JPH0430462Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a cone valve that opens and closes a water outlet of a water discharge pipe such as a dam, and discharges water along a cone-shaped valve body when the outlet is opened.

(Prior Art) Conventionally, this type of cone valve has been constructed by connecting a short tubular casing to the tip of the water outlet of a water discharge pipe via a flange joint, and having ribs fixed radially inside the casing protrude from the tip of the casing. A cone-shaped valve body is fixed to the tip of the rib, and a cylindrical sleeve that slides along the outer periphery of the casing is fitted onto the cone-shaped valve body,
A device is known in which an opening in a casing and a cone-shaped valve body is opened and closed, and water is discharged from the opening.

(Problem to be solved by the invention) By the way, this type of cone valve uses a cone to diffuse the water flow and reduce its energy before releasing the water, so it does not have to be affected by the water flow on both sides of the waterway. There is a problem in that a cone valve cannot be installed if there is something that should not be used or if the width of the waterway cannot be widened.

This idea was devised in view of the above-mentioned circumstances, and its purpose was to create a cone valve that can discharge water without affecting the area around the water outlet and that can be easily installed even in areas with narrow waterways. It is on offer.

(Means for solving the problem) In order to achieve the above purpose, the following technical measures were taken in this invention.

That is, this invention consists of a tubular casing that is fixedly supported at the tip of a water discharge pipe, a cone-shaped valve body that is provided in a protruding manner at the tip of the casing, and a valve body that is slidably fitted on the outside of the casing and that has a casing end and a cone that are slidably fitted on the outside of the casing. A cone valve consisting of a cylindrical sleeve that opens and closes a water discharge opening formed between a cone-shaped valve body, and a tapered pipe portion having an angle smaller than the expansion angle of the cone-shaped valve body at the tip of the sleeve. A hood having a cylindrical portion following the valve body is arranged in series, and a sliding guide tube fixed to the inside of the cylindrical portion via a rib is fitted onto a sliding guide rod protruding from the center of the tip of the valve body. There is.

(Function) According to this invention, when the sleeve of the cone valve is retreated to open the water discharge opening, water is diffused along the cone-shaped valve body, but the diffusion is regulated by the tapered pipe part of the hood, The water flows along the pipe, forms a cylindrical water stream, and is discharged forward. Therefore,
The energy of the flowing water is effectively reduced without diffusion, and the water flow does not affect the water channel walls, etc. around the water discharge opening.

(Example) Hereinafter, an example of this invention will be described based on the drawings. In the drawings, reference numeral 1 denotes a tubular casing, the base end of which is provided with a flange joint 2 that is connected to the flange of a water discharge pipe (not shown), and ribs 3 are arranged radially within the casing 1. There is. The rib 3 is provided to protrude outward from the opening edge 1A of the casing 1, and has a cone-shaped valve body 4 at its tip.
is integrally provided, and a water discharge opening 5 is formed between the opening edge 1A and the outer peripheral edge 4A of the valve body 4.

A sliding guide rod 6 is protruded from the center of the outside of the cone-shaped valve body 4, and a seal ring 7 is replaceably fixed to the front surface of the outer peripheral edge 4A of the valve body 4. There is.

Reference numeral 8 denotes a cylindrical sleeve, which is fitted on the outside of the casing 1 and is slidable on the outer surface of the casing in the axial direction.A water-stop packing 9 or the like is interposed at the base end. Grease is injected.

10 is a hood, which has a tapered pipe portion 10A;
The small-diameter end of the tapered tube portion 10A is integrally connected to the tip of the sleeve 8, and the cylindrical portion 1
Ribs 11 are provided radially within 0B, and a sliding guide tube 12 is fixed to the center of the ribs 11, and is fitted onto the sliding guide rod 6 of the valve body 4.

