EP4065508A1

EP4065508A1 - Filling valve with leakage protection device

Info

Publication number: EP4065508A1
Application number: EP20804592.2A
Authority: EP
Inventors: Lasse Schulz-Hildebrandt; Sebastian Viets
Original assignee: Elaflex Hiby GmbH and Co KG
Current assignee: Elaflex Hiby GmbH and Co KG
Priority date: 2019-11-29
Filing date: 2020-11-18
Publication date: 2022-10-05
Anticipated expiration: 2040-11-18
Also published as: MX2022006492A; EP4163249B1; CN114746359A; PL4065508T3; PL4163249T3; US20230174367A1; AU2020393289A1; CN114746359B; CN116477554B; CA3156226A1; US20230018431A1; AR120586A1; PT4065508T; DK4065508T3; WO2021104961A1; CN116477554A; NZ788422A; US11999610B2; EP4163249A1; EP4065508B1

Abstract

The invention relates to a filling valve for dispensing a fluid, comprising an inlet opening for connecting to a fluid supply line, an outlet end (12) which lies opposite the inlet opening, a main valve for controlling the flow of the fluid through the filling valve, and a leakage protection valve (13) which is arranged downstream of the main valve, comprising a valve seat (14) and a valve body (15, 16) which can be moved into a closed position in an upstream direction. According to the invention, the valve body (15, 16) has a first sub-body (15) and a second sub-body (16) which is designed to be movable relative to the first sub-body, wherein a first fluid path (17) can be released by a movement of the first sub-body (15) in a downstream direction relative to the valve seat (14), and a second fluid path (18) can be released by a movement of the second sub-body (16) in a downstream direction relative to the first sub-body (15). By virtue of the two-part valve body according to the invention, the flow of fluid through the filling valve can be optimized and the back pressure accumulating in front of the leakage protection valve can be reduced.

Description

Nozzle valve with discharge protection device

The present invention relates to a nozzle for dispensing a fluid. The dispensing valve comprises an inlet opening for connection to a fluid supply line, an outlet end opposite the inlet opening, and a main valve for

Control of a fluid flow through the nozzle and an anti-leakage valve arranged downstream of the main valve. The leakage protection valve comprises a valve seat and a valve body which can be moved upstream into a closed position.

When fluids are dispensed by means of such a dispensing valve, residual quantities of the fluid usually remain within the dispensing valve after the dispensing process has ended, in particular after the main valve has been closed. Particularly with high viscosity fluids, a significant amount of the fluid can adhere to the inner walls of the nozzle. If the nozzle is tilted downwards on the outlet side, these residual amounts can run out, which is often undesirable. It is known to provide a leakage protection valve in order to prevent the remaining quantities of fluid from running out (see, for example, EP 2687 479 A1). The leakage protection valve is usually designed in such a way that it is opened by the pressure of the fluid flow when the main valve is opened.

A problem in the prior art is that the fluid flow is impaired by the leakage protection valve when the main valve is open. In particular, high back pressure and undesirable turbulence can occur at the leakage protection valve. Against this background, it is the object of the present invention to provide a nozzle in which the problems known from the prior art are less pronounced.

This object is achieved with the features of the independent claims. Advantageous embodiments are described in the dependent claims. According to the invention, the valve body has a first part body and a second part body which is designed to be movable relative to the first. A first fluid path can be released by a downstream movement of the first part body relative to the valve seat. A second fluid path can be released by a downstream movement of the second part body relative to the first part body.

First, some terms used in the context of the present description are explained. The leakage protection valve serves to prevent the leakage of residual quantities of the fluid which remain in the nozzle after closing the main valve downstream of the main valve. For this purpose, the valve body of the leakage protection valve can be held in the closed position by means of a holding force which is large enough to prevent the residual quantities from leaking out. However, the holding force is regularly so small that an opening pressure generated by the fluid flow when the main valve is open is sufficient to open the leakage protection valve.

The nozzle is preferred for dispensing liquids, in particular fuels such as gasoline or

Diesel trained. The terms “upstream” and “downstream” used in the context of the description relate to the main flow direction of the fluid, which is oriented from the inlet opening to the outlet end. Since the discharge valve according to the invention has a first part body and a second part body movable downstream relative thereto, the fluid flow can pass through the discharge discharge valve more evenly and stably, and the back pressure in front of the discharge discharge valve is also reduced.

