JPS6227360B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a switching valve for a fuel transfer system used in a fuel chamber of an underwater vehicle.

[Prior Art] As shown in Fig. 2, an underwater vehicle a generally includes a front fuel chamber b, a rear fuel chamber c, and an engine d.
The front fuel chamber b and the rear fuel chamber c are connected by a suction pipe e, while the front fuel chamber b and the engine d are connected to a fuel supply pipe g with a fuel pump f interposed therebetween. I have been contacted.

In addition, the underwater vehicle a in the upper part of the rear fuel chamber c
The outer shell includes the exterior of the underwater vehicle a and the rear fuel chamber c.
A seawater inlet h is formed to communicate with the seawater.

In addition, the suction port of the suction pipe e in the rear fuel chamber c
e' is arranged to open near the center of the bottom of the rear fuel chamber c.

With such a fuel transfer system, the engine d is transferred from the front and rear fuel chambers b and c in the following manner.
Fuel j is supplied to

Before the underwater vehicle a travels, the front and rear fuel chambers b and c are filled with fuel j, and as the underwater vehicle a travels, this fuel j is pumped by the fuel pump f. From the rear fuel chamber c to the suction pipe e and the front fuel chamber b
and is supplied to the engine d via the fuel supply pipe g.

When fuel j is consumed during cruising, in order to compensate for the decrease in fuel j in the rear fuel chamber c,
Seawater k flows into the rear fuel chamber c from a seawater inlet h.

Note that since the fuel j used has a specific gravity greater than that of the seawater k, the seawater k is always located above the fuel j in the rear fuel chamber c.

In this way, the liquid level of fuel j is raised to the rear fuel chamber c.
The fuel j continues to be transferred to the front fuel chamber b through the suction pipe e until reaching a position below the suction port e' of the suction pipe e.

Note that the arrows in FIG. 2 indicate the direction of flow of fuel and seawater.

[Problem that the invention seeks to solve]

However, in such a conventional fuel transfer system for an underwater vehicle, when the remaining amount of fuel j in the rear fuel chamber c is low, the underwater vehicle a tilts in order to travel in a downward or upward direction. In this case, the interface between the fuel j and seawater k in the rear fuel chamber c is inclined with respect to the longitudinal axis of the underwater vehicle, and the rear fuel chamber c
Suction port of suction pipe e provided near the center of the bottom of
It will move away from e′.

Therefore, even though fuel j remains in the rear fuel chamber c, seawater k is sucked in from the suction port e', and the front fuel is drawn from the rear fuel chamber c through the suction pipe e. There is a problem that fuel j cannot be continuously supplied to chamber b, and the consumption efficiency of fuel j decreases.

The present invention is an attempt to solve these problems, and even when the underwater vehicle is tilted with a low amount of fuel remaining, only fuel is sucked from the fuel chamber. An object of the present invention is to provide a fuel transfer system switching valve for an underwater vehicle that improves fuel consumption efficiency in a fuel chamber.

[Means for solving problems]

Therefore, the fuel transfer system switching valve for an underwater vehicle according to the present invention is arranged approximately horizontally in the fuel chamber of the underwater vehicle, and has two inlet ports on the lower side and one outlet port on the upper side. a spool that is fitted into the cylinder and can be switched to communicate either one of the two inlet ports with the outlet port; a fuel delivery pipe connected to the outlet port; two fuel outlet pipes connected to the two inlet ports and opening at the bottom front end and the bottom rear end of the fuel chamber,
In order to drive the spool according to the inclination of the fuel chamber and the cylinder with respect to the fuel level in the fuel chamber to open one of the two inlet ports and close the other, the spool is moved inside the spool along the direction of movement thereof. The spool is characterized by being provided with a formed passageway and a movable member that can move within the passageway and apply an impact force to the spool.

[Effect]

In the above-mentioned fuel transfer system switching valve for an underwater vehicle of the present invention, when the underwater vehicle is tilted, the spool in the cylinder moves and the fuel removal pipes opened at the front and rear ends of the bottom of the fuel chamber are moved. Since one of the two is in communication with the fuel delivery pipe, fuel can always be transferred to the engine even if the underwater vehicle is tilted with little fuel remaining.

