RU2774490C1 - Drain pipe for separate draining of fluids of different densities - Google Patents

Abstract

FIELD: drain pipes.

SUBSTANCE: invention relates to a drain pipe for separate draining of fluids of different densities, more specifically such as water and fuel. Drain pipe (1), having a cup-shaped body (2), which contains a base (3) and a wall (4), and outside on the wall (4) of the body there is a connecting geometric element (5) for installation in the opening of the container, and from the side ( 9) inlet to the side (10) of the outlet through the base (3) of the housing passes the inlet pipe (11) and between the inlet pipe (11) and the wall (4) of the housing there is an accumulation chamber (12), wherein the body (2) has a drain channel (13), which extends from the storage chamber (12) to the outlet side (10) and is made with the possibility of closing it from the outlet side (10). The inlet pipe (11) on the outlet side (10) passes into the outlet pipe (17), which at the outer end (18) has a non-return valve (19) that closes from the outside, has a body (20) and a seat (21) and is located on the side (10) release. The outlet pipe (17) at its outer end (18) has a first connecting geometric element (22), which can be connected to the pipe coupling (23) in a lockable manner. The check valve (19) is movable from the valve seat (21) to an open position, where it is spaced from said seat, by means of a profile element (27) protruding into the outer end (18).

EFFECT: providing a drain pipe that can be manufactured at low cost and that is light in weight.

9 cl, 4 dwg

Description

The invention relates to a drain pipe for separate draining of fluids of different densities, more specifically such as water and fuel, according to the restrictive part of claim 1 of the formula.

Such a drain pipe is used, for example, in fuel tanks to drain the water that collects in the base of the tank through the drain channel by opening a valve, which is optionally made in the form of a screw. At the same time, therefore, the drain pipe ensures the release of fuel, which is continuously withdrawn during operation. For maintenance operations, however, it may also be necessary to close the fuel outlet. To this end, it has been proposed in the prior art to connect a valve to the outlet of a drain pipe, with said valve connected to an outlet pipe, which has a connecting geometric element for connection with other pipes.

Thus, such drains are made from a relatively large number of separate parts, with at least the valve being substantially made of metal to be sufficiently strong. Thus, the drain pipes known in the prior art are, firstly, relatively heavy, and secondly, they can only be manufactured in a complex way and, therefore, at significant financial costs. In such a case, there is a risk of leaks due to the required connection points.

Therefore, the purpose of the present invention is to eliminate the disadvantages of the known solutions, as well as a drain pipe that can be produced cost-effectively, more specifically at low cost, and which has a low weight. It is also necessary to make the wrong work as difficult as possible.

The main features of the invention are indicated in the distinctive part of claim 1 of the formula. Embodiments of the invention are given in paragraphs. 2-9.

A drain branch pipe is proposed, having a cup-shaped body, which contains a base and a wall, and on the outside on the wall of the body there is a connecting geometric element for installation in the opening of the container, and from the inlet side to the outlet side, an inlet pipe passes through the base of the body, and between the inlet pipe and the wall the storage chamber is located in the housing, and the housing has a drain channel that extends from the storage chamber to the outlet side and is made with the possibility of closing it from the outlet side, while in the drain pipe the inlet pipe on the outlet side passes into the outlet pipe, which at the outer end has a closable on the outside, a check valve having a body and a seat located on the outlet side, as well as an outlet pipe at its outer end, has a first connecting geometric element, which can be connected to the pipe coupling in a lockable manner, and the check valve is movable from the valve seat ana to the open position, in which it is separated from the specified seat, by means of a profile element protruding into the outer end.

As a result, draining the outlet pipe through the inlet pipe is only possible when the check valve is open. The valve can be opened by pushing the valve body towards the inlet pipe. For example, the profile element is inserted into the outlet pipe, while the specified profile element abuts against the valve body and rises in the direction from the valve seat by moving in the direction of the inlet pipe. As a result, for example, an annular flow section is opened between the valve body and the valve seat, through which the liquid flows. As a result, the liquid can be drained from the container through the outlet pipe when the drain pipe is screwed into the opening of the container.

