JP2001020329A - Multifunction water stop cock for water supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multifunction water stop cock for water supply capable of providing alert, agile, and secure operation at the time of return prevention and simplifying the exchange work of valve element packings when the valve element packing is worn. SOLUTION: A main body barrel 1 has a water stop cock chamber 2 and a check valve chamber 3. A ball cock body 4 is turnably provided in the water stop cock chamber 2, and a check valve element 11 is provided in the check valve chamber 3 so as to move vertically and freely. A back pressing force generated by a spring is applied to the check valve element 11 to energize it in the direction of valve closing. A ringlike groove 13 is provided on a lower end face of the check valve element 11, and a ringlike valve element packing 12 is fitted in this groove and is fixed by pressing it by a packing retainer 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a water stopcock used for water supply, and a multi-function for water supply having a backflow prevention function, a flow control function, an air release function, etc. in addition to an original water stop function. It relates to a stopcock.

[0002]

2. Description of the Related Art A multifunctional water stopcock for water supply has already been proposed by the present inventor as Japanese Utility Model Laid-Open No. 61-137177. This water stopcock has a water stopcock chamber and a check valve chamber in the body of the main body, and a ball stopper is accommodated in the water stopcock chamber, and the ball stopper is rotated by 90 ° from outside. By letting
The canal can be opened and closed. The check valve chamber houses a check valve body with a back pressure applied by a spring and a valve body presser whose position can be adjusted to prevent backflow and to open the valve body during normal water flow. It can be adjusted.

[0003]

However, the conventional water stopcock has the following problems and cannot be said to be sufficient for practical use. Because, first, in this conventional device, the valve body of the check valve portion is made of a copper alloy. As a result, the valve body itself has a large own weight, and the copper alloys come into contact with each other at the sliding guide portion, so that frictional friction during movement is large, and the movement of the valve body is slow. Is slow. Furthermore, in the conventional one, the packing of the check valve body is
Since the packing is completely integrated with the valve, when the packing is worn, the entire valve must be replaced, which is uneconomical.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a multi-function water stopcock for a water service, in which a check valve body operates lightly and a backflow prevention function can be quickly and reliably performed. Another object of the present invention is to provide a multi-function water stopcock for water service in which the valve body packing of the check valve body is replaceable and can be easily replaced with a new one when worn out.

[0005]

The technical means of the multifunctional water stopcock for water supply according to the present invention comprises: a main body having a water stopcock chamber and a check valve chamber; A housed ball stopper, a check valve body movably housed in a check valve chamber, a packing box also serving as a lid of the check valve chamber, a valve rod rotatably mounted on the packing box, A valve body retainer that is screwed into the valve stem and moves by rotation of the valve stem, a spring interposed between the check valve body and the valve body retainer, and an open end of an air vent hole provided in the valve stem. The check valve is made of synthetic resin. The check valve is made of a synthetic resin, and a valve packing is detachably attached to an end face of the check valve.

[0006] Further, the valve body packing is formed in a ring shape, and this valve body packing is fitted into a ring-shaped groove formed in the end face of the check valve body, and is provided with a packing retainer detachable from the check valve body. You may make it hold down and fix.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a water stopcock according to the present invention is described below.
A description will be given based on an embodiment of the drawings. As shown in FIG. 1, the main body 1 has a water stopcock chamber 2 and a check valve chamber 3. A ball stopper 4 having a water hole 5 is rotatably accommodated in the stopcock chamber 2. 6 is a ball seat made of synthetic resin,
Reference numeral 7 denotes a detachable ball holder. An inflow port 8 formed in the main body 1 communicates with the stopcock chamber 2. 9 is a stopcock room 2
And a water passage opening provided in a partition wall between the valve and the check valve chamber 3.

