JP2587427Y2 - Electric valve - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric valve.

[0002]

2. Description of the Related Art In winter, water pipes often crack or rupture. This is because the water accumulated in the water pipe freezes. Therefore, if the water in the water pipe is discharged and emptied in a timely manner, such an accident can be prevented. However, since the water pipe is made of metal and straight, it is difficult to completely drain water, and it takes time and effort to provide a valve.

Therefore, the present inventors have studied this problem, and as a result, have come up with the idea of using a flexible rubber hose or the like instead of the conventional metal water pipe, and provided a drainage valve in the hanging part of the hose. Came up with the idea of placing However, it is desirable that the valve has a structure that operates automatically, and that it also operates reliably. Furthermore, it is desirable that the electricity usage fee and the like be low.

Therefore, the present inventor conducted an experiment using an electromagnet in which a plunger was used as a valve rod and the plunger was directly moved up and down by energizing a coil to open and close the valve. It has been found that there is a problem that the electricity must be continuously supplied and the electricity usage fee increases. Further, the plunger as a valve stem is always urged by a pressure-expanding spring so as to close the valve. For this reason, it was also found that when the power supply was stopped at the time when the water became rough, there was a problem that a small amount of water droplets remained.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and when a valve is opened to drain water, the open state is maintained for a long time, thereby completely draining water. Prevents the valve from malfunctioning due to freezing of water droplets,
Another object of the present invention is to provide a motor-operated valve capable of saving electricity usage fee required for opening and closing the valve.

[0006]

SUMMARY OF THE INVENTION Accordingly, the gist of the present invention is to provide a valve body having a valve box at a lower portion, and having an inflow port at a side portion of the valve box and a discharge port at a bottom portion. A valve stem supporting member attached to the top of the valve body, slidably penetrating a valve stem to be described later, and hollow to accommodate a ratchet wheel to be described later, and provided with a vertical keyway at a lower central portion. And a valve for opening and closing a discharge port of the valve box at a lower end portion, and a valve for opening and closing an upper opening portion of the valve box at an intermediate portion in an axial direction, and further for raising and lowering the valve stem on a peripheral surface of an upper end portion. A ratchet wheel provided with a cam groove and a key fitted in the key groove, and a ratchet wheel fitted on the upper end of the valve rod so as to be slidable and having an inner surface provided with a guide pin fitted in the cam groove. And a solenoid fixed to the side surface of the valve body so as to be orthogonal to the valve stem. , Connected to the tip of the plunger of the solenoid, in the electric valve comprising a spring plate provided with hook applied to the pawl of the ratchet wheel to tip.

[0007]

Next, the operation of the present invention will be described. When the solenoid is operated intermittently for a predetermined time, the hook of the spring plate connected to the tip of the plunger catches on the ratchet wheel claw and pulls it. This causes the ratchet wheel to rotate intermittently in the horizontal direction. When the ratchet wheel rotates, a guide pin provided on the inner surface of the ratchet wheel slides in a cam groove formed on a peripheral surface of an upper end portion of the valve stem. As a result, the valve stem intermittently gradually descends or rises, and the valve provided at the lower end of the valve stem opens and closes. The solenoid may be operated only when the valve is opened or closed, and after the valve is completely opened, the state is maintained even if the energization is stopped.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a main part in cross section, FIG. 2 is a plan view, FIG. 3 is a central longitudinal sectional view of a valve body, and FIG.
FIG. 5 is a plan view of the same, FIG.
7 is a front view of the valve stem, FIG. 8 is a plan view of the same, FIG. 9 is a bottom view thereof, FIG. 10 is a side view thereof, FIG. 11 is a central longitudinal sectional view of a ratchet wheel, and FIG. 13 is a bottom view, FIG. 14 is a front view of a spring plate, FIG. 15 is a plan view, FIG. 16 is a side view, FIG. 17 is a front view of a reverse rotation preventing member, and FIG. is there.

In FIG. 1, reference numeral 1 denotes a valve body having a valve box 1a at a lower portion. The valve body 1 is provided with inlets 2, 2 on the side of the valve box 1a and a discharge port 3 on the bottom. Reference numeral 4 denotes a valve stem supporting member which is attached to the top of the valve body 1 and which slidably penetrates a later-described valve stem. The valve shaft support member 4 is hollow so that a ratchet wheel, which will be described later, can be accommodated therein, and has a vertical keyway 5 at a lower central portion.

