EP0460296A1 - Filling nozzle for liquid, in particular petrol derivatives with automatic shut-off - Google Patents

Abstract

Filling nozzle for liquids, in particular petrol derivatives, with automatic shut-off, consisting of a body (1), to which, at the front part, a discharge pipe (59) is fixed, whereas at the lower part a handle casing (37) is fixed by means of nuts (29), bolts and resilient rivets (41), and to the rear body part of which filling nozzle the connection for joining to the pipe is screwed, characterised in that in the central part of the nozzle body is accommodated the piston mechanism (6), the rear part of which is enclosed by sleeves of the main spring (11), whereas the front part of the piston is hooked onto the tension rivets and in the front part of the body is fixed the discharge pipe by the bayonet connection, and under the body as well as on the body is fixed the casing, inside which the handle is movably attached and is connected by its front part to the tension rivets, whereas on the body of the handle the hook mechanism is accommodated.

Description

The invention relates to a nozzle for liquid with automatic inflow interruption, by means of which a pipe connection conducts the medium: oil, heating oil, acids or the like to the tank or a filling point. The invention relates specifically to new design solutions with regard to the connection of the pouring pipe and the gun body, the system for overcoming resistance of the main spring - that is, the brass-steel piston -, the connection of the handle to the piston and the handle brake for starting the gun.

The known fuel nozzles that are used work on the vacuum principle and the principle of atmospheric pressure, whereby the force required for the automatic switching off of the gun when the tank is full is achieved. Because the fuel flow is interrupted in the direction of the fuel flow, these pistols generate large hydraulic shocks. These impacts accelerate the wear of the elements for the encapsulation, and the force for automatic interruption is not adjustable.

Guns with automatic interruption are also known, which operate on the vacuum principle and the positive pressure principle for fuels. With these guns, the fuel flow is interrupted in the opposite direction to the fuel movement.

With the known solutions of the nozzle for liquids, which can be found at the companies "OPNI" and "BUCKI" in the USA and "ELAFLEX" from the FRG or in the patent documents YU PS 42141 and YU PS 41142 as well as in the Yugoslav application P-3157/76, the pouring pipe is connected to the gun body by means of a threaded bolt. The sealing was achieved with rubber rings and a screw counteracts unscrewing. Since both the pouring spout and the body were made of the same material (aluminum), thread damage to these elements often occurred when the pistol was overhauled. This caused the pipe to "stall" in the body, it was not possible to remove the pipe, repair it or restore the function of the gun. Because of the specific shape, the pipe and gun body were predominantly made in sand casting, which from a technological point of view, however, could not ensure a reliable quality of the cast parts.

In the aforementioned gun solutions, wire spring threads were attached to the outside of the upper part of the pouring spout for hooking the gun to the tank or for similar purposes. This wire spiral was hooked onto the edge of the tank's inlet opening and held the gun in place, but caused problems when pulling out the gun because it hooked on the edge. It was also too expensive to install and fix the pistol.

The system for overcoming the main spring in the solutions mentioned is such that larger dimensions of the gun body can be achieved via appropriate pistons. The cross-section (radial) section of this piston has a circular shape, which means that the piston also takes up a larger area, that is, the Area cut is larger. Since an opening for the fuel flow must also be secured around the piston, the dimensions of the gun body are larger.

In the existing solutions of these pistons, there is a groove in the middle, in which balls or rollers are attached, which are supported by the membrane fork. Since the material from which these pistons are made is conditionally "metallic" and their surface hardness is small in comparison to the rollers, the rollers cut notches in the side wall through the application. This increases the resistance to automatic interruption and reduces the reliability of the pistol.

In the case of the solutions mentioned, the piston movement, that is to say the system for overcoming the main spring, takes place by means of levers or bolts which can be rotated about its own axis. This lever is leaned against the middle piston with the upper end and attached to the start handle with the lower end. When the handle is actuated, the lever rotates around the axis and has overcome the driven spring by pressing on the piston. Since the connections here were relatively "stiff", more effort was required to start and stop the work of the gun, but there was a possibility of losing the seal.