In the context of the invention, it was recognized that in the prior art in front of the discharge valve, especially with large flow rates, a high back pressure often builds up, which mechanically heavily loaded the components within the nozzle and reduces the achievable flow through the nozzle. The second partial body according to the invention, which is designed to be movable relative to the first partial body, in addition to the first fluid path, which is opened by the movement of the first partial body relative to the valve seat, a second fluid path can be released, which allows an additional flow through the discharge valve . The second part of the body can also be moved relative to the first part of the body by the opening pressure which is generated by the fluid flow after the main valve is opened. In this way, the fluid flow passing through the nozzle can be divided into the first fluid path and the second fluid path, which overall leads to improved flow dynamics with increased throughput and lower back pressure in front of the discharge valve. The first fluid path can in particular lead past an inlet-side end of the first partial body on the outside, wherein the second fluid path can lead past the inlet-side end of the first partial body on the inside.

In a preferred embodiment, the first part body has at least one passage opening for the second fluid path, the passage opening being caused by the movement of the second Part of the body can be released relative to the first part of the body. Via the passage opening, the flow conveyed in front of the first part of the body can be merged with the flow conveyed along the outside, which leads to a further improvement in the flow dynamics.

Furthermore, the second partial body can aufwei sen a sealing surface for contact with a counter-sealing surface of the first partial body, the counter-sealing surface preferably forming a partial body valve seat for the first partial body. The passage opening of the first part of the body can in this case, in particular, be located downstream of the counter-sealing surface when the leakage protection valve is in the closed position. The sealing surface and the counter-sealing surface can ensure that the leakage protection valve locks securely in the closed position and the residual quantities of fluid are thus reliably prevented from leaking.

In a preferred embodiment, the sealing surface of the second part-body and the counter-sealing surface of the first part-body are at an angle between 60 ° and 120 °, preferably between 80 ° and 100 ° to an axial direction of the anti-leakage valve. More preferably, the sealing surface of the second part-body and the counter-sealing surface of the first part-body are essentially perpendicular to the axial direction of the leakage protection valve. If the axial direction of the leakage protection valve is essentially perpendicular to the sealing surfaces, a good sealing effect can be achieved in a simple manner. In addition, the sealing surface and the counter-sealing surface can preferably be designed in such a way that, in the closed position of the leakage protection valve, they rest essentially flat against one another. It is advantageous if the second partial body has a peripheral surface which is completely radially surrounded by the first partial body in the closed position of the anti-leakage valve. The second part body can in particular be arranged concentrically to the first part body. In this way, the second partial body can be guided safely within the first partial body, the counter-sealing surface of the first partial body being able to rest fully against the sealing surface of the second partial body in the closed position.

The second partial body preferably tapers in cross section starting from the sealing surface towards the inlet-side end.

It has been shown that a further improvement in the flow properties can be achieved in this way. In particular, an outer surface of the second partial body in the region of the taper can have a first section and a second section arranged upstream of the first, the first section being curved outwards and the second section being curved inwards. This curvature makes it possible to avoid turbulence in the second fluid path, especially when flowing past the sealing surface, whereby the flow can be further improved and the dynamic pressure can be further reduced.

In a preferred embodiment, at least one of the partial bodies can be slidably guided relative to the valve seat by means of a linear guide, the linear guide preferably having a shaft extending in the axial direction of the leakage protection valve, which is slidably guided through a through opening of the second partial body. The through-opening can extend centrally along an axial direction of the second partial body. The second part body can also be designed to be rotationally symmetrical relative to its axial direction. As an alternative or in addition, the linear guide can have a registration opening which is arranged rigidly relative to the valve seat and preferably extends in the axial direction of the leakage protection valve, through which a guide leg of the partial body is slidably guided. Furthermore, one of the sub-bodies can have at least one guide leg on which the respective other sub-body is slidably guided. With the above-described measures, the first and second sub-bodies can be safely guided along the axial direction of the leakage protection valve, so that a reliable closing effect to prevent the leakage of residual fluid and a reliable opening movement when the main valve is opened is ensured.

In a preferred embodiment, one of the sub-bodies is designed to take the other of the sub-bodies into the closed position when moving in the direction of the closed position. In particular, the second part body can be designed to take the first part body with it into the closed position when it moves in the direction of the closed position. With the acquisition of the first part of the body takes place in this case, preferably by a force transmission from the sealing surface of the second part of the body to the mating sealing surface of the first part of the body. This embodiment has the advantage that it is sufficient if the second part of the body is actively moved into the closed position. The first part of the body is then taken along without the need for an additional reset element. For this purpose, the nozzle valve can have a mechanical restoring element, for example a spring element, which is designed to urge the second partial body into the closed position.

In an advantageous embodiment, the second part of the body has a magnetic material, one upstream of the second partial body arranged counter magnetic body is provided, which is designed to hold the first and second partial body in the closed position of the leakage protection valve by magnetic interaction. The magnetic material can be a material that is attracted to a pole of an external magnetic field. In particular, the magnetic material can be a ferromagnetic material. The counter magnet body can be a permanent magnet. It is also possible that the magnetic material is designed as a permanent magnet and the opposing magnetic body is formed from a material that is attracted by a pole of an external magnetic field. The first part body is preferably formed from a non-magnetic material. Wei ter preferably also the magnetic material and the housing sections surrounding the counter magnetic body and / or an outlet pipe of the nozzle are formed from a non-magnetic mate rial. If the elements surrounding the magnetic material and the counter magnetic body are formed from a non-magnetic material, the magnetic interaction between the magnetic material and the counter magnetic body is not disturbed.

