JPH03265773A - Valve device - Google Patents

Abstract

PURPOSE:To prevent occurrence of water hammer so as to enable the prevention of noise or damage of piping, etc. and adjust the opening degree of a valve accurately and secure large flow by arranging the constitution such that the valve body contacts with or separate from a valve seat accompanying the contacting/separating action to the valve seat of a rotor attendant upon the rotation of a rotor. CONSTITUTION:When a current is applied to a stator 24, a magnetic field is generated, and a rotor is rotated by the relation with the magnetic force of the rotor 16. Next, the rotor 16 ascends while rotating, resisting a spring 22, and the quantity of ascent can be controlled by the current application time to the stator 24. Moreover, the valve body also ascends accompanying the ascent of the rotor 16, so a valve seat 30 is released, and the fluid checked inside the valve chamber 36 flows out in the direction of an outlet 38 from the valve seat 30 by fluid pressure. Next, when the current application to the stator 24 is stopped, the fastening force to the spring 22 is released, and the spring 22 tries to return by accumulated energy. Accordingly, the rotor 16 descends, being rotated in the reverse direction to the time of ascent by the spring 16, and falls to the original position. As a result, the valve body 28 blockades the valve seat 30 again, and stops the flow of the fluid inside the valve chamber 36.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a valve device.

(Prior Art) As a conventional electric valve device, one using a solenoid is often used. A valve device that simply opens and closes a valve seat has a structure in which a valve body is attached to the tip of a movable plunger of a solenoid, and the valve body is seated on the valve seat or the valve seat is opened by moving the movable plunger toward and away from the valve seat. It has become. Also,
In the case of a biloft valve that uses a diaphragm as a valve body, a movable plunger opens and closes a pilot valve seat to seat the diaphragm on the valve seat or open the valve seat.

Valve devices include those that simply open and close the valve seat as described above, and proportional control valves that perform proportional control of the flow rate. A proportional control valve adjusts the valve opening degree by controlling the stroke of a movable plunger.

(Problems to be Solved by the Invention) However, the conventional valve device described above has the following problems.

First, in the case of a valve device that simply opens and closes the valve seat, when the solenoid is energized, the movable plunger is suddenly driven and the valve body collides with the valve seat, resulting in so-called water hammer, which generates noise and There is the problem of damaging fluid piping.

In the case of a pilot valve, when the movable plunger moves in a direction away from the valve seat, the diaphragm and the movable plunger are separated and the diaphragm uses its own elasticity to open the valve seat. If the fluid pressure is low, the valve opening of the diaphragm is small and there is a problem that a large flow rate cannot be obtained.

In the case of flow control valves, a complex adjustment mechanism using a spring is installed to adjust the stroke of the movable plunger.
Furthermore, the adjustment mechanism must be adjusted individually, resulting in low manufacturing efficiency and uneconomical operation.

Therefore, it is an object of the present invention to provide a valve device that can prevent water hammer, ensure a large flow rate even when fluid pressure is low in the case of a pilot valve, and eliminate the need for a complicated adjustment mechanism in a proportional control valve. With the goal.

(Means for solving problems) In order to solve the above problems, the present invention includes the following configuration.

That is, the first configuration is a valve device that opens and closes a flow path or adjusts a flow rate by moving a valve body toward and away from a valve seat.
A female thread is formed on the outer circumferential surface or a female thread is formed on the inner circumferential surface, one end is fixed to the main body, the other end is provided with a guide arranged toward the valve seat, and a magnetic pole is arranged on the outer periphery of the guide. a rotor that is rotatably screwed into the male threaded portion or the female threaded portion, and moves toward and away from the valve seat along with the amount of rotation, and also moves the valve body toward and away from the valve seat; A second configuration is characterized in that the valve device includes a stator that is disposed close to the rotor and rotates the rotor when energized. , the other end of which is provided with a spring fixed to the rotor, and a third configuration is characterized in that in the valve device of the first configuration or the second configuration, the drive circuit of the stator is connected to the main body. It is characterized by having been installed.

