EP4514740A1 - Zapfventil - Google Patents
ZapfventilInfo
- Publication number
- EP4514740A1 EP4514740A1 EP23719782.7A EP23719782A EP4514740A1 EP 4514740 A1 EP4514740 A1 EP 4514740A1 EP 23719782 A EP23719782 A EP 23719782A EP 4514740 A1 EP4514740 A1 EP 4514740A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- main valve
- valve body
- restoring
- opening cross
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/42—Filling nozzles
- B67D7/44—Filling nozzles automatically closing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/42—Filling nozzles
- B67D7/44—Filling nozzles automatically closing
- B67D7/52—Filling nozzles automatically closing and provided with additional flow-controlling valve means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/32—Arrangements of safety or warning devices; Means for preventing unauthorised delivery of liquid
- B67D7/3209—Arrangements of safety or warning devices; Means for preventing unauthorised delivery of liquid relating to spillage or leakage, e.g. spill containments, leak detection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/32—Arrangements of safety or warning devices; Means for preventing unauthorised delivery of liquid
- B67D7/3218—Arrangements of safety or warning devices; Means for preventing unauthorised delivery of liquid relating to emergency shut-off means
Definitions
- the subject of the present invention is a nozzle for dispensing a fluid, with an inlet for connecting a fluid supply line, an outlet and a main channel connecting the inlet to the outlet.
- the nozzle valve also includes a main valve device for controlling a fluid flow through the main channel and a control lever for actuating the main valve device.
- the nozzle valve includes an automatic safety shutdown, which is designed to move the main valve device into a closed position regardless of a position of the control lever when a fluid pressure at the inlet falls below a minimum value.
- the nozzle valve comprises a biasing device that biases the main valve device into the closed position and causes a variable opening cross section of the main valve device depending on a fluid pressure at the inlet.
- Such a nozzle is known from EP 2 386 520 Bl. It can be used in particular to dispense fuel into the tank of a vehicle. A user can operate the nozzle using the control lever to open the main valve and close it again after a desired amount of fuel has been dispensed.
- the fuel is provided via a feed pump, which is usually connected to the nozzle by means of a fuel hose.
- the feed pump regularly allows a desired fuel quantity to be pre-selected.
- the user can wait for the preselected amount of fluid to be dispensed, after he has hooked the outlet pipe of the nozzle into a filler neck of the vehicle and then locked the control lever using a locking device.
- the feed pump switches off automatically and the delivery of fuel is stopped. It is not necessarily necessary for the control lever and with it the main valve to be moved back into the closed position after the feed pump has been switched off. If the main valve remains in the open position, there is a fundamental risk that fuel will escape uncontrollably during a subsequent refueling process. In order to avoid this danger, the known nozzle valve has the automatic safety switch-off described above, which moves the main valve into the closed position when the pressure at the inlet falls below a minimum value, especially after switching off the feed pump.
- the above-mentioned pretensioning device creates an increased dynamic pressure in front of the main valve during the delivery of the fluid, which no longer occurs after the feed pump is switched off.
- the biasing device thus contributes to the generation of a sufficient pressure difference, which can be exploited in a known manner within the automatic switch-off device in order to ensure a safe switch-off.
- the pretensioning device ensures that fuel still present within the fuel hose cannot flow out uncontrollably even if the fuel hose is full of fluid after the feed pump has been switched off and the automatic switch-off device has not (yet) been triggered.
- EP 2 386 520 B1 proposed that the main valve be pushed into the closed position in such a tilted manner under the action of the biasing device that its tightness is reduced. Due to the reduced tightness, the pressure present in full hose operation can be reduced in a controlled manner, so that a safe shutdown is guaranteed by this previously known solution.
- the components that contribute to the tilting of the main valve require small manufacturing tolerances and require a lot of testing.
- the object of the present invention is to provide a nozzle that at least partially avoids the disadvantages mentioned above.
- This task is solved with the features of the independent claims.
- Advantageous embodiments are specified in the subclaims.
