JPS581074Y2 - valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve device, and more particularly to a valve device that can be applied to detecting derailment of a vehicle or the like and controlling it thereafter.

For example, in railway vehicles, derailment accidents can cause serious damage to people and property, and although various measures have been taken to prevent them, sometimes they are unavoidable. .

Therefore, once a derailment accident occurs, it is necessary to detect it early and take appropriate measures.For this reason, in addition to derailment prevention means, derailment detection means and braking means activated by this derailment detection means are also required. It is essential for seed vehicles.

By the way, when a derailment occurs, the impact generally applies a fairly large acceleration in the vertical direction to the vehicle, so if this acceleration is detected and the brakes are automatically applied to the vehicle, it will prevent rollover accidents caused by the derailment. In this way, human and property damage caused by derailment accidents can be minimized.

From this point of view, various proposals regarding this type of detector have been made, but none of them are satisfactory in terms of reliability and the like.

The present invention was devised in view of the above points, and its purpose is to provide a highly reliable valve device that can be applied to the detection of derailment of vehicles, etc. and subsequent control. It's about doing.

Next, a preferred specific example of the present invention will be explained based on the drawings.

In FIG. 1, 1 is a main body formed in a substantially cylindrical shape, and this main body 1 includes an inlet hole 2 through which compressed air is supplied, a piston storage chamber 3, a valve storage chamber 4, and a weight. A storage chamber 5 and an outlet hole 6 for discharging compressed air to the atmosphere are provided.

7 is an orifice that communicates the passage 8 that communicates with the artificial hole 2 with the upper part of the chamber 3, and the compressed air introduced into the upper part of the chamber 3 through this orifice 7 can move up and down within the chamber 3. The piston 9 is urged downward.

Reference numeral 10 denotes a protrusion extending from the main body 1, and this protrusion 10 limits the upward displacement of the histone 9.
Orifice 7 and passage 1 at upward displacement of piston 9
This prevents the opening end of chamber 3 from being clogged.

A valve 12 is connected to the piston 9 via a valve stem 13, and a valve seat 14 is fixed to the lower surface of the valve 12.

15 is a coil spring provided between the upper surface of the valve 12 and the main body 1 to urge the valve 12 downward.

16 is a hole provided in the main body 1 to communicate the lower part of the chamber 3 and the chamber 4, and compressed air supplied to the artificial hole 2 is introduced into the chamber 4 through the hole 16. ,ru.

Reference numeral 17 denotes a hole that communicates with the chamber 4 when the valve 12 is moved upward, and this hole 17 also communicates with the chamber 5. At this time, the compressed air pressure in the upper part of the chamber 3 on the one hand, so that the downward force acting on the valve 12 and the piston 9 due to the extension force of the spring 15 is greater than the upward force acting on the piston/9 due to the compressed air pressure in the lower part of the chamber 3. , the extension force of the spring 15 such that the downward force acting on the valve 12 due to the extension force of the spring 15 is smaller than the upward force acting on the piston 9 due to the compressed air pressure in the lower part of the chamber 3; Assuming that the pressure receiving area for the compressed air on the upper and lower surfaces of the piston S9 is set, if the compressed air is introduced into the upper part of the chamber 3, then the piston 9
and the valve 12 is moved downwards so that the valve seat 14 of the valve 12
is in contact with the body 1 to prevent communication between the chamber 4 and the hole 17, while compressed air is introduced into the upper part of the chamber 3.
That is, when the upper part of the chamber 3 is substantially opened to the atmosphere,
Piston 9 and valve 12 are moved upwards so that valve 12
The valve seat 14 no longer contacts the main body 1 to communicate the chamber 4 and the hole 17.

Next, 18 is a valve opening control member, and this member 18 is provided so as to be able to move from side to side within the chamber 19.

Further, one end 20 of this member 18 is provided to protrude outside the main body 1, while the other end 21 extends into the chamber 5 and faces the inclined side surface 23 of the weight 22.

Further, the member 18 has a valve portion 24, and this valve portion 24
is in contact with the main body 1 due to the expansion force of the coil spring 25.

Therefore, when the valve portion 24 is in contact with the main body 1 in this manner, the passage 11 and the chamber 19 are not communicated with each other.

26 is a hole provided in the main body 1 to communicate the chamber 19 with the outside.

27, when the weight 22 is moved upward and the projection 28 provided on the lower surface of the weight 22 is released from contact with the main body 1,
This is a passage provided in the main body 1 to introduce compressed air from the lower part of the chamber 3 into the lower part of the chamber 5.

29 is an annular groove provided on the side surface of the weight 22, and when the weight 22 moves upward, one end 21 of the member 18 is inserted into this groove 29, thereby causing the weight 22 to move upward. The weight 22 is held in the upper position as the cuff is blocked.

30 is a coil spring provided between the main body 1 and the weight 22, and the weight 22 is urged downward by the extension force of the spring 30.

Reference numeral 31 denotes an orifice provided to communicate the lower part of the chamber 5 with the outside, and the compressed air supplied to the lower part of the chamber 5 through this orifice 31 is discharged to the atmosphere.

