DE8433993U1 - Plastic drain valve for liquid containers - Google Patents

Description

-4η that '. ^: · ·. * | * · , Altenkipchen, 1SA1AS8U \ '

German Patent Office "'*' jJ

Two-way street 12

SOOO Munich 2

Utility model description:

for Mr. Helmhold Schneider, Petersbachweg 1, 5230 Altenkirchen

Description:

Plastic drain valve for liquid containers

Description:

The invention relates to an outlet valve made of plastic for liquid containers, in which a valve disk is actuated by means of an eccentric.

Valves based on this functional principle are known and already are often used for liquid containers. However, these valves are designed to be relatively complex and consist of a large number of individual parts.

For example, an embodiment is known in which an eccentric disk is slipped onto an eccentric shaft, which in turn is inserted into an eccentric guide The valve disc slides. Another disadvantage of this design is that this construction for the eccentric disk, eccentric guide and eccentric axis takes up a lot of space within the flow cross-section and thus considerably reduces the outflow velocity of the media.

There are also valves with rotary flaps and spindle-operated valve poppets known, which are mainly attached to disposable container '. In addition to proper function, it is important that the overall length is as short as possible. Since the valves must not protrude beyond the outer dimensions of the container, it is necessary to provide corresponding indentations in the container walls for the valve arrangement. this however, it is extremely obstructive for the container to be emptied completely. So-called dead spaces are formed on both sides of these retractions, which only can be insufficiently emptied.

It has been shown in practice that there is always a residual amount of some percent remain in the containers. In the case of expensive filling goods, this is ■ a not inconsiderable loss.

The depth of the container retraction corresponds approximately to the length of this Valve types. It is therefore obvious to design valves with the shortest possible length.

In previously known embodiments, the valve housing during of the blow molding process, i.e. during the manufacture of the container containers. For manufacturing reasons, the valve body must be flush with the container wall at the welding point.

The invention is based on the task of designing a valve so that there is a short overall length outside of the container, whereby a good residual emptying is made possible. Furthermore, the valve should consist of a few components, i. H. thus inexpensive to manufacture, simple easy to assemble and operate.

This is achieved according to the invention in that an eccentric in a Eccentric guide of a valve disk arranged perpendicular to the eccentric axis slides. The eccentric axis is supported on the handle side with an eccentric inlet and opposite it in a bearing bush formed on the valve housing. When the eccentric rotates, the eccentric yoke describes a semicircular movement in the eccentric guide, whereby the valve disk moves in the axial direction and the valve opens or is closed.

The invention provides two possible embodiments for the eccentric bracket -before. On the one hand, there is an eccentric to be produced by injection molding shown, on which a bearing plug is formed on the handle side and which has a reinforcing core made of a metallic material. As a special feature, the bearing plug has two annular grooves, with one is arranged in the middle of the bearing plug to accommodate a sealing ring and the other inside the valve housing behind the inner one Edge of the eccentric introduction. The second groove is used to hold one Snap ring and secures the eccentric against unintentional pulling out.

Another embodiment of the eccentric looks like a steel wire curved eccentric, which is inserted into a guide bush on the handle side and is stored in a bearing bush ängefortnten on the valve housing.

According to the invention it is proposed that this guide bushing consist of one rubber material is made and for the purpose of axial sealing useful in the guide hole as well as on the outer liner diameter Has sealing beads. Furthermore, this guide bushing has a claw edge on the inside of the valve. Assembly is therefore extremely easy and inexpensive to carry out.

Another feature of this invention is that it is in close proximity to the Eccentric guide arranged circumferential weld-on collar. This has the decisive advantage that the valve with a certain length in the Container can protrude, with which the overall length located outside the container wall can be kept extremely short and thus how described, only a small container retraction is necessary, which promotes the remaining emptying decisively.

Welding in the valve is easy using the mirror welding process and safe to do.

This simple embodiment reduces the outlay in terms of tool technology kept low for the required injection molds.

The embodiment of the invention is shown in the drawing. The arrangement shows:

Figure 1 - the outlet valve in a recess (6.1) of the liquid container (6) and the embodiment of the valve body (1) 'with the valve plate (2), the guide bush (U) and the eccentric (3).

Figure 2 - a side view of the outlet valve with the valve plate (2) and the eccentric guide (2Λ) arranged therein.

Figure 3 = ■ a section of the outlet valve with the guide ribs (2.1, 2.2) and the guide grooves 41. $) ^

Figure k - the guide bush (h) with the inner guide hole (I4.I), the outer circumference of the bushing (k.2), the sealing beads (k.3) and the claw edge (k.k).

Figure 5 - Front view of the outlet valve with an eccentric (3) and eccentric handle (3 * 3) produced by injection molding

F ¹ IgUr 6 - side view of the outlet valve with eccentric (3 * 7), which is mounted in the eccentric inlet (1.2) and bearing bush (1.1).

Figure 7 - the design of the bearing plug (3-k) on the eccentric (3-7) with a metallic reinforcing core (3.8), the sealing groove (3-5) for the sealing ring (3.11), and the groove (3.6) to accommodate the snap ring (3.10).

Figure 8 - the top view of the bearing plug (3.k) with the preferred metal reinforcing core (3.3) executed with a square cross-section.