- the biasing device is set up to generate a discontinuous opening characteristic of the main valve device in such a way that a closing force acting on the main valve device is reduced in a first opening cross-sectional area extending from the closed position of the main valve device up to a limit opening cross section.
- the term fluid includes substances that are liquid, gaseous or in a mixed phase.
- the main valve device can have exactly one or two or more valve bodies.
- An opening cross section of the main valve device is a cross-sectional area that is dependent on the opening state of the one or more valve bodies of the main valve device and is available for the flow of fluid through the main valve device.
- In the closed position of the main valve device all valve bodies of the main valve device are in a closed position. When the main valve device is closed, it has an opening cross section of zero.
- a closing force that acts on a valve body is reduced starting from the closed position up to the limit opening cross section (i.e. within the first opening cross section area).
- the minimum pressure at the inlet required to open the main valve device is thereby reduced.
- the main valve device can therefore be opened more easily by the valve body, whose closing force is reduced, carrying out a corresponding opening movement.
- the fluid provided by a feed pump hits the main valve device with a significantly greater pressure during normal delivery operation, so that the limit opening cross section is regularly exceeded.
- the discontinuity of the opening characteristics is shown by the fact that the reduction in the closing force ceases when the opening cross-section limit is exceeded.
- a larger pressure difference is therefore necessary for a further increase in the opening cross section. Therefore, when the limit opening cross section is exceeded, a high pressure is built up in front of the main valve device, which can be used in a known manner to act on the automatic switch-off device. The operational reliability of the automatic shutdown device can be improved in this way.
- the biasing device is designed such that a minimum pressure required to open the main valve device is in a range between 0.01 bar and 0.5 bar, preferably between 0.05 bar and 0.3 bar lies . Furthermore, it can be provided that a pressure threshold value, from which the opening cross section exceeds the limiting opening cross section, lies in a range between 0.075 bar and 0.5 bar. Preferably, the pressure threshold is at least 5% greater, more preferably at least 20%, particularly preferably at least 50% greater than the minimum pressure.
- the main valve device opens in a controlled manner (maximum up to the limit opening cross section) and thus enables a controlled pressure reduction below the minimum pressure, below which the automatic switch-off device is triggered.
- the minimum pressure can, for example, be between 0.075 bar and 0.45 bar.
- the automatic safety shutdown and the biasing device are preferably designed such that the minimum pressure lies between the minimum pressure and the pressure threshold value.
- the boundary opening cross section can, for example, be in a range between 1 mm 2 and 12 mm 2 , preferably between 2 mm 2 and 8 mm 2 .
- the main valve device has a main valve body, a main valve seat, a pressure reduction channel and a pressure reduction valve body designed to close the pressure reduction channel.
- the main valve device therefore has two valve bodies.
- the biasing device can be set up to force the main valve body and the pressure reduction valve body independently of one another into a closed position, with a change in the opening cross section of the main valve device in the first opening cross section area being caused by a movement of the pressure reduction valve body and with a change in the opening cross section of the main valve device via the Limit opening cross section is caused by a movement of the main valve body relative to the main valve seat.
- an opening cross section of the main valve device can be changed by changing an opening state of the pressure reduction valve body and / or moving the main valve body relative to the main valve seat.
- the pressure reduction channel preferably runs through the main valve body.
- the biasing device for urging the main valve body into the closed position can have a first restoring element, which is preferably designed as a solid tube spring.
- the biasing device for urging the pressure reduction valve body into the closed position can have a second restoring element, which is preferably designed as a pressure reduction spring. Since the main valve device has two independent valve bodies and the pretensioning device has a separate restoring element for each of these valve bodies, the described discontinuity of the opening characteristic can be realized in a simple manner.
- the main valve device is dependent on the fluid pressure in full hose operation is opened in that only the pressure reduction valve body opens, while the main valve body remains in a closed position in which it lies sealingly against the main valve seat.
- an opening cross section can preferably be achieved which corresponds to the limiting opening cross section. Any excess pressure present in front of the main valve device during full hose operation can then be reduced in a controlled manner via the pressure reduction channel.
