JPH0127258B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a fuel valve injection system for testing three types of fuel valves: injection valves, safety valves with cylinder lids, and safety valves for fuel pumps, which are installed in Sulzer type large diesel engines installed on ships. This relates to a fuel valve high-pressure hand pump built into a test device.

B. Prior art A fuel valve injection test device for testing and adjusting the operating status of spare injection valves, safety valves with cylinder lids, and safety valves for fuel pumps that are normally installed on ships equipped with Sulzer type large diesel engines. is installed. During the voyage, maintenance and inspections are carried out using a fuel valve injection testing device to ensure that the spare injection valves, cylinder lid safety valves, and fuel pump safety valves are always in the best condition. Note that the fuel valve injection test device is used not only during navigation but also on land.

The fuel valve injection test device that performs the injection test of the fuel valve described above generally includes a plunger pump that supplies fuel to the fuel valve at a predetermined pressure, a driving device such as an air cylinder for driving the plunger pump, and the plunger pump. a fuel tank that stores the fuel supplied to the fuel valve by the plunger pump, a switching valve for switching the supply direction of the fuel discharged from the discharge hole of the plunger pump, and a fuel tank for further pressurizing the fuel discharged from the plunger pump to a predetermined pressure. It consists of a high-pressure hand pump for applying pressure.

When testing an injection valve or a safety valve with a cylinder lid using the fuel valve injection test device, after connecting the discharge hole of the plunger pump and the injection valve or safety valve with a cylinder lid via a switching valve and a high pressure hose, The fuel sucked up from the fuel tank by the plunger pump and discharged at a predetermined pressure is supplied to the injection valve or safety valve with cylinder lid via the switching valve and high pressure hose, and the injection valve or safety valve with cylinder lid is tested. It's on. Also, when testing the fuel pump safety valve, the discharge pressure from the plunger pump is not enough to apply sufficient pressure to the fuel pump safety valve, so the fuel discharged from the plunger pump is first transferred to the high-pressure hand pump via the switching valve. After the fuel is further pressurized to a predetermined pressure by a high-pressure hand pump, it is supplied to the fuel pump safety valve.

B. Object of the Invention The present invention provides a switching valve for switching the supply direction of fuel discharged from a discharge hole of a plunger pump built in the above-mentioned fuel valve injection test device, and a switching valve for switching the supply direction of fuel discharged from a discharge hole of a plunger pump built in the above-mentioned fuel valve injection test device. By integrating a high-pressure hand pump for further pressurization,
This makes it easy to incorporate a switching valve and a high-pressure hand pump into a fuel valve injection test device, and also makes it possible to downsize the fuel valve injection test device.

C. Structure of the Invention In order to connect a high-pressure hand pump with a switching valve to a small body having an inflow hole, an outflow hole, and a communication hole, and an inflow hole and an outflow hole or an inflow hole and a communication hole of the small body inserted into the small body. The Kotuku and the Kotuku body are integrated into one,
A fuel reservoir that communicates with a communication hole provided in the body through a check valve, a pump body that has a discharge hole that communicates with the fuel reservoir, and a tip that is housed within the pump body and that is press-fitted into the fuel reservoir. It consists of a high-pressure cylinder housing a plunger and an operating lever for press-fitting the plunger into the fuel reservoir.

D. Embodiment FIGS. 1 and 2 are drawings showing a high-pressure hand pump with a switching valve according to the present invention, which integrates a switching valve and a high-pressure hand pump. In the figure, reference numeral 1 denotes a small body for forming a switching valve, and 2 a pump body for forming a high-pressure hand pump. The small body 1 and the pump body 2 are integrally connected by bolts. 3 is a shaft rotatably inserted into the shaft body 1, 4 is an L-shaped hole bored in the shaft 3, 5 is a shaft integrally formed in the shaft 3, and 6 is at the tip of the shaft 5. This is an operating lever for rotating the fixed stick 3. 7 is an inflow hole drilled in Kotsukuku body 1, 8
is an outflow hole, and 9 is a communication hole, and the inflow hole 7, the outflow hole 8, and the communication hole 9 are arranged at right angles to each other. Then, rotate the pot 3 by 90 degrees and insert one open end of the L-shaped hole 4 provided in the pot 3 into the inflow hole 7.
Then, by connecting the other open end to the outflow hole 8 or the communication hole 9, the inflow hole 7 and the outflow hole 8, or the inflow hole 7 and the communication hole 9 are made to communicate with each other. Reference numeral 10 denotes a chuck body screwed onto the lock body 1 so as to communicate with the inflow hole 7; 11 a check valve interposed between the chuck body 10 and the inflow hole 7; 1;
Reference numeral 2 designates a high-pressure pipe connection portion screwed onto the pot body 1 so as to communicate with the outflow hole 8. Reference numeral 13 indicates a pin fixed to the root of the shaft 5 integrally formed with the handle 3, and 14 indicates two stoppers set on the surface of the handle body 1 from which the shaft 5 protrudes, and the pin 13 contacts these stoppers 14. As a result, the rotation angle of the kettle 3 is regulated. 1
5 is a high-pressure cylinder inserted into the pump body 2 via the cap screw 16; 17 is a plunger slidably inserted into the high-pressure cylinder 15; and 18 is a lower part of the pump body 2 for sliding the plunger 17 inside the high-pressure cylinder 15. An operating lever is rotatably connected to the lever via a pin 19, one end of which is in contact with the lower end of the plunger 17 via a roller 20, and the other end of which is connected to the lower end of the plunger 17 to facilitate operation of the operating lever 18. Fit the extension lever 21 for the purpose. 22 is the pump body 2 and the operating lever 18
The operating lever 18 is always pulled upward by this spring 22, and the operating lever 18 and the lower end contact each other, and the plunger 17 is normally located at the lower end side. There is. 23 is a fuel reservoir provided at the upper end of the high pressure cylinder 15 in the pump body 2;
4 is a communication hole drilled in the pump body 2 for communicating the fuel reservoir 23 and the communication hole 9 bored in the tank body 1; 25 is a check valve interposed at the connecting portion of the communication holes 9 and 24; , inside the fuel reservoir 23 is a plunger 1 inserted into the high pressure cylinder 15.
The tip of No. 7 enters. 26 is a discharge hole bored in the pump body 2 so as to communicate with the fuel reservoir 23, 27 is a high pressure joint screwed onto the pump body 2 so as to communicate with the discharge hole 26, and 28 is a high pressure joint between the discharge hole 26 and the high pressure joint. This is a relief valve that opens at a pressure of 80 kg/cm ² interposed between the This relief valve 28 is used when testing the fuel pump safety valve, when the fuel pump safety valve is defective and fuel leaks under no load, or when trial handling is performed without installing the fuel pump safety valve. The movement of the control lever 18 is too light and there is a large difference from the load state, and in order to prevent the operation of the control lever 18 from going out of order, it acts as a relief to keep a pressure of about 80 kg/cm ² constantly applied.

