DE8807860U1 - Hand valve - Google Patents

Description

Hand valve

The invention relates to a manual valve according to the preamble of claim 1.

In pipeline systems for gas or oil, shut-off devices are provided that partially or completely shut off a section of the line. In addition to pneumatic or electric valves, hand valves are used to shut off fuel lines with large cross-sections in order to be able to shut off manually in the event of danger. With hand valves, the shut-off device is moved axially in the direction of flow via a spindle with a handwheel. Such hand valves can be operated with little effort. On the other hand, opening or closing the hand valve requires many turns of the handwheel, so that the opening or closing time is long. With

Telephone: (0221)131041 Telex. 888 23O7 dopa d Fax: (02 21) 13 42 97 (0221)134881 Telegram: Dompatent Köln

Accounts:

, ßal. Oppenheim Jr. & Oe.. Cologne (bank code 37O3O2OO) Account no. 1O76O J Dj5utscrieBankAG.Köln{BLZ37O7OO6O)Account no.1165O18 : Pj3StgiroKöln(BLZ37010050)Account no.654-500

For valves whose shut-off element is moved by rotating across the flow direction, the opening and closing time is short. However, the disadvantage is the high operating forces.
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The invention is based on the object of providing a manual valve with a short opening and closing time combined with low opening and closing forces.

This object is achieved according to the invention with the features specified in the characterizing part of claim 1.

In the event of a fault or emergency, the manual valve can be closed immediately by simply pulling down the swivel lever. Furthermore, in the event of a fault, the operating personnel can immediately see from the position of the swivel lever whether the section of the line behind the manual valve is blocked and can react quickly if necessary.

The slide is permeable in the longitudinal direction and is thus relieved of the axial pressure of the medium. This pressure relief results in low operating forces for closing or opening the manual valve. .

The movable slide is connected to a piston rod. The piston rod, which can be moved axially using the swivel lever, is led out of the valve housing. The passage of the piston rod through the valve housing is sealed by a seal in the upper part of the valve housing.

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sits. In its open position, the slide is located directly below the pressure-side part of the seal. On the other hand, in the closed position of the slide, the cylindrical piston rod is almost completely sunk into the valve housing. This means that the height of the manual valve can be kept relatively low.

Preferably, a locking element is provided that automatically blocks the swivel lever in its closed position. This locking option is intended to secure the manual valve against unintentional opening. A mechanically acting lock is particularly necessary if the line section behind the manual valve has to be securely shut off, for example for repair work.

An adjustable stop is conveniently provided to limit the movement of the swivel lever in the opening direction of the slide. The manual valve is not only suitable for quick and easy shut-off or opening, but also for controlling the flow rate or the flow rate.

In the following, an embodiment of the invention is explained in more detail with reference to the single figure of the drawing.

The drawing shows a vertical section through the manual valve with the swivel lever.

According to the figure, the valve housing 1 has an inlet pipe socket 2 and an outlet pipe socket 3 attached transversely to it. The axially movable slide 4

consists of a pipe section 5, which is axially displaced in a guide cylinder 6 that encloses the pipe section. In its closed position, the slide 4 is surrounded by an annular space 7. The annular space 7 is connected to the inlet pipe socket 2.

In its open position, the slide 4 opens an annular passage 8 which is formed between the inner wall of the annular space 7 and the valve seat 9.

The inner wall of the annular space 7 is formed by the guide cylinder 6. In the open position of the slide valve 4, this is completely contained in the guide cylinder 6. The extruding medium passes through the inlet pipe socket 2 via the annular space 7 and the outlet 8 into the outlet pipe socket 3. In its closed position, the slide valve 4 dips into the bore 25 through which the outlet pipe socket 3 is connected to the rest of the valve housing 1. The slide valve 4 closes the passage 8. The sealing against the valve seat 9 in the bore 25 is carried out by an O-ring 11 sitting in an annular groove 10 in the pipe section 5. The seal 13 seals the pipe section 5 against the guide cylinder 6.

A holder 15 is attached to the inside of the pipe section 5, which has several openings 35. The slide 4 is thus relieved of the pressure of the medium and can easily be ^moved axially. The pressure chamber located behind the holder 1.5 and facing away from the outlet pipe socket 3 is sealed off from the valve housing 1 by a cover attachment 16. The cover attachment 16 is screwed on with the screws 17. In the symmetry axis of the slide 4 there is a piston rod 18 screwed to the holder 15, which consists of

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the cover attachment 16 and whose passage through the cover attachment 16 is sealed with the seal 19. The axial movement of the piston rod 18 and the slide 4 connected to it takes place via a pivot lever 20. The pivot lever 20 is provided with a ball handle 22 at its end. A hinge bracket 26 is attached to the valve housing 1 at the side next to the end piece 21 of the piston rod 18 protruding from the valve housing 1. The pivot lever 20 is connected to the hinge bracket 26 at its end opposite the ball handle 22. The end piece 21 is also connected to a bolt 27 which extends through an elongated hole 28 in the pivot lever 20. If the pivot lever 20 is moved in the plane of the piston rod 18, the slide is moved axially.

The maximum opening position of the slide 4 can be limited with an adjusting screw 23. This adjusting screw 23 is screwed into the cover 29 of the hinge bracket 26 and locked with the nut 30. If the pivot lever 20 is brought into the opening position, it hits the stop 34 of the adjusting screw 23 .

Furthermore, the pivot lever is drilled through between its articulation points. The pivot lever 20 is locked in place by a pin 32 which automatically engages through a hole 31 in the side wall 33 of the hinge bracket 26 that is aligned with the hole 24 of the pivot lever. The hole 31 in the side wall 33 is arranged in such a way that the slide 4 is blocked in its closed position.

Claims (3)

I · !•It · 1 ■ CLAIMS 1. Hand valve, with a valve housing (1) having an inlet and an outlet, a slide (4) movable in a guide cylinder (6) of the valve housing (1) which is connected to a transmission part leading out of the valve housing, an adjustment device for moving the transmission part, wherein the inlet is connected to an annular space (7) surrounding the slide in its closed position, which is separated from the outlet by a valve seat (9),
characterized, that the slide (4) is permeable in the longitudinal direction, that the transmission part is a piston rod (18), that the passage of the piston rod through the valve housing (1) is sealed and that the adjusting device consists of a pivoting lever (20) that can be pivoted in the piston rod plane. 2. Manual valve according to claim 1, characterized in that a locking element (32) is provided which automatically blocks the pivot lever (20) in its closed position. 3. Manual valve according to claim 1 or 2, characterized in that an adjustable stop (34) is provided for limiting the movement of the pivot lever (20) in the opening direction of the slide (4).