- normal delivery operation i.e.
- the opening cross-section of the main valve device is (additionally) increased by a movement of the main valve body relative to the main valve seat, so that there is an opening in front of the main valve device through the first restoring element or the full tube spring sets the specified increased dynamic pressure.
- the main valve device comprises a main valve body, which is biased into a closed position by the biasing device against a main valve seat, the first opening cross-sectional area having a first adjustment range of the main valve body and a second opening cross-sectional area extending beyond the limiting opening cross-section having a which corresponds to the second adjustment range of the main valve body adjoining the first adjustment range.
- An adjustment range of the main valve body refers to a movement range (deflection range) extending along an axial direction of the main valve body, within which the main valve body can be moved relative to the valve seat in order to open or open the main valve device. close .
- the discontinuous opening characteristic is also achieved in that the pretensioning device has a smaller reset constant in the first adjustment range than in the second adjustment range.
- the “Resetting constant” is a measure of the ratio between the force required to move the main valve body and the resulting deflection of the main valve body. Due to the smaller restoring constant of the pretensioning device in the first adjustment range, the main valve body is pushed less strongly into the closed position in this adjustment range. This This makes it possible for even a lower fluid pressure in front of the main valve device to cause the main valve device to open until the end of the first adjustment range and thus the limit opening cross section is reached. If the main valve device is acted upon by a larger fluid pressure in normal delivery operation, a further movement of the main valve device occurs Main valve body within the second adjustment range against a restoring force specified by the larger restoring constant.
- the biasing device can comprise a first restoring element and a second restoring element, with a movement of the main valve body in the first adjustment range in the opening direction occurring predominantly or exclusively against a restoring force of the second restoring element and with a movement of the main valve body in the second adjustment range in the opening direction predominantly or exclusively in the opposite direction a restoring force of the first restoring element takes place.
- the above-mentioned separate effect of the restoring elements in the different adjustment ranges can be achieved, for example, in that the first restoring element biases the main valve body relative to a displaceable holding element, wherein the second restoring element biases the displaceable holding element relative to the main valve seat of the main valve device.
- a movement of the main valve body in the first adjustment range in the opening direction can in this case be carried out by a joint movement of the holding element and the main valve body against a restoring force of the second restoring element, wherein a movement of the main valve body in the second adjustment range in the opening direction can be carried out by a movement of the main valve body relative to the holding element against a restoring force of the first restoring element.
- displaceability of the displaceable holding element relative to the main valve seat can be limited by a first stop positioned on the main valve seat.
- the mobility of the displaceable holding element relative to the main valve body can be limited by a second stop formed on the main valve body. If there is only a low pressure in front of the main valve device, the main valve body is tensioned against the displaceable holding element by the first restoring element until the holding element abuts against the second stop of the main valve body. At the same time, the holding element is spaced from the stop present on the main valve seat due to the restoring force of the second restoring element.
- the biasing device comprises a first restoring element with a first restoring constant, which forces the main valve body into the closed position relative to the main valve seat.
- the biasing device in this embodiment comprises a second restoring element with a second restoring constant, which urges the main valve body in the opening direction relative to the main valve seat.
- the second restoring element counteracts the first restoring element, whereby a reduction in the closing force can be achieved in the first adjustment range, which enables a controlled pressure reduction. If the limit opening cross-section is exceeded (i.e. in the second adjustment range), the opposite effect of the second restoring element can be eliminated, whereby the discontinuity of the opening characteristic according to the invention can be realized.
- the restoring constant of the pretensioning device in the first setting range can result from a combination of the restoring constants of the first and second restoring elements, whereby the restoring constant of the prestressing device can result predominantly or exclusively from the restoring constant of the first restoring element when the limit opening cross-section is exceeded (i.e. in the second setting range).
- a restoring force of the first restoring element which acts on the main valve body in the first adjusting range
- a restoring force of the second restoring element which acts on the main valve body in the first adjusting range
- the second restoring element has a first end and an opposite end along a deflection direction second end, wherein the first end is fixed to the main valve body and wherein the second end rests against a stop fixed relative to the main valve seat during a movement of the main valve body in the first adjustment range and wherein the second end is released from the stop during a movement of the main valve body in the second adjustment range is .
