JPH0529431Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a remote-controlled drain valve for cold regions using a solenoid.

Traditionally, there have been two ways to electrically remotely control a water drain valve in cold regions: motor-driven methods and solenoids; however, motor-based methods require complicated drive and control devices and are expensive. In addition, there was also a lack of reliability in terms of longevity. On the other hand, the use of solenoids simplifies the drive and control devices and can withstand long-term use. There are some that use a spring as a reaction force to operate the main valve with a pilot valve, and some of these have been realized. However, when the valve is operated directly by a solenoid, there are problems with impact noise caused by water hammer and damage to equipment, and the use of two solenoids is uneconomical. On the other hand, if a pilot is used, the problem of water hammer can be eliminated, but it has the disadvantage that either the opening or closing valve must be kept energized, which increases electricity costs.

In view of the above problems, the purpose of this invention is to eliminate water hammer by using a pilot valve, and to provide a remote-controlled water drain valve that uses a single solenoid and does not need to be kept energized. shall be.

The configuration of the present invention to achieve the above object is as follows: a valve box having an inlet, an outlet, and a drain port, a main valve that reciprocates within the valve box and closes to a drain state when pressurized water acts on the pressure receiving surface, a pilot valve that is provided separately from the main valve and opens and closes the action port of the pressurized water acting on the pressure receiving surface of the main valve, a solenoid and an iron core housed in an operating valve box connected to the valve box by a jacket tube,
A valve is connected to the pilot valve via a shaft.
The device is basically composed of a rod with two pins drilled vertically and perpendicular to the axis, and a rod that is always pressed in one direction by a spring, and a rotating rod support that only rotates, located between the two pins so as to surround the rod, with inclined surfaces that incline in opposite directions at equal intervals on the upper and lower end faces of a flange provided in the center, and further with grooves at the bottom of the inclined surface at one end, the length of which corresponds to the stroke of the pilot valve, provided every other groove.
When electricity is applied to the solenoid, the movement of the iron core is transmitted to the rod, and in cooperation with a spring biased in the opposite direction to the iron core, the up and down movement of the two pins rotates the rotating rod support at a fixed angle in a fixed position via an inclined surface. Whether one of the pins enters the groove determines the up and down stroke of the pilot valve connected to the rod via a shaft, and whether the pilot valve opens or closes the pressurized water action port controls the pressurized water acting on the pressure-receiving surface of the main valve, thereby selecting the water supply or drainage state of the main valve.

Next, the present invention will be explained based on the embodiment shown in the drawings. Figs. 1 and 2 are longitudinal cross-sectional views showing the state of drainage. A valve seat 3 is provided below, and a second cylinder part 4 is provided below it on the same axis, and an inlet 5 is arranged on a peripheral wall surface between the first cylinder part 2 and the valve seat 3. , an outlet 6 is arranged on the peripheral wall surface between the valve seat 3 and the second cylinder part 4,
A drain port 7 is provided below the second cylinder portion 4. A bypass hole 8 communicates between the upper part of the first cylinder part 2 and the inflow port 5, and a pressure receiving surface 9 is provided on the upper surface of the first cylinder part 2, the valve seat 3, and the second cylinder part 4. Through hole 10 on its central axis
The main valve 11 provided with the main valve 11 can be moved up and down in the vertical direction, and the main valve 11 has a first ring-shaped packing 12 at the upper part of the circumferential side thereof, a second ring-shaped packing 13 at the lower part,
A waterproof intermediate gasket 14 is installed in the middle. A pilot valve box 15 is provided above the main valve 11 and fixed at an appropriate position with respect to the valve box 1, and a third cylinder section 16 and a fourth cylinder section are installed inside the pilot valve box 15 from above. 17, 5th
The cylinder part 18 is arranged, and the third cylinder part 1
6 and the fourth cylinder part 17 = Pressure water operation port 19 communicating with the bypass hole 8 on the side surface of the peripheral wall, and between the fourth cylinder part 17 and the fifth cylinder part 18 = The main valve 11 on the side surface of the peripheral wall. a pressure outlet 20 that allows pressure water to pass through the pressure receiving surface 9; and the fifth cylinder portion 1.
A pressure water drain port 21 is provided below the pressure water drain port 8, and the upper end of the main valve 11 is slidably inserted into the pressure water drain port 21 via a seal rubber without coming off. The pilot valve 22 is made to be able to rise and fall astride the third cylinder part 16, the fourth cylinder part 17, and the fifth cylinder part 18, and a third ring-shaped packing 23 and a third ring-shaped packing 23 are provided on the side surface of the peripheral wall of the pilot valve 22. Attach the 4th ring-shaped packing 24 and the 5th ring-shaped packing 25,
The pilot valve 22 is connected to a rod 30 through a shaft 37, and the rod 30 is connected to an iron core inside a solenoid 28 housed in an operating valve box 27 connected to the valve box 1 through an outer shell pipe 26. 29
It is linked with. Further, as shown in FIGS. 3 and 4, two pins 31 and 32 are bored perpendicularly to the axis of the rod 30 at approximately the center position with a gap between them. A cylindrical rotating rod support 33 with a brim is attached to the rod 30.
It is provided so as to surround it, so that only rotational movement can be performed at a fixed position. On the upper and lower end surfaces of the rotary rod support 33, inclined surfaces 34 and 35 which are inclined in opposite directions are provided at equal intervals and at equal pitches. A groove 36 is provided with a depth of . Further, the rod 30 is constantly pressed upward by a spring 38. The relationship between the pins 31, 32 and the upper and lower inclined surfaces 34, 35 is such that the upper and lower inclined surfaces 34, 35 are located on the same axis as in the embodiment, and the axes of the pins 31, 32 are slightly shifted. Alternatively, the pins 31 and 32 may be provided on the same axis so that the axes of the upper and lower inclined surfaces are different.

