JPH0716145Y2 - Ball valve - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is a ball valve that is used by being inserted near the tip of a hose mainly used for extinguishing forest fires. The present invention relates to a ball valve that can be used.

(Prior Art) In this type of conventional ball valve,
The ball-shaped valve body is constituted by forming a water passage that connects or disconnects the water supply port and the drainage port by rotating the ball-shaped valve body within an angle range of 90 degrees.

(Problems to be solved by the invention) In the conventional ball valve having the above-mentioned structure, when the ball valve is used by being inserted in the middle of a high-speed high-pressure hose such as a fire-extinguishing hose, the water-supply state is suddenly closed. When the valve was opened, it was liable to cause damage such as hose rupture due to the water hammer phenomenon, which had the drawback of impairing the original function of water supply such as fire fighting activities.

Further, the conventional ball valve is capable of supplying water in only one direction, and for example, in order to discharge water for afterglow treatment, which is important in extinguishing activity, the main fire extinguishing hose with the ball valve inserted is There was the inconvenience of having to separately prepare a long hose for the afterglow treatment.

The present invention has been made in view of the above circumstances, and is characterized by providing a ball valve capable of preventing damage to a connection hose due to a water hammer phenomenon and easily dividing water such as afterglow treatment. .

(Means for Solving the Problems) A ball valve according to the present invention made in order to achieve the above object is a valve main body having a water supply port and a drain port coaxially provided on both sides, A ball-shaped valve body fitted and held in the valve body so as to be rotatable around an axis perpendicular to the axes of the water supply port and the drainage port, and the ball-shaped valve body around the axis. In a ball valve provided with a lever that is rotated in a rotation angle range of 90 degrees, the peripheral wall of the valve body has an axis perpendicular to the axes of the water supply port and the drainage port, and While providing a branch drain port having a diameter smaller than that of the water inlet port and the water outlet port, the ball-shaped valve body communicates between the water inlet port and the water outlet port, and the opening on the water inlet port side is provided to the water outlet port. A water passage formed in a large-diameter opening that communicates from the Further, the peripheral wall portion of the ball-shaped valve body facing the branch drainage port portion is formed into a large valve portion that closes the drainage port portion when the ball-shaped valve body rotates 90 degrees and the branch drainage port portion is formed. It is characterized in that a small valve portion for closing the branch drainage port portion is formed on the peripheral wall portion of the ball-shaped valve element on the side until the ball-shaped valve element rotates 90 degrees.

(Function) When the water passage of the ball-shaped valve element is oriented in the axial direction of the water supply port and the branch drainage port of the valve body, the ball-shaped valve body facing the water supply port side of the valve body passes through. Since the large-diameter opening that connects the opening of the water channel from the water supply port to the branch drainage port is formed, the water supply from the water supply port side is distributed to the branch drainage port and the drainage port. Then, the main water flow through the drainage port and the branch water flow through the branch drainage port are simultaneously performed. Therefore, during the forest fire extinguishing activity, the main water flow extinguishes the water while leaving the branch water flow. Fire extinguishing processing can be performed in parallel.

Further, when the operation lever is slightly rotated, the small valve portion of the ball-shaped valve body reaches the branch drainage port portion and the branch drainage port portion is closed, but the water passage is formed into the water supply port portion and the drainage port portion. Fire extinguishing water is discharged only through the drainage port while maintaining communication between them.

Next, when the operation lever is rotated up to 90 degrees, the large valve portion of the ball-shaped valve body reaches the drainage port portion and closes the drainage port portion, but the water passage has a water supply port portion and a branch drainage port portion. The state of communication with and can be used to extinguish the afterglow by discharging water through the branch drainage port.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an external side view of the ball valve according to the present invention, and FIG. 2 is a semi-longitudinal front view. In each of these drawings, (1)
Is a valve body. This valve body (1) is formed by fitting and fixing a body (1A) whose inner surface is processed into a spherical shape and a body lid (1B), and ball seats (1C) on opposite sides of the inner surface. (1C) is attached, and the push ring (2) for hose one-touch connection is attached to the main body lid (1B) on one ball seat (1C) side.
The drainage port (2) is formed by screwing the insert metal fitting (2B) holding the external fitting (A) onto the protruding cylindrical part (1a) of the other ball seat (1C) external fitting main body (1A). Is a fastening ring (3C) that holds the hook for one-touch connection (3A) and claw seat (3B) inside, and is fixed with a screw (3D) so that the water supply port (3) is the drainage port (3). It is formed coaxially with 2).

(4) is a ball-shaped valve body having a shape in which both sides of the ball in the diameter direction are cut, and the ball-shaped valve body (4) is brought into close contact with the ball seats (1C) (1C), respectively. In 1), the water supply port (3) and the drain port (2)
It is rotatably fitted and held around an axis (a) orthogonal to the axis, and a water passage (4A) having a shape described later is formed inside.

(5) is a rotation operation lever, and this rotation operation lever (5)
The base end portion of is fixedly connected to the rotational operation force transmitting stem (6) which is rotatably interlocked with the ball-shaped valve body (4) and penetrates the main body (1A) of the valve main body (1) and is projected to the outside. And the notch (7
The ball-shaped valve element is provided via a stopper plate (7) having a) and a stopper (8) protruding from the main body (1A) in a state of being located in the notch (7a) of the stopper plate (7). It is configured to be freely rotatable within a 90-degree rotation angle range around the rotation axis (a) of (4).

(9) is a branch drain port, and the branch drain port (9) has an axis perpendicular to the axes of the drain port (2) and the water inlet (3), and the drain port. It is formed by screwing an insert fitting (9B) having a diameter sufficiently smaller than that of the insert fitting (2B) constituting the part (2) onto the peripheral wall portion of the main body (1A).
A push ring (9A) for hose one-touch connection is externally fitted and held on the fitting (9B).