- a deflection of the second end of the second restoring element in the upstream direction is also limited by a limiting projection fixed to the main valve body.
- the invention furthermore relates to a fuel pump with a delivery pump for dispensing a fluid and with a delivery hose that connects the delivery pump to a delivery valve according to the invention.
- Figure 1 a fuel pump according to the invention, to which a nozzle according to the invention is connected, in a partially sectioned side view;
- Figure 2 a partial section of the embodiment of the figure
- Figure 2A a detail from Figure 2 in an enlarged view
- Figure 2B a detail from Figure 2 in an enlarged view
- Figure 3 a partial section of Figure 2, where the nozzle is in a different operating state
- Figure 3A a detail from Figure 3 in an enlarged view
- Figure 3B a detail from Figure 3 in an enlarged view
- Figure 4 the view of Figure 3, with the nozzle being in a different operating state
- Figure 5 the view of Figure 3 in a different one
- Figure 6 a part of a second embodiment of a nozzle according to the invention in a sectioned side view
- Figure 6A a detail from Figure 6 in an enlarged view
- Figure 7 a partial section from Figure 6 in a side sectional view in a different operating state
- Figure 7A a detail from Figure 7 in an enlarged view
- Figure 8 the view of Figure 7, with the nozzle being in a different operating state
- Figure 9 the view of Figure 7, with the nozzle again in a different operating state
- Figure 10 a part of a third embodiment of a nozzle according to the invention in a sectioned side view
- Figures 11-13 Partial sections from Figure 10, with the nozzle valve being in different operating states.
- FIG. 1 shows a fuel pump 8 according to the invention, to which a fuel valve according to the invention is connected for dispensing fuel, in a partially sectioned side view.
- the nozzle comprises a housing 12 with an inlet 13 which is connected to a fuel hose 9.
- the fuel hose 9 leads to the schematically shown fuel pump 8.
- An outlet pipe 11 is inserted into the housing 12, at the front end of which there is an outlet 14.
- the main valve device 16 has a main valve body which, in the state of FIG. 1, is held in a closed position in a known manner by a closing spring 28 and a piston arrangement 29 acted upon by the closing spring.
- the main valve device 16 can be actuated in a known manner via a control lever 17 by moving the piston arrangement 29 to the left with the aid of a control lever bolt 27 against the force of the closing spring 28. This will make the Main valve body released in a basically known manner, so that a fluid pressure prevailing upstream of the main valve device can move the main valve body into an opening position.
- the main valve device is forced into the closed position by a biasing device 18.
- the fluid pressure at the inlet 13 must be sufficiently large to dispense the fuel in order to overcome the resistance of the biasing device 18. The interaction of the pretensioning device 18 with the main valve device 16 is explained in detail below in connection with FIGS. 2 to 5.
- the nozzle valve further comprises an automatic switch-off device 10, which is designed to move the main valve device 16 into the closed position regardless of a position of the control lever 17 when a fluid pressure at the inlet 13 falls below a minimum value.
- the shutdown device 10 is set up in a generally known manner (see for example EP 2 386 520 B1) to decouple the control lever bolt 27 from the piston arrangement 29, so that the main valve body is moved into the closed position by the closing spring 28 regardless of the position of the control lever is moved and held there.
- a pressure connection channel 30 opens into the main channel 15.
- FIG. 2 shows a partial section of the embodiment of Figure 1 in a side sectional view.
- the partial section shows the area of the nozzle according to the invention, in which the main valve device 16 and the biasing device 18 are arranged and interact with one another.
- areas A and B are also marked, which are shown enlarged in Figures 2A and 2B.
- the main valve device 16 of this embodiment has a main valve body 20 ' and a main valve seat 23 .
- the piston arrangement 29 presses the main valve body 20 'in the operating state shown in FIG. 2 against the main valve seat 23 into a closed position.