Reference numeral 6 denotes a valve stem, which is provided with a valve 7 for opening and closing the discharge port 3 at a lower end and a valve 8 for opening and closing the upper opening of the valve box 1a at an axially intermediate portion. A cam groove 9 into which a guide pin of a ratchet wheel described later is slidably fitted is provided on the peripheral surface of the upper end portion of the valve rod 6. The cam groove 9
Are formed obliquely with respect to the axis of the valve stem 6 in order to vertically move the valve stem 6. Further, the valve stem 6 is provided with a key 10 that fits into the key groove 5. Reference numerals 11 and 12 denote O-rings attached to the valves 7 and 8, respectively.

A ratchet wheel 13 is slidably fitted on the upper end of the valve rod 6. Further, a guide pin 14 that fits into the cam groove 9 is provided on the inner surface of the ratchet wheel 13. 13 is a ratchet wheel claw. Furthermore, the ratchet wheel 13
Is provided with a circular concave portion on the upper surface thereof into which a reverse rotation preventing member described later is inserted, and a claw 13b is formed on the inner surface of the concave portion so that a projection spring of the reverse rotation preventing member comes into contact.

Reference numeral 15 denotes a solenoid, which is fixed to a side surface of the valve body 1 via a support 16 so as to be orthogonal to the valve rod 6. Reference numeral 17 denotes a spring plate connected to the tip of the plunger 15a of the solenoid 15, and a hook 17a hooked on the claw 13a of the ratchet wheel 13 at the tip.
Is provided.

Reference numeral 18 denotes an annular main body portion 18a which is
The ratchet wheel 13
Is a reversal prevention member in which the projecting springs 18b, 18b contacting the claws 13b are formed in a cantilever shape. The reverse rotation preventing member 18
Is used to prevent the ratchet wheel 13 from rotating in the reverse direction. The other 19 is a coil spring.

[0014]

[Effect of the Invention] The present invention has the above-described configuration and operation.
When the valve is opened and water is drained, the open state is maintained for a long time, thereby completely draining water and preventing the valve from being inoperative due to freezing of water droplets. It can save electricity usage fee. Therefore, when a flexible rubber hose or the like is used instead of a metal water pipe, it is most suitable for use as a valve for draining water.

[Brief description of the drawings]

FIG. 1 is a front view showing a cross section of a main part of an embodiment of the present invention.

FIG. 2 is a plan view of one embodiment of the present invention.

FIG. 3 is a central longitudinal sectional view of a valve body.

FIG. 4 is a plan view of the valve body.

FIG. 5 is a central longitudinal sectional view of a valve stem bearing member.

FIG. 6 is a plan view of a valve stem supporting member.

FIG. 7 is a front view of a valve stem.

FIG. 8 is a plan view of a valve stem.

FIG. 9 is a bottom view of the valve stem.

FIG. 10 is a side view of a valve stem.

FIG. 11 is a central longitudinal sectional view of the ratchet wheel.

FIG. 12 is a plan view of a ratchet wheel.

FIG. 13 is a bottom view of the ratchet wheel.

FIG. 14 is a front view of a spring plate.

FIG. 15 is a plan view of a spring plate.

FIG. 16 is a side view of a spring plate.

FIG. 17 is a front view of a reverse rotation prevention member.

FIG. 18 is a plan view of a reverse rotation prevention member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve body 4 Valve stem supporting member 5 Key groove 6 Valve stem 7 Valve 8 Valve 9 Cam groove 10 Key 13 Ratchet wheel 14 Guide pin 15 Solenoid 17 Spring plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A valve body having a valve box at a lower portion and having an inflow port on the side of the valve box and a discharge port on a bottom thereof, and a valve rod attached to the top of the valve body and sliding a valve rod to be described later. A valve stem supporting member which penetrates freely, is hollow so that a ratchet wheel to be described later can be inserted therein, and has a vertical key groove at a lower center portion, and a valve which opens and closes a discharge port of the valve box at a lower end portion, A valve provided at an axially intermediate portion for opening and closing an upper open portion of the valve box, and further provided with a cam groove on an upper end portion peripheral surface for lifting and lowering the valve rod and a key fitted into the key groove. A rod, a ratchet wheel which is slidably fitted to the upper end of the valve rod and has a guide pin fitted into the cam groove on the inner surface, and fixed to a side surface of the valve body so as to be orthogonal to the valve rod Connected to the end of the plunger of the solenoid A spring plate provided with a hook portion hooked on a pawl of the ratchet wheel.