FIELD: machine building.
SUBSTANCE: invention relates to piping valves and is intended to control the working fluid medium in HP main pipelines at high working medium flow rates with abrasive inclusions. Valve includes body with flanges forming inlet and outlet valve openings and seats with conical sealing surface. In the housing there installed are segments with eccentricity relative to sealing planes and axis of sealing surface of seats. Turning drive provides the covering of seats with segments in closed position or full opening of valve throat in open position. Valve is equipped with bypass line. The latter includes the shutoff device of normally open action, which is located at the outlet of inner valve cavity, two non-return valves providing the connection of shutoff device to inlet or outlet opening of the valve depending on the working medium flow direction. Each seat consists of spring-loaded floating piston with restricted axial movement and housing of seat with conical surface. Piston is provided with radial seals and sealing surface with possibility of its additional one-sided compression against working medium pressure difference. Housing of seat has conical surface being the support surface for spherical surface of the segment when the valve is in closed position.
EFFECT: invention is aimed at enlarging functional capabilities of the design of shutoff valve with double-sided direction of working medium flow, with reduced mass and dimensions parameters and using the drives with low torque moment.
The invention relates to valves and is designed to control the flow of working medium in pipelines of a high pressure high flow of working medium, containing minor impurities with abrasive inclusions, as shut-off valve on high-pressure pipelines for large expenses operating environment.
Known construction single seat segment rotary valve (Bragin B.F. "valves for abrasive slurries". Mashinostroenie, Moscow, 1981, figure 22, 25), comprising a housing with inlet and outlet openings, a conical valve seat and a closing element made in the form of a segment of a spherical sealing surface.
The disadvantage of these valves is constant contact between the sealing surfaces during their relative displacement, which is associated with a strong wear at the ingress of abrasive particles between the friction surfaces.
This circumstance complicates the use of these valves on pipelines, where the working medium is oil or gas containing minor impurities with abrasive inclusions.
Known valves segment valve MAXEFLUSS presented in the company's catalog LLC Samson control", 2003, This shut-off and control segment is hydrated valve, having a triple eccentricity of the axes by rotating the segment significantly increases the torque on the drive, which increases the weight and size characteristics of both the actuator and valve in General. The disadvantage of this valve is the inability to use it on trunk pipelines with abrasive inclusions as shut-off valve because of its one-way seal.
Known design single seat swivel segment valve, comprising a housing with an inlet and outlet arranged on the same axis, the valve seat with a conical sealing surface located at the inlet, the locking element made in the form of a segment with the sealing surface, installed in a housing with an eccentricity relative to the plane of the seal and the axis of the sealing face of the seat which, in the closed position, the tight fit of the sealing surface to the cone seat and the rotary actuator (see Appendix 2, F 5000R 01/2004, Masoneilan company).
This shutoff valve is particularly effective when used in environments containing abrasive particles.
However, the downside of it is that the presence of the eccentricity of the axes of rotation of segment significantly increases the torque on the drive, which increases weight and Hara the indices as drive, and valve in General. The disadvantage of this valve is the inability to use it on trunk pipelines with abrasive inclusions as shut-off valve because of its one-way seal, and moreover it cannot be used in pipelines with saturated pneumohydrodrive working mixtures due to the fact that it is impossible to decontaminate the interior of the valve before the final closure to protect the sealing surfaces from wear and to ensure the tightness of the valve.
The closest technical solution, taken as a prototype, is a valve design for RF patent No. 2319879, (publ. bull No. 8 dated 20.03.2008,, F16K 1/22, F16K 5/06). This valve two-way direction of flow of the working fluid has a housing with flanges forming inlet and outlet openings of the valve, located on the same axis, the saddle with a conical sealing surface, installed in a housing with an eccentricity relative to the planes of the seal and the axis of the sealing surface of the seat, and a rotary actuator that provides overlap of the valve seat in the closed position or the fully open orifice valve in the open position.
This valve design used on pipelines at high cost operating environment containing NESN is significant admixture with abrasive inclusions, has a major drawback, namely when working with high pressure working environment at the end of the closing valve and opening the drive's torque increases rapidly and the effect on the reduction of the torque using the synchronous operation of the two segments is minimized. In the closed position of the valve, the entire load from the differential pressure falls across the saddle on the flange of the outlet. Therefore, the use of soft seals in the saddle, which absorb all the force at high pressure environment limits the functionality of the valve.