- the valve body 20' which is connected to a valve rod 31, is also clamped into the closed position against the main valve seat 23 by the pretensioning device 18.
- the valve rod 31 extends along an axial direction of the main valve body 20'.
- the biasing device 18 includes a full-tube spring 18a, a pressure relief spring 18c and a displaceable holding element 24.
- the two springs 18a, 18c are compressed relative to their rest position (i.e. press the elements on which they rest apart), with the pressure reduction spring 18c exerting a smaller closing force on the main valve body 20 ' and having a smaller spring constant than the full tube spring 18a.
- a smaller force is required than with the solid tube spring 18a.
- the main valve seat 23 is integrally connected to holding projections 32, which slidably support the displaceable holding element 24 and enable displacement of the holding element 24 along the Enable axial direction.
- the valve stem 31 is also slidably guided through a through opening provided in the displaceable holding element 24.
- the mobility of the valve stem 31 or of the associated valve body 20' relative to the holding element 24 in the closing direction is limited by a stop 35 which is formed at the rear end of the main valve body 20'.
- the pressure reduction spring 18c tensions the retaining element 24 relative to the retaining projections 32 (and thus relative to the valve seat 23) in the closing direction (i.e. to the left in Figure 2).
- the solid tube spring 18a engages an outward-pointing projection 34 of the valve stem 31 and the upstream end of the holding element 24 and thus tensions the valve body 20 'relative to the holding element 24 in the closing direction upstream, but only as far as the front end of the holding element 24 comes to rest at stop 35.
- the stop 35 is positioned so that the main valve body 20' can be moved completely into the closed position not only by the full-tube spring 18a, but only under the additional action of the pressure reduction spring 18c (or under the additional action of the piston device 29 and closing spring 28).
- FIG. 2B shows a detail from Figure 2 in a different operating state, in which the piston arrangement 29 is spaced from the downstream end of the main valve body 20 'and the main valve body is thus released.
- the fuel hose is full of fluid, so that there is a corresponding fluid pressure in front of the main valve device.
- This condition can arise, for example, if the control lever is locked in an open position and the feed pump has been switched off after a preselected amount of fuel has been delivered.
- the fluid pressure in front of the main valve device 16 drops significantly, although in the present case (due to the fuel hose still full of fluid) it still remains above the minimum pressure at which the automatic switch-off device is triggered.
- the main valve body 20' is thus tensioned into the closed position by the solid tube spring 18a and the pressure reduction spring 18c (to the left in FIG. 3).
- a fluid pressure initially remains upstream of the main valve device 16, which is sufficient to move the main valve body 20 'together with the holding element 24 into an open position against the restoring force of the pressure reduction spring 18c, until the holding element 24 reaches the stop 26 abuts (see Figure 3A).
- the gap 33 shown in Figure 2B is thereby closed (see Figure 3A).
- an opening cross section of the main valve device 16 is established which corresponds to the limiting opening cross section.
- Figures 3A and 3B in which the letters A and Sections marked B are shown enlarged.
- Fig. 3B it can be seen that the main valve body 20 'is slightly lifted off the main valve seat 23 (see gap 43).
- a fluid pressure prevailing in front of the main valve device 16 can be reduced in a controlled manner, until the fluid pressure drops below the minimum pressure at which the shutdown device trips. If the holding element 24 rests against the stop 26, the pressure reduction spring 18c cannot be further compressed during a further opening movement of the main valve body 20'. Such a further opening movement (with which an opening cross-section is generated that exceeds the limiting opening cross-section) must therefore take place counter to the restoring force of the solid tube spring 18a. The opening characteristic of the prestressing device 18 is therefore discontinuous when the opening cross-section limit is exceeded.
- Figure 4 shows the detail of Figure 3 in a different operating state of the nozzle.
- the control lever 17 is in a middle opening position, which is associated with a predetermined axial position of the piston arrangement 29.