(effect) The effect will be explained.

In the first configuration, the valve body moves toward and away from the valve seat as the rotor moves toward and away from the valve seat as the rotor rotates, so even if electricity is applied to close the valve, the valve body suddenly moves toward the valve seat. Since it is not seated, there is no risk of water hammer occurring. Further, even when a diaphragm valve is used as the valve body, the diaphragm moves as the rotor moves, so the valve seat can be opened sufficiently.

Furthermore, the valve opening degree can be adjusted by the amount of rotation of the rotor.

If the second configuration is adopted, even if the power supply to the stator is stopped due to a power outage or the like, the rotor can be rotated and returned to the previous position by the energy stored in the spring.

If the third configuration is adopted, the valve device itself can be made more compact.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[First example] A first embodiment will be described with reference to FIG.

Reference numeral 10 denotes a guide, and the upper end of the main body 12 made of resin is fixed by insert molding. The guide 10 is formed in a cylindrical shape, and a male mosquito part 14 is carved on the outer peripheral surface of the guide 10.

Reference numeral 16 denotes a rotor, which has a female threaded portion 18 carved in its center, and is rotatably screwed into the male threaded portion 14 of the guide 10. On the upper surface of the rotor 16, N and 5 (ff) poles are alternately magnetized in the circumferential direction.

22 is a spring, one end of which is fixed to the main body 12;
It is wound around the guide 10 and the other end is fixed to the rotor 16. The spring 22 may be a spiral spring other than the illustrated coil spring.

24 is a stake, an electromagnetic coil is formed around the yoke 26, and is fixed to the main body 12. The stators 24 are arranged so that when the stators 24 are energized, magnetic poles are generated at positions corresponding to the magnetic poles of the rotor 16.

28 is a valve body, which is fixed to the lower part of the rotor 16.

The valve body 28 is moved to the valve seat 30 by the rotor 16 moving downward.
When the rotor 16 moves upward, the valve seat 30 is opened.

Reference numeral 32 denotes a mounting portion, which is provided on the upper part of the main body 12, and a drive circuit (not shown) for controlling the supply of direct current to the stators 24 is disposed inside.

The installed drive circuit is potted with resin to make it waterproof.

The operation of the valve device configured in this way will be explained.

In the state shown in FIG. 1, the stators 24 are not energized, the rotor 16 is at the lowest position of its stroke, and the valve body 28 closes the valve seat 30.

Accordingly, fluid (eg, water) enters the body 12 through the inlet 34 and is in a stopped flow state within the valve chamber 36.

In this state, when the stator 24... is energized,
A magnetic field is generated in the stakes 24, and rotates the rotor 16 in relation to the magnetic force of the rotor 16. At this time guide 10
Since the rotor 16 is fixed, the rotor 16 rotates against the elasticity of the spring 22 and moves upward. The amount of upward movement can be controlled by the time when the stator 24 is energized. Rotor 16
As the valve element 28 moves upward, the valve seat 30 is opened, and the fluid whose flow has been blocked within the valve chamber 36 flows out from the valve seat 30 toward the outlet 38 due to fluid pressure.

To stop the fluid outflow again, stake 24...
・Stop energizing. Then, the force that was tightening the spring 22 is released, and the spring 22 attempts to return to its previous state using the stored energy. Therefore, the rotor 16 is rotated by the energy of the spring 22 in a direction opposite to the direction in which it moves upward, moves downward, and descends to its previous position. As a result, the valve body 28 is moved back to the valve seat 30.
is closed, stopping fluid flow within the valve chamber 36.

If the spring 22 is not provided, the valve seat 30
To block the block, the number is stake 24... to 0-ta 16
If a current is applied in the opposite direction to that during upward movement, the rotor 16 will rotate in the opposite direction to that during upward movement, so the rotor 16 and the valve body 28
can move downward to close the valve seat 30.

