JPH0444146B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a water stop valve that controls the flow rate of water and a non-return check in which a water pressure gauge and a water theft prevention lid body can be attached and detached.

<Conventional technology> Conventional water stop valves are connected to key points of buried water pipes, and are used during water work, such as connection work between new water pipes and main pipes (water supply side), or during underground excavation. Non-return valves are used exclusively for repair work such as when water is damaged or to interrupt water supply in emergencies, and non-return valves are used exclusively to prevent backflow due to fluctuations in water pressure. It was limited to a single function, such as a faucet or check valve.

<Problem to be solved by the invention> However, as mentioned above, the stop valve and check valve in the conventional example have only a single function, so it is usually necessary to connect both devices in the middle of the water pipe. It was hot.

Therefore, the work becomes unreasonably complicated and the cost becomes high.

SUMMARY OF THE INVENTION Accordingly, the present invention aims to eliminate the drawbacks of the above-mentioned conventional examples and provide a water stop valve that is suitable not only for water stop functions but also for back check and water control functions, for preventing water theft, and for measuring water pressure.

<Means for solving the problem> A check valve that can be operated to control water and a water stop valve are installed in the passageway in the valve housing leading from the water inlet to the water supply port, and the valve of the check valve is A water flow gap is provided on the shaft that communicates from the inside of the valve chamber to the outside, and a water pressure gauge can be attached or detached freely.

<Function> By closing the water stop valve, the water passage leading from the water inlet to the water supply port is completely blocked, and when the water stop valve is in the open state, pressure is applied to the water flow leading from the water reception port to the water supply port. When there is a fluctuation, when the water pressure on the water inlet side, i.e., the secondary side, of the water stop valve becomes higher than that on the water inlet side, i.e., the primary side, the water shutoff action works, and the opening degree of the check valve can be adjusted by operating the handle. It is possible to control the amount of water flowing and also perform a water shutoff operation. Further, the vertical groove formed in the threaded portion of the spindle acts as a communication path to the water pressure gauge.

<Embodiment> The present invention will be described in detail below with reference to an embodiment shown in the drawings. As shown in FIGS. By forming a partition wall 4 in the middle of the water passage leading to the water inlet 3 formed on the side, a primary valve chamber 5 communicating with the water inlet 2 and a secondary valve chamber 10 communicating with the water inlet 3 are configured. A water passage hole 4' is formed in the center of the partition wall 4, and a spherical valve body 6 is provided in the primary side valve chamber 5 with a passage hole 4 that communicates from the water receiving port 2 to the water passage hole 4'.
As shown in FIG. 3, it is rotatably supported on the left and right side walls of the valve housing 1 by a shaft 9 and a shaft end 8' of an operating shaft 8.
The operating shaft 8 is held by tightening it to the valve housing 1 with a cap nut 32.

Next, in the valve chamber 10, the stem of the check piece (valve body) 12 facing the water passage hole 4' is slidably inserted into the central vertical hole 18 of the spindle 15, and The spindle 15 is screwed into a spindle holder 13 that is screwed onto the valve housing 1 in a watertight manner so as to be movable up and down.Moreover, there is a spring between the washer 11 on the block body 12 and the inner annular groove of the spindle holder 13. 1
4, the block body 12 is always pressed against the edge of the water passage hole 4' against the spindle holder 13, thereby blocking water flow from the valve chamber 10 to the valve chamber 5.

The spindle 15 has a rectangular shaft-like protrusion 17 having a square surface formed on the outer side of the upper half of the spindle 15, and is fitted into a rectangular square hole 21 formed in the lower half of the handle shaft 20 so as to slide. A cap nut 19 is movable and is fitted onto the handle shaft 20 from the upper part of the flange 23.
is screwed onto the upper end edge of the spindle holder 13 via a washer 23' to stably hold the handle shaft 20 while allowing free rotation.

The handle 25 is fitted into the square portion 22 at the upper end of the handle shaft 20, and the central screw hole 2 of the shaft 20 is fitted.
The handle 25 and the handle shaft 20 are made integral by screwing together the screw 26 toward the handle 25. Incidentally, one or more vertical grooves 16 are cut in the threaded portion of the spindle 15 along the axial direction of the spindle 15 so that the protrusion 17 of the upper half of the spindle from the valve chamber 10 and the square hole 21 are formed. It communicates with the screw hole 24 through a small gap.

Further, at the upper end of the spindle holder 13, instead of the handle shaft 20, a lid body 2 is fitted with a cap nut 19 for attachment on the outside as shown in FIG.
7 is screwed while inserting the protrusion 17 into the space in the lower half, thereby preventing unwanted water passage.

Also, in place of the screw 26, a water pressure gauge 29 shown in FIG.
The mounting screw portion 30 is configured to be attachable to and detachable from the upper end portion of the handle shaft 20. Note that the reference numeral 34 in the figure indicates a connecting pipe.