- the feed pump is switched on, so that the fluid pressure prevailing upstream of the main valve device 16 is sufficient to move the main valve body 20 'downstream in the axial direction against the restoring force of the solid tube spring 18a until the main valve body 20' against the piston arrangement 29 bumps. This results in an opening cross section of the main valve device that exceeds the limiting opening cross section.
- Figure 5 shows the detail of Figures 3 and 4 in yet another operating state of the nozzle.
- the control lever 17 is in a fully open position.
- the Piston arrangement 29 is accordingly shifted further to the right compared to the position in FIG. 4.
- the fluid pressure generated by the feed pump can therefore move the main valve body 20 'even further to the right compared to the state shown in Figure 4, so that the opening cross section increases further.
- Figure 6 shows a main valve device 16 and a biasing device 18 of a second embodiment of a nozzle valve according to the invention.
- Such elements which are essentially identical in the first embodiment according to the invention, are provided with the same reference symbols in the present case. The differences between the first embodiment and the second embodiment are explained below.
- the main valve device 16 comprises a main valve body 20 '', which is forced into the closed position by a biasing device 18, the biasing device 18 having a full-tube spring 18a and a pressure relief spring 18d.
- the biasing device 18 having a full-tube spring 18a and a pressure relief spring 18d.
- the full tube spring 18a engages an upstream end of the retaining projections 32' to bias the main valve in the closing direction.
- the pressure reduction spring 18d is connected at its downstream end to the main valve body 20'' and has a sliding ring 37 at its opposite upstream end, which can be displaced relative to the main valve body 20'' up to a limiting projection 38 when the pressure reduction spring 18d is deflected relative to the main valve body 20''.
- the sliding ring 37 is located on a downstream connection. stop 25 of the retaining projections 32', so that the main valve body 20'' is tensioned in an opening direction relative to the valve seat 23 by the pressure reduction spring 18d.
- Figure 7 shows a detail from Figure 6 in a state in which the piston arrangement 29 is spaced from the downstream end of the main valve body 20 '' and the main valve body is correspondingly released.
- this state can arise, for example, when the control lever is locked in an open position, the feed pump is switched off after the delivery of a preselected amount of fuel and the automatic switch-off device has not yet been triggered.
- the main valve body 20'' is tensioned in the closing direction by the solid tube spring 18a and in the opening direction by the pressure reduction spring 18d.
- the closing force exerted on the main valve body 20'' by the full tube spring 18a is correspondingly reduced by the pressure reduction spring 18d and a minimum pressure required for opening is also reduced.
- the main valve body 20'' can therefore be moved in the opening direction under the effect of a low fluid pressure until the sliding ring 37 comes to rest on the limiting projection 38 (see FIG. 7A).
- This opening movement corresponds to a first adjustment range of the main valve body 20 '' and the opening cross section that can be achieved thereby corresponds to the limit opening cross section.
- Due to the slight opening of the main valve device illustrated in Figure 7 by the gap 44 the fluid pressure can be reduced in a controlled manner until the minimum pressure is undershot and the automatic shut-off device is triggered.
- Figure 8 shows the detail of Figure 7 in a different operating state of the nozzle.
- the control lever 17 is in a middle opening position, which is associated with a predetermined axial position of the piston arrangement 29.
- the feed pump is switched on, so that the fluid pressure prevailing upstream of the main valve device 16 is sufficient to move the main valve body 20 '' downstream in the axial direction against the restoring force of the solid tube spring 18a until the main valve body 20 'against Piston arrangement 29 abuts. This results in an opening cross section of the main valve device that exceeds the limiting opening cross section. In this state, the pressure reduction spring 18d is no longer in contact with the stop 25.
- Figure 9 shows the detail of Figures 7 and 8 in yet another operating state of the nozzle.
- the control lever 17 is in a completely open position.
- the piston arrangement 29 is accordingly shifted further to the right compared to the position in FIG. 8.
- the fluid pressure generated by the feed pump can therefore move the main valve body 20 '' even further to the right compared to the state shown in Figure 8, so that the opening cross section increases further.
- Figure 10 shows a main valve device 16 and a biasing device 18 of a third embodiment of a nozzle valve according to the invention.
