JPH06235476A - Valve device - Google Patents

Abstract

PURPOSE:To provide a valve device capable of certainly working regardless of a use condition in the case when actuation is actually demanded by providing an inclined surface part to close as a slide element is depressed in the inclined surface part of an opening part. CONSTITUTION:On a part adjacent to a primary side passage 2 of a small cavity 3, an expansion chamber 10 is installed and an inclined surface part 11 is installed between them. In the same way, between a secondary side passage 6 and a large inner cell 7, an inclined surface part 12 is installed. On a slide element 13, a communication passage 14 to communicate the expansion chamber 10 with the large inner cell 7 is provided, and the inclined surface part 15 adapted for the inclined surface part 11 is installed on one end part and an inclined surface part 16 adapted for the inclined surface part 12 is installed on the other end part. Between the slide element 13 and the cavity, O rings 17, 18 are installed, and on inclined surface parts 15, 16, O rings 19, 20 are installed. It is designed so that an area receiving pressure applied from the primary side passage 2 to the slide element 13 and an area receiving pressure applied from the secondary side passage 6 designed be a ratio of about 1:3. Consequently, when the secondary side pressure is lowered, the slide element moves to the right.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve device which functions as a trigger suitable for starting various valve devices.

[0002]

2. Description of the Related Art A so-called pilot valve has been conventionally known as a means for starting various valve devices. A general structure of the pilot valve is as shown in FIG. 4, in which a diaphragm D is liquid-tightly sandwiched between a base B and a cover C, and a primary passage I and a secondary passage II are provided in the base B. And the opening between these two passages is blocked by a disk Z having a packing P, and a pressurizing chamber K facing the diaphragm D is provided continuously to the secondary passage II.

The spindle J of the handle H installed outside the cover C is screwed into the cover C, the tip of which is inside the cover C, and one end of which is pressed against the diaphragm D.
Is in contact with the pressure plate Q which is in pressure contact with the other end of the spring S which is in contact with.

Further, the projecting rod T projecting from the pressing plate O into the pressurizing chamber K of the base B hits the shaft rod X extending from the disk Z that blocks between the primary side passage I and the secondary side passage II. Touching,
A small spring s is stretched on the disk Z in such a direction that the disk Z always blocks two passages. In the figure, Y is a guide valve for guiding the operation of the disk Z portion and for repairing the disk Z when a failure occurs.

When using the pilot valve, refer to FIG.
As shown in (1), the primary passage I is connected to the upper chamber U of the piston receiving the water pressure on the primary side F (water source side) of the valve device V, and the secondary passage II of the valve device V is connected. Connect to the secondary side G (destination side). In the illustrated automatic pressure adjustment type valve device V, the secondary side G is different from the primary side F pressure.
At a low pressure (for example, a pressure ratio of about 10 to 7), the valve body E maintains the closed state, the flow path opening M continues to be blocked, the pressure on the secondary side G decreases, and the primary side F decreases. When the pressure ratio of the secondary side G becomes less than 10: 7, the valve body E moves and the flow path opening M is opened.

In the pilot valve A used for starting the valve device V, water (or air) having a pressure of 10 is supplied to the primary passage I, and the secondary passage II has approximately seven water. Water (or air) having a pressure of is supplied. The pressure (10) in the primary passage I is applied to the outer peripheral surface of the disk Z, and the pressure (7) in the secondary passage II is applied to the packing P of the disk Z and the diaphragm D in the pressurizing chamber K. .

The small spring s presses the disk Z into the opening between the primary side passage I and the secondary side passage II to interrupt the conduction between the two, but the pressure in the secondary side passage II decreases. When the pressure is less than 7, the pressure in the pressurizing chamber K is also reduced and the pressure applied to the diaphragm D is reduced. Therefore, the pressure in the pressurizing chamber K is balanced via the diaphragm D to be in a neutral state. The existing spring S shifts to a state in which it can function, and the pressing plate O pushes down the diaphragm D in FIG. 4, and the operation of the pressing plate O is transmitted to the disk Z via the thrust rod T and the shaft rod X, The disk Z is pushed down against the action of the small spring s, the opening between the two passages is unblocked, and the water (or air) in the primary passage I flows into the secondary passage II. Will be done.