The water passage (4A) of the ball-shaped valve body (4) is rotated by the lever (5) in the 90-degree range of the ball-shaped valve body (4) as shown in FIG. 3 (A). First, only the large-diameter drainage port (2) communicates with the water supply port (3)
As shown in FIG. 3 (B), the second state in which only the small-diameter drainage port (9) communicates with each other, and as shown in FIG. 3 (C), both the large and small drainage ports ( 2) The shape that can be switched to the third state in which (9) communicates with each other is formed.

That is, the ball-shaped valve body (4) has a large-sized valve portion (4a) capable of opening and closing the large-diameter drainage port portion (2) on both sides of a water passage (4A) penetrating the central portion, and a small-sized drainage port. As shown in FIG. 3 (C), the opening diameter of the water passage (4A) on the side of the water inlet (3) is formed by forming a small valve portion (4b) capable of opening and closing the portion (9), respectively. A large-diameter opening is formed which can communicate with the water supply port (3) and the small-diameter branch drainage port (9).

The positioning means for the ball-shaped valve element (4) and the operating lever (5) in the above-mentioned first to third states is a plunger using a spring ball mounted near the rotational axis of the rotational operating lever (5) ( 10) and a V-shaped recess (11) formed on the valve body (1) side are employed as click engaging means. Further, (12) in the figure is a protective tire fitted to the outside of the tightening ring (3C).

The ball valve (V) configured as described above has its water supply port (3) connected near the tip of the fire-fighting hole (H1) connected to a pump (not shown) as shown in FIG. In addition, the water discharge nozzle (N) is connected to the drainage port (2) through the extension hose (H2) or the water discharge nozzle (N) is directly connected, and is used for extinguishing a forest fire, for example. However, in such a use, when connecting or disconnecting the extension hose (H2) while keeping the water discharged, the ball-shaped valve body (4) is rotated to operate as shown in FIG. 3 (A). By switching operation from the 1st state to the 2nd state shown in FIG. 3 (B), the water pressure applied to the hose (H1) is released to the side of the branch drainage port (9), and the hose (H1) caused by the water hammer phenomenon You can prevent a burst.

In addition, a small diameter hose (H3) is also attached to the branch drainage port (9).
And the ball-shaped valve body (4) is rotated to switch to the third state shown in FIG. 3 (C), whereby the large diameter drainage port (2), extension hose (H2), nozzle (N) ), The main water flow is discharged through the small diameter drainage port (9), and the branch water flow is discharged through the small diameter hose (H3).

(Effect of the Invention) As described above, according to the ball valve of the present invention, when the large-diameter opening of the water passage of the ball-shaped valve body is in communication with the water supply port of the valve body and the branch drainage port, It is possible to distribute the water supply from the water supply port side to the branch drainage port and the drainage port, and simultaneously perform the water discharge by the main water flow through the drainage port and the water discharge by the branch water flow through the branch drainage port. Therefore, it is possible to perform the extinguishing treatment of the afterglow by the branch water stream in parallel while performing the fire extinguishing water discharge by the main water stream during the forest fire extinguishing activity, which enables efficient extinguishing work.

Also, while the operation lever is being rotated up to 90 degrees, the small drain valve part of the ball-shaped valve element closes the branch drain port and keeps the water passage in communication with the water supply port and the drain port. Therefore, the fire extinguishing water can be discharged only through the drain port.

Further, when the operating lever is rotated up to 90 degrees, the large valve part of the ball-shaped valve body closes the drainage port and connects the water passage to the water supply port and the branch drainage port. Therefore, it is possible to prevent damage to the connection hose and the like due to the water hammer phenomenon caused by the complete stoppage of water discharge, and it is possible to continue extinguishing the afterfire due to water discharge through the branch drain port.

[Brief description of drawings]

FIG. 1 is an external side view of the ball valve according to the present invention, FIG. 2 is a semi-longitudinal front view, and FIGS. 3 (A), (B), and (C) are enlarged vertical side views for explaining the operating state. FIG. 4 is a side view illustrating a usage state. (1) ... Valve body, (2) ... Drainage port part, (3) ... Water supply port part, (4) ... Ball-shaped valve body, (4A) ... Water passage, (5) ...
Rotation operation lever, (9) ... Branch drainage port.

Continuation of the front page (56) Reference JP-A-63-19476 (JP, A) Actually opened 63-128368 (JP, U) Actually opened 61-17573 (JP, U) Actually opened 57-197557 (JP , U) Actual development 55-181069 (JP, U) Actual public 8-9638 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A valve body having a water supply port and a drainage port coaxially provided on both sides thereof, and an axial center orthogonal to the axial center of the water supply port and the drainage port in the valve body. A ball valve provided with a ball-shaped valve body rotatably fitted and held around the valve body, and a lever for rotating the ball-shaped valve body in a rotation angle range of 90 degrees around the axis, On the peripheral wall of the water supply port and the drain port, a branch drain port having a smaller axis than the water inlet and the drain port is provided, while the ball shape is provided. The valve body is formed with a large-diameter opening that communicates between the water supply port and the drainage port and connects the opening on the water supply port side from the water supply port to the branch drainage port. A water channel is provided, and the ball-shaped valve body is rotated 90 degrees around the peripheral wall of the ball-shaped valve body facing the branch drainage port. It is formed in a large valve part that closes the drainage port part when it is rolled, and the branch drainage port is formed on the peripheral wall part of the ball valve part on the branch drainage part side until the ball valve part rotates 90 degrees. A ball valve characterized in that a small valve portion for closing the portion is formed.