The second part body preferably has a maximum opening position which is located outside an effective area of the counter magnetic body, so that the second part body remains in an open position after a fluid discharge has ended, the second part body being movable back into the effective area using gravity, within which it is pulled into the closed position by the counter magnet body when the nozzle tends upward on the outlet side. An angle of inclination of the axial direction of the leakage protection valve relative to the vertical can, for example, be between 0 ° and 110 °, preferably between see 0 ° and 90 °, more preferably between 0 ° and 70 ° be wear, where an angle of 0 ° means an orientation in the flow direction vertically downwards. If the second part of the body assumes the maximum open position during a fluid delivery, it remains in the open position due to this configuration after the end of the fluid delivery without the second part of the body moving in the direction of the closed position automatically caused by the magnetic force. When refueling a motor vehicle, for example, in which an outlet-side end of the Zapfven valve is inserted into a filler neck with a downward incline, this means that residual quantities of fluid that remain inside the nozzle can initially run out into the tank. This prevents residual amounts of fluid that have already passed through the main valve from remaining in volumes of the nozzle downstream of the main valve and thus the amount of fluid recorded by a calibrated fluid meter deviating from the amount of fluid actually dispensed in a manner relevant to calibration law.

Only when the nozzle is lifted on the outlet side, for example in such a way that the axial direction of the anti-drip valve assumes an angle to the vertical between 95 ° and 180 °, preferably between 95 ° and 160 °, more preferably between 95 ° and 140 °, can the second Partial body (by decreasing the downhill force acting towards the outlet end or by action of a downward slope force directed towards the inlet end) return to the effective area of the counter magnetic body, within which it is pulled into the closed position with the first partial body being carried along. Such a lifting ge usually happens anyway when removing the Zapfven valve from a filler neck, so that a secure closure of the leakage protection valve is guaranteed. In an advantageous embodiment, the leakage protection valve is arranged at an inlet end of an outlet pipe of the Zapfven valve. In the context of the invention, it was recognized that, especially with fluids with low viscosity, only small amounts of fluid remain in the outlet pipe, so that an arrangement at the inlet end of the outlet pipe is sufficient both from the point of view of calibration law and with regard to effective drip protection. At the same time, it has been shown that more installation space is available for the leakage protection valve at the inlet end of the outlet pipe and the arrangement at the inlet end can therefore be implemented in a structurally simpler manner.

The invention also relates to a nozzle for dispensing a fluid, comprising an inlet opening for connec tion with a fluid supply line, an outlet end opposite the inlet opening and a main valve for controlling the fluid flow through the nozzle. The nozzle includes a Fühlerlei device extending to the outlet end, which is in operative connection with an automatic disconnection device, the sensor line being subjected to a vacuum during the fluid discharge, so that a gas flow can be sucked in via the end of the sensor line.

Such automatic shutdown devices, which cause the main valve to close automatically when a liquid reaches or exceeds the end of the sensor line, are generally known from the prior art (see, for example, EP 2386 520 A1). So far, however, it has been completely neglected in the prior art that a certain amount of fluid enters the sensor line when the liquid level reaches the end of the sensor line due to the vacuum required to operate the automatic shutdown device. The amount of fluid entered could therefore in the prior art according to the Fluid discharge runs out of the sensor line again in an uncontrolled manner.

Against this background, it is an object of the present invention to at least partially avoid the disadvantage described above. This object is achieved with the features of claim 14. Advantageous embodiments are described in claims 15 and 16.

According to the invention, the sensor line has an end region in which a sensor line valve designed to close the sensor line is arranged, which valve can be moved into an open position by means of the gas flow sucked in through the sensor line.

The sensor line can be closed by the sensor line valve according to the invention and an undesired leakage of this amount of fluid can be prevented, and the amount of fluid entering can also be slightly reduced. In one embodiment, the sensor line valve can be preloaded into the closed position by a restoring element.

This measure can further reduce the undesired leakage of the aforementioned amount of fluid. The aforementioned restoring element is preferably dimensioned in such a way that the sensor line valve is moved into the open position during the discharge of the fluid by the resulting gas flow. The functionality of the automatic shutdown device is not impaired in any way.

In an advantageous embodiment, the sensor line valve is designed to be moved into the closed position by inclining the nozzle on the outlet side downwards (using gravity). The idea of arranging a sensor line valve as described above in the end region of a sensor line and the more detailed embodiments of this idea described below have independent inventive content.

