DE3442700A1 - Plastic outlet valve for liquid containers - Google Patents

Abstract

The invention relates to a plastic outlet valve for liquid containers in which a valve disc is moved in an opening and closing manner via a cam connected to a handle, and the actual sealing surface of the valve disc is located in the interior of the container so that a short overall length of the valve outside the container is thereby made possible.

Description

Patent description:

for Mr. Helmhold Schneider, Petersbachweg 1, 5230 Altenkirchen Designation: Plastic drain valve for liquid containers Description: The invention refers to a plastic drain valve for liquid containers, at which a valve disk is actuated by means of an eccentric.

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

So an embodiment is known in which one on an eccentric axis Eccentric disk is attached, which in turn is in an eccentric guide of a valve disk slides. Another disadvantage of this type of construction is that this construction for eccentric disk, eccentric guide and eccentric axis within the flow cross-section takes up a lot of space and thus the outflow speed of the media is considerable decreased.

There are also valves with rotary flaps and spindle-operated valve poppets known, which are mainly attached to disposable container containers. Here In addition to perfect functioning, the overall length is as short as possible at. Since the valves must not protrude beyond the external dimensions of the container, is it is necessary to create corresponding indentations in the container walls for the valve arrangement to be provided. However, this 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 a few percent remain in the containers. This is the case with expensive products a not inconsiderable loss.

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

In previously known embodiments, the valve housings are 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 finish at the welding point.

The invention is based on the object of designing a valve so that there is a short overall length outside of the container, which means that residues can be emptied easily is made possible. Furthermore, the valve should consist of a few components, i. H. Consequently inexpensive to manufacture, easy to assemble and easy to 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 on the handle side with an eccentric entry and opposite stored in a bearing bush formed on the valve housing. When turning of the eccentric, the eccentric bracket describes a semicircular shape in the eccentric guide Movement, whereby the valve disc 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, an eccentric to be produced by injection molding is shown, a bearing plug is formed on the handle side and the one made of a metallic one Material made reinforcing core possesses. The bearing plug is a special feature two annular grooves, one of which is arranged in the middle of the bearing plug for receiving one sealing ring and the other inside the valve housing behind the inner one Edge of the eccentric entry. The second groove is used to hold a snap ring and secures the eccentric against accidental pulling out.

Another embodiment of the eccentric sees one made from a steel wire curved eccentric in front, the handle side in a guide bush and opposite in a bearing bush integrally formed on the valve housing is supported.

According to the invention it is proposed that this guide bush consists of a There is rubber-elastic material and useful for the purpose of axial sealing has sealing beads in the guide bore as well as on the outer bush diameter. Furthermore, this guide bush has a claw edge on the inside of the valve. The assembly is therefore extremely simple and inexpensive to carry out.

Another feature of this establishment is that it is in the immediate vicinity circumferential weld-on collar arranged around the eccentric guide. This has the crucial The advantage that the valve protrudes into the container with a certain length can, which means that the overall length located outside the container wall is extremely short can be held and thus, as described, only a small container retraction becomes necessary, which decisively favors the emptying of the residue.

The valve is welded in using mirror white easy and safe to do.

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

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 disc (2), the guide bush (4) and the eccentric (3).

Figure 2 - a side view of the outlet valve with the valve plate (2) and the eccentric guide (2.4) arranged therein.

Figure 3 - a section of the outlet valve with the guide ribs (2.1, 2.2) and the guide grooves (1.6).

Figure 4 - the guide bushing (4) with the inner guide hole (4.1), the outer circumference of the bushing (4.2), the sealing beads (4.3) and the claw edge (4.4).

Figure 5 - front view of the outlet valve with an injection molding process manufactured eccentric (3) and eccentric handle (3.9).

Figure 6 - side view of the outlet valve with eccentric (3.7), the is stored in the eccentric introduction (1.2) and bearing bush (1.1).

Figure 7 - the execution of the bearing pot (3.4) on the eccentric (3.7) with metallic / reinforcement core (3.8) the sealing groove (3.5) for sealing ring (3.11), and the groove (3.6) for receiving the snap ring (3.10).

Figure 8 - the top view of the bearing plug (3.4) with the preferred metal reinforcing core (3.3) executed with a square cross-section.

Outlet valves of this A embodiment according to the invention are on lowest point of container containers arranged. As Figure 1 shows, have these in the basic shape rectangular plastic container (6) from manufacturing engineering Green strongly rounded corners and edges. From the figure 1 can be seen Retraction (6.1) of the container wall (6) and its ruder edge course on the lower circumferential container edge (6.2). It becomes clear how important one is as possible short overall length of the outlet valve outside of the retraction (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 on the valve body (1) in the immediate A circumferential weld-on collar (1.5) is arranged near the eccentric introduction 4). This makes it possible that the valve (1) with a partial length into the interior of the container can protrude.

