Locking device for emergency shutoff of the pipeline
The invention relates to a valve and is designed to prevent losses of the working medium in the pipeline break. Locking device for emergency shutoff of the pipeline includes a housing, an input choke filter, the output fitting and the bolt. The shutter is made in the form of a spring-loaded diaphragm valve, provided with an axial hole, and a sealing element located at the end of the output fitting. The output nozzle is adjacent to the valve, provided with a spring and is arranged to move in the axial direction. The invention is directed to improving the reliability of the overlap of the pipeline when it is broken. 5 C.p. f-crystals, 1 Il. The invention relates to a device for preventing loss of the working environment at break of the pipeline and reduce fire hazard due to possible leakage of the combustible fluid through the rupture of the pipeline.A device for protection of the pipeline from losses at the end of a pipeline, comprising a housing with inlet and outlet fittings and movable hollow piston located lower part of the housing bore and is connected to the inlet, and in the upper part of the side surface of the openings is it part of the piston and the annular ledge above it, the hole in the casing and attached to the body of the ring, covering the piston (see RF patent 2064098 C1, 20.07.1996).The disadvantage of this device is the lack of reliability of the overlap of the pipeline because the pipeline overlap is due to the hydrodynamic movement of the piston.Known locking devices for emergency shutoff of the pipeline closest to the essential features is the shut-off device comprising a housing, inlet fitting with filter, the output fitting and the bolt with an aerodynamic valve and the sealing element (see RF patent 2096146 C1, 20.11.1997).The disadvantage of this locking device is the lack of reliability of the overlap of the pipeline when the gap due to the use of aerodynamic paddles with rubber ball sealing element, which works due to the lifting force and requires vertical positioning of the device. In case of deviation from the vertical position value of the lifting force is reduced, and the reliability of the overlap of the pipeline is reduced.The objective of the invention is to provide a locking device having high reliability overlap of the pipeline.The decree of the filter, the output fitting and bolt, including the valve and the sealing element. The valve is made in the form of spring-loaded diaphragm valve, provided with axial and radial openings, and a sealing element located at the output end of the fitting adjacent to the valve. The execution of the shutter in the form of a spring-loaded diaphragm valve, provided with an axial hole, and a sealing element located at the output end of the fitting adjacent to the valve, provides a secure pipe is closed due to the pressure drop that occurs on the membrane at break of the pipeline.It is advisable that the output nozzle was equipped with a spring and was made with the possibility of moving in the axial direction. This embodiment of the output fitting ensures a reliable seal when the rupture and the possibility of multiple valve opening after the removal of the accident.It is advisable that the axial hole in the valve was performed stepwise, and the ratio of hole diameter from the inlet fitting to the diameter of the hole from the side of the sealing element ranged from 0.1 to 0.5. The presence of stepped holes with the specified ratio creates the need for C is user was equipped with a handle, posted on rails, to ensure its axial movement. The presence of arms, placed on the rails, allows for repeated opening of the valve after removing the accident.It is advisable that the output nozzle was supplied with o-ring seal made of elastic material. Have the seals allows for axial movement of the fitting, ensuring tightness.It is advisable that the valve was provided with annular stop limiting the axial travel of the valve, and the magnitude of the axial movement of the valve was less than the value of the axial movement of the output fitting. The presence of the stop and the ratio of the axial movements of the valve and the output valve provides a guaranteed opening of the valve by the handle after removing the accident.It is advisable to inlet port was equipped with a coupling nut for attachment to a container of flammable liquid.It is advisable that the sealing element is made of elastic material such as rubber, Teflon, etc.,The analysis of the prior art showed that the claimed set of essential features set forth in the claims, is unknown. This allows you to make "inventive step" conducted an additional search of known technical solutions in order to identify signs, match the distinctive features of the prototype of the characteristics of the claimed technical solution. Found that the claimed technical solution is not obvious from the prior art. Therefore, the claimed invention meets the criterion of "inventive step".The invention is illustrated in the drawing and a description of the operation of the claimed device.The drawing shows an axial slit declared locking device.The locking device includes a housing 9 to the inlet 1, with locking nut 2 and the outlet fitting 12 with a handle 11. In the cavity of the housing 9 are the filter 3, the membrane 4 with a valve 5 and a spring 6, the sealing element 7 is placed on the output end of the fitting 12. The output socket is provided with a spring 8, and the sealing ring 10, and the guide 13. The locking device 5 provided with a stepped bore 14, 15 and annular stop 16.The device operates as follows. During normal operation, the valve 5 is opened by matching the force of the spring 6 and the differential pressure in the cavities a and B. the Liquid through the fitting 12 is supplied to consumers. With a sharp increase in consumption, which corresponds to the rupture of the consumer, the small hole 15 no time of propylene between cameras a and B. The specified differential overcomes the force of the spring 6, the locking device 5 is moved and reaches the sealing element 7, providing an overlap of the output channel. When breakdown fitting 12 of the handle 11 is discharged in the axial direction and held to equalize the pressures in chambers a and B. Under the action of the force of the spring 6 valve moves to the left and opens a channel for passage of liquid. After releasing the handle 11, the valve remains open.Based on the above we can conclude that the stated closing device can be implemented with the achievement of the claimed technical result, i.e., it meets the criterion of "industrial applicability".
