DE6810915U - CHECK BALL VALVE - Google Patents

Description

DR. HANS ULRICH MAY

Bo2617-3 JP Munich, ]] _t Dec, 1968

CG 251/674

Öommisaariab Ä. 1'Energie Atomique in Paris / France

Back impact ball ivonti 1

The innovation concerns a return ball valve, cS.h. sin valve, άΰ.3 allows a medium to flow through only in one direction and prevents aeJuan Dui-obgang ^ a the opposite direction

E3 are known from boreits aahlrsic-iie check valve, but guaranteed to be: lnct> a perfect tightness at the same time can be used deta Msdiviit, if there is a general opposite sense of the approved S-croömunsöx'iCiituntfia, a low pressure drop will flow in zugale-aaenen Richtmig very a3 lisähliche changes Strömungsnuerschnitte and very allniählirihe deflections fwae (knee) requires) luaö easy Aueeinanclftrneijnisn "ntindeateno vrenn ei oh üa.e medium" bsi high temperature and pressure is liolien "a first Problem'stellen the «Υ. Vtvwö'idenäea materials * The böötifü 'for media under high pressure :. cf.v. Hü-r.icochlsgTC'iitile," where the contact is on a Si:, k. "_. ··.-Ei i \\ ■ '- ..:. tatofi' Γ: ϊϊο1ζϊ, cannot at high temvjeratwr ί ; i: i ;: r., Cr .. ^ - ■, ri-iv- ^ rt '?: no plastic material known lat,

■. - ■ - -: -.- ^Λ ΐ Be-ii.r _t - -r.gcn bi bc'-or ΐίΪΑ-iperauur wider · » ^; ■■ - Γ, ' ^r .: -:; h] :. r -. ": RitiJ.s, in which the closure"

part and the valve seat are made of a cobalt-chromium alloy, which is known under a trade name; '· "Stellite", Due to the hardness of the two materials in contact, they only provide an absolute seal,

Another problem is the accessibility of the valve members located in the interior of the valve housing (valve seat, valve ball ■ xnü Eüekstsllfeder). This problem is easy to solve if you f '"· .- <· nan power the medium zvfei consecutive bi ec Toggle [;.. Zulasst he of 90 ° Di ο se solution leads However zv a high pressure drop, eggs in many cases, is not permitted. a aridere Löaung _v the entry and exit of the medium in a line leaves, ordered therein, the housing aua produce two pieces. This design, however, is from each other in the Strömungeachse removes his Iftimnii often not suitable wfinn the Check valve in lines for high pressures, which is supposed to be v / earthed in the process _.

The aim of Neunrujig is to produce a back-up ball valve that meets the practical requirements as the non-return valves known from binher, in particular because it is suitable for a medium at high temperature and high pressure, including desalinated water that circulates in the cooling system in a nuclear reactor cooled by pressure via gas care . The task is according to the innovation with a check ball valve with a housing, in which one to the outside of the GehMiuafts through a. Inlet channel and outlet channel, which in wGGeri.1; llohon lie in a nor line, :> η connected

.- '. unno ¹ mm / tf auo ^ ebildot is, erased by one in the recess

arranged valve seat holder, which delimits a passage widened to the inside of the valve, which connects the recess with the inlet channel, a valve seat made of metallic material with a low elastic limit and good corrosion resistance to the medium, which is let into a groove formed in the valve seat half, a valve ball a material of greater hardness than that of the valve seat and a small diameter that it can press against the seat, with the valve seat holder firmly connected Pührucgsvorrichtungen for guiding the valve ball during its displacements towards the valve valve and from there one the valve ball on their Sita pushing back elastic device and a locking device detachably attached to the housing, which ^{retains the valve seat holder i 1 of} the recess and slides out the elastic flat device, the valve ball and the vertical seat holder from the housing in one direction obliquely or perpendicularly right to the alignment direction of the inlet and outlet channels allows »

