DE7134656U - Pressure relief valve - Google Patents

Description

write .-. ν the German Patent Office, Munich aiatt: -1- (R 32) / J-

Care

Pressure relief ^{r ^ ntil r> nl! Lfr} September 6, 1971

Pressure relief valve

The present innovation relates to a pressure relief valve with a valve housing and a cylindrical inner cavity, one arranged therein closable by a valve body Valve seat, line connections on both sides of the valve seat in the housing and a device for lifting the valve body from the valve seat.

In a known pressure relief valve, the valve body has been lengthened and has a handle at its end which the valve body pressed against a spring into the valve seat can be pulled out of the seat. When you let go of the Handle, the valve body is pushed back into the seat under the action of the spring. With this well-known pressure relief valve no automatic actuation and also no adjustable opening of the valve was possible.

The present innovation has the object to create a pressure relief valve 'ZVx, which can be opened automatically by connection eir ^c r pressure medium line and automatically upon release of the pressure in the pressure medium line again slept. The object must also be achieved that the valve has a handle with which it can be opened in an adjustable and lockable manner. In addition, the claim is to be invoiced

713 A 6 56-Vi. 72

L ROSiSTA GmbH

write ar. the German Patent Office, Munich Bimt; -2-

Pressure relief valve ^Π * " ^1Γ " September 6, 1971

wear, to build the pressure relief valve from as few and simply divisible parts as possible > "Rs must still be easy to dismantle and disinfect bearing pressure-tight piston, between which and an adjustable abutment a spring loading the piston in the closing direction of the valve is mounted and that the valve body has a thread at one end that supports a nut which in turn has an axial surface against the valve housing supports.

This innovation according to the invention has the great advantage that the valve housing is one to its longitudinal axis can form symmetrical body, which receives the valve body, the piston and the lifting device in its interior. This body can be mass-produced cheaply on, for example, an automatic lathe. In addition, there are none Undercuts, so that the hollow cylindrical valve housing body easy to clean.

Further useful refinements and advantageous developments The innovation can be seen from the following description, the subclaims and the drawing. In the drawing i ^ t a Embodiment of the hay shown in a longitudinal section.

R0S8STA GmbH ..

Letter to the German Patent Office, Munich Dian -J-

Pressure relief valve with .. · g _# September 1971

In a hollow valve housing 1 there is a Inner space 2 ,, which is delimited by axial surfaces 3 and 4. A thread 5 (not shown) can be attached to the axial surface 4 via a thread 5 Connected to the room and vented. Der Innenrauin 2 de? Valve j housing, which is kept smallest in diameter in the area 6 is, expands at 7 and there forms a valve seat. A leakage line 10 is connected to a line space 9. With the valve seat 8 corresponds to a cylindrical valve body 11 which is crowned at its tip.

The valve body 11 is one end of a generally cylindrical Inner part 12 which is mounted within the valve housing. One storage point is at 13, the storage point at the same time contains a seal H for the pressure medium space 9 Further up, the cylinder part 12 carries a piston 16 which is provided with a seal and which is guided in the valve housing at 17 in a pressure-tight manner is. Between the seals 14 and 15, a pressure medium space 18 is formed in the valve housing, which via a Hadial bore 19 can be acted upon with a pressure medium. In the area 20, the inner jacket 21 of the valve housing is provided with a thread 22 provided, into which a threaded part 23 is screwed. On the shaft 24 of the cylinder part 12 is between the piston 16 and the Threaded part 23 a compression spring 25 clamped. The spring tends to move the piston 16 and thus the valve body 11 downwards, i.e., press against the valve seat 8.

ROSlSTA GmbH

write on: the German Patent Office, Munich Pressure relief valve

^{L πι:}

6 September 1971

The cylinder part 12 is extended beyond the shaft 24 and carries at its upper end 26 a thread 27 · is on this thread a knurled nut 28 screwed on, which is with its axial surface 29 is supported against a sealing nut 30.

By means of a seal 31, the cylinder part 12 is opposite the Sealing nut 30 sealed, but guided so that it can move axially.

The puncture of the pressure relief valve just described is the following:

The valve body is normally under the action of the spring 25 11 pressed into the valve seat δ of the valve housing 1. Consequently is the interior 6 compared to the Cea rooms 9 tier line 10 in terms of pressure locked. If pressure medium is now fed to the interior 2 of the valve housing 1 via the axial bore 19, the pressure rises

^ larger , in the pressure medium space 18 at. If this DrücTSvlils the force opposing the piston by the spring 25, so bev. ^T 3gt the piston together with your cylinder part 12 upwards, so that the valve body 11 is lifted off the valve seat 8. Thus, the internal space 6 and the rooms connected to it are relieved of pressure in terms of pressure. The outflowing pressure medium, be it a gas or a liquid, flows out via the space 9 or the line 10.

When the pressure in the pressure medium space 18 decreases, the piston moves downward under the action of the spring 25 and closes off room 6.

b Ü ^: :: ^ ü ^: ::: * - I RosisTA GmbH 3-

write to the German Patent Office, Munich rim »: -5- <r

Pressure relief valve Damn. September 6, 1971

If the space 6 is now to be relieved of pressure without the pressure medium is present in the line 19, the knurled nut 28 is rotated. Thus, the thread 27 of the cylinder part 12 screws into the Mother in; but since this is supported with its axial surface 29 against the valve housing 1, the cylinder part moves 1ί upwards. Thus, the valve body 11 is lifted from the seat 8 and the valve can be opened continuously or adjustable also locked in the open position. When turning back the knurled nut 28, the valve closes by the action of Spring 25-

- 6 - Claims

Claims (4)

Expectations 1. Pressure relief valve with a valve housing3 with a cylindrical Inner cavity, a valve seat arranged therein that can be closed by a valve body, line connections on both sides the valve seat in the valve housing and a device for lifting the valve body from the valve seat, characterized in that that the valve body he (11) one in the valve housing (1) Pressure-tightly mounted piston (16) carries between the and / an adjustable 'abutment (23) a piston in the closing direction the valve loading spring (25) is mounted and that the valve body has a thread (27) at one end (26), which supports a 'nut (28), which in turn is supported with an axial surface (29) against the valve housing. / 2. Pressure relief valve according to claim 1, characterized in that that the abutment (23) is formed from a threaded piece which is screwed into the valve housing. / 3. Pressure relief valve according to claim 1 or 2, characterized in that that the nut (28), the threaded piece (23), the piston (16), the valve body (11), the valve housing (1) and the connecting line (6) of the room to be monitored are aligned with one another. 4. Pressure relief valve according to one of claims 1-3, characterized in that the pressure medium supply line (19) and the Leakage line (10) open radially into the valve housing. /