficient of linear expansion greater coefficient of linear expansion of the material of the upper and lower disks, the greater and lesser diameters throttle annular channel is limited to the lower inner rims, and its cavity communicates with the tank through the holes in the upper disc, sealed tubes, with the possibility of changing the length of the flow part throttle annular channel, while the first and second opravlyaushi, and the output chamber is formed by the opening in the lower end of the body, United in the lower position of the first piston with a cavity beneath its bottom end.2. Machine under item 1, characterized in that the first piston is supported on a thin metal membrane, sandwiched between the lower end of the body and mounted on the end flange with the provision of rupture of this membrane in the lower position of the first piston.
SUBSTANCE: method comprises using energy of fluid flow for shutting off the flow. The device comprises the mechanism for shutting off the fluid flow actuated by heat of fire zone.
EFFECT: enhanced reliability of method and device.
SUBSTANCE: invention is intended for use in well gas-condensate deposits for automatic closure of high pressure pipeline in case of emergency pressure value in it. Stop and control device comprises stop mechanism 1 installed in gas pipeline with inlet 2 and outlet 3 channels and working cavity of control 5. Pilot valve 12 is arranged in the form of spring-loaded distributor, connected by channel 18 to source of control medium 19, and by channel 20 - to cavity of stop mechanism control. Device is equipped with the third 21 and fourth 22 channels with check valve 23 installed in the latter. Channel 21 communicates working cavity of control to inlet channel of locking mechanism. Channel 22 communicates pilot valve 12 to outlet channel 3 of stop mechanism. Pilot valve 12 in one position communicates channel 18 and channel 20, and in the other - channel 20 and channel 22. Stop mechanism is arranged as stop and control with controlled support 4. Working cavity of control 5 represents under-piston cavity of piston drive 6. In above-piston cavity there is a controlled support 4 installed. This cavity is connected to inlet channel 2 via through axial channel 8 in stem 9 of piston 10. Spring-loaded distributor is arranged as two-position and installed over piston drive 6 with creation of cavity 11 connected to outlet channel 3. In channel 21 upstream inlet channel 2 there is a unit of inhibitor 24 batching, which is intended to automatically maintain specified flow of inhibitor supplied to gas well pipeline in order to prevent formation of hydrates.
EFFECT: control of gas well gas flow and automatic maintenance of specified inhibitor flow.
FIELD: machine building.
SUBSTANCE: gas pressure control with a drive, a control valve and an auxiliary device. Information on outlet pressure is supplied to the drive and the auxiliary device by means of a Pitot tube located at the control valve outlet. End of the first nozzle of the Pitot tube is connected to the drive, thus providing communication between a control cavity of the drive and a membrane and outlet pressure at the outlet to maintain outlet pressure on the drive in compliance with the specified value. End of the second nozzle of the Pitot tube is connected to the auxiliary device, thus providing communication between internal area of the auxiliary device and outlet pressure at the outlet to respond to outlet pressure variations at deviation of outlet pressure from specified values of the range of normal pressure. There is a structural version of design of gas pressure control and a double-control mechanism for the above pressure control, automatic control of fluid medium pressure.
EFFECT: automatic fluid medium pressure control.
27 cl, 9 dwg
FIELD: machine building.
SUBSTANCE: check rotary valve contains a body with bonnet, and installed in the body rotary poppet with seat, and stock passing through the bonnet. The stock is hingedly connected with the poppet. The valve is equipped with the pneumatic drive of the stock for the poppet closing, and with spring drive of the stock for its passive opening. The valve is equipped with control system activating the pneumatic drive when the medium pressure inside the valve achieves the specified value of closing, and deactivating the pneumatic drive when the medium pressure inside the valve achieves the specified value of opening.
EFFECT: widening of range of possible use of check rotary valve, improved technical and economic characteristics due to increased safety, reliability, and increased service life.
7 cl, 5 dwg
FIELD: machine building.
SUBSTANCE: invention relates to a pipe fitting and is intended to serve in emergency operation systems and components of a large unit capacity with high energy parameters. Flow part of a safety device is shaped as a nozzle. In inlet pipe 2 there is a tapered portion of nozzle. In outlet pipe 3 there is an expanding portion of nozzle. In bulb stopper 4 there is a minimum nozzle section with diameter equal to calculated diameter of passage section of tap. Return device is integrated with a piston drive in one power cylinder 7 of double action. Working chamber 8 and working cavity 9 of return device are linked via through-channel 12 in differential piston 6 and connected with reset through pulse safety valve 14.
EFFECT: higher efficiency of protection of secure facility.
4 cl, 5 dwg
FIELD: valves production.
