JPH035599Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a refueling nozzle, and more particularly to a refueling nozzle that can prevent liquid from dripping from the tip of a discharge pipe and provide good refueling.

BACKGROUND OF THE INVENTION In general, oil supply nozzles have a structure in which a main valve is opened by operating a nozzle lever, and oil liquid is discharged from the tip of a discharge pipe. The discharge pipe has a predetermined length because it is necessary to insert a predetermined portion into an inlet of an oil tank or the like that supplies oil. Therefore, even if the main valve is closed, oil remains in the discharge pipe, and this remaining oil drips after the oil supply operation is completed. In order to prevent this dripping, for example, as shown in Japanese Utility Model Application Publication No. 51-39221, there has conventionally been a refueling nozzle provided with a so-called check valve structure near the discharge port at the tip of the discharge pipe. The check valve installed in this type of oil supply nozzle is biased by a spring or the like when the main valve is closed, and closes the discharge port from the outside of the discharge pipe to prevent dripping of oil remaining in the discharge pipe. When the main valve is opened, the pressure of the oil flowing into the discharge pipe causes the valve to open in the direction of oil discharge against the urging force of a spring, etc., and the oil is discharged from the discharge port. It was structured to do so.

Problems to be Solved by the Invention However, in the conventional oil supply nozzle described above, when discharging the oil, the check valve is displaced in the direction of discharging the oil to open the discharge port. The oil collides with the check valve and scatters, causing air to get mixed into the oil, or the scattered oil spills out of the fill inlet of the fuel tank, polluting the area around the fill inlet. There was a problem with putting it away. Furthermore, if the inlet of an oil tank or the like is narrow or bent, and the outlet of the refueling nozzle must be inserted close to the inner wall of the inlet, a check valve will prevent the oil from flowing into the outlet pipe. The problem is that even if the check valve attempts to move to the open position on the outside of the discharge pipe due to the pressure of the oil, the check valve comes into contact with the inner wall of the inlet and is prevented from moving, so the oil is not discharged and smooth refueling operations cannot be performed. It was hot.

Therefore, in the present invention, when the main valve of the refueling nozzle is closed, the check valve closes the discharge port, and when the main valve of the refueling nozzle is opened, the check valve is inside the discharge pipe. It is an object of the present invention to provide a refueling nozzle which solves the above-mentioned problems by displacing the fuel nozzle inward to open the discharge port.

Means for Solving the Problems In order to solve the above problems, in the present invention, a valve seat is provided at the discharge port at the tip of the discharge pipe, and the valve body provided in the discharge pipe is inserted from the upstream side of the valve seat. The valve seat is configured to come into contact with or separate from the valve seat. Further, the discharge pipe is provided with a partition that is connected to the valve body and is displaced in response to the pressure of the oil flowing from the base end of the discharge pipe, and the valve body or the partition wall is connected to the valve body. A biasing means is provided for biasing the valve to the closed position where the valve contacts the seat. When the oil flows in from the base end of the pipe during discharge, when the flow is stopped, the biasing means displaces the valve body to the closed position to close the discharge port, and the oil flows from the base end of the discharge pipe. When it is done,
The valve element is moved to a closed position upstream of the valve seat together with the partition wall which is displaced against the biasing means by the pressure of the inflowing oil, thereby opening the discharge port.

Embodiment FIG. 1 shows a first embodiment of the refueling nozzle according to the present invention. The refueling nozzle 1 shown in the figure roughly includes a nozzle body 2, a main valve 3, a nozzle lever 4, a discharge pipe 5,
It is composed of a valve body 6 and the like. A pipe line 7 is formed in the nozzle body 2 through which oil is introduced by a pump means (not shown) or the like, and a main valve 3 is disposed on the pipe line 7. The main valve 3 is a valve body that opens and closes an inlet 7a that is provided in the conduit 7 and serves as an inlet through which oil flows into the discharge pipe 5. The main valve 3 is normally biased by a spring 8 to the closed position (note that Figure 1 is the main valve 3
(shows that the valve is in the closed position). The lower end of the main valve 3 is in contact with the upper end of a shaft 9 that is movable in the opening/closing direction of the main valve 3 and is attached to the nozzle body 2, and the lower end of the shaft 9 is rotatable to the nozzle main body 2. Freely installed nozzle lever 4
is in contact with. Therefore, by operating the nozzle lever 4 in the direction of arrow A in the figure, the main valve 3 is moved upward via the shaft 9 to open the inlet 7a.