Center angle θ of the tapered tube portion 10A of the hood 10
is preferably set at a smaller angle (for example, about 50 degrees) than the central angle θC (about 90 degrees) of the cone-shaped valve body 4. The central angle θ of this tapered tube portion 10A is
When the central angle θC of the cone-shaped valve body 4 is 90 degrees,
At 50 degrees, the flow coefficient is the same as that of a cone valve without a hood. Further, the inner diameter of the cylindrical portion 10B of the hood 10 is the same as that of the casing 1.
By making the inner diameter approximately 1.7 times, the hood 10
It is possible to prevent the generation of negative pressure inside. moreover,
The length of the cylindrical portion 10B of the hood 10 is approximately 0.3 to 0.5 times the inner diameter of the casing 1 (varies depending on the stroke of the sleeve 8) to prevent water discharged from the hood 10 from scattering. I can do it.

13 is a sleeve sliding drive rod;
It is fixed to a bracket 14 protruding from the
It is caused to reciprocate by a driving means such as a hydraulic or electric screw jack.

According to the above embodiment of the invention, when the sleeve 8 of the cone valve is moved backward to open the water discharge opening 5 as shown in FIG. However, its diffusion is regulated by the tapered pipe portion 10A of the hood 10, and the water is discharged from the open end of the cylindrical portion 10B of the hood 10 as a cylindrical water stream directed in the axial direction of the casing 1. Therefore, the flowing water discharged from the hood 10 is weakened and flows forward without being diffused, and there is no influence on the wall surface around the cone valve.

Further, the hood 10 is supported and guided by the sliding guide rod 6 provided on the cone-shaped valve body 4 via the rib 11 and the sliding guide tube 12, so the hood 10 can be smoothly slid and vibrated. It does not cause any noise or noise.

It goes without saying that the hood 10 is separate from the sleeve 8 and can be detachably attached using bolts, nuts, etc. The sleeve sliding drive rod 13 is attached to the outer periphery of the tip of the sleeve 8 or to the hood 10. The tapered pipe portion 10A may be used.

(Effect of the invention) As described above, the cone valve according to this invention is one in which the hood 10 having the tapered pipe part 10A and the cylindrical part 10B is connected to the tip of the sleeve 8, so that water is discharged from the water discharge opening 5. It is possible to reduce the force of the flowing water by preventing it from spreading, and the flowing water can be discharged in a cylindrical shape parallel to the axis of the water pipe.
It eliminates the impact on surrounding walls, etc., making it easy to install the cone valve, and it can also be installed in places with narrow waterways.Furthermore, the simple structure makes maintenance easy and economical. Obtainable. Furthermore, since the angle θ of the tapered pipe portion 10A is made smaller than the spread angle θC of the valve body 4, the same flow coefficient as that of a cone valve without a hood can be obtained, and vibration and noise can be prevented. be able to. Furthermore, the present invention provides hood 1
0 is supported and guided by the sliding guide rod 6 provided on the cone-shaped valve body 4 via the rib 11 and the sliding guide tube 12, so that the hood 10 can slide smoothly. , vibration and noise generation can be prevented.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a central longitudinal side view in the closed state, and FIG. 2 is a central longitudinal side view in the open state. 1... Casing, 4... Cone-shaped valve body, 5...
...Water opening, 8...Sleeve, 10...Hood,
10A...Tapered tube part, 10B...Cylindrical part, 6
...Sliding guide rod, 11...Rib, 12...Sliding guide tube, θC...Spreading angle, θ...Angle.

Claims (1)

[Scope of utility model registration request] The cone valve is composed of a tubular casing 1 fixedly supported at the tip of a water discharge pipe, a cone-shaped valve body 4 provided in a protruding manner at the tip of the casing 1, and a cylindrical sleeve 8 slidably fitted on the outside of the casing 1 and opening and closing a water discharge opening 5 formed between the end of the casing 1 and the cone-shaped valve body 4.
The hood 10 is provided with a tapered tube portion 10A having an angle θ smaller than the expansion angle θC of the tapered tube portion 10A and a cylindrical portion 10B connected thereto, and a rib 1 is provided in the cylindrical portion 10B.
1 is a perspective view of a cone valve according to the first embodiment of the present invention;