Claims1. Locking device for emergency shutoff of the pipeline, comprising a housing, inlet fitting with filter, the output fitting and bolt, including the valve and the sealing element, wherein the shutter is made in the form of a spring-loaded diaphragm valve, provided with an axial hole, and a sealing element located at the output end of the fitting adjacent to the valve, whereby the output socket is provided with a spring and moved possibility is being stepped, the ratio of hole diameter from the inlet fitting to the diameter of the hole from the side of the sealing element is from 0.1 to 0.2.3. The locking device according to p. 1, characterized in that the output of the adapter is provided with a handle placed on the guides.4. The locking device according to p. 1, characterized in that the output of the adapter is provided with a ring seal made of elastic material.5. The locking device according to p. 1, characterized in that the valve is provided with an annular stop limiting the axial travel of the valve.6. The locking device according to p. 5, characterized in that the axial movement of the valve is less than the amount of the axial movement of the output fitting.
FIELD: oil producing industry.
SUBSTANCE: invention relates to pipe fittings, namely, to devices with rotary shutoff member and it can be used for automatic closing of high-pressure pipes at emergency pressure rise or drop in wells of oil and condensate fields. Proposed cutoff device contains housing and rotary shutoff member installed in housing. Said member is made in form of two rotary gates, one placed on the other. One of gates is provided with discharge hole, and other gate is blind. It covers hole is discharge gate. Device is furnished with lock holding shutoff member in open position, and sensitive element. The latter is made in form of spring-loaded rod connected with lock. Lock holds discharge rotary gate with hole in open position. Blind rotary gate is provided with stop being installed for engagement with sensitive element rod through stop.
EFFECT: simplified design of cutoff device, provision of reliable operation at pressure drop or rise and overlapping of high-pressure pipeline.
FIELD: pipeline fittings, particularly shutoff devices with blocking members sliding long seat surface between inlet and outlet channels and with rotary blocking member, used for gas flow regulation and emergency pipeline closing in the case of pressure increase/decrease.
SUBSTANCE: locking and regulating device comprises housing with through channel, seat, flat gate with sealing surfaces and orifices connected with drive by rod, rotary blocking member made as flap arranged on the flat gate and connected to fixing mechanism. The device is also provided with sensing member. The sensing member is arranged on the body in parallel to drive and is made as spring-loaded rod with extension made on rod end. Fixing mechanism is created as two rests. One rest is installed on the flap and extends transversely to it. Groove is made in rod extension transversal to through channel. Short arm of another rest connected to the rod is arranged in the groove, wherein above rest is rotary supported by pin. Long arm of above rest is installed so that it may cooperate with rest installed on the flap within the range of flat gate displacement.
EFFECT: simplified structure and increased operational reliability due to provision of rigid kinematical connection between sensing member rod and rest.
FIELD: general engineering.
SUBSTANCE: invention relates to safety valves and fittings for pipelines and it is designed for cutting off working medium in different pipelines at higher flow rates and low pressures in case of rise of pressure of liquid or gaseous medium in pipelines over tolerable values and in can be used in process lines of thermoelectric plants, nuclear power plants and gas and oil processing enterprises. Proposed safety unit contains housing with inlet and outlet branch pipes and direct-acting safety valve. The latter is arranged in housing and is provided with seat with through hole for engaging with locking member. Locking member is spring-loaded relative to housing and is installed for closing through hole in case of pressure drop of working medium. Locking member is furnished with screen enclosing the seat. Restrictor is arranged on inlet branch pipe. Restrictors of different design versions are provided. According restrictors of different design versions are provided. According to first design version, restrictor is made in form of spring-loaded piston installed on inlet branch pipe for changing area of ring hole between piston and screen when opening and closing the valve. According to second design versions, restrictor is made in form of disk of elastic flexible material for changing are of ring hole between piston and screen when opening and closing the valve. According to third design version, restrictor is made in form of spring-loaded disk of elastic flexible material installed on inlet branch pipe for movement and changing area of ring hole between piston and screen when opening and closing the valve.
EFFECT: prevention of influence of working medium forces in outlet channel of safety valve members at final stage of valve closing.