In a preferred embodiment, the sensor line valve has a valve seat and a valve body which is arranged movably upstream of the valve seat within the sensor line so that the valve body can be moved downward into the valve seat on the outlet side by a tilt of the nozzle and by a Inclination of the nozzle from the running side can be moved upward out of the valve seat. The valve body can be designed, for example, spherical. As a result of this configuration, the sensor line valve in the sensor line can be implemented in a particularly simple and thus inexpensive manner.

During refueling, the valve body is moved out of the valve seat due to the vacuum (possibly against gravity). As soon as the liquid level reaches the end of the Füh lerleitung, there is an automatic shutdown, no more gas is sucked in, so that the valve body falls back into the valve seat. During the time required for the shutdown process, small amounts of the fluid can get into the sensor line. If the end of the nozzle is then tilted upwards, for example when hanging the nozzle in a fuel pump, the valve body falls out of the valve so that the sensor line is opened and any residual fluid that may be present can evaporate.

The invention also relates to an outlet pipe for a nozzle for dispensing a fluid, comprising an inlet end that can be connected to a housing of the nozzle, a lassende opposite outlet end, and a leakage protection valve with a valve seat and a valve body movable upstream into a closed position, characterized in that the valve body has a first part body and a second part body designed to be movable relative to the first, whereby a downstream movement of the First part of the body relative to the valve seat of the leakage protection valve, a first fluid path can be released and a second fluid path can be released by a downstream movement of the second part of the body relative to the first part of the body, the leakage protection valve preferably being arranged at the inlet end of the outlet pipe.

The outlet pipe according to the invention can be developed by further features which have already been described in connection with the nozzle according to the invention.

Advantageous embodiments are explained by way of example with reference to the accompanying drawings. Show it:

FIG. 1: a nozzle according to the invention in a cross-sectional view;

FIG. 2: the outlet pipe according to the invention of the nozzle of FIG. 1 in an enlarged view;

FIG. 3: an enlarged view of that shown in FIG

Anti-leak valve in a closed position;

FIG. 4: an enlarged view of that shown in FIG

Anti-leak valve in an open position;

Figure 5: a further cross-sectional view of the leakage protection valve of the nozzle according to the invention; FIG. 6: a sectional view along the line AA shown in FIG. 5;

FIG. 7: a sectional view along the line B-B shown in FIG. 5;

FIG. 8: an enlarged view of that shown in FIG

Sensor line valve in a closed position;

FIG. 9: an enlarged view of that shown in FIG

Sensor line valve in an open position with the outlet pipe inclined downwards during the fluid delivery;

FIG. 10: an enlarged view of that shown in FIG

Sensor line valve in an open position, closed position with an upwardly inclined outlet pipe;

FIG. 11: a gray scale sketch to illustrate the fluid pressure prevailing inside the nozzle in the area of the leakage protection valve

FIG. 12: a leakage protection valve of an alternative nozzle according to the invention in a lateral sectional view in a closed position;

FIG. 13: the leakage protection valve of FIG. 12 in an open position.

FIG. 1 shows a dispensing valve according to the invention in a lateral sectional view. The dispensing valve comprises a housing 4, shown only schematically in FIG. 1, with an inlet opening 5 for connection to a liquid feed line. At the front end of the housing 4 is an outlet pipe 10 is set, at the front end of which there is an outlet opening 12 be. A control lever 6, with which a main valve (not shown in the figure) can be operated, is also pivotably mounted on the housing 4. The flow of a liquid supplied via the inlet opening through the nozzle is controlled via the main valve. Inside the nozzle there is also an automatic switch-off device, not shown, which closes the main valve if a liquid level reaches or exceeds the front end of the outlet pipe during a refueling process. For this purpose, the outlet pipe has a sensor line 24 which is led from the Auslau fende 12 to the automatic shutdown device.

FIG. 2 shows an enlarged side sectional view of the outlet pipe 10 of FIG. 1. In this view it can be seen that a leakage protection valve 13 according to the invention is arranged at the inlet end 11 of the outlet pipe 10 (in the area 9). It can also be seen that a sensor line valve 26 is located in an end region 25 of the Fühlerlei device 24. In the figures shown below, enlarged views of the areas 9 and 25 are shown, on the basis of which the mode of operation of the leakage protection valve 13 and of the sensor line valve 26 is explained in more detail.