The discharge pipe 5 is disposed in front of the inlet 7a, and a predetermined portion thereof is inserted into a tank or the like where the oil is to be refilled during refueling work. This discharge pipe 5
The distal end of the discharge pipe 5 is bent inward to form a discharge port 10 provided with a valve seat.
A valve body 6 for opening and closing the discharge port 10 is disposed inside. Further, at the other end of the discharge pipe 5 facing the discharge port 10, a diaphragm 11 movable in directions B and C in the figure is disposed, and the diaphragm 11 and the valve body 6 are connected by a rod 12. . Therefore, the valve body 6 is displaced in response to changes in the diaphragm 11. As will be described in detail later, the pressure-receiving area of the diaphragm 11 (indicated by the symbol _D1 ) and the pressure-receiving area of the valve body 6 (indicated by the symbol _D2 ) are each selected to have an appropriate area. A biasing means 13 such as a spring is disposed between the diaphragm 11 and the upper wall portion 5a of the discharge pipe 5 facing the diaphragm 11.
constantly urges the rod 12 in the direction of arrow B in the figure through the diaphragm 11, so that the valve body 6
0 is biased to the valve closing position. In addition, 14
1 is a guide member that guides the movement of the rod 12 so that the valve body 6 reliably closes the discharge port 10, and 15 is an air escape hole.

In the refueling nozzle 1 having the above configuration, the operation of each component when performing refueling work and when refueling work is completed will be described below. Before starting refueling work, as shown in Figure 1, open the main valve 3 of the refueling nozzle 1.
is biased by a spring 8 to close the inlet 7a, and a valve body 6 provided inside the discharge pipe 5
The discharge port 10 is also biased by the biasing means 13 to close the discharge port 10. In this state, oil having a predetermined internal pressure is flowing into the pipe line 7 on the upstream side of the main valve 3 by a pump means or the like.

Here, the nozzle lever 4 is operated in the direction of arrow A in the figure to displace the main valve 3 to the opening position and open the inlet 7a. Then, the oil having a predetermined internal pressure in the pipe line 7 flows into the discharge pipe 5 from the inlet 7a. However, since the valve body 6 is biased to the closed position and closes the discharge port 10, the oil liquid continues to fill the discharge pipe 5. As this oil enters the discharge pipe 5, the internal pressure within the discharge pipe 5 increases, and eventually this internal pressure rises to a value approximately equal to the predetermined internal pressure of the oil (note that air exists within the discharge pipe 5). (If this air is also compressed, it will have an internal pressure equal to the predetermined internal pressure of the oil). The internal pressure within the discharge pipe 5 corresponding to the internal pressure of this oil (hereinafter the internal pressure within the discharge pipe 5 is simply referred to as internal pressure) is the internal pressure of the discharge pipe 5.
is applied equally to the inside of diaphragm 1, and therefore diaphragm 1
Internal pressure is also applied to the valve body 1 and the valve body 6.

Since the pressure-receiving area D ₁ of the diaphragm 11 is selected to be larger than the pressure-receiving area D ₂ of the valve body 6, the force caused by the internal pressure to displace the diaphragm 11 in the direction of arrow C in the figure is caused by the internal pressure displacing the valve body 6. The biasing force of the biasing means 13 is larger than the force that attempts to displace the diaphragm 1 in the direction of arrow B in the figure, and the biasing force of the biasing means 13 is such that the internal pressure
1 is selected to be smaller than the force that tends to displace it in the direction of arrow C, the diaphragm 11 is displaced in the direction of arrow C against the biasing means 13 due to the internal pressure of the oil, and along with this, the diaphragm 11 is displaced in the direction of arrow C. is displaced to the valve opening position where the discharge port 10 is opened. This state is shown in FIG.