As shown in FIG. 2, the ball stopper 4 can be rotated by an operation lever 10, and by turning it 90 °, the open / close state of the stopper is switched. In the open state, the water that has entered through the inflow port 8 flows through the water hole 5 of the ball stopper 4.
And flows into the check valve chamber 3 through the water opening 9 of the partition wall,
In the closed state, this water flow is shut off. The operation lever 10 is detachable, and by removing it,
Theft can be prevented.

A check valve body 11 is accommodated in the check valve chamber 3 so as to be vertically movable. As shown in FIG. 3, the check valve body 11 has a hollow cylindrical shape having a closed lower end surface. Also,
The material is made of synthetic resin. For example, a material such as polyoxymethylene (polyacetal) which has water resistance and corrosion resistance, is hard to age, and does not adversely affect water quality is selected and used. . A valve packing 12 made of synthetic rubber is attached to a lower end surface of the check valve 11. The valve body packing 12 has a ring shape, is fitted into a ring-shaped groove 13 formed on the lower end surface of the check valve body 11, is pressed down from above by a packing presser 14, and is fixed. The packing retainer 14 is detachably fitted and fixed in the hole 15 of the check valve body 11. Therefore, the valve packing 12 can be easily replaced by removing the packing presser 14.

An elastic pressing force is applied to the back surface of the check valve body 11 by a spring 16, and the valve body 11 is constantly pressed in the valve closing direction. However, since the force of the spring 16 is weak, when the ball stopper is in the open state, water pushes up the valve body 11 by water pressure, flows through the water passage opening 9 and flows into the check valve chamber 3. Reference numeral 17 denotes a packing box also serving as a lid of the check valve chamber 3, which is fixedly screwed to the main body 1. This packing box 1
The lower inner surface of 7 serves as a sliding guide surface when the check valve body 3 moves up and down.

The valve stem 1 is inserted through the packing box 17.
8 is rotatably mounted. The lower portion of the valve stem 18 is a threaded portion, and a valve body retainer 20 is screwed into the threaded portion. Therefore, when the valve stem 18 is rotated by the handle 21, the valve body presser 20 moves up and down. The valve body presser 20 has a protrusion formed on a side surface thereof fitted into a vertical groove formed on the inner surface of the packing box 17 and can move up and down, but cannot rotate. I have.

The check valve body 11 collides with the valve body retainer 20 when the check valve body 11 is pushed up by water pressure and rises. Therefore, by adjusting the vertical position of the valve body presser 20, the highest position of the check valve body 11 can be regulated, and the flow rate of water can be adjusted.
An elastic cushioning material is attached to the lower surface of the flange portion of the valve body retainer 20 so as to absorb and reduce the impact at the time of the valve body collision.

The valve stem 18 is provided with an air vent hole 23 so as to penetrate the center. Reference numeral 20 denotes a stop screw attached to the upper end opening of this hole. Therefore, the stop screw 24
By removing the air, air can be discharged from the inside of the check valve chamber 3 to the outside. This air release is used to discharge air remaining in the plugs and pipes to the outside, for example, after the execution of plumbing work. The air vent hole 23 can also be used to mount a pressure gauge here to measure the water pressure in the pipeline.

An outlet 25 of the main body 1 communicates with the check valve chamber 3, and an expansion joint 26 is attached to the outlet 25. As shown in FIG. 1, the expansion joint 26 includes a movable short pipe 27, a gland packing 28, a cap nut 29 for fixing, and a cap nut 30 for pipe connection.

Next, the operation of the water stopcock will be described. When the ball stopper 4 is in the open position, the water entering through the inlet 8 reaches the water passage opening 9 through the water hole 5 of the stopper. The water passage opening 9 is always closed by the check valve body 11, but the force of the spring 16 acting on the back surface of the valve body is weak, so that the check valve body 11 is pushed up by water pressure, The water flows into the check valve chamber 3 and further to the outlet 25.