FIG. 3 shows an enlarged view of the area 9 shown in FIG. 2, in which a leakage protection valve 13 is arranged. Figure 3 shows the leakage protection valve 13 in a closed position. The leakage protection valve 13 comprises a valve seat 14 and a valve body which is designed to close the valve seat 14 and has a first part body 15 and a second part body 16. The first part body 15 lies on the valve seat 14 in the shown closed position sealing. Within the first part of the body 15 there is a recess into which the second part of the body 16 is inserted. The first part body 15 thus completely surrounds the second part body 16 radially. In the closed position shown, a sealing surface 21 of the second part body 16 rests in a sealing manner on a counter-sealing surface 19 of the first part body 15. The first part-body 15 thus forms a valve seat (or part-body valve seat) for the second part-body 16. In the state shown in FIG. 3, the anti-drip valve is completely closed so that any remaining liquid cannot escape from the nozzle.

Rigidly connected to the valve seat 14 is a central shaft 29 which extends in the axial direction of the leakage protection valve and on which the second part body 16 is guided in a sliding manner. For this purpose, the second partial body 16 has a central through-bore through which the shaft 29 is passed. The shaft 29 defines an axial direction of the leakage protection valve.

A registration plate 33 with registration openings 32 is also rigidly connected to the valve seat 14. The first partial body 15 comprises four guide legs 30 at its inlet end, of which only two are illustrated in the sectional view of FIG. 3 in the manner of a side view. The sectional plane in FIG. 3 does not run through the guide limbs 30. The guide limbs 30 are respectively guided through one of the registration openings 32 in a sliding manner. The first part-body 15 is thereby guided linearly at its inlet-side end. At its rear end, the first partial body 15 comprises three guide webs 31. These are designed to slide against an outer surface of the second partial body 16 when the second partial body 16 is moved downstream relative to the first partial body 15. The leadership of the partial body 15, 16 will also be explained in more detail with reference to FIGS. 5 to 7.

The second part body 16 is formed in the present case from a magnetic material. In addition, a Ge counter magnetic body 23 is connected to the valve seat 14. The counter magnetic body 23 is symmetrically arranged with respect to the axial direction predetermined by the shaft 29, whereby a uniform magnetic attraction force is exerted on the second partial body 16. The partial body 16 is held in the closed position by this force of attraction. At the same time, the part body transmits a force to the first part body 15 by 16 due to the contact of the sealing surface 21 of the second part body 16 on the mating sealing surface 19 of the first part body 15, which is also pressed into the closed position. A force effect for moving the second part of the body into the closed position can also be generated in alternative embodiments by other devices, for example by means of a mechanical restoring element, in particular by means of a spring element.

Figure 4 shows the leakage protection valve 13 in an open position. A transition from the closed position shown in FIG. 3 to the open position can take place in particular by opening the main valve and a flow of liquid passing through the main valve. The flow of liquid hits the inlet-side front surfaces of the first and second sub-bodies 15, 16 and generates an opening pressure there that is sufficient to overcome the magnetic force acting between the counter-magnet body 23 and the second sub-body 16 and both the first sub-body 15 and the second Part body 16 to move downstream. In FIG. 4 it can be seen that, compared to the closed position shown in FIG. 3, on the one hand the first partial body 15 opposite the valve seat 14 and on the other hand the second partial body 16 with respect to the first partial body 15 moved downstream. As a result of the movement of the first partial body 15 relative to the valve seat 14, a first fluid path 17 is released. As a result of the movement of the second partial body 16 relative to the first, a second fluid path 18 is released. The liquid flow impinging on the leakage protection valve 13 can thus either flow along the first fluid path 17, which runs between an outer surface of the first part-body 15 and the valve seat 14, or along the second fluid path 18, which is initially on the outside of the second part-body 16 and on the inside past the first part body 15 and then runs through a passage opening 20 in the first part body 15. The first fluid path 17 merges with the second fluid path 18 behind the passage opening. With the additional second fluid path 18, the throughput through the leakage protection valve can be increased and the back pressure in front of the valve can be reduced.

It is possible in alternative embodiments to provide further fluid paths which can be released by a downstream movement of the first part body 15 relative to the valve seat 14 and / or by a downstream movement of the second part body 16 relative to the first part body 15.

In addition, another fluid path may be present within the scope of the invention, which runs through a gap between an outer surface of the shaft 29 and an inner surface of the central through-hole of the second part-body 16 and which is constantly open regardless of the position of the part-body by 15, 16 is. Such a gap between the outer surface of the shaft 29 and the inner surface of the central through-hole may be necessary in order to enable sufficient mobility of the part-body 16 relative to the shaft 29. In a preferred embodiment, the radial distance between the outer surface of the shaft 29 and the inner surface of the central through hole is so small that the capillary forces acting on the fluid in the space are sufficient to greatly reduce the fluid leaking through this space and preferably to prevent it completely.