By adjusting the pressure of the spring S with the handle H, the pilot valve A operates in such a manner that the pressure in the primary passage I and the pressure in the secondary passage II operate at less than 10: 7, or 10: 8. It is possible to arbitrarily set a state in which the valve operates at less than this value, and by causing the pilot valve A to serve as a trigger, it is possible to operate an automatic pressure control type valve device V or the like as shown in FIG. 5, for example. .

[0009]

The problem is that the pilot valve is not always used and the actual operation is often only during a periodic inspection once a year. For a long time, the packing P of the disk Z
That is, the two passages are always blocked.

The packing P is of a type in which the flat surface portion is in close contact with the opening portion of the passage so as to block it. Therefore, the packing member P is deformed when closed and blocked for a long period of time, and the opening portion is buried in the flat surface portion. It is inevitable that the packing P will stick or stick to the opening.

In the former case, when the pressure in the secondary passage II drops below a predetermined value and the disk Z moves, the moving distance cannot be secured sufficiently, and as a result, the opening is blocked. In the latter case, the disk Z itself cannot move and the interruption is also unsolvable.

When such a pilot valve A is used in the circuit of the sprinkler device, it is fully possible that the sprinkler does not operate at all due to inoperability or malfunction of the pilot valve A in an emergency requiring operation. This is due to the structure itself in which the opening portion is blocked by the flat portion of the packing P of the disk Z, and is a phenomenon sometimes seen in "comas" and the like used in general water faucets.

However, it is obvious that such a situation, which is not much of a problem in a domestic water faucet, is a fatal defect for a security device such as a sprinkler, and such a situation must be solved by some means. I have to.

[0014]

When the packing P continues to block the opening between the primary side passage I and the secondary side passage II, the packing P may be deformed or the packing P may stick to the opening. This is due to the fact that the flat portion of the packing P is brought into pressure contact with the opening to perform the blocking, and it is considered that this problem will be solved if another method or form can be adopted for the blocking.

As a method of not using the flat portion of the packing when shutting off the passage air-tightly or liquid-tightly, O-
A ring type is conceivable, but as mentioned above, with the pressure of about 10 on the primary side of the valve device and about 7 on the secondary side, normally the two passages are shut off and the secondary side is shut off. In order to be able to release the interruption when the pressure of 7 drops from 7 to less than 7, the problem cannot be solved simply by replacing the flat packing with an O-ring.

In order to solve this problem, in the present invention, the cylinder is provided with two passages connected to the primary side F (upper chamber U of the piston) and the secondary side G of the valve device V, and the cylinder is provided. The slider is enclosed in the inside of the, and pressure receiving surfaces facing each passage are installed at both ends of the slider, and the area ratio between the pressure receiving surface facing the primary side F and the pressure receiving surface facing the secondary side G is For example, by setting it to 1: 3, the ratio of the pressure applied to the slider becomes 10:21 when the pressure on the secondary side G (10) is shut off from the pressure on the secondary side G (10). When the pressure on the secondary side G becomes (three) with respect to the pressure on the side F (ten), the ratio becomes 10: 9 so that the interruption is released.

In this case, the pressure receiving areas at both ends of the slider can be designed arbitrarily, but the safety factor is controlled because the slider is controlled only by the balance of pressure applied to both ends without using separate springs or the like. The ratio of the pressure receiving area is set to 1: 3 by taking a large value. As a result, when the device of the present invention is installed alongside the conventional pilot valve A and the pilot valve A operates at a desired pressure ratio of less than 10 to 7, the device of the present invention does not operate at all, and the pilot valve A It is possible to obtain a combination in which the device of the present invention operates to compensate for the non-operation of the pilot valve A only when the pressure on the secondary side significantly decreases without operating at all.