- Such elements which are essentially identical in the first or second embodiment according to the invention, are provided with the same reference symbols in the present case. The differences to the other embodiments are explained below.
- the main valve device 16 comprises a main valve body 20, which is tensioned in the closing direction against a main valve seat 23 by the pretensioning device 18.
- the main valve device 16 also includes a pressure reduction channel 21 extending through the main valve body 20, as well as a pressure reduction valve body 22, which is designed to close the pressure reduction channel 21.
- the main valve device 16 thus comprises two valve bodies 20, 22, each of which can contribute to the opening of the main valve device 16.
- the nozzle valve has holding projections 32' which are integrally connected to the valve seat 23 and on which the main valve piston 31 is mounted so as to be sliding and displaceable along its axial direction.
- the biasing device 18 comprises a full-tube spring 18a, which tensions the main valve body 20 against the valve seat 23, and a pressure reduction spring 18b, which presses the pressure reduction valve body 22 tensioned against the main valve body 20.
- the pressure relief spring 18b is clamped in a compressed state between a downstream end of the pressure relief valve 22 and an outwardly projecting collar 40 which is fixed to the main valve body 20.
- the piston arrangement 29 presses both the main valve body 20 against the main valve seat 23 and the pressure reduction valve 22 against the main valve body 20 into a closed position.
- FIG. 11 shows a section from FIG. 10, wherein the piston arrangement 29 is spaced from the downstream end of the main valve body 20 and the pressure relief valve body 22.
- the feed pump was also switched off after the delivery of a preselected amount of fuel and the automatic shut-off device has not yet been triggered.
- the main valve body 20 is tensioned in the closing direction by the solid tube spring 18a.
- the pressure relief valve 22 is tensioned in the closing direction by the pressure relief spring 18b.
- the reset constants of the elements 18a and 18b are selected in the present case so that a movement of the pressure reduction valve body 22 relative to the main valve body 20 in the opening direction requires a lower minimum pressure at the inlet 13 than a movement of the main valve body 20 relative to the main valve seat 23 in the opening direction.
- the low pressure present is therefore just enough to move the pressure reduction valve 22 in the opening direction until it hits a stop 41 fixed relative to the main valve body. This creates a gap 42 between the main valve body 20 and a sealing surface of the pressure reduction valve body 22 through which the fluid can flow. With this opening movement, an opening cross section of the main valve device 16 to increases to a border opening cross section.
- the fluid pressure can be reduced in a controlled manner until the pressure falls below the minimum and the automatic switch-off device is triggered.
- a further opening movement of the main valve device 16 (beyond the limit opening cross section), which is achieved by moving the main valve body 20 relative to the main valve seat 23 in the opening direction, requires a significantly higher pressure, which only occurs when the feed pump is switched on. Since the opening of the main valve device 16 takes place before reaching the limit opening cross section against the smaller closing force of the pressure reduction spring and after the limit opening cross section is exceeded against the larger closing force of the solid tube spring 18a, a discontinuous opening characteristic of the main valve device 16 is realized in the area of the limit opening cross section.
- Figure 12 shows the detail of Figure 11 in a different operating state of the nozzle.
- the control lever 17 is in a middle opening position, which is associated with a predetermined axial position of the piston arrangement 29.
- the feed pump is switched on, so that the fluid pressure prevailing upstream of the main valve device 16 is sufficient to move the main valve body 20 in the opening direction in addition to the pressure reduction valve 22 against the restoring force of the full tube spring 18a until the main valve body 20 collides against the piston arrangement 29. This results in an opening cross section of the main valve device 16 which goes beyond the limiting opening cross section.
- Figure 13 shows the detail of Figures 11 and 12 in yet another operating state of the nozzle.
- the control lever 17 is in a completely open position.
- the piston arrangement 29 is accordingly shifted further to the right compared to the position in FIG. 12.
