Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K15/00—Check valves
  • F16K15/02—Check valves with guided rigid valve members
  • F16K15/06—Check valves with guided rigid valve members with guided stems
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K15/00—Check valves
  • F16K15/02—Check valves with guided rigid valve members
  • F16K15/06—Check valves with guided rigid valve members with guided stems
  • F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring

Definitions

• Back-pressure valve in particular for pipelines, for ensuring the one-way flow of the streaming medium
• the invention relates to a back-pressure valve , in particular for pipelines, for ensuring the one-way flow of the streaming medium by means of the closing head which is able to move axially in the streaming medium.
• armatures with different structures are used for achieving a one-way stream. Beside the usual passing ball check valves and regulating flaps the catalo gue of the company GUSTAV F. GERDTS KG.
• BREUEN presents check valves with a disc-shaped closing element having been fixed in the house with ribs on the outer part or intruding into the medium, i.e . a special bearing element , a piston, are serving for guidance .
• the house of said valves is widened for achieving proper passing cro ss-section. Due to the flat-disc-shaped closing element the structural length is utmost short involving significant savings in material compared with the traditional solutions.
• the aim of the invention is to provide a valve for preventing backflow, which can be installed in an optional direction and which - compared to the known solutions (with the exception of the previously described type) - is operating with a more advantageous streaming loss factor and with a more economical specific material consumption rate.
• a further requirement lies in the defined closing characteristics and that it could be adjusted within the practically required range , the formation should be simple and operational safety could be ensured.
• the structural design has to enable application in the pressure-, size-, temperature and medium ranges being in compliance with industrial requirements and a coating could be applied thereon. Besides it should be suitable for special purposes, so e . g. heating and cooling and should indicate the closed and open state, respectively, simultaneously enabling a retarded closing.
• the task set is solved in such a manner that the back-pressure valve is provided with a closing head the confining surfaces of which are following the stream lines of the streamin g medium stream, on the bearing element having been fixed in the medium stream, a guide pin is formed guiding the closing head, while the house is formed with a surface enabling the closed state by means of the closing head; the bearing element is fixed to the house, at the same time the inner surface of the house and the bearing element, as well as the outer surface of the closing head and the ribs are formed so, as to yield a transitional cross-section being constant or reduced between the closing diameter and the end of the closing head profile being surrounded by the streaming medium.
• the embodiment is also to be considered as advantageous, with which in downstream the flow cross-section is continuously narrowed from the closing diameter up to the end of the closing profile surrounded by the streaming medium and increased continuously therefrom.
• the house of the back-pressure valve is enclosed by jointing flanges which are connected to the valve in a sealed manner.
• the closing head may be formed as a solid body, however, a hollow construction is also possible.
• the solid closing head may be made of a material with sealing properties with a metal reinforcing element inside.
• a material being resistant to the medium e.g. with rubber, a synthetic material, PTFE, enamel, chrome, nickel, etc.
• the back-pressure valve according to the invention may be installed in any optional direction, it is well suitable for closing processes with required closing characteristics, the more, for retarded closing.
• the profile to be followed by the streaming mediums, as well as the flow cross-section not being increased downstream ensure the reduced streaming losses in comparison to known types, since by said measurements the pressure losses resulting from the mutual transformation of the energies of flow separation, pressure and velocity are considerably reduced, i.e. the continuously reduced cross-section in downstream simultaneously eliminates the flow separation induced by the directional deviations.
• a reduced specific material consumption rate may be achieved, in particular by clamping the house between the flanges.
• a house with a closed cavity tasks relating to heat power engineering may be also solved.
• Simultaneously considerable savings of handwork and mashining capacity may be achieved by forming the house and the bearing element as a monolithic valve body.
• the valve according to the invention may be performed in a simple and economical manner, especially, when the valve seats are used on the closing surfaces.
• the construction is simple and there are no sliding surfaces subjected to the streaming medium, highgrade operational safety may be achieved, when a magnet is installed in the closing head and a coil is contained in the house, the valve can be well used as an indicator indicating the direction of streaming; due to its simple construction, a protective coating can be easily applied.
• the special advantage lies in that the house is formed as a cylindrical shell subjected to an internal overpressure, accordingly, it may be prepared within the pressure- and dimensional range required in the industry: at a given dimension the structural length is the same for any pressure.
• Figure 1 is a longitudinal section of one of the embodiments
• Figure 2 is a longitudinal section of another embodiment