SUBSTANCE: present invention relates to normally open valves and is intended to shut off the flow of a working medium from one line to another. Valve comprises a body with inlet and outlet pipes and hamber with a crossover plug. There is a boss with a bore in the body. There is a jet with tapering and widening cavities on the inlet side of the body. There are two grooves along the axis of the input of the body. There is a spring-loaded stepped plug with a piston in the case grooves. Case has channels that connect the input cavity til the jet nozzle and the above-piston cavity of the stepped plug with the piston valve via the boss groove. There is a boss with stepped grooves perpendicular to the axis of the jet nozzle, the stepped grooves have a spring-loaded throttling rod with a piston. Outer surfaces of said piston interacts with the inner surfaces of the boss stepped grooves. There is a channel connecting the inlet cavity of the valve with the above-piston cavity of the throttling rod with a piston on the side of the inlet valve.
EFFECT: invention is designed to simplify the valve design and reduce its weight due to the use of the working medium pressure to drive the valve without sending an electric control command to the valve drive.
5 cl, 3 dwg
FIELD: valves production.
SUBSTANCE: present invention is intended for transportation of gases via main gas lines. Valve emergency shutoff automatic device comprises two control chambers that are connected with the gas line and communicate via calibration orifices. Outlet chamber that is connected with the hydraulic drive of the gas line shutoff device is divided by a bursting disc into two cavities. There are ballast and emergency tanks connected to the gas line via check valves. Moving rod with a conical head is located near the disc. Control chambers are separated by the first bellows arranged coaxially inside the cylindrical casing and its rigidly fixed lower cover. Upper free end of the bellows is tightly closed by a plate with calibration orifices and a central rod fixed on it; this rod has a possibility of axial movement in case of longitudinal deformation of the bellows. Central part of the rod is fixed on the plate tightly closing the lower free end of the second bellows that is rigidly fixed on the partition with a central orifice installed in the housing. Average diameters of the first D1 and the second D2 bellows are not equal. Total section area of the calibration orifices is calculated using an algebraic relation.
EFFECT: invention is designed to improve the operating reliability of the machine and extend its longevity.
1 cl, 2 tbl, 2 dwg
SUBSTANCE: machine contains a crane control system that includes a pneumatic actuator, a pressure gauge and a pneumatic cylinder housed in the body with a sensing element, a gas bypass element and a throttle assembly. The pneumatic cylinder is made in the form of a piston with an annular groove and is divided into two working cavities. One cavity of the pneumatic cylinder is connected with the gas pipeline, and the second - with the pressure comparison cavity formed inside the monolithic metal case into which the air cylinder is placed. The gas bypass element is made in the form of a single central through-hole of the piston in which a throttle assembly is mounted in the hub on the side of the cavity communicating with the gas line. The latter is executed in the form of successively coaxially installed two chokes, one of which is made in the form of a constant-section choke and faces the outer end of the piston, and the second is a slotted conical choke.
EFFECT: increase of reliability due to exclusion of false alarm of the device with simplification of design and reduction of overall dimensions and weight.
5 cl, 4 dwg
FIELD: machine engineering.
SUBSTANCE: hydromechanical device for smooth loading of the hydraulic system contains a housing, a spring, is equipped with a piston, branch pipe and rubber rings. The piston is installed in the housing, to which the spring is attached. The seal of the piston in the body is provided with rubber rings. Under the water pressure in the network and the spring pressure, the piston moves in the housing to open and close the water flow and relieve excessive water pressure in the network.
EFFECT: increasing the efficiency of the hydromechanical device for smooth loading of the hydraulic system, by absorbing the water hammer and discharging water at elevated pressure.
SUBSTANCE: safety valve comprises a housing with inlet and outlet nozzles, a bellows sealed to housing and movable member, a locking mechanism comprising a spring loaded separator with cylindrical retainers. Fixing mechanism is provided with an additional spring 10, disposed in internal cavity of movable member 11 in the form of a cup, interacting with cylindrical locks 8, and support 14 with a rod 15 provided with a head 16, connected to the sealing assembly, consisting of a slide valve 5 having an internal groove, and a sealing seat 6 on the outlet nozzle 3. The head has 16 rod 15 in the groove of slide valve 5.
EFFECT: expansion of operational capabilities of safety valve and increasing the reliability of its operation during exploitation due to the imperviousness of shutter after multiple responses.
6 cl, 2 dwg
FIELD: hydraulic and pneumatic automatics, namely regulation of pressure of natural gas at outlet of gas distributing stations.