Object of the invention is to enhance the functionality of the shut-off valve with reduced overall dimensions for use on pipelines of high pressure high flow working environment using actuators with low torque.
The technical result is achieved due to the fact that valve, comprising a housing with flanges forming inlet and outlet openings of the valve, located on the same axis, the saddle with a conical sealing surface, segments, mounted in the housing with an eccentricity relative to the planes of the seal and the axis of the sealing surface of the seat, and a rotary drive providing closure of the valve seat in the closed position, the floor or the second opening of the bore of the valve in the open position, in addition, the valve provided in the bypass line containing a locking device normally open action, located at the outlet of the inner cavity of the valve, two check valves that connect the locking device with the inlet or outlet of the valve depending on the flow direction of the working environment, with each seat consists of a spring-loaded floating piston with a limited axial movement, performed with the radial seals and sealing surface with the possibility of additional one-way preload it from the differential pressure of the working medium, and a support seat with a tapered surface, which is the reference spherical surface segment in the closed position of the valve.
1 shows a longitudinal section of the valve in figure 2, node a in figure 1, figure 3 - cross section b-B in Fig. 1.
The valve includes a housing 1 with flanges 2, 3 input 4 and output 5 holes that are located on the same axis. The housing 1 has a saddle 6 and 7, the segments 8 and 9, mounted in the housing with an eccentricity relative to the planes of the seal and the axis of the sealing surface of the seat, the axis 10, 11 and 12, 13 segments, the actuator 14. Axis 11 and 13 kinematically connected to each other by a hinge mechanism of a parallelogram consisting of the levers 15, 17 and rod 16 (see figure 3). The saddle (see figure 2) consists of a piston 18, realnyhiphoptunes 19, ring 20, a spring 21 and the seat 22, is rigidly mounted in the flange of 2.3. The internal cavity of the housing 1 through the fitting 23 is connected with a locking device normally open steps 24 and through the pipeline bypass line of the latter is connected with non-return valves 25, 26 with the cavities of the holes 4, 5 through the fitting 27, 28 respectively. The fit surfaces of the segments 8, 9 to the supporting surface B of the housing seat 22 is provided by adjustment of the joints 29, 30, respectively.
The valve operates as follows.
In the open position of the valve the flow of the working fluid passes through inlet and outlet openings 4, 5.
The sealing surfaces of the segments 8, 9 are protected from high velocity flow and are in the area of the minimum velocity that protects them from mechanical damage and erosive wear.
At the bypass line shut-off device 24 is in the open position. Working environment the pressure drop through the fitting 27, closes the check valve 25 and opens the check valve 26, connecting the internal cavity of the valve through the nozzle 28 with a hole 5.
The piston 18 (see figure 2) on both the seat under the pressure of the springs 21 and the ring 20 moves and selects a constructive gap Z, while the sealing surface of the piston 18 is relative to the reference surface B of the housing behold the La 22.
When closing the valve (for example, when the fluid flow is directed from hole 4 to hole 5) actuator 31 rotates the pivotal axis 13 of segment 9 with the axle 12. The axis 13 through the system of levers 15, 17 and rod 16 at the same time turning axis 11 with segment 8 and the axle 10. The rotation of the segment ends with the landing of the spherical surfaces on the bearing surface B of the housing seat 22. With the passage of the spherical surfaces of the segments 8, 9 in contact with the sealing surfaces of the pistons 18 of the last moves on the magnitude of the gap Z, compressing the spring 21.
After closing the shutter the command to close the shut-off device 24. The pressure in the inner cavity of the valve is the same as in the input hole 4, since the input pressure working environment overcomes the piston 18 of the flange 3 and the pressure is equalized. From the internal cavity of the valve excess pressure penetrates through the gaps in the cavity under the piston 18 of the flange 2 and creates an additional force pressing the sealing surface of the piston 18 to the spherical surface segment 9.
At low pressures of the working environment tightness in the bolt preload is provided by only the force of the springs 21.
For the valve opening command to open the shut-off device 24. The pressure drop of the working environment check valve 26 bypass line is opened, and on the pressure in the inner cavity of the valve is quickly dumped and is aligned with the cavity, located at the openings 5. The segment 9 is completely unloaded from the force generated by the pressure differential. At the same time on segment 8 operates the differential pressure, which creates a moment, turning it in the direction of opening, and thus, significantly reduces the load on the rotary actuator. Drive somatropina. Due to this effect is the opening with very low torque. When opening the main force preload segment 9 is reset, so the latter is in unloaded condition slips its spherical surface on the sealing surface of the piston 18 and out of engagement.