- the fluid pressure generated by the feed pump can therefore move the main valve body 20 even further to the right compared to the state shown in FIG. 12, so that the opening cross section increases further.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Mechanically-Actuated Valves (AREA)
- Lift Valve (AREA)
- Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22170947.0A EP4269327A1 (de) | 2022-04-29 | 2022-04-29 | Zapfventil |
| PCT/EP2023/060210 WO2023208700A1 (de) | 2022-04-29 | 2023-04-20 | Zapfventil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4514740A1 true EP4514740A1 (de) | 2025-03-05 |
| EP4514740B1 EP4514740B1 (de) | 2025-12-10 |
Family
ID=81449089
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22170947.0A Withdrawn EP4269327A1 (de) | 2022-04-29 | 2022-04-29 | Zapfventil |
| EP23719782.7A Active EP4514740B1 (de) | 2022-04-29 | 2023-04-20 | Zapfventil |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22170947.0A Withdrawn EP4269327A1 (de) | 2022-04-29 | 2022-04-29 | Zapfventil |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US20250243049A1 (de) |
| EP (2) | EP4269327A1 (de) |
| CN (1) | CN119032062A (de) |
| AR (1) | AR129161A1 (de) |
| AU (1) | AU2023261997A1 (de) |
| CA (1) | CA3245729A1 (de) |
| DK (1) | DK4514740T3 (de) |
| ES (1) | ES3061108T3 (de) |
| MX (1) | MX2024013318A (de) |
| PT (1) | PT4514740T (de) |
| WO (1) | WO2023208700A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE414395B (sv) * | 1978-01-24 | 1980-07-28 | Lars Erik Trygg | Vetskeutmatningsanordning |
| US5184309A (en) * | 1990-03-20 | 1993-02-02 | Saber Equipment Corp. | Fluid dispensing nozzle including in line flow meter and data processing unit |
| US5433247A (en) * | 1994-08-05 | 1995-07-18 | Catlow, Inc. | Coaxial breakaway coupling with vapor assist check |
| DK2386520T3 (da) * | 2010-05-14 | 2013-05-06 | Elaflex Hiby Tanktechnik Gmbh & Co | Påfyldningsventil |
| DK2428485T3 (en) * | 2010-09-13 | 2014-03-17 | Elaflex Hiby Tanktechnik Gmbh & Co Kg | dispensing nozzle |
-
2022
- 2022-04-29 EP EP22170947.0A patent/EP4269327A1/de not_active Withdrawn
-
2023
- 2023-04-20 ES ES23719782T patent/ES3061108T3/es active Active
- 2023-04-20 WO PCT/EP2023/060210 patent/WO2023208700A1/de not_active Ceased
- 2023-04-20 PT PT237197827T patent/PT4514740T/pt unknown
- 2023-04-20 EP EP23719782.7A patent/EP4514740B1/de active Active
- 2023-04-20 AU AU2023261997A patent/AU2023261997A1/en active Pending
- 2023-04-20 CA CA3245729A patent/CA3245729A1/en active Pending
- 2023-04-20 CN CN202380037017.1A patent/CN119032062A/zh active Pending
- 2023-04-20 DK DK23719782.7T patent/DK4514740T3/da active
- 2023-04-20 US US18/854,099 patent/US20250243049A1/en active Pending
- 2023-04-27 AR ARP230101020A patent/AR129161A1/es unknown
-
2024
- 2024-10-28 MX MX2024013318A patent/MX2024013318A/es unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AR129161A1 (es) | 2024-07-24 |
| US20250243049A1 (en) | 2025-07-31 |
| AU2023261997A1 (en) | 2024-10-03 |
| DK4514740T3 (da) | 2026-02-16 |
| ES3061108T3 (en) | 2026-03-31 |
| MX2024013318A (es) | 2024-12-06 |
| PT4514740T (pt) | 2026-02-04 |
| EP4514740B1 (de) | 2025-12-10 |
| CA3245729A1 (en) | 2025-02-03 |
| WO2023208700A1 (de) | 2023-11-02 |
| CN119032062A (zh) | 2024-11-26 |
| EP4269327A1 (de) | 2023-11-01 |
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