The innovation is explained by the following description of only a few examples, which are not to be understood in a limiting sense. The description also refers to the attached drawing. Herein show: FIG. 1 a P.Uckachlagkugelventil in section along a Syrumetriesbeno going through its axis, wherein the valve ball is shown in the pressure on its seat; Pig. 2 similar to Pig, 1 a modified version of a Rückaohlagkugelventil :. like the novelty,

The check ball valve shown in FIG. 1 has a housing 6 in which a recess 8 is formed which is connected to the outside through an inlet channel 10 and an outlet channel 12 which are in its direction. The recess 8 has a drehsynroietrische form * bie consists of a cylindrical portion 14 of larger diameter than the EiiilaS- and AuslaSkanäle _s u> it Deiri inlet duct "O ver" connected and au is concentric with it, and a kegelstumpffbrmigen part 16 for connection at the »" outlet duct) 2 "

The cylindrical part 14 of the recess h is filled by a valve seat holder 18 and a guide ring 20, which limit a passage for the medium flowing in the direction of the arrow f. Ü3r valve seat holder 18 slides with soft friction in the cylindrical part H- Through the valve seat holder there leads a passage 22 of s "t; i Ventiliiinaren av.sgf.iteter shape, the minimum diameter of which corresponds essentially to that of the inlet channel 10 c In the straight part of this passage The valve seat holder also has guide ribs 28 for guiding the locking ball 30. The valve seat holder 2E is held by the ring 20 on Ori; and Stella, which can be seen through Insert an opening 32 formed in the housing 6 into the housing 6. V / c-nn the panel 20 is in place, he holds the utility holder in a position in which it presses the sealing rings 34 against the housing 6. Dip opening i> 2. Is normally through e.itten stopi'er "36 vsrschloasen * hit" i Schweliänatit 38 ß'eviy ^ rloiatet; the tightness of the Vcrbi-iC · .g dea stopper unr ¹ äe & housings 6 "DIo Si 'i he rung do «p pot

I I <I

h pressure exerted on him from within takes place in any way ,; -.]

for example name attached to the housing 6 by bolts 42 \. \

Stop plate 40. One between the valve ball 30 and one ||

stop socket firmly connected to ring 20 by ribs 48!

46 compressed return spring 44 presses the valve ball j

50 on their site 26. Bio coaxially to the recess 8 arranged '

Stop cup 46 is shaped to cooperate with the ring 20 a \ passage of relatively constant cross-section _and; limited in spring case without sudden changes. In addition, this socket serves as a stop which limits the opening of the valve ball (position shown in phantom in FIG. 1),

The valve seat 26 must consist of a metallic material with a low elastic limit, good deformability and sufficient corrosion resistance in the medium. A valve seat made of gold, for example by electrolyte deposition or mechanical impressions, is sufficient in most cases. This valve seat must be at least 0.1 mm thick 5 mm did not need to be exceeded. The valve ball must have a high degree of hardness and sufficient resistance to the medium. In one embodiment, the non-return ball valve for use thereof in a flow-through of demineralized water at a temperature up to 300 ° C and under 150 bar pressure line consist the housing 6, the plug 36 and the ring 20 advantageously consists of rostlreiem steel. The valve seat holder 18 also takes care of the guidance of the valve ball 30 ", This preferably consists of a cobalt-chrome alloy, v / ie it is sold under the trade name" Stellite "

is known and available, but can also be made of metal carbide or a high-strength alloy which is commercially available under the trade name "Colmonoy * ¹ (e.Wz.)." Alloy sold by "Colmonoy" (e.Wz.) is a nickel alloy with 11.5 or 13 »5 # chromium, 3.75 or 4.25 # silicon, 4.25 or 4.75 # bison, 2.5 or 3 $ & Boron and 0.65 or 0.753 * carbon.

The check valve described has the advantage of easy accessibility to the one arranged in the recess 3 Parts (valve ball, valve seat, pressure ring, etc.); It is also very easy to assemble: with the plug 36 removed the sealing rings 38, the valve seat holder 18, the Valve cone 30 and the one provided with the return spring 44 Ring 20 inserted one after the other. The insertion of the ring 20 causes the sealing rings 34 to be compressed Housing 6 and the valve seat holder 18. Then the Plug 36 placed, with a sealing ring 50 similar to the sealing rings 38 is inserted to a provisional To guarantee seal. The plate 40, in turn, is fastened to hold the plug 36, and tests of tightness and perfect operability can be made on the non-return valve. If they are satisfactory, it will Weld 38 is applied and ensures the final sealing of the plug 36.