The seal between the cylinder and the slider is provided by an O-ring, and the O-ring is fully provided with, for example, silicon grease to provide a satisfactory performance which cannot be obtained with the flat packing P. You can When the device does not operate for a long time, the O-ring used is also deformed, but unlike the deformation of the flat packing P, the circular cross section of the O-ring is deformed into an elliptical shape. Since it is of a type that does not cause a shortage of movement amount during operation, it is possible to almost completely eliminate the inoperability due to sticking.

In order to shut off and open the fluid passage by the slider sliding in the cylinder, a primary passage and a secondary passage are bored along the sliding direction of the slider, and this is started. Connected to the primary side F and the secondary side G of the valve device V to be
If the pressure from both passages is applied to one of the ends of the slider, the slider will not need to be provided with any urging member such as a spring to move the slider as described above. The product of the present invention can be operated only by changing the pressure applied to the device.

In order to seal the space between the cylinder and the slider with an O-ring, the space between the cylinder and the slider is
For example, the O-ring may be installed in a state like a piston ring of an automobile engine, but more preferably, an inclined surface of about 60 degrees that surrounds the inner wall of the cylinder is provided and the slider is also adapted to this. If an inclined surface is provided and an O-ring is installed along one of these inclined surfaces, smooth shutoff and opening can be performed smoothly without applying unnecessary pressure to the O-ring.
It can be carried out in.

Such a structure can be used not only in the case where the slider has the shape of a piston but also in a "coma" for a general water faucet and a disk Z of a conventional pilot valve, and they are fully satisfactory. The possible functions are achieved.

[0022]

An embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a first cylinder 5 having a primary passage 2 and a small lumen 3 to be connected to a primary side F of a valve device V, and a male screw 4 for screwing at the end thereof. Valve device V
A second cylinder having a secondary passage 6 and a large lumen 7 to be connected to the secondary side G, and having an internal thread 8 screwed to the male thread 4 of the first cylinder 1 at the end thereof, Reference numeral 9 is a fixing screw which is screwed into the second cylinder 5 and fixes the first cylinder 1 and the second cylinder 5 to each other.

When the first cylinder 1 and the second cylinder 5 are integrated by screwing their male screw 4 and female screw 8 to each other, the small lumen 3 and the large lumen 7 installed therein are continuous. To form a single lumen. The primary passage 2 is continuous with the small lumen 3 and the secondary passage 6 is continuous with the large lumen 7. The primary cylinder 2 and the second cylinder 5 connect the primary passage 2 to the primary passage 2.
-A small lumen 3-large lumen 7-secondary passage 6 is formed.

Primary passage 2 of small lumen 3 of first cylinder 1
The expansion chamber 10 is installed in a portion close to the expansion chamber so that the diameter of the small lumen 3 is widened, and the slope of the small lumen is opened between the primary passage 2 and the expansion chamber 10 toward the expansion chamber 10. The section 11 is installed. Similarly, between the secondary passage 6 and the large lumen 7, a large lumen slope portion 12 having a shape opened toward the large lumen 7 is provided.

Reference numeral 13 is a slider installed inside the inner cavity formed by the small lumen 3 and the large lumen 7, and a conduction path 14 for communicating the expansion chamber 10 and the large lumen 7 is bored therein. At the same time, a small-lumen slider slope 15 that fits the small-lumen slope 11 is provided at the end inside the small lumen 3, and a large-lumen slope is provided at the end inside the large lumen 7. Large-lumen slider slope part 1 that fits the part 12
6 are installed respectively.

A seal member composed of an O-ring is applied between the slider 13 and the inner cavity, and the first seal member 17 is provided between the slider 13 and the inner wall of the small inner cavity 3 in the second direction. The seal material 18 is installed between the enlarged diameter portion 13 ′ of the slider 13 and the inner wall of the large lumen 7, and the slider 1 is provided by these two seal materials.
3 can slide in both lumens in an airtight manner.