When the valve body 6 is moved to the open position and the discharge port 10 is opened, the oil passes through the conduit 7, the inlet 7a, and the discharge pipe 5, and is discharged from the discharge port 10. At this time, since the opening position of the valve body 6 is within the discharge pipe 5, there is nothing that obstructs the flow of the oil discharged from the discharge port 10, and therefore the oil is smoothly supplied without scattering. . Accordingly, the internal pressure decreases, but at this decreased internal pressure value, a force generated by this internal pressure tends to displace the diaphragm 11 in the direction of arrow C in the figure (hereinafter this force is referred to as force F ₀ ).
is a force generated by internal pressure that attempts to displace the valve body 6 in the direction of arrow B in the figure (hereinafter, this force is referred to as force _F1 ), and a flow of oil discharged from the discharge port 10 causes the valve body 6 to move in the direction of arrow B. The pressure-receiving areas D 1 and D are adjusted to have a value equal to the resultant force of the force applied by the urging means 13 (hereinafter referred to as force F ₂ ) and the urging force exerted by the urging means ₁₃ (hereinafter referred to as force F ₃ ). ₂ is selected, the valve body 6 maintains the open position when discharging oil (during refueling work). Therefore, smooth refueling work can be performed.

When stopping the discharge (when finishing the refueling operation), the nozzle lever 4 is opened. When the nozzle lever 4 is opened, the main valve 3 is displaced by the force of the spring 8, and the inlet port 7 is displaced.
a and the nozzle lever 4 also closes the shaft 9.
is pressed and returns to the position before starting the refueling operation. Immediately after the main valve 3 closes the inlet 7a, the valve body 6
is in the valve open position, and the oil in the discharge pipe 5 continues to be discharged from the discharge port 10. Therefore, the internal pressure inside the discharge pipe 5 decreases rapidly, and the forces F ₀ , F ₁ ,
The value of F ₂ becomes zero, and only the biasing force F ₃ from the biasing means 13 acts on the valve body 6, and the valve body 6 is biased in the direction of arrow B in the figure and displaced to the valve closing position where the discharge port 10 is closed. do. Note that since the rod 12 is guided by the guide member 14, the valve body 6 is securely connected to the discharge pipe 5.
Because it comes into contact with the valve seat of the discharge port 10 from the inside of the
Oil liquid will not leak from the blocked discharge port 10. Further, the time from when the main valve 3 closes the inlet 7a to when the valve body 6 closes the discharge port 10 is extremely short because the internal pressure inside the discharge pipe 5 decreases rapidly. The oil remaining in the discharge pipe 5 after the lever 4 is opened does not flow out from the discharge port 10 unnecessarily. As mentioned above, the valve opening position of the valve body 6 is within the discharge pipe 5 when discharging the oil liquid, and the valve body 6 does not protrude beyond the protrusion port 10 as in the conventional case. Smooth lubrication can be achieved even when lubrication is performed by inserting into an inlet or a bent inlet.

A second embodiment of the refueling nozzle according to the present invention will be described with reference to FIG. Note that the same components as those in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

In the figure, reference numeral 16 denotes a conventional oil supply nozzle that does not have a valve body for preventing dripping in the discharge pipe portion 16a, and a screw 16b is threaded in a predetermined range of the outer periphery of the distal end of the discharge pipe portion 16a. A discharge pipe 17 is fluid-tightly connected to the discharge pipe portion 16a by a known sealing means (not shown). The discharge pipe 17 is provided with an inflow pipe 17a having an inlet 7a through which oil flows.
A screw 17b that can be screwed into the screw 16b is threaded on the inner wall of the housing. By screwing these screws 16b and 17b together, the discharge pipe 17 is connected and integrated with the oil supply nozzle 1. Therefore, by attaching the discharge pipe 17 to the oil supply nozzle 16, which does not have a conventional valve body for preventing dripping, it is possible to prevent dripping and to perform a smooth refueling operation without causing the discharged oil to scatter. It is possible to easily realize a refueling nozzle 18 that can be used.