In such a case, only a liquid having a lower density, such as fuel, is discharged through the outlet pipe. However, this drain may allow a liquid having a higher density, such as water, to be drained through a drain channel that is separate and closable. As a result, this drain provides a solution for separate draining of two fluids of different densities, such as water and fuel. Due to the simplicity of the design, this drain pipe can be made of plastic as a single unit, with the exception of the valve body and possible sealing elements. Compared to existing solutions, manufacturing is greatly simplified, and the use of plastic contributes to a reduction in weight. In addition, the drain pipe made in this way does not tend to oxidize and is therefore particularly suitable for installation in an automobile vehicle, namely a passenger vehicle, truck, agricultural machinery or the like. Additionally, the integrity of the connections between the individual elements of the drain pipe can be ensured, which improves the tightness of the drain pipe.

The drain channel made with the possibility of closing can be closed with a closing element, for example a plug. To this end, the drain channel and the closure element may have a shape that is responsive to each other, so that the closure element can be easily removed and inserted. The closing element is preferably made of a material which is selected according to the material of the drain pipe. More specifically, the closure element is also preferably made of plastic material due to its positive properties in terms of weight and manufacturing cost. However, this plastic may also differ in terms of its properties from the plastic used for the drain. The closing element can also be made in one piece.

The inlet pipe preferably extends on the inlet side and its main longitudinal axis is located above the connecting geometric element. As a result, the inlet pipe can only receive a liquid having a lower density, while a liquid having a higher density can only be discharged through a drain channel located below the inlet pipe inlet, said drain channel being opened into the base of the housing. As a result, by using this drain pipe in the fuel tank, water is reliably prevented from entering the fuel-fed engine.

In an advantageous embodiment, there is also a separate pipe coupling having a second connecting geometric element, which has a shape corresponding to the first connecting geometric element, and the profile element is located on the pipe coupling and extends at least in the area of the second connecting geometric element. Opening and closing of the outlet pipe can be accomplished by simply attaching or detaching a pipe coupling at the outer end of the outlet pipe. If the pipe coupling is connected by means of its second connecting geometric element to the first connecting geometric element, the profile element extends into the outlet pipe and pushes the valve body from the valve seat further into the outlet pipe. Thus, the outlet pipe opens and liquid can flow out of it. When the pipe coupling is disconnected, the non-return valve closes again by gravity and no more liquid can flow out of the outlet pipe.

Preferably, the pipe coupling has a first axial end, on which the second connecting geometric element is located, and a second axial end, wherein at least one flow holder is located between the two axial ends and the profile element extends from said at least one holder in the direction of the first axial end . As a result, the profile element can preferably be held within the flow section. Particularly preferably, this profile element is thus held centrally in the flow section, so that the force exerted by the profile element acts centrally on the valve body. As a result, tilting of the valve body can be prevented. In order not to interfere with throughflow from the outlet pipe, the holder is configured to allow flow to pass through and as a result has one or more cutouts or holes. The holder can be made, for example, in the form of a grid or a sieve.

In an advantageous embodiment, the flow holder has at least one rib which extends in the radial direction and to which the profile element is attached. The specified at least one rib can be made in the form of a group of ribs that jointly hold the profile element. As a result, the profile element is held firmly and securely, so that the non-return valve always remains open when the pipe coupling is installed. It is particularly advantageous when, when using a group of ribs, these ribs are distributed symmetrically over the flow section.

The profile element contains a pin extending in the axial direction in the pipe coupling, or may be shaped accordingly. As a result, the profile element has a thin design that can extend in the axial direction and the flow area of the pipe coupling remains practically unaffected. In addition, it is relatively easy to align the profile element with an appropriately shaped valve body element.

In addition, on the outwardly directed side of the valve body, there may be a recess, the shape of which is responsive to the profile element. The recess provides an accurate fit when the valve body is moved by the profile element when both elements are connected to each other. Thus, reliably obtaining the desired degree of opening of the check valve does not depend on the outer surface of the valve body, but only on the recess. Therefore, the manufacture of the valve body can be simplified.

The pipe coupling is advantageously designed as a plug-in connector with an integrated holding clip. Detaching and attaching the pipe coupling is thus greatly simplified compared to screw couplings, since the pipe coupling only needs to be inserted and secured with a retaining clip to attach the pipe coupling. Accordingly, the disconnection of the pipe coupling is performed by moving the retaining clip and the recess of the pipe coupling in opposite directions. In combination with the use of a non-return valve, a particularly simple procedure for draining liquids having a higher density from the drain channel can be provided.

Preferably, the inlet pipe and the outlet pipe are arranged coaxially with each other. Thus, the drain pipe has a simpler and more compact design and the flow from the inlet pipe to the outlet pipe is not disturbed by projections, bends or other form features.