• Figure 3 is a longitudinal section of an embodiment, with which the house and the bearing element are formed as a monolithic valve body,
• Figure 4 is a sectional view of a solid closing head having been provided with a metal reinforcing element
• Figure 5 is a further preferred embodiment shown in the longitudinal section.
• Figure 6 illustrates an embodiment with a hollow house and a closing head.
• the house 3 of the embodiment according to figure 1 is clamped between the jointing flanges 6 by means of screws and on the entering side, at the entrance of the medium, on the closing diameter there is the valve seat 12 arranged having been, fixed byizing or by shrink fit.
• the solid closing head 1 is provided with the aperture 20.
• the bearing element 2 is provided with the ribs 2a with an airfoil cross-section being connected to the guide pin 2b carrying the closing head being arranged in the streaming medium, fthen the valve is opening or closing, the aperture 20 in the closing head 1 ensures inflow or outflow of the medium to/from the space 20a lying before the guide pin 2a.
• this embodiment can be installed in any optional direction, at the same time the desired closing characteristics may be adjusted by the calculated compression of the spring and installation to the proper place.
• the bearing element 2 On the discharge side the bearing element 2 is fixed to the house by means of the threaded connection within the sealing diameter of the flange 6, accordingly, and separate sealing becomes superfluous.
• a flow cross-section can be formed, which is continuously narrowed from the valve seat 12 to the end of the guide pin 2b, whil.e therefrom a diffuser tract with a high efficiency is leading to the entering cross-section.
• the back-pressure valve having been formed in the specified manner can be applied to media of any pressure by simply changing the outer dimension of the house in dependence of the pressure.
• the screw 17 In the open position of the valve the screw 17 is limiting the extrem position of the closing head 29, which has to be adjusted in course of installation.
• the aperture 18 formed in the guide pin of the bearing element 28 ensures the out-or inflow of the medium.
• the diffuser is arranged on the discharge side .
• the closing head 29 is formed with a cavity resulting in the advantage of a minimal material requirement and lightweight.
• the diffuser is formed in the connecting element 5.
• the guide pin 13a of the monolithic valve body 13 is arranged on the discharge side, where the medium is leaving the system; an axial aperture 21 thereon is promoting the inflow and outflow of the medium in course of the displacement of the closing head 32.
• the solid closing head is connected to the fuide pin 13a, the nose-part is slightly elongated, as a consequence, streaming resistance will be less.
• the valve seat 22 is arranged .
• On the inflow side of the valve body 13 the valve seat 11 is clamped by means of the insert 14; this solution enables a quick repair.
• the diameter has been chosen in such a manner that after having removed the components 11 and 14 the closing head 32 can be lifted out or in stalled.
• the embodiment according to figure 3 can be installed in the illustrated position only, while the closing characteristics may be changed by the weight of the closing head 32.
• the valve body 13 is connected to the system via the thread 8. From the embodiments described this type can be manufactured with the least material requirement, as the valve body 13 is formed as a shell.
• the closing head 41 is made of the sealing material itself, so e.g. of rubber, polyurethane etc., preferably with an elongated nose.
• a metal reinforcing element 15 having been provided with the aperture 15a and being connected to the guide pin 2b.
• the valve may be well adapted to media with temperatures being otherwise harmful for the armatures.
• the guide pin 19 was formed as an independent piece which is connected to the bearing element 39 by means of a threaded bond.
• the hollow closing head 30 is shaped as a spherical shell and it is connected to the guide pin 19 via the insert 16 which is connected thereto with a threaded bond.
• the aperture 33, in the insert 16 the aperture 31 have been provided for.
• Such a formation of the closing head 30 is to be considered as most advantageous in the range of large dimensions and high pressures.
• Other parts of the armature may be formed in accordance with figures 1,2 and 3.
• the back-pressure valve operates, as follows: prior to the start of streaming the closing head is in, a closed position. When the stream of the medium is put into motion, the closing head is displaced on the guide pin in dependence of the closing characteristics, whereby the flow cross-section is set free. When the flow is stopped, in dependence of the closing characteristics of the valve, prior to, simultaneously with or following the backflow the closing head is repeatedly displaced and closes the flow cross-section.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Check Valves (AREA)
• Lift Valve (AREA)
• Safety Valves (AREA)
• Pipe Accessories (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=10952404

Family Applications (1)

Country Status (6)

Families Citing this family (4)

Citations (6)

Family Cites Families (6)

• 1981
  • 1981-04-17 HU HU8110048A patent/HU184425B/hu not_active IP Right Cessation
• 1982
  • 1982-04-16 WO PCT/HU1982/000016 patent/WO1982003673A1/en not_active Application Discontinuation
  • 1982-04-16 JP JP57501262A patent/JPS58500535A/ja active Pending
  • 1982-04-16 EP EP19820901148 patent/EP0076297A4/de not_active Withdrawn
  • 1982-04-16 DE DE198282901148T patent/DE76297T1/de active Pending
  • 1982-04-16 AU AU83357/82A patent/AU8335782A/en not_active Abandoned

Patent Citations (6)

Non-Patent Citations (1)

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