Next, to describe the operation in each mode of use, first, when used as a water stop valve, the cap 33 covering the outer end of the cap nut 32 is removed regardless of the posture of the block body 12, and the operating shaft 8 is removed. By fitting the handle into the square part 31 at the outer end of the valve body and rotating the spherical valve body 6 by 90 degrees in the opposite direction as shown in FIG. Since it prevents water from flowing to the next side, it can be used as a permanent water stop when disposing of the existing pipe on the secondary side, or temporarily for construction purposes when connecting a new pipe on the secondary side. can do.

Therefore, even if the handle 25 is operated by mistake, water will not flow to the secondary side, and troubles such as inadvertent water leakage and water theft will not occur. Furthermore, when the spherical valve body 6 is kept in a state where water is allowed to flow and the handle 25 is kept in a relaxed state, the body 12 is pressed against the mouth edge of the water passage hole 4' by the spring 14, but the spindle 15 At this time, when water flows in the forward direction from the water intake port 2 to the water supply port 3, the block body 12 is pushed open against the spring 14 to maintain a steady flow, and also to prevent water pressure fluctuations. When water pressure on the primary side becomes lower than the water pressure on the secondary side and attempts to flow backwards, the internal pressure of the valve chamber 10 becomes higher than the internal pressure of the valve chamber 5, and the synergistic action with the spring 14 causes the block body 12 to immediately close the water passage hole 4. ’ to block the water passage hole and prevent backflow. To adjust the amount of water flowing to the secondary side, the handle 25 is rotated, and the operating shaft 20 transmits rotation to the spindle 15.

Therefore, the spindle 15 is the spindle holder 1
3 to lower the gap between the lower end surface and the washer 11 to limit the opening degree of the block body 12 and adjust the water flow rate, or to lower the spindle 15 to the lower limit. It also has the function of a water control valve, such as pressing the top body 12 into an immovable state and completely blocking water flow.

Furthermore, remove the screw 26 of the handle 25 (with the handle as it is) and insert the screw part 3 of the water pressure gauge 29 into the screw hole 24.
0 and turn the handle in this state to encourage water to flow into the valve chamber 10.
A part of the water flow inside enters the water pressure gauge 29 through the vertical groove 16, the gap between the protrusion 17 and the square hole 21, and the central hole of the threaded part 30, so by rotating the handle, each passage can be adjusted. It is possible to instruct the water supply pressure according to the amount of water.

If water pressure measurement or use as a water control valve is not required, remove the operating shaft 20 together with the cap nut 19 and attach the cover 27 shown in FIG. 6 to the upper end of the spindle holder 13 using the cap nut 19. By screwing, it becomes impossible to operate the spindle 15 from the outside, and as a result, water theft can be prevented.

<Effects of the Invention> As described above, the present invention has the original water stop function of a water stop valve by operating the spherical valve body, and also has a non-return function by installing a valve body made of a piece body. It also functions as a valve, and does not backflow even when water pressure fluctuates, so you can use it with confidence as dirty factory water will not mix with your cooking water or laundry water.

In addition, by adjusting the operating range of the top body with a spindle connected to the handle, it can be made to function as a normal water volume adjustment valve, that is, a water control valve, and a water pressure gauge can be attached to the upper end of the operating shaft, making it easy to use special tools or Since water pressure can be measured without using any auxiliary equipment, water distribution management is easy.

In addition, by replacing the handle operating shaft with the lid body and attaching it, the shaft end of the spindle can be covered, preventing water theft and arbitrary changes in water flow rate, and many other functions can be achieved with one water stop valve. Since the valves can be mounted on their own, there is no need to install them, unlike in the case of using dedicated valves for each function, which significantly improves work efficiency, and there is no need to forget to attach them, making repairs easy, etc. This is an ideal invention with many excellent effects.

[Brief explanation of the drawing]

1 to 6 show embodiments of the present invention. Fig. 1 is a partially exploded perspective view, Fig. 2 is a central vertical side view, Fig. 3 is a sectional view taken along YY line in Fig. 2, Fig. 4 is a sectional view taken along line XX in Fig. 2, and Fig. 5 The figure is a perspective view of the water pressure gauge, and FIG. 6 is a longitudinal sectional view of the lid. DESCRIPTION OF SYMBOLS 1... Valve housing, 2... Water inlet, 3... Water inlet, 4... Partition wall, 6... Spherical valve body, 12... Piece body, 13... Spindle holder, 15... Spindle, 16... Vertical groove,
20...Handle shaft.

Claims (1)

[Claims] 1. The interior of the valve housing is divided by a partition wall into a valve chamber communicating with the water intake port and a valve chamber communicating with the water supply port, and both valve chambers are communicated with each other by a water passage hole drilled in the partition wall, and the above-mentioned A spherical valve is installed in the valve chamber leading to the water inlet, and a check piece facing the mouth edge of the water inlet is screwed into the spindle holder fixed on the valve chamber in the valve chamber leading to the water inlet. The spindle is loosely inserted into the inner end of the mated spindle, and the spindle has a square shaft-like protrusion on its upper end that engages with the square hole of the handle shaft, and at least one thread along the axial direction on the surrounding threaded part. A water stop valve is formed by cutting a vertical groove so that the valve chamber communicates with the inside of the square hole so that a water pressure gauge can be attached to the upper end of the handle shaft.