The drain channel can advantageously be disposed radially outside the inlet pipe and the outlet pipe. In this way, the ability to access and manipulate the drain channel to open and close the drain channel can be improved.

Other features, details and advantages of the invention follow from the claims, as well as from the following description of exemplary embodiments with reference to the drawings, in which:

Fig. 1 is a sectional view of the drain pipe,

Fig. 2 is a three-dimensional view of the pipe coupling,

Fig. 3 is a side view of the pipe coupling,

Fig. 4 is a side view of the drain pipe.

Fig. 1 is a sectional view of a drain 1 that can be inserted into the opening of a container (not shown) to allow fluids of different densities to be drained separately from each other. The drain pipe 1 contains a cup-shaped body 2 having a base 3 and a wall 4. The connecting geometric element 5 in the form of an external thread is placed on the outer surface of the wall 4 of the body. As a result, the drain pipe 1 can be screwed in a hermetically sealed manner into the opening of the suitably shaped container until the stop 6 extends radially outward. In the area of the abutment 6 there is a circumferential groove 7 in which a sealing ring 8 is placed in order to provide a seal in the opening of the container.

The body base 3 can form a separating plane for separating the drain pipe into an inlet side 9 and an outlet side 10. In such a case, the inlet side 9 is located inside the respective container and the outlet side 10 is accessible to the user.

Drain pipe 1, for example, contains a rectangular hollow inlet pipe 11 of cylindrical shape, which extends from the area near the base 3 of the housing further out of the housing 2 towards the side 9 of the inlet. The accumulation chamber 12 is formed inside the housing 2, between the inlet pipe 11 and the wall 4 of the housing, the liquid having a higher density is collected in said storage chamber and flows out into the drain channel 13, which is radially outside and at an angle attached to the base 3 of the housing. As a result, water that accumulates in, for example, a fuel tank can be drained through the overflow channel 13. Thus, fuel can be prevented from being discharged at the same time. The drain channel 13 is closed, for example, by a plug 14. This plug contains, for example, O-rings 15 and 16 to ensure a permanent hermetic closure.

During normal operation of the drain pipe 1, for example for supplying fuel from a fuel tank, there is an outlet pipe 17. The outlet pipe 17 is located coaxially with the inlet pipe 13, for example. At the outer end 18 said outlet pipe comprises a check valve 19 having a body 20 and a seat 21 of an appropriate shape, for example annular. In the view shown in the drawing, the valve body 20 is located in the valve seat 21 and thereby closes the exhaust pipe 17. The valve body 20 can be pressed against the valve seat 21 by the static pressure created by the filling volume of the fuel tank. By pressing the valve body 20 in the opposite direction into the exhaust pipe 17 and moving it away from the valve seat 21, the valve seat 21 is released and fuel can flow from the intake pipe 11 through the exhaust pipe 17.

The outlet pipe 17 has a first connecting geometric element 22 which is configured to interlock with the pipe coupling 23 shown in FIG. The first connection geometry 22 may, for example, have a circumferential groove 24 into which a retaining clip 25 can be inserted for attaching the pipe socket 23 respectively to the outlet pipe 17. It goes without saying that the pipe socket 23 has a second connection geometry 26 which has the shape corresponding to the first connecting geometric element 22.

The sleeve 23 also includes a profile element 27 shaped to match the outward recess 28 of the valve body 2 . When the sleeve 23 is placed on the outlet pipe 17, the profile member 27 extends into the recess 28, abuts against the profile member of the recess 28 or the surrounding area of the valve body 20, and then pushes the valve body 20 further into the outlet pipe 17. As a result, by fully attaching pipe coupling 23 to the outlet pipe 17, the non-return valve 19 immediately opens.

In the exemplary form shown, the profile element 27 is made, at least in some areas, in the form of a pin located on the flow holder 29. This holder has, for example, three ribs 29a that extend in the radial direction and which are fixed inside the pipe coupling 23. The ribs 29a are thin and roughly rod-shaped so that a fairly open flow profile remains. For example, the profile element 27 is located in the center of the pipe coupling 23 and the recess 28 is located in the center of the valve body 20. The pipe coupling 23 has a first axial end 30, on which the second connecting geometric element 26 is located. The second axial end 31 is located opposite the first axial end 30. The profile element 27 is located between the two axial ends 30 and 31 and in this case extends in the axial direction.

