DE2649053A1 - Valve with main and auxiliary plugs - has auxiliary seat and control passage in spigot through main plug - Google Patents

Abstract

The valve with main and auxiliary plugs has a main seat with plug working against it under the action of a movable end wall of a pressure chamber, the latter being connected by throttle passages to the inlet pressure chamber accommodating seat and plug. A control passage connects the pressure chamber to the low-pressure chamber, and contains an auxiliary plug controlled by an actuator, working against a stationary seat. The main plug (6) has in its movable end wall (10) a central lengthwise drilling (14), through which there passes an axial spigot (13), connected to the passage (19) form the main plug seat (16). This spigot contains the control passage (18) with an auxiliary plug seat (21).

Description

GESTRA-HSB sales agency Bremen, October 27th, 1976 mbH & approx. limited partnership TSR-Bs / Gr -1022-

Valve with a main and an auxiliary closing part

The invention relates to a valve with a main and an auxiliary closure part, as described in the preamble of the main claim is specified.

In the case of valves without an auxiliary closing part, correspondingly large actuating devices are required to control large throughputs. The advantage of the valves mentioned at the beginning with an auxiliary closure part is that "es-xiart only needs relatively small actuating devices for this Zuieck, thanks to the auxiliary closure parts.
1G In known valve designs of the last-mentioned type (US Pat. No. 75B 965), however, the structure of the pressure chamber used to control the main closure part turns out to be very laborious. For example, a special pipeline is required through which the flow medium can flow out of the pressure chamber into the low-pressure chamber of the valve.

The invention is based on the object of the valves mentioned type to the effect that their control device characterized by a simple souiie robust structure and moreover, one in a simple manner in the valve housing usable structural unit forms.

The task at hand is achieved through the application of the Part of claim 1 specified features of the invention solved.

The control channel controlled by the auxiliary closure part then opens now into the passage of the main valve seat, so that the special pipeline and the connections are superfluous potential leakage points to be seen at both pipe ends between the upstream and the low pressure chamber of the valve are eliminated. The valve seat body of the main valve seat can also form the support body for the entire control device and is then to be fastened as the only part in the valve housing.

809818/0241

GESTRA-HSB sales memo TSR-Bs / Gr -1022-

mbH & approx. limited partnership

2849053

The subclaims give particularly advantageous further developments of the idea of the invention.

Claim 2 has a structurally extremely simple bracket the pressure chamber to the subject.

In contrast, claims 3 and U indicate two preferred embodiments of the pressure chamber.

The embodiments of the invention according to claims 5 to 7 in turn serve to achieve a proportional, so not jerk-like operation of the main closure part, which is for Plants with large throughputs proves to be a significant »advantage.

The invention is illustrated below with reference to the drawing Embodiments explained in more detail. It shows:

1 shows a float-controlled valve according to the invention Auxiliary locking part and

FIG. 2 shows a section of another embodiment variant of the valve from FIG. 1.

In Fig. 1, a between the form 1 and the Low pressure chamber 2 of a valve housing, not shown in detail, partition 3 has a passage * t into which a Valve seat body 5 is used. Another one planned Main closure part 6 is controlled via a pressure chamber 7, for which purpose an auxiliary closure part B is arranged, which has a float 9 arranged in the pre-pressure chamber 1 as an actuating device having. Instead of the float 9, z. B. i.a. likewise a thermostatic working element or an electromagnet be provided.

The pressure chamber 7 comprises a lower end wall 10 which can be lifted and which carries the main closure part 6. Furthermore is a upper end wall 11 is provided, and between the two end walls 10, 11 a bellows 12 extends in the periphery, which is attached to its ends with the outer edge regions of the end walls 10, 11 connected is.

GESTRA-KSB drive unit TSR-Bs / Gr -1022-

mbH & Cd. Limited partnership

The upper end wall 11 is otherwise of εϊπεπι axial connector 13, which is centrally and stationary on the u-valve seat body 5 is provided and the main closure part 6 and the end wall 10 through a longitudinal stretch 1 ^ + provided therein into the interior of the chamber 15 interspersed into it. Here the u-valve seat body is waisted 5, in addition to an outer first main valve seat 16, a central, second seat surface 17 concentrically surrounding the axial connector 13 for the main connector 6.

The longitudinal bore of the axial connector 13 forms a control channel 18, which on the one hand into the passage 19 of the valve seat body 5 opens and, on the other hand, is connected to the chamber interior 15 via radial bores 20. Said radial bores 20 are in the present case over the length of the inside the pressure chamber 7 located part of the axial connector 13 arranged distributed. In addition, an auxiliary valve seat 21 is in the StBuerkanal 18 for Provide the auxiliary connector 8, the shaft 22 of which is the end wall 11 interspersed. Finally, throttle channels connect 23, 2 * t the chamber interior 15 with the primary pressure chamber 1.

If the auxiliary closure part 8 is in the closed position, then the full pre-pressure prevails in the KammErinnEren 15 via the drift channels 23, 2k and holds the main closure part 6 in the closed position on the two seat surfaces 16, 17.