In the above embodiment, the valve body 28 moves upward to open the valve seat 30, but the valve body 28 may move upward to close the valve seat 30.

[Second Embodiment] A second embodiment will be described with reference to FIG. 2. This embodiment is a proportional control valve for adjusting gas amount.

100 is a guide whose upper end is fixed to the main body 102. The guide 100 is formed in a cylindrical shape with an opening at the lower end, and has a female threaded portion 104 carved in the inner wall surface.

106 is a rotor, and a recess 108 into which the guide 100 can be loosely fitted is formed in the center, and a male butterfly portion 110 is erected at the center of the recess I08.

The male threaded portion 110 is rotatably screwed into the female threaded portion 104. Therefore, the rotor 106 can move up and down as it rotates. The upper surface 112 of the rotor 106 is N, 5ift.
The poles are alternately magnetized in the circumferential direction.

114 is a diaphragm whose peripheral edge is fixed to the main body 102, and the inside of the main body 102 is provided with a back pressure chamber 116 to which atmospheric pressure is applied.
and a valve chamber 118.

Reference numeral 120 denotes a valve body whose upper end is fixed to the diaphragm 122 and which extends into the back pressure chamber 116 . The valve body 120 has a hemispherical upper surface shape, opens the valve seat 122 when moved downward, and closes the valve seat 122 when moved upward. The valve body 120 moves toward the valve seat 1 depending on the amount of movement of the valve body 120.
The degree to which 22 is opened (valve opening degree) changes proportionally.

124... is a stator, which has the same configuration as the first embodiment, and when DC current is applied, the rotor 106
Rotate.

Next, the operation of the second embodiment will be explained.

In the state shown in FIG. 2, the valve body 120 is in a state in which the valve seat 122 is closed by the gas supply pressure acting on the diaphragm 114, and gas entering from the inlet 126 is prevented from flowing out within the valve chamber 118.

When the stake 124... is energized to drain the gas,
As the rotor 106 rotates, it moves downward.

Then, the lower end surface of the rotor 106 pushes the upper end of the valve body 120 downward against the gas supply pressure acting on the diaphragm 114. Then, the valve body 120 moves downward and the valve seat 122
There will be a gap between the two. The cross-sectional area of the gap, that is, the valve opening increases approximately in proportion to the amount of downward movement of the valve body 120. Therefore, the adjustment of the valve opening degree is controlled by the time when the stator 124 is energized. When the space between the valve body 120 and the valve seat 122 opens, gas flows out from the valve chamber 118 to the outlet 128.

If you want to reduce or stop the amount of gas flowing out, you can apply current in the opposite direction to the stators 124...
Rotate 6 in the opposite direction and move it upward. Then, the diaphragm 114 moves upward as the rotor 106 moves upward due to the gas supply pressure, and the valve body 120 also moves upward. Then valve body 1
The gap between the valve body 120 and the valve seat 122 is reduced, and the amount of gas flowing out is reduced, and when the valve body 120 closes the valve seat 122, the gas flowing out from the outlet 128 is stopped again.

Although not provided in this embodiment, the spring 2 of the first embodiment
2 (Fig. 1) is provided in this embodiment, for example, even if there is a power outage while gas is flowing out, the force of the spring to return to the previous state will cause the valve body 120 to press the valve seat 122. It is also possible to close the valve, which also contributes to safety.

In this embodiment, the upper end of the valve body 120 and the lower end of the rotor 106 are not connected, but they may be connected if the stroke of the rotor 106 and the like are taken into consideration.

Further, although the guide 100 is provided with a female threaded portion 104 and the rotor 106 is provided with a male threaded portion 110, they may have the same configuration as the first embodiment. Furthermore, in the case of a flow rate control valve, the shape of the valve body may be a needle valve.