When the inflow of water is stopped or a reverse flow is attempted, the check valve 11 is pushed by the spring 16 and
It sits on the water flow opening 9 and closes the hole to prevent backflow. The non-return valve body 11 is made of synthetic resin and is light. In addition, since the sliding guide portion with the packing box 17 made of copper alloy comes into contact with the synthetic resin and copper alloy, the frictional resistance is small. Compared to the copper alloy, the non-return operation is more agile and is not affected by its own weight, so that the non-return operation can be performed reliably and quickly regardless of the installation angle. Also, when the valve body packing 12 is worn, the packing presser 14 can be removed and replaced with a new one easily.

The amount of rise of the check valve body 11 when water is passed, that is, the amount of opening, can be adjusted by turning the handle 21 and moving the position of the valve body retainer 20 up and down. Therefore, the flow rate can be freely adjusted according to the level of the water pressure of the tap water. Further, if the operation lever 10 is rotated by 90 °, the water passage can be opened and closed. Therefore, when the valve packing 12 is replaced, the flow of water can be stopped and the replacement can be easily performed. Further, if the stop screw 24 is removed, the check valve chamber 3 and the outside communicate with each other, so that air can be easily removed from the valve chamber and the pipe.

The present invention is not limited to the above embodiment, but can be freely modified and implemented within the scope of the claims. In particular, the shape of the check valve body 11, the type of synthetic resin as the material, the material and shape of the valve body packing 12,
The type of attachment to the check valve body 11 is arbitrary.

[0019]

The water stopcock according to the present invention has a backflow preventing function, a flow regulating function, an air venting function, etc. in addition to the opening / closing function of the water passage, and all these functions can be reliably performed. . Further, in the water stopcock of the present invention, the check valve body is made of synthetic resin, so that it is lighter and has lower frictional resistance on the sliding guide surface than the conventional copper alloy, so that the reverse The movement at the time of the stop operation is agile, and when the backflow occurs, the backflow can be instantaneously prevented, and the check function can be reliably performed at any installation angle. Further, in the present invention, since the valve body packing is detachable from the check valve body, it can be easily replaced with a new one when worn out, and the entire check valve body is replaced as in the prior art. It is more economical than the system.

According to the second aspect, the valve packing can be replaced simply by removing the packing retainer, so that the packing replacement operation can be performed easily and quickly.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of a water stopcock according to the present invention.

FIG. 2 is a side view of a water stopcock.

FIG. 3 is an enlarged sectional view of a check valve body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body copper 2 Stop cock room 3 Check valve room 4 Ball stopper 5 Water passage hole 8 Inlet 9 Water passage opening 10 Operating lever 11 Check valve body 12 Valve packing 14 Packing presser 16 Spring 17 Packing box 18 Valve Rod 20 Valve body retainer 21 Handle 23 Air vent hole 24 Stop screw 25 Outlet 26 Expansion joint

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H054 AA03 BB03 BB16 DD01 DD08 EE04 GG02 3H055 AA16 CC03 GG01 GG22 GG23 GG31 3H058 AA03 BB22 BB24 BB37 CA14 CA22 CA32 CC02 CD05 DD02 DD19 EE02

Claims (2)

[Claims] 1. A main body having a stopcock chamber and a check valve chamber, a ball stopper housed in the stopcock chamber so as to be openable and closable, and a reverse body movably housed in the check valve chamber. A valve body, a packing box also serving as a lid of a check valve chamber, a valve rod rotatably mounted on the packing box, a valve body press screwed with the valve rod and moved by rotation of the valve rod, and a reverse. It consists of a spring interposed between the valve body and the valve body retainer, and a stop screw for blocking the open end of the air vent hole provided in the valve rod.The check valve body is made of synthetic resin, A multi-function water stopcock for water supply with a valve packing removably attached to the end face of the valve stop. 2. The valve body packing is ring-shaped, fitted into a ring-shaped groove formed on an end face of the check valve body, and
The water stopcock according to claim 1, wherein the water stopcock is fixed to the check valve body by being pressed down by a detachable packing presser.