In FIGS. 3 and 4 it can be seen that the second part body 16 tapers in cross section starting from the sealing surface 21 in the upstream direction. In the region of the taper, the outer surface of the second part body 16 is arched outward in a first section 36 and arched inwardly in a second section 35 arranged upstream thereof. Due to the curvatures in the area of the sections 35, 36, the liquid flowing along the second fluid path 18 is guided in a flow-optimized manner in the direction of the passage opening 20.

In FIG. 4, the first and second sub-bodies are in a maximum open position in which the sub-bodies 15, 16 strike a stop which limits the downstream mobility of the sub-bodies 15, 16. The stop is here exemplarily formed by a sensor line plug 34 which is placed on one end of the sensor line 24, the stop or stops can of course also be implemented in other ways. In this maximum open position, the second part of the body remains even after the liquid has been dispensed, for example after the main valve has been closed. The second part body 16 is so far outside of an effective area of the counter magnetic body. The gravitational force acting downstream in the position shown and the frictional forces caused by the sliding guide of the part-bodies are therefore greater in total in the position shown than the magnetic force of attraction between the second part-body 16 and the counter-magnetic body 23 can thus leak protection valve 13 through the still open leakage.

Only when the nozzle (and thus the axial direction of the leakage protection valve 13) is inclined upwards on the outlet side, the force relationship can be reversed, so that the magnetic force is sufficient to move the second partial body 16 into the closed position. The sealing surface 21 of the two th part body 16 meets the mating sealing surface 19 of the first part body 15 and thus transmits a force to the first part body 15, which is thereby taken into the closed position. The above-mentioned change in inclination, which leads to a closing of the leakage protection valve, can take place, for example, when a user removes the nozzle from a filler neck and then hooks it into a fuel pump. The leakage of residual amounts of liquid is reliably prevented by closing the leakage protection valve.

If, instead of the magnetic interaction between the second valve body 16 and the counter magnet body, a mechanical return element is provided which urges the second valve body into the closed position, it can also be provided in this case that the above-described force relationship is reversible with the help of the inclination of the nozzle.

FIG. 5 shows a further cross-sectional view of the area 9 shown in FIG. 2, with a another cutting plane was selected. The sectional plane in FIG. 5 runs through two guide webs 30 opposite one another in the transverse direction. The outlet-side guide webs 31 cannot be seen in this view. In Figure 5, two Schnittli lines AA and BB are drawn. Figure 6 shows a sectional view along the section line AA and Figure 7 shows a sectional view along the line BB. For purposes of illustration, FIGS. 6 and 7 show further elements, which are actually not recognizable in the sectional view, in the manner of a plan view.

In FIG. 6 it can be seen that the guide webs 31 of the first partial body 15 rest against the outer circumference of the second partial body 16 in the valve position shown in FIG. The Teilkör by 15, 16 are thereby led to each other and stabilized relative zuei nander. In FIG. 7 it can be seen that the four inlet-side guide legs 30 of the first partial body 15 are guided in a sliding manner through the registration openings 32. The registration openings 32 extend through the registration plate 33 connected to the valve seat 14.

FIGS. 8 to 10 show enlarged views of the area 25 shown in FIG. 2, in which a sensor line valve 26 is arranged at the end of the sensor line 24. The sensor line valve 26 comprises a valve body 27 which can be moved within the sensor line 24 and which in the present case is designed, for example, as a ball. In addition, the sensor line valve comprises a valve seat 28. Upstream of the valve seat 28 there is a blocking element 38 which limits the mobility of the valve body 27 but does not prevent gas exchange through the sensor line 24. The valve body 27 can move between the valve seat 28 and the blocking element 38. In the state shown in FIG. 8, the valve body 27 is located inside the valve seat 28 and thus closes off the sensor line 24. The valve body 27 is held in the valve seat 28 due to the downward inclination of the sensor line 24 so that it runs outwardly. The main valve of the nozzle is closed in the state shown, no liquid is being dispensed.

After opening the main valve, a vacuum is generated within the sensor line 24 in a manner known from the prior art and air is sucked in through the sensor line 24. The gas flow is suitable for lifting the valve body 27 out of the valve seat 28 against the force of gravity. The valve body 27 is thereby pressed against the blocking element 37. This state is shown in FIG. When a liquid level reaches the outlet end 12 of the outlet pipe 10, there is an automatic shutdown, no more gas is sucked in, so that the valve body falls back into the valve seat.

After a liquid has been dispensed, the dispensing valve is usually removed from a filler neck and, for example, hung in a dispensing pump. As a result, the dispensing valve and the outlet pipe 10 auslaufseifig tends to ge upwards. Due to the force of gravity, the valve body 27 falls out of the valve seat 28, so that any residual amounts of liquid present in the sensor line 24 can evaporate.