〔Example〕

Hereinafter, a fuel transfer system switching valve for an underwater vehicle as an embodiment of the present invention will be explained with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a fuel chamber equipped with the switching valve. The right direction is defined as the front of the underwater vehicle, and FIG. 1 shows the fuel chamber of the underwater vehicle in a descending state.

As shown in FIG. 1, in a fuel chamber 1 of an underwater vehicle, a hollow cylinder 2 whose both ends are closed is arranged parallel to the longitudinal axis of the underwater vehicle.

This cylinder 2 has two
It has two inlet ports 3, 3' and one outlet port 4 on the upper side.
and 3' have fuel outlet pipes 5 and 5' that open at the bottom front end and the bottom rear end of the fuel chamber 1, respectively.
is connected to the outlet port 4, and a fuel delivery pipe 6 is connected to the outlet port 4 so as to be able to transfer the fuel 13 to another fuel chamber (not shown) provided inside the underwater vehicle (see FIG. 2). .

Note that the inlet ports 3 and 3' are formed in a circular shape, while the outlet port 4 is formed in an oval shape and faces the two inlet ports 3 and 3' at a position directly above the two inlet ports 3 and 3'. It is formed like this.

Incidentally, a cylindrical spool 7 having a constricted portion 7' having a length equal to the diameter of the inlet ports 3, 3' is fitted in the center of the cylinder 2. is switched so that either one of the two inlet ports 3, 3' communicates with the outlet port 4 via the constricted portion 7'. That is, as shown in FIG. 1, when the inlet port 3 and the outlet port 4 are communicated through the constricted portion 7', the other inlet port 3' is closed by the side surface of the cylindrical portion of the spool 7. It's getting old. At this time, one end surface of the spool 7 is in contact with an end surface inside the cylinder 2.

Further, inside the spool 7, a passage 8 having a circular cross section with both ends closed is formed along the moving direction of the spool 7, and a metal ball 9 as a movable member is inserted into the passage 8. It is set up so that you can move around inside.

In addition, in order to reduce the frictional resistance caused by the fluid in the passage 8 when the metal ball 9 moves, small diameter communication holes 1 are provided at both ends of the passage 8 that communicate with the outside of the spool 7.
A plurality of 0's are formed.

Then, with respect to the liquid level of the fuel 13 in the fuel chamber 1,
When the fuel chamber 1 and the cylinder 2 are inclined, the spool 7 moves within the cylinder 2 due to its own weight in accordance with the inclination, and the metal ball 9 also moves within the passage 8 of the spool 7 due to its own weight. At this time, metal ball 9
moves more smoothly than the movement of the spool 7 within the cylinder 2, and by colliding with the end face of the passage 8, an impact force is applied to the spool 7.

A seawater inlet 11 is provided in the outer shell of the underwater vehicle above the fuel chamber 1, through which seawater 12 flows.

Since the fuel transfer system switching valve for an underwater vehicle according to the present invention is constructed as described above, the underwater vehicle can be operated when the remaining amount of fuel 13 in the fuel chamber 1 is small, as shown in FIG. Inclining (travels in the downward direction in Figure 1)
In this case, the spool 7 is connected to the fuel 13 in the fuel chamber 1.
According to the inclination of the fuel chamber 1 and the cylinder 2 with respect to the liquid level, the impact force of the metal ball 9 causes the cylinder 2 to
The fuel outlet pipe 5 and the fuel delivery pipe 6, which are opened at the front end of the bottom of the heating chamber 1, communicate with each other through the constricted portion 7'.

Therefore, as shown by the arrow in FIG. 1, the fuel 13 accumulated at the front bottom of the fuel chamber 1 is pumped through the fuel outlet pipe 5, the constriction 7' and The fuel is sucked up through the fuel delivery pipe 6 and transferred to other fuel chambers or engines within the underwater vehicle.