4 cl, 6 dwg
SUBSTANCE: cut-off valve comprises two housings with interconnected spaces. The first housing receives seat and gate movably mounted on the seat, and the second housing receives a mechanism for rotating and lifting the gate. The mechanism has movable bushing provided with the axle. One end of the lever is connected with the gate. The locator of position of the gate is made of electromagnet whose core is interposed between the lever and bushing. The core and bushing are made for permitting them to be connected when the gate is at the bottom position and to be disconnected when the gate is at the top position. The bushing is provided with the tip having split spring ring that is set in the ring groove provided in the tip, and core has the space for receiving the tip and groove with L-shaped cross-section for receiving the spring ring of the tip. The cut-off valve is additionally provided with the control unit and block for control of position of the gate. The control unit and the block for control of the position of the gate comprises light diodes, sealed-contact reed relays, and relay. The sealed-contact reed relays are mounted for permitting them to be controlled by electromagnetic field of the coil. The block for control of gate position has additional axles parallel to the axle of the mechanism for rotation and lifting and connected with it by means of a gear transmission and nut with the permanent magnet that can move with respect to the additional axle. The sealed-contact reed relay, light diodes, and control unit are connected with the power source through the relay and outputs for connection of transducers. From the side of the outlet, the housing of the mechanism for rotating and lifting is provided with lid having projecting outer part, and the axis of the control unit and block for control of the position of the gate passes through projecting part of the lid. The core and tip are provided with passages for leveling pressure.
EFFECT: enhanced reliability.
SUBSTANCE: shutoff valving device comprises actuating mechanism made of housing with movable valve and movable bushing with seat, hydraulic pump, hydraulic tank, and solenoid valve. The bushing is made of a piston. The piston is positioned in the intermediate section and separates the space of the housing into control chamber and chamber connected with the atmosphere. The device has pressure transformer, safety device, and manually operated cock. The pressure transformer is made of a housing separated into top and bottom chambers with a baffle and coaxially mounted movable differential piston with axial passage. The passage connects the above-piston space of the top chamber with the bottom chamber. The valve cooperating with the seat is mounted at the face of the differential piston. The seat is mounted at the inlet. The cross-section of the top face of the differential piston is greater than that of the valve. The safety device is composed of the housing and seat, valve, and adjusting screw with spring mounted inside the housing. The control chamber of the actuating mechanism is connected with the outlet of the hydraulic pump and inlet of the pressure transformer through the pressure line. The outlet of the pressure transformer is connected with the inlets of the solenoid valve and safety device. The outlets of the electromagnetic valve and the safety device and above-piston space of the top chamber of the pressure transformer are in communication with the hydraulic tank through the drain pipeline. The manually operated cock is interposed between the pressure and drain pipelines.
EFFECT: enhanced reliability.
FIELD: valving systems.
SUBSTANCE: valving device comprises housing, rotatable valving member mounted inside the housing, locking member that keeps the valving member opened, and sensitive member. The valving member is made of rotatable gate provided with sealing surface and opening. The sensitive member is made of a spring-loaded rod connected with the locking member. The opening of the rotatable gate receives the spring-loaded valving member provided with sealing surface in the open position. From the side opposite to the sealing surface, the rotatable gate is provided with the seat for permitting cooperation with the sealing surface of the valving member when it is closed.
EFFECT: simplified structure and enhanced reliability.
FIELD: mechanical hydraulics, possible use for controlling pressure in hydraulic systems.
SUBSTANCE: two-stepped pressure valve contains plunger, which is made two-stepped with creation of circular shelf on it, area of which is less than the area of piston, and external surface of additionally made step forms an alternating cross-section circular channel with body clamp surface, which cross-section increases from the side of shelf.
EFFECT: stable pressure at inlet independently from value of flow through the valve, expanded spectrum of flow channeled by the valve.
FIELD: valving systems.
SUBSTANCE: control valve comprises housing with inlet and outlet openings and valving member connected with the rod and is made of a spiral flexible member. The spiral member is made of a tension spring made of a shaped article whose surface is made of a Z-shaped sealing surface. The spiral member is mounted for permitting axial movement inside the axial opening in the seat-bushing. The seat-bushing is perforated with at least one shaped opening and is provided with sealing coating mounted on the sealing surfaces that are in a contact with the spiral member and housing. The spiral member is provided with sealing coating applied on the sealing surfaces of the turns of the spiral member. The seat-bushing and spiral member are made of a corrosion protection material.
EFFECT: simplified design and expanded functional capabilities.
FIELD: valving systems.
SUBSTANCE: valving device comprises rotating member made of a gate. The gate is locked in the open position by means of a sensor made of a spring-loaded rod. The device is additionally provided with the switch for switching the ranges of operation of the sensor. The rod of the switch is connected with the sensor by means of a lever for permitting vertical movement and is locked by the locking member depending on the adjusting values of pressure.
EFFECT: improved design and expanded functional capabilities.
FIELD: mechanical engineering.
SUBSTANCE: invention relates to safety valves and it is designed for preventing destruction of working reservoirs under action of excess gauge pressure. Proposed safety valve has housing with intake and outlet holes, spring-loaded cup, breakable element made of easily melting material and heating element. Valve is provided with insert with ring groove. Said insert engages with rod. Breakable element is installed between insert and bottom of spring-loaded cup. Heating element is located around breakable element on outer surface of housing and is connected to supply source through thermal relay. Holes are made in base of insert. Second end of spring interacts with ball through seal. Said ball closes inlet hole.
EFFECT: improved reliability of operation of safety valve, provision of safety at operation with aggressive gases in emergency situations.