A case where the operation of the valve device 32 configured in this way is applied to the vehicle braking system 40 shown in FIG. 2 will be described.

Now, when the valve 12 is in contact with the main body 1 with the force of the spring 15 -ah, the hole 17 is closed i, and similarly, the weight 22
When the protrusion 28 is in contact with the main body 1 due to the force biased by the spring 30, the passage 27 is closed, and the one end 21 of the member 18 is not brought into contact with the inclined side surface 23 of the weight 22, and the spring When the valve part 24 is in contact with the main body 1 under pressure applied by the valve 25, the passage 11 is closed.

In this state, when compressed air is also supplied to the artificial hole 2 via the control valve 41 and the compressed air source 42, this compressed air passes through the lower part of the chamber 3 divided by the piston 9, the passage 8, and the orifice 7. It is supplied to the upper part of the chamber 3 through the passages 11 and 27, and also to the tip of the valve part 24 and the lower surface of the projection 28, respectively.

Therefore, a force acting on one side of the piston 9 is applied to the compressed air supplied to the upper part of the chamber 3 through the orifice 7 provided in communication with the flow path.

By the way, gi is supplied to the tip of the valve part 24 through the passage 11.
Depending on the compressed air used, the pressure receiving area of the valve portion 24 facing the passage 11 and the extension force of the spring 25 are set so that the member 18 does not move to the right. Also, the passage 11 and the chamber 19 are not communicated with each other, and similarly, even with the compressed air supplied to the passage 27,
If the passage 27 and the lower part of the chamber 5 are communicated with each other, the weight 22 will not move upward.

When valve arrangement 32 is in this state, system 40:
It performs a predetermined operation under the control of a control valve 41 that instructs the braking of the vehicle.

That is, when the control valve 41 is turned on, the compressed air source 42
The compressed air flows into the piston cylinder 430 and both chambers 44.
and 45.

Here, since a piston rod 46 having a certain cross-sectional area is extended and provided in the chamber 45, the force acting on the piston rod 46Vc by the supplied compressed air is
The piston rod 46 is moved in the A direction because the side of the chamber 44 is closer to the side than the other side.

Accordingly, if this movement of the piston rod 46 in direction A causes a braking mechanism (not shown) of the system 40 to release the braking applied to the wheels of the vehicle;
The vehicle is now ready to run.

- When the force control valve 41 is in the off state, the chamber 44 is supplied with compressed air from the compressed air source 42, and the compressed air in the chamber 44 is exhausted to the atmosphere via the control valve 41. , the piston rod 46 is moved in the direction B by the action of compressed air in the chamber 45.

Therefore, if the braking mechanism of the system 40 is configured to apply braking to the wheels due to this movement of the piston rod 46 in the B direction, the vehicle will come to a stop.

By the way, when the control valve 41 is set to the OFF state and compressed air from the compressed air source 42 is being supplied to the artificial hole 2 of the valve device 32 and the chambers 44 and 45 of the piston cylinder 43, that is, when the vehicle When the vehicle is running, if an impact force caused by the derailment of the traveling vehicle applies a vertical acceleration exceeding the specified value to the valve device 32 mounted on the vehicle with the piston 9g48 facing upward, the weight 22 will move against the spring 30. The protrusion 28 moves upward against the stretching force of the main body 1, and the protrusion 28 is released from contact with the main body 1, and communication between the passage 27 and the lower part of the chamber 5 is created.

Due to this f'L, the compressed air supplied to the lower part of the chamber 3 is introduced to the lower part of the chamber 5 through the passage 2T.

By the way, the pressure receiving area of the weight 22 for the compressed air at the lower part of the chamber 5 is set so that the upward force due to the compressed air is stronger than the downward force due to the spring 30. When compressed air is introduced into the lower part of the weight 22, the weight 22 rapidly moves upward.

When the weight 22 moves upward in this way, one end 21 of the member 18 comes into contact with the inclined side surface 23 of the weight 22 1-1.
From 'LK, the member 18 is sequentially moved to the right against the stretching force of the spring 25.

Therefore, the contact of the valve part 24 with the plate body 1 is released, and the passage 1
1 and chamber 19 are communicated with each other.

When the passage 11 and the chamber 19 are communicated with each other in this way, the compressed air supplied to the upper part of the chamber 3 is transferred to the passage 11 and the chamber 1.
9 and the force discharged to the outside through the hole 26.

By the way, since the compressed air in the upper part of the chamber 3 is introduced through the orifice 7, the upper part of the pressure 3 is
・When connected to ■, the air pressure becomes equal to the outside air pressure.

As a result, the piston 9 is moved upward by compressed air pressure acting on the lower surface of the piston 9, and the valve 12 is also moved upward together with this.

When the valve 12 is moved upward, the contact between the valve seat 14 of the valve 12 and the main body 1 is released, the chamber 4 and the hole 11 are communicated with each other, and the compressed air supplied to the inlet hole 2 is It is discharged to the outside through a flow path that also includes the lower part of chamber 3, hole 16, chamber 4, hole 17, upper part of chamber 5, and outlet hole 6.