When changing the direction of movement of the working environment, what happens in emergency situations the main pipeline gas, oil and water systems, the working medium pressure check valve 26 is closed, and when open the locking device 24 is normally open action opens the check valve 25. Through the fitting 27 the internal cavity of the valve connects with the hole 4.
In the closed position the sealing valve is provided with sealing surfaces of segment 8 and the piston 18 of the saddle 6 and the piston 18 of the saddle 7 is pressed by a pressure drop, the pressure in the inner cavity almost compared with the pressure at the orifice 5.
When technological tying mages the Central pipeline may be necessary in the two-piece valve one-way flow direction of the working environment. The valve can be simplified by connecting the internal cavity of the valve in the bypass line with the outlet valve, equipping it only by a locking device, a normally open actions
Experienced manufacturer of the proposed design has proven its effectiveness and fully affirmed its aerodynamic calculation.
The proposed shutoff valve in contrast to existing structures will significantly reduce the torque on the drive and provide two-way sealing shutter with reduced weight and size characteristics, as well as to improve the durability and tightness of the sealing surfaces, increasing the service life of the valve when it is used on pipelines of high pressure high flow of the working medium, i.e., can replace ball valves are installed on pipelines with high pressure environment.
Valve, comprising a housing with flanges forming inlet and outlet openings of the valve, located on the same axis, the saddle with a conical sealing surface, segments, mounted in the housing with an eccentricity relative to the planes of the seal and the axis of the sealing surface of the seat, and a rotary drive providing closure of the valve seat in the closed position or full opening bore CL the pan in the open position, characterized in that the valve provided in the bypass line containing a locking device normally open action, located at the outlet of the inner cavity of the valve, two check valves that connect the locking device with the inlet or outlet of the valve depending on the flow direction of the working environment, with each seat consists of a spring-loaded floating piston with a limited axial movement, performed with the radial seals and sealing surface with the possibility of additional one-way tucked up her from the differential pressure of the working medium, and a support seat with a tapered surface, which is the reference spherical surface segment in the closed position of the valve.
FIELD: machine building.
SUBSTANCE: ball valve includes housing consisting of lower nipple part and upper coupling part, which are connected to each other by means of cylindrical thread. Ball with a central hole is installed in the bore of lower nipple part of housing with possibility of rotation. Spindle in the form of stepped bushing is arranged coaxially to ball in lower nipple part of housing with possibility of rotation. Longitudinal slot is made on side surface of ball on the spindle side symmetrically to diametral plane and perpendicular to central hole of the ball. Projection is made on inner edge of spindle and interacts with the above longitudinal slot. Upper and lower seats interact with the ball. Elastic deformable element pressing the seats to the ball in the form of a ring from elastomer is installed in the bore of the housing. Ball turning limit stop is fixed in the wall of lower nipple part of housing coaxially to the ball. The above limit stop is made in the form of a ring with projection on external surface, the lateral edges of which are mutually perpendicular. Symmetry axis of its lateral edges is located at an angle of 45° to longitudinal axis of housing and directed downwards. Spindle is arranged in the bore of ball turning limit stop. Recess is made on side surface of the ball on the spindle side above longitudinal slot. Lateral edges of the recess are parallel and axisymmetrical to longitudinal slot of the ball, and when the ball is turned through 90°, they interact with lateral edges of ball turning limit stop.
EFFECT: improving operating reliability and safety of the ball; enlarging its operating capabilities.
FIELD: machine building.
SUBSTANCE: valve with filter includes body 1 with ball gate valve 6, inlet 2 and outlet 3 coupling branch pipes located on one axis on opposite sides, filtration chamber 5 located radially relative to axis of inlet 2 and outlet 3 branch pipes, plug 9 and filtering element 10 in the form of a bushing. Clear gap of cavity of body 1 between inlet 2 and outlet 3 coupling branch pipes is shut-off with dividing cross connection 11. Filtration chamber 5 has annular centring element 13 adjacent to one of end parts 12 of filtering element 10 and passing along dividing cross connection 11 and part of body in the zone of inlet 2 branch pipe, in the centre of which inlet hole 14 is located. Plug 9 is fixed in filtration chamber 5 and provided with annular centring element 15 that is adjacent to the second end part 16 of filtering element 10. Annular centring elements 13, 15 and filtering element 10 are located on one and the same axis crossing the location axis of inlet 2 and outlet 3 branch pipes at right angle. Ball gate valve 6 is provided with guide opening 18 and installed in body 1 between dividing cross connection 11 and inlet 2 branch pipe with possibility of being turned manually through right angle. Inner side walls 23 of filtration chamber 5 are located at some distance from external surface 24 of filtering element 10 for formation of annular cavity 25 located around filtering element 10 and interconnected with cavity 26 of outlet coupling branch pipe 3 by means of discharge channel 27. Side surfaces of discharge channel 27 are located at sharp angle to axis of inlet 2 and outlet 3 branch pipes, the vertex of which faces the direction from inlet 2 branch pipe to outlet 3 branch pipe.
