JP2770150B2 - Valve body mounting device for water discharge flow control valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to discharge surplus water for regulating water levels in reservoirs such as dams, to take warm water from the upper water level as agricultural water, and to maintain discharge to downstream rivers. The present invention relates to a valve body mounting device for a water discharge flow control valve provided at an end of a water pipe.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 5 and 6, a flow control valve element 1 facing a water pipe is vertically opened and closed by rotating a spindle 3 by a switch 8 so that opening and closing can be freely adjusted. In the water flow control valve, a valve body 1 having a female screw body 2 screwed to a spindle 3 suspended from a shaft sealing device 12 is accommodated above a valve body casing 10 connected to a water guide pipe when rising. A hood 11 is provided in communication with the valve body casing 10 and the valve body 1, and a metal waterproof sheet ring 9 is fixedly provided on the front side and the back side in the water pressure direction P, respectively.
As shown in FIG. 6, lower portions on the front side and the rear side, which are the contact surfaces of the water stop seat rings 9, are tapered as shown in FIG.
Alternatively, the front side is formed in a tapered shape, and the back side is formed in a flat shape, and a so-called wedge-type pressing force is used to enhance the water stopping effect.

[0003]

However, in such a structure, in winter, the valve is fully closed,
Water remains in the valve body casing 10 and the bonnet 11 in a state of being filled with water, and there is no escape, and the outer peripheral surface area of the valve body casing 10 and the bonnet 11 is large by exposing the periphery of the valve to cold wind. Since the volume of remaining water is relatively small, the freezing of the remaining water will progress with the passage of time. The valve body casing 10 and the bonnet 11 bulge in the outer circumferential direction to exert a deformation which does not return beyond the strength limit of the steel structure, so that the metal watertight seat ring 9 on the valve body 1 side. When the water stop surface taper angle of the metal water stop sheet ring 9 on the valve body casing 10 side is widened with respect to the water stop surface taper angle, the contact property is deteriorated and water leakage is caused. In addition, this water leakage also freezes the downstream side of the valve and results in complete loss of the function of the valve, and even if the entire valve is equipped with a heat insulating material and an electric heater to prevent freezing. However, disadvantages are extremely high in terms of cost and management.

[0004]

SUMMARY OF THE INVENTION A first object of the present invention is to:
In order to solve such a problem, the valve body has a simple structure so that it does not freeze, and the valve body can be effectively attached. Therefore, the valve body for flow control facing the water pipe is equipped with a spindle by a switchgear. A water discharge flow control valve that can be opened and closed while being moved up and down by rotation of the water discharge pipe, wherein a water discharge body that is a downstream end of a water discharge cylinder that communicates with the water guide pipe has an open back side and a vertical Both guide rails for moving guide are provided on both sides, and the upper part of both guide rails, the switch and the spindle are respectively mounted on a support frame extending above the back side of the water discharge body so as to be exposed outside the machine. It is composed.

A second object of the present invention is to make it possible to effectively stop water at the front side of the valve body when the valve is fully closed. For this reason, a ring-shaped groove is formed in the rear cross section of the water discharge body. In addition, a water-stop rubber ring is attached to the inside of the groove around the outer surface of the front surface of the valve body so that the lip portion can be pressed.

A third object of the present invention is to make it possible to more effectively stop water by using water pressure on the front side of a valve body.
Therefore, water can be passed from the inside of the water discharge cylinder to the inside of the back side of the groove.

[0007]

Therefore, when the valve body is fully opened, the rear side and the upper side of the valve body are exposed to the outside and are exposed to the outside, so that no accumulated water is generated around the periphery.
Even if it is exposed to cold wind for a long time in winter, it does not freeze and does not leak as usual, so that the water stopping performance can be further improved, and maintenance and inspection and repair of each part are easy It can be made simple and can be manufactured at low cost.

[0008] A ring-shaped groove is formed in the rear end surface of the water discharge body, and a water-stopping rubber ring is mounted in the groove so that a lip portion can be pressed against the front outer periphery of the valve body. When the valve is fully closed, the lip of the waterproof rubber ring presses against the outer peripheral side of the front face of the valve body due to the elasticity and flexibility of the rubber, so that water can be effectively stopped so as not to leak water.
In addition, the lip portion of the water-stop rubber ring can retreat into the groove, so that abnormal frictional resistance generated when the valve is opened and closed can be avoided.

Further, if water can be passed from the inside of the water discharge cylinder to the inner side of the groove on the back side, when the valve is fully closed, the water pressure due to the water flow acts on the back surface of the lip portion of the waterproof rubber ring. As a result, the water stop performance can be improved while further improving the degree of adhesion of the lip portion to the front surface of the valve body.

[0010]

1 to 4 show an embodiment of the present invention, wherein a water discharge cylinder 4 having a flange 16 connectable to an end of a water pipe.
A support frame 4b extends above the water discharge body 4a, which is the downstream end of the water discharge body 4a. On the open back side of the water discharge body 4a, both guide rails 7 for vertically moving the valve 1 are provided. , 7 are provided on both sides, and the upper portions of the guide rails 7, 7, which are vertically erected, are fixed to both sides of the support frame 4b having an open back side, and the upper end of the support frame 4a. A switchgear 8 having an operation handle 14 is mounted on a gantry 15 erected on the back side of the unit, and the spindle 3 vertically suspended from the switchgear 8 so that the switchgear can be rotated forward and reverse by the forward and reverse operation of the operation handle 14. Is screwed into a female screw body 2 fixed to an upper portion on the rear side of the valve body 1.

