JPS6033344Y2 - Control valve device for starting air-start engines - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a compressed air starting device, and in particular, improvements have been made to the starting control valve that operates the blocking valve that controls the flow of compressed air, making it possible to remotely control the starting control valve. This invention relates to a starting control valve device.

Devices that start an internal combustion engine using compressed air can be roughly divided into two types: those that use an air motor that is rotated by compressed air in a similar manner to a starter motor, and those that feed compressed air directly into the engine's cylinders and use the expansion force to start the piston. However, in either case, high-pressure air is used, so if a solenoid valve is used to control the flow rate, it will be extremely expensive and large, and it will require a large amount of space between the fluid line and the electrical line. Generally, the control of such compressed air starting devices uses a mechanical type or a combination of this and a fluid type because of the problems such as complicated operation and maintenance and loss of electrical energy. However, due to such circumstances, the automation or remote control of compressed air starters has been delayed.

The outline of such a conventional compressed air starting device will be explained using FIG. It communicates with the starting control valve 5 through the
It communicates with the outlet pipe 8 of the stop valve 2 through an on-off valve 7 operated by the on-off piston 6 in the above-mentioned stop valve 2, and the air chamber 9 of the on-off piston 6 and the start control valve 5 are connected by a pipe 10. ing.

In addition, the outlet pipe 8 includes a pipe 11 and a cylinder head 12.
It communicates with the upper chamber 15 of the starting valve 14 through an air passage 13, and also communicates with a starting air distribution valve (not shown) through a piping 16, and the outlet of the starting air distribution valve communicates with the piping 17 and the air passage 18. It communicates with the upper chamber 20 of the opening/closing piston 19 connected to the starting valve 14 through the opening/closing piston 19 .

Therefore, when the control lever 22, which has a protrusion 21 at its base, is rotated to the starting position a, the protrusion 21 pushes the valve pusher rod 23 to the left, the valve body 24 is opened, and the compressed air stored in the starting air tank is released into the position 1. Start control valve 5 through joint 3 and piping 4
The air passes through the pipe 10 and enters the air chamber 9, the opening/closing piston 6 is pushed up, and the opening/closing valve 7 is opened.

Then, the compressed air in the joint 3 passes through the on-off valve 7 and enters the outlet pipe 8, a part of which passes through the air passage 13 of the pipe 11 and enters the upper chamber 15 of the starter valve 14, and the remaining compressed air flows from the pipe 16. Piping 17, air passage 18 through the starting distribution valve
Since the compressed air in the upper chamber 15 enters the upper chamber 20 of the opening/closing piston 19 and pushes down the opening/closing piston 19 to open the starting valve 19, the compressed air in the upper chamber 15 flows into the cylinder through the opened starting valve 19 and starts the engine. It is.

As described above, since the starting control valve 5 is conventionally operated by the control lever 22 or a mechanical manual mechanism similar to a knead, the starting control valve cannot be remotely controlled, which prevents automation of the compressed air starting device. ing.

The present invention improves the starting control valve in order to eliminate the drawbacks of the conventional compressed air starting device described above. a first air introduction section for driving air for driving the blocking valve, a second air introduction section for driving air for driving the blocking valve, and an air outlet section communicating therewith; A piston actuated by control air flowing in from the air outlet, and a control valve actuated by the piston to establish communication or a closed state between the second air introduction part and the air outlet part. The present invention provides a starting control valve device for an air-start engine.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings starting from FIG.

Here, FIG. 2 is a side sectional view of a starting control valve according to an embodiment of the present invention, FIG. 3 is a side view including a partial cross section of an example of a blocking valve driven by the same control valve, and FIG. is a pneumatic circuit diagram of a compressed air starter using the same control valve and blocking valve.

In these figures, the control valve main body 25 includes the start control valve 2.
6 itself, a first air introduction hole 27 into which control air flows, and a second air introduction hole 28 into which driving air flows in which drives a blocking valve 60, which will be described later. An air outlet hole 29 is formed through which the compressed air flowing in through the air introduction hole 28 flows out, and a valve chamber 31 is connected to the second air introduction hole 28 and houses a valve spring 30 therein.
and a cylinder 33 communicating with the first air introduction hole 27 and into which a cylindrical piston 32 is slidably and tightly inserted are provided coaxially.

A valve integrated with a control valve 35 that closes the entrance of the sliding hole 34 is provided in the valve stem sliding hole 34 that linearly connects the cylinder 33 and the valve chamber 31. A rod 36 is slidably and tightly inserted, and a portion of the valve rod 36 near the control valve 35 is made thinner than the other portion, forming a gap 37 between it and the valve rod sliding hole 34. The air gap 37 and the air outlet hole 29 communicate with each other through an air passage 38, and the valve stem 3
The head 39 of the piston 32 coaxially faces the head plane 40 of the piston 32 with a small gap, and the control valve 35 is located in the valve chamber 2.
A valve spring 30 coaxially compressed within the valve stem 4 is constantly pressed toward a valve seat 41 provided at the entrance of the valve stem sliding hole 34.

Further, a rod 45 inserted into a through hole 42, 43 formed in the control valve body 25 and having a collar 44 in the middle is always supported by a spring 46.
The collar 44 is urged to be pressed against the entrance end 47 of the through hole 42, and in this state, the rod 4
The head 48 of the piston 32 coaxially faces the bottom plane 49 of the piston 32 through a slight gap, and the control valve body 25
At the base of the manual operation bundle 52, which is rotatable around a locking pin 51 provided on an arm 50 fixed to the left end of the arm 50, when the bundle 52 is rotated, the end 53 of the opening rad 45 is attached.
A protrusion 54 is provided which abuts against and pushes the rod 45 in the direction of the piston 32 .