The third sealing member 19 is the slant surface portion 1 of the small lumen slider.
5, the small lumen slope portion 11 and the small lumen slide slope portion 15 maintain airtightness between them when they come into contact with each other, and the fourth seal member 20 is the large lumen slope surface. When the portion 12 and the large-lumen slider slant portion 15 come into contact with each other, they serve to maintain airtightness therebetween.

Reference numeral 21 is a ventilation hole formed in the second cylinder 5, which is provided for allowing the air between the slider 13 in the large lumen 7 and the end of the first cylinder 1 to flow to the outside. Has been. For example, as shown in FIG. 1, from the state where the small-lumen slope portion 11 and the small-lumen slider slope portion 15 are in contact with each other, the large-lumen slope portion 12 and the large-lumen slider slope portion 16 are contacted as shown in FIG. In order to shift to the state of contacting, the outside air is sucked between the end portion of the first cylinder 1 and the enlarged diameter portion 13 ′ of the slider 13, and in the opposite operation, the inside air is sucked. Becomes a passage for discharging the gas to the outside.

When this embodiment is applied to the automatic pressure control valve V and the pilot valve A is assisted, the connection is parallel to the existing pilot valve A as shown in FIG.
The primary side F (the upper chamber U of the piston chamber in the case shown) of the automatic pressure control valve V is connected to the primary side passage 2 of the trigger valve L of the present invention via the water supply side sluice valve 22, and the secondary side passage 6 is connected to the secondary side G of the automatic pressure control valve V via the water supply side sluice valve 23.

To set the trigger valve L, the existing pilot valve A and each part of the automatic pressure adjusting valve V are adjusted with the water source side sluice valve 22 and the water destination side sluice valve 23 kept in the "closed" state. After supplying the fluid to the tank, when the whole becomes stable, first open the gate valve 23 on the water destination side.
Then, the fluid pressure on the secondary side G of the automatic pressure control valve V is applied to the secondary side passage 6 of the trigger valve L.

As a result, the slider 13 at an arbitrary position moves to the left end in the inner cavity as shown in FIG. 1, and the small-lumen slope portion 11 and the small-lumen slider slope portion 15 come into contact with each other, The third sealing material 19 closes the primary passage 2.

Next, the water supply side sluice valve 22 is set to "open",
The fluid pressure in the primary side F (in this case, the upper chamber U of the piston chamber) of the automatic pressure control valve V is changed to the primary side passage 2 of the first cylinder 1.
Add to. In this case, pressure is applied to the end of the slider 13 that has already closed the primary passage 2, but an area that receives the pressure applied from the primary passage 2 to the slider 13, Since the area receiving the pressure applied from the secondary side passage 6 is designed to form a ratio of about 1: 3, the pressure on the primary side F is (10) and the pressure on the secondary side G is (7). ) Is set, the slider 13 is pressed by the force (10) from the primary side passage 2 and the secondary side passage 6
Since it will be pressed with a force of (21) from
There is no movement from the state of.

In a sprinkler circuit incorporating the automatic pressure control valve V, if a fire occurs and the pressure in the secondary passage 6 drops sharply, there is no problem if the pilot valve A operates properly in FIG. However, if it fails and does not work, the secondary passage 6 of the trigger valve L
And the pressure applied to the large lumen 7 decreases, and the slider 1
When the force of (21) applied to 3 decreased and the pressure of the secondary side G dropped to (3), the force to piston 13 which was 10:21 changed to 10: 9. Then, the piston 13 slides to the right from FIG. 1 due to the pressure from the primary side passage 2, the blockage of the primary side passage 2 is released, and the fluid in the primary side passage 2 is expanded by the expansion chamber 10 and the slider. It flows into the secondary side passage 6 through the communicating hole 14 of 13 and the large lumen 7, and further flows into the secondary side G of the automatic pressure control valve V.