A ring-shaped groove C having a certain depth and width is formed on the rear end surface of the water discharge body 4a which is an outer peripheral portion of the water discharge port diameter φd. The water-stop rubber ring 5 is fitted so that the arc-shaped lip portion 5a is pressed against the front surface serving as the portion having the water center diameter φD, and the pressing plate 6 is applied to the outer peripheral rear side of the water-stop rubber ring 5. The lower portions of the guide rails 7, 7 are applied to the back side and fixed by screws 13. As shown in FIG. 4, when the valve element 1 is fully closed, the water pressure from the inside of the water discharge cylinder 4 is increased. Extends through the gaps a and b into the groove C and extends over the back side of the lip 5a.

Therefore, when the valve body 1 is fully closed,
As shown in FIGS. 1 and 2, since the valve element 1 is exposed to the outside on the rear side and the upper side thereof, no accumulated water is generated around the valve element 1 and the valve element 1 can be used for a long time in winter. Even if it is exposed to cold wind, it does not freeze and does not leak as in the past, so the water stopping performance can be further improved, and maintenance and inspection and repair of each part can be performed easily. And a simple structure that can be manufactured at low cost.

When the valve body 1 is fully closed, the lip portion 5a of the water stopping rubber ring 5 is pressed against the outer periphery of the front surface of the valve body 1 due to the elasticity and flexibility of the rubber, thereby effectively stopping water from leaking. And the lip 5 of the waterproof rubber ring 5
a can be retracted into the groove C, so that abnormal frictional resistance generated between the valve body 1 and the valve body 1 when the valve is opened and closed can be avoided. When the valve is half-opened, the lip portion 5a projects toward the valve body 1 side. Becomes

When the valve is fully closed, as shown in FIG. 4, the water pressure from inside the water discharge cylinder 4 acts on the back surface of the lip 5a of the waterproof rubber ring 5 while extending into the groove C through the gaps a and b. Since the pressing force acts toward the atmosphere side, the degree of close contact with the valve body 1 is further improved, and the water can be reliably stopped.

[0015]

As described above, according to the present invention, when the valve body (1) is fully closed, the back side and the upper side of the valve body (1) are exposed to the outside and are exposed. In addition, there is no accumulated water around it, and even if it is exposed to the cold wind for a long time in winter, it does not freeze and does not leak as in the past, and the water stopping performance can be further improved. In addition, since maintenance and inspection and repair of each part can be easily performed, a simple structure that can be manufactured at a low cost can be obtained, and this has a feature that can be suitably implemented.

On the rear end face of the water discharge body (4a),
A ring-shaped groove (C) is formed, and a water-stop rubber ring (5) to which a lip (5a) can be pressed against the outside of the front surface of the valve body (1) is mounted in the groove (C). Then, when the valve is fully closed, the lip portion (5a) of the water stopping rubber ring (5) presses against the outer peripheral side of the front surface of the valve body (1) due to the elasticity and flexibility of the rubber, thereby effectively stopping water from leaking. In addition, the lip portion (5a) of the water-stop rubber ring (5) can retreat into the groove (C), so that an abnormal frictional resistance generated at the time of opening and closing the valve can be avoided. A longer life of the water rubber ring (5) can be achieved.

Further, a water discharge cylinder is provided inward of the groove (C).
(4) When water is allowed to flow from inside, when the valve is fully closed, the water pressure due to the water flow acts on the back surface of the lip portion (5a) of the waterproof rubber ring (5), and the lip portion (5a ) Of the valve body (1)
Water stopping performance can be improved while further improving the degree of adhesion to the front surface.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a main part of an embodiment of the present invention.

FIG. 2 is a rear view showing a main part with a part broken away.

FIG. 3 is a plan sectional view showing a part of FIG. 2;

FIG. 4 is an enlarged plan sectional view showing the inside of the X-ray in FIG. 3;

FIG. 5 is a front sectional view showing a conventional example.

FIG. 6 is a side sectional view showing a part of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve body 3 Spindle 4 Water discharge cylinder 4a Water discharge body 5 Waterproof rubber ring 5a Lip part 4b Support frame 7 Guide rail 8 Switch C groove

Claims (1)

(57) [Claims] 1. A water discharge flow control valve wherein a flow control valve element (1) facing a water guide pipe is vertically opened and closed by a rotation of a spindle (3) by a switch (8) so as to be adjustable in opening and closing. On the open back side of the water discharge body (4a), which is the downstream end of the water discharge cylinder (4) communicating with the water guide pipe,
Both guide rails (7) for vertically moving the valve element (1)
(7) is provided on both sides, and a support frame (4b) extending upward from the back side of the water discharge body (4a) includes an upper portion of the guide rails (7) and (7), a switch (8) and Each of the spindles (3) is mounted in an exposed state outside the machine, and a ring-shaped groove (C) is formed in the rear end face of the water discharge body (4a), and a valve is provided in the groove (C). A water-stop rubber ring (5) is provided around the entire surface of the body (1) so that the lip portion (5a) can be pressed against the body, and furthermore, water is allowed to flow inward of the groove (C). Valve mounting device for water discharge flow control valve.