When incorporating the high-pressure hand pump with switching valve configured as described above into a fuel valve injection test device, the chuck body 10 communicating with the inflow hole 7 of the high-pressure hand pump with switching valve is connected to the discharge port of the plunger pump, and the outflow port is connected to the discharge port of the plunger pump. The high pressure pipe connection part 12 communicating with 8 is connected to a high pressure hose whose tip is connected to an injection valve or a safety valve with a cylinder lid, and the high pressure joint 27 communicating with the discharge hole 26 is connected to a high pressure hose whose tip is connected to a fuel pump. Incorporate it into the fuel valve injection test equipment by connecting it to the high pressure piping connected to the safety valve.

When sending the fuel discharged from the plunger pump of the fuel valve injection test device to the high pressure hose that communicates with the injection valve or the safety valve with cylinder lid, rotate the cock 3 clockwise in Fig. The inflow hole 7 and the outflow hole 8 are communicated with each other through the shaped hole 4, and the fuel discharged from the plunger pump of the fuel valve injection test device is supplied to the high pressure hose.

Furthermore, when further pressurizing the fuel discharged from the plunger pump using a high-pressure hand pump and supplying it to the fuel pump safety valve, first rotate the fuel pump 3 counterclockwise in FIG. The hole 4 allows the inflow hole 7 and the communication hole 9 to communicate with each other. When fuel is discharged from the plunger pump in this state, the discharged fuel flows into the fuel reservoir 23 through the chuck body 10, the inflow hole 7, the L-shaped hole 4, and the communication holes 9 and 24. Then, after pushing down the plunger 17 of the device of the present application whose tip protrudes into the fuel reservoir 23 to the lower end, the check valve 28 is opened, and the fuel is passed through the high pressure pipe from the discharge hole 26 and the high pressure joint 27 to the safety valve for the fuel pump. Fuel reaches. When fuel reaches the fuel pump safety valve in this way,
Push down the extension lever 21 fitted to the operating lever 18 of the high-pressure hand pump with a switching valve, push up the plunger 17 that is in contact with one end of the operating lever 18 via the roller 20, and use the tip of the plunger 17 to release the fuel. By pressurizing the fuel into the reservoir 23, the fuel reaching the fuel pump safety valve is pressurized to a predetermined high pressure.

E. Effects of the Invention As described above, by integrating the switching valve built into the fuel valve injection test device and the high-pressure hand pump, there is no need to connect the switching valve and the high-pressure hand pump within the fuel valve injection test device. Therefore, the assembly work of the fuel valve injection test device can be simplified. Furthermore, by integrating the switching valve and the high-pressure hand pump, the storage space for both can be reduced within the fuel valve injection test apparatus, making it possible to downsize the fuel valve injection test apparatus.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of a high-pressure hand pump with a switching valve, and FIG. 2 is a side sectional view. 1...Kottoku body, 2...Pump body, 3...Kottoku, 7...Inflow hole, 8...Outflow hole, 9...Communication hole, 15...High pressure cylinder, 17
...Plunger, 18...Operation lever, 23...
Fuel reservoir, 25... check valve, 26... discharge hole.

Claims (1)

[Claims] 1. A switching valve that switches the supply direction of fuel discharged from a plunger pump of a fuel valve injection test device;
In a high-pressure hand pump with a switching valve that is integrated with a high-pressure hand pump that further pressurizes fuel sent from a plunger pump via a switching valve, the high-pressure hand pump with a switching valve is connected to an inflow hole, an outflow hole, A body having a communication hole, a body inserted into the body for communicating between the inflow hole and the outflow hole of the body, or the inflow hole and the communication hole, and a body integrally connected to the body.
A fuel reservoir that communicates with a communication hole provided in the body through a check valve, a pump body that has a discharge hole that communicates with the fuel reservoir, and a tip that is housed within the pump body and that is press-fitted into the fuel reservoir. A high-pressure hand pump with a switching valve, comprising a high-pressure cylinder housing a plunger and an operating lever for press-fitting the plunger into a fuel reservoir.