JP2003336762A - Water feed valve opening/closing operation structure of delivery port device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a delivery port device which speeds up an opening/closing operation by an opening/closing operation handle of a water feed valve, and minimizes the whole device by reducing an opening/closing operation range. <P>SOLUTION: The water feed valve is rotatably journaled inside a valve body 1 and the opening/closing operation handle 17 is rotatably journaled to the side of the valve body 1 where the valve rotation shaft 6 rotating the water feed valve is extended. A link pin 20 is fixed to a link lever 19 fixed to the outside end part of the valve rotation shaft 6, and a long hole 21 engaging with the link pin 20 in a sliding state is formed on the opening/closing operation handle 17. The distance between the rotation axis center of the opening/closing operation handle 17 and the link pin 20 is set larger than the distance between the axis center of the valve rotation shaft 6 and the link pin 20, and the rotation angle of the opening/closing operation handle 17 is enlarged to transmit to the valve rotation shaft 6. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for opening and closing a water supply valve in a discharge port device such as a portable fire pump.

[0002]

2. Description of the Related Art Conventionally, in a portable fire fighting pump device, water absorbed from a water absorption pipe and pressurized by a pump is
A discharge port device for discharging to a water supply hose having a water discharge nozzle mounted on the tip side is provided. This discharge port device has a ball-shaped water supply valve that switches water between a connected water supply hose between a discharge state and a cutoff state, and such a discharge port device is disclosed in Japanese Utility Model Publication No. 5-43326. Japanese Patent Laid-Open No. 4-331878, Japanese Patent Laid-Open No. 11-30401
No. 7 and Japanese Patent Laid-Open No. 11-311340.

The opening and closing operation of the water supply valve in the conventional discharge port device is performed by extending the rotation support shaft of the ball-shaped water supply valve installed in the discharge device to the outer surface of the discharge device and opening and closing the rotation support shaft. It is performed by directly connecting the lower end of the operating handle and rotating it back and forth.

[0004]

In the opening / closing operation device for the water supply valve in such a discharge port device, the rotation angle of the ball-shaped water supply valve and the operation angle between the opening / closing operation handle that require at least 90 degrees. Since the operating angle of the opening / closing operation handle is relatively large because the same is used for a discharge port device that requires frequent and rapid discharge of water, such as a portable fire pump. Cannot provide sufficient operability for the opening / closing operation required by the operator.

The discharge port device provided in the portable fire fighting pump is rotatably attached to the pump body so that the discharge direction can be changed. In order to prevent the opening / closing operation handle of the valve from interfering with the pump body, the discharge port device must be arranged apart from the pump body, which is also a factor that hinders the compactness of the portable fire pump.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a hollow ball-shaped water supply valve 4 is rotatably supported by a pipe formed in a valve body, and the water valve is rotated. A shaft extends to the outer side surface of the valve body, and an opening / closing operation handle is rotatably supported on a side surface of the valve body on the valve rotation axis extension side of the valve body. The operation angle of the opening / closing operation handle is reduced by interlocking the opening / closing operation handle and the valve rotation shaft via the rotation angle expanding mechanism so that the rotation angle of the rotation shaft becomes large.

[0007]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described with reference to FIGS. A valve body 1 which is a pipe line having open upper and lower ends is rotatably or arbitrarily fixed to a valve seat (not shown) of a pump body with a vertical axis, and an inlet hole is provided in the valve body 1. 2 and exit hole 3
A hollow ball-shaped water supply valve 4 in which are formed is stored. The water supply valve 4 is rotatably supported by a support shaft 5 having a shaft center orthogonal to the flow axis of water flowing in the valve body 1 and a valve rotation shaft 6. The support shaft 5 and the valve rotation shaft 6 are arranged on the same axis, and the valve rotation shaft 6 and the water supply valve 4 are connected so as to rotate integrally. .

A ring-shaped main follower 7 is fitted to the upper end of the valve body 1, and a main seal 8 made of an elastic member slides on the outer peripheral surface of the water supply valve 4 by the main follower 7. Is held.

A hollow neck flange 9 which is a pipe line is fixed to the upper end of the valve body 1 so as to sandwich the main follower 7 and the main seal 8. The upper portion of the neck flange 9 has a discharge port. The body 10 is fitted and fixed. The discharge port body 10 is formed with a discharge port 11 that opens in a direction substantially perpendicular to a flow axis of water flowing in the valve body 1 and the neck flange 9, and further in a vertical direction along the flow axis. A guide hole 12 having an axis is formed.

A valve shaft 13 is slidably inserted into the guide hole 12, and a disc-shaped check valve 14 for opening and closing the upper end of the neck flange 9 is fixed to the lower end of the valve shaft 13. ing. The neck flange 9
A valve packing 15 made of an elastic member is fixed to the lower surface of the backflow prevention valve 14 that abuts on the upper edge.

On the side surface of the valve body 1, an opening / closing operation handle 17 having a grip 16 on the upper portion is rotatably attached by a handle shaft 18. The outer end of the valve rotation shaft 6 extends to the same side surface of the valve body 1 as the side where the opening / closing operation handle 17 is attached, and the link lever 19 is fixed. This link lever 19
The link pin 20 fixed to the tip end side of the is slidably locked in a long hole 21 formed in the intermediate portion of the opening / closing operation handle 17.