When dispensing liquid, the handle of the machine gun is hooked onto the sheathing of the hook in the case of the solutions mentioned, which has an adapted spring. This solution is technically and functionally not reliable, because the spring often breaks, so that automatic switch off of the gun the handle does not return to the starting position. This caused the liquid to flow over the rim of the tank.

All the above-mentioned shortcomings of the known solutions have led to difficult work, frequent downtimes because of the overhaul and replacement of the elements, both individually and as a whole or in mutual effect.

Proceeding from this, the aim of this invention was to obtain a reliable pistol in which the execution of the elements and assemblies will be structurally and technologically simpler and more economical.

All of the problems mentioned have been solved in this invention so that the connection of the pouring pipe and the gun body is achieved by the so-called bayonet connection. This was solved by pouring a plastic sleeve with pipe guides on the outside of the pouring tube opening that penetrates into the gun body. These guides are designed as teeth (most often 2) which engage in grooves which are made on the inside of the inlet opening of the gun body. The sealing takes place here with the help of 2 rubber sealing rings. Such a connection prevents the tube from being inserted into the gun body and enables the tube to be removed quickly and easily for overhaul.

A further characteristic of the invention is that the actual pouring pipe on the outer surface of the circumference, mainly in the upper part, contains grooves which enable the gun to be reliably suspended from the tank neck.

Another characteristic of the invention is the system for overcoming the main spring resistance, i.e. the brass-steel piston was designed as a square piston with a rectangular cross-section. This enables a much simpler and more economical die casting to be used instead of the previous sand casting of the gun body. This in turn offers opportunities for larger production quantities, better quality of the cast parts and greater reliability in the casting process.

A particularly expedient construction is achieved in this invention if, as a further characteristic of the invention, a disk made of hard metal is attached to the rear side wall of the groove on the brass steel piston in which the rollers are mounted, on which the membrane fork rests from above is attached. This ensures secure support for the rollers, which does not wear out as quickly and does not cut any notches in the piston body. Thus, the resistance when the automatic switch-off increases and the reliability of the pistol decreases (A.d.Ü .: meant "increases").

According to a further characteristic of the invention, the connection between the piston and the system for overcoming the resistance of the main spring and the starting handle of the pistol has been achieved by a rivet. This rivet is with the upper arm to the inside of the front from the lower side Piston part of the groove is ajar. The rivet is hinged and rotatable in the handle seal, which is attached to the gun body. At the level of this seal, horizontal handle rivets are attached on the left and right side, around which the handle is rotatably attached. The pull rivet is attached to the handle with the lower end, the rivet being leaned against the handle between this point and the joint via the handle disc. This has resulted in an easier and safer connection between the handle and piston with regard to the start and stop function of the gun.

According to another important characteristic of the invention, the hooking of the handle for activating the pistol and the automatic tapping by the hook carriage are solved. Together with the stop, it is slidingly supported in and under the handle cover and is connected to the elastic rivet via the spring. On the other hand, it leans against one of the casing rivets with its free end. Since the hook cuts here have a flat, rectangular shape and are therefore larger, the guiding system is also more reliable, while the contact surface on the hooking axis is wider. This reduced their wear.

• Bild 1 stellt den Längsschnitt der Zapfpistole für Flüssigkeit mit automatischer Unterbrechung im Vergleich zu dieser Erfindung dar;
• Bild 2 stellt die Verbindung des Ausgußrohrs und des Pistolenkörpers im Schnitt auf der Linie A-A des Bildes 1 dar;
• Bild 3 stellt die Verbindung des Ausgußrohrs und des Pistolenkörpers auf der Linie E-E vom Bild 2 dar;
• Bild 4 stellt den Pistolenkörper mit dem System zur Überwindung der Hauptfeder (Kolben) im Schnitt B-B vom Bild 1 dar;
• Bild 5 stellt das Gefüge der Zugniete und des Griffes am unteren Teil des Pistolenkörpers im Schnitt auf der Linie C-C vom Bild 1 dar und
• Bild 6 stellt das Äußere des Anhak-Systems des Griffes an die Ummantelungsniete beim automatischen Aktivieren der Pistole im Schnitt D-D vom Bild 1 dar.