[Third Embodiment] A third embodiment will be described with reference to FIGS. 3 and 4 (cross-sectional view taken along line AA in FIG. 3). In this embodiment, a pilot valve is used.

200 is a guide whose upper end is fixed to the main body 202;
A male butterfly portion 204 is carved on the outer peripheral surface.

A rotor 206 is provided with a female thread 208, and is rotatably screwed into the male thread 204 of the guide 200. The upper surface 210 of the rotor 206 has N3S (ff
The poles are alternately magnetized in the circumferential direction. A through hole 212 whose upper portion communicates with the female thread 208 is provided in the center of the rotor 206, and a ball 214 is disposed at the lower end of the through hole 212 so as to be movable up and down.

Reference numeral 216 denotes a valve body, which consists of a diaphragm 218 whose peripheral edge is fixed to the main body 202 and a diaphragm plate 220 fitted into the center of the diaphragm 218. A pilot valve seat 222 is provided on the diaphragm plate 220,
It can be loosely inserted into the lower part of the through hole 212 of the rotor 206. Further, the diaphragm plate 220 is provided with a book portion 224, which can engage with a flange portion 226 of the rotor 206 when the rotor 206 moves upward. Further, a small hole 228 is formed in the diaphragm plate 220 so that back pressure is applied by fluid to a back pressure chamber 230 partitioned by the diaphragm 218. Four fins 2 232 are provided on the lower outer peripheral surface of the valve body 216 and extend in the radial direction.
... is a rib 236 protruding from the inner wall surface of the outlet pipe 234.
It is possible to move up and down within the guide groove 238 carved in....

A stator 240 has the same configuration as the first and second embodiments, and rotates the rotor 206 when DC current is applied.

242 is a spring, which also has the same structure as the spring 22 of the first embodiment (FIG. 1).

246 is a mounting portion, which is also the mounting portion 32 of the first embodiment.
(FIG. 1), it is possible to install a drive circuit (not shown) for the stator 240... inside.

The operation of the third embodiment will be explained. In FIG. 3, the stator 240 is in a non-energized state, and the ball 214 is blocking the pilot valve seat 222. Therefore, the inlet pipe 24
Fluid (eg, water) supplied from 8 enters the back pressure chamber 230 through the small hole 228, but since the pilot valve seat 222 is closed, the diaphragm 218 is pressed against the valve seat 250 by fluid pressure.

As a result, fluid is prevented from flowing from inlet tube 248 to outlet tube 234.

Here, when the stator 240... is energized, the rotor 20
6 rotates and moves upward. Then, the ball 214 also moves upward together with the rotor 206 to open the pilot valve seat 222, so that the fluid in the back pressure chamber 230 flows from the pilot valve seat 222 to the outlet pipe 234. As a result, the back pressure acting on the diaphragm 218 is canceled out. Furthermore, the rotor 206
When it rotates and moves upward, the flange portion 226 and the hook portion 22
4 is engaged, and as the rotor 206 moves upward, the diaphragm 218 also moves upward. At this time, since no back pressure is already applied to the back pressure chamber 230, the diaphragm 218 can be easily moved upward. The upward movement of diaphragm 218 opens valve seat 250 and fluid flows out to outlet tube 234 .

When closing the valve seat 250, if the power supply to the stator 240 is stopped, the spring 24 will close as in the first embodiment.
The force of 2 causes the rotor 206 to reversely rotate and move downward, returning to its previous position. Due to the downward movement of the rotor 206, the pole 214
When the pilot valve seat 222 is closed again, the small hole 228
Fluid pressure from the valve acts within the backpressure chamber 230 and forces the diaphragm 218 against the valve seat 250. Then, the valve seat 250 is closed and the outflow of fluid is stopped.

In this embodiment as well, the spring 242 is similar to the first embodiment.
does not necessarily have to be present, in which case the rotor 20
6 should be rotated in the opposite direction and moved downward.