The axis of the valve rotating shaft 6 and the link pin 2
The distance L2 between the link pin 20 and the shaft center of the handle shaft 18, which is the center of rotation of the opening / closing operation handle 17, is set to be large with respect to the distance L1 from 0, and in the present embodiment, L1: L2. The ratio is set to approximately 1: 2 and the valve drive shaft 6
The rotation angle of the opening / closing operation handle 17 is approximately 45 degrees with respect to the rotation angle of 90 degrees. The link lever 19, the link pin 20, and the opening / closing operation handle 17 configured and arranged in this manner
And the elongated hole 21 constitute a rotation angle enlarging mechanism. The link pin 20 may be provided in the opening / closing operation handle 17 and the elongated hole 21 may be formed in the link lever 19.

Further, a notch pin 23 biased toward the valve body 1 by a spring 22 is provided at the lower end of the opening / closing operation handle 17, and the notch pin 23 is provided.
Is selectively engaged with the two-hole notches 24 formed in the valve body 1, and the opening / closing operation handle 17 positions the discharge state or the blocking state. Further, a stopper pin 25 that abuts on the link lever 19 and restricts the rotation range of the valve rotation shaft 6 is fixedly provided on the side surface of the valve body 1.

1, 3 and 4 show the state in which the water supply valve 4 is operated to the "open" position, the inlet hole 2 is located below and the outlet hole 3 is located above. Is located in. The water sucked up by the driving of the pump enters the inside of the water supply valve 4 through the inlet hole 2 and enters the outlet hole 3
To flow into the inside of the neck flange 9, further push up the backflow prevention valve 14 by its own water pressure, and flow into the inside of the discharge port body 10. Then, the water flowing into the discharge port body 10 changes its flow direction to a substantially right angle, and the discharge port 11
Is discharged from.

Next, when stopping the discharge of water,
When the opening / closing operation handle 17 is rotated about the axis of the handle shaft 18 as shown in FIGS. 2 and 5, the opening / closing operation handle 17 moves from the link lever 19 to the valve rotating shaft 6 via the link pin 20. Water transmission valve 4 is transmitted 9
Rotate 0 degrees. Then, the spherical outer peripheral surface of the water supply valve 4 and the main seal 8 close the lower end opening of the neck flange 9 and prevent water from flowing into the neck flange 9, so that water is discharged from the discharge port 11. Be stopped.

Here, the turning operation angle of the opening / closing operation handle 17 during the opening / closing operation of the water supply valve 4 is the distance L1 between the axis of the valve turning shaft 6 and the link pin 20, and the turning operation of the opening / closing operation handle 17. Since the distance L2 between the axis of the handle shaft 18, which is the center, and the link pin 20 is set to approximately 1: 2, the rotation angle of the water supply valve 4, that is, the valve drive shaft 6
The rotation angle is about half the rotation angle, and the operation angle of the opening / closing operation handle 17 is enlarged and transmitted to the valve rotation shaft 6.

When the pump operation is stopped with the water supply valve 4 in the "open" state, the water pressure acting on the lower surface of the backflow prevention valve 14 disappears, so the backflow prevention valve 1
4 is lowered by its own weight to close the upper end of the neck flange 9. Therefore, the inflow of air into the neck flange 9 is blocked, the water in the pump is prevented from falling to the water source, and when the operation of the pump is restarted, the discharge of water is immediately restarted without priming. .

[0018]

According to the present invention, the opening / closing operation handle and the valve rotation shaft are enlarged in rotation angle so that the rotation angle of the valve rotation shaft of the water supply valve is larger than the rotation angle of the opening / closing operation handle. By interlocking via the mechanism, even if the opening and closing operation is performed with the hollow ball-shaped water feeding valve similar to the conventional one, the turning angle of the opening and closing operation handle can be reduced, so The shutoff operation can be performed quickly. Also, since the operating area of the opening / closing operation handle is small, it is possible to avoid the interference of the handle with the surroundings, and the discharge port device part to which the discharge port device with the water supply valve is attached is attached to the discharge port device part. Can be installed as close to each other as possible, so that it is possible to reduce the size and weight of the entire device including the discharge port device.

[Brief description of drawings]

FIG. 1 is a front view of a discharge port device showing an embodiment of the present invention.

FIG. 2 is a front view of a discharge port device in which an opening / closing operation handle is rotated to a closed position.

FIG. 3 is a vertical cross-sectional view of a discharge port device.

FIG. 4 is a partial cross-sectional view of the discharge port device in which the water supply valve is in the open position.

FIG. 5 is a partial cross-sectional view of the discharge port device in which the water supply valve is in the closed position.

[Explanation of symbols]

1 valve body 4 water supply valve 6 Valve rotation axis 17 Opening / closing operation handle 19 Link lever 20 link pins 21 long hole

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Claims (2)

[Claims] 1. A hollow ball-shaped water feed valve is rotatably supported by a pipe formed in a valve body, and
A valve rotation shaft for rotating the water supply valve is extended to an outer side surface of the valve body, and an opening / closing operation handle is rotatably supported on a side surface of the valve body on the valve rotation axis extension side. A discharge port characterized in that the opening / closing operation handle and the valve rotation shaft are interlocked via a rotation angle expansion mechanism so that the rotation angle of the valve rotation shaft is larger than the rotation angle of the operation handle. The structure for opening and closing the water supply valve of the device. 2. The rotation angle enlarging mechanism fixes a link pin to one of a link lever fixed to the valve rotation shaft or the opening / closing operation handle, and engages with the other in a sliding state with the link pin. A discharge port characterized in that a long hole is formed so that the distance between the pivot axis of the opening / closing operation handle and the link pin is set larger than the distance between the axis of the valve pivot and the link pin. The structure for opening and closing the water supply valve of the device.