The invention is explained in more detail with the aid of the drawings:

• Figure 1 shows the longitudinal section of the automatic liquid fuel nozzle compared to this invention;
• Figure 2 shows the connection of the pouring pipe and the gun body in section on the line AA of Figure 1;
• Figure 3 shows the connection of the pouring pipe and the gun body on the EE line from Figure 2;
• Figure 4 shows the gun body with the system for overcoming the main spring (piston) in section BB from Figure 1;
• Figure 5 shows the structure of the rivets and the handle on the lower part of the gun body in section on the line CC of Figure 1 and
• Figure 6 shows the exterior of the hook system of the handle on the casing rivet when the gun is automatically activated in section DD from Figure 1.

The nozzle for liquid, especially for petroleum derivatives, with automatic interruption consists of 3 whole parts: the gun body (1) with the system for overcoming the resistance of the main spring (11) and membrane structure for (de) activation of the gun, pouring handle and handle in the casing with hooks and rivets (28).

At the rear part of the gun body (1) the connection connection (20) is wrapped, in which the connection (27) is fastened by means of a snap part (18). Between the connections (20, 27), the seal was made using a sleeve (24) with a ring (23) and an additional ring seal - spring - (21). In the connection (27), on which the pipe for the liquid supply is screwed, there is a triangular sieve (25) and seal (26). The diffuser (16) is in the body (1) in front of the connections (20, 27) Plugs (13) bent, which is leaned against the inclined entrance opening of the diffuser (16). The guide (15) of the plug (13) is fastened to the plug (13) within the diffuser (16) of the connection (27) in its axis. The spring (17) is attached to the guide (15) from the rear side. The spring (17) is leaned against the middle ring of the diffuser (16) on one side and restricted by the spring part (19) on the other side. The front of the diffuser (16) is leaned against the sleeve (9) of the body (1), while the plug (13) of the diffuser (16) is leaned against the sleeve (12). The sleeve (12) is in a sliding overlap with the sleeve (8), below which the main spring (11) is attached.

The piston (6), in which the piston (5) is accommodated, is located in the central part of the body (1). In the front part of the brass-steel pistons (5, 6) with a right-angled cut there is a right-angled opening in which the bandage rivet (7) is accommodated. At the tip of the brass-steel pistons (5, 6) there is a groove in front of the rivet (7) on the rear side, in which the upper part of the train rivet (28) is accommodated. In the rear part of the brass-steel pistons (5, 6) there is a right-angled slot under the main spring (11), in which the binding rivet (7 ') with the spring (10) is accommodated. Between the rivets (7, 7 ') there is a groove in the middle of the brass-steel pistons (5, 6) on the upper side, in which 2 rollers (42) are accommodated. The disk (64) is attached to the rear wall of this groove and prevents excessive wear of this piston part.

The fork (50) of the membrane (43), in which the rollers (42) are accommodated, is located on the upper side of this groove. On the upper side of the fork (50) there is the carrier (45) on which the membrane (43) is fastened between the lower coaster (48) and the upper coaster (47). The stop (49) of the rollers (42) is located around the carrier (45) between the fork (50) and the lower coaster (48). The lower end of the spring (46) is leaned against the upper coaster (47), the upper end of which is leaned against the cover (44). The cover (44) closes the membrane structure on the upper part of the body (1) and pulls the free end of the membrane (43) by means of screws (63). The space above the membrane (43) is connected to the front part of the body (1) and the pouring pipe (59) via the support (51) and ball (52).

The pouring pipe (59) is attached to the front part of the gun body (1) with the help of the so-called bayonet connection (Figures 2 and 3). At the rear of the tube (59) a plastic sleeve with tube guides (57) is poured, which engage in the connection in grooves which are made on the inside of the wall of the body (1). The unscrew protection is released via the screw (56). This connection was sealed with two ring seals (55), which are housed in the plastic guide (57). Along the pouring pipe (59) there is a channel on the lower side - the capillary - which is closed at the inlet by the throttle (60) and at the outlet in the body (1) by plugs (58). The pouring spout (59) is provided on the peripheral edge of the outside, in the upper part, with grooves for the purpose of effective attachment to the tank opening.