Further, the piston 32 has an annular recessed groove 55 on its outer periphery that communicates with the first air introduction hole 27 through an air passage 57.
A plurality of pressurized chambers 56 are provided which open toward the bottom plane 49 and communicate with the recessed groove 55, and a small hole 59 leading from the pressurized chambers 56 to a drain 58 is connected to the piston. It is perforated in the upper surface of 32.

The blocking valve 60 connected to the above-mentioned starting control valve 26 is the third
As shown in the figure, the starting control valve 26 is located at the bottom of the valve body 61.
It has an air inlet 62 through which driving air is introduced, and an on-off valve 64 that can slide in close contact with the valve hole 63 is inserted into a valve hole 63 that communicates with the air inlet 62. There is.

Further, a stop valve 70 which is always urged toward the valve seat 69 by a compression spring 68 is provided in a valve chamber 67 that communicates with the starting air tank through a pipe 65 and a joint 66. A valve rod 72, which is coaxially integral with the rod 71, is coaxially and closely slidably inserted into a sliding hole 73 having the valve seat 69 as its inlet number.
In the closed state shown in the figure, the tip 71 of the opening/closing valve 64 is coaxially engaged with the head 75 of the on-off valve 64 through a small gap, and the gap 76 between the upper thin rod 71 and the sliding hole 73 is The sliding hole 73 is in communication with a pipe 78 that sends compressed air to a starting valve and a starting air distribution valve of a cylinder head (not shown) through a communicating hole 77 provided on the side surface of the sliding hole 73 .

A pipe 79 is connected to the joint 66 for delivering air in the pipe 65 to the first air introduction hole 27 of the starting control valve 26.

Next, the operation of the above embodiment will be explained.

As shown in FIG. 4, the compressed air from the starting air tank passes through the piping 65 and reaches the stop valve 60 through the joint 66 and into the piping 79.
After that, the pressure is reduced to about 10 kg/self by a pressure reducing valve 80, and the pressure is reduced to a solenoid valve 81.

The solenoid valve 81 is actuated by a switch installed in the cockpit or other arbitrary location, and when the solenoid valve 81 is opened, the compressed air for controlling the control valve passes through the quick exhaust valve 82 and the piston pump 83 to the first control valve 26. The air flows into the air introduction hole 27, passes through the air passage 57 and the recessed groove 55, and enters the pressure chamber 56, increasing the pressure there and causing the piston 32 to slide to the right.

The sliding piston 32 hits the valve stem 36 and opens the control valve 35 against the force of the valve spring 30.

Then, the compressed air for driving the blocking valve before depressurization flows through the pipe 84 into the second air introduction hole 28 of the start operation valve 26, passes through the opened operation valve 35, enters the gap 37, and then the air It enters the air introduction hole 62 of the blocking valve 60 through the passage 38, the air outlet hole 29, and the piping 85, and pushes the on-off valve 64 upward.

The pushed opening/closing valve 64 further pushes up the valve stem 72, so that the blocking valve 70 is opened against the compression spring 68, and the high pressure compressed air that enters the valve chamber 67 from the joint 66 closes the opened blocking valve 70. After passing through and entering the cavity 76, the communication hole 77
, pipe 78 to the starting air distribution valve and starting valve to start the engine.

When the solenoid valve 81 is closed by switching the switch, the supply of air to the pressure chamber 56 is cut off, and the air in the pressure chamber 56 gradually flows out through the pores 59, so the pressure in the pressure chamber 56 decreases and the control valve closes. 35 is closed by the force of the valve spring 30, the blocking valve 70 is also closed at the same time, and the supply of compressed air from the starting air tank to the engine is cut off.

Also, if necessary, manually rotate the manual operation bundle 52 to push the rod 45 with the protrusion 54 and push the piston 32.
It is also possible to open and close the control valve 35 manually by sliding it to the right, and if a solenoid valve 81 that can withstand high pressure is used, the pressure reducing valve 80 is not necessary.

As described above, the present invention is equipped with a piston operated by compressed air, which controls the control valve. By interposing a solenoid valve, the control valve can be controlled remotely, and the compressed air starter Automation is now possible.

Furthermore, the rod and bundle mechanism for pushing the piston can also be installed internally, and the control valve can also be opened and closed manually.

[Brief explanation of the drawing]

Figure 1 is a system diagram showing the entire conventional compressed air starting device.
Fig. 2 is a side sectional view of a starter control valve which is an embodiment of the present invention, Fig. 3 is a side view including a partial cross section of an example of a stop valve driven by the control valve, and Fig. 4 is the same. FIG. 2 is a pneumatic circuit diagram of a compressed air starter using a control valve and a blocking valve. 25...Control valve body, 26...Start control valve, 27...First air introduction part (hole), 28
...Second air introduction part (hole), 29...
・Air outlet part, 32... Zeston, 35...
... Control valve, 60... Blocking valve.

Claims (1)

[Scope of utility model registration request] A starting control valve device for opening and closing a blocking valve provided in a starting air pipe connecting a starting air tank and an engine,
The control valve device includes a first air introduction section for control air, a second air introduction section for drive air, and an air outlet communicating with the first air introduction section for control air in the control valve main body, and further includes the above-mentioned first air introduction section in the control valve main body. A piston that is actuated by control air flowing in from the first air introduction part, and a control valve that is actuated by the piston to establish communication or a closed state between the second air introduction part and the air outlet part. A control valve device for starting an air-start engine, characterized by: