DE2248097A1 - TAP - Google Patents

Description

The invention relates to an automatic tap, in particular for liquid fuel.

It also concerns a tap that is on an overpressure responds in the container to be filled during the filling process and interrupts the filling process, so to prevent damage to the container.

Formerly, based on a general agreement, a tap was created for this process, with which on-on

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Vacuum signal. a lock-out piston, which is in Y / irk connection with your handle stood, the dos main flow valve the tap controlled, responded. A suction tube that with connected to the tap tends to be a To generate a vacuum that is constantly ventilated via a pressure line in the area of the mouth of the outflow nozzle. However, if a sudden sloshing back of the liquid causes the vent to submerge in the liquid, a vacuum signal is immediately established, which the lockout flask triggers and ends the filling process. One such tap construction is shown in U.S. Patent 308> 600 disclosed.

The lock-out piston is also in other tap controls sy stones to use in which slightly differently designed movable mechanical components in a predetermined Position are held, which are triggered immediately after receiving a corresponding signal.

One such system is disclosed in U.S. patent application Ser. 13 ^, 992 shown, in which in addition to the lock-out piston controlling the main flow valve, a second lock-out piston responds to a corresponding signal to a reduced flow of the outflowing liquid

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to cause, in which the flow is cut off for a predetermined period of time and with 'a significantly less Filling speed be on again to adjust the ratio, moderately small remaining amount in a final filling ' Process to be entered in the almost full containers.

The present invention is concerned with the control of such a lock-out piston in an automatic tap, the control also taking place in response to an overpressure in the container to be filled. The control works in a so-called "closed system", namely in a system in which the outflow nozzle is in a fixed or sealing connection with the filler neck of the container to be filled stands.

In such a system it is necessary that the Container is ventilated in any way. Therefore, takes place at an interruption in ventilation, e.g. by blocking the ventilation opening, an internal pressure increase.

The invention is based on the object of being too strong Pressure increase in the container to be filled, in particular a vehicle tank, due to the automatic shutdown of the liquid flow or by reducing the flow rate of the liquid

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speed or the fuel in the container or the vehicle convincing tank to be prevented if the pressure increase has a predetermined. Has reached value.

This is accomplished by modifying the lockout piston that controls the flow of fuel, preferably (as in the conventional tap designs) in response to a negative pressure signal generated in the manner described above will. In the present invention, the object on which the invention is based is achieved in that a control shaft which dominates the actions of the lockout piston, is caused to move in one of two opposite directions to move, in particular in the one axial or longitudinal direction (as in a conventional manner) in response to a negative pressure signal and moving in the opposite direction move in response to an overpressure signal. A diaphragm for controlling the control shaft moves it in response on one of the corresponding signals acting on the same side of the diaphragm, in the axial or longitudinal direction. Both work steps enable the same effect of triggering the lockout piston and initiate the desired one Valve control on.

It can be seen that on the diaphragm at all times

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the internal pressure of the container acts; equally that is Diaphragm exposed to a venting mechanism that generates negative pressure, except when it is used as a The filling signal works inside the filling container is ventilated.

Therefore, there is a swelling or sloshing back or up of the liquid through the ventilation opening generates a negative pressure signal in the system, which is transmitted to the diaphragm, which in turn controls the control shaft e.g. lifts and unlocks the lockout lever.

However, if during the same process, instead of as described above, an increase in pressure in the vehicle tank or in the container to be filled takes place due to the sealing of the ventilation device, is also a predetermined one on the same side of the diaphragm and substantial pressure built up which acts on the diaphragm and thus moves the control stem downward ', wherein also acts on the flow of liquid through the main flow valve.

An embodiment of the. Invention from which further Inventive features result are shown in the drawing. Show it:

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Figure 1 is a side view of the invention Tap, with the outflow nozzle in sealing connection with the filler neck of the »container to be filled, partially in sectional view., is shown,

Figure 2 shows a detailed sectional view of the central part of the tap shown in Fig. 1, the cut being made in the longitudinal axis of the tap and revealing the essential control parts,

Figure 3 is an enlarged detailed view of the upper

Control parts according to FIG. 2, the parts being shown in a different working phase and

FIG. 4 shows a further detailed view, essentially corresponding to FIG. 3, but in a different working phase.

The structural design of the automatic is essentially the same Tap, with the exception of some parts for the. Control of the lockout piston, the tap that is in the

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U.S. patent application Serial Wo. 134,992 by the same applicant is revealed. Therefore, the known parts are not intended to be in greater detail to be discribed. It should suffice that the input. direction of the main flow valve 10, which in the open position ' is shown in Fig. 4, in this position by the valve stem 11 and the hand lever 12, which in turn is hinged to the articulation point 13 of the lockout piston 14, has arrived. Thus, the lock-out piston 14 controls the establishment of the main flow valve 1Q. ,;

A second lockout mechanism 16 controls a secondary valve 17 »that in the usual way inevitably in operative connection with the main flow valve 10 is.