Next, embodiments will be described.

1 to 4, when a current is applied to the solenoid 28 housed in the operation valve box 27 for a time sufficient for the solenoid to function (approximately 0.5 to 1 second), the iron core 29 is attracted by magnetic force. , spring 3
Lower the rod 30 while compressing the rod 8. Rotating rod support 3 is installed between pins 31 and 32 provided on rod 30 so that it can rotate freely without moving up and down.
The pin 31 contacts the upper inclined surface 34 of the rotary rod support 33. At this time, the rod 30 is attached to the ring-shaped packing 2 of the pilot valve.
Since the frictional forces of 3, 24, and 25 and the pressing force of the spring 38 are sufficiently greater than the rotational force of the rotating rod support 33, only vertical movement is performed without rotation. When the current is turned off, the magnetic force acting on the iron core 29 disappears, and the rod is pushed upward by the spring 38. This time, the pin 32 rotates while contacting the lower inclined surface 35 of the rotating rod support 33, and the inclined surface 35
The pilot valve 22, which is connected to the rod via a shaft, is raised. Therefore, the fifth ring-shaped packing 25 of the pilot valve 22, which had been separated from the fifth cylinder part 18 in the pilot valve box 15, is inserted into the fifth cylinder part 18, and at the same time, the fifth ring-shaped packing 25 is inserted into the fifth cylinder part 18.
The ring-shaped packing 24 separates from the fourth cylinder portion 17. Therefore, the pressure water that entered from the inlet 5 passes through the bypass hole 8, the pressure water action port 19, and between the pilot valve 22 and the fourth cylinder portion 17.
Water pressure is applied downward to the pressure receiving surface 9 of the main valve 11 through the pressure outlet 20. For this reason, a water-stopping intermediate gasket 14 is pressed against the valve seat 3 in the valve box 1, thereby shutting off water from the inlet 5. The water on the side of the extraction port 6 loses pressure, and the second ring-shaped gasket 13 of the main valve 11, which had been inserted into the second cylinder part 4, separates from the second cylinder part 4 due to the lowering of the main valve 11. The outflow port 6 communicates with the drain port 7, and the water in the pipe is drained.