The function of the outlet valve can also be seen in FIG.

The wi, riL manufactured in one piece from a steel wire through the Insertion opening (1.2) introduced into the valve body (1). The eccentric bracket (3.1) is carried out into the eccentric guide (2.4) of the valve disk (2) and the eccentric axis (3.2) in the bearing bush (1.1) Then the guide bush (4) pressed into the insertion opening (1.2), whereby the claw edge (4.4) prevents accidental slipping.

Figure 2 - illustrates the circular curve of the eccentric bracket (3.1) in the eccentric guide (2.4) around the center of the eccentric axis (3.2). In the end position of the closing point, the eccentric guide (2.4) is over the central axis (MJ continued, whereby the eccentric bracket (3.1; brought into self-retention will.

Unintentional opening z. B. by vibration is thereby prevented because when opening the dead center is first due to a certain amount of force must be overcome.

Occurring transverse forces that are caused by the eccentric guide (2.4) the valve disc (2) are transferred by two offset by 90 ° Guide ribs (2.1, 2.2) collected. The ribs (2.2) run in guide grooves (1.6) and prevent the valve disk from twisting (2J. The rubber-elastic sealing ring (5) is held in the annular groove (2.3) and seals in an axial and radial direction Sealing ring surface (1.3, 1.4). This also prevents a minor and unintentional opening movement of the valve lever (3) the valve can be opened.

The further embodiment of the invention in the injection molding process The eccentric (3.7) produced can be seen from FIGS. 5 and 6.

One made of a metallic material according to the eccentric shape bent reinforcing core (3.3) is overmolded with plastic, with the bearing plug (3.4) is molded in one piece with. This bearing plug (3.4) has a sealing groove (3.5) to accommodate the sealing ring (3.11) and a groove (3.6) for the snap ring (3.10)., Which, like the sealing ring (3.11), is preferably made of a rubber-elastic Material.

The arrangement of the groove (3.6) is chosen so that it is behind the entry opening to the inside of the housing comes to lie.

If the eccentric (3.7) through the insertion opening (1.2), the eccentric guide (2.4) and inserted into the bearing bush (1.1), so the snap ring (3.10) snaps shortly before reaching the end position behind the inner edge of the inlet opening (1.2) and thus locks the eccentric and secures it against unintentional pulling out.

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

L e r s e i t e

Claims (8)

Claims 1. Drain valve made of plastic for liquid containers, characterized in that an eccentric (3) with its eccentric bracket (3.1) in one eccentric guide (2.4) of a t'entilteller arranged perpendicular to the eccentric axis (3.2) (2) slides and that the eccentric f3) with its eccentric axis (3.2) is on the handle side in an eccentric lead-in (1.2) and on the opposite side in one Bearing bush (1.1) is stored. 2. Drain valve made of plastic for liquid containers according to claim 1 gekennzeicnet that the eccentric (3) made of plastic has a "reinforcement core (3.3) made of metallic material and that the bearing plug (3.4) on the eccentric (3) is integrally formed, a sealing groove (3.5) and one towards the interior of the housing he arranged the eccentric introduction (1.2), a groove (3.6), ur receiving a snap ring owns. 3. Drain valve made of plastic for liquid containers according to claim 1, thereby gekennze.chnet that the one-piece manufactured from a steel wire material Eccentric (3) on the handle side in a guide bushing (4J). 4. Drain valve made of plastic for liquid containers, according to claim j and 3, characterized in that the guide bush (4), which consists of a semi-elastic Material is made on its inner guide bore (4.1) and outer sockets around (4.2) sealing beads (4.3) and arranged outside the valve housing eir; en collar (4.5) and behind the eccentric entry (1.2) towards the inside of the housing has a locking lip (4.4). 5. Plastic drain valve for liquid containers according to claim 1 and 3, characterized in that the valve plate (2) guide ribs (2.1 and 2.2) has that these 900 are arranged to one another and that the guide rib (2.2) slide in guide grooves (1.6). 6. Drain valve made of plastic for liquid containers according to claim 1 and 3, characterized in that the length of the eccentric guide (2.4) for the The eccentric bracket (3.1) is carried out in the closed position beyond the central axis (M) is. 7. Plastic drain valve for liquid containers according to claim 1 and 3, characterized in that the sealing ring (5) in the valve disk (2) is held in an annular groove (2.3), in an axial and radial sealing ring surface (1.3, 1.4) of the valve body (1) is immersed. 8. Drain valve made of plastic for liquid containers, according to claim 1 and 3, characterized in that the valve body (1) in close proximity to Eccentric entry (1.2) and a circumferential weld-on collar on the valve disk side (1.5) possesses.