Reference numeral 19 is an adjusting means for the upper wall 1 of the discharge pipe 17.
7c so that its position can be adjusted in the vertical direction, and its lower end is in contact with the biasing means 13.By displacing this adjustment means 19, the biasing force generated on the biasing means 13 can be adjusted. It becomes possible. Therefore, in addition to adjusting means that cannot be changed once set, such as the pressure receiving area of the diaphragm 11 and the valve body 6, there is also an adjustment that can arbitrarily adjust the timing at which the valve body 6 opens and closes. By providing the means 19, even when the internal pressure of the oil flowing into the discharge pipe changes, it is possible to always adjust the discharge state to an appropriate state.

Note that in both of the above embodiments, the partition wall is constituted by a diaphragm that bends due to the pressure of the oil liquid, but the partition wall is not limited to the above-mentioned diaphragm as long as it is displaced by the pressure of the oil liquid.

Effects of the invention According to the refueling nozzle of the invention as described above,
A valve seat is provided at the discharge port at the tip of the discharge pipe, and a valve body that opens and closes the discharge port by contacting or separating from the valve seat from the upstream side is housed in the discharge pipe, and when the main valve of the nozzle is closed. When the valve body is moved to the closed position where it contacts the valve seat by the biasing means and the discharge port is closed, and when the main valve of the refueling nozzle is opened, the oil flows in from the base end of the discharge pipe. By displacing the valve body against the urging means by the pressure of the oil liquid to the valve opening position inside the discharge pipe spaced from the valve seat, the discharge port is opened. Since the valve opening position is inside the discharge pipe, the oil discharged from the discharge port does not collide with the valve body and scatter as in the conventional case, and is smoothly refilled into the oil tank etc. It is possible to prevent air from entering the oil liquid and dirt near the inlet due to the scattering of oil.
In line with this, smooth refueling can be performed even in narrow or curved inlet ports, and the discharge nozzle with the valve element of the present invention can be used in place of a refueling nozzle that does not have a valve element to prevent dripping. By attaching this, it is possible to realize a refueling nozzle that can easily prevent dripping and can also prevent the discharged oil from scattering.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the first embodiment of the refueling nozzle according to the present invention, Fig. 2 is a longitudinal sectional view showing the valve body in the open position in Fig. 1, and Fig. 3 is a longitudinal sectional view of the first embodiment of the refueling nozzle according to the present invention. FIG. 3 is a partial cross-sectional view of a second embodiment of the refueling nozzle. 1, 16, 18... Refueling nozzle, 2... Nozzle body, 3... Main valve, 5, 17... Discharge pipe, 6
... Valve body, 10 ... Discharge port, 11 ... Diaphragm, 13 ... Biasing means, 19 ... Adjustment means.

Claims (1)

[Claims for Utility Model Registration] A refueling nozzle in which a valve body that opens and closes according to the pressure of inflowing oil is provided in a discharge pipe, wherein a valve seat is provided at a discharge port at the tip of the discharge pipe, and a valve seat is provided in the discharge pipe. houses a valve body that opens and closes the discharge port by contacting or separating from the valve seat from the upstream side of the valve seat, and is connected to the valve body, and the discharge pipe has a base end side of the discharge pipe. a partition wall that is displaced in response to the pressure of the oil fluid flowing in, and a biasing means is provided on the valve body or the partition wall for biasing the valve body to a closed position in which it abuts the valve seat, The valve body is moved away from the valve seat against the biasing means as the partition wall is displaced by the pressure of the oil flowing in from the base end side of the discharge pipe, and opens the discharge port. The oil supply nozzle is configured such that when the inflow of oil fluid is stopped, the urging means contacts the valve seat and closes the discharge port.