SUBSTANCE: regulator includes outer cylindrical housing, swirling chamber coaxial to said housing, designed for energy separation and having annular duct for drawing off hot flow and unit for controlling cross section of tangential nozzle inlet of compressed air in chamber. Said unit is arranged between diaphragm and swirling chamber. Recovering swirl ejector is arranged directly behind diaphragm in cold end part of chamber. Controlling unit, namely valve unit is in the form of hollow cylinder moved in lengthwise direction by means of rod of servo drive. At side of diaphragm cylinder engages with outlet cross section of nozzle inlet through lengthwise tangential ducts in wall of inlet collector embracing outer wall of said valve. Outlet of duct for drawing off hot flow to side of cold end of chamber and to side of housing of nozzle inlet is connected with collector for supplying hot flow to ejector. The last is in the form of tangential ducts in lateral wall of duct for drawing off cold flow. Behind mixing passage of ejector and lateral branch of mixed flow said servo drive of regulator is arranged.
EFFECT: enhanced operational reliability, enlarged functional possibilities of one-aggregate gas pressure regulator, improved accuracy of regulation due to effective self-heating and dynamic balance of shut-off pair.
3 cl, 3 dwg
FIELD: hydraulic and pneumatic engineering.
SUBSTANCE: device has body with coaxially placed two serially opened locking organs. Coaxially to body guiding cylinder perforated with through apertures is fixed to first locking organ, placed with possible displacement relatively to guiding cylinder and interaction with saddle and stationary support. Second locking organ is made in form of decreased cope of the first one, provided with guiding cylinder, fixed to analogical cylinder of first locking organ on the side of flow output. First locking organ is made in form of hollow barrel moved along outer surface of guiding cylinder with unloading apertures in its bottom. Hollow barrel I loaded with back action spring. The latter is placed between its bottom and body. Second locking organ is loaded with back action spring, placed between its bottom and bottom of first locking organ. Saddle for first locking organ is placed on the side of flow output. Bottom of second locking organ is placed on the side of flow output. Bottom of first locking organ is connected to servo through rod. On each saddle of guiding cylinders of locking organs on the side of flow outputs protective element is placed. Protective element is in contact with front edge of barrel and is made in form of for example moveable ring spring-loaded relatively to saddle. This ring envelopes saddle and covers stationary compaction of locking couple in its open position on the side of the flow. Ring is provided with unloading apertures and limiter of movement in form of for example removable brackets. Brackets are evenly placed along circle in amount no less than three and fixed at the end of saddle. Servo is made in form of pneumatic cylinder adjuster coaxial to the body. Said cylinder is mounted outside gas flow and contains moving piston. Piston separates hollows of controlling and output pressures. In hollow of said pressure said rod connected to piston is placed. On the opposite side piston is supported by pusher. Pusher is mounted coaxially with its possible contact to sensor of position of locking organs ad coaxial to pusher of limiter of their movement, moved manually or automatically.
EFFECT: higher durability, broader functional capabilities.
FIELD: gas industry.
SUBSTANCE: device has controlling electromagnetic valve with inlet saddle, connected to gas-feeding channel, adjusting organ, driven by electric magnet, and outlet saddle, low pressure hollow with branch channel and separated from it by fixed saddle and cutting latch high pressure hollow, cylindrical chamber with moving element, interacting through pusher with cutting latch and forming in chamber on the side of pusher a working hollow, connected to controlling valve hollow, and on the opposite side an auxiliary hollow connected to atmosphere with mechanical spring positioned on it and adjusting element for given low pressure. Outlet saddle of controlling valve is connected via channel to low pressure hollow. Pusher is made in end, which kinematically interacts with cutting latch of moving saddle, connected by auxiliary hollow through aperture in moving element and pusher.
EFFECT: higher efficiency.
2 cl, 2 dwg
SUBSTANCE: device has outer cylindrical body, vortex chamber coaxial to the latter for energy separation with circular channel for intake of hot flow and assembly for adjusting cross-section of tangential nozzle intake of compressed gas into chamber, positioned between diaphragm and chamber, and also utilizing ejector, while adjusting assembly, valve in particular, is made in form of diaphragm body moved in longitudinal fashion by servo rod, and interacting with outlet cross-section of nozzle intake via longitudinal tangential channels on the wall of cold end of vortex chamber, enveloping outer wall of valve, while channel for intake of hot flow to cold end of chamber by its outlet is connected to inlet of hot flow into ejector, while outer cylindrical body with side inlet of compressed gas and shut on the side of outlet of servo rod and hot end of vortex chamber has a spin diffuser directed along hot flow, with turbulence promoter, intermediate wall, held in flange groove of outer body, and also - outlet extending wall in such a way, that in ring-shaped area, forming an inlet collector across from side inlet of compressed gas, coaxially to outer body ejector pipes rigidly connected to walls are positioned with nozzles for outlet of hot flow in parallel to output of cold flow from diaphragm. Rod, mounted strictly along axis of vortex chamber, on the side of output of cold flow by ball support is connected to intersection of body of diaphragm and valve.
EFFECT: higher reliability, higher durability, higher efficiency.
4 cl, 1 dwg