FIG. 11 shows two gray scale sketches to illustrate the liquid pressure prevailing inside a dispensing valve in the area of a discharge valve. Light gray tones create a low pressure and darker gray tones create a higher pressure displayed. The pressure values were obtained through a mathematical simulation. FIG. 11A (top) shows the pressure conditions in a conventional leakage protection valve known from the prior art, which has a one-part valve body which is arranged in the region 40.

It can be seen that there is a significant pressure increase in front of the area 40.

FIG. 11B shows the pressure conditions within a nozzle according to the invention in the area of the anti-leakage valve 13. The anti-leakage valve 13 and the other elements of the nozzle are not explicitly shown, however, based on a comparison with FIG. 4, the position of the respective elements ( in particular of the first part body 15 and the second part body 16) can be identified. The positions are identified in FIG. 11B with the corresponding reference symbols. The leakage protection valve 13 is in the geöffne th state in which the part bodies 15, 16 release the fluid paths 17 and 18. A comparison of the gray values in illustrations A and B shows that a lower back pressure is established in front of the leakage protection valve 13 according to the invention.

Figures 12 and 13 show a leakage protection valve of an alternative embodiment of a nozzle according to the invention in a side sectional view. In FIG. 12, the leakage protection valve is in a closed position and in FIG. 13 in an open position.

The alternative embodiment differs from the embodiment of Figures 1 to 10 only in the design of the leakage protection valve. Therefore, only these differences from the embodiment of FIGS. 1 to 10 are described in the following. In the alternative embodiment of FIGS. 12 and 13, the first partial body 15 comprises an annular flat sealing element 15b and two partial body elements 15a and 15b.

The part-body element 15a is connected to the downstream side of the flat sealing element 15b in such a way that a radially inner, downstream-facing sealing surface 15bl is exposed, that is, it is not covered by the part-body element 15a. The part-body element 15c is connected to the upstream side of the flat sealing element 15b in such a way that a radially outer, upstream-facing sealing surface 15b2 is exposed, that is, it is not covered by the part-body element 15c. The sealing surfaces 15bl and 15b2 are aligned approximately perpendicular to an axial direction of the leakage protection valve.

In this embodiment, the second partial body 16 has an upstream-facing sealing surface 21 'which is designed to abut against the sealing surface 15bl. In addition, the leakage protection valve in this embodiment has a valve seat 14 ', which is designed for sealing contact with the sealing surface 15b2.

Due to the upstream and downstream facing sealing surfaces 15bl and 15b2 of the flat sealing element 15b, which are essentially perpendicular to the axial direction of the leakage protection valve, a particularly good sealing effect can be achieved between the two partial bodies 15, 16 or between the first partial body 15 and the valve seat 14 'can be generated. At the same time, the part-body elements 15a and 15c serve to reduce the effects of the flat sealing element 15b on the flow of liquid in the opening position of the leakage protection valve. In particular, the part-body elements 15a, 15c guide the flow of liquid past the flat seal element 15b as advantageously as possible. For this purpose, the part-body elements 15a, 15c taper in the axial direction (that is, in the downstream direction or upstream), the outer surfaces of the Teilkörperele elements 15a, 15c are curved inward and outward.

Claims

1. Nozzle valve for dispensing a fluid, comprising an inlet opening (5) for connection to a fluid supply line, an outlet end (12) opposite the inlet opening, a main valve for controlling the fluid flow through the nozzle valve and a leakage protection valve (13) arranged downstream of the main valve , with a valve seat (14,

14 ') and a valve body (15, 16) that can be moved upstream into a closed position, the valve body (15,

16) has a first part-body (15) and a second part-body (16) which is designed to be movable relative to the first, with a downstream movement of the first part-body (15) relative to the valve seat (14,

14 ') a first fluid path (17) can be opened and a second fluid path (18) can be opened by a downstream movement of the second partial body (16) relative to the first partial body (15), characterized in that one of the partial bodies (15 , 16) is designed to take the other of the two sub-bodies (15, 16) with it into the closed position during a movement in the direction of the closed position.

2. Dispensing valve according to claim 1, in which the first part-body (15) has at least one passage opening (20) for the second fluid path (18), the passage opening (20) being caused by the movement of the second part-body (16) relative to the first part-body ( 15) can be released.

3. Dispensing valve according to claim 1 or 2, in which the second part-body (16) has a sealing surface (21, 21 ') for resting on a counter-sealing surface (19, 15bl) of the first part-body (15), the mating sealing surface (19, 15bl) preferably forming a partial body valve seat for the first partial body (15).

4. nozzle according to claim 3, wherein the sealing surface (21 ') of the second part body and the counter-sealing surface (15bl) of the first part body (15) an angle between 60 ° and 120 °, preferably between 80 ° and 100 ° with an axial direction of the Occupy the leakage protection valve, and further preferably stand essentially perpendicular to the axial direction of the leakage protection valve.