When the compressed air supplied to the artificial hole 2 is substantially discharged to the atmosphere, the piston rod 46 in the chamber 44
Therefore, the force acting on the piston rod 46 becomes smaller.
moves in direction B, and the system 400 braking mechanism applies brakes to the wheels to stop the vehicle.

Note that when the pressure receiving area of the weight 22 is set as described above, the introduction of compressed air into the lower part of the chamber 5 causes the weight 22 to be held in an upwardly displaced position, thereby preventing the flow from the valve 12. In addition to or instead of such means, the valve 12 may be used to maintain the flow path open.
This may be achieved by inserting one end 21 of the member 18 into the groove 29 so that the weight 22 is locked to the member 1Bvc in its upwardly displaced position.

That is, when the weight 22 moves upward by detecting acceleration,
The groove 29 rises to the position of one end 21 of the member 18, and this
The one end 21 and the groove 29 may be engaged with each other by the L.

This state of holding by the member 18 is released by moving one end 20 of the member 18 protruding outside the main body 1 further to the right against the stretching force of the spring 25.

Note that the compressed air introduced into the lower part of the chamber 5 passes through the orifice 3.
Since the compressed air in the lower part of the chamber 3 is gradually discharged to the atmosphere through the chamber 3, the compressed air is maintained at a predetermined air pressure.

By the way, the valve device 32 can also be applied to a vehicle braking system 50 as shown in FIG.

That is, in the system 50 shown in FIG. 3, when the control valve 41 is in the off state, that is, when the piston tip 46 is moved in the direction B, the braking is released, and on the other hand, when the control valve 41 is in the on state, that is, when the piston tip 46 is moved in the direction B, , when the piston rod 46 is moved in the A direction, the braking is reduced.

Therefore, for such a system 50, the valve device 3
By connecting the two artificial ports 2 to the compressed air source 42 and the outlet port 6 to the chamber 44, the valve device 32 achieves the same function as described above.

Furthermore, the valve device 32 can also be applied to a vehicle braking system 60 as shown in FIG.

That is, in FIG. 4, 61 is a three-acting valve, and this three-acting valve 61 has a port 63 communicating with the auxiliary air reservoir 62 and a port 64 communicating with one chamber 44 of the cylinder 43.
, a port 65 communicating with the compressed air source 42, and a port 66 open to the outside air.

Further, the three-acting valve 61 connects the ports 63 and 64 when the air pressure of the compressed air supplied to the port 65 decreases, and on the other hand, when the air pressure of the compressed air supplied to the port 65 is at a predetermined value. In some cases, it operates to close the port 63 and communicate the ports 64 and 66.

67 is a coil spring provided in one chamber 45 of the cylinder 43, and this spring 61G is
It acts to move the piston rod 46 in the B direction.

In the system 60 configured in this way, when the inlet hole 2 and the outlet hole 6 of the valve device 32 are not communicated with each other, the compressed air from the compressed air source 42 supplied to the port 65 is not depressurized and is kept at a predetermined level. The three-acting valve 61
operates to communicate ports 64 and 66 to substantially open the interior of chamber 44 to the atmosphere, while closing port 63 so that compressed air is stored in auxiliary air reservoir 62.

As a result, the piston rod 46 is moved in the direction B by the extension force of the spring 67, and the braking of the vehicle is released.

In response to this force, when the inlet hole 2 and outlet hole 6 of the valve device 320 are communicated with each other and the air pressure of the compressed air supplied to the port 65 decreases, the three-acting valve 61 (engine, port 63 and port 64
The compressed air in the auxiliary air reservoir 62 is introduced into the chamber 44.

The compressed air thus supplied into the chamber 44 causes the piston rod 46 to move in the direction A against the extension force of the spring 67, thereby applying braking to the vehicle.

As described above, according to the present invention, since a valve is provided to control the discharge of the compressed air supplied to the other side of the piston, reliable operation can be achieved, and furthermore, this control valve can be maintained. Since it can function as a means, it has high reliability and can also be applied to derailment detection.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a preferred embodiment of the present invention;
3, 3, and 4 are explanatory diagrams in which the specific example shown in FIG. 1 is applied to various vehicle braking systems. 1... Body, 2... Population hole, 6...
...Exit hole, 7... Orifice, 9...
...Piston, 12...Valve, 18...
Valve opening control member, 22... Weight.

Claims (1)

[Scope of utility model registration request] A flow path provided in the main body, a valve provided for opening and closing this flow path, a piston connected to the valve and to which compressed air of the flow path is supplied to one side, An orifice communicating with the flow path for supplying compressed air to the other side of the piston, and a control for controlling the discharge of the compressed air supplied to the other side of the piston to cause the flow path to be opened by a valve. a first valve, the first valve being arranged to actuate the control valve;
A valve device comprising a weight that operates to close the control valve in the first state and open the control valve in the second state.