EFFECT: enlarging the number of means of shutoff and water purifying valves for pipelines, which provide high purification degree in compliance with the parameters specified with filtering element owing to reducing the probable penetration of filtered particles through filtering element.
7 cl, 2 dwg
FIELD: machine building.
SUBSTANCE: body of a valve from synthetic material comprises a bearing structure. The bearing structure comprises a ball of a valve with a through hole, two support rings arranged oppositely to each other and one connecting element that connects the specified support rings. The bearing structure fully separates the valve ball from the synthetic material of the casing. The specified bearing structure is enclosed into a shell from the synthetic material of the specified casing, formed during casting of this casing, and comprises fixing supports made in the specified connecting element having the cylindrical shape. Support rings are arranged at the previously determined distance from each other to form a gap between a valve ball and support rings, which are fixed in the specified position. Areas of contact of support rings with a cylindrical connecting element are fused or adhered.
EFFECT: simplified manufacturing and improved tightness of a ball valve in a casing of synthetic material.
19 cl, 4 dwg
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
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.
FIELD: medicine, fire fighting equipment.
SUBSTANCE: valve for piping of fire extinguishing systems containing inlet device supplying with fire-extinguishing liquid under high pressure, outlet for fire-extinguishing liquid, located between the inlet and outlet shutoff valves and actuating devices for switching shutoff valves in open/closed position while at rest shutoff valves are in closed position and in case of fire an actuating devices switches shutoff valves from a closed position into an open position so that fire-extinguishing liquid from the inlet to the outlet. In order to maintain without loss of fire-extinguishing liquid it is suggested that there will be a possibility of switching into maintenance mode from closed position by means of actuating devices.
EFFECT: no leakage of fire extinguishing fluid from the inlet to the outlet in maintenance mode.
13 cl, 7 dwg
FIELD: machine building.
SUBSTANCE: invention relates to field of armature engineering and is provided for parametres regulation of flows of working mediums in equipment of gas, oil, chemical, energy, metallurgical and coal industry. Multipurpose valve contains casing with inlet and outlet fittings, drive, sphere rotary gate with passage opening and shutoff part, saddle of sphere rotary gate with thickening surfaces. In passage opening of sphere rotary gate there are located throttling elements. Eight equispaced by circumference of passage opening, throttling elements allows in section perpendicular to axis of passage opening shape of isoscales triangle with 90° vertex. Vertex is directed to axis of passage opening. Four of mentioned throttling elements are stationary. The other four are located between them with ability of displacement in the direction of axis of passage opening. Value of this displacement is equal to leg of triangle of immovable throttling element.
EFFECT: invention provides increasing of regulation reliability in abrasive-carrying flow of working medium ensured by de-turbulising operation of configuration of passage opening with ability of leak-free shutoff of valve independently of wear of throttling elements.
4 cl, 4 dwg
FIELD: machine building.
SUBSTANCE: valve can be used in the capacity of multipurpose member during pipeline transportation of gas, oil, water and other liquids and gaseous materials. In valve body nearby abutment lip it is implemented annular groove, connected by openings to inner cavity of valve. Valve seat is installed in cylindrical counterbore with restricted axial and radial clearances between abutment lip of casing and smooth cross-cut surface of reciprocal conjunctive flange. Seal face of seat matches to globular convex seal face of segment. Butt of seat is implemented as beveled. Self-sealings are installed at external surface of seat end, removed from abutment lip of casing, with sealing element at the butt, contacting to smooth face surface of abutment lip of body. Driving shaft is implemented end block with reduced cross-sectional area between mounting surfaces for installation of segment and is installed perpendicularly to central axis of valve and is shifted relative to valve axis. Into clearance between body and driving end of shaft it is installed sealing device, implemented with ability of continuous pressing to bearing sleeve. Into gap between casing and free end of shaft it is installed compaction, installed with ability of preload.
EFFECT: increasing of valve tightness at interlocking of flow, improvement of reliability, manufacturability and accuracy of manufacturing.
FIELD: machine building.
SUBSTANCE: invention is intended for use in pipeline systems of oil- and gas pipelines, water supply and multitude of other hydraulic units. Globe valve contains casing with one or two covers with channels for liquid passing, sphere valve with pass and controlling spindle, floating between two saddles from elements with high and low rigidity, located in covers and casing in joints of channels to gate. Rigid element of saddle is implemented in the form of ring from rigid and strong material with antifriction properties on surface of contact to gate and is installed without initial tightness by gate. Soft element of saddle is located on external surface of rigid element and is implemented in the form of flange collar. Blade of each collar allows tightness by sphere valve. Flange part of collar is located with diametral tightness in enveloping it housing or cover boring.
EFFECT: invention is directed to multiple increasing of permissible diametres of passes and pressure difference of liquid and also to increasing of work resource of globe valve with floating gate at simultaneous reduction of labour-intensiveness of manufacturing and moment on controlling spindle.
FIELD: construction industry.
SUBSTANCE: group of inventions refers to shutoff pipeline valves and is designed for reliable closing the flows of the working medium transported via a pipeline. Ball valve with full opening is arranged between two connection pipes the ends of which are tightened with a ball. The ball is equipped with a turning shaft for ball opening and closing. The ball and ends of connection pipes are enclosed with a body. The body is attached with its ends to the sides of connection pipes as the element attaching the valve parts. On the ends of connection pipes in a circumferential direction there formed is a protruding part. That part includes an annular seal. The body is connected to the sides of connection pipes so that the ball and stepped ends of connection pipes with their seals can be arranged inside the space formed with the body. Chamfers with reverse angle are made on end surfaces of the body, and an additional hole for the second shaft is made on one and the same axis with the shaft. The body is formed with spherical ends comprising a flat annular contact to external surfaces of connection pipes. When manufacturing such ball valve, chamfers with reverse angle and an additional hole on one and the same axis with the shaft are pre-made on ends surfaces of the body, and then the ball is fixed in the body with two shafts. Pressure shaping is performed on the body ends so that spherical shape of the body ends is formed in order to obtain a flat annular contact between the body ends and connection pipes.
EFFECT: group of inventions allows improving reliability and lifetime of ball valve.
5 cl, 6 dwg
FIELD: machine building.
SUBSTANCE: valve consists of case (2) with axial channel (3), of spherical rotary plug (6), of seat (15), of lug (31), of slots (55, 56) and of devices for equalising fluid medium between inlet and outlet sides of seat before valve opening. Plug (6) rotates in the case between closed and open positions and has through orifice (10). Seat (15) is positioned on the inlet side and has central pass (16). It is installed in the channel of the case before the plug and performs progressive travels along axis (3). The seat is compressed to the plug by means of elastic device (27). Lug (31) in seat (15) projects in the direction of the plug. First slot (55) in the plug interacts with the lug, when the plug is in a closed position. Second slot (56) in plug (6) interacts with lug (31), when plug (6) is in an opened position. First slot (55) is at a distance from second slot (56) at angle (α) equal from 70° to 80°.
EFFECT: reduced wear of valve, its increased pressure tightness at low and medium pressure and simplified operation.
10 cl, 7 dwg
FIELD: valving system.
SUBSTANCE: angular valve comprises housing with outlet branch pipes and conical space for the conical plug mounted in the bearing and provided with through passage. The face lid with inlet branch pipe is locked inside the housing. The control handle is mounted for permitting rotation in the transverse and longitudinal directions with respect to the housing and in the longitudinal direction with respect to the plug. The control handle is connected with the plug through the cam. The cam is provided with the arrester of its upward movement in the longitudinal direction. The plug is provided with the spindle that is pivotally connected with the cam and rigidly connected with the plug. The return spring is mounted in the space between the faces of the spindle and plug. When the control handle rotates downward in longitudinal direction, the space is connected with the through passage in the plug. When the control handle rotates in the opposite direction, the space is cutoff from the passage.
EFFECT: simplified structure.
5 cl, 5 dwg
FIELD: machine building.
SUBSTANCE: invention refers to oil and gas industry and can be used in main gas lines, underground gas storages, gas-distributing stations and other sites. Electrically-driven shutoff valve includes body with cover plate, worm gear drive consisting of worm shaft and worm gear wheel, electric drive, inlet and outlet flanges, movable gate and fixed seat with a seal. Position indicator of movable gate consists of housing-adapter, movable sleeve with internal thread, rotation locking device and scale on external surface, and position indicator of movable gate. Position indicator of movable gate is arranged on worm shaft. The latter is equipped at the location place of position indicator of movable gate with thread with the pitch providing the compliance of one turn of the worm shaft to one millimetre of movement of movable gate.
EFFECT: higher accuracy of determination of movable gate position in emergency situations.
FIELD: machine building.
SUBSTANCE: invention refers to sealing equipment and is designed for sealing devices of systems and units operating in wide range of temperatures and pressures, for example in the field of rocket-and-space equipment, and namely in detachable connections in the line of filling the carrier rocket with liquid oxygen, hydrogen and helium. Sealing connection with elastic edge includes stiff spherical shutoff member with bellows element, which is installed on elastic thin-wall seat with a retaining ring. Contact surface of elastic thin-wall seat is concave and has the curvature radius that is smaller than curvature radius of spherical sealing surface of stiff spherical shutoff member.
EFFECT: invention is aimed at simplification of the design, reduction of overall dimensions, weight and sealing force, improvement of manufacturability, improvement of sealing reliability at changing the operating conditions.
FIELD: oil and gas production.
SUBSTANCE: coke oven gas flows are controlled in coke oven discharge tube system 10. Said system 10 comprises tube unit for transfer of gases 14 from coke oven into main manifold 16 and flow control means. The latter comprise pass hole 22 in tube unit with shutoff element 20 fitted therein. Said element 20 may displace axially between open and closed positions; in the latter, said elements shuts off pass hole 22. Tube system 10 comprises orifice hole 28 arranged to provide for passage for gases 14 toward main manifold 16. Orifice hole 28 features smaller total cross-section area than pass hole 22.
EFFECT: improved flow control parameters.
14 cl, 14 dwg
FIELD: machine building.
SUBSTANCE: needle valve comprises body with inlet and drain channels. The latter are communicated via stepped channel. Valve body accommodates main and drain shutoff elements. Main shutoff element is arranged to interact with seat made up of stepped channel edge. Drain channel has branches. Outlet of every branch is shaped to taper stepped hole. Drain shutoff element is arranged, preferably, in bush. The latter is arranged in on of said holes and provided with seat. Other rearrangeable holes accommodate, mainly, the plugs and, preferably, pressure gage. Proposed method consists in jointing said valve to pressurised system, driving shutoff element from seat to make a gap to communicate the system with pressure gage, measuring system pressure by the latter, closing shutoff element and opening drain valve to release pressure from pressure gage. After pressure release, drain valve id closed. Inlet channel outlet consists of, at least, two communicated channels. Outlets of said channels are shaped to stepped channels. Outlets of said channels are arranged, mainly on valve body adjacent surfaces, preferably, perpendicular. At least, one outlet of said channels accommodates extra shutoff element, preferably, identical o main one. Pressure is fed into pressure gage by opening one of said shutoff elements, either main or extra one. Note here that unused shutoff element is kept open.
EFFECT: expanded operating performances, higher reliability.
5 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: needle valve comprises body with inlet and drain channels communicated via stepped channel, its edge making the valve seat, main and rain shutoff elements. Primary shutoff element is arranged to interact with seat made up of steeped channel edges while drain channel has branches. Note here that outlet of every said branch is shaped to taper threaded hole. Drain shutoff element is arranged, preferably in bush fitted in one of aforesaid holes and has seat while other holes accommodate, preferably, rearrangeable plugs, and preferably, pressure gage. Inlet channel outlet consists of, at least, two communicated channels with their intercommunicated inlets shaped to stepped channel. Outlets are arranged, mainly, on valve body adjacent surfaces, preferable, perpendicular. Note here that, at least, one outlet of said channels accommodates extra shutoff element, preferably, identical to primary one.
EFFECT: perfected design.
4 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: valve seal comprises a fluoroplastic ring insert. The insert is deformed when closed between two conical surfaces of a stem and a shell of a sealing unit, crossing between each other, at the side distant from the seat plane. A small section of the circular insert is formed between the stem and the shell, in the area of the surface contacting with the seat, has a cylindrical shape from the outside and inside, surfaces of which and the seat form radial slots. The sealing surface of the seat is arranged as conical with an angle in the base close to 0° and with a circular ledge on the smaller diametre.
EFFECT: stabilisation of a valve stroke and its hydraulic characteristics.
5 cl, 3 dwg