It is attached from the lower side to the gun body (1) by means of screw (30), nut (29) and elastic rivet (41), casing (37) of the handle (34). The front part of the handle (34) is attached to the lower part of the rivet (28), the tip of which is leaned against the groove of the brass-steel piston (5, 6) (Fig. 5). The middle part of the rivet (28) is designed as a ball joint, which is mounted in the seal (2) of the handle (34). The seal (2) is fastened in the body (1) and secured from above by the coaster (3) and the Seeger ring (4). At the level of the seal (2) there are two horizontal rivets (61) on the left and right side, with which this end of the handle (34) is rotatably mounted in the body (1). The handle (34) at this point, like the casing (37), has the shape of the double letter "U", where the lower profile is smaller. The washer (62) of the handle, on which the rivet (28) is leaned, is accommodated on the back of the lower “U” profile.

The handle (34) (Fig. 1), with which the gun is switched on and off, is equipped with a hook and lock mechanism if an automatic mode of operation of the gun is desired. The handle (34) is closed from the upper side by the cover (33), under which the spring (32) is accommodated within the handle (34). One end of the spring (32) is attached to the elastic rivet (31), while the other end is tied to the carriage (35), the free end of which extends above the handle (34). The stop (36) of the hook is attached to the slide (35). The free end of the carriage (35) leans against one of the rivets (40) which are attached along the casing (37) during operation. Which of the rivets (40) will be hooked depends on the desired flow rate. The closing rivet (38) with the elastic rivet (39) is attached to the lower part of the casing (37).

The body (1) has a plastic covering (53) on the front outside and the covering (54) on the rear side.

The medium (oil, petrol and the like) is passed through the pipe connected to the gun via the connection (27) at a pressure of 2.2 bar. To activate the automatic operation of the gun, the handle (34) is pulled. By lowering the hook slide (35) and leaning against one of the rivets (40) (depending on the desired flow rate, one of the rivets is selected), the pull rivet (28) at the front end of the handle (34) is activated. By turning the hinge bearing of the seal (2), the tip of the rivet (28) pulls the steel piston (5), which secures a simultaneous movement of the brass piston (6) via the roller (42). Since both brass-steel pistons (5, 6) move in the same direction, they cope with the resistance of the main spring (11). The spring (11) acted on the plug (13) of the diffuser (16) via the sleeve (12) and the piston (6), which prevented the medium from flowing out.

The medium pressure of 2.2 bar copes with the spring (17) on the guide (15). The guide (15) and plug (13) of the diffuser (16) move in the direction of movement of the brass-steel pistons (5, 6), which creates a space for the outflow. The medium flows between the diffuser (16) and stopper (13) in a certain controlled movement, which is due to the shape of the stopper (13) and the diffuser (16).

The specific controlled movement of the medium between the plug (13) and the diffuser (16) causes the air particles to be drawn in from the atmosphere. This is ensured by an opening on the diffuser (16) and an opening between the sleeve (9) and the body (1). These openings are connected to the opening on the cover (44) and the space between the cover (44) and the membrane (43). This space is also above the channel in the front part of the cover (44) in connection with the channel in the front part of the gun body (1), which via the backrest (51) and ball (52) with the capillary opening in the pouring tube (59) in Connection is established. The tube (59) is in communication with the atmosphere. In the capillary tube of the pouring tube (59) there is the throttle (60) which regulates the intake of a certain amount of air in order to ensure an undisturbed outflow of the medium.

If the medium rises above the level of the opening of the capillary tube on the pouring tube (59), a vacuum is formed over the membrane (43). This causes the diaphragm (43) to move upward, whereby it has to cope with the resistance of the spring (46). The membrane (43) pulls over the carrier (45) the fork (50) in which the rollers (42) are located. This frees the piston (6), on which the main spring (11) acts via the sleeve (12). Their force acts on the plug (13) of the diffuser (16) via the piston (6). The force of the main spring (11) ensures a movement of the piston (6) of the plug (13) in the opposite direction to the direction of the medium outflow until the moment of the dispensing process.