If. The initial negative pressure signal, due to the first Rise of the liquid over the mouth of the outflow nozzle the tap on the second lockout mechanism 16 acts, it immediately releases the blocking connection, which held the secondary valve in the open position, so that the secondary valve 17 (without the main flow

Valve 10 is closed) closes. This process enables it to a secondary valve control 18 in the working position go, so that a poppet valve 19 which is in operative connection with this secondary valve control ultimately makes it possible

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fii.'iO minor .i'lüi-.r.i {. ',.]; oitiir'.onco over the main uiroi ^ -V-Mitil 10, in ο in cui L.adrülliujg;> - Vüj; ^ rj.r ·, with a relatively low port rate, to entnelrne / i.

The invention is characterized by the modified design of the lock-out piston and the control, exemplified by the lock-out piston 14, 16. With more specific reference to this, reference is made to the secondary lock-out piston 16 in FIGS. 2, 3, 4, the sliding bushing 20 of which forms an integral part of the secondary valve 1'7. The sliding bush 20 is inevitably and firmly connected to an inner sliding bush 22, which in turn forms an integral and upwardly directed part of the main flow valve 10. This connecting effect is brought about by a number of annularly arranged steel balls ? A , which are normally located in separate radial slots (as can be seen from the inner slide bushing 22). A central axially extending stub shaft 26 is provided with a coaxially widened section 28 which in turn has the steel balls 24 radially outward against a shoulder

30 holds that part of the inner surface of the outer Slide bush 20 represents.

A helical spring 31 'which goes down on the inner globe

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socket 22 acts, urge, · !; this in relation to the outer one Slide bush 20, in Abvjeaonheit other forces, down to the position given in F.ig. 4 is shown in which the Bbahlkugeln 24 are in engagement with the Schultex 50.

The flexible diaphragm 34, the. With the control shaft 26 connected> is normally under tension a middle position between the upper coil spring and the lower coil spring 38 (see Fig. 2), so that the enlarged portion 28 of the control stem 26 is normally located between the steel balls 24 and is radial to the outside in the locked position.

The. most significant design change of the present invention includes the top and bottom tapered sections 40,42 of the tax authority 26, 'with the aforementioned sections arranged above and below the enlarged section 28 are. You go over frustoconical sections 44.46 into the normal body of the tax shaft 26 over.

From this it can be seen that any longitudinal movement, both up and down, as from the Figures can be seen, an immediate unlocking of the steel balls 24 causes the radially to go inwards, due to the sudden Unlock the Ausspe: prungs-Eolben. .

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The eleiaents, which are locked as before, are visually impaired, so that there is no connection n / J. croiuander flour ¹ -. I.naa ιυκί work independently of one another.

Accordingly, the space 48 above the diaphragm 34, as described in the aforementioned US patent application, communicates with the control signal source, but sealed in another way, so that the diaphragm moves in response to this signal. This is due to the fact that the lower side of the diaphragm in the present embodiment is in communication with the atmospheric pressure via a ventilation valve 50.

According to the usual method of operation, the outflow nozzle 52 of the tap is coupled with a sealing connection 5 ^ with the filler neck 56 of the container to be filled, so that when the ventilation opening is initially flushed over, the vacuum or negative pressure signal is generated as described above and via a line 60 and the Eest of the system, as disclosed in the aforementioned US patent application, c | e «Baufli 4-8 z ^ ge. This aforementioned process occurs when the tap with the main flow valve in the wide open position, as shown in FIG. 1, is. The result is shown in fig. 5 shown in detail. The negative pressure signal

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in the BaV-Ui 48 has the flexible diaphragm 34 against the helical spring 36 raised and the control pin 26 upwards pulled so that the steel balls moved inwards and thus instantly the lockout piston, 'as shown, unlocked.

On the other hand, the Annahni.3 is made that instead of the negative pressure signal reaching the space 48, the filling container or vehicle tank is suddenly acted upon by a strong internal pressure, e.g. *. due to a failure of the ventilation system. In this case, the space 48 is acted upon by a pressure lying above atmospheric pressure, which presses the diaphragm 34 and the control pin 26 downwards (see FIG. 4). Due to these conditions, the frustoconical section 44 located directly above the widened section 28 is moved downward so that the upper tapered section 40 of the control pin lies opposite the steel balls 24 and in turn enables them to roll inwards and instantly the lock-out piston τ \\ unlock.

The secondary valve 17 is released from the main flow valve 10 and brought into the closed position by the viewing spring 62 while the main flow valve 10 remains in the open position.

The above-described operations result in a printing

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increase in the barely of the Sckündär-Ventilntouerung 18, the one ■ the poppet valve. 19 allows a predetermined, relatively low liquid throughput for the. End filling G- / organ?; To let through the main flow valve. At the same time, acted upon by the position of the second Uj: -V valve 17, the device for valve control preferably determines the provision of the control signal.

As a result, the following control signal of the control of the lock-out piston 14 of the main stream oai valve ilcs 10 is fed. For this reason, as in a conventional manner, the main flow valve 10 is unlocked by the Liquid rises repeatedly over the mouth of the outflow nozzle during the final filling process. With others In other words, the lock-out piston 14 is designed in the same way as the lock-out piston 16 in order to respond to be unlocked on a negative pressure signal.