[Fourth Example] A fourth example will be described with reference to FIG. 5. This embodiment is an example in which stators 300 are arranged inside a rotor 304, although they are separated by a main body 302.

The magnetic poles of the rotor 304 are arranged on the inner bottom surface 306,
Depending on the shape of the stakes 300..., magnetic poles may be arranged on the inner peripheral surface 308 of the rotor 304. The fourth embodiment can be applied to the first to third embodiments described above.

In each of the embodiments described above, the spring arrangement location 5 is not limited to above the rotor, but may also be provided below the rotor.

Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. be.

(Effects of the Invention) When the valve device according to the present invention is used, the valve body is seated on the valve seat by moving towards and away from the valve as the rotor rotates. Therefore, even if the stator is energized, the valve body does not immediately sit down, so it is possible to prevent walk hammer from occurring, and it is possible to prevent noise and damage to pipes and the like. In addition, in proportional control valves, the valve opening can be set arbitrarily by controlling the rotation amount of the rotor, for example, by controlling the energization time to the stator, making it possible to precisely adjust the valve opening without using a complicated adjustment mechanism. Become. In the pilot valve, the diaphragm, which is a valve body, is moved toward and away from the rotor as the rotor moves toward and away from the valve, so the valve opening can be made large even when the fluid pressure is low, and a large flow rate can be ensured.

Furthermore, when the configuration of claim 2 is adopted, the valve body can be returned to its previous position when the energization to the stator is stopped, and there is no need to energize the stator during the return, which is economical. In particular, if the structure is configured to stop the outflow of gas during a power outage, for example, it can contribute to improving the safety of the appliance.

Furthermore, if the configuration of claim 3 is adopted, the valve device and the drive circuit can be integrated, wiring can be kept to a minimum, and compactness can be achieved. For manufacturers of valve devices, this has great effects, such as the ability to provide a drive circuit and perform waterproofing by bonding after adjustment.

[Brief explanation of drawings]

1 is a front sectional view showing a first embodiment of the valve device according to the present invention, FIG. 2 is a front sectional view of the second embodiment, FIG. 3 is a front sectional view of the third embodiment, and FIG. The figure is a sectional view taken along the line A-A in FIG. 3, and FIG. 5 is a partial front sectional view of the fourth embodiment. 10... Guide, 12... Main body, 14... Male thread, 16... Rotor, 18... Female thread,
22...Spring, 24...Stator, 28.
...Valve body, 30...Valve seat, 32...Mounting part, 1
00... Guide, 102... Main body, 104...
・Female thread, 106... Rotor, 110... Male thread, 120... Valve body, 122... Valve seat,
124... Stator, 200... Guide, 20
2...Main body, 204...Male thread, 206...
Rotor, 208... Female thread, 216... Valve body, 2
40... Stator, 242... Spring, 2
46... Mounting part, 250... Valve seat, 300... Stator, 302...
...Main body, 304...Rotor. Procedural amendment written in Heiseiguchi 2, 2002, name of invention Valve device patent application No. 62012 3, relationship with the person making the amendment case

Claims (1)

[Claims] 1. In a valve device that opens and closes a flow path or adjusts flow rate by moving a valve body toward and away from a valve seat, a male thread is carved into the outer peripheral surface or a female thread is carved into the inner peripheral surface. one end is fixed to the main body, and the other end is arranged in the direction of the valve seat, and a magnetic pole is arranged on the outer periphery, and is rotatably screwed into the male or female thread of the guide. a rotor that moves toward and away from the valve seat as it rotates and also moves the valve body toward and away from the valve seat; and a rotor that is disposed close to the rotor and when energized. A valve device comprising a stator that rotates a rotor. 2. The valve device according to claim 1, further comprising a spring having one end fixed to the main body and the other end fixed to the rotor. 3. The valve device according to claim 1 or 2, wherein the stator drive circuit is attached to the main body.