By this series of movements of the fluid, the pressure in the upper chamber U of the piston chamber of the valve device V in FIG. 3 is lowered, and the valve body driving piston in the piston chamber is pushed up by the fluid pressure of the primary side F, so that the valve device. Valve body E connected to piston
Rises to release the closing of the flow opening M, and the fluid on the primary side F flows into the secondary side G from the flow opening M and is sent to the sprinkler or the like of the water destination.

As described above, by providing the trigger valve L according to the present invention together with the conventional pilot valve A,
Accidents due to malfunction of pilot valve A can be completely prevented. In actual use, by setting the operating pressure of the pilot valve A in FIG. 3 higher than the operating pressure of the trigger valve L, when the pilot valve A operates properly, the trigger valve L does not operate, It is also possible to easily set the trigger valve L to operate only when the pilot valve A is not operated.

FIG. 6 shows an embodiment in which the idea of the present invention is applied to a conventional pilot valve A, in which a disk Z of the conventional pilot valve A and a flat packing P are connected to the disk slope portion 15 'and the disk. Sealing material 1 installed on slope 15 '
9 ', and the opening between the primary side passage I and the secondary side passage II has an opening slope 11' corresponding to the disk slope 15 '.
As a result, the fluid flow is blocked by the pressure contact between the opening sloped surface 11 'and the disk sloped surface. It is obvious that similar processing can be easily applied to the "top" of the water faucet, and can be applied to various valve devices in a wide range.

[0037]

As described above, according to the present invention, it is possible to obtain a novel device using a flat packing in which malfunction of a valve element is surely removed, and thereby a solution of malfunction of a pilot valve is obtained. It is also possible to obtain a trigger valve that becomes a new type, and by applying it, there is an effect that a new type of pilot valve can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment of the present invention when closed.

FIG. 2 is a sectional view of an embodiment of the present invention when opened.

FIG. 3 is a conceptual diagram when the embodiment of the present invention is attached to the valve device.

FIG. 4 is a sectional view of a conventional pilot valve.

FIG. 5 is a conceptual diagram of an automatic pressure control valve equipped with a conventional pilot valve.

FIG. 6 is a partial sectional view of an embodiment in which the present invention is applied to a pilot valve.

[Explanation of symbols]

 1 First Cylinder 2 Primary Side Passage 3 Small Lumen 4 Male Screw 5 Second Cylinder 6 Secondary Side Passage 7 Large Lumen 8 Female Screw 9 Fixing Screw 10 Expansion Chamber 11 Small Lumen Slope 12 Large Lumen Slope 13 Slider 14 Conduction hole 15 Small lumen piston sloped surface 16 Large lumen piston sloped surface 17 First sealing material 18 Second sealing material 19 Third sealing material 20 Fourth sealing material 21 Vent hole 22 Water source gate valve 23 Transmission Pilot gate valve

Claims (2)

[Claims] 1. A slider and an opening, wherein the opening is provided with a sloped surface that opens in one direction, and the slider is recessed into the sloped surface of the opening to close the sloped surface. A valve device comprising a sliding member sloped surface, and a sealing material applied to the sliding surface sloped part. 2. A first cylinder having a primary passage, a small-lumen slope portion, an expansion chamber, and a small lumen bored therein, and a first cylinder provided with a male screw at the end where the small lumen opens, and a second cylinder inside. In the secondary passage, the large-lumen slope, the large-lumen, and the second cylinder equipped with the female screw that is screwed to the male screw of the first cylinder, the expansion chamber of the first cylinder and the large-lumen of the second cylinder. A large-inner-side slider slant that fits into the small-lumen slanted surface is fitted with a small inner-lumen slidable surface at one end and a large-inner-lumen slanted surface is fitted into the large inner-lumen slanted surface. The first cylinder and the second cylinder are screwed together, and the slider is installed in a slidable manner in a liquid-tight manner inside the slider. A valve device characterized in that a vent hole for entering and exiting is installed.