Likewise, with the same process, due to any other Pressure rise beyond atmospheric pressure, the same effect can be achieved.

To complete this last function it must be said that the lock-out piston 14, as shown in FIG.

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in its structure essentially with the aforementioned lockout s-IvοIben corresponds. The lower surface of the Diaphragm 66, for example, is continuously connected to the via line 68 Atmospheric pressure in connection.

The upper surface of the diaphragm 66 is exposed to the pressure prevailing in the bar 70, which in turn depends on the control signal, as described above. The diaphragm is arranged between the upper coil spring 72 and the lower coil spring 7 ^z l-. The control stem 76, which communicates with the diaphragm 66, has a relatively strong central portion 78 which holds normally locking steel balls 80 disposed within radial recesses in the lockout piston in an outwardly directed position. The lock-out piston 82 holds the steel balls against a frusto-conical shoulder 84 of the outer sliding bush and locks the parts in their position.

If the negative pressure signal reaches the seam 70 (due to the washing over the ventilation opening 58), pulls the diaphragm 66 the control stem 76 up and allows the steel balls 80 downwards in the direction of the frustoconical section 86 of the control stem to fall and thereby the lockout piston 82 to unlock.

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If a pressure signal is ^{transmitted to the room r} / O via the diaphragm G6 (e.g. via the line 60), the diaphragm is pressed downwards, v / o by the chair balls 80 radially inwards along the surface of the frustoconical section 88 on the in this area Roll up the thinner steering shaft and thus perform the same function as described above. The instantaneous release of the lock-out piston 82 enables the articulation point 13 to snap downwards due to the spring force acting on the main flow valve 10 and to terminate the filling process. It should be noted that the extended portions 28 and 78 of the control shafts 26 and 76, which hold the steel balls in the locking position, slope upwards slightly.

This training was chosen because the negative pressure signal is common stronger than the overpressure signal. In other words, overpressure signals are that could destroy the container, here much lower than the pressures that result with the conventional low pressure signal certain times can be generated. Because of this, the control surface of the control stem is for the softer occurring Signal bevelled less in the axial direction.

The present invention creates a modified embodiment

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bulky piston training, with one after the other on the the same whiteness reacts to a pressure or a negative pressure signal four can. ■

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Claims (5)

T 7? - 0 ^ 0 claims 1) Automatic tap, in particular; for liquid fuel or Fuel, in which a control valve for the?, U pumping liquid is arranged on a Ausnperrur.gs piston is, which is normally held in the working position by locking elements acting radially on the piston with the Sj) err elements in the locked position, i.e. directed radially outward, are held by a central, axially extending control shaft, the instantly to close the control valve is released by moving the control pin axially to release the Locking elements in a radial inward position is withdrawn and wherein the control shaft is connected to a flexible diaphragm, which when acted upon pulls back the control stem by a vacuum signal and thereby locks the locking elements Lock-out piston enables characterized by an enlarged section (28) of the control stem (26), the section (28) normally extends into the area of the spherical locking elements and these are radially outward 3Ö ⁽ J8U / O355 " ⁷ 2248Q97 directs in locked position, by tapering areas to both ends in
axial direction of the enlarged section (2S) ₁ by a device for transmitting the vacuum signal -to one side of the diaphragm (34)? to withdraw the control stem and thereby release the locking device and by means of a device for transmitting an overpressure signal to the aforementioned surface of the diaphragm (34) to
the diaphragm (3 ^) "and the control shaft in operative connection with it in the opposite axial direction
Direction to move and also to release the locking device. . 2) Automatic tap according to claim · 1, d ad u -rch
characterized, that the tap has a connection device for a fixed or sealing connection with a fuel tank, in particular a vehicle tank, and that a device is provided which in response to the increase in the liquid " • Ability beyond the mouth of the outlet connection (52),
the vacuum signal is generated. 3) Automatic tap according to claim 1, characterized
marked that the tap has a -18-3 098U / 035S binding device for a firm or sealing connection with a fuel tank,! ^ special one Vehicle tank, comprises that means is provided which, in response to the rise of the liquid over the mouth of the outlet port (52) out, the Vakuiuii signal generated and that a piping device is provided is, which is in communication with the interior of the container to be filled, for the transmission of the im Tank pressure, such as the overpressure signal, when the pressure in the container to be filled rises above a predetermined value. 4) Automatic tap according to one of the preceding claims, characterized in that the lockout piston (14 ·) on the initial Vacuum signal generated by the first rise of the liquid over the mouth of the outlet nozzle (52) of the Tap addition, responds to an automatic final filling to control. 5) Automatic tap according to one of the preceding claims, characterized in that the lock-out piston (14) responds to the final vacuum signal resulting from the rise in the liquid -19-3098U / 0355 ness of the mouth of Auslaßstutaens (]) 2) of the Zo.pfhalanes addition, during that final Endbefülitangs-operation results. 3 (I H 8 U / U 3 55 BAD ORfOiNAL