5. Dispensing valve according to claim 3 or 4, in which the second part body (16) has a circumferential surface which is completely radially surrounded by the first part body (15) in the closed position of the leakage protection valve (13), the second part body (16) preferably concentrically is arranged to the first part of the body (15).

6. Dispensing valve according to claim 5, in which the second part body (16) tapers starting from the sealing surface (21, 21 ') towards the inlet-side end in cross section, an outer surface of the second part body (16) having a first one in the region of the taper Section (36) and a second section (35) arranged upstream of the first section (36), the first section being curved outward and the second section being curved inward.

7. Dispensing valve according to one of claims 1 to 6, in which at least one of the sub-bodies (15, 16) is slidably guided by means of a linear guide relative to the valve seat (14, 14 '), the linear guide preferably extending in the axial direction of the leakage protection valve (13) having extending shaft (29), which is slidably guided through a through opening of the second part body (16) and / or

- Has a relative to the valve seat (14, 14 ') rigidly angeord designated registration opening (32) through which a guide leg (30) of the first part body (15) is slidably guided.

8. nozzle according to one of claims 1 to 7, wherein the one part body (15) has at least one guide web (31) on which the other part body (16) is slidably guided.

9. dispensing valve according to one of claims 1 to 8, wherein the second part body (16) is designed to move the first part body in a loading movement in the direction of the closed position

(15) into the closed position, the first part body (15) being carried along preferably by force transmission from the sealing surface (21) of the second part body (16) to the mating sealing surface (19) of the first part body (15).

10. nozzle according to claim 9, which has a mechanical return adjusting element which is designed to urge the two th part-body (16) into the closed position.

11. nozzle according to claim 9, wherein the second part body

(16) comprises a magnetic material and a countermag netbody (23) arranged upstream of the second part-body (16) is provided, which is designed to hold the first and second part-bodies (15, 16) by magnetic-specific interaction in the closed position of the outlet - To hold protection valve (15, 16), the first part body (15) preferably being formed from a non-magnetic material.

12. nozzle according to claim 110, wherein the second part body by (16) has a maximum open position which is outside an effective area of the counter magnetic body (23), so that the second part body (16) after Be ends a fluid delivery in an open position ver remains, whereby the second part of the body (16) can be moved back into the effective area using gravity, within which it is pulled into the closed position by the counter magnetic body (23) when the nozzle is tilted upward on the outlet side.

13. Dispensing valve according to one of claims 1 to 12, in which the leakage protection valve (13) is arranged at an inlet end (11) of an outlet pipe (10) of the dispensing valve.

14. Nozzle valve for dispensing a fluid, comprising an inlet opening (5) for connection to a fluid supply line, an outlet end (12) opposite the inlet opening, a main valve for controlling the fluid flow through the nozzle valve, wherein the nozzle valve further extends to the outlet end ( 12) extending sensor line (24), which is in operative connection with an automatic switch-off device, wherein the sensor line (24) is subjected to a vacuum during the fluid discharge, so that a gas flow can be sucked in via the end of the sensor line (24) characterized in that the sensor line (24) has an end region (25) in which a sensor line valve (26) designed to close the sensor line (24) is arranged, which can be moved into an open position by means of the gas flow sucked in through the sensor line (24) .

15. nozzle according to claim 14, wherein the sensor line valve (26) is designed to be by an inclination of the The nozzle on the outlet side to be moved down into the closed position.

16. The nozzle according to claim 14 or 15, wherein the sensor line valve (26) is biased into the closed position by a restoring element.

17. Dispensing valve according to one of claims 14 to 16, wherein the sensor line valve (26) has a valve seat (28) and a valve body (27) which is movably arranged upstream of the Ven tilsitzes (28) within the sensor line (24), so that the valve body (27) can be moved downward into the valve seat (28) on the outlet side by inclining the nozzle and can be moved upward out of the valve seat (28) on the outlet side by inclining the Zapfven.

18. Outlet pipe (10) for a nozzle for dispensing a fluid, comprising an inlet end (11) that can be connected to a housing of the nozzle, an inlet end (11) opposite the outlet end (12), and a leakage protection valve (13) with a Valve seat (14, 14 ') and a valve body (15, 16) which can be moved upstream into a closed position, the valve body (15, 16) having a first part body

(15) and a second part body (16) designed to be movable relative to the first, a first fluid path (17) being created by a downward movement of the first part body (15) relative to the valve seat (14, 14 ') of the leakage protection valve (13) ) can be released and a second fluid path (18) can be released by a downstream movement of the second part body (16) relative to the first part body (15), the leakage protection valve (13) preferably at the inlet end (11) of the outlet pipe (10) is arranged, characterized in that one of the Partial body (15, 16) is designed to take the other of the two partial bodies (15, 16) into the closed position when moving in the direction of the closed position.