Since this action is carried out very quickly (parts in seconds), the hook slide (35) returns to the starting position as a result of a hydraulic shock and with the aid of the action of the spring (32). At the same time, the spring (10) acts on the piston (5) and returns it to the starting position. The piston (5) returns the handle (34) to the starting position via the rivets (28).

Since the medium flow has stopped, the vacuum disappears. Acting on the upper coaster (47), the spring (46) of the diaphragm (43) brings the fork (50) with the rollers (42) back into a position from which the handle (34) is pulled again and the gun is activated can be.

Claims (11)

The nozzle for liquid, especially for petroleum derivatives, with automatic interruption consists of a body to which a spout is attached to the front part, while a grip is attached to the lower part with nuts, bolts, and elastic rivets. At its rear part of the body the connection for the connection to the pipe is screwed.
Characteristics : The central part of the gun body (1) houses the piston mechanism (5, 6, 7, 7 '), the rear part of which is encased by sleeves (8, 12) of the main spring (11), while the front part of the piston (5 , 6, 7, 7 ') is hooked onto the train rivet (28). In the front part of the body (1), the pouring spout (59) is fastened by the bayonet connection. Under the body and on the body (1), the casing (37) is attached, within which the handle (34) is movably attached, which is connected with its front part to the rivet (28), while on the body of the handle (34) Hook mechanism (31, 32, 33, 35, 36) is housed. The pistol from the application for 1 is characterized in that the square piston (5, 6), which is accommodated in the central part of the body (1) under the membrane (43), consists of the central steel piston (5), two lateral lamellar brass pistons ( 6), rectangular cross-section. 1 and 2, the pistol according to the application is characterized in that in the front part from the lower side of the pistons (5, 6) there is a toothed groove on which the tip of the rivet (28) is leaned. 1-3 according to the application, the pistol is characterized in that on the rear side wall of the groove, which is made from the upper side of the pistons (5, 6) and accommodated in the rollers (42), the disc (64) is attached from hard metal. The pistol from the application is characterized in 1 by the fact that at the upper end of the pouring tube (59) a plastic guide (57) is poured out from the outside in the form of a sleeve which engages with its teeth in grooves which are in the wall of the front opening the body (1) is executed so that a bayonet connection is formed. This connection is secured by a bare screw (56) and in that the seal is made in this connection with two rings (55) which are housed in grooves in the guide (57). The pistol from the application is characterized in 5 by the fact that the upper half of the outer surface of the pouring pipe (59) is designed with grooves in order to ensure easier hooking onto the tank. The pistol from the application is characterized in 1 by the fact that the pull rivet (28), which rests with the upper tip on the groove of the pistons (5, 6), with its central spherical part in the seal (2) of the handle (34 ) is articulated, the handle (34) being fastened to the body (1) from the lower side by the coaster (3) and Seeger ring (4). The pistol from the application is characterized in 7 by the fact that the lower part of the rivet (28), which is bound to the handle (34), via the disc (62) to the back of the lower "U-profile" of the handle ( 34), the handle being rotatably mounted around rivets (61) which are fastened in the body (1) from the left and right sides of the seal (2). The pistol from the application is characterized to 1 in that the hooking mechanism located on the handle (34) consists of the spring (32) which is accommodated under the cover (33), the upper end of which rests on the elastic rivet (31) and the like lower end is bound to the carriage (35). Furthermore, the stop (36) is fastened over the slide (35), the slide (35) and the stop (36) having a plate-shaped, rectangular cross-section for the purpose of a larger contact surface. The pistol from the application is 1 and 9 characterized in that rivets (40) are fastened step-by-step on the rear part of the casing (37), on which the free end of the hook slide (35) rests, and in that the lower angle the casing (37) is the closing rivet (38) with the elastic rivet (39). The pistol from the application is characterized 1-10 in that the body (1) was made from the cheapest die-cast aluminum.

Images