If, on the other hand, the float 9 lifts as a result of the increased medium level in the primary pressure chamber 1, the auxiliary connection part fl from the auxiliary valve seat 21, the pressure in the chamber interior 15 drops below the primary pressure from, and thereby the main closure member 6 is liftable from the same Front wall 10 raised from its closed position » During this opening stroke, the end wall 10 initially covers the lower and later the higher radial holes 20 so that the outflow from the chamber interior 15 is throttled more strongly. This in turn asked for a slowing down of the opening stroke BS to the TdI-ge, with which an unfavorable sudden opening of the main closure part 6 and achieved a gradual opening instead rst.

809318/0241

GESTRA-HSB sales team _{Tqp q / r}

mbH & Co. KommanditgessllBshaft lüK-ue / ür -

With the variant according to Flg. 2 carries the liftable End wall 1D on its outer edge is a cylinder liner 25 into which the upper end wall 11 engages like a piston. The inner wall surface 26 of the cylinder liner 25 as well as the circumferential surface 27 the end wall 11 are conical, so that the between the two formed throttle ring channel 28 with the opening stroke of the main closure part 6 enlarged. This increases Medium flowing from the oil pressure space 1 into the chamber interior 15 also has the effect of slowing down the opening movement of the main IG Closing part 6, as it is due to the superimposed arrangement of Radialbahrungen 2G in Fig. 1 is achieved.

As can be seen, the valve seat body 5 and the Pressure chamber 7 combined via the axial connector 13 to form a compact installation unit, which is structurally and technically manufactured particularly simple design.

Ö0981S / O2A1

GESTRA-KSB V / ertriebngnsells ^ haf ': mbH & approx. limited partnership

TSR-Bs / Gr -1022-

List of reference symbols

1 Form space 19th Read through 2 Low pressure room 20th Radial bore 3 partition wall 21 Auxiliary valve seat «♦ Through-hole 22nd shaft 5 Valve seat body 23, Zk throttle channels 6th Main locking part 25th Cylinder bush 7th Pressure chamber 26th Indoor pool B. Auxiliary locking part 27 Circumferential area 9 Student 28 Throttle channel 10, 11 forehead 12th Bellows 13th Axial connector 1i * LMngsbohrung 15th Chamber interior 16 Main valve seat 17th Seat 1B Control channel

S09818 / 0241

Blank page

Claims (7)

GESTRA-HSB drive shaft TSR-Bs / Gr -1G22- mbH & Ca. Hammanditgesellachafi. Claims (I-valve with a valve housing in its pre-pressure chamber a main closure part cooperating with a main valve seat and a pressure chamber are provided, the latter being a lifting-movable end wall controlling the main closure part, one or several the inside of the hammer with the pressure chamber of the valve housing connecting throttle channels and a control channel leading from the inside of the hammer to the low-pressure chamber of the valve housing has, which is provided with a fixedly arranged auxiliary valve seat, with which one of an actuating device controlled auxiliary closure part cooperates, thereby characterized that the main closure part (6) together with the lifting end wall (1G) has a central longitudinal bore (1 * 0 and that a longitudinal hole (1Ό penetrating, axial connector (13) opening into the passage (19) of the main valve seat (16) is provided, which connects the control channel (18) including the auxiliary valve seat (21), the Main valve seat (16) via a concentrically surrounding the axial connector (13) and cooperating with the main closure part (6) central seat (17) has. 2. U-valve according to claim 1, characterized in that the axial connector (13) with its one The end is held on the body (5) of the main valve seat (1S, 17), while at its other end it has a stationary end wall (11) of the pressure chamber opposite the lifting end wall (1Q) £ 7). 3. U-valve according to one or both of claims 1 and 2, characterized in that one of the two End walls (1G or 11) have a cylinder liner (250) on their outer edge, into which the other end wall (11 and 10) 3D kelb & narti ^ ei-ngreiFi ^ 4. U-valve according to an ader report dar ^ claims 1 and 2, gEkiJi-uzBiEliflEt d = u τ ch Binen between loaded end walls XiQ_, 113 -eratreckEnd bellows (12O _{4 of} the GESTRA-HSB Uertriebsgeseliochaft TSR-Bs / Gr -1022- mbH & Co. HommanditgePBJ !schaft Ends tightly with the outer edge area of both end walls (10, 11) is connected. 5. l / Bntil according to one or more of claims 1 to h _t characterized in that the Axialstut-2ΒΠ (13) in the DruckkammErinnBrEn (15), over ξείπε longitudinal vsrteilt, more Radialbahrungen (20) aufuEist. 6. l / sntil according to one or more dsr claims 1 to k, characterized in that the Axialstut-ZEn (13) in the DruckkammErinnETEn (15) has at least one radial slot extending in the longitudinal direction of the connector. 7. l / sntil after one or several of the preceding 'speak, characterized by the fact that the Longitudinal section (ii ») of the hubbBUJBbaren end wall (10) as well as the Axial stubs (13) and / or the inner surface (26) of the cylinder bushing (25) The circumferential surface (27) of the piston-like End face (10) are designed so that the / between ίηηεη bBstBhsnde (n) DrosselringkanäKe) (2Θ) with their width change the stroke of the main locking part (6). J-tl