Outlet valves of this embodiment of the invention are deepest Point arranged by container containers. As Figure 1 shows, these have rectangular plastic containers (G) in their basic shape For manufacturing reasons, strongly rounded corners and edges. The drawing-in (6.1) of the container wall can be seen from FIG (6) as well as their round edge course on the lower circumferential container edge (6.2). It becomes clear how important it is to have the shortest possible length of the outlet valve outside the recess (6.1). The one behind The dead space resulting from the drawing-in (6.1) must be kept as small as possible. According to the invention, this is achieved in that a circumferential weld-on collar (1.5) is arranged on the valve body (1) in the immediate vicinity of the eccentric inlet (h). This makes it possible that part of the length of the valve (1) can protrude into the interior of the container.

The function of the outlet valve can also be seen in FIG. The eccentric (3) made in one piece from a steel wire is introduced into the valve body (1) through the insertion opening (1.2). The eccentric bracket (3.1) is guided into the eccentric guide (2.U) of the valve disk (2) and the eccentric axis (3.2) into the bearing bush (1Λ). Then the guide bush (U) is pressed into the insertion opening (1.2), whereby the claw edge ^ .4 ^ prevents unintentional slipping out.

FIG. 2 illustrates the arcuate course of the eccentric bracket I.

(3.1) in the eccentric guide (2.U) around the center of the eccentric axis P.

(3.2). In the end position of the closing point, the eccentric guide (2.U) h

continued beyond the central axis (M), whereby the eccentric bracket f

(3.1) is brought into self-holding. §

Unintentional opening z. B. by vibration is thereby prevented ! changes, because when opening the dead f

point must be overcome. ,

Occurring transverse forces that are spread over the eccentric guide (2.UJ on the Valve plate (2) transferred are caught by two guide ribs (2.1, 2.2) offset by 90 °. The ribs (2.2) run in Guide grooves (1.6) and prevent the valve disk (2) from rotating. The rubber-elastic sealing ring (S) is held in the annular groove (2.3) and seals in an axial and radial sealing ring surface (1.3, 1.U). This also prevents the valve from being opened by a slight and unintentional opening movement of the valve lever (3) can.

The further embodiment according to the invention of the eccentric (3.7) produced by the injection molding process can be seen from FIGS. A reinforcing core (3.3) bent from a metallic material in accordance with the eccentric shape is overmolded with plastic, with the bearing plug (3.U) being molded in one piece with it. This bearing plug (3.U) has a sealing groove (3 * 5) to accommodate the sealing ring (3.11) and an I.

Groove (3.6) for the snap ring (3.10)., Which is preferably also like the f

Beäteht sealing ring (3.11) made of a rubber elastic material. \

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The arrangement of the groove (3.S) is chosen so that it is behind the Insertion opening (1.2) comes to lie on the inside of the housing. If the eccentric (3.7) through the insertion opening (1.2J, the eccentric guide (2JJ and inserted into the bearing bush (1.1), the snap ring (3.10) snaps behind the inner edge of the Εύη guide opening (1.2) shortly before reaching the end position, thus locking the eccentric and securing it against unintentional pulling out.

So that the torque required for opening and closing is forceful can be transferred to the eccentric (3.7), as shown in FIGS. 7 and 8, the reinforcing core (3.3) has a rectangular cross section.

Claims (1)

Drain valve made of plastic for liquid containers, characterized in that an eccentric (3) with its eccentric bracket (3.1) in an eccentric guide (2Λ) of a valve disk (2) arranged perpendicular to the eccentric axis (3.2) and that the eccentric (3) is mounted with its eccentric axis (3.2) on the handle side in an eccentric inlet (1.2) and on the opposite side in a bearing bush (1.1). ... according to claim 1, characterized in that the plastic manufactured eccentric (3) has a reinforcing core (3.3) made of metallic material and that the bearing plug (3.U) on the eccentric (3) is integrally formed, a sealing groove (3.5) and one towards the inside of the housing, behind the eccentric inlet (1.2), a Has groove (3.6) for receiving a snap ring. 3, ... according to claim 1, characterized in that the one Eccentric (3) made in one piece from steel wire material on the handle side is mounted in a guide bush (U). U. ... according to claims 1 and 3, characterized in that the guide bushing (if), which is made of a semi-elastic material, has sealing beads (U. 3) and a collar (U.5) arranged outside the valve housing and a locking lip ^ 4-4f ^ behind the eccentric inlet (1.2) towards the inside of the housing. 5. ... according to claim 1 and 3, characterized in that the valve plate (2) has guide ribs (2.1 and 2.2), that these are arranged 90 to one another and that the guide rib (2.2) slide in guide grooves (1.6). G. ... according to claim 1 and 3, characterized in that the length the eccentric guide (2.U) for the eccentric bracket (3.1) is designed in the closed position beyond the central axis (M). f '> I I ■ ill I · · III • e » 1 »ι 111 I. 111) I. 111 1 I I I I »1 Ml I 7 · ... according to claims 1 and 3, characterized in that the seal ring (5) held in the valve disk (2) in an annular groove (2.3) is immersed in an axial and radial sealing ring surface (1.3, 1.U) of the valve body (1). S. ··· according to claims 1 and 3, characterized in that the valve body (1) in close proximity to the eccentric introduction (1.2) and Has a circumferential weld-on collar (1.5) on the valve disk side. | ι "ι ~ = <'· - ι ial i nil »ιιιι'ΤΊι ir ■ nTTTTrYrTrMTirrirriiniTniiiw—»