All elements shown may be made of plastic. In this case, the drain pipe 1 can be made essentially in one piece, and to accommodate the check valve 19, the outlet pipe 17 can also have two parts 17a and 17b, which can be made separately from each other and which can be separated for placement and subsequent enclosing the valve body 20 in them. The retaining clip 25 of the pipe coupling 23 can also be made of metal to provide a high level of strength even with rough handling.

For completeness, the elements shown in Figures 1 and 2 are shown in other views in Figures 3 and 4. FIG. 3 shows a pipe coupling 23 where the first axial end 30 is located at the top of the drawing plane and the second axial end 31 is located at the bottom. The second axial end may have a ribbed side surface 32 for the connection of a hose or the like.

Fig. 4 shows the appearance of the drain pipe 1 without the pipe coupling 23 attached to it.

The present invention is not limited to one of the embodiments described above, and can be modified in various ways.

All features and advantages arising from the claims, description and drawings, including construction details, spatial arrangement and method steps, may be essential for the invention both individually and in various combinations thereof.

Item Number List

1 drain pipe

2 Corps

3 Housing base

4 Housing wall

5 Connecting geometric element

6 Stop

7 Groove

8 O-ring

9 Inlet side

10 Outlet side

11 Inlet pipe

12 Collection chamber

13 Drain channel

14 Closing element

15 O-ring

16 O-ring

17 Outlet pipe

17a Part of the pipe

17b Pipe section

18 Outer end

19 Check valve

20 Valve body

21 Valve seat

22 First connecting geometric element

23 Pipe coupling

24 Groove

25 Retaining clamp

26 Second connecting geometric element

27 profile element

28 Recess

29 Holder

29a Rib

30 First axial end

31 Second axial end

32 Side surface

Claims (9)

1. A drain pipe (1) having a bowl-shaped body (2) that contains a base (3) and a wall (4), and on the outside on the wall (4) of the body there is a connecting geometric element (5) for installation in the opening of the container, and from side (9) of the inlet to the side (10) of the outlet through the base (3) of the housing passes the inlet pipe (11) and between the inlet pipe (11) and the wall (4) of the housing there is an accumulation chamber (12), and the housing (2) has a drain channel (13), which passes from the storage chamber (12) to the outlet side (10) and is made with the possibility of closing it from the outlet side (10), characterized in that the inlet pipe (11) on the outlet side (10) passes into the outlet pipe (17), which at the outer end (18) has a non-return valve (19) closing from the outside, having a body (20) and a seat (21) and located on the side (10) of the outlet, and the outlet pipe (17) at its outer end (18) has a first connecting geometric element (22), which can be provided is connected to the pipe coupling (23) by means of blocking, while the check valve (19) is made with the possibility of moving from the valve seat (21) to the open position, in which it is spaced from the specified seat, with the help of a profile element (27) protruding into the outer end (18). 2. Drain pipe (1) according to claim 1, characterized in that it contains a separate pipe coupling (23) having a second connecting geometric element (26), which has a shape corresponding to the first connecting geometric element (22), and the profile element (27) is located on the pipe coupling (23) and protrudes at least into the area of the second connecting geometric element (26). 3. Drain pipe (1) according to claim 2, characterized in that the pipe coupling (23) has a first axial end (30), on which the second geometric connecting element (26) is located, and a second axial end (31), and between at least one flow holder (29) is located at said two axial ends (30, 31), and the profile element (27) extends from said at least one holder (29) in the direction of the first axial end (30). 4. Drain pipe (1) according to claim 3, characterized in that the flow holder (29) has at least one rib (29a) which extends in the radial direction and to which the profile element (27) is attached. 5. Drain pipe (1) according to any one of paragraphs. 2-4, characterized in that the profile element (27) contains a pin passing in the axial direction in the pipe coupling (23), or has a corresponding shape. 6. Drain pipe (1) according to any of the preceding claims, characterized in that on the outwardly directed side of the valve body (20) there is a recess (28), the shape of which is a response to the profile element (27). 7. Drain pipe (1) according to any one of paragraphs. 2-5, characterized in that the pipe coupling (23) is made in the form of a plug-in connector with an integrated holding clip (25). 8. Drain pipe (1) according to any one of the previous claims, characterized in that the inlet pipe (11) and the outlet pipe (17) are located coaxially to each other. 9. Drain pipe (1) according to any of the previous claims, characterized in that the drain channel (13) is located radially outside the inlet pipe (11) and outlet pipe (17).

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