On the other hand, when the underwater vehicle travels in an upward direction, the spool 7 moves in the same manner as described above, and the fuel take-out pipe 5' and the fuel delivery pipe 6, which open at the bottom rear end of the fuel chamber 1, are moved. are switched so that they communicate. In addition, when an underwater vehicle travels in a horizontal state,
Either one of the fuel outlet pipes 5, 5' is always in communication with the fuel delivery pipe 6 via the constricted portion 7'.

In this manner, the switching valve of the present invention allows the fuel 13 to be constantly transferred to the engine even when the underwater vehicle is tilted with a small amount of fuel remaining.

In this embodiment, the spool 7 is configured to have a cylindrical shape and a constricted part 7' in the center, but it moves due to weight and is inserted into either one of the two inlet ports 3, 3' of the cylinder. It may have any shape as long as it can communicate with the outlet port 4. For example, it may be configured as a small diameter cylinder having a large diameter part inscribed in the cylinder 2 in the center. In this case, the fuel take-off pipe 5 that opens at the front end of the bottom of the fuel chamber 1 is connected to the inlet port formed at the rear end of the cylinder 2, and the fuel take-off pipe 5' that opens at the rear end of the bottom of the fuel chamber 1 connects to the inlet port formed at the rear end of the cylinder 2. The large diameter part of the spool 7 closes the inlet port at the front end when the underwater vehicle is tilting forward, and closes the inlet port at the rear end when the underwater vehicle is tilting backward. Do it like this.

〔Effect of the invention〕

As described in detail above, according to the fuel transfer system switching valve for an underwater vehicle of the present invention, the switching valve for the fuel transfer system of an underwater vehicle is arranged approximately horizontally in the fuel chamber of the underwater vehicle, has two inlet ports on the lower side, and has two inlet ports on the upper side. a cylinder having one outlet port; a spool that is fitted into the cylinder and can be switched to communicate one of the two inlet ports to the outlet port; and a spool connected to the outlet port. The fuel chamber is provided with a fuel delivery pipe and two fuel outlet pipes that are connected to the two inlet ports and open at the bottom front end and the bottom rear end of the fuel chamber, respectively, and which are connected to the two inlet ports and open at the bottom front end and the bottom rear end of the fuel chamber, respectively. and a passage formed inside the spool along the direction of movement of the spool, and a passage within the passage in order to drive the spool according to the inclination of the cylinder to open one of the two inlet ports and close the other. It has a simple configuration in which a movable member that can apply an impact force to the spool is installed, so that even if the underwater vehicle tilts with a small amount of fuel remaining in the fuel chamber, it is possible to connect either of the two fuel outlet pipes. Since one side is always switched to be open to the fuel portion in the fuel chamber, it is possible to continuously supply fuel, which has the advantage of greatly increasing fuel consumption efficiency in the fuel chamber.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing a fuel chamber equipped with a fuel transfer system switching valve for an underwater vehicle as an embodiment of the present invention, and FIG. FIG. 1... Fuel chamber, 2... Cylinder, 3, 3'...
Inlet port, 4...Outlet port, 5, 5'...Fuel take-off pipe, 6...Fuel delivery pipe, 7...Spool,
7'... Constriction, 8... Passage, 9... Metal ball as a movable member, 10... Communication hole, 11... Seawater inlet, 12... Seawater, 13... Fuel.

Claims (1)

[Claims] 1 A cylinder arranged almost horizontally in the fuel chamber of an underwater vehicle and having two inlet ports on the lower side and one outlet port on the upper side, and a cylinder that is inserted into the cylinder and has the above two ports. a spool that can be switched to communicate either one of the inlet ports with the outlet port; a fuel delivery pipe connected to the outlet port; Two fuel take-off pipes are provided that open at the rear end of the bottom, and one of the two inlet ports is opened by driving the spool according to the inclination of the fuel chamber and the cylinder with respect to the fuel liquid level in the fuel chamber. In order to close the other, a passage is formed inside the spool along the direction of movement of the spool, and a movable member that can move within the passage and apply an impact force to the spool is provided. Fuel transfer system switching valve for underwater vehicles.