The check valve described has the advantage that it does not change the direction of the medium if this

i ι »ν» 4 ι * b

. : 1 I It f

flows in the permitted direction and feels like it permanent cross-section and only very gradual in each pail Changes in cross-section offer, waa to reduced pressure drop leads »If ea does not primarily depend on the To keep pressure drop as low as possible. And if ease of machining is the essential condition, can one can choose other configurations shown in FIG. For simplification, the parts of the return shown in Fig. 2 « valves, which already correspond to parts shown in Fig. 1, have the same reference numerals, but with the addition of a Index triohes provided.

In the check valve of FIG. 2, there is again a valve seat holder 18 'and a valve ball 30' which is pressed by a return spring 44 'onto the valve seat 26' arranged in the valve seat holder 18 '. In this embodiment, however, no guide and spring stop ring is provided ^! and to form a guide and a stop for the return spring 44 °. This embodiment is obviously simpler in terms of the processing required, but forces the medium flowing through the check valve according to the arrows f ° to two successive changes in direction Valve seat holder 18 ^e and the plug 36 ° is preferably small in order to keep the angle of the change in direction small, but the compulsory

the requirement for dismantling and access to the interior · » divide if daa check valve injsine complex arrangement I. is built in, lead to the choice of a considerable angle.

Of course, dae check valve described in more complex arrangements such as Eiektroventilen, balance · - valves, taps and safety valves us \ _"o aingebaut be ₀

systems The innovation also applies to flow control / _f for media that contain a non-return valve according to the innovation.

Claims (4)

Protection claims 1 “) e-ball valve with a housing in which, sine Recess is formed, which to the outside of the housing : the through an inlet and outlet channel, / lying essentially in one line, in connection with a valve seat made of metallic material with a low elastic limit and good corrosion resistance in the cedium} a valve ball made of a material greater hardness than that of the valve seat and such a diameter that it can be pressed against the valve seat? P ^ iirungsvorsich · = · tungen firmly connected to the valve seat holder for guiding the displacements of the valve ball towards and away from its seat and an elastic device for pushing the valve ball back onto its seat, characterized in that the valve seat (26) is in a groove is introduced, dl "is formed in a valve seat holder (18) inserted into the recess" the one extended to the valve core, the passage connecting the opening with the inlet channel (10) and fastened in the recess by means of the housing so that it can be removed attached devices is _s "oak removal of the elastic. Device and the valve seat holder out of the housing in one direction to the direction of the inlet · » (10) canal / and the Aualaßkanala (12) inclined or perpendicular direction enables o 2.) Check ball valve according to claim 1, characterized in that that the metallic valve seat made of gold and the valve ball made of a metal compound of great hardness, such as a chrome-carbon Alloy, a metal carbide or a nickel alloy alt e'nem Content of chron, silicon and iron, . · 10 - ■ · 3O ball return valve according to claim 1 or 2 _t üeAu "eh characterized _p that the valve seat holder in ac: ·. ¹ recess dnr h a guide ring (20) is held immovably, which is sealed in the recess by means of a, help e ^ Yiös Stopper 06,40) closable opening άβ 3 housing transversely to the flow » direction of the medium can be introduced- 4.) Kugelrückschlagventii according to claim 1,2 or 3 _S ,, characterized in that the axial vanes FUhrungaring ait an average Andruckpfanne a spring bears _t which tfie ^ au olastiüchs device uia pushing back the valve ball? forms their valve seat. ^c o) Rückachlagkuge! valve according to claim 1 or 2 _S daduroh characterized that the valve seat holder f1B ^{ ) into the recess obliquely with respect to the direction of alignment of the inlet channel dO ") and the outlet channel (12 °) and along the axis of the valve seat through a through a tight plug ^ 36 °, 40 ") closable cylindrical opening of the housing can be inserted»