Next, as described above, when a current is applied to the solenoid 28 for a very short time, the iron core 29 is attracted by the magnetic force, and the rod 30 is lowered while compressing the spring 38.
The pin 31 is attached to the upper inclined surface 34 of the rotating rod support 33.
When the rod 30 contacts the rotary rod support 33 and the current is cut off, the rod 30 is raised by the spring 38, and at this time the pin 32 is released from the groove 36 and rotates to the bottom of the next lower inclined surface 35 without the groove. This prevents the pilot valve from rising any further. Therefore, the pilot valve 22 has been lowered by the depth of the groove, and the fourth ring-shaped packing 24 provided on the pilot valve 22 in the pilot valve box 15 is inserted into the fourth cylinder part 17, and the fifth ring-shaped packing 24 is inserted into the fourth cylinder part 17. The ring-shaped packing 25 is the fifth cylinder part 1
8 and the pressure water that was applied to the pressure receiving surface 9 of the main valve 11 is transferred to the pressure outlet 20 and the fifth cylinder part 1.
8 and the pilot valve 22, and reaches the drain port 7 via the pressure water drain port 21 and the through hole 10 of the main valve 11. Since the pressure receiving surface 9 becomes atmospheric pressure, the main valve 11 is pushed upward by the water pressure from the inlet 5, the water stop intermediate packing 14 is detached from the valve seat 3, and the second ring-shaped packing 13 is moved to the second ring-shaped packing 13. Water inserted into the cylinder portion 4 and supplied from the inlet 5 flows to the outlet 6 via the valve seat 3.

Other embodiments are not shown in the drawings, but
In the solenoid type solenoid, in which the iron core is pulled up by magnetic force when the solenoid is energized, the groove 36 of the rotating rod support 33 is provided at the bottom of the upper inclined surface, and the spring 3
The direction of the force applied to the rod 30 by the rod 8 must be directed downward.

As mentioned above, the remote-controlled water drain valve of the present invention uses a pilot valve system, which prevents water hammer caused by sudden closing of the valve, and with a single solenoid, the solenoid is energized in both open and closed states. There is no need to hold it in this state, and the drain valve can be switched to the next state by simply turning on electricity for about 1 second during operation, which has the effect of requiring almost no electricity bill.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a valve part showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of a solenoid part, and FIGS. 3 and 4 show a rotating rod support, a rod and This shows the connection relationship of pins. 1 is a valve box, 3 is a valve seat, 5 is an inlet, 6 is an outlet, 7 is a drain port, 9 is a pressure receiving surface, 11 is a main valve, 19
22 is a pilot valve, 26 is an outer shell pipe, 27 is an operating valve box, 28 is a solenoid,
29 is the iron core, 30 is the rod, 31 and 32 are the pins,
33 is a rotating rod support, 34 and 35 are inclined surfaces,
36 indicates a groove, 37 a shaft, and 38 a spring.

Claims (1)

[Scope of utility model registration request] A valve seat is provided at the inflow port, the outflow port, and an intermediate portion thereof, and a first cylinder is provided above the valve seat, and a bypass hole communicating with the inflow port that opens above the valve seat is provided, and a second cylinder is provided below the valve seat. cylinder,
Furthermore, there is a valve box with a drainage port below it, and a first valve box.
Equipped with a first ring-shaped packing that slides on the cylinder, an intermediate water-stopping packing that tightly contacts the valve seat to stop water, and a second ring-shaped packing that separates from the second cylinder and drains water from the downstream piping. The main valve has a through hole in the central axis, and is provided above the main valve separately from the main valve, and the pressure from the bypass hole is received at the upper end of the main valve through the pressure water application port and the pressure outlet. The main valve is closed and drained by acting on the surface, the pressure water operation port is closed, and the pressure water on the pressure receiving surface is released to the drain port through the pressure outlet and the through hole to open the main valve. In order to achieve this, the valve basically consists of a pilot valve to which the required number of ring-shaped packings are attached, a solenoid housed in an operating valve box connected to the valve box by a jacket pipe, and an iron core inside the solenoid. ,
In a water drain valve in which the main valve automatically responds to water pressure by responding to the pilot valve by magnetic force when energized, the pilot valve is a rod whose one end is pressed from one end to the other by a spring supported through a shaft. The rod is connected to the iron core located at the upper part of the rod, and the rod has two pins perpendicular to the axis perpendicular to the axis above and below it through a rotating rod support located approximately at the center outer periphery. The rotary rod support is provided with inclined surfaces inclined in opposite directions at equal intervals on the upper and lower end surfaces of the flange provided in the center, and with equal pitches to each other, and further provided with the pilot valve at the bottom of the inclined surface at one end. A pilot valve type solenoid drain valve characterized by having grooves for every other stroke.